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/*
* Copyright (c) 2020-2021, Itamar S. <itamar8910@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "AttributeValue.h"
#include "CompilationUnit.h"
#include "DwarfTypes.h"
#include <AK/ByteBuffer.h>
#include <AK/NonnullOwnPtrVector.h>
#include <AK/NonnullRefPtr.h>
#include <AK/RedBlackTree.h>
#include <AK/RefCounted.h>
#include <AK/String.h>
#include <LibELF/Image.h>
namespace Debug::Dwarf {
class DwarfInfo {
AK_MAKE_NONCOPYABLE(DwarfInfo);
AK_MAKE_NONMOVABLE(DwarfInfo);
public:
explicit DwarfInfo(ELF::Image const&);
ReadonlyBytes debug_info_data() const { return m_debug_info_data; }
ReadonlyBytes abbreviation_data() const { return m_abbreviation_data; }
ReadonlyBytes debug_strings_data() const { return m_debug_strings_data; }
ReadonlyBytes debug_line_strings_data() const { return m_debug_line_strings_data; }
ReadonlyBytes debug_range_lists_data() const { return m_debug_range_lists_data; }
ReadonlyBytes debug_str_offsets_data() const { return m_debug_str_offsets_data; }
ReadonlyBytes debug_addr_data() const { return m_debug_addr_data; }
template<typename Callback>
void for_each_compilation_unit(Callback) const;
AttributeValue get_attribute_value(AttributeDataForm form, ssize_t implicit_const_value,
InputMemoryStream& debug_info_stream, const CompilationUnit* unit = nullptr) const;
Optional<DIE> get_die_at_address(FlatPtr) const;
// Note that even if there is a DIE at the given offset,
// but it does not exist in the DIE cache (because for example
// it does not contain an address range), then this function will not return it.
// To get any DIE object at a given offset in a compilation unit,
// use CompilationUnit::get_die_at_offset.
Optional<DIE> get_cached_die_at_offset(FlatPtr) const;
private:
void populate_compilation_units();
void build_cached_dies() const;
ReadonlyBytes section_data(StringView const& section_name) const;
ELF::Image const& m_elf;
ReadonlyBytes m_debug_info_data;
ReadonlyBytes m_abbreviation_data;
ReadonlyBytes m_debug_strings_data;
ReadonlyBytes m_debug_line_data;
ReadonlyBytes m_debug_line_strings_data;
ReadonlyBytes m_debug_range_lists_data;
ReadonlyBytes m_debug_str_offsets_data;
ReadonlyBytes m_debug_addr_data;
NonnullOwnPtrVector<Dwarf::CompilationUnit> m_compilation_units;
struct DIERange {
FlatPtr start_address { 0 };
FlatPtr end_address { 0 };
};
struct DIEAndRange {
DIE die;
DIERange range;
};
using DIEStartAddress = FlatPtr;
mutable RedBlackTree<DIEStartAddress, DIEAndRange> m_cached_dies_by_range;
mutable RedBlackTree<FlatPtr, DIE> m_cached_dies_by_offset;
mutable bool m_built_cached_dies { false };
};
template<typename Callback>
void DwarfInfo::for_each_compilation_unit(Callback callback) const
{
for (const auto& unit : m_compilation_units) {
callback(unit);
}
}
}
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