1 /* src/vm/signal.c - machine independent signal functions
3 Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
4 C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
5 E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
6 J. Wenninger, Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 Contact: cacao@cacaojvm.org
27 Authors: Christian Thalinger
29 $Id: signal.c 6172 2006-12-11 19:43:41Z twisti $
41 #if defined(ENABLE_THREADS)
42 # include "threads/native/threads.h"
45 #include "mm/memory.h"
46 #include "vm/signallocal.h"
47 #include "vm/options.h"
49 #include "vm/jit/stacktrace.h"
52 /* function prototypes ********************************************************/
54 void signal_handler_sighup(int sig, siginfo_t *siginfo, void *_p);
55 void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p);
56 void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p);
59 /* signal_init *****************************************************************
61 Initializes the signal subsystem and installs the signal handler.
63 *******************************************************************************/
65 void signal_init(void)
67 #if !defined(__CYGWIN__)
70 /* Allocate something so the garbage collector's signal handlers
73 #if defined(ENABLE_GC_BOEHM)
77 /* install signal handlers we need to convert to exceptions */
79 sigemptyset(&act.sa_mask);
81 #if defined(ENABLE_JIT)
82 # if defined(ENABLE_INTRP)
85 /* catch NullPointerException/StackOverFlowException */
87 act.sa_sigaction = md_signal_handler_sigsegv;
88 act.sa_flags = SA_NODEFER | SA_SIGINFO;
91 sigaction(SIGSEGV, &act, NULL);
95 sigaction(SIGBUS, &act, NULL);
98 /* catch ArithmeticException */
100 #if SUPPORT_HARDWARE_DIVIDE_BY_ZERO
101 act.sa_sigaction = md_signal_handler_sigfpe;
102 act.sa_flags = SA_NODEFER | SA_SIGINFO;
103 sigaction(SIGFPE, &act, NULL);
105 # if defined(ENABLE_INTRP)
108 #endif /* !defined(ENABLE_INTRP) */
110 #if defined(ENABLE_THREADS)
111 /* catch SIGHUP for threads_thread_interrupt */
113 act.sa_sigaction = signal_handler_sighup;
115 sigaction(SIGHUP, &act, NULL);
118 /* catch SIGINT for exiting properly on <ctrl>-c */
120 act.sa_sigaction = signal_handler_sigint;
121 act.sa_flags = SA_NODEFER | SA_SIGINFO;
122 sigaction(SIGINT, &act, NULL);
124 #if defined(ENABLE_THREADS)
125 /* catch SIGQUIT for thread dump */
127 # if !defined(__FREEBSD__)
128 act.sa_sigaction = signal_handler_sigquit;
129 act.sa_flags = SA_SIGINFO;
130 sigaction(SIGQUIT, &act, NULL);
134 #if defined(ENABLE_THREADS) && defined(ENABLE_PROFILING)
135 /* install signal handler for profiling sampling */
137 act.sa_sigaction = md_signal_handler_sigusr2;
138 act.sa_flags = SA_SIGINFO;
139 sigaction(SIGUSR2, &act, NULL);
142 #endif /* !defined(__CYGWIN__) */
146 /* signal_handler_sighup *******************************************************
148 This handler is required by threads_thread_interrupt and does
151 *******************************************************************************/
153 #if defined(ENABLE_THREADS)
154 void signal_handler_sighup(int sig, siginfo_t *siginfo, void *_p)
161 /* signal_handler_sigquit ******************************************************
163 Handle for SIGQUIT (<ctrl>-\) which print a stacktrace for every
166 *******************************************************************************/
168 #if defined(ENABLE_THREADS)
169 void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p)
178 /* signal_handler_sigint *******************************************************
180 Handler for SIGINT (<ctrl>-c) which shuts down CACAO properly with
183 *******************************************************************************/
185 void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p)
187 /* if we are already in Runtime.exit(), just do it hardcore */
190 fprintf(stderr, "Caught SIGINT while already shutting down. Shutdown aborted...\n");
194 /* exit the vm properly */
201 * These are local overrides for various environment variables in Emacs.
202 * Please do not remove this and leave it at the end of the file, where
203 * Emacs will automagically detect them.
204 * ---------------------------------------------------------------------
207 * indent-tabs-mode: t