| //===- Error.cpp - system_error extensions for lld --------------*- C++ -*-===// |
| // |
| // The LLVM Linker |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lld/Core/Error.h" |
| #include "llvm/ADT/Twine.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include <mutex> |
| #include <string> |
| #include <vector> |
| |
| using namespace lld; |
| |
| namespace { |
| class _YamlReaderErrorCategory : public std::error_category { |
| public: |
| const char* name() const noexcept override { |
| return "lld.yaml.reader"; |
| } |
| |
| std::string message(int ev) const override { |
| switch (static_cast<YamlReaderError>(ev)) { |
| case YamlReaderError::unknown_keyword: |
| return "Unknown keyword found in yaml file"; |
| case YamlReaderError::illegal_value: |
| return "Bad value found in yaml file"; |
| } |
| llvm_unreachable("An enumerator of YamlReaderError does not have a " |
| "message defined."); |
| } |
| }; |
| } // end anonymous namespace |
| |
| const std::error_category &lld::YamlReaderCategory() { |
| static _YamlReaderErrorCategory o; |
| return o; |
| } |
| |
| namespace lld { |
| |
| /// Temporary class to enable make_dynamic_error_code() until |
| /// llvm::ErrorOr<> is updated to work with error encapsulations |
| /// other than error_code. |
| class dynamic_error_category : public std::error_category { |
| public: |
| ~dynamic_error_category() override = default; |
| |
| const char *name() const noexcept override { |
| return "lld.dynamic_error"; |
| } |
| |
| std::string message(int ev) const override { |
| assert(ev >= 0); |
| assert(ev < (int)_messages.size()); |
| // The value is an index into the string vector. |
| return _messages[ev]; |
| } |
| |
| int add(std::string msg) { |
| std::lock_guard<std::recursive_mutex> lock(_mutex); |
| // Value zero is always the successs value. |
| if (_messages.empty()) |
| _messages.push_back("Success"); |
| _messages.push_back(msg); |
| // Return the index of the string just appended. |
| return _messages.size() - 1; |
| } |
| |
| private: |
| std::vector<std::string> _messages; |
| std::recursive_mutex _mutex; |
| }; |
| |
| static dynamic_error_category categorySingleton; |
| |
| std::error_code make_dynamic_error_code(StringRef msg) { |
| return std::error_code(categorySingleton.add(msg), categorySingleton); |
| } |
| |
| char GenericError::ID = 0; |
| |
| GenericError::GenericError(Twine Msg) : Msg(Msg.str()) { } |
| |
| void GenericError::log(raw_ostream &OS) const { |
| OS << Msg; |
| } |
| |
| } // namespace lld |