Attempt to collect more garbage before panicking with out of memory.

src/global-handles.cc

 // Copyright 2009 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 354 matching lines @@
         current->state_ = Node::PENDING;
         LOG(HandleEvent("GlobalHandle::Pending", current->handle().location()));
       }
     }
   }
 }
 
 
 int post_gc_processing_count = 0;
 
-void GlobalHandles::PostGarbageCollectionProcessing() {
+bool GlobalHandles::PostGarbageCollectionProcessing() {
   // Process weak global handle callbacks. This must be done after the
   // GC is completely done, because the callbacks may invoke arbitrary
   // API functions.
   // At the same time deallocate all DESTROYED nodes.
   ASSERT(Heap::gc_state() == Heap::NOT_IN_GC);
   const int initial_post_gc_processing_count = ++post_gc_processing_count;
+  bool next_gc_could_collect_more = false;
   Node** p = &head_;
   while (*p != NULL) {
     if ((*p)->PostGarbageCollectionProcessing()) {
       if (initial_post_gc_processing_count != post_gc_processing_count) {
         // Weak callback triggered another GC and another round of
         // PostGarbageCollection processing.  The current node might
         // have been deleted in that round, so we need to bail out (or
         // restart the processing).
         break;
       }
     }
     if ((*p)->state_ == Node::DESTROYED) {
       // Delete the link.
       Node* node = *p;
       *p = node->next();  // Update the link.
       if (first_deallocated()) {
         first_deallocated()->set_next(node);
       }
       node->set_next_free(first_deallocated());
       set_first_deallocated(node);
+      next_gc_could_collect_more = true;
     } else {
       p = (*p)->next_addr();
     }
   }
   set_first_free(NULL);
   if (first_deallocated()) {
     first_deallocated()->set_next(head());
   }
+
+  return next_gc_could_collect_more;
 }
 
 
 void GlobalHandles::IterateStrongRoots(ObjectVisitor* v) {
   // Traversal of global handles marked as NORMAL.
   for (Node* current = head_; current != NULL; current = current->next()) {
     if (current->state_ == Node::NORMAL) {
       v->VisitPointer(&current->object_);
     }
   }
@@ skipping 99 matching lines @@
 
 void GlobalHandles::RemoveObjectGroups() {
   List<ObjectGroup*>* object_groups = ObjectGroups();
   for (int i = 0; i< object_groups->length(); i++) {
     delete object_groups->at(i);
   }
   object_groups->Clear();
 }
 
 } }  // namespace v8::internal