Annotation of OpenXM_contrib2/asir2000/gc5.3/misc.c, Revision 1.1.1.1
1.1 noro 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(IRIX_JDK_THREADS) \
46: || (defined(LINUX_THREADS) && defined(USE_SPIN_LOCK))
47: pthread_t GC_lock_holder = NO_THREAD;
48: # else
49: # if defined(HPUX_THREADS) \
50: || defined(LINUX_THREADS) && !defined(USE_SPIN_LOCK)
51: pthread_mutex_t GC_allocate_ml = PTHREAD_MUTEX_INITIALIZER;
52: # else
53: --> declare allocator lock here
54: # endif
55: # endif
56: # endif
57: # endif
58: # endif
59: # endif
60: # endif
61:
62: GC_FAR struct _GC_arrays GC_arrays /* = { 0 } */;
63:
64:
65: GC_bool GC_debugging_started = FALSE;
66: /* defined here so we don't have to load debug_malloc.o */
67:
68: void (*GC_check_heap)() = (void (*)())0;
69:
70: void (*GC_start_call_back)() = (void (*)())0;
71:
72: ptr_t GC_stackbottom = 0;
73:
74: GC_bool GC_dont_gc = 0;
75:
76: GC_bool GC_quiet = 0;
77:
78: #ifdef FIND_LEAK
79: int GC_find_leak = 1;
80: #else
81: int GC_find_leak = 0;
82: #endif
83:
84: /*ARGSUSED*/
85: GC_PTR GC_default_oom_fn GC_PROTO((size_t bytes_requested))
86: {
87: return(0);
88: }
89:
90: GC_PTR (*GC_oom_fn) GC_PROTO((size_t bytes_requested)) = GC_default_oom_fn;
91:
92: extern signed_word GC_mem_found;
93:
94: # ifdef MERGE_SIZES
95: /* Set things up so that GC_size_map[i] >= words(i), */
96: /* but not too much bigger */
97: /* and so that size_map contains relatively few distinct entries */
98: /* This is stolen from Russ Atkinson's Cedar quantization */
99: /* alogrithm (but we precompute it). */
100:
101:
102: void GC_init_size_map()
103: {
104: register unsigned i;
105:
106: /* Map size 0 to 1. This avoids problems at lower levels. */
107: GC_size_map[0] = 1;
108: /* One word objects don't have to be 2 word aligned. */
109: for (i = 1; i < sizeof(word); i++) {
110: GC_size_map[i] = 1;
111: }
112: GC_size_map[sizeof(word)] = ROUNDED_UP_WORDS(sizeof(word));
113: for (i = sizeof(word) + 1; i <= 8 * sizeof(word); i++) {
114: # ifdef ALIGN_DOUBLE
115: GC_size_map[i] = (ROUNDED_UP_WORDS(i) + 1) & (~1);
116: # else
117: GC_size_map[i] = ROUNDED_UP_WORDS(i);
118: # endif
119: }
120: for (i = 8*sizeof(word) + 1; i <= 16 * sizeof(word); i++) {
121: GC_size_map[i] = (ROUNDED_UP_WORDS(i) + 1) & (~1);
122: }
123: # ifdef GC_GCJ_SUPPORT
124: /* Make all sizes up to 32 words predictable, so that a */
125: /* compiler can statically perform the same computation, */
126: /* or at least a computation that results in similar size */
127: /* classes. */
128: for (i = 16*sizeof(word) + 1; i <= 32 * sizeof(word); i++) {
129: GC_size_map[i] = (ROUNDED_UP_WORDS(i) + 3) & (~3);
130: }
131: # endif
132: /* We leave the rest of the array to be filled in on demand. */
133: }
134:
135: /* Fill in additional entries in GC_size_map, including the ith one */
136: /* We assume the ith entry is currently 0. */
137: /* Note that a filled in section of the array ending at n always */
138: /* has length at least n/4. */
139: void GC_extend_size_map(i)
140: word i;
141: {
142: word orig_word_sz = ROUNDED_UP_WORDS(i);
143: word word_sz = orig_word_sz;
144: register word byte_sz = WORDS_TO_BYTES(word_sz);
145: /* The size we try to preserve. */
146: /* Close to to i, unless this would */
147: /* introduce too many distinct sizes. */
148: word smaller_than_i = byte_sz - (byte_sz >> 3);
149: word much_smaller_than_i = byte_sz - (byte_sz >> 2);
150: register word low_limit; /* The lowest indexed entry we */
151: /* initialize. */
152: register word j;
153:
154: if (GC_size_map[smaller_than_i] == 0) {
155: low_limit = much_smaller_than_i;
156: while (GC_size_map[low_limit] != 0) low_limit++;
157: } else {
158: low_limit = smaller_than_i + 1;
159: while (GC_size_map[low_limit] != 0) low_limit++;
160: word_sz = ROUNDED_UP_WORDS(low_limit);
161: word_sz += word_sz >> 3;
162: if (word_sz < orig_word_sz) word_sz = orig_word_sz;
163: }
164: # ifdef ALIGN_DOUBLE
165: word_sz += 1;
166: word_sz &= ~1;
167: # endif
168: if (word_sz > MAXOBJSZ) {
169: word_sz = MAXOBJSZ;
170: }
171: /* If we can fit the same number of larger objects in a block, */
172: /* do so. */
173: {
174: size_t number_of_objs = BODY_SZ/word_sz;
175: word_sz = BODY_SZ/number_of_objs;
176: # ifdef ALIGN_DOUBLE
177: word_sz &= ~1;
178: # endif
179: }
180: byte_sz = WORDS_TO_BYTES(word_sz);
181: # ifdef ADD_BYTE_AT_END
182: /* We need one extra byte; don't fill in GC_size_map[byte_sz] */
183: byte_sz--;
184: # endif
185:
186: for (j = low_limit; j <= byte_sz; j++) GC_size_map[j] = word_sz;
187: }
188: # endif
189:
190:
191: /*
192: * The following is a gross hack to deal with a problem that can occur
193: * on machines that are sloppy about stack frame sizes, notably SPARC.
194: * Bogus pointers may be written to the stack and not cleared for
195: * a LONG time, because they always fall into holes in stack frames
196: * that are not written. We partially address this by clearing
197: * sections of the stack whenever we get control.
198: */
199: word GC_stack_last_cleared = 0; /* GC_no when we last did this */
200: # ifdef THREADS
201: # define CLEAR_SIZE 2048
202: # else
203: # define CLEAR_SIZE 213
204: # endif
205: # define DEGRADE_RATE 50
206:
207: word GC_min_sp; /* Coolest stack pointer value from which we've */
208: /* already cleared the stack. */
209:
210: # ifdef STACK_GROWS_DOWN
211: # define COOLER_THAN >
212: # define HOTTER_THAN <
213: # define MAKE_COOLER(x,y) if ((word)(x)+(y) > (word)(x)) {(x) += (y);} \
214: else {(x) = (word)ONES;}
215: # define MAKE_HOTTER(x,y) (x) -= (y)
216: # else
217: # define COOLER_THAN <
218: # define HOTTER_THAN >
219: # define MAKE_COOLER(x,y) if ((word)(x)-(y) < (word)(x)) {(x) -= (y);} else {(x) = 0;}
220: # define MAKE_HOTTER(x,y) (x) += (y)
221: # endif
222:
223: word GC_high_water;
224: /* "hottest" stack pointer value we have seen */
225: /* recently. Degrades over time. */
226:
227: word GC_words_allocd_at_reset;
228:
229: #if defined(ASM_CLEAR_CODE) && !defined(THREADS)
230: extern ptr_t GC_clear_stack_inner();
231: #endif
232:
233: #if !defined(ASM_CLEAR_CODE) && !defined(THREADS)
234: /* Clear the stack up to about limit. Return arg. */
235: /*ARGSUSED*/
236: ptr_t GC_clear_stack_inner(arg, limit)
237: ptr_t arg;
238: word limit;
239: {
240: word dummy[CLEAR_SIZE];
241:
242: BZERO(dummy, CLEAR_SIZE*sizeof(word));
243: if ((word)(dummy) COOLER_THAN limit) {
244: (void) GC_clear_stack_inner(arg, limit);
245: }
246: /* Make sure the recursive call is not a tail call, and the bzero */
247: /* call is not recognized as dead code. */
248: GC_noop1((word)dummy);
249: return(arg);
250: }
251: #endif
252:
253: /* Clear some of the inaccessible part of the stack. Returns its */
254: /* argument, so it can be used in a tail call position, hence clearing */
255: /* another frame. */
256: ptr_t GC_clear_stack(arg)
257: ptr_t arg;
258: {
259: register word sp = (word)GC_approx_sp(); /* Hotter than actual sp */
260: # ifdef THREADS
261: word dummy[CLEAR_SIZE];
262: # else
263: register word limit;
264: # endif
265:
266: # define SLOP 400
267: /* Extra bytes we clear every time. This clears our own */
268: /* activation record, and should cause more frequent */
269: /* clearing near the cold end of the stack, a good thing. */
270: # define GC_SLOP 4000
271: /* We make GC_high_water this much hotter than we really saw */
272: /* saw it, to cover for GC noise etc. above our current frame. */
273: # define CLEAR_THRESHOLD 100000
274: /* We restart the clearing process after this many bytes of */
275: /* allocation. Otherwise very heavily recursive programs */
276: /* with sparse stacks may result in heaps that grow almost */
277: /* without bounds. As the heap gets larger, collection */
278: /* frequency decreases, thus clearing frequency would decrease, */
279: /* thus more junk remains accessible, thus the heap gets */
280: /* larger ... */
281: # ifdef THREADS
282: BZERO(dummy, CLEAR_SIZE*sizeof(word));
283: # else
284: if (GC_gc_no > GC_stack_last_cleared) {
285: /* Start things over, so we clear the entire stack again */
286: if (GC_stack_last_cleared == 0) GC_high_water = (word) GC_stackbottom;
287: GC_min_sp = GC_high_water;
288: GC_stack_last_cleared = GC_gc_no;
289: GC_words_allocd_at_reset = GC_words_allocd;
290: }
291: /* Adjust GC_high_water */
292: MAKE_COOLER(GC_high_water, WORDS_TO_BYTES(DEGRADE_RATE) + GC_SLOP);
293: if (sp HOTTER_THAN GC_high_water) {
294: GC_high_water = sp;
295: }
296: MAKE_HOTTER(GC_high_water, GC_SLOP);
297: limit = GC_min_sp;
298: MAKE_HOTTER(limit, SLOP);
299: if (sp COOLER_THAN limit) {
300: limit &= ~0xf; /* Make it sufficiently aligned for assembly */
301: /* implementations of GC_clear_stack_inner. */
302: GC_min_sp = sp;
303: return(GC_clear_stack_inner(arg, limit));
304: } else if (WORDS_TO_BYTES(GC_words_allocd - GC_words_allocd_at_reset)
305: > CLEAR_THRESHOLD) {
306: /* Restart clearing process, but limit how much clearing we do. */
307: GC_min_sp = sp;
308: MAKE_HOTTER(GC_min_sp, CLEAR_THRESHOLD/4);
309: if (GC_min_sp HOTTER_THAN GC_high_water) GC_min_sp = GC_high_water;
310: GC_words_allocd_at_reset = GC_words_allocd;
311: }
312: # endif
313: return(arg);
314: }
315:
316:
317: /* Return a pointer to the base address of p, given a pointer to a */
318: /* an address within an object. Return 0 o.w. */
319: # ifdef __STDC__
320: GC_PTR GC_base(GC_PTR p)
321: # else
322: GC_PTR GC_base(p)
323: GC_PTR p;
324: # endif
325: {
326: register word r;
327: register struct hblk *h;
328: register bottom_index *bi;
329: register hdr *candidate_hdr;
330: register word limit;
331:
332: r = (word)p;
333: if (!GC_is_initialized) return 0;
334: h = HBLKPTR(r);
335: GET_BI(r, bi);
336: candidate_hdr = HDR_FROM_BI(bi, r);
337: if (candidate_hdr == 0) return(0);
338: /* If it's a pointer to the middle of a large object, move it */
339: /* to the beginning. */
340: while (IS_FORWARDING_ADDR_OR_NIL(candidate_hdr)) {
341: h = FORWARDED_ADDR(h,candidate_hdr);
342: r = (word)h + HDR_BYTES;
343: candidate_hdr = HDR(h);
344: }
345: if (candidate_hdr -> hb_map == GC_invalid_map) return(0);
346: /* Make sure r points to the beginning of the object */
347: r &= ~(WORDS_TO_BYTES(1) - 1);
348: {
349: register int offset = (char *)r - (char *)(HBLKPTR(r));
350: register signed_word sz = candidate_hdr -> hb_sz;
351:
352: # ifdef ALL_INTERIOR_POINTERS
353: register map_entry_type map_entry;
354:
355: map_entry = MAP_ENTRY((candidate_hdr -> hb_map), offset);
356: if (map_entry == OBJ_INVALID) {
357: return(0);
358: }
359: r -= WORDS_TO_BYTES(map_entry);
360: limit = r + WORDS_TO_BYTES(sz);
361: # else
362: register int correction;
363:
364: offset = BYTES_TO_WORDS(offset - HDR_BYTES);
365: correction = offset % sz;
366: r -= (WORDS_TO_BYTES(correction));
367: limit = r + WORDS_TO_BYTES(sz);
368: if (limit > (word)(h + 1)
369: && sz <= BYTES_TO_WORDS(HBLKSIZE) - HDR_WORDS) {
370: return(0);
371: }
372: # endif
373: if ((word)p >= limit) return(0);
374: }
375: return((GC_PTR)r);
376: }
377:
378:
379: /* Return the size of an object, given a pointer to its base. */
380: /* (For small obects this also happens to work from interior pointers, */
381: /* but that shouldn't be relied upon.) */
382: # ifdef __STDC__
383: size_t GC_size(GC_PTR p)
384: # else
385: size_t GC_size(p)
386: GC_PTR p;
387: # endif
388: {
389: register int sz;
390: register hdr * hhdr = HDR(p);
391:
392: sz = WORDS_TO_BYTES(hhdr -> hb_sz);
393: if (sz < 0) {
394: return(-sz);
395: } else {
396: return(sz);
397: }
398: }
399:
400: size_t GC_get_heap_size GC_PROTO(())
401: {
402: return ((size_t) GC_heapsize);
403: }
404:
405: size_t GC_get_free_bytes GC_PROTO(())
406: {
407: return ((size_t) GC_large_free_bytes);
408: }
409:
410: size_t GC_get_bytes_since_gc GC_PROTO(())
411: {
412: return ((size_t) WORDS_TO_BYTES(GC_words_allocd));
413: }
414:
415: GC_bool GC_is_initialized = FALSE;
416:
417: void GC_init()
418: {
419: DCL_LOCK_STATE;
420:
421: DISABLE_SIGNALS();
422: LOCK();
423: GC_init_inner();
424: UNLOCK();
425: ENABLE_SIGNALS();
426:
427: }
428:
429: #ifdef MSWIN32
430: extern void GC_init_win32();
431: #endif
432:
433: extern void GC_setpagesize();
434:
435: void GC_init_inner()
436: {
437: # ifndef THREADS
438: word dummy;
439: # endif
440:
441: if (GC_is_initialized) return;
442: GC_setpagesize();
443: GC_exclude_static_roots(beginGC_arrays, end_gc_area);
444: # ifdef PRINTSTATS
445: if ((ptr_t)endGC_arrays != (ptr_t)(&GC_obj_kinds)) {
446: GC_printf0("Reordering linker, didn't exclude obj_kinds\n");
447: }
448: # endif
449: # ifdef MSWIN32
450: GC_init_win32();
451: # endif
452: # if defined(SEARCH_FOR_DATA_START)
453: /* This doesn't really work if the collector is in a shared library. */
454: GC_init_linux_data_start();
455: # endif
456: # ifdef SOLARIS_THREADS
457: GC_thr_init();
458: /* We need dirty bits in order to find live stack sections. */
459: GC_dirty_init();
460: # endif
461: # if defined(IRIX_THREADS) || defined(LINUX_THREADS) \
462: || defined(IRIX_JDK_THREADS) || defined(HPUX_THREADS)
463: GC_thr_init();
464: # endif
465: # if !defined(THREADS) || defined(SOLARIS_THREADS) || defined(WIN32_THREADS) \
466: || defined(IRIX_THREADS) || defined(LINUX_THREADS) \
467: || defined(HPUX_THREADS)
468: if (GC_stackbottom == 0) {
469: GC_stackbottom = GC_get_stack_base();
470: }
471: # endif
472: if (sizeof (ptr_t) != sizeof(word)) {
473: ABORT("sizeof (ptr_t) != sizeof(word)\n");
474: }
475: if (sizeof (signed_word) != sizeof(word)) {
476: ABORT("sizeof (signed_word) != sizeof(word)\n");
477: }
478: if (sizeof (struct hblk) != HBLKSIZE) {
479: ABORT("sizeof (struct hblk) != HBLKSIZE\n");
480: }
481: # ifndef THREADS
482: # if defined(STACK_GROWS_UP) && defined(STACK_GROWS_DOWN)
483: ABORT(
484: "Only one of STACK_GROWS_UP and STACK_GROWS_DOWN should be defd\n");
485: # endif
486: # if !defined(STACK_GROWS_UP) && !defined(STACK_GROWS_DOWN)
487: ABORT(
488: "One of STACK_GROWS_UP and STACK_GROWS_DOWN should be defd\n");
489: # endif
490: # ifdef STACK_GROWS_DOWN
491: if ((word)(&dummy) > (word)GC_stackbottom) {
492: GC_err_printf0(
493: "STACK_GROWS_DOWN is defd, but stack appears to grow up\n");
494: # ifndef UTS4 /* Compiler bug workaround */
495: GC_err_printf2("sp = 0x%lx, GC_stackbottom = 0x%lx\n",
496: (unsigned long) (&dummy),
497: (unsigned long) GC_stackbottom);
498: # endif
499: ABORT("stack direction 3\n");
500: }
501: # else
502: if ((word)(&dummy) < (word)GC_stackbottom) {
503: GC_err_printf0(
504: "STACK_GROWS_UP is defd, but stack appears to grow down\n");
505: GC_err_printf2("sp = 0x%lx, GC_stackbottom = 0x%lx\n",
506: (unsigned long) (&dummy),
507: (unsigned long) GC_stackbottom);
508: ABORT("stack direction 4");
509: }
510: # endif
511: # endif
512: # if !defined(_AUX_SOURCE) || defined(__GNUC__)
513: if ((word)(-1) < (word)0) {
514: GC_err_printf0("The type word should be an unsigned integer type\n");
515: GC_err_printf0("It appears to be signed\n");
516: ABORT("word");
517: }
518: # endif
519: if ((signed_word)(-1) >= (signed_word)0) {
520: GC_err_printf0(
521: "The type signed_word should be a signed integer type\n");
522: GC_err_printf0("It appears to be unsigned\n");
523: ABORT("signed_word");
524: }
525:
526: /* Add initial guess of root sets. Do this first, since sbrk(0) */
527: /* might be used. */
528: GC_register_data_segments();
529: GC_init_headers();
530: GC_bl_init();
531: GC_mark_init();
532: if (!GC_expand_hp_inner((word)MINHINCR)) {
533: GC_err_printf0("Can't start up: not enough memory\n");
534: EXIT();
535: }
536: /* Preallocate large object map. It's otherwise inconvenient to */
537: /* deal with failure. */
538: if (!GC_add_map_entry((word)0)) {
539: GC_err_printf0("Can't start up: not enough memory\n");
540: EXIT();
541: }
542: GC_register_displacement_inner(0L);
543: # ifdef MERGE_SIZES
544: GC_init_size_map();
545: # endif
546: # ifdef PCR
547: if (PCR_IL_Lock(PCR_Bool_false, PCR_allSigsBlocked, PCR_waitForever)
548: != PCR_ERes_okay) {
549: ABORT("Can't lock load state\n");
550: } else if (PCR_IL_Unlock() != PCR_ERes_okay) {
551: ABORT("Can't unlock load state\n");
552: }
553: PCR_IL_Unlock();
554: GC_pcr_install();
555: # endif
556: /* Get black list set up */
557: GC_gcollect_inner();
558: # ifdef STUBBORN_ALLOC
559: GC_stubborn_init();
560: # endif
561: GC_is_initialized = TRUE;
562: /* Convince lint that some things are used */
563: # ifdef LINT
564: {
565: extern char * GC_copyright[];
566: extern int GC_read();
567: extern void GC_register_finalizer_no_order();
568:
569: GC_noop(GC_copyright, GC_find_header,
570: GC_push_one, GC_call_with_alloc_lock, GC_read,
571: GC_dont_expand,
572: # ifndef NO_DEBUGGING
573: GC_dump,
574: # endif
575: GC_register_finalizer_no_order);
576: }
577: # endif
578: }
579:
580: void GC_enable_incremental GC_PROTO(())
581: {
582: # if !defined(SMALL_CONFIG)
583: if (!GC_find_leak) {
584: DCL_LOCK_STATE;
585:
586: DISABLE_SIGNALS();
587: LOCK();
588: if (GC_incremental) goto out;
589: GC_setpagesize();
590: # ifdef MSWIN32
591: {
592: extern GC_bool GC_is_win32s();
593:
594: /* VirtualProtect is not functional under win32s. */
595: if (GC_is_win32s()) goto out;
596: }
597: # endif /* MSWIN32 */
598: # ifndef SOLARIS_THREADS
599: GC_dirty_init();
600: # endif
601: if (!GC_is_initialized) {
602: GC_init_inner();
603: }
604: if (GC_dont_gc) {
605: /* Can't easily do it. */
606: UNLOCK();
607: ENABLE_SIGNALS();
608: return;
609: }
610: if (GC_words_allocd > 0) {
611: /* There may be unmarked reachable objects */
612: GC_gcollect_inner();
613: } /* else we're OK in assuming everything's */
614: /* clean since nothing can point to an */
615: /* unmarked object. */
616: GC_read_dirty();
617: GC_incremental = TRUE;
618: out:
619: UNLOCK();
620: ENABLE_SIGNALS();
621: }
622: # endif
623: }
624:
625:
626: #ifdef MSWIN32
627: # define LOG_FILE "gc.log"
628:
629: HANDLE GC_stdout = 0, GC_stderr;
630: int GC_tmp;
631: DWORD GC_junk;
632:
633: void GC_set_files()
634: {
635: if (!GC_stdout) {
636: GC_stdout = CreateFile(LOG_FILE, GENERIC_WRITE,
637: FILE_SHARE_READ | FILE_SHARE_WRITE,
638: NULL, CREATE_ALWAYS, FILE_FLAG_WRITE_THROUGH,
639: NULL);
640: if (INVALID_HANDLE_VALUE == GC_stdout) ABORT("Open of log file failed");
641: }
642: if (GC_stderr == 0) {
643: GC_stderr = GC_stdout;
644: }
645: }
646:
647: #endif
648:
649: #if defined(OS2) || defined(MACOS)
650: FILE * GC_stdout = NULL;
651: FILE * GC_stderr = NULL;
652: int GC_tmp; /* Should really be local ... */
653:
654: void GC_set_files()
655: {
656: if (GC_stdout == NULL) {
657: GC_stdout = stdout;
658: }
659: if (GC_stderr == NULL) {
660: GC_stderr = stderr;
661: }
662: }
663: #endif
664:
665: #if !defined(OS2) && !defined(MACOS) && !defined(MSWIN32)
666: int GC_stdout = 1;
667: int GC_stderr = 2;
668: # if !defined(AMIGA)
669: # include <unistd.h>
670: # endif
671: #endif
672:
673: #if !defined(MSWIN32) && !defined(OS2) && !defined(MACOS)
674: int GC_write(fd, buf, len)
675: int fd;
676: char *buf;
677: size_t len;
678: {
679: register int bytes_written = 0;
680: register int result;
681:
682: while (bytes_written < len) {
683: # ifdef SOLARIS_THREADS
684: result = syscall(SYS_write, fd, buf + bytes_written,
685: len - bytes_written);
686: # else
687: result = write(fd, buf + bytes_written, len - bytes_written);
688: # endif
689: if (-1 == result) return(result);
690: bytes_written += result;
691: }
692: return(bytes_written);
693: }
694: #endif /* UN*X */
695:
696: #ifdef MSWIN32
697: # define WRITE(f, buf, len) (GC_set_files(), \
698: GC_tmp = WriteFile((f), (buf), \
699: (len), &GC_junk, NULL),\
700: (GC_tmp? 1 : -1))
701: #else
702: # if defined(OS2) || defined(MACOS)
703: # define WRITE(f, buf, len) (GC_set_files(), \
704: GC_tmp = fwrite((buf), 1, (len), (f)), \
705: fflush(f), GC_tmp)
706: # else
707: # define WRITE(f, buf, len) GC_write((f), (buf), (len))
708: # endif
709: #endif
710:
711: /* A version of printf that is unlikely to call malloc, and is thus safer */
712: /* to call from the collector in case malloc has been bound to GC_malloc. */
713: /* Assumes that no more than 1023 characters are written at once. */
714: /* Assumes that all arguments have been converted to something of the */
715: /* same size as long, and that the format conversions expect something */
716: /* of that size. */
717: void GC_printf(format, a, b, c, d, e, f)
718: char * format;
719: long a, b, c, d, e, f;
720: {
721: char buf[1025];
722:
723: if (GC_quiet) return;
724: buf[1024] = 0x15;
725: (void) sprintf(buf, format, a, b, c, d, e, f);
726: if (buf[1024] != 0x15) ABORT("GC_printf clobbered stack");
727: if (WRITE(GC_stdout, buf, strlen(buf)) < 0) ABORT("write to stdout failed");
728: }
729:
730: void GC_err_printf(format, a, b, c, d, e, f)
731: char * format;
732: long a, b, c, d, e, f;
733: {
734: char buf[1025];
735:
736: buf[1024] = 0x15;
737: (void) sprintf(buf, format, a, b, c, d, e, f);
738: if (buf[1024] != 0x15) ABORT("GC_err_printf clobbered stack");
739: if (WRITE(GC_stderr, buf, strlen(buf)) < 0) ABORT("write to stderr failed");
740: }
741:
742: void GC_err_puts(s)
743: char *s;
744: {
745: if (WRITE(GC_stderr, s, strlen(s)) < 0) ABORT("write to stderr failed");
746: }
747:
748: # if defined(__STDC__) || defined(__cplusplus)
749: void GC_default_warn_proc(char *msg, GC_word arg)
750: # else
751: void GC_default_warn_proc(msg, arg)
752: char *msg;
753: GC_word arg;
754: # endif
755: {
756: GC_err_printf1(msg, (unsigned long)arg);
757: }
758:
759: GC_warn_proc GC_current_warn_proc = GC_default_warn_proc;
760:
761: # if defined(__STDC__) || defined(__cplusplus)
762: GC_warn_proc GC_set_warn_proc(GC_warn_proc p)
763: # else
764: GC_warn_proc GC_set_warn_proc(p)
765: GC_warn_proc p;
766: # endif
767: {
768: GC_warn_proc result;
769:
770: LOCK();
771: result = GC_current_warn_proc;
772: GC_current_warn_proc = p;
773: UNLOCK();
774: return(result);
775: }
776:
777:
778: #ifndef PCR
779: void GC_abort(msg)
780: char * msg;
781: {
782: GC_err_printf1("%s\n", msg);
783: (void) abort();
784: }
785: #endif
786:
787: #ifdef NEED_CALLINFO
788:
789: void GC_print_callers (info)
790: struct callinfo info[NFRAMES];
791: {
792: register int i;
793:
794: # if NFRAMES == 1
795: GC_err_printf0("\tCaller at allocation:\n");
796: # else
797: GC_err_printf0("\tCall chain at allocation:\n");
798: # endif
799: for (i = 0; i < NFRAMES; i++) {
800: if (info[i].ci_pc == 0) break;
801: # if NARGS > 0
802: {
803: int j;
804:
805: GC_err_printf0("\t\targs: ");
806: for (j = 0; j < NARGS; j++) {
807: if (j != 0) GC_err_printf0(", ");
808: GC_err_printf2("%d (0x%X)", ~(info[i].ci_arg[j]),
809: ~(info[i].ci_arg[j]));
810: }
811: GC_err_printf0("\n");
812: }
813: # endif
814: GC_err_printf1("\t\t##PC##= 0x%X\n", info[i].ci_pc);
815: }
816: }
817:
818: #endif /* SAVE_CALL_CHAIN */
819:
820: /* Needed by SRC_M3, gcj, and should perhaps be the official interface */
821: /* to GC_dont_gc. */
822: void GC_enable()
823: {
824: GC_dont_gc--;
825: }
826:
827: void GC_disable()
828: {
829: GC_dont_gc++;
830: }
831:
832: #if !defined(NO_DEBUGGING)
833:
834: void GC_dump()
835: {
836: GC_printf0("***Static roots:\n");
837: GC_print_static_roots();
838: GC_printf0("\n***Heap sections:\n");
839: GC_print_heap_sects();
840: GC_printf0("\n***Free blocks:\n");
841: GC_print_hblkfreelist();
842: GC_printf0("\n***Blocks in use:\n");
843: GC_print_block_list();
844: }
845:
846: # endif /* NO_DEBUGGING */
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