AllocationSite objects weakly linked for traversal

src/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1358 matching lines @@
   void set_native_contexts_list(Object* object) {
     native_contexts_list_ = object;
   }
   Object* native_contexts_list() { return native_contexts_list_; }
 
   void set_array_buffers_list(Object* object) {
     array_buffers_list_ = object;
   }
   Object* array_buffers_list() { return array_buffers_list_; }
 
+  void set_allocation_sites_list(Object* object) {
+    allocation_sites_list_ = object;
+  }
+  Object* allocation_sites_list() { return allocation_sites_list_; }
+  Object** allocation_sites_list_address() { return &allocation_sites_list_; }
 
   // Number of mark-sweeps.
   unsigned int ms_count() { return ms_count_; }
 
   // Iterates over all roots in the heap.
   void IterateRoots(ObjectVisitor* v, VisitMode mode);
   // Iterates over all strong roots in the heap.
   void IterateStrongRoots(ObjectVisitor* v, VisitMode mode);
   // Iterates over all the other roots in the heap.
   void IterateWeakRoots(ObjectVisitor* v, VisitMode mode);
@@ skipping 653 matching lines @@
   intptr_t amount_of_external_allocated_memory_at_last_global_gc_;
 
   // Indicates that an allocation has failed in the old generation since the
   // last GC.
   bool old_gen_exhausted_;
 
   Object* native_contexts_list_;
 
   Object* array_buffers_list_;
 
+  Object* allocation_sites_list_;

[Michael Starzinger, 2013/07/16 18:14:46]

nit: Can we group these three fields together (removing new-lines) and maybe add
a short one-liner comment saying that these are heads of weak-lists?

[mvstanton, 2013/07/16 19:34:57]

Done.

+
   StoreBufferRebuilder store_buffer_rebuilder_;
 
   struct StringTypeTable {
     InstanceType type;
     int size;
     RootListIndex index;
   };
 
   struct ConstantStringTable {
     const char* contents;
@@ skipping 128 matching lines @@
                                           StoreBufferEvent event);
 
   // Performs a major collection in the whole heap.
   void MarkCompact(GCTracer* tracer);
 
   // Code to be run before and after mark-compact.
   void MarkCompactPrologue();
 
   void ProcessNativeContexts(WeakObjectRetainer* retainer, bool record_slots);
   void ProcessArrayBuffers(WeakObjectRetainer* retainer, bool record_slots);
+  void ProcessAllocationSites(WeakObjectRetainer* retainer, bool record_slots);
 
   // Called on heap tear-down.
   void TearDownArrayBuffers();
 
   // Record statistics before and after garbage collection.
   void ReportStatisticsBeforeGC();
   void ReportStatisticsAfterGC();
 
   // Slow part of scavenge object.
   static void ScavengeObjectSlow(HeapObject** p, HeapObject* object);
@@ skipping 877 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_