qemu

FORK: QEMU emulator
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test-bufferiszero.c (2121B)

      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 }