2 * Copyright 2016 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef FOLLY_EXPERIMENTAL_EXCEPTION_TRACER_EXCEPTIONTRACERLIB_H_
18 #define FOLLY_EXPERIMENTAL_EXCEPTION_TRACER_EXCEPTIONTRACERLIB_H_
24 namespace exception_tracer {
28 * Unfortunately due to ambiguous nature of exception specifiers,
29 * standard does not allow them to appear in typedefs or alias-declarations.
30 * We, however, want callbacks to be exception safe.
31 * This dummies are an ugly workaround that problem.
33 void dummyCxaThrow(void*, std::type_info*, void (*)(void*)) noexcept;
34 void dummyCxaBeginCatch(void*) noexcept;
35 void dummyCxaRethrow(void) noexcept;
36 void dummyCxaEndCatch(void) noexcept;
37 void dummyRethrowException(std::exception_ptr) noexcept;
40 using CxaThrowType = decltype(&detail::dummyCxaThrow);
41 using CxaBeginCatchType = decltype(&detail::dummyCxaBeginCatch);
42 using CxaRethrowType = decltype(&detail::dummyCxaRethrow);
43 using CxaEndCatchType = decltype(&detail::dummyCxaEndCatch);
44 using RethrowExceptionType = decltype(&detail::dummyRethrowException);
46 void registerCxaThrowCallback(CxaThrowType callback);
47 void registerCxaBeginCatchCallback(CxaBeginCatchType callback);
48 void registerCxaRethrowCallback(CxaRethrowType callback);
49 void registerCxaEndCatchCallback(CxaEndCatchType callback);
50 void registerRethrowExceptionCallback(RethrowExceptionType callback);
54 #endif /* FOLLY_EXPERIMENTAL_EXCEPTION_TRACER_EXCEPTIONTRACERLIB_H_ */