Track per-class promotion stats.

runtime/vm/heap_test.cc

 // Copyright (c) 2012, 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 "platform/globals.h"
 
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/globals.h"
 #include "vm/heap.h"
@@ skipping 110 matching lines @@
   EXPECT_EQ(2, class_stats->pre_gc.new_count);
   // Only one survived.
   EXPECT_EQ(1, class_stats->post_gc.new_count);
   EXPECT_EQ(0, class_stats->recent.new_count);
   // Perform GC. The following is heavily dependent on the behaviour
   // of the GC: Retained instance of A will be promoted.
   heap->CollectGarbage(Heap::kNew);
   // Verify postconditions:
   EXPECT_EQ(0, class_stats->pre_gc.old_count);
   EXPECT_EQ(0, class_stats->post_gc.old_count);
+  // One promoted instance.
+  EXPECT_EQ(1, class_stats->promoted_count);
   // Promotion counted as an allocation from old space.
   EXPECT_EQ(1, class_stats->recent.old_count);
   // There was one instance allocated before GC.
   EXPECT_EQ(1, class_stats->pre_gc.new_count);
   // There are no instances allocated in new space after GC.
   EXPECT_EQ(0, class_stats->post_gc.new_count);
   // No new allocations.
   EXPECT_EQ(0, class_stats->recent.new_count);
   // Perform a GC on new space.
   heap->CollectGarbage(Heap::kNew);
   // There were no instances allocated before GC.
   EXPECT_EQ(0, class_stats->pre_gc.new_count);
   // There are no instances allocated in new space after GC.
   EXPECT_EQ(0, class_stats->post_gc.new_count);
   // No new allocations.
   EXPECT_EQ(0, class_stats->recent.new_count);
+  // Nothing was promoted.
+  EXPECT_EQ(0, class_stats->promoted_count);
   heap->CollectGarbage(Heap::kOld);
   // Verify postconditions:
   EXPECT_EQ(1, class_stats->pre_gc.old_count);
   EXPECT_EQ(1, class_stats->post_gc.old_count);
   EXPECT_EQ(0, class_stats->recent.old_count);
   // Exit scope, freeing instance.
   Dart_ExitScope();
   // Perform GC.
   heap->CollectGarbage(Heap::kOld);
   // Verify postconditions:
@@ skipping 45 matching lines @@
     }
   }
   {
     NoGCScope no_gc;
     FindNothing find_nothing;
     EXPECT(Object::null() == heap->FindObject(&find_nothing));
   }
 }
 
 }  // namespace dart.