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scm_report_stack_overflow eventually resets scm_stack_checking_enabled_p

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* libguile/stackchk.c (scm_report_stack_overflow): Surround in a
  dynwind, so that scm_stack_checking_enabled_p is reset when the error
  throws.
This commit is contained in:
Andy Wingo 2010-10-01 16:36:34 +02:00
parent d0110327ab
commit 138bf22d82
1 changed files with 17 additions and 1 deletions
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18
libguile/stackchk.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1995,1996,1997, 2000, 2001, 2006, 2008 Free Software Foundation, Inc.
/* Copyright (C) 1995,1996,1997, 2000, 2001, 2006, 2008, 2010 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
@ -26,6 +26,7 @@
#include "libguile/ports.h"
#include "libguile/root.h"
#include "libguile/threads.h"
#include "libguile/dynwind.h"
#include "libguile/stackchk.h"
@ -38,15 +39,30 @@ int scm_stack_checking_enabled_p;
SCM_SYMBOL (scm_stack_overflow_key, "stack-overflow");
static void
reset_scm_stack_checking_enabled_p (void *arg)
{
scm_stack_checking_enabled_p = (int)(scm_t_bits)arg;
}
void
scm_report_stack_overflow ()
{
scm_dynwind_begin (0); /* non-rewindable frame */
scm_dynwind_unwind_handler (reset_scm_stack_checking_enabled_p,
(void*)(scm_t_bits)scm_stack_checking_enabled_p,
SCM_F_WIND_EXPLICITLY);
scm_stack_checking_enabled_p = 0;
scm_error (scm_stack_overflow_key,
NULL,
"Stack overflow",
SCM_BOOL_F,
SCM_BOOL_F);
/* not reached */
scm_dynwind_end ();
}
#endif