| File: | var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp |
| Warning: | line 1193, column 5 Value stored to 'funcBytecodeOffset' is never read |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
| 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 | * |
| 4 | * Copyright 2016 Mozilla Foundation |
| 5 | * |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | */ |
| 18 | |
| 19 | #include "wasm/WasmPI.h" |
| 20 | |
| 21 | #include "builtin/Promise.h" |
| 22 | #include "debugger/DebugAPI.h" |
| 23 | #include "debugger/Debugger.h" |
| 24 | #include "jit/arm/Simulator-arm.h" |
| 25 | #include "jit/JitRuntime.h" |
| 26 | #include "jit/MIRGenerator.h" |
| 27 | #include "js/CallAndConstruct.h" |
| 28 | #include "js/Printf.h" |
| 29 | #include "vm/Iteration.h" |
| 30 | #include "vm/JSContext.h" |
| 31 | #include "vm/JSObject.h" |
| 32 | #include "vm/NativeObject.h" |
| 33 | #include "vm/PromiseObject.h" |
| 34 | #include "wasm/WasmConstants.h" |
| 35 | #include "wasm/WasmContext.h" |
| 36 | #include "wasm/WasmFeatures.h" |
| 37 | #include "wasm/WasmGenerator.h" |
| 38 | #include "wasm/WasmIonCompile.h" // IonPlatformSupport |
| 39 | #include "wasm/WasmValidate.h" |
| 40 | |
| 41 | #include "vm/JSObject-inl.h" |
| 42 | #include "wasm/WasmGcObject-inl.h" |
| 43 | #include "wasm/WasmInstance-inl.h" |
| 44 | |
| 45 | #ifdef JS_CODEGEN_ARM64 |
| 46 | # include "jit/arm64/vixl/Simulator-vixl.h" |
| 47 | #endif |
| 48 | |
| 49 | #ifdef XP_WIN |
| 50 | # include "util/WindowsWrapper.h" |
| 51 | #endif |
| 52 | |
| 53 | using namespace js; |
| 54 | using namespace js::jit; |
| 55 | |
| 56 | #ifdef ENABLE_WASM_JSPI1 |
| 57 | namespace js::wasm { |
| 58 | |
| 59 | SuspenderObjectData::SuspenderObjectData(void* stackMemory) |
| 60 | : stackMemory_(stackMemory), |
| 61 | suspendableFP_(nullptr), |
| 62 | suspendableSP_(static_cast<uint8_t*>(stackMemory) + |
| 63 | SuspendableStackPlusRedZoneSize), |
| 64 | state_(SuspenderState::Initial), |
| 65 | suspendedBy_(nullptr) {} |
| 66 | |
| 67 | void SuspenderObjectData::releaseStackMemory() { |
| 68 | js_free(stackMemory_); |
| 69 | stackMemory_ = nullptr; |
| 70 | } |
| 71 | |
| 72 | # if defined(_WIN32) |
| 73 | // On WIN64, the Thread Information Block stack limits has to be modified to |
| 74 | // avoid failures on SP checks. |
| 75 | void SuspenderObjectData::updateTIBStackFields() { |
| 76 | _NT_TIB* tib = reinterpret_cast<_NT_TIB*>(::NtCurrentTeb()); |
| 77 | savedStackBase_ = tib->StackBase; |
| 78 | savedStackLimit_ = tib->StackLimit; |
| 79 | uintptr_t stack_limit = (uintptr_t)stackMemory_; |
| 80 | uintptr_t stack_base = stack_limit + SuspendableStackPlusRedZoneSize; |
| 81 | tib->StackBase = (void*)stack_base; |
| 82 | tib->StackLimit = (void*)stack_limit; |
| 83 | } |
| 84 | |
| 85 | void SuspenderObjectData::restoreTIBStackFields() { |
| 86 | _NT_TIB* tib = reinterpret_cast<_NT_TIB*>(::NtCurrentTeb()); |
| 87 | tib->StackBase = savedStackBase_; |
| 88 | tib->StackLimit = savedStackLimit_; |
| 89 | } |
| 90 | # endif |
| 91 | |
| 92 | # ifdef JS_SIMULATOR_ARM64 |
| 93 | void SuspenderObjectData::switchSimulatorToMain() { |
| 94 | auto* sim = Simulator::Current(); |
| 95 | suspendableSP_ = (void*)sim->xreg(Registers::sp, vixl::Reg31IsStackPointer); |
| 96 | suspendableFP_ = (void*)sim->xreg(Registers::fp); |
| 97 | sim->set_xreg(Registers::sp, (int64_t)mainSP_, vixl::Debugger::LogRegWrites, |
| 98 | vixl::Reg31IsStackPointer); |
| 99 | sim->set_xreg(Registers::fp, (int64_t)mainFP_); |
| 100 | } |
| 101 | |
| 102 | void SuspenderObjectData::switchSimulatorToSuspendable() { |
| 103 | auto* sim = Simulator::Current(); |
| 104 | mainSP_ = (void*)sim->xreg(Registers::sp, vixl::Reg31IsStackPointer); |
| 105 | mainFP_ = (void*)sim->xreg(Registers::fp); |
| 106 | sim->set_xreg(Registers::sp, (int64_t)suspendableSP_, |
| 107 | vixl::Debugger::LogRegWrites, vixl::Reg31IsStackPointer); |
| 108 | sim->set_xreg(Registers::fp, (int64_t)suspendableFP_); |
| 109 | } |
| 110 | # endif |
| 111 | |
| 112 | # ifdef JS_SIMULATOR_ARM |
| 113 | void SuspenderObjectData::switchSimulatorToMain() { |
| 114 | suspendableSP_ = (void*)Simulator::Current()->get_register(Simulator::sp); |
| 115 | suspendableFP_ = (void*)Simulator::Current()->get_register(Simulator::fp); |
| 116 | Simulator::Current()->set_register(Simulator::sp, (int)mainSP_); |
| 117 | Simulator::Current()->set_register(Simulator::fp, (int)mainFP_); |
| 118 | } |
| 119 | |
| 120 | void SuspenderObjectData::switchSimulatorToSuspendable() { |
| 121 | mainSP_ = (void*)Simulator::Current()->get_register(Simulator::sp); |
| 122 | mainFP_ = (void*)Simulator::Current()->get_register(Simulator::fp); |
| 123 | Simulator::Current()->set_register(Simulator::sp, (int)suspendableSP_); |
| 124 | Simulator::Current()->set_register(Simulator::fp, (int)suspendableFP_); |
| 125 | } |
| 126 | # endif |
| 127 | |
| 128 | // Slots that used in various JSFunctionExtended below. |
| 129 | const size_t SUSPENDER_SLOT = 0; |
| 130 | const size_t WRAPPED_FN_SLOT = 1; |
| 131 | const size_t CONTINUE_ON_SUSPENDABLE_SLOT = 1; |
| 132 | const size_t PROMISE_SLOT = 2; |
| 133 | |
| 134 | SuspenderContext::SuspenderContext() |
| 135 | : activeSuspender_(nullptr), suspendedStacks_() {} |
| 136 | |
| 137 | SuspenderContext::~SuspenderContext() { |
| 138 | MOZ_ASSERT(activeSuspender_ == nullptr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(activeSuspender_ == nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(activeSuspender_ == nullptr) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("activeSuspender_ == nullptr" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 138); AnnotateMozCrashReason("MOZ_ASSERT" "(" "activeSuspender_ == nullptr" ")"); do { *((volatile int*)__null) = 138; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 139 | MOZ_ASSERT(suspendedStacks_.isEmpty())do { static_assert( mozilla::detail::AssertionConditionType< decltype(suspendedStacks_.isEmpty())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(suspendedStacks_.isEmpty())) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("suspendedStacks_.isEmpty()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 139); AnnotateMozCrashReason("MOZ_ASSERT" "(" "suspendedStacks_.isEmpty()" ")"); do { *((volatile int*)__null) = 139; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 140 | } |
| 141 | |
| 142 | SuspenderObject* SuspenderContext::activeSuspender() { |
| 143 | return activeSuspender_; |
| 144 | } |
| 145 | |
| 146 | void SuspenderContext::setActiveSuspender(SuspenderObject* obj) { |
| 147 | activeSuspender_.set(obj); |
| 148 | } |
| 149 | |
| 150 | void SuspenderContext::trace(JSTracer* trc) { |
| 151 | if (activeSuspender_) { |
| 152 | TraceEdge(trc, &activeSuspender_, "suspender"); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | static void TraceSuspendableStack(JSTracer* trc, |
| 157 | const SuspenderObjectData& data) { |
| 158 | void* startFP = data.suspendableFP(); |
| 159 | void* returnAddress = data.suspendedReturnAddress(); |
| 160 | void* exitFP = data.suspendableExitFP(); |
| 161 | MOZ_ASSERT(startFP != exitFP)do { static_assert( mozilla::detail::AssertionConditionType< decltype(startFP != exitFP)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(startFP != exitFP))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("startFP != exitFP" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 161); AnnotateMozCrashReason("MOZ_ASSERT" "(" "startFP != exitFP" ")"); do { *((volatile int*)__null) = 161; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 162 | |
| 163 | WasmFrameIter iter(static_cast<FrameWithInstances*>(startFP), returnAddress); |
| 164 | MOZ_ASSERT(iter.currentFrameStackSwitched())do { static_assert( mozilla::detail::AssertionConditionType< decltype(iter.currentFrameStackSwitched())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(iter.currentFrameStackSwitched ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("iter.currentFrameStackSwitched()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 164); AnnotateMozCrashReason("MOZ_ASSERT" "(" "iter.currentFrameStackSwitched()" ")"); do { *((volatile int*)__null) = 164; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 165 | uintptr_t highestByteVisitedInPrevWasmFrame = 0; |
| 166 | while (true) { |
| 167 | MOZ_ASSERT(!iter.done())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!iter.done())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!iter.done()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!iter.done()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 167); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!iter.done()" ")"); do { *((volatile int*)__null) = 167; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 168 | uint8_t* nextPC = iter.resumePCinCurrentFrame(); |
| 169 | Instance* instance = iter.instance(); |
| 170 | TraceInstanceEdge(trc, instance, "WasmFrameIter instance"); |
| 171 | highestByteVisitedInPrevWasmFrame = instance->traceFrame( |
| 172 | trc, iter, nextPC, highestByteVisitedInPrevWasmFrame); |
| 173 | if (iter.frame() == exitFP) { |
| 174 | break; |
| 175 | } |
| 176 | ++iter; |
| 177 | if (iter.currentFrameStackSwitched()) { |
| 178 | highestByteVisitedInPrevWasmFrame = 0; |
| 179 | } |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | void SuspenderContext::traceRoots(JSTracer* trc) { |
| 184 | // The suspendedStacks_ contains suspended stacks frames that need to be |
| 185 | // traced only during minor GC. The major GC tracing is happening via |
| 186 | // SuspenderObject::trace. |
| 187 | // Non-suspended stack frames are traced as part of TraceJitActivations. |
| 188 | if (!trc->isTenuringTracer()) { |
| 189 | return; |
| 190 | } |
| 191 | gc::AssertRootMarkingPhase(trc); |
| 192 | for (const SuspenderObjectData& data : suspendedStacks_) { |
| 193 | TraceSuspendableStack(trc, data); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | static_assert(JS_STACK_GROWTH_DIRECTION(-1) < 0, |
| 198 | "JS-PI implemented only for native stacks that grows towards 0"); |
| 199 | |
| 200 | static void DecrementSuspendableStacksCount(JSContext* cx) { |
| 201 | for (;;) { |
| 202 | uint32_t currentCount = cx->wasm().suspendableStacksCount; |
| 203 | MOZ_ASSERT(currentCount > 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype(currentCount > 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(currentCount > 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("currentCount > 0" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 203); AnnotateMozCrashReason("MOZ_ASSERT" "(" "currentCount > 0" ")"); do { *((volatile int*)__null) = 203; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 204 | if (cx->wasm().suspendableStacksCount.compareExchange(currentCount, |
| 205 | currentCount - 1)) { |
| 206 | break; |
| 207 | } |
| 208 | // Failed to decrement suspendableStacksCount, repeat. |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | class SuspenderObject : public NativeObject { |
| 213 | public: |
| 214 | static const JSClass class_; |
| 215 | |
| 216 | enum { DataSlot, PromisingPromiseSlot, SuspendingReturnTypeSlot, SlotCount }; |
| 217 | |
| 218 | enum class ReturnType : int32_t { Unknown, Promise, Value, Exception }; |
| 219 | |
| 220 | static SuspenderObject* create(JSContext* cx) { |
| 221 | for (;;) { |
| 222 | uint32_t currentCount = cx->wasm().suspendableStacksCount; |
| 223 | if (currentCount >= SuspendableStacksMaxCount) { |
| 224 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 225 | JSMSG_JSPI_SUSPENDER_LIMIT); |
| 226 | return nullptr; |
| 227 | } |
| 228 | if (cx->wasm().suspendableStacksCount.compareExchange(currentCount, |
| 229 | currentCount + 1)) { |
| 230 | break; |
| 231 | } |
| 232 | // Failed to increment suspendableStacksCount, repeat. |
| 233 | } |
| 234 | |
| 235 | Rooted<SuspenderObject*> suspender( |
| 236 | cx, NewBuiltinClassInstance<SuspenderObject>(cx)); |
| 237 | if (!suspender) { |
| 238 | DecrementSuspendableStacksCount(cx); |
| 239 | return nullptr; |
| 240 | } |
| 241 | |
| 242 | void* stackMemory = js_malloc(SuspendableStackPlusRedZoneSize); |
| 243 | if (!stackMemory) { |
| 244 | DecrementSuspendableStacksCount(cx); |
| 245 | ReportOutOfMemory(cx); |
| 246 | return nullptr; |
| 247 | } |
| 248 | |
| 249 | SuspenderObjectData* data = js_new<SuspenderObjectData>(stackMemory); |
| 250 | if (!data) { |
| 251 | js_free(stackMemory); |
| 252 | DecrementSuspendableStacksCount(cx); |
| 253 | ReportOutOfMemory(cx); |
| 254 | return nullptr; |
| 255 | } |
| 256 | MOZ_RELEASE_ASSERT(data->state() != SuspenderState::Moribund)do { static_assert( mozilla::detail::AssertionConditionType< decltype(data->state() != SuspenderState::Moribund)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(data->state() != SuspenderState::Moribund))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("data->state() != SuspenderState::Moribund" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 256); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "data->state() != SuspenderState::Moribund" ")"); do { *((volatile int*)__null) = 256; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 257 | |
| 258 | suspender->initReservedSlot(DataSlot, PrivateValue(data)); |
| 259 | suspender->initReservedSlot(PromisingPromiseSlot, NullValue()); |
| 260 | suspender->initReservedSlot(SuspendingReturnTypeSlot, |
| 261 | Int32Value(int32_t(ReturnType::Unknown))); |
| 262 | return suspender; |
| 263 | } |
| 264 | |
| 265 | PromiseObject* promisingPromise() const { |
| 266 | return &getReservedSlot(PromisingPromiseSlot) |
| 267 | .toObject() |
| 268 | .as<PromiseObject>(); |
| 269 | } |
| 270 | |
| 271 | void setPromisingPromise(Handle<PromiseObject*> promise) { |
| 272 | setReservedSlot(PromisingPromiseSlot, ObjectOrNullValue(promise)); |
| 273 | } |
| 274 | |
| 275 | ReturnType suspendingReturnType() const { |
| 276 | return ReturnType(getReservedSlot(SuspendingReturnTypeSlot).toInt32()); |
| 277 | } |
| 278 | |
| 279 | void setSuspendingReturnType(ReturnType type) { |
| 280 | // The SuspendingReturnTypeSlot will change after result is defined, |
| 281 | // and becomes invalid after GetSuspendingPromiseResult. The assert is |
| 282 | // checking if the result was processed by GetSuspendingPromiseResult. |
| 283 | MOZ_ASSERT((type == ReturnType::Unknown) !=do { static_assert( mozilla::detail::AssertionConditionType< decltype((type == ReturnType::Unknown) != (suspendingReturnType () == ReturnType::Unknown))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!((type == ReturnType::Unknown ) != (suspendingReturnType() == ReturnType::Unknown)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("(type == ReturnType::Unknown) != (suspendingReturnType() == ReturnType::Unknown)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 284); AnnotateMozCrashReason("MOZ_ASSERT" "(" "(type == ReturnType::Unknown) != (suspendingReturnType() == ReturnType::Unknown)" ")"); do { *((volatile int*)__null) = 284; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 284 | (suspendingReturnType() == ReturnType::Unknown))do { static_assert( mozilla::detail::AssertionConditionType< decltype((type == ReturnType::Unknown) != (suspendingReturnType () == ReturnType::Unknown))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!((type == ReturnType::Unknown ) != (suspendingReturnType() == ReturnType::Unknown)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("(type == ReturnType::Unknown) != (suspendingReturnType() == ReturnType::Unknown)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 284); AnnotateMozCrashReason("MOZ_ASSERT" "(" "(type == ReturnType::Unknown) != (suspendingReturnType() == ReturnType::Unknown)" ")"); do { *((volatile int*)__null) = 284; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 285 | |
| 286 | setReservedSlot(SuspendingReturnTypeSlot, Int32Value(int32_t(type))); |
| 287 | } |
| 288 | |
| 289 | JS::NativeStackLimit getStackMemoryLimit() { |
| 290 | return JS::NativeStackLimit(data()->stackMemory()) + SuspendableRedZoneSize; |
| 291 | } |
| 292 | |
| 293 | SuspenderState state() { return data()->state(); } |
| 294 | |
| 295 | inline bool hasData() { return !getReservedSlot(DataSlot).isUndefined(); } |
| 296 | |
| 297 | inline SuspenderObjectData* data() { |
| 298 | return static_cast<SuspenderObjectData*>( |
| 299 | getReservedSlot(DataSlot).toPrivate()); |
| 300 | } |
| 301 | |
| 302 | void setMoribund(JSContext* cx); |
| 303 | void setActive(JSContext* cx); |
| 304 | void setSuspended(JSContext* cx); |
| 305 | |
| 306 | void enter(JSContext* cx); |
| 307 | void suspend(JSContext* cx); |
| 308 | void resume(JSContext* cx); |
| 309 | void leave(JSContext* cx); |
| 310 | |
| 311 | // Modifies frames to inject the suspendable stack back into the main one. |
| 312 | void forwardToSuspendable(); |
| 313 | |
| 314 | private: |
| 315 | static const JSClassOps classOps_; |
| 316 | |
| 317 | static void finalize(JS::GCContext* gcx, JSObject* obj); |
| 318 | static void trace(JSTracer* trc, JSObject* obj); |
| 319 | }; |
| 320 | |
| 321 | static_assert(SuspenderObjectDataSlot == SuspenderObject::DataSlot); |
| 322 | |
| 323 | const JSClass SuspenderObject::class_ = { |
| 324 | "SuspenderObject", |
| 325 | JSCLASS_HAS_RESERVED_SLOTS(SlotCount) | JSCLASS_FOREGROUND_FINALIZE, |
| 326 | &SuspenderObject::classOps_, |
| 327 | }; |
| 328 | |
| 329 | const JSClassOps SuspenderObject::classOps_ = { |
| 330 | nullptr, // addProperty |
| 331 | nullptr, // delProperty |
| 332 | nullptr, // enumerate |
| 333 | nullptr, // newEnumerate |
| 334 | nullptr, // resolve |
| 335 | nullptr, // mayResolve |
| 336 | finalize, // finalize |
| 337 | nullptr, // call |
| 338 | nullptr, // construct |
| 339 | trace, // trace |
| 340 | }; |
| 341 | |
| 342 | /* static */ |
| 343 | void SuspenderObject::finalize(JS::GCContext* gcx, JSObject* obj) { |
| 344 | SuspenderObject& suspender = obj->as<SuspenderObject>(); |
| 345 | if (!suspender.hasData()) { |
| 346 | return; |
| 347 | } |
| 348 | SuspenderObjectData* data = suspender.data(); |
| 349 | if (data->state() == SuspenderState::Moribund) { |
| 350 | MOZ_RELEASE_ASSERT(!data->stackMemory())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!data->stackMemory())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!data->stackMemory()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("!data->stackMemory()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 350); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "!data->stackMemory()" ")"); do { *((volatile int*)__null) = 350; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 351 | } else { |
| 352 | // Cleaning stack memory and removing from suspendableStacks_. |
| 353 | data->releaseStackMemory(); |
| 354 | if (SuspenderContext* scx = data->suspendedBy()) { |
| 355 | scx->suspendedStacks_.remove(data); |
| 356 | } |
| 357 | } |
| 358 | js_free(data); |
| 359 | } |
| 360 | |
| 361 | /* static */ |
| 362 | void SuspenderObject::trace(JSTracer* trc, JSObject* obj) { |
| 363 | SuspenderObject& suspender = obj->as<SuspenderObject>(); |
| 364 | if (!suspender.hasData()) { |
| 365 | return; |
| 366 | } |
| 367 | SuspenderObjectData& data = *suspender.data(); |
| 368 | // The SuspenderObjectData refers stacks frames that need to be traced |
| 369 | // only during major GC to determine if SuspenderObject content is |
| 370 | // reachable from JS. The frames must be suspended -- non-suspended |
| 371 | // stack frames are traced as part of TraceJitActivations. |
| 372 | if (!data.traceable() || trc->isTenuringTracer()) { |
| 373 | return; |
| 374 | } |
| 375 | TraceSuspendableStack(trc, data); |
| 376 | } |
| 377 | |
| 378 | void SuspenderObject::setMoribund(JSContext* cx) { |
| 379 | MOZ_ASSERT(state() == SuspenderState::Active)do { static_assert( mozilla::detail::AssertionConditionType< decltype(state() == SuspenderState::Active)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(state() == SuspenderState::Active ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "state() == SuspenderState::Active", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 379); AnnotateMozCrashReason("MOZ_ASSERT" "(" "state() == SuspenderState::Active" ")"); do { *((volatile int*)__null) = 379; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 380 | ResetInstanceStackLimits(cx); |
| 381 | # if defined(_WIN32) |
| 382 | data()->restoreTIBStackFields(); |
| 383 | # endif |
| 384 | SuspenderObjectData* data = this->data(); |
| 385 | data->setState(SuspenderState::Moribund); |
| 386 | data->releaseStackMemory(); |
| 387 | DecrementSuspendableStacksCount(cx); |
| 388 | MOZ_ASSERT(do { static_assert( mozilla::detail::AssertionConditionType< decltype(!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList ( data))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList ( data)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList( data)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 390); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList( data)" ")"); do { *((volatile int*)__null) = 390; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 389 | !cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList(do { static_assert( mozilla::detail::AssertionConditionType< decltype(!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList ( data))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList ( data)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList( data)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 390); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList( data)" ")"); do { *((volatile int*)__null) = 390; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 390 | data))do { static_assert( mozilla::detail::AssertionConditionType< decltype(!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList ( data))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList ( data)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList( data)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 390); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!cx->wasm().promiseIntegration.suspendedStacks_.ElementProbablyInList( data)" ")"); do { *((volatile int*)__null) = 390; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 391 | } |
| 392 | |
| 393 | void SuspenderObject::setActive(JSContext* cx) { |
| 394 | data()->setState(SuspenderState::Active); |
| 395 | UpdateInstanceStackLimitsForSuspendableStack(cx, getStackMemoryLimit()); |
| 396 | # if defined(_WIN32) |
| 397 | data()->updateTIBStackFields(); |
| 398 | # endif |
| 399 | } |
| 400 | |
| 401 | void SuspenderObject::setSuspended(JSContext* cx) { |
| 402 | data()->setState(SuspenderState::Suspended); |
| 403 | ResetInstanceStackLimits(cx); |
| 404 | # if defined(_WIN32) |
| 405 | data()->restoreTIBStackFields(); |
| 406 | # endif |
| 407 | } |
| 408 | |
| 409 | void SuspenderObject::enter(JSContext* cx) { |
| 410 | MOZ_ASSERT(state() == SuspenderState::Initial)do { static_assert( mozilla::detail::AssertionConditionType< decltype(state() == SuspenderState::Initial)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(state() == SuspenderState::Initial ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "state() == SuspenderState::Initial", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 410); AnnotateMozCrashReason("MOZ_ASSERT" "(" "state() == SuspenderState::Initial" ")"); do { *((volatile int*)__null) = 410; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 411 | cx->wasm().promiseIntegration.setActiveSuspender(this); |
| 412 | setActive(cx); |
| 413 | # ifdef DEBUG1 |
| 414 | cx->runtime()->jitRuntime()->disallowArbitraryCode(); |
| 415 | # endif |
| 416 | } |
| 417 | |
| 418 | void SuspenderObject::suspend(JSContext* cx) { |
| 419 | MOZ_ASSERT(state() == SuspenderState::Active)do { static_assert( mozilla::detail::AssertionConditionType< decltype(state() == SuspenderState::Active)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(state() == SuspenderState::Active ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "state() == SuspenderState::Active", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 419); AnnotateMozCrashReason("MOZ_ASSERT" "(" "state() == SuspenderState::Active" ")"); do { *((volatile int*)__null) = 419; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 420 | setSuspended(cx); |
| 421 | cx->wasm().promiseIntegration.suspendedStacks_.pushFront(data()); |
| 422 | data()->setSuspendedBy(&cx->wasm().promiseIntegration); |
| 423 | cx->wasm().promiseIntegration.setActiveSuspender(nullptr); |
| 424 | # ifdef DEBUG1 |
| 425 | cx->runtime()->jitRuntime()->clearDisallowArbitraryCode(); |
| 426 | # endif |
| 427 | |
| 428 | if (cx->realm()->isDebuggee()) { |
| 429 | WasmFrameIter iter(cx->activation()->asJit()); |
| 430 | while (true) { |
| 431 | MOZ_ASSERT(!iter.done())do { static_assert( mozilla::detail::AssertionConditionType< decltype(!iter.done())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!iter.done()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!iter.done()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 431); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!iter.done()" ")"); do { *((volatile int*)__null) = 431; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 432 | if (iter.debugEnabled()) { |
| 433 | DebugAPI::onSuspendWasmFrame(cx, iter.debugFrame()); |
| 434 | } |
| 435 | ++iter; |
| 436 | if (iter.currentFrameStackSwitched()) { |
| 437 | break; |
| 438 | } |
| 439 | } |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | void SuspenderObject::resume(JSContext* cx) { |
| 444 | MOZ_ASSERT(state() == SuspenderState::Suspended)do { static_assert( mozilla::detail::AssertionConditionType< decltype(state() == SuspenderState::Suspended)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(state() == SuspenderState::Suspended ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "state() == SuspenderState::Suspended", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 444); AnnotateMozCrashReason("MOZ_ASSERT" "(" "state() == SuspenderState::Suspended" ")"); do { *((volatile int*)__null) = 444; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 445 | cx->wasm().promiseIntegration.setActiveSuspender(this); |
| 446 | setActive(cx); |
| 447 | data()->setSuspendedBy(nullptr); |
| 448 | cx->wasm().promiseIntegration.suspendedStacks_.remove(data()); |
| 449 | # ifdef DEBUG1 |
| 450 | cx->runtime()->jitRuntime()->disallowArbitraryCode(); |
| 451 | # endif |
| 452 | |
| 453 | if (cx->realm()->isDebuggee()) { |
| 454 | for (FrameIter iter(cx);; ++iter) { |
| 455 | MOZ_RELEASE_ASSERT(!iter.done(), "expecting stackSwitched()")do { static_assert( mozilla::detail::AssertionConditionType< decltype(!iter.done())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!iter.done()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("!iter.done()" " (" "expecting stackSwitched()" ")", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 455); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "!iter.done()" ") (" "expecting stackSwitched()" ")"); do { *((volatile int *)__null) = 455; __attribute__((nomerge)) ::abort(); } while ( false); } } while (false); |
| 456 | if (iter.isWasm()) { |
| 457 | WasmFrameIter& wasmIter = iter.wasmFrame(); |
| 458 | if (wasmIter.currentFrameStackSwitched()) { |
| 459 | break; |
| 460 | } |
| 461 | if (wasmIter.debugEnabled()) { |
| 462 | DebugAPI::onResumeWasmFrame(cx, iter); |
| 463 | } |
| 464 | } |
| 465 | } |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | void SuspenderObject::leave(JSContext* cx) { |
| 470 | cx->wasm().promiseIntegration.setActiveSuspender(nullptr); |
| 471 | # ifdef DEBUG1 |
| 472 | cx->runtime()->jitRuntime()->clearDisallowArbitraryCode(); |
| 473 | # endif |
| 474 | // We are exiting alternative stack if state is active, |
| 475 | // otherwise the stack was just suspended. |
| 476 | switch (state()) { |
| 477 | case SuspenderState::Active: |
| 478 | setMoribund(cx); |
| 479 | break; |
| 480 | case SuspenderState::Suspended: |
| 481 | break; |
| 482 | case SuspenderState::Initial: |
| 483 | case SuspenderState::Moribund: |
| 484 | MOZ_CRASH()do { do { } while (false); MOZ_ReportCrash("" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 484); AnnotateMozCrashReason("MOZ_CRASH(" ")"); do { *((volatile int*)__null) = 484; __attribute__((nomerge)) ::abort(); } while (false); } while (false); |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | void SuspenderObject::forwardToSuspendable() { |
| 489 | // Injecting suspendable stack back into main one at the exit frame. |
| 490 | SuspenderObjectData* data = this->data(); |
| 491 | uint8_t* mainExitFP = (uint8_t*)data->mainExitFP(); |
| 492 | *reinterpret_cast<void**>(mainExitFP + Frame::callerFPOffset()) = |
| 493 | data->suspendableFP(); |
| 494 | *reinterpret_cast<void**>(mainExitFP + Frame::returnAddressOffset()) = |
| 495 | data->suspendedReturnAddress(); |
| 496 | } |
| 497 | |
| 498 | bool CallOnMainStack(JSContext* cx, CallOnMainStackFn fn, void* data) { |
| 499 | Rooted<SuspenderObject*> suspender( |
| 500 | cx, cx->wasm().promiseIntegration.activeSuspender()); |
| 501 | SuspenderObjectData* stacks = suspender->data(); |
| 502 | |
| 503 | cx->wasm().promiseIntegration.setActiveSuspender(nullptr); |
| 504 | |
| 505 | MOZ_ASSERT(suspender->state() == SuspenderState::Active)do { static_assert( mozilla::detail::AssertionConditionType< decltype(suspender->state() == SuspenderState::Active)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(suspender->state() == SuspenderState::Active))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("suspender->state() == SuspenderState::Active" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 505); AnnotateMozCrashReason("MOZ_ASSERT" "(" "suspender->state() == SuspenderState::Active" ")"); do { *((volatile int*)__null) = 505; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 506 | suspender->setSuspended(cx); |
| 507 | |
| 508 | # ifdef JS_SIMULATOR |
| 509 | # if defined(JS_SIMULATOR_ARM64) || defined(JS_SIMULATOR_ARM) |
| 510 | // The simulator is using its own stack, however switching is needed for |
| 511 | // virtual registers. |
| 512 | stacks->switchSimulatorToMain(); |
| 513 | bool res = fn(data); |
| 514 | stacks->switchSimulatorToSuspendable(); |
| 515 | # else |
| 516 | # error "not supported" |
| 517 | # endif |
| 518 | # else |
| 519 | // The platform specific code below inserts offsets as strings into inline |
| 520 | // assembly. CHECK_OFFSETS verifies the specified literals in macros below. |
| 521 | # define CHECK_OFFSETS(MAIN_FP_OFFSET, MAIN_SP_OFFSET, \ |
| 522 | SUSPENDABLE_FP_OFFSET, SUSPENDABLE_SP_OFFSET) \ |
| 523 | static_assert( \ |
| 524 | (MAIN_FP_OFFSET) == SuspenderObjectData::offsetOfMainFP() && \ |
| 525 | (MAIN_SP_OFFSET) == SuspenderObjectData::offsetOfMainSP() && \ |
| 526 | (SUSPENDABLE_FP_OFFSET) == \ |
| 527 | SuspenderObjectData::offsetOfSuspendableFP() && \ |
| 528 | (SUSPENDABLE_SP_OFFSET) == \ |
| 529 | SuspenderObjectData::offsetOfSuspendableSP()); |
| 530 | |
| 531 | // The following assembly code temporarily switches FP/SP pointers to be on |
| 532 | // main stack, while maintaining frames linking. After |
| 533 | // `CallImportData::Call` execution suspendable stack FP/SP will be restored. |
| 534 | // |
| 535 | // Because the assembly sequences contain a call, the trashed-register list |
| 536 | // must contain all the caller saved registers. They must also contain "cc" |
| 537 | // and "memory" since both of those state elements could be modified by the |
| 538 | // call. They also need a "volatile" qualifier to ensure that the they don't |
| 539 | // get optimised out or otherwise messed with by clang/gcc. |
| 540 | // |
| 541 | // `Registers::VolatileMask` (in the assembler complex) is useful in that it |
| 542 | // lists the caller-saved registers. |
| 543 | |
| 544 | uintptr_t res; |
| 545 | |
| 546 | // clang-format off |
| 547 | #if defined(_M_ARM64) || defined(__aarch64__) |
| 548 | # define CALLER_SAVED_REGS \ |
| 549 | "x0", "x1", "x2", "x3","x4", "x5", "x6", "x7", "x8", "x9", "x10", \ |
| 550 | "x11", "x12", "x13", "x14", "x15", "x16", "x17", /* "x18", */ \ |
| 551 | "x19", "x20", /* it's unclear who saves these two, so be safe */ \ |
| 552 | /* claim that all the vector regs are caller-saved, for safety */ \ |
| 553 | "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9", "v10", \ |
| 554 | "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19", \ |
| 555 | "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", \ |
| 556 | "v29", "v30", "v31" |
| 557 | # define INLINED_ASM(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP) \ |
| 558 | CHECK_OFFSETS(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP); \ |
| 559 | asm volatile( \ |
| 560 | "\n mov x0, %1" \ |
| 561 | "\n mov x27, sp " \ |
| 562 | "\n str x29, [x0, #" #SUSPENDABLE_FP "] " \ |
| 563 | "\n str x27, [x0, #" #SUSPENDABLE_SP "] " \ |
| 564 | \ |
| 565 | "\n ldr x29, [x0, #" #MAIN_FP "] " \ |
| 566 | "\n ldr x27, [x0, #" #MAIN_SP "] " \ |
| 567 | "\n mov sp, x27 " \ |
| 568 | \ |
| 569 | "\n stp x0, x27, [sp, #-16]! " \ |
| 570 | \ |
| 571 | "\n mov x0, %3" \ |
| 572 | "\n blr %2 " \ |
| 573 | \ |
| 574 | "\n ldp x3, x27, [sp], #16 " \ |
| 575 | \ |
| 576 | "\n mov x27, sp " \ |
| 577 | "\n str x29, [x3, #" #MAIN_FP "] " \ |
| 578 | "\n str x27, [x3, #" #MAIN_SP "] " \ |
| 579 | \ |
| 580 | "\n ldr x29, [x3, #" #SUSPENDABLE_FP "] " \ |
| 581 | "\n ldr x27, [x3, #" #SUSPENDABLE_SP "] " \ |
| 582 | "\n mov sp, x27 " \ |
| 583 | "\n mov %0, x0" \ |
| 584 | : "=r"(res) \ |
| 585 | : "r"(stacks), "r"(fn), "r"(data) \ |
| 586 | : "x0", "x3", "x27", CALLER_SAVED_REGS, "cc", "memory") |
| 587 | INLINED_ASM(24, 32, 40, 48); |
| 588 | |
| 589 | # elif defined(_WIN64) && defined(_M_X64) |
| 590 | # define INLINED_ASM(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP) \ |
| 591 | CHECK_OFFSETS(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP); \ |
| 592 | asm("\n mov %1, %%rcx" \ |
| 593 | "\n mov %%rbp, " #SUSPENDABLE_FP "(%%rcx)" \ |
| 594 | "\n mov %%rsp, " #SUSPENDABLE_SP "(%%rcx)" \ |
| 595 | \ |
| 596 | "\n mov " #MAIN_FP "(%%rcx), %%rbp" \ |
| 597 | "\n mov " #MAIN_SP "(%%rcx), %%rsp" \ |
| 598 | \ |
| 599 | "\n push %%rcx" \ |
| 600 | "\n push %%rdx" \ |
| 601 | \ |
| 602 | "\n mov %3, %%rcx" \ |
| 603 | "\n call *%2" \ |
| 604 | \ |
| 605 | "\n pop %%rdx" \ |
| 606 | "\n pop %%rcx" \ |
| 607 | \ |
| 608 | "\n mov %%rbp, " #MAIN_FP "(%%rcx)" \ |
| 609 | "\n mov %%rsp, " #MAIN_SP "(%%rcx)" \ |
| 610 | \ |
| 611 | "\n mov " #SUSPENDABLE_FP "(%%rcx), %%rbp" \ |
| 612 | "\n mov " #SUSPENDABLE_SP "(%%rcx), %%rsp" \ |
| 613 | \ |
| 614 | "\n movq %%rax, %0" \ |
| 615 | : "=r"(res) \ |
| 616 | : "r"(stacks), "r"(fn), "r"(data) \ |
| 617 | : "rcx", "rax", "cc", "memory") |
| 618 | INLINED_ASM(24, 32, 40, 48); |
| 619 | |
| 620 | # elif defined(__x86_64__1) |
| 621 | # define INLINED_ASM(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP) \ |
| 622 | CHECK_OFFSETS(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP); \ |
| 623 | asm("\n mov %1, %%rdi" \ |
| 624 | "\n mov %%rbp, " #SUSPENDABLE_FP "(%%rdi)" \ |
| 625 | "\n mov %%rsp, " #SUSPENDABLE_SP "(%%rdi)" \ |
| 626 | \ |
| 627 | "\n mov " #MAIN_FP "(%%rdi), %%rbp" \ |
| 628 | "\n mov " #MAIN_SP "(%%rdi), %%rsp" \ |
| 629 | \ |
| 630 | "\n push %%rdi" \ |
| 631 | "\n push %%rdx" \ |
| 632 | \ |
| 633 | "\n mov %3, %%rdi" \ |
| 634 | "\n call *%2" \ |
| 635 | \ |
| 636 | "\n pop %%rdx" \ |
| 637 | "\n pop %%rdi" \ |
| 638 | \ |
| 639 | "\n mov %%rbp, " #MAIN_FP "(%%rdi)" \ |
| 640 | "\n mov %%rsp, " #MAIN_SP "(%%rdi)" \ |
| 641 | \ |
| 642 | "\n mov " #SUSPENDABLE_FP "(%%rdi), %%rbp" \ |
| 643 | "\n mov " #SUSPENDABLE_SP "(%%rdi), %%rsp" \ |
| 644 | \ |
| 645 | "\n movq %%rax, %0" \ |
| 646 | : "=r"(res) \ |
| 647 | : "r"(stacks), "r"(fn), "r"(data) \ |
| 648 | : "rdi", "rax", "cc", "memory") |
| 649 | INLINED_ASM(24, 32, 40, 48); |
| 650 | # elif defined(__i386__) || defined(_M_IX86) |
| 651 | # define CALLER_SAVED_REGS "eax", "ecx", "edx" |
| 652 | # define INLINED_ASM(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP) \ |
| 653 | CHECK_OFFSETS(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP); \ |
| 654 | asm("\n mov %1, %%edx" \ |
| 655 | "\n mov %%ebp, " #SUSPENDABLE_FP "(%%edx)" \ |
| 656 | "\n mov %%esp, " #SUSPENDABLE_SP "(%%edx)" \ |
| 657 | \ |
| 658 | "\n mov " #MAIN_FP "(%%edx), %%ebp" \ |
| 659 | "\n mov " #MAIN_SP "(%%edx), %%esp" \ |
| 660 | \ |
| 661 | "\n push %%edx" \ |
| 662 | "\n sub $8, %%esp" \ |
| 663 | "\n push %3" \ |
| 664 | "\n call *%2" \ |
| 665 | "\n add $12, %%esp" \ |
| 666 | "\n pop %%edx" \ |
| 667 | \ |
| 668 | "\n mov %%ebp, " #MAIN_FP "(%%edx)" \ |
| 669 | "\n mov %%esp, " #MAIN_SP "(%%edx)" \ |
| 670 | \ |
| 671 | "\n mov " #SUSPENDABLE_FP "(%%edx), %%ebp" \ |
| 672 | "\n mov " #SUSPENDABLE_SP "(%%edx), %%esp" \ |
| 673 | \ |
| 674 | "\n mov %%eax, %0" \ |
| 675 | : "=r"(res) \ |
| 676 | : "r"(stacks), "r"(fn), "r"(data) \ |
| 677 | : CALLER_SAVED_REGS, "cc", "memory") |
| 678 | INLINED_ASM(12, 16, 20, 24); |
| 679 | |
| 680 | # elif defined(__arm__) |
| 681 | # define INLINED_ASM(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP) \ |
| 682 | CHECK_OFFSETS(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP); \ |
| 683 | asm("\n mov r0, %1" \ |
| 684 | "\n mov r1, sp" \ |
| 685 | "\n str r11, [r0, #" #SUSPENDABLE_FP "]" \ |
| 686 | "\n str r1, [r0, #" #SUSPENDABLE_SP "]" \ |
| 687 | \ |
| 688 | "\n ldr r11, [r0, #" #MAIN_FP "]" \ |
| 689 | "\n ldr r1, [r0, #" #MAIN_SP "]" \ |
| 690 | "\n mov sp, r1" \ |
| 691 | \ |
| 692 | "\n str r0, [sp, #-8]! " \ |
| 693 | \ |
| 694 | "\n mov r0, %3" \ |
| 695 | "\n blx %2" \ |
| 696 | \ |
| 697 | "\n ldr r2, [sp], #8 " \ |
| 698 | \ |
| 699 | "\n mov r1, sp" \ |
| 700 | "\n str r11, [r2, #" #MAIN_FP "]" \ |
| 701 | "\n str r1, [r2, #" #MAIN_SP "]" \ |
| 702 | \ |
| 703 | "\n ldr r11, [r2, #" #SUSPENDABLE_FP "]" \ |
| 704 | "\n ldr r1, [r2, #" #SUSPENDABLE_SP "]" \ |
| 705 | "\n mov sp, r1" \ |
| 706 | "\n mov %0, r0" \ |
| 707 | : "=r"(res) \ |
| 708 | : "r"(stacks), "r"(fn), "r"(data) \ |
| 709 | : "r0", "r1", "r2", "r3", "cc", "memory") |
| 710 | INLINED_ASM(12, 16, 20, 24); |
| 711 | |
| 712 | #elif defined(__loongarch_lp64) |
| 713 | # define CALLER_SAVED_REGS \ |
| 714 | "$ra", "$a0", "$a1", "$a2", "$a3", "$a4", "$a5", "$a6", "$a7", \ |
| 715 | "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8", \ |
| 716 | "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", "$f8", \ |
| 717 | "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", "$f16", \ |
| 718 | "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23" |
| 719 | # define INLINED_ASM(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP) \ |
| 720 | CHECK_OFFSETS(MAIN_FP, MAIN_SP, SUSPENDABLE_FP, SUSPENDABLE_SP); \ |
| 721 | asm volatile( \ |
| 722 | "\n move $a0, %1" \ |
| 723 | "\n st.d $fp, $a0, " #SUSPENDABLE_FP \ |
| 724 | "\n st.d $sp, $a0, " #SUSPENDABLE_SP \ |
| 725 | \ |
| 726 | "\n ld.d $fp, $a0, " #MAIN_FP \ |
| 727 | "\n ld.d $sp, $a0, " #MAIN_SP \ |
| 728 | \ |
| 729 | "\n addi.d $sp, $sp, -16" \ |
| 730 | "\n st.d $a0, $sp, 8" \ |
| 731 | \ |
| 732 | "\n move $a0, %3" \ |
| 733 | "\n jirl $ra, %2, 0" \ |
| 734 | \ |
| 735 | "\n ld.d $a3, $sp, 8" \ |
| 736 | "\n addi.d $sp, $sp, 16" \ |
| 737 | \ |
| 738 | "\n st.d $fp, $a3, " #MAIN_FP \ |
| 739 | "\n st.d $sp, $a3, " #MAIN_SP \ |
| 740 | \ |
| 741 | "\n ld.d $fp, $a3, " #SUSPENDABLE_FP \ |
| 742 | "\n ld.d $sp, $a3, " #SUSPENDABLE_SP \ |
| 743 | "\n move %0, $a0" \ |
| 744 | : "=r"(res) \ |
| 745 | : "r"(stacks), "r"(fn), "r"(data) \ |
| 746 | : "$a0", "$a3", CALLER_SAVED_REGS, "cc", "memory") |
| 747 | INLINED_ASM(24, 32, 40, 48); |
| 748 | |
| 749 | # else |
| 750 | MOZ_CRASH("Not supported for this platform")do { do { } while (false); MOZ_ReportCrash("" "Not supported for this platform" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 750); AnnotateMozCrashReason("MOZ_CRASH(" "Not supported for this platform" ")"); do { *((volatile int*)__null) = 750; __attribute__((nomerge )) ::abort(); } while (false); } while (false); |
| 751 | # endif |
| 752 | // clang-format on |
| 753 | # endif // JS_SIMULATOR |
| 754 | |
| 755 | bool ok = res; |
| 756 | suspender->setActive(cx); |
| 757 | cx->wasm().promiseIntegration.setActiveSuspender(suspender); |
| 758 | |
| 759 | # undef INLINED_ASM |
| 760 | # undef CHECK_OFFSETS |
| 761 | # undef CALLER_SAVED_REGS |
| 762 | |
| 763 | return ok; |
| 764 | } |
| 765 | |
| 766 | static void CleanupActiveSuspender(JSContext* cx) { |
| 767 | SuspenderObject* suspender = cx->wasm().promiseIntegration.activeSuspender(); |
| 768 | MOZ_ASSERT(suspender)do { static_assert( mozilla::detail::AssertionConditionType< decltype(suspender)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(suspender))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("suspender", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 768); AnnotateMozCrashReason("MOZ_ASSERT" "(" "suspender" ")" ); do { *((volatile int*)__null) = 768; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 769 | cx->wasm().promiseIntegration.setActiveSuspender(nullptr); |
| 770 | suspender->setMoribund(cx); |
| 771 | } |
| 772 | |
| 773 | // Suspending |
| 774 | |
| 775 | // Builds a wasm module with following structure: |
| 776 | // (module |
| 777 | // (type $params (struct (field ..)*))) |
| 778 | // (type $results (struct (field ..)*))) |
| 779 | // (import "" "" (func $suspending.wrappedfn ..)) |
| 780 | // (func $suspending.exported .. ) |
| 781 | // (func $suspending.trampoline ..) |
| 782 | // (func $suspending.continue-on-suspendable ..) |
| 783 | // (export "" (func $suspending.exported)) |
| 784 | // ) |
| 785 | // |
| 786 | // The module provides logic for the state transitions (see the SMDOC): |
| 787 | // - Invoke Suspending Import via $suspending.exported |
| 788 | // - Suspending Function Returns a Promise via $suspending.trampoline |
| 789 | // - Promise Resolved transitions via $suspending.continue-on-suspendable |
| 790 | // |
| 791 | class SuspendingFunctionModuleFactory { |
| 792 | public: |
| 793 | enum TypeIdx { |
| 794 | ParamsTypeIndex, |
| 795 | ResultsTypeIndex, |
| 796 | }; |
| 797 | |
| 798 | enum FnIdx { |
| 799 | WrappedFnIndex, |
| 800 | ExportedFnIndex, |
| 801 | TrampolineFnIndex, |
| 802 | ContinueOnSuspendableFnIndex |
| 803 | }; |
| 804 | |
| 805 | private: |
| 806 | // Builds function that will be imported to wasm module: |
| 807 | // (func $suspending.exported |
| 808 | // (param ..)* (result ..)* |
| 809 | // (local $suspender externref) |
| 810 | // (local $results (ref $results)) |
| 811 | // call $builtin.current-suspender |
| 812 | // local.tee $suspender |
| 813 | // ref.func $suspending.trampoline |
| 814 | // local.get $i* |
| 815 | // stuct.new $param-type |
| 816 | // stack-switch SwitchToMain ;; <- (suspender,fn,data) |
| 817 | // local.get $suspender |
| 818 | // call $builtin.get-suspending-promise-result |
| 819 | // ref.cast $results-type |
| 820 | // local.set $results |
| 821 | // (struct.get $results (local.get $results))* |
| 822 | // ) |
| 823 | bool encodeExportedFunction(CodeMetadata& codeMeta, uint32_t paramsSize, |
| 824 | uint32_t resultSize, uint32_t paramsOffset, |
| 825 | RefType resultType, Bytes& bytecode) { |
| 826 | Encoder encoder(bytecode, *codeMeta.types); |
| 827 | ValTypeVector locals; |
| 828 | if (!locals.emplaceBack(RefType::extern_())) { |
| 829 | return false; |
| 830 | } |
| 831 | if (!locals.emplaceBack(resultType)) { |
| 832 | return false; |
| 833 | } |
| 834 | if (!EncodeLocalEntries(encoder, locals)) { |
| 835 | return false; |
| 836 | } |
| 837 | |
| 838 | const int suspenderIndex = paramsSize; |
| 839 | if (!encoder.writeOp(Op::I32Const) || !encoder.writeVarU32(0)) { |
| 840 | return false; |
| 841 | } |
| 842 | if (!encoder.writeOp(MozOp::CallBuiltinModuleFunc) || |
| 843 | !encoder.writeVarU32((uint32_t)BuiltinModuleFuncId::CurrentSuspender)) { |
| 844 | return false; |
| 845 | } |
| 846 | if (!encoder.writeOp(Op::LocalTee) || |
| 847 | !encoder.writeVarU32(suspenderIndex)) { |
| 848 | return false; |
| 849 | } |
| 850 | |
| 851 | // Results local is located after all params and suspender. |
| 852 | const int resultsIndex = paramsSize + 1; |
| 853 | |
| 854 | if (!encoder.writeOp(Op::RefFunc) || |
| 855 | !encoder.writeVarU32(TrampolineFnIndex)) { |
| 856 | return false; |
| 857 | } |
| 858 | for (uint32_t i = 0; i < paramsSize; i++) { |
| 859 | if (!encoder.writeOp(Op::LocalGet) || |
| 860 | !encoder.writeVarU32(i + paramsOffset)) { |
| 861 | return false; |
| 862 | } |
| 863 | } |
| 864 | if (!encoder.writeOp(GcOp::StructNew) || |
| 865 | !encoder.writeVarU32(ParamsTypeIndex)) { |
| 866 | return false; |
| 867 | } |
| 868 | |
| 869 | if (!encoder.writeOp(MozOp::StackSwitch) || |
| 870 | !encoder.writeVarU32(uint32_t(StackSwitchKind::SwitchToMain))) { |
| 871 | return false; |
| 872 | } |
| 873 | |
| 874 | if (!encoder.writeOp(Op::LocalGet) || |
| 875 | !encoder.writeVarU32(suspenderIndex)) { |
| 876 | return false; |
| 877 | } |
| 878 | if (!encoder.writeOp(MozOp::CallBuiltinModuleFunc) || |
| 879 | !encoder.writeVarU32( |
| 880 | (uint32_t)BuiltinModuleFuncId::GetSuspendingPromiseResult)) { |
| 881 | return false; |
| 882 | } |
| 883 | if (!encoder.writeOp(GcOp::RefCast) || |
| 884 | !encoder.writeVarU32(ResultsTypeIndex) || |
| 885 | !encoder.writeOp(Op::LocalSet) || !encoder.writeVarU32(resultsIndex)) { |
| 886 | return false; |
| 887 | } |
| 888 | for (uint32_t i = 0; i < resultSize; i++) { |
| 889 | if (!encoder.writeOp(Op::LocalGet) || |
| 890 | !encoder.writeVarU32(resultsIndex) || |
| 891 | !encoder.writeOp(GcOp::StructGet) || |
| 892 | !encoder.writeVarU32(ResultsTypeIndex) || !encoder.writeVarU32(i)) { |
| 893 | return false; |
| 894 | } |
| 895 | } |
| 896 | return encoder.writeOp(Op::End); |
| 897 | } |
| 898 | |
| 899 | // Builds function that is called on main stack: |
| 900 | // (func $suspending.trampoline |
| 901 | // (param $params (ref $suspender)) (param $param (ref $param-type)) |
| 902 | // (result anyref) |
| 903 | // local.get $suspender ;; for $builtin.forward-exn-to-suspended below |
| 904 | // block (result exnref) |
| 905 | // try_table (catch_all_ref 0) |
| 906 | // local.get $suspender ;; for call $add-promise-reactions |
| 907 | // (struct.get $param-type $i (local.get $param))* |
| 908 | // call $suspending.wrappedfn |
| 909 | // ref.func $suspending.continue-on-suspendable |
| 910 | // call $builtin.add-promise-reactions |
| 911 | // return |
| 912 | // end |
| 913 | // unreachable |
| 914 | // end |
| 915 | // call $builtin.forward-exn-to-suspended |
| 916 | // ) |
| 917 | // The function calls suspending import and returns into the |
| 918 | // $promising.exported function because that was the top function |
| 919 | // on the main stack. |
| 920 | bool encodeTrampolineFunction(CodeMetadata& codeMeta, uint32_t paramsSize, |
| 921 | Bytes& bytecode) { |
| 922 | Encoder encoder(bytecode, *codeMeta.types); |
| 923 | if (!EncodeLocalEntries(encoder, ValTypeVector())) { |
| 924 | return false; |
| 925 | } |
| 926 | const uint32_t SuspenderIndex = 0; |
| 927 | const uint32_t ParamsIndex = 1; |
| 928 | |
| 929 | if (!encoder.writeOp(Op::LocalGet) || |
| 930 | !encoder.writeVarU32(SuspenderIndex)) { |
| 931 | return false; |
| 932 | } |
| 933 | |
| 934 | if (!encoder.writeOp(Op::Block) || |
| 935 | !encoder.writeFixedU8(uint8_t(TypeCode::ExnRef))) { |
| 936 | return false; |
| 937 | } |
| 938 | |
| 939 | if (!encoder.writeOp(Op::TryTable) || |
| 940 | !encoder.writeFixedU8(uint8_t(TypeCode::BlockVoid)) || |
| 941 | !encoder.writeVarU32(1) || |
| 942 | !encoder.writeFixedU8(/* catch_all_ref = */ 0x03) || |
| 943 | !encoder.writeVarU32(0)) { |
| 944 | return false; |
| 945 | } |
| 946 | |
| 947 | // For AddPromiseReactions call below. |
| 948 | if (!encoder.writeOp(Op::LocalGet) || |
| 949 | !encoder.writeVarU32(SuspenderIndex)) { |
| 950 | return false; |
| 951 | } |
| 952 | |
| 953 | for (uint32_t i = 0; i < paramsSize; i++) { |
| 954 | if (!encoder.writeOp(Op::LocalGet) || !encoder.writeVarU32(ParamsIndex)) { |
| 955 | return false; |
| 956 | } |
| 957 | if (!encoder.writeOp(GcOp::StructGet) || |
| 958 | !encoder.writeVarU32(ParamsTypeIndex) || !encoder.writeVarU32(i)) { |
| 959 | return false; |
| 960 | } |
| 961 | } |
| 962 | if (!encoder.writeOp(Op::Call) || !encoder.writeVarU32(WrappedFnIndex)) { |
| 963 | return false; |
| 964 | } |
| 965 | if (!encoder.writeOp(Op::RefFunc) || |
| 966 | !encoder.writeVarU32(ContinueOnSuspendableFnIndex)) { |
| 967 | return false; |
| 968 | } |
| 969 | |
| 970 | if (!encoder.writeOp(MozOp::CallBuiltinModuleFunc) || |
| 971 | !encoder.writeVarU32( |
| 972 | (uint32_t)BuiltinModuleFuncId::AddPromiseReactions)) { |
| 973 | return false; |
| 974 | } |
| 975 | |
| 976 | if (!encoder.writeOp(Op::Return) || !encoder.writeOp(Op::End) || |
| 977 | !encoder.writeOp(Op::Unreachable) || !encoder.writeOp(Op::End)) { |
| 978 | return false; |
| 979 | } |
| 980 | |
| 981 | if (!encoder.writeOp(MozOp::CallBuiltinModuleFunc) || |
| 982 | !encoder.writeVarU32( |
| 983 | (uint32_t)BuiltinModuleFuncId::ForwardExceptionToSuspended)) { |
| 984 | return false; |
| 985 | } |
| 986 | |
| 987 | return encoder.writeOp(Op::End); |
| 988 | } |
| 989 | |
| 990 | // Builds function that is called on main stack: |
| 991 | // (func $suspending.continue-on-suspendable |
| 992 | // (param $params (ref $suspender)) (param $results externref) |
| 993 | // (result externref) |
| 994 | // local.get $suspender |
| 995 | // ref.null funcref |
| 996 | // local.get $results |
| 997 | // any.convert_extern |
| 998 | // stack-switch ContinueOnSuspendable |
| 999 | // ) |
| 1000 | bool encodeContinueOnSuspendableFunction(CodeMetadata& codeMeta, |
| 1001 | uint32_t resultsSize, |
| 1002 | Bytes& bytecode) { |
| 1003 | Encoder encoder(bytecode, *codeMeta.types); |
| 1004 | if (!EncodeLocalEntries(encoder, ValTypeVector())) { |
| 1005 | return false; |
| 1006 | } |
| 1007 | |
| 1008 | const uint32_t SuspenderIndex = 0; |
| 1009 | const uint32_t ResultsIndex = 1; |
| 1010 | |
| 1011 | if (!encoder.writeOp(Op::LocalGet) || |
| 1012 | !encoder.writeVarU32(SuspenderIndex)) { |
| 1013 | return false; |
| 1014 | } |
| 1015 | if (!encoder.writeOp(Op::RefNull) || |
| 1016 | !encoder.writeValType(ValType(RefType::func()))) { |
| 1017 | return false; |
| 1018 | } |
| 1019 | if (!encoder.writeOp(Op::LocalGet) || !encoder.writeVarU32(ResultsIndex) || |
| 1020 | !encoder.writeOp(GcOp::AnyConvertExtern)) { |
| 1021 | return false; |
| 1022 | } |
| 1023 | |
| 1024 | if (!encoder.writeOp(MozOp::StackSwitch) || |
| 1025 | !encoder.writeVarU32( |
| 1026 | uint32_t(StackSwitchKind::ContinueOnSuspendable))) { |
| 1027 | return false; |
| 1028 | } |
| 1029 | |
| 1030 | return encoder.writeOp(Op::End); |
| 1031 | } |
| 1032 | |
| 1033 | public: |
| 1034 | SharedModule build(JSContext* cx, HandleObject func, ValTypeVector&& params, |
| 1035 | ValTypeVector&& results) { |
| 1036 | FeatureOptions options; |
| 1037 | options.isBuiltinModule = true; |
| 1038 | options.requireExnref = true; |
| 1039 | |
| 1040 | ScriptedCaller scriptedCaller; |
| 1041 | SharedCompileArgs compileArgs = |
| 1042 | CompileArgs::buildAndReport(cx, std::move(scriptedCaller), options); |
| 1043 | if (!compileArgs) { |
| 1044 | return nullptr; |
| 1045 | } |
| 1046 | |
| 1047 | MutableModuleMetadata moduleMeta = js_new<ModuleMetadata>(); |
| 1048 | if (!moduleMeta || !moduleMeta->init(*compileArgs)) { |
| 1049 | return nullptr; |
| 1050 | } |
| 1051 | MutableCodeMetadata codeMeta = moduleMeta->codeMeta; |
| 1052 | |
| 1053 | MOZ_ASSERT(IonPlatformSupport())do { static_assert( mozilla::detail::AssertionConditionType< decltype(IonPlatformSupport())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(IonPlatformSupport()))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("IonPlatformSupport()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1053); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IonPlatformSupport()" ")"); do { *((volatile int*)__null) = 1053; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1054 | CompilerEnvironment compilerEnv(CompileMode::Once, Tier::Optimized, |
| 1055 | DebugEnabled::False); |
| 1056 | compilerEnv.computeParameters(); |
| 1057 | |
| 1058 | RefType suspenderType = RefType::extern_(); |
| 1059 | RefType promiseType = RefType::extern_(); |
| 1060 | |
| 1061 | ValTypeVector paramsWithoutSuspender; |
| 1062 | |
| 1063 | const size_t resultsSize = results.length(); |
| 1064 | const size_t paramsSize = params.length(); |
| 1065 | const size_t paramsOffset = 0; |
| 1066 | if (!paramsWithoutSuspender.append(params.begin(), params.end())) { |
| 1067 | ReportOutOfMemory(cx); |
| 1068 | return nullptr; |
| 1069 | } |
| 1070 | |
| 1071 | ValTypeVector resultsRef; |
| 1072 | if (!resultsRef.emplaceBack(promiseType)) { |
| 1073 | ReportOutOfMemory(cx); |
| 1074 | return nullptr; |
| 1075 | } |
| 1076 | |
| 1077 | StructType boxedParamsStruct; |
| 1078 | if (!StructType::createImmutable(paramsWithoutSuspender, |
| 1079 | &boxedParamsStruct)) { |
| 1080 | ReportOutOfMemory(cx); |
| 1081 | return nullptr; |
| 1082 | } |
| 1083 | MOZ_ASSERT(codeMeta->types->length() == ParamsTypeIndex)do { static_assert( mozilla::detail::AssertionConditionType< decltype(codeMeta->types->length() == ParamsTypeIndex)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(codeMeta->types->length() == ParamsTypeIndex)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("codeMeta->types->length() == ParamsTypeIndex" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1083); AnnotateMozCrashReason("MOZ_ASSERT" "(" "codeMeta->types->length() == ParamsTypeIndex" ")"); do { *((volatile int*)__null) = 1083; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1084 | if (!codeMeta->types->addType(std::move(boxedParamsStruct))) { |
| 1085 | return nullptr; |
| 1086 | } |
| 1087 | |
| 1088 | StructType boxedResultType; |
| 1089 | if (!StructType::createImmutable(results, &boxedResultType)) { |
| 1090 | ReportOutOfMemory(cx); |
| 1091 | return nullptr; |
| 1092 | } |
| 1093 | MOZ_ASSERT(codeMeta->types->length() == ResultsTypeIndex)do { static_assert( mozilla::detail::AssertionConditionType< decltype(codeMeta->types->length() == ResultsTypeIndex) >::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(codeMeta->types->length() == ResultsTypeIndex) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("codeMeta->types->length() == ResultsTypeIndex" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1093); AnnotateMozCrashReason("MOZ_ASSERT" "(" "codeMeta->types->length() == ResultsTypeIndex" ")"); do { *((volatile int*)__null) = 1093; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1094 | if (!codeMeta->types->addType(std::move(boxedResultType))) { |
| 1095 | return nullptr; |
| 1096 | } |
| 1097 | |
| 1098 | MOZ_ASSERT(codeMeta->funcs.length() == WrappedFnIndex)do { static_assert( mozilla::detail::AssertionConditionType< decltype(codeMeta->funcs.length() == WrappedFnIndex)>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(codeMeta->funcs.length() == WrappedFnIndex))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("codeMeta->funcs.length() == WrappedFnIndex" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1098); AnnotateMozCrashReason("MOZ_ASSERT" "(" "codeMeta->funcs.length() == WrappedFnIndex" ")"); do { *((volatile int*)__null) = 1098; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1099 | if (!moduleMeta->addDefinedFunc(std::move(paramsWithoutSuspender), |
| 1100 | std::move(resultsRef))) { |
| 1101 | return nullptr; |
| 1102 | } |
| 1103 | |
| 1104 | // Imports names are not important, declare functions above as imports. |
| 1105 | codeMeta->numFuncImports = codeMeta->funcs.length(); |
| 1106 | |
| 1107 | // We will be looking up and using the exports function by index so |
| 1108 | // the name doesn't matter. |
| 1109 | MOZ_ASSERT(codeMeta->funcs.length() == ExportedFnIndex)do { static_assert( mozilla::detail::AssertionConditionType< decltype(codeMeta->funcs.length() == ExportedFnIndex)>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(codeMeta->funcs.length() == ExportedFnIndex))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("codeMeta->funcs.length() == ExportedFnIndex" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1109); AnnotateMozCrashReason("MOZ_ASSERT" "(" "codeMeta->funcs.length() == ExportedFnIndex" ")"); do { *((volatile int*)__null) = 1109; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1110 | if (!moduleMeta->addDefinedFunc(std::move(params), std::move(results), |
| 1111 | /*declareForRef = */ true, |
| 1112 | mozilla::Some(CacheableName()))) { |
| 1113 | return nullptr; |
| 1114 | } |
| 1115 | |
| 1116 | ValTypeVector paramsTrampoline, resultsTrampoline; |
| 1117 | if (!paramsTrampoline.emplaceBack(suspenderType) || |
| 1118 | !paramsTrampoline.emplaceBack(RefType::fromTypeDef( |
| 1119 | &(*codeMeta->types)[ParamsTypeIndex], false)) || |
| 1120 | !resultsTrampoline.emplaceBack(RefType::any())) { |
| 1121 | ReportOutOfMemory(cx); |
| 1122 | return nullptr; |
| 1123 | } |
| 1124 | MOZ_ASSERT(codeMeta->funcs.length() == TrampolineFnIndex)do { static_assert( mozilla::detail::AssertionConditionType< decltype(codeMeta->funcs.length() == TrampolineFnIndex)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(codeMeta->funcs.length() == TrampolineFnIndex))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("codeMeta->funcs.length() == TrampolineFnIndex" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1124); AnnotateMozCrashReason("MOZ_ASSERT" "(" "codeMeta->funcs.length() == TrampolineFnIndex" ")"); do { *((volatile int*)__null) = 1124; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1125 | if (!moduleMeta->addDefinedFunc(std::move(paramsTrampoline), |
| 1126 | std::move(resultsTrampoline), |
| 1127 | /*declareForRef = */ true)) { |
| 1128 | return nullptr; |
| 1129 | } |
| 1130 | |
| 1131 | ValTypeVector paramsContinueOnSuspendable, resultsContinueOnSuspendable; |
| 1132 | if (!paramsContinueOnSuspendable.emplaceBack(suspenderType) || |
| 1133 | !paramsContinueOnSuspendable.emplaceBack(RefType::extern_())) { |
| 1134 | ReportOutOfMemory(cx); |
| 1135 | return nullptr; |
| 1136 | } |
| 1137 | MOZ_ASSERT(codeMeta->funcs.length() == ContinueOnSuspendableFnIndex)do { static_assert( mozilla::detail::AssertionConditionType< decltype(codeMeta->funcs.length() == ContinueOnSuspendableFnIndex )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(codeMeta->funcs.length() == ContinueOnSuspendableFnIndex ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "codeMeta->funcs.length() == ContinueOnSuspendableFnIndex" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1137); AnnotateMozCrashReason("MOZ_ASSERT" "(" "codeMeta->funcs.length() == ContinueOnSuspendableFnIndex" ")"); do { *((volatile int*)__null) = 1137; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1138 | if (!moduleMeta->addDefinedFunc(std::move(paramsContinueOnSuspendable), |
| 1139 | std::move(resultsContinueOnSuspendable), |
| 1140 | /*declareForRef = */ true)) { |
| 1141 | return nullptr; |
| 1142 | } |
| 1143 | |
| 1144 | if (!moduleMeta->prepareForCompile(compilerEnv.mode())) { |
| 1145 | return nullptr; |
| 1146 | } |
| 1147 | |
| 1148 | ModuleGenerator mg(*codeMeta, compilerEnv, compilerEnv.initialState(), |
| 1149 | nullptr, nullptr, nullptr); |
| 1150 | if (!mg.initializeCompleteTier()) { |
| 1151 | return nullptr; |
| 1152 | } |
| 1153 | // Build functions and keep bytecodes around until the end. |
| 1154 | uint32_t funcBytecodeOffset = CallSite::FIRST_VALID_BYTECODE_OFFSET; |
| 1155 | Bytes bytecode; |
| 1156 | if (!encodeExportedFunction( |
| 1157 | *codeMeta, paramsSize, resultsSize, paramsOffset, |
| 1158 | RefType::fromTypeDef(&(*codeMeta->types)[ResultsTypeIndex], false), |
| 1159 | bytecode)) { |
| 1160 | ReportOutOfMemory(cx); |
| 1161 | return nullptr; |
| 1162 | } |
| 1163 | if (!mg.compileFuncDef(ExportedFnIndex, funcBytecodeOffset, |
| 1164 | bytecode.begin(), |
| 1165 | bytecode.begin() + bytecode.length())) { |
| 1166 | return nullptr; |
| 1167 | } |
| 1168 | funcBytecodeOffset += bytecode.length(); |
| 1169 | |
| 1170 | Bytes bytecode2; |
| 1171 | if (!encodeTrampolineFunction(*codeMeta, paramsSize, bytecode2)) { |
| 1172 | ReportOutOfMemory(cx); |
| 1173 | return nullptr; |
| 1174 | } |
| 1175 | if (!mg.compileFuncDef(TrampolineFnIndex, funcBytecodeOffset, |
| 1176 | bytecode2.begin(), |
| 1177 | bytecode2.begin() + bytecode2.length())) { |
| 1178 | return nullptr; |
| 1179 | } |
| 1180 | funcBytecodeOffset += bytecode2.length(); |
| 1181 | |
| 1182 | Bytes bytecode3; |
| 1183 | if (!encodeContinueOnSuspendableFunction(*codeMeta, paramsSize, |
| 1184 | bytecode3)) { |
| 1185 | ReportOutOfMemory(cx); |
| 1186 | return nullptr; |
| 1187 | } |
| 1188 | if (!mg.compileFuncDef(ContinueOnSuspendableFnIndex, funcBytecodeOffset, |
| 1189 | bytecode3.begin(), |
| 1190 | bytecode3.begin() + bytecode3.length())) { |
| 1191 | return nullptr; |
| 1192 | } |
| 1193 | funcBytecodeOffset += bytecode3.length(); |
Value stored to 'funcBytecodeOffset' is never read | |
| 1194 | |
| 1195 | if (!mg.finishFuncDefs()) { |
| 1196 | return nullptr; |
| 1197 | } |
| 1198 | |
| 1199 | SharedBytes shareableBytes = js_new<ShareableBytes>(); |
| 1200 | if (!shareableBytes) { |
| 1201 | ReportOutOfMemory(cx); |
| 1202 | return nullptr; |
| 1203 | } |
| 1204 | return mg.finishModule(*shareableBytes, moduleMeta, |
| 1205 | /*maybeCompleteTier2Listener=*/nullptr); |
| 1206 | } |
| 1207 | }; |
| 1208 | |
| 1209 | // Reaction on resolved/rejected suspending promise. |
| 1210 | static bool WasmPISuspendTaskContinue(JSContext* cx, unsigned argc, Value* vp) { |
| 1211 | CallArgs args = CallArgsFromVp(argc, vp); |
| 1212 | // The arg[0] has result of resolved promise, or rejection reason. |
| 1213 | Rooted<JSFunction*> callee(cx, &args.callee().as<JSFunction>()); |
| 1214 | RootedValue suspender(cx, callee->getExtendedSlot(SUSPENDER_SLOT)); |
| 1215 | RootedValue suspendingPromise(cx, callee->getExtendedSlot(PROMISE_SLOT)); |
| 1216 | |
| 1217 | // Convert result of the promise into the parameters/arguments for the |
| 1218 | // $suspending.continue-on-suspendable. |
| 1219 | RootedFunction continueOnSuspendable( |
| 1220 | cx, &callee->getExtendedSlot(CONTINUE_ON_SUSPENDABLE_SLOT) |
| 1221 | .toObject() |
| 1222 | .as<JSFunction>()); |
| 1223 | JS::RootedValueArray<2> argv(cx); |
| 1224 | argv[0].set(suspender); |
| 1225 | argv[1].set(suspendingPromise); |
| 1226 | |
| 1227 | JS::Rooted<JS::Value> rval(cx); |
| 1228 | if (Call(cx, UndefinedHandleValue, continueOnSuspendable, argv, &rval)) { |
| 1229 | return true; |
| 1230 | } |
| 1231 | |
| 1232 | // The stack was unwound during exception -- time to release resources. |
| 1233 | CleanupActiveSuspender(cx); |
| 1234 | |
| 1235 | if (cx->isThrowingOutOfMemory()) { |
| 1236 | return false; |
| 1237 | } |
| 1238 | Rooted<PromiseObject*> promise( |
| 1239 | cx, suspender.toObject().as<SuspenderObject>().promisingPromise()); |
| 1240 | return RejectPromiseWithPendingError(cx, promise); |
| 1241 | } |
| 1242 | |
| 1243 | static bool IsPromiseValue(JSContext* aCx, JS::Handle<JS::Value> aValue) { |
| 1244 | if (!aValue.isObject()) { |
| 1245 | return false; |
| 1246 | } |
| 1247 | |
| 1248 | // We only care about Promise here, so CheckedUnwrapStatic is fine. |
| 1249 | JS::Rooted<JSObject*> obj(aCx, js::CheckedUnwrapStatic(&aValue.toObject())); |
| 1250 | if (!obj) { |
| 1251 | return false; |
| 1252 | } |
| 1253 | |
| 1254 | return JS::IsPromiseObject(obj); |
| 1255 | } |
| 1256 | |
| 1257 | // Wraps original import to catch all exceptions and convert result to a |
| 1258 | // promise. |
| 1259 | // Seen as $suspending.wrappedfn in wasm. |
| 1260 | static bool WasmPIWrapSuspendingImport(JSContext* cx, unsigned argc, |
| 1261 | Value* vp) { |
| 1262 | CallArgs args = CallArgsFromVp(argc, vp); |
| 1263 | Rooted<JSFunction*> callee(cx, &args.callee().as<JSFunction>()); |
| 1264 | RootedValue originalImportFunc(cx, callee->getExtendedSlot(WRAPPED_FN_SLOT)); |
| 1265 | |
| 1266 | // Catching exceptions here. |
| 1267 | RootedValue rval(cx); |
| 1268 | if (Call(cx, UndefinedHandleValue, originalImportFunc, args, &rval)) { |
| 1269 | // Convert the result to a resolved promise later in AddPromiseReactions. |
| 1270 | args.rval().set(rval); |
| 1271 | return true; |
| 1272 | } |
| 1273 | |
| 1274 | // Deferring pending exception to the handler in the |
| 1275 | // $suspending.trampoline. |
| 1276 | return false; |
| 1277 | } |
| 1278 | |
| 1279 | JSFunction* WasmSuspendingFunctionCreate(JSContext* cx, HandleObject func, |
| 1280 | ValTypeVector&& params, |
| 1281 | ValTypeVector&& results) { |
| 1282 | MOZ_ASSERT(IsCallable(ObjectValue(*func)) &&do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsCallable(ObjectValue(*func)) && !IsCrossCompartmentWrapper (func))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(IsCallable(ObjectValue(*func)) && !IsCrossCompartmentWrapper (func)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("IsCallable(ObjectValue(*func)) && !IsCrossCompartmentWrapper(func)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1283); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsCallable(ObjectValue(*func)) && !IsCrossCompartmentWrapper(func)" ")"); do { *((volatile int*)__null) = 1283; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 1283 | !IsCrossCompartmentWrapper(func))do { static_assert( mozilla::detail::AssertionConditionType< decltype(IsCallable(ObjectValue(*func)) && !IsCrossCompartmentWrapper (func))>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(IsCallable(ObjectValue(*func)) && !IsCrossCompartmentWrapper (func)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("IsCallable(ObjectValue(*func)) && !IsCrossCompartmentWrapper(func)" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1283); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IsCallable(ObjectValue(*func)) && !IsCrossCompartmentWrapper(func)" ")"); do { *((volatile int*)__null) = 1283; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1284 | |
| 1285 | SuspendingFunctionModuleFactory moduleFactory; |
| 1286 | SharedModule module = |
| 1287 | moduleFactory.build(cx, func, std::move(params), std::move(results)); |
| 1288 | if (!module) { |
| 1289 | return nullptr; |
| 1290 | } |
| 1291 | |
| 1292 | // Instantiate the module. |
| 1293 | Rooted<ImportValues> imports(cx); |
| 1294 | |
| 1295 | // Add $suspending.wrappedfn to imports. |
| 1296 | RootedFunction funcWrapper( |
| 1297 | cx, NewNativeFunction(cx, WasmPIWrapSuspendingImport, 0, nullptr, |
| 1298 | gc::AllocKind::FUNCTION_EXTENDED, GenericObject)); |
| 1299 | if (!funcWrapper) { |
| 1300 | return nullptr; |
| 1301 | } |
| 1302 | funcWrapper->initExtendedSlot(WRAPPED_FN_SLOT, ObjectValue(*func)); |
| 1303 | if (!imports.get().funcs.append(funcWrapper)) { |
| 1304 | ReportOutOfMemory(cx); |
| 1305 | return nullptr; |
| 1306 | } |
| 1307 | |
| 1308 | Rooted<WasmInstanceObject*> instance(cx); |
| 1309 | if (!module->instantiate(cx, imports.get(), nullptr, &instance)) { |
| 1310 | // Can also trap on invalid input function. |
| 1311 | return nullptr; |
| 1312 | } |
| 1313 | |
| 1314 | // Returns the $suspending.exported function. |
| 1315 | RootedFunction wasmFunc(cx); |
| 1316 | if (!WasmInstanceObject::getExportedFunction( |
| 1317 | cx, instance, SuspendingFunctionModuleFactory::ExportedFnIndex, |
| 1318 | &wasmFunc)) { |
| 1319 | return nullptr; |
| 1320 | } |
| 1321 | return wasmFunc; |
| 1322 | } |
| 1323 | |
| 1324 | JSFunction* WasmSuspendingFunctionCreate(JSContext* cx, HandleObject func, |
| 1325 | const FuncType& type) { |
| 1326 | ValTypeVector params, results; |
| 1327 | if (!params.append(type.args().begin(), type.args().end()) || |
| 1328 | !results.append(type.results().begin(), type.results().end())) { |
| 1329 | ReportOutOfMemory(cx); |
| 1330 | return nullptr; |
| 1331 | } |
| 1332 | return WasmSuspendingFunctionCreate(cx, func, std::move(params), |
| 1333 | std::move(results)); |
| 1334 | } |
| 1335 | |
| 1336 | // Promising |
| 1337 | |
| 1338 | // Builds a wasm module with following structure: |
| 1339 | // (module |
| 1340 | // (type $params (struct (field ..)*)) |
| 1341 | // (type $results (struct (field ..)*)) |
| 1342 | // (type $create-suspender-result (struct (field externref externref))) |
| 1343 | // (import "" "" (func $promising.wrappedfn ..)) |
| 1344 | // (func $promising.exported .. ) |
| 1345 | // (func $promising.trampoline ..) |
| 1346 | // (export "" (func $promising.exported)) |
| 1347 | // ) |
| 1348 | // |
| 1349 | // The module provides logic for the Invoke Promising Import state transition |
| 1350 | // via $promising.exported and $promising.trampoline (see the SMDOC). |
| 1351 | // |
| 1352 | class PromisingFunctionModuleFactory { |
| 1353 | public: |
| 1354 | enum TypeIdx { |
| 1355 | ParamsTypeIndex, |
| 1356 | ResultsTypeIndex, |
| 1357 | }; |
| 1358 | |
| 1359 | enum FnIdx { |
| 1360 | WrappedFnIndex, |
| 1361 | ExportedFnIndex, |
| 1362 | TrampolineFnIndex, |
| 1363 | }; |
| 1364 | |
| 1365 | private: |
| 1366 | // Builds function that will be exported for JS: |
| 1367 | // (func $promising.exported |
| 1368 | // (param ..)* (result externref) |
| 1369 | // (local $suspender externref) |
| 1370 | // call $builtin.create-suspender |
| 1371 | // local.tee $suspender |
| 1372 | // call $builtin.create-promising-promise ;; -> (promise) |
| 1373 | // local.get $suspender |
| 1374 | // ref.func $promising.trampoline |
| 1375 | // local.get $i* |
| 1376 | // stuct.new $param-type |
| 1377 | // stack-switch SwitchToSuspendable ;; <- (suspender,fn,data) |
| 1378 | // ) |
| 1379 | bool encodeExportedFunction(CodeMetadata& codeMeta, uint32_t paramsSize, |
| 1380 | Bytes& bytecode) { |
| 1381 | Encoder encoder(bytecode, *codeMeta.types); |
| 1382 | ValTypeVector locals; |
| 1383 | if (!locals.emplaceBack(RefType::extern_())) { |
| 1384 | return false; |
| 1385 | } |
| 1386 | if (!EncodeLocalEntries(encoder, locals)) { |
| 1387 | return false; |
| 1388 | } |
| 1389 | |
| 1390 | const uint32_t SuspenderIndex = paramsSize; |
| 1391 | if (!encoder.writeOp(Op::I32Const) || !encoder.writeVarU32(0)) { |
| 1392 | return false; |
| 1393 | } |
| 1394 | if (!encoder.writeOp(MozOp::CallBuiltinModuleFunc) || |
| 1395 | !encoder.writeVarU32((uint32_t)BuiltinModuleFuncId::CreateSuspender)) { |
| 1396 | return false; |
| 1397 | } |
| 1398 | |
| 1399 | if (!encoder.writeOp(Op::LocalTee) || |
| 1400 | !encoder.writeVarU32(SuspenderIndex)) { |
| 1401 | return false; |
| 1402 | } |
| 1403 | if (!encoder.writeOp(MozOp::CallBuiltinModuleFunc) || |
| 1404 | !encoder.writeVarU32( |
| 1405 | (uint32_t)BuiltinModuleFuncId::CreatePromisingPromise)) { |
| 1406 | return false; |
| 1407 | } |
| 1408 | |
| 1409 | if (!encoder.writeOp(Op::LocalGet) || |
| 1410 | !encoder.writeVarU32(SuspenderIndex)) { |
| 1411 | return false; |
| 1412 | } |
| 1413 | if (!encoder.writeOp(Op::RefFunc) || |
| 1414 | !encoder.writeVarU32(TrampolineFnIndex)) { |
| 1415 | return false; |
| 1416 | } |
| 1417 | for (uint32_t i = 0; i < paramsSize; i++) { |
| 1418 | if (!encoder.writeOp(Op::LocalGet) || !encoder.writeVarU32(i)) { |
| 1419 | return false; |
| 1420 | } |
| 1421 | } |
| 1422 | if (!encoder.writeOp(GcOp::StructNew) || |
| 1423 | !encoder.writeVarU32(ParamsTypeIndex)) { |
| 1424 | return false; |
| 1425 | } |
| 1426 | if (!encoder.writeOp(MozOp::StackSwitch) || |
| 1427 | !encoder.writeVarU32(uint32_t(StackSwitchKind::SwitchToSuspendable))) { |
| 1428 | return false; |
| 1429 | } |
| 1430 | |
| 1431 | return encoder.writeOp(Op::End); |
| 1432 | } |
| 1433 | |
| 1434 | // Builds function that is called on alternative stack: |
| 1435 | // (func $promising.trampoline |
| 1436 | // (param $suspender externref) (param $params (ref $param-type)) |
| 1437 | // (result externref) |
| 1438 | // local.get $suspender ;; for call $set-results |
| 1439 | // (local.get $suspender)? |
| 1440 | // (struct.get $param-type $i (local.get $param))* |
| 1441 | // (local.get $suspender)? |
| 1442 | // call $promising.wrappedfn |
| 1443 | // struct.new $result-type |
| 1444 | // call $builtin.set-promising-promise-results |
| 1445 | // ) |
| 1446 | bool encodeTrampolineFunction(CodeMetadata& codeMeta, uint32_t paramsSize, |
| 1447 | Bytes& bytecode) { |
| 1448 | Encoder encoder(bytecode, *codeMeta.types); |
| 1449 | if (!EncodeLocalEntries(encoder, ValTypeVector())) { |
| 1450 | return false; |
| 1451 | } |
| 1452 | const uint32_t SuspenderIndex = 0; |
| 1453 | const uint32_t ParamsIndex = 1; |
| 1454 | |
| 1455 | // Reserved for SetResultsFnIndex call at the end |
| 1456 | if (!encoder.writeOp(Op::LocalGet) || |
| 1457 | !encoder.writeVarU32(SuspenderIndex)) { |
| 1458 | return false; |
| 1459 | } |
| 1460 | |
| 1461 | for (uint32_t i = 0; i < paramsSize; i++) { |
| 1462 | if (!encoder.writeOp(Op::LocalGet) || !encoder.writeVarU32(ParamsIndex)) { |
| 1463 | return false; |
| 1464 | } |
| 1465 | if (!encoder.writeOp(GcOp::StructGet) || |
| 1466 | !encoder.writeVarU32(ParamsTypeIndex) || !encoder.writeVarU32(i)) { |
| 1467 | return false; |
| 1468 | } |
| 1469 | } |
| 1470 | if (!encoder.writeOp(Op::Call) || !encoder.writeVarU32(WrappedFnIndex)) { |
| 1471 | return false; |
| 1472 | } |
| 1473 | |
| 1474 | if (!encoder.writeOp(GcOp::StructNew) || |
| 1475 | !encoder.writeVarU32(ResultsTypeIndex)) { |
| 1476 | return false; |
| 1477 | } |
| 1478 | if (!encoder.writeOp(MozOp::CallBuiltinModuleFunc) || |
| 1479 | !encoder.writeVarU32( |
| 1480 | (uint32_t)BuiltinModuleFuncId::SetPromisingPromiseResults)) { |
| 1481 | return false; |
| 1482 | } |
| 1483 | |
| 1484 | return encoder.writeOp(Op::End); |
| 1485 | } |
| 1486 | |
| 1487 | public: |
| 1488 | SharedModule build(JSContext* cx, HandleFunction fn, ValTypeVector&& params, |
| 1489 | ValTypeVector&& results) { |
| 1490 | const FuncType& fnType = fn->wasmTypeDef()->funcType(); |
| 1491 | size_t paramsSize = params.length(); |
| 1492 | |
| 1493 | RefType suspenderType = RefType::extern_(); |
| 1494 | |
| 1495 | FeatureOptions options; |
| 1496 | options.isBuiltinModule = true; |
| 1497 | |
| 1498 | ScriptedCaller scriptedCaller; |
| 1499 | SharedCompileArgs compileArgs = |
| 1500 | CompileArgs::buildAndReport(cx, std::move(scriptedCaller), options); |
| 1501 | if (!compileArgs) { |
| 1502 | return nullptr; |
| 1503 | } |
| 1504 | |
| 1505 | MutableModuleMetadata moduleMeta = js_new<ModuleMetadata>(); |
| 1506 | if (!moduleMeta || !moduleMeta->init(*compileArgs)) { |
| 1507 | return nullptr; |
| 1508 | } |
| 1509 | MutableCodeMetadata codeMeta = moduleMeta->codeMeta; |
| 1510 | |
| 1511 | MOZ_ASSERT(IonPlatformSupport())do { static_assert( mozilla::detail::AssertionConditionType< decltype(IonPlatformSupport())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(IonPlatformSupport()))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("IonPlatformSupport()" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1511); AnnotateMozCrashReason("MOZ_ASSERT" "(" "IonPlatformSupport()" ")"); do { *((volatile int*)__null) = 1511; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1512 | CompilerEnvironment compilerEnv(CompileMode::Once, Tier::Optimized, |
| 1513 | DebugEnabled::False); |
| 1514 | compilerEnv.computeParameters(); |
| 1515 | |
| 1516 | StructType boxedParamsStruct; |
| 1517 | if (!StructType::createImmutable(params, &boxedParamsStruct)) { |
| 1518 | ReportOutOfMemory(cx); |
| 1519 | return nullptr; |
| 1520 | } |
| 1521 | MOZ_ASSERT(codeMeta->types->length() == ParamsTypeIndex)do { static_assert( mozilla::detail::AssertionConditionType< decltype(codeMeta->types->length() == ParamsTypeIndex)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(codeMeta->types->length() == ParamsTypeIndex)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("codeMeta->types->length() == ParamsTypeIndex" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1521); AnnotateMozCrashReason("MOZ_ASSERT" "(" "codeMeta->types->length() == ParamsTypeIndex" ")"); do { *((volatile int*)__null) = 1521; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1522 | if (!codeMeta->types->addType(std::move(boxedParamsStruct))) { |
| 1523 | return nullptr; |
| 1524 | } |
| 1525 | |
| 1526 | StructType boxedResultType; |
| 1527 | if (!StructType::createImmutable(fnType.results(), &boxedResultType)) { |
| 1528 | ReportOutOfMemory(cx); |
| 1529 | return nullptr; |
| 1530 | } |
| 1531 | MOZ_ASSERT(codeMeta->types->length() == ResultsTypeIndex)do { static_assert( mozilla::detail::AssertionConditionType< decltype(codeMeta->types->length() == ResultsTypeIndex) >::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(codeMeta->types->length() == ResultsTypeIndex) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("codeMeta->types->length() == ResultsTypeIndex" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1531); AnnotateMozCrashReason("MOZ_ASSERT" "(" "codeMeta->types->length() == ResultsTypeIndex" ")"); do { *((volatile int*)__null) = 1531; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1532 | if (!codeMeta->types->addType(std::move(boxedResultType))) { |
| 1533 | return nullptr; |
| 1534 | } |
| 1535 | |
| 1536 | ValTypeVector paramsForWrapper, resultsForWrapper; |
| 1537 | if (!paramsForWrapper.append(fnType.args().begin(), fnType.args().end()) || |
| 1538 | !resultsForWrapper.append(fnType.results().begin(), |
| 1539 | fnType.results().end())) { |
| 1540 | ReportOutOfMemory(cx); |
| 1541 | return nullptr; |
| 1542 | } |
| 1543 | MOZ_ASSERT(codeMeta->funcs.length() == WrappedFnIndex)do { static_assert( mozilla::detail::AssertionConditionType< decltype(codeMeta->funcs.length() == WrappedFnIndex)>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(codeMeta->funcs.length() == WrappedFnIndex))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("codeMeta->funcs.length() == WrappedFnIndex" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1543); AnnotateMozCrashReason("MOZ_ASSERT" "(" "codeMeta->funcs.length() == WrappedFnIndex" ")"); do { *((volatile int*)__null) = 1543; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1544 | if (!moduleMeta->addDefinedFunc(std::move(paramsForWrapper), |
| 1545 | std::move(resultsForWrapper))) { |
| 1546 | return nullptr; |
| 1547 | } |
| 1548 | |
| 1549 | // Imports names are not important, declare functions above as imports. |
| 1550 | codeMeta->numFuncImports = codeMeta->funcs.length(); |
| 1551 | |
| 1552 | // We will be looking up and using the exports function by index so |
| 1553 | // the name doesn't matter. |
| 1554 | MOZ_ASSERT(codeMeta->funcs.length() == ExportedFnIndex)do { static_assert( mozilla::detail::AssertionConditionType< decltype(codeMeta->funcs.length() == ExportedFnIndex)>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(codeMeta->funcs.length() == ExportedFnIndex))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("codeMeta->funcs.length() == ExportedFnIndex" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1554); AnnotateMozCrashReason("MOZ_ASSERT" "(" "codeMeta->funcs.length() == ExportedFnIndex" ")"); do { *((volatile int*)__null) = 1554; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1555 | if (!moduleMeta->addDefinedFunc(std::move(params), std::move(results), |
| 1556 | /* declareFoRef = */ true, |
| 1557 | mozilla::Some(CacheableName()))) { |
| 1558 | return nullptr; |
| 1559 | } |
| 1560 | |
| 1561 | ValTypeVector paramsTrampoline, resultsTrampoline; |
| 1562 | if (!paramsTrampoline.emplaceBack(suspenderType) || |
| 1563 | !paramsTrampoline.emplaceBack(RefType::fromTypeDef( |
| 1564 | &(*codeMeta->types)[ParamsTypeIndex], false))) { |
| 1565 | ReportOutOfMemory(cx); |
| 1566 | return nullptr; |
| 1567 | } |
| 1568 | MOZ_ASSERT(codeMeta->funcs.length() == TrampolineFnIndex)do { static_assert( mozilla::detail::AssertionConditionType< decltype(codeMeta->funcs.length() == TrampolineFnIndex)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(codeMeta->funcs.length() == TrampolineFnIndex))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("codeMeta->funcs.length() == TrampolineFnIndex" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1568); AnnotateMozCrashReason("MOZ_ASSERT" "(" "codeMeta->funcs.length() == TrampolineFnIndex" ")"); do { *((volatile int*)__null) = 1568; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1569 | if (!moduleMeta->addDefinedFunc(std::move(paramsTrampoline), |
| 1570 | std::move(resultsTrampoline), |
| 1571 | /* declareFoRef = */ true)) { |
| 1572 | return nullptr; |
| 1573 | } |
| 1574 | |
| 1575 | if (!moduleMeta->prepareForCompile(compilerEnv.mode())) { |
| 1576 | return nullptr; |
| 1577 | } |
| 1578 | |
| 1579 | ModuleGenerator mg(*codeMeta, compilerEnv, compilerEnv.initialState(), |
| 1580 | nullptr, nullptr, nullptr); |
| 1581 | if (!mg.initializeCompleteTier()) { |
| 1582 | return nullptr; |
| 1583 | } |
| 1584 | // Build functions and keep bytecodes around until the end. |
| 1585 | Bytes bytecode; |
| 1586 | uint32_t funcBytecodeOffset = CallSite::FIRST_VALID_BYTECODE_OFFSET; |
| 1587 | if (!encodeExportedFunction(*codeMeta, paramsSize, bytecode)) { |
| 1588 | ReportOutOfMemory(cx); |
| 1589 | return nullptr; |
| 1590 | } |
| 1591 | if (!mg.compileFuncDef(ExportedFnIndex, funcBytecodeOffset, |
| 1592 | bytecode.begin(), |
| 1593 | bytecode.begin() + bytecode.length())) { |
| 1594 | return nullptr; |
| 1595 | } |
| 1596 | funcBytecodeOffset += bytecode.length(); |
| 1597 | |
| 1598 | Bytes bytecode2; |
| 1599 | if (!encodeTrampolineFunction(*codeMeta, paramsSize, bytecode2)) { |
| 1600 | ReportOutOfMemory(cx); |
| 1601 | return nullptr; |
| 1602 | } |
| 1603 | if (!mg.compileFuncDef(TrampolineFnIndex, funcBytecodeOffset, |
| 1604 | bytecode2.begin(), |
| 1605 | bytecode2.begin() + bytecode2.length())) { |
| 1606 | return nullptr; |
| 1607 | } |
| 1608 | funcBytecodeOffset += bytecode2.length(); |
| 1609 | |
| 1610 | if (!mg.finishFuncDefs()) { |
| 1611 | return nullptr; |
| 1612 | } |
| 1613 | |
| 1614 | SharedBytes shareableBytes = js_new<ShareableBytes>(); |
| 1615 | if (!shareableBytes) { |
| 1616 | ReportOutOfMemory(cx); |
| 1617 | return nullptr; |
| 1618 | } |
| 1619 | return mg.finishModule(*shareableBytes, moduleMeta, |
| 1620 | /*maybeCompleteTier2Listener=*/nullptr); |
| 1621 | } |
| 1622 | }; |
| 1623 | |
| 1624 | // Wraps call to wasm $promising.exported function to catch an exception and |
| 1625 | // return a promise instead. |
| 1626 | static bool WasmPIPromisingFunction(JSContext* cx, unsigned argc, Value* vp) { |
| 1627 | CallArgs args = CallArgsFromVp(argc, vp); |
| 1628 | Rooted<JSFunction*> callee(cx, &args.callee().as<JSFunction>()); |
| 1629 | RootedFunction fn( |
| 1630 | cx, |
| 1631 | &callee->getExtendedSlot(WRAPPED_FN_SLOT).toObject().as<JSFunction>()); |
| 1632 | |
| 1633 | // Catching exceptions here. |
| 1634 | if (Call(cx, UndefinedHandleValue, fn, args, args.rval())) { |
| 1635 | return true; |
| 1636 | } |
| 1637 | |
| 1638 | // During an exception the stack was unwound -- time to release resources. |
| 1639 | CleanupActiveSuspender(cx); |
| 1640 | |
| 1641 | if (cx->isThrowingOutOfMemory()) { |
| 1642 | return false; |
| 1643 | } |
| 1644 | |
| 1645 | RootedObject promiseObject(cx, NewPromiseObject(cx, nullptr)); |
| 1646 | if (!promiseObject) { |
| 1647 | return false; |
| 1648 | } |
| 1649 | args.rval().setObject(*promiseObject); |
| 1650 | |
| 1651 | Rooted<PromiseObject*> promise(cx, &promiseObject->as<PromiseObject>()); |
| 1652 | return RejectPromiseWithPendingError(cx, promise); |
| 1653 | } |
| 1654 | |
| 1655 | JSFunction* WasmPromisingFunctionCreate(JSContext* cx, HandleObject func, |
| 1656 | ValTypeVector&& params, |
| 1657 | ValTypeVector&& results) { |
| 1658 | RootedFunction wrappedWasmFunc(cx, &func->as<JSFunction>()); |
| 1659 | MOZ_ASSERT(wrappedWasmFunc->isWasm())do { static_assert( mozilla::detail::AssertionConditionType< decltype(wrappedWasmFunc->isWasm())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(wrappedWasmFunc->isWasm() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "wrappedWasmFunc->isWasm()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1659); AnnotateMozCrashReason("MOZ_ASSERT" "(" "wrappedWasmFunc->isWasm()" ")"); do { *((volatile int*)__null) = 1659; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1660 | const FuncType& wrappedWasmFuncType = |
| 1661 | wrappedWasmFunc->wasmTypeDef()->funcType(); |
| 1662 | |
| 1663 | MOZ_ASSERT(results.length() == 0 && params.length() == 0)do { static_assert( mozilla::detail::AssertionConditionType< decltype(results.length() == 0 && params.length() == 0 )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(results.length() == 0 && params.length() == 0 ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "results.length() == 0 && params.length() == 0", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1663); AnnotateMozCrashReason("MOZ_ASSERT" "(" "results.length() == 0 && params.length() == 0" ")"); do { *((volatile int*)__null) = 1663; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1664 | if (!results.append(RefType::extern_())) { |
| 1665 | ReportOutOfMemory(cx); |
| 1666 | return nullptr; |
| 1667 | } |
| 1668 | if (!params.append(wrappedWasmFuncType.args().begin(), |
| 1669 | wrappedWasmFuncType.args().end())) { |
| 1670 | ReportOutOfMemory(cx); |
| 1671 | return nullptr; |
| 1672 | } |
| 1673 | |
| 1674 | PromisingFunctionModuleFactory moduleFactory; |
| 1675 | SharedModule module = moduleFactory.build( |
| 1676 | cx, wrappedWasmFunc, std::move(params), std::move(results)); |
| 1677 | // Instantiate the module. |
| 1678 | Rooted<ImportValues> imports(cx); |
| 1679 | |
| 1680 | // Add wrapped function ($promising.wrappedfn) to imports. |
| 1681 | if (!imports.get().funcs.append(func)) { |
| 1682 | ReportOutOfMemory(cx); |
| 1683 | return nullptr; |
| 1684 | } |
| 1685 | |
| 1686 | Rooted<WasmInstanceObject*> instance(cx); |
| 1687 | if (!module->instantiate(cx, imports.get(), nullptr, &instance)) { |
| 1688 | MOZ_ASSERT(cx->isThrowingOutOfMemory())do { static_assert( mozilla::detail::AssertionConditionType< decltype(cx->isThrowingOutOfMemory())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(cx->isThrowingOutOfMemory ()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("cx->isThrowingOutOfMemory()", "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1688); AnnotateMozCrashReason("MOZ_ASSERT" "(" "cx->isThrowingOutOfMemory()" ")"); do { *((volatile int*)__null) = 1688; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1689 | return nullptr; |
| 1690 | } |
| 1691 | |
| 1692 | // Wrap $promising.exported function for exceptions/traps handling. |
| 1693 | RootedFunction wasmFunc(cx); |
| 1694 | if (!WasmInstanceObject::getExportedFunction( |
| 1695 | cx, instance, PromisingFunctionModuleFactory::ExportedFnIndex, |
| 1696 | &wasmFunc)) { |
| 1697 | return nullptr; |
| 1698 | } |
| 1699 | |
| 1700 | RootedFunction wasmFuncWrapper( |
| 1701 | cx, NewNativeFunction(cx, WasmPIPromisingFunction, 0, nullptr, |
| 1702 | gc::AllocKind::FUNCTION_EXTENDED, GenericObject)); |
| 1703 | if (!wasmFuncWrapper) { |
| 1704 | return nullptr; |
| 1705 | } |
| 1706 | wasmFuncWrapper->initExtendedSlot(WRAPPED_FN_SLOT, ObjectValue(*wasmFunc)); |
| 1707 | return wasmFuncWrapper; |
| 1708 | } |
| 1709 | |
| 1710 | // Gets active suspender. |
| 1711 | // The reserved parameter is a workaround for limitation in the |
| 1712 | // WasmBuiltinModule.yaml generator to always have params. |
| 1713 | // Seen as $builtin.current-suspender to wasm. |
| 1714 | SuspenderObject* CurrentSuspender(Instance* instance, int32_t reserved) { |
| 1715 | MOZ_ASSERT(SASigCurrentSuspender.failureMode == FailureMode::FailOnNullPtr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigCurrentSuspender.failureMode == FailureMode::FailOnNullPtr )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(SASigCurrentSuspender.failureMode == FailureMode::FailOnNullPtr ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "SASigCurrentSuspender.failureMode == FailureMode::FailOnNullPtr" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1715); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigCurrentSuspender.failureMode == FailureMode::FailOnNullPtr" ")"); do { *((volatile int*)__null) = 1715; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1716 | JSContext* cx = instance->cx(); |
| 1717 | SuspenderObject* suspender = cx->wasm().promiseIntegration.activeSuspender(); |
| 1718 | if (!suspender) { |
| 1719 | JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, |
| 1720 | JSMSG_JSPI_INVALID_STATE); |
| 1721 | return nullptr; |
| 1722 | } |
| 1723 | return suspender; |
| 1724 | } |
| 1725 | |
| 1726 | // Creates a suspender and promise (that will be returned to JS code). |
| 1727 | // Seen as $builtin.create-suspender to wasm. |
| 1728 | SuspenderObject* CreateSuspender(Instance* instance, int32_t reserved) { |
| 1729 | MOZ_ASSERT(SASigCreateSuspender.failureMode == FailureMode::FailOnNullPtr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigCreateSuspender.failureMode == FailureMode::FailOnNullPtr )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(SASigCreateSuspender.failureMode == FailureMode::FailOnNullPtr ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "SASigCreateSuspender.failureMode == FailureMode::FailOnNullPtr" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1729); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigCreateSuspender.failureMode == FailureMode::FailOnNullPtr" ")"); do { *((volatile int*)__null) = 1729; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1730 | JSContext* cx = instance->cx(); |
| 1731 | return SuspenderObject::create(cx); |
| 1732 | } |
| 1733 | |
| 1734 | // Creates a promise that will be returned at promising call. |
| 1735 | // Seen as $builtin.create-promising-promise to wasm. |
| 1736 | PromiseObject* CreatePromisingPromise(Instance* instance, |
| 1737 | SuspenderObject* suspender) { |
| 1738 | MOZ_ASSERT(SASigCreatePromisingPromise.failureMode ==do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigCreatePromisingPromise.failureMode == FailureMode ::FailOnNullPtr)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(SASigCreatePromisingPromise.failureMode == FailureMode::FailOnNullPtr))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("SASigCreatePromisingPromise.failureMode == FailureMode::FailOnNullPtr" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1739); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigCreatePromisingPromise.failureMode == FailureMode::FailOnNullPtr" ")"); do { *((volatile int*)__null) = 1739; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 1739 | FailureMode::FailOnNullPtr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigCreatePromisingPromise.failureMode == FailureMode ::FailOnNullPtr)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(SASigCreatePromisingPromise.failureMode == FailureMode::FailOnNullPtr))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("SASigCreatePromisingPromise.failureMode == FailureMode::FailOnNullPtr" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1739); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigCreatePromisingPromise.failureMode == FailureMode::FailOnNullPtr" ")"); do { *((volatile int*)__null) = 1739; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1740 | JSContext* cx = instance->cx(); |
| 1741 | |
| 1742 | Rooted<SuspenderObject*> suspenderObject(cx, suspender); |
| 1743 | RootedObject promiseObject(cx, NewPromiseObject(cx, nullptr)); |
| 1744 | if (!promiseObject) { |
| 1745 | return nullptr; |
| 1746 | } |
| 1747 | |
| 1748 | Rooted<PromiseObject*> promise(cx, &promiseObject->as<PromiseObject>()); |
| 1749 | suspenderObject->setPromisingPromise(promise); |
| 1750 | return promise.get(); |
| 1751 | } |
| 1752 | |
| 1753 | // Converts promise results into actual function result, or exception/trap |
| 1754 | // if rejected. |
| 1755 | // Seen as $builtin.get-suspending-promise-result to wasm. |
| 1756 | JSObject* GetSuspendingPromiseResult(Instance* instance, void* result, |
| 1757 | SuspenderObject* suspender) { |
| 1758 | MOZ_ASSERT(SASigGetSuspendingPromiseResult.failureMode ==do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigGetSuspendingPromiseResult.failureMode == FailureMode ::FailOnNullPtr)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(SASigGetSuspendingPromiseResult .failureMode == FailureMode::FailOnNullPtr))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("SASigGetSuspendingPromiseResult.failureMode == FailureMode::FailOnNullPtr" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1759); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigGetSuspendingPromiseResult.failureMode == FailureMode::FailOnNullPtr" ")"); do { *((volatile int*)__null) = 1759; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 1759 | FailureMode::FailOnNullPtr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigGetSuspendingPromiseResult.failureMode == FailureMode ::FailOnNullPtr)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(SASigGetSuspendingPromiseResult .failureMode == FailureMode::FailOnNullPtr))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("SASigGetSuspendingPromiseResult.failureMode == FailureMode::FailOnNullPtr" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1759); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigGetSuspendingPromiseResult.failureMode == FailureMode::FailOnNullPtr" ")"); do { *((volatile int*)__null) = 1759; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1760 | JSContext* cx = instance->cx(); |
| 1761 | Rooted<SuspenderObject*> suspenderObject(cx, suspender); |
| 1762 | RootedAnyRef resultRef(cx, AnyRef::fromCompiledCode(result)); |
| 1763 | |
| 1764 | SuspenderObject::ReturnType returnType = |
| 1765 | suspenderObject->suspendingReturnType(); |
| 1766 | MOZ_ASSERT(returnType != SuspenderObject::ReturnType::Unknown)do { static_assert( mozilla::detail::AssertionConditionType< decltype(returnType != SuspenderObject::ReturnType::Unknown)> ::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(returnType != SuspenderObject::ReturnType::Unknown)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("returnType != SuspenderObject::ReturnType::Unknown" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1766); AnnotateMozCrashReason("MOZ_ASSERT" "(" "returnType != SuspenderObject::ReturnType::Unknown" ")"); do { *((volatile int*)__null) = 1766; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1767 | Rooted<PromiseObject*> promise( |
| 1768 | cx, returnType == SuspenderObject::ReturnType::Promise |
| 1769 | ? &resultRef.toJSObject().as<PromiseObject>() |
| 1770 | : nullptr); |
| 1771 | |
| 1772 | # ifdef DEBUG1 |
| 1773 | auto resetReturnType = mozilla::MakeScopeExit([&suspenderObject]() { |
| 1774 | suspenderObject->setSuspendingReturnType( |
| 1775 | SuspenderObject::ReturnType::Unknown); |
| 1776 | }); |
| 1777 | # endif |
| 1778 | |
| 1779 | if (promise ? promise->state() == JS::PromiseState::Rejected |
| 1780 | : returnType == SuspenderObject::ReturnType::Exception) { |
| 1781 | // Promise was rejected or an exception was thrown, set pending exception |
| 1782 | // and fail. |
| 1783 | RootedValue reason( |
| 1784 | cx, promise ? promise->reason() : resultRef.get().toJSValue()); |
| 1785 | cx->setPendingException(reason, ShouldCaptureStack::Maybe); |
| 1786 | return nullptr; |
| 1787 | } |
| 1788 | |
| 1789 | // Construct the results object. |
| 1790 | Rooted<WasmStructObject*> results( |
| 1791 | cx, instance->constantStructNewDefault( |
| 1792 | cx, SuspendingFunctionModuleFactory::ResultsTypeIndex)); |
| 1793 | const FieldTypeVector& fields = results->typeDef().structType().fields_; |
| 1794 | |
| 1795 | if (fields.length() > 0) { |
| 1796 | MOZ_ASSERT_IF(promise, promise->state() == JS::PromiseState::Fulfilled)do { if (promise) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(promise->state() == JS::PromiseState::Fulfilled )>::isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(promise->state() == JS::PromiseState::Fulfilled)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("promise->state() == JS::PromiseState::Fulfilled" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1796); AnnotateMozCrashReason("MOZ_ASSERT" "(" "promise->state() == JS::PromiseState::Fulfilled" ")"); do { *((volatile int*)__null) = 1796; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
| 1797 | RootedValue jsValue(cx); |
| 1798 | if (promise) { |
| 1799 | jsValue.set(promise->value()); |
| 1800 | } else { |
| 1801 | jsValue.set(resultRef.get().toJSValue()); |
| 1802 | } |
| 1803 | |
| 1804 | // The struct object is constructed based on returns of exported function. |
| 1805 | // It is the only way we can get ValType for Val::fromJSValue call. |
| 1806 | const wasm::FuncType& sig = instance->codeMeta().getFuncType( |
| 1807 | SuspendingFunctionModuleFactory::ExportedFnIndex); |
| 1808 | |
| 1809 | if (fields.length() == 1) { |
| 1810 | RootedVal val(cx); |
| 1811 | MOZ_ASSERT(sig.result(0).storageType() == fields[0].type)do { static_assert( mozilla::detail::AssertionConditionType< decltype(sig.result(0).storageType() == fields[0].type)>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(sig.result(0).storageType() == fields[0].type))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("sig.result(0).storageType() == fields[0].type" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1811); AnnotateMozCrashReason("MOZ_ASSERT" "(" "sig.result(0).storageType() == fields[0].type" ")"); do { *((volatile int*)__null) = 1811; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1812 | if (!Val::fromJSValue(cx, sig.result(0), jsValue, &val)) { |
| 1813 | return nullptr; |
| 1814 | } |
| 1815 | results->storeVal(val, 0); |
| 1816 | } else { |
| 1817 | // The multi-value result is wrapped into ArrayObject/Iterable. |
| 1818 | Rooted<ArrayObject*> array(cx); |
| 1819 | if (!IterableToArray(cx, jsValue, &array)) { |
| 1820 | return nullptr; |
| 1821 | } |
| 1822 | if (fields.length() != array->length()) { |
| 1823 | UniqueChars expected(JS_smprintf("%zu", fields.length())); |
| 1824 | UniqueChars got(JS_smprintf("%u", array->length())); |
| 1825 | if (!expected || !got) { |
| 1826 | ReportOutOfMemory(cx); |
| 1827 | return nullptr; |
| 1828 | } |
| 1829 | |
| 1830 | JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr, |
| 1831 | JSMSG_WASM_WRONG_NUMBER_OF_VALUES, |
| 1832 | expected.get(), got.get()); |
| 1833 | return nullptr; |
| 1834 | } |
| 1835 | |
| 1836 | for (size_t i = 0; i < fields.length(); i++) { |
| 1837 | RootedVal val(cx); |
| 1838 | RootedValue v(cx, array->getDenseElement(i)); |
| 1839 | MOZ_ASSERT(sig.result(i).storageType() == fields[i].type)do { static_assert( mozilla::detail::AssertionConditionType< decltype(sig.result(i).storageType() == fields[i].type)>:: isValid, "invalid assertion condition"); if ((__builtin_expect (!!(!(!!(sig.result(i).storageType() == fields[i].type))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("sig.result(i).storageType() == fields[i].type" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1839); AnnotateMozCrashReason("MOZ_ASSERT" "(" "sig.result(i).storageType() == fields[i].type" ")"); do { *((volatile int*)__null) = 1839; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1840 | if (!Val::fromJSValue(cx, sig.result(i), v, &val)) { |
| 1841 | return nullptr; |
| 1842 | } |
| 1843 | results->storeVal(val, i); |
| 1844 | } |
| 1845 | } |
| 1846 | } |
| 1847 | return results; |
| 1848 | } |
| 1849 | |
| 1850 | // Collects returned suspending promising, and registers callbacks to |
| 1851 | // react on it using WasmPISuspendTaskContinue. |
| 1852 | // Seen as $builtin.add-promise-reactions to wasm. |
| 1853 | void* AddPromiseReactions(Instance* instance, SuspenderObject* suspender, |
| 1854 | void* result, JSFunction* continueOnSuspendable) { |
| 1855 | MOZ_ASSERT(SASigAddPromiseReactions.failureMode ==do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigAddPromiseReactions.failureMode == FailureMode:: FailOnInvalidRef)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(SASigAddPromiseReactions.failureMode == FailureMode::FailOnInvalidRef))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("SASigAddPromiseReactions.failureMode == FailureMode::FailOnInvalidRef" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1856); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigAddPromiseReactions.failureMode == FailureMode::FailOnInvalidRef" ")"); do { *((volatile int*)__null) = 1856; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 1856 | FailureMode::FailOnInvalidRef)do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigAddPromiseReactions.failureMode == FailureMode:: FailOnInvalidRef)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(SASigAddPromiseReactions.failureMode == FailureMode::FailOnInvalidRef))), 0))) { do { } while (false ); MOZ_ReportAssertionFailure("SASigAddPromiseReactions.failureMode == FailureMode::FailOnInvalidRef" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1856); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigAddPromiseReactions.failureMode == FailureMode::FailOnInvalidRef" ")"); do { *((volatile int*)__null) = 1856; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1857 | JSContext* cx = instance->cx(); |
| 1858 | |
| 1859 | RootedAnyRef resultRef(cx, AnyRef::fromCompiledCode(result)); |
| 1860 | RootedValue resultValue(cx, resultRef.get().toJSValue()); |
| 1861 | Rooted<SuspenderObject*> suspenderObject(cx, suspender); |
| 1862 | RootedFunction fn(cx, continueOnSuspendable); |
| 1863 | |
| 1864 | if (!IsPromiseValue(cx, resultValue)) { |
| 1865 | suspenderObject->forwardToSuspendable(); |
| 1866 | suspenderObject->setSuspendingReturnType( |
| 1867 | SuspenderObject::ReturnType::Value); |
| 1868 | return resultRef.get().forCompiledCode(); |
| 1869 | } |
| 1870 | |
| 1871 | // Wrap a promise. |
| 1872 | RootedObject promiseConstructor(cx, GetPromiseConstructor(cx)); |
| 1873 | RootedObject promiseObj(cx, |
| 1874 | PromiseResolve(cx, promiseConstructor, resultValue)); |
| 1875 | if (!promiseObj) { |
| 1876 | return AnyRef::invalid().forCompiledCode(); |
| 1877 | } |
| 1878 | Rooted<PromiseObject*> promiseObject(cx, &promiseObj->as<PromiseObject>()); |
| 1879 | |
| 1880 | suspenderObject->setSuspendingReturnType( |
| 1881 | SuspenderObject::ReturnType::Promise); |
| 1882 | |
| 1883 | // Add promise reactions |
| 1884 | RootedFunction then_( |
| 1885 | cx, NewNativeFunction(cx, WasmPISuspendTaskContinue, 1, nullptr, |
| 1886 | gc::AllocKind::FUNCTION_EXTENDED, GenericObject)); |
| 1887 | then_->initExtendedSlot(SUSPENDER_SLOT, ObjectValue(*suspenderObject)); |
| 1888 | then_->initExtendedSlot(CONTINUE_ON_SUSPENDABLE_SLOT, ObjectValue(*fn)); |
| 1889 | then_->initExtendedSlot(PROMISE_SLOT, ObjectValue(*promiseObject)); |
| 1890 | if (!JS::AddPromiseReactions(cx, promiseObject, then_, then_)) { |
| 1891 | return AnyRef::invalid().forCompiledCode(); |
| 1892 | } |
| 1893 | return AnyRef::fromJSObject(*promiseObject).forCompiledCode(); |
| 1894 | } |
| 1895 | |
| 1896 | // Changes exit stack frame pointers to suspendable stack and recast exception |
| 1897 | // to wasm reference. Seen as $builtin.forward-exn-to-suspended to wasm. |
| 1898 | void* ForwardExceptionToSuspended(Instance* instance, |
| 1899 | SuspenderObject* suspender, void* exception) { |
| 1900 | MOZ_ASSERT(SASigForwardExceptionToSuspended.failureMode ==do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigForwardExceptionToSuspended.failureMode == FailureMode ::Infallible)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(SASigForwardExceptionToSuspended. failureMode == FailureMode::Infallible))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("SASigForwardExceptionToSuspended.failureMode == FailureMode::Infallible" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1901); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigForwardExceptionToSuspended.failureMode == FailureMode::Infallible" ")"); do { *((volatile int*)__null) = 1901; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 1901 | FailureMode::Infallible)do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigForwardExceptionToSuspended.failureMode == FailureMode ::Infallible)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(SASigForwardExceptionToSuspended. failureMode == FailureMode::Infallible))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("SASigForwardExceptionToSuspended.failureMode == FailureMode::Infallible" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1901); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigForwardExceptionToSuspended.failureMode == FailureMode::Infallible" ")"); do { *((volatile int*)__null) = 1901; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1902 | |
| 1903 | suspender->forwardToSuspendable(); |
| 1904 | suspender->setSuspendingReturnType(SuspenderObject::ReturnType::Exception); |
| 1905 | return exception; |
| 1906 | } |
| 1907 | |
| 1908 | // Resolves the promise using results packed by wasm. |
| 1909 | // Seen as $builtin.set-promising-promise-results to wasm. |
| 1910 | int32_t SetPromisingPromiseResults(Instance* instance, |
| 1911 | SuspenderObject* suspender, |
| 1912 | WasmStructObject* results) { |
| 1913 | MOZ_ASSERT(SASigSetPromisingPromiseResults.failureMode ==do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigSetPromisingPromiseResults.failureMode == FailureMode ::FailOnNegI32)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(SASigSetPromisingPromiseResults .failureMode == FailureMode::FailOnNegI32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("SASigSetPromisingPromiseResults.failureMode == FailureMode::FailOnNegI32" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1914); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigSetPromisingPromiseResults.failureMode == FailureMode::FailOnNegI32" ")"); do { *((volatile int*)__null) = 1914; __attribute__((nomerge )) ::abort(); } while (false); } } while (false) |
| 1914 | FailureMode::FailOnNegI32)do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigSetPromisingPromiseResults.failureMode == FailureMode ::FailOnNegI32)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(SASigSetPromisingPromiseResults .failureMode == FailureMode::FailOnNegI32))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("SASigSetPromisingPromiseResults.failureMode == FailureMode::FailOnNegI32" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1914); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigSetPromisingPromiseResults.failureMode == FailureMode::FailOnNegI32" ")"); do { *((volatile int*)__null) = 1914; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1915 | JSContext* cx = instance->cx(); |
| 1916 | Rooted<WasmStructObject*> res(cx, results); |
| 1917 | Rooted<SuspenderObject*> suspenderObject(cx, suspender); |
| 1918 | RootedObject promise(cx, suspenderObject->promisingPromise()); |
| 1919 | |
| 1920 | const StructType& resultType = res->typeDef().structType(); |
| 1921 | RootedValue val(cx); |
| 1922 | // Unbox the result value from the struct, if any. |
| 1923 | switch (resultType.fields_.length()) { |
| 1924 | case 0: |
| 1925 | break; |
| 1926 | case 1: { |
| 1927 | if (!res->getField(cx, /*index=*/0, &val)) { |
| 1928 | return false; |
| 1929 | } |
| 1930 | } break; |
| 1931 | default: { |
| 1932 | Rooted<ArrayObject*> array(cx, NewDenseEmptyArray(cx)); |
| 1933 | if (!array) { |
| 1934 | return false; |
| 1935 | } |
| 1936 | for (size_t i = 0; i < resultType.fields_.length(); i++) { |
| 1937 | RootedValue item(cx); |
| 1938 | if (!res->getField(cx, i, &item)) { |
| 1939 | return false; |
| 1940 | } |
| 1941 | if (!NewbornArrayPush(cx, array, item)) { |
| 1942 | return false; |
| 1943 | } |
| 1944 | } |
| 1945 | val.setObject(*array); |
| 1946 | } break; |
| 1947 | } |
| 1948 | ResolvePromise(cx, promise, val); |
| 1949 | return 0; |
| 1950 | } |
| 1951 | |
| 1952 | void UpdateSuspenderState(Instance* instance, SuspenderObject* suspender, |
| 1953 | UpdateSuspenderStateAction action) { |
| 1954 | MOZ_ASSERT(SASigUpdateSuspenderState.failureMode == FailureMode::Infallible)do { static_assert( mozilla::detail::AssertionConditionType< decltype(SASigUpdateSuspenderState.failureMode == FailureMode ::Infallible)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(SASigUpdateSuspenderState.failureMode == FailureMode::Infallible))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("SASigUpdateSuspenderState.failureMode == FailureMode::Infallible" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1954); AnnotateMozCrashReason("MOZ_ASSERT" "(" "SASigUpdateSuspenderState.failureMode == FailureMode::Infallible" ")"); do { *((volatile int*)__null) = 1954; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1955 | |
| 1956 | JSContext* cx = instance->cx(); |
| 1957 | switch (action) { |
| 1958 | case UpdateSuspenderStateAction::Enter: |
| 1959 | suspender->enter(cx); |
| 1960 | break; |
| 1961 | case UpdateSuspenderStateAction::Suspend: |
| 1962 | suspender->suspend(cx); |
| 1963 | break; |
| 1964 | case UpdateSuspenderStateAction::Resume: |
| 1965 | suspender->resume(cx); |
| 1966 | break; |
| 1967 | case UpdateSuspenderStateAction::Leave: |
| 1968 | suspender->leave(cx); |
| 1969 | break; |
| 1970 | default: |
| 1971 | MOZ_CRASH()do { do { } while (false); MOZ_ReportCrash("" , "/var/lib/jenkins/workspace/firefox-scan-build/js/src/wasm/WasmPI.cpp" , 1971); AnnotateMozCrashReason("MOZ_CRASH(" ")"); do { *((volatile int*)__null) = 1971; __attribute__((nomerge)) ::abort(); } while (false); } while (false); |
| 1972 | } |
| 1973 | } |
| 1974 | |
| 1975 | } // namespace js::wasm |
| 1976 | #endif // ENABLE_WASM_JSPI |