llvm/lib/DebugInfo/PDB/GenericError.cpp

   1 //===- Error.cpp - system_error extensions for PDB --------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/DebugInfo/PDB/GenericError.h"
  10 #include "llvm/Support/ErrorHandling.h"
  11
  12 using namespace llvm;
  13 using namespace llvm::pdb;
  14
  15 namespace {
  16 // FIXME: This class is only here to support the transition to llvm::Error. It
  17 // will be removed once this transition is complete. Clients should prefer to
  18 // deal with the Error value directly, rather than converting to error_code.
  19 class PDBErrorCategory : public std::error_category {
  20 public:
  21   const char *name() const noexcept override { return "llvm.pdb"; }
  22   std::string message(int Condition) const override {
  23     switch (static_cast<pdb_error_code>(Condition)) {
  24     case pdb_error_code::unspecified:
  25       return "An unknown error has occurred.";
  26     case pdb_error_code::dia_sdk_not_present:
  27       return "LLVM was not compiled with support for DIA. This usually means "
  28              "that you are not using MSVC, or your Visual Studio "
  29              "installation is corrupt.";
  30     case pdb_error_code::dia_failed_loading:
  31       return "DIA is only supported when using MSVC.";
  32     case pdb_error_code::invalid_utf8_path:
  33       return "The PDB file path is an invalid UTF8 sequence.";
  34     case pdb_error_code::signature_out_of_date:
  35       return "The signature does not match; the file(s) might be out of date.";
  36     case pdb_error_code::no_matching_pch:
  37       return "No matching precompiled header could be located.";
  38     }
  39     llvm_unreachable("Unrecognized generic_error_code");
  40   }
  41 };
  42 } // namespace
  43
  44 const std::error_category &llvm::pdb::PDBErrCategory() {
  45   static PDBErrorCategory PDBCategory;
  46   return PDBCategory;
  47 }
  48
  49 char PDBError::ID;