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Diff for /gforth/engine/signals.c between versions 1.6 and 1.21

version 1.6, 2000/07/20 14:00:01 version 1.21, 2003/01/19 23:35:34
Line 1 Line 1
 /* signal handling  /* signal handling
   
   Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.    Copyright (C) 1995-2003 Free Software Foundation, Inc.
   
   This file is part of Gforth.    This file is part of Gforth.
   
Line 16 Line 16
   
   You should have received a copy of the GNU General Public License    You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software    along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   
 */  */
   
   
 #define _GNU_SOURCE  #include "config.h"
   #include "forth.h"
 #include <stdio.h>  #include <stdio.h>
 #include <setjmp.h>  #include <setjmp.h>
 #include <string.h>  #include <string.h>
Line 31 Line 31
 #include <sys/ioctl.h>  #include <sys/ioctl.h>
 #endif  #endif
 /* #include <asm/signal.h> */  /* #include <asm/signal.h> */
   #include <sys/types.h>
 #include <signal.h>  #include <signal.h>
 #include "config.h"  
 #include "forth.h"  
 #include "io.h"  #include "io.h"
   
   #ifndef HAVE_STACK_T
   /* Darwin uses "struct sigaltstack" instead of "stack_t" */
   typedef struct sigaltstack stack_t;
   #endif
   
 #define DEFAULTCOLS 80  #define DEFAULTCOLS 80
 #if defined(MSDOS) || defined (_WIN32)  #if defined(MSDOS) || defined (_WIN32)
Line 47 Line 50
 UCell cols=DEFAULTCOLS;  UCell cols=DEFAULTCOLS;
 UCell rows=DEFAULTROWS;  UCell rows=DEFAULTROWS;
   
   #ifndef SA_NODEFER
   #define SA_NODEFER 0
   /* systems that don't have SA_NODEFER hopefully don't block anyway */
   #endif
   
   #ifndef SA_ONSTACK
   #define SA_ONSTACK 0
   #endif
   
 #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 55  void install_signal_handler(int sig, voi Line 67  void install_signal_handler(int sig, voi
   
   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
Line 68  Sigfunc *bsd_signal(int signo, Sigfunc * Line 80  Sigfunc *bsd_signal(int signo, Sigfunc *
   
   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 109  static void fpe_handler(int sig, siginfo Line 121  static void fpe_handler(int sig, siginfo
   int code;    int code;
   
   switch(info->si_code) {    switch(info->si_code) {
   #ifdef FPE_INTDIV
   case FPE_INTDIV: code=-10; break; /* integer divide by zero */    case FPE_INTDIV: code=-10; break; /* integer divide by zero */
   #endif
   #ifdef FPE_INTOVF
   case FPE_INTOVF: code=-11; break; /* integer overflow */    case FPE_INTOVF: code=-11; break; /* integer overflow */
   #endif
   case FPE_FLTDIV: code=-42; break; /* floating point divide by zero */    case FPE_FLTDIV: code=-42; break; /* floating point divide by zero */
   case FPE_FLTOVF: code=-43; break; /* floating point overflow  */    case FPE_FLTOVF: code=-43; break; /* floating point overflow  */
   case FPE_FLTUND: code=-54; break; /* floating point underflow  */    case FPE_FLTUND: code=-54; break; /* floating point underflow  */
   case FPE_FLTRES: code=-41; break; /* floating point inexact result  */    case FPE_FLTRES: code=-41; break; /* floating point inexact result  */
   #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  */
   #endif
   default: code=-55; break;    default: code=-55; break;
   }    }
   longjmp(throw_jmp_buf,code);    longjmp(throw_jmp_buf,code);
Line 158  static void segv_handler(int sig, siginf Line 176  static void segv_handler(int sig, siginf
 #endif /* defined(SA_SIGINFO) */  #endif /* defined(SA_SIGINFO) */
   
 #ifdef SIGCONT  #ifdef SIGCONT
 static void termprep (int sig)  static void termprep(int sig)
 {  {
   bsd_signal(sig,termprep);    bsd_signal(sig,termprep);
   terminal_prepped=0;    terminal_prepped=0;
Line 169  void get_winsize() Line 187  void get_winsize()
 {  {
 #ifdef TIOCGWINSZ  #ifdef TIOCGWINSZ
   struct winsize size;    struct winsize size;
     size.ws_row = size.ws_col = 0;
       
   if (ioctl (1, TIOCGWINSZ, (char *) &size) >= 0) {    if (ioctl (1, TIOCGWINSZ, (char *) &size) >= 0) {
     rows = size.ws_row;      rows = size.ws_row;
Line 178  void get_winsize() Line 197  void get_winsize()
   char *s;    char *s;
   if ((s=getenv("LINES"))) {    if ((s=getenv("LINES"))) {
     rows=atoi(s);      rows=atoi(s);
     if (rows==0)  
       rows=DEFAULTROWS;  
   }    }
   if ((s=getenv("COLUMNS"))) {    if ((s=getenv("COLUMNS"))) {
     rows=atoi(s);      rows=atoi(s);
     if (rows==0)  
       cols=DEFAULTCOLS;  
   }    }
 #endif  #endif
     if (rows==0)
       rows=DEFAULTROWS;
     if (rows==0)
       cols=DEFAULTCOLS;
 }  }
   
 #ifdef SIGWINCH  #ifdef SIGWINCH
Line 350  void install_signal_handlers(void) Line 369  void install_signal_handlers(void)
   };    };
   int i;    int i;
   void (*throw_handler)() = die_on_signal ? graceful_exit : signal_throw;    void (*throw_handler)() = die_on_signal ? graceful_exit : signal_throw;
   #ifdef SIGSTKSZ 
     stack_t sigstack;
     int sas_retval=-1;
   
     sigstack.ss_size=SIGSTKSZ;
     if ((sigstack.ss_sp = my_alloc(sigstack.ss_size)) != NULL) {
       sigstack.ss_flags=0;
       sas_retval=sigaltstack(&sigstack,(stack_t *)0);
     }
     if (debug)
       fprintf(stderr,"sigaltstack: %s\n",strerror(sas_retval));
   #endif
   
 #define DIM(X)          (sizeof (X) / sizeof *(X))  #define DIM(X)          (sizeof (X) / sizeof *(X))
 /*  /*
Line 361  void install_signal_handlers(void) Line 392  void install_signal_handlers(void)
   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, fpe_handler);    if (!die_on_signal) {
   install_signal_handler(SIGSEGV, segv_handler);      install_signal_handler(SIGFPE, fpe_handler);
       install_signal_handler(SIGSEGV, segv_handler);
     }
 #endif  #endif
 #ifdef SIGCONT  #ifdef SIGCONT
     bsd_signal(SIGCONT, termprep);      bsd_signal(SIGCONT, termprep);
Removed from v.1.6  
changed lines
  Added in v.1.21

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