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
25 #include <android-base/unique_fd.h>
26 #include <art_api/dex_file_support.h>
27
28 #include <unwindstack/MapInfo.h>
29 #include <unwindstack/Memory.h>
30
31 #include "DexFile.h"
32
33 namespace unwindstack {
34
Create(uint64_t dex_file_offset_in_memory,Memory * memory,MapInfo * info)35 std::unique_ptr<DexFile> DexFile::Create(uint64_t dex_file_offset_in_memory, Memory* memory,
36 MapInfo* info) {
37 if (!info->name.empty()) {
38 std::unique_ptr<DexFile> dex_file =
39 DexFileFromFile::Create(dex_file_offset_in_memory - info->start + info->offset, info->name);
40 if (dex_file) {
41 return dex_file;
42 }
43 }
44 return DexFileFromMemory::Create(dex_file_offset_in_memory, memory, info->name);
45 }
46
GetMethodInformation(uint64_t dex_offset,std::string * method_name,uint64_t * method_offset)47 bool DexFile::GetMethodInformation(uint64_t dex_offset, std::string* method_name,
48 uint64_t* method_offset) {
49 art_api::dex::MethodInfo method_info = GetMethodInfoForOffset(dex_offset, false);
50 if (method_info.offset == 0) {
51 return false;
52 }
53 *method_name = method_info.name;
54 *method_offset = dex_offset - method_info.offset;
55 return true;
56 }
57
Create(uint64_t dex_file_offset_in_file,const std::string & file)58 std::unique_ptr<DexFileFromFile> DexFileFromFile::Create(uint64_t dex_file_offset_in_file,
59 const std::string& file) {
60 android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(file.c_str(), O_RDONLY | O_CLOEXEC)));
61 if (fd == -1) {
62 return nullptr;
63 }
64
65 std::string error_msg;
66 std::unique_ptr<art_api::dex::DexFile> art_dex_file =
67 OpenFromFd(fd, dex_file_offset_in_file, file, &error_msg);
68 if (art_dex_file == nullptr) {
69 return nullptr;
70 }
71
72 return std::unique_ptr<DexFileFromFile>(new DexFileFromFile(std::move(*art_dex_file.release())));
73 }
74
Create(uint64_t dex_file_offset_in_memory,Memory * memory,const std::string & name)75 std::unique_ptr<DexFileFromMemory> DexFileFromMemory::Create(uint64_t dex_file_offset_in_memory,
76 Memory* memory,
77 const std::string& name) {
78 std::vector<uint8_t> backing_memory;
79
80 for (size_t size = 0;;) {
81 std::string error_msg;
82 std::unique_ptr<art_api::dex::DexFile> art_dex_file =
83 OpenFromMemory(backing_memory.data(), &size, name, &error_msg);
84
85 if (art_dex_file != nullptr) {
86 return std::unique_ptr<DexFileFromMemory>(
87 new DexFileFromMemory(std::move(*art_dex_file.release()), std::move(backing_memory)));
88 }
89
90 if (!error_msg.empty()) {
91 return nullptr;
92 }
93
94 backing_memory.resize(size);
95 if (!memory->ReadFully(dex_file_offset_in_memory, backing_memory.data(),
96 backing_memory.size())) {
97 return nullptr;
98 }
99 }
100 }
101
102 } // namespace unwindstack
103