95 lines · cpp
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-exception6//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 17using namespace llvm;18using namespace object;19 20namespace {21// FIXME: This class is only here to support the transition to llvm::Error. It22// will be removed once this transition is complete. Clients should prefer to23// deal with the Error value directly, rather than converting to error_code.24class _object_error_category : public std::error_category {25public:26 const char* name() const noexcept override;27 std::string message(int ev) const override;28};29}30 31const char *_object_error_category::name() const noexcept {32 return "llvm.object";33}34 35std::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 61void BinaryError::anchor() {}62char BinaryError::ID = 0;63char GenericBinaryError::ID = 0;64 65GenericBinaryError::GenericBinaryError(const Twine &Msg) : Msg(Msg.str()) {}66 67GenericBinaryError::GenericBinaryError(const Twine &Msg,68 object_error ECOverride)69 : Msg(Msg.str()) {70 setErrorCode(make_error_code(ECOverride));71}72 73void GenericBinaryError::log(raw_ostream &OS) const {74 OS << Msg;75}76 77const std::error_category &object::object_category() {78 static _object_error_category error_category;79 return error_category;80}81 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 from85 // 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 and91 // wind up in Err2, where it will be returned from this function.92 return Error(std::move(M));93 });94}95