[v8] don't crash when ArrayBuffer allocation fails

third_party/WebKit/Source/wtf/ArrayBufferContents.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 79 matching lines @@
     ASSERT(!other.m_holder->data());
     other.m_holder = m_holder;
 }
 
 void ArrayBufferContents::copyTo(ArrayBufferContents& other)
 {
     ASSERT(!m_holder->isShared() && !other.m_holder->isShared());
     m_holder->copyMemoryTo(*other.m_holder);
 }
 
+void ArrayBufferContents::allocateMemoryWithFlags(size_t size, InitializationPolicy policy, int flags, void*& data)
+{
+    if (s_adjustAmountOfExternalAllocatedMemoryFunction)
+        s_adjustAmountOfExternalAllocatedMemoryFunction(static_cast<int>(size));
+    data = partitionAllocGenericFlags(WTF::Partitions::bufferPartition(), flags, size, WTF_HEAP_PROFILER_TYPE_NAME(ArrayBufferContents));
+    if (policy == ZeroInitialize && data)
+        memset(data, '\0', size);
+}
+
 void ArrayBufferContents::allocateMemory(size_t size, InitializationPolicy policy, void*& data)
 {
-    if (s_adjustAmountOfExternalAllocatedMemoryFunction)
-        s_adjustAmountOfExternalAllocatedMemoryFunction(static_cast<int>(size));
-    data = partitionAllocGeneric(WTF::Partitions::bufferPartition(), size, WTF_HEAP_PROFILER_TYPE_NAME(ArrayBufferContents));
-    if (policy == ZeroInitialize && data)
-        memset(data, '\0', size);
+    allocateMemoryWithFlags(size, policy, 0, data);
+}
+
+void ArrayBufferContents::allocateMemoryOrNull(size_t size, InitializationPolicy policy, void*& data)
+{
+    allocateMemoryWithFlags(size, policy, PartitionAllocReturnNull, data);
 }
 
 void ArrayBufferContents::freeMemory(void* data, size_t size)
 {
     Partitions::bufferFree(data);
     if (s_adjustAmountOfExternalAllocatedMemoryFunction)
         s_adjustAmountOfExternalAllocatedMemoryFunction(-static_cast<int>(size));
 }
 
 ArrayBufferContents::DataHolder::DataHolder()
@@ skipping 33 matching lines @@
     ASSERT(!other.m_sizeInBytes);
     ArrayBufferContents::freeMemory(other.m_data, other.m_sizeInBytes);
     ArrayBufferContents::allocateMemory(m_sizeInBytes, DontInitialize, other.m_data);
     if (!other.m_data)
         return;
     memcpy(other.m_data, m_data, m_sizeInBytes);
     other.m_sizeInBytes = m_sizeInBytes;
 }
 
 } // namespace WTF