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99 lines
4.1 KiB
99 lines
4.1 KiB
/*
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* Copyright (C) 2018 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 "var_handles.h"
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#include "common_throws.h"
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#include "dex/dex_instruction.h"
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#include "handle.h"
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#include "method_handles-inl.h"
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#include "mirror/method_type-inl.h"
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#include "mirror/var_handle.h"
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namespace art {
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namespace {
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bool VarHandleInvokeAccessorWithConversions(Thread* self,
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ShadowFrame& shadow_frame,
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Handle<mirror::VarHandle> var_handle,
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Handle<mirror::MethodType> callsite_type,
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const mirror::VarHandle::AccessMode access_mode,
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const InstructionOperands* const operands,
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JValue* result)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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StackHandleScope<1> hs(self);
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Handle<mirror::MethodType> accessor_type(hs.NewHandle(
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var_handle->GetMethodTypeForAccessMode(self, access_mode)));
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const size_t num_vregs = accessor_type->NumberOfVRegs();
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const int num_params = accessor_type->GetPTypes()->GetLength();
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ShadowFrameAllocaUniquePtr accessor_frame =
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CREATE_SHADOW_FRAME(num_vregs, nullptr, shadow_frame.GetMethod(), shadow_frame.GetDexPC());
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ShadowFrameGetter getter(shadow_frame, operands);
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static const uint32_t kFirstDestinationReg = 0;
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ShadowFrameSetter setter(accessor_frame.get(), kFirstDestinationReg);
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if (!PerformConversions(self, callsite_type, accessor_type, &getter, &setter, num_params)) {
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return false;
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}
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RangeInstructionOperands accessor_operands(kFirstDestinationReg,
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kFirstDestinationReg + num_vregs);
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if (!var_handle->Access(access_mode, accessor_frame.get(), &accessor_operands, result)) {
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return false;
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}
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return ConvertReturnValue(callsite_type, accessor_type, result);
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}
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} // namespace
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bool VarHandleInvokeAccessor(Thread* self,
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ShadowFrame& shadow_frame,
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Handle<mirror::VarHandle> var_handle,
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Handle<mirror::MethodType> callsite_type,
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const mirror::VarHandle::AccessMode access_mode,
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const InstructionOperands* const operands,
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JValue* result) {
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if (var_handle.IsNull()) {
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ThrowNullPointerExceptionFromDexPC();
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return false;
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}
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if (!var_handle->IsAccessModeSupported(access_mode)) {
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ThrowUnsupportedOperationException();
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return false;
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}
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mirror::VarHandle::MatchKind match_kind =
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var_handle->GetMethodTypeMatchForAccessMode(access_mode, callsite_type.Get());
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if (LIKELY(match_kind == mirror::VarHandle::MatchKind::kExact)) {
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return var_handle->Access(access_mode, &shadow_frame, operands, result);
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} else if (match_kind == mirror::VarHandle::MatchKind::kWithConversions) {
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return VarHandleInvokeAccessorWithConversions(self,
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shadow_frame,
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var_handle,
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callsite_type,
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access_mode,
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operands,
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result);
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} else {
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DCHECK_EQ(match_kind, mirror::VarHandle::MatchKind::kNone);
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ThrowWrongMethodTypeException(var_handle->PrettyDescriptorForAccessMode(access_mode),
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callsite_type->PrettyDescriptor());
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return false;
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}
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}
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} // namespace art
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