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80 lines
2.9 KiB
C
80 lines
2.9 KiB
C
/* Test dlopen rollback after failures involving NODELETE objects (bug 20839).
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Copyright (C) 2019-2020 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 <dlfcn.h>
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#include <errno.h>
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#include <gnu/lib-names.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include <support/check.h>
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#include <support/xdlfcn.h>
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static int
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do_test (void)
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{
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/* This test uses libpthread as the canonical NODELETE module. If
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libpthread is no longer NODELETE because it has been merged into
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libc, the test needs to be updated. */
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TEST_VERIFY (dlsym (NULL, "pthread_create") == NULL);
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/* This is expected to fail because of the missing dependency. */
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puts ("info: attempting to load tst-dlopenfailmod1.so");
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TEST_VERIFY (dlopen ("tst-dlopenfailmod1.so", RTLD_LAZY) == NULL);
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const char *message = dlerror ();
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TEST_COMPARE_STRING (message,
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"tst-dlopenfail-missingmod.so:"
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" cannot open shared object file:"
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" No such file or directory");
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/* Do not probe for the presence of libpthread at this point because
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that might trigger relocation if bug 20839 is present, obscuring
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a subsequent crash. */
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/* This is expected to succeed. */
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puts ("info: loading tst-dlopenfailmod2.so");
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void *handle = xdlopen ("tst-dlopenfailmod2.so", RTLD_NOW);
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xdlclose (handle);
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/* libpthread should remain loaded. */
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TEST_VERIFY (dlopen (LIBPTHREAD_SO, RTLD_LAZY | RTLD_NOLOAD) != NULL);
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TEST_VERIFY (dlsym (NULL, "pthread_create") == NULL);
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/* We can make libpthread global, and then the symbol should become
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available. */
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TEST_VERIFY (dlopen (LIBPTHREAD_SO, RTLD_LAZY | RTLD_GLOBAL) != NULL);
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TEST_VERIFY (dlsym (NULL, "pthread_create") != NULL);
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/* sem_open is sufficiently complex to depend on relocations. */
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void *(*sem_open_ptr) (const char *, int flag, ...)
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= dlsym (NULL, "sem_open");
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if (sem_open_ptr == NULL)
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/* Hurd does not implement sem_open. */
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puts ("warning: sem_open not found, further testing not possible");
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else
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{
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errno = 0;
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TEST_VERIFY (sem_open_ptr ("/", 0) == NULL);
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TEST_COMPARE (errno, EINVAL);
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}
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return 0;
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}
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#include <support/test-driver.c>
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