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/*
* Check for PTRACE_EVENT_EXEC diagnostics.
*
* Copyright (c) 2019 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2019-2020 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <unistd.h>
#include "scno.h"
#ifndef QUIET_MSG
# define QUIET_MSG 0
#endif
static pid_t leader;
static volatile unsigned int trigger;
static void *
thread(void *arg)
{
const char *argv[] = {((char **) arg)[0], "1", "2", NULL};
int tid = syscall(__NR_gettid);
printf("%-5d execveat(AT_FDCWD, \"%s\", [\"%s\", \"%s\", \"%s\"]"
", NULL, 0 <pid changed to %d ...>\n"
#if !QUIET_MSG
"%-5d +++ superseded by execve in pid %d +++\n"
#endif
, tid, argv[0], argv[0], argv[1], argv[2], leader
#if !QUIET_MSG
, leader, tid
#endif
);
while (!trigger) {
/* Wait for the parent to enter the busy loop. */
}
syscall(__NR_execveat, -100, argv[0], argv, NULL, 0);
perror_msg_and_fail("execveat");
}
int
main(int ac, char **av)
{
setvbuf(stdout, NULL, _IONBF, 0);
leader = getpid();
if (ac <= 1) {
char *argv[] = {av[0], (char *) "1", NULL};
printf("%-5d execveat(AT_FDCWD, \"%s\""
", [\"%s\", \"%s\"], NULL, 0) = 0\n",
leader, argv[0], argv[0], argv[1]);
syscall(__NR_execveat, -100, argv[0], argv, NULL, 0);
perror_msg_and_skip("execveat");
}
/*
* Since execveat is supported by the kernel,
* PTRACE_EVENT_EXEC support in the kernel is good enough.
*/
if (ac <= 2) {
pthread_t t;
errno = pthread_create(&t, NULL, thread, av);
if (errno)
perror_msg_and_fail("pthread_create");
for (;;)
++trigger;
}
printf("%-5d <... execveat resumed>) = 0\n"
"%-5d +++ exited with 0 +++\n",
leader, leader);
return 0;
}
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