Brian Carlstrom | 9004cb6 | 2013-07-26 15:48:31 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "mem_map.h" |
| 18 | |
Andreas Gampe | d490129 | 2017-05-30 18:41:34 -0700 | [diff] [blame] | 19 | #include <sys/mman.h> |
| 20 | |
Ian Rogers | 700a402 | 2014-05-19 16:49:03 -0700 | [diff] [blame] | 21 | #include <memory> |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 22 | #include <random> |
Ian Rogers | 700a402 | 2014-05-19 16:49:03 -0700 | [diff] [blame] | 23 | |
Andreas Gampe | c857f4a | 2018-10-25 13:12:37 -0700 | [diff] [blame] | 24 | #include "common_art_test.h" |
David Sehr | d5f8de8 | 2018-04-27 14:12:03 -0700 | [diff] [blame] | 25 | #include "common_runtime_test.h" // For TEST_DISABLED_FOR_MIPS |
Andreas Gampe | c857f4a | 2018-10-25 13:12:37 -0700 | [diff] [blame] | 26 | #include "logging.h" |
David Sehr | 1979c64 | 2018-04-26 14:41:18 -0700 | [diff] [blame] | 27 | #include "memory_tool.h" |
| 28 | #include "unix_file/fd_file.h" |
Brian Carlstrom | 9004cb6 | 2013-07-26 15:48:31 -0700 | [diff] [blame] | 29 | |
| 30 | namespace art { |
| 31 | |
David Sehr | d5f8de8 | 2018-04-27 14:12:03 -0700 | [diff] [blame] | 32 | class MemMapTest : public CommonArtTest { |
Hiroshi Yamauchi | fd7e7f1 | 2013-10-22 14:17:48 -0700 | [diff] [blame] | 33 | public: |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 34 | static bool IsAddressMapped(void* addr) { |
| 35 | bool res = msync(addr, 1, MS_SYNC) == 0; |
| 36 | if (!res && errno != ENOMEM) { |
| 37 | PLOG(FATAL) << "Unexpected error occurred on msync"; |
| 38 | } |
| 39 | return res; |
| 40 | } |
| 41 | |
| 42 | static std::vector<uint8_t> RandomData(size_t size) { |
| 43 | std::random_device rd; |
| 44 | std::uniform_int_distribution<uint8_t> dist; |
| 45 | std::vector<uint8_t> res; |
| 46 | res.resize(size); |
| 47 | for (size_t i = 0; i < size; i++) { |
| 48 | res[i] = dist(rd); |
| 49 | } |
| 50 | return res; |
| 51 | } |
| 52 | |
Mathieu Chartier | 16d29f8 | 2015-11-10 10:32:52 -0800 | [diff] [blame] | 53 | static uint8_t* GetValidMapAddress(size_t size, bool low_4gb) { |
| 54 | // Find a valid map address and unmap it before returning. |
| 55 | std::string error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 56 | MemMap map = MemMap::MapAnonymous("temp", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 57 | size, |
| 58 | PROT_READ, |
| 59 | low_4gb, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 60 | &error_msg); |
| 61 | CHECK(map.IsValid()); |
| 62 | return map.Begin(); |
Mathieu Chartier | 16d29f8 | 2015-11-10 10:32:52 -0800 | [diff] [blame] | 63 | } |
| 64 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 65 | static void RemapAtEndTest(bool low_4gb) { |
| 66 | std::string error_msg; |
| 67 | // Cast the page size to size_t. |
| 68 | const size_t page_size = static_cast<size_t>(kPageSize); |
| 69 | // Map a two-page memory region. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 70 | MemMap m0 = MemMap::MapAnonymous("MemMapTest_RemapAtEndTest_map0", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 71 | 2 * page_size, |
| 72 | PROT_READ | PROT_WRITE, |
| 73 | low_4gb, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 74 | &error_msg); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 75 | // Check its state and write to it. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 76 | ASSERT_TRUE(m0.IsValid()); |
| 77 | uint8_t* base0 = m0.Begin(); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 78 | ASSERT_TRUE(base0 != nullptr) << error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 79 | size_t size0 = m0.Size(); |
| 80 | EXPECT_EQ(m0.Size(), 2 * page_size); |
| 81 | EXPECT_EQ(m0.BaseBegin(), base0); |
| 82 | EXPECT_EQ(m0.BaseSize(), size0); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 83 | memset(base0, 42, 2 * page_size); |
| 84 | // Remap the latter half into a second MemMap. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 85 | MemMap m1 = m0.RemapAtEnd(base0 + page_size, |
| 86 | "MemMapTest_RemapAtEndTest_map1", |
| 87 | PROT_READ | PROT_WRITE, |
| 88 | &error_msg); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 89 | // Check the states of the two maps. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 90 | EXPECT_EQ(m0.Begin(), base0) << error_msg; |
| 91 | EXPECT_EQ(m0.Size(), page_size); |
| 92 | EXPECT_EQ(m0.BaseBegin(), base0); |
| 93 | EXPECT_EQ(m0.BaseSize(), page_size); |
| 94 | uint8_t* base1 = m1.Begin(); |
| 95 | size_t size1 = m1.Size(); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 96 | EXPECT_EQ(base1, base0 + page_size); |
| 97 | EXPECT_EQ(size1, page_size); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 98 | EXPECT_EQ(m1.BaseBegin(), base1); |
| 99 | EXPECT_EQ(m1.BaseSize(), size1); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 100 | // Write to the second region. |
| 101 | memset(base1, 43, page_size); |
| 102 | // Check the contents of the two regions. |
| 103 | for (size_t i = 0; i < page_size; ++i) { |
| 104 | EXPECT_EQ(base0[i], 42); |
| 105 | } |
| 106 | for (size_t i = 0; i < page_size; ++i) { |
| 107 | EXPECT_EQ(base1[i], 43); |
| 108 | } |
| 109 | // Unmap the first region. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 110 | m0.Reset(); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 111 | // Make sure the second region is still accessible after the first |
| 112 | // region is unmapped. |
| 113 | for (size_t i = 0; i < page_size; ++i) { |
| 114 | EXPECT_EQ(base1[i], 43); |
| 115 | } |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 116 | MemMap m2 = m1.RemapAtEnd(m1.Begin(), |
| 117 | "MemMapTest_RemapAtEndTest_map1", |
| 118 | PROT_READ | PROT_WRITE, |
| 119 | &error_msg); |
| 120 | ASSERT_TRUE(m2.IsValid()) << error_msg; |
| 121 | ASSERT_FALSE(m1.IsValid()); |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 122 | } |
Andreas Gampe | d8f26db | 2014-05-19 17:01:13 -0700 | [diff] [blame] | 123 | |
Mathieu Chartier | 6e88ef6 | 2014-10-14 15:01:24 -0700 | [diff] [blame] | 124 | void CommonInit() { |
| 125 | MemMap::Init(); |
| 126 | } |
| 127 | |
Andreas Gampe | d8f26db | 2014-05-19 17:01:13 -0700 | [diff] [blame] | 128 | #if defined(__LP64__) && !defined(__x86_64__) |
| 129 | static uintptr_t GetLinearScanPos() { |
| 130 | return MemMap::next_mem_pos_; |
| 131 | } |
| 132 | #endif |
Hiroshi Yamauchi | fd7e7f1 | 2013-10-22 14:17:48 -0700 | [diff] [blame] | 133 | }; |
Brian Carlstrom | 9004cb6 | 2013-07-26 15:48:31 -0700 | [diff] [blame] | 134 | |
Andreas Gampe | d8f26db | 2014-05-19 17:01:13 -0700 | [diff] [blame] | 135 | #if defined(__LP64__) && !defined(__x86_64__) |
| 136 | |
| 137 | #ifdef __BIONIC__ |
| 138 | extern uintptr_t CreateStartPos(uint64_t input); |
| 139 | #endif |
| 140 | |
| 141 | TEST_F(MemMapTest, Start) { |
Mathieu Chartier | 6e88ef6 | 2014-10-14 15:01:24 -0700 | [diff] [blame] | 142 | CommonInit(); |
Andreas Gampe | d8f26db | 2014-05-19 17:01:13 -0700 | [diff] [blame] | 143 | uintptr_t start = GetLinearScanPos(); |
| 144 | EXPECT_LE(64 * KB, start); |
| 145 | EXPECT_LT(start, static_cast<uintptr_t>(ART_BASE_ADDRESS)); |
Andreas Gampe | d8f26db | 2014-05-19 17:01:13 -0700 | [diff] [blame] | 146 | #ifdef __BIONIC__ |
| 147 | // Test a couple of values. Make sure they are different. |
| 148 | uintptr_t last = 0; |
| 149 | for (size_t i = 0; i < 100; ++i) { |
| 150 | uintptr_t random_start = CreateStartPos(i * kPageSize); |
| 151 | EXPECT_NE(last, random_start); |
| 152 | last = random_start; |
| 153 | } |
| 154 | |
| 155 | // Even on max, should be below ART_BASE_ADDRESS. |
| 156 | EXPECT_LT(CreateStartPos(~0), static_cast<uintptr_t>(ART_BASE_ADDRESS)); |
| 157 | #endif |
| 158 | // End of test. |
| 159 | } |
| 160 | #endif |
| 161 | |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 162 | // We need mremap to be able to test ReplaceMapping at all |
| 163 | #if HAVE_MREMAP_SYSCALL |
| 164 | TEST_F(MemMapTest, ReplaceMapping_SameSize) { |
| 165 | std::string error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 166 | MemMap dest = MemMap::MapAnonymous("MapAnonymousEmpty-atomic-replace-dest", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 167 | kPageSize, |
| 168 | PROT_READ, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 169 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 170 | &error_msg); |
| 171 | ASSERT_TRUE(dest.IsValid()); |
| 172 | MemMap source = MemMap::MapAnonymous("MapAnonymous-atomic-replace-source", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 173 | kPageSize, |
| 174 | PROT_WRITE | PROT_READ, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 175 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 176 | &error_msg); |
| 177 | ASSERT_TRUE(source.IsValid()); |
| 178 | void* source_addr = source.Begin(); |
| 179 | void* dest_addr = dest.Begin(); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 180 | ASSERT_TRUE(IsAddressMapped(source_addr)); |
| 181 | ASSERT_TRUE(IsAddressMapped(dest_addr)); |
| 182 | |
| 183 | std::vector<uint8_t> data = RandomData(kPageSize); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 184 | memcpy(source.Begin(), data.data(), data.size()); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 185 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 186 | ASSERT_TRUE(dest.ReplaceWith(&source, &error_msg)) << error_msg; |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 187 | |
| 188 | ASSERT_FALSE(IsAddressMapped(source_addr)); |
| 189 | ASSERT_TRUE(IsAddressMapped(dest_addr)); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 190 | ASSERT_FALSE(source.IsValid()); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 191 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 192 | ASSERT_EQ(dest.Size(), static_cast<size_t>(kPageSize)); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 193 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 194 | ASSERT_EQ(memcmp(dest.Begin(), data.data(), dest.Size()), 0); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | TEST_F(MemMapTest, ReplaceMapping_MakeLarger) { |
| 198 | std::string error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 199 | MemMap dest = MemMap::MapAnonymous("MapAnonymousEmpty-atomic-replace-dest", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 200 | 5 * kPageSize, // Need to make it larger |
| 201 | // initially so we know |
| 202 | // there won't be mappings |
Vladimir Marko | 830f356 | 2018-10-31 12:58:44 +0000 | [diff] [blame] | 203 | // in the way when we move |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 204 | // source. |
| 205 | PROT_READ, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 206 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 207 | &error_msg); |
| 208 | ASSERT_TRUE(dest.IsValid()); |
| 209 | MemMap source = MemMap::MapAnonymous("MapAnonymous-atomic-replace-source", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 210 | 3 * kPageSize, |
| 211 | PROT_WRITE | PROT_READ, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 212 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 213 | &error_msg); |
| 214 | ASSERT_TRUE(source.IsValid()); |
| 215 | uint8_t* source_addr = source.Begin(); |
| 216 | uint8_t* dest_addr = dest.Begin(); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 217 | ASSERT_TRUE(IsAddressMapped(source_addr)); |
| 218 | |
| 219 | // Fill the source with random data. |
| 220 | std::vector<uint8_t> data = RandomData(3 * kPageSize); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 221 | memcpy(source.Begin(), data.data(), data.size()); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 222 | |
| 223 | // Make the dest smaller so that we know we'll have space. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 224 | dest.SetSize(kPageSize); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 225 | |
| 226 | ASSERT_TRUE(IsAddressMapped(dest_addr)); |
| 227 | ASSERT_FALSE(IsAddressMapped(dest_addr + 2 * kPageSize)); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 228 | ASSERT_EQ(dest.Size(), static_cast<size_t>(kPageSize)); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 229 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 230 | ASSERT_TRUE(dest.ReplaceWith(&source, &error_msg)) << error_msg; |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 231 | |
| 232 | ASSERT_FALSE(IsAddressMapped(source_addr)); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 233 | ASSERT_EQ(dest.Size(), static_cast<size_t>(3 * kPageSize)); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 234 | ASSERT_TRUE(IsAddressMapped(dest_addr)); |
| 235 | ASSERT_TRUE(IsAddressMapped(dest_addr + 2 * kPageSize)); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 236 | ASSERT_FALSE(source.IsValid()); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 237 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 238 | ASSERT_EQ(memcmp(dest.Begin(), data.data(), dest.Size()), 0); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | TEST_F(MemMapTest, ReplaceMapping_MakeSmaller) { |
| 242 | std::string error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 243 | MemMap dest = MemMap::MapAnonymous("MapAnonymousEmpty-atomic-replace-dest", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 244 | 3 * kPageSize, |
| 245 | PROT_READ, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 246 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 247 | &error_msg); |
| 248 | ASSERT_TRUE(dest.IsValid()); |
| 249 | MemMap source = MemMap::MapAnonymous("MapAnonymous-atomic-replace-source", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 250 | kPageSize, |
| 251 | PROT_WRITE | PROT_READ, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 252 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 253 | &error_msg); |
| 254 | ASSERT_TRUE(source.IsValid()); |
| 255 | uint8_t* source_addr = source.Begin(); |
| 256 | uint8_t* dest_addr = dest.Begin(); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 257 | ASSERT_TRUE(IsAddressMapped(source_addr)); |
| 258 | ASSERT_TRUE(IsAddressMapped(dest_addr)); |
| 259 | ASSERT_TRUE(IsAddressMapped(dest_addr + 2 * kPageSize)); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 260 | ASSERT_EQ(dest.Size(), static_cast<size_t>(3 * kPageSize)); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 261 | |
| 262 | std::vector<uint8_t> data = RandomData(kPageSize); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 263 | memcpy(source.Begin(), data.data(), kPageSize); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 264 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 265 | ASSERT_TRUE(dest.ReplaceWith(&source, &error_msg)) << error_msg; |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 266 | |
| 267 | ASSERT_FALSE(IsAddressMapped(source_addr)); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 268 | ASSERT_EQ(dest.Size(), static_cast<size_t>(kPageSize)); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 269 | ASSERT_TRUE(IsAddressMapped(dest_addr)); |
| 270 | ASSERT_FALSE(IsAddressMapped(dest_addr + 2 * kPageSize)); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 271 | ASSERT_FALSE(source.IsValid()); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 272 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 273 | ASSERT_EQ(memcmp(dest.Begin(), data.data(), dest.Size()), 0); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | TEST_F(MemMapTest, ReplaceMapping_FailureOverlap) { |
| 277 | std::string error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 278 | MemMap dest = |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 279 | MemMap::MapAnonymous( |
| 280 | "MapAnonymousEmpty-atomic-replace-dest", |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 281 | 3 * kPageSize, // Need to make it larger initially so we know there won't be mappings in |
Vladimir Marko | 830f356 | 2018-10-31 12:58:44 +0000 | [diff] [blame] | 282 | // the way when we move source. |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 283 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 284 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 285 | &error_msg); |
| 286 | ASSERT_TRUE(dest.IsValid()); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 287 | // Resize down to 1 page so we can remap the rest. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 288 | dest.SetSize(kPageSize); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 289 | // Create source from the last 2 pages |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 290 | MemMap source = MemMap::MapAnonymous("MapAnonymous-atomic-replace-source", |
| 291 | dest.Begin() + kPageSize, |
| 292 | 2 * kPageSize, |
| 293 | PROT_WRITE | PROT_READ, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 294 | /*low_4gb=*/ false, |
| 295 | /*reuse=*/ false, |
| 296 | /*reservation=*/ nullptr, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 297 | &error_msg); |
| 298 | ASSERT_TRUE(source.IsValid()); |
| 299 | ASSERT_EQ(dest.Begin() + kPageSize, source.Begin()); |
| 300 | uint8_t* source_addr = source.Begin(); |
| 301 | uint8_t* dest_addr = dest.Begin(); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 302 | ASSERT_TRUE(IsAddressMapped(source_addr)); |
| 303 | |
| 304 | // Fill the source and dest with random data. |
| 305 | std::vector<uint8_t> data = RandomData(2 * kPageSize); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 306 | memcpy(source.Begin(), data.data(), data.size()); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 307 | std::vector<uint8_t> dest_data = RandomData(kPageSize); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 308 | memcpy(dest.Begin(), dest_data.data(), dest_data.size()); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 309 | |
| 310 | ASSERT_TRUE(IsAddressMapped(dest_addr)); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 311 | ASSERT_EQ(dest.Size(), static_cast<size_t>(kPageSize)); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 312 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 313 | ASSERT_FALSE(dest.ReplaceWith(&source, &error_msg)) << error_msg; |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 314 | |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 315 | ASSERT_TRUE(IsAddressMapped(source_addr)); |
| 316 | ASSERT_TRUE(IsAddressMapped(dest_addr)); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 317 | ASSERT_EQ(source.Size(), data.size()); |
| 318 | ASSERT_EQ(dest.Size(), dest_data.size()); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 319 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 320 | ASSERT_EQ(memcmp(source.Begin(), data.data(), data.size()), 0); |
| 321 | ASSERT_EQ(memcmp(dest.Begin(), dest_data.data(), dest_data.size()), 0); |
Alex Light | ca97ada | 2018-02-02 09:25:31 -0800 | [diff] [blame] | 322 | } |
| 323 | #endif // HAVE_MREMAP_SYSCALL |
| 324 | |
Brian Carlstrom | 9004cb6 | 2013-07-26 15:48:31 -0700 | [diff] [blame] | 325 | TEST_F(MemMapTest, MapAnonymousEmpty) { |
Mathieu Chartier | 6e88ef6 | 2014-10-14 15:01:24 -0700 | [diff] [blame] | 326 | CommonInit(); |
Ian Rogers | 8d31bbd | 2013-10-13 10:44:14 -0700 | [diff] [blame] | 327 | std::string error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 328 | MemMap map = MemMap::MapAnonymous("MapAnonymousEmpty", |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 329 | /*byte_count=*/ 0, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 330 | PROT_READ, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 331 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 332 | &error_msg); |
| 333 | ASSERT_FALSE(map.IsValid()) << error_msg; |
| 334 | ASSERT_FALSE(error_msg.empty()); |
| 335 | |
| 336 | error_msg.clear(); |
| 337 | map = MemMap::MapAnonymous("MapAnonymousNonEmpty", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 338 | kPageSize, |
| 339 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 340 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 341 | &error_msg); |
| 342 | ASSERT_TRUE(map.IsValid()) << error_msg; |
Ian Rogers | 8d31bbd | 2013-10-13 10:44:14 -0700 | [diff] [blame] | 343 | ASSERT_TRUE(error_msg.empty()); |
Brian Carlstrom | 9004cb6 | 2013-07-26 15:48:31 -0700 | [diff] [blame] | 344 | } |
| 345 | |
Mathieu Chartier | 486932a | 2016-02-24 10:09:23 -0800 | [diff] [blame] | 346 | TEST_F(MemMapTest, MapAnonymousFailNullError) { |
| 347 | CommonInit(); |
| 348 | // Test that we don't crash with a null error_str when mapping at an invalid location. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 349 | MemMap map = MemMap::MapAnonymous("MapAnonymousInvalid", |
| 350 | reinterpret_cast<uint8_t*>(kPageSize), |
| 351 | 0x20000, |
| 352 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 353 | /*low_4gb=*/ false, |
| 354 | /*reuse=*/ false, |
| 355 | /*reservation=*/ nullptr, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 356 | nullptr); |
| 357 | ASSERT_FALSE(map.IsValid()); |
Mathieu Chartier | 486932a | 2016-02-24 10:09:23 -0800 | [diff] [blame] | 358 | } |
| 359 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 360 | #ifdef __LP64__ |
| 361 | TEST_F(MemMapTest, MapAnonymousEmpty32bit) { |
Mathieu Chartier | 6e88ef6 | 2014-10-14 15:01:24 -0700 | [diff] [blame] | 362 | CommonInit(); |
Hiroshi Yamauchi | fd7e7f1 | 2013-10-22 14:17:48 -0700 | [diff] [blame] | 363 | std::string error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 364 | MemMap map = MemMap::MapAnonymous("MapAnonymousEmpty", |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 365 | /*byte_count=*/ 0, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 366 | PROT_READ, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 367 | /*low_4gb=*/ true, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 368 | &error_msg); |
| 369 | ASSERT_FALSE(map.IsValid()) << error_msg; |
| 370 | ASSERT_FALSE(error_msg.empty()); |
| 371 | |
| 372 | error_msg.clear(); |
| 373 | map = MemMap::MapAnonymous("MapAnonymousNonEmpty", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 374 | kPageSize, |
| 375 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 376 | /*low_4gb=*/ true, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 377 | &error_msg); |
| 378 | ASSERT_TRUE(map.IsValid()) << error_msg; |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 379 | ASSERT_TRUE(error_msg.empty()); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 380 | ASSERT_LT(reinterpret_cast<uintptr_t>(map.BaseBegin()), 1ULL << 32); |
Hiroshi Yamauchi | fd7e7f1 | 2013-10-22 14:17:48 -0700 | [diff] [blame] | 381 | } |
Mathieu Chartier | 42bddce | 2015-11-09 15:16:56 -0800 | [diff] [blame] | 382 | TEST_F(MemMapTest, MapFile32Bit) { |
| 383 | CommonInit(); |
| 384 | std::string error_msg; |
| 385 | ScratchFile scratch_file; |
| 386 | constexpr size_t kMapSize = kPageSize; |
| 387 | std::unique_ptr<uint8_t[]> data(new uint8_t[kMapSize]()); |
| 388 | ASSERT_TRUE(scratch_file.GetFile()->WriteFully(&data[0], kMapSize)); |
Andreas Gampe | 0de385f | 2018-10-11 11:11:13 -0700 | [diff] [blame] | 389 | MemMap map = MemMap::MapFile(/*byte_count=*/kMapSize, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 390 | PROT_READ, |
| 391 | MAP_PRIVATE, |
| 392 | scratch_file.GetFd(), |
Andreas Gampe | 0de385f | 2018-10-11 11:11:13 -0700 | [diff] [blame] | 393 | /*start=*/0, |
| 394 | /*low_4gb=*/true, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 395 | scratch_file.GetFilename().c_str(), |
| 396 | &error_msg); |
| 397 | ASSERT_TRUE(map.IsValid()) << error_msg; |
Mathieu Chartier | 42bddce | 2015-11-09 15:16:56 -0800 | [diff] [blame] | 398 | ASSERT_TRUE(error_msg.empty()); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 399 | ASSERT_EQ(map.Size(), kMapSize); |
| 400 | ASSERT_LT(reinterpret_cast<uintptr_t>(map.BaseBegin()), 1ULL << 32); |
Mathieu Chartier | 42bddce | 2015-11-09 15:16:56 -0800 | [diff] [blame] | 401 | } |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 402 | #endif |
| 403 | |
Hiroshi Yamauchi | 4fb5df8 | 2014-03-13 15:10:27 -0700 | [diff] [blame] | 404 | TEST_F(MemMapTest, MapAnonymousExactAddr) { |
Vladimir Marko | 1c1442a | 2018-10-26 13:39:14 +0100 | [diff] [blame] | 405 | // TODO: The semantics of the MemMap::MapAnonymous() with a given address but without |
| 406 | // `reuse == true` or `reservation != nullptr` is weird. We should either drop support |
| 407 | // for it, or take it only as a hint and allow the result to be mapped elsewhere. |
| 408 | // Currently we're seeing failures with ASAN. b/118408378 |
| 409 | TEST_DISABLED_FOR_MEMORY_TOOL(); |
| 410 | |
Mathieu Chartier | 6e88ef6 | 2014-10-14 15:01:24 -0700 | [diff] [blame] | 411 | CommonInit(); |
Hiroshi Yamauchi | 4fb5df8 | 2014-03-13 15:10:27 -0700 | [diff] [blame] | 412 | std::string error_msg; |
Mathieu Chartier | 16d29f8 | 2015-11-10 10:32:52 -0800 | [diff] [blame] | 413 | // Find a valid address. |
Andreas Gampe | 0de385f | 2018-10-11 11:11:13 -0700 | [diff] [blame] | 414 | uint8_t* valid_address = GetValidMapAddress(kPageSize, /*low_4gb=*/false); |
Hiroshi Yamauchi | 4fb5df8 | 2014-03-13 15:10:27 -0700 | [diff] [blame] | 415 | // Map at an address that should work, which should succeed. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 416 | MemMap map0 = MemMap::MapAnonymous("MapAnonymous0", |
| 417 | valid_address, |
| 418 | kPageSize, |
| 419 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 420 | /*low_4gb=*/ false, |
| 421 | /*reuse=*/ false, |
| 422 | /*reservation=*/ nullptr, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 423 | &error_msg); |
| 424 | ASSERT_TRUE(map0.IsValid()) << error_msg; |
Hiroshi Yamauchi | 4fb5df8 | 2014-03-13 15:10:27 -0700 | [diff] [blame] | 425 | ASSERT_TRUE(error_msg.empty()); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 426 | ASSERT_TRUE(map0.BaseBegin() == valid_address); |
Hiroshi Yamauchi | 4fb5df8 | 2014-03-13 15:10:27 -0700 | [diff] [blame] | 427 | // Map at an unspecified address, which should succeed. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 428 | MemMap map1 = MemMap::MapAnonymous("MapAnonymous1", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 429 | kPageSize, |
| 430 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 431 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 432 | &error_msg); |
| 433 | ASSERT_TRUE(map1.IsValid()) << error_msg; |
Hiroshi Yamauchi | 4fb5df8 | 2014-03-13 15:10:27 -0700 | [diff] [blame] | 434 | ASSERT_TRUE(error_msg.empty()); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 435 | ASSERT_TRUE(map1.BaseBegin() != nullptr); |
Hiroshi Yamauchi | 4fb5df8 | 2014-03-13 15:10:27 -0700 | [diff] [blame] | 436 | // Attempt to map at the same address, which should fail. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 437 | MemMap map2 = MemMap::MapAnonymous("MapAnonymous2", |
| 438 | reinterpret_cast<uint8_t*>(map1.BaseBegin()), |
| 439 | kPageSize, |
| 440 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 441 | /*low_4gb=*/ false, |
| 442 | /*reuse=*/ false, |
| 443 | /*reservation=*/ nullptr, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 444 | &error_msg); |
| 445 | ASSERT_FALSE(map2.IsValid()) << error_msg; |
Hiroshi Yamauchi | 4fb5df8 | 2014-03-13 15:10:27 -0700 | [diff] [blame] | 446 | ASSERT_TRUE(!error_msg.empty()); |
| 447 | } |
| 448 | |
Ian Rogers | ef7d42f | 2014-01-06 12:55:46 -0800 | [diff] [blame] | 449 | TEST_F(MemMapTest, RemapAtEnd) { |
| 450 | RemapAtEndTest(false); |
| 451 | } |
| 452 | |
| 453 | #ifdef __LP64__ |
| 454 | TEST_F(MemMapTest, RemapAtEnd32bit) { |
| 455 | RemapAtEndTest(true); |
| 456 | } |
| 457 | #endif |
Hiroshi Yamauchi | fd7e7f1 | 2013-10-22 14:17:48 -0700 | [diff] [blame] | 458 | |
Orion Hodson | 1d3fd08 | 2018-09-28 09:38:35 +0100 | [diff] [blame] | 459 | TEST_F(MemMapTest, RemapFileViewAtEnd) { |
| 460 | CommonInit(); |
| 461 | std::string error_msg; |
| 462 | ScratchFile scratch_file; |
| 463 | |
| 464 | // Create a scratch file 3 pages large. |
| 465 | constexpr size_t kMapSize = 3 * kPageSize; |
| 466 | std::unique_ptr<uint8_t[]> data(new uint8_t[kMapSize]()); |
| 467 | memset(data.get(), 1, kPageSize); |
| 468 | memset(&data[0], 0x55, kPageSize); |
| 469 | memset(&data[kPageSize], 0x5a, kPageSize); |
| 470 | memset(&data[2 * kPageSize], 0xaa, kPageSize); |
| 471 | ASSERT_TRUE(scratch_file.GetFile()->WriteFully(&data[0], kMapSize)); |
| 472 | |
Andreas Gampe | 0de385f | 2018-10-11 11:11:13 -0700 | [diff] [blame] | 473 | MemMap map = MemMap::MapFile(/*byte_count=*/kMapSize, |
Orion Hodson | 1d3fd08 | 2018-09-28 09:38:35 +0100 | [diff] [blame] | 474 | PROT_READ, |
| 475 | MAP_PRIVATE, |
| 476 | scratch_file.GetFd(), |
Andreas Gampe | 0de385f | 2018-10-11 11:11:13 -0700 | [diff] [blame] | 477 | /*start=*/0, |
| 478 | /*low_4gb=*/true, |
Orion Hodson | 1d3fd08 | 2018-09-28 09:38:35 +0100 | [diff] [blame] | 479 | scratch_file.GetFilename().c_str(), |
| 480 | &error_msg); |
| 481 | ASSERT_TRUE(map.IsValid()) << error_msg; |
| 482 | ASSERT_TRUE(error_msg.empty()); |
| 483 | ASSERT_EQ(map.Size(), kMapSize); |
| 484 | ASSERT_LT(reinterpret_cast<uintptr_t>(map.BaseBegin()), 1ULL << 32); |
| 485 | ASSERT_EQ(data[0], *map.Begin()); |
| 486 | ASSERT_EQ(data[kPageSize], *(map.Begin() + kPageSize)); |
| 487 | ASSERT_EQ(data[2 * kPageSize], *(map.Begin() + 2 * kPageSize)); |
| 488 | |
| 489 | for (size_t offset = 2 * kPageSize; offset > 0; offset -= kPageSize) { |
| 490 | MemMap tail = map.RemapAtEnd(map.Begin() + offset, |
| 491 | "bad_offset_map", |
| 492 | PROT_READ, |
| 493 | MAP_PRIVATE | MAP_FIXED, |
| 494 | scratch_file.GetFd(), |
| 495 | offset, |
| 496 | &error_msg); |
| 497 | ASSERT_TRUE(tail.IsValid()) << error_msg; |
| 498 | ASSERT_TRUE(error_msg.empty()); |
| 499 | ASSERT_EQ(offset, map.Size()); |
| 500 | ASSERT_EQ(static_cast<size_t>(kPageSize), tail.Size()); |
| 501 | ASSERT_EQ(tail.Begin(), map.Begin() + map.Size()); |
| 502 | ASSERT_EQ(data[offset], *tail.Begin()); |
| 503 | } |
| 504 | } |
| 505 | |
Qiming Shi | 84d49cc | 2014-04-24 15:38:41 +0800 | [diff] [blame] | 506 | TEST_F(MemMapTest, MapAnonymousExactAddr32bitHighAddr) { |
Roland Levillain | 14306b8 | 2016-01-20 12:13:57 +0000 | [diff] [blame] | 507 | // Some MIPS32 hardware (namely the Creator Ci20 development board) |
| 508 | // cannot allocate in the 2GB-4GB region. |
| 509 | TEST_DISABLED_FOR_MIPS(); |
| 510 | |
Roland Levillain | 0b0d3b4 | 2018-06-14 13:55:49 +0100 | [diff] [blame] | 511 | // This test does not work under AddressSanitizer. |
| 512 | // Historical note: This test did not work under Valgrind either. |
Roland Levillain | 05e34f4 | 2018-05-24 13:19:05 +0000 | [diff] [blame] | 513 | TEST_DISABLED_FOR_MEMORY_TOOL(); |
| 514 | |
Mathieu Chartier | 6e88ef6 | 2014-10-14 15:01:24 -0700 | [diff] [blame] | 515 | CommonInit(); |
Roland Levillain | 05e34f4 | 2018-05-24 13:19:05 +0000 | [diff] [blame] | 516 | constexpr size_t size = 0x100000; |
| 517 | // Try all addresses starting from 2GB to 4GB. |
| 518 | size_t start_addr = 2 * GB; |
| 519 | std::string error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 520 | MemMap map; |
Roland Levillain | 05e34f4 | 2018-05-24 13:19:05 +0000 | [diff] [blame] | 521 | for (; start_addr <= std::numeric_limits<uint32_t>::max() - size; start_addr += size) { |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 522 | map = MemMap::MapAnonymous("MapAnonymousExactAddr32bitHighAddr", |
| 523 | reinterpret_cast<uint8_t*>(start_addr), |
| 524 | size, |
| 525 | PROT_READ | PROT_WRITE, |
Andreas Gampe | 0de385f | 2018-10-11 11:11:13 -0700 | [diff] [blame] | 526 | /*low_4gb=*/ true, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 527 | /*reuse=*/ false, |
| 528 | /*reservation=*/ nullptr, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 529 | &error_msg); |
| 530 | if (map.IsValid()) { |
Roland Levillain | 05e34f4 | 2018-05-24 13:19:05 +0000 | [diff] [blame] | 531 | break; |
Mathieu Chartier | 16d29f8 | 2015-11-10 10:32:52 -0800 | [diff] [blame] | 532 | } |
Andreas Gampe | 928f72b | 2014-09-09 19:53:48 -0700 | [diff] [blame] | 533 | } |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 534 | ASSERT_TRUE(map.IsValid()) << error_msg; |
| 535 | ASSERT_GE(reinterpret_cast<uintptr_t>(map.End()), 2u * GB); |
Roland Levillain | 05e34f4 | 2018-05-24 13:19:05 +0000 | [diff] [blame] | 536 | ASSERT_TRUE(error_msg.empty()); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 537 | ASSERT_EQ(map.BaseBegin(), reinterpret_cast<void*>(start_addr)); |
Qiming Shi | 84d49cc | 2014-04-24 15:38:41 +0800 | [diff] [blame] | 538 | } |
| 539 | |
| 540 | TEST_F(MemMapTest, MapAnonymousOverflow) { |
Mathieu Chartier | 6e88ef6 | 2014-10-14 15:01:24 -0700 | [diff] [blame] | 541 | CommonInit(); |
Qiming Shi | 84d49cc | 2014-04-24 15:38:41 +0800 | [diff] [blame] | 542 | std::string error_msg; |
| 543 | uintptr_t ptr = 0; |
| 544 | ptr -= kPageSize; // Now it's close to the top. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 545 | MemMap map = MemMap::MapAnonymous("MapAnonymousOverflow", |
| 546 | reinterpret_cast<uint8_t*>(ptr), |
| 547 | 2 * kPageSize, // brings it over the top. |
| 548 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 549 | /*low_4gb=*/ false, |
| 550 | /*reuse=*/ false, |
| 551 | /*reservation=*/ nullptr, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 552 | &error_msg); |
| 553 | ASSERT_FALSE(map.IsValid()); |
Qiming Shi | 84d49cc | 2014-04-24 15:38:41 +0800 | [diff] [blame] | 554 | ASSERT_FALSE(error_msg.empty()); |
| 555 | } |
| 556 | |
| 557 | #ifdef __LP64__ |
| 558 | TEST_F(MemMapTest, MapAnonymousLow4GBExpectedTooHigh) { |
Mathieu Chartier | 6e88ef6 | 2014-10-14 15:01:24 -0700 | [diff] [blame] | 559 | CommonInit(); |
Qiming Shi | 84d49cc | 2014-04-24 15:38:41 +0800 | [diff] [blame] | 560 | std::string error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 561 | MemMap map = |
Vladimir Marko | 5c42c29 | 2015-02-25 12:02:49 +0000 | [diff] [blame] | 562 | MemMap::MapAnonymous("MapAnonymousLow4GBExpectedTooHigh", |
| 563 | reinterpret_cast<uint8_t*>(UINT64_C(0x100000000)), |
| 564 | kPageSize, |
| 565 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 566 | /*low_4gb=*/ true, |
| 567 | /*reuse=*/ false, |
| 568 | /*reservation=*/ nullptr, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 569 | &error_msg); |
| 570 | ASSERT_FALSE(map.IsValid()); |
Qiming Shi | 84d49cc | 2014-04-24 15:38:41 +0800 | [diff] [blame] | 571 | ASSERT_FALSE(error_msg.empty()); |
| 572 | } |
| 573 | |
| 574 | TEST_F(MemMapTest, MapAnonymousLow4GBRangeTooHigh) { |
Mathieu Chartier | 6e88ef6 | 2014-10-14 15:01:24 -0700 | [diff] [blame] | 575 | CommonInit(); |
Qiming Shi | 84d49cc | 2014-04-24 15:38:41 +0800 | [diff] [blame] | 576 | std::string error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 577 | MemMap map = MemMap::MapAnonymous("MapAnonymousLow4GBRangeTooHigh", |
Vladimir Marko | 830f356 | 2018-10-31 12:58:44 +0000 | [diff] [blame] | 578 | /*addr=*/ reinterpret_cast<uint8_t*>(0xF0000000), |
| 579 | /*byte_count=*/ 0x20000000, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 580 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 581 | /*low_4gb=*/ true, |
| 582 | /*reuse=*/ false, |
| 583 | /*reservation=*/ nullptr, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 584 | &error_msg); |
| 585 | ASSERT_FALSE(map.IsValid()); |
Qiming Shi | 84d49cc | 2014-04-24 15:38:41 +0800 | [diff] [blame] | 586 | ASSERT_FALSE(error_msg.empty()); |
| 587 | } |
| 588 | #endif |
| 589 | |
Vladimir Marko | 5c42c29 | 2015-02-25 12:02:49 +0000 | [diff] [blame] | 590 | TEST_F(MemMapTest, MapAnonymousReuse) { |
| 591 | CommonInit(); |
| 592 | std::string error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 593 | MemMap map = MemMap::MapAnonymous("MapAnonymousReserve", |
Vladimir Marko | 830f356 | 2018-10-31 12:58:44 +0000 | [diff] [blame] | 594 | /*byte_count=*/ 0x20000, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 595 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 596 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 597 | &error_msg); |
| 598 | ASSERT_TRUE(map.IsValid()); |
Vladimir Marko | 5c42c29 | 2015-02-25 12:02:49 +0000 | [diff] [blame] | 599 | ASSERT_TRUE(error_msg.empty()); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 600 | MemMap map2 = MemMap::MapAnonymous("MapAnonymousReused", |
Vladimir Marko | 830f356 | 2018-10-31 12:58:44 +0000 | [diff] [blame] | 601 | /*addr=*/ reinterpret_cast<uint8_t*>(map.BaseBegin()), |
| 602 | /*byte_count=*/ 0x10000, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 603 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 604 | /*low_4gb=*/ false, |
| 605 | /*reuse=*/ true, |
| 606 | /*reservation=*/ nullptr, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 607 | &error_msg); |
| 608 | ASSERT_TRUE(map2.IsValid()); |
Vladimir Marko | 5c42c29 | 2015-02-25 12:02:49 +0000 | [diff] [blame] | 609 | ASSERT_TRUE(error_msg.empty()); |
| 610 | } |
| 611 | |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 612 | TEST_F(MemMapTest, CheckNoGaps) { |
Mathieu Chartier | 6e88ef6 | 2014-10-14 15:01:24 -0700 | [diff] [blame] | 613 | CommonInit(); |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 614 | std::string error_msg; |
| 615 | constexpr size_t kNumPages = 3; |
| 616 | // Map a 3-page mem map. |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 617 | MemMap reservation = MemMap::MapAnonymous("MapAnonymous0", |
| 618 | kPageSize * kNumPages, |
| 619 | PROT_READ | PROT_WRITE, |
| 620 | /*low_4gb=*/ false, |
| 621 | &error_msg); |
| 622 | ASSERT_TRUE(reservation.IsValid()) << error_msg; |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 623 | ASSERT_TRUE(error_msg.empty()); |
| 624 | // Record the base address. |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 625 | uint8_t* map_base = reinterpret_cast<uint8_t*>(reservation.BaseBegin()); |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 626 | |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 627 | // Map at the same address, taking from the `map` reservation. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 628 | MemMap map0 = MemMap::MapAnonymous("MapAnonymous0", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 629 | kPageSize, |
| 630 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 631 | /*low_4gb=*/ false, |
| 632 | &reservation, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 633 | &error_msg); |
| 634 | ASSERT_TRUE(map0.IsValid()) << error_msg; |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 635 | ASSERT_TRUE(error_msg.empty()); |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 636 | ASSERT_EQ(map_base, map0.Begin()); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 637 | MemMap map1 = MemMap::MapAnonymous("MapAnonymous1", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 638 | kPageSize, |
| 639 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 640 | /*low_4gb=*/ false, |
| 641 | &reservation, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 642 | &error_msg); |
| 643 | ASSERT_TRUE(map1.IsValid()) << error_msg; |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 644 | ASSERT_TRUE(error_msg.empty()); |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 645 | ASSERT_EQ(map_base + kPageSize, map1.Begin()); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 646 | MemMap map2 = MemMap::MapAnonymous("MapAnonymous2", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 647 | kPageSize, |
| 648 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 649 | /*low_4gb=*/ false, |
| 650 | &reservation, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 651 | &error_msg); |
| 652 | ASSERT_TRUE(map2.IsValid()) << error_msg; |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 653 | ASSERT_TRUE(error_msg.empty()); |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 654 | ASSERT_EQ(map_base + 2 * kPageSize, map2.Begin()); |
| 655 | ASSERT_FALSE(reservation.IsValid()); // The entire reservation was used. |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 656 | |
| 657 | // One-map cases. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 658 | ASSERT_TRUE(MemMap::CheckNoGaps(map0, map0)); |
| 659 | ASSERT_TRUE(MemMap::CheckNoGaps(map1, map1)); |
| 660 | ASSERT_TRUE(MemMap::CheckNoGaps(map2, map2)); |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 661 | |
| 662 | // Two or three-map cases. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 663 | ASSERT_TRUE(MemMap::CheckNoGaps(map0, map1)); |
| 664 | ASSERT_TRUE(MemMap::CheckNoGaps(map1, map2)); |
| 665 | ASSERT_TRUE(MemMap::CheckNoGaps(map0, map2)); |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 666 | |
| 667 | // Unmap the middle one. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 668 | map1.Reset(); |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 669 | |
| 670 | // Should return false now that there's a gap in the middle. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 671 | ASSERT_FALSE(MemMap::CheckNoGaps(map0, map2)); |
Hiroshi Yamauchi | 3eed93d | 2014-06-04 11:43:59 -0700 | [diff] [blame] | 672 | } |
| 673 | |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 674 | TEST_F(MemMapTest, AlignBy) { |
| 675 | CommonInit(); |
| 676 | std::string error_msg; |
| 677 | // Cast the page size to size_t. |
| 678 | const size_t page_size = static_cast<size_t>(kPageSize); |
| 679 | // Map a region. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 680 | MemMap m0 = MemMap::MapAnonymous("MemMapTest_AlignByTest_map0", |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 681 | 14 * page_size, |
| 682 | PROT_READ | PROT_WRITE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 683 | /*low_4gb=*/ false, |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 684 | &error_msg); |
| 685 | ASSERT_TRUE(m0.IsValid()); |
| 686 | uint8_t* base0 = m0.Begin(); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 687 | ASSERT_TRUE(base0 != nullptr) << error_msg; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 688 | ASSERT_EQ(m0.Size(), 14 * page_size); |
| 689 | ASSERT_EQ(m0.BaseBegin(), base0); |
| 690 | ASSERT_EQ(m0.BaseSize(), m0.Size()); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 691 | |
| 692 | // Break it into several regions by using RemapAtEnd. |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 693 | MemMap m1 = m0.RemapAtEnd(base0 + 3 * page_size, |
| 694 | "MemMapTest_AlignByTest_map1", |
| 695 | PROT_READ | PROT_WRITE, |
| 696 | &error_msg); |
| 697 | uint8_t* base1 = m1.Begin(); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 698 | ASSERT_TRUE(base1 != nullptr) << error_msg; |
| 699 | ASSERT_EQ(base1, base0 + 3 * page_size); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 700 | ASSERT_EQ(m0.Size(), 3 * page_size); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 701 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 702 | MemMap m2 = m1.RemapAtEnd(base1 + 4 * page_size, |
| 703 | "MemMapTest_AlignByTest_map2", |
| 704 | PROT_READ | PROT_WRITE, |
| 705 | &error_msg); |
| 706 | uint8_t* base2 = m2.Begin(); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 707 | ASSERT_TRUE(base2 != nullptr) << error_msg; |
| 708 | ASSERT_EQ(base2, base1 + 4 * page_size); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 709 | ASSERT_EQ(m1.Size(), 4 * page_size); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 710 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 711 | MemMap m3 = m2.RemapAtEnd(base2 + 3 * page_size, |
| 712 | "MemMapTest_AlignByTest_map1", |
| 713 | PROT_READ | PROT_WRITE, |
| 714 | &error_msg); |
| 715 | uint8_t* base3 = m3.Begin(); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 716 | ASSERT_TRUE(base3 != nullptr) << error_msg; |
| 717 | ASSERT_EQ(base3, base2 + 3 * page_size); |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 718 | ASSERT_EQ(m2.Size(), 3 * page_size); |
| 719 | ASSERT_EQ(m3.Size(), 4 * page_size); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 720 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 721 | uint8_t* end0 = base0 + m0.Size(); |
| 722 | uint8_t* end1 = base1 + m1.Size(); |
| 723 | uint8_t* end2 = base2 + m2.Size(); |
| 724 | uint8_t* end3 = base3 + m3.Size(); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 725 | |
| 726 | ASSERT_EQ(static_cast<size_t>(end3 - base0), 14 * page_size); |
| 727 | |
| 728 | if (IsAlignedParam(base0, 2 * page_size)) { |
| 729 | ASSERT_FALSE(IsAlignedParam(base1, 2 * page_size)); |
| 730 | ASSERT_FALSE(IsAlignedParam(base2, 2 * page_size)); |
| 731 | ASSERT_TRUE(IsAlignedParam(base3, 2 * page_size)); |
| 732 | ASSERT_TRUE(IsAlignedParam(end3, 2 * page_size)); |
| 733 | } else { |
| 734 | ASSERT_TRUE(IsAlignedParam(base1, 2 * page_size)); |
| 735 | ASSERT_TRUE(IsAlignedParam(base2, 2 * page_size)); |
| 736 | ASSERT_FALSE(IsAlignedParam(base3, 2 * page_size)); |
| 737 | ASSERT_FALSE(IsAlignedParam(end3, 2 * page_size)); |
| 738 | } |
| 739 | |
| 740 | // Align by 2 * page_size; |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 741 | m0.AlignBy(2 * page_size); |
| 742 | m1.AlignBy(2 * page_size); |
| 743 | m2.AlignBy(2 * page_size); |
| 744 | m3.AlignBy(2 * page_size); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 745 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 746 | EXPECT_TRUE(IsAlignedParam(m0.Begin(), 2 * page_size)); |
| 747 | EXPECT_TRUE(IsAlignedParam(m1.Begin(), 2 * page_size)); |
| 748 | EXPECT_TRUE(IsAlignedParam(m2.Begin(), 2 * page_size)); |
| 749 | EXPECT_TRUE(IsAlignedParam(m3.Begin(), 2 * page_size)); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 750 | |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 751 | EXPECT_TRUE(IsAlignedParam(m0.Begin() + m0.Size(), 2 * page_size)); |
| 752 | EXPECT_TRUE(IsAlignedParam(m1.Begin() + m1.Size(), 2 * page_size)); |
| 753 | EXPECT_TRUE(IsAlignedParam(m2.Begin() + m2.Size(), 2 * page_size)); |
| 754 | EXPECT_TRUE(IsAlignedParam(m3.Begin() + m3.Size(), 2 * page_size)); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 755 | |
| 756 | if (IsAlignedParam(base0, 2 * page_size)) { |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 757 | EXPECT_EQ(m0.Begin(), base0); |
| 758 | EXPECT_EQ(m0.Begin() + m0.Size(), end0 - page_size); |
| 759 | EXPECT_EQ(m1.Begin(), base1 + page_size); |
| 760 | EXPECT_EQ(m1.Begin() + m1.Size(), end1 - page_size); |
| 761 | EXPECT_EQ(m2.Begin(), base2 + page_size); |
| 762 | EXPECT_EQ(m2.Begin() + m2.Size(), end2); |
| 763 | EXPECT_EQ(m3.Begin(), base3); |
| 764 | EXPECT_EQ(m3.Begin() + m3.Size(), end3); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 765 | } else { |
Vladimir Marko | c34bebf | 2018-08-16 16:12:49 +0100 | [diff] [blame] | 766 | EXPECT_EQ(m0.Begin(), base0 + page_size); |
| 767 | EXPECT_EQ(m0.Begin() + m0.Size(), end0); |
| 768 | EXPECT_EQ(m1.Begin(), base1); |
| 769 | EXPECT_EQ(m1.Begin() + m1.Size(), end1); |
| 770 | EXPECT_EQ(m2.Begin(), base2); |
| 771 | EXPECT_EQ(m2.Begin() + m2.Size(), end2 - page_size); |
| 772 | EXPECT_EQ(m3.Begin(), base3 + page_size); |
| 773 | EXPECT_EQ(m3.Begin() + m3.Size(), end3 - page_size); |
Hiroshi Yamauchi | 3c3c4a1 | 2017-02-21 16:49:59 -0800 | [diff] [blame] | 774 | } |
| 775 | } |
| 776 | |
Vladimir Marko | c09cd05 | 2018-08-23 16:36:36 +0100 | [diff] [blame] | 777 | TEST_F(MemMapTest, Reservation) { |
| 778 | CommonInit(); |
| 779 | std::string error_msg; |
| 780 | ScratchFile scratch_file; |
| 781 | constexpr size_t kMapSize = 5 * kPageSize; |
| 782 | std::unique_ptr<uint8_t[]> data(new uint8_t[kMapSize]()); |
| 783 | ASSERT_TRUE(scratch_file.GetFile()->WriteFully(&data[0], kMapSize)); |
| 784 | |
| 785 | MemMap reservation = MemMap::MapAnonymous("Test reservation", |
Vladimir Marko | c09cd05 | 2018-08-23 16:36:36 +0100 | [diff] [blame] | 786 | kMapSize, |
| 787 | PROT_NONE, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 788 | /*low_4gb=*/ false, |
Vladimir Marko | c09cd05 | 2018-08-23 16:36:36 +0100 | [diff] [blame] | 789 | &error_msg); |
| 790 | ASSERT_TRUE(reservation.IsValid()); |
| 791 | ASSERT_TRUE(error_msg.empty()); |
| 792 | |
| 793 | // Map first part of the reservation. |
| 794 | constexpr size_t kChunk1Size = kPageSize - 1u; |
| 795 | static_assert(kChunk1Size < kMapSize, "We want to split the reservation."); |
| 796 | uint8_t* addr1 = reservation.Begin(); |
| 797 | MemMap map1 = MemMap::MapFileAtAddress(addr1, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 798 | /*byte_count=*/ kChunk1Size, |
Vladimir Marko | c09cd05 | 2018-08-23 16:36:36 +0100 | [diff] [blame] | 799 | PROT_READ, |
| 800 | MAP_PRIVATE, |
| 801 | scratch_file.GetFd(), |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 802 | /*start=*/ 0, |
| 803 | /*low_4gb=*/ false, |
Vladimir Marko | c09cd05 | 2018-08-23 16:36:36 +0100 | [diff] [blame] | 804 | scratch_file.GetFilename().c_str(), |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 805 | /*reuse=*/ false, |
Vladimir Marko | c09cd05 | 2018-08-23 16:36:36 +0100 | [diff] [blame] | 806 | &reservation, |
| 807 | &error_msg); |
| 808 | ASSERT_TRUE(map1.IsValid()) << error_msg; |
| 809 | ASSERT_TRUE(error_msg.empty()); |
| 810 | ASSERT_EQ(map1.Size(), kChunk1Size); |
| 811 | ASSERT_EQ(addr1, map1.Begin()); |
| 812 | ASSERT_TRUE(reservation.IsValid()); |
| 813 | // Entire pages are taken from the `reservation`. |
| 814 | ASSERT_LT(map1.End(), map1.BaseEnd()); |
| 815 | ASSERT_EQ(map1.BaseEnd(), reservation.Begin()); |
| 816 | |
| 817 | // Map second part as an anonymous mapping. |
| 818 | constexpr size_t kChunk2Size = 2 * kPageSize; |
| 819 | DCHECK_LT(kChunk2Size, reservation.Size()); // We want to split the reservation. |
| 820 | uint8_t* addr2 = reservation.Begin(); |
| 821 | MemMap map2 = MemMap::MapAnonymous("MiddleReservation", |
| 822 | addr2, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 823 | /*byte_count=*/ kChunk2Size, |
Vladimir Marko | c09cd05 | 2018-08-23 16:36:36 +0100 | [diff] [blame] | 824 | PROT_READ, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 825 | /*low_4gb=*/ false, |
| 826 | /*reuse=*/ false, |
Vladimir Marko | c09cd05 | 2018-08-23 16:36:36 +0100 | [diff] [blame] | 827 | &reservation, |
| 828 | &error_msg); |
| 829 | ASSERT_TRUE(map2.IsValid()) << error_msg; |
| 830 | ASSERT_TRUE(error_msg.empty()); |
| 831 | ASSERT_EQ(map2.Size(), kChunk2Size); |
| 832 | ASSERT_EQ(addr2, map2.Begin()); |
| 833 | ASSERT_EQ(map2.End(), map2.BaseEnd()); // kChunk2Size is page aligned. |
| 834 | ASSERT_EQ(map2.BaseEnd(), reservation.Begin()); |
| 835 | |
| 836 | // Map the rest of the reservation except the last byte. |
| 837 | const size_t kChunk3Size = reservation.Size() - 1u; |
| 838 | uint8_t* addr3 = reservation.Begin(); |
| 839 | MemMap map3 = MemMap::MapFileAtAddress(addr3, |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 840 | /*byte_count=*/ kChunk3Size, |
Vladimir Marko | c09cd05 | 2018-08-23 16:36:36 +0100 | [diff] [blame] | 841 | PROT_READ, |
| 842 | MAP_PRIVATE, |
| 843 | scratch_file.GetFd(), |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 844 | /*start=*/ dchecked_integral_cast<size_t>(addr3 - addr1), |
| 845 | /*low_4gb=*/ false, |
Vladimir Marko | c09cd05 | 2018-08-23 16:36:36 +0100 | [diff] [blame] | 846 | scratch_file.GetFilename().c_str(), |
Vladimir Marko | 1130659 | 2018-10-26 14:22:59 +0100 | [diff] [blame] | 847 | /*reuse=*/ false, |
Vladimir Marko | c09cd05 | 2018-08-23 16:36:36 +0100 | [diff] [blame] | 848 | &reservation, |
| 849 | &error_msg); |
| 850 | ASSERT_TRUE(map3.IsValid()) << error_msg; |
| 851 | ASSERT_TRUE(error_msg.empty()); |
| 852 | ASSERT_EQ(map3.Size(), kChunk3Size); |
| 853 | ASSERT_EQ(addr3, map3.Begin()); |
| 854 | // Entire pages are taken from the `reservation`, so it's now exhausted. |
| 855 | ASSERT_FALSE(reservation.IsValid()); |
| 856 | |
| 857 | // Now split the MiddleReservation. |
| 858 | constexpr size_t kChunk2ASize = kPageSize - 1u; |
| 859 | DCHECK_LT(kChunk2ASize, map2.Size()); // We want to split the reservation. |
| 860 | MemMap map2a = map2.TakeReservedMemory(kChunk2ASize); |
| 861 | ASSERT_TRUE(map2a.IsValid()) << error_msg; |
| 862 | ASSERT_TRUE(error_msg.empty()); |
| 863 | ASSERT_EQ(map2a.Size(), kChunk2ASize); |
| 864 | ASSERT_EQ(addr2, map2a.Begin()); |
| 865 | ASSERT_TRUE(map2.IsValid()); |
| 866 | ASSERT_LT(map2a.End(), map2a.BaseEnd()); |
| 867 | ASSERT_EQ(map2a.BaseEnd(), map2.Begin()); |
| 868 | |
| 869 | // And take the rest of the middle reservation. |
| 870 | const size_t kChunk2BSize = map2.Size() - 1u; |
| 871 | uint8_t* addr2b = map2.Begin(); |
| 872 | MemMap map2b = map2.TakeReservedMemory(kChunk2BSize); |
| 873 | ASSERT_TRUE(map2b.IsValid()) << error_msg; |
| 874 | ASSERT_TRUE(error_msg.empty()); |
| 875 | ASSERT_EQ(map2b.Size(), kChunk2ASize); |
| 876 | ASSERT_EQ(addr2b, map2b.Begin()); |
| 877 | ASSERT_FALSE(map2.IsValid()); |
| 878 | } |
| 879 | |
Brian Carlstrom | 9004cb6 | 2013-07-26 15:48:31 -0700 | [diff] [blame] | 880 | } // namespace art |
Andreas Gampe | c857f4a | 2018-10-25 13:12:37 -0700 | [diff] [blame] | 881 | |
| 882 | namespace { |
| 883 | |
| 884 | class DumpMapsOnFailListener : public testing::EmptyTestEventListener { |
| 885 | void OnTestPartResult(const testing::TestPartResult& result) override { |
| 886 | switch (result.type()) { |
| 887 | case testing::TestPartResult::kFatalFailure: |
| 888 | art::PrintFileToLog("/proc/self/maps", android::base::LogSeverity::ERROR); |
| 889 | break; |
| 890 | |
| 891 | // TODO: Could consider logging on EXPECT failures. |
| 892 | case testing::TestPartResult::kNonFatalFailure: |
Elliott Hughes | e00648f | 2018-10-30 08:34:52 -0700 | [diff] [blame] | 893 | case testing::TestPartResult::kSkip: |
Andreas Gampe | c857f4a | 2018-10-25 13:12:37 -0700 | [diff] [blame] | 894 | case testing::TestPartResult::kSuccess: |
| 895 | break; |
| 896 | } |
| 897 | } |
| 898 | }; |
| 899 | |
| 900 | } // namespace |
| 901 | |
| 902 | // Inject our listener into the test runner. |
| 903 | extern "C" |
| 904 | __attribute__((visibility("default"))) __attribute__((used)) |
| 905 | void ArtTestGlobalInit() { |
| 906 | LOG(ERROR) << "Installing listener"; |
| 907 | testing::UnitTest::GetInstance()->listeners().Append(new DumpMapsOnFailListener()); |
| 908 | } |