5 /* Copyright (C) 1995,1996 Free Software Foundation, Inc.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this software; see the file COPYING. If not, write to
19 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
21 * As a special exception, the Free Software Foundation gives permission
22 * for additional uses of the text contained in its release of GUILE.
24 * The exception is that, if you link the GUILE library with other files
25 * to produce an executable, this does not by itself cause the
26 * resulting executable to be covered by the GNU General Public License.
27 * Your use of that executable is in no way restricted on account of
28 * linking the GUILE library code into it.
30 * This exception does not however invalidate any other reasons why
31 * the executable file might be covered by the GNU General Public License.
33 * This exception applies only to the code released by the
34 * Free Software Foundation under the name GUILE. If you copy
35 * code from other Free Software Foundation releases into a copy of
36 * GUILE, as the General Public License permits, the exception does
37 * not apply to the code that you add in this way. To avoid misleading
38 * anyone as to the status of such modified files, you must delete
39 * this exception notice from them.
41 * If you write modifications of your own for GUILE, it is your choice
42 * whether to permit this exception to apply to your modifications.
43 * If you do not wish that, delete this exception notice.
46 #include "libguile/__scm.h"
48 #include "libguile/continuations.h"
49 #ifdef DEBUG_EXTENSIONS
50 #include "libguile/debug.h"
54 /* With debug extensions we have the possibility to use the debug options
55 * to disable stack checking.
57 #ifdef DEBUG_EXTENSIONS
58 #define SCM_STACK_CHECKING_P SCM_STACK_LIMIT
60 /* *fixme* This option should be settable also without debug extensions. */
61 #define SCM_STACK_LIMIT 100000
62 #define SCM_STACK_CHECKING_P 1
66 # ifdef SCM_STACK_GROWS_UP
67 # define SCM_STACK_OVERFLOW_P(s)\
68 (s - SCM_BASE (scm_rootcont) > SCM_STACK_LIMIT * sizeof (SCM_STACKITEM))
70 # define SCM_STACK_OVERFLOW_P(s)\
71 (SCM_BASE (scm_rootcont) - s > SCM_STACK_LIMIT * sizeof (SCM_STACKITEM))
73 # define SCM_CHECK_STACK\
76 if (SCM_STACK_OVERFLOW_P (&stack) && scm_stack_checking_enabled_p)\
77 scm_report_stack_overflow ();\
80 # define SCM_CHECK_STACK /**/
81 #endif /* STACK_CHECKING */
83 extern int scm_stack_checking_enabled_p
;
87 extern void scm_report_stack_overflow (void);
88 extern long scm_stack_size (SCM_STACKITEM
*start
);
89 extern void scm_stack_report (void);
90 extern void scm_init_stackchk (void);
93 extern void scm_report_stack_overflow ();
94 extern long scm_stack_size ();
95 extern void scm_stack_report ();
96 extern void scm_init_stackchk ();
107 #endif /* STACKCHKH */