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 5038 2006-06-19 22:22:34Z twisti $
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_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 = md_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 = md_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);
115 /* catch SIGQUIT for thread dump */
117 #if defined(ENABLE_THREADS)
118 #if !defined(__FREEBSD__)
119 act.sa_sigaction = signal_handler_sigquit;
120 act.sa_flags = SA_SIGINFO;
121 sigaction(SIGQUIT, &act, NULL);
123 /* XXX boehm uses SIGUSR1 for suspend on freebsd */
125 act.sa_sigaction = signal_handler_sigusr1;
126 act.sa_flags = SA_SIGINFO;
127 sigaction(SIGUSR1, &act, NULL);
131 #if defined(ENABLE_THREADS) && defined(ENABLE_PROFILING)
132 /* install signal handler for profiling sampling */
134 act.sa_sigaction = md_signal_handler_sigusr2;
135 act.sa_flags = SA_SIGINFO;
136 sigaction(SIGUSR2, &act, NULL);
141 /* signal_handler_sigquit ******************************************************
145 *******************************************************************************/
147 #if defined(ENABLE_THREADS)
148 void signal_handler_sigquit(int sig, siginfo_t *siginfo, void *_p)
157 /* signal_handler_sigint *******************************************************
159 Handler for SIGINT (<ctrl>-c) which shuts down CACAO properly with
162 *******************************************************************************/
164 void signal_handler_sigint(int sig, siginfo_t *siginfo, void *_p)
166 /* if we are already in Runtime.exit(), just do it hardcore */
169 fprintf(stderr, "Caught SIGINT while already shutting down. Shutdown aborted...\n");
173 /* exit the vm properly */
179 /* signal_handler_sigusr1 ******************************************************
183 *******************************************************************************/
185 #if defined(ENABLE_THREADS)
186 void signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p)
188 /* call stacktrace function */
190 stacktrace_dump_trace();
196 * These are local overrides for various environment variables in Emacs.
197 * Please do not remove this and leave it at the end of the file, where
198 * Emacs will automagically detect them.
199 * ---------------------------------------------------------------------
202 * indent-tabs-mode: t