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_Array.h" 18 19 #include "nativehelper/jni_macros.h" 20 21 #include "class_linker-inl.h" 22 #include "common_throws.h" 23 #include "dex/dex_file-inl.h" 24 #include "handle_scope-inl.h" 25 #include "jni_internal.h" 26 #include "mirror/class-inl.h" 27 #include "mirror/object-inl.h" 28 #include "native_util.h" 29 #include "scoped_fast_native_object_access-inl.h" 30 31 namespace art { 32 33 static jobject Array_createMultiArray( 34 JNIEnv* env, jclass, jclass javaElementClass, jintArray javaDimArray) { 35 ScopedFastNativeObjectAccess soa(env); 36 DCHECK(javaElementClass != nullptr); 37 StackHandleScope<2> hs(soa.Self()); 38 Handle<mirror::Class> element_class(hs.NewHandle(soa.Decode<mirror::Class>(javaElementClass))); 39 DCHECK(element_class->IsClass()); 40 DCHECK(javaDimArray != nullptr); 41 ObjPtr<mirror::Object> dimensions_obj = soa.Decode<mirror::Object>(javaDimArray); 42 DCHECK(dimensions_obj->IsArrayInstance()); 43 DCHECK_EQ(dimensions_obj->GetClass()->GetComponentType()->GetPrimitiveType(), 44 Primitive::kPrimInt); 45 Handle<mirror::IntArray> dimensions_array( 46 hs.NewHandle(ObjPtr<mirror::IntArray>::DownCast(dimensions_obj))); 47 mirror::Array* new_array = mirror::Array::CreateMultiArray(soa.Self(), 48 element_class, 49 dimensions_array); 50 return soa.AddLocalReference<jobject>(new_array); 51 } 52 53 static jobject Array_createObjectArray(JNIEnv* env, jclass, jclass javaElementClass, jint length) { 54 ScopedFastNativeObjectAccess soa(env); 55 DCHECK(javaElementClass != nullptr); 56 if (UNLIKELY(length < 0)) { 57 ThrowNegativeArraySizeException(length); 58 return nullptr; 59 } 60 ObjPtr<mirror::Class> element_class = soa.Decode<mirror::Class>(javaElementClass); 61 Runtime* runtime = Runtime::Current(); 62 ClassLinker* class_linker = runtime->GetClassLinker(); 63 ObjPtr<mirror::Class> array_class = class_linker->FindArrayClass(soa.Self(), &element_class); 64 if (UNLIKELY(array_class == nullptr)) { 65 CHECK(soa.Self()->IsExceptionPending()); 66 return nullptr; 67 } 68 DCHECK(array_class->IsObjectArrayClass()); 69 ObjPtr<mirror::Array> new_array = mirror::ObjectArray<mirror::Object*>::Alloc( 70 soa.Self(), 71 array_class, 72 length, 73 runtime->GetHeap()->GetCurrentAllocator()); 74 return soa.AddLocalReference<jobject>(new_array); 75 } 76 77 static JNINativeMethod gMethods[] = { 78 FAST_NATIVE_METHOD(Array, createMultiArray, "(Ljava/lang/Class;[I)Ljava/lang/Object;"), 79 FAST_NATIVE_METHOD(Array, createObjectArray, "(Ljava/lang/Class;I)Ljava/lang/Object;"), 80 }; 81 82 void register_java_lang_reflect_Array(JNIEnv* env) { 83 REGISTER_NATIVE_METHODS("java/lang/reflect/Array"); 84 } 85 86 } // namespace art 87
