LXR linux/tools/testing/selftests/powerpc/tm/tm-exec.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright 2016, Cyril Bur, IBM Corp.
   4 *
   5 * Syscalls can be performed provided the transactions are suspended.
   6 * The exec() class of syscall is unique as a new process is loaded.
   7 *
   8 * It makes little sense for after an exec() call for the previously
   9 * suspended transaction to still exist.
  10 */
  11
  12#define _GNU_SOURCE
  13#include <errno.h>
  14#include <inttypes.h>
  15#include <libgen.h>
  16#include <pthread.h>
  17#include <stdio.h>
  18#include <stdlib.h>
  19#include <string.h>
  20#include <unistd.h>
  21
  22#include "utils.h"
  23#include "tm.h"
  24
  25static char *path;
  26
  27static int test_exec(void)
  28{
  29        SKIP_IF(!have_htm());
  30
  31        asm __volatile__(
  32                "tbegin.;"
  33                "blt    1f; "
  34                "tsuspend.;"
  35                "1: ;"
  36                : : : "memory");
  37
  38        execl(path, "tm-exec", "--child", NULL);
  39
  40        /* Shouldn't get here */
  41        perror("execl() failed");
  42        return 1;
  43}
  44
  45static int after_exec(void)
  46{
  47        asm __volatile__(
  48                "tbegin.;"
  49                "blt    1f;"
  50                "tsuspend.;"
  51                "1: ;"
  52                : : : "memory");
  53
  54        FAIL_IF(failure_is_nesting());
  55        return 0;
  56}
  57
  58int main(int argc, char *argv[])
  59{
  60        path = argv[0];
  61
  62        if (argc > 1 && strcmp(argv[1], "--child") == 0)
  63                return after_exec();
  64
  65        return test_harness(test_exec, "tm_exec");
  66}
  67