1b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris/* 2b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * Copyright (C) 2013 The Android Open Source Project 3b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * 4b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * Licensed under the Apache License, Version 2.0 (the "License"); 5b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * you may not use this file except in compliance with the License. 6b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * You may obtain a copy of the License at 7b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * 8b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * http://www.apache.org/licenses/LICENSE-2.0 9b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * 10b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * Unless required by applicable law or agreed to in writing, software 11b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * distributed under the License is distributed on an "AS IS" BASIS, 12b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * See the License for the specific language governing permissions and 14b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris * limitations under the License. 15b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris */ 16b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 17b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris#include <stdlib.h> 18b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris#include <string.h> 19b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris#include <sys/mman.h> 20b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 21b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris#include <gtest/gtest.h> 22b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris#include "buffer_tests.h" 23b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 24e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris// For the comparison buffer tests, the maximum length to test for the 25e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris// miscompare checks. 26e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris#define MISCMP_MAX_LENGTH 512 27e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 28b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris#define FENCEPOST_LENGTH 8 29b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 30b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisstatic int g_single_aligns[][2] = { 31b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // Both buffers at same alignment. 32b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 1, 0 }, 33b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 2, 0 }, 34b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 0 }, 35b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 0 }, 36b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 16, 0 }, 37b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 32, 0 }, 38b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 64, 0 }, 39b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 0 }, 40b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 41b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // General unaligned cases. 42b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 1 }, 43b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 2 }, 44b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 3 }, 45b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 46b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 1 }, 47b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 2 }, 48b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 3 }, 49b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 4 }, 50b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 5 }, 51b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 6 }, 52b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 7 }, 53b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 54b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 1 }, 55b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 4 }, 56b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 8 }, 57b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 12 }, 58b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 16 }, 59b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris}; 60b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 61b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisstatic const size_t g_single_aligns_len = sizeof(g_single_aligns)/sizeof(int[2]); 62b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 63b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris// Set of multiple buffer alignment combinations to be used for string/memory 64b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris// testing routines. 65b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisstatic int g_double_aligns[][4] = { 66b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // Both buffers at same alignment. 67b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 1, 0, 1, 0 }, 68b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 2, 0, 2, 0 }, 69b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 0, 4, 0 }, 70b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 0, 8, 0 }, 71b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 16, 0, 16, 0 }, 72b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 32, 0, 32, 0 }, 73b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 64, 0, 64, 0 }, 74b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 0, 128, 0 }, 75b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 76b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // Different word alignments between buffers. 77b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 0, 4, 0 }, 78b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 0, 8, 0 }, 79b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 16, 0, 4, 0 }, 80b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 0, 16, 0 }, 81b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 82b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // General unaligned cases. 83b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 0, 4, 1 }, 84b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 0, 4, 2 }, 85b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 0, 4, 3 }, 86b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 87b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 1, 4, 0 }, 88b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 1, 4, 1 }, 89b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 1, 4, 2 }, 90b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 1, 4, 3 }, 91b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 92b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 2, 4, 0 }, 93b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 2, 4, 1 }, 94b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 2, 4, 2 }, 95b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 2, 4, 3 }, 96b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 97b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 3, 4, 0 }, 98b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 3, 4, 1 }, 99b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 3, 4, 2 }, 100b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 4, 3, 4, 3 }, 101b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 102b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 0, 8, 1 }, 103b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 0, 8, 2 }, 104b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 0, 8, 3 }, 105b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 0, 8, 4 }, 106b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 0, 8, 5 }, 107b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 0, 8, 6 }, 108b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 0, 8, 7 }, 109b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 110b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 1, 8, 0 }, 111b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 1, 8, 1 }, 112b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 1, 8, 2 }, 113b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 1, 8, 3 }, 114b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 1, 8, 4 }, 115b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 1, 8, 5 }, 116b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 1, 8, 6 }, 117b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 1, 8, 7 }, 118b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 119b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 2, 8, 0 }, 120b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 2, 8, 1 }, 121b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 2, 8, 2 }, 122b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 2, 8, 3 }, 123b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 2, 8, 4 }, 124b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 2, 8, 5 }, 125b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 2, 8, 6 }, 126b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 2, 8, 7 }, 127b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 128b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 3, 8, 0 }, 129b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 3, 8, 1 }, 130b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 3, 8, 2 }, 131b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 3, 8, 3 }, 132b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 3, 8, 4 }, 133b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 3, 8, 5 }, 134b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 3, 8, 6 }, 135b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 3, 8, 7 }, 136b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 137b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 4, 8, 0 }, 138b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 4, 8, 1 }, 139b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 4, 8, 2 }, 140b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 4, 8, 3 }, 141b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 4, 8, 4 }, 142b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 4, 8, 5 }, 143b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 4, 8, 6 }, 144b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 4, 8, 7 }, 145b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 146b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 5, 8, 0 }, 147b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 5, 8, 1 }, 148b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 5, 8, 2 }, 149b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 5, 8, 3 }, 150b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 5, 8, 4 }, 151b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 5, 8, 5 }, 152b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 5, 8, 6 }, 153b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 5, 8, 7 }, 154b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 155b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 6, 8, 0 }, 156b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 6, 8, 1 }, 157b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 6, 8, 2 }, 158b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 6, 8, 3 }, 159b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 6, 8, 4 }, 160b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 6, 8, 5 }, 161b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 6, 8, 6 }, 162b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 6, 8, 7 }, 163b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 164b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 7, 8, 0 }, 165b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 7, 8, 1 }, 166b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 7, 8, 2 }, 167b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 7, 8, 3 }, 168b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 7, 8, 4 }, 169b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 7, 8, 5 }, 170b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 7, 8, 6 }, 171b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 8, 7, 8, 7 }, 172b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 173b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 1, 128, 4 }, 174b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 1, 128, 8 }, 175b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 1, 128, 12 }, 176b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 1, 128, 16 }, 177b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 4, 128, 1 }, 178b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 8, 128, 1 }, 179b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 12, 128, 1 }, 180b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris { 128, 16, 128, 1 }, 181b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris}; 182b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 183b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisstatic const size_t g_double_aligns_len = sizeof(g_double_aligns)/sizeof(int[4]); 184b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 185b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisstatic size_t SetIncrement(size_t len) { 186b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris if (len >= 4096) { 187b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris return 1024; 188b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } else if (len >= 1024) { 189b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris return 256; 190b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 191b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris return 1; 192b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris} 193b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 194b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris// Return a pointer into the current buffer with the specified alignment. 195b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisstatic void *GetAlignedPtr(void *orig_ptr, int alignment, int or_mask) { 196b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris uint64_t ptr = reinterpret_cast<uint64_t>(orig_ptr); 197b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris if (alignment > 0) { 198b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // When setting the alignment, set it to exactly the alignment chosen. 199b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // The pointer returned will be guaranteed not to be aligned to anything 200b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // more than that. 201b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris ptr += alignment - (ptr & (alignment - 1)); 202b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris ptr |= alignment | or_mask; 203b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 204b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 205b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris return reinterpret_cast<void*>(ptr); 206b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris} 207b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 208b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisstatic void SetFencepost(uint8_t *buffer) { 209b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris for (int i = 0; i < FENCEPOST_LENGTH; i += 2) { 210b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris buffer[i] = 0xde; 211b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris buffer[i+1] = 0xad; 212b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 213b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris} 214b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 215b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisstatic void VerifyFencepost(uint8_t *buffer) { 216b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris for (int i = 0; i < FENCEPOST_LENGTH; i += 2) { 217b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris if (buffer[i] != 0xde || buffer[i+1] != 0xad) { 218b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris uint8_t expected_value; 219b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris if (buffer[i] == 0xde) { 220b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris i++; 221b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris expected_value = 0xad; 222b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } else { 223b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris expected_value = 0xde; 224b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 225b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris ASSERT_EQ(expected_value, buffer[i]); 226b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 227b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 228b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris} 229b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 230b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisvoid RunSingleBufferAlignTest( 231b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris size_t max_test_size, void (*test_func)(uint8_t*, size_t), 232b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris size_t (*set_incr)(size_t)) { 233b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris if (!set_incr) { 234b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris set_incr = SetIncrement; 235b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 236b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 237b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // Allocate one large buffer with lots of extra space so that we can 238b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // guarantee that the all possible alignments will fit. 239b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris uint8_t *buf = new uint8_t[3*max_test_size]; 240b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 241b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris uint8_t *buf_align; 242b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris for (size_t i = 0; i < g_single_aligns_len; i++) { 243b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris size_t incr = 1; 244b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris for (size_t len = 0; len <= max_test_size; len += incr) { 245b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris incr = set_incr(len); 246b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 247b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris buf_align = reinterpret_cast<uint8_t*>(GetAlignedPtr( 248b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris buf+FENCEPOST_LENGTH, g_single_aligns[i][0], g_single_aligns[i][1])); 249b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 250b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris SetFencepost(&buf_align[-FENCEPOST_LENGTH]); 251b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris SetFencepost(&buf_align[len]); 252b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 253b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris test_func(buf_align, len); 254b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 255e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris VerifyFencepost(&buf_align[-FENCEPOST_LENGTH]); 256b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris VerifyFencepost(&buf_align[len]); 257b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 258b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 2594d44675283e6c92d3294592be4fce7c9d89c19b6Pirama Arumuga Nainar delete[] buf; 260b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris} 261b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 262b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisvoid RunSrcDstBufferAlignTest( 263b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris size_t max_test_size, void (*test_func)(uint8_t*, uint8_t*, size_t), 264b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris size_t (*set_incr)(size_t)) { 265b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris if (!set_incr) { 266b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris set_incr = SetIncrement; 267b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 268b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 269b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // Allocate two large buffers for all of the testing. 270b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris uint8_t* src = new uint8_t[3*max_test_size]; 271b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris uint8_t* dst = new uint8_t[3*max_test_size]; 272b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 273b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris uint8_t* src_align; 274b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris uint8_t* dst_align; 275b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris for (size_t i = 0; i < g_double_aligns_len; i++) { 276b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris size_t incr = 1; 277b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris for (size_t len = 0; len <= max_test_size; len += incr) { 278b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris incr = set_incr(len); 279b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 280b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris src_align = 281b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris reinterpret_cast<uint8_t*>(GetAlignedPtr( 282b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris src+FENCEPOST_LENGTH, g_double_aligns[i][0], g_double_aligns[i][1])); 283b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris dst_align = 284b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris reinterpret_cast<uint8_t*>(GetAlignedPtr( 285b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris dst+FENCEPOST_LENGTH, g_double_aligns[i][2], g_double_aligns[i][3])); 286b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris SetFencepost(&dst_align[-FENCEPOST_LENGTH]); 287b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris SetFencepost(&dst_align[len]); 288b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 289b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris test_func(src_align, dst_align, len); 290b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 291e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris VerifyFencepost(&dst_align[-FENCEPOST_LENGTH]); 292b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris VerifyFencepost(&dst_align[len]); 293b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 294b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 2954d44675283e6c92d3294592be4fce7c9d89c19b6Pirama Arumuga Nainar delete[] src; 2964d44675283e6c92d3294592be4fce7c9d89c19b6Pirama Arumuga Nainar delete[] dst; 297b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris} 298b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 299e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferrisvoid RunCmpBufferAlignTest( 300e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris size_t max_test_size, void (*test_cmp_func)(uint8_t*, uint8_t*, size_t), 301e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris void (*test_miscmp_func)(uint8_t*, uint8_t*, size_t, size_t), 302e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris size_t (*set_incr)(size_t)) { 303e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris if (!set_incr) { 304e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris set_incr = SetIncrement; 305e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris } 306e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 307e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris // Allocate two large buffers for all of the testing. 308e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris uint8_t* buf1 = new uint8_t[3*max_test_size]; 309e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris uint8_t* buf2 = new uint8_t[3*max_test_size]; 310e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 311e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris uint8_t* buf1_align; 312e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris uint8_t* buf2_align; 313e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris for (size_t i = 0; i < g_double_aligns_len; i++) { 314e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris size_t incr = 1; 315e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris for (size_t len = 0; len <= max_test_size; len += incr) { 316e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris incr = set_incr(len); 317e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 318e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris buf1_align = 319e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris reinterpret_cast<uint8_t*>(GetAlignedPtr( 320e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris buf1, g_double_aligns[i][0], g_double_aligns[i][1])); 321e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris buf2_align = 322e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris reinterpret_cast<uint8_t*>(GetAlignedPtr( 323e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris buf2, g_double_aligns[i][2], g_double_aligns[i][3])); 324e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 325e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris // Check by putting all zeroes after both buffers. 326e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris memset(buf1_align+len, 0, 32); 327e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris memset(buf2_align+len, 0, 32); 328e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris test_cmp_func(buf1_align, buf2_align, len); 329e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 330e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris // Check by putting different values after both buffers. 331e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris for (size_t j = 0; j < 32; j++) { 332e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris buf1_align[len+j] = j; 333e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris buf2_align[len+j] = j+1; 334e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris } 335e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris test_cmp_func(buf1_align, buf2_align, len); 336e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 337e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris if (len > 0) { 338e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris // Change the lengths of the buffers and verify that there are 339e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris // miscompares. 340e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris for (size_t len2 = len+1; len2 < len+32; len2++) { 341e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris test_miscmp_func(buf1_align, buf2_align, len, len2); 342e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris test_miscmp_func(buf1_align, buf2_align, len2, len); 343e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris } 344e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris } 345e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris } 346e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris } 3474d44675283e6c92d3294592be4fce7c9d89c19b6Pirama Arumuga Nainar delete[] buf1; 3484d44675283e6c92d3294592be4fce7c9d89c19b6Pirama Arumuga Nainar delete[] buf2; 349e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris} 350e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 351b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisvoid RunSingleBufferOverreadTest(void (*test_func)(uint8_t*, size_t)) { 352b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // In order to verify that functions are not reading past the end of the 353b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // src, create data that ends exactly at an unreadable memory boundary. 354b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris size_t pagesize = static_cast<size_t>(sysconf(_SC_PAGE_SIZE)); 355b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris uint8_t* memory; 356b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris ASSERT_TRUE(posix_memalign(reinterpret_cast<void**>(&memory), pagesize, 357b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 2*pagesize) == 0); 358b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris memset(memory, 0x23, 2*pagesize); 359b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 360b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // Make the second page unreadable and unwritable. 361b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris ASSERT_TRUE(mprotect(&memory[pagesize], pagesize, PROT_NONE) == 0); 362b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 363b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris for (size_t i = 0; i < pagesize; i++) { 364b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris uint8_t* buf = &memory[pagesize-i]; 365b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 366b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris test_func(buf, i); 367b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 368b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris ASSERT_TRUE(mprotect(&memory[pagesize], pagesize, PROT_READ | PROT_WRITE) == 0); 369b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris free(memory); 370b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris} 371b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 372b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferrisvoid RunSrcDstBufferOverreadTest(void (*test_func)(uint8_t*, uint8_t*, size_t)) { 373b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // In order to verify that functions are not reading past the end of the 374b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // src, create data that ends exactly at an unreadable memory boundary. 375b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris size_t pagesize = static_cast<size_t>(sysconf(_SC_PAGE_SIZE)); 376b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris uint8_t* memory; 377b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris ASSERT_TRUE(posix_memalign(reinterpret_cast<void**>(&memory), pagesize, 378b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 2*pagesize) == 0); 379b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris memset(memory, 0x23, 2*pagesize); 380b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 381b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris // Make the second page unreadable and unwritable. 382b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris ASSERT_TRUE(mprotect(&memory[pagesize], pagesize, PROT_NONE) == 0); 383b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris 384fdfcfce7c6392d32f95a9f776ecd13da205b906cChristopher Ferris uint8_t* dst_buffer = new uint8_t[2*pagesize]; 385fdfcfce7c6392d32f95a9f776ecd13da205b906cChristopher Ferris // Change the dst alignment as we change the source. 386fdfcfce7c6392d32f95a9f776ecd13da205b906cChristopher Ferris for (size_t i = 0; i < 16; i++) { 387fdfcfce7c6392d32f95a9f776ecd13da205b906cChristopher Ferris uint8_t* dst = &dst_buffer[i]; 388fdfcfce7c6392d32f95a9f776ecd13da205b906cChristopher Ferris for (size_t j = 0; j < pagesize; j++) { 389fdfcfce7c6392d32f95a9f776ecd13da205b906cChristopher Ferris uint8_t* src = &memory[pagesize-j]; 390fdfcfce7c6392d32f95a9f776ecd13da205b906cChristopher Ferris 391fdfcfce7c6392d32f95a9f776ecd13da205b906cChristopher Ferris test_func(src, dst, j); 392fdfcfce7c6392d32f95a9f776ecd13da205b906cChristopher Ferris } 393b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris } 394b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris ASSERT_TRUE(mprotect(&memory[pagesize], pagesize, PROT_READ | PROT_WRITE) == 0); 395b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris free(memory); 396fdfcfce7c6392d32f95a9f776ecd13da205b906cChristopher Ferris delete[] dst_buffer; 397b687ad3c3491fffe22507cafc9347e10cbf6bd31Christopher Ferris} 398e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 399e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferrisvoid RunCmpBufferOverreadTest( 400e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris void (*test_cmp_func)(uint8_t*, uint8_t*, size_t), 401e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris void (*test_miscmp_func)(uint8_t*, uint8_t*, size_t, size_t)) { 402e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris // In order to verify that functions are not reading past the end of either 403e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris // of the bufs, create both buffers that end exactly at an unreadable memory 404e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris // boundary. 405e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris size_t pagesize = static_cast<size_t>(sysconf(_SC_PAGE_SIZE)); 406e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris uint8_t* memory1; 407e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris ASSERT_TRUE(posix_memalign(reinterpret_cast<void**>(&memory1), pagesize, 408e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 2*pagesize) == 0); 409e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris memset(memory1, 0x23, 2*pagesize); 410e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 411e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris // Make the second page unreadable and unwritable. 412e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris ASSERT_TRUE(mprotect(&memory1[pagesize], pagesize, PROT_NONE) == 0); 413e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 414e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris uint8_t* memory2; 415e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris ASSERT_TRUE(posix_memalign(reinterpret_cast<void**>(&memory2), pagesize, 416e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 2*pagesize) == 0); 417e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris memset(memory2, 0x23, 2*pagesize); 418e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 419e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris // Make the second page unreadable and unwritable. 420e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris ASSERT_TRUE(mprotect(&memory2[pagesize], pagesize, PROT_NONE) == 0); 421e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 422e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris for (size_t i = 0; i < pagesize; i++) { 423e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris uint8_t* buf1 = &memory1[pagesize-i]; 424e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris uint8_t* buf2 = &memory2[pagesize-i]; 425e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 426e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris test_cmp_func(buf1, buf2, i); 427e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris } 428e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 429e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris // Don't cycle through pagesize, MISCMP_MAX_LENGTH bytes should be good. 430e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris size_t miscmp_len; 431e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris if (pagesize > MISCMP_MAX_LENGTH) { 432e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris miscmp_len = MISCMP_MAX_LENGTH; 433e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris } else { 434e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris miscmp_len = pagesize; 435e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris } 436e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris for (size_t i = 1; i < miscmp_len; i++) { 437e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris uint8_t* buf1 = &memory1[pagesize-i]; 438e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris for (size_t j = 1; j < miscmp_len; j++) { 439e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris if (j == i) 440e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris continue; 441e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 442e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris uint8_t* buf2 = &memory2[pagesize-j]; 443e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 444e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris test_miscmp_func(buf1, buf2, i, j); 445e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris } 446e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris } 447e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris 448e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris ASSERT_TRUE(mprotect(&memory1[pagesize], pagesize, PROT_READ | PROT_WRITE) == 0); 449e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris ASSERT_TRUE(mprotect(&memory2[pagesize], pagesize, PROT_READ | PROT_WRITE) == 0); 450e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris free(memory1); 451e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris free(memory2); 452e5bbb6b6ab662503f06ceb20fa841d2e558d596dChristopher Ferris} 453