1 //===- Error.cpp - system_error extensions for PDB --------------*- 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 #include "llvm/DebugInfo/PDB/GenericError.h" 11 #include "llvm/Support/ErrorHandling.h" 12 #include "llvm/Support/ManagedStatic.h" 13 14 using namespace llvm; 15 using namespace llvm::pdb; 16 17 namespace { 18 // FIXME: This class is only here to support the transition to llvm::Error. It 19 // will be removed once this transition is complete. Clients should prefer to 20 // deal with the Error value directly, rather than converting to error_code. 21 class GenericErrorCategory : public std::error_category { 22 public: 23 const char *name() const noexcept override { return "llvm.pdb"; } 24 25 std::string message(int Condition) const override { 26 switch (static_cast<generic_error_code>(Condition)) { 27 case generic_error_code::unspecified: 28 return "An unknown error has occurred."; 29 case generic_error_code::type_server_not_found: 30 return "Type server PDB was not found."; 31 case generic_error_code::dia_sdk_not_present: 32 return "LLVM was not compiled with support for DIA. This usually means " 33 "that you are not using MSVC, or your Visual Studio " 34 "installation " 35 "is corrupt."; 36 case generic_error_code::invalid_path: 37 return "Unable to load PDB. Make sure the file exists and is readable."; 38 } 39 llvm_unreachable("Unrecognized generic_error_code"); 40 } 41 }; 42 } // end anonymous namespace 43 44 static ManagedStatic<GenericErrorCategory> Category; 45 46 char GenericError::ID = 0; 47 48 GenericError::GenericError(generic_error_code C) : GenericError(C, "") {} 49 50 GenericError::GenericError(StringRef Context) 51 : GenericError(generic_error_code::unspecified, Context) {} 52 53 GenericError::GenericError(generic_error_code C, StringRef Context) : Code(C) { 54 ErrMsg = "PDB Error: "; 55 std::error_code EC = convertToErrorCode(); 56 if (Code != generic_error_code::unspecified) 57 ErrMsg += EC.message() + " "; 58 if (!Context.empty()) 59 ErrMsg += Context; 60 } 61 62 void GenericError::log(raw_ostream &OS) const { OS << ErrMsg << "\n"; } 63 64 StringRef GenericError::getErrorMessage() const { return ErrMsg; } 65 66 std::error_code GenericError::convertToErrorCode() const { 67 return std::error_code(static_cast<int>(Code), *Category); 68 } 69