boehm-gc/dbg_mlc.c

   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) 1999-2004 Hewlett-Packard Development Company, L.P.
   6  * Copyright (C) 2007 Free Software Foundation, Inc
   7  *
   8  * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
   9  * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
  10  *
  11  * Permission is hereby granted to use or copy this program
  12  * for any purpose,  provided the above notices are retained on all copies.
  13  * Permission to modify the code and to distribute modified code is granted,
  14  * provided the above notices are retained, and a notice that the code was
  15  * modified is included with the above copyright notice.
  16  */
  17
  18 #include "private/dbg_mlc.h"
  19
  20 void GC_default_print_heap_obj_proc();
  21 GC_API void GC_register_finalizer_no_order
  22         GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
  23                   GC_finalization_proc *ofn, GC_PTR *ocd));
  24
  25
  26 #ifndef SHORT_DBG_HDRS
  27 /* Check whether object with base pointer p has debugging info  */
  28 /* p is assumed to point to a legitimate object in our part     */
  29 /* of the heap.                                                 */
  30 /* This excludes the check as to whether the back pointer is    */
  31 /* odd, which is added by the GC_HAS_DEBUG_INFO macro.          */
  32 /* Note that if DBG_HDRS_ALL is set, uncollectable objects      */
  33 /* on free lists may not have debug information set.  Thus it's */
  34 /* not always safe to return TRUE, even if the client does      */
  35 /* its part.                                                    */
  36 GC_bool GC_has_other_debug_info(p)
  37 ptr_t p;
  38 {
  39     register oh * ohdr = (oh *)p;
  40     register ptr_t body = (ptr_t)(ohdr + 1);
  41     register word sz = GC_size((ptr_t) ohdr);
  42
  43     if (HBLKPTR((ptr_t)ohdr) != HBLKPTR((ptr_t)body)
  44         || sz < DEBUG_BYTES + EXTRA_BYTES) {
  45         return(FALSE);
  46     }
  47     if (ohdr -> oh_sz == sz) {
  48         /* Object may have had debug info, but has been deallocated     */
  49         return(FALSE);
  50     }
  51     if (ohdr -> oh_sf == (START_FLAG ^ (word)body)) return(TRUE);
  52     if (((word *)ohdr)[BYTES_TO_WORDS(sz)-1] == (END_FLAG ^ (word)body)) {
  53         return(TRUE);
  54     }
  55     return(FALSE);
  56 }
  57 #endif
  58
  59 #ifdef KEEP_BACK_PTRS
  60
  61 # include <stdlib.h>
  62
  63 # if defined(LINUX) || defined(SUNOS4) || defined(SUNOS5) \
  64      || defined(HPUX) || defined(IRIX5) || defined(OSF1)
  65 #   define RANDOM() random()
  66 # else
  67 #   define RANDOM() (long)rand()
  68 # endif
  69
  70   /* Store back pointer to source in dest, if that appears to be possible. */
  71   /* This is not completely safe, since we may mistakenly conclude that    */
  72   /* dest has a debugging wrapper.  But the error probability is very      */
  73   /* small, and this shouldn't be used in production code.                 */
  74   /* We assume that dest is the real base pointer.  Source will usually    */
  75   /* be a pointer to the interior of an object.                            */
  76   void GC_store_back_pointer(ptr_t source, ptr_t dest)
  77   {
  78     if (GC_HAS_DEBUG_INFO(dest)) {
  79       ((oh *)dest) -> oh_back_ptr = HIDE_BACK_PTR(source);
  80     }
  81   }
  82
  83   void GC_marked_for_finalization(ptr_t dest) {
  84     GC_store_back_pointer(MARKED_FOR_FINALIZATION, dest);
  85   }
  86
  87   /* Store information about the object referencing dest in *base_p     */
  88   /* and *offset_p.                                                     */
  89   /*   source is root ==> *base_p = address, *offset_p = 0              */
  90   /*   source is heap object ==> *base_p != 0, *offset_p = offset       */
  91   /*   Returns 1 on success, 0 if source couldn't be determined.        */
  92   /* Dest can be any address within a heap object.                      */
  93   GC_ref_kind GC_get_back_ptr_info(void *dest, void **base_p, size_t *offset_p)
  94   {
  95     oh * hdr = (oh *)GC_base(dest);
  96     ptr_t bp;
  97     ptr_t bp_base;
  98     if (!GC_HAS_DEBUG_INFO((ptr_t) hdr)) return GC_NO_SPACE;
  99     bp = REVEAL_POINTER(hdr -> oh_back_ptr);
 100     if (MARKED_FOR_FINALIZATION == bp) return GC_FINALIZER_REFD;
 101     if (MARKED_FROM_REGISTER == bp) return GC_REFD_FROM_REG;
 102     if (NOT_MARKED == bp) return GC_UNREFERENCED;
 103 #   if ALIGNMENT == 1
 104       /* Heuristically try to fix off by 1 errors we introduced by      */
 105       /* insisting on even addresses.                                   */
 106       {
 107         ptr_t alternate_ptr = bp + 1;
 108         ptr_t target = *(ptr_t *)bp;
 109         ptr_t alternate_target = *(ptr_t *)alternate_ptr;
 110
 111         if (alternate_target >= GC_least_plausible_heap_addr
 112             && alternate_target <= GC_greatest_plausible_heap_addr
 113             && (target < GC_least_plausible_heap_addr
 114                 || target > GC_greatest_plausible_heap_addr)) {
 115             bp = alternate_ptr;
 116         }
 117       }
 118 #   endif
 119     bp_base = GC_base(bp);
 120     if (0 == bp_base) {
 121       *base_p = bp;
 122       *offset_p = 0;
 123       return GC_REFD_FROM_ROOT;
 124     } else {
 125       if (GC_HAS_DEBUG_INFO(bp_base)) bp_base += sizeof(oh);
 126       *base_p = bp_base;
 127       *offset_p = bp - bp_base;
 128       return GC_REFD_FROM_HEAP;
 129     }
 130   }
 131
 132   /* Generate a random heap address.            */
 133   /* The resulting address is in the heap, but  */
 134   /* not necessarily inside a valid object.     */
 135   void *GC_generate_random_heap_address(void)
 136   {
 137     int i;
 138     long heap_offset = RANDOM();
 139     if (GC_heapsize > RAND_MAX) {
 140         heap_offset *= RAND_MAX;
 141         heap_offset += RANDOM();
 142     }
 143     heap_offset %= GC_heapsize;
 144         /* This doesn't yield a uniform distribution, especially if     */
 145         /* e.g. RAND_MAX = 1.5* GC_heapsize.  But for typical cases,    */
 146         /* it's not too bad.                                            */
 147     for (i = 0; i < GC_n_heap_sects; ++ i) {
 148         int size = GC_heap_sects[i].hs_bytes;
 149         if (heap_offset < size) {
 150             return GC_heap_sects[i].hs_start + heap_offset;
 151         } else {
 152             heap_offset -= size;
 153         }
 154     }
 155     ABORT("GC_generate_random_heap_address: size inconsistency");
 156     /*NOTREACHED*/
 157     return 0;
 158   }
 159
 160   /* Generate a random address inside a valid marked heap object. */
 161   void *GC_generate_random_valid_address(void)
 162   {
 163     ptr_t result;
 164     ptr_t base;
 165     for (;;) {
 166         result = GC_generate_random_heap_address();
 167         base = GC_base(result);
 168         if (0 == base) continue;
 169         if (!GC_is_marked(base)) continue;
 170         return result;
 171     }
 172   }
 173
 174   /* Print back trace for p */
 175   void GC_print_backtrace(void *p)
 176   {
 177     void *current = p;
 178     int i;
 179     GC_ref_kind source;
 180     size_t offset;
 181     void *base;
 182
 183     GC_print_heap_obj(GC_base(current));
 184     GC_err_printf0("\n");
 185     for (i = 0; ; ++i) {
 186       source = GC_get_back_ptr_info(current, &base, &offset);
 187       if (GC_UNREFERENCED == source) {
 188         GC_err_printf0("Reference could not be found\n");
 189         goto out;
 190       }
 191       if (GC_NO_SPACE == source) {
 192         GC_err_printf0("No debug info in object: Can't find reference\n");
 193         goto out;
 194       }
 195       GC_err_printf1("Reachable via %d levels of pointers from ",
 196                  (unsigned long)i);
 197       switch(source) {
 198         case GC_REFD_FROM_ROOT:
 199           GC_err_printf1("root at 0x%lx\n\n", (unsigned long)base);
 200           goto out;
 201         case GC_REFD_FROM_REG:
 202           GC_err_printf0("root in register\n\n");
 203           goto out;
 204         case GC_FINALIZER_REFD:
 205           GC_err_printf0("list of finalizable objects\n\n");
 206           goto out;
 207         case GC_REFD_FROM_HEAP:
 208           GC_err_printf1("offset %ld in object:\n", (unsigned long)offset);
 209           /* Take GC_base(base) to get real base, i.e. header. */
 210           GC_print_heap_obj(GC_base(base));
 211           GC_err_printf0("\n");
 212           break;
 213       }
 214       current = base;
 215     }
 216     out:;
 217   }
 218
 219   /* Force a garbage collection and generate a backtrace from a */
 220   /* random heap address.                                       */
 221   void GC_generate_random_backtrace_no_gc(void)
 222   {
 223     void * current;
 224     current = GC_generate_random_valid_address();
 225     GC_printf1("\n****Chose address 0x%lx in object\n", (unsigned long)current);
 226     GC_print_backtrace(current);
 227   }
 228
 229   void GC_generate_random_backtrace(void)
 230   {
 231     GC_gcollect();
 232     GC_generate_random_backtrace_no_gc();
 233   }
 234
 235 #endif /* KEEP_BACK_PTRS */
 236
 237 # define CROSSES_HBLK(p, sz) \
 238         (((word)(p + sizeof(oh) + sz - 1) ^ (word)p) >= HBLKSIZE)
 239 /* Store debugging info into p.  Return displaced pointer. */
 240 /* Assumes we don't hold allocation lock.                  */
 241 ptr_t GC_store_debug_info(p, sz, string, integer)
 242 register ptr_t p;       /* base pointer */
 243 word sz;        /* bytes */
 244 GC_CONST char * string;
 245 word integer;
 246 {
 247     register word * result = (word *)((oh *)p + 1);
 248     DCL_LOCK_STATE;
 249
 250     /* There is some argument that we should dissble signals here.      */
 251     /* But that's expensive.  And this way things should only appear    */
 252     /* inconsistent while we're in the handler.                         */
 253     LOCK();
 254     GC_ASSERT(GC_size(p) >= sizeof(oh) + sz);
 255     GC_ASSERT(!(SMALL_OBJ(sz) && CROSSES_HBLK(p, sz)));
 256 #   ifdef KEEP_BACK_PTRS
 257       ((oh *)p) -> oh_back_ptr = HIDE_BACK_PTR(NOT_MARKED);
 258 #   endif
 259 #   ifdef MAKE_BACK_GRAPH
 260       ((oh *)p) -> oh_bg_ptr = HIDE_BACK_PTR((ptr_t)0);
 261 #   endif
 262     ((oh *)p) -> oh_string = string;
 263     ((oh *)p) -> oh_int = integer;
 264 #   ifndef SHORT_DBG_HDRS
 265       ((oh *)p) -> oh_sz = sz;
 266       ((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
 267       ((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
 268          result[SIMPLE_ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
 269 #   endif
 270     UNLOCK();
 271     return((ptr_t)result);
 272 }
 273
 274 #ifdef DBG_HDRS_ALL
 275 /* Store debugging info into p.  Return displaced pointer.         */
 276 /* This version assumes we do hold the allocation lock.            */
 277 ptr_t GC_store_debug_info_inner(p, sz, string, integer)
 278 register ptr_t p;       /* base pointer */
 279 word sz;        /* bytes */
 280 char * string;
 281 word integer;
 282 {
 283     register word * result = (word *)((oh *)p + 1);
 284
 285     /* There is some argument that we should disable signals here.      */
 286     /* But that's expensive.  And this way things should only appear    */
 287     /* inconsistent while we're in the handler.                         */
 288     GC_ASSERT(GC_size(p) >= sizeof(oh) + sz);
 289     GC_ASSERT(!(SMALL_OBJ(sz) && CROSSES_HBLK(p, sz)));
 290 #   ifdef KEEP_BACK_PTRS
 291       ((oh *)p) -> oh_back_ptr = HIDE_BACK_PTR(NOT_MARKED);
 292 #   endif
 293 #   ifdef MAKE_BACK_GRAPH
 294       ((oh *)p) -> oh_bg_ptr = HIDE_BACK_PTR((ptr_t)0);
 295 #   endif
 296     ((oh *)p) -> oh_string = string;
 297     ((oh *)p) -> oh_int = integer;
 298 #   ifndef SHORT_DBG_HDRS
 299       ((oh *)p) -> oh_sz = sz;
 300       ((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
 301       ((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
 302          result[SIMPLE_ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
 303 #   endif
 304     return((ptr_t)result);
 305 }
 306 #endif
 307
 308 #ifndef SHORT_DBG_HDRS
 309 /* Check the object with debugging info at ohdr         */
 310 /* return NIL if it's OK.  Else return clobbered        */
 311 /* address.                                             */
 312 ptr_t GC_check_annotated_obj(ohdr)
 313 register oh * ohdr;
 314 {
 315     register ptr_t body = (ptr_t)(ohdr + 1);
 316     register word gc_sz = GC_size((ptr_t)ohdr);
 317     if (ohdr -> oh_sz + DEBUG_BYTES > gc_sz) {
 318         return((ptr_t)(&(ohdr -> oh_sz)));
 319     }
 320     if (ohdr -> oh_sf != (START_FLAG ^ (word)body)) {
 321         return((ptr_t)(&(ohdr -> oh_sf)));
 322     }
 323     if (((word *)ohdr)[BYTES_TO_WORDS(gc_sz)-1] != (END_FLAG ^ (word)body)) {
 324         return((ptr_t)((word *)ohdr + BYTES_TO_WORDS(gc_sz)-1));
 325     }
 326     if (((word *)body)[SIMPLE_ROUNDED_UP_WORDS(ohdr -> oh_sz)]
 327         != (END_FLAG ^ (word)body)) {
 328         return((ptr_t)((word *)body + SIMPLE_ROUNDED_UP_WORDS(ohdr -> oh_sz)));
 329     }
 330     return(0);
 331 }
 332 #endif /* !SHORT_DBG_HDRS */
 333
 334 static GC_describe_type_fn GC_describe_type_fns[MAXOBJKINDS] = {0};
 335
 336 void GC_register_describe_type_fn(kind, fn)
 337 int kind;
 338 GC_describe_type_fn fn;
 339 {
 340   GC_describe_type_fns[kind] = fn;
 341 }
 342
 343 /* Print a type description for the object whose client-visible address */
 344 /* is p.                                                                */
 345 void GC_print_type(p)
 346 ptr_t p;
 347 {
 348     hdr * hhdr = GC_find_header(p);
 349     char buffer[GC_TYPE_DESCR_LEN + 1];
 350     int kind = hhdr -> hb_obj_kind;
 351
 352     if (0 != GC_describe_type_fns[kind] && GC_is_marked(GC_base(p))) {
 353         /* This should preclude free list objects except with   */
 354         /* thread-local allocation.                             */
 355         buffer[GC_TYPE_DESCR_LEN] = 0;
 356         (GC_describe_type_fns[kind])(p, buffer);
 357         GC_ASSERT(buffer[GC_TYPE_DESCR_LEN] == 0);
 358         GC_err_puts(buffer);
 359     } else {
 360         switch(kind) {
 361           case PTRFREE:
 362             GC_err_puts("PTRFREE");
 363             break;
 364           case NORMAL:
 365             GC_err_puts("NORMAL");
 366             break;
 367           case UNCOLLECTABLE:
 368             GC_err_puts("UNCOLLECTABLE");
 369             break;
 370 #         ifdef ATOMIC_UNCOLLECTABLE
 371             case AUNCOLLECTABLE:
 372               GC_err_puts("ATOMIC UNCOLLECTABLE");
 373               break;
 374 #         endif
 375           case STUBBORN:
 376             GC_err_puts("STUBBORN");
 377             break;
 378           default:
 379             GC_err_printf2("kind %ld, descr 0x%lx", kind, hhdr -> hb_descr);
 380         }
 381     }
 382 }
 383
 384
 385
 386 void GC_print_obj(p)
 387 ptr_t p;
 388 {
 389     register oh * ohdr = (oh *)GC_base(p);
 390
 391     GC_ASSERT(!I_HOLD_LOCK());
 392     GC_err_printf1("0x%lx (", ((unsigned long)ohdr + sizeof(oh)));
 393     GC_err_puts(ohdr -> oh_string);
 394 #   ifdef SHORT_DBG_HDRS
 395       GC_err_printf1(":%ld, ", (unsigned long)(ohdr -> oh_int));
 396 #   else
 397       GC_err_printf2(":%ld, sz=%ld, ", (unsigned long)(ohdr -> oh_int),
 398                                         (unsigned long)(ohdr -> oh_sz));
 399 #   endif
 400     GC_print_type((ptr_t)(ohdr + 1));
 401     GC_err_puts(")\n");
 402     PRINT_CALL_CHAIN(ohdr);
 403 }
 404
 405 # if defined(__STDC__) || defined(__cplusplus)
 406     void GC_debug_print_heap_obj_proc(ptr_t p)
 407 # else
 408     void GC_debug_print_heap_obj_proc(p)
 409     ptr_t p;
 410 # endif
 411 {
 412     GC_ASSERT(!I_HOLD_LOCK());
 413     if (GC_HAS_DEBUG_INFO(p)) {
 414         GC_print_obj(p);
 415     } else {
 416         GC_default_print_heap_obj_proc(p);
 417     }
 418 }
 419
 420 #ifndef SHORT_DBG_HDRS
 421 void GC_print_smashed_obj(p, clobbered_addr)
 422 ptr_t p, clobbered_addr;
 423 {
 424     register oh * ohdr = (oh *)GC_base(p);
 425
 426     GC_ASSERT(!I_HOLD_LOCK());
 427     GC_err_printf2("0x%lx in object at 0x%lx(", (unsigned long)clobbered_addr,
 428                                                 (unsigned long)p);
 429     if (clobbered_addr <= (ptr_t)(&(ohdr -> oh_sz))
 430         || ohdr -> oh_string == 0) {
 431         GC_err_printf1("<smashed>, appr. sz = %ld)\n",
 432                        (GC_size((ptr_t)ohdr) - DEBUG_BYTES));
 433     } else {
 434         if (ohdr -> oh_string[0] == '\0') {
 435             GC_err_puts("EMPTY(smashed?)");
 436         } else {
 437             GC_err_puts(ohdr -> oh_string);
 438         }
 439         GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
 440                                           (unsigned long)(ohdr -> oh_sz));
 441         PRINT_CALL_CHAIN(ohdr);
 442     }
 443 }
 444 #endif
 445
 446 void GC_check_heap_proc GC_PROTO((void));
 447
 448 void GC_print_all_smashed_proc GC_PROTO((void));
 449
 450 void GC_do_nothing() {}
 451
 452 void GC_start_debugging()
 453 {
 454 #   ifndef SHORT_DBG_HDRS
 455       GC_check_heap = GC_check_heap_proc;
 456       GC_print_all_smashed = GC_print_all_smashed_proc;
 457 #   else
 458       GC_check_heap = GC_do_nothing;
 459       GC_print_all_smashed = GC_do_nothing;
 460 #   endif
 461     GC_print_heap_obj = GC_debug_print_heap_obj_proc;
 462     GC_debugging_started = TRUE;
 463     GC_register_displacement((word)sizeof(oh));
 464 }
 465
 466 size_t GC_debug_header_size = sizeof(oh);
 467
 468 # if defined(__STDC__) || defined(__cplusplus)
 469     void GC_debug_register_displacement(GC_word offset)
 470 # else
 471     void GC_debug_register_displacement(offset)
 472     GC_word offset;
 473 # endif
 474 {
 475     GC_register_displacement(offset);
 476     GC_register_displacement((word)sizeof(oh) + offset);
 477 }
 478
 479 # ifdef __STDC__
 480     GC_PTR GC_debug_malloc(size_t lb, GC_EXTRA_PARAMS)
 481 # else
 482     GC_PTR GC_debug_malloc(lb, s, i)
 483     size_t lb;
 484     char * s;
 485     int i;
 486 #   ifdef GC_ADD_CALLER
 487         --> GC_ADD_CALLER not implemented for K&R C
 488 #   endif
 489 # endif
 490 {
 491     GC_PTR result = GC_malloc(lb + DEBUG_BYTES);
 492
 493     if (result == 0) {
 494         GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
 495                        (unsigned long) lb);
 496         GC_err_puts(s);
 497         GC_err_printf1(":%ld)\n", (unsigned long)i);
 498         return(0);
 499     }
 500     if (!GC_debugging_started) {
 501         GC_start_debugging();
 502     }
 503     ADD_CALL_CHAIN(result, ra);
 504     return (GC_store_debug_info(result, (word)lb, s, (word)i));
 505 }
 506
 507 # ifdef __STDC__
 508     GC_PTR GC_debug_malloc_ignore_off_page(size_t lb, GC_EXTRA_PARAMS)
 509 # else
 510     GC_PTR GC_debug_malloc_ignore_off_page(lb, s, i)
 511     size_t lb;
 512     char * s;
 513     int i;
 514 #   ifdef GC_ADD_CALLER
 515         --> GC_ADD_CALLER not implemented for K&R C
 516 #   endif
 517 # endif
 518 {
 519     GC_PTR result = GC_malloc_ignore_off_page(lb + DEBUG_BYTES);
 520
 521     if (result == 0) {
 522         GC_err_printf1("GC_debug_malloc_ignore_off_page(%ld) returning NIL (",
 523                        (unsigned long) lb);
 524         GC_err_puts(s);
 525         GC_err_printf1(":%ld)\n", (unsigned long)i);
 526         return(0);
 527     }
 528     if (!GC_debugging_started) {
 529         GC_start_debugging();
 530     }
 531     ADD_CALL_CHAIN(result, ra);
 532     return (GC_store_debug_info(result, (word)lb, s, (word)i));
 533 }
 534
 535 # ifdef __STDC__
 536     GC_PTR GC_debug_malloc_atomic_ignore_off_page(size_t lb, GC_EXTRA_PARAMS)
 537 # else
 538     GC_PTR GC_debug_malloc_atomic_ignore_off_page(lb, s, i)
 539     size_t lb;
 540     char * s;
 541     int i;
 542 #   ifdef GC_ADD_CALLER
 543         --> GC_ADD_CALLER not implemented for K&R C
 544 #   endif
 545 # endif
 546 {
 547     GC_PTR result = GC_malloc_atomic_ignore_off_page(lb + DEBUG_BYTES);
 548
 549     if (result == 0) {
 550         GC_err_printf1("GC_debug_malloc_atomic_ignore_off_page(%ld)"
 551                        " returning NIL (", (unsigned long) lb);
 552         GC_err_puts(s);
 553         GC_err_printf1(":%ld)\n", (unsigned long)i);
 554         return(0);
 555     }
 556     if (!GC_debugging_started) {
 557         GC_start_debugging();
 558     }
 559     ADD_CALL_CHAIN(result, ra);
 560     return (GC_store_debug_info(result, (word)lb, s, (word)i));
 561 }
 562
 563 # ifdef DBG_HDRS_ALL
 564 /*
 565  * An allocation function for internal use.
 566  * Normally internally allocated objects do not have debug information.
 567  * But in this case, we need to make sure that all objects have debug
 568  * headers.
 569  * We assume debugging was started in collector initialization,
 570  * and we already hold the GC lock.
 571  */
 572   GC_PTR GC_debug_generic_malloc_inner(size_t lb, int k)
 573   {
 574     GC_PTR result = GC_generic_malloc_inner(lb + DEBUG_BYTES, k);
 575
 576     if (result == 0) {
 577         GC_err_printf1("GC internal allocation (%ld bytes) returning NIL\n",
 578                        (unsigned long) lb);
 579         return(0);
 580     }
 581     ADD_CALL_CHAIN(result, GC_RETURN_ADDR);
 582     return (GC_store_debug_info_inner(result, (word)lb, "INTERNAL", (word)0));
 583   }
 584
 585   GC_PTR GC_debug_generic_malloc_inner_ignore_off_page(size_t lb, int k)
 586   {
 587     GC_PTR result = GC_generic_malloc_inner_ignore_off_page(
 588                                                 lb + DEBUG_BYTES, k);
 589
 590     if (result == 0) {
 591         GC_err_printf1("GC internal allocation (%ld bytes) returning NIL\n",
 592                        (unsigned long) lb);
 593         return(0);
 594     }
 595     ADD_CALL_CHAIN(result, GC_RETURN_ADDR);
 596     return (GC_store_debug_info_inner(result, (word)lb, "INTERNAL", (word)0));
 597   }
 598 # endif
 599
 600 #ifdef STUBBORN_ALLOC
 601 # ifdef __STDC__
 602     GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
 603 # else
 604     GC_PTR GC_debug_malloc_stubborn(lb, s, i)
 605     size_t lb;
 606     char * s;
 607     int i;
 608 # endif
 609 {
 610     GC_PTR result = GC_malloc_stubborn(lb + DEBUG_BYTES);
 611
 612     if (result == 0) {
 613         GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
 614                        (unsigned long) lb);
 615         GC_err_puts(s);
 616         GC_err_printf1(":%ld)\n", (unsigned long)i);
 617         return(0);
 618     }
 619     if (!GC_debugging_started) {
 620         GC_start_debugging();
 621     }
 622     ADD_CALL_CHAIN(result, ra);
 623     return (GC_store_debug_info(result, (word)lb, s, (word)i));
 624 }
 625
 626 void GC_debug_change_stubborn(p)
 627 GC_PTR p;
 628 {
 629     register GC_PTR q = GC_base(p);
 630     register hdr * hhdr;
 631
 632     if (q == 0) {
 633         GC_err_printf1("Bad argument: 0x%lx to GC_debug_change_stubborn\n",
 634                        (unsigned long) p);
 635         ABORT("GC_debug_change_stubborn: bad arg");
 636     }
 637     hhdr = HDR(q);
 638     if (hhdr -> hb_obj_kind != STUBBORN) {
 639         GC_err_printf1("GC_debug_change_stubborn arg not stubborn: 0x%lx\n",
 640                        (unsigned long) p);
 641         ABORT("GC_debug_change_stubborn: arg not stubborn");
 642     }
 643     GC_change_stubborn(q);
 644 }
 645
 646 void GC_debug_end_stubborn_change(p)
 647 GC_PTR p;
 648 {
 649     register GC_PTR q = GC_base(p);
 650     register hdr * hhdr;
 651
 652     if (q == 0) {
 653         GC_err_printf1("Bad argument: 0x%lx to GC_debug_end_stubborn_change\n",
 654                        (unsigned long) p);
 655         ABORT("GC_debug_end_stubborn_change: bad arg");
 656     }
 657     hhdr = HDR(q);
 658     if (hhdr -> hb_obj_kind != STUBBORN) {
 659         GC_err_printf1("debug_end_stubborn_change arg not stubborn: 0x%lx\n",
 660                        (unsigned long) p);
 661         ABORT("GC_debug_end_stubborn_change: arg not stubborn");
 662     }
 663     GC_end_stubborn_change(q);
 664 }
 665
 666 #else /* !STUBBORN_ALLOC */
 667
 668 # ifdef __STDC__
 669     GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
 670 # else
 671     GC_PTR GC_debug_malloc_stubborn(lb, s, i)
 672     size_t lb;
 673     char * s;
 674     int i;
 675 # endif
 676 {
 677     return GC_debug_malloc(lb, OPT_RA s, i);
 678 }
 679
 680 void GC_debug_change_stubborn(p)
 681 GC_PTR p;
 682 {
 683 }
 684
 685 void GC_debug_end_stubborn_change(p)
 686 GC_PTR p;
 687 {
 688 }
 689
 690 #endif /* !STUBBORN_ALLOC */
 691
 692 # ifdef __STDC__
 693     GC_PTR GC_debug_malloc_atomic(size_t lb, GC_EXTRA_PARAMS)
 694 # else
 695     GC_PTR GC_debug_malloc_atomic(lb, s, i)
 696     size_t lb;
 697     char * s;
 698     int i;
 699 # endif
 700 {
 701     GC_PTR result = GC_malloc_atomic(lb + DEBUG_BYTES);
 702
 703     if (result == 0) {
 704         GC_err_printf1("GC_debug_malloc_atomic(%ld) returning NIL (",
 705                       (unsigned long) lb);
 706         GC_err_puts(s);
 707         GC_err_printf1(":%ld)\n", (unsigned long)i);
 708         return(0);
 709     }
 710     if (!GC_debugging_started) {
 711         GC_start_debugging();
 712     }
 713     ADD_CALL_CHAIN(result, ra);
 714     return (GC_store_debug_info(result, (word)lb, s, (word)i));
 715 }
 716
 717 # ifdef __STDC__
 718     GC_PTR GC_debug_malloc_uncollectable(size_t lb, GC_EXTRA_PARAMS)
 719 # else
 720     GC_PTR GC_debug_malloc_uncollectable(lb, s, i)
 721     size_t lb;
 722     char * s;
 723     int i;
 724 # endif
 725 {
 726     GC_PTR result = GC_malloc_uncollectable(lb + UNCOLLECTABLE_DEBUG_BYTES);
 727
 728     if (result == 0) {
 729         GC_err_printf1("GC_debug_malloc_uncollectable(%ld) returning NIL (",
 730                       (unsigned long) lb);
 731         GC_err_puts(s);
 732         GC_err_printf1(":%ld)\n", (unsigned long)i);
 733         return(0);
 734     }
 735     if (!GC_debugging_started) {
 736         GC_start_debugging();
 737     }
 738     ADD_CALL_CHAIN(result, ra);
 739     return (GC_store_debug_info(result, (word)lb, s, (word)i));
 740 }
 741
 742 #ifdef ATOMIC_UNCOLLECTABLE
 743 # ifdef __STDC__
 744     GC_PTR GC_debug_malloc_atomic_uncollectable(size_t lb, GC_EXTRA_PARAMS)
 745 # else
 746     GC_PTR GC_debug_malloc_atomic_uncollectable(lb, s, i)
 747     size_t lb;
 748     char * s;
 749     int i;
 750 # endif
 751 {
 752     GC_PTR result =
 753         GC_malloc_atomic_uncollectable(lb + UNCOLLECTABLE_DEBUG_BYTES);
 754
 755     if (result == 0) {
 756         GC_err_printf1(
 757                 "GC_debug_malloc_atomic_uncollectable(%ld) returning NIL (",
 758                 (unsigned long) lb);
 759         GC_err_puts(s);
 760         GC_err_printf1(":%ld)\n", (unsigned long)i);
 761         return(0);
 762     }
 763     if (!GC_debugging_started) {
 764         GC_start_debugging();
 765     }
 766     ADD_CALL_CHAIN(result, ra);
 767     return (GC_store_debug_info(result, (word)lb, s, (word)i));
 768 }
 769 #endif /* ATOMIC_UNCOLLECTABLE */
 770
 771 # ifdef __STDC__
 772     void GC_debug_free(GC_PTR p)
 773 # else
 774     void GC_debug_free(p)
 775     GC_PTR p;
 776 # endif
 777 {
 778     register GC_PTR base;
 779     register ptr_t clobbered;
 780
 781     if (0 == p) return;
 782     base = GC_base(p);
 783     if (base == 0) {
 784         GC_err_printf1("Attempt to free invalid pointer %lx\n",
 785                        (unsigned long)p);
 786         ABORT("free(invalid pointer)");
 787     }
 788     if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
 789         GC_err_printf1(
 790                   "GC_debug_free called on pointer %lx wo debugging info\n",
 791                   (unsigned long)p);
 792     } else {
 793 #     ifndef SHORT_DBG_HDRS
 794         clobbered = GC_check_annotated_obj((oh *)base);
 795         if (clobbered != 0) {
 796           if (((oh *)base) -> oh_sz == GC_size(base)) {
 797             GC_err_printf0(
 798                   "GC_debug_free: found previously deallocated (?) object at ");
 799           } else {
 800             GC_err_printf0("GC_debug_free: found smashed location at ");
 801           }
 802           GC_print_smashed_obj(p, clobbered);
 803         }
 804         /* Invalidate size */
 805         ((oh *)base) -> oh_sz = GC_size(base);
 806 #     endif /* SHORT_DBG_HDRS */
 807     }
 808     if (GC_find_leak) {
 809         GC_free(base);
 810     } else {
 811         register hdr * hhdr = HDR(p);
 812         GC_bool uncollectable = FALSE;
 813
 814         if (hhdr ->  hb_obj_kind == UNCOLLECTABLE) {
 815             uncollectable = TRUE;
 816         }
 817 #       ifdef ATOMIC_UNCOLLECTABLE
 818             if (hhdr ->  hb_obj_kind == AUNCOLLECTABLE) {
 819                     uncollectable = TRUE;
 820             }
 821 #       endif
 822         if (uncollectable) {
 823             GC_free(base);
 824         } else {
 825             size_t i;
 826             size_t obj_sz = hhdr -> hb_sz - BYTES_TO_WORDS(sizeof(oh));
 827
 828             for (i = 0; i < obj_sz; ++i) ((word *)p)[i] = 0xdeadbeef;
 829             GC_ASSERT((word *)p + i == (word *)base + hhdr -> hb_sz);
 830         }
 831     } /* !GC_find_leak */
 832 }
 833
 834 #ifdef THREADS
 835
 836 extern void GC_free_inner(GC_PTR p);
 837
 838 /* Used internally; we assume it's called correctly.    */
 839 void GC_debug_free_inner(GC_PTR p)
 840 {
 841     GC_free_inner(GC_base(p));
 842 }
 843 #endif
 844
 845 # ifdef __STDC__
 846     GC_PTR GC_debug_realloc(GC_PTR p, size_t lb, GC_EXTRA_PARAMS)
 847 # else
 848     GC_PTR GC_debug_realloc(p, lb, s, i)
 849     GC_PTR p;
 850     size_t lb;
 851     char *s;
 852     int i;
 853 # endif
 854 {
 855     register GC_PTR base = GC_base(p);
 856     register ptr_t clobbered;
 857     register GC_PTR result;
 858     register size_t copy_sz = lb;
 859     register size_t old_sz;
 860     register hdr * hhdr;
 861
 862     if (p == 0) return(GC_debug_malloc(lb, OPT_RA s, i));
 863     if (base == 0) {
 864         GC_err_printf1(
 865               "Attempt to reallocate invalid pointer %lx\n", (unsigned long)p);
 866         ABORT("realloc(invalid pointer)");
 867     }
 868     if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
 869         GC_err_printf1(
 870                 "GC_debug_realloc called on pointer %lx wo debugging info\n",
 871                 (unsigned long)p);
 872         return(GC_realloc(p, lb));
 873     }
 874     hhdr = HDR(base);
 875     switch (hhdr -> hb_obj_kind) {
 876 #    ifdef STUBBORN_ALLOC
 877       case STUBBORN:
 878         result = GC_debug_malloc_stubborn(lb, OPT_RA s, i);
 879         break;
 880 #    endif
 881       case NORMAL:
 882         result = GC_debug_malloc(lb, OPT_RA s, i);
 883         break;
 884       case PTRFREE:
 885         result = GC_debug_malloc_atomic(lb, OPT_RA s, i);
 886         break;
 887       case UNCOLLECTABLE:
 888         result = GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
 889         break;
 890 #    ifdef ATOMIC_UNCOLLECTABLE
 891       case AUNCOLLECTABLE:
 892         result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
 893         break;
 894 #    endif
 895       default:
 896         GC_err_printf0("GC_debug_realloc: encountered bad kind\n");
 897         ABORT("bad kind");
 898     }
 899 #   ifdef SHORT_DBG_HDRS
 900       old_sz = GC_size(base) - sizeof(oh);
 901 #   else
 902       clobbered = GC_check_annotated_obj((oh *)base);
 903       if (clobbered != 0) {
 904         GC_err_printf0("GC_debug_realloc: found smashed location at ");
 905         GC_print_smashed_obj(p, clobbered);
 906       }
 907       old_sz = ((oh *)base) -> oh_sz;
 908 #   endif
 909     if (old_sz < copy_sz) copy_sz = old_sz;
 910     if (result == 0) return(0);
 911     BCOPY(p, result,  copy_sz);
 912     GC_debug_free(p);
 913     return(result);
 914 }
 915
 916 #ifndef SHORT_DBG_HDRS
 917
 918 /* List of smashed objects.  We defer printing these, since we can't    */
 919 /* always print them nicely with the allocation lock held.              */
 920 /* We put them here instead of in GC_arrays, since it may be useful to  */
 921 /* be able to look at them with the debugger.                           */
 922 #define MAX_SMASHED 20
 923 ptr_t GC_smashed[MAX_SMASHED];
 924 unsigned GC_n_smashed = 0;
 925
 926 # if defined(__STDC__) || defined(__cplusplus)
 927     void GC_add_smashed(ptr_t smashed)
 928 # else
 929     void GC_add_smashed(smashed)
 930     ptr_t smashed;
 931 #endif
 932 {
 933     GC_ASSERT(GC_is_marked(GC_base(smashed)));
 934     GC_smashed[GC_n_smashed] = smashed;
 935     if (GC_n_smashed < MAX_SMASHED - 1) ++GC_n_smashed;
 936       /* In case of overflow, we keep the first MAX_SMASHED-1   */
 937       /* entries plus the last one.                             */
 938     GC_have_errors = TRUE;
 939 }
 940
 941 /* Print all objects on the list.  Clear the list.      */
 942 void GC_print_all_smashed_proc ()
 943 {
 944     unsigned i;
 945
 946     GC_ASSERT(!I_HOLD_LOCK());
 947     if (GC_n_smashed == 0) return;
 948     GC_err_printf0("GC_check_heap_block: found smashed heap objects:\n");
 949     for (i = 0; i < GC_n_smashed; ++i) {
 950         GC_print_smashed_obj(GC_base(GC_smashed[i]), GC_smashed[i]);
 951         GC_smashed[i] = 0;
 952     }
 953     GC_n_smashed = 0;
 954 }
 955
 956 /* Check all marked objects in the given block for validity */
 957 /*ARGSUSED*/
 958 # if defined(__STDC__) || defined(__cplusplus)
 959     void GC_check_heap_block(register struct hblk *hbp, word dummy)
 960 # else
 961     void GC_check_heap_block(hbp, dummy)
 962     register struct hblk *hbp;  /* ptr to current heap block            */
 963     word dummy;
 964 # endif
 965 {
 966     register struct hblkhdr * hhdr = HDR(hbp);
 967     register word sz = hhdr -> hb_sz;
 968     register int word_no;
 969     register word *p, *plim;
 970
 971     p = (word *)(hbp->hb_body);
 972     word_no = 0;
 973     if (sz > MAXOBJSZ) {
 974         plim = p;
 975     } else {
 976         plim = (word *)((((word)hbp) + HBLKSIZE) - WORDS_TO_BYTES(sz));
 977     }
 978     /* go through all words in block */
 979         while( p <= plim ) {
 980             if( mark_bit_from_hdr(hhdr, word_no)
 981                 && GC_HAS_DEBUG_INFO((ptr_t)p)) {
 982                 ptr_t clobbered = GC_check_annotated_obj((oh *)p);
 983
 984                 if (clobbered != 0) GC_add_smashed(clobbered);
 985             }
 986             word_no += sz;
 987             p += sz;
 988         }
 989 }
 990
 991
 992 /* This assumes that all accessible objects are marked, and that        */
 993 /* I hold the allocation lock.  Normally called by collector.           */
 994 void GC_check_heap_proc()
 995 {
 996 #   ifndef SMALL_CONFIG
 997 #     ifdef ALIGN_DOUBLE
 998         GC_STATIC_ASSERT((sizeof(oh) & (2 * sizeof(word) - 1)) == 0);
 999 #     else
1000         GC_STATIC_ASSERT((sizeof(oh) & (sizeof(word) - 1)) == 0);
1001 #     endif
1002 #   endif
1003     GC_apply_to_all_blocks(GC_check_heap_block, (word)0);
1004 }
1005
1006 #endif /* !SHORT_DBG_HDRS */
1007
1008 struct closure {
1009     GC_finalization_proc cl_fn;
1010     GC_PTR cl_data;
1011 };
1012
1013 # ifdef __STDC__
1014     void * GC_make_closure(GC_finalization_proc fn, void * data)
1015 # else
1016     GC_PTR GC_make_closure(fn, data)
1017     GC_finalization_proc fn;
1018     GC_PTR data;
1019 # endif
1020 {
1021     struct closure * result =
1022 #   ifdef DBG_HDRS_ALL
1023       (struct closure *) GC_debug_malloc(sizeof (struct closure),
1024                                          GC_EXTRAS);
1025 #   else
1026       (struct closure *) GC_malloc(sizeof (struct closure));
1027 #   endif
1028
1029     result -> cl_fn = fn;
1030     result -> cl_data = data;
1031     return((GC_PTR)result);
1032 }
1033
1034 # ifdef __STDC__
1035     void GC_debug_invoke_finalizer(void * obj, void * data)
1036 # else
1037     void GC_debug_invoke_finalizer(obj, data)
1038     char * obj;
1039     char * data;
1040 # endif
1041 {
1042     register struct closure * cl = (struct closure *) data;
1043
1044     (*(cl -> cl_fn))((GC_PTR)((char *)obj + sizeof(oh)), cl -> cl_data);
1045 }
1046
1047 /* Set ofn and ocd to reflect the values we got back.   */
1048 static void store_old (obj, my_old_fn, my_old_cd, ofn, ocd)
1049 GC_PTR obj;
1050 GC_finalization_proc my_old_fn;
1051 struct closure * my_old_cd;
1052 GC_finalization_proc *ofn;
1053 GC_PTR *ocd;
1054 {
1055     if (0 != my_old_fn) {
1056       if (my_old_fn != GC_debug_invoke_finalizer) {
1057         GC_err_printf1("Debuggable object at 0x%lx had non-debug finalizer.\n",
1058                        obj);
1059         /* This should probably be fatal. */
1060       } else {
1061         if (ofn) *ofn = my_old_cd -> cl_fn;
1062         if (ocd) *ocd = my_old_cd -> cl_data;
1063       }
1064     } else {
1065       if (ofn) *ofn = 0;
1066       if (ocd) *ocd = 0;
1067     }
1068 }
1069
1070 # ifdef __STDC__
1071     void GC_debug_register_finalizer(GC_PTR obj, GC_finalization_proc fn,
1072                                      GC_PTR cd, GC_finalization_proc *ofn,
1073                                      GC_PTR *ocd)
1074 # else
1075     void GC_debug_register_finalizer(obj, fn, cd, ofn, ocd)
1076     GC_PTR obj;
1077     GC_finalization_proc fn;
1078     GC_PTR cd;
1079     GC_finalization_proc *ofn;
1080     GC_PTR *ocd;
1081 # endif
1082 {
1083     GC_finalization_proc my_old_fn;
1084     GC_PTR my_old_cd;
1085     ptr_t base = GC_base(obj);
1086     if (0 == base) return;
1087     if ((ptr_t)obj - base != sizeof(oh)) {
1088         GC_err_printf1(
1089             "GC_debug_register_finalizer called with non-base-pointer 0x%lx\n",
1090             obj);
1091     }
1092     if (0 == fn) {
1093       GC_register_finalizer(base, 0, 0, &my_old_fn, &my_old_cd);
1094     } else {
1095       GC_register_finalizer(base, GC_debug_invoke_finalizer,
1096                             GC_make_closure(fn,cd), &my_old_fn, &my_old_cd);
1097     }
1098     store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
1099 }
1100
1101 # ifdef __STDC__
1102     void GC_debug_register_finalizer_no_order
1103                                     (GC_PTR obj, GC_finalization_proc fn,
1104                                      GC_PTR cd, GC_finalization_proc *ofn,
1105                                      GC_PTR *ocd)
1106 # else
1107     void GC_debug_register_finalizer_no_order
1108                                     (obj, fn, cd, ofn, ocd)
1109     GC_PTR obj;
1110     GC_finalization_proc fn;
1111     GC_PTR cd;
1112     GC_finalization_proc *ofn;
1113     GC_PTR *ocd;
1114 # endif
1115 {
1116     GC_finalization_proc my_old_fn;
1117     GC_PTR my_old_cd;
1118     ptr_t base = GC_base(obj);
1119     if (0 == base) return;
1120     if ((ptr_t)obj - base != sizeof(oh)) {
1121         GC_err_printf1(
1122             "GC_debug_register_finalizer_no_order called with non-base-pointer 0x%lx\n",
1123             obj);
1124     }
1125     if (0 == fn) {
1126       GC_register_finalizer_no_order(base, 0, 0, &my_old_fn, &my_old_cd);
1127     } else {
1128       GC_register_finalizer_no_order(base, GC_debug_invoke_finalizer,
1129                                      GC_make_closure(fn,cd), &my_old_fn,
1130                                      &my_old_cd);
1131     }
1132     store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
1133 }
1134
1135 # ifdef __STDC__
1136     void GC_debug_register_finalizer_unreachable
1137                                     (GC_PTR obj, GC_finalization_proc fn,
1138                                      GC_PTR cd, GC_finalization_proc *ofn,
1139                                      GC_PTR *ocd)
1140 # else
1141     void GC_debug_register_finalizer_unreachable
1142                                     (obj, fn, cd, ofn, ocd)
1143     GC_PTR obj;
1144     GC_finalization_proc fn;
1145     GC_PTR cd;
1146     GC_finalization_proc *ofn;
1147     GC_PTR *ocd;
1148 # endif
1149 {
1150     GC_finalization_proc my_old_fn;
1151     GC_PTR my_old_cd;
1152     ptr_t base = GC_base(obj);
1153     if (0 == base) return;
1154     if ((ptr_t)obj - base != sizeof(oh)) {
1155         GC_err_printf1(
1156             "GC_debug_register_finalizer_unreachable called with non-base-pointer 0x%lx\n",
1157             obj);
1158     }
1159     if (0 == fn) {
1160       GC_register_finalizer_unreachable(base, 0, 0, &my_old_fn, &my_old_cd);
1161     } else {
1162       GC_register_finalizer_unreachable(base, GC_debug_invoke_finalizer,
1163                                      GC_make_closure(fn,cd), &my_old_fn,
1164                                      &my_old_cd);
1165     }
1166     store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
1167 }
1168
1169 # ifdef __STDC__
1170     void GC_debug_register_finalizer_ignore_self
1171                                     (GC_PTR obj, GC_finalization_proc fn,
1172                                      GC_PTR cd, GC_finalization_proc *ofn,
1173                                      GC_PTR *ocd)
1174 # else
1175     void GC_debug_register_finalizer_ignore_self
1176                                     (obj, fn, cd, ofn, ocd)
1177     GC_PTR obj;
1178     GC_finalization_proc fn;
1179     GC_PTR cd;
1180     GC_finalization_proc *ofn;
1181     GC_PTR *ocd;
1182 # endif
1183 {
1184     GC_finalization_proc my_old_fn;
1185     GC_PTR my_old_cd;
1186     ptr_t base = GC_base(obj);
1187     if (0 == base) return;
1188     if ((ptr_t)obj - base != sizeof(oh)) {
1189         GC_err_printf1(
1190             "GC_debug_register_finalizer_ignore_self called with non-base-pointer 0x%lx\n",
1191             obj);
1192     }
1193     if (0 == fn) {
1194       GC_register_finalizer_ignore_self(base, 0, 0, &my_old_fn, &my_old_cd);
1195     } else {
1196       GC_register_finalizer_ignore_self(base, GC_debug_invoke_finalizer,
1197                                      GC_make_closure(fn,cd), &my_old_fn,
1198                                      &my_old_cd);
1199     }
1200     store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
1201 }
1202
1203 #ifdef GC_ADD_CALLER
1204 # define RA GC_RETURN_ADDR,
1205 #else
1206 # define RA
1207 #endif
1208
1209 GC_PTR GC_debug_malloc_replacement(lb)
1210 size_t lb;
1211 {
1212     return GC_debug_malloc(lb, RA "unknown", 0);
1213 }
1214
1215 GC_PTR GC_debug_realloc_replacement(p, lb)
1216 GC_PTR p;
1217 size_t lb;
1218 {
1219     return GC_debug_realloc(p, lb, RA "unknown", 0);
1220 }