[occt.git] / src / OSD / OSD_signal.cxx

// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#include <OSD.ixx>

#ifndef WNT

//---------- All Systems except Windows NT : ----------------------------------

# include <stdio.h>

#include <OSD_WhoAmI.hxx>
#include <OSD_SIGHUP.hxx>
#include <OSD_SIGINT.hxx>
#include <OSD_SIGQUIT.hxx>
#include <OSD_SIGILL.hxx>
#include <OSD_SIGKILL.hxx>
#include <OSD_SIGBUS.hxx>
#include <OSD_SIGSEGV.hxx>
#include <OSD_SIGSYS.hxx>
#include <OSD_Exception_CTRL_BREAK.hxx>
#include <Standard_NumericError.hxx>
#include <Standard_DivideByZero.hxx>
#include <Standard_Overflow.hxx>

#include <Standard_ErrorHandler.hxx>

// POSIX threads
#include <pthread.h>

#ifdef linux
#include <fenv.h>
static Standard_Boolean fFltExceptions = Standard_False;
#endif

// variable signalling that Control-C has been pressed (SIGINT signal)
static Standard_Boolean fCtrlBrk;

//const OSD_WhoAmI Iam = OSD_WPackage;

typedef void (ACT_SIGIO_HANDLER)(void) ;
ACT_SIGIO_HANDLER *ADR_ACT_SIGIO_HANDLER = NULL ;

#ifdef DECOSF1
typedef void (* SIG_PFV) (int);
#endif

#ifdef __GNUC__
# include <stdlib.h>
# include <stdio.h>
#else
#  ifdef SA_SIGINFO 
#    ifndef _AIX
#  include <sys/siginfo.h>
#     endif
#  endif
#endif
typedef void (* SIG_PFV) (int);

#include <signal.h>
#include <sys/signal.h>

#if defined(HAVE_PTHREAD_H) && defined(NO_CXX_EXCEPTION) 
//============================================================================
//====  GetOldSigAction
//====     get previous 
//============================================================================

static struct sigaction *GetOldSigAction() 
{
  static struct sigaction oldSignals[NSIG];
  return oldSignals;
}

#ifdef SOLARIS
static sigfpe_handler_type *GetOldFPE()
{
  static sigfpe_handler_type aIEEEHandler[5] = { NULL, NULL, NULL, NULL, NULL } ;
  return aIEEEHandler;
}
#endif
#endif

//============================================================================
//==== Handler
//====     Catche the differents signals:
//====          1- The Fatal signals, which cause the end of process:
//====          2- The exceptions which are "signaled" by Raise.
//====     The Fatal Signals:
//====        SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGKILL, SIGBUS, SIGSYS
//====     The Exceptions:
//====        SIGFPE
//====         (SUN versions)
//====           FPE_INTOVF_TRAP    // ..... integer overflow
//====           FPE_INTDIV_TRAP    // ..... integer divide by zero
//====           FPE_FLTINEX_TRAP   // ..... [floating inexact result]
//====           FPE_FLTDIV_TRAP    // ..... [floating divide by zero]
//====           FPE_FLTUND_TRAP    // ..... [floating underflow]
//====           FPE_FLTOPER_TRAP   // ..... [floating inexact result]
//====           FPE_FLTOVF_TRAP    // ..... [floating overflow]
//==== SIGSEGV is handled by "SegvHandler()"
//============================================================================
#ifdef SA_SIGINFO
static void Handler (const int theSignal, siginfo_t *theSigInfo, const Standard_Address theContext)
#else
static void Handler (const int theSignal)
#endif
{
  struct sigaction oldact, act;
  // re-install the signal
  if ( ! sigaction (theSignal, NULL, &oldact) ) {
    // cout << " signal is " << theSignal << " handler is " <<  oldact.sa_handler << endl;
    if (sigaction (theSignal, &oldact, &act)) perror ("sigaction");
  }
  else {
    perror ("sigaction");
  }

  siginfo_t * aSigInfo = NULL;
#ifdef SA_SIGINFO
  aSigInfo = theSigInfo;
#endif

#if defined(HAVE_PTHREAD_H) && defined(NO_CXX_EXCEPTION)
  if (pthread_self() != getOCCThread()  || !Standard_ErrorHandler::IsInTryBlock()) {
    // use the previous signal handler
    // cout << "OSD::Handler: signal " << (int) theSignal << " occured outside a try block " <<  endl ;
    struct sigaction *oldSignals = GetOldSigAction();
    struct sigaction  asigacthandler =  oldSignals[theSignal >= 0 && theSignal < NSIG ? theSignal : 0];

    if (asigacthandler.sa_flags & SA_SIGINFO) {
      void (*aCurInfoHandle)(int, siginfo_t *, void *) = asigacthandler.sa_sigaction;
      if (aSigInfo) {
        switch (aSigInfo->si_signo) {
          case SIGFPE:
          {
#ifdef SOLARIS
            sigfpe_handler_type *aIEEEHandlerTab = GetOldFPE();
            sigfpe_handler_type  aIEEEHandler = NULL;
            switch (aSigInfo->si_code) {
              case FPE_INTDIV_TRAP :
              case FPE_FLTDIV_TRAP :
               aIEEEHandler = aIEEEHandlerTab[1];
                break;
              case FPE_INTOVF_TRAP :
              case FPE_FLTOVF_TRAP :
                aIEEEHandler = aIEEEHandlerTab[2];
                break;
              case FPE_FLTUND_TRAP :
                aIEEEHandler = aIEEEHandlerTab[4];
                break;
              case FPE_FLTRES_TRAP :
                aIEEEHandler = aIEEEHandlerTab[3];
                break;
              case FPE_FLTINV_TRAP :
                aIEEEHandler = aIEEEHandlerTab[0];
                break;
              case FPE_FLTSUB_TRAP :
              default:
                break;
            }
            if (aIEEEHandler) {
              // cout << "OSD::Handler: calling previous IEEE signal handler with info" <<  endl ;
              (*aIEEEHandler) (theSignal, aSigInfo, theContext);
              return;
            }
#endif
            break;
          }
          default:
            break;
        }
      }
      if (aCurInfoHandle) {
        // cout << "OSD::Handler: calling previous signal handler with info " << aCurInfoHandle <<  endl ;
        (*aCurInfoHandle) (theSignal, aSigInfo, theContext);
        cerr << " previous signal handler return" <<  endl ;
        return;
      }
      else {
	// cout << "OSD::Handler: no handler with info for the signal" << endl;
      }
    }
    else {
      // no siginfo needed for the signal
      void (*aCurHandler) (int) = asigacthandler.sa_handler;
      if(aCurHandler) {
        // cout << "OSD::Handler: calling previous signal handler" <<  endl ;
        (*aCurHandler) (theSignal);
        cerr << " previous signal handler return" <<  endl ;
        return;
      }
    }
    // cout << " Signal occured outside a try block, but no handler for it" <<endl;
    return;
  }
#endif

  // cout << "OSD::Handler: signal " << (int) theSignal << " occured inside a try block " <<  endl ;
  if ( ADR_ACT_SIGIO_HANDLER != NULL )
    (*ADR_ACT_SIGIO_HANDLER)() ;
#ifdef linux
  if (fFltExceptions)
    feenableexcept (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW);
    //feenableexcept (FE_INVALID | FE_DIVBYZERO);
#endif
  sigset_t set;
  sigemptyset(&set);
  switch (theSignal) {
  case SIGHUP:
    OSD_SIGHUP::NewInstance("SIGHUP 'hangup' detected.")->Jump();
    exit(SIGHUP);
    break;
  case SIGINT:
    // For safe handling of Control-C as stop event, arm a variable but do not
    // generate longjump (we are out of context anyway)
    fCtrlBrk = Standard_True;
    // OSD_SIGINT::NewInstance("SIGINT 'interrupt' detected.")->Jump();
    // exit(SIGINT);
    break;
  case SIGQUIT:
    OSD_SIGQUIT::NewInstance("SIGQUIT 'quit' detected.")->Jump();
    exit(SIGQUIT);
    break;
  case SIGILL:
    OSD_SIGILL::NewInstance("SIGILL 'illegal instruction' detected.")->Jump();
    exit(SIGILL);
    break;
  case SIGKILL:
    OSD_SIGKILL::NewInstance("SIGKILL 'kill' detected.")->Jump();
    exit(SIGKILL);
    break;
  case SIGBUS:
    sigaddset(&set, SIGBUS);
    sigprocmask(SIG_UNBLOCK, &set, NULL) ;
    OSD_SIGBUS::NewInstance("SIGBUS 'bus error' detected.")->Jump();
    exit(SIGBUS);
    break;
  case SIGSEGV:
    OSD_SIGSEGV::NewInstance("SIGSEGV 'segmentation violation' detected.")->Jump();
    exit(SIGSEGV);
    break;
#ifdef SIGSYS
  case SIGSYS:
    OSD_SIGSYS::NewInstance("SIGSYS 'bad argument to system call' detected.")->Jump();
    exit(SIGSYS);
    break;
#endif
  case SIGFPE:
    sigaddset(&set, SIGFPE);
    sigprocmask(SIG_UNBLOCK, &set, NULL) ;
#ifdef DECOSF1
    // Pour DEC/OSF1 SIGFPE = Division par zero.
    // should be clarified why in debug mode only?
#ifdef DEBUG
    Standard_DivideByZero::NewInstance('')->Jump;
#endif
    break;
#endif
#if (!defined (__sun)) && (!defined(SOLARIS))
    Standard_NumericError::NewInstance("SIGFPE Arithmetic exception detected")->Jump();
    break;
#else
    // Reste SOLARIS
    if (aSigInfo) {
      switch(aSigInfo->si_code) {
      case FPE_FLTDIV_TRAP :
        Standard_DivideByZero::NewInstance("Floating Divide By Zero")->Jump();
        break;
      case FPE_INTDIV_TRAP :
        Standard_DivideByZero::NewInstance("Integer Divide By Zero")->Jump();
        break;
      case FPE_FLTOVF_TRAP :
        Standard_Overflow::NewInstance("Floating Overflow")->Jump();
        break;
      case FPE_INTOVF_TRAP :
        Standard_Overflow::NewInstance("Integer Overflow")->Jump();
        break;
      case FPE_FLTUND_TRAP :
        Standard_NumericError::NewInstance("Floating Underflow")->Jump();
        break;
      case FPE_FLTRES_TRAP:
        Standard_NumericError::NewInstance("Floating Point Inexact Result")->Jump();
        break;
      case FPE_FLTINV_TRAP :
        Standard_NumericError::NewInstance("Invalid Floating Point Operation")->Jump();
        break;
      default:
        Standard_NumericError::NewInstance("Numeric Error")->Jump();
        break;
      }
    } else {
      Standard_NumericError::NewInstance("SIGFPE Arithmetic exception detected")->Jump();
    }
#endif
    break;
#if defined (__sgi) || defined(IRIX)
  case SIGTRAP:
    sigaddset(&set, SIGTRAP);
    sigprocmask(SIG_UNBLOCK, &set, NULL) ;
    Standard_DivideByZero::NewInstance("SIGTRAP IntegerDivideByZero")->Jump(); break;
#endif
  default:
    cout << "Unexpected signal " << theSignal << endl ;
    break;
  }
}

//============================================================================
//==== SegvHandler
//============================================================================
#ifdef SA_SIGINFO

static void SegvHandler(const int theSignal,
                        siginfo_t *ip,
                        const Standard_Address theContext)
{
#ifdef NO_CXX_EXCEPTION
  if (!Standard_ErrorHandler::IsInTryBlock()) {
    Handler(theSignal, ip, theContext);
    return;
  }
#endif
#ifdef linux
  if (fFltExceptions)
    feenableexcept (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW);
    //feenableexcept (FE_INVALID | FE_DIVBYZERO);
#endif
//  cout << "OSD::SegvHandler activated(SA_SIGINFO)" << endl ;
  if ( ip != NULL ) {
     sigset_t set;
     sigemptyset(&set);
     sigaddset(&set, SIGSEGV);
     sigprocmask (SIG_UNBLOCK, &set, NULL) ;
     void *address = ip->si_addr ;
     {
       char Msg[100];
       sprintf(Msg,"SIGSEGV 'segmentation violation' detected. Address %lx",
         (long ) address ) ;
       OSD_SIGSEGV::NewInstance(Msg)->Jump();
     }
  }
  else {
    cout << "Wrong undefined address." << endl ;
  }
  exit(SIGSEGV);
}

#elif defined (_hpux) || defined(HPUX)
// Not ACTIVE ? SA_SIGINFO is defined on SUN, OSF, SGI and HP (and Linux) !
// pour version 09.07

static void SegvHandler(const int theSignal,
                        siginfo_t *ip,
                        const Standard_Address theContext)
{
  unsigned long Space  ;
  unsigned long Offset ;
  char Msg[100] ;

  if ( theContext != NULL ) {
    Space = ((struct sigcontext *)theContext)->sc_sl.sl_ss.ss_cr20 ;
    Offset = ((struct sigcontext *)theContext)->sc_sl.sl_ss.ss_cr21 ;
//    cout << "Wrong address = " << hex(Offset) << endl ;
    {
      sprintf(Msg,"SIGSEGV 'segmentation violation' detected. Address %lx",Offset) ;
      OSD_SIGSEGV::Jump(Msg);
//    scp->sc_pcoq_head = scp->sc_pcoq_tail ;       Permettrait de continuer a
//    scp->sc_pcoq_tail = scp->sc_pcoq_tail + 0x4 ; l'intruction suivant le segv.
    }
  }
  else {
    cout << "Wrong undefined address." << endl ;
  }
  exit(SIGSEGV);
}

#endif

//============================================================================
//==== SetSignal 
//====     Set the differents signals:
//============================================================================

void OSD::SetSignal(const Standard_Boolean aFloatingSignal) 
{
  static int first_time = 3 ;
  struct sigaction act, oact;
  int              stat = 0;

  if( aFloatingSignal ) {
    //==== Enable the floating point exceptions ===============
#if defined (__sun) || defined (SOLARIS)
    sigfpe_handler_type PHandler = (sigfpe_handler_type) Handler ;
    stat = ieee_handler("set", "invalid",  PHandler);
    stat = ieee_handler("set", "division", PHandler) || stat;
    stat = ieee_handler("set", "overflow", PHandler) || stat;

    //stat = ieee_handler("set", "underflow", PHandler) || stat;
    //stat = ieee_handler("set", "inexact", PHandler) || stat;

    if (stat) {
      cerr << "ieee_handler does not work !!! KO " << endl;
    }
#elif defined (linux)
    feenableexcept (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW);
    //feenableexcept (FE_INVALID | FE_DIVBYZERO);
    fFltExceptions = Standard_True;
#endif
  }
  else if ( first_time & 1 ) {
//    cout << "SetSignal( Standard_False ) is not implemented..." << endl ;
    first_time = first_time & (~ 1) ;
  }

#if defined (sgi) || defined (IRIX )
 if ( first_time & 2 ) {
   char *TRAP_FPE = getenv("TRAP_FPE") ;
   if ( TRAP_FPE == NULL ) {
     cout << "On SGI you must set TRAP_FPE environment variable : " << endl ;
     cout << "set env(TRAP_FPE) \"UNDERFL=FLUSH_ZERO;OVERFL=DEFAULT;DIVZERO=DEFAULT;INT_OVERFL=DEFAULT\" or" << endl ;
     cout << "setenv TRAP_FPE \"UNDERFL=FLUSH_ZERO;OVERFL=DEFAULT;DIVZERO=DEFAULT;INT_OVERFL=DEFAULT\"" << endl ;
//     exit(1) ;
     first_time = first_time & (~ 2) ;
   }
 }
#endif

  //==== Save the old Signal Handler, and set the new one ===================

  sigemptyset(&act.sa_mask) ;

#ifdef SA_RESTART
  act.sa_flags   = SA_RESTART ;
#else
  act.sa_flags   = 0 ;
#endif
#ifdef SA_SIGINFO
  act.sa_flags = act.sa_flags | SA_SIGINFO ;
  act.sa_sigaction = /*(void(*)(int, siginfo_t *, void*))*/ Handler;
#else
  act.sa_handler = /*(SIG_PFV)*/ Handler;
#endif

  //==== Always detected the signal "SIGFPE" =================================
  stat = sigaction(SIGFPE,&act,&oact);   // ...... floating point exception 
  if (stat) {
     cerr << "sigaction does not work !!! KO " << endl;
     perror("sigaction ");
  }

  //==== Detected the only the "free" signals ================================
  sigaction(SIGHUP,&act,&oact);    // ...... hangup  

#ifdef OBJS
  if(oact.sa_handler) 
	sigaction(SIGHUP,&oact,&oact);
#endif

  sigaction(SIGINT,&act,&oact);   // ...... interrupt   

#ifdef OBJS
  if(oact.sa_handler) 
	sigaction(SIGINT,&oact,&oact);
#endif
            
  sigaction(SIGQUIT,&act,&oact);  // ...... quit

#ifdef OBJS
  if(oact.sa_handler) 
	sigaction(SIGQUIT,&oact,&oact);
#endif

  sigaction(SIGILL,&act,&oact);   // ...... illegal instruction 

#ifdef OBJS
  if(oact.sa_handler) 
	sigaction(SIGILL,&oact,&oact);
#endif

  sigaction(SIGBUS,&act,&oact);   // ...... bus error 

#ifdef OBJS
  if(oact.sa_handler) 
	sigaction(SIGBUS,&oact,&oact);
#endif

#if (!defined (linux)) && (!defined(LININTEL))
  sigaction(SIGSYS,&act,&oact);   // ...... bad argument to system call

# ifdef OBJS
  if(oact.sa_handler) 
	sigaction(SIGSYS,&oact,&oact);
# endif
#endif

#if defined (__sgi) || defined(IRIX)
  sigaction(SIGTRAP,&act,&oact);   // Integer Divide By Zero (IRIX)

# ifdef OBJS
  if(oact.sa_handler) 
	sigaction(SIGTRAP,&oact,&oact);
# endif
#endif

#ifdef SA_SIGINFO
  act.sa_sigaction = /*(void(*)(int, siginfo_t *, void*))*/ SegvHandler;
#else
  act.sa_handler = /*(SIG_PFV)*/ SegvHandler;
#endif

  if ( sigaction( SIGSEGV , &act , &oact ) )  // ...... segmentation violation
    perror("OSD::SetSignal sigaction( SIGSEGV , &act , &oact ) ") ;

#ifdef OBJS
  if(oact.sa_handler) 
	sigaction(SIGSEGV,&oact,&oact);
#endif
#if defined(__osf__) || defined(DECOSF1)
   struct sigaction action, prev_action;
   action.sa_handler = SIG_IGN;
   action.sa_mask = 0;
   action.sa_flags = 0;
   
   if (sigaction (SIGFPE, &action, &prev_action) == -1) {
     perror ("sigaction");
     exit (1);
   }
#endif

}

//============================================================================
//==== ControlBreak 
//============================================================================

void OSD :: ControlBreak () 
{
  if ( fCtrlBrk ) {
    fCtrlBrk = Standard_False;
    OSD_Exception_CTRL_BREAK::Raise ("*** INTERRUPT ***");
  }
}

#endif
Commit	Line	Data
973c2be1	1	// Copyright (c) 1999-2014 OPEN CASCADE SAS
b311480e	2	//
973c2be1	3	// This file is part of Open CASCADE Technology software library.
b311480e	4	//
d5f74e42	5	// This library is free software; you can redistribute it and/or modify it under
d5f74e42	6	// the terms of the GNU Lesser General Public License version 2.1 as published
973c2be1	7	// by the Free Software Foundation, with special exception defined in the file
	8	// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
	9	// distribution for complete text of the license and disclaimer of any warranty.
b311480e	10	//
973c2be1	11	// Alternatively, this file may be used under the terms of Open CASCADE
973c2be1	12	// commercial license or contractual agreement.
7fd59977	13
	14	#include <OSD.ixx>
	15
	16	#ifndef WNT
	17
	18	//---------- All Systems except Windows NT : ----------------------------------
	19
7fd59977	20	# include <stdio.h>
	21
	22	#include <OSD_WhoAmI.hxx>
	23	#include <OSD_SIGHUP.hxx>
	24	#include <OSD_SIGINT.hxx>
	25	#include <OSD_SIGQUIT.hxx>
	26	#include <OSD_SIGILL.hxx>
	27	#include <OSD_SIGKILL.hxx>
	28	#include <OSD_SIGBUS.hxx>
	29	#include <OSD_SIGSEGV.hxx>
	30	#include <OSD_SIGSYS.hxx>
8a262fa1	31	#include <OSD_Exception_CTRL_BREAK.hxx>
7fd59977	32	#include <Standard_NumericError.hxx>
7fd59977	33	#include <Standard_DivideByZero.hxx>
	34	#include <Standard_Overflow.hxx>
	35
	36	#include <Standard_ErrorHandler.hxx>
	37
	38	// POSIX threads
03155c18	39	#include <pthread.h>
7fd59977	40
	41	#ifdef linux
	42	#include <fenv.h>
7fd59977	43	static Standard_Boolean fFltExceptions = Standard_False;
	44	#endif
	45
8a262fa1	46	// variable signalling that Control-C has been pressed (SIGINT signal)
	47	static Standard_Boolean fCtrlBrk;
	48
7fd59977	49	//const OSD_WhoAmI Iam = OSD_WPackage;
	50
	51	typedef void (ACT_SIGIO_HANDLER)(void) ;
	52	ACT_SIGIO_HANDLER *ADR_ACT_SIGIO_HANDLER = NULL ;
	53
7fd59977	54	#ifdef DECOSF1
	55	typedef void (* SIG_PFV) (int);
	56	#endif
	57
7fd59977	58	#ifdef __GNUC__
	59	# include <stdlib.h>
	60	# include <stdio.h>
	61	#else
	62	# ifdef SA_SIGINFO
	63	# ifndef _AIX
	64	# include <sys/siginfo.h>
	65	# endif
	66	# endif
	67	#endif
	68	typedef void (* SIG_PFV) (int);
	69
03155c18	70	#include <signal.h>
03155c18	71	#include <sys/signal.h>
7fd59977	72
	73	#if defined(HAVE_PTHREAD_H) && defined(NO_CXX_EXCEPTION)
	74	//============================================================================
	75	//==== GetOldSigAction
	76	//==== get previous
	77	//============================================================================
	78
	79	static struct sigaction *GetOldSigAction()
	80	{
	81	static struct sigaction oldSignals[NSIG];
	82	return oldSignals;
	83	}
	84
	85	#ifdef SOLARIS
	86	static sigfpe_handler_type *GetOldFPE()
	87	{
	88	static sigfpe_handler_type aIEEEHandler[5] = { NULL, NULL, NULL, NULL, NULL } ;
	89	return aIEEEHandler;
	90	}
	91	#endif
	92	#endif
	93
7fd59977	94	//============================================================================
89c4bca8	95	//==== Handler
7fd59977	96	//==== Catche the differents signals:
	97	//==== 1- The Fatal signals, which cause the end of process:
	98	//==== 2- The exceptions which are "signaled" by Raise.
	99	//==== The Fatal Signals:
	100	//==== SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGKILL, SIGBUS, SIGSYS
	101	//==== The Exceptions:
	102	//==== SIGFPE
	103	//==== (SUN versions)
	104	//==== FPE_INTOVF_TRAP // ..... integer overflow
	105	//==== FPE_INTDIV_TRAP // ..... integer divide by zero
	106	//==== FPE_FLTINEX_TRAP // ..... [floating inexact result]
	107	//==== FPE_FLTDIV_TRAP // ..... [floating divide by zero]
	108	//==== FPE_FLTUND_TRAP // ..... [floating underflow]
	109	//==== FPE_FLTOPER_TRAP // ..... [floating inexact result]
	110	//==== FPE_FLTOVF_TRAP // ..... [floating overflow]
	111	//==== SIGSEGV is handled by "SegvHandler()"
	112	//============================================================================
7fd59977	113	#ifdef SA_SIGINFO
89c4bca8	114	static void Handler (const int theSignal, siginfo_t *theSigInfo, const Standard_Address theContext)
	115	#else
	116	static void Handler (const int theSignal)
7fd59977	117	#endif
7fd59977	118	{
7fd59977	119	struct sigaction oldact, act;
7fd59977	120	// re-install the signal
7fd59977	121	if ( ! sigaction (theSignal, NULL, &oldact) ) {
89c4bca8	122	// cout << " signal is " << theSignal << " handler is " << oldact.sa_handler << endl;
	123	if (sigaction (theSignal, &oldact, &act)) perror ("sigaction");
	124	}
	125	else {
	126	perror ("sigaction");
7fd59977	127	}
7fd59977	128
	129	siginfo_t * aSigInfo = NULL;
	130	#ifdef SA_SIGINFO
89c4bca8	131	aSigInfo = theSigInfo;
7fd59977	132	#endif
7fd59977	133
89c4bca8	134	#if defined(HAVE_PTHREAD_H) && defined(NO_CXX_EXCEPTION)
7fd59977	135	if (pthread_self() != getOCCThread() \|\| !Standard_ErrorHandler::IsInTryBlock()) {
7fd59977	136	// use the previous signal handler
89c4bca8	137	// cout << "OSD::Handler: signal " << (int) theSignal << " occured outside a try block " << endl ;
7fd59977	138	struct sigaction *oldSignals = GetOldSigAction();
89c4bca8	139	struct sigaction asigacthandler = oldSignals[theSignal >= 0 && theSignal < NSIG ? theSignal : 0];
89c4bca8	140
7fd59977	141	if (asigacthandler.sa_flags & SA_SIGINFO) {
	142	void (aCurInfoHandle)(int, siginfo_t , void *) = asigacthandler.sa_sigaction;
	143	if (aSigInfo) {
89c4bca8	144	switch (aSigInfo->si_signo) {
	145	case SIGFPE:
	146	{
7fd59977	147	#ifdef SOLARIS
89c4bca8	148	sigfpe_handler_type *aIEEEHandlerTab = GetOldFPE();
	149	sigfpe_handler_type aIEEEHandler = NULL;
	150	switch (aSigInfo->si_code) {
	151	case FPE_INTDIV_TRAP :
	152	case FPE_FLTDIV_TRAP :
	153	aIEEEHandler = aIEEEHandlerTab[1];
	154	break;
	155	case FPE_INTOVF_TRAP :
	156	case FPE_FLTOVF_TRAP :
	157	aIEEEHandler = aIEEEHandlerTab[2];
	158	break;
	159	case FPE_FLTUND_TRAP :
	160	aIEEEHandler = aIEEEHandlerTab[4];
	161	break;
	162	case FPE_FLTRES_TRAP :
	163	aIEEEHandler = aIEEEHandlerTab[3];
	164	break;
	165	case FPE_FLTINV_TRAP :
	166	aIEEEHandler = aIEEEHandlerTab[0];
	167	break;
	168	case FPE_FLTSUB_TRAP :
	169	default:
	170	break;
	171	}
	172	if (aIEEEHandler) {
	173	// cout << "OSD::Handler: calling previous IEEE signal handler with info" << endl ;
	174	(*aIEEEHandler) (theSignal, aSigInfo, theContext);
	175	return;
	176	}
	177	#endif
	178	break;
	179	}
	180	default:
	181	break;
	182	}
7fd59977	183	}
7fd59977	184	if (aCurInfoHandle) {
89c4bca8	185	// cout << "OSD::Handler: calling previous signal handler with info " << aCurInfoHandle << endl ;
	186	(*aCurInfoHandle) (theSignal, aSigInfo, theContext);
	187	cerr << " previous signal handler return" << endl ;
	188	return;
7fd59977	189	}
	190	else {
	191	// cout << "OSD::Handler: no handler with info for the signal" << endl;
	192	}
89c4bca8	193	}
	194	else {
	195	// no siginfo needed for the signal
7fd59977	196	void (*aCurHandler) (int) = asigacthandler.sa_handler;
7fd59977	197	if(aCurHandler) {
89c4bca8	198	// cout << "OSD::Handler: calling previous signal handler" << endl ;
	199	(*aCurHandler) (theSignal);
	200	cerr << " previous signal handler return" << endl ;
	201	return;
	202	}
7fd59977	203	}
	204	// cout << " Signal occured outside a try block, but no handler for it" <<endl;
	205	return;
	206	}
	207	#endif
	208
7fd59977	209	// cout << "OSD::Handler: signal " << (int) theSignal << " occured inside a try block " << endl ;
89c4bca8	210	if ( ADR_ACT_SIGIO_HANDLER != NULL )
89c4bca8	211	(*ADR_ACT_SIGIO_HANDLER)() ;
7fd59977	212	#ifdef linux
	213	if (fFltExceptions)
	214	feenableexcept (FE_INVALID \| FE_DIVBYZERO \| FE_OVERFLOW);
	215	//feenableexcept (FE_INVALID \| FE_DIVBYZERO);
	216	#endif
7fd59977	217	sigset_t set;
7fd59977	218	sigemptyset(&set);
89c4bca8	219	switch (theSignal) {
7fd59977	220	case SIGHUP:
	221	OSD_SIGHUP::NewInstance("SIGHUP 'hangup' detected.")->Jump();
	222	exit(SIGHUP);
	223	break;
7fd59977	224	case SIGINT:
8a262fa1	225	// For safe handling of Control-C as stop event, arm a variable but do not
	226	// generate longjump (we are out of context anyway)
	227	fCtrlBrk = Standard_True;
89c4bca8	228	// OSD_SIGINT::NewInstance("SIGINT 'interrupt' detected.")->Jump();
89c4bca8	229	// exit(SIGINT);
7fd59977	230	break;
7fd59977	231	case SIGQUIT:
	232	OSD_SIGQUIT::NewInstance("SIGQUIT 'quit' detected.")->Jump();
	233	exit(SIGQUIT);
	234	break;
7fd59977	235	case SIGILL:
	236	OSD_SIGILL::NewInstance("SIGILL 'illegal instruction' detected.")->Jump();
	237	exit(SIGILL);
	238	break;
7fd59977	239	case SIGKILL:
	240	OSD_SIGKILL::NewInstance("SIGKILL 'kill' detected.")->Jump();
	241	exit(SIGKILL);
	242	break;
7fd59977	243	case SIGBUS:
	244	sigaddset(&set, SIGBUS);
	245	sigprocmask(SIG_UNBLOCK, &set, NULL) ;
	246	OSD_SIGBUS::NewInstance("SIGBUS 'bus error' detected.")->Jump();
	247	exit(SIGBUS);
	248	break;
7fd59977	249	case SIGSEGV:
	250	OSD_SIGSEGV::NewInstance("SIGSEGV 'segmentation violation' detected.")->Jump();
	251	exit(SIGSEGV);
	252	break;
7fd59977	253	#ifdef SIGSYS
	254	case SIGSYS:
	255	OSD_SIGSYS::NewInstance("SIGSYS 'bad argument to system call' detected.")->Jump();
	256	exit(SIGSYS);
	257	break;
	258	#endif
89c4bca8	259	case SIGFPE:
7fd59977	260	sigaddset(&set, SIGFPE);
	261	sigprocmask(SIG_UNBLOCK, &set, NULL) ;
	262	#ifdef DECOSF1
89c4bca8	263	// Pour DEC/OSF1 SIGFPE = Division par zero.
89c4bca8	264	// should be clarified why in debug mode only?
7fd59977	265	#ifdef DEBUG
	266	Standard_DivideByZero::NewInstance('')->Jump;
	267	#endif
	268	break;
89c4bca8	269	#endif
7fd59977	270	#if (!defined (__sun)) && (!defined(SOLARIS))
	271	Standard_NumericError::NewInstance("SIGFPE Arithmetic exception detected")->Jump();
	272	break;
	273	#else
	274	// Reste SOLARIS
89c4bca8	275	if (aSigInfo) {
7fd59977	276	switch(aSigInfo->si_code) {
7fd59977	277	case FPE_FLTDIV_TRAP :
89c4bca8	278	Standard_DivideByZero::NewInstance("Floating Divide By Zero")->Jump();
89c4bca8	279	break;
7fd59977	280	case FPE_INTDIV_TRAP :
89c4bca8	281	Standard_DivideByZero::NewInstance("Integer Divide By Zero")->Jump();
89c4bca8	282	break;
7fd59977	283	case FPE_FLTOVF_TRAP :
89c4bca8	284	Standard_Overflow::NewInstance("Floating Overflow")->Jump();
89c4bca8	285	break;
7fd59977	286	case FPE_INTOVF_TRAP :
89c4bca8	287	Standard_Overflow::NewInstance("Integer Overflow")->Jump();
89c4bca8	288	break;
7fd59977	289	case FPE_FLTUND_TRAP :
89c4bca8	290	Standard_NumericError::NewInstance("Floating Underflow")->Jump();
89c4bca8	291	break;
7fd59977	292	case FPE_FLTRES_TRAP:
89c4bca8	293	Standard_NumericError::NewInstance("Floating Point Inexact Result")->Jump();
89c4bca8	294	break;
7fd59977	295	case FPE_FLTINV_TRAP :
89c4bca8	296	Standard_NumericError::NewInstance("Invalid Floating Point Operation")->Jump();
89c4bca8	297	break;
7fd59977	298	default:
89c4bca8	299	Standard_NumericError::NewInstance("Numeric Error")->Jump();
89c4bca8	300	break;
7fd59977	301	}
89c4bca8	302	} else {
7fd59977	303	Standard_NumericError::NewInstance("SIGFPE Arithmetic exception detected")->Jump();
	304	}
	305	#endif
	306	break;
7fd59977	307	#if defined (__sgi) \|\| defined(IRIX)
89c4bca8	308	case SIGTRAP:
7fd59977	309	sigaddset(&set, SIGTRAP);
	310	sigprocmask(SIG_UNBLOCK, &set, NULL) ;
	311	Standard_DivideByZero::NewInstance("SIGTRAP IntegerDivideByZero")->Jump(); break;
	312	#endif
	313	default:
89c4bca8	314	cout << "Unexpected signal " << theSignal << endl ;
89c4bca8	315	break;
8a262fa1	316	}
	317	}
	318
7fd59977	319	//============================================================================
89c4bca8	320	//==== SegvHandler
7fd59977	321	//============================================================================
7fd59977	322	#ifdef SA_SIGINFO
7fd59977	323
89c4bca8	324	static void SegvHandler(const int theSignal,
	325	siginfo_t *ip,
	326	const Standard_Address theContext)
7fd59977	327	{
89c4bca8	328	#ifdef NO_CXX_EXCEPTION
7fd59977	329	if (!Standard_ErrorHandler::IsInTryBlock()) {
89c4bca8	330	Handler(theSignal, ip, theContext);
7fd59977	331	return;
7fd59977	332	}
7fd59977	333	#endif
7fd59977	334	#ifdef linux
	335	if (fFltExceptions)
	336	feenableexcept (FE_INVALID \| FE_DIVBYZERO \| FE_OVERFLOW);
	337	//feenableexcept (FE_INVALID \| FE_DIVBYZERO);
	338	#endif
7fd59977	339	// cout << "OSD::SegvHandler activated(SA_SIGINFO)" << endl ;
	340	if ( ip != NULL ) {
	341	sigset_t set;
	342	sigemptyset(&set);
	343	sigaddset(&set, SIGSEGV);
	344	sigprocmask (SIG_UNBLOCK, &set, NULL) ;
89c4bca8	345	void *address = ip->si_addr ;
4d9421a9	346	{
7fd59977	347	char Msg[100];
7fd59977	348	sprintf(Msg,"SIGSEGV 'segmentation violation' detected. Address %lx",
89c4bca8	349	(long ) address ) ;
7fd59977	350	OSD_SIGSEGV::NewInstance(Msg)->Jump();
7fd59977	351	}
89c4bca8	352	}
89c4bca8	353	else {
7fd59977	354	cout << "Wrong undefined address." << endl ;
89c4bca8	355	}
7fd59977	356	exit(SIGSEGV);
	357	}
	358
89c4bca8	359	#elif defined (_hpux) \|\| defined(HPUX)
7fd59977	360	// Not ACTIVE ? SA_SIGINFO is defined on SUN, OSF, SGI and HP (and Linux) !
7fd59977	361	// pour version 09.07
89c4bca8	362
	363	static void SegvHandler(const int theSignal,
	364	siginfo_t *ip,
	365	const Standard_Address theContext)
7fd59977	366	{
	367	unsigned long Space ;
	368	unsigned long Offset ;
	369	char Msg[100] ;
	370
89c4bca8	371	if ( theContext != NULL ) {
	372	Space = ((struct sigcontext *)theContext)->sc_sl.sl_ss.ss_cr20 ;
	373	Offset = ((struct sigcontext *)theContext)->sc_sl.sl_ss.ss_cr21 ;
7fd59977	374	// cout << "Wrong address = " << hex(Offset) << endl ;
4d9421a9	375	{
89c4bca8	376	sprintf(Msg,"SIGSEGV 'segmentation violation' detected. Address %lx",Offset) ;
89c4bca8	377	OSD_SIGSEGV::Jump(Msg);
7fd59977	378	// scp->sc_pcoq_head = scp->sc_pcoq_tail ; Permettrait de continuer a
	379	// scp->sc_pcoq_tail = scp->sc_pcoq_tail + 0x4 ; l'intruction suivant le segv.
	380	}
	381	}
89c4bca8	382	else {
7fd59977	383	cout << "Wrong undefined address." << endl ;
89c4bca8	384	}
7fd59977	385	exit(SIGSEGV);
89c4bca8	386	}
	387
	388	#endif
	389
	390	//============================================================================
	391	//==== SetSignal
	392	//==== Set the differents signals:
	393	//============================================================================
	394
	395	void OSD::SetSignal(const Standard_Boolean aFloatingSignal)
	396	{
	397	static int first_time = 3 ;
	398	struct sigaction act, oact;
	399	int stat = 0;
	400
	401	if( aFloatingSignal ) {
	402	//==== Enable the floating point exceptions ===============
	403	#if defined (__sun) \|\| defined (SOLARIS)
	404	sigfpe_handler_type PHandler = (sigfpe_handler_type) Handler ;
	405	stat = ieee_handler("set", "invalid", PHandler);
	406	stat = ieee_handler("set", "division", PHandler) \|\| stat;
	407	stat = ieee_handler("set", "overflow", PHandler) \|\| stat;
	408
	409	//stat = ieee_handler("set", "underflow", PHandler) \|\| stat;
	410	//stat = ieee_handler("set", "inexact", PHandler) \|\| stat;
	411
	412	if (stat) {
	413	cerr << "ieee_handler does not work !!! KO " << endl;
	414	}
	415	#elif defined (linux)
	416	feenableexcept (FE_INVALID \| FE_DIVBYZERO \| FE_OVERFLOW);
	417	//feenableexcept (FE_INVALID \| FE_DIVBYZERO);
	418	fFltExceptions = Standard_True;
	419	#endif
	420	}
	421	else if ( first_time & 1 ) {
	422	// cout << "SetSignal( Standard_False ) is not implemented..." << endl ;
	423	first_time = first_time & (~ 1) ;
	424	}
	425
	426	#if defined (sgi) \|\| defined (IRIX )
	427	if ( first_time & 2 ) {
	428	char *TRAP_FPE = getenv("TRAP_FPE") ;
	429	if ( TRAP_FPE == NULL ) {
	430	cout << "On SGI you must set TRAP_FPE environment variable : " << endl ;
	431	cout << "set env(TRAP_FPE) \"UNDERFL=FLUSH_ZERO;OVERFL=DEFAULT;DIVZERO=DEFAULT;INT_OVERFL=DEFAULT\" or" << endl ;
	432	cout << "setenv TRAP_FPE \"UNDERFL=FLUSH_ZERO;OVERFL=DEFAULT;DIVZERO=DEFAULT;INT_OVERFL=DEFAULT\"" << endl ;
	433	// exit(1) ;
	434	first_time = first_time & (~ 2) ;
	435	}
	436	}
	437	#endif
	438
	439	//==== Save the old Signal Handler, and set the new one ===================
	440
	441	sigemptyset(&act.sa_mask) ;
	442
	443	#ifdef SA_RESTART
	444	act.sa_flags = SA_RESTART ;
	445	#else
	446	act.sa_flags = 0 ;
	447	#endif
	448	#ifdef SA_SIGINFO
	449	act.sa_flags = act.sa_flags \| SA_SIGINFO ;
450	act.sa_sigaction = /(void()(int, siginfo_t , void))*/ Handler;
451	#else
452	act.sa_handler = /(SIG_PFV)/ Handler;
453	#endif
7fd59977	454
89c4bca8	455	//==== Always detected the signal "SIGFPE" =================================
	456	stat = sigaction(SIGFPE,&act,&oact); // ...... floating point exception
	457	if (stat) {
	458	cerr << "sigaction does not work !!! KO " << endl;
	459	perror("sigaction ");
	460	}
	461
	462	//==== Detected the only the "free" signals ================================
	463	sigaction(SIGHUP,&act,&oact); // ...... hangup
	464
	465	#ifdef OBJS
	466	if(oact.sa_handler)
	467	sigaction(SIGHUP,&oact,&oact);
	468	#endif
	469
	470	sigaction(SIGINT,&act,&oact); // ...... interrupt
	471
	472	#ifdef OBJS
	473	if(oact.sa_handler)
	474	sigaction(SIGINT,&oact,&oact);
7fd59977	475	#endif
89c4bca8	476
	477	sigaction(SIGQUIT,&act,&oact); // ...... quit
	478
	479	#ifdef OBJS
	480	if(oact.sa_handler)
	481	sigaction(SIGQUIT,&oact,&oact);
	482	#endif
	483
	484	sigaction(SIGILL,&act,&oact); // ...... illegal instruction
	485
	486	#ifdef OBJS
	487	if(oact.sa_handler)
	488	sigaction(SIGILL,&oact,&oact);
	489	#endif
	490
	491	sigaction(SIGBUS,&act,&oact); // ...... bus error
	492
	493	#ifdef OBJS
	494	if(oact.sa_handler)
	495	sigaction(SIGBUS,&oact,&oact);
	496	#endif
	497
	498	#if (!defined (linux)) && (!defined(LININTEL))
	499	sigaction(SIGSYS,&act,&oact); // ...... bad argument to system call
	500
	501	# ifdef OBJS
	502	if(oact.sa_handler)
	503	sigaction(SIGSYS,&oact,&oact);
	504	# endif
	505	#endif
	506
	507	#if defined (__sgi) \|\| defined(IRIX)
	508	sigaction(SIGTRAP,&act,&oact); // Integer Divide By Zero (IRIX)
	509
	510	# ifdef OBJS
	511	if(oact.sa_handler)
	512	sigaction(SIGTRAP,&oact,&oact);
	513	# endif
	514	#endif
	515
	516	#ifdef SA_SIGINFO
	517	act.sa_sigaction = /(void()(int, siginfo_t , void))*/ SegvHandler;
7fd59977	518	#else
89c4bca8	519	act.sa_handler = /(SIG_PFV)/ SegvHandler;
89c4bca8	520	#endif
7fd59977	521
89c4bca8	522	if ( sigaction( SIGSEGV , &act , &oact ) ) // ...... segmentation violation
89c4bca8	523	perror("OSD::SetSignal sigaction( SIGSEGV , &act , &oact ) ") ;
7fd59977	524
89c4bca8	525	#ifdef OBJS
	526	if(oact.sa_handler)
	527	sigaction(SIGSEGV,&oact,&oact);
	528	#endif
	529	#if defined(__osf__) \|\| defined(DECOSF1)
	530	struct sigaction action, prev_action;
	531	action.sa_handler = SIG_IGN;
	532	action.sa_mask = 0;
	533	action.sa_flags = 0;
	534
	535	if (sigaction (SIGFPE, &action, &prev_action) == -1) {
	536	perror ("sigaction");
	537	exit (1);
	538	}
7fd59977	539	#endif
89c4bca8	540
	541	}
	542
	543	//============================================================================
	544	//==== ControlBreak
	545	//============================================================================
	546
	547	void OSD :: ControlBreak ()
	548	{
	549	if ( fCtrlBrk ) {
	550	fCtrlBrk = Standard_False;
	551	OSD_Exception_CTRL_BREAK::Raise ("* INTERRUPT *");
	552	}
	553	}
	554
7fd59977	555	#endif