On store buffer overflow we mark individidual pages for...

src/spaces-inl.h

 // 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 95 matching lines @@
   int id = GetChunkId(page);
   OS::Unprotect(chunks_[id].address(), chunks_[id].size(),
                 chunks_[id].owner()->executable() == EXECUTABLE);
 }
 
 #endif
 
 
 // --------------------------------------------------------------------------
 // PagedSpace
-
-bool PagedSpace::Contains(Address addr) {
-  Page* p = Page::FromAddress(addr);
-  if (!p->is_valid()) return false;
-  return p->owner() == this;
-}
-
-
 Page* Page::Initialize(MemoryChunk* chunk,
                        Executability executable,
                        PagedSpace* owner) {
   Page* page = reinterpret_cast<Page*>(chunk);
   MemoryChunk::Initialize(reinterpret_cast<Address>(chunk),
                           kPageSize,
                           executable,
                           owner);
   owner->IncreaseCapacity(Page::kObjectAreaSize);
   owner->Free(page->ObjectAreaStart(),
               page->ObjectAreaEnd() - page->ObjectAreaStart());
   return page;
 }
 
 
+bool PagedSpace::Contains(Address addr) {
+  Page* p = Page::FromAddress(addr);
+  if (!p->is_valid()) return false;
+  return p->owner() == this;
+}
+
+
+MemoryChunk* MemoryChunk::FromAnyPointerAddress(Address addr) {
+  MemoryChunk* maybe = reinterpret_cast<MemoryChunk*>(
+      OffsetFrom(addr) & ~Page::kPageAlignmentMask);
+  if (maybe->owner() != NULL) return maybe;
+  LargeObjectIterator iterator(Heap::lo_space());
+  for (HeapObject* o = iterator.next(); o != NULL; o = iterator.next()) {
+    // Fixed arrays are the only pointer-containing objects in large object
+    // space.
+    if (o->IsFixedArray()) {
+      MemoryChunk* chunk = MemoryChunk::FromAddress(o->address());
+      if (chunk->Contains(addr)) {
+        return chunk;
+      }
+    }
+  }
+  UNREACHABLE();
+  return NULL;
+}
+
+
+PointerChunkIterator::PointerChunkIterator()
+    : state_(kOldPointerState),
+      old_pointer_iterator_(Heap::old_pointer_space()),
+      map_iterator_(Heap::map_space()),
+      lo_iterator_(Heap::lo_space()) { }
+
+
 Page* Page::next_page() {
   ASSERT(next_chunk()->owner() == owner());
   return static_cast<Page*>(next_chunk());
 }
 
 
 Page* Page::prev_page() {
   ASSERT(prev_chunk()->owner() == owner());
   return static_cast<Page*>(prev_chunk());
 }
@@ skipping 89 matching lines @@
 
 bool FreeListNode::IsFreeListNode(HeapObject* object) {
   return object->map() == Heap::raw_unchecked_free_space_map()
       || object->map() == Heap::raw_unchecked_one_pointer_filler_map()
       || object->map() == Heap::raw_unchecked_two_pointer_filler_map();
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_SPACES_INL_H_