1 | /* Test backtrace and backtrace_symbols. |
2 | Copyright (C) 2009-2022 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 | #include <execinfo.h> |
20 | #include <search.h> |
21 | #include <stdio.h> |
22 | #include <stdlib.h> |
23 | #include <string.h> |
24 | |
25 | #include "tst-backtrace.h" |
26 | |
27 | /* The backtrace should include at least f1, f2, f3, and do_test. */ |
28 | #define NUM_FUNCTIONS 4 |
29 | |
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 (array: addresses, size: sizeof (addresses) / sizeof (addresses[0])); |
40 | printf (format: "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 (array: addresses, size: 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 (format: "Function %d: %s\n" , i, symbols[i]); |
57 | /* Check that the function names obtained are accurate. */ |
58 | if (!match (sym: symbols[0], name: "fn1" )) |
59 | { |
60 | FAIL (); |
61 | return; |
62 | } |
63 | /* Symbol names are not available for static functions, so we do not |
64 | check f2. */ |
65 | if (!match (sym: symbols[2], name: "fn3" )) |
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 | |
74 | NO_INLINE int |
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 | |
90 | NO_INLINE int |
91 | do_test (void) |
92 | { |
93 | /* Test BZ #18084. */ |
94 | void *buffer[1]; |
95 | |
96 | if (backtrace (array: buffer, size: 0) != 0) |
97 | FAIL (); |
98 | |
99 | fn3 (); |
100 | return ret; |
101 | } |
102 | |
103 | #include <support/test-driver.c> |
104 | |