1 ;;;; stuff that knows about dumping FASL files
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; This software is derived from the CMU CL system, which was
7 ;;;; written at Carnegie Mellon University and released into the
8 ;;;; public domain. The software is in the public domain and is
9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
10 ;;;; files for more information.
12 (in-package "SB!FASL")
13 ;;; KLUDGE: Even though we're IN-PACKAGE SB!FASL, some of the code in
14 ;;; here is awfully chummy with the SB!C package. CMU CL didn't have
15 ;;; any separation between the two packages, and a lot of tight
16 ;;; coupling remains. -- WHN 2001-06-04
18 ;;;; fasl dumper state
20 ;;; The FASL-OUTPUT structure represents everything we need to
21 ;;; know about dumping to a fasl file. (We need to objectify the
22 ;;; state because the fasdumper must be reentrant.)
23 (defstruct (fasl-output
24 #-no-ansi-print-object
25 (:print-object (lambda (x s)
26 (print-unreadable-object (x s :type t)
27 (prin1 (namestring (fasl-output-stream x))
30 ;; the stream we dump to
31 (stream (missing-arg) :type stream)
32 ;; hashtables we use to keep track of dumped constants so that we
33 ;; can get them from the table rather than dumping them again. The
34 ;; EQUAL-TABLE is used for lists and strings, and the EQ-TABLE is
35 ;; used for everything else. We use a separate EQ table to avoid
36 ;; performance patholigies with objects for which EQUAL degnerates
37 ;; to EQL. Everything entered in the EQUAL table is also entered in
39 (equal-table (make-hash-table :test 'equal) :type hash-table)
40 (eq-table (make-hash-table :test 'eq) :type hash-table)
41 ;; the table's current free pointer: the next offset to be used
42 (table-free 0 :type index)
43 ;; an alist (PACKAGE . OFFSET) of the table offsets for each package
44 ;; we have currently located.
45 (packages () :type list)
46 ;; a table mapping from the ENTRY-INFO structures for dumped XEPs to
47 ;; the table offsets of the corresponding code pointers
48 (entry-table (make-hash-table :test 'eq) :type hash-table)
49 ;; a table holding back-patching info for forward references to XEPs.
50 ;; The key is the ENTRY-INFO structure for the XEP, and the value is
51 ;; a list of conses (<code-handle> . <offset>), where <code-handle>
52 ;; is the offset in the table of the code object needing to be
53 ;; patched, and <offset> is the offset that must be patched.
54 (patch-table (make-hash-table :test 'eq) :type hash-table)
55 ;; a list of the table handles for all of the DEBUG-INFO structures
56 ;; dumped in this file. These structures must be back-patched with
57 ;; source location information when the compilation is complete.
58 (debug-info () :type list)
59 ;; This is used to keep track of objects that we are in the process
60 ;; of dumping so that circularities can be preserved. The key is the
61 ;; object that we have previously seen, and the value is the object
62 ;; that we reference in the table to find this previously seen
63 ;; object. (The value is never NIL.)
65 ;; Except with list objects, the key and the value are always the
66 ;; same. In a list, the key will be some tail of the value.
67 (circularity-table (make-hash-table :test 'eq) :type hash-table)
68 ;; a hash table of structures that are allowed to be dumped. If we
69 ;; try to dump a structure that isn't in this hash table, we lose.
70 (valid-structures (make-hash-table :test 'eq) :type hash-table))
72 ;;; This structure holds information about a circularity.
73 (defstruct (circularity (:copier nil))
74 ;; the kind of modification to make to create circularity
75 (type (missing-arg) :type (member :rplaca :rplacd :svset :struct-set))
76 ;; the object containing circularity
78 ;; index in object for circularity
79 (index (missing-arg) :type index)
80 ;; the object to be stored at INDEX in OBJECT. This is that the key
81 ;; that we were using when we discovered the circularity.
83 ;; the value that was associated with VALUE in the
84 ;; CIRCULARITY-TABLE. This is the object that we look up in the
85 ;; EQ-TABLE to locate VALUE.
88 ;;; a list of the CIRCULARITY structures for all of the circularities
89 ;;; detected in the current top level call to DUMP-OBJECT. Setting
90 ;;; this lobotomizes circularity detection as well, since circular
91 ;;; dumping uses the table.
92 (defvar *circularities-detected*)
94 ;;; used to inhibit table access when dumping forms to be read by the
96 (defvar *cold-load-dump* nil)
98 ;;; used to turn off the structure validation during dumping of source
100 (defvar *dump-only-valid-structures* t)
103 ;;; Write the byte B to the specified FASL-OUTPUT stream.
104 (defun dump-byte (b fasl-output)
105 (declare (type (unsigned-byte 8) b) (type fasl-output fasl-output))
106 (write-byte b (fasl-output-stream fasl-output)))
108 ;;; Dump a 4 byte unsigned integer.
109 (defun dump-unsigned-32 (num fasl-output)
110 (declare (type (unsigned-byte 32) num))
111 (declare (type fasl-output fasl-output))
112 (let ((stream (fasl-output-stream fasl-output)))
114 (write-byte (ldb (byte 8 (* 8 i)) num) stream))))
116 ;;; Dump NUM to the fasl stream, represented by N bytes. This works
117 ;;; for either signed or unsigned integers. There's no range checking
118 ;;; -- if you don't specify enough bytes for the number to fit, this
119 ;;; function cheerfully outputs the low bytes.
120 (defun dump-integer-as-n-bytes (num bytes fasl-output)
121 (declare (integer num) (type index bytes))
122 (declare (type fasl-output fasl-output))
123 (do ((n num (ash n -8))
126 (declare (type index i))
127 (dump-byte (logand n #xff) fasl-output))
130 ;;; Setting this variable to an (UNSIGNED-BYTE 32) value causes
131 ;;; DUMP-FOP to use it as a counter and emit a FOP-NOP4 with the
132 ;;; counter value before every ordinary fop. This can make it easier
133 ;;; to follow the progress of LOAD-AS-FASL when
134 ;;; debugging/testing/experimenting.
135 #!+sb-show (defvar *fop-nop4-count* nil)
136 #!+sb-show (declaim (type (or (unsigned-byte 32) null) *fop-nop4-count*))
138 ;;; Dump the FOP code for the named FOP to the specified FASL-OUTPUT.
140 ;;; FIXME: This should be a function, with a compiler macro expansion
141 ;;; for the common constant-FS case. (Among other things, that'll stop
142 ;;; it from EVALing ,FILE multiple times.)
144 ;;; FIXME: Compiler macros, frozen classes, inlining, and similar
145 ;;; optimizations should be conditional on #!+SB-FROZEN.
146 (defmacro dump-fop (fs file)
147 (let* ((fs (eval fs))
148 (val (get fs 'fop-code)))
152 (when *fop-nop4-count*
153 (dump-byte ,(get 'fop-nop4 'fop-code) ,file)
154 (dump-unsigned-32 (mod (incf *fop-nop4-count*) (expt 2 32)) ,file))
155 (dump-byte ',val ,file))
156 (error "compiler bug: ~S is not a legal fasload operator." fs))))
158 ;;; Dump a FOP-CODE along with an integer argument, choosing the FOP
159 ;;; based on whether the argument will fit in a single byte.
161 ;;; FIXME: This, like DUMP-FOP, should be a function with a
162 ;;; compiler-macro expansion.
163 (defmacro dump-fop* (n byte-fop word-fop file)
167 (dump-fop ',byte-fop ,n-file)
168 (dump-byte ,n-n ,n-file))
170 (dump-fop ',word-fop ,n-file)
171 (dump-unsigned-32 ,n-n ,n-file)))))
173 ;;; Push the object at table offset Handle on the fasl stack.
174 (defun dump-push (handle fasl-output)
175 (declare (type index handle) (type fasl-output fasl-output))
176 (dump-fop* handle fop-byte-push fop-push fasl-output)
179 ;;; Pop the object currently on the fasl stack top into the table, and
180 ;;; return the table index, incrementing the free pointer.
181 (defun dump-pop (fasl-output)
183 (fasl-output-table-free fasl-output)
184 (dump-fop 'fop-pop fasl-output)
185 (incf (fasl-output-table-free fasl-output))))
187 ;;; If X is in File's EQUAL-TABLE, then push the object and return T,
188 ;;; otherwise NIL. If *COLD-LOAD-DUMP* is true, then do nothing and
190 (defun equal-check-table (x fasl-output)
191 (declare (type fasl-output fasl-output))
192 (unless *cold-load-dump*
193 (let ((handle (gethash x (fasl-output-equal-table fasl-output))))
195 (dump-push handle fasl-output)
200 ;;; These functions are called after dumping an object to save the
201 ;;; object in the table. The object (also passed in as X) must already
202 ;;; be on the top of the FOP stack. If *COLD-LOAD-DUMP* is true, then
203 ;;; we don't do anything.
204 (defun eq-save-object (x fasl-output)
205 (declare (type fasl-output fasl-output))
206 (unless *cold-load-dump*
207 (let ((handle (dump-pop fasl-output)))
208 (setf (gethash x (fasl-output-eq-table fasl-output)) handle)
209 (dump-push handle fasl-output)))
211 (defun equal-save-object (x fasl-output)
212 (declare (type fasl-output fasl-output))
213 (unless *cold-load-dump*
214 (let ((handle (dump-pop fasl-output)))
215 (setf (gethash x (fasl-output-equal-table fasl-output)) handle)
216 (setf (gethash x (fasl-output-eq-table fasl-output)) handle)
217 (dump-push handle fasl-output)))
220 ;;; Record X in File's CIRCULARITY-TABLE unless *COLD-LOAD-DUMP* is
221 ;;; true. This is called on objects that we are about to dump might
222 ;;; have a circular path through them.
224 ;;; The object must not currently be in this table, since the dumper
225 ;;; should never be recursively called on a circular reference.
226 ;;; Instead, the dumping function must detect the circularity and
227 ;;; arrange for the dumped object to be patched.
228 (defun note-potential-circularity (x fasl-output)
229 (unless *cold-load-dump*
230 (let ((circ (fasl-output-circularity-table fasl-output)))
231 (aver (not (gethash x circ)))
232 (setf (gethash x circ) x)))
235 ;;; Dump FORM to a fasl file so that it evaluated at load time in normal
236 ;;; load and at cold-load time in cold load. This is used to dump package
238 (defun fasl-dump-cold-load-form (form fasl-output)
239 (declare (type fasl-output fasl-output))
240 (dump-fop 'fop-normal-load fasl-output)
241 (let ((*cold-load-dump* t))
242 (dump-object form fasl-output))
243 (dump-fop 'fop-eval-for-effect fasl-output)
244 (dump-fop 'fop-maybe-cold-load fasl-output)
247 ;;;; opening and closing fasl files
249 ;;; A utility function to write strings to (unsigned-byte 8) streams.
250 ;;; We restrict this to ASCII (with the averrance) because of
251 ;;; ambiguity of higher bytes: Unicode, some ISO-8859-x, or what? This
252 ;;; could be revisited in the event of doing funky things with stream
253 ;;; encodings -- CSR, 2002-04-25
254 (defun fasl-write-string (string stream)
255 (loop for char across string
256 do (let ((code (char-code char)))
257 (aver (<= 0 code 127))
258 (write-byte code stream))))
260 ;;; Open a fasl file, write its header, and return a FASL-OUTPUT
261 ;;; object for dumping to it. Some human-readable information about
262 ;;; the source code is given by the string WHERE. If BYTE-P is true,
263 ;;; this file will contain no native code, and is thus largely
264 ;;; implementation independent.
265 (defun open-fasl-output (name where)
266 (declare (type pathname name))
267 (let* ((stream (open name
269 :if-exists :supersede
270 :element-type 'sb!assem:assembly-unit))
271 (res (make-fasl-output :stream stream)))
273 ;; Begin the header with the constant machine-readable (and
274 ;; semi-human-readable) string which is used to identify fasl files.
275 (fasl-write-string *fasl-header-string-start-string* stream)
277 ;; The constant string which begins the header is followed by
278 ;; arbitrary human-readable text, terminated by a special
281 (with-standard-io-syntax
287 using ~A version ~A~%"
289 (format-universal-time nil (get-universal-time))
291 (sb!xc:lisp-implementation-type)
292 (sb!xc:lisp-implementation-version)))
294 (dump-byte +fasl-header-string-stop-char-code+ res)
296 ;; Finish the header by outputting fasl file implementation,
297 ;; version, and key *FEATURES*.
298 (flet ((dump-counted-string (string)
299 (dump-unsigned-32 (length string) res)
300 (dotimes (i (length string))
301 (dump-byte (char-code (aref string i)) res))))
302 (dump-counted-string (symbol-name +backend-fasl-file-implementation+))
303 (dump-unsigned-32 +fasl-file-version+ res)
304 (dump-counted-string *features-affecting-fasl-format*))
308 ;;; Close the specified FASL-OUTPUT, aborting the write if ABORT-P.
309 (defun close-fasl-output (fasl-output abort-p)
310 (declare (type fasl-output fasl-output))
313 (aver (zerop (hash-table-count (fasl-output-patch-table fasl-output))))
316 (dump-fop 'fop-verify-empty-stack fasl-output)
317 (dump-fop 'fop-verify-table-size fasl-output)
318 (dump-unsigned-32 (fasl-output-table-free fasl-output)
320 (dump-fop 'fop-end-group fasl-output)
322 ;; That's all, folks.
323 (close (fasl-output-stream fasl-output) :abort abort-p)
326 ;;;; main entries to object dumping
328 ;;; This function deals with dumping objects that are complex enough
329 ;;; so that we want to cache them in the table, rather than repeatedly
330 ;;; dumping them. If the object is in the EQ-TABLE, then we push it,
331 ;;; otherwise, we do a type dispatch to a type specific dumping
332 ;;; function. The type specific branches do any appropriate
333 ;;; EQUAL-TABLE check and table entry.
335 ;;; When we go to dump the object, we enter it in the CIRCULARITY-TABLE.
336 (defun dump-non-immediate-object (x file)
337 (let ((index (gethash x (fasl-output-eq-table file))))
338 (cond ((and index (not *cold-load-dump*))
339 (dump-push index file))
342 (symbol (dump-symbol x file))
344 ;; KLUDGE: The code in this case has been hacked
345 ;; to match Douglas Crosher's quick fix to CMU CL
346 ;; (on cmucl-imp 1999-12-27), applied in sbcl-0.6.8.11
347 ;; with help from Martin Atzmueller. This is not an
348 ;; ideal solution; to quote DTC,
349 ;; The compiler locks up trying to coalesce the
350 ;; constant lists. The hack below will disable the
351 ;; coalescing of lists while dumping and allows
352 ;; the code to compile. The real fix would be to
353 ;; take a little more care while dumping these.
354 ;; So if better list coalescing is needed, start here.
356 (if (cyclic-list-p x)
359 (eq-save-object x file))
360 (unless (equal-check-table x file)
362 (equal-save-object x file))))
365 (eq-save-object x file))
367 (dump-structure x file)
368 (eq-save-object x file))
370 ;; FIXME: The comment at the head of
371 ;; DUMP-NON-IMMEDIATE-OBJECT says it's for objects which
372 ;; we want to save, instead of repeatedly dumping them.
373 ;; But then we dump arrays here without doing anything
374 ;; like EQUAL-SAVE-OBJECT. What gives?
377 (unless (equal-check-table x file)
379 (ratio (dump-ratio x file))
380 (complex (dump-complex x file))
381 (float (dump-float x file))
382 (integer (dump-integer x file)))
383 (equal-save-object x file)))
385 ;; This probably never happens, since bad things tend to
386 ;; be detected during IR1 conversion.
387 (error "This object cannot be dumped into a fasl file:~% ~S"
391 ;;; Dump an object of any type by dispatching to the correct
392 ;;; type-specific dumping function. We pick off immediate objects,
393 ;;; symbols and and magic lists here. Other objects are handled by
394 ;;; DUMP-NON-IMMEDIATE-OBJECT.
396 ;;; This is the function used for recursive calls to the fasl dumper.
397 ;;; We don't worry about creating circularities here, since it is
398 ;;; assumed that there is a top level call to DUMP-OBJECT.
399 (defun sub-dump-object (x file)
402 (dump-non-immediate-object x file)
403 (dump-fop 'fop-empty-list file)))
406 (dump-fop 'fop-truth file)
407 (dump-non-immediate-object x file)))
408 ((fixnump x) (dump-integer x file))
409 ((characterp x) (dump-character x file))
411 (dump-non-immediate-object x file))))
413 ;;; Dump stuff to backpatch already dumped objects. INFOS is the list
414 ;;; of CIRCULARITY structures describing what to do. The patching FOPs
415 ;;; take the value to store on the stack. We compute this value by
416 ;;; fetching the enclosing object from the table, and then CDR'ing it
418 (defun dump-circularities (infos file)
419 (let ((table (fasl-output-eq-table file)))
422 (let* ((value (circularity-value info))
423 (enclosing (circularity-enclosing-object info)))
424 (dump-push (gethash enclosing table) file)
425 (unless (eq enclosing value)
426 (do ((current enclosing (cdr current))
429 (dump-fop 'fop-nthcdr file)
430 (dump-unsigned-32 i file))
431 (declare (type index i)))))
433 (ecase (circularity-type info)
434 (:rplaca (dump-fop 'fop-rplaca file))
435 (:rplacd (dump-fop 'fop-rplacd file))
436 (:svset (dump-fop 'fop-svset file))
437 (:struct-set (dump-fop 'fop-structset file)))
438 (dump-unsigned-32 (gethash (circularity-object info) table) file)
439 (dump-unsigned-32 (circularity-index info) file))))
441 ;;; Set up stuff for circularity detection, then dump an object. All
442 ;;; shared and circular structure will be exactly preserved within a
443 ;;; single call to DUMP-OBJECT. Sharing between objects dumped by
444 ;;; separate calls is only preserved when convenient.
446 ;;; We peek at the object type so that we only pay the circular
447 ;;; detection overhead on types of objects that might be circular.
448 (defun dump-object (x file)
449 (if (compound-object-p x)
450 (let ((*circularities-detected* ())
451 (circ (fasl-output-circularity-table file)))
453 (sub-dump-object x file)
454 (when *circularities-detected*
455 (dump-circularities *circularities-detected* file)
457 (sub-dump-object x file)))
459 ;;;; LOAD-TIME-VALUE and MAKE-LOAD-FORM support
461 ;;; Emit a funcall of the function and return the handle for the
463 (defun fasl-dump-load-time-value-lambda (fun file)
464 (declare (type sb!c::clambda fun) (type fasl-output file))
465 (let ((handle (gethash (sb!c::leaf-info fun)
466 (fasl-output-entry-table file))))
468 (dump-push handle file)
469 (dump-fop 'fop-funcall file)
473 ;;; Return T iff CONSTANT has not already been dumped. It's been
474 ;;; dumped if it's in the EQ table.
475 (defun fasl-constant-already-dumped-p (constant file)
476 (if (or (gethash constant (fasl-output-eq-table file))
477 (gethash constant (fasl-output-valid-structures file)))
481 ;;; Use HANDLE whenever we try to dump CONSTANT. HANDLE should have been
482 ;;; returned earlier by FASL-DUMP-LOAD-TIME-VALUE-LAMBDA.
483 (defun fasl-note-handle-for-constant (constant handle file)
484 (let ((table (fasl-output-eq-table file)))
485 (when (gethash constant table)
486 (error "~S already dumped?" constant))
487 (setf (gethash constant table) handle))
490 ;;; Note that the specified structure can just be dumped by
491 ;;; enumerating the slots.
492 (defun fasl-validate-structure (structure file)
493 (setf (gethash structure (fasl-output-valid-structures file)) t)
499 (defun dump-ratio (x file)
500 (sub-dump-object (numerator x) file)
501 (sub-dump-object (denominator x) file)
502 (dump-fop 'fop-ratio file))
505 (defun dump-integer (n file)
508 (dump-fop 'fop-byte-integer file)
509 (dump-byte (logand #xFF n) file))
511 (dump-fop 'fop-word-integer file)
512 (dump-unsigned-32 n file))
514 (dump-fop 'fop-word-integer file)
515 (dump-integer-as-n-bytes n 4 file))
517 (let ((bytes (ceiling (1+ (integer-length n)) 8)))
518 (dump-fop* bytes fop-small-integer fop-integer file)
519 (dump-integer-as-n-bytes n bytes file)))))
521 (defun dump-float (x file)
524 (dump-fop 'fop-single-float file)
525 (dump-integer-as-n-bytes (single-float-bits x) 4 file))
527 (dump-fop 'fop-double-float file)
529 (declare (double-float x))
530 ;; FIXME: Why sometimes DUMP-UNSIGNED-32 and sometimes
531 ;; DUMP-INTEGER-AS-N-BYTES .. 4?
532 (dump-unsigned-32 (double-float-low-bits x) file)
533 (dump-integer-as-n-bytes (double-float-high-bits x) 4 file)))
536 (dump-fop 'fop-long-float file)
537 (dump-long-float x file))))
539 (defun dump-complex (x file)
542 ((complex single-float)
543 (dump-fop 'fop-complex-single-float file)
544 (dump-integer-as-n-bytes (single-float-bits (realpart x)) 4 file)
545 (dump-integer-as-n-bytes (single-float-bits (imagpart x)) 4 file))
547 ((complex double-float)
548 (dump-fop 'fop-complex-double-float file)
549 (let ((re (realpart x)))
550 (declare (double-float re))
551 (dump-unsigned-32 (double-float-low-bits re) file)
552 (dump-integer-as-n-bytes (double-float-high-bits re) 4 file))
553 (let ((im (imagpart x)))
554 (declare (double-float im))
555 (dump-unsigned-32 (double-float-low-bits im) file)
556 (dump-integer-as-n-bytes (double-float-high-bits im) 4 file)))
558 ((complex long-float)
559 ;; (There's no easy way to mix #!+LONG-FLOAT and #-SB-XC-HOST
560 ;; conditionalization at read time, so we do this SB-XC-HOST
561 ;; conditional at runtime instead.)
562 #+sb-xc-host (error "can't dump COMPLEX-LONG-FLOAT in cross-compiler")
563 (dump-fop 'fop-complex-long-float file)
564 (dump-long-float (realpart x) file)
565 (dump-long-float (imagpart x) file))
567 (sub-dump-object (realpart x) file)
568 (sub-dump-object (imagpart x) file)
569 (dump-fop 'fop-complex file))))
573 ;;; Return the table index of PKG, adding the package to the table if
574 ;;; necessary. During cold load, we read the string as a normal string
575 ;;; so that we can do the package lookup at cold load time.
577 ;;; FIXME: Despite the parallelism in names, the functionality of
578 ;;; this function is not parallel to other functions DUMP-FOO, e.g.
579 ;;; DUMP-SYMBOL and DUMP-LIST. The mapping between names and behavior
580 ;;; should be made more consistent.
581 (declaim (ftype (function (package fasl-output) index) dump-package))
582 (defun dump-package (pkg file)
583 (declare (inline assoc))
584 (cond ((cdr (assoc pkg (fasl-output-packages file) :test #'eq)))
586 (unless *cold-load-dump*
587 (dump-fop 'fop-normal-load file))
588 (dump-simple-string (package-name pkg) file)
589 (dump-fop 'fop-package file)
590 (unless *cold-load-dump*
591 (dump-fop 'fop-maybe-cold-load file))
592 (let ((entry (dump-pop file)))
593 (push (cons pkg entry) (fasl-output-packages file))
598 ;;; Dump a list, setting up patching information when there are
599 ;;; circularities. We scan down the list, checking for CDR and CAR
602 ;;; If there is a CDR circularity, we terminate the list with NIL and
603 ;;; make a CIRCULARITY notation for the CDR of the previous cons.
605 ;;; If there is no CDR circularity, then we mark the current cons and
606 ;;; check for a CAR circularity. When there is a CAR circularity, we
607 ;;; make the CAR NIL initially, arranging for the current cons to be
610 ;;; Otherwise, we recursively call the dumper to dump the current
613 ;;; Marking of the conses is inhibited when *COLD-LOAD-DUMP* is true.
614 ;;; This inhibits all circularity detection.
615 (defun dump-list (list file)
617 (not (gethash list (fasl-output-circularity-table file)))))
618 (do* ((l list (cdr l))
620 (circ (fasl-output-circularity-table file)))
623 (terminate-undotted-list n file))
625 (sub-dump-object l file)
626 (terminate-dotted-list n file))))
627 (declare (type index n))
628 (let ((ref (gethash l circ)))
630 (push (make-circularity :type :rplacd
634 :enclosing-object ref)
635 *circularities-detected*)
636 (terminate-undotted-list n file)
639 (unless *cold-load-dump*
640 (setf (gethash l circ) list))
643 (ref (gethash obj circ)))
645 (push (make-circularity :type :rplaca
649 :enclosing-object ref)
650 *circularities-detected*)
651 (sub-dump-object nil file))
653 (sub-dump-object obj file))))))
655 (defun terminate-dotted-list (n file)
656 (declare (type index n) (type fasl-output file))
658 (1 (dump-fop 'fop-list*-1 file))
659 (2 (dump-fop 'fop-list*-2 file))
660 (3 (dump-fop 'fop-list*-3 file))
661 (4 (dump-fop 'fop-list*-4 file))
662 (5 (dump-fop 'fop-list*-5 file))
663 (6 (dump-fop 'fop-list*-6 file))
664 (7 (dump-fop 'fop-list*-7 file))
665 (8 (dump-fop 'fop-list*-8 file))
666 (T (do ((nn n (- nn 255)))
668 (dump-fop 'fop-list* file)
670 (declare (type index nn))
671 (dump-fop 'fop-list* file)
672 (dump-byte 255 file)))))
674 ;;; If N > 255, must build list with one LIST operator, then LIST*
677 (defun terminate-undotted-list (n file)
678 (declare (type index n) (type fasl-output file))
680 (1 (dump-fop 'fop-list-1 file))
681 (2 (dump-fop 'fop-list-2 file))
682 (3 (dump-fop 'fop-list-3 file))
683 (4 (dump-fop 'fop-list-4 file))
684 (5 (dump-fop 'fop-list-5 file))
685 (6 (dump-fop 'fop-list-6 file))
686 (7 (dump-fop 'fop-list-7 file))
687 (8 (dump-fop 'fop-list-8 file))
689 (dump-fop 'fop-list file)
691 (t (dump-fop 'fop-list file)
693 (do ((nn (- n 255) (- nn 255)))
695 (dump-fop 'fop-list* file)
697 (declare (type index nn))
698 (dump-fop 'fop-list* file)
699 (dump-byte 255 file)))))))
703 ;;; Dump the array thing.
704 (defun dump-array (x file)
707 (dump-multi-dim-array x file)))
709 ;;; Dump the vector object. If it's not simple, then actually dump a
710 ;;; simple version of it. But we enter the original in the EQ or EQUAL
712 (defun dump-vector (x file)
713 (let ((simple-version (if (array-header-p x)
714 (coerce x `(simple-array
715 ,(array-element-type x)
718 (typecase simple-version
720 (unless (equal-check-table x file)
721 (dump-simple-string simple-version file)
722 (equal-save-object x file)))
724 (dump-simple-vector simple-version file)
725 (eq-save-object x file))
726 ((simple-array single-float (*))
727 (dump-single-float-vector simple-version file)
728 (eq-save-object x file))
729 ((simple-array double-float (*))
730 (dump-double-float-vector simple-version file)
731 (eq-save-object x file))
733 ((simple-array long-float (*))
734 (dump-long-float-vector simple-version file)
735 (eq-save-object x file))
736 ((simple-array (complex single-float) (*))
737 (dump-complex-single-float-vector simple-version file)
738 (eq-save-object x file))
739 ((simple-array (complex double-float) (*))
740 (dump-complex-double-float-vector simple-version file)
741 (eq-save-object x file))
743 ((simple-array (complex long-float) (*))
744 (dump-complex-long-float-vector simple-version file)
745 (eq-save-object x file))
747 (dump-i-vector simple-version file)
748 (eq-save-object x file)))))
750 ;;; Dump a SIMPLE-VECTOR, handling any circularities.
751 (defun dump-simple-vector (v file)
752 (declare (type simple-vector v) (type fasl-output file))
753 (note-potential-circularity v file)
754 (do ((index 0 (1+ index))
756 (circ (fasl-output-circularity-table file)))
758 (dump-fop* length fop-small-vector fop-vector file))
759 (let* ((obj (aref v index))
760 (ref (gethash obj circ)))
762 (push (make-circularity :type :svset
766 :enclosing-object ref)
767 *circularities-detected*)
768 (sub-dump-object nil file))
770 (sub-dump-object obj file))))))
772 ;;; In the grand scheme of things I don't pretend to understand any
773 ;;; more how this works, or indeed whether. But to write out specialized
774 ;;; vectors in the same format as fop-int-vector expects to read them
775 ;;; we need to be target-endian. dump-integer-as-n-bytes always writes
776 ;;; little-endian (which is correct for all other integers) so for a bigendian
777 ;;; target we need to swap octets -- CSR, after DB
779 (defun octet-swap (word bits)
780 "BITS must be a multiple of 8"
781 (do ((input word (ash input -8))
782 (output 0 (logior (ash output 8) (logand input #xff)))
783 (bits bits (- bits 8)))
784 ((<= bits 0) output)))
786 (defun dump-i-vector (vec file &key data-only)
787 (declare (type (simple-array * (*)) vec))
788 (let ((len (length vec)))
789 (labels ((dump-unsigned-vector (size bytes)
791 (dump-fop 'fop-int-vector file)
792 (dump-unsigned-32 len file)
793 (dump-byte size file))
794 ;; The case which is easy to handle in a portable way is when
795 ;; the element size is a multiple of the output byte size, and
796 ;; happily that's the only case we need to be portable. (The
797 ;; cross-compiler has to output debug information (including
798 ;; (SIMPLE-ARRAY (UNSIGNED-BYTE 8) *).) The other cases are only
799 ;; needed in the target SBCL, so we let them be handled with
800 ;; unportable bit bashing.
801 (cond ((>= size 8) ; easy cases
802 (multiple-value-bind (floor rem) (floor size 8)
805 (dump-integer-as-n-bytes
806 (ecase sb!c:*backend-byte-order*
808 (:big-endian (octet-swap i size)))
810 (t ; harder cases, not supported in cross-compiler
811 (dump-raw-bytes vec bytes file))))
812 (dump-signed-vector (size bytes)
813 ;; Note: Dumping specialized signed vectors isn't
814 ;; supported in the cross-compiler. (All cases here end
815 ;; up trying to call DUMP-RAW-BYTES, which isn't
816 ;; provided in the cross-compilation host, only on the
819 (dump-fop 'fop-signed-int-vector file)
820 (dump-unsigned-32 len file)
821 (dump-byte size file))
822 (dump-raw-bytes vec bytes file)))
824 ;; KLUDGE: What exactly does the (ASH .. -3) stuff do? -- WHN 19990902
826 (dump-unsigned-vector 1 (ash (+ (the index len) 7) -3)))
827 ;; KLUDGE: This isn't the best way of expressing that the host
828 ;; may not have specializations for (unsigned-byte 2) and
829 ;; (unsigned-byte 4), which means that these types are
830 ;; type-equivalent to (simple-array (unsigned-byte 8) (*));
831 ;; the workaround is to remove them from the etypecase, since
832 ;; they can't be dumped from the cross-compiler anyway. --
835 ((simple-array (unsigned-byte 2) (*))
836 (dump-unsigned-vector 2 (ash (+ (the index (ash len 1)) 7) -3)))
838 ((simple-array (unsigned-byte 4) (*))
839 (dump-unsigned-vector 4 (ash (+ (the index (ash len 2)) 7) -3)))
840 ((simple-array (unsigned-byte 8) (*))
841 (dump-unsigned-vector 8 len))
842 ((simple-array (unsigned-byte 16) (*))
843 (dump-unsigned-vector 16 (* 2 len)))
844 ((simple-array (unsigned-byte 32) (*))
845 (dump-unsigned-vector 32 (* 4 len)))
846 ((simple-array (signed-byte 8) (*))
847 (dump-signed-vector 8 len))
848 ((simple-array (signed-byte 16) (*))
849 (dump-signed-vector 16 (* 2 len)))
850 ((simple-array (signed-byte 30) (*))
851 (dump-signed-vector 30 (* 4 len)))
852 ((simple-array (signed-byte 32) (*))
853 (dump-signed-vector 32 (* 4 len)))))))
855 ;;; Dump characters and string-ish things.
857 (defun dump-character (ch file)
858 (dump-fop 'fop-short-character file)
859 (dump-byte (char-code ch) file))
861 ;;; a helper function shared by DUMP-SIMPLE-STRING and DUMP-SYMBOL
862 (defun dump-characters-of-string (s fasl-output)
863 (declare (type string s) (type fasl-output fasl-output))
865 (dump-byte (char-code c) fasl-output))
868 ;;; Dump a SIMPLE-BASE-STRING.
869 ;;; FIXME: should be called DUMP-SIMPLE-BASE-STRING then
870 (defun dump-simple-string (s file)
871 (declare (type simple-base-string s))
872 (dump-fop* (length s) fop-small-string fop-string file)
873 (dump-characters-of-string s file)
876 ;;; If we get here, it is assumed that the symbol isn't in the table,
877 ;;; but we are responsible for putting it there when appropriate. To
878 ;;; avoid too much special-casing, we always push the symbol in the
879 ;;; table, but don't record that we have done so if *COLD-LOAD-DUMP*
881 (defun dump-symbol (s file)
882 (declare (type fasl-output file))
883 (let* ((pname (symbol-name s))
884 (pname-length (length pname))
885 (pkg (symbol-package s)))
888 (dump-fop* pname-length
889 fop-uninterned-small-symbol-save
890 fop-uninterned-symbol-save
892 ;; CMU CL had FOP-SYMBOL-SAVE/FOP-SMALL-SYMBOL-SAVE fops which
893 ;; used the current value of *PACKAGE*. Unfortunately that's
894 ;; broken w.r.t. ANSI Common Lisp semantics, so those are gone
896 ;;((eq pkg *package*)
897 ;; (dump-fop* pname-length
898 ;; fop-small-symbol-save
899 ;; fop-symbol-save file))
900 ((eq pkg sb!int:*cl-package*)
901 (dump-fop* pname-length
902 fop-lisp-small-symbol-save
905 ((eq pkg sb!int:*keyword-package*)
906 (dump-fop* pname-length
907 fop-keyword-small-symbol-save
908 fop-keyword-symbol-save
910 ((< pname-length 256)
911 (dump-fop* (dump-package pkg file)
912 fop-small-symbol-in-byte-package-save
913 fop-small-symbol-in-package-save
915 (dump-byte pname-length file))
917 (dump-fop* (dump-package pkg file)
918 fop-symbol-in-byte-package-save
919 fop-symbol-in-package-save
921 (dump-unsigned-32 pname-length file)))
923 (dump-characters-of-string pname file)
925 (unless *cold-load-dump*
926 (setf (gethash s (fasl-output-eq-table file))
927 (fasl-output-table-free file)))
929 (incf (fasl-output-table-free file)))
933 ;;;; component (function) dumping
935 (defun dump-segment (segment code-length fasl-output)
936 (declare (type sb!assem:segment segment)
937 (type fasl-output fasl-output))
938 (let* ((stream (fasl-output-stream fasl-output))
939 (n-written (write-segment-contents segment stream)))
940 ;; In CMU CL there was no enforced connection between the CODE-LENGTH
941 ;; argument and the number of bytes actually written. I added this
942 ;; assertion while trying to debug portable genesis. -- WHN 19990902
943 (unless (= code-length n-written)
944 (bug "code-length=~W, n-written=~W" code-length n-written)))
947 ;;; Dump all the fixups. Currently there are three flavors of fixup:
948 ;;; - assembly routines: named by a symbol
949 ;;; - foreign (C) symbols: named by a string
950 ;;; - code object references: don't need a name.
951 (defun dump-fixups (fixups fasl-output)
952 (declare (list fixups) (type fasl-output fasl-output))
953 (dolist (info fixups)
954 ;; FIXME: Packing data with LIST in NOTE-FIXUP and unpacking them
955 ;; with FIRST, SECOND, and THIRD here is hard to follow and
956 ;; maintain. Perhaps we could define a FIXUP-INFO structure to use
957 ;; instead, and rename *FIXUPS* to *FIXUP-INFO-LIST*?
958 (let* ((kind (first info))
959 (fixup (second info))
960 (name (fixup-name fixup))
961 (flavor (fixup-flavor fixup))
962 (offset (third info)))
963 ;; FIXME: This OFFSET is not what's called OFFSET in the FIXUP
964 ;; structure, it's what's called POSN in NOTE-FIXUP. (As far as
965 ;; I can tell, FIXUP-OFFSET is not actually an offset, it's an
966 ;; internal label used instead of NAME for :CODE-OBJECT fixups.
967 ;; Notice that in the :CODE-OBJECT case, NAME is ignored.)
968 (dump-fop 'fop-normal-load fasl-output)
969 (let ((*cold-load-dump* t))
970 (dump-object kind fasl-output))
971 (dump-fop 'fop-maybe-cold-load fasl-output)
972 ;; Depending on the flavor, we may have various kinds of
973 ;; noise before the offset.
976 (aver (symbolp name))
977 (dump-fop 'fop-normal-load fasl-output)
978 (let ((*cold-load-dump* t))
979 (dump-object name fasl-output))
980 (dump-fop 'fop-maybe-cold-load fasl-output)
981 (dump-fop 'fop-assembler-fixup fasl-output))
983 (aver (stringp name))
984 (dump-fop 'fop-foreign-fixup fasl-output)
985 (let ((len (length name)))
986 (aver (< len 256)) ; (limit imposed by fop definition)
987 (dump-byte len fasl-output)
989 (dump-byte (char-code (schar name i)) fasl-output))))
992 (dump-fop 'fop-code-object-fixup fasl-output)))
993 ;; No matter what the flavor, we'll always dump the offset.
994 (dump-unsigned-32 offset fasl-output)))
997 ;;; Dump out the constant pool and code-vector for component, push the
998 ;;; result in the table, and return the offset.
1000 ;;; The only tricky thing is handling constant-pool references to
1001 ;;; functions. If we have already dumped the function, then we just
1002 ;;; push the code pointer. Otherwise, we must create back-patching
1003 ;;; information so that the constant will be set when the function is
1004 ;;; eventually dumped. This is a bit awkward, since we don't have the
1005 ;;; handle for the code object being dumped while we are dumping its
1008 ;;; We dump trap objects in any unused slots or forward referenced slots.
1009 (defun dump-code-object (component
1016 (declare (type component component)
1017 (list trace-table-as-list)
1018 (type index code-length)
1019 (type fasl-output fasl-output))
1021 (let* ((2comp (component-info component))
1022 (constants (sb!c::ir2-component-constants 2comp))
1023 (header-length (length constants))
1024 (packed-trace-table (pack-trace-table trace-table-as-list))
1025 (total-length (+ code-length
1026 (* (length packed-trace-table)
1027 sb!c::tt-bytes-per-entry))))
1029 (collect ((patches))
1031 ;; Dump the offset of the trace table.
1032 (dump-object code-length fasl-output)
1033 ;; FIXME: As long as we don't have GENGC, the trace table is
1034 ;; hardwired to be empty. And SBCL doesn't have GENGC (and as
1035 ;; far as I know no modern CMU CL does either -- WHN
1036 ;; 2001-10-05). So might we be able to get rid of trace tables?
1038 ;; Dump the constants, noting any :ENTRY constants that have to
1040 (loop for i from sb!vm:code-constants-offset below header-length do
1041 (let ((entry (aref constants i)))
1044 (dump-object (sb!c::constant-value entry) fasl-output))
1048 (let* ((info (sb!c::leaf-info (cdr entry)))
1049 (handle (gethash info
1050 (fasl-output-entry-table
1052 (declare (type sb!c::entry-info info))
1055 (dump-push handle fasl-output))
1057 (patches (cons info i))
1058 (dump-fop 'fop-misc-trap fasl-output)))))
1060 (dump-push (cdr entry) fasl-output))
1062 (dump-object (cdr entry) fasl-output)
1063 (dump-fop 'fop-fdefinition fasl-output))))
1065 (dump-fop 'fop-misc-trap fasl-output)))))
1067 ;; Dump the debug info.
1068 (let ((info (sb!c::debug-info-for-component component))
1069 (*dump-only-valid-structures* nil))
1070 (dump-object info fasl-output)
1071 (let ((info-handle (dump-pop fasl-output)))
1072 (dump-push info-handle fasl-output)
1073 (push info-handle (fasl-output-debug-info fasl-output))))
1075 (let ((num-consts (- header-length sb!vm:code-trace-table-offset-slot)))
1076 (cond ((and (< num-consts #x100) (< total-length #x10000))
1077 (dump-fop 'fop-small-code fasl-output)
1078 (dump-byte num-consts fasl-output)
1079 (dump-integer-as-n-bytes total-length 2 fasl-output))
1081 (dump-fop 'fop-code fasl-output)
1082 (dump-unsigned-32 num-consts fasl-output)
1083 (dump-unsigned-32 total-length fasl-output))))
1085 ;; These two dumps are only ones which contribute to our
1086 ;; TOTAL-LENGTH value.
1087 (dump-segment code-segment code-length fasl-output)
1088 (dump-i-vector packed-trace-table fasl-output :data-only t)
1090 ;; DUMP-FIXUPS does its own internal DUMP-FOPs: the bytes it
1091 ;; dumps aren't included in the TOTAL-LENGTH passed to our
1092 ;; FOP-CODE/FOP-SMALL-CODE fop.
1093 (dump-fixups fixups fasl-output)
1095 (dump-fop 'fop-sanctify-for-execution fasl-output)
1097 (let ((handle (dump-pop fasl-output)))
1098 (dolist (patch (patches))
1099 (push (cons handle (cdr patch))
1100 (gethash (car patch)
1101 (fasl-output-patch-table fasl-output))))
1104 (defun dump-assembler-routines (code-segment length fixups routines file)
1105 (dump-fop 'fop-assembler-code file)
1106 (dump-unsigned-32 length file)
1107 (write-segment-contents code-segment (fasl-output-stream file))
1108 (dolist (routine routines)
1109 (dump-fop 'fop-normal-load file)
1110 (let ((*cold-load-dump* t))
1111 (dump-object (car routine) file))
1112 (dump-fop 'fop-maybe-cold-load file)
1113 (dump-fop 'fop-assembler-routine file)
1114 (dump-unsigned-32 (label-position (cdr routine)) file))
1115 (dump-fixups fixups file)
1116 (dump-fop 'fop-sanctify-for-execution file)
1119 ;;; Dump a function entry data structure corresponding to ENTRY to
1120 ;;; FILE. CODE-HANDLE is the table offset of the code object for the
1122 (defun dump-one-entry (entry code-handle file)
1123 (declare (type sb!c::entry-info entry) (type index code-handle)
1124 (type fasl-output file))
1125 (let ((name (sb!c::entry-info-name entry)))
1126 (dump-push code-handle file)
1127 (dump-object name file)
1128 (dump-object (sb!c::entry-info-arguments entry) file)
1129 (dump-object (sb!c::entry-info-type entry) file)
1130 (dump-fop 'fop-fun-entry file)
1131 (dump-unsigned-32 (label-position (sb!c::entry-info-offset entry)) file)
1134 ;;; Alter the code object referenced by CODE-HANDLE at the specified
1135 ;;; OFFSET, storing the object referenced by ENTRY-HANDLE.
1136 (defun dump-alter-code-object (code-handle offset entry-handle file)
1137 (declare (type index code-handle entry-handle offset))
1138 (declare (type fasl-output file))
1139 (dump-push code-handle file)
1140 (dump-push entry-handle file)
1141 (dump-fop* offset fop-byte-alter-code fop-alter-code file)
1144 ;;; Dump the code, constants, etc. for component. We pass in the
1145 ;;; assembler fixups, code vector and node info.
1146 (defun fasl-dump-component (component
1152 (declare (type component component) (list trace-table))
1153 (declare (type fasl-output file))
1155 (dump-fop 'fop-verify-empty-stack file)
1156 (dump-fop 'fop-verify-table-size file)
1157 (dump-unsigned-32 (fasl-output-table-free file) file)
1160 (let ((info (sb!c::ir2-component-dyncount-info (component-info component))))
1162 (fasl-validate-structure info file)))
1164 (let ((code-handle (dump-code-object component
1170 (2comp (component-info component)))
1171 (dump-fop 'fop-verify-empty-stack file)
1173 (dolist (entry (sb!c::ir2-component-entries 2comp))
1174 (let ((entry-handle (dump-one-entry entry code-handle file)))
1175 (setf (gethash entry (fasl-output-entry-table file)) entry-handle)
1176 (let ((old (gethash entry (fasl-output-patch-table file))))
1179 (dump-alter-code-object (car patch)
1183 (remhash entry (fasl-output-patch-table file)))))))
1186 (defun dump-push-previously-dumped-fun (fun fasl-output)
1187 (declare (type sb!c::clambda fun))
1188 (let ((handle (gethash (sb!c::leaf-info fun)
1189 (fasl-output-entry-table fasl-output))))
1191 (dump-push handle fasl-output))
1194 ;;; Dump a FOP-FUNCALL to call an already-dumped top level lambda at
1196 (defun fasl-dump-toplevel-lambda-call (fun fasl-output)
1197 (declare (type sb!c::clambda fun))
1198 (dump-push-previously-dumped-fun fun fasl-output)
1199 (dump-fop 'fop-funcall-for-effect fasl-output)
1200 (dump-byte 0 fasl-output)
1203 ;;; Dump a FOP-FSET to arrange static linkage (at cold init) between
1204 ;;; FUN-NAME and the already-dumped function whose dump handle is
1205 ;;; FUN-DUMP-HANDLE.
1207 (defun fasl-dump-cold-fset (fun-name fun-dump-handle fasl-output)
1208 (declare (type fixnum fun-dump-handle))
1209 (aver (legal-fun-name-p fun-name))
1210 (dump-non-immediate-object fun-name fasl-output)
1211 (dump-push fun-dump-handle fasl-output)
1212 (dump-fop 'fop-fset fasl-output)
1215 ;;; Compute the correct list of DEBUG-SOURCE structures and backpatch
1216 ;;; all of the dumped DEBUG-INFO structures. We clear the
1217 ;;; FASL-OUTPUT-DEBUG-INFO, so that subsequent components with
1218 ;;; different source info may be dumped.
1219 (defun fasl-dump-source-info (info fasl-output)
1220 (declare (type sb!c::source-info info))
1221 (let ((res (sb!c::debug-source-for-info info))
1222 (*dump-only-valid-structures* nil))
1223 (dump-object res fasl-output)
1224 (let ((res-handle (dump-pop fasl-output)))
1225 (dolist (info-handle (fasl-output-debug-info fasl-output))
1226 (dump-push res-handle fasl-output)
1227 (dump-fop 'fop-structset fasl-output)
1228 (dump-unsigned-32 info-handle fasl-output)
1229 (dump-unsigned-32 2 fasl-output))))
1230 (setf (fasl-output-debug-info fasl-output) nil)
1233 ;;;; dumping structures
1235 (defun dump-structure (struct file)
1236 (when *dump-only-valid-structures*
1237 (unless (gethash struct (fasl-output-valid-structures file))
1238 (error "attempt to dump invalid structure:~% ~S~%How did this happen?"
1240 (note-potential-circularity struct file)
1241 (do ((index 0 (1+ index))
1242 (length (%instance-length struct))
1243 (circ (fasl-output-circularity-table file)))
1245 (dump-fop* length fop-small-struct fop-struct file))
1246 (let* ((obj (%instance-ref struct index))
1247 (ref (gethash obj circ)))
1249 (push (make-circularity :type :struct-set
1253 :enclosing-object ref)
1254 *circularities-detected*)
1255 (sub-dump-object nil file))
1257 (sub-dump-object obj file))))))
1259 (defun dump-layout (obj file)
1260 (when (layout-invalid obj)
1261 (compiler-error "attempt to dump reference to obsolete class: ~S"
1262 (layout-class obj)))
1263 (let ((name (classoid-name (layout-classoid obj))))
1265 (compiler-error "dumping anonymous layout: ~S" obj))
1266 (dump-fop 'fop-normal-load file)
1267 (let ((*cold-load-dump* t))
1268 (dump-object name file))
1269 (dump-fop 'fop-maybe-cold-load file))
1270 (sub-dump-object (layout-inherits obj) file)
1271 (sub-dump-object (layout-depthoid obj) file)
1272 (sub-dump-object (layout-length obj) file)
1273 (dump-fop 'fop-layout file))