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        SKIP_IF(htm_is_synthetic());
  31
  32        asm __volatile__(
  33                "tbegin.;"
  34                "blt    1f; "
  35                "tsuspend.;"
  36                "1: ;"
  37                : : : "memory");
  38
  39        execl(path, "tm-exec", "--child", NULL);
  40
  41        /* Shouldn't get here */
  42        perror("execl() failed");
  43        return 1;
  44}
  45
  46static int after_exec(void)
  47{
  48        asm __volatile__(
  49                "tbegin.;"
  50                "blt    1f;"
  51                "tsuspend.;"
  52                "1: ;"
  53                : : : "memory");
  54
  55        FAIL_IF(failure_is_nesting());
  56        return 0;
  57}
  58
  59int main(int argc, char *argv[])
  60{
  61        path = argv[0];
  62
  63        if (argc > 1 && strcmp(argv[1], "--child") == 0)
  64                return after_exec();
  65
  66        return test_harness(test_exec, "tm_exec");
  67}
  68