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