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/*
* Check handling of CLONE_PARENT'ed processes.
*
* Copyright (c) 2017-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <errno.h>
#include <sched.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>
static int
child(void *const arg)
{
return 42;
}
#define child_stack_size (get_page_size() / 2)
#ifdef IA64
extern int __clone2(int (*)(void *), void *, size_t, int, void *, ...);
# define clone(fn, child_stack, flags, arg) \
__clone2(fn, child_stack, child_stack_size, flags, arg)
#endif
int
main(void)
{
const pid_t pid = clone(child, tail_alloc(child_stack_size),
CLONE_PARENT | SIGCHLD, 0);
if (pid < 0)
perror_msg_and_fail("clone");
int status;
if (wait(&status) >= 0)
error_msg_and_fail("unexpected return code from wait");
while (!kill(pid, 0))
;
if (errno != ESRCH)
perror_msg_and_fail("kill");
FILE *const fp = fdopen(3, "a");
if (!fp)
perror_msg_and_fail("fdopen");
if (fprintf(fp, "%s: Exit of unknown pid %d ignored\n",
getenv("STRACE_EXE") ?: "strace", pid) < 0)
perror_msg_and_fail("fprintf");
puts("+++ exited with 0 +++");
return 0;
}
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