mirror of git://sourceware.org/git/glibc.git
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* Test getenv with concurrent unsetenv.
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Copyright (C) 2024-2025 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 <array_length.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/xthread.h>
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/* Used to synchronize the start of each test iteration. */
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static pthread_barrier_t barrier;
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/* Number of iterations. */
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enum { iterations = 10000 };
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/* Check that even with concurrent unsetenv, a variable that is known
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to be there is found. */
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static void *
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getenv_thread (void *ignored)
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{
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for (int i = 0; i < iterations; ++i)
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{
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xpthread_barrier_wait (&barrier);
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TEST_COMPARE_STRING (getenv ("variable"), "value");
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xpthread_barrier_wait (&barrier);
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}
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return NULL;
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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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xpthread_barrier_init (&barrier, NULL, 2);
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pthread_t thr = xpthread_create (NULL, getenv_thread, NULL);
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char *variables[50];
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for (int i = 0; i < array_length (variables); ++i)
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variables[i] = xasprintf ("V%d", i);
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for (int i = 0; i < iterations; ++i)
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{
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clearenv ();
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for (int j = 0; j < array_length (variables); ++j)
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TEST_COMPARE (setenv (variables[j], variables[j] + 1, 1), 0);
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TEST_COMPARE (setenv ("variable", "value", 1), 0);
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xpthread_barrier_wait (&barrier);
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/* Test runs. */
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for (int j = 0; j < array_length (variables); ++j)
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TEST_COMPARE (unsetenv (variables[j]), 0);
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xpthread_barrier_wait (&barrier);
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}
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xpthread_join (thr);
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xpthread_barrier_destroy (&barrier);
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for (int i = 0; i < array_length (variables); ++i)
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free (variables[i]);
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return 0;
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}
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#include <support/test-driver.c>
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