Provide baseline for new GC infrastructure.

src/mark-compact.cc

Index: src/mark-compact.cc
diff --git a/src/mark-compact.cc b/src/mark-compact.cc
index b570db9e348d48726ae6cfd2f2aee3e1c2d53c31..6e79694ac503fa8e3056ad925f438c12f9f8bd83 100644
--- a/src/mark-compact.cc
+++ b/src/mark-compact.cc
@@ -82,6 +82,8 @@ void MarkCompactCollector::CollectGarbage() {
   SweepLargeObjectSpace();
 
   if (IsCompacting()) {
+    ASSERT(!FLAG_new_gc);
+
     GCTracer::Scope gc_scope(tracer_, GCTracer::Scope::MC_COMPACT);
     EncodeForwardingAddresses();
 
@@ -107,6 +109,12 @@ void MarkCompactCollector::CollectGarbage() {
 
 
 void MarkCompactCollector::Prepare(GCTracer* tracer) {
+  if (FLAG_new_gc) {
+    FLAG_flush_code = false;
+    FLAG_always_compact = false;
+    FLAG_never_compact = true;
+  }
+
   // Rather than passing the tracer around we stash it in a static member
   // variable.
   tracer_ = tracer;
@@ -2347,7 +2355,7 @@ void MarkCompactCollector::SweepSpaces() {
   int live_maps = static_cast<int>(live_maps_size / Map::kSize);
   ASSERT(live_map_objects_size_ == live_maps_size);
 
-  if (Heap::map_space()->NeedsCompaction(live_maps)) {
+  if (!FLAG_new_gc && Heap::map_space()->NeedsCompaction(live_maps)) {

[Erik Corry, 2010/12/13 19:58:28]

Shouldnt this be !FLAG_never_compact.  Looks a little like a bug in the old GC.

     MapCompact map_compact(live_maps);
 
     map_compact.CompactMaps();