1 ;;;; stuff related to the toplevel read-eval-print loop, plus some
2 ;;;; other miscellaneous functions that we don't have any better place
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!IMPL")
16 ;;;; magic specials initialized by GENESIS
18 ;;; FIXME: The DEFVAR here is redundant with the (DECLAIM (SPECIAL ..))
19 ;;; of all static symbols in early-impl.lisp.
21 (defvar *current-catch-block*)
22 (defvar *current-unwind-protect-block*)
23 (defvar *free-interrupt-context-index*))
25 ;;; specials initialized by !COLD-INIT
27 ;;; FIXME: These could be converted to DEFVARs.
28 (declaim (special *gc-inhibit* *need-to-collect-garbage*
30 *before-gc-hooks* *after-gc-hooks*
31 #!+x86 *pseudo-atomic-atomic*
32 #!+x86 *pseudo-atomic-interrupted*
33 sb!unix::*interrupts-enabled*
34 sb!unix::*interrupt-pending*
35 *type-system-initialized*))
37 (defvar *cold-init-complete-p*)
39 ;;; counts of nested errors (with internal errors double-counted)
40 (defvar *maximum-error-depth*)
41 (defvar *current-error-depth*)
43 ;;;; miscellaneous utilities for working with with TOPLEVEL
45 ;;; Execute BODY in a context where any %END-OF-THE-WORLD (thrown e.g.
46 ;;; by QUIT) is caught and any final processing and return codes are
47 ;;; handled appropriately.
48 (defmacro handling-end-of-the-world (&body body)
49 (with-unique-names (caught)
50 `(let ((,caught (catch '%end-of-the-world
51 (/show0 "inside CATCH '%END-OF-THE-WORLD")
53 (/show0 "back from CATCH '%END-OF-THE-WORLD, flushing output")
54 (flush-standard-output-streams)
55 (/show0 "calling UNIX-EXIT")
56 (sb!unix:unix-exit ,caught))))
58 ;;;; working with *CURRENT-ERROR-DEPTH* and *MAXIMUM-ERROR-DEPTH*
60 ;;; INFINITE-ERROR-PROTECT is used by ERROR and friends to keep us out
62 (defmacro infinite-error-protect (&rest forms)
63 `(unless (infinite-error-protector)
64 (/show0 "back from INFINITE-ERROR-PROTECTOR")
65 (let ((*current-error-depth* (1+ *current-error-depth*)))
66 (/show0 "in INFINITE-ERROR-PROTECT, incremented error depth")
67 ;; arbitrary truncation
68 #!+sb-show (sb!debug:backtrace 8)
71 ;;; a helper function for INFINITE-ERROR-PROTECT
72 (defun infinite-error-protector ()
73 (/show0 "entering INFINITE-ERROR-PROTECTOR, *CURRENT-ERROR-DEPTH*=..")
74 (/hexstr *current-error-depth*)
75 (cond ((not *cold-init-complete-p*)
76 (%primitive print "Argh! error in cold init, halting")
77 (%primitive sb!c:halt))
78 ((or (not (boundp '*current-error-depth*))
79 (not (realp *current-error-depth*))
80 (not (boundp '*maximum-error-depth*))
81 (not (realp *maximum-error-depth*)))
82 (%primitive print "Argh! corrupted error depth, halting")
83 (%primitive sb!c:halt))
84 ((> *current-error-depth* *maximum-error-depth*)
85 (/show0 "*MAXIMUM-ERROR-DEPTH*=..")
86 (/hexstr *maximum-error-depth*)
87 (/show0 "in INFINITE-ERROR-PROTECTOR, calling ERROR-ERROR")
91 "KERNEL:*MAXIMUM-ERROR-DEPTH* exceeded.")
94 (/show0 "returning normally from INFINITE-ERROR-PROTECTOR")
97 ;;; FIXME: I had a badly broken version of INFINITE-ERROR-PROTECTOR at
98 ;;; one point (shown below), and SBCL cross-compiled it without
99 ;;; warning about FORMS being undefined. Check whether that problem
100 ;;; (missing warning) is repeatable in the final system and if so, fix
103 (defun infinite-error-protector ()
104 `(cond ((not *cold-init-complete-p*)
105 (%primitive print "Argh! error in cold init, halting")
106 (%primitive sb!c:halt))
107 ((or (not (boundp '*current-error-depth*))
108 (not (realp *current-error-depth*))
109 (not (boundp '*maximum-error-depth*))
110 (not (realp *maximum-error-depth*)))
111 (%primitive print "Argh! corrupted error depth, halting")
112 (%primitive sb!c:halt))
113 ((> *current-error-depth* *maximum-error-depth*)
114 (/show0 "in INFINITE-ERROR-PROTECTOR, calling ERROR-ERROR")
115 (error-error "Help! "
116 *current-error-depth*
118 "KERNEL:*MAXIMUM-ERROR-DEPTH* exceeded.")
122 (/show0 "in INFINITE-ERROR-PROTECTOR, returning normally")
126 ;;;; miscellaneous external functions
130 "This function causes execution to be suspended for N seconds. N may
131 be any non-negative, non-complex number."
132 (when (or (not (realp n))
134 (error 'simple-type-error
135 :format-control "invalid argument to SLEEP: ~S"
136 :format-arguments (list n)
138 :expected-type '(real 0)))
139 (multiple-value-bind (sec usec)
142 (multiple-value-bind (sec frac)
144 (values sec (truncate frac 1e-6))))
145 (sb!unix:unix-select 0 0 0 0 sec usec))
148 ;;;; SCRUB-CONTROL-STACK
150 (defconstant bytes-per-scrub-unit 2048)
152 ;;; Zero the unused portion of the control stack so that old objects
153 ;;; are not kept alive because of uninitialized stack variables.
155 ;;; "To summarize the problem, since not all allocated stack frame
156 ;;; slots are guaranteed to be written by the time you call an another
157 ;;; function or GC, there may be garbage pointers retained in your
158 ;;; dead stack locations. The stack scrubbing only affects the part
159 ;;; of the stack from the SP to the end of the allocated stack."
160 ;;; - ram, on cmucl-imp, Tue, 25 Sep 2001
162 ;;; So, as an (admittedly lame) workaround, from time to time we call
163 ;;; scrub-control-stack to zero out all the unused portion. This is
164 ;;; supposed to happen when the stack is mostly empty, so that we have
165 ;;; a chance of clearing more of it: callers are currently (2002.07.18)
168 (defun scrub-control-stack ()
169 (declare (optimize (speed 3) (safety 0))
170 (values (unsigned-byte 20))) ; FIXME: DECLARE VALUES?
172 #!-stack-grows-downward-not-upward
173 (let* ((csp (sap-int (sb!c::control-stack-pointer-sap)))
174 (initial-offset (logand csp (1- bytes-per-scrub-unit)))
176 (- sb!vm:*control-stack-end* sb!c:*backend-page-size*)))
178 ((scrub (ptr offset count)
179 (declare (type system-area-pointer ptr)
180 (type (unsigned-byte 16) offset)
181 (type (unsigned-byte 20) count)
182 (values (unsigned-byte 20)))
183 (cond ((>= (sap-int ptr) end-of-stack) 0)
184 ((= offset bytes-per-scrub-unit)
185 (look (sap+ ptr bytes-per-scrub-unit) 0 count))
187 (setf (sap-ref-32 ptr offset) 0)
188 (scrub ptr (+ offset sb!vm:n-word-bytes) count))))
189 (look (ptr offset count)
190 (declare (type system-area-pointer ptr)
191 (type (unsigned-byte 16) offset)
192 (type (unsigned-byte 20) count)
193 (values (unsigned-byte 20)))
194 (cond ((>= (sap-int ptr) end-of-stack) 0)
195 ((= offset bytes-per-scrub-unit)
197 ((zerop (sap-ref-32 ptr offset))
198 (look ptr (+ offset sb!vm:n-word-bytes) count))
200 (scrub ptr offset (+ count sb!vm:n-word-bytes))))))
201 (declare (type (unsigned-byte 32) csp))
202 (scrub (int-sap (- csp initial-offset))
203 (* (floor initial-offset sb!vm:n-word-bytes) sb!vm:n-word-bytes)
206 #!+stack-grows-downward-not-upward
207 (let* ((csp (sap-int (sb!c::control-stack-pointer-sap)))
208 (end-of-stack (+ sb!vm:*control-stack-start* sb!c:*backend-page-size*))
209 (initial-offset (logand csp (1- bytes-per-scrub-unit))))
211 ((scrub (ptr offset count)
212 (declare (type system-area-pointer ptr)
213 (type (unsigned-byte 16) offset)
214 (type (unsigned-byte 20) count)
215 (values (unsigned-byte 20)))
216 (let ((loc (int-sap (- (sap-int ptr) (+ offset sb!vm:n-word-bytes)))))
217 (cond ((< (sap-int loc) end-of-stack) 0)
218 ((= offset bytes-per-scrub-unit)
219 (look (int-sap (- (sap-int ptr) bytes-per-scrub-unit))
221 (t ;; need to fix bug in %SET-STACK-REF
222 (setf (sap-ref-32 loc 0) 0)
223 (scrub ptr (+ offset sb!vm:n-word-bytes) count)))))
224 (look (ptr offset count)
225 (declare (type system-area-pointer ptr)
226 (type (unsigned-byte 16) offset)
227 (type (unsigned-byte 20) count)
228 (values (unsigned-byte 20)))
229 (let ((loc (int-sap (- (sap-int ptr) offset))))
230 (cond ((< (sap-int loc) end-of-stack) 0)
231 ((= offset bytes-per-scrub-unit)
233 ((zerop (sb!kernel::get-lisp-obj-address (stack-ref loc 0)))
234 (look ptr (+ offset sb!vm:n-word-bytes) count))
236 (scrub ptr offset (+ count sb!vm:n-word-bytes)))))))
237 (declare (type (unsigned-byte 32) csp))
238 (scrub (int-sap (+ csp initial-offset))
239 (* (floor initial-offset sb!vm:n-word-bytes) sb!vm:n-word-bytes)
242 ;;;; the default toplevel function
246 "a list of all the values returned by the most recent top level EVAL")
247 (defvar // nil #!+sb-doc "the previous value of /")
248 (defvar /// nil #!+sb-doc "the previous value of //")
249 (defvar * nil #!+sb-doc "the value of the most recent top level EVAL")
250 (defvar ** nil #!+sb-doc "the previous value of *")
251 (defvar *** nil #!+sb-doc "the previous value of **")
252 (defvar + nil #!+sb-doc "the value of the most recent top level READ")
253 (defvar ++ nil #!+sb-doc "the previous value of +")
254 (defvar +++ nil #!+sb-doc "the previous value of ++")
255 (defvar - nil #!+sb-doc "the form currently being evaluated")
257 (defun interactive-eval (form)
258 "Evaluate FORM, returning whatever it returns and adjusting ***, **, *,
259 +++, ++, +, ///, //, /, and -."
264 (make-null-interactive-lexenv)))))
275 ;; The bogon returned an unbound marker.
276 ;; FIXME: It would be safer to check every one of the values in RESULTS,
277 ;; instead of just the first one.
279 (cerror "Go on with * set to NIL."
280 "EVAL returned an unbound marker."))
283 ;;; Flush anything waiting on one of the ANSI Common Lisp standard
284 ;;; output streams before proceeding.
285 (defun flush-standard-output-streams ()
286 (dolist (name '(*debug-io*
291 (finish-output (symbol-value name)))
294 ;;; the default system top level function
295 (defun toplevel-init ()
297 (/show0 "entering TOPLEVEL-INIT")
298 (setf sb!thread::*session-lock* (sb!thread:make-mutex :name "the terminal"))
299 (sb!thread::get-foreground)
300 (let (;; value of --sysinit option
302 ;; value of --userinit option
304 ;; values of --eval options, in reverse order; and also any
305 ;; other options (like --load) which're translated into --eval
307 ;; The values are stored as strings, so that they can be
308 ;; passed to READ only after their predecessors have been
309 ;; EVALed, so that things work when e.g. REQUIRE in one EVAL
310 ;; form creates a package referred to in the next EVAL form.
312 ;; Has a --noprint option been seen?
314 ;; everything in *POSIX-ARGV* except for argv[0]=programname
315 (options (rest *posix-argv*)))
317 (declare (type list options))
319 (/show0 "done with outer LET in TOPLEVEL-INIT")
321 ;; FIXME: There are lots of ways for errors to happen around here
322 ;; (e.g. bad command line syntax, or READ-ERROR while trying to
323 ;; READ an --eval string). Make sure that they're handled
324 ;; reasonably. Also, perhaps all errors while parsing the command
325 ;; line should cause the system to QUIT, instead of trying to go
326 ;; into the Lisp debugger, since trying to go into the debugger
327 ;; gets into various annoying issues of where we should go after
328 ;; the user tries to return from the debugger.
330 ;; Parse command line options.
331 (loop while options do
332 (/show0 "at head of LOOP WHILE OPTIONS DO in TOPLEVEL-INIT")
333 (let ((option (first options)))
334 (flet ((pop-option ()
337 (error "unexpected end of command line options"))))
338 (cond ((string= option "--sysinit")
341 (error "multiple --sysinit options")
342 (setf sysinit (pop-option))))
343 ((string= option "--userinit")
346 (error "multiple --userinit options")
347 (setf userinit (pop-option))))
348 ((string= option "--eval")
350 (push (pop-option) reversed-evals))
351 ((string= option "--load")
353 (push (concatenate 'string "(LOAD \"" (pop-option) "\")")
355 ((string= option "--noprint")
358 ;; FIXME: --noprogrammer was deprecated in 0.7.5, and
359 ;; in a year or so this backwards compatibility can
361 ((string= option "--noprogrammer")
362 (warn "treating deprecated --noprogrammer as --disable-debugger")
364 (push "(DISABLE-DEBUGGER)" reversed-evals))
365 ((string= option "--disable-debugger")
367 (push "(DISABLE-DEBUGGER)" reversed-evals))
368 ((string= option "--end-toplevel-options")
372 ;; Anything we don't recognize as a toplevel
373 ;; option must be the start of user-level
374 ;; options.. except that if we encounter
375 ;; "--end-toplevel-options" after we gave up
376 ;; because we didn't recognize an option as a
377 ;; toplevel option, then the option we gave up on
378 ;; must have been an error. (E.g. in
379 ;; "sbcl --eval '(a)' --eval'(b)' --end-toplevel-options"
380 ;; this test will let us detect that the string
381 ;; "--eval(b)" is an error.)
382 (if (find "--end-toplevel-options" options
384 (error "bad toplevel option: ~S" (first options))
386 (/show0 "done with LOOP WHILE OPTIONS DO in TOPLEVEL-INIT")
388 ;; Delete all the options that we processed, so that only
389 ;; user-level options are left visible to user code.
390 (setf (rest *posix-argv*) options)
392 ;; Handle initialization files.
393 (/show0 "handling initialization files in TOPLEVEL-INIT")
394 (flet (;; If any of POSSIBLE-INIT-FILE-NAMES names a real file,
395 ;; return its truename.
396 (probe-init-files (&rest possible-init-file-names)
397 (declare (type list possible-init-file-names))
398 (/show0 "entering PROBE-INIT-FILES")
401 (and (stringp x) (probe-file x)))
402 possible-init-file-names)
403 (/show0 "leaving PROBE-INIT-FILES"))))
404 (let* ((sbcl-home (posix-getenv "SBCL_HOME"))
405 (sysinit-truename (if sbcl-home
406 (probe-init-files sysinit
410 (probe-init-files sysinit
412 "/usr/local/etc/sbclrc")))
413 (user-home (or (posix-getenv "HOME")
414 (error "The HOME environment variable is unbound, ~
415 so user init file can't be found.")))
416 (userinit-truename (probe-init-files userinit
421 ;; We wrap all the pre-REPL user/system customized startup code
424 ;; (Why not wrap everything, even the stuff above, in this
425 ;; restart? Errors above here are basically command line or
426 ;; Unix environment errors, e.g. a missing file or a typo on
427 ;; the Unix command line, and you don't need to get into Lisp
428 ;; to debug them, you should just start over and do it right
429 ;; at the Unix level. Errors below here are generally errors
430 ;; in user Lisp code, and it might be helpful to let the user
431 ;; reach the REPL in order to help figure out what's going
435 (flet ((process-init-file (truename)
437 (unless (load truename)
438 (error "~S was not successfully loaded." truename))
439 (flush-standard-output-streams))))
440 (process-init-file sysinit-truename)
441 (process-init-file userinit-truename))
443 ;; Process --eval options.
444 (/show0 "handling --eval options in TOPLEVEL-INIT")
445 (dolist (expr-as-string (reverse reversed-evals))
446 (/show0 "handling one --eval option in TOPLEVEL-INIT")
447 (let ((expr (with-input-from-string (eval-stream
449 (let* ((eof-marker (cons :eof :eof))
450 (result (read eval-stream nil eof-marker))
451 (eof (read eval-stream nil eof-marker)))
452 (cond ((eq result eof-marker)
453 (error "unable to parse ~S"
455 ((not (eq eof eof-marker))
456 (error "more than one expression in ~S"
461 (flush-standard-output-streams))))
464 "Continue anyway (skipping to toplevel read/eval/print loop)."
465 (/show0 "CONTINUEing from pre-REPL RESTART-CASE")
466 (values)) ; (no-op, just fall through)
468 :report "Quit SBCL (calling #'QUIT, killing the process)."
469 (/show0 "falling through to QUIT from pre-REPL RESTART-CASE")
472 ;; one more time for good measure, in case we fell out of the
473 ;; RESTART-CASE above before one of the flushes in the ordinary
474 ;; flow of control had a chance to operate
475 (flush-standard-output-streams)
477 (/show0 "falling into TOPLEVEL-REPL from TOPLEVEL-INIT")
478 (toplevel-repl noprint)
479 ;; (classic CMU CL error message: "You're certainly a clever child.":-)
480 (critically-unreachable "after TOPLEVEL-REPL"))))
482 ;;; halt-on-failures and prompt-on-failures modes, suitable for
483 ;;; noninteractive and interactive use respectively
484 (defun disable-debugger ()
485 (setf *debugger-hook* 'noprogrammer-debugger-hook-fun
486 *debug-io* *error-output*))
487 (defun enable-debugger ()
488 (setf *debugger-hook* nil
489 *debug-io* *query-io*))
491 ;;; read-eval-print loop for the default system toplevel
492 (defun toplevel-repl (noprint)
493 (/show0 "entering TOPLEVEL-REPL")
494 (let ((* nil) (** nil) (*** nil)
496 (+ nil) (++ nil) (+++ nil)
497 (/// nil) (// nil) (/ nil))
498 ;; WITH-SIMPLE-RESTART doesn't actually restart its body as some
499 ;; (like WHN for an embarrassingly long time ca. 2001-12-07) might
500 ;; think, but instead drops control back out at the end. So when a
501 ;; TOPLEVEL or outermost-ABORT restart happens, we need this outer
502 ;; LOOP wrapper to grab control and start over again. (And it also
503 ;; wraps CATCH 'TOPLEVEL-CATCHER for similar reasons.)
505 (/show0 "about to set up restarts in TOPLEVEL-REPL")
506 ;; There should only be one TOPLEVEL restart, and it's here, so
507 ;; restarting at TOPLEVEL always bounces you all the way out here.
508 (with-simple-restart (toplevel
509 "Restart at toplevel READ/EVAL/PRINT loop.")
510 ;; We add a new ABORT restart for every debugger level, so
511 ;; restarting at ABORT in a nested debugger gets you out to the
512 ;; innermost enclosing debugger, and only when you're in the
513 ;; outermost, unnested debugger level does restarting at ABORT
514 ;; get you out to here.
517 "~@<Reduce debugger level (leaving debugger, returning to toplevel).~@:>")
518 (catch 'toplevel-catcher
519 #!-sunos (sb!unix:unix-sigsetmask 0) ; FIXME: What is this for?
520 ;; in the event of a control-stack-exhausted-error, we should
521 ;; have unwound enough stack by the time we get here that this
523 (sb!kernel::protect-control-stack-guard-page 1)
524 (funcall *repl-fun* noprint)
525 (critically-unreachable "after REPL")))))))
527 ;;; Our default REPL prompt is the minimal traditional one.
528 (defun repl-prompt-fun (stream)
530 (write-string "* " stream)) ; arbitrary but customary REPL prompt
532 ;;; Our default form reader does relatively little magic, but does
533 ;;; handle the Unix-style EOF-is-end-of-process convention.
534 (defun repl-read-form-fun (in out)
535 (declare (type stream in out) (ignore out))
536 (let* ((eof-marker (cons nil nil))
537 (form (read in nil eof-marker)))
538 (if (eq form eof-marker)
542 ;;; hooks to support customized toplevels like ACL-style toplevel
543 ;;; from KMR on sbcl-devel 2002-12-21
544 (defvar *repl-read-form-fun* #'repl-read-form-fun
545 "a function of two stream arguments IN and OUT for the toplevel REPL to
546 call: Return the next Lisp form to evaluate (possibly handling other
547 magic -- like ACL-style keyword commands -- which precede the next
548 Lisp form). The OUT stream is there to support magic which requires
549 issuing new prompts.")
550 (defvar *repl-prompt-fun* #'repl-prompt-fun
551 "a function of one argument STREAM for the toplevel REPL to call: Prompt
552 the user for input.")
553 (defvar *repl-fun* #'repl-fun
554 "a function of one argument NOPRINT that provides the REPL for the system.
555 Assumes that *standard-input* and *standard-output* are setup.")
557 (defun repl-fun (noprint)
558 (/show0 "entering REPL")
560 ;; (See comment preceding the definition of SCRUB-CONTROL-STACK.)
561 (scrub-control-stack)
563 (funcall *repl-prompt-fun* *standard-output*)
564 ;; (Should *REPL-PROMPT-FUN* be responsible for doing its own
565 ;; FORCE-OUTPUT? I can't imagine a valid reason for it not to
566 ;; be done here, so leaving it up to *REPL-PROMPT-FUN* seems
567 ;; odd. But maybe there *is* a valid reason in some
568 ;; circumstances? perhaps some deadlock issue when being driven
569 ;; by another process or something...)
570 (force-output *standard-output*))
571 (let* ((form (funcall *repl-read-form-fun*
574 (results (multiple-value-list (interactive-eval form))))
576 (dolist (result results)
580 ;;; suitable value for *DEBUGGER-HOOK* for a noninteractive Unix-y program
581 (defun noprogrammer-debugger-hook-fun (condition old-debugger-hook)
582 (declare (ignore old-debugger-hook))
583 (flet ((failure-quit (&key recklessly-p)
584 (/show0 "in FAILURE-QUIT (in --disable-debugger debugger hook)")
585 (quit :unix-status 1 :recklessly-p recklessly-p)))
586 ;; This HANDLER-CASE is here mostly to stop output immediately
587 ;; (and fall through to QUIT) when there's an I/O error. Thus,
588 ;; when we're run under a shell script or something, we can die
589 ;; cleanly when the script dies (and our pipes are cut), instead
590 ;; of falling into ldb or something messy like that.
593 (format *error-output*
594 "~&~@<unhandled condition (of type ~S): ~2I~_~A~:>~2%"
597 ;; Flush *ERROR-OUTPUT* even before the BACKTRACE, so that
598 ;; even if we hit an error within BACKTRACE (e.g. a bug in
599 ;; the debugger's own frame-walking code, or a bug in a user
600 ;; PRINT-OBJECT method) we'll at least have the CONDITION
601 ;; printed out before we die.
602 (finish-output *error-output*)
603 ;; (Where to truncate the BACKTRACE is of course arbitrary, but
604 ;; it seems as though we should at least truncate it somewhere.)
605 (sb!debug:backtrace 128 *error-output*)
608 "~%unhandled condition in --disable-debugger mode, quitting~%")
609 (finish-output *error-output*)
612 ;; We IGNORE-ERRORS here because even %PRIMITIVE PRINT can
613 ;; fail when our output streams are blown away, as e.g. when
614 ;; we're running under a Unix shell script and it dies somehow
615 ;; (e.g. because of a SIGINT). In that case, we might as well
616 ;; just give it up for a bad job, and stop trying to notify
617 ;; the user of anything.
619 ;; Actually, the only way I've run across to exercise the
620 ;; problem is to have more than one layer of shell script.
621 ;; I have a shell script which does
622 ;; time nice -10 sh make.sh "$1" 2>&1 | tee make.tmp
623 ;; and the problem occurs when I interrupt this with Ctrl-C
624 ;; under Linux 2.2.14-5.0 and GNU bash, version 1.14.7(1).
625 ;; I haven't figured out whether it's bash, time, tee, Linux, or
626 ;; what that is responsible, but that it's possible at all
627 ;; means that we should IGNORE-ERRORS here. -- WHN 2001-04-24
630 "Argh! error within --disable-debugger error handling"))
631 (failure-quit :recklessly-p t)))))
633 ;;; a convenient way to get into the assembly-level debugger
635 (%primitive sb!c:halt))