1 | /* |
2 | * Copyright 2013-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 <functional> |
20 | |
21 | namespace folly { |
22 | namespace symbolizer { |
23 | |
24 | /** |
25 | * Install handler for fatal signals. The list of signals being handled is in |
26 | * SignalHandler.cpp. |
27 | * |
28 | * The handler will dump signal and time information followed by a stack trace |
29 | * to stderr, and then call the callbacks registered below. |
30 | */ |
31 | void installFatalSignalHandler(); |
32 | |
33 | /** |
34 | * Add a callback to be run when receiving a fatal signal. They will also |
35 | * be called by LOG(FATAL) and abort() (as those raise SIGABRT internally). |
36 | * |
37 | * These callbacks must be async-signal-safe, so don't even think of using |
38 | * LOG(...) or printf or malloc / new or doing anything even remotely fun. |
39 | * |
40 | * All these fatal callback must be added before calling |
41 | * installFatalSignalCallbacks(), below. |
42 | */ |
43 | typedef void (*SignalCallback)(); |
44 | void addFatalSignalCallback(SignalCallback callback); |
45 | |
46 | /** |
47 | * Install the fatal signal callbacks; fatal signals will call these |
48 | * callbacks in the order in which they were added. |
49 | */ |
50 | void installFatalSignalCallbacks(); |
51 | } // namespace symbolizer |
52 | } // namespace folly |
53 | |