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Old space cannot be assumed to be iterable between GCs, even if swept precisely.

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This is because allocation folding can cause uninitialized and hence uniterable fragments. Trying to inspect them causes SizeFromMap() crashes.

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/467693002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23084 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
jkummerow@chromium.org 2014-08-12 15:29:03 +00:00
parent d2fe3e68ea
commit 2c6d5cfb27
1 changed files with 5 additions and 10 deletions
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5
src/heap/mark-compact.cc
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@ -2009,17 +2009,12 @@ int MarkCompactCollector::DiscoverAndEvacuateBlackObjectsOnPage(
static void DiscoverGreyObjectsInSpace(Heap* heap, MarkingDeque* marking_deque,
PagedSpace* space) {
if (space->swept_precisely()) {
HeapObjectIterator it(space);
DiscoverGreyObjectsWithIterator(heap, marking_deque, &it);
} else {
PageIterator it(space);
while (it.has_next()) {
Page* p = it.next();
DiscoverGreyObjectsOnPage(marking_deque, p);
if (marking_deque->IsFull()) return;
}
}
}