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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2008 Sun Microsystems, Inc.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#include "drizzled/signal_handler.h"
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#include "drizzled/drizzled.h"
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#include "drizzled/session.h"
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#include "drizzled/session/cache.h"
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#include "drizzled/internal/my_sys.h"
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#include "drizzled/probes.h"
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#include "drizzled/plugin.h"
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#include "drizzled/plugin/scheduler.h"
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#include "drizzled/util/backtrace.h"
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using namespace drizzled;
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static uint32_t killed_threads;
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static bool segfaulted= false;
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* We declare these extern "C" because they are passed to system callback functions
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* and Sun Studio does not like it when those don't have C linkage. We prefix them
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* because extern "C"-ing something effectively removes the namespace from the
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* linker symbols, meaning they would be exporting symbols like "print_signal_warning
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void drizzled_print_signal_warning(int sig)
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if (global_system_variables.log_warnings)
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errmsg_printf(error::WARN, _("Got signal %d from thread %"PRIu32),
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sig, global_thread_id);
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#ifndef HAVE_BSD_SIGNALS
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sa.sa_handler= drizzled_print_signal_warning;
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sigaction(sig, &sa, NULL); /* int. thread system calls */
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alarm(2); /* reschedule alarm */
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/** Called when a thread is aborted. */
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void drizzled_end_thread_signal(int )
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Session *session= current_session;
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Session::shared_ptr session_ptr(session::Cache::singleton().find(session->getSessionId()));
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if (not session_ptr) // We need to make we have a lock on session before we do anything with it.
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// We need to get the ID before we kill off the session
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session_ptr->scheduler->killSessionNow(session_ptr);
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DRIZZLE_CONNECTION_DONE(session_ptr->getSessionId());
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static void write_core(int sig)
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For GCOV build, crashing will prevent the writing of code coverage
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information from this process, causing gcov output to be incomplete.
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So we force the writing of coverage information here before terminating.
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extern void __gcov_flush(void);
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pthread_kill(pthread_self(), sig);
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#if defined(P_MYID) && !defined(SCO)
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/* On Solaris, the above kill is not enough */
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sigsend(P_PID,P_MYID,sig);
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void drizzled_handle_segfault(int sig)
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Strictly speaking, one needs a mutex here
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but since we have got SIGSEGV already, things are a mess
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so not having the mutex is not as bad as possibly using a buggy
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mutex - so we keep things simple
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fprintf(stderr, _("Fatal signal %d while backtracing\n"), sig);
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curr_time= time(NULL);
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if(curr_time == (time_t)-1)
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fprintf(stderr, _("Fatal: time() call failed\n"));
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localtime_r(&curr_time, &tm);
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fprintf(stderr,_("%02d%02d%02d %2d:%02d:%02d - drizzled got signal %d;\n"
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"This could be because you hit a bug. It is also possible that "
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"this binary\n or one of the libraries it was linked against is "
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"corrupt, improperly built,\n or misconfigured. This error can "
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"also be caused by malfunctioning hardware.\n"),
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tm.tm_year % 100, tm.tm_mon+1, tm.tm_mday,
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tm.tm_hour, tm.tm_min, tm.tm_sec,
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fprintf(stderr, _("We will try our best to scrape up some info that "
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"will hopefully help diagnose\n"
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"the problem, but since we have already crashed, "
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"something is definitely wrong\nand this may fail.\n\n"));
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fprintf(stderr, "read_buffer_size=%ld\n", (long) global_system_variables.read_buff_size);
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fprintf(stderr, "max_used_connections=%"PRIu64"\n", current_global_counters.max_used_connections);
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fprintf(stderr, "connection_count=%u\n", uint32_t(connection_count));
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fprintf(stderr, _("It is possible that drizzled could use up to \n"
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"(read_buffer_size + sort_buffer_size)*thread_count\n"
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"Hope that's ok; if not, decrease some variables in the "
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drizzled::util::custom_backtrace();