Annotation of OpenXM_contrib2/asir2000/gc/dbg_mlc.c, Revision 1.1
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.
! 5: *
! 6: * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
! 7: * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
! 8: *
! 9: * Permission is hereby granted to use or copy this program
! 10: * for any purpose, provided the above notices are retained on all copies.
! 11: * Permission to modify the code and to distribute modified code is granted,
! 12: * provided the above notices are retained, and a notice that the code was
! 13: * modified is included with the above copyright notice.
! 14: */
! 15: # define I_HIDE_POINTERS
! 16: # include "gc_priv.h"
! 17: # ifdef KEEP_BACK_PTRS
! 18: # include "backptr.h"
! 19: # endif
! 20:
! 21: void GC_default_print_heap_obj_proc();
! 22: GC_API void GC_register_finalizer_no_order
! 23: GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
! 24: GC_finalization_proc *ofn, GC_PTR *ocd));
! 25:
! 26: /* Do we want to and know how to save the call stack at the time of */
! 27: /* an allocation? How much space do we want to use in each object? */
! 28:
! 29: # define START_FLAG ((word)0xfedcedcb)
! 30: # define END_FLAG ((word)0xbcdecdef)
! 31: /* Stored both one past the end of user object, and one before */
! 32: /* the end of the object as seen by the allocator. */
! 33:
! 34:
! 35: /* Object header */
! 36: typedef struct {
! 37: # ifdef KEEP_BACK_PTRS
! 38: ptr_t oh_back_ptr;
! 39: # define MARKED_FOR_FINALIZATION (ptr_t)(-1)
! 40: /* Object was marked because it is finalizable. */
! 41: # ifdef ALIGN_DOUBLE
! 42: word oh_dummy;
! 43: # endif
! 44: # endif
! 45: char * oh_string; /* object descriptor string */
! 46: word oh_int; /* object descriptor integers */
! 47: # ifdef NEED_CALLINFO
! 48: struct callinfo oh_ci[NFRAMES];
! 49: # endif
! 50: word oh_sz; /* Original malloc arg. */
! 51: word oh_sf; /* start flag */
! 52: } oh;
! 53: /* The size of the above structure is assumed not to dealign things, */
! 54: /* and to be a multiple of the word length. */
! 55:
! 56: #define DEBUG_BYTES (sizeof (oh) + sizeof (word))
! 57: #undef ROUNDED_UP_WORDS
! 58: #define ROUNDED_UP_WORDS(n) BYTES_TO_WORDS((n) + WORDS_TO_BYTES(1) - 1)
! 59:
! 60:
! 61: #ifdef SAVE_CALL_CHAIN
! 62: # define ADD_CALL_CHAIN(base, ra) GC_save_callers(((oh *)(base)) -> oh_ci)
! 63: # define PRINT_CALL_CHAIN(base) GC_print_callers(((oh *)(base)) -> oh_ci)
! 64: #else
! 65: # ifdef GC_ADD_CALLER
! 66: # define ADD_CALL_CHAIN(base, ra) ((oh *)(base)) -> oh_ci[0].ci_pc = (ra)
! 67: # define PRINT_CALL_CHAIN(base) GC_print_callers(((oh *)(base)) -> oh_ci)
! 68: # else
! 69: # define ADD_CALL_CHAIN(base, ra)
! 70: # define PRINT_CALL_CHAIN(base)
! 71: # endif
! 72: #endif
! 73:
! 74: /* Check whether object with base pointer p has debugging info */
! 75: /* p is assumed to point to a legitimate object in our part */
! 76: /* of the heap. */
! 77: GC_bool GC_has_debug_info(p)
! 78: ptr_t p;
! 79: {
! 80: register oh * ohdr = (oh *)p;
! 81: register ptr_t body = (ptr_t)(ohdr + 1);
! 82: register word sz = GC_size((ptr_t) ohdr);
! 83:
! 84: if (HBLKPTR((ptr_t)ohdr) != HBLKPTR((ptr_t)body)
! 85: || sz < sizeof (oh)) {
! 86: return(FALSE);
! 87: }
! 88: if (ohdr -> oh_sz == sz) {
! 89: /* Object may have had debug info, but has been deallocated */
! 90: return(FALSE);
! 91: }
! 92: if (ohdr -> oh_sf == (START_FLAG ^ (word)body)) return(TRUE);
! 93: if (((word *)ohdr)[BYTES_TO_WORDS(sz)-1] == (END_FLAG ^ (word)body)) {
! 94: return(TRUE);
! 95: }
! 96: return(FALSE);
! 97: }
! 98:
! 99: #ifdef KEEP_BACK_PTRS
! 100: /* Store back pointer to source in dest, if that appears to be possible. */
! 101: /* This is not completely safe, since we may mistakenly conclude that */
! 102: /* dest has a debugging wrapper. But the error probability is very */
! 103: /* small, and this shouldn't be used in production code. */
! 104: /* We assume that dest is the real base pointer. Source will usually */
! 105: /* be a pointer to the interior of an object. */
! 106: void GC_store_back_pointer(ptr_t source, ptr_t dest)
! 107: {
! 108: if (GC_has_debug_info(dest)) {
! 109: ((oh *)dest) -> oh_back_ptr = (ptr_t)HIDE_POINTER(source);
! 110: }
! 111: }
! 112:
! 113: void GC_marked_for_finalization(ptr_t dest) {
! 114: GC_store_back_pointer(MARKED_FOR_FINALIZATION, dest);
! 115: }
! 116:
! 117: /* Store information about the object referencing dest in *base_p */
! 118: /* and *offset_p. */
! 119: /* source is root ==> *base_p = 0, *offset_p = address */
! 120: /* source is heap object ==> *base_p != 0, *offset_p = offset */
! 121: /* Returns 1 on success, 0 if source couldn't be determined. */
! 122: /* Dest can be any address within a heap object. */
! 123: GC_ref_kind GC_get_back_ptr_info(void *dest, void **base_p, size_t *offset_p)
! 124: {
! 125: oh * hdr = (oh *)GC_base(dest);
! 126: ptr_t bp;
! 127: ptr_t bp_base;
! 128: if (!GC_has_debug_info((ptr_t) hdr)) return GC_NO_SPACE;
! 129: bp = hdr -> oh_back_ptr;
! 130: if (MARKED_FOR_FINALIZATION == bp) return GC_FINALIZER_REFD;
! 131: if (0 == bp) return GC_UNREFERENCED;
! 132: bp = REVEAL_POINTER(bp);
! 133: bp_base = GC_base(bp);
! 134: if (0 == bp_base) {
! 135: *base_p = bp;
! 136: *offset_p = 0;
! 137: return GC_REFD_FROM_ROOT;
! 138: } else {
! 139: if (GC_has_debug_info(bp_base)) bp_base += sizeof(oh);
! 140: *base_p = bp_base;
! 141: *offset_p = bp - bp_base;
! 142: return GC_REFD_FROM_HEAP;
! 143: }
! 144: }
! 145:
! 146: /* Generate a random heap address. */
! 147: /* The resulting address is in the heap, but */
! 148: /* not necessarily inside a valid object. */
! 149: void *GC_generate_random_heap_address(void)
! 150: {
! 151: int i;
! 152: int heap_offset = random() % GC_heapsize;
! 153: for (i = 0; i < GC_n_heap_sects; ++ i) {
! 154: int size = GC_heap_sects[i].hs_bytes;
! 155: if (heap_offset < size) {
! 156: return GC_heap_sects[i].hs_start + heap_offset;
! 157: } else {
! 158: heap_offset -= size;
! 159: }
! 160: }
! 161: ABORT("GC_generate_random_heap_address: size inconsistency");
! 162: /*NOTREACHED*/
! 163: return 0;
! 164: }
! 165:
! 166: /* Generate a random address inside a valid marked heap object. */
! 167: void *GC_generate_random_valid_address(void)
! 168: {
! 169: ptr_t result;
! 170: ptr_t base;
! 171: for (;;) {
! 172: result = GC_generate_random_heap_address();
! 173: base = GC_base(result);
! 174: if (0 == base) continue;
! 175: if (!GC_is_marked(base)) continue;
! 176: return result;
! 177: }
! 178: }
! 179:
! 180: /* Force a garbage collection and generate a backtrace from a */
! 181: /* random heap address. */
! 182: void GC_generate_random_backtrace(void)
! 183: {
! 184: void * current;
! 185: int i;
! 186: void * base;
! 187: size_t offset;
! 188: GC_ref_kind source;
! 189: GC_gcollect();
! 190: current = GC_generate_random_valid_address();
! 191: GC_printf1("Chose address 0x%lx in object\n", (unsigned long)current);
! 192: GC_print_heap_obj(GC_base(current));
! 193: GC_err_printf0("\n");
! 194: for (i = 0; ; ++i) {
! 195: source = GC_get_back_ptr_info(current, &base, &offset);
! 196: if (GC_UNREFERENCED == source) {
! 197: GC_err_printf0("Reference could not be found\n");
! 198: goto out;
! 199: }
! 200: if (GC_NO_SPACE == source) {
! 201: GC_err_printf0("No debug info in object: Can't find reference\n");
! 202: goto out;
! 203: }
! 204: GC_err_printf1("Reachable via %d levels of pointers from ",
! 205: (unsigned long)i);
! 206: switch(source) {
! 207: case GC_REFD_FROM_ROOT:
! 208: GC_err_printf1("root at 0x%lx\n", (unsigned long)base);
! 209: goto out;
! 210: case GC_FINALIZER_REFD:
! 211: GC_err_printf0("list of finalizable objects\n");
! 212: goto out;
! 213: case GC_REFD_FROM_HEAP:
! 214: GC_err_printf1("offset %ld in object:\n", (unsigned long)offset);
! 215: /* Take GC_base(base) to get real base, i.e. header. */
! 216: GC_print_heap_obj(GC_base(base));
! 217: GC_err_printf0("\n");
! 218: break;
! 219: }
! 220: current = base;
! 221: }
! 222: out:;
! 223: }
! 224:
! 225: #endif /* KEEP_BACK_PTRS */
! 226:
! 227: /* Store debugging info into p. Return displaced pointer. */
! 228: /* Assumes we don't hold allocation lock. */
! 229: ptr_t GC_store_debug_info(p, sz, string, integer)
! 230: register ptr_t p; /* base pointer */
! 231: word sz; /* bytes */
! 232: char * string;
! 233: word integer;
! 234: {
! 235: register word * result = (word *)((oh *)p + 1);
! 236: DCL_LOCK_STATE;
! 237:
! 238: /* There is some argument that we should dissble signals here. */
! 239: /* But that's expensive. And this way things should only appear */
! 240: /* inconsistent while we're in the handler. */
! 241: LOCK();
! 242: # ifdef KEEP_BACK_PTRS
! 243: ((oh *)p) -> oh_back_ptr = 0;
! 244: # endif
! 245: ((oh *)p) -> oh_string = string;
! 246: ((oh *)p) -> oh_int = integer;
! 247: ((oh *)p) -> oh_sz = sz;
! 248: ((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
! 249: ((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
! 250: result[ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
! 251: UNLOCK();
! 252: return((ptr_t)result);
! 253: }
! 254:
! 255: /* Check the object with debugging info at ohdr */
! 256: /* return NIL if it's OK. Else return clobbered */
! 257: /* address. */
! 258: ptr_t GC_check_annotated_obj(ohdr)
! 259: register oh * ohdr;
! 260: {
! 261: register ptr_t body = (ptr_t)(ohdr + 1);
! 262: register word gc_sz = GC_size((ptr_t)ohdr);
! 263: if (ohdr -> oh_sz + DEBUG_BYTES > gc_sz) {
! 264: return((ptr_t)(&(ohdr -> oh_sz)));
! 265: }
! 266: if (ohdr -> oh_sf != (START_FLAG ^ (word)body)) {
! 267: return((ptr_t)(&(ohdr -> oh_sf)));
! 268: }
! 269: if (((word *)ohdr)[BYTES_TO_WORDS(gc_sz)-1] != (END_FLAG ^ (word)body)) {
! 270: return((ptr_t)((word *)ohdr + BYTES_TO_WORDS(gc_sz)-1));
! 271: }
! 272: if (((word *)body)[ROUNDED_UP_WORDS(ohdr -> oh_sz)]
! 273: != (END_FLAG ^ (word)body)) {
! 274: return((ptr_t)((word *)body + ROUNDED_UP_WORDS(ohdr -> oh_sz)));
! 275: }
! 276: return(0);
! 277: }
! 278:
! 279: void GC_print_obj(p)
! 280: ptr_t p;
! 281: {
! 282: register oh * ohdr = (oh *)GC_base(p);
! 283:
! 284: GC_err_printf1("0x%lx (", ((unsigned long)ohdr + sizeof(oh)));
! 285: GC_err_puts(ohdr -> oh_string);
! 286: GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
! 287: (unsigned long)(ohdr -> oh_sz));
! 288: PRINT_CALL_CHAIN(ohdr);
! 289: }
! 290:
! 291: void GC_debug_print_heap_obj_proc(p)
! 292: ptr_t p;
! 293: {
! 294: if (GC_has_debug_info(p)) {
! 295: GC_print_obj(p);
! 296: } else {
! 297: GC_default_print_heap_obj_proc(p);
! 298: }
! 299: }
! 300:
! 301: void GC_print_smashed_obj(p, clobbered_addr)
! 302: ptr_t p, clobbered_addr;
! 303: {
! 304: register oh * ohdr = (oh *)GC_base(p);
! 305:
! 306: GC_err_printf2("0x%lx in object at 0x%lx(", (unsigned long)clobbered_addr,
! 307: (unsigned long)p);
! 308: if (clobbered_addr <= (ptr_t)(&(ohdr -> oh_sz))
! 309: || ohdr -> oh_string == 0) {
! 310: GC_err_printf1("<smashed>, appr. sz = %ld)\n",
! 311: (GC_size((ptr_t)ohdr) - DEBUG_BYTES));
! 312: } else {
! 313: if (ohdr -> oh_string[0] == '\0') {
! 314: GC_err_puts("EMPTY(smashed?)");
! 315: } else {
! 316: GC_err_puts(ohdr -> oh_string);
! 317: }
! 318: GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
! 319: (unsigned long)(ohdr -> oh_sz));
! 320: PRINT_CALL_CHAIN(ohdr);
! 321: }
! 322: }
! 323:
! 324: void GC_check_heap_proc();
! 325:
! 326: void GC_start_debugging()
! 327: {
! 328: GC_check_heap = GC_check_heap_proc;
! 329: GC_print_heap_obj = GC_debug_print_heap_obj_proc;
! 330: GC_debugging_started = TRUE;
! 331: GC_register_displacement((word)sizeof(oh));
! 332: }
! 333:
! 334: # if defined(__STDC__) || defined(__cplusplus)
! 335: void GC_debug_register_displacement(GC_word offset)
! 336: # else
! 337: void GC_debug_register_displacement(offset)
! 338: GC_word offset;
! 339: # endif
! 340: {
! 341: GC_register_displacement(offset);
! 342: GC_register_displacement((word)sizeof(oh) + offset);
! 343: }
! 344:
! 345: # ifdef GC_ADD_CALLER
! 346: # define EXTRA_ARGS word ra, char * s, int i
! 347: # define OPT_RA ra,
! 348: # else
! 349: # define EXTRA_ARGS char * s, int i
! 350: # define OPT_RA
! 351: # endif
! 352:
! 353: # ifdef __STDC__
! 354: GC_PTR GC_debug_malloc(size_t lb, EXTRA_ARGS)
! 355: # else
! 356: GC_PTR GC_debug_malloc(lb, s, i)
! 357: size_t lb;
! 358: char * s;
! 359: int i;
! 360: # ifdef GC_ADD_CALLER
! 361: --> GC_ADD_CALLER not implemented for K&R C
! 362: # endif
! 363: # endif
! 364: {
! 365: GC_PTR result = GC_malloc(lb + DEBUG_BYTES);
! 366:
! 367: if (result == 0) {
! 368: GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
! 369: (unsigned long) lb);
! 370: GC_err_puts(s);
! 371: GC_err_printf1(":%ld)\n", (unsigned long)i);
! 372: return(0);
! 373: }
! 374: if (!GC_debugging_started) {
! 375: GC_start_debugging();
! 376: }
! 377: ADD_CALL_CHAIN(result, ra);
! 378: return (GC_store_debug_info(result, (word)lb, s, (word)i));
! 379: }
! 380:
! 381: #ifdef STUBBORN_ALLOC
! 382: # ifdef __STDC__
! 383: GC_PTR GC_debug_malloc_stubborn(size_t lb, EXTRA_ARGS)
! 384: # else
! 385: GC_PTR GC_debug_malloc_stubborn(lb, s, i)
! 386: size_t lb;
! 387: char * s;
! 388: int i;
! 389: # endif
! 390: {
! 391: GC_PTR result = GC_malloc_stubborn(lb + DEBUG_BYTES);
! 392:
! 393: if (result == 0) {
! 394: GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
! 395: (unsigned long) lb);
! 396: GC_err_puts(s);
! 397: GC_err_printf1(":%ld)\n", (unsigned long)i);
! 398: return(0);
! 399: }
! 400: if (!GC_debugging_started) {
! 401: GC_start_debugging();
! 402: }
! 403: ADD_CALL_CHAIN(result, ra);
! 404: return (GC_store_debug_info(result, (word)lb, s, (word)i));
! 405: }
! 406:
! 407: void GC_debug_change_stubborn(p)
! 408: GC_PTR p;
! 409: {
! 410: register GC_PTR q = GC_base(p);
! 411: register hdr * hhdr;
! 412:
! 413: if (q == 0) {
! 414: GC_err_printf1("Bad argument: 0x%lx to GC_debug_change_stubborn\n",
! 415: (unsigned long) p);
! 416: ABORT("GC_debug_change_stubborn: bad arg");
! 417: }
! 418: hhdr = HDR(q);
! 419: if (hhdr -> hb_obj_kind != STUBBORN) {
! 420: GC_err_printf1("GC_debug_change_stubborn arg not stubborn: 0x%lx\n",
! 421: (unsigned long) p);
! 422: ABORT("GC_debug_change_stubborn: arg not stubborn");
! 423: }
! 424: GC_change_stubborn(q);
! 425: }
! 426:
! 427: void GC_debug_end_stubborn_change(p)
! 428: GC_PTR p;
! 429: {
! 430: register GC_PTR q = GC_base(p);
! 431: register hdr * hhdr;
! 432:
! 433: if (q == 0) {
! 434: GC_err_printf1("Bad argument: 0x%lx to GC_debug_end_stubborn_change\n",
! 435: (unsigned long) p);
! 436: ABORT("GC_debug_end_stubborn_change: bad arg");
! 437: }
! 438: hhdr = HDR(q);
! 439: if (hhdr -> hb_obj_kind != STUBBORN) {
! 440: GC_err_printf1("debug_end_stubborn_change arg not stubborn: 0x%lx\n",
! 441: (unsigned long) p);
! 442: ABORT("GC_debug_end_stubborn_change: arg not stubborn");
! 443: }
! 444: GC_end_stubborn_change(q);
! 445: }
! 446:
! 447: #endif /* STUBBORN_ALLOC */
! 448:
! 449: # ifdef __STDC__
! 450: GC_PTR GC_debug_malloc_atomic(size_t lb, EXTRA_ARGS)
! 451: # else
! 452: GC_PTR GC_debug_malloc_atomic(lb, s, i)
! 453: size_t lb;
! 454: char * s;
! 455: int i;
! 456: # endif
! 457: {
! 458: GC_PTR result = GC_malloc_atomic(lb + DEBUG_BYTES);
! 459:
! 460: if (result == 0) {
! 461: GC_err_printf1("GC_debug_malloc_atomic(%ld) returning NIL (",
! 462: (unsigned long) lb);
! 463: GC_err_puts(s);
! 464: GC_err_printf1(":%ld)\n", (unsigned long)i);
! 465: return(0);
! 466: }
! 467: if (!GC_debugging_started) {
! 468: GC_start_debugging();
! 469: }
! 470: ADD_CALL_CHAIN(result, ra);
! 471: return (GC_store_debug_info(result, (word)lb, s, (word)i));
! 472: }
! 473:
! 474: # ifdef __STDC__
! 475: GC_PTR GC_debug_malloc_uncollectable(size_t lb, EXTRA_ARGS)
! 476: # else
! 477: GC_PTR GC_debug_malloc_uncollectable(lb, s, i)
! 478: size_t lb;
! 479: char * s;
! 480: int i;
! 481: # endif
! 482: {
! 483: GC_PTR result = GC_malloc_uncollectable(lb + DEBUG_BYTES);
! 484:
! 485: if (result == 0) {
! 486: GC_err_printf1("GC_debug_malloc_uncollectable(%ld) returning NIL (",
! 487: (unsigned long) lb);
! 488: GC_err_puts(s);
! 489: GC_err_printf1(":%ld)\n", (unsigned long)i);
! 490: return(0);
! 491: }
! 492: if (!GC_debugging_started) {
! 493: GC_start_debugging();
! 494: }
! 495: ADD_CALL_CHAIN(result, ra);
! 496: return (GC_store_debug_info(result, (word)lb, s, (word)i));
! 497: }
! 498:
! 499: #ifdef ATOMIC_UNCOLLECTABLE
! 500: # ifdef __STDC__
! 501: GC_PTR GC_debug_malloc_atomic_uncollectable(size_t lb, EXTRA_ARGS)
! 502: # else
! 503: GC_PTR GC_debug_malloc_atomic_uncollectable(lb, s, i)
! 504: size_t lb;
! 505: char * s;
! 506: int i;
! 507: # endif
! 508: {
! 509: GC_PTR result = GC_malloc_atomic_uncollectable(lb + DEBUG_BYTES);
! 510:
! 511: if (result == 0) {
! 512: GC_err_printf1(
! 513: "GC_debug_malloc_atomic_uncollectable(%ld) returning NIL (",
! 514: (unsigned long) lb);
! 515: GC_err_puts(s);
! 516: GC_err_printf1(":%ld)\n", (unsigned long)i);
! 517: return(0);
! 518: }
! 519: if (!GC_debugging_started) {
! 520: GC_start_debugging();
! 521: }
! 522: ADD_CALL_CHAIN(result, ra);
! 523: return (GC_store_debug_info(result, (word)lb, s, (word)i));
! 524: }
! 525: #endif /* ATOMIC_UNCOLLECTABLE */
! 526:
! 527: # ifdef __STDC__
! 528: void GC_debug_free(GC_PTR p)
! 529: # else
! 530: void GC_debug_free(p)
! 531: GC_PTR p;
! 532: # endif
! 533: {
! 534: register GC_PTR base = GC_base(p);
! 535: register ptr_t clobbered;
! 536:
! 537: if (base == 0) {
! 538: GC_err_printf1("Attempt to free invalid pointer %lx\n",
! 539: (unsigned long)p);
! 540: if (p != 0) ABORT("free(invalid pointer)");
! 541: }
! 542: if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
! 543: GC_err_printf1(
! 544: "GC_debug_free called on pointer %lx wo debugging info\n",
! 545: (unsigned long)p);
! 546: } else {
! 547: clobbered = GC_check_annotated_obj((oh *)base);
! 548: if (clobbered != 0) {
! 549: if (((oh *)base) -> oh_sz == GC_size(base)) {
! 550: GC_err_printf0(
! 551: "GC_debug_free: found previously deallocated (?) object at ");
! 552: } else {
! 553: GC_err_printf0("GC_debug_free: found smashed location at ");
! 554: }
! 555: GC_print_smashed_obj(p, clobbered);
! 556: }
! 557: /* Invalidate size */
! 558: ((oh *)base) -> oh_sz = GC_size(base);
! 559: }
! 560: # ifdef FIND_LEAK
! 561: GC_free(base);
! 562: # else
! 563: {
! 564: register hdr * hhdr = HDR(p);
! 565: GC_bool uncollectable = FALSE;
! 566:
! 567: if (hhdr -> hb_obj_kind == UNCOLLECTABLE) {
! 568: uncollectable = TRUE;
! 569: }
! 570: # ifdef ATOMIC_UNCOLLECTABLE
! 571: if (hhdr -> hb_obj_kind == AUNCOLLECTABLE) {
! 572: uncollectable = TRUE;
! 573: }
! 574: # endif
! 575: if (uncollectable) GC_free(base);
! 576: }
! 577: # endif
! 578: }
! 579:
! 580: # ifdef __STDC__
! 581: GC_PTR GC_debug_realloc(GC_PTR p, size_t lb, EXTRA_ARGS)
! 582: # else
! 583: GC_PTR GC_debug_realloc(p, lb, s, i)
! 584: GC_PTR p;
! 585: size_t lb;
! 586: char *s;
! 587: int i;
! 588: # endif
! 589: {
! 590: register GC_PTR base = GC_base(p);
! 591: register ptr_t clobbered;
! 592: register GC_PTR result;
! 593: register size_t copy_sz = lb;
! 594: register size_t old_sz;
! 595: register hdr * hhdr;
! 596:
! 597: if (p == 0) return(GC_debug_malloc(lb, OPT_RA s, i));
! 598: if (base == 0) {
! 599: GC_err_printf1(
! 600: "Attempt to reallocate invalid pointer %lx\n", (unsigned long)p);
! 601: ABORT("realloc(invalid pointer)");
! 602: }
! 603: if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
! 604: GC_err_printf1(
! 605: "GC_debug_realloc called on pointer %lx wo debugging info\n",
! 606: (unsigned long)p);
! 607: return(GC_realloc(p, lb));
! 608: }
! 609: hhdr = HDR(base);
! 610: switch (hhdr -> hb_obj_kind) {
! 611: # ifdef STUBBORN_ALLOC
! 612: case STUBBORN:
! 613: result = GC_debug_malloc_stubborn(lb, OPT_RA s, i);
! 614: break;
! 615: # endif
! 616: case NORMAL:
! 617: result = GC_debug_malloc(lb, OPT_RA s, i);
! 618: break;
! 619: case PTRFREE:
! 620: result = GC_debug_malloc_atomic(lb, OPT_RA s, i);
! 621: break;
! 622: case UNCOLLECTABLE:
! 623: result = GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
! 624: break;
! 625: # ifdef ATOMIC_UNCOLLECTABLE
! 626: case AUNCOLLECTABLE:
! 627: result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
! 628: break;
! 629: # endif
! 630: default:
! 631: GC_err_printf0("GC_debug_realloc: encountered bad kind\n");
! 632: ABORT("bad kind");
! 633: }
! 634: clobbered = GC_check_annotated_obj((oh *)base);
! 635: if (clobbered != 0) {
! 636: GC_err_printf0("GC_debug_realloc: found smashed location at ");
! 637: GC_print_smashed_obj(p, clobbered);
! 638: }
! 639: old_sz = ((oh *)base) -> oh_sz;
! 640: if (old_sz < copy_sz) copy_sz = old_sz;
! 641: if (result == 0) return(0);
! 642: BCOPY(p, result, copy_sz);
! 643: GC_debug_free(p);
! 644: return(result);
! 645: }
! 646:
! 647: /* Check all marked objects in the given block for validity */
! 648: /*ARGSUSED*/
! 649: void GC_check_heap_block(hbp, dummy)
! 650: register struct hblk *hbp; /* ptr to current heap block */
! 651: word dummy;
! 652: {
! 653: register struct hblkhdr * hhdr = HDR(hbp);
! 654: register word sz = hhdr -> hb_sz;
! 655: register int word_no;
! 656: register word *p, *plim;
! 657:
! 658: p = (word *)(hbp->hb_body);
! 659: word_no = HDR_WORDS;
! 660: if (sz > MAXOBJSZ) {
! 661: plim = p;
! 662: } else {
! 663: plim = (word *)((((word)hbp) + HBLKSIZE) - WORDS_TO_BYTES(sz));
! 664: }
! 665: /* go through all words in block */
! 666: while( p <= plim ) {
! 667: if( mark_bit_from_hdr(hhdr, word_no)
! 668: && GC_has_debug_info((ptr_t)p)) {
! 669: ptr_t clobbered = GC_check_annotated_obj((oh *)p);
! 670:
! 671: if (clobbered != 0) {
! 672: GC_err_printf0(
! 673: "GC_check_heap_block: found smashed location at ");
! 674: GC_print_smashed_obj((ptr_t)p, clobbered);
! 675: }
! 676: }
! 677: word_no += sz;
! 678: p += sz;
! 679: }
! 680: }
! 681:
! 682:
! 683: /* This assumes that all accessible objects are marked, and that */
! 684: /* I hold the allocation lock. Normally called by collector. */
! 685: void GC_check_heap_proc()
! 686: {
! 687: # ifndef SMALL_CONFIG
! 688: if (sizeof(oh) & (2 * sizeof(word) - 1) != 0) {
! 689: ABORT("Alignment problem: object header has inappropriate size\n");
! 690: }
! 691: # endif
! 692: GC_apply_to_all_blocks(GC_check_heap_block, (word)0);
! 693: }
! 694:
! 695: struct closure {
! 696: GC_finalization_proc cl_fn;
! 697: GC_PTR cl_data;
! 698: };
! 699:
! 700: # ifdef __STDC__
! 701: void * GC_make_closure(GC_finalization_proc fn, void * data)
! 702: # else
! 703: GC_PTR GC_make_closure(fn, data)
! 704: GC_finalization_proc fn;
! 705: GC_PTR data;
! 706: # endif
! 707: {
! 708: struct closure * result =
! 709: (struct closure *) GC_malloc(sizeof (struct closure));
! 710:
! 711: result -> cl_fn = fn;
! 712: result -> cl_data = data;
! 713: return((GC_PTR)result);
! 714: }
! 715:
! 716: # ifdef __STDC__
! 717: void GC_debug_invoke_finalizer(void * obj, void * data)
! 718: # else
! 719: void GC_debug_invoke_finalizer(obj, data)
! 720: char * obj;
! 721: char * data;
! 722: # endif
! 723: {
! 724: register struct closure * cl = (struct closure *) data;
! 725:
! 726: (*(cl -> cl_fn))((GC_PTR)((char *)obj + sizeof(oh)), cl -> cl_data);
! 727: }
! 728:
! 729:
! 730: # ifdef __STDC__
! 731: void GC_debug_register_finalizer(GC_PTR obj, GC_finalization_proc fn,
! 732: GC_PTR cd, GC_finalization_proc *ofn,
! 733: GC_PTR *ocd)
! 734: # else
! 735: void GC_debug_register_finalizer(obj, fn, cd, ofn, ocd)
! 736: GC_PTR obj;
! 737: GC_finalization_proc fn;
! 738: GC_PTR cd;
! 739: GC_finalization_proc *ofn;
! 740: GC_PTR *ocd;
! 741: # endif
! 742: {
! 743: ptr_t base = GC_base(obj);
! 744: if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
! 745: GC_err_printf1(
! 746: "GC_register_finalizer called with non-base-pointer 0x%lx\n",
! 747: obj);
! 748: }
! 749: GC_register_finalizer(base, GC_debug_invoke_finalizer,
! 750: GC_make_closure(fn,cd), ofn, ocd);
! 751: }
! 752:
! 753: # ifdef __STDC__
! 754: void GC_debug_register_finalizer_no_order
! 755: (GC_PTR obj, GC_finalization_proc fn,
! 756: GC_PTR cd, GC_finalization_proc *ofn,
! 757: GC_PTR *ocd)
! 758: # else
! 759: void GC_debug_register_finalizer_no_order
! 760: (obj, fn, cd, ofn, ocd)
! 761: GC_PTR obj;
! 762: GC_finalization_proc fn;
! 763: GC_PTR cd;
! 764: GC_finalization_proc *ofn;
! 765: GC_PTR *ocd;
! 766: # endif
! 767: {
! 768: ptr_t base = GC_base(obj);
! 769: if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
! 770: GC_err_printf1(
! 771: "GC_register_finalizer_no_order called with non-base-pointer 0x%lx\n",
! 772: obj);
! 773: }
! 774: GC_register_finalizer_no_order(base, GC_debug_invoke_finalizer,
! 775: GC_make_closure(fn,cd), ofn, ocd);
! 776: }
! 777:
! 778: # ifdef __STDC__
! 779: void GC_debug_register_finalizer_ignore_self
! 780: (GC_PTR obj, GC_finalization_proc fn,
! 781: GC_PTR cd, GC_finalization_proc *ofn,
! 782: GC_PTR *ocd)
! 783: # else
! 784: void GC_debug_register_finalizer_ignore_self
! 785: (obj, fn, cd, ofn, ocd)
! 786: GC_PTR obj;
! 787: GC_finalization_proc fn;
! 788: GC_PTR cd;
! 789: GC_finalization_proc *ofn;
! 790: GC_PTR *ocd;
! 791: # endif
! 792: {
! 793: ptr_t base = GC_base(obj);
! 794: if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
! 795: GC_err_printf1(
! 796: "GC_register_finalizer_ignore_self called with non-base-pointer 0x%lx\n",
! 797: obj);
! 798: }
! 799: GC_register_finalizer_ignore_self(base, GC_debug_invoke_finalizer,
! 800: GC_make_closure(fn,cd), ofn, ocd);
! 801: }
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