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1d44530a5b
For strerror, this fixes commit 28aff04781 ("string:
Implement strerror in terms of strerror_l"). This commit avoids
returning NULL for strerror_l as well, although POSIX allows this
behavior for strerror_l.
Reviewed-by: Arjun Shankar <arjun@redhat.com>
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/* Check that strerror, strerror_l do not return NULL on failure (bug 30555).
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Copyright (C) 2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <locale.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <support/check.h>
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#include <support/namespace.h>
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#include <support/xdlfcn.h>
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/* Interposed malloc that can be used to inject allocation failures. */
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static volatile bool fail_malloc;
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void *
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malloc (size_t size)
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{
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if (fail_malloc)
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return NULL;
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static void *(*original_malloc) (size_t);
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if (original_malloc == NULL)
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original_malloc = xdlsym (RTLD_NEXT, "malloc");
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return original_malloc (size);
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}
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/* Callbacks for the actual tests. Use fork to run both tests with a
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clean state. */
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static void
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test_strerror (void *closure)
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{
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fail_malloc = true;
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const char *s = strerror (999);
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fail_malloc = false;
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TEST_COMPARE_STRING (s, "Unknown error");
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}
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static void
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test_strerror_l (void *closure)
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{
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locale_t loc = newlocale (LC_ALL, "C", (locale_t) 0);
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TEST_VERIFY (loc != (locale_t) 0);
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fail_malloc = true;
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const char *s = strerror_l (999, loc);
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fail_malloc = false;
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TEST_COMPARE_STRING (s, "Unknown error");
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freelocale (loc);
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}
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static int
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do_test (void)
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{
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support_isolate_in_subprocess (test_strerror, NULL);
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support_isolate_in_subprocess (test_strerror_l, NULL);
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return 0;
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}
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#include <support/test-driver.c>
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