void ThreadGlobalData::setWebCoreThreadData()
{
ASSERT(isWebThread());
ASSERT(&threadGlobalData() != ThreadGlobalData::sharedMainThreadStaticData);
// Set WebThread's ThreadGlobalData object to be the same as the main UI thread.
ThreadGlobalData::staticData->replace(ThreadGlobalData::sharedMainThreadStaticData);
ASSERT(&threadGlobalData() == ThreadGlobalData::sharedMainThreadStaticData);
}
RunLoopSetup(WorkerRunLoop& runLoop)
: m_runLoop(runLoop)
{
if (!m_runLoop.m_nestedCount)
threadGlobalData().threadTimers().setSharedTimer(m_runLoop.m_sharedTimer.get());
m_runLoop.m_nestedCount++;
}
~RunLoopSetup()
{
m_runLoop.m_nestedCount--;
if (!m_runLoop.m_nestedCount)
threadGlobalData().threadTimers().setSharedTimer(0);
InspectorInstrumentation::didLeaveNestedRunLoop(m_context);
}
void TimerBase::setNextFireTime(double newTime)
{
ASSERT(m_thread == currentThread());
// Keep heap valid while changing the next-fire time.
double oldTime = m_nextFireTime;
if (oldTime != newTime) {
m_nextFireTime = newTime;
static unsigned currentHeapInsertionOrder;
m_heapInsertionOrder = currentHeapInsertionOrder++;
bool wasFirstTimerInHeap = m_heapIndex == 0;
if (oldTime == 0)
heapInsert();
else if (newTime == 0)
heapDelete();
else if (newTime < oldTime)
heapDecreaseKey();
else
heapIncreaseKey();
bool isFirstTimerInHeap = m_heapIndex == 0;
if (wasFirstTimerInHeap || isFirstTimerInHeap)
threadGlobalData().threadTimers().updateSharedTimer();
}
checkConsistency();
}
RunLoopSetup(WorkerRunLoop& runLoop, WorkerGlobalScope* context)
: m_runLoop(runLoop)
, m_context(context)
{
if (!m_runLoop.m_nestedCount)
threadGlobalData().threadTimers().setSharedTimer(m_runLoop.m_sharedTimer.get());
m_runLoop.m_nestedCount++;
InspectorInstrumentation::willEnterNestedRunLoop(m_context);
}
void ThreadTimers::sharedTimerFired()
{
TRACE_EVENT_SAMPLING_STATE0("WebKit\0WebKitInternal");
// Redirect to non-static method.
threadGlobalData().threadTimers().sharedTimerFiredInternal();
TRACE_EVENT_SAMPLING_STATE0("WebKit\0WebKitSleeping");
}
void WorkerThread::workerThread()
{
// Propagate the mainThread's fenv to workers.
#if PLATFORM(IOS)
FloatingPointEnvironment::singleton().propagateMainThreadEnvironment();
#endif
#if PLATFORM(GTK)
GRefPtr<GMainContext> mainContext = adoptGRef(g_main_context_new());
g_main_context_push_thread_default(mainContext.get());
#endif
{
LockHolder lock(m_threadCreationMutex);
m_workerGlobalScope = createWorkerGlobalScope(m_startupData->m_scriptURL, m_startupData->m_userAgent, m_startupData->m_contentSecurityPolicyResponseHeaders, m_startupData->m_shouldBypassMainWorldContentSecurityPolicy, WTFMove(m_startupData->m_topOrigin));
if (m_runLoop.terminated()) {
// The worker was terminated before the thread had a chance to run. Since the context didn't exist yet,
// forbidExecution() couldn't be called from stop().
m_workerGlobalScope->script()->forbidExecution();
}
}
WorkerScriptController* script = m_workerGlobalScope->script();
script->evaluate(ScriptSourceCode(m_startupData->m_sourceCode, m_startupData->m_scriptURL));
// Free the startup data to cause its member variable deref's happen on the worker's thread (since
// all ref/derefs of these objects are happening on the thread at this point). Note that
// WorkerThread::~WorkerThread happens on a different thread where it was created.
m_startupData = nullptr;
runEventLoop();
#if PLATFORM(GTK)
g_main_context_pop_thread_default(mainContext.get());
#endif
ThreadIdentifier threadID = m_threadID;
ASSERT(m_workerGlobalScope->hasOneRef());
// The below assignment will destroy the context, which will in turn notify messaging proxy.
// We cannot let any objects survive past thread exit, because no other thread will run GC or otherwise destroy them.
m_workerGlobalScope = nullptr;
// Clean up WebCore::ThreadGlobalData before WTF::WTFThreadData goes away!
threadGlobalData().destroy();
// The thread object may be already destroyed from notification now, don't try to access "this".
detachThread(threadID);
}
// A worker thread may initialize SharedTimer after some timers are created.
// Also, SharedTimer can be replaced with nullptr before all timers are destroyed.
void ThreadTimers::setSharedTimer(SharedTimer* sharedTimer)
{
if (m_sharedTimer) {
m_sharedTimer->setFiredFunction(nullptr);
m_sharedTimer->stop();
m_pendingSharedTimerFireTime = 0;
}
m_sharedTimer = sharedTimer;
if (sharedTimer) {
m_sharedTimer->setFiredFunction([] { threadGlobalData().threadTimers().sharedTimerFiredInternal(); });
updateSharedTimer();
}
}
void WorkerThread::workerThread()
{
// Propagate the mainThread's fenv to workers.
#if PLATFORM(IOS)
fesetenv(&mainThreadFEnv);
#endif
{
MutexLocker lock(m_threadCreationMutex);
m_workerGlobalScope = createWorkerGlobalScope(m_startupData->m_scriptURL, m_startupData->m_userAgent, std::move(m_startupData->m_groupSettings), m_startupData->m_contentSecurityPolicy, m_startupData->m_contentSecurityPolicyType, m_startupData->m_topOrigin.release());
if (m_runLoop.terminated()) {
// The worker was terminated before the thread had a chance to run. Since the context didn't exist yet,
// forbidExecution() couldn't be called from stop().
m_workerGlobalScope->script()->forbidExecution();
}
}
WorkerScriptController* script = m_workerGlobalScope->script();
#if ENABLE(INSPECTOR)
InspectorInstrumentation::willEvaluateWorkerScript(workerGlobalScope(), m_startupData->m_startMode);
#endif
script->evaluate(ScriptSourceCode(m_startupData->m_sourceCode, m_startupData->m_scriptURL));
// Free the startup data to cause its member variable deref's happen on the worker's thread (since
// all ref/derefs of these objects are happening on the thread at this point). Note that
// WorkerThread::~WorkerThread happens on a different thread where it was created.
m_startupData.clear();
runEventLoop();
ThreadIdentifier threadID = m_threadID;
ASSERT(m_workerGlobalScope->hasOneRef());
// The below assignment will destroy the context, which will in turn notify messaging proxy.
// We cannot let any objects survive past thread exit, because no other thread will run GC or otherwise destroy them.
m_workerGlobalScope = 0;
// Clean up WebCore::ThreadGlobalData before WTF::WTFThreadData goes away!
threadGlobalData().destroy();
// The thread object may be already destroyed from notification now, don't try to access "this".
detachThread(threadID);
}
void* WorkerThread::workerThread()
{
{
MutexLocker lock(m_threadCreationMutex);
#if OS(OLYMPIA)
m_workerContext = createWorkerContext(m_startupData->m_scriptURL, m_startupData->m_groupName, m_startupData->m_userAgent);
Olympia::Platform::didStartWorker();
#else
m_workerContext = createWorkerContext(m_startupData->m_scriptURL, m_startupData->m_userAgent);
#endif
if (m_runLoop.terminated()) {
// The worker was terminated before the thread had a chance to run. Since the context didn't exist yet,
// forbidExecution() couldn't be called from stop().
m_workerContext->script()->forbidExecution(WorkerScriptController::TerminateRunningScript);
}
}
WorkerScriptController* script = m_workerContext->script();
script->evaluate(ScriptSourceCode(m_startupData->m_sourceCode, m_startupData->m_scriptURL));
// Free the startup data to cause its member variable deref's happen on the worker's thread (since
// all ref/derefs of these objects are happening on the thread at this point). Note that
// WorkerThread::~WorkerThread happens on a different thread where it was created.
m_startupData.clear();
runEventLoop();
ThreadIdentifier threadID = m_threadID;
ASSERT(m_workerContext->hasOneRef());
// The below assignment will destroy the context, which will in turn notify messaging proxy.
// We cannot let any objects survive past thread exit, because no other thread will run GC or otherwise destroy them.
m_workerContext = 0;
// Clean up WebCore::ThreadGlobalData before WTF::WTFThreadData goes away!
threadGlobalData().destroy();
// The thread object may be already destroyed from notification now, don't try to access "this".
detachThread(threadID);
return 0;
}
void TimerBase::setNextFireTime(double newTime)
{
ASSERT(canAccessThreadLocalDataForThread(m_thread));
ASSERT(!m_wasDeleted);
if (m_unalignedNextFireTime != newTime)
m_unalignedNextFireTime = newTime;
// Accessing thread global data is slow. Cache the heap pointer.
if (!m_cachedThreadGlobalTimerHeap)
m_cachedThreadGlobalTimerHeap = &threadGlobalTimerHeap();
// Keep heap valid while changing the next-fire time.
double oldTime = m_nextFireTime;
// Don't realign zero-delay timers.
if (newTime) {
if (auto newAlignedTime = alignedFireTime(secondsToMS(newTime)))
newTime = msToSeconds(newAlignedTime.value());
}
if (oldTime != newTime) {
m_nextFireTime = newTime;
// FIXME: This should be part of ThreadTimers, or another per-thread structure.
static std::atomic<unsigned> currentHeapInsertionOrder;
m_heapInsertionOrder = currentHeapInsertionOrder++;
bool wasFirstTimerInHeap = m_heapIndex == 0;
updateHeapIfNeeded(oldTime);
bool isFirstTimerInHeap = m_heapIndex == 0;
if (wasFirstTimerInHeap || isFirstTimerInHeap)
threadGlobalData().threadTimers().updateSharedTimer();
}
checkConsistency();
}
static TECConverterWrapper& cachedConverterTEC()
{
return threadGlobalData().cachedConverterTEC();
}
void ThreadTimers::sharedTimerFired()
{
// Redirect to non-static method.
threadGlobalData().threadTimers().sharedTimerFiredInternal();
}
~RunLoopSetup()
{
m_runLoop.m_nestedCount--;
if (!m_runLoop.m_nestedCount)
threadGlobalData().threadTimers().setSharedTimer(0);
}
bool DOMImplementation::isXMLMIMEType(const String& mimeType)
{
if (mimeType == "text/xml" || mimeType == "application/xml" || mimeType == "text/xsl")
return true;
return threadGlobalData().xmlTypeRegExp().isXMLMIMEType(mimeType);
}
StringImpl* StringImpl::empty()
{
return threadGlobalData().emptyString();
}
ThreadLocalInspectorCounters& ThreadLocalInspectorCounters::current()
{
return threadGlobalData().inspectorCounters();
}
void TimerBase::fireTimersInNestedEventLoop()
{
// Redirect to ThreadTimers.
threadGlobalData().threadTimers().fireTimersInNestedEventLoop();
}
// Simple accessors to thread-specific data.
static Vector<TimerBase*>& timerHeap()
{
return threadGlobalData().threadTimers().timerHeap();
}