1 | /* Test backtrace and backtrace_symbols for recursive calls. |
2 | Copyright (C) 2010-2022 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 3 * fn, and do_test. */ |
28 | #define NUM_FUNCTIONS 4 |
29 | |
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: c - 1); |
41 | return x; |
42 | } |
43 | /* Get the backtrace addresses. */ |
44 | n = backtrace (array: addresses, size: sizeof (addresses) / sizeof (addresses[0])); |
45 | printf (format: "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 (array: addresses, size: 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 (format: "Function %d: %s\n" , i, symbols[i]); |
62 | /* Check that the function names obtained are accurate. */ |
63 | for (i = 0; i < n - 1; ++i) |
64 | if (!match (sym: symbols[i], name: "fn" )) |
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 | |
74 | NO_INLINE int |
75 | do_test (void) |
76 | { |
77 | fn (c: 2); |
78 | return ret; |
79 | } |
80 | |
81 | #include <support/test-driver.c> |
82 | |