Only double align in PagedSpace::AllocateRawDoubleAligned when allocation succeeded.

src/heap/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_HEAP_SPACES_INL_H_
 #define V8_HEAP_SPACES_INL_H_
 
 #include "src/heap/spaces.h"
 #include "src/heap-profiler.h"
 #include "src/isolate.h"
@@ skipping 285 matching lines @@
 AllocationResult PagedSpace::AllocateRawDoubleAligned(int size_in_bytes) {
   DCHECK(identity() == OLD_SPACE);
   HeapObject* object = AllocateLinearlyDoubleAlign(size_in_bytes);
   int aligned_size_in_bytes = size_in_bytes + kPointerSize;
 
   if (object == NULL) {
     object = free_list_.Allocate(aligned_size_in_bytes);
     if (object == NULL) {
       object = SlowAllocateRaw(aligned_size_in_bytes);
     }
-    object = heap()->EnsureDoubleAligned(object, aligned_size_in_bytes);
+    if (object != NULL) {
+      object = heap()->EnsureDoubleAligned(object, aligned_size_in_bytes);
+    }
   }
 
   if (object != NULL) {
     MSAN_ALLOCATED_UNINITIALIZED_MEMORY(object->address(), size_in_bytes);
     return object;
   }
 
   return AllocationResult::Retry(identity());
 }
 
@@ skipping 58 matching lines @@
 
 
 intptr_t LargeObjectSpace::Available() {
   return ObjectSizeFor(heap()->isolate()->memory_allocator()->Available());
 }
 
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_SPACES_INL_H_