1 /*
2 * Copyright (C) 2018 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 #ifndef ART_RUNTIME_PROXY_TEST_H_
18 #define ART_RUNTIME_PROXY_TEST_H_
19
20 #include <jni.h>
21 #include <vector>
22
23 #include "art_method-inl.h"
24 #include "class_linker-inl.h"
25 #include "class_root.h"
26 #include "mirror/class-inl.h"
27 #include "mirror/method.h"
28 #include "obj_ptr-inl.h"
29
30 namespace art {
31 namespace proxy_test {
32
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,ClassLinker * class_linker,const char * className,const std::vector<Handle<mirror::Class>> & interfaces)36 ObjPtr<mirror::Class> GenerateProxyClass(ScopedObjectAccess& soa,
37 jobject jclass_loader,
38 ClassLinker* class_linker,
39 const char* className,
40 const std::vector<Handle<mirror::Class>>& interfaces)
41 REQUIRES_SHARED(Locks::mutator_lock_) {
42 StackHandleScope<1> hs(soa.Self());
43 Handle<mirror::Class> javaLangObject = hs.NewHandle(GetClassRoot<mirror::Object>());
44 CHECK(javaLangObject != nullptr);
45
46 jclass javaLangClass = soa.AddLocalReference<jclass>(GetClassRoot<mirror::Class>());
47
48 // Builds the interfaces array.
49 jobjectArray proxyClassInterfaces =
50 soa.Env()->NewObjectArray(interfaces.size(), javaLangClass, /* initialElement= */ nullptr);
51 soa.Self()->AssertNoPendingException();
52 for (size_t i = 0; i < interfaces.size(); ++i) {
53 soa.Env()->SetObjectArrayElement(proxyClassInterfaces, i,
54 soa.AddLocalReference<jclass>(interfaces[i].Get()));
55 }
56
57 // Builds the method array.
58 jsize methods_count = 3; // Object.equals, Object.hashCode and Object.toString.
59 for (Handle<mirror::Class> interface : interfaces) {
60 methods_count += interface->NumVirtualMethods();
61 }
62 jobjectArray proxyClassMethods = soa.Env()->NewObjectArray(
63 methods_count,
64 soa.AddLocalReference<jclass>(GetClassRoot<mirror::Method>()),
65 /* initialElement= */ nullptr);
66 soa.Self()->AssertNoPendingException();
67
68 jsize array_index = 0;
69 // Fill the method array
70 DCHECK_EQ(Runtime::Current()->GetClassLinker()->GetImagePointerSize(), kRuntimePointerSize);
71 ArtMethod* method = javaLangObject->FindClassMethod(
72 "equals", "(Ljava/lang/Object;)Z", kRuntimePointerSize);
73 CHECK(method != nullptr);
74 CHECK(!method->IsDirect());
75 CHECK(method->GetDeclaringClass() == javaLangObject.Get());
76 DCHECK(!Runtime::Current()->IsActiveTransaction());
77 soa.Env()->SetObjectArrayElement(
78 proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
79 mirror::Method::CreateFromArtMethod<kRuntimePointerSize, false>(soa.Self(), method)));
80 method = javaLangObject->FindClassMethod("hashCode", "()I", kRuntimePointerSize);
81 CHECK(method != nullptr);
82 CHECK(!method->IsDirect());
83 CHECK(method->GetDeclaringClass() == javaLangObject.Get());
84 soa.Env()->SetObjectArrayElement(
85 proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
86 mirror::Method::CreateFromArtMethod<kRuntimePointerSize, false>(soa.Self(), method)));
87 method = javaLangObject->FindClassMethod(
88 "toString", "()Ljava/lang/String;", kRuntimePointerSize);
89 CHECK(method != nullptr);
90 CHECK(!method->IsDirect());
91 CHECK(method->GetDeclaringClass() == javaLangObject.Get());
92 soa.Env()->SetObjectArrayElement(
93 proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
94 mirror::Method::CreateFromArtMethod<kRuntimePointerSize, false>(soa.Self(), method)));
95 // Now adds all interfaces virtual methods.
96 for (Handle<mirror::Class> interface : interfaces) {
97 for (auto& m : interface->GetDeclaredVirtualMethods(kRuntimePointerSize)) {
98 soa.Env()->SetObjectArrayElement(
99 proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
100 mirror::Method::CreateFromArtMethod<kRuntimePointerSize, false>(soa.Self(), &m)));
101 }
102 }
103 CHECK_EQ(array_index, methods_count);
104
105 // Builds an empty exception array.
106 jobjectArray proxyClassThrows = soa.Env()->NewObjectArray(0, javaLangClass, nullptr);
107 soa.Self()->AssertNoPendingException();
108
109 ObjPtr<mirror::Class> proxyClass = class_linker->CreateProxyClass(
110 soa,
111 soa.Env()->NewStringUTF(className),
112 proxyClassInterfaces,
113 jclass_loader,
114 proxyClassMethods,
115 proxyClassThrows);
116 soa.Self()->AssertNoPendingException();
117 return proxyClass;
118 }
119
120 } // namespace proxy_test
121 } // namespace art
122
123 #endif // ART_RUNTIME_PROXY_TEST_H_
124