src/llvm/include/llvm/DebugInfo/DWARFContext.h

   1 //===-- DWARFContext.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 #ifndef LLVM_LIB_DEBUGINFO_DWARFCONTEXT_H
  11 #define LLVM_LIB_DEBUGINFO_DWARFCONTEXT_H
  12
  13 #include "llvm/ADT/MapVector.h"
  14 #include "llvm/ADT/SmallVector.h"
  15 #include "llvm/DebugInfo/DIContext.h"
  16 #include "llvm/DebugInfo/DWARFCompileUnit.h"
  17 #include "llvm/DebugInfo/DWARFDebugAranges.h"
  18 #include "llvm/DebugInfo/DWARFDebugFrame.h"
  19 #include "llvm/DebugInfo/DWARFDebugLine.h"
  20 #include "llvm/DebugInfo/DWARFDebugLoc.h"
  21 #include "llvm/DebugInfo/DWARFDebugRangeList.h"
  22 #include "llvm/DebugInfo/DWARFSection.h"
  23 #include "llvm/DebugInfo/DWARFTypeUnit.h"
  24 #include <vector>
  25
  26 namespace llvm {
  27
  28 /// DWARFContext
  29 /// This data structure is the top level entity that deals with dwarf debug
  30 /// information parsing. The actual data is supplied through pure virtual
  31 /// methods that a concrete implementation provides.
  32 class DWARFContext : public DIContext {
  33
  34   DWARFUnitSection<DWARFCompileUnit> CUs;
  35   std::vector<DWARFUnitSection<DWARFTypeUnit>> TUs;
  36   std::unique_ptr<DWARFDebugAbbrev> Abbrev;
  37   std::unique_ptr<DWARFDebugLoc> Loc;
  38   std::unique_ptr<DWARFDebugAranges> Aranges;
  39   std::unique_ptr<DWARFDebugLine> Line;
  40   std::unique_ptr<DWARFDebugFrame> DebugFrame;
  41
  42   DWARFUnitSection<DWARFCompileUnit> DWOCUs;
  43   std::vector<DWARFUnitSection<DWARFTypeUnit>> DWOTUs;
  44   std::unique_ptr<DWARFDebugAbbrev> AbbrevDWO;
  45   std::unique_ptr<DWARFDebugLocDWO> LocDWO;
  46
  47   DWARFContext(DWARFContext &) LLVM_DELETED_FUNCTION;
  48   DWARFContext &operator=(DWARFContext &) LLVM_DELETED_FUNCTION;
  49
  50   /// Read compile units from the debug_info section (if necessary)
  51   /// and store them in CUs.
  52   void parseCompileUnits();
  53
  54   /// Read type units from the debug_types sections (if necessary)
  55   /// and store them in TUs.
  56   void parseTypeUnits();
  57
  58   /// Read compile units from the debug_info.dwo section (if necessary)
  59   /// and store them in DWOCUs.
  60   void parseDWOCompileUnits();
  61
  62   /// Read type units from the debug_types.dwo section (if necessary)
  63   /// and store them in DWOTUs.
  64   void parseDWOTypeUnits();
  65
  66 public:
  67   DWARFContext() : DIContext(CK_DWARF) {}
  68
  69   static bool classof(const DIContext *DICtx) {
  70     return DICtx->getKind() == CK_DWARF;
  71   }
  72
  73   void dump(raw_ostream &OS, DIDumpType DumpType = DIDT_All) override;
  74
  75   typedef DWARFUnitSection<DWARFCompileUnit>::iterator_range cu_iterator_range;
  76   typedef DWARFUnitSection<DWARFTypeUnit>::iterator_range tu_iterator_range;
  77   typedef iterator_range<std::vector<DWARFUnitSection<DWARFTypeUnit>>::iterator> tu_section_iterator_range;
  78
  79   /// Get compile units in this context.
  80   cu_iterator_range compile_units() {
  81     parseCompileUnits();
  82     return cu_iterator_range(CUs.begin(), CUs.end());
  83   }
  84
  85   /// Get type units in this context.
  86   tu_section_iterator_range type_unit_sections() {
  87     parseTypeUnits();
  88     return tu_section_iterator_range(TUs.begin(), TUs.end());
  89   }
  90
  91   /// Get compile units in the DWO context.
  92   cu_iterator_range dwo_compile_units() {
  93     parseDWOCompileUnits();
  94     return cu_iterator_range(DWOCUs.begin(), DWOCUs.end());
  95   }
  96
  97   /// Get type units in the DWO context.
  98   tu_section_iterator_range dwo_type_unit_sections() {
  99     parseDWOTypeUnits();
 100     return tu_section_iterator_range(DWOTUs.begin(), DWOTUs.end());
 101   }
 102
 103   /// Get the number of compile units in this context.
 104   unsigned getNumCompileUnits() {
 105     parseCompileUnits();
 106     return CUs.size();
 107   }
 108
 109   /// Get the number of compile units in this context.
 110   unsigned getNumTypeUnits() {
 111     parseTypeUnits();
 112     return TUs.size();
 113   }
 114
 115   /// Get the number of compile units in the DWO context.
 116   unsigned getNumDWOCompileUnits() {
 117     parseDWOCompileUnits();
 118     return DWOCUs.size();
 119   }
 120
 121   /// Get the number of compile units in the DWO context.
 122   unsigned getNumDWOTypeUnits() {
 123     parseDWOTypeUnits();
 124     return DWOTUs.size();
 125   }
 126
 127   /// Get the compile unit at the specified index for this compile unit.
 128   DWARFCompileUnit *getCompileUnitAtIndex(unsigned index) {
 129     parseCompileUnits();
 130     return CUs[index].get();
 131   }
 132
 133   /// Get the compile unit at the specified index for the DWO compile units.
 134   DWARFCompileUnit *getDWOCompileUnitAtIndex(unsigned index) {
 135     parseDWOCompileUnits();
 136     return DWOCUs[index].get();
 137   }
 138
 139   /// Get a pointer to the parsed DebugAbbrev object.
 140   const DWARFDebugAbbrev *getDebugAbbrev();
 141
 142   /// Get a pointer to the parsed DebugLoc object.
 143   const DWARFDebugLoc *getDebugLoc();
 144
 145   /// Get a pointer to the parsed dwo abbreviations object.
 146   const DWARFDebugAbbrev *getDebugAbbrevDWO();
 147
 148   /// Get a pointer to the parsed DebugLoc object.
 149   const DWARFDebugLocDWO *getDebugLocDWO();
 150
 151   /// Get a pointer to the parsed DebugAranges object.
 152   const DWARFDebugAranges *getDebugAranges();
 153
 154   /// Get a pointer to the parsed frame information object.
 155   const DWARFDebugFrame *getDebugFrame();
 156
 157   /// Get a pointer to a parsed line table corresponding to a compile unit.
 158   const DWARFDebugLine::LineTable *getLineTableForUnit(DWARFUnit *cu);
 159
 160   DILineInfo getLineInfoForAddress(uint64_t Address,
 161       DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
 162   DILineInfoTable getLineInfoForAddressRange(uint64_t Address, uint64_t Size,
 163       DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
 164   DIInliningInfo getInliningInfoForAddress(uint64_t Address,
 165       DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
 166
 167   virtual bool isLittleEndian() const = 0;
 168   virtual uint8_t getAddressSize() const = 0;
 169   virtual const DWARFSection &getInfoSection() = 0;
 170   typedef MapVector<object::SectionRef, DWARFSection,
 171                     std::map<object::SectionRef, unsigned>> TypeSectionMap;
 172   virtual const TypeSectionMap &getTypesSections() = 0;
 173   virtual StringRef getAbbrevSection() = 0;
 174   virtual const DWARFSection &getLocSection() = 0;
 175   virtual StringRef getARangeSection() = 0;
 176   virtual StringRef getDebugFrameSection() = 0;
 177   virtual const DWARFSection &getLineSection() = 0;
 178   virtual StringRef getStringSection() = 0;
 179   virtual StringRef getRangeSection() = 0;
 180   virtual StringRef getPubNamesSection() = 0;
 181   virtual StringRef getPubTypesSection() = 0;
 182   virtual StringRef getGnuPubNamesSection() = 0;
 183   virtual StringRef getGnuPubTypesSection() = 0;
 184
 185   // Sections for DWARF5 split dwarf proposal.
 186   virtual const DWARFSection &getInfoDWOSection() = 0;
 187   virtual const TypeSectionMap &getTypesDWOSections() = 0;
 188   virtual StringRef getAbbrevDWOSection() = 0;
 189   virtual const DWARFSection &getLineDWOSection() = 0;
 190   virtual const DWARFSection &getLocDWOSection() = 0;
 191   virtual StringRef getStringDWOSection() = 0;
 192   virtual StringRef getStringOffsetDWOSection() = 0;
 193   virtual StringRef getRangeDWOSection() = 0;
 194   virtual StringRef getAddrSection() = 0;
 195   virtual const DWARFSection& getAppleNamesSection() = 0;
 196   virtual const DWARFSection& getAppleTypesSection() = 0;
 197   virtual const DWARFSection& getAppleNamespacesSection() = 0;
 198   virtual const DWARFSection& getAppleObjCSection() = 0;
 199
 200   static bool isSupportedVersion(unsigned version) {
 201     return version == 2 || version == 3 || version == 4;
 202   }
 203 private:
 204   /// Return the compile unit that includes an offset (relative to .debug_info).
 205   DWARFCompileUnit *getCompileUnitForOffset(uint32_t Offset);
 206
 207   /// Return the compile unit which contains instruction with provided
 208   /// address.
 209   DWARFCompileUnit *getCompileUnitForAddress(uint64_t Address);
 210 };
 211
 212 /// DWARFContextInMemory is the simplest possible implementation of a
 213 /// DWARFContext. It assumes all content is available in memory and stores
 214 /// pointers to it.
 215 class DWARFContextInMemory : public DWARFContext {
 216   virtual void anchor();
 217   bool IsLittleEndian;
 218   uint8_t AddressSize;
 219   DWARFSection InfoSection;
 220   TypeSectionMap TypesSections;
 221   StringRef AbbrevSection;
 222   DWARFSection LocSection;
 223   StringRef ARangeSection;
 224   StringRef DebugFrameSection;
 225   DWARFSection LineSection;
 226   StringRef StringSection;
 227   StringRef RangeSection;
 228   StringRef PubNamesSection;
 229   StringRef PubTypesSection;
 230   StringRef GnuPubNamesSection;
 231   StringRef GnuPubTypesSection;
 232
 233   // Sections for DWARF5 split dwarf proposal.
 234   DWARFSection InfoDWOSection;
 235   TypeSectionMap TypesDWOSections;
 236   StringRef AbbrevDWOSection;
 237   DWARFSection LineDWOSection;
 238   DWARFSection LocDWOSection;
 239   StringRef StringDWOSection;
 240   StringRef StringOffsetDWOSection;
 241   StringRef RangeDWOSection;
 242   StringRef AddrSection;
 243   DWARFSection AppleNamesSection;
 244   DWARFSection AppleTypesSection;
 245   DWARFSection AppleNamespacesSection;
 246   DWARFSection AppleObjCSection;
 247
 248   SmallVector<SmallString<32>, 4> UncompressedSections;
 249
 250 public:
 251   DWARFContextInMemory(const object::ObjectFile &Obj);
 252   bool isLittleEndian() const override { return IsLittleEndian; }
 253   uint8_t getAddressSize() const override { return AddressSize; }
 254   const DWARFSection &getInfoSection() override { return InfoSection; }
 255   const TypeSectionMap &getTypesSections() override { return TypesSections; }
 256   StringRef getAbbrevSection() override { return AbbrevSection; }
 257   const DWARFSection &getLocSection() override { return LocSection; }
 258   StringRef getARangeSection() override { return ARangeSection; }
 259   StringRef getDebugFrameSection() override { return DebugFrameSection; }
 260   const DWARFSection &getLineSection() override { return LineSection; }
 261   StringRef getStringSection() override { return StringSection; }
 262   StringRef getRangeSection() override { return RangeSection; }
 263   StringRef getPubNamesSection() override { return PubNamesSection; }
 264   StringRef getPubTypesSection() override { return PubTypesSection; }
 265   StringRef getGnuPubNamesSection() override { return GnuPubNamesSection; }
 266   StringRef getGnuPubTypesSection() override { return GnuPubTypesSection; }
 267   const DWARFSection& getAppleNamesSection() override { return AppleNamesSection; }
 268   const DWARFSection& getAppleTypesSection() override { return AppleTypesSection; }
 269   const DWARFSection& getAppleNamespacesSection() override { return AppleNamespacesSection; }
 270   const DWARFSection& getAppleObjCSection() override { return AppleObjCSection; }
 271
 272   // Sections for DWARF5 split dwarf proposal.
 273   const DWARFSection &getInfoDWOSection() override { return InfoDWOSection; }
 274   const TypeSectionMap &getTypesDWOSections() override {
 275     return TypesDWOSections;
 276   }
 277   StringRef getAbbrevDWOSection() override { return AbbrevDWOSection; }
 278   const DWARFSection &getLineDWOSection() override { return LineDWOSection; }
 279   const DWARFSection &getLocDWOSection() override { return LocDWOSection; }
 280   StringRef getStringDWOSection() override { return StringDWOSection; }
 281   StringRef getStringOffsetDWOSection() override {
 282     return StringOffsetDWOSection;
 283   }
 284   StringRef getRangeDWOSection() override { return RangeDWOSection; }
 285   StringRef getAddrSection() override {
 286     return AddrSection;
 287   }
 288 };
 289
 290 }
 291
 292 #endif