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 | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 75 | Elf* elf = info.GetElf(process_memory_, ARCH_ARM); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 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 | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 87 | Elf* elf = info.GetElf(process_memory_, ARCH_ARM); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 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 | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 101 | Elf* elf = info.GetElf(process_memory_, ARCH_ARM64); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 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 | |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 108 | TEST_F(MapInfoGetElfTest, invalid_arch_mismatch) { |
| 109 | MapInfo info(nullptr, 0x3000, 0x4000, 0, PROT_READ, ""); |
| 110 | |
| 111 | Elf32_Ehdr ehdr; |
| 112 | TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM); |
| 113 | memory_->SetMemory(0x3000, &ehdr, sizeof(ehdr)); |
| 114 | |
| 115 | Elf* elf = info.GetElf(process_memory_, ARCH_X86); |
| 116 | ASSERT_TRUE(elf != nullptr); |
| 117 | ASSERT_FALSE(elf->valid()); |
| 118 | } |
| 119 | |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 120 | TEST_F(MapInfoGetElfTest, gnu_debugdata_init32) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame] | 121 | MapInfo info(nullptr, 0x2000, 0x3000, 0, PROT_READ, ""); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 122 | |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 123 | TestInitGnuDebugdata<Elf32_Ehdr, Elf32_Shdr>(ELFCLASS32, EM_ARM, true, |
| 124 | [&](uint64_t offset, const void* ptr, size_t size) { |
| 125 | memory_->SetMemory(0x2000 + offset, ptr, size); |
| 126 | }); |
| 127 | |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 128 | Elf* elf = info.GetElf(process_memory_, ARCH_ARM); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 129 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 130 | ASSERT_TRUE(elf->valid()); |
| 131 | EXPECT_EQ(static_cast<uint32_t>(EM_ARM), elf->machine_type()); |
| 132 | EXPECT_EQ(ELFCLASS32, elf->class_type()); |
| 133 | EXPECT_TRUE(elf->gnu_debugdata_interface() != nullptr); |
| 134 | } |
| 135 | |
| 136 | TEST_F(MapInfoGetElfTest, gnu_debugdata_init64) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame] | 137 | MapInfo info(nullptr, 0x5000, 0x8000, 0, PROT_READ, ""); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 138 | |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 139 | TestInitGnuDebugdata<Elf64_Ehdr, Elf64_Shdr>(ELFCLASS64, EM_AARCH64, true, |
| 140 | [&](uint64_t offset, const void* ptr, size_t size) { |
| 141 | memory_->SetMemory(0x5000 + offset, ptr, size); |
| 142 | }); |
| 143 | |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 144 | Elf* elf = info.GetElf(process_memory_, ARCH_ARM64); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 145 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 570b76f | 2017-06-30 17:18:16 -0700 | [diff] [blame] | 146 | ASSERT_TRUE(elf->valid()); |
| 147 | EXPECT_EQ(static_cast<uint32_t>(EM_AARCH64), elf->machine_type()); |
| 148 | EXPECT_EQ(ELFCLASS64, elf->class_type()); |
| 149 | EXPECT_TRUE(elf->gnu_debugdata_interface() != nullptr); |
| 150 | } |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 151 | |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 152 | TEST_F(MapInfoGetElfTest, end_le_start) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame] | 153 | MapInfo info(nullptr, 0x1000, 0x1000, 0, PROT_READ, elf_.path); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 154 | |
| 155 | Elf32_Ehdr ehdr; |
| 156 | TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM); |
| 157 | ASSERT_TRUE(android::base::WriteFully(elf_.fd, &ehdr, sizeof(ehdr))); |
| 158 | |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 159 | Elf* elf = info.GetElf(process_memory_, ARCH_ARM); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 160 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 161 | ASSERT_FALSE(elf->valid()); |
| 162 | |
Christopher Ferris | 0b79ae1 | 2018-01-25 12:15:56 -0800 | [diff] [blame] | 163 | info.elf.reset(); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 164 | info.end = 0xfff; |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 165 | elf = info.GetElf(process_memory_, ARCH_ARM); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 166 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 167 | ASSERT_FALSE(elf->valid()); |
| 168 | |
| 169 | // Make sure this test is valid. |
Christopher Ferris | 0b79ae1 | 2018-01-25 12:15:56 -0800 | [diff] [blame] | 170 | info.elf.reset(); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 171 | info.end = 0x2000; |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 172 | elf = info.GetElf(process_memory_, ARCH_ARM); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 173 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 174 | ASSERT_TRUE(elf->valid()); |
| 175 | } |
| 176 | |
| 177 | // Verify that if the offset is non-zero but there is no elf at the offset, |
| 178 | // that the full file is used. |
| 179 | TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_full_file) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame] | 180 | MapInfo info(nullptr, 0x1000, 0x2000, 0x100, PROT_READ, elf_.path); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 181 | |
| 182 | std::vector<uint8_t> buffer(0x1000); |
| 183 | memset(buffer.data(), 0, buffer.size()); |
| 184 | Elf32_Ehdr ehdr; |
| 185 | TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM); |
| 186 | memcpy(buffer.data(), &ehdr, sizeof(ehdr)); |
| 187 | ASSERT_TRUE(android::base::WriteFully(elf_.fd, buffer.data(), buffer.size())); |
| 188 | |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 189 | Elf* elf = info.GetElf(process_memory_, ARCH_ARM); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 190 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 191 | ASSERT_TRUE(elf->valid()); |
| 192 | ASSERT_TRUE(elf->memory() != nullptr); |
| 193 | ASSERT_EQ(0x100U, info.elf_offset); |
| 194 | |
| 195 | // Read the entire file. |
| 196 | memset(buffer.data(), 0, buffer.size()); |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 197 | ASSERT_TRUE(elf->memory()->ReadFully(0, buffer.data(), buffer.size())); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 198 | ASSERT_EQ(0, memcmp(buffer.data(), &ehdr, sizeof(ehdr))); |
| 199 | for (size_t i = sizeof(ehdr); i < buffer.size(); i++) { |
| 200 | ASSERT_EQ(0, buffer[i]) << "Failed at byte " << i; |
| 201 | } |
| 202 | |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 203 | ASSERT_FALSE(elf->memory()->ReadFully(buffer.size(), buffer.data(), 1)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | // Verify that if the offset is non-zero and there is an elf at that |
| 207 | // offset, that only part of the file is used. |
| 208 | TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_partial_file) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame] | 209 | MapInfo info(nullptr, 0x1000, 0x2000, 0x2000, PROT_READ, elf_.path); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 210 | |
| 211 | std::vector<uint8_t> buffer(0x4000); |
| 212 | memset(buffer.data(), 0, buffer.size()); |
| 213 | Elf32_Ehdr ehdr; |
| 214 | TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM); |
| 215 | memcpy(&buffer[info.offset], &ehdr, sizeof(ehdr)); |
| 216 | ASSERT_TRUE(android::base::WriteFully(elf_.fd, buffer.data(), buffer.size())); |
| 217 | |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 218 | Elf* elf = info.GetElf(process_memory_, ARCH_ARM); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 219 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 220 | ASSERT_TRUE(elf->valid()); |
| 221 | ASSERT_TRUE(elf->memory() != nullptr); |
| 222 | ASSERT_EQ(0U, info.elf_offset); |
| 223 | |
| 224 | // Read the valid part of the file. |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 225 | ASSERT_TRUE(elf->memory()->ReadFully(0, buffer.data(), 0x1000)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 226 | ASSERT_EQ(0, memcmp(buffer.data(), &ehdr, sizeof(ehdr))); |
| 227 | for (size_t i = sizeof(ehdr); i < 0x1000; i++) { |
| 228 | ASSERT_EQ(0, buffer[i]) << "Failed at byte " << i; |
| 229 | } |
| 230 | |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 231 | ASSERT_FALSE(elf->memory()->ReadFully(0x1000, buffer.data(), 1)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | // Verify that if the offset is non-zero and there is an elf at that |
| 235 | // offset, that only part of the file is used. Further verify that if the |
| 236 | // embedded elf is bigger than the initial map, the new object is larger |
| 237 | // than the original map size. Do this for a 32 bit elf and a 64 bit elf. |
| 238 | TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_partial_file_whole_elf32) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame] | 239 | MapInfo info(nullptr, 0x5000, 0x6000, 0x1000, PROT_READ, elf_.path); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 240 | |
| 241 | std::vector<uint8_t> buffer(0x4000); |
| 242 | memset(buffer.data(), 0, buffer.size()); |
| 243 | Elf32_Ehdr ehdr; |
| 244 | TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM); |
| 245 | ehdr.e_shoff = 0x2000; |
| 246 | ehdr.e_shentsize = sizeof(Elf32_Shdr) + 100; |
| 247 | ehdr.e_shnum = 4; |
| 248 | memcpy(&buffer[info.offset], &ehdr, sizeof(ehdr)); |
| 249 | ASSERT_TRUE(android::base::WriteFully(elf_.fd, buffer.data(), buffer.size())); |
| 250 | |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 251 | Elf* elf = info.GetElf(process_memory_, ARCH_ARM); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 252 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 253 | ASSERT_TRUE(elf->valid()); |
| 254 | ASSERT_TRUE(elf->memory() != nullptr); |
| 255 | ASSERT_EQ(0U, info.elf_offset); |
| 256 | |
| 257 | // Verify the memory is a valid elf. |
| 258 | memset(buffer.data(), 0, buffer.size()); |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 259 | ASSERT_TRUE(elf->memory()->ReadFully(0, buffer.data(), 0x1000)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 260 | ASSERT_EQ(0, memcmp(buffer.data(), &ehdr, sizeof(ehdr))); |
| 261 | |
| 262 | // 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] | 263 | ASSERT_TRUE(elf->memory()->ReadFully(0x1000, buffer.data(), 1)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 264 | } |
| 265 | |
| 266 | TEST_F(MapInfoGetElfTest, file_backed_non_zero_offset_partial_file_whole_elf64) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame] | 267 | MapInfo info(nullptr, 0x7000, 0x8000, 0x1000, PROT_READ, elf_.path); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 268 | |
| 269 | std::vector<uint8_t> buffer(0x4000); |
| 270 | memset(buffer.data(), 0, buffer.size()); |
| 271 | Elf64_Ehdr ehdr; |
| 272 | TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, EM_AARCH64); |
| 273 | ehdr.e_shoff = 0x2000; |
| 274 | ehdr.e_shentsize = sizeof(Elf64_Shdr) + 100; |
| 275 | ehdr.e_shnum = 4; |
| 276 | memcpy(&buffer[info.offset], &ehdr, sizeof(ehdr)); |
| 277 | ASSERT_TRUE(android::base::WriteFully(elf_.fd, buffer.data(), buffer.size())); |
| 278 | |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 279 | Elf* elf = info.GetElf(process_memory_, ARCH_ARM64); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 280 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 281 | ASSERT_TRUE(elf->valid()); |
| 282 | ASSERT_TRUE(elf->memory() != nullptr); |
| 283 | ASSERT_EQ(0U, info.elf_offset); |
| 284 | |
| 285 | // Verify the memory is a valid elf. |
| 286 | memset(buffer.data(), 0, buffer.size()); |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 287 | ASSERT_TRUE(elf->memory()->ReadFully(0, buffer.data(), 0x1000)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 288 | ASSERT_EQ(0, memcmp(buffer.data(), &ehdr, sizeof(ehdr))); |
| 289 | |
| 290 | // 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] | 291 | ASSERT_TRUE(elf->memory()->ReadFully(0x1000, buffer.data(), 1)); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | TEST_F(MapInfoGetElfTest, process_memory_not_read_only) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame] | 295 | MapInfo info(nullptr, 0x9000, 0xa000, 0x1000, 0, ""); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 296 | |
| 297 | // Create valid elf data in process memory only. |
| 298 | Elf64_Ehdr ehdr; |
| 299 | TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, EM_AARCH64); |
| 300 | ehdr.e_shoff = 0x2000; |
| 301 | ehdr.e_shentsize = sizeof(Elf64_Shdr) + 100; |
Christopher Ferris | 5acf069 | 2018-08-01 13:10:46 -0700 | [diff] [blame] | 302 | ehdr.e_shnum = 0; |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 303 | memory_->SetMemory(0x9000, &ehdr, sizeof(ehdr)); |
| 304 | |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 305 | Elf* elf = info.GetElf(process_memory_, ARCH_ARM64); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 306 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 307 | ASSERT_FALSE(elf->valid()); |
| 308 | |
Christopher Ferris | 0b79ae1 | 2018-01-25 12:15:56 -0800 | [diff] [blame] | 309 | info.elf.reset(); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 310 | info.flags = PROT_READ; |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 311 | elf = info.GetElf(process_memory_, ARCH_ARM64); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 312 | ASSERT_TRUE(elf->valid()); |
| 313 | } |
| 314 | |
| 315 | TEST_F(MapInfoGetElfTest, check_device_maps) { |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame] | 316 | MapInfo info(nullptr, 0x7000, 0x8000, 0x1000, PROT_READ | MAPS_FLAGS_DEVICE_MAP, |
| 317 | "/dev/something"); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 318 | |
| 319 | // Create valid elf data in process memory for this to verify that only |
| 320 | // the name is causing invalid elf data. |
| 321 | Elf64_Ehdr ehdr; |
| 322 | TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, EM_X86_64); |
| 323 | ehdr.e_shoff = 0x2000; |
| 324 | ehdr.e_shentsize = sizeof(Elf64_Shdr) + 100; |
Christopher Ferris | 5acf069 | 2018-08-01 13:10:46 -0700 | [diff] [blame] | 325 | ehdr.e_shnum = 0; |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 326 | memory_->SetMemory(0x7000, &ehdr, sizeof(ehdr)); |
| 327 | |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 328 | Elf* elf = info.GetElf(process_memory_, ARCH_X86_64); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 329 | ASSERT_TRUE(elf != nullptr); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 330 | ASSERT_FALSE(elf->valid()); |
| 331 | |
| 332 | // Set the name to nothing to verify that it still fails. |
Christopher Ferris | 0b79ae1 | 2018-01-25 12:15:56 -0800 | [diff] [blame] | 333 | info.elf.reset(); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 334 | info.name = ""; |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 335 | elf = info.GetElf(process_memory_, ARCH_X86_64); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 336 | ASSERT_FALSE(elf->valid()); |
| 337 | |
| 338 | // Change the flags and verify the elf is valid now. |
Christopher Ferris | 0b79ae1 | 2018-01-25 12:15:56 -0800 | [diff] [blame] | 339 | info.elf.reset(); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 340 | info.flags = PROT_READ; |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 341 | elf = info.GetElf(process_memory_, ARCH_X86_64); |
Christopher Ferris | 5f11851 | 2017-09-01 11:17:16 -0700 | [diff] [blame] | 342 | ASSERT_TRUE(elf->valid()); |
| 343 | } |
| 344 | |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 345 | TEST_F(MapInfoGetElfTest, multiple_thread_get_elf) { |
| 346 | static constexpr size_t kNumConcurrentThreads = 100; |
| 347 | |
| 348 | Elf64_Ehdr ehdr; |
| 349 | TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, EM_X86_64); |
| 350 | ehdr.e_shoff = 0x2000; |
| 351 | ehdr.e_shentsize = sizeof(Elf64_Shdr) + 100; |
Christopher Ferris | 5acf069 | 2018-08-01 13:10:46 -0700 | [diff] [blame] | 352 | ehdr.e_shnum = 0; |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 353 | memory_->SetMemory(0x7000, &ehdr, sizeof(ehdr)); |
| 354 | |
| 355 | Elf* elf_in_threads[kNumConcurrentThreads]; |
| 356 | std::vector<std::thread*> threads; |
| 357 | |
| 358 | std::atomic_bool wait; |
| 359 | wait = true; |
| 360 | // Create all of the threads and have them do the GetElf at the same time |
| 361 | // to make it likely that a race will occur. |
Christopher Ferris | 9d5712c | 2018-10-01 21:01:09 -0700 | [diff] [blame] | 362 | MapInfo info(nullptr, 0x7000, 0x8000, 0x1000, PROT_READ, ""); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 363 | for (size_t i = 0; i < kNumConcurrentThreads; i++) { |
| 364 | std::thread* thread = new std::thread([i, this, &wait, &info, &elf_in_threads]() { |
| 365 | while (wait) |
| 366 | ; |
Christopher Ferris | 4568f4b | 2018-10-23 17:42:41 -0700 | [diff] [blame^] | 367 | Elf* elf = info.GetElf(process_memory_, ARCH_X86_64); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 368 | elf_in_threads[i] = elf; |
| 369 | }); |
| 370 | threads.push_back(thread); |
| 371 | } |
| 372 | ASSERT_TRUE(info.elf == nullptr); |
| 373 | |
| 374 | // Set them all going and wait for the threads to finish. |
| 375 | wait = false; |
| 376 | for (auto thread : threads) { |
| 377 | thread->join(); |
| 378 | delete thread; |
| 379 | } |
| 380 | |
| 381 | // 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] | 382 | Elf* elf = info.elf.get(); |
Christopher Ferris | be788d8 | 2017-11-27 14:50:38 -0800 | [diff] [blame] | 383 | ASSERT_TRUE(elf != nullptr); |
| 384 | EXPECT_TRUE(elf->valid()); |
| 385 | for (size_t i = 0; i < kNumConcurrentThreads; i++) { |
| 386 | EXPECT_EQ(elf, elf_in_threads[i]) << "Thread " << i << " mismatched."; |
| 387 | } |
| 388 | } |
| 389 | |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 390 | } // namespace unwindstack |