void LargeAllocation::lastChanceToFinalize()
{
m_weakSet.lastChanceToFinalize();
clearMarked();
clearNewlyAllocated();
sweep();
}
void MarkedBlock::lastChanceToFinalize()
{
m_weakSet.lastChanceToFinalize();
clearNewlyAllocated();
clearMarksWithCollectionType<FullCollection>();
sweep();
}
void MarkedBlock::canonicalizeCellLivenessData(const FreeList& freeList)
{
HEAP_LOG_BLOCK_STATE_TRANSITION(this);
FreeCell* head = freeList.head;
if (m_state == Marked) {
// If the block is in the Marked state then we know that:
// 1) It was not used for allocation during the previous allocation cycle.
// 2) It may have dead objects, and we only know them to be dead by the
// fact that their mark bits are unset.
// Hence if the block is Marked we need to leave it Marked.
ASSERT(!head);
return;
}
ASSERT(m_state == FreeListed);
// Roll back to a coherent state for Heap introspection. Cells newly
// allocated from our free list are not currently marked, so we need another
// way to tell what's live vs dead.
ASSERT(!m_newlyAllocated);
m_newlyAllocated = adoptPtr(new WTF::Bitmap<atomsPerBlock>());
SetNewlyAllocatedFunctor functor(this);
forEachCell(functor);
FreeCell* next;
for (FreeCell* current = head; current; current = next) {
next = current->next;
reinterpret_cast<JSCell*>(current)->zap();
clearNewlyAllocated(current);
}
m_state = Marked;
}