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4296425bd8
C++20 can automatically synthesize `operator!=` from `operator==`, so there is no point in writing such functions by hand if all they do is call through to `operator==`. This fixes a compile error with compilers that implement P2468 (Clang 16 currently). This paper restores the C++17 behavior that if both `T::operator==(U)` and `T::operator!=(U)` exist, `U == T` won't be rewritten in reverse to call `T::operator==(U)`. Removing `!=` operators makes the rewriting possible again. See https://reviews.llvm.org/D134529#3853062
136 lines
4.2 KiB
C++
136 lines
4.2 KiB
C++
/*
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* Copyright (c) 2020-2021, 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 <AK/NonnullOwnPtrVector.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/Optional.h>
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#include <AK/OwnPtr.h>
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#include <AK/Vector.h>
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#include <LibDebug/Dwarf/DIE.h>
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#include <LibDebug/Dwarf/DwarfInfo.h>
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#include <LibDebug/Dwarf/LineProgram.h>
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#include <LibELF/Image.h>
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#include <sys/arch/i386/regs.h>
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namespace Debug {
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class DebugInfo {
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AK_MAKE_NONCOPYABLE(DebugInfo);
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AK_MAKE_NONMOVABLE(DebugInfo);
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public:
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explicit DebugInfo(ELF::Image const&, String source_root = {}, FlatPtr base_address = 0);
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ELF::Image const& elf() const { return m_elf; }
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struct SourcePosition {
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FlyString file_path;
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size_t line_number { 0 };
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Optional<FlatPtr> address_of_first_statement;
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SourcePosition()
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: SourcePosition(String::empty(), 0)
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{
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}
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SourcePosition(String file_path, size_t line_number)
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: file_path(file_path)
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, line_number(line_number)
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{
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}
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SourcePosition(String file_path, size_t line_number, FlatPtr address_of_first_statement)
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: file_path(file_path)
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, line_number(line_number)
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, address_of_first_statement(address_of_first_statement)
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{
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}
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bool operator==(SourcePosition const& other) const { return file_path == other.file_path && line_number == other.line_number; }
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static SourcePosition from_line_info(Dwarf::LineProgram::LineInfo const&);
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};
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struct VariableInfo {
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enum class LocationType {
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None,
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Address,
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Register,
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};
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String name;
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String type_name;
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LocationType location_type { LocationType::None };
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union {
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FlatPtr address;
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} location_data { 0 };
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union {
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u32 as_u32;
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u32 as_i32;
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char const* as_string;
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} constant_data { 0 };
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Dwarf::EntryTag type_tag;
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OwnPtr<VariableInfo> type;
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NonnullOwnPtrVector<VariableInfo> members;
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VariableInfo* parent { nullptr };
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Vector<u32> dimension_sizes;
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bool is_enum_type() const { return type && type->type_tag == Dwarf::EntryTag::EnumerationType; }
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};
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struct VariablesScope {
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bool is_function { false };
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String name;
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FlatPtr address_low { 0 };
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FlatPtr address_high { 0 }; // Non-inclusive - the lowest address after address_low that's not in this scope
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Vector<Dwarf::DIE> dies_of_variables;
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};
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NonnullOwnPtrVector<VariableInfo> get_variables_in_current_scope(PtraceRegisters const&) const;
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Optional<SourcePosition> get_source_position(FlatPtr address) const;
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struct SourcePositionWithInlines {
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Optional<SourcePosition> source_position;
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Vector<SourcePosition> inline_chain;
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};
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SourcePositionWithInlines get_source_position_with_inlines(FlatPtr address) const;
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struct SourcePositionAndAddress {
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String file;
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size_t line;
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FlatPtr address;
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};
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Optional<SourcePositionAndAddress> get_address_from_source_position(String const& file, size_t line) const;
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String name_of_containing_function(FlatPtr address) const;
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Vector<SourcePosition> source_lines_in_scope(VariablesScope const&) const;
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Optional<VariablesScope> get_containing_function(FlatPtr address) const;
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private:
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void prepare_variable_scopes();
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void prepare_lines();
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void parse_scopes_impl(Dwarf::DIE const& die);
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OwnPtr<VariableInfo> create_variable_info(Dwarf::DIE const& variable_die, PtraceRegisters const&, u32 address_offset = 0) const;
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static bool is_variable_tag_supported(Dwarf::EntryTag const& tag);
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void add_type_info_to_variable(Dwarf::DIE const& type_die, PtraceRegisters const& regs, DebugInfo::VariableInfo* parent_variable) const;
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Optional<Dwarf::LineProgram::DirectoryAndFile> get_source_path_of_inline(Dwarf::DIE const&) const;
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Optional<uint32_t> get_line_of_inline(Dwarf::DIE const&) const;
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ELF::Image const& m_elf;
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String m_source_root;
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FlatPtr m_base_address { 0 };
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Dwarf::DwarfInfo m_dwarf_info;
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Vector<VariablesScope> m_scopes;
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Vector<Dwarf::LineProgram::LineInfo> m_sorted_lines;
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};
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}
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