proxy_test.cc revision 95b4c65da93500cdbdcaa3e01010771ef3f466f1 
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 "common_compiler_test.h"
21#include "field_helper.h"
22#include "mirror/art_field-inl.h"
23#include "scoped_thread_state_change.h"
24
25namespace art {
26
27class ProxyTest : public CommonCompilerTest {
28 public:
29  // Generate a proxy class with the given name and interfaces. This is a simplification from what
30  // libcore does to fit to our test needs. We do not check for duplicated interfaces or methods and
31  // we do not declare exceptions.
32  mirror::Class* GenerateProxyClass(ScopedObjectAccess& soa, jobject jclass_loader,
33                                    const char* className,
34                                    const std::vector<mirror::Class*>& interfaces)
35      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
36    mirror::Class* javaLangObject = class_linker_->FindSystemClass(soa.Self(), "Ljava/lang/Object;");
37    CHECK(javaLangObject != nullptr);
38
39    jclass javaLangClass = soa.AddLocalReference<jclass>(mirror::Class::GetJavaLangClass());
40
41    // Builds the interfaces array.
42    jobjectArray proxyClassInterfaces = soa.Env()->NewObjectArray(interfaces.size(), javaLangClass,
43                                                                  nullptr);
44    soa.Self()->AssertNoPendingException();
45    for (size_t i = 0; i < interfaces.size(); ++i) {
46      soa.Env()->SetObjectArrayElement(proxyClassInterfaces, i,
47                                       soa.AddLocalReference<jclass>(interfaces[i]));
48    }
49
50    // Builds the method array.
51    jsize methods_count = 3;  // Object.equals, Object.hashCode and Object.toString.
52    for (mirror::Class* interface : interfaces) {
53      mirror::ObjectArray<mirror::ArtMethod>* virtual_methods = interface->GetVirtualMethods();
54      methods_count += (virtual_methods == nullptr) ? 0 : virtual_methods->GetLength();
55    }
56    jclass javaLangReflectArtMethod =
57        soa.AddLocalReference<jclass>(mirror::ArtMethod::GetJavaLangReflectArtMethod());
58    jobjectArray proxyClassMethods = soa.Env()->NewObjectArray(methods_count,
59                                                               javaLangReflectArtMethod, nullptr);
60    soa.Self()->AssertNoPendingException();
61
62    // Fill the method array
63    mirror::ArtMethod* equalsMethod = javaLangObject->FindDeclaredVirtualMethod("equals",
64                                                                                "(Ljava/lang/Object;)Z");
65    mirror::ArtMethod* hashCodeMethod = javaLangObject->FindDeclaredVirtualMethod("hashCode",
66                                                                                  "()I");
67    mirror::ArtMethod* toStringMethod = javaLangObject->FindDeclaredVirtualMethod("toString",
68                                                                                  "()Ljava/lang/String;");
69    CHECK(equalsMethod != nullptr);
70    CHECK(hashCodeMethod != nullptr);
71    CHECK(toStringMethod != nullptr);
72
73    jsize array_index = 0;
74    // Adds Object methods.
75    soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
76                                     soa.AddLocalReference<jobject>(equalsMethod));
77    soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
78                                     soa.AddLocalReference<jobject>(hashCodeMethod));
79    soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
80                                     soa.AddLocalReference<jobject>(toStringMethod));
81
82    // Now adds all interfaces virtual methods.
83    for (mirror::Class* interface : interfaces) {
84      mirror::ObjectArray<mirror::ArtMethod>* virtual_methods = interface->GetVirtualMethods();
85      if (virtual_methods != nullptr) {
86        for (int32_t mth_index = 0; mth_index < virtual_methods->GetLength(); ++mth_index) {
87          mirror::ArtMethod* method = virtual_methods->Get(mth_index);
88          soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
89                                           soa.AddLocalReference<jobject>(method));
90        }
91      }
92    }
93    CHECK_EQ(array_index, methods_count);
94
95    // Builds an empty exception array.
96    jobjectArray proxyClassThrows = soa.Env()->NewObjectArray(0, javaLangClass, nullptr);
97    soa.Self()->AssertNoPendingException();
98
99    mirror::Class* proxyClass = class_linker_->CreateProxyClass(soa,
100                                                                soa.Env()->NewStringUTF(className),
101                                                                proxyClassInterfaces, jclass_loader,
102                                                                proxyClassMethods, proxyClassThrows);
103    soa.Self()->AssertNoPendingException();
104    return proxyClass;
105  }
106};
107
108// Creates a proxy class and check ClassHelper works correctly.
109TEST_F(ProxyTest, ProxyClassHelper) {
110  ScopedObjectAccess soa(Thread::Current());
111  jobject jclass_loader = LoadDex("Interfaces");
112  StackHandleScope<4> hs(soa.Self());
113  Handle<mirror::ClassLoader> class_loader(
114      hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader)));
115
116  Handle<mirror::Class> I(hs.NewHandle(
117      class_linker_->FindClass(soa.Self(), "LInterfaces$I;", class_loader)));
118  Handle<mirror::Class> J(hs.NewHandle(
119      class_linker_->FindClass(soa.Self(), "LInterfaces$J;", class_loader)));
120  ASSERT_TRUE(I.Get() != nullptr);
121  ASSERT_TRUE(J.Get() != nullptr);
122
123  std::vector<mirror::Class*> interfaces;
124  interfaces.push_back(I.Get());
125  interfaces.push_back(J.Get());
126  Handle<mirror::Class> proxy_class(hs.NewHandle(
127      GenerateProxyClass(soa, jclass_loader, "$Proxy1234", interfaces)));
128  interfaces.clear();  // Don't least possibly stale objects in the array as good practice.
129  ASSERT_TRUE(proxy_class.Get() != nullptr);
130  ASSERT_TRUE(proxy_class->IsProxyClass());
131  ASSERT_TRUE(proxy_class->IsInitialized());
132
133  EXPECT_EQ(2U, proxy_class->NumDirectInterfaces());  // Interfaces$I and Interfaces$J.
134  EXPECT_EQ(I.Get(), mirror::Class::GetDirectInterface(soa.Self(), proxy_class, 0));
135  EXPECT_EQ(J.Get(), mirror::Class::GetDirectInterface(soa.Self(), proxy_class, 1));
136  std::string temp;
137  const char* proxy_class_descriptor = proxy_class->GetDescriptor(&temp);
138  EXPECT_STREQ("L$Proxy1234;", proxy_class_descriptor);
139  EXPECT_EQ(nullptr, proxy_class->GetSourceFile());
140}
141
142// Creates a proxy class and check FieldHelper works correctly.
143TEST_F(ProxyTest, ProxyFieldHelper) {
144  ScopedObjectAccess soa(Thread::Current());
145  jobject jclass_loader = LoadDex("Interfaces");
146  StackHandleScope<9> hs(soa.Self());
147  Handle<mirror::ClassLoader> class_loader(
148      hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader)));
149
150  Handle<mirror::Class> I(hs.NewHandle(
151      class_linker_->FindClass(soa.Self(), "LInterfaces$I;", class_loader)));
152  Handle<mirror::Class> J(hs.NewHandle(
153      class_linker_->FindClass(soa.Self(), "LInterfaces$J;", class_loader)));
154  ASSERT_TRUE(I.Get() != nullptr);
155  ASSERT_TRUE(J.Get() != nullptr);
156
157  Handle<mirror::Class> proxyClass;
158  {
159    std::vector<mirror::Class*> interfaces;
160    interfaces.push_back(I.Get());
161    interfaces.push_back(J.Get());
162    proxyClass = hs.NewHandle(GenerateProxyClass(soa, jclass_loader, "$Proxy1234", interfaces));
163  }
164
165  ASSERT_TRUE(proxyClass.Get() != nullptr);
166  ASSERT_TRUE(proxyClass->IsProxyClass());
167  ASSERT_TRUE(proxyClass->IsInitialized());
168
169  Handle<mirror::ObjectArray<mirror::ArtField>> instance_fields(
170      hs.NewHandle(proxyClass->GetIFields()));
171  EXPECT_TRUE(instance_fields.Get() == nullptr);
172
173  Handle<mirror::ObjectArray<mirror::ArtField>> static_fields(
174      hs.NewHandle(proxyClass->GetSFields()));
175  ASSERT_TRUE(static_fields.Get() != nullptr);
176  ASSERT_EQ(2, static_fields->GetLength());
177
178  Handle<mirror::Class> interfacesFieldClass(
179      hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[Ljava/lang/Class;")));
180  ASSERT_TRUE(interfacesFieldClass.Get() != nullptr);
181  Handle<mirror::Class> throwsFieldClass(
182      hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[[Ljava/lang/Class;")));
183  ASSERT_TRUE(throwsFieldClass.Get() != nullptr);
184
185  // Test "Class[] interfaces" field.
186  FieldHelper fh(hs.NewHandle(static_fields->Get(0)));
187  EXPECT_EQ("interfaces", std::string(fh.GetField()->GetName()));
188  EXPECT_EQ("[Ljava/lang/Class;", std::string(fh.GetField()->GetTypeDescriptor()));
189  EXPECT_EQ(interfacesFieldClass.Get(), fh.GetType());
190  EXPECT_EQ("L$Proxy1234;", std::string(fh.GetDeclaringClassDescriptor()));
191  EXPECT_FALSE(fh.GetField()->IsPrimitiveType());
192
193  // Test "Class[][] throws" field.
194  fh.ChangeField(static_fields->Get(1));
195  EXPECT_EQ("throws", std::string(fh.GetField()->GetName()));
196  EXPECT_EQ("[[Ljava/lang/Class;", std::string(fh.GetField()->GetTypeDescriptor()));
197  EXPECT_EQ(throwsFieldClass.Get(), fh.GetType());
198  EXPECT_EQ("L$Proxy1234;", std::string(fh.GetDeclaringClassDescriptor()));
199  EXPECT_FALSE(fh.GetField()->IsPrimitiveType());
200}
201
202}  // namespace art
203