src/ptlib/unix/assert.cxx

   1 /*
   2  * assert.cxx
   3  *
   4  * Assert function implementation.
   5  *
   6  * Portable Windows Library
   7  *
   8  * Copyright (c) 1993-1998 Equivalence Pty. Ltd.
   9  *
  10  * The contents of this file are subject to the Mozilla Public License
  11  * Version 1.0 (the "License"); you may not use this file except in
  12  * compliance with the License. You may obtain a copy of the License at
  13  * http://www.mozilla.org/MPL/
  14  *
  15  * Software distributed under the License is distributed on an "AS IS"
  16  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  17  * the License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * The Original Code is Portable Windows Library.
  21  *
  22  * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
  23  *
  24  * Portions are Copyright (C) 1993 Free Software Foundation, Inc.
  25  * All Rights Reserved.
  26  *
  27  * Contributor(s): ______________________________________.
  28  *
  29  * $Log$
  30  * Revision 1.16  2002/06/25 04:05:19  robertj
  31  * Fixed new assert function that does not have file/line parameters.
  32  *
  33  * Revision 1.15  2002/06/25 02:26:05  robertj
  34  * Improved assertion system to allow C++ class name to be displayed if
  35  *   desired, especially relevant to container classes.
  36  *
  37  * Revision 1.14  2001/09/03 08:13:54  robertj
  38  * Changed "stack dump" option to "run debugger" when get assert.
  39  *
  40  * Revision 1.13  2001/08/30 08:58:09  robertj
  41  * Added explicit output to trace file if get assert.
  42  *
  43  * Revision 1.12  2001/07/03 04:41:25  yurik
  44  * Corrections to Jac's submission from 6/28
  45  *
  46  * Revision 1.11  2001/06/30 06:59:07  yurik
  47  * Jac Goudsmit from Be submit these changes 6/28. Implemented by Yuri Kiryanov
  48  *
  49  * Revision 1.10  2001/05/03 01:14:09  robertj
  50  * Put in check to ignore assert if stdin not TTY or not open.
  51  * Changed default action on assert to ignore if get EOF.
  52  *
  53  * Revision 1.9  2001/04/20 10:13:02  robertj
  54  * Made sure cannot have nested asserts.
  55  *
  56  * Revision 1.8  2000/03/27 18:20:09  craigs
  57  * Added the ability to get a stack dump on assert
  58  *
  59  * Revision 1.7  2000/03/21 03:09:54  craigs
  60  * Fixed the fix with EOF
  61  *
  62  * Revision 1.6  2000/03/20 22:59:18  craigs
  63  * Fixed problem with asserts generating unlimited output when input is redirected
  64  *
  65  * Revision 1.5  2000/02/18 01:49:18  craigs
  66  * Added VxWorks code
  67  *
  68  * Revision 1.4  1999/06/23 14:19:46  robertj
  69  * Fixed core dump problem with SIGINT/SIGTERM terminating process.
  70  *
  71  * Revision 1.3  1998/09/24 04:12:08  robertj
  72  * Added open software license.
  73  *
  74  * Revision 1.2  1998/06/17 14:47:47  robertj
  75  * Fixed continuous display of assert if input is from /dev/null
  76  *
  77  * Revision 1.1  1996/01/26 11:09:15  craigs
  78  * Initial revision
  79  *
  80  */
  81
  82 #include <ptlib.h>
  83
  84 #include <ctype.h>
  85 #include <signal.h>
  86
  87 void PAssertFunc(const char * msg)
  88
  89 {
  90 #ifdef __BEOS__
  91   // Print location in Eddie-compatible format
  92   PError << msg << endl;
  93   // Pop up the debugger dialog that gives the user the necessary choices
  94   // "Ignore" is not supported on BeOS but you can instruct the
  95   // debugger to continue executing.
  96   // Note: if you choose "debug" you get a debug prompt. Type bdb to
  97   // start the Be Debugger.
  98   debugger(msg);
  99 #else
 100   static BOOL inAssert;
 101   if (inAssert)
 102     return;
 103   inAssert = TRUE;
 104
 105   ostream & trace = PTrace::Begin(0, __FILE__, __LINE__);
 106   trace << "PWLib\t" << msg << PTrace::End;
 107
 108   if (&trace != &PError)
 109     PError << msg << endl;
 110
 111 #ifndef P_VXWORKS
 112
 113   // Check for if stdin is not a TTY and just ignore the assert if so.
 114   if (!isatty(STDIN_FILENO)) {
 115     inAssert = FALSE;
 116     return;
 117   }
 118
 119   for(;;) {
 120     PError << "\n<A>bort, <C>ore dump, <I>gnore"
 121 #ifdef _DEBUG
 122            << ", <D>ebug"
 123 #endif
 124            << "? " << flush;
 125     int c = getchar();
 126
 127     switch (c) {
 128       case 'a' :
 129       case 'A' :
 130         PError << "\nAborting.\n";
 131         _exit(1);
 132
 133 #ifdef _DEBUG
 134       case 'd' :
 135       case 'D' :
 136         {
 137           PString cmd = "gdb " + PProcess::Current().GetFile();
 138           cmd.sprintf(" %d", getpid());
 139           system((const char *)cmd);
 140         }
 141         break;
 142 #endif
 143
 144       case 'c' :
 145       case 'C' :
 146         PError << "\nDumping core.\n";
 147         kill(getpid(), SIGABRT);
 148
 149       case 'i' :
 150       case 'I' :
 151       case EOF :
 152         PError << "\nIgnoring.\n";
 153         inAssert = FALSE;
 154         return;
 155     }
 156   }
 157
 158 #else // P_VXWORKS
 159
 160   exit(1);
 161   kill(taskIdSelf(), SIGABRT);
 162
 163 #endif // P_VXWORKS
 164 #endif // __BEOS__
 165 }
 166
 167 // End Of File ///////////////////////////////////////////////////////////////