void MachineThreads::gatherConservativeRoots(ConservativeRoots& conservativeRoots, void* stackCurrent)
{
gatherFromCurrentThread(conservativeRoots, stackCurrent);
#if ENABLE(JSC_MULTIPLE_THREADS)
if (m_threadSpecific) {
MutexLocker lock(m_registeredThreadsMutex);
#ifndef NDEBUG
// Forbid malloc during the gather phase. The gather phase suspends
// threads, so a malloc during gather would risk a deadlock with a
// thread that had been suspended while holding the malloc lock.
fastMallocForbid();
#endif
// It is safe to access the registeredThreads list, because we earlier asserted that locks are being held,
// and since this is a shared heap, they are real locks.
for (Thread* thread = m_registeredThreads; thread; thread = thread->next) {
if (!pthread_equal(thread->posixThread, pthread_self()))
gatherFromOtherThread(conservativeRoots, thread);
}
#ifndef NDEBUG
fastMallocAllow();
#endif
}
#endif
}
void MachineThreads::gatherConservativeRoots(ConservativeRoots& conservativeRoots, void* stackCurrent)
{
gatherFromCurrentThread(conservativeRoots, stackCurrent);
if (m_threadSpecific) {
PlatformThread currentPlatformThread = getCurrentPlatformThread();
MutexLocker lock(m_registeredThreadsMutex);
#ifndef NDEBUG
// Forbid malloc during the gather phase. The gather phase suspends
// threads, so a malloc during gather would risk a deadlock with a
// thread that had been suspended while holding the malloc lock.
fastMallocForbid();
#endif
for (Thread* thread = m_registeredThreads; thread; thread = thread->next) {
if (!equalThread(thread->platformThread, currentPlatformThread))
suspendThread(thread->platformThread);
}
// It is safe to access the registeredThreads list, because we earlier asserted that locks are being held,
// and since this is a shared heap, they are real locks.
for (Thread* thread = m_registeredThreads; thread; thread = thread->next) {
if (!equalThread(thread->platformThread, currentPlatformThread))
gatherFromOtherThread(conservativeRoots, thread);
}
for (Thread* thread = m_registeredThreads; thread; thread = thread->next) {
if (!equalThread(thread->platformThread, currentPlatformThread))
resumeThread(thread->platformThread);
}
#ifndef NDEBUG
fastMallocAllow();
#endif
}
}
