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