Set process name on Linux

This uses PR_SET_NAME to set the process name.  It was useful in looking at
memory numbers with the zygote patches.  PR_SET_NAME is only avalaible in
kernels >= 2.6.9 according to the man page:

> PR_SET_NAME (since Linux 2.6.9)
>  Set the process name for the calling process, using the value in
>  the location pointed to by (char *) arg2.  The name can be up to
>  16  bytes  long,  and  should  be null terminated if it contains
>  fewer bytes.

shenki@moya ~/src/chromium/src :process-name
$ ps --forest
  PID TTY          TIME CMD
 5581 pts/2    00:00:00 bash
 9559 pts/2    00:00:02  \_ Chromium_Browse
 9573 pts/2    00:00:00  |   \_ Chromium_Render
 9581 pts/2    00:00:02  |   \_ Chromium_Render
 9584 pts/2    00:00:00  |   \_ Chromium_Render

Patch by Joel Stanley.

Review URL: http://codereview.chromium.org/118060


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@18376 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 9 insertions, 0 deletions

diff --git a/chrome/renderer/renderer_main.cc b/chrome/renderer/renderer_main.cc
index fc4d291..7c40767 100644
--- a/chrome/renderer/renderer_main.cc
+++ b/chrome/renderer/renderer_main.cc
@@ -25,6 +25,10 @@
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 
+#if defined(OS_LINUX)
+#include <sys/prctl.h>
+#endif
+
 // This function provides some ways to test crash and assertion handling
 // behavior of the renderer.
 static void HandleRendererErrorTestParameters(const CommandLine& command_line) {
@@ -79,6 +83,11 @@ int RendererMain(const MainFunctionParams& parameters) {
   MessageLoopForIO main_message_loop;
   std::wstring app_name = chrome::kBrowserAppName;
   PlatformThread::SetName(WideToASCII(app_name + L"_RendererMain").c_str());
+#if defined(OS_LINUX)
+  // Set the process name so it is easier to distinguish this process from
+  // others.  The process name will be trimmed to 15 characters.
+  prctl(PR_SET_NAME, WideToASCII(app_name + L"_Renderer").c_str(), 0, 0, 0);
+#endif
 
   // Initialize the SystemMonitor
   base::SystemMonitor::Start();