GenericError.cpp revision 360784 
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
13using namespace llvm;
14using namespace llvm::pdb;
15
16namespace {
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.
20class PDBErrorCategory : public std::error_category {
21public:
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36      return "The signature does not match; the file(s) might be out of date.";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
45static llvm::ManagedStatic<PDBErrorCategory> PDBCategory;
46const std::error_category &llvm::pdb::PDBErrCategory() { return *PDBCategory; }
47
48char PDBError::ID;
49