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SignalHandler.h
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SignalHandler.h
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/*
* Copyright 2014 Facebook, Inc.
*
* 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 FOLLY_SYMBOLIZER_SIGNALHANDLER_H_
#define FOLLY_SYMBOLIZER_SIGNALHANDLER_H_
#include <functional>
namespace folly { namespace symbolizer {
/**
* Install handler for fatal signals. The list of signals being handled is in
* SignalHandler.cpp.
*
* The handler will dump signal and time information followed by a stack trace
* to stderr, and then call the callbacks registered below.
*/
void installFatalSignalHandler();
/**
* Add a callback to be run when receiving a fatal signal. They will also
* be called by LOG(FATAL) and abort() (as those raise SIGABRT internally).
*
* These callbacks must be async-signal-safe, so don't even think of using
* LOG(...) or printf or malloc / new or doing anything even remotely fun.
*
* All these fatal callback must be added before calling
* installFatalSignalCallbacks(), below.
*/
typedef void (*SignalCallback)(void);
void addFatalSignalCallback(SignalCallback callback);
/**
* Install the fatal signal callbacks; fatal signals will call these
* callbacks in the order in which they were added.
*/
void installFatalSignalCallbacks();
}} // namespaces
#endif /* FOLLY_SYMBOLIZER_SIGNALHANDLER_H_ */