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
|
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
/* General fatal signal handling code for SDL */
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#include "SDL.h"
#include "SDL_fatal.h"
/* This installs some signal handlers for the more common fatal signals,
so that if the programmer is lazy, the app doesn't die so horribly if
the program crashes.
*/
static void SDL_Parachute(int sig)
{
signal(sig, SIG_DFL);
SDL_Quit();
raise(sig);
}
static int SDL_fatal_signals[] = {
SIGSEGV,
#ifdef SIGBUS
SIGBUS,
#endif
#ifdef SIGFPE
SIGFPE,
#endif
#ifdef SIGQUIT
SIGQUIT,
#endif
0
};
void SDL_InstallParachute(void)
{
/* Set a handler for any fatal signal not already handled */
int i;
#ifdef HAVE_SIGACTION
struct sigaction action;
for ( i=0; SDL_fatal_signals[i]; ++i ) {
sigaction(SDL_fatal_signals[i], NULL, &action);
if ( action.sa_handler == SIG_DFL ) {
action.sa_handler = SDL_Parachute;
sigaction(SDL_fatal_signals[i], &action, NULL);
}
}
#ifdef SIGALRM
/* Set SIGALRM to be ignored -- necessary on Solaris */
sigaction(SIGALRM, NULL, &action);
if ( action.sa_handler == SIG_DFL ) {
action.sa_handler = SIG_IGN;
sigaction(SIGALRM, &action, NULL);
}
#endif
#else
void (*ohandler)(int);
for ( i=0; SDL_fatal_signals[i]; ++i ) {
ohandler = signal(SDL_fatal_signals[i], SDL_Parachute);
if ( ohandler != SIG_DFL ) {
signal(SDL_fatal_signals[i], ohandler);
}
}
#endif /* HAVE_SIGACTION */
return;
}
void SDL_UninstallParachute(void)
{
/* Remove a handler for any fatal signal handled */
int i;
#ifdef HAVE_SIGACTION
struct sigaction action;
for ( i=0; SDL_fatal_signals[i]; ++i ) {
sigaction(SDL_fatal_signals[i], NULL, &action);
if ( action.sa_handler == SDL_Parachute ) {
action.sa_handler = SIG_DFL;
sigaction(SDL_fatal_signals[i], &action, NULL);
}
}
#else
void (*ohandler)(int);
for ( i=0; SDL_fatal_signals[i]; ++i ) {
ohandler = signal(SDL_fatal_signals[i], SIG_DFL);
if ( ohandler != SDL_Parachute ) {
signal(SDL_fatal_signals[i], ohandler);
}
}
#endif /* HAVE_SIGACTION */
}
#else
/* No signals on this platform, nothing to do.. */
void SDL_InstallParachute(void)
{
return;
}
void SDL_UninstallParachute(void)
{
return;
}
#endif /* HAVE_SIGNAL_H */
|
