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 "base/casts.h"
20 #include "class_linker.h"
21 #include "common_compiler_driver_test.h"
22 #include "compiled_method-inl.h"
23 #include "compiler_callbacks.h"
24 #include "dex/class_accessor-inl.h"
25 #include "dex/dex_file.h"
26 #include "driver/compiler_driver.h"
27 #include "driver/compiler_options.h"
28 #include "handle_scope-inl.h"
29 #include "mirror/class_loader.h"
30 #include "quick_compiler_callbacks.h"
31 #include "runtime.h"
32 #include "scoped_thread_state_change-inl.h"
33 #include "thread.h"
34 #include "verifier/verifier_deps.h"
35
36 namespace art {
37
38 class DexToDexDecompilerTest : public CommonCompilerDriverTest {
39 public:
CompileAll(jobject class_loader)40 void CompileAll(jobject class_loader) REQUIRES(!Locks::mutator_lock_) {
41 TimingLogger timings("DexToDexDecompilerTest::CompileAll", false, false);
42 compiler_options_->image_type_ = CompilerOptions::ImageType::kNone;
43 compiler_options_->SetCompilerFilter(CompilerFilter::kQuicken);
44 // Create the main VerifierDeps, here instead of in the compiler since we want to aggregate
45 // the results for all the dex files, not just the results for the current dex file.
46 down_cast<QuickCompilerCallbacks*>(Runtime::Current()->GetCompilerCallbacks())->SetVerifierDeps(
47 new verifier::VerifierDeps(GetDexFiles(class_loader)));
48 std::vector<const DexFile*> dex_files = GetDexFiles(class_loader);
49 CommonCompilerDriverTest::CompileAll(class_loader, dex_files, &timings);
50 }
51
RunTest(const char * dex_name)52 void RunTest(const char* dex_name) {
53 Thread* self = Thread::Current();
54 // First load the original dex file.
55 jobject original_class_loader;
56 {
57 ScopedObjectAccess soa(self);
58 original_class_loader = LoadDex(dex_name);
59 }
60 const DexFile* original_dex_file = GetDexFiles(original_class_loader)[0];
61
62 // Load the dex file again and make it writable to quicken them.
63 jobject class_loader;
64 const DexFile* updated_dex_file = nullptr;
65 {
66 ScopedObjectAccess soa(self);
67 class_loader = LoadDex(dex_name);
68 updated_dex_file = GetDexFiles(class_loader)[0];
69 Runtime::Current()->GetClassLinker()->RegisterDexFile(
70 *updated_dex_file, soa.Decode<mirror::ClassLoader>(class_loader));
71 }
72 // The dex files should be identical.
73 int cmp = memcmp(original_dex_file->Begin(),
74 updated_dex_file->Begin(),
75 updated_dex_file->Size());
76 ASSERT_EQ(0, cmp);
77
78 updated_dex_file->EnableWrite();
79 CompileAll(class_loader);
80 // The dex files should be different after quickening.
81 cmp = memcmp(original_dex_file->Begin(), updated_dex_file->Begin(), updated_dex_file->Size());
82 ASSERT_NE(0, cmp);
83
84 // Unquicken the dex file.
85 for (ClassAccessor accessor : updated_dex_file->GetClasses()) {
86 // Unquicken each method.
87 for (const ClassAccessor::Method& method : accessor.GetMethods()) {
88 CompiledMethod* compiled_method = compiler_driver_->GetCompiledMethod(
89 method.GetReference());
90 ArrayRef<const uint8_t> table;
91 if (compiled_method != nullptr) {
92 table = compiled_method->GetVmapTable();
93 }
94 optimizer::ArtDecompileDEX(*updated_dex_file,
95 *accessor.GetCodeItem(method),
96 table,
97 /* decompile_return_instruction= */ true);
98 }
99 }
100
101 // Make sure after unquickening we go back to the same contents as the original dex file.
102 cmp = memcmp(original_dex_file->Begin(), updated_dex_file->Begin(), updated_dex_file->Size());
103 ASSERT_EQ(0, cmp);
104 }
105 };
106
TEST_F(DexToDexDecompilerTest,VerifierDeps)107 TEST_F(DexToDexDecompilerTest, VerifierDeps) {
108 RunTest("VerifierDeps");
109 }
110
TEST_F(DexToDexDecompilerTest,DexToDexDecompiler)111 TEST_F(DexToDexDecompilerTest, DexToDexDecompiler) {
112 RunTest("DexToDexDecompiler");
113 }
114
115 } // namespace art
116