1/* Test program for profiling information collection (_mcount/gprof).
2 Copyright (C) 2017-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19/* This program does not use the test harness because we want tight
20 control over the call graph. */
21
22__attribute__ ((noinline, noclone, weak)) void
23f1 (void)
24{
25}
26
27__attribute__ ((noinline, noclone, weak)) void
28f2 (void)
29{
30 f1 ();
31 /* Prevent tail call. */
32 asm volatile ("");
33}
34
35__attribute__ ((noinline, noclone, weak)) void
36f3 (int count)
37{
38 for (int i = 0; i < count; ++i)
39 {
40 f1 ();
41 f2 ();
42 }
43}
44
45int
46main (void)
47{
48 f3 (count: 1000);
49 return 0;
50}
51

source code of glibc/gmon/tst-gmon.c