root/tools/testing/selftests/powerpc/tm/tm-exec.c

DEFINITIONS

1. test_exec
2. after_exec
3. main

   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 
  25 static char *path;
  26 
  27 static 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 
  45 static 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 
  58 int 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 }