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// Copyright 2019 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef DAWNNATIVE_ERRORINJECTOR_H_
#define DAWNNATIVE_ERRORINJECTOR_H_
#include <stdint.h>
#include <type_traits>
namespace dawn_native {
template <typename ErrorType>
struct InjectedErrorResult {
ErrorType error;
bool injected;
};
bool ErrorInjectorEnabled();
bool ShouldInjectError();
template <typename ErrorType>
InjectedErrorResult<ErrorType> MaybeInjectError(ErrorType errorType) {
return InjectedErrorResult<ErrorType>{errorType, ShouldInjectError()};
}
template <typename ErrorType, typename... ErrorTypes>
InjectedErrorResult<ErrorType> MaybeInjectError(ErrorType errorType, ErrorTypes... errorTypes) {
if (ShouldInjectError()) {
return InjectedErrorResult<ErrorType>{errorType, true};
}
return MaybeInjectError(errorTypes...);
}
} // namespace dawn_native
#if defined(DAWN_ENABLE_ERROR_INJECTION)
# define INJECT_ERROR_OR_RUN(stmt, ...) \
[&]() { \
if (DAWN_UNLIKELY(::dawn_native::ErrorInjectorEnabled())) { \
/* Only used for testing and fuzzing, so it's okay if this is deoptimized */ \
auto injectedError = ::dawn_native::MaybeInjectError(__VA_ARGS__); \
if (injectedError.injected) { \
return injectedError.error; \
} \
} \
return (stmt); \
}()
#else
# define INJECT_ERROR_OR_RUN(stmt, ...) stmt
#endif
#endif // DAWNNATIVE_ERRORINJECTOR_H_