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 #include "llvm/Support/ManagedStatic.h"
  12
  13 using namespace llvm;
  14 using namespace llvm::pdb;
  15
  16 namespace {
  17 // FIXME: This class is only here to support the transition to llvm::Error. It
  18 // will be removed once this transition is complete. Clients should prefer to
  19 // deal with the Error value directly, rather than converting to error_code.
  20 class PDBErrorCategory : public std::error_category {
  21 public:
  22   const char *name() const noexcept override { return "llvm.pdb"; }
  23   std::string message(int Condition) const override {
  24     switch (static_cast<pdb_error_code>(Condition)) {
  25     case pdb_error_code::unspecified:
  26       return "An unknown error has occurred.";
  27     case pdb_error_code::dia_sdk_not_present:
  28       return "LLVM was not compiled with support for DIA. This usually means "
  29              "that you are not using MSVC, or your Visual Studio "
  30              "installation is corrupt.";
  31     case pdb_error_code::dia_failed_loading:
  32       return "DIA is only supported when using MSVC.";
  33     case pdb_error_code::invalid_utf8_path:
  34       return "The PDB file path is an invalid UTF8 sequence.";
  35     case pdb_error_code::signature_out_of_date:
  36       return "The signature does not match; the file(s) might be out of date.";
  37     case pdb_error_code::no_matching_pch:
  38       return "No matching precompiled header could be located.";
  39     }
  40     llvm_unreachable("Unrecognized generic_error_code");
  41   }
  42 };
  43 } // namespace
  44
  45 static llvm::ManagedStatic<PDBErrorCategory> PDBCategory;
  46 const std::error_category &llvm::pdb::PDBErrCategory() { return *PDBCategory; }
  47
  48 char PDBError::ID;