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 "nativehelper/jni_macros.h"
20
21 #include "art_method-inl.h"
22 #include "base/enums.h"
23 #include "class_linker-inl.h"
24 #include "class_linker.h"
25 #include "class_root-inl.h"
26 #include "dex/dex_file_annotations.h"
27 #include "jni/jni_internal.h"
28 #include "mirror/class-inl.h"
29 #include "mirror/object-inl.h"
30 #include "mirror/object_array-alloc-inl.h"
31 #include "native_util.h"
32 #include "reflection.h"
33 #include "scoped_fast_native_object_access-inl.h"
34 #include "well_known_classes.h"
35
36 namespace art {
37
Method_getDefaultValue(JNIEnv * env,jobject javaMethod)38 static jobject Method_getDefaultValue(JNIEnv* env, jobject javaMethod) {
39 ScopedFastNativeObjectAccess soa(env);
40 ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
41 if (!method->GetDeclaringClass()->IsAnnotation()) {
42 return nullptr;
43 }
44 return soa.AddLocalReference<jobject>(annotations::GetAnnotationDefaultValue(method));
45 }
46
Method_getExceptionTypes(JNIEnv * env,jobject javaMethod)47 static jobjectArray Method_getExceptionTypes(JNIEnv* env, jobject javaMethod) {
48 ScopedFastNativeObjectAccess soa(env);
49 ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
50 if (method->GetDeclaringClass()->IsProxyClass()) {
51 ObjPtr<mirror::Class> klass = method->GetDeclaringClass();
52 int throws_index = -1;
53 size_t i = 0;
54 for (const auto& m : klass->GetDeclaredVirtualMethods(kRuntimePointerSize)) {
55 if (&m == method) {
56 throws_index = i;
57 break;
58 }
59 ++i;
60 }
61 CHECK_NE(throws_index, -1);
62 StackHandleScope<1u> hs(soa.Self());
63 Handle<mirror::ObjectArray<mirror::Class>> declared_exceptions =
64 hs.NewHandle(klass->GetProxyThrows()->Get(throws_index));
65 return soa.AddLocalReference<jobjectArray>(
66 mirror::ObjectArray<mirror::Class>::Clone(declared_exceptions, soa.Self()));
67 } else {
68 ObjPtr<mirror::ObjectArray<mirror::Class>> result_array =
69 annotations::GetExceptionTypesForMethod(method);
70 if (result_array == nullptr) {
71 // Return an empty array instead of a null pointer
72 ObjPtr<mirror::Class> class_array_class = GetClassRoot<mirror::ObjectArray<mirror::Class>>();
73 DCHECK(class_array_class != nullptr);
74 ObjPtr<mirror::ObjectArray<mirror::Class>> empty_array =
75 mirror::ObjectArray<mirror::Class>::Alloc(soa.Self(), class_array_class, 0);
76 return soa.AddLocalReference<jobjectArray>(empty_array);
77 } else {
78 return soa.AddLocalReference<jobjectArray>(result_array);
79 }
80 }
81 }
82
Method_invoke(JNIEnv * env,jobject javaMethod,jobject javaReceiver,jobjectArray javaArgs)83 static jobject Method_invoke(JNIEnv* env, jobject javaMethod, jobject javaReceiver,
84 jobjectArray javaArgs) {
85 ScopedFastNativeObjectAccess soa(env);
86 return InvokeMethod(soa, javaMethod, javaReceiver, javaArgs);
87 }
88
89 static JNINativeMethod gMethods[] = {
90 FAST_NATIVE_METHOD(Method, getDefaultValue, "()Ljava/lang/Object;"),
91 FAST_NATIVE_METHOD(Method, getExceptionTypes, "()[Ljava/lang/Class;"),
92 FAST_NATIVE_METHOD(Method, invoke, "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;"),
93 };
94
register_java_lang_reflect_Method(JNIEnv * env)95 void register_java_lang_reflect_Method(JNIEnv* env) {
96 REGISTER_NATIVE_METHODS("java/lang/reflect/Method");
97 }
98
99 } // namespace art
100