git.m6w6.name Git - awesomized/libmemcached/blob - clients/ms_sigsegv.c

   1 /*
   2  * File:   ms_sigsegv.c
   3  * Author: Mingqiang Zhuang
   4  *
   5  * Created on March 15, 2009
   6  *
   7  * (c) Copyright 2009, Schooner Information Technology, Inc.
   8  * http://www.schoonerinfotech.com/
   9  *
  10  * Rewrite of stack dump:
  11  *  Copyright (C) 2009 Sun Microsystems
  12  *  Author Trond Norbye
  13  */
  14
  15 #include "config.h"
  16
  17 #include <memory.h>
  18 #include <stdlib.h>
  19 #include <stdio.h>
  20 #include <signal.h>
  21 #include <pthread.h>
  22
  23 #include "ms_memslap.h"
  24 #include "ms_setting.h"
  25
  26 /* prototypes */
  27 int ms_setup_sigsegv(void);
  28 int ms_setup_sigpipe(void);
  29 int ms_setup_sigint(void);
  30
  31
  32 /* signal seg reaches, this function will run */
  33 static void ms_signal_segv(int signum, siginfo_t *info, void *ptr)
  34 {
  35   UNUSED_ARGUMENT(signum);
  36   UNUSED_ARGUMENT(info);
  37   UNUSED_ARGUMENT(ptr);
  38
  39   pthread_mutex_lock(&ms_global.quit_mutex);
  40   fprintf(stderr, "Segmentation fault occurred.\nStack trace:\n");
  41   pandora_print_callstack(stderr);
  42   fprintf(stderr, "End of stack trace\n");
  43   pthread_mutex_unlock(&ms_global.quit_mutex);
  44   abort();
  45 }
  46
  47 /* signal int reaches, this function will run */
  48 static void ms_signal_int(int signum, siginfo_t *info, void *ptr)
  49 {
  50   UNUSED_ARGUMENT(signum);
  51   UNUSED_ARGUMENT(info);
  52   UNUSED_ARGUMENT(ptr);
  53
  54   pthread_mutex_lock(&ms_global.quit_mutex);
  55   fprintf(stderr, "SIGINT handled.\n");
  56   pthread_mutex_unlock(&ms_global.quit_mutex);
  57   exit(1);
  58 } /* ms_signal_int */
  59
  60
  61 /**
  62  * redirect signal seg
  63  *
  64  * @return if success, return 0, else return -1
  65  */
  66 int ms_setup_sigsegv(void)
  67 {
  68   struct sigaction action;
  69
  70   memset(&action, 0, sizeof(action));
  71   action.sa_sigaction= ms_signal_segv;
  72   action.sa_flags= SA_SIGINFO;
  73   if (sigaction(SIGSEGV, &action, NULL) < 0)
  74   {
  75     perror("sigaction");
  76     return 0;
  77   }
  78
  79   return -1;
  80 } /* ms_setup_sigsegv */
  81
  82
  83 /**
  84  * redirect signal pipe
  85  *
  86  * @return if success, return 0, else return -1
  87  */
  88 int ms_setup_sigpipe(void)
  89 {
  90   /* ignore the SIGPIPE signal */
  91   signal(SIGPIPE, SIG_IGN);
  92
  93   return -1;
  94 } /* ms_setup_sigpipe */
  95
  96
  97 /**
  98  * redirect signal int
  99  *
 100  * @return if success, return 0, else return -1
 101  */
 102 int ms_setup_sigint(void)
 103 {
 104   struct sigaction action_3;
 105
 106   memset(&action_3, 0, sizeof(action_3));
 107   action_3.sa_sigaction= ms_signal_int;
 108   action_3.sa_flags= SA_SIGINFO;
 109   if (sigaction(SIGINT, &action_3, NULL) < 0)
 110   {
 111     perror("sigaction");
 112     return 0;
 113   }
 114
 115   return -1;
 116 } /* ms_setup_sigint */
 117
 118
 119 #ifndef SIGSEGV_NO_AUTO_INIT
 120 static void __attribute((constructor)) ms_init(void)
 121 {
 122   ms_setup_sigsegv();
 123   ms_setup_sigpipe();
 124   ms_setup_sigint();
 125 }
 126 #endif