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00001 /*---------------------------------------------------------------------------*\ 00002 ========= | 00003 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox 00004 \\ / O peration | 00005 \\ / A nd | Copyright (C) 1991-2005 OpenCFD Ltd. 00006 \\/ M anipulation | 00007 ------------------------------------------------------------------------------- 00008 License 00009 This file is part of OpenFOAM. 00010 00011 OpenFOAM is free software; you can redistribute it and/or modify it 00012 under the terms of the GNU General Public License as published by the 00013 Free Software Foundation; either version 2 of the License, or (at your 00014 option) any later version. 00015 00016 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT 00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00018 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 00019 for more details. 00020 00021 You should have received a copy of the GNU General Public License 00022 along with OpenFOAM; if not, write to the Free Software Foundation, 00023 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00024 00025 Class 00026 sigFpe 00027 00028 Description 00029 Sets up trapping for floating point exceptions (sigfpe). 00030 00031 Controlled by two env vars: 00032 FOAM_SIGFPE : exception trapping 00033 FOAM_SETNAN : initialization of all malloced memory to NaN. If also 00034 FOAM_SIGFPE set this will cause usage of uninitialized scalars 00035 to trigger an abort. 00036 00037 SourceFiles 00038 sigFpe.C 00039 00040 \*---------------------------------------------------------------------------*/ 00041 00042 #ifndef sigFpe_H 00043 #define sigFpe_H 00044 00045 #include "OSspecific.H" 00046 #include <signal.h> 00047 00048 #if defined(linux) || defined(linuxAMD64) || defined(linuxIA64) 00049 # define LINUX 00050 #endif 00051 00052 #if defined(LINUX) && defined(__GNUC__) 00053 # define LINUX_GNUC 00054 #endif 00055 00056 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00057 00058 namespace Foam 00059 { 00060 00061 /*---------------------------------------------------------------------------*\ 00062 Class sigFpe Declaration 00063 \*---------------------------------------------------------------------------*/ 00064 00065 class sigFpe 00066 { 00067 // Private data 00068 00069 //- Saved old signal trapping setting 00070 static struct sigaction oldAction_; 00071 00072 # ifdef LINUX 00073 00074 //- Saved old malloc 00075 static void *(*old_malloc_hook)(size_t, const void *); 00076 00077 //- nan malloc function. From malloc_hook manpage. 00078 static void* my_malloc_hook(size_t size, const void *caller); 00079 00080 # endif 00081 00082 00083 // Static data members 00084 00085 # ifdef LINUX_GNUC 00086 00087 //- Handler for caught signals 00088 static void sigFpeHandler(int); 00089 00090 # endif 00091 00092 00093 public: 00094 00095 00096 // Constructors 00097 00098 sigFpe(); 00099 00100 00101 // Destructor 00102 00103 ~sigFpe(); 00104 00105 00106 // Member functions 00107 00108 void set(); 00109 }; 00110 00111 00112 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00113 00114 } // End namespace Foam 00115 00116 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 00117 00118 #endif 00119 00120 // ************************************************************************* //