//===-- DIERef.h ------------------------------------------------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #ifndef LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DIEREF_H #define LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DIEREF_H #include "lldb/Core/dwarf.h" #include "llvm/ADT/Optional.h" #include "llvm/Support/FormatProviders.h" #include #include /// Identifies a DWARF debug info entry within a given Module. It contains three /// "coordinates": /// - dwo_num: identifies the dwo file in the Module. If this field is not set, /// the DIERef references the main file. /// - section: identifies the section of the debug info entry in the given file: /// debug_info or debug_types. /// - die_offset: The offset of the debug info entry as an absolute offset from /// the beginning of the section specified in the section field. class DIERef { public: enum Section : uint8_t { DebugInfo, DebugTypes }; DIERef(llvm::Optional dwo_num, Section section, dw_offset_t die_offset) : m_dwo_num(dwo_num.getValueOr(0)), m_dwo_num_valid(bool(dwo_num)), m_section(section), m_die_offset(die_offset) { assert(this->dwo_num() == dwo_num && "Dwo number out of range?"); } llvm::Optional dwo_num() const { if (m_dwo_num_valid) return m_dwo_num; return llvm::None; } Section section() const { return static_cast
(m_section); } dw_offset_t die_offset() const { return m_die_offset; } bool operator<(DIERef other) const { if (m_dwo_num_valid != other.m_dwo_num_valid) return m_dwo_num_valid < other.m_dwo_num_valid; if (m_dwo_num_valid && (m_dwo_num != other.m_dwo_num)) return m_dwo_num < other.m_dwo_num; if (m_section != other.m_section) return m_section < other.m_section; return m_die_offset < other.m_die_offset; } private: uint32_t m_dwo_num : 30; uint32_t m_dwo_num_valid : 1; uint32_t m_section : 1; dw_offset_t m_die_offset; }; static_assert(sizeof(DIERef) == 8, ""); typedef std::vector DIEArray; namespace llvm { template<> struct format_provider { static void format(const DIERef &ref, raw_ostream &OS, StringRef Style); }; } // namespace llvm #endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DIEREF_H