/*
 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@strace.io>
 * Copyright (c) 2015-2023 The strace developers.
 * All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "tests.h"
#include <stdio.h>
#include <stdint.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>

#define NANOSLEEP_NAME_RE "(nanosleep|clock_nanosleep(_time64)?)"
#define NANOSLEEP_CALL_RE "(nanosleep\\(|clock_nanosleep(_time64)?\\(CLOCK_REALTIME, 0, )"

int
main(void)
{
#if defined __x86_64__ && defined __ILP32__
	/*
	 * x32 is broken from the beginning:
	 * https://lkml.org/lkml/2015/11/30/790
	 */
	error_msg_and_skip("x32 is broken");
#else
	const sigset_t set = {};
	const struct sigaction act = { .sa_handler = SIG_IGN };
	const struct itimerval itv = { .it_interval.tv_usec = 22222,
				       .it_value.tv_usec = 11111 };
	const struct timespec req = { .tv_nsec = 222222222 };
	struct timespec rem = { 0xdefaced, 0xdefaced };

	if (sigaction(SIGALRM, &act, NULL))
		perror_msg_and_fail("sigaction");
	if (sigprocmask(SIG_SETMASK, &set, NULL))
		perror_msg_and_fail("sigprocmask");
	if (setitimer(ITIMER_REAL, &itv, NULL))
		perror_msg_and_skip("setitimer");
	if (nanosleep(&req, &rem))
		perror_msg_and_fail("nanosleep");

	printf("%s\\{tv_sec=0, tv_nsec=[0-9]+\\}"
	       ", \\{tv_sec=[0-9]+, tv_nsec=[0-9]+\\}\\)"
	       " = \\? ERESTART_RESTARTBLOCK \\(Interrupted by signal\\)\n",
	       NANOSLEEP_CALL_RE);
	puts("--- SIGALRM \\{si_signo=SIGALRM, si_code=SI_KERNEL\\} ---");
# ifdef __arm__
/* old kernels used to overwrite ARM_r0 with -EINTR */
#  define ALTERNATIVE_NANOSLEEP_REQ "0xfffffffc|"
# else
#  define ALTERNATIVE_NANOSLEEP_REQ ""
# endif
	printf("(%s(%s\\{tv_sec=0, tv_nsec=[0-9]+\\})"
	       ", 0x[[:xdigit:]]+|restart_syscall\\(<\\.\\.\\."
	       " resuming interrupted %s \\.\\.\\.>)\\) = 0\n",
	       NANOSLEEP_CALL_RE,
	       ALTERNATIVE_NANOSLEEP_REQ,
	       NANOSLEEP_NAME_RE);

	puts("!restart_syscall\\(<\\.\\.\\."
	     " resuming interrupted restart_syscall \\.\\.\\.>\\) = .*");

	puts("\\+\\+\\+ exited with 0 \\+\\+\\+");
	return 0;
#endif
}
