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AK: Add SourceLocation support
C++20 added std::source_location, which lets you capture the callers __FILE__ / __LINE__ / __FUNCTION__ etc as a default argument to functions. See: https://en.cppreference.com/w/cpp/utility/source_location During a bug investigation @ADKaster suggested we could use this to make the LOCK_DEBUG feature of the kernel more user friendly and allow it to automatically instrument all call sites. We then implemented / tested it over discord. :^) Co-Authored-by: Andrew Kaster <andrewdkaster@gmail.com>
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AK/SourceLocation.h
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AK/SourceLocation.h
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/*
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* Copyright (c) 2021, Andrew Kaster <andrewdkaster@gmail.com>
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* Copyright (c) 2021, Brian Gianforcaro <bgianf@serenityos.org>
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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/StringView.h>
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#include <AK/Types.h>
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namespace AK {
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class SourceLocation {
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public:
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[[nodiscard]] constexpr StringView function_name() const { return StringView(m_function); }
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[[nodiscard]] constexpr StringView file_name() const { return StringView(m_file); }
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[[nodiscard]] constexpr u32 line_number() const { return m_line; }
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[[nodiscard]] static constexpr SourceLocation current(const char* const file = __builtin_FILE(), u32 line = __builtin_LINE(), const char* const function = __builtin_FUNCTION())
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{
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return SourceLocation(file, line, function);
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}
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private:
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constexpr SourceLocation(const char* const file, u32 line, const char* const function)
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: m_function(function)
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, m_file(file)
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, m_line(line)
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{
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}
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const char* const m_function { nullptr };
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const char* const m_file { nullptr };
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const u32 m_line { 0 };
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};
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}
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using AK::SourceLocation;
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