blob: 8e0f2058c552f411651bdc8842074b849e27bad9 [file] [log] [blame]
/*
* This file is part of attach-f-p strace test.
*
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
#include <assert.h>
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <sys/syscall.h>
#include <unistd.h>
#define N 3
typedef union {
void *ptr;
pid_t pid;
} retval_t;
typedef struct {
sigset_t set;
unsigned int no;
} thread_arg_t;
static const char text_parent[] = "attach-f-p.test parent";
static const char *child[N] = {
"attach-f-p.test child 0",
"attach-f-p.test child 1",
"attach-f-p.test child 2"
};
static const int sigs[N] = { SIGALRM, SIGUSR1, SIGUSR2 };
static const struct itimerspec its[N] = {
{ .it_value.tv_sec = 1 },
{ .it_value.tv_sec = 2 },
{ .it_value.tv_sec = 3 }
};
static thread_arg_t args[N] = {
{ .no = 0 },
{ .no = 1 },
{ .no = 2 }
};
static void *
thread(void *a)
{
thread_arg_t *arg = a;
int signo;
errno = sigwait(&arg->set, &signo);
if (errno)
perror_msg_and_fail("sigwait");
assert(chdir(child[arg->no]) == -1);
retval_t retval = { .pid = syscall(__NR_gettid) };
return retval.ptr;
}
int
main(void)
{
static timer_t timerid[N];
pthread_t t[N];
unsigned int i;
for (i = 0; i < N; ++i) {
sigemptyset(&args[i].set);
sigaddset(&args[i].set, sigs[i]);
errno = pthread_sigmask(SIG_BLOCK, &args[i].set, NULL);
if (errno)
perror_msg_and_fail("pthread_sigmask");
}
for (i = 0; i < N; ++i) {
struct sigevent sev = {
.sigev_notify = SIGEV_SIGNAL,
.sigev_signo = sigs[i]
};
if (timer_create(CLOCK_MONOTONIC, &sev, &timerid[i]))
perror_msg_and_skip("timer_create");
if (timer_settime(timerid[i], 0, &its[i], NULL))
perror_msg_and_fail("timer_settime");
errno = pthread_create(&t[i], NULL, thread, (void *) &args[i]);
if (errno)
perror_msg_and_fail("pthread_create");
}
if (write(3, "\n", 1) != 1)
perror_msg_and_fail("write");
for (i = 0; i < N; ++i) {
retval_t retval;
errno = pthread_join(t[i], &retval.ptr);
if (errno)
perror_msg_and_fail("pthread_join");
errno = ENOENT;
printf("%-5d chdir(\"%s\") = -1 ENOENT (%m)\n"
"%-5d +++ exited with 0 +++\n",
retval.pid, child[i], retval.pid);
}
/* sleep a bit more to let the tracer catch up */
if (timer_settime(timerid[0], 0, &its[0], NULL))
perror_msg_and_fail("timer_settime");
int signo;
errno = sigwait(&args[0].set, &signo);
if (errno)
perror_msg_and_fail("sigwait");
pid_t pid = getpid();
assert(chdir(text_parent) == -1);
printf("%-5d chdir(\"%s\") = -1 ENOENT (%m)\n"
"%-5d +++ exited with 0 +++\n", pid, text_parent, pid);
return 0;
}