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
   5  * License as published by the Free Software Foundation; either
   6  * version 2.1 of the License, or (at your option) any later version.
   7  *
   8  * This library 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 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 02110-1301 USA
  16  */
  17
  18
  19 \f
  20 #ifdef HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #include "libguile/_scm.h"
  25 #include "libguile/ports.h"
  26 #include "libguile/root.h"
  27 #include "libguile/threads.h"
  28
  29 #include "libguile/stackchk.h"
  30 \f
  31
  32 /* {Stack Checking}
  33  */
  34
  35 #ifdef STACK_CHECKING
  36 int scm_stack_checking_enabled_p;
  37
  38 SCM_SYMBOL (scm_stack_overflow_key, "stack-overflow");
  39
  40 void
  41 scm_report_stack_overflow ()
  42 {
  43   scm_stack_checking_enabled_p = 0;
  44   scm_error (scm_stack_overflow_key,
  45              NULL,
  46              "Stack overflow",
  47              SCM_BOOL_F,
  48              SCM_BOOL_F);
  49 }
  50
  51 #endif
  52
  53 long
  54 scm_stack_size (SCM_STACKITEM *start)
  55 {
  56   SCM_STACKITEM stack;
  57 #if SCM_STACK_GROWS_UP
  58   return &stack - start;
  59 #else
  60   return start - &stack;
  61 #endif /* SCM_STACK_GROWS_UP */
  62 }
  63
  64
  65 void
  66 scm_stack_report ()
  67 {
  68   SCM port = scm_current_error_port ();
  69   SCM_STACKITEM stack;
  70   scm_i_thread *thread = SCM_I_CURRENT_THREAD;
  71
  72   scm_uintprint ((scm_stack_size (thread->continuation_base)
  73                   * sizeof (SCM_STACKITEM)),
  74                  16, port);
  75   scm_puts (" of stack: 0x", port);
  76   scm_uintprint ((scm_t_bits) thread->continuation_base, 16, port);
  77   scm_puts (" - 0x", port);
  78   scm_uintprint ((scm_t_bits) &stack, 16, port);
  79   scm_puts ("\n", port);
  80 }
  81
  82
  83 SCM_DEFINE (scm_sys_get_stack_size, "%get-stack-size", 0, 0, 0,
  84             (),
  85             "Return the current thread's C stack size (in Scheme objects).")
  86 #define FUNC_NAME s_scm_sys_get_stack_size
  87 {
  88   return scm_from_long (scm_stack_size (SCM_I_CURRENT_THREAD->base));
  89 }
  90 #undef FUNC_NAME
  91
  92
  93 void
  94 scm_init_stackchk ()
  95 {
  96 #include "libguile/stackchk.x"
  97 }
  98
  99 /*
 100   Local Variables:
 101   c-file-style: "gnu"
 102   End:
 103 */