GCThreadSharedData::GCThreadSharedData(VM* vm)
: m_vm(vm)
, m_copiedSpace(&vm->heap.m_storageSpace)
, m_shouldHashCons(false)
, m_sharedMarkStack()
, m_numberOfActiveParallelMarkers(0)
, m_parallelMarkersShouldExit(false)
, m_copyIndex(0)
, m_numberOfActiveGCThreads(0)
, m_gcThreadsShouldWait(false)
, m_currentPhase(NoPhase)
{
#if ENABLE(PARALLEL_GC)
// Grab the lock so the new GC threads can be properly initialized before they start running.
std::unique_lock<std::mutex> lock(m_phaseMutex);
for (unsigned i = 1; i < Options::numberOfGCMarkers(); ++i) {
m_numberOfActiveGCThreads++;
SlotVisitor* slotVisitor = new SlotVisitor(*this);
CopyVisitor* copyVisitor = new CopyVisitor(*this);
GCThread* newThread = new GCThread(*this, slotVisitor, copyVisitor);
ThreadIdentifier threadID = createThread(GCThread::gcThreadStartFunc, newThread, "JavaScriptCore::Marking");
newThread->initializeThreadID(threadID);
m_gcThreads.append(newThread);
}
// Wait for all the GCThreads to get to the right place.
m_activityConditionVariable.wait(lock, [this] { return !m_numberOfActiveGCThreads; });
#endif
}
GCThreadSharedData::GCThreadSharedData(JSGlobalData* globalData)
: m_globalData(globalData)
, m_copiedSpace(&globalData->heap.m_storageSpace)
, m_shouldHashConst(false)
, m_sharedMarkStack(m_segmentAllocator)
, m_numberOfActiveParallelMarkers(0)
, m_parallelMarkersShouldExit(false)
, m_blocksToCopy(globalData->heap.m_blockSnapshot)
, m_copyIndex(0)
, m_numberOfActiveGCThreads(0)
, m_gcThreadsShouldWait(false)
, m_currentPhase(NoPhase)
{
m_copyLock.Init();
#if ENABLE(PARALLEL_GC)
// Grab the lock so the new GC threads can be properly initialized before they start running.
MutexLocker locker(m_phaseLock);
for (unsigned i = 1; i < Options::numberOfGCMarkers(); ++i) {
m_numberOfActiveGCThreads++;
SlotVisitor* slotVisitor = new SlotVisitor(*this);
CopyVisitor* copyVisitor = new CopyVisitor(*this);
GCThread* newThread = new GCThread(*this, slotVisitor, copyVisitor);
ThreadIdentifier threadID = createThread(GCThread::gcThreadStartFunc, newThread, "JavaScriptCore::Marking");
newThread->initializeThreadID(threadID);
m_gcThreads.append(newThread);
}
// Wait for all the GCThreads to get to the right place.
while (m_numberOfActiveGCThreads)
m_activityCondition.wait(m_phaseLock);
#endif
}
void GCThread::gcThreadStartFunc(void* data)
{
GCThread* thread = static_cast<GCThread*>(data);
thread->gcThreadMain();
}