mirror of
https://github.com/RGBCube/serenity
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119 lines
4.2 KiB
C++
119 lines
4.2 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 <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/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/Loader.h>
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#include <sys/arch/i386/regs.h>
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class DebugInfo {
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public:
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explicit DebugInfo(NonnullRefPtr<const ELF::Loader> elf);
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struct SourcePosition {
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String file_path;
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size_t line_number { 0 };
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u32 address_of_first_statement { 0 };
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bool operator==(const SourcePosition& other) const { return file_path == other.file_path && line_number == other.line_number; }
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bool operator!=(const SourcePosition& other) const { return !(*this == other); }
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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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u32 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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const char* 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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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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u32 address_low { 0 };
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u32 address_high { 0 };
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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(const PtraceRegisters&) const;
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Optional<SourcePosition> get_source_position(u32 address) const;
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Optional<u32> get_instruction_from_source(const String& file, size_t line) const;
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template<typename Callback>
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void for_each_source_position(Callback callback) const
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{
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String previous_file = "";
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size_t previous_line = 0;
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for (const auto& line_info : m_sorted_lines) {
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if (line_info.file == previous_file && line_info.line == previous_line)
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continue;
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previous_file = line_info.file;
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previous_line = line_info.line;
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callback({ line_info.file, line_info.line, line_info.address });
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}
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}
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String name_of_containing_function(u32 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(const Dwarf::DIE& die);
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OwnPtr<VariableInfo> create_variable_info(const Dwarf::DIE& variable_die, const PtraceRegisters&) const;
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NonnullRefPtr<const ELF::Loader> m_elf;
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NonnullRefPtr<Dwarf::DwarfInfo> m_dwarf_info;
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Vector<VariablesScope> m_scopes;
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Vector<LineProgram::LineInfo> m_sorted_lines;
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};
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