VERIFY_PREDICTABLE build mode introduced. Shadow pages support added.

src/spaces-inl.h

Index: src/spaces-inl.h
diff --git a/src/spaces-inl.h b/src/spaces-inl.h
index eba52c694919df382a527454c2cffef6f064e5c8..f77d90af92dd012777b4b53cc89aaab431eaf225 100644
--- a/src/spaces-inl.h
+++ b/src/spaces-inl.h
@@ -253,26 +253,19 @@ HeapObject* PagedSpace::AllocateLinearly(int size_in_bytes) {
 // Raw allocation.
 AllocationResult PagedSpace::AllocateRaw(int size_in_bytes) {
   HeapObject* object = AllocateLinearly(size_in_bytes);
-  if (object != NULL) {
-    if (identity() == CODE_SPACE) {
-      SkipList::Update(object->address(), size_in_bytes);
-    }
-    return object;
-  }
 
-  ASSERT(!heap()->linear_allocation() ||
+  ASSERT((object == NULL) ||
+         !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);
+  if (object == NULL) {
+    object = free_list_.Allocate(size_in_bytes);
+    if (object == NULL) {
+      object = SlowAllocateRaw(size_in_bytes);
     }
-    return object;
   }
 
-  object = SlowAllocateRaw(size_in_bytes);
   if (object != NULL) {
     if (identity() == CODE_SPACE) {
       SkipList::Update(object->address(), size_in_bytes);