[PATCH] Report LTO phase in lto1 process name v2

On larger parallel WHOPR builds I find it useful to see in top which
phase a given lto1 is in.

Set the process name to lto1-wpa, lto1-ltrans, lto1-lto depending
on the current mode.

This is currently only implemented for Linux and only
using the "comm" process name, which is reported in top.

v2: Moved function to libiberty, renamed setproctitle to match
BSD. In theory it should pick up BSD's libc function for this
on a BSD system, but I haven't tested this.

gcc/lto/

2010-10-06  Andi Kleen <ak@linux.intel.com>

	* lto.c (lto_process_name): Add.
	(lto_main): Call lto_process_name.

include/

2010-10-06  Andi Kleen <ak@linux.intel.com>

	* libiberty.h (setproctitle): Add prototype.

libiberty/

2010-10-06  Andi Kleen <ak@linux.intel.com>

	* Makefile.in (CFILES): Add setproctitle.
	(CONFIGURED_OFILES): Add setproctitle.
	(setproctitle): Add rule.
	* config.in: Regenerate.
	* configure: Regenerate.
	* configure.ac: Add checks for prctl PR_SET_NAME and setproctitle.
	* setproctitle.c: Add file.
	* functions.texi: Regenerate.

From-SVN: r165066

1 files changed, 47 insertions, 0 deletions

diff --git a/libiberty/setproctitle.c b/libiberty/setproctitle.c
new file mode 100644
index 00000000000..b176b41f949
--- /dev/null
+++ b/libiberty/setproctitle.c
@@ -0,0 +1,47 @@
+/* Set the title of a process.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+
+This file is part of the libiberty library.
+Libiberty is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+Libiberty is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with libiberty; see the file COPYING.LIB.  If not,
+write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+Boston, MA 02110-1301, USA.  */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#ifdef HAVE_PRCTL_SET_NAME
+#include <sys/prctl.h>
+#endif
+#include "ansidecl.h"
+
+/*
+
+@deftypefn Supplemental void setproctitle(const char *@var{fmt} ...)
+
+Set the title of a process to @var{fmt}. va args not supported for now,
+but defined for compatibility with BSD. 
+
+@end deftypefn
+
+*/
+
+void
+setproctitle (const char *name ATTRIBUTE_UNUSED, ...)
+{
+#ifdef HAVE_PRCTL_SET_NAME
+  /* On Linux this sets the top visible "comm", but not necessarily
+     the name visible in ps. */
+  prctl (PR_SET_NAME, name);
+#endif
+}