LXR linux/tools/testing/selftests/powerpc/tm/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}
  44