1 /*
2 * Copyright (C) 2014 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 <jni.h>
18 #include <vector>
19
20 #include "art_field-inl.h"
21 #include "base/enums.h"
22 #include "class_linker-inl.h"
23 #include "common_compiler_test.h"
24 #include "mirror/class-inl.h"
25 #include "mirror/field-inl.h"
26 #include "mirror/method.h"
27 #include "scoped_thread_state_change-inl.h"
28
29 namespace art {
30
31 class ProxyTest : public CommonCompilerTest {
32 public:
33 // Generate a proxy class with the given name and interfaces. This is a simplification from what
34 // libcore does to fit to our test needs. We do not check for duplicated interfaces or methods and
35 // we do not declare exceptions.
GenerateProxyClass(ScopedObjectAccess & soa,jobject jclass_loader,const char * className,const std::vector<mirror::Class * > & interfaces)36 mirror::Class* GenerateProxyClass(ScopedObjectAccess& soa, jobject jclass_loader,
37 const char* className,
38 const std::vector<mirror::Class*>& interfaces)
39 REQUIRES_SHARED(Locks::mutator_lock_) {
40 mirror::Class* javaLangObject = class_linker_->FindSystemClass(soa.Self(), "Ljava/lang/Object;");
41 CHECK(javaLangObject != nullptr);
42
43 jclass javaLangClass = soa.AddLocalReference<jclass>(mirror::Class::GetJavaLangClass());
44
45 // Builds the interfaces array.
46 jobjectArray proxyClassInterfaces = soa.Env()->NewObjectArray(interfaces.size(), javaLangClass,
47 nullptr);
48 soa.Self()->AssertNoPendingException();
49 for (size_t i = 0; i < interfaces.size(); ++i) {
50 soa.Env()->SetObjectArrayElement(proxyClassInterfaces, i,
51 soa.AddLocalReference<jclass>(interfaces[i]));
52 }
53
54 // Builds the method array.
55 jsize methods_count = 3; // Object.equals, Object.hashCode and Object.toString.
56 for (mirror::Class* interface : interfaces) {
57 methods_count += interface->NumVirtualMethods();
58 }
59 jobjectArray proxyClassMethods = soa.Env()->NewObjectArray(
60 methods_count, soa.AddLocalReference<jclass>(mirror::Method::StaticClass()), nullptr);
61 soa.Self()->AssertNoPendingException();
62
63 jsize array_index = 0;
64 // Fill the method array
65 DCHECK_EQ(Runtime::Current()->GetClassLinker()->GetImagePointerSize(), kRuntimePointerSize);
66 ArtMethod* method = javaLangObject->FindDeclaredVirtualMethod(
67 "equals", "(Ljava/lang/Object;)Z", kRuntimePointerSize);
68 CHECK(method != nullptr);
69 DCHECK(!Runtime::Current()->IsActiveTransaction());
70 soa.Env()->SetObjectArrayElement(
71 proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
72 mirror::Method::CreateFromArtMethod<kRuntimePointerSize, false>(soa.Self(), method)));
73 method = javaLangObject->FindDeclaredVirtualMethod("hashCode", "()I", kRuntimePointerSize);
74 CHECK(method != nullptr);
75 soa.Env()->SetObjectArrayElement(
76 proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
77 mirror::Method::CreateFromArtMethod<kRuntimePointerSize, false>(soa.Self(), method)));
78 method = javaLangObject->FindDeclaredVirtualMethod(
79 "toString", "()Ljava/lang/String;", kRuntimePointerSize);
80 CHECK(method != nullptr);
81 soa.Env()->SetObjectArrayElement(
82 proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
83 mirror::Method::CreateFromArtMethod<kRuntimePointerSize, false>(soa.Self(), method)));
84 // Now adds all interfaces virtual methods.
85 for (mirror::Class* interface : interfaces) {
86 for (auto& m : interface->GetDeclaredVirtualMethods(kRuntimePointerSize)) {
87 soa.Env()->SetObjectArrayElement(
88 proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
89 mirror::Method::CreateFromArtMethod<kRuntimePointerSize, false>(soa.Self(), &m)));
90 }
91 }
92 CHECK_EQ(array_index, methods_count);
93
94 // Builds an empty exception array.
95 jobjectArray proxyClassThrows = soa.Env()->NewObjectArray(0, javaLangClass, nullptr);
96 soa.Self()->AssertNoPendingException();
97
98 mirror::Class* proxyClass = class_linker_->CreateProxyClass(
99 soa, soa.Env()->NewStringUTF(className), proxyClassInterfaces, jclass_loader,
100 proxyClassMethods, proxyClassThrows);
101 soa.Self()->AssertNoPendingException();
102 return proxyClass;
103 }
104 };
105
106 // Creates a proxy class and check ClassHelper works correctly.
TEST_F(ProxyTest,ProxyClassHelper)107 TEST_F(ProxyTest, ProxyClassHelper) {
108 ScopedObjectAccess soa(Thread::Current());
109 jobject jclass_loader = LoadDex("Interfaces");
110 StackHandleScope<4> hs(soa.Self());
111 Handle<mirror::ClassLoader> class_loader(
112 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader)));
113
114 Handle<mirror::Class> I(hs.NewHandle(
115 class_linker_->FindClass(soa.Self(), "LInterfaces$I;", class_loader)));
116 Handle<mirror::Class> J(hs.NewHandle(
117 class_linker_->FindClass(soa.Self(), "LInterfaces$J;", class_loader)));
118 ASSERT_TRUE(I != nullptr);
119 ASSERT_TRUE(J != nullptr);
120
121 std::vector<mirror::Class*> interfaces;
122 interfaces.push_back(I.Get());
123 interfaces.push_back(J.Get());
124 Handle<mirror::Class> proxy_class(hs.NewHandle(
125 GenerateProxyClass(soa, jclass_loader, "$Proxy1234", interfaces)));
126 interfaces.clear(); // Don't least possibly stale objects in the array as good practice.
127 ASSERT_TRUE(proxy_class != nullptr);
128 ASSERT_TRUE(proxy_class->IsProxyClass());
129 ASSERT_TRUE(proxy_class->IsInitialized());
130
131 EXPECT_EQ(2U, proxy_class->NumDirectInterfaces()); // Interfaces$I and Interfaces$J.
132 EXPECT_OBJ_PTR_EQ(I.Get(), mirror::Class::GetDirectInterface(soa.Self(), proxy_class.Get(), 0));
133 EXPECT_OBJ_PTR_EQ(J.Get(), mirror::Class::GetDirectInterface(soa.Self(), proxy_class.Get(), 1));
134 std::string temp;
135 const char* proxy_class_descriptor = proxy_class->GetDescriptor(&temp);
136 EXPECT_STREQ("L$Proxy1234;", proxy_class_descriptor);
137 EXPECT_EQ(nullptr, proxy_class->GetSourceFile());
138 }
139
140 // Creates a proxy class and check FieldHelper works correctly.
TEST_F(ProxyTest,ProxyFieldHelper)141 TEST_F(ProxyTest, ProxyFieldHelper) {
142 ScopedObjectAccess soa(Thread::Current());
143 jobject jclass_loader = LoadDex("Interfaces");
144 StackHandleScope<9> hs(soa.Self());
145 Handle<mirror::ClassLoader> class_loader(
146 hs.NewHandle(soa.Decode<mirror::ClassLoader>(jclass_loader)));
147
148 Handle<mirror::Class> I(hs.NewHandle(
149 class_linker_->FindClass(soa.Self(), "LInterfaces$I;", class_loader)));
150 Handle<mirror::Class> J(hs.NewHandle(
151 class_linker_->FindClass(soa.Self(), "LInterfaces$J;", class_loader)));
152 ASSERT_TRUE(I != nullptr);
153 ASSERT_TRUE(J != nullptr);
154
155 Handle<mirror::Class> proxyClass;
156 {
157 std::vector<mirror::Class*> interfaces;
158 interfaces.push_back(I.Get());
159 interfaces.push_back(J.Get());
160 proxyClass = hs.NewHandle(GenerateProxyClass(soa, jclass_loader, "$Proxy1234", interfaces));
161 }
162
163 ASSERT_TRUE(proxyClass != nullptr);
164 ASSERT_TRUE(proxyClass->IsProxyClass());
165 ASSERT_TRUE(proxyClass->IsInitialized());
166
167 EXPECT_TRUE(proxyClass->GetIFieldsPtr() == nullptr);
168
169 LengthPrefixedArray<ArtField>* static_fields = proxyClass->GetSFieldsPtr();
170 ASSERT_TRUE(static_fields != nullptr);
171 ASSERT_EQ(2u, proxyClass->NumStaticFields());
172
173 Handle<mirror::Class> interfacesFieldClass(
174 hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[Ljava/lang/Class;")));
175 ASSERT_TRUE(interfacesFieldClass != nullptr);
176 Handle<mirror::Class> throwsFieldClass(
177 hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[[Ljava/lang/Class;")));
178 ASSERT_TRUE(throwsFieldClass != nullptr);
179
180 // Test "Class[] interfaces" field.
181 ArtField* field = &static_fields->At(0);
182 EXPECT_STREQ("interfaces", field->GetName());
183 EXPECT_STREQ("[Ljava/lang/Class;", field->GetTypeDescriptor());
184 EXPECT_OBJ_PTR_EQ(interfacesFieldClass.Get(), field->GetType<true>());
185 std::string temp;
186 EXPECT_STREQ("L$Proxy1234;", field->GetDeclaringClass()->GetDescriptor(&temp));
187 EXPECT_FALSE(field->IsPrimitiveType());
188
189 // Test "Class[][] throws" field.
190 field = &static_fields->At(1);
191 EXPECT_STREQ("throws", field->GetName());
192 EXPECT_STREQ("[[Ljava/lang/Class;", field->GetTypeDescriptor());
193 EXPECT_OBJ_PTR_EQ(throwsFieldClass.Get(), field->GetType<true>());
194 EXPECT_STREQ("L$Proxy1234;", field->GetDeclaringClass()->GetDescriptor(&temp));
195 EXPECT_FALSE(field->IsPrimitiveType());
196 }
197
198 // Creates two proxy classes and check the art/mirror fields of their static fields.
TEST_F(ProxyTest,CheckArtMirrorFieldsOfProxyStaticFields)199 TEST_F(ProxyTest, CheckArtMirrorFieldsOfProxyStaticFields) {
200 ScopedObjectAccess soa(Thread::Current());
201 jobject jclass_loader = LoadDex("Interfaces");
202 StackHandleScope<7> hs(soa.Self());
203
204 Handle<mirror::Class> proxyClass0;
205 Handle<mirror::Class> proxyClass1;
206 {
207 std::vector<mirror::Class*> interfaces;
208 proxyClass0 = hs.NewHandle(GenerateProxyClass(soa, jclass_loader, "$Proxy0", interfaces));
209 proxyClass1 = hs.NewHandle(GenerateProxyClass(soa, jclass_loader, "$Proxy1", interfaces));
210 }
211
212 ASSERT_TRUE(proxyClass0 != nullptr);
213 ASSERT_TRUE(proxyClass0->IsProxyClass());
214 ASSERT_TRUE(proxyClass0->IsInitialized());
215 ASSERT_TRUE(proxyClass1 != nullptr);
216 ASSERT_TRUE(proxyClass1->IsProxyClass());
217 ASSERT_TRUE(proxyClass1->IsInitialized());
218
219 LengthPrefixedArray<ArtField>* static_fields0 = proxyClass0->GetSFieldsPtr();
220 ASSERT_TRUE(static_fields0 != nullptr);
221 ASSERT_EQ(2u, static_fields0->size());
222 LengthPrefixedArray<ArtField>* static_fields1 = proxyClass1->GetSFieldsPtr();
223 ASSERT_TRUE(static_fields1 != nullptr);
224 ASSERT_EQ(2u, static_fields1->size());
225
226 EXPECT_OBJ_PTR_EQ(static_fields0->At(0).GetDeclaringClass(), proxyClass0.Get());
227 EXPECT_OBJ_PTR_EQ(static_fields0->At(1).GetDeclaringClass(), proxyClass0.Get());
228 EXPECT_OBJ_PTR_EQ(static_fields1->At(0).GetDeclaringClass(), proxyClass1.Get());
229 EXPECT_OBJ_PTR_EQ(static_fields1->At(1).GetDeclaringClass(), proxyClass1.Get());
230
231 ASSERT_EQ(Runtime::Current()->GetClassLinker()->GetImagePointerSize(), kRuntimePointerSize);
232 ASSERT_FALSE(Runtime::Current()->IsActiveTransaction());
233 Handle<mirror::Field> field00 =
234 hs.NewHandle(mirror::Field::CreateFromArtField<kRuntimePointerSize, false>(
235 soa.Self(), &static_fields0->At(0), true));
236 Handle<mirror::Field> field01 =
237 hs.NewHandle(mirror::Field::CreateFromArtField<kRuntimePointerSize, false>(
238 soa.Self(), &static_fields0->At(1), true));
239 Handle<mirror::Field> field10 =
240 hs.NewHandle(mirror::Field::CreateFromArtField<kRuntimePointerSize, false>(
241 soa.Self(), &static_fields1->At(0), true));
242 Handle<mirror::Field> field11 =
243 hs.NewHandle(mirror::Field::CreateFromArtField<kRuntimePointerSize, false>(
244 soa.Self(), &static_fields1->At(1), true));
245 EXPECT_EQ(field00->GetArtField(), &static_fields0->At(0));
246 EXPECT_EQ(field01->GetArtField(), &static_fields0->At(1));
247 EXPECT_EQ(field10->GetArtField(), &static_fields1->At(0));
248 EXPECT_EQ(field11->GetArtField(), &static_fields1->At(1));
249 }
250
251 } // namespace art
252