| //===- DWARFAcceleratorTable.h ----------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_DEBUGINFO_DWARFACCELERATORTABLE_H |
| #define LLVM_DEBUGINFO_DWARFACCELERATORTABLE_H |
| |
| #include "llvm/ADT/SmallVector.h" |
| #include "llvm/BinaryFormat/Dwarf.h" |
| #include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h" |
| #include "llvm/DebugInfo/DWARF/DWARFRelocMap.h" |
| #include <cstdint> |
| #include <utility> |
| |
| namespace llvm { |
| |
| class raw_ostream; |
| |
| class DWARFAcceleratorTable { |
| struct Header { |
| uint32_t Magic; |
| uint16_t Version; |
| uint16_t HashFunction; |
| uint32_t NumBuckets; |
| uint32_t NumHashes; |
| uint32_t HeaderDataLength; |
| }; |
| |
| struct HeaderData { |
| using AtomType = uint16_t; |
| using Form = dwarf::Form; |
| |
| uint32_t DIEOffsetBase; |
| SmallVector<std::pair<AtomType, Form>, 3> Atoms; |
| }; |
| |
| struct Header Hdr; |
| struct HeaderData HdrData; |
| DWARFDataExtractor AccelSection; |
| DataExtractor StringSection; |
| |
| public: |
| DWARFAcceleratorTable(const DWARFDataExtractor &AccelSection, |
| DataExtractor StringSection) |
| : AccelSection(AccelSection), StringSection(StringSection) {} |
| |
| bool extract(); |
| uint32_t getNumBuckets(); |
| uint32_t getNumHashes(); |
| uint32_t getSizeHdr(); |
| uint32_t getHeaderDataLength(); |
| ArrayRef<std::pair<HeaderData::AtomType, HeaderData::Form>> getAtomsDesc(); |
| bool validateForms(); |
| |
| /// Return information related to the DWARF DIE we're looking for when |
| /// performing a lookup by name. |
| /// |
| /// \param HashDataOffset an offset into the hash data table |
| /// \returns DIEOffset the offset into the .debug_info section for the DIE |
| /// related to the input hash data offset. Currently this function returns |
| /// only the DIEOffset but it can be modified to return more data regarding |
| /// the DIE |
| uint32_t readAtoms(uint32_t &HashDataOffset); |
| void dump(raw_ostream &OS) const; |
| }; |
| |
| } // end namespace llvm |
| |
| #endif // LLVM_DEBUGINFO_DWARFACCELERATORTABLE_H |