/*
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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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#ifndef ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_H_
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#define ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_H_
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#include "dex/dex_file.h"
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#include "dex/dex_file_types.h"
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namespace art {
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/**
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* @class DexCacheArraysLayout
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* @details This class provides the layout information for the type, method, field and
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* string arrays for a DexCache with a fixed arrays' layout (such as in the boot image),
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*/
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class DexCacheArraysLayout {
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public:
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// Construct an invalid layout.
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DexCacheArraysLayout()
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: /* types_offset_ is always 0u */
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pointer_size_(kRuntimePointerSize),
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methods_offset_(0u),
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strings_offset_(0u),
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fields_offset_(0u),
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method_types_offset_(0u),
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call_sites_offset_(0u),
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size_(0u) {
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}
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// Construct a layout for a particular dex file header.
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DexCacheArraysLayout(PointerSize pointer_size,
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const DexFile::Header& header,
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uint32_t num_call_sites);
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// Construct a layout for a particular dex file.
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DexCacheArraysLayout(PointerSize pointer_size, const DexFile* dex_file);
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bool Valid() const {
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return Size() != 0u;
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}
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size_t Size() const {
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return size_;
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}
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size_t Alignment() const;
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static constexpr size_t Alignment(PointerSize pointer_size);
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size_t TypesOffset() const {
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return types_offset_;
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}
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size_t TypeOffset(dex::TypeIndex type_idx) const;
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size_t TypesSize(size_t num_elements) const;
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size_t TypesAlignment() const;
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size_t MethodsOffset() const {
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return methods_offset_;
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}
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size_t MethodOffset(uint32_t method_idx) const;
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size_t MethodsSize(size_t num_elements) const;
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size_t MethodsAlignment() const;
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size_t StringsOffset() const {
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return strings_offset_;
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}
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size_t StringOffset(uint32_t string_idx) const;
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size_t StringsSize(size_t num_elements) const;
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size_t StringsAlignment() const;
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size_t FieldsOffset() const {
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return fields_offset_;
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}
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size_t FieldOffset(uint32_t field_idx) const;
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size_t FieldsSize(size_t num_elements) const;
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size_t FieldsAlignment() const;
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size_t MethodTypesOffset() const {
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return method_types_offset_;
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}
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size_t MethodTypesSize(size_t num_elements) const;
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size_t MethodTypesAlignment() const;
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size_t CallSitesOffset() const {
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return call_sites_offset_;
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}
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size_t CallSitesSize(size_t num_elements) const;
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size_t CallSitesAlignment() const;
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private:
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static constexpr size_t types_offset_ = 0u;
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const PointerSize pointer_size_; // Must be first for construction initialization order.
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const size_t methods_offset_;
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const size_t strings_offset_;
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const size_t fields_offset_;
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const size_t method_types_offset_;
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const size_t call_sites_offset_;
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const size_t size_;
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static size_t ElementOffset(PointerSize element_size, uint32_t idx);
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static size_t ArraySize(PointerSize element_size, uint32_t num_elements);
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static size_t PairArraySize(PointerSize element_size, uint32_t num_elements);
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};
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} // namespace art
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#endif // ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_H_
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