139 lines
5 KiB
C++
139 lines
5 KiB
C++
/*
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* Copyright (C) 2016 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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#ifndef ART_RUNTIME_METHOD_HANDLES_INL_H_
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#define ART_RUNTIME_METHOD_HANDLES_INL_H_
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#include "method_handles.h"
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#include "common_throws.h"
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#include "dex_instruction.h"
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#include "interpreter/interpreter_common.h"
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#include "jvalue.h"
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#include "mirror/class.h"
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#include "mirror/method_type.h"
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#include "mirror/object.h"
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#include "reflection.h"
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#include "stack.h"
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namespace art {
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inline bool ConvertArgumentValue(Handle<mirror::MethodType> callsite_type,
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Handle<mirror::MethodType> callee_type,
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int index,
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JValue* value) REQUIRES_SHARED(Locks::mutator_lock_) {
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ObjPtr<mirror::Class> from_class(callsite_type->GetPTypes()->GetWithoutChecks(index));
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ObjPtr<mirror::Class> to_class(callee_type->GetPTypes()->GetWithoutChecks(index));
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if (from_class == to_class) {
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return true;
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}
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// |value| may contain a bare heap pointer which is generally
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// |unsafe. ConvertJValueCommon() saves |value|, |from_class|, and
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// |to_class| to Handles where necessary to avoid issues if the heap
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// changes.
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if (ConvertJValueCommon(callsite_type, callee_type, from_class, to_class, value)) {
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DCHECK(!Thread::Current()->IsExceptionPending());
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return true;
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} else {
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DCHECK(Thread::Current()->IsExceptionPending());
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value->SetJ(0);
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return false;
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}
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}
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inline bool ConvertReturnValue(Handle<mirror::MethodType> callsite_type,
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Handle<mirror::MethodType> callee_type,
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JValue* value) REQUIRES_SHARED(Locks::mutator_lock_) {
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ObjPtr<mirror::Class> from_class(callee_type->GetRType());
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ObjPtr<mirror::Class> to_class(callsite_type->GetRType());
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if (to_class->GetPrimitiveType() == Primitive::kPrimVoid || from_class == to_class) {
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return true;
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}
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// |value| may contain a bare heap pointer which is generally
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// unsafe. ConvertJValueCommon() saves |value|, |from_class|, and
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// |to_class| to Handles where necessary to avoid issues if the heap
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// changes.
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if (ConvertJValueCommon(callsite_type, callee_type, from_class, to_class, value)) {
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DCHECK(!Thread::Current()->IsExceptionPending());
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return true;
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} else {
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DCHECK(Thread::Current()->IsExceptionPending());
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value->SetJ(0);
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return false;
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}
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}
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template <typename G, typename S>
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bool PerformConversions(Thread* self,
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Handle<mirror::MethodType> callsite_type,
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Handle<mirror::MethodType> callee_type,
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G* getter,
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S* setter,
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int32_t num_conversions) REQUIRES_SHARED(Locks::mutator_lock_) {
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StackHandleScope<2> hs(self);
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Handle<mirror::ObjectArray<mirror::Class>> from_types(hs.NewHandle(callsite_type->GetPTypes()));
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Handle<mirror::ObjectArray<mirror::Class>> to_types(hs.NewHandle(callee_type->GetPTypes()));
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for (int32_t i = 0; i < num_conversions; ++i) {
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ObjPtr<mirror::Class> from(from_types->GetWithoutChecks(i));
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ObjPtr<mirror::Class> to(to_types->GetWithoutChecks(i));
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const Primitive::Type from_type = from_types->GetWithoutChecks(i)->GetPrimitiveType();
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const Primitive::Type to_type = to_types->GetWithoutChecks(i)->GetPrimitiveType();
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if (from == to) {
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// Easy case - the types are identical. Nothing left to do except to pass
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// the arguments along verbatim.
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if (Primitive::Is64BitType(from_type)) {
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setter->SetLong(getter->GetLong());
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} else if (from_type == Primitive::kPrimNot) {
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setter->SetReference(getter->GetReference());
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} else {
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setter->Set(getter->Get());
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}
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} else {
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JValue value;
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if (Primitive::Is64BitType(from_type)) {
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value.SetJ(getter->GetLong());
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} else if (from_type == Primitive::kPrimNot) {
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value.SetL(getter->GetReference());
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} else {
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value.SetI(getter->Get());
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}
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// Caveat emptor - ObjPtr's not guaranteed valid after this call.
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if (!ConvertArgumentValue(callsite_type, callee_type, i, &value)) {
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DCHECK(self->IsExceptionPending());
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return false;
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}
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if (Primitive::Is64BitType(to_type)) {
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setter->SetLong(value.GetJ());
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} else if (to_type == Primitive::kPrimNot) {
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setter->SetReference(value.GetL());
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} else {
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setter->Set(value.GetI());
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}
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}
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}
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return true;
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}
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} // namespace art
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#endif // ART_RUNTIME_METHOD_HANDLES_INL_H_
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