libguile/stackchk.c

   1 /*      Copyright (C) 1995,1996 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, 675 Mass Ave, Cambridge, MA 02139, USA.
  16  *
  17  * As a special exception, the Free Software Foundation gives permission
  18  * for additional uses of the text contained in its release of GUILE.
  19  *
  20  * The exception is that, if you link the GUILE library with other files
  21  * to produce an executable, this does not by itself cause the
  22  * resulting executable to be covered by the GNU General Public License.
  23  * Your use of that executable is in no way restricted on account of
  24  * linking the GUILE library code into it.
  25  *
  26  * This exception does not however invalidate any other reasons why
  27  * the executable file might be covered by the GNU General Public License.
  28  *
  29  * This exception applies only to the code released by the
  30  * Free Software Foundation under the name GUILE.  If you copy
  31  * code from other Free Software Foundation releases into a copy of
  32  * GUILE, as the General Public License permits, the exception does
  33  * not apply to the code that you add in this way.  To avoid misleading
  34  * anyone as to the status of such modified files, you must delete
  35  * this exception notice from them.
  36  *
  37  * If you write modifications of your own for GUILE, it is your choice
  38  * whether to permit this exception to apply to your modifications.
  39  * If you do not wish that, delete this exception notice.
  40  */
  41 \f
  42
  43 #include <stdio.h>
  44 #include "_scm.h"
  45 #include "genio.h"
  46
  47 #include "stackchk.h"
  48 \f
  49
  50 /* {Stack Checking}
  51  */
  52
  53 #ifdef STACK_CHECKING
  54 int scm_stack_checking_enabled_p;
  55
  56 SCM_SYMBOL (scm_stack_overflow_key, "stack-overflow");
  57
  58 void
  59 scm_report_stack_overflow ()
  60 {
  61   scm_stack_checking_enabled_p = 0;
  62   scm_error (scm_stack_overflow_key,
  63              NULL,
  64              "Stack overflow",
  65              SCM_BOOL_F,
  66              SCM_BOOL_F);
  67 }
  68
  69 #endif
  70
  71 long
  72 scm_stack_size (start)
  73      SCM_STACKITEM *start;
  74 {
  75   SCM_STACKITEM stack;
  76 #ifdef SCM_STACK_GROWS_UP
  77   return &stack - start;
  78 #else
  79   return start - &stack;
  80 #endif /* def SCM_STACK_GROWS_UP */
  81 }
  82
  83
  84 void
  85 scm_stack_report ()
  86 {
  87   SCM_STACKITEM stack;
  88   scm_intprint (scm_stack_size (SCM_BASE (scm_rootcont)) * sizeof (SCM_STACKITEM),
  89                 16, scm_cur_errp);
  90   scm_gen_puts (scm_regular_string, " of stack: 0x", scm_cur_errp);
  91   scm_intprint ((long) SCM_BASE (scm_rootcont), 16, scm_cur_errp);
  92   scm_gen_puts (scm_regular_string, " - 0x", scm_cur_errp);
  93   scm_intprint ((long) &stack, 16, scm_cur_errp);
  94   scm_gen_puts (scm_regular_string, "\n", scm_cur_errp);
  95 }
  96
  97
  98
  99
 100 void
 101 scm_init_stackchk ()
 102 {
 103 #include "stackchk.x"
 104 }