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gecko/dom/workers/RuntimeService.cpp

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/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "RuntimeService.h"
#include "nsIChannel.h"
#include "nsIContentSecurityPolicy.h"
#include "nsIDocument.h"
#include "nsIDOMChromeWindow.h"
#include "nsIEffectiveTLDService.h"
#include "nsIObserverService.h"
#include "nsIPrincipal.h"
#include "nsIScriptContext.h"
#include "nsIScriptSecurityManager.h"
#include "nsISupportsPriority.h"
#include "nsITimer.h"
#include "nsIURI.h"
#include "nsPIDOMWindow.h"
#include <algorithm>
#include "GeckoProfiler.h"
#include "js/OldDebugAPI.h"
#include "jsfriendapi.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/CycleCollectedJSRuntime.h"
#include "mozilla/dom/asmjscache/AsmJSCache.h"
#include "mozilla/dom/AtomList.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/ErrorEventBinding.h"
#include "mozilla/dom/EventTargetBinding.h"
#include "mozilla/dom/MessageEventBinding.h"
#include "mozilla/dom/WorkerBinding.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/Navigator.h"
#include "nsContentUtils.h"
#include "nsCycleCollector.h"
#include "nsDOMJSUtils.h"
#include "nsISupportsImpl.h"
#include "nsLayoutStatics.h"
#include "nsNetUtil.h"
#include "nsServiceManagerUtils.h"
#include "nsThread.h"
#include "nsThreadUtils.h"
#include "nsXPCOM.h"
#include "nsXPCOMPrivate.h"
#include "OSFileConstants.h"
#include "xpcpublic.h"
#ifdef MOZ_NUWA_PROCESS
#include "ipc/Nuwa.h"
#endif
#ifdef DEBUG
#include "nsThreadManager.h"
#endif
#include "SharedWorker.h"
#include "WorkerPrivate.h"
#include "WorkerRunnable.h"
using namespace mozilla;
using namespace mozilla::dom;
USING_WORKERS_NAMESPACE
using mozilla::MutexAutoLock;
using mozilla::MutexAutoUnlock;
using mozilla::Preferences;
// The size of the worker runtime heaps in bytes. May be changed via pref.
#define WORKER_DEFAULT_RUNTIME_HEAPSIZE 32 * 1024 * 1024
// The size of the worker JS allocation threshold in MB. May be changed via pref.
#define WORKER_DEFAULT_ALLOCATION_THRESHOLD 30
// The C stack size. We use the same stack size on all platforms for
// consistency.
#define WORKER_STACK_SIZE 256 * sizeof(size_t) * 1024
// Half the size of the actual C stack, to be safe.
#define WORKER_CONTEXT_NATIVE_STACK_LIMIT 128 * sizeof(size_t) * 1024
// The maximum number of threads to use for workers, overridable via pref.
#define MAX_WORKERS_PER_DOMAIN 10
static_assert(MAX_WORKERS_PER_DOMAIN >= 1,
"We should allow at least one worker per domain.");
// The default number of seconds that close handlers will be allowed to run for
// content workers.
#define MAX_SCRIPT_RUN_TIME_SEC 10
// The number of seconds that idle threads can hang around before being killed.
#define IDLE_THREAD_TIMEOUT_SEC 30
// The maximum number of threads that can be idle at one time.
#define MAX_IDLE_THREADS 20
#define PREF_WORKERS_PREFIX "dom.workers."
#define PREF_WORKERS_MAX_PER_DOMAIN PREF_WORKERS_PREFIX "maxPerDomain"
#define PREF_MAX_SCRIPT_RUN_TIME_CONTENT "dom.max_script_run_time"
#define PREF_MAX_SCRIPT_RUN_TIME_CHROME "dom.max_chrome_script_run_time"
#define GC_REQUEST_OBSERVER_TOPIC "child-gc-request"
#define CC_REQUEST_OBSERVER_TOPIC "child-cc-request"
#define MEMORY_PRESSURE_OBSERVER_TOPIC "memory-pressure"
#define BROADCAST_ALL_WORKERS(_func, ...) \
PR_BEGIN_MACRO \
AssertIsOnMainThread(); \
\
nsAutoTArray<WorkerPrivate*, 100> workers; \
{ \
MutexAutoLock lock(mMutex); \
\
mDomainMap.EnumerateRead(AddAllTopLevelWorkersToArray, &workers); \
} \
\
if (!workers.IsEmpty()) { \
AutoSafeJSContext cx; \
JSAutoRequest ar(cx); \
for (uint32_t index = 0; index < workers.Length(); index++) { \
workers[index]-> _func (cx, __VA_ARGS__); \
} \
} \
PR_END_MACRO
// Prefixes for observing preference changes.
#define PREF_JS_OPTIONS_PREFIX "javascript.options."
#define PREF_WORKERS_OPTIONS_PREFIX PREF_WORKERS_PREFIX "options."
#define PREF_MEM_OPTIONS_PREFIX "mem."
#define PREF_GCZEAL "gcZeal"
#if !(defined(DEBUG) || defined(MOZ_ENABLE_JS_DUMP))
#define DUMP_CONTROLLED_BY_PREF 1
#define PREF_DOM_WINDOW_DUMP_ENABLED "browser.dom.window.dump.enabled"
#endif
#define PREF_WORKERS_LATEST_JS_VERSION "dom.workers.latestJSVersion"
namespace {
const uint32_t kNoIndex = uint32_t(-1);
const JS::ContextOptions kRequiredContextOptions =
JS::ContextOptions().setDontReportUncaught(true)
.setNoScriptRval(true);
uint32_t gMaxWorkersPerDomain = MAX_WORKERS_PER_DOMAIN;
// Does not hold an owning reference.
RuntimeService* gRuntimeService = nullptr;
// Only non-null during the call to Init.
RuntimeService* gRuntimeServiceDuringInit = nullptr;
enum {
ID_Worker = 0,
ID_ChromeWorker,
ID_Event,
ID_MessageEvent,
ID_ErrorEvent,
ID_COUNT
};
// These are jsids for the main runtime. Only touched on the main thread.
jsid gStringIDs[ID_COUNT] = { JSID_VOID };
const char* gStringChars[] = {
"Worker",
"ChromeWorker",
"Event",
"MessageEvent",
"ErrorEvent"
// XXX Don't care about ProgressEvent since it should never leak to the main
// thread.
};
static_assert(MOZ_ARRAY_LENGTH(gStringChars) == ID_COUNT,
"gStringChars should have the right length.");
class LiteralRebindingCString : public nsDependentCString
{
public:
template<int N>
void RebindLiteral(const char (&aStr)[N])
{
Rebind(aStr, N-1);
}
};
template <typename T>
struct PrefTraits;
template <>
struct PrefTraits<bool>
{
typedef bool PrefValueType;
static const PrefValueType kDefaultValue = false;
static inline PrefValueType
Get(const char* aPref)
{
AssertIsOnMainThread();
return Preferences::GetBool(aPref);
}
static inline bool
Exists(const char* aPref)
{
AssertIsOnMainThread();
return Preferences::GetType(aPref) == nsIPrefBranch::PREF_BOOL;
}
};
template <>
struct PrefTraits<int32_t>
{
typedef int32_t PrefValueType;
static inline PrefValueType
Get(const char* aPref)
{
AssertIsOnMainThread();
return Preferences::GetInt(aPref);
}
static inline bool
Exists(const char* aPref)
{
AssertIsOnMainThread();
return Preferences::GetType(aPref) == nsIPrefBranch::PREF_INT;
}
};
template <typename T>
T
GetWorkerPref(const nsACString& aPref,
const T aDefault = PrefTraits<T>::kDefaultValue)
{
AssertIsOnMainThread();
typedef PrefTraits<T> PrefHelper;
T result;
nsAutoCString prefName;
prefName.AssignLiteral(PREF_WORKERS_OPTIONS_PREFIX);
prefName.Append(aPref);
if (PrefHelper::Exists(prefName.get())) {
result = PrefHelper::Get(prefName.get());
}
else {
prefName.AssignLiteral(PREF_JS_OPTIONS_PREFIX);
prefName.Append(aPref);
if (PrefHelper::Exists(prefName.get())) {
result = PrefHelper::Get(prefName.get());
}
else {
result = aDefault;
}
}
return result;
}
// This function creates a key for a SharedWorker composed by "name|scriptSpec".
// If the name contains a '|', this will be replaced by '||'.
void
GenerateSharedWorkerKey(const nsACString& aScriptSpec, const nsACString& aName,
nsCString& aKey)
{
aKey.Truncate();
aKey.SetCapacity(aScriptSpec.Length() + aName.Length() + 1);
nsACString::const_iterator start, end;
aName.BeginReading(start);
aName.EndReading(end);
for (; start != end; ++start) {
if (*start == '|') {
aKey.AppendASCII("||");
} else {
aKey.Append(*start);
}
}
aKey.Append('|');
aKey.Append(aScriptSpec);
}
void
LoadRuntimeAndContextOptions(const char* aPrefName, void* /* aClosure */)
{
AssertIsOnMainThread();
RuntimeService* rts = RuntimeService::GetService();
if (!rts && !gRuntimeServiceDuringInit) {
// May be shutting down, just bail.
return;
}
const nsDependentCString prefName(aPrefName);
// Several other pref branches will get included here so bail out if there is
// another callback that will handle this change.
if (StringBeginsWith(prefName,
NS_LITERAL_CSTRING(PREF_JS_OPTIONS_PREFIX
PREF_MEM_OPTIONS_PREFIX)) ||
StringBeginsWith(prefName,
NS_LITERAL_CSTRING(PREF_WORKERS_OPTIONS_PREFIX
PREF_MEM_OPTIONS_PREFIX))) {
return;
}
#ifdef JS_GC_ZEAL
if (prefName.EqualsLiteral(PREF_JS_OPTIONS_PREFIX PREF_GCZEAL) ||
prefName.EqualsLiteral(PREF_WORKERS_OPTIONS_PREFIX PREF_GCZEAL)) {
return;
}
#endif
// Runtime options.
JS::RuntimeOptions runtimeOptions;
if (GetWorkerPref<bool>(NS_LITERAL_CSTRING("asmjs"))) {
runtimeOptions.setAsmJS(true);
}
if (GetWorkerPref<bool>(NS_LITERAL_CSTRING("baselinejit"))) {
runtimeOptions.setBaseline(true);
}
if (GetWorkerPref<bool>(NS_LITERAL_CSTRING("ion"))) {
runtimeOptions.setIon(true);
}
// Common options.
JS::ContextOptions commonContextOptions = kRequiredContextOptions;
if (GetWorkerPref<bool>(NS_LITERAL_CSTRING("strict"))) {
commonContextOptions.setExtraWarnings(true);
}
if (GetWorkerPref<bool>(NS_LITERAL_CSTRING("werror"))) {
commonContextOptions.setWerror(true);
}
// Content options.
JS::ContextOptions contentContextOptions = commonContextOptions;
// Chrome options.
JS::ContextOptions chromeContextOptions = commonContextOptions;
#ifdef DEBUG
if (GetWorkerPref<bool>(NS_LITERAL_CSTRING("strict.debug"))) {
chromeContextOptions.setExtraWarnings(true);
}
#endif
RuntimeService::SetDefaultRuntimeAndContextOptions(runtimeOptions,
contentContextOptions,
chromeContextOptions);
if (rts) {
rts->UpdateAllWorkerRuntimeAndContextOptions();
}
}
#ifdef JS_GC_ZEAL
void
LoadGCZealOptions(const char* /* aPrefName */, void* /* aClosure */)
{
AssertIsOnMainThread();
RuntimeService* rts = RuntimeService::GetService();
if (!rts && !gRuntimeServiceDuringInit) {
// May be shutting down, just bail.
return;
}
int32_t gczeal = GetWorkerPref<int32_t>(NS_LITERAL_CSTRING(PREF_GCZEAL), -1);
if (gczeal < 0) {
gczeal = 0;
}
int32_t frequency =
GetWorkerPref<int32_t>(NS_LITERAL_CSTRING("gcZeal.frequency"), -1);
if (frequency < 0) {
frequency = JS_DEFAULT_ZEAL_FREQ;
}
RuntimeService::SetDefaultGCZeal(uint8_t(gczeal), uint32_t(frequency));
if (rts) {
rts->UpdateAllWorkerGCZeal();
}
}
#endif
void
UpdateCommonJSGCMemoryOption(RuntimeService* aRuntimeService,
const nsACString& aPrefName, JSGCParamKey aKey)
{
AssertIsOnMainThread();
NS_ASSERTION(!aPrefName.IsEmpty(), "Empty pref name!");
int32_t prefValue = GetWorkerPref(aPrefName, -1);
uint32_t value =
(prefValue < 0 || prefValue >= 10000) ? 0 : uint32_t(prefValue);
RuntimeService::SetDefaultJSGCSettings(aKey, value);
if (aRuntimeService) {
aRuntimeService->UpdateAllWorkerMemoryParameter(aKey, value);
}
}
void
UpdatOtherJSGCMemoryOption(RuntimeService* aRuntimeService,
JSGCParamKey aKey, uint32_t aValue)
{
AssertIsOnMainThread();
RuntimeService::SetDefaultJSGCSettings(aKey, aValue);
if (aRuntimeService) {
aRuntimeService->UpdateAllWorkerMemoryParameter(aKey, aValue);
}
}
void
LoadJSGCMemoryOptions(const char* aPrefName, void* /* aClosure */)
{
AssertIsOnMainThread();
RuntimeService* rts = RuntimeService::GetService();
if (!rts && !gRuntimeServiceDuringInit) {
// May be shutting down, just bail.
return;
}
NS_NAMED_LITERAL_CSTRING(jsPrefix, PREF_JS_OPTIONS_PREFIX);
NS_NAMED_LITERAL_CSTRING(workersPrefix, PREF_WORKERS_OPTIONS_PREFIX);
const nsDependentCString fullPrefName(aPrefName);
// Pull out the string that actually distinguishes the parameter we need to
// change.
nsDependentCSubstring memPrefName;
if (StringBeginsWith(fullPrefName, jsPrefix)) {
memPrefName.Rebind(fullPrefName, jsPrefix.Length());
}
else if (StringBeginsWith(fullPrefName, workersPrefix)) {
memPrefName.Rebind(fullPrefName, workersPrefix.Length());
}
else {
NS_ERROR("Unknown pref name!");
return;
}
#ifdef DEBUG
// During Init() we get called back with a branch string here, so there should
// be no just a "mem." pref here.
if (!rts) {
NS_ASSERTION(memPrefName.EqualsLiteral(PREF_MEM_OPTIONS_PREFIX), "Huh?!");
}
#endif
// If we're running in Init() then do this for every pref we care about.
// Otherwise we just want to update the parameter that changed.
for (uint32_t index = rts ? JSSettings::kGCSettingsArraySize - 1 : 0;
index < JSSettings::kGCSettingsArraySize;
index++) {
LiteralRebindingCString matchName;
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "max");
if (memPrefName == matchName || (!rts && index == 0)) {
int32_t prefValue = GetWorkerPref(matchName, -1);
uint32_t value = (prefValue <= 0 || prefValue >= 0x1000) ?
uint32_t(-1) :
uint32_t(prefValue) * 1024 * 1024;
UpdatOtherJSGCMemoryOption(rts, JSGC_MAX_BYTES, value);
continue;
}
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "high_water_mark");
if (memPrefName == matchName || (!rts && index == 1)) {
int32_t prefValue = GetWorkerPref(matchName, 128);
UpdatOtherJSGCMemoryOption(rts, JSGC_MAX_MALLOC_BYTES,
uint32_t(prefValue) * 1024 * 1024);
continue;
}
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
"gc_high_frequency_time_limit_ms");
if (memPrefName == matchName || (!rts && index == 2)) {
UpdateCommonJSGCMemoryOption(rts, matchName,
JSGC_HIGH_FREQUENCY_TIME_LIMIT);
continue;
}
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
"gc_low_frequency_heap_growth");
if (memPrefName == matchName || (!rts && index == 3)) {
UpdateCommonJSGCMemoryOption(rts, matchName,
JSGC_LOW_FREQUENCY_HEAP_GROWTH);
continue;
}
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
"gc_high_frequency_heap_growth_min");
if (memPrefName == matchName || (!rts && index == 4)) {
UpdateCommonJSGCMemoryOption(rts, matchName,
JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN);
continue;
}
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
"gc_high_frequency_heap_growth_max");
if (memPrefName == matchName || (!rts && index == 5)) {
UpdateCommonJSGCMemoryOption(rts, matchName,
JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX);
continue;
}
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
"gc_high_frequency_low_limit_mb");
if (memPrefName == matchName || (!rts && index == 6)) {
UpdateCommonJSGCMemoryOption(rts, matchName,
JSGC_HIGH_FREQUENCY_LOW_LIMIT);
continue;
}
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
"gc_high_frequency_high_limit_mb");
if (memPrefName == matchName || (!rts && index == 7)) {
UpdateCommonJSGCMemoryOption(rts, matchName,
JSGC_HIGH_FREQUENCY_HIGH_LIMIT);
continue;
}
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX
"gc_allocation_threshold_mb");
if (memPrefName == matchName || (!rts && index == 8)) {
UpdateCommonJSGCMemoryOption(rts, matchName, JSGC_ALLOCATION_THRESHOLD);
continue;
}
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "gc_incremental_slice_ms");
if (memPrefName == matchName || (!rts && index == 9)) {
int32_t prefValue = GetWorkerPref(matchName, -1);
uint32_t value =
(prefValue <= 0 || prefValue >= 100000) ? 0 : uint32_t(prefValue);
UpdatOtherJSGCMemoryOption(rts, JSGC_SLICE_TIME_BUDGET, value);
continue;
}
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "gc_dynamic_heap_growth");
if (memPrefName == matchName || (!rts && index == 10)) {
bool prefValue = GetWorkerPref(matchName, false);
UpdatOtherJSGCMemoryOption(rts, JSGC_DYNAMIC_HEAP_GROWTH,
prefValue ? 0 : 1);
continue;
}
matchName.RebindLiteral(PREF_MEM_OPTIONS_PREFIX "gc_dynamic_mark_slice");
if (memPrefName == matchName || (!rts && index == 11)) {
bool prefValue = GetWorkerPref(matchName, false);
UpdatOtherJSGCMemoryOption(rts, JSGC_DYNAMIC_MARK_SLICE,
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
}
}
void
ErrorReporter(JSContext* aCx, const char* aMessage, JSErrorReport* aReport)
{
WorkerPrivate* worker = GetWorkerPrivateFromContext(aCx);
MOZ_ASSERT(worker);
return worker->ReportError(aCx, aMessage, aReport);
}
bool
InterruptCallback(JSContext* aCx)
{
WorkerPrivate* worker = GetWorkerPrivateFromContext(aCx);
MOZ_ASSERT(worker);
// Now is a good time to turn on profiling if it's pending.
profiler_js_operation_callback();
return worker->InterruptCallback(aCx);
}
class LogViolationDetailsRunnable MOZ_FINAL : public nsRunnable
{
WorkerPrivate* mWorkerPrivate;
nsCOMPtr<nsIEventTarget> mSyncLoopTarget;
nsString mFileName;
uint32_t mLineNum;
public:
LogViolationDetailsRunnable(WorkerPrivate* aWorker,
const nsString& aFileName,
uint32_t aLineNum)
: mWorkerPrivate(aWorker), mFileName(aFileName), mLineNum(aLineNum)
{
MOZ_ASSERT(aWorker);
}
NS_DECL_ISUPPORTS_INHERITED
bool
Dispatch(JSContext* aCx)
{
AutoSyncLoopHolder syncLoop(mWorkerPrivate);
mSyncLoopTarget = syncLoop.EventTarget();
MOZ_ASSERT(mSyncLoopTarget);
if (NS_FAILED(NS_DispatchToMainThread(this, NS_DISPATCH_NORMAL))) {
JS_ReportError(aCx, "Failed to dispatch to main thread!");
return false;
}
return syncLoop.Run();
}
private:
NS_DECL_NSIRUNNABLE
};
bool
ContentSecurityPolicyAllows(JSContext* aCx)
{
WorkerPrivate* worker = GetWorkerPrivateFromContext(aCx);
worker->AssertIsOnWorkerThread();
if (worker->GetReportCSPViolations()) {
nsString fileName;
uint32_t lineNum = 0;
JS::AutoFilename file;
if (JS::DescribeScriptedCaller(aCx, &file, &lineNum) && file.get()) {
fileName = NS_ConvertUTF8toUTF16(file.get());
} else {
JS_ReportPendingException(aCx);
}
nsRefPtr<LogViolationDetailsRunnable> runnable =
new LogViolationDetailsRunnable(worker, fileName, lineNum);
if (!runnable->Dispatch(aCx)) {
JS_ReportPendingException(aCx);
}
}
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 jschar* aBegin,
const jschar* 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 bool
AsmJSCacheOpenEntryForWrite(JS::Handle<JSObject*> aGlobal,
bool aInstalled,
const jschar* aBegin,
const jschar* aEnd,
size_t aSize,
uint8_t** aMemory,
intptr_t* aHandle)
{
nsIPrincipal* principal = GetPrincipalForAsmJSCacheOp();
if (!principal) {
return false;
}
return asmjscache::OpenEntryForWrite(principal, aInstalled, aBegin, aEnd,
aSize, aMemory, aHandle);
}
struct WorkerThreadRuntimePrivate : public PerThreadAtomCache
{
WorkerPrivate* mWorkerPrivate;
};
JSContext*
CreateJSContextForWorker(WorkerPrivate* aWorkerPrivate, JSRuntime* aRuntime)
{
aWorkerPrivate->AssertIsOnWorkerThread();
NS_ASSERTION(!aWorkerPrivate->GetJSContext(), "Already has a context!");
JSSettings settings;
aWorkerPrivate->CopyJSSettings(settings);
JS::RuntimeOptionsRef(aRuntime) = settings.runtimeOptions;
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.IsSet()) {
NS_ASSERTION(setting.value, "Can't handle 0 values!");
JS_SetGCParameter(aRuntime, setting.key, setting.value);
}
}
JS_SetIsWorkerRuntime(aRuntime);
JS_SetNativeStackQuota(aRuntime, WORKER_CONTEXT_NATIVE_STACK_LIMIT);
// Security policy:
static JSSecurityCallbacks securityCallbacks = {
ContentSecurityPolicyAllows
};
JS_SetSecurityCallbacks(aRuntime, &securityCallbacks);
// DOM helpers:
static js::DOMCallbacks DOMCallbacks = {
InstanceClassHasProtoAtDepth
};
SetDOMCallbacks(aRuntime, &DOMCallbacks);
// Set up the asm.js cache callbacks
static JS::AsmJSCacheOps asmJSCacheOps = {
AsmJSCacheOpenEntryForRead,
asmjscache::CloseEntryForRead,
AsmJSCacheOpenEntryForWrite,
asmjscache::CloseEntryForWrite,
asmjscache::GetBuildId
};
JS::SetAsmJSCacheOps(aRuntime, &asmJSCacheOps);
JSContext* workerCx = JS_NewContext(aRuntime, 0);
if (!workerCx) {
NS_WARNING("Could not create new context!");
return nullptr;
}
auto rtPrivate = new WorkerThreadRuntimePrivate();
memset(rtPrivate, 0, sizeof(WorkerThreadRuntimePrivate));
rtPrivate->mWorkerPrivate = aWorkerPrivate;
JS_SetRuntimePrivate(aRuntime, rtPrivate);
JS_SetErrorReporter(workerCx, ErrorReporter);
JS_SetInterruptCallback(aRuntime, InterruptCallback);
js::SetCTypesActivityCallback(aRuntime, CTypesActivityCallback);
JS::ContextOptionsRef(workerCx) =
aWorkerPrivate->IsChromeWorker() ? settings.chrome.contextOptions
: settings.content.contextOptions;
#ifdef JS_GC_ZEAL
JS_SetGCZeal(workerCx, settings.gcZeal, settings.gcZealFrequency);
#endif
return workerCx;
}
class WorkerJSRuntime : public mozilla::CycleCollectedJSRuntime
{
public:
// The heap size passed here doesn't matter, we will change it later in the
// call to JS_SetGCParameter inside CreateJSContextForWorker.
WorkerJSRuntime(JSRuntime* aParentRuntime, WorkerPrivate* aWorkerPrivate)
: CycleCollectedJSRuntime(aParentRuntime,
WORKER_DEFAULT_RUNTIME_HEAPSIZE,
JS_NO_HELPER_THREADS),
mWorkerPrivate(aWorkerPrivate)
{
}
~WorkerJSRuntime()
{
auto rtPrivate = static_cast<WorkerThreadRuntimePrivate*>(JS_GetRuntimePrivate(Runtime()));
delete rtPrivate;
JS_SetRuntimePrivate(Runtime(), nullptr);
// 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;
}
virtual void
PrepareForForgetSkippable() MOZ_OVERRIDE
{
}
virtual void
BeginCycleCollectionCallback() MOZ_OVERRIDE
{
}
virtual void
EndCycleCollectionCallback(CycleCollectorResults &aResults) MOZ_OVERRIDE
{
}
void
DispatchDeferredDeletion(bool aContinuation) MOZ_OVERRIDE
{
MOZ_ASSERT(!aContinuation);
// Do it immediately, no need for asynchronous behavior here.
nsCycleCollector_doDeferredDeletion();
}
virtual void CustomGCCallback(JSGCStatus aStatus) MOZ_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;
};
class WorkerThreadPrimaryRunnable MOZ_FINAL : public nsRunnable
{
WorkerPrivate* mWorkerPrivate;
nsRefPtr<RuntimeService::WorkerThread> mThread;
JSRuntime* mParentRuntime;
class FinishedRunnable MOZ_FINAL : public nsRunnable
{
nsRefPtr<RuntimeService::WorkerThread> mThread;
public:
FinishedRunnable(already_AddRefed<RuntimeService::WorkerThread> aThread)
: mThread(aThread)
{
MOZ_ASSERT(mThread);
}
NS_DECL_ISUPPORTS_INHERITED
private:
~FinishedRunnable()
{ }
NS_DECL_NSIRUNNABLE
};
public:
WorkerThreadPrimaryRunnable(WorkerPrivate* aWorkerPrivate,
RuntimeService::WorkerThread* aThread,
JSRuntime* aParentRuntime)
: mWorkerPrivate(aWorkerPrivate), mThread(aThread), mParentRuntime(aParentRuntime)
{
MOZ_ASSERT(aWorkerPrivate);
MOZ_ASSERT(aThread);
}
NS_DECL_ISUPPORTS_INHERITED
private:
~WorkerThreadPrimaryRunnable()
{ }
NS_DECL_NSIRUNNABLE
};
class WorkerTaskRunnable MOZ_FINAL : public WorkerRunnable
{
nsRefPtr<WorkerTask> mTask;
public:
WorkerTaskRunnable(WorkerPrivate* aWorkerPrivate, WorkerTask* aTask)
: WorkerRunnable(aWorkerPrivate, WorkerThreadUnchangedBusyCount), mTask(aTask)
{
MOZ_ASSERT(aTask);
}
private:
virtual bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
// May be called on any thread!
return true;
}
virtual void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult) MOZ_OVERRIDE
{
// May be called on any thread!
}
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) MOZ_OVERRIDE
{
return mTask->RunTask(aCx);
}
};
} /* anonymous namespace */
class RuntimeService::WorkerThread MOZ_FINAL : public nsThread
{
class Observer MOZ_FINAL : public nsIThreadObserver
{
WorkerPrivate* mWorkerPrivate;
public:
Observer(WorkerPrivate* aWorkerPrivate)
: mWorkerPrivate(aWorkerPrivate)
{
MOZ_ASSERT(aWorkerPrivate);
aWorkerPrivate->AssertIsOnWorkerThread();
}
NS_DECL_THREADSAFE_ISUPPORTS
private:
~Observer()
{
mWorkerPrivate->AssertIsOnWorkerThread();
}
NS_DECL_NSITHREADOBSERVER
};
WorkerPrivate* mWorkerPrivate;
nsRefPtr<Observer> mObserver;
#ifdef DEBUG
// Protected by nsThread::mLock.
bool mAcceptingNonWorkerRunnables;
#endif
public:
static already_AddRefed<WorkerThread>
Create();
void
SetWorker(WorkerPrivate* aWorkerPrivate);
NS_DECL_ISUPPORTS_INHERITED
NS_IMETHOD
Dispatch(nsIRunnable* aRunnable, uint32_t aFlags) MOZ_OVERRIDE;
#ifdef DEBUG
bool
IsAcceptingNonWorkerRunnables()
{
MutexAutoLock lock(mLock);
return mAcceptingNonWorkerRunnables;
}
void
SetAcceptingNonWorkerRunnables(bool aAcceptingNonWorkerRunnables)
{
MutexAutoLock lock(mLock);
mAcceptingNonWorkerRunnables = aAcceptingNonWorkerRunnables;
}
#endif
private:
WorkerThread()
: nsThread(nsThread::NOT_MAIN_THREAD, WORKER_STACK_SIZE),
mWorkerPrivate(nullptr)
#ifdef DEBUG
, mAcceptingNonWorkerRunnables(true)
#endif
{ }
~WorkerThread()
{ }
};
BEGIN_WORKERS_NAMESPACE
// Entry point for main thread non-window globals.
bool
ResolveWorkerClasses(JSContext* aCx, JS::Handle<JSObject*> aObj, JS::Handle<jsid> aId,
JS::MutableHandle<JSObject*> aObjp)
{
AssertIsOnMainThread();
MOZ_ASSERT(nsContentUtils::IsCallerChrome());
// Make sure our strings are interned.
if (JSID_IS_VOID(gStringIDs[0])) {
for (uint32_t i = 0; i < ID_COUNT; i++) {
JSString* str = JS_InternString(aCx, gStringChars[i]);
if (!str) {
while (i) {
gStringIDs[--i] = JSID_VOID;
}
return false;
}
gStringIDs[i] = INTERNED_STRING_TO_JSID(aCx, str);
}
}
bool shouldResolve = false;
for (uint32_t i = 0; i < ID_COUNT; i++) {
if (gStringIDs[i] == aId) {
shouldResolve = true;
break;
}
}
if (!shouldResolve) {
aObjp.set(nullptr);
return true;
}
if (!WorkerBinding::GetConstructorObject(aCx, aObj) ||
!ChromeWorkerBinding::GetConstructorObject(aCx, aObj) ||
!ErrorEventBinding::GetConstructorObject(aCx, aObj) ||
!MessageEventBinding::GetConstructorObject(aCx, aObj)) {
return false;
}
aObjp.set(aObj);
return true;
}
void
CancelWorkersForWindow(nsPIDOMWindow* aWindow)
{
AssertIsOnMainThread();
RuntimeService* runtime = RuntimeService::GetService();
if (runtime) {
runtime->CancelWorkersForWindow(aWindow);
}
}
void
SuspendWorkersForWindow(nsPIDOMWindow* aWindow)
{
AssertIsOnMainThread();
RuntimeService* runtime = RuntimeService::GetService();
if (runtime) {
runtime->SuspendWorkersForWindow(aWindow);
}
}
void
ResumeWorkersForWindow(nsPIDOMWindow* aWindow)
{
AssertIsOnMainThread();
RuntimeService* runtime = RuntimeService::GetService();
if (runtime) {
runtime->ResumeWorkersForWindow(aWindow);
}
}
WorkerCrossThreadDispatcher::WorkerCrossThreadDispatcher(
WorkerPrivate* aWorkerPrivate)
: mMutex("WorkerCrossThreadDispatcher::mMutex"),
mWorkerPrivate(aWorkerPrivate)
{
MOZ_ASSERT(aWorkerPrivate);
}
bool
WorkerCrossThreadDispatcher::PostTask(WorkerTask* aTask)
{
MOZ_ASSERT(aTask);
MutexAutoLock lock(mMutex);
if (!mWorkerPrivate) {
NS_WARNING("Posted a task to a WorkerCrossThreadDispatcher that is no "
"longer accepting tasks!");
return false;
}
nsRefPtr<WorkerTaskRunnable> runnable =
new WorkerTaskRunnable(mWorkerPrivate, aTask);
return runnable->Dispatch(nullptr);
}
WorkerPrivate*
GetWorkerPrivateFromContext(JSContext* aCx)
{
MOZ_ASSERT(!NS_IsMainThread());
MOZ_ASSERT(aCx);
JSRuntime* rt = JS_GetRuntime(aCx);
MOZ_ASSERT(rt);
void* rtPrivate = JS_GetRuntimePrivate(rt);
MOZ_ASSERT(rtPrivate);
return static_cast<WorkerThreadRuntimePrivate*>(rtPrivate)->mWorkerPrivate;
}
WorkerPrivate*
GetCurrentThreadWorkerPrivate()
{
MOZ_ASSERT(!NS_IsMainThread());
CycleCollectedJSRuntime* ccrt = CycleCollectedJSRuntime::Get();
if (!ccrt) {
return nullptr;
}
JSRuntime* rt = ccrt->Runtime();
MOZ_ASSERT(rt);
void* rtPrivate = JS_GetRuntimePrivate(rt);
MOZ_ASSERT(rtPrivate);
return static_cast<WorkerThreadRuntimePrivate*>(rtPrivate)->mWorkerPrivate;
}
bool
IsCurrentThreadRunningChromeWorker()
{
return GetCurrentThreadWorkerPrivate()->UsesSystemPrincipal();
}
JSContext*
GetCurrentThreadJSContext()
{
return GetCurrentThreadWorkerPrivate()->GetJSContext();
}
END_WORKERS_NAMESPACE
// This is only touched on the main thread. Initialized in Init() below.
JSSettings RuntimeService::sDefaultJSSettings;
bool RuntimeService::sDefaultPreferences[WORKERPREF_COUNT] = { false };
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) {
nsRefPtr<RuntimeService> service = new RuntimeService();
if (NS_FAILED(service->Init())) {
NS_WARNING("Failed to initialize!");
service->Cleanup();
return nullptr;
}
// The observer service now owns us until shutdown.
gRuntimeService = service;
}
return gRuntimeService;
}
// static
RuntimeService*
RuntimeService::GetService()
{
return gRuntimeService;
}
bool
RuntimeService::RegisterWorker(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
aWorkerPrivate->AssertIsOnParentThread();
WorkerPrivate* parent = aWorkerPrivate->GetParent();
if (!parent) {
AssertIsOnMainThread();
if (mShuttingDown) {
JS_ReportError(aCx, "Cannot create worker during shutdown!");
return false;
}
}
bool isSharedWorker = aWorkerPrivate->IsSharedWorker();
const nsCString& sharedWorkerName = aWorkerPrivate->SharedWorkerName();
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?!");
xpc::Throw(aCx, rv);
return false;
}
NS_ASSERTION(!sharedWorkerScriptSpec.IsEmpty(), "Empty spec!");
}
const nsCString& domain = aWorkerPrivate->Domain();
WorkerDomainInfo* domainInfo;
bool queued = false;
{
MutexAutoLock lock(mMutex);
if (!mDomainMap.Get(domain, &domainInfo)) {
NS_ASSERTION(!parent, "Shouldn't have a parent here!");
domainInfo = new WorkerDomainInfo();
domainInfo->mDomain = domain;
mDomainMap.Put(domain, domainInfo);
}
queued = gMaxWorkersPerDomain &&
domainInfo->ActiveWorkerCount() >= gMaxWorkersPerDomain &&
!domain.IsEmpty();
if (queued) {
domainInfo->mQueuedWorkers.AppendElement(aWorkerPrivate);
}
else if (parent) {
domainInfo->mChildWorkerCount++;
}
else {
domainInfo->mActiveWorkers.AppendElement(aWorkerPrivate);
}
if (isSharedWorker) {
nsAutoCString key;
GenerateSharedWorkerKey(sharedWorkerScriptSpec, sharedWorkerName, key);
MOZ_ASSERT(!domainInfo->mSharedWorkerInfos.Get(key));
SharedWorkerInfo* sharedWorkerInfo =
new SharedWorkerInfo(aWorkerPrivate, sharedWorkerScriptSpec,
sharedWorkerName);
domainInfo->mSharedWorkerInfos.Put(key, sharedWorkerInfo);
}
}
// From here on out we must call UnregisterWorker if something fails!
if (parent) {
if (!parent->AddChildWorker(aCx, aWorkerPrivate)) {
UnregisterWorker(aCx, aWorkerPrivate);
return false;
}
}
else {
if (!mNavigatorPropertiesLoaded) {
NS_GetNavigatorAppName(mNavigatorProperties.mAppName);
if (NS_FAILED(NS_GetNavigatorAppVersion(mNavigatorProperties.mAppVersion)) ||
NS_FAILED(NS_GetNavigatorPlatform(mNavigatorProperties.mPlatform)) ||
NS_FAILED(NS_GetNavigatorUserAgent(mNavigatorProperties.mUserAgent))) {
JS_ReportError(aCx, "Failed to load navigator strings!");
UnregisterWorker(aCx, aWorkerPrivate);
return false;
}
mNavigatorPropertiesLoaded = true;
}
nsPIDOMWindow* window = aWorkerPrivate->GetWindow();
nsTArray<WorkerPrivate*>* windowArray;
if (!mWindowMap.Get(window, &windowArray)) {
windowArray = new nsTArray<WorkerPrivate*>(1);
mWindowMap.Put(window, windowArray);
}
if (!windowArray->Contains(aWorkerPrivate)) {
windowArray->AppendElement(aWorkerPrivate);
} else {
MOZ_ASSERT(aWorkerPrivate->IsSharedWorker());
}
}
if (!queued && !ScheduleWorker(aCx, aWorkerPrivate)) {
return false;
}
return true;
}
void
RuntimeService::UnregisterWorker(JSContext* aCx, 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) {
NS_ASSERTION(domainInfo->mChildWorkerCount, "Must be non-zero!");
domainInfo->mChildWorkerCount--;
}
else {
NS_ASSERTION(domainInfo->mActiveWorkers.Contains(aWorkerPrivate),
"Don't know about this worker!");
domainInfo->mActiveWorkers.RemoveElement(aWorkerPrivate);
}
if (aWorkerPrivate->IsSharedWorker()) {
MatchSharedWorkerInfo match(aWorkerPrivate);
domainInfo->mSharedWorkerInfos.EnumerateRead(FindSharedWorkerInfo,
&match);
if (match.mSharedWorkerInfo) {
nsAutoCString key;
GenerateSharedWorkerKey(match.mSharedWorkerInfo->mScriptSpec,
match.mSharedWorkerInfo->mName, key);
domainInfo->mSharedWorkerInfos.Remove(key);
}
}
// 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 {
domainInfo->mActiveWorkers.AppendElement(queuedWorker);
}
}
if (!domainInfo->ActiveWorkerCount()) {
MOZ_ASSERT(domainInfo->mQueuedWorkers.IsEmpty());
mDomainMap.Remove(domain);
}
}
if (aWorkerPrivate->IsSharedWorker()) {
AssertIsOnMainThread();
nsAutoTArray<nsRefPtr<SharedWorker>, 5> sharedWorkersToNotify;
aWorkerPrivate->GetAllSharedWorkers(sharedWorkersToNotify);
for (uint32_t index = 0; index < sharedWorkersToNotify.Length(); index++) {
MOZ_ASSERT(sharedWorkersToNotify[index]);
sharedWorkersToNotify[index]->NoteDeadWorker(aCx);
}
}
if (parent) {
parent->RemoveChildWorker(aCx, aWorkerPrivate);
}
else if (aWorkerPrivate->IsSharedWorker()) {
mWindowMap.Enumerate(RemoveSharedWorkerFromWindowMap, aWorkerPrivate);
}
else {
// May be null.
nsPIDOMWindow* window = aWorkerPrivate->GetWindow();
nsTArray<WorkerPrivate*>* windowArray;
MOZ_ALWAYS_TRUE(mWindowMap.Get(window, &windowArray));
MOZ_ALWAYS_TRUE(windowArray->RemoveElement(aWorkerPrivate));
if (windowArray->IsEmpty()) {
mWindowMap.Remove(window);
}
}
if (queuedWorker && !ScheduleWorker(aCx, queuedWorker)) {
UnregisterWorker(aCx, queuedWorker);
}
}
bool
RuntimeService::ScheduleWorker(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
if (!aWorkerPrivate->Start()) {
// This is ok, means that we didn't need to make a thread for this worker.
return true;
}
nsRefPtr<WorkerThread> thread;
{
MutexAutoLock lock(mMutex);
if (!mIdleThreadArray.IsEmpty()) {
uint32_t index = mIdleThreadArray.Length() - 1;
mIdleThreadArray[index].mThread.swap(thread);
mIdleThreadArray.RemoveElementAt(index);
}
}
if (!thread) {
thread = WorkerThread::Create();
if (!thread) {
UnregisterWorker(aCx, aWorkerPrivate);
JS_ReportError(aCx, "Could not create new thread!");
return false;
}
}
MOZ_ASSERT(thread->IsAcceptingNonWorkerRunnables());
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!");
}
nsCOMPtr<nsIRunnable> runnable =
new WorkerThreadPrimaryRunnable(aWorkerPrivate, thread, JS_GetParentRuntime(aCx));
if (NS_FAILED(thread->Dispatch(runnable, NS_DISPATCH_NORMAL))) {
UnregisterWorker(aCx, aWorkerPrivate);
JS_ReportError(aCx, "Could not dispatch to thread!");
return false;
}
#ifdef DEBUG
thread->SetAcceptingNonWorkerRunnables(false);
#endif
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::Now() + TimeDuration::FromSeconds(1);
TimeStamp nextExpiration;
nsAutoTArray<nsRefPtr<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;
}
nsRefPtr<WorkerThread>* thread = expiredThreads.AppendElement();
thread->swap(info.mThread);
}
if (!expiredThreads.IsEmpty()) {
runtime->mIdleThreadArray.RemoveElementsAt(0, expiredThreads.Length());
}
}
NS_ASSERTION(nextExpiration.IsNull() || !expiredThreads.IsEmpty(),
"Should have a new time or there should be some threads to shut "
"down");
for (uint32_t index = 0; index < expiredThreads.Length(); index++) {
if (NS_FAILED(expiredThreads[index]->Shutdown())) {
NS_WARNING("Failed to shutdown thread!");
}
}
if (!nextExpiration.IsNull()) {
TimeDuration delta = nextExpiration - TimeStamp::Now();
uint32_t delay(delta > TimeDuration(0) ? delta.ToMilliseconds() : 0);
// Reschedule the timer.
if (NS_FAILED(aTimer->InitWithFuncCallback(ShutdownIdleThreads, nullptr,
delay,
nsITimer::TYPE_ONE_SHOT))) {
NS_ERROR("Can't schedule timer!");
}
}
}
nsresult
RuntimeService::Init()
{
AssertIsOnMainThread();
nsLayoutStatics::AddRef();
// Initialize JSSettings.
if (!sDefaultJSSettings.gcSettings[0].IsSet()) {
sDefaultJSSettings.runtimeOptions = JS::RuntimeOptions();
sDefaultJSSettings.chrome.contextOptions = kRequiredContextOptions;
sDefaultJSSettings.chrome.maxScriptRuntime = -1;
sDefaultJSSettings.chrome.compartmentOptions.setVersion(JSVERSION_LATEST);
sDefaultJSSettings.content.contextOptions = kRequiredContextOptions;
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);
}
// If dump is not controlled by pref, it's set to true.
#ifndef DUMP_CONTROLLED_BY_PREF
sDefaultPreferences[WORKERPREF_DUMP] = true;
#endif
mIdleThreadTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
NS_ENSURE_STATE(mIdleThreadTimer);
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
NS_ENSURE_TRUE(obs, NS_ERROR_FAILURE);
nsresult 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!");
}
NS_ASSERTION(!gRuntimeServiceDuringInit, "This should be null!");
gRuntimeServiceDuringInit = this;
if (NS_FAILED(Preferences::RegisterCallback(
LoadJSGCMemoryOptions,
PREF_JS_OPTIONS_PREFIX PREF_MEM_OPTIONS_PREFIX,
nullptr)) ||
NS_FAILED(Preferences::RegisterCallbackAndCall(
LoadJSGCMemoryOptions,
PREF_WORKERS_OPTIONS_PREFIX PREF_MEM_OPTIONS_PREFIX,
nullptr)) ||
#ifdef JS_GC_ZEAL
NS_FAILED(Preferences::RegisterCallback(
LoadGCZealOptions,
PREF_JS_OPTIONS_PREFIX PREF_GCZEAL,
nullptr)) ||
NS_FAILED(Preferences::RegisterCallbackAndCall(
LoadGCZealOptions,
PREF_WORKERS_OPTIONS_PREFIX PREF_GCZEAL,
nullptr)) ||
#endif
#if DUMP_CONTROLLED_BY_PREF
NS_FAILED(Preferences::RegisterCallbackAndCall(
WorkerPrefChanged,
PREF_DOM_WINDOW_DUMP_ENABLED,
reinterpret_cast<void *>(WORKERPREF_DUMP))) ||
#endif
NS_FAILED(Preferences::RegisterCallback(LoadRuntimeAndContextOptions,
PREF_JS_OPTIONS_PREFIX,
nullptr)) ||
NS_FAILED(Preferences::RegisterCallbackAndCall(
LoadRuntimeAndContextOptions,
PREF_WORKERS_OPTIONS_PREFIX,
nullptr)) ||
NS_FAILED(Preferences::RegisterCallbackAndCall(
JSVersionChanged,
PREF_WORKERS_LATEST_JS_VERSION,
nullptr))) {
NS_WARNING("Failed to register pref callbacks!");
}
NS_ASSERTION(gRuntimeServiceDuringInit == this, "Should be 'this'!");
gRuntimeServiceDuringInit = nullptr;
// 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);
rv = InitOSFileConstants();
if (NS_FAILED(rv)) {
return rv;
}
return NS_OK;
}
void
RuntimeService::Shutdown()
{
AssertIsOnMainThread();
MOZ_ASSERT(!mShuttingDown);
// That's it, no more workers.
mShuttingDown = true;
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
NS_WARN_IF_FALSE(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);
nsAutoTArray<WorkerPrivate*, 100> workers;
mDomainMap.EnumerateRead(AddAllTopLevelWorkersToArray, &workers);
if (!workers.IsEmpty()) {
// Cancel all top-level workers.
{
MutexAutoUnlock unlock(mMutex);
AutoSafeJSContext cx;
JSAutoRequest ar(cx);
for (uint32_t index = 0; index < workers.Length(); index++) {
if (!workers[index]->Kill(cx)) {
NS_WARNING("Failed to cancel worker!");
}
}
}
}
}
}
// 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_WARN_IF_FALSE(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);
nsAutoTArray<WorkerPrivate*, 100> workers;
mDomainMap.EnumerateRead(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()) {
nsAutoTArray<nsRefPtr<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::UnregisterCallback(JSVersionChanged,
PREF_WORKERS_LATEST_JS_VERSION,
nullptr)) ||
NS_FAILED(Preferences::UnregisterCallback(LoadRuntimeAndContextOptions,
PREF_JS_OPTIONS_PREFIX,
nullptr)) ||
NS_FAILED(Preferences::UnregisterCallback(LoadRuntimeAndContextOptions,
PREF_WORKERS_OPTIONS_PREFIX,
nullptr)) ||
#if DUMP_CONTROLLED_BY_PREF
NS_FAILED(Preferences::UnregisterCallback(
WorkerPrefChanged,
PREF_DOM_WINDOW_DUMP_ENABLED,
reinterpret_cast<void *>(WORKERPREF_DUMP))) ||
#endif
#ifdef JS_GC_ZEAL
NS_FAILED(Preferences::UnregisterCallback(
LoadGCZealOptions,
PREF_JS_OPTIONS_PREFIX PREF_GCZEAL,
nullptr)) ||
NS_FAILED(Preferences::UnregisterCallback(
LoadGCZealOptions,
PREF_WORKERS_OPTIONS_PREFIX PREF_GCZEAL,
nullptr)) ||
#endif
NS_FAILED(Preferences::UnregisterCallback(
LoadJSGCMemoryOptions,
PREF_JS_OPTIONS_PREFIX PREF_MEM_OPTIONS_PREFIX,
nullptr)) ||
NS_FAILED(Preferences::UnregisterCallback(
LoadJSGCMemoryOptions,
PREF_WORKERS_OPTIONS_PREFIX PREF_MEM_OPTIONS_PREFIX,
nullptr))) {
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;
}
}
CleanupOSFileConstants();
nsLayoutStatics::Release();
}
// static
PLDHashOperator
RuntimeService::AddAllTopLevelWorkersToArray(const nsACString& aKey,
WorkerDomainInfo* aData,
void* aUserArg)
{
nsTArray<WorkerPrivate*>* array =
static_cast<nsTArray<WorkerPrivate*>*>(aUserArg);
#ifdef DEBUG
for (uint32_t index = 0; index < aData->mActiveWorkers.Length(); index++) {
NS_ASSERTION(!aData->mActiveWorkers[index]->GetParent(),
"Shouldn't have a parent in this list!");
}
#endif
array->AppendElements(aData->mActiveWorkers);
// 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()) {
array->AppendElement(worker);
}
}
return PL_DHASH_NEXT;
}
// static
PLDHashOperator
RuntimeService::RemoveSharedWorkerFromWindowMap(
nsPIDOMWindow* aKey,
nsAutoPtr<nsTArray<WorkerPrivate*> >& aData,
void* aUserArg)
{
AssertIsOnMainThread();
MOZ_ASSERT(aData.get());
MOZ_ASSERT(aUserArg);
auto workerPrivate = static_cast<WorkerPrivate*>(aUserArg);
MOZ_ASSERT(workerPrivate->IsSharedWorker());
if (aData->RemoveElement(workerPrivate)) {
MOZ_ASSERT(!aData->Contains(workerPrivate), "Added worker more than once!");
if (aData->IsEmpty()) {
return PL_DHASH_REMOVE;
}
}
return PL_DHASH_NEXT;
}
// static
PLDHashOperator
RuntimeService::FindSharedWorkerInfo(const nsACString& aKey,
SharedWorkerInfo* aData,
void* aUserArg)
{
auto match = static_cast<MatchSharedWorkerInfo*>(aUserArg);
if (aData->mWorkerPrivate == match->mWorkerPrivate) {
match->mSharedWorkerInfo = aData;
return PL_DHASH_STOP;
}
return PL_DHASH_NEXT;
}
void
RuntimeService::GetWorkersForWindow(nsPIDOMWindow* 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(nsPIDOMWindow* aWindow)
{
AssertIsOnMainThread();
nsAutoTArray<WorkerPrivate*, MAX_WORKERS_PER_DOMAIN> workers;
GetWorkersForWindow(aWindow, workers);
if (!workers.IsEmpty()) {
nsCOMPtr<nsIScriptGlobalObject> sgo = do_QueryInterface(aWindow);
MOZ_ASSERT(sgo);
nsIScriptContext* scx = sgo->GetContext();
AutoPushJSContext cx(scx ?
scx->GetNativeContext() :
nsContentUtils::GetSafeJSContext());
for (uint32_t index = 0; index < workers.Length(); index++) {
WorkerPrivate*& worker = workers[index];
if (worker->IsSharedWorker()) {
worker->CloseSharedWorkersForWindow(aWindow);
} else if (!worker->Cancel(cx)) {
JS_ReportPendingException(cx);
}
}
}
}
void
RuntimeService::SuspendWorkersForWindow(nsPIDOMWindow* aWindow)
{
AssertIsOnMainThread();
MOZ_ASSERT(aWindow);
nsAutoTArray<WorkerPrivate*, MAX_WORKERS_PER_DOMAIN> workers;
GetWorkersForWindow(aWindow, workers);
if (!workers.IsEmpty()) {
nsCOMPtr<nsIScriptGlobalObject> sgo = do_QueryInterface(aWindow);
MOZ_ASSERT(sgo);
nsIScriptContext* scx = sgo->GetContext();
AutoPushJSContext cx(scx ?
scx->GetNativeContext() :
nsContentUtils::GetSafeJSContext());
for (uint32_t index = 0; index < workers.Length(); index++) {
if (!workers[index]->Suspend(cx, aWindow)) {
JS_ReportPendingException(cx);
}
}
}
}
void
RuntimeService::ResumeWorkersForWindow(nsPIDOMWindow* aWindow)
{
AssertIsOnMainThread();
MOZ_ASSERT(aWindow);
nsAutoTArray<WorkerPrivate*, MAX_WORKERS_PER_DOMAIN> workers;
GetWorkersForWindow(aWindow, workers);
if (!workers.IsEmpty()) {
nsCOMPtr<nsIScriptGlobalObject> sgo = do_QueryInterface(aWindow);
MOZ_ASSERT(sgo);
nsIScriptContext* scx = sgo->GetContext();
AutoPushJSContext cx(scx ?
scx->GetNativeContext() :
nsContentUtils::GetSafeJSContext());
for (uint32_t index = 0; index < workers.Length(); index++) {
if (!workers[index]->SynchronizeAndResume(cx, aWindow, scx)) {
JS_ReportPendingException(cx);
}
}
}
}
nsresult
RuntimeService::CreateSharedWorker(const GlobalObject& aGlobal,
const nsAString& aScriptURL,
const nsACString& aName,
SharedWorker** aSharedWorker)
{
AssertIsOnMainThread();
nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aGlobal.GetAsSupports());
MOZ_ASSERT(window);
JSContext* cx = aGlobal.GetContext();
WorkerPrivate::LoadInfo loadInfo;
nsresult rv = WorkerPrivate::GetLoadInfo(cx, window, nullptr, aScriptURL,
false, &loadInfo);
NS_ENSURE_SUCCESS(rv, rv);
MOZ_ASSERT(loadInfo.mResolvedScriptURI);
nsCString scriptSpec;
rv = loadInfo.mResolvedScriptURI->GetSpec(scriptSpec);
NS_ENSURE_SUCCESS(rv, rv);
nsRefPtr<WorkerPrivate> workerPrivate;
{
MutexAutoLock lock(mMutex);
WorkerDomainInfo* domainInfo;
SharedWorkerInfo* sharedWorkerInfo;
nsAutoCString key;
GenerateSharedWorkerKey(scriptSpec, aName, key);
if (mDomainMap.Get(loadInfo.mDomain, &domainInfo) &&
domainInfo->mSharedWorkerInfos.Get(key, &sharedWorkerInfo)) {
workerPrivate = sharedWorkerInfo->mWorkerPrivate;
}
}
bool created = false;
if (!workerPrivate) {
ErrorResult rv;
workerPrivate =
WorkerPrivate::Constructor(aGlobal, aScriptURL, false,
WorkerPrivate::WorkerTypeShared, aName,
&loadInfo, rv);
NS_ENSURE_TRUE(workerPrivate, rv.ErrorCode());
created = true;
}
MOZ_ASSERT(workerPrivate->IsSharedWorker());
nsRefPtr<SharedWorker> sharedWorker =
new SharedWorker(window, workerPrivate);
if (!workerPrivate->RegisterSharedWorker(cx, sharedWorker)) {
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)) {
MatchSharedWorkerInfo match(aWorkerPrivate);
domainInfo->mSharedWorkerInfos.EnumerateRead(FindSharedWorkerInfo,
&match);
if (match.mSharedWorkerInfo) {
nsAutoCString key;
GenerateSharedWorkerKey(match.mSharedWorkerInfo->mScriptSpec,
match.mSharedWorkerInfo->mName, key);
domainInfo->mSharedWorkerInfos.Remove(key);
}
}
}
void
RuntimeService::NoteIdleThread(WorkerThread* aThread)
{
AssertIsOnMainThread();
MOZ_ASSERT(aThread);
#ifdef DEBUG
aThread->SetAcceptingNonWorkerRunnables(true);
#endif
static TimeDuration timeout =
TimeDuration::FromSeconds(IDLE_THREAD_TIMEOUT_SEC);
TimeStamp expirationTime = TimeStamp::Now() + timeout;
bool shutdown;
if (mShuttingDown) {
shutdown = true;
}
else {
MutexAutoLock lock(mMutex);
if (mIdleThreadArray.Length() < MAX_IDLE_THREADS) {
IdleThreadInfo* info = mIdleThreadArray.AppendElement();
info->mThread = aThread;
info->mExpirationTime = expirationTime;
shutdown = false;
}
else {
shutdown = true;
}
}
// Too many idle threads, just shut this one down.
if (shutdown) {
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(aThread->Shutdown()));
return;
}
// Schedule timer.
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mIdleThreadTimer->InitWithFuncCallback(
ShutdownIdleThreads, nullptr,
IDLE_THREAD_TIMEOUT_SEC * 1000,
nsITimer::TYPE_ONE_SHOT)));
}
void
RuntimeService::UpdateAllWorkerRuntimeAndContextOptions()
{
BROADCAST_ALL_WORKERS(UpdateRuntimeAndContextOptions,
sDefaultJSSettings.runtimeOptions,
sDefaultJSSettings.content.contextOptions,
sDefaultJSSettings.chrome.contextOptions);
}
void
RuntimeService::UpdateAllWorkerPreference(WorkerPreference aPref, bool aValue)
{
BROADCAST_ALL_WORKERS(UpdatePreference, aPref, aValue);
}
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);
}
// 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();
return NS_OK;
}
if (!strcmp(aTopic, NS_IOSERVICE_OFFLINE_STATUS_TOPIC)) {
SendOfflineStatusChangeEventToAllWorkers(NS_IsOffline());
return NS_OK;
}
NS_NOTREACHED("Unknown observer topic!");
return NS_OK;
}
/* static */ void
RuntimeService::WorkerPrefChanged(const char* aPrefName, void* aClosure)
{
AssertIsOnMainThread();
uintptr_t tmp = reinterpret_cast<uintptr_t>(aClosure);
MOZ_ASSERT(tmp < WORKERPREF_COUNT);
WorkerPreference key = static_cast<WorkerPreference>(tmp);
#ifdef DUMP_CONTROLLED_BY_PREF
if (key == WORKERPREF_DUMP) {
key = WORKERPREF_DUMP;
sDefaultPreferences[WORKERPREF_DUMP] =
Preferences::GetBool(PREF_DOM_WINDOW_DUMP_ENABLED, false);
}
#endif
// This function should never be registered as a callback for a preference it
// does not handle.
MOZ_ASSERT(key != WORKERPREF_COUNT);
RuntimeService* rts = RuntimeService::GetService();
if (rts) {
rts->UpdateAllWorkerPreference(key, sDefaultPreferences[key]);
}
}
void
RuntimeService::JSVersionChanged(const char* /* aPrefName */, void* /* aClosure */)
{
AssertIsOnMainThread();
bool useLatest = Preferences::GetBool(PREF_WORKERS_LATEST_JS_VERSION, false);
JS::CompartmentOptions& options = sDefaultJSSettings.content.compartmentOptions;
options.setVersion(useLatest ? JSVERSION_LATEST : JSVERSION_DEFAULT);
}
// static
already_AddRefed<RuntimeService::WorkerThread>
RuntimeService::WorkerThread::Create()
{
MOZ_ASSERT(nsThreadManager::get());
nsRefPtr<WorkerThread> thread = new WorkerThread();
if (NS_FAILED(thread->Init())) {
NS_WARNING("Failed to create new thread!");
return nullptr;
}
NS_SetThreadName(thread, "DOM Worker");
return thread.forget();
}
void
RuntimeService::WorkerThread::SetWorker(WorkerPrivate* aWorkerPrivate)
{
MOZ_ASSERT(PR_GetCurrentThread() == mThread);
MOZ_ASSERT_IF(aWorkerPrivate, !mWorkerPrivate);
MOZ_ASSERT_IF(!aWorkerPrivate, mWorkerPrivate);
// No need to lock here because mWorkerPrivate is only modified on mThread.
if (mWorkerPrivate) {
MOZ_ASSERT(mObserver);
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(RemoveObserver(mObserver)));
mObserver = nullptr;
mWorkerPrivate->SetThread(nullptr);
}
mWorkerPrivate = aWorkerPrivate;
if (mWorkerPrivate) {
mWorkerPrivate->SetThread(this);
nsRefPtr<Observer> observer = new Observer(mWorkerPrivate);
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(AddObserver(observer)));
mObserver.swap(observer);
}
}
NS_IMPL_ISUPPORTS_INHERITED0(RuntimeService::WorkerThread, nsThread)
NS_IMETHODIMP
RuntimeService::WorkerThread::Dispatch(nsIRunnable* aRunnable, uint32_t aFlags)
{
// May be called on any thread!
#ifdef DEBUG
if (PR_GetCurrentThread() == mThread) {
MOZ_ASSERT(mWorkerPrivate);
mWorkerPrivate->AssertIsOnWorkerThread();
}
else if (aRunnable && !IsAcceptingNonWorkerRunnables()) {
// Only enforce cancelable runnables after we've started the worker loop.
nsCOMPtr<nsICancelableRunnable> cancelable = do_QueryInterface(aRunnable);
MOZ_ASSERT(cancelable,
"Should have been wrapped by the worker's event target!");
}
#endif
// Workers only support asynchronous dispatch for now.
if (NS_WARN_IF(aFlags != NS_DISPATCH_NORMAL)) {
return NS_ERROR_UNEXPECTED;
}
nsIRunnable* runnableToDispatch;
nsRefPtr<WorkerRunnable> workerRunnable;
if (aRunnable && PR_GetCurrentThread() == mThread) {
// No need to lock here because mWorkerPrivate is only modified on mThread.
workerRunnable = mWorkerPrivate->MaybeWrapAsWorkerRunnable(aRunnable);
runnableToDispatch = workerRunnable;
}
else {
runnableToDispatch = aRunnable;
}
nsresult rv = nsThread::Dispatch(runnableToDispatch, NS_DISPATCH_NORMAL);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
NS_IMPL_ISUPPORTS(RuntimeService::WorkerThread::Observer, nsIThreadObserver)
NS_IMETHODIMP
RuntimeService::WorkerThread::Observer::OnDispatchedEvent(
nsIThreadInternal* /*aThread */)
{
MOZ_ASSUME_UNREACHABLE("This should never be called!");
}
NS_IMETHODIMP
RuntimeService::WorkerThread::Observer::OnProcessNextEvent(
nsIThreadInternal* /* aThread */,
bool aMayWait,
uint32_t aRecursionDepth)
{
mWorkerPrivate->AssertIsOnWorkerThread();
MOZ_ASSERT(!aMayWait);
mWorkerPrivate->OnProcessNextEvent(aRecursionDepth);
return NS_OK;
}
NS_IMETHODIMP
RuntimeService::WorkerThread::Observer::AfterProcessNextEvent(
nsIThreadInternal* /* aThread */,
uint32_t aRecursionDepth,
bool /* aEventWasProcessed */)
{
mWorkerPrivate->AssertIsOnWorkerThread();
mWorkerPrivate->AfterProcessNextEvent(aRecursionDepth);
return NS_OK;
}
NS_IMPL_ISUPPORTS_INHERITED0(LogViolationDetailsRunnable, nsRunnable)
NS_IMETHODIMP
LogViolationDetailsRunnable::Run()
{
AssertIsOnMainThread();
nsIContentSecurityPolicy* csp = mWorkerPrivate->GetCSP();
if (csp) {
NS_NAMED_LITERAL_STRING(scriptSample,
"Call to eval() or related function blocked by CSP.");
if (mWorkerPrivate->GetReportCSPViolations()) {
csp->LogViolationDetails(nsIContentSecurityPolicy::VIOLATION_TYPE_EVAL,
mFileName, scriptSample, mLineNum,
EmptyString(), EmptyString());
}
}
nsRefPtr<MainThreadStopSyncLoopRunnable> response =
new MainThreadStopSyncLoopRunnable(mWorkerPrivate, mSyncLoopTarget.forget(),
true);
MOZ_ALWAYS_TRUE(response->Dispatch(nullptr));
return NS_OK;
}
NS_IMPL_ISUPPORTS_INHERITED0(WorkerThreadPrimaryRunnable, nsRunnable)
NS_IMETHODIMP
WorkerThreadPrimaryRunnable::Run()
{
#ifdef MOZ_NUWA_PROCESS
if (IsNuwaProcess()) {
NS_ASSERTION(NuwaMarkCurrentThread != nullptr,
"NuwaMarkCurrentThread is undefined!");
NuwaMarkCurrentThread(nullptr, nullptr);
NuwaFreezeCurrentThread();
}
#endif
char stackBaseGuess;
nsAutoCString threadName;
threadName.AssignLiteral("WebWorker '");
threadName.Append(NS_LossyConvertUTF16toASCII(mWorkerPrivate->ScriptURL()));
threadName.Append('\'');
profiler_register_thread(threadName.get(), &stackBaseGuess);
mThread->SetWorker(mWorkerPrivate);
mWorkerPrivate->AssertIsOnWorkerThread();
{
nsCycleCollector_startup();
WorkerJSRuntime runtime(mParentRuntime, mWorkerPrivate);
JSRuntime* rt = runtime.Runtime();
JSContext* cx = CreateJSContextForWorker(mWorkerPrivate, rt);
if (!cx) {
// XXX need to fire an error at parent.
NS_ERROR("Failed to create runtime and context!");
return NS_ERROR_FAILURE;
}
{
#ifdef MOZ_ENABLE_PROFILER_SPS
PseudoStack* stack = mozilla_get_pseudo_stack();
if (stack) {
stack->sampleRuntime(rt);
}
#endif
{
JSAutoRequest ar(cx);
mWorkerPrivate->DoRunLoop(cx);
JS_ReportPendingException(cx);
}
#ifdef MOZ_ENABLE_PROFILER_SPS
if (stack) {
stack->sampleRuntime(nullptr);
}
#endif
}
// Destroy the main context. This will unroot the main worker global and
// GC. This is not the last JSContext (WorkerJSRuntime maintains an
// internal JSContext).
JS_DestroyContext(cx);
// Now WorkerJSRuntime goes out of scope and its destructor will shut
// down the cycle collector and destroy the final JSContext. This
// breaks any remaining cycles and collects the C++ and JS objects
// participating.
}
mThread->SetWorker(nullptr);
mWorkerPrivate->ScheduleDeletion(WorkerPrivate::WorkerRan);
// It is no longer safe to touch mWorkerPrivate.
mWorkerPrivate = nullptr;
// Now recycle this thread.
nsCOMPtr<nsIThread> mainThread = do_GetMainThread();
MOZ_ASSERT(mainThread);
nsRefPtr<FinishedRunnable> finishedRunnable =
new FinishedRunnable(mThread.forget());
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(mainThread->Dispatch(finishedRunnable,
NS_DISPATCH_NORMAL)));
profiler_unregister_thread();
return NS_OK;
}
NS_IMPL_ISUPPORTS_INHERITED0(WorkerThreadPrimaryRunnable::FinishedRunnable,
nsRunnable)
NS_IMETHODIMP
WorkerThreadPrimaryRunnable::FinishedRunnable::Run()
{
AssertIsOnMainThread();
nsRefPtr<RuntimeService::WorkerThread> thread;
mThread.swap(thread);
RuntimeService* rts = RuntimeService::GetService();
if (rts) {
rts->NoteIdleThread(thread);
}
else if (thread->ShutdownRequired()) {
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(thread->Shutdown()));
}
return NS_OK;
}
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