1 //===- DWARFDebugAranges.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_DWARF_DWARFDEBUGARANGES_H 10 #define LLVM_DEBUGINFO_DWARF_DWARFDEBUGARANGES_H 11 12 #include "llvm/ADT/DenseSet.h" 13 #include "llvm/ADT/STLFunctionalExtras.h" 14 #include <cstdint> 15 #include <vector> 16 17 namespace llvm { 18 class DWARFDataExtractor; 19 class Error; 20 21 class DWARFContext; 22 23 class DWARFDebugAranges { 24 public: 25 void generate(DWARFContext *CTX); 26 uint64_t findAddress(uint64_t Address) const; 27 28 private: 29 void clear(); 30 void extract(DWARFDataExtractor DebugArangesData, 31 function_ref<void(Error)> RecoverableErrorHandler, 32 function_ref<void(Error)> WarningHandler); 33 34 /// Call appendRange multiple times and then call construct. 35 void appendRange(uint64_t CUOffset, uint64_t LowPC, uint64_t HighPC); 36 void construct(); 37 38 struct Range { RangeRange39 explicit Range(uint64_t LowPC, uint64_t HighPC, uint64_t CUOffset) 40 : LowPC(LowPC), Length(HighPC - LowPC), CUOffset(CUOffset) {} 41 setHighPCRange42 void setHighPC(uint64_t HighPC) { 43 if (HighPC == -1ULL || HighPC <= LowPC) 44 Length = 0; 45 else 46 Length = HighPC - LowPC; 47 } 48 HighPCRange49 uint64_t HighPC() const { 50 if (Length) 51 return LowPC + Length; 52 return -1ULL; 53 } 54 55 bool operator<(const Range &other) const { 56 return LowPC < other.LowPC; 57 } 58 59 uint64_t LowPC; /// Start of address range. 60 uint64_t Length; /// End of address range (not including this address). 61 uint64_t CUOffset; /// Offset of the compile unit or die. 62 }; 63 64 struct RangeEndpoint { 65 uint64_t Address; 66 uint64_t CUOffset; 67 bool IsRangeStart; 68 RangeEndpointRangeEndpoint69 RangeEndpoint(uint64_t Address, uint64_t CUOffset, bool IsRangeStart) 70 : Address(Address), CUOffset(CUOffset), IsRangeStart(IsRangeStart) {} 71 72 bool operator<(const RangeEndpoint &Other) const { 73 return Address < Other.Address; 74 } 75 }; 76 77 using RangeColl = std::vector<Range>; 78 using RangeCollIterator = RangeColl::const_iterator; 79 80 std::vector<RangeEndpoint> Endpoints; 81 RangeColl Aranges; 82 DenseSet<uint64_t> ParsedCUOffsets; 83 }; 84 85 } // end namespace llvm 86 87 #endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGARANGES_H 88