granicus.if.org Git - strace/blob - tests/membarrier.c

   1 /*
   2  * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
   3  * Copyright (c) 2015-2019 The strace developers.
   4  * All rights reserved.
   5  *
   6  * SPDX-License-Identifier: GPL-2.0-or-later
   7  */
   8
   9 #include "tests.h"
  10 #include "scno.h"
  11
  12 #ifdef __NR_membarrier
  13
  14 # include <assert.h>
  15 # include <errno.h>
  16 # include <stdio.h>
  17 # include <unistd.h>
  18
  19 int
  20 main(void)
  21 {
  22         assert(syscall(__NR_membarrier, 3, 255) == -1);
  23         int saved_errno = errno;
  24         printf("membarrier(0x3 /* MEMBARRIER_CMD_??? */, 255) = %s\n",
  25                sprintrc(-1));
  26         if (saved_errno != ENOSYS) {
  27                 const char *text_global;
  28                 const char *text;
  29                 int rc = syscall(__NR_membarrier, 0, 0);
  30
  31                 assert(rc >= 0);
  32
  33                 text_global = rc & 1 ? "MEMBARRIER_CMD_GLOBAL" : "";
  34
  35                 switch (rc & ~1) {
  36                 case 0:
  37                         text = "";
  38                         break;
  39                 case 8:
  40                         text = "MEMBARRIER_CMD_PRIVATE_EXPEDITED";
  41                         break;
  42                 case 8|16:
  43                         text = "MEMBARRIER_CMD_PRIVATE_EXPEDITED|"
  44                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED";
  45                         break;
  46
  47                 case 2|4|8|16:
  48                         text = "MEMBARRIER_CMD_GLOBAL_EXPEDITED|"
  49                                "MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED|"
  50                                "MEMBARRIER_CMD_PRIVATE_EXPEDITED|"
  51                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED";
  52                         break;
  53
  54                 case 2|4|8|16|32|64:
  55                         text = "MEMBARRIER_CMD_GLOBAL_EXPEDITED|"
  56                                "MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED|"
  57                                "MEMBARRIER_CMD_PRIVATE_EXPEDITED|"
  58                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED|"
  59                                "MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE|"
  60                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE";
  61                         break;
  62
  63                 default:
  64                         error_msg_and_fail("membarrier returned %#x, does"
  65                                            " the test have to be updated?", rc);
  66                 }
  67                 printf("membarrier(MEMBARRIER_CMD_QUERY, 0) = %#x (%s%s%s)\n",
  68                        rc, text_global, text[0] && text_global[0] ? "|" : "",
  69                        text);
  70         }
  71         puts("+++ exited with 0 +++");
  72         return 0;
  73 }
  74
  75 #else
  76
  77 SKIP_MAIN_UNDEFINED("__NR_membarrier")
  78
  79 #endif