1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <time.h>
#include <errno.h>
#include "intertask_interface.h"
#include "timer.h"
#include "backtrace.h"
#include "assertions.h"
#include "signals.h"
#include "log.h"
#if defined (LOG_D) && defined (LOG_E)
# define SIG_DEBUG(x, args...) LOG_D(RRC, x, ##args)
# define SIG_ERROR(x, args...) LOG_E(RRC, x, ##args)
#endif
#ifndef SIG_DEBUG
# define SIG_DEBUG(x, args...) do { fprintf(stdout, "[SIG][D]"x, ##args); } while(0)
#endif
#ifndef SIG_ERROR
# define SIG_ERROR(x, args...) do { fprintf(stdout, "[SIG][E]"x, ##args); } while(0)
#endif
static sigset_t set;
int signal_mask(void)
{
/* We set the signal mask to avoid threads other than the main thread
* to receive the timer signal. Note that threads created will inherit this
* configuration.
*/
sigemptyset(&set);
sigaddset (&set, SIGTIMER);
sigaddset (&set, SIGUSR1);
sigaddset (&set, SIGABRT);
sigaddset (&set, SIGSEGV);
sigaddset (&set, SIGINT);
if (sigprocmask(SIG_BLOCK, &set, NULL) < 0) {
perror ("sigprocmask");
return -1;
}
return 0;
}
int signal_handle(int *end)
{
int ret;
siginfo_t info;
sigemptyset(&set);
sigaddset (&set, SIGTIMER);
sigaddset (&set, SIGUSR1);
sigaddset (&set, SIGABRT);
sigaddset (&set, SIGSEGV);
sigaddset (&set, SIGINT);
if (sigprocmask(SIG_BLOCK, &set, NULL) < 0) {
perror ("sigprocmask");
return -1;
}
/* Block till a signal is received.
* NOTE: The signals defined by set are required to be blocked at the time
* of the call to sigwait() otherwise sigwait() is not successful.
*/
if ((ret = sigwaitinfo(&set, &info)) == -1) {
perror ("sigwait");
return ret;
}
//printf("Received signal %d\n", info.si_signo);
/* Real-time signals are non constant and are therefore not suitable for
* use in switch.
*/
if (info.si_signo == SIGTIMER) {
timer_handle_signal(&info);
} else {
/* Dispatch the signal to sub-handlers */
switch(info.si_signo) {
case SIGUSR1:
SIG_DEBUG("Received SIGUSR1\n");
*end = 1;
break;
case SIGSEGV: /* Fall through */
case SIGABRT:
SIG_DEBUG("Received SIGABORT\n");
backtrace_handle_signal(&info);
break;
case SIGINT:
printf("Received SIGINT\n");
itti_send_terminate_message(TASK_UNKNOWN);
*end = 1;
break;
default:
SIG_ERROR("Received unknown signal %d\n", info.si_signo);
break;
}
}
return 0;
}