libguile/stackchk.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_STACKCHK_H
   4 #define SCM_STACKCHK_H
   5
   6 /* Copyright (C) 1995,1996,1998,2000 Free Software Foundation, Inc.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  */
  22
  23 \f
  24
  25 #include "libguile/__scm.h"
  26
  27 #include "libguile/continuations.h"
  28 #ifdef DEBUG_EXTENSIONS
  29 #include "libguile/debug.h"
  30 #endif
  31 \f
  32
  33 /* With debug extensions we have the possibility to use the debug options
  34  * to disable stack checking.
  35  */
  36 #ifdef DEBUG_EXTENSIONS
  37 #define SCM_STACK_CHECKING_P SCM_STACK_LIMIT
  38 #else
  39 /* *fixme* This option should be settable also without debug extensions. */
  40 #define SCM_STACK_LIMIT 100000
  41 #define SCM_STACK_CHECKING_P 1
  42 #endif
  43
  44 #ifdef STACK_CHECKING
  45 # if SCM_STACK_GROWS_UP
  46 #  define SCM_STACK_OVERFLOW_P(s)\
  47    (s > ((SCM_STACKITEM *) SCM_BASE (scm_rootcont) + SCM_STACK_LIMIT))
  48 # else
  49 #  define SCM_STACK_OVERFLOW_P(s)\
  50    (s < ((SCM_STACKITEM *) SCM_BASE (scm_rootcont) - SCM_STACK_LIMIT))
  51 # endif
  52 # define SCM_CHECK_STACK\
  53     {\
  54        SCM_STACKITEM stack;\
  55        if (SCM_STACK_OVERFLOW_P (&stack) && scm_stack_checking_enabled_p)\
  56          scm_report_stack_overflow ();\
  57     }
  58 #else
  59 # define SCM_CHECK_STACK /**/
  60 #endif /* STACK_CHECKING */
  61
  62 SCM_API int scm_stack_checking_enabled_p;
  63
  64 \f
  65
  66 SCM_API void scm_report_stack_overflow (void);
  67 SCM_API long scm_stack_size (SCM_STACKITEM *start);
  68 SCM_API void scm_stack_report (void);
  69 SCM_API void scm_init_stackchk (void);
  70
  71 #endif  /* SCM_STACKCHK_H */
  72
  73 /*
  74   Local Variables:
  75   c-file-style: "gnu"
  76   End:
  77 */