| //===----- lib/Support/Error.cpp - Error and associated utilities ---------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Support/Error.h" |
| #include "llvm/ADT/Twine.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include <system_error> |
| |
| using namespace llvm; |
| |
| namespace { |
| |
| enum class ErrorErrorCode : int { |
| MultipleErrors = 1, |
| FileError, |
| InconvertibleError |
| }; |
| |
| // FIXME: This class is only here to support the transition to llvm::Error. It |
| // will be removed once this transition is complete. Clients should prefer to |
| // deal with the Error value directly, rather than converting to error_code. |
| class ErrorErrorCategory : public std::error_category { |
| public: |
| const char *name() const noexcept override { return "Error"; } |
| |
| std::string message(int condition) const override { |
| switch (static_cast<ErrorErrorCode>(condition)) { |
| case ErrorErrorCode::MultipleErrors: |
| return "Multiple errors"; |
| case ErrorErrorCode::InconvertibleError: |
| return "Inconvertible error value. An error has occurred that could " |
| "not be converted to a known std::error_code. Please file a " |
| "bug."; |
| case ErrorErrorCode::FileError: |
| return "A file error occurred."; |
| } |
| llvm_unreachable("Unhandled error code"); |
| } |
| }; |
| |
| } |
| |
| ErrorErrorCategory &getErrorErrorCat() { |
| static ErrorErrorCategory ErrorErrorCat; |
| return ErrorErrorCat; |
| } |
| |
| namespace llvm { |
| |
| void ErrorInfoBase::anchor() {} |
| char ErrorInfoBase::ID = 0; |
| char ErrorList::ID = 0; |
| void ECError::anchor() {} |
| char ECError::ID = 0; |
| char StringError::ID = 0; |
| char FileError::ID = 0; |
| |
| void logAllUnhandledErrors(Error E, raw_ostream &OS, Twine ErrorBanner) { |
| if (!E) |
| return; |
| OS << ErrorBanner; |
| handleAllErrors(std::move(E), [&](const ErrorInfoBase &EI) { |
| EI.log(OS); |
| OS << "\n"; |
| }); |
| } |
| |
| |
| std::error_code ErrorList::convertToErrorCode() const { |
| return std::error_code(static_cast<int>(ErrorErrorCode::MultipleErrors), |
| getErrorErrorCat()); |
| } |
| |
| std::error_code inconvertibleErrorCode() { |
| return std::error_code(static_cast<int>(ErrorErrorCode::InconvertibleError), |
| getErrorErrorCat()); |
| } |
| |
| std::error_code FileError::convertToErrorCode() const { |
| std::error_code NestedEC = Err->convertToErrorCode(); |
| if (NestedEC == inconvertibleErrorCode()) |
| return std::error_code(static_cast<int>(ErrorErrorCode::FileError), |
| getErrorErrorCat()); |
| return NestedEC; |
| } |
| |
| Error errorCodeToError(std::error_code EC) { |
| if (!EC) |
| return Error::success(); |
| return Error(std::make_unique<ECError>(ECError(EC))); |
| } |
| |
| std::error_code errorToErrorCode(Error Err) { |
| std::error_code EC; |
| handleAllErrors(std::move(Err), [&](const ErrorInfoBase &EI) { |
| EC = EI.convertToErrorCode(); |
| }); |
| if (EC == inconvertibleErrorCode()) |
| report_fatal_error(Twine(EC.message())); |
| return EC; |
| } |
| |
| #if LLVM_ENABLE_ABI_BREAKING_CHECKS |
| void Error::fatalUncheckedError() const { |
| dbgs() << "Program aborted due to an unhandled Error:\n"; |
| if (getPtr()) { |
| getPtr()->log(dbgs()); |
| dbgs() << "\n"; |
| }else |
| dbgs() << "Error value was Success. (Note: Success values must still be " |
| "checked prior to being destroyed).\n"; |
| abort(); |
| } |
| #endif |
| |
| StringError::StringError(std::error_code EC, const Twine &S) |
| : Msg(S.str()), EC(EC) {} |
| |
| StringError::StringError(const Twine &S, std::error_code EC) |
| : Msg(S.str()), EC(EC), PrintMsgOnly(true) {} |
| |
| void StringError::log(raw_ostream &OS) const { |
| if (PrintMsgOnly) { |
| OS << Msg; |
| } else { |
| OS << EC.message(); |
| if (!Msg.empty()) |
| OS << (" " + Msg); |
| } |
| } |
| |
| std::error_code StringError::convertToErrorCode() const { |
| return EC; |
| } |
| |
| Error createStringError(std::error_code EC, char const *Msg) { |
| return make_error<StringError>(Msg, EC); |
| } |
| |
| void report_fatal_error(Error Err, bool GenCrashDiag) { |
| assert(Err && "report_fatal_error called with success value"); |
| std::string ErrMsg; |
| { |
| raw_string_ostream ErrStream(ErrMsg); |
| logAllUnhandledErrors(std::move(Err), ErrStream); |
| } |
| report_fatal_error(Twine(ErrMsg)); |
| } |
| |
| } // end namespace llvm |
| |
| LLVMErrorTypeId LLVMGetErrorTypeId(LLVMErrorRef Err) { |
| return reinterpret_cast<ErrorInfoBase *>(Err)->dynamicClassID(); |
| } |
| |
| void LLVMConsumeError(LLVMErrorRef Err) { consumeError(unwrap(Err)); } |
| |
| char *LLVMGetErrorMessage(LLVMErrorRef Err) { |
| std::string Tmp = toString(unwrap(Err)); |
| char *ErrMsg = new char[Tmp.size() + 1]; |
| memcpy(ErrMsg, Tmp.data(), Tmp.size()); |
| ErrMsg[Tmp.size()] = '\0'; |
| return ErrMsg; |
| } |
| |
| void LLVMDisposeErrorMessage(char *ErrMsg) { delete[] ErrMsg; } |
| |
| LLVMErrorTypeId LLVMGetStringErrorTypeId() { |
| return reinterpret_cast<void *>(&StringError::ID); |
| } |
| |
| LLVMErrorRef LLVMCreateStringError(const char *ErrMsg) { |
| return wrap(make_error<StringError>(ErrMsg, inconvertibleErrorCode())); |
| } |