5045b3d789
This commit adds two new commands which may be used to test thread
debugging libraries used by GDB:
* "maint check libthread-db" tests the thread debugging library GDB
is using for the current inferior.
* "maint set/show check-libthread-db" selects whether libthread_db
tests should be run automatically as libthread_db is auto-loaded.
The default is to not run tests automatically.
The test itself is a basic integrity check exercising all libthread_db
functions used by GDB on GNU/Linux systems. By extension this also
exercises the proc_service functions provided by GDB that libthread_db
uses.
This functionality is useful for NPTL developers and libthread_db
developers. It could also prove useful investigating bugs reported
against GDB where the thread debugging library or GDB's proc_service
layer is suspect.
gdb/ChangeLog:
* linux-thread-db.c (valprint.h): New include.
(struct check_thread_db_info): New structure.
(check_thread_db_on_load, tdb_testinfo): New static globals.
(check_thread_db, check_thread_db_callback): New functions.
(try_thread_db_load_1): Run integrity checks if requested.
(maintenance_check_libthread_db): New function.
(_initialize_thread_db): Register "maint check libthread-db"
and "maint set/show check-libthread-db".
* NEWS: Mention the above new commands.
gdb/doc/ChangeLog:
* gdb.texinfo (Maintenance Commands): Document "maint check
libthread-db" and "maint set/show check-libthread-db".
gdb/testsuite/ChangeLog:
* gdb.threads/check-libthread-db.exp: New file.
* gdb.threads/check-libthread-db.c: Likewise.
68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2017-2018 Free Software Foundation, Inc.
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <errno.h>
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static void
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break_here (void)
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{
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}
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static void *
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thread_routine (void *arg)
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{
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errno = 42;
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break_here ();
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while (1)
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sleep (1);
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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_t the_thread;
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int err;
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err = pthread_create (&the_thread, NULL, thread_routine, NULL);
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if (err != 0)
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{
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fprintf (stderr, "pthread_create: %s (%d)\n", strerror (err), err);
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exit (EXIT_FAILURE);
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}
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errno = 23;
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err = pthread_join (the_thread, NULL);
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if (err != 0)
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{
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fprintf (stderr, "pthread_join: %s (%d)\n", strerror (err), err);
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exit (EXIT_FAILURE);
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}
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exit (EXIT_SUCCESS);
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}
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