1 //===- DWARFDebugArangeSet.h ------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_DEBUGINFO_DWARFDEBUGARANGESET_H 10 #define LLVM_DEBUGINFO_DWARFDEBUGARANGESET_H 11 12 #include "llvm/ADT/iterator_range.h" 13 #include "llvm/Support/DataExtractor.h" 14 #include <cstdint> 15 #include <vector> 16 17 namespace llvm { 18 19 class raw_ostream; 20 21 class DWARFDebugArangeSet { 22 public: 23 struct Header { 24 /// The total length of the entries for that set, not including the length 25 /// field itself. 26 uint32_t Length; 27 /// The offset from the beginning of the .debug_info section of the 28 /// compilation unit entry referenced by the table. 29 uint32_t CuOffset; 30 /// The DWARF version number. 31 uint16_t Version; 32 /// The size in bytes of an address on the target architecture. For segmented 33 /// addressing, this is the size of the offset portion of the address. 34 uint8_t AddrSize; 35 /// The size in bytes of a segment descriptor on the target architecture. 36 /// If the target system uses a flat address space, this value is 0. 37 uint8_t SegSize; 38 }; 39 40 struct Descriptor { 41 uint64_t Address; 42 uint64_t Length; 43 44 uint64_t getEndAddress() const { return Address + Length; } 45 void dump(raw_ostream &OS, uint32_t AddressSize) const; 46 }; 47 48 private: 49 using DescriptorColl = std::vector<Descriptor>; 50 using desc_iterator_range = iterator_range<DescriptorColl::const_iterator>; 51 52 uint64_t Offset; 53 Header HeaderData; 54 DescriptorColl ArangeDescriptors; 55 56 public: 57 DWARFDebugArangeSet() { clear(); } 58 59 void clear(); 60 bool extract(DataExtractor data, uint64_t *offset_ptr); 61 void dump(raw_ostream &OS) const; 62 63 uint32_t getCompileUnitDIEOffset() const { return HeaderData.CuOffset; } 64 65 const Header &getHeader() const { return HeaderData; } 66 67 desc_iterator_range descriptors() const { 68 return desc_iterator_range(ArangeDescriptors.begin(), 69 ArangeDescriptors.end()); 70 } 71 }; 72 73 } // end namespace llvm 74 75 #endif // LLVM_DEBUGINFO_DWARFDEBUGARANGESET_H 76