Expose memory allocator internal stats and properties.

content/app/content_main_runner.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/public/app/content_main_runner.h"
 
 #include <stdlib.h>
 
 #include "base/allocator/allocator_extension.h"
 #include "base/at_exit.h"
@@ skipping 395 matching lines @@
     memset(&sandbox_info_, 0, sizeof(sandbox_info_));
 #endif
   }
 
   ~ContentMainRunnerImpl() {
     if (is_initialized_ && !is_shutdown_)
       Shutdown();
   }
 
 #if defined(USE_TCMALLOC)
+static bool GetPropertyThunk(const char* name, size_t* value) {
+  return MallocExtension::instance()->GetNumericProperty(name, value);
+}
+
 static void GetStatsThunk(char* buffer, int buffer_length) {
   MallocExtension::instance()->GetStats(buffer, buffer_length);
 }
 
 static void ReleaseFreeMemoryThunk() {
   MallocExtension::instance()->ReleaseFreeMemory();
 }
 #endif
 
 
@@ skipping 18 matching lines @@
     // process_util_linux.cc with the definition of
     // EnableTerminationOnOutOfMemory().  That's because base shouldn't have a
     // dependency on TCMalloc.  Really, we ought to have our allocator shim code
     // implement this EnableTerminationOnOutOfMemory() function.  Whateverz.
     // This works for now.
 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
     // For tcmalloc, we need to tell it to behave like new.
     tc_set_new_mode(1);
 
     // On windows, we've already set these thunks up in _heap_init()
+    base::allocator::SetGetPropertyFunction(GetPropertyThunk);
     base::allocator::SetGetStatsFunction(GetStatsThunk);
     base::allocator::SetReleaseFreeMemoryFunction(ReleaseFreeMemoryThunk);
 
     // Provide optional hook for monitoring allocation quantities on a
     // per-thread basis.  Only set the hook if the environment indicates this
     // needs to be enabled.
     const char* profiling = getenv(tracked_objects::kAlternateProfilerTime);
     if (profiling &&
         (atoi(profiling) == tracked_objects::TIME_SOURCE_TYPE_TCMALLOC)) {
       tracked_objects::SetAlternateTimeSource(
@@ skipping 239 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
 };
 
 // static
 ContentMainRunner* ContentMainRunner::Create() {
   return new ContentMainRunnerImpl();
 }
 
 }  // namespace content