forked from mirrors/gecko-dev
4032 lines
140 KiB
C++
4032 lines
140 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ScriptLoader.h"
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#include "ScriptLoadHandler.h"
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#include "ScriptTrace.h"
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#include "ModuleLoader.h"
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#include "nsGenericHTMLElement.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/dom/FetchPriority.h"
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#include "mozilla/dom/RequestBinding.h"
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#include "nsIChildChannel.h"
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#include "zlib.h"
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#include "prsystem.h"
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#include "jsapi.h"
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#include "jsfriendapi.h"
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#include "js/Array.h" // JS::GetArrayLength
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#include "js/ColumnNumber.h" // JS::ColumnNumberOneOrigin
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#include "js/CompilationAndEvaluation.h"
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#include "js/CompileOptions.h" // JS::CompileOptions, JS::OwningCompileOptions, JS::DecodeOptions, JS::OwningDecodeOptions, JS::DelazificationOption
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#include "js/ContextOptions.h" // JS::ContextOptionsRef
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#include "js/experimental/JSStencil.h" // JS::Stencil, JS::InstantiationStorage
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#include "js/experimental/CompileScript.h" // JS::FrontendContext, JS::NewFrontendContext, JS::DestroyFrontendContext, JS::SetNativeStackQuota, JS::ThreadStackQuotaForSize, JS::CompilationStorage, JS::CompileGlobalScriptToStencil, JS::CompileModuleScriptToStencil, JS::DecodeStencil, JS::PrepareForInstantiate
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#include "js/friend/ErrorMessages.h" // js::GetErrorMessage, JSMSG_*
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#include "js/loader/ScriptLoadRequest.h"
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#include "ScriptCompression.h"
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#include "js/loader/LoadedScript.h"
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#include "js/loader/ModuleLoadRequest.h"
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#include "js/MemoryFunctions.h"
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#include "js/Modules.h"
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#include "js/PropertyAndElement.h" // JS_DefineProperty
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#include "js/Realm.h"
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#include "js/SourceText.h"
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#include "js/Transcoding.h" // JS::TranscodeRange, JS::TranscodeResult, JS::IsTranscodeFailureResult
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#include "js/Utility.h"
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#include "xpcpublic.h"
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#include "GeckoProfiler.h"
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#include "nsContentSecurityManager.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsIContent.h"
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#include "nsJSUtils.h"
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#include "mozilla/dom/AutoEntryScript.h"
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#include "mozilla/dom/DocGroup.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/JSExecutionContext.h"
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#include "mozilla/dom/ScriptDecoding.h" // mozilla::dom::ScriptDecoding
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#include "mozilla/dom/ScriptSettings.h"
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#include "mozilla/dom/SRILogHelper.h"
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#include "mozilla/dom/WindowContext.h"
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#include "mozilla/Mutex.h" // mozilla::Mutex
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#include "mozilla/net/UrlClassifierFeatureFactory.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/StaticPrefs_dom.h"
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#include "mozilla/StaticPrefs_javascript.h"
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#include "mozilla/StaticPrefs_network.h"
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#include "nsAboutProtocolUtils.h"
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#include "nsGkAtoms.h"
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#include "nsNetUtil.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsIScriptContext.h"
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#include "nsIPrincipal.h"
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#include "nsJSPrincipals.h"
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#include "nsContentPolicyUtils.h"
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#include "nsIClassifiedChannel.h"
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#include "nsIHttpChannel.h"
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#include "nsIHttpChannelInternal.h"
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#include "nsIClassOfService.h"
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#include "nsICacheInfoChannel.h"
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#include "nsITimedChannel.h"
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#include "nsIScriptElement.h"
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#include "nsISupportsPriority.h"
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#include "nsIDocShell.h"
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#include "nsContentUtils.h"
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#include "nsUnicharUtils.h"
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#include "nsError.h"
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#include "nsThreadUtils.h"
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#include "nsDocShellCID.h"
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#include "nsIContentSecurityPolicy.h"
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#include "mozilla/Logging.h"
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#include "nsCRT.h"
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#include "nsContentCreatorFunctions.h"
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#include "nsProxyRelease.h"
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#include "nsSandboxFlags.h"
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#include "nsContentTypeParser.h"
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#include "nsINetworkPredictor.h"
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#include "nsMimeTypes.h"
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#include "mozilla/ConsoleReportCollector.h"
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#include "mozilla/CycleCollectedJSContext.h"
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#include "mozilla/EventQueue.h"
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#include "mozilla/LoadInfo.h"
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#include "ReferrerInfo.h"
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#include "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/ScopeExit.h"
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#include "mozilla/TaskController.h"
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#include "mozilla/Telemetry.h"
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#include "mozilla/TimeStamp.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/Unused.h"
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#include "mozilla/Utf8.h" // mozilla::Utf8Unit
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#include "nsIScriptError.h"
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#include "nsIAsyncOutputStream.h"
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#include "js/loader/ModuleLoaderBase.h"
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#include "mozilla/Maybe.h"
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using JS::SourceText;
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using namespace JS::loader;
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using mozilla::Telemetry::LABELS_DOM_SCRIPT_PRELOAD_RESULT;
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namespace mozilla::dom {
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LazyLogModule ScriptLoader::gCspPRLog("CSP");
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LazyLogModule ScriptLoader::gScriptLoaderLog("ScriptLoader");
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#undef LOG
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#define LOG(args) \
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MOZ_LOG(ScriptLoader::gScriptLoaderLog, mozilla::LogLevel::Debug, args)
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#define LOG_ENABLED() \
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MOZ_LOG_TEST(ScriptLoader::gScriptLoaderLog, mozilla::LogLevel::Debug)
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// Alternate Data MIME type used by the ScriptLoader to register that we want to
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// store bytecode without reading it.
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static constexpr auto kNullMimeType = "javascript/null"_ns;
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/////////////////////////////////////////////////////////////
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// AsyncCompileShutdownObserver
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/////////////////////////////////////////////////////////////
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NS_IMPL_ISUPPORTS(AsyncCompileShutdownObserver, nsIObserver)
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void AsyncCompileShutdownObserver::OnShutdown() {
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if (mScriptLoader) {
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mScriptLoader->Destroy();
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MOZ_ASSERT(!mScriptLoader);
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}
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}
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void AsyncCompileShutdownObserver::Unregister() {
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if (mScriptLoader) {
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mScriptLoader = nullptr;
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nsContentUtils::UnregisterShutdownObserver(this);
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}
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}
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NS_IMETHODIMP
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AsyncCompileShutdownObserver::Observe(nsISupports* aSubject, const char* aTopic,
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const char16_t* aData) {
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OnShutdown();
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return NS_OK;
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}
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//////////////////////////////////////////////////////////////
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// ScriptLoader::PreloadInfo
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//////////////////////////////////////////////////////////////
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inline void ImplCycleCollectionUnlink(ScriptLoader::PreloadInfo& aField) {
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ImplCycleCollectionUnlink(aField.mRequest);
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}
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inline void ImplCycleCollectionTraverse(
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nsCycleCollectionTraversalCallback& aCallback,
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ScriptLoader::PreloadInfo& aField, const char* aName, uint32_t aFlags = 0) {
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ImplCycleCollectionTraverse(aCallback, aField.mRequest, aName, aFlags);
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}
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//////////////////////////////////////////////////////////////
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// ScriptLoader
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//////////////////////////////////////////////////////////////
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ScriptLoader)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION(ScriptLoader, mNonAsyncExternalScriptInsertedRequests,
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mLoadingAsyncRequests, mLoadedAsyncRequests,
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mOffThreadCompilingRequests, mDeferRequests,
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mXSLTRequests, mParserBlockingRequest,
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mBytecodeEncodingQueue, mPreloads,
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mPendingChildLoaders, mModuleLoader,
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mWebExtModuleLoaders, mShadowRealmModuleLoaders)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(ScriptLoader)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(ScriptLoader)
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ScriptLoader::ScriptLoader(Document* aDocument)
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: mDocument(aDocument),
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mParserBlockingBlockerCount(0),
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mBlockerCount(0),
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mNumberOfProcessors(0),
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mTotalFullParseSize(0),
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mPhysicalSizeOfMemory(-1),
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mEnabled(true),
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mDeferEnabled(false),
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mSpeculativeOMTParsingEnabled(false),
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mDeferCheckpointReached(false),
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mBlockingDOMContentLoaded(false),
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mLoadEventFired(false),
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mGiveUpEncoding(false),
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mReporter(new ConsoleReportCollector()) {
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LOG(("ScriptLoader::ScriptLoader %p", this));
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mSpeculativeOMTParsingEnabled = StaticPrefs::
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dom_script_loader_external_scripts_speculative_omt_parse_enabled();
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mShutdownObserver = new AsyncCompileShutdownObserver(this);
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nsContentUtils::RegisterShutdownObserver(mShutdownObserver);
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}
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ScriptLoader::~ScriptLoader() {
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LOG(("ScriptLoader::~ScriptLoader %p", this));
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mObservers.Clear();
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if (mParserBlockingRequest) {
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FireScriptAvailable(NS_ERROR_ABORT, mParserBlockingRequest);
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}
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for (ScriptLoadRequest* req = mXSLTRequests.getFirst(); req;
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req = req->getNext()) {
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FireScriptAvailable(NS_ERROR_ABORT, req);
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}
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for (ScriptLoadRequest* req = mDeferRequests.getFirst(); req;
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req = req->getNext()) {
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FireScriptAvailable(NS_ERROR_ABORT, req);
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}
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for (ScriptLoadRequest* req = mLoadingAsyncRequests.getFirst(); req;
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req = req->getNext()) {
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FireScriptAvailable(NS_ERROR_ABORT, req);
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}
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for (ScriptLoadRequest* req = mLoadedAsyncRequests.getFirst(); req;
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req = req->getNext()) {
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FireScriptAvailable(NS_ERROR_ABORT, req);
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}
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for (ScriptLoadRequest* req =
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mNonAsyncExternalScriptInsertedRequests.getFirst();
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req; req = req->getNext()) {
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FireScriptAvailable(NS_ERROR_ABORT, req);
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}
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// Unblock the kids, in case any of them moved to a different document
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// subtree in the meantime and therefore aren't actually going away.
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for (uint32_t j = 0; j < mPendingChildLoaders.Length(); ++j) {
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mPendingChildLoaders[j]->RemoveParserBlockingScriptExecutionBlocker();
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}
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for (size_t i = 0; i < mPreloads.Length(); i++) {
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AccumulateCategorical(LABELS_DOM_SCRIPT_PRELOAD_RESULT::NotUsed);
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}
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if (mShutdownObserver) {
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mShutdownObserver->Unregister();
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mShutdownObserver = nullptr;
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}
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mModuleLoader = nullptr;
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}
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void ScriptLoader::SetGlobalObject(nsIGlobalObject* aGlobalObject) {
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if (!aGlobalObject) {
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// The document is being detached.
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CancelAndClearScriptLoadRequests();
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return;
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}
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MOZ_ASSERT(!HasPendingRequests());
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if (!mModuleLoader) {
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// The module loader is associated with a global object, so don't create it
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// until we have a global set.
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mModuleLoader = new ModuleLoader(this, aGlobalObject, ModuleLoader::Normal);
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}
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MOZ_ASSERT(mModuleLoader->GetGlobalObject() == aGlobalObject);
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MOZ_ASSERT(aGlobalObject->GetModuleLoader(dom::danger::GetJSContext()) ==
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mModuleLoader);
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}
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void ScriptLoader::RegisterContentScriptModuleLoader(ModuleLoader* aLoader) {
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MOZ_ASSERT(aLoader);
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MOZ_ASSERT(aLoader->GetScriptLoader() == this);
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mWebExtModuleLoaders.AppendElement(aLoader);
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}
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void ScriptLoader::RegisterShadowRealmModuleLoader(ModuleLoader* aLoader) {
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MOZ_ASSERT(aLoader);
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MOZ_ASSERT(aLoader->GetScriptLoader() == this);
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mShadowRealmModuleLoaders.AppendElement(aLoader);
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}
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// Collect telemtry data about the cache information, and the kind of source
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// which are being loaded, and where it is being loaded from.
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static void CollectScriptTelemetry(ScriptLoadRequest* aRequest) {
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using namespace mozilla::Telemetry;
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MOZ_ASSERT(aRequest->IsFetching());
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// Skip this function if we are not running telemetry.
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if (!CanRecordExtended()) {
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return;
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}
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// Report the script kind.
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if (aRequest->IsModuleRequest()) {
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AccumulateCategorical(LABELS_DOM_SCRIPT_KIND::ModuleScript);
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} else {
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AccumulateCategorical(LABELS_DOM_SCRIPT_KIND::ClassicScript);
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}
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// Report the type of source. This is used to monitor the status of the
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// JavaScript Start-up Bytecode Cache, with the expectation of an almost zero
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// source-fallback and alternate-data being roughtly equal to source loads.
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if (aRequest->mFetchSourceOnly) {
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if (aRequest->GetScriptLoadContext()->mIsInline) {
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AccumulateCategorical(LABELS_DOM_SCRIPT_LOADING_SOURCE::Inline);
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} else if (aRequest->IsTextSource()) {
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AccumulateCategorical(LABELS_DOM_SCRIPT_LOADING_SOURCE::SourceFallback);
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}
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} else {
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if (aRequest->IsTextSource()) {
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AccumulateCategorical(LABELS_DOM_SCRIPT_LOADING_SOURCE::Source);
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} else if (aRequest->IsBytecode()) {
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AccumulateCategorical(LABELS_DOM_SCRIPT_LOADING_SOURCE::AltData);
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}
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}
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}
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// Helper method for checking if the script element is an event-handler
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// This means that it has both a for-attribute and a event-attribute.
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// Also, if the for-attribute has a value that matches "\s*window\s*",
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// and the event-attribute matches "\s*onload([ \(].*)?" then it isn't an
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// eventhandler. (both matches are case insensitive).
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// This is how IE seems to filter out a window's onload handler from a
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// <script for=... event=...> element.
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static bool IsScriptEventHandler(ScriptKind kind, nsIContent* aScriptElement) {
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if (kind != ScriptKind::eClassic) {
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return false;
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}
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if (!aScriptElement->IsHTMLElement()) {
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return false;
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}
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nsAutoString forAttr, eventAttr;
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if (!aScriptElement->AsElement()->GetAttr(nsGkAtoms::_for, forAttr) ||
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!aScriptElement->AsElement()->GetAttr(nsGkAtoms::event, eventAttr)) {
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return false;
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}
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const nsAString& for_str =
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nsContentUtils::TrimWhitespace<nsCRT::IsAsciiSpace>(forAttr);
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if (!for_str.LowerCaseEqualsLiteral("window")) {
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return true;
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}
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// We found for="window", now check for event="onload".
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const nsAString& event_str =
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nsContentUtils::TrimWhitespace<nsCRT::IsAsciiSpace>(eventAttr, false);
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if (!StringBeginsWith(event_str, u"onload"_ns,
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nsCaseInsensitiveStringComparator)) {
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// It ain't "onload.*".
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return true;
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}
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nsAutoString::const_iterator start, end;
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event_str.BeginReading(start);
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event_str.EndReading(end);
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start.advance(6); // advance past "onload"
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if (start != end && *start != '(' && *start != ' ') {
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// We got onload followed by something other than space or
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// '('. Not good enough.
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return true;
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}
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return false;
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}
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nsContentPolicyType ScriptLoadRequestToContentPolicyType(
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ScriptLoadRequest* aRequest) {
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if (aRequest->GetScriptLoadContext()->IsPreload()) {
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return aRequest->IsModuleRequest()
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? nsIContentPolicy::TYPE_INTERNAL_MODULE_PRELOAD
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: nsIContentPolicy::TYPE_INTERNAL_SCRIPT_PRELOAD;
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}
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return aRequest->IsModuleRequest() ? nsIContentPolicy::TYPE_INTERNAL_MODULE
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: nsIContentPolicy::TYPE_INTERNAL_SCRIPT;
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}
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nsresult ScriptLoader::CheckContentPolicy(Document* aDocument,
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nsIScriptElement* aElement,
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const nsAString& aType,
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const nsAString& aNonce,
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ScriptLoadRequest* aRequest) {
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nsContentPolicyType contentPolicyType =
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ScriptLoadRequestToContentPolicyType(aRequest);
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nsCOMPtr<nsINode> requestingNode = do_QueryInterface(aElement);
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nsCOMPtr<nsILoadInfo> secCheckLoadInfo = new net::LoadInfo(
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aDocument->NodePrincipal(), // loading principal
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aDocument->NodePrincipal(), // triggering principal
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requestingNode, nsILoadInfo::SEC_ONLY_FOR_EXPLICIT_CONTENTSEC_CHECK,
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contentPolicyType);
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secCheckLoadInfo->SetParserCreatedScript(aElement->GetParserCreated() !=
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mozilla::dom::NOT_FROM_PARSER);
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// Use nonce of the current element, instead of the preload, because those
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// are allowed to differ.
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secCheckLoadInfo->SetCspNonce(aNonce);
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if (aRequest->mIntegrity.IsValid()) {
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MOZ_ASSERT(!aRequest->mIntegrity.IsEmpty());
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secCheckLoadInfo->SetIntegrityMetadata(
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aRequest->mIntegrity.GetIntegrityString());
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}
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int16_t shouldLoad = nsIContentPolicy::ACCEPT;
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nsresult rv = NS_CheckContentLoadPolicy(
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aRequest->mURI, secCheckLoadInfo, NS_LossyConvertUTF16toASCII(aType),
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&shouldLoad, nsContentUtils::GetContentPolicy());
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if (NS_FAILED(rv) || NS_CP_REJECTED(shouldLoad)) {
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if (NS_FAILED(rv) || shouldLoad != nsIContentPolicy::REJECT_TYPE) {
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return NS_ERROR_CONTENT_BLOCKED;
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}
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return NS_ERROR_CONTENT_BLOCKED_SHOW_ALT;
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}
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return NS_OK;
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}
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/* static */
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bool ScriptLoader::IsAboutPageLoadingChromeURI(ScriptLoadRequest* aRequest,
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Document* aDocument) {
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// if the uri to be loaded is not of scheme chrome:, there is nothing to do.
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if (!aRequest->mURI->SchemeIs("chrome")) {
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return false;
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}
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// we can either get here with a regular contentPrincipal or with a
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// NullPrincipal in case we are showing an error page in a sandboxed iframe.
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// In either case if the about: page is linkable from content, there is
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// nothing to do.
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uint32_t aboutModuleFlags = 0;
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nsresult rv = NS_OK;
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nsCOMPtr<nsIPrincipal> triggeringPrincipal = aRequest->TriggeringPrincipal();
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if (triggeringPrincipal->GetIsContentPrincipal()) {
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if (!triggeringPrincipal->SchemeIs("about")) {
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return false;
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}
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rv = triggeringPrincipal->GetAboutModuleFlags(&aboutModuleFlags);
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NS_ENSURE_SUCCESS(rv, false);
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} else if (triggeringPrincipal->GetIsNullPrincipal()) {
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nsCOMPtr<nsIURI> docURI = aDocument->GetDocumentURI();
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if (!docURI->SchemeIs("about")) {
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return false;
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}
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|
|
nsCOMPtr<nsIAboutModule> aboutModule;
|
|
rv = NS_GetAboutModule(docURI, getter_AddRefs(aboutModule));
|
|
if (NS_FAILED(rv) || !aboutModule) {
|
|
return false;
|
|
}
|
|
rv = aboutModule->GetURIFlags(docURI, &aboutModuleFlags);
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
if (aboutModuleFlags & nsIAboutModule::MAKE_LINKABLE) {
|
|
return false;
|
|
}
|
|
|
|
// seems like an about page wants to load a chrome URI.
|
|
return true;
|
|
}
|
|
|
|
nsIURI* ScriptLoader::GetBaseURI() const {
|
|
MOZ_ASSERT(mDocument);
|
|
return mDocument->GetDocBaseURI();
|
|
}
|
|
|
|
class ScriptRequestProcessor : public Runnable {
|
|
private:
|
|
RefPtr<ScriptLoader> mLoader;
|
|
RefPtr<ScriptLoadRequest> mRequest;
|
|
|
|
public:
|
|
ScriptRequestProcessor(ScriptLoader* aLoader, ScriptLoadRequest* aRequest)
|
|
: Runnable("dom::ScriptRequestProcessor"),
|
|
mLoader(aLoader),
|
|
mRequest(aRequest) {}
|
|
NS_IMETHOD Run() override { return mLoader->ProcessRequest(mRequest); }
|
|
};
|
|
|
|
void ScriptLoader::RunScriptWhenSafe(ScriptLoadRequest* aRequest) {
|
|
auto* runnable = new ScriptRequestProcessor(this, aRequest);
|
|
nsContentUtils::AddScriptRunner(runnable);
|
|
}
|
|
|
|
nsresult ScriptLoader::RestartLoad(ScriptLoadRequest* aRequest) {
|
|
MOZ_ASSERT(aRequest->IsBytecode());
|
|
aRequest->mScriptBytecode.clearAndFree();
|
|
TRACE_FOR_TEST(aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
"scriptloader_fallback");
|
|
|
|
// Notify preload restart so that we can register this preload request again.
|
|
aRequest->GetScriptLoadContext()->NotifyRestart(mDocument);
|
|
|
|
// Start a new channel from which we explicitly request to stream the source
|
|
// instead of the bytecode.
|
|
aRequest->mFetchSourceOnly = true;
|
|
nsresult rv;
|
|
if (aRequest->IsModuleRequest()) {
|
|
rv = aRequest->AsModuleRequest()->RestartModuleLoad();
|
|
} else {
|
|
rv = StartLoad(aRequest, Nothing());
|
|
}
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Close the current channel and this ScriptLoadHandler as we created a new
|
|
// one for the same request.
|
|
return NS_BINDING_RETARGETED;
|
|
}
|
|
|
|
nsresult ScriptLoader::StartLoad(
|
|
ScriptLoadRequest* aRequest,
|
|
const Maybe<nsAutoString>& aCharsetForPreload) {
|
|
if (aRequest->IsModuleRequest()) {
|
|
return aRequest->AsModuleRequest()->StartModuleLoad();
|
|
}
|
|
|
|
return StartClassicLoad(aRequest, aCharsetForPreload);
|
|
}
|
|
|
|
nsresult ScriptLoader::StartClassicLoad(
|
|
ScriptLoadRequest* aRequest,
|
|
const Maybe<nsAutoString>& aCharsetForPreload) {
|
|
MOZ_ASSERT(aRequest->IsFetching());
|
|
NS_ENSURE_TRUE(mDocument, NS_ERROR_NULL_POINTER);
|
|
aRequest->SetUnknownDataType();
|
|
|
|
// If this document is sandboxed without 'allow-scripts', abort.
|
|
if (mDocument->HasScriptsBlockedBySandbox()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (LOG_ENABLED()) {
|
|
nsAutoCString url;
|
|
aRequest->mURI->GetAsciiSpec(url);
|
|
LOG(("ScriptLoadRequest (%p): Start Classic Load (url = %s)", aRequest,
|
|
url.get()));
|
|
}
|
|
|
|
nsSecurityFlags securityFlags =
|
|
nsContentSecurityManager::ComputeSecurityFlags(
|
|
aRequest->CORSMode(), nsContentSecurityManager::CORSSecurityMapping::
|
|
CORS_NONE_MAPS_TO_DISABLED_CORS_CHECKS);
|
|
|
|
securityFlags |= nsILoadInfo::SEC_ALLOW_CHROME;
|
|
|
|
nsresult rv = StartLoadInternal(aRequest, securityFlags, aCharsetForPreload);
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
static bool IsWebExtensionRequest(ScriptLoadRequest* aRequest) {
|
|
if (!aRequest->IsModuleRequest()) {
|
|
return false;
|
|
}
|
|
|
|
ModuleLoader* loader =
|
|
ModuleLoader::From(aRequest->AsModuleRequest()->mLoader);
|
|
return loader->GetKind() == ModuleLoader::WebExtension;
|
|
}
|
|
|
|
static nsresult CreateChannelForScriptLoading(nsIChannel** aOutChannel,
|
|
Document* aDocument,
|
|
ScriptLoadRequest* aRequest,
|
|
nsSecurityFlags aSecurityFlags) {
|
|
nsContentPolicyType contentPolicyType =
|
|
ScriptLoadRequestToContentPolicyType(aRequest);
|
|
nsCOMPtr<nsINode> context;
|
|
if (aRequest->GetScriptLoadContext()->GetScriptElement()) {
|
|
context =
|
|
do_QueryInterface(aRequest->GetScriptLoadContext()->GetScriptElement());
|
|
} else {
|
|
context = aDocument;
|
|
}
|
|
|
|
nsCOMPtr<nsILoadGroup> loadGroup = aDocument->GetDocumentLoadGroup();
|
|
nsCOMPtr<nsPIDOMWindowOuter> window = aDocument->GetWindow();
|
|
NS_ENSURE_TRUE(window, NS_ERROR_NULL_POINTER);
|
|
nsIDocShell* docshell = window->GetDocShell();
|
|
nsCOMPtr<nsIInterfaceRequestor> prompter(do_QueryInterface(docshell));
|
|
|
|
return NS_NewChannelWithTriggeringPrincipal(
|
|
aOutChannel, aRequest->mURI, context, aRequest->TriggeringPrincipal(),
|
|
aSecurityFlags, contentPolicyType,
|
|
nullptr, // aPerformanceStorage
|
|
loadGroup, prompter);
|
|
}
|
|
|
|
static void PrepareLoadInfoForScriptLoading(nsIChannel* aChannel,
|
|
const ScriptLoadRequest* aRequest) {
|
|
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
|
|
loadInfo->SetParserCreatedScript(aRequest->ParserMetadata() ==
|
|
ParserMetadata::ParserInserted);
|
|
loadInfo->SetCspNonce(aRequest->Nonce());
|
|
if (aRequest->mIntegrity.IsValid()) {
|
|
MOZ_ASSERT(!aRequest->mIntegrity.IsEmpty());
|
|
loadInfo->SetIntegrityMetadata(aRequest->mIntegrity.GetIntegrityString());
|
|
}
|
|
}
|
|
|
|
// static
|
|
void ScriptLoader::PrepareCacheInfoChannel(nsIChannel* aChannel,
|
|
ScriptLoadRequest* aRequest) {
|
|
// To avoid decoding issues, the build-id is part of the bytecode MIME type
|
|
// constant.
|
|
aRequest->mCacheInfo = nullptr;
|
|
nsCOMPtr<nsICacheInfoChannel> cic(do_QueryInterface(aChannel));
|
|
if (cic && StaticPrefs::dom_script_loader_bytecode_cache_enabled()) {
|
|
MOZ_ASSERT(!IsWebExtensionRequest(aRequest),
|
|
"Can not bytecode cache WebExt code");
|
|
if (!aRequest->mFetchSourceOnly) {
|
|
// Inform the HTTP cache that we prefer to have information coming from
|
|
// the bytecode cache instead of the sources, if such entry is already
|
|
// registered.
|
|
LOG(("ScriptLoadRequest (%p): Maybe request bytecode", aRequest));
|
|
cic->PreferAlternativeDataType(
|
|
ScriptLoader::BytecodeMimeTypeFor(aRequest), ""_ns,
|
|
nsICacheInfoChannel::PreferredAlternativeDataDeliveryType::ASYNC);
|
|
} else {
|
|
// If we are explicitly loading from the sources, such as after a
|
|
// restarted request, we might still want to save the bytecode after.
|
|
//
|
|
// The following tell the cache to look for an alternative data type which
|
|
// does not exist, such that we can later save the bytecode with a
|
|
// different alternative data type.
|
|
LOG(("ScriptLoadRequest (%p): Request saving bytecode later", aRequest));
|
|
cic->PreferAlternativeDataType(
|
|
kNullMimeType, ""_ns,
|
|
nsICacheInfoChannel::PreferredAlternativeDataDeliveryType::ASYNC);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void AdjustPriorityForNonLinkPreloadScripts(
|
|
nsIChannel* aChannel, ScriptLoadRequest* aRequest) {
|
|
MOZ_ASSERT(!aRequest->GetScriptLoadContext()->IsLinkPreloadScript());
|
|
|
|
if (!StaticPrefs::network_fetchpriority_enabled()) {
|
|
return;
|
|
}
|
|
|
|
if (nsCOMPtr<nsISupportsPriority> supportsPriority =
|
|
do_QueryInterface(aChannel)) {
|
|
const RequestPriority fetchPriority = aRequest->FetchPriority();
|
|
// The spec defines the priority to be set in an implementation defined
|
|
// manner (<https://fetch.spec.whatwg.org/#concept-fetch>, step 15 and
|
|
// <https://html.spec.whatwg.org/#concept-script-fetch-options-fetch-priority>).
|
|
// For web-compatibility, the fetch priority mapping from
|
|
// <https://web.dev/fetch-priority/#browser-priority-and-fetchpriority> is
|
|
// taken.
|
|
switch (fetchPriority) {
|
|
case RequestPriority::Auto:
|
|
LOG(("ScriptLoader::%s:, fetchpriority=auto", __FUNCTION__));
|
|
break;
|
|
case RequestPriority::Low: {
|
|
LOG(("ScriptLoader::%s:, fetchpriority=low, setting priority",
|
|
__FUNCTION__));
|
|
supportsPriority->SetPriority(nsISupportsPriority::PRIORITY_LOW);
|
|
break;
|
|
}
|
|
case RequestPriority::High: {
|
|
LOG(("ScriptLoader::%s:, fetchpriority=high, setting priority",
|
|
__FUNCTION__));
|
|
supportsPriority->SetPriority(nsISupportsPriority::PRIORITY_HIGH);
|
|
break;
|
|
}
|
|
default: {
|
|
MOZ_ASSERT_UNREACHABLE();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// static
|
|
void ScriptLoader::PrepareRequestPriorityAndRequestDependencies(
|
|
nsIChannel* aChannel, ScriptLoadRequest* aRequest) {
|
|
if (aRequest->GetScriptLoadContext()->IsLinkPreloadScript()) {
|
|
// This is <link rel="preload" as="script"> or <link rel="modulepreload">
|
|
// initiated speculative load, put it to the group that is not blocked by
|
|
// leaders and doesn't block follower at the same time. Giving it a much
|
|
// higher priority will make this request be processed ahead of other
|
|
// Unblocked requests, but with the same weight as Leaders. This will make
|
|
// us behave similar way for both http2 and http1.
|
|
ScriptLoadContext::PrioritizeAsPreload(aChannel);
|
|
ScriptLoadContext::AddLoadBackgroundFlag(aChannel);
|
|
} else if (nsCOMPtr<nsIClassOfService> cos = do_QueryInterface(aChannel)) {
|
|
AdjustPriorityForNonLinkPreloadScripts(aChannel, aRequest);
|
|
|
|
if (aRequest->GetScriptLoadContext()->mScriptFromHead &&
|
|
aRequest->GetScriptLoadContext()->IsBlockingScript()) {
|
|
// synchronous head scripts block loading of most other non js/css
|
|
// content such as images, Leader implicitely disallows tailing
|
|
cos->AddClassFlags(nsIClassOfService::Leader);
|
|
} else if (aRequest->GetScriptLoadContext()->IsDeferredScript() &&
|
|
!StaticPrefs::network_http_tailing_enabled()) {
|
|
// Bug 1395525 and the !StaticPrefs::network_http_tailing_enabled() bit:
|
|
// We want to make sure that turing tailing off by the pref makes the
|
|
// browser behave exactly the same way as before landing the tailing
|
|
// patch.
|
|
|
|
// head/body deferred scripts are blocked by leaders but are not
|
|
// allowed tailing because they block DOMContentLoaded
|
|
cos->AddClassFlags(nsIClassOfService::TailForbidden);
|
|
} else {
|
|
// other scripts (=body sync or head/body async) are neither blocked
|
|
// nor prioritized
|
|
cos->AddClassFlags(nsIClassOfService::Unblocked);
|
|
|
|
if (aRequest->GetScriptLoadContext()->IsAsyncScript()) {
|
|
// async scripts are allowed tailing, since those and only those
|
|
// don't block DOMContentLoaded; this flag doesn't enforce tailing,
|
|
// just overweights the Unblocked flag when the channel is found
|
|
// to be a thrird-party tracker and thus set the Tail flag to engage
|
|
// tailing.
|
|
cos->AddClassFlags(nsIClassOfService::TailAllowed);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// static
|
|
nsresult ScriptLoader::PrepareHttpRequestAndInitiatorType(
|
|
nsIChannel* aChannel, ScriptLoadRequest* aRequest,
|
|
const Maybe<nsAutoString>& aCharsetForPreload) {
|
|
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(aChannel));
|
|
nsresult rv = NS_OK;
|
|
|
|
if (httpChannel) {
|
|
// HTTP content negotation has little value in this context.
|
|
nsAutoCString acceptTypes("*/*");
|
|
rv = httpChannel->SetRequestHeader("Accept"_ns, acceptTypes, false);
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
|
|
|
nsCOMPtr<nsIReferrerInfo> referrerInfo =
|
|
new ReferrerInfo(aRequest->mReferrer, aRequest->ReferrerPolicy());
|
|
rv = httpChannel->SetReferrerInfoWithoutClone(referrerInfo);
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
|
|
|
nsCOMPtr<nsIHttpChannelInternal> internalChannel(
|
|
do_QueryInterface(httpChannel));
|
|
if (internalChannel) {
|
|
rv = internalChannel->SetIntegrityMetadata(
|
|
aRequest->mIntegrity.GetIntegrityString());
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
|
}
|
|
|
|
nsAutoString hintCharset;
|
|
if (!aRequest->GetScriptLoadContext()->IsPreload() &&
|
|
aRequest->GetScriptLoadContext()->GetScriptElement()) {
|
|
aRequest->GetScriptLoadContext()->GetScriptElement()->GetScriptCharset(
|
|
hintCharset);
|
|
} else if (aCharsetForPreload.isSome()) {
|
|
hintCharset = aCharsetForPreload.ref();
|
|
}
|
|
|
|
rv = httpChannel->SetClassicScriptHintCharset(hintCharset);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
// Set the initiator type
|
|
nsCOMPtr<nsITimedChannel> timedChannel(do_QueryInterface(httpChannel));
|
|
if (timedChannel) {
|
|
if (aRequest->mEarlyHintPreloaderId) {
|
|
timedChannel->SetInitiatorType(u"early-hints"_ns);
|
|
} else if (aRequest->GetScriptLoadContext()->IsLinkPreloadScript()) {
|
|
timedChannel->SetInitiatorType(u"link"_ns);
|
|
} else {
|
|
timedChannel->SetInitiatorType(u"script"_ns);
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult ScriptLoader::PrepareIncrementalStreamLoader(
|
|
nsIIncrementalStreamLoader** aOutLoader, ScriptLoadRequest* aRequest) {
|
|
UniquePtr<mozilla::dom::SRICheckDataVerifier> sriDataVerifier;
|
|
if (!aRequest->mIntegrity.IsEmpty()) {
|
|
nsAutoCString sourceUri;
|
|
if (mDocument->GetDocumentURI()) {
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
sriDataVerifier = MakeUnique<SRICheckDataVerifier>(aRequest->mIntegrity,
|
|
sourceUri, mReporter);
|
|
}
|
|
|
|
RefPtr<ScriptLoadHandler> handler =
|
|
new ScriptLoadHandler(this, aRequest, std::move(sriDataVerifier));
|
|
|
|
nsresult rv = NS_NewIncrementalStreamLoader(aOutLoader, handler);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
return rv;
|
|
}
|
|
|
|
nsresult ScriptLoader::StartLoadInternal(
|
|
ScriptLoadRequest* aRequest, nsSecurityFlags securityFlags,
|
|
const Maybe<nsAutoString>& aCharsetForPreload) {
|
|
nsCOMPtr<nsIChannel> channel;
|
|
nsresult rv = CreateChannelForScriptLoading(
|
|
getter_AddRefs(channel), mDocument, aRequest, securityFlags);
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (aRequest->mEarlyHintPreloaderId) {
|
|
nsCOMPtr<nsIHttpChannelInternal> channelInternal =
|
|
do_QueryInterface(channel);
|
|
NS_ENSURE_TRUE(channelInternal != nullptr, NS_ERROR_FAILURE);
|
|
|
|
rv = channelInternal->SetEarlyHintPreloaderId(
|
|
aRequest->mEarlyHintPreloaderId);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
PrepareLoadInfoForScriptLoading(channel, aRequest);
|
|
|
|
nsCOMPtr<nsIScriptGlobalObject> scriptGlobal = GetScriptGlobalObject();
|
|
if (!scriptGlobal) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
ScriptLoader::PrepareCacheInfoChannel(channel, aRequest);
|
|
|
|
LOG(("ScriptLoadRequest (%p): mode=%u tracking=%d", aRequest,
|
|
unsigned(aRequest->GetScriptLoadContext()->mScriptMode),
|
|
aRequest->GetScriptLoadContext()->IsTracking()));
|
|
|
|
PrepareRequestPriorityAndRequestDependencies(channel, aRequest);
|
|
|
|
rv =
|
|
PrepareHttpRequestAndInitiatorType(channel, aRequest, aCharsetForPreload);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
mozilla::net::PredictorLearn(
|
|
aRequest->mURI, mDocument->GetDocumentURI(),
|
|
nsINetworkPredictor::LEARN_LOAD_SUBRESOURCE,
|
|
mDocument->NodePrincipal()->OriginAttributesRef());
|
|
|
|
nsCOMPtr<nsIIncrementalStreamLoader> loader;
|
|
rv = PrepareIncrementalStreamLoader(getter_AddRefs(loader), aRequest);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
auto key = PreloadHashKey::CreateAsScript(
|
|
aRequest->mURI, aRequest->CORSMode(), aRequest->mKind);
|
|
aRequest->GetScriptLoadContext()->NotifyOpen(
|
|
key, channel, mDocument,
|
|
aRequest->GetScriptLoadContext()->IsLinkPreloadScript(),
|
|
aRequest->IsModuleRequest());
|
|
|
|
rv = channel->AsyncOpen(loader);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
// Make sure to inform any <link preload> tags about failure to load the
|
|
// resource.
|
|
aRequest->GetScriptLoadContext()->NotifyStart(channel);
|
|
aRequest->GetScriptLoadContext()->NotifyStop(rv);
|
|
}
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
bool ScriptLoader::PreloadURIComparator::Equals(const PreloadInfo& aPi,
|
|
nsIURI* const& aURI) const {
|
|
bool same;
|
|
return NS_SUCCEEDED(aPi.mRequest->mURI->Equals(aURI, &same)) && same;
|
|
}
|
|
|
|
static bool CSPAllowsInlineScript(nsIScriptElement* aElement,
|
|
const nsAString& aNonce,
|
|
Document* aDocument) {
|
|
nsCOMPtr<nsIContentSecurityPolicy> csp = aDocument->GetCsp();
|
|
if (!csp) {
|
|
// no CSP --> allow
|
|
return true;
|
|
}
|
|
|
|
bool parserCreated =
|
|
aElement->GetParserCreated() != mozilla::dom::NOT_FROM_PARSER;
|
|
nsCOMPtr<Element> element = do_QueryInterface(aElement);
|
|
|
|
bool allowInlineScript = false;
|
|
nsresult rv = csp->GetAllowsInline(
|
|
nsIContentSecurityPolicy::SCRIPT_SRC_ELEM_DIRECTIVE,
|
|
false /* aHasUnsafeHash */, aNonce, parserCreated, element,
|
|
nullptr /* nsICSPEventListener */, u""_ns,
|
|
aElement->GetScriptLineNumber(), aElement->GetScriptColumnNumber() + 1,
|
|
&allowInlineScript);
|
|
return NS_SUCCEEDED(rv) && allowInlineScript;
|
|
}
|
|
|
|
namespace {
|
|
RequestPriority FetchPriorityToRequestPriority(
|
|
const FetchPriority aFetchPriority) {
|
|
switch (aFetchPriority) {
|
|
case FetchPriority::High:
|
|
return RequestPriority::High;
|
|
case FetchPriority::Low:
|
|
return RequestPriority::Low;
|
|
case FetchPriority::Auto:
|
|
return RequestPriority::Auto;
|
|
}
|
|
|
|
MOZ_ASSERT_UNREACHABLE();
|
|
return RequestPriority::Auto;
|
|
}
|
|
} // namespace
|
|
|
|
already_AddRefed<ScriptLoadRequest> ScriptLoader::CreateLoadRequest(
|
|
ScriptKind aKind, nsIURI* aURI, nsIScriptElement* aElement,
|
|
nsIPrincipal* aTriggeringPrincipal, CORSMode aCORSMode,
|
|
const nsAString& aNonce, RequestPriority aRequestPriority,
|
|
const SRIMetadata& aIntegrity, ReferrerPolicy aReferrerPolicy,
|
|
ParserMetadata aParserMetadata) {
|
|
nsIURI* referrer = mDocument->GetDocumentURIAsReferrer();
|
|
nsCOMPtr<Element> domElement = do_QueryInterface(aElement);
|
|
RefPtr<ScriptFetchOptions> fetchOptions =
|
|
new ScriptFetchOptions(aCORSMode, aNonce, aRequestPriority,
|
|
aParserMetadata, aTriggeringPrincipal, domElement);
|
|
RefPtr<ScriptLoadContext> context = new ScriptLoadContext();
|
|
|
|
if (aKind == ScriptKind::eClassic || aKind == ScriptKind::eImportMap) {
|
|
RefPtr<ScriptLoadRequest> aRequest =
|
|
new ScriptLoadRequest(aKind, aURI, aReferrerPolicy, fetchOptions,
|
|
aIntegrity, referrer, context);
|
|
|
|
return aRequest.forget();
|
|
}
|
|
|
|
MOZ_ASSERT(aKind == ScriptKind::eModule);
|
|
RefPtr<ModuleLoadRequest> aRequest = ModuleLoader::CreateTopLevel(
|
|
aURI, aReferrerPolicy, fetchOptions, aIntegrity, referrer, this, context);
|
|
return aRequest.forget();
|
|
}
|
|
|
|
bool ScriptLoader::ProcessScriptElement(nsIScriptElement* aElement,
|
|
const nsAutoString& aTypeAttr) {
|
|
// We need a document to evaluate scripts.
|
|
NS_ENSURE_TRUE(mDocument, false);
|
|
|
|
// Check to see if scripts has been turned off.
|
|
if (!mEnabled || !mDocument->IsScriptEnabled()) {
|
|
return false;
|
|
}
|
|
|
|
NS_ASSERTION(!aElement->IsMalformed(), "Executing malformed script");
|
|
|
|
nsCOMPtr<nsIContent> scriptContent = do_QueryInterface(aElement);
|
|
|
|
ScriptKind scriptKind;
|
|
if (aElement->GetScriptIsModule()) {
|
|
scriptKind = ScriptKind::eModule;
|
|
} else if (aElement->GetScriptIsImportMap()) {
|
|
scriptKind = ScriptKind::eImportMap;
|
|
} else {
|
|
scriptKind = ScriptKind::eClassic;
|
|
}
|
|
|
|
// Step 13. Check that the script is not an eventhandler
|
|
if (IsScriptEventHandler(scriptKind, scriptContent)) {
|
|
return false;
|
|
}
|
|
|
|
// "In modern user agents that support module scripts, the script element with
|
|
// the nomodule attribute will be ignored".
|
|
// "The nomodule attribute must not be specified on module scripts (and will
|
|
// be ignored if it is)."
|
|
if (scriptKind == ScriptKind::eClassic && scriptContent->IsHTMLElement() &&
|
|
scriptContent->AsElement()->HasAttr(nsGkAtoms::nomodule)) {
|
|
return false;
|
|
}
|
|
|
|
// Step 15. and later in the HTML5 spec
|
|
if (aElement->GetScriptExternal()) {
|
|
return ProcessExternalScript(aElement, scriptKind, aTypeAttr,
|
|
scriptContent);
|
|
}
|
|
|
|
return ProcessInlineScript(aElement, scriptKind);
|
|
}
|
|
|
|
static ParserMetadata GetParserMetadata(nsIScriptElement* aElement) {
|
|
return aElement->GetParserCreated() == mozilla::dom::NOT_FROM_PARSER
|
|
? ParserMetadata::NotParserInserted
|
|
: ParserMetadata::ParserInserted;
|
|
}
|
|
|
|
bool ScriptLoader::ProcessExternalScript(nsIScriptElement* aElement,
|
|
ScriptKind aScriptKind,
|
|
const nsAutoString& aTypeAttr,
|
|
nsIContent* aScriptContent) {
|
|
LOG(("ScriptLoader (%p): Process external script for element %p", this,
|
|
aElement));
|
|
|
|
// https://html.spec.whatwg.org/multipage/scripting.html#prepare-the-script-element
|
|
// Step 30.1. If el's type is "importmap", then queue an element task on the
|
|
// DOM manipulation task source given el to fire an event named error at el,
|
|
// and return.
|
|
if (aScriptKind == ScriptKind::eImportMap) {
|
|
NS_DispatchToCurrentThread(
|
|
NewRunnableMethod("nsIScriptElement::FireErrorEvent", aElement,
|
|
&nsIScriptElement::FireErrorEvent));
|
|
nsContentUtils::ReportToConsole(
|
|
nsIScriptError::warningFlag, "Script Loader"_ns, mDocument,
|
|
nsContentUtils::eDOM_PROPERTIES, "ImportMapExternalNotSupported");
|
|
return false;
|
|
}
|
|
|
|
nsCOMPtr<nsIURI> scriptURI = aElement->GetScriptURI();
|
|
if (!scriptURI) {
|
|
// Asynchronously report the failure to create a URI object
|
|
NS_DispatchToCurrentThread(
|
|
NewRunnableMethod("nsIScriptElement::FireErrorEvent", aElement,
|
|
&nsIScriptElement::FireErrorEvent));
|
|
return false;
|
|
}
|
|
|
|
nsAutoString nonce;
|
|
if (nsString* cspNonce = static_cast<nsString*>(
|
|
aScriptContent->GetProperty(nsGkAtoms::nonce))) {
|
|
nonce = *cspNonce;
|
|
}
|
|
|
|
SRIMetadata sriMetadata;
|
|
{
|
|
nsAutoString integrity;
|
|
aScriptContent->AsElement()->GetAttr(nsGkAtoms::integrity, integrity);
|
|
GetSRIMetadata(integrity, &sriMetadata);
|
|
}
|
|
|
|
RefPtr<ScriptLoadRequest> request =
|
|
LookupPreloadRequest(aElement, aScriptKind, sriMetadata);
|
|
|
|
if (request && NS_FAILED(CheckContentPolicy(mDocument, aElement, aTypeAttr,
|
|
nonce, request))) {
|
|
LOG(("ScriptLoader (%p): content policy check failed for preload", this));
|
|
|
|
// Probably plans have changed; even though the preload was allowed seems
|
|
// like the actual load is not; let's cancel the preload request.
|
|
request->Cancel();
|
|
AccumulateCategorical(LABELS_DOM_SCRIPT_PRELOAD_RESULT::RejectedByPolicy);
|
|
return false;
|
|
}
|
|
|
|
// If there are a preloaded request and an import map, we won't use the
|
|
// preloaded request and will try to create a new one for this, because the
|
|
// import map isn't preloaded, and the preloaded request may have used the
|
|
// wrong module specifiers.
|
|
//
|
|
// We use IsModuleFetched() to check if the module has been fetched, if it
|
|
// hasn't been fetched we can simply just reuse it.
|
|
if (request && mModuleLoader->IsModuleFetched(request->mURI) &&
|
|
mModuleLoader->HasImportMapRegistered()) {
|
|
DebugOnly<bool> removed = mModuleLoader->RemoveFetchedModule(request->mURI);
|
|
MOZ_ASSERT(removed);
|
|
request = nullptr;
|
|
}
|
|
|
|
if (request) {
|
|
// Use the preload request.
|
|
|
|
LOG(("ScriptLoadRequest (%p): Using preload request", request.get()));
|
|
|
|
// https://html.spec.whatwg.org/multipage/webappapis.html#fetch-a-module-script-tree
|
|
// Step 1. Disallow further import maps given settings object.
|
|
if (request->IsModuleRequest()) {
|
|
LOG(("ScriptLoadRequest (%p): Disallow further import maps.",
|
|
request.get()));
|
|
mModuleLoader->DisallowImportMaps();
|
|
}
|
|
|
|
// It's possible these attributes changed since we started the preload so
|
|
// update them here.
|
|
request->GetScriptLoadContext()->SetScriptMode(
|
|
aElement->GetScriptDeferred(), aElement->GetScriptAsync(), false);
|
|
|
|
// The request will be added to another list or set as
|
|
// mParserBlockingRequest below.
|
|
if (request->GetScriptLoadContext()->mInCompilingList) {
|
|
mOffThreadCompilingRequests.Remove(request);
|
|
request->GetScriptLoadContext()->mInCompilingList = false;
|
|
}
|
|
|
|
AccumulateCategorical(LABELS_DOM_SCRIPT_PRELOAD_RESULT::Used);
|
|
} else {
|
|
// No usable preload found.
|
|
|
|
nsCOMPtr<nsIPrincipal> principal =
|
|
aElement->GetScriptURITriggeringPrincipal();
|
|
if (!principal) {
|
|
principal = aScriptContent->NodePrincipal();
|
|
}
|
|
|
|
CORSMode ourCORSMode = aElement->GetCORSMode();
|
|
const FetchPriority fetchPriority = aElement->GetFetchPriority();
|
|
ReferrerPolicy referrerPolicy = GetReferrerPolicy(aElement);
|
|
ParserMetadata parserMetadata = GetParserMetadata(aElement);
|
|
|
|
request = CreateLoadRequest(aScriptKind, scriptURI, aElement, principal,
|
|
ourCORSMode, nonce,
|
|
FetchPriorityToRequestPriority(fetchPriority),
|
|
sriMetadata, referrerPolicy, parserMetadata);
|
|
request->GetScriptLoadContext()->mIsInline = false;
|
|
request->GetScriptLoadContext()->SetScriptMode(
|
|
aElement->GetScriptDeferred(), aElement->GetScriptAsync(), false);
|
|
// keep request->GetScriptLoadContext()->mScriptFromHead to false so we
|
|
// don't treat non preloaded scripts as blockers for full page load. See bug
|
|
// 792438.
|
|
|
|
LOG(("ScriptLoadRequest (%p): Created request for external script",
|
|
request.get()));
|
|
|
|
nsresult rv = StartLoad(request, Nothing());
|
|
if (NS_FAILED(rv)) {
|
|
ReportErrorToConsole(request, rv);
|
|
|
|
// Asynchronously report the load failure
|
|
nsCOMPtr<nsIRunnable> runnable =
|
|
NewRunnableMethod("nsIScriptElement::FireErrorEvent", aElement,
|
|
&nsIScriptElement::FireErrorEvent);
|
|
if (mDocument) {
|
|
mDocument->Dispatch(runnable.forget());
|
|
} else {
|
|
NS_DispatchToCurrentThread(runnable.forget());
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// We should still be in loading stage of script unless we're loading a
|
|
// module or speculatively off-main-thread parsing a script.
|
|
NS_ASSERTION(SpeculativeOMTParsingEnabled() ||
|
|
!request->GetScriptLoadContext()->CompileStarted() ||
|
|
request->IsModuleRequest(),
|
|
"Request should not yet be in compiling stage.");
|
|
|
|
if (request->GetScriptLoadContext()->IsAsyncScript()) {
|
|
AddAsyncRequest(request);
|
|
if (request->IsFinished()) {
|
|
// The script is available already. Run it ASAP when the event
|
|
// loop gets a chance to spin.
|
|
|
|
// KVKV TODO: Instead of processing immediately, try off-thread-parsing
|
|
// it and only schedule a pending ProcessRequest if that fails.
|
|
ProcessPendingRequestsAsync();
|
|
}
|
|
return false;
|
|
}
|
|
if (!aElement->GetParserCreated()) {
|
|
// Violate the HTML5 spec in order to make LABjs and the "order" plug-in
|
|
// for RequireJS work with their Gecko-sniffed code path. See
|
|
// http://lists.w3.org/Archives/Public/public-html/2010Oct/0088.html
|
|
request->GetScriptLoadContext()->mIsNonAsyncScriptInserted = true;
|
|
mNonAsyncExternalScriptInsertedRequests.AppendElement(request);
|
|
if (request->IsFinished()) {
|
|
// The script is available already. Run it ASAP when the event
|
|
// loop gets a chance to spin.
|
|
ProcessPendingRequestsAsync();
|
|
}
|
|
return false;
|
|
}
|
|
// we now have a parser-inserted request that may or may not be still
|
|
// loading
|
|
if (request->GetScriptLoadContext()->IsDeferredScript()) {
|
|
// We don't want to run this yet.
|
|
// If we come here, the script is a parser-created script and it has
|
|
// the defer attribute but not the async attribute OR it is a module
|
|
// script without the async attribute. Since a
|
|
// a parser-inserted script is being run, we came here by the parser
|
|
// running the script, which means the parser is still alive and the
|
|
// parse is ongoing.
|
|
NS_ASSERTION(mDocument->GetCurrentContentSink() ||
|
|
aElement->GetParserCreated() == FROM_PARSER_XSLT,
|
|
"Non-XSLT Defer script on a document without an active "
|
|
"parser; bug 592366.");
|
|
AddDeferRequest(request);
|
|
return false;
|
|
}
|
|
|
|
if (aElement->GetParserCreated() == FROM_PARSER_XSLT) {
|
|
// Need to maintain order for XSLT-inserted scripts
|
|
NS_ASSERTION(!mParserBlockingRequest,
|
|
"Parser-blocking scripts and XSLT scripts in the same doc!");
|
|
request->GetScriptLoadContext()->mIsXSLT = true;
|
|
mXSLTRequests.AppendElement(request);
|
|
if (request->IsFinished()) {
|
|
// The script is available already. Run it ASAP when the event
|
|
// loop gets a chance to spin.
|
|
ProcessPendingRequestsAsync();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
if (request->IsFinished() && ReadyToExecuteParserBlockingScripts()) {
|
|
// The request has already been loaded and there are no pending style
|
|
// sheets. If the script comes from the network stream, cheat for
|
|
// performance reasons and avoid a trip through the event loop.
|
|
if (aElement->GetParserCreated() == FROM_PARSER_NETWORK) {
|
|
return ProcessRequest(request) == NS_ERROR_HTMLPARSER_BLOCK;
|
|
}
|
|
// Otherwise, we've got a document.written script, make a trip through
|
|
// the event loop to hide the preload effects from the scripts on the
|
|
// Web page.
|
|
NS_ASSERTION(!mParserBlockingRequest,
|
|
"There can be only one parser-blocking script at a time");
|
|
NS_ASSERTION(mXSLTRequests.isEmpty(),
|
|
"Parser-blocking scripts and XSLT scripts in the same doc!");
|
|
mParserBlockingRequest = request;
|
|
ProcessPendingRequestsAsync();
|
|
return true;
|
|
}
|
|
|
|
// The script hasn't loaded yet or there's a style sheet blocking it.
|
|
// The script will be run when it loads or the style sheet loads.
|
|
NS_ASSERTION(!mParserBlockingRequest,
|
|
"There can be only one parser-blocking script at a time");
|
|
NS_ASSERTION(mXSLTRequests.isEmpty(),
|
|
"Parser-blocking scripts and XSLT scripts in the same doc!");
|
|
mParserBlockingRequest = request;
|
|
return true;
|
|
}
|
|
|
|
bool ScriptLoader::ProcessInlineScript(nsIScriptElement* aElement,
|
|
ScriptKind aScriptKind) {
|
|
// Is this document sandboxed without 'allow-scripts'?
|
|
if (mDocument->HasScriptsBlockedBySandbox()) {
|
|
return false;
|
|
}
|
|
|
|
nsCOMPtr<nsINode> node = do_QueryInterface(aElement);
|
|
nsAutoString nonce;
|
|
if (nsString* cspNonce =
|
|
static_cast<nsString*>(node->GetProperty(nsGkAtoms::nonce))) {
|
|
nonce = *cspNonce;
|
|
}
|
|
|
|
// Does CSP allow this inline script to run?
|
|
if (!CSPAllowsInlineScript(aElement, nonce, mDocument)) {
|
|
return false;
|
|
}
|
|
|
|
// Check if adding an import map script is allowed. If not, we bail out
|
|
// early to prevent creating a load request.
|
|
if (aScriptKind == ScriptKind::eImportMap) {
|
|
// https://html.spec.whatwg.org/multipage/scripting.html#prepare-the-script-element
|
|
// Step 31.2 type is "importmap":
|
|
// Step 1. If el's relevant global object's import maps allowed is false,
|
|
// then queue an element task on the DOM manipulation task source given el
|
|
// to fire an event named error at el, and return.
|
|
if (!mModuleLoader->IsImportMapAllowed()) {
|
|
NS_WARNING("ScriptLoader: import maps allowed is false.");
|
|
const char* msg = mModuleLoader->HasImportMapRegistered()
|
|
? "ImportMapNotAllowedMultiple"
|
|
: "ImportMapNotAllowedAfterModuleLoad";
|
|
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
|
|
"Script Loader"_ns, mDocument,
|
|
nsContentUtils::eDOM_PROPERTIES, msg);
|
|
NS_DispatchToCurrentThread(
|
|
NewRunnableMethod("nsIScriptElement::FireErrorEvent", aElement,
|
|
&nsIScriptElement::FireErrorEvent));
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Inline classic scripts ignore their CORS mode and are always CORS_NONE.
|
|
CORSMode corsMode = CORS_NONE;
|
|
if (aScriptKind == ScriptKind::eModule) {
|
|
corsMode = aElement->GetCORSMode();
|
|
}
|
|
// <https://html.spec.whatwg.org/multipage/scripting.html#prepare-the-script-element>
|
|
// step 29 specifies to use the fetch priority. Presumably it has no effect
|
|
// for inline scripts.
|
|
const auto fetchPriority = aElement->GetFetchPriority();
|
|
|
|
ReferrerPolicy referrerPolicy = GetReferrerPolicy(aElement);
|
|
ParserMetadata parserMetadata = GetParserMetadata(aElement);
|
|
|
|
RefPtr<ScriptLoadRequest> request =
|
|
CreateLoadRequest(aScriptKind, mDocument->GetDocumentURI(), aElement,
|
|
mDocument->NodePrincipal(), corsMode, nonce,
|
|
FetchPriorityToRequestPriority(fetchPriority),
|
|
SRIMetadata(), // SRI doesn't apply
|
|
referrerPolicy, parserMetadata);
|
|
request->GetScriptLoadContext()->mIsInline = true;
|
|
request->GetScriptLoadContext()->mLineNo = aElement->GetScriptLineNumber();
|
|
request->GetScriptLoadContext()->mColumnNo =
|
|
aElement->GetScriptColumnNumber();
|
|
request->mFetchSourceOnly = true;
|
|
request->SetTextSource();
|
|
TRACE_FOR_TEST_BOOL(request->GetScriptLoadContext()->GetScriptElement(),
|
|
"scriptloader_load_source");
|
|
CollectScriptTelemetry(request);
|
|
|
|
// Only the 'async' attribute is heeded on an inline module script and
|
|
// inline classic scripts ignore both these attributes.
|
|
MOZ_ASSERT(!aElement->GetScriptDeferred());
|
|
MOZ_ASSERT_IF(!request->IsModuleRequest(), !aElement->GetScriptAsync());
|
|
request->GetScriptLoadContext()->SetScriptMode(
|
|
false, aElement->GetScriptAsync(), false);
|
|
|
|
LOG(("ScriptLoadRequest (%p): Created request for inline script",
|
|
request.get()));
|
|
|
|
request->mBaseURL = mDocument->GetDocBaseURI();
|
|
|
|
if (request->IsModuleRequest()) {
|
|
// https://html.spec.whatwg.org/multipage/webappapis.html#fetch-an-inline-module-script-graph
|
|
// Step 1. Disallow further import maps given settings object.
|
|
mModuleLoader->DisallowImportMaps();
|
|
|
|
ModuleLoadRequest* modReq = request->AsModuleRequest();
|
|
if (aElement->GetParserCreated() != NOT_FROM_PARSER) {
|
|
if (aElement->GetScriptAsync()) {
|
|
AddAsyncRequest(modReq);
|
|
} else {
|
|
AddDeferRequest(modReq);
|
|
}
|
|
}
|
|
|
|
// This calls OnFetchComplete directly since there's no need to start
|
|
// fetching an inline script.
|
|
nsresult rv = modReq->OnFetchComplete(NS_OK);
|
|
if (NS_FAILED(rv)) {
|
|
ReportErrorToConsole(modReq, rv);
|
|
HandleLoadError(modReq, rv);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
if (request->IsImportMapRequest()) {
|
|
// https://html.spec.whatwg.org/multipage/scripting.html#prepare-the-script-element
|
|
// Step 31.2 type is "importmap":
|
|
// Impl note: Step 1 is done above before creating a ScriptLoadRequest.
|
|
MOZ_ASSERT(mModuleLoader->IsImportMapAllowed());
|
|
|
|
// Step 2. Set el's relevant global object's import maps allowed to false.
|
|
mModuleLoader->DisallowImportMaps();
|
|
|
|
// Step 3. Let result be the result of creating an import map parse result
|
|
// given source text and base URL.
|
|
UniquePtr<ImportMap> importMap = mModuleLoader->ParseImportMap(request);
|
|
if (!importMap) {
|
|
// If parsing import maps fails, the exception will be reported in
|
|
// ModuleLoaderBase::ParseImportMap, and the registration of the import
|
|
// map will bail out early.
|
|
return false;
|
|
}
|
|
|
|
// TODO: Bug 1781758: Move RegisterImportMap into EvaluateScriptElement.
|
|
//
|
|
// https://html.spec.whatwg.org/multipage/scripting.html#execute-the-script-element
|
|
// The spec defines 'register an import map' should be done in
|
|
// 'execute the script element', because inside 'execute the script element'
|
|
// it will perform a 'preparation-time document check'.
|
|
// However, as import maps could be only inline scripts by now, the
|
|
// 'preparation-time document check' will never fail for import maps.
|
|
// So we simply call 'register an import map' here.
|
|
mModuleLoader->RegisterImportMap(std::move(importMap));
|
|
return false;
|
|
}
|
|
|
|
request->mState = ScriptLoadRequest::State::Ready;
|
|
if (aElement->GetParserCreated() == FROM_PARSER_XSLT &&
|
|
(!ReadyToExecuteParserBlockingScripts() || !mXSLTRequests.isEmpty())) {
|
|
// Need to maintain order for XSLT-inserted scripts
|
|
NS_ASSERTION(!mParserBlockingRequest,
|
|
"Parser-blocking scripts and XSLT scripts in the same doc!");
|
|
mXSLTRequests.AppendElement(request);
|
|
return true;
|
|
}
|
|
if (aElement->GetParserCreated() == NOT_FROM_PARSER) {
|
|
NS_ASSERTION(
|
|
!nsContentUtils::IsSafeToRunScript(),
|
|
"A script-inserted script is inserted without an update batch?");
|
|
RunScriptWhenSafe(request);
|
|
return false;
|
|
}
|
|
if (aElement->GetParserCreated() == FROM_PARSER_NETWORK &&
|
|
!ReadyToExecuteParserBlockingScripts()) {
|
|
NS_ASSERTION(!mParserBlockingRequest,
|
|
"There can be only one parser-blocking script at a time");
|
|
mParserBlockingRequest = request;
|
|
NS_ASSERTION(mXSLTRequests.isEmpty(),
|
|
"Parser-blocking scripts and XSLT scripts in the same doc!");
|
|
return true;
|
|
}
|
|
// We now have a document.written inline script or we have an inline script
|
|
// from the network but there is no style sheet that is blocking scripts.
|
|
// Don't check for style sheets blocking scripts in the document.write
|
|
// case to avoid style sheet network activity affecting when
|
|
// document.write returns. It's not really necessary to do this if
|
|
// there's no document.write currently on the call stack. However,
|
|
// this way matches IE more closely than checking if document.write
|
|
// is on the call stack.
|
|
NS_ASSERTION(nsContentUtils::IsSafeToRunScript(),
|
|
"Not safe to run a parser-inserted script?");
|
|
return ProcessRequest(request) == NS_ERROR_HTMLPARSER_BLOCK;
|
|
}
|
|
|
|
ScriptLoadRequest* ScriptLoader::LookupPreloadRequest(
|
|
nsIScriptElement* aElement, ScriptKind aScriptKind,
|
|
const SRIMetadata& aSRIMetadata) {
|
|
MOZ_ASSERT(aElement);
|
|
|
|
nsTArray<PreloadInfo>::index_type i =
|
|
mPreloads.IndexOf(aElement->GetScriptURI(), 0, PreloadURIComparator());
|
|
if (i == nsTArray<PreloadInfo>::NoIndex) {
|
|
return nullptr;
|
|
}
|
|
RefPtr<ScriptLoadRequest> request = mPreloads[i].mRequest;
|
|
if (aScriptKind != request->mKind) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Found preloaded request. Note that a script-inserted script can steal a
|
|
// preload!
|
|
request->GetScriptLoadContext()->SetIsLoadRequest(aElement);
|
|
|
|
if (request->GetScriptLoadContext()->mWasCompiledOMT &&
|
|
!request->IsModuleRequest()) {
|
|
request->SetReady();
|
|
}
|
|
|
|
nsString preloadCharset(mPreloads[i].mCharset);
|
|
mPreloads.RemoveElementAt(i);
|
|
|
|
// Double-check that the charset the preload used is the same as the charset
|
|
// we have now.
|
|
nsAutoString elementCharset;
|
|
aElement->GetScriptCharset(elementCharset);
|
|
|
|
// Bug 1832361: charset and crossorigin attributes shouldn't affect matching
|
|
// of module scripts and modulepreload
|
|
if (!request->IsModuleRequest() &&
|
|
(!elementCharset.Equals(preloadCharset) ||
|
|
aElement->GetCORSMode() != request->CORSMode())) {
|
|
// Drop the preload.
|
|
request->Cancel();
|
|
AccumulateCategorical(LABELS_DOM_SCRIPT_PRELOAD_RESULT::RequestMismatch);
|
|
return nullptr;
|
|
}
|
|
|
|
if (!aSRIMetadata.CanTrustBeDelegatedTo(request->mIntegrity)) {
|
|
// Don't cancel link preload requests, we want to deliver onload according
|
|
// the result of the load, cancellation would unexpectedly lead to error
|
|
// notification.
|
|
if (!request->GetScriptLoadContext()->IsLinkPreloadScript()) {
|
|
request->Cancel();
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// Report any errors that we skipped while preloading.
|
|
ReportPreloadErrorsToConsole(request);
|
|
|
|
// This makes sure the pending preload (if exists) for this resource is
|
|
// properly marked as used and thus not notified in the console as unused.
|
|
request->GetScriptLoadContext()->NotifyUsage(mDocument);
|
|
// A used preload must no longer be found in the Document's hash table. Any
|
|
// <link preload> tag after the <script> tag will start a new request, that
|
|
// can be satisfied from a different cache, but not from the preload cache.
|
|
request->GetScriptLoadContext()->RemoveSelf(mDocument);
|
|
|
|
return request;
|
|
}
|
|
|
|
void ScriptLoader::GetSRIMetadata(const nsAString& aIntegrityAttr,
|
|
SRIMetadata* aMetadataOut) {
|
|
MOZ_ASSERT(aMetadataOut->IsEmpty());
|
|
|
|
if (aIntegrityAttr.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
MOZ_LOG(SRILogHelper::GetSriLog(), mozilla::LogLevel::Debug,
|
|
("ScriptLoader::GetSRIMetadata, integrity=%s",
|
|
NS_ConvertUTF16toUTF8(aIntegrityAttr).get()));
|
|
|
|
nsAutoCString sourceUri;
|
|
if (mDocument->GetDocumentURI()) {
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
SRICheck::IntegrityMetadata(aIntegrityAttr, sourceUri, mReporter,
|
|
aMetadataOut);
|
|
}
|
|
|
|
ReferrerPolicy ScriptLoader::GetReferrerPolicy(nsIScriptElement* aElement) {
|
|
ReferrerPolicy scriptReferrerPolicy = aElement->GetReferrerPolicy();
|
|
if (scriptReferrerPolicy != ReferrerPolicy::_empty) {
|
|
return scriptReferrerPolicy;
|
|
}
|
|
return mDocument->GetReferrerPolicy();
|
|
}
|
|
|
|
void ScriptLoader::CancelAndClearScriptLoadRequests() {
|
|
// Cancel all requests that have not been executed and remove them.
|
|
|
|
if (mParserBlockingRequest) {
|
|
mParserBlockingRequest->Cancel();
|
|
mParserBlockingRequest = nullptr;
|
|
}
|
|
|
|
mDeferRequests.CancelRequestsAndClear();
|
|
mLoadingAsyncRequests.CancelRequestsAndClear();
|
|
mLoadedAsyncRequests.CancelRequestsAndClear();
|
|
mNonAsyncExternalScriptInsertedRequests.CancelRequestsAndClear();
|
|
mXSLTRequests.CancelRequestsAndClear();
|
|
mOffThreadCompilingRequests.CancelRequestsAndClear();
|
|
|
|
if (mModuleLoader) {
|
|
mModuleLoader->CancelAndClearDynamicImports();
|
|
}
|
|
|
|
for (ModuleLoader* loader : mWebExtModuleLoaders) {
|
|
loader->CancelAndClearDynamicImports();
|
|
}
|
|
|
|
for (ModuleLoader* loader : mShadowRealmModuleLoaders) {
|
|
loader->CancelAndClearDynamicImports();
|
|
}
|
|
|
|
for (size_t i = 0; i < mPreloads.Length(); i++) {
|
|
mPreloads[i].mRequest->Cancel();
|
|
}
|
|
mPreloads.Clear();
|
|
}
|
|
|
|
nsresult ScriptLoader::CompileOffThreadOrProcessRequest(
|
|
ScriptLoadRequest* aRequest) {
|
|
NS_ASSERTION(nsContentUtils::IsSafeToRunScript(),
|
|
"Processing requests when running scripts is unsafe.");
|
|
|
|
if (!aRequest->GetScriptLoadContext()->mCompileOrDecodeTask &&
|
|
!aRequest->GetScriptLoadContext()->CompileStarted()) {
|
|
bool couldCompile = false;
|
|
nsresult rv = AttemptOffThreadScriptCompile(aRequest, &couldCompile);
|
|
if (NS_FAILED(rv)) {
|
|
HandleLoadError(aRequest, rv);
|
|
return rv;
|
|
}
|
|
|
|
if (couldCompile) {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
return ProcessRequest(aRequest);
|
|
}
|
|
|
|
namespace {
|
|
|
|
class OffThreadCompilationCompleteTask : public Task {
|
|
public:
|
|
OffThreadCompilationCompleteTask(ScriptLoadRequest* aRequest,
|
|
ScriptLoader* aLoader)
|
|
: Task(Kind::MainThreadOnly, EventQueuePriority::Normal),
|
|
mRequest(aRequest),
|
|
mLoader(aLoader) {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
}
|
|
|
|
void RecordStartTime() { mStartTime = TimeStamp::Now(); }
|
|
void RecordStopTime() { mStopTime = TimeStamp::Now(); }
|
|
|
|
#ifdef MOZ_COLLECTING_RUNNABLE_TELEMETRY
|
|
bool GetName(nsACString& aName) override {
|
|
aName.AssignLiteral("dom::OffThreadCompilationCompleteTask");
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
TaskResult Run() override {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
RefPtr<ScriptLoadContext> context = mRequest->GetScriptLoadContext();
|
|
|
|
if (!context->mCompileOrDecodeTask) {
|
|
// Request has been cancelled by MaybeCancelOffThreadScript.
|
|
return TaskResult::Complete;
|
|
}
|
|
|
|
RecordStopTime();
|
|
|
|
if (profiler_is_active()) {
|
|
ProfilerString8View scriptSourceString;
|
|
if (mRequest->IsTextSource()) {
|
|
scriptSourceString = "ScriptCompileOffThread";
|
|
} else {
|
|
MOZ_ASSERT(mRequest->IsBytecode());
|
|
scriptSourceString = "BytecodeDecodeOffThread";
|
|
}
|
|
|
|
nsAutoCString profilerLabelString;
|
|
mRequest->GetScriptLoadContext()->GetProfilerLabel(profilerLabelString);
|
|
PROFILER_MARKER_TEXT(scriptSourceString, JS,
|
|
MarkerTiming::Interval(mStartTime, mStopTime),
|
|
profilerLabelString);
|
|
}
|
|
|
|
(void)mLoader->ProcessOffThreadRequest(mRequest);
|
|
|
|
mRequest = nullptr;
|
|
mLoader = nullptr;
|
|
return TaskResult::Complete;
|
|
}
|
|
|
|
private:
|
|
// NOTE:
|
|
// These fields are main-thread only, and this task shouldn't be freed off
|
|
// main thread.
|
|
//
|
|
// This is guaranteed by not having off-thread tasks which depends on this
|
|
// task, because otherwise the off-thread task's mDependencies can be the
|
|
// last reference, which results in freeing this task off main thread.
|
|
//
|
|
// If such task is added, these fields must be moved to separate storage.
|
|
RefPtr<ScriptLoadRequest> mRequest;
|
|
RefPtr<ScriptLoader> mLoader;
|
|
|
|
TimeStamp mStartTime;
|
|
TimeStamp mStopTime;
|
|
};
|
|
|
|
} /* anonymous namespace */
|
|
|
|
nsresult ScriptLoader::AttemptOffThreadScriptCompile(
|
|
ScriptLoadRequest* aRequest, bool* aCouldCompileOut) {
|
|
// If speculative parsing is enabled, the request may not be ready to run if
|
|
// the element is not yet available.
|
|
MOZ_ASSERT_IF(!SpeculativeOMTParsingEnabled() && !aRequest->IsModuleRequest(),
|
|
aRequest->IsFinished());
|
|
MOZ_ASSERT(!aRequest->GetScriptLoadContext()->mWasCompiledOMT);
|
|
MOZ_ASSERT(aCouldCompileOut && !*aCouldCompileOut);
|
|
|
|
// Don't off-thread compile inline scripts.
|
|
if (aRequest->GetScriptLoadContext()->mIsInline) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsIGlobalObject> globalObject = GetGlobalForRequest(aRequest);
|
|
if (!globalObject) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
AutoJSAPI jsapi;
|
|
if (!jsapi.Init(globalObject)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JSContext* cx = jsapi.cx();
|
|
JS::CompileOptions options(cx);
|
|
|
|
// Introduction script will actually be computed and set when the script is
|
|
// collected from offthread
|
|
JS::Rooted<JSScript*> dummyIntroductionScript(cx);
|
|
nsresult rv = FillCompileOptionsForRequest(cx, aRequest, &options,
|
|
&dummyIntroductionScript);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
// TODO: This uses the same heuristics and the same threshold as the
|
|
// JS::CanCompileOffThread / JS::CanDecodeOffThread APIs, but the
|
|
// heuristics needs to be updated to reflect the change regarding the
|
|
// Stencil API, and also the thread management on the consumer side
|
|
// (bug 1846160).
|
|
static constexpr size_t OffThreadMinimumTextLength = 5 * 1000;
|
|
static constexpr size_t OffThreadMinimumBytecodeLength = 5 * 1000;
|
|
|
|
if (aRequest->IsTextSource()) {
|
|
if (!StaticPrefs::javascript_options_parallel_parsing() ||
|
|
aRequest->ScriptTextLength() < OffThreadMinimumTextLength) {
|
|
TRACE_FOR_TEST(aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
"scriptloader_main_thread_compile");
|
|
return NS_OK;
|
|
}
|
|
} else {
|
|
MOZ_ASSERT(aRequest->IsBytecode());
|
|
|
|
size_t length =
|
|
aRequest->mScriptBytecode.length() - aRequest->mBytecodeOffset;
|
|
if (!StaticPrefs::javascript_options_parallel_parsing() ||
|
|
length < OffThreadMinimumBytecodeLength) {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
RefPtr<CompileOrDecodeTask> compileOrDecodeTask;
|
|
rv = CreateOffThreadTask(cx, aRequest, options,
|
|
getter_AddRefs(compileOrDecodeTask));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
RefPtr<OffThreadCompilationCompleteTask> completeTask =
|
|
new OffThreadCompilationCompleteTask(aRequest, this);
|
|
|
|
completeTask->RecordStartTime();
|
|
|
|
aRequest->GetScriptLoadContext()->mCompileOrDecodeTask = compileOrDecodeTask;
|
|
completeTask->AddDependency(compileOrDecodeTask);
|
|
|
|
TaskController::Get()->AddTask(compileOrDecodeTask.forget());
|
|
TaskController::Get()->AddTask(completeTask.forget());
|
|
|
|
aRequest->GetScriptLoadContext()->BlockOnload(mDocument);
|
|
|
|
// Once the compilation is finished, the completeTask will be run on
|
|
// the main thread to call ScriptLoader::ProcessOffThreadRequest for the
|
|
// request.
|
|
aRequest->mState = ScriptLoadRequest::State::Compiling;
|
|
|
|
// Requests that are not tracked elsewhere are added to a list while they are
|
|
// being compiled off-thread, so we can cancel the compilation later if
|
|
// necessary.
|
|
//
|
|
// Non-top-level modules not tracked because these are cancelled from their
|
|
// importing module.
|
|
if (aRequest->IsTopLevel() && !aRequest->isInList()) {
|
|
mOffThreadCompilingRequests.AppendElement(aRequest);
|
|
aRequest->GetScriptLoadContext()->mInCompilingList = true;
|
|
}
|
|
|
|
*aCouldCompileOut = true;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
CompileOrDecodeTask::CompileOrDecodeTask()
|
|
: Task(Kind::OffMainThreadOnly, EventQueuePriority::Normal),
|
|
mMutex("CompileOrDecodeTask"),
|
|
mOptions(JS::OwningCompileOptions::ForFrontendContext()) {}
|
|
|
|
CompileOrDecodeTask::~CompileOrDecodeTask() {
|
|
if (mFrontendContext) {
|
|
JS::DestroyFrontendContext(mFrontendContext);
|
|
mFrontendContext = nullptr;
|
|
}
|
|
}
|
|
|
|
nsresult CompileOrDecodeTask::InitFrontendContext() {
|
|
mFrontendContext = JS::NewFrontendContext();
|
|
if (!mFrontendContext) {
|
|
mIsCancelled = true;
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
void CompileOrDecodeTask::DidRunTask(const MutexAutoLock& aProofOfLock,
|
|
RefPtr<JS::Stencil>&& aStencil) {
|
|
if (aStencil) {
|
|
if (!JS::PrepareForInstantiate(mFrontendContext, *aStencil,
|
|
mInstantiationStorage)) {
|
|
aStencil = nullptr;
|
|
}
|
|
}
|
|
|
|
mStencil = std::move(aStencil);
|
|
}
|
|
|
|
already_AddRefed<JS::Stencil> CompileOrDecodeTask::StealResult(
|
|
JSContext* aCx, JS::InstantiationStorage* aInstantiationStorage) {
|
|
JS::FrontendContext* fc = mFrontendContext;
|
|
mFrontendContext = nullptr;
|
|
auto destroyFrontendContext =
|
|
mozilla::MakeScopeExit([&]() { JS::DestroyFrontendContext(fc); });
|
|
|
|
MOZ_ASSERT(fc);
|
|
|
|
if (JS::HadFrontendErrors(fc)) {
|
|
(void)JS::ConvertFrontendErrorsToRuntimeErrors(aCx, fc, mOptions);
|
|
return nullptr;
|
|
}
|
|
|
|
if (!mStencil && JS::IsTranscodeFailureResult(mResult)) {
|
|
// Decode failure with bad content isn't reported as error.
|
|
JS_ReportErrorASCII(aCx, "failed to decode cache");
|
|
return nullptr;
|
|
}
|
|
|
|
// Report warnings.
|
|
if (!JS::ConvertFrontendErrorsToRuntimeErrors(aCx, fc, mOptions)) {
|
|
return nullptr;
|
|
}
|
|
|
|
MOZ_ASSERT(mStencil,
|
|
"If this task is cancelled, StealResult shouldn't be called");
|
|
|
|
// This task is started and finished successfully.
|
|
*aInstantiationStorage = std::move(mInstantiationStorage);
|
|
|
|
return mStencil.forget();
|
|
}
|
|
|
|
void CompileOrDecodeTask::Cancel() {
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
MutexAutoLock lock(mMutex);
|
|
|
|
mIsCancelled = true;
|
|
}
|
|
|
|
enum class CompilationTarget { Script, Module };
|
|
|
|
template <CompilationTarget target>
|
|
class ScriptOrModuleCompileTask final : public CompileOrDecodeTask {
|
|
public:
|
|
explicit ScriptOrModuleCompileTask(
|
|
ScriptLoader::MaybeSourceText&& aMaybeSource)
|
|
: CompileOrDecodeTask(), mMaybeSource(std::move(aMaybeSource)) {}
|
|
|
|
nsresult Init(JS::CompileOptions& aOptions) {
|
|
nsresult rv = InitFrontendContext();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (!mOptions.copy(mFrontendContext, aOptions)) {
|
|
mIsCancelled = true;
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
TaskResult Run() override {
|
|
MutexAutoLock lock(mMutex);
|
|
|
|
if (IsCancelled(lock)) {
|
|
return TaskResult::Complete;
|
|
}
|
|
|
|
RefPtr<JS::Stencil> stencil = Compile();
|
|
|
|
DidRunTask(lock, std::move(stencil));
|
|
return TaskResult::Complete;
|
|
}
|
|
|
|
private:
|
|
already_AddRefed<JS::Stencil> Compile() {
|
|
size_t stackSize = TaskController::GetThreadStackSize();
|
|
JS::SetNativeStackQuota(mFrontendContext,
|
|
JS::ThreadStackQuotaForSize(stackSize));
|
|
|
|
JS::CompilationStorage compileStorage;
|
|
auto compile = [&](auto& source) {
|
|
if constexpr (target == CompilationTarget::Script) {
|
|
return JS::CompileGlobalScriptToStencil(mFrontendContext, mOptions,
|
|
source, compileStorage);
|
|
}
|
|
return JS::CompileModuleScriptToStencil(mFrontendContext, mOptions,
|
|
source, compileStorage);
|
|
};
|
|
return mMaybeSource.mapNonEmpty(compile);
|
|
}
|
|
|
|
public:
|
|
#ifdef MOZ_COLLECTING_RUNNABLE_TELEMETRY
|
|
bool GetName(nsACString& aName) override {
|
|
if constexpr (target == CompilationTarget::Script) {
|
|
aName.AssignLiteral("ScriptCompileTask");
|
|
} else {
|
|
aName.AssignLiteral("ModuleCompileTask");
|
|
}
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
private:
|
|
ScriptLoader::MaybeSourceText mMaybeSource;
|
|
};
|
|
|
|
using ScriptCompileTask =
|
|
class ScriptOrModuleCompileTask<CompilationTarget::Script>;
|
|
using ModuleCompileTask =
|
|
class ScriptOrModuleCompileTask<CompilationTarget::Module>;
|
|
|
|
class ScriptDecodeTask final : public CompileOrDecodeTask {
|
|
public:
|
|
explicit ScriptDecodeTask(const JS::TranscodeRange& aRange)
|
|
: mRange(aRange) {}
|
|
|
|
nsresult Init(JS::DecodeOptions& aOptions) {
|
|
nsresult rv = InitFrontendContext();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (!mDecodeOptions.copy(mFrontendContext, aOptions)) {
|
|
mIsCancelled = true;
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
TaskResult Run() override {
|
|
MutexAutoLock lock(mMutex);
|
|
|
|
if (IsCancelled(lock)) {
|
|
return TaskResult::Complete;
|
|
}
|
|
|
|
RefPtr<JS::Stencil> stencil = Decode();
|
|
|
|
JS::OwningCompileOptions compileOptions(
|
|
(JS::OwningCompileOptions::ForFrontendContext()));
|
|
mOptions.steal(std::move(mDecodeOptions));
|
|
|
|
DidRunTask(lock, std::move(stencil));
|
|
return TaskResult::Complete;
|
|
}
|
|
|
|
private:
|
|
already_AddRefed<JS::Stencil> Decode() {
|
|
// NOTE: JS::DecodeStencil doesn't need the stack quota.
|
|
|
|
JS::CompilationStorage compileStorage;
|
|
RefPtr<JS::Stencil> stencil;
|
|
mResult = JS::DecodeStencil(mFrontendContext, mDecodeOptions, mRange,
|
|
getter_AddRefs(stencil));
|
|
return stencil.forget();
|
|
}
|
|
|
|
public:
|
|
#ifdef MOZ_COLLECTING_RUNNABLE_TELEMETRY
|
|
bool GetName(nsACString& aName) override {
|
|
aName.AssignLiteral("ScriptDecodeTask");
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
private:
|
|
JS::OwningDecodeOptions mDecodeOptions;
|
|
|
|
JS::TranscodeRange mRange;
|
|
};
|
|
|
|
nsresult ScriptLoader::CreateOffThreadTask(
|
|
JSContext* aCx, ScriptLoadRequest* aRequest, JS::CompileOptions& aOptions,
|
|
CompileOrDecodeTask** aCompileOrDecodeTask) {
|
|
if (aRequest->IsBytecode()) {
|
|
JS::DecodeOptions decodeOptions(aOptions);
|
|
JS::TranscodeRange range(
|
|
aRequest->mScriptBytecode.begin() + aRequest->mBytecodeOffset,
|
|
aRequest->mScriptBytecode.length() - aRequest->mBytecodeOffset);
|
|
RefPtr<ScriptDecodeTask> decodeTask = new ScriptDecodeTask(range);
|
|
nsresult rv = decodeTask->Init(decodeOptions);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
decodeTask.forget(aCompileOrDecodeTask);
|
|
return NS_OK;
|
|
}
|
|
|
|
MaybeSourceText maybeSource;
|
|
nsresult rv = aRequest->GetScriptSource(aCx, &maybeSource);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (ShouldApplyDelazifyStrategy(aRequest)) {
|
|
ApplyDelazifyStrategy(&aOptions);
|
|
mTotalFullParseSize +=
|
|
aRequest->ScriptTextLength() > 0
|
|
? static_cast<uint32_t>(aRequest->ScriptTextLength())
|
|
: 0;
|
|
|
|
LOG(
|
|
("ScriptLoadRequest (%p): non-on-demand-only Parsing Enabled for "
|
|
"url=%s mTotalFullParseSize=%u",
|
|
aRequest, aRequest->mURI->GetSpecOrDefault().get(),
|
|
mTotalFullParseSize));
|
|
}
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
RefPtr<ModuleCompileTask> compileTask =
|
|
new ModuleCompileTask(std::move(maybeSource));
|
|
rv = compileTask->Init(aOptions);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
compileTask.forget(aCompileOrDecodeTask);
|
|
return NS_OK;
|
|
}
|
|
|
|
if (StaticPrefs::dom_expose_test_interfaces()) {
|
|
switch (aOptions.eagerDelazificationStrategy()) {
|
|
case JS::DelazificationOption::OnDemandOnly:
|
|
TRACE_FOR_TEST(aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
"delazification_on_demand_only");
|
|
break;
|
|
case JS::DelazificationOption::CheckConcurrentWithOnDemand:
|
|
case JS::DelazificationOption::ConcurrentDepthFirst:
|
|
TRACE_FOR_TEST(aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
"delazification_concurrent_depth_first");
|
|
break;
|
|
case JS::DelazificationOption::ConcurrentLargeFirst:
|
|
TRACE_FOR_TEST(aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
"delazification_concurrent_large_first");
|
|
break;
|
|
case JS::DelazificationOption::ParseEverythingEagerly:
|
|
TRACE_FOR_TEST(aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
"delazification_parse_everything_eagerly");
|
|
break;
|
|
}
|
|
}
|
|
|
|
RefPtr<ScriptCompileTask> compileTask =
|
|
new ScriptCompileTask(std::move(maybeSource));
|
|
rv = compileTask->Init(aOptions);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
compileTask.forget(aCompileOrDecodeTask);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult ScriptLoader::ProcessOffThreadRequest(ScriptLoadRequest* aRequest) {
|
|
MOZ_ASSERT(aRequest->IsCompiling());
|
|
MOZ_ASSERT(!aRequest->GetScriptLoadContext()->mWasCompiledOMT);
|
|
|
|
if (aRequest->IsCanceled()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
aRequest->GetScriptLoadContext()->mWasCompiledOMT = true;
|
|
|
|
if (aRequest->GetScriptLoadContext()->mInCompilingList) {
|
|
mOffThreadCompilingRequests.Remove(aRequest);
|
|
aRequest->GetScriptLoadContext()->mInCompilingList = false;
|
|
}
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
MOZ_ASSERT(aRequest->GetScriptLoadContext()->mCompileOrDecodeTask);
|
|
ModuleLoadRequest* request = aRequest->AsModuleRequest();
|
|
return request->OnFetchComplete(NS_OK);
|
|
}
|
|
|
|
// Element may not be ready yet if speculatively compiling, so process the
|
|
// request in ProcessPendingRequests when it is available.
|
|
MOZ_ASSERT_IF(!SpeculativeOMTParsingEnabled(),
|
|
aRequest->GetScriptLoadContext()->GetScriptElement());
|
|
if (!aRequest->GetScriptLoadContext()->GetScriptElement()) {
|
|
// Unblock onload here in case this request never gets executed.
|
|
aRequest->GetScriptLoadContext()->MaybeUnblockOnload();
|
|
return NS_OK;
|
|
}
|
|
|
|
aRequest->SetReady();
|
|
|
|
if (aRequest == mParserBlockingRequest) {
|
|
if (!ReadyToExecuteParserBlockingScripts()) {
|
|
// If not ready to execute scripts, schedule an async call to
|
|
// ProcessPendingRequests to handle it.
|
|
ProcessPendingRequestsAsync();
|
|
return NS_OK;
|
|
}
|
|
|
|
// Same logic as in top of ProcessPendingRequests.
|
|
mParserBlockingRequest = nullptr;
|
|
UnblockParser(aRequest);
|
|
ProcessRequest(aRequest);
|
|
ContinueParserAsync(aRequest);
|
|
return NS_OK;
|
|
}
|
|
|
|
// Async scripts and blocking scripts can be executed right away.
|
|
if ((aRequest->GetScriptLoadContext()->IsAsyncScript() ||
|
|
aRequest->GetScriptLoadContext()->IsBlockingScript()) &&
|
|
!aRequest->isInList()) {
|
|
return ProcessRequest(aRequest);
|
|
}
|
|
|
|
// Process other scripts in the proper order.
|
|
ProcessPendingRequests();
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult ScriptLoader::ProcessRequest(ScriptLoadRequest* aRequest) {
|
|
LOG(("ScriptLoadRequest (%p): Process request", aRequest));
|
|
|
|
NS_ASSERTION(nsContentUtils::IsSafeToRunScript(),
|
|
"Processing requests when running scripts is unsafe.");
|
|
NS_ASSERTION(aRequest->IsFinished(),
|
|
"Processing a request that is not ready to run.");
|
|
|
|
NS_ENSURE_ARG(aRequest);
|
|
|
|
auto unblockOnload = MakeScopeExit(
|
|
[&] { aRequest->GetScriptLoadContext()->MaybeUnblockOnload(); });
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
ModuleLoadRequest* request = aRequest->AsModuleRequest();
|
|
if (request->IsDynamicImport()) {
|
|
request->ProcessDynamicImport();
|
|
return NS_OK;
|
|
}
|
|
|
|
if (request->mModuleScript) {
|
|
if (!request->InstantiateModuleGraph()) {
|
|
request->mModuleScript = nullptr;
|
|
}
|
|
}
|
|
|
|
if (!request->mModuleScript) {
|
|
// There was an error fetching a module script. Nothing to do here.
|
|
LOG(("ScriptLoadRequest (%p): Error loading request, firing error",
|
|
aRequest));
|
|
FireScriptAvailable(NS_ERROR_FAILURE, aRequest);
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsINode> scriptElem =
|
|
do_QueryInterface(aRequest->GetScriptLoadContext()->GetScriptElement());
|
|
|
|
nsCOMPtr<Document> doc;
|
|
if (!aRequest->GetScriptLoadContext()->mIsInline ||
|
|
aRequest->IsModuleRequest()) {
|
|
doc = scriptElem->OwnerDoc();
|
|
}
|
|
|
|
nsCOMPtr<nsIScriptElement> oldParserInsertedScript;
|
|
uint32_t parserCreated = aRequest->GetScriptLoadContext()->GetParserCreated();
|
|
if (parserCreated) {
|
|
oldParserInsertedScript = mCurrentParserInsertedScript;
|
|
mCurrentParserInsertedScript =
|
|
aRequest->GetScriptLoadContext()->GetScriptElement();
|
|
}
|
|
|
|
aRequest->GetScriptLoadContext()->GetScriptElement()->BeginEvaluating();
|
|
|
|
FireScriptAvailable(NS_OK, aRequest);
|
|
|
|
// The window may have gone away by this point, in which case there's no point
|
|
// in trying to run the script.
|
|
|
|
{
|
|
// Try to perform a microtask checkpoint
|
|
nsAutoMicroTask mt;
|
|
}
|
|
|
|
nsPIDOMWindowInner* pwin = mDocument->GetInnerWindow();
|
|
bool runScript = !!pwin;
|
|
if (runScript) {
|
|
nsContentUtils::DispatchTrustedEvent(
|
|
scriptElem->OwnerDoc(), scriptElem, u"beforescriptexecute"_ns,
|
|
CanBubble::eYes, Cancelable::eYes, &runScript);
|
|
}
|
|
|
|
// Inner window could have gone away after firing beforescriptexecute
|
|
pwin = mDocument->GetInnerWindow();
|
|
if (!pwin) {
|
|
runScript = false;
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
if (runScript) {
|
|
if (doc) {
|
|
doc->IncrementIgnoreDestructiveWritesCounter();
|
|
}
|
|
rv = EvaluateScriptElement(aRequest);
|
|
if (doc) {
|
|
doc->DecrementIgnoreDestructiveWritesCounter();
|
|
}
|
|
|
|
nsContentUtils::DispatchTrustedEvent(scriptElem->OwnerDoc(), scriptElem,
|
|
u"afterscriptexecute"_ns,
|
|
CanBubble::eYes, Cancelable::eNo);
|
|
}
|
|
|
|
FireScriptEvaluated(rv, aRequest);
|
|
|
|
aRequest->GetScriptLoadContext()->GetScriptElement()->EndEvaluating();
|
|
|
|
if (parserCreated) {
|
|
mCurrentParserInsertedScript = oldParserInsertedScript;
|
|
}
|
|
|
|
if (aRequest->GetScriptLoadContext()->mCompileOrDecodeTask) {
|
|
// The request was parsed off-main-thread, but the result of the off
|
|
// thread parse was not actually needed to process the request
|
|
// (disappearing window, some other error, ...). Finish the
|
|
// request to avoid leaks.
|
|
MOZ_ASSERT(!aRequest->IsModuleRequest());
|
|
aRequest->GetScriptLoadContext()->MaybeCancelOffThreadScript();
|
|
}
|
|
|
|
// Free any source data, but keep the bytecode content as we might have to
|
|
// save it later.
|
|
aRequest->ClearScriptSource();
|
|
if (aRequest->IsBytecode()) {
|
|
// We received bytecode as input, thus we were decoding, and we will not be
|
|
// encoding the bytecode once more. We can safely clear the content of this
|
|
// buffer.
|
|
aRequest->mScriptBytecode.clearAndFree();
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
void ScriptLoader::FireScriptAvailable(nsresult aResult,
|
|
ScriptLoadRequest* aRequest) {
|
|
for (int32_t i = 0; i < mObservers.Count(); i++) {
|
|
nsCOMPtr<nsIScriptLoaderObserver> obs = mObservers[i];
|
|
obs->ScriptAvailable(
|
|
aResult, aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
aRequest->GetScriptLoadContext()->mIsInline, aRequest->mURI,
|
|
aRequest->GetScriptLoadContext()->mLineNo);
|
|
}
|
|
|
|
bool isInlineClassicScript = aRequest->GetScriptLoadContext()->mIsInline &&
|
|
!aRequest->IsModuleRequest();
|
|
RefPtr<nsIScriptElement> scriptElement =
|
|
aRequest->GetScriptLoadContext()->GetScriptElement();
|
|
scriptElement->ScriptAvailable(aResult, scriptElement, isInlineClassicScript,
|
|
aRequest->mURI,
|
|
aRequest->GetScriptLoadContext()->mLineNo);
|
|
}
|
|
|
|
// TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230)
|
|
MOZ_CAN_RUN_SCRIPT_BOUNDARY void ScriptLoader::FireScriptEvaluated(
|
|
nsresult aResult, ScriptLoadRequest* aRequest) {
|
|
for (int32_t i = 0; i < mObservers.Count(); i++) {
|
|
nsCOMPtr<nsIScriptLoaderObserver> obs = mObservers[i];
|
|
RefPtr<nsIScriptElement> scriptElement =
|
|
aRequest->GetScriptLoadContext()->GetScriptElement();
|
|
obs->ScriptEvaluated(aResult, scriptElement,
|
|
aRequest->GetScriptLoadContext()->mIsInline);
|
|
}
|
|
|
|
RefPtr<nsIScriptElement> scriptElement =
|
|
aRequest->GetScriptLoadContext()->GetScriptElement();
|
|
scriptElement->ScriptEvaluated(aResult, scriptElement,
|
|
aRequest->GetScriptLoadContext()->mIsInline);
|
|
}
|
|
|
|
already_AddRefed<nsIGlobalObject> ScriptLoader::GetGlobalForRequest(
|
|
ScriptLoadRequest* aRequest) {
|
|
if (aRequest->IsModuleRequest()) {
|
|
ModuleLoader* loader =
|
|
ModuleLoader::From(aRequest->AsModuleRequest()->mLoader);
|
|
nsCOMPtr<nsIGlobalObject> global = loader->GetGlobalObject();
|
|
return global.forget();
|
|
}
|
|
|
|
return GetScriptGlobalObject();
|
|
}
|
|
|
|
already_AddRefed<nsIScriptGlobalObject> ScriptLoader::GetScriptGlobalObject() {
|
|
if (!mDocument) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsPIDOMWindowInner* pwin = mDocument->GetInnerWindow();
|
|
if (!pwin) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsCOMPtr<nsIScriptGlobalObject> globalObject = do_QueryInterface(pwin);
|
|
NS_ASSERTION(globalObject, "windows must be global objects");
|
|
|
|
// and make sure we are setup for this type of script.
|
|
nsresult rv = globalObject->EnsureScriptEnvironment();
|
|
if (NS_FAILED(rv)) {
|
|
return nullptr;
|
|
}
|
|
|
|
return globalObject.forget();
|
|
}
|
|
|
|
nsresult ScriptLoader::FillCompileOptionsForRequest(
|
|
JSContext* aCx, ScriptLoadRequest* aRequest, JS::CompileOptions* aOptions,
|
|
JS::MutableHandle<JSScript*> aIntroductionScript) {
|
|
// It's very important to use aRequest->mURI, not the final URI of the channel
|
|
// aRequest ended up getting script data from, as the script filename.
|
|
nsresult rv = aRequest->mURI->GetSpec(aRequest->mURL);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
if (mDocument) {
|
|
mDocument->NoteScriptTrackingStatus(
|
|
aRequest->mURL, aRequest->GetScriptLoadContext()->IsTracking());
|
|
}
|
|
|
|
const char* introductionType;
|
|
if (aRequest->IsModuleRequest() &&
|
|
!aRequest->AsModuleRequest()->IsTopLevel()) {
|
|
introductionType = "importedModule";
|
|
} else if (!aRequest->GetScriptLoadContext()->mIsInline) {
|
|
introductionType = "srcScript";
|
|
} else if (aRequest->GetScriptLoadContext()->GetParserCreated() ==
|
|
FROM_PARSER_NETWORK) {
|
|
introductionType = "inlineScript";
|
|
} else {
|
|
introductionType = "injectedScript";
|
|
}
|
|
aOptions->setIntroductionInfoToCaller(aCx, introductionType,
|
|
aIntroductionScript);
|
|
aOptions->setFileAndLine(aRequest->mURL.get(),
|
|
aRequest->GetScriptLoadContext()->mLineNo);
|
|
// The column is only relevant for inline scripts in order for SpiderMonkey to
|
|
// properly compute offsets relatively to the script position within the HTML
|
|
// file. injectedScript are not concerned and are always considered to start
|
|
// at column 0.
|
|
if (aRequest->GetScriptLoadContext()->mIsInline &&
|
|
aRequest->GetScriptLoadContext()->GetParserCreated() ==
|
|
FROM_PARSER_NETWORK) {
|
|
aOptions->setColumn(JS::ColumnNumberOneOrigin::fromZeroOrigin(
|
|
aRequest->GetScriptLoadContext()->mColumnNo));
|
|
}
|
|
aOptions->setIsRunOnce(true);
|
|
aOptions->setNoScriptRval(true);
|
|
if (aRequest->mSourceMapURL) {
|
|
aOptions->setSourceMapURL(aRequest->mSourceMapURL->get());
|
|
}
|
|
if (aRequest->mOriginPrincipal) {
|
|
nsCOMPtr<nsIGlobalObject> globalObject = GetGlobalForRequest(aRequest);
|
|
nsIPrincipal* scriptPrin = globalObject->PrincipalOrNull();
|
|
MOZ_ASSERT(scriptPrin);
|
|
bool subsumes = scriptPrin->Subsumes(aRequest->mOriginPrincipal);
|
|
aOptions->setMutedErrors(!subsumes);
|
|
}
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
aOptions->setHideScriptFromDebugger(true);
|
|
}
|
|
|
|
aOptions->setDeferDebugMetadata(true);
|
|
|
|
aOptions->borrowBuffer = true;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/* static */
|
|
bool ScriptLoader::ShouldCacheBytecode(ScriptLoadRequest* aRequest) {
|
|
using mozilla::TimeDuration;
|
|
using mozilla::TimeStamp;
|
|
|
|
// We need the nsICacheInfoChannel to exist to be able to open the alternate
|
|
// data output stream. This pointer would only be non-null if the bytecode was
|
|
// activated at the time the channel got created in StartLoad.
|
|
if (!aRequest->mCacheInfo) {
|
|
LOG(("ScriptLoadRequest (%p): Cannot cache anything (cacheInfo = %p)",
|
|
aRequest, aRequest->mCacheInfo.get()));
|
|
return false;
|
|
}
|
|
|
|
// Look at the preference to know which strategy (parameters) should be used
|
|
// when the bytecode cache is enabled.
|
|
int32_t strategy = StaticPrefs::dom_script_loader_bytecode_cache_strategy();
|
|
|
|
// List of parameters used by the strategies.
|
|
bool hasSourceLengthMin = false;
|
|
bool hasFetchCountMin = false;
|
|
size_t sourceLengthMin = 100;
|
|
uint32_t fetchCountMin = 4;
|
|
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: strategy = %d.", aRequest,
|
|
strategy));
|
|
switch (strategy) {
|
|
case -2: {
|
|
// Reader mode, keep requesting alternate data but no longer save it.
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: Encoding disabled.",
|
|
aRequest));
|
|
return false;
|
|
}
|
|
case -1: {
|
|
// Eager mode, skip heuristics!
|
|
hasSourceLengthMin = false;
|
|
hasFetchCountMin = false;
|
|
break;
|
|
}
|
|
default:
|
|
case 0: {
|
|
hasSourceLengthMin = true;
|
|
hasFetchCountMin = true;
|
|
sourceLengthMin = 1024;
|
|
// If we were to optimize only for speed, without considering the impact
|
|
// on memory, we should set this threshold to 2. (Bug 900784 comment 120)
|
|
fetchCountMin = 4;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// If the script is too small/large, do not attempt at creating a bytecode
|
|
// cache for this script, as the overhead of parsing it might not be worth the
|
|
// effort.
|
|
if (hasSourceLengthMin) {
|
|
size_t sourceLength;
|
|
size_t minLength;
|
|
MOZ_ASSERT(aRequest->IsTextSource());
|
|
sourceLength = aRequest->mScriptTextLength;
|
|
minLength = sourceLengthMin;
|
|
if (sourceLength < minLength) {
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: Script is too small.",
|
|
aRequest));
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Check that we loaded the cache entry a few times before attempting any
|
|
// bytecode-cache optimization, such that we do not waste time on entry which
|
|
// are going to be dropped soon.
|
|
if (hasFetchCountMin) {
|
|
uint32_t fetchCount = 0;
|
|
if (NS_FAILED(aRequest->mCacheInfo->GetCacheTokenFetchCount(&fetchCount))) {
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: Cannot get fetchCount.",
|
|
aRequest));
|
|
return false;
|
|
}
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: fetchCount = %d.", aRequest,
|
|
fetchCount));
|
|
if (fetchCount < fetchCountMin) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: Trigger encoding.", aRequest));
|
|
return true;
|
|
}
|
|
|
|
class MOZ_RAII AutoSetProcessingScriptTag {
|
|
nsCOMPtr<nsIScriptContext> mContext;
|
|
bool mOldTag;
|
|
|
|
public:
|
|
explicit AutoSetProcessingScriptTag(nsIScriptContext* aContext)
|
|
: mContext(aContext), mOldTag(mContext->GetProcessingScriptTag()) {
|
|
mContext->SetProcessingScriptTag(true);
|
|
}
|
|
|
|
~AutoSetProcessingScriptTag() { mContext->SetProcessingScriptTag(mOldTag); }
|
|
};
|
|
|
|
static nsresult ExecuteCompiledScript(JSContext* aCx, JSExecutionContext& aExec,
|
|
ClassicScript* aLoaderScript) {
|
|
JS::Rooted<JSScript*> script(aCx, aExec.GetScript());
|
|
if (!script) {
|
|
// Compilation succeeds without producing a script if scripting is
|
|
// disabled for the global.
|
|
return NS_OK;
|
|
}
|
|
|
|
if (JS::GetScriptPrivate(script).isUndefined()) {
|
|
aLoaderScript->AssociateWithScript(script);
|
|
}
|
|
|
|
return aExec.ExecScript();
|
|
}
|
|
|
|
nsresult ScriptLoader::EvaluateScriptElement(ScriptLoadRequest* aRequest) {
|
|
using namespace mozilla::Telemetry;
|
|
MOZ_ASSERT(aRequest->IsFinished());
|
|
|
|
// We need a document to evaluate scripts.
|
|
if (!mDocument) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> scriptContent(
|
|
do_QueryInterface(aRequest->GetScriptLoadContext()->GetScriptElement()));
|
|
MOZ_ASSERT(scriptContent);
|
|
Document* ownerDoc = scriptContent->OwnerDoc();
|
|
if (ownerDoc != mDocument) {
|
|
// Willful violation of HTML5 as of 2010-12-01
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsCOMPtr<nsIGlobalObject> globalObject;
|
|
nsCOMPtr<nsIScriptContext> context;
|
|
if (!IsWebExtensionRequest(aRequest)) {
|
|
// Otherwise we have to ensure that there is a nsIScriptContext.
|
|
nsCOMPtr<nsIScriptGlobalObject> scriptGlobal = GetScriptGlobalObject();
|
|
if (!scriptGlobal) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
MOZ_ASSERT_IF(
|
|
aRequest->IsModuleRequest(),
|
|
aRequest->AsModuleRequest()->GetGlobalObject() == scriptGlobal);
|
|
|
|
// Make sure context is a strong reference since we access it after
|
|
// we've executed a script, which may cause all other references to
|
|
// the context to go away.
|
|
context = scriptGlobal->GetScriptContext();
|
|
if (!context) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
globalObject = scriptGlobal;
|
|
}
|
|
|
|
// Update our current script.
|
|
// This must be destroyed after destroying nsAutoMicroTask, see:
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=1620505#c4
|
|
nsIScriptElement* currentScript =
|
|
aRequest->IsModuleRequest()
|
|
? nullptr
|
|
: aRequest->GetScriptLoadContext()->GetScriptElement();
|
|
AutoCurrentScriptUpdater scriptUpdater(this, currentScript);
|
|
|
|
Maybe<AutoSetProcessingScriptTag> setProcessingScriptTag;
|
|
if (context) {
|
|
setProcessingScriptTag.emplace(context);
|
|
}
|
|
|
|
// https://wicg.github.io/import-maps/#integration-script-type
|
|
// Switch on the script's type for scriptElement:
|
|
// "importmap"
|
|
// Assert: Never reached.
|
|
MOZ_ASSERT(!aRequest->IsImportMapRequest());
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
return aRequest->AsModuleRequest()->EvaluateModule();
|
|
}
|
|
|
|
return EvaluateScript(globalObject, aRequest);
|
|
}
|
|
|
|
nsresult ScriptLoader::CompileOrDecodeClassicScript(
|
|
JSContext* aCx, JSExecutionContext& aExec, ScriptLoadRequest* aRequest) {
|
|
nsAutoCString profilerLabelString;
|
|
aRequest->GetScriptLoadContext()->GetProfilerLabel(profilerLabelString);
|
|
|
|
nsresult rv;
|
|
if (aRequest->IsBytecode()) {
|
|
if (aRequest->GetScriptLoadContext()->mCompileOrDecodeTask) {
|
|
LOG(("ScriptLoadRequest (%p): Decode Bytecode & instantiate and Execute",
|
|
aRequest));
|
|
rv = aExec.JoinOffThread(aRequest->GetScriptLoadContext());
|
|
} else {
|
|
LOG(("ScriptLoadRequest (%p): Decode Bytecode and Execute", aRequest));
|
|
AUTO_PROFILER_MARKER_TEXT("BytecodeDecodeMainThread", JS,
|
|
MarkerInnerWindowIdFromJSContext(aCx),
|
|
profilerLabelString);
|
|
|
|
rv = aExec.Decode(aRequest->mScriptBytecode, aRequest->mBytecodeOffset);
|
|
}
|
|
|
|
// We do not expect to be saving anything when we already have some
|
|
// bytecode.
|
|
MOZ_ASSERT(!aRequest->mCacheInfo);
|
|
return rv;
|
|
}
|
|
|
|
MOZ_ASSERT(aRequest->IsSource());
|
|
bool encodeBytecode = ShouldCacheBytecode(aRequest);
|
|
aExec.SetEncodeBytecode(encodeBytecode);
|
|
|
|
if (aRequest->GetScriptLoadContext()->mCompileOrDecodeTask) {
|
|
// Off-main-thread parsing.
|
|
LOG(
|
|
("ScriptLoadRequest (%p): instantiate off-thread result and "
|
|
"Execute",
|
|
aRequest));
|
|
MOZ_ASSERT(aRequest->IsTextSource());
|
|
rv = aExec.JoinOffThread(aRequest->GetScriptLoadContext());
|
|
} else {
|
|
// Main thread parsing (inline and small scripts)
|
|
LOG(("ScriptLoadRequest (%p): Compile And Exec", aRequest));
|
|
MOZ_ASSERT(aRequest->IsTextSource());
|
|
MaybeSourceText maybeSource;
|
|
rv = aRequest->GetScriptSource(aCx, &maybeSource);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
AUTO_PROFILER_MARKER_TEXT("ScriptCompileMainThread", JS,
|
|
MarkerInnerWindowIdFromJSContext(aCx),
|
|
profilerLabelString);
|
|
|
|
auto compile = [&](auto& source) { return aExec.Compile(source); };
|
|
|
|
MOZ_ASSERT(!maybeSource.empty());
|
|
TimeStamp startTime = TimeStamp::Now();
|
|
rv = maybeSource.mapNonEmpty(compile);
|
|
mMainThreadParseTime += TimeStamp::Now() - startTime;
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
/* static */
|
|
nsCString& ScriptLoader::BytecodeMimeTypeFor(ScriptLoadRequest* aRequest) {
|
|
if (aRequest->IsModuleRequest()) {
|
|
return nsContentUtils::JSModuleBytecodeMimeType();
|
|
}
|
|
return nsContentUtils::JSScriptBytecodeMimeType();
|
|
}
|
|
|
|
void ScriptLoader::MaybePrepareForBytecodeEncodingBeforeExecute(
|
|
ScriptLoadRequest* aRequest, JS::Handle<JSScript*> aScript) {
|
|
if (!ShouldCacheBytecode(aRequest)) {
|
|
return;
|
|
}
|
|
|
|
aRequest->MarkForBytecodeEncoding(aScript);
|
|
}
|
|
|
|
nsresult ScriptLoader::MaybePrepareForBytecodeEncodingAfterExecute(
|
|
ScriptLoadRequest* aRequest, nsresult aRv) {
|
|
if (aRequest->IsMarkedForBytecodeEncoding()) {
|
|
TRACE_FOR_TEST(aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
"scriptloader_encode");
|
|
// NOTE: This assertion will fail once we start encoding more data after the
|
|
// first encode.
|
|
MOZ_ASSERT(aRequest->mBytecodeOffset == aRequest->mScriptBytecode.length());
|
|
RegisterForBytecodeEncoding(aRequest);
|
|
MOZ_ASSERT(IsAlreadyHandledForBytecodeEncodingPreparation(aRequest));
|
|
|
|
return aRv;
|
|
}
|
|
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: disabled (rv = %X)", aRequest,
|
|
unsigned(aRv)));
|
|
TRACE_FOR_TEST_NONE(aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
"scriptloader_no_encode");
|
|
aRequest->mCacheInfo = nullptr;
|
|
MOZ_ASSERT(IsAlreadyHandledForBytecodeEncodingPreparation(aRequest));
|
|
|
|
return aRv;
|
|
}
|
|
|
|
bool ScriptLoader::IsAlreadyHandledForBytecodeEncodingPreparation(
|
|
ScriptLoadRequest* aRequest) {
|
|
return aRequest->isInList() || !aRequest->mCacheInfo;
|
|
}
|
|
|
|
void ScriptLoader::MaybePrepareModuleForBytecodeEncodingBeforeExecute(
|
|
JSContext* aCx, ModuleLoadRequest* aRequest) {
|
|
{
|
|
ModuleScript* moduleScript = aRequest->mModuleScript;
|
|
JS::Rooted<JSObject*> module(aCx, moduleScript->ModuleRecord());
|
|
|
|
if (aRequest->IsMarkedForBytecodeEncoding()) {
|
|
// This module is imported multiple times, and already marked.
|
|
return;
|
|
}
|
|
|
|
if (ShouldCacheBytecode(aRequest)) {
|
|
aRequest->MarkModuleForBytecodeEncoding();
|
|
}
|
|
}
|
|
|
|
for (ModuleLoadRequest* childRequest : aRequest->mImports) {
|
|
MaybePrepareModuleForBytecodeEncodingBeforeExecute(aCx, childRequest);
|
|
}
|
|
}
|
|
|
|
nsresult ScriptLoader::MaybePrepareModuleForBytecodeEncodingAfterExecute(
|
|
ModuleLoadRequest* aRequest, nsresult aRv) {
|
|
if (IsAlreadyHandledForBytecodeEncodingPreparation(aRequest)) {
|
|
// This module is imported multiple times and already handled.
|
|
return aRv;
|
|
}
|
|
|
|
aRv = MaybePrepareForBytecodeEncodingAfterExecute(aRequest, aRv);
|
|
|
|
for (ModuleLoadRequest* childRequest : aRequest->mImports) {
|
|
aRv = MaybePrepareModuleForBytecodeEncodingAfterExecute(childRequest, aRv);
|
|
}
|
|
|
|
return aRv;
|
|
}
|
|
|
|
nsresult ScriptLoader::EvaluateScript(nsIGlobalObject* aGlobalObject,
|
|
ScriptLoadRequest* aRequest) {
|
|
nsAutoMicroTask mt;
|
|
AutoEntryScript aes(aGlobalObject, "EvaluateScript", true);
|
|
JSContext* cx = aes.cx();
|
|
|
|
nsAutoCString profilerLabelString;
|
|
aRequest->GetScriptLoadContext()->GetProfilerLabel(profilerLabelString);
|
|
|
|
// Create a ClassicScript object and associate it with the JSScript.
|
|
RefPtr<ClassicScript> classicScript = new ClassicScript(
|
|
aRequest->ReferrerPolicy(), aRequest->mFetchOptions, aRequest->mBaseURL);
|
|
JS::Rooted<JS::Value> classicScriptValue(cx, JS::PrivateValue(classicScript));
|
|
|
|
JS::CompileOptions options(cx);
|
|
JS::Rooted<JSScript*> introductionScript(cx);
|
|
nsresult rv =
|
|
FillCompileOptionsForRequest(cx, aRequest, &options, &introductionScript);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
TRACE_FOR_TEST(aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
"scriptloader_execute");
|
|
JS::Rooted<JSObject*> global(cx, aGlobalObject->GetGlobalJSObject());
|
|
JSExecutionContext exec(cx, global, options, classicScriptValue,
|
|
introductionScript);
|
|
|
|
rv = CompileOrDecodeClassicScript(cx, exec, aRequest);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// TODO (yulia): rewrite this section. rv can be a failing pattern other than
|
|
// NS_OK which will pass the NS_FAILED check above. If we call exec.GetScript
|
|
// in that case, it will crash.
|
|
if (rv == NS_OK) {
|
|
JS::Rooted<JSScript*> script(cx, exec.GetScript());
|
|
MaybePrepareForBytecodeEncodingBeforeExecute(aRequest, script);
|
|
|
|
{
|
|
LOG(("ScriptLoadRequest (%p): Evaluate Script", aRequest));
|
|
AUTO_PROFILER_MARKER_TEXT("ScriptExecution", JS,
|
|
MarkerInnerWindowIdFromJSContext(cx),
|
|
profilerLabelString);
|
|
|
|
rv = ExecuteCompiledScript(cx, exec, classicScript);
|
|
}
|
|
}
|
|
|
|
// This must be called also for compilation failure case, in order to
|
|
// dispatch test-only event.
|
|
rv = MaybePrepareForBytecodeEncodingAfterExecute(aRequest, rv);
|
|
|
|
// Even if we are not saving the bytecode of the current script, we have
|
|
// to trigger the encoding of the bytecode, as the current script can
|
|
// call functions of a script for which we are recording the bytecode.
|
|
LOG(("ScriptLoadRequest (%p): ScriptLoader = %p", aRequest, this));
|
|
MaybeTriggerBytecodeEncoding();
|
|
|
|
return rv;
|
|
}
|
|
|
|
/* static */
|
|
LoadedScript* ScriptLoader::GetActiveScript(JSContext* aCx) {
|
|
JS::Value value = JS::GetScriptedCallerPrivate(aCx);
|
|
if (value.isUndefined()) {
|
|
return nullptr;
|
|
}
|
|
|
|
return static_cast<LoadedScript*>(value.toPrivate());
|
|
}
|
|
|
|
void ScriptLoader::RegisterForBytecodeEncoding(ScriptLoadRequest* aRequest) {
|
|
MOZ_ASSERT(aRequest->mCacheInfo);
|
|
MOZ_ASSERT(aRequest->IsMarkedForBytecodeEncoding());
|
|
MOZ_DIAGNOSTIC_ASSERT(!aRequest->isInList());
|
|
mBytecodeEncodingQueue.AppendElement(aRequest);
|
|
}
|
|
|
|
void ScriptLoader::LoadEventFired() {
|
|
mLoadEventFired = true;
|
|
MaybeTriggerBytecodeEncoding();
|
|
|
|
if (!mMainThreadParseTime.IsZero()) {
|
|
Telemetry::Accumulate(
|
|
Telemetry::JS_PAGELOAD_PARSE_MS,
|
|
static_cast<uint32_t>(mMainThreadParseTime.ToMilliseconds()));
|
|
}
|
|
}
|
|
|
|
void ScriptLoader::Destroy() {
|
|
if (mShutdownObserver) {
|
|
mShutdownObserver->Unregister();
|
|
mShutdownObserver = nullptr;
|
|
}
|
|
|
|
CancelAndClearScriptLoadRequests();
|
|
GiveUpBytecodeEncoding();
|
|
}
|
|
|
|
void ScriptLoader::MaybeTriggerBytecodeEncoding() {
|
|
// If we already gave up, ensure that we are not going to enqueue any script,
|
|
// and that we finalize them properly.
|
|
if (mGiveUpEncoding) {
|
|
LOG(("ScriptLoader (%p): Keep giving-up bytecode encoding.", this));
|
|
GiveUpBytecodeEncoding();
|
|
return;
|
|
}
|
|
|
|
// We wait for the load event to be fired before saving the bytecode of
|
|
// any script to the cache. It is quite common to have load event
|
|
// listeners trigger more JavaScript execution, that we want to save as
|
|
// part of this start-up bytecode cache.
|
|
if (!mLoadEventFired) {
|
|
LOG(("ScriptLoader (%p): Wait for the load-end event to fire.", this));
|
|
return;
|
|
}
|
|
|
|
// No need to fire any event if there is no bytecode to be saved.
|
|
if (mBytecodeEncodingQueue.isEmpty()) {
|
|
LOG(("ScriptLoader (%p): No script in queue to be encoded.", this));
|
|
return;
|
|
}
|
|
|
|
// Wait until all scripts are loaded before saving the bytecode, such that
|
|
// we capture most of the intialization of the page.
|
|
if (HasPendingRequests()) {
|
|
LOG(("ScriptLoader (%p): Wait for other pending request to finish.", this));
|
|
return;
|
|
}
|
|
|
|
// Create a new runnable dedicated to encoding the content of the bytecode of
|
|
// all enqueued scripts when the document is idle. In case of failure, we
|
|
// give-up on encoding the bytecode.
|
|
nsCOMPtr<nsIRunnable> encoder = NewRunnableMethod(
|
|
"ScriptLoader::EncodeBytecode", this, &ScriptLoader::EncodeBytecode);
|
|
if (NS_FAILED(NS_DispatchToCurrentThreadQueue(encoder.forget(),
|
|
EventQueuePriority::Idle))) {
|
|
GiveUpBytecodeEncoding();
|
|
return;
|
|
}
|
|
|
|
LOG(("ScriptLoader (%p): Schedule bytecode encoding.", this));
|
|
}
|
|
|
|
void ScriptLoader::EncodeBytecode() {
|
|
LOG(("ScriptLoader (%p): Start bytecode encoding.", this));
|
|
|
|
// If any script got added in the previous loop cycle, wait until all
|
|
// remaining script executions are completed, such that we capture most of
|
|
// the initialization.
|
|
if (HasPendingRequests()) {
|
|
return;
|
|
}
|
|
|
|
// Should not be encoding modules at all.
|
|
nsCOMPtr<nsIScriptGlobalObject> globalObject = GetScriptGlobalObject();
|
|
if (!globalObject) {
|
|
GiveUpBytecodeEncoding();
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIScriptContext> context = globalObject->GetScriptContext();
|
|
if (!context) {
|
|
GiveUpBytecodeEncoding();
|
|
return;
|
|
}
|
|
|
|
AutoEntryScript aes(globalObject, "encode bytecode", true);
|
|
RefPtr<ScriptLoadRequest> request;
|
|
while (!mBytecodeEncodingQueue.isEmpty()) {
|
|
request = mBytecodeEncodingQueue.StealFirst();
|
|
MOZ_ASSERT(!IsWebExtensionRequest(request),
|
|
"Bytecode for web extension content scrips is not cached");
|
|
EncodeRequestBytecode(aes.cx(), request);
|
|
request->mScriptBytecode.clearAndFree();
|
|
request->DropBytecodeCacheReferences();
|
|
}
|
|
}
|
|
|
|
void ScriptLoader::EncodeRequestBytecode(JSContext* aCx,
|
|
ScriptLoadRequest* aRequest) {
|
|
using namespace mozilla::Telemetry;
|
|
nsresult rv = NS_OK;
|
|
MOZ_ASSERT(aRequest->mCacheInfo);
|
|
auto bytecodeFailed = mozilla::MakeScopeExit([&]() {
|
|
TRACE_FOR_TEST_NONE(aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
"scriptloader_bytecode_failed");
|
|
});
|
|
|
|
bool result;
|
|
if (aRequest->IsModuleRequest()) {
|
|
ModuleScript* moduleScript = aRequest->AsModuleRequest()->mModuleScript;
|
|
JS::Rooted<JSObject*> module(aCx, moduleScript->ModuleRecord());
|
|
result =
|
|
JS::FinishIncrementalEncoding(aCx, module, aRequest->mScriptBytecode);
|
|
} else {
|
|
JS::Rooted<JSScript*> script(aCx, aRequest->mScriptForBytecodeEncoding);
|
|
result =
|
|
JS::FinishIncrementalEncoding(aCx, script, aRequest->mScriptBytecode);
|
|
}
|
|
if (!result) {
|
|
// Encoding can be aborted for non-supported syntax (e.g. asm.js), or
|
|
// any other internal error.
|
|
// We don't care the error and just give up encoding.
|
|
JS_ClearPendingException(aCx);
|
|
|
|
LOG(("ScriptLoadRequest (%p): Cannot serialize bytecode", aRequest));
|
|
return;
|
|
}
|
|
|
|
Vector<uint8_t> compressedBytecode;
|
|
// TODO probably need to move this to a helper thread
|
|
if (!ScriptBytecodeCompress(aRequest->mScriptBytecode,
|
|
aRequest->mBytecodeOffset, compressedBytecode)) {
|
|
return;
|
|
}
|
|
|
|
if (compressedBytecode.length() >= UINT32_MAX) {
|
|
LOG(
|
|
("ScriptLoadRequest (%p): Bytecode cache is too large to be decoded "
|
|
"correctly.",
|
|
aRequest));
|
|
return;
|
|
}
|
|
|
|
// Open the output stream to the cache entry alternate data storage. This
|
|
// might fail if the stream is already open by another request, in which
|
|
// case, we just ignore the current one.
|
|
nsCOMPtr<nsIAsyncOutputStream> output;
|
|
rv = aRequest->mCacheInfo->OpenAlternativeOutputStream(
|
|
BytecodeMimeTypeFor(aRequest),
|
|
static_cast<int64_t>(compressedBytecode.length()),
|
|
getter_AddRefs(output));
|
|
if (NS_FAILED(rv)) {
|
|
LOG(
|
|
("ScriptLoadRequest (%p): Cannot open bytecode cache (rv = %X, output "
|
|
"= %p)",
|
|
aRequest, unsigned(rv), output.get()));
|
|
return;
|
|
}
|
|
MOZ_ASSERT(output);
|
|
|
|
auto closeOutStream = mozilla::MakeScopeExit([&]() {
|
|
rv = output->CloseWithStatus(rv);
|
|
LOG(("ScriptLoadRequest (%p): Closing (rv = %X)", aRequest, unsigned(rv)));
|
|
});
|
|
|
|
uint32_t n;
|
|
rv = output->Write(reinterpret_cast<char*>(compressedBytecode.begin()),
|
|
compressedBytecode.length(), &n);
|
|
LOG(
|
|
("ScriptLoadRequest (%p): Write bytecode cache (rv = %X, length = %u, "
|
|
"written = %u)",
|
|
aRequest, unsigned(rv), unsigned(compressedBytecode.length()), n));
|
|
if (NS_FAILED(rv)) {
|
|
return;
|
|
}
|
|
|
|
MOZ_RELEASE_ASSERT(compressedBytecode.length() == n);
|
|
|
|
bytecodeFailed.release();
|
|
TRACE_FOR_TEST_NONE(aRequest->GetScriptLoadContext()->GetScriptElement(),
|
|
"scriptloader_bytecode_saved");
|
|
}
|
|
|
|
void ScriptLoader::GiveUpBytecodeEncoding() {
|
|
// If the document went away prematurely, we still want to set this, in order
|
|
// to avoid queuing more scripts.
|
|
mGiveUpEncoding = true;
|
|
|
|
// Ideally we prefer to properly end the incremental encoder, such that we
|
|
// would not keep a large buffer around. If we cannot, we fallback on the
|
|
// removal of all request from the current list and these large buffers would
|
|
// be removed at the same time as the source object.
|
|
nsCOMPtr<nsIScriptGlobalObject> globalObject = GetScriptGlobalObject();
|
|
AutoAllowLegacyScriptExecution exemption;
|
|
Maybe<AutoEntryScript> aes;
|
|
|
|
if (globalObject) {
|
|
nsCOMPtr<nsIScriptContext> context = globalObject->GetScriptContext();
|
|
if (context) {
|
|
aes.emplace(globalObject, "give-up bytecode encoding", true);
|
|
}
|
|
}
|
|
|
|
while (!mBytecodeEncodingQueue.isEmpty()) {
|
|
RefPtr<ScriptLoadRequest> request = mBytecodeEncodingQueue.StealFirst();
|
|
LOG(("ScriptLoadRequest (%p): Cannot serialize bytecode", request.get()));
|
|
TRACE_FOR_TEST_NONE(request->GetScriptLoadContext()->GetScriptElement(),
|
|
"scriptloader_bytecode_failed");
|
|
MOZ_ASSERT(!IsWebExtensionRequest(request));
|
|
|
|
if (aes.isSome()) {
|
|
if (request->IsModuleRequest()) {
|
|
ModuleScript* moduleScript = request->AsModuleRequest()->mModuleScript;
|
|
JS::Rooted<JSObject*> module(aes->cx(), moduleScript->ModuleRecord());
|
|
JS::AbortIncrementalEncoding(module);
|
|
} else {
|
|
JS::Rooted<JSScript*> script(aes->cx(),
|
|
request->mScriptForBytecodeEncoding);
|
|
JS::AbortIncrementalEncoding(script);
|
|
}
|
|
}
|
|
|
|
request->mScriptBytecode.clearAndFree();
|
|
request->DropBytecodeCacheReferences();
|
|
}
|
|
}
|
|
|
|
bool ScriptLoader::HasPendingRequests() const {
|
|
return mParserBlockingRequest || !mXSLTRequests.isEmpty() ||
|
|
!mLoadedAsyncRequests.isEmpty() ||
|
|
!mNonAsyncExternalScriptInsertedRequests.isEmpty() ||
|
|
!mDeferRequests.isEmpty() || HasPendingDynamicImports() ||
|
|
!mPendingChildLoaders.IsEmpty();
|
|
// mOffThreadCompilingRequests are already being processed.
|
|
}
|
|
|
|
bool ScriptLoader::HasPendingDynamicImports() const {
|
|
if (mModuleLoader && mModuleLoader->HasPendingDynamicImports()) {
|
|
return true;
|
|
}
|
|
|
|
for (ModuleLoader* loader : mWebExtModuleLoaders) {
|
|
if (loader->HasPendingDynamicImports()) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
for (ModuleLoader* loader : mShadowRealmModuleLoaders) {
|
|
if (loader->HasPendingDynamicImports()) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void ScriptLoader::ProcessPendingRequestsAsync() {
|
|
if (HasPendingRequests()) {
|
|
nsCOMPtr<nsIRunnable> task =
|
|
NewRunnableMethod("dom::ScriptLoader::ProcessPendingRequests", this,
|
|
&ScriptLoader::ProcessPendingRequests);
|
|
if (mDocument) {
|
|
mDocument->Dispatch(task.forget());
|
|
} else {
|
|
NS_DispatchToCurrentThread(task.forget());
|
|
}
|
|
}
|
|
}
|
|
|
|
void ScriptLoader::ProcessPendingRequests() {
|
|
RefPtr<ScriptLoadRequest> request;
|
|
|
|
if (mParserBlockingRequest && mParserBlockingRequest->IsFinished() &&
|
|
ReadyToExecuteParserBlockingScripts()) {
|
|
request.swap(mParserBlockingRequest);
|
|
UnblockParser(request);
|
|
ProcessRequest(request);
|
|
ContinueParserAsync(request);
|
|
}
|
|
|
|
while (ReadyToExecuteParserBlockingScripts() && !mXSLTRequests.isEmpty() &&
|
|
mXSLTRequests.getFirst()->IsFinished()) {
|
|
request = mXSLTRequests.StealFirst();
|
|
ProcessRequest(request);
|
|
}
|
|
|
|
while (ReadyToExecuteScripts() && !mLoadedAsyncRequests.isEmpty()) {
|
|
request = mLoadedAsyncRequests.StealFirst();
|
|
if (request->IsModuleRequest()) {
|
|
ProcessRequest(request);
|
|
} else {
|
|
CompileOffThreadOrProcessRequest(request);
|
|
}
|
|
}
|
|
|
|
while (ReadyToExecuteScripts() &&
|
|
!mNonAsyncExternalScriptInsertedRequests.isEmpty() &&
|
|
mNonAsyncExternalScriptInsertedRequests.getFirst()->IsFinished()) {
|
|
// Violate the HTML5 spec and execute these in the insertion order in
|
|
// order to make LABjs and the "order" plug-in for RequireJS work with
|
|
// their Gecko-sniffed code path. See
|
|
// http://lists.w3.org/Archives/Public/public-html/2010Oct/0088.html
|
|
request = mNonAsyncExternalScriptInsertedRequests.StealFirst();
|
|
ProcessRequest(request);
|
|
}
|
|
|
|
if (mDeferCheckpointReached && mXSLTRequests.isEmpty()) {
|
|
while (ReadyToExecuteScripts() && !mDeferRequests.isEmpty() &&
|
|
mDeferRequests.getFirst()->IsFinished()) {
|
|
request = mDeferRequests.StealFirst();
|
|
ProcessRequest(request);
|
|
}
|
|
}
|
|
|
|
while (!mPendingChildLoaders.IsEmpty() &&
|
|
ReadyToExecuteParserBlockingScripts()) {
|
|
RefPtr<ScriptLoader> child = mPendingChildLoaders[0];
|
|
mPendingChildLoaders.RemoveElementAt(0);
|
|
child->RemoveParserBlockingScriptExecutionBlocker();
|
|
}
|
|
|
|
if (mDeferCheckpointReached && mDocument && !mParserBlockingRequest &&
|
|
mNonAsyncExternalScriptInsertedRequests.isEmpty() &&
|
|
mXSLTRequests.isEmpty() && mDeferRequests.isEmpty() &&
|
|
MaybeRemovedDeferRequests()) {
|
|
return ProcessPendingRequests();
|
|
}
|
|
|
|
if (mDeferCheckpointReached && mDocument && !mParserBlockingRequest &&
|
|
mLoadingAsyncRequests.isEmpty() && mLoadedAsyncRequests.isEmpty() &&
|
|
mNonAsyncExternalScriptInsertedRequests.isEmpty() &&
|
|
mXSLTRequests.isEmpty() && mDeferRequests.isEmpty()) {
|
|
// No more pending scripts; time to unblock onload.
|
|
// OK to unblock onload synchronously here, since callers must be
|
|
// prepared for the world changing anyway.
|
|
mDeferCheckpointReached = false;
|
|
mDocument->UnblockOnload(true);
|
|
}
|
|
}
|
|
|
|
bool ScriptLoader::ReadyToExecuteParserBlockingScripts() {
|
|
// Make sure the SelfReadyToExecuteParserBlockingScripts check is first, so
|
|
// that we don't block twice on an ancestor.
|
|
if (!SelfReadyToExecuteParserBlockingScripts()) {
|
|
return false;
|
|
}
|
|
|
|
if (mDocument && mDocument->GetWindowContext()) {
|
|
for (WindowContext* wc =
|
|
mDocument->GetWindowContext()->GetParentWindowContext();
|
|
wc; wc = wc->GetParentWindowContext()) {
|
|
if (Document* doc = wc->GetDocument()) {
|
|
ScriptLoader* ancestor = doc->ScriptLoader();
|
|
if (!ancestor->SelfReadyToExecuteParserBlockingScripts() &&
|
|
ancestor->AddPendingChildLoader(this)) {
|
|
AddParserBlockingScriptExecutionBlocker();
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
template <typename Unit>
|
|
static nsresult ConvertToUnicode(nsIChannel* aChannel, const uint8_t* aData,
|
|
uint32_t aLength,
|
|
const nsAString& aHintCharset,
|
|
Document* aDocument, Unit*& aBufOut,
|
|
size_t& aLengthOut) {
|
|
if (!aLength) {
|
|
aBufOut = nullptr;
|
|
aLengthOut = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
auto data = Span(aData, aLength);
|
|
|
|
// The encoding info precedence is as follows from high to low:
|
|
// The BOM
|
|
// HTTP Content-Type (if name recognized)
|
|
// charset attribute (if name recognized)
|
|
// The encoding of the document
|
|
|
|
UniquePtr<Decoder> unicodeDecoder;
|
|
|
|
const Encoding* encoding;
|
|
std::tie(encoding, std::ignore) = Encoding::ForBOM(data);
|
|
if (encoding) {
|
|
unicodeDecoder = encoding->NewDecoderWithBOMRemoval();
|
|
}
|
|
|
|
if (!unicodeDecoder && aChannel) {
|
|
nsAutoCString label;
|
|
if (NS_SUCCEEDED(aChannel->GetContentCharset(label)) &&
|
|
(encoding = Encoding::ForLabel(label))) {
|
|
unicodeDecoder = encoding->NewDecoderWithoutBOMHandling();
|
|
}
|
|
}
|
|
|
|
if (!unicodeDecoder && (encoding = Encoding::ForLabel(aHintCharset))) {
|
|
unicodeDecoder = encoding->NewDecoderWithoutBOMHandling();
|
|
}
|
|
|
|
if (!unicodeDecoder && aDocument) {
|
|
unicodeDecoder =
|
|
aDocument->GetDocumentCharacterSet()->NewDecoderWithoutBOMHandling();
|
|
}
|
|
|
|
if (!unicodeDecoder) {
|
|
// Curiously, there are various callers that don't pass aDocument. The
|
|
// fallback in the old code was ISO-8859-1, which behaved like
|
|
// windows-1252.
|
|
unicodeDecoder = WINDOWS_1252_ENCODING->NewDecoderWithoutBOMHandling();
|
|
}
|
|
|
|
auto signalOOM = mozilla::MakeScopeExit([&aBufOut, &aLengthOut]() {
|
|
aBufOut = nullptr;
|
|
aLengthOut = 0;
|
|
});
|
|
|
|
CheckedInt<size_t> bufferLength =
|
|
ScriptDecoding<Unit>::MaxBufferLength(unicodeDecoder, aLength);
|
|
if (!bufferLength.isValid()) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
CheckedInt<size_t> bufferByteSize = bufferLength * sizeof(Unit);
|
|
if (!bufferByteSize.isValid()) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
aBufOut = static_cast<Unit*>(js_malloc(bufferByteSize.value()));
|
|
if (!aBufOut) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
signalOOM.release();
|
|
aLengthOut = ScriptDecoding<Unit>::DecodeInto(
|
|
unicodeDecoder, data, Span(aBufOut, bufferLength.value()),
|
|
/* aEndOfSource = */ true);
|
|
return NS_OK;
|
|
}
|
|
|
|
/* static */
|
|
nsresult ScriptLoader::ConvertToUTF16(
|
|
nsIChannel* aChannel, const uint8_t* aData, uint32_t aLength,
|
|
const nsAString& aHintCharset, Document* aDocument,
|
|
UniquePtr<char16_t[], JS::FreePolicy>& aBufOut, size_t& aLengthOut) {
|
|
char16_t* bufOut;
|
|
nsresult rv = ConvertToUnicode(aChannel, aData, aLength, aHintCharset,
|
|
aDocument, bufOut, aLengthOut);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
aBufOut.reset(bufOut);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
/* static */
|
|
nsresult ScriptLoader::ConvertToUTF8(
|
|
nsIChannel* aChannel, const uint8_t* aData, uint32_t aLength,
|
|
const nsAString& aHintCharset, Document* aDocument,
|
|
UniquePtr<Utf8Unit[], JS::FreePolicy>& aBufOut, size_t& aLengthOut) {
|
|
Utf8Unit* bufOut;
|
|
nsresult rv = ConvertToUnicode(aChannel, aData, aLength, aHintCharset,
|
|
aDocument, bufOut, aLengthOut);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
aBufOut.reset(bufOut);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
nsresult ScriptLoader::OnStreamComplete(
|
|
nsIIncrementalStreamLoader* aLoader, ScriptLoadRequest* aRequest,
|
|
nsresult aChannelStatus, nsresult aSRIStatus,
|
|
SRICheckDataVerifier* aSRIDataVerifier) {
|
|
NS_ASSERTION(aRequest, "null request in stream complete handler");
|
|
NS_ENSURE_TRUE(aRequest, NS_ERROR_FAILURE);
|
|
|
|
nsresult rv = VerifySRI(aRequest, aLoader, aSRIStatus, aSRIDataVerifier);
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
// If we are loading from source, save the computed SRI hash or a dummy SRI
|
|
// hash in case we are going to save the bytecode of this script in the
|
|
// cache.
|
|
if (aRequest->IsSource()) {
|
|
uint32_t sriLength = 0;
|
|
rv = SaveSRIHash(aRequest, aSRIDataVerifier, &sriLength);
|
|
MOZ_ASSERT_IF(NS_SUCCEEDED(rv),
|
|
aRequest->mScriptBytecode.length() == sriLength);
|
|
|
|
aRequest->mBytecodeOffset = JS::AlignTranscodingBytecodeOffset(sriLength);
|
|
if (aRequest->mBytecodeOffset != sriLength) {
|
|
// We need extra padding after SRI hash.
|
|
if (!aRequest->mScriptBytecode.resize(aRequest->mBytecodeOffset)) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
rv = PrepareLoadedRequest(aRequest, aLoader, aChannelStatus);
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
ReportErrorToConsole(aRequest, rv);
|
|
}
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
// When loading bytecode, we verify the SRI hash. If it does not match the
|
|
// one from the document we restart the load, forcing us to load the source
|
|
// instead. If this happens do not remove the current request from script
|
|
// loader's data structures or fire any events.
|
|
if (aChannelStatus != NS_BINDING_RETARGETED) {
|
|
HandleLoadError(aRequest, rv);
|
|
}
|
|
}
|
|
|
|
// Process our request and/or any pending ones
|
|
ProcessPendingRequests();
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult ScriptLoader::VerifySRI(ScriptLoadRequest* aRequest,
|
|
nsIIncrementalStreamLoader* aLoader,
|
|
nsresult aSRIStatus,
|
|
SRICheckDataVerifier* aSRIDataVerifier) const {
|
|
nsCOMPtr<nsIRequest> channelRequest;
|
|
aLoader->GetRequest(getter_AddRefs(channelRequest));
|
|
nsCOMPtr<nsIChannel> channel;
|
|
channel = do_QueryInterface(channelRequest);
|
|
|
|
nsresult rv = NS_OK;
|
|
if (!aRequest->mIntegrity.IsEmpty() && NS_SUCCEEDED((rv = aSRIStatus))) {
|
|
MOZ_ASSERT(aSRIDataVerifier);
|
|
MOZ_ASSERT(mReporter);
|
|
|
|
nsAutoCString sourceUri;
|
|
if (mDocument && mDocument->GetDocumentURI()) {
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
rv = aSRIDataVerifier->Verify(aRequest->mIntegrity, channel, sourceUri,
|
|
mReporter);
|
|
if (channelRequest) {
|
|
mReporter->FlushReportsToConsole(
|
|
nsContentUtils::GetInnerWindowID(channelRequest));
|
|
} else {
|
|
mReporter->FlushConsoleReports(mDocument);
|
|
}
|
|
if (NS_FAILED(rv)) {
|
|
rv = NS_ERROR_SRI_CORRUPT;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult ScriptLoader::SaveSRIHash(ScriptLoadRequest* aRequest,
|
|
SRICheckDataVerifier* aSRIDataVerifier,
|
|
uint32_t* sriLength) const {
|
|
MOZ_ASSERT(aRequest->IsSource());
|
|
MOZ_ASSERT(aRequest->mScriptBytecode.empty());
|
|
|
|
uint32_t len;
|
|
|
|
// If the integrity metadata does not correspond to a valid hash function,
|
|
// IsComplete would be false.
|
|
if (!aRequest->mIntegrity.IsEmpty() && aSRIDataVerifier->IsComplete()) {
|
|
MOZ_ASSERT(aRequest->mScriptBytecode.length() == 0);
|
|
|
|
// Encode the SRI computed hash.
|
|
len = aSRIDataVerifier->DataSummaryLength();
|
|
|
|
if (!aRequest->mScriptBytecode.resize(len)) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
DebugOnly<nsresult> res = aSRIDataVerifier->ExportDataSummary(
|
|
len, aRequest->mScriptBytecode.begin());
|
|
MOZ_ASSERT(NS_SUCCEEDED(res));
|
|
} else {
|
|
MOZ_ASSERT(aRequest->mScriptBytecode.length() == 0);
|
|
|
|
// Encode a dummy SRI hash.
|
|
len = SRICheckDataVerifier::EmptyDataSummaryLength();
|
|
|
|
if (!aRequest->mScriptBytecode.resize(len)) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
DebugOnly<nsresult> res = SRICheckDataVerifier::ExportEmptyDataSummary(
|
|
len, aRequest->mScriptBytecode.begin());
|
|
MOZ_ASSERT(NS_SUCCEEDED(res));
|
|
}
|
|
|
|
// Verify that the exported and predicted length correspond.
|
|
DebugOnly<uint32_t> srilen{};
|
|
MOZ_ASSERT(NS_SUCCEEDED(SRICheckDataVerifier::DataSummaryLength(
|
|
len, aRequest->mScriptBytecode.begin(), &srilen)));
|
|
MOZ_ASSERT(srilen == len);
|
|
|
|
*sriLength = len;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void ScriptLoader::ReportErrorToConsole(ScriptLoadRequest* aRequest,
|
|
nsresult aResult) const {
|
|
MOZ_ASSERT(aRequest);
|
|
|
|
if (aRequest->GetScriptLoadContext()->IsPreload()) {
|
|
// Skip reporting errors in preload requests. If the request is actually
|
|
// used then we will report the error in ReportPreloadErrorsToConsole below.
|
|
aRequest->GetScriptLoadContext()->mUnreportedPreloadError = aResult;
|
|
return;
|
|
}
|
|
|
|
bool isScript = !aRequest->IsModuleRequest();
|
|
const char* message;
|
|
if (aResult == NS_ERROR_MALFORMED_URI) {
|
|
message = isScript ? "ScriptSourceMalformed" : "ModuleSourceMalformed";
|
|
} else if (aResult == NS_ERROR_DOM_BAD_URI) {
|
|
message = isScript ? "ScriptSourceNotAllowed" : "ModuleSourceNotAllowed";
|
|
} else if (aResult == NS_ERROR_DOM_WEBEXT_CONTENT_SCRIPT_URI) {
|
|
MOZ_ASSERT(!isScript);
|
|
message = "WebExtContentScriptModuleSourceNotAllowed";
|
|
} else if (net::UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(
|
|
aResult)) {
|
|
// Blocking classifier error codes already show their own console messages.
|
|
return;
|
|
} else {
|
|
message = isScript ? "ScriptSourceLoadFailed" : "ModuleSourceLoadFailed";
|
|
}
|
|
|
|
AutoTArray<nsString, 1> params;
|
|
CopyUTF8toUTF16(aRequest->mURI->GetSpecOrDefault(), *params.AppendElement());
|
|
|
|
nsIScriptElement* element =
|
|
aRequest->GetScriptLoadContext()->GetScriptElement();
|
|
uint32_t lineNo = element ? element->GetScriptLineNumber() : 0;
|
|
uint32_t columnNo = element ? element->GetScriptColumnNumber() : 0;
|
|
|
|
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
|
|
"Script Loader"_ns, mDocument,
|
|
nsContentUtils::eDOM_PROPERTIES, message,
|
|
params, nullptr, u""_ns, lineNo, columnNo);
|
|
}
|
|
|
|
void ScriptLoader::ReportWarningToConsole(
|
|
ScriptLoadRequest* aRequest, const char* aMessageName,
|
|
const nsTArray<nsString>& aParams) const {
|
|
nsIScriptElement* element =
|
|
aRequest->GetScriptLoadContext()->GetScriptElement();
|
|
uint32_t lineNo = element ? element->GetScriptLineNumber() : 0;
|
|
uint32_t columnNo = element ? element->GetScriptColumnNumber() : 0;
|
|
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
|
|
"Script Loader"_ns, mDocument,
|
|
nsContentUtils::eDOM_PROPERTIES, aMessageName,
|
|
aParams, nullptr, u""_ns, lineNo, columnNo);
|
|
}
|
|
|
|
void ScriptLoader::ReportPreloadErrorsToConsole(ScriptLoadRequest* aRequest) {
|
|
if (NS_FAILED(aRequest->GetScriptLoadContext()->mUnreportedPreloadError)) {
|
|
ReportErrorToConsole(
|
|
aRequest, aRequest->GetScriptLoadContext()->mUnreportedPreloadError);
|
|
aRequest->GetScriptLoadContext()->mUnreportedPreloadError = NS_OK;
|
|
}
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
for (const auto& childRequest : aRequest->AsModuleRequest()->mImports) {
|
|
ReportPreloadErrorsToConsole(childRequest);
|
|
}
|
|
}
|
|
}
|
|
|
|
void ScriptLoader::HandleLoadError(ScriptLoadRequest* aRequest,
|
|
nsresult aResult) {
|
|
/*
|
|
* Handle script not loading error because source was an tracking URL (or
|
|
* fingerprinting, cryptomining, etc).
|
|
* We make a note of this script node by including it in a dedicated
|
|
* array of blocked tracking nodes under its parent document.
|
|
*/
|
|
if (net::UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(
|
|
aResult)) {
|
|
nsCOMPtr<nsIContent> cont =
|
|
do_QueryInterface(aRequest->GetScriptLoadContext()->GetScriptElement());
|
|
mDocument->AddBlockedNodeByClassifier(cont);
|
|
}
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
MOZ_ASSERT(!aRequest->GetScriptLoadContext()->mIsInline);
|
|
aRequest->AsModuleRequest()->OnFetchComplete(aResult);
|
|
}
|
|
|
|
if (aRequest->GetScriptLoadContext()->mInDeferList) {
|
|
MOZ_ASSERT_IF(aRequest->IsModuleRequest(),
|
|
aRequest->AsModuleRequest()->IsTopLevel());
|
|
if (aRequest->isInList()) {
|
|
RefPtr<ScriptLoadRequest> req = mDeferRequests.Steal(aRequest);
|
|
FireScriptAvailable(aResult, req);
|
|
}
|
|
} else if (aRequest->GetScriptLoadContext()->mInAsyncList) {
|
|
MOZ_ASSERT_IF(aRequest->IsModuleRequest(),
|
|
aRequest->AsModuleRequest()->IsTopLevel());
|
|
if (aRequest->isInList()) {
|
|
RefPtr<ScriptLoadRequest> req = mLoadingAsyncRequests.Steal(aRequest);
|
|
FireScriptAvailable(aResult, req);
|
|
}
|
|
} else if (aRequest->GetScriptLoadContext()->mIsNonAsyncScriptInserted) {
|
|
if (aRequest->isInList()) {
|
|
RefPtr<ScriptLoadRequest> req =
|
|
mNonAsyncExternalScriptInsertedRequests.Steal(aRequest);
|
|
FireScriptAvailable(aResult, req);
|
|
}
|
|
} else if (aRequest->GetScriptLoadContext()->mIsXSLT) {
|
|
if (aRequest->isInList()) {
|
|
RefPtr<ScriptLoadRequest> req = mXSLTRequests.Steal(aRequest);
|
|
FireScriptAvailable(aResult, req);
|
|
}
|
|
} else if (aRequest->GetScriptLoadContext()->IsPreload()) {
|
|
if (aRequest->IsModuleRequest()) {
|
|
aRequest->Cancel();
|
|
}
|
|
if (aRequest->IsTopLevel()) {
|
|
// Request may already have been removed by
|
|
// CancelAndClearScriptLoadRequests.
|
|
mPreloads.RemoveElement(aRequest, PreloadRequestComparator());
|
|
}
|
|
MOZ_ASSERT(!aRequest->isInList());
|
|
AccumulateCategorical(LABELS_DOM_SCRIPT_PRELOAD_RESULT::LoadError);
|
|
} else if (aRequest->IsModuleRequest()) {
|
|
ModuleLoadRequest* modReq = aRequest->AsModuleRequest();
|
|
if (modReq->IsDynamicImport()) {
|
|
MOZ_ASSERT(modReq->IsTopLevel());
|
|
if (aRequest->isInList()) {
|
|
modReq->CancelDynamicImport(aResult);
|
|
}
|
|
} else {
|
|
MOZ_ASSERT(!modReq->IsTopLevel());
|
|
MOZ_ASSERT(!modReq->isInList());
|
|
modReq->Cancel();
|
|
// The error is handled for the top level module.
|
|
}
|
|
} else if (mParserBlockingRequest == aRequest) {
|
|
MOZ_ASSERT(!aRequest->isInList());
|
|
mParserBlockingRequest = nullptr;
|
|
UnblockParser(aRequest);
|
|
|
|
// Ensure that we treat aRequest->GetScriptLoadContext()->GetScriptElement()
|
|
// as our current parser-inserted script while firing onerror on it.
|
|
MOZ_ASSERT(aRequest->GetScriptLoadContext()
|
|
->GetScriptElement()
|
|
->GetParserCreated());
|
|
nsCOMPtr<nsIScriptElement> oldParserInsertedScript =
|
|
mCurrentParserInsertedScript;
|
|
mCurrentParserInsertedScript =
|
|
aRequest->GetScriptLoadContext()->GetScriptElement();
|
|
FireScriptAvailable(aResult, aRequest);
|
|
ContinueParserAsync(aRequest);
|
|
mCurrentParserInsertedScript = oldParserInsertedScript;
|
|
} else {
|
|
// This happens for blocking requests cancelled by ParsingComplete().
|
|
// Ignore cancellation status for link-preload requests, as cancellation can
|
|
// be omitted for them when SRI is stronger on consumer tags.
|
|
MOZ_ASSERT(aRequest->IsCanceled() ||
|
|
aRequest->GetScriptLoadContext()->IsLinkPreloadScript());
|
|
MOZ_ASSERT(!aRequest->isInList());
|
|
}
|
|
}
|
|
|
|
void ScriptLoader::UnblockParser(ScriptLoadRequest* aParserBlockingRequest) {
|
|
aParserBlockingRequest->GetScriptLoadContext()
|
|
->GetScriptElement()
|
|
->UnblockParser();
|
|
}
|
|
|
|
void ScriptLoader::ContinueParserAsync(
|
|
ScriptLoadRequest* aParserBlockingRequest) {
|
|
aParserBlockingRequest->GetScriptLoadContext()
|
|
->GetScriptElement()
|
|
->ContinueParserAsync();
|
|
}
|
|
|
|
uint32_t ScriptLoader::NumberOfProcessors() {
|
|
if (mNumberOfProcessors > 0) {
|
|
return mNumberOfProcessors;
|
|
}
|
|
|
|
int32_t numProcs = PR_GetNumberOfProcessors();
|
|
if (numProcs > 0) {
|
|
mNumberOfProcessors = numProcs;
|
|
}
|
|
return mNumberOfProcessors;
|
|
}
|
|
|
|
int32_t ScriptLoader::PhysicalSizeOfMemoryInGB() {
|
|
// 0 is a valid result from PR_GetPhysicalMemorySize() which
|
|
// means a failure occured.
|
|
if (mPhysicalSizeOfMemory >= 0) {
|
|
return mPhysicalSizeOfMemory;
|
|
}
|
|
|
|
// Save the size in GB.
|
|
mPhysicalSizeOfMemory =
|
|
static_cast<int32_t>(PR_GetPhysicalMemorySize() >> 30);
|
|
return mPhysicalSizeOfMemory;
|
|
}
|
|
|
|
static bool IsInternalURIScheme(nsIURI* uri) {
|
|
return uri->SchemeIs("moz-extension") || uri->SchemeIs("resource") ||
|
|
uri->SchemeIs("chrome");
|
|
}
|
|
|
|
bool ScriptLoader::ShouldApplyDelazifyStrategy(ScriptLoadRequest* aRequest) {
|
|
// Full parse everything if negative.
|
|
if (StaticPrefs::dom_script_loader_delazification_max_size() < 0) {
|
|
return true;
|
|
}
|
|
|
|
// Be conservative on machines with 2GB or less of memory.
|
|
if (PhysicalSizeOfMemoryInGB() <=
|
|
StaticPrefs::dom_script_loader_delazification_min_mem()) {
|
|
return false;
|
|
}
|
|
|
|
uint32_t max_size = static_cast<uint32_t>(
|
|
StaticPrefs::dom_script_loader_delazification_max_size());
|
|
uint32_t script_size =
|
|
aRequest->ScriptTextLength() > 0
|
|
? static_cast<uint32_t>(aRequest->ScriptTextLength())
|
|
: 0;
|
|
|
|
if (mTotalFullParseSize + script_size < max_size) {
|
|
return true;
|
|
}
|
|
|
|
if (LOG_ENABLED()) {
|
|
nsCString url = aRequest->mURI->GetSpecOrDefault();
|
|
LOG(
|
|
("ScriptLoadRequest (%p): non-on-demand-only Parsing Disabled for (%s) "
|
|
"with size=%u because mTotalFullParseSize=%u would exceed max_size=%u",
|
|
aRequest, url.get(), script_size, mTotalFullParseSize, max_size));
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void ScriptLoader::ApplyDelazifyStrategy(JS::CompileOptions* aOptions) {
|
|
JS::DelazificationOption strategy =
|
|
JS::DelazificationOption::ParseEverythingEagerly;
|
|
uint32_t strategyIndex =
|
|
StaticPrefs::dom_script_loader_delazification_strategy();
|
|
|
|
// Assert that all enumerated values of DelazificationOption are dense between
|
|
// OnDemandOnly and ParseEverythingEagerly.
|
|
#ifdef DEBUG
|
|
uint32_t count = 0;
|
|
uint32_t mask = 0;
|
|
# define _COUNT_ENTRIES(Name) count++;
|
|
# define _MASK_ENTRIES(Name) \
|
|
mask |= 1 << uint32_t(JS::DelazificationOption::Name);
|
|
|
|
FOREACH_DELAZIFICATION_STRATEGY(_COUNT_ENTRIES);
|
|
MOZ_ASSERT(count == uint32_t(strategy) + 1);
|
|
FOREACH_DELAZIFICATION_STRATEGY(_MASK_ENTRIES);
|
|
MOZ_ASSERT(((mask + 1) & mask) == 0);
|
|
# undef _COUNT_ENTRIES
|
|
# undef _MASK_ENTRIES
|
|
#endif
|
|
|
|
// Any strategy index larger than ParseEverythingEagerly would default to
|
|
// ParseEverythingEagerly.
|
|
if (strategyIndex <= uint32_t(strategy)) {
|
|
strategy = JS::DelazificationOption(uint8_t(strategyIndex));
|
|
}
|
|
|
|
aOptions->setEagerDelazificationStrategy(strategy);
|
|
}
|
|
|
|
bool ScriptLoader::ShouldCompileOffThread(ScriptLoadRequest* aRequest) {
|
|
if (NumberOfProcessors() <= 1) {
|
|
return false;
|
|
}
|
|
if (aRequest == mParserBlockingRequest) {
|
|
return true;
|
|
}
|
|
if (SpeculativeOMTParsingEnabled()) {
|
|
// Processing non async inserted scripts too early can potentially delay the
|
|
// load event from firing so focus on other scripts instead.
|
|
if (aRequest->GetScriptLoadContext()->mIsNonAsyncScriptInserted &&
|
|
!StaticPrefs::
|
|
dom_script_loader_external_scripts_speculate_non_parser_inserted_enabled()) {
|
|
return false;
|
|
}
|
|
|
|
// Async and link preload scripts do not need to be parsed right away.
|
|
if (aRequest->GetScriptLoadContext()->IsAsyncScript() &&
|
|
!StaticPrefs::
|
|
dom_script_loader_external_scripts_speculate_async_enabled()) {
|
|
return false;
|
|
}
|
|
|
|
if (aRequest->GetScriptLoadContext()->IsLinkPreloadScript() &&
|
|
!StaticPrefs::
|
|
dom_script_loader_external_scripts_speculate_link_preload_enabled()) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
nsresult ScriptLoader::PrepareLoadedRequest(ScriptLoadRequest* aRequest,
|
|
nsIIncrementalStreamLoader* aLoader,
|
|
nsresult aStatus) {
|
|
if (NS_FAILED(aStatus)) {
|
|
return aStatus;
|
|
}
|
|
|
|
if (aRequest->IsCanceled()) {
|
|
return NS_BINDING_ABORTED;
|
|
}
|
|
MOZ_ASSERT(aRequest->IsFetching());
|
|
CollectScriptTelemetry(aRequest);
|
|
|
|
// If we don't have a document, then we need to abort further
|
|
// evaluation.
|
|
if (!mDocument) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
// If the load returned an error page, then we need to abort
|
|
nsCOMPtr<nsIRequest> req;
|
|
nsresult rv = aLoader->GetRequest(getter_AddRefs(req));
|
|
NS_ASSERTION(req, "StreamLoader's request went away prematurely");
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(req);
|
|
if (httpChannel) {
|
|
bool requestSucceeded;
|
|
rv = httpChannel->GetRequestSucceeded(&requestSucceeded);
|
|
if (NS_SUCCEEDED(rv) && !requestSucceeded) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
// https://html.spec.whatwg.org/multipage/webappapis.html#fetch-a-single-module-script
|
|
// Update script's referrer-policy if there's a Referrer-Policy header in
|
|
// the HTTP response.
|
|
ReferrerPolicy policy =
|
|
nsContentUtils::GetReferrerPolicyFromChannel(httpChannel);
|
|
if (policy != ReferrerPolicy::_empty) {
|
|
aRequest->UpdateReferrerPolicy(policy);
|
|
}
|
|
}
|
|
|
|
nsAutoCString sourceMapURL;
|
|
if (nsContentUtils::GetSourceMapURL(httpChannel, sourceMapURL)) {
|
|
aRequest->mSourceMapURL = Some(NS_ConvertUTF8toUTF16(sourceMapURL));
|
|
}
|
|
|
|
nsCOMPtr<nsIClassifiedChannel> classifiedChannel = do_QueryInterface(req);
|
|
MOZ_ASSERT(classifiedChannel);
|
|
if (classifiedChannel &&
|
|
classifiedChannel->IsThirdPartyTrackingResource()) {
|
|
aRequest->GetScriptLoadContext()->SetIsTracking();
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIChannel> channel = do_QueryInterface(req);
|
|
// If this load was subject to a CORS check, don't flag it with a separate
|
|
// origin principal, so that it will treat our document's principal as the
|
|
// origin principal. Module loads always use CORS.
|
|
if (!aRequest->IsModuleRequest() && aRequest->CORSMode() == CORS_NONE) {
|
|
rv = nsContentUtils::GetSecurityManager()->GetChannelResultPrincipal(
|
|
channel, getter_AddRefs(aRequest->mOriginPrincipal));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
// This assertion could fire errorously if we ran out of memory when
|
|
// inserting the request in the array. However it's an unlikely case
|
|
// so if you see this assertion it is likely something else that is
|
|
// wrong, especially if you see it more than once.
|
|
NS_ASSERTION(mDeferRequests.Contains(aRequest) ||
|
|
mLoadingAsyncRequests.Contains(aRequest) ||
|
|
mNonAsyncExternalScriptInsertedRequests.Contains(aRequest) ||
|
|
mXSLTRequests.Contains(aRequest) ||
|
|
(aRequest->IsModuleRequest() &&
|
|
(aRequest->AsModuleRequest()->IsRegisteredDynamicImport() ||
|
|
!aRequest->AsModuleRequest()->IsTopLevel())) ||
|
|
mPreloads.Contains(aRequest, PreloadRequestComparator()) ||
|
|
mParserBlockingRequest == aRequest,
|
|
"aRequest should be pending!");
|
|
|
|
nsCOMPtr<nsIURI> uri;
|
|
rv = channel->GetOriginalURI(getter_AddRefs(uri));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Fixup moz-extension: and resource: URIs, because the channel URI will
|
|
// point to file:, which won't be allowed to load.
|
|
if (uri && IsInternalURIScheme(uri)) {
|
|
aRequest->mBaseURL = uri;
|
|
} else {
|
|
channel->GetURI(getter_AddRefs(aRequest->mBaseURL));
|
|
}
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
ModuleLoadRequest* request = aRequest->AsModuleRequest();
|
|
|
|
// When loading a module, only responses with a JavaScript MIME type are
|
|
// acceptable.
|
|
nsAutoCString mimeType;
|
|
channel->GetContentType(mimeType);
|
|
NS_ConvertUTF8toUTF16 typeString(mimeType);
|
|
if (!nsContentUtils::IsJavascriptMIMEType(typeString)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Attempt to compile off main thread.
|
|
bool couldCompile = false;
|
|
rv = AttemptOffThreadScriptCompile(request, &couldCompile);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (couldCompile) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Otherwise compile it right away and start fetching descendents.
|
|
return request->OnFetchComplete(NS_OK);
|
|
}
|
|
|
|
// The script is now loaded and ready to run.
|
|
aRequest->SetReady();
|
|
|
|
// If speculative parsing is enabled attempt to compile all
|
|
// external scripts off-main-thread. Otherwise, only omt compile scripts
|
|
// blocking the parser.
|
|
if (ShouldCompileOffThread(aRequest)) {
|
|
MOZ_ASSERT(!aRequest->IsModuleRequest());
|
|
bool couldCompile = false;
|
|
nsresult rv = AttemptOffThreadScriptCompile(aRequest, &couldCompile);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (couldCompile) {
|
|
MOZ_ASSERT(aRequest->mState == ScriptLoadRequest::State::Compiling,
|
|
"Request should be off-thread compiling now.");
|
|
return NS_OK;
|
|
}
|
|
|
|
// If off-thread compile was rejected, continue with regular processing.
|
|
}
|
|
|
|
MaybeMoveToLoadedList(aRequest);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void ScriptLoader::DeferCheckpointReached() {
|
|
if (mDeferEnabled) {
|
|
// Have to check because we apparently get ParsingComplete
|
|
// without BeginDeferringScripts in some cases
|
|
mDeferCheckpointReached = true;
|
|
}
|
|
|
|
mDeferEnabled = false;
|
|
ProcessPendingRequests();
|
|
}
|
|
|
|
void ScriptLoader::ParsingComplete(bool aTerminated) {
|
|
if (aTerminated) {
|
|
CancelAndClearScriptLoadRequests();
|
|
|
|
// Have to call this even if aTerminated so we'll correctly unblock onload.
|
|
DeferCheckpointReached();
|
|
}
|
|
}
|
|
|
|
void ScriptLoader::PreloadURI(
|
|
nsIURI* aURI, const nsAString& aCharset, const nsAString& aType,
|
|
const nsAString& aCrossOrigin, const nsAString& aNonce,
|
|
const nsAString& aFetchPriority, const nsAString& aIntegrity,
|
|
bool aScriptFromHead, bool aAsync, bool aDefer, bool aLinkPreload,
|
|
const ReferrerPolicy aReferrerPolicy, uint64_t aEarlyHintPreloaderId) {
|
|
NS_ENSURE_TRUE_VOID(mDocument);
|
|
// Check to see if scripts has been turned off.
|
|
if (!mEnabled || !mDocument->IsScriptEnabled()) {
|
|
return;
|
|
}
|
|
|
|
ScriptKind scriptKind = ScriptKind::eClassic;
|
|
|
|
static const char kASCIIWhitespace[] = "\t\n\f\r ";
|
|
|
|
nsAutoString type(aType);
|
|
type.Trim(kASCIIWhitespace);
|
|
if (type.LowerCaseEqualsASCII("module")) {
|
|
scriptKind = ScriptKind::eModule;
|
|
}
|
|
|
|
if (scriptKind == ScriptKind::eClassic && !aType.IsEmpty() &&
|
|
!nsContentUtils::IsJavascriptMIMEType(aType)) {
|
|
// Unknown type. Don't load it.
|
|
return;
|
|
}
|
|
|
|
SRIMetadata sriMetadata;
|
|
GetSRIMetadata(aIntegrity, &sriMetadata);
|
|
|
|
const auto requestPriority = FetchPriorityToRequestPriority(
|
|
nsGenericHTMLElement::ToFetchPriority(aFetchPriority));
|
|
|
|
// For link type "modulepreload":
|
|
// https://html.spec.whatwg.org/multipage/links.html#link-type-modulepreload
|
|
// Step 11. Let options be a script fetch options whose cryptographic nonce is
|
|
// cryptographic nonce, integrity metadata is integrity metadata, parser
|
|
// metadata is "not-parser-inserted", credentials mode is credentials mode,
|
|
// referrer policy is referrer policy, and fetch priority is fetch priority.
|
|
//
|
|
// We treat speculative <script> loads as parser-inserted, because they
|
|
// come from a parser. This will also match how they should be treated
|
|
// as a normal load.
|
|
RefPtr<ScriptLoadRequest> request =
|
|
CreateLoadRequest(scriptKind, aURI, nullptr, mDocument->NodePrincipal(),
|
|
Element::StringToCORSMode(aCrossOrigin), aNonce,
|
|
requestPriority, sriMetadata, aReferrerPolicy,
|
|
aLinkPreload ? ParserMetadata::NotParserInserted
|
|
: ParserMetadata::ParserInserted);
|
|
request->GetScriptLoadContext()->mIsInline = false;
|
|
request->GetScriptLoadContext()->mScriptFromHead = aScriptFromHead;
|
|
request->GetScriptLoadContext()->SetScriptMode(aDefer, aAsync, aLinkPreload);
|
|
request->GetScriptLoadContext()->SetIsPreloadRequest();
|
|
request->mEarlyHintPreloaderId = aEarlyHintPreloaderId;
|
|
|
|
if (LOG_ENABLED()) {
|
|
nsAutoCString url;
|
|
aURI->GetAsciiSpec(url);
|
|
LOG(("ScriptLoadRequest (%p): Created preload request for %s",
|
|
request.get(), url.get()));
|
|
}
|
|
|
|
nsAutoString charset(aCharset);
|
|
nsresult rv = StartLoad(request, Some(charset));
|
|
if (NS_FAILED(rv)) {
|
|
return;
|
|
}
|
|
|
|
PreloadInfo* pi = mPreloads.AppendElement();
|
|
pi->mRequest = request;
|
|
pi->mCharset = aCharset;
|
|
}
|
|
|
|
void ScriptLoader::AddDeferRequest(ScriptLoadRequest* aRequest) {
|
|
MOZ_ASSERT(aRequest->GetScriptLoadContext()->IsDeferredScript());
|
|
MOZ_ASSERT(!aRequest->GetScriptLoadContext()->mInDeferList &&
|
|
!aRequest->GetScriptLoadContext()->mInAsyncList);
|
|
MOZ_ASSERT(!aRequest->GetScriptLoadContext()->mInCompilingList);
|
|
|
|
aRequest->GetScriptLoadContext()->mInDeferList = true;
|
|
mDeferRequests.AppendElement(aRequest);
|
|
if (mDeferEnabled && aRequest == mDeferRequests.getFirst() && mDocument &&
|
|
!mBlockingDOMContentLoaded) {
|
|
MOZ_ASSERT(mDocument->GetReadyStateEnum() == Document::READYSTATE_LOADING);
|
|
mBlockingDOMContentLoaded = true;
|
|
mDocument->BlockDOMContentLoaded();
|
|
}
|
|
}
|
|
|
|
void ScriptLoader::AddAsyncRequest(ScriptLoadRequest* aRequest) {
|
|
MOZ_ASSERT(aRequest->GetScriptLoadContext()->IsAsyncScript());
|
|
MOZ_ASSERT(!aRequest->GetScriptLoadContext()->mInDeferList &&
|
|
!aRequest->GetScriptLoadContext()->mInAsyncList);
|
|
MOZ_ASSERT(!aRequest->GetScriptLoadContext()->mInCompilingList);
|
|
|
|
aRequest->GetScriptLoadContext()->mInAsyncList = true;
|
|
if (aRequest->IsFinished()) {
|
|
mLoadedAsyncRequests.AppendElement(aRequest);
|
|
} else {
|
|
mLoadingAsyncRequests.AppendElement(aRequest);
|
|
}
|
|
}
|
|
|
|
void ScriptLoader::MaybeMoveToLoadedList(ScriptLoadRequest* aRequest) {
|
|
MOZ_ASSERT(aRequest->IsFinished());
|
|
MOZ_ASSERT(aRequest->IsTopLevel());
|
|
|
|
// If it's async, move it to the loaded list.
|
|
// aRequest->GetScriptLoadContext()->mInAsyncList really _should_ be in a
|
|
// list, but the consequences if it's not are bad enough we want to avoid
|
|
// trying to move it if it's not.
|
|
if (aRequest->GetScriptLoadContext()->mInAsyncList) {
|
|
MOZ_ASSERT(aRequest->isInList());
|
|
if (aRequest->isInList()) {
|
|
RefPtr<ScriptLoadRequest> req = mLoadingAsyncRequests.Steal(aRequest);
|
|
mLoadedAsyncRequests.AppendElement(req);
|
|
}
|
|
} else if (aRequest->IsModuleRequest() &&
|
|
aRequest->AsModuleRequest()->IsDynamicImport()) {
|
|
// Process dynamic imports with async scripts.
|
|
MOZ_ASSERT(!aRequest->isInList());
|
|
mLoadedAsyncRequests.AppendElement(aRequest);
|
|
}
|
|
}
|
|
|
|
bool ScriptLoader::MaybeRemovedDeferRequests() {
|
|
if (mDeferRequests.isEmpty() && mDocument && mBlockingDOMContentLoaded) {
|
|
mBlockingDOMContentLoaded = false;
|
|
mDocument->UnblockDOMContentLoaded();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
DocGroup* ScriptLoader::GetDocGroup() const { return mDocument->GetDocGroup(); }
|
|
|
|
void ScriptLoader::BeginDeferringScripts() {
|
|
mDeferEnabled = true;
|
|
if (mDeferCheckpointReached) {
|
|
// We already completed a parse and were just waiting for some async
|
|
// scripts to load (and were already blocking the load event waiting for
|
|
// that to happen), when document.open() happened and now we're doing a
|
|
// new parse. We shouldn't block the load event again, but _should_ reset
|
|
// mDeferCheckpointReached to false. It'll get set to true again when the
|
|
// DeferCheckpointReached call that corresponds to this
|
|
// BeginDeferringScripts call happens (on document.close()), since we just
|
|
// set mDeferEnabled to true.
|
|
mDeferCheckpointReached = false;
|
|
} else {
|
|
if (mDocument) {
|
|
mDocument->BlockOnload();
|
|
}
|
|
}
|
|
}
|
|
|
|
nsAutoScriptLoaderDisabler::nsAutoScriptLoaderDisabler(Document* aDoc) {
|
|
mLoader = aDoc->ScriptLoader();
|
|
mWasEnabled = mLoader->GetEnabled();
|
|
if (mWasEnabled) {
|
|
mLoader->SetEnabled(false);
|
|
}
|
|
}
|
|
|
|
nsAutoScriptLoaderDisabler::~nsAutoScriptLoaderDisabler() {
|
|
if (mWasEnabled) {
|
|
mLoader->SetEnabled(true);
|
|
}
|
|
}
|
|
|
|
#undef TRACE_FOR_TEST
|
|
#undef TRACE_FOR_TEST_BOOL
|
|
#undef TRACE_FOR_TEST_NONE
|
|
|
|
#undef LOG
|
|
|
|
} // namespace mozilla::dom
|