src/llvm/tools/llvm-symbolizer/LLVMSymbolize.h

   1 //===-- LLVMSymbolize.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 // Header for LLVM symbolization library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13 #ifndef LLVM_TOOLS_LLVM_SYMBOLIZER_LLVMSYMBOLIZE_H
  14 #define LLVM_TOOLS_LLVM_SYMBOLIZER_LLVMSYMBOLIZE_H
  15
  16 #include "llvm/ADT/SmallVector.h"
  17 #include "llvm/DebugInfo/DIContext.h"
  18 #include "llvm/Object/MachOUniversal.h"
  19 #include "llvm/Object/ObjectFile.h"
  20 #include "llvm/Support/DataExtractor.h"
  21 #include "llvm/Support/MemoryBuffer.h"
  22 #include <map>
  23 #include <memory>
  24 #include <string>
  25
  26 namespace llvm {
  27
  28 typedef DILineInfoSpecifier::FunctionNameKind FunctionNameKind;
  29 using namespace object;
  30
  31 namespace symbolize {
  32
  33 class ModuleInfo;
  34
  35 class LLVMSymbolizer {
  36 public:
  37   struct Options {
  38     bool UseSymbolTable : 1;
  39     FunctionNameKind PrintFunctions;
  40     bool PrintInlining : 1;
  41     bool Demangle : 1;
  42     std::string DefaultArch;
  43     std::vector<std::string> DsymHints;
  44     Options(bool UseSymbolTable = true,
  45             FunctionNameKind PrintFunctions = FunctionNameKind::LinkageName,
  46             bool PrintInlining = true, bool Demangle = true,
  47             std::string DefaultArch = "")
  48         : UseSymbolTable(UseSymbolTable),
  49           PrintFunctions(PrintFunctions), PrintInlining(PrintInlining),
  50           Demangle(Demangle), DefaultArch(DefaultArch) {}
  51   };
  52
  53   LLVMSymbolizer(const Options &Opts = Options()) : Opts(Opts) {}
  54   ~LLVMSymbolizer() {
  55     flush();
  56   }
  57
  58   // Returns the result of symbolization for module name/offset as
  59   // a string (possibly containing newlines).
  60   std::string
  61   symbolizeCode(const std::string &ModuleName, uint64_t ModuleOffset);
  62   std::string
  63   symbolizeData(const std::string &ModuleName, uint64_t ModuleOffset);
  64   void flush();
  65   static std::string DemangleName(const std::string &Name);
  66 private:
  67   typedef std::pair<ObjectFile*, ObjectFile*> ObjectPair;
  68
  69   ModuleInfo *getOrCreateModuleInfo(const std::string &ModuleName);
  70   ObjectFile *lookUpDsymFile(const std::string &Path, const MachOObjectFile *ExeObj,
  71                              const std::string &ArchName);
  72
  73   /// \brief Returns pair of pointers to object and debug object.
  74   ObjectPair getOrCreateObjects(const std::string &Path,
  75                                 const std::string &ArchName);
  76   /// \brief Returns a parsed object file for a given architecture in a
  77   /// universal binary (or the binary itself if it is an object file).
  78   ObjectFile *getObjectFileFromBinary(Binary *Bin, const std::string &ArchName);
  79
  80   std::string printDILineInfo(DILineInfo LineInfo) const;
  81
  82   // Owns all the parsed binaries and object files.
  83   SmallVector<std::unique_ptr<Binary>, 4> ParsedBinariesAndObjects;
  84   SmallVector<std::unique_ptr<MemoryBuffer>, 4> MemoryBuffers;
  85   void addOwningBinary(OwningBinary<Binary> OwningBin) {
  86     std::unique_ptr<Binary> Bin;
  87     std::unique_ptr<MemoryBuffer> MemBuf;
  88     std::tie(Bin, MemBuf) = OwningBin.takeBinary();
  89     ParsedBinariesAndObjects.push_back(std::move(Bin));
  90     MemoryBuffers.push_back(std::move(MemBuf));
  91   }
  92
  93   // Owns module info objects.
  94   std::map<std::string, ModuleInfo *> Modules;
  95   std::map<std::pair<MachOUniversalBinary *, std::string>, ObjectFile *>
  96       ObjectFileForArch;
  97   std::map<std::pair<std::string, std::string>, ObjectPair>
  98       ObjectPairForPathArch;
  99
 100   Options Opts;
 101   static const char kBadString[];
 102 };
 103
 104 class ModuleInfo {
 105 public:
 106   ModuleInfo(ObjectFile *Obj, DIContext *DICtx);
 107
 108   DILineInfo symbolizeCode(uint64_t ModuleOffset,
 109                            const LLVMSymbolizer::Options &Opts) const;
 110   DIInliningInfo symbolizeInlinedCode(
 111       uint64_t ModuleOffset, const LLVMSymbolizer::Options &Opts) const;
 112   bool symbolizeData(uint64_t ModuleOffset, std::string &Name, uint64_t &Start,
 113                      uint64_t &Size) const;
 114
 115 private:
 116   bool getNameFromSymbolTable(SymbolRef::Type Type, uint64_t Address,
 117                               std::string &Name, uint64_t &Addr,
 118                               uint64_t &Size) const;
 119   // For big-endian PowerPC64 ELF, OpdAddress is the address of the .opd
 120   // (function descriptor) section and OpdExtractor refers to its contents.
 121   void addSymbol(const SymbolRef &Symbol,
 122                  DataExtractor *OpdExtractor = nullptr,
 123                  uint64_t OpdAddress = 0);
 124   ObjectFile *Module;
 125   std::unique_ptr<DIContext> DebugInfoContext;
 126
 127   struct SymbolDesc {
 128     uint64_t Addr;
 129     // If size is 0, assume that symbol occupies the whole memory range up to
 130     // the following symbol.
 131     uint64_t Size;
 132     friend bool operator<(const SymbolDesc &s1, const SymbolDesc &s2) {
 133       return s1.Addr < s2.Addr;
 134     }
 135   };
 136   std::map<SymbolDesc, StringRef> Functions;
 137   std::map<SymbolDesc, StringRef> Objects;
 138 };
 139
 140 } // namespace symbolize
 141 } // namespace llvm
 142
 143 #endif