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 3290 2005-09-27 23:03:15Z twisti $
40 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
41 # include "threads/native/threads.h"
44 #include "vm/options.h"
45 #include "vm/jit/stacktrace.h"
48 /* function prototypes ********************************************************/
50 void signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p);
51 void signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p);
52 void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p);
53 void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p);
54 void signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p);
57 /* signal_init *****************************************************************
59 Initializes the signal subsystem and installs the signal handler.
61 *******************************************************************************/
63 void signal_init(void)
67 /* install signal handlers we need to convert to exceptions */
69 sigemptyset(&act.sa_mask);
72 #if defined(ENABLE_JIT)
73 # if defined(ENABLE_INTRP)
76 /* catch NullPointerException/StackOverFlowException */
79 act.sa_sigaction = signal_handler_sigsegv;
80 act.sa_flags = SA_NODEFER | SA_SIGINFO;
83 sigaction(SIGSEGV, &act, NULL);
87 sigaction(SIGBUS, &act, NULL);
92 /* catch ArithmeticException */
94 #if defined(__I386__) || defined(__X86_64__)
95 act.sa_sigaction = signal_handler_sigfpe;
96 act.sa_flags = SA_NODEFER | SA_SIGINFO;
97 sigaction(SIGFPE, &act, NULL);
99 # if defined(ENABLE_INTRP)
102 #endif /* !defined(__INTRP__) */
105 /* catch SIGINT for exiting properly on <ctrl>-c */
107 act.sa_sigaction = signal_handler_sigint;
108 act.sa_flags = SA_SIGINFO;
109 sigaction(SIGINT, &act, NULL);
113 /* catch SIGQUIT for thread dump */
115 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
116 #if !defined(__FREEBSD__)
117 act.sa_sigaction = signal_handler_sigquit;
118 act.sa_flags = SA_SIGINFO;
119 sigaction(SIGQUIT, &act, NULL);
121 /* XXX boehm uses SIGUSR1 for suspend on freebsd */
123 act.sa_sigaction = signal_handler_sigusr1;
124 act.sa_flags = SA_SIGINFO;
125 sigaction(SIGUSR1, &act, NULL);
131 /* signal_handler_sigquit ******************************************************
135 *******************************************************************************/
137 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
138 void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p)
147 /* signal_handler_sigint *******************************************************
151 *******************************************************************************/
153 void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p)
155 /* exit the vm properly */
161 /* signal_handler_sigusr1 ******************************************************
165 *******************************************************************************/
167 #if defined(USE_THREADS) && defined(NATIVE_THREADS)
168 void signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p)
170 /* call stacktrace function */
172 stacktrace_dump_trace();
178 * These are local overrides for various environment variables in Emacs.
179 * Please do not remove this and leave it at the end of the file, where
180 * Emacs will automagically detect them.
181 * ---------------------------------------------------------------------
184 * indent-tabs-mode: t