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 "class_linker.h"
18 #include "jni_internal.h"
19 #include "mirror/art_method.h"
20 #include "mirror/art_method-inl.h"
21 #include "mirror/class-inl.h"
22 #include "mirror/object-inl.h"
23 #include "reflection.h"
24 #include "scoped_fast_native_object_access.h"
25 #include "well_known_classes.h"
26
27 namespace art {
28
29 /*
30 * We get here through Constructor.newInstance(). The Constructor object
31 * would not be available if the constructor weren't public (per the
32 * definition of Class.getConstructor), so we can skip the method access
33 * check. We can also safely assume the constructor isn't associated
34 * with an interface, array, or primitive class.
35 */
Constructor_newInstance(JNIEnv * env,jobject javaMethod,jobjectArray javaArgs,jboolean accessible)36 static jobject Constructor_newInstance(JNIEnv* env, jobject javaMethod, jobjectArray javaArgs,
37 jboolean accessible) {
38 ScopedFastNativeObjectAccess soa(env);
39 mirror::ArtMethod* m = mirror::ArtMethod::FromReflectedMethod(soa, javaMethod);
40 StackHandleScope<1> hs(soa.Self());
41 Handle<mirror::Class> c(hs.NewHandle(m->GetDeclaringClass()));
42 if (UNLIKELY(c->IsAbstract())) {
43 ThrowLocation throw_location = soa.Self()->GetCurrentLocationForThrow();
44 soa.Self()->ThrowNewExceptionF(throw_location, "Ljava/lang/InstantiationException;",
45 "Can't instantiate %s %s",
46 c->IsInterface() ? "interface" : "abstract class",
47 PrettyDescriptor(c.Get()).c_str());
48 return nullptr;
49 }
50
51 if (!Runtime::Current()->GetClassLinker()->EnsureInitialized(c, true, true)) {
52 DCHECK(soa.Self()->IsExceptionPending());
53 return nullptr;
54 }
55
56 bool movable = true;
57 if (!kMovingMethods && c->IsArtMethodClass()) {
58 movable = false;
59 } else if (!kMovingFields && c->IsArtFieldClass()) {
60 movable = false;
61 } else if (!kMovingClasses && c->IsClassClass()) {
62 movable = false;
63 }
64 mirror::Object* receiver =
65 movable ? c->AllocObject(soa.Self()) : c->AllocNonMovableObject(soa.Self());
66 if (receiver == nullptr) {
67 return nullptr;
68 }
69
70 jobject javaReceiver = soa.AddLocalReference<jobject>(receiver);
71 InvokeMethod(soa, javaMethod, javaReceiver, javaArgs, (accessible == JNI_TRUE));
72
73 // Constructors are ()V methods, so we shouldn't touch the result of InvokeMethod.
74 return javaReceiver;
75 }
76
77 static JNINativeMethod gMethods[] = {
78 NATIVE_METHOD(Constructor, newInstance, "!([Ljava/lang/Object;Z)Ljava/lang/Object;"),
79 };
80
register_java_lang_reflect_Constructor(JNIEnv * env)81 void register_java_lang_reflect_Constructor(JNIEnv* env) {
82 REGISTER_NATIVE_METHODS("java/lang/reflect/Constructor");
83 }
84
85 } // namespace art
86