1 /* 2 * Copyright (C) 2011 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 #include "runtime.h" 18 19 #include <signal.h> 20 21 #include <iostream> 22 23 #include "runtime_common.h" 24 25 namespace art { 26 27 void HandleUnexpectedSignalLinux(int signal_number, siginfo_t* info, void* raw_context) { 28 HandleUnexpectedSignalCommon(signal_number, info, raw_context, /* running_on_linux */ true); 29 30 if (getenv("debug_db_uid") != nullptr || getenv("art_wait_for_gdb_on_crash") != nullptr) { 31 pid_t tid = GetTid(); 32 std::string thread_name(GetThreadName(tid)); 33 std::cerr << "********************************************************\n" 34 << "* Process " << getpid() << " thread " << tid << " \"" << thread_name 35 << "\"" 36 << " has been suspended while crashing.\n" 37 << "* Attach gdb:\n" 38 << "* gdb -p " << tid << "\n" 39 << "********************************************************" 40 << std::endl; 41 // Wait for debugger to attach. 42 while (true) { 43 } 44 } 45 #ifdef __linux__ 46 // Remove our signal handler for this signal... 47 struct sigaction action; 48 memset(&action, 0, sizeof(action)); 49 sigemptyset(&action.sa_mask); 50 action.sa_handler = SIG_DFL; 51 sigaction(signal_number, &action, nullptr); 52 // ...and re-raise so we die with the appropriate status. 53 kill(getpid(), signal_number); 54 #else 55 exit(EXIT_FAILURE); 56 #endif 57 } 58 59 void Runtime::InitPlatformSignalHandlers() { 60 // On the host, we don't have debuggerd to dump a stack for us when something unexpected happens. 61 InitPlatformSignalHandlersCommon(HandleUnexpectedSignalLinux, 62 nullptr, 63 /* handle_timeout_signal */ true); 64 } 65 66 } // namespace art 67
