GTTF: Enable tcmalloc's debugallocation on Windows.

third_party/tcmalloc/chromium/src/debugallocation.cc

Index: third_party/tcmalloc/chromium/src/debugallocation.cc
===================================================================
--- third_party/tcmalloc/chromium/src/debugallocation.cc	(revision 199525)
+++ third_party/tcmalloc/chromium/src/debugallocation.cc	(working copy)
@@ -70,6 +70,7 @@
 #include "addressmap-inl.h"
 #include "base/abort.h"
 #include "base/commandlineflags.h"
+#include "base/compiler_specific.h"

[jar (doing other things), 2013/05/15 00:56:14]

per discussion: kill this line, and then use an ifdef for the static declaration
below (don't bother with the error checking on Windows)... and our port will be
a bit less confusing (since this base include is not the same as the other base
include)

[Paweł Hajdan Jr., 2013/05/15 17:59:46]

Done.

 #include "base/googleinit.h"
 #include "base/logging.h"
 #include "base/spinlock.h"
@@ -127,19 +128,11 @@
             EnvToBool("TCMALLOC_SYMBOLIZE_STACKTRACE", true),
             "Symbolize the stack trace when provided (on some error exits)");
 
-// If we are LD_PRELOAD-ed against a non-pthreads app, then
-// pthread_once won't be defined.  We declare it here, for that
-// case (with weak linkage) which will cause the non-definition to
-// resolve to NULL.  We can then check for NULL or not in Instance.
-extern "C" int pthread_once(pthread_once_t *, void (*)(void))
-    ATTRIBUTE_WEAK;
-
 // ========================================================================= //
 
 // A safe version of printf() that does not do any allocation and
 // uses very little stack space.
-static void TracePrintf(int fd, const char *fmt, ...)
-  __attribute__ ((__format__ (__printf__, 2, 3)));
+static void TracePrintf(int fd, const char *fmt, ...) PRINTF_FORMAT(2, 3);
 
 // The do_* functions are defined in tcmalloc/tcmalloc.cc,
 // which is included before this file
@@ -624,9 +617,7 @@
   }
 
   static void CheckForDanglingWrites(const MallocBlockQueueEntry& queue_entry) {
-    // Initialize the buffer if necessary.
-    if (pthread_once)
-      pthread_once(&deleted_buffer_initialized_, &InitDeletedBuffer);
+    perftools_pthread_once(&deleted_buffer_initialized_, &InitDeletedBuffer);
     if (!deleted_buffer_initialized_no_pthreads_) {
       // This will be the case on systems that don't link in pthreads,
       // including on FreeBSD where pthread_once has a non-zero address