Add more safe points in compiler

runtime/vm/pages.h

 // 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.
 
 #ifndef RUNTIME_VM_PAGES_H_
 #define RUNTIME_VM_PAGES_H_
 
 #include "vm/freelist.h"
 #include "vm/globals.h"
 #include "vm/lockers.h"
@@ skipping 306 matching lines @@
   uword* EndAddress() { return &bump_end_; }
   static intptr_t top_offset() { return OFFSET_OF(PageSpace, bump_top_); }
   static intptr_t end_offset() { return OFFSET_OF(PageSpace, bump_end_); }
 
   void SetupImagePage(void* pointer, uword size, bool is_executable);
 
  private:
   // Ids for time and data records in Heap::GCStats.
   enum {
     // Time
-    kMarkObjects = 0,
-    kResetFreeLists = 1,
-    kSweepPages = 2,
-    kSweepLargePages = 3,
+    kSafePoint = 0,
+    kMarkObjects = 1,
+    kResetFreeLists = 2,
+    kSweepPages = 3,
+    kSweepLargePages = 4,
     // Data
     kGarbageRatio = 0,
     kGCTimeFraction = 1,
     kPageGrowth = 2,
     kAllowedGrowth = 3
   };
 
   static const intptr_t kAllocatablePageSize = 64 * KB;
 
   uword TryAllocateInternal(intptr_t size,
@@ skipping 84 matching lines @@
   friend class HeapIterationScope;
   friend class PageSpaceController;
   friend class SweeperTask;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(PageSpace);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_PAGES_H_