AuroraMiddleware/v8
1
0
Fork 0
Code Issues 2 Pull Requests Releases Wiki Activity

Fix missing write-barrier for prototype transitions.

Browse Source 
R=vegorov@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9150041

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10451 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
mstarzinger@chromium.org 2012-01-19 18:50:01 +00:00
parent 8e7194e62e
commit dffb78e312
1 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/mark-compact.cc
View File

@ -2304,18 +2304,24 @@ void MarkCompactCollector::ClearNonLiveTransitions() {
Object* prototype = prototype_transitions->get(proto_offset + i * step);
Object* cached_map = prototype_transitions->get(map_offset + i * step);
if (IsMarked(prototype) && IsMarked(cached_map)) {
int proto_index = proto_offset + new_number_of_transitions * step;
int map_index = map_offset + new_number_of_transitions * step;
if (new_number_of_transitions != i) {
prototype_transitions->set_unchecked(
heap_,
proto_offset + new_number_of_transitions * step,
proto_index,
prototype,
UPDATE_WRITE_BARRIER);
prototype_transitions->set_unchecked(
heap_,
map_offset + new_number_of_transitions * step,
map_index,
cached_map,
SKIP_WRITE_BARRIER);
}
Object** slot =
HeapObject::RawField(prototype_transitions,
FixedArray::OffsetOfElementAt(proto_index));
RecordSlot(slot, slot, prototype);
new_number_of_transitions++;
}
}