Version 3.3.8
Added MarkIndependent to the persistent handle API. Independent handles are independent of all other persistent handles and can be garbage collected more frequently.
Implemented the get trap for Harmony proxies. Proxies are enabled with the --harmony-proxies flag.
Performance improvements and bug fixes on all platforms.
R=ager@chromium.org
Review URL: http://codereview.chromium.org/7043003
git-svn-id: http://v8.googlecode.com/svn/trunk@7923 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/heap.cc b/src/heap.cc
index a08e3a3..907ba6b 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -771,11 +771,10 @@
isolate_->counters()->objs_since_last_young()->Set(0);
- if (collector == MARK_COMPACTOR) {
- DisableAssertNoAllocation allow_allocation;
+ { DisableAssertNoAllocation allow_allocation;
GCTracer::Scope scope(tracer, GCTracer::Scope::EXTERNAL);
next_gc_likely_to_collect_more =
- isolate_->global_handles()->PostGarbageCollectionProcessing();
+ isolate_->global_handles()->PostGarbageCollectionProcessing(collector);
}
// Update relocatables.
@@ -935,6 +934,12 @@
}
+static bool IsUnscavengedHeapObject(Heap* heap, Object** p) {
+ return heap->InNewSpace(*p) &&
+ !HeapObject::cast(*p)->map_word().IsForwardingAddress();
+}
+
+
void Heap::Scavenge() {
#ifdef DEBUG
if (FLAG_enable_slow_asserts) VerifyNonPointerSpacePointers();
@@ -1029,6 +1034,11 @@
scavenge_visitor.VisitPointer(BitCast<Object**>(&global_contexts_list_));
new_space_front = DoScavenge(&scavenge_visitor, new_space_front);
+ isolate_->global_handles()->IdentifyWeakIndependentHandles(
+ &IsUnscavengedHeapObject);
+ isolate_->global_handles()->IterateWeakIndependentRoots(&scavenge_visitor);
+ new_space_front = DoScavenge(&scavenge_visitor, new_space_front);
+
UpdateNewSpaceReferencesInExternalStringTable(
&UpdateNewSpaceReferenceInExternalStringTableEntry);
@@ -4492,7 +4502,8 @@
void Heap::IterateWeakRoots(ObjectVisitor* v, VisitMode mode) {
v->VisitPointer(reinterpret_cast<Object**>(&roots_[kSymbolTableRootIndex]));
v->Synchronize("symbol_table");
- if (mode != VISIT_ALL_IN_SCAVENGE) {
+ if (mode != VISIT_ALL_IN_SCAVENGE &&
+ mode != VISIT_ALL_IN_SWEEP_NEWSPACE) {
// Scavenge collections have special processing for this.
external_string_table_.Iterate(v);
}
@@ -4528,16 +4539,24 @@
// Iterate over the builtin code objects and code stubs in the
// heap. Note that it is not necessary to iterate over code objects
// on scavenge collections.
- if (mode != VISIT_ALL_IN_SCAVENGE) {
+ if (mode != VISIT_ALL_IN_SCAVENGE &&
+ mode != VISIT_ALL_IN_SWEEP_NEWSPACE) {
isolate_->builtins()->IterateBuiltins(v);
}
v->Synchronize("builtins");
// Iterate over global handles.
- if (mode == VISIT_ONLY_STRONG) {
- isolate_->global_handles()->IterateStrongRoots(v);
- } else {
- isolate_->global_handles()->IterateAllRoots(v);
+ switch (mode) {
+ case VISIT_ONLY_STRONG:
+ isolate_->global_handles()->IterateStrongRoots(v);
+ break;
+ case VISIT_ALL_IN_SCAVENGE:
+ isolate_->global_handles()->IterateStrongAndDependentRoots(v);
+ break;
+ case VISIT_ALL_IN_SWEEP_NEWSPACE:
+ case VISIT_ALL:
+ isolate_->global_handles()->IterateAllRoots(v);
+ break;
}
v->Synchronize("globalhandles");