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
31 $Id: signal.c 5900 2006-11-04 17:30:44Z michi $
43 #if defined(ENABLE_THREADS)
44 # include "threads/native/threads.h"
47 #include "vm/signallocal.h"
48 #include "vm/options.h"
50 #include "vm/jit/stacktrace.h"
53 /* function prototypes ********************************************************/
55 void signal_handler_sighup(int sig, siginfo_t *siginfo, void *_p);
56 void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p);
57 void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p);
60 /* signal_init *****************************************************************
62 Initializes the signal subsystem and installs the signal handler.
64 *******************************************************************************/
66 void signal_init(void)
68 #if !defined(__CYGWIN__)
71 /* Allocate something so the garbage collector's signal handlers
74 #if defined(ENABLE_GC_BOEHM)
78 /* install signal handlers we need to convert to exceptions */
80 sigemptyset(&act.sa_mask);
82 #if defined(ENABLE_JIT)
83 # if defined(ENABLE_INTRP)
86 /* catch NullPointerException/StackOverFlowException */
89 act.sa_sigaction = md_signal_handler_sigsegv;
90 act.sa_flags = SA_NODEFER | SA_SIGINFO;
93 sigaction(SIGSEGV, &act, NULL);
97 sigaction(SIGBUS, &act, NULL);
101 /* catch ArithmeticException */
103 #if defined(__I386__) || defined(__X86_64__)
104 act.sa_sigaction = md_signal_handler_sigfpe;
105 act.sa_flags = SA_NODEFER | SA_SIGINFO;
106 sigaction(SIGFPE, &act, NULL);
108 # if defined(ENABLE_INTRP)
111 #endif /* !defined(ENABLE_INTRP) */
113 #if defined(ENABLE_THREADS)
114 /* catch SIGHUP for threads_thread_interrupt */
116 act.sa_sigaction = signal_handler_sighup;
118 sigaction(SIGHUP, &act, NULL);
121 /* catch SIGINT for exiting properly on <ctrl>-c */
123 act.sa_sigaction = signal_handler_sigint;
124 act.sa_flags = SA_NODEFER | SA_SIGINFO;
125 sigaction(SIGINT, &act, NULL);
127 #if defined(ENABLE_THREADS)
128 /* catch SIGQUIT for thread dump */
130 # if !defined(__FREEBSD__)
131 act.sa_sigaction = signal_handler_sigquit;
132 act.sa_flags = SA_SIGINFO;
133 sigaction(SIGQUIT, &act, NULL);
137 #if defined(ENABLE_THREADS) && defined(ENABLE_PROFILING)
138 /* install signal handler for profiling sampling */
140 act.sa_sigaction = md_signal_handler_sigusr2;
141 act.sa_flags = SA_SIGINFO;
142 sigaction(SIGUSR2, &act, NULL);
145 #endif /* !defined(__CYGWIN__) */
149 /* signal_handler_sighup *******************************************************
151 This handler is required by threads_thread_interrupt and does
154 *******************************************************************************/
156 #if defined(ENABLE_THREADS)
157 void signal_handler_sighup(int sig, siginfo_t *siginfo, void *_p)
164 /* signal_handler_sigquit ******************************************************
166 Handle for SIGQUIT (<ctrl>-\) which print a stacktrace for every
169 *******************************************************************************/
171 #if defined(ENABLE_THREADS)
172 void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p)
181 /* signal_handler_sigint *******************************************************
183 Handler for SIGINT (<ctrl>-c) which shuts down CACAO properly with
186 *******************************************************************************/
188 void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p)
190 /* if we are already in Runtime.exit(), just do it hardcore */
193 fprintf(stderr, "Caught SIGINT while already shutting down. Shutdown aborted...\n");
197 /* exit the vm properly */
204 * These are local overrides for various environment variables in Emacs.
205 * Please do not remove this and leave it at the end of the file, where
206 * Emacs will automagically detect them.
207 * ---------------------------------------------------------------------
210 * indent-tabs-mode: t