83 lines
3 KiB
C++
83 lines
3 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "method_handles_lookup.h"
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#include "class-inl.h"
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#include "gc_root-inl.h"
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#include "object-inl.h"
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#include "handle_scope.h"
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#include "jni_internal.h"
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#include "mirror/method_handle_impl.h"
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#include "modifiers.h"
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#include "well_known_classes.h"
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namespace art {
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namespace mirror {
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GcRoot<mirror::Class> MethodHandlesLookup::static_class_;
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void MethodHandlesLookup::SetClass(Class* klass) {
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CHECK(static_class_.IsNull()) << static_class_.Read() << " " << klass;
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CHECK(klass != nullptr);
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static_class_ = GcRoot<Class>(klass);
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}
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void MethodHandlesLookup::ResetClass() {
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CHECK(!static_class_.IsNull());
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static_class_ = GcRoot<Class>(nullptr);
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}
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void MethodHandlesLookup::VisitRoots(RootVisitor* visitor) {
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static_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass));
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}
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MethodHandlesLookup* MethodHandlesLookup::Create(Thread* const self, Handle<Class> lookup_class)
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REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_) {
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static constexpr uint32_t kAllModes = kAccPublic | kAccPrivate | kAccProtected | kAccStatic;
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StackHandleScope<1> hs(self);
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Handle<MethodHandlesLookup> mhl(
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hs.NewHandle(ObjPtr<MethodHandlesLookup>::DownCast(StaticClass()->AllocObject(self))));
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mhl->SetFieldObject<false>(LookupClassOffset(), lookup_class.Get());
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mhl->SetField32<false>(AllowedModesOffset(), kAllModes);
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return mhl.Get();
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}
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MethodHandlesLookup* MethodHandlesLookup::GetDefault(Thread* const self) {
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ArtMethod* lookup = jni::DecodeArtMethod(WellKnownClasses::java_lang_invoke_MethodHandles_lookup);
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JValue result;
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lookup->Invoke(self, nullptr, 0, &result, "L");
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return down_cast<MethodHandlesLookup*>(result.GetL());
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}
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MethodHandle* MethodHandlesLookup::FindConstructor(Thread* const self,
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Handle<Class> klass,
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Handle<MethodType> method_type) {
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ArtMethod* findConstructor =
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jni::DecodeArtMethod(WellKnownClasses::java_lang_invoke_MethodHandles_Lookup_findConstructor);
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uint32_t args[] = {
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static_cast<uint32_t>(reinterpret_cast<uintptr_t>(this)),
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static_cast<uint32_t>(reinterpret_cast<uintptr_t>(klass.Get())),
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static_cast<uint32_t>(reinterpret_cast<uintptr_t>(method_type.Get()))
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};
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JValue result;
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findConstructor->Invoke(self, args, sizeof(args), &result, "LLL");
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return down_cast<MethodHandle*>(result.GetL());
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}
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} // namespace mirror
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} // namespace art
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