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/*
* Copyright (C) 2010 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*/
/* Check that clone() is implemented and properly works
*/
#define _GNU_SOURCE 1
#include <stdio.h>
#include <errno.h>
#include <sched.h>
#include <unistd.h>
#include <signal.h>
#include <stdlib.h>
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <stdarg.h>
#include <string.h>
static int
clone_child (void *arg)
{
errno = 0;
ptrace (PTRACE_TRACEME, 0, 0, 0);
if (errno != 0)
perror ("ptrace");
if (kill (getpid (), SIGSTOP) < 0)
perror ("kill");
return 0;
}
#define PAGE_SIZE 4096
#define STACK_SIZE (4 * PAGE_SIZE)
char clone_stack[STACK_SIZE] __attribute__ ((aligned (PAGE_SIZE)));
int
main ()
{
int pid,child;
int status;
pid = clone (clone_child, clone_stack + 3 * PAGE_SIZE,
CLONE_VM | SIGCHLD, NULL);
if (pid < 0)
{
perror ("clone");
exit (1);
}
printf ("child pid %d\n", pid);
//sleep(20);
child = waitpid (pid, &status, 0);
printf("waitpid returned %d\n", child);
if (child < 0) {
perror ("waitpid");
return 1;
}
printf ("child %d, status 0x%x\n", child, status);
return 0;
}
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