5876f5032f
I have posted: TLS variables access for -static -lpthread executables https://sourceware.org/ml/libc-help/2014-03/msg00024.html and the GDB patch below has been confirmed as OK for current glibcs. Further work should be done for newer glibcs: Improve TLS variables glibc compatibility https://sourceware.org/bugzilla/show_bug.cgi?id=16954 Still the patch below implements the feature in a fully functional way backward compatible with current glibcs, it depends on the following glibc source line: csu/libc-tls.c main_map->l_tls_modid = 1; gdb/ 2014-05-21 Jan Kratochvil <jan.kratochvil@redhat.com> Fix TLS access for -static -pthread. * linux-thread-db.c (struct thread_db_info): Add td_thr_tlsbase_p. (try_thread_db_load_1): Initialize it. (thread_db_get_thread_local_address): Call it if LM is zero. * target.c (target_translate_tls_address): Remove LM_ADDR zero check. * target.h (struct target_ops) (to_get_thread_local_address): Add load_module_addr comment. gdb/gdbserver/ 2014-05-21 Jan Kratochvil <jan.kratochvil@redhat.com> Fix TLS access for -static -pthread. * gdbserver/thread-db.c (struct thread_db): Add td_thr_tlsbase_p. (thread_db_get_tls_address): Call it if LOAD_MODULE is zero. (thread_db_load_search, try_thread_db_load_1): Initialize it. gdb/testsuite/ 2014-05-21 Jan Kratochvil <jan.kratochvil@redhat.com> Fix TLS access for -static -pthread. * gdb.threads/staticthreads.c <HAVE_TLS> (tlsvar): New. <HAVE_TLS> (thread_function, main): Initialize it. * gdb.threads/staticthreads.exp: Try gdb_compile_pthreads for $have_tls. Add clean_restart. <$have_tls != "">: Check TLSVAR. Message-ID: <20140410115204.GB16411@host2.jankratochvil.net>
81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
/* This test program is part of GDB, The GNU debugger.
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Copyright 2004-2014 Free Software Foundation, Inc.
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Originally written by Jeff Johnston <jjohnstn@redhat.com>,
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contributed by Red Hat
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <semaphore.h>
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#include <stdio.h>
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#include <limits.h>
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#include <errno.h>
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sem_t semaphore;
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#ifdef HAVE_TLS
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__thread int tlsvar;
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#endif
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void *
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thread_function (void *arg)
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{
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#ifdef HAVE_TLS
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tlsvar = 2;
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#endif
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printf ("Thread executing\n"); /* tlsvar-is-set */
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while (sem_wait (&semaphore) != 0)
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{
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if (errno != EINTR)
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{
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perror ("thread_function");
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return NULL;
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}
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}
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return NULL;
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}
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int
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main (int argc, char **argv)
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{
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pthread_attr_t attr;
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pthread_attr_init (&attr);
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pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN);
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if (sem_init (&semaphore, 0, 0) == -1)
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{
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perror ("semaphore");
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return -1;
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}
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#ifdef HAVE_TLS
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tlsvar = 1;
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#endif
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/* Create a thread, wait for it to complete. */
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{
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pthread_t thread;
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pthread_create (&thread, &attr, thread_function, NULL);
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sem_post (&semaphore);
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pthread_join (thread, NULL);
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}
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pthread_attr_destroy (&attr);
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return 0;
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}
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