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89 lines
3.2 KiB
89 lines
3.2 KiB
4 months ago
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/*
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* Copyright (C) 2013 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 "dex_compilation_unit.h"
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#include "art_field.h"
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#include "base/utils.h"
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#include "dex/class_accessor-inl.h"
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#include "dex/code_item_accessors-inl.h"
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#include "dex/descriptors_names.h"
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#include "mirror/class-inl.h"
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#include "mirror/dex_cache.h"
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#include "scoped_thread_state_change-inl.h"
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namespace art {
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DexCompilationUnit::DexCompilationUnit(Handle<mirror::ClassLoader> class_loader,
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ClassLinker* class_linker,
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const DexFile& dex_file,
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const dex::CodeItem* code_item,
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uint16_t class_def_idx,
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uint32_t method_idx,
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uint32_t access_flags,
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const VerifiedMethod* verified_method,
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Handle<mirror::DexCache> dex_cache,
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Handle<mirror::Class> compiling_class)
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: class_loader_(class_loader),
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class_linker_(class_linker),
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dex_file_(&dex_file),
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code_item_(code_item),
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class_def_idx_(class_def_idx),
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dex_method_idx_(method_idx),
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access_flags_(access_flags),
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verified_method_(verified_method),
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dex_cache_(dex_cache),
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code_item_accessor_(dex_file, code_item),
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compiling_class_(compiling_class) {}
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const std::string& DexCompilationUnit::GetSymbol() {
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if (symbol_.empty()) {
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symbol_ = "dex_";
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symbol_ += MangleForJni(dex_file_->PrettyMethod(dex_method_idx_));
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}
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return symbol_;
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}
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bool DexCompilationUnit::RequiresConstructorBarrier() const {
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// Constructor barriers are applicable only for <init> methods.
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DCHECK(!IsStatic());
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DCHECK(IsConstructor());
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// We require a constructor barrier if there are final instance fields.
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if (GetCompilingClass().GetReference() != nullptr && !GetCompilingClass().IsNull()) {
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// Decoding class data can be slow, so iterate over fields of the compiling class if resolved.
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ScopedObjectAccess soa(Thread::Current());
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ObjPtr<mirror::Class> compiling_class = GetCompilingClass().Get();
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for (size_t i = 0, size = compiling_class->NumInstanceFields(); i != size; ++i) {
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ArtField* field = compiling_class->GetInstanceField(i);
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if (field->IsFinal()) {
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return true;
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}
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}
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} else {
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// Iterate over field definitions in the class data.
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ClassAccessor accessor(*GetDexFile(), GetClassDefIndex());
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for (const ClassAccessor::Field& field : accessor.GetInstanceFields()) {
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if (field.IsFinal()) {
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return true;
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}
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}
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}
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return false;
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}
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} // namespace art
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