1 /*
2 * Copyright (C) 2008 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 "java_lang_reflect_Method.h"
18
19 #include "art_method-inl.h"
20 #include "base/enums.h"
21 #include "class_linker.h"
22 #include "class_linker-inl.h"
23 #include "dex_file_annotations.h"
24 #include "jni_internal.h"
25 #include "mirror/class-inl.h"
26 #include "mirror/object-inl.h"
27 #include "mirror/object_array-inl.h"
28 #include "reflection.h"
29 #include "scoped_fast_native_object_access-inl.h"
30 #include "well_known_classes.h"
31
32 namespace art {
33
Method_getDefaultValue(JNIEnv * env,jobject javaMethod)34 static jobject Method_getDefaultValue(JNIEnv* env, jobject javaMethod) {
35 ScopedFastNativeObjectAccess soa(env);
36 ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
37 if (!method->GetDeclaringClass()->IsAnnotation()) {
38 return nullptr;
39 }
40 return soa.AddLocalReference<jobject>(annotations::GetAnnotationDefaultValue(method));
41 }
42
Method_getExceptionTypes(JNIEnv * env,jobject javaMethod)43 static jobjectArray Method_getExceptionTypes(JNIEnv* env, jobject javaMethod) {
44 ScopedFastNativeObjectAccess soa(env);
45 ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
46 if (method->GetDeclaringClass()->IsProxyClass()) {
47 ObjPtr<mirror::Class> klass = method->GetDeclaringClass();
48 int throws_index = -1;
49 size_t i = 0;
50 for (const auto& m : klass->GetDeclaredVirtualMethods(kRuntimePointerSize)) {
51 if (&m == method) {
52 throws_index = i;
53 break;
54 }
55 ++i;
56 }
57 CHECK_NE(throws_index, -1);
58 mirror::ObjectArray<mirror::Class>* declared_exceptions =
59 klass->GetProxyThrows()->Get(throws_index);
60 return soa.AddLocalReference<jobjectArray>(declared_exceptions->Clone(soa.Self()));
61 } else {
62 mirror::ObjectArray<mirror::Class>* result_array =
63 annotations::GetExceptionTypesForMethod(method);
64 if (result_array == nullptr) {
65 // Return an empty array instead of a null pointer
66 ObjPtr<mirror::Class> class_class = mirror::Class::GetJavaLangClass();
67 ObjPtr<mirror::Class> class_array_class =
68 Runtime::Current()->GetClassLinker()->FindArrayClass(soa.Self(), &class_class);
69 if (class_array_class == nullptr) {
70 return nullptr;
71 }
72 mirror::ObjectArray<mirror::Class>* empty_array =
73 mirror::ObjectArray<mirror::Class>::Alloc(soa.Self(), class_array_class, 0);
74 return soa.AddLocalReference<jobjectArray>(empty_array);
75 } else {
76 return soa.AddLocalReference<jobjectArray>(result_array);
77 }
78 }
79 }
80
Method_invoke(JNIEnv * env,jobject javaMethod,jobject javaReceiver,jobject javaArgs)81 static jobject Method_invoke(JNIEnv* env, jobject javaMethod, jobject javaReceiver,
82 jobject javaArgs) {
83 ScopedFastNativeObjectAccess soa(env);
84 return InvokeMethod(soa, javaMethod, javaReceiver, javaArgs);
85 }
86
87 static JNINativeMethod gMethods[] = {
88 FAST_NATIVE_METHOD(Method, getDefaultValue, "()Ljava/lang/Object;"),
89 FAST_NATIVE_METHOD(Method, getExceptionTypes, "()[Ljava/lang/Class;"),
90 FAST_NATIVE_METHOD(Method, invoke, "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;"),
91 };
92
register_java_lang_reflect_Method(JNIEnv * env)93 void register_java_lang_reflect_Method(JNIEnv* env) {
94 REGISTER_NATIVE_METHODS("java/lang/reflect/Method");
95 }
96
97 } // namespace art
98