LLVM  14.0.0git
Error.h
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1 //===- Error.h - 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 declares a new error_category for the Object library.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_OBJECT_ERROR_H
14 #define LLVM_OBJECT_ERROR_H
15 
16 #include "llvm/Support/Error.h"
17 #include <system_error>
18 
19 namespace llvm {
20 
21 class Twine;
22 
23 namespace object {
24 
26 
27 enum class object_error {
28  // Error code 0 is absent. Use std::error_code() instead.
29  arch_not_found = 1,
37 };
38 
39 inline std::error_code make_error_code(object_error e) {
40  return std::error_code(static_cast<int>(e), object_category());
41 }
42 
43 /// Base class for all errors indicating malformed binary files.
44 ///
45 /// Having a subclass for all malformed binary files allows archive-walking
46 /// code to skip malformed files without having to understand every possible
47 /// way that a binary file might be malformed.
48 ///
49 /// Currently inherits from ECError for easy interoperability with
50 /// std::error_code, but this will be removed in the future.
51 class BinaryError : public ErrorInfo<BinaryError, ECError> {
52  void anchor() override;
53 public:
54  static char ID;
56  // Default to parse_failed, can be overridden with setErrorCode.
58  }
59 };
60 
61 /// Generic binary error.
62 ///
63 /// For errors that don't require their own specific sub-error (most errors)
64 /// this class can be used to describe the error via a string message.
65 class GenericBinaryError : public ErrorInfo<GenericBinaryError, BinaryError> {
66 public:
67  static char ID;
68  GenericBinaryError(const Twine &Msg);
69  GenericBinaryError(const Twine &Msg, object_error ECOverride);
70  const std::string &getMessage() const { return Msg; }
71  void log(raw_ostream &OS) const override;
72 private:
73  std::string Msg;
74 };
75 
76 /// isNotObjectErrorInvalidFileType() is used when looping through the children
77 /// of an archive after calling getAsBinary() on the child and it returns an
78 /// llvm::Error. In the cases we want to loop through the children and ignore the
79 /// non-objects in the archive this is used to test the error to see if an
80 /// error() function needs to called on the llvm::Error.
82 
83 inline Error createError(const Twine &Err) {
84  return make_error<StringError>(Err, object_error::parse_failed);
85 }
86 
87 } // end namespace object.
88 
89 } // end namespace llvm.
90 
91 namespace std {
92 template <>
93 struct is_error_code_enum<llvm::object::object_error> : std::true_type {};
94 }
95 
96 #endif
llvm::object::object_error::unexpected_eof
@ unexpected_eof
llvm
This is an optimization pass for GlobalISel generic memory operations.
Definition: AllocatorList.h:23
llvm::object::object_error::bitcode_section_not_found
@ bitcode_section_not_found
llvm::object::GenericBinaryError::ID
static char ID
Definition: Error.h:67
Error.h
llvm::object::object_error::invalid_symbol_index
@ invalid_symbol_index
llvm::object::make_error_code
std::error_code make_error_code(object_error e)
Definition: Error.h:39
llvm::object::GenericBinaryError::log
void log(raw_ostream &OS) const override
Definition: Error.cpp:72
llvm::object::object_error
object_error
Definition: Error.h:27
llvm::raw_ostream
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:53
llvm::object::BinaryError::ID
static char ID
Definition: Error.h:54
llvm::object::object_error::parse_failed
@ parse_failed
llvm::object::object_error::invalid_file_type
@ invalid_file_type
llvm::object::GenericBinaryError
Generic binary error.
Definition: Error.h:65
llvm::ECError::setErrorCode
void setErrorCode(std::error_code EC)
Definition: Error.h:1149
object
bar al al movzbl eax ret Missed when stored in a memory object
Definition: README.txt:1411
llvm::object::object_error::string_table_non_null_end
@ string_table_non_null_end
llvm::numbers::e
constexpr double e
Definition: MathExtras.h:57
llvm::object::BinaryError::BinaryError
BinaryError()
Definition: Error.h:55
llvm::ErrorInfo
Base class for user error types.
Definition: Error.h:349
llvm::object::object_category
const std::error_category & object_category()
Definition: Error.cpp:78
llvm::object::object_error::invalid_section_index
@ invalid_section_index
llvm::object::BinaryError
Base class for all errors indicating malformed binary files.
Definition: Error.h:51
llvm::object::isNotObjectErrorInvalidFileType
Error isNotObjectErrorInvalidFileType(llvm::Error Err)
isNotObjectErrorInvalidFileType() is used when looping through the children of an archive after calli...
Definition: Error.cpp:82
llvm::Twine
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:83
std
Definition: BitVector.h:838
llvm::Error
Lightweight error class with error context and mandatory checking.
Definition: Error.h:157
llvm::object::GenericBinaryError::getMessage
const std::string & getMessage() const
Definition: Error.h:70
llvm::object::object_error::arch_not_found
@ arch_not_found
llvm::object::createError
Error createError(const Twine &Err)
Definition: Error.h:83
error_category
static ManagedStatic< _object_error_category > error_category
Definition: Error.cpp:76
llvm::object::GenericBinaryError::GenericBinaryError
GenericBinaryError(const Twine &Msg)
Definition: Error.cpp:64