1 /* 2 * Copyright (C) 2014 The Android Open Source Project 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 #ifndef ART_SIGCHAINLIB_SIGCHAIN_H_ 18 #define ART_SIGCHAINLIB_SIGCHAIN_H_ 19 20 // TODO(b/142944043): Symbol changes here currently need to be reflected in 21 // version scripts in frameworks/base/cmds/app_process. The plan is to convert 22 // libsigchain to a shared lib to get rid of them. 23 24 #include <signal.h> 25 #include <stdint.h> 26 27 namespace art { 28 29 // Handlers that exit without returning to their caller (e.g. via siglongjmp) must pass this flag. 30 static constexpr uint64_t SIGCHAIN_ALLOW_NORETURN = 0x1UL; 31 32 struct SigchainAction { 33 bool (*sc_sigaction)(int, siginfo_t*, void*); 34 sigset_t sc_mask; 35 uint64_t sc_flags; 36 }; 37 38 extern "C" void AddSpecialSignalHandlerFn(int signal, SigchainAction* sa); 39 extern "C" void RemoveSpecialSignalHandlerFn(int signal, bool (*fn)(int, siginfo_t*, void*)); 40 41 extern "C" void EnsureFrontOfChain(int signal); 42 extern "C" void SkipAddSignalHandler(bool value); 43 44 } // namespace art 45 46 #endif // ART_SIGCHAINLIB_SIGCHAIN_H_ 47