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/* Check that strerror, strerror_l do not return NULL on failure (bug 30555).
Copyright (C) 2023-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <locale.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#include <support/namespace.h>
#include <support/xdlfcn.h>
/* Interposed malloc that can be used to inject allocation failures. */
static volatile bool fail_malloc;
void *
malloc (size_t size)
{
if (fail_malloc)
return NULL;
static void *(*original_malloc) (size_t);
if (original_malloc == NULL)
original_malloc = xdlsym (RTLD_NEXT, "malloc");
return original_malloc (size);
}
/* Callbacks for the actual tests. Use fork to run both tests with a
clean state. */
static void
test_strerror (void *closure)
{
fail_malloc = true;
const char *s = strerror (999);
fail_malloc = false;
TEST_COMPARE_STRING (s, "Unknown error");
}
static void
test_strerror_l (void *closure)
{
locale_t loc = newlocale (LC_ALL, "C", (locale_t) 0);
TEST_VERIFY (loc != (locale_t) 0);
fail_malloc = true;
const char *s = strerror_l (999, loc);
fail_malloc = false;
TEST_COMPARE_STRING (s, "Unknown error");
freelocale (loc);
}
static int
do_test (void)
{
support_isolate_in_subprocess (test_strerror, NULL);
support_isolate_in_subprocess (test_strerror_l, NULL);
return 0;
}
#include <support/test-driver.c>
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