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31d470ac | 1 | /* Test backtrace and backtrace_symbols. |
04277e02 | 2 | Copyright (C) 2009-2019 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 f1, f2, f3, and do_test. */ |
28 | #define NUM_FUNCTIONS 4 | |
29 | ||
31d470ac JM |
30 | NO_INLINE void |
31 | fn1 (void) | |
32 | { | |
33 | void *addresses[NUM_FUNCTIONS]; | |
34 | char **symbols; | |
35 | int n; | |
36 | int i; | |
37 | ||
38 | /* Get the backtrace addresses. */ | |
39 | n = backtrace (addresses, sizeof (addresses) / sizeof (addresses[0])); | |
40 | printf ("Obtained backtrace with %d functions\n", n); | |
41 | /* Check that there are at least four functions. */ | |
42 | if (n < NUM_FUNCTIONS) | |
43 | { | |
44 | FAIL (); | |
45 | return; | |
46 | } | |
47 | /* Convert them to symbols. */ | |
48 | symbols = backtrace_symbols (addresses, n); | |
49 | /* Check that symbols were obtained. */ | |
50 | if (symbols == NULL) | |
51 | { | |
52 | FAIL (); | |
53 | return; | |
54 | } | |
55 | for (i = 0; i < n; ++i) | |
56 | printf ("Function %d: %s\n", i, symbols[i]); | |
57 | /* Check that the function names obtained are accurate. */ | |
8c53a12c | 58 | if (!match (symbols[0], "fn1")) |
31d470ac JM |
59 | { |
60 | FAIL (); | |
61 | return; | |
62 | } | |
63 | /* Symbol names are not available for static functions, so we do not | |
64 | check f2. */ | |
8c53a12c | 65 | if (!match (symbols[2], "fn3")) |
31d470ac JM |
66 | { |
67 | FAIL (); | |
68 | return; | |
69 | } | |
70 | /* Symbol names are not available for static functions, so we do not | |
71 | check do_test. */ | |
72 | } | |
73 | ||
341657bc | 74 | NO_INLINE int |
31d470ac JM |
75 | fn2 (void) |
76 | { | |
77 | fn1 (); | |
78 | /* Prevent tail calls. */ | |
79 | return x; | |
80 | } | |
81 | ||
82 | NO_INLINE int | |
83 | fn3 (void) | |
84 | { | |
85 | fn2(); | |
86 | /* Prevent tail calls. */ | |
87 | return x; | |
88 | } | |
89 | ||
341657bc | 90 | NO_INLINE int |
31d470ac JM |
91 | do_test (void) |
92 | { | |
d5dff793 PP |
93 | /* Test BZ #18084. */ |
94 | void *buffer[1]; | |
95 | ||
96 | if (backtrace (buffer, 0) != 0) | |
97 | FAIL (); | |
98 | ||
31d470ac JM |
99 | fn3 (); |
100 | return ret; | |
101 | } | |
341657bc FW |
102 | |
103 | #include <support/test-driver.c> |