[heap] Add basic infrastructure for Minor Mark-Compact collector

src/global-handles.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/global-handles.h"
 
 #include "src/api.h"
 #include "src/v8.h"
 #include "src/vm-state-inl.h"
 
@@ skipping 1044 matching lines @@
   bool synchronous_second_pass =
       (gc_callback_flags &
        (kGCCallbackFlagForced | kGCCallbackFlagCollectAllAvailableGarbage |
         kGCCallbackFlagSynchronousPhantomCallbackProcessing)) != 0;
   freed_nodes += DispatchPendingPhantomCallbacks(synchronous_second_pass);
   if (initial_post_gc_processing_count != post_gc_processing_count_) {
     // If the callbacks caused a nested GC, then return.  See comment in
     // PostScavengeProcessing.
     return freed_nodes;
   }
-  if (collector == SCAVENGER) {
+  if (Heap::IsYoungGenerationCollector(collector)) {
     freed_nodes += PostScavengeProcessing(initial_post_gc_processing_count);
   } else {
     freed_nodes += PostMarkSweepProcessing(initial_post_gc_processing_count);
   }
   if (initial_post_gc_processing_count != post_gc_processing_count_) {
     // If the callbacks caused a nested GC, then return.  See comment in
     // PostScavengeProcessing.
     return freed_nodes;
   }
   if (initial_post_gc_processing_count == post_gc_processing_count_) {
@@ skipping 375 matching lines @@
   blocks_[block][offset] = object;
   if (isolate->heap()->InNewSpace(object)) {
     new_space_indices_.Add(size_);
   }
   *index = size_++;
 }
 
 
 }  // namespace internal
 }  // namespace v8