1 /* src/vm/signal.c - machine independent signal functions
3 Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
4 R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
5 C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
6 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., 59 Temple Place - Suite 330, Boston, MA
25 Contact: cacao@complang.tuwien.ac.at
27 Authors: Christian Thalinger
31 $Id: signal.c 3729 2005-11-22 11:38:12Z twisti $
41 #include "cacao/cacao.h"
43 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
44 # include "threads/native/threads.h"
47 #include "vm/options.h"
48 #include "vm/jit/stacktrace.h"
51 /* function prototypes ********************************************************/
53 void signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p);
54 void signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p);
55 void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p);
56 void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p);
57 void signal_handler_sigusr1(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)
70 /* install signal handlers we need to convert to exceptions */
72 sigemptyset(&act.sa_mask);
75 #if defined(ENABLE_JIT)
76 # if defined(ENABLE_INTRP)
79 /* catch NullPointerException/StackOverFlowException */
82 act.sa_sigaction = signal_handler_sigsegv;
83 act.sa_flags = SA_NODEFER | SA_SIGINFO;
86 sigaction(SIGSEGV, &act, NULL);
90 sigaction(SIGBUS, &act, NULL);
95 /* catch ArithmeticException */
97 #if defined(__I386__) || defined(__X86_64__)
98 act.sa_sigaction = signal_handler_sigfpe;
99 act.sa_flags = SA_NODEFER | SA_SIGINFO;
100 sigaction(SIGFPE, &act, NULL);
102 # if defined(ENABLE_INTRP)
105 #endif /* !defined(ENABLE_INTRP) */
108 /* catch SIGINT for exiting properly on <ctrl>-c */
110 act.sa_sigaction = signal_handler_sigint;
111 act.sa_flags = SA_NODEFER | SA_SIGINFO;
112 sigaction(SIGINT, &act, NULL);
116 /* catch SIGQUIT for thread dump */
118 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
119 #if !defined(__FREEBSD__)
120 act.sa_sigaction = signal_handler_sigquit;
121 act.sa_flags = SA_SIGINFO;
122 sigaction(SIGQUIT, &act, NULL);
124 /* XXX boehm uses SIGUSR1 for suspend on freebsd */
126 act.sa_sigaction = signal_handler_sigusr1;
127 act.sa_flags = SA_SIGINFO;
128 sigaction(SIGUSR1, &act, NULL);
134 /* signal_handler_sigquit ******************************************************
138 *******************************************************************************/
140 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
141 void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p)
150 /* signal_handler_sigint *******************************************************
152 Handler for SIGINT (<ctrl>-c) which shuts down CACAO properly with
155 *******************************************************************************/
157 void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p)
159 /* if we are already in Runtime.exit(), just do it hardcore */
162 fprintf(stderr, "Catched SIGINT while already shutting down. Shutdown aborted...\n");
166 /* exit the vm properly */
172 /* signal_handler_sigusr1 ******************************************************
176 *******************************************************************************/
178 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
179 void signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p)
181 /* call stacktrace function */
183 stacktrace_dump_trace();
189 * These are local overrides for various environment variables in Emacs.
190 * Please do not remove this and leave it at the end of the file, where
191 * Emacs will automagically detect them.
192 * ---------------------------------------------------------------------
195 * indent-tabs-mode: t