Show gpu process stats in about:tcmalloc

content/common/child_thread.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/common/child_thread.h"
 
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/process.h"
 #include "base/string_util.h"
 #include "base/tracked_objects.h"
 #include "content/common/child_process.h"
 #include "content/common/child_process_messages.h"
 #include "content/common/child_trace_message_filter.h"
 #include "content/common/fileapi/file_system_dispatcher.h"
 #include "content/common/quota_dispatcher.h"
 #include "content/common/resource_dispatcher.h"
 #include "content/common/socket_stream_dispatcher.h"
 #include "content/public/common/content_switches.h"
 #include "ipc/ipc_logging.h"
 #include "ipc/ipc_switches.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ipc/ipc_sync_message_filter.h"
 #include "webkit/glue/webkit_glue.h"
 
 #if defined(OS_WIN)
 #include "content/common/handle_enumerator_win.h"
 #endif
 
+#if defined(USE_TCMALLOC)
+#include "third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h"
+#endif
+
 using tracked_objects::ThreadData;
 
 ChildThread::ChildThread() {
   channel_name_ = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
       switches::kProcessChannelID);
   Init();
 }
 
 ChildThread::ChildThread(const std::string& channel_name)
     : channel_name_(channel_name) {
@@ skipping 144 matching lines @@
     IPC_MESSAGE_HANDLER(ChildProcessMsg_Shutdown, OnShutdown)
 #if defined(IPC_MESSAGE_LOG_ENABLED)
     IPC_MESSAGE_HANDLER(ChildProcessMsg_SetIPCLoggingEnabled,
                         OnSetIPCLoggingEnabled)
 #endif
     IPC_MESSAGE_HANDLER(ChildProcessMsg_SetProfilerStatus,
                         OnSetProfilerStatus)
     IPC_MESSAGE_HANDLER(ChildProcessMsg_GetChildProfilerData,
                         OnGetChildProfilerData)
     IPC_MESSAGE_HANDLER(ChildProcessMsg_DumpHandles, OnDumpHandles)
+#if defined(USE_TCMALLOC)
+    IPC_MESSAGE_HANDLER(ChildProcessMsg_GetTcmallocStats, OnGetTcmallocStats)
+#endif
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   if (handled)
     return true;
 
   if (msg.routing_id() == MSG_ROUTING_CONTROL)
     return OnControlMessageReceived(msg);
 
   return router_.OnMessageReceived(msg);
@@ skipping 35 matching lines @@
           CommandLine::ForCurrentProcess()->HasSwitch(
               switches::kAuditAllHandles)));
   handle_enum->EnumerateHandles();
   Send(new ChildProcessHostMsg_DumpHandlesDone);
   return;
 #endif
 
   NOTIMPLEMENTED();
 }
 
+#if defined(USE_TCMALLOC)
+void ChildThread::OnGetTcmallocStats()
+{

[jam, 2012/04/24 20:14:08]

nit: on previous line

+  std::string result;
+  char buffer[1024 * 32];
+  MallocExtension::instance()->GetStats(buffer, sizeof(buffer));
+  result.append(buffer);
+  Send(new ChildProcessHostMsg_TcmallocStats(result));
+}
+#endif
+
 ChildThread* ChildThread::current() {
   return ChildProcess::current()->main_thread();
 }
 
 bool ChildThread::IsWebFrameValid(WebKit::WebFrame* frame) {
   // Return false so that it is overridden in any process in which it is used.
   return false;
 }
 
 void ChildThread::OnProcessFinalRelease() {
   if (on_channel_error_called_) {
     MessageLoop::current()->Quit();
     return;
   }
 
   // The child process shutdown sequence is a request response based mechanism,
   // where we send out an initial feeler request to the child process host
   // instance in the browser to verify if it's ok to shutdown the child process.
   // The browser then sends back a response if it's ok to shutdown. This avoids
   // race conditions if the process refcount is 0 but there's an IPC message
   // inflight that would addref it.
   Send(new ChildProcessHostMsg_ShutdownRequest);
 }