1 ;;;; stuff that creates debugger information from the compiler's
2 ;;;; internal data structures
4 ;;;; This software is part of the SBCL system. See the README file for
7 ;;;; This software is derived from the CMU CL system, which was
8 ;;;; written at Carnegie Mellon University and released into the
9 ;;;; public domain. The software is in the public domain and is
10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
11 ;;;; files for more information.
15 (deftype byte-buffer () '(vector (unsigned-byte 8)))
16 (defvar *byte-buffer*)
17 (declaim (type byte-buffer *byte-buffer*))
21 (deftype location-kind ()
22 '(member :unknown-return :known-return :internal-error :non-local-exit
23 :block-start :call-site :single-value-return :non-local-entry))
25 ;;; The LOCATION-INFO structure holds the information what we need
26 ;;; about locations which code generation decided were "interesting".
27 (defstruct (location-info
28 (:constructor make-location-info (kind label vop))
30 ;; The kind of location noted.
31 (kind nil :type location-kind)
32 ;; The label pointing to the interesting code location.
33 (label nil :type (or label index null))
34 ;; The VOP that emitted this location (for node, save-set, ir2-block, etc.)
37 ;;; This is called during code generation in places where there is an
38 ;;; "interesting" location: someplace where we are likely to end up
39 ;;; in the debugger, and thus want debug info.
40 (defun note-debug-location (vop label kind)
41 (declare (type vop vop) (type (or label null) label)
42 (type location-kind kind))
43 (let ((location (make-location-info kind label vop)))
44 (setf (ir2-block-locations (vop-block vop))
45 (nconc (ir2-block-locations (vop-block vop))
49 #!-sb-fluid (declaim (inline ir2-block-environment))
50 (defun ir2-block-environment (2block)
51 (declare (type ir2-block 2block))
52 (block-environment (ir2-block-block 2block)))
54 ;;; Given a local conflicts vector and an IR2 block to represent the
55 ;;; set of live TNs, and the VAR-LOCS hash-table representing the
56 ;;; variables dumped, compute a bit-vector representing the set of
57 ;;; live variables. If the TN is environment-live, we only mark it as
58 ;;; live when it is in scope at NODE.
59 (defun compute-live-vars (live node block var-locs vop)
60 (declare (type ir2-block block) (type local-tn-bit-vector live)
61 (type hash-table var-locs) (type node node)
62 (type (or vop null) vop))
63 (let ((res (make-array (logandc2 (+ (hash-table-count var-locs) 7) 7)
67 (ir2-component-spilled-vops
68 (component-info *component-being-compiled*)))))
69 (do-live-tns (tn live block)
70 (let ((leaf (tn-leaf tn)))
71 (when (and (lambda-var-p leaf)
72 (or (not (member (tn-kind tn)
73 '(:environment :debug-environment)))
74 (rassoc leaf (lexenv-variables (node-lexenv node))))
76 (not (member tn spilled))))
77 (let ((num (gethash leaf var-locs)))
79 (setf (sbit res num) 1))))))
82 ;;; The PC for the location most recently dumped.
83 (defvar *previous-location*)
84 (declaim (type index *previous-location*))
86 ;;; Dump a compiled debug-location into *BYTE-BUFFER* that describes
87 ;;; the code/source map and live info. If true, VOP is the VOP
88 ;;; associated with this location, for use in determining whether TNs
90 (defun dump-1-location (node block kind tlf-num label live var-locs vop)
91 (declare (type node node) (type ir2-block block)
92 (type local-tn-bit-vector live)
93 (type (or label index) label)
94 (type location-kind kind) (type (or index null) tlf-num)
95 (type hash-table var-locs) (type (or vop null) vop))
98 (dpb (position-or-lose kind *compiled-code-location-kinds*)
99 compiled-code-location-kind-byte
103 (let ((loc (if (fixnump label) label (label-position label))))
104 (write-var-integer (- loc *previous-location*) *byte-buffer*)
105 (setq *previous-location* loc))
107 (let ((path (node-source-path node)))
109 (write-var-integer (source-path-tlf-number path) *byte-buffer*))
110 (write-var-integer (source-path-form-number path) *byte-buffer*))
112 (write-packed-bit-vector (compute-live-vars live node block var-locs vop)
117 ;;; Extract context info from a Location-Info structure and use it to
118 ;;; dump a compiled code-location.
119 (defun dump-location-from-info (loc tlf-num var-locs)
120 (declare (type location-info loc) (type (or index null) tlf-num)
121 (type hash-table var-locs))
122 (let ((vop (location-info-vop loc)))
123 (dump-1-location (vop-node vop)
125 (location-info-kind loc)
127 (location-info-label loc)
133 ;;; Scan all the blocks, determining if all locations are in the same
134 ;;; TLF, and returning it or NIL.
135 (defun find-tlf-number (fun)
136 (declare (type clambda fun))
137 (let ((res (source-path-tlf-number (node-source-path (lambda-bind fun)))))
138 (declare (type (or index null) res))
139 (do-environment-ir2-blocks (2block (lambda-environment fun))
140 (let ((block (ir2-block-block 2block)))
141 (when (eq (block-info block) 2block)
142 (unless (eql (source-path-tlf-number
145 (block-start block))))
149 (dolist (loc (ir2-block-locations 2block))
150 (unless (eql (source-path-tlf-number
152 (vop-node (location-info-vop loc))))
157 ;;; Dump out the number of locations and the locations for Block.
158 (defun dump-block-locations (block locations tlf-num var-locs)
159 (declare (type cblock block) (list locations))
161 (eq (location-info-kind (first locations))
163 (write-var-integer (length locations) *byte-buffer*)
164 (let ((2block (block-info block)))
165 (write-var-integer (+ (length locations) 1) *byte-buffer*)
166 (dump-1-location (continuation-next (block-start block))
167 2block :block-start tlf-num
168 (ir2-block-%label 2block)
169 (ir2-block-live-out 2block)
172 (dolist (loc locations)
173 (dump-location-from-info loc tlf-num var-locs))
176 ;;; Dump the successors of Block, being careful not to fly into space on
177 ;;; weird successors.
178 (defun dump-block-successors (block env)
179 (declare (type cblock block) (type environment env))
180 (let* ((tail (component-tail (block-component block)))
181 (succ (block-succ block))
184 (or (eq (car succ) tail)
185 (not (eq (block-environment (car succ)) env))))
189 (dpb (length valid-succ) compiled-debug-block-nsucc-byte 0)
191 (let ((base (block-number
193 (lambda-bind (environment-function env))))))
194 (dolist (b valid-succ)
196 (the index (- (block-number b) base))
200 ;;; Return a vector and an integer (or null) suitable for use as the
201 ;;; BLOCKS and TLF-NUMBER in FUN's debug-function. This requires two
202 ;;; passes to compute:
203 ;;; -- Scan all blocks, dumping the header and successors followed
204 ;;; by all the non-elsewhere locations.
205 ;;; -- Dump the elsewhere block header and all the elsewhere
206 ;;; locations (if any.)
207 (defun compute-debug-blocks (fun var-locs)
208 (declare (type clambda fun) (type hash-table var-locs))
209 (setf (fill-pointer *byte-buffer*) 0)
210 (let ((*previous-location* 0)
211 (tlf-num (find-tlf-number fun))
212 (env (lambda-environment fun))
215 (collect ((elsewhere))
216 (do-environment-ir2-blocks (2block env)
217 (let ((block (ir2-block-block 2block)))
218 (when (eq (block-info block) 2block)
220 (dump-block-locations prev-block prev-locs tlf-num var-locs))
221 (setq prev-block block prev-locs ())
222 (dump-block-successors block env)))
224 (collect ((here prev-locs))
225 (dolist (loc (ir2-block-locations 2block))
226 (if (label-elsewhere-p (location-info-label loc))
229 (setq prev-locs (here))))
231 (dump-block-locations prev-block prev-locs tlf-num var-locs)
234 (vector-push-extend compiled-debug-block-elsewhere-p *byte-buffer*)
235 (write-var-integer (length (elsewhere)) *byte-buffer*)
236 (dolist (loc (elsewhere))
237 (dump-location-from-info loc tlf-num var-locs))))
239 (values (copy-seq *byte-buffer*) tlf-num)))
241 ;;; Return a list of DEBUG-SOURCE structures containing information
242 ;;; derived from INFO. Unless :BYTE-COMPILE T was specified, we always
243 ;;; dump the Start-Positions, since it is too hard figure out whether
244 ;;; we need them or not.
245 (defun debug-source-for-info (info)
246 (declare (type source-info info))
247 (let* ((file-info (source-info-file-info info))
248 (res (make-debug-source
250 :created (file-info-write-date file-info)
251 :compiled (source-info-start-time info)
252 :source-root (file-info-source-root file-info)
254 (unless (eq *byte-compile* t)
255 (coerce-to-smallest-eltype
256 (file-info-positions file-info)))))
257 (name (file-info-name file-info)))
260 (setf (debug-source-from res) name)
261 (setf (debug-source-name res)
262 (coerce (file-info-forms file-info) 'simple-vector)))
264 (let* ((untruename (file-info-untruename file-info))
265 (dir (pathname-directory untruename)))
266 (setf (debug-source-name res)
268 (if (and dir (eq (first dir) :absolute))
274 ;;; Given an arbitrary sequence, coerce it to an unsigned vector if
275 ;;; possible. Ordinarily we coerce it to the smallest specialized
276 ;;; vector we can. However, we also have a special hack for
277 ;;; cross-compiling at bootstrap time, when arbitrarily-specialized
278 ;;; vectors aren't fully supported: in that case, we coerce it only to
279 ;;; a vector whose element size is an integer multiple of output byte
281 (defun coerce-to-smallest-eltype (seq)
282 (let ((maxoid #-sb-xc-host 0
283 ;; An initial value of 255 prevents us from
284 ;; specializing the array to anything smaller than
285 ;; (UNSIGNED-BYTE 8), which keeps the cross-compiler's
286 ;; portable specialized array output functions happy.
289 (if (typep x 'unsigned-byte)
292 (return-from coerce-to-smallest-eltype
293 (coerce seq 'simple-vector)))))
299 (coerce seq `(simple-array (integer 0 ,maxoid) (*))))))
303 ;;; Return a SC-OFFSET describing TN's location.
304 (defun tn-sc-offset (tn)
305 (declare (type tn tn))
306 (make-sc-offset (sc-number (tn-sc tn))
309 ;;; Dump info to represent Var's location being TN. ID is an integer
310 ;;; that makes Var's name unique in the function. Buffer is the vector
311 ;;; we stick the result in. If Minimal is true, we suppress name
312 ;;; dumping, and set the minimal flag.
314 ;;; The debug-var is only marked as always-live if the TN is
315 ;;; environment live and is an argument. If a :debug-environment TN,
316 ;;; then we also exclude set variables, since the variable is not
317 ;;; guaranteed to be live everywhere in that case.
318 (defun dump-1-variable (fun var tn id minimal buffer)
319 (declare (type lambda-var var) (type (or tn null) tn) (type index id)
321 (let* ((name (leaf-name var))
322 (save-tn (and tn (tn-save-tn tn)))
323 (kind (and tn (tn-kind tn)))
325 (declare (type index flags))
327 (setq flags (logior flags compiled-debug-var-minimal-p))
329 (setq flags (logior flags compiled-debug-var-deleted-p))))
330 (when (and (or (eq kind :environment)
331 (and (eq kind :debug-environment)
332 (null (basic-var-sets var))))
333 (not (gethash tn (ir2-component-spilled-tns
334 (component-info *component-being-compiled*))))
335 (eq (lambda-var-home var) fun))
336 (setq flags (logior flags compiled-debug-var-environment-live)))
338 (setq flags (logior flags compiled-debug-var-save-loc-p)))
339 (unless (or (zerop id) minimal)
340 (setq flags (logior flags compiled-debug-var-id-p)))
341 (vector-push-extend flags buffer)
343 (vector-push-extend name buffer)
345 (vector-push-extend id buffer)))
347 (vector-push-extend (tn-sc-offset tn) buffer)
350 (vector-push-extend (tn-sc-offset save-tn) buffer)))
353 ;;; Return a vector suitable for use as the DEBUG-FUNCTION-VARIABLES
354 ;;; of FUN. LEVEL is the current DEBUG-INFO quality. VAR-LOCS is a
355 ;;; hashtable in which we enter the translation from LAMBDA-VARS to
356 ;;; the relative position of that variable's location in the resulting
358 (defun compute-variables (fun level var-locs)
359 (declare (type clambda fun) (type hash-table var-locs))
361 (labels ((frob-leaf (leaf tn gensym-p)
362 (let ((name (leaf-name leaf)))
363 (when (and name (leaf-refs leaf) (tn-offset tn)
364 (or gensym-p (symbol-package name)))
365 (vars (cons leaf tn)))))
366 (frob-lambda (x gensym-p)
367 (dolist (leaf (lambda-vars x))
368 (frob-leaf leaf (leaf-info leaf) gensym-p))))
371 (dolist (x (ir2-environment-environment
372 (environment-info (lambda-environment fun))))
373 (let ((thing (car x)))
374 (when (lambda-var-p thing)
375 (frob-leaf thing (cdr x) (= level 3)))))
377 (dolist (let (lambda-lets fun))
378 (frob-lambda let (= level 3)))))
380 (let ((sorted (sort (vars) #'string<
382 (symbol-name (leaf-name (car x))))))
386 (buffer (make-array 0 :fill-pointer 0 :adjustable t)))
387 (declare (type (or simple-string null) prev-name)
391 (name (symbol-name (leaf-name var))))
392 (cond ((and prev-name (string= prev-name name))
395 (setq id 0 prev-name name)))
396 (dump-1-variable fun var (cdr x) id nil buffer)
397 (setf (gethash var var-locs) i))
399 (coerce buffer 'simple-vector))))
401 ;;; Return a vector suitable for use as the DEBUG-FUNCTION-VARIABLES of
402 ;;; FUN, representing the arguments to FUN in minimal variable format.
403 (defun compute-minimal-variables (fun)
404 (declare (type clambda fun))
405 (let ((buffer (make-array 0 :fill-pointer 0 :adjustable t)))
406 (dolist (var (lambda-vars fun))
407 (dump-1-variable fun var (leaf-info var) 0 t buffer))
408 (coerce buffer 'simple-vector)))
410 ;;; Return Var's relative position in the function's variables (determined
411 ;;; from the Var-Locs hashtable.) If Var is deleted, then return DELETED.
412 (defun debug-location-for (var var-locs)
413 (declare (type lambda-var var) (type hash-table var-locs))
414 (let ((res (gethash var var-locs)))
417 (aver (or (null (leaf-refs var))
418 (not (tn-offset (leaf-info var)))))
421 ;;;; arguments/returns
423 ;;; Return a vector to be used as the
424 ;;; COMPILED-DEBUG-FUNCTION-ARGUMENTS for Fun. If fun is the
425 ;;; MAIN-ENTRY for an optional dispatch, then look at the ARGLIST to
426 ;;; determine the syntax, otherwise pretend all arguments are fixed.
428 ;;; ### This assumption breaks down in EPs other than the main-entry,
429 ;;; since they may or may not have supplied-p vars, etc.
430 (defun compute-arguments (fun var-locs)
431 (declare (type clambda fun) (type hash-table var-locs))
433 (let ((od (lambda-optional-dispatch fun)))
434 (if (and od (eq (optional-dispatch-main-entry od) fun))
435 (let ((actual-vars (lambda-vars fun))
437 (dolist (arg (optional-dispatch-arglist od))
438 (let ((info (lambda-var-arg-info arg))
439 (actual (pop actual-vars)))
441 (case (arg-info-kind info)
443 (res (arg-info-key info)))
451 (setq saw-optional t))))
452 (res (debug-location-for actual var-locs))
453 (when (arg-info-supplied-p info)
455 (res (debug-location-for (pop actual-vars) var-locs))))
457 (res (debug-location-for actual var-locs)))))))
458 (dolist (var (lambda-vars fun))
459 (res (debug-location-for var var-locs)))))
461 (coerce-to-smallest-eltype (res))))
463 ;;; Return a vector of SC offsets describing Fun's return locations.
464 ;;; (Must be known values return...)
465 (defun compute-debug-returns (fun)
466 (coerce-to-smallest-eltype
467 (mapcar #'(lambda (loc)
469 (return-info-locations (tail-set-info (lambda-tail-set fun))))))
473 ;;; Return a C-D-F structure with all the mandatory slots filled in.
474 (defun dfun-from-fun (fun)
475 (declare (type clambda fun))
476 (let* ((2env (environment-info (lambda-environment fun)))
477 (dispatch (lambda-optional-dispatch fun))
478 (main-p (and dispatch
479 (eq fun (optional-dispatch-main-entry dispatch)))))
480 (make-compiled-debug-function
481 :name (cond ((leaf-name fun))
482 ((let ((ef (functional-entry-function
484 (and ef (leaf-name ef))))
485 ((and main-p (leaf-name dispatch)))
488 (block-component (node-block (lambda-bind fun))))))
489 :kind (if main-p nil (functional-kind fun))
490 :return-pc (tn-sc-offset (ir2-environment-return-pc 2env))
491 :old-fp (tn-sc-offset (ir2-environment-old-fp 2env))
492 :start-pc (label-position (ir2-environment-environment-start 2env))
493 :elsewhere-pc (label-position (ir2-environment-elsewhere-start 2env)))))
495 ;;; Return a complete C-D-F structure for Fun. This involves
496 ;;; determining the DEBUG-INFO level and filling in optional slots as
498 (defun compute-1-debug-function (fun var-locs)
499 (declare (type clambda fun) (type hash-table var-locs))
500 (let* ((dfun (dfun-from-fun fun))
501 (actual-level (policy (lambda-bind fun) debug))
502 (level (if #!+sb-dyncount *collect-dynamic-statistics*
506 (cond ((zerop level))
508 (let ((od (lambda-optional-dispatch fun)))
510 (not (eq (optional-dispatch-main-entry od) fun)))))
511 (setf (compiled-debug-function-variables dfun)
512 (compute-minimal-variables fun))
513 (setf (compiled-debug-function-arguments dfun) :minimal))
515 (setf (compiled-debug-function-variables dfun)
516 (compute-variables fun level var-locs))
517 (setf (compiled-debug-function-arguments dfun)
518 (compute-arguments fun var-locs))))
521 (multiple-value-bind (blocks tlf-num) (compute-debug-blocks fun var-locs)
522 (setf (compiled-debug-function-tlf-number dfun) tlf-num)
523 (setf (compiled-debug-function-blocks dfun) blocks)))
525 (if (external-entry-point-p fun)
526 (setf (compiled-debug-function-returns dfun) :standard)
527 (let ((info (tail-set-info (lambda-tail-set fun))))
529 (cond ((eq (return-info-kind info) :unknown)
530 (setf (compiled-debug-function-returns dfun)
533 (setf (compiled-debug-function-returns dfun)
534 (compute-debug-returns fun)))))))
537 ;;;; minimal debug functions
539 ;;; Return true if DFUN can be represented as a minimal debug
540 ;;; function. DFUN is a cons (<start offset> . C-D-F).
541 (defun debug-function-minimal-p (dfun)
542 (declare (type cons dfun))
543 (let ((dfun (cdr dfun)))
544 (and (member (compiled-debug-function-arguments dfun) '(:minimal nil))
545 (null (compiled-debug-function-blocks dfun)))))
547 ;;; Dump a packed binary representation of a DFUN into *BYTE-BUFFER*.
548 ;;; PREV-START and START are the byte offsets in the code where the
549 ;;; previous function started and where this one starts.
550 ;;; PREV-ELSEWHERE is the previous function's elsewhere PC.
551 (defun dump-1-minimal-dfun (dfun prev-start start prev-elsewhere)
552 (declare (type compiled-debug-function dfun)
553 (type index prev-start start prev-elsewhere))
554 (let* ((name (compiled-debug-function-name dfun))
555 (setf-p (and (consp name) (eq (car name) 'setf)
556 (consp (cdr name)) (symbolp (cadr name))))
557 (base-name (if setf-p (cadr name) name))
558 (pkg (when (symbolp base-name)
559 (symbol-package base-name)))
561 (cond ((stringp base-name)
562 minimal-debug-function-name-component)
564 minimal-debug-function-name-uninterned)
565 ((eq pkg (sane-package))
566 minimal-debug-function-name-symbol)
568 minimal-debug-function-name-packaged))))
569 (aver (or (atom name) setf-p))
571 (setf (ldb minimal-debug-function-name-style-byte options) name-rep)
572 (setf (ldb minimal-debug-function-kind-byte options)
573 (position-or-lose (compiled-debug-function-kind dfun)
574 *minimal-debug-function-kinds*))
575 (setf (ldb minimal-debug-function-returns-byte options)
576 (etypecase (compiled-debug-function-returns dfun)
577 ((member :standard) minimal-debug-function-returns-standard)
578 ((member :fixed) minimal-debug-function-returns-fixed)
579 (vector minimal-debug-function-returns-specified)))
580 (vector-push-extend options *byte-buffer*))
584 (setq flags (logior flags minimal-debug-function-setf-bit)))
585 (when (compiled-debug-function-nfp dfun)
586 (setq flags (logior flags minimal-debug-function-nfp-bit)))
587 (when (compiled-debug-function-variables dfun)
588 (setq flags (logior flags minimal-debug-function-variables-bit)))
589 (vector-push-extend flags *byte-buffer*))
591 (when (eql name-rep minimal-debug-function-name-packaged)
592 (write-var-string (package-name pkg) *byte-buffer*))
593 (unless (stringp base-name)
594 (write-var-string (symbol-name base-name) *byte-buffer*))
596 (let ((vars (compiled-debug-function-variables dfun)))
598 (let ((len (length vars)))
599 (write-var-integer len *byte-buffer*)
601 (vector-push-extend (aref vars i) *byte-buffer*)))))
603 (let ((returns (compiled-debug-function-returns dfun)))
604 (when (vectorp returns)
605 (let ((len (length returns)))
606 (write-var-integer len *byte-buffer*)
608 (write-var-integer (aref returns i) *byte-buffer*)))))
610 (write-var-integer (compiled-debug-function-return-pc dfun)
612 (write-var-integer (compiled-debug-function-old-fp dfun)
614 (when (compiled-debug-function-nfp dfun)
615 (write-var-integer (compiled-debug-function-nfp dfun)
617 (write-var-integer (- start prev-start) *byte-buffer*)
618 (write-var-integer (- (compiled-debug-function-start-pc dfun) start)
620 (write-var-integer (- (compiled-debug-function-elsewhere-pc dfun)
624 ;;; Return a byte-vector holding all the debug functions for a
625 ;;; component in the packed binary minimal-debug-function format.
626 (defun compute-minimal-debug-functions (dfuns)
627 (declare (list dfuns))
628 (setf (fill-pointer *byte-buffer*) 0)
632 (let ((start (car dfun))
633 (elsewhere (compiled-debug-function-elsewhere-pc (cdr dfun))))
634 (dump-1-minimal-dfun (cdr dfun) prev-start start prev-elsewhere)
635 (setq prev-start start prev-elsewhere elsewhere))))
636 (copy-seq *byte-buffer*))
638 ;;;; full component dumping
640 ;;; Compute the full form (simple-vector) function map.
641 (defun compute-debug-function-map (sorted)
642 (declare (list sorted))
643 (let* ((len (1- (* (length sorted) 2)))
644 (funs-vec (make-array len)))
646 (sorted sorted (cdr sorted)))
649 (let ((dfun (car sorted)))
651 (setf (svref funs-vec i) (car dfun)))
652 (setf (svref funs-vec (1+ i)) (cdr dfun))))
655 ;;; Return a DEBUG-INFO structure describing COMPONENT. This has to be
656 ;;; called after assembly so that source map information is available.
657 (defun debug-info-for-component (component)
658 (declare (type component component))
660 (let ((var-locs (make-hash-table :test 'eq))
661 ;; FIXME: What is *BYTE-BUFFER* for? Has it become dead code
662 ;; now that we no longer use minimal-debug-function
664 (*byte-buffer* (make-array 10
665 :element-type '(unsigned-byte 8)
668 (dolist (fun (component-lambdas component))
670 (dfuns (cons (label-position
671 (block-label (node-block (lambda-bind fun))))
672 (compute-1-debug-function fun var-locs))))
673 (let* ((sorted (sort (dfuns) #'< :key #'car))
675 ;; (IF (EVERY #'DEBUG-FUNCTION-MINIMAL-P SORTED)
676 ;; (COMPUTE-MINIMAL-DEBUG-FUNCTIONS SORTED)
677 ;; (COMPUTE-DEBUG-FUNCTION-MAP SORTED))
678 ;; here. We've gotten rid of the minimal-debug-function
679 ;; case in SBCL because the minimal representation
680 ;; couldn't be made to transform properly under package
681 ;; renaming. Now that that case is gone, a lot of code is
682 ;; dead, and once everything is known to work, the dead
683 ;; code should be deleted.
684 (function-map (compute-debug-function-map sorted)))
685 (make-compiled-debug-info :name (component-name component)
686 :function-map function-map)))))
688 ;;; Write BITS out to BYTE-BUFFER in backend byte order. The length of
689 ;;; BITS must be evenly divisible by eight.
690 (defun write-packed-bit-vector (bits byte-buffer)
691 (declare (type simple-bit-vector bits) (type byte-buffer byte-buffer))
692 (multiple-value-bind (initial step done)
693 (ecase *backend-byte-order*
694 (:little-endian (values 0 1 8))
695 (:big-endian (values 7 -1 -1)))
696 (let ((shift initial)
698 (dotimes (i (length bits))
699 (let ((int (aref bits i)))
700 (setf byte (logior byte (ash int shift)))
703 (vector-push-extend byte byte-buffer)
706 (unless (= shift initial)
707 (vector-push-extend byte byte-buffer))))