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https://github.com/RGBCube/serenity
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9bcdbe205b
While symbolicating a crash dump for UserspaceEmulator I came across another data form we didn't support. ImplicitConst encodes a LEB128 value in the abbreviation record rather than - like all other values - in the .debug_info section.
82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
/*
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* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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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/ByteBuffer.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefCounted.h>
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#include <AK/String.h>
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#include <LibELF/Image.h>
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namespace Debug::Dwarf {
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struct AttributeValue {
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enum class Type : u8 {
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UnsignedNumber,
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SignedNumber,
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LongUnsignedNumber,
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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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RawBytes,
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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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u64 as_u64;
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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_raw_bytes;
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} data {};
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};
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class DwarfInfo {
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public:
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explicit DwarfInfo(const ELF::Image&);
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ReadonlyBytes debug_info_data() const { return m_debug_info_data; }
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ReadonlyBytes abbreviation_data() const { return m_abbreviation_data; }
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ReadonlyBytes debug_strings_data() const { return m_debug_strings_data; }
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ReadonlyBytes debug_line_strings_data() const { return m_debug_line_strings_data; }
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template<typename Callback>
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void for_each_compilation_unit(Callback) const;
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AttributeValue get_attribute_value(AttributeDataForm form, ssize_t implicit_const_value,
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InputMemoryStream& debug_info_stream, const CompilationUnit* unit = nullptr) const;
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private:
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void populate_compilation_units();
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ReadonlyBytes section_data(const String& section_name) const;
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const ELF::Image& m_elf;
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ReadonlyBytes m_debug_info_data;
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ReadonlyBytes m_abbreviation_data;
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ReadonlyBytes m_debug_strings_data;
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ReadonlyBytes m_debug_line_strings_data;
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Vector<Dwarf::CompilationUnit> m_compilation_units;
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};
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template<typename Callback>
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void DwarfInfo::for_each_compilation_unit(Callback callback) const
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{
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for (const auto& unit : m_compilation_units) {
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callback(unit);
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}
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}
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}
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