1
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
4
* Copyright (C) 2008 Sun Microsystems, Inc.
6
* This program is free software; you can redistribute it and/or modify
7
* it under the terms of the GNU General Public License as published by
8
* the Free Software Foundation; version 2 of the License.
10
* This program is distributed in the hope that it will be useful,
11
* but WITHOUT ANY WARRANTY; without even the implied warranty of
12
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
* GNU General Public License for more details.
15
* You should have received a copy of the GNU General Public License
16
* along with this program; if not, write to the Free Software
17
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24
#include <drizzled/signal_handler.h>
25
#include <drizzled/drizzled.h>
26
#include <drizzled/session.h>
27
#include <drizzled/session/cache.h>
28
#include <drizzled/internal/my_sys.h>
29
#include <drizzled/probes.h>
30
#include <drizzled/plugin.h>
31
#include <drizzled/plugin/scheduler.h>
32
#include <drizzled/current_session.h>
33
#include <drizzled/util/backtrace.h>
34
#include <drizzled/statistics_variables.h>
35
#include <drizzled/system_variables.h>
37
using namespace drizzled;
39
static uint32_t killed_threads;
40
static bool segfaulted= false;
43
* We declare these extern "C" because they are passed to system callback functions
44
* and Sun Studio does not like it when those don't have C linkage. We prefix them
45
* because extern "C"-ing something effectively removes the namespace from the
46
* linker symbols, meaning they would be exporting symbols like "print_signal_warning
51
void drizzled_print_signal_warning(int sig)
53
if (global_system_variables.log_warnings)
54
errmsg_printf(error::WARN, _("Got signal %d from thread %"PRIu32),
55
sig, global_thread_id);
56
#ifndef HAVE_BSD_SIGNALS
61
sa.sa_handler= drizzled_print_signal_warning;
64
sigaction(sig, &sa, NULL); /* int. thread system calls */
67
alarm(2); /* reschedule alarm */
70
/** Called when a thread is aborted. */
71
void drizzled_end_thread_signal(int )
73
Session *session= current_session;
76
Session::shared_ptr session_ptr(session::Cache::find(session->getSessionId()));
77
if (not session_ptr) // We need to make we have a lock on session before we do anything with it.
82
// We need to get the ID before we kill off the session
83
session_ptr->scheduler->killSessionNow(session_ptr);
84
DRIZZLE_CONNECTION_DONE(session_ptr->getSessionId());
88
static void write_core(int sig)
93
For GCOV build, crashing will prevent the writing of code coverage
94
information from this process, causing gcov output to be incomplete.
95
So we force the writing of coverage information here before terminating.
97
extern void __gcov_flush(void);
100
pthread_kill(pthread_self(), sig);
101
#if defined(P_MYID) && !defined(SCO)
102
/* On Solaris, the above kill is not enough */
103
sigsend(P_PID,P_MYID,sig);
107
void drizzled_handle_segfault(int sig)
113
Strictly speaking, one needs a mutex here
114
but since we have got SIGSEGV already, things are a mess
115
so not having the mutex is not as bad as possibly using a buggy
116
mutex - so we keep things simple
120
fprintf(stderr, _("Fatal signal %d while backtracing\n"), sig);
126
curr_time= time(NULL);
127
if(curr_time == (time_t)-1)
129
fprintf(stderr, _("Fatal: time() call failed\n"));
133
localtime_r(&curr_time, &tm);
135
fprintf(stderr,_("%02d%02d%02d %2d:%02d:%02d - drizzled got signal %d;\n"
136
"This could be because you hit a bug. It is also possible that "
137
"this binary\n or one of the libraries it was linked against is "
138
"corrupt, improperly built,\n or misconfigured. This error can "
139
"also be caused by malfunctioning hardware.\n"),
140
tm.tm_year % 100, tm.tm_mon+1, tm.tm_mday,
141
tm.tm_hour, tm.tm_min, tm.tm_sec,
143
fprintf(stderr, _("We will try our best to scrape up some info that "
144
"will hopefully help diagnose\n"
145
"the problem, but since we have already crashed, "
146
"something is definitely wrong\nand this may fail.\n\n"));
147
fprintf(stderr, "read_buffer_size=%ld\n", (long) global_system_variables.read_buff_size);
148
fprintf(stderr, "max_used_connections=%"PRIu64"\n", current_global_counters.max_used_connections);
149
fprintf(stderr, "connection_count=%u\n", uint32_t(connection_count));
150
fprintf(stderr, _("It is possible that drizzled could use up to \n"
151
"(read_buffer_size + sort_buffer_size)*thread_count\n"
153
"Hope that's ok; if not, decrease some variables in the "