Improved GC statistics (cumulative and per collection).

src/mark-compact.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 60 matching lines @@
   // Tell the tracer.
   if (IsCompacting()) tracer_->set_is_compacting();
 
   MarkLiveObjects();
 
   if (FLAG_collect_maps) ClearNonLiveTransitions();
 
   SweepLargeObjectSpace();
 
   if (IsCompacting()) {
+    GCTracer::Scope gc_scope(tracer_, GCTracer::Scope::MC_COMPACT);
     EncodeForwardingAddresses();
 
     UpdatePointers();
 
     RelocateObjects();
 
     RebuildRSets();
 
   } else {
     SweepSpaces();
@@ skipping 580 matching lines @@
   ASSERT(marking_stack.is_empty());
   while (work_to_do) {
     MarkObjectGroups();
     work_to_do = !marking_stack.is_empty();
     ProcessMarkingStack(visitor);
   }
 }
 
 
 void MarkCompactCollector::MarkLiveObjects() {
+  GCTracer::Scope gc_scope(tracer_, GCTracer::Scope::MC_MARK);
 #ifdef DEBUG
   ASSERT(state_ == PREPARE_GC);
   state_ = MARK_LIVE_OBJECTS;
 #endif
   // The to space contains live objects, the from space is used as a marking
   // stack.
   marking_stack.Initialize(Heap::new_space()->FromSpaceLow(),
                            Heap::new_space()->FromSpaceHigh());
 
   ASSERT(!marking_stack.overflowed());
@@ skipping 465 matching lines @@
 
 static bool TryPromoteObject(HeapObject* object, int object_size) {
   Object* result;
 
   if (object_size > Heap::MaxObjectSizeInPagedSpace()) {
     result = Heap::lo_space()->AllocateRawFixedArray(object_size);
     if (!result->IsFailure()) {
       HeapObject* target = HeapObject::cast(result);
       MigrateObject(target->address(), object->address(), object_size);
       Heap::UpdateRSet(target);
+      MarkCompactCollector::tracer()->
+          increment_promoted_objects_size(object_size);
       return true;
     }
   } else {
     OldSpace* target_space = Heap::TargetSpace(object);
 
     ASSERT(target_space == Heap::old_pointer_space() ||
            target_space == Heap::old_data_space());
     result = target_space->AllocateRaw(object_size);
     if (!result->IsFailure()) {
       HeapObject* target = HeapObject::cast(result);
       MigrateObject(target->address(), object->address(), object_size);
       if (target_space == Heap::old_pointer_space()) {
         Heap::UpdateRSet(target);
       }
+      MarkCompactCollector::tracer()->
+          increment_promoted_objects_size(object_size);
       return true;
     }
   }
 
   return false;
 }
 
 
 static void SweepNewSpace(NewSpace* space) {
   Heap::CheckNewSpaceExpansionCriteria();
@@ skipping 538 matching lines @@
          obj != NULL; obj = map_to_evacuate_it_.next())
       ASSERT(FreeListNode::IsFreeListNode(obj));
   }
 #endif
 };
 
 MapCompact::MapUpdatingVisitor MapCompact::map_updating_visitor_;
 
 
 void MarkCompactCollector::SweepSpaces() {
+  GCTracer::Scope gc_scope(tracer_, GCTracer::Scope::MC_SWEEP);
+
   ASSERT(state_ == SWEEP_SPACES);
   ASSERT(!IsCompacting());
   // Noncompacting collections simply sweep the spaces to clear the mark
   // bits and free the nonlive blocks (for old and map spaces).  We sweep
   // the map space last because freeing non-live maps overwrites them and
   // the other spaces rely on possibly non-live maps to get the sizes for
   // non-live objects.
   SweepSpace(Heap::old_pointer_space(), &DeallocateOldPointerBlock);
   SweepSpace(Heap::old_data_space(), &DeallocateOldDataBlock);
   SweepSpace(Heap::code_space(), &DeallocateCodeBlock);
@@ skipping 562 matching lines @@
 #ifdef ENABLE_LOGGING_AND_PROFILING
   if (obj->IsCode()) {
     PROFILE(CodeDeleteEvent(obj->address()));
   } else if (obj->IsJSFunction()) {
     PROFILE(FunctionDeleteEvent(obj->address()));
   }
 #endif
 }
 
 } }  // namespace v8::internal