File: | var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp |
Warning: | line 131, column 12 Value stored to 'rv' during its initialization is never read |
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1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
2 | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
6 | |
7 | #include "mozilla/css/StreamLoader.h" |
8 | #include "mozilla/StaticPrefs_network.h" |
9 | #include "mozilla/Encoding.h" |
10 | #include "mozilla/glean/GleanMetrics.h" |
11 | #include "mozilla/TaskQueue.h" |
12 | #include "mozilla/dom/CacheExpirationTime.h" |
13 | #include "nsContentUtils.h" |
14 | #include "nsIAsyncVerifyRedirectCallback.h" |
15 | #include "nsIChannel.h" |
16 | #include "nsIInputStream.h" |
17 | #include "nsIThreadRetargetableRequest.h" |
18 | #include "nsIStreamTransportService.h" |
19 | #include "nsNetCID.h" |
20 | #include "nsNetUtil.h" |
21 | #include "nsProxyRelease.h" |
22 | #include "nsServiceManagerUtils.h" |
23 | |
24 | namespace mozilla::css { |
25 | |
26 | StreamLoader::StreamLoader(SheetLoadData& aSheetLoadData) |
27 | : mSheetLoadData(&aSheetLoadData), |
28 | mStatus(NS_OK), |
29 | mMainThreadSheetLoadData(new nsMainThreadPtrHolder<SheetLoadData>( |
30 | "StreamLoader::SheetLoadData", mSheetLoadData, false)) {} |
31 | |
32 | StreamLoader::~StreamLoader() { |
33 | #ifdef NIGHTLY_BUILD1 |
34 | MOZ_RELEASE_ASSERT(mOnStopProcessingDone || mChannelOpenFailed)do { static_assert( mozilla::detail::AssertionConditionType< decltype(mOnStopProcessingDone || mChannelOpenFailed)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(mOnStopProcessingDone || mChannelOpenFailed))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("mOnStopProcessingDone || mChannelOpenFailed" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 34); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "mOnStopProcessingDone || mChannelOpenFailed" ")"); do { *((volatile int*)__null) = 34; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
35 | #endif |
36 | } |
37 | |
38 | NS_IMPL_ISUPPORTS(StreamLoader, nsIStreamListener,MozExternalRefCountType StreamLoader::AddRef(void) { static_assert (!std::is_destructible_v<StreamLoader>, "Reference-counted class " "StreamLoader" " should not have a public destructor. " "Make this class's destructor non-public" ); do { static_assert( mozilla::detail::AssertionConditionType <decltype(int32_t(mRefCnt) >= 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) >= 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) >= 0" " (" "illegal refcnt" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0" ") (" "illegal refcnt" ")"); do { *((volatile int*)__null) = 40; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); do { static_assert( mozilla::detail::AssertionConditionType <decltype("StreamLoader" != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!("StreamLoader" != nullptr))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("\"StreamLoader\" != nullptr" " (" "Must specify a name" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 40; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); if (!mRefCnt.isThreadSafe) _mOwningThread.AssertOwnership ("StreamLoader" " not thread-safe"); nsrefcnt count = ++mRefCnt ; NS_LogAddRef((this), (count), ("StreamLoader"), (uint32_t)( sizeof(*this))); return count; } MozExternalRefCountType StreamLoader ::Release(void) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(int32_t(mRefCnt) > 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) > 0))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) > 0" " (" "dup release" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0" ") (" "dup release" ")"); do { *((volatile int*)__null) = 40 ; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); do { static_assert( mozilla::detail::AssertionConditionType <decltype("StreamLoader" != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!("StreamLoader" != nullptr))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("\"StreamLoader\" != nullptr" " (" "Must specify a name" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 40; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); if (!mRefCnt.isThreadSafe) _mOwningThread.AssertOwnership ("StreamLoader" " not thread-safe"); const char* const nametmp = "StreamLoader"; nsrefcnt count = --mRefCnt; NS_LogRelease( (this), (count), (nametmp)); if (count == 0) { mRefCnt = 1; delete (this); return 0; } return count; } nsresult StreamLoader::QueryInterface (const nsIID& aIID, void** aInstancePtr) { do { if (!(aInstancePtr )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "QueryInterface requires a non-NULL destination!" , "aInstancePtr", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); MOZ_PretendNoReturn(); } } while (0); nsresult rv = NS_ERROR_FAILURE ; static_assert(4 > 0, "Need more arguments to NS_INTERFACE_TABLE" ); static const QITableEntry table[] = { {&mozilla::detail ::kImplementedIID<StreamLoader, nsIStreamListener>, int32_t ( reinterpret_cast<char*>(static_cast<nsIStreamListener *>((StreamLoader*)0x1000)) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, {&mozilla::detail::kImplementedIID <StreamLoader, nsIThreadRetargetableStreamListener>, int32_t ( reinterpret_cast<char*>(static_cast<nsIThreadRetargetableStreamListener *>((StreamLoader*)0x1000)) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, {&mozilla::detail::kImplementedIID <StreamLoader, nsIChannelEventSink>, int32_t( reinterpret_cast <char*>(static_cast<nsIChannelEventSink*>((StreamLoader *)0x1000)) - reinterpret_cast<char*>((StreamLoader*)0x1000 ))}, {&mozilla::detail::kImplementedIID<StreamLoader, nsIInterfaceRequestor >, int32_t( reinterpret_cast<char*>(static_cast<nsIInterfaceRequestor *>((StreamLoader*)0x1000)) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, {&mozilla::detail::kImplementedIID <StreamLoader, nsISupports>, int32_t(reinterpret_cast< char*>(static_cast<nsISupports*>( static_cast<nsIStreamListener *>((StreamLoader*)0x1000))) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, { nullptr, 0 } } ; static_assert(( sizeof(table) / sizeof(table[0])) > 1, "need at least 1 interface" ); rv = NS_TableDrivenQI(static_cast<void*>(this), aIID , aInstancePtr, table); return rv; } |
39 | nsIThreadRetargetableStreamListener, nsIChannelEventSink,MozExternalRefCountType StreamLoader::AddRef(void) { static_assert (!std::is_destructible_v<StreamLoader>, "Reference-counted class " "StreamLoader" " should not have a public destructor. " "Make this class's destructor non-public" ); do { static_assert( mozilla::detail::AssertionConditionType <decltype(int32_t(mRefCnt) >= 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) >= 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) >= 0" " (" "illegal refcnt" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0" ") (" "illegal refcnt" ")"); do { *((volatile int*)__null) = 40; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); do { static_assert( mozilla::detail::AssertionConditionType <decltype("StreamLoader" != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!("StreamLoader" != nullptr))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("\"StreamLoader\" != nullptr" " (" "Must specify a name" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 40; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); if (!mRefCnt.isThreadSafe) _mOwningThread.AssertOwnership ("StreamLoader" " not thread-safe"); nsrefcnt count = ++mRefCnt ; NS_LogAddRef((this), (count), ("StreamLoader"), (uint32_t)( sizeof(*this))); return count; } MozExternalRefCountType StreamLoader ::Release(void) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(int32_t(mRefCnt) > 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) > 0))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) > 0" " (" "dup release" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0" ") (" "dup release" ")"); do { *((volatile int*)__null) = 40 ; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); do { static_assert( mozilla::detail::AssertionConditionType <decltype("StreamLoader" != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!("StreamLoader" != nullptr))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("\"StreamLoader\" != nullptr" " (" "Must specify a name" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 40; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); if (!mRefCnt.isThreadSafe) _mOwningThread.AssertOwnership ("StreamLoader" " not thread-safe"); const char* const nametmp = "StreamLoader"; nsrefcnt count = --mRefCnt; NS_LogRelease( (this), (count), (nametmp)); if (count == 0) { mRefCnt = 1; delete (this); return 0; } return count; } nsresult StreamLoader::QueryInterface (const nsIID& aIID, void** aInstancePtr) { do { if (!(aInstancePtr )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "QueryInterface requires a non-NULL destination!" , "aInstancePtr", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); MOZ_PretendNoReturn(); } } while (0); nsresult rv = NS_ERROR_FAILURE ; static_assert(4 > 0, "Need more arguments to NS_INTERFACE_TABLE" ); static const QITableEntry table[] = { {&mozilla::detail ::kImplementedIID<StreamLoader, nsIStreamListener>, int32_t ( reinterpret_cast<char*>(static_cast<nsIStreamListener *>((StreamLoader*)0x1000)) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, {&mozilla::detail::kImplementedIID <StreamLoader, nsIThreadRetargetableStreamListener>, int32_t ( reinterpret_cast<char*>(static_cast<nsIThreadRetargetableStreamListener *>((StreamLoader*)0x1000)) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, {&mozilla::detail::kImplementedIID <StreamLoader, nsIChannelEventSink>, int32_t( reinterpret_cast <char*>(static_cast<nsIChannelEventSink*>((StreamLoader *)0x1000)) - reinterpret_cast<char*>((StreamLoader*)0x1000 ))}, {&mozilla::detail::kImplementedIID<StreamLoader, nsIInterfaceRequestor >, int32_t( reinterpret_cast<char*>(static_cast<nsIInterfaceRequestor *>((StreamLoader*)0x1000)) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, {&mozilla::detail::kImplementedIID <StreamLoader, nsISupports>, int32_t(reinterpret_cast< char*>(static_cast<nsISupports*>( static_cast<nsIStreamListener *>((StreamLoader*)0x1000))) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, { nullptr, 0 } } ; static_assert(( sizeof(table) / sizeof(table[0])) > 1, "need at least 1 interface" ); rv = NS_TableDrivenQI(static_cast<void*>(this), aIID , aInstancePtr, table); return rv; } |
40 | nsIInterfaceRequestor)MozExternalRefCountType StreamLoader::AddRef(void) { static_assert (!std::is_destructible_v<StreamLoader>, "Reference-counted class " "StreamLoader" " should not have a public destructor. " "Make this class's destructor non-public" ); do { static_assert( mozilla::detail::AssertionConditionType <decltype(int32_t(mRefCnt) >= 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) >= 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) >= 0" " (" "illegal refcnt" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0" ") (" "illegal refcnt" ")"); do { *((volatile int*)__null) = 40; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); do { static_assert( mozilla::detail::AssertionConditionType <decltype("StreamLoader" != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!("StreamLoader" != nullptr))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("\"StreamLoader\" != nullptr" " (" "Must specify a name" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 40; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); if (!mRefCnt.isThreadSafe) _mOwningThread.AssertOwnership ("StreamLoader" " not thread-safe"); nsrefcnt count = ++mRefCnt ; NS_LogAddRef((this), (count), ("StreamLoader"), (uint32_t)( sizeof(*this))); return count; } MozExternalRefCountType StreamLoader ::Release(void) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(int32_t(mRefCnt) > 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) > 0))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) > 0" " (" "dup release" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0" ") (" "dup release" ")"); do { *((volatile int*)__null) = 40 ; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); do { static_assert( mozilla::detail::AssertionConditionType <decltype("StreamLoader" != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!("StreamLoader" != nullptr))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("\"StreamLoader\" != nullptr" " (" "Must specify a name" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 40; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); if (!mRefCnt.isThreadSafe) _mOwningThread.AssertOwnership ("StreamLoader" " not thread-safe"); const char* const nametmp = "StreamLoader"; nsrefcnt count = --mRefCnt; NS_LogRelease( (this), (count), (nametmp)); if (count == 0) { mRefCnt = 1; delete (this); return 0; } return count; } nsresult StreamLoader::QueryInterface (const nsIID& aIID, void** aInstancePtr) { do { if (!(aInstancePtr )) { NS_DebugBreak(NS_DEBUG_ASSERTION, "QueryInterface requires a non-NULL destination!" , "aInstancePtr", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 40); MOZ_PretendNoReturn(); } } while (0); nsresult rv = NS_ERROR_FAILURE ; static_assert(4 > 0, "Need more arguments to NS_INTERFACE_TABLE" ); static const QITableEntry table[] = { {&mozilla::detail ::kImplementedIID<StreamLoader, nsIStreamListener>, int32_t ( reinterpret_cast<char*>(static_cast<nsIStreamListener *>((StreamLoader*)0x1000)) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, {&mozilla::detail::kImplementedIID <StreamLoader, nsIThreadRetargetableStreamListener>, int32_t ( reinterpret_cast<char*>(static_cast<nsIThreadRetargetableStreamListener *>((StreamLoader*)0x1000)) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, {&mozilla::detail::kImplementedIID <StreamLoader, nsIChannelEventSink>, int32_t( reinterpret_cast <char*>(static_cast<nsIChannelEventSink*>((StreamLoader *)0x1000)) - reinterpret_cast<char*>((StreamLoader*)0x1000 ))}, {&mozilla::detail::kImplementedIID<StreamLoader, nsIInterfaceRequestor >, int32_t( reinterpret_cast<char*>(static_cast<nsIInterfaceRequestor *>((StreamLoader*)0x1000)) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, {&mozilla::detail::kImplementedIID <StreamLoader, nsISupports>, int32_t(reinterpret_cast< char*>(static_cast<nsISupports*>( static_cast<nsIStreamListener *>((StreamLoader*)0x1000))) - reinterpret_cast<char*> ((StreamLoader*)0x1000))}, { nullptr, 0 } } ; static_assert(( sizeof(table) / sizeof(table[0])) > 1, "need at least 1 interface" ); rv = NS_TableDrivenQI(static_cast<void*>(this), aIID , aInstancePtr, table); return rv; } |
41 | |
42 | /* nsIRequestObserver implementation */ |
43 | NS_IMETHODIMPnsresult |
44 | StreamLoader::OnStartRequest(nsIRequest* aRequest) { |
45 | MOZ_ASSERT(aRequest)do { static_assert( mozilla::detail::AssertionConditionType< decltype(aRequest)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(aRequest))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("aRequest", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 45); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aRequest" ")" ); do { *((volatile int*)__null) = 45; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
46 | mRequest = aRequest; |
47 | mSheetLoadData->NotifyStart(aRequest); |
48 | |
49 | // It's kinda bad to let Web content send a number that results |
50 | // in a potentially large allocation directly, but efficiency of |
51 | // compression bombs is so great that it doesn't make much sense |
52 | // to require a site to send one before going ahead and allocating. |
53 | if (nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest)) { |
54 | int64_t length; |
55 | nsresult rv = channel->GetContentLength(&length); |
56 | if (NS_SUCCEEDED(rv)((bool)(__builtin_expect(!!(!NS_FAILED_impl(rv)), 1))) && length > 0) { |
57 | CheckedInt<nsACString::size_type> checkedLength(length); |
58 | if (!checkedLength.isValid()) { |
59 | return (mStatus = NS_ERROR_OUT_OF_MEMORY); |
60 | } |
61 | if (!mBytes.SetCapacity(checkedLength.value(), fallible)) { |
62 | return (mStatus = NS_ERROR_OUT_OF_MEMORY); |
63 | } |
64 | } |
65 | NS_GetFinalChannelURI(channel, getter_AddRefs(mFinalChannelURI)); |
66 | nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager(); |
67 | // we dont return on error here as the error is handled in |
68 | // SheetLoadData::VerifySheetReadyToParse |
69 | Unused << secMan->GetChannelResultPrincipal( |
70 | channel, getter_AddRefs(mChannelResultPrincipal)); |
71 | } |
72 | if (nsCOMPtr<nsIThreadRetargetableRequest> rr = do_QueryInterface(aRequest)) { |
73 | nsCOMPtr<nsIEventTarget> sts = |
74 | do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID"@mozilla.org/network/stream-transport-service;1"); |
75 | RefPtr queue = |
76 | TaskQueue::Create(sts.forget(), "css::StreamLoader Delivery Queue"); |
77 | rr->RetargetDeliveryTo(queue); |
78 | } |
79 | |
80 | mSheetLoadData->SetMinimumExpirationTime( |
81 | nsContentUtils::GetSubresourceCacheExpirationTime(aRequest, |
82 | mSheetLoadData->mURI)); |
83 | |
84 | // We need to block block resolution of parse promise until we receive |
85 | // OnStopRequest on Main thread. This is necessary because parse promise |
86 | // resolution fires OnLoad event OnLoad event must not be dispatched until |
87 | // OnStopRequest in main thread is processed, for stuff like performance |
88 | // resource entries. |
89 | mSheetLoadData->mSheet->BlockParsePromise(); |
90 | |
91 | return NS_OK; |
92 | } |
93 | |
94 | NS_IMETHODIMPnsresult |
95 | StreamLoader::CheckListenerChain() { return NS_OK; } |
96 | |
97 | NS_IMETHODIMPnsresult |
98 | StreamLoader::OnStopRequest(nsIRequest* aRequest, nsresult aStatus) { |
99 | MOZ_ASSERT_IF(!StaticPrefs::network_send_OnDataFinished_cssLoader(),do { if (!StaticPrefs::network_send_OnDataFinished_cssLoader( )) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(!mOnStopProcessingDone)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!mOnStopProcessingDone))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("!mOnStopProcessingDone" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 100); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mOnStopProcessingDone" ")"); do { *((volatile int*)__null) = 100; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false) |
100 | !mOnStopProcessingDone)do { if (!StaticPrefs::network_send_OnDataFinished_cssLoader( )) { do { static_assert( mozilla::detail::AssertionConditionType <decltype(!mOnStopProcessingDone)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(!mOnStopProcessingDone))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("!mOnStopProcessingDone" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 100); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mOnStopProcessingDone" ")"); do { *((volatile int*)__null) = 100; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
101 | |
102 | // StreamLoader::OnStopRequest can get triggered twice for a request. |
103 | // Once from the path |
104 | // nsIThreadRetargetableStreamListener::OnDataFinished->StreamLoader::OnDataFinished |
105 | // (non-main thread) and |
106 | // once from nsIRequestObserver::OnStopRequest path (main thread). It is |
107 | // guaranteed that we will always get |
108 | // nsIThreadRetargetableStreamListener::OnDataFinished trigger first and this |
109 | // is always followed by nsIRequestObserver::OnStopRequest |
110 | |
111 | // If we are executing OnStopRequest OMT, we need to block resolution of parse |
112 | // promise and unblock again if we are executing this in main thread. |
113 | // Resolution of parse promise fires onLoadEvent and this should not happen |
114 | // before main thread OnStopRequest is dispatched. |
115 | if (NS_IsMainThread()) { |
116 | if (mOnDataFinishedTime) { |
117 | // collect telemetry for the delta between OnDataFinished and |
118 | // OnStopRequest |
119 | TimeDuration delta = (TimeStamp::Now() - mOnDataFinishedTime); |
120 | glean::networking::http_content_cssloader_ondatafinished_to_onstop_delay |
121 | .AccumulateRawDuration(delta); |
122 | } |
123 | mSheetLoadData->mSheet->UnblockParsePromise(); |
124 | } |
125 | |
126 | if (mOnStopProcessingDone) { |
127 | return NS_OK; |
128 | } |
129 | mOnStopProcessingDone = true; |
130 | |
131 | nsresult rv = mStatus; |
Value stored to 'rv' during its initialization is never read | |
132 | // Decoded data |
133 | nsCString utf8String; |
134 | { |
135 | nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest); |
136 | |
137 | if (NS_IsMainThread()) { |
138 | channel->SetNotificationCallbacks(nullptr); |
139 | } |
140 | |
141 | if (NS_FAILED(mStatus)((bool)(__builtin_expect(!!(NS_FAILED_impl(mStatus)), 0)))) { |
142 | mSheetLoadData->VerifySheetReadyToParse(mStatus, ""_ns, ""_ns, channel, |
143 | mFinalChannelURI, |
144 | mChannelResultPrincipal); |
145 | |
146 | if (!NS_IsMainThread()) { |
147 | // When processing OMT, we have code paths in VerifySheetReadyToParse |
148 | // that are main-thread only. We bail on such scenarios and continue |
149 | // processing them on main thread OnStopRequest. |
150 | mOnStopProcessingDone = false; |
151 | } |
152 | return mStatus; |
153 | } |
154 | |
155 | rv = mSheetLoadData->VerifySheetReadyToParse(aStatus, mBOMBytes, mBytes, |
156 | channel, mFinalChannelURI, |
157 | mChannelResultPrincipal); |
158 | if (rv != NS_OK_PARSE_SHEET) { |
159 | if (!NS_IsMainThread()) { |
160 | mOnStopProcessingDone = false; |
161 | } |
162 | return rv; |
163 | } |
164 | |
165 | // At this point all the conditions that requires us to run on main |
166 | // are checked in VerifySheetReadyToParse |
167 | |
168 | // BOM detection generally happens during the write callback, but that |
169 | // won't have happened if fewer than three bytes were received. |
170 | if (mEncodingFromBOM.isNothing()) { |
171 | HandleBOM(); |
172 | MOZ_ASSERT(mEncodingFromBOM.isSome())do { static_assert( mozilla::detail::AssertionConditionType< decltype(mEncodingFromBOM.isSome())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(mEncodingFromBOM.isSome()))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("mEncodingFromBOM.isSome()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 172); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mEncodingFromBOM.isSome()" ")"); do { *((volatile int*)__null) = 172; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
173 | } |
174 | // Hold the nsStringBuffer for the bytes from the stack to ensure release |
175 | // after its scope ends |
176 | nsCString bytes = std::move(mBytes); |
177 | // The BOM handling has happened, but we still may not have an encoding if |
178 | // there was no BOM. Ensure we have one. |
179 | const Encoding* encoding = mEncodingFromBOM.value(); |
180 | if (!encoding) { |
181 | // No BOM |
182 | encoding = mSheetLoadData->DetermineNonBOMEncoding(bytes, channel); |
183 | } |
184 | mSheetLoadData->mEncoding = encoding; |
185 | |
186 | size_t validated = 0; |
187 | if (encoding == UTF_8_ENCODING) { |
188 | validated = Encoding::UTF8ValidUpTo(bytes); |
189 | } |
190 | |
191 | if (validated == bytes.Length()) { |
192 | // Either this is UTF-8 and all valid, or it's not UTF-8 but is an empty |
193 | // string. This assumes that an empty string in any encoding decodes to |
194 | // empty string, which seems like a plausible assumption. |
195 | utf8String = std::move(bytes); |
196 | } else { |
197 | rv = encoding->DecodeWithoutBOMHandling(bytes, utf8String, validated); |
198 | NS_ENSURE_SUCCESS(rv, rv)do { nsresult __rv = rv; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "rv", "rv", static_cast<uint32_t >(__rv), name ? " (" : "", name ? name : "", name ? ")" : "" ); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 198); return rv; } } while (false); |
199 | } |
200 | } // run destructor for `bytes` |
201 | |
202 | // For reasons I don't understand, factoring the below lines into |
203 | // a method on SheetLoadData resulted in a linker error. Hence, |
204 | // accessing fields of mSheetLoadData from here. |
205 | mSheetLoadData->mLoader->ParseSheet(utf8String, mMainThreadSheetLoadData, |
206 | Loader::AllowAsyncParse::Yes); |
207 | |
208 | mRequest = nullptr; |
209 | |
210 | return NS_OK; |
211 | } |
212 | |
213 | /* nsIStreamListener implementation */ |
214 | NS_IMETHODIMPnsresult |
215 | StreamLoader::OnDataAvailable(nsIRequest*, nsIInputStream* aInputStream, |
216 | uint64_t, uint32_t aCount) { |
217 | if (NS_FAILED(mStatus)((bool)(__builtin_expect(!!(NS_FAILED_impl(mStatus)), 0)))) { |
218 | return mStatus; |
219 | } |
220 | uint32_t dummy; |
221 | return aInputStream->ReadSegments(WriteSegmentFun, this, aCount, &dummy); |
222 | } |
223 | |
224 | void StreamLoader::HandleBOM() { |
225 | MOZ_ASSERT(mEncodingFromBOM.isNothing())do { static_assert( mozilla::detail::AssertionConditionType< decltype(mEncodingFromBOM.isNothing())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(mEncodingFromBOM.isNothing() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "mEncodingFromBOM.isNothing()", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 225); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mEncodingFromBOM.isNothing()" ")"); do { *((volatile int*)__null) = 225; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
226 | MOZ_ASSERT(mBytes.IsEmpty())do { static_assert( mozilla::detail::AssertionConditionType< decltype(mBytes.IsEmpty())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(mBytes.IsEmpty()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("mBytes.IsEmpty()" , "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 226); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mBytes.IsEmpty()" ")"); do { *((volatile int*)__null) = 226; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
227 | |
228 | auto [encoding, bomLength] = Encoding::ForBOM(mBOMBytes); |
229 | mEncodingFromBOM.emplace(encoding); // Null means no BOM. |
230 | |
231 | // BOMs are three bytes at most, but may be fewer. Copy over anything |
232 | // that wasn't part of the BOM to mBytes. Note that we need to track |
233 | // any BOM bytes as well for SRI handling. |
234 | mBytes.Append(Substring(mBOMBytes, bomLength)); |
235 | mBOMBytes.Truncate(bomLength); |
236 | } |
237 | |
238 | NS_IMETHODIMPnsresult |
239 | StreamLoader::OnDataFinished(nsresult aResult) { |
240 | if (StaticPrefs::network_send_OnDataFinished_cssLoader()) { |
241 | MOZ_ASSERT(mOnDataFinishedTime.IsNull(),do { static_assert( mozilla::detail::AssertionConditionType< decltype(mOnDataFinishedTime.IsNull())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(mOnDataFinishedTime.IsNull() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "mOnDataFinishedTime.IsNull()" " (" "OnDataFinished should only be called once" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 242); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mOnDataFinishedTime.IsNull()" ") (" "OnDataFinished should only be called once" ")"); do { *((volatile int*)__null) = 242; __attribute__((nomerge)) ::abort (); } while (false); } } while (false) |
242 | "OnDataFinished should only be called once")do { static_assert( mozilla::detail::AssertionConditionType< decltype(mOnDataFinishedTime.IsNull())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(mOnDataFinishedTime.IsNull() ))), 0))) { do { } while (false); MOZ_ReportAssertionFailure( "mOnDataFinishedTime.IsNull()" " (" "OnDataFinished should only be called once" ")", "/var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp" , 242); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mOnDataFinishedTime.IsNull()" ") (" "OnDataFinished should only be called once" ")"); do { *((volatile int*)__null) = 242; __attribute__((nomerge)) ::abort (); } while (false); } } while (false); |
243 | mOnDataFinishedTime = TimeStamp::Now(); |
244 | return OnStopRequest(mRequest, aResult); |
245 | } |
246 | |
247 | return NS_OK; |
248 | } |
249 | |
250 | NS_IMETHODIMPnsresult |
251 | StreamLoader::GetInterface(const nsIID& aIID, void** aResult) { |
252 | if (aIID.Equals(NS_GET_IID(nsIChannelEventSink)(nsIChannelEventSink::COMTypeInfo<nsIChannelEventSink, void >::kIID))) { |
253 | return QueryInterface(aIID, aResult); |
254 | } |
255 | |
256 | return NS_NOINTERFACE; |
257 | } |
258 | |
259 | nsresult StreamLoader::AsyncOnChannelRedirect( |
260 | nsIChannel* aOld, nsIChannel* aNew, uint32_t aFlags, |
261 | nsIAsyncVerifyRedirectCallback* aCallback) { |
262 | mSheetLoadData->SetMinimumExpirationTime( |
263 | nsContentUtils::GetSubresourceCacheExpirationTime(aOld, |
264 | mSheetLoadData->mURI)); |
265 | |
266 | aCallback->OnRedirectVerifyCallback(NS_OK); |
267 | |
268 | return NS_OK; |
269 | } |
270 | |
271 | nsresult StreamLoader::WriteSegmentFun(nsIInputStream*, void* aClosure, |
272 | const char* aSegment, uint32_t, |
273 | uint32_t aCount, uint32_t* aWriteCount) { |
274 | *aWriteCount = 0; |
275 | StreamLoader* self = static_cast<StreamLoader*>(aClosure); |
276 | if (NS_FAILED(self->mStatus)((bool)(__builtin_expect(!!(NS_FAILED_impl(self->mStatus)) , 0)))) { |
277 | return self->mStatus; |
278 | } |
279 | |
280 | // If we haven't done BOM detection yet, divert bytes into the special buffer. |
281 | if (self->mEncodingFromBOM.isNothing()) { |
282 | size_t bytesToCopy = std::min<size_t>(3 - self->mBOMBytes.Length(), aCount); |
283 | self->mBOMBytes.Append(aSegment, bytesToCopy); |
284 | aSegment += bytesToCopy; |
285 | *aWriteCount += bytesToCopy; |
286 | aCount -= bytesToCopy; |
287 | |
288 | if (self->mBOMBytes.Length() == 3) { |
289 | self->HandleBOM(); |
290 | } else { |
291 | return NS_OK; |
292 | } |
293 | } |
294 | |
295 | if (!self->mBytes.Append(aSegment, aCount, fallible)) { |
296 | self->mBytes.Truncate(); |
297 | return (self->mStatus = NS_ERROR_OUT_OF_MEMORY); |
298 | } |
299 | |
300 | *aWriteCount += aCount; |
301 | return NS_OK; |
302 | } |
303 | |
304 | } // namespace mozilla::css |