libguile/stackchk.c

   1 /*      Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  17  *
  18  * As a special exception, the Free Software Foundation gives permission
  19  * for additional uses of the text contained in its release of GUILE.
  20  *
  21  * The exception is that, if you link the GUILE library with other files
  22  * to produce an executable, this does not by itself cause the
  23  * resulting executable to be covered by the GNU General Public License.
  24  * Your use of that executable is in no way restricted on account of
  25  * linking the GUILE library code into it.
  26  *
  27  * This exception does not however invalidate any other reasons why
  28  * the executable file might be covered by the GNU General Public License.
  29  *
  30  * This exception applies only to the code released by the
  31  * Free Software Foundation under the name GUILE.  If you copy
  32  * code from other Free Software Foundation releases into a copy of
  33  * GUILE, as the General Public License permits, the exception does
  34  * not apply to the code that you add in this way.  To avoid misleading
  35  * anyone as to the status of such modified files, you must delete
  36  * this exception notice from them.
  37  *
  38  * If you write modifications of your own for GUILE, it is your choice
  39  * whether to permit this exception to apply to your modifications.
  40  * If you do not wish that, delete this exception notice.  */
  41
  42 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
  43    gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
  44
  45 \f
  46
  47 #include <stdio.h>
  48 #include "libguile/_scm.h"
  49 #include "libguile/ports.h"
  50 #include "libguile/root.h"
  51
  52 #include "libguile/stackchk.h"
  53 \f
  54
  55 /* {Stack Checking}
  56  */
  57
  58 #ifdef STACK_CHECKING
  59 int scm_stack_checking_enabled_p;
  60
  61 SCM_SYMBOL (scm_stack_overflow_key, "stack-overflow");
  62
  63 void
  64 scm_report_stack_overflow ()
  65 {
  66   scm_stack_checking_enabled_p = 0;
  67   scm_error (scm_stack_overflow_key,
  68              NULL,
  69              "Stack overflow",
  70              SCM_BOOL_F,
  71              SCM_BOOL_F);
  72 }
  73
  74 #endif
  75
  76 long
  77 scm_stack_size (SCM_STACKITEM *start)
  78 {
  79   SCM_STACKITEM stack;
  80 #ifdef SCM_STACK_GROWS_UP
  81   return &stack - start;
  82 #else
  83   return start - &stack;
  84 #endif /* def SCM_STACK_GROWS_UP */
  85 }
  86
  87
  88 void
  89 scm_stack_report ()
  90 {
  91   SCM_STACKITEM stack;
  92   scm_intprint (scm_stack_size (SCM_BASE (scm_rootcont)) * sizeof (SCM_STACKITEM),
  93                 16, scm_cur_errp);
  94   scm_puts (" of stack: 0x", scm_cur_errp);
  95   scm_intprint ((long) SCM_BASE (scm_rootcont), 16, scm_cur_errp);
  96   scm_puts (" - 0x", scm_cur_errp);
  97   scm_intprint ((long) &stack, 16, scm_cur_errp);
  98   scm_puts ("\n", scm_cur_errp);
  99 }
 100
 101
 102
 103
 104 void
 105 scm_init_stackchk ()
 106 {
 107 #include "libguile/stackchk.x"
 108 }
 109
 110 /*
 111   Local Variables:
 112   c-file-style: "gnu"
 113   End:
 114 */