Add run-time CHECK to smoke-test allocator overrides

third_party/tcmalloc/chromium/src/gperftools/tcmalloc.h

 /* Copyright (c) 2003, 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:
- * 
+ *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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@@ skipping 18 matching lines @@
 #ifndef __THROW    /* I guess we're not on a glibc system */
 # define __THROW   /* __THROW is just an optimization, so ok to make it "" */
 #endif
 
 // Define the version number so folks can check against it
 #define TC_VERSION_MAJOR  2
 #define TC_VERSION_MINOR  0
 #define TC_VERSION_PATCH  ""
 #define TC_VERSION_STRING "gperftools 2.0"
 
+// When passed to mallopt() as first argument causes it to return
+// TC_MALLOPT_IS_OVERRIDDEN_BY_TCMALLOC. Used to detect the sanity of the
+// overriding mechanisms at runtime.
+#define TC_MALLOPT_IS_OVERRIDDEN_BY_TCMALLOC 0xbeef42
+
 // For struct mallinfo, it it's defined.
 #ifdef HAVE_STRUCT_MALLINFO
 // Malloc can be in several places on older versions of OS X.
 # if defined(HAVE_MALLOC_H)
 # include <malloc.h>
 # elif defined(HAVE_SYS_MALLOC_H)
 # include <sys/malloc.h>
 # elif defined(HAVE_MALLOC_MALLOC_H)
 # include <malloc/malloc.h>
 # endif
@@ skipping 58 matching lines @@
   PERFTOOLS_DLL_DECL void* tc_newarray(size_t size);
   PERFTOOLS_DLL_DECL void* tc_newarray_nothrow(size_t size,
                                                const std::nothrow_t&) __THROW;
   PERFTOOLS_DLL_DECL void tc_deletearray(void* p) __THROW;
   PERFTOOLS_DLL_DECL void tc_deletearray_nothrow(void* p,
                                                  const std::nothrow_t&) __THROW;
 }
 #endif
 
 #endif  // #ifndef TCMALLOC_TCMALLOC_H_