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169 lines
9.2 KiB
C++
169 lines
9.2 KiB
C++
//*********************************************************
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//
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// Copyright (c) Microsoft. All rights reserved.
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// This code is licensed under the MIT License.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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// PARTICULAR PURPOSE AND NONINFRINGEMENT.
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//
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//*********************************************************
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#ifndef __WIL_NT_RESULTMACROS_INCLUDED
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#define __WIL_NT_RESULTMACROS_INCLUDED
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#include "result_macros.h"
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// Helpers for return macros
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#define __NT_RETURN_NTSTATUS(status, str) __WI_SUPPRESS_4127_S do { NTSTATUS __status = (status); if (FAILED_NTSTATUS(__status)) { __R_FN(Return_NtStatus)(__R_INFO(str) __status); } return __status; } __WI_SUPPRESS_4127_E while ((void)0, 0)
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#define __NT_RETURN_NTSTATUS_MSG(status, str, fmt, ...) __WI_SUPPRESS_4127_S do { NTSTATUS __status = (status); if (FAILED_NTSTATUS(__status)) { __R_FN(Return_NtStatusMsg)(__R_INFO(str) __status, fmt, ##__VA_ARGS__); } return __status; } __WI_SUPPRESS_4127_E while ((void)0, 0)
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//*****************************************************************************
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// Macros for returning failures as NTSTATUS
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//*****************************************************************************
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// Always returns a known result (NTSTATUS) - always logs failures
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#define NT_RETURN_NTSTATUS(status) __NT_RETURN_NTSTATUS(wil::verify_ntstatus(status), #status)
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// Always returns a known failure (NTSTATUS) - always logs a var-arg message on failure
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#define NT_RETURN_NTSTATUS_MSG(status, fmt, ...) __NT_RETURN_NTSTATUS_MSG(wil::verify_ntstatus(status), #status, fmt, ##__VA_ARGS__)
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// Conditionally returns failures (NTSTATUS) - always logs failures
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#define NT_RETURN_IF_NTSTATUS_FAILED(status) __WI_SUPPRESS_4127_S do { const auto __statusRet = wil::verify_ntstatus(status); if (FAILED_NTSTATUS(__statusRet)) { __NT_RETURN_NTSTATUS(__statusRet, #status); }} __WI_SUPPRESS_4127_E while ((void)0, 0)
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// Conditionally returns failures (NTSTATUS) - always logs a var-arg message on failure
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#define NT_RETURN_IF_NTSTATUS_FAILED_MSG(status, fmt, ...) __WI_SUPPRESS_4127_S do { const auto __statusRet = wil::verify_ntstatus(status); if (FAILED_NTSTATUS(__statusRet)) { __NT_RETURN_NTSTATUS_MSG(__statusRet, #status, fmt, ##__VA_ARGS__); }} __WI_SUPPRESS_4127_E while((void)0, 0)
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//*****************************************************************************
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// Macros to catch and convert exceptions on failure
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//*****************************************************************************
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// Use these macros *within* a catch (...) block to handle exceptions
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#define NT_RETURN_CAUGHT_EXCEPTION() return __R_FN(Nt_Return_CaughtException)(__R_INFO_ONLY(nullptr))
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#define NT_RETURN_CAUGHT_EXCEPTION_MSG(fmt, ...) return __R_FN(Nt_Return_CaughtExceptionMsg)(__R_INFO(nullptr) fmt, ##__VA_ARGS__)
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// Use these macros in place of a catch block to handle exceptions
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#define NT_CATCH_RETURN() catch (...) { NT_RETURN_CAUGHT_EXCEPTION(); }
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#define NT_CATCH_RETURN_MSG(fmt, ...) catch (...) { NT_RETURN_CAUGHT_EXCEPTION_MSG(fmt, ##__VA_ARGS__); }
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namespace wil
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{
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//*****************************************************************************
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// Public Helpers that catch -- mostly only enabled when exceptions are enabled
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//*****************************************************************************
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// StatusFromCaughtException is a function that is meant to be called from within a catch(...) block. Internally
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// it re-throws and catches the exception to convert it to an NTSTATUS. If an exception is of an unrecognized type
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// the function will fail fast.
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//
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// try
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// {
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// // Code
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// }
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// catch (...)
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// {
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// status = wil::StatusFromCaughtException();
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// }
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_Always_(_Post_satisfies_(return < 0))
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__declspec(noinline) inline NTSTATUS StatusFromCaughtException() WI_NOEXCEPT
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{
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bool isNormalized = false;
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NTSTATUS status = STATUS_SUCCESS;
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if (details::g_pfnResultFromCaughtExceptionInternal)
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{
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status = details::g_pfnResultFromCaughtExceptionInternal(nullptr, 0, &isNormalized).status;
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}
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if (FAILED_NTSTATUS(status))
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{
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return status;
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}
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// Caller bug: an unknown exception was thrown
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__WIL_PRIVATE_FAIL_FAST_HR_IF(__HRESULT_FROM_WIN32(ERROR_UNHANDLED_EXCEPTION), g_fResultFailFastUnknownExceptions);
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return wil::details::HrToNtStatus(__HRESULT_FROM_WIN32(ERROR_UNHANDLED_EXCEPTION));
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}
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namespace details
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{
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template<FailureType>
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__declspec(noinline) inline NTSTATUS ReportStatus_CaughtException(__R_FN_PARAMS_FULL, SupportedExceptions supported = SupportedExceptions::Default);
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template<FailureType>
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__declspec(noinline) inline NTSTATUS ReportStatus_CaughtExceptionMsg(__R_FN_PARAMS_FULL, _Printf_format_string_ PCSTR formatString, va_list argList);
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namespace __R_NS_NAME
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{
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#ifdef WIL_ENABLE_EXCEPTIONS
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__R_DIRECT_METHOD(NTSTATUS, Nt_Return_CaughtException)(__R_DIRECT_FN_PARAMS_ONLY) WI_NOEXCEPT
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{
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__R_FN_LOCALS;
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return wil::details::ReportStatus_CaughtException<FailureType::Return>(__R_DIRECT_FN_CALL_ONLY);
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}
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__R_DIRECT_METHOD(NTSTATUS, Nt_Return_CaughtExceptionMsg)(__R_DIRECT_FN_PARAMS _Printf_format_string_ PCSTR formatString, ...) WI_NOEXCEPT
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{
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va_list argList;
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va_start(argList, formatString);
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__R_FN_LOCALS;
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return wil::details::ReportStatus_CaughtExceptionMsg<FailureType::Return>(__R_DIRECT_FN_CALL formatString, argList);
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}
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#endif
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}
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template<FailureType T>
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__declspec(noinline) inline NTSTATUS ReportStatus_CaughtException(__R_FN_PARAMS_FULL, SupportedExceptions supported)
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{
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wchar_t message[2048];
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message[0] = L'\0';
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return ReportFailure_CaughtExceptionCommon<T>(__R_FN_CALL_FULL, message, ARRAYSIZE(message), supported).status;
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}
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template<>
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__declspec(noinline) inline NTSTATUS ReportStatus_CaughtException<FailureType::FailFast>(__R_FN_PARAMS_FULL, SupportedExceptions supported)
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{
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wchar_t message[2048];
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message[0] = L'\0';
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RESULT_NORETURN_RESULT(ReportFailure_CaughtExceptionCommon<FailureType::FailFast>(__R_FN_CALL_FULL, message, ARRAYSIZE(message), supported).status);
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}
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template<>
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__declspec(noinline) inline NTSTATUS ReportStatus_CaughtException<FailureType::Exception>(__R_FN_PARAMS_FULL, SupportedExceptions supported)
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{
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wchar_t message[2048];
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message[0] = L'\0';
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RESULT_NORETURN_RESULT(ReportFailure_CaughtExceptionCommon<FailureType::Exception>(__R_FN_CALL_FULL, message, ARRAYSIZE(message), supported).status);
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}
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template<FailureType T>
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__declspec(noinline) inline NTSTATUS ReportStatus_CaughtExceptionMsg(__R_FN_PARAMS_FULL, _Printf_format_string_ PCSTR formatString, va_list argList)
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{
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// Pre-populate the buffer with our message, the exception message will be added to it...
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wchar_t message[2048];
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PrintLoggingMessage(message, ARRAYSIZE(message), formatString, argList);
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StringCchCatW(message, ARRAYSIZE(message), L" -- ");
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return ReportFailure_CaughtExceptionCommon<T>(__R_FN_CALL_FULL, message, ARRAYSIZE(message), SupportedExceptions::Default).status;
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}
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template<>
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__declspec(noinline) inline NTSTATUS ReportStatus_CaughtExceptionMsg<FailureType::FailFast>(__R_FN_PARAMS_FULL, _Printf_format_string_ PCSTR formatString, va_list argList)
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{
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// Pre-populate the buffer with our message, the exception message will be added to it...
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wchar_t message[2048];
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PrintLoggingMessage(message, ARRAYSIZE(message), formatString, argList);
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StringCchCatW(message, ARRAYSIZE(message), L" -- ");
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RESULT_NORETURN_RESULT(ReportFailure_CaughtExceptionCommon<FailureType::FailFast>(__R_FN_CALL_FULL, message, ARRAYSIZE(message), SupportedExceptions::Default).status);
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}
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template<>
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__declspec(noinline) inline NTSTATUS ReportStatus_CaughtExceptionMsg<FailureType::Exception>(__R_FN_PARAMS_FULL, _Printf_format_string_ PCSTR formatString, va_list argList)
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{
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// Pre-populate the buffer with our message, the exception message will be added to it...
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wchar_t message[2048];
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PrintLoggingMessage(message, ARRAYSIZE(message), formatString, argList);
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StringCchCatW(message, ARRAYSIZE(message), L" -- ");
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RESULT_NORETURN_RESULT(ReportFailure_CaughtExceptionCommon<FailureType::Exception>(__R_FN_CALL_FULL, message, ARRAYSIZE(message), SupportedExceptions::Default).status);
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}
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}
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}
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#endif // __WIL_NT_RESULTMACROS_INCLUDED
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