| File: | var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp |
| Warning: | line 4127, column 5 Value stored to 'dbg' is never read |
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| 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| 2 | * vim: set ts=8 sts=2 et sw=2 tw=80: |
| 3 | * This Source Code Form is subject to the terms of the Mozilla Public |
| 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| 6 | |
| 7 | #include "debugger/Debugger-inl.h" |
| 8 | |
| 9 | #include "mozilla/Attributes.h" // for MOZ_STACK_CLASS, MOZ_RAII |
| 10 | #include "mozilla/DebugOnly.h" // for DebugOnly |
| 11 | #include "mozilla/DoublyLinkedList.h" // for DoublyLinkedList<>::Iterator |
| 12 | #include "mozilla/HashTable.h" // for HashSet<>::Range, HashMapEntry |
| 13 | #include "mozilla/Maybe.h" // for Maybe, Nothing, Some |
| 14 | #include "mozilla/ScopeExit.h" // for MakeScopeExit, ScopeExit |
| 15 | #include "mozilla/Sprintf.h" // for SprintfLiteral |
| 16 | #include "mozilla/ThreadLocal.h" // for ThreadLocal |
| 17 | #include "mozilla/TimeStamp.h" // for TimeStamp |
| 18 | #include "mozilla/UniquePtr.h" // for UniquePtr |
| 19 | #include "mozilla/Variant.h" // for AsVariant, AsVariantTemporary |
| 20 | #include "mozilla/Vector.h" // for Vector, Vector<>::ConstRange |
| 21 | |
| 22 | #include <algorithm> // for std::find, std::max |
| 23 | #include <functional> // for function |
| 24 | #include <stddef.h> // for size_t |
| 25 | #include <stdint.h> // for uint32_t, uint64_t, int32_t |
| 26 | #include <string.h> // for strlen, strcmp |
| 27 | #include <type_traits> // for std::underlying_type_t |
| 28 | #include <utility> // for std::move |
| 29 | |
| 30 | #include "jsapi.h" // for CallArgs, CallArgsFromVp |
| 31 | #include "jstypes.h" // for JS_PUBLIC_API |
| 32 | |
| 33 | #include "builtin/Array.h" // for NewDenseFullyAllocatedArray |
| 34 | #include "debugger/DebugAPI.h" // for ResumeMode, DebugAPI |
| 35 | #include "debugger/DebuggerMemory.h" // for DebuggerMemory |
| 36 | #include "debugger/DebugScript.h" // for DebugScript |
| 37 | #include "debugger/Environment.h" // for DebuggerEnvironment |
| 38 | #ifdef MOZ_EXECUTION_TRACING1 |
| 39 | # include "debugger/ExecutionTracer.h" // for ExecutionTracer::onEnterFrame, ExecutionTracer::onLeaveFrame |
| 40 | #endif |
| 41 | #include "debugger/Frame.h" // for DebuggerFrame |
| 42 | #include "debugger/NoExecute.h" // for EnterDebuggeeNoExecute |
| 43 | #include "debugger/Object.h" // for DebuggerObject |
| 44 | #include "debugger/Script.h" // for DebuggerScript |
| 45 | #include "debugger/Source.h" // for DebuggerSource |
| 46 | #include "frontend/CompilationStencil.h" // for CompilationStencil |
| 47 | #include "frontend/FrontendContext.h" // for AutoReportFrontendContext |
| 48 | #include "frontend/Parser.h" // for Parser |
| 49 | #include "gc/GC.h" // for IterateScripts |
| 50 | #include "gc/GCContext.h" // for JS::GCContext |
| 51 | #include "gc/GCMarker.h" // for GCMarker |
| 52 | #include "gc/GCRuntime.h" // for GCRuntime, AutoEnterIteration |
| 53 | #include "gc/HashUtil.h" // for DependentAddPtr |
| 54 | #include "gc/Marking.h" // for IsAboutToBeFinalized |
| 55 | #include "gc/PublicIterators.h" // for RealmsIter, CompartmentsIter |
| 56 | #include "gc/Statistics.h" // for Statistics::SliceData |
| 57 | #include "gc/Tracer.h" // for TraceEdge |
| 58 | #include "gc/Zone.h" // for Zone |
| 59 | #include "gc/ZoneAllocator.h" // for ZoneAllocPolicy |
| 60 | #include "jit/BaselineDebugModeOSR.h" // for RecompileOnStackBaselineScriptsForDebugMode |
| 61 | #include "jit/BaselineJIT.h" // for FinishDiscardBaselineScript |
| 62 | #include "jit/Invalidation.h" // for RecompileInfoVector |
| 63 | #include "jit/JitContext.h" // for JitContext |
| 64 | #include "jit/JitOptions.h" // for fuzzingSafe |
| 65 | #include "jit/JitScript.h" // for JitScript |
| 66 | #include "jit/JSJitFrameIter.h" // for InlineFrameIterator |
| 67 | #include "jit/RematerializedFrame.h" // for RematerializedFrame |
| 68 | #include "js/CallAndConstruct.h" // JS::IsCallable |
| 69 | #include "js/Conversions.h" // for ToBoolean, ToUint32 |
| 70 | #include "js/Debug.h" // for Builder::Object, Builder |
| 71 | #include "js/friend/ErrorMessages.h" // for GetErrorMessage, JSMSG_* |
| 72 | #include "js/GCAPI.h" // for GarbageCollectionEvent |
| 73 | #include "js/GCVariant.h" // for GCVariant |
| 74 | #include "js/HeapAPI.h" // for ExposeObjectToActiveJS |
| 75 | #include "js/Promise.h" // for AutoDebuggerJobQueueInterruption |
| 76 | #include "js/PropertyAndElement.h" // for JS_GetProperty |
| 77 | #include "js/Proxy.h" // for PropertyDescriptor |
| 78 | #include "js/SourceText.h" // for SourceText |
| 79 | #include "js/StableStringChars.h" // for AutoStableStringChars |
| 80 | #include "js/UbiNode.h" // for Node, RootList, Edge |
| 81 | #include "js/UbiNodeBreadthFirst.h" // for BreadthFirst |
| 82 | #include "js/Wrapper.h" // for CheckedUnwrapStatic |
| 83 | #include "util/Identifier.h" // for IsIdentifier |
| 84 | #include "util/Text.h" // for DuplicateString, js_strlen |
| 85 | #include "vm/ArrayObject.h" // for ArrayObject |
| 86 | #include "vm/AsyncFunction.h" // for AsyncFunctionGeneratorObject |
| 87 | #include "vm/AsyncIteration.h" // for AsyncGeneratorObject |
| 88 | #include "vm/BytecodeUtil.h" // for JSDVG_IGNORE_STACK |
| 89 | #include "vm/Compartment.h" // for CrossCompartmentKey |
| 90 | #include "vm/EnvironmentObject.h" // for IsSyntacticEnvironment |
| 91 | #include "vm/ErrorReporting.h" // for ReportErrorToGlobal |
| 92 | #include "vm/GeneratorObject.h" // for AbstractGeneratorObject |
| 93 | #include "vm/GlobalObject.h" // for GlobalObject |
| 94 | #include "vm/Interpreter.h" // for Call, ReportIsNotFunction |
| 95 | #include "vm/Iteration.h" // for CreateIterResultObject |
| 96 | #include "vm/JSAtomUtils.h" // for Atomize, AtomizeUTF8Chars, AtomIsMarked, AtomToId, ClassName |
| 97 | #include "vm/JSContext.h" // for JSContext |
| 98 | #include "vm/JSFunction.h" // for JSFunction |
| 99 | #include "vm/JSObject.h" // for JSObject, RequireObject, |
| 100 | #include "vm/JSScript.h" // for BaseScript, ScriptSourceObject |
| 101 | #include "vm/ObjectOperations.h" // for DefineDataProperty |
| 102 | #include "vm/PlainObject.h" // for js::PlainObject |
| 103 | #include "vm/PromiseObject.h" // for js::PromiseObject |
| 104 | #include "vm/ProxyObject.h" // for ProxyObject, JSObject::is |
| 105 | #include "vm/Realm.h" // for AutoRealm, Realm |
| 106 | #include "vm/Runtime.h" // for ReportOutOfMemory, JSRuntime |
| 107 | #include "vm/SavedFrame.h" // for SavedFrame |
| 108 | #include "vm/SavedStacks.h" // for SavedStacks |
| 109 | #include "vm/Scope.h" // for Scope |
| 110 | #include "vm/StringType.h" // for JSString, PropertyName |
| 111 | #include "vm/WrapperObject.h" // for CrossCompartmentWrapperObject |
| 112 | #include "wasm/WasmDebug.h" // for DebugState |
| 113 | #include "wasm/WasmInstance.h" // for Instance |
| 114 | #include "wasm/WasmJS.h" // for WasmInstanceObject |
| 115 | #include "wasm/WasmRealm.h" // for Realm |
| 116 | #include "wasm/WasmTypeDecls.h" // for WasmInstanceObjectVector |
| 117 | |
| 118 | #include "debugger/DebugAPI-inl.h" |
| 119 | #include "debugger/Environment-inl.h" // for DebuggerEnvironment::owner |
| 120 | #include "debugger/Frame-inl.h" // for DebuggerFrame::hasGeneratorInfo |
| 121 | #include "debugger/Object-inl.h" // for DebuggerObject::owner and isInstance. |
| 122 | #include "debugger/Script-inl.h" // for DebuggerScript::getReferent |
| 123 | #include "gc/GC-inl.h" // for ZoneCellIter |
| 124 | #include "gc/Marking-inl.h" // for MaybeForwarded |
| 125 | #include "gc/StableCellHasher-inl.h" |
| 126 | #include "gc/WeakMap-inl.h" // for DebuggerWeakMap::trace |
| 127 | #include "vm/Compartment-inl.h" // for Compartment::wrap |
| 128 | #include "vm/GeckoProfiler-inl.h" // for AutoSuppressProfilerSampling |
| 129 | #include "vm/JSAtomUtils-inl.h" // for AtomToId, ValueToId |
| 130 | #include "vm/JSContext-inl.h" // for JSContext::check |
| 131 | #include "vm/JSObject-inl.h" // for JSObject::isCallable, NewTenuredObjectWithGivenProto |
| 132 | #include "vm/JSScript-inl.h" // for JSScript::isDebuggee, JSScript |
| 133 | #include "vm/NativeObject-inl.h" // for NativeObject::ensureDenseInitializedLength |
| 134 | #include "vm/ObjectOperations-inl.h" // for GetProperty, HasProperty |
| 135 | #include "vm/Realm-inl.h" // for AutoRealm::AutoRealm |
| 136 | #include "vm/Stack-inl.h" // for AbstractFramePtr::script |
| 137 | |
| 138 | namespace js { |
| 139 | |
| 140 | namespace frontend { |
| 141 | class FullParseHandler; |
| 142 | } |
| 143 | |
| 144 | namespace gc { |
| 145 | struct Cell; |
| 146 | } |
| 147 | |
| 148 | namespace jit { |
| 149 | class BaselineFrame; |
| 150 | } |
| 151 | |
| 152 | } /* namespace js */ |
| 153 | |
| 154 | using namespace js; |
| 155 | |
| 156 | using JS::AutoStableStringChars; |
| 157 | using JS::CompileOptions; |
| 158 | using JS::dbg::Builder; |
| 159 | using mozilla::AsVariant; |
| 160 | using mozilla::DebugOnly; |
| 161 | using mozilla::MakeScopeExit; |
| 162 | using mozilla::Maybe; |
| 163 | using mozilla::Nothing; |
| 164 | using mozilla::Some; |
| 165 | using mozilla::TimeStamp; |
| 166 | |
| 167 | /*** Utils ******************************************************************/ |
| 168 | |
| 169 | bool js::IsInterpretedNonSelfHostedFunction(JSFunction* fun) { |
| 170 | return fun->isInterpreted() && !fun->isSelfHostedBuiltin(); |
| 171 | } |
| 172 | |
| 173 | JSScript* js::GetOrCreateFunctionScript(JSContext* cx, HandleFunction fun) { |
| 174 | MOZ_ASSERT(IsInterpretedNonSelfHostedFunction(fun))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsInterpretedNonSelfHostedFunction(fun))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(IsInterpretedNonSelfHostedFunction(fun)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("IsInterpretedNonSelfHostedFunction(fun)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 174); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsInterpretedNonSelfHostedFunction(fun)" ")"); do { *((volatile int*)__null) = 174; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 175 | AutoRealm ar(cx, fun); |
| 176 | return JSFunction::getOrCreateScript(cx, fun); |
| 177 | } |
| 178 | |
| 179 | ArrayObject* js::GetFunctionParameterNamesArray(JSContext* cx, |
| 180 | HandleFunction fun) { |
| 181 | RootedValueVector names(cx); |
| 182 | |
| 183 | // The default value for each argument is |undefined|. |
| 184 | if (!names.growBy(fun->nargs())) { |
| 185 | return nullptr; |
| 186 | } |
| 187 | |
| 188 | if (IsInterpretedNonSelfHostedFunction(fun) && fun->nargs() > 0) { |
| 189 | RootedScript script(cx, GetOrCreateFunctionScript(cx, fun)); |
| 190 | if (!script) { |
| 191 | return nullptr; |
| 192 | } |
| 193 | |
| 194 | MOZ_ASSERT(fun->nargs() == script->numArgs())do { static_assert( mozilla::detail::AssertionConditionType< decltype(fun->nargs() == script->numArgs())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(fun->nargs() == script->numArgs()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("fun->nargs() == script->numArgs()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 194); AnnotateMozCrashReason("MOZ_ASSERT" "(" "fun->nargs() == script->numArgs()" ")"); do { *((volatile int*)__null) = 194; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 195 | |
| 196 | PositionalFormalParameterIter fi(script); |
| 197 | for (size_t i = 0; i < fun->nargs(); i++, fi++) { |
| 198 | MOZ_ASSERT(fi.argumentSlot() == i)do { static_assert( mozilla::detail::AssertionConditionType< decltype(fi.argumentSlot() == i)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(fi.argumentSlot() == i))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("fi.argumentSlot() == i" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 198); AnnotateMozCrashReason("MOZ_ASSERT" "(" "fi.argumentSlot() == i" ")"); do { *((volatile int*)__null) = 198; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 199 | if (JSAtom* atom = fi.name()) { |
| 200 | // Skip any internal, non-identifier names, like for example ".args". |
| 201 | if (IsIdentifier(atom)) { |
| 202 | cx->markAtom(atom); |
| 203 | names[i].setString(atom); |
| 204 | } |
| 205 | } |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | return NewDenseCopiedArray(cx, names.length(), names.begin()); |
| 210 | } |
| 211 | |
| 212 | bool js::ValueToIdentifier(JSContext* cx, HandleValue v, MutableHandleId id) { |
| 213 | if (!ToPropertyKey(cx, v, id)) { |
| 214 | return false; |
| 215 | } |
| 216 | if (!id.isAtom() || !IsIdentifier(id.toAtom())) { |
| 217 | RootedValue val(cx, v); |
| 218 | ReportValueError(cx, JSMSG_UNEXPECTED_TYPE, JSDVG_SEARCH_STACK1, val, |
| 219 | nullptr, "not an identifier"); |
| 220 | return false; |
| 221 | } |
| 222 | return true; |
| 223 | } |
| 224 | |
| 225 | class js::AutoRestoreRealmDebugMode { |
| 226 | Realm* realm_; |
| 227 | unsigned bits_; |
| 228 | |
| 229 | public: |
| 230 | explicit AutoRestoreRealmDebugMode(Realm* realm) |
| 231 | : realm_(realm), bits_(realm->debugModeBits_) { |
| 232 | MOZ_ASSERT(realm_)do { static_assert( mozilla::detail::AssertionConditionType< decltype(realm_)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(realm_))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("realm_", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 232); AnnotateMozCrashReason("MOZ_ASSERT" "(" "realm_" ")") ; do { *((volatile int*)__null) = 232; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 233 | } |
| 234 | |
| 235 | ~AutoRestoreRealmDebugMode() { |
| 236 | if (realm_) { |
| 237 | realm_->debugModeBits_ = bits_; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | void release() { realm_ = nullptr; } |
| 242 | }; |
| 243 | |
| 244 | /* static */ |
| 245 | bool DebugAPI::slowPathCheckNoExecute(JSContext* cx, HandleScript script) { |
| 246 | MOZ_ASSERT(cx->realm()->isDebuggee())do { static_assert( mozilla::detail::AssertionConditionType< decltype(cx->realm()->isDebuggee())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(cx->realm()->isDebuggee ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("cx->realm()->isDebuggee()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 246); AnnotateMozCrashReason("MOZ_ASSERT" "(" "cx->realm()->isDebuggee()" ")"); do { *((volatile int*)__null) = 246; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 247 | MOZ_ASSERT(cx->noExecuteDebuggerTop)do { static_assert( mozilla::detail::AssertionConditionType< decltype(cx->noExecuteDebuggerTop)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(cx->noExecuteDebuggerTop) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("cx->noExecuteDebuggerTop" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 247); AnnotateMozCrashReason("MOZ_ASSERT" "(" "cx->noExecuteDebuggerTop" ")"); do { *((volatile int*)__null) = 247; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 248 | return EnterDebuggeeNoExecute::reportIfFoundInStack(cx, script); |
| 249 | } |
| 250 | |
| 251 | static void PropagateForcedReturn(JSContext* cx, AbstractFramePtr frame, |
| 252 | HandleValue rval) { |
| 253 | // The Debugger's hooks may return a value that affects the completion |
| 254 | // value of the given frame. For example, a hook may return `{ return: 42 }` |
| 255 | // to terminate the frame and return `42` as the final frame result. |
| 256 | // To accomplish this, the debugger treats these return values as if |
| 257 | // execution of the JS function has been terminated without a pending |
| 258 | // exception, but with a special flag. When the error is handled by the |
| 259 | // interpreter or JIT, the special flag and the error state will be cleared |
| 260 | // and execution will continue from the end of the frame. |
| 261 | MOZ_ASSERT(!cx->isExceptionPending())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!cx->isExceptionPending())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!cx->isExceptionPending() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!cx->isExceptionPending()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 261); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!cx->isExceptionPending()" ")"); do { *((volatile int*)__null) = 261; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 262 | cx->setPropagatingForcedReturn(); |
| 263 | frame.setReturnValue(rval); |
| 264 | } |
| 265 | |
| 266 | [[nodiscard]] static bool AdjustGeneratorResumptionValue(JSContext* cx, |
| 267 | AbstractFramePtr frame, |
| 268 | ResumeMode& resumeMode, |
| 269 | MutableHandleValue vp); |
| 270 | |
| 271 | [[nodiscard]] static bool ApplyFrameResumeMode(JSContext* cx, |
| 272 | AbstractFramePtr frame, |
| 273 | ResumeMode resumeMode, |
| 274 | HandleValue rv, |
| 275 | Handle<SavedFrame*> exnStack) { |
| 276 | RootedValue rval(cx, rv); |
| 277 | |
| 278 | // The value passed in here is unwrapped and has no guarantees about what |
| 279 | // compartment it may be associated with, so we explicitly wrap it into the |
| 280 | // debuggee compartment. |
| 281 | if (!cx->compartment()->wrap(cx, &rval)) { |
| 282 | return false; |
| 283 | } |
| 284 | |
| 285 | if (!AdjustGeneratorResumptionValue(cx, frame, resumeMode, &rval)) { |
| 286 | return false; |
| 287 | } |
| 288 | |
| 289 | switch (resumeMode) { |
| 290 | case ResumeMode::Continue: |
| 291 | break; |
| 292 | |
| 293 | case ResumeMode::Throw: |
| 294 | // If we have a stack from the original throw, use it instead of |
| 295 | // associating the throw with the current execution point. |
| 296 | if (exnStack) { |
| 297 | cx->setPendingException(rval, exnStack); |
| 298 | } else { |
| 299 | cx->setPendingException(rval, ShouldCaptureStack::Always); |
| 300 | } |
| 301 | return false; |
| 302 | |
| 303 | case ResumeMode::Terminate: |
| 304 | cx->reportUncatchableException(); |
| 305 | return false; |
| 306 | |
| 307 | case ResumeMode::Return: |
| 308 | PropagateForcedReturn(cx, frame, rval); |
| 309 | return false; |
| 310 | |
| 311 | default: |
| 312 | MOZ_CRASH("bad Debugger::onEnterFrame resume mode")do { do { } while (false); MOZ_ReportCrash("" "bad Debugger::onEnterFrame resume mode" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 312); AnnotateMozCrashReason("MOZ_CRASH(" "bad Debugger::onEnterFrame resume mode" ")"); do { *((volatile int*)__null) = 312; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 313 | } |
| 314 | |
| 315 | return true; |
| 316 | } |
| 317 | static bool ApplyFrameResumeMode(JSContext* cx, AbstractFramePtr frame, |
| 318 | ResumeMode resumeMode, HandleValue rval) { |
| 319 | Rooted<SavedFrame*> nullStack(cx); |
| 320 | return ApplyFrameResumeMode(cx, frame, resumeMode, rval, nullStack); |
| 321 | } |
| 322 | |
| 323 | bool js::ValueToStableChars(JSContext* cx, const char* fnname, |
| 324 | HandleValue value, |
| 325 | AutoStableStringChars& stableChars) { |
| 326 | if (!value.isString()) { |
| 327 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 328 | JSMSG_NOT_EXPECTED_TYPE, fnname, "string", |
| 329 | InformalValueTypeName(value)); |
| 330 | return false; |
| 331 | } |
| 332 | Rooted<JSLinearString*> linear(cx, value.toString()->ensureLinear(cx)); |
| 333 | if (!linear) { |
| 334 | return false; |
| 335 | } |
| 336 | if (!stableChars.initTwoByte(cx, linear)) { |
| 337 | return false; |
| 338 | } |
| 339 | return true; |
| 340 | } |
| 341 | |
| 342 | bool EvalOptions::setFilename(JSContext* cx, const char* filename) { |
| 343 | JS::UniqueChars copy; |
| 344 | if (filename) { |
| 345 | copy = DuplicateString(cx, filename); |
| 346 | if (!copy) { |
| 347 | return false; |
| 348 | } |
| 349 | } |
| 350 | |
| 351 | filename_ = std::move(copy); |
| 352 | return true; |
| 353 | } |
| 354 | |
| 355 | bool js::ParseEvalOptions(JSContext* cx, HandleValue value, |
| 356 | EvalOptions& options) { |
| 357 | if (!value.isObject()) { |
| 358 | return true; |
| 359 | } |
| 360 | |
| 361 | RootedObject opts(cx, &value.toObject()); |
| 362 | |
| 363 | RootedValue v(cx); |
| 364 | if (!JS_GetProperty(cx, opts, "url", &v)) { |
| 365 | return false; |
| 366 | } |
| 367 | if (!v.isUndefined()) { |
| 368 | RootedString url_str(cx, ToString<CanGC>(cx, v)); |
| 369 | if (!url_str) { |
| 370 | return false; |
| 371 | } |
| 372 | UniqueChars url_bytes = JS_EncodeStringToUTF8(cx, url_str); |
| 373 | if (!url_bytes) { |
| 374 | return false; |
| 375 | } |
| 376 | if (!options.setFilename(cx, url_bytes.get())) { |
| 377 | return false; |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | if (!JS_GetProperty(cx, opts, "lineNumber", &v)) { |
| 382 | return false; |
| 383 | } |
| 384 | if (!v.isUndefined()) { |
| 385 | uint32_t lineno; |
| 386 | if (!ToUint32(cx, v, &lineno)) { |
| 387 | return false; |
| 388 | } |
| 389 | options.setLineno(lineno); |
| 390 | } |
| 391 | |
| 392 | if (!JS_GetProperty(cx, opts, "hideFromDebugger", &v)) { |
| 393 | return false; |
| 394 | } |
| 395 | options.setHideFromDebugger(ToBoolean(v)); |
| 396 | |
| 397 | if (options.kind() == EvalOptions::EnvKind::GlobalWithExtraOuterBindings) { |
| 398 | if (!JS_GetProperty(cx, opts, "useInnerBindings", &v)) { |
| 399 | return false; |
| 400 | } |
| 401 | if (ToBoolean(v)) { |
| 402 | options.setUseInnerBindings(); |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | return true; |
| 407 | } |
| 408 | |
| 409 | /*** Breakpoints ************************************************************/ |
| 410 | |
| 411 | bool BreakpointSite::isEmpty() const { return breakpoints.isEmpty(); } |
| 412 | |
| 413 | void BreakpointSite::trace(JSTracer* trc) { |
| 414 | for (auto p = breakpoints.begin(); p; p++) { |
| 415 | p->trace(trc); |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | void BreakpointSite::finalize(JS::GCContext* gcx) { |
| 420 | while (!breakpoints.isEmpty()) { |
| 421 | breakpoints.begin()->delete_(gcx); |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | Breakpoint* BreakpointSite::firstBreakpoint() const { |
| 426 | if (isEmpty()) { |
| 427 | return nullptr; |
| 428 | } |
| 429 | return &(*breakpoints.begin()); |
| 430 | } |
| 431 | |
| 432 | bool BreakpointSite::hasBreakpoint(Breakpoint* toFind) { |
| 433 | const BreakpointList::Iterator bp(toFind); |
| 434 | for (auto p = breakpoints.begin(); p; p++) { |
| 435 | if (p == bp) { |
| 436 | return true; |
| 437 | } |
| 438 | } |
| 439 | return false; |
| 440 | } |
| 441 | |
| 442 | Breakpoint::Breakpoint(Debugger* debugger, HandleObject wrappedDebugger, |
| 443 | BreakpointSite* site, HandleObject handler) |
| 444 | : debugger(debugger), |
| 445 | wrappedDebugger(wrappedDebugger), |
| 446 | site(site), |
| 447 | handler(handler) { |
| 448 | MOZ_ASSERT(UncheckedUnwrap(wrappedDebugger) == debugger->object)do { static_assert( mozilla::detail::AssertionConditionType< decltype(UncheckedUnwrap(wrappedDebugger) == debugger->object )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(UncheckedUnwrap(wrappedDebugger) == debugger->object ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "UncheckedUnwrap(wrappedDebugger) == debugger->object", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 448); AnnotateMozCrashReason("MOZ_ASSERT" "(" "UncheckedUnwrap(wrappedDebugger) == debugger->object" ")"); do { *((volatile int*)__null) = 448; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 449 | MOZ_ASSERT(handler->compartment() == wrappedDebugger->compartment())do { static_assert( mozilla::detail::AssertionConditionType< decltype(handler->compartment() == wrappedDebugger->compartment ())>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(handler->compartment() == wrappedDebugger->compartment ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("handler->compartment() == wrappedDebugger->compartment()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 449); AnnotateMozCrashReason("MOZ_ASSERT" "(" "handler->compartment() == wrappedDebugger->compartment()" ")"); do { *((volatile int*)__null) = 449; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 450 | |
| 451 | debugger->breakpoints.pushBack(this); |
| 452 | site->breakpoints.pushBack(this); |
| 453 | } |
| 454 | |
| 455 | void Breakpoint::trace(JSTracer* trc) { |
| 456 | TraceEdge(trc, &wrappedDebugger, "breakpoint owner"); |
| 457 | TraceEdge(trc, &handler, "breakpoint handler"); |
| 458 | } |
| 459 | |
| 460 | void Breakpoint::delete_(JS::GCContext* gcx) { |
| 461 | debugger->breakpoints.remove(this); |
| 462 | site->breakpoints.remove(this); |
| 463 | gc::Cell* cell = site->owningCell(); |
| 464 | gcx->delete_(cell, this, MemoryUse::Breakpoint); |
| 465 | } |
| 466 | |
| 467 | void Breakpoint::remove(JS::GCContext* gcx) { |
| 468 | BreakpointSite* savedSite = site; |
| 469 | delete_(gcx); |
| 470 | |
| 471 | savedSite->destroyIfEmpty(gcx); |
| 472 | } |
| 473 | |
| 474 | Breakpoint* Breakpoint::nextInDebugger() { return debuggerLink.mNext; } |
| 475 | |
| 476 | Breakpoint* Breakpoint::nextInSite() { return siteLink.mNext; } |
| 477 | |
| 478 | JSBreakpointSite::JSBreakpointSite(JSScript* script, jsbytecode* pc) |
| 479 | : script(script), pc(pc) { |
| 480 | MOZ_ASSERT(!DebugAPI::hasBreakpointsAt(script, pc))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!DebugAPI::hasBreakpointsAt(script, pc))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(!DebugAPI::hasBreakpointsAt(script, pc)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!DebugAPI::hasBreakpointsAt(script, pc)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 480); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!DebugAPI::hasBreakpointsAt(script, pc)" ")"); do { *((volatile int*)__null) = 480; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 481 | } |
| 482 | |
| 483 | void JSBreakpointSite::remove(JS::GCContext* gcx) { |
| 484 | DebugScript::destroyBreakpointSite(gcx, script, pc); |
| 485 | } |
| 486 | |
| 487 | void JSBreakpointSite::trace(JSTracer* trc) { |
| 488 | BreakpointSite::trace(trc); |
| 489 | TraceEdge(trc, &script, "breakpoint script"); |
| 490 | } |
| 491 | |
| 492 | void JSBreakpointSite::delete_(JS::GCContext* gcx) { |
| 493 | BreakpointSite::finalize(gcx); |
| 494 | |
| 495 | gcx->delete_(script, this, MemoryUse::BreakpointSite); |
| 496 | } |
| 497 | |
| 498 | gc::Cell* JSBreakpointSite::owningCell() { return script; } |
| 499 | |
| 500 | Realm* JSBreakpointSite::realm() const { return script->realm(); } |
| 501 | |
| 502 | WasmBreakpointSite::WasmBreakpointSite(WasmInstanceObject* instanceObject_, |
| 503 | uint32_t offset_) |
| 504 | : instanceObject(instanceObject_), offset(offset_) { |
| 505 | MOZ_ASSERT(instanceObject_)do { static_assert( mozilla::detail::AssertionConditionType< decltype(instanceObject_)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(instanceObject_))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("instanceObject_" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 505); AnnotateMozCrashReason("MOZ_ASSERT" "(" "instanceObject_" ")"); do { *((volatile int*)__null) = 505; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 506 | MOZ_ASSERT(instanceObject_->instance().debugEnabled())do { static_assert( mozilla::detail::AssertionConditionType< decltype(instanceObject_->instance().debugEnabled())>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(instanceObject_->instance().debugEnabled()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("instanceObject_->instance().debugEnabled()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 506); AnnotateMozCrashReason("MOZ_ASSERT" "(" "instanceObject_->instance().debugEnabled()" ")"); do { *((volatile int*)__null) = 506; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 507 | } |
| 508 | |
| 509 | void WasmBreakpointSite::trace(JSTracer* trc) { |
| 510 | BreakpointSite::trace(trc); |
| 511 | TraceEdge(trc, &instanceObject, "breakpoint Wasm instance"); |
| 512 | } |
| 513 | |
| 514 | void WasmBreakpointSite::remove(JS::GCContext* gcx) { |
| 515 | instanceObject->instance().destroyBreakpointSite(gcx, offset); |
| 516 | } |
| 517 | |
| 518 | void WasmBreakpointSite::delete_(JS::GCContext* gcx) { |
| 519 | BreakpointSite::finalize(gcx); |
| 520 | |
| 521 | gcx->delete_(instanceObject, this, MemoryUse::BreakpointSite); |
| 522 | } |
| 523 | |
| 524 | gc::Cell* WasmBreakpointSite::owningCell() { return instanceObject; } |
| 525 | |
| 526 | Realm* WasmBreakpointSite::realm() const { return instanceObject->realm(); } |
| 527 | |
| 528 | /*** Debugger hook dispatch *************************************************/ |
| 529 | |
| 530 | Debugger::Debugger(JSContext* cx, NativeObject* dbg) |
| 531 | : object(dbg), |
| 532 | debuggees(cx->zone()), |
| 533 | uncaughtExceptionHook(nullptr), |
| 534 | allowUnobservedAsmJS(false), |
| 535 | allowUnobservedWasm(false), |
| 536 | exclusiveDebuggerOnEval(false), |
| 537 | inspectNativeCallArguments(false), |
| 538 | collectCoverageInfo(false), |
| 539 | shouldAvoidSideEffects(false), |
| 540 | observedGCs(cx->zone()), |
| 541 | allocationsLog(cx), |
| 542 | trackingAllocationSites(false), |
| 543 | allocationSamplingProbability(1.0), |
| 544 | maxAllocationsLogLength(DEFAULT_MAX_LOG_LENGTH), |
| 545 | allocationsLogOverflowed(false), |
| 546 | frames(cx->zone()), |
| 547 | generatorFrames(cx), |
| 548 | scripts(cx), |
| 549 | sources(cx), |
| 550 | objects(cx), |
| 551 | environments(cx), |
| 552 | wasmInstanceScripts(cx), |
| 553 | wasmInstanceSources(cx) { |
| 554 | cx->check(dbg); |
| 555 | |
| 556 | cx->runtime()->debuggerList().insertBack(this); |
| 557 | } |
| 558 | |
| 559 | template <typename ElementAccess> |
| 560 | static void RemoveDebuggerEntry( |
| 561 | mozilla::DoublyLinkedList<Debugger, ElementAccess>& list, Debugger* dbg) { |
| 562 | // The "probably" here is because there could technically be multiple lists |
| 563 | // with this type signature and theoretically the debugger could be an entry |
| 564 | // in a different one. That is not actually possible however because there |
| 565 | // is only one list the debugger could be in. |
| 566 | if (list.ElementProbablyInList(dbg)) { |
| 567 | list.remove(dbg); |
| 568 | } |
| 569 | } |
| 570 | |
| 571 | Debugger::~Debugger() { |
| 572 | MOZ_ASSERT(debuggees.empty())do { static_assert( mozilla::detail::AssertionConditionType< decltype(debuggees.empty())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(debuggees.empty()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("debuggees.empty()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 572); AnnotateMozCrashReason("MOZ_ASSERT" "(" "debuggees.empty()" ")"); do { *((volatile int*)__null) = 572; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 573 | allocationsLog.clear(); |
| 574 | |
| 575 | // Breakpoints should hold us alive, so any breakpoints remaining must be set |
| 576 | // in dying JSScripts. We should clean them up, but this never asserts. I'm |
| 577 | // not sure why. |
| 578 | MOZ_ASSERT(breakpoints.isEmpty())do { static_assert( mozilla::detail::AssertionConditionType< decltype(breakpoints.isEmpty())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(breakpoints.isEmpty()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("breakpoints.isEmpty()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 578); AnnotateMozCrashReason("MOZ_ASSERT" "(" "breakpoints.isEmpty()" ")"); do { *((volatile int*)__null) = 578; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 579 | |
| 580 | // We don't have to worry about locking here since Debugger is not |
| 581 | // background finalized. |
| 582 | JSContext* cx = TlsContext.get(); |
| 583 | RemoveDebuggerEntry(cx->runtime()->onNewGlobalObjectWatchers(), this); |
| 584 | RemoveDebuggerEntry(cx->runtime()->onGarbageCollectionWatchers(), this); |
| 585 | } |
| 586 | |
| 587 | #ifdef DEBUG1 |
| 588 | /* static */ |
| 589 | bool Debugger::isChildJSObject(JSObject* obj) { |
| 590 | return obj->getClass() == &DebuggerFrame::class_ || |
| 591 | obj->getClass() == &DebuggerScript::class_ || |
| 592 | obj->getClass() == &DebuggerSource::class_ || |
| 593 | obj->getClass() == &DebuggerObject::class_ || |
| 594 | obj->getClass() == &DebuggerEnvironment::class_; |
| 595 | } |
| 596 | #endif |
| 597 | |
| 598 | bool Debugger::hasMemory() const { |
| 599 | return object->getReservedSlot(JSSLOT_DEBUG_MEMORY_INSTANCE).isObject(); |
| 600 | } |
| 601 | |
| 602 | DebuggerMemory& Debugger::memory() const { |
| 603 | MOZ_ASSERT(hasMemory())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hasMemory())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hasMemory()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("hasMemory()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 603); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hasMemory()" ")"); do { *((volatile int*)__null) = 603; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 604 | return object->getReservedSlot(JSSLOT_DEBUG_MEMORY_INSTANCE) |
| 605 | .toObject() |
| 606 | .as<DebuggerMemory>(); |
| 607 | } |
| 608 | |
| 609 | /*** Debugger accessors *******************************************************/ |
| 610 | |
| 611 | bool Debugger::getFrame(JSContext* cx, const FrameIter& iter, |
| 612 | MutableHandleValue vp) { |
| 613 | Rooted<DebuggerFrame*> result(cx); |
| 614 | if (!Debugger::getFrame(cx, iter, &result)) { |
| 615 | return false; |
| 616 | } |
| 617 | vp.setObject(*result); |
| 618 | return true; |
| 619 | } |
| 620 | |
| 621 | bool Debugger::getFrame(JSContext* cx, MutableHandle<DebuggerFrame*> result) { |
| 622 | RootedObject proto( |
| 623 | cx, &object->getReservedSlot(JSSLOT_DEBUG_FRAME_PROTO).toObject()); |
| 624 | Rooted<NativeObject*> debugger(cx, object); |
| 625 | |
| 626 | // Since there is no frame/generator data to associate with this frame, this |
| 627 | // will create a new, "terminated" Debugger.Frame object. |
| 628 | Rooted<DebuggerFrame*> frame( |
| 629 | cx, DebuggerFrame::create(cx, proto, debugger, nullptr, nullptr)); |
| 630 | if (!frame) { |
| 631 | return false; |
| 632 | } |
| 633 | |
| 634 | result.set(frame); |
| 635 | return true; |
| 636 | } |
| 637 | |
| 638 | bool Debugger::getFrame(JSContext* cx, const FrameIter& iter, |
| 639 | MutableHandle<DebuggerFrame*> result) { |
| 640 | AbstractFramePtr referent = iter.abstractFramePtr(); |
| 641 | MOZ_ASSERT_IF(referent.hasScript(), !referent.script()->selfHosted())do { if (referent.hasScript()) { do { static_assert( mozilla:: detail::AssertionConditionType<decltype(!referent.script() ->selfHosted())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!referent.script()->selfHosted ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!referent.script()->selfHosted()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 641); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!referent.script()->selfHosted()" ")"); do { *((volatile int*)__null) = 641; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 642 | |
| 643 | FrameMap::AddPtr p = frames.lookupForAdd(referent); |
| 644 | if (!p) { |
| 645 | Rooted<AbstractGeneratorObject*> genObj(cx); |
| 646 | if (referent.isGeneratorFrame()) { |
| 647 | if (referent.isFunctionFrame()) { |
| 648 | AutoRealm ar(cx, referent.callee()); |
| 649 | genObj = GetGeneratorObjectForFrame(cx, referent); |
| 650 | } else { |
| 651 | MOZ_ASSERT(referent.isModuleFrame())do { static_assert( mozilla::detail::AssertionConditionType< decltype(referent.isModuleFrame())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(referent.isModuleFrame()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("referent.isModuleFrame()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 651); AnnotateMozCrashReason("MOZ_ASSERT" "(" "referent.isModuleFrame()" ")"); do { *((volatile int*)__null) = 651; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 652 | AutoRealm ar(cx, referent.script()->module()); |
| 653 | genObj = GetGeneratorObjectForFrame(cx, referent); |
| 654 | } |
| 655 | |
| 656 | // If this frame has a generator associated with it, but no on-stack |
| 657 | // Debugger.Frame object was found, there should not be a suspended |
| 658 | // Debugger.Frame either because otherwise slowPathOnResumeFrame would |
| 659 | // have already populated the "frames" map with a Debugger.Frame. |
| 660 | MOZ_ASSERT_IF(genObj, !generatorFrames.has(genObj))do { if (genObj) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(!generatorFrames.has(genObj))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!generatorFrames.has(genObj) ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!generatorFrames.has(genObj)", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 660); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!generatorFrames.has(genObj)" ")"); do { *((volatile int*)__null) = 660; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 661 | |
| 662 | // If the frame's generator is closed, there is no way to associate the |
| 663 | // generator with the frame successfully because there is no way to |
| 664 | // get the generator's callee script, and even if we could, having it |
| 665 | // there would in no way affect the behavior of the frame. |
| 666 | if (genObj && genObj->isClosed()) { |
| 667 | genObj = nullptr; |
| 668 | } |
| 669 | |
| 670 | // If no AbstractGeneratorObject exists yet, we create a Debugger.Frame |
| 671 | // below anyway, and Debugger::onNewGenerator() will associate it |
| 672 | // with the AbstractGeneratorObject later when we hit JSOp::Generator. |
| 673 | } |
| 674 | |
| 675 | // Create and populate the Debugger.Frame object. |
| 676 | RootedObject proto( |
| 677 | cx, &object->getReservedSlot(JSSLOT_DEBUG_FRAME_PROTO).toObject()); |
| 678 | Rooted<NativeObject*> debugger(cx, object); |
| 679 | |
| 680 | Rooted<DebuggerFrame*> frame( |
| 681 | cx, DebuggerFrame::create(cx, proto, debugger, &iter, genObj)); |
| 682 | if (!frame) { |
| 683 | return false; |
| 684 | } |
| 685 | |
| 686 | auto terminateDebuggerFrameGuard = MakeScopeExit([&] { |
| 687 | terminateDebuggerFrame(cx->gcContext(), this, frame, referent); |
| 688 | }); |
| 689 | |
| 690 | if (genObj) { |
| 691 | DependentAddPtr<GeneratorWeakMap> genPtr(cx, generatorFrames, genObj); |
| 692 | if (!genPtr.add(cx, generatorFrames, genObj, frame)) { |
| 693 | return false; |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | if (!ensureExecutionObservabilityOfFrame(cx, referent)) { |
| 698 | return false; |
| 699 | } |
| 700 | |
| 701 | if (!frames.add(p, referent, frame)) { |
| 702 | ReportOutOfMemory(cx); |
| 703 | return false; |
| 704 | } |
| 705 | |
| 706 | terminateDebuggerFrameGuard.release(); |
| 707 | } |
| 708 | |
| 709 | result.set(p->value()); |
| 710 | return true; |
| 711 | } |
| 712 | |
| 713 | bool Debugger::getFrame(JSContext* cx, Handle<AbstractGeneratorObject*> genObj, |
| 714 | MutableHandle<DebuggerFrame*> result) { |
| 715 | // To create a Debugger.Frame for a running generator, we'd also need a |
| 716 | // FrameIter for its stack frame. We could make this work by searching the |
| 717 | // stack for the generator's frame, but for the moment, we only need this |
| 718 | // function to handle generators we've found on promises' reaction records, |
| 719 | // which should always be suspended. |
| 720 | MOZ_ASSERT(genObj->isSuspended())do { static_assert( mozilla::detail::AssertionConditionType< decltype(genObj->isSuspended())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(genObj->isSuspended()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("genObj->isSuspended()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 720); AnnotateMozCrashReason("MOZ_ASSERT" "(" "genObj->isSuspended()" ")"); do { *((volatile int*)__null) = 720; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 721 | |
| 722 | // Do we have an existing Debugger.Frame for this generator? |
| 723 | DependentAddPtr<GeneratorWeakMap> p(cx, generatorFrames, genObj); |
| 724 | if (p) { |
| 725 | MOZ_ASSERT(&p->value()->unwrappedGenerator() == genObj)do { static_assert( mozilla::detail::AssertionConditionType< decltype(&p->value()->unwrappedGenerator() == genObj )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(&p->value()->unwrappedGenerator() == genObj ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "&p->value()->unwrappedGenerator() == genObj", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 725); AnnotateMozCrashReason("MOZ_ASSERT" "(" "&p->value()->unwrappedGenerator() == genObj" ")"); do { *((volatile int*)__null) = 725; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 726 | result.set(p->value()); |
| 727 | return true; |
| 728 | } |
| 729 | |
| 730 | // Create a new Debugger.Frame. |
| 731 | RootedObject proto( |
| 732 | cx, &object->getReservedSlot(JSSLOT_DEBUG_FRAME_PROTO).toObject()); |
| 733 | Rooted<NativeObject*> debugger(cx, object); |
| 734 | |
| 735 | result.set(DebuggerFrame::create(cx, proto, debugger, nullptr, genObj)); |
| 736 | if (!result) { |
| 737 | return false; |
| 738 | } |
| 739 | |
| 740 | if (!p.add(cx, generatorFrames, genObj, result)) { |
| 741 | terminateDebuggerFrame(cx->gcContext(), this, result, NullFramePtr()); |
| 742 | return false; |
| 743 | } |
| 744 | |
| 745 | return true; |
| 746 | } |
| 747 | |
| 748 | static bool DebuggerExists( |
| 749 | GlobalObject* global, const std::function<bool(Debugger* dbg)>& predicate) { |
| 750 | // The GC analysis can't determine that the predicate can't GC, so let it know |
| 751 | // explicitly. |
| 752 | JS::AutoSuppressGCAnalysis nogc; |
| 753 | |
| 754 | for (Realm::DebuggerVectorEntry& entry : global->getDebuggers(nogc)) { |
| 755 | // Callbacks should not create new references to the debugger, so don't |
| 756 | // use a barrier. This allows this method to be called during GC. |
| 757 | if (predicate(entry.dbg.unbarrieredGet())) { |
| 758 | return true; |
| 759 | } |
| 760 | } |
| 761 | return false; |
| 762 | } |
| 763 | |
| 764 | /* static */ |
| 765 | bool Debugger::hasLiveHook(GlobalObject* global, Hook which) { |
| 766 | return DebuggerExists(global, |
| 767 | [=](Debugger* dbg) { return dbg->getHook(which); }); |
| 768 | } |
| 769 | |
| 770 | /* static */ |
| 771 | bool DebugAPI::debuggerObservesAllExecution(GlobalObject* global) { |
| 772 | return DebuggerExists( |
| 773 | global, [=](Debugger* dbg) { return dbg->observesAllExecution(); }); |
| 774 | } |
| 775 | |
| 776 | /* static */ |
| 777 | bool DebugAPI::debuggerObservesCoverage(GlobalObject* global) { |
| 778 | return DebuggerExists(global, |
| 779 | [=](Debugger* dbg) { return dbg->observesCoverage(); }); |
| 780 | } |
| 781 | |
| 782 | /* static */ |
| 783 | bool DebugAPI::debuggerObservesAsmJS(GlobalObject* global) { |
| 784 | return DebuggerExists(global, |
| 785 | [=](Debugger* dbg) { return dbg->observesAsmJS(); }); |
| 786 | } |
| 787 | |
| 788 | /* static */ |
| 789 | bool DebugAPI::debuggerObservesWasm(GlobalObject* global) { |
| 790 | return DebuggerExists(global, |
| 791 | [=](Debugger* dbg) { return dbg->observesWasm(); }); |
| 792 | } |
| 793 | |
| 794 | /* static */ |
| 795 | bool DebugAPI::debuggerObservesNativeCall(GlobalObject* global) { |
| 796 | return DebuggerExists( |
| 797 | global, [=](Debugger* dbg) { return dbg->observesNativeCalls(); }); |
| 798 | } |
| 799 | |
| 800 | /* static */ |
| 801 | bool DebugAPI::hasExceptionUnwindHook(GlobalObject* global) { |
| 802 | return Debugger::hasLiveHook(global, Debugger::OnExceptionUnwind); |
| 803 | } |
| 804 | |
| 805 | /* static */ |
| 806 | bool DebugAPI::hasDebuggerStatementHook(GlobalObject* global) { |
| 807 | return Debugger::hasLiveHook(global, Debugger::OnDebuggerStatement); |
| 808 | } |
| 809 | |
| 810 | template <typename HookIsEnabledFun /* bool (Debugger*) */> |
| 811 | bool DebuggerList<HookIsEnabledFun>::init(JSContext* cx) { |
| 812 | // Determine which debuggers will receive this event, and in what order. |
| 813 | // Make a copy of the list, since the original is mutable and we will be |
| 814 | // calling into arbitrary JS. |
| 815 | Handle<GlobalObject*> global = cx->global(); |
| 816 | JS::AutoAssertNoGC nogc; |
| 817 | for (Realm::DebuggerVectorEntry& entry : global->getDebuggers(nogc)) { |
| 818 | Debugger* dbg = entry.dbg; |
| 819 | if (dbg->isHookCallAllowed(cx) && hookIsEnabled(dbg)) { |
| 820 | if (!debuggers.append(ObjectValue(*dbg->toJSObject()))) { |
| 821 | return false; |
| 822 | } |
| 823 | } |
| 824 | } |
| 825 | return true; |
| 826 | } |
| 827 | |
| 828 | template <typename HookIsEnabledFun /* bool (Debugger*) */> |
| 829 | template <typename FireHookFun /* bool (Debugger*) */> |
| 830 | bool DebuggerList<HookIsEnabledFun>::dispatchHook(JSContext* cx, |
| 831 | FireHookFun fireHook) { |
| 832 | // Preserve the debuggee's microtask event queue while we run the hooks, so |
| 833 | // the debugger's microtask checkpoints don't run from the debuggee's |
| 834 | // microtasks, and vice versa. |
| 835 | JS::AutoDebuggerJobQueueInterruption adjqi; |
| 836 | if (!adjqi.init(cx)) { |
| 837 | return false; |
| 838 | } |
| 839 | |
| 840 | // Deliver the event to each debugger, checking again to make sure it |
| 841 | // should still be delivered. |
| 842 | Handle<GlobalObject*> global = cx->global(); |
| 843 | for (Value* p = debuggers.begin(); p != debuggers.end(); p++) { |
| 844 | Debugger* dbg = Debugger::fromJSObject(&p->toObject()); |
| 845 | EnterDebuggeeNoExecute nx(cx, *dbg, adjqi); |
| 846 | if (dbg->debuggees.has(global) && hookIsEnabled(dbg)) { |
| 847 | bool result = |
| 848 | dbg->enterDebuggerHook(cx, [&]() -> bool { return fireHook(dbg); }); |
| 849 | adjqi.runJobs(); |
| 850 | if (!result) { |
| 851 | return false; |
| 852 | } |
| 853 | } |
| 854 | } |
| 855 | return true; |
| 856 | } |
| 857 | |
| 858 | template <typename HookIsEnabledFun /* bool (Debugger*) */> |
| 859 | template <typename FireHookFun /* bool (Debugger*) */> |
| 860 | void DebuggerList<HookIsEnabledFun>::dispatchQuietHook(JSContext* cx, |
| 861 | FireHookFun fireHook) { |
| 862 | bool result = |
| 863 | dispatchHook(cx, [&](Debugger* dbg) -> bool { return fireHook(dbg); }); |
| 864 | |
| 865 | // dispatchHook may fail due to OOM. This OOM is not handlable at the |
| 866 | // callsites of dispatchQuietHook in the engine. |
| 867 | if (!result) { |
| 868 | cx->clearPendingException(); |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | template <typename HookIsEnabledFun /* bool (Debugger*) */> |
| 873 | template <typename FireHookFun /* bool (Debugger*, ResumeMode&, MutableHandleValue vp) */> |
| 874 | bool DebuggerList<HookIsEnabledFun>::dispatchResumptionHook( |
| 875 | JSContext* cx, AbstractFramePtr frame, FireHookFun fireHook) { |
| 876 | ResumeMode resumeMode = ResumeMode::Continue; |
| 877 | RootedValue rval(cx); |
| 878 | return dispatchHook(cx, |
| 879 | [&](Debugger* dbg) -> bool { |
| 880 | return fireHook(dbg, resumeMode, &rval); |
| 881 | }) && |
| 882 | ApplyFrameResumeMode(cx, frame, resumeMode, rval); |
| 883 | } |
| 884 | |
| 885 | JSObject* Debugger::getHook(Hook hook) const { |
| 886 | MOZ_ASSERT(hook >= 0 && hook < HookCount)do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook >= 0 && hook < HookCount)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(hook >= 0 && hook < HookCount))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("hook >= 0 && hook < HookCount" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 886); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook >= 0 && hook < HookCount" ")"); do { *((volatile int*)__null) = 886; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 887 | const Value& v = object->getReservedSlot(JSSLOT_DEBUG_HOOK_START + |
| 888 | std::underlying_type_t<Hook>(hook)); |
| 889 | return v.isUndefined() ? nullptr : &v.toObject(); |
| 890 | } |
| 891 | |
| 892 | bool Debugger::hasAnyLiveHooks() const { |
| 893 | // A onNewGlobalObject hook does not hold its Debugger live, so its behavior |
| 894 | // is nondeterministic. This behavior is not satisfying, but it is at least |
| 895 | // documented. |
| 896 | if (getHook(OnDebuggerStatement) || getHook(OnExceptionUnwind) || |
| 897 | getHook(OnNewScript) || getHook(OnEnterFrame)) { |
| 898 | return true; |
| 899 | } |
| 900 | |
| 901 | return false; |
| 902 | } |
| 903 | |
| 904 | /* static */ |
| 905 | bool DebugAPI::slowPathOnEnterFrame(JSContext* cx, AbstractFramePtr frame) { |
| 906 | #ifdef MOZ_EXECUTION_TRACING1 |
| 907 | if (cx->hasExecutionTracer()) { |
| 908 | cx->getExecutionTracer().onEnterFrame(cx, frame); |
| 909 | } |
| 910 | #endif |
| 911 | return Debugger::dispatchResumptionHook( |
| 912 | cx, frame, |
| 913 | [frame](Debugger* dbg) -> bool { |
| 914 | return dbg->observesFrame(frame) && dbg->observesEnterFrame(); |
| 915 | }, |
| 916 | [&](Debugger* dbg, ResumeMode& resumeMode, MutableHandleValue vp) |
| 917 | -> bool { return dbg->fireEnterFrame(cx, resumeMode, vp); }); |
| 918 | } |
| 919 | |
| 920 | /* static */ |
| 921 | bool DebugAPI::slowPathOnResumeFrame(JSContext* cx, AbstractFramePtr frame) { |
| 922 | #ifdef MOZ_EXECUTION_TRACING1 |
| 923 | if (cx->hasExecutionTracer()) { |
| 924 | cx->getExecutionTracer().onEnterFrame(cx, frame); |
| 925 | } |
| 926 | #endif |
| 927 | // Don't count on this method to be called every time a generator is |
| 928 | // resumed! This is called only if the frame's debuggee bit is set, |
| 929 | // i.e. the script has breakpoints or the frame is stepping. |
| 930 | MOZ_ASSERT(frame.isGeneratorFrame())do { static_assert( mozilla::detail::AssertionConditionType< decltype(frame.isGeneratorFrame())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(frame.isGeneratorFrame()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("frame.isGeneratorFrame()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 930); AnnotateMozCrashReason("MOZ_ASSERT" "(" "frame.isGeneratorFrame()" ")"); do { *((volatile int*)__null) = 930; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 931 | MOZ_ASSERT(frame.isDebuggee())do { static_assert( mozilla::detail::AssertionConditionType< decltype(frame.isDebuggee())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(frame.isDebuggee()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("frame.isDebuggee()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 931); AnnotateMozCrashReason("MOZ_ASSERT" "(" "frame.isDebuggee()" ")"); do { *((volatile int*)__null) = 931; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 932 | |
| 933 | Rooted<AbstractGeneratorObject*> genObj( |
| 934 | cx, GetGeneratorObjectForFrame(cx, frame)); |
| 935 | MOZ_ASSERT(genObj)do { static_assert( mozilla::detail::AssertionConditionType< decltype(genObj)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(genObj))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("genObj", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 935); AnnotateMozCrashReason("MOZ_ASSERT" "(" "genObj" ")") ; do { *((volatile int*)__null) = 935; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 936 | |
| 937 | // If there is an OOM, we mark all of the Debugger.Frame objects terminated |
| 938 | // because we want to ensure that none of the frames are in a partially |
| 939 | // initialized state where they are in "generatorFrames" but not "frames". |
| 940 | auto terminateDebuggerFramesGuard = MakeScopeExit([&] { |
| 941 | Debugger::terminateDebuggerFrames(cx, frame); |
| 942 | |
| 943 | MOZ_ASSERT(!DebugAPI::inFrameMaps(frame))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!DebugAPI::inFrameMaps(frame))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!DebugAPI::inFrameMaps(frame )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!DebugAPI::inFrameMaps(frame)", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 943); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!DebugAPI::inFrameMaps(frame)" ")"); do { *((volatile int*)__null) = 943; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 944 | }); |
| 945 | |
| 946 | // For each debugger, if there is an existing Debugger.Frame object for the |
| 947 | // resumed `frame`, update it with the new frame pointer and make sure the |
| 948 | // frame is observable. |
| 949 | FrameIter iter(cx); |
| 950 | MOZ_ASSERT(iter.abstractFramePtr() == frame)do { static_assert( mozilla::detail::AssertionConditionType< decltype(iter.abstractFramePtr() == frame)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(iter.abstractFramePtr() == frame ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "iter.abstractFramePtr() == frame", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 950); AnnotateMozCrashReason("MOZ_ASSERT" "(" "iter.abstractFramePtr() == frame" ")"); do { *((volatile int*)__null) = 950; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 951 | { |
| 952 | JS::AutoAssertNoGC nogc; |
| 953 | for (Realm::DebuggerVectorEntry& entry : |
| 954 | frame.global()->getDebuggers(nogc)) { |
| 955 | Debugger* dbg = entry.dbg; |
| 956 | if (Debugger::GeneratorWeakMap::Ptr generatorEntry = |
| 957 | dbg->generatorFrames.lookup(genObj)) { |
| 958 | DebuggerFrame* frameObj = generatorEntry->value(); |
| 959 | MOZ_ASSERT(&frameObj->unwrappedGenerator() == genObj)do { static_assert( mozilla::detail::AssertionConditionType< decltype(&frameObj->unwrappedGenerator() == genObj)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(&frameObj->unwrappedGenerator() == genObj))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("&frameObj->unwrappedGenerator() == genObj" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 959); AnnotateMozCrashReason("MOZ_ASSERT" "(" "&frameObj->unwrappedGenerator() == genObj" ")"); do { *((volatile int*)__null) = 959; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 960 | if (!dbg->frames.putNew(frame, frameObj)) { |
| 961 | ReportOutOfMemory(cx); |
| 962 | return false; |
| 963 | } |
| 964 | if (!frameObj->resume(iter)) { |
| 965 | return false; |
| 966 | } |
| 967 | } |
| 968 | } |
| 969 | } |
| 970 | |
| 971 | terminateDebuggerFramesGuard.release(); |
| 972 | |
| 973 | return slowPathOnEnterFrame(cx, frame); |
| 974 | } |
| 975 | |
| 976 | /* static */ |
| 977 | NativeResumeMode DebugAPI::slowPathOnNativeCall(JSContext* cx, |
| 978 | const CallArgs& args, |
| 979 | CallReason reason) { |
| 980 | if (!cx->realm()->debuggerObservesNativeCall()) { |
| 981 | return NativeResumeMode::Continue; |
| 982 | } |
| 983 | |
| 984 | DebuggerList debuggerList(cx, [](Debugger* dbg) -> bool { |
| 985 | return dbg->getHook(Debugger::OnNativeCall); |
| 986 | }); |
| 987 | |
| 988 | if (!debuggerList.init(cx)) { |
| 989 | return NativeResumeMode::Abort; |
| 990 | } |
| 991 | |
| 992 | if (debuggerList.empty()) { |
| 993 | return NativeResumeMode::Continue; |
| 994 | } |
| 995 | |
| 996 | // The onNativeCall hook is fired when self hosted functions are called, |
| 997 | // and any other self hosted function or C++ native that is directly called |
| 998 | // by the self hosted function is considered to be part of the same |
| 999 | // native call, except for the following 4 cases: |
| 1000 | // |
| 1001 | // * callContentFunction and constructContentFunction, |
| 1002 | // which uses CallReason::CallContent |
| 1003 | // * Function.prototype.call and Function.prototype.apply, |
| 1004 | // which uses CallReason::FunCall |
| 1005 | // * Getter call which uses CallReason::Getter |
| 1006 | // * Setter call which uses CallReason::Setter |
| 1007 | // |
| 1008 | // We check this only after checking that debuggerList has items in order |
| 1009 | // to avoid unnecessary calls to cx->currentScript(), which can be expensive |
| 1010 | // when the top frame is in jitcode. |
| 1011 | JSScript* script = cx->currentScript(); |
| 1012 | if (script && script->selfHosted() && reason != CallReason::CallContent && |
| 1013 | reason != CallReason::FunCall && reason != CallReason::Getter && |
| 1014 | reason != CallReason::Setter) { |
| 1015 | return NativeResumeMode::Continue; |
| 1016 | } |
| 1017 | |
| 1018 | RootedValue rval(cx); |
| 1019 | ResumeMode resumeMode = ResumeMode::Continue; |
| 1020 | bool result = debuggerList.dispatchHook(cx, [&](Debugger* dbg) -> bool { |
| 1021 | return dbg->fireNativeCall(cx, args, reason, resumeMode, &rval); |
| 1022 | }); |
| 1023 | if (!result) { |
| 1024 | return NativeResumeMode::Abort; |
| 1025 | } |
| 1026 | |
| 1027 | // Hook must follow normal native function conventions and not return |
| 1028 | // primitive values. |
| 1029 | if (resumeMode == ResumeMode::Return) { |
| 1030 | if (args.isConstructing() && !rval.isObject()) { |
| 1031 | JS_ReportErrorASCII( |
| 1032 | cx, "onNativeCall hook must return an object for constructor call"); |
| 1033 | return NativeResumeMode::Abort; |
| 1034 | } |
| 1035 | } |
| 1036 | |
| 1037 | // The value is not in any particular compartment, so it needs to be |
| 1038 | // explicitly wrapped into the debuggee compartment. |
| 1039 | if (!cx->compartment()->wrap(cx, &rval)) { |
| 1040 | return NativeResumeMode::Abort; |
| 1041 | } |
| 1042 | |
| 1043 | switch (resumeMode) { |
| 1044 | case ResumeMode::Continue: |
| 1045 | break; |
| 1046 | |
| 1047 | case ResumeMode::Throw: |
| 1048 | cx->setPendingException(rval, ShouldCaptureStack::Always); |
| 1049 | return NativeResumeMode::Abort; |
| 1050 | |
| 1051 | case ResumeMode::Terminate: |
| 1052 | cx->reportUncatchableException(); |
| 1053 | return NativeResumeMode::Abort; |
| 1054 | |
| 1055 | case ResumeMode::Return: |
| 1056 | args.rval().set(rval); |
| 1057 | return NativeResumeMode::Override; |
| 1058 | } |
| 1059 | |
| 1060 | return NativeResumeMode::Continue; |
| 1061 | } |
| 1062 | |
| 1063 | /* static */ |
| 1064 | bool DebugAPI::slowPathShouldAvoidSideEffects(JSContext* cx) { |
| 1065 | return DebuggerExists( |
| 1066 | cx->global(), [=](Debugger* dbg) { return dbg->shouldAvoidSideEffects; }); |
| 1067 | } |
| 1068 | |
| 1069 | /* |
| 1070 | * RAII class to mark a generator as "running" temporarily while running |
| 1071 | * debugger code. |
| 1072 | * |
| 1073 | * When Debugger::slowPathOnLeaveFrame is called for a frame that is yielding |
| 1074 | * or awaiting, its generator is in the "suspended" state. Letting script |
| 1075 | * observe this state, with the generator on stack yet also reenterable, would |
| 1076 | * be bad, so we mark it running while we fire events. |
| 1077 | */ |
| 1078 | class MOZ_RAII AutoSetGeneratorRunning { |
| 1079 | int32_t resumeIndex_; |
| 1080 | AsyncGeneratorObject::State asyncGenState_; |
| 1081 | Rooted<AbstractGeneratorObject*> genObj_; |
| 1082 | |
| 1083 | public: |
| 1084 | AutoSetGeneratorRunning(JSContext* cx, |
| 1085 | Handle<AbstractGeneratorObject*> genObj) |
| 1086 | : resumeIndex_(0), |
| 1087 | asyncGenState_(static_cast<AsyncGeneratorObject::State>(0)), |
| 1088 | genObj_(cx, genObj) { |
| 1089 | if (genObj) { |
| 1090 | if (!genObj->isClosed() && !genObj->isBeforeInitialYield() && |
| 1091 | genObj->isSuspended()) { |
| 1092 | // Yielding or awaiting. |
| 1093 | resumeIndex_ = genObj->resumeIndex(); |
| 1094 | genObj->setRunning(); |
| 1095 | |
| 1096 | // Async generators have additionally bookkeeping which must be |
| 1097 | // adjusted when switching over to the running state. |
| 1098 | if (genObj->is<AsyncGeneratorObject>()) { |
| 1099 | auto* generator = &genObj->as<AsyncGeneratorObject>(); |
| 1100 | asyncGenState_ = generator->state(); |
| 1101 | generator->setExecuting(); |
| 1102 | } |
| 1103 | } else { |
| 1104 | // Returning or throwing. The generator is already closed, if |
| 1105 | // it was ever exposed at all. |
| 1106 | genObj_ = nullptr; |
| 1107 | } |
| 1108 | } |
| 1109 | } |
| 1110 | |
| 1111 | ~AutoSetGeneratorRunning() { |
| 1112 | if (genObj_) { |
| 1113 | MOZ_ASSERT(genObj_->isRunning())do { static_assert( mozilla::detail::AssertionConditionType< decltype(genObj_->isRunning())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(genObj_->isRunning()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("genObj_->isRunning()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1113); AnnotateMozCrashReason("MOZ_ASSERT" "(" "genObj_->isRunning()" ")"); do { *((volatile int*)__null) = 1113; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1114 | genObj_->setResumeIndex(resumeIndex_); |
| 1115 | if (genObj_->is<AsyncGeneratorObject>()) { |
| 1116 | genObj_->as<AsyncGeneratorObject>().setState(asyncGenState_); |
| 1117 | } |
| 1118 | } |
| 1119 | } |
| 1120 | }; |
| 1121 | |
| 1122 | /* |
| 1123 | * Handle leaving a frame with debuggers watching. |frameOk| indicates whether |
| 1124 | * the frame is exiting normally or abruptly. Set |cx|'s exception and/or |
| 1125 | * |cx->fp()|'s return value, and return a new success value. |
| 1126 | */ |
| 1127 | /* static */ |
| 1128 | bool DebugAPI::slowPathOnLeaveFrame(JSContext* cx, AbstractFramePtr frame, |
| 1129 | const jsbytecode* pc, bool frameOk) { |
| 1130 | #ifdef MOZ_EXECUTION_TRACING1 |
| 1131 | if (cx->hasExecutionTracer()) { |
| 1132 | cx->getExecutionTracer().onLeaveFrame(cx, frame); |
| 1133 | } |
| 1134 | #endif |
| 1135 | MOZ_ASSERT_IF(!frame.isWasmDebugFrame(), pc)do { if (!frame.isWasmDebugFrame()) { do { static_assert( mozilla ::detail::AssertionConditionType<decltype(pc)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(pc))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("pc", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1135); AnnotateMozCrashReason("MOZ_ASSERT" "(" "pc" ")"); do { *((volatile int*)__null) = 1135; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); } } while (false ); |
| 1136 | |
| 1137 | mozilla::DebugOnly<Handle<GlobalObject*>> debuggeeGlobal = cx->global(); |
| 1138 | |
| 1139 | // These are updated below, but consulted by the cleanup code we register now, |
| 1140 | // so declare them here, initialized to quiescent values. |
| 1141 | Rooted<Completion> completion(cx); |
| 1142 | bool success = false; |
| 1143 | |
| 1144 | auto frameMapsGuard = MakeScopeExit([&] { |
| 1145 | // Clean up all Debugger.Frame instances on exit. On suspending, pass the |
| 1146 | // flag that says to leave those frames `.live`. Note that if the completion |
| 1147 | // is a suspension but success is false, the generator gets closed, not |
| 1148 | // suspended. |
| 1149 | if (success && completion.get().suspending()) { |
| 1150 | Debugger::suspendGeneratorDebuggerFrames(cx, frame); |
| 1151 | } else { |
| 1152 | Debugger::terminateDebuggerFrames(cx, frame); |
| 1153 | } |
| 1154 | }); |
| 1155 | |
| 1156 | // The onPop handler and associated clean up logic should not run multiple |
| 1157 | // times on the same frame. If slowPathOnLeaveFrame has already been |
| 1158 | // called, the frame will not be present in the Debugger frame maps. |
| 1159 | Rooted<Debugger::DebuggerFrameVector> frames(cx); |
| 1160 | if (!Debugger::getDebuggerFrames(frame, &frames)) { |
| 1161 | // There is at least one match Debugger.Frame we failed to process, so drop |
| 1162 | // the pending exception and raise an out-of-memory instead. |
| 1163 | if (!frameOk) { |
| 1164 | cx->clearPendingException(); |
| 1165 | } |
| 1166 | ReportOutOfMemory(cx); |
| 1167 | return false; |
| 1168 | } |
| 1169 | if (frames.empty()) { |
| 1170 | return frameOk; |
| 1171 | } |
| 1172 | |
| 1173 | // Convert current exception state into a Completion and clear exception off |
| 1174 | // of the JSContext. |
| 1175 | completion = Completion::fromJSFramePop(cx, frame, pc, frameOk); |
| 1176 | |
| 1177 | ResumeMode resumeMode = ResumeMode::Continue; |
| 1178 | RootedValue rval(cx); |
| 1179 | |
| 1180 | { |
| 1181 | // Preserve the debuggee's microtask event queue while we run the hooks, so |
| 1182 | // the debugger's microtask checkpoints don't run from the debuggee's |
| 1183 | // microtasks, and vice versa. |
| 1184 | JS::AutoDebuggerJobQueueInterruption adjqi; |
| 1185 | if (!adjqi.init(cx)) { |
| 1186 | return false; |
| 1187 | } |
| 1188 | |
| 1189 | // This path can be hit via unwinding the stack due to over-recursion or |
| 1190 | // OOM. In those cases, don't fire the frames' onPop handlers, because |
| 1191 | // invoking JS will only trigger the same condition. See |
| 1192 | // slowPathOnExceptionUnwind. |
| 1193 | if (!cx->isThrowingOverRecursed() && !cx->isThrowingOutOfMemory()) { |
| 1194 | Rooted<AbstractGeneratorObject*> genObj( |
| 1195 | cx, frame.isGeneratorFrame() ? GetGeneratorObjectForFrame(cx, frame) |
| 1196 | : nullptr); |
| 1197 | |
| 1198 | // For each Debugger.Frame, fire its onPop handler, if any. |
| 1199 | for (size_t i = 0; i < frames.length(); i++) { |
| 1200 | Handle<DebuggerFrame*> frameobj = frames[i]; |
| 1201 | Debugger* dbg = frameobj->owner(); |
| 1202 | EnterDebuggeeNoExecute nx(cx, *dbg, adjqi); |
| 1203 | |
| 1204 | // Removing a global from a Debugger's debuggee set kills all of that |
| 1205 | // Debugger's D.Fs in that global. This means that one D.F's onPop can |
| 1206 | // kill the next D.F. So we have to check whether frameobj is still "on |
| 1207 | // the stack". |
| 1208 | if (frameobj->isOnStack() && frameobj->onPopHandler()) { |
| 1209 | OnPopHandler* handler = frameobj->onPopHandler(); |
| 1210 | |
| 1211 | bool result = dbg->enterDebuggerHook(cx, [&]() -> bool { |
| 1212 | ResumeMode nextResumeMode = ResumeMode::Continue; |
| 1213 | RootedValue nextValue(cx); |
| 1214 | |
| 1215 | // Call the onPop handler. |
| 1216 | bool success; |
| 1217 | { |
| 1218 | // Mark the generator as running, to prevent reentrance. |
| 1219 | // |
| 1220 | // At certain points in a generator's lifetime, |
| 1221 | // GetGeneratorObjectForFrame can return null even when the |
| 1222 | // generator exists, but at those points the generator has not yet |
| 1223 | // been exposed to JavaScript, so reentrance isn't possible |
| 1224 | // anyway. So there's no harm done if this has no effect in that |
| 1225 | // case. |
| 1226 | AutoSetGeneratorRunning asgr(cx, genObj); |
| 1227 | success = handler->onPop(cx, frameobj, completion, nextResumeMode, |
| 1228 | &nextValue); |
| 1229 | } |
| 1230 | |
| 1231 | return dbg->processParsedHandlerResult(cx, frame, pc, success, |
| 1232 | nextResumeMode, nextValue, |
| 1233 | resumeMode, &rval); |
| 1234 | }); |
| 1235 | adjqi.runJobs(); |
| 1236 | |
| 1237 | if (!result) { |
| 1238 | return false; |
| 1239 | } |
| 1240 | |
| 1241 | // At this point, we are back in the debuggee compartment, and |
| 1242 | // any error has been wrapped up as a completion value. |
| 1243 | MOZ_ASSERT(!cx->isExceptionPending())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!cx->isExceptionPending())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!cx->isExceptionPending() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!cx->isExceptionPending()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1243); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!cx->isExceptionPending()" ")"); do { *((volatile int*)__null) = 1243; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1244 | } |
| 1245 | } |
| 1246 | } |
| 1247 | } |
| 1248 | |
| 1249 | completion.get().updateFromHookResult(resumeMode, rval); |
| 1250 | |
| 1251 | // Now that we've run all the handlers, extract the final resumption mode. */ |
| 1252 | ResumeMode completionResumeMode; |
| 1253 | RootedValue completionValue(cx); |
| 1254 | Rooted<SavedFrame*> completionStack(cx); |
| 1255 | completion.get().toResumeMode(completionResumeMode, &completionValue, |
| 1256 | &completionStack); |
| 1257 | |
| 1258 | // If we are returning the original value used to create the completion, then |
| 1259 | // we don't want to treat the resumption value as a Return completion, because |
| 1260 | // that would cause us to apply AdjustGeneratorResumptionValue to the |
| 1261 | // already-adjusted value that the generator actually returned. |
| 1262 | if (resumeMode == ResumeMode::Continue && |
| 1263 | completionResumeMode == ResumeMode::Return) { |
| 1264 | completionResumeMode = ResumeMode::Continue; |
| 1265 | } |
| 1266 | |
| 1267 | if (!ApplyFrameResumeMode(cx, frame, completionResumeMode, completionValue, |
| 1268 | completionStack)) { |
| 1269 | if (!cx->isPropagatingForcedReturn()) { |
| 1270 | // If this is an exception or termination, we just propagate that along. |
| 1271 | return false; |
| 1272 | } |
| 1273 | |
| 1274 | // Since we are leaving the frame here, we can convert a forced return |
| 1275 | // into a normal return right away. |
| 1276 | cx->clearPropagatingForcedReturn(); |
| 1277 | } |
| 1278 | success = true; |
| 1279 | return true; |
| 1280 | } |
| 1281 | |
| 1282 | /* static */ |
| 1283 | bool DebugAPI::slowPathOnNewGenerator(JSContext* cx, AbstractFramePtr frame, |
| 1284 | Handle<AbstractGeneratorObject*> genObj) { |
| 1285 | // This is called from JSOp::Generator, after default parameter expressions |
| 1286 | // are evaluated and well after onEnterFrame, so Debugger.Frame objects for |
| 1287 | // `frame` may already have been exposed to debugger code. The |
| 1288 | // AbstractGeneratorObject for this generator call, though, has just been |
| 1289 | // created. It must be associated with any existing Debugger.Frames. |
| 1290 | |
| 1291 | // Initializing frames with their associated generator is critical to the |
| 1292 | // functionality of the debugger, so if there is an OOM, we want to |
| 1293 | // cleanly terminate all of the frames. |
| 1294 | auto terminateDebuggerFramesGuard = |
| 1295 | MakeScopeExit([&] { Debugger::terminateDebuggerFrames(cx, frame); }); |
| 1296 | |
| 1297 | bool ok = true; |
| 1298 | gc::AutoSuppressGC nogc(cx); |
| 1299 | Debugger::forEachOnStackDebuggerFrame( |
| 1300 | frame, nogc, [&](Debugger* dbg, DebuggerFrame* frameObjPtr) { |
| 1301 | if (!ok) { |
| 1302 | return; |
| 1303 | } |
| 1304 | |
| 1305 | Rooted<DebuggerFrame*> frameObj(cx, frameObjPtr); |
| 1306 | |
| 1307 | AutoRealm ar(cx, frameObj); |
| 1308 | |
| 1309 | if (!DebuggerFrame::setGeneratorInfo(cx, frameObj, genObj)) { |
| 1310 | // This leaves `genObj` and `frameObj` unassociated. It's OK |
| 1311 | // because we won't pause again with this generator on the stack: |
| 1312 | // the caller will immediately discard `genObj` and unwind `frame`. |
| 1313 | ok = false; |
| 1314 | return; |
| 1315 | } |
| 1316 | |
| 1317 | DependentAddPtr<Debugger::GeneratorWeakMap> genPtr( |
| 1318 | cx, dbg->generatorFrames, genObj); |
| 1319 | if (!genPtr.add(cx, dbg->generatorFrames, genObj, frameObj)) { |
| 1320 | ok = false; |
| 1321 | } |
| 1322 | }); |
| 1323 | |
| 1324 | if (!ok) { |
| 1325 | return false; |
| 1326 | } |
| 1327 | |
| 1328 | terminateDebuggerFramesGuard.release(); |
| 1329 | return true; |
| 1330 | } |
| 1331 | |
| 1332 | /* static */ |
| 1333 | bool DebugAPI::slowPathOnDebuggerStatement(JSContext* cx, |
| 1334 | AbstractFramePtr frame) { |
| 1335 | return Debugger::dispatchResumptionHook( |
| 1336 | cx, frame, |
| 1337 | [](Debugger* dbg) -> bool { |
| 1338 | return dbg->getHook(Debugger::OnDebuggerStatement); |
| 1339 | }, |
| 1340 | [&](Debugger* dbg, ResumeMode& resumeMode, MutableHandleValue vp) |
| 1341 | -> bool { return dbg->fireDebuggerStatement(cx, resumeMode, vp); }); |
| 1342 | } |
| 1343 | |
| 1344 | /* static */ |
| 1345 | bool DebugAPI::slowPathOnExceptionUnwind(JSContext* cx, |
| 1346 | AbstractFramePtr frame) { |
| 1347 | // Invoking more JS on an over-recursed stack or after OOM is only going |
| 1348 | // to result in more of the same error. |
| 1349 | if (cx->isThrowingOverRecursed() || cx->isThrowingOutOfMemory()) { |
| 1350 | return true; |
| 1351 | } |
| 1352 | |
| 1353 | // The Debugger API mustn't muck with frames from self-hosted scripts. |
| 1354 | if (frame.hasScript() && frame.script()->selfHosted()) { |
| 1355 | return true; |
| 1356 | } |
| 1357 | |
| 1358 | DebuggerList debuggerList(cx, [](Debugger* dbg) -> bool { |
| 1359 | return dbg->getHook(Debugger::OnExceptionUnwind); |
| 1360 | }); |
| 1361 | |
| 1362 | if (!debuggerList.init(cx)) { |
| 1363 | return false; |
| 1364 | } |
| 1365 | |
| 1366 | if (debuggerList.empty()) { |
| 1367 | return true; |
| 1368 | } |
| 1369 | |
| 1370 | // We save and restore the exception once up front to avoid having to do it |
| 1371 | // for each 'onExceptionUnwind' hook that has been registered, and we also |
| 1372 | // only do it if the debuggerList contains items in order to avoid extra work. |
| 1373 | RootedValue exc(cx); |
| 1374 | Rooted<SavedFrame*> stack(cx, cx->getPendingExceptionStack()); |
| 1375 | if (!cx->getPendingException(&exc)) { |
| 1376 | return false; |
| 1377 | } |
| 1378 | cx->clearPendingException(); |
| 1379 | |
| 1380 | bool result = debuggerList.dispatchResumptionHook( |
| 1381 | cx, frame, |
| 1382 | [&](Debugger* dbg, ResumeMode& resumeMode, |
| 1383 | MutableHandleValue vp) -> bool { |
| 1384 | return dbg->fireExceptionUnwind(cx, exc, resumeMode, vp); |
| 1385 | }); |
| 1386 | if (!result) { |
| 1387 | return false; |
| 1388 | } |
| 1389 | |
| 1390 | cx->setPendingException(exc, stack); |
| 1391 | return true; |
| 1392 | } |
| 1393 | |
| 1394 | // TODO: Remove Remove this function when all properties/methods returning a |
| 1395 | /// DebuggerEnvironment have been given a C++ interface (bug 1271649). |
| 1396 | bool Debugger::wrapEnvironment(JSContext* cx, Handle<Env*> env, |
| 1397 | MutableHandleValue rval) { |
| 1398 | if (!env) { |
| 1399 | rval.setNull(); |
| 1400 | return true; |
| 1401 | } |
| 1402 | |
| 1403 | Rooted<DebuggerEnvironment*> envobj(cx); |
| 1404 | |
| 1405 | if (!wrapEnvironment(cx, env, &envobj)) { |
| 1406 | return false; |
| 1407 | } |
| 1408 | |
| 1409 | rval.setObject(*envobj); |
| 1410 | return true; |
| 1411 | } |
| 1412 | |
| 1413 | bool Debugger::wrapEnvironment(JSContext* cx, Handle<Env*> env, |
| 1414 | MutableHandle<DebuggerEnvironment*> result) { |
| 1415 | MOZ_ASSERT(env)do { static_assert( mozilla::detail::AssertionConditionType< decltype(env)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(env))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("env", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1415); AnnotateMozCrashReason("MOZ_ASSERT" "(" "env" ")"); do { *((volatile int*)__null) = 1415; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 1416 | |
| 1417 | // DebuggerEnv should only wrap a debug scope chain obtained (transitively) |
| 1418 | // from GetDebugEnvironmentFor(Frame|Function). |
| 1419 | MOZ_ASSERT(!IsSyntacticEnvironment(env))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!IsSyntacticEnvironment(env))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!IsSyntacticEnvironment(env) ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!IsSyntacticEnvironment(env)", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1419); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!IsSyntacticEnvironment(env)" ")"); do { *((volatile int*)__null) = 1419; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1420 | |
| 1421 | DependentAddPtr<EnvironmentWeakMap> p(cx, environments, env); |
| 1422 | if (p) { |
| 1423 | result.set(&p->value()->as<DebuggerEnvironment>()); |
| 1424 | } else { |
| 1425 | // Create a new Debugger.Environment for env. |
| 1426 | RootedObject proto( |
| 1427 | cx, &object->getReservedSlot(JSSLOT_DEBUG_ENV_PROTO).toObject()); |
| 1428 | Rooted<NativeObject*> debugger(cx, object); |
| 1429 | |
| 1430 | Rooted<DebuggerEnvironment*> envobj( |
| 1431 | cx, DebuggerEnvironment::create(cx, proto, env, debugger)); |
| 1432 | if (!envobj) { |
| 1433 | return false; |
| 1434 | } |
| 1435 | |
| 1436 | if (!p.add(cx, environments, env, envobj)) { |
| 1437 | // We need to destroy the edge to the referent, to avoid trying to trace |
| 1438 | // it during untimely collections. |
| 1439 | envobj->clearReferent(); |
| 1440 | return false; |
| 1441 | } |
| 1442 | |
| 1443 | result.set(envobj); |
| 1444 | } |
| 1445 | |
| 1446 | return true; |
| 1447 | } |
| 1448 | |
| 1449 | bool Debugger::wrapDebuggeeValue(JSContext* cx, MutableHandleValue vp) { |
| 1450 | cx->check(object.get()); |
| 1451 | |
| 1452 | if (vp.isObject()) { |
| 1453 | RootedObject obj(cx, &vp.toObject()); |
| 1454 | Rooted<DebuggerObject*> dobj(cx); |
| 1455 | |
| 1456 | if (!wrapDebuggeeObject(cx, obj, &dobj)) { |
| 1457 | return false; |
| 1458 | } |
| 1459 | |
| 1460 | vp.setObject(*dobj); |
| 1461 | } else if (vp.isMagic()) { |
| 1462 | Rooted<PlainObject*> optObj(cx, NewPlainObject(cx)); |
| 1463 | if (!optObj) { |
| 1464 | return false; |
| 1465 | } |
| 1466 | |
| 1467 | // We handle three sentinel values: missing arguments |
| 1468 | // (JS_MISSING_ARGUMENTS), optimized out slots (JS_OPTIMIZED_OUT), |
| 1469 | // and uninitialized bindings (JS_UNINITIALIZED_LEXICAL). |
| 1470 | // |
| 1471 | // Other magic values should not have escaped. |
| 1472 | PropertyName* name; |
| 1473 | switch (vp.whyMagic()) { |
| 1474 | case JS_MISSING_ARGUMENTS: |
| 1475 | name = cx->names().missingArguments; |
| 1476 | break; |
| 1477 | case JS_OPTIMIZED_OUT: |
| 1478 | name = cx->names().optimizedOut; |
| 1479 | break; |
| 1480 | case JS_UNINITIALIZED_LEXICAL: |
| 1481 | name = cx->names().uninitialized; |
| 1482 | break; |
| 1483 | default: |
| 1484 | MOZ_CRASH("Unsupported magic value escaped to Debugger")do { do { } while (false); MOZ_ReportCrash("" "Unsupported magic value escaped to Debugger" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1484); AnnotateMozCrashReason("MOZ_CRASH(" "Unsupported magic value escaped to Debugger" ")"); do { *((volatile int*)__null) = 1484; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 1485 | } |
| 1486 | |
| 1487 | RootedValue trueVal(cx, BooleanValue(true)); |
| 1488 | if (!DefineDataProperty(cx, optObj, name, trueVal)) { |
| 1489 | return false; |
| 1490 | } |
| 1491 | |
| 1492 | vp.setObject(*optObj); |
| 1493 | } else if (!cx->compartment()->wrap(cx, vp)) { |
| 1494 | vp.setUndefined(); |
| 1495 | return false; |
| 1496 | } |
| 1497 | |
| 1498 | return true; |
| 1499 | } |
| 1500 | |
| 1501 | bool Debugger::wrapNullableDebuggeeObject( |
| 1502 | JSContext* cx, HandleObject obj, MutableHandle<DebuggerObject*> result) { |
| 1503 | if (!obj) { |
| 1504 | result.set(nullptr); |
| 1505 | return true; |
| 1506 | } |
| 1507 | |
| 1508 | return wrapDebuggeeObject(cx, obj, result); |
| 1509 | } |
| 1510 | |
| 1511 | bool Debugger::wrapDebuggeeObject(JSContext* cx, HandleObject obj, |
| 1512 | MutableHandle<DebuggerObject*> result) { |
| 1513 | MOZ_ASSERT(obj)do { static_assert( mozilla::detail::AssertionConditionType< decltype(obj)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(obj))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("obj", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1513); AnnotateMozCrashReason("MOZ_ASSERT" "(" "obj" ")"); do { *((volatile int*)__null) = 1513; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 1514 | |
| 1515 | DependentAddPtr<ObjectWeakMap> p(cx, objects, obj); |
| 1516 | if (p) { |
| 1517 | result.set(&p->value()->as<DebuggerObject>()); |
| 1518 | } else { |
| 1519 | // Create a new Debugger.Object for obj. |
| 1520 | Rooted<NativeObject*> debugger(cx, object); |
| 1521 | RootedObject proto( |
| 1522 | cx, &object->getReservedSlot(JSSLOT_DEBUG_OBJECT_PROTO).toObject()); |
| 1523 | Rooted<DebuggerObject*> dobj( |
| 1524 | cx, DebuggerObject::create(cx, proto, obj, debugger)); |
| 1525 | if (!dobj) { |
| 1526 | return false; |
| 1527 | } |
| 1528 | |
| 1529 | if (!p.add(cx, objects, obj, dobj)) { |
| 1530 | // We need to destroy the edge to the referent, to avoid trying to trace |
| 1531 | // it during untimely collections. |
| 1532 | dobj->clearReferent(); |
| 1533 | return false; |
| 1534 | } |
| 1535 | |
| 1536 | result.set(dobj); |
| 1537 | } |
| 1538 | |
| 1539 | return true; |
| 1540 | } |
| 1541 | |
| 1542 | static DebuggerObject* ToNativeDebuggerObject(JSContext* cx, |
| 1543 | MutableHandleObject obj) { |
| 1544 | if (!obj->is<DebuggerObject>()) { |
| 1545 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 1546 | JSMSG_NOT_EXPECTED_TYPE, "Debugger", |
| 1547 | "Debugger.Object", obj->getClass()->name); |
| 1548 | return nullptr; |
| 1549 | } |
| 1550 | |
| 1551 | return &obj->as<DebuggerObject>(); |
| 1552 | } |
| 1553 | |
| 1554 | bool Debugger::unwrapDebuggeeObject(JSContext* cx, MutableHandleObject obj) { |
| 1555 | DebuggerObject* ndobj = ToNativeDebuggerObject(cx, obj); |
| 1556 | if (!ndobj) { |
| 1557 | return false; |
| 1558 | } |
| 1559 | |
| 1560 | if (ndobj->owner() != Debugger::fromJSObject(object)) { |
| 1561 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 1562 | JSMSG_DEBUG_WRONG_OWNER, "Debugger.Object"); |
| 1563 | return false; |
| 1564 | } |
| 1565 | |
| 1566 | obj.set(ndobj->referent()); |
| 1567 | return true; |
| 1568 | } |
| 1569 | |
| 1570 | bool Debugger::unwrapDebuggeeValue(JSContext* cx, MutableHandleValue vp) { |
| 1571 | cx->check(object.get(), vp); |
| 1572 | if (vp.isObject()) { |
| 1573 | RootedObject dobj(cx, &vp.toObject()); |
| 1574 | if (!unwrapDebuggeeObject(cx, &dobj)) { |
| 1575 | return false; |
| 1576 | } |
| 1577 | vp.setObject(*dobj); |
| 1578 | } |
| 1579 | return true; |
| 1580 | } |
| 1581 | |
| 1582 | static bool CheckArgCompartment(JSContext* cx, JSObject* obj, JSObject* arg, |
| 1583 | const char* methodname, const char* propname) { |
| 1584 | if (arg->compartment() != obj->compartment()) { |
| 1585 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 1586 | JSMSG_DEBUG_COMPARTMENT_MISMATCH, methodname, |
| 1587 | propname); |
| 1588 | return false; |
| 1589 | } |
| 1590 | return true; |
| 1591 | } |
| 1592 | |
| 1593 | static bool CheckArgCompartment(JSContext* cx, JSObject* obj, HandleValue v, |
| 1594 | const char* methodname, const char* propname) { |
| 1595 | if (v.isObject()) { |
| 1596 | return CheckArgCompartment(cx, obj, &v.toObject(), methodname, propname); |
| 1597 | } |
| 1598 | return true; |
| 1599 | } |
| 1600 | |
| 1601 | bool Debugger::unwrapPropertyDescriptor( |
| 1602 | JSContext* cx, HandleObject obj, MutableHandle<PropertyDescriptor> desc) { |
| 1603 | if (desc.hasValue()) { |
| 1604 | RootedValue value(cx, desc.value()); |
| 1605 | if (!unwrapDebuggeeValue(cx, &value) || |
| 1606 | !CheckArgCompartment(cx, obj, value, "defineProperty", "value")) { |
| 1607 | return false; |
| 1608 | } |
| 1609 | desc.setValue(value); |
| 1610 | } |
| 1611 | |
| 1612 | if (desc.hasGetter()) { |
| 1613 | RootedObject get(cx, desc.getter()); |
| 1614 | if (get) { |
| 1615 | if (!unwrapDebuggeeObject(cx, &get)) { |
| 1616 | return false; |
| 1617 | } |
| 1618 | if (!CheckArgCompartment(cx, obj, get, "defineProperty", "get")) { |
| 1619 | return false; |
| 1620 | } |
| 1621 | } |
| 1622 | desc.setGetter(get); |
| 1623 | } |
| 1624 | |
| 1625 | if (desc.hasSetter()) { |
| 1626 | RootedObject set(cx, desc.setter()); |
| 1627 | if (set) { |
| 1628 | if (!unwrapDebuggeeObject(cx, &set)) { |
| 1629 | return false; |
| 1630 | } |
| 1631 | if (!CheckArgCompartment(cx, obj, set, "defineProperty", "set")) { |
| 1632 | return false; |
| 1633 | } |
| 1634 | } |
| 1635 | desc.setSetter(set); |
| 1636 | } |
| 1637 | |
| 1638 | return true; |
| 1639 | } |
| 1640 | |
| 1641 | /*** Debuggee resumption values and debugger error handling *****************/ |
| 1642 | |
| 1643 | static bool GetResumptionProperty(JSContext* cx, HandleObject obj, |
| 1644 | Handle<PropertyName*> name, |
| 1645 | ResumeMode namedMode, ResumeMode& resumeMode, |
| 1646 | MutableHandleValue vp, int* hits) { |
| 1647 | bool found; |
| 1648 | if (!HasProperty(cx, obj, name, &found)) { |
| 1649 | return false; |
| 1650 | } |
| 1651 | if (found) { |
| 1652 | ++*hits; |
| 1653 | resumeMode = namedMode; |
| 1654 | if (!GetProperty(cx, obj, obj, name, vp)) { |
| 1655 | return false; |
| 1656 | } |
| 1657 | } |
| 1658 | return true; |
| 1659 | } |
| 1660 | |
| 1661 | bool js::ParseResumptionValue(JSContext* cx, HandleValue rval, |
| 1662 | ResumeMode& resumeMode, MutableHandleValue vp) { |
| 1663 | if (rval.isUndefined()) { |
| 1664 | resumeMode = ResumeMode::Continue; |
| 1665 | vp.setUndefined(); |
| 1666 | return true; |
| 1667 | } |
| 1668 | if (rval.isNull()) { |
| 1669 | resumeMode = ResumeMode::Terminate; |
| 1670 | vp.setUndefined(); |
| 1671 | return true; |
| 1672 | } |
| 1673 | |
| 1674 | int hits = 0; |
| 1675 | if (rval.isObject()) { |
| 1676 | RootedObject obj(cx, &rval.toObject()); |
| 1677 | if (!GetResumptionProperty(cx, obj, cx->names().return_, ResumeMode::Return, |
| 1678 | resumeMode, vp, &hits)) { |
| 1679 | return false; |
| 1680 | } |
| 1681 | if (!GetResumptionProperty(cx, obj, cx->names().throw_, ResumeMode::Throw, |
| 1682 | resumeMode, vp, &hits)) { |
| 1683 | return false; |
| 1684 | } |
| 1685 | } |
| 1686 | |
| 1687 | if (hits != 1) { |
| 1688 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 1689 | JSMSG_DEBUG_BAD_RESUMPTION); |
| 1690 | return false; |
| 1691 | } |
| 1692 | return true; |
| 1693 | } |
| 1694 | |
| 1695 | static bool CheckResumptionValue(JSContext* cx, AbstractFramePtr frame, |
| 1696 | const jsbytecode* pc, ResumeMode resumeMode, |
| 1697 | MutableHandleValue vp) { |
| 1698 | // Only forced returns from a frame need to be validated because forced |
| 1699 | // throw values behave just like debuggee `throw` statements. Since |
| 1700 | // forced-return is all custom logic within SpiderMonkey itself, we need |
| 1701 | // our own custom validation for it to conform with what is expected. |
| 1702 | if (resumeMode != ResumeMode::Return || !frame) { |
| 1703 | return true; |
| 1704 | } |
| 1705 | |
| 1706 | // This replicates the ECMA spec's behavior for [[Construct]] in derived |
| 1707 | // class constructors (section 9.2.2 of ECMA262-2020), where returning a |
| 1708 | // non-undefined primitive causes an exception tobe thrown. |
| 1709 | if (frame.debuggerNeedsCheckPrimitiveReturn() && vp.isPrimitive()) { |
| 1710 | if (!vp.isUndefined()) { |
| 1711 | ReportValueError(cx, JSMSG_BAD_DERIVED_RETURN, JSDVG_IGNORE_STACK0, vp, |
| 1712 | nullptr); |
| 1713 | return false; |
| 1714 | } |
| 1715 | |
| 1716 | RootedValue thisv(cx); |
| 1717 | { |
| 1718 | AutoRealm ar(cx, frame.environmentChain()); |
| 1719 | if (!GetThisValueForDebuggerFrameMaybeOptimizedOut(cx, frame, pc, |
| 1720 | &thisv)) { |
| 1721 | return false; |
| 1722 | } |
| 1723 | } |
| 1724 | |
| 1725 | if (thisv.isMagic(JS_UNINITIALIZED_LEXICAL)) { |
| 1726 | return ThrowUninitializedThis(cx); |
| 1727 | } |
| 1728 | MOZ_ASSERT(!thisv.isMagic())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!thisv.isMagic())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!thisv.isMagic()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!thisv.isMagic()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1728); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!thisv.isMagic()" ")"); do { *((volatile int*)__null) = 1728; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1729 | |
| 1730 | if (!cx->compartment()->wrap(cx, &thisv)) { |
| 1731 | return false; |
| 1732 | } |
| 1733 | vp.set(thisv); |
| 1734 | } |
| 1735 | |
| 1736 | // Check for forcing return from a generator before the initial yield. This |
| 1737 | // is not supported because some engine-internal code assumes a call to a |
| 1738 | // generator will return a GeneratorObject; see bug 1477084. |
| 1739 | if (frame.isFunctionFrame() && frame.callee()->isGenerator()) { |
| 1740 | Rooted<AbstractGeneratorObject*> genObj(cx); |
| 1741 | { |
| 1742 | AutoRealm ar(cx, frame.callee()); |
| 1743 | genObj = GetGeneratorObjectForFrame(cx, frame); |
| 1744 | } |
| 1745 | |
| 1746 | if (!genObj || genObj->isBeforeInitialYield()) { |
| 1747 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 1748 | JSMSG_DEBUG_FORCED_RETURN_DISALLOWED); |
| 1749 | return false; |
| 1750 | } |
| 1751 | } |
| 1752 | |
| 1753 | return true; |
| 1754 | } |
| 1755 | |
| 1756 | // Last-minute sanity adjustments to resumption. |
| 1757 | // |
| 1758 | // This is called last, as we leave the debugger. It must happen outside the |
| 1759 | // control of the uncaughtExceptionHook, because this code assumes we won't |
| 1760 | // change our minds and continue execution--we must not close the generator |
| 1761 | // object unless we're really going to force-return. |
| 1762 | [[nodiscard]] static bool AdjustGeneratorResumptionValue( |
| 1763 | JSContext* cx, AbstractFramePtr frame, ResumeMode& resumeMode, |
| 1764 | MutableHandleValue vp) { |
| 1765 | if (resumeMode != ResumeMode::Return && resumeMode != ResumeMode::Throw) { |
| 1766 | return true; |
| 1767 | } |
| 1768 | |
| 1769 | if (!frame) { |
| 1770 | return true; |
| 1771 | } |
| 1772 | // Async modules need to be handled separately, as they do not have a callee. |
| 1773 | // frame.callee will throw if it is called on a moduleFrame. |
| 1774 | bool isAsyncModule = frame.isModuleFrame() && frame.script()->isAsync(); |
| 1775 | if (!frame.isFunctionFrame() && !isAsyncModule) { |
| 1776 | return true; |
| 1777 | } |
| 1778 | |
| 1779 | // Treat `{return: <value>}` like a `return` statement. Simulate what the |
| 1780 | // debuggee would do for an ordinary `return` statement, using a few bytecode |
| 1781 | // instructions. It's simpler to do the work manually than to count on that |
| 1782 | // bytecode sequence existing in the debuggee, somehow jump to it, and then |
| 1783 | // avoid re-entering the debugger from it. |
| 1784 | // |
| 1785 | // Similarly treat `{throw: <value>}` like a `throw` statement. |
| 1786 | // |
| 1787 | // Note: Async modules use the same handling as async functions. |
| 1788 | if (frame.isFunctionFrame() && frame.callee()->isGenerator()) { |
| 1789 | // Throw doesn't require any special processing for (async) generators. |
| 1790 | if (resumeMode == ResumeMode::Throw) { |
| 1791 | return true; |
| 1792 | } |
| 1793 | |
| 1794 | // Forcing return from a (possibly async) generator. |
| 1795 | Rooted<AbstractGeneratorObject*> genObj( |
| 1796 | cx, GetGeneratorObjectForFrame(cx, frame)); |
| 1797 | |
| 1798 | // We already went through CheckResumptionValue, which would have replaced |
| 1799 | // this invalid resumption value with an error if we were trying to force |
| 1800 | // return before the initial yield. |
| 1801 | MOZ_RELEASE_ASSERT(genObj && !genObj->isBeforeInitialYield())do { static_assert( mozilla::detail::AssertionConditionType< decltype(genObj && !genObj->isBeforeInitialYield() )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(genObj && !genObj->isBeforeInitialYield() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "genObj && !genObj->isBeforeInitialYield()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1801); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "genObj && !genObj->isBeforeInitialYield()" ")"); do { *((volatile int*)__null) = 1801; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1802 | |
| 1803 | // 1. `return <value>` creates and returns a new object, |
| 1804 | // `{value: <value>, done: true}`. |
| 1805 | // |
| 1806 | // For non-async generators, the iterator result object is created in |
| 1807 | // bytecode, so we have to simulate that here. For async generators, our |
| 1808 | // C++ implementation of AsyncGeneratorResolve will do this. So don't do it |
| 1809 | // twice: |
| 1810 | if (!genObj->is<AsyncGeneratorObject>()) { |
| 1811 | PlainObject* pair = CreateIterResultObject(cx, vp, true); |
| 1812 | if (!pair) { |
| 1813 | return false; |
| 1814 | } |
| 1815 | vp.setObject(*pair); |
| 1816 | } |
| 1817 | |
| 1818 | // 2. The generator must be closed. |
| 1819 | genObj->setClosed(cx); |
| 1820 | |
| 1821 | // Async generators have additionally bookkeeping which must be adjusted |
| 1822 | // when switching over to the closed state. |
| 1823 | if (genObj->is<AsyncGeneratorObject>()) { |
| 1824 | genObj->as<AsyncGeneratorObject>().setCompleted(); |
| 1825 | } |
| 1826 | } else if (isAsyncModule || frame.callee()->isAsync()) { |
| 1827 | if (AbstractGeneratorObject* genObj = |
| 1828 | GetGeneratorObjectForFrame(cx, frame)) { |
| 1829 | // Throw doesn't require any special processing for async functions when |
| 1830 | // the internal generator object is already present. |
| 1831 | if (resumeMode == ResumeMode::Throw) { |
| 1832 | return true; |
| 1833 | } |
| 1834 | |
| 1835 | Rooted<AsyncFunctionGeneratorObject*> generator( |
| 1836 | cx, &genObj->as<AsyncFunctionGeneratorObject>()); |
| 1837 | |
| 1838 | // 1. `return <value>` fulfills and returns the async function's promise. |
| 1839 | Rooted<PromiseObject*> promise(cx, generator->promise()); |
| 1840 | if (promise->state() == JS::PromiseState::Pending) { |
| 1841 | if (!AsyncFunctionResolve(cx, generator, vp)) { |
| 1842 | return false; |
| 1843 | } |
| 1844 | } |
| 1845 | vp.setObject(*promise); |
| 1846 | |
| 1847 | // 2. The generator must be closed. |
| 1848 | generator->setClosed(cx); |
| 1849 | } else { |
| 1850 | // We're before entering the actual function code. |
| 1851 | |
| 1852 | // 1. `throw <value>` creates a promise rejected with the value *vp. |
| 1853 | // 1. `return <value>` creates a promise resolved with the value *vp. |
| 1854 | JSObject* promise = resumeMode == ResumeMode::Throw |
| 1855 | ? PromiseObject::unforgeableReject(cx, vp) |
| 1856 | : PromiseObject::unforgeableResolve(cx, vp); |
| 1857 | if (!promise) { |
| 1858 | return false; |
| 1859 | } |
| 1860 | vp.setObject(*promise); |
| 1861 | |
| 1862 | // 2. Return normally in both cases. |
| 1863 | resumeMode = ResumeMode::Return; |
| 1864 | } |
| 1865 | } |
| 1866 | |
| 1867 | return true; |
| 1868 | } |
| 1869 | |
| 1870 | bool Debugger::processParsedHandlerResult(JSContext* cx, AbstractFramePtr frame, |
| 1871 | const jsbytecode* pc, bool success, |
| 1872 | ResumeMode resumeMode, |
| 1873 | HandleValue value, |
| 1874 | ResumeMode& resultMode, |
| 1875 | MutableHandleValue vp) { |
| 1876 | RootedValue rootValue(cx, value); |
| 1877 | if (!success || !prepareResumption(cx, frame, pc, resumeMode, &rootValue)) { |
| 1878 | RootedValue exceptionRv(cx); |
| 1879 | if (!callUncaughtExceptionHandler(cx, &exceptionRv) || |
| 1880 | !ParseResumptionValue(cx, exceptionRv, resumeMode, &rootValue) || |
| 1881 | !prepareResumption(cx, frame, pc, resumeMode, &rootValue)) { |
| 1882 | return false; |
| 1883 | } |
| 1884 | } |
| 1885 | |
| 1886 | // Since debugger hooks accumulate into the same final value handle, we |
| 1887 | // use that to throw if multiple hooks try to set a resumption value. |
| 1888 | if (resumeMode != ResumeMode::Continue) { |
| 1889 | if (resultMode != ResumeMode::Continue) { |
| 1890 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 1891 | JSMSG_DEBUG_RESUMPTION_CONFLICT); |
| 1892 | return false; |
| 1893 | } |
| 1894 | |
| 1895 | vp.set(rootValue); |
| 1896 | resultMode = resumeMode; |
| 1897 | } |
| 1898 | |
| 1899 | return true; |
| 1900 | } |
| 1901 | |
| 1902 | bool Debugger::processHandlerResult(JSContext* cx, bool success, HandleValue rv, |
| 1903 | AbstractFramePtr frame, jsbytecode* pc, |
| 1904 | ResumeMode& resultMode, |
| 1905 | MutableHandleValue vp) { |
| 1906 | ResumeMode resumeMode = ResumeMode::Continue; |
| 1907 | RootedValue value(cx); |
| 1908 | if (success) { |
| 1909 | success = ParseResumptionValue(cx, rv, resumeMode, &value); |
| 1910 | } |
| 1911 | return processParsedHandlerResult(cx, frame, pc, success, resumeMode, value, |
| 1912 | resultMode, vp); |
| 1913 | } |
| 1914 | |
| 1915 | bool Debugger::prepareResumption(JSContext* cx, AbstractFramePtr frame, |
| 1916 | const jsbytecode* pc, ResumeMode& resumeMode, |
| 1917 | MutableHandleValue vp) { |
| 1918 | return unwrapDebuggeeValue(cx, vp) && |
| 1919 | CheckResumptionValue(cx, frame, pc, resumeMode, vp); |
| 1920 | } |
| 1921 | |
| 1922 | bool Debugger::callUncaughtExceptionHandler(JSContext* cx, |
| 1923 | MutableHandleValue vp) { |
| 1924 | // Uncaught exceptions arise from Debugger code, and so we must already be in |
| 1925 | // an NX section. This also establishes that we are already within the scope |
| 1926 | // of an AutoDebuggerJobQueueInterruption object. |
| 1927 | MOZ_ASSERT(EnterDebuggeeNoExecute::isLockedInStack(cx, *this))do { static_assert( mozilla::detail::AssertionConditionType< decltype(EnterDebuggeeNoExecute::isLockedInStack(cx, *this))> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(EnterDebuggeeNoExecute::isLockedInStack(cx, *this))) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("EnterDebuggeeNoExecute::isLockedInStack(cx, *this)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1927); AnnotateMozCrashReason("MOZ_ASSERT" "(" "EnterDebuggeeNoExecute::isLockedInStack(cx, *this)" ")"); do { *((volatile int*)__null) = 1927; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1928 | |
| 1929 | if (cx->isExceptionPending() && uncaughtExceptionHook) { |
| 1930 | RootedValue exc(cx); |
| 1931 | if (!cx->getPendingException(&exc)) { |
| 1932 | return false; |
| 1933 | } |
| 1934 | cx->clearPendingException(); |
| 1935 | |
| 1936 | RootedValue fval(cx, ObjectValue(*uncaughtExceptionHook)); |
| 1937 | if (js::Call(cx, fval, object, exc, vp)) { |
| 1938 | return true; |
| 1939 | } |
| 1940 | } |
| 1941 | return false; |
| 1942 | } |
| 1943 | |
| 1944 | bool Debugger::handleUncaughtException(JSContext* cx) { |
| 1945 | RootedValue rv(cx); |
| 1946 | |
| 1947 | return callUncaughtExceptionHandler(cx, &rv); |
| 1948 | } |
| 1949 | |
| 1950 | void Debugger::reportUncaughtException(JSContext* cx) { |
| 1951 | // Uncaught exceptions arise from Debugger code, and so we must already be |
| 1952 | // in an NX section. |
| 1953 | MOZ_ASSERT(EnterDebuggeeNoExecute::isLockedInStack(cx, *this))do { static_assert( mozilla::detail::AssertionConditionType< decltype(EnterDebuggeeNoExecute::isLockedInStack(cx, *this))> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(EnterDebuggeeNoExecute::isLockedInStack(cx, *this))) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("EnterDebuggeeNoExecute::isLockedInStack(cx, *this)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1953); AnnotateMozCrashReason("MOZ_ASSERT" "(" "EnterDebuggeeNoExecute::isLockedInStack(cx, *this)" ")"); do { *((volatile int*)__null) = 1953; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1954 | |
| 1955 | if (cx->isExceptionPending()) { |
| 1956 | // We want to report the pending exception, but we want to let the |
| 1957 | // embedding handle it however it wants to. So pretend like we're |
| 1958 | // starting a new script execution on our current compartment (which |
| 1959 | // is the debugger compartment, so reported errors won't get |
| 1960 | // reported to various onerror handlers in debuggees) and as part of |
| 1961 | // that "execution" simply throw our exception so the embedding can |
| 1962 | // deal. |
| 1963 | RootedValue exn(cx); |
| 1964 | if (cx->getPendingException(&exn)) { |
| 1965 | // Clear the exception, because ReportErrorToGlobal will assert that |
| 1966 | // we don't have one. |
| 1967 | cx->clearPendingException(); |
| 1968 | ReportErrorToGlobal(cx, cx->global(), exn); |
| 1969 | } |
| 1970 | |
| 1971 | // And if not, or if PrepareScriptEnvironmentAndInvoke somehow left an |
| 1972 | // exception on cx (which it totally shouldn't do), just give up. |
| 1973 | cx->clearPendingException(); |
| 1974 | } |
| 1975 | } |
| 1976 | |
| 1977 | /*** Debuggee completion values *********************************************/ |
| 1978 | |
| 1979 | /* static */ |
| 1980 | Completion Completion::fromJSResult(JSContext* cx, bool ok, const Value& rv) { |
| 1981 | MOZ_ASSERT_IF(ok, !cx->isExceptionPending())do { if (ok) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(!cx->isExceptionPending())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!cx->isExceptionPending() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!cx->isExceptionPending()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 1981); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!cx->isExceptionPending()" ")"); do { *((volatile int*)__null) = 1981; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 1982 | |
| 1983 | if (ok) { |
| 1984 | return Completion(Return(rv)); |
| 1985 | } |
| 1986 | |
| 1987 | if (!cx->isExceptionPending()) { |
| 1988 | return Completion(Terminate()); |
| 1989 | } |
| 1990 | |
| 1991 | RootedValue exception(cx); |
| 1992 | Rooted<SavedFrame*> stack(cx, cx->getPendingExceptionStack()); |
| 1993 | bool getSucceeded = cx->getPendingException(&exception); |
| 1994 | cx->clearPendingException(); |
| 1995 | if (!getSucceeded) { |
| 1996 | return Completion(Terminate()); |
| 1997 | } |
| 1998 | |
| 1999 | return Completion(Throw(exception, stack)); |
| 2000 | } |
| 2001 | |
| 2002 | /* static */ |
| 2003 | Completion Completion::fromJSFramePop(JSContext* cx, AbstractFramePtr frame, |
| 2004 | const jsbytecode* pc, bool ok) { |
| 2005 | // Only Wasm frames get a null pc. |
| 2006 | MOZ_ASSERT_IF(!frame.isWasmDebugFrame(), pc)do { if (!frame.isWasmDebugFrame()) { do { static_assert( mozilla ::detail::AssertionConditionType<decltype(pc)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(pc))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("pc", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2006); AnnotateMozCrashReason("MOZ_ASSERT" "(" "pc" ")"); do { *((volatile int*)__null) = 2006; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); } } while (false ); |
| 2007 | |
| 2008 | // If this isn't a generator suspension, then that's already handled above. |
| 2009 | if (!ok || !frame.isGeneratorFrame()) { |
| 2010 | return fromJSResult(cx, ok, frame.returnValue()); |
| 2011 | } |
| 2012 | |
| 2013 | // A generator is being suspended or returning. |
| 2014 | |
| 2015 | // Since generators are never wasm, we can assume pc is not nullptr, and |
| 2016 | // that analyzing bytecode is meaningful. |
| 2017 | MOZ_ASSERT(!frame.isWasmDebugFrame())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!frame.isWasmDebugFrame())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!frame.isWasmDebugFrame()))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("!frame.isWasmDebugFrame()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2017); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!frame.isWasmDebugFrame()" ")"); do { *((volatile int*)__null) = 2017; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2018 | |
| 2019 | // If we're leaving successfully at a yield opcode, we're probably |
| 2020 | // suspending; the `isClosed()` check detects a debugger forced return from |
| 2021 | // an `onStep` handler, which looks almost the same. |
| 2022 | // |
| 2023 | // GetGeneratorObjectForFrame can return nullptr even when a generator |
| 2024 | // object does exist, if the frame is paused between the Generator and |
| 2025 | // SetAliasedVar opcodes. But by checking the opcode first we eliminate that |
| 2026 | // possibility, so it's fine to call genObj->isClosed(). |
| 2027 | Rooted<AbstractGeneratorObject*> generatorObj( |
| 2028 | cx, GetGeneratorObjectForFrame(cx, frame)); |
| 2029 | switch (JSOp(*pc)) { |
| 2030 | case JSOp::InitialYield: |
| 2031 | MOZ_ASSERT(!generatorObj->isClosed())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!generatorObj->isClosed())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!generatorObj->isClosed() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!generatorObj->isClosed()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2031); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!generatorObj->isClosed()" ")"); do { *((volatile int*)__null) = 2031; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2032 | return Completion(InitialYield(generatorObj)); |
| 2033 | |
| 2034 | case JSOp::Yield: |
| 2035 | MOZ_ASSERT(!generatorObj->isClosed())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!generatorObj->isClosed())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!generatorObj->isClosed() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!generatorObj->isClosed()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2035); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!generatorObj->isClosed()" ")"); do { *((volatile int*)__null) = 2035; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2036 | return Completion(Yield(generatorObj, frame.returnValue())); |
| 2037 | |
| 2038 | case JSOp::Await: |
| 2039 | MOZ_ASSERT(!generatorObj->isClosed())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!generatorObj->isClosed())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!generatorObj->isClosed() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!generatorObj->isClosed()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2039); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!generatorObj->isClosed()" ")"); do { *((volatile int*)__null) = 2039; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2040 | return Completion(Await(generatorObj, frame.returnValue())); |
| 2041 | |
| 2042 | default: |
| 2043 | return Completion(Return(frame.returnValue())); |
| 2044 | } |
| 2045 | } |
| 2046 | |
| 2047 | void Completion::trace(JSTracer* trc) { |
| 2048 | variant.match([=](auto& var) { var.trace(trc); }); |
| 2049 | } |
| 2050 | |
| 2051 | struct MOZ_STACK_CLASS Completion::BuildValueMatcher { |
| 2052 | JSContext* cx; |
| 2053 | Debugger* dbg; |
| 2054 | MutableHandleValue result; |
| 2055 | |
| 2056 | BuildValueMatcher(JSContext* cx, Debugger* dbg, MutableHandleValue result) |
| 2057 | : cx(cx), dbg(dbg), result(result) { |
| 2058 | cx->check(dbg->toJSObject()); |
| 2059 | } |
| 2060 | |
| 2061 | bool operator()(const Completion::Return& ret) { |
| 2062 | Rooted<NativeObject*> obj(cx, newObject()); |
| 2063 | RootedValue retval(cx, ret.value); |
| 2064 | if (!obj || !wrap(&retval) || !add(obj, cx->names().return_, retval)) { |
| 2065 | return false; |
| 2066 | } |
| 2067 | result.setObject(*obj); |
| 2068 | return true; |
| 2069 | } |
| 2070 | |
| 2071 | bool operator()(const Completion::Throw& thr) { |
| 2072 | Rooted<NativeObject*> obj(cx, newObject()); |
| 2073 | RootedValue exc(cx, thr.exception); |
| 2074 | if (!obj || !wrap(&exc) || !add(obj, cx->names().throw_, exc)) { |
| 2075 | return false; |
| 2076 | } |
| 2077 | if (thr.stack) { |
| 2078 | RootedValue stack(cx, ObjectValue(*thr.stack)); |
| 2079 | if (!wrapStack(&stack) || !add(obj, cx->names().stack, stack)) { |
| 2080 | return false; |
| 2081 | } |
| 2082 | } |
| 2083 | result.setObject(*obj); |
| 2084 | return true; |
| 2085 | } |
| 2086 | |
| 2087 | bool operator()(const Completion::Terminate& term) { |
| 2088 | result.setNull(); |
| 2089 | return true; |
| 2090 | } |
| 2091 | |
| 2092 | bool operator()(const Completion::InitialYield& initialYield) { |
| 2093 | Rooted<NativeObject*> obj(cx, newObject()); |
| 2094 | RootedValue gen(cx, ObjectValue(*initialYield.generatorObject)); |
| 2095 | if (!obj || !wrap(&gen) || !add(obj, cx->names().return_, gen) || |
| 2096 | !add(obj, cx->names().yield, TrueHandleValue) || |
| 2097 | !add(obj, cx->names().initial, TrueHandleValue)) { |
| 2098 | return false; |
| 2099 | } |
| 2100 | result.setObject(*obj); |
| 2101 | return true; |
| 2102 | } |
| 2103 | |
| 2104 | bool operator()(const Completion::Yield& yield) { |
| 2105 | Rooted<NativeObject*> obj(cx, newObject()); |
| 2106 | RootedValue iteratorResult(cx, yield.iteratorResult); |
| 2107 | if (!obj || !wrap(&iteratorResult) || |
| 2108 | !add(obj, cx->names().return_, iteratorResult) || |
| 2109 | !add(obj, cx->names().yield, TrueHandleValue)) { |
| 2110 | return false; |
| 2111 | } |
| 2112 | result.setObject(*obj); |
| 2113 | return true; |
| 2114 | } |
| 2115 | |
| 2116 | bool operator()(const Completion::Await& await) { |
| 2117 | Rooted<NativeObject*> obj(cx, newObject()); |
| 2118 | RootedValue awaitee(cx, await.awaitee); |
| 2119 | if (!obj || !wrap(&awaitee) || !add(obj, cx->names().return_, awaitee) || |
| 2120 | !add(obj, cx->names().await, TrueHandleValue)) { |
| 2121 | return false; |
| 2122 | } |
| 2123 | result.setObject(*obj); |
| 2124 | return true; |
| 2125 | } |
| 2126 | |
| 2127 | private: |
| 2128 | NativeObject* newObject() const { return NewPlainObject(cx); } |
| 2129 | |
| 2130 | bool add(Handle<NativeObject*> obj, PropertyName* name, |
| 2131 | HandleValue value) const { |
| 2132 | return NativeDefineDataProperty(cx, obj, name, value, JSPROP_ENUMERATE); |
| 2133 | } |
| 2134 | |
| 2135 | bool wrap(MutableHandleValue v) const { |
| 2136 | return dbg->wrapDebuggeeValue(cx, v); |
| 2137 | } |
| 2138 | |
| 2139 | // Saved stacks are wrapped for direct consumption by debugger code. |
| 2140 | bool wrapStack(MutableHandleValue stack) const { |
| 2141 | return cx->compartment()->wrap(cx, stack); |
| 2142 | } |
| 2143 | }; |
| 2144 | |
| 2145 | bool Completion::buildCompletionValue(JSContext* cx, Debugger* dbg, |
| 2146 | MutableHandleValue result) const { |
| 2147 | return variant.match(BuildValueMatcher(cx, dbg, result)); |
| 2148 | } |
| 2149 | |
| 2150 | void Completion::updateFromHookResult(ResumeMode resumeMode, |
| 2151 | HandleValue value) { |
| 2152 | switch (resumeMode) { |
| 2153 | case ResumeMode::Continue: |
| 2154 | // No change to how we'll resume. |
| 2155 | break; |
| 2156 | |
| 2157 | case ResumeMode::Throw: |
| 2158 | // Since this is a new exception, the stack for the old one may not apply. |
| 2159 | // If we extend resumption values to specify stacks, we could revisit |
| 2160 | // this. |
| 2161 | variant = Variant(Throw(value, nullptr)); |
| 2162 | break; |
| 2163 | |
| 2164 | case ResumeMode::Terminate: |
| 2165 | variant = Variant(Terminate()); |
| 2166 | break; |
| 2167 | |
| 2168 | case ResumeMode::Return: |
| 2169 | variant = Variant(Return(value)); |
| 2170 | break; |
| 2171 | |
| 2172 | default: |
| 2173 | MOZ_CRASH("invalid resumeMode value")do { do { } while (false); MOZ_ReportCrash("" "invalid resumeMode value" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2173); AnnotateMozCrashReason("MOZ_CRASH(" "invalid resumeMode value" ")"); do { *((volatile int*)__null) = 2173; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 2174 | } |
| 2175 | } |
| 2176 | |
| 2177 | struct MOZ_STACK_CLASS Completion::ToResumeModeMatcher { |
| 2178 | MutableHandleValue value; |
| 2179 | MutableHandle<SavedFrame*> exnStack; |
| 2180 | ToResumeModeMatcher(MutableHandleValue value, |
| 2181 | MutableHandle<SavedFrame*> exnStack) |
| 2182 | : value(value), exnStack(exnStack) {} |
| 2183 | |
| 2184 | ResumeMode operator()(const Return& ret) { |
| 2185 | value.set(ret.value); |
| 2186 | return ResumeMode::Return; |
| 2187 | } |
| 2188 | |
| 2189 | ResumeMode operator()(const Throw& thr) { |
| 2190 | value.set(thr.exception); |
| 2191 | exnStack.set(thr.stack); |
| 2192 | return ResumeMode::Throw; |
| 2193 | } |
| 2194 | |
| 2195 | ResumeMode operator()(const Terminate& term) { |
| 2196 | value.setUndefined(); |
| 2197 | return ResumeMode::Terminate; |
| 2198 | } |
| 2199 | |
| 2200 | ResumeMode operator()(const InitialYield& initialYield) { |
| 2201 | value.setObject(*initialYield.generatorObject); |
| 2202 | return ResumeMode::Return; |
| 2203 | } |
| 2204 | |
| 2205 | ResumeMode operator()(const Yield& yield) { |
| 2206 | value.set(yield.iteratorResult); |
| 2207 | return ResumeMode::Return; |
| 2208 | } |
| 2209 | |
| 2210 | ResumeMode operator()(const Await& await) { |
| 2211 | value.set(await.awaitee); |
| 2212 | return ResumeMode::Return; |
| 2213 | } |
| 2214 | }; |
| 2215 | |
| 2216 | void Completion::toResumeMode(ResumeMode& resumeMode, MutableHandleValue value, |
| 2217 | MutableHandle<SavedFrame*> exnStack) const { |
| 2218 | resumeMode = variant.match(ToResumeModeMatcher(value, exnStack)); |
| 2219 | } |
| 2220 | |
| 2221 | /*** Firing debugger hooks **************************************************/ |
| 2222 | |
| 2223 | static bool CallMethodIfPresent(JSContext* cx, HandleObject obj, |
| 2224 | const char* name, size_t argc, Value* argv, |
| 2225 | MutableHandleValue rval) { |
| 2226 | rval.setUndefined(); |
| 2227 | JSAtom* atom = Atomize(cx, name, strlen(name)); |
| 2228 | if (!atom) { |
| 2229 | return false; |
| 2230 | } |
| 2231 | |
| 2232 | RootedId id(cx, AtomToId(atom)); |
| 2233 | RootedValue fval(cx); |
| 2234 | if (!GetProperty(cx, obj, obj, id, &fval)) { |
| 2235 | return false; |
| 2236 | } |
| 2237 | |
| 2238 | if (!IsCallable(fval)) { |
| 2239 | return true; |
| 2240 | } |
| 2241 | |
| 2242 | InvokeArgs args(cx); |
| 2243 | if (!args.init(cx, argc)) { |
| 2244 | return false; |
| 2245 | } |
| 2246 | |
| 2247 | for (size_t i = 0; i < argc; i++) { |
| 2248 | args[i].set(argv[i]); |
| 2249 | } |
| 2250 | |
| 2251 | rval.setObject(*obj); // overwritten by successful Call |
| 2252 | return js::Call(cx, fval, rval, args, rval); |
| 2253 | } |
| 2254 | |
| 2255 | bool Debugger::fireDebuggerStatement(JSContext* cx, ResumeMode& resumeMode, |
| 2256 | MutableHandleValue vp) { |
| 2257 | RootedObject hook(cx, getHook(OnDebuggerStatement)); |
| 2258 | MOZ_ASSERT(hook)do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(hook))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("hook", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2258); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook" ")"); do { *((volatile int*)__null) = 2258; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2259 | MOZ_ASSERT(hook->isCallable())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook->isCallable())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hook->isCallable()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("hook->isCallable()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2259); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook->isCallable()" ")"); do { *((volatile int*)__null) = 2259; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2260 | |
| 2261 | ScriptFrameIter iter(cx); |
| 2262 | RootedValue scriptFrame(cx); |
| 2263 | if (!getFrame(cx, iter, &scriptFrame)) { |
| 2264 | return false; |
| 2265 | } |
| 2266 | |
| 2267 | RootedValue fval(cx, ObjectValue(*hook)); |
| 2268 | RootedValue rv(cx); |
| 2269 | bool ok = js::Call(cx, fval, object, scriptFrame, &rv); |
| 2270 | return processHandlerResult(cx, ok, rv, iter.abstractFramePtr(), iter.pc(), |
| 2271 | resumeMode, vp); |
| 2272 | } |
| 2273 | |
| 2274 | bool Debugger::fireExceptionUnwind(JSContext* cx, HandleValue exc, |
| 2275 | ResumeMode& resumeMode, |
| 2276 | MutableHandleValue vp) { |
| 2277 | RootedObject hook(cx, getHook(OnExceptionUnwind)); |
| 2278 | MOZ_ASSERT(hook)do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(hook))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("hook", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2278); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook" ")"); do { *((volatile int*)__null) = 2278; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2279 | MOZ_ASSERT(hook->isCallable())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook->isCallable())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hook->isCallable()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("hook->isCallable()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2279); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook->isCallable()" ")"); do { *((volatile int*)__null) = 2279; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2280 | |
| 2281 | RootedValue scriptFrame(cx); |
| 2282 | RootedValue wrappedExc(cx, exc); |
| 2283 | |
| 2284 | FrameIter iter(cx); |
| 2285 | if (!getFrame(cx, iter, &scriptFrame) || |
| 2286 | !wrapDebuggeeValue(cx, &wrappedExc)) { |
| 2287 | return false; |
| 2288 | } |
| 2289 | |
| 2290 | RootedValue fval(cx, ObjectValue(*hook)); |
| 2291 | RootedValue rv(cx); |
| 2292 | bool ok = js::Call(cx, fval, object, scriptFrame, wrappedExc, &rv); |
| 2293 | return processHandlerResult(cx, ok, rv, iter.abstractFramePtr(), iter.pc(), |
| 2294 | resumeMode, vp); |
| 2295 | } |
| 2296 | |
| 2297 | bool Debugger::fireEnterFrame(JSContext* cx, ResumeMode& resumeMode, |
| 2298 | MutableHandleValue vp) { |
| 2299 | RootedObject hook(cx, getHook(OnEnterFrame)); |
| 2300 | MOZ_ASSERT(hook)do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(hook))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("hook", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2300); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook" ")"); do { *((volatile int*)__null) = 2300; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2301 | MOZ_ASSERT(hook->isCallable())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook->isCallable())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hook->isCallable()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("hook->isCallable()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2301); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook->isCallable()" ")"); do { *((volatile int*)__null) = 2301; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2302 | |
| 2303 | RootedValue scriptFrame(cx); |
| 2304 | |
| 2305 | FrameIter iter(cx); |
| 2306 | |
| 2307 | #if DEBUG1 |
| 2308 | // Assert that the hook won't be able to re-enter the generator. |
| 2309 | if (iter.hasScript() && JSOp(*iter.pc()) == JSOp::AfterYield) { |
| 2310 | AutoRealm ar(cx, iter.script()); |
| 2311 | auto* genObj = GetGeneratorObjectForFrame(cx, iter.abstractFramePtr()); |
| 2312 | MOZ_ASSERT(genObj->isRunning())do { static_assert( mozilla::detail::AssertionConditionType< decltype(genObj->isRunning())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(genObj->isRunning()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("genObj->isRunning()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2312); AnnotateMozCrashReason("MOZ_ASSERT" "(" "genObj->isRunning()" ")"); do { *((volatile int*)__null) = 2312; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2313 | } |
| 2314 | #endif |
| 2315 | |
| 2316 | if (!getFrame(cx, iter, &scriptFrame)) { |
| 2317 | return false; |
| 2318 | } |
| 2319 | |
| 2320 | RootedValue fval(cx, ObjectValue(*hook)); |
| 2321 | RootedValue rv(cx); |
| 2322 | bool ok = js::Call(cx, fval, object, scriptFrame, &rv); |
| 2323 | |
| 2324 | return processHandlerResult(cx, ok, rv, iter.abstractFramePtr(), iter.pc(), |
| 2325 | resumeMode, vp); |
| 2326 | } |
| 2327 | |
| 2328 | bool Debugger::fireNativeCall(JSContext* cx, const CallArgs& args, |
| 2329 | CallReason reason, ResumeMode& resumeMode, |
| 2330 | MutableHandleValue vp) { |
| 2331 | RootedObject hook(cx, getHook(OnNativeCall)); |
| 2332 | MOZ_ASSERT(hook)do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(hook))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("hook", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2332); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook" ")"); do { *((volatile int*)__null) = 2332; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2333 | MOZ_ASSERT(hook->isCallable())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook->isCallable())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hook->isCallable()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("hook->isCallable()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2333); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook->isCallable()" ")"); do { *((volatile int*)__null) = 2333; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2334 | |
| 2335 | RootedValue fval(cx, ObjectValue(*hook)); |
| 2336 | RootedValue calleeval(cx, args.calleev()); |
| 2337 | if (!wrapDebuggeeValue(cx, &calleeval)) { |
| 2338 | return false; |
| 2339 | } |
| 2340 | |
| 2341 | JSAtom* reasonAtom = nullptr; |
| 2342 | switch (reason) { |
| 2343 | case CallReason::Call: |
| 2344 | reasonAtom = cx->names().call; |
| 2345 | break; |
| 2346 | case CallReason::CallContent: |
| 2347 | reasonAtom = cx->names().call; |
| 2348 | break; |
| 2349 | case CallReason::FunCall: |
| 2350 | reasonAtom = cx->names().call; |
| 2351 | break; |
| 2352 | case CallReason::Getter: |
| 2353 | reasonAtom = cx->names().get; |
| 2354 | break; |
| 2355 | case CallReason::Setter: |
| 2356 | reasonAtom = cx->names().set; |
| 2357 | break; |
| 2358 | } |
| 2359 | MOZ_ASSERT(AtomIsMarked(cx->zone(), reasonAtom))do { static_assert( mozilla::detail::AssertionConditionType< decltype(AtomIsMarked(cx->zone(), reasonAtom))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(AtomIsMarked(cx->zone(), reasonAtom)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("AtomIsMarked(cx->zone(), reasonAtom)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2359); AnnotateMozCrashReason("MOZ_ASSERT" "(" "AtomIsMarked(cx->zone(), reasonAtom)" ")"); do { *((volatile int*)__null) = 2359; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2360 | |
| 2361 | RootedValue reasonval(cx, StringValue(reasonAtom)); |
| 2362 | |
| 2363 | bool ok = false; |
| 2364 | RootedValue rv(cx); |
| 2365 | if (inspectNativeCallArguments) { |
| 2366 | RootedValue thisVal(cx, args.thisv()); |
| 2367 | // Ignore anything that may make wrapDebuggeeValue to throw |
| 2368 | if (thisVal.isMagic() && thisVal.whyMagic() != JS_MISSING_ARGUMENTS && |
| 2369 | thisVal.whyMagic() != JS_UNINITIALIZED_LEXICAL) { |
| 2370 | thisVal.setMagic(JS_OPTIMIZED_OUT); |
| 2371 | } |
| 2372 | if (!wrapDebuggeeValue(cx, &thisVal)) { |
| 2373 | return false; |
| 2374 | } |
| 2375 | |
| 2376 | unsigned arrsize = args.length(); |
| 2377 | Rooted<ArrayObject*> arrobj(cx, NewDenseFullyAllocatedArray(cx, arrsize)); |
| 2378 | if (!arrobj) { |
| 2379 | return false; |
| 2380 | } |
| 2381 | arrobj->ensureDenseInitializedLength(0, arrsize); |
| 2382 | for (unsigned i = 0; i < arrsize; i++) { |
| 2383 | RootedValue v(cx, args.get(i)); |
| 2384 | if (!wrapDebuggeeValue(cx, &v)) { |
| 2385 | return false; |
| 2386 | } |
| 2387 | arrobj->setDenseElement(i, v); |
| 2388 | } |
| 2389 | RootedValue arrayval(cx, ObjectValue(*arrobj)); |
| 2390 | if (!wrapDebuggeeValue(cx, &arrayval)) { |
| 2391 | return false; |
| 2392 | } |
| 2393 | |
| 2394 | FixedInvokeArgs<4> iargs(cx); |
| 2395 | iargs[0].set(calleeval); |
| 2396 | iargs[1].set(reasonval); |
| 2397 | iargs[2].set(thisVal); |
| 2398 | iargs[3].set(arrayval); |
| 2399 | |
| 2400 | RootedValue thisv(cx, ObjectOrNullValue(object)); |
| 2401 | ok = js::Call(cx, fval, thisv, iargs, &rv); |
| 2402 | } else { |
| 2403 | ok = js::Call(cx, fval, object, calleeval, reasonval, &rv); |
| 2404 | } |
| 2405 | |
| 2406 | return processHandlerResult(cx, ok, rv, NullFramePtr(), nullptr, resumeMode, |
| 2407 | vp); |
| 2408 | } |
| 2409 | |
| 2410 | bool Debugger::fireNewScript(JSContext* cx, |
| 2411 | Handle<DebuggerScriptReferent> scriptReferent) { |
| 2412 | RootedObject hook(cx, getHook(OnNewScript)); |
| 2413 | MOZ_ASSERT(hook)do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(hook))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("hook", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2413); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook" ")"); do { *((volatile int*)__null) = 2413; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2414 | MOZ_ASSERT(hook->isCallable())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook->isCallable())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hook->isCallable()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("hook->isCallable()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2414); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook->isCallable()" ")"); do { *((volatile int*)__null) = 2414; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2415 | |
| 2416 | JSObject* dsobj = wrapVariantReferent(cx, scriptReferent); |
| 2417 | if (!dsobj) { |
| 2418 | return false; |
| 2419 | } |
| 2420 | |
| 2421 | RootedValue fval(cx, ObjectValue(*hook)); |
| 2422 | RootedValue dsval(cx, ObjectValue(*dsobj)); |
| 2423 | RootedValue rv(cx); |
| 2424 | return js::Call(cx, fval, object, dsval, &rv) || handleUncaughtException(cx); |
| 2425 | } |
| 2426 | |
| 2427 | bool Debugger::fireOnGarbageCollectionHook( |
| 2428 | JSContext* cx, const JS::dbg::GarbageCollectionEvent::Ptr& gcData) { |
| 2429 | MOZ_ASSERT(observedGC(gcData->majorGCNumber()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(observedGC(gcData->majorGCNumber()))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(observedGC(gcData->majorGCNumber())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("observedGC(gcData->majorGCNumber())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2429); AnnotateMozCrashReason("MOZ_ASSERT" "(" "observedGC(gcData->majorGCNumber())" ")"); do { *((volatile int*)__null) = 2429; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2430 | observedGCs.remove(gcData->majorGCNumber()); |
| 2431 | |
| 2432 | RootedObject hook(cx, getHook(OnGarbageCollection)); |
| 2433 | MOZ_ASSERT(hook)do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(hook))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("hook", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2433); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook" ")"); do { *((volatile int*)__null) = 2433; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2434 | MOZ_ASSERT(hook->isCallable())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook->isCallable())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hook->isCallable()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("hook->isCallable()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2434); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook->isCallable()" ")"); do { *((volatile int*)__null) = 2434; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2435 | |
| 2436 | JSObject* dataObj = gcData->toJSObject(cx); |
| 2437 | if (!dataObj) { |
| 2438 | return false; |
| 2439 | } |
| 2440 | |
| 2441 | RootedValue fval(cx, ObjectValue(*hook)); |
| 2442 | RootedValue dataVal(cx, ObjectValue(*dataObj)); |
| 2443 | RootedValue rv(cx); |
| 2444 | return js::Call(cx, fval, object, dataVal, &rv) || |
| 2445 | handleUncaughtException(cx); |
| 2446 | } |
| 2447 | |
| 2448 | template <typename HookIsEnabledFun /* bool (Debugger*) */, |
| 2449 | typename FireHookFun /* bool (Debugger*) */> |
| 2450 | /* static */ |
| 2451 | void Debugger::dispatchQuietHook(JSContext* cx, HookIsEnabledFun hookIsEnabled, |
| 2452 | FireHookFun fireHook) { |
| 2453 | DebuggerList<HookIsEnabledFun> debuggerList(cx, hookIsEnabled); |
| 2454 | |
| 2455 | if (!debuggerList.init(cx)) { |
| 2456 | // init may fail due to OOM. This OOM is not handlable at the |
| 2457 | // callsites of dispatchQuietHook in the engine. |
| 2458 | cx->clearPendingException(); |
| 2459 | return; |
| 2460 | } |
| 2461 | |
| 2462 | debuggerList.dispatchQuietHook(cx, fireHook); |
| 2463 | } |
| 2464 | |
| 2465 | template <typename HookIsEnabledFun /* bool (Debugger*) */, typename FireHookFun /* bool (Debugger*, ResumeMode&, MutableHandleValue vp) */> |
| 2466 | /* static */ |
| 2467 | bool Debugger::dispatchResumptionHook(JSContext* cx, AbstractFramePtr frame, |
| 2468 | HookIsEnabledFun hookIsEnabled, |
| 2469 | FireHookFun fireHook) { |
| 2470 | DebuggerList<HookIsEnabledFun> debuggerList(cx, hookIsEnabled); |
| 2471 | |
| 2472 | if (!debuggerList.init(cx)) { |
| 2473 | return false; |
| 2474 | } |
| 2475 | |
| 2476 | return debuggerList.dispatchResumptionHook(cx, frame, fireHook); |
| 2477 | } |
| 2478 | |
| 2479 | // Maximum length for source URLs that can be remembered. |
| 2480 | static const size_t SourceURLMaxLength = 1024; |
| 2481 | |
| 2482 | // Maximum number of source URLs that can be remembered in a realm. |
| 2483 | static const size_t SourceURLRealmLimit = 100; |
| 2484 | |
| 2485 | static bool RememberSourceURL(JSContext* cx, HandleScript script) { |
| 2486 | cx->check(script); |
| 2487 | |
| 2488 | // Sources introduced dynamically are not remembered. |
| 2489 | if (script->sourceObject()->unwrappedIntroductionScript()) { |
| 2490 | return true; |
| 2491 | } |
| 2492 | |
| 2493 | const char* filename = script->filename(); |
| 2494 | if (!filename || |
| 2495 | strnlen(filename, SourceURLMaxLength + 1) > SourceURLMaxLength) { |
| 2496 | return true; |
| 2497 | } |
| 2498 | |
| 2499 | Rooted<ArrayObject*> holder(cx, script->global().getSourceURLsHolder()); |
| 2500 | if (!holder) { |
| 2501 | holder = NewDenseEmptyArray(cx); |
| 2502 | if (!holder) { |
| 2503 | return false; |
| 2504 | } |
| 2505 | script->global().setSourceURLsHolder(holder); |
| 2506 | } |
| 2507 | |
| 2508 | if (holder->length() >= SourceURLRealmLimit) { |
| 2509 | return true; |
| 2510 | } |
| 2511 | |
| 2512 | RootedString filenameString(cx, |
| 2513 | AtomizeUTF8Chars(cx, filename, strlen(filename))); |
| 2514 | if (!filenameString) { |
| 2515 | return false; |
| 2516 | } |
| 2517 | |
| 2518 | // The source URLs holder never escapes to script, so we can treat it as a |
| 2519 | // newborn array for the purpose of adding elements. |
| 2520 | return NewbornArrayPush(cx, holder, StringValue(filenameString)); |
| 2521 | } |
| 2522 | |
| 2523 | void DebugAPI::onNewScript(JSContext* cx, HandleScript script) { |
| 2524 | if (!script->realm()->isDebuggee()) { |
| 2525 | // Remember the URLs associated with scripts in non-system realms, |
| 2526 | // in case the debugger is attached later. |
| 2527 | if (!script->realm()->isSystem()) { |
| 2528 | if (!RememberSourceURL(cx, script)) { |
| 2529 | cx->clearPendingException(); |
| 2530 | } |
| 2531 | } |
| 2532 | return; |
| 2533 | } |
| 2534 | |
| 2535 | Debugger::dispatchQuietHook( |
| 2536 | cx, |
| 2537 | [script](Debugger* dbg) -> bool { |
| 2538 | return dbg->observesNewScript() && dbg->observesScript(script); |
| 2539 | }, |
| 2540 | [&](Debugger* dbg) -> bool { |
| 2541 | BaseScript* base = script.get(); |
| 2542 | Rooted<DebuggerScriptReferent> scriptReferent(cx, base); |
| 2543 | return dbg->fireNewScript(cx, scriptReferent); |
| 2544 | }); |
| 2545 | } |
| 2546 | |
| 2547 | /* static */ |
| 2548 | void DebugAPI::onSuspendWasmFrame(JSContext* cx, wasm::DebugFrame* debugFrame) { |
| 2549 | AbstractFramePtr frame = AbstractFramePtr(debugFrame); |
| 2550 | JS::AutoAssertNoGC nogc; |
| 2551 | for (Realm::DebuggerVectorEntry& entry : frame.global()->getDebuggers(nogc)) { |
| 2552 | Debugger* dbg = entry.dbg; |
| 2553 | if (Debugger::FrameMap::Ptr p = dbg->frames.lookup(frame)) { |
| 2554 | DebuggerFrame* frameObj = p->value(); |
| 2555 | frameObj->suspendWasmFrame(cx->gcContext()); |
| 2556 | } |
| 2557 | } |
| 2558 | } |
| 2559 | |
| 2560 | /* static */ |
| 2561 | void DebugAPI::onResumeWasmFrame(JSContext* cx, const FrameIter& iter) { |
| 2562 | AbstractFramePtr frame = iter.abstractFramePtr(); |
| 2563 | MOZ_RELEASE_ASSERT(frame.isWasmDebugFrame())do { static_assert( mozilla::detail::AssertionConditionType< decltype(frame.isWasmDebugFrame())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(frame.isWasmDebugFrame()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("frame.isWasmDebugFrame()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2563); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "frame.isWasmDebugFrame()" ")"); do { *((volatile int*)__null) = 2563; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2564 | JS::AutoAssertNoGC nogc; |
| 2565 | for (Realm::DebuggerVectorEntry& entry : frame.global()->getDebuggers(nogc)) { |
| 2566 | Debugger* dbg = entry.dbg; |
| 2567 | if (Debugger::FrameMap::Ptr p = dbg->frames.lookup(frame)) { |
| 2568 | DebuggerFrame* frameObj = p->value(); |
| 2569 | AutoEnterOOMUnsafeRegion oomUnsafe; |
| 2570 | if (!frameObj->resume(iter)) { |
| 2571 | oomUnsafe.crash("DebugAPI::onResumeWasmFrame"); |
| 2572 | } |
| 2573 | } |
| 2574 | } |
| 2575 | } |
| 2576 | |
| 2577 | void DebugAPI::slowPathOnNewWasmInstance( |
| 2578 | JSContext* cx, Handle<WasmInstanceObject*> wasmInstance) { |
| 2579 | Debugger::dispatchQuietHook( |
| 2580 | cx, |
| 2581 | [wasmInstance](Debugger* dbg) -> bool { |
| 2582 | return dbg->observesNewScript() && |
| 2583 | dbg->observesGlobal(&wasmInstance->global()); |
| 2584 | }, |
| 2585 | [&](Debugger* dbg) -> bool { |
| 2586 | Rooted<DebuggerScriptReferent> scriptReferent(cx, wasmInstance.get()); |
| 2587 | return dbg->fireNewScript(cx, scriptReferent); |
| 2588 | }); |
| 2589 | } |
| 2590 | |
| 2591 | /* static */ |
| 2592 | bool DebugAPI::onTrap(JSContext* cx) { |
| 2593 | FrameIter iter(cx); |
| 2594 | JS::AutoSaveExceptionState savedExc(cx); |
| 2595 | Rooted<GlobalObject*> global(cx); |
| 2596 | BreakpointSite* site; |
| 2597 | bool isJS; // true when iter.hasScript(), false when iter.isWasm() |
| 2598 | jsbytecode* pc; // valid when isJS == true |
| 2599 | uint32_t bytecodeOffset; // valid when isJS == false |
| 2600 | if (iter.hasScript()) { |
| 2601 | RootedScript script(cx, iter.script()); |
| 2602 | MOZ_ASSERT(script->isDebuggee())do { static_assert( mozilla::detail::AssertionConditionType< decltype(script->isDebuggee())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(script->isDebuggee()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("script->isDebuggee()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2602); AnnotateMozCrashReason("MOZ_ASSERT" "(" "script->isDebuggee()" ")"); do { *((volatile int*)__null) = 2602; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2603 | global.set(&script->global()); |
| 2604 | isJS = true; |
| 2605 | pc = iter.pc(); |
| 2606 | bytecodeOffset = 0; |
| 2607 | site = DebugScript::getBreakpointSite(script, pc); |
| 2608 | } else { |
| 2609 | MOZ_ASSERT(iter.isWasm())do { static_assert( mozilla::detail::AssertionConditionType< decltype(iter.isWasm())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(iter.isWasm()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("iter.isWasm()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2609); AnnotateMozCrashReason("MOZ_ASSERT" "(" "iter.isWasm()" ")"); do { *((volatile int*)__null) = 2609; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2610 | global.set(&iter.wasmInstance()->object()->global()); |
| 2611 | isJS = false; |
| 2612 | pc = nullptr; |
| 2613 | bytecodeOffset = iter.wasmBytecodeOffset(); |
| 2614 | site = iter.wasmInstance()->debug().getBreakpointSite(bytecodeOffset); |
| 2615 | } |
| 2616 | |
| 2617 | // Build list of breakpoint handlers. |
| 2618 | // |
| 2619 | // This does not need to be rooted: since the JSScript/WasmInstance is on the |
| 2620 | // stack, the Breakpoints will not be GC'd. However, they may be deleted, and |
| 2621 | // we check for that case below. |
| 2622 | Vector<Breakpoint*> triggered(cx); |
| 2623 | for (Breakpoint* bp = site->firstBreakpoint(); bp; bp = bp->nextInSite()) { |
| 2624 | if (!triggered.append(bp)) { |
| 2625 | return false; |
| 2626 | } |
| 2627 | } |
| 2628 | |
| 2629 | ResumeMode resumeMode = ResumeMode::Continue; |
| 2630 | RootedValue rval(cx); |
| 2631 | |
| 2632 | if (triggered.length() > 0) { |
| 2633 | // Preserve the debuggee's microtask event queue while we run the hooks, so |
| 2634 | // the debugger's microtask checkpoints don't run from the debuggee's |
| 2635 | // microtasks, and vice versa. |
| 2636 | JS::AutoDebuggerJobQueueInterruption adjqi; |
| 2637 | if (!adjqi.init(cx)) { |
| 2638 | return false; |
| 2639 | } |
| 2640 | |
| 2641 | for (Breakpoint* bp : triggered) { |
| 2642 | // Handlers can clear breakpoints. Check that bp still exists. |
| 2643 | if (!site || !site->hasBreakpoint(bp)) { |
| 2644 | continue; |
| 2645 | } |
| 2646 | |
| 2647 | // We have to check whether dbg is debugging this global here: a |
| 2648 | // breakpoint handler can disable other Debuggers or remove debuggees. |
| 2649 | Debugger* dbg = bp->debugger; |
| 2650 | if (dbg->debuggees.has(global)) { |
| 2651 | EnterDebuggeeNoExecute nx(cx, *dbg, adjqi); |
| 2652 | |
| 2653 | bool result = dbg->enterDebuggerHook(cx, [&]() -> bool { |
| 2654 | RootedValue scriptFrame(cx); |
| 2655 | if (!dbg->getFrame(cx, iter, &scriptFrame)) { |
| 2656 | return false; |
| 2657 | } |
| 2658 | |
| 2659 | // Re-wrap the breakpoint's handler for the Debugger's compartment. |
| 2660 | // When the handler and the Debugger are in the same compartment (the |
| 2661 | // usual case), this actually unwraps it, but there's no requirement |
| 2662 | // that they be in the same compartment, so we can't be sure. |
| 2663 | Rooted<JSObject*> handler(cx, bp->handler); |
| 2664 | if (!cx->compartment()->wrap(cx, &handler)) { |
| 2665 | return false; |
| 2666 | } |
| 2667 | |
| 2668 | RootedValue rv(cx); |
| 2669 | bool ok = CallMethodIfPresent(cx, handler, "hit", 1, |
| 2670 | scriptFrame.address(), &rv); |
| 2671 | |
| 2672 | return dbg->processHandlerResult(cx, ok, rv, iter.abstractFramePtr(), |
| 2673 | iter.pc(), resumeMode, &rval); |
| 2674 | }); |
| 2675 | adjqi.runJobs(); |
| 2676 | |
| 2677 | if (!result) { |
| 2678 | return false; |
| 2679 | } |
| 2680 | |
| 2681 | // Calling JS code invalidates site. Reload it. |
| 2682 | if (isJS) { |
| 2683 | site = DebugScript::getBreakpointSite(iter.script(), pc); |
| 2684 | } else { |
| 2685 | site = iter.wasmInstance()->debug().getBreakpointSite(bytecodeOffset); |
| 2686 | } |
| 2687 | } |
| 2688 | } |
| 2689 | } |
| 2690 | |
| 2691 | if (!ApplyFrameResumeMode(cx, iter.abstractFramePtr(), resumeMode, rval)) { |
| 2692 | savedExc.drop(); |
| 2693 | return false; |
| 2694 | } |
| 2695 | return true; |
| 2696 | } |
| 2697 | |
| 2698 | /* static */ |
| 2699 | bool DebugAPI::onSingleStep(JSContext* cx) { |
| 2700 | FrameIter iter(cx); |
| 2701 | |
| 2702 | // We may be stepping over a JSOp::Exception, that pushes the context's |
| 2703 | // pending exception for a 'catch' clause to handle. Don't let the onStep |
| 2704 | // handlers mess with that (other than by returning a resumption value). |
| 2705 | JS::AutoSaveExceptionState savedExc(cx); |
| 2706 | |
| 2707 | // Build list of Debugger.Frame instances referring to this frame with |
| 2708 | // onStep handlers. |
| 2709 | Rooted<Debugger::DebuggerFrameVector> frames(cx); |
| 2710 | if (!Debugger::getDebuggerFrames(iter.abstractFramePtr(), &frames)) { |
| 2711 | ReportOutOfMemory(cx); |
| 2712 | return false; |
| 2713 | } |
| 2714 | |
| 2715 | #ifdef DEBUG1 |
| 2716 | // Validate the single-step count on this frame's script, to ensure that |
| 2717 | // we're not receiving traps we didn't ask for. Even when frames is |
| 2718 | // non-empty (and thus we know this trap was requested), do the check |
| 2719 | // anyway, to make sure the count has the correct non-zero value. |
| 2720 | // |
| 2721 | // The converse --- ensuring that we do receive traps when we should --- can |
| 2722 | // be done with unit tests. |
| 2723 | if (iter.hasScript()) { |
| 2724 | uint32_t liveStepperCount = 0; |
| 2725 | uint32_t suspendedStepperCount = 0; |
| 2726 | JSScript* trappingScript = iter.script(); |
| 2727 | JS::AutoAssertNoGC nogc; |
| 2728 | for (Realm::DebuggerVectorEntry& entry : cx->global()->getDebuggers(nogc)) { |
| 2729 | Debugger* dbg = entry.dbg; |
| 2730 | for (Debugger::FrameMap::Range r = dbg->frames.all(); !r.empty(); |
| 2731 | r.popFront()) { |
| 2732 | AbstractFramePtr frame = r.front().key(); |
| 2733 | NativeObject* frameobj = r.front().value(); |
| 2734 | if (frame.isWasmDebugFrame()) { |
| 2735 | continue; |
| 2736 | } |
| 2737 | if (frame.script() == trappingScript && |
| 2738 | !frameobj->getReservedSlot(DebuggerFrame::ONSTEP_HANDLER_SLOT) |
| 2739 | .isUndefined()) { |
| 2740 | liveStepperCount++; |
| 2741 | } |
| 2742 | } |
| 2743 | |
| 2744 | // Also count hooks set on suspended generator frames. |
| 2745 | for (Debugger::GeneratorWeakMap::Range r = dbg->generatorFrames.all(); |
| 2746 | !r.empty(); r.popFront()) { |
| 2747 | AbstractGeneratorObject& genObj = *r.front().key(); |
| 2748 | DebuggerFrame& frameObj = *r.front().value(); |
| 2749 | MOZ_ASSERT(&frameObj.unwrappedGenerator() == &genObj)do { static_assert( mozilla::detail::AssertionConditionType< decltype(&frameObj.unwrappedGenerator() == &genObj)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(&frameObj.unwrappedGenerator() == &genObj))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("&frameObj.unwrappedGenerator() == &genObj" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2749); AnnotateMozCrashReason("MOZ_ASSERT" "(" "&frameObj.unwrappedGenerator() == &genObj" ")"); do { *((volatile int*)__null) = 2749; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2750 | |
| 2751 | // Live Debugger.Frames were already counted in dbg->frames loop. |
| 2752 | if (frameObj.isOnStack()) { |
| 2753 | continue; |
| 2754 | } |
| 2755 | |
| 2756 | // A closed generator no longer has a callee so it will not be able to |
| 2757 | // compare with the trappingScript. |
| 2758 | if (genObj.isClosed()) { |
| 2759 | continue; |
| 2760 | } |
| 2761 | |
| 2762 | // If a frame isn't live, but it has an entry in generatorFrames, |
| 2763 | // it had better be suspended. |
| 2764 | MOZ_ASSERT(genObj.isSuspended())do { static_assert( mozilla::detail::AssertionConditionType< decltype(genObj.isSuspended())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(genObj.isSuspended()))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("genObj.isSuspended()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2764); AnnotateMozCrashReason("MOZ_ASSERT" "(" "genObj.isSuspended()" ")"); do { *((volatile int*)__null) = 2764; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2765 | |
| 2766 | if (genObj.callee().hasBaseScript() && |
| 2767 | genObj.callee().baseScript() == trappingScript && |
| 2768 | !frameObj.getReservedSlot(DebuggerFrame::ONSTEP_HANDLER_SLOT) |
| 2769 | .isUndefined()) { |
| 2770 | suspendedStepperCount++; |
| 2771 | } |
| 2772 | } |
| 2773 | } |
| 2774 | |
| 2775 | MOZ_ASSERT(liveStepperCount + suspendedStepperCount ==do { static_assert( mozilla::detail::AssertionConditionType< decltype(liveStepperCount + suspendedStepperCount == DebugScript ::getStepperCount(trappingScript))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(liveStepperCount + suspendedStepperCount == DebugScript::getStepperCount(trappingScript)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("liveStepperCount + suspendedStepperCount == DebugScript::getStepperCount(trappingScript)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2776); AnnotateMozCrashReason("MOZ_ASSERT" "(" "liveStepperCount + suspendedStepperCount == DebugScript::getStepperCount(trappingScript)" ")"); do { *((volatile int*)__null) = 2776; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 2776 | DebugScript::getStepperCount(trappingScript))do { static_assert( mozilla::detail::AssertionConditionType< decltype(liveStepperCount + suspendedStepperCount == DebugScript ::getStepperCount(trappingScript))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(liveStepperCount + suspendedStepperCount == DebugScript::getStepperCount(trappingScript)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("liveStepperCount + suspendedStepperCount == DebugScript::getStepperCount(trappingScript)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2776); AnnotateMozCrashReason("MOZ_ASSERT" "(" "liveStepperCount + suspendedStepperCount == DebugScript::getStepperCount(trappingScript)" ")"); do { *((volatile int*)__null) = 2776; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2777 | } |
| 2778 | #endif |
| 2779 | |
| 2780 | RootedValue rval(cx); |
| 2781 | ResumeMode resumeMode = ResumeMode::Continue; |
| 2782 | |
| 2783 | if (frames.length() > 0) { |
| 2784 | // Preserve the debuggee's microtask event queue while we run the hooks, so |
| 2785 | // the debugger's microtask checkpoints don't run from the debuggee's |
| 2786 | // microtasks, and vice versa. |
| 2787 | JS::AutoDebuggerJobQueueInterruption adjqi; |
| 2788 | if (!adjqi.init(cx)) { |
| 2789 | return false; |
| 2790 | } |
| 2791 | |
| 2792 | // Call onStep for frames that have the handler set. |
| 2793 | for (size_t i = 0; i < frames.length(); i++) { |
| 2794 | Handle<DebuggerFrame*> frame = frames[i]; |
| 2795 | OnStepHandler* handler = frame->onStepHandler(); |
| 2796 | if (!handler) { |
| 2797 | continue; |
| 2798 | } |
| 2799 | |
| 2800 | Debugger* dbg = frame->owner(); |
| 2801 | EnterDebuggeeNoExecute nx(cx, *dbg, adjqi); |
| 2802 | |
| 2803 | bool result = dbg->enterDebuggerHook(cx, [&]() -> bool { |
| 2804 | ResumeMode nextResumeMode = ResumeMode::Continue; |
| 2805 | RootedValue nextValue(cx); |
| 2806 | |
| 2807 | bool success = handler->onStep(cx, frame, nextResumeMode, &nextValue); |
| 2808 | return dbg->processParsedHandlerResult( |
| 2809 | cx, iter.abstractFramePtr(), iter.pc(), success, nextResumeMode, |
| 2810 | nextValue, resumeMode, &rval); |
| 2811 | }); |
| 2812 | adjqi.runJobs(); |
| 2813 | |
| 2814 | if (!result) { |
| 2815 | return false; |
| 2816 | } |
| 2817 | } |
| 2818 | } |
| 2819 | |
| 2820 | if (!ApplyFrameResumeMode(cx, iter.abstractFramePtr(), resumeMode, rval)) { |
| 2821 | savedExc.drop(); |
| 2822 | return false; |
| 2823 | } |
| 2824 | return true; |
| 2825 | } |
| 2826 | |
| 2827 | bool Debugger::fireNewGlobalObject(JSContext* cx, |
| 2828 | Handle<GlobalObject*> global) { |
| 2829 | RootedObject hook(cx, getHook(OnNewGlobalObject)); |
| 2830 | MOZ_ASSERT(hook)do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(hook))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("hook", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2830); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook" ")"); do { *((volatile int*)__null) = 2830; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2831 | MOZ_ASSERT(hook->isCallable())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook->isCallable())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hook->isCallable()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("hook->isCallable()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2831); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook->isCallable()" ")"); do { *((volatile int*)__null) = 2831; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2832 | |
| 2833 | RootedValue wrappedGlobal(cx, ObjectValue(*global)); |
| 2834 | if (!wrapDebuggeeValue(cx, &wrappedGlobal)) { |
| 2835 | return false; |
| 2836 | } |
| 2837 | |
| 2838 | // onNewGlobalObject is infallible, and thus is only allowed to return |
| 2839 | // undefined as a resumption value. If it returns anything else, we throw. |
| 2840 | // And if that happens, or if the hook itself throws, we invoke the |
| 2841 | // uncaughtExceptionHook so that we never leave an exception pending on the |
| 2842 | // cx. This allows JS_NewGlobalObject to avoid handling failures from |
| 2843 | // debugger hooks. |
| 2844 | RootedValue rv(cx); |
| 2845 | RootedValue fval(cx, ObjectValue(*hook)); |
| 2846 | bool ok = js::Call(cx, fval, object, wrappedGlobal, &rv); |
| 2847 | if (ok && !rv.isUndefined()) { |
| 2848 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 2849 | JSMSG_DEBUG_RESUMPTION_VALUE_DISALLOWED); |
| 2850 | ok = false; |
| 2851 | } |
| 2852 | |
| 2853 | return ok || handleUncaughtException(cx); |
| 2854 | } |
| 2855 | |
| 2856 | void DebugAPI::slowPathOnNewGlobalObject(JSContext* cx, |
| 2857 | Handle<GlobalObject*> global) { |
| 2858 | MOZ_ASSERT(!cx->runtime()->onNewGlobalObjectWatchers().isEmpty())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!cx->runtime()->onNewGlobalObjectWatchers().isEmpty ())>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!cx->runtime()->onNewGlobalObjectWatchers().isEmpty ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!cx->runtime()->onNewGlobalObjectWatchers().isEmpty()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2858); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!cx->runtime()->onNewGlobalObjectWatchers().isEmpty()" ")"); do { *((volatile int*)__null) = 2858; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2859 | if (global->realm()->creationOptions().invisibleToDebugger()) { |
| 2860 | return; |
| 2861 | } |
| 2862 | |
| 2863 | // Make a copy of the runtime's onNewGlobalObjectWatchers before running the |
| 2864 | // handlers. Since one Debugger's handler can disable another's, the list |
| 2865 | // can be mutated while we're walking it. |
| 2866 | RootedObjectVector watchers(cx); |
| 2867 | for (auto& dbg : cx->runtime()->onNewGlobalObjectWatchers()) { |
| 2868 | MOZ_ASSERT(dbg.observesNewGlobalObject())do { static_assert( mozilla::detail::AssertionConditionType< decltype(dbg.observesNewGlobalObject())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(dbg.observesNewGlobalObject( )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("dbg.observesNewGlobalObject()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2868); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dbg.observesNewGlobalObject()" ")"); do { *((volatile int*)__null) = 2868; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2869 | JSObject* obj = dbg.object; |
| 2870 | JS::ExposeObjectToActiveJS(obj); |
| 2871 | if (!watchers.append(obj)) { |
| 2872 | if (cx->isExceptionPending()) { |
| 2873 | cx->clearPendingException(); |
| 2874 | } |
| 2875 | return; |
| 2876 | } |
| 2877 | } |
| 2878 | |
| 2879 | // Preserve the debuggee's microtask event queue while we run the hooks, so |
| 2880 | // the debugger's microtask checkpoints don't run from the debuggee's |
| 2881 | // microtasks, and vice versa. |
| 2882 | JS::AutoDebuggerJobQueueInterruption adjqi; |
| 2883 | if (!adjqi.init(cx)) { |
| 2884 | cx->clearPendingException(); |
| 2885 | return; |
| 2886 | } |
| 2887 | |
| 2888 | for (size_t i = 0; i < watchers.length(); i++) { |
| 2889 | Debugger* dbg = Debugger::fromJSObject(watchers[i]); |
| 2890 | EnterDebuggeeNoExecute nx(cx, *dbg, adjqi); |
| 2891 | |
| 2892 | if (dbg->observesNewGlobalObject()) { |
| 2893 | bool result = dbg->enterDebuggerHook( |
| 2894 | cx, [&]() -> bool { return dbg->fireNewGlobalObject(cx, global); }); |
| 2895 | adjqi.runJobs(); |
| 2896 | |
| 2897 | if (!result) { |
| 2898 | // Like other quiet hooks using dispatchQuietHook, this hook |
| 2899 | // silently ignores all errors that propagate out of it and aren't |
| 2900 | // already handled by the hook error reporting. |
| 2901 | cx->clearPendingException(); |
| 2902 | break; |
| 2903 | } |
| 2904 | } |
| 2905 | } |
| 2906 | MOZ_ASSERT(!cx->isExceptionPending())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!cx->isExceptionPending())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!cx->isExceptionPending() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!cx->isExceptionPending()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2906); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!cx->isExceptionPending()" ")"); do { *((volatile int*)__null) = 2906; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2907 | } |
| 2908 | |
| 2909 | /* static */ |
| 2910 | void DebugAPI::slowPathOnGeneratorClosed(JSContext* cx, |
| 2911 | AbstractGeneratorObject* genObj) { |
| 2912 | JS::AutoAssertNoGC nogc; |
| 2913 | for (Realm::DebuggerVectorEntry& entry : cx->global()->getDebuggers(nogc)) { |
| 2914 | Debugger* dbg = entry.dbg; |
| 2915 | if (Debugger::GeneratorWeakMap::Ptr frameEntry = |
| 2916 | dbg->generatorFrames.lookup(genObj)) { |
| 2917 | DebuggerFrame* frameObj = frameEntry->value(); |
| 2918 | frameObj->onGeneratorClosed(cx->gcContext()); |
| 2919 | } |
| 2920 | } |
| 2921 | } |
| 2922 | |
| 2923 | /* static */ |
| 2924 | void DebugAPI::slowPathNotifyParticipatesInGC(uint64_t majorGCNumber, |
| 2925 | Realm::DebuggerVector& dbgs, |
| 2926 | const JS::AutoRequireNoGC& nogc) { |
| 2927 | for (Realm::DebuggerVector::Range r = dbgs.all(); !r.empty(); r.popFront()) { |
| 2928 | if (!r.front().dbg.unbarrieredGet()->debuggeeIsBeingCollected( |
| 2929 | majorGCNumber)) { |
| 2930 | #ifdef DEBUG1 |
| 2931 | fprintf(stderrstderr, |
| 2932 | "OOM while notifying observing Debuggers of a GC: The " |
| 2933 | "onGarbageCollection\n" |
| 2934 | "hook will not be fired for this GC for some Debuggers!\n"); |
| 2935 | #endif |
| 2936 | return; |
| 2937 | } |
| 2938 | } |
| 2939 | } |
| 2940 | |
| 2941 | /* static */ |
| 2942 | Maybe<double> DebugAPI::allocationSamplingProbability(GlobalObject* global) { |
| 2943 | JS::AutoAssertNoGC nogc; |
| 2944 | Realm::DebuggerVector& dbgs = global->getDebuggers(nogc); |
| 2945 | if (dbgs.empty()) { |
| 2946 | return Nothing(); |
| 2947 | } |
| 2948 | |
| 2949 | DebugOnly<Realm::DebuggerVectorEntry*> begin = dbgs.begin(); |
| 2950 | |
| 2951 | double probability = 0; |
| 2952 | bool foundAnyDebuggers = false; |
| 2953 | for (auto p = dbgs.begin(); p < dbgs.end(); p++) { |
| 2954 | // The set of debuggers had better not change while we're iterating, |
| 2955 | // such that the vector gets reallocated. |
| 2956 | MOZ_ASSERT(dbgs.begin() == begin)do { static_assert( mozilla::detail::AssertionConditionType< decltype(dbgs.begin() == begin)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(dbgs.begin() == begin))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("dbgs.begin() == begin" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2956); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dbgs.begin() == begin" ")"); do { *((volatile int*)__null) = 2956; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2957 | // Use unbarrieredGet() to prevent triggering read barrier while collecting, |
| 2958 | // this is safe as long as dbgp does not escape. |
| 2959 | Debugger* dbgp = p->dbg.unbarrieredGet(); |
| 2960 | |
| 2961 | if (dbgp->trackingAllocationSites) { |
| 2962 | foundAnyDebuggers = true; |
| 2963 | probability = std::max(dbgp->allocationSamplingProbability, probability); |
| 2964 | } |
| 2965 | } |
| 2966 | |
| 2967 | return foundAnyDebuggers ? Some(probability) : Nothing(); |
| 2968 | } |
| 2969 | |
| 2970 | /* static */ |
| 2971 | bool DebugAPI::slowPathOnLogAllocationSite(JSContext* cx, HandleObject obj, |
| 2972 | Handle<SavedFrame*> frame, |
| 2973 | mozilla::TimeStamp when, |
| 2974 | Realm::DebuggerVector& dbgs, |
| 2975 | const gc::AutoSuppressGC& nogc) { |
| 2976 | MOZ_ASSERT(!dbgs.empty())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!dbgs.empty())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!dbgs.empty()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!dbgs.empty()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2976); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!dbgs.empty()" ")"); do { *((volatile int*)__null) = 2976; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2977 | mozilla::DebugOnly<Realm::DebuggerVectorEntry*> begin = dbgs.begin(); |
| 2978 | |
| 2979 | // GC is suppressed so we can iterate over the debuggers; appendAllocationSite |
| 2980 | // calls Compartment::wrap, and thus could GC. |
| 2981 | |
| 2982 | for (auto p = dbgs.begin(); p < dbgs.end(); p++) { |
| 2983 | // The set of debuggers had better not change while we're iterating, |
| 2984 | // such that the vector gets reallocated. |
| 2985 | MOZ_ASSERT(dbgs.begin() == begin)do { static_assert( mozilla::detail::AssertionConditionType< decltype(dbgs.begin() == begin)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(dbgs.begin() == begin))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("dbgs.begin() == begin" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2985); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dbgs.begin() == begin" ")"); do { *((volatile int*)__null) = 2985; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2986 | |
| 2987 | if (p->dbg->trackingAllocationSites && |
| 2988 | !p->dbg->appendAllocationSite(cx, obj, frame, when)) { |
| 2989 | return false; |
| 2990 | } |
| 2991 | } |
| 2992 | |
| 2993 | return true; |
| 2994 | } |
| 2995 | |
| 2996 | bool Debugger::isDebuggeeUnbarriered(const Realm* realm) const { |
| 2997 | MOZ_ASSERT(realm)do { static_assert( mozilla::detail::AssertionConditionType< decltype(realm)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(realm))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("realm", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 2997); AnnotateMozCrashReason("MOZ_ASSERT" "(" "realm" ")") ; do { *((volatile int*)__null) = 2997; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 2998 | return realm->isDebuggee() && |
| 2999 | debuggees.has(realm->unsafeUnbarrieredMaybeGlobal()); |
| 3000 | } |
| 3001 | |
| 3002 | bool Debugger::appendAllocationSite(JSContext* cx, HandleObject obj, |
| 3003 | Handle<SavedFrame*> frame, |
| 3004 | mozilla::TimeStamp when) { |
| 3005 | MOZ_ASSERT(trackingAllocationSites)do { static_assert( mozilla::detail::AssertionConditionType< decltype(trackingAllocationSites)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(trackingAllocationSites))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("trackingAllocationSites" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3005); AnnotateMozCrashReason("MOZ_ASSERT" "(" "trackingAllocationSites" ")"); do { *((volatile int*)__null) = 3005; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3006 | |
| 3007 | AutoRealm ar(cx, object); |
| 3008 | RootedObject wrappedFrame(cx, frame); |
| 3009 | if (!cx->compartment()->wrap(cx, &wrappedFrame)) { |
| 3010 | return false; |
| 3011 | } |
| 3012 | |
| 3013 | auto className = obj->getClass()->name; |
| 3014 | auto size = |
| 3015 | JS::ubi::Node(obj.get()).size(cx->runtime()->debuggerMallocSizeOf); |
| 3016 | auto inNursery = gc::IsInsideNursery(obj); |
| 3017 | |
| 3018 | if (!allocationsLog.emplaceBack(wrappedFrame, when, className, size, |
| 3019 | inNursery)) { |
| 3020 | ReportOutOfMemory(cx); |
| 3021 | return false; |
| 3022 | } |
| 3023 | |
| 3024 | if (allocationsLog.length() > maxAllocationsLogLength) { |
| 3025 | allocationsLog.popFront(); |
| 3026 | MOZ_ASSERT(allocationsLog.length() == maxAllocationsLogLength)do { static_assert( mozilla::detail::AssertionConditionType< decltype(allocationsLog.length() == maxAllocationsLogLength)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(allocationsLog.length() == maxAllocationsLogLength)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("allocationsLog.length() == maxAllocationsLogLength" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3026); AnnotateMozCrashReason("MOZ_ASSERT" "(" "allocationsLog.length() == maxAllocationsLogLength" ")"); do { *((volatile int*)__null) = 3026; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3027 | allocationsLogOverflowed = true; |
| 3028 | } |
| 3029 | |
| 3030 | return true; |
| 3031 | } |
| 3032 | |
| 3033 | bool Debugger::firePromiseHook(JSContext* cx, Hook hook, HandleObject promise) { |
| 3034 | MOZ_ASSERT(hook == OnNewPromise || hook == OnPromiseSettled)do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook == OnNewPromise || hook == OnPromiseSettled)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(hook == OnNewPromise || hook == OnPromiseSettled))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("hook == OnNewPromise || hook == OnPromiseSettled" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3034); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook == OnNewPromise || hook == OnPromiseSettled" ")"); do { *((volatile int*)__null) = 3034; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3035 | |
| 3036 | RootedObject hookObj(cx, getHook(hook)); |
| 3037 | MOZ_ASSERT(hookObj)do { static_assert( mozilla::detail::AssertionConditionType< decltype(hookObj)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hookObj))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("hookObj", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3037); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hookObj" ")" ); do { *((volatile int*)__null) = 3037; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3038 | MOZ_ASSERT(hookObj->isCallable())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hookObj->isCallable())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hookObj->isCallable()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("hookObj->isCallable()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3038); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hookObj->isCallable()" ")"); do { *((volatile int*)__null) = 3038; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3039 | |
| 3040 | RootedValue dbgObj(cx, ObjectValue(*promise)); |
| 3041 | if (!wrapDebuggeeValue(cx, &dbgObj)) { |
| 3042 | return false; |
| 3043 | } |
| 3044 | |
| 3045 | // Like onNewGlobalObject, the Promise hooks are infallible and the comments |
| 3046 | // in |Debugger::fireNewGlobalObject| apply here as well. |
| 3047 | RootedValue fval(cx, ObjectValue(*hookObj)); |
| 3048 | RootedValue rv(cx); |
| 3049 | bool ok = js::Call(cx, fval, object, dbgObj, &rv); |
| 3050 | if (ok && !rv.isUndefined()) { |
| 3051 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 3052 | JSMSG_DEBUG_RESUMPTION_VALUE_DISALLOWED); |
| 3053 | ok = false; |
| 3054 | } |
| 3055 | |
| 3056 | return ok || handleUncaughtException(cx); |
| 3057 | } |
| 3058 | |
| 3059 | /* static */ |
| 3060 | void Debugger::slowPathPromiseHook(JSContext* cx, Hook hook, |
| 3061 | Handle<PromiseObject*> promise) { |
| 3062 | MOZ_ASSERT(hook == OnNewPromise || hook == OnPromiseSettled)do { static_assert( mozilla::detail::AssertionConditionType< decltype(hook == OnNewPromise || hook == OnPromiseSettled)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(hook == OnNewPromise || hook == OnPromiseSettled))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("hook == OnNewPromise || hook == OnPromiseSettled" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3062); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hook == OnNewPromise || hook == OnPromiseSettled" ")"); do { *((volatile int*)__null) = 3062; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3063 | |
| 3064 | if (hook == OnPromiseSettled) { |
| 3065 | // We should be in the right compartment, but for simplicity always enter |
| 3066 | // the promise's realm below. |
| 3067 | cx->check(promise); |
| 3068 | } |
| 3069 | |
| 3070 | AutoRealm ar(cx, promise); |
| 3071 | |
| 3072 | Debugger::dispatchQuietHook( |
| 3073 | cx, [hook](Debugger* dbg) -> bool { return dbg->getHook(hook); }, |
| 3074 | [&](Debugger* dbg) -> bool { |
| 3075 | return dbg->firePromiseHook(cx, hook, promise); |
| 3076 | }); |
| 3077 | } |
| 3078 | |
| 3079 | /* static */ |
| 3080 | void DebugAPI::slowPathOnNewPromise(JSContext* cx, |
| 3081 | Handle<PromiseObject*> promise) { |
| 3082 | Debugger::slowPathPromiseHook(cx, Debugger::OnNewPromise, promise); |
| 3083 | } |
| 3084 | |
| 3085 | /* static */ |
| 3086 | void DebugAPI::slowPathOnPromiseSettled(JSContext* cx, |
| 3087 | Handle<PromiseObject*> promise) { |
| 3088 | Debugger::slowPathPromiseHook(cx, Debugger::OnPromiseSettled, promise); |
| 3089 | } |
| 3090 | |
| 3091 | /*** Debugger code invalidation for observing execution *********************/ |
| 3092 | |
| 3093 | class MOZ_RAII ExecutionObservableRealms |
| 3094 | : public DebugAPI::ExecutionObservableSet { |
| 3095 | HashSet<Realm*> realms_; |
| 3096 | HashSet<Zone*> zones_; |
| 3097 | |
| 3098 | public: |
| 3099 | explicit ExecutionObservableRealms(JSContext* cx) : realms_(cx), zones_(cx) {} |
| 3100 | |
| 3101 | bool add(Realm* realm) { |
| 3102 | return realms_.put(realm) && zones_.put(realm->zone()); |
| 3103 | } |
| 3104 | |
| 3105 | using RealmRange = HashSet<Realm*>::Range; |
| 3106 | const HashSet<Realm*>* realms() const { return &realms_; } |
| 3107 | |
| 3108 | const HashSet<Zone*>* zones() const override { return &zones_; } |
| 3109 | bool shouldRecompileOrInvalidate(JSScript* script) const override { |
| 3110 | return script->hasBaselineScript() && realms_.has(script->realm()); |
| 3111 | } |
| 3112 | bool shouldMarkAsDebuggee(FrameIter& iter) const override { |
| 3113 | // AbstractFramePtr can't refer to non-remateralized Ion frames or |
| 3114 | // non-debuggee wasm frames, so if iter refers to one such, we know we |
| 3115 | // don't match. |
| 3116 | return iter.hasUsableAbstractFramePtr() && realms_.has(iter.realm()); |
| 3117 | } |
| 3118 | }; |
| 3119 | |
| 3120 | // Given a particular AbstractFramePtr F that has become observable, this |
| 3121 | // represents the stack frames that need to be bailed out or marked as |
| 3122 | // debuggees, and the scripts that need to be recompiled, taking inlining into |
| 3123 | // account. |
| 3124 | class MOZ_RAII ExecutionObservableFrame |
| 3125 | : public DebugAPI::ExecutionObservableSet { |
| 3126 | AbstractFramePtr frame_; |
| 3127 | |
| 3128 | public: |
| 3129 | explicit ExecutionObservableFrame(AbstractFramePtr frame) : frame_(frame) {} |
| 3130 | |
| 3131 | Zone* singleZone() const override { |
| 3132 | // We never inline across realms, let alone across zones, so |
| 3133 | // frames_'s script's zone is the only one of interest. |
| 3134 | return frame_.script()->zone(); |
| 3135 | } |
| 3136 | |
| 3137 | JSScript* singleScriptForZoneInvalidation() const override { |
| 3138 | MOZ_CRASH(do { do { } while (false); MOZ_ReportCrash("" "ExecutionObservableFrame shouldn't need zone-wide invalidation." , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3139); AnnotateMozCrashReason("MOZ_CRASH(" "ExecutionObservableFrame shouldn't need zone-wide invalidation." ")"); do { *((volatile int*)__null) = 3139; __attribute__((nomerge )) ::abort(); } while (false); } while (false) |
| 3139 | "ExecutionObservableFrame shouldn't need zone-wide invalidation.")do { do { } while (false); MOZ_ReportCrash("" "ExecutionObservableFrame shouldn't need zone-wide invalidation." , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3139); AnnotateMozCrashReason("MOZ_CRASH(" "ExecutionObservableFrame shouldn't need zone-wide invalidation." ")"); do { *((volatile int*)__null) = 3139; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 3140 | return nullptr; |
| 3141 | } |
| 3142 | |
| 3143 | bool shouldRecompileOrInvalidate(JSScript* script) const override { |
| 3144 | // Normally, *this represents exactly one script: the one frame_ is |
| 3145 | // running. |
| 3146 | // |
| 3147 | // However, debug-mode OSR uses *this for both invalidating Ion frames, |
| 3148 | // and recompiling the Baseline scripts that those Ion frames will bail |
| 3149 | // out into. Suppose frame_ is an inline frame, executing a copy of its |
| 3150 | // JSScript, S_inner, that has been inlined into the IonScript of some |
| 3151 | // other JSScript, S_outer. We must match S_outer, to decide which Ion |
| 3152 | // frame to invalidate; and we must match S_inner, to decide which |
| 3153 | // Baseline script to recompile. |
| 3154 | // |
| 3155 | // Note that this does not, by design, invalidate *all* inliners of |
| 3156 | // frame_.script(), as only frame_ is made observable, not |
| 3157 | // frame_.script(). |
| 3158 | if (!script->hasBaselineScript()) { |
| 3159 | return false; |
| 3160 | } |
| 3161 | |
| 3162 | if (frame_.hasScript() && script == frame_.script()) { |
| 3163 | return true; |
| 3164 | } |
| 3165 | |
| 3166 | return frame_.isRematerializedFrame() && |
| 3167 | script == frame_.asRematerializedFrame()->outerScript(); |
| 3168 | } |
| 3169 | |
| 3170 | bool shouldMarkAsDebuggee(FrameIter& iter) const override { |
| 3171 | // AbstractFramePtr can't refer to non-remateralized Ion frames or |
| 3172 | // non-debuggee wasm frames, so if iter refers to one such, we know we |
| 3173 | // don't match. |
| 3174 | // |
| 3175 | // We never use this 'has' overload for frame invalidation, only for |
| 3176 | // frame debuggee marking; so this overload doesn't need a parallel to |
| 3177 | // the just-so inlining logic above. |
| 3178 | return iter.hasUsableAbstractFramePtr() && |
| 3179 | iter.abstractFramePtr() == frame_; |
| 3180 | } |
| 3181 | }; |
| 3182 | |
| 3183 | class MOZ_RAII ExecutionObservableScript |
| 3184 | : public DebugAPI::ExecutionObservableSet { |
| 3185 | RootedScript script_; |
| 3186 | |
| 3187 | public: |
| 3188 | ExecutionObservableScript(JSContext* cx, JSScript* script) |
| 3189 | : script_(cx, script) {} |
| 3190 | |
| 3191 | Zone* singleZone() const override { return script_->zone(); } |
| 3192 | JSScript* singleScriptForZoneInvalidation() const override { return script_; } |
| 3193 | bool shouldRecompileOrInvalidate(JSScript* script) const override { |
| 3194 | return script->hasBaselineScript() && script == script_; |
| 3195 | } |
| 3196 | bool shouldMarkAsDebuggee(FrameIter& iter) const override { |
| 3197 | // AbstractFramePtr can't refer to non-remateralized Ion frames, and |
| 3198 | // while a non-rematerialized Ion frame may indeed be running script_, |
| 3199 | // we cannot mark them as debuggees until they bail out. |
| 3200 | // |
| 3201 | // Upon bailing out, any newly constructed Baseline frames that came |
| 3202 | // from Ion frames with scripts that are isDebuggee() is marked as |
| 3203 | // debuggee. This is correct in that the only other way a frame may be |
| 3204 | // marked as debuggee is via Debugger.Frame reflection, which would |
| 3205 | // have rematerialized any Ion frames. |
| 3206 | // |
| 3207 | // Also AbstractFramePtr can't refer to non-debuggee wasm frames, so if |
| 3208 | // iter refers to one such, we know we don't match. |
| 3209 | return iter.hasUsableAbstractFramePtr() && !iter.isWasm() && |
| 3210 | iter.abstractFramePtr().script() == script_; |
| 3211 | } |
| 3212 | }; |
| 3213 | |
| 3214 | /* static */ |
| 3215 | bool Debugger::updateExecutionObservabilityOfFrames( |
| 3216 | JSContext* cx, const DebugAPI::ExecutionObservableSet& obs, |
| 3217 | IsObserving observing) { |
| 3218 | AutoSuppressProfilerSampling suppressProfilerSampling(cx); |
| 3219 | |
| 3220 | if (!jit::RecompileOnStackBaselineScriptsForDebugMode(cx, obs, observing)) { |
| 3221 | return false; |
| 3222 | } |
| 3223 | |
| 3224 | AbstractFramePtr oldestEnabledFrame; |
| 3225 | for (AllFramesIter iter(cx); !iter.done(); ++iter) { |
| 3226 | if (obs.shouldMarkAsDebuggee(iter)) { |
| 3227 | if (observing) { |
| 3228 | if (!iter.abstractFramePtr().isDebuggee()) { |
| 3229 | oldestEnabledFrame = iter.abstractFramePtr(); |
| 3230 | oldestEnabledFrame.setIsDebuggee(); |
| 3231 | } |
| 3232 | if (iter.abstractFramePtr().isWasmDebugFrame()) { |
| 3233 | iter.abstractFramePtr().asWasmDebugFrame()->observe(cx); |
| 3234 | } |
| 3235 | } else { |
| 3236 | #ifdef DEBUG1 |
| 3237 | // Debugger.Frame lifetimes are managed by the debug epilogue, |
| 3238 | // so in general it's unsafe to unmark a frame if it has a |
| 3239 | // Debugger.Frame associated with it. |
| 3240 | MOZ_ASSERT(!DebugAPI::inFrameMaps(iter.abstractFramePtr()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!DebugAPI::inFrameMaps(iter.abstractFramePtr()))> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!DebugAPI::inFrameMaps(iter.abstractFramePtr())))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("!DebugAPI::inFrameMaps(iter.abstractFramePtr())" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3240); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!DebugAPI::inFrameMaps(iter.abstractFramePtr())" ")"); do { *((volatile int*)__null) = 3240; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3241 | #endif |
| 3242 | iter.abstractFramePtr().unsetIsDebuggee(); |
| 3243 | } |
| 3244 | } |
| 3245 | } |
| 3246 | |
| 3247 | // See comment in unsetPrevUpToDateUntil. |
| 3248 | if (oldestEnabledFrame) { |
| 3249 | AutoRealm ar(cx, oldestEnabledFrame.environmentChain()); |
| 3250 | DebugEnvironments::unsetPrevUpToDateUntil(cx, oldestEnabledFrame); |
| 3251 | } |
| 3252 | |
| 3253 | return true; |
| 3254 | } |
| 3255 | |
| 3256 | static inline void MarkJitScriptActiveIfObservable( |
| 3257 | JSScript* script, const DebugAPI::ExecutionObservableSet& obs) { |
| 3258 | if (obs.shouldRecompileOrInvalidate(script)) { |
| 3259 | script->jitScript()->icScript()->setActive(); |
| 3260 | } |
| 3261 | } |
| 3262 | |
| 3263 | static bool AppendAndInvalidateScript(JSContext* cx, Zone* zone, |
| 3264 | JSScript* script, |
| 3265 | jit::RecompileInfoVector& invalid, |
| 3266 | Vector<JSScript*>& scripts) { |
| 3267 | // Enter the script's realm as AddPendingInvalidation attempts to |
| 3268 | // cancel off-thread compilations, whose books are kept on the |
| 3269 | // script's realm. |
| 3270 | MOZ_ASSERT(script->zone() == zone)do { static_assert( mozilla::detail::AssertionConditionType< decltype(script->zone() == zone)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(script->zone() == zone))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("script->zone() == zone" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3270); AnnotateMozCrashReason("MOZ_ASSERT" "(" "script->zone() == zone" ")"); do { *((volatile int*)__null) = 3270; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3271 | AutoRealm ar(cx, script); |
| 3272 | AddPendingInvalidation(invalid, script); |
| 3273 | return scripts.append(script); |
| 3274 | } |
| 3275 | |
| 3276 | static bool UpdateExecutionObservabilityOfScriptsInZone( |
| 3277 | JSContext* cx, Zone* zone, const DebugAPI::ExecutionObservableSet& obs, |
| 3278 | Debugger::IsObserving observing) { |
| 3279 | using namespace js::jit; |
| 3280 | |
| 3281 | AutoSuppressProfilerSampling suppressProfilerSampling(cx); |
| 3282 | |
| 3283 | CancelOffThreadBaselineCompile(zone); |
| 3284 | |
| 3285 | JS::GCContext* gcx = cx->gcContext(); |
| 3286 | |
| 3287 | Vector<JSScript*> scripts(cx); |
| 3288 | |
| 3289 | // Iterate through observable scripts, invalidating their Ion scripts and |
| 3290 | // appending them to a vector for discarding their baseline scripts later. |
| 3291 | { |
| 3292 | RecompileInfoVector invalid; |
| 3293 | if (JSScript* script = obs.singleScriptForZoneInvalidation()) { |
| 3294 | if (obs.shouldRecompileOrInvalidate(script)) { |
| 3295 | if (!AppendAndInvalidateScript(cx, zone, script, invalid, scripts)) { |
| 3296 | return false; |
| 3297 | } |
| 3298 | } |
| 3299 | } else { |
| 3300 | for (auto base = zone->cellIter<BaseScript>(); !base.done(); |
| 3301 | base.next()) { |
| 3302 | if (!base->hasJitScript()) { |
| 3303 | continue; |
| 3304 | } |
| 3305 | JSScript* script = base->asJSScript(); |
| 3306 | if (obs.shouldRecompileOrInvalidate(script)) { |
| 3307 | if (!AppendAndInvalidateScript(cx, zone, script, invalid, scripts)) { |
| 3308 | return false; |
| 3309 | } |
| 3310 | } |
| 3311 | } |
| 3312 | } |
| 3313 | Invalidate(cx, invalid); |
| 3314 | } |
| 3315 | |
| 3316 | for (size_t i = 0; i < scripts.length(); i++) { |
| 3317 | MOZ_ASSERT(!scripts[i]->jitScript()->icScript()->active())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!scripts[i]->jitScript()->icScript()->active ())>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!scripts[i]->jitScript()->icScript()->active ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!scripts[i]->jitScript()->icScript()->active()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3317); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!scripts[i]->jitScript()->icScript()->active()" ")"); do { *((volatile int*)__null) = 3317; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3318 | } |
| 3319 | |
| 3320 | // Code below this point must be infallible to ensure the active bit of |
| 3321 | // BaselineScripts is in a consistent state. |
| 3322 | // |
| 3323 | // Mark active baseline scripts in the observable set so that they don't |
| 3324 | // get discarded. They will be recompiled. |
| 3325 | for (JitActivationIterator actIter(cx); !actIter.done(); ++actIter) { |
| 3326 | if (actIter->compartment()->zone() != zone) { |
| 3327 | continue; |
| 3328 | } |
| 3329 | |
| 3330 | for (OnlyJSJitFrameIter iter(actIter); !iter.done(); ++iter) { |
| 3331 | const JSJitFrameIter& frame = iter.frame(); |
| 3332 | switch (frame.type()) { |
| 3333 | case FrameType::BaselineJS: |
| 3334 | MarkJitScriptActiveIfObservable(frame.script(), obs); |
| 3335 | break; |
| 3336 | case FrameType::IonJS: |
| 3337 | MarkJitScriptActiveIfObservable(frame.script(), obs); |
| 3338 | for (InlineFrameIterator inlineIter(cx, &frame); inlineIter.more(); |
| 3339 | ++inlineIter) { |
| 3340 | MarkJitScriptActiveIfObservable(inlineIter.script(), obs); |
| 3341 | } |
| 3342 | break; |
| 3343 | default:; |
| 3344 | } |
| 3345 | } |
| 3346 | } |
| 3347 | |
| 3348 | // Iterate through the scripts again and finish discarding |
| 3349 | // BaselineScripts. This must be done as a separate phase as we can only |
| 3350 | // discard the BaselineScript on scripts that have no IonScript. |
| 3351 | for (size_t i = 0; i < scripts.length(); i++) { |
| 3352 | MOZ_ASSERT_IF(scripts[i]->isDebuggee(), observing)do { if (scripts[i]->isDebuggee()) { do { static_assert( mozilla ::detail::AssertionConditionType<decltype(observing)>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(observing))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("observing", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3352); AnnotateMozCrashReason("MOZ_ASSERT" "(" "observing" ")" ); do { *((volatile int*)__null) = 3352; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 3353 | if (!scripts[i]->jitScript()->icScript()->active()) { |
| 3354 | FinishDiscardBaselineScript(gcx, scripts[i]); |
| 3355 | } |
| 3356 | scripts[i]->jitScript()->icScript()->resetActive(); |
| 3357 | } |
| 3358 | |
| 3359 | // Iterate through all wasm instances to find ones that need to be updated. |
| 3360 | for (RealmsInZoneIter r(zone); !r.done(); r.next()) { |
| 3361 | for (wasm::Instance* instance : r->wasm.instances()) { |
| 3362 | if (!instance->debugEnabled()) { |
| 3363 | continue; |
| 3364 | } |
| 3365 | |
| 3366 | bool enableTrap = observing == Debugger::Observing; |
| 3367 | instance->debug().ensureEnterFrameTrapsState(cx, instance, enableTrap); |
| 3368 | } |
| 3369 | } |
| 3370 | |
| 3371 | return true; |
| 3372 | } |
| 3373 | |
| 3374 | /* static */ |
| 3375 | bool Debugger::updateExecutionObservabilityOfScripts( |
| 3376 | JSContext* cx, const DebugAPI::ExecutionObservableSet& obs, |
| 3377 | IsObserving observing) { |
| 3378 | if (Zone* zone = obs.singleZone()) { |
| 3379 | return UpdateExecutionObservabilityOfScriptsInZone(cx, zone, obs, |
| 3380 | observing); |
| 3381 | } |
| 3382 | |
| 3383 | using ZoneRange = DebugAPI::ExecutionObservableSet::ZoneRange; |
| 3384 | for (ZoneRange r = obs.zones()->all(); !r.empty(); r.popFront()) { |
| 3385 | if (!UpdateExecutionObservabilityOfScriptsInZone(cx, r.front(), obs, |
| 3386 | observing)) { |
| 3387 | return false; |
| 3388 | } |
| 3389 | } |
| 3390 | |
| 3391 | return true; |
| 3392 | } |
| 3393 | |
| 3394 | template <typename FrameFn> |
| 3395 | /* static */ |
| 3396 | void Debugger::forEachOnStackDebuggerFrame(AbstractFramePtr frame, |
| 3397 | const JS::AutoRequireNoGC& nogc, |
| 3398 | FrameFn fn) { |
| 3399 | for (Realm::DebuggerVectorEntry& entry : frame.global()->getDebuggers(nogc)) { |
| 3400 | Debugger* dbg = entry.dbg; |
| 3401 | if (FrameMap::Ptr frameEntry = dbg->frames.lookup(frame)) { |
| 3402 | fn(dbg, frameEntry->value()); |
| 3403 | } |
| 3404 | } |
| 3405 | } |
| 3406 | |
| 3407 | template <typename FrameFn> |
| 3408 | /* static */ |
| 3409 | void Debugger::forEachOnStackOrSuspendedDebuggerFrame( |
| 3410 | JSContext* cx, AbstractFramePtr frame, const JS::AutoRequireNoGC& nogc, |
| 3411 | FrameFn fn) { |
| 3412 | Rooted<AbstractGeneratorObject*> genObj( |
| 3413 | cx, frame.isGeneratorFrame() ? GetGeneratorObjectForFrame(cx, frame) |
| 3414 | : nullptr); |
| 3415 | |
| 3416 | for (Realm::DebuggerVectorEntry& entry : frame.global()->getDebuggers(nogc)) { |
| 3417 | Debugger* dbg = entry.dbg; |
| 3418 | |
| 3419 | DebuggerFrame* frameObj = nullptr; |
| 3420 | if (FrameMap::Ptr frameEntry = dbg->frames.lookup(frame)) { |
| 3421 | frameObj = frameEntry->value(); |
| 3422 | } else if (GeneratorWeakMap::Ptr frameEntry = |
| 3423 | dbg->generatorFrames.lookup(genObj)) { |
| 3424 | frameObj = frameEntry->value(); |
| 3425 | } |
| 3426 | |
| 3427 | if (frameObj) { |
| 3428 | fn(dbg, frameObj); |
| 3429 | } |
| 3430 | } |
| 3431 | } |
| 3432 | |
| 3433 | /* static */ |
| 3434 | bool Debugger::getDebuggerFrames(AbstractFramePtr frame, |
| 3435 | MutableHandle<DebuggerFrameVector> frames) { |
| 3436 | bool hadOOM = false; |
| 3437 | JS::AutoAssertNoGC nogc; |
| 3438 | forEachOnStackDebuggerFrame(frame, nogc, |
| 3439 | [&](Debugger*, DebuggerFrame* frameobj) { |
| 3440 | if (!hadOOM && !frames.append(frameobj)) { |
| 3441 | hadOOM = true; |
| 3442 | } |
| 3443 | }); |
| 3444 | return !hadOOM; |
| 3445 | } |
| 3446 | |
| 3447 | /* static */ |
| 3448 | bool Debugger::updateExecutionObservability( |
| 3449 | JSContext* cx, DebugAPI::ExecutionObservableSet& obs, |
| 3450 | IsObserving observing) { |
| 3451 | if (!obs.singleZone() && obs.zones()->empty()) { |
| 3452 | return true; |
| 3453 | } |
| 3454 | |
| 3455 | // Invalidate scripts first so we can set the needsArgsObj flag on scripts |
| 3456 | // before patching frames. |
| 3457 | return updateExecutionObservabilityOfScripts(cx, obs, observing) && |
| 3458 | updateExecutionObservabilityOfFrames(cx, obs, observing); |
| 3459 | } |
| 3460 | |
| 3461 | /* static */ |
| 3462 | bool Debugger::ensureExecutionObservabilityOfScript(JSContext* cx, |
| 3463 | JSScript* script) { |
| 3464 | if (script->isDebuggee()) { |
| 3465 | return true; |
| 3466 | } |
| 3467 | ExecutionObservableScript obs(cx, script); |
| 3468 | return updateExecutionObservability(cx, obs, Observing); |
| 3469 | } |
| 3470 | |
| 3471 | /* static */ |
| 3472 | bool DebugAPI::ensureExecutionObservabilityOfOsrFrame( |
| 3473 | JSContext* cx, AbstractFramePtr osrSourceFrame) { |
| 3474 | MOZ_ASSERT(osrSourceFrame.isDebuggee())do { static_assert( mozilla::detail::AssertionConditionType< decltype(osrSourceFrame.isDebuggee())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(osrSourceFrame.isDebuggee()) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("osrSourceFrame.isDebuggee()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3474); AnnotateMozCrashReason("MOZ_ASSERT" "(" "osrSourceFrame.isDebuggee()" ")"); do { *((volatile int*)__null) = 3474; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3475 | if (osrSourceFrame.script()->hasBaselineScript() && |
| 3476 | osrSourceFrame.script()->baselineScript()->hasDebugInstrumentation()) { |
| 3477 | return true; |
| 3478 | } |
| 3479 | ExecutionObservableFrame obs(osrSourceFrame); |
| 3480 | return Debugger::updateExecutionObservabilityOfFrames(cx, obs, Observing); |
| 3481 | } |
| 3482 | |
| 3483 | /* static */ |
| 3484 | bool Debugger::ensureExecutionObservabilityOfFrame(JSContext* cx, |
| 3485 | AbstractFramePtr frame) { |
| 3486 | MOZ_ASSERT_IF(frame.hasScript() && frame.script()->isDebuggee(),do { if (frame.hasScript() && frame.script()->isDebuggee ()) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(frame.isDebuggee())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(frame.isDebuggee()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("frame.isDebuggee()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3487); AnnotateMozCrashReason("MOZ_ASSERT" "(" "frame.isDebuggee()" ")"); do { *((volatile int*)__null) = 3487; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false) |
| 3487 | frame.isDebuggee())do { if (frame.hasScript() && frame.script()->isDebuggee ()) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(frame.isDebuggee())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(frame.isDebuggee()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("frame.isDebuggee()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3487); AnnotateMozCrashReason("MOZ_ASSERT" "(" "frame.isDebuggee()" ")"); do { *((volatile int*)__null) = 3487; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 3488 | MOZ_ASSERT_IF(frame.isWasmDebugFrame(), frame.wasmInstance()->debugEnabled())do { if (frame.isWasmDebugFrame()) { do { static_assert( mozilla ::detail::AssertionConditionType<decltype(frame.wasmInstance ()->debugEnabled())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(frame.wasmInstance()->debugEnabled ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("frame.wasmInstance()->debugEnabled()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3488); AnnotateMozCrashReason("MOZ_ASSERT" "(" "frame.wasmInstance()->debugEnabled()" ")"); do { *((volatile int*)__null) = 3488; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 3489 | if (frame.isDebuggee()) { |
| 3490 | return true; |
| 3491 | } |
| 3492 | ExecutionObservableFrame obs(frame); |
| 3493 | return updateExecutionObservabilityOfFrames(cx, obs, Observing); |
| 3494 | } |
| 3495 | |
| 3496 | /* static */ |
| 3497 | bool Debugger::ensureExecutionObservabilityOfRealm(JSContext* cx, |
| 3498 | Realm* realm) { |
| 3499 | if (realm->debuggerObservesAllExecution()) { |
| 3500 | return true; |
| 3501 | } |
| 3502 | ExecutionObservableRealms obs(cx); |
| 3503 | if (!obs.add(realm)) { |
| 3504 | return false; |
| 3505 | } |
| 3506 | realm->updateDebuggerObservesAllExecution(); |
| 3507 | return updateExecutionObservability(cx, obs, Observing); |
| 3508 | } |
| 3509 | |
| 3510 | /* static */ |
| 3511 | bool Debugger::hookObservesAllExecution(Hook which) { |
| 3512 | return which == OnEnterFrame; |
| 3513 | } |
| 3514 | |
| 3515 | Debugger::IsObserving Debugger::observesAllExecution() const { |
| 3516 | if (!!getHook(OnEnterFrame)) { |
| 3517 | return Observing; |
| 3518 | } |
| 3519 | return NotObserving; |
| 3520 | } |
| 3521 | |
| 3522 | Debugger::IsObserving Debugger::observesAsmJS() const { |
| 3523 | if (!allowUnobservedAsmJS) { |
| 3524 | return Observing; |
| 3525 | } |
| 3526 | return NotObserving; |
| 3527 | } |
| 3528 | |
| 3529 | Debugger::IsObserving Debugger::observesWasm() const { |
| 3530 | if (!allowUnobservedWasm) { |
| 3531 | return Observing; |
| 3532 | } |
| 3533 | return NotObserving; |
| 3534 | } |
| 3535 | |
| 3536 | Debugger::IsObserving Debugger::observesCoverage() const { |
| 3537 | if (collectCoverageInfo) { |
| 3538 | return Observing; |
| 3539 | } |
| 3540 | return NotObserving; |
| 3541 | } |
| 3542 | |
| 3543 | Debugger::IsObserving Debugger::observesNativeCalls() const { |
| 3544 | if (getHook(Debugger::OnNativeCall)) { |
| 3545 | return Observing; |
| 3546 | } |
| 3547 | return NotObserving; |
| 3548 | } |
| 3549 | |
| 3550 | bool Debugger::isExclusiveDebuggerOnEval() const { |
| 3551 | return exclusiveDebuggerOnEval; |
| 3552 | } |
| 3553 | |
| 3554 | // Toggle whether this Debugger's debuggees observe all execution. This is |
| 3555 | // called when a hook that observes all execution is set or unset. See |
| 3556 | // hookObservesAllExecution. |
| 3557 | bool Debugger::updateObservesAllExecutionOnDebuggees(JSContext* cx, |
| 3558 | IsObserving observing) { |
| 3559 | ExecutionObservableRealms obs(cx); |
| 3560 | |
| 3561 | for (WeakGlobalObjectSet::Range r = debuggees.all(); !r.empty(); |
| 3562 | r.popFront()) { |
| 3563 | GlobalObject* global = r.front(); |
| 3564 | JS::Realm* realm = global->realm(); |
| 3565 | |
| 3566 | if (realm->debuggerObservesAllExecution() == observing) { |
| 3567 | continue; |
| 3568 | } |
| 3569 | |
| 3570 | // It's expensive to eagerly invalidate and recompile a realm, |
| 3571 | // so add the realm to the set only if we are observing. |
| 3572 | if (observing && !obs.add(realm)) { |
| 3573 | return false; |
| 3574 | } |
| 3575 | } |
| 3576 | |
| 3577 | if (!updateExecutionObservability(cx, obs, observing)) { |
| 3578 | return false; |
| 3579 | } |
| 3580 | |
| 3581 | using RealmRange = ExecutionObservableRealms::RealmRange; |
| 3582 | for (RealmRange r = obs.realms()->all(); !r.empty(); r.popFront()) { |
| 3583 | r.front()->updateDebuggerObservesAllExecution(); |
| 3584 | } |
| 3585 | |
| 3586 | return true; |
| 3587 | } |
| 3588 | |
| 3589 | bool Debugger::updateObservesCoverageOnDebuggees(JSContext* cx, |
| 3590 | IsObserving observing) { |
| 3591 | ExecutionObservableRealms obs(cx); |
| 3592 | |
| 3593 | for (WeakGlobalObjectSet::Range r = debuggees.all(); !r.empty(); |
| 3594 | r.popFront()) { |
| 3595 | GlobalObject* global = r.front(); |
| 3596 | Realm* realm = global->realm(); |
| 3597 | |
| 3598 | if (realm->debuggerObservesCoverage() == observing) { |
| 3599 | continue; |
| 3600 | } |
| 3601 | |
| 3602 | // Invalidate and recompile a realm to add or remove PCCounts |
| 3603 | // increments. We have to eagerly invalidate, as otherwise we might have |
| 3604 | // dangling pointers to freed PCCounts. |
| 3605 | if (!obs.add(realm)) { |
| 3606 | return false; |
| 3607 | } |
| 3608 | } |
| 3609 | |
| 3610 | // If any frame on the stack belongs to the debuggee, then we cannot update |
| 3611 | // the ScriptCounts, because this would imply to invalidate a Debugger.Frame |
| 3612 | // to recompile it with/without ScriptCount support. |
| 3613 | for (FrameIter iter(cx); !iter.done(); ++iter) { |
| 3614 | if (obs.shouldMarkAsDebuggee(iter)) { |
| 3615 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 3616 | JSMSG_DEBUG_NOT_IDLE); |
| 3617 | return false; |
| 3618 | } |
| 3619 | } |
| 3620 | |
| 3621 | if (!updateExecutionObservability(cx, obs, observing)) { |
| 3622 | return false; |
| 3623 | } |
| 3624 | |
| 3625 | // All realms can safely be toggled, and all scripts will be recompiled. |
| 3626 | // Thus we can update each realm accordingly. |
| 3627 | using RealmRange = ExecutionObservableRealms::RealmRange; |
| 3628 | for (RealmRange r = obs.realms()->all(); !r.empty(); r.popFront()) { |
| 3629 | r.front()->updateDebuggerObservesCoverage(); |
| 3630 | } |
| 3631 | |
| 3632 | return true; |
| 3633 | } |
| 3634 | |
| 3635 | void Debugger::updateObservesAsmJSOnDebuggees(IsObserving observing) { |
| 3636 | for (WeakGlobalObjectSet::Range r = debuggees.all(); !r.empty(); |
| 3637 | r.popFront()) { |
| 3638 | GlobalObject* global = r.front(); |
| 3639 | Realm* realm = global->realm(); |
| 3640 | |
| 3641 | if (realm->debuggerObservesAsmJS() == observing) { |
| 3642 | continue; |
| 3643 | } |
| 3644 | |
| 3645 | realm->updateDebuggerObservesAsmJS(); |
| 3646 | } |
| 3647 | } |
| 3648 | |
| 3649 | void Debugger::updateObservesWasmOnDebuggees(IsObserving observing) { |
| 3650 | for (WeakGlobalObjectSet::Range r = debuggees.all(); !r.empty(); |
| 3651 | r.popFront()) { |
| 3652 | GlobalObject* global = r.front(); |
| 3653 | Realm* realm = global->realm(); |
| 3654 | |
| 3655 | if (realm->debuggerObservesWasm() == observing) { |
| 3656 | continue; |
| 3657 | } |
| 3658 | |
| 3659 | realm->updateDebuggerObservesWasm(); |
| 3660 | } |
| 3661 | } |
| 3662 | |
| 3663 | void Debugger::updateObservesNativeCallOnDebuggees(IsObserving observing) { |
| 3664 | for (WeakGlobalObjectSet::Range r = debuggees.all(); !r.empty(); |
| 3665 | r.popFront()) { |
| 3666 | GlobalObject* global = r.front(); |
| 3667 | Realm* realm = global->realm(); |
| 3668 | |
| 3669 | if (realm->debuggerObservesNativeCall() == observing) { |
| 3670 | continue; |
| 3671 | } |
| 3672 | |
| 3673 | realm->updateDebuggerObservesNativeCall(); |
| 3674 | } |
| 3675 | } |
| 3676 | |
| 3677 | /*** Allocations Tracking ***************************************************/ |
| 3678 | |
| 3679 | /* static */ |
| 3680 | bool Debugger::cannotTrackAllocations(const GlobalObject& global) { |
| 3681 | auto existingCallback = global.realm()->getAllocationMetadataBuilder(); |
| 3682 | return existingCallback && existingCallback != &SavedStacks::metadataBuilder; |
| 3683 | } |
| 3684 | |
| 3685 | /* static */ |
| 3686 | bool DebugAPI::isObservedByDebuggerTrackingAllocations( |
| 3687 | const GlobalObject& debuggee) { |
| 3688 | JS::AutoAssertNoGC nogc; |
| 3689 | for (Realm::DebuggerVectorEntry& entry : debuggee.getDebuggers(nogc)) { |
| 3690 | // Use unbarrieredGet() to prevent triggering read barrier while |
| 3691 | // collecting, this is safe as long as dbg does not escape. |
| 3692 | Debugger* dbg = entry.dbg.unbarrieredGet(); |
| 3693 | if (dbg->trackingAllocationSites) { |
| 3694 | return true; |
| 3695 | } |
| 3696 | } |
| 3697 | |
| 3698 | return false; |
| 3699 | } |
| 3700 | |
| 3701 | /* static */ |
| 3702 | bool Debugger::addAllocationsTracking(JSContext* cx, |
| 3703 | Handle<GlobalObject*> debuggee) { |
| 3704 | // Precondition: the given global object is being observed by at least one |
| 3705 | // Debugger that is tracking allocations. |
| 3706 | MOZ_ASSERT(DebugAPI::isObservedByDebuggerTrackingAllocations(*debuggee))do { static_assert( mozilla::detail::AssertionConditionType< decltype(DebugAPI::isObservedByDebuggerTrackingAllocations(*debuggee ))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(DebugAPI::isObservedByDebuggerTrackingAllocations(*debuggee )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("DebugAPI::isObservedByDebuggerTrackingAllocations(*debuggee)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3706); AnnotateMozCrashReason("MOZ_ASSERT" "(" "DebugAPI::isObservedByDebuggerTrackingAllocations(*debuggee)" ")"); do { *((volatile int*)__null) = 3706; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3707 | |
| 3708 | if (Debugger::cannotTrackAllocations(*debuggee)) { |
| 3709 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 3710 | JSMSG_OBJECT_METADATA_CALLBACK_ALREADY_SET); |
| 3711 | return false; |
| 3712 | } |
| 3713 | |
| 3714 | debuggee->realm()->setAllocationMetadataBuilder( |
| 3715 | &SavedStacks::metadataBuilder); |
| 3716 | debuggee->realm()->chooseAllocationSamplingProbability(); |
| 3717 | return true; |
| 3718 | } |
| 3719 | |
| 3720 | /* static */ |
| 3721 | void Debugger::removeAllocationsTracking(GlobalObject& global) { |
| 3722 | // If there are still Debuggers that are observing allocations, we cannot |
| 3723 | // remove the metadata callback yet. Recompute the sampling probability |
| 3724 | // based on the remaining debuggers' needs. |
| 3725 | if (DebugAPI::isObservedByDebuggerTrackingAllocations(global)) { |
| 3726 | global.realm()->chooseAllocationSamplingProbability(); |
| 3727 | return; |
| 3728 | } |
| 3729 | |
| 3730 | if (!global.realm()->runtimeFromMainThread()->recordAllocationCallback) { |
| 3731 | // Something like the Gecko Profiler could request from the the JS runtime |
| 3732 | // to record allocations. If it is recording allocations, then do not |
| 3733 | // destroy the allocation metadata builder at this time. |
| 3734 | global.realm()->forgetAllocationMetadataBuilder(); |
| 3735 | } |
| 3736 | } |
| 3737 | |
| 3738 | bool Debugger::addAllocationsTrackingForAllDebuggees(JSContext* cx) { |
| 3739 | MOZ_ASSERT(trackingAllocationSites)do { static_assert( mozilla::detail::AssertionConditionType< decltype(trackingAllocationSites)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(trackingAllocationSites))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("trackingAllocationSites" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3739); AnnotateMozCrashReason("MOZ_ASSERT" "(" "trackingAllocationSites" ")"); do { *((volatile int*)__null) = 3739; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3740 | |
| 3741 | // We don't want to end up in a state where we added allocations |
| 3742 | // tracking to some of our debuggees, but failed to do so for |
| 3743 | // others. Before attempting to start tracking allocations in *any* of |
| 3744 | // our debuggees, ensure that we will be able to track allocations for |
| 3745 | // *all* of our debuggees. |
| 3746 | for (WeakGlobalObjectSet::Range r = debuggees.all(); !r.empty(); |
| 3747 | r.popFront()) { |
| 3748 | if (Debugger::cannotTrackAllocations(*r.front().get())) { |
| 3749 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 3750 | JSMSG_OBJECT_METADATA_CALLBACK_ALREADY_SET); |
| 3751 | return false; |
| 3752 | } |
| 3753 | } |
| 3754 | |
| 3755 | Rooted<GlobalObject*> g(cx); |
| 3756 | for (WeakGlobalObjectSet::Range r = debuggees.all(); !r.empty(); |
| 3757 | r.popFront()) { |
| 3758 | // This should always succeed, since we already checked for the |
| 3759 | // error case above. |
| 3760 | g = r.front().get(); |
| 3761 | MOZ_ALWAYS_TRUE(Debugger::addAllocationsTracking(cx, g))do { if ((__builtin_expect(!!(Debugger::addAllocationsTracking (cx, g)), 1))) { } else { do { do { } while (false); MOZ_ReportCrash ("" "Debugger::addAllocationsTracking(cx, g)", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3761); AnnotateMozCrashReason("MOZ_CRASH(" "Debugger::addAllocationsTracking(cx, g)" ")"); do { *((volatile int*)__null) = 3761; __attribute__((nomerge )) ::abort(); } while (false); } while (false); } } while (false ); |
| 3762 | } |
| 3763 | |
| 3764 | return true; |
| 3765 | } |
| 3766 | |
| 3767 | void Debugger::removeAllocationsTrackingForAllDebuggees() { |
| 3768 | for (WeakGlobalObjectSet::Range r = debuggees.all(); !r.empty(); |
| 3769 | r.popFront()) { |
| 3770 | Debugger::removeAllocationsTracking(*r.front().get()); |
| 3771 | } |
| 3772 | |
| 3773 | allocationsLog.clear(); |
| 3774 | } |
| 3775 | |
| 3776 | /*** Debugger JSObjects *****************************************************/ |
| 3777 | |
| 3778 | template <typename F> |
| 3779 | inline void Debugger::forEachWeakMap(const F& f) { |
| 3780 | f(generatorFrames); |
| 3781 | f(objects); |
| 3782 | f(environments); |
| 3783 | f(scripts); |
| 3784 | f(sources); |
| 3785 | f(wasmInstanceScripts); |
| 3786 | f(wasmInstanceSources); |
| 3787 | } |
| 3788 | |
| 3789 | void Debugger::traceCrossCompartmentEdges(JSTracer* trc) { |
| 3790 | forEachWeakMap( |
| 3791 | [trc](auto& weakMap) { weakMap.traceCrossCompartmentEdges(trc); }); |
| 3792 | } |
| 3793 | |
| 3794 | /* |
| 3795 | * Ordinarily, WeakMap keys and values are marked because at some point it was |
| 3796 | * discovered that the WeakMap was live; that is, some object containing the |
| 3797 | * WeakMap was marked during mark phase. |
| 3798 | * |
| 3799 | * However, during zone GC, we have to do something about cross-compartment |
| 3800 | * edges in non-GC'd compartments. Since the source may be live, we |
| 3801 | * conservatively assume it is and mark the edge. |
| 3802 | * |
| 3803 | * Each Debugger object keeps five cross-compartment WeakMaps: objects, scripts, |
| 3804 | * lazy scripts, script source objects, and environments. They have the property |
| 3805 | * that all their values are in the same compartment as the Debugger object, |
| 3806 | * but we have to mark the keys and the private pointer in the wrapper object. |
| 3807 | * |
| 3808 | * We must scan all Debugger objects regardless of whether they *currently* have |
| 3809 | * any debuggees in a compartment being GC'd, because the WeakMap entries |
| 3810 | * persist even when debuggees are removed. |
| 3811 | * |
| 3812 | * This happens during the initial mark phase, not iterative marking, because |
| 3813 | * all the edges being reported here are strong references. |
| 3814 | * |
| 3815 | * This method is also used during compacting GC to update cross compartment |
| 3816 | * pointers into zones that are being compacted. |
| 3817 | */ |
| 3818 | /* static */ |
| 3819 | void DebugAPI::traceCrossCompartmentEdges(JSTracer* trc) { |
| 3820 | MOZ_ASSERT(JS::RuntimeHeapIsMajorCollecting())do { static_assert( mozilla::detail::AssertionConditionType< decltype(JS::RuntimeHeapIsMajorCollecting())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(JS::RuntimeHeapIsMajorCollecting ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("JS::RuntimeHeapIsMajorCollecting()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3820); AnnotateMozCrashReason("MOZ_ASSERT" "(" "JS::RuntimeHeapIsMajorCollecting()" ")"); do { *((volatile int*)__null) = 3820; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3821 | |
| 3822 | JSRuntime* rt = trc->runtime(); |
| 3823 | gc::State state = rt->gc.state(); |
| 3824 | |
| 3825 | for (Debugger* dbg : rt->debuggerList()) { |
| 3826 | Zone* zone = MaybeForwarded(dbg->object.get())->zone(); |
| 3827 | if (!zone->isCollecting() || state == gc::State::Compact) { |
| 3828 | dbg->traceCrossCompartmentEdges(trc); |
| 3829 | } |
| 3830 | } |
| 3831 | } |
| 3832 | |
| 3833 | #ifdef DEBUG1 |
| 3834 | |
| 3835 | static bool RuntimeHasDebugger(JSRuntime* rt, Debugger* dbg) { |
| 3836 | for (Debugger* d : rt->debuggerList()) { |
| 3837 | if (d == dbg) { |
| 3838 | return true; |
| 3839 | } |
| 3840 | } |
| 3841 | return false; |
| 3842 | } |
| 3843 | |
| 3844 | /* static */ |
| 3845 | bool DebugAPI::edgeIsInDebuggerWeakmap(JSRuntime* rt, JSObject* src, |
| 3846 | JS::GCCellPtr dst) { |
| 3847 | if (!Debugger::isChildJSObject(src)) { |
| 3848 | return false; |
| 3849 | } |
| 3850 | |
| 3851 | if (src->is<DebuggerFrame>()) { |
| 3852 | DebuggerFrame* frame = &src->as<DebuggerFrame>(); |
| 3853 | Debugger* dbg = frame->owner(); |
| 3854 | MOZ_ASSERT(RuntimeHasDebugger(rt, dbg))do { static_assert( mozilla::detail::AssertionConditionType< decltype(RuntimeHasDebugger(rt, dbg))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(RuntimeHasDebugger(rt, dbg)) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("RuntimeHasDebugger(rt, dbg)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3854); AnnotateMozCrashReason("MOZ_ASSERT" "(" "RuntimeHasDebugger(rt, dbg)" ")"); do { *((volatile int*)__null) = 3854; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3855 | |
| 3856 | if (dst.is<BaseScript>()) { |
| 3857 | // The generatorFrames map is not keyed on the associated JSScript. Get |
| 3858 | // the key from the source object and check everything matches. |
| 3859 | AbstractGeneratorObject* genObj = &frame->unwrappedGenerator(); |
| 3860 | return frame->generatorScript() == &dst.as<BaseScript>() && |
| 3861 | dbg->generatorFrames.hasEntry(genObj, src); |
| 3862 | } |
| 3863 | return dst.is<JSObject>() && |
| 3864 | dst.as<JSObject>().is<AbstractGeneratorObject>() && |
| 3865 | dbg->generatorFrames.hasEntry( |
| 3866 | &dst.as<JSObject>().as<AbstractGeneratorObject>(), src); |
| 3867 | } |
| 3868 | if (src->is<DebuggerObject>()) { |
| 3869 | Debugger* dbg = src->as<DebuggerObject>().owner(); |
| 3870 | MOZ_ASSERT(RuntimeHasDebugger(rt, dbg))do { static_assert( mozilla::detail::AssertionConditionType< decltype(RuntimeHasDebugger(rt, dbg))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(RuntimeHasDebugger(rt, dbg)) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("RuntimeHasDebugger(rt, dbg)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3870); AnnotateMozCrashReason("MOZ_ASSERT" "(" "RuntimeHasDebugger(rt, dbg)" ")"); do { *((volatile int*)__null) = 3870; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3871 | return dst.is<JSObject>() && |
| 3872 | dbg->objects.hasEntry(&dst.as<JSObject>(), src); |
| 3873 | } |
| 3874 | if (src->is<DebuggerEnvironment>()) { |
| 3875 | Debugger* dbg = src->as<DebuggerEnvironment>().owner(); |
| 3876 | MOZ_ASSERT(RuntimeHasDebugger(rt, dbg))do { static_assert( mozilla::detail::AssertionConditionType< decltype(RuntimeHasDebugger(rt, dbg))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(RuntimeHasDebugger(rt, dbg)) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("RuntimeHasDebugger(rt, dbg)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3876); AnnotateMozCrashReason("MOZ_ASSERT" "(" "RuntimeHasDebugger(rt, dbg)" ")"); do { *((volatile int*)__null) = 3876; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3877 | return dst.is<JSObject>() && |
| 3878 | dbg->environments.hasEntry(&dst.as<JSObject>(), src); |
| 3879 | } |
| 3880 | if (src->is<DebuggerScript>()) { |
| 3881 | Debugger* dbg = src->as<DebuggerScript>().owner(); |
| 3882 | MOZ_ASSERT(RuntimeHasDebugger(rt, dbg))do { static_assert( mozilla::detail::AssertionConditionType< decltype(RuntimeHasDebugger(rt, dbg))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(RuntimeHasDebugger(rt, dbg)) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("RuntimeHasDebugger(rt, dbg)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3882); AnnotateMozCrashReason("MOZ_ASSERT" "(" "RuntimeHasDebugger(rt, dbg)" ")"); do { *((volatile int*)__null) = 3882; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3883 | |
| 3884 | return src->as<DebuggerScript>().getReferent().match( |
| 3885 | [=](BaseScript* script) { |
| 3886 | return dst.is<BaseScript>() && script == &dst.as<BaseScript>() && |
| 3887 | dbg->scripts.hasEntry(script, src); |
| 3888 | }, |
| 3889 | [=](WasmInstanceObject* instance) { |
| 3890 | return dst.is<JSObject>() && instance == &dst.as<JSObject>() && |
| 3891 | dbg->wasmInstanceScripts.hasEntry(instance, src); |
| 3892 | }); |
| 3893 | } |
| 3894 | if (src->is<DebuggerSource>()) { |
| 3895 | Debugger* dbg = src->as<DebuggerSource>().owner(); |
| 3896 | MOZ_ASSERT(RuntimeHasDebugger(rt, dbg))do { static_assert( mozilla::detail::AssertionConditionType< decltype(RuntimeHasDebugger(rt, dbg))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(RuntimeHasDebugger(rt, dbg)) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("RuntimeHasDebugger(rt, dbg)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3896); AnnotateMozCrashReason("MOZ_ASSERT" "(" "RuntimeHasDebugger(rt, dbg)" ")"); do { *((volatile int*)__null) = 3896; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3897 | |
| 3898 | return src->as<DebuggerSource>().getReferent().match( |
| 3899 | [=](ScriptSourceObject* sso) { |
| 3900 | return dst.is<JSObject>() && sso == &dst.as<JSObject>() && |
| 3901 | dbg->sources.hasEntry(sso, src); |
| 3902 | }, |
| 3903 | [=](WasmInstanceObject* instance) { |
| 3904 | return dst.is<JSObject>() && instance == &dst.as<JSObject>() && |
| 3905 | dbg->wasmInstanceSources.hasEntry(instance, src); |
| 3906 | }); |
| 3907 | } |
| 3908 | MOZ_ASSERT_UNREACHABLE("Unhandled cross-compartment edge")do { static_assert( mozilla::detail::AssertionConditionType< decltype(false)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("false" " (" "MOZ_ASSERT_UNREACHABLE: " "Unhandled cross-compartment edge" ")", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3908); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") (" "MOZ_ASSERT_UNREACHABLE: " "Unhandled cross-compartment edge" ")"); do { *((volatile int*)__null) = 3908; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3909 | } |
| 3910 | |
| 3911 | #endif |
| 3912 | |
| 3913 | /* See comments in DebugAPI.h. */ |
| 3914 | void DebugAPI::traceFramesWithLiveHooks(JSTracer* tracer) { |
| 3915 | JSRuntime* rt = tracer->runtime(); |
| 3916 | |
| 3917 | // Note that we must loop over all Debuggers here, not just those known to be |
| 3918 | // reachable from JavaScript. The existence of hooks set on a Debugger.Frame |
| 3919 | // for a live stack frame makes the Debuger.Frame (and hence its Debugger) |
| 3920 | // reachable. |
| 3921 | for (Debugger* dbg : rt->debuggerList()) { |
| 3922 | // Callback tracers set their own traversal boundaries, but otherwise we're |
| 3923 | // only interested in Debugger.Frames participating in the collection. |
| 3924 | if (!dbg->zone()->isGCMarking() && !tracer->isCallbackTracer()) { |
| 3925 | continue; |
| 3926 | } |
| 3927 | |
| 3928 | for (Debugger::FrameMap::Range r = dbg->frames.all(); !r.empty(); |
| 3929 | r.popFront()) { |
| 3930 | HeapPtr<DebuggerFrame*>& frameobj = r.front().value(); |
| 3931 | MOZ_ASSERT(frameobj->isOnStackOrSuspendedWasmStack())do { static_assert( mozilla::detail::AssertionConditionType< decltype(frameobj->isOnStackOrSuspendedWasmStack())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(frameobj->isOnStackOrSuspendedWasmStack()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("frameobj->isOnStackOrSuspendedWasmStack()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3931); AnnotateMozCrashReason("MOZ_ASSERT" "(" "frameobj->isOnStackOrSuspendedWasmStack()" ")"); do { *((volatile int*)__null) = 3931; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3932 | if (frameobj->hasAnyHooks()) { |
| 3933 | TraceEdge(tracer, &frameobj, "Debugger.Frame with live hooks"); |
| 3934 | } |
| 3935 | } |
| 3936 | } |
| 3937 | } |
| 3938 | |
| 3939 | void DebugAPI::slowPathTraceGeneratorFrame(JSTracer* tracer, |
| 3940 | AbstractGeneratorObject* generator) { |
| 3941 | MOZ_ASSERT(generator->realm()->isDebuggee())do { static_assert( mozilla::detail::AssertionConditionType< decltype(generator->realm()->isDebuggee())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(generator->realm()->isDebuggee()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("generator->realm()->isDebuggee()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 3941); AnnotateMozCrashReason("MOZ_ASSERT" "(" "generator->realm()->isDebuggee()" ")"); do { *((volatile int*)__null) = 3941; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 3942 | |
| 3943 | // Ignore generic tracers. |
| 3944 | // |
| 3945 | // There are two kinds of generic tracers we need to bar: MovingTracers used |
| 3946 | // by compacting GC; and CompartmentCheckTracers. |
| 3947 | // |
| 3948 | // MovingTracers are used by the compacting GC to update pointers to objects |
| 3949 | // that have been moved: the MovingTracer checks each outgoing pointer to see |
| 3950 | // if it refers to a forwarding pointer, and if so, updates the pointer stored |
| 3951 | // in the object. |
| 3952 | // |
| 3953 | // Generator objects are background finalized, so the compacting GC assumes it |
| 3954 | // can update their pointers in the background as well. Since we treat |
| 3955 | // generator objects as having an owning edge to their Debugger.Frame objects, |
| 3956 | // a helper thread trying to update a generator object will end up calling |
| 3957 | // this function. However, it is verboten to do weak map lookups (e.g., in |
| 3958 | // Debugger::generatorFrames) off the main thread, since StableCellHasher |
| 3959 | // must consult the Zone to find the key's unique id. |
| 3960 | // |
| 3961 | // Fortunately, it's not necessary for compacting GC to worry about that edge |
| 3962 | // in the first place: the edge isn't a literal pointer stored on the |
| 3963 | // generator object, it's only inferred from the realm's debuggee status and |
| 3964 | // its Debuggers' generatorFrames weak maps. Those get relocated when the |
| 3965 | // Debugger itself is visited, so compacting GC can just ignore this edge. |
| 3966 | // |
| 3967 | // CompartmentCheckTracers walk the graph and verify that all |
| 3968 | // cross-compartment edges are recorded in the cross-compartment wrapper |
| 3969 | // tables. But edges between Debugger.Foo objects and their referents are not |
| 3970 | // in the CCW tables, so a CrossCompartmentCheckTracers also calls |
| 3971 | // DebugAPI::edgeIsInDebuggerWeakmap to see if a given cross-compartment edge |
| 3972 | // is accounted for there. However, edgeIsInDebuggerWeakmap only handles |
| 3973 | // debugger -> debuggee edges, so it won't recognize the edge we're |
| 3974 | // potentially traversing here, from a generator object to its Debugger.Frame. |
| 3975 | // |
| 3976 | // But since the purpose of this function is to retrieve such edges, if they |
| 3977 | // exist, from the very tables that edgeIsInDebuggerWeakmap would consult, |
| 3978 | // we're at no risk of reporting edges that they do not cover. So we can |
| 3979 | // safely hide the edges from CompartmentCheckTracers. |
| 3980 | // |
| 3981 | // We can't quite recognize MovingTracers and CompartmentCheckTracers |
| 3982 | // precisely, but they're both generic tracers, so we just show them all the |
| 3983 | // door. This means the generator -> Debugger.Frame edge is going to be |
| 3984 | // invisible to some traversals. We'll cope with that when it's a problem. |
| 3985 | if (!tracer->isMarkingTracer()) { |
| 3986 | return; |
| 3987 | } |
| 3988 | |
| 3989 | mozilla::Maybe<AutoLockGC> lock; |
| 3990 | GCMarker* marker = GCMarker::fromTracer(tracer); |
| 3991 | if (marker->isParallelMarking()) { |
| 3992 | // Synchronise access to generatorFrames. |
| 3993 | lock.emplace(marker->runtime()); |
| 3994 | } |
| 3995 | |
| 3996 | JS::AutoAssertNoGC nogc; |
| 3997 | for (Realm::DebuggerVectorEntry& entry : |
| 3998 | generator->realm()->getDebuggers(nogc)) { |
| 3999 | Debugger* dbg = entry.dbg.unbarrieredGet(); |
| 4000 | |
| 4001 | if (Debugger::GeneratorWeakMap::Ptr entry = |
| 4002 | dbg->generatorFrames.lookupUnbarriered(generator)) { |
| 4003 | HeapPtr<DebuggerFrame*>& frameObj = entry->value(); |
| 4004 | if (frameObj->hasAnyHooks()) { |
| 4005 | // See comment above. |
| 4006 | TraceCrossCompartmentEdge(tracer, generator, &frameObj, |
| 4007 | "Debugger.Frame with hooks for generator"); |
| 4008 | } |
| 4009 | } |
| 4010 | } |
| 4011 | } |
| 4012 | |
| 4013 | /* static */ |
| 4014 | void DebugAPI::traceAllForMovingGC(JSTracer* trc) { |
| 4015 | JSRuntime* rt = trc->runtime(); |
| 4016 | for (Debugger* dbg : rt->debuggerList()) { |
| 4017 | dbg->traceForMovingGC(trc); |
| 4018 | } |
| 4019 | } |
| 4020 | |
| 4021 | /* |
| 4022 | * Trace all debugger-owned GC things unconditionally. This is used during |
| 4023 | * compacting GC and in minor GC: the minor GC cannot apply the weak constraints |
| 4024 | * of the full GC because it visits only part of the heap. |
| 4025 | */ |
| 4026 | void Debugger::traceForMovingGC(JSTracer* trc) { |
| 4027 | trace(trc); |
| 4028 | |
| 4029 | for (WeakGlobalObjectSet::Enum e(debuggees); !e.empty(); e.popFront()) { |
| 4030 | TraceEdge(trc, &e.mutableFront(), "Global Object"); |
| 4031 | } |
| 4032 | } |
| 4033 | |
| 4034 | /* static */ |
| 4035 | void Debugger::traceObject(JSTracer* trc, JSObject* obj) { |
| 4036 | if (Debugger* dbg = Debugger::fromJSObject(obj)) { |
| 4037 | dbg->trace(trc); |
| 4038 | } |
| 4039 | } |
| 4040 | |
| 4041 | void Debugger::trace(JSTracer* trc) { |
| 4042 | TraceEdge(trc, &object, "Debugger Object"); |
| 4043 | |
| 4044 | TraceNullableEdge(trc, &uncaughtExceptionHook, "hooks"); |
| 4045 | |
| 4046 | // Mark Debugger.Frame objects. Since the Debugger is reachable, JS could call |
| 4047 | // getNewestFrame and then walk the stack, so these are all reachable from JS. |
| 4048 | // |
| 4049 | // Note that if a Debugger.Frame has hooks set, it must be retained even if |
| 4050 | // its Debugger is unreachable, since JS could observe that its hooks did not |
| 4051 | // fire. That case is handled by DebugAPI::traceFrames. |
| 4052 | // |
| 4053 | // (We have weakly-referenced Debugger.Frame objects as well, for suspended |
| 4054 | // generator frames; these are traced via generatorFrames just below.) |
| 4055 | for (FrameMap::Range r = frames.all(); !r.empty(); r.popFront()) { |
| 4056 | HeapPtr<DebuggerFrame*>& frameobj = r.front().value(); |
| 4057 | TraceEdge(trc, &frameobj, "live Debugger.Frame"); |
| 4058 | MOZ_ASSERT(frameobj->isOnStackOrSuspendedWasmStack())do { static_assert( mozilla::detail::AssertionConditionType< decltype(frameobj->isOnStackOrSuspendedWasmStack())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(frameobj->isOnStackOrSuspendedWasmStack()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("frameobj->isOnStackOrSuspendedWasmStack()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 4058); AnnotateMozCrashReason("MOZ_ASSERT" "(" "frameobj->isOnStackOrSuspendedWasmStack()" ")"); do { *((volatile int*)__null) = 4058; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4059 | } |
| 4060 | |
| 4061 | allocationsLog.trace(trc); |
| 4062 | |
| 4063 | forEachWeakMap([trc](auto& weakMap) { weakMap.trace(trc); }); |
| 4064 | } |
| 4065 | |
| 4066 | /* static */ |
| 4067 | void DebugAPI::traceFromRealm(JSTracer* trc, Realm* realm) { |
| 4068 | JS::AutoAssertNoGC nogc; |
| 4069 | for (Realm::DebuggerVectorEntry& entry : realm->getDebuggers(nogc)) { |
| 4070 | TraceEdge(trc, &entry.debuggerLink, "realm debugger"); |
| 4071 | } |
| 4072 | } |
| 4073 | |
| 4074 | /* static */ |
| 4075 | void DebugAPI::sweepAll(JS::GCContext* gcx) { |
| 4076 | JSRuntime* rt = gcx->runtime(); |
| 4077 | |
| 4078 | Debugger* next; |
| 4079 | for (Debugger* dbg = rt->debuggerList().getFirst(); dbg; dbg = next) { |
| 4080 | next = dbg->getNext(); |
| 4081 | |
| 4082 | // Debugger.Frames for generator calls bump the JSScript's |
| 4083 | // generatorObserverCount, so the JIT will instrument the code to notify |
| 4084 | // Debugger when the generator is resumed. When a Debugger.Frame gets GC'd, |
| 4085 | // generatorObserverCount needs to be decremented. It's much easier to do |
| 4086 | // this when we know that all parties involved - the Debugger.Frame, the |
| 4087 | // generator object, and the JSScript - have not yet been finalized. |
| 4088 | // |
| 4089 | // Since DebugAPI::sweepAll is called after everything is marked, but before |
| 4090 | // anything has been finalized, this is the perfect place to drop the count. |
| 4091 | if (dbg->zone()->isGCSweeping()) { |
| 4092 | for (Debugger::GeneratorWeakMap::Enum e(dbg->generatorFrames); !e.empty(); |
| 4093 | e.popFront()) { |
| 4094 | DebuggerFrame* frameObj = e.front().value(); |
| 4095 | if (IsAboutToBeFinalizedUnbarriered(frameObj)) { |
| 4096 | // If the DebuggerFrame is being finalized, that means either: |
| 4097 | // 1) It is not present in "frames". |
| 4098 | // 2) The Debugger itself is also being finalized. |
| 4099 | // |
| 4100 | // In the first case, passing the frame is not necessary because there |
| 4101 | // isn't a frame entry to clear, and in the second case, |
| 4102 | // removeDebuggeeGlobal below will iterate and remove the entries |
| 4103 | // anyway, so things will be cleaned up properly. |
| 4104 | Debugger::terminateDebuggerFrame(gcx, dbg, frameObj, NullFramePtr(), |
| 4105 | nullptr, &e); |
| 4106 | } |
| 4107 | } |
| 4108 | } |
| 4109 | |
| 4110 | // Detach dying debuggers and debuggees from each other. Since this |
| 4111 | // requires access to both objects it must be done before either |
| 4112 | // object is finalized. |
| 4113 | bool debuggerDying = IsAboutToBeFinalized(dbg->object); |
| 4114 | for (WeakGlobalObjectSet::Enum e(dbg->debuggees); !e.empty(); |
| 4115 | e.popFront()) { |
| 4116 | GlobalObject* global = e.front().unbarrieredGet(); |
| 4117 | if (debuggerDying || IsAboutToBeFinalizedUnbarriered(global)) { |
| 4118 | dbg->removeDebuggeeGlobal(gcx, e.front().unbarrieredGet(), &e, |
| 4119 | Debugger::FromSweep::Yes); |
| 4120 | } |
| 4121 | } |
| 4122 | |
| 4123 | if (debuggerDying) { |
| 4124 | gcx->delete_(dbg->object, dbg, MemoryUse::Debugger); |
| 4125 | } |
| 4126 | |
| 4127 | dbg = next; |
Value stored to 'dbg' is never read | |
| 4128 | } |
| 4129 | } |
| 4130 | |
| 4131 | static inline bool SweepZonesInSameGroup(Zone* a, Zone* b) { |
| 4132 | // Ensure two zones are swept in the same sweep group by adding an edge |
| 4133 | // between them in each direction. |
| 4134 | return a->addSweepGroupEdgeTo(b) && b->addSweepGroupEdgeTo(a); |
| 4135 | } |
| 4136 | |
| 4137 | /* static */ |
| 4138 | bool DebugAPI::findSweepGroupEdges(JSRuntime* rt) { |
| 4139 | // Ensure that debuggers and their debuggees are finalized in the same group |
| 4140 | // by adding edges in both directions for debuggee zones. These are weak |
| 4141 | // references that are not in the cross compartment wrapper map. |
| 4142 | |
| 4143 | for (Debugger* dbg : rt->debuggerList()) { |
| 4144 | Zone* debuggerZone = dbg->object->zone(); |
| 4145 | if (!debuggerZone->isGCMarking()) { |
| 4146 | continue; |
| 4147 | } |
| 4148 | |
| 4149 | for (auto e = dbg->debuggeeZones.all(); !e.empty(); e.popFront()) { |
| 4150 | Zone* debuggeeZone = e.front(); |
| 4151 | if (!debuggeeZone->isGCMarking()) { |
| 4152 | continue; |
| 4153 | } |
| 4154 | |
| 4155 | if (!SweepZonesInSameGroup(debuggerZone, debuggeeZone)) { |
| 4156 | return false; |
| 4157 | } |
| 4158 | } |
| 4159 | } |
| 4160 | |
| 4161 | return true; |
| 4162 | } |
| 4163 | |
| 4164 | template <class UnbarrieredKey, class Wrapper, bool InvisibleKeysOk> |
| 4165 | bool DebuggerWeakMap<UnbarrieredKey, Wrapper, |
| 4166 | InvisibleKeysOk>::findSweepGroupEdges() { |
| 4167 | Zone* debuggerZone = zone(); |
| 4168 | MOZ_ASSERT(debuggerZone->isGCMarking())do { static_assert( mozilla::detail::AssertionConditionType< decltype(debuggerZone->isGCMarking())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(debuggerZone->isGCMarking ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("debuggerZone->isGCMarking()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 4168); AnnotateMozCrashReason("MOZ_ASSERT" "(" "debuggerZone->isGCMarking()" ")"); do { *((volatile int*)__null) = 4168; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4169 | for (Enum e(*this); !e.empty(); e.popFront()) { |
| 4170 | MOZ_ASSERT(e.front().value()->zone() == debuggerZone)do { static_assert( mozilla::detail::AssertionConditionType< decltype(e.front().value()->zone() == debuggerZone)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(e.front().value()->zone() == debuggerZone))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("e.front().value()->zone() == debuggerZone" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 4170); AnnotateMozCrashReason("MOZ_ASSERT" "(" "e.front().value()->zone() == debuggerZone" ")"); do { *((volatile int*)__null) = 4170; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4171 | |
| 4172 | Zone* keyZone = e.front().key()->zone(); |
| 4173 | if (keyZone->isGCMarking() && |
| 4174 | !SweepZonesInSameGroup(debuggerZone, keyZone)) { |
| 4175 | return false; |
| 4176 | } |
| 4177 | } |
| 4178 | |
| 4179 | // Add in edges for delegates, if relevant for the key type. |
| 4180 | return Base::findSweepGroupEdges(); |
| 4181 | } |
| 4182 | |
| 4183 | const JSClassOps DebuggerInstanceObject::classOps_ = { |
| 4184 | nullptr, // addProperty |
| 4185 | nullptr, // delProperty |
| 4186 | nullptr, // enumerate |
| 4187 | nullptr, // newEnumerate |
| 4188 | nullptr, // resolve |
| 4189 | nullptr, // mayResolve |
| 4190 | nullptr, // finalize |
| 4191 | nullptr, // call |
| 4192 | nullptr, // construct |
| 4193 | Debugger::traceObject, // trace |
| 4194 | }; |
| 4195 | |
| 4196 | const JSClass DebuggerInstanceObject::class_ = { |
| 4197 | "Debugger", |
| 4198 | JSCLASS_HAS_RESERVED_SLOTS(Debugger::JSSLOT_DEBUG_COUNT), |
| 4199 | &classOps_, |
| 4200 | }; |
| 4201 | |
| 4202 | static_assert(Debugger::JSSLOT_DEBUG_PROTO_START == 0, |
| 4203 | "DebuggerPrototypeObject only needs slots for the proto objects"); |
| 4204 | |
| 4205 | const JSClass DebuggerPrototypeObject::class_ = { |
| 4206 | "DebuggerPrototype", |
| 4207 | JSCLASS_HAS_RESERVED_SLOTS(Debugger::JSSLOT_DEBUG_PROTO_STOP), |
| 4208 | }; |
| 4209 | |
| 4210 | static Debugger* Debugger_fromThisValue(JSContext* cx, const CallArgs& args, |
| 4211 | const char* fnname) { |
| 4212 | JSObject* thisobj = RequireObject(cx, args.thisv()); |
| 4213 | if (!thisobj) { |
| 4214 | return nullptr; |
| 4215 | } |
| 4216 | if (!thisobj->is<DebuggerInstanceObject>()) { |
| 4217 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 4218 | JSMSG_INCOMPATIBLE_PROTO, "Debugger", fnname, |
| 4219 | thisobj->getClass()->name); |
| 4220 | return nullptr; |
| 4221 | } |
| 4222 | |
| 4223 | Debugger* dbg = Debugger::fromJSObject(thisobj); |
| 4224 | MOZ_ASSERT(dbg)do { static_assert( mozilla::detail::AssertionConditionType< decltype(dbg)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(dbg))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("dbg", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 4224); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dbg" ")"); do { *((volatile int*)__null) = 4224; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 4225 | return dbg; |
| 4226 | } |
| 4227 | |
| 4228 | struct MOZ_STACK_CLASS Debugger::CallData { |
| 4229 | JSContext* cx; |
| 4230 | const CallArgs& args; |
| 4231 | |
| 4232 | Debugger* dbg; |
| 4233 | |
| 4234 | CallData(JSContext* cx, const CallArgs& args, Debugger* dbg) |
| 4235 | : cx(cx), args(args), dbg(dbg) {} |
| 4236 | |
| 4237 | bool getOnDebuggerStatement(); |
| 4238 | bool setOnDebuggerStatement(); |
| 4239 | bool getOnExceptionUnwind(); |
| 4240 | bool setOnExceptionUnwind(); |
| 4241 | bool getOnNewScript(); |
| 4242 | bool setOnNewScript(); |
| 4243 | bool getOnEnterFrame(); |
| 4244 | bool setOnEnterFrame(); |
| 4245 | bool getOnNativeCall(); |
| 4246 | bool setOnNativeCall(); |
| 4247 | bool getShouldAvoidSideEffects(); |
| 4248 | bool setShouldAvoidSideEffects(); |
| 4249 | bool getOnNewGlobalObject(); |
| 4250 | bool setOnNewGlobalObject(); |
| 4251 | bool getOnNewPromise(); |
| 4252 | bool setOnNewPromise(); |
| 4253 | bool getOnPromiseSettled(); |
| 4254 | bool setOnPromiseSettled(); |
| 4255 | bool getUncaughtExceptionHook(); |
| 4256 | bool setUncaughtExceptionHook(); |
| 4257 | bool getAllowUnobservedAsmJS(); |
| 4258 | bool setAllowUnobservedAsmJS(); |
| 4259 | bool getAllowUnobservedWasm(); |
| 4260 | bool setAllowUnobservedWasm(); |
| 4261 | bool getExclusiveDebuggerOnEval(); |
| 4262 | bool setExclusiveDebuggerOnEval(); |
| 4263 | bool getInspectNativeCallArguments(); |
| 4264 | bool setInspectNativeCallArguments(); |
| 4265 | bool getCollectCoverageInfo(); |
| 4266 | bool setCollectCoverageInfo(); |
| 4267 | bool getMemory(); |
| 4268 | bool addDebuggee(); |
| 4269 | bool addAllGlobalsAsDebuggees(); |
| 4270 | bool removeDebuggee(); |
| 4271 | bool removeAllDebuggees(); |
| 4272 | bool hasDebuggee(); |
| 4273 | bool getDebuggees(); |
| 4274 | bool getNewestFrame(); |
| 4275 | bool clearAllBreakpoints(); |
| 4276 | bool findScripts(); |
| 4277 | bool findSources(); |
| 4278 | bool findObjects(); |
| 4279 | bool findAllGlobals(); |
| 4280 | bool findSourceURLs(); |
| 4281 | bool makeGlobalObjectReference(); |
| 4282 | bool adoptDebuggeeValue(); |
| 4283 | bool adoptFrame(); |
| 4284 | bool adoptSource(); |
| 4285 | bool enableAsyncStack(); |
| 4286 | bool disableAsyncStack(); |
| 4287 | bool enableUnlimitedStacksCapturing(); |
| 4288 | bool disableUnlimitedStacksCapturing(); |
| 4289 | |
| 4290 | using Method = bool (CallData::*)(); |
| 4291 | |
| 4292 | template <Method MyMethod> |
| 4293 | static bool ToNative(JSContext* cx, unsigned argc, Value* vp); |
| 4294 | }; |
| 4295 | |
| 4296 | template <Debugger::CallData::Method MyMethod> |
| 4297 | /* static */ |
| 4298 | bool Debugger::CallData::ToNative(JSContext* cx, unsigned argc, Value* vp) { |
| 4299 | CallArgs args = CallArgsFromVp(argc, vp); |
| 4300 | |
| 4301 | Debugger* dbg = Debugger_fromThisValue(cx, args, "method"); |
| 4302 | if (!dbg) { |
| 4303 | return false; |
| 4304 | } |
| 4305 | |
| 4306 | CallData data(cx, args, dbg); |
| 4307 | return (data.*MyMethod)(); |
| 4308 | } |
| 4309 | |
| 4310 | /* static */ |
| 4311 | bool Debugger::getHookImpl(JSContext* cx, const CallArgs& args, Debugger& dbg, |
| 4312 | Hook which) { |
| 4313 | MOZ_ASSERT(which >= 0 && which < HookCount)do { static_assert( mozilla::detail::AssertionConditionType< decltype(which >= 0 && which < HookCount)>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(which >= 0 && which < HookCount))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("which >= 0 && which < HookCount" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 4313); AnnotateMozCrashReason("MOZ_ASSERT" "(" "which >= 0 && which < HookCount" ")"); do { *((volatile int*)__null) = 4313; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4314 | args.rval().set(dbg.object->getReservedSlot( |
| 4315 | JSSLOT_DEBUG_HOOK_START + std::underlying_type_t<Hook>(which))); |
| 4316 | return true; |
| 4317 | } |
| 4318 | |
| 4319 | /* static */ |
| 4320 | bool Debugger::setHookImpl(JSContext* cx, const CallArgs& args, Debugger& dbg, |
| 4321 | Hook which) { |
| 4322 | MOZ_ASSERT(which >= 0 && which < HookCount)do { static_assert( mozilla::detail::AssertionConditionType< decltype(which >= 0 && which < HookCount)>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(which >= 0 && which < HookCount))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("which >= 0 && which < HookCount" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 4322); AnnotateMozCrashReason("MOZ_ASSERT" "(" "which >= 0 && which < HookCount" ")"); do { *((volatile int*)__null) = 4322; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4323 | if (!args.requireAtLeast(cx, "Debugger.setHook", 1)) { |
| 4324 | return false; |
| 4325 | } |
| 4326 | if (args[0].isObject()) { |
| 4327 | if (!args[0].toObject().isCallable()) { |
| 4328 | return ReportIsNotFunction(cx, args[0], args.length() - 1); |
| 4329 | } |
| 4330 | } else if (!args[0].isUndefined()) { |
| 4331 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 4332 | JSMSG_NOT_CALLABLE_OR_UNDEFINED); |
| 4333 | return false; |
| 4334 | } |
| 4335 | |
| 4336 | // Disallow simultaneous activation of OnEnterFrame and code coverage support; |
| 4337 | // as they both use the execution observer flag. See Bug 1608891. |
| 4338 | if (dbg.collectCoverageInfo && which == Hook::OnEnterFrame) { |
| 4339 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 4340 | JSMSG_DEBUG_EXCLUSIVE_FRAME_COVERAGE); |
| 4341 | return false; |
| 4342 | } |
| 4343 | |
| 4344 | uint32_t slot = JSSLOT_DEBUG_HOOK_START + std::underlying_type_t<Hook>(which); |
| 4345 | RootedValue oldHook(cx, dbg.object->getReservedSlot(slot)); |
| 4346 | dbg.object->setReservedSlot(slot, args[0]); |
| 4347 | if (hookObservesAllExecution(which)) { |
| 4348 | if (!dbg.updateObservesAllExecutionOnDebuggees( |
| 4349 | cx, dbg.observesAllExecution())) { |
| 4350 | dbg.object->setReservedSlot(slot, oldHook); |
| 4351 | return false; |
| 4352 | } |
| 4353 | } |
| 4354 | |
| 4355 | Rooted<DebuggerDebuggeeLink*> debuggeeLink(cx, dbg.getDebuggeeLink()); |
| 4356 | if (dbg.hasAnyLiveHooks()) { |
| 4357 | debuggeeLink->setLinkSlot(dbg); |
| 4358 | } else { |
| 4359 | debuggeeLink->clearLinkSlot(); |
| 4360 | } |
| 4361 | |
| 4362 | args.rval().setUndefined(); |
| 4363 | return true; |
| 4364 | } |
| 4365 | |
| 4366 | /* static */ |
| 4367 | bool Debugger::getGarbageCollectionHook(JSContext* cx, const CallArgs& args, |
| 4368 | Debugger& dbg) { |
| 4369 | return getHookImpl(cx, args, dbg, OnGarbageCollection); |
| 4370 | } |
| 4371 | |
| 4372 | /* static */ |
| 4373 | bool Debugger::setGarbageCollectionHook(JSContext* cx, const CallArgs& args, |
| 4374 | Debugger& dbg) { |
| 4375 | Rooted<JSObject*> oldHook(cx, dbg.getHook(OnGarbageCollection)); |
| 4376 | |
| 4377 | if (!setHookImpl(cx, args, dbg, OnGarbageCollection)) { |
| 4378 | // We want to maintain the invariant that the hook is always set when the |
| 4379 | // Debugger is in the runtime's list, and vice-versa, so if we return early |
| 4380 | // and don't adjust the watcher list below, we need to be sure that the |
| 4381 | // hook didn't change. |
| 4382 | MOZ_ASSERT(dbg.getHook(OnGarbageCollection) == oldHook)do { static_assert( mozilla::detail::AssertionConditionType< decltype(dbg.getHook(OnGarbageCollection) == oldHook)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(dbg.getHook(OnGarbageCollection) == oldHook))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("dbg.getHook(OnGarbageCollection) == oldHook" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 4382); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dbg.getHook(OnGarbageCollection) == oldHook" ")"); do { *((volatile int*)__null) = 4382; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4383 | return false; |
| 4384 | } |
| 4385 | |
| 4386 | // Add or remove ourselves from the runtime's list of Debuggers that care |
| 4387 | // about garbage collection. |
| 4388 | JSObject* newHook = dbg.getHook(OnGarbageCollection); |
| 4389 | if (!oldHook && newHook) { |
| 4390 | cx->runtime()->onGarbageCollectionWatchers().pushBack(&dbg); |
| 4391 | } else if (oldHook && !newHook) { |
| 4392 | cx->runtime()->onGarbageCollectionWatchers().remove(&dbg); |
| 4393 | } |
| 4394 | |
| 4395 | return true; |
| 4396 | } |
| 4397 | |
| 4398 | bool Debugger::CallData::getOnDebuggerStatement() { |
| 4399 | return getHookImpl(cx, args, *dbg, OnDebuggerStatement); |
| 4400 | } |
| 4401 | |
| 4402 | bool Debugger::CallData::setOnDebuggerStatement() { |
| 4403 | return setHookImpl(cx, args, *dbg, OnDebuggerStatement); |
| 4404 | } |
| 4405 | |
| 4406 | bool Debugger::CallData::getOnExceptionUnwind() { |
| 4407 | return getHookImpl(cx, args, *dbg, OnExceptionUnwind); |
| 4408 | } |
| 4409 | |
| 4410 | bool Debugger::CallData::setOnExceptionUnwind() { |
| 4411 | return setHookImpl(cx, args, *dbg, OnExceptionUnwind); |
| 4412 | } |
| 4413 | |
| 4414 | bool Debugger::CallData::getOnNewScript() { |
| 4415 | return getHookImpl(cx, args, *dbg, OnNewScript); |
| 4416 | } |
| 4417 | |
| 4418 | bool Debugger::CallData::setOnNewScript() { |
| 4419 | return setHookImpl(cx, args, *dbg, OnNewScript); |
| 4420 | } |
| 4421 | |
| 4422 | bool Debugger::CallData::getOnNewPromise() { |
| 4423 | return getHookImpl(cx, args, *dbg, OnNewPromise); |
| 4424 | } |
| 4425 | |
| 4426 | bool Debugger::CallData::setOnNewPromise() { |
| 4427 | return setHookImpl(cx, args, *dbg, OnNewPromise); |
| 4428 | } |
| 4429 | |
| 4430 | bool Debugger::CallData::getOnPromiseSettled() { |
| 4431 | return getHookImpl(cx, args, *dbg, OnPromiseSettled); |
| 4432 | } |
| 4433 | |
| 4434 | bool Debugger::CallData::setOnPromiseSettled() { |
| 4435 | return setHookImpl(cx, args, *dbg, OnPromiseSettled); |
| 4436 | } |
| 4437 | |
| 4438 | bool Debugger::CallData::getOnEnterFrame() { |
| 4439 | return getHookImpl(cx, args, *dbg, OnEnterFrame); |
| 4440 | } |
| 4441 | |
| 4442 | bool Debugger::CallData::setOnEnterFrame() { |
| 4443 | return setHookImpl(cx, args, *dbg, OnEnterFrame); |
| 4444 | } |
| 4445 | |
| 4446 | bool Debugger::CallData::getOnNativeCall() { |
| 4447 | return getHookImpl(cx, args, *dbg, OnNativeCall); |
| 4448 | } |
| 4449 | |
| 4450 | bool Debugger::CallData::setOnNativeCall() { |
| 4451 | RootedObject oldHook(cx, dbg->getHook(OnNativeCall)); |
| 4452 | |
| 4453 | if (!setHookImpl(cx, args, *dbg, OnNativeCall)) { |
| 4454 | return false; |
| 4455 | } |
| 4456 | |
| 4457 | JSObject* newHook = dbg->getHook(OnNativeCall); |
| 4458 | if (!oldHook && newHook) { |
| 4459 | dbg->updateObservesNativeCallOnDebuggees(Observing); |
| 4460 | } else if (oldHook && !newHook) { |
| 4461 | dbg->updateObservesNativeCallOnDebuggees(NotObserving); |
| 4462 | } |
| 4463 | |
| 4464 | return true; |
| 4465 | } |
| 4466 | |
| 4467 | bool Debugger::CallData::getShouldAvoidSideEffects() { |
| 4468 | args.rval().setBoolean(dbg->shouldAvoidSideEffects); |
| 4469 | return true; |
| 4470 | } |
| 4471 | |
| 4472 | bool Debugger::CallData::setShouldAvoidSideEffects() { |
| 4473 | if (!args.requireAtLeast(cx, "Debugger.set shouldAvoidSideEffects", 1)) { |
| 4474 | return false; |
| 4475 | } |
| 4476 | |
| 4477 | dbg->shouldAvoidSideEffects = ToBoolean(args[0]); |
| 4478 | |
| 4479 | args.rval().setUndefined(); |
| 4480 | return true; |
| 4481 | } |
| 4482 | |
| 4483 | bool Debugger::CallData::getOnNewGlobalObject() { |
| 4484 | return getHookImpl(cx, args, *dbg, OnNewGlobalObject); |
| 4485 | } |
| 4486 | |
| 4487 | bool Debugger::CallData::setOnNewGlobalObject() { |
| 4488 | RootedObject oldHook(cx, dbg->getHook(OnNewGlobalObject)); |
| 4489 | |
| 4490 | if (!setHookImpl(cx, args, *dbg, OnNewGlobalObject)) { |
| 4491 | return false; |
| 4492 | } |
| 4493 | |
| 4494 | // Add or remove ourselves from the runtime's list of Debuggers that care |
| 4495 | // about new globals. |
| 4496 | JSObject* newHook = dbg->getHook(OnNewGlobalObject); |
| 4497 | if (!oldHook && newHook) { |
| 4498 | cx->runtime()->onNewGlobalObjectWatchers().pushBack(dbg); |
| 4499 | } else if (oldHook && !newHook) { |
| 4500 | cx->runtime()->onNewGlobalObjectWatchers().remove(dbg); |
| 4501 | } |
| 4502 | |
| 4503 | return true; |
| 4504 | } |
| 4505 | |
| 4506 | bool Debugger::CallData::getUncaughtExceptionHook() { |
| 4507 | args.rval().setObjectOrNull(dbg->uncaughtExceptionHook); |
| 4508 | return true; |
| 4509 | } |
| 4510 | |
| 4511 | bool Debugger::CallData::setUncaughtExceptionHook() { |
| 4512 | if (!args.requireAtLeast(cx, "Debugger.set uncaughtExceptionHook", 1)) { |
| 4513 | return false; |
| 4514 | } |
| 4515 | if (!args[0].isNull() && |
| 4516 | (!args[0].isObject() || !args[0].toObject().isCallable())) { |
| 4517 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 4518 | JSMSG_ASSIGN_FUNCTION_OR_NULL, |
| 4519 | "uncaughtExceptionHook"); |
| 4520 | return false; |
| 4521 | } |
| 4522 | dbg->uncaughtExceptionHook = args[0].toObjectOrNull(); |
| 4523 | args.rval().setUndefined(); |
| 4524 | return true; |
| 4525 | } |
| 4526 | |
| 4527 | bool Debugger::CallData::getAllowUnobservedAsmJS() { |
| 4528 | args.rval().setBoolean(dbg->allowUnobservedAsmJS); |
| 4529 | return true; |
| 4530 | } |
| 4531 | |
| 4532 | bool Debugger::CallData::setAllowUnobservedAsmJS() { |
| 4533 | if (!args.requireAtLeast(cx, "Debugger.set allowUnobservedAsmJS", 1)) { |
| 4534 | return false; |
| 4535 | } |
| 4536 | dbg->allowUnobservedAsmJS = ToBoolean(args[0]); |
| 4537 | |
| 4538 | for (WeakGlobalObjectSet::Range r = dbg->debuggees.all(); !r.empty(); |
| 4539 | r.popFront()) { |
| 4540 | GlobalObject* global = r.front(); |
| 4541 | Realm* realm = global->realm(); |
| 4542 | realm->updateDebuggerObservesAsmJS(); |
| 4543 | } |
| 4544 | |
| 4545 | args.rval().setUndefined(); |
| 4546 | return true; |
| 4547 | } |
| 4548 | |
| 4549 | bool Debugger::CallData::getAllowUnobservedWasm() { |
| 4550 | args.rval().setBoolean(dbg->allowUnobservedWasm); |
| 4551 | return true; |
| 4552 | } |
| 4553 | |
| 4554 | bool Debugger::CallData::setAllowUnobservedWasm() { |
| 4555 | if (!args.requireAtLeast(cx, "Debugger.set allowUnobservedWasm", 1)) { |
| 4556 | return false; |
| 4557 | } |
| 4558 | dbg->allowUnobservedWasm = ToBoolean(args[0]); |
| 4559 | |
| 4560 | for (WeakGlobalObjectSet::Range r = dbg->debuggees.all(); !r.empty(); |
| 4561 | r.popFront()) { |
| 4562 | GlobalObject* global = r.front(); |
| 4563 | Realm* realm = global->realm(); |
| 4564 | realm->updateDebuggerObservesWasm(); |
| 4565 | } |
| 4566 | |
| 4567 | args.rval().setUndefined(); |
| 4568 | return true; |
| 4569 | } |
| 4570 | |
| 4571 | bool Debugger::CallData::getExclusiveDebuggerOnEval() { |
| 4572 | args.rval().setBoolean(dbg->exclusiveDebuggerOnEval); |
| 4573 | return true; |
| 4574 | } |
| 4575 | |
| 4576 | bool Debugger::CallData::setExclusiveDebuggerOnEval() { |
| 4577 | if (!args.requireAtLeast(cx, "Debugger.set exclusiveDebuggerOnEval", 1)) { |
| 4578 | return false; |
| 4579 | } |
| 4580 | dbg->exclusiveDebuggerOnEval = ToBoolean(args[0]); |
| 4581 | |
| 4582 | args.rval().setUndefined(); |
| 4583 | return true; |
| 4584 | } |
| 4585 | |
| 4586 | bool Debugger::CallData::getInspectNativeCallArguments() { |
| 4587 | args.rval().setBoolean(dbg->inspectNativeCallArguments); |
| 4588 | return true; |
| 4589 | } |
| 4590 | |
| 4591 | bool Debugger::CallData::setInspectNativeCallArguments() { |
| 4592 | if (!args.requireAtLeast(cx, "Debugger.set inspectNativeCallArguments", 1)) { |
| 4593 | return false; |
| 4594 | } |
| 4595 | dbg->inspectNativeCallArguments = ToBoolean(args[0]); |
| 4596 | |
| 4597 | args.rval().setUndefined(); |
| 4598 | return true; |
| 4599 | } |
| 4600 | |
| 4601 | bool Debugger::CallData::getCollectCoverageInfo() { |
| 4602 | args.rval().setBoolean(dbg->collectCoverageInfo); |
| 4603 | return true; |
| 4604 | } |
| 4605 | |
| 4606 | bool Debugger::CallData::setCollectCoverageInfo() { |
| 4607 | if (!args.requireAtLeast(cx, "Debugger.set collectCoverageInfo", 1)) { |
| 4608 | return false; |
| 4609 | } |
| 4610 | |
| 4611 | // Disallow simultaneous activation of OnEnterFrame and code coverage support; |
| 4612 | // as they both use the execution observer flag. See Bug 1608891. |
| 4613 | uint32_t slot = JSSLOT_DEBUG_HOOK_START + |
| 4614 | std::underlying_type_t<Hook>(Hook::OnEnterFrame); |
| 4615 | if (!dbg->object->getReservedSlot(slot).isUndefined()) { |
| 4616 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 4617 | JSMSG_DEBUG_EXCLUSIVE_FRAME_COVERAGE); |
| 4618 | return false; |
| 4619 | } |
| 4620 | |
| 4621 | if (cx->realm()->isTracingExecution()) { |
| 4622 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 4623 | JSMSG_DEBUG_EXCLUSIVE_EXECUTION_TRACE_COVERAGE); |
| 4624 | return false; |
| 4625 | } |
| 4626 | |
| 4627 | dbg->collectCoverageInfo = ToBoolean(args[0]); |
| 4628 | |
| 4629 | IsObserving observing = dbg->collectCoverageInfo ? Observing : NotObserving; |
| 4630 | if (!dbg->updateObservesCoverageOnDebuggees(cx, observing)) { |
| 4631 | return false; |
| 4632 | } |
| 4633 | |
| 4634 | args.rval().setUndefined(); |
| 4635 | return true; |
| 4636 | } |
| 4637 | |
| 4638 | bool Debugger::CallData::getMemory() { |
| 4639 | Value memoryValue = |
| 4640 | dbg->object->getReservedSlot(JSSLOT_DEBUG_MEMORY_INSTANCE); |
| 4641 | |
| 4642 | if (!memoryValue.isObject()) { |
| 4643 | RootedObject memory(cx, DebuggerMemory::create(cx, dbg)); |
| 4644 | if (!memory) { |
| 4645 | return false; |
| 4646 | } |
| 4647 | memoryValue = ObjectValue(*memory); |
| 4648 | } |
| 4649 | |
| 4650 | args.rval().set(memoryValue); |
| 4651 | return true; |
| 4652 | } |
| 4653 | |
| 4654 | /* |
| 4655 | * Given a value used to designate a global (there's quite a variety; see the |
| 4656 | * docs), return the actual designee. |
| 4657 | * |
| 4658 | * Note that this does not check whether the designee is marked "invisible to |
| 4659 | * Debugger" or not; different callers need to handle invisible-to-Debugger |
| 4660 | * globals in different ways. |
| 4661 | */ |
| 4662 | GlobalObject* Debugger::unwrapDebuggeeArgument(JSContext* cx, const Value& v) { |
| 4663 | if (!v.isObject()) { |
| 4664 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 4665 | JSMSG_UNEXPECTED_TYPE, "argument", |
| 4666 | "not a global object"); |
| 4667 | return nullptr; |
| 4668 | } |
| 4669 | |
| 4670 | RootedObject obj(cx, &v.toObject()); |
| 4671 | |
| 4672 | // If it's a Debugger.Object belonging to this debugger, dereference that. |
| 4673 | if (obj->getClass() == &DebuggerObject::class_) { |
| 4674 | RootedValue rv(cx, v); |
| 4675 | if (!unwrapDebuggeeValue(cx, &rv)) { |
| 4676 | return nullptr; |
| 4677 | } |
| 4678 | obj = &rv.toObject(); |
| 4679 | } |
| 4680 | |
| 4681 | // If we have a cross-compartment wrapper, dereference as far as is secure. |
| 4682 | // |
| 4683 | // Since we're dealing with globals, we may have a WindowProxy here. So we |
| 4684 | // have to make sure to do a dynamic unwrap, and we want to unwrap the |
| 4685 | // WindowProxy too, if we have one. |
| 4686 | obj = CheckedUnwrapDynamic(obj, cx, /* stopAtWindowProxy = */ false); |
| 4687 | if (!obj) { |
| 4688 | ReportAccessDenied(cx); |
| 4689 | return nullptr; |
| 4690 | } |
| 4691 | |
| 4692 | if (JS_IsDeadWrapper(obj)) { |
| 4693 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_DEAD_OBJECT); |
| 4694 | return nullptr; |
| 4695 | } |
| 4696 | |
| 4697 | // If that didn't produce a global object, it's an error. |
| 4698 | if (!obj->is<GlobalObject>()) { |
| 4699 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 4700 | JSMSG_UNEXPECTED_TYPE, "argument", |
| 4701 | "not a global object"); |
| 4702 | return nullptr; |
| 4703 | } |
| 4704 | |
| 4705 | return &obj->as<GlobalObject>(); |
| 4706 | } |
| 4707 | |
| 4708 | bool Debugger::CallData::addDebuggee() { |
| 4709 | if (!args.requireAtLeast(cx, "Debugger.addDebuggee", 1)) { |
| 4710 | return false; |
| 4711 | } |
| 4712 | Rooted<GlobalObject*> global(cx, dbg->unwrapDebuggeeArgument(cx, args[0])); |
| 4713 | if (!global) { |
| 4714 | return false; |
| 4715 | } |
| 4716 | |
| 4717 | if (!dbg->addDebuggeeGlobal(cx, global)) { |
| 4718 | return false; |
| 4719 | } |
| 4720 | |
| 4721 | RootedValue v(cx, ObjectValue(*global)); |
| 4722 | if (!dbg->wrapDebuggeeValue(cx, &v)) { |
| 4723 | return false; |
| 4724 | } |
| 4725 | args.rval().set(v); |
| 4726 | return true; |
| 4727 | } |
| 4728 | |
| 4729 | bool Debugger::CallData::addAllGlobalsAsDebuggees() { |
| 4730 | for (CompartmentsIter comp(cx->runtime()); !comp.done(); comp.next()) { |
| 4731 | if (comp == dbg->object->compartment()) { |
| 4732 | continue; |
| 4733 | } |
| 4734 | for (RealmsInCompartmentIter r(comp); !r.done(); r.next()) { |
| 4735 | if (r->creationOptions().invisibleToDebugger()) { |
| 4736 | continue; |
| 4737 | } |
| 4738 | if (!r->hasInitializedGlobal()) { |
| 4739 | continue; |
| 4740 | } |
| 4741 | r->compartment()->gcState.scheduledForDestruction = false; |
| 4742 | Rooted<GlobalObject*> global(cx, r->maybeGlobal()); |
| 4743 | MOZ_ASSERT(global)do { static_assert( mozilla::detail::AssertionConditionType< decltype(global)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(global))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("global", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 4743); AnnotateMozCrashReason("MOZ_ASSERT" "(" "global" ")" ); do { *((volatile int*)__null) = 4743; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4744 | if (!dbg->addDebuggeeGlobal(cx, global)) { |
| 4745 | return false; |
| 4746 | } |
| 4747 | } |
| 4748 | } |
| 4749 | |
| 4750 | args.rval().setUndefined(); |
| 4751 | return true; |
| 4752 | } |
| 4753 | |
| 4754 | bool Debugger::CallData::removeDebuggee() { |
| 4755 | if (!args.requireAtLeast(cx, "Debugger.removeDebuggee", 1)) { |
| 4756 | return false; |
| 4757 | } |
| 4758 | Rooted<GlobalObject*> global(cx, dbg->unwrapDebuggeeArgument(cx, args[0])); |
| 4759 | if (!global) { |
| 4760 | return false; |
| 4761 | } |
| 4762 | |
| 4763 | ExecutionObservableRealms obs(cx); |
| 4764 | |
| 4765 | if (dbg->debuggees.has(global)) { |
| 4766 | dbg->removeDebuggeeGlobal(cx->gcContext(), global, nullptr, FromSweep::No); |
| 4767 | |
| 4768 | // Only update the realm if there are no Debuggers left, as it's |
| 4769 | // expensive to check if no other Debugger has a live script or frame |
| 4770 | // hook on any of the current on-stack debuggee frames. |
| 4771 | if (!global->hasDebuggers() && !obs.add(global->realm())) { |
| 4772 | return false; |
| 4773 | } |
| 4774 | if (!updateExecutionObservability(cx, obs, NotObserving)) { |
| 4775 | return false; |
| 4776 | } |
| 4777 | } |
| 4778 | |
| 4779 | args.rval().setUndefined(); |
| 4780 | return true; |
| 4781 | } |
| 4782 | |
| 4783 | bool Debugger::CallData::removeAllDebuggees() { |
| 4784 | ExecutionObservableRealms obs(cx); |
| 4785 | |
| 4786 | for (WeakGlobalObjectSet::Enum e(dbg->debuggees); !e.empty(); e.popFront()) { |
| 4787 | Rooted<GlobalObject*> global(cx, e.front()); |
| 4788 | dbg->removeDebuggeeGlobal(cx->gcContext(), global, &e, FromSweep::No); |
| 4789 | |
| 4790 | // See note about adding to the observable set in removeDebuggee. |
| 4791 | if (!global->hasDebuggers() && !obs.add(global->realm())) { |
| 4792 | return false; |
| 4793 | } |
| 4794 | } |
| 4795 | |
| 4796 | if (!updateExecutionObservability(cx, obs, NotObserving)) { |
| 4797 | return false; |
| 4798 | } |
| 4799 | |
| 4800 | args.rval().setUndefined(); |
| 4801 | return true; |
| 4802 | } |
| 4803 | |
| 4804 | bool Debugger::CallData::hasDebuggee() { |
| 4805 | if (!args.requireAtLeast(cx, "Debugger.hasDebuggee", 1)) { |
| 4806 | return false; |
| 4807 | } |
| 4808 | GlobalObject* global = dbg->unwrapDebuggeeArgument(cx, args[0]); |
| 4809 | if (!global) { |
| 4810 | return false; |
| 4811 | } |
| 4812 | args.rval().setBoolean(!!dbg->debuggees.lookup(global)); |
| 4813 | return true; |
| 4814 | } |
| 4815 | |
| 4816 | bool Debugger::CallData::getDebuggees() { |
| 4817 | // Obtain the list of debuggees before wrapping each debuggee, as a GC could |
| 4818 | // update the debuggees set while we are iterating it. |
| 4819 | unsigned count = dbg->debuggees.count(); |
| 4820 | RootedValueVector debuggees(cx); |
| 4821 | if (!debuggees.resize(count)) { |
| 4822 | return false; |
| 4823 | } |
| 4824 | unsigned i = 0; |
| 4825 | { |
| 4826 | JS::AutoCheckCannotGC nogc; |
| 4827 | for (WeakGlobalObjectSet::Enum e(dbg->debuggees); !e.empty(); |
| 4828 | e.popFront()) { |
| 4829 | debuggees[i++].setObject(*e.front().get()); |
| 4830 | } |
| 4831 | } |
| 4832 | |
| 4833 | Rooted<ArrayObject*> arrobj(cx, NewDenseFullyAllocatedArray(cx, count)); |
| 4834 | if (!arrobj) { |
| 4835 | return false; |
| 4836 | } |
| 4837 | arrobj->ensureDenseInitializedLength(0, count); |
| 4838 | for (i = 0; i < count; i++) { |
| 4839 | RootedValue v(cx, debuggees[i]); |
| 4840 | if (!dbg->wrapDebuggeeValue(cx, &v)) { |
| 4841 | return false; |
| 4842 | } |
| 4843 | arrobj->setDenseElement(i, v); |
| 4844 | } |
| 4845 | |
| 4846 | args.rval().setObject(*arrobj); |
| 4847 | return true; |
| 4848 | } |
| 4849 | |
| 4850 | bool Debugger::CallData::getNewestFrame() { |
| 4851 | // Since there may be multiple contexts, use AllFramesIter. |
| 4852 | for (AllFramesIter i(cx); !i.done(); ++i) { |
| 4853 | if (dbg->observesFrame(i)) { |
| 4854 | // Ensure that Ion frames are rematerialized. Only rematerialized |
| 4855 | // Ion frames may be used as AbstractFramePtrs. |
| 4856 | if (i.isIon() && !i.ensureHasRematerializedFrame(cx)) { |
| 4857 | return false; |
| 4858 | } |
| 4859 | AbstractFramePtr frame = i.abstractFramePtr(); |
| 4860 | FrameIter iter(i.activation()->cx()); |
| 4861 | while (!iter.hasUsableAbstractFramePtr() || |
| 4862 | iter.abstractFramePtr() != frame) { |
| 4863 | ++iter; |
| 4864 | } |
| 4865 | return dbg->getFrame(cx, iter, args.rval()); |
| 4866 | } |
| 4867 | } |
| 4868 | args.rval().setNull(); |
| 4869 | return true; |
| 4870 | } |
| 4871 | |
| 4872 | bool Debugger::CallData::clearAllBreakpoints() { |
| 4873 | JS::GCContext* gcx = cx->gcContext(); |
| 4874 | Breakpoint* nextbp; |
| 4875 | for (Breakpoint* bp = dbg->firstBreakpoint(); bp; bp = nextbp) { |
| 4876 | nextbp = bp->nextInDebugger(); |
| 4877 | |
| 4878 | bp->remove(gcx); |
| 4879 | } |
| 4880 | MOZ_ASSERT(!dbg->firstBreakpoint())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!dbg->firstBreakpoint())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!dbg->firstBreakpoint())) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!dbg->firstBreakpoint()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 4880); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!dbg->firstBreakpoint()" ")"); do { *((volatile int*)__null) = 4880; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4881 | |
| 4882 | return true; |
| 4883 | } |
| 4884 | |
| 4885 | /* static */ |
| 4886 | bool Debugger::construct(JSContext* cx, unsigned argc, Value* vp) { |
| 4887 | CallArgs args = CallArgsFromVp(argc, vp); |
| 4888 | |
| 4889 | // Check that the arguments, if any, are cross-compartment wrappers. |
| 4890 | for (unsigned i = 0; i < args.length(); i++) { |
| 4891 | JSObject* argobj = RequireObject(cx, args[i]); |
| 4892 | if (!argobj) { |
| 4893 | return false; |
| 4894 | } |
| 4895 | if (!argobj->is<CrossCompartmentWrapperObject>()) { |
| 4896 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 4897 | JSMSG_DEBUG_CCW_REQUIRED, "Debugger"); |
| 4898 | return false; |
| 4899 | } |
| 4900 | } |
| 4901 | |
| 4902 | // Get Debugger.prototype. |
| 4903 | RootedValue v(cx); |
| 4904 | RootedObject callee(cx, &args.callee()); |
| 4905 | if (!GetProperty(cx, callee, callee, cx->names().prototype, &v)) { |
| 4906 | return false; |
| 4907 | } |
| 4908 | Rooted<NativeObject*> proto(cx, &v.toObject().as<NativeObject>()); |
| 4909 | MOZ_ASSERT(proto->is<DebuggerPrototypeObject>())do { static_assert( mozilla::detail::AssertionConditionType< decltype(proto->is<DebuggerPrototypeObject>())>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(proto->is<DebuggerPrototypeObject>()))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("proto->is<DebuggerPrototypeObject>()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 4909); AnnotateMozCrashReason("MOZ_ASSERT" "(" "proto->is<DebuggerPrototypeObject>()" ")"); do { *((volatile int*)__null) = 4909; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 4910 | |
| 4911 | // Make the new Debugger object. Each one has a reference to |
| 4912 | // Debugger.{Frame,Object,Script,Memory}.prototype in reserved slots. The |
| 4913 | // rest of the reserved slots are for hooks; they default to undefined. |
| 4914 | Rooted<DebuggerInstanceObject*> obj( |
| 4915 | cx, NewTenuredObjectWithGivenProto<DebuggerInstanceObject>(cx, proto)); |
| 4916 | if (!obj) { |
| 4917 | return false; |
| 4918 | } |
| 4919 | for (unsigned slot = JSSLOT_DEBUG_PROTO_START; slot < JSSLOT_DEBUG_PROTO_STOP; |
| 4920 | slot++) { |
| 4921 | obj->setReservedSlot(slot, proto->getReservedSlot(slot)); |
| 4922 | } |
| 4923 | obj->setReservedSlot(JSSLOT_DEBUG_MEMORY_INSTANCE, NullValue()); |
| 4924 | |
| 4925 | Rooted<NativeObject*> livenessLink( |
| 4926 | cx, NewObjectWithGivenProto<DebuggerDebuggeeLink>(cx, nullptr)); |
| 4927 | if (!livenessLink) { |
| 4928 | return false; |
| 4929 | } |
| 4930 | obj->setReservedSlot(JSSLOT_DEBUG_DEBUGGEE_LINK, ObjectValue(*livenessLink)); |
| 4931 | |
| 4932 | Debugger* debugger; |
| 4933 | { |
| 4934 | // Construct the underlying C++ object. |
| 4935 | auto dbg = cx->make_unique<Debugger>(cx, obj.get()); |
| 4936 | if (!dbg) { |
| 4937 | return false; |
| 4938 | } |
| 4939 | |
| 4940 | // The object owns the released pointer. |
| 4941 | debugger = dbg.release(); |
| 4942 | InitReservedSlot(obj, JSSLOT_DEBUG_DEBUGGER, debugger, MemoryUse::Debugger); |
| 4943 | } |
| 4944 | |
| 4945 | // Add the initial debuggees, if any. |
| 4946 | for (unsigned i = 0; i < args.length(); i++) { |
| 4947 | JSObject& wrappedObj = |
| 4948 | args[i].toObject().as<ProxyObject>().private_().toObject(); |
| 4949 | Rooted<GlobalObject*> debuggee(cx, &wrappedObj.nonCCWGlobal()); |
| 4950 | if (!debugger->addDebuggeeGlobal(cx, debuggee)) { |
| 4951 | return false; |
| 4952 | } |
| 4953 | } |
| 4954 | |
| 4955 | args.rval().setObject(*obj); |
| 4956 | return true; |
| 4957 | } |
| 4958 | |
| 4959 | bool Debugger::addDebuggeeGlobal(JSContext* cx, Handle<GlobalObject*> global) { |
| 4960 | if (debuggees.has(global)) { |
| 4961 | return true; |
| 4962 | } |
| 4963 | |
| 4964 | // Callers should generally be unable to get a reference to a debugger- |
| 4965 | // invisible global in order to pass it to addDebuggee. But this is possible |
| 4966 | // with certain testing aides we expose in the shell, so just make addDebuggee |
| 4967 | // throw in that case. |
| 4968 | Realm* debuggeeRealm = global->realm(); |
| 4969 | if (debuggeeRealm->creationOptions().invisibleToDebugger()) { |
| 4970 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 4971 | JSMSG_DEBUG_CANT_DEBUG_GLOBAL); |
| 4972 | return false; |
| 4973 | } |
| 4974 | |
| 4975 | // Debugger and debuggee must be in different compartments. |
| 4976 | if (debuggeeRealm->compartment() == object->compartment()) { |
| 4977 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 4978 | JSMSG_DEBUG_SAME_COMPARTMENT); |
| 4979 | return false; |
| 4980 | } |
| 4981 | |
| 4982 | // Check for cycles. If global's realm is reachable from this Debugger |
| 4983 | // object's realm by following debuggee-to-debugger links, then adding |
| 4984 | // global would create a cycle. (Typically nobody is debugging the |
| 4985 | // debugger, in which case we zip through this code without looping.) |
| 4986 | Vector<Realm*> visited(cx); |
| 4987 | if (!visited.append(object->realm())) { |
| 4988 | return false; |
| 4989 | } |
| 4990 | for (size_t i = 0; i < visited.length(); i++) { |
| 4991 | Realm* realm = visited[i]; |
| 4992 | if (realm == debuggeeRealm) { |
| 4993 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_DEBUG_LOOP); |
| 4994 | return false; |
| 4995 | } |
| 4996 | |
| 4997 | // Find all realms containing debuggers debugging realm's global object. |
| 4998 | // Add those realms to visited. |
| 4999 | if (realm->isDebuggee()) { |
| 5000 | JS::AutoAssertNoGC nogc; |
| 5001 | for (Realm::DebuggerVectorEntry& entry : realm->getDebuggers(nogc)) { |
| 5002 | Realm* next = entry.dbg->object->realm(); |
| 5003 | if (std::find(visited.begin(), visited.end(), next) == visited.end()) { |
| 5004 | if (!visited.append(next)) { |
| 5005 | return false; |
| 5006 | } |
| 5007 | } |
| 5008 | } |
| 5009 | } |
| 5010 | } |
| 5011 | |
| 5012 | // For global to become this js::Debugger's debuggee: |
| 5013 | // |
| 5014 | // 1. this js::Debugger must be in global->getDebuggers(), |
| 5015 | // 2. global must be in this->debuggees, |
| 5016 | // 3. the debuggee's zone must be in this->debuggeeZones, |
| 5017 | // 4. if we are tracking allocations, the SavedStacksMetadataBuilder must be |
| 5018 | // installed for this realm, and |
| 5019 | // 5. Realm::isDebuggee()'s bit must be set. |
| 5020 | // |
| 5021 | // All five indications must be kept consistent. |
| 5022 | |
| 5023 | AutoRealm ar(cx, global); |
| 5024 | Zone* zone = global->zone(); |
| 5025 | |
| 5026 | RootedObject debuggeeLink(cx, getDebuggeeLink()); |
| 5027 | if (!cx->compartment()->wrap(cx, &debuggeeLink)) { |
| 5028 | return false; |
| 5029 | } |
| 5030 | |
| 5031 | // (1) |
| 5032 | JS::AutoAssertNoGC nogc; |
| 5033 | auto& globalDebuggers = global->getDebuggers(nogc); |
| 5034 | if (!globalDebuggers.append(Realm::DebuggerVectorEntry(this, debuggeeLink))) { |
| 5035 | ReportOutOfMemory(cx); |
| 5036 | return false; |
| 5037 | } |
| 5038 | auto globalDebuggersGuard = MakeScopeExit([&] { globalDebuggers.popBack(); }); |
| 5039 | |
| 5040 | // (2) |
| 5041 | if (!debuggees.put(global)) { |
| 5042 | ReportOutOfMemory(cx); |
| 5043 | return false; |
| 5044 | } |
| 5045 | auto debuggeesGuard = MakeScopeExit([&] { debuggees.remove(global); }); |
| 5046 | |
| 5047 | bool addingZoneRelation = !debuggeeZones.has(zone); |
| 5048 | |
| 5049 | // (3) |
| 5050 | if (addingZoneRelation && !debuggeeZones.put(zone)) { |
| 5051 | ReportOutOfMemory(cx); |
| 5052 | return false; |
| 5053 | } |
| 5054 | auto debuggeeZonesGuard = MakeScopeExit([&] { |
| 5055 | if (addingZoneRelation) { |
| 5056 | debuggeeZones.remove(zone); |
| 5057 | } |
| 5058 | }); |
| 5059 | |
| 5060 | // (4) |
| 5061 | if (trackingAllocationSites && |
| 5062 | !Debugger::addAllocationsTracking(cx, global)) { |
| 5063 | return false; |
| 5064 | } |
| 5065 | |
| 5066 | auto allocationsTrackingGuard = MakeScopeExit([&] { |
| 5067 | if (trackingAllocationSites) { |
| 5068 | Debugger::removeAllocationsTracking(*global); |
| 5069 | } |
| 5070 | }); |
| 5071 | |
| 5072 | // (5) |
| 5073 | AutoRestoreRealmDebugMode debugModeGuard(debuggeeRealm); |
| 5074 | debuggeeRealm->setIsDebuggee(); |
| 5075 | debuggeeRealm->updateDebuggerObservesAsmJS(); |
| 5076 | debuggeeRealm->updateDebuggerObservesWasm(); |
| 5077 | debuggeeRealm->updateDebuggerObservesCoverage(); |
| 5078 | if (observesAllExecution() && |
| 5079 | !ensureExecutionObservabilityOfRealm(cx, debuggeeRealm)) { |
| 5080 | return false; |
| 5081 | } |
| 5082 | |
| 5083 | globalDebuggersGuard.release(); |
| 5084 | debuggeesGuard.release(); |
| 5085 | debuggeeZonesGuard.release(); |
| 5086 | allocationsTrackingGuard.release(); |
| 5087 | debugModeGuard.release(); |
| 5088 | return true; |
| 5089 | } |
| 5090 | |
| 5091 | void Debugger::recomputeDebuggeeZoneSet() { |
| 5092 | AutoEnterOOMUnsafeRegion oomUnsafe; |
| 5093 | debuggeeZones.clear(); |
| 5094 | for (auto range = debuggees.all(); !range.empty(); range.popFront()) { |
| 5095 | if (!debuggeeZones.put(range.front().unbarrieredGet()->zone())) { |
| 5096 | oomUnsafe.crash("Debugger::removeDebuggeeGlobal"); |
| 5097 | } |
| 5098 | } |
| 5099 | } |
| 5100 | |
| 5101 | template <typename T, typename AP> |
| 5102 | static T* findDebuggerInVector(Debugger* dbg, Vector<T, 0, AP>* vec) { |
| 5103 | T* p; |
| 5104 | for (p = vec->begin(); p != vec->end(); p++) { |
| 5105 | if (p->dbg == dbg) { |
| 5106 | break; |
| 5107 | } |
| 5108 | } |
| 5109 | MOZ_ASSERT(p != vec->end())do { static_assert( mozilla::detail::AssertionConditionType< decltype(p != vec->end())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(p != vec->end()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("p != vec->end()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5109); AnnotateMozCrashReason("MOZ_ASSERT" "(" "p != vec->end()" ")"); do { *((volatile int*)__null) = 5109; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5110 | return p; |
| 5111 | } |
| 5112 | |
| 5113 | void Debugger::removeDebuggeeGlobal(JS::GCContext* gcx, GlobalObject* global, |
| 5114 | WeakGlobalObjectSet::Enum* debugEnum, |
| 5115 | FromSweep fromSweep) { |
| 5116 | // The caller might have found global by enumerating this->debuggees; if |
| 5117 | // so, use HashSet::Enum::removeFront rather than HashSet::remove below, |
| 5118 | // to avoid invalidating the live enumerator. |
| 5119 | MOZ_ASSERT(debuggees.has(global))do { static_assert( mozilla::detail::AssertionConditionType< decltype(debuggees.has(global))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(debuggees.has(global)))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("debuggees.has(global)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5119); AnnotateMozCrashReason("MOZ_ASSERT" "(" "debuggees.has(global)" ")"); do { *((volatile int*)__null) = 5119; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5120 | MOZ_ASSERT(debuggeeZones.has(global->zone()))do { static_assert( mozilla::detail::AssertionConditionType< decltype(debuggeeZones.has(global->zone()))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(debuggeeZones.has(global-> zone())))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("debuggeeZones.has(global->zone())", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5120); AnnotateMozCrashReason("MOZ_ASSERT" "(" "debuggeeZones.has(global->zone())" ")"); do { *((volatile int*)__null) = 5120; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5121 | MOZ_ASSERT_IF(debugEnum, debugEnum->front().unbarrieredGet() == global)do { if (debugEnum) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(debugEnum->front().unbarrieredGet() == global )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(debugEnum->front().unbarrieredGet() == global))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("debugEnum->front().unbarrieredGet() == global" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5121); AnnotateMozCrashReason("MOZ_ASSERT" "(" "debugEnum->front().unbarrieredGet() == global" ")"); do { *((volatile int*)__null) = 5121; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 5122 | |
| 5123 | // Clear this global's generators from generatorFrames as well. |
| 5124 | // |
| 5125 | // This method can be called either from script (dbg.removeDebuggee) or during |
| 5126 | // GC sweeping, because the Debugger, debuggee global, or both are being GC'd. |
| 5127 | // |
| 5128 | // When called from script, it's okay to iterate over generatorFrames and |
| 5129 | // touch its keys and values (even when an incremental GC is in progress). |
| 5130 | // When called from GC, it's not okay; the keys and values may be dying. But |
| 5131 | // in that case, we can actually just skip the loop entirely! If the Debugger |
| 5132 | // is going away, it doesn't care about the state of its generatorFrames |
| 5133 | // table, and the Debugger.Frame finalizer will fix up the generator observer |
| 5134 | // counts. |
| 5135 | if (fromSweep == FromSweep::No) { |
| 5136 | for (GeneratorWeakMap::Enum e(generatorFrames); !e.empty(); e.popFront()) { |
| 5137 | AbstractGeneratorObject& genObj = *e.front().key(); |
| 5138 | if (&genObj.global() == global) { |
| 5139 | terminateDebuggerFrame(gcx, this, e.front().value(), NullFramePtr(), |
| 5140 | nullptr, &e); |
| 5141 | } |
| 5142 | } |
| 5143 | } |
| 5144 | |
| 5145 | for (FrameMap::Enum e(frames); !e.empty(); e.popFront()) { |
| 5146 | AbstractFramePtr frame = e.front().key(); |
| 5147 | if (frame.hasGlobal(global)) { |
| 5148 | terminateDebuggerFrame(gcx, this, e.front().value(), frame, &e); |
| 5149 | } |
| 5150 | } |
| 5151 | |
| 5152 | JS::AutoAssertNoGC nogc; |
| 5153 | auto& globalDebuggersVector = global->getDebuggers(nogc); |
| 5154 | |
| 5155 | // The relation must be removed from up to three places: |
| 5156 | // globalDebuggersVector and debuggees for sure, and possibly the |
| 5157 | // compartment's debuggee set. |
| 5158 | // |
| 5159 | // The debuggee zone set is recomputed on demand. This avoids refcounting |
| 5160 | // and in practice we have relatively few debuggees that tend to all be in |
| 5161 | // the same zone. If after recomputing the debuggee zone set, this global's |
| 5162 | // zone is not in the set, then we must remove ourselves from the zone's |
| 5163 | // vector of observing debuggers. |
| 5164 | globalDebuggersVector.erase( |
| 5165 | findDebuggerInVector(this, &globalDebuggersVector)); |
| 5166 | |
| 5167 | if (debugEnum) { |
| 5168 | debugEnum->removeFront(); |
| 5169 | } else { |
| 5170 | debuggees.remove(global); |
| 5171 | } |
| 5172 | |
| 5173 | recomputeDebuggeeZoneSet(); |
| 5174 | |
| 5175 | // Remove all breakpoints for the debuggee. |
| 5176 | Breakpoint* nextbp; |
| 5177 | for (Breakpoint* bp = firstBreakpoint(); bp; bp = nextbp) { |
| 5178 | nextbp = bp->nextInDebugger(); |
| 5179 | |
| 5180 | if (bp->site->realm() == global->realm()) { |
| 5181 | bp->remove(gcx); |
| 5182 | } |
| 5183 | } |
| 5184 | MOZ_ASSERT_IF(debuggees.empty(), !firstBreakpoint())do { if (debuggees.empty()) { do { static_assert( mozilla::detail ::AssertionConditionType<decltype(!firstBreakpoint())>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!firstBreakpoint()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!firstBreakpoint()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5184); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!firstBreakpoint()" ")"); do { *((volatile int*)__null) = 5184; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 5185 | |
| 5186 | // If we are tracking allocation sites, we need to remove the object |
| 5187 | // metadata callback from this global's realm. |
| 5188 | if (trackingAllocationSites) { |
| 5189 | Debugger::removeAllocationsTracking(*global); |
| 5190 | } |
| 5191 | |
| 5192 | if (!global->realm()->hasDebuggers() && |
| 5193 | !global->realm()->isTracingExecution()) { |
| 5194 | global->realm()->unsetIsDebuggee(); |
| 5195 | } else { |
| 5196 | global->realm()->updateDebuggerObservesAllExecution(); |
| 5197 | global->realm()->updateDebuggerObservesAsmJS(); |
| 5198 | global->realm()->updateDebuggerObservesWasm(); |
| 5199 | global->realm()->updateDebuggerObservesCoverage(); |
| 5200 | } |
| 5201 | } |
| 5202 | |
| 5203 | class MOZ_STACK_CLASS Debugger::QueryBase { |
| 5204 | protected: |
| 5205 | QueryBase(JSContext* cx, Debugger* dbg) |
| 5206 | : cx(cx), |
| 5207 | debugger(dbg), |
| 5208 | iterMarker(&cx->runtime()->gc), |
| 5209 | realms(cx->zone()) {} |
| 5210 | |
| 5211 | // The context in which we should do our work. |
| 5212 | JSContext* cx; |
| 5213 | |
| 5214 | // The debugger for which we conduct queries. |
| 5215 | Debugger* debugger; |
| 5216 | |
| 5217 | // Require the set of realms to stay fixed while the query is alive. |
| 5218 | gc::AutoEnterIteration iterMarker; |
| 5219 | |
| 5220 | using RealmSet = HashSet<Realm*, DefaultHasher<Realm*>, ZoneAllocPolicy>; |
| 5221 | |
| 5222 | // A script must be in one of these realms to match the query. |
| 5223 | RealmSet realms; |
| 5224 | |
| 5225 | // Indicates whether OOM has occurred while matching. |
| 5226 | bool oom = false; |
| 5227 | |
| 5228 | bool addRealm(Realm* realm) { return realms.put(realm); } |
| 5229 | |
| 5230 | // Arrange for this query to match only scripts that run in |global|. |
| 5231 | bool matchSingleGlobal(GlobalObject* global) { |
| 5232 | MOZ_ASSERT(realms.count() == 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype(realms.count() == 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(realms.count() == 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("realms.count() == 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5232); AnnotateMozCrashReason("MOZ_ASSERT" "(" "realms.count() == 0" ")"); do { *((volatile int*)__null) = 5232; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5233 | if (!addRealm(global->realm())) { |
| 5234 | ReportOutOfMemory(cx); |
| 5235 | return false; |
| 5236 | } |
| 5237 | return true; |
| 5238 | } |
| 5239 | |
| 5240 | // Arrange for this ScriptQuery to match all scripts running in debuggee |
| 5241 | // globals. |
| 5242 | bool matchAllDebuggeeGlobals() { |
| 5243 | MOZ_ASSERT(realms.count() == 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype(realms.count() == 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(realms.count() == 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("realms.count() == 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5243); AnnotateMozCrashReason("MOZ_ASSERT" "(" "realms.count() == 0" ")"); do { *((volatile int*)__null) = 5243; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5244 | // Build our realm set from the debugger's set of debuggee globals. |
| 5245 | for (WeakGlobalObjectSet::Range r = debugger->debuggees.all(); !r.empty(); |
| 5246 | r.popFront()) { |
| 5247 | if (!addRealm(r.front()->realm())) { |
| 5248 | ReportOutOfMemory(cx); |
| 5249 | return false; |
| 5250 | } |
| 5251 | } |
| 5252 | return true; |
| 5253 | } |
| 5254 | }; |
| 5255 | |
| 5256 | /* |
| 5257 | * A class for parsing 'findScripts' query arguments and searching for |
| 5258 | * scripts that match the criteria they represent. |
| 5259 | */ |
| 5260 | class MOZ_STACK_CLASS Debugger::ScriptQuery : public Debugger::QueryBase { |
| 5261 | public: |
| 5262 | /* Construct a ScriptQuery to use matching scripts for |dbg|. */ |
| 5263 | ScriptQuery(JSContext* cx, Debugger* dbg) |
| 5264 | : QueryBase(cx, dbg), |
| 5265 | url(cx), |
| 5266 | displayURLString(cx), |
| 5267 | source(cx, AsVariant(static_cast<ScriptSourceObject*>(nullptr))), |
| 5268 | scriptVector(cx, BaseScriptVector(cx)), |
| 5269 | partialMatchVector(cx, BaseScriptVector(cx)), |
| 5270 | wasmInstanceVector(cx, WasmInstanceObjectVector(cx)) {} |
| 5271 | |
| 5272 | /* |
| 5273 | * Parse the query object |query|, and prepare to match only the scripts |
| 5274 | * it specifies. |
| 5275 | */ |
| 5276 | bool parseQuery(HandleObject query) { |
| 5277 | // Check for a 'global' property, which limits the results to those |
| 5278 | // scripts scoped to a particular global object. |
| 5279 | RootedValue global(cx); |
| 5280 | if (!GetProperty(cx, query, query, cx->names().global, &global)) { |
| 5281 | return false; |
| 5282 | } |
| 5283 | if (global.isUndefined()) { |
| 5284 | if (!matchAllDebuggeeGlobals()) { |
| 5285 | return false; |
| 5286 | } |
| 5287 | } else { |
| 5288 | GlobalObject* globalObject = debugger->unwrapDebuggeeArgument(cx, global); |
| 5289 | if (!globalObject) { |
| 5290 | return false; |
| 5291 | } |
| 5292 | |
| 5293 | // If the given global isn't a debuggee, just leave the set of |
| 5294 | // acceptable globals empty; we'll return no scripts. |
| 5295 | if (debugger->debuggees.has(globalObject)) { |
| 5296 | if (!matchSingleGlobal(globalObject)) { |
| 5297 | return false; |
| 5298 | } |
| 5299 | } |
| 5300 | } |
| 5301 | |
| 5302 | // Check for a 'url' property. |
| 5303 | if (!GetProperty(cx, query, query, cx->names().url, &url)) { |
| 5304 | return false; |
| 5305 | } |
| 5306 | if (!url.isUndefined() && !url.isString()) { |
| 5307 | JS_ReportErrorNumberASCII( |
| 5308 | cx, GetErrorMessage, nullptr, JSMSG_UNEXPECTED_TYPE, |
| 5309 | "query object's 'url' property", "neither undefined nor a string"); |
| 5310 | return false; |
| 5311 | } |
| 5312 | |
| 5313 | // Check for a 'source' property |
| 5314 | RootedValue debuggerSource(cx); |
| 5315 | if (!GetProperty(cx, query, query, cx->names().source, &debuggerSource)) { |
| 5316 | return false; |
| 5317 | } |
| 5318 | if (!debuggerSource.isUndefined()) { |
| 5319 | if (!debuggerSource.isObject() || |
| 5320 | !debuggerSource.toObject().is<DebuggerSource>()) { |
| 5321 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 5322 | JSMSG_UNEXPECTED_TYPE, |
| 5323 | "query object's 'source' property", |
| 5324 | "not undefined nor a Debugger.Source object"); |
| 5325 | return false; |
| 5326 | } |
| 5327 | |
| 5328 | DebuggerSource& debuggerSourceObj = |
| 5329 | debuggerSource.toObject().as<DebuggerSource>(); |
| 5330 | |
| 5331 | // If it does have an owner, it should match the Debugger we're |
| 5332 | // calling findScripts on. It would work fine even if it didn't, |
| 5333 | // but mixing Debugger.Sources is probably a sign of confusion. |
| 5334 | if (debuggerSourceObj.owner() != debugger) { |
| 5335 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 5336 | JSMSG_DEBUG_WRONG_OWNER, "Debugger.Source"); |
| 5337 | return false; |
| 5338 | } |
| 5339 | |
| 5340 | hasSource = true; |
| 5341 | source = debuggerSourceObj.getReferent(); |
| 5342 | } |
| 5343 | |
| 5344 | // Check for a 'displayURL' property. |
| 5345 | RootedValue displayURL(cx); |
| 5346 | if (!GetProperty(cx, query, query, cx->names().displayURL, &displayURL)) { |
| 5347 | return false; |
| 5348 | } |
| 5349 | if (!displayURL.isUndefined() && !displayURL.isString()) { |
| 5350 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 5351 | JSMSG_UNEXPECTED_TYPE, |
| 5352 | "query object's 'displayURL' property", |
| 5353 | "neither undefined nor a string"); |
| 5354 | return false; |
| 5355 | } |
| 5356 | |
| 5357 | if (displayURL.isString()) { |
| 5358 | displayURLString = displayURL.toString()->ensureLinear(cx); |
| 5359 | if (!displayURLString) { |
| 5360 | return false; |
| 5361 | } |
| 5362 | } |
| 5363 | |
| 5364 | // Check for a 'line' property. |
| 5365 | RootedValue lineProperty(cx); |
| 5366 | if (!GetProperty(cx, query, query, cx->names().line, &lineProperty)) { |
| 5367 | return false; |
| 5368 | } |
| 5369 | if (lineProperty.isUndefined()) { |
| 5370 | hasLine = false; |
| 5371 | } else if (lineProperty.isNumber()) { |
| 5372 | if (displayURL.isUndefined() && url.isUndefined() && !hasSource) { |
| 5373 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 5374 | JSMSG_QUERY_LINE_WITHOUT_URL, |
| 5375 | "'line' property"); |
| 5376 | return false; |
| 5377 | } |
| 5378 | if (!parsePositiveInteger(lineProperty, line, JSMSG_DEBUG_BAD_LINE)) { |
| 5379 | return false; |
| 5380 | } |
| 5381 | hasLine = true; |
| 5382 | lineEnd = line; |
| 5383 | } else { |
| 5384 | JS_ReportErrorNumberASCII( |
| 5385 | cx, GetErrorMessage, nullptr, JSMSG_UNEXPECTED_TYPE, |
| 5386 | "query object's 'line' property", "neither undefined nor an integer"); |
| 5387 | return false; |
| 5388 | } |
| 5389 | |
| 5390 | // Check for a 'start' property. |
| 5391 | RootedValue startProperty(cx); |
| 5392 | if (!GetProperty(cx, query, query, cx->names().start, &startProperty)) { |
| 5393 | return false; |
| 5394 | } |
| 5395 | if (startProperty.isObject()) { |
| 5396 | Rooted<JSObject*> startObject(cx, &startProperty.toObject()); |
| 5397 | if (!parseLineColumnObject(startObject, "start", line, columnStart)) { |
| 5398 | return false; |
| 5399 | } |
| 5400 | hasLine = true; |
| 5401 | } else if (!startProperty.isUndefined()) { |
| 5402 | JS_ReportErrorNumberASCII( |
| 5403 | cx, GetErrorMessage, nullptr, JSMSG_UNEXPECTED_TYPE, |
| 5404 | "query object's 'start' property", "neither undefined nor an object"); |
| 5405 | return false; |
| 5406 | } |
| 5407 | |
| 5408 | // Check for a 'end' property. |
| 5409 | RootedValue endProperty(cx); |
| 5410 | if (!GetProperty(cx, query, query, cx->names().end, &endProperty)) { |
| 5411 | return false; |
| 5412 | } |
| 5413 | if (endProperty.isObject()) { |
| 5414 | Rooted<JSObject*> endObject(cx, &endProperty.toObject()); |
| 5415 | if (!parseLineColumnObject(endObject, "end", lineEnd, columnEnd)) { |
| 5416 | return false; |
| 5417 | } |
| 5418 | } else if (!endProperty.isUndefined()) { |
| 5419 | JS_ReportErrorNumberASCII( |
| 5420 | cx, GetErrorMessage, nullptr, JSMSG_UNEXPECTED_TYPE, |
| 5421 | "query object's 'end' property", "neither undefined nor an object"); |
| 5422 | return false; |
| 5423 | } |
| 5424 | |
| 5425 | if (startProperty.isUndefined() ^ endProperty.isUndefined()) { |
| 5426 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 5427 | JSMSG_QUERY_USE_START_AND_END_TOGETHER); |
| 5428 | return false; |
| 5429 | } |
| 5430 | |
| 5431 | if (!startProperty.isUndefined()) { |
| 5432 | // endProperty is also not undefined here |
| 5433 | if (displayURL.isUndefined() && url.isUndefined() && !hasSource) { |
| 5434 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 5435 | JSMSG_QUERY_LINE_WITHOUT_URL, |
| 5436 | "'start' and 'end' properties"); |
| 5437 | return false; |
| 5438 | } |
| 5439 | } |
| 5440 | |
| 5441 | if (hasLine && lineEnd < line) { |
| 5442 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 5443 | JSMSG_QUERY_START_LINE_IS_AFTER_END); |
| 5444 | return false; |
| 5445 | } |
| 5446 | |
| 5447 | // Check for an 'innermost' property. |
| 5448 | PropertyName* innermostName = cx->names().innermost; |
| 5449 | RootedValue innermostProperty(cx); |
| 5450 | if (!GetProperty(cx, query, query, innermostName, &innermostProperty)) { |
| 5451 | return false; |
| 5452 | } |
| 5453 | innermost = ToBoolean(innermostProperty); |
| 5454 | if (innermost) { |
| 5455 | // Technically, we need only check hasLine, but this is clearer. |
| 5456 | if ((displayURL.isUndefined() && url.isUndefined() && !hasSource) || |
| 5457 | !hasLine) { |
| 5458 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 5459 | JSMSG_QUERY_INNERMOST_WITHOUT_LINE_URL); |
| 5460 | return false; |
| 5461 | } |
| 5462 | } |
| 5463 | |
| 5464 | return true; |
| 5465 | } |
| 5466 | |
| 5467 | /* Set up this ScriptQuery appropriately for a missing query argument. */ |
| 5468 | bool omittedQuery() { |
| 5469 | url.setUndefined(); |
| 5470 | hasLine = false; |
| 5471 | innermost = false; |
| 5472 | displayURLString = nullptr; |
| 5473 | return matchAllDebuggeeGlobals(); |
| 5474 | } |
| 5475 | |
| 5476 | /* |
| 5477 | * Search all relevant realms and the stack for scripts matching |
| 5478 | * this query, and append the matching scripts to |scriptVector|. |
| 5479 | */ |
| 5480 | bool findScripts() { |
| 5481 | if (!prepareQuery()) { |
| 5482 | return false; |
| 5483 | } |
| 5484 | |
| 5485 | Realm* singletonRealm = nullptr; |
| 5486 | if (realms.count() == 1) { |
| 5487 | singletonRealm = realms.all().front(); |
| 5488 | } |
| 5489 | |
| 5490 | // Search each realm for debuggee scripts. |
| 5491 | MOZ_ASSERT(scriptVector.empty())do { static_assert( mozilla::detail::AssertionConditionType< decltype(scriptVector.empty())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(scriptVector.empty()))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("scriptVector.empty()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5491); AnnotateMozCrashReason("MOZ_ASSERT" "(" "scriptVector.empty()" ")"); do { *((volatile int*)__null) = 5491; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5492 | MOZ_ASSERT(partialMatchVector.empty())do { static_assert( mozilla::detail::AssertionConditionType< decltype(partialMatchVector.empty())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(partialMatchVector.empty())) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("partialMatchVector.empty()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5492); AnnotateMozCrashReason("MOZ_ASSERT" "(" "partialMatchVector.empty()" ")"); do { *((volatile int*)__null) = 5492; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5493 | oom = false; |
| 5494 | IterateScripts(cx, singletonRealm, this, considerScript); |
| 5495 | if (oom) { |
| 5496 | ReportOutOfMemory(cx); |
| 5497 | return false; |
| 5498 | } |
| 5499 | |
| 5500 | // If we are filtering by line number, the lazy BaseScripts were not checked |
| 5501 | // yet since they do not implement `GetScriptLineExtent`. Instead we revisit |
| 5502 | // each result script and delazify its children and add any matching ones to |
| 5503 | // the results list. |
| 5504 | MOZ_ASSERT(hasLine || partialMatchVector.empty())do { static_assert( mozilla::detail::AssertionConditionType< decltype(hasLine || partialMatchVector.empty())>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(! !(hasLine || partialMatchVector.empty()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("hasLine || partialMatchVector.empty()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5504); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hasLine || partialMatchVector.empty()" ")"); do { *((volatile int*)__null) = 5504; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5505 | Rooted<BaseScript*> script(cx); |
| 5506 | RootedFunction fun(cx); |
| 5507 | while (!partialMatchVector.empty()) { |
| 5508 | script = partialMatchVector.popCopy(); |
| 5509 | |
| 5510 | // As a performance optimization, we can skip scripts that are definitely |
| 5511 | // out-of-bounds for the target line. This was checked before adding to |
| 5512 | // the partialMatchVector, but the bound may have improved since then. |
| 5513 | if (script->extent().sourceEnd <= sourceOffsetLowerBound) { |
| 5514 | continue; |
| 5515 | } |
| 5516 | |
| 5517 | MOZ_ASSERT(script->isFunction())do { static_assert( mozilla::detail::AssertionConditionType< decltype(script->isFunction())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(script->isFunction()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("script->isFunction()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5517); AnnotateMozCrashReason("MOZ_ASSERT" "(" "script->isFunction()" ")"); do { *((volatile int*)__null) = 5517; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5518 | MOZ_ASSERT(script->isReadyForDelazification())do { static_assert( mozilla::detail::AssertionConditionType< decltype(script->isReadyForDelazification())>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(! !(script->isReadyForDelazification()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("script->isReadyForDelazification()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5518); AnnotateMozCrashReason("MOZ_ASSERT" "(" "script->isReadyForDelazification()" ")"); do { *((volatile int*)__null) = 5518; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5519 | |
| 5520 | fun = script->function(); |
| 5521 | |
| 5522 | // Ignore any delazification placeholder functions. These should not be |
| 5523 | // exposed to debugger in any way. |
| 5524 | if (fun->isGhost()) { |
| 5525 | continue; |
| 5526 | } |
| 5527 | |
| 5528 | // Delazify script. |
| 5529 | JSScript* compiledScript = GetOrCreateFunctionScript(cx, fun); |
| 5530 | if (!compiledScript) { |
| 5531 | return false; |
| 5532 | } |
| 5533 | |
| 5534 | // If target line isn't in script, we are done with it. |
| 5535 | if (!scriptIsLineMatch(compiledScript)) { |
| 5536 | continue; |
| 5537 | } |
| 5538 | |
| 5539 | // Add script to results now that we've completed checks. |
| 5540 | if (!scriptVector.append(compiledScript)) { |
| 5541 | return false; |
| 5542 | } |
| 5543 | |
| 5544 | // If script was a leaf we are done with it. This is an optional |
| 5545 | // optimization to avoid inspecting the `gcthings` list below. |
| 5546 | if (!script->hasInnerFunctions()) { |
| 5547 | continue; |
| 5548 | } |
| 5549 | |
| 5550 | // Now add inner scripts to `partialMatchVector` work list to determine if |
| 5551 | // they are matches. Note that out IterateScripts callback ignored them |
| 5552 | // already since they did not have a compiled parent at the time. |
| 5553 | for (JS::GCCellPtr thing : script->gcthings()) { |
| 5554 | if (!thing.is<JSObject>() || !thing.as<JSObject>().is<JSFunction>()) { |
| 5555 | continue; |
| 5556 | } |
| 5557 | JSFunction* fun = &thing.as<JSObject>().as<JSFunction>(); |
| 5558 | if (!fun->hasBaseScript()) { |
| 5559 | continue; |
| 5560 | } |
| 5561 | BaseScript* inner = fun->baseScript(); |
| 5562 | MOZ_ASSERT(inner)do { static_assert( mozilla::detail::AssertionConditionType< decltype(inner)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(inner))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("inner", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5562); AnnotateMozCrashReason("MOZ_ASSERT" "(" "inner" ")") ; do { *((volatile int*)__null) = 5562; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5563 | if (!inner) { |
| 5564 | // If the function doesn't have script, ignore it. |
| 5565 | continue; |
| 5566 | } |
| 5567 | |
| 5568 | if (!scriptIsPartialLineMatch(inner)) { |
| 5569 | continue; |
| 5570 | } |
| 5571 | |
| 5572 | // Add the matching inner script to the back of the results queue |
| 5573 | // where it will be processed recursively. |
| 5574 | if (!partialMatchVector.append(inner)) { |
| 5575 | return false; |
| 5576 | } |
| 5577 | } |
| 5578 | } |
| 5579 | |
| 5580 | // If this is an 'innermost' query, we want to filter the results again to |
| 5581 | // only return the innermost script for each realm. To do this we build a |
| 5582 | // hashmap to track innermost and then recreate the `scriptVector` with the |
| 5583 | // results that remain in the hashmap. |
| 5584 | if (innermost) { |
| 5585 | using RealmToScriptMap = |
| 5586 | GCHashMap<Realm*, BaseScript*, DefaultHasher<Realm*>>; |
| 5587 | |
| 5588 | Rooted<RealmToScriptMap> innermostForRealm(cx, cx); |
| 5589 | |
| 5590 | // Visit each candidate script and find innermost in each realm. |
| 5591 | for (BaseScript* script : scriptVector) { |
| 5592 | Realm* realm = script->realm(); |
| 5593 | RealmToScriptMap::AddPtr p = innermostForRealm.lookupForAdd(realm); |
| 5594 | if (p) { |
| 5595 | // Is our newly found script deeper than the last one we found? |
| 5596 | BaseScript* incumbent = p->value(); |
| 5597 | if (script->asJSScript()->innermostScope()->chainLength() > |
| 5598 | incumbent->asJSScript()->innermostScope()->chainLength()) { |
| 5599 | p->value() = script; |
| 5600 | } |
| 5601 | } else { |
| 5602 | // This is the first matching script we've encountered for this |
| 5603 | // realm, so it is thus the innermost such script. |
| 5604 | if (!innermostForRealm.add(p, realm, script)) { |
| 5605 | return false; |
| 5606 | } |
| 5607 | } |
| 5608 | } |
| 5609 | |
| 5610 | // Reset the results vector. |
| 5611 | scriptVector.clear(); |
| 5612 | |
| 5613 | // Re-add only the innermost scripts to the results. |
| 5614 | for (RealmToScriptMap::Range r = innermostForRealm.all(); !r.empty(); |
| 5615 | r.popFront()) { |
| 5616 | if (!scriptVector.append(r.front().value())) { |
| 5617 | return false; |
| 5618 | } |
| 5619 | } |
| 5620 | } |
| 5621 | |
| 5622 | // TODO: Until such time that wasm modules are real ES6 modules, |
| 5623 | // unconditionally consider all wasm toplevel instance scripts. |
| 5624 | for (WeakGlobalObjectSet::Range r = debugger->allDebuggees(); !r.empty(); |
| 5625 | r.popFront()) { |
| 5626 | for (wasm::Instance* instance : r.front()->realm()->wasm.instances()) { |
| 5627 | consider(instance->object()); |
| 5628 | if (oom) { |
| 5629 | ReportOutOfMemory(cx); |
| 5630 | return false; |
| 5631 | } |
| 5632 | } |
| 5633 | } |
| 5634 | |
| 5635 | return true; |
| 5636 | } |
| 5637 | |
| 5638 | Handle<BaseScriptVector> foundScripts() const { return scriptVector; } |
| 5639 | |
| 5640 | Handle<WasmInstanceObjectVector> foundWasmInstances() const { |
| 5641 | return wasmInstanceVector; |
| 5642 | } |
| 5643 | |
| 5644 | private: |
| 5645 | static const uint32_t LINE_CONSTRAINT_NOT_PROVIDED = 0; |
| 5646 | |
| 5647 | /* If this is a string, matching scripts have urls equal to it. */ |
| 5648 | RootedValue url; |
| 5649 | |
| 5650 | /* url as a C string. */ |
| 5651 | UniqueChars urlCString; |
| 5652 | |
| 5653 | /* If this is a string, matching scripts' sources have displayURLs equal to |
| 5654 | * it. */ |
| 5655 | Rooted<JSLinearString*> displayURLString; |
| 5656 | |
| 5657 | /* |
| 5658 | * If this is a source referent, matching scripts will have sources equal |
| 5659 | * to this instance. Ideally we'd use a Maybe here, but Maybe interacts |
| 5660 | * very badly with Rooted's LIFO invariant. |
| 5661 | */ |
| 5662 | bool hasSource = false; |
| 5663 | Rooted<DebuggerSourceReferent> source; |
| 5664 | |
| 5665 | /* True if the query contained a 'line' or 'start' property. */ |
| 5666 | bool hasLine = false; |
| 5667 | |
| 5668 | /* The start line of the target range, inclusive. A script's lines must |
| 5669 | * overlap the target line range or it will be filtered out by the query. */ |
| 5670 | uint32_t line = LINE_CONSTRAINT_NOT_PROVIDED; |
| 5671 | |
| 5672 | /* The end line of the target range, inclusive. A script's lines must overlap |
| 5673 | * the target line range or it will be filtered out by the query. */ |
| 5674 | uint32_t lineEnd = LINE_CONSTRAINT_NOT_PROVIDED; |
| 5675 | |
| 5676 | Maybe<JS::LimitedColumnNumberOneOrigin> columnStart; |
| 5677 | |
| 5678 | Maybe<JS::LimitedColumnNumberOneOrigin> columnEnd; |
| 5679 | |
| 5680 | // As a performance optimization (and to avoid delazifying as many scripts), |
| 5681 | // we would like to know the source offset of the target range start line. |
| 5682 | // |
| 5683 | // Since we do not have a simple way to compute this precisely, we instead |
| 5684 | // track a lower-bound of the offset value. As we collect SourceExtent |
| 5685 | // examples with (line,column) <-> sourceStart mappings, we can improve the |
| 5686 | // bound. The target range start line is within the range |
| 5687 | // [sourceOffsetLowerBound, Inf). |
| 5688 | // |
| 5689 | // NOTE: Using a SourceExtent for updating the bound happens independently of |
| 5690 | // if the script matches the target range start line or not in the end. |
| 5691 | mutable uint32_t sourceOffsetLowerBound = 0; |
| 5692 | |
| 5693 | /* True if the query has an 'innermost' property whose value is true. */ |
| 5694 | bool innermost = false; |
| 5695 | |
| 5696 | /* |
| 5697 | * Accumulate the scripts in an Rooted<BaseScriptVector> instead of creating |
| 5698 | * the JS array as we go, because we mustn't allocate JS objects or GC while |
| 5699 | * we use the CellIter. |
| 5700 | */ |
| 5701 | Rooted<BaseScriptVector> scriptVector; |
| 5702 | |
| 5703 | /* |
| 5704 | * While in the CellIter we may find BaseScripts that need to be compiled |
| 5705 | * before the query can be fully checked. Since we cannot compile while under |
| 5706 | * CellIter we accumulate them here instead. |
| 5707 | * |
| 5708 | * This occurs when matching line numbers since `GetScriptLineExtent` cannot |
| 5709 | * be computed without bytecode existing. |
| 5710 | */ |
| 5711 | Rooted<BaseScriptVector> partialMatchVector; |
| 5712 | |
| 5713 | /* |
| 5714 | * Like above, but for wasm modules. |
| 5715 | */ |
| 5716 | Rooted<WasmInstanceObjectVector> wasmInstanceVector; |
| 5717 | |
| 5718 | /* |
| 5719 | * Given that parseQuery or omittedQuery has been called, prepare to match |
| 5720 | * scripts. Set urlCString and displayURLChars as appropriate. |
| 5721 | */ |
| 5722 | bool prepareQuery() { |
| 5723 | // Compute urlCString and displayURLChars, if a url or displayURL was |
| 5724 | // given respectively. |
| 5725 | if (url.isString()) { |
| 5726 | Rooted<JSString*> str(cx, url.toString()); |
| 5727 | urlCString = JS_EncodeStringToUTF8(cx, str); |
| 5728 | if (!urlCString) { |
| 5729 | return false; |
| 5730 | } |
| 5731 | } |
| 5732 | |
| 5733 | return true; |
| 5734 | } |
| 5735 | |
| 5736 | template <size_t N> |
| 5737 | bool parseLineColumnObject( |
| 5738 | Handle<JSObject*> obj, const char (&propName)[N], uint32_t& lineOut, |
| 5739 | Maybe<JS::LimitedColumnNumberOneOrigin>& columnOut) { |
| 5740 | RootedValue lineProp(cx); |
| 5741 | if (!GetProperty(cx, obj, obj, cx->names().line, &lineProp)) { |
| 5742 | return false; |
| 5743 | } |
| 5744 | if (!lineProp.isNumber()) { |
| 5745 | static const char propMessageFormat[] = |
| 5746 | "query object's '%s.line' property"; |
| 5747 | char propMessage[N - 1 /* propName's terminating null */ |
| 5748 | + sizeof(propMessageFormat) - 2 /* '%s' is replaced */]; |
| 5749 | DebugOnly<size_t> checkLen = |
| 5750 | SprintfLiteral(propMessage, propMessageFormat, propName); |
| 5751 | MOZ_ASSERT(checkLen == sizeof(propMessage) - 1 /* terminating null */)do { static_assert( mozilla::detail::AssertionConditionType< decltype(checkLen == sizeof(propMessage) - 1)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(checkLen == sizeof(propMessage ) - 1))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("checkLen == sizeof(propMessage) - 1", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5751); AnnotateMozCrashReason("MOZ_ASSERT" "(" "checkLen == sizeof(propMessage) - 1" ")"); do { *((volatile int*)__null) = 5751; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5752 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 5753 | JSMSG_UNEXPECTED_TYPE, propMessage, |
| 5754 | "not a number"); |
| 5755 | return false; |
| 5756 | } |
| 5757 | if (!parsePositiveInteger(lineProp, lineOut, JSMSG_DEBUG_BAD_LINE)) { |
| 5758 | return false; |
| 5759 | } |
| 5760 | |
| 5761 | RootedValue columnProp(cx); |
| 5762 | if (!GetProperty(cx, obj, obj, cx->names().column, &columnProp)) { |
| 5763 | return false; |
| 5764 | } |
| 5765 | if (!columnProp.isUndefined()) { |
| 5766 | if (!columnProp.isNumber()) { |
| 5767 | static const char propMessageFormat[] = |
| 5768 | "query object's '%s.column' property"; |
| 5769 | char propMessage[N - 1 /* propName's terminating null */ |
| 5770 | + sizeof(propMessageFormat) - |
| 5771 | 2 /* '%s' is replaced */]; |
| 5772 | DebugOnly<size_t> checkLen = |
| 5773 | SprintfLiteral(propMessage, propMessageFormat, propName); |
| 5774 | MOZ_ASSERT(checkLen == sizeof(propMessage) - 1 /* terminating null */)do { static_assert( mozilla::detail::AssertionConditionType< decltype(checkLen == sizeof(propMessage) - 1)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(checkLen == sizeof(propMessage ) - 1))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("checkLen == sizeof(propMessage) - 1", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5774); AnnotateMozCrashReason("MOZ_ASSERT" "(" "checkLen == sizeof(propMessage) - 1" ")"); do { *((volatile int*)__null) = 5774; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5775 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 5776 | JSMSG_UNEXPECTED_TYPE, propMessage, |
| 5777 | "not a number"); |
| 5778 | return false; |
| 5779 | } |
| 5780 | uint32_t uintColumn = 0; |
| 5781 | if (!parsePositiveInteger(columnProp, uintColumn, |
| 5782 | JSMSG_BAD_COLUMN_NUMBER)) { |
| 5783 | return false; |
| 5784 | } |
| 5785 | if (uintColumn > JS::LimitedColumnNumberOneOrigin::Limit) { |
| 5786 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 5787 | JSMSG_BAD_COLUMN_NUMBER); |
| 5788 | return false; |
| 5789 | } |
| 5790 | columnOut.emplace(JS::LimitedColumnNumberOneOrigin(uintColumn)); |
| 5791 | } |
| 5792 | return true; |
| 5793 | } |
| 5794 | |
| 5795 | bool parsePositiveInteger(Handle<Value> numberProp, uint32_t& result, |
| 5796 | JSErrNum errorNumber) { |
| 5797 | double doubleVal = numberProp.toNumber(); |
| 5798 | uint32_t uintVal = (uint32_t)doubleVal; |
| 5799 | if (doubleVal <= 0 || uintVal != doubleVal) { |
| 5800 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, errorNumber); |
| 5801 | return false; |
| 5802 | } |
| 5803 | result = uintVal; |
| 5804 | return true; |
| 5805 | } |
| 5806 | |
| 5807 | void updateSourceOffsetLowerBound(const SourceExtent& extent) { |
| 5808 | // We trying to find the offset of (target-range-start-line, 0), so ignore |
| 5809 | // any scripts within the target range. |
| 5810 | MOZ_ASSERT(line != LINE_CONSTRAINT_NOT_PROVIDED &&do { static_assert( mozilla::detail::AssertionConditionType< decltype(line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5811); AnnotateMozCrashReason("MOZ_ASSERT" "(" "line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED" ")"); do { *((volatile int*)__null) = 5811; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 5811 | lineEnd != LINE_CONSTRAINT_NOT_PROVIDED)do { static_assert( mozilla::detail::AssertionConditionType< decltype(line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5811); AnnotateMozCrashReason("MOZ_ASSERT" "(" "line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED" ")"); do { *((volatile int*)__null) = 5811; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5812 | MOZ_ASSERT(extent.lineno <= lineEnd)do { static_assert( mozilla::detail::AssertionConditionType< decltype(extent.lineno <= lineEnd)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(extent.lineno <= lineEnd) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("extent.lineno <= lineEnd" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5812); AnnotateMozCrashReason("MOZ_ASSERT" "(" "extent.lineno <= lineEnd" ")"); do { *((volatile int*)__null) = 5812; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5813 | if (extent.lineno >= line) { |
| 5814 | return; |
| 5815 | } |
| 5816 | |
| 5817 | // The extent.sourceStart position is now definitely *before* the target |
| 5818 | // range start line, so update sourceOffsetLowerBound if extent.sourceStart |
| 5819 | // is a tighter bound. |
| 5820 | if (extent.sourceStart > sourceOffsetLowerBound) { |
| 5821 | sourceOffsetLowerBound = extent.sourceStart; |
| 5822 | } |
| 5823 | } |
| 5824 | |
| 5825 | // A partial match is a script that starts before the target range ends, but |
| 5826 | // may or may not end before the target range starts. We can also return false |
| 5827 | // if we can prove the script ends before the target range starts. |
| 5828 | bool scriptIsPartialLineMatch(BaseScript* script) { |
| 5829 | const SourceExtent& extent = script->extent(); |
| 5830 | |
| 5831 | // We only know for sure that the script is outside the target line range |
| 5832 | // if the start of script is after the target end line, because we don't |
| 5833 | // know how many lines the script has yet. |
| 5834 | MOZ_ASSERT(line != LINE_CONSTRAINT_NOT_PROVIDED &&do { static_assert( mozilla::detail::AssertionConditionType< decltype(line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5835); AnnotateMozCrashReason("MOZ_ASSERT" "(" "line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED" ")"); do { *((volatile int*)__null) = 5835; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 5835 | lineEnd != LINE_CONSTRAINT_NOT_PROVIDED)do { static_assert( mozilla::detail::AssertionConditionType< decltype(line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5835); AnnotateMozCrashReason("MOZ_ASSERT" "(" "line != LINE_CONSTRAINT_NOT_PROVIDED && lineEnd != LINE_CONSTRAINT_NOT_PROVIDED" ")"); do { *((volatile int*)__null) = 5835; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5836 | MOZ_ASSERT(line <= lineEnd)do { static_assert( mozilla::detail::AssertionConditionType< decltype(line <= lineEnd)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(line <= lineEnd))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("line <= lineEnd" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5836); AnnotateMozCrashReason("MOZ_ASSERT" "(" "line <= lineEnd" ")"); do { *((volatile int*)__null) = 5836; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5837 | if (extent.lineno > lineEnd) { |
| 5838 | return false; |
| 5839 | } |
| 5840 | if (columnEnd.isSome() && script->lineno() == lineEnd && |
| 5841 | script->column() > columnEnd.value()) { |
| 5842 | return false; |
| 5843 | } |
| 5844 | |
| 5845 | // Use the implicit (line, column) <-> sourceStart mapping from the |
| 5846 | // SourceExtent to update our bounds on possible matches. We call this |
| 5847 | // without knowing if the script is a match or not. |
| 5848 | updateSourceOffsetLowerBound(script->extent()); |
| 5849 | |
| 5850 | // As an optional performance optimization, we rule out any script that ends |
| 5851 | // before the lower-bound on where target range start line exists. |
| 5852 | return extent.sourceEnd > sourceOffsetLowerBound; |
| 5853 | } |
| 5854 | |
| 5855 | // True if any part of script source overlaps the target range. |
| 5856 | bool scriptIsLineMatch(JSScript* script) { |
| 5857 | MOZ_ASSERT(scriptIsPartialLineMatch(script))do { static_assert( mozilla::detail::AssertionConditionType< decltype(scriptIsPartialLineMatch(script))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(scriptIsPartialLineMatch(script )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("scriptIsPartialLineMatch(script)", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5857); AnnotateMozCrashReason("MOZ_ASSERT" "(" "scriptIsPartialLineMatch(script)" ")"); do { *((volatile int*)__null) = 5857; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 5858 | |
| 5859 | JS::LimitedColumnNumberOneOrigin scriptEndColumn; |
| 5860 | uint32_t lineCount = GetScriptLineExtent(script, &scriptEndColumn); |
| 5861 | if (columnStart.isSome() && script->lineno() + lineCount - 1 == line) { |
| 5862 | if (scriptEndColumn <= columnStart.value()) { |
| 5863 | return false; |
| 5864 | } |
| 5865 | } |
| 5866 | return (script->lineno() + lineCount > line); |
| 5867 | } |
| 5868 | |
| 5869 | static void considerScript(JSRuntime* rt, void* data, BaseScript* script, |
| 5870 | const JS::AutoRequireNoGC& nogc) { |
| 5871 | ScriptQuery* self = static_cast<ScriptQuery*>(data); |
| 5872 | self->consider(script, nogc); |
| 5873 | } |
| 5874 | |
| 5875 | template <typename T> |
| 5876 | [[nodiscard]] bool commonFilter(T script, const JS::AutoRequireNoGC& nogc) { |
| 5877 | if (urlCString) { |
| 5878 | bool gotFilename = false; |
| 5879 | if (script->filename() && |
| 5880 | strcmp(script->filename(), urlCString.get()) == 0) { |
| 5881 | gotFilename = true; |
| 5882 | } |
| 5883 | |
| 5884 | bool gotSourceURL = false; |
| 5885 | if (!gotFilename && script->scriptSource()->introducerFilename() && |
| 5886 | strcmp(script->scriptSource()->introducerFilename(), |
| 5887 | urlCString.get()) == 0) { |
| 5888 | gotSourceURL = true; |
| 5889 | } |
| 5890 | if (!gotFilename && !gotSourceURL) { |
| 5891 | return false; |
| 5892 | } |
| 5893 | } |
| 5894 | if (displayURLString) { |
| 5895 | if (!script->scriptSource() || !script->scriptSource()->hasDisplayURL()) { |
| 5896 | return false; |
| 5897 | } |
| 5898 | |
| 5899 | const char16_t* s = script->scriptSource()->displayURL(); |
| 5900 | if (CompareChars(s, js_strlen(s), displayURLString) != 0) { |
| 5901 | return false; |
| 5902 | } |
| 5903 | } |
| 5904 | if (hasSource && !(source.is<ScriptSourceObject*>() && |
| 5905 | source.as<ScriptSourceObject*>()->source() == |
| 5906 | script->scriptSource())) { |
| 5907 | return false; |
| 5908 | } |
| 5909 | return true; |
| 5910 | } |
| 5911 | |
| 5912 | /* |
| 5913 | * If |script| matches this query, append it to |scriptVector|. Set |oom| if |
| 5914 | * an out of memory condition occurred. |
| 5915 | */ |
| 5916 | void consider(BaseScript* script, const JS::AutoRequireNoGC& nogc) { |
| 5917 | if (oom || script->selfHosted()) { |
| 5918 | return; |
| 5919 | } |
| 5920 | |
| 5921 | Realm* realm = script->realm(); |
| 5922 | if (!realms.has(realm)) { |
| 5923 | return; |
| 5924 | } |
| 5925 | |
| 5926 | if (!commonFilter(script, nogc)) { |
| 5927 | return; |
| 5928 | } |
| 5929 | |
| 5930 | bool partial = false; |
| 5931 | |
| 5932 | if (hasLine) { |
| 5933 | if (!scriptIsPartialLineMatch(script)) { |
| 5934 | return; |
| 5935 | } |
| 5936 | |
| 5937 | if (script->hasBytecode()) { |
| 5938 | // Check if line is within script (or any of its inner scripts). |
| 5939 | if (!scriptIsLineMatch(script->asJSScript())) { |
| 5940 | return; |
| 5941 | } |
| 5942 | } else { |
| 5943 | // GetScriptLineExtent is not available on lazy scripts so instead to |
| 5944 | // the partial match list for be compiled and reprocessed later. We only |
| 5945 | // add scripts that are ready for delazification and they may in turn |
| 5946 | // process their inner functions. |
| 5947 | if (!script->isReadyForDelazification()) { |
| 5948 | return; |
| 5949 | } |
| 5950 | partial = true; |
| 5951 | } |
| 5952 | } |
| 5953 | |
| 5954 | // If innermost filter is required, we collect everything that matches the |
| 5955 | // line number and filter at the end of `findScripts`. |
| 5956 | MOZ_ASSERT_IF(innermost, hasLine)do { if (innermost) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(hasLine)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(hasLine))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("hasLine", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 5956); AnnotateMozCrashReason("MOZ_ASSERT" "(" "hasLine" ")" ); do { *((volatile int*)__null) = 5956; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 5957 | |
| 5958 | Rooted<BaseScriptVector>& vec = partial ? partialMatchVector : scriptVector; |
| 5959 | if (!vec.append(script)) { |
| 5960 | oom = true; |
| 5961 | } |
| 5962 | } |
| 5963 | |
| 5964 | /* |
| 5965 | * If |instanceObject| matches this query, append it to |wasmInstanceVector|. |
| 5966 | * Set |oom| if an out of memory condition occurred. |
| 5967 | */ |
| 5968 | void consider(WasmInstanceObject* instanceObject) { |
| 5969 | if (oom) { |
| 5970 | return; |
| 5971 | } |
| 5972 | |
| 5973 | if (hasSource && source != AsVariant(instanceObject)) { |
| 5974 | return; |
| 5975 | } |
| 5976 | |
| 5977 | if (!wasmInstanceVector.append(instanceObject)) { |
| 5978 | oom = true; |
| 5979 | } |
| 5980 | } |
| 5981 | }; |
| 5982 | |
| 5983 | bool Debugger::CallData::findScripts() { |
| 5984 | ScriptQuery query(cx, dbg); |
| 5985 | |
| 5986 | if (args.length() >= 1) { |
| 5987 | RootedObject queryObject(cx, RequireObject(cx, args[0])); |
| 5988 | if (!queryObject || !query.parseQuery(queryObject)) { |
| 5989 | return false; |
| 5990 | } |
| 5991 | } else { |
| 5992 | if (!query.omittedQuery()) { |
| 5993 | return false; |
| 5994 | } |
| 5995 | } |
| 5996 | |
| 5997 | if (!query.findScripts()) { |
| 5998 | return false; |
| 5999 | } |
| 6000 | |
| 6001 | Handle<BaseScriptVector> scripts(query.foundScripts()); |
| 6002 | Handle<WasmInstanceObjectVector> wasmInstances(query.foundWasmInstances()); |
| 6003 | |
| 6004 | size_t resultLength = scripts.length() + wasmInstances.length(); |
| 6005 | Rooted<ArrayObject*> result(cx, |
| 6006 | NewDenseFullyAllocatedArray(cx, resultLength)); |
| 6007 | if (!result) { |
| 6008 | return false; |
| 6009 | } |
| 6010 | |
| 6011 | result->ensureDenseInitializedLength(0, resultLength); |
| 6012 | |
| 6013 | for (size_t i = 0; i < scripts.length(); i++) { |
| 6014 | JSObject* scriptObject = dbg->wrapScript(cx, scripts[i]); |
| 6015 | if (!scriptObject) { |
| 6016 | return false; |
| 6017 | } |
| 6018 | result->setDenseElement(i, ObjectValue(*scriptObject)); |
| 6019 | } |
| 6020 | |
| 6021 | size_t wasmStart = scripts.length(); |
| 6022 | for (size_t i = 0; i < wasmInstances.length(); i++) { |
| 6023 | JSObject* scriptObject = dbg->wrapWasmScript(cx, wasmInstances[i]); |
| 6024 | if (!scriptObject) { |
| 6025 | return false; |
| 6026 | } |
| 6027 | result->setDenseElement(wasmStart + i, ObjectValue(*scriptObject)); |
| 6028 | } |
| 6029 | |
| 6030 | args.rval().setObject(*result); |
| 6031 | return true; |
| 6032 | } |
| 6033 | |
| 6034 | /* |
| 6035 | * A class for searching sources for 'findSources'. |
| 6036 | */ |
| 6037 | class MOZ_STACK_CLASS Debugger::SourceQuery : public Debugger::QueryBase { |
| 6038 | public: |
| 6039 | using SourceSet = JS::GCHashSet<JSObject*, js::StableCellHasher<JSObject*>, |
| 6040 | ZoneAllocPolicy>; |
| 6041 | |
| 6042 | SourceQuery(JSContext* cx, Debugger* dbg) |
| 6043 | : QueryBase(cx, dbg), sources(cx, SourceSet(cx->zone())) {} |
| 6044 | |
| 6045 | bool findSources() { |
| 6046 | if (!matchAllDebuggeeGlobals()) { |
| 6047 | return false; |
| 6048 | } |
| 6049 | |
| 6050 | Realm* singletonRealm = nullptr; |
| 6051 | if (realms.count() == 1) { |
| 6052 | singletonRealm = realms.all().front(); |
| 6053 | } |
| 6054 | |
| 6055 | // Search each realm for debuggee scripts. |
| 6056 | MOZ_ASSERT(sources.empty())do { static_assert( mozilla::detail::AssertionConditionType< decltype(sources.empty())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(sources.empty()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("sources.empty()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 6056); AnnotateMozCrashReason("MOZ_ASSERT" "(" "sources.empty()" ")"); do { *((volatile int*)__null) = 6056; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 6057 | oom = false; |
| 6058 | IterateScripts(cx, singletonRealm, this, considerScript); |
| 6059 | if (oom) { |
| 6060 | ReportOutOfMemory(cx); |
| 6061 | return false; |
| 6062 | } |
| 6063 | |
| 6064 | // TODO: Until such time that wasm modules are real ES6 modules, |
| 6065 | // unconditionally consider all wasm toplevel instance scripts. |
| 6066 | for (WeakGlobalObjectSet::Range r = debugger->allDebuggees(); !r.empty(); |
| 6067 | r.popFront()) { |
| 6068 | for (wasm::Instance* instance : r.front()->realm()->wasm.instances()) { |
| 6069 | consider(instance->object()); |
| 6070 | if (oom) { |
| 6071 | ReportOutOfMemory(cx); |
| 6072 | return false; |
| 6073 | } |
| 6074 | } |
| 6075 | } |
| 6076 | |
| 6077 | return true; |
| 6078 | } |
| 6079 | |
| 6080 | Handle<SourceSet> foundSources() const { return sources; } |
| 6081 | |
| 6082 | private: |
| 6083 | Rooted<SourceSet> sources; |
| 6084 | |
| 6085 | static void considerScript(JSRuntime* rt, void* data, BaseScript* script, |
| 6086 | const JS::AutoRequireNoGC& nogc) { |
| 6087 | SourceQuery* self = static_cast<SourceQuery*>(data); |
| 6088 | self->consider(script, nogc); |
| 6089 | } |
| 6090 | |
| 6091 | void consider(BaseScript* script, const JS::AutoRequireNoGC& nogc) { |
| 6092 | if (oom || script->selfHosted()) { |
| 6093 | return; |
| 6094 | } |
| 6095 | |
| 6096 | Realm* realm = script->realm(); |
| 6097 | if (!realms.has(realm)) { |
| 6098 | return; |
| 6099 | } |
| 6100 | |
| 6101 | ScriptSourceObject* source = script->sourceObject(); |
| 6102 | if (!sources.put(source)) { |
| 6103 | oom = true; |
| 6104 | } |
| 6105 | } |
| 6106 | |
| 6107 | void consider(WasmInstanceObject* instanceObject) { |
| 6108 | if (oom) { |
| 6109 | return; |
| 6110 | } |
| 6111 | |
| 6112 | if (!sources.put(instanceObject)) { |
| 6113 | oom = true; |
| 6114 | } |
| 6115 | } |
| 6116 | }; |
| 6117 | |
| 6118 | static inline DebuggerSourceReferent AsSourceReferent(JSObject* obj) { |
| 6119 | if (obj->is<ScriptSourceObject>()) { |
| 6120 | return AsVariant(&obj->as<ScriptSourceObject>()); |
| 6121 | } |
| 6122 | return AsVariant(&obj->as<WasmInstanceObject>()); |
| 6123 | } |
| 6124 | |
| 6125 | bool Debugger::CallData::findSources() { |
| 6126 | SourceQuery query(cx, dbg); |
| 6127 | if (!query.findSources()) { |
| 6128 | return false; |
| 6129 | } |
| 6130 | |
| 6131 | Handle<SourceQuery::SourceSet> sources(query.foundSources()); |
| 6132 | |
| 6133 | size_t resultLength = sources.count(); |
| 6134 | Rooted<ArrayObject*> result(cx, |
| 6135 | NewDenseFullyAllocatedArray(cx, resultLength)); |
| 6136 | if (!result) { |
| 6137 | return false; |
| 6138 | } |
| 6139 | |
| 6140 | result->ensureDenseInitializedLength(0, resultLength); |
| 6141 | |
| 6142 | size_t i = 0; |
| 6143 | for (auto iter = sources.get().iter(); !iter.done(); iter.next()) { |
| 6144 | Rooted<DebuggerSourceReferent> sourceReferent(cx, |
| 6145 | AsSourceReferent(iter.get())); |
| 6146 | RootedObject sourceObject(cx, dbg->wrapVariantReferent(cx, sourceReferent)); |
| 6147 | if (!sourceObject) { |
| 6148 | return false; |
| 6149 | } |
| 6150 | result->setDenseElement(i, ObjectValue(*sourceObject)); |
| 6151 | i++; |
| 6152 | } |
| 6153 | |
| 6154 | args.rval().setObject(*result); |
| 6155 | return true; |
| 6156 | } |
| 6157 | |
| 6158 | /* |
| 6159 | * A class for parsing 'findObjects' query arguments and searching for objects |
| 6160 | * that match the criteria they represent. |
| 6161 | */ |
| 6162 | class MOZ_STACK_CLASS Debugger::ObjectQuery { |
| 6163 | public: |
| 6164 | /* Construct an ObjectQuery to use matching scripts for |dbg|. */ |
| 6165 | ObjectQuery(JSContext* cx, Debugger* dbg) |
| 6166 | : objects(cx), |
| 6167 | cx(cx), |
| 6168 | dbg(dbg), |
| 6169 | queryType(QueryType::None), |
| 6170 | jsClassName(cx), |
| 6171 | unwrappedCtorOrProto(cx) {} |
| 6172 | |
| 6173 | /* The vector that we are accumulating results in. */ |
| 6174 | RootedObjectVector objects; |
| 6175 | |
| 6176 | /* The set of debuggee compartments. */ |
| 6177 | JS::CompartmentSet debuggeeCompartments; |
| 6178 | |
| 6179 | /* |
| 6180 | * Parse the query object |query|, and prepare to match only the objects it |
| 6181 | * specifies. |
| 6182 | */ |
| 6183 | bool parseQuery(HandleObject query) { |
| 6184 | // Check for the 'class' property |
| 6185 | RootedValue cls(cx); |
| 6186 | if (!GetProperty(cx, query, query, cx->names().class_, &cls)) { |
| 6187 | return false; |
| 6188 | } |
| 6189 | |
| 6190 | if (cls.isUndefined()) { |
| 6191 | return true; |
| 6192 | } |
| 6193 | |
| 6194 | if (cls.isString()) { |
| 6195 | JSLinearString* str = cls.toString()->ensureLinear(cx); |
| 6196 | if (!str) { |
| 6197 | return false; |
| 6198 | } |
| 6199 | if (!StringIsAscii(str)) { |
| 6200 | JS_ReportErrorNumberASCII( |
| 6201 | cx, GetErrorMessage, nullptr, JSMSG_UNEXPECTED_TYPE, |
| 6202 | "query object's 'class' property string", |
| 6203 | "not a string containing only ASCII characters"); |
| 6204 | return false; |
| 6205 | } |
| 6206 | jsClassName = cls; |
| 6207 | queryType = QueryType::JSClassName; |
| 6208 | return true; |
| 6209 | } |
| 6210 | |
| 6211 | if (cls.isObject()) { |
| 6212 | JS::Rooted<JSObject*> obj(cx, &cls.toObject()); |
| 6213 | obj = UncheckedUnwrap(obj); |
| 6214 | if (JS_IsDeadWrapper(obj)) { |
| 6215 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 6216 | JSMSG_DEAD_OBJECT); |
| 6217 | return false; |
| 6218 | } |
| 6219 | if (!obj->is<DebuggerObject>()) { |
| 6220 | JS_ReportErrorNumberASCII( |
| 6221 | cx, GetErrorMessage, nullptr, JSMSG_UNEXPECTED_TYPE, |
| 6222 | "query object's 'class' property object", "not Debugger.Object"); |
| 6223 | return false; |
| 6224 | } |
| 6225 | |
| 6226 | unwrappedCtorOrProto = obj->as<DebuggerObject>().referent(); |
| 6227 | unwrappedCtorOrProto = UncheckedUnwrap(unwrappedCtorOrProto); |
| 6228 | if (JS_IsDeadWrapper(unwrappedCtorOrProto)) { |
| 6229 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 6230 | JSMSG_DEAD_OBJECT); |
| 6231 | return false; |
| 6232 | } |
| 6233 | queryType = QueryType::CtorOrProto; |
| 6234 | return true; |
| 6235 | } |
| 6236 | |
| 6237 | JS_ReportErrorNumberASCII( |
| 6238 | cx, GetErrorMessage, nullptr, JSMSG_UNEXPECTED_TYPE, |
| 6239 | "query object's 'class' property", |
| 6240 | "none of JSClass name string, constructor/prototype debuggee object, " |
| 6241 | "or undefined"); |
| 6242 | return false; |
| 6243 | } |
| 6244 | |
| 6245 | /* Set up this ObjectQuery appropriately for a missing query argument. */ |
| 6246 | void omittedQuery() { |
| 6247 | jsClassName.setUndefined(); |
| 6248 | unwrappedCtorOrProto = nullptr; |
| 6249 | queryType = QueryType::None; |
| 6250 | } |
| 6251 | |
| 6252 | /* |
| 6253 | * Traverse the heap to find all relevant objects and add them to the |
| 6254 | * provided vector. |
| 6255 | */ |
| 6256 | bool findObjects() { |
| 6257 | if (!prepareQuery()) { |
| 6258 | return false; |
| 6259 | } |
| 6260 | |
| 6261 | for (WeakGlobalObjectSet::Range r = dbg->allDebuggees(); !r.empty(); |
| 6262 | r.popFront()) { |
| 6263 | if (!debuggeeCompartments.put(r.front()->compartment())) { |
| 6264 | ReportOutOfMemory(cx); |
| 6265 | return false; |
| 6266 | } |
| 6267 | } |
| 6268 | |
| 6269 | { |
| 6270 | // We can't tolerate the GC moving things around while we're |
| 6271 | // searching the heap. Check that nothing we do causes a GC. |
| 6272 | RootedObject dbgObj(cx, dbg->object); |
| 6273 | JS::ubi::RootList rootList(cx); |
| 6274 | auto [ok, nogc] = rootList.init(dbgObj); |
| 6275 | if (!ok) { |
| 6276 | ReportOutOfMemory(cx); |
| 6277 | return false; |
| 6278 | } |
| 6279 | |
| 6280 | Traversal traversal(cx, *this, nogc); |
| 6281 | traversal.wantNames = false; |
| 6282 | |
| 6283 | if (!traversal.addStart(JS::ubi::Node(&rootList)) || |
| 6284 | !traversal.traverse()) { |
| 6285 | ReportOutOfMemory(cx); |
| 6286 | return false; |
| 6287 | } |
| 6288 | return true; |
| 6289 | } |
| 6290 | } |
| 6291 | |
| 6292 | /* |
| 6293 | * |ubi::Node::BreadthFirst| interface. |
| 6294 | */ |
| 6295 | class NodeData {}; |
| 6296 | using Traversal = JS::ubi::BreadthFirst<ObjectQuery>; |
| 6297 | bool operator()(Traversal& traversal, JS::ubi::Node origin, |
| 6298 | const JS::ubi::Edge& edge, NodeData*, bool first) { |
| 6299 | if (!first) { |
| 6300 | return true; |
| 6301 | } |
| 6302 | |
| 6303 | JS::ubi::Node referent = edge.referent; |
| 6304 | |
| 6305 | // Only follow edges within our set of debuggee compartments; we don't |
| 6306 | // care about the heap's subgraphs outside of our debuggee compartments, |
| 6307 | // so we abandon the referent. Either (1) there is not a path from this |
| 6308 | // non-debuggee node back to a node in our debuggee compartments, and we |
| 6309 | // don't need to follow edges to or from this node, or (2) there does |
| 6310 | // exist some path from this non-debuggee node back to a node in our |
| 6311 | // debuggee compartments. However, if that were true, then the incoming |
| 6312 | // cross compartment edge back into a debuggee compartment is already |
| 6313 | // listed as an edge in the RootList we started traversal with, and |
| 6314 | // therefore we don't need to follow edges to or from this non-debuggee |
| 6315 | // node. |
| 6316 | JS::Compartment* comp = referent.compartment(); |
| 6317 | if (comp && !debuggeeCompartments.has(comp)) { |
| 6318 | traversal.abandonReferent(); |
| 6319 | return true; |
| 6320 | } |
| 6321 | |
| 6322 | // If the referent has an associated realm and it's not a debuggee |
| 6323 | // realm, skip it. Don't abandonReferent() here like above: realms |
| 6324 | // within a compartment can reference each other without going through |
| 6325 | // cross-compartment wrappers. |
| 6326 | Realm* realm = referent.realm(); |
| 6327 | if (realm && !dbg->isDebuggeeUnbarriered(realm)) { |
| 6328 | return true; |
| 6329 | } |
| 6330 | |
| 6331 | // If the referent is an object and matches our query's restrictions, |
| 6332 | // add it to the vector accumulating results. Skip objects that should |
| 6333 | // never be exposed to JS, like EnvironmentObjects and internal |
| 6334 | // functions. |
| 6335 | |
| 6336 | if (!referent.is<JSObject>() || referent.exposeToJS().isUndefined()) { |
| 6337 | return true; |
| 6338 | } |
| 6339 | |
| 6340 | JSObject* obj = referent.as<JSObject>(); |
| 6341 | |
| 6342 | switch (queryType) { |
| 6343 | case QueryType::None: |
| 6344 | break; |
| 6345 | case QueryType::JSClassName: { |
| 6346 | const char* objJSClassName = obj->getClass()->name; |
| 6347 | if (strcmp(objJSClassName, jsClassNameCString.get()) != 0) { |
| 6348 | return true; |
| 6349 | } |
| 6350 | break; |
| 6351 | } |
| 6352 | case QueryType::CtorOrProto: |
| 6353 | if (!hasConstructorOrPrototype(obj, unwrappedCtorOrProto, cx)) { |
| 6354 | return true; |
| 6355 | } |
| 6356 | break; |
| 6357 | } |
| 6358 | |
| 6359 | return objects.append(obj); |
| 6360 | } |
| 6361 | |
| 6362 | // Returns true if `obj` is confirmed to have `ctorOrProto` as its |
| 6363 | // constructor or prototype in the prototype chain. |
| 6364 | // |
| 6365 | // If it requires side-effect-ful operation for accessing the constructor or |
| 6366 | // prototype, this can return false even if `obj instanceof ctorOrProto` is |
| 6367 | // actually `true`. |
| 6368 | static bool hasConstructorOrPrototype(JSObject* obj, JSObject* ctorOrProto, |
| 6369 | JSContext* cx) { |
| 6370 | obj = UncheckedUnwrap(obj); |
| 6371 | |
| 6372 | while (true) { |
| 6373 | if (!obj->hasStaticPrototype()) { |
| 6374 | // Dynamic prototype cannot be matched without side-effect. |
| 6375 | break; |
| 6376 | } |
| 6377 | |
| 6378 | JSObject* proto = obj->staticPrototype(); |
| 6379 | if (!proto) { |
| 6380 | break; |
| 6381 | } |
| 6382 | proto = UncheckedUnwrap(proto); |
| 6383 | if (proto == ctorOrProto) { |
| 6384 | return true; |
| 6385 | } |
| 6386 | |
| 6387 | JS::Value ctorVal; |
| 6388 | bool result; |
| 6389 | { |
| 6390 | AutoRealm ar(cx, proto); |
| 6391 | result = GetPropertyPure(cx, proto, NameToId(cx->names().constructor), |
| 6392 | &ctorVal); |
| 6393 | } |
| 6394 | if (result && ctorVal.isObject()) { |
| 6395 | JSObject* ctor = &ctorVal.toObject(); |
| 6396 | ctor = UncheckedUnwrap(ctor); |
| 6397 | if (ctor == ctorOrProto) { |
| 6398 | return true; |
| 6399 | } |
| 6400 | } |
| 6401 | |
| 6402 | obj = proto; |
| 6403 | } |
| 6404 | |
| 6405 | return false; |
| 6406 | } |
| 6407 | |
| 6408 | private: |
| 6409 | /* The context in which we should do our work. */ |
| 6410 | JSContext* cx; |
| 6411 | |
| 6412 | /* The debugger for which we conduct queries. */ |
| 6413 | Debugger* dbg; |
| 6414 | |
| 6415 | enum class QueryType { |
| 6416 | /* No filtering. */ |
| 6417 | None, |
| 6418 | |
| 6419 | /* Match objects with given JSClass name. */ |
| 6420 | JSClassName, |
| 6421 | |
| 6422 | /* Match objects with given object as constructor or prototype. */ |
| 6423 | CtorOrProto, |
| 6424 | }; |
| 6425 | QueryType queryType; |
| 6426 | |
| 6427 | /* Matching objects will have a JSClass whose name is this property. */ |
| 6428 | RootedValue jsClassName; |
| 6429 | |
| 6430 | /* The jsClassName member, as a C string. */ |
| 6431 | UniqueChars jsClassNameCString; |
| 6432 | |
| 6433 | /* Matching objects will have given object as constructor or prototype. */ |
| 6434 | JS::Rooted<JSObject*> unwrappedCtorOrProto; |
| 6435 | |
| 6436 | /* |
| 6437 | * Given that either omittedQuery or parseQuery has been called, prepare the |
| 6438 | * query for matching objects. |
| 6439 | */ |
| 6440 | bool prepareQuery() { |
| 6441 | if (jsClassName.isString()) { |
| 6442 | jsClassNameCString = JS_EncodeStringToASCII(cx, jsClassName.toString()); |
| 6443 | if (!jsClassNameCString) { |
| 6444 | return false; |
| 6445 | } |
| 6446 | } |
| 6447 | |
| 6448 | return true; |
| 6449 | } |
| 6450 | }; |
| 6451 | |
| 6452 | bool Debugger::CallData::findObjects() { |
| 6453 | ObjectQuery query(cx, dbg); |
| 6454 | |
| 6455 | if (args.length() >= 1) { |
| 6456 | RootedObject queryObject(cx, RequireObject(cx, args[0])); |
| 6457 | if (!queryObject || !query.parseQuery(queryObject)) { |
| 6458 | return false; |
| 6459 | } |
| 6460 | } else { |
| 6461 | query.omittedQuery(); |
| 6462 | } |
| 6463 | |
| 6464 | if (!query.findObjects()) { |
| 6465 | return false; |
| 6466 | } |
| 6467 | |
| 6468 | // Returning internal objects (such as self-hosting intrinsics) to JS is not |
| 6469 | // fuzzing-safe. We still want to call parseQuery/findObjects when fuzzing so |
| 6470 | // just clear the Vector here. |
| 6471 | if (fuzzingSafe) { |
| 6472 | query.objects.clear(); |
| 6473 | } |
| 6474 | |
| 6475 | size_t length = query.objects.length(); |
| 6476 | Rooted<ArrayObject*> result(cx, NewDenseFullyAllocatedArray(cx, length)); |
| 6477 | if (!result) { |
| 6478 | return false; |
| 6479 | } |
| 6480 | |
| 6481 | result->ensureDenseInitializedLength(0, length); |
| 6482 | |
| 6483 | for (size_t i = 0; i < length; i++) { |
| 6484 | RootedValue debuggeeVal(cx, ObjectValue(*query.objects[i])); |
| 6485 | if (!dbg->wrapDebuggeeValue(cx, &debuggeeVal)) { |
| 6486 | return false; |
| 6487 | } |
| 6488 | result->setDenseElement(i, debuggeeVal); |
| 6489 | } |
| 6490 | |
| 6491 | args.rval().setObject(*result); |
| 6492 | return true; |
| 6493 | } |
| 6494 | |
| 6495 | bool Debugger::CallData::findAllGlobals() { |
| 6496 | RootedObjectVector globals(cx); |
| 6497 | |
| 6498 | { |
| 6499 | // Accumulate the list of globals before wrapping them, because |
| 6500 | // wrapping can GC and collect realms from under us, while iterating. |
| 6501 | JS::AutoCheckCannotGC nogc; |
| 6502 | |
| 6503 | for (RealmsIter r(cx->runtime()); !r.done(); r.next()) { |
| 6504 | if (r->creationOptions().invisibleToDebugger()) { |
| 6505 | continue; |
| 6506 | } |
| 6507 | |
| 6508 | if (!r->hasInitializedGlobal()) { |
| 6509 | continue; |
| 6510 | } |
| 6511 | |
| 6512 | if (JS::RealmBehaviorsRef(r).isNonLive()) { |
| 6513 | continue; |
| 6514 | } |
| 6515 | |
| 6516 | r->compartment()->gcState.scheduledForDestruction = false; |
| 6517 | |
| 6518 | GlobalObject* global = r->maybeGlobal(); |
| 6519 | |
| 6520 | // We pulled |global| out of nowhere, so it's possible that it was |
| 6521 | // marked gray by XPConnect. Since we're now exposing it to JS code, |
| 6522 | // we need to mark it black. |
| 6523 | JS::ExposeObjectToActiveJS(global); |
| 6524 | if (!globals.append(global)) { |
| 6525 | return false; |
| 6526 | } |
| 6527 | } |
| 6528 | } |
| 6529 | |
| 6530 | RootedObject result(cx, NewDenseEmptyArray(cx)); |
| 6531 | if (!result) { |
| 6532 | return false; |
| 6533 | } |
| 6534 | |
| 6535 | for (size_t i = 0; i < globals.length(); i++) { |
| 6536 | RootedValue globalValue(cx, ObjectValue(*globals[i])); |
| 6537 | if (!dbg->wrapDebuggeeValue(cx, &globalValue)) { |
| 6538 | return false; |
| 6539 | } |
| 6540 | if (!NewbornArrayPush(cx, result, globalValue)) { |
| 6541 | return false; |
| 6542 | } |
| 6543 | } |
| 6544 | |
| 6545 | args.rval().setObject(*result); |
| 6546 | return true; |
| 6547 | } |
| 6548 | |
| 6549 | bool Debugger::CallData::findSourceURLs() { |
| 6550 | RootedObject result(cx, NewDenseEmptyArray(cx)); |
| 6551 | if (!result) { |
| 6552 | return false; |
| 6553 | } |
| 6554 | |
| 6555 | for (WeakGlobalObjectSet::Range r = dbg->allDebuggees(); !r.empty(); |
| 6556 | r.popFront()) { |
| 6557 | RootedObject holder(cx, r.front()->getSourceURLsHolder()); |
| 6558 | if (holder) { |
| 6559 | for (size_t i = 0; i < holder->as<ArrayObject>().length(); i++) { |
| 6560 | Value v = holder->as<ArrayObject>().getDenseElement(i); |
| 6561 | |
| 6562 | // The value is an atom and doesn't need wrapping, but the holder may be |
| 6563 | // in another zone and the atom must be marked when we create a |
| 6564 | // reference in this zone. |
| 6565 | MOZ_ASSERT(v.isString() && v.toString()->isAtom())do { static_assert( mozilla::detail::AssertionConditionType< decltype(v.isString() && v.toString()->isAtom())> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(v.isString() && v.toString()->isAtom()))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("v.isString() && v.toString()->isAtom()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 6565); AnnotateMozCrashReason("MOZ_ASSERT" "(" "v.isString() && v.toString()->isAtom()" ")"); do { *((volatile int*)__null) = 6565; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 6566 | cx->markAtomValue(v); |
| 6567 | |
| 6568 | if (!NewbornArrayPush(cx, result, v)) { |
| 6569 | return false; |
| 6570 | } |
| 6571 | } |
| 6572 | } |
| 6573 | } |
| 6574 | |
| 6575 | args.rval().setObject(*result); |
| 6576 | return true; |
| 6577 | } |
| 6578 | |
| 6579 | bool Debugger::CallData::makeGlobalObjectReference() { |
| 6580 | if (!args.requireAtLeast(cx, "Debugger.makeGlobalObjectReference", 1)) { |
| 6581 | return false; |
| 6582 | } |
| 6583 | |
| 6584 | Rooted<GlobalObject*> global(cx, dbg->unwrapDebuggeeArgument(cx, args[0])); |
| 6585 | if (!global) { |
| 6586 | return false; |
| 6587 | } |
| 6588 | |
| 6589 | // If we create a D.O referring to a global in an invisible realm, |
| 6590 | // then from it we can reach function objects, scripts, environments, etc., |
| 6591 | // none of which we're ever supposed to see. |
| 6592 | if (global->realm()->creationOptions().invisibleToDebugger()) { |
| 6593 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 6594 | JSMSG_DEBUG_INVISIBLE_COMPARTMENT); |
| 6595 | return false; |
| 6596 | } |
| 6597 | |
| 6598 | args.rval().setObject(*global); |
| 6599 | return dbg->wrapDebuggeeValue(cx, args.rval()); |
| 6600 | } |
| 6601 | |
| 6602 | bool Debugger::isCompilableUnit(JSContext* cx, unsigned argc, Value* vp) { |
| 6603 | CallArgs args = CallArgsFromVp(argc, vp); |
| 6604 | |
| 6605 | if (!args.requireAtLeast(cx, "Debugger.isCompilableUnit", 1)) { |
| 6606 | return false; |
| 6607 | } |
| 6608 | |
| 6609 | if (!args[0].isString()) { |
| 6610 | JS_ReportErrorNumberASCII( |
| 6611 | cx, GetErrorMessage, nullptr, JSMSG_NOT_EXPECTED_TYPE, |
| 6612 | "Debugger.isCompilableUnit", "string", InformalValueTypeName(args[0])); |
| 6613 | return false; |
| 6614 | } |
| 6615 | |
| 6616 | JSString* str = args[0].toString(); |
| 6617 | size_t length = str->length(); |
| 6618 | |
| 6619 | AutoStableStringChars chars(cx); |
| 6620 | if (!chars.initTwoByte(cx, str)) { |
| 6621 | return false; |
| 6622 | } |
| 6623 | |
| 6624 | bool result = true; |
| 6625 | |
| 6626 | AutoReportFrontendContext fc(cx, |
| 6627 | AutoReportFrontendContext::Warning::Suppress); |
| 6628 | CompileOptions options(cx); |
| 6629 | Rooted<frontend::CompilationInput> input(cx, |
| 6630 | frontend::CompilationInput(options)); |
| 6631 | if (!input.get().initForGlobal(&fc)) { |
| 6632 | return false; |
| 6633 | } |
| 6634 | |
| 6635 | LifoAllocScope allocScope(&cx->tempLifoAlloc()); |
| 6636 | frontend::NoScopeBindingCache scopeCache; |
| 6637 | frontend::CompilationState compilationState(&fc, allocScope, input.get()); |
| 6638 | if (!compilationState.init(&fc, &scopeCache)) { |
| 6639 | return false; |
| 6640 | } |
| 6641 | |
| 6642 | frontend::Parser<frontend::FullParseHandler, char16_t> parser( |
| 6643 | &fc, options, chars.twoByteChars(), length, compilationState, |
| 6644 | /* syntaxParser = */ nullptr); |
| 6645 | if (!parser.checkOptions() || parser.parse().isErr()) { |
| 6646 | // We ran into an error. If it was because we ran out of memory we report |
| 6647 | // it in the usual way. |
| 6648 | if (fc.hadOutOfMemory()) { |
| 6649 | return false; |
| 6650 | } |
| 6651 | |
| 6652 | // If it was because we ran out of source, we return false so our caller |
| 6653 | // knows to try to collect more [source]. |
| 6654 | if (parser.isUnexpectedEOF()) { |
| 6655 | result = false; |
| 6656 | } |
| 6657 | |
| 6658 | fc.clearAutoReport(); |
| 6659 | } |
| 6660 | |
| 6661 | args.rval().setBoolean(result); |
| 6662 | return true; |
| 6663 | } |
| 6664 | |
| 6665 | bool Debugger::CallData::adoptDebuggeeValue() { |
| 6666 | if (!args.requireAtLeast(cx, "Debugger.adoptDebuggeeValue", 1)) { |
| 6667 | return false; |
| 6668 | } |
| 6669 | |
| 6670 | RootedValue v(cx, args[0]); |
| 6671 | if (v.isObject()) { |
| 6672 | RootedObject obj(cx, &v.toObject()); |
| 6673 | DebuggerObject* ndobj = ToNativeDebuggerObject(cx, &obj); |
| 6674 | if (!ndobj) { |
| 6675 | return false; |
| 6676 | } |
| 6677 | |
| 6678 | obj.set(ndobj->referent()); |
| 6679 | v = ObjectValue(*obj); |
| 6680 | |
| 6681 | if (!dbg->wrapDebuggeeValue(cx, &v)) { |
| 6682 | return false; |
| 6683 | } |
| 6684 | } |
| 6685 | |
| 6686 | args.rval().set(v); |
| 6687 | return true; |
| 6688 | } |
| 6689 | |
| 6690 | class DebuggerAdoptSourceMatcher { |
| 6691 | JSContext* cx_; |
| 6692 | Debugger* dbg_; |
| 6693 | |
| 6694 | public: |
| 6695 | explicit DebuggerAdoptSourceMatcher(JSContext* cx, Debugger* dbg) |
| 6696 | : cx_(cx), dbg_(dbg) {} |
| 6697 | |
| 6698 | using ReturnType = DebuggerSource*; |
| 6699 | |
| 6700 | ReturnType match(Handle<ScriptSourceObject*> source) { |
| 6701 | if (source->compartment() == cx_->compartment()) { |
| 6702 | JS_ReportErrorASCII(cx_, |
| 6703 | "Source is in the same compartment as this debugger"); |
| 6704 | return nullptr; |
| 6705 | } |
| 6706 | return dbg_->wrapSource(cx_, source); |
| 6707 | } |
| 6708 | ReturnType match(Handle<WasmInstanceObject*> wasmInstance) { |
| 6709 | if (wasmInstance->compartment() == cx_->compartment()) { |
| 6710 | JS_ReportErrorASCII( |
| 6711 | cx_, "WasmInstance is in the same compartment as this debugger"); |
| 6712 | return nullptr; |
| 6713 | } |
| 6714 | return dbg_->wrapWasmSource(cx_, wasmInstance); |
| 6715 | } |
| 6716 | }; |
| 6717 | |
| 6718 | bool Debugger::CallData::adoptFrame() { |
| 6719 | if (!args.requireAtLeast(cx, "Debugger.adoptFrame", 1)) { |
| 6720 | return false; |
| 6721 | } |
| 6722 | |
| 6723 | RootedObject obj(cx, RequireObject(cx, args[0])); |
| 6724 | if (!obj) { |
| 6725 | return false; |
| 6726 | } |
| 6727 | |
| 6728 | obj = UncheckedUnwrap(obj); |
| 6729 | if (!obj->is<DebuggerFrame>()) { |
| 6730 | JS_ReportErrorASCII(cx, "Argument is not a Debugger.Frame"); |
| 6731 | return false; |
| 6732 | } |
| 6733 | |
| 6734 | RootedValue objVal(cx, ObjectValue(*obj)); |
| 6735 | Rooted<DebuggerFrame*> frameObj(cx, DebuggerFrame::check(cx, objVal)); |
| 6736 | if (!frameObj) { |
| 6737 | return false; |
| 6738 | } |
| 6739 | |
| 6740 | Rooted<DebuggerFrame*> adoptedFrame(cx); |
| 6741 | if (frameObj->isOnStack()) { |
| 6742 | FrameIter iter = frameObj->getFrameIter(cx); |
| 6743 | if (!dbg->observesFrame(iter)) { |
| 6744 | JS_ReportErrorASCII(cx, "Debugger.Frame's global is not a debuggee"); |
| 6745 | return false; |
| 6746 | } |
| 6747 | if (!dbg->getFrame(cx, iter, &adoptedFrame)) { |
| 6748 | return false; |
| 6749 | } |
| 6750 | } else if (frameObj->isSuspended()) { |
| 6751 | Rooted<AbstractGeneratorObject*> gen(cx, &frameObj->unwrappedGenerator()); |
| 6752 | if (!dbg->observesGlobal(&gen->global())) { |
| 6753 | JS_ReportErrorASCII(cx, "Debugger.Frame's global is not a debuggee"); |
| 6754 | return false; |
| 6755 | } |
| 6756 | |
| 6757 | if (!dbg->getFrame(cx, gen, &adoptedFrame)) { |
| 6758 | return false; |
| 6759 | } |
| 6760 | } else { |
| 6761 | if (!dbg->getFrame(cx, &adoptedFrame)) { |
| 6762 | return false; |
| 6763 | } |
| 6764 | } |
| 6765 | |
| 6766 | args.rval().setObject(*adoptedFrame); |
| 6767 | return true; |
| 6768 | } |
| 6769 | |
| 6770 | bool Debugger::CallData::adoptSource() { |
| 6771 | if (!args.requireAtLeast(cx, "Debugger.adoptSource", 1)) { |
| 6772 | return false; |
| 6773 | } |
| 6774 | |
| 6775 | RootedObject obj(cx, RequireObject(cx, args[0])); |
| 6776 | if (!obj) { |
| 6777 | return false; |
| 6778 | } |
| 6779 | |
| 6780 | obj = UncheckedUnwrap(obj); |
| 6781 | if (!obj->is<DebuggerSource>()) { |
| 6782 | JS_ReportErrorASCII(cx, "Argument is not a Debugger.Source"); |
| 6783 | return false; |
| 6784 | } |
| 6785 | |
| 6786 | Rooted<DebuggerSource*> sourceObj(cx, &obj->as<DebuggerSource>()); |
| 6787 | if (!sourceObj->getReferentRawObject()) { |
| 6788 | JS_ReportErrorASCII(cx, "Argument is Debugger.Source.prototype"); |
| 6789 | return false; |
| 6790 | } |
| 6791 | |
| 6792 | Rooted<DebuggerSourceReferent> referent(cx, sourceObj->getReferent()); |
| 6793 | |
| 6794 | DebuggerAdoptSourceMatcher matcher(cx, dbg); |
| 6795 | DebuggerSource* res = referent.match(matcher); |
| 6796 | if (!res) { |
| 6797 | return false; |
| 6798 | } |
| 6799 | |
| 6800 | args.rval().setObject(*res); |
| 6801 | return true; |
| 6802 | } |
| 6803 | |
| 6804 | bool Debugger::CallData::enableAsyncStack() { |
| 6805 | if (!args.requireAtLeast(cx, "Debugger.enableAsyncStack", 1)) { |
| 6806 | return false; |
| 6807 | } |
| 6808 | Rooted<GlobalObject*> global(cx, dbg->unwrapDebuggeeArgument(cx, args[0])); |
| 6809 | if (!global) { |
| 6810 | return false; |
| 6811 | } |
| 6812 | |
| 6813 | global->realm()->isAsyncStackCapturingEnabled = true; |
| 6814 | |
| 6815 | args.rval().setUndefined(); |
| 6816 | return true; |
| 6817 | } |
| 6818 | |
| 6819 | bool Debugger::CallData::disableAsyncStack() { |
| 6820 | if (!args.requireAtLeast(cx, "Debugger.disableAsyncStack", 1)) { |
| 6821 | return false; |
| 6822 | } |
| 6823 | Rooted<GlobalObject*> global(cx, dbg->unwrapDebuggeeArgument(cx, args[0])); |
| 6824 | if (!global) { |
| 6825 | return false; |
| 6826 | } |
| 6827 | |
| 6828 | global->realm()->isAsyncStackCapturingEnabled = false; |
| 6829 | |
| 6830 | args.rval().setUndefined(); |
| 6831 | return true; |
| 6832 | } |
| 6833 | |
| 6834 | bool Debugger::CallData::enableUnlimitedStacksCapturing() { |
| 6835 | if (!args.requireAtLeast(cx, "Debugger.enableUnlimitedStacksCapturing", 1)) { |
| 6836 | return false; |
| 6837 | } |
| 6838 | Rooted<GlobalObject*> global(cx, dbg->unwrapDebuggeeArgument(cx, args[0])); |
| 6839 | if (!global) { |
| 6840 | return false; |
| 6841 | } |
| 6842 | |
| 6843 | global->realm()->isUnlimitedStacksCapturingEnabled = true; |
| 6844 | |
| 6845 | args.rval().setUndefined(); |
| 6846 | return true; |
| 6847 | } |
| 6848 | |
| 6849 | bool Debugger::CallData::disableUnlimitedStacksCapturing() { |
| 6850 | if (!args.requireAtLeast(cx, "Debugger.disableUnlimitedStacksCapturing", 1)) { |
| 6851 | return false; |
| 6852 | } |
| 6853 | Rooted<GlobalObject*> global(cx, dbg->unwrapDebuggeeArgument(cx, args[0])); |
| 6854 | if (!global) { |
| 6855 | return false; |
| 6856 | } |
| 6857 | |
| 6858 | global->realm()->isUnlimitedStacksCapturingEnabled = false; |
| 6859 | |
| 6860 | args.rval().setUndefined(); |
| 6861 | return true; |
| 6862 | } |
| 6863 | |
| 6864 | const JSPropertySpec Debugger::properties[] = { |
| 6865 | JS_DEBUG_PSGS("onDebuggerStatement", getOnDebuggerStatement,JSPropertySpec::nativeAccessors("onDebuggerStatement", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getOnDebuggerStatement >, nullptr, CallData::ToNative<&CallData::setOnDebuggerStatement >, nullptr) |
| 6866 | setOnDebuggerStatement)JSPropertySpec::nativeAccessors("onDebuggerStatement", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getOnDebuggerStatement >, nullptr, CallData::ToNative<&CallData::setOnDebuggerStatement >, nullptr), |
| 6867 | JS_DEBUG_PSGS("onExceptionUnwind", getOnExceptionUnwind,JSPropertySpec::nativeAccessors("onExceptionUnwind", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getOnExceptionUnwind >, nullptr, CallData::ToNative<&CallData::setOnExceptionUnwind >, nullptr) |
| 6868 | setOnExceptionUnwind)JSPropertySpec::nativeAccessors("onExceptionUnwind", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getOnExceptionUnwind >, nullptr, CallData::ToNative<&CallData::setOnExceptionUnwind >, nullptr), |
| 6869 | JS_DEBUG_PSGS("onNewScript", getOnNewScript, setOnNewScript)JSPropertySpec::nativeAccessors("onNewScript", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getOnNewScript >, nullptr, CallData::ToNative<&CallData::setOnNewScript >, nullptr), |
| 6870 | JS_DEBUG_PSGS("onNewPromise", getOnNewPromise, setOnNewPromise)JSPropertySpec::nativeAccessors("onNewPromise", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getOnNewPromise >, nullptr, CallData::ToNative<&CallData::setOnNewPromise >, nullptr), |
| 6871 | JS_DEBUG_PSGS("onPromiseSettled", getOnPromiseSettled, setOnPromiseSettled)JSPropertySpec::nativeAccessors("onPromiseSettled", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getOnPromiseSettled >, nullptr, CallData::ToNative<&CallData::setOnPromiseSettled >, nullptr), |
| 6872 | JS_DEBUG_PSGS("onEnterFrame", getOnEnterFrame, setOnEnterFrame)JSPropertySpec::nativeAccessors("onEnterFrame", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getOnEnterFrame >, nullptr, CallData::ToNative<&CallData::setOnEnterFrame >, nullptr), |
| 6873 | JS_DEBUG_PSGS("onNativeCall", getOnNativeCall, setOnNativeCall)JSPropertySpec::nativeAccessors("onNativeCall", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getOnNativeCall >, nullptr, CallData::ToNative<&CallData::setOnNativeCall >, nullptr), |
| 6874 | JS_DEBUG_PSGS("shouldAvoidSideEffects", getShouldAvoidSideEffects,JSPropertySpec::nativeAccessors("shouldAvoidSideEffects", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getShouldAvoidSideEffects >, nullptr, CallData::ToNative<&CallData::setShouldAvoidSideEffects >, nullptr) |
| 6875 | setShouldAvoidSideEffects)JSPropertySpec::nativeAccessors("shouldAvoidSideEffects", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getShouldAvoidSideEffects >, nullptr, CallData::ToNative<&CallData::setShouldAvoidSideEffects >, nullptr), |
| 6876 | JS_DEBUG_PSGS("onNewGlobalObject", getOnNewGlobalObject,JSPropertySpec::nativeAccessors("onNewGlobalObject", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getOnNewGlobalObject >, nullptr, CallData::ToNative<&CallData::setOnNewGlobalObject >, nullptr) |
| 6877 | setOnNewGlobalObject)JSPropertySpec::nativeAccessors("onNewGlobalObject", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getOnNewGlobalObject >, nullptr, CallData::ToNative<&CallData::setOnNewGlobalObject >, nullptr), |
| 6878 | JS_DEBUG_PSGS("uncaughtExceptionHook", getUncaughtExceptionHook,JSPropertySpec::nativeAccessors("uncaughtExceptionHook", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getUncaughtExceptionHook >, nullptr, CallData::ToNative<&CallData::setUncaughtExceptionHook >, nullptr) |
| 6879 | setUncaughtExceptionHook)JSPropertySpec::nativeAccessors("uncaughtExceptionHook", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getUncaughtExceptionHook >, nullptr, CallData::ToNative<&CallData::setUncaughtExceptionHook >, nullptr), |
| 6880 | JS_DEBUG_PSGS("allowUnobservedAsmJS", getAllowUnobservedAsmJS,JSPropertySpec::nativeAccessors("allowUnobservedAsmJS", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getAllowUnobservedAsmJS >, nullptr, CallData::ToNative<&CallData::setAllowUnobservedAsmJS >, nullptr) |
| 6881 | setAllowUnobservedAsmJS)JSPropertySpec::nativeAccessors("allowUnobservedAsmJS", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getAllowUnobservedAsmJS >, nullptr, CallData::ToNative<&CallData::setAllowUnobservedAsmJS >, nullptr), |
| 6882 | JS_DEBUG_PSGS("allowUnobservedWasm", getAllowUnobservedWasm,JSPropertySpec::nativeAccessors("allowUnobservedWasm", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getAllowUnobservedWasm >, nullptr, CallData::ToNative<&CallData::setAllowUnobservedWasm >, nullptr) |
| 6883 | setAllowUnobservedWasm)JSPropertySpec::nativeAccessors("allowUnobservedWasm", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getAllowUnobservedWasm >, nullptr, CallData::ToNative<&CallData::setAllowUnobservedWasm >, nullptr), |
| 6884 | JS_DEBUG_PSGS("collectCoverageInfo", getCollectCoverageInfo,JSPropertySpec::nativeAccessors("collectCoverageInfo", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getCollectCoverageInfo >, nullptr, CallData::ToNative<&CallData::setCollectCoverageInfo >, nullptr) |
| 6885 | setCollectCoverageInfo)JSPropertySpec::nativeAccessors("collectCoverageInfo", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getCollectCoverageInfo >, nullptr, CallData::ToNative<&CallData::setCollectCoverageInfo >, nullptr), |
| 6886 | JS_DEBUG_PSGS("exclusiveDebuggerOnEval", getExclusiveDebuggerOnEval,JSPropertySpec::nativeAccessors("exclusiveDebuggerOnEval", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getExclusiveDebuggerOnEval >, nullptr, CallData::ToNative<&CallData::setExclusiveDebuggerOnEval >, nullptr) |
| 6887 | setExclusiveDebuggerOnEval)JSPropertySpec::nativeAccessors("exclusiveDebuggerOnEval", CheckAccessorAttrs <0>(), CallData::ToNative<&CallData::getExclusiveDebuggerOnEval >, nullptr, CallData::ToNative<&CallData::setExclusiveDebuggerOnEval >, nullptr), |
| 6888 | JS_DEBUG_PSGS("inspectNativeCallArguments", getInspectNativeCallArguments,JSPropertySpec::nativeAccessors("inspectNativeCallArguments", CheckAccessorAttrs<0>(), CallData::ToNative<&CallData ::getInspectNativeCallArguments>, nullptr, CallData::ToNative <&CallData::setInspectNativeCallArguments>, nullptr ) |
| 6889 | setInspectNativeCallArguments)JSPropertySpec::nativeAccessors("inspectNativeCallArguments", CheckAccessorAttrs<0>(), CallData::ToNative<&CallData ::getInspectNativeCallArguments>, nullptr, CallData::ToNative <&CallData::setInspectNativeCallArguments>, nullptr ), |
| 6890 | JS_DEBUG_PSG("memory", getMemory)JSPropertySpec::nativeAccessors("memory", CheckAccessorAttrs< 0>(), CallData::ToNative<&CallData::getMemory>, nullptr ), |
| 6891 | JS_STRING_SYM_PS(toStringTag, "Debugger", JSPROP_READONLY)JSPropertySpec::stringValue(::JS::SymbolCode::toStringTag, JSPROP_READONLY , "Debugger"), |
| 6892 | JS_PS_ENDJSPropertySpec::sentinel(), |
| 6893 | }; |
| 6894 | |
| 6895 | const JSFunctionSpec Debugger::methods[] = { |
| 6896 | JS_DEBUG_FN("addDebuggee", addDebuggee, 1){JSFunctionSpec::Name("addDebuggee"), {CallData::ToNative< &CallData::addDebuggee>, nullptr}, 1, 0, nullptr}, |
| 6897 | JS_DEBUG_FN("addAllGlobalsAsDebuggees", addAllGlobalsAsDebuggees, 0){JSFunctionSpec::Name("addAllGlobalsAsDebuggees"), {CallData:: ToNative<&CallData::addAllGlobalsAsDebuggees>, nullptr }, 0, 0, nullptr}, |
| 6898 | JS_DEBUG_FN("removeDebuggee", removeDebuggee, 1){JSFunctionSpec::Name("removeDebuggee"), {CallData::ToNative< &CallData::removeDebuggee>, nullptr}, 1, 0, nullptr}, |
| 6899 | JS_DEBUG_FN("removeAllDebuggees", removeAllDebuggees, 0){JSFunctionSpec::Name("removeAllDebuggees"), {CallData::ToNative <&CallData::removeAllDebuggees>, nullptr}, 0, 0, nullptr }, |
| 6900 | JS_DEBUG_FN("hasDebuggee", hasDebuggee, 1){JSFunctionSpec::Name("hasDebuggee"), {CallData::ToNative< &CallData::hasDebuggee>, nullptr}, 1, 0, nullptr}, |
| 6901 | JS_DEBUG_FN("getDebuggees", getDebuggees, 0){JSFunctionSpec::Name("getDebuggees"), {CallData::ToNative< &CallData::getDebuggees>, nullptr}, 0, 0, nullptr}, |
| 6902 | JS_DEBUG_FN("getNewestFrame", getNewestFrame, 0){JSFunctionSpec::Name("getNewestFrame"), {CallData::ToNative< &CallData::getNewestFrame>, nullptr}, 0, 0, nullptr}, |
| 6903 | JS_DEBUG_FN("clearAllBreakpoints", clearAllBreakpoints, 0){JSFunctionSpec::Name("clearAllBreakpoints"), {CallData::ToNative <&CallData::clearAllBreakpoints>, nullptr}, 0, 0, nullptr }, |
| 6904 | JS_DEBUG_FN("findScripts", findScripts, 1){JSFunctionSpec::Name("findScripts"), {CallData::ToNative< &CallData::findScripts>, nullptr}, 1, 0, nullptr}, |
| 6905 | JS_DEBUG_FN("findSources", findSources, 1){JSFunctionSpec::Name("findSources"), {CallData::ToNative< &CallData::findSources>, nullptr}, 1, 0, nullptr}, |
| 6906 | JS_DEBUG_FN("findObjects", findObjects, 1){JSFunctionSpec::Name("findObjects"), {CallData::ToNative< &CallData::findObjects>, nullptr}, 1, 0, nullptr}, |
| 6907 | JS_DEBUG_FN("findAllGlobals", findAllGlobals, 0){JSFunctionSpec::Name("findAllGlobals"), {CallData::ToNative< &CallData::findAllGlobals>, nullptr}, 0, 0, nullptr}, |
| 6908 | JS_DEBUG_FN("findSourceURLs", findSourceURLs, 0){JSFunctionSpec::Name("findSourceURLs"), {CallData::ToNative< &CallData::findSourceURLs>, nullptr}, 0, 0, nullptr}, |
| 6909 | JS_DEBUG_FN("makeGlobalObjectReference", makeGlobalObjectReference, 1){JSFunctionSpec::Name("makeGlobalObjectReference"), {CallData ::ToNative<&CallData::makeGlobalObjectReference>, nullptr }, 1, 0, nullptr}, |
| 6910 | JS_DEBUG_FN("adoptDebuggeeValue", adoptDebuggeeValue, 1){JSFunctionSpec::Name("adoptDebuggeeValue"), {CallData::ToNative <&CallData::adoptDebuggeeValue>, nullptr}, 1, 0, nullptr }, |
| 6911 | JS_DEBUG_FN("adoptFrame", adoptFrame, 1){JSFunctionSpec::Name("adoptFrame"), {CallData::ToNative<& CallData::adoptFrame>, nullptr}, 1, 0, nullptr}, |
| 6912 | JS_DEBUG_FN("adoptSource", adoptSource, 1){JSFunctionSpec::Name("adoptSource"), {CallData::ToNative< &CallData::adoptSource>, nullptr}, 1, 0, nullptr}, |
| 6913 | JS_DEBUG_FN("enableAsyncStack", enableAsyncStack, 1){JSFunctionSpec::Name("enableAsyncStack"), {CallData::ToNative <&CallData::enableAsyncStack>, nullptr}, 1, 0, nullptr }, |
| 6914 | JS_DEBUG_FN("disableAsyncStack", disableAsyncStack, 1){JSFunctionSpec::Name("disableAsyncStack"), {CallData::ToNative <&CallData::disableAsyncStack>, nullptr}, 1, 0, nullptr }, |
| 6915 | JS_DEBUG_FN("enableUnlimitedStacksCapturing",{JSFunctionSpec::Name("enableUnlimitedStacksCapturing"), {CallData ::ToNative<&CallData::enableUnlimitedStacksCapturing> , nullptr}, 1, 0, nullptr} |
| 6916 | enableUnlimitedStacksCapturing, 1){JSFunctionSpec::Name("enableUnlimitedStacksCapturing"), {CallData ::ToNative<&CallData::enableUnlimitedStacksCapturing> , nullptr}, 1, 0, nullptr}, |
| 6917 | JS_DEBUG_FN("disableUnlimitedStacksCapturing",{JSFunctionSpec::Name("disableUnlimitedStacksCapturing"), {CallData ::ToNative<&CallData::disableUnlimitedStacksCapturing> , nullptr}, 1, 0, nullptr} |
| 6918 | disableUnlimitedStacksCapturing, 1){JSFunctionSpec::Name("disableUnlimitedStacksCapturing"), {CallData ::ToNative<&CallData::disableUnlimitedStacksCapturing> , nullptr}, 1, 0, nullptr}, |
| 6919 | JS_FS_END{JSFunctionSpec::Name(nullptr), {nullptr, nullptr}, 0, 0, nullptr }, |
| 6920 | }; |
| 6921 | |
| 6922 | const JSFunctionSpec Debugger::static_methods[]{ |
| 6923 | JS_FN("isCompilableUnit", Debugger::isCompilableUnit, 1, 0){JSFunctionSpec::Name("isCompilableUnit"), {Debugger::isCompilableUnit , nullptr}, 1, 0, nullptr}, |
| 6924 | JS_FS_END{JSFunctionSpec::Name(nullptr), {nullptr, nullptr}, 0, 0, nullptr }, |
| 6925 | }; |
| 6926 | |
| 6927 | DebuggerScript* Debugger::newDebuggerScript( |
| 6928 | JSContext* cx, Handle<DebuggerScriptReferent> referent) { |
| 6929 | cx->check(object.get()); |
| 6930 | |
| 6931 | RootedObject proto( |
| 6932 | cx, &object->getReservedSlot(JSSLOT_DEBUG_SCRIPT_PROTO).toObject()); |
| 6933 | MOZ_ASSERT(proto)do { static_assert( mozilla::detail::AssertionConditionType< decltype(proto)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(proto))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("proto", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 6933); AnnotateMozCrashReason("MOZ_ASSERT" "(" "proto" ")") ; do { *((volatile int*)__null) = 6933; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 6934 | Rooted<NativeObject*> debugger(cx, object); |
| 6935 | |
| 6936 | return DebuggerScript::create(cx, proto, referent, debugger); |
| 6937 | } |
| 6938 | |
| 6939 | template <typename ReferentType, typename Map> |
| 6940 | typename Map::WrapperType* Debugger::wrapVariantReferent( |
| 6941 | JSContext* cx, Map& map, |
| 6942 | Handle<typename Map::WrapperType::ReferentVariant> referent) { |
| 6943 | cx->check(object); |
| 6944 | |
| 6945 | Handle<ReferentType*> untaggedReferent = |
| 6946 | referent.template as<ReferentType*>(); |
| 6947 | MOZ_ASSERT(cx->compartment() != untaggedReferent->compartment())do { static_assert( mozilla::detail::AssertionConditionType< decltype(cx->compartment() != untaggedReferent->compartment ())>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(cx->compartment() != untaggedReferent->compartment ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("cx->compartment() != untaggedReferent->compartment()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 6947); AnnotateMozCrashReason("MOZ_ASSERT" "(" "cx->compartment() != untaggedReferent->compartment()" ")"); do { *((volatile int*)__null) = 6947; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 6948 | |
| 6949 | DependentAddPtr<Map> p(cx, map, untaggedReferent); |
| 6950 | if (!p) { |
| 6951 | typename Map::WrapperType* wrapper = newVariantWrapper(cx, referent); |
| 6952 | if (!wrapper) { |
| 6953 | return nullptr; |
| 6954 | } |
| 6955 | |
| 6956 | if (!p.add(cx, map, untaggedReferent, wrapper)) { |
| 6957 | // We need to destroy the edge to the referent, to avoid trying to trace |
| 6958 | // it during untimely collections. |
| 6959 | wrapper->clearReferent(); |
| 6960 | return nullptr; |
| 6961 | } |
| 6962 | } |
| 6963 | |
| 6964 | return &p->value()->template as<typename Map::WrapperType>(); |
| 6965 | } |
| 6966 | |
| 6967 | DebuggerScript* Debugger::wrapVariantReferent( |
| 6968 | JSContext* cx, Handle<DebuggerScriptReferent> referent) { |
| 6969 | if (referent.is<BaseScript*>()) { |
| 6970 | return wrapVariantReferent<BaseScript>(cx, scripts, referent); |
| 6971 | } |
| 6972 | |
| 6973 | return wrapVariantReferent<WasmInstanceObject>(cx, wasmInstanceScripts, |
| 6974 | referent); |
| 6975 | } |
| 6976 | |
| 6977 | DebuggerScript* Debugger::wrapScript(JSContext* cx, |
| 6978 | Handle<BaseScript*> script) { |
| 6979 | Rooted<DebuggerScriptReferent> referent(cx, |
| 6980 | DebuggerScriptReferent(script.get())); |
| 6981 | return wrapVariantReferent(cx, referent); |
| 6982 | } |
| 6983 | |
| 6984 | DebuggerScript* Debugger::wrapWasmScript( |
| 6985 | JSContext* cx, Handle<WasmInstanceObject*> wasmInstance) { |
| 6986 | Rooted<DebuggerScriptReferent> referent(cx, wasmInstance.get()); |
| 6987 | return wrapVariantReferent(cx, referent); |
| 6988 | } |
| 6989 | |
| 6990 | DebuggerSource* Debugger::newDebuggerSource( |
| 6991 | JSContext* cx, Handle<DebuggerSourceReferent> referent) { |
| 6992 | cx->check(object.get()); |
| 6993 | |
| 6994 | RootedObject proto( |
| 6995 | cx, &object->getReservedSlot(JSSLOT_DEBUG_SOURCE_PROTO).toObject()); |
| 6996 | MOZ_ASSERT(proto)do { static_assert( mozilla::detail::AssertionConditionType< decltype(proto)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(proto))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("proto", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 6996); AnnotateMozCrashReason("MOZ_ASSERT" "(" "proto" ")") ; do { *((volatile int*)__null) = 6996; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 6997 | Rooted<NativeObject*> debugger(cx, object); |
| 6998 | return DebuggerSource::create(cx, proto, referent, debugger); |
| 6999 | } |
| 7000 | |
| 7001 | DebuggerSource* Debugger::wrapVariantReferent( |
| 7002 | JSContext* cx, Handle<DebuggerSourceReferent> referent) { |
| 7003 | DebuggerSource* obj; |
| 7004 | if (referent.is<ScriptSourceObject*>()) { |
| 7005 | obj = wrapVariantReferent<ScriptSourceObject>(cx, sources, referent); |
| 7006 | } else { |
| 7007 | obj = wrapVariantReferent<WasmInstanceObject>(cx, wasmInstanceSources, |
| 7008 | referent); |
| 7009 | } |
| 7010 | MOZ_ASSERT_IF(obj, obj->getReferent() == referent)do { if (obj) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(obj->getReferent() == referent)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(! !(obj->getReferent() == referent))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("obj->getReferent() == referent" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7010); AnnotateMozCrashReason("MOZ_ASSERT" "(" "obj->getReferent() == referent" ")"); do { *((volatile int*)__null) = 7010; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 7011 | return obj; |
| 7012 | } |
| 7013 | |
| 7014 | DebuggerSource* Debugger::wrapSource(JSContext* cx, |
| 7015 | Handle<ScriptSourceObject*> source) { |
| 7016 | Rooted<DebuggerSourceReferent> referent(cx, source.get()); |
| 7017 | return wrapVariantReferent(cx, referent); |
| 7018 | } |
| 7019 | |
| 7020 | DebuggerSource* Debugger::wrapWasmSource( |
| 7021 | JSContext* cx, Handle<WasmInstanceObject*> wasmInstance) { |
| 7022 | Rooted<DebuggerSourceReferent> referent(cx, wasmInstance.get()); |
| 7023 | return wrapVariantReferent(cx, referent); |
| 7024 | } |
| 7025 | |
| 7026 | bool Debugger::observesFrame(AbstractFramePtr frame) const { |
| 7027 | if (frame.isWasmDebugFrame()) { |
| 7028 | return observesWasm(frame.wasmInstance()); |
| 7029 | } |
| 7030 | |
| 7031 | return observesScript(frame.script()); |
| 7032 | } |
| 7033 | |
| 7034 | bool Debugger::observesFrame(const FrameIter& iter) const { |
| 7035 | // Skip frames not yet fully initialized during their prologue. |
| 7036 | if (iter.isInterp() && iter.isFunctionFrame()) { |
| 7037 | const Value& thisVal = iter.interpFrame()->thisArgument(); |
| 7038 | if (thisVal.isMagic() && thisVal.whyMagic() == JS_IS_CONSTRUCTING) { |
| 7039 | return false; |
| 7040 | } |
| 7041 | } |
| 7042 | if (iter.isWasm()) { |
| 7043 | // Skip frame of wasm instances we cannot observe. |
| 7044 | if (!iter.wasmDebugEnabled()) { |
| 7045 | return false; |
| 7046 | } |
| 7047 | return observesWasm(iter.wasmInstance()); |
| 7048 | } |
| 7049 | return observesScript(iter.script()); |
| 7050 | } |
| 7051 | |
| 7052 | bool Debugger::observesScript(JSScript* script) const { |
| 7053 | // Don't ever observe self-hosted scripts: the Debugger API can break |
| 7054 | // self-hosted invariants. |
| 7055 | return observesGlobal(&script->global()) && !script->selfHosted(); |
| 7056 | } |
| 7057 | |
| 7058 | bool Debugger::observesWasm(wasm::Instance* instance) const { |
| 7059 | if (!instance->debugEnabled()) { |
| 7060 | return false; |
| 7061 | } |
| 7062 | return observesGlobal(&instance->object()->global()); |
| 7063 | } |
| 7064 | |
| 7065 | /* static */ |
| 7066 | bool Debugger::replaceFrameGuts(JSContext* cx, AbstractFramePtr from, |
| 7067 | AbstractFramePtr to, ScriptFrameIter& iter) { |
| 7068 | MOZ_ASSERT(from != to)do { static_assert( mozilla::detail::AssertionConditionType< decltype(from != to)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(from != to))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("from != to", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7068); AnnotateMozCrashReason("MOZ_ASSERT" "(" "from != to" ")"); do { *((volatile int*)__null) = 7068; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7069 | |
| 7070 | // Rekey missingScopes to maintain Debugger.Environment identity and |
| 7071 | // forward liveScopes to point to the new frame. |
| 7072 | DebugEnvironments::forwardLiveFrame(cx, from, to); |
| 7073 | |
| 7074 | // If we hit an OOM anywhere in here, we need to make sure there aren't any |
| 7075 | // Debugger.Frame objects left partially-initialized. |
| 7076 | auto terminateDebuggerFramesOnExit = MakeScopeExit([&] { |
| 7077 | terminateDebuggerFrames(cx, from); |
| 7078 | terminateDebuggerFrames(cx, to); |
| 7079 | |
| 7080 | MOZ_ASSERT(!DebugAPI::inFrameMaps(from))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!DebugAPI::inFrameMaps(from))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!DebugAPI::inFrameMaps(from) ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!DebugAPI::inFrameMaps(from)", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7080); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!DebugAPI::inFrameMaps(from)" ")"); do { *((volatile int*)__null) = 7080; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7081 | MOZ_ASSERT(!DebugAPI::inFrameMaps(to))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!DebugAPI::inFrameMaps(to))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!DebugAPI::inFrameMaps(to))) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!DebugAPI::inFrameMaps(to)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7081); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!DebugAPI::inFrameMaps(to)" ")"); do { *((volatile int*)__null) = 7081; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7082 | }); |
| 7083 | |
| 7084 | // Forward live Debugger.Frame objects. |
| 7085 | Rooted<DebuggerFrameVector> frames(cx); |
| 7086 | if (!getDebuggerFrames(from, &frames)) { |
| 7087 | // An OOM here means that all Debuggers' frame maps still contain |
| 7088 | // entries for 'from' and no entries for 'to'. Since the 'from' frame |
| 7089 | // will be gone, they are removed by terminateDebuggerFramesOnExit |
| 7090 | // above. |
| 7091 | ReportOutOfMemory(cx); |
| 7092 | return false; |
| 7093 | } |
| 7094 | |
| 7095 | for (size_t i = 0; i < frames.length(); i++) { |
| 7096 | Handle<DebuggerFrame*> frameobj = frames[i]; |
| 7097 | Debugger* dbg = frameobj->owner(); |
| 7098 | |
| 7099 | // Update frame object's ScriptFrameIter::data pointer. |
| 7100 | if (!frameobj->replaceFrameIterData(cx, iter)) { |
| 7101 | return false; |
| 7102 | } |
| 7103 | |
| 7104 | // Add the frame object with |to| as key. |
| 7105 | if (!dbg->frames.putNew(to, frameobj)) { |
| 7106 | ReportOutOfMemory(cx); |
| 7107 | return false; |
| 7108 | } |
| 7109 | |
| 7110 | // Remove the old frame entry after all fallible operations are completed |
| 7111 | // so that an OOM will be able to clean up properly. |
| 7112 | dbg->frames.remove(from); |
| 7113 | } |
| 7114 | |
| 7115 | // All frames successfuly replaced, cancel the rollback. |
| 7116 | terminateDebuggerFramesOnExit.release(); |
| 7117 | |
| 7118 | MOZ_ASSERT(!DebugAPI::inFrameMaps(from))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!DebugAPI::inFrameMaps(from))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!DebugAPI::inFrameMaps(from) ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!DebugAPI::inFrameMaps(from)", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7118); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!DebugAPI::inFrameMaps(from)" ")"); do { *((volatile int*)__null) = 7118; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7119 | MOZ_ASSERT_IF(!frames.empty(), DebugAPI::inFrameMaps(to))do { if (!frames.empty()) { do { static_assert( mozilla::detail ::AssertionConditionType<decltype(DebugAPI::inFrameMaps(to ))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(DebugAPI::inFrameMaps(to)))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("DebugAPI::inFrameMaps(to)", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7119); AnnotateMozCrashReason("MOZ_ASSERT" "(" "DebugAPI::inFrameMaps(to)" ")"); do { *((volatile int*)__null) = 7119; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 7120 | return true; |
| 7121 | } |
| 7122 | |
| 7123 | /* static */ |
| 7124 | bool DebugAPI::inFrameMaps(AbstractFramePtr frame) { |
| 7125 | bool foundAny = false; |
| 7126 | JS::AutoAssertNoGC nogc; |
| 7127 | Debugger::forEachOnStackDebuggerFrame( |
| 7128 | frame, nogc, |
| 7129 | [&](Debugger*, DebuggerFrame* frameobj) { foundAny = true; }); |
| 7130 | return foundAny; |
| 7131 | } |
| 7132 | |
| 7133 | /* static */ |
| 7134 | void Debugger::suspendGeneratorDebuggerFrames(JSContext* cx, |
| 7135 | AbstractFramePtr frame) { |
| 7136 | JS::GCContext* gcx = cx->gcContext(); |
| 7137 | JS::AutoAssertNoGC nogc; |
| 7138 | forEachOnStackDebuggerFrame( |
| 7139 | frame, nogc, [&](Debugger* dbg, DebuggerFrame* dbgFrame) { |
| 7140 | dbg->frames.remove(frame); |
| 7141 | |
| 7142 | #if DEBUG1 |
| 7143 | MOZ_ASSERT(dbgFrame->hasGeneratorInfo())do { static_assert( mozilla::detail::AssertionConditionType< decltype(dbgFrame->hasGeneratorInfo())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(dbgFrame->hasGeneratorInfo ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("dbgFrame->hasGeneratorInfo()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7143); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dbgFrame->hasGeneratorInfo()" ")"); do { *((volatile int*)__null) = 7143; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7144 | AbstractGeneratorObject& genObj = dbgFrame->unwrappedGenerator(); |
| 7145 | GeneratorWeakMap::Ptr p = dbg->generatorFrames.lookup(&genObj); |
| 7146 | MOZ_ASSERT(p)do { static_assert( mozilla::detail::AssertionConditionType< decltype(p)>::isValid, "invalid assertion condition"); if ( (__builtin_expect(!!(!(!!(p))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("p", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7146); AnnotateMozCrashReason("MOZ_ASSERT" "(" "p" ")"); do { *((volatile int*)__null) = 7146; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 7147 | MOZ_ASSERT(p->value() == dbgFrame)do { static_assert( mozilla::detail::AssertionConditionType< decltype(p->value() == dbgFrame)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(p->value() == dbgFrame))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("p->value() == dbgFrame" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7147); AnnotateMozCrashReason("MOZ_ASSERT" "(" "p->value() == dbgFrame" ")"); do { *((volatile int*)__null) = 7147; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7148 | #endif |
| 7149 | |
| 7150 | dbgFrame->suspend(gcx); |
| 7151 | }); |
| 7152 | } |
| 7153 | |
| 7154 | /* static */ |
| 7155 | void Debugger::terminateDebuggerFrames(JSContext* cx, AbstractFramePtr frame) { |
| 7156 | JS::GCContext* gcx = cx->gcContext(); |
| 7157 | |
| 7158 | JS::AutoAssertNoGC nogc; |
| 7159 | forEachOnStackOrSuspendedDebuggerFrame( |
| 7160 | cx, frame, nogc, [&](Debugger* dbg, DebuggerFrame* dbgFrame) { |
| 7161 | Debugger::terminateDebuggerFrame(gcx, dbg, dbgFrame, frame); |
| 7162 | }); |
| 7163 | |
| 7164 | // If this is an eval frame, then from the debugger's perspective the |
| 7165 | // script is about to be destroyed. Remove any breakpoints in it. |
| 7166 | if (frame.isEvalFrame()) { |
| 7167 | RootedScript script(cx, frame.script()); |
| 7168 | DebugScript::clearBreakpointsIn(cx->gcContext(), script, nullptr, nullptr); |
| 7169 | } |
| 7170 | } |
| 7171 | |
| 7172 | /* static */ |
| 7173 | void Debugger::terminateDebuggerFrame( |
| 7174 | JS::GCContext* gcx, Debugger* dbg, DebuggerFrame* dbgFrame, |
| 7175 | AbstractFramePtr frame, FrameMap::Enum* maybeFramesEnum, |
| 7176 | GeneratorWeakMap::Enum* maybeGeneratorFramesEnum) { |
| 7177 | // If we were not passed the frame, either we are destroying a frame early |
| 7178 | // on before it was inserted into the "frames" list, or else we are |
| 7179 | // terminating a frame from "generatorFrames" and the "frames" entries will |
| 7180 | // be cleaned up later on with a second call to this function. |
| 7181 | MOZ_ASSERT_IF(!frame, !maybeFramesEnum)do { if (!frame) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(!maybeFramesEnum)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!maybeFramesEnum))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!maybeFramesEnum" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7181); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!maybeFramesEnum" ")"); do { *((volatile int*)__null) = 7181; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 7182 | MOZ_ASSERT_IF(!frame, dbgFrame->hasGeneratorInfo())do { if (!frame) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(dbgFrame->hasGeneratorInfo())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(dbgFrame->hasGeneratorInfo ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("dbgFrame->hasGeneratorInfo()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7182); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dbgFrame->hasGeneratorInfo()" ")"); do { *((volatile int*)__null) = 7182; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 7183 | MOZ_ASSERT_IF(!dbgFrame->hasGeneratorInfo(), !maybeGeneratorFramesEnum)do { if (!dbgFrame->hasGeneratorInfo()) { do { static_assert ( mozilla::detail::AssertionConditionType<decltype(!maybeGeneratorFramesEnum )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!maybeGeneratorFramesEnum))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("!maybeGeneratorFramesEnum", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7183); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!maybeGeneratorFramesEnum" ")"); do { *((volatile int*)__null) = 7183; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 7184 | |
| 7185 | if (frame) { |
| 7186 | if (maybeFramesEnum) { |
| 7187 | maybeFramesEnum->removeFront(); |
| 7188 | } else { |
| 7189 | dbg->frames.remove(frame); |
| 7190 | } |
| 7191 | } |
| 7192 | |
| 7193 | if (dbgFrame->hasGeneratorInfo()) { |
| 7194 | if (maybeGeneratorFramesEnum) { |
| 7195 | maybeGeneratorFramesEnum->removeFront(); |
| 7196 | } else { |
| 7197 | dbg->generatorFrames.remove(&dbgFrame->unwrappedGenerator()); |
| 7198 | } |
| 7199 | } |
| 7200 | |
| 7201 | dbgFrame->terminate(gcx, frame); |
| 7202 | } |
| 7203 | |
| 7204 | DebuggerDebuggeeLink* Debugger::getDebuggeeLink() { |
| 7205 | return &object->getReservedSlot(JSSLOT_DEBUG_DEBUGGEE_LINK) |
| 7206 | .toObject() |
| 7207 | .as<DebuggerDebuggeeLink>(); |
| 7208 | } |
| 7209 | |
| 7210 | void DebuggerDebuggeeLink::setLinkSlot(Debugger& dbg) { |
| 7211 | setReservedSlot(DEBUGGER_LINK_SLOT, ObjectValue(*dbg.toJSObject())); |
| 7212 | } |
| 7213 | |
| 7214 | void DebuggerDebuggeeLink::clearLinkSlot() { |
| 7215 | setReservedSlot(DEBUGGER_LINK_SLOT, UndefinedValue()); |
| 7216 | } |
| 7217 | |
| 7218 | const JSClass DebuggerDebuggeeLink::class_ = { |
| 7219 | "DebuggerDebuggeeLink", |
| 7220 | JSCLASS_HAS_RESERVED_SLOTS(RESERVED_SLOTS), |
| 7221 | }; |
| 7222 | |
| 7223 | /* static */ |
| 7224 | bool DebugAPI::handleBaselineOsr(JSContext* cx, InterpreterFrame* from, |
| 7225 | jit::BaselineFrame* to) { |
| 7226 | ScriptFrameIter iter(cx); |
| 7227 | MOZ_ASSERT(iter.abstractFramePtr() == to)do { static_assert( mozilla::detail::AssertionConditionType< decltype(iter.abstractFramePtr() == to)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(iter.abstractFramePtr() == to ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "iter.abstractFramePtr() == to", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7227); AnnotateMozCrashReason("MOZ_ASSERT" "(" "iter.abstractFramePtr() == to" ")"); do { *((volatile int*)__null) = 7227; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7228 | return Debugger::replaceFrameGuts(cx, from, to, iter); |
| 7229 | } |
| 7230 | |
| 7231 | /* static */ |
| 7232 | bool DebugAPI::handleIonBailout(JSContext* cx, jit::RematerializedFrame* from, |
| 7233 | jit::BaselineFrame* to) { |
| 7234 | // When we return to a bailed-out Ion real frame, we must update all |
| 7235 | // Debugger.Frames that refer to its inline frames. However, since we |
| 7236 | // can't pop individual inline frames off the stack (we can only pop the |
| 7237 | // real frame that contains them all, as a unit), we cannot assume that |
| 7238 | // the frame we're dealing with is the top frame. Advance the iterator |
| 7239 | // across any inlined frames younger than |to|, the baseline frame |
| 7240 | // reconstructed during bailout from the Ion frame corresponding to |
| 7241 | // |from|. |
| 7242 | ScriptFrameIter iter(cx); |
| 7243 | while (iter.abstractFramePtr() != to) { |
| 7244 | ++iter; |
| 7245 | } |
| 7246 | return Debugger::replaceFrameGuts(cx, from, to, iter); |
| 7247 | } |
| 7248 | |
| 7249 | /* static */ |
| 7250 | void DebugAPI::handleUnrecoverableIonBailoutError( |
| 7251 | JSContext* cx, jit::RematerializedFrame* frame) { |
| 7252 | // Ion bailout can fail due to overrecursion. In such cases we cannot |
| 7253 | // honor any further Debugger hooks on the frame, and need to ensure that |
| 7254 | // its Debugger.Frame entry is cleaned up. |
| 7255 | Debugger::terminateDebuggerFrames(cx, frame); |
| 7256 | } |
| 7257 | |
| 7258 | /*** JS::dbg::Builder *******************************************************/ |
| 7259 | |
| 7260 | Builder::Builder(JSContext* cx, js::Debugger* debugger) |
| 7261 | : debuggerObject(cx, debugger->toJSObject().get()), debugger(debugger) {} |
| 7262 | |
| 7263 | #if DEBUG1 |
| 7264 | void Builder::assertBuilt(JSObject* obj) { |
| 7265 | // We can't use assertSameCompartment here, because that is always keyed to |
| 7266 | // some JSContext's current compartment, whereas BuiltThings can be |
| 7267 | // constructed and assigned to without respect to any particular context; |
| 7268 | // the only constraint is that they should be in their debugger's compartment. |
| 7269 | MOZ_ASSERT_IF(obj, debuggerObject->compartment() == obj->compartment())do { if (obj) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(debuggerObject->compartment() == obj->compartment ())>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(debuggerObject->compartment() == obj->compartment ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("debuggerObject->compartment() == obj->compartment()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7269); AnnotateMozCrashReason("MOZ_ASSERT" "(" "debuggerObject->compartment() == obj->compartment()" ")"); do { *((volatile int*)__null) = 7269; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 7270 | } |
| 7271 | #endif |
| 7272 | |
| 7273 | bool Builder::Object::definePropertyToTrusted(JSContext* cx, const char* name, |
| 7274 | JS::MutableHandleValue trusted) { |
| 7275 | // We should have checked for false Objects before calling this. |
| 7276 | MOZ_ASSERT(value)do { static_assert( mozilla::detail::AssertionConditionType< decltype(value)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(value))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("value", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7276); AnnotateMozCrashReason("MOZ_ASSERT" "(" "value" ")") ; do { *((volatile int*)__null) = 7276; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7277 | |
| 7278 | JSAtom* atom = Atomize(cx, name, strlen(name)); |
| 7279 | if (!atom) { |
| 7280 | return false; |
| 7281 | } |
| 7282 | RootedId id(cx, AtomToId(atom)); |
| 7283 | |
| 7284 | return DefineDataProperty(cx, value, id, trusted); |
| 7285 | } |
| 7286 | |
| 7287 | bool Builder::Object::defineProperty(JSContext* cx, const char* name, |
| 7288 | JS::HandleValue propval_) { |
| 7289 | AutoRealm ar(cx, debuggerObject()); |
| 7290 | |
| 7291 | RootedValue propval(cx, propval_); |
| 7292 | if (!debugger()->wrapDebuggeeValue(cx, &propval)) { |
| 7293 | return false; |
| 7294 | } |
| 7295 | |
| 7296 | return definePropertyToTrusted(cx, name, &propval); |
| 7297 | } |
| 7298 | |
| 7299 | bool Builder::Object::defineProperty(JSContext* cx, const char* name, |
| 7300 | JS::HandleObject propval_) { |
| 7301 | RootedValue propval(cx, ObjectOrNullValue(propval_)); |
| 7302 | return defineProperty(cx, name, propval); |
| 7303 | } |
| 7304 | |
| 7305 | bool Builder::Object::defineProperty(JSContext* cx, const char* name, |
| 7306 | Builder::Object& propval_) { |
| 7307 | AutoRealm ar(cx, debuggerObject()); |
| 7308 | |
| 7309 | RootedValue propval(cx, ObjectOrNullValue(propval_.value)); |
| 7310 | return definePropertyToTrusted(cx, name, &propval); |
| 7311 | } |
| 7312 | |
| 7313 | Builder::Object Builder::newObject(JSContext* cx) { |
| 7314 | AutoRealm ar(cx, debuggerObject); |
| 7315 | |
| 7316 | Rooted<PlainObject*> obj(cx, NewPlainObject(cx)); |
| 7317 | |
| 7318 | // If the allocation failed, this will return a false Object, as the spec |
| 7319 | // promises. |
| 7320 | return Object(cx, *this, obj); |
| 7321 | } |
| 7322 | |
| 7323 | /*** Glue *******************************************************************/ |
| 7324 | |
| 7325 | extern JS_PUBLIC_API bool JS_DefineDebuggerObject(JSContext* cx, |
| 7326 | HandleObject obj) { |
| 7327 | Rooted<NativeObject*> debugCtor(cx), debugProto(cx), frameProto(cx), |
| 7328 | scriptProto(cx), sourceProto(cx), objectProto(cx), envProto(cx), |
| 7329 | memoryProto(cx); |
| 7330 | RootedObject debuggeeWouldRunProto(cx); |
| 7331 | RootedValue debuggeeWouldRunCtor(cx); |
| 7332 | Handle<GlobalObject*> global = obj.as<GlobalObject>(); |
| 7333 | |
| 7334 | debugProto = InitClass(cx, global, &DebuggerPrototypeObject::class_, nullptr, |
| 7335 | "Debugger", Debugger::construct, 1, |
| 7336 | Debugger::properties, Debugger::methods, nullptr, |
| 7337 | Debugger::static_methods, debugCtor.address()); |
| 7338 | if (!debugProto) { |
| 7339 | return false; |
| 7340 | } |
| 7341 | |
| 7342 | frameProto = DebuggerFrame::initClass(cx, global, debugCtor); |
| 7343 | if (!frameProto) { |
| 7344 | return false; |
| 7345 | } |
| 7346 | |
| 7347 | scriptProto = DebuggerScript::initClass(cx, global, debugCtor); |
| 7348 | if (!scriptProto) { |
| 7349 | return false; |
| 7350 | } |
| 7351 | |
| 7352 | sourceProto = DebuggerSource::initClass(cx, global, debugCtor); |
| 7353 | if (!sourceProto) { |
| 7354 | return false; |
| 7355 | } |
| 7356 | |
| 7357 | objectProto = DebuggerObject::initClass(cx, global, debugCtor); |
| 7358 | if (!objectProto) { |
| 7359 | return false; |
| 7360 | } |
| 7361 | |
| 7362 | envProto = DebuggerEnvironment::initClass(cx, global, debugCtor); |
| 7363 | if (!envProto) { |
| 7364 | return false; |
| 7365 | } |
| 7366 | |
| 7367 | memoryProto = InitClass( |
| 7368 | cx, debugCtor, nullptr, nullptr, "Memory", DebuggerMemory::construct, 0, |
| 7369 | DebuggerMemory::properties, DebuggerMemory::methods, nullptr, nullptr); |
| 7370 | if (!memoryProto) { |
| 7371 | return false; |
| 7372 | } |
| 7373 | |
| 7374 | debuggeeWouldRunProto = GlobalObject::getOrCreateCustomErrorPrototype( |
| 7375 | cx, global, JSEXN_DEBUGGEEWOULDRUN); |
| 7376 | if (!debuggeeWouldRunProto) { |
| 7377 | return false; |
| 7378 | } |
| 7379 | debuggeeWouldRunCtor = |
| 7380 | ObjectValue(global->getConstructor(JSProto_DebuggeeWouldRun)); |
| 7381 | RootedId debuggeeWouldRunId( |
| 7382 | cx, NameToId(ClassName(JSProto_DebuggeeWouldRun, cx))); |
| 7383 | if (!DefineDataProperty(cx, debugCtor, debuggeeWouldRunId, |
| 7384 | debuggeeWouldRunCtor, 0)) { |
| 7385 | return false; |
| 7386 | } |
| 7387 | |
| 7388 | debugProto->setReservedSlot(Debugger::JSSLOT_DEBUG_FRAME_PROTO, |
| 7389 | ObjectValue(*frameProto)); |
| 7390 | debugProto->setReservedSlot(Debugger::JSSLOT_DEBUG_OBJECT_PROTO, |
| 7391 | ObjectValue(*objectProto)); |
| 7392 | debugProto->setReservedSlot(Debugger::JSSLOT_DEBUG_SCRIPT_PROTO, |
| 7393 | ObjectValue(*scriptProto)); |
| 7394 | debugProto->setReservedSlot(Debugger::JSSLOT_DEBUG_SOURCE_PROTO, |
| 7395 | ObjectValue(*sourceProto)); |
| 7396 | debugProto->setReservedSlot(Debugger::JSSLOT_DEBUG_ENV_PROTO, |
| 7397 | ObjectValue(*envProto)); |
| 7398 | debugProto->setReservedSlot(Debugger::JSSLOT_DEBUG_MEMORY_PROTO, |
| 7399 | ObjectValue(*memoryProto)); |
| 7400 | return true; |
| 7401 | } |
| 7402 | |
| 7403 | JS_PUBLIC_API bool JS::dbg::IsDebugger(JSObject& obj) { |
| 7404 | /* We only care about debugger objects, so CheckedUnwrapStatic is OK. */ |
| 7405 | JSObject* unwrapped = CheckedUnwrapStatic(&obj); |
| 7406 | if (!unwrapped || !unwrapped->is<DebuggerInstanceObject>()) { |
| 7407 | return false; |
| 7408 | } |
| 7409 | MOZ_ASSERT(js::Debugger::fromJSObject(unwrapped))do { static_assert( mozilla::detail::AssertionConditionType< decltype(js::Debugger::fromJSObject(unwrapped))>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(! !(js::Debugger::fromJSObject(unwrapped)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("js::Debugger::fromJSObject(unwrapped)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7409); AnnotateMozCrashReason("MOZ_ASSERT" "(" "js::Debugger::fromJSObject(unwrapped)" ")"); do { *((volatile int*)__null) = 7409; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7410 | return true; |
| 7411 | } |
| 7412 | |
| 7413 | JS_PUBLIC_API bool JS::dbg::GetDebuggeeGlobals( |
| 7414 | JSContext* cx, JSObject& dbgObj, MutableHandleObjectVector vector) { |
| 7415 | MOZ_ASSERT(IsDebugger(dbgObj))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsDebugger(dbgObj))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(IsDebugger(dbgObj)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("IsDebugger(dbgObj)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7415); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsDebugger(dbgObj)" ")"); do { *((volatile int*)__null) = 7415; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7416 | /* Since we know we have a debugger object, CheckedUnwrapStatic is fine. */ |
| 7417 | js::Debugger* dbg = js::Debugger::fromJSObject(CheckedUnwrapStatic(&dbgObj)); |
| 7418 | |
| 7419 | if (!vector.reserve(vector.length() + dbg->debuggees.count())) { |
| 7420 | JS_ReportOutOfMemory(cx); |
| 7421 | return false; |
| 7422 | } |
| 7423 | |
| 7424 | for (WeakGlobalObjectSet::Range r = dbg->allDebuggees(); !r.empty(); |
| 7425 | r.popFront()) { |
| 7426 | vector.infallibleAppend(static_cast<JSObject*>(r.front())); |
| 7427 | } |
| 7428 | |
| 7429 | return true; |
| 7430 | } |
| 7431 | |
| 7432 | #ifdef DEBUG1 |
| 7433 | /* static */ |
| 7434 | bool Debugger::isDebuggerCrossCompartmentEdge(JSObject* obj, |
| 7435 | const gc::Cell* target) { |
| 7436 | MOZ_ASSERT(target)do { static_assert( mozilla::detail::AssertionConditionType< decltype(target)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(target))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("target", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7436); AnnotateMozCrashReason("MOZ_ASSERT" "(" "target" ")" ); do { *((volatile int*)__null) = 7436; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7437 | |
| 7438 | const gc::Cell* referent = nullptr; |
| 7439 | if (obj->is<DebuggerScript>()) { |
| 7440 | referent = obj->as<DebuggerScript>().getReferentCell(); |
| 7441 | } else if (obj->is<DebuggerSource>()) { |
| 7442 | referent = obj->as<DebuggerSource>().getReferentRawObject(); |
| 7443 | } else if (obj->is<DebuggerObject>()) { |
| 7444 | referent = obj->as<DebuggerObject>().referent(); |
| 7445 | } else if (obj->is<DebuggerEnvironment>()) { |
| 7446 | referent = obj->as<DebuggerEnvironment>().referent(); |
| 7447 | } |
| 7448 | |
| 7449 | return referent == target; |
| 7450 | } |
| 7451 | |
| 7452 | static void CheckDebuggeeThingRealm(Realm* realm, bool invisibleOk) { |
| 7453 | MOZ_ASSERT_IF(!invisibleOk, !realm->creationOptions().invisibleToDebugger())do { if (!invisibleOk) { do { static_assert( mozilla::detail:: AssertionConditionType<decltype(!realm->creationOptions ().invisibleToDebugger())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!realm->creationOptions() .invisibleToDebugger()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!realm->creationOptions().invisibleToDebugger()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7453); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!realm->creationOptions().invisibleToDebugger()" ")"); do { *((volatile int*)__null) = 7453; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 7454 | } |
| 7455 | |
| 7456 | void js::CheckDebuggeeThing(BaseScript* script, bool invisibleOk) { |
| 7457 | CheckDebuggeeThingRealm(script->realm(), invisibleOk); |
| 7458 | } |
| 7459 | |
| 7460 | void js::CheckDebuggeeThing(JSObject* obj, bool invisibleOk) { |
| 7461 | if (Realm* realm = JS::GetObjectRealmOrNull(obj)) { |
| 7462 | CheckDebuggeeThingRealm(realm, invisibleOk); |
| 7463 | } |
| 7464 | } |
| 7465 | #endif // DEBUG |
| 7466 | |
| 7467 | /*** JS::dbg::GarbageCollectionEvent ****************************************/ |
| 7468 | |
| 7469 | namespace JS { |
| 7470 | namespace dbg { |
| 7471 | |
| 7472 | /* static */ GarbageCollectionEvent::Ptr GarbageCollectionEvent::Create( |
| 7473 | JSRuntime* rt, ::js::gcstats::Statistics& stats, uint64_t gcNumber) { |
| 7474 | auto data = MakeUnique<GarbageCollectionEvent>(gcNumber); |
| 7475 | if (!data) { |
| 7476 | return nullptr; |
| 7477 | } |
| 7478 | |
| 7479 | data->nonincrementalReason = stats.nonincrementalReason(); |
| 7480 | |
| 7481 | for (auto& slice : stats.slices()) { |
| 7482 | if (!data->reason) { |
| 7483 | // There is only one GC reason for the whole cycle, but for legacy |
| 7484 | // reasons this data is stored and replicated on each slice. Each |
| 7485 | // slice used to have its own GCReason, but now they are all the |
| 7486 | // same. |
| 7487 | data->reason = ExplainGCReason(slice.reason); |
| 7488 | MOZ_ASSERT(data->reason)do { static_assert( mozilla::detail::AssertionConditionType< decltype(data->reason)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(data->reason))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("data->reason" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7488); AnnotateMozCrashReason("MOZ_ASSERT" "(" "data->reason" ")"); do { *((volatile int*)__null) = 7488; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7489 | } |
| 7490 | |
| 7491 | if (!data->collections.growBy(1)) { |
| 7492 | return nullptr; |
| 7493 | } |
| 7494 | |
| 7495 | data->collections.back().startTimestamp = slice.start; |
| 7496 | data->collections.back().endTimestamp = slice.end; |
| 7497 | } |
| 7498 | |
| 7499 | return data; |
| 7500 | } |
| 7501 | |
| 7502 | static bool DefineStringProperty(JSContext* cx, HandleObject obj, |
| 7503 | PropertyName* propName, const char* strVal) { |
| 7504 | RootedValue val(cx, UndefinedValue()); |
| 7505 | if (strVal) { |
| 7506 | JSAtom* atomized = Atomize(cx, strVal, strlen(strVal)); |
| 7507 | if (!atomized) { |
| 7508 | return false; |
| 7509 | } |
| 7510 | val = StringValue(atomized); |
| 7511 | } |
| 7512 | return DefineDataProperty(cx, obj, propName, val); |
| 7513 | } |
| 7514 | |
| 7515 | JSObject* GarbageCollectionEvent::toJSObject(JSContext* cx) const { |
| 7516 | RootedObject obj(cx, NewPlainObject(cx)); |
| 7517 | RootedValue gcCycleNumberVal(cx, NumberValue(majorGCNumber_)); |
| 7518 | if (!obj || |
| 7519 | !DefineStringProperty(cx, obj, cx->names().nonincrementalReason, |
| 7520 | nonincrementalReason) || |
| 7521 | !DefineStringProperty(cx, obj, cx->names().reason, reason) || |
| 7522 | !DefineDataProperty(cx, obj, cx->names().gcCycleNumber, |
| 7523 | gcCycleNumberVal)) { |
| 7524 | return nullptr; |
| 7525 | } |
| 7526 | |
| 7527 | Rooted<ArrayObject*> slicesArray(cx, NewDenseEmptyArray(cx)); |
| 7528 | if (!slicesArray) { |
| 7529 | return nullptr; |
| 7530 | } |
| 7531 | |
| 7532 | TimeStamp originTime = TimeStamp::ProcessCreation(); |
| 7533 | |
| 7534 | size_t idx = 0; |
| 7535 | for (auto range = collections.all(); !range.empty(); range.popFront()) { |
| 7536 | Rooted<PlainObject*> collectionObj(cx, NewPlainObject(cx)); |
| 7537 | if (!collectionObj) { |
| 7538 | return nullptr; |
| 7539 | } |
| 7540 | |
| 7541 | RootedValue start(cx), end(cx); |
| 7542 | start = NumberValue( |
| 7543 | (range.front().startTimestamp - originTime).ToMilliseconds()); |
| 7544 | end = |
| 7545 | NumberValue((range.front().endTimestamp - originTime).ToMilliseconds()); |
| 7546 | if (!DefineDataProperty(cx, collectionObj, cx->names().startTimestamp, |
| 7547 | start) || |
| 7548 | !DefineDataProperty(cx, collectionObj, cx->names().endTimestamp, end)) { |
| 7549 | return nullptr; |
| 7550 | } |
| 7551 | |
| 7552 | RootedValue collectionVal(cx, ObjectValue(*collectionObj)); |
| 7553 | if (!DefineDataElement(cx, slicesArray, idx++, collectionVal)) { |
| 7554 | return nullptr; |
| 7555 | } |
| 7556 | } |
| 7557 | |
| 7558 | RootedValue slicesValue(cx, ObjectValue(*slicesArray)); |
| 7559 | if (!DefineDataProperty(cx, obj, cx->names().collections, slicesValue)) { |
| 7560 | return nullptr; |
| 7561 | } |
| 7562 | |
| 7563 | return obj; |
| 7564 | } |
| 7565 | |
| 7566 | JS_PUBLIC_API bool FireOnGarbageCollectionHookRequired(JSContext* cx) { |
| 7567 | AutoCheckCannotGC noGC; |
| 7568 | |
| 7569 | for (auto& dbg : cx->runtime()->onGarbageCollectionWatchers()) { |
| 7570 | MOZ_ASSERT(dbg.getHook(Debugger::OnGarbageCollection))do { static_assert( mozilla::detail::AssertionConditionType< decltype(dbg.getHook(Debugger::OnGarbageCollection))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(dbg.getHook(Debugger::OnGarbageCollection)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("dbg.getHook(Debugger::OnGarbageCollection)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7570); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dbg.getHook(Debugger::OnGarbageCollection)" ")"); do { *((volatile int*)__null) = 7570; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7571 | if (dbg.observedGC(cx->runtime()->gc.majorGCCount())) { |
| 7572 | return true; |
| 7573 | } |
| 7574 | } |
| 7575 | |
| 7576 | return false; |
| 7577 | } |
| 7578 | |
| 7579 | JS_PUBLIC_API bool FireOnGarbageCollectionHook( |
| 7580 | JSContext* cx, JS::dbg::GarbageCollectionEvent::Ptr&& data) { |
| 7581 | RootedObjectVector triggered(cx); |
| 7582 | |
| 7583 | { |
| 7584 | // We had better not GC (and potentially get a dangling Debugger |
| 7585 | // pointer) while finding all Debuggers observing a debuggee that |
| 7586 | // participated in this GC. |
| 7587 | AutoCheckCannotGC noGC; |
| 7588 | |
| 7589 | for (auto& dbg : cx->runtime()->onGarbageCollectionWatchers()) { |
| 7590 | MOZ_ASSERT(dbg.getHook(Debugger::OnGarbageCollection))do { static_assert( mozilla::detail::AssertionConditionType< decltype(dbg.getHook(Debugger::OnGarbageCollection))>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(dbg.getHook(Debugger::OnGarbageCollection)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("dbg.getHook(Debugger::OnGarbageCollection)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7590); AnnotateMozCrashReason("MOZ_ASSERT" "(" "dbg.getHook(Debugger::OnGarbageCollection)" ")"); do { *((volatile int*)__null) = 7590; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7591 | if (dbg.observedGC(data->majorGCNumber())) { |
| 7592 | if (!triggered.append(dbg.object)) { |
| 7593 | JS_ReportOutOfMemory(cx); |
| 7594 | return false; |
| 7595 | } |
| 7596 | } |
| 7597 | } |
| 7598 | } |
| 7599 | |
| 7600 | for (; !triggered.empty(); triggered.popBack()) { |
| 7601 | Debugger* dbg = Debugger::fromJSObject(triggered.back()); |
| 7602 | |
| 7603 | if (dbg->getHook(Debugger::OnGarbageCollection)) { |
| 7604 | (void)dbg->enterDebuggerHook(cx, [&]() -> bool { |
| 7605 | return dbg->fireOnGarbageCollectionHook(cx, data); |
| 7606 | }); |
| 7607 | MOZ_ASSERT(!cx->isExceptionPending())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!cx->isExceptionPending())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!cx->isExceptionPending() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "!cx->isExceptionPending()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/debugger/Debugger.cpp" , 7607); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!cx->isExceptionPending()" ")"); do { *((volatile int*)__null) = 7607; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 7608 | } |
| 7609 | } |
| 7610 | |
| 7611 | return true; |
| 7612 | } |
| 7613 | |
| 7614 | bool ShouldAvoidSideEffects(JSContext* cx) { |
| 7615 | return DebugAPI::shouldAvoidSideEffects(cx); |
| 7616 | } |
| 7617 | |
| 7618 | } // namespace dbg |
| 7619 | } // namespace JS |