LXR qemu/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
  24static char buffer[8 * 1024 * 1024];
  25
  26static 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
  61static 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
  72int 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}
  79