Track JS allocations as they arrive with no affection on performance when tracking is switched off

src/spaces.h

Index: src/spaces.h
diff --git a/src/spaces.h b/src/spaces.h
index aa864b66ba591f2ff4046834be81ddf68aa9c699..f2c209edc63940e00c1f8f224106ff7d80c38bd2 100644
--- a/src/spaces.h
+++ b/src/spaces.h
@@ -1699,6 +1699,7 @@ class PagedSpace : public Space {
   // Allocate the requested number of bytes in the space if possible, return a
   // failure object if not.
   MUST_USE_RESULT inline MaybeObject* AllocateRaw(int size_in_bytes);

[Hannes Payer (out of office), 2013/08/28 09:51:32]

Instead of adding multiple allocation methods to space, can we do
AllocateRaw(int size_in_bytes, AllocationType event);? Where AllocationType is
an enum that encodes the type of allocation (new allocation or migration).

[Alexandra Mikhaylova, 2013/09/24 14:56:20]

Done.

+  MUST_USE_RESULT inline MaybeObject* AllocateRawForMigration(int size_in_bytes);

[loislo, 2013/08/27 09:04:57]

style: 80 symbols

[Alexandra Mikhaylova, 2013/09/19 16:03:38]

Done.

 
   virtual bool ReserveSpace(int bytes);
 
@@ -1879,6 +1880,9 @@ class PagedSpace : public Space {
 
   friend class PageIterator;
   friend class SweeperThread;
+
+ private:
+  inline HeapObject* AllocateRawHelper(int size_in_bytes);
 };