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//===- Error.h - system_error extensions for Object -------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This declares a new error_category for the Object library.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_OBJECT_ERROR_H
#define LLVM_OBJECT_ERROR_H
#include "llvm/Support/Error.h"
#include <system_error>
namespace llvm {
class Twine;
namespace object {
const std::error_category &object_category();
enum class object_error {
// Error code 0 is absent. Use std::error_code() instead.
arch_not_found = 1,
invalid_file_type,
parse_failed,
unexpected_eof,
string_table_non_null_end,
invalid_section_index,
bitcode_section_not_found,
invalid_symbol_index,
section_stripped,
};
inline std::error_code make_error_code(object_error e) {
return std::error_code(static_cast<int>(e), object_category());
}
/// Base class for all errors indicating malformed binary files.
///
/// Having a subclass for all malformed binary files allows archive-walking
/// code to skip malformed files without having to understand every possible
/// way that a binary file might be malformed.
///
/// Currently inherits from ECError for easy interoperability with
/// std::error_code, but this will be removed in the future.
class BinaryError : public ErrorInfo<BinaryError, ECError> {
void anchor() override;
public:
static char ID;
BinaryError() {
// Default to parse_failed, can be overridden with setErrorCode.
setErrorCode(make_error_code(object_error::parse_failed));
}
};
/// Generic binary error.
///
/// For errors that don't require their own specific sub-error (most errors)
/// this class can be used to describe the error via a string message.
class GenericBinaryError : public ErrorInfo<GenericBinaryError, BinaryError> {
public:
static char ID;
GenericBinaryError(const Twine &Msg);
GenericBinaryError(const Twine &Msg, object_error ECOverride);
const std::string &getMessage() const { return Msg; }
void log(raw_ostream &OS) const override;
private:
std::string Msg;
};
/// isNotObjectErrorInvalidFileType() is used when looping through the children
/// of an archive after calling getAsBinary() on the child and it returns an
/// llvm::Error. In the cases we want to loop through the children and ignore the
/// non-objects in the archive this is used to test the error to see if an
/// error() function needs to called on the llvm::Error.
Error isNotObjectErrorInvalidFileType(llvm::Error Err);
inline Error createError(const Twine &Err) {
return make_error<StringError>(Err, object_error::parse_failed);
}
} // end namespace object.
} // end namespace llvm.
namespace std {
template <>
struct is_error_code_enum<llvm::object::object_error> : std::true_type {};
}
#endif
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