1 /* Test backtrace and backtrace_symbols: common code for examining
2 backtraces.
3 Copyright (C) 2013-2022 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20 #include <stdbool.h>
21 #include <stdio.h>
22 #include <string.h>
23
24 /* Set to a non-zero value if the test fails. */
25 volatile int ret;
26
27 /* Accesses to X are used to prevent optimization. */
28 volatile int x;
29
30 /* Called if the test fails. */
31 #define FAIL() \
32 do { printf ("Failure on line %d\n", __LINE__); ret = 1; } while (0)
33
34 /* Use this attribute to prevent inlining, so that all expected frames
35 are present. */
36 #define NO_INLINE __attribute__ ((noinline, noclone, weak))
37
38 /* Look for a match in SYM from backtrace_symbols to NAME, a fragment
39 of a function name. Ignore the filename before '(', but presume
40 that the function names are chosen so they cannot accidentally
41 match the hex offset before the closing ')'. */
42
43 static inline bool
match(const char * sym,const char * name)44 match (const char *sym, const char *name)
45 {
46 char *p = strchr (sym, '(');
47 return p != NULL && strstr (p, name) != NULL;
48 }
49