Add ability to disable inline bump-pointer allocation.

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 1528 matching lines @@
     limit += new_space_.Capacity();
     // TODO(hpayer): Can be removed when when pretenuring is supported for all
     // allocation sites.
     if (IsHighSurvivalRate() && IsStableOrIncreasingSurvivalTrend()) {
       limit *= 2;
     }
     intptr_t halfway_to_the_max = (old_gen_size + max_old_generation_size_) / 2;
     return Min(limit, halfway_to_the_max);
   }
 
+  // Indicates whether inline bump-pointer allocation has been disabled.
+  bool inline_allocation_disabled() { return inline_allocation_disabled_; }
+
+  // Switch whether inline bump-pointer allocation should be used.
+  void EnableInlineAllocation();
+  void DisableInlineAllocation();
+
   // Implements the corresponding V8 API function.
   bool IdleNotification(int hint);
 
   // Declare all the root indices.
   enum RootListIndex {
 #define ROOT_INDEX_DECLARATION(type, name, camel_name) k##camel_name##RootIndex,
     STRONG_ROOT_LIST(ROOT_INDEX_DECLARATION)
 #undef ROOT_INDEX_DECLARATION
 
 #define STRING_INDEX_DECLARATION(name, str) k##name##RootIndex,
@@ skipping 426 matching lines @@
   // by global handles
   intptr_t amount_of_external_allocated_memory_;
 
   // Caches the amount of external memory registered at the last global gc.
   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_;
 
+  // Indicates that inline bump-pointer allocation has been globally disabled
+  // for all spaces. This is used to disable allocations in generated code.
+  bool inline_allocation_disabled_;
+
   // Weak list heads, threaded through the objects.
   // List heads are initilized lazily and contain the undefined_value at start.
   Object* native_contexts_list_;
   Object* array_buffers_list_;
   Object* allocation_sites_list_;
 
   // WeakHashTable that maps objects embedded in optimized code to dependent
   // code list. It is initilized lazily and contains the undefined_value at
   // start.
   Object* weak_object_to_code_table_;
@@ skipping 1072 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_