2 * C-level stuff to implement Lisp-level PURIFY
6 * This software is part of the SBCL system. See the README file for
9 * This software is derived from the CMU CL system, which was
10 * written at Carnegie Mellon University and released into the
11 * public domain. The software is in the public domain and is
12 * provided with absolutely no warranty. See the COPYING and CREDITS
13 * files for more information.
17 #include <sys/types.h>
20 #include <sys/ptrace.h>
21 #include <linux/user.h>
29 #include "interrupt.h"
33 #include "gc-internal.h"
35 #include "genesis/primitive-objects.h"
36 #include "genesis/static-symbols.h"
41 /* again, what's so special about the x86 that this is differently
42 * visible there than on other platforms? -dan 20010125
44 static lispobj
*dynamic_space_free_pointer
;
48 lose("GC invariant lost, file \"%s\", line %d", __FILE__, __LINE__)
51 #define gc_assert(ex) do { \
52 if (!(ex)) gc_abort(); \
59 /* These hold the original end of the read_only and static spaces so
60 * we can tell what are forwarding pointers. */
62 static lispobj
*read_only_end
, *static_end
;
64 static lispobj
*read_only_free
, *static_free
;
66 static lispobj
*pscav(lispobj
*addr
, int nwords
, boolean constant
);
68 #define LATERBLOCKSIZE 1020
69 #define LATERMAXCOUNT 10
78 } *later_blocks
= NULL
;
79 static int later_count
= 0;
81 #define CEILING(x,y) (((x) + ((y) - 1)) & (~((y) - 1)))
82 #define NWORDS(x,y) (CEILING((x),(y)) / (y))
84 /* FIXME: Shouldn't this be defined in sbcl.h? See also notes in
88 #define FUN_RAW_ADDR_OFFSET 0
90 #define FUN_RAW_ADDR_OFFSET (6*sizeof(lispobj) - FUN_POINTER_LOWTAG)
94 forwarding_pointer_p(lispobj obj
)
96 lispobj
*ptr
= native_pointer(obj
);
98 return ((static_end
<= ptr
&& ptr
<= static_free
) ||
99 (read_only_end
<= ptr
&& ptr
<= read_only_free
));
103 dynamic_pointer_p(lispobj ptr
)
106 return (ptr
>= (lispobj
)current_dynamic_space
108 ptr
< (lispobj
)dynamic_space_free_pointer
);
110 /* Be more conservative, and remember, this is a maybe. */
111 return (ptr
>= (lispobj
)DYNAMIC_SPACE_START
113 ptr
< (lispobj
)dynamic_space_free_pointer
);
120 #ifdef LISP_FEATURE_GENCGC
122 * enhanced x86/GENCGC stack scavenging by Douglas Crosher
124 * Scavenging the stack on the i386 is problematic due to conservative
125 * roots and raw return addresses. Here it is handled in two passes:
126 * the first pass runs before any objects are moved and tries to
127 * identify valid pointers and return address on the stack, the second
128 * pass scavenges these.
131 static unsigned pointer_filter_verbose
= 0;
133 /* FIXME: This is substantially the same code as in gencgc.c. (There
134 * are some differences, at least (1) the gencgc.c code needs to worry
135 * about return addresses on the stack pinning code objects, (2) the
136 * gencgc.c code needs to worry about the GC maybe happening in an
137 * interrupt service routine when the main thread of control was
138 * interrupted just as it had allocated memory and before it
139 * initialized it, while PURIFY needn't worry about that, and (3) the
140 * gencgc.c code has mutated more under maintenance since the fork
141 * from CMU CL than the code here has.) The two versions should be
142 * made to explicitly share common code, instead of just two different
143 * cut-and-pasted versions. */
145 valid_dynamic_space_pointer(lispobj
*pointer
, lispobj
*start_addr
)
147 /* If it's not a return address then it needs to be a valid Lisp
149 if (!is_lisp_pointer((lispobj
)pointer
))
152 /* Check that the object pointed to is consistent with the pointer
154 switch (lowtag_of((lispobj
)pointer
)) {
155 case FUN_POINTER_LOWTAG
:
156 /* Start_addr should be the enclosing code object, or a closure
158 switch (widetag_of(*start_addr
)) {
159 case CODE_HEADER_WIDETAG
:
160 /* This case is probably caught above. */
162 case CLOSURE_HEADER_WIDETAG
:
163 case FUNCALLABLE_INSTANCE_HEADER_WIDETAG
:
164 if ((int)pointer
!= ((int)start_addr
+FUN_POINTER_LOWTAG
)) {
165 if (pointer_filter_verbose
) {
166 fprintf(stderr
,"*Wf2: %x %x %x\n", (unsigned int) pointer
,
167 (unsigned int) start_addr
, *start_addr
);
173 if (pointer_filter_verbose
) {
174 fprintf(stderr
,"*Wf3: %x %x %x\n", (unsigned int) pointer
,
175 (unsigned int) start_addr
, *start_addr
);
180 case LIST_POINTER_LOWTAG
:
181 if ((int)pointer
!= ((int)start_addr
+LIST_POINTER_LOWTAG
)) {
182 if (pointer_filter_verbose
)
183 fprintf(stderr
,"*Wl1: %x %x %x\n", (unsigned int) pointer
,
184 (unsigned int) start_addr
, *start_addr
);
187 /* Is it plausible cons? */
188 if ((is_lisp_pointer(start_addr
[0])
189 || ((start_addr
[0] & 3) == 0) /* fixnum */
190 || (widetag_of(start_addr
[0]) == BASE_CHAR_WIDETAG
)
191 || (widetag_of(start_addr
[0]) == UNBOUND_MARKER_WIDETAG
))
192 && (is_lisp_pointer(start_addr
[1])
193 || ((start_addr
[1] & 3) == 0) /* fixnum */
194 || (widetag_of(start_addr
[1]) == BASE_CHAR_WIDETAG
)
195 || (widetag_of(start_addr
[1]) == UNBOUND_MARKER_WIDETAG
))) {
198 if (pointer_filter_verbose
) {
199 fprintf(stderr
,"*Wl2: %x %x %x\n", (unsigned int) pointer
,
200 (unsigned int) start_addr
, *start_addr
);
204 case INSTANCE_POINTER_LOWTAG
:
205 if ((int)pointer
!= ((int)start_addr
+INSTANCE_POINTER_LOWTAG
)) {
206 if (pointer_filter_verbose
) {
207 fprintf(stderr
,"*Wi1: %x %x %x\n", (unsigned int) pointer
,
208 (unsigned int) start_addr
, *start_addr
);
212 if (widetag_of(start_addr
[0]) != INSTANCE_HEADER_WIDETAG
) {
213 if (pointer_filter_verbose
) {
214 fprintf(stderr
,"*Wi2: %x %x %x\n", (unsigned int) pointer
,
215 (unsigned int) start_addr
, *start_addr
);
220 case OTHER_POINTER_LOWTAG
:
221 if ((int)pointer
!= ((int)start_addr
+OTHER_POINTER_LOWTAG
)) {
222 if (pointer_filter_verbose
) {
223 fprintf(stderr
,"*Wo1: %x %x %x\n", (unsigned int) pointer
,
224 (unsigned int) start_addr
, *start_addr
);
228 /* Is it plausible? Not a cons. XXX should check the headers. */
229 if (is_lisp_pointer(start_addr
[0]) || ((start_addr
[0] & 3) == 0)) {
230 if (pointer_filter_verbose
) {
231 fprintf(stderr
,"*Wo2: %x %x %x\n", (unsigned int) pointer
,
232 (unsigned int) start_addr
, *start_addr
);
236 switch (widetag_of(start_addr
[0])) {
237 case UNBOUND_MARKER_WIDETAG
:
238 case BASE_CHAR_WIDETAG
:
239 if (pointer_filter_verbose
) {
240 fprintf(stderr
,"*Wo3: %x %x %x\n", (unsigned int) pointer
,
241 (unsigned int) start_addr
, *start_addr
);
245 /* only pointed to by function pointers? */
246 case CLOSURE_HEADER_WIDETAG
:
247 case FUNCALLABLE_INSTANCE_HEADER_WIDETAG
:
248 if (pointer_filter_verbose
) {
249 fprintf(stderr
,"*Wo4: %x %x %x\n", (unsigned int) pointer
,
250 (unsigned int) start_addr
, *start_addr
);
254 case INSTANCE_HEADER_WIDETAG
:
255 if (pointer_filter_verbose
) {
256 fprintf(stderr
,"*Wo5: %x %x %x\n", (unsigned int) pointer
,
257 (unsigned int) start_addr
, *start_addr
);
261 /* the valid other immediate pointer objects */
262 case SIMPLE_VECTOR_WIDETAG
:
264 case COMPLEX_WIDETAG
:
265 #ifdef COMPLEX_SINGLE_FLOAT_WIDETAG
266 case COMPLEX_SINGLE_FLOAT_WIDETAG
:
268 #ifdef COMPLEX_DOUBLE_FLOAT_WIDETAG
269 case COMPLEX_DOUBLE_FLOAT_WIDETAG
:
271 #ifdef COMPLEX_LONG_FLOAT_WIDETAG
272 case COMPLEX_LONG_FLOAT_WIDETAG
:
274 case SIMPLE_ARRAY_WIDETAG
:
275 case COMPLEX_STRING_WIDETAG
:
276 case COMPLEX_BIT_VECTOR_WIDETAG
:
277 case COMPLEX_VECTOR_WIDETAG
:
278 case COMPLEX_ARRAY_WIDETAG
:
279 case VALUE_CELL_HEADER_WIDETAG
:
280 case SYMBOL_HEADER_WIDETAG
:
282 case CODE_HEADER_WIDETAG
:
284 case SINGLE_FLOAT_WIDETAG
:
285 case DOUBLE_FLOAT_WIDETAG
:
286 #ifdef LONG_FLOAT_WIDETAG
287 case LONG_FLOAT_WIDETAG
:
289 case SIMPLE_STRING_WIDETAG
:
290 case SIMPLE_BIT_VECTOR_WIDETAG
:
291 case SIMPLE_ARRAY_UNSIGNED_BYTE_2_WIDETAG
:
292 case SIMPLE_ARRAY_UNSIGNED_BYTE_4_WIDETAG
:
293 case SIMPLE_ARRAY_UNSIGNED_BYTE_8_WIDETAG
:
294 case SIMPLE_ARRAY_UNSIGNED_BYTE_16_WIDETAG
:
295 case SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG
:
296 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
297 case SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
:
299 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
300 case SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
:
302 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
303 case SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
:
305 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
306 case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
:
308 case SIMPLE_ARRAY_SINGLE_FLOAT_WIDETAG
:
309 case SIMPLE_ARRAY_DOUBLE_FLOAT_WIDETAG
:
310 #ifdef SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
311 case SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
:
313 #ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
314 case SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
:
316 #ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
317 case SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
:
319 #ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
320 case SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
:
323 case WEAK_POINTER_WIDETAG
:
327 if (pointer_filter_verbose
) {
328 fprintf(stderr
,"*Wo6: %x %x %x\n", (unsigned int) pointer
,
329 (unsigned int) start_addr
, *start_addr
);
335 if (pointer_filter_verbose
) {
336 fprintf(stderr
,"*W?: %x %x %x\n", (unsigned int) pointer
,
337 (unsigned int) start_addr
, *start_addr
);
346 #define MAX_STACK_POINTERS 256
347 lispobj
*valid_stack_locations
[MAX_STACK_POINTERS
];
348 unsigned int num_valid_stack_locations
;
350 #define MAX_STACK_RETURN_ADDRESSES 128
351 lispobj
*valid_stack_ra_locations
[MAX_STACK_RETURN_ADDRESSES
];
352 lispobj
*valid_stack_ra_code_objects
[MAX_STACK_RETURN_ADDRESSES
];
353 unsigned int num_valid_stack_ra_locations
;
355 /* Identify valid stack slots. */
357 setup_i386_stack_scav(lispobj
*lowaddr
, lispobj
*base
)
359 lispobj
*sp
= lowaddr
;
360 num_valid_stack_locations
= 0;
361 num_valid_stack_ra_locations
= 0;
362 for (sp
= lowaddr
; sp
< base
; sp
++) {
364 /* Find the object start address */
365 lispobj
*start_addr
= search_dynamic_space((void *)thing
);
367 /* We need to allow raw pointers into Code objects for
368 * return addresses. This will also pick up pointers to
369 * functions in code objects. */
370 if (widetag_of(*start_addr
) == CODE_HEADER_WIDETAG
) {
371 /* FIXME asserting here is a really dumb thing to do.
372 * If we've overflowed some arbitrary static limit, we
373 * should just refuse to purify, instead of killing
374 * the whole lisp session
376 gc_assert(num_valid_stack_ra_locations
<
377 MAX_STACK_RETURN_ADDRESSES
);
378 valid_stack_ra_locations
[num_valid_stack_ra_locations
] = sp
;
379 valid_stack_ra_code_objects
[num_valid_stack_ra_locations
++] =
380 (lispobj
*)((int)start_addr
+ OTHER_POINTER_LOWTAG
);
382 if (valid_dynamic_space_pointer((void *)thing
, start_addr
)) {
383 gc_assert(num_valid_stack_locations
< MAX_STACK_POINTERS
);
384 valid_stack_locations
[num_valid_stack_locations
++] = sp
;
389 if (pointer_filter_verbose
) {
390 fprintf(stderr
, "number of valid stack pointers = %d\n",
391 num_valid_stack_locations
);
392 fprintf(stderr
, "number of stack return addresses = %d\n",
393 num_valid_stack_ra_locations
);
398 pscav_i386_stack(void)
402 for (i
= 0; i
< num_valid_stack_locations
; i
++)
403 pscav(valid_stack_locations
[i
], 1, 0);
405 for (i
= 0; i
< num_valid_stack_ra_locations
; i
++) {
406 lispobj code_obj
= (lispobj
)valid_stack_ra_code_objects
[i
];
407 pscav(&code_obj
, 1, 0);
408 if (pointer_filter_verbose
) {
409 fprintf(stderr
,"*C moved RA %x to %x; for code object %x to %x\n",
410 *valid_stack_ra_locations
[i
],
411 (int)(*valid_stack_ra_locations
[i
])
412 - ((int)valid_stack_ra_code_objects
[i
] - (int)code_obj
),
413 (unsigned int) valid_stack_ra_code_objects
[i
], code_obj
);
415 *valid_stack_ra_locations
[i
] =
416 ((int)(*valid_stack_ra_locations
[i
])
417 - ((int)valid_stack_ra_code_objects
[i
] - (int)code_obj
));
425 pscav_later(lispobj
*where
, int count
)
429 if (count
> LATERMAXCOUNT
) {
430 while (count
> LATERMAXCOUNT
) {
431 pscav_later(where
, LATERMAXCOUNT
);
432 count
-= LATERMAXCOUNT
;
433 where
+= LATERMAXCOUNT
;
437 if (later_blocks
== NULL
|| later_count
== LATERBLOCKSIZE
||
438 (later_count
== LATERBLOCKSIZE
-1 && count
> 1)) {
439 new = (struct later
*)malloc(sizeof(struct later
));
440 new->next
= later_blocks
;
441 if (later_blocks
&& later_count
< LATERBLOCKSIZE
)
442 later_blocks
->u
[later_count
].ptr
= NULL
;
448 later_blocks
->u
[later_count
++].count
= count
;
449 later_blocks
->u
[later_count
++].ptr
= where
;
454 ptrans_boxed(lispobj thing
, lispobj header
, boolean constant
)
457 lispobj result
, *new, *old
;
459 nwords
= 1 + HeaderValue(header
);
462 old
= (lispobj
*)native_pointer(thing
);
464 new = read_only_free
;
465 read_only_free
+= CEILING(nwords
, 2);
469 static_free
+= CEILING(nwords
, 2);
473 bcopy(old
, new, nwords
* sizeof(lispobj
));
475 /* Deposit forwarding pointer. */
476 result
= make_lispobj(new, lowtag_of(thing
));
480 pscav(new, nwords
, constant
);
485 /* We need to look at the layout to see whether it is a pure structure
486 * class, and only then can we transport as constant. If it is pure,
487 * we can ALWAYS transport as a constant. */
489 ptrans_instance(lispobj thing
, lispobj header
, boolean constant
)
491 lispobj layout
= ((struct instance
*)native_pointer(thing
))->slots
[0];
492 lispobj pure
= ((struct instance
*)native_pointer(layout
))->slots
[15];
496 return (ptrans_boxed(thing
, header
, 1));
498 return (ptrans_boxed(thing
, header
, 0));
501 /* Substructure: special case for the COMPACT-INFO-ENVs,
502 * where the instance may have a point to the dynamic
503 * space placed into it (e.g. the cache-name slot), but
504 * the lists and arrays at the time of a purify can be
505 * moved to the RO space. */
507 lispobj result
, *new, *old
;
509 nwords
= 1 + HeaderValue(header
);
512 old
= (lispobj
*)native_pointer(thing
);
514 static_free
+= CEILING(nwords
, 2);
517 bcopy(old
, new, nwords
* sizeof(lispobj
));
519 /* Deposit forwarding pointer. */
520 result
= make_lispobj(new, lowtag_of(thing
));
524 pscav(new, nwords
, 1);
530 return NIL
; /* dummy value: return something ... */
535 ptrans_fdefn(lispobj thing
, lispobj header
)
538 lispobj result
, *new, *old
, oldfn
;
541 nwords
= 1 + HeaderValue(header
);
544 old
= (lispobj
*)native_pointer(thing
);
546 static_free
+= CEILING(nwords
, 2);
549 bcopy(old
, new, nwords
* sizeof(lispobj
));
551 /* Deposit forwarding pointer. */
552 result
= make_lispobj(new, lowtag_of(thing
));
555 /* Scavenge the function. */
556 fdefn
= (struct fdefn
*)new;
558 pscav(&fdefn
->fun
, 1, 0);
559 if ((char *)oldfn
+ FUN_RAW_ADDR_OFFSET
== fdefn
->raw_addr
)
560 fdefn
->raw_addr
= (char *)fdefn
->fun
+ FUN_RAW_ADDR_OFFSET
;
566 ptrans_unboxed(lispobj thing
, lispobj header
)
569 lispobj result
, *new, *old
;
571 nwords
= 1 + HeaderValue(header
);
574 old
= (lispobj
*)native_pointer(thing
);
575 new = read_only_free
;
576 read_only_free
+= CEILING(nwords
, 2);
579 bcopy(old
, new, nwords
* sizeof(lispobj
));
581 /* Deposit forwarding pointer. */
582 result
= make_lispobj(new , lowtag_of(thing
));
589 ptrans_vector(lispobj thing
, int bits
, int extra
,
590 boolean boxed
, boolean constant
)
592 struct vector
*vector
;
594 lispobj result
, *new;
596 vector
= (struct vector
*)native_pointer(thing
);
597 nwords
= 2 + (CEILING((fixnum_value(vector
->length
)+extra
)*bits
,32)>>5);
599 if (boxed
&& !constant
) {
601 static_free
+= CEILING(nwords
, 2);
604 new = read_only_free
;
605 read_only_free
+= CEILING(nwords
, 2);
608 bcopy(vector
, new, nwords
* sizeof(lispobj
));
610 result
= make_lispobj(new, lowtag_of(thing
));
611 vector
->header
= result
;
614 pscav(new, nwords
, constant
);
621 apply_code_fixups_during_purify(struct code
*old_code
, struct code
*new_code
)
623 int nheader_words
, ncode_words
, nwords
;
624 void *constants_start_addr
, *constants_end_addr
;
625 void *code_start_addr
, *code_end_addr
;
626 lispobj fixups
= NIL
;
627 unsigned displacement
= (unsigned)new_code
- (unsigned)old_code
;
628 struct vector
*fixups_vector
;
630 ncode_words
= fixnum_value(new_code
->code_size
);
631 nheader_words
= HeaderValue(*(lispobj
*)new_code
);
632 nwords
= ncode_words
+ nheader_words
;
634 constants_start_addr
= (void *)new_code
+ 5*4;
635 constants_end_addr
= (void *)new_code
+ nheader_words
*4;
636 code_start_addr
= (void *)new_code
+ nheader_words
*4;
637 code_end_addr
= (void *)new_code
+ nwords
*4;
639 /* The first constant should be a pointer to the fixups for this
640 * code objects. Check. */
641 fixups
= new_code
->constants
[0];
643 /* It will be 0 or the unbound-marker if there are no fixups, and
644 * will be an other-pointer to a vector if it is valid. */
646 (fixups
==UNBOUND_MARKER_WIDETAG
) ||
647 !is_lisp_pointer(fixups
)) {
648 #ifdef LISP_FEATURE_GENCGC
649 /* Check for a possible errors. */
650 sniff_code_object(new_code
,displacement
);
655 fixups_vector
= (struct vector
*)native_pointer(fixups
);
657 /* Could be pointing to a forwarding pointer. */
658 if (is_lisp_pointer(fixups
) && (dynamic_pointer_p(fixups
))
659 && forwarding_pointer_p(*(lispobj
*)fixups_vector
)) {
660 /* If so then follow it. */
662 (struct vector
*)native_pointer(*(lispobj
*)fixups_vector
);
665 if (widetag_of(fixups_vector
->header
) ==
666 SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG
) {
667 /* We got the fixups for the code block. Now work through the
668 * vector, and apply a fixup at each address. */
669 int length
= fixnum_value(fixups_vector
->length
);
671 for (i
=0; i
<length
; i
++) {
672 unsigned offset
= fixups_vector
->data
[i
];
673 /* Now check the current value of offset. */
675 *(unsigned *)((unsigned)code_start_addr
+ offset
);
677 /* If it's within the old_code object then it must be an
678 * absolute fixup (relative ones are not saved) */
679 if ((old_value
>=(unsigned)old_code
)
680 && (old_value
<((unsigned)old_code
+ nwords
*4)))
681 /* So add the dispacement. */
682 *(unsigned *)((unsigned)code_start_addr
+ offset
) = old_value
685 /* It is outside the old code object so it must be a relative
686 * fixup (absolute fixups are not saved). So subtract the
688 *(unsigned *)((unsigned)code_start_addr
+ offset
) = old_value
693 /* No longer need the fixups. */
694 new_code
->constants
[0] = 0;
696 #ifdef LISP_FEATURE_GENCGC
697 /* Check for possible errors. */
698 sniff_code_object(new_code
,displacement
);
704 ptrans_code(lispobj thing
)
706 struct code
*code
, *new;
708 lispobj func
, result
;
710 code
= (struct code
*)native_pointer(thing
);
711 nwords
= HeaderValue(code
->header
) + fixnum_value(code
->code_size
);
713 new = (struct code
*)read_only_free
;
714 read_only_free
+= CEILING(nwords
, 2);
716 bcopy(code
, new, nwords
* sizeof(lispobj
));
718 #ifdef LISP_FEATURE_X86
719 apply_code_fixups_during_purify(code
,new);
722 result
= make_lispobj(new, OTHER_POINTER_LOWTAG
);
724 /* Stick in a forwarding pointer for the code object. */
725 *(lispobj
*)code
= result
;
727 /* Put in forwarding pointers for all the functions. */
728 for (func
= code
->entry_points
;
730 func
= ((struct simple_fun
*)native_pointer(func
))->next
) {
732 gc_assert(lowtag_of(func
) == FUN_POINTER_LOWTAG
);
734 *(lispobj
*)native_pointer(func
) = result
+ (func
- thing
);
737 /* Arrange to scavenge the debug info later. */
738 pscav_later(&new->debug_info
, 1);
740 if (new->trace_table_offset
& 0x3)
742 pscav(&new->trace_table_offset
, 1, 0);
744 new->trace_table_offset
= NIL
; /* limit lifetime */
747 /* Scavenge the constants. */
748 pscav(new->constants
, HeaderValue(new->header
)-5, 1);
750 /* Scavenge all the functions. */
751 pscav(&new->entry_points
, 1, 1);
752 for (func
= new->entry_points
;
754 func
= ((struct simple_fun
*)native_pointer(func
))->next
) {
755 gc_assert(lowtag_of(func
) == FUN_POINTER_LOWTAG
);
756 gc_assert(!dynamic_pointer_p(func
));
759 /* Temporarly convert the self pointer to a real function pointer. */
760 ((struct simple_fun
*)native_pointer(func
))->self
761 -= FUN_RAW_ADDR_OFFSET
;
763 pscav(&((struct simple_fun
*)native_pointer(func
))->self
, 2, 1);
765 ((struct simple_fun
*)native_pointer(func
))->self
766 += FUN_RAW_ADDR_OFFSET
;
768 pscav_later(&((struct simple_fun
*)native_pointer(func
))->name
, 3);
775 ptrans_func(lispobj thing
, lispobj header
)
778 lispobj code
, *new, *old
, result
;
779 struct simple_fun
*function
;
781 /* Thing can either be a function header, a closure function
782 * header, a closure, or a funcallable-instance. If it's a closure
783 * or a funcallable-instance, we do the same as ptrans_boxed.
784 * Otherwise we have to do something strange, 'cause it is buried
785 * inside a code object. */
787 if (widetag_of(header
) == SIMPLE_FUN_HEADER_WIDETAG
||
788 widetag_of(header
) == CLOSURE_FUN_HEADER_WIDETAG
) {
790 /* We can only end up here if the code object has not been
791 * scavenged, because if it had been scavenged, forwarding pointers
792 * would have been left behind for all the entry points. */
794 function
= (struct simple_fun
*)native_pointer(thing
);
797 ((native_pointer(thing
) -
798 (HeaderValue(function
->header
))), OTHER_POINTER_LOWTAG
);
800 /* This will cause the function's header to be replaced with a
801 * forwarding pointer. */
805 /* So we can just return that. */
806 return function
->header
;
809 /* It's some kind of closure-like thing. */
810 nwords
= 1 + HeaderValue(header
);
811 old
= (lispobj
*)native_pointer(thing
);
813 /* Allocate the new one. */
814 if (widetag_of(header
) == FUNCALLABLE_INSTANCE_HEADER_WIDETAG
) {
815 /* FINs *must* not go in read_only space. */
817 static_free
+= CEILING(nwords
, 2);
820 /* Closures can always go in read-only space, 'cause they
823 new = read_only_free
;
824 read_only_free
+= CEILING(nwords
, 2);
827 bcopy(old
, new, nwords
* sizeof(lispobj
));
829 /* Deposit forwarding pointer. */
830 result
= make_lispobj(new, lowtag_of(thing
));
834 pscav(new, nwords
, 0);
841 ptrans_returnpc(lispobj thing
, lispobj header
)
845 /* Find the corresponding code object. */
846 code
= thing
- HeaderValue(header
)*sizeof(lispobj
);
848 /* Make sure it's been transported. */
849 new = *(lispobj
*)native_pointer(code
);
850 if (!forwarding_pointer_p(new))
851 new = ptrans_code(code
);
853 /* Maintain the offset: */
854 return new + (thing
- code
);
857 #define WORDS_PER_CONS CEILING(sizeof(struct cons) / sizeof(lispobj), 2)
860 ptrans_list(lispobj thing
, boolean constant
)
862 struct cons
*old
, *new, *orig
;
866 orig
= (struct cons
*)read_only_free
;
868 orig
= (struct cons
*)static_free
;
872 /* Allocate a new cons cell. */
873 old
= (struct cons
*)native_pointer(thing
);
875 new = (struct cons
*)read_only_free
;
876 read_only_free
+= WORDS_PER_CONS
;
879 new = (struct cons
*)static_free
;
880 static_free
+= WORDS_PER_CONS
;
883 /* Copy the cons cell and keep a pointer to the cdr. */
885 thing
= new->cdr
= old
->cdr
;
887 /* Set up the forwarding pointer. */
888 *(lispobj
*)old
= make_lispobj(new, LIST_POINTER_LOWTAG
);
890 /* And count this cell. */
892 } while (lowtag_of(thing
) == LIST_POINTER_LOWTAG
&&
893 dynamic_pointer_p(thing
) &&
894 !(forwarding_pointer_p(*(lispobj
*)native_pointer(thing
))));
896 /* Scavenge the list we just copied. */
897 pscav((lispobj
*)orig
, length
* WORDS_PER_CONS
, constant
);
899 return make_lispobj(orig
, LIST_POINTER_LOWTAG
);
903 ptrans_otherptr(lispobj thing
, lispobj header
, boolean constant
)
905 switch (widetag_of(header
)) {
907 case SINGLE_FLOAT_WIDETAG
:
908 case DOUBLE_FLOAT_WIDETAG
:
909 #ifdef LONG_FLOAT_WIDETAG
910 case LONG_FLOAT_WIDETAG
:
912 #ifdef COMPLEX_SINGLE_FLOAT_WIDETAG
913 case COMPLEX_SINGLE_FLOAT_WIDETAG
:
915 #ifdef COMPLEX_DOUBLE_FLOAT_WIDETAG
916 case COMPLEX_DOUBLE_FLOAT_WIDETAG
:
918 #ifdef COMPLEX_LONG_FLOAT_WIDETAG
919 case COMPLEX_LONG_FLOAT_WIDETAG
:
922 return ptrans_unboxed(thing
, header
);
925 case COMPLEX_WIDETAG
:
926 case SIMPLE_ARRAY_WIDETAG
:
927 case COMPLEX_STRING_WIDETAG
:
928 case COMPLEX_VECTOR_WIDETAG
:
929 case COMPLEX_ARRAY_WIDETAG
:
930 return ptrans_boxed(thing
, header
, constant
);
932 case VALUE_CELL_HEADER_WIDETAG
:
933 case WEAK_POINTER_WIDETAG
:
934 return ptrans_boxed(thing
, header
, 0);
936 case SYMBOL_HEADER_WIDETAG
:
937 return ptrans_boxed(thing
, header
, 0);
939 case SIMPLE_STRING_WIDETAG
:
940 return ptrans_vector(thing
, 8, 1, 0, constant
);
942 case SIMPLE_BIT_VECTOR_WIDETAG
:
943 return ptrans_vector(thing
, 1, 0, 0, constant
);
945 case SIMPLE_VECTOR_WIDETAG
:
946 return ptrans_vector(thing
, 32, 0, 1, constant
);
948 case SIMPLE_ARRAY_UNSIGNED_BYTE_2_WIDETAG
:
949 return ptrans_vector(thing
, 2, 0, 0, constant
);
951 case SIMPLE_ARRAY_UNSIGNED_BYTE_4_WIDETAG
:
952 return ptrans_vector(thing
, 4, 0, 0, constant
);
954 case SIMPLE_ARRAY_UNSIGNED_BYTE_8_WIDETAG
:
955 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
956 case SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
:
958 return ptrans_vector(thing
, 8, 0, 0, constant
);
960 case SIMPLE_ARRAY_UNSIGNED_BYTE_16_WIDETAG
:
961 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
962 case SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
:
964 return ptrans_vector(thing
, 16, 0, 0, constant
);
966 case SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG
:
967 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
968 case SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
:
970 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
971 case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
:
973 return ptrans_vector(thing
, 32, 0, 0, constant
);
975 case SIMPLE_ARRAY_SINGLE_FLOAT_WIDETAG
:
976 return ptrans_vector(thing
, 32, 0, 0, constant
);
978 case SIMPLE_ARRAY_DOUBLE_FLOAT_WIDETAG
:
979 return ptrans_vector(thing
, 64, 0, 0, constant
);
981 #ifdef SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
982 case SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
:
984 return ptrans_vector(thing
, 96, 0, 0, constant
);
987 return ptrans_vector(thing
, 128, 0, 0, constant
);
991 #ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
992 case SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
:
993 return ptrans_vector(thing
, 64, 0, 0, constant
);
996 #ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
997 case SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
:
998 return ptrans_vector(thing
, 128, 0, 0, constant
);
1001 #ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
1002 case SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
:
1004 return ptrans_vector(thing
, 192, 0, 0, constant
);
1007 return ptrans_vector(thing
, 256, 0, 0, constant
);
1011 case CODE_HEADER_WIDETAG
:
1012 return ptrans_code(thing
);
1014 case RETURN_PC_HEADER_WIDETAG
:
1015 return ptrans_returnpc(thing
, header
);
1018 return ptrans_fdefn(thing
, header
);
1021 /* Should only come across other pointers to the above stuff. */
1028 pscav_fdefn(struct fdefn
*fdefn
)
1032 fix_func
= ((char *)(fdefn
->fun
+FUN_RAW_ADDR_OFFSET
) == fdefn
->raw_addr
);
1033 pscav(&fdefn
->name
, 1, 1);
1034 pscav(&fdefn
->fun
, 1, 0);
1036 fdefn
->raw_addr
= (char *)(fdefn
->fun
+ FUN_RAW_ADDR_OFFSET
);
1037 return sizeof(struct fdefn
) / sizeof(lispobj
);
1041 /* now putting code objects in static space */
1043 pscav_code(struct code
*code
)
1047 nwords
= HeaderValue(code
->header
) + fixnum_value(code
->code_size
);
1049 /* Arrange to scavenge the debug info later. */
1050 pscav_later(&code
->debug_info
, 1);
1052 /* Scavenge the constants. */
1053 pscav(code
->constants
, HeaderValue(code
->header
)-5, 1);
1055 /* Scavenge all the functions. */
1056 pscav(&code
->entry_points
, 1, 1);
1057 for (func
= code
->entry_points
;
1059 func
= ((struct simple_fun
*)native_pointer(func
))->next
) {
1060 gc_assert(lowtag_of(func
) == FUN_POINTER_LOWTAG
);
1061 gc_assert(!dynamic_pointer_p(func
));
1064 /* Temporarly convert the self pointer to a real function
1066 ((struct simple_fun
*)native_pointer(func
))->self
1067 -= FUN_RAW_ADDR_OFFSET
;
1069 pscav(&((struct simple_fun
*)native_pointer(func
))->self
, 2, 1);
1071 ((struct simple_fun
*)native_pointer(func
))->self
1072 += FUN_RAW_ADDR_OFFSET
;
1074 pscav_later(&((struct simple_fun
*)native_pointer(func
))->name
, 3);
1077 return CEILING(nwords
,2);
1082 pscav(lispobj
*addr
, int nwords
, boolean constant
)
1084 lispobj thing
, *thingp
, header
;
1085 int count
= 0; /* (0 = dummy init value to stop GCC warning) */
1086 struct vector
*vector
;
1088 while (nwords
> 0) {
1090 if (is_lisp_pointer(thing
)) {
1091 /* It's a pointer. Is it something we might have to move? */
1092 if (dynamic_pointer_p(thing
)) {
1093 /* Maybe. Have we already moved it? */
1094 thingp
= (lispobj
*)native_pointer(thing
);
1096 if (is_lisp_pointer(header
) && forwarding_pointer_p(header
))
1097 /* Yep, so just copy the forwarding pointer. */
1100 /* Nope, copy the object. */
1101 switch (lowtag_of(thing
)) {
1102 case FUN_POINTER_LOWTAG
:
1103 thing
= ptrans_func(thing
, header
);
1106 case LIST_POINTER_LOWTAG
:
1107 thing
= ptrans_list(thing
, constant
);
1110 case INSTANCE_POINTER_LOWTAG
:
1111 thing
= ptrans_instance(thing
, header
, constant
);
1114 case OTHER_POINTER_LOWTAG
:
1115 thing
= ptrans_otherptr(thing
, header
, constant
);
1119 /* It was a pointer, but not one of them? */
1127 else if (thing
& 3) {
1128 /* It's an other immediate. Maybe the header for an unboxed */
1130 switch (widetag_of(thing
)) {
1131 case BIGNUM_WIDETAG
:
1132 case SINGLE_FLOAT_WIDETAG
:
1133 case DOUBLE_FLOAT_WIDETAG
:
1134 #ifdef LONG_FLOAT_WIDETAG
1135 case LONG_FLOAT_WIDETAG
:
1138 /* It's an unboxed simple object. */
1139 count
= HeaderValue(thing
)+1;
1142 case SIMPLE_VECTOR_WIDETAG
:
1143 if (HeaderValue(thing
) == subtype_VectorValidHashing
) {
1144 *addr
= (subtype_VectorMustRehash
<< N_WIDETAG_BITS
) |
1145 SIMPLE_VECTOR_WIDETAG
;
1150 case SIMPLE_STRING_WIDETAG
:
1151 vector
= (struct vector
*)addr
;
1152 count
= CEILING(NWORDS(fixnum_value(vector
->length
)+1,4)+2,2);
1155 case SIMPLE_BIT_VECTOR_WIDETAG
:
1156 vector
= (struct vector
*)addr
;
1157 count
= CEILING(NWORDS(fixnum_value(vector
->length
),32)+2,2);
1160 case SIMPLE_ARRAY_UNSIGNED_BYTE_2_WIDETAG
:
1161 vector
= (struct vector
*)addr
;
1162 count
= CEILING(NWORDS(fixnum_value(vector
->length
),16)+2,2);
1165 case SIMPLE_ARRAY_UNSIGNED_BYTE_4_WIDETAG
:
1166 vector
= (struct vector
*)addr
;
1167 count
= CEILING(NWORDS(fixnum_value(vector
->length
),8)+2,2);
1170 case SIMPLE_ARRAY_UNSIGNED_BYTE_8_WIDETAG
:
1171 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
1172 case SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
:
1174 vector
= (struct vector
*)addr
;
1175 count
= CEILING(NWORDS(fixnum_value(vector
->length
),4)+2,2);
1178 case SIMPLE_ARRAY_UNSIGNED_BYTE_16_WIDETAG
:
1179 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
1180 case SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
:
1182 vector
= (struct vector
*)addr
;
1183 count
= CEILING(NWORDS(fixnum_value(vector
->length
),2)+2,2);
1186 case SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG
:
1187 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
1188 case SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
:
1190 #ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
1191 case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
:
1193 vector
= (struct vector
*)addr
;
1194 count
= CEILING(fixnum_value(vector
->length
)+2,2);
1197 case SIMPLE_ARRAY_SINGLE_FLOAT_WIDETAG
:
1198 vector
= (struct vector
*)addr
;
1199 count
= CEILING(fixnum_value(vector
->length
)+2,2);
1202 case SIMPLE_ARRAY_DOUBLE_FLOAT_WIDETAG
:
1203 #ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
1204 case SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
:
1206 vector
= (struct vector
*)addr
;
1207 count
= fixnum_value(vector
->length
)*2+2;
1210 #ifdef SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
1211 case SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
:
1212 vector
= (struct vector
*)addr
;
1214 count
= fixnum_value(vector
->length
)*3+2;
1217 count
= fixnum_value(vector
->length
)*4+2;
1222 #ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
1223 case SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
:
1224 vector
= (struct vector
*)addr
;
1225 count
= fixnum_value(vector
->length
)*4+2;
1229 #ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
1230 case SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
:
1231 vector
= (struct vector
*)addr
;
1233 count
= fixnum_value(vector
->length
)*6+2;
1236 count
= fixnum_value(vector
->length
)*8+2;
1241 case CODE_HEADER_WIDETAG
:
1243 gc_abort(); /* no code headers in static space */
1245 count
= pscav_code((struct code
*)addr
);
1249 case SIMPLE_FUN_HEADER_WIDETAG
:
1250 case CLOSURE_FUN_HEADER_WIDETAG
:
1251 case RETURN_PC_HEADER_WIDETAG
:
1252 /* We should never hit any of these, 'cause they occur
1253 * buried in the middle of code objects. */
1258 case CLOSURE_HEADER_WIDETAG
:
1259 case FUNCALLABLE_INSTANCE_HEADER_WIDETAG
:
1260 /* The function self pointer needs special care on the
1261 * x86 because it is the real entry point. */
1263 lispobj fun
= ((struct closure
*)addr
)->fun
1264 - FUN_RAW_ADDR_OFFSET
;
1265 pscav(&fun
, 1, constant
);
1266 ((struct closure
*)addr
)->fun
= fun
+ FUN_RAW_ADDR_OFFSET
;
1272 case WEAK_POINTER_WIDETAG
:
1273 /* Weak pointers get preserved during purify, 'cause I
1274 * don't feel like figuring out how to break them. */
1275 pscav(addr
+1, 2, constant
);
1280 /* We have to handle fdefn objects specially, so we
1281 * can fix up the raw function address. */
1282 count
= pscav_fdefn((struct fdefn
*)addr
);
1291 /* It's a fixnum. */
1303 purify(lispobj static_roots
, lispobj read_only_roots
)
1307 struct later
*laters
, *next
;
1308 struct thread
*thread
;
1311 printf("[doing purification:");
1314 #ifdef LISP_FEATURE_GENCGC
1315 gc_alloc_update_all_page_tables();
1317 for_each_thread(thread
)
1318 if (fixnum_value(SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX
,thread
)) != 0) {
1319 /* FIXME: 1. What does this mean? 2. It shouldn't be reporting
1320 * its error simply by a. printing a string b. to stdout instead
1322 printf(" Ack! Can't purify interrupt contexts. ");
1327 #if defined(__i386__)
1328 dynamic_space_free_pointer
=
1329 (lispobj
*)SymbolValue(ALLOCATION_POINTER
,0);
1332 read_only_end
= read_only_free
=
1333 (lispobj
*)SymbolValue(READ_ONLY_SPACE_FREE_POINTER
,0);
1334 static_end
= static_free
=
1335 (lispobj
*)SymbolValue(STATIC_SPACE_FREE_POINTER
,0);
1343 /* can't do this unless the threads in question are suspended with
1346 #if (defined(LISP_FEATURE_GENCGC) && defined(LISP_FEATURE_X86))
1347 for_each_thread(thread
) {
1349 struct user_regs_struct regs
;
1350 if(ptrace(PTRACE_GETREGS
,thread
->pid
,0,®s
)){
1351 fprintf(stderr
,"child pid %d, %s\n",thread
->pid
,strerror(errno
));
1352 lose("PTRACE_GETREGS");
1354 setup_i386_stack_scav(regs
.ebp
,
1355 ((void *)thread
->control_stack_start
)
1356 +THREAD_CONTROL_STACK_SIZE
);
1360 setup_i386_stack_scav(((&static_roots
)-2),
1361 ((void *)all_threads
->control_stack_start
)
1362 +THREAD_CONTROL_STACK_SIZE
);
1366 pscav(&static_roots
, 1, 0);
1367 pscav(&read_only_roots
, 1, 1);
1370 printf(" handlers");
1373 pscav((lispobj
*) all_threads
->interrupt_data
->interrupt_handlers
,
1374 sizeof(all_threads
->interrupt_data
->interrupt_handlers
)
1383 pscav((lispobj
*)CONTROL_STACK_START
,
1384 current_control_stack_pointer
- (lispobj
*)CONTROL_STACK_START
,
1387 #ifdef LISP_FEATURE_GENCGC
1393 printf(" bindings");
1396 #if !defined(__i386__)
1397 pscav( (lispobj
*)BINDING_STACK_START
,
1398 (lispobj
*)current_binding_stack_pointer
- (lispobj
*)BINDING_STACK_START
,
1401 for_each_thread(thread
) {
1402 pscav( (lispobj
*)thread
->binding_stack_start
,
1403 (lispobj
*)SymbolValue(BINDING_STACK_POINTER
,thread
) -
1404 (lispobj
*)thread
->binding_stack_start
,
1406 pscav( (lispobj
*) (thread
+1),
1407 fixnum_value(SymbolValue(FREE_TLS_INDEX
,0)) -
1408 (sizeof (struct thread
))/(sizeof (lispobj
)),
1415 /* The original CMU CL code had scavenge-read-only-space code
1416 * controlled by the Lisp-level variable
1417 * *SCAVENGE-READ-ONLY-SPACE*. It was disabled by default, and it
1418 * wasn't documented under what circumstances it was useful or
1419 * safe to turn it on, so it's been turned off in SBCL. If you
1420 * want/need this functionality, and can test and document it,
1421 * please submit a patch. */
1423 if (SymbolValue(SCAVENGE_READ_ONLY_SPACE
) != UNBOUND_MARKER_WIDETAG
1424 && SymbolValue(SCAVENGE_READ_ONLY_SPACE
) != NIL
) {
1425 unsigned read_only_space_size
=
1426 (lispobj
*)SymbolValue(READ_ONLY_SPACE_FREE_POINTER
) -
1427 (lispobj
*)READ_ONLY_SPACE_START
;
1429 "scavenging read only space: %d bytes\n",
1430 read_only_space_size
* sizeof(lispobj
));
1431 pscav( (lispobj
*)READ_ONLY_SPACE_START
, read_only_space_size
, 0);
1439 clean
= (lispobj
*)STATIC_SPACE_START
;
1441 while (clean
!= static_free
)
1442 clean
= pscav(clean
, static_free
- clean
, 0);
1443 laters
= later_blocks
;
1444 count
= later_count
;
1445 later_blocks
= NULL
;
1447 while (laters
!= NULL
) {
1448 for (i
= 0; i
< count
; i
++) {
1449 if (laters
->u
[i
].count
== 0) {
1451 } else if (laters
->u
[i
].count
<= LATERMAXCOUNT
) {
1452 pscav(laters
->u
[i
+1].ptr
, laters
->u
[i
].count
, 1);
1455 pscav(laters
->u
[i
].ptr
, 1, 1);
1458 next
= laters
->next
;
1461 count
= LATERBLOCKSIZE
;
1463 } while (clean
!= static_free
|| later_blocks
!= NULL
);
1470 os_zero((os_vm_address_t
) current_dynamic_space
,
1471 (os_vm_size_t
) DYNAMIC_SPACE_SIZE
);
1473 /* Zero the stack. Note that the stack is also zeroed by SUB-GC
1474 * calling SCRUB-CONTROL-STACK - this zeros the stack on the x86. */
1476 os_zero((os_vm_address_t
) current_control_stack_pointer
,
1477 (os_vm_size_t
) (CONTROL_STACK_SIZE
-
1478 ((current_control_stack_pointer
-
1479 (lispobj
*)CONTROL_STACK_START
) *
1483 /* It helps to update the heap free pointers so that free_heap can
1484 * verify after it's done. */
1485 SetSymbolValue(READ_ONLY_SPACE_FREE_POINTER
, (lispobj
)read_only_free
,0);
1486 SetSymbolValue(STATIC_SPACE_FREE_POINTER
, (lispobj
)static_free
,0);
1488 #if !defined(__i386__)
1489 dynamic_space_free_pointer
= current_dynamic_space
;
1491 #if defined LISP_FEATURE_GENCGC
1494 #error unsupported case /* in CMU CL, was "ibmrt using GC" */