proxy_test.cc revision daaf3265806eb2eadb2e03302bd68022fab5ca28 
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 "mirror/art_field-inl.h"
22#include "scoped_thread_state_change.h"
23
24namespace art {
25
26class ProxyTest : public CommonCompilerTest {
27 public:
28  // Generate a proxy class with the given name and interfaces. This is a simplification from what
29  // libcore does to fit to our test needs. We do not check for duplicated interfaces or methods and
30  // we do not declare exceptions.
31  mirror::Class* GenerateProxyClass(ScopedObjectAccess& soa, jobject jclass_loader,
32                                    const char* className,
33                                    const std::vector<mirror::Class*>& interfaces)
34      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
35    mirror::Class* javaLangObject = class_linker_->FindSystemClass(soa.Self(), "Ljava/lang/Object;");
36    CHECK(javaLangObject != nullptr);
37
38    jclass javaLangClass = soa.AddLocalReference<jclass>(mirror::Class::GetJavaLangClass());
39
40    // Builds the interfaces array.
41    jobjectArray proxyClassInterfaces = soa.Env()->NewObjectArray(interfaces.size(), javaLangClass,
42                                                                  nullptr);
43    soa.Self()->AssertNoPendingException();
44    for (size_t i = 0; i < interfaces.size(); ++i) {
45      soa.Env()->SetObjectArrayElement(proxyClassInterfaces, i,
46                                       soa.AddLocalReference<jclass>(interfaces[i]));
47    }
48
49    // Builds the method array.
50    jsize methods_count = 3;  // Object.equals, Object.hashCode and Object.toString.
51    for (mirror::Class* interface : interfaces) {
52      mirror::ObjectArray<mirror::ArtMethod>* virtual_methods = interface->GetVirtualMethods();
53      methods_count += (virtual_methods == nullptr) ? 0 : virtual_methods->GetLength();
54    }
55    jclass javaLangReflectArtMethod =
56        soa.AddLocalReference<jclass>(mirror::ArtMethod::GetJavaLangReflectArtMethod());
57    jobjectArray proxyClassMethods = soa.Env()->NewObjectArray(methods_count,
58                                                               javaLangReflectArtMethod, nullptr);
59    soa.Self()->AssertNoPendingException();
60
61    // Fill the method array
62    mirror::ArtMethod* equalsMethod = javaLangObject->FindDeclaredVirtualMethod("equals",
63                                                                                "(Ljava/lang/Object;)Z");
64    mirror::ArtMethod* hashCodeMethod = javaLangObject->FindDeclaredVirtualMethod("hashCode",
65                                                                                  "()I");
66    mirror::ArtMethod* toStringMethod = javaLangObject->FindDeclaredVirtualMethod("toString",
67                                                                                  "()Ljava/lang/String;");
68    CHECK(equalsMethod != nullptr);
69    CHECK(hashCodeMethod != nullptr);
70    CHECK(toStringMethod != nullptr);
71
72    jsize array_index = 0;
73    // Adds Object methods.
74    soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
75                                     soa.AddLocalReference<jobject>(equalsMethod));
76    soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
77                                     soa.AddLocalReference<jobject>(hashCodeMethod));
78    soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
79                                     soa.AddLocalReference<jobject>(toStringMethod));
80
81    // Now adds all interfaces virtual methods.
82    for (mirror::Class* interface : interfaces) {
83      mirror::ObjectArray<mirror::ArtMethod>* virtual_methods = interface->GetVirtualMethods();
84      if (virtual_methods != nullptr) {
85        for (int32_t mth_index = 0; mth_index < virtual_methods->GetLength(); ++mth_index) {
86          mirror::ArtMethod* method = virtual_methods->Get(mth_index);
87          soa.Env()->SetObjectArrayElement(proxyClassMethods, array_index++,
88                                           soa.AddLocalReference<jobject>(method));
89        }
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(soa,
99                                                                soa.Env()->NewStringUTF(className),
100                                                                proxyClassInterfaces, jclass_loader,
101                                                                proxyClassMethods, proxyClassThrows);
102    soa.Self()->AssertNoPendingException();
103    return proxyClass;
104  }
105};
106
107// Creates a proxy class and check ClassHelper works correctly.
108TEST_F(ProxyTest, ProxyClassHelper) {
109  ScopedObjectAccess soa(Thread::Current());
110  jobject jclass_loader = LoadDex("Interfaces");
111  StackHandleScope<4> hs(soa.Self());
112  Handle<mirror::ClassLoader> class_loader(
113      hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader)));
114
115  Handle<mirror::Class> I(hs.NewHandle(
116      class_linker_->FindClass(soa.Self(), "LInterfaces$I;", class_loader)));
117  Handle<mirror::Class> J(hs.NewHandle(
118      class_linker_->FindClass(soa.Self(), "LInterfaces$J;", class_loader)));
119  ASSERT_TRUE(I.Get() != nullptr);
120  ASSERT_TRUE(J.Get() != nullptr);
121
122  std::vector<mirror::Class*> interfaces;
123  interfaces.push_back(I.Get());
124  interfaces.push_back(J.Get());
125  Handle<mirror::Class> proxy_class(hs.NewHandle(
126      GenerateProxyClass(soa, jclass_loader, "$Proxy1234", interfaces)));
127  interfaces.clear();  // Don't least possibly stale objects in the array as good practice.
128  ASSERT_TRUE(proxy_class.Get() != nullptr);
129  ASSERT_TRUE(proxy_class->IsProxyClass());
130  ASSERT_TRUE(proxy_class->IsInitialized());
131
132  EXPECT_EQ(2U, proxy_class->NumDirectInterfaces());  // Interfaces$I and Interfaces$J.
133  EXPECT_EQ(I.Get(), mirror::Class::GetDirectInterface(soa.Self(), proxy_class, 0));
134  EXPECT_EQ(J.Get(), mirror::Class::GetDirectInterface(soa.Self(), proxy_class, 1));
135  std::string temp;
136  const char* proxy_class_descriptor = proxy_class->GetDescriptor(&temp);
137  EXPECT_STREQ("L$Proxy1234;", proxy_class_descriptor);
138  EXPECT_EQ(nullptr, proxy_class->GetSourceFile());
139}
140
141// Creates a proxy class and check FieldHelper works correctly.
142TEST_F(ProxyTest, ProxyFieldHelper) {
143  ScopedObjectAccess soa(Thread::Current());
144  jobject jclass_loader = LoadDex("Interfaces");
145  StackHandleScope<9> hs(soa.Self());
146  Handle<mirror::ClassLoader> class_loader(
147      hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader)));
148
149  Handle<mirror::Class> I(hs.NewHandle(
150      class_linker_->FindClass(soa.Self(), "LInterfaces$I;", class_loader)));
151  Handle<mirror::Class> J(hs.NewHandle(
152      class_linker_->FindClass(soa.Self(), "LInterfaces$J;", class_loader)));
153  ASSERT_TRUE(I.Get() != nullptr);
154  ASSERT_TRUE(J.Get() != nullptr);
155
156  Handle<mirror::Class> proxyClass;
157  {
158    std::vector<mirror::Class*> interfaces;
159    interfaces.push_back(I.Get());
160    interfaces.push_back(J.Get());
161    proxyClass = hs.NewHandle(GenerateProxyClass(soa, jclass_loader, "$Proxy1234", interfaces));
162  }
163
164  ASSERT_TRUE(proxyClass.Get() != nullptr);
165  ASSERT_TRUE(proxyClass->IsProxyClass());
166  ASSERT_TRUE(proxyClass->IsInitialized());
167
168  Handle<mirror::ObjectArray<mirror::ArtField>> instance_fields(
169      hs.NewHandle(proxyClass->GetIFields()));
170  EXPECT_TRUE(instance_fields.Get() == nullptr);
171
172  Handle<mirror::ObjectArray<mirror::ArtField>> static_fields(
173      hs.NewHandle(proxyClass->GetSFields()));
174  ASSERT_TRUE(static_fields.Get() != nullptr);
175  ASSERT_EQ(2, static_fields->GetLength());
176
177  Handle<mirror::Class> interfacesFieldClass(
178      hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[Ljava/lang/Class;")));
179  ASSERT_TRUE(interfacesFieldClass.Get() != nullptr);
180  Handle<mirror::Class> throwsFieldClass(
181      hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[[Ljava/lang/Class;")));
182  ASSERT_TRUE(throwsFieldClass.Get() != nullptr);
183
184  // Test "Class[] interfaces" field.
185  MutableHandle<mirror::ArtField> fhandle = hs.NewHandle(static_fields->Get(0));
186  EXPECT_EQ("interfaces", std::string(fhandle->GetName()));
187  EXPECT_EQ("[Ljava/lang/Class;", std::string(fhandle->GetTypeDescriptor()));
188  EXPECT_EQ(interfacesFieldClass.Get(), fhandle->GetType<true>());
189  std::string temp;
190  EXPECT_EQ("L$Proxy1234;", std::string(fhandle->GetDeclaringClass()->GetDescriptor(&temp)));
191  EXPECT_FALSE(fhandle->IsPrimitiveType());
192
193  // Test "Class[][] throws" field.
194  fhandle.Assign(static_fields->Get(1));
195  EXPECT_EQ("throws", std::string(fhandle->GetName()));
196  EXPECT_EQ("[[Ljava/lang/Class;", std::string(fhandle->GetTypeDescriptor()));
197  EXPECT_EQ(throwsFieldClass.Get(), fhandle->GetType<true>());
198  EXPECT_EQ("L$Proxy1234;", std::string(fhandle->GetDeclaringClass()->GetDescriptor(&temp)));
199  EXPECT_FALSE(fhandle->IsPrimitiveType());
200}
201
202}  // namespace art
203