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100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/* Test dtv setup if entries don't have monotone increasing generation.
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Copyright (C) 2021 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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<http://www.gnu.org/licenses/>. */
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#include <dlfcn.h>
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#include <pthread.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/xdlfcn.h>
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#include <support/xthread.h>
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#define NMOD 100
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static void *mod[NMOD];
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static void
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load_fail (void)
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{
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/* Expected to fail because of a missing symbol. */
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void *m = dlopen ("tst-tls20mod-bad.so", RTLD_NOW);
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if (m != NULL)
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FAIL_EXIT1 ("dlopen of tst-tls20mod-bad.so succeeded\n");
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}
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static void
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load_mod (int i)
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{
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char *buf = xasprintf ("tst-tls-manydynamic%02dmod.so", i);
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mod[i] = xdlopen (buf, RTLD_LAZY);
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free (buf);
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}
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static void
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unload_mod (int i)
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{
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if (mod[i] != NULL)
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xdlclose (mod[i]);
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mod[i] = NULL;
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}
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static void
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access (int i)
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{
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char *buf = xasprintf ("tls_global_%02d", i);
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dlerror ();
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int *p = dlsym (mod[i], buf);
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printf ("mod[%d]: &tls = %p\n", i, p);
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if (p == NULL)
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FAIL_EXIT1 ("dlsym failed: %s\n", dlerror ());
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++*p;
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free (buf);
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}
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static void *
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start (void *a)
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{
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for (int i = 0; i < NMOD; i++)
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if (mod[i] != NULL)
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access (i);
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return 0;
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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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int i;
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for (i = 0; i < NMOD; i++)
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{
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load_mod (i);
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/* Bump the generation of mod[0] without using new dtv slot. */
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unload_mod (0);
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load_fail (); /* Ensure GL(dl_tls_dtv_gaps) is true: see bug 27135. */
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load_mod (0);
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/* Access TLS in all loaded modules. */
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pthread_t t = xpthread_create (0, start, 0);
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xpthread_join (t);
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}
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for (i = 0; i < NMOD; i++)
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unload_mod (i);
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return 0;
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}
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#include <support/test-driver.c>
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