DIContext.h revision eaad5cdc2a3ac1f8813e9ee72c58428fd5e8bc33
1//===-- DIContext.h ---------------------------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines DIContext, an abstract data structure that holds 11// debug information data. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_DEBUGINFO_DICONTEXT_H 16#define LLVM_DEBUGINFO_DICONTEXT_H 17 18#include "llvm/ADT/DenseMap.h" 19#include "llvm/ADT/SmallString.h" 20#include "llvm/ADT/SmallVector.h" 21#include "llvm/ADT/StringRef.h" 22#include "llvm/Object/ObjectFile.h" 23#include "llvm/Object/RelocVisitor.h" 24#include "llvm/Support/Casting.h" 25#include "llvm/Support/DataTypes.h" 26 27namespace llvm { 28 29class raw_ostream; 30 31/// DILineInfo - a format-neutral container for source line information. 32class DILineInfo { 33 SmallString<16> FileName; 34 SmallString<16> FunctionName; 35 uint32_t Line; 36 uint32_t Column; 37public: 38 DILineInfo() 39 : FileName("<invalid>"), FunctionName("<invalid>"), 40 Line(0), Column(0) {} 41 DILineInfo(StringRef fileName, StringRef functionName, uint32_t line, 42 uint32_t column) 43 : FileName(fileName), FunctionName(functionName), Line(line), 44 Column(column) {} 45 46 const char *getFileName() { return FileName.c_str(); } 47 const char *getFunctionName() { return FunctionName.c_str(); } 48 uint32_t getLine() const { return Line; } 49 uint32_t getColumn() const { return Column; } 50 51 bool operator==(const DILineInfo &RHS) const { 52 return Line == RHS.Line && Column == RHS.Column && 53 FileName.equals(RHS.FileName) && 54 FunctionName.equals(RHS.FunctionName); 55 } 56 bool operator!=(const DILineInfo &RHS) const { 57 return !(*this == RHS); 58 } 59}; 60 61typedef SmallVector<std::pair<uint64_t, DILineInfo>, 16> DILineInfoTable; 62 63/// DIInliningInfo - a format-neutral container for inlined code description. 64class DIInliningInfo { 65 SmallVector<DILineInfo, 4> Frames; 66 public: 67 DIInliningInfo() {} 68 DILineInfo getFrame(unsigned Index) const { 69 assert(Index < Frames.size()); 70 return Frames[Index]; 71 } 72 uint32_t getNumberOfFrames() const { 73 return Frames.size(); 74 } 75 void addFrame(const DILineInfo &Frame) { 76 Frames.push_back(Frame); 77 } 78}; 79 80/// DILineInfoSpecifier - controls which fields of DILineInfo container 81/// should be filled with data. 82class DILineInfoSpecifier { 83 const uint32_t Flags; // Or'ed flags that set the info we want to fetch. 84public: 85 enum Specification { 86 FileLineInfo = 1 << 0, 87 AbsoluteFilePath = 1 << 1, 88 FunctionName = 1 << 2 89 }; 90 // Use file/line info by default. 91 DILineInfoSpecifier(uint32_t flags = FileLineInfo) : Flags(flags) {} 92 bool needs(Specification spec) const { 93 return (Flags & spec) > 0; 94 } 95}; 96 97/// Selects which debug sections get dumped. 98enum DIDumpType { 99 DIDT_Null, 100 DIDT_All, 101 DIDT_Abbrev, 102 DIDT_AbbrevDwo, 103 DIDT_Aranges, 104 DIDT_Frames, 105 DIDT_Info, 106 DIDT_InfoDwo, 107 DIDT_Line, 108 DIDT_Loc, 109 DIDT_Ranges, 110 DIDT_Pubnames, 111 DIDT_GnuPubnames, 112 DIDT_Str, 113 DIDT_StrDwo, 114 DIDT_StrOffsetsDwo 115}; 116 117// In place of applying the relocations to the data we've read from disk we use 118// a separate mapping table to the side and checking that at locations in the 119// dwarf where we expect relocated values. This adds a bit of complexity to the 120// dwarf parsing/extraction at the benefit of not allocating memory for the 121// entire size of the debug info sections. 122typedef DenseMap<uint64_t, std::pair<uint8_t, int64_t> > RelocAddrMap; 123 124class DIContext { 125public: 126 enum DIContextKind { 127 CK_DWARF 128 }; 129 DIContextKind getKind() const { return Kind; } 130 131 DIContext(DIContextKind K) : Kind(K) {} 132 virtual ~DIContext(); 133 134 /// getDWARFContext - get a context for binary DWARF data. 135 static DIContext *getDWARFContext(object::ObjectFile *); 136 137 virtual void dump(raw_ostream &OS, DIDumpType DumpType = DIDT_All) = 0; 138 139 virtual DILineInfo getLineInfoForAddress(uint64_t Address, 140 DILineInfoSpecifier Specifier = DILineInfoSpecifier()) = 0; 141 virtual DILineInfoTable getLineInfoForAddressRange(uint64_t Address, 142 uint64_t Size, DILineInfoSpecifier Specifier = DILineInfoSpecifier()) = 0; 143 virtual DIInliningInfo getInliningInfoForAddress(uint64_t Address, 144 DILineInfoSpecifier Specifier = DILineInfoSpecifier()) = 0; 145private: 146 const DIContextKind Kind; 147}; 148 149} 150 151#endif 152