Commit | Line | Data |
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ab4f3efb | 1 | /* Printing of backtraces and error messages |
2b829bbb | 2 | * Copyright (C) 1996,1997,1998,1999,2000,2001, 2003, 2004, 2006 Free Software Foundation |
ab4f3efb | 3 | * |
73be1d9e MV |
4 | * This library is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
ab4f3efb | 8 | * |
73be1d9e | 9 | * This library is distributed in the hope that it will be useful, |
ab4f3efb | 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
73be1d9e MV |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. | |
ab4f3efb | 13 | * |
73be1d9e MV |
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 | |
92205699 | 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 17 | */ |
ab4f3efb | 18 | |
615873d2 RB |
19 | #if HAVE_CONFIG_H |
20 | # include <config.h> | |
21 | #endif | |
1bbd0b84 | 22 | |
7beabedb | 23 | #include <stdio.h> |
2b407f9b | 24 | #include <ctype.h> |
8824ac88 | 25 | #include <assert.h> |
2b407f9b | 26 | |
a0599745 | 27 | #include "libguile/_scm.h" |
2fb36297 | 28 | |
b1508ade MD |
29 | #ifdef HAVE_UNISTD_H |
30 | #include <unistd.h> | |
31 | #endif | |
82893676 MG |
32 | #ifdef HAVE_IO_H |
33 | #include <io.h> | |
34 | #endif | |
b1508ade | 35 | |
a0599745 MD |
36 | #include "libguile/stacks.h" |
37 | #include "libguile/srcprop.h" | |
38 | #include "libguile/struct.h" | |
39 | #include "libguile/strports.h" | |
40 | #include "libguile/throw.h" | |
41 | #include "libguile/fluids.h" | |
42 | #include "libguile/ports.h" | |
43 | #include "libguile/strings.h" | |
dfd03fb9 | 44 | #include "libguile/dynwind.h" |
ab4f3efb | 45 | |
a0599745 | 46 | #include "libguile/validate.h" |
af68e5e5 | 47 | #include "libguile/lang.h" |
a0599745 | 48 | #include "libguile/backtrace.h" |
fec097f0 | 49 | #include "libguile/filesys.h" |
ab4f3efb MD |
50 | |
51 | /* {Error reporting and backtraces} | |
ab4f3efb MD |
52 | * |
53 | * Note that these functions shouldn't generate errors themselves. | |
54 | */ | |
55 | ||
dfd03fb9 MD |
56 | /* Print parameters for error messages. */ |
57 | ||
58 | #define DISPLAY_ERROR_MESSAGE_MAX_LEVEL 7 | |
59 | #define DISPLAY_ERROR_MESSAGE_MAX_LENGTH 10 | |
60 | ||
61 | /* Print parameters for failing expressions in error messages. | |
62 | * (See also `print_params' below for backtrace print parameters.) | |
63 | */ | |
64 | ||
65 | #define DISPLAY_EXPRESSION_MAX_LEVEL 2 | |
66 | #define DISPLAY_EXPRESSION_MAX_LENGTH 3 | |
67 | ||
ab4f3efb MD |
68 | #undef SCM_ASSERT |
69 | #define SCM_ASSERT(_cond, _arg, _pos, _subr) \ | |
70 | if (!(_cond)) \ | |
71 | return SCM_BOOL_F; | |
ab4f3efb | 72 | |
86d31dfe | 73 | SCM scm_the_last_stack_fluid_var; |
b6609fc7 | 74 | |
ab4f3efb | 75 | static void |
1bbd0b84 | 76 | display_header (SCM source, SCM port) |
ab4f3efb | 77 | { |
2f2b390c | 78 | if (SCM_MEMOIZEDP (source)) |
ab4f3efb | 79 | { |
2f2b390c DH |
80 | SCM fname = scm_source_property (source, scm_sym_filename); |
81 | SCM line = scm_source_property (source, scm_sym_line); | |
82 | SCM col = scm_source_property (source, scm_sym_column); | |
83 | ||
84 | /* Dirk:FIXME:: Maybe we should store the _port_ rather than the | |
85 | * filename with the source properties? Then we could in case of | |
86 | * non-file ports give at least some more details than just | |
87 | * "<unnamed port>". */ | |
3b9ee0a4 | 88 | if (scm_is_true (fname)) |
2f2b390c DH |
89 | scm_prin1 (fname, port, 0); |
90 | else | |
91 | scm_puts ("<unnamed port>", port); | |
92 | ||
7888309b | 93 | if (scm_is_true (line) && scm_is_true (col)) |
2f2b390c DH |
94 | { |
95 | scm_putc (':', port); | |
e11e83f3 | 96 | scm_intprint (scm_to_long (line) + 1, 10, port); |
2f2b390c | 97 | scm_putc (':', port); |
e11e83f3 | 98 | scm_intprint (scm_to_long (col) + 1, 10, port); |
2f2b390c | 99 | } |
ab4f3efb MD |
100 | } |
101 | else | |
b7f3516f TT |
102 | scm_puts ("ERROR", port); |
103 | scm_puts (": ", port); | |
ab4f3efb MD |
104 | } |
105 | ||
f3acc5c1 | 106 | |
dfd03fb9 MD |
107 | struct display_error_message_data { |
108 | SCM message; | |
109 | SCM args; | |
110 | SCM port; | |
111 | scm_print_state *pstate; | |
112 | int old_fancyp; | |
113 | int old_level; | |
114 | int old_length; | |
115 | }; | |
116 | ||
117 | static SCM | |
118 | display_error_message (struct display_error_message_data *d) | |
119 | { | |
3b9ee0a4 | 120 | if (scm_is_string (d->message) && scm_is_true (scm_list_p (d->args))) |
dfd03fb9 MD |
121 | scm_simple_format (d->port, d->message, d->args); |
122 | else | |
123 | scm_display (d->message, d->port); | |
124 | scm_newline (d->port); | |
125 | return SCM_UNSPECIFIED; | |
126 | } | |
127 | ||
128 | static void | |
129 | before_display_error_message (struct display_error_message_data *d) | |
130 | { | |
131 | scm_print_state *pstate = d->pstate; | |
132 | d->old_fancyp = pstate->fancyp; | |
133 | d->old_level = pstate->level; | |
134 | d->old_length = pstate->length; | |
135 | pstate->fancyp = 1; | |
136 | pstate->level = DISPLAY_ERROR_MESSAGE_MAX_LEVEL; | |
137 | pstate->length = DISPLAY_ERROR_MESSAGE_MAX_LENGTH; | |
138 | } | |
139 | ||
140 | static void | |
141 | after_display_error_message (struct display_error_message_data *d) | |
142 | { | |
143 | scm_print_state *pstate = d->pstate; | |
144 | pstate->fancyp = d->old_fancyp; | |
145 | pstate->level = d->old_level; | |
146 | pstate->length = d->old_length; | |
147 | } | |
148 | ||
f3acc5c1 | 149 | void |
6e8d25a6 | 150 | scm_display_error_message (SCM message, SCM args, SCM port) |
ab4f3efb | 151 | { |
dfd03fb9 MD |
152 | struct display_error_message_data d; |
153 | SCM print_state; | |
154 | scm_print_state *pstate; | |
155 | ||
156 | port = scm_i_port_with_print_state (port, SCM_UNDEFINED); | |
157 | print_state = SCM_PORT_WITH_PS_PS (port); | |
158 | pstate = SCM_PRINT_STATE (print_state); | |
159 | ||
160 | d.message = message; | |
161 | d.args = args; | |
162 | d.port = port; | |
163 | d.pstate = pstate; | |
164 | scm_internal_dynamic_wind ((scm_t_guard) before_display_error_message, | |
165 | (scm_t_inner) display_error_message, | |
166 | (scm_t_guard) after_display_error_message, | |
167 | &d, | |
168 | &d); | |
ab4f3efb MD |
169 | } |
170 | ||
ab4f3efb | 171 | static void |
34d19ef6 | 172 | display_expression (SCM frame, SCM pname, SCM source, SCM port) |
ab4f3efb MD |
173 | { |
174 | SCM print_state = scm_make_print_state (); | |
175 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); | |
176 | pstate->writingp = 0; | |
177 | pstate->fancyp = 1; | |
dfd03fb9 MD |
178 | pstate->level = DISPLAY_EXPRESSION_MAX_LEVEL; |
179 | pstate->length = DISPLAY_EXPRESSION_MAX_LENGTH; | |
cc95e00a | 180 | if (scm_is_symbol (pname) || scm_is_string (pname)) |
ab4f3efb | 181 | { |
cabe682c | 182 | if (SCM_FRAMEP (frame) |
ab4f3efb | 183 | && SCM_FRAME_EVAL_ARGS_P (frame)) |
b7f3516f | 184 | scm_puts ("While evaluating arguments to ", port); |
ab4f3efb | 185 | else |
b7f3516f | 186 | scm_puts ("In procedure ", port); |
ab4f3efb | 187 | scm_iprin1 (pname, port, pstate); |
0c95b57d | 188 | if (SCM_MEMOIZEDP (source)) |
ab4f3efb | 189 | { |
b7f3516f | 190 | scm_puts (" in expression ", port); |
ab4f3efb | 191 | pstate->writingp = 1; |
9fcf3cbb | 192 | scm_iprin1 (scm_i_unmemoize_expr (source), port, pstate); |
ab4f3efb MD |
193 | } |
194 | } | |
5843e5c9 | 195 | else if (SCM_MEMOIZEDP (source)) |
ab4f3efb | 196 | { |
b7f3516f | 197 | scm_puts ("In expression ", port); |
ab4f3efb | 198 | pstate->writingp = 1; |
9fcf3cbb | 199 | scm_iprin1 (scm_i_unmemoize_expr (source), port, pstate); |
ab4f3efb | 200 | } |
b7f3516f | 201 | scm_puts (":\n", port); |
ab4f3efb MD |
202 | scm_free_print_state (print_state); |
203 | } | |
204 | ||
bdf8afff MD |
205 | struct display_error_args { |
206 | SCM stack; | |
207 | SCM port; | |
208 | SCM subr; | |
209 | SCM message; | |
210 | SCM args; | |
211 | SCM rest; | |
212 | }; | |
213 | ||
214 | static SCM | |
39752bec | 215 | display_error_body (struct display_error_args *a) |
ab4f3efb MD |
216 | { |
217 | SCM current_frame = SCM_BOOL_F; | |
218 | SCM source = SCM_BOOL_F; | |
a88a4c8a | 219 | SCM prev_frame = SCM_BOOL_F; |
b24b5e13 | 220 | SCM pname = a->subr; |
a88a4c8a | 221 | |
434f2f7a | 222 | if (scm_debug_mode_p |
bdf8afff MD |
223 | && SCM_STACKP (a->stack) |
224 | && SCM_STACK_LENGTH (a->stack) > 0) | |
ab4f3efb | 225 | { |
bdf8afff | 226 | current_frame = scm_stack_ref (a->stack, SCM_INUM0); |
ab4f3efb | 227 | source = SCM_FRAME_SOURCE (current_frame); |
a88a4c8a | 228 | prev_frame = SCM_FRAME_PREV (current_frame); |
7888309b | 229 | if (!SCM_MEMOIZEDP (source) && scm_is_true (prev_frame)) |
a88a4c8a | 230 | source = SCM_FRAME_SOURCE (prev_frame); |
cc95e00a | 231 | if (!scm_is_symbol (pname) |
3b9ee0a4 MV |
232 | && !scm_is_string (pname) |
233 | && SCM_FRAME_PROC_P (current_frame) | |
bc36d050 | 234 | && scm_is_true (scm_procedure_p (SCM_FRAME_PROC (current_frame)))) |
ab4f3efb MD |
235 | pname = scm_procedure_name (SCM_FRAME_PROC (current_frame)); |
236 | } | |
cc95e00a | 237 | if (scm_is_symbol (pname) || scm_is_string (pname) || SCM_MEMOIZEDP (source)) |
ab4f3efb | 238 | { |
bdf8afff MD |
239 | display_header (source, a->port); |
240 | display_expression (current_frame, pname, source, a->port); | |
ab4f3efb | 241 | } |
bdf8afff MD |
242 | display_header (source, a->port); |
243 | scm_display_error_message (a->message, a->args, a->port); | |
244 | return SCM_UNSPECIFIED; | |
245 | } | |
246 | ||
247 | struct display_error_handler_data { | |
248 | char *mode; | |
249 | SCM port; | |
250 | }; | |
251 | ||
252 | /* This is the exception handler for error reporting routines. | |
253 | Note that it is very important that this handler *doesn't* try to | |
254 | print more than the error tag, since the error very probably is | |
255 | caused by an erroneous print call-back routine. If we would | |
2fdcf8bd | 256 | try to print all objects, we would enter an infinite loop. */ |
bdf8afff MD |
257 | static SCM |
258 | display_error_handler (struct display_error_handler_data *data, | |
e81d98ec | 259 | SCM tag, SCM args SCM_UNUSED) |
bdf8afff MD |
260 | { |
261 | SCM print_state = scm_make_print_state (); | |
b7f3516f TT |
262 | scm_puts ("\nException during displaying of ", data->port); |
263 | scm_puts (data->mode, data->port); | |
264 | scm_puts (": ", data->port); | |
bdf8afff | 265 | scm_iprin1 (tag, data->port, SCM_PRINT_STATE (print_state)); |
b7f3516f | 266 | scm_putc ('\n', data->port); |
bdf8afff MD |
267 | return SCM_UNSPECIFIED; |
268 | } | |
269 | ||
e40a4095 DH |
270 | |
271 | /* The function scm_i_display_error prints out a detailed error message. This | |
272 | * function will be called directly within libguile to signal error messages. | |
273 | * No parameter checks will be performed by scm_i_display_error. Thus, User | |
274 | * code should rather use the function scm_display_error. | |
275 | */ | |
276 | void | |
277 | scm_i_display_error (SCM stack, SCM port, SCM subr, SCM message, SCM args, SCM rest) | |
bdf8afff | 278 | { |
0b2cb4ee MD |
279 | struct display_error_args a; |
280 | struct display_error_handler_data data; | |
281 | a.stack = stack; | |
282 | a.port = port; | |
283 | a.subr = subr; | |
284 | a.message = message; | |
285 | a.args = args; | |
286 | a.rest = rest; | |
287 | data.mode = "error"; | |
288 | data.port = port; | |
bdf8afff | 289 | scm_internal_catch (SCM_BOOL_T, |
92c2555f MV |
290 | (scm_t_catch_body) display_error_body, &a, |
291 | (scm_t_catch_handler) display_error_handler, &data); | |
e40a4095 DH |
292 | } |
293 | ||
294 | ||
295 | SCM_DEFINE (scm_display_error, "display-error", 6, 0, 0, | |
296 | (SCM stack, SCM port, SCM subr, SCM message, SCM args, SCM rest), | |
c73bdd3a MG |
297 | "Display an error message to the output port @var{port}.\n" |
298 | "@var{stack} is the saved stack for the error, @var{subr} is\n" | |
bb2c02f2 | 299 | "the name of the procedure in which the error occurred and\n" |
c73bdd3a MG |
300 | "@var{message} is the actual error message, which may contain\n" |
301 | "formatting instructions. These will format the arguments in\n" | |
302 | "the list @var{args} accordingly. @var{rest} is currently\n" | |
303 | "ignored.") | |
e40a4095 DH |
304 | #define FUNC_NAME s_scm_display_error |
305 | { | |
306 | SCM_VALIDATE_OUTPUT_PORT (2, port); | |
307 | ||
308 | scm_i_display_error (stack, port, subr, message, args, rest); | |
309 | ||
ab4f3efb MD |
310 | return SCM_UNSPECIFIED; |
311 | } | |
1bbd0b84 | 312 | #undef FUNC_NAME |
ab4f3efb | 313 | |
e40a4095 | 314 | |
2b407f9b MD |
315 | typedef struct { |
316 | int level; | |
317 | int length; | |
318 | } print_params_t; | |
319 | ||
320 | static int n_print_params = 9; | |
321 | static print_params_t default_print_params[] = { | |
322 | { 4, 9 }, { 4, 3 }, | |
323 | { 3, 4 }, { 3, 3 }, | |
324 | { 2, 4 }, { 2, 3 }, | |
325 | { 1, 4 }, { 1, 3 }, { 1, 2 } | |
326 | }; | |
327 | static print_params_t *print_params = default_print_params; | |
328 | ||
329 | #ifdef GUILE_DEBUG | |
3b3b36dd | 330 | SCM_DEFINE (scm_set_print_params_x, "set-print-params!", 1, 0, 0, |
5623a9b4 | 331 | (SCM params), |
c73bdd3a MG |
332 | "Set the print parameters to the values from @var{params}.\n" |
333 | "@var{params} must be a list of two-element lists which must\n" | |
334 | "hold two integer values.") | |
e8e9b690 | 335 | #define FUNC_NAME s_scm_set_print_params_x |
2b407f9b | 336 | { |
3fceef59 MD |
337 | int i; |
338 | int n; | |
2b407f9b MD |
339 | SCM ls; |
340 | print_params_t *new_params; | |
3fceef59 MD |
341 | |
342 | SCM_VALIDATE_NONEMPTYLIST_COPYLEN (2, params, n); | |
c96d76b8 | 343 | for (ls = params; !SCM_NULL_OR_NIL_P (ls); ls = SCM_CDR (ls)) |
2b407f9b | 344 | SCM_ASSERT (scm_ilength (SCM_CAR (params)) == 2 |
e11e83f3 MV |
345 | && scm_is_unsigned_integer (SCM_CAAR (ls), 0, INT_MAX) |
346 | && scm_is_unsigned_integer (SCM_CADAR (ls), 0, INT_MAX), | |
2b407f9b MD |
347 | params, |
348 | SCM_ARG2, | |
e8e9b690 | 349 | s_scm_set_print_params_x); |
4c9419ac | 350 | new_params = scm_malloc (n * sizeof (print_params_t)); |
2b407f9b | 351 | if (print_params != default_print_params) |
4c9419ac | 352 | free (print_params); |
2b407f9b MD |
353 | print_params = new_params; |
354 | for (i = 0; i < n; ++i) | |
355 | { | |
e11e83f3 MV |
356 | print_params[i].level = scm_to_int (SCM_CAAR (params)); |
357 | print_params[i].length = scm_to_int (SCM_CADAR (params)); | |
2b407f9b MD |
358 | params = SCM_CDR (params); |
359 | } | |
360 | n_print_params = n; | |
361 | return SCM_UNSPECIFIED; | |
362 | } | |
1bbd0b84 | 363 | #undef FUNC_NAME |
2b407f9b MD |
364 | #endif |
365 | ||
ab4f3efb | 366 | static void |
1bbd0b84 | 367 | indent (int n, SCM port) |
ab4f3efb MD |
368 | { |
369 | int i; | |
370 | for (i = 0; i < n; ++i) | |
b7f3516f | 371 | scm_putc (' ', port); |
ab4f3efb MD |
372 | } |
373 | ||
ab4f3efb | 374 | static void |
34d19ef6 | 375 | display_frame_expr (char *hdr, SCM exp, char *tlr, int indentation, SCM sport, SCM port, scm_print_state *pstate) |
ab4f3efb | 376 | { |
2b407f9b | 377 | int i = 0, n; |
92c2555f | 378 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (sport); |
2b407f9b | 379 | do |
ab4f3efb | 380 | { |
2b407f9b MD |
381 | pstate->length = print_params[i].length; |
382 | ptob->seek (sport, 0, SEEK_SET); | |
d2e53ed6 | 383 | if (scm_is_pair (exp)) |
2b407f9b MD |
384 | { |
385 | pstate->level = print_params[i].level - 1; | |
386 | scm_iprlist (hdr, exp, tlr[0], sport, pstate); | |
387 | scm_puts (&tlr[1], sport); | |
388 | } | |
389 | else | |
390 | { | |
391 | pstate->level = print_params[i].level; | |
392 | scm_iprin1 (exp, sport, pstate); | |
393 | } | |
394 | ptob->flush (sport); | |
395 | n = ptob->seek (sport, 0, SEEK_CUR); | |
396 | ++i; | |
ab4f3efb | 397 | } |
2b407f9b MD |
398 | while (indentation + n > SCM_BACKTRACE_WIDTH && i < n_print_params); |
399 | ptob->truncate (sport, n); | |
2b407f9b | 400 | |
22e47f69 | 401 | scm_display (scm_strport_to_string (sport), port); |
ab4f3efb MD |
402 | } |
403 | ||
e3c37929 | 404 | static void |
34d19ef6 | 405 | display_application (SCM frame, int indentation, SCM sport, SCM port, scm_print_state *pstate) |
e3c37929 MD |
406 | { |
407 | SCM proc = SCM_FRAME_PROC (frame); | |
7888309b | 408 | SCM name = (scm_is_true (scm_procedure_p (proc)) |
e3c37929 MD |
409 | ? scm_procedure_name (proc) |
410 | : SCM_BOOL_F); | |
411 | display_frame_expr ("[", | |
7888309b | 412 | scm_cons (scm_is_true (name) ? name : proc, |
e3c37929 MD |
413 | SCM_FRAME_ARGS (frame)), |
414 | SCM_FRAME_EVAL_ARGS_P (frame) ? " ..." : "]", | |
415 | indentation, | |
416 | sport, | |
417 | port, | |
418 | pstate); | |
419 | } | |
420 | ||
3b3b36dd | 421 | SCM_DEFINE (scm_display_application, "display-application", 1, 2, 0, |
1bbd0b84 | 422 | (SCM frame, SCM port, SCM indent), |
c73bdd3a MG |
423 | "Display a procedure application @var{frame} to the output port\n" |
424 | "@var{port}. @var{indent} specifies the indentation of the\n" | |
425 | "output.") | |
1bbd0b84 | 426 | #define FUNC_NAME s_scm_display_application |
e3c37929 | 427 | { |
34d19ef6 | 428 | SCM_VALIDATE_FRAME (1, frame); |
e3c37929 | 429 | if (SCM_UNBNDP (port)) |
9de87eea | 430 | port = scm_current_output_port (); |
2b407f9b | 431 | else |
34d19ef6 | 432 | SCM_VALIDATE_OPOUTPORT (2, port); |
2b407f9b MD |
433 | if (SCM_UNBNDP (indent)) |
434 | indent = SCM_INUM0; | |
2b407f9b | 435 | |
e3c37929 MD |
436 | if (SCM_FRAME_PROC_P (frame)) |
437 | /* Display an application. */ | |
438 | { | |
2b407f9b | 439 | SCM sport, print_state; |
e3c37929 MD |
440 | scm_print_state *pstate; |
441 | ||
2b407f9b MD |
442 | /* Create a string port used for adaptation of printing parameters. */ |
443 | sport = scm_mkstrport (SCM_INUM0, | |
93ccaef0 | 444 | scm_make_string (scm_from_int (240), |
2b407f9b MD |
445 | SCM_UNDEFINED), |
446 | SCM_OPN | SCM_WRTNG, | |
1bbd0b84 | 447 | FUNC_NAME); |
2b407f9b | 448 | |
e3c37929 MD |
449 | /* Create a print state for printing of frames. */ |
450 | print_state = scm_make_print_state (); | |
451 | pstate = SCM_PRINT_STATE (print_state); | |
452 | pstate->writingp = 1; | |
453 | pstate->fancyp = 1; | |
e3c37929 | 454 | |
a55c2b68 | 455 | display_application (frame, scm_to_int (indent), sport, port, pstate); |
e3c37929 MD |
456 | return SCM_BOOL_T; |
457 | } | |
458 | else | |
459 | return SCM_BOOL_F; | |
460 | } | |
1bbd0b84 | 461 | #undef FUNC_NAME |
e3c37929 | 462 | |
fec097f0 MV |
463 | SCM_SYMBOL (sym_base, "base"); |
464 | ||
465 | static void | |
466 | display_backtrace_get_file_line (SCM frame, SCM *file, SCM *line) | |
467 | { | |
468 | SCM source = SCM_FRAME_SOURCE (frame); | |
469 | *file = SCM_MEMOIZEDP (source) ? scm_source_property (source, scm_sym_filename) : SCM_BOOL_F; | |
470 | *line = (SCM_MEMOIZEDP (source)) ? scm_source_property (source, scm_sym_line) : SCM_BOOL_F; | |
471 | } | |
472 | ||
473 | static void | |
474 | display_backtrace_file (frame, last_file, port, pstate) | |
475 | SCM frame; | |
476 | SCM *last_file; | |
477 | SCM port; | |
478 | scm_print_state *pstate; | |
479 | { | |
480 | SCM file, line; | |
481 | ||
482 | display_backtrace_get_file_line (frame, &file, &line); | |
483 | ||
bc36d050 | 484 | if (scm_is_eq (file, *last_file)) |
fec097f0 MV |
485 | return; |
486 | ||
487 | *last_file = file; | |
488 | ||
489 | scm_puts ("In ", port); | |
7888309b MV |
490 | if (scm_is_false (file)) |
491 | if (scm_is_false (line)) | |
fec097f0 MV |
492 | scm_puts ("unknown file", port); |
493 | else | |
494 | scm_puts ("current input", port); | |
495 | else | |
496 | { | |
497 | pstate->writingp = 0; | |
498 | scm_iprin1 (file, port, pstate); | |
499 | pstate->writingp = 1; | |
500 | } | |
501 | scm_puts (":\n", port); | |
502 | } | |
503 | ||
504 | static void | |
505 | display_backtrace_file_and_line (SCM frame, SCM port, scm_print_state *pstate) | |
506 | { | |
507 | SCM file, line; | |
508 | ||
509 | display_backtrace_get_file_line (frame, &file, &line); | |
510 | ||
bc36d050 | 511 | if (scm_is_eq (SCM_PACK (SCM_SHOW_FILE_NAME), sym_base)) |
fec097f0 | 512 | { |
7888309b | 513 | if (scm_is_false (file)) |
fec097f0 | 514 | { |
7888309b | 515 | if (scm_is_false (line)) |
fec097f0 MV |
516 | scm_putc ('?', port); |
517 | else | |
518 | scm_puts ("<stdin>", port); | |
519 | } | |
520 | else | |
521 | { | |
522 | pstate -> writingp = 0; | |
4110fa69 | 523 | #ifdef HAVE_POSIX |
3b9ee0a4 MV |
524 | scm_iprin1 ((scm_is_string (file)? |
525 | scm_basename (file, SCM_UNDEFINED) : file), | |
fec097f0 | 526 | port, pstate); |
4110fa69 MV |
527 | #else |
528 | scm_iprin1 (file, port, pstate); | |
529 | #endif | |
fec097f0 MV |
530 | pstate -> writingp = 1; |
531 | } | |
532 | ||
533 | scm_putc (':', port); | |
534 | } | |
7888309b | 535 | else if (scm_is_true (line)) |
fec097f0 MV |
536 | { |
537 | int i, j=0; | |
e11e83f3 | 538 | for (i = scm_to_int (line)+1; i > 0; i = i/10, j++) |
fec097f0 MV |
539 | ; |
540 | indent (4-j, port); | |
541 | } | |
542 | ||
7888309b | 543 | if (scm_is_false (line)) |
fec097f0 MV |
544 | scm_puts (" ?", port); |
545 | else | |
e11e83f3 | 546 | scm_intprint (scm_to_int (line) + 1, 10, port); |
fec097f0 MV |
547 | scm_puts (": ", port); |
548 | } | |
549 | ||
ab4f3efb | 550 | static void |
34d19ef6 | 551 | display_frame (SCM frame, int nfield, int indentation, SCM sport, SCM port, scm_print_state *pstate) |
ab4f3efb MD |
552 | { |
553 | int n, i, j; | |
554 | ||
555 | /* Announce missing frames? */ | |
556 | if (!SCM_BACKWARDS_P && SCM_FRAME_OVERFLOW_P (frame)) | |
557 | { | |
558 | indent (nfield + 1 + indentation, port); | |
b7f3516f | 559 | scm_puts ("...\n", port); |
ab4f3efb MD |
560 | } |
561 | ||
fec097f0 | 562 | /* display file name and line number */ |
7888309b | 563 | if (scm_is_true (SCM_PACK (SCM_SHOW_FILE_NAME))) |
fec097f0 MV |
564 | display_backtrace_file_and_line (frame, port, pstate); |
565 | ||
ab4f3efb MD |
566 | /* Check size of frame number. */ |
567 | n = SCM_FRAME_NUMBER (frame); | |
568 | for (i = 0, j = n; j > 0; ++i) j /= 10; | |
569 | ||
570 | /* Number indentation. */ | |
571 | indent (nfield - (i ? i : 1), port); | |
572 | ||
573 | /* Frame number. */ | |
93ccaef0 | 574 | scm_iprin1 (scm_from_int (n), port, pstate); |
ab4f3efb MD |
575 | |
576 | /* Real frame marker */ | |
b7f3516f | 577 | scm_putc (SCM_FRAME_REAL_P (frame) ? '*' : ' ', port); |
ab4f3efb MD |
578 | |
579 | /* Indentation. */ | |
580 | indent (indentation, port); | |
581 | ||
582 | if (SCM_FRAME_PROC_P (frame)) | |
583 | /* Display an application. */ | |
e3c37929 | 584 | display_application (frame, nfield + 1 + indentation, sport, port, pstate); |
ab4f3efb MD |
585 | else |
586 | /* Display a special form. */ | |
587 | { | |
588 | SCM source = SCM_FRAME_SOURCE (frame); | |
d2e53ed6 | 589 | SCM copy = (scm_is_pair (source) |
7f2d92b1 | 590 | ? scm_source_property (source, scm_sym_copy) |
2e9d6c6d | 591 | : SCM_BOOL_F); |
0c95b57d | 592 | SCM umcopy = (SCM_MEMOIZEDP (source) |
9fcf3cbb | 593 | ? scm_i_unmemoize_expr (source) |
2e9d6c6d | 594 | : SCM_BOOL_F); |
ab4f3efb | 595 | display_frame_expr ("(", |
d2e53ed6 | 596 | scm_is_pair (copy) ? copy : umcopy, |
ab4f3efb MD |
597 | ")", |
598 | nfield + 1 + indentation, | |
599 | sport, | |
600 | port, | |
601 | pstate); | |
602 | } | |
1ae6af28 | 603 | scm_putc ('\n', port); |
ab4f3efb MD |
604 | |
605 | /* Announce missing frames? */ | |
606 | if (SCM_BACKWARDS_P && SCM_FRAME_OVERFLOW_P (frame)) | |
607 | { | |
608 | indent (nfield + 1 + indentation, port); | |
b7f3516f | 609 | scm_puts ("...\n", port); |
ab4f3efb MD |
610 | } |
611 | } | |
612 | ||
bdf8afff MD |
613 | struct display_backtrace_args { |
614 | SCM stack; | |
615 | SCM port; | |
616 | SCM first; | |
617 | SCM depth; | |
2b55be75 | 618 | SCM highlight_objects; |
bdf8afff MD |
619 | }; |
620 | ||
bdf8afff | 621 | static SCM |
5843e5c9 | 622 | display_backtrace_body (struct display_backtrace_args *a) |
1bbd0b84 | 623 | #define FUNC_NAME "display_backtrace_body" |
ab4f3efb MD |
624 | { |
625 | int n_frames, beg, end, n, i, j; | |
626 | int nfield, indent_p, indentation; | |
627 | SCM frame, sport, print_state; | |
fec097f0 | 628 | SCM last_file; |
ab4f3efb MD |
629 | scm_print_state *pstate; |
630 | ||
78446828 MV |
631 | a->port = SCM_COERCE_OUTPORT (a->port); |
632 | ||
ab4f3efb | 633 | /* Argument checking and extraction. */ |
5843e5c9 DH |
634 | SCM_VALIDATE_STACK (1, a->stack); |
635 | SCM_VALIDATE_OPOUTPORT (2, a->port); | |
e11e83f3 MV |
636 | n_frames = scm_to_int (scm_stack_length (a->stack)); |
637 | n = scm_is_integer (a->depth) ? scm_to_int (a->depth) : SCM_BACKTRACE_DEPTH; | |
ab4f3efb MD |
638 | if (SCM_BACKWARDS_P) |
639 | { | |
e11e83f3 | 640 | beg = scm_is_integer (a->first) ? scm_to_int (a->first) : 0; |
ab4f3efb MD |
641 | end = beg + n - 1; |
642 | if (end >= n_frames) | |
643 | end = n_frames - 1; | |
644 | n = end - beg + 1; | |
645 | } | |
646 | else | |
647 | { | |
e11e83f3 | 648 | if (scm_is_integer (a->first)) |
ab4f3efb | 649 | { |
e11e83f3 | 650 | beg = scm_to_int (a->first); |
ab4f3efb MD |
651 | end = beg - n + 1; |
652 | if (end < 0) | |
653 | end = 0; | |
654 | } | |
655 | else | |
656 | { | |
657 | beg = n - 1; | |
658 | end = 0; | |
659 | if (beg >= n_frames) | |
660 | beg = n_frames - 1; | |
661 | } | |
662 | n = beg - end + 1; | |
663 | } | |
bdf8afff MD |
664 | SCM_ASSERT (beg >= 0 && beg < n_frames, a->first, SCM_ARG3, s_display_backtrace); |
665 | SCM_ASSERT (n > 0, a->depth, SCM_ARG4, s_display_backtrace); | |
ab4f3efb MD |
666 | |
667 | /* Create a string port used for adaptation of printing parameters. */ | |
668 | sport = scm_mkstrport (SCM_INUM0, | |
93ccaef0 | 669 | scm_make_string (scm_from_int (240), SCM_UNDEFINED), |
ab4f3efb | 670 | SCM_OPN | SCM_WRTNG, |
1bbd0b84 | 671 | FUNC_NAME); |
ab4f3efb MD |
672 | |
673 | /* Create a print state for printing of frames. */ | |
674 | print_state = scm_make_print_state (); | |
675 | pstate = SCM_PRINT_STATE (print_state); | |
676 | pstate->writingp = 1; | |
677 | pstate->fancyp = 1; | |
2b55be75 | 678 | pstate->highlight_objects = a->highlight_objects; |
ab4f3efb MD |
679 | |
680 | /* First find out if it's reasonable to do indentation. */ | |
681 | if (SCM_BACKWARDS_P) | |
682 | indent_p = 0; | |
683 | else | |
684 | { | |
5843e5c9 DH |
685 | unsigned int j; |
686 | ||
ab4f3efb | 687 | indent_p = 1; |
93ccaef0 | 688 | frame = scm_stack_ref (a->stack, scm_from_int (beg)); |
ab4f3efb MD |
689 | for (i = 0, j = 0; i < n; ++i) |
690 | { | |
691 | if (SCM_FRAME_REAL_P (frame)) | |
692 | ++j; | |
693 | if (j > SCM_BACKTRACE_INDENT) | |
694 | { | |
695 | indent_p = 0; | |
696 | break; | |
697 | } | |
698 | frame = (SCM_BACKWARDS_P | |
699 | ? SCM_FRAME_PREV (frame) | |
700 | : SCM_FRAME_NEXT (frame)); | |
701 | } | |
702 | } | |
703 | ||
704 | /* Determine size of frame number field. */ | |
93ccaef0 | 705 | j = SCM_FRAME_NUMBER (scm_stack_ref (a->stack, scm_from_int (end))); |
ab4f3efb MD |
706 | for (i = 0; j > 0; ++i) j /= 10; |
707 | nfield = i ? i : 1; | |
708 | ||
ab4f3efb | 709 | /* Print frames. */ |
93ccaef0 | 710 | frame = scm_stack_ref (a->stack, scm_from_int (beg)); |
ab4f3efb | 711 | indentation = 1; |
fec097f0 MV |
712 | last_file = SCM_UNDEFINED; |
713 | for (i = 0; i < n; ++i) | |
ab4f3efb | 714 | { |
bc36d050 | 715 | if (!scm_is_eq (SCM_PACK (SCM_SHOW_FILE_NAME), sym_base)) |
fec097f0 MV |
716 | display_backtrace_file (frame, &last_file, a->port, pstate); |
717 | ||
718 | display_frame (frame, nfield, indentation, sport, a->port, pstate); | |
ab4f3efb MD |
719 | if (indent_p && SCM_FRAME_EVAL_ARGS_P (frame)) |
720 | ++indentation; | |
fec097f0 MV |
721 | frame = (SCM_BACKWARDS_P ? |
722 | SCM_FRAME_PREV (frame) : SCM_FRAME_NEXT (frame)); | |
ab4f3efb | 723 | } |
bdf8afff | 724 | |
463b2219 ML |
725 | scm_remember_upto_here_1 (print_state); |
726 | ||
bdf8afff MD |
727 | return SCM_UNSPECIFIED; |
728 | } | |
1bbd0b84 | 729 | #undef FUNC_NAME |
bdf8afff | 730 | |
09c6d80a | 731 | SCM_DEFINE (scm_display_backtrace_with_highlights, "display-backtrace", 2, 3, 0, |
2b55be75 | 732 | (SCM stack, SCM port, SCM first, SCM depth, SCM highlights), |
b5944f66 | 733 | "Display a backtrace to the output port @var{port}. @var{stack}\n" |
c73bdd3a | 734 | "is the stack to take the backtrace from, @var{first} specifies\n" |
b5944f66 NJ |
735 | "where in the stack to start and @var{depth} how many frames\n" |
736 | "to display. @var{first} and @var{depth} can be @code{#f},\n" | |
c648c681 | 737 | "which means that default values will be used.\n" |
b5944f66 NJ |
738 | "If @var{highlights} is given it should be a list; the elements\n" |
739 | "of this list will be highlighted wherever they appear in the\n" | |
740 | "backtrace.") | |
2b55be75 | 741 | #define FUNC_NAME s_scm_display_backtrace_with_highlights |
bdf8afff | 742 | { |
0b2cb4ee MD |
743 | struct display_backtrace_args a; |
744 | struct display_error_handler_data data; | |
745 | a.stack = stack; | |
746 | a.port = port; | |
747 | a.first = first; | |
748 | a.depth = depth; | |
2b55be75 MV |
749 | if (SCM_UNBNDP (highlights)) |
750 | a.highlight_objects = SCM_EOL; | |
751 | else | |
752 | a.highlight_objects = highlights; | |
0b2cb4ee MD |
753 | data.mode = "backtrace"; |
754 | data.port = port; | |
bdf8afff | 755 | scm_internal_catch (SCM_BOOL_T, |
92c2555f MV |
756 | (scm_t_catch_body) display_backtrace_body, &a, |
757 | (scm_t_catch_handler) display_error_handler, &data); | |
ab4f3efb MD |
758 | return SCM_UNSPECIFIED; |
759 | } | |
1bbd0b84 | 760 | #undef FUNC_NAME |
ab4f3efb | 761 | |
2b55be75 MV |
762 | SCM |
763 | scm_display_backtrace (SCM stack, SCM port, SCM first, SCM depth) | |
764 | { | |
765 | return scm_display_backtrace_with_highlights (stack, port, first, depth, | |
766 | SCM_EOL); | |
767 | } | |
768 | ||
86d31dfe | 769 | SCM_VARIABLE (scm_has_shown_backtrace_hint_p_var, "has-shown-backtrace-hint?"); |
5aab5d96 | 770 | |
2b55be75 MV |
771 | SCM_DEFINE (scm_backtrace_with_highlights, "backtrace", 0, 1, 0, |
772 | (SCM highlights), | |
c73bdd3a | 773 | "Display a backtrace of the stack saved by the last error\n" |
b5944f66 NJ |
774 | "to the current output port. If @var{highlights} is given\n" |
775 | "it should be a list; the elements of this list will be\n" | |
776 | "highlighted wherever they appear in the backtrace.") | |
2b55be75 | 777 | #define FUNC_NAME s_scm_backtrace_with_highlights |
5aab5d96 | 778 | { |
9de87eea | 779 | SCM port = scm_current_output_port (); |
86d31dfe MV |
780 | SCM the_last_stack = |
781 | scm_fluid_ref (SCM_VARIABLE_REF (scm_the_last_stack_fluid_var)); | |
2b55be75 MV |
782 | |
783 | if (SCM_UNBNDP (highlights)) | |
784 | highlights = SCM_EOL; | |
785 | ||
7888309b | 786 | if (scm_is_true (the_last_stack)) |
5aab5d96 | 787 | { |
9de87eea MV |
788 | scm_newline (port); |
789 | scm_puts ("Backtrace:\n", port); | |
2b55be75 | 790 | scm_display_backtrace_with_highlights (the_last_stack, |
9de87eea | 791 | port, |
2b55be75 MV |
792 | SCM_BOOL_F, |
793 | SCM_BOOL_F, | |
794 | highlights); | |
9de87eea | 795 | scm_newline (port); |
7888309b | 796 | if (scm_is_false (SCM_VARIABLE_REF (scm_has_shown_backtrace_hint_p_var)) |
5aab5d96 MD |
797 | && !SCM_BACKTRACE_P) |
798 | { | |
b7f3516f TT |
799 | scm_puts ("Type \"(debug-enable 'backtrace)\" if you would like " |
800 | "a backtrace\n" | |
801 | "automatically if an error occurs in the future.\n", | |
9de87eea | 802 | port); |
86d31dfe | 803 | SCM_VARIABLE_SET (scm_has_shown_backtrace_hint_p_var, SCM_BOOL_T); |
5aab5d96 MD |
804 | } |
805 | } | |
806 | else | |
807 | { | |
9de87eea | 808 | scm_puts ("No backtrace available.\n", port); |
5aab5d96 MD |
809 | } |
810 | return SCM_UNSPECIFIED; | |
811 | } | |
1bbd0b84 | 812 | #undef FUNC_NAME |
5aab5d96 | 813 | |
2b55be75 MV |
814 | SCM |
815 | scm_backtrace (void) | |
816 | { | |
817 | return scm_backtrace_with_highlights (SCM_EOL); | |
818 | } | |
819 | ||
ab4f3efb MD |
820 | \f |
821 | ||
822 | void | |
823 | scm_init_backtrace () | |
824 | { | |
a5d6d578 | 825 | SCM f = scm_make_fluid (); |
86d31dfe | 826 | scm_the_last_stack_fluid_var = scm_c_define ("the-last-stack", f); |
5aab5d96 | 827 | |
a0599745 | 828 | #include "libguile/backtrace.x" |
ab4f3efb | 829 | } |
89e00824 ML |
830 | |
831 | /* | |
832 | Local Variables: | |
833 | c-file-style: "gnu" | |
834 | End: | |
835 | */ |