Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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 <elf.h> |
| 18 | #include <errno.h> |
| 19 | #include <signal.h> |
| 20 | #include <string.h> |
| 21 | #include <sys/mman.h> |
| 22 | #include <sys/ptrace.h> |
| 23 | #include <sys/types.h> |
| 24 | #include <unistd.h> |
| 25 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 26 | #include <atomic> |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 27 | #include <memory> |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 28 | #include <thread> |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 29 | #include <vector> |
| 30 | |
| 31 | #include <android-base/file.h> |
| 32 | #include <android-base/test_utils.h> |
| 33 | #include <gtest/gtest.h> |
| 34 | |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 35 | #include <unwindstack/Elf.h> |
| 36 | #include <unwindstack/MapInfo.h> |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 37 | #include <unwindstack/Maps.h> |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 38 | #include <unwindstack/Memory.h> |
| 39 | |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 40 | #include "ElfTestUtils.h" |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 41 | #include "MemoryFake.h" |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 42 | |
| 43 | namespace unwindstack { |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 44 | |
| 45 | class MapInfoGetElfTest : public ::testing::Test { |
| 46 | protected: |
| 47 | void SetUp() override { |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 48 | memory_ = new MemoryFake; |
| 49 | process_memory_.reset(memory_); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 50 | } |
| 51 | |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 52 | template <typename Ehdr, typename Shdr> |
| 53 | static void InitElf(uint64_t sh_offset, Ehdr* ehdr, uint8_t class_type, uint8_t machine_type) { |
| 54 | memset(ehdr, 0, sizeof(*ehdr)); |
| 55 | memcpy(ehdr->e_ident, ELFMAG, SELFMAG); |
| 56 | ehdr->e_ident[EI_CLASS] = class_type; |
| 57 | ehdr->e_machine = machine_type; |
| 58 | ehdr->e_shoff = sh_offset; |
| 59 | ehdr->e_shentsize = sizeof(Shdr) + 100; |
| 60 | ehdr->e_shnum = 4; |
| 61 | } |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 62 | |
| 63 | const size_t kMapSize = 4096; |
| 64 | |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 65 | std::shared_ptr<Memory> process_memory_; |
| 66 | MemoryFake* memory_; |
| 67 | |
| 68 | TemporaryFile elf_; |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 69 | }; |
| 70 | |
| 71 | TEST_F(MapInfoGetElfTest, invalid) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 72 | MapInfo info(nullptr, 0x1000, 0x2000, 0, PROT_READ, ""); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 73 | |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 74 | // The map is empty, but this should still create an invalid elf object. |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 75 | Elf* elf = info.GetElf(process_memory_, false); |
| 76 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 77 | ASSERT_FALSE(elf->valid()); |
| 78 | } |
| 79 | |
| 80 | TEST_F(MapInfoGetElfTest, valid32) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 81 | MapInfo info(nullptr, 0x3000, 0x4000, 0, PROT_READ, ""); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 82 | |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 83 | Elf32_Ehdr ehdr; |
| 84 | TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 85 | memory_->SetMemory(0x3000, &ehdr, sizeof(ehdr)); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 86 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 87 | Elf* elf = info.GetElf(process_memory_, false); |
| 88 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 89 | ASSERT_TRUE(elf->valid()); |
| 90 | EXPECT_EQ(static_cast<uint32_t>(EM_ARM), elf->machine_type()); |
| 91 | EXPECT_EQ(ELFCLASS32, elf->class_type()); |
| 92 | } |
| 93 | |
| 94 | TEST_F(MapInfoGetElfTest, valid64) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 95 | MapInfo info(nullptr, 0x8000, 0x9000, 0, PROT_READ, ""); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 96 | |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 97 | Elf64_Ehdr ehdr; |
| 98 | TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, EM_AARCH64); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 99 | memory_->SetMemory(0x8000, &ehdr, sizeof(ehdr)); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 100 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 101 | Elf* elf = info.GetElf(process_memory_, false); |
| 102 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 103 | ASSERT_TRUE(elf->valid()); |
| 104 | EXPECT_EQ(static_cast<uint32_t>(EM_AARCH64), elf->machine_type()); |
| 105 | EXPECT_EQ(ELFCLASS64, elf->class_type()); |
| 106 | } |
| 107 | |
| 108 | TEST_F(MapInfoGetElfTest, gnu_debugdata_do_not_init32) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 109 | MapInfo info(nullptr, 0x4000, 0x8000, 0, PROT_READ, ""); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 110 | |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 111 | TestInitGnuDebugdata<Elf32_Ehdr, Elf32_Shdr>(ELFCLASS32, EM_ARM, false, |
| 112 | [&](uint64_t offset, const void* ptr, size_t size) { |
| 113 | memory_->SetMemory(0x4000 + offset, ptr, size); |
| 114 | }); |
| 115 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 116 | Elf* elf = info.GetElf(process_memory_, false); |
| 117 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 118 | ASSERT_TRUE(elf->valid()); |
| 119 | EXPECT_EQ(static_cast<uint32_t>(EM_ARM), elf->machine_type()); |
| 120 | EXPECT_EQ(ELFCLASS32, elf->class_type()); |
| 121 | EXPECT_TRUE(elf->gnu_debugdata_interface() == nullptr); |
| 122 | } |
| 123 | |
| 124 | TEST_F(MapInfoGetElfTest, gnu_debugdata_do_not_init64) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 125 | MapInfo info(nullptr, 0x6000, 0x8000, 0, PROT_READ, ""); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 126 | |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 127 | TestInitGnuDebugdata<Elf64_Ehdr, Elf64_Shdr>(ELFCLASS64, EM_AARCH64, false, |
| 128 | [&](uint64_t offset, const void* ptr, size_t size) { |
| 129 | memory_->SetMemory(0x6000 + offset, ptr, size); |
| 130 | }); |
| 131 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 132 | Elf* elf = info.GetElf(process_memory_, false); |
| 133 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 134 | ASSERT_TRUE(elf->valid()); |
| 135 | EXPECT_EQ(static_cast<uint32_t>(EM_AARCH64), elf->machine_type()); |
| 136 | EXPECT_EQ(ELFCLASS64, elf->class_type()); |
| 137 | EXPECT_TRUE(elf->gnu_debugdata_interface() == nullptr); |
| 138 | } |
| 139 | |
| 140 | TEST_F(MapInfoGetElfTest, gnu_debugdata_init32) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 141 | MapInfo info(nullptr, 0x2000, 0x3000, 0, PROT_READ, ""); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 142 | |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 143 | TestInitGnuDebugdata<Elf32_Ehdr, Elf32_Shdr>(ELFCLASS32, EM_ARM, true, |
| 144 | [&](uint64_t offset, const void* ptr, size_t size) { |
| 145 | memory_->SetMemory(0x2000 + offset, ptr, size); |
| 146 | }); |
| 147 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 148 | Elf* elf = info.GetElf(process_memory_, true); |
| 149 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 150 | ASSERT_TRUE(elf->valid()); |
| 151 | EXPECT_EQ(static_cast<uint32_t>(EM_ARM), elf->machine_type()); |
| 152 | EXPECT_EQ(ELFCLASS32, elf->class_type()); |
| 153 | EXPECT_TRUE(elf->gnu_debugdata_interface() != nullptr); |
| 154 | } |
| 155 | |
| 156 | TEST_F(MapInfoGetElfTest, gnu_debugdata_init64) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 157 | MapInfo info(nullptr, 0x5000, 0x8000, 0, PROT_READ, ""); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 158 | |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 159 | TestInitGnuDebugdata<Elf64_Ehdr, Elf64_Shdr>(ELFCLASS64, EM_AARCH64, true, |
| 160 | [&](uint64_t offset, const void* ptr, size_t size) { |
| 161 | memory_->SetMemory(0x5000 + offset, ptr, size); |
| 162 | }); |
| 163 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 164 | Elf* elf = info.GetElf(process_memory_, true); |
| 165 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 166 | ASSERT_TRUE(elf->valid()); |
| 167 | EXPECT_EQ(static_cast<uint32_t>(EM_AARCH64), elf->machine_type()); |
| 168 | EXPECT_EQ(ELFCLASS64, elf->class_type()); |
| 169 | EXPECT_TRUE(elf->gnu_debugdata_interface() != nullptr); |
| 170 | } |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 171 | |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 172 | TEST_F(MapInfoGetElfTest, end_le_start) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 173 | MapInfo info(nullptr, 0x1000, 0x1000, 0, PROT_READ, elf_.path); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 174 | |
| 175 | Elf32_Ehdr ehdr; |
| 176 | TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM); |
| 177 | ASSERT_TRUE(android::base::WriteFully(elf_.fd, &ehdr, sizeof(ehdr))); |
| 178 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 179 | Elf* elf = info.GetElf(process_memory_, false); |
| 180 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 181 | ASSERT_FALSE(elf->valid()); |
| 182 | |
Christopher Ferris | 0b79ae1 | 2018-01-25 12:15:56 -0800 | [diff] [blame] | 183 | info.elf.reset(); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 184 | info.end = 0xfff; |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 185 | elf = info.GetElf(process_memory_, false); |
| 186 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 187 | ASSERT_FALSE(elf->valid()); |
| 188 | |
| 189 | // Make sure this test is valid. |
Christopher Ferris | 0b79ae1 | 2018-01-25 12:15:56 -0800 | [diff] [blame] | 190 | info.elf.reset(); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 191 | info.end = 0x2000; |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 192 | elf = info.GetElf(process_memory_, false); |
| 193 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 194 | ASSERT_TRUE(elf->valid()); |
| 195 | } |
| 196 | |
| 197 | // Verify that if the offset is non-zero but there is no elf at the offset, |
| 198 | // that the full file is used. |
| 199 | TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_full_file) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 200 | MapInfo info(nullptr, 0x1000, 0x2000, 0x100, PROT_READ, elf_.path); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 201 | |
| 202 | std::vector<uint8_t> buffer(0x1000); |
| 203 | memset(buffer.data(), 0, buffer.size()); |
| 204 | Elf32_Ehdr ehdr; |
| 205 | TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM); |
| 206 | memcpy(buffer.data(), &ehdr, sizeof(ehdr)); |
| 207 | ASSERT_TRUE(android::base::WriteFully(elf_.fd, buffer.data(), buffer.size())); |
| 208 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 209 | Elf* elf = info.GetElf(process_memory_, false); |
| 210 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 211 | ASSERT_TRUE(elf->valid()); |
| 212 | ASSERT_TRUE(elf->memory() != nullptr); |
| 213 | ASSERT_EQ(0x100U, info.elf_offset); |
| 214 | |
| 215 | // Read the entire file. |
| 216 | memset(buffer.data(), 0, buffer.size()); |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 217 | ASSERT_TRUE(elf->memory()->ReadFully(0, buffer.data(), buffer.size())); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 218 | ASSERT_EQ(0, memcmp(buffer.data(), &ehdr, sizeof(ehdr))); |
| 219 | for (size_t i = sizeof(ehdr); i < buffer.size(); i++) { |
| 220 | ASSERT_EQ(0, buffer[i]) << "Failed at byte " << i; |
| 221 | } |
| 222 | |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 223 | ASSERT_FALSE(elf->memory()->ReadFully(buffer.size(), buffer.data(), 1)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | // Verify that if the offset is non-zero and there is an elf at that |
| 227 | // offset, that only part of the file is used. |
| 228 | TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_partial_file) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 229 | MapInfo info(nullptr, 0x1000, 0x2000, 0x2000, PROT_READ, elf_.path); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 230 | |
| 231 | std::vector<uint8_t> buffer(0x4000); |
| 232 | memset(buffer.data(), 0, buffer.size()); |
| 233 | Elf32_Ehdr ehdr; |
| 234 | TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM); |
| 235 | memcpy(&buffer[info.offset], &ehdr, sizeof(ehdr)); |
| 236 | ASSERT_TRUE(android::base::WriteFully(elf_.fd, buffer.data(), buffer.size())); |
| 237 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 238 | Elf* elf = info.GetElf(process_memory_, false); |
| 239 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 240 | ASSERT_TRUE(elf->valid()); |
| 241 | ASSERT_TRUE(elf->memory() != nullptr); |
| 242 | ASSERT_EQ(0U, info.elf_offset); |
| 243 | |
| 244 | // Read the valid part of the file. |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 245 | ASSERT_TRUE(elf->memory()->ReadFully(0, buffer.data(), 0x1000)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 246 | ASSERT_EQ(0, memcmp(buffer.data(), &ehdr, sizeof(ehdr))); |
| 247 | for (size_t i = sizeof(ehdr); i < 0x1000; i++) { |
| 248 | ASSERT_EQ(0, buffer[i]) << "Failed at byte " << i; |
| 249 | } |
| 250 | |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 251 | ASSERT_FALSE(elf->memory()->ReadFully(0x1000, buffer.data(), 1)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | // Verify that if the offset is non-zero and there is an elf at that |
| 255 | // offset, that only part of the file is used. Further verify that if the |
| 256 | // embedded elf is bigger than the initial map, the new object is larger |
| 257 | // than the original map size. Do this for a 32 bit elf and a 64 bit elf. |
| 258 | TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_partial_file_whole_elf32) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 259 | MapInfo info(nullptr, 0x5000, 0x6000, 0x1000, PROT_READ, elf_.path); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 260 | |
| 261 | std::vector<uint8_t> buffer(0x4000); |
| 262 | memset(buffer.data(), 0, buffer.size()); |
| 263 | Elf32_Ehdr ehdr; |
| 264 | TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM); |
| 265 | ehdr.e_shoff = 0x2000; |
| 266 | ehdr.e_shentsize = sizeof(Elf32_Shdr) + 100; |
| 267 | ehdr.e_shnum = 4; |
| 268 | memcpy(&buffer[info.offset], &ehdr, sizeof(ehdr)); |
| 269 | ASSERT_TRUE(android::base::WriteFully(elf_.fd, buffer.data(), buffer.size())); |
| 270 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 271 | Elf* elf = info.GetElf(process_memory_, false); |
| 272 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 273 | ASSERT_TRUE(elf->valid()); |
| 274 | ASSERT_TRUE(elf->memory() != nullptr); |
| 275 | ASSERT_EQ(0U, info.elf_offset); |
| 276 | |
| 277 | // Verify the memory is a valid elf. |
| 278 | memset(buffer.data(), 0, buffer.size()); |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 279 | ASSERT_TRUE(elf->memory()->ReadFully(0, buffer.data(), 0x1000)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 280 | ASSERT_EQ(0, memcmp(buffer.data(), &ehdr, sizeof(ehdr))); |
| 281 | |
| 282 | // Read past the end of what would normally be the size of the map. |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 283 | ASSERT_TRUE(elf->memory()->ReadFully(0x1000, buffer.data(), 1)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_partial_file_whole_elf64) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 287 | MapInfo info(nullptr, 0x7000, 0x8000, 0x1000, PROT_READ, elf_.path); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 288 | |
| 289 | std::vector<uint8_t> buffer(0x4000); |
| 290 | memset(buffer.data(), 0, buffer.size()); |
| 291 | Elf64_Ehdr ehdr; |
| 292 | TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, EM_AARCH64); |
| 293 | ehdr.e_shoff = 0x2000; |
| 294 | ehdr.e_shentsize = sizeof(Elf64_Shdr) + 100; |
| 295 | ehdr.e_shnum = 4; |
| 296 | memcpy(&buffer[info.offset], &ehdr, sizeof(ehdr)); |
| 297 | ASSERT_TRUE(android::base::WriteFully(elf_.fd, buffer.data(), buffer.size())); |
| 298 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 299 | Elf* elf = info.GetElf(process_memory_, false); |
| 300 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 301 | ASSERT_TRUE(elf->valid()); |
| 302 | ASSERT_TRUE(elf->memory() != nullptr); |
| 303 | ASSERT_EQ(0U, info.elf_offset); |
| 304 | |
| 305 | // Verify the memory is a valid elf. |
| 306 | memset(buffer.data(), 0, buffer.size()); |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 307 | ASSERT_TRUE(elf->memory()->ReadFully(0, buffer.data(), 0x1000)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 308 | ASSERT_EQ(0, memcmp(buffer.data(), &ehdr, sizeof(ehdr))); |
| 309 | |
| 310 | // Read past the end of what would normally be the size of the map. |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 311 | ASSERT_TRUE(elf->memory()->ReadFully(0x1000, buffer.data(), 1)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 312 | } |
| 313 | |
| 314 | TEST_F(MapInfoGetElfTest, process_memory_not_read_only) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 315 | MapInfo info(nullptr, 0x9000, 0xa000, 0x1000, 0, ""); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 316 | |
| 317 | // Create valid elf data in process memory only. |
| 318 | Elf64_Ehdr ehdr; |
| 319 | TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, EM_AARCH64); |
| 320 | ehdr.e_shoff = 0x2000; |
| 321 | ehdr.e_shentsize = sizeof(Elf64_Shdr) + 100; |
Christopher Ferris | 5acf069 | 2018-08-01 13:10:46 -0700 | [diff] [blame] | 322 | ehdr.e_shnum = 0; |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 323 | memory_->SetMemory(0x9000, &ehdr, sizeof(ehdr)); |
| 324 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 325 | Elf* elf = info.GetElf(process_memory_, false); |
| 326 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 327 | ASSERT_FALSE(elf->valid()); |
| 328 | |
Christopher Ferris | 0b79ae1 | 2018-01-25 12:15:56 -0800 | [diff] [blame] | 329 | info.elf.reset(); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 330 | info.flags = PROT_READ; |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 331 | elf = info.GetElf(process_memory_, false); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 332 | ASSERT_TRUE(elf->valid()); |
| 333 | } |
| 334 | |
| 335 | TEST_F(MapInfoGetElfTest, check_device_maps) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 336 | MapInfo info(nullptr, 0x7000, 0x8000, 0x1000, PROT_READ | MAPS_FLAGS_DEVICE_MAP, |
| 337 | "/dev/something"); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 338 | |
| 339 | // Create valid elf data in process memory for this to verify that only |
| 340 | // the name is causing invalid elf data. |
| 341 | Elf64_Ehdr ehdr; |
| 342 | TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, EM_X86_64); |
| 343 | ehdr.e_shoff = 0x2000; |
| 344 | ehdr.e_shentsize = sizeof(Elf64_Shdr) + 100; |
Christopher Ferris | 5acf069 | 2018-08-01 13:10:46 -0700 | [diff] [blame] | 345 | ehdr.e_shnum = 0; |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 346 | memory_->SetMemory(0x7000, &ehdr, sizeof(ehdr)); |
| 347 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 348 | Elf* elf = info.GetElf(process_memory_, false); |
| 349 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 350 | ASSERT_FALSE(elf->valid()); |
| 351 | |
| 352 | // Set the name to nothing to verify that it still fails. |
Christopher Ferris | 0b79ae1 | 2018-01-25 12:15:56 -0800 | [diff] [blame] | 353 | info.elf.reset(); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 354 | info.name = ""; |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 355 | elf = info.GetElf(process_memory_, false); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 356 | ASSERT_FALSE(elf->valid()); |
| 357 | |
| 358 | // Change the flags and verify the elf is valid now. |
Christopher Ferris | 0b79ae1 | 2018-01-25 12:15:56 -0800 | [diff] [blame] | 359 | info.elf.reset(); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 360 | info.flags = PROT_READ; |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 361 | elf = info.GetElf(process_memory_, false); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 362 | ASSERT_TRUE(elf->valid()); |
| 363 | } |
| 364 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 365 | TEST_F(MapInfoGetElfTest, multiple_thread_get_elf) { |
| 366 | static constexpr size_t kNumConcurrentThreads = 100; |
| 367 | |
| 368 | Elf64_Ehdr ehdr; |
| 369 | TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, EM_X86_64); |
| 370 | ehdr.e_shoff = 0x2000; |
| 371 | ehdr.e_shentsize = sizeof(Elf64_Shdr) + 100; |
Christopher Ferris | 5acf069 | 2018-08-01 13:10:46 -0700 | [diff] [blame] | 372 | ehdr.e_shnum = 0; |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 373 | memory_->SetMemory(0x7000, &ehdr, sizeof(ehdr)); |
| 374 | |
| 375 | Elf* elf_in_threads[kNumConcurrentThreads]; |
| 376 | std::vector<std::thread*> threads; |
| 377 | |
| 378 | std::atomic_bool wait; |
| 379 | wait = true; |
| 380 | // Create all of the threads and have them do the GetElf at the same time |
| 381 | // to make it likely that a race will occur. |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame^] | 382 | MapInfo info(nullptr, 0x7000, 0x8000, 0x1000, PROT_READ, ""); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 383 | for (size_t i = 0; i < kNumConcurrentThreads; i++) { |
| 384 | std::thread* thread = new std::thread([i, this, &wait, &info, &elf_in_threads]() { |
| 385 | while (wait) |
| 386 | ; |
| 387 | Elf* elf = info.GetElf(process_memory_, false); |
| 388 | elf_in_threads[i] = elf; |
| 389 | }); |
| 390 | threads.push_back(thread); |
| 391 | } |
| 392 | ASSERT_TRUE(info.elf == nullptr); |
| 393 | |
| 394 | // Set them all going and wait for the threads to finish. |
| 395 | wait = false; |
| 396 | for (auto thread : threads) { |
| 397 | thread->join(); |
| 398 | delete thread; |
| 399 | } |
| 400 | |
| 401 | // Now verify that all of the elf files are exactly the same and valid. |
Christopher Ferris | 0b79ae1 | 2018-01-25 12:15:56 -0800 | [diff] [blame] | 402 | Elf* elf = info.elf.get(); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 403 | ASSERT_TRUE(elf != nullptr); |
| 404 | EXPECT_TRUE(elf->valid()); |
| 405 | for (size_t i = 0; i < kNumConcurrentThreads; i++) { |
| 406 | EXPECT_EQ(elf, elf_in_threads[i]) << "Thread " << i << " mismatched."; |
| 407 | } |
| 408 | } |
| 409 | |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 410 | } // namespace unwindstack |