152 lines
4.0 KiB
C
152 lines
4.0 KiB
C
/* Test with many dynamic TLS variables.
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Copyright (C) 2016-2022 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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/* This test intends to exercise dynamic TLS variable allocation. It
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achieves this by combining dlopen (to avoid static TLS allocation
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after static TLS resizing), many DSOs with a large variable (to
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exceed the static TLS reserve), and an already-running thread (to
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force full dynamic TLS initialization). */
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#include "tst-tls-manydynamic.h"
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#include <errno.h>
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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 <string.h>
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static int do_test (void);
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#include <support/xthread.h>
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#include <support/test-driver.c>
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void *handles[COUNT];
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set_value_func set_value_funcs[COUNT];
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get_value_func get_value_funcs[COUNT];
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static void
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init_functions (void)
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{
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for (int i = 0; i < COUNT; ++i)
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{
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/* Open the module. */
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{
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char soname[100];
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snprintf (soname, sizeof (soname), "tst-tls-manydynamic%02dmod.so", i);
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handles[i] = dlopen (soname, RTLD_LAZY);
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if (handles[i] == NULL)
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{
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printf ("error: dlopen failed: %s\n", dlerror ());
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exit (1);
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}
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}
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/* Obtain the setter function. */
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{
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char fname[100];
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snprintf (fname, sizeof (fname), "set_value_%02d", i);
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void *func = dlsym (handles[i], fname);
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if (func == NULL)
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{
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printf ("error: dlsym: %s\n", dlerror ());
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exit (1);
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}
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set_value_funcs[i] = func;
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}
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/* Obtain the getter function. */
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{
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char fname[100];
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snprintf (fname, sizeof (fname), "get_value_%02d", i);
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void *func = dlsym (handles[i], fname);
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if (func == NULL)
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{
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printf ("error: dlsym: %s\n", dlerror ());
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exit (1);
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}
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get_value_funcs[i] = func;
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}
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}
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}
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static pthread_barrier_t barrier;
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/* Running thread which forces real TLS initialization. */
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static void *
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blocked_thread_func (void *closure)
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{
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xpthread_barrier_wait (&barrier);
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/* TLS test runs here in the main thread. */
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xpthread_barrier_wait (&barrier);
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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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{
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int ret = pthread_barrier_init (&barrier, NULL, 2);
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if (ret != 0)
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{
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errno = ret;
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printf ("error: pthread_barrier_init: %m\n");
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exit (1);
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}
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}
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pthread_t blocked_thread = xpthread_create (NULL, blocked_thread_func, NULL);
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xpthread_barrier_wait (&barrier);
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init_functions ();
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struct value values[COUNT];
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/* Initialze the TLS variables. */
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for (int i = 0; i < COUNT; ++i)
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{
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for (int j = 0; j < PER_VALUE_COUNT; ++j)
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values[i].num[j] = rand ();
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set_value_funcs[i] (&values[i]);
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}
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/* Read back their values to check that they do not overlap. */
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for (int i = 0; i < COUNT; ++i)
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{
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struct value actual;
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get_value_funcs[i] (&actual);
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for (int j = 0; j < PER_VALUE_COUNT; ++j)
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if (actual.num[j] != values[i].num[j])
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{
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printf ("error: mismatch at variable %d/%d: %d != %d\n",
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i, j, actual.num[j], values[i].num[j]);
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exit (1);
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}
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}
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xpthread_barrier_wait (&barrier);
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xpthread_join (blocked_thread);
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/* Close the modules. */
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for (int i = 0; i < COUNT; ++i)
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dlclose (handles[i]);
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return 0;
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}
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