135 lines
4.1 KiB
C
135 lines
4.1 KiB
C
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/*
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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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#ifndef NOGROD_DWARF_INFO_
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#define NOGROD_DWARF_INFO_
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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#include <optional>
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include "dwarf_abbrev.h"
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#include "string_offset_table.h"
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#include "string_table.h"
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#include "berberis/base/macros.h"
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namespace nogrod {
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class DwarfDie final {
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public:
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DwarfDie(const DwarfCompilationUnitHeader* cu,
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const DwarfDie* parent,
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uint64_t offset,
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uint16_t tag);
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DwarfDie(const DwarfDie&) = delete;
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const DwarfDie& operator=(const DwarfDie&) = delete;
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void AddAttribute(DwarfAttribute* attribute);
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void AddChild(const DwarfDie* child);
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[[nodiscard]] uint16_t tag() const { return tag_; }
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[[nodiscard]] uint64_t offset() const { return offset_; }
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[[nodiscard]] const DwarfCompilationUnitHeader* compilation_unit_header() const {
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return compilation_unit_header_;
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}
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[[nodiscard]] const DwarfDie* parent() const { return parent_; }
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[[nodiscard]] const std::vector<const DwarfDie*>& children() const { return children_; }
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[[nodiscard]] std::optional<std::string> GetStringAttribute(uint16_t attr_name) const;
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[[nodiscard]] std::optional<uint64_t> GetUint64Attribute(uint16_t attr_name) const;
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[[nodiscard]] uint64_t GetUint64AttributeOr(uint16_t attr_name, uint64_t default_value) const {
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return GetUint64Attribute(attr_name).value_or(default_value);
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}
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[[nodiscard]] bool GetBoolAttributeOr(uint16_t attr_name, bool default_value) const;
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void ResolveAttributes(DwarfContext* context);
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private:
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const DwarfCompilationUnitHeader* compilation_unit_header_;
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const DwarfDie* parent_;
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uint64_t offset_;
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uint16_t tag_;
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std::vector<std::unique_ptr<DwarfAttribute>> attributes_;
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std::vector<const DwarfDie*> children_;
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};
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class DwarfCompilationUnit {
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public:
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DwarfCompilationUnit(uint64_t unit_offset,
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uint64_t unit_length,
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uint16_t version,
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uint64_t abbrev_offset,
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uint8_t address_size,
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bool is_dwarf64);
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DwarfCompilationUnit(const DwarfCompilationUnit&) = delete;
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DwarfCompilationUnit& operator=(const DwarfCompilationUnit&) = delete;
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DwarfCompilationUnit(DwarfCompilationUnit&&) = default;
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DwarfCompilationUnit& operator=(DwarfCompilationUnit&&) = default;
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void SetDie(const DwarfDie* die);
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[[nodiscard]] const DwarfDie* GetDie() const { return cu_die_; }
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[[nodiscard]] const DwarfCompilationUnitHeader& header() const { return header_; }
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private:
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DwarfCompilationUnitHeader header_;
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const DwarfDie* cu_die_;
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};
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class DwarfInfo {
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public:
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DwarfInfo(const uint8_t* abbrev,
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size_t abbrev_size,
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const uint8_t* info,
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size_t info_size,
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StringTable string_table,
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std::optional<StringOffsetTable> string_offset_table);
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DwarfInfo(const DwarfInfo&) = delete;
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const DwarfInfo& operator=(const DwarfInfo&) = delete;
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bool Parse(std::string* error_msg);
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[[nodiscard]] std::vector<const DwarfDie*> FindDiesByName(const std::string& name) const;
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[[nodiscard]] const DwarfDie* GetDieByOffset(uint64_t offset) const;
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private:
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const uint8_t* abbrev_;
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size_t abbrev_size_;
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const uint8_t* info_;
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size_t info_size_;
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StringTable string_table_;
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std::optional<StringOffsetTable> string_offset_table_;
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std::vector<std::unique_ptr<DwarfCompilationUnit>> compilation_units_;
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std::unordered_map<uint64_t, std::unique_ptr<DwarfDie>> die_offset_map_;
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};
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} // namespace nogrod
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#endif // NOGROD_DWARF_INFO_
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