зеркало из https://github.com/mozilla/gecko-dev.git
2971 строка
88 KiB
C++
2971 строка
88 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 "RuntimeService.h"
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#include "nsAutoPtr.h"
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#include "nsIChannel.h"
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#include "nsIContentSecurityPolicy.h"
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#include "nsIDocument.h"
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#include "nsIDOMChromeWindow.h"
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#include "nsIEffectiveTLDService.h"
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#include "nsIObserverService.h"
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#include "nsIPrincipal.h"
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#include "nsIScriptContext.h"
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#include "nsIScriptError.h"
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#include "nsIScriptSecurityManager.h"
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#include "nsIStreamTransportService.h"
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#include "nsISupportsPriority.h"
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#include "nsITimer.h"
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#include "nsIURI.h"
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#include "nsIXULRuntime.h"
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#include "nsPIDOMWindow.h"
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#include <algorithm>
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#include "mozilla/ipc/BackgroundChild.h"
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#include "GeckoProfiler.h"
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#include "jsfriendapi.h"
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#include "mozilla/AbstractThread.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/Atomics.h"
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#include "mozilla/CycleCollectedJSContext.h"
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#include "mozilla/CycleCollectedJSRuntime.h"
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#include "mozilla/Telemetry.h"
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#include "mozilla/TimeStamp.h"
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#include "mozilla/dom/asmjscache/AsmJSCache.h"
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#include "mozilla/dom/AtomList.h"
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#include "mozilla/dom/BindingUtils.h"
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#include "mozilla/dom/ErrorEventBinding.h"
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#include "mozilla/dom/EventTargetBinding.h"
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#include "mozilla/dom/FetchUtil.h"
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#include "mozilla/dom/MessageChannel.h"
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#include "mozilla/dom/MessageEventBinding.h"
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#include "mozilla/dom/PerformanceService.h"
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#include "mozilla/dom/WorkerBinding.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "mozilla/dom/IndexedDatabaseManager.h"
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#include "mozilla/ipc/BackgroundChild.h"
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#include "mozilla/DebugOnly.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/dom/Navigator.h"
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#include "mozilla/Monitor.h"
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#include "mozilla/StaticPrefs.h"
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#include "nsContentUtils.h"
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#include "nsCycleCollector.h"
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#include "nsDOMJSUtils.h"
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#include "nsISupportsImpl.h"
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#include "nsLayoutStatics.h"
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#include "nsNetUtil.h"
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#include "nsServiceManagerUtils.h"
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#include "nsThreadUtils.h"
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#include "nsXPCOM.h"
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#include "nsXPCOMPrivate.h"
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#include "OSFileConstants.h"
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#include "xpcpublic.h"
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#include "Principal.h"
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#include "SharedWorker.h"
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#include "WorkerDebuggerManager.h"
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#include "WorkerError.h"
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#include "WorkerLoadInfo.h"
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#include "WorkerPrivate.h"
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#include "WorkerRunnable.h"
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#include "WorkerScope.h"
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#include "WorkerThread.h"
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#include "prsystem.h"
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#define WORKERS_SHUTDOWN_TOPIC "web-workers-shutdown"
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namespace mozilla {
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using namespace ipc;
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namespace dom {
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using namespace workerinternals;
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namespace workerinternals {
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// The size of the worker runtime heaps in bytes. May be changed via pref.
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#define WORKER_DEFAULT_RUNTIME_HEAPSIZE 32 * 1024 * 1024
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// The size of the generational GC nursery for workers, in bytes.
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#define WORKER_DEFAULT_NURSERY_SIZE 1 * 1024 * 1024
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// The size of the worker JS allocation threshold in MB. May be changed via pref.
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#define WORKER_DEFAULT_ALLOCATION_THRESHOLD 30
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// Half the size of the actual C stack, to be safe.
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#define WORKER_CONTEXT_NATIVE_STACK_LIMIT 128 * sizeof(size_t) * 1024
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// The maximum number of hardware concurrency, overridable via pref.
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#define MAX_HARDWARE_CONCURRENCY 8
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// The maximum number of threads to use for workers, overridable via pref.
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#define MAX_WORKERS_PER_DOMAIN 512
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static_assert(MAX_WORKERS_PER_DOMAIN >= 1,
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"We should allow at least one worker per domain.");
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// The default number of seconds that close handlers will be allowed to run for
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// content workers.
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#define MAX_SCRIPT_RUN_TIME_SEC 10
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// The number of seconds that idle threads can hang around before being killed.
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#define IDLE_THREAD_TIMEOUT_SEC 30
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// The maximum number of threads that can be idle at one time.
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#define MAX_IDLE_THREADS 20
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#define PREF_WORKERS_PREFIX "dom.workers."
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#define PREF_WORKERS_MAX_PER_DOMAIN PREF_WORKERS_PREFIX "maxPerDomain"
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#define PREF_WORKERS_MAX_HARDWARE_CONCURRENCY "dom.maxHardwareConcurrency"
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#define PREF_MAX_SCRIPT_RUN_TIME_CONTENT "dom.max_script_run_time"
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#define PREF_MAX_SCRIPT_RUN_TIME_CHROME "dom.max_chrome_script_run_time"
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#define GC_REQUEST_OBSERVER_TOPIC "child-gc-request"
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#define CC_REQUEST_OBSERVER_TOPIC "child-cc-request"
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#define MEMORY_PRESSURE_OBSERVER_TOPIC "memory-pressure"
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#define BROADCAST_ALL_WORKERS(_func, ...) \
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PR_BEGIN_MACRO \
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AssertIsOnMainThread(); \
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\
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AutoTArray<WorkerPrivate*, 100> workers; \
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{ \
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MutexAutoLock lock(mMutex); \
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\
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AddAllTopLevelWorkersToArray(workers); \
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} \
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\
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if (!workers.IsEmpty()) { \
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for (uint32_t index = 0; index < workers.Length(); index++) { \
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workers[index]-> _func (__VA_ARGS__); \
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} \
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} \
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PR_END_MACRO
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// Prefixes for observing preference changes.
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#define PREF_JS_OPTIONS_PREFIX "javascript.options."
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#define PREF_WORKERS_OPTIONS_PREFIX PREF_WORKERS_PREFIX "options."
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#define PREF_MEM_OPTIONS_PREFIX "mem."
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#define PREF_GCZEAL "gcZeal"
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static NS_DEFINE_CID(kStreamTransportServiceCID, NS_STREAMTRANSPORTSERVICE_CID);
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namespace {
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const uint32_t kNoIndex = uint32_t(-1);
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uint32_t gMaxWorkersPerDomain = MAX_WORKERS_PER_DOMAIN;
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uint32_t gMaxHardwareConcurrency = MAX_HARDWARE_CONCURRENCY;
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// Does not hold an owning reference.
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RuntimeService* gRuntimeService = nullptr;
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// Only true during the call to Init.
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bool gRuntimeServiceDuringInit = false;
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class LiteralRebindingCString : public nsDependentCString
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{
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public:
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template<int N>
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void RebindLiteral(const char (&aStr)[N])
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{
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Rebind(aStr, N-1);
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}
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};
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template <typename T>
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struct PrefTraits;
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template <>
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struct PrefTraits<bool>
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{
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typedef bool PrefValueType;
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static const PrefValueType kDefaultValue = false;
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static inline PrefValueType
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Get(const char* aPref)
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{
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AssertIsOnMainThread();
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return Preferences::GetBool(aPref);
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}
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static inline bool
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Exists(const char* aPref)
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{
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AssertIsOnMainThread();
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return Preferences::GetType(aPref) == nsIPrefBranch::PREF_BOOL;
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}
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};
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template <>
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struct PrefTraits<int32_t>
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{
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typedef int32_t PrefValueType;
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static inline PrefValueType
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Get(const char* aPref)
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{
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AssertIsOnMainThread();
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return Preferences::GetInt(aPref);
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}
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static inline bool
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Exists(const char* aPref)
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{
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AssertIsOnMainThread();
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return Preferences::GetType(aPref) == nsIPrefBranch::PREF_INT;
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}
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};
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template <typename T>
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T
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GetWorkerPref(const nsACString& aPref,
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const T aDefault = PrefTraits<T>::kDefaultValue)
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{
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AssertIsOnMainThread();
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typedef PrefTraits<T> PrefHelper;
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T result;
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nsAutoCString prefName;
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prefName.AssignLiteral(PREF_WORKERS_OPTIONS_PREFIX);
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prefName.Append(aPref);
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if (PrefHelper::Exists(prefName.get())) {
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result = PrefHelper::Get(prefName.get());
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}
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else {
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prefName.AssignLiteral(PREF_JS_OPTIONS_PREFIX);
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prefName.Append(aPref);
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if (PrefHelper::Exists(prefName.get())) {
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result = PrefHelper::Get(prefName.get());
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}
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else {
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result = aDefault;
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}
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}
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return result;
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}
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void
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LoadContextOptions(const char* aPrefName, void* /* aClosure */)
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{
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AssertIsOnMainThread();
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RuntimeService* rts = RuntimeService::GetService();
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if (!rts) {
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// May be shutting down, just bail.
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return;
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}
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const nsDependentCString prefName(aPrefName);
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// Several other pref branches will get included here so bail out if there is
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// another callback that will handle this change.
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if (StringBeginsWith(prefName,
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NS_LITERAL_CSTRING(PREF_JS_OPTIONS_PREFIX
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PREF_MEM_OPTIONS_PREFIX)) ||
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StringBeginsWith(prefName,
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NS_LITERAL_CSTRING(PREF_WORKERS_OPTIONS_PREFIX
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PREF_MEM_OPTIONS_PREFIX))) {
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return;
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}
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#ifdef JS_GC_ZEAL
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if (prefName.EqualsLiteral(PREF_JS_OPTIONS_PREFIX PREF_GCZEAL) ||
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prefName.EqualsLiteral(PREF_WORKERS_OPTIONS_PREFIX PREF_GCZEAL)) {
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return;
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}
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#endif
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// Context options.
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JS::ContextOptions contextOptions;
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contextOptions.setAsmJS(GetWorkerPref<bool>(NS_LITERAL_CSTRING("asmjs")))
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.setWasm(GetWorkerPref<bool>(NS_LITERAL_CSTRING("wasm")))
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.setWasmBaseline(GetWorkerPref<bool>(NS_LITERAL_CSTRING("wasm_baselinejit")))
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.setWasmIon(GetWorkerPref<bool>(NS_LITERAL_CSTRING("wasm_ionjit")))
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#ifdef ENABLE_WASM_GC
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.setWasmGc(GetWorkerPref<bool>(NS_LITERAL_CSTRING("wasm_gc")))
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#endif
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.setThrowOnAsmJSValidationFailure(GetWorkerPref<bool>(
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NS_LITERAL_CSTRING("throw_on_asmjs_validation_failure")))
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.setBaseline(GetWorkerPref<bool>(NS_LITERAL_CSTRING("baselinejit")))
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.setIon(GetWorkerPref<bool>(NS_LITERAL_CSTRING("ion")))
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.setNativeRegExp(GetWorkerPref<bool>(NS_LITERAL_CSTRING("native_regexp")))
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.setAsyncStack(GetWorkerPref<bool>(NS_LITERAL_CSTRING("asyncstack")))
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.setWerror(GetWorkerPref<bool>(NS_LITERAL_CSTRING("werror")))
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#ifdef FUZZING
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.setFuzzing(GetWorkerPref<bool>(NS_LITERAL_CSTRING("fuzzing.enabled")))
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#endif
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.setStreams(GetWorkerPref<bool>(NS_LITERAL_CSTRING("streams")))
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.setExtraWarnings(GetWorkerPref<bool>(NS_LITERAL_CSTRING("strict")));
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nsCOMPtr<nsIXULRuntime> xr = do_GetService("@mozilla.org/xre/runtime;1");
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if (xr) {
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bool safeMode = false;
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xr->GetInSafeMode(&safeMode);
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if (safeMode) {
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contextOptions.disableOptionsForSafeMode();
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}
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}
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RuntimeService::SetDefaultContextOptions(contextOptions);
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if (rts) {
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rts->UpdateAllWorkerContextOptions();
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}
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}
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#ifdef JS_GC_ZEAL
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void
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LoadGCZealOptions(const char* /* aPrefName */, void* /* aClosure */)
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{
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AssertIsOnMainThread();
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RuntimeService* rts = RuntimeService::GetService();
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if (!rts) {
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// May be shutting down, just bail.
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return;
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}
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int32_t gczeal = GetWorkerPref<int32_t>(NS_LITERAL_CSTRING(PREF_GCZEAL), -1);
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if (gczeal < 0) {
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gczeal = 0;
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}
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int32_t frequency =
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GetWorkerPref<int32_t>(NS_LITERAL_CSTRING("gcZeal.frequency"), -1);
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if (frequency < 0) {
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frequency = JS_DEFAULT_ZEAL_FREQ;
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}
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RuntimeService::SetDefaultGCZeal(uint8_t(gczeal), uint32_t(frequency));
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if (rts) {
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rts->UpdateAllWorkerGCZeal();
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}
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}
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#endif
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void
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UpdateCommonJSGCMemoryOption(RuntimeService* aRuntimeService,
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const nsACString& aPrefName, JSGCParamKey aKey)
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{
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AssertIsOnMainThread();
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NS_ASSERTION(!aPrefName.IsEmpty(), "Empty pref name!");
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int32_t prefValue = GetWorkerPref(aPrefName, -1);
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uint32_t value =
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(prefValue < 0 || prefValue >= 10000) ? 0 : uint32_t(prefValue);
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RuntimeService::SetDefaultJSGCSettings(aKey, value);
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if (aRuntimeService) {
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aRuntimeService->UpdateAllWorkerMemoryParameter(aKey, value);
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}
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}
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void
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UpdateOtherJSGCMemoryOption(RuntimeService* aRuntimeService,
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JSGCParamKey aKey, uint32_t aValue)
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{
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AssertIsOnMainThread();
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RuntimeService::SetDefaultJSGCSettings(aKey, aValue);
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if (aRuntimeService) {
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aRuntimeService->UpdateAllWorkerMemoryParameter(aKey, aValue);
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}
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}
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void
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LoadJSGCMemoryOptions(const char* aPrefName, void* /* aClosure */)
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{
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AssertIsOnMainThread();
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RuntimeService* rts = RuntimeService::GetService();
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if (!rts) {
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// May be shutting down, just bail.
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return;
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}
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NS_NAMED_LITERAL_CSTRING(jsPrefix, PREF_JS_OPTIONS_PREFIX);
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NS_NAMED_LITERAL_CSTRING(workersPrefix, PREF_WORKERS_OPTIONS_PREFIX);
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const nsDependentCString fullPrefName(aPrefName);
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// Pull out the string that actually distinguishes the parameter we need to
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// change.
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nsDependentCSubstring memPrefName;
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if (StringBeginsWith(fullPrefName, jsPrefix)) {
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memPrefName.Rebind(fullPrefName, jsPrefix.Length());
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}
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else if (StringBeginsWith(fullPrefName, workersPrefix)) {
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memPrefName.Rebind(fullPrefName, workersPrefix.Length());
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}
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else {
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NS_ERROR("Unknown pref name!");
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return;
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}
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#ifdef DEBUG
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// During Init() we get called back with a branch string here, so there should
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// be no just a "mem." pref here.
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if (!rts) {
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NS_ASSERTION(memPrefName.EqualsLiteral(PREF_MEM_OPTIONS_PREFIX), "Huh?!");
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}
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#endif
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// If we're running in Init() then do this for every pref we care about.
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// Otherwise we just want to update the parameter that changed.
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for (uint32_t index = !gRuntimeServiceDuringInit
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? JSSettings::kGCSettingsArraySize - 1 : 0;
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index < JSSettings::kGCSettingsArraySize;
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index++) {
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LiteralRebindingCString matchName;
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matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "max");
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if (memPrefName == matchName || (gRuntimeServiceDuringInit && index == 0)) {
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int32_t prefValue = GetWorkerPref(matchName, -1);
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uint32_t value = (prefValue <= 0 || prefValue >= 0x1000) ?
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uint32_t(-1) :
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uint32_t(prefValue) * 1024 * 1024;
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UpdateOtherJSGCMemoryOption(rts, JSGC_MAX_BYTES, value);
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continue;
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}
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matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "high_water_mark");
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if (memPrefName == matchName || (gRuntimeServiceDuringInit && index == 1)) {
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int32_t prefValue = GetWorkerPref(matchName, 128);
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UpdateOtherJSGCMemoryOption(rts, JSGC_MAX_MALLOC_BYTES,
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uint32_t(prefValue) * 1024 * 1024);
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continue;
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}
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matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
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"gc_high_frequency_time_limit_ms");
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if (memPrefName == matchName || (gRuntimeServiceDuringInit && index == 2)) {
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UpdateCommonJSGCMemoryOption(rts, matchName,
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JSGC_HIGH_FREQUENCY_TIME_LIMIT);
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continue;
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}
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matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
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"gc_low_frequency_heap_growth");
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if (memPrefName == matchName || (gRuntimeServiceDuringInit && index == 3)) {
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UpdateCommonJSGCMemoryOption(rts, matchName,
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JSGC_LOW_FREQUENCY_HEAP_GROWTH);
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continue;
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}
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matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
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"gc_high_frequency_heap_growth_min");
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if (memPrefName == matchName || (gRuntimeServiceDuringInit && index == 4)) {
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UpdateCommonJSGCMemoryOption(rts, matchName,
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JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN);
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continue;
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}
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matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
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"gc_high_frequency_heap_growth_max");
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if (memPrefName == matchName || (gRuntimeServiceDuringInit && index == 5)) {
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UpdateCommonJSGCMemoryOption(rts, matchName,
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JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX);
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continue;
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}
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matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
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"gc_high_frequency_low_limit_mb");
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if (memPrefName == matchName || (gRuntimeServiceDuringInit && index == 6)) {
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UpdateCommonJSGCMemoryOption(rts, matchName,
|
|
JSGC_HIGH_FREQUENCY_LOW_LIMIT);
|
|
continue;
|
|
}
|
|
|
|
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
|
|
"gc_high_frequency_high_limit_mb");
|
|
if (memPrefName == matchName || (gRuntimeServiceDuringInit && index == 7)) {
|
|
UpdateCommonJSGCMemoryOption(rts, matchName,
|
|
JSGC_HIGH_FREQUENCY_HIGH_LIMIT);
|
|
continue;
|
|
}
|
|
|
|
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
|
|
"gc_allocation_threshold_mb");
|
|
if (memPrefName == matchName || (gRuntimeServiceDuringInit && index == 8)) {
|
|
UpdateCommonJSGCMemoryOption(rts, matchName, JSGC_ALLOCATION_THRESHOLD);
|
|
continue;
|
|
}
|
|
|
|
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "gc_incremental_slice_ms");
|
|
if (memPrefName == matchName || (gRuntimeServiceDuringInit && index == 9)) {
|
|
int32_t prefValue = GetWorkerPref(matchName, -1);
|
|
uint32_t value =
|
|
(prefValue <= 0 || prefValue >= 100000) ? 0 : uint32_t(prefValue);
|
|
UpdateOtherJSGCMemoryOption(rts, JSGC_SLICE_TIME_BUDGET, value);
|
|
continue;
|
|
}
|
|
|
|
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "gc_dynamic_heap_growth");
|
|
if (memPrefName == matchName ||
|
|
(gRuntimeServiceDuringInit && index == 10)) {
|
|
bool prefValue = GetWorkerPref(matchName, false);
|
|
UpdateOtherJSGCMemoryOption(rts, JSGC_DYNAMIC_HEAP_GROWTH,
|
|
prefValue ? 0 : 1);
|
|
continue;
|
|
}
|
|
|
|
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "gc_dynamic_mark_slice");
|
|
if (memPrefName == matchName ||
|
|
(gRuntimeServiceDuringInit && index == 11)) {
|
|
bool prefValue = GetWorkerPref(matchName, false);
|
|
UpdateOtherJSGCMemoryOption(rts, JSGC_DYNAMIC_MARK_SLICE,
|
|
prefValue ? 0 : 1);
|
|
continue;
|
|
}
|
|
|
|
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "gc_min_empty_chunk_count");
|
|
if (memPrefName == matchName ||
|
|
(gRuntimeServiceDuringInit && index == 12)) {
|
|
UpdateCommonJSGCMemoryOption(rts, matchName, JSGC_MIN_EMPTY_CHUNK_COUNT);
|
|
continue;
|
|
}
|
|
|
|
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "gc_max_empty_chunk_count");
|
|
if (memPrefName == matchName ||
|
|
(gRuntimeServiceDuringInit && index == 13)) {
|
|
UpdateCommonJSGCMemoryOption(rts, matchName, JSGC_MAX_EMPTY_CHUNK_COUNT);
|
|
continue;
|
|
}
|
|
|
|
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "gc_compacting");
|
|
if (memPrefName == matchName ||
|
|
(gRuntimeServiceDuringInit && index == 14)) {
|
|
bool prefValue = GetWorkerPref(matchName, false);
|
|
UpdateOtherJSGCMemoryOption(rts, JSGC_COMPACTING_ENABLED,
|
|
prefValue ? 0 : 1);
|
|
continue;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
nsAutoCString message("Workers don't support the 'mem.");
|
|
message.Append(memPrefName);
|
|
message.AppendLiteral("' preference!");
|
|
NS_WARNING(message.get());
|
|
#endif
|
|
}
|
|
}
|
|
|
|
bool
|
|
InterruptCallback(JSContext* aCx)
|
|
{
|
|
WorkerPrivate* worker = GetWorkerPrivateFromContext(aCx);
|
|
MOZ_ASSERT(worker);
|
|
|
|
// As with the main thread, the interrupt callback is triggered
|
|
// non-deterministically when recording/replaying, so return early to avoid
|
|
// performing any recorded events.
|
|
if (recordreplay::IsRecordingOrReplaying()) {
|
|
return true;
|
|
}
|
|
|
|
// Now is a good time to turn on profiling if it's pending.
|
|
PROFILER_JS_INTERRUPT_CALLBACK();
|
|
|
|
return worker->InterruptCallback(aCx);
|
|
}
|
|
|
|
class LogViolationDetailsRunnable final : public WorkerMainThreadRunnable
|
|
{
|
|
nsString mFileName;
|
|
uint32_t mLineNum;
|
|
uint32_t mColumnNum;
|
|
nsString mScriptSample;
|
|
|
|
public:
|
|
LogViolationDetailsRunnable(WorkerPrivate* aWorker,
|
|
const nsString& aFileName,
|
|
uint32_t aLineNum,
|
|
uint32_t aColumnNum,
|
|
const nsAString& aScriptSample)
|
|
: WorkerMainThreadRunnable(aWorker,
|
|
NS_LITERAL_CSTRING("RuntimeService :: LogViolationDetails"))
|
|
, mFileName(aFileName)
|
|
, mLineNum(aLineNum)
|
|
, mColumnNum(aColumnNum)
|
|
, mScriptSample(aScriptSample)
|
|
{
|
|
MOZ_ASSERT(aWorker);
|
|
}
|
|
|
|
virtual bool MainThreadRun() override;
|
|
|
|
private:
|
|
~LogViolationDetailsRunnable() {}
|
|
};
|
|
|
|
bool
|
|
ContentSecurityPolicyAllows(JSContext* aCx, JS::HandleValue aValue)
|
|
{
|
|
WorkerPrivate* worker = GetWorkerPrivateFromContext(aCx);
|
|
worker->AssertIsOnWorkerThread();
|
|
|
|
if (worker->GetReportCSPViolations()) {
|
|
JS::Rooted<JSString*> jsString(aCx, JS::ToString(aCx, aValue));
|
|
if (NS_WARN_IF(!jsString)) {
|
|
JS_ClearPendingException(aCx);
|
|
return false;
|
|
}
|
|
|
|
nsAutoJSString scriptSample;
|
|
if (NS_WARN_IF(!scriptSample.init(aCx, jsString))) {
|
|
JS_ClearPendingException(aCx);
|
|
return false;
|
|
}
|
|
|
|
nsString fileName;
|
|
uint32_t lineNum = 0;
|
|
uint32_t columnNum = 0;
|
|
|
|
JS::AutoFilename file;
|
|
if (JS::DescribeScriptedCaller(aCx, &file, &lineNum, &columnNum) && file.get()) {
|
|
fileName = NS_ConvertUTF8toUTF16(file.get());
|
|
} else {
|
|
MOZ_ASSERT(!JS_IsExceptionPending(aCx));
|
|
}
|
|
|
|
RefPtr<LogViolationDetailsRunnable> runnable =
|
|
new LogViolationDetailsRunnable(worker, fileName, lineNum, columnNum,
|
|
scriptSample);
|
|
|
|
ErrorResult rv;
|
|
runnable->Dispatch(Killing, rv);
|
|
if (NS_WARN_IF(rv.Failed())) {
|
|
rv.SuppressException();
|
|
}
|
|
}
|
|
|
|
return worker->IsEvalAllowed();
|
|
}
|
|
|
|
void
|
|
CTypesActivityCallback(JSContext* aCx,
|
|
js::CTypesActivityType aType)
|
|
{
|
|
WorkerPrivate* worker = GetWorkerPrivateFromContext(aCx);
|
|
worker->AssertIsOnWorkerThread();
|
|
|
|
switch (aType) {
|
|
case js::CTYPES_CALL_BEGIN:
|
|
worker->BeginCTypesCall();
|
|
break;
|
|
|
|
case js::CTYPES_CALL_END:
|
|
worker->EndCTypesCall();
|
|
break;
|
|
|
|
case js::CTYPES_CALLBACK_BEGIN:
|
|
worker->BeginCTypesCallback();
|
|
break;
|
|
|
|
case js::CTYPES_CALLBACK_END:
|
|
worker->EndCTypesCallback();
|
|
break;
|
|
|
|
default:
|
|
MOZ_CRASH("Unknown type flag!");
|
|
}
|
|
}
|
|
|
|
static nsIPrincipal*
|
|
GetPrincipalForAsmJSCacheOp()
|
|
{
|
|
WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
|
|
if (!workerPrivate) {
|
|
return nullptr;
|
|
}
|
|
|
|
// asmjscache::OpenEntryForX guarnatee to only access the given nsIPrincipal
|
|
// from the main thread.
|
|
return workerPrivate->GetPrincipalDontAssertMainThread();
|
|
}
|
|
|
|
static bool
|
|
AsmJSCacheOpenEntryForRead(JS::Handle<JSObject*> aGlobal,
|
|
const char16_t* aBegin,
|
|
const char16_t* aLimit,
|
|
size_t* aSize,
|
|
const uint8_t** aMemory,
|
|
intptr_t *aHandle)
|
|
{
|
|
nsIPrincipal* principal = GetPrincipalForAsmJSCacheOp();
|
|
if (!principal) {
|
|
return false;
|
|
}
|
|
|
|
return asmjscache::OpenEntryForRead(principal, aBegin, aLimit, aSize, aMemory,
|
|
aHandle);
|
|
}
|
|
|
|
static JS::AsmJSCacheResult
|
|
AsmJSCacheOpenEntryForWrite(JS::Handle<JSObject*> aGlobal,
|
|
const char16_t* aBegin,
|
|
const char16_t* aEnd,
|
|
size_t aSize,
|
|
uint8_t** aMemory,
|
|
intptr_t* aHandle)
|
|
{
|
|
nsIPrincipal* principal = GetPrincipalForAsmJSCacheOp();
|
|
if (!principal) {
|
|
return JS::AsmJSCache_InternalError;
|
|
}
|
|
|
|
return asmjscache::OpenEntryForWrite(principal, aBegin, aEnd, aSize, aMemory,
|
|
aHandle);
|
|
}
|
|
|
|
// JSDispatchableRunnables are WorkerRunnables used to dispatch JS::Dispatchable
|
|
// back to their worker thread. A WorkerRunnable is used for two reasons:
|
|
//
|
|
// 1. The JS::Dispatchable::run() callback may run JS so we cannot use a control
|
|
// runnable since they use async interrupts and break JS run-to-completion.
|
|
//
|
|
// 2. The DispatchToEventLoopCallback interface is *required* to fail during
|
|
// shutdown (see jsapi.h) which is exactly what WorkerRunnable::Dispatch() will
|
|
// do. Moreover, JS_DestroyContext() does *not* block on JS::Dispatchable::run
|
|
// being called, DispatchToEventLoopCallback failure is expected to happen
|
|
// during shutdown.
|
|
class JSDispatchableRunnable final : public WorkerRunnable
|
|
{
|
|
JS::Dispatchable* mDispatchable;
|
|
|
|
~JSDispatchableRunnable()
|
|
{
|
|
MOZ_ASSERT(!mDispatchable);
|
|
}
|
|
|
|
// Disable the usual pre/post-dispatch thread assertions since we are
|
|
// dispatching from some random JS engine internal thread:
|
|
|
|
bool PreDispatch(WorkerPrivate* aWorkerPrivate) override
|
|
{
|
|
return true;
|
|
}
|
|
|
|
void PostDispatch(WorkerPrivate* aWorkerPrivate, bool aDispatchResult) override
|
|
{
|
|
// For the benefit of the destructor assert.
|
|
if (!aDispatchResult) {
|
|
mDispatchable = nullptr;
|
|
}
|
|
}
|
|
|
|
public:
|
|
JSDispatchableRunnable(WorkerPrivate* aWorkerPrivate,
|
|
JS::Dispatchable* aDispatchable)
|
|
: WorkerRunnable(aWorkerPrivate,
|
|
WorkerRunnable::WorkerThreadUnchangedBusyCount)
|
|
, mDispatchable(aDispatchable)
|
|
{
|
|
MOZ_ASSERT(mDispatchable);
|
|
}
|
|
|
|
bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
|
|
{
|
|
MOZ_ASSERT(aWorkerPrivate == mWorkerPrivate);
|
|
MOZ_ASSERT(aCx == mWorkerPrivate->GetJSContext());
|
|
MOZ_ASSERT(mDispatchable);
|
|
|
|
AutoJSAPI jsapi;
|
|
jsapi.Init();
|
|
|
|
mDispatchable->run(mWorkerPrivate->GetJSContext(),
|
|
JS::Dispatchable::NotShuttingDown);
|
|
mDispatchable = nullptr; // mDispatchable may delete itself
|
|
|
|
return true;
|
|
}
|
|
|
|
nsresult Cancel() override
|
|
{
|
|
MOZ_ASSERT(mDispatchable);
|
|
|
|
AutoJSAPI jsapi;
|
|
jsapi.Init();
|
|
|
|
mDispatchable->run(mWorkerPrivate->GetJSContext(),
|
|
JS::Dispatchable::ShuttingDown);
|
|
mDispatchable = nullptr; // mDispatchable may delete itself
|
|
|
|
return WorkerRunnable::Cancel();
|
|
}
|
|
};
|
|
|
|
static bool
|
|
DispatchToEventLoop(void* aClosure, JS::Dispatchable* aDispatchable)
|
|
{
|
|
// This callback may execute either on the worker thread or a random
|
|
// JS-internal helper thread.
|
|
|
|
// See comment at JS::InitDispatchToEventLoop() below for how we know the
|
|
// WorkerPrivate is alive.
|
|
WorkerPrivate* workerPrivate = reinterpret_cast<WorkerPrivate*>(aClosure);
|
|
|
|
// Dispatch is expected to fail during shutdown for the reasons outlined in
|
|
// the JSDispatchableRunnable comment above.
|
|
RefPtr<JSDispatchableRunnable> r =
|
|
new JSDispatchableRunnable(workerPrivate, aDispatchable);
|
|
return r->Dispatch();
|
|
}
|
|
|
|
static bool
|
|
ConsumeStream(JSContext* aCx,
|
|
JS::HandleObject aObj,
|
|
JS::MimeType aMimeType,
|
|
JS::StreamConsumer* aConsumer)
|
|
{
|
|
WorkerPrivate* worker = GetWorkerPrivateFromContext(aCx);
|
|
if (!worker) {
|
|
JS_ReportErrorNumberASCII(aCx, js::GetErrorMessage, nullptr,
|
|
JSMSG_ERROR_CONSUMING_RESPONSE);
|
|
return false;
|
|
}
|
|
|
|
return FetchUtil::StreamResponseToJS(aCx, aObj, aMimeType, aConsumer, worker);
|
|
}
|
|
|
|
bool
|
|
InitJSContextForWorker(WorkerPrivate* aWorkerPrivate, JSContext* aWorkerCx)
|
|
{
|
|
aWorkerPrivate->AssertIsOnWorkerThread();
|
|
NS_ASSERTION(!aWorkerPrivate->GetJSContext(), "Already has a context!");
|
|
|
|
JSSettings settings;
|
|
aWorkerPrivate->CopyJSSettings(settings);
|
|
|
|
JS::ContextOptionsRef(aWorkerCx) = settings.contextOptions;
|
|
|
|
JSSettings::JSGCSettingsArray& gcSettings = settings.gcSettings;
|
|
|
|
// This is the real place where we set the max memory for the runtime.
|
|
for (uint32_t index = 0; index < ArrayLength(gcSettings); index++) {
|
|
const JSSettings::JSGCSetting& setting = gcSettings[index];
|
|
if (setting.key.isSome()) {
|
|
NS_ASSERTION(setting.value, "Can't handle 0 values!");
|
|
JS_SetGCParameter(aWorkerCx, *setting.key, setting.value);
|
|
}
|
|
}
|
|
|
|
JS_SetNativeStackQuota(aWorkerCx, WORKER_CONTEXT_NATIVE_STACK_LIMIT);
|
|
|
|
// Security policy:
|
|
static const JSSecurityCallbacks securityCallbacks = {
|
|
ContentSecurityPolicyAllows
|
|
};
|
|
JS_SetSecurityCallbacks(aWorkerCx, &securityCallbacks);
|
|
|
|
// Set up the asm.js cache callbacks
|
|
static const JS::AsmJSCacheOps asmJSCacheOps = {
|
|
AsmJSCacheOpenEntryForRead,
|
|
asmjscache::CloseEntryForRead,
|
|
AsmJSCacheOpenEntryForWrite,
|
|
asmjscache::CloseEntryForWrite
|
|
};
|
|
JS::SetAsmJSCacheOps(aWorkerCx, &asmJSCacheOps);
|
|
|
|
// A WorkerPrivate lives strictly longer than its JSRuntime so we can safely
|
|
// store a raw pointer as the callback's closure argument on the JSRuntime.
|
|
JS::InitDispatchToEventLoop(aWorkerCx, DispatchToEventLoop, (void*)aWorkerPrivate);
|
|
|
|
JS::InitConsumeStreamCallback(aWorkerCx, ConsumeStream);
|
|
|
|
if (!JS::InitSelfHostedCode(aWorkerCx)) {
|
|
NS_WARNING("Could not init self-hosted code!");
|
|
return false;
|
|
}
|
|
|
|
JS_AddInterruptCallback(aWorkerCx, InterruptCallback);
|
|
|
|
js::SetCTypesActivityCallback(aWorkerCx, CTypesActivityCallback);
|
|
|
|
#ifdef JS_GC_ZEAL
|
|
JS_SetGCZeal(aWorkerCx, settings.gcZeal, settings.gcZealFrequency);
|
|
#endif
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
PreserveWrapper(JSContext *cx, JSObject *obj)
|
|
{
|
|
MOZ_ASSERT(cx);
|
|
MOZ_ASSERT(obj);
|
|
MOZ_ASSERT(mozilla::dom::IsDOMObject(obj));
|
|
|
|
return mozilla::dom::TryPreserveWrapper(obj);
|
|
}
|
|
|
|
JSObject*
|
|
Wrap(JSContext *cx, JS::HandleObject existing, JS::HandleObject obj)
|
|
{
|
|
JSObject* targetGlobal = JS::CurrentGlobalOrNull(cx);
|
|
if (!IsWorkerDebuggerGlobal(targetGlobal) &&
|
|
!IsWorkerDebuggerSandbox(targetGlobal)) {
|
|
MOZ_CRASH("There should be no edges from the debuggee to the debugger.");
|
|
}
|
|
|
|
// Note: the JS engine unwraps CCWs before calling this callback.
|
|
JSObject* originGlobal = JS::GetNonCCWObjectGlobal(obj);
|
|
|
|
const js::Wrapper* wrapper = nullptr;
|
|
if (IsWorkerDebuggerGlobal(originGlobal) ||
|
|
IsWorkerDebuggerSandbox(originGlobal)) {
|
|
wrapper = &js::CrossCompartmentWrapper::singleton;
|
|
} else {
|
|
wrapper = &js::OpaqueCrossCompartmentWrapper::singleton;
|
|
}
|
|
|
|
if (existing) {
|
|
js::Wrapper::Renew(existing, obj, wrapper);
|
|
}
|
|
return js::Wrapper::New(cx, obj, wrapper);
|
|
}
|
|
|
|
static const JSWrapObjectCallbacks WrapObjectCallbacks = {
|
|
Wrap,
|
|
nullptr,
|
|
};
|
|
|
|
class WorkerJSRuntime final : public mozilla::CycleCollectedJSRuntime
|
|
{
|
|
public:
|
|
// The heap size passed here doesn't matter, we will change it later in the
|
|
// call to JS_SetGCParameter inside InitJSContextForWorker.
|
|
explicit WorkerJSRuntime(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
|
|
: CycleCollectedJSRuntime(aCx)
|
|
, mWorkerPrivate(aWorkerPrivate)
|
|
{
|
|
MOZ_COUNT_CTOR_INHERITED(WorkerJSRuntime, CycleCollectedJSRuntime);
|
|
MOZ_ASSERT(aWorkerPrivate);
|
|
|
|
{
|
|
JS::UniqueChars defaultLocale = aWorkerPrivate->AdoptDefaultLocale();
|
|
MOZ_ASSERT(defaultLocale,
|
|
"failure of a WorkerPrivate to have a default locale should "
|
|
"have made the worker fail to spawn");
|
|
|
|
if (!JS_SetDefaultLocale(Runtime(), defaultLocale.get())) {
|
|
NS_WARNING("failed to set workerCx's default locale");
|
|
}
|
|
}
|
|
}
|
|
|
|
void Shutdown(JSContext* cx) override
|
|
{
|
|
// The CC is shut down, and the superclass destructor will GC, so make sure
|
|
// we don't try to CC again.
|
|
mWorkerPrivate = nullptr;
|
|
|
|
CycleCollectedJSRuntime::Shutdown(cx);
|
|
}
|
|
|
|
~WorkerJSRuntime()
|
|
{
|
|
MOZ_COUNT_DTOR_INHERITED(WorkerJSRuntime, CycleCollectedJSRuntime);
|
|
}
|
|
|
|
virtual void
|
|
PrepareForForgetSkippable() override
|
|
{
|
|
}
|
|
|
|
virtual void
|
|
BeginCycleCollectionCallback() override
|
|
{
|
|
}
|
|
|
|
virtual void
|
|
EndCycleCollectionCallback(CycleCollectorResults &aResults) override
|
|
{
|
|
}
|
|
|
|
void
|
|
DispatchDeferredDeletion(bool aContinuation, bool aPurge) override
|
|
{
|
|
MOZ_ASSERT(!aContinuation);
|
|
|
|
// Do it immediately, no need for asynchronous behavior here.
|
|
nsCycleCollector_doDeferredDeletion();
|
|
}
|
|
|
|
virtual void CustomGCCallback(JSGCStatus aStatus) override
|
|
{
|
|
if (!mWorkerPrivate) {
|
|
// We're shutting down, no need to do anything.
|
|
return;
|
|
}
|
|
|
|
mWorkerPrivate->AssertIsOnWorkerThread();
|
|
|
|
if (aStatus == JSGC_END) {
|
|
nsCycleCollector_collect(nullptr);
|
|
}
|
|
}
|
|
|
|
private:
|
|
WorkerPrivate* mWorkerPrivate;
|
|
};
|
|
|
|
} // anonymous namespace
|
|
|
|
} // workerinternals namespace
|
|
|
|
class WorkerJSContext final : public mozilla::CycleCollectedJSContext
|
|
{
|
|
public:
|
|
// The heap size passed here doesn't matter, we will change it later in the
|
|
// call to JS_SetGCParameter inside InitJSContextForWorker.
|
|
explicit WorkerJSContext(WorkerPrivate* aWorkerPrivate)
|
|
: mWorkerPrivate(aWorkerPrivate)
|
|
{
|
|
MOZ_COUNT_CTOR_INHERITED(WorkerJSContext, CycleCollectedJSContext);
|
|
MOZ_ASSERT(aWorkerPrivate);
|
|
// Magical number 2. Workers have the base recursion depth 1, and normal
|
|
// runnables run at level 2, and we don't want to process microtasks
|
|
// at any other level.
|
|
SetTargetedMicroTaskRecursionDepth(2);
|
|
}
|
|
|
|
~WorkerJSContext()
|
|
{
|
|
MOZ_COUNT_DTOR_INHERITED(WorkerJSContext, CycleCollectedJSContext);
|
|
JSContext* cx = MaybeContext();
|
|
if (!cx) {
|
|
return; // Initialize() must have failed
|
|
}
|
|
|
|
// The worker global should be unrooted and the shutdown cycle collection
|
|
// should break all remaining cycles. The superclass destructor will run
|
|
// the GC one final time and finalize any JSObjects that were participating
|
|
// in cycles that were broken during CC shutdown.
|
|
nsCycleCollector_shutdown();
|
|
|
|
// The CC is shut down, and the superclass destructor will GC, so make sure
|
|
// we don't try to CC again.
|
|
mWorkerPrivate = nullptr;
|
|
}
|
|
|
|
WorkerJSContext* GetAsWorkerJSContext() override { return this; }
|
|
|
|
CycleCollectedJSRuntime* CreateRuntime(JSContext* aCx) override
|
|
{
|
|
return new WorkerJSRuntime(aCx, mWorkerPrivate);
|
|
}
|
|
|
|
nsresult Initialize(JSRuntime* aParentRuntime)
|
|
{
|
|
nsresult rv =
|
|
CycleCollectedJSContext::Initialize(aParentRuntime,
|
|
WORKER_DEFAULT_RUNTIME_HEAPSIZE,
|
|
WORKER_DEFAULT_NURSERY_SIZE);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
JSContext* cx = Context();
|
|
|
|
js::SetPreserveWrapperCallback(cx, PreserveWrapper);
|
|
JS_InitDestroyPrincipalsCallback(cx, DestroyWorkerPrincipals);
|
|
JS_SetWrapObjectCallbacks(cx, &WrapObjectCallbacks);
|
|
if (mWorkerPrivate->IsDedicatedWorker()) {
|
|
JS_SetFutexCanWait(cx);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
virtual void DispatchToMicroTask(already_AddRefed<MicroTaskRunnable> aRunnable) override
|
|
{
|
|
RefPtr<MicroTaskRunnable> runnable(aRunnable);
|
|
|
|
MOZ_ASSERT(!NS_IsMainThread());
|
|
MOZ_ASSERT(runnable);
|
|
|
|
std::queue<RefPtr<MicroTaskRunnable>>* microTaskQueue = nullptr;
|
|
|
|
JSContext* cx = GetCurrentWorkerThreadJSContext();
|
|
NS_ASSERTION(cx, "This should never be null!");
|
|
|
|
JS::Rooted<JSObject*> global(cx, JS::CurrentGlobalOrNull(cx));
|
|
NS_ASSERTION(global, "This should never be null!");
|
|
|
|
// On worker threads, if the current global is the worker global, we use the
|
|
// main micro task queue. Otherwise, the current global must be
|
|
// either the debugger global or a debugger sandbox, and we use the debugger
|
|
// micro task queue instead.
|
|
if (IsWorkerGlobal(global)) {
|
|
microTaskQueue = &GetMicroTaskQueue();
|
|
} else {
|
|
MOZ_ASSERT(IsWorkerDebuggerGlobal(global) ||
|
|
IsWorkerDebuggerSandbox(global));
|
|
|
|
microTaskQueue = &GetDebuggerMicroTaskQueue();
|
|
}
|
|
|
|
JS::JobQueueMayNotBeEmpty(cx);
|
|
microTaskQueue->push(runnable.forget());
|
|
}
|
|
|
|
bool IsSystemCaller() const override
|
|
{
|
|
return mWorkerPrivate->UsesSystemPrincipal();
|
|
}
|
|
|
|
WorkerPrivate* GetWorkerPrivate() const
|
|
{
|
|
return mWorkerPrivate;
|
|
}
|
|
|
|
private:
|
|
WorkerPrivate* mWorkerPrivate;
|
|
};
|
|
|
|
namespace workerinternals {
|
|
|
|
namespace {
|
|
|
|
class WorkerThreadPrimaryRunnable final : public Runnable
|
|
{
|
|
WorkerPrivate* mWorkerPrivate;
|
|
RefPtr<WorkerThread> mThread;
|
|
JSRuntime* mParentRuntime;
|
|
|
|
class FinishedRunnable final : public Runnable
|
|
{
|
|
RefPtr<WorkerThread> mThread;
|
|
|
|
public:
|
|
explicit FinishedRunnable(already_AddRefed<WorkerThread> aThread)
|
|
: Runnable("WorkerThreadPrimaryRunnable::FinishedRunnable")
|
|
, mThread(aThread)
|
|
{
|
|
MOZ_ASSERT(mThread);
|
|
}
|
|
|
|
NS_INLINE_DECL_REFCOUNTING_INHERITED(FinishedRunnable, Runnable)
|
|
|
|
private:
|
|
~FinishedRunnable()
|
|
{ }
|
|
|
|
NS_DECL_NSIRUNNABLE
|
|
};
|
|
|
|
public:
|
|
WorkerThreadPrimaryRunnable(WorkerPrivate* aWorkerPrivate,
|
|
WorkerThread* aThread,
|
|
JSRuntime* aParentRuntime)
|
|
: mozilla::Runnable("WorkerThreadPrimaryRunnable")
|
|
, mWorkerPrivate(aWorkerPrivate)
|
|
, mThread(aThread)
|
|
, mParentRuntime(aParentRuntime)
|
|
{
|
|
MOZ_ASSERT(aWorkerPrivate);
|
|
MOZ_ASSERT(aThread);
|
|
}
|
|
|
|
NS_INLINE_DECL_REFCOUNTING_INHERITED(WorkerThreadPrimaryRunnable, Runnable)
|
|
|
|
private:
|
|
~WorkerThreadPrimaryRunnable()
|
|
{ }
|
|
|
|
NS_DECL_NSIRUNNABLE
|
|
};
|
|
|
|
void
|
|
PrefLanguagesChanged(const char* /* aPrefName */, void* /* aClosure */)
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
nsTArray<nsString> languages;
|
|
Navigator::GetAcceptLanguages(languages);
|
|
|
|
RuntimeService* runtime = RuntimeService::GetService();
|
|
if (runtime) {
|
|
runtime->UpdateAllWorkerLanguages(languages);
|
|
}
|
|
}
|
|
|
|
void
|
|
AppNameOverrideChanged(const char* /* aPrefName */, void* /* aClosure */)
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
nsAutoString override;
|
|
Preferences::GetString("general.appname.override", override);
|
|
|
|
RuntimeService* runtime = RuntimeService::GetService();
|
|
if (runtime) {
|
|
runtime->UpdateAppNameOverridePreference(override);
|
|
}
|
|
}
|
|
|
|
void
|
|
AppVersionOverrideChanged(const char* /* aPrefName */, void* /* aClosure */)
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
nsAutoString override;
|
|
Preferences::GetString("general.appversion.override", override);
|
|
|
|
RuntimeService* runtime = RuntimeService::GetService();
|
|
if (runtime) {
|
|
runtime->UpdateAppVersionOverridePreference(override);
|
|
}
|
|
}
|
|
|
|
void
|
|
PlatformOverrideChanged(const char* /* aPrefName */, void* /* aClosure */)
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
nsAutoString override;
|
|
Preferences::GetString("general.platform.override", override);
|
|
|
|
RuntimeService* runtime = RuntimeService::GetService();
|
|
if (runtime) {
|
|
runtime->UpdatePlatformOverridePreference(override);
|
|
}
|
|
}
|
|
|
|
} /* anonymous namespace */
|
|
|
|
struct RuntimeService::IdleThreadInfo
|
|
{
|
|
RefPtr<WorkerThread> mThread;
|
|
mozilla::TimeStamp mExpirationTime;
|
|
};
|
|
|
|
// This is only touched on the main thread. Initialized in Init() below.
|
|
JSSettings RuntimeService::sDefaultJSSettings;
|
|
|
|
RuntimeService::RuntimeService()
|
|
: mMutex("RuntimeService::mMutex"), mObserved(false),
|
|
mShuttingDown(false), mNavigatorPropertiesLoaded(false)
|
|
{
|
|
AssertIsOnMainThread();
|
|
NS_ASSERTION(!gRuntimeService, "More than one service!");
|
|
}
|
|
|
|
RuntimeService::~RuntimeService()
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
// gRuntimeService can be null if Init() fails.
|
|
NS_ASSERTION(!gRuntimeService || gRuntimeService == this,
|
|
"More than one service!");
|
|
|
|
gRuntimeService = nullptr;
|
|
}
|
|
|
|
// static
|
|
RuntimeService*
|
|
RuntimeService::GetOrCreateService()
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
if (!gRuntimeService) {
|
|
// The observer service now owns us until shutdown.
|
|
gRuntimeService = new RuntimeService();
|
|
if (NS_FAILED(gRuntimeService->Init())) {
|
|
NS_WARNING("Failed to initialize!");
|
|
gRuntimeService->Cleanup();
|
|
gRuntimeService = nullptr;
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
return gRuntimeService;
|
|
}
|
|
|
|
// static
|
|
RuntimeService*
|
|
RuntimeService::GetService()
|
|
{
|
|
return gRuntimeService;
|
|
}
|
|
|
|
bool
|
|
RuntimeService::RegisterWorker(WorkerPrivate* aWorkerPrivate)
|
|
{
|
|
aWorkerPrivate->AssertIsOnParentThread();
|
|
|
|
WorkerPrivate* parent = aWorkerPrivate->GetParent();
|
|
if (!parent) {
|
|
AssertIsOnMainThread();
|
|
|
|
if (mShuttingDown) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
const bool isServiceWorker = aWorkerPrivate->IsServiceWorker();
|
|
const bool isSharedWorker = aWorkerPrivate->IsSharedWorker();
|
|
const bool isDedicatedWorker = aWorkerPrivate->IsDedicatedWorker();
|
|
if (isServiceWorker) {
|
|
AssertIsOnMainThread();
|
|
Telemetry::Accumulate(Telemetry::SERVICE_WORKER_SPAWN_ATTEMPTS, 1);
|
|
}
|
|
|
|
nsCString sharedWorkerScriptSpec;
|
|
if (isSharedWorker) {
|
|
AssertIsOnMainThread();
|
|
|
|
nsCOMPtr<nsIURI> scriptURI = aWorkerPrivate->GetResolvedScriptURI();
|
|
NS_ASSERTION(scriptURI, "Null script URI!");
|
|
|
|
nsresult rv = scriptURI->GetSpec(sharedWorkerScriptSpec);
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING("GetSpec failed?!");
|
|
return false;
|
|
}
|
|
|
|
NS_ASSERTION(!sharedWorkerScriptSpec.IsEmpty(), "Empty spec!");
|
|
}
|
|
|
|
bool exemptFromPerDomainMax = false;
|
|
if (isServiceWorker) {
|
|
AssertIsOnMainThread();
|
|
exemptFromPerDomainMax = Preferences::GetBool("dom.serviceWorkers.exemptFromPerDomainMax",
|
|
false);
|
|
}
|
|
|
|
const nsCString& domain = aWorkerPrivate->Domain();
|
|
|
|
WorkerDomainInfo* domainInfo;
|
|
bool queued = false;
|
|
{
|
|
MutexAutoLock lock(mMutex);
|
|
|
|
domainInfo = mDomainMap.LookupForAdd(domain).OrInsert(
|
|
[&domain, parent] () {
|
|
NS_ASSERTION(!parent, "Shouldn't have a parent here!");
|
|
Unused << parent; // silence clang -Wunused-lambda-capture in opt builds
|
|
WorkerDomainInfo* wdi = new WorkerDomainInfo();
|
|
wdi->mDomain = domain;
|
|
return wdi;
|
|
});
|
|
|
|
queued = gMaxWorkersPerDomain &&
|
|
domainInfo->ActiveWorkerCount() >= gMaxWorkersPerDomain &&
|
|
!domain.IsEmpty() &&
|
|
!exemptFromPerDomainMax;
|
|
|
|
if (queued) {
|
|
domainInfo->mQueuedWorkers.AppendElement(aWorkerPrivate);
|
|
|
|
// Worker spawn gets queued due to hitting max workers per domain
|
|
// limit so let's log a warning.
|
|
WorkerPrivate::ReportErrorToConsole("HittingMaxWorkersPerDomain2");
|
|
|
|
if (isServiceWorker) {
|
|
Telemetry::Accumulate(Telemetry::SERVICE_WORKER_SPAWN_GETS_QUEUED, 1);
|
|
} else if (isSharedWorker) {
|
|
Telemetry::Accumulate(Telemetry::SHARED_WORKER_SPAWN_GETS_QUEUED, 1);
|
|
} else if (isDedicatedWorker) {
|
|
Telemetry::Accumulate(Telemetry::DEDICATED_WORKER_SPAWN_GETS_QUEUED, 1);
|
|
}
|
|
}
|
|
else if (parent) {
|
|
domainInfo->mChildWorkerCount++;
|
|
}
|
|
else if (isServiceWorker) {
|
|
domainInfo->mActiveServiceWorkers.AppendElement(aWorkerPrivate);
|
|
}
|
|
else {
|
|
domainInfo->mActiveWorkers.AppendElement(aWorkerPrivate);
|
|
}
|
|
|
|
if (isSharedWorker) {
|
|
#ifdef DEBUG
|
|
for (const UniquePtr<SharedWorkerInfo>& data : domainInfo->mSharedWorkerInfos) {
|
|
if (data->mScriptSpec == sharedWorkerScriptSpec &&
|
|
data->mName == aWorkerPrivate->WorkerName() &&
|
|
// We want to be sure that the window's principal subsumes the
|
|
// SharedWorker's principal and vice versa.
|
|
data->mWorkerPrivate->GetPrincipal()->Subsumes(aWorkerPrivate->GetPrincipal()) &&
|
|
aWorkerPrivate->GetPrincipal()->Subsumes(data->mWorkerPrivate->GetPrincipal())) {
|
|
MOZ_CRASH("We should not instantiate a new SharedWorker!");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
UniquePtr<SharedWorkerInfo> sharedWorkerInfo(
|
|
new SharedWorkerInfo(aWorkerPrivate, sharedWorkerScriptSpec,
|
|
aWorkerPrivate->WorkerName()));
|
|
domainInfo->mSharedWorkerInfos.AppendElement(std::move(sharedWorkerInfo));
|
|
}
|
|
}
|
|
|
|
// From here on out we must call UnregisterWorker if something fails!
|
|
if (parent) {
|
|
if (!parent->AddChildWorker(aWorkerPrivate)) {
|
|
UnregisterWorker(aWorkerPrivate);
|
|
return false;
|
|
}
|
|
}
|
|
else {
|
|
if (!mNavigatorPropertiesLoaded) {
|
|
Navigator::AppName(mNavigatorProperties.mAppName,
|
|
false /* aUsePrefOverriddenValue */);
|
|
if (NS_FAILED(Navigator::GetAppVersion(mNavigatorProperties.mAppVersion,
|
|
false /* aUsePrefOverriddenValue */)) ||
|
|
NS_FAILED(Navigator::GetPlatform(mNavigatorProperties.mPlatform,
|
|
false /* aUsePrefOverriddenValue */))) {
|
|
UnregisterWorker(aWorkerPrivate);
|
|
return false;
|
|
}
|
|
|
|
// The navigator overridden properties should have already been read.
|
|
|
|
Navigator::GetAcceptLanguages(mNavigatorProperties.mLanguages);
|
|
mNavigatorPropertiesLoaded = true;
|
|
}
|
|
|
|
nsPIDOMWindowInner* window = aWorkerPrivate->GetWindow();
|
|
|
|
if (!isServiceWorker) {
|
|
// Service workers are excluded since their lifetime is separate from
|
|
// that of dom windows.
|
|
nsTArray<WorkerPrivate*>* windowArray =
|
|
mWindowMap.LookupForAdd(window).OrInsert(
|
|
[] () { return new nsTArray<WorkerPrivate*>(1); });
|
|
if (!windowArray->Contains(aWorkerPrivate)) {
|
|
windowArray->AppendElement(aWorkerPrivate);
|
|
} else {
|
|
MOZ_ASSERT(aWorkerPrivate->IsSharedWorker());
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!queued && !ScheduleWorker(aWorkerPrivate)) {
|
|
return false;
|
|
}
|
|
|
|
if (isServiceWorker) {
|
|
AssertIsOnMainThread();
|
|
Telemetry::Accumulate(Telemetry::SERVICE_WORKER_WAS_SPAWNED, 1);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void
|
|
RuntimeService::RemoveSharedWorker(WorkerDomainInfo* aDomainInfo,
|
|
WorkerPrivate* aWorkerPrivate)
|
|
{
|
|
for (uint32_t i = 0; i < aDomainInfo->mSharedWorkerInfos.Length(); ++i) {
|
|
const UniquePtr<SharedWorkerInfo>& data =
|
|
aDomainInfo->mSharedWorkerInfos[i];
|
|
if (data->mWorkerPrivate == aWorkerPrivate) {
|
|
aDomainInfo->mSharedWorkerInfos.RemoveElementAt(i);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
RuntimeService::UnregisterWorker(WorkerPrivate* aWorkerPrivate)
|
|
{
|
|
aWorkerPrivate->AssertIsOnParentThread();
|
|
|
|
WorkerPrivate* parent = aWorkerPrivate->GetParent();
|
|
if (!parent) {
|
|
AssertIsOnMainThread();
|
|
}
|
|
|
|
const nsCString& domain = aWorkerPrivate->Domain();
|
|
|
|
WorkerPrivate* queuedWorker = nullptr;
|
|
{
|
|
MutexAutoLock lock(mMutex);
|
|
|
|
WorkerDomainInfo* domainInfo;
|
|
if (!mDomainMap.Get(domain, &domainInfo)) {
|
|
NS_ERROR("Don't have an entry for this domain!");
|
|
}
|
|
|
|
// Remove old worker from everywhere.
|
|
uint32_t index = domainInfo->mQueuedWorkers.IndexOf(aWorkerPrivate);
|
|
if (index != kNoIndex) {
|
|
// Was queued, remove from the list.
|
|
domainInfo->mQueuedWorkers.RemoveElementAt(index);
|
|
}
|
|
else if (parent) {
|
|
MOZ_ASSERT(domainInfo->mChildWorkerCount, "Must be non-zero!");
|
|
domainInfo->mChildWorkerCount--;
|
|
}
|
|
else if (aWorkerPrivate->IsServiceWorker()) {
|
|
MOZ_ASSERT(domainInfo->mActiveServiceWorkers.Contains(aWorkerPrivate),
|
|
"Don't know about this worker!");
|
|
domainInfo->mActiveServiceWorkers.RemoveElement(aWorkerPrivate);
|
|
}
|
|
else {
|
|
MOZ_ASSERT(domainInfo->mActiveWorkers.Contains(aWorkerPrivate),
|
|
"Don't know about this worker!");
|
|
domainInfo->mActiveWorkers.RemoveElement(aWorkerPrivate);
|
|
}
|
|
|
|
if (aWorkerPrivate->IsSharedWorker()) {
|
|
RemoveSharedWorker(domainInfo, aWorkerPrivate);
|
|
}
|
|
|
|
// See if there's a queued worker we can schedule.
|
|
if (domainInfo->ActiveWorkerCount() < gMaxWorkersPerDomain &&
|
|
!domainInfo->mQueuedWorkers.IsEmpty()) {
|
|
queuedWorker = domainInfo->mQueuedWorkers[0];
|
|
domainInfo->mQueuedWorkers.RemoveElementAt(0);
|
|
|
|
if (queuedWorker->GetParent()) {
|
|
domainInfo->mChildWorkerCount++;
|
|
}
|
|
else if (queuedWorker->IsServiceWorker()) {
|
|
domainInfo->mActiveServiceWorkers.AppendElement(queuedWorker);
|
|
}
|
|
else {
|
|
domainInfo->mActiveWorkers.AppendElement(queuedWorker);
|
|
}
|
|
}
|
|
|
|
if (domainInfo->HasNoWorkers()) {
|
|
MOZ_ASSERT(domainInfo->mQueuedWorkers.IsEmpty());
|
|
mDomainMap.Remove(domain);
|
|
}
|
|
}
|
|
|
|
if (aWorkerPrivate->IsServiceWorker()) {
|
|
AssertIsOnMainThread();
|
|
Telemetry::AccumulateTimeDelta(Telemetry::SERVICE_WORKER_LIFE_TIME,
|
|
aWorkerPrivate->CreationTimeStamp());
|
|
}
|
|
|
|
if (aWorkerPrivate->IsSharedWorker() ||
|
|
aWorkerPrivate->IsServiceWorker()) {
|
|
AssertIsOnMainThread();
|
|
aWorkerPrivate->CloseAllSharedWorkers();
|
|
}
|
|
|
|
if (parent) {
|
|
parent->RemoveChildWorker(aWorkerPrivate);
|
|
}
|
|
else if (aWorkerPrivate->IsSharedWorker()) {
|
|
AssertIsOnMainThread();
|
|
|
|
for (auto iter = mWindowMap.Iter(); !iter.Done(); iter.Next()) {
|
|
nsAutoPtr<nsTArray<WorkerPrivate*>>& workers = iter.Data();
|
|
MOZ_ASSERT(workers.get());
|
|
|
|
if (workers->RemoveElement(aWorkerPrivate)) {
|
|
MOZ_ASSERT(!workers->Contains(aWorkerPrivate),
|
|
"Added worker more than once!");
|
|
|
|
if (workers->IsEmpty()) {
|
|
iter.Remove();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (aWorkerPrivate->IsDedicatedWorker()) {
|
|
// May be null.
|
|
nsPIDOMWindowInner* window = aWorkerPrivate->GetWindow();
|
|
if (auto entry = mWindowMap.Lookup(window)) {
|
|
MOZ_ALWAYS_TRUE(entry.Data()->RemoveElement(aWorkerPrivate));
|
|
if (entry.Data()->IsEmpty()) {
|
|
entry.Remove();
|
|
}
|
|
} else {
|
|
MOZ_ASSERT_UNREACHABLE("window is not in mWindowMap");
|
|
}
|
|
}
|
|
|
|
if (queuedWorker && !ScheduleWorker(queuedWorker)) {
|
|
UnregisterWorker(queuedWorker);
|
|
}
|
|
}
|
|
|
|
bool
|
|
RuntimeService::ScheduleWorker(WorkerPrivate* aWorkerPrivate)
|
|
{
|
|
if (!aWorkerPrivate->Start()) {
|
|
// This is ok, means that we didn't need to make a thread for this worker.
|
|
return true;
|
|
}
|
|
|
|
RefPtr<WorkerThread> thread;
|
|
{
|
|
MutexAutoLock lock(mMutex);
|
|
if (!mIdleThreadArray.IsEmpty()) {
|
|
uint32_t index = mIdleThreadArray.Length() - 1;
|
|
mIdleThreadArray[index].mThread.swap(thread);
|
|
mIdleThreadArray.RemoveElementAt(index);
|
|
}
|
|
}
|
|
|
|
const WorkerThreadFriendKey friendKey;
|
|
|
|
if (!thread) {
|
|
thread = WorkerThread::Create(friendKey);
|
|
if (!thread) {
|
|
UnregisterWorker(aWorkerPrivate);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
int32_t priority = aWorkerPrivate->IsChromeWorker() ?
|
|
nsISupportsPriority::PRIORITY_NORMAL :
|
|
nsISupportsPriority::PRIORITY_LOW;
|
|
|
|
if (NS_FAILED(thread->SetPriority(priority))) {
|
|
NS_WARNING("Could not set the thread's priority!");
|
|
}
|
|
|
|
JSContext* cx = CycleCollectedJSContext::Get()->Context();
|
|
nsCOMPtr<nsIRunnable> runnable =
|
|
new WorkerThreadPrimaryRunnable(aWorkerPrivate, thread,
|
|
JS_GetParentRuntime(cx));
|
|
if (NS_FAILED(thread->DispatchPrimaryRunnable(friendKey, runnable.forget()))) {
|
|
UnregisterWorker(aWorkerPrivate);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// static
|
|
void
|
|
RuntimeService::ShutdownIdleThreads(nsITimer* aTimer, void* /* aClosure */)
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
RuntimeService* runtime = RuntimeService::GetService();
|
|
NS_ASSERTION(runtime, "This should never be null!");
|
|
|
|
NS_ASSERTION(aTimer == runtime->mIdleThreadTimer, "Wrong timer!");
|
|
|
|
// Cheat a little and grab all threads that expire within one second of now.
|
|
TimeStamp now = TimeStamp::NowLoRes() + TimeDuration::FromSeconds(1);
|
|
|
|
TimeStamp nextExpiration;
|
|
|
|
AutoTArray<RefPtr<WorkerThread>, 20> expiredThreads;
|
|
{
|
|
MutexAutoLock lock(runtime->mMutex);
|
|
|
|
for (uint32_t index = 0; index < runtime->mIdleThreadArray.Length();
|
|
index++) {
|
|
IdleThreadInfo& info = runtime->mIdleThreadArray[index];
|
|
if (info.mExpirationTime > now) {
|
|
nextExpiration = info.mExpirationTime;
|
|
break;
|
|
}
|
|
|
|
RefPtr<WorkerThread>* thread = expiredThreads.AppendElement();
|
|
thread->swap(info.mThread);
|
|
}
|
|
|
|
if (!expiredThreads.IsEmpty()) {
|
|
runtime->mIdleThreadArray.RemoveElementsAt(0, expiredThreads.Length());
|
|
}
|
|
}
|
|
|
|
if (!nextExpiration.IsNull()) {
|
|
TimeDuration delta = nextExpiration - TimeStamp::NowLoRes();
|
|
uint32_t delay(delta > TimeDuration(0) ? delta.ToMilliseconds() : 0);
|
|
|
|
// Reschedule the timer.
|
|
MOZ_ALWAYS_SUCCEEDS(
|
|
aTimer->InitWithNamedFuncCallback(ShutdownIdleThreads,
|
|
nullptr,
|
|
delay,
|
|
nsITimer::TYPE_ONE_SHOT,
|
|
"RuntimeService::ShutdownIdleThreads"));
|
|
}
|
|
|
|
for (uint32_t index = 0; index < expiredThreads.Length(); index++) {
|
|
if (NS_FAILED(expiredThreads[index]->Shutdown())) {
|
|
NS_WARNING("Failed to shutdown thread!");
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
RuntimeService::Init()
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
nsLayoutStatics::AddRef();
|
|
|
|
// Initialize JSSettings.
|
|
if (sDefaultJSSettings.gcSettings[0].key.isNothing()) {
|
|
sDefaultJSSettings.contextOptions = JS::ContextOptions();
|
|
sDefaultJSSettings.chrome.maxScriptRuntime = -1;
|
|
sDefaultJSSettings.content.maxScriptRuntime = MAX_SCRIPT_RUN_TIME_SEC;
|
|
#ifdef JS_GC_ZEAL
|
|
sDefaultJSSettings.gcZealFrequency = JS_DEFAULT_ZEAL_FREQ;
|
|
sDefaultJSSettings.gcZeal = 0;
|
|
#endif
|
|
SetDefaultJSGCSettings(JSGC_MAX_BYTES, WORKER_DEFAULT_RUNTIME_HEAPSIZE);
|
|
SetDefaultJSGCSettings(JSGC_ALLOCATION_THRESHOLD,
|
|
WORKER_DEFAULT_ALLOCATION_THRESHOLD);
|
|
}
|
|
|
|
// nsIStreamTransportService is thread-safe but it must be initialized on the
|
|
// main-thread. FileReader needs it, so, let's initialize it now.
|
|
nsresult rv;
|
|
nsCOMPtr<nsIStreamTransportService> sts =
|
|
do_GetService(kStreamTransportServiceCID, &rv);
|
|
NS_ENSURE_TRUE(sts, NS_ERROR_FAILURE);
|
|
|
|
mIdleThreadTimer = NS_NewTimer();
|
|
NS_ENSURE_STATE(mIdleThreadTimer);
|
|
|
|
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
|
|
NS_ENSURE_TRUE(obs, NS_ERROR_FAILURE);
|
|
|
|
rv = obs->AddObserver(this, NS_XPCOM_SHUTDOWN_THREADS_OBSERVER_ID, false);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = obs->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
mObserved = true;
|
|
|
|
if (NS_FAILED(obs->AddObserver(this, GC_REQUEST_OBSERVER_TOPIC, false))) {
|
|
NS_WARNING("Failed to register for GC request notifications!");
|
|
}
|
|
|
|
if (NS_FAILED(obs->AddObserver(this, CC_REQUEST_OBSERVER_TOPIC, false))) {
|
|
NS_WARNING("Failed to register for CC request notifications!");
|
|
}
|
|
|
|
if (NS_FAILED(obs->AddObserver(this, MEMORY_PRESSURE_OBSERVER_TOPIC,
|
|
false))) {
|
|
NS_WARNING("Failed to register for memory pressure notifications!");
|
|
}
|
|
|
|
if (NS_FAILED(obs->AddObserver(this, NS_IOSERVICE_OFFLINE_STATUS_TOPIC, false))) {
|
|
NS_WARNING("Failed to register for offline notification event!");
|
|
}
|
|
|
|
MOZ_ASSERT(!gRuntimeServiceDuringInit, "This should be false!");
|
|
gRuntimeServiceDuringInit = true;
|
|
|
|
if (NS_FAILED(Preferences::RegisterPrefixCallback(
|
|
LoadJSGCMemoryOptions,
|
|
PREF_JS_OPTIONS_PREFIX PREF_MEM_OPTIONS_PREFIX)) ||
|
|
NS_FAILED(Preferences::RegisterPrefixCallbackAndCall(
|
|
LoadJSGCMemoryOptions,
|
|
PREF_WORKERS_OPTIONS_PREFIX PREF_MEM_OPTIONS_PREFIX)) ||
|
|
#ifdef JS_GC_ZEAL
|
|
NS_FAILED(Preferences::RegisterCallback(
|
|
LoadGCZealOptions,
|
|
PREF_JS_OPTIONS_PREFIX PREF_GCZEAL)) ||
|
|
#endif
|
|
|
|
#define WORKER_PREF(name, callback) \
|
|
NS_FAILED(Preferences::RegisterCallbackAndCall( \
|
|
callback, \
|
|
name)) ||
|
|
WORKER_PREF("intl.accept_languages", PrefLanguagesChanged)
|
|
WORKER_PREF("general.appname.override", AppNameOverrideChanged)
|
|
WORKER_PREF("general.appversion.override", AppVersionOverrideChanged)
|
|
WORKER_PREF("general.platform.override", PlatformOverrideChanged)
|
|
#ifdef JS_GC_ZEAL
|
|
WORKER_PREF("dom.workers.options.gcZeal", LoadGCZealOptions)
|
|
#endif
|
|
#undef WORKER_PREF
|
|
|
|
NS_FAILED(Preferences::RegisterPrefixCallbackAndCall(
|
|
LoadContextOptions,
|
|
PREF_WORKERS_OPTIONS_PREFIX)) ||
|
|
NS_FAILED(Preferences::RegisterPrefixCallback(LoadContextOptions,
|
|
PREF_JS_OPTIONS_PREFIX))) {
|
|
NS_WARNING("Failed to register pref callbacks!");
|
|
}
|
|
|
|
MOZ_ASSERT(gRuntimeServiceDuringInit, "Should be true!");
|
|
gRuntimeServiceDuringInit = false;
|
|
|
|
// We assume atomic 32bit reads/writes. If this assumption doesn't hold on
|
|
// some wacky platform then the worst that could happen is that the close
|
|
// handler will run for a slightly different amount of time.
|
|
if (NS_FAILED(Preferences::AddIntVarCache(
|
|
&sDefaultJSSettings.content.maxScriptRuntime,
|
|
PREF_MAX_SCRIPT_RUN_TIME_CONTENT,
|
|
MAX_SCRIPT_RUN_TIME_SEC)) ||
|
|
NS_FAILED(Preferences::AddIntVarCache(
|
|
&sDefaultJSSettings.chrome.maxScriptRuntime,
|
|
PREF_MAX_SCRIPT_RUN_TIME_CHROME, -1))) {
|
|
NS_WARNING("Failed to register timeout cache!");
|
|
}
|
|
|
|
int32_t maxPerDomain = Preferences::GetInt(PREF_WORKERS_MAX_PER_DOMAIN,
|
|
MAX_WORKERS_PER_DOMAIN);
|
|
gMaxWorkersPerDomain = std::max(0, maxPerDomain);
|
|
|
|
int32_t maxHardwareConcurrency =
|
|
Preferences::GetInt(PREF_WORKERS_MAX_HARDWARE_CONCURRENCY,
|
|
MAX_HARDWARE_CONCURRENCY);
|
|
gMaxHardwareConcurrency = std::max(0, maxHardwareConcurrency);
|
|
|
|
RefPtr<OSFileConstantsService> osFileConstantsService =
|
|
OSFileConstantsService::GetOrCreate();
|
|
if (NS_WARN_IF(!osFileConstantsService)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (NS_WARN_IF(!IndexedDatabaseManager::GetOrCreate())) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
// PerformanceService must be initialized on the main-thread.
|
|
PerformanceService::GetOrCreate();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
RuntimeService::Shutdown()
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
MOZ_ASSERT(!mShuttingDown);
|
|
// That's it, no more workers.
|
|
mShuttingDown = true;
|
|
|
|
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
|
|
NS_WARNING_ASSERTION(obs, "Failed to get observer service?!");
|
|
|
|
// Tell anyone that cares that they're about to lose worker support.
|
|
if (obs && NS_FAILED(obs->NotifyObservers(nullptr, WORKERS_SHUTDOWN_TOPIC,
|
|
nullptr))) {
|
|
NS_WARNING("NotifyObservers failed!");
|
|
}
|
|
|
|
{
|
|
MutexAutoLock lock(mMutex);
|
|
|
|
AutoTArray<WorkerPrivate*, 100> workers;
|
|
AddAllTopLevelWorkersToArray(workers);
|
|
|
|
if (!workers.IsEmpty()) {
|
|
// Cancel all top-level workers.
|
|
{
|
|
MutexAutoUnlock unlock(mMutex);
|
|
|
|
for (uint32_t index = 0; index < workers.Length(); index++) {
|
|
if (!workers[index]->Kill()) {
|
|
NS_WARNING("Failed to cancel worker!");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
|
|
class CrashIfHangingRunnable : public WorkerControlRunnable
|
|
{
|
|
public:
|
|
explicit CrashIfHangingRunnable(WorkerPrivate* aWorkerPrivate)
|
|
: WorkerControlRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount)
|
|
, mMonitor("CrashIfHangingRunnable::mMonitor")
|
|
{}
|
|
|
|
bool
|
|
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override
|
|
{
|
|
aWorkerPrivate->DumpCrashInformation(mMsg);
|
|
|
|
MonitorAutoLock lock(mMonitor);
|
|
lock.Notify();
|
|
return true;
|
|
}
|
|
|
|
nsresult
|
|
Cancel() override
|
|
{
|
|
mMsg.Assign("Canceled");
|
|
|
|
MonitorAutoLock lock(mMonitor);
|
|
lock.Notify();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
DispatchAndWait()
|
|
{
|
|
MonitorAutoLock lock(mMonitor);
|
|
|
|
if (!Dispatch()) {
|
|
mMsg.Assign("Dispatch Error");
|
|
return;
|
|
}
|
|
|
|
lock.Wait();
|
|
}
|
|
|
|
const nsCString&
|
|
MsgData() const
|
|
{
|
|
return mMsg;
|
|
}
|
|
|
|
private:
|
|
bool
|
|
PreDispatch(WorkerPrivate* aWorkerPrivate) override
|
|
{
|
|
return true;
|
|
}
|
|
|
|
void
|
|
PostDispatch(WorkerPrivate* aWorkerPrivate, bool aDispatchResult) override
|
|
{}
|
|
|
|
Monitor mMonitor;
|
|
nsCString mMsg;
|
|
};
|
|
|
|
} // anonymous
|
|
|
|
void
|
|
RuntimeService::CrashIfHanging()
|
|
{
|
|
MutexAutoLock lock(mMutex);
|
|
|
|
if (mDomainMap.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
uint32_t activeWorkers = 0;
|
|
uint32_t activeServiceWorkers = 0;
|
|
uint32_t inactiveWorkers = 0;
|
|
|
|
nsTArray<WorkerPrivate*> workers;
|
|
|
|
for (auto iter = mDomainMap.Iter(); !iter.Done(); iter.Next()) {
|
|
WorkerDomainInfo* aData = iter.UserData();
|
|
|
|
activeWorkers += aData->mActiveWorkers.Length();
|
|
activeServiceWorkers += aData->mActiveServiceWorkers.Length();
|
|
|
|
workers.AppendElements(aData->mActiveWorkers);
|
|
workers.AppendElements(aData->mActiveServiceWorkers);
|
|
|
|
// These might not be top-level workers...
|
|
for (uint32_t index = 0; index < aData->mQueuedWorkers.Length(); index++) {
|
|
WorkerPrivate* worker = aData->mQueuedWorkers[index];
|
|
if (!worker->GetParent()) {
|
|
++inactiveWorkers;
|
|
}
|
|
}
|
|
}
|
|
|
|
// We must have something pending...
|
|
MOZ_DIAGNOSTIC_ASSERT(activeWorkers + activeServiceWorkers + inactiveWorkers);
|
|
|
|
nsCString msg;
|
|
|
|
// A: active Workers | S: active ServiceWorkers | Q: queued Workers
|
|
msg.AppendPrintf("Workers Hanging - %d|A:%d|S:%d|Q:%d", mShuttingDown ? 1 : 0,
|
|
activeWorkers, activeServiceWorkers, inactiveWorkers);
|
|
|
|
// For each thread, let's print some data to know what is going wrong.
|
|
for (uint32_t i = 0; i < workers.Length(); ++i) {
|
|
WorkerPrivate* workerPrivate = workers[i];
|
|
|
|
// BC: Busy Count
|
|
msg.AppendPrintf("-BC:%d", workerPrivate->BusyCount());
|
|
|
|
RefPtr<CrashIfHangingRunnable> runnable = new
|
|
CrashIfHangingRunnable(workerPrivate);
|
|
runnable->DispatchAndWait();
|
|
|
|
msg.Append(runnable->MsgData());
|
|
}
|
|
|
|
// This string will be leaked.
|
|
MOZ_CRASH_UNSAFE_OOL(strdup(msg.BeginReading()));
|
|
}
|
|
|
|
// This spins the event loop until all workers are finished and their threads
|
|
// have been joined.
|
|
void
|
|
RuntimeService::Cleanup()
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
|
|
NS_WARNING_ASSERTION(obs, "Failed to get observer service?!");
|
|
|
|
if (mIdleThreadTimer) {
|
|
if (NS_FAILED(mIdleThreadTimer->Cancel())) {
|
|
NS_WARNING("Failed to cancel idle timer!");
|
|
}
|
|
mIdleThreadTimer = nullptr;
|
|
}
|
|
|
|
{
|
|
MutexAutoLock lock(mMutex);
|
|
|
|
AutoTArray<WorkerPrivate*, 100> workers;
|
|
AddAllTopLevelWorkersToArray(workers);
|
|
|
|
if (!workers.IsEmpty()) {
|
|
nsIThread* currentThread = NS_GetCurrentThread();
|
|
NS_ASSERTION(currentThread, "This should never be null!");
|
|
|
|
// Shut down any idle threads.
|
|
if (!mIdleThreadArray.IsEmpty()) {
|
|
AutoTArray<RefPtr<WorkerThread>, 20> idleThreads;
|
|
|
|
uint32_t idleThreadCount = mIdleThreadArray.Length();
|
|
idleThreads.SetLength(idleThreadCount);
|
|
|
|
for (uint32_t index = 0; index < idleThreadCount; index++) {
|
|
NS_ASSERTION(mIdleThreadArray[index].mThread, "Null thread!");
|
|
idleThreads[index].swap(mIdleThreadArray[index].mThread);
|
|
}
|
|
|
|
mIdleThreadArray.Clear();
|
|
|
|
MutexAutoUnlock unlock(mMutex);
|
|
|
|
for (uint32_t index = 0; index < idleThreadCount; index++) {
|
|
if (NS_FAILED(idleThreads[index]->Shutdown())) {
|
|
NS_WARNING("Failed to shutdown thread!");
|
|
}
|
|
}
|
|
}
|
|
|
|
// And make sure all their final messages have run and all their threads
|
|
// have joined.
|
|
while (mDomainMap.Count()) {
|
|
MutexAutoUnlock unlock(mMutex);
|
|
|
|
if (!NS_ProcessNextEvent(currentThread)) {
|
|
NS_WARNING("Something bad happened!");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
NS_ASSERTION(!mWindowMap.Count(), "All windows should have been released!");
|
|
|
|
if (mObserved) {
|
|
if (NS_FAILED(Preferences::UnregisterPrefixCallback(LoadContextOptions,
|
|
PREF_JS_OPTIONS_PREFIX)) ||
|
|
NS_FAILED(Preferences::UnregisterPrefixCallback(LoadContextOptions,
|
|
PREF_WORKERS_OPTIONS_PREFIX)) ||
|
|
|
|
#define WORKER_PREF(name, callback) \
|
|
NS_FAILED(Preferences::UnregisterCallback( \
|
|
callback, \
|
|
name)) ||
|
|
WORKER_PREF("intl.accept_languages", PrefLanguagesChanged)
|
|
WORKER_PREF("general.appname.override", AppNameOverrideChanged)
|
|
WORKER_PREF("general.appversion.override", AppVersionOverrideChanged)
|
|
WORKER_PREF("general.platform.override", PlatformOverrideChanged)
|
|
#ifdef JS_GC_ZEAL
|
|
WORKER_PREF("dom.workers.options.gcZeal", LoadGCZealOptions)
|
|
#endif
|
|
#undef WORKER_PREF
|
|
|
|
#ifdef JS_GC_ZEAL
|
|
NS_FAILED(Preferences::UnregisterCallback(
|
|
LoadGCZealOptions,
|
|
PREF_JS_OPTIONS_PREFIX PREF_GCZEAL)) ||
|
|
#endif
|
|
NS_FAILED(Preferences::UnregisterPrefixCallback(
|
|
LoadJSGCMemoryOptions,
|
|
PREF_JS_OPTIONS_PREFIX PREF_MEM_OPTIONS_PREFIX)) ||
|
|
NS_FAILED(Preferences::UnregisterPrefixCallback(
|
|
LoadJSGCMemoryOptions,
|
|
PREF_WORKERS_OPTIONS_PREFIX PREF_MEM_OPTIONS_PREFIX))) {
|
|
NS_WARNING("Failed to unregister pref callbacks!");
|
|
}
|
|
|
|
if (obs) {
|
|
if (NS_FAILED(obs->RemoveObserver(this, GC_REQUEST_OBSERVER_TOPIC))) {
|
|
NS_WARNING("Failed to unregister for GC request notifications!");
|
|
}
|
|
|
|
if (NS_FAILED(obs->RemoveObserver(this, CC_REQUEST_OBSERVER_TOPIC))) {
|
|
NS_WARNING("Failed to unregister for CC request notifications!");
|
|
}
|
|
|
|
if (NS_FAILED(obs->RemoveObserver(this,
|
|
MEMORY_PRESSURE_OBSERVER_TOPIC))) {
|
|
NS_WARNING("Failed to unregister for memory pressure notifications!");
|
|
}
|
|
|
|
if (NS_FAILED(obs->RemoveObserver(this,
|
|
NS_IOSERVICE_OFFLINE_STATUS_TOPIC))) {
|
|
NS_WARNING("Failed to unregister for offline notification event!");
|
|
}
|
|
obs->RemoveObserver(this, NS_XPCOM_SHUTDOWN_THREADS_OBSERVER_ID);
|
|
obs->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
|
|
mObserved = false;
|
|
}
|
|
}
|
|
|
|
nsLayoutStatics::Release();
|
|
}
|
|
|
|
void
|
|
RuntimeService::AddAllTopLevelWorkersToArray(nsTArray<WorkerPrivate*>& aWorkers)
|
|
{
|
|
for (auto iter = mDomainMap.Iter(); !iter.Done(); iter.Next()) {
|
|
|
|
WorkerDomainInfo* aData = iter.UserData();
|
|
|
|
#ifdef DEBUG
|
|
for (uint32_t index = 0; index < aData->mActiveWorkers.Length(); index++) {
|
|
MOZ_ASSERT(!aData->mActiveWorkers[index]->GetParent(),
|
|
"Shouldn't have a parent in this list!");
|
|
}
|
|
for (uint32_t index = 0; index < aData->mActiveServiceWorkers.Length(); index++) {
|
|
MOZ_ASSERT(!aData->mActiveServiceWorkers[index]->GetParent(),
|
|
"Shouldn't have a parent in this list!");
|
|
}
|
|
#endif
|
|
|
|
aWorkers.AppendElements(aData->mActiveWorkers);
|
|
aWorkers.AppendElements(aData->mActiveServiceWorkers);
|
|
|
|
// These might not be top-level workers...
|
|
for (uint32_t index = 0; index < aData->mQueuedWorkers.Length(); index++) {
|
|
WorkerPrivate* worker = aData->mQueuedWorkers[index];
|
|
if (!worker->GetParent()) {
|
|
aWorkers.AppendElement(worker);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
RuntimeService::GetWorkersForWindow(nsPIDOMWindowInner* aWindow,
|
|
nsTArray<WorkerPrivate*>& aWorkers)
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
nsTArray<WorkerPrivate*>* workers;
|
|
if (mWindowMap.Get(aWindow, &workers)) {
|
|
NS_ASSERTION(!workers->IsEmpty(), "Should have been removed!");
|
|
aWorkers.AppendElements(*workers);
|
|
}
|
|
else {
|
|
NS_ASSERTION(aWorkers.IsEmpty(), "Should be empty!");
|
|
}
|
|
}
|
|
|
|
void
|
|
RuntimeService::CancelWorkersForWindow(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
nsTArray<WorkerPrivate*> workers;
|
|
GetWorkersForWindow(aWindow, workers);
|
|
|
|
if (!workers.IsEmpty()) {
|
|
for (uint32_t index = 0; index < workers.Length(); index++) {
|
|
WorkerPrivate*& worker = workers[index];
|
|
|
|
if (worker->IsSharedWorker()) {
|
|
worker->CloseSharedWorkersForWindow(aWindow);
|
|
} else {
|
|
worker->Cancel();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
RuntimeService::FreezeWorkersForWindow(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
MOZ_ASSERT(aWindow);
|
|
|
|
nsTArray<WorkerPrivate*> workers;
|
|
GetWorkersForWindow(aWindow, workers);
|
|
|
|
for (uint32_t index = 0; index < workers.Length(); index++) {
|
|
workers[index]->Freeze(aWindow);
|
|
}
|
|
}
|
|
|
|
void
|
|
RuntimeService::ThawWorkersForWindow(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
MOZ_ASSERT(aWindow);
|
|
|
|
nsTArray<WorkerPrivate*> workers;
|
|
GetWorkersForWindow(aWindow, workers);
|
|
|
|
for (uint32_t index = 0; index < workers.Length(); index++) {
|
|
workers[index]->Thaw(aWindow);
|
|
}
|
|
}
|
|
|
|
void
|
|
RuntimeService::SuspendWorkersForWindow(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
MOZ_ASSERT(aWindow);
|
|
|
|
nsTArray<WorkerPrivate*> workers;
|
|
GetWorkersForWindow(aWindow, workers);
|
|
|
|
for (uint32_t index = 0; index < workers.Length(); index++) {
|
|
workers[index]->ParentWindowPaused();
|
|
}
|
|
}
|
|
|
|
void
|
|
RuntimeService::ResumeWorkersForWindow(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
MOZ_ASSERT(aWindow);
|
|
|
|
nsTArray<WorkerPrivate*> workers;
|
|
GetWorkersForWindow(aWindow, workers);
|
|
|
|
for (uint32_t index = 0; index < workers.Length(); index++) {
|
|
workers[index]->ParentWindowResumed();
|
|
}
|
|
}
|
|
|
|
void
|
|
RuntimeService::PropagateFirstPartyStorageAccessGranted(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
MOZ_ASSERT(aWindow);
|
|
MOZ_ASSERT(StaticPrefs::privacy_restrict3rdpartystorage_enabled());
|
|
|
|
nsTArray<WorkerPrivate*> workers;
|
|
GetWorkersForWindow(aWindow, workers);
|
|
|
|
for (uint32_t index = 0; index < workers.Length(); index++) {
|
|
workers[index]->PropagateFirstPartyStorageAccessGranted();
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
RuntimeService::CreateSharedWorker(const GlobalObject& aGlobal,
|
|
const nsAString& aScriptURL,
|
|
const nsAString& aName,
|
|
SharedWorker** aSharedWorker)
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aGlobal.GetAsSupports());
|
|
MOZ_ASSERT(window);
|
|
|
|
// If the window is blocked from accessing storage, do not allow it
|
|
// to connect to a SharedWorker. This would potentially allow it
|
|
// to communicate with other windows that do have storage access.
|
|
// Allow private browsing, however, as we handle that isolation
|
|
// via the principal.
|
|
auto storageAllowed = nsContentUtils::StorageAllowedForWindow(window);
|
|
if (storageAllowed != nsContentUtils::StorageAccess::eAllow &&
|
|
storageAllowed != nsContentUtils::StorageAccess::ePrivateBrowsing) {
|
|
return NS_ERROR_DOM_SECURITY_ERR;
|
|
}
|
|
|
|
// Assert that the principal private browsing state matches the
|
|
// StorageAccess value.
|
|
#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
|
|
if (storageAllowed == nsContentUtils::StorageAccess::ePrivateBrowsing) {
|
|
nsCOMPtr<nsIDocument> doc = window->GetExtantDoc();
|
|
nsCOMPtr<nsIPrincipal> principal = doc ? doc->NodePrincipal() : nullptr;
|
|
uint32_t privateBrowsingId = 0;
|
|
if (principal) {
|
|
MOZ_ALWAYS_SUCCEEDS(principal->GetPrivateBrowsingId(&privateBrowsingId));
|
|
}
|
|
MOZ_DIAGNOSTIC_ASSERT(privateBrowsingId != 0);
|
|
}
|
|
#endif // MOZ_DIAGNOSTIC_ASSERT_ENABLED
|
|
|
|
JSContext* cx = aGlobal.Context();
|
|
|
|
WorkerLoadInfo loadInfo;
|
|
nsresult rv = WorkerPrivate::GetLoadInfo(cx, window, nullptr, aScriptURL,
|
|
false,
|
|
WorkerPrivate::OverrideLoadGroup,
|
|
WorkerTypeShared, &loadInfo);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return CreateSharedWorkerFromLoadInfo(cx, &loadInfo, aScriptURL, aName,
|
|
aSharedWorker);
|
|
}
|
|
|
|
nsresult
|
|
RuntimeService::CreateSharedWorkerFromLoadInfo(JSContext* aCx,
|
|
WorkerLoadInfo* aLoadInfo,
|
|
const nsAString& aScriptURL,
|
|
const nsAString& aName,
|
|
SharedWorker** aSharedWorker)
|
|
{
|
|
AssertIsOnMainThread();
|
|
MOZ_ASSERT(aLoadInfo);
|
|
MOZ_ASSERT(aLoadInfo->mResolvedScriptURI);
|
|
|
|
RefPtr<WorkerPrivate> workerPrivate;
|
|
{
|
|
MutexAutoLock lock(mMutex);
|
|
|
|
nsCString scriptSpec;
|
|
nsresult rv = aLoadInfo->mResolvedScriptURI->GetSpec(scriptSpec);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
MOZ_DIAGNOSTIC_ASSERT(aLoadInfo->mPrincipal && aLoadInfo->mLoadingPrincipal);
|
|
|
|
WorkerDomainInfo* domainInfo;
|
|
if (mDomainMap.Get(aLoadInfo->mDomain, &domainInfo)) {
|
|
for (const UniquePtr<SharedWorkerInfo>& data : domainInfo->mSharedWorkerInfos) {
|
|
if (data->mScriptSpec == scriptSpec &&
|
|
data->mName == aName &&
|
|
// We want to be sure that the window's principal subsumes the
|
|
// SharedWorker's loading principal and vice versa.
|
|
aLoadInfo->mLoadingPrincipal->Subsumes(data->mWorkerPrivate->GetLoadingPrincipal()) &&
|
|
data->mWorkerPrivate->GetLoadingPrincipal()->Subsumes(aLoadInfo->mLoadingPrincipal)) {
|
|
workerPrivate = data->mWorkerPrivate;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Keep a reference to the window before spawning the worker. If the worker is
|
|
// a Shared/Service worker and the worker script loads and executes before
|
|
// the SharedWorker object itself is created before then WorkerScriptLoaded()
|
|
// will reset the loadInfo's window.
|
|
nsCOMPtr<nsPIDOMWindowInner> window = aLoadInfo->mWindow;
|
|
|
|
// shouldAttachToWorkerPrivate tracks whether our SharedWorker should actually
|
|
// get attached to the WorkerPrivate we're using. It will become false if the
|
|
// WorkerPrivate already exists and its secure context state doesn't match
|
|
// what we want for the new SharedWorker.
|
|
bool shouldAttachToWorkerPrivate = true;
|
|
bool created = false;
|
|
ErrorResult rv;
|
|
if (!workerPrivate) {
|
|
workerPrivate =
|
|
WorkerPrivate::Constructor(aCx, aScriptURL, false,
|
|
WorkerTypeShared, aName, VoidCString(),
|
|
aLoadInfo, rv);
|
|
NS_ENSURE_TRUE(workerPrivate, rv.StealNSResult());
|
|
|
|
created = true;
|
|
} else {
|
|
// Check whether the secure context state matches. The current realm
|
|
// of aCx is the realm of the SharedWorker constructor that was invoked,
|
|
// which is the realm of the document that will be hooked up to the worker,
|
|
// so that's what we want to check.
|
|
shouldAttachToWorkerPrivate =
|
|
workerPrivate->IsSecureContext() ==
|
|
JS::GetIsSecureContext(js::GetContextRealm(aCx));
|
|
|
|
// If we're attaching to an existing SharedWorker private, then we
|
|
// must update the overriden load group to account for our document's
|
|
// load group.
|
|
if (shouldAttachToWorkerPrivate) {
|
|
workerPrivate->UpdateOverridenLoadGroup(aLoadInfo->mLoadGroup);
|
|
}
|
|
}
|
|
|
|
// We don't actually care about this MessageChannel, but we use it to 'steal'
|
|
// its 2 connected ports.
|
|
RefPtr<MessageChannel> channel =
|
|
MessageChannel::Constructor(window->AsGlobal(), rv);
|
|
if (NS_WARN_IF(rv.Failed())) {
|
|
return rv.StealNSResult();
|
|
}
|
|
|
|
RefPtr<SharedWorker> sharedWorker = new SharedWorker(window, workerPrivate,
|
|
channel->Port1());
|
|
|
|
if (!shouldAttachToWorkerPrivate) {
|
|
// We're done here. Just queue up our error event and return our
|
|
// dead-on-arrival SharedWorker.
|
|
RefPtr<AsyncEventDispatcher> errorEvent =
|
|
new AsyncEventDispatcher(sharedWorker,
|
|
NS_LITERAL_STRING("error"),
|
|
CanBubble::eNo);
|
|
errorEvent->PostDOMEvent();
|
|
sharedWorker.forget(aSharedWorker);
|
|
return NS_OK;
|
|
}
|
|
|
|
if (!workerPrivate->RegisterSharedWorker(sharedWorker, channel->Port2())) {
|
|
NS_WARNING("Worker is unreachable, this shouldn't happen!");
|
|
sharedWorker->Close();
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// This is normally handled in RegisterWorker, but that wasn't called if the
|
|
// worker already existed.
|
|
if (!created) {
|
|
nsTArray<WorkerPrivate*>* windowArray;
|
|
if (!mWindowMap.Get(window, &windowArray)) {
|
|
windowArray = new nsTArray<WorkerPrivate*>(1);
|
|
mWindowMap.Put(window, windowArray);
|
|
}
|
|
|
|
if (!windowArray->Contains(workerPrivate)) {
|
|
windowArray->AppendElement(workerPrivate);
|
|
}
|
|
}
|
|
|
|
sharedWorker.forget(aSharedWorker);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
RuntimeService::ForgetSharedWorker(WorkerPrivate* aWorkerPrivate)
|
|
{
|
|
AssertIsOnMainThread();
|
|
MOZ_ASSERT(aWorkerPrivate);
|
|
MOZ_ASSERT(aWorkerPrivate->IsSharedWorker());
|
|
|
|
MutexAutoLock lock(mMutex);
|
|
|
|
WorkerDomainInfo* domainInfo;
|
|
if (mDomainMap.Get(aWorkerPrivate->Domain(), &domainInfo)) {
|
|
RemoveSharedWorker(domainInfo, aWorkerPrivate);
|
|
}
|
|
}
|
|
|
|
void
|
|
RuntimeService::NoteIdleThread(WorkerThread* aThread)
|
|
{
|
|
AssertIsOnMainThread();
|
|
MOZ_ASSERT(aThread);
|
|
|
|
bool shutdownThread = mShuttingDown;
|
|
bool scheduleTimer = false;
|
|
|
|
if (!shutdownThread) {
|
|
static TimeDuration timeout =
|
|
TimeDuration::FromSeconds(IDLE_THREAD_TIMEOUT_SEC);
|
|
|
|
TimeStamp expirationTime = TimeStamp::NowLoRes() + timeout;
|
|
|
|
MutexAutoLock lock(mMutex);
|
|
|
|
uint32_t previousIdleCount = mIdleThreadArray.Length();
|
|
|
|
if (previousIdleCount < MAX_IDLE_THREADS) {
|
|
IdleThreadInfo* info = mIdleThreadArray.AppendElement();
|
|
info->mThread = aThread;
|
|
info->mExpirationTime = expirationTime;
|
|
|
|
scheduleTimer = previousIdleCount == 0;
|
|
} else {
|
|
shutdownThread = true;
|
|
}
|
|
}
|
|
|
|
MOZ_ASSERT_IF(shutdownThread, !scheduleTimer);
|
|
MOZ_ASSERT_IF(scheduleTimer, !shutdownThread);
|
|
|
|
// Too many idle threads, just shut this one down.
|
|
if (shutdownThread) {
|
|
MOZ_ALWAYS_SUCCEEDS(aThread->Shutdown());
|
|
} else if (scheduleTimer) {
|
|
MOZ_ALWAYS_SUCCEEDS(
|
|
mIdleThreadTimer->InitWithNamedFuncCallback(ShutdownIdleThreads,
|
|
nullptr,
|
|
IDLE_THREAD_TIMEOUT_SEC * 1000,
|
|
nsITimer::TYPE_ONE_SHOT,
|
|
"RuntimeService::ShutdownIdleThreads"));
|
|
}
|
|
}
|
|
|
|
void
|
|
RuntimeService::UpdateAllWorkerContextOptions()
|
|
{
|
|
BROADCAST_ALL_WORKERS(UpdateContextOptions, sDefaultJSSettings.contextOptions);
|
|
}
|
|
|
|
void
|
|
RuntimeService::UpdateAppNameOverridePreference(const nsAString& aValue)
|
|
{
|
|
AssertIsOnMainThread();
|
|
mNavigatorProperties.mAppNameOverridden = aValue;
|
|
}
|
|
|
|
void
|
|
RuntimeService::UpdateAppVersionOverridePreference(const nsAString& aValue)
|
|
{
|
|
AssertIsOnMainThread();
|
|
mNavigatorProperties.mAppVersionOverridden = aValue;
|
|
}
|
|
|
|
void
|
|
RuntimeService::UpdatePlatformOverridePreference(const nsAString& aValue)
|
|
{
|
|
AssertIsOnMainThread();
|
|
mNavigatorProperties.mPlatformOverridden = aValue;
|
|
}
|
|
|
|
void
|
|
RuntimeService::UpdateAllWorkerLanguages(const nsTArray<nsString>& aLanguages)
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
mNavigatorProperties.mLanguages = aLanguages;
|
|
BROADCAST_ALL_WORKERS(UpdateLanguages, aLanguages);
|
|
}
|
|
|
|
void
|
|
RuntimeService::UpdateAllWorkerMemoryParameter(JSGCParamKey aKey,
|
|
uint32_t aValue)
|
|
{
|
|
BROADCAST_ALL_WORKERS(UpdateJSWorkerMemoryParameter, aKey, aValue);
|
|
}
|
|
|
|
#ifdef JS_GC_ZEAL
|
|
void
|
|
RuntimeService::UpdateAllWorkerGCZeal()
|
|
{
|
|
BROADCAST_ALL_WORKERS(UpdateGCZeal, sDefaultJSSettings.gcZeal,
|
|
sDefaultJSSettings.gcZealFrequency);
|
|
}
|
|
#endif
|
|
|
|
void
|
|
RuntimeService::GarbageCollectAllWorkers(bool aShrinking)
|
|
{
|
|
BROADCAST_ALL_WORKERS(GarbageCollect, aShrinking);
|
|
}
|
|
|
|
void
|
|
RuntimeService::CycleCollectAllWorkers()
|
|
{
|
|
BROADCAST_ALL_WORKERS(CycleCollect, /* dummy = */ false);
|
|
}
|
|
|
|
void
|
|
RuntimeService::SendOfflineStatusChangeEventToAllWorkers(bool aIsOffline)
|
|
{
|
|
BROADCAST_ALL_WORKERS(OfflineStatusChangeEvent, aIsOffline);
|
|
}
|
|
|
|
void
|
|
RuntimeService::MemoryPressureAllWorkers()
|
|
{
|
|
BROADCAST_ALL_WORKERS(MemoryPressure, /* dummy = */ false);
|
|
}
|
|
|
|
uint32_t
|
|
RuntimeService::ClampedHardwareConcurrency() const
|
|
{
|
|
// The Firefox Hardware Report says 70% of Firefox users have exactly 2 cores.
|
|
// When the resistFingerprinting pref is set, we want to blend into the crowd
|
|
// so spoof navigator.hardwareConcurrency = 2 to reduce user uniqueness.
|
|
if (MOZ_UNLIKELY(nsContentUtils::ShouldResistFingerprinting())) {
|
|
return 2;
|
|
}
|
|
|
|
// This needs to be atomic, because multiple workers, and even mainthread,
|
|
// could race to initialize it at once.
|
|
static Atomic<uint32_t> clampedHardwareConcurrency;
|
|
|
|
// No need to loop here: if compareExchange fails, that just means that some
|
|
// other worker has initialized numberOfProcessors, so we're good to go.
|
|
if (!clampedHardwareConcurrency) {
|
|
int32_t numberOfProcessors = PR_GetNumberOfProcessors();
|
|
if (numberOfProcessors <= 0) {
|
|
numberOfProcessors = 1; // Must be one there somewhere
|
|
}
|
|
uint32_t clampedValue = std::min(uint32_t(numberOfProcessors),
|
|
gMaxHardwareConcurrency);
|
|
Unused << clampedHardwareConcurrency.compareExchange(0, clampedValue);
|
|
}
|
|
|
|
return clampedHardwareConcurrency;
|
|
}
|
|
|
|
// nsISupports
|
|
NS_IMPL_ISUPPORTS(RuntimeService, nsIObserver)
|
|
|
|
// nsIObserver
|
|
NS_IMETHODIMP
|
|
RuntimeService::Observe(nsISupports* aSubject, const char* aTopic,
|
|
const char16_t* aData)
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
|
|
Shutdown();
|
|
return NS_OK;
|
|
}
|
|
if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_THREADS_OBSERVER_ID)) {
|
|
Cleanup();
|
|
return NS_OK;
|
|
}
|
|
if (!strcmp(aTopic, GC_REQUEST_OBSERVER_TOPIC)) {
|
|
GarbageCollectAllWorkers(/* shrinking = */ false);
|
|
return NS_OK;
|
|
}
|
|
if (!strcmp(aTopic, CC_REQUEST_OBSERVER_TOPIC)) {
|
|
CycleCollectAllWorkers();
|
|
return NS_OK;
|
|
}
|
|
if (!strcmp(aTopic, MEMORY_PRESSURE_OBSERVER_TOPIC)) {
|
|
GarbageCollectAllWorkers(/* shrinking = */ true);
|
|
CycleCollectAllWorkers();
|
|
MemoryPressureAllWorkers();
|
|
return NS_OK;
|
|
}
|
|
if (!strcmp(aTopic, NS_IOSERVICE_OFFLINE_STATUS_TOPIC)) {
|
|
SendOfflineStatusChangeEventToAllWorkers(NS_IsOffline());
|
|
return NS_OK;
|
|
}
|
|
|
|
MOZ_ASSERT_UNREACHABLE("Unknown observer topic!");
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
LogViolationDetailsRunnable::MainThreadRun()
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
nsIContentSecurityPolicy* csp = mWorkerPrivate->GetCSP();
|
|
if (csp) {
|
|
if (mWorkerPrivate->GetReportCSPViolations()) {
|
|
csp->LogViolationDetails(nsIContentSecurityPolicy::VIOLATION_TYPE_EVAL,
|
|
nullptr, // triggering element
|
|
mFileName, mScriptSample, mLineNum, mColumnNum,
|
|
EmptyString(), EmptyString());
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
WorkerThreadPrimaryRunnable::Run()
|
|
{
|
|
AUTO_PROFILER_LABEL_DYNAMIC_LOSSY_NSSTRING(
|
|
"WorkerThreadPrimaryRunnable::Run", OTHER, mWorkerPrivate->ScriptURL());
|
|
|
|
using mozilla::ipc::BackgroundChild;
|
|
|
|
// Note: GetOrCreateForCurrentThread() must be called prior to
|
|
// mWorkerPrivate->SetThread() in order to avoid accidentally consuming
|
|
// worker messages here.
|
|
bool ipcReady = true;
|
|
if (NS_WARN_IF(!BackgroundChild::GetOrCreateForCurrentThread())) {
|
|
// Let's report the error only after SetThread().
|
|
ipcReady = false;
|
|
}
|
|
|
|
class MOZ_STACK_CLASS SetThreadHelper final
|
|
{
|
|
// Raw pointer: this class is on the stack.
|
|
WorkerPrivate* mWorkerPrivate;
|
|
RefPtr<AbstractThread> mAbstractThread;
|
|
|
|
public:
|
|
SetThreadHelper(WorkerPrivate* aWorkerPrivate, WorkerThread* aThread)
|
|
: mWorkerPrivate(aWorkerPrivate)
|
|
, mAbstractThread(AbstractThread::CreateXPCOMThreadWrapper(NS_GetCurrentThread(), false))
|
|
{
|
|
MOZ_ASSERT(aWorkerPrivate);
|
|
MOZ_ASSERT(aThread);
|
|
|
|
mWorkerPrivate->SetThread(aThread);
|
|
}
|
|
|
|
~SetThreadHelper()
|
|
{
|
|
if (mWorkerPrivate) {
|
|
mWorkerPrivate->SetThread(nullptr);
|
|
}
|
|
}
|
|
|
|
void Nullify()
|
|
{
|
|
MOZ_ASSERT(mWorkerPrivate);
|
|
mWorkerPrivate->SetThread(nullptr);
|
|
mWorkerPrivate = nullptr;
|
|
}
|
|
};
|
|
|
|
SetThreadHelper threadHelper(mWorkerPrivate, mThread);
|
|
|
|
mWorkerPrivate->AssertIsOnWorkerThread();
|
|
|
|
if (!ipcReady) {
|
|
WorkerErrorReport::CreateAndDispatchGenericErrorRunnableToParent(mWorkerPrivate);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
{
|
|
nsCycleCollector_startup();
|
|
|
|
auto context = MakeUnique<WorkerJSContext>(mWorkerPrivate);
|
|
nsresult rv = context->Initialize(mParentRuntime);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
|
|
JSContext* cx = context->Context();
|
|
|
|
if (!InitJSContextForWorker(mWorkerPrivate, cx)) {
|
|
WorkerErrorReport::CreateAndDispatchGenericErrorRunnableToParent(mWorkerPrivate);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
{
|
|
PROFILER_SET_JS_CONTEXT(cx);
|
|
|
|
{
|
|
JSAutoRequest ar(cx);
|
|
|
|
mWorkerPrivate->DoRunLoop(cx);
|
|
// The AutoJSAPI in DoRunLoop should have reported any exceptions left
|
|
// on cx. Note that we still need the JSAutoRequest above because
|
|
// AutoJSAPI on workers does NOT enter a request!
|
|
MOZ_ASSERT(!JS_IsExceptionPending(cx));
|
|
}
|
|
|
|
BackgroundChild::CloseForCurrentThread();
|
|
|
|
PROFILER_CLEAR_JS_CONTEXT();
|
|
}
|
|
|
|
// There may still be runnables on the debugger event queue that hold a
|
|
// strong reference to the debugger global scope. These runnables are not
|
|
// visible to the cycle collector, so we need to make sure to clear the
|
|
// debugger event queue before we try to destroy the context. If we don't,
|
|
// the garbage collector will crash.
|
|
mWorkerPrivate->ClearDebuggerEventQueue();
|
|
|
|
// Perform a full GC. This will collect the main worker global and CC,
|
|
// which should break all cycles that touch JS.
|
|
JS_GC(cx);
|
|
|
|
// Before shutting down the cycle collector we need to do one more pass
|
|
// through the event loop to clean up any C++ objects that need deferred
|
|
// cleanup.
|
|
mWorkerPrivate->ClearMainEventQueue(WorkerPrivate::WorkerRan);
|
|
|
|
// Now WorkerJSContext goes out of scope and its destructor will shut
|
|
// down the cycle collector. This breaks any remaining cycles and collects
|
|
// any remaining C++ objects.
|
|
}
|
|
|
|
threadHelper.Nullify();
|
|
|
|
mWorkerPrivate->ScheduleDeletion(WorkerPrivate::WorkerRan);
|
|
|
|
// It is no longer safe to touch mWorkerPrivate.
|
|
mWorkerPrivate = nullptr;
|
|
|
|
// Now recycle this thread.
|
|
nsCOMPtr<nsIEventTarget> mainTarget = GetMainThreadEventTarget();
|
|
MOZ_ASSERT(mainTarget);
|
|
|
|
RefPtr<FinishedRunnable> finishedRunnable =
|
|
new FinishedRunnable(mThread.forget());
|
|
MOZ_ALWAYS_SUCCEEDS(mainTarget->Dispatch(finishedRunnable,
|
|
NS_DISPATCH_NORMAL));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
WorkerThreadPrimaryRunnable::FinishedRunnable::Run()
|
|
{
|
|
AssertIsOnMainThread();
|
|
|
|
RefPtr<WorkerThread> thread;
|
|
mThread.swap(thread);
|
|
|
|
RuntimeService* rts = RuntimeService::GetService();
|
|
if (rts) {
|
|
rts->NoteIdleThread(thread);
|
|
}
|
|
else if (thread->ShutdownRequired()) {
|
|
MOZ_ALWAYS_SUCCEEDS(thread->Shutdown());
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
} // workerinternals namespace
|
|
|
|
void
|
|
CancelWorkersForWindow(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
RuntimeService* runtime = RuntimeService::GetService();
|
|
if (runtime) {
|
|
runtime->CancelWorkersForWindow(aWindow);
|
|
}
|
|
}
|
|
|
|
void
|
|
FreezeWorkersForWindow(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
RuntimeService* runtime = RuntimeService::GetService();
|
|
if (runtime) {
|
|
runtime->FreezeWorkersForWindow(aWindow);
|
|
}
|
|
}
|
|
|
|
void
|
|
ThawWorkersForWindow(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
RuntimeService* runtime = RuntimeService::GetService();
|
|
if (runtime) {
|
|
runtime->ThawWorkersForWindow(aWindow);
|
|
}
|
|
}
|
|
|
|
void
|
|
SuspendWorkersForWindow(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
RuntimeService* runtime = RuntimeService::GetService();
|
|
if (runtime) {
|
|
runtime->SuspendWorkersForWindow(aWindow);
|
|
}
|
|
}
|
|
|
|
void
|
|
ResumeWorkersForWindow(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
RuntimeService* runtime = RuntimeService::GetService();
|
|
if (runtime) {
|
|
runtime->ResumeWorkersForWindow(aWindow);
|
|
}
|
|
}
|
|
|
|
void
|
|
PropagateFirstPartyStorageAccessGrantedToWorkers(nsPIDOMWindowInner* aWindow)
|
|
{
|
|
AssertIsOnMainThread();
|
|
MOZ_ASSERT(StaticPrefs::privacy_restrict3rdpartystorage_enabled());
|
|
|
|
RuntimeService* runtime = RuntimeService::GetService();
|
|
if (runtime) {
|
|
runtime->PropagateFirstPartyStorageAccessGranted(aWindow);
|
|
}
|
|
}
|
|
|
|
WorkerPrivate*
|
|
GetWorkerPrivateFromContext(JSContext* aCx)
|
|
{
|
|
MOZ_ASSERT(!NS_IsMainThread());
|
|
MOZ_ASSERT(aCx);
|
|
|
|
CycleCollectedJSContext* ccjscx = CycleCollectedJSContext::GetFor(aCx);
|
|
if (!ccjscx) {
|
|
return nullptr;
|
|
}
|
|
|
|
WorkerJSContext* workerjscx = ccjscx->GetAsWorkerJSContext();
|
|
// GetWorkerPrivateFromContext is called only for worker contexts. The
|
|
// context private is cleared early in ~CycleCollectedJSContext() and so
|
|
// GetFor() returns null above if called after ccjscx is no longer a
|
|
// WorkerJSContext.
|
|
MOZ_ASSERT(workerjscx);
|
|
return workerjscx->GetWorkerPrivate();
|
|
}
|
|
|
|
WorkerPrivate*
|
|
GetCurrentThreadWorkerPrivate()
|
|
{
|
|
MOZ_ASSERT(!NS_IsMainThread());
|
|
|
|
CycleCollectedJSContext* ccjscx = CycleCollectedJSContext::Get();
|
|
if (!ccjscx) {
|
|
return nullptr;
|
|
}
|
|
|
|
WorkerJSContext* workerjscx = ccjscx->GetAsWorkerJSContext();
|
|
// Although GetCurrentThreadWorkerPrivate() is called only for worker
|
|
// threads, the ccjscx will no longer be a WorkerJSContext if called from
|
|
// stable state events during ~CycleCollectedJSContext().
|
|
if (!workerjscx) {
|
|
return nullptr;
|
|
}
|
|
|
|
return workerjscx->GetWorkerPrivate();
|
|
}
|
|
|
|
bool
|
|
IsCurrentThreadRunningWorker()
|
|
{
|
|
return !NS_IsMainThread() && !!GetCurrentThreadWorkerPrivate();
|
|
}
|
|
|
|
bool
|
|
IsCurrentThreadRunningChromeWorker()
|
|
{
|
|
return GetCurrentThreadWorkerPrivate()->UsesSystemPrincipal();
|
|
}
|
|
|
|
JSContext*
|
|
GetCurrentWorkerThreadJSContext()
|
|
{
|
|
WorkerPrivate* wp = GetCurrentThreadWorkerPrivate();
|
|
if (!wp) {
|
|
return nullptr;
|
|
}
|
|
return wp->GetJSContext();
|
|
}
|
|
|
|
JSObject*
|
|
GetCurrentThreadWorkerGlobal()
|
|
{
|
|
WorkerPrivate* wp = GetCurrentThreadWorkerPrivate();
|
|
if (!wp) {
|
|
return nullptr;
|
|
}
|
|
WorkerGlobalScope* scope = wp->GlobalScope();
|
|
if (!scope) {
|
|
return nullptr;
|
|
}
|
|
return scope->GetGlobalJSObject();
|
|
}
|
|
|
|
} // dom namespace
|
|
} // mozilla namespace
|