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8a886e0e96
DWARF line number information, if generated, is stored in the .debug_line section of an object file. The information is encoded as instructions for a VM that is defined in the DWARF specification. By executing these instructions, we can extract the encoded line number information.
56 lines
2.2 KiB
C++
56 lines
2.2 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/NonnullRefPtr.h>
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#include <AK/Optional.h>
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#include <AK/Vector.h>
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#include <LibELF/Loader.h>
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#include <Libraries/LibDebug/Dwarf/LineProgram.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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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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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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private:
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void prepare_lines();
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NonnullRefPtr<const ELF::Loader> m_elf;
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Vector<LineProgram::LineInfo> m_sorted_lines;
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};
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