Annotation of OpenXM_contrib2/asir2000/gc/dbg_mlc.c, Revision 1.3
1.1 noro 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.
1.3 ! noro 5: * Copyright (c) 1999 by Hewlett-Packard Company. All rights reserved.
1.1 noro 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: */
1.3 ! noro 16:
! 17: #include "dbg_mlc.h"
1.1 noro 18:
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));
23:
24:
25: /* Check whether object with base pointer p has debugging info */
26: /* p is assumed to point to a legitimate object in our part */
27: /* of the heap. */
28: GC_bool GC_has_debug_info(p)
29: ptr_t p;
30: {
31: register oh * ohdr = (oh *)p;
32: register ptr_t body = (ptr_t)(ohdr + 1);
33: register word sz = GC_size((ptr_t) ohdr);
34:
35: if (HBLKPTR((ptr_t)ohdr) != HBLKPTR((ptr_t)body)
36: || sz < sizeof (oh)) {
37: return(FALSE);
38: }
39: if (ohdr -> oh_sz == sz) {
40: /* Object may have had debug info, but has been deallocated */
41: return(FALSE);
42: }
43: if (ohdr -> oh_sf == (START_FLAG ^ (word)body)) return(TRUE);
44: if (((word *)ohdr)[BYTES_TO_WORDS(sz)-1] == (END_FLAG ^ (word)body)) {
45: return(TRUE);
46: }
47: return(FALSE);
48: }
49:
50: #ifdef KEEP_BACK_PTRS
51: /* Store back pointer to source in dest, if that appears to be possible. */
52: /* This is not completely safe, since we may mistakenly conclude that */
53: /* dest has a debugging wrapper. But the error probability is very */
54: /* small, and this shouldn't be used in production code. */
55: /* We assume that dest is the real base pointer. Source will usually */
56: /* be a pointer to the interior of an object. */
57: void GC_store_back_pointer(ptr_t source, ptr_t dest)
58: {
59: if (GC_has_debug_info(dest)) {
60: ((oh *)dest) -> oh_back_ptr = (ptr_t)HIDE_POINTER(source);
61: }
62: }
63:
64: void GC_marked_for_finalization(ptr_t dest) {
65: GC_store_back_pointer(MARKED_FOR_FINALIZATION, dest);
66: }
67:
68: /* Store information about the object referencing dest in *base_p */
69: /* and *offset_p. */
1.3 ! noro 70: /* source is root ==> *base_p = address, *offset_p = 0 */
1.1 noro 71: /* source is heap object ==> *base_p != 0, *offset_p = offset */
72: /* Returns 1 on success, 0 if source couldn't be determined. */
73: /* Dest can be any address within a heap object. */
74: GC_ref_kind GC_get_back_ptr_info(void *dest, void **base_p, size_t *offset_p)
75: {
76: oh * hdr = (oh *)GC_base(dest);
77: ptr_t bp;
78: ptr_t bp_base;
79: if (!GC_has_debug_info((ptr_t) hdr)) return GC_NO_SPACE;
80: bp = hdr -> oh_back_ptr;
81: if (MARKED_FOR_FINALIZATION == bp) return GC_FINALIZER_REFD;
1.3 ! noro 82: if (MARKED_FROM_REGISTER == bp) return GC_REFD_FROM_REG;
1.1 noro 83: if (0 == bp) return GC_UNREFERENCED;
84: bp = REVEAL_POINTER(bp);
85: bp_base = GC_base(bp);
86: if (0 == bp_base) {
87: *base_p = bp;
88: *offset_p = 0;
89: return GC_REFD_FROM_ROOT;
90: } else {
91: if (GC_has_debug_info(bp_base)) bp_base += sizeof(oh);
92: *base_p = bp_base;
93: *offset_p = bp - bp_base;
94: return GC_REFD_FROM_HEAP;
95: }
96: }
97:
98: /* Generate a random heap address. */
99: /* The resulting address is in the heap, but */
100: /* not necessarily inside a valid object. */
101: void *GC_generate_random_heap_address(void)
102: {
103: int i;
104: int heap_offset = random() % GC_heapsize;
105: for (i = 0; i < GC_n_heap_sects; ++ i) {
106: int size = GC_heap_sects[i].hs_bytes;
107: if (heap_offset < size) {
108: return GC_heap_sects[i].hs_start + heap_offset;
109: } else {
110: heap_offset -= size;
111: }
112: }
113: ABORT("GC_generate_random_heap_address: size inconsistency");
114: /*NOTREACHED*/
115: return 0;
116: }
117:
118: /* Generate a random address inside a valid marked heap object. */
119: void *GC_generate_random_valid_address(void)
120: {
121: ptr_t result;
122: ptr_t base;
123: for (;;) {
124: result = GC_generate_random_heap_address();
125: base = GC_base(result);
126: if (0 == base) continue;
127: if (!GC_is_marked(base)) continue;
128: return result;
129: }
130: }
131:
1.3 ! noro 132: /* Print back trace for p */
! 133: void GC_print_backtrace(void *p)
1.1 noro 134: {
1.3 ! noro 135: void *current = p;
1.1 noro 136: int i;
1.3 ! noro 137: GC_ref_kind source;
1.1 noro 138: size_t offset;
1.3 ! noro 139: void *base;
! 140:
1.1 noro 141: GC_print_heap_obj(GC_base(current));
142: GC_err_printf0("\n");
143: for (i = 0; ; ++i) {
144: source = GC_get_back_ptr_info(current, &base, &offset);
145: if (GC_UNREFERENCED == source) {
146: GC_err_printf0("Reference could not be found\n");
147: goto out;
148: }
149: if (GC_NO_SPACE == source) {
150: GC_err_printf0("No debug info in object: Can't find reference\n");
151: goto out;
152: }
153: GC_err_printf1("Reachable via %d levels of pointers from ",
154: (unsigned long)i);
155: switch(source) {
156: case GC_REFD_FROM_ROOT:
157: GC_err_printf1("root at 0x%lx\n", (unsigned long)base);
158: goto out;
1.3 ! noro 159: case GC_REFD_FROM_REG:
! 160: GC_err_printf0("root in register\n");
! 161: goto out;
1.1 noro 162: case GC_FINALIZER_REFD:
163: GC_err_printf0("list of finalizable objects\n");
164: goto out;
165: case GC_REFD_FROM_HEAP:
166: GC_err_printf1("offset %ld in object:\n", (unsigned long)offset);
167: /* Take GC_base(base) to get real base, i.e. header. */
168: GC_print_heap_obj(GC_base(base));
169: GC_err_printf0("\n");
170: break;
171: }
172: current = base;
173: }
174: out:;
175: }
1.3 ! noro 176:
! 177: /* Force a garbage collection and generate a backtrace from a */
! 178: /* random heap address. */
! 179: void GC_generate_random_backtrace(void)
! 180: {
! 181: void * current;
! 182: GC_gcollect();
! 183: current = GC_generate_random_valid_address();
! 184: GC_printf1("Chose address 0x%lx in object\n", (unsigned long)current);
! 185: GC_print_backtrace(current);
! 186: }
1.1 noro 187:
188: #endif /* KEEP_BACK_PTRS */
189:
190: /* Store debugging info into p. Return displaced pointer. */
191: /* Assumes we don't hold allocation lock. */
192: ptr_t GC_store_debug_info(p, sz, string, integer)
193: register ptr_t p; /* base pointer */
194: word sz; /* bytes */
195: char * string;
196: word integer;
197: {
198: register word * result = (word *)((oh *)p + 1);
199: DCL_LOCK_STATE;
200:
201: /* There is some argument that we should dissble signals here. */
202: /* But that's expensive. And this way things should only appear */
203: /* inconsistent while we're in the handler. */
204: LOCK();
205: # ifdef KEEP_BACK_PTRS
206: ((oh *)p) -> oh_back_ptr = 0;
207: # endif
208: ((oh *)p) -> oh_string = string;
209: ((oh *)p) -> oh_int = integer;
210: ((oh *)p) -> oh_sz = sz;
211: ((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
212: ((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
213: result[ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
214: UNLOCK();
215: return((ptr_t)result);
216: }
217:
218: /* Check the object with debugging info at ohdr */
219: /* return NIL if it's OK. Else return clobbered */
220: /* address. */
221: ptr_t GC_check_annotated_obj(ohdr)
222: register oh * ohdr;
223: {
224: register ptr_t body = (ptr_t)(ohdr + 1);
225: register word gc_sz = GC_size((ptr_t)ohdr);
226: if (ohdr -> oh_sz + DEBUG_BYTES > gc_sz) {
227: return((ptr_t)(&(ohdr -> oh_sz)));
228: }
229: if (ohdr -> oh_sf != (START_FLAG ^ (word)body)) {
230: return((ptr_t)(&(ohdr -> oh_sf)));
231: }
232: if (((word *)ohdr)[BYTES_TO_WORDS(gc_sz)-1] != (END_FLAG ^ (word)body)) {
233: return((ptr_t)((word *)ohdr + BYTES_TO_WORDS(gc_sz)-1));
234: }
235: if (((word *)body)[ROUNDED_UP_WORDS(ohdr -> oh_sz)]
236: != (END_FLAG ^ (word)body)) {
237: return((ptr_t)((word *)body + ROUNDED_UP_WORDS(ohdr -> oh_sz)));
238: }
239: return(0);
240: }
241:
242: void GC_print_obj(p)
243: ptr_t p;
244: {
245: register oh * ohdr = (oh *)GC_base(p);
246:
247: GC_err_printf1("0x%lx (", ((unsigned long)ohdr + sizeof(oh)));
248: GC_err_puts(ohdr -> oh_string);
249: GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
250: (unsigned long)(ohdr -> oh_sz));
251: PRINT_CALL_CHAIN(ohdr);
252: }
253:
254: void GC_debug_print_heap_obj_proc(p)
255: ptr_t p;
256: {
257: if (GC_has_debug_info(p)) {
258: GC_print_obj(p);
259: } else {
260: GC_default_print_heap_obj_proc(p);
261: }
262: }
263:
264: void GC_print_smashed_obj(p, clobbered_addr)
265: ptr_t p, clobbered_addr;
266: {
267: register oh * ohdr = (oh *)GC_base(p);
268:
269: GC_err_printf2("0x%lx in object at 0x%lx(", (unsigned long)clobbered_addr,
270: (unsigned long)p);
271: if (clobbered_addr <= (ptr_t)(&(ohdr -> oh_sz))
272: || ohdr -> oh_string == 0) {
273: GC_err_printf1("<smashed>, appr. sz = %ld)\n",
274: (GC_size((ptr_t)ohdr) - DEBUG_BYTES));
275: } else {
276: if (ohdr -> oh_string[0] == '\0') {
277: GC_err_puts("EMPTY(smashed?)");
278: } else {
279: GC_err_puts(ohdr -> oh_string);
280: }
281: GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
282: (unsigned long)(ohdr -> oh_sz));
283: PRINT_CALL_CHAIN(ohdr);
284: }
285: }
286:
287: void GC_check_heap_proc();
288:
289: void GC_start_debugging()
290: {
291: GC_check_heap = GC_check_heap_proc;
292: GC_print_heap_obj = GC_debug_print_heap_obj_proc;
293: GC_debugging_started = TRUE;
294: GC_register_displacement((word)sizeof(oh));
295: }
296:
297: # if defined(__STDC__) || defined(__cplusplus)
298: void GC_debug_register_displacement(GC_word offset)
299: # else
300: void GC_debug_register_displacement(offset)
301: GC_word offset;
302: # endif
303: {
304: GC_register_displacement(offset);
305: GC_register_displacement((word)sizeof(oh) + offset);
306: }
307:
308: # ifdef __STDC__
1.3 ! noro 309: GC_PTR GC_debug_malloc(size_t lb, GC_EXTRA_PARAMS)
1.1 noro 310: # else
311: GC_PTR GC_debug_malloc(lb, s, i)
312: size_t lb;
313: char * s;
314: int i;
315: # ifdef GC_ADD_CALLER
316: --> GC_ADD_CALLER not implemented for K&R C
317: # endif
318: # endif
319: {
320: GC_PTR result = GC_malloc(lb + DEBUG_BYTES);
321:
322: if (result == 0) {
323: GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
324: (unsigned long) lb);
325: GC_err_puts(s);
326: GC_err_printf1(":%ld)\n", (unsigned long)i);
327: return(0);
328: }
329: if (!GC_debugging_started) {
330: GC_start_debugging();
331: }
332: ADD_CALL_CHAIN(result, ra);
333: return (GC_store_debug_info(result, (word)lb, s, (word)i));
334: }
335:
336: #ifdef STUBBORN_ALLOC
337: # ifdef __STDC__
1.3 ! noro 338: GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
1.1 noro 339: # else
340: GC_PTR GC_debug_malloc_stubborn(lb, s, i)
341: size_t lb;
342: char * s;
343: int i;
344: # endif
345: {
346: GC_PTR result = GC_malloc_stubborn(lb + DEBUG_BYTES);
347:
348: if (result == 0) {
349: GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
350: (unsigned long) lb);
351: GC_err_puts(s);
352: GC_err_printf1(":%ld)\n", (unsigned long)i);
353: return(0);
354: }
355: if (!GC_debugging_started) {
356: GC_start_debugging();
357: }
358: ADD_CALL_CHAIN(result, ra);
359: return (GC_store_debug_info(result, (word)lb, s, (word)i));
360: }
361:
362: void GC_debug_change_stubborn(p)
363: GC_PTR p;
364: {
365: register GC_PTR q = GC_base(p);
366: register hdr * hhdr;
367:
368: if (q == 0) {
369: GC_err_printf1("Bad argument: 0x%lx to GC_debug_change_stubborn\n",
370: (unsigned long) p);
371: ABORT("GC_debug_change_stubborn: bad arg");
372: }
373: hhdr = HDR(q);
374: if (hhdr -> hb_obj_kind != STUBBORN) {
375: GC_err_printf1("GC_debug_change_stubborn arg not stubborn: 0x%lx\n",
376: (unsigned long) p);
377: ABORT("GC_debug_change_stubborn: arg not stubborn");
378: }
379: GC_change_stubborn(q);
380: }
381:
382: void GC_debug_end_stubborn_change(p)
383: GC_PTR p;
384: {
385: register GC_PTR q = GC_base(p);
386: register hdr * hhdr;
387:
388: if (q == 0) {
389: GC_err_printf1("Bad argument: 0x%lx to GC_debug_end_stubborn_change\n",
390: (unsigned long) p);
391: ABORT("GC_debug_end_stubborn_change: bad arg");
392: }
393: hhdr = HDR(q);
394: if (hhdr -> hb_obj_kind != STUBBORN) {
395: GC_err_printf1("debug_end_stubborn_change arg not stubborn: 0x%lx\n",
396: (unsigned long) p);
397: ABORT("GC_debug_end_stubborn_change: arg not stubborn");
398: }
399: GC_end_stubborn_change(q);
400: }
401:
1.3 ! noro 402: #else /* !STUBBORN_ALLOC */
! 403:
! 404: # ifdef __STDC__
! 405: GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
! 406: # else
! 407: GC_PTR GC_debug_malloc_stubborn(lb, s, i)
! 408: size_t lb;
! 409: char * s;
! 410: int i;
! 411: # endif
! 412: {
! 413: return GC_debug_malloc(lb, OPT_RA s, i);
! 414: }
! 415:
! 416: void GC_debug_change_stubborn(p)
! 417: GC_PTR p;
! 418: {
! 419: }
! 420:
! 421: void GC_debug_end_stubborn_change(p)
! 422: GC_PTR p;
! 423: {
! 424: }
! 425:
! 426: #endif /* !STUBBORN_ALLOC */
1.1 noro 427:
428: # ifdef __STDC__
1.3 ! noro 429: GC_PTR GC_debug_malloc_atomic(size_t lb, GC_EXTRA_PARAMS)
1.1 noro 430: # else
431: GC_PTR GC_debug_malloc_atomic(lb, s, i)
432: size_t lb;
433: char * s;
434: int i;
435: # endif
436: {
437: GC_PTR result = GC_malloc_atomic(lb + DEBUG_BYTES);
438:
439: if (result == 0) {
440: GC_err_printf1("GC_debug_malloc_atomic(%ld) returning NIL (",
441: (unsigned long) lb);
442: GC_err_puts(s);
443: GC_err_printf1(":%ld)\n", (unsigned long)i);
444: return(0);
445: }
446: if (!GC_debugging_started) {
447: GC_start_debugging();
448: }
449: ADD_CALL_CHAIN(result, ra);
450: return (GC_store_debug_info(result, (word)lb, s, (word)i));
451: }
452:
453: # ifdef __STDC__
1.3 ! noro 454: GC_PTR GC_debug_malloc_uncollectable(size_t lb, GC_EXTRA_PARAMS)
1.1 noro 455: # else
456: GC_PTR GC_debug_malloc_uncollectable(lb, s, i)
457: size_t lb;
458: char * s;
459: int i;
460: # endif
461: {
462: GC_PTR result = GC_malloc_uncollectable(lb + DEBUG_BYTES);
463:
464: if (result == 0) {
465: GC_err_printf1("GC_debug_malloc_uncollectable(%ld) returning NIL (",
466: (unsigned long) lb);
467: GC_err_puts(s);
468: GC_err_printf1(":%ld)\n", (unsigned long)i);
469: return(0);
470: }
471: if (!GC_debugging_started) {
472: GC_start_debugging();
473: }
474: ADD_CALL_CHAIN(result, ra);
475: return (GC_store_debug_info(result, (word)lb, s, (word)i));
476: }
477:
478: #ifdef ATOMIC_UNCOLLECTABLE
479: # ifdef __STDC__
1.3 ! noro 480: GC_PTR GC_debug_malloc_atomic_uncollectable(size_t lb, GC_EXTRA_PARAMS)
1.1 noro 481: # else
482: GC_PTR GC_debug_malloc_atomic_uncollectable(lb, s, i)
483: size_t lb;
484: char * s;
485: int i;
486: # endif
487: {
488: GC_PTR result = GC_malloc_atomic_uncollectable(lb + DEBUG_BYTES);
489:
490: if (result == 0) {
491: GC_err_printf1(
492: "GC_debug_malloc_atomic_uncollectable(%ld) returning NIL (",
493: (unsigned long) lb);
494: GC_err_puts(s);
495: GC_err_printf1(":%ld)\n", (unsigned long)i);
496: return(0);
497: }
498: if (!GC_debugging_started) {
499: GC_start_debugging();
500: }
501: ADD_CALL_CHAIN(result, ra);
502: return (GC_store_debug_info(result, (word)lb, s, (word)i));
503: }
504: #endif /* ATOMIC_UNCOLLECTABLE */
505:
506: # ifdef __STDC__
507: void GC_debug_free(GC_PTR p)
508: # else
509: void GC_debug_free(p)
510: GC_PTR p;
511: # endif
512: {
1.2 noro 513: register GC_PTR base;
1.1 noro 514: register ptr_t clobbered;
515:
1.2 noro 516: if (0 == p) return;
517: base = GC_base(p);
1.1 noro 518: if (base == 0) {
519: GC_err_printf1("Attempt to free invalid pointer %lx\n",
520: (unsigned long)p);
1.2 noro 521: ABORT("free(invalid pointer)");
1.1 noro 522: }
523: if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
524: GC_err_printf1(
525: "GC_debug_free called on pointer %lx wo debugging info\n",
526: (unsigned long)p);
527: } else {
528: clobbered = GC_check_annotated_obj((oh *)base);
529: if (clobbered != 0) {
530: if (((oh *)base) -> oh_sz == GC_size(base)) {
531: GC_err_printf0(
532: "GC_debug_free: found previously deallocated (?) object at ");
533: } else {
534: GC_err_printf0("GC_debug_free: found smashed location at ");
535: }
536: GC_print_smashed_obj(p, clobbered);
537: }
538: /* Invalidate size */
539: ((oh *)base) -> oh_sz = GC_size(base);
540: }
1.2 noro 541: if (GC_find_leak) {
1.1 noro 542: GC_free(base);
1.2 noro 543: } else {
544: register hdr * hhdr = HDR(p);
545: GC_bool uncollectable = FALSE;
1.1 noro 546:
1.2 noro 547: if (hhdr -> hb_obj_kind == UNCOLLECTABLE) {
548: uncollectable = TRUE;
549: }
550: # ifdef ATOMIC_UNCOLLECTABLE
551: if (hhdr -> hb_obj_kind == AUNCOLLECTABLE) {
552: uncollectable = TRUE;
1.1 noro 553: }
1.2 noro 554: # endif
555: if (uncollectable) GC_free(base);
556: } /* !GC_find_leak */
1.1 noro 557: }
558:
559: # ifdef __STDC__
1.3 ! noro 560: GC_PTR GC_debug_realloc(GC_PTR p, size_t lb, GC_EXTRA_PARAMS)
1.1 noro 561: # else
562: GC_PTR GC_debug_realloc(p, lb, s, i)
563: GC_PTR p;
564: size_t lb;
565: char *s;
566: int i;
567: # endif
568: {
569: register GC_PTR base = GC_base(p);
570: register ptr_t clobbered;
571: register GC_PTR result;
572: register size_t copy_sz = lb;
573: register size_t old_sz;
574: register hdr * hhdr;
575:
576: if (p == 0) return(GC_debug_malloc(lb, OPT_RA s, i));
577: if (base == 0) {
578: GC_err_printf1(
579: "Attempt to reallocate invalid pointer %lx\n", (unsigned long)p);
580: ABORT("realloc(invalid pointer)");
581: }
582: if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
583: GC_err_printf1(
584: "GC_debug_realloc called on pointer %lx wo debugging info\n",
585: (unsigned long)p);
586: return(GC_realloc(p, lb));
587: }
588: hhdr = HDR(base);
589: switch (hhdr -> hb_obj_kind) {
590: # ifdef STUBBORN_ALLOC
591: case STUBBORN:
592: result = GC_debug_malloc_stubborn(lb, OPT_RA s, i);
593: break;
594: # endif
595: case NORMAL:
596: result = GC_debug_malloc(lb, OPT_RA s, i);
597: break;
598: case PTRFREE:
599: result = GC_debug_malloc_atomic(lb, OPT_RA s, i);
600: break;
601: case UNCOLLECTABLE:
602: result = GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
603: break;
604: # ifdef ATOMIC_UNCOLLECTABLE
605: case AUNCOLLECTABLE:
606: result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
607: break;
608: # endif
609: default:
610: GC_err_printf0("GC_debug_realloc: encountered bad kind\n");
611: ABORT("bad kind");
612: }
613: clobbered = GC_check_annotated_obj((oh *)base);
614: if (clobbered != 0) {
615: GC_err_printf0("GC_debug_realloc: found smashed location at ");
616: GC_print_smashed_obj(p, clobbered);
617: }
618: old_sz = ((oh *)base) -> oh_sz;
619: if (old_sz < copy_sz) copy_sz = old_sz;
620: if (result == 0) return(0);
621: BCOPY(p, result, copy_sz);
622: GC_debug_free(p);
623: return(result);
624: }
625:
626: /* Check all marked objects in the given block for validity */
627: /*ARGSUSED*/
628: void GC_check_heap_block(hbp, dummy)
629: register struct hblk *hbp; /* ptr to current heap block */
630: word dummy;
631: {
632: register struct hblkhdr * hhdr = HDR(hbp);
633: register word sz = hhdr -> hb_sz;
634: register int word_no;
635: register word *p, *plim;
636:
637: p = (word *)(hbp->hb_body);
638: word_no = HDR_WORDS;
639: if (sz > MAXOBJSZ) {
640: plim = p;
641: } else {
642: plim = (word *)((((word)hbp) + HBLKSIZE) - WORDS_TO_BYTES(sz));
643: }
644: /* go through all words in block */
645: while( p <= plim ) {
646: if( mark_bit_from_hdr(hhdr, word_no)
647: && GC_has_debug_info((ptr_t)p)) {
648: ptr_t clobbered = GC_check_annotated_obj((oh *)p);
649:
650: if (clobbered != 0) {
651: GC_err_printf0(
652: "GC_check_heap_block: found smashed location at ");
653: GC_print_smashed_obj((ptr_t)p, clobbered);
654: }
655: }
656: word_no += sz;
657: p += sz;
658: }
659: }
660:
661:
662: /* This assumes that all accessible objects are marked, and that */
663: /* I hold the allocation lock. Normally called by collector. */
664: void GC_check_heap_proc()
665: {
666: # ifndef SMALL_CONFIG
667: if (sizeof(oh) & (2 * sizeof(word) - 1) != 0) {
668: ABORT("Alignment problem: object header has inappropriate size\n");
669: }
670: # endif
671: GC_apply_to_all_blocks(GC_check_heap_block, (word)0);
672: }
673:
674: struct closure {
675: GC_finalization_proc cl_fn;
676: GC_PTR cl_data;
677: };
678:
679: # ifdef __STDC__
680: void * GC_make_closure(GC_finalization_proc fn, void * data)
681: # else
682: GC_PTR GC_make_closure(fn, data)
683: GC_finalization_proc fn;
684: GC_PTR data;
685: # endif
686: {
687: struct closure * result =
688: (struct closure *) GC_malloc(sizeof (struct closure));
689:
690: result -> cl_fn = fn;
691: result -> cl_data = data;
692: return((GC_PTR)result);
693: }
694:
695: # ifdef __STDC__
696: void GC_debug_invoke_finalizer(void * obj, void * data)
697: # else
698: void GC_debug_invoke_finalizer(obj, data)
699: char * obj;
700: char * data;
701: # endif
702: {
703: register struct closure * cl = (struct closure *) data;
704:
705: (*(cl -> cl_fn))((GC_PTR)((char *)obj + sizeof(oh)), cl -> cl_data);
706: }
707:
708:
709: # ifdef __STDC__
710: void GC_debug_register_finalizer(GC_PTR obj, GC_finalization_proc fn,
711: GC_PTR cd, GC_finalization_proc *ofn,
712: GC_PTR *ocd)
713: # else
714: void GC_debug_register_finalizer(obj, fn, cd, ofn, ocd)
715: GC_PTR obj;
716: GC_finalization_proc fn;
717: GC_PTR cd;
718: GC_finalization_proc *ofn;
719: GC_PTR *ocd;
720: # endif
721: {
722: ptr_t base = GC_base(obj);
723: if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
724: GC_err_printf1(
725: "GC_register_finalizer called with non-base-pointer 0x%lx\n",
726: obj);
727: }
728: GC_register_finalizer(base, GC_debug_invoke_finalizer,
729: GC_make_closure(fn,cd), ofn, ocd);
730: }
731:
732: # ifdef __STDC__
733: void GC_debug_register_finalizer_no_order
734: (GC_PTR obj, GC_finalization_proc fn,
735: GC_PTR cd, GC_finalization_proc *ofn,
736: GC_PTR *ocd)
737: # else
738: void GC_debug_register_finalizer_no_order
739: (obj, fn, cd, ofn, ocd)
740: GC_PTR obj;
741: GC_finalization_proc fn;
742: GC_PTR cd;
743: GC_finalization_proc *ofn;
744: GC_PTR *ocd;
745: # endif
746: {
747: ptr_t base = GC_base(obj);
748: if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
749: GC_err_printf1(
750: "GC_register_finalizer_no_order called with non-base-pointer 0x%lx\n",
751: obj);
752: }
753: GC_register_finalizer_no_order(base, GC_debug_invoke_finalizer,
754: GC_make_closure(fn,cd), ofn, ocd);
755: }
756:
757: # ifdef __STDC__
758: void GC_debug_register_finalizer_ignore_self
759: (GC_PTR obj, GC_finalization_proc fn,
760: GC_PTR cd, GC_finalization_proc *ofn,
761: GC_PTR *ocd)
762: # else
763: void GC_debug_register_finalizer_ignore_self
764: (obj, fn, cd, ofn, ocd)
765: GC_PTR obj;
766: GC_finalization_proc fn;
767: GC_PTR cd;
768: GC_finalization_proc *ofn;
769: GC_PTR *ocd;
770: # endif
771: {
772: ptr_t base = GC_base(obj);
773: if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
774: GC_err_printf1(
775: "GC_register_finalizer_ignore_self called with non-base-pointer 0x%lx\n",
776: obj);
777: }
778: GC_register_finalizer_ignore_self(base, GC_debug_invoke_finalizer,
779: GC_make_closure(fn,cd), ofn, ocd);
780: }
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