1 // Copyright 2019 The Dawn Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef DAWNNATIVE_ERRORINJECTOR_H_ 16 #define DAWNNATIVE_ERRORINJECTOR_H_ 17 18 #include <stdint.h> 19 #include <type_traits> 20 21 namespace dawn_native { 22 23 template <typename ErrorType> 24 struct InjectedErrorResult { 25 ErrorType error; 26 bool injected; 27 }; 28 29 bool ErrorInjectorEnabled(); 30 31 bool ShouldInjectError(); 32 33 template <typename ErrorType> MaybeInjectError(ErrorType errorType)34 InjectedErrorResult<ErrorType> MaybeInjectError(ErrorType errorType) { 35 return InjectedErrorResult<ErrorType>{errorType, ShouldInjectError()}; 36 } 37 38 template <typename ErrorType, typename... ErrorTypes> MaybeInjectError(ErrorType errorType,ErrorTypes...errorTypes)39 InjectedErrorResult<ErrorType> MaybeInjectError(ErrorType errorType, ErrorTypes... errorTypes) { 40 if (ShouldInjectError()) { 41 return InjectedErrorResult<ErrorType>{errorType, true}; 42 } 43 return MaybeInjectError(errorTypes...); 44 } 45 46 } // namespace dawn_native 47 48 #if defined(DAWN_ENABLE_ERROR_INJECTION) 49 50 # define INJECT_ERROR_OR_RUN(stmt, ...) \ 51 [&]() { \ 52 if (DAWN_UNLIKELY(::dawn_native::ErrorInjectorEnabled())) { \ 53 /* Only used for testing and fuzzing, so it's okay if this is deoptimized */ \ 54 auto injectedError = ::dawn_native::MaybeInjectError(__VA_ARGS__); \ 55 if (injectedError.injected) { \ 56 return injectedError.error; \ 57 } \ 58 } \ 59 return (stmt); \ 60 }() 61 62 #else 63 64 # define INJECT_ERROR_OR_RUN(stmt, ...) stmt 65 66 #endif 67 68 #endif // DAWNNATIVE_ERRORINJECTOR_H_ 69