void SlotVisitor::appendToMarkStack(JSCell* cell)
{
if (cell->isLargeAllocation())
appendToMarkStack(cell->largeAllocation(), cell);
else
appendToMarkStack(cell->markedBlock(), cell);
}
void SlotVisitor::appendJSCellOrAuxiliary(HeapCell* heapCell)
{
if (!heapCell)
return;
ASSERT(!m_isCheckingForDefaultMarkViolation);
if (Heap::testAndSetMarked(m_markingVersion, heapCell))
return;
switch (heapCell->cellKind()) {
case HeapCell::JSCell: {
JSCell* jsCell = static_cast<JSCell*>(heapCell);
if (!jsCell->structure()) {
ASSERT_NOT_REACHED();
return;
}
jsCell->setCellState(CellState::Grey);
appendToMarkStack(jsCell);
return;
}
case HeapCell::Auxiliary: {
noteLiveAuxiliaryCell(heapCell);
return;
} }
}
ALWAYS_INLINE void SlotVisitor::setMarkedAndAppendToMarkStack(ContainerType& container, JSCell* cell)
{
container.aboutToMark(m_markingVersion);
if (container.testAndSetMarked(cell))
return;
ASSERT(cell->structure());
// Indicate that the object is grey and that:
// In case of concurrent GC: it's the first time it is grey in this GC cycle.
// In case of eden collection: it's a new object that became grey rather than an old remembered object.
cell->setCellState(CellState::Grey);
appendToMarkStack(container, cell);
}
void SlotVisitor::setMarkedAndAppendToMarkStack(JSCell* cell)
{
ASSERT(!m_isCheckingForDefaultMarkViolation);
if (!cell)
return;
#if ENABLE(GC_VALIDATION)
validate(cell);
#endif
if (Heap::testAndSetMarked(cell) || !cell->structure()) {
ASSERT(cell->structure());
return;
}
// Indicate that the object is grey and that:
// In case of concurrent GC: it's the first time it is grey in this GC cycle.
// In case of eden collection: it's a new object that became grey rather than an old remembered object.
cell->setCellState(CellState::NewGrey);
appendToMarkStack(cell);
}