1 /*
2 * Copyright (C) 2017 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 "code_item_accessors-inl.h"
18
19 #include <sys/mman.h>
20 #include <memory>
21 #include <vector>
22
23 #include "base/mem_map.h"
24 #include "dex_file_loader.h"
25 #include "gtest/gtest.h"
26
27 namespace art {
28
29 class CodeItemAccessorsTest : public ::testing::Test {};
30
CreateFakeDex(bool compact_dex,std::vector<uint8_t> * data)31 std::unique_ptr<const DexFile> CreateFakeDex(bool compact_dex, std::vector<uint8_t>* data) {
32 data->resize(MemMap::GetPageSize());
33 if (compact_dex) {
34 CompactDexFile::Header* header =
35 const_cast<CompactDexFile::Header*>(CompactDexFile::Header::At(data->data()));
36 CompactDexFile::WriteMagic(header->magic_.data());
37 CompactDexFile::WriteCurrentVersion(header->magic_.data());
38 header->data_off_ = 0;
39 header->data_size_ = data->size();
40 header->file_size_ = data->size();
41 } else {
42 auto* header = reinterpret_cast<DexFile::Header*>(data->data());
43 StandardDexFile::WriteMagic(data->data());
44 StandardDexFile::WriteCurrentVersion(data->data());
45 header->header_size_ = sizeof(*header);
46 header->file_size_ = data->size();
47 }
48 DexFileLoader dex_file_loader(data->data(), data->size(), "location");
49 std::string error_msg;
50 std::unique_ptr<const DexFile> dex(dex_file_loader.Open(/*location_checksum=*/123,
51 /*oat_dex_file=*/nullptr,
52 /*verify=*/false,
53 /*verify_checksum=*/false,
54 &error_msg));
55 CHECK(dex != nullptr) << error_msg;
56 return dex;
57 }
58
TEST(CodeItemAccessorsTest,TestDexInstructionsAccessor)59 TEST(CodeItemAccessorsTest, TestDexInstructionsAccessor) {
60 std::vector<uint8_t> standard_dex_data;
61 std::unique_ptr<const DexFile> standard_dex(CreateFakeDex(/*compact_dex=*/false,
62 &standard_dex_data));
63 ASSERT_TRUE(standard_dex != nullptr);
64 static constexpr uint16_t kRegisterSize = 2;
65 static constexpr uint16_t kInsSize = 1;
66 static constexpr uint16_t kOutsSize = 3;
67 static constexpr uint16_t kTriesSize = 4;
68 // debug_info_off_ is not accessible from the helpers yet.
69 static constexpr size_t kInsnsSizeInCodeUnits = 5;
70
71 auto verify_code_item = [&](const DexFile* dex,
72 const dex::CodeItem* item,
73 const uint16_t* insns) {
74 CodeItemInstructionAccessor insns_accessor(*dex, item);
75 EXPECT_TRUE(insns_accessor.HasCodeItem());
76 ASSERT_EQ(insns_accessor.InsnsSizeInCodeUnits(), kInsnsSizeInCodeUnits);
77 EXPECT_EQ(insns_accessor.Insns(), insns);
78
79 CodeItemDataAccessor data_accessor(*dex, item);
80 EXPECT_TRUE(data_accessor.HasCodeItem());
81 EXPECT_EQ(data_accessor.InsnsSizeInCodeUnits(), kInsnsSizeInCodeUnits);
82 EXPECT_EQ(data_accessor.Insns(), insns);
83 EXPECT_EQ(data_accessor.RegistersSize(), kRegisterSize);
84 EXPECT_EQ(data_accessor.InsSize(), kInsSize);
85 EXPECT_EQ(data_accessor.OutsSize(), kOutsSize);
86 EXPECT_EQ(data_accessor.TriesSize(), kTriesSize);
87 };
88
89 StandardDexFile::CodeItem* dex_code_item =
90 reinterpret_cast<StandardDexFile::CodeItem*>(const_cast<uint8_t*>(standard_dex->Begin()));
91 dex_code_item->registers_size_ = kRegisterSize;
92 dex_code_item->ins_size_ = kInsSize;
93 dex_code_item->outs_size_ = kOutsSize;
94 dex_code_item->tries_size_ = kTriesSize;
95 dex_code_item->insns_size_in_code_units_ = kInsnsSizeInCodeUnits;
96 verify_code_item(standard_dex.get(), dex_code_item, dex_code_item->insns_);
97 }
98
99 } // namespace art
100