103 lines
4.1 KiB
C++
103 lines
4.1 KiB
C++
/*
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* Copyright (C) 2015 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 "field-inl.h"
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#include "class-inl.h"
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#include "dex_cache-inl.h"
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#include "object-inl.h"
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#include "object_array-inl.h"
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#include "write_barrier.h"
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namespace art {
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namespace mirror {
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void Field::VisitTarget(ReflectiveValueVisitor* v) {
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HeapReflectiveSourceInfo hrsi(kSourceJavaLangReflectField, this);
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ArtField* orig = GetArtField();
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ArtField* new_value = v->VisitField(orig, hrsi);
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if (orig != new_value) {
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SetOffset<false>(new_value->GetOffset().Int32Value());
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SetDeclaringClass<false>(new_value->GetDeclaringClass());
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auto new_range =
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IsStatic() ? GetDeclaringClass()->GetSFields() : GetDeclaringClass()->GetIFields();
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auto position = std::find_if(
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new_range.begin(), new_range.end(), [&](const auto& f) { return &f == new_value; });
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DCHECK(position != new_range.end());
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SetArtFieldIndex<false>(std::distance(new_range.begin(), position));
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WriteBarrier::ForEveryFieldWrite(this);
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}
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DCHECK_EQ(new_value, GetArtField());
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}
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ArtField* Field::GetArtField() {
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ObjPtr<mirror::Class> declaring_class = GetDeclaringClass();
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if (IsStatic()) {
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DCHECK_LT(GetArtFieldIndex(), declaring_class->NumStaticFields());
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return declaring_class->GetStaticField(GetArtFieldIndex());
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} else {
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DCHECK_LT(GetArtFieldIndex(), declaring_class->NumInstanceFields());
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return declaring_class->GetInstanceField(GetArtFieldIndex());
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}
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}
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ObjPtr<mirror::Field> Field::CreateFromArtField(Thread* self,
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ArtField* field,
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bool force_resolve) {
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StackHandleScope<2> hs(self);
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// Try to resolve type before allocating since this is a thread suspension point.
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Handle<mirror::Class> type = hs.NewHandle(field->ResolveType());
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if (type == nullptr) {
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DCHECK(self->IsExceptionPending());
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if (force_resolve) {
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return nullptr;
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} else {
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// Can't resolve, clear the exception if it isn't OOME and continue with a null type.
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mirror::Throwable* exception = self->GetException();
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if (exception->GetClass()->DescriptorEquals("Ljava/lang/OutOfMemoryError;")) {
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return nullptr;
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}
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self->ClearException();
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}
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}
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auto ret = hs.NewHandle(ObjPtr<Field>::DownCast(GetClassRoot<Field>()->AllocObject(self)));
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if (UNLIKELY(ret == nullptr)) {
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self->AssertPendingOOMException();
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return nullptr;
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}
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// We're initializing a newly allocated object, so we do not need to record that under
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// a transaction. If the transaction is aborted, the whole object shall be unreachable.
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ret->SetType</*kTransactionActive=*/ false, /*kCheckTransaction=*/ false>(type.Get());
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ret->SetDeclaringClass</*kTransactionActive=*/ false, /*kCheckTransaction=*/ false>(
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field->GetDeclaringClass());
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ret->SetAccessFlags</*kTransactionActive=*/ false, /*kCheckTransaction=*/ false>(
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field->GetAccessFlags());
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auto iter_range = field->IsStatic() ? field->GetDeclaringClass()->GetSFields()
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: field->GetDeclaringClass()->GetIFields();
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auto position = std::find_if(
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iter_range.begin(), iter_range.end(), [&](const auto& f) { return &f == field; });
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DCHECK(position != iter_range.end());
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ret->SetArtFieldIndex</*kTransactionActive=*/ false, /*kCheckTransaction=*/ false>(
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std::distance(iter_range.begin(), position));
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ret->SetOffset</*kTransactionActive=*/ false, /*kCheckTransaction=*/ false>(
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field->GetOffset().Int32Value());
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return ret.Get();
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}
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} // namespace mirror
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} // namespace art
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