Annotation of OpenXM_contrib/gc/misc.c, Revision 1.1
1.1 ! maekawa 1: /*
! 2: * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
! 3: * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
! 4: *
! 5: * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
! 6: * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
! 7: *
! 8: * Permission is hereby granted to use or copy this program
! 9: * for any purpose, provided the above notices are retained on all copies.
! 10: * Permission to modify the code and to distribute modified code is granted,
! 11: * provided the above notices are retained, and a notice that the code was
! 12: * modified is included with the above copyright notice.
! 13: */
! 14: /* Boehm, July 31, 1995 5:02 pm PDT */
! 15:
! 16:
! 17: #include <stdio.h>
! 18: #include <signal.h>
! 19:
! 20: #define I_HIDE_POINTERS /* To make GC_call_with_alloc_lock visible */
! 21: #include "gc_priv.h"
! 22:
! 23: #ifdef SOLARIS_THREADS
! 24: # include <sys/syscall.h>
! 25: #endif
! 26: #ifdef MSWIN32
! 27: # include <windows.h>
! 28: #endif
! 29:
! 30: # ifdef THREADS
! 31: # ifdef PCR
! 32: # include "il/PCR_IL.h"
! 33: PCR_Th_ML GC_allocate_ml;
! 34: # else
! 35: # ifdef SRC_M3
! 36: /* Critical section counter is defined in the M3 runtime */
! 37: /* That's all we use. */
! 38: # else
! 39: # ifdef SOLARIS_THREADS
! 40: mutex_t GC_allocate_ml; /* Implicitly initialized. */
! 41: # else
! 42: # ifdef WIN32_THREADS
! 43: GC_API CRITICAL_SECTION GC_allocate_ml;
! 44: # else
! 45: # if defined(IRIX_THREADS) || defined(LINUX_THREADS) \
! 46: || defined(IRIX_JDK_THREADS)
! 47: # ifdef UNDEFINED
! 48: pthread_mutex_t GC_allocate_ml = PTHREAD_MUTEX_INITIALIZER;
! 49: # endif
! 50: pthread_t GC_lock_holder = NO_THREAD;
! 51: # else
! 52: --> declare allocator lock here
! 53: # endif
! 54: # endif
! 55: # endif
! 56: # endif
! 57: # endif
! 58: # endif
! 59:
! 60: GC_FAR struct _GC_arrays GC_arrays /* = { 0 } */;
! 61:
! 62:
! 63: GC_bool GC_debugging_started = FALSE;
! 64: /* defined here so we don't have to load debug_malloc.o */
! 65:
! 66: void (*GC_check_heap)() = (void (*)())0;
! 67:
! 68: void (*GC_start_call_back)() = (void (*)())0;
! 69:
! 70: ptr_t GC_stackbottom = 0;
! 71:
! 72: GC_bool GC_dont_gc = 0;
! 73:
! 74: GC_bool GC_quiet = 0;
! 75:
! 76: /*ARGSUSED*/
! 77: GC_PTR GC_default_oom_fn GC_PROTO((size_t bytes_requested))
! 78: {
! 79: return(0);
! 80: }
! 81:
! 82: GC_PTR (*GC_oom_fn) GC_PROTO((size_t bytes_requested)) = GC_default_oom_fn;
! 83:
! 84: extern signed_word GC_mem_found;
! 85:
! 86: # ifdef MERGE_SIZES
! 87: /* Set things up so that GC_size_map[i] >= words(i), */
! 88: /* but not too much bigger */
! 89: /* and so that size_map contains relatively few distinct entries */
! 90: /* This is stolen from Russ Atkinson's Cedar quantization */
! 91: /* alogrithm (but we precompute it). */
! 92:
! 93:
! 94: void GC_init_size_map()
! 95: {
! 96: register unsigned i;
! 97:
! 98: /* Map size 0 to 1. This avoids problems at lower levels. */
! 99: GC_size_map[0] = 1;
! 100: /* One word objects don't have to be 2 word aligned. */
! 101: for (i = 1; i < sizeof(word); i++) {
! 102: GC_size_map[i] = 1;
! 103: }
! 104: GC_size_map[sizeof(word)] = ROUNDED_UP_WORDS(sizeof(word));
! 105: for (i = sizeof(word) + 1; i <= 8 * sizeof(word); i++) {
! 106: # ifdef ALIGN_DOUBLE
! 107: GC_size_map[i] = (ROUNDED_UP_WORDS(i) + 1) & (~1);
! 108: # else
! 109: GC_size_map[i] = ROUNDED_UP_WORDS(i);
! 110: # endif
! 111: }
! 112: for (i = 8*sizeof(word) + 1; i <= 16 * sizeof(word); i++) {
! 113: GC_size_map[i] = (ROUNDED_UP_WORDS(i) + 1) & (~1);
! 114: }
! 115: /* We leave the rest of the array to be filled in on demand. */
! 116: }
! 117:
! 118: /* Fill in additional entries in GC_size_map, including the ith one */
! 119: /* We assume the ith entry is currently 0. */
! 120: /* Note that a filled in section of the array ending at n always */
! 121: /* has length at least n/4. */
! 122: void GC_extend_size_map(i)
! 123: word i;
! 124: {
! 125: word orig_word_sz = ROUNDED_UP_WORDS(i);
! 126: word word_sz = orig_word_sz;
! 127: register word byte_sz = WORDS_TO_BYTES(word_sz);
! 128: /* The size we try to preserve. */
! 129: /* Close to to i, unless this would */
! 130: /* introduce too many distinct sizes. */
! 131: word smaller_than_i = byte_sz - (byte_sz >> 3);
! 132: word much_smaller_than_i = byte_sz - (byte_sz >> 2);
! 133: register word low_limit; /* The lowest indexed entry we */
! 134: /* initialize. */
! 135: register word j;
! 136:
! 137: if (GC_size_map[smaller_than_i] == 0) {
! 138: low_limit = much_smaller_than_i;
! 139: while (GC_size_map[low_limit] != 0) low_limit++;
! 140: } else {
! 141: low_limit = smaller_than_i + 1;
! 142: while (GC_size_map[low_limit] != 0) low_limit++;
! 143: word_sz = ROUNDED_UP_WORDS(low_limit);
! 144: word_sz += word_sz >> 3;
! 145: if (word_sz < orig_word_sz) word_sz = orig_word_sz;
! 146: }
! 147: # ifdef ALIGN_DOUBLE
! 148: word_sz += 1;
! 149: word_sz &= ~1;
! 150: # endif
! 151: if (word_sz > MAXOBJSZ) {
! 152: word_sz = MAXOBJSZ;
! 153: }
! 154: /* If we can fit the same number of larger objects in a block, */
! 155: /* do so. */
! 156: {
! 157: size_t number_of_objs = BODY_SZ/word_sz;
! 158: word_sz = BODY_SZ/number_of_objs;
! 159: # ifdef ALIGN_DOUBLE
! 160: word_sz &= ~1;
! 161: # endif
! 162: }
! 163: byte_sz = WORDS_TO_BYTES(word_sz);
! 164: # ifdef ADD_BYTE_AT_END
! 165: /* We need one extra byte; don't fill in GC_size_map[byte_sz] */
! 166: byte_sz--;
! 167: # endif
! 168:
! 169: for (j = low_limit; j <= byte_sz; j++) GC_size_map[j] = word_sz;
! 170: }
! 171: # endif
! 172:
! 173:
! 174: /*
! 175: * The following is a gross hack to deal with a problem that can occur
! 176: * on machines that are sloppy about stack frame sizes, notably SPARC.
! 177: * Bogus pointers may be written to the stack and not cleared for
! 178: * a LONG time, because they always fall into holes in stack frames
! 179: * that are not written. We partially address this by clearing
! 180: * sections of the stack whenever we get control.
! 181: */
! 182: word GC_stack_last_cleared = 0; /* GC_no when we last did this */
! 183: # ifdef THREADS
! 184: # define CLEAR_SIZE 2048
! 185: # else
! 186: # define CLEAR_SIZE 213
! 187: # endif
! 188: # define DEGRADE_RATE 50
! 189:
! 190: word GC_min_sp; /* Coolest stack pointer value from which we've */
! 191: /* already cleared the stack. */
! 192:
! 193: # ifdef STACK_GROWS_DOWN
! 194: # define COOLER_THAN >
! 195: # define HOTTER_THAN <
! 196: # define MAKE_COOLER(x,y) if ((word)(x)+(y) > (word)(x)) {(x) += (y);} \
! 197: else {(x) = (word)ONES;}
! 198: # define MAKE_HOTTER(x,y) (x) -= (y)
! 199: # else
! 200: # define COOLER_THAN <
! 201: # define HOTTER_THAN >
! 202: # define MAKE_COOLER(x,y) if ((word)(x)-(y) < (word)(x)) {(x) -= (y);} else {(x) = 0;}
! 203: # define MAKE_HOTTER(x,y) (x) += (y)
! 204: # endif
! 205:
! 206: word GC_high_water;
! 207: /* "hottest" stack pointer value we have seen */
! 208: /* recently. Degrades over time. */
! 209:
! 210: word GC_words_allocd_at_reset;
! 211:
! 212: #if defined(ASM_CLEAR_CODE) && !defined(THREADS)
! 213: extern ptr_t GC_clear_stack_inner();
! 214: #endif
! 215:
! 216: #if !defined(ASM_CLEAR_CODE) && !defined(THREADS)
! 217: /* Clear the stack up to about limit. Return arg. */
! 218: /*ARGSUSED*/
! 219: ptr_t GC_clear_stack_inner(arg, limit)
! 220: ptr_t arg;
! 221: word limit;
! 222: {
! 223: word dummy[CLEAR_SIZE];
! 224:
! 225: BZERO(dummy, CLEAR_SIZE*sizeof(word));
! 226: if ((word)(dummy) COOLER_THAN limit) {
! 227: (void) GC_clear_stack_inner(arg, limit);
! 228: }
! 229: /* Make sure the recursive call is not a tail call, and the bzero */
! 230: /* call is not recognized as dead code. */
! 231: GC_noop1((word)dummy);
! 232: return(arg);
! 233: }
! 234: #endif
! 235:
! 236: /* Clear some of the inaccessible part of the stack. Returns its */
! 237: /* argument, so it can be used in a tail call position, hence clearing */
! 238: /* another frame. */
! 239: ptr_t GC_clear_stack(arg)
! 240: ptr_t arg;
! 241: {
! 242: register word sp = (word)GC_approx_sp(); /* Hotter than actual sp */
! 243: # ifdef THREADS
! 244: word dummy[CLEAR_SIZE];
! 245: # else
! 246: register word limit;
! 247: # endif
! 248:
! 249: # define SLOP 400
! 250: /* Extra bytes we clear every time. This clears our own */
! 251: /* activation record, and should cause more frequent */
! 252: /* clearing near the cold end of the stack, a good thing. */
! 253: # define GC_SLOP 4000
! 254: /* We make GC_high_water this much hotter than we really saw */
! 255: /* saw it, to cover for GC noise etc. above our current frame. */
! 256: # define CLEAR_THRESHOLD 100000
! 257: /* We restart the clearing process after this many bytes of */
! 258: /* allocation. Otherwise very heavily recursive programs */
! 259: /* with sparse stacks may result in heaps that grow almost */
! 260: /* without bounds. As the heap gets larger, collection */
! 261: /* frequency decreases, thus clearing frequency would decrease, */
! 262: /* thus more junk remains accessible, thus the heap gets */
! 263: /* larger ... */
! 264: # ifdef THREADS
! 265: BZERO(dummy, CLEAR_SIZE*sizeof(word));
! 266: # else
! 267: if (GC_gc_no > GC_stack_last_cleared) {
! 268: /* Start things over, so we clear the entire stack again */
! 269: if (GC_stack_last_cleared == 0) GC_high_water = (word) GC_stackbottom;
! 270: GC_min_sp = GC_high_water;
! 271: GC_stack_last_cleared = GC_gc_no;
! 272: GC_words_allocd_at_reset = GC_words_allocd;
! 273: }
! 274: /* Adjust GC_high_water */
! 275: MAKE_COOLER(GC_high_water, WORDS_TO_BYTES(DEGRADE_RATE) + GC_SLOP);
! 276: if (sp HOTTER_THAN GC_high_water) {
! 277: GC_high_water = sp;
! 278: }
! 279: MAKE_HOTTER(GC_high_water, GC_SLOP);
! 280: limit = GC_min_sp;
! 281: MAKE_HOTTER(limit, SLOP);
! 282: if (sp COOLER_THAN limit) {
! 283: limit &= ~0xf; /* Make it sufficiently aligned for assembly */
! 284: /* implementations of GC_clear_stack_inner. */
! 285: GC_min_sp = sp;
! 286: return(GC_clear_stack_inner(arg, limit));
! 287: } else if (WORDS_TO_BYTES(GC_words_allocd - GC_words_allocd_at_reset)
! 288: > CLEAR_THRESHOLD) {
! 289: /* Restart clearing process, but limit how much clearing we do. */
! 290: GC_min_sp = sp;
! 291: MAKE_HOTTER(GC_min_sp, CLEAR_THRESHOLD/4);
! 292: if (GC_min_sp HOTTER_THAN GC_high_water) GC_min_sp = GC_high_water;
! 293: GC_words_allocd_at_reset = GC_words_allocd;
! 294: }
! 295: # endif
! 296: return(arg);
! 297: }
! 298:
! 299:
! 300: /* Return a pointer to the base address of p, given a pointer to a */
! 301: /* an address within an object. Return 0 o.w. */
! 302: # ifdef __STDC__
! 303: GC_PTR GC_base(GC_PTR p)
! 304: # else
! 305: GC_PTR GC_base(p)
! 306: GC_PTR p;
! 307: # endif
! 308: {
! 309: register word r;
! 310: register struct hblk *h;
! 311: register bottom_index *bi;
! 312: register hdr *candidate_hdr;
! 313: register word limit;
! 314:
! 315: r = (word)p;
! 316: if (!GC_is_initialized) return 0;
! 317: h = HBLKPTR(r);
! 318: GET_BI(r, bi);
! 319: candidate_hdr = HDR_FROM_BI(bi, r);
! 320: if (candidate_hdr == 0) return(0);
! 321: /* If it's a pointer to the middle of a large object, move it */
! 322: /* to the beginning. */
! 323: while (IS_FORWARDING_ADDR_OR_NIL(candidate_hdr)) {
! 324: h = FORWARDED_ADDR(h,candidate_hdr);
! 325: r = (word)h + HDR_BYTES;
! 326: candidate_hdr = HDR(h);
! 327: }
! 328: if (candidate_hdr -> hb_map == GC_invalid_map) return(0);
! 329: /* Make sure r points to the beginning of the object */
! 330: r &= ~(WORDS_TO_BYTES(1) - 1);
! 331: {
! 332: register int offset = (char *)r - (char *)(HBLKPTR(r));
! 333: register signed_word sz = candidate_hdr -> hb_sz;
! 334:
! 335: # ifdef ALL_INTERIOR_POINTERS
! 336: register map_entry_type map_entry;
! 337:
! 338: map_entry = MAP_ENTRY((candidate_hdr -> hb_map), offset);
! 339: if (map_entry == OBJ_INVALID) {
! 340: return(0);
! 341: }
! 342: r -= WORDS_TO_BYTES(map_entry);
! 343: limit = r + WORDS_TO_BYTES(sz);
! 344: # else
! 345: register int correction;
! 346:
! 347: offset = BYTES_TO_WORDS(offset - HDR_BYTES);
! 348: correction = offset % sz;
! 349: r -= (WORDS_TO_BYTES(correction));
! 350: limit = r + WORDS_TO_BYTES(sz);
! 351: if (limit > (word)(h + 1)
! 352: && sz <= BYTES_TO_WORDS(HBLKSIZE) - HDR_WORDS) {
! 353: return(0);
! 354: }
! 355: # endif
! 356: if ((word)p >= limit) return(0);
! 357: }
! 358: return((GC_PTR)r);
! 359: }
! 360:
! 361:
! 362: /* Return the size of an object, given a pointer to its base. */
! 363: /* (For small obects this also happens to work from interior pointers, */
! 364: /* but that shouldn't be relied upon.) */
! 365: # ifdef __STDC__
! 366: size_t GC_size(GC_PTR p)
! 367: # else
! 368: size_t GC_size(p)
! 369: GC_PTR p;
! 370: # endif
! 371: {
! 372: register int sz;
! 373: register hdr * hhdr = HDR(p);
! 374:
! 375: sz = WORDS_TO_BYTES(hhdr -> hb_sz);
! 376: if (sz < 0) {
! 377: return(-sz);
! 378: } else {
! 379: return(sz);
! 380: }
! 381: }
! 382:
! 383: size_t GC_get_heap_size GC_PROTO(())
! 384: {
! 385: return ((size_t) GC_heapsize);
! 386: }
! 387:
! 388: size_t GC_get_bytes_since_gc GC_PROTO(())
! 389: {
! 390: return ((size_t) WORDS_TO_BYTES(GC_words_allocd));
! 391: }
! 392:
! 393: GC_bool GC_is_initialized = FALSE;
! 394:
! 395: void GC_init()
! 396: {
! 397: DCL_LOCK_STATE;
! 398:
! 399: DISABLE_SIGNALS();
! 400: LOCK();
! 401: GC_init_inner();
! 402: UNLOCK();
! 403: ENABLE_SIGNALS();
! 404:
! 405: }
! 406:
! 407: #ifdef MSWIN32
! 408: extern void GC_init_win32();
! 409: #endif
! 410:
! 411: extern void GC_setpagesize();
! 412:
! 413: void GC_init_inner()
! 414: {
! 415: # ifndef THREADS
! 416: word dummy;
! 417: # endif
! 418:
! 419: if (GC_is_initialized) return;
! 420: GC_setpagesize();
! 421: GC_exclude_static_roots(beginGC_arrays, end_gc_area);
! 422: # ifdef PRINTSTATS
! 423: if ((ptr_t)endGC_arrays != (ptr_t)(&GC_obj_kinds)) {
! 424: GC_printf0("Reordering linker, didn't exclude obj_kinds\n");
! 425: }
! 426: # endif
! 427: # ifdef MSWIN32
! 428: GC_init_win32();
! 429: # endif
! 430: # if defined(LINUX) && defined(POWERPC)
! 431: GC_init_linuxppc();
! 432: # endif
! 433: # if defined(LINUX) && defined(SPARC)
! 434: GC_init_linuxsparc();
! 435: # endif
! 436: # ifdef SOLARIS_THREADS
! 437: GC_thr_init();
! 438: /* We need dirty bits in order to find live stack sections. */
! 439: GC_dirty_init();
! 440: # endif
! 441: # if defined(IRIX_THREADS) || defined(LINUX_THREADS) \
! 442: || defined(IRIX_JDK_THREADS)
! 443: GC_thr_init();
! 444: # endif
! 445: # if !defined(THREADS) || defined(SOLARIS_THREADS) || defined(WIN32_THREADS) \
! 446: || defined(IRIX_THREADS) || defined(LINUX_THREADS)
! 447: if (GC_stackbottom == 0) {
! 448: GC_stackbottom = GC_get_stack_base();
! 449: }
! 450: # endif
! 451: if (sizeof (ptr_t) != sizeof(word)) {
! 452: ABORT("sizeof (ptr_t) != sizeof(word)\n");
! 453: }
! 454: if (sizeof (signed_word) != sizeof(word)) {
! 455: ABORT("sizeof (signed_word) != sizeof(word)\n");
! 456: }
! 457: if (sizeof (struct hblk) != HBLKSIZE) {
! 458: ABORT("sizeof (struct hblk) != HBLKSIZE\n");
! 459: }
! 460: # ifndef THREADS
! 461: # if defined(STACK_GROWS_UP) && defined(STACK_GROWS_DOWN)
! 462: ABORT(
! 463: "Only one of STACK_GROWS_UP and STACK_GROWS_DOWN should be defd\n");
! 464: # endif
! 465: # if !defined(STACK_GROWS_UP) && !defined(STACK_GROWS_DOWN)
! 466: ABORT(
! 467: "One of STACK_GROWS_UP and STACK_GROWS_DOWN should be defd\n");
! 468: # endif
! 469: # ifdef STACK_GROWS_DOWN
! 470: if ((word)(&dummy) > (word)GC_stackbottom) {
! 471: GC_err_printf0(
! 472: "STACK_GROWS_DOWN is defd, but stack appears to grow up\n");
! 473: # ifndef UTS4 /* Compiler bug workaround */
! 474: GC_err_printf2("sp = 0x%lx, GC_stackbottom = 0x%lx\n",
! 475: (unsigned long) (&dummy),
! 476: (unsigned long) GC_stackbottom);
! 477: # endif
! 478: ABORT("stack direction 3\n");
! 479: }
! 480: # else
! 481: if ((word)(&dummy) < (word)GC_stackbottom) {
! 482: GC_err_printf0(
! 483: "STACK_GROWS_UP is defd, but stack appears to grow down\n");
! 484: GC_err_printf2("sp = 0x%lx, GC_stackbottom = 0x%lx\n",
! 485: (unsigned long) (&dummy),
! 486: (unsigned long) GC_stackbottom);
! 487: ABORT("stack direction 4");
! 488: }
! 489: # endif
! 490: # endif
! 491: # if !defined(_AUX_SOURCE) || defined(__GNUC__)
! 492: if ((word)(-1) < (word)0) {
! 493: GC_err_printf0("The type word should be an unsigned integer type\n");
! 494: GC_err_printf0("It appears to be signed\n");
! 495: ABORT("word");
! 496: }
! 497: # endif
! 498: if ((signed_word)(-1) >= (signed_word)0) {
! 499: GC_err_printf0(
! 500: "The type signed_word should be a signed integer type\n");
! 501: GC_err_printf0("It appears to be unsigned\n");
! 502: ABORT("signed_word");
! 503: }
! 504:
! 505: /* Add initial guess of root sets. Do this first, since sbrk(0) */
! 506: /* might be used. */
! 507: GC_register_data_segments();
! 508: GC_init_headers();
! 509: GC_bl_init();
! 510: GC_mark_init();
! 511: if (!GC_expand_hp_inner((word)MINHINCR)) {
! 512: GC_err_printf0("Can't start up: not enough memory\n");
! 513: EXIT();
! 514: }
! 515: /* Preallocate large object map. It's otherwise inconvenient to */
! 516: /* deal with failure. */
! 517: if (!GC_add_map_entry((word)0)) {
! 518: GC_err_printf0("Can't start up: not enough memory\n");
! 519: EXIT();
! 520: }
! 521: GC_register_displacement_inner(0L);
! 522: # ifdef MERGE_SIZES
! 523: GC_init_size_map();
! 524: # endif
! 525: # ifdef PCR
! 526: if (PCR_IL_Lock(PCR_Bool_false, PCR_allSigsBlocked, PCR_waitForever)
! 527: != PCR_ERes_okay) {
! 528: ABORT("Can't lock load state\n");
! 529: } else if (PCR_IL_Unlock() != PCR_ERes_okay) {
! 530: ABORT("Can't unlock load state\n");
! 531: }
! 532: PCR_IL_Unlock();
! 533: GC_pcr_install();
! 534: # endif
! 535: /* Get black list set up */
! 536: GC_gcollect_inner();
! 537: # ifdef STUBBORN_ALLOC
! 538: GC_stubborn_init();
! 539: # endif
! 540: GC_is_initialized = TRUE;
! 541: /* Convince lint that some things are used */
! 542: # ifdef LINT
! 543: {
! 544: extern char * GC_copyright[];
! 545: extern int GC_read();
! 546: extern void GC_register_finalizer_no_order();
! 547:
! 548: GC_noop(GC_copyright, GC_find_header,
! 549: GC_push_one, GC_call_with_alloc_lock, GC_read,
! 550: GC_dont_expand,
! 551: # ifndef NO_DEBUGGING
! 552: GC_dump,
! 553: # endif
! 554: GC_register_finalizer_no_order);
! 555: }
! 556: # endif
! 557: }
! 558:
! 559: void GC_enable_incremental GC_PROTO(())
! 560: {
! 561: # if !defined(FIND_LEAK) && !defined(SMALL_CONFIG)
! 562: DCL_LOCK_STATE;
! 563:
! 564: DISABLE_SIGNALS();
! 565: LOCK();
! 566: if (GC_incremental) goto out;
! 567: GC_setpagesize();
! 568: # ifdef MSWIN32
! 569: {
! 570: extern GC_bool GC_is_win32s();
! 571:
! 572: /* VirtualProtect is not functional under win32s. */
! 573: if (GC_is_win32s()) goto out;
! 574: }
! 575: # endif /* MSWIN32 */
! 576: # ifndef SOLARIS_THREADS
! 577: GC_dirty_init();
! 578: # endif
! 579: if (!GC_is_initialized) {
! 580: GC_init_inner();
! 581: }
! 582: if (GC_dont_gc) {
! 583: /* Can't easily do it. */
! 584: UNLOCK();
! 585: ENABLE_SIGNALS();
! 586: return;
! 587: }
! 588: if (GC_words_allocd > 0) {
! 589: /* There may be unmarked reachable objects */
! 590: GC_gcollect_inner();
! 591: } /* else we're OK in assuming everything's */
! 592: /* clean since nothing can point to an */
! 593: /* unmarked object. */
! 594: GC_read_dirty();
! 595: GC_incremental = TRUE;
! 596: out:
! 597: UNLOCK();
! 598: ENABLE_SIGNALS();
! 599: # endif
! 600: }
! 601:
! 602:
! 603: #ifdef MSWIN32
! 604: # define LOG_FILE "gc.log"
! 605:
! 606: HANDLE GC_stdout = 0, GC_stderr;
! 607: int GC_tmp;
! 608: DWORD GC_junk;
! 609:
! 610: void GC_set_files()
! 611: {
! 612: if (!GC_stdout) {
! 613: GC_stdout = CreateFile(LOG_FILE, GENERIC_WRITE,
! 614: FILE_SHARE_READ | FILE_SHARE_WRITE,
! 615: NULL, CREATE_ALWAYS, FILE_FLAG_WRITE_THROUGH,
! 616: NULL);
! 617: if (INVALID_HANDLE_VALUE == GC_stdout) ABORT("Open of log file failed");
! 618: }
! 619: if (GC_stderr == 0) {
! 620: GC_stderr = GC_stdout;
! 621: }
! 622: }
! 623:
! 624: #endif
! 625:
! 626: #if defined(OS2) || defined(MACOS)
! 627: FILE * GC_stdout = NULL;
! 628: FILE * GC_stderr = NULL;
! 629: int GC_tmp; /* Should really be local ... */
! 630:
! 631: void GC_set_files()
! 632: {
! 633: if (GC_stdout == NULL) {
! 634: GC_stdout = stdout;
! 635: }
! 636: if (GC_stderr == NULL) {
! 637: GC_stderr = stderr;
! 638: }
! 639: }
! 640: #endif
! 641:
! 642: #if !defined(OS2) && !defined(MACOS) && !defined(MSWIN32)
! 643: int GC_stdout = 1;
! 644: int GC_stderr = 2;
! 645: # if !defined(AMIGA)
! 646: # include <unistd.h>
! 647: # endif
! 648: #endif
! 649:
! 650: #if !defined(MSWIN32) && !defined(OS2) && !defined(MACOS)
! 651: int GC_write(fd, buf, len)
! 652: int fd;
! 653: char *buf;
! 654: size_t len;
! 655: {
! 656: register int bytes_written = 0;
! 657: register int result;
! 658:
! 659: while (bytes_written < len) {
! 660: # ifdef SOLARIS_THREADS
! 661: result = syscall(SYS_write, fd, buf + bytes_written,
! 662: len - bytes_written);
! 663: # else
! 664: result = write(fd, buf + bytes_written, len - bytes_written);
! 665: # endif
! 666: if (-1 == result) return(result);
! 667: bytes_written += result;
! 668: }
! 669: return(bytes_written);
! 670: }
! 671: #endif /* UN*X */
! 672:
! 673: #ifdef MSWIN32
! 674: # define WRITE(f, buf, len) (GC_set_files(), \
! 675: GC_tmp = WriteFile((f), (buf), \
! 676: (len), &GC_junk, NULL),\
! 677: (GC_tmp? 1 : -1))
! 678: #else
! 679: # if defined(OS2) || defined(MACOS)
! 680: # define WRITE(f, buf, len) (GC_set_files(), \
! 681: GC_tmp = fwrite((buf), 1, (len), (f)), \
! 682: fflush(f), GC_tmp)
! 683: # else
! 684: # define WRITE(f, buf, len) GC_write((f), (buf), (len))
! 685: # endif
! 686: #endif
! 687:
! 688: /* A version of printf that is unlikely to call malloc, and is thus safer */
! 689: /* to call from the collector in case malloc has been bound to GC_malloc. */
! 690: /* Assumes that no more than 1023 characters are written at once. */
! 691: /* Assumes that all arguments have been converted to something of the */
! 692: /* same size as long, and that the format conversions expect something */
! 693: /* of that size. */
! 694: void GC_printf(format, a, b, c, d, e, f)
! 695: char * format;
! 696: long a, b, c, d, e, f;
! 697: {
! 698: char buf[1025];
! 699:
! 700: if (GC_quiet) return;
! 701: buf[1024] = 0x15;
! 702: (void) sprintf(buf, format, a, b, c, d, e, f);
! 703: if (buf[1024] != 0x15) ABORT("GC_printf clobbered stack");
! 704: if (WRITE(GC_stdout, buf, strlen(buf)) < 0) ABORT("write to stdout failed");
! 705: }
! 706:
! 707: void GC_err_printf(format, a, b, c, d, e, f)
! 708: char * format;
! 709: long a, b, c, d, e, f;
! 710: {
! 711: char buf[1025];
! 712:
! 713: buf[1024] = 0x15;
! 714: (void) sprintf(buf, format, a, b, c, d, e, f);
! 715: if (buf[1024] != 0x15) ABORT("GC_err_printf clobbered stack");
! 716: if (WRITE(GC_stderr, buf, strlen(buf)) < 0) ABORT("write to stderr failed");
! 717: }
! 718:
! 719: void GC_err_puts(s)
! 720: char *s;
! 721: {
! 722: if (WRITE(GC_stderr, s, strlen(s)) < 0) ABORT("write to stderr failed");
! 723: }
! 724:
! 725: # if defined(__STDC__) || defined(__cplusplus)
! 726: void GC_default_warn_proc(char *msg, GC_word arg)
! 727: # else
! 728: void GC_default_warn_proc(msg, arg)
! 729: char *msg;
! 730: GC_word arg;
! 731: # endif
! 732: {
! 733: GC_err_printf1(msg, (unsigned long)arg);
! 734: }
! 735:
! 736: GC_warn_proc GC_current_warn_proc = GC_default_warn_proc;
! 737:
! 738: # if defined(__STDC__) || defined(__cplusplus)
! 739: GC_warn_proc GC_set_warn_proc(GC_warn_proc p)
! 740: # else
! 741: GC_warn_proc GC_set_warn_proc(p)
! 742: GC_warn_proc p;
! 743: # endif
! 744: {
! 745: GC_warn_proc result;
! 746:
! 747: LOCK();
! 748: result = GC_current_warn_proc;
! 749: GC_current_warn_proc = p;
! 750: UNLOCK();
! 751: return(result);
! 752: }
! 753:
! 754:
! 755: #ifndef PCR
! 756: void GC_abort(msg)
! 757: char * msg;
! 758: {
! 759: GC_err_printf1("%s\n", msg);
! 760: (void) abort();
! 761: }
! 762: #endif
! 763:
! 764: #ifdef NEED_CALLINFO
! 765:
! 766: void GC_print_callers (info)
! 767: struct callinfo info[NFRAMES];
! 768: {
! 769: register int i;
! 770:
! 771: # if NFRAMES == 1
! 772: GC_err_printf0("\tCaller at allocation:\n");
! 773: # else
! 774: GC_err_printf0("\tCall chain at allocation:\n");
! 775: # endif
! 776: for (i = 0; i < NFRAMES; i++) {
! 777: if (info[i].ci_pc == 0) break;
! 778: # if NARGS > 0
! 779: {
! 780: int j;
! 781:
! 782: GC_err_printf0("\t\targs: ");
! 783: for (j = 0; j < NARGS; j++) {
! 784: if (j != 0) GC_err_printf0(", ");
! 785: GC_err_printf2("%d (0x%X)", ~(info[i].ci_arg[j]),
! 786: ~(info[i].ci_arg[j]));
! 787: }
! 788: GC_err_printf0("\n");
! 789: }
! 790: # endif
! 791: GC_err_printf1("\t\t##PC##= 0x%X\n", info[i].ci_pc);
! 792: }
! 793: }
! 794:
! 795: #endif /* SAVE_CALL_CHAIN */
! 796:
! 797: # ifdef SRC_M3
! 798: void GC_enable()
! 799: {
! 800: GC_dont_gc--;
! 801: }
! 802:
! 803: void GC_disable()
! 804: {
! 805: GC_dont_gc++;
! 806: }
! 807: # endif
! 808:
! 809: #if !defined(NO_DEBUGGING)
! 810:
! 811: void GC_dump()
! 812: {
! 813: GC_printf0("***Static roots:\n");
! 814: GC_print_static_roots();
! 815: GC_printf0("\n***Heap sections:\n");
! 816: GC_print_heap_sects();
! 817: GC_printf0("\n***Free blocks:\n");
! 818: GC_print_hblkfreelist();
! 819: GC_printf0("\n***Blocks in use:\n");
! 820: GC_print_block_list();
! 821: }
! 822:
! 823: # endif /* NO_DEBUGGING */
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