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Unified Diff: src/mark-compact.cc

Issue 283383006: Inobject slack tracking is done on a per-closure basis instead of per-shared info basis. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Addressing review comments Created 6 years, 7 months ago
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Index: src/mark-compact.cc
diff --git a/src/mark-compact.cc b/src/mark-compact.cc
index ff6d2e304937c71dec099fb5f8fd1de5be207315..b3fe634a0fa1804c153997b860c4a651d250a65a 100644
--- a/src/mark-compact.cc
+++ b/src/mark-compact.cc
@@ -417,8 +417,6 @@ void MarkCompactCollector::CollectGarbage() {
SweepSpaces();
- if (!FLAG_collect_maps) ReattachInitialMaps();
-
#ifdef DEBUG
if (FLAG_verify_native_context_separation) {
VerifyNativeContextSeparation(heap_);
@@ -2533,23 +2531,6 @@ void MarkCompactCollector::ProcessMapCaches() {
}
-void MarkCompactCollector::ReattachInitialMaps() {
- HeapObjectIterator map_iterator(heap()->map_space());
- for (HeapObject* obj = map_iterator.Next();
- obj != NULL;
- obj = map_iterator.Next()) {
- Map* map = Map::cast(obj);
-
- STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE);
- if (map->instance_type() < FIRST_JS_RECEIVER_TYPE) continue;
-
- if (map->attached_to_shared_function_info()) {
- JSFunction::cast(map->constructor())->shared()->AttachInitialMap(map);
- }
- }
-}
-
-
void MarkCompactCollector::ClearNonLiveReferences() {
// Iterate over the map space, setting map transitions that go from
// a marked map to an unmarked map to null transitions. This action
@@ -2563,13 +2544,6 @@ void MarkCompactCollector::ClearNonLiveReferences() {
if (!map->CanTransition()) continue;
MarkBit map_mark = Marking::MarkBitFrom(map);
- if (map_mark.Get() && map->attached_to_shared_function_info()) {
- // This map is used for inobject slack tracking and has been detached
- // from SharedFunctionInfo during the mark phase.
- // Since it survived the GC, reattach it now.
- JSFunction::cast(map->constructor())->shared()->AttachInitialMap(map);
- }
-
ClearNonLivePrototypeTransitions(map);
ClearNonLiveMapTransitions(map, map_mark);
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