mirror of
https://github.com/RGBCube/serenity
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94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
/*
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* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "CompilationUnit.h"
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#include "DwarfTypes.h"
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#include <AK/BufferStream.h>
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#include <AK/Function.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/Optional.h>
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#include <AK/Types.h>
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namespace Dwarf {
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class CompilationUnit;
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// DIE = Debugging Information Entry
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class DIE {
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public:
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DIE(const CompilationUnit&, u32 offset);
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struct AttributeValue {
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enum class Type {
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UnsignedNumber,
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SignedNumber,
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String,
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DieReference, // Reference to another DIE in the same compilation unit
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Boolean,
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DwarfExpression,
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SecOffset,
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} type;
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union {
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u32 as_u32;
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i32 as_i32;
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const char* as_string; // points to bytes in the memory mapped elf image
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bool as_bool;
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struct {
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u32 length;
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const u8* bytes; // points to bytes in the memory mapped elf image
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} as_dwarf_expression;
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} data {};
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};
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u32 offset() const { return m_offset; }
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u32 size() const { return m_size; }
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bool has_children() const { return m_has_children; }
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EntryTag tag() const { return m_tag; }
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Optional<AttributeValue> get_attribute(const Attribute&) const;
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void for_each_child(Function<void(const DIE& child)> callback) const;
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bool is_null() const { return m_tag == EntryTag::None; }
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DIE get_die_at_offset(u32 offset) const;
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private:
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AttributeValue get_attribute_value(AttributeDataForm form,
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BufferStream& debug_info_stream) const;
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const CompilationUnit& m_compilation_unit;
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u32 m_offset { 0 };
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u32 m_data_offset { 0 };
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size_t m_abbreviation_code { 0 };
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EntryTag m_tag { EntryTag::None };
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bool m_has_children { false };
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u32 m_size { 0 };
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};
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}
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