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annotate lib/Object/Error.cpp @ 120:1172e4bd9c6f

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update 4.0.0
author mir3636
date Fri, 25 Nov 2016 19:14:25 +0900
parents afa8332a0e37
children c2174574ed3a
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1 //===- Error.cpp - system_error extensions for Object -----------*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This defines a new error_category for the Object library.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #include "llvm/Object/Error.h"
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15 #include "llvm/Support/ErrorHandling.h"
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16 #include "llvm/Support/ManagedStatic.h"
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17
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18 using namespace llvm;
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19 using namespace object;
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20
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21 namespace {
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22 // FIXME: This class is only here to support the transition to llvm::Error. It
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23 // will be removed once this transition is complete. Clients should prefer to
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24 // deal with the Error value directly, rather than converting to error_code.
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25 class _object_error_category : public std::error_category {
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26 public:
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27 const char* name() const noexcept override;
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28 std::string message(int ev) const override;
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29 };
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30 }
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31
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32 const char *_object_error_category::name() const noexcept {
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33 return "llvm.object";
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34 }
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35
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36 std::string _object_error_category::message(int EV) const {
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37 object_error E = static_cast<object_error>(EV);
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38 switch (E) {
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39 case object_error::arch_not_found:
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40 return "No object file for requested architecture";
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41 case object_error::invalid_file_type:
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42 return "The file was not recognized as a valid object file";
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43 case object_error::parse_failed:
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44 return "Invalid data was encountered while parsing the file";
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45 case object_error::unexpected_eof:
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46 return "The end of the file was unexpectedly encountered";
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47 case object_error::string_table_non_null_end:
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48 return "String table must end with a null terminator";
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49 case object_error::invalid_section_index:
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50 return "Invalid section index";
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51 case object_error::bitcode_section_not_found:
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52 return "Bitcode section not found in object file";
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53 case object_error::invalid_symbol_index:
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54 return "Invalid symbol index";
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55 }
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56 llvm_unreachable("An enumerator of object_error does not have a message "
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57 "defined.");
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58 }
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59
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60 char BinaryError::ID = 0;
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61 char GenericBinaryError::ID = 0;
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62
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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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79
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80 llvm::Error llvm::object::isNotObjectErrorInvalidFileType(llvm::Error Err) {
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81 if (auto Err2 =
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82 handleErrors(std::move(Err), [](std::unique_ptr<ECError> M) -> Error {
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83 // Try to handle 'M'. If successful, return a success value from
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84 // the handler.
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85 if (M->convertToErrorCode() == object_error::invalid_file_type)
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86 return Error::success();
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87
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88 // We failed to handle 'M' - return it from the handler.
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89 // This value will be passed back from catchErrors and
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90 // wind up in Err2, where it will be returned from this function.
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91 return Error(std::move(M));
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92 }))
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93 return Err2;
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94 return Err;
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95 }