version 1.13, 2002/01/05 22:59:00
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version 1.36, 2007/04/01 13:31:26
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/* signal handling |
/* signal handling |
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Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. |
Copyright (C) 1995,1996,1997,1998,2000,2003,2006 Free Software Foundation, Inc. |
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This file is part of Gforth. |
This file is part of Gforth. |
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*/ |
*/ |
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#define _GNU_SOURCE |
#include "config.h" |
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#include "forth.h" |
#include <stdio.h> |
#include <stdio.h> |
#include <setjmp.h> |
#include <setjmp.h> |
#include <string.h> |
#include <string.h> |
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Line 31
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#include <sys/ioctl.h> |
#include <sys/ioctl.h> |
#endif |
#endif |
/* #include <asm/signal.h> */ |
/* #include <asm/signal.h> */ |
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#include <sys/types.h> |
#include <signal.h> |
#include <signal.h> |
#include "config.h" |
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#include "forth.h" |
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#include "io.h" |
#include "io.h" |
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#ifndef HAVE_STACK_T |
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/* Darwin uses "struct sigaltstack" instead of "stack_t" */ |
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typedef struct sigaltstack stack_t; |
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#endif |
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#define DEFAULTCOLS 80 |
#define DEFAULTCOLS 80 |
#if defined(MSDOS) || defined (_WIN32) |
#if defined(MSDOS) || defined (_WIN32) || defined (__CYGWIN__) |
#define DEFAULTROWS 25 |
#define DEFAULTROWS 25 |
#else |
#else |
#define DEFAULTROWS 24 |
#define DEFAULTROWS 24 |
Line 52 UCell rows=DEFAULTROWS;
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Line 55 UCell rows=DEFAULTROWS;
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/* systems that don't have SA_NODEFER hopefully don't block anyway */ |
/* systems that don't have SA_NODEFER hopefully don't block anyway */ |
#endif |
#endif |
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#ifndef SA_ONSTACK |
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#define SA_ONSTACK 0 |
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#endif |
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#ifdef SA_SIGINFO |
#ifdef SA_SIGINFO |
void install_signal_handler(int sig, void (*handler)(int, siginfo_t *, void *)) |
void install_signal_handler(int sig, void (*handler)(int, siginfo_t *, void *)) |
/* installs three-argument signal handler for sig */ |
/* installs three-argument signal handler for sig */ |
Line 60 void install_signal_handler(int sig, voi
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Line 67 void install_signal_handler(int sig, voi
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action.sa_sigaction=handler; |
action.sa_sigaction=handler; |
sigemptyset(&action.sa_mask); |
sigemptyset(&action.sa_mask); |
action.sa_flags=SA_RESTART|SA_NODEFER|SA_SIGINFO; /* pass siginfo */ |
action.sa_flags=SA_RESTART|SA_NODEFER|SA_SIGINFO|SA_ONSTACK; /* pass siginfo */ |
sigaction(sig, &action, NULL); |
sigaction(sig, &action, NULL); |
} |
} |
#endif |
#endif |
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typedef void Sigfunc(int); |
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Sigfunc *bsd_signal(int signo, Sigfunc *func) |
Sigfunc *bsd_signal(int signo, Sigfunc *func) |
{ |
{ |
struct sigaction act, oact; |
struct sigaction act, oact; |
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act.sa_handler=func; |
act.sa_handler=func; |
sigemptyset(&act.sa_mask); |
sigemptyset(&act.sa_mask); |
act.sa_flags=SA_NODEFER; |
act.sa_flags=SA_NODEFER; /* SA_ONSTACK does not work for graceful_exit */ |
if (sigaction(signo,&act,&oact) < 0) |
if (sigaction(signo,&act,&oact) < 0) |
return SIG_ERR; |
return SIG_ERR; |
else |
else |
Line 90 graceful_exit (int sig)
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Line 95 graceful_exit (int sig)
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jmp_buf throw_jmp_buf; |
jmp_buf throw_jmp_buf; |
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void throw(int code) |
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{ |
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longjmp(throw_jmp_buf,code); /* !! or use siglongjmp ? */ |
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} |
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static void |
static void |
signal_throw(int sig) |
signal_throw(int sig) |
{ |
{ |
Line 102 signal_throw(int sig)
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Line 112 signal_throw(int sig)
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case SIGBUS: code=-23; break; |
case SIGBUS: code=-23; break; |
#endif |
#endif |
case SIGSEGV: code=-9; break; |
case SIGSEGV: code=-9; break; |
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#ifdef SIGPIPE |
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case SIGPIPE: code=-2049; break; |
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#endif |
default: code=-256-sig; break; |
default: code=-256-sig; break; |
} |
} |
longjmp(throw_jmp_buf,code); /* !! or use siglongjmp ? */ |
#ifdef __CYGWIN__ |
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/* the SA_NODEFER apparently does not work on Cygwin 1.3.18(0.69/3/2) */ |
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{ |
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sigset_t emptyset; |
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sigemptyset(&emptyset); |
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sigprocmask(SIG_SETMASK, &emptyset, NULL); |
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} |
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#endif |
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throw(code); |
} |
} |
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#ifdef SA_SIGINFO |
#ifdef SA_SIGINFO |
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static void |
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sigaction_throw(int sig, siginfo_t *info, void *_) |
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{ |
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signal_throw(sig); |
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} |
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static void fpe_handler(int sig, siginfo_t *info, void *_) |
static void fpe_handler(int sig, siginfo_t *info, void *_) |
/* handler for SIGFPE */ |
/* handler for SIGFPE */ |
{ |
{ |
int code; |
int code; |
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switch(info->si_code) { |
switch(info->si_code) { |
case FPE_INTDIV: code=-10; break; /* integer divide by zero */ |
#ifdef FPE_INTDIV |
case FPE_INTOVF: code=-11; break; /* integer overflow */ |
case FPE_INTDIV: code=BALL_DIVZERO; break; |
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#endif |
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#ifdef FPE_INTOVF |
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case FPE_INTOVF: code=BALL_RESULTRANGE; break; /* integer overflow */ |
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#endif |
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#ifdef FPE_FLTDIV |
case FPE_FLTDIV: code=-42; break; /* floating point divide by zero */ |
case FPE_FLTDIV: code=-42; break; /* floating point divide by zero */ |
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#endif |
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#ifdef FPE_FLTOVF |
case FPE_FLTOVF: code=-43; break; /* floating point overflow */ |
case FPE_FLTOVF: code=-43; break; /* floating point overflow */ |
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#endif |
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#ifdef FPE_FLTUND |
case FPE_FLTUND: code=-54; break; /* floating point underflow */ |
case FPE_FLTUND: code=-54; break; /* floating point underflow */ |
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#endif |
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#ifdef FPE_FLTRES |
case FPE_FLTRES: code=-41; break; /* floating point inexact result */ |
case FPE_FLTRES: code=-41; break; /* floating point inexact result */ |
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#endif |
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#if 0 /* defined by Unix95, but unnecessary */ |
case FPE_FLTINV: /* invalid floating point operation */ |
case FPE_FLTINV: /* invalid floating point operation */ |
case FPE_FLTSUB: /* subscript out of range */ |
case FPE_FLTSUB: /* subscript out of range */ |
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#endif |
default: code=-55; break; |
default: code=-55; break; |
} |
} |
longjmp(throw_jmp_buf,code); |
throw(code); |
} |
} |
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Line 157 static void segv_handler(int sig, siginf
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Line 198 static void segv_handler(int sig, siginf
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code=-44; |
code=-44; |
else if (JUSTOVER(addr, NEXTPAGE(h->fp_stack_base+h->fp_stack_size))) |
else if (JUSTOVER(addr, NEXTPAGE(h->fp_stack_base+h->fp_stack_size))) |
code=-45; |
code=-45; |
longjmp(throw_jmp_buf,code); |
throw(code); |
} |
} |
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#endif /* defined(SA_SIGINFO) */ |
#endif /* defined(SA_SIGINFO) */ |
Line 278 void install_signal_handlers(void)
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Line 319 void install_signal_handlers(void)
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}; |
}; |
#endif |
#endif |
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static short async_sigs_to_throw [] = { |
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#ifdef SIGINT |
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SIGINT, |
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#endif |
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#ifdef SIGALRM |
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SIGALRM, |
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#endif |
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#ifdef SIGPOLL |
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SIGPOLL, |
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#endif |
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#ifdef SIGPROF |
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SIGPROF, |
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#endif |
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#ifdef SIGURG |
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SIGURG, |
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#endif |
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#ifdef SIGPIPE |
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SIGPIPE, |
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#endif |
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#ifdef SIGUSR1 |
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SIGUSR1, |
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#endif |
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#ifdef SIGUSR2 |
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SIGUSR2, |
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#endif |
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#ifdef SIGVTALRM |
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SIGVTALRM, |
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#endif |
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#ifdef SIGXFSZ |
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SIGXFSZ, |
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#endif |
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}; |
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static short sigs_to_throw [] = { |
static short sigs_to_throw [] = { |
#ifdef SIGBREAK |
#ifdef SIGBREAK |
SIGBREAK, |
SIGBREAK, |
#endif |
#endif |
#ifdef SIGINT |
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SIGINT, |
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#endif |
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#ifdef SIGILL |
#ifdef SIGILL |
SIGILL, |
SIGILL, |
#endif |
#endif |
Line 300 void install_signal_handlers(void)
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Line 371 void install_signal_handlers(void)
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#ifdef SIGSEGV |
#ifdef SIGSEGV |
SIGSEGV, |
SIGSEGV, |
#endif |
#endif |
#ifdef SIGALRM |
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SIGALRM, |
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#endif |
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#ifdef SIGPIPE |
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SIGPIPE, |
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#endif |
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#ifdef SIGPOLL |
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SIGPOLL, |
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#endif |
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#ifdef SIGPROF |
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SIGPROF, |
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#endif |
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#ifdef SIGBUS |
#ifdef SIGBUS |
SIGBUS, |
SIGBUS, |
#endif |
#endif |
Line 321 void install_signal_handlers(void)
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Line 380 void install_signal_handlers(void)
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#ifdef SIGTRAP |
#ifdef SIGTRAP |
SIGTRAP, |
SIGTRAP, |
#endif |
#endif |
#ifdef SIGURG |
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SIGURG, |
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#endif |
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#ifdef SIGUSR1 |
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SIGUSR1, |
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#endif |
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#ifdef SIGUSR2 |
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SIGUSR2, |
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#endif |
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#ifdef SIGVTALRM |
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SIGVTALRM, |
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#endif |
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#ifdef SIGXFSZ |
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SIGXFSZ, |
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#endif |
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}; |
}; |
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static short sigs_to_quit [] = { |
static short sigs_to_quit [] = { |
#ifdef SIGQUIT |
#ifdef SIGQUIT |
SIGQUIT, |
SIGQUIT, |
Line 356 void install_signal_handlers(void)
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Line 401 void install_signal_handlers(void)
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}; |
}; |
int i; |
int i; |
void (*throw_handler)() = die_on_signal ? graceful_exit : signal_throw; |
void (*throw_handler)() = die_on_signal ? graceful_exit : signal_throw; |
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#ifdef SIGSTKSZ |
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stack_t sigstack; |
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int sas_retval=-1; |
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sigstack.ss_size=SIGSTKSZ; |
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/* Actually the stack should only be ss_size large, and according to |
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SUSv2 ss_sp should point to the start of the stack, but |
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unfortunately Irix 6.5 (at least) expects ss_sp to point to the |
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end, so we work around this issue by accomodating everyone. */ |
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if ((sigstack.ss_sp = gforth_alloc(sigstack.ss_size*2)) != NULL) { |
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sigstack.ss_sp += sigstack.ss_size; |
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sigstack.ss_flags=0; |
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sas_retval=sigaltstack(&sigstack,(stack_t *)0); |
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} |
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#if defined(HAS_FILE) || !defined(STANDALONE) |
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if (debug) |
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fprintf(stderr,"sigaltstack: %s\n",strerror(sas_retval)); |
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#endif |
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#endif |
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#define DIM(X) (sizeof (X) / sizeof *(X)) |
#define DIM(X) (sizeof (X) / sizeof *(X)) |
/* |
/* |
Line 364 void install_signal_handlers(void)
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Line 428 void install_signal_handlers(void)
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*/ |
*/ |
for (i = 0; i < DIM (sigs_to_throw); i++) |
for (i = 0; i < DIM (sigs_to_throw); i++) |
bsd_signal(sigs_to_throw[i], throw_handler); |
bsd_signal(sigs_to_throw[i], throw_handler); |
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for (i = 0; i < DIM (async_sigs_to_throw); i++) |
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bsd_signal(async_sigs_to_throw[i], |
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ignore_async_signals ? SIG_IGN : throw_handler); |
for (i = 0; i < DIM (sigs_to_quit); i++) |
for (i = 0; i < DIM (sigs_to_quit); i++) |
bsd_signal(sigs_to_quit [i], graceful_exit); |
bsd_signal(sigs_to_quit [i], graceful_exit); |
#ifdef SA_SIGINFO |
#ifdef SA_SIGINFO |
install_signal_handler(SIGFPE, die_on_signal ? graceful_exit : fpe_handler); |
if (!die_on_signal) { |
install_signal_handler(SIGSEGV, die_on_signal ? graceful_exit : segv_handler); |
#ifdef SIGFPE |
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install_signal_handler(SIGFPE, fpe_handler); |
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#endif |
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#ifdef SIGSEGV |
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install_signal_handler(SIGSEGV, segv_handler); |
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#endif |
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/* use SA_ONSTACK for all signals that could come from executing |
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wrong code */ |
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#ifdef SIGILL |
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install_signal_handler(SIGILL, sigaction_throw); |
#endif |
#endif |
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#ifdef SIGBUS |
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install_signal_handler(SIGBUS, sigaction_throw); |
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#endif |
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#ifdef SIGTRAP |
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install_signal_handler(SIGTRAP, sigaction_throw); |
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#endif |
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} |
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#endif /* defined(SA_SIGINFO) */ |
#ifdef SIGCONT |
#ifdef SIGCONT |
bsd_signal(SIGCONT, termprep); |
bsd_signal(SIGCONT, termprep); |
#endif |
#endif |