tm-fork.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright 2015, Michael Neuling, IBM Corp.
 4 *
 5 * Edited: Rashmica Gupta, Nov 2015
 6 *
 7 * This test does a fork syscall inside a transaction. Basic sniff test
 8 * to see if we can enter the kernel during a transaction.
 9 */
10
11#include <errno.h>
12#include <inttypes.h>
13#include <pthread.h>
14#include <stdio.h>
15#include <stdlib.h>
16#include <unistd.h>
17
18#include "utils.h"
19#include "tm.h"
20
21int test_fork(void)
22{
23	SKIP_IF(!have_htm());
24	SKIP_IF(htm_is_synthetic());
25
26	asm __volatile__(
27		"tbegin.;"
28		"blt    1f; "
29		"li     0, 2;"  /* fork syscall */
30		"sc  ;"
31		"tend.;"
32		"1: ;"
33		: : : "memory", "r0");
34	/* If we reach here, we've passed.  Otherwise we've probably crashed
35	 * the kernel */
36
37	return 0;
38}
39
40int main(int argc, char *argv[])
41{
42	return test_harness(test_fork, "tm_fork");
43}