[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, 30 insertions, 1 deletions

diff --git a/libiberty/configure b/libiberty/configure
index 9a3b2d3..7ff7792 100755
--- a/libiberty/configure
+++ b/libiberty/configure
@@ -5276,6 +5276,7 @@ funcs="$funcs vprintf"
 funcs="$funcs vsnprintf"
 funcs="$funcs vsprintf"
 funcs="$funcs waitpid"
+funcs="$funcs setproctitle"
 
 # Also in the old function.def file: alloca, vfork, getopt.
 
@@ -5298,7 +5299,8 @@ if test "x" = "y"; then
     on_exit \
     psignal pstat_getdynamic pstat_getstatic putenv \
     random realpath rename rindex \
-    sbrk setenv sigsetmask snprintf stpcpy stpncpy strcasecmp strchr strdup \
+    sbrk setenv setproctitle sigsetmask snprintf stpcpy stpncpy strcasecmp strchr \
+    strdup \
      strerror strncasecmp strndup strrchr strsignal strstr strtod strtol \
      strtoul strverscmp sysconf sysctl sysmp \
     table times tmpnam \
@@ -5704,6 +5706,33 @@ fi
 
 
 
+# check for prctl PR_SET_NAME
+if test "$cross_compiling" = yes; then :
+  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error "cannot run test program while cross compiling
+See \`config.log' for more details." "$LINENO" 5; }
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#include <sys/prctl.h>
+int main()
+{
+  return (prctl(PR_SET_NAME, "foo") == 0) ? 0 : 1;
+}
+
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+
+$as_echo "#define HAVE_PRCTL_SET_NAME 1" >>confdefs.h
+
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+  conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+
 case "${host}" in
   *-*-cygwin* | *-*-mingw*)
     $as_echo "#define HAVE_SYS_ERRLIST 1" >>confdefs.h