| 1 | /* Test backtrace and backtrace_symbols. |
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| 2 | Copyright (C) 2009-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <execinfo.h> |
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| 20 | #include <search.h> |
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| 21 | #include <stdio.h> |
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| 22 | #include <stdlib.h> |
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| 23 | #include <string.h> |
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| 24 | |
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| 25 | #include "tst-backtrace.h" |
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| 26 | |
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| 27 | /* The backtrace should include at least f1, f2, f3, and do_test. */ |
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| 28 | #define NUM_FUNCTIONS 4 |
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| 29 | |
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| 30 | NO_INLINE void |
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| 31 | fn1 (void) |
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| 32 | { |
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| 33 | void *addresses[NUM_FUNCTIONS]; |
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| 34 | char **symbols; |
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| 35 | int n; |
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| 36 | int i; |
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| 37 | |
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| 38 | /* Get the backtrace addresses. */ |
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| 39 | n = backtrace (array: addresses, size: sizeof (addresses) / sizeof (addresses[0])); |
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| 40 | printf (format: "Obtained backtrace with %d functions\n" , n); |
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| 41 | /* Check that there are at least four functions. */ |
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| 42 | if (n < NUM_FUNCTIONS) |
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| 43 | { |
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| 44 | FAIL (); |
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| 45 | return; |
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| 46 | } |
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| 47 | /* Convert them to symbols. */ |
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| 48 | symbols = backtrace_symbols (array: addresses, size: n); |
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| 49 | /* Check that symbols were obtained. */ |
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| 50 | if (symbols == NULL) |
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| 51 | { |
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| 52 | FAIL (); |
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| 53 | return; |
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| 54 | } |
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| 55 | for (i = 0; i < n; ++i) |
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| 56 | printf (format: "Function %d: %s\n" , i, symbols[i]); |
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| 57 | /* Check that the function names obtained are accurate. */ |
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| 58 | if (!match (sym: symbols[0], name: "fn1" )) |
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| 59 | { |
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| 60 | FAIL (); |
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| 61 | return; |
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| 62 | } |
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| 63 | /* Symbol names are not available for static functions, so we do not |
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| 64 | check f2. */ |
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| 65 | if (!match (sym: symbols[2], name: "fn3" )) |
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| 66 | { |
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| 67 | FAIL (); |
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| 68 | return; |
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| 69 | } |
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| 70 | /* Symbol names are not available for static functions, so we do not |
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| 71 | check do_test. */ |
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| 72 | } |
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| 73 | |
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| 74 | NO_INLINE int |
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| 75 | fn2 (void) |
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| 76 | { |
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| 77 | fn1 (); |
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| 78 | /* Prevent tail calls. */ |
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| 79 | return x; |
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| 80 | } |
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| 81 | |
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| 82 | NO_INLINE int |
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| 83 | fn3 (void) |
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| 84 | { |
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| 85 | fn2(); |
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| 86 | /* Prevent tail calls. */ |
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| 87 | return x; |
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| 88 | } |
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| 89 | |
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| 90 | NO_INLINE int |
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| 91 | do_test (void) |
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| 92 | { |
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| 93 | /* Test BZ #18084. */ |
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| 94 | void *buffer[1]; |
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| 95 | |
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| 96 | if (backtrace (array: buffer, size: 0) != 0) |
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| 97 | FAIL (); |
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| 98 | |
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| 99 | fn3 (); |
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| 100 | return ret; |
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| 101 | } |
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| 102 | |
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| 103 | #include <support/test-driver.c> |
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| 104 | |
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