C++ (Cpp) HeapRootVisitor::visitor示例

示例#1

文件： WeakBlock.cpp 项目： Comcast/WebKitForWayland

void WeakBlock::visit(HeapRootVisitor& heapRootVisitor)
{
    // If a block is completely empty, a visit won't have any effect.
    if (isEmpty())
        return;

    // If this WeakBlock doesn't belong to a MarkedBlock, we won't even be here.
    ASSERT(m_markedBlock);

    // We only visit after marking.
    ASSERT(m_markedBlock->isMarkedOrRetired());

    SlotVisitor& visitor = heapRootVisitor.visitor();

    for (size_t i = 0; i < weakImplCount(); ++i) {
        WeakImpl* weakImpl = &weakImpls()[i];
        if (weakImpl->state() != WeakImpl::Live)
            continue;

        WeakHandleOwner* weakHandleOwner = weakImpl->weakHandleOwner();
        if (!weakHandleOwner)
            continue;

        const JSValue& jsValue = weakImpl->jsValue();
        if (m_markedBlock->isMarkedOrNewlyAllocated(jsValue.asCell()))
            continue;

        if (!weakHandleOwner->isReachableFromOpaqueRoots(Handle<Unknown>::wrapSlot(&const_cast<JSValue&>(jsValue)), weakImpl->context(), visitor))
            continue;

        heapRootVisitor.visit(&const_cast<JSValue&>(jsValue));
    }
}

示例#2

文件： WeakBlock.cpp 项目： eocanha/webkit

void WeakBlock::specializedVisit(ContainerType& container, HeapRootVisitor& heapRootVisitor)
{
    SlotVisitor& visitor = heapRootVisitor.visitor();
    
    HeapVersion markingVersion = visitor.markingVersion();

    for (size_t i = 0; i < weakImplCount(); ++i) {
        WeakImpl* weakImpl = &weakImpls()[i];
        if (weakImpl->state() != WeakImpl::Live)
            continue;

        WeakHandleOwner* weakHandleOwner = weakImpl->weakHandleOwner();
        if (!weakHandleOwner)
            continue;

        const JSValue& jsValue = weakImpl->jsValue();
        if (container.isMarkedConcurrently(markingVersion, jsValue.asCell()))
            continue;
        
        if (!weakHandleOwner->isReachableFromOpaqueRoots(Handle<Unknown>::wrapSlot(&const_cast<JSValue&>(jsValue)), weakImpl->context(), visitor))
            continue;

        heapRootVisitor.visit(&const_cast<JSValue&>(jsValue));
    }
}

示例#3

文件： WeakBlock.cpp 项目： Moondee/Artemis

void WeakBlock::visitLiveWeakImpls(HeapRootVisitor& heapRootVisitor)
{
    // If a block is completely empty, a visit won't have any effect.
    if (!m_sweepResult.isNull() && m_sweepResult.blockIsFree)
        return;

    SlotVisitor& visitor = heapRootVisitor.visitor();

    for (size_t i = 0; i < weakImplCount(); ++i) {
        WeakImpl* weakImpl = &weakImpls()[i];
        if (weakImpl->state() != WeakImpl::Live)
            continue;

        const JSValue& jsValue = weakImpl->jsValue();
        if (Heap::isMarked(jsValue.asCell()))
            continue;

        WeakHandleOwner* weakHandleOwner = weakImpl->weakHandleOwner();
        if (!weakHandleOwner)
            continue;

        if (!weakHandleOwner->isReachableFromOpaqueRoots(Handle<Unknown>::wrapSlot(&const_cast<JSValue&>(jsValue)), weakImpl->context(), visitor))
            continue;

        heapRootVisitor.visit(&const_cast<JSValue&>(jsValue));
    }
}

示例#4

文件： HandleHeap.cpp 项目： 13W/phantomjs

void HandleHeap::markWeakHandles(HeapRootVisitor& heapRootVisitor)
{
    SlotVisitor& visitor = heapRootVisitor.visitor();

    Node* end = m_weakList.end();
    for (Node* node = m_weakList.begin(); node != end; node = node->next()) {
        ASSERT(isValidWeakNode(node));
        JSCell* cell = node->slot()->asCell();
        if (Heap::isMarked(cell))
            continue;

        WeakHandleOwner* weakOwner = node->weakOwner();
        if (!weakOwner)
            continue;

        if (!weakOwner->isReachableFromOpaqueRoots(Handle<Unknown>::wrapSlot(node->slot()), node->weakOwnerContext(), visitor))
            continue;

        heapRootVisitor.mark(node->slot());
    }
}

示例#5

文件： HandleHeap.cpp 项目： 1833183060/wke

void HandleHeap::visitWeakHandles(HeapRootVisitor& heapRootVisitor)
{
    SlotVisitor& visitor = heapRootVisitor.visitor();

    Node* end = m_weakList.end();
    for (Node* node = m_weakList.begin(); node != end; node = node->next()) {
#if ENABLE(GC_VALIDATION)
        if (!isValidWeakNode(node))
            CRASH();
#endif
        JSCell* cell = node->slot()->asCell();
        if (Heap::isMarked(cell))
            continue;

        WeakHandleOwner* weakOwner = node->weakOwner();
        if (!weakOwner)
            continue;

        if (!weakOwner->isReachableFromOpaqueRoots(Handle<Unknown>::wrapSlot(node->slot()), node->weakOwnerContext(), visitor))
            continue;

        heapRootVisitor.visit(node->slot());
    }
}