- Implement the old sweeper.

vm/heap.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/heap.h"
 
 #include "vm/assert.h"
 #include "vm/compiler_stats.h"
 #include "vm/flags.h"
 #include "vm/isolate.h"
 #include "vm/os.h"
 #include "vm/pages.h"
 #include "vm/scavenger.h"
 #include "vm/utils.h"
 #include "vm/verifier.h"
 #include "vm/virtual_memory.h"
 
 namespace dart {
 
 DEFINE_FLAG(bool, verbose_gc, false, "Enables verbose GC.");
+DEFINE_FLAG(bool, verify_before_gc, false,
+            "Enables heap verification before GC.");
+DEFINE_FLAG(bool, verify_after_gc, false,
+            "Enables heap verification after GC.");
 DEFINE_FLAG(bool, gc_at_alloc, false, "GC at every allocation.");
 DEFINE_FLAG(int, new_gen_heap_size, 32, "new gen heap size in MB,"
             "e.g: --new_gen_heap_size=64 allocates a 64MB new gen heap");
 DEFINE_FLAG(int, old_gen_heap_size, Heap::kHeapSizeInMB,
             "old gen heap size in MB,"
             "e.g: --old_gen_heap_size=1024 allocates a 1024MB old gen heap");
 DEFINE_FLAG(int, code_heap_size, Heap::kCodeHeapSizeInMB,
             "code heap size in MB,"
             "e.g: --code_heap_size=8 allocates a 8MB old gen heap");
 
@@ skipping 76 matching lines @@
   new_space_->VisitObjectPointers(visitor);
 }
 
 
 void Heap::IterateOldPointers(ObjectPointerVisitor* visitor) {
   old_space_->VisitObjectPointers(visitor);
   code_space_->VisitObjectPointers(visitor);
 }
 
 
+void Heap::IterateCodePointers(ObjectPointerVisitor* visitor) {
+  code_space_->VisitObjectPointers(visitor);
+}
+
+
 void Heap::CollectGarbage(Space space) {
   switch (space) {
     case kNew:
       new_space_->Scavenge();
       break;
     case kOld:
       old_space_->MarkSweep();
       break;
     case kExecutable:
       UNIMPLEMENTED();
@@ skipping 45 matching lines @@
   isolate()->IncrementNoGCScopeDepth();
 }
 
 
 NoGCScope::~NoGCScope() {
   isolate()->DecrementNoGCScopeDepth();
 }
 #endif  // defined(DEBUG)
 
 }  // namespace dart