libguile/stackchk.c

   1 /*      Copyright (C) 1995,1996,1997, 2000, 2001, 2006, 2008 Free Software Foundation, Inc.
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public License
   5  * as published by the Free Software Foundation; either version 3 of
   6  * the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  16  * 02110-1301 USA
  17  */
  18
  19
  20 \f
  21 #ifdef HAVE_CONFIG_H
  22 # include <config.h>
  23 #endif
  24
  25 #include "libguile/_scm.h"
  26 #include "libguile/ports.h"
  27 #include "libguile/root.h"
  28 #include "libguile/threads.h"
  29
  30 #include "libguile/stackchk.h"
  31 \f
  32
  33 /* {Stack Checking}
  34  */
  35
  36 #ifdef STACK_CHECKING
  37 int scm_stack_checking_enabled_p;
  38
  39 SCM_SYMBOL (scm_stack_overflow_key, "stack-overflow");
  40
  41 void
  42 scm_report_stack_overflow ()
  43 {
  44   scm_stack_checking_enabled_p = 0;
  45   scm_error (scm_stack_overflow_key,
  46              NULL,
  47              "Stack overflow",
  48              SCM_BOOL_F,
  49              SCM_BOOL_F);
  50 }
  51
  52 #endif
  53
  54 long
  55 scm_stack_size (SCM_STACKITEM *start)
  56 {
  57   SCM_STACKITEM stack;
  58 #if SCM_STACK_GROWS_UP
  59   return &stack - start;
  60 #else
  61   return start - &stack;
  62 #endif /* SCM_STACK_GROWS_UP */
  63 }
  64
  65
  66 void
  67 scm_stack_report ()
  68 {
  69   SCM port = scm_current_error_port ();
  70   SCM_STACKITEM stack;
  71   scm_i_thread *thread = SCM_I_CURRENT_THREAD;
  72
  73   scm_uintprint ((scm_stack_size (thread->continuation_base)
  74                   * sizeof (SCM_STACKITEM)),
  75                  16, port);
  76   scm_puts (" of stack: 0x", port);
  77   scm_uintprint ((scm_t_bits) thread->continuation_base, 16, port);
  78   scm_puts (" - 0x", port);
  79   scm_uintprint ((scm_t_bits) &stack, 16, port);
  80   scm_puts ("\n", port);
  81 }
  82
  83
  84 SCM_DEFINE (scm_sys_get_stack_size, "%get-stack-size", 0, 0, 0,
  85             (),
  86             "Return the current thread's C stack size (in Scheme objects).")
  87 #define FUNC_NAME s_scm_sys_get_stack_size
  88 {
  89   return scm_from_long (scm_stack_size (SCM_I_CURRENT_THREAD->base));
  90 }
  91 #undef FUNC_NAME
  92
  93
  94 void
  95 scm_init_stackchk ()
  96 {
  97 #include "libguile/stackchk.x"
  98 }
  99
 100 /*
 101   Local Variables:
 102   c-file-style: "gnu"
 103   End:
 104 */