173 lines
3.5 KiB
C
173 lines
3.5 KiB
C
/* Test case for forgotten hw-watchpoints after fork()-off of a process.
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Copyright 2012-2018 Free Software Foundation, Inc.
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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 "watchpoint-fork.h"
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#include <assert.h>
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#include <unistd.h>
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#include <sys/wait.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <asm/unistd.h>
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#include <unistd.h>
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#define gettid() syscall (__NR_gettid)
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/* Non-atomic `var++' should not hurt as we synchronize the threads by the STEP
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variable. Hit-comments need to be duplicated there to catch both at-stops
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and behind-stops, depending on the target. */
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volatile int var;
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void
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marker (void)
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{
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}
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static void
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empty (void)
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{
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}
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static void
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mark_exit (void)
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{
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}
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pthread_t thread;
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volatile int step;
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static void *
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start (void *arg)
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{
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int i;
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if (step >= 3)
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goto step_3;
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while (step != 1)
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{
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i = pthread_yield ();
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assert (i == 0);
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}
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var++; /* validity-thread-B */
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empty (); /* validity-thread-B */
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step = 2;
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while (step != 3)
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{
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if (step == 99)
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goto step_99;
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i = pthread_yield ();
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assert (i == 0);
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}
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step_3:
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if (step >= 5)
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goto step_5;
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var++; /* after-fork1-B */
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empty (); /* after-fork1-B */
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step = 4;
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while (step != 5)
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{
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if (step == 99)
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goto step_99;
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i = pthread_yield ();
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assert (i == 0);
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}
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step_5:
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var++; /* after-fork2-B */
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empty (); /* after-fork2-B */
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return (void *) 5UL;
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step_99:
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/* We must not get caught here (against a forgotten breakpoint). */
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var++;
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marker ();
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return (void *) 99UL;
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}
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int
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main (void)
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{
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int i;
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void *thread_result;
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setbuf (stdout, NULL);
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printf ("main: %d\n", (int) gettid ());
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/* General hardware breakpoints and watchpoints validity. */
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marker ();
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var++; /* validity-first */
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empty (); /* validity-first */
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i = pthread_create (&thread, NULL, start, NULL);
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assert (i == 0);
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var++; /* validity-thread-A */
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empty (); /* validity-thread-A */
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step = 1;
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while (step != 2)
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{
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i = pthread_yield ();
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assert (i == 0);
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}
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/* Hardware watchpoints got disarmed here. */
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forkoff (1);
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var++; /* after-fork1-A */
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empty (); /* after-fork1-A */
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step = 3;
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#ifdef FOLLOW_CHILD
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/* Spawn new thread as it was deleted in the child of FORK. */
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i = pthread_create (&thread, NULL, start, NULL);
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assert (i == 0);
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#endif
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while (step != 4)
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{
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i = pthread_yield ();
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assert (i == 0);
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}
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/* A sanity check for double hardware watchpoints removal. */
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forkoff (2);
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var++; /* after-fork2-A */
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empty (); /* after-fork2-A */
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step = 5;
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#ifdef FOLLOW_CHILD
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/* Spawn new thread as it was deleted in the child of FORK. */
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i = pthread_create (&thread, NULL, start, NULL);
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assert (i == 0);
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#endif
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i = pthread_join (thread, &thread_result);
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assert (i == 0);
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assert (thread_result == (void *) 5UL);
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mark_exit ();
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return 0;
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}
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