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581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/* Test concurrent dlopen and pthread_create: BZ 19329.
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Copyright (C) 2021-2022 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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<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 <stdatomic.h>
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#include <support/xdlfcn.h>
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#include <support/xthread.h>
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#define THREADS 10000
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static atomic_int done;
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static void *
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start (void *a)
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{
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/* Load a module with many dependencies that each have TLS. */
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xdlopen ("tst-tls21mod.so", RTLD_LAZY);
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atomic_store_explicit (&done, 1, memory_order_release);
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return 0;
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}
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static void *
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nop (void *a)
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{
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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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pthread_t t1, t2;
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int i;
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/* Load a module with lots of dependencies and TLS. */
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t1 = xpthread_create (0, start, 0);
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/* Concurrently create lots of threads until dlopen is observably done. */
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for (i = 0; i < THREADS; i++)
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{
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if (atomic_load_explicit (&done, memory_order_acquire) != 0)
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break;
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t2 = xpthread_create (0, nop, 0);
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xpthread_join (t2);
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}
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xpthread_join (t1);
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printf ("threads created during dlopen: %d\n", i);
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return 0;
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}
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#include <support/test-driver.c>
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