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 case object_error::section_stripped: 56 return "Section has been stripped from the object file"; 57 } 58 llvm_unreachable("An enumerator of object_error does not have a message " 59 "defined."); 60 } 61 62 void BinaryError::anchor() {} 63 char BinaryError::ID = 0; 64 char GenericBinaryError::ID = 0; 65 66 GenericBinaryError::GenericBinaryError(const Twine &Msg) : Msg(Msg.str()) {} 67 68 GenericBinaryError::GenericBinaryError(const Twine &Msg, 69 object_error ECOverride) 70 : Msg(Msg.str()) { 71 setErrorCode(make_error_code(ECOverride)); 72 } 73 74 void GenericBinaryError::log(raw_ostream &OS) const { 75 OS << Msg; 76 } 77 78 static ManagedStatic<_object_error_category> error_category; 79 80 const std::error_category &object::object_category() { 81 return *error_category; 82 } 83 84 llvm::Error llvm::object::isNotObjectErrorInvalidFileType(llvm::Error Err) { 85 return handleErrors(std::move(Err), [](std::unique_ptr<ECError> M) -> Error { 86 // Try to handle 'M'. If successful, return a success value from 87 // the handler. 88 if (M->convertToErrorCode() == object_error::invalid_file_type) 89 return Error::success(); 90 91 // We failed to handle 'M' - return it from the handler. 92 // This value will be passed back from catchErrors and 93 // wind up in Err2, where it will be returned from this function. 94 return Error(std::move(M)); 95 }); 96 } 97