contrib/llvm/tools/llvm-xray/func-id-helper.h

   1 //===- func-id-helper.h - XRay Function ID Conversion Helpers -------------===//
   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 // Defines helper tools dealing with XRay-generated function ids.
  11 //
  12 //===----------------------------------------------------------------------===//
  13 #ifndef LLVM_TOOLS_LLVM_XRAY_FUNC_ID_HELPER_H
  14 #define LLVM_TOOLS_LLVM_XRAY_FUNC_ID_HELPER_H
  15
  16 #include "llvm/ADT/DenseMap.h"
  17 #include "llvm/DebugInfo/Symbolize/Symbolize.h"
  18 #include <unordered_map>
  19
  20 namespace llvm {
  21 namespace xray {
  22
  23 // This class consolidates common operations related to Function IDs.
  24 class FuncIdConversionHelper {
  25 public:
  26   using FunctionAddressMap = std::unordered_map<int32_t, uint64_t>;
  27
  28 private:
  29   std::string BinaryInstrMap;
  30   symbolize::LLVMSymbolizer &Symbolizer;
  31   const FunctionAddressMap &FunctionAddresses;
  32   mutable llvm::DenseMap<int32_t, std::string> CachedNames;
  33
  34 public:
  35   FuncIdConversionHelper(std::string BinaryInstrMap,
  36                          symbolize::LLVMSymbolizer &Symbolizer,
  37                          const FunctionAddressMap &FunctionAddresses)
  38       : BinaryInstrMap(std::move(BinaryInstrMap)), Symbolizer(Symbolizer),
  39         FunctionAddresses(FunctionAddresses) {}
  40
  41   // Returns the symbol or a string representation of the function id.
  42   std::string SymbolOrNumber(int32_t FuncId) const;
  43
  44   // Returns the file and column from debug info for the given function id.
  45   std::string FileLineAndColumn(int32_t FuncId) const;
  46 };
  47
  48 } // namespace xray
  49 } // namespace llvm
  50
  51 #endif // LLVM_TOOLS_LLVM_XRAY_FUNC_ID_HELPER_H