tests/unit/test-bufferiszero.c

   1 /*
   2  * QEMU buffer_is_zero test
   3  *
   4  * Copyright (c) 2016 Red Hat, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "qemu/cutils.h"
  23
  24 static char buffer[8 * 1024 * 1024];
  25
  26 static void test_1(void)
  27 {
  28     size_t s, a, o;
  29
  30     /* Basic positive test.  */
  31     g_assert(buffer_is_zero(buffer, sizeof(buffer)));
  32
  33     /* Basic negative test.  */
  34     buffer[sizeof(buffer) - 1] = 1;
  35     g_assert(!buffer_is_zero(buffer, sizeof(buffer)));
  36     buffer[sizeof(buffer) - 1] = 0;
  37
  38     /* Positive tests for size and alignment.  */
  39     for (a = 1; a <= 64; a++) {
  40         for (s = 1; s < 1024; s++) {
  41             buffer[a - 1] = 1;
  42             buffer[a + s] = 1;
  43             g_assert(buffer_is_zero(buffer + a, s));
  44             buffer[a - 1] = 0;
  45             buffer[a + s] = 0;
  46         }
  47     }
  48
  49     /* Negative tests for size, alignment, and the offset of the marker.  */
  50     for (a = 1; a <= 64; a++) {
  51         for (s = 1; s < 1024; s++) {
  52             for (o = 0; o < s; ++o) {
  53                 buffer[a + o] = 1;
  54                 g_assert(!buffer_is_zero(buffer + a, s));
  55                 buffer[a + o] = 0;
  56             }
  57         }
  58     }
  59 }
  60
  61 static void test_2(void)
  62 {
  63     if (g_test_perf()) {
  64         test_1();
  65     } else {
  66         do {
  67             test_1();
  68         } while (test_buffer_is_zero_next_accel());
  69     }
  70 }
  71
  72 int main(int argc, char **argv)
  73 {
  74     g_test_init(&argc, &argv, NULL);
  75     g_test_add_func("/cutils/bufferiszero", test_2);
  76
  77     return g_test_run();
  78 }