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

   1 /*
   2  * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include "tests.h"
  29 #include <asm/unistd.h>
  30 #include "scno.h"
  31
  32 #ifdef __NR_membarrier
  33
  34 # include <assert.h>
  35 # include <errno.h>
  36 # include <stdio.h>
  37 # include <unistd.h>
  38
  39 int
  40 main(void)
  41 {
  42         assert(syscall(__NR_membarrier, 3, 255) == -1);
  43         int saved_errno = errno;
  44         printf("membarrier(0x3 /* MEMBARRIER_CMD_??? */, 255) = %s\n",
  45                sprintrc(-1));
  46         if (saved_errno != ENOSYS) {
  47                 const char *text_global;
  48                 const char *text;
  49                 int rc = syscall(__NR_membarrier, 0, 0);
  50
  51                 assert(rc >= 0);
  52
  53                 text_global = rc & 1 ? "MEMBARRIER_CMD_GLOBAL" : "";
  54
  55                 switch (rc & ~1) {
  56                 case 0:
  57                         text = "";
  58                         break;
  59                 case 8:
  60                         text = "MEMBARRIER_CMD_PRIVATE_EXPEDITED";
  61                         break;
  62                 case 8|16:
  63                         text = "MEMBARRIER_CMD_PRIVATE_EXPEDITED|"
  64                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED";
  65                         break;
  66
  67                 case 2|4|8|16:
  68                         text = "MEMBARRIER_CMD_GLOBAL_EXPEDITED|"
  69                                "MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED|"
  70                                "MEMBARRIER_CMD_PRIVATE_EXPEDITED|"
  71                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED";
  72                         break;
  73
  74                 case 2|4|8|16|32|64:
  75                         text = "MEMBARRIER_CMD_GLOBAL_EXPEDITED|"
  76                                "MEMBARRIER_CMD_REGISTER_GLOBAL_EXPEDITED|"
  77                                "MEMBARRIER_CMD_PRIVATE_EXPEDITED|"
  78                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED|"
  79                                "MEMBARRIER_CMD_PRIVATE_EXPEDITED_SYNC_CORE|"
  80                                "MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_SYNC_CORE";
  81                         break;
  82
  83                 default:
  84                         error_msg_and_fail("membarrier returned %#x, does"
  85                                            " the test have to be updated?", rc);
  86                 }
  87                 printf("membarrier(MEMBARRIER_CMD_QUERY, 0) = %#x (%s%s%s)\n",
  88                        rc, text_global, text[0] && text_global[0] ? "|" : "",
  89                        text);
  90         }
  91         puts("+++ exited with 0 +++");
  92         return 0;
  93 }
  94
  95 #else
  96
  97 SKIP_MAIN_UNDEFINED("__NR_membarrier")
  98
  99 #endif