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95 lines
2.3 KiB
95 lines
2.3 KiB
19 years ago
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/*
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* jit-signal.c - Internal management routines to use Operating System
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* signals for libjit exceptions handling.
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*
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* Copyright (C) 2006 Southern Storm Software, Pty Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <config.h>
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#ifdef JIT_USE_SIGNALS
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#include "jit-internal.h"
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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/*
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* Use SIGSEGV for builtin libjit exception.
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*/
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static void sigsegv_handler(int signum, siginfo_t *info, void *uap)
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{
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jit_exception_builtin(JIT_RESULT_NULL_REFERENCE);
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}
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/*
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* Use SIGFPE for builtin libjit exception.
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*/
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static void sigfpe_handler(int signum, siginfo_t *info, void *uap)
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{
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switch(info->si_code)
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{
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case FPE_INTDIV:
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jit_exception_builtin(JIT_RESULT_DIVISION_BY_ZERO);
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break;
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case FPE_INTOVF:
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jit_exception_builtin(JIT_RESULT_OVERFLOW);
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break;
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case FPE_FLTDIV:
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jit_exception_builtin(JIT_RESULT_DIVISION_BY_ZERO);
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break;
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case FPE_FLTOVF:
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jit_exception_builtin(JIT_RESULT_OVERFLOW);
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break;
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case FPE_FLTUND:
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jit_exception_builtin(JIT_RESULT_ARITHMETIC);
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break;
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case FPE_FLTSUB:
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jit_exception_builtin(JIT_RESULT_ARITHMETIC);
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break;
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default:
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jit_exception_builtin(JIT_RESULT_ARITHMETIC);
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break;
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}
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}
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/*
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* Initialize signal handlers.
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*/
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void _jit_signal_init(void)
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{
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struct sigaction sa_fpe, sa_segv;
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sa_fpe.sa_sigaction = sigfpe_handler;
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sigemptyset(&sa_fpe.sa_mask);
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sa_fpe.sa_flags = SA_SIGINFO;
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if (sigaction(SIGFPE, &sa_fpe, 0)) {
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perror("Sigaction SIGFPE");
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exit(1);
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}
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sa_segv.sa_sigaction = sigsegv_handler;
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sigemptyset(&sa_segv.sa_mask);
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sa_segv.sa_flags = SA_SIGINFO;
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if (sigaction(SIGSEGV, &sa_segv, 0)) {
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perror("Sigaction SIGSEGV");
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exit(1);
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}
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}
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#endif /* JIT_USE_SIGNALS */
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