--verify-predictable mode added for ensuring that GC behaves deterministically.

src/spaces-inl.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_SPACES_INL_H_
 #define V8_SPACES_INL_H_
 
 #include "src/heap-profiler.h"
 #include "src/isolate.h"
 #include "src/spaces.h"
@@ skipping 235 matching lines @@
   if (new_top > allocation_info_.limit()) return NULL;
 
   allocation_info_.set_top(new_top);
   return HeapObject::FromAddress(current_top);
 }
 
 
 // Raw allocation.
 AllocationResult PagedSpace::AllocateRaw(int size_in_bytes) {
   HeapObject* object = AllocateLinearly(size_in_bytes);
+
+  if (object == NULL) {
+    object = free_list_.Allocate(size_in_bytes);
+    if (object == NULL) {
+      object = SlowAllocateRaw(size_in_bytes);
+    }
+  }
+
   if (object != NULL) {
     if (identity() == CODE_SPACE) {
       SkipList::Update(object->address(), size_in_bytes);
-    }
-    return object;
-  }
-
-  ASSERT(!heap()->linear_allocation() ||
-         (anchor_.next_chunk() == &anchor_ &&
-          anchor_.prev_chunk() == &anchor_));
-
-  object = free_list_.Allocate(size_in_bytes);
-  if (object != NULL) {
-    if (identity() == CODE_SPACE) {
-      SkipList::Update(object->address(), size_in_bytes);
-    }
-    return object;
-  }
-
-  object = SlowAllocateRaw(size_in_bytes);
-  if (object != NULL) {
-    if (identity() == CODE_SPACE) {
-      SkipList::Update(object->address(), size_in_bytes);
     }
     return object;
   }
 
   return AllocationResult::Retry(identity());
 }
 
 
 // -----------------------------------------------------------------------------
 // NewSpace
@@ skipping 29 matching lines @@
   Map* map = object->map();
   Heap* heap = object->GetHeap();
   return map == heap->raw_unchecked_free_space_map()
       || map == heap->raw_unchecked_one_pointer_filler_map()
       || map == heap->raw_unchecked_two_pointer_filler_map();
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_SPACES_INL_H_