Trigger OOM when zone is full.

src/zone.cc

 // Copyright 2011 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 150 matching lines @@
     DeleteSegment(segment_head_, segment_head_->size());
     segment_head_ = NULL;
   }
 }
 
 
 Address Zone::NewExpand(int size) {
   // Make sure the requested size is already properly aligned and that
   // there isn't enough room in the Zone to satisfy the request.
   ASSERT(size == RoundDown(size, kAlignment));
-  ASSERT(position_ + size > limit_);
+  ASSERT(size > limit_ - position_);
 
   // Compute the new segment size. We use a 'high water mark'
   // strategy, where we increase the segment size every time we expand
   // except that we employ a maximum segment size when we delete. This
   // is to avoid excessive malloc() and free() overhead.
   Segment* head = segment_head_;
   int old_size = (head == NULL) ? 0 : head->size();
   static const int kSegmentOverhead = sizeof(Segment) + kAlignment;
-  int new_size = kSegmentOverhead + size + (old_size << 1);
+  int new_size_no_overhead = size + (old_size << 1);
+  int new_size = kSegmentOverhead + new_size_no_overhead;
+  // Guard against integer overflow.
+  if (new_size_no_overhead < size || new_size < kSegmentOverhead) {
+    V8::FatalProcessOutOfMemory("Zone");
+    return NULL;
+  }
   if (new_size < kMinimumSegmentSize) {
     new_size = kMinimumSegmentSize;
   } else if (new_size > kMaximumSegmentSize) {
     // Limit the size of new segments to avoid growing the segment size
     // exponentially, thus putting pressure on contiguous virtual address space.
     // All the while making sure to allocate a segment large enough to hold the
     // requested size.
     new_size = Max(kSegmentOverhead + size, kMaximumSegmentSize);
   }
   Segment* segment = NewSegment(new_size);
   if (segment == NULL) {
     V8::FatalProcessOutOfMemory("Zone");
     return NULL;
   }
 
   // Recompute 'top' and 'limit' based on the new segment.
   Address result = RoundUp(segment->start(), kAlignment);
   position_ = result + size;
+  // Check for address overflow.
+  if (position_ < result) {
+    V8::FatalProcessOutOfMemory("Zone");
+    return NULL;
+  }
   limit_ = segment->end();
   ASSERT(position_ <= limit_);
   return result;
 }
 
 
 } }  // namespace v8::internal