66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <bitset>
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namespace folly {
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namespace symbolizer {
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extern const unsigned long kAllFatalSignals;
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/**
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* Install handler for fatal signals. The list of signals being handled is in
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* SignalHandler.cpp.
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*
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* The handler will dump signal and time information followed by a stack trace
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* to stderr, and then call the callbacks registered below.
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*
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* The signals parameter can be used to specify only specific fatal signals for
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* which the handler should be installed. Only signals from kAllFatalSignals
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* are honored in this list, other signals are ignored.
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*/
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void installFatalSignalHandler(
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std::bitset<64> signals = std::bitset<64>(kAllFatalSignals));
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/**
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* Add a callback to be run when receiving a fatal signal. They will also
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* be called by LOG(FATAL) and abort() (as those raise SIGABRT internally).
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*
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* These callbacks must be async-signal-safe, so don't even think of using
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* LOG(...) or printf or malloc / new or doing anything even remotely fun.
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*
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* All these fatal callback must be added before calling
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* installFatalSignalCallbacks(), below.
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*/
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typedef void (*SignalCallback)();
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void addFatalSignalCallback(SignalCallback cb);
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/**
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* Install the fatal signal callbacks; fatal signals will call these
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* callbacks in the order in which they were added.
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*/
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void installFatalSignalCallbacks();
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/**
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* True if a fatal signal was received (i.e. the process is crashing).
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*/
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bool fatalSignalReceived();
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} // namespace symbolizer
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} // namespace folly
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