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 the 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 < DEBUG_BYTES + EXTRA_BYTES) {
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 */
236 GC_CONST char * string;
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 # ifdef MAKE_BACK_GRAPH
250 ((oh *)p) -> oh_bg_ptr = HIDE_BACK_PTR((ptr_t)0);
252 ((oh *)p) -> oh_string = string;
253 ((oh *)p) -> oh_int = integer;
254 # ifndef SHORT_DBG_HDRS
255 ((oh *)p) -> oh_sz = sz;
256 ((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
257 ((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
258 result[SIMPLE_ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
261 return((ptr_t)result);
265 /* Store debugging info into p. Return displaced pointer. */
266 /* This version assumes we do hold the allocation lock. */
267 ptr_t GC_store_debug_info_inner(p, sz, string, integer)
268 register ptr_t p; /* base pointer */
273 register word * result = (word *)((oh *)p + 1);
275 /* There is some argument that we should disable signals here. */
276 /* But that's expensive. And this way things should only appear */
277 /* inconsistent while we're in the handler. */
278 # ifdef KEEP_BACK_PTRS
279 ((oh *)p) -> oh_back_ptr = HIDE_BACK_PTR(NOT_MARKED);
281 # ifdef MAKE_BACK_GRAPH
282 ((oh *)p) -> oh_bg_ptr = HIDE_BACK_PTR((ptr_t)0);
284 ((oh *)p) -> oh_string = string;
285 ((oh *)p) -> oh_int = integer;
286 # ifndef SHORT_DBG_HDRS
287 ((oh *)p) -> oh_sz = sz;
288 ((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
289 ((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
290 result[SIMPLE_ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
292 return((ptr_t)result);
296 #ifndef SHORT_DBG_HDRS
297 /* Check the object with debugging info at ohdr */
298 /* return NIL if it's OK. Else return clobbered */
300 ptr_t GC_check_annotated_obj(ohdr)
303 register ptr_t body = (ptr_t)(ohdr + 1);
304 register word gc_sz = GC_size((ptr_t)ohdr);
305 if (ohdr -> oh_sz + DEBUG_BYTES > gc_sz) {
306 return((ptr_t)(&(ohdr -> oh_sz)));
308 if (ohdr -> oh_sf != (START_FLAG ^ (word)body)) {
309 return((ptr_t)(&(ohdr -> oh_sf)));
311 if (((word *)ohdr)[BYTES_TO_WORDS(gc_sz)-1] != (END_FLAG ^ (word)body)) {
312 return((ptr_t)((word *)ohdr + BYTES_TO_WORDS(gc_sz)-1));
314 if (((word *)body)[SIMPLE_ROUNDED_UP_WORDS(ohdr -> oh_sz)]
315 != (END_FLAG ^ (word)body)) {
316 return((ptr_t)((word *)body + SIMPLE_ROUNDED_UP_WORDS(ohdr -> oh_sz)));
320 #endif /* !SHORT_DBG_HDRS */
325 register oh * ohdr = (oh *)GC_base(p);
327 GC_err_printf1("0x%lx (", ((unsigned long)ohdr + sizeof(oh)));
328 GC_err_puts(ohdr -> oh_string);
329 # ifdef SHORT_DBG_HDRS
330 GC_err_printf1(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int));
332 GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
333 (unsigned long)(ohdr -> oh_sz));
335 PRINT_CALL_CHAIN(ohdr);
338 # if defined(__STDC__) || defined(__cplusplus)
339 void GC_debug_print_heap_obj_proc(ptr_t p)
341 void GC_debug_print_heap_obj_proc(p)
345 if (GC_HAS_DEBUG_INFO(p)) {
348 GC_default_print_heap_obj_proc(p);
352 #ifndef SHORT_DBG_HDRS
353 void GC_print_smashed_obj(p, clobbered_addr)
354 ptr_t p, clobbered_addr;
356 register oh * ohdr = (oh *)GC_base(p);
358 GC_err_printf2("0x%lx in object at 0x%lx(", (unsigned long)clobbered_addr,
360 if (clobbered_addr <= (ptr_t)(&(ohdr -> oh_sz))
361 || ohdr -> oh_string == 0) {
362 GC_err_printf1("<smashed>, appr. sz = %ld)\n",
363 (GC_size((ptr_t)ohdr) - DEBUG_BYTES));
365 if (ohdr -> oh_string[0] == '\0') {
366 GC_err_puts("EMPTY(smashed?)");
368 GC_err_puts(ohdr -> oh_string);
370 GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
371 (unsigned long)(ohdr -> oh_sz));
372 PRINT_CALL_CHAIN(ohdr);
377 void GC_check_heap_proc GC_PROTO((void));
379 void GC_do_nothing() {}
381 void GC_start_debugging()
383 # ifndef SHORT_DBG_HDRS
384 GC_check_heap = GC_check_heap_proc;
386 GC_check_heap = GC_do_nothing;
388 GC_print_heap_obj = GC_debug_print_heap_obj_proc;
389 GC_debugging_started = TRUE;
390 GC_register_displacement((word)sizeof(oh));
393 # if defined(__STDC__) || defined(__cplusplus)
394 void GC_debug_register_displacement(GC_word offset)
396 void GC_debug_register_displacement(offset)
400 GC_register_displacement(offset);
401 GC_register_displacement((word)sizeof(oh) + offset);
405 GC_PTR GC_debug_malloc(size_t lb, GC_EXTRA_PARAMS)
407 GC_PTR GC_debug_malloc(lb, s, i)
411 # ifdef GC_ADD_CALLER
412 --> GC_ADD_CALLER not implemented for K&R C
416 GC_PTR result = GC_malloc(lb + DEBUG_BYTES);
419 GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
422 GC_err_printf1(":%ld)\n", (unsigned long)i);
425 if (!GC_debugging_started) {
426 GC_start_debugging();
428 ADD_CALL_CHAIN(result, ra);
429 return (GC_store_debug_info(result, (word)lb, s, (word)i));
434 * An allocation function for internal use.
435 * Normally internally allocated objects do not have debug information.
436 * But in this case, we need to make sure that all objects have debug
438 * We assume debugging was started in collector initialization,
439 * and we already hold the GC lock.
441 GC_PTR GC_debug_generic_malloc_inner(size_t lb, int k)
443 GC_PTR result = GC_generic_malloc_inner(lb + DEBUG_BYTES, k);
446 GC_err_printf1("GC internal allocation (%ld bytes) returning NIL\n",
450 ADD_CALL_CHAIN(result, ra);
451 return (GC_store_debug_info_inner(result, (word)lb, "INTERNAL", (word)0));
454 GC_PTR GC_debug_generic_malloc_inner_ignore_off_page(size_t lb, int k)
456 GC_PTR result = GC_generic_malloc_inner_ignore_off_page(
457 lb + DEBUG_BYTES, k);
460 GC_err_printf1("GC internal allocation (%ld bytes) returning NIL\n",
464 ADD_CALL_CHAIN(result, ra);
465 return (GC_store_debug_info_inner(result, (word)lb, "INTERNAL", (word)0));
469 #ifdef STUBBORN_ALLOC
471 GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
473 GC_PTR GC_debug_malloc_stubborn(lb, s, i)
479 GC_PTR result = GC_malloc_stubborn(lb + DEBUG_BYTES);
482 GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
485 GC_err_printf1(":%ld)\n", (unsigned long)i);
488 if (!GC_debugging_started) {
489 GC_start_debugging();
491 ADD_CALL_CHAIN(result, ra);
492 return (GC_store_debug_info(result, (word)lb, s, (word)i));
495 void GC_debug_change_stubborn(p)
498 register GC_PTR q = GC_base(p);
502 GC_err_printf1("Bad argument: 0x%lx to GC_debug_change_stubborn\n",
504 ABORT("GC_debug_change_stubborn: bad arg");
507 if (hhdr -> hb_obj_kind != STUBBORN) {
508 GC_err_printf1("GC_debug_change_stubborn arg not stubborn: 0x%lx\n",
510 ABORT("GC_debug_change_stubborn: arg not stubborn");
512 GC_change_stubborn(q);
515 void GC_debug_end_stubborn_change(p)
518 register GC_PTR q = GC_base(p);
522 GC_err_printf1("Bad argument: 0x%lx to GC_debug_end_stubborn_change\n",
524 ABORT("GC_debug_end_stubborn_change: bad arg");
527 if (hhdr -> hb_obj_kind != STUBBORN) {
528 GC_err_printf1("debug_end_stubborn_change arg not stubborn: 0x%lx\n",
530 ABORT("GC_debug_end_stubborn_change: arg not stubborn");
532 GC_end_stubborn_change(q);
535 #else /* !STUBBORN_ALLOC */
538 GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
540 GC_PTR GC_debug_malloc_stubborn(lb, s, i)
546 return GC_debug_malloc(lb, OPT_RA s, i);
549 void GC_debug_change_stubborn(p)
554 void GC_debug_end_stubborn_change(p)
559 #endif /* !STUBBORN_ALLOC */
562 GC_PTR GC_debug_malloc_atomic(size_t lb, GC_EXTRA_PARAMS)
564 GC_PTR GC_debug_malloc_atomic(lb, s, i)
570 GC_PTR result = GC_malloc_atomic(lb + DEBUG_BYTES);
573 GC_err_printf1("GC_debug_malloc_atomic(%ld) returning NIL (",
576 GC_err_printf1(":%ld)\n", (unsigned long)i);
579 if (!GC_debugging_started) {
580 GC_start_debugging();
582 ADD_CALL_CHAIN(result, ra);
583 return (GC_store_debug_info(result, (word)lb, s, (word)i));
587 GC_PTR GC_debug_malloc_uncollectable(size_t lb, GC_EXTRA_PARAMS)
589 GC_PTR GC_debug_malloc_uncollectable(lb, s, i)
595 GC_PTR result = GC_malloc_uncollectable(lb + DEBUG_BYTES);
598 GC_err_printf1("GC_debug_malloc_uncollectable(%ld) returning NIL (",
601 GC_err_printf1(":%ld)\n", (unsigned long)i);
604 if (!GC_debugging_started) {
605 GC_start_debugging();
607 ADD_CALL_CHAIN(result, ra);
608 return (GC_store_debug_info(result, (word)lb, s, (word)i));
611 #ifdef ATOMIC_UNCOLLECTABLE
613 GC_PTR GC_debug_malloc_atomic_uncollectable(size_t lb, GC_EXTRA_PARAMS)
615 GC_PTR GC_debug_malloc_atomic_uncollectable(lb, s, i)
621 GC_PTR result = GC_malloc_atomic_uncollectable(lb + DEBUG_BYTES);
625 "GC_debug_malloc_atomic_uncollectable(%ld) returning NIL (",
628 GC_err_printf1(":%ld)\n", (unsigned long)i);
631 if (!GC_debugging_started) {
632 GC_start_debugging();
634 ADD_CALL_CHAIN(result, ra);
635 return (GC_store_debug_info(result, (word)lb, s, (word)i));
637 #endif /* ATOMIC_UNCOLLECTABLE */
640 void GC_debug_free(GC_PTR p)
642 void GC_debug_free(p)
646 register GC_PTR base;
647 register ptr_t clobbered;
652 GC_err_printf1("Attempt to free invalid pointer %lx\n",
654 ABORT("free(invalid pointer)");
656 if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
658 "GC_debug_free called on pointer %lx wo debugging info\n",
661 # ifndef SHORT_DBG_HDRS
662 clobbered = GC_check_annotated_obj((oh *)base);
663 if (clobbered != 0) {
664 if (((oh *)base) -> oh_sz == GC_size(base)) {
666 "GC_debug_free: found previously deallocated (?) object at ");
668 GC_err_printf0("GC_debug_free: found smashed location at ");
670 GC_print_smashed_obj(p, clobbered);
672 /* Invalidate size */
673 ((oh *)base) -> oh_sz = GC_size(base);
674 # endif /* SHORT_DBG_HDRS */
679 register hdr * hhdr = HDR(p);
680 GC_bool uncollectable = FALSE;
682 if (hhdr -> hb_obj_kind == UNCOLLECTABLE) {
683 uncollectable = TRUE;
685 # ifdef ATOMIC_UNCOLLECTABLE
686 if (hhdr -> hb_obj_kind == AUNCOLLECTABLE) {
687 uncollectable = TRUE;
690 if (uncollectable) GC_free(base);
691 } /* !GC_find_leak */
696 extern void GC_free_inner(GC_PTR p);
698 /* Used internally; we assume it's called correctly. */
699 void GC_debug_free_inner(GC_PTR p)
701 GC_free_inner(GC_base(p));
706 GC_PTR GC_debug_realloc(GC_PTR p, size_t lb, GC_EXTRA_PARAMS)
708 GC_PTR GC_debug_realloc(p, lb, s, i)
715 register GC_PTR base = GC_base(p);
716 register ptr_t clobbered;
717 register GC_PTR result;
718 register size_t copy_sz = lb;
719 register size_t old_sz;
722 if (p == 0) return(GC_debug_malloc(lb, OPT_RA s, i));
725 "Attempt to reallocate invalid pointer %lx\n", (unsigned long)p);
726 ABORT("realloc(invalid pointer)");
728 if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
730 "GC_debug_realloc called on pointer %lx wo debugging info\n",
732 return(GC_realloc(p, lb));
735 switch (hhdr -> hb_obj_kind) {
736 # ifdef STUBBORN_ALLOC
738 result = GC_debug_malloc_stubborn(lb, OPT_RA s, i);
742 result = GC_debug_malloc(lb, OPT_RA s, i);
745 result = GC_debug_malloc_atomic(lb, OPT_RA s, i);
748 result = GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
750 # ifdef ATOMIC_UNCOLLECTABLE
752 result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
756 GC_err_printf0("GC_debug_realloc: encountered bad kind\n");
759 # ifdef SHORT_DBG_HDRS
760 old_sz = GC_size(base) - sizeof(oh);
762 clobbered = GC_check_annotated_obj((oh *)base);
763 if (clobbered != 0) {
764 GC_err_printf0("GC_debug_realloc: found smashed location at ");
765 GC_print_smashed_obj(p, clobbered);
767 old_sz = ((oh *)base) -> oh_sz;
769 if (old_sz < copy_sz) copy_sz = old_sz;
770 if (result == 0) return(0);
771 BCOPY(p, result, copy_sz);
776 #ifndef SHORT_DBG_HDRS
777 /* Check all marked objects in the given block for validity */
779 # if defined(__STDC__) || defined(__cplusplus)
780 void GC_check_heap_block(register struct hblk *hbp, word dummy)
782 void GC_check_heap_block(hbp, dummy)
783 register struct hblk *hbp; /* ptr to current heap block */
787 register struct hblkhdr * hhdr = HDR(hbp);
788 register word sz = hhdr -> hb_sz;
789 register int word_no;
790 register word *p, *plim;
792 p = (word *)(hbp->hb_body);
797 plim = (word *)((((word)hbp) + HBLKSIZE) - WORDS_TO_BYTES(sz));
799 /* go through all words in block */
801 if( mark_bit_from_hdr(hhdr, word_no)
802 && GC_HAS_DEBUG_INFO((ptr_t)p)) {
803 ptr_t clobbered = GC_check_annotated_obj((oh *)p);
805 if (clobbered != 0) {
807 "GC_check_heap_block: found smashed location at ");
808 GC_print_smashed_obj((ptr_t)p, clobbered);
817 /* This assumes that all accessible objects are marked, and that */
818 /* I hold the allocation lock. Normally called by collector. */
819 void GC_check_heap_proc()
821 # ifndef SMALL_CONFIG
822 if (sizeof(oh) & (2 * sizeof(word) - 1) != 0) {
823 ABORT("Alignment problem: object header has inappropriate size\n");
826 GC_apply_to_all_blocks(GC_check_heap_block, (word)0);
829 #endif /* !SHORT_DBG_HDRS */
832 GC_finalization_proc cl_fn;
837 void * GC_make_closure(GC_finalization_proc fn, void * data)
839 GC_PTR GC_make_closure(fn, data)
840 GC_finalization_proc fn;
844 struct closure * result =
846 (struct closure *) GC_debug_malloc(sizeof (struct closure),
849 (struct closure *) GC_malloc(sizeof (struct closure));
852 result -> cl_fn = fn;
853 result -> cl_data = data;
854 return((GC_PTR)result);
858 void GC_debug_invoke_finalizer(void * obj, void * data)
860 void GC_debug_invoke_finalizer(obj, data)
865 register struct closure * cl = (struct closure *) data;
867 (*(cl -> cl_fn))((GC_PTR)((char *)obj + sizeof(oh)), cl -> cl_data);
870 /* Set ofn and ocd to reflect the values we got back. */
871 static void store_old (obj, my_old_fn, my_old_cd, ofn, ocd)
873 GC_finalization_proc my_old_fn;
874 struct closure * my_old_cd;
875 GC_finalization_proc *ofn;
878 if (0 != my_old_fn) {
879 if (my_old_fn != GC_debug_invoke_finalizer) {
880 GC_err_printf1("Debuggable object at 0x%lx had non-debug finalizer.\n",
882 /* This should probably be fatal. */
884 if (ofn) *ofn = my_old_cd -> cl_fn;
885 if (ocd) *ocd = my_old_cd -> cl_data;
894 void GC_debug_register_finalizer(GC_PTR obj, GC_finalization_proc fn,
895 GC_PTR cd, GC_finalization_proc *ofn,
898 void GC_debug_register_finalizer(obj, fn, cd, ofn, ocd)
900 GC_finalization_proc fn;
902 GC_finalization_proc *ofn;
906 GC_finalization_proc my_old_fn;
908 ptr_t base = GC_base(obj);
909 if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
911 "GC_register_finalizer called with non-base-pointer 0x%lx\n",
915 GC_register_finalizer(base, 0, 0, &my_old_fn, &my_old_cd);
917 GC_register_finalizer(base, GC_debug_invoke_finalizer,
918 GC_make_closure(fn,cd), &my_old_fn, &my_old_cd);
920 store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
924 void GC_debug_register_finalizer_no_order
925 (GC_PTR obj, GC_finalization_proc fn,
926 GC_PTR cd, GC_finalization_proc *ofn,
929 void GC_debug_register_finalizer_no_order
930 (obj, fn, cd, ofn, ocd)
932 GC_finalization_proc fn;
934 GC_finalization_proc *ofn;
938 GC_finalization_proc my_old_fn;
940 ptr_t base = GC_base(obj);
941 if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
943 "GC_register_finalizer_no_order called with non-base-pointer 0x%lx\n",
947 GC_register_finalizer_no_order(base, 0, 0, &my_old_fn, &my_old_cd);
949 GC_register_finalizer_no_order(base, GC_debug_invoke_finalizer,
950 GC_make_closure(fn,cd), &my_old_fn,
953 store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
957 void GC_debug_register_finalizer_ignore_self
958 (GC_PTR obj, GC_finalization_proc fn,
959 GC_PTR cd, GC_finalization_proc *ofn,
962 void GC_debug_register_finalizer_ignore_self
963 (obj, fn, cd, ofn, ocd)
965 GC_finalization_proc fn;
967 GC_finalization_proc *ofn;
971 GC_finalization_proc my_old_fn;
973 ptr_t base = GC_base(obj);
974 if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
976 "GC_register_finalizer_ignore_self called with non-base-pointer 0x%lx\n",
980 GC_register_finalizer_ignore_self(base, 0, 0, &my_old_fn, &my_old_cd);
982 GC_register_finalizer_ignore_self(base, GC_debug_invoke_finalizer,
983 GC_make_closure(fn,cd), &my_old_fn,
986 store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
990 # define RA GC_RETURN_ADDR,
995 GC_PTR GC_debug_malloc_replacement(lb)
998 return GC_debug_malloc(lb, RA "unknown", 0);
1001 GC_PTR GC_debug_realloc_replacement(p, lb)
1005 return GC_debug_realloc(p, lb, RA "unknown", 0);