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 #include "llvm/Support/ManagedStatic.h" 17 18 using namespace llvm; 19 using namespace object; 20 21 namespace { 22 // FIXME: This class is only here to support the transition to llvm::Error. It 23 // will be removed once this transition is complete. Clients should prefer to 24 // deal with the Error value directly, rather than converting to error_code. 25 class _object_error_category : public std::error_category { 26 public: 27 const char* name() const noexcept override; 28 std::string message(int ev) const override; 29 }; 30 } 31 32 const char *_object_error_category::name() const noexcept { 33 return "llvm.object"; 34 } 35 36 std::string _object_error_category::message(int EV) const { 37 object_error E = static_cast<object_error>(EV); 38 switch (E) { 39 case object_error::arch_not_found: 40 return "No object file for requested architecture"; 41 case object_error::invalid_file_type: 42 return "The file was not recognized as a valid object file"; 43 case object_error::parse_failed: 44 return "Invalid data was encountered while parsing the file"; 45 case object_error::unexpected_eof: 46 return "The end of the file was unexpectedly encountered"; 47 case object_error::string_table_non_null_end: 48 return "String table must end with a null terminator"; 49 case object_error::invalid_section_index: 50 return "Invalid section index"; 51 case object_error::bitcode_section_not_found: 52 return "Bitcode section not found in object file"; 53 case object_error::invalid_symbol_index: 54 return "Invalid symbol index"; 55 } 56 llvm_unreachable("An enumerator of object_error does not have a message " 57 "defined."); 58 } 59 60 void BinaryError::anchor() {} 61 char BinaryError::ID = 0; 62 char GenericBinaryError::ID = 0; 63 64 GenericBinaryError::GenericBinaryError(const Twine &Msg) : Msg(Msg.str()) {} 65 66 GenericBinaryError::GenericBinaryError(const Twine &Msg, 67 object_error ECOverride) 68 : Msg(Msg.str()) { 69 setErrorCode(make_error_code(ECOverride)); 70 } 71 72 void GenericBinaryError::log(raw_ostream &OS) const { 73 OS << Msg; 74 } 75 76 static ManagedStatic<_object_error_category> error_category; 77 78 const std::error_category &object::object_category() { 79 return *error_category; 80 } 81 82 llvm::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