1e903e3203
This testcase currently fails to compile on Fedora 23:
.../src/gdb/testsuite/gdb.threads/watchpoint-fork-mt.c: In function 'start':
.../src/gdb/testsuite/gdb.threads/watchpoint-fork-mt.c:70:11: warning: implicit declaration of function 'pthread_yield' [-Wimplicit-function-declaration]
i = pthread_yield ();
^
.../src/gdb/testsuite/gdb.threads/watchpoint-fork-child.c: In function 'forkoff':
.../src/gdb/testsuite/gdb.threads/watchpoint-fork-child.c:114:8: warning: implicit declaration of function 'pthread_yield' [-Wimplicit-function-declaratio
n]
i = pthread_yield ();
^
/tmp/ccUkNIsI.o: In function `start':
.../src/gdb/testsuite/gdb.threads/watchpoint-fork-mt.c:70: undefined reference to `pthread_yield'
(...)
collect2: error: ld returned 1 exit status
UNSUPPORTED: gdb.threads/watchpoint-fork.exp: child: multithreaded: Couldn't compile watchpoint-fork-child.c: unrecognized error
UNTESTED: gdb.threads/watchpoint-fork.exp: child: multithreaded: watchpoint-fork.exp
testcase .../src/gdb/testsuite/gdb.threads/watchpoint-fork.exp completed i
The glibc manual says, on _GNU_SOURCE:
"You should define these macros by using ‘#define’ preprocessor
directives at the top of your source code files. These directives must
come before any #include of a system header file."
I instead put it in the header all the .c files of the testcase must
include anyway.
gdb/testsuite/ChangeLog:
2016-03-01 Pedro Alves <palves@redhat.com>
* gdb.threads/watchpoint-fork-child.c: Include "watchpoint-fork.h"
before anything else.
* gdb.threads/watchpoint-fork-mt.c: Likewise. Don't define
_GNU_SOURCE here.
* gdb.threads/watchpoint-fork-st.c: Include "watchpoint-fork.h"
before anything else.
* gdb.threads/watchpoint-fork.h: Define _GNU_SOURCE.
127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
/* Test case for forgotten hw-watchpoints after fork()-off of a process.
|
|
|
|
Copyright 2012-2016 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include "watchpoint-fork.h"
|
|
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <assert.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
|
|
/* `pid_t' may not be available. */
|
|
|
|
static volatile int usr1_got;
|
|
|
|
static void
|
|
handler_usr1 (int signo)
|
|
{
|
|
usr1_got++;
|
|
}
|
|
|
|
void
|
|
forkoff (int nr)
|
|
{
|
|
int child, save_parent = getpid ();
|
|
int i;
|
|
struct sigaction act, oldact;
|
|
#ifdef THREAD
|
|
void *thread_result;
|
|
#endif
|
|
|
|
memset (&act, 0, sizeof act);
|
|
act.sa_flags = SA_RESTART;
|
|
act.sa_handler = handler_usr1;
|
|
sigemptyset (&act.sa_mask);
|
|
i = sigaction (SIGUSR1, &act, &oldact);
|
|
assert (i == 0);
|
|
|
|
child = fork ();
|
|
switch (child)
|
|
{
|
|
case -1:
|
|
assert (0);
|
|
default:
|
|
printf ("parent%d: %d\n", nr, (int) child);
|
|
|
|
/* Sleep for a while to possibly get incorrectly ATTACH_THREADed by GDB
|
|
tracing the child fork with no longer valid thread/lwp entries of the
|
|
parent. */
|
|
|
|
i = sleep (2);
|
|
assert (i == 0);
|
|
|
|
/* We must not get caught here (against a forgotten breakpoint). */
|
|
|
|
var++;
|
|
marker ();
|
|
|
|
#ifdef THREAD
|
|
/* And neither got caught our thread. */
|
|
|
|
step = 99;
|
|
i = pthread_join (thread, &thread_result);
|
|
assert (i == 0);
|
|
assert (thread_result == (void *) 99UL);
|
|
#endif
|
|
|
|
/* Be sure our child knows we did not get caught above. */
|
|
|
|
i = kill (child, SIGUSR1);
|
|
assert (i == 0);
|
|
|
|
/* Sleep for a while to check GDB's `info threads' no longer tracks us in
|
|
the child fork. */
|
|
|
|
i = sleep (2);
|
|
assert (i == 0);
|
|
|
|
_exit (0);
|
|
case 0:
|
|
printf ("child%d: %d\n", nr, (int) getpid ());
|
|
|
|
/* Let the parent signal us about its success. Be careful of races. */
|
|
|
|
for (;;)
|
|
{
|
|
/* Parent either died (and USR1_GOT is zero) or it succeeded. */
|
|
if (getppid () != save_parent)
|
|
break;
|
|
if (kill (getppid (), 0) != 0)
|
|
break;
|
|
/* Parent succeeded? */
|
|
if (usr1_got)
|
|
break;
|
|
|
|
#ifdef THREAD
|
|
i = pthread_yield ();
|
|
assert (i == 0);
|
|
#endif
|
|
}
|
|
assert (usr1_got);
|
|
|
|
/* We must get caught here (against a false watchpoint removal). */
|
|
|
|
marker ();
|
|
}
|
|
|
|
i = sigaction (SIGUSR1, &oldact, NULL);
|
|
assert (i == 0);
|
|
}
|