File: | var/lib/jenkins/workspace/firefox-scan-build/layout/style/StreamLoader.cpp |
Warning: | line 140, 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 "nsContentUtils.h" |
13 | #include "nsIAsyncVerifyRedirectCallback.h" |
14 | #include "nsIChannel.h" |
15 | #include "nsIInputStream.h" |
16 | #include "nsIThreadRetargetableRequest.h" |
17 | #include "nsIStreamTransportService.h" |
18 | #include "nsNetCID.h" |
19 | #include "nsNetUtil.h" |
20 | #include "nsProxyRelease.h" |
21 | #include "nsServiceManagerUtils.h" |
22 | |
23 | namespace mozilla::css { |
24 | |
25 | StreamLoader::StreamLoader(SheetLoadData& aSheetLoadData) |
26 | : mSheetLoadData(&aSheetLoadData), |
27 | mStatus(NS_OK), |
28 | mMainThreadSheetLoadData(new nsMainThreadPtrHolder<SheetLoadData>( |
29 | "StreamLoader::SheetLoadData", mSheetLoadData, false)) {} |
30 | |
31 | StreamLoader::~StreamLoader() { |
32 | #ifdef NIGHTLY_BUILD1 |
33 | 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" , 33); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "mOnStopProcessingDone || mChannelOpenFailed" ")"); do { *((volatile int*)__null) = 33; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
34 | #endif |
35 | } |
36 | |
37 | 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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0" ") (" "illegal refcnt" ")"); do { *((volatile int*)__null) = 39; __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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 39; __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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0" ") (" "dup release" ")"); do { *((volatile int*)__null) = 39 ; __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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 39; __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" , 39); 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; } |
38 | 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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0" ") (" "illegal refcnt" ")"); do { *((volatile int*)__null) = 39; __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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 39; __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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0" ") (" "dup release" ")"); do { *((volatile int*)__null) = 39 ; __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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 39; __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" , 39); 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 | 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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0" ") (" "illegal refcnt" ")"); do { *((volatile int*)__null) = 39; __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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 39; __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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0" ") (" "dup release" ")"); do { *((volatile int*)__null) = 39 ; __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" , 39); AnnotateMozCrashReason("MOZ_ASSERT" "(" "\"StreamLoader\" != nullptr" ") (" "Must specify a name" ")"); do { *((volatile int*)__null ) = 39; __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" , 39); 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 | |
41 | static uint32_t CalculateExpirationTime(nsIRequest* aRequest, nsIURI* aURI) { |
42 | auto info = nsContentUtils::GetSubresourceCacheValidationInfo(aRequest, aURI); |
43 | |
44 | // For now, we never cache entries that we have to revalidate, or whose |
45 | // channel don't support caching. |
46 | if (info.mMustRevalidate || !info.mExpirationTime) { |
47 | return nsContentUtils::SecondsFromPRTime(PR_Now()) - 1; |
48 | } |
49 | return *info.mExpirationTime; |
50 | } |
51 | |
52 | /* nsIRequestObserver implementation */ |
53 | NS_IMETHODIMPnsresult |
54 | StreamLoader::OnStartRequest(nsIRequest* aRequest) { |
55 | 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" , 55); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aRequest" ")" ); do { *((volatile int*)__null) = 55; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
56 | mRequest = aRequest; |
57 | mSheetLoadData->NotifyStart(aRequest); |
58 | |
59 | // It's kinda bad to let Web content send a number that results |
60 | // in a potentially large allocation directly, but efficiency of |
61 | // compression bombs is so great that it doesn't make much sense |
62 | // to require a site to send one before going ahead and allocating. |
63 | if (nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest)) { |
64 | int64_t length; |
65 | nsresult rv = channel->GetContentLength(&length); |
66 | if (NS_SUCCEEDED(rv)((bool)(__builtin_expect(!!(!NS_FAILED_impl(rv)), 1))) && length > 0) { |
67 | CheckedInt<nsACString::size_type> checkedLength(length); |
68 | if (!checkedLength.isValid()) { |
69 | return (mStatus = NS_ERROR_OUT_OF_MEMORY); |
70 | } |
71 | if (!mBytes.SetCapacity(checkedLength.value(), fallible)) { |
72 | return (mStatus = NS_ERROR_OUT_OF_MEMORY); |
73 | } |
74 | } |
75 | NS_GetFinalChannelURI(channel, getter_AddRefs(mFinalChannelURI)); |
76 | nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager(); |
77 | // we dont return on error here as the error is handled in |
78 | // SheetLoadData::VerifySheetReadyToParse |
79 | Unused << secMan->GetChannelResultPrincipal( |
80 | channel, getter_AddRefs(mChannelResultPrincipal)); |
81 | } |
82 | if (nsCOMPtr<nsIThreadRetargetableRequest> rr = do_QueryInterface(aRequest)) { |
83 | nsCOMPtr<nsIEventTarget> sts = |
84 | do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID"@mozilla.org/network/stream-transport-service;1"); |
85 | RefPtr queue = |
86 | TaskQueue::Create(sts.forget(), "css::StreamLoader Delivery Queue"); |
87 | rr->RetargetDeliveryTo(queue); |
88 | } |
89 | |
90 | mSheetLoadData->AccumulateExpirationTime( |
91 | CalculateExpirationTime(aRequest, mSheetLoadData->mURI)); |
92 | |
93 | // We need to block block resolution of parse promise until we receive |
94 | // OnStopRequest on Main thread. This is necessary because parse promise |
95 | // resolution fires OnLoad event OnLoad event must not be dispatched until |
96 | // OnStopRequest in main thread is processed, for stuff like performance |
97 | // resource entries. |
98 | mSheetLoadData->mSheet->BlockParsePromise(); |
99 | |
100 | return NS_OK; |
101 | } |
102 | |
103 | NS_IMETHODIMPnsresult |
104 | StreamLoader::CheckListenerChain() { return NS_OK; } |
105 | |
106 | NS_IMETHODIMPnsresult |
107 | StreamLoader::OnStopRequest(nsIRequest* aRequest, nsresult aStatus) { |
108 | 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" , 109); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mOnStopProcessingDone" ")"); do { *((volatile int*)__null) = 109; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false) |
109 | !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" , 109); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mOnStopProcessingDone" ")"); do { *((volatile int*)__null) = 109; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); } } while ( false); |
110 | |
111 | // StreamLoader::OnStopRequest can get triggered twice for a request. |
112 | // Once from the path |
113 | // nsIThreadRetargetableStreamListener::OnDataFinished->StreamLoader::OnDataFinished |
114 | // (non-main thread) and |
115 | // once from nsIRequestObserver::OnStopRequest path (main thread). It is |
116 | // guaranteed that we will always get |
117 | // nsIThreadRetargetableStreamListener::OnDataFinished trigger first and this |
118 | // is always followed by nsIRequestObserver::OnStopRequest |
119 | |
120 | // If we are executing OnStopRequest OMT, we need to block resolution of parse |
121 | // promise and unblock again if we are executing this in main thread. |
122 | // Resolution of parse promise fires onLoadEvent and this should not happen |
123 | // before main thread OnStopRequest is dispatched. |
124 | if (NS_IsMainThread()) { |
125 | if (mOnDataFinishedTime) { |
126 | // collect telemetry for the delta between OnDataFinished and |
127 | // OnStopRequest |
128 | TimeDuration delta = (TimeStamp::Now() - mOnDataFinishedTime); |
129 | glean::networking::http_content_cssloader_ondatafinished_to_onstop_delay |
130 | .AccumulateRawDuration(delta); |
131 | } |
132 | mSheetLoadData->mSheet->UnblockParsePromise(); |
133 | } |
134 | |
135 | if (mOnStopProcessingDone) { |
136 | return NS_OK; |
137 | } |
138 | mOnStopProcessingDone = true; |
139 | |
140 | nsresult rv = mStatus; |
Value stored to 'rv' during its initialization is never read | |
141 | // Decoded data |
142 | nsCString utf8String; |
143 | { |
144 | nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest); |
145 | |
146 | if (NS_IsMainThread()) { |
147 | channel->SetNotificationCallbacks(nullptr); |
148 | } |
149 | |
150 | if (NS_FAILED(mStatus)((bool)(__builtin_expect(!!(NS_FAILED_impl(mStatus)), 0)))) { |
151 | mSheetLoadData->VerifySheetReadyToParse(mStatus, ""_ns, ""_ns, channel, |
152 | mFinalChannelURI, |
153 | mChannelResultPrincipal); |
154 | |
155 | if (!NS_IsMainThread()) { |
156 | // When processing OMT, we have code paths in VerifySheetReadyToParse |
157 | // that are main-thread only. We bail on such scenarios and continue |
158 | // processing them on main thread OnStopRequest. |
159 | mOnStopProcessingDone = false; |
160 | } |
161 | return mStatus; |
162 | } |
163 | |
164 | rv = mSheetLoadData->VerifySheetReadyToParse(aStatus, mBOMBytes, mBytes, |
165 | channel, mFinalChannelURI, |
166 | mChannelResultPrincipal); |
167 | if (rv != NS_OK_PARSE_SHEET) { |
168 | if (!NS_IsMainThread()) { |
169 | mOnStopProcessingDone = false; |
170 | } |
171 | return rv; |
172 | } |
173 | |
174 | // At this point all the conditions that requires us to run on main |
175 | // are checked in VerifySheetReadyToParse |
176 | |
177 | // BOM detection generally happens during the write callback, but that |
178 | // won't have happened if fewer than three bytes were received. |
179 | if (mEncodingFromBOM.isNothing()) { |
180 | HandleBOM(); |
181 | 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" , 181); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mEncodingFromBOM.isSome()" ")"); do { *((volatile int*)__null) = 181; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
182 | } |
183 | // Hold the nsStringBuffer for the bytes from the stack to ensure release |
184 | // after its scope ends |
185 | nsCString bytes = std::move(mBytes); |
186 | // The BOM handling has happened, but we still may not have an encoding if |
187 | // there was no BOM. Ensure we have one. |
188 | const Encoding* encoding = mEncodingFromBOM.value(); |
189 | if (!encoding) { |
190 | // No BOM |
191 | encoding = mSheetLoadData->DetermineNonBOMEncoding(bytes, channel); |
192 | } |
193 | mSheetLoadData->mEncoding = encoding; |
194 | |
195 | size_t validated = 0; |
196 | if (encoding == UTF_8_ENCODING) { |
197 | validated = Encoding::UTF8ValidUpTo(bytes); |
198 | } |
199 | |
200 | if (validated == bytes.Length()) { |
201 | // Either this is UTF-8 and all valid, or it's not UTF-8 but is an empty |
202 | // string. This assumes that an empty string in any encoding decodes to |
203 | // empty string, which seems like a plausible assumption. |
204 | utf8String = std::move(bytes); |
205 | } else { |
206 | rv = encoding->DecodeWithoutBOMHandling(bytes, utf8String, validated); |
207 | 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" , 207); return rv; } } while (false); |
208 | } |
209 | } // run destructor for `bytes` |
210 | |
211 | // For reasons I don't understand, factoring the below lines into |
212 | // a method on SheetLoadData resulted in a linker error. Hence, |
213 | // accessing fields of mSheetLoadData from here. |
214 | mSheetLoadData->mLoader->ParseSheet(utf8String, mMainThreadSheetLoadData, |
215 | Loader::AllowAsyncParse::Yes); |
216 | |
217 | mRequest = nullptr; |
218 | |
219 | return NS_OK; |
220 | } |
221 | |
222 | /* nsIStreamListener implementation */ |
223 | NS_IMETHODIMPnsresult |
224 | StreamLoader::OnDataAvailable(nsIRequest*, nsIInputStream* aInputStream, |
225 | uint64_t, uint32_t aCount) { |
226 | if (NS_FAILED(mStatus)((bool)(__builtin_expect(!!(NS_FAILED_impl(mStatus)), 0)))) { |
227 | return mStatus; |
228 | } |
229 | uint32_t dummy; |
230 | return aInputStream->ReadSegments(WriteSegmentFun, this, aCount, &dummy); |
231 | } |
232 | |
233 | void StreamLoader::HandleBOM() { |
234 | 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" , 234); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mEncodingFromBOM.isNothing()" ")"); do { *((volatile int*)__null) = 234; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
235 | 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" , 235); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mBytes.IsEmpty()" ")"); do { *((volatile int*)__null) = 235; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
236 | |
237 | auto [encoding, bomLength] = Encoding::ForBOM(mBOMBytes); |
238 | mEncodingFromBOM.emplace(encoding); // Null means no BOM. |
239 | |
240 | // BOMs are three bytes at most, but may be fewer. Copy over anything |
241 | // that wasn't part of the BOM to mBytes. Note that we need to track |
242 | // any BOM bytes as well for SRI handling. |
243 | mBytes.Append(Substring(mBOMBytes, bomLength)); |
244 | mBOMBytes.Truncate(bomLength); |
245 | } |
246 | |
247 | NS_IMETHODIMPnsresult |
248 | StreamLoader::OnDataFinished(nsresult aResult) { |
249 | if (StaticPrefs::network_send_OnDataFinished_cssLoader()) { |
250 | 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" , 251); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mOnDataFinishedTime.IsNull()" ") (" "OnDataFinished should only be called once" ")"); do { *((volatile int*)__null) = 251; __attribute__((nomerge)) ::abort (); } while (false); } } while (false) |
251 | "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" , 251); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mOnDataFinishedTime.IsNull()" ") (" "OnDataFinished should only be called once" ")"); do { *((volatile int*)__null) = 251; __attribute__((nomerge)) ::abort (); } while (false); } } while (false); |
252 | mOnDataFinishedTime = TimeStamp::Now(); |
253 | return OnStopRequest(mRequest, aResult); |
254 | } |
255 | |
256 | return NS_OK; |
257 | } |
258 | |
259 | NS_IMETHODIMPnsresult |
260 | StreamLoader::GetInterface(const nsIID& aIID, void** aResult) { |
261 | if (aIID.Equals(NS_GET_IID(nsIChannelEventSink)(nsIChannelEventSink::COMTypeInfo<nsIChannelEventSink, void >::kIID))) { |
262 | return QueryInterface(aIID, aResult); |
263 | } |
264 | |
265 | return NS_NOINTERFACE; |
266 | } |
267 | |
268 | nsresult StreamLoader::AsyncOnChannelRedirect( |
269 | nsIChannel* aOld, nsIChannel* aNew, uint32_t aFlags, |
270 | nsIAsyncVerifyRedirectCallback* aCallback) { |
271 | mSheetLoadData->AccumulateExpirationTime( |
272 | CalculateExpirationTime(aOld, mSheetLoadData->mURI)); |
273 | |
274 | aCallback->OnRedirectVerifyCallback(NS_OK); |
275 | |
276 | return NS_OK; |
277 | } |
278 | |
279 | nsresult StreamLoader::WriteSegmentFun(nsIInputStream*, void* aClosure, |
280 | const char* aSegment, uint32_t, |
281 | uint32_t aCount, uint32_t* aWriteCount) { |
282 | *aWriteCount = 0; |
283 | StreamLoader* self = static_cast<StreamLoader*>(aClosure); |
284 | if (NS_FAILED(self->mStatus)((bool)(__builtin_expect(!!(NS_FAILED_impl(self->mStatus)) , 0)))) { |
285 | return self->mStatus; |
286 | } |
287 | |
288 | // If we haven't done BOM detection yet, divert bytes into the special buffer. |
289 | if (self->mEncodingFromBOM.isNothing()) { |
290 | size_t bytesToCopy = std::min<size_t>(3 - self->mBOMBytes.Length(), aCount); |
291 | self->mBOMBytes.Append(aSegment, bytesToCopy); |
292 | aSegment += bytesToCopy; |
293 | *aWriteCount += bytesToCopy; |
294 | aCount -= bytesToCopy; |
295 | |
296 | if (self->mBOMBytes.Length() == 3) { |
297 | self->HandleBOM(); |
298 | } else { |
299 | return NS_OK; |
300 | } |
301 | } |
302 | |
303 | if (!self->mBytes.Append(aSegment, aCount, fallible)) { |
304 | self->mBytes.Truncate(); |
305 | return (self->mStatus = NS_ERROR_OUT_OF_MEMORY); |
306 | } |
307 | |
308 | *aWriteCount += aCount; |
309 | return NS_OK; |
310 | } |
311 | |
312 | } // namespace mozilla::css |