mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
3785 lines
112 KiB
C++
3785 lines
112 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 "nsError.h"
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#include "nsJSEnvironment.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsIScriptObjectPrincipal.h"
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#include "nsIDOMChromeWindow.h"
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#include "nsPIDOMWindow.h"
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#include "nsIScriptSecurityManager.h"
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#include "nsDOMCID.h"
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#include "nsIServiceManager.h"
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#include "nsIXPConnect.h"
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#include "nsIJSRuntimeService.h"
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#include "nsCOMPtr.h"
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#include "nsISupportsPrimitives.h"
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#include "nsReadableUtils.h"
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#include "nsJSUtils.h"
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#include "nsIDocShell.h"
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#include "nsIDocShellTreeItem.h"
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#include "nsPresContext.h"
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#include "nsIConsoleService.h"
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#include "nsIScriptError.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsIPrompt.h"
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#include "nsIObserverService.h"
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#include "nsGUIEvent.h"
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#include "nsThreadUtils.h"
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#include "nsITimer.h"
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#include "nsIAtom.h"
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#include "nsContentUtils.h"
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#include "nsEventDispatcher.h"
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#include "nsIContent.h"
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#include "nsCycleCollector.h"
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#include "nsNetUtil.h"
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#include "nsXPCOMCIDInternal.h"
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#include "nsIXULRuntime.h"
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#include "xpcpublic.h"
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#include "jsdbgapi.h" // for JS_ClearWatchPointsForObject
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#include "jswrapper.h"
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#include "nsIArray.h"
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#include "nsIObjectInputStream.h"
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#include "nsIObjectOutputStream.h"
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#include "prmem.h"
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#include "WrapperFactory.h"
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#include "nsGlobalWindow.h"
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#include "nsScriptNameSpaceManager.h"
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#include "StructuredCloneTags.h"
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#include "mozilla/dom/ImageData.h"
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#include "mozilla/dom/ImageDataBinding.h"
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#include "nsJSPrincipals.h"
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#include "jsdbgapi.h"
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#ifdef XP_MACOSX
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// AssertMacros.h defines 'check' and conflicts with AccessCheck.h
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#undef check
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#endif
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#include "AccessCheck.h"
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#ifdef MOZ_JSDEBUGGER
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#include "jsdIDebuggerService.h"
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#endif
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#ifdef MOZ_LOGGING
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// Force PR_LOGGING so we can get JS strict warnings even in release builds
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#define FORCE_PR_LOG 1
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#endif
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#include "prlog.h"
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#include "prthread.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/Telemetry.h"
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#include "mozilla/dom/BindingUtils.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/dom/CanvasRenderingContext2DBinding.h"
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#include "GeckoProfiler.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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const size_t gStackSize = 8192;
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#ifdef PR_LOGGING
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static PRLogModuleInfo* gJSDiagnostics;
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#endif
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// Thank you Microsoft!
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#ifdef CompareString
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#undef CompareString
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#endif
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#define NS_SHRINK_GC_BUFFERS_DELAY 4000 // ms
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// The amount of time we wait from the first request to GC to actually
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// doing the first GC.
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#define NS_FIRST_GC_DELAY 10000 // ms
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#define NS_FULL_GC_DELAY 60000 // ms
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#define NS_MAX_COMPARTMENT_GC_COUNT 20
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// Maximum amount of time that should elapse between incremental GC slices
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#define NS_INTERSLICE_GC_DELAY 100 // ms
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// If we haven't painted in 100ms, we allow for a longer GC budget
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#define NS_INTERSLICE_GC_BUDGET 40 // ms
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// The amount of time we wait between a request to CC (after GC ran)
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// and doing the actual CC.
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#define NS_CC_DELAY 6000 // ms
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#define NS_CC_SKIPPABLE_DELAY 400 // ms
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// Force a CC after this long if there's more than NS_CC_FORCED_PURPLE_LIMIT
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// objects in the purple buffer.
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#define NS_CC_FORCED (2 * 60 * PR_USEC_PER_SEC) // 2 min
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#define NS_CC_FORCED_PURPLE_LIMIT 10
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// Don't allow an incremental GC to lock out the CC for too long.
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#define NS_MAX_CC_LOCKEDOUT_TIME (15 * PR_USEC_PER_SEC) // 15 seconds
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// Trigger a CC if the purple buffer exceeds this size when we check it.
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#define NS_CC_PURPLE_LIMIT 200
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#define JAVASCRIPT nsIProgrammingLanguage::JAVASCRIPT
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// Large value used to specify that a script should run essentially forever
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#define NS_UNLIMITED_SCRIPT_RUNTIME (0x40000000LL << 32)
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// if you add statics here, add them to the list in nsJSRuntime::Startup
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static nsITimer *sGCTimer;
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static nsITimer *sShrinkGCBuffersTimer;
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static nsITimer *sCCTimer;
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static nsITimer *sFullGCTimer;
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static nsITimer *sInterSliceGCTimer;
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static PRTime sLastCCEndTime;
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static bool sCCLockedOut;
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static PRTime sCCLockedOutTime;
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static JS::GCSliceCallback sPrevGCSliceCallback;
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static js::AnalysisPurgeCallback sPrevAnalysisPurgeCallback;
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static bool sHasRunGC;
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// The number of currently pending document loads. This count isn't
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// guaranteed to always reflect reality and can't easily as we don't
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// have an easy place to know when a load ends or is interrupted in
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// all cases. This counter also gets reset if we end up GC'ing while
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// we're waiting for a slow page to load. IOW, this count may be 0
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// even when there are pending loads.
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static uint32_t sPendingLoadCount;
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static bool sLoadingInProgress;
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static uint32_t sCCollectedWaitingForGC;
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static uint32_t sLikelyShortLivingObjectsNeedingGC;
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static bool sPostGCEventsToConsole;
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static bool sPostGCEventsToObserver;
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static bool sDisableExplicitCompartmentGC;
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static uint32_t sCCTimerFireCount = 0;
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static uint32_t sMinForgetSkippableTime = UINT32_MAX;
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static uint32_t sMaxForgetSkippableTime = 0;
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static uint32_t sTotalForgetSkippableTime = 0;
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static uint32_t sRemovedPurples = 0;
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static uint32_t sForgetSkippableBeforeCC = 0;
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static uint32_t sPreviousSuspectedCount = 0;
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static uint32_t sCompartmentGCCount = NS_MAX_COMPARTMENT_GC_COUNT;
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static uint32_t sCleanupsSinceLastGC = UINT32_MAX;
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static bool sNeedsFullCC = false;
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static nsJSContext *sContextList = nullptr;
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static nsScriptNameSpaceManager *gNameSpaceManager;
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static nsIJSRuntimeService *sRuntimeService;
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JSRuntime *nsJSRuntime::sRuntime;
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static const char kJSRuntimeServiceContractID[] =
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"@mozilla.org/js/xpc/RuntimeService;1";
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static PRTime sFirstCollectionTime;
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static bool sIsInitialized;
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static bool sDidShutdown;
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static bool sShuttingDown;
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static int32_t sContextCount;
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static PRTime sMaxScriptRunTime;
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static PRTime sMaxChromeScriptRunTime;
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static nsIScriptSecurityManager *sSecurityManager;
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// nsJSEnvironmentObserver observes the memory-pressure notifications
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// and forces a garbage collection and cycle collection when it happens, if
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// the appropriate pref is set.
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static bool sGCOnMemoryPressure;
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static PRTime
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GetCollectionTimeDelta()
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{
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PRTime now = PR_Now();
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if (sFirstCollectionTime) {
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return now - sFirstCollectionTime;
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}
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sFirstCollectionTime = now;
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return 0;
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}
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static void
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KillTimers()
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{
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nsJSContext::KillGCTimer();
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nsJSContext::KillShrinkGCBuffersTimer();
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nsJSContext::KillCCTimer();
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nsJSContext::KillFullGCTimer();
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nsJSContext::KillInterSliceGCTimer();
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}
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class nsJSEnvironmentObserver MOZ_FINAL : public nsIObserver
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIOBSERVER
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};
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NS_IMPL_ISUPPORTS1(nsJSEnvironmentObserver, nsIObserver)
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NS_IMETHODIMP
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nsJSEnvironmentObserver::Observe(nsISupports* aSubject, const char* aTopic,
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const PRUnichar* aData)
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{
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if (sGCOnMemoryPressure && !nsCRT::strcmp(aTopic, "memory-pressure")) {
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if(StringBeginsWith(nsDependentString(aData),
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NS_LITERAL_STRING("low-memory-ongoing"))) {
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// Don't GC/CC if we are in an ongoing low-memory state since its very
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// slow and it likely won't help us anyway.
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return NS_OK;
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}
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nsJSContext::GarbageCollectNow(JS::gcreason::MEM_PRESSURE,
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nsJSContext::NonIncrementalGC,
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nsJSContext::NonCompartmentGC,
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nsJSContext::ShrinkingGC);
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nsJSContext::CycleCollectNow();
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} else if (!nsCRT::strcmp(aTopic, "quit-application")) {
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sShuttingDown = true;
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KillTimers();
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}
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return NS_OK;
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}
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class nsRootedJSValueArray {
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public:
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explicit nsRootedJSValueArray(JSContext *cx) : avr(cx, vals.Length(), vals.Elements()) {}
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void SetCapacity(JSContext *cx, size_t capacity) {
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vals.SetCapacity(capacity);
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// Values must be safe for the GC to inspect (they must not contain garbage).
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memset(vals.Elements(), 0, vals.Capacity() * sizeof(JS::Value));
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resetRooter(cx);
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}
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JS::Value *Elements() {
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return vals.Elements();
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}
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private:
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void resetRooter(JSContext *cx) {
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avr.changeArray(vals.Elements(), vals.Length());
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}
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nsAutoTArray<JS::Value, 16> vals;
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JS::AutoArrayRooter avr;
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};
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/****************************************************************
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************************** AutoFree ****************************
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****************************************************************/
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class AutoFree {
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public:
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AutoFree(void *aPtr) : mPtr(aPtr) {
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}
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~AutoFree() {
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if (mPtr)
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nsMemory::Free(mPtr);
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}
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void Invalidate() {
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mPtr = 0;
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}
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private:
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void *mPtr;
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};
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// A utility function for script languages to call. Although it looks small,
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// the use of nsIDocShell and nsPresContext triggers a huge number of
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// dependencies that most languages would not otherwise need.
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// XXXmarkh - This function is mis-placed!
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bool
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NS_HandleScriptError(nsIScriptGlobalObject *aScriptGlobal,
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nsScriptErrorEvent *aErrorEvent,
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nsEventStatus *aStatus)
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{
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bool called = false;
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nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(aScriptGlobal));
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nsIDocShell *docShell = win ? win->GetDocShell() : nullptr;
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if (docShell) {
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nsRefPtr<nsPresContext> presContext;
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docShell->GetPresContext(getter_AddRefs(presContext));
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static int32_t errorDepth; // Recursion prevention
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++errorDepth;
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if (presContext && errorDepth < 2) {
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// Dispatch() must be synchronous for the recursion block
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// (errorDepth) to work.
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nsEventDispatcher::Dispatch(win, presContext, aErrorEvent, nullptr,
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aStatus);
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called = true;
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}
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--errorDepth;
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}
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return called;
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}
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class ScriptErrorEvent : public nsRunnable
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{
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public:
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ScriptErrorEvent(nsIScriptGlobalObject* aScriptGlobal,
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nsIPrincipal* aScriptOriginPrincipal,
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uint32_t aLineNr, uint32_t aColumn, uint32_t aFlags,
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const nsAString& aErrorMsg,
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const nsAString& aFileName,
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const nsAString& aSourceLine,
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bool aDispatchEvent,
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uint64_t aInnerWindowID)
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: mScriptGlobal(aScriptGlobal), mOriginPrincipal(aScriptOriginPrincipal),
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mLineNr(aLineNr), mColumn(aColumn),
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mFlags(aFlags), mErrorMsg(aErrorMsg), mFileName(aFileName),
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mSourceLine(aSourceLine), mDispatchEvent(aDispatchEvent),
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mInnerWindowID(aInnerWindowID)
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{}
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NS_IMETHOD Run()
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{
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nsEventStatus status = nsEventStatus_eIgnore;
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// First, notify the DOM that we have a script error.
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if (mDispatchEvent) {
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nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(mScriptGlobal));
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nsIDocShell* docShell = win ? win->GetDocShell() : nullptr;
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if (docShell &&
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!JSREPORT_IS_WARNING(mFlags) &&
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!sHandlingScriptError) {
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sHandlingScriptError = true; // Recursion prevention
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nsRefPtr<nsPresContext> presContext;
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docShell->GetPresContext(getter_AddRefs(presContext));
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if (presContext) {
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nsScriptErrorEvent errorevent(true, NS_LOAD_ERROR);
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errorevent.fileName = mFileName.get();
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nsCOMPtr<nsIScriptObjectPrincipal> sop(do_QueryInterface(win));
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NS_ENSURE_STATE(sop);
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nsIPrincipal* p = sop->GetPrincipal();
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NS_ENSURE_STATE(p);
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bool sameOrigin = !mOriginPrincipal;
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if (p && !sameOrigin) {
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if (NS_FAILED(p->Subsumes(mOriginPrincipal, &sameOrigin))) {
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sameOrigin = false;
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}
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}
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NS_NAMED_LITERAL_STRING(xoriginMsg, "Script error.");
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if (sameOrigin) {
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errorevent.errorMsg = mErrorMsg.get();
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errorevent.lineNr = mLineNr;
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} else {
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NS_WARNING("Not same origin error!");
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errorevent.errorMsg = xoriginMsg.get();
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errorevent.lineNr = 0;
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}
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nsEventDispatcher::Dispatch(win, presContext, &errorevent, nullptr,
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&status);
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}
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sHandlingScriptError = false;
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}
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}
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if (status != nsEventStatus_eConsumeNoDefault) {
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// Make an nsIScriptError and populate it with information from
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// this error.
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nsCOMPtr<nsIScriptError> errorObject =
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do_CreateInstance("@mozilla.org/scripterror;1");
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if (errorObject != nullptr) {
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nsresult rv = NS_ERROR_NOT_AVAILABLE;
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// Set category to chrome or content
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nsCOMPtr<nsIScriptObjectPrincipal> scriptPrincipal =
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do_QueryInterface(mScriptGlobal);
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NS_ASSERTION(scriptPrincipal, "Global objects must implement "
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"nsIScriptObjectPrincipal");
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nsCOMPtr<nsIPrincipal> systemPrincipal;
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sSecurityManager->GetSystemPrincipal(getter_AddRefs(systemPrincipal));
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const char * category =
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scriptPrincipal->GetPrincipal() == systemPrincipal
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? "chrome javascript"
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: "content javascript";
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rv = errorObject->InitWithWindowID(mErrorMsg, mFileName,
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mSourceLine,
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mLineNr, mColumn, mFlags,
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category, mInnerWindowID);
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if (NS_SUCCEEDED(rv)) {
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nsCOMPtr<nsIConsoleService> consoleService =
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do_GetService(NS_CONSOLESERVICE_CONTRACTID, &rv);
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if (NS_SUCCEEDED(rv)) {
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consoleService->LogMessage(errorObject);
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}
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}
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}
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}
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return NS_OK;
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}
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nsCOMPtr<nsIScriptGlobalObject> mScriptGlobal;
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nsCOMPtr<nsIPrincipal> mOriginPrincipal;
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uint32_t mLineNr;
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uint32_t mColumn;
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uint32_t mFlags;
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nsString mErrorMsg;
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nsString mFileName;
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nsString mSourceLine;
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bool mDispatchEvent;
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uint64_t mInnerWindowID;
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static bool sHandlingScriptError;
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};
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bool ScriptErrorEvent::sHandlingScriptError = false;
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// NOTE: This function could be refactored to use the above. The only reason
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// it has not been done is that the code below only fills the error event
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// after it has a good nsPresContext - whereas using the above function
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// would involve always filling it. Is that a concern?
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void
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NS_ScriptErrorReporter(JSContext *cx,
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const char *message,
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JSErrorReport *report)
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{
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// We don't want to report exceptions too eagerly, but warnings in the
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// absence of werror are swallowed whole, so report those now.
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if (!JSREPORT_IS_WARNING(report->flags)) {
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if (JS_DescribeScriptedCaller(cx, nullptr, nullptr)) {
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return;
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}
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nsIXPConnect* xpc = nsContentUtils::XPConnect();
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|
if (xpc) {
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nsAXPCNativeCallContext *cc = nullptr;
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xpc->GetCurrentNativeCallContext(&cc);
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if (cc) {
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nsAXPCNativeCallContext *prev = cc;
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while (NS_SUCCEEDED(prev->GetPreviousCallContext(&prev)) && prev) {
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uint16_t lang;
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if (NS_SUCCEEDED(prev->GetLanguage(&lang)) &&
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lang == nsAXPCNativeCallContext::LANG_JS) {
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return;
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}
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}
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}
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}
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}
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// XXX this means we are not going to get error reports on non DOM contexts
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nsIScriptContext *context = nsJSUtils::GetDynamicScriptContext(cx);
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// Note: we must do this before running any more code on cx (if cx is the
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// dynamic script context).
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::JS_ClearPendingException(cx);
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if (context) {
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nsIScriptGlobalObject *globalObject = context->GetGlobalObject();
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if (globalObject) {
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nsAutoString fileName, msg;
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if (!report->filename) {
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fileName.SetIsVoid(true);
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} else {
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fileName.AssignWithConversion(report->filename);
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}
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|
|
const PRUnichar* m = static_cast<const PRUnichar*>(report->ucmessage);
|
|
if (m) {
|
|
const PRUnichar* n = static_cast<const PRUnichar*>
|
|
(js::GetErrorTypeName(cx, report->exnType));
|
|
if (n) {
|
|
msg.Assign(n);
|
|
msg.AppendLiteral(": ");
|
|
}
|
|
msg.Append(m);
|
|
}
|
|
|
|
if (msg.IsEmpty() && message) {
|
|
msg.AssignWithConversion(message);
|
|
}
|
|
|
|
|
|
/* We do not try to report Out Of Memory via a dom
|
|
* event because the dom event handler would encounter
|
|
* an OOM exception trying to process the event, and
|
|
* then we'd need to generate a new OOM event for that
|
|
* new OOM instance -- this isn't pretty.
|
|
*/
|
|
nsAutoString sourceLine;
|
|
sourceLine.Assign(reinterpret_cast<const PRUnichar*>(report->uclinebuf));
|
|
nsCOMPtr<nsPIDOMWindow> win = do_QueryInterface(globalObject);
|
|
uint64_t innerWindowID = 0;
|
|
if (win) {
|
|
nsCOMPtr<nsPIDOMWindow> innerWin = win->GetCurrentInnerWindow();
|
|
if (innerWin) {
|
|
innerWindowID = innerWin->WindowID();
|
|
}
|
|
}
|
|
nsContentUtils::AddScriptRunner(
|
|
new ScriptErrorEvent(globalObject,
|
|
nsJSPrincipals::get(report->originPrincipals),
|
|
report->lineno,
|
|
report->uctokenptr - report->uclinebuf,
|
|
report->flags, msg, fileName, sourceLine,
|
|
report->errorNumber != JSMSG_OUT_OF_MEMORY,
|
|
innerWindowID));
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
// Print it to stderr as well, for the benefit of those invoking
|
|
// mozilla with -console.
|
|
nsAutoCString error;
|
|
error.Assign("JavaScript ");
|
|
if (JSREPORT_IS_STRICT(report->flags))
|
|
error.Append("strict ");
|
|
if (JSREPORT_IS_WARNING(report->flags))
|
|
error.Append("warning: ");
|
|
else
|
|
error.Append("error: ");
|
|
error.Append(report->filename);
|
|
error.Append(", line ");
|
|
error.AppendInt(report->lineno, 10);
|
|
error.Append(": ");
|
|
if (report->ucmessage) {
|
|
AppendUTF16toUTF8(reinterpret_cast<const PRUnichar*>(report->ucmessage),
|
|
error);
|
|
} else {
|
|
error.Append(message);
|
|
}
|
|
|
|
fprintf(stderr, "%s\n", error.get());
|
|
fflush(stderr);
|
|
#endif
|
|
|
|
#ifdef PR_LOGGING
|
|
if (!gJSDiagnostics)
|
|
gJSDiagnostics = PR_NewLogModule("JSDiagnostics");
|
|
|
|
if (gJSDiagnostics) {
|
|
PR_LOG(gJSDiagnostics,
|
|
JSREPORT_IS_WARNING(report->flags) ? PR_LOG_WARNING : PR_LOG_ERROR,
|
|
("file %s, line %u: %s\n%s%s",
|
|
report->filename, report->lineno, message,
|
|
report->linebuf ? report->linebuf : "",
|
|
(report->linebuf &&
|
|
report->linebuf[strlen(report->linebuf)-1] != '\n')
|
|
? "\n"
|
|
: ""));
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
// A couple of useful functions to call when you're debugging.
|
|
nsGlobalWindow *
|
|
JSObject2Win(JSContext *cx, JSObject *obj)
|
|
{
|
|
nsIXPConnect *xpc = nsContentUtils::XPConnect();
|
|
if (!xpc) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsCOMPtr<nsIXPConnectWrappedNative> wrapper;
|
|
xpc->GetWrappedNativeOfJSObject(cx, obj, getter_AddRefs(wrapper));
|
|
if (wrapper) {
|
|
nsCOMPtr<nsPIDOMWindow> win = do_QueryWrappedNative(wrapper);
|
|
if (win) {
|
|
return static_cast<nsGlobalWindow *>
|
|
(static_cast<nsPIDOMWindow *>(win));
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
PrintWinURI(nsGlobalWindow *win)
|
|
{
|
|
if (!win) {
|
|
printf("No window passed in.\n");
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIDocument> doc = win->GetExtantDoc();
|
|
if (!doc) {
|
|
printf("No document in the window.\n");
|
|
return;
|
|
}
|
|
|
|
nsIURI *uri = doc->GetDocumentURI();
|
|
if (!uri) {
|
|
printf("Document doesn't have a URI.\n");
|
|
return;
|
|
}
|
|
|
|
nsAutoCString spec;
|
|
uri->GetSpec(spec);
|
|
printf("%s\n", spec.get());
|
|
}
|
|
|
|
void
|
|
PrintWinCodebase(nsGlobalWindow *win)
|
|
{
|
|
if (!win) {
|
|
printf("No window passed in.\n");
|
|
return;
|
|
}
|
|
|
|
nsIPrincipal *prin = win->GetPrincipal();
|
|
if (!prin) {
|
|
printf("Window doesn't have principals.\n");
|
|
return;
|
|
}
|
|
|
|
nsCOMPtr<nsIURI> uri;
|
|
prin->GetURI(getter_AddRefs(uri));
|
|
if (!uri) {
|
|
printf("No URI, maybe the system principal.\n");
|
|
return;
|
|
}
|
|
|
|
nsAutoCString spec;
|
|
uri->GetSpec(spec);
|
|
printf("%s\n", spec.get());
|
|
}
|
|
|
|
void
|
|
DumpString(const nsAString &str)
|
|
{
|
|
printf("%s\n", NS_ConvertUTF16toUTF8(str).get());
|
|
}
|
|
#endif
|
|
|
|
static already_AddRefed<nsIPrompt>
|
|
GetPromptFromContext(nsJSContext* ctx)
|
|
{
|
|
nsCOMPtr<nsPIDOMWindow> win(do_QueryInterface(ctx->GetGlobalObject()));
|
|
NS_ENSURE_TRUE(win, nullptr);
|
|
|
|
nsIDocShell *docShell = win->GetDocShell();
|
|
NS_ENSURE_TRUE(docShell, nullptr);
|
|
|
|
// Get the nsIPrompt interface from the docshell
|
|
nsCOMPtr<nsIPrompt> prompt = do_GetInterface(docShell);
|
|
return prompt.forget();
|
|
}
|
|
|
|
JSBool
|
|
nsJSContext::DOMOperationCallback(JSContext *cx)
|
|
{
|
|
nsresult rv;
|
|
|
|
// Get the native context
|
|
nsJSContext *ctx = static_cast<nsJSContext *>(::JS_GetContextPrivate(cx));
|
|
|
|
if (!ctx) {
|
|
// Can happen; see bug 355811
|
|
return JS_TRUE;
|
|
}
|
|
|
|
// XXX Save the operation callback time so we can restore it after the GC,
|
|
// because GCing can cause JS to run on our context, causing our
|
|
// ScriptEvaluated to be called, and clearing our operation callback time.
|
|
// See bug 302333.
|
|
PRTime callbackTime = ctx->mOperationCallbackTime;
|
|
PRTime modalStateTime = ctx->mModalStateTime;
|
|
|
|
// Now restore the callback time and count, in case they got reset.
|
|
ctx->mOperationCallbackTime = callbackTime;
|
|
ctx->mModalStateTime = modalStateTime;
|
|
|
|
PRTime now = PR_Now();
|
|
|
|
if (callbackTime == 0) {
|
|
// Initialize mOperationCallbackTime to start timing how long the
|
|
// script has run
|
|
ctx->mOperationCallbackTime = now;
|
|
return JS_TRUE;
|
|
}
|
|
|
|
if (ctx->mModalStateDepth) {
|
|
// We're waiting on a modal dialog, nothing more to do here.
|
|
return JS_TRUE;
|
|
}
|
|
|
|
PRTime duration = now - callbackTime;
|
|
|
|
// Check the amount of time this script has been running, or if the
|
|
// dialog is disabled.
|
|
JSObject* global = ::JS_GetGlobalForScopeChain(cx);
|
|
bool isTrackingChromeCodeTime =
|
|
global && xpc::AccessCheck::isChrome(js::GetObjectCompartment(global));
|
|
if (duration < (isTrackingChromeCodeTime ?
|
|
sMaxChromeScriptRunTime : sMaxScriptRunTime)) {
|
|
return JS_TRUE;
|
|
}
|
|
|
|
if (!nsContentUtils::IsSafeToRunScript()) {
|
|
// If it isn't safe to run script, then it isn't safe to bring up the
|
|
// prompt (since that will cause the event loop to spin). In this case
|
|
// (which is rare), we just stop the script... But report a warning so
|
|
// that developers have some idea of what went wrong.
|
|
|
|
JS_ReportWarning(cx, "A long running script was terminated");
|
|
return JS_FALSE;
|
|
}
|
|
|
|
// If we get here we're most likely executing an infinite loop in JS,
|
|
// we'll tell the user about this and we'll give the user the option
|
|
// of stopping the execution of the script.
|
|
nsCOMPtr<nsIPrompt> prompt = GetPromptFromContext(ctx);
|
|
NS_ENSURE_TRUE(prompt, JS_FALSE);
|
|
|
|
// Check if we should offer the option to debug
|
|
JSScript *script;
|
|
unsigned lineno;
|
|
JSBool hasFrame = ::JS_DescribeScriptedCaller(cx, &script, &lineno);
|
|
|
|
bool debugPossible = hasFrame && js::CanCallContextDebugHandler(cx);
|
|
#ifdef MOZ_JSDEBUGGER
|
|
// Get the debugger service if necessary.
|
|
if (debugPossible) {
|
|
bool jsds_IsOn = false;
|
|
const char jsdServiceCtrID[] = "@mozilla.org/js/jsd/debugger-service;1";
|
|
nsCOMPtr<jsdIExecutionHook> jsdHook;
|
|
nsCOMPtr<jsdIDebuggerService> jsds = do_GetService(jsdServiceCtrID, &rv);
|
|
|
|
// Check if there's a user for the debugger service that's 'on' for us
|
|
if (NS_SUCCEEDED(rv)) {
|
|
jsds->GetDebuggerHook(getter_AddRefs(jsdHook));
|
|
jsds->GetIsOn(&jsds_IsOn);
|
|
}
|
|
|
|
// If there is a debug handler registered for this runtime AND
|
|
// ((jsd is on AND has a hook) OR (jsd isn't on (something else debugs)))
|
|
// then something useful will be done with our request to debug.
|
|
debugPossible = ((jsds_IsOn && (jsdHook != nullptr)) || !jsds_IsOn);
|
|
}
|
|
#endif
|
|
|
|
// Get localizable strings
|
|
nsXPIDLString title, msg, stopButton, waitButton, debugButton, neverShowDlg;
|
|
|
|
rv = nsContentUtils::GetLocalizedString(nsContentUtils::eDOM_PROPERTIES,
|
|
"KillScriptTitle",
|
|
title);
|
|
|
|
nsresult tmp = nsContentUtils::GetLocalizedString(nsContentUtils::eDOM_PROPERTIES,
|
|
"StopScriptButton",
|
|
stopButton);
|
|
if (NS_FAILED(tmp)) {
|
|
rv = tmp;
|
|
}
|
|
|
|
tmp = nsContentUtils::GetLocalizedString(nsContentUtils::eDOM_PROPERTIES,
|
|
"WaitForScriptButton",
|
|
waitButton);
|
|
if (NS_FAILED(tmp)) {
|
|
rv = tmp;
|
|
}
|
|
|
|
tmp = nsContentUtils::GetLocalizedString(nsContentUtils::eDOM_PROPERTIES,
|
|
"DontAskAgain",
|
|
neverShowDlg);
|
|
if (NS_FAILED(tmp)) {
|
|
rv = tmp;
|
|
}
|
|
|
|
|
|
if (debugPossible) {
|
|
tmp = nsContentUtils::GetLocalizedString(nsContentUtils::eDOM_PROPERTIES,
|
|
"DebugScriptButton",
|
|
debugButton);
|
|
if (NS_FAILED(tmp)) {
|
|
rv = tmp;
|
|
}
|
|
|
|
tmp = nsContentUtils::GetLocalizedString(nsContentUtils::eDOM_PROPERTIES,
|
|
"KillScriptWithDebugMessage",
|
|
msg);
|
|
if (NS_FAILED(tmp)) {
|
|
rv = tmp;
|
|
}
|
|
}
|
|
else {
|
|
tmp = nsContentUtils::GetLocalizedString(nsContentUtils::eDOM_PROPERTIES,
|
|
"KillScriptMessage",
|
|
msg);
|
|
if (NS_FAILED(tmp)) {
|
|
rv = tmp;
|
|
}
|
|
}
|
|
|
|
//GetStringFromName can return NS_OK and still give NULL string
|
|
if (NS_FAILED(rv) || !title || !msg || !stopButton || !waitButton ||
|
|
(!debugButton && debugPossible) || !neverShowDlg) {
|
|
NS_ERROR("Failed to get localized strings.");
|
|
return JS_TRUE;
|
|
}
|
|
|
|
// Append file and line number information, if available
|
|
if (script) {
|
|
const char *filename = ::JS_GetScriptFilename(cx, script);
|
|
if (filename) {
|
|
nsXPIDLString scriptLocation;
|
|
NS_ConvertUTF8toUTF16 filenameUTF16(filename);
|
|
const PRUnichar *formatParams[] = { filenameUTF16.get() };
|
|
rv = nsContentUtils::FormatLocalizedString(nsContentUtils::eDOM_PROPERTIES,
|
|
"KillScriptLocation",
|
|
formatParams,
|
|
scriptLocation);
|
|
|
|
if (NS_SUCCEEDED(rv) && scriptLocation) {
|
|
msg.AppendLiteral("\n\n");
|
|
msg.Append(scriptLocation);
|
|
msg.Append(':');
|
|
msg.AppendInt(lineno);
|
|
}
|
|
}
|
|
}
|
|
|
|
int32_t buttonPressed = 0; //In case user exits dialog by clicking X
|
|
bool neverShowDlgChk = false;
|
|
uint32_t buttonFlags = nsIPrompt::BUTTON_POS_1_DEFAULT +
|
|
(nsIPrompt::BUTTON_TITLE_IS_STRING *
|
|
(nsIPrompt::BUTTON_POS_0 + nsIPrompt::BUTTON_POS_1));
|
|
|
|
// Add a third button if necessary:
|
|
if (debugPossible)
|
|
buttonFlags += nsIPrompt::BUTTON_TITLE_IS_STRING * nsIPrompt::BUTTON_POS_2;
|
|
|
|
// Null out the operation callback while we're re-entering JS here.
|
|
::JS_SetOperationCallback(cx, nullptr);
|
|
|
|
// Open the dialog.
|
|
rv = prompt->ConfirmEx(title, msg, buttonFlags, waitButton, stopButton,
|
|
debugButton, neverShowDlg, &neverShowDlgChk,
|
|
&buttonPressed);
|
|
|
|
::JS_SetOperationCallback(cx, DOMOperationCallback);
|
|
|
|
if (NS_SUCCEEDED(rv) && (buttonPressed == 0)) {
|
|
// Allow the script to continue running
|
|
|
|
if (neverShowDlgChk) {
|
|
if (isTrackingChromeCodeTime) {
|
|
Preferences::SetInt("dom.max_chrome_script_run_time", 0);
|
|
sMaxChromeScriptRunTime = NS_UNLIMITED_SCRIPT_RUNTIME;
|
|
} else {
|
|
Preferences::SetInt("dom.max_script_run_time", 0);
|
|
sMaxScriptRunTime = NS_UNLIMITED_SCRIPT_RUNTIME;
|
|
}
|
|
}
|
|
|
|
ctx->mOperationCallbackTime = PR_Now();
|
|
return JS_TRUE;
|
|
}
|
|
else if ((buttonPressed == 2) && debugPossible) {
|
|
return js_CallContextDebugHandler(cx);
|
|
}
|
|
|
|
JS_ClearPendingException(cx);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
void
|
|
nsJSContext::EnterModalState()
|
|
{
|
|
if (!mModalStateDepth) {
|
|
mModalStateTime = mOperationCallbackTime ? PR_Now() : 0;
|
|
}
|
|
++mModalStateDepth;
|
|
}
|
|
|
|
void
|
|
nsJSContext::LeaveModalState()
|
|
{
|
|
if (!mModalStateDepth) {
|
|
NS_ERROR("Uh, mismatched LeaveModalState() call!");
|
|
|
|
return;
|
|
}
|
|
|
|
--mModalStateDepth;
|
|
|
|
// If we're still in a modal dialog, or mOperationCallbackTime is still
|
|
// uninitialized, do nothing.
|
|
if (mModalStateDepth || !mOperationCallbackTime) {
|
|
return;
|
|
}
|
|
|
|
// If mOperationCallbackTime was set when we entered the first dialog
|
|
// (and mModalStateTime is thus non-zero), adjust mOperationCallbackTime
|
|
// to account for time spent in the dialog.
|
|
// If mOperationCallbackTime got set while the modal dialog was open,
|
|
// simply set mOperationCallbackTime to the closing time of the dialog so
|
|
// that we never adjust mOperationCallbackTime to be in the future.
|
|
if (mModalStateTime) {
|
|
mOperationCallbackTime += PR_Now() - mModalStateTime;
|
|
}
|
|
else {
|
|
mOperationCallbackTime = PR_Now();
|
|
}
|
|
}
|
|
|
|
#define JS_OPTIONS_DOT_STR "javascript.options."
|
|
|
|
static const char js_options_dot_str[] = JS_OPTIONS_DOT_STR;
|
|
static const char js_strict_option_str[] = JS_OPTIONS_DOT_STR "strict";
|
|
#ifdef DEBUG
|
|
static const char js_strict_debug_option_str[] = JS_OPTIONS_DOT_STR "strict.debug";
|
|
#endif
|
|
static const char js_werror_option_str[] = JS_OPTIONS_DOT_STR "werror";
|
|
#ifdef JS_GC_ZEAL
|
|
static const char js_zeal_option_str[] = JS_OPTIONS_DOT_STR "gczeal";
|
|
static const char js_zeal_frequency_str[] = JS_OPTIONS_DOT_STR "gczeal.frequency";
|
|
#endif
|
|
static const char js_methodjit_content_str[] = JS_OPTIONS_DOT_STR "methodjit.content";
|
|
static const char js_methodjit_chrome_str[] = JS_OPTIONS_DOT_STR "methodjit.chrome";
|
|
static const char js_methodjit_always_str[] = JS_OPTIONS_DOT_STR "methodjit_always";
|
|
static const char js_typeinfer_str[] = JS_OPTIONS_DOT_STR "typeinference";
|
|
static const char js_pccounts_content_str[] = JS_OPTIONS_DOT_STR "pccounts.content";
|
|
static const char js_pccounts_chrome_str[] = JS_OPTIONS_DOT_STR "pccounts.chrome";
|
|
static const char js_jit_hardening_str[] = JS_OPTIONS_DOT_STR "jit_hardening";
|
|
static const char js_memlog_option_str[] = JS_OPTIONS_DOT_STR "mem.log";
|
|
static const char js_memnotify_option_str[] = JS_OPTIONS_DOT_STR "mem.notify";
|
|
static const char js_disable_explicit_compartment_gc[] =
|
|
JS_OPTIONS_DOT_STR "mem.disable_explicit_compartment_gc";
|
|
static const char js_baselinejit_content_str[] = JS_OPTIONS_DOT_STR "baselinejit.content";
|
|
static const char js_baselinejit_chrome_str[] = JS_OPTIONS_DOT_STR "baselinejit.chrome";
|
|
static const char js_ion_content_str[] = JS_OPTIONS_DOT_STR "ion.content";
|
|
static const char js_asmjs_content_str[] = JS_OPTIONS_DOT_STR "experimental_asmjs";
|
|
static const char js_ion_parallel_compilation_str[] = JS_OPTIONS_DOT_STR "ion.parallel_compilation";
|
|
|
|
int
|
|
nsJSContext::JSOptionChangedCallback(const char *pref, void *data)
|
|
{
|
|
nsJSContext *context = reinterpret_cast<nsJSContext *>(data);
|
|
uint32_t oldDefaultJSOptions = context->mDefaultJSOptions;
|
|
uint32_t newDefaultJSOptions = oldDefaultJSOptions;
|
|
|
|
sPostGCEventsToConsole = Preferences::GetBool(js_memlog_option_str);
|
|
sPostGCEventsToObserver = Preferences::GetBool(js_memnotify_option_str);
|
|
sDisableExplicitCompartmentGC =
|
|
Preferences::GetBool(js_disable_explicit_compartment_gc);
|
|
|
|
bool strict = Preferences::GetBool(js_strict_option_str);
|
|
if (strict)
|
|
newDefaultJSOptions |= JSOPTION_STRICT;
|
|
else
|
|
newDefaultJSOptions &= ~JSOPTION_STRICT;
|
|
|
|
// The vanilla GetGlobalObject returns null if a global isn't set up on
|
|
// the context yet. We can sometimes be call midway through context init,
|
|
// So ask for the member directly instead.
|
|
nsIScriptGlobalObject *global = context->GetGlobalObjectRef();
|
|
|
|
// XXX should we check for sysprin instead of a chrome window, to make
|
|
// XXX components be covered by the chrome pref instead of the content one?
|
|
nsCOMPtr<nsIDOMWindow> contentWindow(do_QueryInterface(global));
|
|
nsCOMPtr<nsIDOMChromeWindow> chromeWindow(do_QueryInterface(global));
|
|
|
|
bool useMethodJIT = Preferences::GetBool(chromeWindow || !contentWindow ?
|
|
js_methodjit_chrome_str :
|
|
js_methodjit_content_str);
|
|
bool usePCCounts = Preferences::GetBool(chromeWindow || !contentWindow ?
|
|
js_pccounts_chrome_str :
|
|
js_pccounts_content_str);
|
|
bool useMethodJITAlways = Preferences::GetBool(js_methodjit_always_str);
|
|
bool useTypeInference = !chromeWindow && contentWindow && Preferences::GetBool(js_typeinfer_str);
|
|
bool useHardening = Preferences::GetBool(js_jit_hardening_str);
|
|
bool useBaselineJIT = Preferences::GetBool(chromeWindow || !contentWindow ?
|
|
js_baselinejit_chrome_str :
|
|
js_baselinejit_content_str);
|
|
bool useIon = Preferences::GetBool(js_ion_content_str);
|
|
bool useAsmJS = Preferences::GetBool(js_asmjs_content_str);
|
|
bool parallelIonCompilation = Preferences::GetBool(js_ion_parallel_compilation_str);
|
|
nsCOMPtr<nsIXULRuntime> xr = do_GetService(XULRUNTIME_SERVICE_CONTRACTID);
|
|
if (xr) {
|
|
bool safeMode = false;
|
|
xr->GetInSafeMode(&safeMode);
|
|
if (safeMode) {
|
|
useMethodJIT = false;
|
|
usePCCounts = false;
|
|
useTypeInference = false;
|
|
useMethodJITAlways = true;
|
|
useHardening = false;
|
|
useBaselineJIT = false;
|
|
useIon = false;
|
|
useAsmJS = false;
|
|
}
|
|
}
|
|
|
|
if (useMethodJIT)
|
|
newDefaultJSOptions |= JSOPTION_METHODJIT;
|
|
else
|
|
newDefaultJSOptions &= ~JSOPTION_METHODJIT;
|
|
|
|
if (usePCCounts)
|
|
newDefaultJSOptions |= JSOPTION_PCCOUNT;
|
|
else
|
|
newDefaultJSOptions &= ~JSOPTION_PCCOUNT;
|
|
|
|
if (useMethodJITAlways)
|
|
newDefaultJSOptions |= JSOPTION_METHODJIT_ALWAYS;
|
|
else
|
|
newDefaultJSOptions &= ~JSOPTION_METHODJIT_ALWAYS;
|
|
|
|
if (useTypeInference)
|
|
newDefaultJSOptions |= JSOPTION_TYPE_INFERENCE;
|
|
else
|
|
newDefaultJSOptions &= ~JSOPTION_TYPE_INFERENCE;
|
|
|
|
if (useBaselineJIT)
|
|
newDefaultJSOptions |= JSOPTION_BASELINE;
|
|
else
|
|
newDefaultJSOptions &= ~JSOPTION_BASELINE;
|
|
|
|
if (useIon)
|
|
newDefaultJSOptions |= JSOPTION_ION;
|
|
else
|
|
newDefaultJSOptions &= ~JSOPTION_ION;
|
|
|
|
if (useAsmJS)
|
|
newDefaultJSOptions |= JSOPTION_ASMJS;
|
|
else
|
|
newDefaultJSOptions &= ~JSOPTION_ASMJS;
|
|
|
|
#ifdef DEBUG
|
|
// In debug builds, warnings are enabled in chrome context if
|
|
// javascript.options.strict.debug is true
|
|
bool strictDebug = Preferences::GetBool(js_strict_debug_option_str);
|
|
if (strictDebug && (newDefaultJSOptions & JSOPTION_STRICT) == 0) {
|
|
if (chromeWindow || !contentWindow)
|
|
newDefaultJSOptions |= JSOPTION_STRICT;
|
|
}
|
|
#endif
|
|
|
|
bool werror = Preferences::GetBool(js_werror_option_str);
|
|
if (werror)
|
|
newDefaultJSOptions |= JSOPTION_WERROR;
|
|
else
|
|
newDefaultJSOptions &= ~JSOPTION_WERROR;
|
|
|
|
::JS_SetOptions(context->mContext, newDefaultJSOptions & JSOPTION_MASK);
|
|
|
|
::JS_SetParallelCompilationEnabled(context->mContext, parallelIonCompilation);
|
|
|
|
// Save the new defaults for the next page load (InitContext).
|
|
context->mDefaultJSOptions = newDefaultJSOptions;
|
|
|
|
JSRuntime *rt = JS_GetRuntime(context->mContext);
|
|
JS_SetJitHardening(rt, useHardening);
|
|
|
|
#ifdef JS_GC_ZEAL
|
|
int32_t zeal = Preferences::GetInt(js_zeal_option_str, -1);
|
|
int32_t frequency = Preferences::GetInt(js_zeal_frequency_str, JS_DEFAULT_ZEAL_FREQ);
|
|
if (zeal >= 0)
|
|
::JS_SetGCZeal(context->mContext, (uint8_t)zeal, frequency);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
nsJSContext::nsJSContext(JSRuntime *aRuntime, bool aGCOnDestruction,
|
|
nsIScriptGlobalObject* aGlobalObject)
|
|
: mActive(false)
|
|
, mGCOnDestruction(aGCOnDestruction)
|
|
, mExecuteDepth(0)
|
|
, mGlobalObjectRef(aGlobalObject)
|
|
{
|
|
mNext = sContextList;
|
|
mPrev = &sContextList;
|
|
if (sContextList) {
|
|
sContextList->mPrev = &mNext;
|
|
}
|
|
sContextList = this;
|
|
|
|
++sContextCount;
|
|
|
|
mDefaultJSOptions = JSOPTION_PRIVATE_IS_NSISUPPORTS;
|
|
|
|
mContext = ::JS_NewContext(aRuntime, gStackSize);
|
|
if (mContext) {
|
|
::JS_SetContextPrivate(mContext, static_cast<nsIScriptContext *>(this));
|
|
|
|
// Preserve any flags the context callback might have set.
|
|
mDefaultJSOptions |= ::JS_GetOptions(mContext);
|
|
|
|
// Make sure the new context gets the default context options
|
|
::JS_SetOptions(mContext, mDefaultJSOptions);
|
|
|
|
// Watch for the JS boolean options
|
|
Preferences::RegisterCallback(JSOptionChangedCallback,
|
|
js_options_dot_str, this);
|
|
|
|
::JS_SetOperationCallback(mContext, DOMOperationCallback);
|
|
}
|
|
mIsInitialized = false;
|
|
mTerminations = nullptr;
|
|
mScriptsEnabled = true;
|
|
mOperationCallbackTime = 0;
|
|
mModalStateTime = 0;
|
|
mModalStateDepth = 0;
|
|
mProcessingScriptTag = false;
|
|
}
|
|
|
|
nsJSContext::~nsJSContext()
|
|
{
|
|
*mPrev = mNext;
|
|
if (mNext) {
|
|
mNext->mPrev = mPrev;
|
|
}
|
|
|
|
// We may still have pending termination functions if the context is destroyed
|
|
// before they could be executed. In this case, free the references to their
|
|
// parameters, but don't execute the functions (see bug 622326).
|
|
delete mTerminations;
|
|
|
|
mGlobalObjectRef = nullptr;
|
|
|
|
DestroyJSContext();
|
|
|
|
--sContextCount;
|
|
|
|
if (!sContextCount && sDidShutdown) {
|
|
// The last context is being deleted, and we're already in the
|
|
// process of shutting down, release the JS runtime service, and
|
|
// the security manager.
|
|
|
|
NS_IF_RELEASE(sRuntimeService);
|
|
NS_IF_RELEASE(sSecurityManager);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsJSContext::DestroyJSContext()
|
|
{
|
|
if (!mContext) {
|
|
return;
|
|
}
|
|
|
|
// Clear our entry in the JSContext, bugzilla bug 66413
|
|
::JS_SetContextPrivate(mContext, nullptr);
|
|
|
|
// Unregister our "javascript.options.*" pref-changed callback.
|
|
Preferences::UnregisterCallback(JSOptionChangedCallback,
|
|
js_options_dot_str, this);
|
|
|
|
if (mGCOnDestruction) {
|
|
PokeGC(JS::gcreason::NSJSCONTEXT_DESTROY);
|
|
}
|
|
|
|
// Let xpconnect destroy the JSContext when it thinks the time is right.
|
|
nsIXPConnect *xpc = nsContentUtils::XPConnect();
|
|
if (xpc) {
|
|
xpc->ReleaseJSContext(mContext, true);
|
|
} else {
|
|
::JS_DestroyContextNoGC(mContext);
|
|
}
|
|
mContext = nullptr;
|
|
}
|
|
|
|
// QueryInterface implementation for nsJSContext
|
|
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsJSContext)
|
|
NS_IMPL_CYCLE_COLLECTION_TRACE_END
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsJSContext)
|
|
NS_ASSERTION(!tmp->mContext || !js::ContextHasOutstandingRequests(tmp->mContext),
|
|
"Trying to unlink a context with outstanding requests.");
|
|
tmp->mIsInitialized = false;
|
|
tmp->mGCOnDestruction = false;
|
|
if (tmp->mContext) {
|
|
JSAutoRequest ar(tmp->mContext);
|
|
JS_SetGlobalObject(tmp->mContext, nullptr);
|
|
}
|
|
tmp->DestroyJSContext();
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK(mGlobalObjectRef)
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(nsJSContext)
|
|
NS_IMPL_CYCLE_COLLECTION_DESCRIBE(nsJSContext, tmp->GetCCRefcnt())
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mGlobalObjectRef)
|
|
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mContext");
|
|
nsContentUtils::XPConnect()->NoteJSContext(tmp->mContext, cb);
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsJSContext)
|
|
NS_INTERFACE_MAP_ENTRY(nsIScriptContext)
|
|
NS_INTERFACE_MAP_ENTRY(nsIScriptContextPrincipal)
|
|
NS_INTERFACE_MAP_ENTRY(nsIXPCScriptNotify)
|
|
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIScriptContext)
|
|
NS_INTERFACE_MAP_END
|
|
|
|
|
|
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsJSContext)
|
|
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsJSContext)
|
|
|
|
nsrefcnt
|
|
nsJSContext::GetCCRefcnt()
|
|
{
|
|
nsrefcnt refcnt = mRefCnt.get();
|
|
|
|
// In the (abnormal) case of synchronous cycle-collection, the context may be
|
|
// actively running JS code in which case we must keep it alive by adding an
|
|
// extra refcount.
|
|
if (mContext && js::ContextHasOutstandingRequests(mContext)) {
|
|
refcnt++;
|
|
}
|
|
|
|
return refcnt;
|
|
}
|
|
|
|
nsresult
|
|
nsJSContext::EvaluateString(const nsAString& aScript,
|
|
JSObject& aScopeObject,
|
|
JS::CompileOptions& aOptions,
|
|
bool aCoerceToString,
|
|
JS::Value* aRetValue)
|
|
{
|
|
PROFILER_LABEL("JS", "EvaluateString");
|
|
MOZ_ASSERT_IF(aOptions.versionSet, aOptions.version != JSVERSION_UNKNOWN);
|
|
MOZ_ASSERT_IF(aCoerceToString, aRetValue);
|
|
NS_ENSURE_TRUE(mIsInitialized, NS_ERROR_NOT_INITIALIZED);
|
|
// Unfortunately, the JS engine actually compiles scripts with a return value
|
|
// in a different, less efficient way. Furthermore, it can't JIT them in many
|
|
// cases. So we need to be explicitly told whether the caller cares about the
|
|
// return value. Callers use null to indicate they don't care.
|
|
if (aRetValue) {
|
|
*aRetValue = JSVAL_VOID;
|
|
}
|
|
|
|
if (!mScriptsEnabled) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCxPusher pusher;
|
|
pusher.Push(mContext);
|
|
|
|
xpc_UnmarkGrayObject(&aScopeObject);
|
|
nsAutoMicroTask mt;
|
|
|
|
JSPrincipals* p = JS_GetCompartmentPrincipals(js::GetObjectCompartment(&aScopeObject));
|
|
aOptions.setPrincipals(p);
|
|
|
|
bool ok = false;
|
|
nsresult rv = sSecurityManager->CanExecuteScripts(mContext, nsJSPrincipals::get(p), &ok);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
NS_ENSURE_TRUE(ok, NS_OK);
|
|
|
|
nsJSContext::TerminationFuncHolder holder(this);
|
|
|
|
// Scope the JSAutoCompartment so that it gets destroyed before we pop the
|
|
// cx and potentially call JS_RestoreFrameChain.
|
|
XPCAutoRequest ar(mContext);
|
|
{
|
|
JSAutoCompartment ac(mContext, &aScopeObject);
|
|
|
|
++mExecuteDepth;
|
|
|
|
JS::RootedObject rootedScope(mContext, &aScopeObject);
|
|
ok = JS::Evaluate(mContext, rootedScope, aOptions,
|
|
PromiseFlatString(aScript).get(),
|
|
aScript.Length(), aRetValue);
|
|
if (ok && aCoerceToString && !aRetValue->isUndefined()) {
|
|
JSString* str = JS_ValueToString(mContext, *aRetValue);
|
|
ok = !!str;
|
|
*aRetValue = ok ? JS::StringValue(str) : JS::UndefinedValue();
|
|
}
|
|
--mExecuteDepth;
|
|
}
|
|
|
|
if (!ok) {
|
|
if (aRetValue) {
|
|
*aRetValue = JS::UndefinedValue();
|
|
}
|
|
// Tell XPConnect about any pending exceptions. This is needed
|
|
// to avoid dropping JS exceptions in case we got here through
|
|
// nested calls through XPConnect.
|
|
ReportPendingException();
|
|
}
|
|
|
|
// ScriptEvaluated needs to come after we pop the stack
|
|
pusher.Pop();
|
|
ScriptEvaluated(true);
|
|
|
|
// Wrap the return value into whatever compartment mContext was in.
|
|
if (aRetValue && !JS_WrapValue(mContext, aRetValue))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIScriptObjectPrincipal*
|
|
nsJSContext::GetObjectPrincipal()
|
|
{
|
|
nsCOMPtr<nsIScriptObjectPrincipal> prin = do_QueryInterface(GetGlobalObject());
|
|
return prin;
|
|
}
|
|
|
|
nsresult
|
|
nsJSContext::CompileScript(const PRUnichar* aText,
|
|
int32_t aTextLength,
|
|
nsIPrincipal *aPrincipal,
|
|
const char *aURL,
|
|
uint32_t aLineNo,
|
|
uint32_t aVersion,
|
|
JS::MutableHandle<JSScript*> aScriptObject,
|
|
bool aSaveSource /* = false */)
|
|
{
|
|
PROFILER_LABEL_PRINTF("JS", "Compile Script", "%s", aURL ? aURL : "");
|
|
NS_ENSURE_TRUE(mIsInitialized, NS_ERROR_NOT_INITIALIZED);
|
|
|
|
NS_ENSURE_ARG_POINTER(aPrincipal);
|
|
|
|
JSObject* scopeObject = ::JS_GetGlobalObject(mContext);
|
|
xpc_UnmarkGrayObject(scopeObject);
|
|
|
|
bool ok = false;
|
|
|
|
nsresult rv = sSecurityManager->CanExecuteScripts(mContext, aPrincipal, &ok);
|
|
if (NS_FAILED(rv)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
aScriptObject.set(nullptr); // ensure old object not used on failure...
|
|
|
|
// Don't compile if SecurityManager said "not ok" or aVersion is unknown.
|
|
// Since the caller is responsible for parsing the version strings, we just
|
|
// check it isn't JSVERSION_UNKNOWN.
|
|
if (!ok || JSVersion(aVersion) == JSVERSION_UNKNOWN)
|
|
return NS_OK;
|
|
|
|
XPCAutoRequest ar(mContext);
|
|
|
|
|
|
JS::CompileOptions options(mContext);
|
|
JS::CompileOptions::SourcePolicy sp = aSaveSource ?
|
|
JS::CompileOptions::SAVE_SOURCE :
|
|
JS::CompileOptions::LAZY_SOURCE;
|
|
options.setPrincipals(nsJSPrincipals::get(aPrincipal))
|
|
.setFileAndLine(aURL, aLineNo)
|
|
.setVersion(JSVersion(aVersion))
|
|
.setSourcePolicy(sp);
|
|
JS::RootedObject rootedScope(mContext, scopeObject);
|
|
JSScript* script = JS::Compile(mContext,
|
|
rootedScope,
|
|
options,
|
|
static_cast<const jschar*>(aText),
|
|
aTextLength);
|
|
if (!script) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
aScriptObject.set(script);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsJSContext::ExecuteScript(JSScript* aScriptObject,
|
|
JSObject* aScopeObject)
|
|
{
|
|
NS_ENSURE_TRUE(mIsInitialized, NS_ERROR_NOT_INITIALIZED);
|
|
|
|
if (!mScriptsEnabled) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsAutoMicroTask mt;
|
|
|
|
if (!aScopeObject) {
|
|
aScopeObject = JS_GetGlobalObject(mContext);
|
|
}
|
|
|
|
xpc_UnmarkGrayScript(aScriptObject);
|
|
xpc_UnmarkGrayObject(aScopeObject);
|
|
|
|
// Push our JSContext on our thread's context stack, in case native code
|
|
// called from JS calls back into JS via XPConnect.
|
|
nsCxPusher pusher;
|
|
pusher.Push(mContext);
|
|
|
|
nsJSContext::TerminationFuncHolder holder(this);
|
|
XPCAutoRequest ar(mContext);
|
|
|
|
// Scope the JSAutoCompartment so that it gets destroyed before we pop the
|
|
// cx and potentially call JS_RestoreFrameChain.
|
|
{
|
|
JSAutoCompartment ac(mContext, aScopeObject);
|
|
++mExecuteDepth;
|
|
|
|
// The result of evaluation, used only if there were no errors. This need
|
|
// not be a GC root currently, provided we run the GC only from the
|
|
// operation callback or from ScriptEvaluated.
|
|
JS::Value val;
|
|
if (!JS_ExecuteScript(mContext, aScopeObject, aScriptObject, &val)) {
|
|
ReportPendingException();
|
|
}
|
|
--mExecuteDepth;
|
|
}
|
|
|
|
// Pop here, after JS_ValueToString and any other possible evaluation.
|
|
pusher.Pop();
|
|
|
|
// ScriptEvaluated needs to come after we pop the stack
|
|
ScriptEvaluated(true);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
#ifdef DEBUG
|
|
bool
|
|
AtomIsEventHandlerName(nsIAtom *aName)
|
|
{
|
|
const PRUnichar *name = aName->GetUTF16String();
|
|
|
|
const PRUnichar *cp;
|
|
PRUnichar c;
|
|
for (cp = name; *cp != '\0'; ++cp)
|
|
{
|
|
c = *cp;
|
|
if ((c < 'A' || c > 'Z') && (c < 'a' || c > 'z'))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
// Helper function to find the JSObject associated with a (presumably DOM)
|
|
// interface.
|
|
nsresult
|
|
nsJSContext::JSObjectFromInterface(nsISupports* aTarget, JSObject* aScope, JSObject** aRet)
|
|
{
|
|
// It is legal to specify a null target.
|
|
if (!aTarget) {
|
|
*aRet = nullptr;
|
|
return NS_OK;
|
|
}
|
|
|
|
// Get the jsobject associated with this target
|
|
// We don't wrap here because we trust the JS engine to wrap the target
|
|
// later.
|
|
JS::Value v;
|
|
nsresult rv = nsContentUtils::WrapNative(mContext, aScope, aTarget, &v);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
#ifdef DEBUG
|
|
nsCOMPtr<nsISupports> targetSupp = do_QueryInterface(aTarget);
|
|
nsCOMPtr<nsISupports> native =
|
|
nsContentUtils::XPConnect()->GetNativeOfWrapper(mContext,
|
|
JSVAL_TO_OBJECT(v));
|
|
NS_ASSERTION(native == targetSupp, "Native should be the target!");
|
|
#endif
|
|
|
|
*aRet = xpc_UnmarkGrayObject(JSVAL_TO_OBJECT(v));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
nsresult
|
|
nsJSContext::BindCompiledEventHandler(nsISupports* aTarget, JSObject* aScope,
|
|
JSObject* aHandler,
|
|
JS::MutableHandle<JSObject*> aBoundHandler)
|
|
{
|
|
NS_ENSURE_ARG(aHandler);
|
|
NS_ENSURE_TRUE(mIsInitialized, NS_ERROR_NOT_INITIALIZED);
|
|
NS_PRECONDITION(!aBoundHandler, "Shouldn't already have a bound handler!");
|
|
|
|
xpc_UnmarkGrayObject(aScope);
|
|
xpc_UnmarkGrayObject(aHandler);
|
|
|
|
XPCAutoRequest ar(mContext);
|
|
|
|
// Get the jsobject associated with this target
|
|
JSObject *target = nullptr;
|
|
nsresult rv = JSObjectFromInterface(aTarget, aScope, &target);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
JSAutoCompartment ac(mContext, aHandler);
|
|
NS_ASSERTION(JS_TypeOfValue(mContext,
|
|
OBJECT_TO_JSVAL(aHandler)) == JSTYPE_FUNCTION,
|
|
"Event handler object not a function");
|
|
}
|
|
#endif
|
|
|
|
JSAutoCompartment ac(mContext, target);
|
|
|
|
JSObject* funobj;
|
|
// Make sure the handler function is parented by its event target object
|
|
if (aHandler) {
|
|
funobj = JS_CloneFunctionObject(mContext, aHandler, target);
|
|
if (!funobj) {
|
|
rv = NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
} else {
|
|
funobj = NULL;
|
|
}
|
|
|
|
aBoundHandler.set(funobj);
|
|
|
|
return rv;
|
|
}
|
|
|
|
// serialization
|
|
nsresult
|
|
nsJSContext::Serialize(nsIObjectOutputStream* aStream, JSScript* aScriptObject)
|
|
{
|
|
if (!aScriptObject)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
return nsContentUtils::XPConnect()->WriteScript(aStream, mContext,
|
|
xpc_UnmarkGrayScript(aScriptObject));
|
|
}
|
|
|
|
nsresult
|
|
nsJSContext::Deserialize(nsIObjectInputStream* aStream,
|
|
JS::MutableHandle<JSScript*> aResult)
|
|
{
|
|
JSScript *script;
|
|
nsresult rv = nsContentUtils::XPConnect()->ReadScript(aStream, mContext, &script);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
aResult.set(script);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIScriptGlobalObject *
|
|
nsJSContext::GetGlobalObject()
|
|
{
|
|
JSObject *global = ::JS_GetGlobalObject(mContext);
|
|
|
|
if (!global) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (mGlobalObjectRef)
|
|
return mGlobalObjectRef;
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
JSObject *inner = JS_ObjectToInnerObject(mContext, global);
|
|
|
|
// If this assertion hits then it means that we have a window object as
|
|
// our global, but we never called CreateOuterObject.
|
|
NS_ASSERTION(inner == global, "Shouldn't be able to innerize here");
|
|
}
|
|
#endif
|
|
|
|
JSClass *c = JS_GetClass(global);
|
|
|
|
// Whenever we end up with globals that are JSCLASS_IS_DOMJSCLASS
|
|
// and have an nsISupports DOM object, we will need to modify this
|
|
// check here.
|
|
MOZ_ASSERT(!(c->flags & JSCLASS_IS_DOMJSCLASS));
|
|
if ((~c->flags) & (JSCLASS_HAS_PRIVATE |
|
|
JSCLASS_PRIVATE_IS_NSISUPPORTS)) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsISupports *priv = static_cast<nsISupports*>(js::GetObjectPrivate(global));
|
|
|
|
nsCOMPtr<nsIXPConnectWrappedNative> wrapped_native =
|
|
do_QueryInterface(priv);
|
|
|
|
nsCOMPtr<nsIScriptGlobalObject> sgo;
|
|
if (wrapped_native) {
|
|
// The global object is a XPConnect wrapped native, the native in
|
|
// the wrapper might be the nsIScriptGlobalObject
|
|
|
|
sgo = do_QueryWrappedNative(wrapped_native);
|
|
} else {
|
|
sgo = do_QueryInterface(priv);
|
|
}
|
|
|
|
// This'll return a pointer to something we're about to release, but
|
|
// that's ok, the JS object will hold it alive long enough.
|
|
return sgo;
|
|
}
|
|
|
|
JSObject*
|
|
nsJSContext::GetNativeGlobal()
|
|
{
|
|
return JS_GetGlobalObject(mContext);
|
|
}
|
|
|
|
JSContext*
|
|
nsJSContext::GetNativeContext()
|
|
{
|
|
return xpc_UnmarkGrayContext(mContext);
|
|
}
|
|
|
|
nsresult
|
|
nsJSContext::InitContext()
|
|
{
|
|
// Make sure callers of this use
|
|
// WillInitializeContext/DidInitializeContext around this call.
|
|
NS_ENSURE_TRUE(!mIsInitialized, NS_ERROR_ALREADY_INITIALIZED);
|
|
|
|
if (!mContext)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
::JS_SetErrorReporter(mContext, NS_ScriptErrorReporter);
|
|
|
|
JSOptionChangedCallback(js_options_dot_str, this);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsJSContext::InitializeExternalClasses()
|
|
{
|
|
nsScriptNameSpaceManager *nameSpaceManager = nsJSRuntime::GetNameSpaceManager();
|
|
NS_ENSURE_TRUE(nameSpaceManager, NS_ERROR_NOT_INITIALIZED);
|
|
|
|
return nameSpaceManager->InitForContext(this);
|
|
}
|
|
|
|
nsresult
|
|
nsJSContext::SetProperty(JSObject* aTarget, const char* aPropName, nsISupports* aArgs)
|
|
{
|
|
uint32_t argc;
|
|
JS::Value *argv = nullptr;
|
|
|
|
nsCxPusher pusher;
|
|
pusher.Push(mContext);
|
|
XPCAutoRequest ar(mContext);
|
|
|
|
Maybe<nsRootedJSValueArray> tempStorage;
|
|
|
|
nsresult rv =
|
|
ConvertSupportsTojsvals(aArgs, GetNativeGlobal(), &argc, &argv, tempStorage);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
JS::Value vargs;
|
|
|
|
// got the arguments, now attach them.
|
|
|
|
// window.dialogArguments is supposed to be an array if a JS array
|
|
// was passed to showModalDialog(), deal with that here.
|
|
if (strcmp(aPropName, "dialogArguments") == 0 && argc <= 1) {
|
|
vargs = argc ? argv[0] : JSVAL_VOID;
|
|
} else {
|
|
for (uint32_t i = 0; i < argc; ++i) {
|
|
if (!JS_WrapValue(mContext, &argv[i])) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
JSObject *args = ::JS_NewArrayObject(mContext, argc, argv);
|
|
vargs = OBJECT_TO_JSVAL(args);
|
|
}
|
|
|
|
// Make sure to use JS_DefineProperty here so that we can override
|
|
// readonly XPConnect properties here as well (read dialogArguments).
|
|
return JS_DefineProperty(mContext, aTarget, aPropName, vargs, NULL, NULL, 0)
|
|
? NS_OK
|
|
: NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsresult
|
|
nsJSContext::ConvertSupportsTojsvals(nsISupports *aArgs,
|
|
JSObject *aScope,
|
|
uint32_t *aArgc,
|
|
JS::Value **aArgv,
|
|
Maybe<nsRootedJSValueArray> &aTempStorage)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
// If the array implements nsIJSArgArray, just grab the values directly.
|
|
nsCOMPtr<nsIJSArgArray> fastArray = do_QueryInterface(aArgs);
|
|
if (fastArray != nullptr)
|
|
return fastArray->GetArgs(aArgc, reinterpret_cast<void **>(aArgv));
|
|
|
|
// Take the slower path converting each item.
|
|
// Handle only nsIArray and nsIVariant. nsIArray is only needed for
|
|
// SetProperty('arguments', ...);
|
|
|
|
*aArgv = nullptr;
|
|
*aArgc = 0;
|
|
|
|
nsIXPConnect *xpc = nsContentUtils::XPConnect();
|
|
NS_ENSURE_TRUE(xpc, NS_ERROR_UNEXPECTED);
|
|
|
|
if (!aArgs)
|
|
return NS_OK;
|
|
uint32_t argCount;
|
|
// This general purpose function may need to convert an arg array
|
|
// (window.arguments, event-handler args) and a generic property.
|
|
nsCOMPtr<nsIArray> argsArray(do_QueryInterface(aArgs));
|
|
|
|
if (argsArray) {
|
|
rv = argsArray->GetLength(&argCount);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (argCount == 0)
|
|
return NS_OK;
|
|
} else {
|
|
argCount = 1; // the nsISupports which is not an array
|
|
}
|
|
|
|
// Use the caller's auto guards to release and unroot.
|
|
aTempStorage.construct(mContext);
|
|
aTempStorage.ref().SetCapacity(mContext, argCount);
|
|
JS::Value *argv = aTempStorage.ref().Elements();
|
|
|
|
if (argsArray) {
|
|
for (uint32_t argCtr = 0; argCtr < argCount && NS_SUCCEEDED(rv); argCtr++) {
|
|
nsCOMPtr<nsISupports> arg;
|
|
JS::Value *thisval = argv + argCtr;
|
|
argsArray->QueryElementAt(argCtr, NS_GET_IID(nsISupports),
|
|
getter_AddRefs(arg));
|
|
if (!arg) {
|
|
*thisval = JSVAL_NULL;
|
|
continue;
|
|
}
|
|
nsCOMPtr<nsIVariant> variant(do_QueryInterface(arg));
|
|
if (variant != nullptr) {
|
|
rv = xpc->VariantToJS(mContext, aScope, variant, thisval);
|
|
} else {
|
|
// And finally, support the nsISupportsPrimitives supplied
|
|
// by the AppShell. It generally will pass only strings, but
|
|
// as we have code for handling all, we may as well use it.
|
|
rv = AddSupportsPrimitiveTojsvals(arg, thisval);
|
|
if (rv == NS_ERROR_NO_INTERFACE) {
|
|
// something else - probably an event object or similar -
|
|
// just wrap it.
|
|
#ifdef DEBUG
|
|
// but first, check its not another nsISupportsPrimitive, as
|
|
// these are now deprecated for use with script contexts.
|
|
nsCOMPtr<nsISupportsPrimitive> prim(do_QueryInterface(arg));
|
|
NS_ASSERTION(prim == nullptr,
|
|
"Don't pass nsISupportsPrimitives - use nsIVariant!");
|
|
#endif
|
|
nsCOMPtr<nsIXPConnectJSObjectHolder> wrapper;
|
|
JS::Value v;
|
|
rv = nsContentUtils::WrapNative(mContext, aScope, arg, &v,
|
|
getter_AddRefs(wrapper));
|
|
if (NS_SUCCEEDED(rv)) {
|
|
*thisval = v;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
nsCOMPtr<nsIVariant> variant = do_QueryInterface(aArgs);
|
|
if (variant) {
|
|
rv = xpc->VariantToJS(mContext, aScope, variant, argv);
|
|
} else {
|
|
NS_ERROR("Not an array, not an interface?");
|
|
rv = NS_ERROR_UNEXPECTED;
|
|
}
|
|
}
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
*aArgv = argv;
|
|
*aArgc = argCount;
|
|
return NS_OK;
|
|
}
|
|
|
|
// This really should go into xpconnect somewhere...
|
|
nsresult
|
|
nsJSContext::AddSupportsPrimitiveTojsvals(nsISupports *aArg, JS::Value *aArgv)
|
|
{
|
|
NS_PRECONDITION(aArg, "Empty arg");
|
|
|
|
nsCOMPtr<nsISupportsPrimitive> argPrimitive(do_QueryInterface(aArg));
|
|
if (!argPrimitive)
|
|
return NS_ERROR_NO_INTERFACE;
|
|
|
|
JSContext *cx = mContext;
|
|
uint16_t type;
|
|
argPrimitive->GetType(&type);
|
|
|
|
switch(type) {
|
|
case nsISupportsPrimitive::TYPE_CSTRING : {
|
|
nsCOMPtr<nsISupportsCString> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
nsAutoCString data;
|
|
|
|
p->GetData(data);
|
|
|
|
|
|
JSString *str = ::JS_NewStringCopyN(cx, data.get(), data.Length());
|
|
NS_ENSURE_TRUE(str, NS_ERROR_OUT_OF_MEMORY);
|
|
|
|
*aArgv = STRING_TO_JSVAL(str);
|
|
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_STRING : {
|
|
nsCOMPtr<nsISupportsString> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
nsAutoString data;
|
|
|
|
p->GetData(data);
|
|
|
|
// cast is probably safe since wchar_t and jschar are expected
|
|
// to be equivalent; both unsigned 16-bit entities
|
|
JSString *str =
|
|
::JS_NewUCStringCopyN(cx,
|
|
reinterpret_cast<const jschar *>(data.get()),
|
|
data.Length());
|
|
NS_ENSURE_TRUE(str, NS_ERROR_OUT_OF_MEMORY);
|
|
|
|
*aArgv = STRING_TO_JSVAL(str);
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_PRBOOL : {
|
|
nsCOMPtr<nsISupportsPRBool> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
bool data;
|
|
|
|
p->GetData(&data);
|
|
|
|
*aArgv = BOOLEAN_TO_JSVAL(data);
|
|
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_PRUINT8 : {
|
|
nsCOMPtr<nsISupportsPRUint8> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
uint8_t data;
|
|
|
|
p->GetData(&data);
|
|
|
|
*aArgv = INT_TO_JSVAL(data);
|
|
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_PRUINT16 : {
|
|
nsCOMPtr<nsISupportsPRUint16> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
uint16_t data;
|
|
|
|
p->GetData(&data);
|
|
|
|
*aArgv = INT_TO_JSVAL(data);
|
|
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_PRUINT32 : {
|
|
nsCOMPtr<nsISupportsPRUint32> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
uint32_t data;
|
|
|
|
p->GetData(&data);
|
|
|
|
*aArgv = INT_TO_JSVAL(data);
|
|
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_CHAR : {
|
|
nsCOMPtr<nsISupportsChar> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
char data;
|
|
|
|
p->GetData(&data);
|
|
|
|
JSString *str = ::JS_NewStringCopyN(cx, &data, 1);
|
|
NS_ENSURE_TRUE(str, NS_ERROR_OUT_OF_MEMORY);
|
|
|
|
*aArgv = STRING_TO_JSVAL(str);
|
|
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_PRINT16 : {
|
|
nsCOMPtr<nsISupportsPRInt16> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
int16_t data;
|
|
|
|
p->GetData(&data);
|
|
|
|
*aArgv = INT_TO_JSVAL(data);
|
|
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_PRINT32 : {
|
|
nsCOMPtr<nsISupportsPRInt32> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
int32_t data;
|
|
|
|
p->GetData(&data);
|
|
|
|
*aArgv = INT_TO_JSVAL(data);
|
|
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_FLOAT : {
|
|
nsCOMPtr<nsISupportsFloat> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
float data;
|
|
|
|
p->GetData(&data);
|
|
|
|
*aArgv = ::JS_NumberValue(data);
|
|
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_DOUBLE : {
|
|
nsCOMPtr<nsISupportsDouble> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
double data;
|
|
|
|
p->GetData(&data);
|
|
|
|
*aArgv = ::JS_NumberValue(data);
|
|
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_INTERFACE_POINTER : {
|
|
nsCOMPtr<nsISupportsInterfacePointer> p(do_QueryInterface(argPrimitive));
|
|
NS_ENSURE_TRUE(p, NS_ERROR_UNEXPECTED);
|
|
|
|
nsCOMPtr<nsISupports> data;
|
|
nsIID *iid = nullptr;
|
|
|
|
p->GetData(getter_AddRefs(data));
|
|
p->GetDataIID(&iid);
|
|
NS_ENSURE_TRUE(iid, NS_ERROR_UNEXPECTED);
|
|
|
|
AutoFree iidGuard(iid); // Free iid upon destruction.
|
|
|
|
nsCOMPtr<nsIXPConnectJSObjectHolder> wrapper;
|
|
JSObject *global = xpc_UnmarkGrayObject(::JS_GetGlobalObject(cx));
|
|
JS::Value v;
|
|
nsresult rv = nsContentUtils::WrapNative(cx, global,
|
|
data, iid, &v,
|
|
getter_AddRefs(wrapper));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
*aArgv = v;
|
|
|
|
break;
|
|
}
|
|
case nsISupportsPrimitive::TYPE_ID :
|
|
case nsISupportsPrimitive::TYPE_PRUINT64 :
|
|
case nsISupportsPrimitive::TYPE_PRINT64 :
|
|
case nsISupportsPrimitive::TYPE_PRTIME :
|
|
case nsISupportsPrimitive::TYPE_VOID : {
|
|
NS_WARNING("Unsupported primitive type used");
|
|
*aArgv = JSVAL_NULL;
|
|
break;
|
|
}
|
|
default : {
|
|
NS_WARNING("Unknown primitive type used");
|
|
*aArgv = JSVAL_NULL;
|
|
break;
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
#ifdef NS_TRACE_MALLOC
|
|
|
|
#include <errno.h> // XXX assume Linux if NS_TRACE_MALLOC
|
|
#include <fcntl.h>
|
|
#ifdef XP_UNIX
|
|
#include <unistd.h>
|
|
#endif
|
|
#ifdef XP_WIN32
|
|
#include <io.h>
|
|
#endif
|
|
#include "nsTraceMalloc.h"
|
|
|
|
static JSBool
|
|
CheckUniversalXPConnectForTraceMalloc(JSContext *cx)
|
|
{
|
|
if (nsContentUtils::IsCallerChrome())
|
|
return JS_TRUE;
|
|
JS_ReportError(cx, "trace-malloc functions require UniversalXPConnect");
|
|
return JS_FALSE;
|
|
}
|
|
|
|
static JSBool
|
|
TraceMallocDisable(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
if (!CheckUniversalXPConnectForTraceMalloc(cx))
|
|
return JS_FALSE;
|
|
|
|
NS_TraceMallocDisable();
|
|
JS_SET_RVAL(cx, vp, JSVAL_VOID);
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
TraceMallocEnable(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
if (!CheckUniversalXPConnectForTraceMalloc(cx))
|
|
return JS_FALSE;
|
|
|
|
NS_TraceMallocEnable();
|
|
JS_SET_RVAL(cx, vp, JSVAL_VOID);
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
TraceMallocOpenLogFile(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
int fd;
|
|
JSString *str;
|
|
|
|
if (!CheckUniversalXPConnectForTraceMalloc(cx))
|
|
return JS_FALSE;
|
|
|
|
if (argc == 0) {
|
|
fd = -1;
|
|
} else {
|
|
str = JS_ValueToString(cx, JS_ARGV(cx, vp)[0]);
|
|
if (!str)
|
|
return JS_FALSE;
|
|
JSAutoByteString filename(cx, str);
|
|
if (!filename)
|
|
return JS_FALSE;
|
|
fd = open(filename.ptr(), O_CREAT | O_WRONLY | O_TRUNC, 0644);
|
|
if (fd < 0) {
|
|
JS_ReportError(cx, "can't open %s: %s", filename.ptr(), strerror(errno));
|
|
return JS_FALSE;
|
|
}
|
|
}
|
|
JS_SET_RVAL(cx, vp, INT_TO_JSVAL(fd));
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
TraceMallocChangeLogFD(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
if (!CheckUniversalXPConnectForTraceMalloc(cx))
|
|
return JS_FALSE;
|
|
|
|
int32_t fd, oldfd;
|
|
if (argc == 0) {
|
|
oldfd = -1;
|
|
} else {
|
|
if (!JS_ValueToECMAInt32(cx, JS_ARGV(cx, vp)[0], &fd))
|
|
return JS_FALSE;
|
|
oldfd = NS_TraceMallocChangeLogFD(fd);
|
|
if (oldfd == -2) {
|
|
JS_ReportOutOfMemory(cx);
|
|
return JS_FALSE;
|
|
}
|
|
}
|
|
JS_SET_RVAL(cx, vp, INT_TO_JSVAL(oldfd));
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
TraceMallocCloseLogFD(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
if (!CheckUniversalXPConnectForTraceMalloc(cx))
|
|
return JS_FALSE;
|
|
|
|
int32_t fd;
|
|
JS_SET_RVAL(cx, vp, JSVAL_VOID);
|
|
if (argc == 0)
|
|
return JS_TRUE;
|
|
if (!JS_ValueToECMAInt32(cx, JS_ARGV(cx, vp)[0], &fd))
|
|
return JS_FALSE;
|
|
NS_TraceMallocCloseLogFD((int) fd);
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
TraceMallocLogTimestamp(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
if (!CheckUniversalXPConnectForTraceMalloc(cx))
|
|
return JS_FALSE;
|
|
|
|
JSString *str = JS_ValueToString(cx, argc ? JS_ARGV(cx, vp)[0] : JSVAL_VOID);
|
|
if (!str)
|
|
return JS_FALSE;
|
|
JSAutoByteString caption(cx, str);
|
|
if (!caption)
|
|
return JS_FALSE;
|
|
NS_TraceMallocLogTimestamp(caption.ptr());
|
|
JS_SET_RVAL(cx, vp, JSVAL_VOID);
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static JSBool
|
|
TraceMallocDumpAllocations(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
if (!CheckUniversalXPConnectForTraceMalloc(cx))
|
|
return JS_FALSE;
|
|
|
|
JSString *str = JS_ValueToString(cx, argc ? JS_ARGV(cx, vp)[0] : JSVAL_VOID);
|
|
if (!str)
|
|
return JS_FALSE;
|
|
JSAutoByteString pathname(cx, str);
|
|
if (!pathname)
|
|
return JS_FALSE;
|
|
if (NS_TraceMallocDumpAllocations(pathname.ptr()) < 0) {
|
|
JS_ReportError(cx, "can't dump to %s: %s", pathname.ptr(), strerror(errno));
|
|
return JS_FALSE;
|
|
}
|
|
JS_SET_RVAL(cx, vp, JSVAL_VOID);
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static const JSFunctionSpec TraceMallocFunctions[] = {
|
|
JS_FS("TraceMallocDisable", TraceMallocDisable, 0, 0),
|
|
JS_FS("TraceMallocEnable", TraceMallocEnable, 0, 0),
|
|
JS_FS("TraceMallocOpenLogFile", TraceMallocOpenLogFile, 1, 0),
|
|
JS_FS("TraceMallocChangeLogFD", TraceMallocChangeLogFD, 1, 0),
|
|
JS_FS("TraceMallocCloseLogFD", TraceMallocCloseLogFD, 1, 0),
|
|
JS_FS("TraceMallocLogTimestamp", TraceMallocLogTimestamp, 1, 0),
|
|
JS_FS("TraceMallocDumpAllocations", TraceMallocDumpAllocations, 1, 0),
|
|
JS_FS_END
|
|
};
|
|
|
|
#endif /* NS_TRACE_MALLOC */
|
|
|
|
#ifdef MOZ_DMD
|
|
|
|
#include <errno.h>
|
|
|
|
namespace mozilla {
|
|
namespace dmd {
|
|
|
|
// See https://wiki.mozilla.org/Performance/MemShrink/DMD for instructions on
|
|
// how to use DMD.
|
|
|
|
static JSBool
|
|
ReportAndDump(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
JSString *str = JS_ValueToString(cx, argc ? JS_ARGV(cx, vp)[0] : JSVAL_VOID);
|
|
if (!str)
|
|
return JS_FALSE;
|
|
JSAutoByteString pathname(cx, str);
|
|
if (!pathname)
|
|
return JS_FALSE;
|
|
|
|
FILE* fp = fopen(pathname.ptr(), "w");
|
|
if (!fp) {
|
|
JS_ReportError(cx, "DMD can't open %s: %s",
|
|
pathname.ptr(), strerror(errno));
|
|
return JS_FALSE;
|
|
}
|
|
|
|
dmd::ClearReports();
|
|
fprintf(stderr, "DMD: running reporters...\n");
|
|
dmd::RunReporters();
|
|
dmd::Writer writer(FpWrite, fp);
|
|
dmd::Dump(writer);
|
|
|
|
fclose(fp);
|
|
|
|
JS_SET_RVAL(cx, vp, JSVAL_VOID);
|
|
return JS_TRUE;
|
|
}
|
|
|
|
} // namespace dmd
|
|
} // namespace mozilla
|
|
|
|
static const JSFunctionSpec DMDFunctions[] = {
|
|
JS_FS("DMDReportAndDump", dmd::ReportAndDump, 1, 0),
|
|
JS_FS_END
|
|
};
|
|
|
|
#endif // defined(MOZ_DMD)
|
|
|
|
#ifdef MOZ_JPROF
|
|
|
|
#include <signal.h>
|
|
|
|
inline bool
|
|
IsJProfAction(struct sigaction *action)
|
|
{
|
|
return (action->sa_sigaction &&
|
|
(action->sa_flags & (SA_RESTART | SA_SIGINFO)) == (SA_RESTART | SA_SIGINFO));
|
|
}
|
|
|
|
void NS_JProfStartProfiling();
|
|
void NS_JProfStopProfiling();
|
|
void NS_JProfClearCircular();
|
|
|
|
static JSBool
|
|
JProfStartProfilingJS(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
NS_JProfStartProfiling();
|
|
return JS_TRUE;
|
|
}
|
|
|
|
void NS_JProfStartProfiling()
|
|
{
|
|
// Figure out whether we're dealing with SIGPROF, SIGALRM, or
|
|
// SIGPOLL profiling (SIGALRM for JP_REALTIME, SIGPOLL for
|
|
// JP_RTC_HZ)
|
|
struct sigaction action;
|
|
|
|
// Must check ALRM before PROF since both are enabled for real-time
|
|
sigaction(SIGALRM, nullptr, &action);
|
|
//printf("SIGALRM: %p, flags = %x\n",action.sa_sigaction,action.sa_flags);
|
|
if (IsJProfAction(&action)) {
|
|
//printf("Beginning real-time jprof profiling.\n");
|
|
raise(SIGALRM);
|
|
return;
|
|
}
|
|
|
|
sigaction(SIGPROF, nullptr, &action);
|
|
//printf("SIGPROF: %p, flags = %x\n",action.sa_sigaction,action.sa_flags);
|
|
if (IsJProfAction(&action)) {
|
|
//printf("Beginning process-time jprof profiling.\n");
|
|
raise(SIGPROF);
|
|
return;
|
|
}
|
|
|
|
sigaction(SIGPOLL, nullptr, &action);
|
|
//printf("SIGPOLL: %p, flags = %x\n",action.sa_sigaction,action.sa_flags);
|
|
if (IsJProfAction(&action)) {
|
|
//printf("Beginning rtc-based jprof profiling.\n");
|
|
raise(SIGPOLL);
|
|
return;
|
|
}
|
|
|
|
printf("Could not start jprof-profiling since JPROF_FLAGS was not set.\n");
|
|
}
|
|
|
|
static JSBool
|
|
JProfStopProfilingJS(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
NS_JProfStopProfiling();
|
|
return JS_TRUE;
|
|
}
|
|
|
|
void
|
|
NS_JProfStopProfiling()
|
|
{
|
|
raise(SIGUSR1);
|
|
//printf("Stopped jprof profiling.\n");
|
|
}
|
|
|
|
static JSBool
|
|
JProfClearCircularJS(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
NS_JProfClearCircular();
|
|
return JS_TRUE;
|
|
}
|
|
|
|
void
|
|
NS_JProfClearCircular()
|
|
{
|
|
raise(SIGUSR2);
|
|
//printf("cleared jprof buffer\n");
|
|
}
|
|
|
|
static JSBool
|
|
JProfSaveCircularJS(JSContext *cx, unsigned argc, JS::Value *vp)
|
|
{
|
|
// Not ideal...
|
|
NS_JProfStopProfiling();
|
|
NS_JProfStartProfiling();
|
|
return JS_TRUE;
|
|
}
|
|
|
|
static const JSFunctionSpec JProfFunctions[] = {
|
|
JS_FS("JProfStartProfiling", JProfStartProfilingJS, 0, 0),
|
|
JS_FS("JProfStopProfiling", JProfStopProfilingJS, 0, 0),
|
|
JS_FS("JProfClearCircular", JProfClearCircularJS, 0, 0),
|
|
JS_FS("JProfSaveCircular", JProfSaveCircularJS, 0, 0),
|
|
JS_FS_END
|
|
};
|
|
|
|
#endif /* defined(MOZ_JPROF) */
|
|
|
|
nsresult
|
|
nsJSContext::InitClasses(JSObject* aGlobalObj)
|
|
{
|
|
nsresult rv = InitializeExternalClasses();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
JSAutoRequest ar(mContext);
|
|
|
|
JSOptionChangedCallback(js_options_dot_str, this);
|
|
|
|
// Attempt to initialize profiling functions
|
|
::JS_DefineProfilingFunctions(mContext, aGlobalObj);
|
|
|
|
#ifdef NS_TRACE_MALLOC
|
|
// Attempt to initialize TraceMalloc functions
|
|
::JS_DefineFunctions(mContext, aGlobalObj, TraceMallocFunctions);
|
|
#endif
|
|
|
|
#ifdef MOZ_DMD
|
|
// Attempt to initialize DMD functions
|
|
::JS_DefineFunctions(mContext, aGlobalObj, DMDFunctions);
|
|
#endif
|
|
|
|
#ifdef MOZ_JPROF
|
|
// Attempt to initialize JProf functions
|
|
::JS_DefineFunctions(mContext, aGlobalObj, JProfFunctions);
|
|
#endif
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsJSContext::WillInitializeContext()
|
|
{
|
|
mIsInitialized = false;
|
|
}
|
|
|
|
void
|
|
nsJSContext::DidInitializeContext()
|
|
{
|
|
mIsInitialized = true;
|
|
}
|
|
|
|
bool
|
|
nsJSContext::IsContextInitialized()
|
|
{
|
|
return mIsInitialized;
|
|
}
|
|
|
|
void
|
|
nsJSContext::ScriptEvaluated(bool aTerminated)
|
|
{
|
|
if (aTerminated && mTerminations) {
|
|
// Make sure to null out mTerminations before doing anything that
|
|
// might cause new termination funcs to be added!
|
|
nsJSContext::TerminationFuncClosure* start = mTerminations;
|
|
mTerminations = nullptr;
|
|
|
|
for (nsJSContext::TerminationFuncClosure* cur = start;
|
|
cur;
|
|
cur = cur->mNext) {
|
|
(*(cur->mTerminationFunc))(cur->mTerminationFuncArg);
|
|
}
|
|
delete start;
|
|
}
|
|
|
|
JS_MaybeGC(mContext);
|
|
|
|
if (aTerminated) {
|
|
mOperationCallbackTime = 0;
|
|
mModalStateTime = 0;
|
|
mActive = true;
|
|
}
|
|
}
|
|
|
|
void
|
|
nsJSContext::SetTerminationFunction(nsScriptTerminationFunc aFunc,
|
|
nsIDOMWindow* aRef)
|
|
{
|
|
NS_PRECONDITION(GetExecutingScript(), "should be executing script");
|
|
|
|
nsJSContext::TerminationFuncClosure* newClosure =
|
|
new nsJSContext::TerminationFuncClosure(aFunc, aRef, mTerminations);
|
|
mTerminations = newClosure;
|
|
}
|
|
|
|
bool
|
|
nsJSContext::GetScriptsEnabled()
|
|
{
|
|
return mScriptsEnabled;
|
|
}
|
|
|
|
void
|
|
nsJSContext::SetScriptsEnabled(bool aEnabled, bool aFireTimeouts)
|
|
{
|
|
// eeek - this seems the wrong way around - the global should callback
|
|
// into each context, so every language is disabled.
|
|
mScriptsEnabled = aEnabled;
|
|
|
|
nsIScriptGlobalObject *global = GetGlobalObject();
|
|
|
|
if (global) {
|
|
global->SetScriptsEnabled(aEnabled, aFireTimeouts);
|
|
}
|
|
}
|
|
|
|
|
|
bool
|
|
nsJSContext::GetProcessingScriptTag()
|
|
{
|
|
return mProcessingScriptTag;
|
|
}
|
|
|
|
void
|
|
nsJSContext::SetProcessingScriptTag(bool aFlag)
|
|
{
|
|
mProcessingScriptTag = aFlag;
|
|
}
|
|
|
|
bool
|
|
nsJSContext::GetExecutingScript()
|
|
{
|
|
return JS_IsRunning(mContext) || mExecuteDepth > 0;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsJSContext::ScriptExecuted()
|
|
{
|
|
ScriptEvaluated(!::JS_IsRunning(mContext));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
FullGCTimerFired(nsITimer* aTimer, void* aClosure)
|
|
{
|
|
NS_RELEASE(sFullGCTimer);
|
|
|
|
uintptr_t reason = reinterpret_cast<uintptr_t>(aClosure);
|
|
nsJSContext::GarbageCollectNow(static_cast<JS::gcreason::Reason>(reason),
|
|
nsJSContext::IncrementalGC);
|
|
}
|
|
|
|
//static
|
|
void
|
|
nsJSContext::GarbageCollectNow(JS::gcreason::Reason aReason,
|
|
IsIncremental aIncremental,
|
|
IsCompartment aCompartment,
|
|
IsShrinking aShrinking,
|
|
int64_t aSliceMillis)
|
|
{
|
|
PROFILER_LABEL("GC", "GarbageCollectNow");
|
|
|
|
MOZ_ASSERT_IF(aSliceMillis, aIncremental == IncrementalGC);
|
|
|
|
KillGCTimer();
|
|
KillShrinkGCBuffersTimer();
|
|
|
|
// Reset sPendingLoadCount in case the timer that fired was a
|
|
// timer we scheduled due to a normal GC timer firing while
|
|
// documents were loading. If this happens we're waiting for a
|
|
// document that is taking a long time to load, and we effectively
|
|
// ignore the fact that the currently loading documents are still
|
|
// loading and move on as if they weren't.
|
|
sPendingLoadCount = 0;
|
|
sLoadingInProgress = false;
|
|
|
|
if (!nsContentUtils::XPConnect() || !nsJSRuntime::sRuntime) {
|
|
return;
|
|
}
|
|
|
|
if (sCCLockedOut && aIncremental == IncrementalGC) {
|
|
// We're in the middle of incremental GC. Do another slice.
|
|
JS::PrepareForIncrementalGC(nsJSRuntime::sRuntime);
|
|
JS::IncrementalGC(nsJSRuntime::sRuntime, aReason, aSliceMillis);
|
|
return;
|
|
}
|
|
|
|
// Use zone GC when we're not asked to do a shrinking GC nor
|
|
// global GC and compartment GC has been called less than
|
|
// NS_MAX_COMPARTMENT_GC_COUNT times after the previous global GC.
|
|
if (!sDisableExplicitCompartmentGC &&
|
|
aShrinking != ShrinkingGC && aCompartment != NonCompartmentGC &&
|
|
sCompartmentGCCount < NS_MAX_COMPARTMENT_GC_COUNT) {
|
|
JS::PrepareForFullGC(nsJSRuntime::sRuntime);
|
|
for (nsJSContext* cx = sContextList; cx; cx = cx->mNext) {
|
|
if (!cx->mActive && cx->mContext) {
|
|
if (JSObject* global = cx->GetNativeGlobal()) {
|
|
JS::SkipZoneForGC(JS::GetObjectZone(global));
|
|
}
|
|
}
|
|
cx->mActive = false;
|
|
}
|
|
if (JS::IsGCScheduled(nsJSRuntime::sRuntime)) {
|
|
if (aIncremental == IncrementalGC) {
|
|
JS::IncrementalGC(nsJSRuntime::sRuntime, aReason, aSliceMillis);
|
|
} else {
|
|
JS::GCForReason(nsJSRuntime::sRuntime, aReason);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
for (nsJSContext* cx = sContextList; cx; cx = cx->mNext) {
|
|
cx->mActive = false;
|
|
}
|
|
JS::PrepareForFullGC(nsJSRuntime::sRuntime);
|
|
if (aIncremental == IncrementalGC) {
|
|
JS::IncrementalGC(nsJSRuntime::sRuntime, aReason, aSliceMillis);
|
|
} else {
|
|
JS::GCForReason(nsJSRuntime::sRuntime, aReason);
|
|
}
|
|
}
|
|
|
|
//static
|
|
void
|
|
nsJSContext::ShrinkGCBuffersNow()
|
|
{
|
|
PROFILER_LABEL("GC", "ShrinkGCBuffersNow");
|
|
|
|
KillShrinkGCBuffersTimer();
|
|
|
|
JS::ShrinkGCBuffers(nsJSRuntime::sRuntime);
|
|
}
|
|
|
|
// Return true if any JSContext has a "global object" with a gray
|
|
// parent. The intent is to look for JS Object windows. We don't merge
|
|
// system compartments, so we don't use them to trigger merging CCs.
|
|
static bool
|
|
AnyGrayGlobalParent()
|
|
{
|
|
if (!nsJSRuntime::sRuntime) {
|
|
return false;
|
|
}
|
|
JSContext *iter = nullptr;
|
|
JSContext *cx;
|
|
while ((cx = JS_ContextIterator(nsJSRuntime::sRuntime, &iter))) {
|
|
if (JSObject *global = JS_GetGlobalObject(cx)) {
|
|
if (JSObject *parent = js::GetObjectParent(global)) {
|
|
if (JS::GCThingIsMarkedGray(parent) &&
|
|
!js::IsSystemCompartment(js::GetObjectCompartment(parent))) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
DoMergingCC(bool aForced)
|
|
{
|
|
// Don't merge too many times in a row, and do at least a minimum
|
|
// number of unmerged CCs in a row.
|
|
static const int32_t kMinConsecutiveUnmerged = 3;
|
|
static const int32_t kMaxConsecutiveMerged = 3;
|
|
|
|
static int32_t sUnmergedNeeded = 0;
|
|
static int32_t sMergedInARow = 0;
|
|
|
|
MOZ_ASSERT(0 <= sUnmergedNeeded && sUnmergedNeeded <= kMinConsecutiveUnmerged);
|
|
MOZ_ASSERT(0 <= sMergedInARow && sMergedInARow <= kMaxConsecutiveMerged);
|
|
|
|
if (sMergedInARow == kMaxConsecutiveMerged) {
|
|
MOZ_ASSERT(sUnmergedNeeded == 0);
|
|
sUnmergedNeeded = kMinConsecutiveUnmerged;
|
|
}
|
|
|
|
if (sUnmergedNeeded > 0) {
|
|
sUnmergedNeeded--;
|
|
sMergedInARow = 0;
|
|
return false;
|
|
}
|
|
|
|
if (!aForced && AnyGrayGlobalParent()) {
|
|
sMergedInARow++;
|
|
return true;
|
|
} else {
|
|
sMergedInARow = 0;
|
|
return false;
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
FinishAnyIncrementalGC()
|
|
{
|
|
if (sCCLockedOut) {
|
|
// We're in the middle of an incremental GC, so finish it.
|
|
JS::PrepareForIncrementalGC(nsJSRuntime::sRuntime);
|
|
JS::FinishIncrementalGC(nsJSRuntime::sRuntime, JS::gcreason::CC_FORCED);
|
|
}
|
|
}
|
|
|
|
static void
|
|
FireForgetSkippable(uint32_t aSuspected, bool aRemoveChildless)
|
|
{
|
|
PRTime startTime = PR_Now();
|
|
FinishAnyIncrementalGC();
|
|
nsCycleCollector_forgetSkippable(aRemoveChildless);
|
|
sPreviousSuspectedCount = nsCycleCollector_suspectedCount();
|
|
++sCleanupsSinceLastGC;
|
|
PRTime delta = PR_Now() - startTime;
|
|
if (sMinForgetSkippableTime > delta) {
|
|
sMinForgetSkippableTime = delta;
|
|
}
|
|
if (sMaxForgetSkippableTime < delta) {
|
|
sMaxForgetSkippableTime = delta;
|
|
}
|
|
sTotalForgetSkippableTime += delta;
|
|
sRemovedPurples += (aSuspected - sPreviousSuspectedCount);
|
|
++sForgetSkippableBeforeCC;
|
|
}
|
|
|
|
MOZ_ALWAYS_INLINE
|
|
static uint32_t
|
|
TimeBetween(PRTime start, PRTime end)
|
|
{
|
|
MOZ_ASSERT(end >= start);
|
|
return (uint32_t)(end - start) / PR_USEC_PER_MSEC;
|
|
}
|
|
|
|
//static
|
|
void
|
|
nsJSContext::CycleCollectNow(nsICycleCollectorListener *aListener,
|
|
int32_t aExtraForgetSkippableCalls,
|
|
bool aForced)
|
|
{
|
|
if (!NS_IsMainThread()) {
|
|
return;
|
|
}
|
|
|
|
PROFILER_LABEL("CC", "CycleCollectNow");
|
|
|
|
PRTime start = PR_Now();
|
|
|
|
// Before we begin the cycle collection, make sure there is no active GC.
|
|
bool finishedIGC = sCCLockedOut;
|
|
FinishAnyIncrementalGC();
|
|
PRTime endGCTime = PR_Now();
|
|
uint32_t gcDuration = TimeBetween(start, endGCTime);
|
|
|
|
KillCCTimer();
|
|
|
|
uint32_t suspected = nsCycleCollector_suspectedCount();
|
|
bool ranSyncForgetSkippable = false;
|
|
|
|
// Run forgetSkippable synchronously to reduce the size of the CC graph. This
|
|
// is particularly useful if we recently finished a GC.
|
|
if (sCleanupsSinceLastGC < 2 && aExtraForgetSkippableCalls >= 0) {
|
|
while (sCleanupsSinceLastGC < 2) {
|
|
FireForgetSkippable(nsCycleCollector_suspectedCount(), false);
|
|
ranSyncForgetSkippable = true;
|
|
}
|
|
}
|
|
|
|
for (int32_t i = 0; i < aExtraForgetSkippableCalls; ++i) {
|
|
FireForgetSkippable(nsCycleCollector_suspectedCount(), false);
|
|
ranSyncForgetSkippable = true;
|
|
}
|
|
|
|
PRTime endSkippableTime = PR_Now();
|
|
uint32_t skippableDuration = TimeBetween(endGCTime, endSkippableTime);
|
|
|
|
// Prepare to actually run the CC.
|
|
bool mergingCC = DoMergingCC(aForced);
|
|
nsCycleCollectorResults ccResults;
|
|
nsCycleCollector_collect(mergingCC, &ccResults, aListener);
|
|
sCCollectedWaitingForGC += ccResults.mFreedRefCounted + ccResults.mFreedGCed;
|
|
|
|
// If we collected a substantial amount of cycles, poke the GC since more objects
|
|
// might be unreachable now.
|
|
if (sCCollectedWaitingForGC > 250 ||
|
|
sLikelyShortLivingObjectsNeedingGC > 2500) {
|
|
PokeGC(JS::gcreason::CC_WAITING);
|
|
}
|
|
|
|
PRTime endCCTime = PR_Now();
|
|
|
|
// Log information about the CC via telemetry, JSON and the console.
|
|
uint32_t ccNowDuration = TimeBetween(start, endCCTime);
|
|
Telemetry::Accumulate(Telemetry::CYCLE_COLLECTOR_FINISH_IGC, finishedIGC);
|
|
Telemetry::Accumulate(Telemetry::CYCLE_COLLECTOR_SYNC_SKIPPABLE, ranSyncForgetSkippable);
|
|
Telemetry::Accumulate(Telemetry::CYCLE_COLLECTOR_FULL, ccNowDuration);
|
|
|
|
if (sLastCCEndTime) {
|
|
uint32_t timeBetween = (uint32_t)(start - sLastCCEndTime) / PR_USEC_PER_SEC;
|
|
Telemetry::Accumulate(Telemetry::CYCLE_COLLECTOR_TIME_BETWEEN, timeBetween);
|
|
}
|
|
sLastCCEndTime = endCCTime;
|
|
|
|
Telemetry::Accumulate(Telemetry::FORGET_SKIPPABLE_MAX,
|
|
sMaxForgetSkippableTime / PR_USEC_PER_MSEC);
|
|
|
|
PRTime delta = GetCollectionTimeDelta();
|
|
|
|
uint32_t cleanups = sForgetSkippableBeforeCC ? sForgetSkippableBeforeCC : 1;
|
|
uint32_t minForgetSkippableTime = (sMinForgetSkippableTime == UINT32_MAX)
|
|
? 0 : sMinForgetSkippableTime;
|
|
|
|
if (sPostGCEventsToConsole) {
|
|
nsCString mergeMsg;
|
|
if (mergingCC) {
|
|
mergeMsg.AssignLiteral(" merged");
|
|
}
|
|
|
|
nsCString gcMsg;
|
|
if (ccResults.mForcedGC) {
|
|
gcMsg.AssignLiteral(", forced a GC");
|
|
}
|
|
|
|
NS_NAMED_MULTILINE_LITERAL_STRING(kFmt,
|
|
NS_LL("CC(T+%.1f) duration: %lums, suspected: %lu, visited: %lu RCed and %lu%s GCed, collected: %lu RCed and %lu GCed (%lu|%lu waiting for GC)%s\n")
|
|
NS_LL("ForgetSkippable %lu times before CC, min: %lu ms, max: %lu ms, avg: %lu ms, total: %lu ms, sync: %lu ms, removed: %lu"));
|
|
nsString msg;
|
|
msg.Adopt(nsTextFormatter::smprintf(kFmt.get(), double(delta) / PR_USEC_PER_SEC,
|
|
ccNowDuration, suspected,
|
|
ccResults.mVisitedRefCounted, ccResults.mVisitedGCed, mergeMsg.get(),
|
|
ccResults.mFreedRefCounted, ccResults.mFreedGCed,
|
|
sCCollectedWaitingForGC, sLikelyShortLivingObjectsNeedingGC,
|
|
gcMsg.get(),
|
|
sForgetSkippableBeforeCC,
|
|
minForgetSkippableTime / PR_USEC_PER_MSEC,
|
|
sMaxForgetSkippableTime / PR_USEC_PER_MSEC,
|
|
(sTotalForgetSkippableTime / cleanups) /
|
|
PR_USEC_PER_MSEC,
|
|
sTotalForgetSkippableTime / PR_USEC_PER_MSEC,
|
|
skippableDuration, sRemovedPurples));
|
|
nsCOMPtr<nsIConsoleService> cs =
|
|
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
|
|
if (cs) {
|
|
cs->LogStringMessage(msg.get());
|
|
}
|
|
}
|
|
|
|
if (sPostGCEventsToObserver) {
|
|
NS_NAMED_MULTILINE_LITERAL_STRING(kJSONFmt,
|
|
NS_LL("{ \"timestamp\": %llu, ")
|
|
NS_LL("\"duration\": %llu, ")
|
|
NS_LL("\"finish_gc_duration\": %llu, ")
|
|
NS_LL("\"sync_skippable_duration\": %llu, ")
|
|
NS_LL("\"suspected\": %lu, ")
|
|
NS_LL("\"visited\": { ")
|
|
NS_LL("\"RCed\": %lu, ")
|
|
NS_LL("\"GCed\": %lu }, ")
|
|
NS_LL("\"collected\": { ")
|
|
NS_LL("\"RCed\": %lu, ")
|
|
NS_LL("\"GCed\": %lu }, ")
|
|
NS_LL("\"waiting_for_gc\": %lu, ")
|
|
NS_LL("\"short_living_objects_waiting_for_gc\": %lu, ")
|
|
NS_LL("\"forced_gc\": %d, ")
|
|
NS_LL("\"forget_skippable\": { ")
|
|
NS_LL("\"times_before_cc\": %lu, ")
|
|
NS_LL("\"min\": %lu, ")
|
|
NS_LL("\"max\": %lu, ")
|
|
NS_LL("\"avg\": %lu, ")
|
|
NS_LL("\"total\": %lu, ")
|
|
NS_LL("\"removed\": %lu } ")
|
|
NS_LL("}"));
|
|
nsString json;
|
|
json.Adopt(nsTextFormatter::smprintf(kJSONFmt.get(), endCCTime,
|
|
ccNowDuration, gcDuration, skippableDuration,
|
|
suspected,
|
|
ccResults.mVisitedRefCounted, ccResults.mVisitedGCed,
|
|
ccResults.mFreedRefCounted, ccResults.mFreedGCed,
|
|
sCCollectedWaitingForGC,
|
|
sLikelyShortLivingObjectsNeedingGC,
|
|
ccResults.mForcedGC,
|
|
sForgetSkippableBeforeCC,
|
|
minForgetSkippableTime / PR_USEC_PER_MSEC,
|
|
sMaxForgetSkippableTime / PR_USEC_PER_MSEC,
|
|
(sTotalForgetSkippableTime / cleanups) /
|
|
PR_USEC_PER_MSEC,
|
|
sTotalForgetSkippableTime / PR_USEC_PER_MSEC,
|
|
sRemovedPurples));
|
|
nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService();
|
|
if (observerService) {
|
|
observerService->NotifyObservers(nullptr, "cycle-collection-statistics", json.get());
|
|
}
|
|
}
|
|
|
|
// Update global state to indicate we have just run a cycle collection.
|
|
sMinForgetSkippableTime = UINT32_MAX;
|
|
sMaxForgetSkippableTime = 0;
|
|
sTotalForgetSkippableTime = 0;
|
|
sRemovedPurples = 0;
|
|
sForgetSkippableBeforeCC = 0;
|
|
sNeedsFullCC = false;
|
|
}
|
|
|
|
// static
|
|
void
|
|
InterSliceGCTimerFired(nsITimer *aTimer, void *aClosure)
|
|
{
|
|
NS_RELEASE(sInterSliceGCTimer);
|
|
nsJSContext::GarbageCollectNow(JS::gcreason::INTER_SLICE_GC,
|
|
nsJSContext::IncrementalGC,
|
|
nsJSContext::CompartmentGC,
|
|
nsJSContext::NonShrinkingGC,
|
|
NS_INTERSLICE_GC_BUDGET);
|
|
}
|
|
|
|
// static
|
|
void
|
|
GCTimerFired(nsITimer *aTimer, void *aClosure)
|
|
{
|
|
NS_RELEASE(sGCTimer);
|
|
|
|
uintptr_t reason = reinterpret_cast<uintptr_t>(aClosure);
|
|
nsJSContext::GarbageCollectNow(static_cast<JS::gcreason::Reason>(reason),
|
|
nsJSContext::IncrementalGC,
|
|
nsJSContext::CompartmentGC);
|
|
}
|
|
|
|
void
|
|
ShrinkGCBuffersTimerFired(nsITimer *aTimer, void *aClosure)
|
|
{
|
|
NS_RELEASE(sShrinkGCBuffersTimer);
|
|
|
|
nsJSContext::ShrinkGCBuffersNow();
|
|
}
|
|
|
|
static bool
|
|
ShouldTriggerCC(uint32_t aSuspected)
|
|
{
|
|
return sNeedsFullCC ||
|
|
aSuspected > NS_CC_PURPLE_LIMIT ||
|
|
(aSuspected > NS_CC_FORCED_PURPLE_LIMIT &&
|
|
sLastCCEndTime + NS_CC_FORCED < PR_Now());
|
|
}
|
|
|
|
static void
|
|
CCTimerFired(nsITimer *aTimer, void *aClosure)
|
|
{
|
|
if (sDidShutdown) {
|
|
return;
|
|
}
|
|
|
|
static uint32_t ccDelay = NS_CC_DELAY;
|
|
if (sCCLockedOut) {
|
|
ccDelay = NS_CC_DELAY / 3;
|
|
|
|
PRTime now = PR_Now();
|
|
if (sCCLockedOutTime == 0) {
|
|
// Reset sCCTimerFireCount so that we run forgetSkippable
|
|
// often enough before CC. Because of reduced ccDelay
|
|
// forgetSkippable will be called just a few times.
|
|
// NS_MAX_CC_LOCKEDOUT_TIME limit guarantees that we end up calling
|
|
// forgetSkippable and CycleCollectNow eventually.
|
|
sCCTimerFireCount = 0;
|
|
sCCLockedOutTime = now;
|
|
return;
|
|
}
|
|
if (now - sCCLockedOutTime < NS_MAX_CC_LOCKEDOUT_TIME) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
++sCCTimerFireCount;
|
|
|
|
// During early timer fires, we only run forgetSkippable. During the first
|
|
// late timer fire, we decide if we are going to have a second and final
|
|
// late timer fire, where we may run the CC.
|
|
const uint32_t numEarlyTimerFires = ccDelay / NS_CC_SKIPPABLE_DELAY - 2;
|
|
bool isLateTimerFire = sCCTimerFireCount > numEarlyTimerFires;
|
|
uint32_t suspected = nsCycleCollector_suspectedCount();
|
|
if (isLateTimerFire && ShouldTriggerCC(suspected)) {
|
|
if (sCCTimerFireCount == numEarlyTimerFires + 1) {
|
|
FireForgetSkippable(suspected, true);
|
|
if (ShouldTriggerCC(nsCycleCollector_suspectedCount())) {
|
|
// Our efforts to avoid a CC have failed, so we return to let the
|
|
// timer fire once more to trigger a CC.
|
|
return;
|
|
}
|
|
} else {
|
|
// We are in the final timer fire and still meet the conditions for
|
|
// triggering a CC. Let CycleCollectNow finish the current IGC, if any,
|
|
// because that will allow us to include the GC time in the CC pause.
|
|
nsJSContext::CycleCollectNow(nullptr, 0, false);
|
|
}
|
|
} else if ((sPreviousSuspectedCount + 100) <= suspected) {
|
|
// Only do a forget skippable if there are more than a few new objects.
|
|
FireForgetSkippable(suspected, false);
|
|
}
|
|
|
|
if (isLateTimerFire) {
|
|
ccDelay = NS_CC_DELAY;
|
|
|
|
// We have either just run the CC or decided we don't want to run the CC
|
|
// next time, so kill the timer.
|
|
sPreviousSuspectedCount = 0;
|
|
nsJSContext::KillCCTimer();
|
|
}
|
|
}
|
|
|
|
// static
|
|
uint32_t
|
|
nsJSContext::CleanupsSinceLastGC()
|
|
{
|
|
return sCleanupsSinceLastGC;
|
|
}
|
|
|
|
// static
|
|
void
|
|
nsJSContext::LoadStart()
|
|
{
|
|
sLoadingInProgress = true;
|
|
++sPendingLoadCount;
|
|
}
|
|
|
|
// static
|
|
void
|
|
nsJSContext::LoadEnd()
|
|
{
|
|
if (!sLoadingInProgress)
|
|
return;
|
|
|
|
// sPendingLoadCount is not a well managed load counter (and doesn't
|
|
// need to be), so make sure we don't make it wrap backwards here.
|
|
if (sPendingLoadCount > 0) {
|
|
--sPendingLoadCount;
|
|
return;
|
|
}
|
|
|
|
// Its probably a good idea to GC soon since we have finished loading.
|
|
sLoadingInProgress = false;
|
|
PokeGC(JS::gcreason::LOAD_END);
|
|
}
|
|
|
|
// static
|
|
void
|
|
nsJSContext::PokeGC(JS::gcreason::Reason aReason, int aDelay)
|
|
{
|
|
if (sGCTimer || sShuttingDown) {
|
|
// There's already a timer for GC'ing, just return
|
|
return;
|
|
}
|
|
|
|
CallCreateInstance("@mozilla.org/timer;1", &sGCTimer);
|
|
|
|
if (!sGCTimer) {
|
|
// Failed to create timer (probably because we're in XPCOM shutdown)
|
|
return;
|
|
}
|
|
|
|
static bool first = true;
|
|
|
|
sGCTimer->InitWithFuncCallback(GCTimerFired, reinterpret_cast<void *>(aReason),
|
|
aDelay
|
|
? aDelay
|
|
: (first
|
|
? NS_FIRST_GC_DELAY
|
|
: NS_GC_DELAY),
|
|
nsITimer::TYPE_ONE_SHOT);
|
|
|
|
first = false;
|
|
}
|
|
|
|
// static
|
|
void
|
|
nsJSContext::PokeShrinkGCBuffers()
|
|
{
|
|
if (sShrinkGCBuffersTimer || sShuttingDown) {
|
|
return;
|
|
}
|
|
|
|
CallCreateInstance("@mozilla.org/timer;1", &sShrinkGCBuffersTimer);
|
|
|
|
if (!sShrinkGCBuffersTimer) {
|
|
// Failed to create timer (probably because we're in XPCOM shutdown)
|
|
return;
|
|
}
|
|
|
|
sShrinkGCBuffersTimer->InitWithFuncCallback(ShrinkGCBuffersTimerFired, nullptr,
|
|
NS_SHRINK_GC_BUFFERS_DELAY,
|
|
nsITimer::TYPE_ONE_SHOT);
|
|
}
|
|
|
|
// static
|
|
void
|
|
nsJSContext::MaybePokeCC()
|
|
{
|
|
if (sCCTimer || sShuttingDown || !sHasRunGC) {
|
|
return;
|
|
}
|
|
|
|
if (ShouldTriggerCC(nsCycleCollector_suspectedCount())) {
|
|
sCCTimerFireCount = 0;
|
|
CallCreateInstance("@mozilla.org/timer;1", &sCCTimer);
|
|
if (!sCCTimer) {
|
|
return;
|
|
}
|
|
sCCTimer->InitWithFuncCallback(CCTimerFired, nullptr,
|
|
NS_CC_SKIPPABLE_DELAY,
|
|
nsITimer::TYPE_REPEATING_SLACK);
|
|
}
|
|
}
|
|
|
|
//static
|
|
void
|
|
nsJSContext::KillGCTimer()
|
|
{
|
|
if (sGCTimer) {
|
|
sGCTimer->Cancel();
|
|
|
|
NS_RELEASE(sGCTimer);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsJSContext::KillFullGCTimer()
|
|
{
|
|
if (sFullGCTimer) {
|
|
sFullGCTimer->Cancel();
|
|
NS_RELEASE(sFullGCTimer);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsJSContext::KillInterSliceGCTimer()
|
|
{
|
|
if (sInterSliceGCTimer) {
|
|
sInterSliceGCTimer->Cancel();
|
|
NS_RELEASE(sInterSliceGCTimer);
|
|
}
|
|
}
|
|
|
|
//static
|
|
void
|
|
nsJSContext::KillShrinkGCBuffersTimer()
|
|
{
|
|
if (sShrinkGCBuffersTimer) {
|
|
sShrinkGCBuffersTimer->Cancel();
|
|
|
|
NS_RELEASE(sShrinkGCBuffersTimer);
|
|
}
|
|
}
|
|
|
|
//static
|
|
void
|
|
nsJSContext::KillCCTimer()
|
|
{
|
|
sCCLockedOutTime = 0;
|
|
|
|
if (sCCTimer) {
|
|
sCCTimer->Cancel();
|
|
|
|
NS_RELEASE(sCCTimer);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsJSContext::GC(JS::gcreason::Reason aReason)
|
|
{
|
|
mActive = true;
|
|
PokeGC(aReason);
|
|
}
|
|
|
|
class NotifyGCEndRunnable : public nsRunnable
|
|
{
|
|
nsString mMessage;
|
|
|
|
public:
|
|
NotifyGCEndRunnable(const nsString& aMessage) : mMessage(aMessage) {}
|
|
|
|
NS_DECL_NSIRUNNABLE
|
|
};
|
|
|
|
NS_IMETHODIMP
|
|
NotifyGCEndRunnable::Run()
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
nsCOMPtr<nsIObserverService> observerService = mozilla::services::GetObserverService();
|
|
if (!observerService) {
|
|
return NS_OK;
|
|
}
|
|
|
|
const jschar oomMsg[3] = { '{', '}', 0 };
|
|
const jschar *toSend = mMessage.get() ? mMessage.get() : oomMsg;
|
|
observerService->NotifyObservers(nullptr, "garbage-collection-statistics", toSend);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
static void
|
|
DOMGCSliceCallback(JSRuntime *aRt, JS::GCProgress aProgress, const JS::GCDescription &aDesc)
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "GCs must run on the main thread");
|
|
|
|
if (aProgress == JS::GC_CYCLE_END) {
|
|
PRTime delta = GetCollectionTimeDelta();
|
|
|
|
if (sPostGCEventsToConsole) {
|
|
NS_NAMED_LITERAL_STRING(kFmt, "GC(T+%.1f) ");
|
|
nsString prefix, gcstats;
|
|
gcstats.Adopt(aDesc.formatMessage(aRt));
|
|
prefix.Adopt(nsTextFormatter::smprintf(kFmt.get(),
|
|
double(delta) / PR_USEC_PER_SEC));
|
|
nsString msg = prefix + gcstats;
|
|
nsCOMPtr<nsIConsoleService> cs = do_GetService(NS_CONSOLESERVICE_CONTRACTID);
|
|
if (cs) {
|
|
cs->LogStringMessage(msg.get());
|
|
}
|
|
}
|
|
|
|
if (sPostGCEventsToObserver) {
|
|
nsString json;
|
|
json.Adopt(aDesc.formatJSON(aRt, PR_Now()));
|
|
nsRefPtr<NotifyGCEndRunnable> notify = new NotifyGCEndRunnable(json);
|
|
NS_DispatchToMainThread(notify);
|
|
}
|
|
}
|
|
|
|
// Prevent cycle collections and shrinking during incremental GC.
|
|
if (aProgress == JS::GC_CYCLE_BEGIN) {
|
|
sCCLockedOut = true;
|
|
nsJSContext::KillShrinkGCBuffersTimer();
|
|
} else if (aProgress == JS::GC_CYCLE_END) {
|
|
sCCLockedOut = false;
|
|
}
|
|
|
|
// The GC has more work to do, so schedule another GC slice.
|
|
if (aProgress == JS::GC_SLICE_END) {
|
|
nsJSContext::KillInterSliceGCTimer();
|
|
if (!sShuttingDown) {
|
|
CallCreateInstance("@mozilla.org/timer;1", &sInterSliceGCTimer);
|
|
sInterSliceGCTimer->InitWithFuncCallback(InterSliceGCTimerFired,
|
|
NULL,
|
|
NS_INTERSLICE_GC_DELAY,
|
|
nsITimer::TYPE_ONE_SHOT);
|
|
}
|
|
}
|
|
|
|
if (aProgress == JS::GC_CYCLE_END) {
|
|
// May need to kill the inter-slice GC timer
|
|
nsJSContext::KillInterSliceGCTimer();
|
|
|
|
sCCollectedWaitingForGC = 0;
|
|
sLikelyShortLivingObjectsNeedingGC = 0;
|
|
sCleanupsSinceLastGC = 0;
|
|
sNeedsFullCC = true;
|
|
sHasRunGC = true;
|
|
nsJSContext::MaybePokeCC();
|
|
|
|
if (aDesc.isCompartment_) {
|
|
++sCompartmentGCCount;
|
|
if (!sFullGCTimer && !sShuttingDown) {
|
|
CallCreateInstance("@mozilla.org/timer;1", &sFullGCTimer);
|
|
JS::gcreason::Reason reason = JS::gcreason::FULL_GC_TIMER;
|
|
sFullGCTimer->InitWithFuncCallback(FullGCTimerFired,
|
|
reinterpret_cast<void *>(reason),
|
|
NS_FULL_GC_DELAY,
|
|
nsITimer::TYPE_ONE_SHOT);
|
|
}
|
|
} else {
|
|
sCompartmentGCCount = 0;
|
|
nsJSContext::KillFullGCTimer();
|
|
|
|
// Avoid shrinking during heavy activity, which is suggested by
|
|
// compartment GC.
|
|
nsJSContext::PokeShrinkGCBuffers();
|
|
}
|
|
}
|
|
|
|
if (sPrevGCSliceCallback)
|
|
(*sPrevGCSliceCallback)(aRt, aProgress, aDesc);
|
|
}
|
|
|
|
static void
|
|
DOMAnalysisPurgeCallback(JSRuntime *aRt, JSFlatString *aDesc)
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "GCs must run on the main thread");
|
|
|
|
PRTime delta = GetCollectionTimeDelta();
|
|
|
|
if (sPostGCEventsToConsole) {
|
|
NS_NAMED_LITERAL_STRING(kFmt, "Analysis Purge (T+%.1f) ");
|
|
nsString prefix;
|
|
prefix.Adopt(nsTextFormatter::smprintf(kFmt.get(),
|
|
double(delta) / PR_USEC_PER_SEC));
|
|
|
|
nsDependentJSString stats(aDesc);
|
|
nsString msg = prefix + stats;
|
|
|
|
nsCOMPtr<nsIConsoleService> cs = do_GetService(NS_CONSOLESERVICE_CONTRACTID);
|
|
if (cs) {
|
|
cs->LogStringMessage(msg.get());
|
|
}
|
|
}
|
|
|
|
if (sPrevAnalysisPurgeCallback)
|
|
(*sPrevAnalysisPurgeCallback)(aRt, aDesc);
|
|
}
|
|
|
|
void
|
|
nsJSContext::ReportPendingException()
|
|
{
|
|
if (mIsInitialized) {
|
|
nsJSUtils::ReportPendingException(mContext);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsJSContext::LikelyShortLivingObjectCreated()
|
|
{
|
|
++sLikelyShortLivingObjectsNeedingGC;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* nsJSRuntime implementation
|
|
*********************************************************************/
|
|
|
|
// QueryInterface implementation for nsJSRuntime
|
|
NS_INTERFACE_MAP_BEGIN(nsJSRuntime)
|
|
NS_INTERFACE_MAP_ENTRY(nsIScriptRuntime)
|
|
NS_INTERFACE_MAP_END
|
|
|
|
|
|
NS_IMPL_ADDREF(nsJSRuntime)
|
|
NS_IMPL_RELEASE(nsJSRuntime)
|
|
|
|
already_AddRefed<nsIScriptContext>
|
|
nsJSRuntime::CreateContext(bool aGCOnDestruction,
|
|
nsIScriptGlobalObject* aGlobalObject)
|
|
{
|
|
nsCOMPtr<nsIScriptContext> scriptContext =
|
|
new nsJSContext(sRuntime, aGCOnDestruction, aGlobalObject);
|
|
return scriptContext.forget();
|
|
}
|
|
|
|
//static
|
|
void
|
|
nsJSRuntime::Startup()
|
|
{
|
|
// initialize all our statics, so that we can restart XPCOM
|
|
sGCTimer = sFullGCTimer = sCCTimer = nullptr;
|
|
sCCLockedOut = false;
|
|
sCCLockedOutTime = 0;
|
|
sLastCCEndTime = 0;
|
|
sHasRunGC = false;
|
|
sPendingLoadCount = 0;
|
|
sLoadingInProgress = false;
|
|
sCCollectedWaitingForGC = 0;
|
|
sLikelyShortLivingObjectsNeedingGC = 0;
|
|
sPostGCEventsToConsole = false;
|
|
sDisableExplicitCompartmentGC = false;
|
|
sNeedsFullCC = false;
|
|
gNameSpaceManager = nullptr;
|
|
sRuntimeService = nullptr;
|
|
sRuntime = nullptr;
|
|
sIsInitialized = false;
|
|
sDidShutdown = false;
|
|
sShuttingDown = false;
|
|
sContextCount = 0;
|
|
sSecurityManager = nullptr;
|
|
}
|
|
|
|
static int
|
|
MaxScriptRunTimePrefChangedCallback(const char *aPrefName, void *aClosure)
|
|
{
|
|
// Default limit on script run time to 10 seconds. 0 means let
|
|
// scripts run forever.
|
|
bool isChromePref =
|
|
strcmp(aPrefName, "dom.max_chrome_script_run_time") == 0;
|
|
int32_t time = Preferences::GetInt(aPrefName, isChromePref ? 20 : 10);
|
|
|
|
PRTime t;
|
|
if (time <= 0) {
|
|
t = NS_UNLIMITED_SCRIPT_RUNTIME;
|
|
} else {
|
|
t = time * PR_USEC_PER_SEC;
|
|
}
|
|
|
|
if (isChromePref) {
|
|
sMaxChromeScriptRunTime = t;
|
|
} else {
|
|
sMaxScriptRunTime = t;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ReportAllJSExceptionsPrefChangedCallback(const char* aPrefName, void* aClosure)
|
|
{
|
|
bool reportAll = Preferences::GetBool(aPrefName, false);
|
|
nsContentUtils::XPConnect()->SetReportAllJSExceptions(reportAll);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
SetMemoryHighWaterMarkPrefChangedCallback(const char* aPrefName, void* aClosure)
|
|
{
|
|
int32_t highwatermark = Preferences::GetInt(aPrefName, 128);
|
|
|
|
JS_SetGCParameter(nsJSRuntime::sRuntime, JSGC_MAX_MALLOC_BYTES,
|
|
highwatermark * 1024L * 1024L);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
SetMemoryMaxPrefChangedCallback(const char* aPrefName, void* aClosure)
|
|
{
|
|
int32_t pref = Preferences::GetInt(aPrefName, -1);
|
|
// handle overflow and negative pref values
|
|
uint32_t max = (pref <= 0 || pref >= 0x1000) ? -1 : (uint32_t)pref * 1024 * 1024;
|
|
JS_SetGCParameter(nsJSRuntime::sRuntime, JSGC_MAX_BYTES, max);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
SetMemoryGCModePrefChangedCallback(const char* aPrefName, void* aClosure)
|
|
{
|
|
bool enableCompartmentGC = Preferences::GetBool("javascript.options.mem.gc_per_compartment");
|
|
bool enableIncrementalGC = Preferences::GetBool("javascript.options.mem.gc_incremental");
|
|
JSGCMode mode;
|
|
if (enableIncrementalGC) {
|
|
mode = JSGC_MODE_INCREMENTAL;
|
|
} else if (enableCompartmentGC) {
|
|
mode = JSGC_MODE_COMPARTMENT;
|
|
} else {
|
|
mode = JSGC_MODE_GLOBAL;
|
|
}
|
|
JS_SetGCParameter(nsJSRuntime::sRuntime, JSGC_MODE, mode);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
SetMemoryGCSliceTimePrefChangedCallback(const char* aPrefName, void* aClosure)
|
|
{
|
|
int32_t pref = Preferences::GetInt(aPrefName, -1);
|
|
// handle overflow and negative pref values
|
|
if (pref > 0 && pref < 100000)
|
|
JS_SetGCParameter(nsJSRuntime::sRuntime, JSGC_SLICE_TIME_BUDGET, pref);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
SetMemoryGCPrefChangedCallback(const char* aPrefName, void* aClosure)
|
|
{
|
|
int32_t pref = Preferences::GetInt(aPrefName, -1);
|
|
// handle overflow and negative pref values
|
|
if (pref > 0 && pref < 10000)
|
|
JS_SetGCParameter(nsJSRuntime::sRuntime, (JSGCParamKey)(intptr_t)aClosure, pref);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
SetMemoryGCDynamicHeapGrowthPrefChangedCallback(const char* aPrefName, void* aClosure)
|
|
{
|
|
bool pref = Preferences::GetBool(aPrefName);
|
|
JS_SetGCParameter(nsJSRuntime::sRuntime, JSGC_DYNAMIC_HEAP_GROWTH, pref);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
SetMemoryGCDynamicMarkSlicePrefChangedCallback(const char* aPrefName, void* aClosure)
|
|
{
|
|
bool pref = Preferences::GetBool(aPrefName);
|
|
JS_SetGCParameter(nsJSRuntime::sRuntime, JSGC_DYNAMIC_MARK_SLICE, pref);
|
|
return 0;
|
|
}
|
|
|
|
JSObject*
|
|
NS_DOMReadStructuredClone(JSContext* cx,
|
|
JSStructuredCloneReader* reader,
|
|
uint32_t tag,
|
|
uint32_t data,
|
|
void* closure)
|
|
{
|
|
if (tag == SCTAG_DOM_IMAGEDATA) {
|
|
// Read the information out of the stream.
|
|
uint32_t width, height;
|
|
JS::Value dataArray;
|
|
if (!JS_ReadUint32Pair(reader, &width, &height) ||
|
|
!JS_ReadTypedArray(reader, &dataArray)) {
|
|
return nullptr;
|
|
}
|
|
MOZ_ASSERT(dataArray.isObject());
|
|
|
|
// Construct the ImageData.
|
|
nsRefPtr<ImageData> imageData = new ImageData(width, height,
|
|
dataArray.toObject());
|
|
// Wrap it in a JS::Value.
|
|
JS::Rooted<JSObject*> global(cx, JS_GetGlobalForScopeChain(cx));
|
|
if (!global) {
|
|
return nullptr;
|
|
}
|
|
return imageData->WrapObject(cx, global);
|
|
}
|
|
|
|
// Don't know what this is. Bail.
|
|
xpc::Throw(cx, NS_ERROR_DOM_DATA_CLONE_ERR);
|
|
return nullptr;
|
|
}
|
|
|
|
JSBool
|
|
NS_DOMWriteStructuredClone(JSContext* cx,
|
|
JSStructuredCloneWriter* writer,
|
|
JSObject* obj,
|
|
void *closure)
|
|
{
|
|
ImageData* imageData;
|
|
nsresult rv = UnwrapObject<ImageData>(cx, obj, imageData);
|
|
if (NS_FAILED(rv)) {
|
|
// Don't know what this is. Bail.
|
|
xpc::Throw(cx, NS_ERROR_DOM_DATA_CLONE_ERR);
|
|
return JS_FALSE;
|
|
}
|
|
|
|
// Prepare the ImageData internals.
|
|
uint32_t width = imageData->Width();
|
|
uint32_t height = imageData->Height();
|
|
JSObject *dataArray = imageData->GetDataObject();
|
|
|
|
// Write the internals to the stream.
|
|
JSAutoCompartment ac(cx, dataArray);
|
|
return JS_WriteUint32Pair(writer, SCTAG_DOM_IMAGEDATA, 0) &&
|
|
JS_WriteUint32Pair(writer, width, height) &&
|
|
JS_WriteTypedArray(writer, JS::ObjectValue(*dataArray));
|
|
}
|
|
|
|
void
|
|
NS_DOMStructuredCloneError(JSContext* cx,
|
|
uint32_t errorid)
|
|
{
|
|
// We don't currently support any extensions to structured cloning.
|
|
xpc::Throw(cx, NS_ERROR_DOM_DATA_CLONE_ERR);
|
|
}
|
|
|
|
//static
|
|
nsresult
|
|
nsJSRuntime::Init()
|
|
{
|
|
if (sIsInitialized) {
|
|
if (!nsContentUtils::XPConnect())
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult rv = CallGetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID,
|
|
&sSecurityManager);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = CallGetService(kJSRuntimeServiceContractID, &sRuntimeService);
|
|
// get the JSRuntime from the runtime svc, if possible
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = sRuntimeService->GetRuntime(&sRuntime);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Let's make sure that our main thread is the same as the xpcom main thread.
|
|
NS_ASSERTION(NS_IsMainThread(), "bad");
|
|
|
|
sPrevGCSliceCallback = JS::SetGCSliceCallback(sRuntime, DOMGCSliceCallback);
|
|
sPrevAnalysisPurgeCallback = js::SetAnalysisPurgeCallback(sRuntime, DOMAnalysisPurgeCallback);
|
|
|
|
// Set up the structured clone callbacks.
|
|
static JSStructuredCloneCallbacks cloneCallbacks = {
|
|
NS_DOMReadStructuredClone,
|
|
NS_DOMWriteStructuredClone,
|
|
NS_DOMStructuredCloneError
|
|
};
|
|
JS_SetStructuredCloneCallbacks(sRuntime, &cloneCallbacks);
|
|
|
|
static js::DOMCallbacks DOMcallbacks = {
|
|
InstanceClassHasProtoAtDepth
|
|
};
|
|
SetDOMCallbacks(sRuntime, &DOMcallbacks);
|
|
|
|
// Set these global xpconnect options...
|
|
Preferences::RegisterCallbackAndCall(MaxScriptRunTimePrefChangedCallback,
|
|
"dom.max_script_run_time");
|
|
|
|
Preferences::RegisterCallbackAndCall(MaxScriptRunTimePrefChangedCallback,
|
|
"dom.max_chrome_script_run_time");
|
|
|
|
Preferences::RegisterCallbackAndCall(ReportAllJSExceptionsPrefChangedCallback,
|
|
"dom.report_all_js_exceptions");
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryHighWaterMarkPrefChangedCallback,
|
|
"javascript.options.mem.high_water_mark");
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryMaxPrefChangedCallback,
|
|
"javascript.options.mem.max");
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCModePrefChangedCallback,
|
|
"javascript.options.mem.gc_per_compartment");
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCModePrefChangedCallback,
|
|
"javascript.options.mem.gc_incremental");
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCSliceTimePrefChangedCallback,
|
|
"javascript.options.mem.gc_incremental_slice_ms");
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCPrefChangedCallback,
|
|
"javascript.options.mem.gc_high_frequency_time_limit_ms",
|
|
(void *)JSGC_HIGH_FREQUENCY_TIME_LIMIT);
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCDynamicMarkSlicePrefChangedCallback,
|
|
"javascript.options.mem.gc_dynamic_mark_slice");
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCDynamicHeapGrowthPrefChangedCallback,
|
|
"javascript.options.mem.gc_dynamic_heap_growth");
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCPrefChangedCallback,
|
|
"javascript.options.mem.gc_low_frequency_heap_growth",
|
|
(void *)JSGC_LOW_FREQUENCY_HEAP_GROWTH);
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCPrefChangedCallback,
|
|
"javascript.options.mem.gc_high_frequency_heap_growth_min",
|
|
(void *)JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN);
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCPrefChangedCallback,
|
|
"javascript.options.mem.gc_high_frequency_heap_growth_max",
|
|
(void *)JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX);
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCPrefChangedCallback,
|
|
"javascript.options.mem.gc_high_frequency_low_limit_mb",
|
|
(void *)JSGC_HIGH_FREQUENCY_LOW_LIMIT);
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCPrefChangedCallback,
|
|
"javascript.options.mem.gc_high_frequency_high_limit_mb",
|
|
(void *)JSGC_HIGH_FREQUENCY_HIGH_LIMIT);
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCPrefChangedCallback,
|
|
"javascript.options.mem.analysis_purge_mb",
|
|
(void *)JSGC_ANALYSIS_PURGE_TRIGGER);
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCPrefChangedCallback,
|
|
"javascript.options.mem.gc_allocation_threshold_mb",
|
|
(void *)JSGC_ALLOCATION_THRESHOLD);
|
|
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
|
|
if (!obs)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
Preferences::AddBoolVarCache(&sGCOnMemoryPressure,
|
|
"javascript.options.gc_on_memory_pressure",
|
|
true);
|
|
|
|
nsIObserver* observer = new nsJSEnvironmentObserver();
|
|
obs->AddObserver(observer, "memory-pressure", false);
|
|
obs->AddObserver(observer, "quit-application", false);
|
|
|
|
sIsInitialized = true;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
//static
|
|
nsScriptNameSpaceManager*
|
|
nsJSRuntime::GetNameSpaceManager()
|
|
{
|
|
if (sDidShutdown)
|
|
return nullptr;
|
|
|
|
if (!gNameSpaceManager) {
|
|
gNameSpaceManager = new nsScriptNameSpaceManager;
|
|
NS_ADDREF(gNameSpaceManager);
|
|
|
|
nsresult rv = gNameSpaceManager->Init();
|
|
NS_ENSURE_SUCCESS(rv, nullptr);
|
|
}
|
|
|
|
return gNameSpaceManager;
|
|
}
|
|
|
|
/* static */
|
|
void
|
|
nsJSRuntime::Shutdown()
|
|
{
|
|
KillTimers();
|
|
|
|
NS_IF_RELEASE(gNameSpaceManager);
|
|
|
|
if (!sContextCount) {
|
|
// We're being shutdown, and there are no more contexts
|
|
// alive, release the JS runtime service and the security manager.
|
|
|
|
NS_IF_RELEASE(sRuntimeService);
|
|
NS_IF_RELEASE(sSecurityManager);
|
|
}
|
|
|
|
sShuttingDown = true;
|
|
sDidShutdown = true;
|
|
}
|
|
|
|
// A factory for the runtime.
|
|
nsresult NS_CreateJSRuntime(nsIScriptRuntime **aRuntime)
|
|
{
|
|
nsresult rv = nsJSRuntime::Init();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
*aRuntime = new nsJSRuntime();
|
|
if (*aRuntime == nullptr)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
NS_IF_ADDREF(*aRuntime);
|
|
return NS_OK;
|
|
}
|
|
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// A fast-array class for JS. This class supports both nsIJSScriptArray and
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// nsIArray. If it is JS itself providing and consuming this class, all work
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// can be done via nsIJSScriptArray, and avoid the conversion of elements
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// to/from nsISupports.
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// When consumed by non-JS (eg, another script language), conversion is done
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// on-the-fly.
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class nsJSArgArray MOZ_FINAL : public nsIJSArgArray {
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public:
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nsJSArgArray(JSContext *aContext, uint32_t argc, JS::Value *argv,
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nsresult *prv);
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~nsJSArgArray();
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// nsISupports
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsJSArgArray,
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nsIJSArgArray)
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// nsIArray
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NS_DECL_NSIARRAY
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// nsIJSArgArray
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nsresult GetArgs(uint32_t *argc, void **argv);
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void ReleaseJSObjects();
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protected:
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JSContext *mContext;
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JS::Value *mArgv;
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uint32_t mArgc;
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};
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nsJSArgArray::nsJSArgArray(JSContext *aContext, uint32_t argc, JS::Value *argv,
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nsresult *prv) :
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mContext(aContext),
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mArgv(nullptr),
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mArgc(argc)
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{
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// copy the array - we don't know its lifetime, and ours is tied to xpcom
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// refcounting. Alloc zero'd array so cleanup etc is safe.
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if (argc) {
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mArgv = (JS::Value *) PR_CALLOC(argc * sizeof(JS::Value));
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if (!mArgv) {
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*prv = NS_ERROR_OUT_OF_MEMORY;
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return;
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}
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}
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// Callers are allowed to pass in a null argv even for argc > 0. They can
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// then use GetArgs to initialize the values.
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if (argv) {
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for (uint32_t i = 0; i < argc; ++i)
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mArgv[i] = argv[i];
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}
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if (argc > 0) {
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NS_HOLD_JS_OBJECTS(this, nsJSArgArray);
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}
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*prv = NS_OK;
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}
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nsJSArgArray::~nsJSArgArray()
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{
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ReleaseJSObjects();
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}
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void
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nsJSArgArray::ReleaseJSObjects()
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{
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if (mArgv) {
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PR_DELETE(mArgv);
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}
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if (mArgc > 0) {
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mArgc = 0;
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NS_DROP_JS_OBJECTS(this, nsJSArgArray);
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}
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}
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// QueryInterface implementation for nsJSArgArray
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsJSArgArray)
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tmp->ReleaseJSObjects();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsJSArgArray)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsJSArgArray)
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JS::Value *argv = tmp->mArgv;
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if (argv) {
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JS::Value *end;
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for (end = argv + tmp->mArgc; argv < end; ++argv) {
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if (JSVAL_IS_GCTHING(*argv))
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NS_IMPL_CYCLE_COLLECTION_TRACE_JS_CALLBACK(JSVAL_TO_GCTHING(*argv),
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"mArgv[i]")
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}
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}
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsJSArgArray)
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NS_INTERFACE_MAP_ENTRY(nsIArray)
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NS_INTERFACE_MAP_ENTRY(nsIJSArgArray)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIJSArgArray)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsJSArgArray)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsJSArgArray)
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nsresult
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nsJSArgArray::GetArgs(uint32_t *argc, void **argv)
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{
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*argv = (void *)mArgv;
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*argc = mArgc;
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return NS_OK;
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}
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// nsIArray impl
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NS_IMETHODIMP nsJSArgArray::GetLength(uint32_t *aLength)
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{
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*aLength = mArgc;
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return NS_OK;
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}
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/* void queryElementAt (in unsigned long index, in nsIIDRef uuid, [iid_is (uuid), retval] out nsQIResult result); */
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NS_IMETHODIMP nsJSArgArray::QueryElementAt(uint32_t index, const nsIID & uuid, void * *result)
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{
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*result = nullptr;
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if (index >= mArgc)
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return NS_ERROR_INVALID_ARG;
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if (uuid.Equals(NS_GET_IID(nsIVariant)) || uuid.Equals(NS_GET_IID(nsISupports))) {
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return nsContentUtils::XPConnect()->JSToVariant(mContext, mArgv[index],
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(nsIVariant **)result);
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}
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NS_WARNING("nsJSArgArray only handles nsIVariant");
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return NS_ERROR_NO_INTERFACE;
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}
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/* unsigned long indexOf (in unsigned long startIndex, in nsISupports element); */
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NS_IMETHODIMP nsJSArgArray::IndexOf(uint32_t startIndex, nsISupports *element, uint32_t *_retval)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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/* nsISimpleEnumerator enumerate (); */
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NS_IMETHODIMP nsJSArgArray::Enumerate(nsISimpleEnumerator **_retval)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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// The factory function
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nsresult NS_CreateJSArgv(JSContext *aContext, uint32_t argc, void *argv,
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nsIJSArgArray **aArray)
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{
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nsresult rv;
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nsJSArgArray *ret = new nsJSArgArray(aContext, argc,
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static_cast<JS::Value *>(argv), &rv);
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if (ret == nullptr)
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return NS_ERROR_OUT_OF_MEMORY;
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if (NS_FAILED(rv)) {
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delete ret;
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return rv;
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}
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return ret->QueryInterface(NS_GET_IID(nsIArray), (void **)aArray);
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}
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