source: trunk/gcc/boehm-gc/dbg_mlc.c@ 3573

Last change on this file since 3573 was 2, checked in by bird, 23 years ago

Initial revision
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  • Property svn:executable set to *
File size: 28.1 KB
Line 
1/*
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.
6 *
7 * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
8 * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
9 *
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.
15 */
16
17#include "private/dbg_mlc.h"
18
19void GC_default_print_heap_obj_proc();
20GC_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));
23
24
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 */
28/* of the heap. */
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 */
34/* its part. */
35GC_bool GC_has_other_debug_info(p)
36ptr_t p;
37{
38 register oh * ohdr = (oh *)p;
39 register ptr_t body = (ptr_t)(ohdr + 1);
40 register word sz = GC_size((ptr_t) ohdr);
41
42 if (HBLKPTR((ptr_t)ohdr) != HBLKPTR((ptr_t)body)
43 || sz < DEBUG_BYTES + EXTRA_BYTES) {
44 return(FALSE);
45 }
46 if (ohdr -> oh_sz == sz) {
47 /* Object may have had debug info, but has been deallocated */
48 return(FALSE);
49 }
50 if (ohdr -> oh_sf == (START_FLAG ^ (word)body)) return(TRUE);
51 if (((word *)ohdr)[BYTES_TO_WORDS(sz)-1] == (END_FLAG ^ (word)body)) {
52 return(TRUE);
53 }
54 return(FALSE);
55}
56#endif
57
58#ifdef KEEP_BACK_PTRS
59
60# include <stdlib.h>
61
62# if defined(LINUX) || defined(SUNOS4) || defined(SUNOS5) \
63 || defined(HPUX) || defined(IRIX) || defined(OSF1)
64# define RANDOM() random()
65# else
66# define RANDOM() (long)rand()
67# endif
68
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)
76 {
77 if (GC_HAS_DEBUG_INFO(dest)) {
78 ((oh *)dest) -> oh_back_ptr = HIDE_BACK_PTR(source);
79 }
80 }
81
82 void GC_marked_for_finalization(ptr_t dest) {
83 GC_store_back_pointer(MARKED_FOR_FINALIZATION, dest);
84 }
85
86 /* Store information about the object referencing dest in *base_p */
87 /* and *offset_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)
93 {
94 oh * hdr = (oh *)GC_base(dest);
95 ptr_t bp;
96 ptr_t bp_base;
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;
102# if ALIGNMENT == 1
103 /* Heuristically try to fix off by 1 errors we introduced by */
104 /* insisting on even addresses. */
105 {
106 ptr_t alternate_ptr = bp + 1;
107 ptr_t target = *(ptr_t *)bp;
108 ptr_t alternate_target = *(ptr_t *)alternate_ptr;
109
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)) {
114 bp = alternate_ptr;
115 }
116 }
117# endif
118 bp_base = GC_base(bp);
119 if (0 == bp_base) {
120 *base_p = bp;
121 *offset_p = 0;
122 return GC_REFD_FROM_ROOT;
123 } else {
124 if (GC_HAS_DEBUG_INFO(bp_base)) bp_base += sizeof(oh);
125 *base_p = bp_base;
126 *offset_p = bp - bp_base;
127 return GC_REFD_FROM_HEAP;
128 }
129 }
130
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)
135 {
136 int i;
137 long heap_offset = RANDOM();
138 if (GC_heapsize > RAND_MAX) {
139 heap_offset *= RAND_MAX;
140 heap_offset += RANDOM();
141 }
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;
150 } else {
151 heap_offset -= size;
152 }
153 }
154 ABORT("GC_generate_random_heap_address: size inconsistency");
155 /*NOTREACHED*/
156 return 0;
157 }
158
159 /* Generate a random address inside a valid marked heap object. */
160 void *GC_generate_random_valid_address(void)
161 {
162 ptr_t result;
163 ptr_t base;
164 for (;;) {
165 result = GC_generate_random_heap_address();
166 base = GC_base(result);
167 if (0 == base) continue;
168 if (!GC_is_marked(base)) continue;
169 return result;
170 }
171 }
172
173 /* Print back trace for p */
174 void GC_print_backtrace(void *p)
175 {
176 void *current = p;
177 int i;
178 GC_ref_kind source;
179 size_t offset;
180 void *base;
181
182 GC_print_heap_obj(GC_base(current));
183 GC_err_printf0("\n");
184 for (i = 0; ; ++i) {
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");
188 goto out;
189 }
190 if (GC_NO_SPACE == source) {
191 GC_err_printf0("No debug info in object: Can't find reference\n");
192 goto out;
193 }
194 GC_err_printf1("Reachable via %d levels of pointers from ",
195 (unsigned long)i);
196 switch(source) {
197 case GC_REFD_FROM_ROOT:
198 GC_err_printf1("root at 0x%lx\n", (unsigned long)base);
199 goto out;
200 case GC_REFD_FROM_REG:
201 GC_err_printf0("root in register\n");
202 goto out;
203 case GC_FINALIZER_REFD:
204 GC_err_printf0("list of finalizable objects\n");
205 goto out;
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");
211 break;
212 }
213 current = base;
214 }
215 out:;
216 }
217
218 /* Force a garbage collection and generate a backtrace from a */
219 /* random heap address. */
220 void GC_generate_random_backtrace(void)
221 {
222 void * current;
223 GC_gcollect();
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);
227 }
228
229#endif /* KEEP_BACK_PTRS */
230
231/* Store debugging info into p. Return displaced pointer. */
232/* Assumes we don't hold allocation lock. */
233ptr_t GC_store_debug_info(p, sz, string, integer)
234register ptr_t p; /* base pointer */
235word sz; /* bytes */
236GC_CONST char * string;
237word integer;
238{
239 register word * result = (word *)((oh *)p + 1);
240 DCL_LOCK_STATE;
241
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. */
245 LOCK();
246# ifdef KEEP_BACK_PTRS
247 ((oh *)p) -> oh_back_ptr = HIDE_BACK_PTR(NOT_MARKED);
248# endif
249# ifdef MAKE_BACK_GRAPH
250 ((oh *)p) -> oh_bg_ptr = HIDE_BACK_PTR((ptr_t)0);
251# endif
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;
259# endif
260 UNLOCK();
261 return((ptr_t)result);
262}
263
264#ifdef DBG_HDRS_ALL
265/* Store debugging info into p. Return displaced pointer. */
266/* This version assumes we do hold the allocation lock. */
267ptr_t GC_store_debug_info_inner(p, sz, string, integer)
268register ptr_t p; /* base pointer */
269word sz; /* bytes */
270char * string;
271word integer;
272{
273 register word * result = (word *)((oh *)p + 1);
274
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);
280# endif
281# ifdef MAKE_BACK_GRAPH
282 ((oh *)p) -> oh_bg_ptr = HIDE_BACK_PTR((ptr_t)0);
283# endif
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;
291# endif
292 return((ptr_t)result);
293}
294#endif
295
296#ifndef SHORT_DBG_HDRS
297/* Check the object with debugging info at ohdr */
298/* return NIL if it's OK. Else return clobbered */
299/* address. */
300ptr_t GC_check_annotated_obj(ohdr)
301register oh * ohdr;
302{
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)));
307 }
308 if (ohdr -> oh_sf != (START_FLAG ^ (word)body)) {
309 return((ptr_t)(&(ohdr -> oh_sf)));
310 }
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));
313 }
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)));
317 }
318 return(0);
319}
320#endif /* !SHORT_DBG_HDRS */
321
322void GC_print_obj(p)
323ptr_t p;
324{
325 register oh * ohdr = (oh *)GC_base(p);
326
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));
331# else
332 GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
333 (unsigned long)(ohdr -> oh_sz));
334# endif
335 PRINT_CALL_CHAIN(ohdr);
336}
337
338# if defined(__STDC__) || defined(__cplusplus)
339 void GC_debug_print_heap_obj_proc(ptr_t p)
340# else
341 void GC_debug_print_heap_obj_proc(p)
342 ptr_t p;
343# endif
344{
345 if (GC_HAS_DEBUG_INFO(p)) {
346 GC_print_obj(p);
347 } else {
348 GC_default_print_heap_obj_proc(p);
349 }
350}
351
352#ifndef SHORT_DBG_HDRS
353void GC_print_smashed_obj(p, clobbered_addr)
354ptr_t p, clobbered_addr;
355{
356 register oh * ohdr = (oh *)GC_base(p);
357
358 GC_err_printf2("0x%lx in object at 0x%lx(", (unsigned long)clobbered_addr,
359 (unsigned long)p);
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));
364 } else {
365 if (ohdr -> oh_string[0] == '\0') {
366 GC_err_puts("EMPTY(smashed?)");
367 } else {
368 GC_err_puts(ohdr -> oh_string);
369 }
370 GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
371 (unsigned long)(ohdr -> oh_sz));
372 PRINT_CALL_CHAIN(ohdr);
373 }
374}
375#endif
376
377void GC_check_heap_proc GC_PROTO((void));
378
379void GC_do_nothing() {}
380
381void GC_start_debugging()
382{
383# ifndef SHORT_DBG_HDRS
384 GC_check_heap = GC_check_heap_proc;
385# else
386 GC_check_heap = GC_do_nothing;
387# endif
388 GC_print_heap_obj = GC_debug_print_heap_obj_proc;
389 GC_debugging_started = TRUE;
390 GC_register_displacement((word)sizeof(oh));
391}
392
393# if defined(__STDC__) || defined(__cplusplus)
394 void GC_debug_register_displacement(GC_word offset)
395# else
396 void GC_debug_register_displacement(offset)
397 GC_word offset;
398# endif
399{
400 GC_register_displacement(offset);
401 GC_register_displacement((word)sizeof(oh) + offset);
402}
403
404# ifdef __STDC__
405 GC_PTR GC_debug_malloc(size_t lb, GC_EXTRA_PARAMS)
406# else
407 GC_PTR GC_debug_malloc(lb, s, i)
408 size_t lb;
409 char * s;
410 int i;
411# ifdef GC_ADD_CALLER
412 --> GC_ADD_CALLER not implemented for K&R C
413# endif
414# endif
415{
416 GC_PTR result = GC_malloc(lb + DEBUG_BYTES);
417
418 if (result == 0) {
419 GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
420 (unsigned long) lb);
421 GC_err_puts(s);
422 GC_err_printf1(":%ld)\n", (unsigned long)i);
423 return(0);
424 }
425 if (!GC_debugging_started) {
426 GC_start_debugging();
427 }
428 ADD_CALL_CHAIN(result, ra);
429 return (GC_store_debug_info(result, (word)lb, s, (word)i));
430}
431
432# ifdef DBG_HDRS_ALL
433/*
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
437 * headers.
438 * We assume debugging was started in collector initialization,
439 * and we already hold the GC lock.
440 */
441 GC_PTR GC_debug_generic_malloc_inner(size_t lb, int k)
442 {
443 GC_PTR result = GC_generic_malloc_inner(lb + DEBUG_BYTES, k);
444
445 if (result == 0) {
446 GC_err_printf1("GC internal allocation (%ld bytes) returning NIL\n",
447 (unsigned long) lb);
448 return(0);
449 }
450 ADD_CALL_CHAIN(result, ra);
451 return (GC_store_debug_info_inner(result, (word)lb, "INTERNAL", (word)0));
452 }
453
454 GC_PTR GC_debug_generic_malloc_inner_ignore_off_page(size_t lb, int k)
455 {
456 GC_PTR result = GC_generic_malloc_inner_ignore_off_page(
457 lb + DEBUG_BYTES, k);
458
459 if (result == 0) {
460 GC_err_printf1("GC internal allocation (%ld bytes) returning NIL\n",
461 (unsigned long) lb);
462 return(0);
463 }
464 ADD_CALL_CHAIN(result, ra);
465 return (GC_store_debug_info_inner(result, (word)lb, "INTERNAL", (word)0));
466 }
467# endif
468
469#ifdef STUBBORN_ALLOC
470# ifdef __STDC__
471 GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
472# else
473 GC_PTR GC_debug_malloc_stubborn(lb, s, i)
474 size_t lb;
475 char * s;
476 int i;
477# endif
478{
479 GC_PTR result = GC_malloc_stubborn(lb + DEBUG_BYTES);
480
481 if (result == 0) {
482 GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
483 (unsigned long) lb);
484 GC_err_puts(s);
485 GC_err_printf1(":%ld)\n", (unsigned long)i);
486 return(0);
487 }
488 if (!GC_debugging_started) {
489 GC_start_debugging();
490 }
491 ADD_CALL_CHAIN(result, ra);
492 return (GC_store_debug_info(result, (word)lb, s, (word)i));
493}
494
495void GC_debug_change_stubborn(p)
496GC_PTR p;
497{
498 register GC_PTR q = GC_base(p);
499 register hdr * hhdr;
500
501 if (q == 0) {
502 GC_err_printf1("Bad argument: 0x%lx to GC_debug_change_stubborn\n",
503 (unsigned long) p);
504 ABORT("GC_debug_change_stubborn: bad arg");
505 }
506 hhdr = HDR(q);
507 if (hhdr -> hb_obj_kind != STUBBORN) {
508 GC_err_printf1("GC_debug_change_stubborn arg not stubborn: 0x%lx\n",
509 (unsigned long) p);
510 ABORT("GC_debug_change_stubborn: arg not stubborn");
511 }
512 GC_change_stubborn(q);
513}
514
515void GC_debug_end_stubborn_change(p)
516GC_PTR p;
517{
518 register GC_PTR q = GC_base(p);
519 register hdr * hhdr;
520
521 if (q == 0) {
522 GC_err_printf1("Bad argument: 0x%lx to GC_debug_end_stubborn_change\n",
523 (unsigned long) p);
524 ABORT("GC_debug_end_stubborn_change: bad arg");
525 }
526 hhdr = HDR(q);
527 if (hhdr -> hb_obj_kind != STUBBORN) {
528 GC_err_printf1("debug_end_stubborn_change arg not stubborn: 0x%lx\n",
529 (unsigned long) p);
530 ABORT("GC_debug_end_stubborn_change: arg not stubborn");
531 }
532 GC_end_stubborn_change(q);
533}
534
535#else /* !STUBBORN_ALLOC */
536
537# ifdef __STDC__
538 GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
539# else
540 GC_PTR GC_debug_malloc_stubborn(lb, s, i)
541 size_t lb;
542 char * s;
543 int i;
544# endif
545{
546 return GC_debug_malloc(lb, OPT_RA s, i);
547}
548
549void GC_debug_change_stubborn(p)
550GC_PTR p;
551{
552}
553
554void GC_debug_end_stubborn_change(p)
555GC_PTR p;
556{
557}
558
559#endif /* !STUBBORN_ALLOC */
560
561# ifdef __STDC__
562 GC_PTR GC_debug_malloc_atomic(size_t lb, GC_EXTRA_PARAMS)
563# else
564 GC_PTR GC_debug_malloc_atomic(lb, s, i)
565 size_t lb;
566 char * s;
567 int i;
568# endif
569{
570 GC_PTR result = GC_malloc_atomic(lb + DEBUG_BYTES);
571
572 if (result == 0) {
573 GC_err_printf1("GC_debug_malloc_atomic(%ld) returning NIL (",
574 (unsigned long) lb);
575 GC_err_puts(s);
576 GC_err_printf1(":%ld)\n", (unsigned long)i);
577 return(0);
578 }
579 if (!GC_debugging_started) {
580 GC_start_debugging();
581 }
582 ADD_CALL_CHAIN(result, ra);
583 return (GC_store_debug_info(result, (word)lb, s, (word)i));
584}
585
586# ifdef __STDC__
587 GC_PTR GC_debug_malloc_uncollectable(size_t lb, GC_EXTRA_PARAMS)
588# else
589 GC_PTR GC_debug_malloc_uncollectable(lb, s, i)
590 size_t lb;
591 char * s;
592 int i;
593# endif
594{
595 GC_PTR result = GC_malloc_uncollectable(lb + DEBUG_BYTES);
596
597 if (result == 0) {
598 GC_err_printf1("GC_debug_malloc_uncollectable(%ld) returning NIL (",
599 (unsigned long) lb);
600 GC_err_puts(s);
601 GC_err_printf1(":%ld)\n", (unsigned long)i);
602 return(0);
603 }
604 if (!GC_debugging_started) {
605 GC_start_debugging();
606 }
607 ADD_CALL_CHAIN(result, ra);
608 return (GC_store_debug_info(result, (word)lb, s, (word)i));
609}
610
611#ifdef ATOMIC_UNCOLLECTABLE
612# ifdef __STDC__
613 GC_PTR GC_debug_malloc_atomic_uncollectable(size_t lb, GC_EXTRA_PARAMS)
614# else
615 GC_PTR GC_debug_malloc_atomic_uncollectable(lb, s, i)
616 size_t lb;
617 char * s;
618 int i;
619# endif
620{
621 GC_PTR result = GC_malloc_atomic_uncollectable(lb + DEBUG_BYTES);
622
623 if (result == 0) {
624 GC_err_printf1(
625 "GC_debug_malloc_atomic_uncollectable(%ld) returning NIL (",
626 (unsigned long) lb);
627 GC_err_puts(s);
628 GC_err_printf1(":%ld)\n", (unsigned long)i);
629 return(0);
630 }
631 if (!GC_debugging_started) {
632 GC_start_debugging();
633 }
634 ADD_CALL_CHAIN(result, ra);
635 return (GC_store_debug_info(result, (word)lb, s, (word)i));
636}
637#endif /* ATOMIC_UNCOLLECTABLE */
638
639# ifdef __STDC__
640 void GC_debug_free(GC_PTR p)
641# else
642 void GC_debug_free(p)
643 GC_PTR p;
644# endif
645{
646 register GC_PTR base;
647 register ptr_t clobbered;
648
649 if (0 == p) return;
650 base = GC_base(p);
651 if (base == 0) {
652 GC_err_printf1("Attempt to free invalid pointer %lx\n",
653 (unsigned long)p);
654 ABORT("free(invalid pointer)");
655 }
656 if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
657 GC_err_printf1(
658 "GC_debug_free called on pointer %lx wo debugging info\n",
659 (unsigned long)p);
660 } else {
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)) {
665 GC_err_printf0(
666 "GC_debug_free: found previously deallocated (?) object at ");
667 } else {
668 GC_err_printf0("GC_debug_free: found smashed location at ");
669 }
670 GC_print_smashed_obj(p, clobbered);
671 }
672 /* Invalidate size */
673 ((oh *)base) -> oh_sz = GC_size(base);
674# endif /* SHORT_DBG_HDRS */
675 }
676 if (GC_find_leak) {
677 GC_free(base);
678 } else {
679 register hdr * hhdr = HDR(p);
680 GC_bool uncollectable = FALSE;
681
682 if (hhdr -> hb_obj_kind == UNCOLLECTABLE) {
683 uncollectable = TRUE;
684 }
685# ifdef ATOMIC_UNCOLLECTABLE
686 if (hhdr -> hb_obj_kind == AUNCOLLECTABLE) {
687 uncollectable = TRUE;
688 }
689# endif
690 if (uncollectable) GC_free(base);
691 } /* !GC_find_leak */
692}
693
694#ifdef THREADS
695
696extern void GC_free_inner(GC_PTR p);
697
698/* Used internally; we assume it's called correctly. */
699void GC_debug_free_inner(GC_PTR p)
700{
701 GC_free_inner(GC_base(p));
702}
703#endif
704
705# ifdef __STDC__
706 GC_PTR GC_debug_realloc(GC_PTR p, size_t lb, GC_EXTRA_PARAMS)
707# else
708 GC_PTR GC_debug_realloc(p, lb, s, i)
709 GC_PTR p;
710 size_t lb;
711 char *s;
712 int i;
713# endif
714{
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;
720 register hdr * hhdr;
721
722 if (p == 0) return(GC_debug_malloc(lb, OPT_RA s, i));
723 if (base == 0) {
724 GC_err_printf1(
725 "Attempt to reallocate invalid pointer %lx\n", (unsigned long)p);
726 ABORT("realloc(invalid pointer)");
727 }
728 if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
729 GC_err_printf1(
730 "GC_debug_realloc called on pointer %lx wo debugging info\n",
731 (unsigned long)p);
732 return(GC_realloc(p, lb));
733 }
734 hhdr = HDR(base);
735 switch (hhdr -> hb_obj_kind) {
736# ifdef STUBBORN_ALLOC
737 case STUBBORN:
738 result = GC_debug_malloc_stubborn(lb, OPT_RA s, i);
739 break;
740# endif
741 case NORMAL:
742 result = GC_debug_malloc(lb, OPT_RA s, i);
743 break;
744 case PTRFREE:
745 result = GC_debug_malloc_atomic(lb, OPT_RA s, i);
746 break;
747 case UNCOLLECTABLE:
748 result = GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
749 break;
750# ifdef ATOMIC_UNCOLLECTABLE
751 case AUNCOLLECTABLE:
752 result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
753 break;
754# endif
755 default:
756 GC_err_printf0("GC_debug_realloc: encountered bad kind\n");
757 ABORT("bad kind");
758 }
759# ifdef SHORT_DBG_HDRS
760 old_sz = GC_size(base) - sizeof(oh);
761# else
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);
766 }
767 old_sz = ((oh *)base) -> oh_sz;
768# endif
769 if (old_sz < copy_sz) copy_sz = old_sz;
770 if (result == 0) return(0);
771 BCOPY(p, result, copy_sz);
772 GC_debug_free(p);
773 return(result);
774}
775
776#ifndef SHORT_DBG_HDRS
777/* Check all marked objects in the given block for validity */
778/*ARGSUSED*/
779# if defined(__STDC__) || defined(__cplusplus)
780 void GC_check_heap_block(register struct hblk *hbp, word dummy)
781# else
782 void GC_check_heap_block(hbp, dummy)
783 register struct hblk *hbp; /* ptr to current heap block */
784 word dummy;
785# endif
786{
787 register struct hblkhdr * hhdr = HDR(hbp);
788 register word sz = hhdr -> hb_sz;
789 register int word_no;
790 register word *p, *plim;
791
792 p = (word *)(hbp->hb_body);
793 word_no = 0;
794 if (sz > MAXOBJSZ) {
795 plim = p;
796 } else {
797 plim = (word *)((((word)hbp) + HBLKSIZE) - WORDS_TO_BYTES(sz));
798 }
799 /* go through all words in block */
800 while( p <= plim ) {
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);
804
805 if (clobbered != 0) {
806 GC_err_printf0(
807 "GC_check_heap_block: found smashed location at ");
808 GC_print_smashed_obj((ptr_t)p, clobbered);
809 }
810 }
811 word_no += sz;
812 p += sz;
813 }
814}
815
816
817/* This assumes that all accessible objects are marked, and that */
818/* I hold the allocation lock. Normally called by collector. */
819void GC_check_heap_proc()
820{
821# ifndef SMALL_CONFIG
822 if (sizeof(oh) & (2 * sizeof(word) - 1) != 0) {
823 ABORT("Alignment problem: object header has inappropriate size\n");
824 }
825# endif
826 GC_apply_to_all_blocks(GC_check_heap_block, (word)0);
827}
828
829#endif /* !SHORT_DBG_HDRS */
830
831struct closure {
832 GC_finalization_proc cl_fn;
833 GC_PTR cl_data;
834};
835
836# ifdef __STDC__
837 void * GC_make_closure(GC_finalization_proc fn, void * data)
838# else
839 GC_PTR GC_make_closure(fn, data)
840 GC_finalization_proc fn;
841 GC_PTR data;
842# endif
843{
844 struct closure * result =
845# ifdef DBG_HDRS_ALL
846 (struct closure *) GC_debug_malloc(sizeof (struct closure),
847 GC_EXTRAS);
848# else
849 (struct closure *) GC_malloc(sizeof (struct closure));
850# endif
851
852 result -> cl_fn = fn;
853 result -> cl_data = data;
854 return((GC_PTR)result);
855}
856
857# ifdef __STDC__
858 void GC_debug_invoke_finalizer(void * obj, void * data)
859# else
860 void GC_debug_invoke_finalizer(obj, data)
861 char * obj;
862 char * data;
863# endif
864{
865 register struct closure * cl = (struct closure *) data;
866
867 (*(cl -> cl_fn))((GC_PTR)((char *)obj + sizeof(oh)), cl -> cl_data);
868}
869
870/* Set ofn and ocd to reflect the values we got back. */
871static void store_old (obj, my_old_fn, my_old_cd, ofn, ocd)
872GC_PTR obj;
873GC_finalization_proc my_old_fn;
874struct closure * my_old_cd;
875GC_finalization_proc *ofn;
876GC_PTR *ocd;
877{
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",
881 obj);
882 /* This should probably be fatal. */
883 } else {
884 if (ofn) *ofn = my_old_cd -> cl_fn;
885 if (ocd) *ocd = my_old_cd -> cl_data;
886 }
887 } else {
888 if (ofn) *ofn = 0;
889 if (ocd) *ocd = 0;
890 }
891}
892
893# ifdef __STDC__
894 void GC_debug_register_finalizer(GC_PTR obj, GC_finalization_proc fn,
895 GC_PTR cd, GC_finalization_proc *ofn,
896 GC_PTR *ocd)
897# else
898 void GC_debug_register_finalizer(obj, fn, cd, ofn, ocd)
899 GC_PTR obj;
900 GC_finalization_proc fn;
901 GC_PTR cd;
902 GC_finalization_proc *ofn;
903 GC_PTR *ocd;
904# endif
905{
906 GC_finalization_proc my_old_fn;
907 GC_PTR my_old_cd;
908 ptr_t base = GC_base(obj);
909 if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
910 GC_err_printf1(
911 "GC_register_finalizer called with non-base-pointer 0x%lx\n",
912 obj);
913 }
914 if (0 == fn) {
915 GC_register_finalizer(base, 0, 0, &my_old_fn, &my_old_cd);
916 } else {
917 GC_register_finalizer(base, GC_debug_invoke_finalizer,
918 GC_make_closure(fn,cd), &my_old_fn, &my_old_cd);
919 }
920 store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
921}
922
923# ifdef __STDC__
924 void GC_debug_register_finalizer_no_order
925 (GC_PTR obj, GC_finalization_proc fn,
926 GC_PTR cd, GC_finalization_proc *ofn,
927 GC_PTR *ocd)
928# else
929 void GC_debug_register_finalizer_no_order
930 (obj, fn, cd, ofn, ocd)
931 GC_PTR obj;
932 GC_finalization_proc fn;
933 GC_PTR cd;
934 GC_finalization_proc *ofn;
935 GC_PTR *ocd;
936# endif
937{
938 GC_finalization_proc my_old_fn;
939 GC_PTR my_old_cd;
940 ptr_t base = GC_base(obj);
941 if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
942 GC_err_printf1(
943 "GC_register_finalizer_no_order called with non-base-pointer 0x%lx\n",
944 obj);
945 }
946 if (0 == fn) {
947 GC_register_finalizer_no_order(base, 0, 0, &my_old_fn, &my_old_cd);
948 } else {
949 GC_register_finalizer_no_order(base, GC_debug_invoke_finalizer,
950 GC_make_closure(fn,cd), &my_old_fn,
951 &my_old_cd);
952 }
953 store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
954 }
955
956# ifdef __STDC__
957 void GC_debug_register_finalizer_ignore_self
958 (GC_PTR obj, GC_finalization_proc fn,
959 GC_PTR cd, GC_finalization_proc *ofn,
960 GC_PTR *ocd)
961# else
962 void GC_debug_register_finalizer_ignore_self
963 (obj, fn, cd, ofn, ocd)
964 GC_PTR obj;
965 GC_finalization_proc fn;
966 GC_PTR cd;
967 GC_finalization_proc *ofn;
968 GC_PTR *ocd;
969# endif
970{
971 GC_finalization_proc my_old_fn;
972 GC_PTR my_old_cd;
973 ptr_t base = GC_base(obj);
974 if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
975 GC_err_printf1(
976 "GC_register_finalizer_ignore_self called with non-base-pointer 0x%lx\n",
977 obj);
978 }
979 if (0 == fn) {
980 GC_register_finalizer_ignore_self(base, 0, 0, &my_old_fn, &my_old_cd);
981 } else {
982 GC_register_finalizer_ignore_self(base, GC_debug_invoke_finalizer,
983 GC_make_closure(fn,cd), &my_old_fn,
984 &my_old_cd);
985 }
986 store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
987}
988
989#ifdef GC_ADD_CALLER
990# define RA GC_RETURN_ADDR,
991#else
992# define RA
993#endif
994
995GC_PTR GC_debug_malloc_replacement(lb)
996size_t lb;
997{
998 return GC_debug_malloc(lb, RA "unknown", 0);
999}
1000
1001GC_PTR GC_debug_realloc_replacement(p, lb)
1002GC_PTR p;
1003size_t lb;
1004{
1005 return GC_debug_realloc(p, lb, RA "unknown", 0);
1006}
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