1 ;;;; stuff originally from CMU CL's error.lisp which can or should
2 ;;;; come late (mostly related to the CONDITION class itself)
5 ;;;; This software is part of the SBCL system. See the README file for
8 ;;;; This software is derived from the CMU CL system, which was
9 ;;;; written at Carnegie Mellon University and released into the
10 ;;;; public domain. The software is in the public domain and is
11 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
12 ;;;; files for more information.
14 (in-package "SB!KERNEL")
16 ;;;; miscellaneous support utilities
18 ;;; Signalling an error when trying to print an error condition is
19 ;;; generally a PITA, so whatever the failure encountered when
20 ;;; wondering about FILE-POSITION within a condition printer, 'tis
21 ;;; better silently to give up than to try to complain.
22 (defun file-position-or-nil-for-error (stream &optional (pos nil posp))
23 ;; Arguably FILE-POSITION shouldn't be signalling errors at all; but
24 ;; "NIL if this cannot be determined" in the ANSI spec doesn't seem
25 ;; absolutely unambiguously to prohibit errors when, e.g., STREAM
26 ;; has been closed so that FILE-POSITION is a nonsense question. So
27 ;; my (WHN) impression is that the conservative approach is to
28 ;; IGNORE-ERRORS. (I encountered this failure from within a homebrew
29 ;; defsystemish operation where the ERROR-STREAM had been CL:CLOSEd,
30 ;; I think by nonlocally exiting through a WITH-OPEN-FILE, by the
31 ;; time an error was reported.)
33 (ignore-errors (file-position stream pos))
34 (ignore-errors (file-position stream))))
36 ;;;; the CONDITION class
38 (/show0 "condition.lisp 20")
40 (eval-when (:compile-toplevel :load-toplevel :execute)
42 (/show0 "condition.lisp 24")
44 (def!struct (condition-classoid (:include classoid)
45 (:constructor make-condition-classoid))
46 ;; list of CONDITION-SLOT structures for the direct slots of this
48 (slots nil :type list)
49 ;; list of CONDITION-SLOT structures for all of the effective class
50 ;; slots of this class
51 (class-slots nil :type list)
52 ;; report function or NIL
53 (report nil :type (or function null))
54 ;; list of alternating initargs and initforms
55 (default-initargs () :type list)
56 ;; class precedence list as a list of CLASS objects, with all
57 ;; non-CONDITION classes removed
59 ;; a list of all the effective instance allocation slots of this
60 ;; class that have a non-constant initform or default-initarg.
61 ;; Values for these slots must be computed in the dynamic
62 ;; environment of MAKE-CONDITION.
63 (hairy-slots nil :type list))
65 (/show0 "condition.lisp 49")
69 (!defstruct-with-alternate-metaclass condition
70 :slot-names (actual-initargs assigned-slots)
71 :boa-constructor %make-condition-object
73 :metaclass-name condition-classoid
74 :metaclass-constructor make-condition-classoid
77 (defun make-condition-object (actual-initargs)
78 (%make-condition-object actual-initargs nil))
80 (defstruct (condition-slot (:copier nil))
81 (name (missing-arg) :type symbol)
82 ;; list of all applicable initargs
83 (initargs (missing-arg) :type list)
84 ;; names of reader and writer functions
85 (readers (missing-arg) :type list)
86 (writers (missing-arg) :type list)
87 ;; true if :INITFORM was specified
88 (initform-p (missing-arg) :type (member t nil))
89 ;; If this is a function, call it with no args. Otherwise, it's the
91 (initform (missing-arg) :type t)
92 ;; allocation of this slot, or NIL until defaulted
93 (allocation nil :type (member :instance :class nil))
94 ;; If ALLOCATION is :CLASS, this is a cons whose car holds the value.
95 (cell nil :type (or cons null))
97 (documentation nil :type (or string null)))
99 ;;; KLUDGE: It's not clear to me why CONDITION-CLASS has itself listed
100 ;;; in its CPL, while other classes derived from CONDITION-CLASS don't
101 ;;; have themselves listed in their CPLs. This behavior is inherited
102 ;;; from CMU CL, and didn't seem to be explained there, and I haven't
103 ;;; figured out whether it's right. -- WHN 19990612
104 (eval-when (:compile-toplevel :load-toplevel :execute)
105 (/show0 "condition.lisp 103")
106 (let ((condition-class (locally
107 ;; KLUDGE: There's a DEFTRANSFORM
108 ;; FIND-CLASSOID for constant class names
109 ;; which creates fast but
110 ;; non-cold-loadable, non-compact code. In
111 ;; this context, we'd rather have compact,
112 ;; cold-loadable code. -- WHN 19990928
113 (declare (notinline find-classoid))
114 (find-classoid 'condition))))
115 (setf (condition-classoid-cpl condition-class)
116 (list condition-class)))
117 (/show0 "condition.lisp 103"))
119 (setf (condition-classoid-report (locally
120 ;; KLUDGE: There's a DEFTRANSFORM
121 ;; FIND-CLASSOID for constant class
122 ;; names which creates fast but
123 ;; non-cold-loadable, non-compact
124 ;; code. In this context, we'd
125 ;; rather have compact,
126 ;; cold-loadable code. -- WHN
128 (declare (notinline find-classoid))
129 (find-classoid 'condition)))
130 (lambda (cond stream)
131 (format stream "Condition ~S was signalled." (type-of cond))))
133 (eval-when (:compile-toplevel :load-toplevel :execute)
135 (defun find-condition-layout (name parent-types)
136 (let* ((cpl (remove-duplicates
140 (condition-classoid-cpl
143 (cond-layout (info :type :compiler-layout 'condition))
144 (olayout (info :type :compiler-layout name))
145 ;; FIXME: Does this do the right thing in case of multiple
146 ;; inheritance? A quick look at DEFINE-CONDITION didn't make
147 ;; it obvious what ANSI intends to be done in the case of
148 ;; multiple inheritance, so it's not actually clear what the
151 (order-layout-inherits (concatenate 'simple-vector
152 (layout-inherits cond-layout)
153 (mapcar #'classoid-layout cpl)))))
155 (not (mismatch (layout-inherits olayout) new-inherits)))
157 (make-layout :classoid (make-undefined-classoid name)
158 :inherits new-inherits
160 :length (layout-length cond-layout)))))
164 ;;; FIXME: ANSI's definition of DEFINE-CONDITION says
165 ;;; Condition reporting is mediated through the PRINT-OBJECT method
166 ;;; for the condition type in question, with *PRINT-ESCAPE* always
167 ;;; being nil. Specifying (:REPORT REPORT-NAME) in the definition of
168 ;;; a condition type C is equivalent to:
169 ;;; (defmethod print-object ((x c) stream)
170 ;;; (if *print-escape* (call-next-method) (report-name x stream)))
171 ;;; The current code doesn't seem to quite match that.
172 (def!method print-object ((x condition) stream)
174 (print-unreadable-object (x stream :type t :identity t))
175 ;; KLUDGE: A comment from CMU CL here said
176 ;; 7/13/98 BUG? CPL is not sorted and results here depend on order of
177 ;; superclasses in define-condition call!
178 (dolist (class (condition-classoid-cpl (classoid-of x))
179 (error "no REPORT? shouldn't happen!"))
180 (let ((report (condition-classoid-report class)))
182 (return (funcall report x stream)))))))
184 ;;;; slots of CONDITION objects
186 (defvar *empty-condition-slot* '(empty))
188 (defun find-slot-default (class slot)
189 (let ((initargs (condition-slot-initargs slot))
190 (cpl (condition-classoid-cpl class)))
192 (let ((default-initargs (condition-classoid-default-initargs class)))
193 (dolist (initarg initargs)
194 (let ((val (getf default-initargs initarg *empty-condition-slot*)))
195 (unless (eq val *empty-condition-slot*)
196 (return-from find-slot-default
201 (if (condition-slot-initform-p slot)
202 (let ((initform (condition-slot-initform slot)))
203 (if (functionp initform)
206 (error "unbound condition slot: ~S" (condition-slot-name slot)))))
208 (defun find-condition-class-slot (condition-class slot-name)
210 (condition-classoid-cpl condition-class)
211 (error "There is no slot named ~S in ~S."
212 slot-name condition-class))
213 (dolist (slot (condition-classoid-slots sclass))
214 (when (eq (condition-slot-name slot) slot-name)
215 (return-from find-condition-class-slot slot)))))
217 (defun condition-writer-function (condition new-value name)
218 (dolist (cslot (condition-classoid-class-slots
219 (layout-classoid (%instance-layout condition)))
220 (setf (getf (condition-assigned-slots condition) name)
222 (when (eq (condition-slot-name cslot) name)
223 (return (setf (car (condition-slot-cell cslot)) new-value)))))
225 (defun condition-reader-function (condition name)
226 (let ((class (layout-classoid (%instance-layout condition))))
227 (dolist (cslot (condition-classoid-class-slots class))
228 (when (eq (condition-slot-name cslot) name)
229 (return-from condition-reader-function
230 (car (condition-slot-cell cslot)))))
231 (let ((val (getf (condition-assigned-slots condition) name
232 *empty-condition-slot*)))
233 (if (eq val *empty-condition-slot*)
234 (let ((actual-initargs (condition-actual-initargs condition))
235 (slot (find-condition-class-slot class name)))
237 (error "missing slot ~S of ~S" name condition))
238 (do ((initargs actual-initargs (cddr initargs)))
240 (setf (getf (condition-assigned-slots condition) name)
241 (find-slot-default class slot)))
242 (when (member (car initargs) (condition-slot-initargs slot))
243 (return-from condition-reader-function
244 (setf (getf (condition-assigned-slots condition)
251 (defun make-condition (type &rest args)
253 "Make an instance of a condition object using the specified initargs."
254 ;; Note: ANSI specifies no exceptional situations in this function.
255 ;; signalling simple-type-error would not be wrong.
256 (let* ((type (or (and (symbolp type) (find-classoid type nil))
258 (class (typecase type
259 (condition-classoid type)
262 (return-from make-condition (apply #'make-instance type args)))
264 (error 'simple-type-error
266 :expected-type 'condition-class
267 :format-control "~S is not a condition class."
268 :format-arguments (list type)))
270 (error 'simple-type-error
272 :expected-type 'condition-class
273 :format-control "Bad type argument:~% ~S"
274 :format-arguments (list type)))))
275 (res (make-condition-object args)))
276 (setf (%instance-layout res) (classoid-layout class))
277 ;; Set any class slots with initargs present in this call.
278 (dolist (cslot (condition-classoid-class-slots class))
279 (dolist (initarg (condition-slot-initargs cslot))
280 (let ((val (getf args initarg *empty-condition-slot*)))
281 (unless (eq val *empty-condition-slot*)
282 (setf (car (condition-slot-cell cslot)) val)))))
283 ;; Default any slots with non-constant defaults now.
284 (dolist (hslot (condition-classoid-hairy-slots class))
285 (when (dolist (initarg (condition-slot-initargs hslot) t)
286 (unless (eq (getf args initarg *empty-condition-slot*)
287 *empty-condition-slot*)
289 (setf (getf (condition-assigned-slots res) (condition-slot-name hslot))
290 (find-slot-default class hslot))))
293 ;;;; DEFINE-CONDITION
295 (eval-when (:compile-toplevel :load-toplevel :execute)
296 (defun %compiler-define-condition (name direct-supers layout
297 all-readers all-writers)
298 (with-single-package-locked-error
299 (:symbol name "defining ~A as a condition")
300 (sb!xc:proclaim `(ftype (function (t) t) ,@all-readers))
301 (sb!xc:proclaim `(ftype (function (t t) t) ,@all-writers))
302 (multiple-value-bind (class old-layout)
303 (insured-find-classoid name
304 #'condition-classoid-p
305 #'make-condition-classoid)
306 (setf (layout-classoid layout) class)
307 (setf (classoid-direct-superclasses class)
308 (mapcar #'find-classoid direct-supers))
309 (cond ((not old-layout)
310 (register-layout layout))
311 ((not *type-system-initialized*)
312 (setf (layout-classoid old-layout) class)
313 (setq layout old-layout)
314 (unless (eq (classoid-layout class) layout)
315 (register-layout layout)))
316 ((redefine-layout-warning "current"
319 (layout-length layout)
320 (layout-inherits layout)
321 (layout-depthoid layout)
322 (layout-n-untagged-slots layout))
323 (register-layout layout :invalidate t))
324 ((not (classoid-layout class))
325 (register-layout layout)))
327 (setf (layout-info layout)
329 ;; KLUDGE: There's a FIND-CLASS DEFTRANSFORM for constant class
330 ;; names which creates fast but non-cold-loadable, non-compact
331 ;; code. In this context, we'd rather have compact, cold-loadable
332 ;; code. -- WHN 19990928
333 (declare (notinline find-classoid))
334 (layout-info (classoid-layout (find-classoid 'condition)))))
336 (setf (find-classoid name) class)
338 ;; Initialize CPL slot.
339 (setf (condition-classoid-cpl class)
340 (remove-if-not #'condition-classoid-p
341 (std-compute-class-precedence-list class)))))
345 ;;; Compute the effective slots of CLASS, copying inherited slots and
346 ;;; destructively modifying direct slots.
348 ;;; FIXME: It'd be nice to explain why it's OK to destructively modify
349 ;;; direct slots. Presumably it follows from the semantics of
350 ;;; inheritance and redefinition of conditions, but finding the cite
351 ;;; and documenting it here would be good. (Or, if this is not in fact
352 ;;; ANSI-compliant, fixing it would also be good.:-)
353 (defun compute-effective-slots (class)
354 (collect ((res (copy-list (condition-classoid-slots class))))
355 (dolist (sclass (cdr (condition-classoid-cpl class)))
356 (dolist (sslot (condition-classoid-slots sclass))
357 (let ((found (find (condition-slot-name sslot) (res)
358 :key #'condition-slot-name)))
360 (setf (condition-slot-initargs found)
361 (union (condition-slot-initargs found)
362 (condition-slot-initargs sslot)))
363 (unless (condition-slot-initform-p found)
364 (setf (condition-slot-initform-p found)
365 (condition-slot-initform-p sslot))
366 (setf (condition-slot-initform found)
367 (condition-slot-initform sslot)))
368 (unless (condition-slot-allocation found)
369 (setf (condition-slot-allocation found)
370 (condition-slot-allocation sslot))))
372 (res (copy-structure sslot)))))))
375 ;;; Early definitions of slot accessor creators.
377 ;;; Slot accessors must be generic functions, but ANSI does not seem
378 ;;; to specify any of them, and we cannot support it before end of
379 ;;; warm init. So we use ordinary functions inside SBCL, and switch to
380 ;;; GFs only at the end of building.
381 (declaim (notinline install-condition-slot-reader
382 install-condition-slot-writer))
383 (defun install-condition-slot-reader (name condition slot-name)
384 (declare (ignore condition))
385 (setf (fdefinition name)
387 (condition-reader-function condition slot-name))))
388 (defun install-condition-slot-writer (name condition slot-name)
389 (declare (ignore condition))
390 (setf (fdefinition name)
391 (lambda (new-value condition)
392 (condition-writer-function condition new-value slot-name))))
394 (defvar *define-condition-hooks* nil)
396 (defun %define-condition (name parent-types layout slots documentation
397 report default-initargs all-readers all-writers
399 (with-single-package-locked-error
400 (:symbol name "defining ~A as a condition")
401 (%compiler-define-condition name parent-types layout all-readers all-writers)
402 (sb!c:with-source-location (source-location)
403 (setf (layout-source-location layout)
405 (let ((class (find-classoid name)))
406 (setf (condition-classoid-slots class) slots)
407 (setf (condition-classoid-report class) report)
408 (setf (condition-classoid-default-initargs class) default-initargs)
409 (setf (fdocumentation name 'type) documentation)
413 ;; Set up reader and writer functions.
414 (let ((slot-name (condition-slot-name slot)))
415 (dolist (reader (condition-slot-readers slot))
416 (install-condition-slot-reader reader name slot-name))
417 (dolist (writer (condition-slot-writers slot))
418 (install-condition-slot-writer writer name slot-name))))
420 ;; Compute effective slots and set up the class and hairy slots
421 ;; (subsets of the effective slots.)
422 (let ((eslots (compute-effective-slots class))
425 (mapcar #'condition-classoid-default-initargs
426 (condition-classoid-cpl class)))))
427 (dolist (slot eslots)
428 (ecase (condition-slot-allocation slot)
430 (unless (condition-slot-cell slot)
431 (setf (condition-slot-cell slot)
432 (list (if (condition-slot-initform-p slot)
433 (let ((initform (condition-slot-initform slot)))
434 (if (functionp initform)
437 *empty-condition-slot*))))
438 (push slot (condition-classoid-class-slots class)))
440 (setf (condition-slot-allocation slot) :instance)
441 (when (or (functionp (condition-slot-initform slot))
442 (dolist (initarg (condition-slot-initargs slot) nil)
443 (when (functionp (getf e-def-initargs initarg))
445 (push slot (condition-classoid-hairy-slots class)))))))
446 (when (boundp '*define-condition-hooks*)
447 (dolist (fun *define-condition-hooks*)
448 (funcall fun class))))
451 (defmacro define-condition (name (&rest parent-types) (&rest slot-specs)
454 "DEFINE-CONDITION Name (Parent-Type*) (Slot-Spec*) Option*
455 Define NAME as a condition type. This new type inherits slots and its
456 report function from the specified PARENT-TYPEs. A slot spec is a list of:
457 (slot-name :reader <rname> :initarg <iname> {Option Value}*
459 The DEFINE-CLASS slot options :ALLOCATION, :INITFORM, [slot] :DOCUMENTATION
460 and :TYPE and the overall options :DEFAULT-INITARGS and
461 [type] :DOCUMENTATION are also allowed.
463 The :REPORT option is peculiar to DEFINE-CONDITION. Its argument is either
464 a string or a two-argument lambda or function name. If a function, the
465 function is called with the condition and stream to report the condition.
466 If a string, the string is printed.
468 Condition types are classes, but (as allowed by ANSI and not as described in
469 CLtL2) are neither STANDARD-OBJECTs nor STRUCTURE-OBJECTs. WITH-SLOTS and
470 SLOT-VALUE may not be used on condition objects."
471 (let* ((parent-types (or parent-types '(condition)))
472 (layout (find-condition-layout name parent-types))
475 (default-initargs ()))
477 (all-readers nil append)
478 (all-writers nil append))
479 (dolist (spec slot-specs)
480 (when (keywordp spec)
481 (warn "Keyword slot name indicates probable syntax error:~% ~S"
483 (let* ((spec (if (consp spec) spec (list spec)))
484 (slot-name (first spec))
485 (allocation :instance)
492 (do ((options (rest spec) (cddr options)))
494 (unless (and (consp options) (consp (cdr options)))
495 (error "malformed condition slot spec:~% ~S." spec))
496 (let ((arg (second options)))
497 (case (first options)
498 (:reader (readers arg))
499 (:writer (writers arg))
502 (writers `(setf ,arg)))
505 (error "more than one :INITFORM in ~S" spec))
508 (:initarg (initargs arg))
510 (setq allocation arg))
513 (error "more than one :DOCUMENTATION in ~S" spec))
514 (unless (stringp arg)
515 (error "slot :DOCUMENTATION argument is not a string: ~S"
517 (setq documentation arg))
520 (error "unknown slot option:~% ~S" (first options))))))
522 (all-readers (readers))
523 (all-writers (writers))
524 (slots `(make-condition-slot
526 :initargs ',(initargs)
529 :initform-p ',initform-p
530 :documentation ',documentation
532 ,(if (sb!xc:constantp initform)
533 `',(constant-form-value initform)
534 `#'(lambda () ,initform)))))))
536 (dolist (option options)
537 (unless (consp option)
538 (error "bad option:~% ~S" option))
540 (:documentation (setq documentation (second option)))
542 (let ((arg (second option)))
545 `#'(lambda (condition stream)
546 (declare (ignore condition))
547 (write-string ,arg stream))
548 `#'(lambda (condition stream)
549 (funcall #',arg condition stream))))))
551 (do ((initargs (rest option) (cddr initargs)))
553 (let ((val (second initargs)))
554 (setq default-initargs
555 (list* `',(first initargs)
556 (if (sb!xc:constantp val)
557 `',(constant-form-value val)
559 default-initargs)))))
561 (error "unknown option: ~S" (first option)))))
564 (eval-when (:compile-toplevel)
565 (%compiler-define-condition ',name ',parent-types ',layout
566 ',(all-readers) ',(all-writers)))
567 (eval-when (:load-toplevel :execute)
568 (%define-condition ',name
574 (list ,@default-initargs)
577 (sb!c:source-location)))))))
579 ;;;; DESCRIBE on CONDITIONs
581 ;;; a function to be used as the guts of DESCRIBE-OBJECT (CONDITION T)
582 ;;; eventually (once we get CLOS up and running so that we can define
584 (defun describe-condition (condition stream)
586 "~&~@<~S ~_is a ~S. ~_Its slot values are ~_~S.~:>~%"
590 (condition-actual-initargs condition)
591 (condition-assigned-slots condition))))
593 ;;;; various CONDITIONs specified by ANSI
595 (define-condition serious-condition (condition) ())
597 (define-condition error (serious-condition) ())
599 (define-condition warning (condition) ())
600 (define-condition style-warning (warning) ())
602 (defun simple-condition-printer (condition stream)
605 (simple-condition-format-control condition)
606 (simple-condition-format-arguments condition)))
608 (define-condition simple-condition ()
609 ((format-control :reader simple-condition-format-control
610 :initarg :format-control
611 :type format-control)
612 (format-arguments :reader simple-condition-format-arguments
613 :initarg :format-arguments
616 (:report simple-condition-printer))
618 (define-condition simple-warning (simple-condition warning) ())
620 (define-condition simple-error (simple-condition error) ())
622 ;;; not specified by ANSI, but too useful not to have around.
623 (define-condition simple-style-warning (simple-condition style-warning) ())
625 (define-condition storage-condition (serious-condition) ())
627 (define-condition type-error (error)
628 ((datum :reader type-error-datum :initarg :datum)
629 (expected-type :reader type-error-expected-type :initarg :expected-type))
631 (lambda (condition stream)
633 "~@<The value ~2I~:_~S ~I~_is not of type ~2I~_~S.~:>"
634 (type-error-datum condition)
635 (type-error-expected-type condition)))))
637 (define-condition simple-type-error (simple-condition type-error) ())
639 (define-condition program-error (error) ())
640 (define-condition parse-error (error) ())
641 (define-condition control-error (error) ())
642 (define-condition stream-error (error)
643 ((stream :reader stream-error-stream :initarg :stream)))
645 (define-condition end-of-file (stream-error) ()
647 (lambda (condition stream)
650 (stream-error-stream condition)))))
652 (define-condition file-error (error)
653 ((pathname :reader file-error-pathname :initarg :pathname))
655 (lambda (condition stream)
656 (format stream "error on file ~S" (file-error-pathname condition)))))
658 (define-condition package-error (error)
659 ((package :reader package-error-package :initarg :package)))
661 (define-condition cell-error (error)
662 ((name :reader cell-error-name :initarg :name)))
664 (def!method print-object ((condition cell-error) stream)
665 (if (and *print-escape* (slot-boundp condition 'name))
666 (print-unreadable-object (condition stream :type t :identity t)
667 (princ (cell-error-name condition) stream))
670 (define-condition unbound-variable (cell-error) ()
672 (lambda (condition stream)
674 "The variable ~S is unbound."
675 (cell-error-name condition)))))
677 (define-condition undefined-function (cell-error) ()
679 (lambda (condition stream)
681 "The function ~S is undefined."
682 (cell-error-name condition)))))
684 (define-condition special-form-function (undefined-function) ()
686 (lambda (condition stream)
688 "Cannot FUNCALL the SYMBOL-FUNCTION of special operator ~S."
689 (cell-error-name condition)))))
691 (define-condition arithmetic-error (error)
692 ((operation :reader arithmetic-error-operation
695 (operands :reader arithmetic-error-operands
697 (:report (lambda (condition stream)
699 "arithmetic error ~S signalled"
701 (when (arithmetic-error-operation condition)
703 "~%Operation was ~S, operands ~S."
704 (arithmetic-error-operation condition)
705 (arithmetic-error-operands condition))))))
707 (define-condition division-by-zero (arithmetic-error) ())
708 (define-condition floating-point-overflow (arithmetic-error) ())
709 (define-condition floating-point-underflow (arithmetic-error) ())
710 (define-condition floating-point-inexact (arithmetic-error) ())
711 (define-condition floating-point-invalid-operation (arithmetic-error) ())
713 (define-condition print-not-readable (error)
714 ((object :reader print-not-readable-object :initarg :object))
716 (lambda (condition stream)
717 (let ((obj (print-not-readable-object condition))
719 (format stream "~S cannot be printed readably." obj)))))
721 (define-condition reader-error (parse-error stream-error)
723 :reader reader-error-format-control
724 :initarg :format-control)
726 :reader reader-error-format-arguments
727 :initarg :format-arguments
730 (lambda (condition stream)
731 (let* ((error-stream (stream-error-stream condition))
732 (pos (file-position-or-nil-for-error error-stream)))
735 (< pos sb!xc:array-dimension-limit)
736 ;; KLUDGE: lseek() (which is what FILE-POSITION
737 ;; reduces to on file-streams) is undefined on
738 ;; "some devices", which in practice means that it
739 ;; can claim to succeed on /dev/stdin on Darwin
740 ;; and Solaris. This is obviously bad news,
741 ;; because the READ-SEQUENCE below will then
742 ;; block, not complete, and the report will never
743 ;; be printed. As a workaround, we exclude
744 ;; interactive streams from this attempt to report
745 ;; positions. -- CSR, 2003-08-21
746 (not (interactive-stream-p error-stream))
747 (file-position error-stream :start))
750 :element-type (stream-element-type
752 (when (= pos (read-sequence string error-stream))
753 (setq lineno (1+ (count #\Newline string))
755 (or (position #\Newline string :from-end t) -1)
757 (file-position-or-nil-for-error error-stream pos))
758 (pprint-logical-block (stream nil)
760 "READER-ERROR ~@[at ~W ~]~
761 ~@[(line ~W~]~@[, column ~W) ~]~
763 pos lineno colno error-stream
764 (reader-error-format-control condition)
765 (reader-error-format-arguments condition))))))))
767 ;;;; special SBCL extension conditions
769 ;;; an error apparently caused by a bug in SBCL itself
771 ;;; Note that we don't make any serious effort to use this condition
772 ;;; for *all* errors in SBCL itself. E.g. type errors and array
773 ;;; indexing errors can occur in functions called from SBCL code, and
774 ;;; will just end up as ordinary TYPE-ERROR or invalid index error,
775 ;;; because the signalling code has no good way to know that the
776 ;;; underlying problem is a bug in SBCL. But in the fairly common case
777 ;;; that the signalling code does know that it's found a bug in SBCL,
778 ;;; this condition is appropriate, reusing boilerplate and helping
779 ;;; users to recognize it as an SBCL bug.
780 (define-condition bug (simple-error)
783 (lambda (condition stream)
786 (simple-condition-format-control condition)
787 (simple-condition-format-arguments condition)
788 "~@<This is probably a bug in SBCL itself. (Alternatively, ~
789 SBCL might have been corrupted by bad user code, e.g. by an ~
790 undefined Lisp operation like ~S, or by stray pointers from ~
791 alien code or from unsafe Lisp code; or there might be a bug ~
792 in the OS or hardware that SBCL is running on.) If it seems to ~
793 be a bug in SBCL itself, the maintainers would like to know ~
794 about it. Bug reports are welcome on the SBCL ~
795 mailing lists, which you can find at ~
796 <http://sbcl.sourceforge.net/>.~:@>"
797 '((fmakunbound 'compile))))))
799 (define-condition simple-storage-condition (storage-condition simple-condition) ())
801 ;;; a condition for use in stubs for operations which aren't supported
802 ;;; on some platforms
804 ;;; E.g. in sbcl-0.7.0.5, it might be appropriate to do something like
805 ;;; #-(or freebsd linux)
806 ;;; (defun load-foreign (&rest rest)
807 ;;; (error 'unsupported-operator :name 'load-foreign))
808 ;;; #+(or freebsd linux)
809 ;;; (defun load-foreign ... actual definition ...)
810 ;;; By signalling a standard condition in this case, we make it
811 ;;; possible for test code to distinguish between (1) intentionally
812 ;;; unimplemented and (2) unintentionally just screwed up somehow.
813 ;;; (Before this condition was defined, test code tried to deal with
814 ;;; this by checking for FBOUNDP, but that didn't work reliably. In
815 ;;; sbcl-0.7.0, a package screwup left the definition of
816 ;;; LOAD-FOREIGN in the wrong package, so it was unFBOUNDP even on
817 ;;; architectures where it was supposed to be supported, and the
818 ;;; regression tests cheerfully passed because they assumed that
819 ;;; unFBOUNDPness meant they were running on an system which didn't
820 ;;; support the extension.)
821 (define-condition unsupported-operator (simple-error) ())
824 ;;; (:ansi-cl :function remove)
825 ;;; (:ansi-cl :section (a b c))
826 ;;; (:ansi-cl :glossary "similar")
828 ;;; (:sbcl :node "...")
829 ;;; (:sbcl :variable *ed-functions*)
831 ;;; FIXME: this is not the right place for this.
832 (defun print-reference (reference stream)
833 (ecase (car reference)
835 (format stream "AMOP")
837 (destructuring-bind (type data) (cdr reference)
839 (:readers "Readers for ~:(~A~) Metaobjects"
840 (substitute #\ #\- (symbol-name data)))
842 (format stream "Initialization of ~:(~A~) Metaobjects"
843 (substitute #\ #\- (symbol-name data))))
844 (:generic-function (format stream "Generic Function ~S" data))
845 (:function (format stream "Function ~S" data))
846 (:section (format stream "Section ~{~D~^.~}" data)))))
848 (format stream "The ANSI Standard")
850 (destructuring-bind (type data) (cdr reference)
852 (:function (format stream "Function ~S" data))
853 (:special-operator (format stream "Special Operator ~S" data))
854 (:macro (format stream "Macro ~S" data))
855 (:section (format stream "Section ~{~D~^.~}" data))
856 (:glossary (format stream "Glossary entry for ~S" data))
857 (:issue (format stream "writeup for Issue ~A" data)))))
859 (format stream "The SBCL Manual")
861 (destructuring-bind (type data) (cdr reference)
863 (:node (format stream "Node ~S" data))
864 (:variable (format stream "Variable ~S" data))
865 (:function (format stream "Function ~S" data)))))
866 ;; FIXME: other documents (e.g. CLIM, Franz documentation :-)
868 (define-condition reference-condition ()
869 ((references :initarg :references :reader reference-condition-references)))
870 (defvar *print-condition-references* t)
871 (def!method print-object :around ((o reference-condition) s)
873 (unless (or *print-escape* *print-readably*)
874 (when (and *print-condition-references*
875 (reference-condition-references o))
876 (format s "~&See also:~%")
877 (pprint-logical-block (s nil :per-line-prefix " ")
878 (do* ((rs (reference-condition-references o) (cdr rs))
879 (r (car rs) (car rs)))
881 (print-reference r s)
882 (unless (null (cdr rs))
885 (define-condition duplicate-definition (reference-condition warning)
886 ((name :initarg :name :reader duplicate-definition-name))
887 (:report (lambda (c s)
888 (format s "~@<Duplicate definition for ~S found in ~
890 (duplicate-definition-name c))))
891 (:default-initargs :references (list '(:ansi-cl :section (3 2 2 3)))))
893 (define-condition constant-modified (reference-condition warning)
894 ((fun-name :initarg :fun-name :reader constant-modified-fun-name))
895 (:report (lambda (c s)
896 (format s "~@<Destructive function ~S called on ~
898 (constant-modified-fun-name c))))
899 (:default-initargs :references (list '(:ansi-cl :special-operator quote)
900 '(:ansi-cl :section (3 2 2 3)))))
902 (define-condition package-at-variance (reference-condition simple-warning)
904 (:default-initargs :references (list '(:ansi-cl :macro defpackage))))
906 (define-condition defconstant-uneql (reference-condition error)
907 ((name :initarg :name :reader defconstant-uneql-name)
908 (old-value :initarg :old-value :reader defconstant-uneql-old-value)
909 (new-value :initarg :new-value :reader defconstant-uneql-new-value))
911 (lambda (condition stream)
913 "~@<The constant ~S is being redefined (from ~S to ~S)~@:>"
914 (defconstant-uneql-name condition)
915 (defconstant-uneql-old-value condition)
916 (defconstant-uneql-new-value condition))))
917 (:default-initargs :references (list '(:ansi-cl :macro defconstant)
918 '(:sbcl :node "Idiosyncrasies"))))
920 (define-condition array-initial-element-mismatch
921 (reference-condition simple-warning)
925 '(:ansi-cl :function make-array)
926 '(:ansi-cl :function sb!xc:upgraded-array-element-type))))
928 (define-condition displaced-to-array-too-small-error
929 (reference-condition simple-error)
932 :references (list '(:ansi-cl :function adjust-array))))
934 (define-condition type-warning (reference-condition simple-warning)
936 (:default-initargs :references (list '(:sbcl :node "Handling of Types"))))
938 (define-condition local-argument-mismatch (reference-condition simple-warning)
940 (:default-initargs :references (list '(:ansi-cl :section (3 2 2 3)))))
942 (define-condition format-args-mismatch (reference-condition)
944 (:default-initargs :references (list '(:ansi-cl :section (22 3 10 2)))))
946 (define-condition format-too-few-args-warning
947 (format-args-mismatch simple-warning)
949 (define-condition format-too-many-args-warning
950 (format-args-mismatch simple-style-warning)
953 (define-condition extension-failure (reference-condition simple-error)
956 (define-condition structure-initarg-not-keyword
957 (reference-condition simple-style-warning)
959 (:default-initargs :references (list '(:ansi-cl :section (2 4 8 13)))))
964 (define-condition package-lock-violation (reference-condition package-error)
965 ((format-control :initform nil :initarg :format-control
966 :reader package-error-format-control)
967 (format-arguments :initform nil :initarg :format-arguments
968 :reader package-error-format-arguments))
970 (lambda (condition stream)
971 (let ((control (package-error-format-control condition)))
973 (apply #'format stream
974 (format nil "~~@<Lock on package ~A violated when ~A.~~:@>"
975 (package-name (package-error-package condition))
977 (package-error-format-arguments condition))
978 (format stream "~@<Lock on package ~A violated.~:@>"
979 (package-name (package-error-package condition)))))))
980 ;; no :default-initargs -- reference-stuff provided by the
981 ;; signalling form in target-package.lisp
984 "Subtype of CL:PACKAGE-ERROR. A subtype of this error is signalled
985 when a package-lock is violated."))
987 (define-condition package-locked-error (package-lock-violation) ()
990 "Subtype of SB-EXT:PACKAGE-LOCK-VIOLATION. An error of this type is
991 signalled when an operation on a package violates a package lock."))
993 (define-condition symbol-package-locked-error (package-lock-violation)
994 ((symbol :initarg :symbol :reader package-locked-error-symbol))
997 "Subtype of SB-EXT:PACKAGE-LOCK-VIOLATION. An error of this type is
998 signalled when an operation on a symbol violates a package lock. The
999 symbol that caused the violation is accessed by the function
1000 SB-EXT:PACKAGE-LOCKED-ERROR-SYMBOL."))
1004 (define-condition undefined-alien-error (cell-error) ()
1006 (lambda (condition stream)
1007 (if (slot-boundp condition 'name)
1008 (format stream "Undefined alien: ~S" (cell-error-name condition))
1009 (format stream "Undefined alien symbol.")))))
1011 (define-condition undefined-alien-variable-error (undefined-alien-error) ()
1013 (lambda (condition stream)
1014 (declare (ignore condition))
1015 (format stream "Attempt to access an undefined alien variable."))))
1017 (define-condition undefined-alien-function-error (undefined-alien-error) ()
1019 (lambda (condition stream)
1020 (declare (ignore condition))
1021 (format stream "Attempt to call an undefined alien function."))))
1024 ;;;; various other (not specified by ANSI) CONDITIONs
1026 ;;;; These might logically belong in other files; they're here, after
1027 ;;;; setup of CONDITION machinery, only because that makes it easier to
1028 ;;;; get cold init to work.
1030 ;;; OAOOM warning: see cross-condition.lisp
1031 (define-condition encapsulated-condition (condition)
1032 ((condition :initarg :condition :reader encapsulated-condition)))
1034 (define-condition values-type-error (type-error)
1037 (lambda (condition stream)
1039 "~@<The values set ~2I~:_[~{~S~^ ~}] ~I~_is not of type ~2I~_~S.~:>"
1040 (type-error-datum condition)
1041 (type-error-expected-type condition)))))
1043 ;;; KLUDGE: a condition for floating point errors when we can't or
1044 ;;; won't figure out what type they are. (In FreeBSD and OpenBSD we
1045 ;;; don't know how, at least as of sbcl-0.6.7; in Linux we probably
1046 ;;; know how but the old code was broken by the conversion to POSIX
1047 ;;; signal handling and hasn't been fixed as of sbcl-0.6.7.)
1049 ;;; FIXME: Perhaps this should also be a base class for all
1050 ;;; floating point exceptions?
1051 (define-condition floating-point-exception (arithmetic-error)
1052 ((flags :initarg :traps
1054 :reader floating-point-exception-traps))
1055 (:report (lambda (condition stream)
1057 "An arithmetic error ~S was signalled.~%"
1058 (type-of condition))
1059 (let ((traps (floating-point-exception-traps condition)))
1062 "Trapping conditions are: ~%~{ ~S~^~}~%"
1065 "No traps are enabled? How can this be?"
1068 (define-condition index-too-large-error (type-error)
1071 (lambda (condition stream)
1073 "The index ~S is too large."
1074 (type-error-datum condition)))))
1076 (define-condition bounding-indices-bad-error (reference-condition type-error)
1077 ((object :reader bounding-indices-bad-object :initarg :object))
1079 (lambda (condition stream)
1080 (let* ((datum (type-error-datum condition))
1083 (object (bounding-indices-bad-object condition)))
1087 "The bounding indices ~S and ~S are bad ~
1088 for a sequence of length ~S."
1089 start end (length object)))
1091 ;; from WITH-ARRAY-DATA
1093 "The START and END parameters ~S and ~S are ~
1094 bad for an array of total size ~S."
1095 start end (array-total-size object)))))))
1098 (list '(:ansi-cl :glossary "bounding index designator")
1099 '(:ansi-cl :issue "SUBSEQ-OUT-OF-BOUNDS:IS-AN-ERROR"))))
1101 (define-condition nil-array-accessed-error (reference-condition type-error)
1103 (:report (lambda (condition stream)
1104 (declare (ignore condition))
1106 "An attempt to access an array of element-type ~
1107 NIL was made. Congratulations!")))
1109 :references (list '(:ansi-cl :function sb!xc:upgraded-array-element-type)
1110 '(:ansi-cl :section (15 1 2 1))
1111 '(:ansi-cl :section (15 1 2 2)))))
1113 (define-condition namestring-parse-error (parse-error)
1114 ((complaint :reader namestring-parse-error-complaint :initarg :complaint)
1115 (args :reader namestring-parse-error-args :initarg :args :initform nil)
1116 (namestring :reader namestring-parse-error-namestring :initarg :namestring)
1117 (offset :reader namestring-parse-error-offset :initarg :offset))
1119 (lambda (condition stream)
1121 "parse error in namestring: ~?~% ~A~% ~V@T^"
1122 (namestring-parse-error-complaint condition)
1123 (namestring-parse-error-args condition)
1124 (namestring-parse-error-namestring condition)
1125 (namestring-parse-error-offset condition)))))
1127 (define-condition simple-package-error (simple-condition package-error) ())
1129 (define-condition reader-package-error (reader-error) ())
1131 (define-condition reader-eof-error (end-of-file)
1132 ((context :reader reader-eof-error-context :initarg :context))
1134 (lambda (condition stream)
1136 "unexpected end of file on ~S ~A"
1137 (stream-error-stream condition)
1138 (reader-eof-error-context condition)))))
1140 (define-condition reader-impossible-number-error (reader-error)
1141 ((error :reader reader-impossible-number-error-error :initarg :error))
1143 (lambda (condition stream)
1144 (let ((error-stream (stream-error-stream condition)))
1145 (format stream "READER-ERROR ~@[at ~W ~]on ~S:~%~?~%Original error: ~A"
1146 (file-position-or-nil-for-error error-stream) error-stream
1147 (reader-error-format-control condition)
1148 (reader-error-format-arguments condition)
1149 (reader-impossible-number-error-error condition))))))
1151 (define-condition timeout (serious-condition)
1152 ((seconds :initarg :seconds :initform nil :reader timeout-seconds))
1153 (:report (lambda (condition stream)
1154 (format stream "Timeout occurred~@[ after ~A seconds~]."
1155 (timeout-seconds condition)))))
1157 (define-condition io-timeout (stream-error timeout)
1158 ((direction :reader io-timeout-direction :initarg :direction))
1160 (lambda (condition stream)
1161 (declare (type stream stream))
1163 "I/O timeout ~(~A~)ing ~S."
1164 (io-timeout-direction condition)
1165 (stream-error-stream condition)))))
1167 (define-condition deadline-timeout (timeout) ()
1168 (:report (lambda (condition stream)
1169 (format stream "A deadline was reached after ~A seconds."
1170 (timeout-seconds condition)))))
1172 (define-condition declaration-type-conflict-error (reference-condition
1176 :format-control "symbol ~S cannot be both the name of a type and the name of a declaration"
1177 :references (list '(:ansi-cl :section (3 8 21)))))
1179 ;;; Single stepping conditions
1181 (define-condition step-condition ()
1182 ((form :initarg :form :reader step-condition-form))
1185 (:documentation "Common base class of single-stepping conditions.
1186 STEP-CONDITION-FORM holds a string representation of the form being
1190 (setf (fdocumentation 'step-condition-form 'function)
1191 "Form associated with the STEP-CONDITION.")
1193 (define-condition step-form-condition (step-condition)
1194 ((args :initarg :args :reader step-condition-args))
1196 (lambda (condition stream)
1197 (let ((*print-circle* t)
1199 (*print-readably* nil))
1201 "Evaluating call:~%~< ~@;~A~:>~%~
1202 ~:[With arguments:~%~{ ~S~%~}~;With unknown arguments~]~%"
1203 (list (step-condition-form condition))
1204 (eq (step-condition-args condition) :unknown)
1205 (step-condition-args condition)))))
1207 (:documentation "Condition signalled by code compiled with
1208 single-stepping information when about to execute a form.
1209 STEP-CONDITION-FORM holds the form, STEP-CONDITION-PATHNAME holds the
1210 pathname of the original file or NIL, and STEP-CONDITION-SOURCE-PATH
1211 holds the source-path to the original form within that file or NIL.
1212 Associated with this condition are always the restarts STEP-INTO,
1213 STEP-NEXT, and STEP-CONTINUE."))
1216 (setf (fdocumentation 'step-condition-source-path 'function)
1217 "Source-path of the original form associated with the
1218 STEP-FORM-CONDITION or NIL."
1219 (fdocumentation 'step-condition-pathname 'function)
1220 "Pathname of the original source-file associated with the
1221 STEP-FORM-CONDITION or NIL.")
1223 (define-condition step-result-condition (step-condition)
1224 ((result :initarg :result :reader step-condition-result)))
1227 (setf (fdocumentation 'step-condition-result 'function)
1228 "Return values associated with STEP-VALUES-CONDITION as a list,
1229 or the variable value associated with STEP-VARIABLE-CONDITION.")
1231 (define-condition step-values-condition (step-result-condition)
1234 (:documentation "Condition signalled by code compiled with
1235 single-stepping information after executing a form.
1236 STEP-CONDITION-FORM holds the form, and STEP-CONDITION-RESULT holds
1237 the values returned by the form as a list. No associated restarts."))
1239 (define-condition step-finished-condition (step-condition)
1242 (lambda (condition stream)
1243 (declare (ignore condition))
1244 (format stream "Returning from STEP")))
1246 (:documentation "Condition signaled when STEP returns."))
1249 ;;;; restart definitions
1251 (define-condition abort-failure (control-error) ()
1253 "An ABORT restart was found that failed to transfer control dynamically."))
1255 (defun abort (&optional condition)
1257 "Transfer control to a restart named ABORT, signalling a CONTROL-ERROR if
1259 (invoke-restart (find-restart-or-control-error 'abort condition))
1260 ;; ABORT signals an error in case there was a restart named ABORT
1261 ;; that did not transfer control dynamically. This could happen with
1263 (error 'abort-failure))
1265 (defun muffle-warning (&optional condition)
1267 "Transfer control to a restart named MUFFLE-WARNING, signalling a
1268 CONTROL-ERROR if none exists."
1269 (invoke-restart (find-restart-or-control-error 'muffle-warning condition)))
1271 (macrolet ((define-nil-returning-restart (name args doc)
1272 #!-sb-doc (declare (ignore doc))
1273 `(defun ,name (,@args &optional condition)
1275 ;; FIXME: Perhaps this shared logic should be pulled out into
1276 ;; FLET MAYBE-INVOKE-RESTART? See whether it shrinks code..
1277 (let ((restart (find-restart ',name condition)))
1279 (invoke-restart restart ,@args))))))
1280 (define-nil-returning-restart continue ()
1281 "Transfer control to a restart named CONTINUE, or return NIL if none exists.")
1282 (define-nil-returning-restart store-value (value)
1283 "Transfer control and VALUE to a restart named STORE-VALUE, or return NIL if
1285 (define-nil-returning-restart use-value (value)
1286 "Transfer control and VALUE to a restart named USE-VALUE, or return NIL if
1289 ;;; single-stepping restarts
1291 (macrolet ((def (name doc)
1292 #!-sb-doc (declare (ignore doc))
1293 `(defun ,name (condition)
1295 (invoke-restart (find-restart-or-control-error ',name condition)))))
1297 "Transfers control to the STEP-CONTINUE restart associated with
1298 the condition, continuing execution without stepping. Signals a
1299 CONTROL-ERROR if the restart does not exist.")
1301 "Transfers control to the STEP-NEXT restart associated with the
1302 condition, executing the current form without stepping and continuing
1303 stepping with the next form. Signals CONTROL-ERROR is the restart does
1306 "Transfers control to the STEP-INTO restart associated with the
1307 condition, stepping into the current form. Signals a CONTROL-ERROR is
1308 the restart does not exist."))
1310 (/show0 "condition.lisp end of file")