Introduce a external allocation limit....

src/heap-inl.h

 // Copyright 2006-2008 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 210 matching lines @@
   if (first_word.IsForwardingAddress()) {
     *p = first_word.ToForwardingAddress();
     return;
   }
 
   // Call the slow part of scavenge object.
   return ScavengeObjectSlow(p, object);
 }
 
 
+int Heap::AdjustAmountOfExternalAllocatedMemory(int change_in_bytes) {
+  ASSERT(HasBeenSetup());
+  int amount = amount_of_external_allocated_memory_ + change_in_bytes;
+  if (change_in_bytes >= 0) {
+    // Avoid overflow.
+    if (amount > amount_of_external_allocated_memory_) {
+      amount_of_external_allocated_memory_ = amount;
+    }
+    int amount_since_last_global_gc =
+        amount_of_external_allocated_memory_ -
+        amount_of_external_allocated_memory_at_last_global_gc_;
+    if (amount_since_last_global_gc > external_allocation_limit_) {
+      CollectAllGarbage();
+    }
+  } else {
+    // Avoid underflow.
+    if (amount >= 0) {
+      amount_of_external_allocated_memory_ = amount;
+    }
+  }
+  ASSERT(amount_of_external_allocated_memory_ >= 0);
+  return amount_of_external_allocated_memory_;
+}
+
+
 void Heap::SetLastScriptId(Object* last_script_id) {
   roots_[kLastScriptIdRootIndex] = last_script_id;
 }
 
 
 #define GC_GREEDY_CHECK() \
   ASSERT(!FLAG_gc_greedy || v8::internal::Heap::GarbageCollectionGreedyCheck())
 
 
 // Calls the FUNCTION_CALL function and retries it up to three times
@@ skipping 53 matching lines @@
   allocation_allowed_ = new_state;
   return old;
 }
 
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_INL_H_