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Unified Diff: src/heap/incremental-marking-inl.h

Issue 1176243015: Revert of Re-land new insertion write barrier. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 6 months ago
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Index: src/heap/incremental-marking-inl.h
diff --git a/src/heap/incremental-marking-inl.h b/src/heap/incremental-marking-inl.h
index e9cd4191e159ad8270914ff87b915d2facc33dba..42b3dcb127da27fc1ebd937912c43580735dd596 100644
--- a/src/heap/incremental-marking-inl.h
+++ b/src/heap/incremental-marking-inl.h
@@ -15,14 +15,28 @@
Object* value) {
HeapObject* value_heap_obj = HeapObject::cast(value);
MarkBit value_bit = Marking::MarkBitFrom(value_heap_obj);
- // Checking the obj marking state is not necessary, but reduces the marking
- // load.
- MarkBit obj_bit = Marking::MarkBitFrom(obj);
- if (Marking::IsWhite(value_bit) && Marking::IsBlack(obj_bit)) {
- WhiteToGreyAndPush(value_heap_obj, value_bit);
- RestartIfNotMarking();
+ if (Marking::IsWhite(value_bit)) {
+ MarkBit obj_bit = Marking::MarkBitFrom(obj);
+ if (Marking::IsBlack(obj_bit)) {
+ MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address());
+ if (chunk->IsFlagSet(MemoryChunk::HAS_PROGRESS_BAR)) {
+ if (chunk->IsLeftOfProgressBar(slot)) {
+ WhiteToGreyAndPush(value_heap_obj, value_bit);
+ RestartIfNotMarking();
+ } else {
+ return false;
+ }
+ } else {
+ BlackToGreyAndUnshift(obj, obj_bit);
+ RestartIfNotMarking();
+ return false;
+ }
+ } else {
+ return false;
+ }
}
if (!is_compacting_) return false;
+ MarkBit obj_bit = Marking::MarkBitFrom(obj);
return Marking::IsBlack(obj_bit);
}
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