tools/reorder/cygprof.c

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   3  *
   4  * The contents of this file are subject to the Mozilla Public License Version
   5  * 1.1 (the "License"); you may not use this file except in compliance with
   6  * the License. You may obtain a copy of the License at
   7  * http://www.mozilla.org/MPL/
   8  *
   9  * Software distributed under the License is distributed on an "AS IS" basis,
  10  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  11  * for the specific language governing rights and limitations under the
  12  * License.
  13  *
  14  * The Original Code is ``libcygprof.so''
  15  *
  16  * The Initial Developer of the Original Code is Netscape
  17  * Communications Corp.  Portions created by the Initial Developer are
  18  * Copyright (C) 2001 the Initial Developer. All Rights Reserved.
  19  *
  20  * Contributor(s):
  21  *   Chris Waterson <waterson@netscape.com>
  22  *
  23  * Alternatively, the contents of this file may be used under the terms of
  24  * either the GNU General Public License Version 2 or later (the "GPL"), or
  25  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  26  * in which case the provisions of the GPL or the LGPL are applicable instead
  27  * of those above. If you wish to allow use of your version of this file only
  28  * under the terms of either the GPL or the LGPL, and not to allow others to
  29  * use your version of this file under the terms of the MPL, indicate your
  30  * decision by deleting the provisions above and replace them with the notice
  31  * and other provisions required by the GPL or the LGPL. If you do not delete
  32  * the provisions above, a recipient may use your version of this file under
  33  * the terms of any one of the MPL, the GPL or the LGPL.
  34  *
  35  * ***** END LICENSE BLOCK ***** */
  36
  37 /*
  38
  39   A stub library to LD_PRELOAD against an image that's been compiled
  40   with -finstrument-functions. It dumps the address of the function
  41   that's being entered upon function entry, and the address that's
  42   being returned to on function exit. Addresses are dumped as binary
  43   data to stdout.
  44
  45  */
  46
  47 #include <unistd.h>
  48
  49 void
  50 __cyg_profile_func_enter(void *this_fn, void *call_site)
  51 {
  52     write(STDOUT_FILENO, &this_fn, sizeof this_fn);
  53 }
  54
  55 void
  56 __cyg_profile_func_exit(void *this_fn, void *call_site)
  57 {
  58     write(STDOUT_FILENO, &call_site, sizeof call_site);
  59 }