1 files changed, 47 insertions, 0 deletions
diff --git a/csu/gmon-start.c b/csu/gmon-start.c
new file mode 100644
index 0000000000..c9d51b113b
--- /dev/null
+++ b/csu/gmon-start.c
@@ -0,0 +1,47 @@
+/* Code to enable profiling at program startup.
+Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library 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.
+
+The GNU C Library 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 the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sys/types.h>
+#include <sys/gmon.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+/* Beginning and end of our code segment.  */
+extern void _start (), etext ();
+
+/* These functions are defined in gmon/gmon.c;
+   they do all the work of setting up and cleaning up profiling.  */
+extern void monstartup (u_long, u_long);
+extern void _mcleanup (void);
+
+/* This function gets called at startup by the normal constructor
+   mechanism.  We link this file together with start.o to produce gcrt1.o,
+   so this constructor will be first in the list.  */
+static void gmon_start (void) __attribute__ ((constructor));
+static void
+gmon_start (void)
+{
+  /* Start keeping profiling records.  */
+  monstartup ((u_long) &_start, (u_long) &etext);
+
+  /* Call _mcleanup before exitting; it will write out gmon.out from the
+     collected data.  */
+  atexit (&_mcleanup);
+}
+