proxy_test.cc revision 3d21bdf8894e780d349c481e5c9e29fe1556051c 
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 "class_linker-inl.h"
22#include "common_compiler_test.h"
23#include "mirror/field-inl.h"
24#include "mirror/method.h"
25#include "scoped_thread_state_change.h"
26
27namespace art {
28
29class ProxyTest : public CommonCompilerTest {
30 public:
31  // Generate a proxy class with the given name and interfaces. This is a simplification from what
32  // libcore does to fit to our test needs. We do not check for duplicated interfaces or methods and
33  // we do not declare exceptions.
34  mirror::Class* GenerateProxyClass(ScopedObjectAccess& soa, jobject jclass_loader,
35                                    const char* className,
36                                    const std::vector<mirror::Class*>& interfaces)
37      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
38    mirror::Class* javaLangObject = class_linker_->FindSystemClass(soa.Self(), "Ljava/lang/Object;");
39    CHECK(javaLangObject != nullptr);
40
41    jclass javaLangClass = soa.AddLocalReference<jclass>(mirror::Class::GetJavaLangClass());
42
43    // Builds the interfaces array.
44    jobjectArray proxyClassInterfaces = soa.Env()->NewObjectArray(interfaces.size(), javaLangClass,
45                                                                  nullptr);
46    soa.Self()->AssertNoPendingException();
47    for (size_t i = 0; i < interfaces.size(); ++i) {
48      soa.Env()->SetObjectArrayElement(proxyClassInterfaces, i,
49                                       soa.AddLocalReference<jclass>(interfaces[i]));
50    }
51
52    // Builds the method array.
53    jsize methods_count = 3;  // Object.equals, Object.hashCode and Object.toString.
54    for (mirror::Class* interface : interfaces) {
55      methods_count += interface->NumVirtualMethods();
56    }
57    jobjectArray proxyClassMethods = soa.Env()->NewObjectArray(
58        methods_count, soa.AddLocalReference<jclass>(mirror::Method::StaticClass()), nullptr);
59    soa.Self()->AssertNoPendingException();
60
61    jsize array_index = 0;
62    // Fill the method array
63    ArtMethod* method = javaLangObject->FindDeclaredVirtualMethod(
64        "equals", "(Ljava/lang/Object;)Z", sizeof(void*));
65    CHECK(method != nullptr);
66    soa.Env()->SetObjectArrayElement(
67        proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
68            mirror::Method::CreateFromArtMethod(soa.Self(), method)));
69    method = javaLangObject->FindDeclaredVirtualMethod("hashCode", "()I", sizeof(void*));
70    CHECK(method != nullptr);
71    soa.Env()->SetObjectArrayElement(
72        proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
73            mirror::Method::CreateFromArtMethod(soa.Self(), method)));
74    method = javaLangObject->FindDeclaredVirtualMethod(
75        "toString", "()Ljava/lang/String;", sizeof(void*));
76    CHECK(method != nullptr);
77    soa.Env()->SetObjectArrayElement(
78        proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
79            mirror::Method::CreateFromArtMethod(soa.Self(), method)));
80    // Now adds all interfaces virtual methods.
81    for (mirror::Class* interface : interfaces) {
82      for (auto& m : interface->GetVirtualMethods(sizeof(void*))) {
83        soa.Env()->SetObjectArrayElement(
84            proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
85                mirror::Method::CreateFromArtMethod(soa.Self(), &m)));
86      }
87    }
88    CHECK_EQ(array_index, methods_count);
89
90    // Builds an empty exception array.
91    jobjectArray proxyClassThrows = soa.Env()->NewObjectArray(0, javaLangClass, nullptr);
92    soa.Self()->AssertNoPendingException();
93
94    mirror::Class* proxyClass = class_linker_->CreateProxyClass(
95        soa, soa.Env()->NewStringUTF(className), proxyClassInterfaces, jclass_loader,
96        proxyClassMethods, proxyClassThrows);
97    soa.Self()->AssertNoPendingException();
98    return proxyClass;
99  }
100};
101
102// Creates a proxy class and check ClassHelper works correctly.
103TEST_F(ProxyTest, ProxyClassHelper) {
104  ScopedObjectAccess soa(Thread::Current());
105  jobject jclass_loader = LoadDex("Interfaces");
106  StackHandleScope<4> hs(soa.Self());
107  Handle<mirror::ClassLoader> class_loader(
108      hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader)));
109
110  Handle<mirror::Class> I(hs.NewHandle(
111      class_linker_->FindClass(soa.Self(), "LInterfaces$I;", class_loader)));
112  Handle<mirror::Class> J(hs.NewHandle(
113      class_linker_->FindClass(soa.Self(), "LInterfaces$J;", class_loader)));
114  ASSERT_TRUE(I.Get() != nullptr);
115  ASSERT_TRUE(J.Get() != nullptr);
116
117  std::vector<mirror::Class*> interfaces;
118  interfaces.push_back(I.Get());
119  interfaces.push_back(J.Get());
120  Handle<mirror::Class> proxy_class(hs.NewHandle(
121      GenerateProxyClass(soa, jclass_loader, "$Proxy1234", interfaces)));
122  interfaces.clear();  // Don't least possibly stale objects in the array as good practice.
123  ASSERT_TRUE(proxy_class.Get() != nullptr);
124  ASSERT_TRUE(proxy_class->IsProxyClass());
125  ASSERT_TRUE(proxy_class->IsInitialized());
126
127  EXPECT_EQ(2U, proxy_class->NumDirectInterfaces());  // Interfaces$I and Interfaces$J.
128  EXPECT_EQ(I.Get(), mirror::Class::GetDirectInterface(soa.Self(), proxy_class, 0));
129  EXPECT_EQ(J.Get(), mirror::Class::GetDirectInterface(soa.Self(), proxy_class, 1));
130  std::string temp;
131  const char* proxy_class_descriptor = proxy_class->GetDescriptor(&temp);
132  EXPECT_STREQ("L$Proxy1234;", proxy_class_descriptor);
133  EXPECT_EQ(nullptr, proxy_class->GetSourceFile());
134}
135
136// Creates a proxy class and check FieldHelper works correctly.
137TEST_F(ProxyTest, ProxyFieldHelper) {
138  ScopedObjectAccess soa(Thread::Current());
139  jobject jclass_loader = LoadDex("Interfaces");
140  StackHandleScope<9> hs(soa.Self());
141  Handle<mirror::ClassLoader> class_loader(
142      hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader)));
143
144  Handle<mirror::Class> I(hs.NewHandle(
145      class_linker_->FindClass(soa.Self(), "LInterfaces$I;", class_loader)));
146  Handle<mirror::Class> J(hs.NewHandle(
147      class_linker_->FindClass(soa.Self(), "LInterfaces$J;", class_loader)));
148  ASSERT_TRUE(I.Get() != nullptr);
149  ASSERT_TRUE(J.Get() != nullptr);
150
151  Handle<mirror::Class> proxyClass;
152  {
153    std::vector<mirror::Class*> interfaces;
154    interfaces.push_back(I.Get());
155    interfaces.push_back(J.Get());
156    proxyClass = hs.NewHandle(GenerateProxyClass(soa, jclass_loader, "$Proxy1234", interfaces));
157  }
158
159  ASSERT_TRUE(proxyClass.Get() != nullptr);
160  ASSERT_TRUE(proxyClass->IsProxyClass());
161  ASSERT_TRUE(proxyClass->IsInitialized());
162
163  ArtField* instance_fields = proxyClass->GetIFields();
164  EXPECT_TRUE(instance_fields == nullptr);
165
166  ArtField* static_fields = proxyClass->GetSFields();
167  ASSERT_TRUE(static_fields != nullptr);
168  ASSERT_EQ(2u, proxyClass->NumStaticFields());
169
170  Handle<mirror::Class> interfacesFieldClass(
171      hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[Ljava/lang/Class;")));
172  ASSERT_TRUE(interfacesFieldClass.Get() != nullptr);
173  Handle<mirror::Class> throwsFieldClass(
174      hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[[Ljava/lang/Class;")));
175  ASSERT_TRUE(throwsFieldClass.Get() != nullptr);
176
177  // Test "Class[] interfaces" field.
178  ArtField* field = &static_fields[0];
179  EXPECT_STREQ("interfaces", field->GetName());
180  EXPECT_STREQ("[Ljava/lang/Class;", field->GetTypeDescriptor());
181  EXPECT_EQ(interfacesFieldClass.Get(), field->GetType<true>());
182  std::string temp;
183  EXPECT_STREQ("L$Proxy1234;", field->GetDeclaringClass()->GetDescriptor(&temp));
184  EXPECT_FALSE(field->IsPrimitiveType());
185
186  // Test "Class[][] throws" field.
187  field = &static_fields[1];
188  EXPECT_STREQ("throws", field->GetName());
189  EXPECT_STREQ("[[Ljava/lang/Class;", field->GetTypeDescriptor());
190  EXPECT_EQ(throwsFieldClass.Get(), field->GetType<true>());
191  EXPECT_STREQ("L$Proxy1234;", field->GetDeclaringClass()->GetDescriptor(&temp));
192  EXPECT_FALSE(field->IsPrimitiveType());
193}
194
195// Creates two proxy classes and check the art/mirror fields of their static fields.
196TEST_F(ProxyTest, CheckArtMirrorFieldsOfProxyStaticFields) {
197  ScopedObjectAccess soa(Thread::Current());
198  jobject jclass_loader = LoadDex("Interfaces");
199  StackHandleScope<7> hs(soa.Self());
200  Handle<mirror::ClassLoader> class_loader(
201      hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader)));
202
203  Handle<mirror::Class> proxyClass0;
204  Handle<mirror::Class> proxyClass1;
205  {
206    std::vector<mirror::Class*> interfaces;
207    proxyClass0 = hs.NewHandle(GenerateProxyClass(soa, jclass_loader, "$Proxy0", interfaces));
208    proxyClass1 = hs.NewHandle(GenerateProxyClass(soa, jclass_loader, "$Proxy1", interfaces));
209  }
210
211  ASSERT_TRUE(proxyClass0.Get() != nullptr);
212  ASSERT_TRUE(proxyClass0->IsProxyClass());
213  ASSERT_TRUE(proxyClass0->IsInitialized());
214  ASSERT_TRUE(proxyClass1.Get() != nullptr);
215  ASSERT_TRUE(proxyClass1->IsProxyClass());
216  ASSERT_TRUE(proxyClass1->IsInitialized());
217
218  ArtField* static_fields0 = proxyClass0->GetSFields();
219  ASSERT_TRUE(static_fields0 != nullptr);
220  ASSERT_EQ(2u, proxyClass0->NumStaticFields());
221  ArtField* static_fields1 = proxyClass1->GetSFields();
222  ASSERT_TRUE(static_fields1 != nullptr);
223  ASSERT_EQ(2u, proxyClass1->NumStaticFields());
224
225  EXPECT_EQ(static_fields0[0].GetDeclaringClass(), proxyClass0.Get());
226  EXPECT_EQ(static_fields0[1].GetDeclaringClass(), proxyClass0.Get());
227  EXPECT_EQ(static_fields1[0].GetDeclaringClass(), proxyClass1.Get());
228  EXPECT_EQ(static_fields1[1].GetDeclaringClass(), proxyClass1.Get());
229
230  Handle<mirror::Field> field00 =
231      hs.NewHandle(mirror::Field::CreateFromArtField(soa.Self(), &static_fields0[0], true));
232  Handle<mirror::Field> field01 =
233      hs.NewHandle(mirror::Field::CreateFromArtField(soa.Self(), &static_fields0[1], true));
234  Handle<mirror::Field> field10 =
235      hs.NewHandle(mirror::Field::CreateFromArtField(soa.Self(), &static_fields1[0], true));
236  Handle<mirror::Field> field11 =
237      hs.NewHandle(mirror::Field::CreateFromArtField(soa.Self(), &static_fields1[1], true));
238  EXPECT_EQ(field00->GetArtField(), &static_fields0[0]);
239  EXPECT_EQ(field01->GetArtField(), &static_fields0[1]);
240  EXPECT_EQ(field10->GetArtField(), &static_fields1[0]);
241  EXPECT_EQ(field11->GetArtField(), &static_fields1[1]);
242}
243
244}  // namespace art
245