1 /* Debugging extensions for Guile
2 * Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002, 2003, 2006, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public License
6 * as published by the Free Software Foundation; either version 3 of
7 * the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
27 #include <sys/resource.h>
30 #include "libguile/_scm.h"
31 #include "libguile/async.h"
32 #include "libguile/eval.h"
33 #include "libguile/list.h"
34 #include "libguile/stackchk.h"
35 #include "libguile/throw.h"
36 #include "libguile/macros.h"
37 #include "libguile/smob.h"
38 #include "libguile/struct.h"
39 #include "libguile/procprop.h"
40 #include "libguile/srcprop.h"
41 #include "libguile/alist.h"
42 #include "libguile/continuations.h"
43 #include "libguile/strports.h"
44 #include "libguile/read.h"
45 #include "libguile/feature.h"
46 #include "libguile/dynwind.h"
47 #include "libguile/modules.h"
48 #include "libguile/ports.h"
49 #include "libguile/root.h"
50 #include "libguile/fluids.h"
51 #include "libguile/programs.h"
52 #include "libguile/memoize.h"
53 #include "libguile/vm.h"
55 #include "libguile/validate.h"
56 #include "libguile/debug.h"
58 #include "libguile/private-options.h"
66 scm_t_option scm_debug_opts
[] = {
67 { SCM_OPTION_BOOLEAN
, "backwards", 0,
68 "Display backtrace in anti-chronological order." },
69 { SCM_OPTION_INTEGER
, "width", 79, "Maximal width of backtrace." },
70 { SCM_OPTION_INTEGER
, "depth", 20, "Maximal length of printed backtrace." },
71 { SCM_OPTION_BOOLEAN
, "backtrace", 1, "Show backtrace on error." },
72 /* This default stack limit will be overridden by init_stack_limit(),
73 if we have getrlimit() and the stack limit is not INFINITY. But it is still
74 important, as some systems have both the soft and the hard limits set to
75 INFINITY; in that case we fall back to this value.
77 The situation is aggravated by certain compilers, which can consume
78 "beaucoup de stack", as they say in France.
80 See http://thread.gmane.org/gmane.lisp.guile.devel/8599/focus=8662 for
81 more discussion. This setting is 640 KB on 32-bit arches (should be enough
82 for anyone!) or a whoppin' 1280 KB on 64-bit arches.
84 { SCM_OPTION_INTEGER
, "stack", 160000, "Stack size limit (measured in words; 0 = no check)." },
85 { SCM_OPTION_SCM
, "show-file-name", SCM_BOOL_T_BITS
,
86 "Show file names and line numbers "
87 "in backtraces when not `#f'. A value of `base' "
88 "displays only base names, while `#t' displays full names."},
89 { SCM_OPTION_BOOLEAN
, "warn-deprecated", 0,
90 "Warn when deprecated features are used." },
95 /* {Run time control of the debugging evaluator}
98 SCM_DEFINE (scm_debug_options
, "debug-options-interface", 0, 1, 0,
100 "Option interface for the debug options. Instead of using\n"
101 "this procedure directly, use the procedures @code{debug-enable},\n"
102 "@code{debug-disable}, @code{debug-set!} and @code{debug-options}.")
103 #define FUNC_NAME s_scm_debug_options
107 scm_dynwind_begin (0);
108 scm_dynwind_critical_section (SCM_BOOL_F
);
110 ans
= scm_options (setting
, scm_debug_opts
, FUNC_NAME
);
111 scm_stack_checking_enabled_p
= SCM_STACK_CHECKING_P
;
122 SCM_REGISTER_PROC (s_reverse_lookup
, "reverse-lookup", 2, 0, 0, scm_reverse_lookup
);
126 scm_reverse_lookup (SCM env
, SCM data
)
128 while (scm_is_pair (env
) && scm_is_pair (SCM_CAR (env
)))
130 SCM names
= SCM_CAAR (env
);
131 SCM values
= SCM_CDAR (env
);
132 while (scm_is_pair (names
))
134 if (scm_is_eq (SCM_CAR (values
), data
))
135 return SCM_CAR (names
);
136 names
= SCM_CDR (names
);
137 values
= SCM_CDR (values
);
139 if (!scm_is_null (names
) && scm_is_eq (values
, data
))
148 /* Undocumented debugging procedure */
150 SCM_DEFINE (scm_debug_hang
, "debug-hang", 0, 1, 0,
152 "Go into an endless loop, which can be only terminated with\n"
154 #define FUNC_NAME s_scm_debug_hang
158 return SCM_UNSPECIFIED
;
163 static SCM local_eval_var
;
166 init_local_eval_var (void)
168 local_eval_var
= scm_c_public_variable ("ice-9 local-eval", "local-eval");
172 scm_local_eval (SCM exp
, SCM env
)
174 static scm_i_pthread_once_t once
= SCM_I_PTHREAD_ONCE_INIT
;
175 scm_i_pthread_once (&once
, init_local_eval_var
);
177 return scm_call_2 (scm_variable_ref (local_eval_var
), exp
, env
);
181 init_stack_limit (void)
183 #ifdef HAVE_GETRLIMIT
185 if (getrlimit (RLIMIT_STACK
, &lim
) == 0)
187 rlim_t bytes
= lim
.rlim_cur
;
189 /* set our internal stack limit to 80% of the rlimit. */
190 if (bytes
== RLIM_INFINITY
)
191 bytes
= lim
.rlim_max
;
193 if (bytes
!= RLIM_INFINITY
)
194 SCM_STACK_LIMIT
= bytes
* 8 / 10 / sizeof (scm_t_bits
);
206 scm_init_opts (scm_debug_options
, scm_debug_opts
);
208 scm_add_feature ("debug-extensions");
210 #include "libguile/debug.x"