Gabriele Cosmo
271 lines
8.5 KiB
C++
271 lines
8.5 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id$
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//
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//
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// -*- C++ -*-
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//
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// -----------------------------------------------------------------------
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// This global method should be used on LINUX or MacOSX platforms with gcc
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// compiler for activating NaN detection and FPE signals, and forcing
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// abortion of the application at the time these are detected.
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// Meant to be used for debug purposes, can be activated by compiling the
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// "run" module with the flag G4FPE_DEBUG set in the environment.
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// -----------------------------------------------------------------------
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#ifndef G4FPEDetection_h
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#define G4FPEDetection_h 1
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#include <iostream>
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#include <stdlib.h> /* abort(), exit() */
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#ifdef __linux__
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#ifdef __GNUC__
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#include <features.h>
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#include <fenv.h>
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#include <csignal>
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struct sigaction termaction, oldaction;
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static void TerminationSignalHandler(int sig, siginfo_t* sinfo, void* /* context */)
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{
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std::cerr << "ERROR: " << sig;
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std::string message = "Floating-point exception (FPE).";
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if (sinfo) {
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switch (sinfo->si_code) {
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#ifdef FPE_NOOP /* BUG: MacOSX uses this instead of INTDIV */
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case FPE_NOOP:
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#endif
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case FPE_INTDIV:
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message = "Integer divide by zero.";
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break;
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case FPE_INTOVF:
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message = "Integer overflow.";
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break;
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case FPE_FLTDIV:
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message = "Floating point divide by zero.";
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break;
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case FPE_FLTOVF:
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message = "Floating point overflow.";
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break;
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case FPE_FLTUND:
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message = "Floating point underflow.";
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break;
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case FPE_FLTRES:
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message = "Floating point inexact result.";
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break;
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case FPE_FLTINV:
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message = "Floating point invalid operation.";
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break;
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case FPE_FLTSUB:
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message = "Subscript out of range.";
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break;
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default:
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message = "Unknown error.";
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break;
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}
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}
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std::cerr << " - " << message << std::endl;
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::abort();
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}
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static void InvalidOperationDetection()
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{
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std::cout << std::endl
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<< " "
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<< "############################################" << std::endl
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<< " "
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<< "!!! WARNING - FPE detection is activated !!!" << std::endl
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<< " "
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<< "############################################" << std::endl;
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(void) feenableexcept( FE_DIVBYZERO );
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(void) feenableexcept( FE_INVALID );
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//(void) feenableexcept( FE_OVERFLOW );
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//(void) feenableexcept( FE_UNDERFLOW );
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sigdelset(&termaction.sa_mask,SIGFPE);
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termaction.sa_sigaction=TerminationSignalHandler;
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termaction.sa_flags=SA_SIGINFO;
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sigaction(SIGFPE, &termaction, &oldaction);
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}
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#endif
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#elif __MACH__ /* MacOSX */
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#include <fenv.h>
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#include <signal.h>
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#define DEFINED_PPC (defined(__ppc__) || defined(__ppc64__))
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#define DEFINED_INTEL (defined(__i386__) || defined(__x86_64__))
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#if DEFINED_PPC
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#define FE_EXCEPT_SHIFT 22 // shift flags right to get masks
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#define FM_ALL_EXCEPT FE_ALL_EXCEPT >> FE_EXCEPT_SHIFT
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static inline int feenableexcept (unsigned int excepts)
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{
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static fenv_t fenv;
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unsigned int new_excepts = (excepts & FE_ALL_EXCEPT) >> FE_EXCEPT_SHIFT,
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old_excepts; // all previous masks
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if ( fegetenv (&fenv) ) { return -1; }
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old_excepts = (fenv & FM_ALL_EXCEPT) << FE_EXCEPT_SHIFT;
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fenv = (fenv & ~new_excepts) | new_excepts;
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return ( fesetenv (&fenv) ? -1 : old_excepts );
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}
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static inline int fedisableexcept (unsigned int excepts)
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{
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static fenv_t fenv;
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unsigned int still_on = ~((excepts & FE_ALL_EXCEPT) >> FE_EXCEPT_SHIFT),
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old_excepts; // previous masks
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if ( fegetenv (&fenv) ) { return -1; }
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old_excepts = (fenv & FM_ALL_EXCEPT) << FE_EXCEPT_SHIFT;
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fenv &= still_on;
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return ( fesetenv (&fenv) ? -1 : old_excepts );
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}
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#elif DEFINED_INTEL
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static inline int feenableexcept (unsigned int excepts)
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{
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static fenv_t fenv;
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unsigned int new_excepts = excepts & FE_ALL_EXCEPT,
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old_excepts; // previous masks
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if ( fegetenv (&fenv) ) { return -1; }
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old_excepts = fenv.__control & FE_ALL_EXCEPT;
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// unmask
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//
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fenv.__control &= ~new_excepts;
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fenv.__mxcsr &= ~(new_excepts << 7);
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return ( fesetenv (&fenv) ? -1 : old_excepts );
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}
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static inline int fedisableexcept (unsigned int excepts)
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{
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static fenv_t fenv;
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unsigned int new_excepts = excepts & FE_ALL_EXCEPT,
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old_excepts; // all previous masks
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if ( fegetenv (&fenv) ) { return -1; }
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old_excepts = fenv.__control & FE_ALL_EXCEPT;
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// mask
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//
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fenv.__control |= new_excepts;
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fenv.__mxcsr |= new_excepts << 7;
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return ( fesetenv (&fenv) ? -1 : old_excepts );
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}
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#endif /* PPC or INTEL enabling */
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static void TerminationSignalHandler(int sig, siginfo_t* sinfo, void* /* context */)
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{
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std::cerr << "ERROR: " << sig;
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std::string message = "Floating-point exception (FPE).";
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if (sinfo) {
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switch (sinfo->si_code) {
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#ifdef FPE_NOOP /* BUG: MacOSX uses this instead of INTDIV */
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case FPE_NOOP:
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#endif
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case FPE_INTDIV:
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message = "Integer divide by zero.";
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break;
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case FPE_INTOVF:
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message = "Integer overflow.";
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break;
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case FPE_FLTDIV:
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message = "Floating point divide by zero.";
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break;
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case FPE_FLTOVF:
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message = "Floating point overflow.";
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break;
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case FPE_FLTUND:
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message = "Floating point underflow.";
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break;
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case FPE_FLTRES:
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message = "Floating point inexact result.";
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break;
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case FPE_FLTINV:
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message = "Floating point invalid operation.";
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break;
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case FPE_FLTSUB:
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message = "Subscript out of range.";
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break;
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default:
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message = "Unknown error.";
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break;
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}
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}
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std::cerr << " - " << message << std::endl;
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::abort();
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}
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static void InvalidOperationDetection()
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{
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struct sigaction termaction, oldaction;
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std::cout << std::endl
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<< " "
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<< "############################################" << std::endl
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<< " "
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<< "!!! WARNING - FPE detection is activated !!!" << std::endl
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<< " "
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<< "############################################" << std::endl;
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feenableexcept ( FE_DIVBYZERO );
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feenableexcept ( FE_INVALID );
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// fedisableexcept( FE_OVERFLOW );
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// fedisableexcept( FE_UNDERFLOW );
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sigdelset(&termaction.sa_mask,SIGFPE);
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termaction.sa_sigaction=TerminationSignalHandler;
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termaction.sa_flags=SA_SIGINFO;
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sigaction(SIGFPE, &termaction, &oldaction);
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}
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#else /* Not Linux, nor MacOSX ... */
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static void InvalidOperationDetection() {;}
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#endif
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#endif
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