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annotate lib/Object/Error.cpp @ 147:c2174574ed3a

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LLVM 10
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 14 Aug 2019 16:55:33 +0900
parents 1172e4bd9c6f
children
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1 //===- Error.cpp - system_error extensions for Object -----------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // This defines a new error_category for the Object library.
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10 //
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11 //===----------------------------------------------------------------------===//
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12
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13 #include "llvm/Object/Error.h"
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14 #include "llvm/Support/ErrorHandling.h"
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15 #include "llvm/Support/ManagedStatic.h"
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16
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17 using namespace llvm;
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18 using namespace object;
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19
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20 namespace {
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21 // FIXME: This class is only here to support the transition to llvm::Error. It
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22 // will be removed once this transition is complete. Clients should prefer to
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23 // deal with the Error value directly, rather than converting to error_code.
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24 class _object_error_category : public std::error_category {
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25 public:
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26 const char* name() const noexcept override;
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27 std::string message(int ev) const override;
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28 };
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29 }
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30
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31 const char *_object_error_category::name() const noexcept {
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32 return "llvm.object";
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33 }
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34
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35 std::string _object_error_category::message(int EV) const {
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36 object_error E = static_cast<object_error>(EV);
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37 switch (E) {
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38 case object_error::arch_not_found:
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39 return "No object file for requested architecture";
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40 case object_error::invalid_file_type:
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41 return "The file was not recognized as a valid object file";
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42 case object_error::parse_failed:
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43 return "Invalid data was encountered while parsing the file";
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44 case object_error::unexpected_eof:
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45 return "The end of the file was unexpectedly encountered";
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46 case object_error::string_table_non_null_end:
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47 return "String table must end with a null terminator";
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48 case object_error::invalid_section_index:
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49 return "Invalid section index";
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50 case object_error::bitcode_section_not_found:
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51 return "Bitcode section not found in object file";
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52 case object_error::invalid_symbol_index:
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53 return "Invalid symbol index";
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54 }
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55 llvm_unreachable("An enumerator of object_error does not have a message "
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56 "defined.");
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57 }
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58
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59 void BinaryError::anchor() {}
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60 char BinaryError::ID = 0;
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61 char GenericBinaryError::ID = 0;
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63 GenericBinaryError::GenericBinaryError(Twine Msg) : Msg(Msg.str()) {}
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64
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65 GenericBinaryError::GenericBinaryError(Twine Msg, object_error ECOverride)
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66 : Msg(Msg.str()) {
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67 setErrorCode(make_error_code(ECOverride));
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68 }
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69
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70 void GenericBinaryError::log(raw_ostream &OS) const {
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71 OS << Msg;
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72 }
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73
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74 static ManagedStatic<_object_error_category> error_category;
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75
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76 const std::error_category &object::object_category() {
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77 return *error_category;
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78 }
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80 llvm::Error llvm::object::isNotObjectErrorInvalidFileType(llvm::Error Err) {
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81 return handleErrors(std::move(Err), [](std::unique_ptr<ECError> M) -> Error {
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82 // Try to handle 'M'. If successful, return a success value from
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83 // the handler.
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84 if (M->convertToErrorCode() == object_error::invalid_file_type)
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85 return Error::success();
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86
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87 // We failed to handle 'M' - return it from the handler.
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88 // This value will be passed back from catchErrors and
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89 // wind up in Err2, where it will be returned from this function.
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90 return Error(std::move(M));
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91 });
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92 }