Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 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 <stdint.h> |
| 18 | #include <sys/mman.h> |
| 19 | #include <sys/stat.h> |
| 20 | #include <sys/types.h> |
| 21 | #include <unistd.h> |
| 22 | |
| 23 | #include <memory> |
| 24 | |
Martin Stjernholm | 9062bb4 | 2019-10-04 01:28:43 +0100 | [diff] [blame] | 25 | #define LOG_TAG "unwind" |
| 26 | #include <log/log.h> |
| 27 | |
Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 28 | #include <android-base/unique_fd.h> |
Martin Stjernholm | b49289b | 2018-12-14 15:26:32 +0000 | [diff] [blame] | 29 | #include <art_api/dex_file_support.h> |
Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 30 | |
| 31 | #include <unwindstack/MapInfo.h> |
| 32 | #include <unwindstack/Memory.h> |
| 33 | |
Christopher Ferris | d70ea5e | 2018-01-30 19:47:24 -0800 | [diff] [blame] | 34 | #include "DexFile.h" |
Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 35 | |
Christopher Ferris | d70ea5e | 2018-01-30 19:47:24 -0800 | [diff] [blame] | 36 | namespace unwindstack { |
| 37 | |
Martin Stjernholm | 9062bb4 | 2019-10-04 01:28:43 +0100 | [diff] [blame] | 38 | static bool CheckDexSupport() { |
| 39 | if (std::string err_msg; !art_api::dex::TryLoadLibdexfileExternal(&err_msg)) { |
| 40 | ALOGW("Failed to initialize DEX file support: %s", err_msg.c_str()); |
| 41 | return false; |
| 42 | } |
| 43 | return true; |
| 44 | } |
| 45 | |
| 46 | static bool HasDexSupport() { |
| 47 | static bool has_dex_support = CheckDexSupport(); |
| 48 | return has_dex_support; |
| 49 | } |
| 50 | |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 51 | std::unique_ptr<DexFile> DexFile::Create(uint64_t dex_file_offset_in_memory, Memory* memory, |
| 52 | MapInfo* info) { |
Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 53 | if (!info->name.empty()) { |
David Srbecky | b9cc4fb | 2019-04-05 18:23:32 +0000 | [diff] [blame] | 54 | std::unique_ptr<DexFile> dex_file = |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 55 | DexFileFromFile::Create(dex_file_offset_in_memory - info->start + info->offset, info->name); |
David Srbecky | b9cc4fb | 2019-04-05 18:23:32 +0000 | [diff] [blame] | 56 | if (dex_file) { |
| 57 | return dex_file; |
Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 58 | } |
| 59 | } |
David Srbecky | b9cc4fb | 2019-04-05 18:23:32 +0000 | [diff] [blame] | 60 | return DexFileFromMemory::Create(dex_file_offset_in_memory, memory, info->name); |
Christopher Ferris | 7747b60 | 2018-01-31 19:05:19 -0800 | [diff] [blame] | 61 | } |
| 62 | |
David Srbecky | b9cc4fb | 2019-04-05 18:23:32 +0000 | [diff] [blame] | 63 | bool DexFile::GetMethodInformation(uint64_t dex_offset, std::string* method_name, |
| 64 | uint64_t* method_offset) { |
Martin Stjernholm | b49289b | 2018-12-14 15:26:32 +0000 | [diff] [blame] | 65 | art_api::dex::MethodInfo method_info = GetMethodInfoForOffset(dex_offset, false); |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 66 | if (method_info.offset == 0) { |
Christopher Ferris | 7747b60 | 2018-01-31 19:05:19 -0800 | [diff] [blame] | 67 | return false; |
| 68 | } |
David Srbecky | b9cc4fb | 2019-04-05 18:23:32 +0000 | [diff] [blame] | 69 | *method_name = method_info.name; |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 70 | *method_offset = dex_offset - method_info.offset; |
| 71 | return true; |
Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 72 | } |
| 73 | |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 74 | std::unique_ptr<DexFileFromFile> DexFileFromFile::Create(uint64_t dex_file_offset_in_file, |
| 75 | const std::string& file) { |
Martin Stjernholm | 9062bb4 | 2019-10-04 01:28:43 +0100 | [diff] [blame] | 76 | if (UNLIKELY(!HasDexSupport())) { |
| 77 | return nullptr; |
| 78 | } |
| 79 | |
Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 80 | android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(file.c_str(), O_RDONLY | O_CLOEXEC))); |
| 81 | if (fd == -1) { |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 82 | return nullptr; |
Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 83 | } |
| 84 | |
Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 85 | std::string error_msg; |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 86 | std::unique_ptr<art_api::dex::DexFile> art_dex_file = |
| 87 | OpenFromFd(fd, dex_file_offset_in_file, file, &error_msg); |
| 88 | if (art_dex_file == nullptr) { |
| 89 | return nullptr; |
| 90 | } |
| 91 | |
| 92 | return std::unique_ptr<DexFileFromFile>(new DexFileFromFile(std::move(*art_dex_file.release()))); |
Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 93 | } |
| 94 | |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 95 | std::unique_ptr<DexFileFromMemory> DexFileFromMemory::Create(uint64_t dex_file_offset_in_memory, |
| 96 | Memory* memory, |
| 97 | const std::string& name) { |
Martin Stjernholm | 9062bb4 | 2019-10-04 01:28:43 +0100 | [diff] [blame] | 98 | if (UNLIKELY(!HasDexSupport())) { |
| 99 | return nullptr; |
| 100 | } |
| 101 | |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 102 | std::vector<uint8_t> backing_memory; |
Martin Stjernholm | cacf5bf | 2018-12-19 00:09:41 +0000 | [diff] [blame] | 103 | |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 104 | for (size_t size = 0;;) { |
| 105 | std::string error_msg; |
| 106 | std::unique_ptr<art_api::dex::DexFile> art_dex_file = |
| 107 | OpenFromMemory(backing_memory.data(), &size, name, &error_msg); |
| 108 | |
| 109 | if (art_dex_file != nullptr) { |
| 110 | return std::unique_ptr<DexFileFromMemory>( |
| 111 | new DexFileFromMemory(std::move(*art_dex_file.release()), std::move(backing_memory))); |
Martin Stjernholm | cacf5bf | 2018-12-19 00:09:41 +0000 | [diff] [blame] | 112 | } |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 113 | |
| 114 | if (!error_msg.empty()) { |
| 115 | return nullptr; |
Martin Stjernholm | cacf5bf | 2018-12-19 00:09:41 +0000 | [diff] [blame] | 116 | } |
Martin Stjernholm | bb4f2b4 | 2018-12-19 14:28:33 +0000 | [diff] [blame] | 117 | |
| 118 | backing_memory.resize(size); |
| 119 | if (!memory->ReadFully(dex_file_offset_in_memory, backing_memory.data(), |
| 120 | backing_memory.size())) { |
| 121 | return nullptr; |
| 122 | } |
Martin Stjernholm | cacf5bf | 2018-12-19 00:09:41 +0000 | [diff] [blame] | 123 | } |
Christopher Ferris | 0b06a59 | 2018-01-19 10:26:36 -0800 | [diff] [blame] | 124 | } |
Christopher Ferris | d70ea5e | 2018-01-30 19:47:24 -0800 | [diff] [blame] | 125 | |
| 126 | } // namespace unwindstack |