| 1 | /* Check that strerror, strerror_l do not return NULL on failure (bug 30555). |
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| 2 | Copyright (C) 2023-2024 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 | |
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| 20 | #include <locale.h> |
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| 21 | #include <stdbool.h> |
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| 22 | #include <stdlib.h> |
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| 23 | #include <string.h> |
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| 24 | #include <support/check.h> |
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| 25 | #include <support/namespace.h> |
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| 26 | #include <support/xdlfcn.h> |
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| 27 | |
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| 28 | /* Interposed malloc that can be used to inject allocation failures. */ |
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| 29 | |
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| 30 | static volatile bool fail_malloc; |
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| 31 | |
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| 32 | void * |
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| 33 | malloc (size_t size) |
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| 34 | { |
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| 35 | if (fail_malloc) |
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| 36 | return NULL; |
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| 37 | |
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| 38 | static void *(*original_malloc) (size_t); |
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| 39 | if (original_malloc == NULL) |
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| 40 | original_malloc = xdlsym (RTLD_NEXT, symbol: "malloc" ); |
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| 41 | return original_malloc (size); |
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| 42 | } |
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| 43 | |
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| 44 | /* Callbacks for the actual tests. Use fork to run both tests with a |
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| 45 | clean state. */ |
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| 46 | |
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| 47 | static void |
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| 48 | test_strerror (void *closure) |
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| 49 | { |
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| 50 | fail_malloc = true; |
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| 51 | const char *s = strerror (errnum: 999); |
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| 52 | fail_malloc = false; |
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| 53 | TEST_COMPARE_STRING (s, "Unknown error" ); |
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| 54 | } |
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| 55 | |
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| 56 | static void |
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| 57 | test_strerror_l (void *closure) |
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| 58 | { |
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| 59 | locale_t loc = newlocale (LC_ALL, locale: "C" , base: (locale_t) 0); |
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| 60 | TEST_VERIFY (loc != (locale_t) 0); |
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| 61 | fail_malloc = true; |
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| 62 | const char *s = strerror_l (errnum: 999, l: loc); |
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| 63 | fail_malloc = false; |
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| 64 | TEST_COMPARE_STRING (s, "Unknown error" ); |
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| 65 | freelocale (dataset: loc); |
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| 66 | } |
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| 67 | |
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| 68 | static int |
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| 69 | do_test (void) |
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| 70 | { |
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| 71 | support_isolate_in_subprocess (callback: test_strerror, NULL); |
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| 72 | support_isolate_in_subprocess (callback: test_strerror_l, NULL); |
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| 73 | |
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| 74 | return 0; |
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| 75 | } |
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| 76 | |
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| 77 | #include <support/test-driver.c> |
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| 78 | |
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