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[heap] Bailout in top frame visitor for references into client heaps

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Unlike regular marking code we can encounter client references in a
shared GC, so we need a bail out here as well.

Bug: v8:11708, v8:12647
Change-Id: Ie5ccb66206a8dca7d7bb08c75c90ce4999ed5a78
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3483663
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Auto-Submit: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79241}
This commit is contained in:
Dominik Inführ 2022-02-23 14:21:07 +01:00 committed by V8 LUCI CQ
parent d7e6146bc6
commit ca6d783e74
1 changed files with 6 additions and 1 deletions
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7
src/heap/mark-compact.cc
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@ -1180,7 +1180,12 @@ class MarkCompactCollector::CustomRootBodyMarkingVisitor final
V8_INLINE void MarkObject(HeapObject host, Object object) {
if (!object.IsHeapObject()) return;
HeapObject heap_object = HeapObject::cast(object);
if (!collector_->is_shared_heap() && heap_object.InSharedHeap()) return;
// We use this visitor both in client and shared GCs. The client GC should
// not mark objects in the shared heap. In shared GCs we are marking each
// client's top stack frame, so it is actually legal to encounter references
// into the client heap here in a shared GC. We need to bail out in these
// cases as well.
if (collector_->is_shared_heap() != heap_object.InSharedHeap()) return;
collector_->MarkObject(host, heap_object);
}