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