Patch for allowing several V8 instances in process:...

src/zone-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 18 matching lines @@
 #define V8_ZONE_INL_H_
 
 #include "zone.h"
 #include "v8-counters.h"
 
 namespace v8 {
 namespace internal {
 
 
 inline void* Zone::New(int size) {
-  ASSERT(AssertNoZoneAllocation::allow_allocation());
-  ASSERT(ZoneScope::nesting() > 0);
+  ZoneData& zone_data = v8_context()->zone_data_;
+  ASSERT(AssertNoZoneAllocation::allow_allocation(zone_data));
+  ASSERT(ZoneScope::nesting(zone_data) > 0);
   // Round up the requested size to fit the alignment.
   size = RoundUp(size, kAlignment);
 
   // Check if the requested size is available without expanding.
-  Address result = position_;
-  if ((position_ += size) > limit_) result = NewExpand(size);
+  Address result = zone_data.position_;
+  if ((zone_data.position_ += size) > zone_data.limit_)
+    result = NewExpand(size);
 
   // Check that the result has the proper alignment and return it.
   ASSERT(IsAddressAligned(result, kAlignment, 0));
   return reinterpret_cast<void*>(result);
 }
 
 
 template <typename T>
 T* Zone::NewArray(int length) {
   return static_cast<T*>(Zone::New(length * sizeof(T)));
 }
 
 
 bool Zone::excess_allocation() {
-  return segment_bytes_allocated_ > zone_excess_limit_;
+  ZoneData& zone_data = v8_context()->zone_data_;
+  return zone_data.segment_bytes_allocated_ > zone_data.zone_excess_limit_;
 }
 
 
 void Zone::adjust_segment_bytes_allocated(int delta) {
-  segment_bytes_allocated_ += delta;
-  Counters::zone_segment_bytes.Set(segment_bytes_allocated_);
+  V8Context* const v8context = v8_context();
+  ZoneData& zone_data = v8context->zone_data_;
+  zone_data.segment_bytes_allocated_ += delta;
+  COUNTER(zone_segment_bytes).Set(zone_data.segment_bytes_allocated_);
 }
 
 
 template <typename C>
 bool ZoneSplayTree<C>::Insert(const Key& key, Locator* locator) {
   if (is_empty()) {
     // If the tree is empty, insert the new node.
     root_ = new Node(key, C::kNoValue);
   } else {
     // Splay on the key to move the last node on the search path
@@ skipping 210 matching lines @@
     callback->Call(node->key(), node->value());
     nodes_to_visit.Add(node->left());
     nodes_to_visit.Add(node->right());
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ZONE_INL_H_