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authorRoland McGrath <roland@gnu.org>1995-09-26 20:59:38 +0000
committerRoland McGrath <roland@gnu.org>1995-09-26 20:59:38 +0000
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Tue Sep 26 16:50:17 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* gmon: New directory of profiling code, incorporated from 4.4BSD-Lite and modified. * sysdeps/i386/machine-gmon.h: New file. * sysdeps/stub/machine-gmon.h: New file. * sysdeps/mach/hurd/profil.c: New file. * sysdeps/stub/profil.c: New file. * sysdeps/unix/bsd/profil.S: New file. * Makefile (subdirs): Add gmon. * csu/gmon-start.c: New file. * csu/Makefile (extra-objs): Add gmon-start.o, g$(start-installed-name). (install-lib, omit-deps): Add g$(start-installed-name). ($(objpfx)g$(start-installed-name)): New target.
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+/* 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);
+}
+