1 /*
2 * Copyright (C) 2016 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 "method_handle_impl-inl.h"
18
19 #include "class-inl.h"
20 #include "gc_root-inl.h"
21
22 namespace art {
23 namespace mirror {
24
GetReturnTypeDescriptor(const char * invoke_method_name)25 const char* MethodHandle::GetReturnTypeDescriptor(const char* invoke_method_name) {
26 if (strcmp(invoke_method_name, "invoke") == 0 || strcmp(invoke_method_name, "invokeExact") == 0) {
27 return "Ljava/lang/Object;";
28 } else {
29 return nullptr;
30 }
31 }
32
StaticClass()33 mirror::Class* MethodHandle::StaticClass() {
34 mirror::Class* klass = MethodHandleImpl::StaticClass()->GetSuperClass();
35 DCHECK(klass->DescriptorEquals("Ljava/lang/invoke/MethodHandle;"));
36 return klass;
37 }
38
Initialize(uintptr_t art_field_or_method,Kind kind,Handle<MethodType> method_type)39 void MethodHandle::Initialize(uintptr_t art_field_or_method,
40 Kind kind,
41 Handle<MethodType> method_type)
42 REQUIRES_SHARED(Locks::mutator_lock_) {
43 CHECK(!Runtime::Current()->IsActiveTransaction());
44 SetFieldObject<false>(CachedSpreadInvokerOffset(), nullptr);
45 SetFieldObject<false>(NominalTypeOffset(), nullptr);
46 SetFieldObject<false>(MethodTypeOffset(), method_type.Get());
47 SetField32<false>(HandleKindOffset(), static_cast<uint32_t>(kind));
48 SetField64<false>(ArtFieldOrMethodOffset(), art_field_or_method);
49 }
50
51 GcRoot<mirror::Class> MethodHandleImpl::static_class_;
52
StaticClass()53 mirror::Class* MethodHandleImpl::StaticClass() {
54 return static_class_.Read();
55 }
56
SetClass(Class * klass)57 void MethodHandleImpl::SetClass(Class* klass) {
58 CHECK(static_class_.IsNull()) << static_class_.Read() << " " << klass;
59 CHECK(klass != nullptr);
60 static_class_ = GcRoot<Class>(klass);
61 }
62
ResetClass()63 void MethodHandleImpl::ResetClass() {
64 CHECK(!static_class_.IsNull());
65 static_class_ = GcRoot<Class>(nullptr);
66 }
67
VisitRoots(RootVisitor * visitor)68 void MethodHandleImpl::VisitRoots(RootVisitor* visitor) {
69 static_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
70 }
71
Create(Thread * const self,uintptr_t art_field_or_method,MethodHandle::Kind kind,Handle<MethodType> method_type)72 mirror::MethodHandleImpl* MethodHandleImpl::Create(Thread* const self,
73 uintptr_t art_field_or_method,
74 MethodHandle::Kind kind,
75 Handle<MethodType> method_type)
76 REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_) {
77 StackHandleScope<1> hs(self);
78 Handle<mirror::MethodHandleImpl> mh(
79 hs.NewHandle(ObjPtr<MethodHandleImpl>::DownCast(StaticClass()->AllocObject(self))));
80 mh->Initialize(art_field_or_method, kind, method_type);
81 return mh.Get();
82 }
83
84 } // namespace mirror
85 } // namespace art
86