--verify-predictable mode added for ensuring that GC behaves deterministically.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index ccf212b4ed6726d5f355f135a9fa0ab7d0ccdeec..e4928d3f2d9eb50ef2ee843de015a4b99aee5429 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -976,6 +976,9 @@ class Heap {
 #endif
   }
 
+  // Number of allocations done so far.

[Hannes Payer (out of office), 2014/06/09 15:23:51]

"runtime allocations"

[Igor Sheludko, 2014/06/10 08:22:54]

Done.

+  uint32_t allocations_count() { return allocations_count_; }
+
   // Print short heap statistics.
   void PrintShortHeapStatistics();
 
@@ -1436,6 +1439,12 @@ class Heap {
   static void FatalProcessOutOfMemory(const char* location,
                                       bool take_snapshot = false);
 
+  // This event is triggered after each successful allocation made by runtime.
+  // It could be allocation either of new object or of a target space for object
+  // evacuation. In order to track ALL allocations one must turn off
+  // FLAG_inline_new and FLAG_use_allocation_folding.
+  inline void OnAllocationEvent(HeapObject* object, int size_in_bytes);
+
  protected:
   // Methods made available to tests.
 
@@ -1551,6 +1560,10 @@ class Heap {
   // Returns the amount of external memory registered since last global gc.
   int64_t PromotedExternalMemorySize();
 
+  uint32_t allocations_count_;  // how many allocations happened

[Hannes Payer (out of office), 2014/06/09 15:23:51]

Style guide: Each comment should start in a new line, upper case, ending with a
".".  Since you are here you can also change ms_count_ and gc_count_.

[Igor Sheludko, 2014/06/10 08:22:54]

Done.

+  uint32_t raw_allocations_hash_;  // running hash over allocations performed
+  uint32_t dump_allocations_hash_countdown_;  // dump allocation hash when 0
+
   unsigned int ms_count_;  // how many mark-sweep collections happened
   unsigned int gc_count_;  // how many gc happened
 
@@ -2086,6 +2099,9 @@ class Heap {
     return &weak_object_to_code_table_;
   }
 
+  inline void UpdateAllocationsHash(uint32_t value);
+  inline void PrintAlloctionsHash();
+
   static const int kInitialStringTableSize = 2048;
   static const int kInitialEvalCacheSize = 64;
   static const int kInitialNumberStringCacheSize = 256;