forked from mirrors/gecko-dev
3081 lines
101 KiB
C++
3081 lines
101 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 "ScriptLoadRequest.h"
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#include "ScriptTrace.h"
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#include "ModuleLoadRequest.h"
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#include "ModuleScript.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/Utility.h"
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#include "xpcpublic.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/DocGroup.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "mozilla/dom/SRILogHelper.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 "nsIScriptSecurityManager.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 "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 "nsIDOMHTMLScriptElement.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 "nsAutoPtr.h"
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#include "nsIXPConnect.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 "mozilla/ConsoleReportCollector.h"
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#include "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/Telemetry.h"
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#include "mozilla/TimeStamp.h"
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#include "mozilla/Unused.h"
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#include "nsIScriptError.h"
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#include "nsIOutputStream.h"
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using JS::SourceBufferHolder;
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namespace mozilla {
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namespace dom {
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LazyLogModule ScriptLoader::gCspPRLog("CSP");
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LazyLogModule ScriptLoader::gScriptLoaderLog("ScriptLoader");
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#define LOG(args) \
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MOZ_LOG(gScriptLoaderLog, mozilla::LogLevel::Debug, args)
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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 NS_NAMED_LITERAL_CSTRING(kNullMimeType, "javascript/null");
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//////////////////////////////////////////////////////////////
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// ScriptLoader::PreloadInfo
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//////////////////////////////////////////////////////////////
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inline void
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ImplCycleCollectionUnlink(ScriptLoader::PreloadInfo& aField)
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{
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ImplCycleCollectionUnlink(aField.mRequest);
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}
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inline void
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ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& aCallback,
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ScriptLoader::PreloadInfo& aField,
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const char* aName,
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uint32_t aFlags = 0)
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{
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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,
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mNonAsyncExternalScriptInsertedRequests,
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mLoadingAsyncRequests,
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mLoadedAsyncRequests,
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mDeferRequests,
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mXSLTRequests,
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mParserBlockingRequest,
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mPreloads,
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mPendingChildLoaders,
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mFetchedModules)
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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(nsIDocument *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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mEnabled(true),
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mDeferEnabled(false),
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mDocumentParsingDone(false),
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mBlockingDOMContentLoaded(false),
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mLoadEventFired(false),
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mReporter(new ConsoleReportCollector())
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{
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}
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ScriptLoader::~ScriptLoader()
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{
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mObservers.Clear();
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if (mParserBlockingRequest) {
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mParserBlockingRequest->FireScriptAvailable(NS_ERROR_ABORT);
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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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req->FireScriptAvailable(NS_ERROR_ABORT);
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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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req->FireScriptAvailable(NS_ERROR_ABORT);
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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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req->FireScriptAvailable(NS_ERROR_ABORT);
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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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req->FireScriptAvailable(NS_ERROR_ABORT);
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}
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for(ScriptLoadRequest* req = mNonAsyncExternalScriptInsertedRequests.getFirst();
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req;
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req = req->getNext()) {
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req->FireScriptAvailable(NS_ERROR_ABORT);
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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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}
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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
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CollectScriptTelemetry(nsIIncrementalStreamLoader* aLoader,
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ScriptLoadRequest* aRequest)
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{
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using namespace mozilla::Telemetry;
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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 type of source, as well as the size of the source.
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if (aRequest->IsLoadingSource()) {
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if (aRequest->mIsInline) {
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AccumulateCategorical(LABELS_DOM_SCRIPT_LOADING_SOURCE::Inline);
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nsAutoString inlineData;
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aRequest->mElement->GetScriptText(inlineData);
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Accumulate(DOM_SCRIPT_INLINE_SIZE, inlineData.Length());
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} else {
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AccumulateCategorical(LABELS_DOM_SCRIPT_LOADING_SOURCE::SourceFallback);
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Accumulate(DOM_SCRIPT_SOURCE_SIZE, aRequest->mScriptText.length());
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}
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} else {
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MOZ_ASSERT(aRequest->IsLoading());
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if (aRequest->IsSource()) {
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AccumulateCategorical(LABELS_DOM_SCRIPT_LOADING_SOURCE::Source);
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Accumulate(DOM_SCRIPT_SOURCE_SIZE, aRequest->mScriptText.length());
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} else {
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MOZ_ASSERT(aRequest->IsBytecode());
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AccumulateCategorical(LABELS_DOM_SCRIPT_LOADING_SOURCE::AltData);
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Accumulate(DOM_SCRIPT_BYTECODE_SIZE, aRequest->mScriptBytecode.length());
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}
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}
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// Skip if we do not have any cache information for the given script.
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if (!aLoader) {
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return;
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}
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nsCOMPtr<nsIRequest> channel;
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aLoader->GetRequest(getter_AddRefs(channel));
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nsCOMPtr<nsICacheInfoChannel> cic(do_QueryInterface(channel));
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if (!cic) {
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return;
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}
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int32_t fetchCount = 0;
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if (NS_SUCCEEDED(cic->GetCacheTokenFetchCount(&fetchCount))) {
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Accumulate(DOM_SCRIPT_FETCH_COUNT, fetchCount);
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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
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IsScriptEventHandler(nsIContent* aScriptElement)
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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->GetAttr(kNameSpaceID_None, nsGkAtoms::_for, forAttr) ||
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!aScriptElement->GetAttr(kNameSpaceID_None, 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, NS_LITERAL_STRING("onload"),
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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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nsresult
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ScriptLoader::CheckContentPolicy(nsIDocument* aDocument,
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nsISupports* aContext,
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nsIURI* aURI,
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const nsAString& aType,
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bool aIsPreLoad)
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{
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nsContentPolicyType contentPolicyType = aIsPreLoad
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? nsIContentPolicy::TYPE_INTERNAL_SCRIPT_PRELOAD
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: nsIContentPolicy::TYPE_INTERNAL_SCRIPT;
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int16_t shouldLoad = nsIContentPolicy::ACCEPT;
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nsresult rv = NS_CheckContentLoadPolicy(contentPolicyType,
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aURI,
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aDocument->NodePrincipal(),
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aContext,
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NS_LossyConvertUTF16toASCII(aType),
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nullptr, //extra
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&shouldLoad,
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nsContentUtils::GetContentPolicy(),
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nsContentUtils::GetSecurityManager());
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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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bool
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ScriptLoader::ModuleScriptsEnabled()
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{
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static bool sEnabledForContent = false;
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static bool sCachedPref = false;
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if (!sCachedPref) {
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sCachedPref = true;
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Preferences::AddBoolVarCache(&sEnabledForContent, "dom.moduleScripts.enabled", false);
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}
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return nsContentUtils::IsChromeDoc(mDocument) || sEnabledForContent;
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}
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bool
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ScriptLoader::ModuleMapContainsModule(ModuleLoadRequest* aRequest) const
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{
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// Returns whether we have fetched, or are currently fetching, a module script
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// for the request's URL.
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return mFetchingModules.Contains(aRequest->mURI) ||
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mFetchedModules.Contains(aRequest->mURI);
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}
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bool
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ScriptLoader::IsFetchingModule(ModuleLoadRequest* aRequest) const
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{
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bool fetching = mFetchingModules.Contains(aRequest->mURI);
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MOZ_ASSERT_IF(fetching, !mFetchedModules.Contains(aRequest->mURI));
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return fetching;
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}
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void
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ScriptLoader::SetModuleFetchStarted(ModuleLoadRequest* aRequest)
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{
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// Update the module map to indicate that a module is currently being fetched.
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MOZ_ASSERT(aRequest->IsLoading());
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MOZ_ASSERT(!ModuleMapContainsModule(aRequest));
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mFetchingModules.Put(aRequest->mURI, nullptr);
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}
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void
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ScriptLoader::SetModuleFetchFinishedAndResumeWaitingRequests(ModuleLoadRequest* aRequest,
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nsresult aResult)
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{
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// Update module map with the result of fetching a single module script. The
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// module script pointer is nullptr on error.
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MOZ_ASSERT(!aRequest->IsReadyToRun());
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RefPtr<GenericPromise::Private> promise;
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MOZ_ALWAYS_TRUE(mFetchingModules.Remove(aRequest->mURI, getter_AddRefs(promise)));
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RefPtr<ModuleScript> ms(aRequest->mModuleScript);
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MOZ_ASSERT(NS_SUCCEEDED(aResult) == (ms != nullptr));
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mFetchedModules.Put(aRequest->mURI, ms);
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if (promise) {
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if (ms) {
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promise->Resolve(true, __func__);
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} else {
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promise->Reject(aResult, __func__);
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}
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}
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}
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RefPtr<GenericPromise>
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ScriptLoader::WaitForModuleFetch(ModuleLoadRequest* aRequest)
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{
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MOZ_ASSERT(ModuleMapContainsModule(aRequest));
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if (auto entry = mFetchingModules.Lookup(aRequest->mURI)) {
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if (!entry.Data()) {
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entry.Data() = new GenericPromise::Private(__func__);
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}
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return entry.Data();
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}
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RefPtr<ModuleScript> ms;
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MOZ_ALWAYS_TRUE(mFetchedModules.Get(aRequest->mURI, getter_AddRefs(ms)));
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if (!ms || ms->InstantiationFailed()) {
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return GenericPromise::CreateAndReject(NS_ERROR_FAILURE, __func__);
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}
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return GenericPromise::CreateAndResolve(true, __func__);
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}
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ModuleScript*
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ScriptLoader::GetFetchedModule(nsIURI* aURL) const
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{
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bool found;
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ModuleScript* ms = mFetchedModules.GetWeak(aURL, &found);
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MOZ_ASSERT(found);
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return ms;
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}
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nsresult
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ScriptLoader::ProcessFetchedModuleSource(ModuleLoadRequest* aRequest)
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{
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MOZ_ASSERT(!aRequest->mModuleScript);
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nsresult rv = CreateModuleScript(aRequest);
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SetModuleFetchFinishedAndResumeWaitingRequests(aRequest, rv);
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aRequest->mScriptText.clearAndFree();
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if (NS_SUCCEEDED(rv)) {
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StartFetchingModuleDependencies(aRequest);
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}
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return rv;
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}
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nsresult
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ScriptLoader::CreateModuleScript(ModuleLoadRequest* aRequest)
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{
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MOZ_ASSERT(!aRequest->mModuleScript);
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MOZ_ASSERT(aRequest->mBaseURL);
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nsCOMPtr<nsIScriptGlobalObject> globalObject = GetScriptGlobalObject();
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if (!globalObject) {
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return NS_ERROR_FAILURE;
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}
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nsCOMPtr<nsIScriptContext> context = globalObject->GetScriptContext();
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if (!context) {
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return NS_ERROR_FAILURE;
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}
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nsAutoMicroTask mt;
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AutoEntryScript aes(globalObject, "CompileModule", true);
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bool oldProcessingScriptTag = context->GetProcessingScriptTag();
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context->SetProcessingScriptTag(true);
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nsresult rv;
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{
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// Update our current script.
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AutoCurrentScriptUpdater scriptUpdater(this, aRequest->mElement);
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JSContext* cx = aes.cx();
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JS::Rooted<JSObject*> module(cx);
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if (aRequest->mWasCompiledOMT) {
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module = JS::FinishOffThreadModule(cx, aRequest->mOffThreadToken);
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aRequest->mOffThreadToken = nullptr;
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rv = module ? NS_OK : NS_ERROR_FAILURE;
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} else {
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JS::Rooted<JSObject*> global(cx, globalObject->GetGlobalJSObject());
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JS::CompileOptions options(cx);
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rv = FillCompileOptionsForRequest(aes, aRequest, global, &options);
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if (NS_SUCCEEDED(rv)) {
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nsAutoString inlineData;
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SourceBufferHolder srcBuf = GetScriptSource(aRequest, inlineData);
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rv = nsJSUtils::CompileModule(cx, srcBuf, global, options, &module);
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}
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}
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MOZ_ASSERT(NS_SUCCEEDED(rv) == (module != nullptr));
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if (module) {
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aRequest->mModuleScript =
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new ModuleScript(this, aRequest->mBaseURL, module);
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}
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}
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context->SetProcessingScriptTag(oldProcessingScriptTag);
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return rv;
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}
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static bool
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ThrowTypeError(JSContext* aCx, ModuleScript* aScript,
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const nsString& aMessage)
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{
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JS::Rooted<JSObject*> module(aCx, aScript->ModuleRecord());
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JS::Rooted<JSScript*> script(aCx, JS::GetModuleScript(aCx, module));
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JS::Rooted<JSString*> filename(aCx);
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filename = JS_NewStringCopyZ(aCx, JS_GetScriptFilename(script));
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if (!filename) {
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return false;
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}
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JS::Rooted<JSString*> message(aCx, JS_NewUCStringCopyZ(aCx, aMessage.get()));
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if (!message) {
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return false;
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}
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JS::Rooted<JS::Value> error(aCx);
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if (!JS::CreateError(aCx, JSEXN_TYPEERR, nullptr, filename, 0, 0, nullptr,
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message, &error)) {
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return false;
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}
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JS_SetPendingException(aCx, error);
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return false;
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}
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static bool
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HandleResolveFailure(JSContext* aCx, ModuleScript* aScript,
|
|
const nsAString& aSpecifier)
|
|
{
|
|
// TODO: How can we get the line number of the failed import?
|
|
|
|
nsAutoString message(NS_LITERAL_STRING("Error resolving module specifier: "));
|
|
message.Append(aSpecifier);
|
|
|
|
return ThrowTypeError(aCx, aScript, message);
|
|
}
|
|
|
|
static bool
|
|
HandleModuleNotFound(JSContext* aCx, ModuleScript* aScript,
|
|
const nsAString& aSpecifier)
|
|
{
|
|
// TODO: How can we get the line number of the failed import?
|
|
|
|
nsAutoString message(NS_LITERAL_STRING("Resolved module not found in map: "));
|
|
message.Append(aSpecifier);
|
|
|
|
return ThrowTypeError(aCx, aScript, message);
|
|
}
|
|
|
|
static already_AddRefed<nsIURI>
|
|
ResolveModuleSpecifier(ModuleScript* aScript,
|
|
const nsAString& aSpecifier)
|
|
{
|
|
// The following module specifiers are allowed by the spec:
|
|
// - a valid absolute URL
|
|
// - a valid relative URL that starts with "/", "./" or "../"
|
|
//
|
|
// Bareword module specifiers are currently disallowed as these may be given
|
|
// special meanings in the future.
|
|
|
|
nsCOMPtr<nsIURI> uri;
|
|
nsresult rv = NS_NewURI(getter_AddRefs(uri), aSpecifier);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return uri.forget();
|
|
}
|
|
|
|
if (rv != NS_ERROR_MALFORMED_URI) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (!StringBeginsWith(aSpecifier, NS_LITERAL_STRING("/")) &&
|
|
!StringBeginsWith(aSpecifier, NS_LITERAL_STRING("./")) &&
|
|
!StringBeginsWith(aSpecifier, NS_LITERAL_STRING("../"))) {
|
|
return nullptr;
|
|
}
|
|
|
|
rv = NS_NewURI(getter_AddRefs(uri), aSpecifier, nullptr, aScript->BaseURL());
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return uri.forget();
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
static nsresult
|
|
RequestedModuleIsInAncestorList(ModuleLoadRequest* aRequest, nsIURI* aURL, bool* aResult)
|
|
{
|
|
const size_t ImportDepthLimit = 100;
|
|
|
|
*aResult = false;
|
|
size_t depth = 0;
|
|
while (aRequest) {
|
|
if (depth++ == ImportDepthLimit) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
bool equal;
|
|
nsresult rv = aURL->Equals(aRequest->mURI, &equal);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (equal) {
|
|
*aResult = true;
|
|
return NS_OK;
|
|
}
|
|
|
|
aRequest = aRequest->mParent;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
static nsresult
|
|
ResolveRequestedModules(ModuleLoadRequest* aRequest, nsCOMArray<nsIURI>& aUrls)
|
|
{
|
|
ModuleScript* ms = aRequest->mModuleScript;
|
|
|
|
AutoJSAPI jsapi;
|
|
if (!jsapi.Init(ms->ModuleRecord())) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JSContext* cx = jsapi.cx();
|
|
JS::Rooted<JSObject*> moduleRecord(cx, ms->ModuleRecord());
|
|
JS::Rooted<JSObject*> specifiers(cx, JS::GetRequestedModules(cx, moduleRecord));
|
|
|
|
uint32_t length;
|
|
if (!JS_GetArrayLength(cx, specifiers, &length)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JS::Rooted<JS::Value> val(cx);
|
|
for (uint32_t i = 0; i < length; i++) {
|
|
if (!JS_GetElement(cx, specifiers, i, &val)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsAutoJSString specifier;
|
|
if (!specifier.init(cx, val)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Let url be the result of resolving a module specifier given module script and requested.
|
|
ModuleScript* ms = aRequest->mModuleScript;
|
|
nsCOMPtr<nsIURI> uri = ResolveModuleSpecifier(ms, specifier);
|
|
if (!uri) {
|
|
HandleResolveFailure(cx, ms, specifier);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
bool isAncestor;
|
|
nsresult rv = RequestedModuleIsInAncestorList(aRequest, uri, &isAncestor);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (!isAncestor) {
|
|
aUrls.AppendElement(uri.forget());
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
ScriptLoader::StartFetchingModuleDependencies(ModuleLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT(aRequest->mModuleScript);
|
|
MOZ_ASSERT(!aRequest->mModuleScript->InstantiationFailed());
|
|
MOZ_ASSERT(!aRequest->IsReadyToRun());
|
|
aRequest->mProgress = ModuleLoadRequest::Progress::FetchingImports;
|
|
|
|
nsCOMArray<nsIURI> urls;
|
|
nsresult rv = ResolveRequestedModules(aRequest, urls);
|
|
if (NS_FAILED(rv)) {
|
|
aRequest->LoadFailed();
|
|
return;
|
|
}
|
|
|
|
if (urls.Length() == 0) {
|
|
// There are no descendents to load so this request is ready.
|
|
aRequest->DependenciesLoaded();
|
|
return;
|
|
}
|
|
|
|
// For each url in urls, fetch a module script tree given url, module script's
|
|
// CORS setting, and module script's settings object.
|
|
nsTArray<RefPtr<GenericPromise>> importsReady;
|
|
for (size_t i = 0; i < urls.Length(); i++) {
|
|
RefPtr<GenericPromise> childReady =
|
|
StartFetchingModuleAndDependencies(aRequest, urls[i]);
|
|
importsReady.AppendElement(childReady);
|
|
}
|
|
|
|
// Wait for all imports to become ready.
|
|
RefPtr<GenericPromise::AllPromiseType> allReady =
|
|
GenericPromise::All(GetMainThreadSerialEventTarget(), importsReady);
|
|
allReady->Then(GetMainThreadSerialEventTarget(), __func__, aRequest,
|
|
&ModuleLoadRequest::DependenciesLoaded,
|
|
&ModuleLoadRequest::LoadFailed);
|
|
}
|
|
|
|
RefPtr<GenericPromise>
|
|
ScriptLoader::StartFetchingModuleAndDependencies(ModuleLoadRequest* aRequest,
|
|
nsIURI* aURI)
|
|
{
|
|
MOZ_ASSERT(aURI);
|
|
|
|
RefPtr<ModuleLoadRequest> childRequest =
|
|
new ModuleLoadRequest(aRequest->mElement, aRequest->mJSVersion,
|
|
aRequest->mCORSMode, aRequest->mIntegrity, this);
|
|
|
|
childRequest->mIsTopLevel = false;
|
|
childRequest->mURI = aURI;
|
|
childRequest->mIsInline = false;
|
|
childRequest->mReferrerPolicy = aRequest->mReferrerPolicy;
|
|
childRequest->mParent = aRequest;
|
|
|
|
RefPtr<GenericPromise> ready = childRequest->mReady.Ensure(__func__);
|
|
|
|
nsresult rv = StartLoad(childRequest);
|
|
if (NS_FAILED(rv)) {
|
|
childRequest->mReady.Reject(rv, __func__);
|
|
return ready;
|
|
}
|
|
|
|
aRequest->mImports.AppendElement(childRequest);
|
|
return ready;
|
|
}
|
|
|
|
bool
|
|
HostResolveImportedModule(JSContext* aCx, unsigned argc, JS::Value* vp)
|
|
{
|
|
MOZ_ASSERT(argc == 2);
|
|
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
|
|
JS::Rooted<JSObject*> module(aCx, &args[0].toObject());
|
|
JS::Rooted<JSString*> specifier(aCx, args[1].toString());
|
|
|
|
// Let referencing module script be referencingModule.[[HostDefined]].
|
|
JS::Value value = JS::GetModuleHostDefinedField(module);
|
|
auto script = static_cast<ModuleScript*>(value.toPrivate());
|
|
MOZ_ASSERT(script->ModuleRecord() == module);
|
|
|
|
// Let url be the result of resolving a module specifier given referencing
|
|
// module script and specifier. If the result is failure, throw a TypeError
|
|
// exception and abort these steps.
|
|
nsAutoJSString string;
|
|
if (!string.init(aCx, specifier)) {
|
|
return false;
|
|
}
|
|
|
|
nsCOMPtr<nsIURI> uri = ResolveModuleSpecifier(script, string);
|
|
if (!uri) {
|
|
return HandleResolveFailure(aCx, script, string);
|
|
}
|
|
|
|
// Let resolved module script be the value of the entry in module map whose
|
|
// key is url. If no such entry exists, throw a TypeError exception and abort
|
|
// these steps.
|
|
ModuleScript* ms = script->Loader()->GetFetchedModule(uri);
|
|
if (!ms) {
|
|
return HandleModuleNotFound(aCx, script, string);
|
|
}
|
|
|
|
if (ms->InstantiationFailed()) {
|
|
JS::Rooted<JS::Value> exception(aCx, ms->Exception());
|
|
JS_SetPendingException(aCx, exception);
|
|
return false;
|
|
}
|
|
|
|
*vp = JS::ObjectValue(*ms->ModuleRecord());
|
|
return true;
|
|
}
|
|
|
|
static nsresult
|
|
EnsureModuleResolveHook(JSContext* aCx)
|
|
{
|
|
if (JS::GetModuleResolveHook(aCx)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
JS::Rooted<JSFunction*> func(aCx);
|
|
func = JS_NewFunction(aCx, HostResolveImportedModule, 2, 0,
|
|
"HostResolveImportedModule");
|
|
if (!func) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JS::SetModuleResolveHook(aCx, func);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
ScriptLoader::ProcessLoadedModuleTree(ModuleLoadRequest* aRequest)
|
|
{
|
|
if (aRequest->IsTopLevel()) {
|
|
MaybeMoveToLoadedList(aRequest);
|
|
ProcessPendingRequests();
|
|
}
|
|
|
|
if (aRequest->mWasCompiledOMT) {
|
|
mDocument->UnblockOnload(false);
|
|
}
|
|
}
|
|
|
|
bool
|
|
ScriptLoader::InstantiateModuleTree(ModuleLoadRequest* aRequest)
|
|
{
|
|
// Perform eager instantiation of the loaded module tree.
|
|
|
|
MOZ_ASSERT(aRequest);
|
|
|
|
ModuleScript* ms = aRequest->mModuleScript;
|
|
MOZ_ASSERT(ms);
|
|
if (!ms->ModuleRecord()) {
|
|
return false;
|
|
}
|
|
|
|
AutoJSAPI jsapi;
|
|
if (NS_WARN_IF(!jsapi.Init(ms->ModuleRecord()))) {
|
|
return false;
|
|
}
|
|
|
|
nsresult rv = EnsureModuleResolveHook(jsapi.cx());
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
|
|
JS::Rooted<JSObject*> module(jsapi.cx(), ms->ModuleRecord());
|
|
bool ok = NS_SUCCEEDED(nsJSUtils::ModuleDeclarationInstantiation(jsapi.cx(), module));
|
|
|
|
JS::RootedValue exception(jsapi.cx());
|
|
if (!ok) {
|
|
MOZ_ASSERT(jsapi.HasException());
|
|
if (!jsapi.StealException(&exception)) {
|
|
return false;
|
|
}
|
|
MOZ_ASSERT(!exception.isUndefined());
|
|
}
|
|
|
|
// Mark this module and any uninstantiated dependencies found via depth-first
|
|
// search as instantiated and record any error.
|
|
|
|
mozilla::Vector<ModuleLoadRequest*, 1> requests;
|
|
if (!requests.append(aRequest)) {
|
|
return false;
|
|
}
|
|
|
|
while (!requests.empty()) {
|
|
ModuleLoadRequest* request = requests.popCopy();
|
|
ModuleScript* ms = request->mModuleScript;
|
|
if (!ms->IsUninstantiated()) {
|
|
continue;
|
|
}
|
|
|
|
ms->SetInstantiationResult(exception);
|
|
|
|
for (auto import : request->mImports) {
|
|
if (import->mModuleScript->IsUninstantiated() &&
|
|
!requests.append(import))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
nsresult
|
|
ScriptLoader::RestartLoad(ScriptLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT(aRequest->IsBytecode());
|
|
aRequest->mScriptBytecode.clearAndFree();
|
|
TRACE_FOR_TEST(aRequest->mElement, "scriptloader_fallback");
|
|
|
|
// Start a new channel from which we explicitly request to stream the source
|
|
// instead of the bytecode.
|
|
aRequest->mProgress = ScriptLoadRequest::Progress::Loading_Source;
|
|
nsresult rv = StartLoad(aRequest);
|
|
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)
|
|
{
|
|
MOZ_ASSERT(aRequest->IsLoading());
|
|
NS_ENSURE_TRUE(mDocument, NS_ERROR_NULL_POINTER);
|
|
aRequest->mDataType = ScriptLoadRequest::DataType::Unknown;
|
|
|
|
// If this document is sandboxed without 'allow-scripts', abort.
|
|
if (mDocument->HasScriptsBlockedBySandbox()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
// Check whether the module has been fetched or is currently being fetched,
|
|
// and if so wait for it.
|
|
ModuleLoadRequest* request = aRequest->AsModuleRequest();
|
|
if (ModuleMapContainsModule(request)) {
|
|
WaitForModuleFetch(request)
|
|
->Then(GetMainThreadSerialEventTarget(), __func__, request,
|
|
&ModuleLoadRequest::ModuleLoaded,
|
|
&ModuleLoadRequest::LoadFailed);
|
|
return NS_OK;
|
|
}
|
|
|
|
// Otherwise put the URL in the module map and mark it as fetching.
|
|
SetModuleFetchStarted(request);
|
|
}
|
|
|
|
nsContentPolicyType contentPolicyType = aRequest->IsPreload()
|
|
? nsIContentPolicy::TYPE_INTERNAL_SCRIPT_PRELOAD
|
|
: nsIContentPolicy::TYPE_INTERNAL_SCRIPT;
|
|
nsCOMPtr<nsINode> context;
|
|
if (aRequest->mElement) {
|
|
context = do_QueryInterface(aRequest->mElement);
|
|
}
|
|
else {
|
|
context = mDocument;
|
|
}
|
|
|
|
nsCOMPtr<nsILoadGroup> loadGroup = mDocument->GetDocumentLoadGroup();
|
|
nsCOMPtr<nsPIDOMWindowOuter> window = mDocument->GetWindow();
|
|
NS_ENSURE_TRUE(window, NS_ERROR_NULL_POINTER);
|
|
nsIDocShell* docshell = window->GetDocShell();
|
|
nsCOMPtr<nsIInterfaceRequestor> prompter(do_QueryInterface(docshell));
|
|
|
|
nsSecurityFlags securityFlags;
|
|
if (aRequest->IsModuleRequest()) {
|
|
// According to the spec, module scripts have different behaviour to classic
|
|
// scripts and always use CORS.
|
|
securityFlags = nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS;
|
|
if (aRequest->mCORSMode == CORS_NONE) {
|
|
securityFlags |= nsILoadInfo::SEC_COOKIES_OMIT;
|
|
} else if (aRequest->mCORSMode == CORS_ANONYMOUS) {
|
|
securityFlags |= nsILoadInfo::SEC_COOKIES_SAME_ORIGIN;
|
|
} else {
|
|
MOZ_ASSERT(aRequest->mCORSMode == CORS_USE_CREDENTIALS);
|
|
securityFlags |= nsILoadInfo::SEC_COOKIES_INCLUDE;
|
|
}
|
|
} else {
|
|
securityFlags = aRequest->mCORSMode == CORS_NONE
|
|
? nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL
|
|
: nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS;
|
|
if (aRequest->mCORSMode == CORS_ANONYMOUS) {
|
|
securityFlags |= nsILoadInfo::SEC_COOKIES_SAME_ORIGIN;
|
|
} else if (aRequest->mCORSMode == CORS_USE_CREDENTIALS) {
|
|
securityFlags |= nsILoadInfo::SEC_COOKIES_INCLUDE;
|
|
}
|
|
}
|
|
securityFlags |= nsILoadInfo::SEC_ALLOW_CHROME;
|
|
|
|
nsCOMPtr<nsIChannel> channel;
|
|
nsresult rv = NS_NewChannel(getter_AddRefs(channel),
|
|
aRequest->mURI,
|
|
context,
|
|
securityFlags,
|
|
contentPolicyType,
|
|
loadGroup,
|
|
prompter,
|
|
nsIRequest::LOAD_NORMAL |
|
|
nsIChannel::LOAD_CLASSIFY_URI);
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// To avoid decoding issues, the JSVersion is explicitly guarded here, and the
|
|
// build-id is part of the JSBytecodeMimeType constant.
|
|
aRequest->mCacheInfo = nullptr;
|
|
nsCOMPtr<nsICacheInfoChannel> cic(do_QueryInterface(channel));
|
|
if (cic && nsContentUtils::IsBytecodeCacheEnabled() &&
|
|
aRequest->mJSVersion == JSVERSION_DEFAULT) {
|
|
if (!aRequest->IsLoadingSource()) {
|
|
// 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(nsContentUtils::JSBytecodeMimeType());
|
|
} 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);
|
|
}
|
|
}
|
|
|
|
nsIScriptElement* script = aRequest->mElement;
|
|
nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(channel));
|
|
|
|
if (cos) {
|
|
if (aRequest->mScriptFromHead &&
|
|
!(script && (script->GetScriptAsync() || script->GetScriptDeferred()))) {
|
|
// synchronous head scripts block loading of most other non js/css
|
|
// content such as images
|
|
cos->AddClassFlags(nsIClassOfService::Leader);
|
|
} else if (!(script && script->GetScriptDeferred())) {
|
|
// other scripts are neither blocked nor prioritized unless marked deferred
|
|
cos->AddClassFlags(nsIClassOfService::Unblocked);
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
|
|
if (httpChannel) {
|
|
// HTTP content negotation has little value in this context.
|
|
rv = httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("Accept"),
|
|
NS_LITERAL_CSTRING("*/*"),
|
|
false);
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
|
rv = httpChannel->SetReferrerWithPolicy(mDocument->GetDocumentURI(),
|
|
aRequest->mReferrerPolicy);
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
|
|
|
nsCOMPtr<nsIHttpChannelInternal> internalChannel(do_QueryInterface(httpChannel));
|
|
if (internalChannel) {
|
|
rv = internalChannel->SetIntegrityMetadata(aRequest->mIntegrity.GetIntegrityString());
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
|
}
|
|
}
|
|
|
|
mozilla::net::PredictorLearn(aRequest->mURI, mDocument->GetDocumentURI(),
|
|
nsINetworkPredictor::LEARN_LOAD_SUBRESOURCE,
|
|
mDocument->NodePrincipal()->OriginAttributesRef());
|
|
|
|
// Set the initiator type
|
|
nsCOMPtr<nsITimedChannel> timedChannel(do_QueryInterface(httpChannel));
|
|
if (timedChannel) {
|
|
timedChannel->SetInitiatorType(NS_LITERAL_STRING("script"));
|
|
}
|
|
|
|
nsAutoPtr<mozilla::dom::SRICheckDataVerifier> sriDataVerifier;
|
|
if (!aRequest->mIntegrity.IsEmpty()) {
|
|
nsAutoCString sourceUri;
|
|
if (mDocument->GetDocumentURI()) {
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
sriDataVerifier = new SRICheckDataVerifier(aRequest->mIntegrity, sourceUri,
|
|
mReporter);
|
|
}
|
|
|
|
RefPtr<ScriptLoadHandler> handler =
|
|
new ScriptLoadHandler(this, aRequest, sriDataVerifier.forget());
|
|
|
|
nsCOMPtr<nsIIncrementalStreamLoader> loader;
|
|
rv = NS_NewIncrementalStreamLoader(getter_AddRefs(loader), handler);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return channel->AsyncOpen2(loader);
|
|
}
|
|
|
|
bool
|
|
ScriptLoader::PreloadURIComparator::Equals(const PreloadInfo& aPi,
|
|
nsIURI* const& aURI) const
|
|
{
|
|
bool same;
|
|
return NS_SUCCEEDED(aPi.mRequest->mURI->Equals(aURI, &same)) &&
|
|
same;
|
|
}
|
|
|
|
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);
|
|
}
|
|
};
|
|
|
|
static inline bool
|
|
ParseTypeAttribute(const nsAString& aType, JSVersion* aVersion)
|
|
{
|
|
MOZ_ASSERT(!aType.IsEmpty());
|
|
MOZ_ASSERT(aVersion);
|
|
MOZ_ASSERT(*aVersion == JSVERSION_DEFAULT);
|
|
|
|
nsContentTypeParser parser(aType);
|
|
|
|
nsAutoString mimeType;
|
|
nsresult rv = parser.GetType(mimeType);
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
|
|
if (!nsContentUtils::IsJavascriptMIMEType(mimeType)) {
|
|
return false;
|
|
}
|
|
|
|
// Get the version string, and ensure the language supports it.
|
|
nsAutoString versionName;
|
|
rv = parser.GetParameter("version", versionName);
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
*aVersion = nsContentUtils::ParseJavascriptVersion(versionName);
|
|
} else if (rv != NS_ERROR_INVALID_ARG) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
CSPAllowsInlineScript(nsIScriptElement* aElement, nsIDocument* aDocument)
|
|
{
|
|
nsCOMPtr<nsIContentSecurityPolicy> csp;
|
|
// Note: For imports NodePrincipal and the principal of the master are
|
|
// the same.
|
|
nsresult rv = aDocument->NodePrincipal()->GetCsp(getter_AddRefs(csp));
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
|
|
if (!csp) {
|
|
// no CSP --> allow
|
|
return true;
|
|
}
|
|
|
|
// query the nonce
|
|
nsCOMPtr<nsIContent> scriptContent = do_QueryInterface(aElement);
|
|
nsAutoString nonce;
|
|
scriptContent->GetAttr(kNameSpaceID_None, nsGkAtoms::nonce, nonce);
|
|
bool parserCreated = aElement->GetParserCreated() != mozilla::dom::NOT_FROM_PARSER;
|
|
|
|
// query the scripttext
|
|
nsAutoString scriptText;
|
|
aElement->GetScriptText(scriptText);
|
|
|
|
bool allowInlineScript = false;
|
|
rv = csp->GetAllowsInline(nsIContentPolicy::TYPE_SCRIPT,
|
|
nonce, parserCreated, scriptText,
|
|
aElement->GetScriptLineNumber(),
|
|
&allowInlineScript);
|
|
return allowInlineScript;
|
|
}
|
|
|
|
ScriptLoadRequest*
|
|
ScriptLoader::CreateLoadRequest(ScriptKind aKind,
|
|
nsIScriptElement* aElement,
|
|
uint32_t aVersion, CORSMode aCORSMode,
|
|
const SRIMetadata& aIntegrity)
|
|
{
|
|
if (aKind == ScriptKind::Classic) {
|
|
return new ScriptLoadRequest(aKind, aElement, aVersion, aCORSMode,
|
|
aIntegrity);
|
|
}
|
|
|
|
MOZ_ASSERT(aKind == ScriptKind::Module);
|
|
return new ModuleLoadRequest(aElement, aVersion, aCORSMode, aIntegrity, this);
|
|
}
|
|
|
|
bool
|
|
ScriptLoader::ProcessScriptElement(nsIScriptElement* aElement)
|
|
{
|
|
// 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);
|
|
|
|
// Step 13. Check that the script is not an eventhandler
|
|
if (IsScriptEventHandler(scriptContent)) {
|
|
return false;
|
|
}
|
|
|
|
JSVersion version = JSVERSION_DEFAULT;
|
|
|
|
// Check the type attribute to determine language and version.
|
|
// If type exists, it trumps the deprecated 'language='
|
|
nsAutoString type;
|
|
bool hasType = aElement->GetScriptType(type);
|
|
|
|
ScriptKind scriptKind = ScriptKind::Classic;
|
|
if (!type.IsEmpty()) {
|
|
if (ModuleScriptsEnabled() && type.LowerCaseEqualsASCII("module")) {
|
|
scriptKind = ScriptKind::Module;
|
|
} else {
|
|
NS_ENSURE_TRUE(ParseTypeAttribute(type, &version), false);
|
|
}
|
|
} else if (!hasType) {
|
|
// no 'type=' element
|
|
// "language" is a deprecated attribute of HTML, so we check it only for
|
|
// HTML script elements.
|
|
if (scriptContent->IsHTMLElement()) {
|
|
nsAutoString language;
|
|
scriptContent->GetAttr(kNameSpaceID_None, nsGkAtoms::language, language);
|
|
if (!language.IsEmpty()) {
|
|
if (!nsContentUtils::IsJavaScriptLanguage(language)) {
|
|
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 (ModuleScriptsEnabled() &&
|
|
scriptKind == ScriptKind::Classic &&
|
|
scriptContent->IsHTMLElement() &&
|
|
scriptContent->HasAttr(kNameSpaceID_None, nsGkAtoms::nomodule)) {
|
|
return false;
|
|
}
|
|
|
|
// Step 15. and later in the HTML5 spec
|
|
nsresult rv = NS_OK;
|
|
RefPtr<ScriptLoadRequest> request;
|
|
if (aElement->GetScriptExternal()) {
|
|
// external script
|
|
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;
|
|
}
|
|
|
|
// Double-check that the preload matches what we're asked to load now.
|
|
mozilla::net::ReferrerPolicy ourRefPolicy = mDocument->GetReferrerPolicy();
|
|
CORSMode ourCORSMode = aElement->GetCORSMode();
|
|
nsTArray<PreloadInfo>::index_type i =
|
|
mPreloads.IndexOf(scriptURI.get(), 0, PreloadURIComparator());
|
|
if (i != nsTArray<PreloadInfo>::NoIndex) {
|
|
// preloaded
|
|
// note that a script-inserted script can steal a preload!
|
|
request = mPreloads[i].mRequest;
|
|
request->mElement = aElement;
|
|
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);
|
|
if (elementCharset.Equals(preloadCharset) &&
|
|
ourCORSMode == request->mCORSMode &&
|
|
ourRefPolicy == request->mReferrerPolicy &&
|
|
scriptKind == request->mKind) {
|
|
rv = CheckContentPolicy(mDocument, aElement, request->mURI, type, false);
|
|
if (NS_FAILED(rv)) {
|
|
// 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();
|
|
return false;
|
|
}
|
|
} else {
|
|
// Drop the preload
|
|
request = nullptr;
|
|
}
|
|
}
|
|
|
|
if (!request) {
|
|
// no usable preload
|
|
|
|
SRIMetadata sriMetadata;
|
|
{
|
|
nsAutoString integrity;
|
|
scriptContent->GetAttr(kNameSpaceID_None, nsGkAtoms::integrity,
|
|
integrity);
|
|
if (!integrity.IsEmpty()) {
|
|
MOZ_LOG(SRILogHelper::GetSriLog(), mozilla::LogLevel::Debug,
|
|
("ScriptLoader::ProcessScriptElement, integrity=%s",
|
|
NS_ConvertUTF16toUTF8(integrity).get()));
|
|
nsAutoCString sourceUri;
|
|
if (mDocument->GetDocumentURI()) {
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
SRICheck::IntegrityMetadata(integrity, sourceUri, mReporter,
|
|
&sriMetadata);
|
|
}
|
|
}
|
|
|
|
request = CreateLoadRequest(scriptKind, aElement, version, ourCORSMode,
|
|
sriMetadata);
|
|
request->mURI = scriptURI;
|
|
request->mIsInline = false;
|
|
request->mReferrerPolicy = ourRefPolicy;
|
|
// keep request->mScriptFromHead to false so we don't treat non preloaded
|
|
// scripts as blockers for full page load. See bug 792438.
|
|
|
|
rv = StartLoad(request);
|
|
if (NS_FAILED(rv)) {
|
|
const char* message = "ScriptSourceLoadFailed";
|
|
|
|
if (rv == NS_ERROR_MALFORMED_URI) {
|
|
message = "ScriptSourceMalformed";
|
|
}
|
|
else if (rv == NS_ERROR_DOM_BAD_URI) {
|
|
message = "ScriptSourceNotAllowed";
|
|
}
|
|
|
|
NS_ConvertUTF8toUTF16 url(scriptURI->GetSpecOrDefault());
|
|
const char16_t* params[] = { url.get() };
|
|
|
|
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
|
|
NS_LITERAL_CSTRING("Script Loader"), mDocument,
|
|
nsContentUtils::eDOM_PROPERTIES, message,
|
|
params, ArrayLength(params), nullptr,
|
|
EmptyString(), aElement->GetScriptLineNumber());
|
|
|
|
// Asynchronously report the load failure
|
|
NS_DispatchToCurrentThread(
|
|
NewRunnableMethod("nsIScriptElement::FireErrorEvent",
|
|
aElement,
|
|
&nsIScriptElement::FireErrorEvent));
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Should still be in loading stage of script.
|
|
NS_ASSERTION(!request->InCompilingStage(),
|
|
"Request should not yet be in compiling stage.");
|
|
|
|
request->mJSVersion = version;
|
|
|
|
if (aElement->GetScriptAsync()) {
|
|
request->mIsAsync = true;
|
|
if (request->IsReadyToRun()) {
|
|
mLoadedAsyncRequests.AppendElement(request);
|
|
// 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();
|
|
} else {
|
|
mLoadingAsyncRequests.AppendElement(request);
|
|
}
|
|
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->mIsNonAsyncScriptInserted = true;
|
|
mNonAsyncExternalScriptInsertedRequests.AppendElement(request);
|
|
if (request->IsReadyToRun()) {
|
|
// 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 (aElement->GetScriptDeferred() || request->IsModuleRequest()) {
|
|
// 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. 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->mIsXSLT = true;
|
|
mXSLTRequests.AppendElement(request);
|
|
if (request->IsReadyToRun()) {
|
|
// The script is available already. Run it ASAP when the event
|
|
// loop gets a chance to spin.
|
|
ProcessPendingRequestsAsync();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
if (request->IsReadyToRun() && 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;
|
|
}
|
|
|
|
// inline script
|
|
// Is this document sandboxed without 'allow-scripts'?
|
|
if (mDocument->HasScriptsBlockedBySandbox()) {
|
|
return false;
|
|
}
|
|
|
|
// Does CSP allow this inline script to run?
|
|
if (!CSPAllowsInlineScript(aElement, mDocument)) {
|
|
return false;
|
|
}
|
|
|
|
// Inline scripts ignore ther CORS mode and are always CORS_NONE
|
|
request = CreateLoadRequest(scriptKind, aElement, version, CORS_NONE,
|
|
SRIMetadata()); // SRI doesn't apply
|
|
request->mJSVersion = version;
|
|
request->mIsInline = true;
|
|
request->mURI = mDocument->GetDocumentURI();
|
|
request->mLineNo = aElement->GetScriptLineNumber();
|
|
request->mProgress = ScriptLoadRequest::Progress::Loading_Source;
|
|
request->mDataType = ScriptLoadRequest::DataType::Source;
|
|
TRACE_FOR_TEST_BOOL(request->mElement, "scriptloader_load_source");
|
|
CollectScriptTelemetry(nullptr, request);
|
|
|
|
if (request->IsModuleRequest()) {
|
|
ModuleLoadRequest* modReq = request->AsModuleRequest();
|
|
modReq->mBaseURL = mDocument->GetDocBaseURI();
|
|
rv = CreateModuleScript(modReq);
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
StartFetchingModuleDependencies(modReq);
|
|
if (aElement->GetScriptAsync()) {
|
|
mLoadingAsyncRequests.AppendElement(request);
|
|
} else {
|
|
AddDeferRequest(request);
|
|
}
|
|
return false;
|
|
}
|
|
request->mProgress = ScriptLoadRequest::Progress::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?");
|
|
nsContentUtils::AddScriptRunner(new ScriptRequestProcessor(this,
|
|
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;
|
|
}
|
|
|
|
namespace {
|
|
|
|
class NotifyOffThreadScriptLoadCompletedRunnable : public Runnable
|
|
{
|
|
RefPtr<ScriptLoadRequest> mRequest;
|
|
RefPtr<ScriptLoader> mLoader;
|
|
RefPtr<DocGroup> mDocGroup;
|
|
void* mToken;
|
|
|
|
public:
|
|
NotifyOffThreadScriptLoadCompletedRunnable(ScriptLoadRequest* aRequest,
|
|
ScriptLoader* aLoader)
|
|
: Runnable("dom::NotifyOffThreadScriptLoadCompletedRunnable")
|
|
, mRequest(aRequest)
|
|
, mLoader(aLoader)
|
|
, mDocGroup(aLoader->GetDocGroup())
|
|
, mToken(nullptr)
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
}
|
|
|
|
virtual ~NotifyOffThreadScriptLoadCompletedRunnable();
|
|
|
|
void SetToken(void* aToken) {
|
|
MOZ_ASSERT(aToken && !mToken);
|
|
mToken = aToken;
|
|
}
|
|
|
|
static void Dispatch(already_AddRefed<NotifyOffThreadScriptLoadCompletedRunnable>&& aSelf) {
|
|
RefPtr<NotifyOffThreadScriptLoadCompletedRunnable> self = aSelf;
|
|
RefPtr<DocGroup> docGroup = self->mDocGroup;
|
|
docGroup->Dispatch("NotifyOffThreadScriptLoadCompletedRunnable",
|
|
TaskCategory::Other, self.forget());
|
|
}
|
|
|
|
NS_DECL_NSIRUNNABLE
|
|
};
|
|
|
|
} /* anonymous namespace */
|
|
|
|
nsresult
|
|
ScriptLoader::ProcessOffThreadRequest(ScriptLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT(aRequest->mProgress == ScriptLoadRequest::Progress::Compiling);
|
|
MOZ_ASSERT(!aRequest->mWasCompiledOMT);
|
|
|
|
aRequest->mWasCompiledOMT = true;
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
MOZ_ASSERT(aRequest->mOffThreadToken);
|
|
ModuleLoadRequest* request = aRequest->AsModuleRequest();
|
|
nsresult rv = ProcessFetchedModuleSource(request);
|
|
if (NS_FAILED(rv)) {
|
|
request->LoadFailed();
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
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);
|
|
mDocument->UnblockOnload(false);
|
|
ContinueParserAsync(aRequest);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult rv = ProcessRequest(aRequest);
|
|
mDocument->UnblockOnload(false);
|
|
return rv;
|
|
}
|
|
|
|
NotifyOffThreadScriptLoadCompletedRunnable::~NotifyOffThreadScriptLoadCompletedRunnable()
|
|
{
|
|
if (MOZ_UNLIKELY(mRequest || mLoader) && !NS_IsMainThread()) {
|
|
NS_ReleaseOnMainThread(
|
|
"NotifyOffThreadScriptLoadCompletedRunnable::mRequest", mRequest.forget());
|
|
NS_ReleaseOnMainThread(
|
|
"NotifyOffThreadScriptLoadCompletedRunnable::mLoader", mLoader.forget());
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
NotifyOffThreadScriptLoadCompletedRunnable::Run()
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
// We want these to be dropped on the main thread, once we return from this
|
|
// function.
|
|
RefPtr<ScriptLoadRequest> request = mRequest.forget();
|
|
RefPtr<ScriptLoader> loader = mLoader.forget();
|
|
|
|
request->mOffThreadToken = mToken;
|
|
nsresult rv = loader->ProcessOffThreadRequest(request);
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void
|
|
OffThreadScriptLoaderCallback(void* aToken, void* aCallbackData)
|
|
{
|
|
RefPtr<NotifyOffThreadScriptLoadCompletedRunnable> aRunnable =
|
|
dont_AddRef(static_cast<NotifyOffThreadScriptLoadCompletedRunnable*>(aCallbackData));
|
|
aRunnable->SetToken(aToken);
|
|
NotifyOffThreadScriptLoadCompletedRunnable::Dispatch(aRunnable.forget());
|
|
}
|
|
|
|
nsresult
|
|
ScriptLoader::AttemptAsyncScriptCompile(ScriptLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT_IF(!aRequest->IsModuleRequest(), aRequest->IsReadyToRun());
|
|
MOZ_ASSERT(!aRequest->mWasCompiledOMT);
|
|
|
|
// Don't off-thread compile inline scripts.
|
|
if (aRequest->mIsInline) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsCOMPtr<nsIScriptGlobalObject> globalObject = GetScriptGlobalObject();
|
|
if (!globalObject) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
AutoJSAPI jsapi;
|
|
if (!jsapi.Init(globalObject)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JSContext* cx = jsapi.cx();
|
|
JS::Rooted<JSObject*> global(cx, globalObject->GetGlobalJSObject());
|
|
JS::CompileOptions options(cx);
|
|
|
|
nsresult rv = FillCompileOptionsForRequest(jsapi, aRequest, global, &options);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
size_t len = aRequest->IsSource()
|
|
? aRequest->mScriptText.length()
|
|
: aRequest->mScriptBytecode.length();
|
|
if (!JS::CanCompileOffThread(cx, options, len)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
RefPtr<NotifyOffThreadScriptLoadCompletedRunnable> runnable =
|
|
new NotifyOffThreadScriptLoadCompletedRunnable(aRequest, this);
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
MOZ_ASSERT(aRequest->IsSource());
|
|
if (!JS::CompileOffThreadModule(cx, options,
|
|
aRequest->mScriptText.begin(),
|
|
aRequest->mScriptText.length(),
|
|
OffThreadScriptLoaderCallback,
|
|
static_cast<void*>(runnable))) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
} else if (aRequest->IsSource()) {
|
|
if (!JS::CompileOffThread(cx, options,
|
|
aRequest->mScriptText.begin(),
|
|
aRequest->mScriptText.length(),
|
|
OffThreadScriptLoaderCallback,
|
|
static_cast<void*>(runnable))) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
} else {
|
|
MOZ_ASSERT(aRequest->IsBytecode());
|
|
if (!JS::DecodeOffThreadScript(cx, options,
|
|
aRequest->mScriptBytecode,
|
|
aRequest->mBytecodeOffset,
|
|
OffThreadScriptLoaderCallback,
|
|
static_cast<void*>(runnable))) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
|
|
mDocument->BlockOnload();
|
|
|
|
// Once the compilation is finished, an event would be added to the event loop
|
|
// to call ScriptLoader::ProcessOffThreadRequest with the same request.
|
|
aRequest->mProgress = ScriptLoadRequest::Progress::Compiling;
|
|
|
|
Unused << runnable.forget();
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
ScriptLoader::CompileOffThreadOrProcessRequest(ScriptLoadRequest* aRequest)
|
|
{
|
|
NS_ASSERTION(nsContentUtils::IsSafeToRunScript(),
|
|
"Processing requests when running scripts is unsafe.");
|
|
NS_ASSERTION(!aRequest->mOffThreadToken,
|
|
"Candidate for off-thread compile is already parsed off-thread");
|
|
NS_ASSERTION(!aRequest->InCompilingStage(),
|
|
"Candidate for off-thread compile is already in compiling stage.");
|
|
|
|
nsresult rv = AttemptAsyncScriptCompile(aRequest);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return ProcessRequest(aRequest);
|
|
}
|
|
|
|
SourceBufferHolder
|
|
ScriptLoader::GetScriptSource(ScriptLoadRequest* aRequest, nsAutoString& inlineData)
|
|
{
|
|
// Return a SourceBufferHolder object holding the script's source text.
|
|
// |inlineData| is used to hold the text for inline objects.
|
|
|
|
// If there's no script text, we try to get it from the element
|
|
if (aRequest->mIsInline) {
|
|
// XXX This is inefficient - GetText makes multiple
|
|
// copies.
|
|
aRequest->mElement->GetScriptText(inlineData);
|
|
return SourceBufferHolder(inlineData.get(),
|
|
inlineData.Length(),
|
|
SourceBufferHolder::NoOwnership);
|
|
}
|
|
|
|
return SourceBufferHolder(aRequest->mScriptText.begin(),
|
|
aRequest->mScriptText.length(),
|
|
SourceBufferHolder::NoOwnership);
|
|
}
|
|
|
|
nsresult
|
|
ScriptLoader::ProcessRequest(ScriptLoadRequest* aRequest)
|
|
{
|
|
NS_ASSERTION(nsContentUtils::IsSafeToRunScript(),
|
|
"Processing requests when running scripts is unsafe.");
|
|
NS_ASSERTION(aRequest->IsReadyToRun(),
|
|
"Processing a request that is not ready to run.");
|
|
|
|
NS_ENSURE_ARG(aRequest);
|
|
|
|
if (aRequest->IsModuleRequest() &&
|
|
!aRequest->AsModuleRequest()->mModuleScript)
|
|
{
|
|
// There was an error parsing a module script. Nothing to do here.
|
|
FireScriptAvailable(NS_ERROR_FAILURE, aRequest);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsINode> scriptElem = do_QueryInterface(aRequest->mElement);
|
|
|
|
nsCOMPtr<nsIDocument> doc;
|
|
if (!aRequest->mIsInline) {
|
|
doc = scriptElem->OwnerDoc();
|
|
}
|
|
|
|
nsCOMPtr<nsIScriptElement> oldParserInsertedScript;
|
|
uint32_t parserCreated = aRequest->mElement->GetParserCreated();
|
|
if (parserCreated) {
|
|
oldParserInsertedScript = mCurrentParserInsertedScript;
|
|
mCurrentParserInsertedScript = aRequest->mElement;
|
|
}
|
|
|
|
aRequest->mElement->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,
|
|
NS_LITERAL_STRING("beforescriptexecute"),
|
|
true, true, &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->BeginEvaluatingExternalScript();
|
|
}
|
|
rv = EvaluateScript(aRequest);
|
|
if (doc) {
|
|
doc->EndEvaluatingExternalScript();
|
|
}
|
|
|
|
nsContentUtils::DispatchTrustedEvent(scriptElem->OwnerDoc(),
|
|
scriptElem,
|
|
NS_LITERAL_STRING("afterscriptexecute"),
|
|
true, false);
|
|
}
|
|
|
|
FireScriptEvaluated(rv, aRequest);
|
|
|
|
aRequest->mElement->EndEvaluating();
|
|
|
|
if (parserCreated) {
|
|
mCurrentParserInsertedScript = oldParserInsertedScript;
|
|
}
|
|
|
|
if (aRequest->mOffThreadToken) {
|
|
// 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 in the JS engine.
|
|
MOZ_ASSERT(!aRequest->IsModuleRequest());
|
|
aRequest->MaybeCancelOffThreadScript();
|
|
}
|
|
|
|
// Free any source data, but keep the bytecode content as we might have to
|
|
// save it later.
|
|
aRequest->mScriptText.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->mElement,
|
|
aRequest->mIsInline, aRequest->mURI,
|
|
aRequest->mLineNo);
|
|
}
|
|
|
|
aRequest->FireScriptAvailable(aResult);
|
|
}
|
|
|
|
void
|
|
ScriptLoader::FireScriptEvaluated(nsresult aResult,
|
|
ScriptLoadRequest* aRequest)
|
|
{
|
|
for (int32_t i = 0; i < mObservers.Count(); i++) {
|
|
nsCOMPtr<nsIScriptLoaderObserver> obs = mObservers[i];
|
|
obs->ScriptEvaluated(aResult, aRequest->mElement,
|
|
aRequest->mIsInline);
|
|
}
|
|
|
|
aRequest->FireScriptEvaluated(aResult);
|
|
}
|
|
|
|
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(const AutoJSAPI&jsapi,
|
|
ScriptLoadRequest* aRequest,
|
|
JS::Handle<JSObject*> aScopeChain,
|
|
JS::CompileOptions* aOptions)
|
|
{
|
|
// 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;
|
|
nsContentUtils::GetWrapperSafeScriptFilename(mDocument, aRequest->mURI,
|
|
aRequest->mURL, &rv);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
if (mDocument) {
|
|
mDocument->NoteScriptTrackingStatus(aRequest->mURL, aRequest->IsTracking());
|
|
}
|
|
|
|
bool isScriptElement = !aRequest->IsModuleRequest() ||
|
|
aRequest->AsModuleRequest()->IsTopLevel();
|
|
aOptions->setIntroductionType(isScriptElement ? "scriptElement"
|
|
: "importedModule");
|
|
aOptions->setFileAndLine(aRequest->mURL.get(), aRequest->mLineNo);
|
|
aOptions->setVersion(JSVersion(aRequest->mJSVersion));
|
|
aOptions->setIsRunOnce(true);
|
|
aOptions->setNoScriptRval(true);
|
|
if (aRequest->mHasSourceMapURL) {
|
|
aOptions->setSourceMapURL(aRequest->mSourceMapURL.get());
|
|
}
|
|
if (aRequest->mOriginPrincipal) {
|
|
nsIPrincipal* scriptPrin = nsContentUtils::ObjectPrincipal(aScopeChain);
|
|
bool subsumes = scriptPrin->Subsumes(aRequest->mOriginPrincipal);
|
|
aOptions->setMutedErrors(!subsumes);
|
|
}
|
|
|
|
JSContext* cx = jsapi.cx();
|
|
JS::Rooted<JS::Value> elementVal(cx);
|
|
MOZ_ASSERT(aRequest->mElement);
|
|
if (NS_SUCCEEDED(nsContentUtils::WrapNative(cx, aRequest->mElement,
|
|
&elementVal,
|
|
/* aAllowWrapping = */ true))) {
|
|
MOZ_ASSERT(elementVal.isObject());
|
|
aOptions->setElement(&elementVal.toObject());
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/* static */ bool
|
|
ScriptLoader::ShouldCacheBytecode(ScriptLoadRequest* aRequest)
|
|
{
|
|
using mozilla::TimeStamp;
|
|
using mozilla::TimeDuration;
|
|
|
|
// 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 = nsContentUtils::BytecodeCacheStrategy();
|
|
|
|
// List of parameters used by the strategies.
|
|
bool hasSourceLengthMin = false;
|
|
bool hasFetchCountMin = false;
|
|
bool hasTimeSinceLastFetched = false;
|
|
size_t sourceLengthMin = 100;
|
|
int32_t fetchCountMin = 5;
|
|
TimeDuration timeSinceLastFetched;
|
|
|
|
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;
|
|
hasTimeSinceLastFetched = false;
|
|
break;
|
|
}
|
|
default:
|
|
case 0: {
|
|
hasSourceLengthMin = true;
|
|
hasFetchCountMin = true;
|
|
hasTimeSinceLastFetched = true;
|
|
sourceLengthMin = 1024;
|
|
fetchCountMin = 5;
|
|
timeSinceLastFetched = TimeDuration::FromSeconds(72 * 3600);
|
|
break;
|
|
}
|
|
|
|
// The following strategies are made-up to study what impact each parameter
|
|
// has when compared to the default case.
|
|
case 1: {
|
|
hasSourceLengthMin = true;
|
|
hasFetchCountMin = true;
|
|
hasTimeSinceLastFetched = false;
|
|
sourceLengthMin = 1024;
|
|
fetchCountMin = 5;
|
|
break;
|
|
}
|
|
case 2: {
|
|
hasSourceLengthMin = true;
|
|
hasFetchCountMin = false;
|
|
hasTimeSinceLastFetched = true;
|
|
sourceLengthMin = 1024;
|
|
timeSinceLastFetched = TimeDuration::FromSeconds(72 * 3600);
|
|
break;
|
|
}
|
|
case 3: {
|
|
hasSourceLengthMin = false;
|
|
hasFetchCountMin = true;
|
|
hasTimeSinceLastFetched = true;
|
|
fetchCountMin = 5;
|
|
timeSinceLastFetched = TimeDuration::FromSeconds(72 * 3600);
|
|
break;
|
|
}
|
|
|
|
// The following strategies are made-up to study what impact each parameter
|
|
// has individually.
|
|
case 4: {
|
|
hasSourceLengthMin = false;
|
|
hasFetchCountMin = false;
|
|
hasTimeSinceLastFetched = true;
|
|
timeSinceLastFetched = TimeDuration::FromSeconds(72 * 3600);
|
|
break;
|
|
}
|
|
case 5: {
|
|
hasSourceLengthMin = false;
|
|
hasFetchCountMin = true;
|
|
hasTimeSinceLastFetched = false;
|
|
fetchCountMin = 5;
|
|
break;
|
|
}
|
|
case 6: {
|
|
hasSourceLengthMin = true;
|
|
hasFetchCountMin = false;
|
|
hasTimeSinceLastFetched = false;
|
|
sourceLengthMin = 1024;
|
|
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 && aRequest->mScriptText.length() < sourceLengthMin) {
|
|
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) {
|
|
int32_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;
|
|
}
|
|
}
|
|
|
|
// Check that the cache entry got accessed recently, before caching it.
|
|
if (hasTimeSinceLastFetched) {
|
|
uint32_t lastFetched = 0;
|
|
if (NS_FAILED(aRequest->mCacheInfo->GetCacheTokenLastFetched(&lastFetched))) {
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: Cannot get lastFetched.", aRequest));
|
|
return false;
|
|
}
|
|
uint32_t now = PR_Now() / PR_USEC_PER_SEC;
|
|
if (now < lastFetched) {
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: (What?) lastFetched set in the future.", aRequest));
|
|
return false;
|
|
}
|
|
TimeDuration since = TimeDuration::FromSeconds(now - lastFetched);
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: lastFetched = %f sec. ago.",
|
|
aRequest, since.ToSeconds()));
|
|
if (since >= timeSinceLastFetched) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: Trigger encoding.", aRequest));
|
|
return true;
|
|
}
|
|
|
|
nsresult
|
|
ScriptLoader::EvaluateScript(ScriptLoadRequest* aRequest)
|
|
{
|
|
using namespace mozilla::Telemetry;
|
|
MOZ_ASSERT(aRequest->IsReadyToRun());
|
|
|
|
// We need a document to evaluate scripts.
|
|
if (!mDocument) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> scriptContent(do_QueryInterface(aRequest->mElement));
|
|
nsIDocument* ownerDoc = scriptContent->OwnerDoc();
|
|
if (ownerDoc != mDocument) {
|
|
// Willful violation of HTML5 as of 2010-12-01
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Report telemetry results of the number of scripts evaluated.
|
|
mDocument->SetDocumentIncCounter(IncCounter::eIncCounter_ScriptTag);
|
|
|
|
// Get the script-type to be used by this element.
|
|
NS_ASSERTION(scriptContent, "no content - what is default script-type?");
|
|
|
|
nsCOMPtr<nsIScriptGlobalObject> globalObject = GetScriptGlobalObject();
|
|
if (!globalObject) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// 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.
|
|
nsCOMPtr<nsIScriptContext> context = globalObject->GetScriptContext();
|
|
if (!context) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JSVersion version = JSVersion(aRequest->mJSVersion);
|
|
if (version == JSVERSION_UNKNOWN) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// New script entry point required, due to the "Create a script" sub-step of
|
|
// http://www.whatwg.org/specs/web-apps/current-work/#execute-the-script-block
|
|
nsAutoMicroTask mt;
|
|
AutoEntryScript aes(globalObject, "<script> element", true);
|
|
JS::Rooted<JSObject*> global(aes.cx(),
|
|
globalObject->GetGlobalJSObject());
|
|
|
|
bool oldProcessingScriptTag = context->GetProcessingScriptTag();
|
|
context->SetProcessingScriptTag(true);
|
|
nsresult rv;
|
|
{
|
|
// Update our current script.
|
|
AutoCurrentScriptUpdater scriptUpdater(this, aRequest->mElement);
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
// When a module is already loaded, it is not feched a second time and the
|
|
// mDataType of the request might remain set to DataType::Unknown.
|
|
MOZ_ASSERT(!aRequest->IsBytecode());
|
|
LOG(("ScriptLoadRequest (%p): Evaluate Module", aRequest));
|
|
ModuleLoadRequest* request = aRequest->AsModuleRequest();
|
|
MOZ_ASSERT(request->mModuleScript);
|
|
MOZ_ASSERT(!request->mOffThreadToken);
|
|
ModuleScript* ms = request->mModuleScript;
|
|
MOZ_ASSERT(!ms->IsUninstantiated());
|
|
if (ms->InstantiationFailed()) {
|
|
JS::Rooted<JS::Value> exception(aes.cx(), ms->Exception());
|
|
JS_SetPendingException(aes.cx(), exception);
|
|
rv = NS_ERROR_FAILURE;
|
|
} else {
|
|
JS::Rooted<JSObject*> module(aes.cx(), ms->ModuleRecord());
|
|
MOZ_ASSERT(module);
|
|
rv = nsJSUtils::ModuleEvaluation(aes.cx(), module);
|
|
}
|
|
aRequest->mCacheInfo = nullptr;
|
|
} else {
|
|
JS::CompileOptions options(aes.cx());
|
|
rv = FillCompileOptionsForRequest(aes, aRequest, global, &options);
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
if (aRequest->IsBytecode()) {
|
|
TRACE_FOR_TEST(aRequest->mElement, "scriptloader_execute");
|
|
nsJSUtils::ExecutionContext exec(aes.cx(), global);
|
|
if (aRequest->mOffThreadToken) {
|
|
LOG(("ScriptLoadRequest (%p): Decode Bytecode & Join and Execute", aRequest));
|
|
AutoTimer<DOM_SCRIPT_OFF_THREAD_DECODE_EXEC_MS> timer;
|
|
rv = exec.DecodeJoinAndExec(&aRequest->mOffThreadToken);
|
|
} else {
|
|
LOG(("ScriptLoadRequest (%p): Decode Bytecode and Execute", aRequest));
|
|
AutoTimer<DOM_SCRIPT_MAIN_THREAD_DECODE_EXEC_MS> timer;
|
|
rv = exec.DecodeAndExec(options, aRequest->mScriptBytecode,
|
|
aRequest->mBytecodeOffset);
|
|
}
|
|
// We do not expect to be saving anything when we already have some
|
|
// bytecode.
|
|
MOZ_ASSERT(!aRequest->mCacheInfo);
|
|
} else {
|
|
MOZ_ASSERT(aRequest->IsSource());
|
|
JS::Rooted<JSScript*> script(aes.cx());
|
|
bool encodeBytecode = ShouldCacheBytecode(aRequest);
|
|
|
|
TimeStamp start;
|
|
if (Telemetry::CanRecordExtended()) {
|
|
// Only record telemetry for scripts which are above the threshold.
|
|
if (aRequest->mCacheInfo && aRequest->mScriptText.length() < 1024) {
|
|
start = TimeStamp::Now();
|
|
}
|
|
}
|
|
|
|
{
|
|
nsJSUtils::ExecutionContext exec(aes.cx(), global);
|
|
exec.SetEncodeBytecode(encodeBytecode);
|
|
TRACE_FOR_TEST(aRequest->mElement, "scriptloader_execute");
|
|
if (aRequest->mOffThreadToken) {
|
|
// Off-main-thread parsing.
|
|
LOG(("ScriptLoadRequest (%p): Join (off-thread parsing) and Execute",
|
|
aRequest));
|
|
rv = exec.JoinAndExec(&aRequest->mOffThreadToken, &script);
|
|
if (start) {
|
|
AccumulateTimeDelta(encodeBytecode
|
|
? DOM_SCRIPT_OFF_THREAD_PARSE_ENCODE_EXEC_MS
|
|
: DOM_SCRIPT_OFF_THREAD_PARSE_EXEC_MS,
|
|
start);
|
|
}
|
|
} else {
|
|
// Main thread parsing (inline and small scripts)
|
|
LOG(("ScriptLoadRequest (%p): Compile And Exec", aRequest));
|
|
nsAutoString inlineData;
|
|
SourceBufferHolder srcBuf = GetScriptSource(aRequest, inlineData);
|
|
rv = exec.CompileAndExec(options, srcBuf, &script);
|
|
if (start) {
|
|
AccumulateTimeDelta(encodeBytecode
|
|
? DOM_SCRIPT_MAIN_THREAD_PARSE_ENCODE_EXEC_MS
|
|
: DOM_SCRIPT_MAIN_THREAD_PARSE_EXEC_MS,
|
|
start);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Queue the current script load request to later save the bytecode.
|
|
if (script && encodeBytecode) {
|
|
aRequest->mScript = script;
|
|
HoldJSObjects(aRequest);
|
|
TRACE_FOR_TEST(aRequest->mElement, "scriptloader_encode");
|
|
MOZ_ASSERT(aRequest->mBytecodeOffset == aRequest->mScriptBytecode.length());
|
|
RegisterForBytecodeEncoding(aRequest);
|
|
} else {
|
|
LOG(("ScriptLoadRequest (%p): Bytecode-cache: disabled (rv = %X, script = %p)",
|
|
aRequest, unsigned(rv), script.get()));
|
|
TRACE_FOR_TEST_NONE(aRequest->mElement, "scriptloader_no_encode");
|
|
aRequest->mCacheInfo = nullptr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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.
|
|
MaybeTriggerBytecodeEncoding();
|
|
}
|
|
|
|
context->SetProcessingScriptTag(oldProcessingScriptTag);
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
ScriptLoader::RegisterForBytecodeEncoding(ScriptLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT(aRequest->mCacheInfo);
|
|
MOZ_ASSERT(aRequest->mScript);
|
|
mBytecodeEncodingQueue.AppendElement(aRequest);
|
|
}
|
|
|
|
void
|
|
ScriptLoader::LoadEventFired()
|
|
{
|
|
mLoadEventFired = true;
|
|
MaybeTriggerBytecodeEncoding();
|
|
}
|
|
|
|
void
|
|
ScriptLoader::MaybeTriggerBytecodeEncoding()
|
|
{
|
|
// 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) {
|
|
return;
|
|
}
|
|
|
|
// No need to fire any event if there is no bytecode to be saved.
|
|
if (mBytecodeEncodingQueue.isEmpty()) {
|
|
return;
|
|
}
|
|
|
|
// Wait until all scripts are loaded before saving the bytecode, such that
|
|
// we capture most of the intialization of the page.
|
|
if (HasPendingRequests()) {
|
|
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_IdleDispatchToCurrentThread(encoder.forget()))) {
|
|
GiveUpBytecodeEncoding();
|
|
}
|
|
}
|
|
|
|
void
|
|
ScriptLoader::EncodeBytecode()
|
|
{
|
|
// 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;
|
|
}
|
|
|
|
nsCOMPtr<nsIScriptGlobalObject> globalObject = GetScriptGlobalObject();
|
|
if (!globalObject) {
|
|
GiveUpBytecodeEncoding();
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIScriptContext> context = globalObject->GetScriptContext();
|
|
if (!context) {
|
|
GiveUpBytecodeEncoding();
|
|
return;
|
|
}
|
|
|
|
Telemetry::AutoTimer<Telemetry::DOM_SCRIPT_ENCODING_MS_PER_DOCUMENT> timer;
|
|
AutoEntryScript aes(globalObject, "encode bytecode", true);
|
|
RefPtr<ScriptLoadRequest> request;
|
|
while (!mBytecodeEncodingQueue.isEmpty()) {
|
|
request = mBytecodeEncodingQueue.StealFirst();
|
|
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->mElement, "scriptloader_bytecode_failed");
|
|
});
|
|
|
|
JS::RootedScript script(aCx, aRequest->mScript);
|
|
if (!JS::FinishIncrementalEncoding(aCx, script, aRequest->mScriptBytecode)) {
|
|
LOG(("ScriptLoadRequest (%p): Cannot serialize bytecode",
|
|
aRequest));
|
|
AccumulateCategorical(LABELS_DOM_SCRIPT_ENCODING_STATUS::EncodingFailure);
|
|
return;
|
|
}
|
|
|
|
if (aRequest->mScriptBytecode.length() >= UINT32_MAX) {
|
|
LOG(("ScriptLoadRequest (%p): Bytecode cache is too large to be decoded correctly.",
|
|
aRequest));
|
|
AccumulateCategorical(LABELS_DOM_SCRIPT_ENCODING_STATUS::BufferTooLarge);
|
|
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<nsIOutputStream> output;
|
|
rv = aRequest->mCacheInfo->OpenAlternativeOutputStream(nsContentUtils::JSBytecodeMimeType(),
|
|
getter_AddRefs(output));
|
|
if (NS_FAILED(rv)) {
|
|
LOG(("ScriptLoadRequest (%p): Cannot open bytecode cache (rv = %X, output = %p)",
|
|
aRequest, unsigned(rv), output.get()));
|
|
AccumulateCategorical(LABELS_DOM_SCRIPT_ENCODING_STATUS::OpenFailure);
|
|
return;
|
|
}
|
|
MOZ_ASSERT(output);
|
|
auto closeOutStream = mozilla::MakeScopeExit([&]() {
|
|
nsresult rv = output->Close();
|
|
LOG(("ScriptLoadRequest (%p): Closing (rv = %X)",
|
|
aRequest, unsigned(rv)));
|
|
if (NS_FAILED(rv)) {
|
|
AccumulateCategorical(LABELS_DOM_SCRIPT_ENCODING_STATUS::CloseFailure);
|
|
}
|
|
});
|
|
|
|
uint32_t n;
|
|
rv = output->Write(reinterpret_cast<char*>(aRequest->mScriptBytecode.begin()),
|
|
aRequest->mScriptBytecode.length(), &n);
|
|
LOG(("ScriptLoadRequest (%p): Write bytecode cache (rv = %X, length = %u, written = %u)",
|
|
aRequest, unsigned(rv), unsigned(aRequest->mScriptBytecode.length()), n));
|
|
if (NS_FAILED(rv)) {
|
|
AccumulateCategorical(LABELS_DOM_SCRIPT_ENCODING_STATUS::WriteFailure);
|
|
return;
|
|
}
|
|
|
|
bytecodeFailed.release();
|
|
TRACE_FOR_TEST_NONE(aRequest->mElement, "scriptloader_bytecode_saved");
|
|
AccumulateCategorical(LABELS_DOM_SCRIPT_ENCODING_STATUS::EncodingSuccess);
|
|
}
|
|
|
|
void
|
|
ScriptLoader::GiveUpBytecodeEncoding()
|
|
{
|
|
// 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();
|
|
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->mElement, "scriptloader_bytecode_failed");
|
|
|
|
if (aes.isSome()) {
|
|
JS::RootedScript script(aes->cx(), request->mScript);
|
|
Unused << JS::FinishIncrementalEncoding(aes->cx(), script,
|
|
request->mScriptBytecode);
|
|
}
|
|
|
|
request->mScriptBytecode.clearAndFree();
|
|
request->DropBytecodeCacheReferences();
|
|
}
|
|
}
|
|
|
|
bool
|
|
ScriptLoader::HasPendingRequests()
|
|
{
|
|
return mParserBlockingRequest ||
|
|
!mXSLTRequests.isEmpty() ||
|
|
!mLoadedAsyncRequests.isEmpty() ||
|
|
!mNonAsyncExternalScriptInsertedRequests.isEmpty() ||
|
|
!mDeferRequests.isEmpty() ||
|
|
!mPendingChildLoaders.IsEmpty();
|
|
}
|
|
|
|
void
|
|
ScriptLoader::ProcessPendingRequestsAsync()
|
|
{
|
|
if (HasPendingRequests()) {
|
|
nsCOMPtr<nsIRunnable> task =
|
|
NewRunnableMethod("dom::ScriptLoader::ProcessPendingRequests",
|
|
this,
|
|
&ScriptLoader::ProcessPendingRequests);
|
|
if (mDocument) {
|
|
mDocument->Dispatch("ScriptLoader", TaskCategory::Other, task.forget());
|
|
} else {
|
|
NS_DispatchToCurrentThread(task.forget());
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
ScriptLoader::ProcessPendingRequests()
|
|
{
|
|
RefPtr<ScriptLoadRequest> request;
|
|
|
|
if (mParserBlockingRequest &&
|
|
mParserBlockingRequest->IsReadyToRun() &&
|
|
ReadyToExecuteParserBlockingScripts()) {
|
|
request.swap(mParserBlockingRequest);
|
|
UnblockParser(request);
|
|
ProcessRequest(request);
|
|
if (request->mWasCompiledOMT) {
|
|
mDocument->UnblockOnload(false);
|
|
}
|
|
ContinueParserAsync(request);
|
|
}
|
|
|
|
while (ReadyToExecuteParserBlockingScripts() &&
|
|
!mXSLTRequests.isEmpty() &&
|
|
mXSLTRequests.getFirst()->IsReadyToRun()) {
|
|
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()->IsReadyToRun()) {
|
|
// 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 (mDocumentParsingDone && mXSLTRequests.isEmpty()) {
|
|
while (ReadyToExecuteScripts() &&
|
|
!mDeferRequests.isEmpty() &&
|
|
mDeferRequests.getFirst()->IsReadyToRun()) {
|
|
request = mDeferRequests.StealFirst();
|
|
ProcessRequest(request);
|
|
}
|
|
}
|
|
|
|
while (!mPendingChildLoaders.IsEmpty() &&
|
|
ReadyToExecuteParserBlockingScripts()) {
|
|
RefPtr<ScriptLoader> child = mPendingChildLoaders[0];
|
|
mPendingChildLoaders.RemoveElementAt(0);
|
|
child->RemoveParserBlockingScriptExecutionBlocker();
|
|
}
|
|
|
|
if (mDocumentParsingDone && mDocument && !mParserBlockingRequest &&
|
|
mNonAsyncExternalScriptInsertedRequests.isEmpty() &&
|
|
mXSLTRequests.isEmpty() && mDeferRequests.isEmpty() &&
|
|
MaybeRemovedDeferRequests()) {
|
|
return ProcessPendingRequests();
|
|
}
|
|
|
|
if (mDocumentParsingDone && 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.
|
|
mDocumentParsingDone = 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;
|
|
}
|
|
|
|
for (nsIDocument* doc = mDocument; doc; doc = doc->GetParentDocument()) {
|
|
ScriptLoader* ancestor = doc->ScriptLoader();
|
|
if (!ancestor->SelfReadyToExecuteParserBlockingScripts() &&
|
|
ancestor->AddPendingChildLoader(this)) {
|
|
AddParserBlockingScriptExecutionBlocker();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* static */ nsresult
|
|
ScriptLoader::ConvertToUTF16(nsIChannel* aChannel, const uint8_t* aData,
|
|
uint32_t aLength, const nsAString& aHintCharset,
|
|
nsIDocument* aDocument,
|
|
char16_t*& aBufOut, size_t& aLengthOut)
|
|
{
|
|
if (!aLength) {
|
|
aBufOut = nullptr;
|
|
aLengthOut = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
auto data = MakeSpan(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;
|
|
size_t bomLength;
|
|
Tie(encoding, bomLength) = 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 = Encoding::ForName(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();
|
|
}
|
|
|
|
CheckedInt<size_t> unicodeLength =
|
|
unicodeDecoder->MaxUTF16BufferLength(aLength);
|
|
if (!unicodeLength.isValid()) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
aBufOut =
|
|
static_cast<char16_t*>(js_malloc(unicodeLength.value() * sizeof(char16_t)));
|
|
if (!aBufOut) {
|
|
aLengthOut = 0;
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
uint32_t result;
|
|
size_t read;
|
|
size_t written;
|
|
bool hadErrors;
|
|
Tie(result, read, written, hadErrors) = unicodeDecoder->DecodeToUTF16(
|
|
data, MakeSpan(aBufOut, unicodeLength.value()), true);
|
|
MOZ_ASSERT(result == kInputEmpty);
|
|
MOZ_ASSERT(read == aLength);
|
|
MOZ_ASSERT(written <= unicodeLength.value());
|
|
Unused << hadErrors;
|
|
aLengthOut = written;
|
|
|
|
nsAutoCString charset;
|
|
unicodeDecoder->Encoding()->Name(charset);
|
|
mozilla::Telemetry::Accumulate(mozilla::Telemetry::DOM_SCRIPT_SRC_ENCODING,
|
|
charset);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
ScriptLoader::OnStreamComplete(nsIIncrementalStreamLoader* aLoader,
|
|
ScriptLoadRequest* aRequest,
|
|
nsresult aChannelStatus,
|
|
nsresult aSRIStatus,
|
|
mozilla::dom::SRICheckDataVerifier* aSRIDataVerifier)
|
|
{
|
|
NS_ASSERTION(aRequest, "null request in stream complete handler");
|
|
NS_ENSURE_TRUE(aRequest, NS_ERROR_FAILURE);
|
|
|
|
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;
|
|
}
|
|
} else {
|
|
nsCOMPtr<nsILoadInfo> loadInfo = channel->GetLoadInfo();
|
|
|
|
if (loadInfo && loadInfo->GetEnforceSRI()) {
|
|
MOZ_LOG(SRILogHelper::GetSriLog(), mozilla::LogLevel::Debug,
|
|
("ScriptLoader::OnStreamComplete, required SRI not found"));
|
|
nsCOMPtr<nsIContentSecurityPolicy> csp;
|
|
loadInfo->LoadingPrincipal()->GetCsp(getter_AddRefs(csp));
|
|
nsAutoCString violationURISpec;
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(violationURISpec);
|
|
uint32_t lineNo = aRequest->mElement ? aRequest->mElement->GetScriptLineNumber() : 0;
|
|
csp->LogViolationDetails(
|
|
nsIContentSecurityPolicy::VIOLATION_TYPE_REQUIRE_SRI_FOR_SCRIPT,
|
|
NS_ConvertUTF8toUTF16(violationURISpec),
|
|
EmptyString(), lineNo, EmptyString(), EmptyString());
|
|
rv = NS_ERROR_SRI_CORRUPT;
|
|
}
|
|
}
|
|
|
|
bool sriOk = 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 (sriOk && aRequest->IsSource()) {
|
|
MOZ_ASSERT(aRequest->mScriptBytecode.empty());
|
|
// If the integrity metadata does not correspond to a valid hash function,
|
|
// IsComplete would be false.
|
|
if (!aRequest->mIntegrity.IsEmpty() && aSRIDataVerifier->IsComplete()) {
|
|
// Encode the SRI computed hash.
|
|
uint32_t len = aSRIDataVerifier->DataSummaryLength();
|
|
if (!aRequest->mScriptBytecode.growBy(len)) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
aRequest->mBytecodeOffset = len;
|
|
|
|
DebugOnly<nsresult> res = aSRIDataVerifier->ExportDataSummary(
|
|
aRequest->mScriptBytecode.length(),
|
|
aRequest->mScriptBytecode.begin());
|
|
MOZ_ASSERT(NS_SUCCEEDED(res));
|
|
} else {
|
|
// Encode a dummy SRI hash.
|
|
uint32_t len = SRICheckDataVerifier::EmptyDataSummaryLength();
|
|
if (!aRequest->mScriptBytecode.growBy(len)) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
aRequest->mBytecodeOffset = len;
|
|
|
|
DebugOnly<nsresult> res = SRICheckDataVerifier::ExportEmptyDataSummary(
|
|
aRequest->mScriptBytecode.length(),
|
|
aRequest->mScriptBytecode.begin());
|
|
MOZ_ASSERT(NS_SUCCEEDED(res));
|
|
}
|
|
|
|
// Verify that the exported and predicted length correspond.
|
|
mozilla::DebugOnly<uint32_t> srilen;
|
|
MOZ_ASSERT(NS_SUCCEEDED(SRICheckDataVerifier::DataSummaryLength(
|
|
aRequest->mScriptBytecode.length(),
|
|
aRequest->mScriptBytecode.begin(),
|
|
&srilen)));
|
|
MOZ_ASSERT(srilen == aRequest->mBytecodeOffset);
|
|
}
|
|
|
|
if (sriOk) {
|
|
rv = PrepareLoadedRequest(aRequest, aLoader, aChannelStatus);
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
if (sriOk && aRequest->mElement) {
|
|
|
|
uint32_t lineNo = aRequest->mElement->GetScriptLineNumber();
|
|
|
|
nsAutoString url;
|
|
if (aRequest->mURI) {
|
|
AppendUTF8toUTF16(aRequest->mURI->GetSpecOrDefault(), url);
|
|
}
|
|
|
|
const char16_t* params[] = { url.get() };
|
|
|
|
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
|
|
NS_LITERAL_CSTRING("Script Loader"), mDocument,
|
|
nsContentUtils::eDOM_PROPERTIES, "ScriptSourceLoadFailed",
|
|
params, ArrayLength(params), nullptr,
|
|
EmptyString(), lineNo);
|
|
}
|
|
|
|
/*
|
|
* Handle script not loading error because source was a tracking URL.
|
|
* We make a note of this script node by including it in a dedicated
|
|
* array of blocked tracking nodes under its parent document.
|
|
*/
|
|
if (rv == NS_ERROR_TRACKING_URI) {
|
|
nsCOMPtr<nsIContent> cont = do_QueryInterface(aRequest->mElement);
|
|
mDocument->AddBlockedTrackingNode(cont);
|
|
}
|
|
|
|
if (aChannelStatus == NS_BINDING_RETARGETED) {
|
|
// 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. This test makes sure we do not remove the current
|
|
// request from the following lists when we restart the load.
|
|
} else if (aRequest->mIsDefer) {
|
|
MOZ_ASSERT_IF(aRequest->IsModuleRequest(),
|
|
aRequest->AsModuleRequest()->IsTopLevel());
|
|
if (aRequest->isInList()) {
|
|
RefPtr<ScriptLoadRequest> req = mDeferRequests.Steal(aRequest);
|
|
FireScriptAvailable(rv, req);
|
|
}
|
|
} else if (aRequest->mIsAsync) {
|
|
MOZ_ASSERT_IF(aRequest->IsModuleRequest(),
|
|
aRequest->AsModuleRequest()->IsTopLevel());
|
|
if (aRequest->isInList()) {
|
|
RefPtr<ScriptLoadRequest> req = mLoadingAsyncRequests.Steal(aRequest);
|
|
FireScriptAvailable(rv, req);
|
|
}
|
|
} else if (aRequest->mIsNonAsyncScriptInserted) {
|
|
if (aRequest->isInList()) {
|
|
RefPtr<ScriptLoadRequest> req =
|
|
mNonAsyncExternalScriptInsertedRequests.Steal(aRequest);
|
|
FireScriptAvailable(rv, req);
|
|
}
|
|
} else if (aRequest->mIsXSLT) {
|
|
if (aRequest->isInList()) {
|
|
RefPtr<ScriptLoadRequest> req = mXSLTRequests.Steal(aRequest);
|
|
FireScriptAvailable(rv, req);
|
|
}
|
|
} else if (aRequest->IsModuleRequest()) {
|
|
ModuleLoadRequest* modReq = aRequest->AsModuleRequest();
|
|
MOZ_ASSERT(!modReq->IsTopLevel());
|
|
MOZ_ASSERT(!modReq->isInList());
|
|
modReq->Cancel();
|
|
FireScriptAvailable(rv, aRequest);
|
|
} else if (mParserBlockingRequest == aRequest) {
|
|
MOZ_ASSERT(!aRequest->isInList());
|
|
mParserBlockingRequest = nullptr;
|
|
UnblockParser(aRequest);
|
|
|
|
// Ensure that we treat aRequest->mElement as our current parser-inserted
|
|
// script while firing onerror on it.
|
|
MOZ_ASSERT(aRequest->mElement->GetParserCreated());
|
|
nsCOMPtr<nsIScriptElement> oldParserInsertedScript =
|
|
mCurrentParserInsertedScript;
|
|
mCurrentParserInsertedScript = aRequest->mElement;
|
|
FireScriptAvailable(rv, aRequest);
|
|
ContinueParserAsync(aRequest);
|
|
mCurrentParserInsertedScript = oldParserInsertedScript;
|
|
} else {
|
|
mPreloads.RemoveElement(aRequest, PreloadRequestComparator());
|
|
}
|
|
}
|
|
|
|
// Process our request and/or any pending ones
|
|
ProcessPendingRequests();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
ScriptLoader::UnblockParser(ScriptLoadRequest* aParserBlockingRequest)
|
|
{
|
|
aParserBlockingRequest->mElement->UnblockParser();
|
|
}
|
|
|
|
void
|
|
ScriptLoader::ContinueParserAsync(ScriptLoadRequest* aParserBlockingRequest)
|
|
{
|
|
aParserBlockingRequest->mElement->ContinueParserAsync();
|
|
}
|
|
|
|
uint32_t
|
|
ScriptLoader::NumberOfProcessors()
|
|
{
|
|
if (mNumberOfProcessors > 0)
|
|
return mNumberOfProcessors;
|
|
|
|
int32_t numProcs = PR_GetNumberOfProcessors();
|
|
if (numProcs > 0)
|
|
mNumberOfProcessors = numProcs;
|
|
return mNumberOfProcessors;
|
|
}
|
|
|
|
void
|
|
ScriptLoader::MaybeMoveToLoadedList(ScriptLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT(aRequest->IsReadyToRun());
|
|
|
|
// If it's async, move it to the loaded list. aRequest->mIsAsync 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->mIsAsync) {
|
|
MOZ_ASSERT(aRequest->isInList());
|
|
if (aRequest->isInList()) {
|
|
RefPtr<ScriptLoadRequest> req = mLoadingAsyncRequests.Steal(aRequest);
|
|
mLoadedAsyncRequests.AppendElement(req);
|
|
}
|
|
}
|
|
}
|
|
|
|
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->IsLoading());
|
|
CollectScriptTelemetry(aLoader, 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;
|
|
}
|
|
|
|
nsAutoCString sourceMapURL;
|
|
rv = httpChannel->GetResponseHeader(NS_LITERAL_CSTRING("SourceMap"), sourceMapURL);
|
|
if (NS_FAILED(rv)) {
|
|
rv = httpChannel->GetResponseHeader(NS_LITERAL_CSTRING("X-SourceMap"), sourceMapURL);
|
|
}
|
|
if (NS_SUCCEEDED(rv)) {
|
|
aRequest->mHasSourceMapURL = true;
|
|
aRequest->mSourceMapURL = NS_ConvertUTF8toUTF16(sourceMapURL);
|
|
}
|
|
|
|
if (httpChannel->GetIsTrackingResource()) {
|
|
aRequest->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
|
|
if (aRequest->mCORSMode == 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()->IsTopLevel() &&
|
|
!aRequest->isInList()) ||
|
|
mPreloads.Contains(aRequest, PreloadRequestComparator()) ||
|
|
mParserBlockingRequest,
|
|
"aRequest should be pending!");
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
MOZ_ASSERT(aRequest->IsSource());
|
|
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;
|
|
}
|
|
|
|
channel->GetURI(getter_AddRefs(request->mBaseURL));
|
|
|
|
// Attempt to compile off main thread.
|
|
rv = AttemptAsyncScriptCompile(request);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Otherwise compile it right away and start fetching descendents.
|
|
return ProcessFetchedModuleSource(request);
|
|
}
|
|
|
|
// The script is now loaded and ready to run.
|
|
aRequest->SetReady();
|
|
|
|
// If this is currently blocking the parser, attempt to compile it off-main-thread.
|
|
if (aRequest == mParserBlockingRequest && NumberOfProcessors() > 1) {
|
|
MOZ_ASSERT(!aRequest->IsModuleRequest());
|
|
nsresult rv = AttemptAsyncScriptCompile(aRequest);
|
|
if (rv == NS_OK) {
|
|
MOZ_ASSERT(aRequest->mProgress == ScriptLoadRequest::Progress::Compiling,
|
|
"Request should be off-thread compiling now.");
|
|
return NS_OK;
|
|
}
|
|
|
|
// If off-thread compile errored, return the error.
|
|
if (rv != NS_ERROR_FAILURE) {
|
|
return rv;
|
|
}
|
|
|
|
// If off-thread compile was rejected, continue with regular processing.
|
|
}
|
|
|
|
MaybeMoveToLoadedList(aRequest);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
ScriptLoader::ParsingComplete(bool aTerminated)
|
|
{
|
|
if (mDeferEnabled) {
|
|
// Have to check because we apparently get ParsingComplete
|
|
// without BeginDeferringScripts in some cases
|
|
mDocumentParsingDone = true;
|
|
}
|
|
mDeferEnabled = false;
|
|
if (aTerminated) {
|
|
mDeferRequests.Clear();
|
|
mLoadingAsyncRequests.Clear();
|
|
mLoadedAsyncRequests.Clear();
|
|
mNonAsyncExternalScriptInsertedRequests.Clear();
|
|
mXSLTRequests.Clear();
|
|
if (mParserBlockingRequest) {
|
|
mParserBlockingRequest->Cancel();
|
|
mParserBlockingRequest = nullptr;
|
|
}
|
|
}
|
|
|
|
// Have to call this even if aTerminated so we'll correctly unblock
|
|
// onload and all.
|
|
ProcessPendingRequests();
|
|
}
|
|
|
|
void
|
|
ScriptLoader::PreloadURI(nsIURI* aURI, const nsAString& aCharset,
|
|
const nsAString& aType,
|
|
const nsAString& aCrossOrigin,
|
|
const nsAString& aIntegrity,
|
|
bool aScriptFromHead,
|
|
const mozilla::net::ReferrerPolicy aReferrerPolicy)
|
|
{
|
|
NS_ENSURE_TRUE_VOID(mDocument);
|
|
// Check to see if scripts has been turned off.
|
|
if (!mEnabled || !mDocument->IsScriptEnabled()) {
|
|
return;
|
|
}
|
|
|
|
// TODO: Preload module scripts.
|
|
if (ModuleScriptsEnabled() && aType.LowerCaseEqualsASCII("module")) {
|
|
return;
|
|
}
|
|
|
|
SRIMetadata sriMetadata;
|
|
if (!aIntegrity.IsEmpty()) {
|
|
MOZ_LOG(SRILogHelper::GetSriLog(), mozilla::LogLevel::Debug,
|
|
("ScriptLoader::PreloadURI, integrity=%s",
|
|
NS_ConvertUTF16toUTF8(aIntegrity).get()));
|
|
nsAutoCString sourceUri;
|
|
if (mDocument->GetDocumentURI()) {
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
SRICheck::IntegrityMetadata(aIntegrity, sourceUri, mReporter, &sriMetadata);
|
|
}
|
|
|
|
RefPtr<ScriptLoadRequest> request =
|
|
CreateLoadRequest(ScriptKind::Classic, nullptr, 0,
|
|
Element::StringToCORSMode(aCrossOrigin), sriMetadata);
|
|
request->mURI = aURI;
|
|
request->mIsInline = false;
|
|
request->mReferrerPolicy = aReferrerPolicy;
|
|
request->mScriptFromHead = aScriptFromHead;
|
|
|
|
nsresult rv = StartLoad(request);
|
|
if (NS_FAILED(rv)) {
|
|
return;
|
|
}
|
|
|
|
PreloadInfo* pi = mPreloads.AppendElement();
|
|
pi->mRequest = request;
|
|
pi->mCharset = aCharset;
|
|
}
|
|
|
|
void
|
|
ScriptLoader::AddDeferRequest(ScriptLoadRequest* aRequest)
|
|
{
|
|
aRequest->mIsDefer = true;
|
|
mDeferRequests.AppendElement(aRequest);
|
|
if (mDeferEnabled && aRequest == mDeferRequests.getFirst() &&
|
|
mDocument && !mBlockingDOMContentLoaded) {
|
|
MOZ_ASSERT(mDocument->GetReadyStateEnum() == nsIDocument::READYSTATE_LOADING);
|
|
mBlockingDOMContentLoaded = true;
|
|
mDocument->BlockDOMContentLoaded();
|
|
}
|
|
}
|
|
|
|
bool
|
|
ScriptLoader::MaybeRemovedDeferRequests()
|
|
{
|
|
if (mDeferRequests.isEmpty() && mDocument &&
|
|
mBlockingDOMContentLoaded) {
|
|
mBlockingDOMContentLoaded = false;
|
|
mDocument->UnblockDOMContentLoaded();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
#undef TRACE_FOR_TEST
|
|
#undef TRACE_FOR_TEST_BOOL
|
|
#undef TRACE_FOR_TEST_NONE
|
|
|
|
#undef LOG
|
|
|
|
} // dom namespace
|
|
} // mozilla namespace
|