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31d470ac | 1 | /* Test backtrace and backtrace_symbols for recursive calls. |
dff8da6b | 2 | Copyright (C) 2010-2024 Free Software Foundation, Inc. |
31d470ac JM |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
31d470ac JM |
18 | |
19 | #include <execinfo.h> | |
20 | #include <search.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | ||
8c53a12c JM |
25 | #include "tst-backtrace.h" |
26 | ||
31d470ac JM |
27 | /* The backtrace should include at least 3 * fn, and do_test. */ |
28 | #define NUM_FUNCTIONS 4 | |
29 | ||
31d470ac JM |
30 | NO_INLINE int |
31 | fn (int c) | |
32 | { | |
33 | void *addresses[NUM_FUNCTIONS]; | |
34 | char **symbols; | |
35 | int n; | |
36 | int i; | |
37 | ||
38 | if (c > 0) | |
39 | { | |
40 | fn (c - 1); | |
41 | return x; | |
42 | } | |
43 | /* Get the backtrace addresses. */ | |
44 | n = backtrace (addresses, sizeof (addresses) / sizeof (addresses[0])); | |
45 | printf ("Obtained backtrace with %d functions\n", n); | |
46 | /* Check that there are at least four functions. */ | |
47 | if (n < NUM_FUNCTIONS) | |
48 | { | |
49 | FAIL (); | |
50 | return 1; | |
51 | } | |
52 | /* Convert them to symbols. */ | |
53 | symbols = backtrace_symbols (addresses, n); | |
54 | /* Check that symbols were obtained. */ | |
55 | if (symbols == NULL) | |
56 | { | |
57 | FAIL (); | |
58 | return 1; | |
59 | } | |
60 | for (i = 0; i < n; ++i) | |
61 | printf ("Function %d: %s\n", i, symbols[i]); | |
62 | /* Check that the function names obtained are accurate. */ | |
63 | for (i = 0; i < n - 1; ++i) | |
8c53a12c | 64 | if (!match (symbols[i], "fn")) |
31d470ac JM |
65 | { |
66 | FAIL (); | |
67 | return 1; | |
68 | } | |
69 | /* Symbol names are not available for static functions, so we do not | |
70 | check do_test. */ | |
71 | return x; | |
72 | } | |
73 | ||
341657bc | 74 | NO_INLINE int |
31d470ac JM |
75 | do_test (void) |
76 | { | |
77 | fn (2); | |
78 | return ret; | |
79 | } | |
341657bc FW |
80 | |
81 | #include <support/test-driver.c> |