Test for codegen of RELEASE_ASSERT vs CHECK in WTF

third_party/WebKit/Source/wtf/text/CString.cpp

 /*
  * Copyright (C) 2003, 2006, 2008, 2009, 2010, 2012 Apple 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 32 matching lines @@
 
   // The +1 is for the terminating NUL character.
   size_t size = sizeof(CStringImpl) + length + 1;
   CStringImpl* buffer = static_cast<CStringImpl*>(
       Partitions::bufferMalloc(size, WTF_HEAP_PROFILER_TYPE_NAME(CStringImpl)));
   data = reinterpret_cast<char*>(buffer + 1);
   data[length] = '\0';
   return adoptRef(new (buffer) CStringImpl(length));
 }
 
+PassRefPtr<CStringImpl> CStringImpl::createUninitializedCHECK(size_t length,
+                                                              char*& data) {
+  // TODO(esprehn): This doesn't account for the NUL.
+  CHECK_LT(length, (numeric_limits<unsigned>::max() - sizeof(CStringImpl)));
+
+  // The +1 is for the terminating NUL character.
+  size_t size = sizeof(CStringImpl) + length + 1;
+  CStringImpl* buffer = static_cast<CStringImpl*>(
+      Partitions::bufferMalloc(size, WTF_HEAP_PROFILER_TYPE_NAME(CStringImpl)));
+  data = reinterpret_cast<char*>(buffer + 1);
+  data[length] = '\0';
+  return adoptRef(new (buffer) CStringImpl(length));
+}
+
 void CStringImpl::operator delete(void* ptr) {
   Partitions::bufferFree(ptr);
 }
 
 CString::CString(const char* chars, size_t length) {
   if (!chars) {
     DCHECK_EQ(length, 0u);
     return;
   }
   char* data;
-  m_buffer = CStringImpl::createUninitialized(length, data);
+  if (rand() % 2) {
+    m_buffer = CStringImpl::createUninitialized(length, data);
+  } else {
+    m_buffer = CStringImpl::createUninitializedCHECK(length, data);
+  }
   memcpy(data, chars, length);
 }
 
 bool CString::isSafeToSendToAnotherThread() const {
   return !m_buffer || m_buffer->hasOneRef();
 }
 
 bool operator==(const CString& a, const CString& b) {
   if (a.isNull() != b.isNull())
     return false;
@@ skipping 46 matching lines @@
           ostream.setf(std::ios::uppercase);
           ostream << (character & 0xff);
         }
         break;
     }
   }
   return ostream << '"';
 }
 
 }  // namespace WTF