2 * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
3 * Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved.
4 * Copyright (c) 1997 by Silicon Graphics. All rights reserved.
5 * Copyright (c) 1999-2000 by Hewlett-Packard Company. All rights reserved.
7 * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
8 * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
10 * Permission is hereby granted to use or copy this program
11 * for any purpose, provided the above notices are retained on all copies.
12 * Permission to modify the code and to distribute modified code is granted,
13 * provided the above notices are retained, and a notice that the code was
14 * modified is included with the above copyright notice.
17 #include "private/dbg_mlc.h"
19 void GC_default_print_heap_obj_proc();
20 GC_API void GC_register_finalizer_no_order
21 GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
22 GC_finalization_proc *ofn, GC_PTR *ocd));
25 #ifndef SHORT_DBG_HDRS
26 /* Check whether object with base pointer p has debugging info */
27 /* p is assumed to point to a legitimate object in our part */
29 /* This excludes the check as to whether tha back pointer is */
30 /* odd, which is added by the GC_HAS_DEBUG_INFO macro. */
31 /* Note that if DBG_HDRS_ALL is set, uncollectable objects */
32 /* on free lists may not have debug information set. Thus it's */
33 /* not always safe to return TRUE, even if the client does */
35 GC_bool GC_has_other_debug_info(p)
38 register oh * ohdr = (oh *)p;
39 register ptr_t body = (ptr_t)(ohdr + 1);
40 register word sz = GC_size((ptr_t) ohdr);
42 if (HBLKPTR((ptr_t)ohdr) != HBLKPTR((ptr_t)body)
43 || sz < sizeof (oh)) {
46 if (ohdr -> oh_sz == sz) {
47 /* Object may have had debug info, but has been deallocated */
50 if (ohdr -> oh_sf == (START_FLAG ^ (word)body)) return(TRUE);
51 if (((word *)ohdr)[BYTES_TO_WORDS(sz)-1] == (END_FLAG ^ (word)body)) {
62 # if defined(LINUX) || defined(SUNOS4) || defined(SUNOS5) \
63 || defined(HPUX) || defined(IRIX) || defined(OSF1)
64 # define RANDOM() random()
66 # define RANDOM() (long)rand()
69 /* Store back pointer to source in dest, if that appears to be possible. */
70 /* This is not completely safe, since we may mistakenly conclude that */
71 /* dest has a debugging wrapper. But the error probability is very */
72 /* small, and this shouldn't be used in production code. */
73 /* We assume that dest is the real base pointer. Source will usually */
74 /* be a pointer to the interior of an object. */
75 void GC_store_back_pointer(ptr_t source, ptr_t dest)
77 if (GC_HAS_DEBUG_INFO(dest)) {
78 ((oh *)dest) -> oh_back_ptr = HIDE_BACK_PTR(source);
82 void GC_marked_for_finalization(ptr_t dest) {
83 GC_store_back_pointer(MARKED_FOR_FINALIZATION, dest);
86 /* Store information about the object referencing dest in *base_p */
88 /* source is root ==> *base_p = address, *offset_p = 0 */
89 /* source is heap object ==> *base_p != 0, *offset_p = offset */
90 /* Returns 1 on success, 0 if source couldn't be determined. */
91 /* Dest can be any address within a heap object. */
92 GC_ref_kind GC_get_back_ptr_info(void *dest, void **base_p, size_t *offset_p)
94 oh * hdr = (oh *)GC_base(dest);
97 if (!GC_HAS_DEBUG_INFO((ptr_t) hdr)) return GC_NO_SPACE;
98 bp = REVEAL_POINTER(hdr -> oh_back_ptr);
99 if (MARKED_FOR_FINALIZATION == bp) return GC_FINALIZER_REFD;
100 if (MARKED_FROM_REGISTER == bp) return GC_REFD_FROM_REG;
101 if (NOT_MARKED == bp) return GC_UNREFERENCED;
103 /* Heuristically try to fix off by 1 errors we introduced by */
104 /* insisting on even addresses. */
106 ptr_t alternate_ptr = bp + 1;
107 ptr_t target = *(ptr_t *)bp;
108 ptr_t alternate_target = *(ptr_t *)alternate_ptr;
110 if (alternate_target >= GC_least_plausible_heap_addr
111 && alternate_target <= GC_greatest_plausible_heap_addr
112 && (target < GC_least_plausible_heap_addr
113 || target > GC_greatest_plausible_heap_addr)) {
118 bp_base = GC_base(bp);
122 return GC_REFD_FROM_ROOT;
124 if (GC_HAS_DEBUG_INFO(bp_base)) bp_base += sizeof(oh);
126 *offset_p = bp - bp_base;
127 return GC_REFD_FROM_HEAP;
131 /* Generate a random heap address. */
132 /* The resulting address is in the heap, but */
133 /* not necessarily inside a valid object. */
134 void *GC_generate_random_heap_address(void)
137 long heap_offset = RANDOM();
138 if (GC_heapsize > RAND_MAX) {
139 heap_offset *= RAND_MAX;
140 heap_offset += RANDOM();
142 heap_offset %= GC_heapsize;
143 /* This doesn't yield a uniform distribution, especially if */
144 /* e.g. RAND_MAX = 1.5* GC_heapsize. But for typical cases, */
145 /* it's not too bad. */
146 for (i = 0; i < GC_n_heap_sects; ++ i) {
147 int size = GC_heap_sects[i].hs_bytes;
148 if (heap_offset < size) {
149 return GC_heap_sects[i].hs_start + heap_offset;
154 ABORT("GC_generate_random_heap_address: size inconsistency");
159 /* Generate a random address inside a valid marked heap object. */
160 void *GC_generate_random_valid_address(void)
165 result = GC_generate_random_heap_address();
166 base = GC_base(result);
167 if (0 == base) continue;
168 if (!GC_is_marked(base)) continue;
173 /* Print back trace for p */
174 void GC_print_backtrace(void *p)
182 GC_print_heap_obj(GC_base(current));
183 GC_err_printf0("\n");
185 source = GC_get_back_ptr_info(current, &base, &offset);
186 if (GC_UNREFERENCED == source) {
187 GC_err_printf0("Reference could not be found\n");
190 if (GC_NO_SPACE == source) {
191 GC_err_printf0("No debug info in object: Can't find reference\n");
194 GC_err_printf1("Reachable via %d levels of pointers from ",
197 case GC_REFD_FROM_ROOT:
198 GC_err_printf1("root at 0x%lx\n", (unsigned long)base);
200 case GC_REFD_FROM_REG:
201 GC_err_printf0("root in register\n");
203 case GC_FINALIZER_REFD:
204 GC_err_printf0("list of finalizable objects\n");
206 case GC_REFD_FROM_HEAP:
207 GC_err_printf1("offset %ld in object:\n", (unsigned long)offset);
208 /* Take GC_base(base) to get real base, i.e. header. */
209 GC_print_heap_obj(GC_base(base));
210 GC_err_printf0("\n");
218 /* Force a garbage collection and generate a backtrace from a */
219 /* random heap address. */
220 void GC_generate_random_backtrace(void)
224 current = GC_generate_random_valid_address();
225 GC_printf1("Chose address 0x%lx in object\n", (unsigned long)current);
226 GC_print_backtrace(current);
229 #endif /* KEEP_BACK_PTRS */
231 /* Store debugging info into p. Return displaced pointer. */
232 /* Assumes we don't hold allocation lock. */
233 ptr_t GC_store_debug_info(p, sz, string, integer)
234 register ptr_t p; /* base pointer */
239 register word * result = (word *)((oh *)p + 1);
242 /* There is some argument that we should dissble signals here. */
243 /* But that's expensive. And this way things should only appear */
244 /* inconsistent while we're in the handler. */
246 # ifdef KEEP_BACK_PTRS
247 ((oh *)p) -> oh_back_ptr = HIDE_BACK_PTR(NOT_MARKED);
249 ((oh *)p) -> oh_string = string;
250 ((oh *)p) -> oh_int = integer;
251 # ifndef SHORT_DBG_HDRS
252 ((oh *)p) -> oh_sz = sz;
253 ((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
254 ((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
255 result[ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
258 return((ptr_t)result);
262 /* Store debugging info into p. Return displaced pointer. */
263 /* This version assumes we do hold the allocation lock. */
264 ptr_t GC_store_debug_info_inner(p, sz, string, integer)
265 register ptr_t p; /* base pointer */
270 register word * result = (word *)((oh *)p + 1);
272 /* There is some argument that we should disable signals here. */
273 /* But that's expensive. And this way things should only appear */
274 /* inconsistent while we're in the handler. */
275 # ifdef KEEP_BACK_PTRS
276 ((oh *)p) -> oh_back_ptr = 0;
278 ((oh *)p) -> oh_string = string;
279 ((oh *)p) -> oh_int = integer;
280 # ifndef SHORT_DBG_HDRS
281 ((oh *)p) -> oh_sz = sz;
282 ((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
283 ((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
284 result[ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
286 return((ptr_t)result);
290 #ifndef SHORT_DBG_HDRS
291 /* Check the object with debugging info at ohdr */
292 /* return NIL if it's OK. Else return clobbered */
294 ptr_t GC_check_annotated_obj(ohdr)
297 register ptr_t body = (ptr_t)(ohdr + 1);
298 register word gc_sz = GC_size((ptr_t)ohdr);
299 if (ohdr -> oh_sz + DEBUG_BYTES > gc_sz) {
300 return((ptr_t)(&(ohdr -> oh_sz)));
302 if (ohdr -> oh_sf != (START_FLAG ^ (word)body)) {
303 return((ptr_t)(&(ohdr -> oh_sf)));
305 if (((word *)ohdr)[BYTES_TO_WORDS(gc_sz)-1] != (END_FLAG ^ (word)body)) {
306 return((ptr_t)((word *)ohdr + BYTES_TO_WORDS(gc_sz)-1));
308 if (((word *)body)[ROUNDED_UP_WORDS(ohdr -> oh_sz)]
309 != (END_FLAG ^ (word)body)) {
310 return((ptr_t)((word *)body + ROUNDED_UP_WORDS(ohdr -> oh_sz)));
314 #endif /* !SHORT_DBG_HDRS */
319 register oh * ohdr = (oh *)GC_base(p);
321 GC_err_printf1("0x%lx (", ((unsigned long)ohdr + sizeof(oh)));
322 GC_err_puts(ohdr -> oh_string);
323 # ifdef SHORT_DBG_HDRS
324 GC_err_printf1(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int));
326 GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
327 (unsigned long)(ohdr -> oh_sz));
329 PRINT_CALL_CHAIN(ohdr);
332 # if defined(__STDC__) || defined(__cplusplus)
333 void GC_debug_print_heap_obj_proc(ptr_t p)
335 void GC_debug_print_heap_obj_proc(p)
339 if (GC_HAS_DEBUG_INFO(p)) {
342 GC_default_print_heap_obj_proc(p);
346 #ifndef SHORT_DBG_HDRS
347 void GC_print_smashed_obj(p, clobbered_addr)
348 ptr_t p, clobbered_addr;
350 register oh * ohdr = (oh *)GC_base(p);
352 GC_err_printf2("0x%lx in object at 0x%lx(", (unsigned long)clobbered_addr,
354 if (clobbered_addr <= (ptr_t)(&(ohdr -> oh_sz))
355 || ohdr -> oh_string == 0) {
356 GC_err_printf1("<smashed>, appr. sz = %ld)\n",
357 (GC_size((ptr_t)ohdr) - DEBUG_BYTES));
359 if (ohdr -> oh_string[0] == '\0') {
360 GC_err_puts("EMPTY(smashed?)");
362 GC_err_puts(ohdr -> oh_string);
364 GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
365 (unsigned long)(ohdr -> oh_sz));
366 PRINT_CALL_CHAIN(ohdr);
371 void GC_check_heap_proc GC_PROTO((void));
373 void GC_do_nothing() {}
375 void GC_start_debugging()
377 # ifndef SHORT_DBG_HDRS
378 GC_check_heap = GC_check_heap_proc;
380 GC_check_heap = GC_do_nothing;
382 GC_print_heap_obj = GC_debug_print_heap_obj_proc;
383 GC_debugging_started = TRUE;
384 GC_register_displacement((word)sizeof(oh));
387 # if defined(__STDC__) || defined(__cplusplus)
388 void GC_debug_register_displacement(GC_word offset)
390 void GC_debug_register_displacement(offset)
394 GC_register_displacement(offset);
395 GC_register_displacement((word)sizeof(oh) + offset);
399 GC_PTR GC_debug_malloc(size_t lb, GC_EXTRA_PARAMS)
401 GC_PTR GC_debug_malloc(lb, s, i)
405 # ifdef GC_ADD_CALLER
406 --> GC_ADD_CALLER not implemented for K&R C
410 GC_PTR result = GC_malloc(lb + DEBUG_BYTES);
413 GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
416 GC_err_printf1(":%ld)\n", (unsigned long)i);
419 if (!GC_debugging_started) {
420 GC_start_debugging();
422 ADD_CALL_CHAIN(result, ra);
423 return (GC_store_debug_info(result, (word)lb, s, (word)i));
427 GC_PTR GC_debug_generic_malloc(size_t lb, int k, GC_EXTRA_PARAMS)
429 GC_PTR GC_debug_malloc(lb, k, s, i)
434 # ifdef GC_ADD_CALLER
435 --> GC_ADD_CALLER not implemented for K&R C
439 GC_PTR result = GC_generic_malloc(lb + DEBUG_BYTES, k);
442 GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
445 GC_err_printf1(":%ld)\n", (unsigned long)i);
448 if (!GC_debugging_started) {
449 GC_start_debugging();
451 ADD_CALL_CHAIN(result, ra);
452 return (GC_store_debug_info(result, (word)lb, s, (word)i));
457 * An allocation function for internal use.
458 * Normally internally allocated objects do not have debug information.
459 * But in this case, we need to make sure that all objects have debug
461 * We assume debugging was started in collector initialization,
462 * and we already hold the GC lock.
464 GC_PTR GC_debug_generic_malloc_inner(size_t lb, int k)
466 GC_PTR result = GC_generic_malloc_inner(lb + DEBUG_BYTES, k);
469 GC_err_printf1("GC internal allocation (%ld bytes) returning NIL\n",
473 ADD_CALL_CHAIN(result, ra);
474 return (GC_store_debug_info_inner(result, (word)lb, "INTERNAL", (word)0));
477 GC_PTR GC_debug_generic_malloc_inner_ignore_off_page(size_t lb, int k)
479 GC_PTR result = GC_generic_malloc_inner_ignore_off_page(
480 lb + DEBUG_BYTES, k);
483 GC_err_printf1("GC internal allocation (%ld bytes) returning NIL\n",
487 ADD_CALL_CHAIN(result, ra);
488 return (GC_store_debug_info_inner(result, (word)lb, "INTERNAL", (word)0));
492 #ifdef STUBBORN_ALLOC
494 GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
496 GC_PTR GC_debug_malloc_stubborn(lb, s, i)
502 GC_PTR result = GC_malloc_stubborn(lb + DEBUG_BYTES);
505 GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
508 GC_err_printf1(":%ld)\n", (unsigned long)i);
511 if (!GC_debugging_started) {
512 GC_start_debugging();
514 ADD_CALL_CHAIN(result, ra);
515 return (GC_store_debug_info(result, (word)lb, s, (word)i));
518 void GC_debug_change_stubborn(p)
521 register GC_PTR q = GC_base(p);
525 GC_err_printf1("Bad argument: 0x%lx to GC_debug_change_stubborn\n",
527 ABORT("GC_debug_change_stubborn: bad arg");
530 if (hhdr -> hb_obj_kind != STUBBORN) {
531 GC_err_printf1("GC_debug_change_stubborn arg not stubborn: 0x%lx\n",
533 ABORT("GC_debug_change_stubborn: arg not stubborn");
535 GC_change_stubborn(q);
538 void GC_debug_end_stubborn_change(p)
541 register GC_PTR q = GC_base(p);
545 GC_err_printf1("Bad argument: 0x%lx to GC_debug_end_stubborn_change\n",
547 ABORT("GC_debug_end_stubborn_change: bad arg");
550 if (hhdr -> hb_obj_kind != STUBBORN) {
551 GC_err_printf1("debug_end_stubborn_change arg not stubborn: 0x%lx\n",
553 ABORT("GC_debug_end_stubborn_change: arg not stubborn");
555 GC_end_stubborn_change(q);
558 #else /* !STUBBORN_ALLOC */
561 GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
563 GC_PTR GC_debug_malloc_stubborn(lb, s, i)
569 return GC_debug_malloc(lb, OPT_RA s, i);
572 void GC_debug_change_stubborn(p)
577 void GC_debug_end_stubborn_change(p)
582 #endif /* !STUBBORN_ALLOC */
585 GC_PTR GC_debug_malloc_atomic(size_t lb, GC_EXTRA_PARAMS)
587 GC_PTR GC_debug_malloc_atomic(lb, s, i)
593 GC_PTR result = GC_malloc_atomic(lb + DEBUG_BYTES);
596 GC_err_printf1("GC_debug_malloc_atomic(%ld) returning NIL (",
599 GC_err_printf1(":%ld)\n", (unsigned long)i);
602 if (!GC_debugging_started) {
603 GC_start_debugging();
605 ADD_CALL_CHAIN(result, ra);
606 return (GC_store_debug_info(result, (word)lb, s, (word)i));
610 GC_PTR GC_debug_malloc_uncollectable(size_t lb, GC_EXTRA_PARAMS)
612 GC_PTR GC_debug_malloc_uncollectable(lb, s, i)
618 GC_PTR result = GC_malloc_uncollectable(lb + DEBUG_BYTES);
621 GC_err_printf1("GC_debug_malloc_uncollectable(%ld) returning NIL (",
624 GC_err_printf1(":%ld)\n", (unsigned long)i);
627 if (!GC_debugging_started) {
628 GC_start_debugging();
630 ADD_CALL_CHAIN(result, ra);
631 return (GC_store_debug_info(result, (word)lb, s, (word)i));
634 #ifdef ATOMIC_UNCOLLECTABLE
636 GC_PTR GC_debug_malloc_atomic_uncollectable(size_t lb, GC_EXTRA_PARAMS)
638 GC_PTR GC_debug_malloc_atomic_uncollectable(lb, s, i)
644 GC_PTR result = GC_malloc_atomic_uncollectable(lb + DEBUG_BYTES);
648 "GC_debug_malloc_atomic_uncollectable(%ld) returning NIL (",
651 GC_err_printf1(":%ld)\n", (unsigned long)i);
654 if (!GC_debugging_started) {
655 GC_start_debugging();
657 ADD_CALL_CHAIN(result, ra);
658 return (GC_store_debug_info(result, (word)lb, s, (word)i));
660 #endif /* ATOMIC_UNCOLLECTABLE */
663 void GC_debug_free(GC_PTR p)
665 void GC_debug_free(p)
669 register GC_PTR base;
670 register ptr_t clobbered;
675 GC_err_printf1("Attempt to free invalid pointer %lx\n",
677 ABORT("free(invalid pointer)");
679 if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
681 "GC_debug_free called on pointer %lx wo debugging info\n",
684 # ifndef SHORT_DBG_HDRS
685 clobbered = GC_check_annotated_obj((oh *)base);
686 if (clobbered != 0) {
687 if (((oh *)base) -> oh_sz == GC_size(base)) {
689 "GC_debug_free: found previously deallocated (?) object at ");
691 GC_err_printf0("GC_debug_free: found smashed location at ");
693 GC_print_smashed_obj(p, clobbered);
695 /* Invalidate size */
696 ((oh *)base) -> oh_sz = GC_size(base);
697 # endif /* SHORT_DBG_HDRS */
702 register hdr * hhdr = HDR(p);
703 GC_bool uncollectable = FALSE;
705 if (hhdr -> hb_obj_kind == UNCOLLECTABLE) {
706 uncollectable = TRUE;
708 # ifdef ATOMIC_UNCOLLECTABLE
709 if (hhdr -> hb_obj_kind == AUNCOLLECTABLE) {
710 uncollectable = TRUE;
713 if (uncollectable) GC_free(base);
714 } /* !GC_find_leak */
719 extern void GC_free_inner(GC_PTR p);
721 /* Used internally; we assume it's called correctly. */
722 void GC_debug_free_inner(GC_PTR p)
724 GC_free_inner(GC_base(p));
729 GC_PTR GC_debug_realloc(GC_PTR p, size_t lb, GC_EXTRA_PARAMS)
731 GC_PTR GC_debug_realloc(p, lb, s, i)
738 register GC_PTR base = GC_base(p);
739 register ptr_t clobbered;
740 register GC_PTR result;
741 register size_t copy_sz = lb;
742 register size_t old_sz;
745 if (p == 0) return(GC_debug_malloc(lb, OPT_RA s, i));
748 "Attempt to reallocate invalid pointer %lx\n", (unsigned long)p);
749 ABORT("realloc(invalid pointer)");
751 if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
753 "GC_debug_realloc called on pointer %lx wo debugging info\n",
755 return(GC_realloc(p, lb));
758 switch (hhdr -> hb_obj_kind) {
759 # ifdef STUBBORN_ALLOC
761 result = GC_debug_malloc_stubborn(lb, OPT_RA s, i);
765 result = GC_debug_malloc(lb, OPT_RA s, i);
768 result = GC_debug_malloc_atomic(lb, OPT_RA s, i);
771 result = GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
773 # ifdef ATOMIC_UNCOLLECTABLE
775 result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
779 GC_err_printf0("GC_debug_realloc: encountered bad kind\n");
782 # ifdef SHORT_DBG_HDRS
783 old_sz = GC_size(base) - sizeof(oh);
785 clobbered = GC_check_annotated_obj((oh *)base);
786 if (clobbered != 0) {
787 GC_err_printf0("GC_debug_realloc: found smashed location at ");
788 GC_print_smashed_obj(p, clobbered);
790 old_sz = ((oh *)base) -> oh_sz;
792 if (old_sz < copy_sz) copy_sz = old_sz;
793 if (result == 0) return(0);
794 BCOPY(p, result, copy_sz);
799 #ifndef SHORT_DBG_HDRS
800 /* Check all marked objects in the given block for validity */
802 # if defined(__STDC__) || defined(__cplusplus)
803 void GC_check_heap_block(register struct hblk *hbp, word dummy)
805 void GC_check_heap_block(hbp, dummy)
806 register struct hblk *hbp; /* ptr to current heap block */
810 register struct hblkhdr * hhdr = HDR(hbp);
811 register word sz = hhdr -> hb_sz;
812 register int word_no;
813 register word *p, *plim;
815 p = (word *)(hbp->hb_body);
820 plim = (word *)((((word)hbp) + HBLKSIZE) - WORDS_TO_BYTES(sz));
822 /* go through all words in block */
824 if( mark_bit_from_hdr(hhdr, word_no)
825 && GC_HAS_DEBUG_INFO((ptr_t)p)) {
826 ptr_t clobbered = GC_check_annotated_obj((oh *)p);
828 if (clobbered != 0) {
830 "GC_check_heap_block: found smashed location at ");
831 GC_print_smashed_obj((ptr_t)p, clobbered);
840 /* This assumes that all accessible objects are marked, and that */
841 /* I hold the allocation lock. Normally called by collector. */
842 void GC_check_heap_proc()
844 # ifndef SMALL_CONFIG
845 if (sizeof(oh) & (2 * sizeof(word) - 1) != 0) {
846 ABORT("Alignment problem: object header has inappropriate size\n");
849 GC_apply_to_all_blocks(GC_check_heap_block, (word)0);
852 #endif /* !SHORT_DBG_HDRS */
855 GC_finalization_proc cl_fn;
860 void * GC_make_closure(GC_finalization_proc fn, void * data)
862 GC_PTR GC_make_closure(fn, data)
863 GC_finalization_proc fn;
867 struct closure * result =
869 (struct closure *) GC_debug_malloc(sizeof (struct closure),
872 (struct closure *) GC_malloc(sizeof (struct closure));
875 result -> cl_fn = fn;
876 result -> cl_data = data;
877 return((GC_PTR)result);
881 void GC_debug_invoke_finalizer(void * obj, void * data)
883 void GC_debug_invoke_finalizer(obj, data)
888 register struct closure * cl = (struct closure *) data;
890 (*(cl -> cl_fn))((GC_PTR)((char *)obj + sizeof(oh)), cl -> cl_data);
895 void GC_debug_register_finalizer(GC_PTR obj, GC_finalization_proc fn,
896 GC_PTR cd, GC_finalization_proc *ofn,
899 void GC_debug_register_finalizer(obj, fn, cd, ofn, ocd)
901 GC_finalization_proc fn;
903 GC_finalization_proc *ofn;
907 ptr_t base = GC_base(obj);
908 if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
910 "GC_register_finalizer called with non-base-pointer 0x%lx\n",
913 GC_register_finalizer(base, GC_debug_invoke_finalizer,
914 GC_make_closure(fn,cd), ofn, ocd);
918 void GC_debug_register_finalizer_no_order
919 (GC_PTR obj, GC_finalization_proc fn,
920 GC_PTR cd, GC_finalization_proc *ofn,
923 void GC_debug_register_finalizer_no_order
924 (obj, fn, cd, ofn, ocd)
926 GC_finalization_proc fn;
928 GC_finalization_proc *ofn;
932 ptr_t base = GC_base(obj);
933 if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
935 "GC_register_finalizer_no_order called with non-base-pointer 0x%lx\n",
938 GC_register_finalizer_no_order(base, GC_debug_invoke_finalizer,
939 GC_make_closure(fn,cd), ofn, ocd);
943 void GC_debug_register_finalizer_ignore_self
944 (GC_PTR obj, GC_finalization_proc fn,
945 GC_PTR cd, GC_finalization_proc *ofn,
948 void GC_debug_register_finalizer_ignore_self
949 (obj, fn, cd, ofn, ocd)
951 GC_finalization_proc fn;
953 GC_finalization_proc *ofn;
957 ptr_t base = GC_base(obj);
958 if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
960 "GC_register_finalizer_ignore_self called with non-base-pointer 0x%lx\n",
963 GC_register_finalizer_ignore_self(base, GC_debug_invoke_finalizer,
964 GC_make_closure(fn,cd), ofn, ocd);
967 GC_PTR GC_debug_malloc_replacement(lb)
970 return GC_debug_malloc(lb, "unknown", 0);
973 GC_PTR GC_debug_realloc_replacement(p, lb)
977 return GC_debug_realloc(p, lb, "unknown", 0);