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 "dex_to_dex_decompiler.h"
18
19 #include "class_linker.h"
20 #include "compiler/common_compiler_test.h"
21 #include "compiler/compiled_method.h"
22 #include "compiler/driver/compiler_options.h"
23 #include "compiler/driver/compiler_driver.h"
24 #include "compiler_callbacks.h"
25 #include "dex_file.h"
26 #include "handle_scope-inl.h"
27 #include "verifier/method_verifier-inl.h"
28 #include "mirror/class_loader.h"
29 #include "runtime.h"
30 #include "thread.h"
31 #include "scoped_thread_state_change-inl.h"
32
33 namespace art {
34
35 class DexToDexDecompilerTest : public CommonCompilerTest {
36 public:
CompileAll(jobject class_loader)37 void CompileAll(jobject class_loader) REQUIRES(!Locks::mutator_lock_) {
38 TimingLogger timings("CompilerDriverTest::CompileAll", false, false);
39 TimingLogger::ScopedTiming t(__FUNCTION__, &timings);
40 compiler_options_->boot_image_ = false;
41 compiler_options_->SetCompilerFilter(CompilerFilter::kQuicken);
42 compiler_driver_->CompileAll(class_loader,
43 GetDexFiles(class_loader),
44 /* verifier_deps */ nullptr,
45 &timings);
46 }
47
RunTest(const char * dex_name)48 void RunTest(const char* dex_name) {
49 Thread* self = Thread::Current();
50 // First load the original dex file.
51 jobject original_class_loader;
52 {
53 ScopedObjectAccess soa(self);
54 original_class_loader = LoadDex(dex_name);
55 }
56 const DexFile* original_dex_file = GetDexFiles(original_class_loader)[0];
57
58 // Load the dex file again and make it writable to quicken them.
59 jobject class_loader;
60 const DexFile* updated_dex_file = nullptr;
61 {
62 ScopedObjectAccess soa(self);
63 class_loader = LoadDex(dex_name);
64 updated_dex_file = GetDexFiles(class_loader)[0];
65 Runtime::Current()->GetClassLinker()->RegisterDexFile(
66 *updated_dex_file, soa.Decode<mirror::ClassLoader>(class_loader).Ptr());
67 }
68 // The dex files should be identical.
69 int cmp = memcmp(original_dex_file->Begin(),
70 updated_dex_file->Begin(),
71 updated_dex_file->Size());
72 ASSERT_EQ(0, cmp);
73
74 updated_dex_file->EnableWrite();
75 CompileAll(class_loader);
76 // The dex files should be different after quickening.
77 cmp = memcmp(original_dex_file->Begin(), updated_dex_file->Begin(), updated_dex_file->Size());
78 ASSERT_NE(0, cmp);
79
80 // Unquicken the dex file.
81 for (uint32_t i = 0; i < updated_dex_file->NumClassDefs(); ++i) {
82 const DexFile::ClassDef& class_def = updated_dex_file->GetClassDef(i);
83 const uint8_t* class_data = updated_dex_file->GetClassData(class_def);
84 if (class_data == nullptr) {
85 continue;
86 }
87 ClassDataItemIterator it(*updated_dex_file, class_data);
88 // Skip fields
89 while (it.HasNextStaticField()) {
90 it.Next();
91 }
92 while (it.HasNextInstanceField()) {
93 it.Next();
94 }
95
96 // Unquicken each method.
97 while (it.HasNextDirectMethod()) {
98 uint32_t method_idx = it.GetMemberIndex();
99 CompiledMethod* compiled_method =
100 compiler_driver_->GetCompiledMethod(MethodReference(updated_dex_file, method_idx));
101 ArrayRef<const uint8_t> table;
102 if (compiled_method != nullptr) {
103 table = compiled_method->GetVmapTable();
104 }
105 optimizer::ArtDecompileDEX(
106 *it.GetMethodCodeItem(), table, /* decompile_return_instruction */ true);
107 it.Next();
108 }
109 while (it.HasNextVirtualMethod()) {
110 uint32_t method_idx = it.GetMemberIndex();
111 CompiledMethod* compiled_method =
112 compiler_driver_->GetCompiledMethod(MethodReference(updated_dex_file, method_idx));
113 ArrayRef<const uint8_t> table;
114 if (compiled_method != nullptr) {
115 table = compiled_method->GetVmapTable();
116 }
117 optimizer::ArtDecompileDEX(
118 *it.GetMethodCodeItem(), table, /* decompile_return_instruction */ true);
119 it.Next();
120 }
121 DCHECK(!it.HasNext());
122 }
123
124 // Make sure after unquickening we go back to the same contents as the original dex file.
125 cmp = memcmp(original_dex_file->Begin(), updated_dex_file->Begin(), updated_dex_file->Size());
126 ASSERT_EQ(0, cmp);
127 }
128 };
129
TEST_F(DexToDexDecompilerTest,VerifierDeps)130 TEST_F(DexToDexDecompilerTest, VerifierDeps) {
131 RunTest("VerifierDeps");
132 }
133
TEST_F(DexToDexDecompilerTest,DexToDexDecompiler)134 TEST_F(DexToDexDecompilerTest, DexToDexDecompiler) {
135 RunTest("DexToDexDecompiler");
136 }
137
138 } // namespace art
139