Line data    Source code

       1             : /*
       2             :  * (C) Copyright 2010 Marek Dopiera
       3             :  * 
       4             :  * This file is part of CoherentDB.
       5             :  * 
       6             :  * CoherentDB is free software: you can redistribute it and/or modify it
       7             :  * under the terms of the GNU General Public License as published by
       8             :  * the Free Software Foundation, either version 3 of the License, or
       9             :  * (at your option) any later version.
      10             :  * 
      11             :  * CoherentDB is distributed in the hope that it will be useful, but
      12             :  * WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
      14             :  * General Public License for more details.
      15             :  * 
      16             :  * You should have received a copy of the GNU General Public
      17             :  * License along with CoherentDB. If not, see
      18             :  * http://www.gnu.org/licenses/.
      19             :  */
      20             : 
      21             : #include <errno.h>
      22             : #include <signal.h>
      23             : 
      24             : #include <exception>
      25             : #include <iostream>
      26             : #include <cstring>
      27             : 
      28             : #include <debug/common.h>
      29             : #include <log/log.h>
      30             : 
      31             : using namespace std;
      32             : 
      33             : namespace coherent {
      34             : namespace debug {
      35             : 
      36             : static int const affected_signals[] = { SIGHUP, SIGILL, SIGINT, SIGQUIT,
      37             :         SIGFPE, SIGSEGV, SIGPIPE, SIGALRM, SIGTERM, SIGUSR1, SIGUSR2, SIGBUS,
      38             :         SIGPROF, SIGSYS, SIGTRAP, SIGVTALRM, SIGXCPU, SIGXFSZ };
      39             : static unsigned const num_signals = sizeof(affected_signals) / sizeof(int);
      40             : 
      41           0 : static void unexpected_hndlr()
      42             : {
      43             :         r_assert(false, "An unexpected excpetion has been thrown.");
      44             : }
      45             : 
      46           0 : static void terminate_hndlr()
      47             : {
      48             :         r_assert(false, "Terminate called.");
      49             : }
      50             : 
      51           0 : static void signal_hndlr(int sig)
      52             : {
      53             :         r_assert(false, "Unexpected signal " << sig << " has been received");
      54             : }
      55             : 
      56           7 : void set_terminate_handler()
      57             : {
      58           7 :         std::set_terminate(terminate_hndlr);
      59           7 :         std::set_unexpected(unexpected_hndlr);
      60           7 :         if (!(&(*log::log_FATAL))) {
      61             :                 cerr <<
      62           0 :                         "Log system should be initialized before setting terminate handlers."
      63           0 :                         << endl;
      64           0 :                 ::abort();
      65             :         }
      66         133 :         for (unsigned i = 0; i < num_signals; ++i) {
      67             :                 struct sigaction sa;
      68         126 :                 memset(&sa, 0, sizeof(struct sigaction));
      69         126 :                 sa.sa_handler = signal_hndlr;
      70         126 :                 sa.sa_flags = SA_RESETHAND | SA_NODEFER;
      71         126 :                 int err = sigaction(affected_signals[i], &sa, NULL);
      72         126 :                 if (err != 0)
      73             :                         LOG(WARN, "Failed to set signal handler for sig="
      74             :                                         <<affected_signals[i] << ", errno=" << errno);
      75             :         }
      76           7 : }
      77             : 
      78             : } // namespace debug
      79          21 : } // namespace coherent