1 /* Support to debug branch prediction.
2 Copyright (C) 2007 Red Hat, Inc.
3 This file is part of elfutils.
4 Written by Ulrich Drepper <drepper@redhat.com>, 2007.
5
6 This file is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 elfutils is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18
19 #include <stdio.h>
20
21 #if DEBUGPRED
22 extern const unsigned long int __start_predict_data;
23 extern const unsigned long int __stop_predict_data;
24 extern const unsigned long int __start_predict_line;
25 extern const char *const __start_predict_file;
26
27 static void
28 __attribute__ ((destructor))
predprint(void)29 predprint (void)
30 {
31 const unsigned long int *s = &__start_predict_data;
32 const unsigned long int *e = &__stop_predict_data;
33 const unsigned long int *sl = &__start_predict_line;
34 const char *const *sf = &__start_predict_file;
35 while (s < e)
36 {
37 if (s[0] != 0 || s[1] != 0)
38 printf ("%s:%lu: wrong=%lu, correct=%lu%s\n", *sf, *sl, s[0], s[1],
39 s[0] > s[1] ? " <==== WARNING" : "");
40 ++sl;
41 ++sf;
42 s += 2;
43 }
44 }
45 #endif
46