Age inline caches after context disposal.

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 1462 matching lines @@
   // mark or if we've already filled the bottom 1/16th of the to space,
   // we try to promote this object.
   inline bool ShouldBePromoted(Address old_address, int object_size);
 
   int MaxObjectSizeInNewSpace() { return kMaxObjectSizeInNewSpace; }
 
   void ClearJSFunctionResultCaches();
 
   void ClearNormalizedMapCaches();
 
+  // Clears the cache of ICs related to this map.
+  void ClearCacheOnMap(Map* map) {
+    if (FLAG_cleanup_code_caches_at_gc) {
+      map->ClearCodeCache(this);
+    }
+  }
+
   GCTracer* tracer() { return tracer_; }
 
   // Returns the size of objects residing in non new spaces.
   intptr_t PromotedSpaceSize();
   intptr_t PromotedSpaceSizeOfObjects();
 
   double total_regexp_code_generated() { return total_regexp_code_generated_; }
   void IncreaseTotalRegexpCodeGenerated(int size) {
     total_regexp_code_generated_ += size;
   }
@@ skipping 85 matching lines @@
   }
 
   void SetConstructStubDeoptPCOffset(int pc_offset) {
     ASSERT(construct_stub_deopt_pc_offset() == Smi::FromInt(0));
     set_construct_stub_deopt_pc_offset(Smi::FromInt(pc_offset));
   }
 
   // For post mortem debugging.
   void RememberUnmappedPage(Address page, bool compacted);
 
+  // Global inline caching age: it is incremented on some GCs after context
+  // disposal. We use it to flush inline caches.
+  int global_ic_age() {
+    return global_ic_age_;
+  }
+
+  void AgeInlineCaches() {
+    ++global_ic_age_;
+  }
+
  private:
   Heap();
 
   // This can be calculated directly from a pointer to the heap; however, it is
   // more expedient to get at the isolate directly from within Heap methods.
   Isolate* isolate_;
 
   intptr_t code_range_size_;
   int reserved_semispace_size_;
   int max_semispace_size_;
   int initial_semispace_size_;
   intptr_t max_old_generation_size_;
   intptr_t max_executable_size_;
 
   // For keeping track of how much data has survived
   // scavenge since last new space expansion.
   int survived_since_last_expansion_;
 
   // For keeping track on when to flush RegExp code.
   int sweep_generation_;
 
   int always_allocate_scope_depth_;
   int linear_allocation_scope_depth_;
 
   // For keeping track of context disposals.
   int contexts_disposed_;
 
+  int global_ic_age_;
+
   int scan_on_scavenge_pages_;
 
 #if defined(V8_TARGET_ARCH_X64)
   static const int kMaxObjectSizeInNewSpace = 1024*KB;
 #else
   static const int kMaxObjectSizeInNewSpace = 512*KB;
 #endif
 
   NewSpace new_space_;
   OldSpace* old_pointer_space_;
@@ skipping 1067 matching lines @@
   AssertNoAllocation no_alloc;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG || LIVE_OBJECT_LIST
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_