uspace/app/tester/mm/pager1.c

   1 /*
   2  * Copyright (c) 2016 Jakub Jermar
   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  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <stdio.h>
  30 #include <vfs/vfs.h>
  31 #include <stdlib.h>
  32 #include <as.h>
  33 #include <ns.h>
  34 #include <async.h>
  35 #include <errno.h>
  36 #include "../tester.h"
  37
  38 #define TEST_FILE       "/tmp/testfile"
  39
  40 const char text[] = "Hello world!";
  41
  42 int fd;
  43
  44 static void *create_paged_area(size_t size)
  45 {
  46         size_t nwr;
  47         errno_t rc;
  48
  49         TPRINTF("Creating temporary file...\n");
  50
  51         rc = vfs_lookup_open(TEST_FILE, WALK_REGULAR | WALK_MAY_CREATE,
  52             MODE_READ | MODE_WRITE, &fd);
  53         if (rc != EOK)
  54                 return NULL;
  55         (void) vfs_unlink_path(TEST_FILE);
  56
  57         rc = vfs_write(fd, (aoff64_t []) { 0 }, text, sizeof(text), &nwr);
  58         if (rc != EOK) {
  59                 vfs_put(fd);
  60                 return NULL;
  61         }
  62
  63         async_sess_t *vfs_pager_sess;
  64
  65         TPRINTF("Connecting to VFS pager...\n");
  66
  67         vfs_pager_sess = service_connect_blocking(SERVICE_VFS, INTERFACE_PAGER,
  68             0, NULL);
  69
  70         if (!vfs_pager_sess) {
  71                 vfs_put(fd);
  72                 return NULL;
  73         }
  74
  75         TPRINTF("Creating AS area...\n");
  76
  77         void *result = async_as_area_create(AS_AREA_ANY, size,
  78             AS_AREA_READ | AS_AREA_CACHEABLE, vfs_pager_sess, fd, 0, 0);
  79         if (result == AS_MAP_FAILED) {
  80                 vfs_put(fd);
  81                 return NULL;
  82         }
  83
  84         return result;
  85 }
  86
  87 static void touch_area(void *area, size_t size)
  88 {
  89         TPRINTF("Touching (faulting-in) AS area...\n");
  90
  91         volatile char *ptr = (char *) area;
  92
  93         char ch;
  94         while ((ch = *ptr++))
  95                 putchar(ch);
  96 }
  97
  98 const char *test_pager1(void)
  99 {
 100         size_t buffer_len = PAGE_SIZE;
 101         void *buffer = create_paged_area(buffer_len);
 102         if (!buffer)
 103                 return "Cannot allocate memory";
 104
 105         touch_area(buffer, buffer_len);
 106
 107         as_area_destroy(buffer);
 108         vfs_put(fd);
 109
 110         return NULL;
 111 }