mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 06:35:42 +00:00
919587b427
We now have the invariant that any in-use cx must be pushed onto the JSContext stack with one of our stack-scoped automatic nsCxPusher classes. These classes hold a strong ref to the nsIScriptContext associated with the JSContext they push (if any). This means that, if this cx is in use, we will always have at least one strong reference to the nsJSContext coming from the stack, meaning that neither the destructor nor the Unlink() implementation will be called. So we don't need to do any deferred destruction of the cx anymore.
3677 lines
109 KiB
C++
3677 lines
109 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 "nsCxPusher.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) {
|
|
nsIScriptGlobalObject *globalObject = context->GetGlobalObject();
|
|
|
|
if (globalObject) {
|
|
nsAutoString fileName, msg;
|
|
if (!report->filename) {
|
|
fileName.SetIsVoid(true);
|
|
} else {
|
|
fileName.AssignWithConversion(report->filename);
|
|
}
|
|
|
|
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
|
|
JS::RootedScript script(cx);
|
|
unsigned lineno;
|
|
JSBool hasFrame = ::JS_DescribeScriptedCaller(cx, script.address(), &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_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_asmjs_content_str[] = JS_OPTIONS_DOT_STR "asmjs";
|
|
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_baselinejit_eager_str[] = JS_OPTIONS_DOT_STR "baselinejit.unsafe_eager_compilation";
|
|
static const char js_ion_content_str[] = JS_OPTIONS_DOT_STR "ion.content";
|
|
static const char js_ion_eager_str[] = JS_OPTIONS_DOT_STR "ion.unsafe_eager_compilation";
|
|
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_EXTRA_WARNINGS;
|
|
else
|
|
newDefaultJSOptions &= ~JSOPTION_EXTRA_WARNINGS;
|
|
|
|
// 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 usePCCounts = Preferences::GetBool(chromeWindow || !contentWindow ?
|
|
js_pccounts_chrome_str :
|
|
js_pccounts_content_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 useBaselineJITEager = Preferences::GetBool(js_baselinejit_eager_str);
|
|
bool useIon = Preferences::GetBool(js_ion_content_str);
|
|
bool useIonEager = Preferences::GetBool(js_ion_eager_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) {
|
|
usePCCounts = false;
|
|
useTypeInference = false;
|
|
useHardening = false;
|
|
useBaselineJIT = false;
|
|
useBaselineJITEager = false;
|
|
useIon = false;
|
|
useIonEager = false;
|
|
useAsmJS = false;
|
|
}
|
|
}
|
|
|
|
if (usePCCounts)
|
|
newDefaultJSOptions |= JSOPTION_PCCOUNT;
|
|
else
|
|
newDefaultJSOptions &= ~JSOPTION_PCCOUNT;
|
|
|
|
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_EXTRA_WARNINGS) == 0) {
|
|
if (chromeWindow || !contentWindow)
|
|
newDefaultJSOptions |= JSOPTION_EXTRA_WARNINGS;
|
|
}
|
|
#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);
|
|
|
|
::JS_SetGlobalCompilerOption(context->mContext, JSCOMPILER_BASELINE_USECOUNT_TRIGGER,
|
|
(useBaselineJITEager ? 0 : -1));
|
|
|
|
::JS_SetGlobalCompilerOption(context->mContext, JSCOMPILER_ION_USECOUNT_TRIGGER,
|
|
(useIonEager ? 0 : -1));
|
|
|
|
// 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;
|
|
mScriptsEnabled = true;
|
|
mOperationCallbackTime = 0;
|
|
mModalStateTime = 0;
|
|
mModalStateDepth = 0;
|
|
mProcessingScriptTag = false;
|
|
}
|
|
|
|
nsJSContext::~nsJSContext()
|
|
{
|
|
*mPrev = mNext;
|
|
if (mNext) {
|
|
mNext->mPrev = mPrev;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
// This function is called either by the destructor or unlink, which means that
|
|
// it can never be called when there is an outstanding ref to the
|
|
// nsIScriptContext on the stack. Our stack-scoped cx pushers hold such a ref,
|
|
// so we can assume here that mContext is not on the stack (and therefore not
|
|
// in use).
|
|
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);
|
|
}
|
|
|
|
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(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,
|
|
JS::Handle<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);
|
|
|
|
// Scope the JSAutoCompartment so that it gets destroyed before we pop the
|
|
// cx and potentially call JS_RestoreFrameChain.
|
|
{
|
|
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;
|
|
}
|
|
|
|
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);
|
|
|
|
AutoPushJSContext cx(mContext);
|
|
JSAutoRequest ar(cx);
|
|
JS::Rooted<JSObject*> scopeObject(mContext, GetNativeGlobal());
|
|
xpc_UnmarkGrayObject(scopeObject);
|
|
|
|
bool ok = false;
|
|
|
|
nsresult rv = sSecurityManager->CanExecuteScripts(cx, 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;
|
|
|
|
JS::CompileOptions options(cx);
|
|
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(cx, scopeObject);
|
|
JSScript* script = JS::Compile(cx,
|
|
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_)
|
|
{
|
|
JSAutoRequest ar(mContext);
|
|
JS::Rooted<JSObject*> aScopeObject(mContext, aScopeObject_);
|
|
JS::Rooted<JSScript*> aScriptObject(mContext, aScriptObject_);
|
|
NS_ENSURE_TRUE(mIsInitialized, NS_ERROR_NOT_INITIALIZED);
|
|
|
|
if (!mScriptsEnabled) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsAutoMicroTask mt;
|
|
|
|
if (!aScopeObject) {
|
|
aScopeObject = GetNativeGlobal();
|
|
}
|
|
|
|
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);
|
|
|
|
// 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::Rooted<JS::Value> val(mContext);
|
|
if (!JS_ExecuteScript(mContext, aScopeObject, aScriptObject, val.address())) {
|
|
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,
|
|
JS::Handle<JSObject*> aScope,
|
|
JSObject** aRet)
|
|
{
|
|
// It is legal to specify a null target.
|
|
if (!aTarget) {
|
|
*aRet = nullptr;
|
|
return NS_OK;
|
|
}
|
|
|
|
AutoJSContext cx;
|
|
|
|
// Get the jsobject associated with this target
|
|
// We don't wrap here because we trust the JS engine to wrap the target
|
|
// later.
|
|
JS::Rooted<JS::Value> v(cx);
|
|
nsresult rv = nsContentUtils::WrapNative(cx, aScope, aTarget,
|
|
v.address());
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
#ifdef DEBUG
|
|
nsCOMPtr<nsISupports> targetSupp = do_QueryInterface(aTarget);
|
|
nsCOMPtr<nsISupports> native =
|
|
nsContentUtils::XPConnect()->GetNativeOfWrapper(cx,
|
|
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,
|
|
JS::Handle<JSObject*> aScope,
|
|
JS::Handle<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);
|
|
AutoPushJSContext cx(mContext);
|
|
|
|
// Get the jsobject associated with this target
|
|
JS::Rooted<JSObject*> target(cx);
|
|
JS::Rooted<JSObject*> scope(cx, aScope);
|
|
nsresult rv = JSObjectFromInterface(aTarget, scope, target.address());
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
JSAutoCompartment ac(cx, aHandler);
|
|
NS_ASSERTION(JS_TypeOfValue(cx,
|
|
OBJECT_TO_JSVAL(aHandler)) == JSTYPE_FUNCTION,
|
|
"Event handler object not a function");
|
|
}
|
|
#endif
|
|
|
|
JSAutoCompartment ac(cx, target);
|
|
|
|
JSObject* funobj;
|
|
// Make sure the handler function is parented by its event target object
|
|
if (aHandler) {
|
|
funobj = JS_CloneFunctionObject(cx, aHandler, target);
|
|
if (!funobj) {
|
|
rv = NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
} else {
|
|
funobj = NULL;
|
|
}
|
|
|
|
aBoundHandler.set(funobj);
|
|
|
|
return rv;
|
|
}
|
|
|
|
// serialization
|
|
nsresult
|
|
nsJSContext::Serialize(nsIObjectOutputStream* aStream,
|
|
JS::Handle<JSScript*> aScriptObject)
|
|
{
|
|
if (!aScriptObject)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
AutoPushJSContext cx(mContext);
|
|
return nsContentUtils::XPConnect()->WriteScript(aStream, cx,
|
|
xpc_UnmarkGrayScript(aScriptObject));
|
|
}
|
|
|
|
nsresult
|
|
nsJSContext::Deserialize(nsIObjectInputStream* aStream,
|
|
JS::MutableHandle<JSScript*> aResult)
|
|
{
|
|
AutoPushJSContext cx(mContext);
|
|
JS::Rooted<JSScript*> script(cx);
|
|
nsresult rv = nsContentUtils::XPConnect()->ReadScript(aStream, cx,
|
|
script.address());
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
aResult.set(script);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIScriptGlobalObject *
|
|
nsJSContext::GetGlobalObject()
|
|
{
|
|
AutoJSContext cx;
|
|
JS::Rooted<JSObject*> global(mContext, GetNativeGlobal());
|
|
if (!global) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (mGlobalObjectRef)
|
|
return mGlobalObjectRef;
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
JSObject *inner = JS_ObjectToInnerObject(cx, 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::GetDefaultGlobalForContext(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(JS::Handle<JSObject*> aTarget, const char* aPropName, nsISupports* aArgs)
|
|
{
|
|
uint32_t argc;
|
|
JS::Value *argv = nullptr;
|
|
|
|
nsCxPusher pusher;
|
|
pusher.Push(mContext);
|
|
|
|
Maybe<nsRootedJSValueArray> tempStorage;
|
|
|
|
JS::Rooted<JSObject*> global(mContext, GetNativeGlobal());
|
|
nsresult rv =
|
|
ConvertSupportsTojsvals(aArgs, global, &argc, &argv, tempStorage);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// got the arguments, now attach them.
|
|
|
|
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);
|
|
JS::Value vargs = OBJECT_TO_JSVAL(args);
|
|
|
|
return JS_DefineProperty(mContext, aTarget, aPropName, vargs, NULL, NULL, 0)
|
|
? NS_OK
|
|
: NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsresult
|
|
nsJSContext::ConvertSupportsTojsvals(nsISupports *aArgs,
|
|
JS::Handle<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);
|
|
AutoJSContext cx;
|
|
|
|
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((JSContext*)cx);
|
|
aTempStorage.ref().SetCapacity(cx, 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(cx, 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::Rooted<JS::Value> v(cx);
|
|
rv = nsContentUtils::WrapNative(cx, aScope, arg, v.address(),
|
|
getter_AddRefs(wrapper));
|
|
if (NS_SUCCEEDED(rv)) {
|
|
*thisval = v;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
nsCOMPtr<nsIVariant> variant = do_QueryInterface(aArgs);
|
|
if (variant) {
|
|
rv = xpc->VariantToJS(cx, 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;
|
|
|
|
AutoJSContext cx;
|
|
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;
|
|
JS::Rooted<JSObject*> global(cx, xpc_UnmarkGrayObject(GetNativeGlobal()));
|
|
JS::Rooted<JS::Value> v(cx);
|
|
nsresult rv = nsContentUtils::WrapNative(cx, global,
|
|
data, iid, v.address(),
|
|
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(JS::Handle<JSObject*> aGlobalObj)
|
|
{
|
|
nsresult rv = InitializeExternalClasses();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
JSOptionChangedCallback(js_options_dot_str, this);
|
|
AutoPushJSContext cx(mContext);
|
|
|
|
// Attempt to initialize profiling functions
|
|
::JS_DefineProfilingFunctions(cx, aGlobalObj);
|
|
|
|
#ifdef NS_TRACE_MALLOC
|
|
// Attempt to initialize TraceMalloc functions
|
|
::JS_DefineFunctions(cx, aGlobalObj, TraceMallocFunctions);
|
|
#endif
|
|
|
|
#ifdef MOZ_DMD
|
|
// Attempt to initialize DMD functions
|
|
::JS_DefineFunctions(cx, aGlobalObj, DMDFunctions);
|
|
#endif
|
|
|
|
#ifdef MOZ_JPROF
|
|
// Attempt to initialize JProf functions
|
|
::JS_DefineFunctions(cx, 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)
|
|
{
|
|
JS_MaybeGC(mContext);
|
|
|
|
if (aTerminated) {
|
|
mOperationCallbackTime = 0;
|
|
mModalStateTime = 0;
|
|
mActive = true;
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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 aManuallyTriggered)
|
|
{
|
|
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.
|
|
nsCycleCollectorResults ccResults;
|
|
nsCycleCollector_collect(aManuallyTriggered, &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 (ccResults.mMergedZones) {
|
|
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, JS::Handle<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::Rooted<JS::Value> dataArray(cx);
|
|
if (!JS_ReadUint32Pair(reader, &width, &height) ||
|
|
!JS_ReadTypedArray(reader, dataArray.address())) {
|
|
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,
|
|
JS::Handle<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();
|
|
JS::Rooted<JSObject*> dataArray(cx, 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);
|
|
|
|
Preferences::RegisterCallbackAndCall(SetMemoryGCPrefChangedCallback,
|
|
"javascript.options.mem.gc_decommit_threshold_mb",
|
|
(void *)JSGC_DECOMMIT_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;
|
|
}
|
|
|
|
// A fast-array class for JS. This class supports both nsIJSScriptArray and
|
|
// nsIArray. If it is JS itself providing and consuming this class, all work
|
|
// can be done via nsIJSScriptArray, and avoid the conversion of elements
|
|
// to/from nsISupports.
|
|
// When consumed by non-JS (eg, another script language), conversion is done
|
|
// on-the-fly.
|
|
class nsJSArgArray MOZ_FINAL : public nsIJSArgArray {
|
|
public:
|
|
nsJSArgArray(JSContext *aContext, uint32_t argc, JS::Value *argv,
|
|
nsresult *prv);
|
|
~nsJSArgArray();
|
|
// nsISupports
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsJSArgArray,
|
|
nsIJSArgArray)
|
|
|
|
// nsIArray
|
|
NS_DECL_NSIARRAY
|
|
|
|
// nsIJSArgArray
|
|
nsresult GetArgs(uint32_t *argc, void **argv);
|
|
|
|
void ReleaseJSObjects();
|
|
|
|
protected:
|
|
JSContext *mContext;
|
|
JS::Heap<JS::Value> *mArgv;
|
|
uint32_t mArgc;
|
|
};
|
|
|
|
nsJSArgArray::nsJSArgArray(JSContext *aContext, uint32_t argc, JS::Value *argv,
|
|
nsresult *prv) :
|
|
mContext(aContext),
|
|
mArgv(nullptr),
|
|
mArgc(argc)
|
|
{
|
|
// copy the array - we don't know its lifetime, and ours is tied to xpcom
|
|
// refcounting.
|
|
if (argc) {
|
|
static const fallible_t fallible = fallible_t();
|
|
mArgv = new (fallible) JS::Heap<JS::Value>[argc];
|
|
if (!mArgv) {
|
|
*prv = NS_ERROR_OUT_OF_MEMORY;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Callers are allowed to pass in a null argv even for argc > 0. They can
|
|
// then use GetArgs to initialize the values.
|
|
if (argv) {
|
|
for (uint32_t i = 0; i < argc; ++i)
|
|
mArgv[i] = argv[i];
|
|
}
|
|
|
|
if (argc > 0) {
|
|
NS_HOLD_JS_OBJECTS(this, nsJSArgArray);
|
|
}
|
|
|
|
*prv = NS_OK;
|
|
}
|
|
|
|
nsJSArgArray::~nsJSArgArray()
|
|
{
|
|
ReleaseJSObjects();
|
|
}
|
|
|
|
void
|
|
nsJSArgArray::ReleaseJSObjects()
|
|
{
|
|
if (mArgv) {
|
|
delete [] mArgv;
|
|
}
|
|
if (mArgc > 0) {
|
|
mArgc = 0;
|
|
NS_DROP_JS_OBJECTS(this, nsJSArgArray);
|
|
}
|
|
}
|
|
|
|
// QueryInterface implementation for nsJSArgArray
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsJSArgArray)
|
|
tmp->ReleaseJSObjects();
|
|
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsJSArgArray)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsJSArgArray)
|
|
if (tmp->mArgv) {
|
|
for (uint32_t i = 0; i < tmp->mArgc; ++i) {
|
|
NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mArgv[i])
|
|
}
|
|
}
|
|
NS_IMPL_CYCLE_COLLECTION_TRACE_END
|
|
|
|
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsJSArgArray)
|
|
NS_INTERFACE_MAP_ENTRY(nsIArray)
|
|
NS_INTERFACE_MAP_ENTRY(nsIJSArgArray)
|
|
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIJSArgArray)
|
|
NS_INTERFACE_MAP_END
|
|
|
|
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsJSArgArray)
|
|
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsJSArgArray)
|
|
|
|
nsresult
|
|
nsJSArgArray::GetArgs(uint32_t *argc, void **argv)
|
|
{
|
|
*argv = (void *)mArgv;
|
|
*argc = mArgc;
|
|
return NS_OK;
|
|
}
|
|
|
|
// nsIArray impl
|
|
NS_IMETHODIMP nsJSArgArray::GetLength(uint32_t *aLength)
|
|
{
|
|
*aLength = mArgc;
|
|
return NS_OK;
|
|
}
|
|
|
|
/* void queryElementAt (in unsigned long index, in nsIIDRef uuid, [iid_is (uuid), retval] out nsQIResult result); */
|
|
NS_IMETHODIMP nsJSArgArray::QueryElementAt(uint32_t index, const nsIID & uuid, void * *result)
|
|
{
|
|
*result = nullptr;
|
|
if (index >= mArgc)
|
|
return NS_ERROR_INVALID_ARG;
|
|
|
|
if (uuid.Equals(NS_GET_IID(nsIVariant)) || uuid.Equals(NS_GET_IID(nsISupports))) {
|
|
return nsContentUtils::XPConnect()->JSToVariant(mContext, mArgv[index],
|
|
(nsIVariant **)result);
|
|
}
|
|
NS_WARNING("nsJSArgArray only handles nsIVariant");
|
|
return NS_ERROR_NO_INTERFACE;
|
|
}
|
|
|
|
/* unsigned long indexOf (in unsigned long startIndex, in nsISupports element); */
|
|
NS_IMETHODIMP nsJSArgArray::IndexOf(uint32_t startIndex, nsISupports *element, uint32_t *_retval)
|
|
{
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
/* nsISimpleEnumerator enumerate (); */
|
|
NS_IMETHODIMP nsJSArgArray::Enumerate(nsISimpleEnumerator **_retval)
|
|
{
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
// The factory function
|
|
nsresult NS_CreateJSArgv(JSContext *aContext, uint32_t argc, void *argv,
|
|
nsIJSArgArray **aArray)
|
|
{
|
|
nsresult rv;
|
|
nsJSArgArray *ret = new nsJSArgArray(aContext, argc,
|
|
static_cast<JS::Value *>(argv), &rv);
|
|
if (ret == nullptr)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
if (NS_FAILED(rv)) {
|
|
delete ret;
|
|
return rv;
|
|
}
|
|
return ret->QueryInterface(NS_GET_IID(nsIArray), (void **)aArray);
|
|
}
|