1 //===- Error.cpp - system_error extensions for Object -----------*- 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 // This defines a new error_category for the Object library. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/Object/Error.h" 14 #include "llvm/ADT/Twine.h" 15 #include "llvm/Support/ErrorHandling.h" 16 17 using namespace llvm; 18 using namespace object; 19 20 namespace { 21 // FIXME: This class is only here to support the transition to llvm::Error. It 22 // will be removed once this transition is complete. Clients should prefer to 23 // deal with the Error value directly, rather than converting to error_code. 24 class _object_error_category : public std::error_category { 25 public: 26 const char* name() const noexcept override; 27 std::string message(int ev) const override; 28 }; 29 } 30 name() const31const char *_object_error_category::name() const noexcept { 32 return "llvm.object"; 33 } 34 message(int EV) const35std::string _object_error_category::message(int EV) const { 36 object_error E = static_cast<object_error>(EV); 37 switch (E) { 38 case object_error::arch_not_found: 39 return "No object file for requested architecture"; 40 case object_error::invalid_file_type: 41 return "The file was not recognized as a valid object file"; 42 case object_error::parse_failed: 43 return "Invalid data was encountered while parsing the file"; 44 case object_error::unexpected_eof: 45 return "The end of the file was unexpectedly encountered"; 46 case object_error::string_table_non_null_end: 47 return "String table must end with a null terminator"; 48 case object_error::invalid_section_index: 49 return "Invalid section index"; 50 case object_error::bitcode_section_not_found: 51 return "Bitcode section not found in object file"; 52 case object_error::invalid_symbol_index: 53 return "Invalid symbol index"; 54 case object_error::section_stripped: 55 return "Section has been stripped from the object file"; 56 } 57 llvm_unreachable("An enumerator of object_error does not have a message " 58 "defined."); 59 } 60 anchor()61void BinaryError::anchor() {} 62 char BinaryError::ID = 0; 63 char GenericBinaryError::ID = 0; 64 GenericBinaryError(const Twine & Msg)65GenericBinaryError::GenericBinaryError(const Twine &Msg) : Msg(Msg.str()) {} 66 GenericBinaryError(const Twine & Msg,object_error ECOverride)67GenericBinaryError::GenericBinaryError(const Twine &Msg, 68 object_error ECOverride) 69 : Msg(Msg.str()) { 70 setErrorCode(make_error_code(ECOverride)); 71 } 72 log(raw_ostream & OS) const73void GenericBinaryError::log(raw_ostream &OS) const { 74 OS << Msg; 75 } 76 object_category()77const std::error_category &object::object_category() { 78 static _object_error_category error_category; 79 return error_category; 80 } 81 isNotObjectErrorInvalidFileType(llvm::Error Err)82llvm::Error llvm::object::isNotObjectErrorInvalidFileType(llvm::Error Err) { 83 return handleErrors(std::move(Err), [](std::unique_ptr<ECError> M) -> Error { 84 // Try to handle 'M'. If successful, return a success value from 85 // the handler. 86 if (M->convertToErrorCode() == object_error::invalid_file_type) 87 return Error::success(); 88 89 // We failed to handle 'M' - return it from the handler. 90 // This value will be passed back from catchErrors and 91 // wind up in Err2, where it will be returned from this function. 92 return Error(std::move(M)); 93 }); 94 } 95