1/*
2 * Copyright 2016-present Facebook, Inc.
3 *
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
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
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.
15 */
16
17#pragma once
18
19#include <exception>
20#include <typeinfo>
21
22namespace folly {
23namespace exception_tracer {
24
25namespace detail {
26/*
27 * Unfortunately due to ambiguous nature of exception specifiers,
28 * standard does not allow them to appear in typedefs or alias-declarations.
29 * We, however, want callbacks to be exception safe.
30 * This dummies are an ugly workaround that problem.
31 */
32void dummyCxaThrow(void*, std::type_info*, void (*)(void*)) noexcept;
33void dummyCxaBeginCatch(void*) noexcept;
34void dummyCxaRethrow() noexcept;
35void dummyCxaEndCatch() noexcept;
36void dummyRethrowException(std::exception_ptr) noexcept;
37} // namespace detail
38
39using CxaThrowType = decltype(&detail::dummyCxaThrow);
40using CxaBeginCatchType = decltype(&detail::dummyCxaBeginCatch);
41using CxaRethrowType = decltype(&detail::dummyCxaRethrow);
42using CxaEndCatchType = decltype(&detail::dummyCxaEndCatch);
43using RethrowExceptionType = decltype(&detail::dummyRethrowException);
44
45void registerCxaThrowCallback(CxaThrowType callback);
46void registerCxaBeginCatchCallback(CxaBeginCatchType callback);
47void registerCxaRethrowCallback(CxaRethrowType callback);
48void registerCxaEndCatchCallback(CxaEndCatchType callback);
49void registerRethrowExceptionCallback(RethrowExceptionType callback);
50} // namespace exception_tracer
51} // namespace folly
52