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

   1 /*
   2  * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
   3  * Copyright (c) 2015-2018 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 <asm/unistd.h>
  11 #include "scno.h"
  12
  13 #ifdef __NR_membarrier
  14
  15 # include <assert.h>
  16 # include <errno.h>
  17 # include <stdio.h>
  18 # include <unistd.h>
  19
  20 int
  21 main(void)
  22 {
  23         assert(syscall(__NR_membarrier, 3, 255) == -1);
  24         int saved_errno = errno;
  25         printf("membarrier(0x3 /* MEMBARRIER_CMD_??? */, 255) = %s\n",
  26                sprintrc(-1));
  27         if (saved_errno != ENOSYS) {
  28                 const char *text_global;
  29                 const char *text;
  30                 int rc = syscall(__NR_membarrier, 0, 0);
  31
  32                 assert(rc >= 0);
  33
  34                 text_global = rc & 1 ? "MEMBARRIER_CMD_GLOBAL" : "";
  35
  36                 switch (rc & ~1) {
  37                 case 0:
  38                         text = "";
  39                         break;
  40                 case 8:
  41                         text = "MEMBARRIER_CMD_PRIVATE_EXPEDITED";
  42                         break;
  43                 case 8|16:
  44                         text = "MEMBARRIER_CMD_PRIVATE_EXPEDITED|"
  45                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED";
  46                         break;
  47
  48                 case 2|4|8|16:
  49                         text = "MEMBARRIER_CMD_GLOBAL_EXPEDITED|"
  50                                "MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED|"
  51                                "MEMBARRIER_CMD_PRIVATE_EXPEDITED|"
  52                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED";
  53                         break;
  54
  55                 case 2|4|8|16|32|64:
  56                         text = "MEMBARRIER_CMD_GLOBAL_EXPEDITED|"
  57                                "MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED|"
  58                                "MEMBARRIER_CMD_PRIVATE_EXPEDITED|"
  59                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED|"
  60                                "MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE|"
  61                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE";
  62                         break;
  63
  64                 default:
  65                         error_msg_and_fail("membarrier returned %#x, does"
  66                                            " the test have to be updated?", rc);
  67                 }
  68                 printf("membarrier(MEMBARRIER_CMD_QUERY, 0) = %#x (%s%s%s)\n",
  69                        rc, text_global, text[0] && text_global[0] ? "|" : "",
  70                        text);
  71         }
  72         puts("+++ exited with 0 +++");
  73         return 0;
  74 }
  75
  76 #else
  77
  78 SKIP_MAIN_UNDEFINED("__NR_membarrier")
  79
  80 #endif