Adds TCMalloc support for Android.

third_party/tcmalloc/chromium/src/maybe_threads.cc

Index: third_party/tcmalloc/chromium/src/maybe_threads.cc
diff --git a/third_party/tcmalloc/chromium/src/maybe_threads.cc b/third_party/tcmalloc/chromium/src/maybe_threads.cc
index 15c8a23dcb3509549ef6b45531f2418e988a3cf5..d7e5ce0573817a109307831464fd0e8505a46c70 100644
--- a/third_party/tcmalloc/chromium/src/maybe_threads.cc
+++ b/third_party/tcmalloc/chromium/src/maybe_threads.cc
@@ -1,10 +1,10 @@
 // Copyright (c) 2005, Google Inc.
 // All rights reserved.
-// 
+//

[Dai Mikurube (NOT FULLTIME), 2013/05/03 08:53:00]

nit: unnecessary deletion

[bulach, 2013/05/07 14:55:51]

Done.

 // 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
@@ -14,7 +14,7 @@
 //     * 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
@@ -124,7 +124,9 @@ int perftools_pthread_once(pthread_once_t *ctl,
   if (pthread_once) {
     return pthread_once(ctl, init_routine);
   } else {
-    if (memcmp(ctl, &pthread_once_init, sizeof(*ctl)) == 0) {
+    if (memcmp((const void*)(ctl),
+               (const void*)(&pthread_once_init),
+               sizeof(*ctl)) == 0) {

[Dai Mikurube (NOT FULLTIME), 2013/05/03 08:53:00]

Is it necessary for Android?

[bulach, 2013/05/07 14:55:51]

yep.. memcmp takes "const void*", the arguments here are "void volatile*" and
fails with:
maybe_threads.cc:129:28: error: invalid conversion from 'void volatile*' to
'void const*' [-fpermissive]
/usr/local/google/code/clankium-master/src/third_party/android_tools/ndk//platforms/android-14/arch-arm/usr/include/../include/string.h:40:15:
error:   initializing argument 2 of 'int memcmp(void const*, void const*,
size_t)' [-fpermissive]

       init_routine();
       ++*(char*)(ctl);        // make it so it's no longer equal to init
     }