proxy_test.cc revision 4206eb5d86d3a2406361e59b2018152b2485cced 
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 "common_compiler_test.h"
18#include "mirror/art_field-inl.h"
19
20#include <jni.h>
21#include <vector>
22
23namespace art {
24
25class ProxyTest : public CommonCompilerTest {
26 public:
27  // Generate a proxy class with the given name and interfaces. This is a simplification from what
28  // libcore does to fit to our test needs. We do not check for duplicated interfaces or methods and
29  // we do not declare exceptions.
30  mirror::Class* GenerateProxyClass(ScopedObjectAccess& soa, jobject jclass_loader,
31                                    const char* className,
32                                    const std::vector<mirror::Class*>& interfaces)
33      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
34    mirror::Class* javaLangObject = class_linker_->FindSystemClass(soa.Self(), "Ljava/lang/Object;");
35    CHECK(javaLangObject != nullptr);
36
37    jclass javaLangClass = soa.AddLocalReference<jclass>(mirror::Class::GetJavaLangClass());
38
39    // Builds the interfaces array.
40    jobjectArray proxyClassInterfaces = soa.Env()->NewObjectArray(interfaces.size(), javaLangClass,
41                                                                  nullptr);
42    soa.Self()->AssertNoPendingException();
43    for (size_t i = 0; i < interfaces.size(); ++i) {
44      soa.Env()->SetObjectArrayElement(proxyClassInterfaces, i,
45                                       soa.AddLocalReference<jclass>(interfaces[i]));
46    }
47
48    // Builds the method array.
49    jsize methods_count = 3;  // Object.equals, Object.hashCode and Object.toString.
50    for (mirror::Class* interface : interfaces) {
51      mirror::ObjectArray<mirror::ArtMethod>* virtual_methods = interface->GetVirtualMethods();
52      methods_count += (virtual_methods == nullptr) ? 0 : virtual_methods->GetLength();
53    }
54    jclass javaLangReflectArtMethod =
55        soa.AddLocalReference<jclass>(mirror::ArtMethod::GetJavaLangReflectArtMethod());
56    jobjectArray proxyClassMethods = soa.Env()->NewObjectArray(methods_count,
57                                                               javaLangReflectArtMethod, nullptr);
58    soa.Self()->AssertNoPendingException();
59
60    // Fill the method array
61    mirror::ArtMethod* equalsMethod = javaLangObject->FindDeclaredVirtualMethod("equals",
62                                                                                "(Ljava/lang/Object;)Z");
63    mirror::ArtMethod* hashCodeMethod = javaLangObject->FindDeclaredVirtualMethod("hashCode",
64                                                                                  "()I");
65    mirror::ArtMethod* toStringMethod = javaLangObject->FindDeclaredVirtualMethod("toString",
66                                                                                  "()Ljava/lang/String;");
67    CHECK(equalsMethod != nullptr);
68    CHECK(hashCodeMethod != nullptr);
69    CHECK(toStringMethod != nullptr);
70
71    jsize array_index = 0;
72    // Adds Object methods.
73    soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
74                                     soa.AddLocalReference<jobject>(equalsMethod));
75    soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
76                                     soa.AddLocalReference<jobject>(hashCodeMethod));
77    soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
78                                     soa.AddLocalReference<jobject>(toStringMethod));
79
80    // Now adds all interfaces virtual methods.
81    for (mirror::Class* interface : interfaces) {
82      mirror::ObjectArray<mirror::ArtMethod>* virtual_methods = interface->GetVirtualMethods();
83      if (virtual_methods != nullptr) {
84        for (int32_t mth_index = 0; mth_index < virtual_methods->GetLength(); ++mth_index) {
85          mirror::ArtMethod* method = virtual_methods->Get(mth_index);
86          soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
87                                           soa.AddLocalReference<jobject>(method));
88        }
89      }
90    }
91    CHECK_EQ(array_index, methods_count);
92
93    // Builds an empty exception array.
94    jobjectArray proxyClassThrows = soa.Env()->NewObjectArray(0, javaLangClass, nullptr);
95    soa.Self()->AssertNoPendingException();
96
97    mirror::Class* proxyClass = class_linker_->CreateProxyClass(soa,
98                                                                soa.Env()->NewStringUTF(className),
99                                                                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.
107TEST_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.Get() != nullptr);
119  ASSERT_TRUE(J.Get() != 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, "$Proxy1234", interfaces)));
126  interfaces.clear();  // Don't least possibly stale objects in the array as good practice.
127  ASSERT_TRUE(proxy_class.Get() != nullptr);
128  ASSERT_TRUE(proxy_class->IsProxyClass());
129  ASSERT_TRUE(proxy_class->IsInitialized());
130
131  EXPECT_EQ(2U, proxy_class->NumDirectInterfaces());  // Interfaces$I and Interfaces$J.
132  EXPECT_EQ(I.Get(), mirror::Class::GetDirectInterface(soa.Self(), proxy_class, 0));
133  EXPECT_EQ(J.Get(), mirror::Class::GetDirectInterface(soa.Self(), proxy_class, 1));
134  std::string proxy_class_descriptor(proxy_class->GetDescriptor());
135  EXPECT_STREQ("L$Proxy1234;", proxy_class_descriptor.c_str());
136  EXPECT_EQ(nullptr, proxy_class->GetSourceFile());
137}
138
139// Creates a proxy class and check FieldHelper works correctly.
140TEST_F(ProxyTest, ProxyFieldHelper) {
141  ScopedObjectAccess soa(Thread::Current());
142  jobject jclass_loader = LoadDex("Interfaces");
143  StackHandleScope<1> hs(soa.Self());
144  Handle<mirror::ClassLoader> class_loader(
145      hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader)));
146
147  mirror::Class* I = class_linker_->FindClass(soa.Self(), "LInterfaces$I;", class_loader);
148  mirror::Class* J = class_linker_->FindClass(soa.Self(), "LInterfaces$J;", class_loader);
149  ASSERT_TRUE(I != nullptr);
150  ASSERT_TRUE(J != nullptr);
151  std::vector<mirror::Class*> interfaces;
152  interfaces.push_back(I);
153  interfaces.push_back(J);
154
155  mirror::Class* proxyClass = GenerateProxyClass(soa, jclass_loader, "$Proxy1234", interfaces);
156  ASSERT_TRUE(proxyClass != nullptr);
157  ASSERT_TRUE(proxyClass->IsProxyClass());
158  ASSERT_TRUE(proxyClass->IsInitialized());
159
160  mirror::ObjectArray<mirror::ArtField>* instance_fields = proxyClass->GetIFields();
161  EXPECT_TRUE(instance_fields == nullptr);
162
163  mirror::ObjectArray<mirror::ArtField>* static_fields = proxyClass->GetSFields();
164  ASSERT_TRUE(static_fields != nullptr);
165  ASSERT_EQ(2, static_fields->GetLength());
166
167  mirror::Class* interfacesFieldClass = class_linker_->FindSystemClass(soa.Self(),
168                                                                       "[Ljava/lang/Class;");
169  ASSERT_TRUE(interfacesFieldClass != nullptr);
170  mirror::Class* throwsFieldClass = class_linker_->FindSystemClass(soa.Self(),
171                                                                   "[[Ljava/lang/Class;");
172  ASSERT_TRUE(throwsFieldClass != nullptr);
173
174  // Test "Class[] interfaces" field.
175  FieldHelper fh(static_fields->Get(0));
176  EXPECT_EQ("interfaces", std::string(fh.GetName()));
177  EXPECT_EQ("[Ljava/lang/Class;", std::string(fh.GetTypeDescriptor()));
178  EXPECT_EQ(interfacesFieldClass, fh.GetType());
179  EXPECT_EQ("L$Proxy1234;", std::string(fh.GetDeclaringClassDescriptor()));
180  EXPECT_FALSE(fh.IsPrimitiveType());
181
182  // Test "Class[][] throws" field.
183  fh.ChangeField(static_fields->Get(1));
184  EXPECT_EQ("throws", std::string(fh.GetName()));
185  EXPECT_EQ("[[Ljava/lang/Class;", std::string(fh.GetTypeDescriptor()));
186  EXPECT_EQ(throwsFieldClass, fh.GetType());
187  EXPECT_EQ("L$Proxy1234;", std::string(fh.GetDeclaringClassDescriptor()));
188  EXPECT_FALSE(fh.IsPrimitiveType());
189}
190
191}  // namespace art
192