예제 #1
0
void Worklist::removeDeadPlans(VM& vm)
{
    {
        LockHolder locker(m_lock);
        HashSet<CompilationKey> deadPlanKeys;
        for (PlanMap::iterator iter = m_plans.begin(); iter != m_plans.end(); ++iter) {
            Plan* plan = iter->value.get();
            if (&plan->vm != &vm)
                continue;
            if (plan->isKnownToBeLiveDuringGC())
                continue;
            RELEASE_ASSERT(plan->stage != Plan::Cancelled); // Should not be cancelled, yet.
            ASSERT(!deadPlanKeys.contains(plan->key()));
            deadPlanKeys.add(plan->key());
        }
        if (!deadPlanKeys.isEmpty()) {
            for (HashSet<CompilationKey>::iterator iter = deadPlanKeys.begin(); iter != deadPlanKeys.end(); ++iter)
                m_plans.take(*iter)->cancel();
            Deque<RefPtr<Plan>> newQueue;
            while (!m_queue.isEmpty()) {
                RefPtr<Plan> plan = m_queue.takeFirst();
                if (plan->stage != Plan::Cancelled)
                    newQueue.append(plan);
            }
            m_queue.swap(newQueue);
            for (unsigned i = 0; i < m_readyPlans.size(); ++i) {
                if (m_readyPlans[i]->stage != Plan::Cancelled)
                    continue;
                m_readyPlans[i] = m_readyPlans.last();
                m_readyPlans.removeLast();
            }
        }
    }
    
    // No locking needed for this part, see comment in visitWeakReferences().
    for (unsigned i = m_threads.size(); i--;) {
        ThreadData* data = m_threads[i].get();
        Safepoint* safepoint = data->m_safepoint;
        if (!safepoint)
            continue;
        if (&safepoint->vm() != &vm)
            continue;
        if (safepoint->isKnownToBeLiveDuringGC())
            continue;
        safepoint->cancel();
    }
}
예제 #2
0
void Worklist::visitChildren(SlotVisitor& visitor, CodeBlockSet& codeBlocks)
{
    VM* vm = visitor.heap()->vm();
    for (PlanMap::iterator iter = m_plans.begin(); iter != m_plans.end(); ++iter) {
        Plan* plan = iter->value.get();
        if (&plan->vm != vm)
            continue;
        iter->key.visitChildren(codeBlocks);
        iter->value->visitChildren(visitor, codeBlocks);
    }

    for (unsigned i = m_threads.size(); i--;) {
        ThreadData* data = m_threads[i].get();
        Safepoint* safepoint = data->m_safepoint;
        if (safepoint && &safepoint->vm() == vm)
            safepoint->visitChildren(visitor);
    }
}
예제 #3
0
void Worklist::visitWeakReferences(SlotVisitor& visitor)
{
    VM* vm = visitor.heap()->vm();
    {
        LockHolder locker(m_lock);
        for (PlanMap::iterator iter = m_plans.begin(); iter != m_plans.end(); ++iter) {
            Plan* plan = iter->value.get();
            if (&plan->vm != vm)
                continue;
            plan->checkLivenessAndVisitChildren(visitor);
        }
    }
    // This loop doesn't need locking because:
    // (1) no new threads can be added to m_threads. Hence, it is immutable and needs no locks.
    // (2) ThreadData::m_safepoint is protected by that thread's m_rightToRun which we must be
    //     holding here because of a prior call to suspendAllThreads().
    for (unsigned i = m_threads.size(); i--;) {
        ThreadData* data = m_threads[i].get();
        Safepoint* safepoint = data->m_safepoint;
        if (safepoint && &safepoint->vm() == vm)
            safepoint->checkLivenessAndVisitChildren(visitor);
    }
}