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 } 79