ea4758f2dd
I realized that the name of this test only made sense when considering the old (never committed) implementation of the fix that came along with the test originally, that forced a schedlock while a step-resume (to get over the signal handler) was inserted. The final solution that went into the tree does not force that locking. So this renames it to something more descriptive. gdb/testsuite/ 2014-02-21 Pedro Alves <palves@redhat.com> * gdb.threads/step-after-sr-lock.c: Rename to ... * gdb.threads/signal-while-stepping-over-bp-other-thread.c: ... this. * gdb.threads/step-after-sr-lock.exp: Rename to ... * gdb.threads/signal-while-stepping-over-bp-other-thread.exp: ... this.
145 lines
3 KiB
C
145 lines
3 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2009-2014 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 <pthread.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <signal.h>
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unsigned int args[2];
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pid_t pid;
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pthread_barrier_t barrier;
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pthread_t child_thread_2, child_thread_3;
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void
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handler (int signo)
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{
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/* so that thread 3 is sure to run, in case the bug is present. */
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usleep (10);
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}
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void
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callme (void)
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{
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}
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void
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block_signals (void)
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{
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sigset_t mask;
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sigfillset (&mask);
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sigprocmask (SIG_BLOCK, &mask, NULL);
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}
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void
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unblock_signals (void)
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{
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sigset_t mask;
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sigfillset (&mask);
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sigprocmask (SIG_UNBLOCK, &mask, NULL);
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}
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void *
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child_function_3 (void *arg)
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{
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int my_number = (long) arg;
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volatile int *myp = (int *) &args[my_number];
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pthread_barrier_wait (&barrier);
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while (*myp > 0)
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{
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(*myp) ++; /* set breakpoint child_two here */
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callme ();
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}
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pthread_exit (NULL);
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}
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void *
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child_function_2 (void *arg)
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{
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int my_number = (long) arg;
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volatile int *myp = (int *) &args[my_number];
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unblock_signals ();
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pthread_barrier_wait (&barrier);
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while (*myp > 0)
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{
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(*myp) ++;
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callme (); /* set breakpoint child_one here */
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}
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*myp = 1;
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while (*myp > 0)
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{
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(*myp) ++;
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callme ();
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}
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pthread_exit (NULL);
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}
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int
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main ()
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{
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int res;
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long i;
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/* Block signals in all threads but one, so that we're sure which
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thread gets the signal we send from the command line. */
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block_signals ();
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signal (SIGUSR1, handler);
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/* Call these early so that PLTs for these are resolved soon,
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instead of in the threads. RTLD_NOW should work as well. */
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usleep (0);
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pthread_barrier_init (&barrier, NULL, 1);
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pthread_barrier_wait (&barrier);
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pthread_barrier_init (&barrier, NULL, 2);
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/* The test uses this global to know where to send the signal
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to. */
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pid = getpid ();
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i = 0;
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args[i] = 1;
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res = pthread_create (&child_thread_2,
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NULL, child_function_2, (void *) i);
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pthread_barrier_wait (&barrier);
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callme (); /* set wait-thread-2 breakpoint here */
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i = 1;
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args[i] = 1;
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res = pthread_create (&child_thread_3,
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NULL, child_function_3, (void *) i);
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pthread_barrier_wait (&barrier);
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callme (); /* set wait-thread-3 breakpoint here */
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pthread_join (child_thread_2, NULL);
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pthread_join (child_thread_3, NULL);
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exit(EXIT_SUCCESS);
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}
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