1 //===- Error.cpp - system_error extensions for Object -----------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This defines a new error_category for the Object library. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/Object/Error.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 LLVM_NOEXCEPT override; 28 std::string message(int ev) const override; 29 }; 30 } 31 32 const char *_object_error_category::name() const LLVM_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 } 54 llvm_unreachable("An enumerator of object_error does not have a message " 55 "defined."); 56 } 57 58 char BinaryError::ID = 0; 59 char GenericBinaryError::ID = 0; 60 61 GenericBinaryError::GenericBinaryError(Twine Msg) : Msg(Msg.str()) {} 62 63 GenericBinaryError::GenericBinaryError(Twine Msg, object_error ECOverride) 64 : Msg(Msg.str()) { 65 setErrorCode(make_error_code(ECOverride)); 66 } 67 68 void GenericBinaryError::log(raw_ostream &OS) const { 69 OS << Msg; 70 } 71 72 static ManagedStatic<_object_error_category> error_category; 73 74 const std::error_category &object::object_category() { 75 return *error_category; 76 } 77 78 llvm::Error llvm::object::isNotObjectErrorInvalidFileType(llvm::Error Err) { 79 if (auto Err2 = 80 handleErrors(std::move(Err), 81 [](std::unique_ptr<ECError> M) { 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 return Err2; 93 return Err; 94 } 95
