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/Support/ErrorHandling.h" 15 #include "llvm/Support/ManagedStatic.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 31 const char *_object_error_category::name() const noexcept { 32 return "llvm.object"; 33 } 34 35 std::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 } 55 llvm_unreachable("An enumerator of object_error does not have a message " 56 "defined."); 57 } 58 59 void BinaryError::anchor() {} 60 char BinaryError::ID = 0; 61 char GenericBinaryError::ID = 0; 62 63 GenericBinaryError::GenericBinaryError(Twine Msg) : Msg(Msg.str()) {} 64 65 GenericBinaryError::GenericBinaryError(Twine Msg, object_error ECOverride) 66 : Msg(Msg.str()) { 67 setErrorCode(make_error_code(ECOverride)); 68 } 69 70 void GenericBinaryError::log(raw_ostream &OS) const { 71 OS << Msg; 72 } 73 74 static ManagedStatic<_object_error_category> error_category; 75 76 const std::error_category &object::object_category() { 77 return *error_category; 78 } 79 80 llvm::Error llvm::object::isNotObjectErrorInvalidFileType(llvm::Error Err) { 81 return handleErrors(std::move(Err), [](std::unique_ptr<ECError> M) -> Error { 82 // Try to handle 'M'. If successful, return a success value from 83 // the handler. 84 if (M->convertToErrorCode() == object_error::invalid_file_type) 85 return Error::success(); 86 87 // We failed to handle 'M' - return it from the handler. 88 // This value will be passed back from catchErrors and 89 // wind up in Err2, where it will be returned from this function. 90 return Error(std::move(M)); 91 }); 92 } 93