Line data Source code
1 : /*
2 : * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
3 : * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
4 : * Copyright (c) 1999-2001 by Hewlett-Packard Company. All rights reserved.
5 : *
6 : * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
7 : * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
8 : *
9 : * Permission is hereby granted to use or copy this program
10 : * for any purpose, provided the above notices are retained on all copies.
11 : * Permission to modify the code and to distribute modified code is granted,
12 : * provided the above notices are retained, and a notice that the code was
13 : * modified is included with the above copyright notice.
14 : */
15 :
16 : #include "private/gc_pmark.h"
17 :
18 : #include <stdio.h>
19 : #include <limits.h>
20 : #include <stdarg.h>
21 :
22 : #ifndef MSWINCE
23 : # include <signal.h>
24 : #endif
25 :
26 : #ifdef GC_SOLARIS_THREADS
27 : # include <sys/syscall.h>
28 : #endif
29 :
30 : #if defined(MSWIN32) || defined(MSWINCE) \
31 : || (defined(CYGWIN32) && defined(GC_READ_ENV_FILE))
32 : # ifndef WIN32_LEAN_AND_MEAN
33 : # define WIN32_LEAN_AND_MEAN 1
34 : # endif
35 : # define NOSERVICE
36 : # include <windows.h>
37 : #endif
38 :
39 : #if defined(UNIX_LIKE) || defined(CYGWIN32) || defined(SYMBIAN)
40 : # include <fcntl.h>
41 : # include <sys/types.h>
42 : # include <sys/stat.h>
43 : #endif
44 :
45 : #ifdef NONSTOP
46 : # include <floss.h>
47 : #endif
48 :
49 : #ifdef THREADS
50 : # ifdef PCR
51 : # include "il/PCR_IL.h"
52 : GC_INNER PCR_Th_ML GC_allocate_ml;
53 : # elif defined(SN_TARGET_PS3)
54 : # include <pthread.h>
55 : GC_INNER pthread_mutex_t GC_allocate_ml;
56 : # endif
57 : /* For other platforms with threads, the lock and possibly */
58 : /* GC_lock_holder variables are defined in the thread support code. */
59 : #endif /* THREADS */
60 :
61 : #ifdef DYNAMIC_LOADING
62 : /* We need to register the main data segment. Returns TRUE unless */
63 : /* this is done implicitly as part of dynamic library registration. */
64 : # define GC_REGISTER_MAIN_STATIC_DATA() GC_register_main_static_data()
65 : #elif defined(GC_DONT_REGISTER_MAIN_STATIC_DATA)
66 : # define GC_REGISTER_MAIN_STATIC_DATA() FALSE
67 : #else
68 : /* Don't unnecessarily call GC_register_main_static_data() in case */
69 : /* dyn_load.c isn't linked in. */
70 : # define GC_REGISTER_MAIN_STATIC_DATA() TRUE
71 : #endif
72 :
73 : #ifdef NEED_CANCEL_DISABLE_COUNT
74 : __thread unsigned char GC_cancel_disable_count = 0;
75 : #endif
76 :
77 : GC_FAR struct _GC_arrays GC_arrays /* = { 0 } */;
78 :
79 : GC_INNER GC_bool GC_debugging_started = FALSE;
80 : /* defined here so we don't have to load debug_malloc.o */
81 :
82 : ptr_t GC_stackbottom = 0;
83 :
84 : #ifdef IA64
85 : ptr_t GC_register_stackbottom = 0;
86 : #endif
87 :
88 : int GC_dont_gc = FALSE;
89 :
90 : int GC_dont_precollect = FALSE;
91 :
92 : GC_bool GC_quiet = 0; /* used also in pcr_interface.c */
93 :
94 : #ifndef SMALL_CONFIG
95 : int GC_print_stats = 0;
96 : #endif
97 :
98 : #ifdef GC_PRINT_BACK_HEIGHT
99 : GC_INNER GC_bool GC_print_back_height = TRUE;
100 : #else
101 : GC_INNER GC_bool GC_print_back_height = FALSE;
102 : #endif
103 :
104 : #ifndef NO_DEBUGGING
105 : GC_INNER GC_bool GC_dump_regularly = FALSE;
106 : /* Generate regular debugging dumps. */
107 : #endif
108 :
109 : #ifdef KEEP_BACK_PTRS
110 : GC_INNER long GC_backtraces = 0;
111 : /* Number of random backtraces to generate for each GC. */
112 : #endif
113 :
114 : #ifdef FIND_LEAK
115 : int GC_find_leak = 1;
116 : #else
117 : int GC_find_leak = 0;
118 : #endif
119 :
120 : #ifndef SHORT_DBG_HDRS
121 : # ifdef GC_FINDLEAK_DELAY_FREE
122 : GC_INNER GC_bool GC_findleak_delay_free = TRUE;
123 : # else
124 : GC_INNER GC_bool GC_findleak_delay_free = FALSE;
125 : # endif
126 : #endif /* !SHORT_DBG_HDRS */
127 :
128 : #ifdef ALL_INTERIOR_POINTERS
129 : int GC_all_interior_pointers = 1;
130 : #else
131 : int GC_all_interior_pointers = 0;
132 : #endif
133 :
134 : #ifdef FINALIZE_ON_DEMAND
135 : int GC_finalize_on_demand = 1;
136 : #else
137 : int GC_finalize_on_demand = 0;
138 : #endif
139 :
140 : #ifdef JAVA_FINALIZATION
141 : int GC_java_finalization = 1;
142 : #else
143 : int GC_java_finalization = 0;
144 : #endif
145 :
146 : /* All accesses to it should be synchronized to avoid data races. */
147 : GC_finalizer_notifier_proc GC_finalizer_notifier =
148 : (GC_finalizer_notifier_proc)0;
149 :
150 : #ifdef GC_FORCE_UNMAP_ON_GCOLLECT
151 : /* Has no effect unless USE_MUNMAP. */
152 : /* Has no effect on implicitly-initiated garbage collections. */
153 : GC_INNER GC_bool GC_force_unmap_on_gcollect = TRUE;
154 : #else
155 : GC_INNER GC_bool GC_force_unmap_on_gcollect = FALSE;
156 : #endif
157 :
158 : #ifndef GC_LARGE_ALLOC_WARN_INTERVAL
159 : # define GC_LARGE_ALLOC_WARN_INTERVAL 5
160 : #endif
161 : GC_INNER long GC_large_alloc_warn_interval = GC_LARGE_ALLOC_WARN_INTERVAL;
162 : /* Interval between unsuppressed warnings. */
163 :
164 0 : STATIC void * GC_CALLBACK GC_default_oom_fn(
165 : size_t bytes_requested GC_ATTR_UNUSED)
166 : {
167 0 : return(0);
168 : }
169 :
170 : /* All accesses to it should be synchronized to avoid data races. */
171 : GC_oom_func GC_oom_fn = GC_default_oom_fn;
172 :
173 : #ifdef CAN_HANDLE_FORK
174 : # ifdef HANDLE_FORK
175 : GC_INNER int GC_handle_fork = 1;
176 : /* The value is examined by GC_thr_init. */
177 : # else
178 : GC_INNER int GC_handle_fork = FALSE;
179 : # endif
180 :
181 : #elif !defined(HAVE_NO_FORK)
182 :
183 : /* Same as above but with GC_CALL calling conventions. */
184 : GC_API void GC_CALL GC_atfork_prepare(void)
185 : {
186 : # ifdef THREADS
187 : ABORT("fork() handling unsupported");
188 : # endif
189 : }
190 :
191 : GC_API void GC_CALL GC_atfork_parent(void)
192 : {
193 : /* empty */
194 : }
195 :
196 : GC_API void GC_CALL GC_atfork_child(void)
197 : {
198 : /* empty */
199 : }
200 : #endif /* !CAN_HANDLE_FORK && !HAVE_NO_FORK */
201 :
202 : /* Overrides the default automatic handle-fork mode. Has effect only */
203 : /* if called before GC_INIT. */
204 0 : GC_API void GC_CALL GC_set_handle_fork(int value GC_ATTR_UNUSED)
205 : {
206 : # ifdef CAN_HANDLE_FORK
207 0 : if (!GC_is_initialized)
208 0 : GC_handle_fork = value >= -1 ? value : 1;
209 : /* Map all negative values except for -1 to a positive one. */
210 : # elif defined(THREADS) || (defined(DARWIN) && defined(MPROTECT_VDB))
211 : if (!GC_is_initialized && value) {
212 : # ifndef SMALL_CONFIG
213 : GC_init(); /* just to initialize GC_stderr */
214 : # endif
215 : ABORT("fork() handling unsupported");
216 : }
217 : # else
218 : /* No at-fork handler is needed in the single-threaded mode. */
219 : # endif
220 0 : }
221 :
222 : /* Set things up so that GC_size_map[i] >= granules(i), */
223 : /* but not too much bigger */
224 : /* and so that size_map contains relatively few distinct entries */
225 : /* This was originally stolen from Russ Atkinson's Cedar */
226 : /* quantization algorithm (but we precompute it). */
227 163 : STATIC void GC_init_size_map(void)
228 : {
229 : int i;
230 :
231 : /* Map size 0 to something bigger. */
232 : /* This avoids problems at lower levels. */
233 163 : GC_size_map[0] = 1;
234 62755 : for (i = 1; i <= GRANULES_TO_BYTES(TINY_FREELISTS-1) - EXTRA_BYTES; i++) {
235 62592 : GC_size_map[i] = ROUNDED_UP_GRANULES(i);
236 : # ifndef _MSC_VER
237 : GC_ASSERT(GC_size_map[i] < TINY_FREELISTS);
238 : /* Seems to tickle bug in VC++ 2008 for AMD64 */
239 : # endif
240 : }
241 : /* We leave the rest of the array to be filled in on demand. */
242 163 : }
243 :
244 : /* Fill in additional entries in GC_size_map, including the ith one */
245 : /* We assume the ith entry is currently 0. */
246 : /* Note that a filled in section of the array ending at n always */
247 : /* has length at least n/4. */
248 642 : GC_INNER void GC_extend_size_map(size_t i)
249 : {
250 642 : size_t orig_granule_sz = ROUNDED_UP_GRANULES(i);
251 642 : size_t granule_sz = orig_granule_sz;
252 642 : size_t byte_sz = GRANULES_TO_BYTES(granule_sz);
253 : /* The size we try to preserve. */
254 : /* Close to i, unless this would */
255 : /* introduce too many distinct sizes. */
256 642 : size_t smaller_than_i = byte_sz - (byte_sz >> 3);
257 642 : size_t much_smaller_than_i = byte_sz - (byte_sz >> 2);
258 : size_t low_limit; /* The lowest indexed entry we */
259 : /* initialize. */
260 : size_t j;
261 :
262 642 : if (GC_size_map[smaller_than_i] == 0) {
263 311 : low_limit = much_smaller_than_i;
264 311 : while (GC_size_map[low_limit] != 0) low_limit++;
265 : } else {
266 331 : low_limit = smaller_than_i + 1;
267 331 : while (GC_size_map[low_limit] != 0) low_limit++;
268 331 : granule_sz = ROUNDED_UP_GRANULES(low_limit);
269 331 : granule_sz += granule_sz >> 3;
270 331 : if (granule_sz < orig_granule_sz) granule_sz = orig_granule_sz;
271 : }
272 : /* For these larger sizes, we use an even number of granules. */
273 : /* This makes it easier to, for example, construct a 16byte-aligned */
274 : /* allocator even if GRANULE_BYTES is 8. */
275 642 : granule_sz += 1;
276 642 : granule_sz &= ~1;
277 642 : if (granule_sz > MAXOBJGRANULES) {
278 0 : granule_sz = MAXOBJGRANULES;
279 : }
280 : /* If we can fit the same number of larger objects in a block, */
281 : /* do so. */
282 : {
283 642 : size_t number_of_objs = HBLK_GRANULES/granule_sz;
284 : GC_ASSERT(number_of_objs != 0);
285 642 : granule_sz = HBLK_GRANULES/number_of_objs;
286 642 : granule_sz &= ~1;
287 : }
288 642 : byte_sz = GRANULES_TO_BYTES(granule_sz);
289 : /* We may need one extra byte; */
290 : /* don't always fill in GC_size_map[byte_sz] */
291 642 : byte_sz -= EXTRA_BYTES;
292 :
293 642 : for (j = low_limit; j <= byte_sz; j++) GC_size_map[j] = granule_sz;
294 642 : }
295 :
296 :
297 : /*
298 : * The following is a gross hack to deal with a problem that can occur
299 : * on machines that are sloppy about stack frame sizes, notably SPARC.
300 : * Bogus pointers may be written to the stack and not cleared for
301 : * a LONG time, because they always fall into holes in stack frames
302 : * that are not written. We partially address this by clearing
303 : * sections of the stack whenever we get control.
304 : */
305 : # ifdef THREADS
306 : # define BIG_CLEAR_SIZE 2048 /* Clear this much now and then. */
307 : # define SMALL_CLEAR_SIZE 256 /* Clear this much every time. */
308 : # else
309 : STATIC word GC_stack_last_cleared = 0; /* GC_no when we last did this */
310 : STATIC ptr_t GC_min_sp = NULL;
311 : /* Coolest stack pointer value from which */
312 : /* we've already cleared the stack. */
313 : STATIC ptr_t GC_high_water = NULL;
314 : /* "hottest" stack pointer value we have seen */
315 : /* recently. Degrades over time. */
316 : STATIC word GC_bytes_allocd_at_reset = 0;
317 : # define DEGRADE_RATE 50
318 : # endif
319 :
320 : # define CLEAR_SIZE 213 /* Granularity for GC_clear_stack_inner */
321 :
322 : #if defined(ASM_CLEAR_CODE)
323 : void *GC_clear_stack_inner(void *, ptr_t);
324 : #else
325 : /* Clear the stack up to about limit. Return arg. This function is */
326 : /* not static because it could also be erroneously defined in .S */
327 : /* file, so this error would be caught by the linker. */
328 41260 : void * GC_clear_stack_inner(void *arg, ptr_t limit)
329 : {
330 : volatile word dummy[CLEAR_SIZE];
331 :
332 41260 : BZERO((/* no volatile */ void *)dummy, sizeof(dummy));
333 41260 : if ((word)GC_approx_sp() COOLER_THAN (word)limit) {
334 37134 : (void) GC_clear_stack_inner(arg, limit);
335 : }
336 : /* Make sure the recursive call is not a tail call, and the bzero */
337 : /* call is not recognized as dead code. */
338 41260 : GC_noop1((word)dummy);
339 41260 : return(arg);
340 : }
341 : #endif
342 :
343 : /* Clear some of the inaccessible part of the stack. Returns its */
344 : /* argument, so it can be used in a tail call position, hence clearing */
345 : /* another frame. */
346 54956 : GC_API void * GC_CALL GC_clear_stack(void *arg)
347 : {
348 54956 : ptr_t sp = GC_approx_sp(); /* Hotter than actual sp */
349 : # ifdef THREADS
350 : word volatile dummy[SMALL_CLEAR_SIZE];
351 : static unsigned random_no = 0;
352 : /* Should be more random than it is ... */
353 : /* Used to occasionally clear a bigger */
354 : /* chunk. */
355 : # endif
356 : ptr_t limit;
357 :
358 : # define SLOP 400
359 : /* Extra bytes we clear every time. This clears our own */
360 : /* activation record, and should cause more frequent */
361 : /* clearing near the cold end of the stack, a good thing. */
362 : # define GC_SLOP 4000
363 : /* We make GC_high_water this much hotter than we really saw */
364 : /* saw it, to cover for GC noise etc. above our current frame. */
365 : # define CLEAR_THRESHOLD 100000
366 : /* We restart the clearing process after this many bytes of */
367 : /* allocation. Otherwise very heavily recursive programs */
368 : /* with sparse stacks may result in heaps that grow almost */
369 : /* without bounds. As the heap gets larger, collection */
370 : /* frequency decreases, thus clearing frequency would decrease, */
371 : /* thus more junk remains accessible, thus the heap gets */
372 : /* larger ... */
373 : # ifdef THREADS
374 54956 : if (++random_no % 13 == 0) {
375 4126 : limit = sp;
376 4126 : MAKE_HOTTER(limit, BIG_CLEAR_SIZE*sizeof(word));
377 4126 : limit = (ptr_t)((word)limit & ~0xf);
378 : /* Make it sufficiently aligned for assembly */
379 : /* implementations of GC_clear_stack_inner. */
380 4126 : return GC_clear_stack_inner(arg, limit);
381 : } else {
382 50830 : BZERO((void *)dummy, SMALL_CLEAR_SIZE*sizeof(word));
383 50830 : return arg;
384 : }
385 : # else
386 : if (GC_gc_no > GC_stack_last_cleared) {
387 : /* Start things over, so we clear the entire stack again */
388 : if (GC_stack_last_cleared == 0) GC_high_water = (ptr_t)GC_stackbottom;
389 : GC_min_sp = GC_high_water;
390 : GC_stack_last_cleared = GC_gc_no;
391 : GC_bytes_allocd_at_reset = GC_bytes_allocd;
392 : }
393 : /* Adjust GC_high_water */
394 : MAKE_COOLER(GC_high_water, WORDS_TO_BYTES(DEGRADE_RATE) + GC_SLOP);
395 : if ((word)sp HOTTER_THAN (word)GC_high_water) {
396 : GC_high_water = sp;
397 : }
398 : MAKE_HOTTER(GC_high_water, GC_SLOP);
399 : limit = GC_min_sp;
400 : MAKE_HOTTER(limit, SLOP);
401 : if ((word)sp COOLER_THAN (word)limit) {
402 : limit = (ptr_t)((word)limit & ~0xf);
403 : /* Make it sufficiently aligned for assembly */
404 : /* implementations of GC_clear_stack_inner. */
405 : GC_min_sp = sp;
406 : return(GC_clear_stack_inner(arg, limit));
407 : } else if (GC_bytes_allocd - GC_bytes_allocd_at_reset > CLEAR_THRESHOLD) {
408 : /* Restart clearing process, but limit how much clearing we do. */
409 : GC_min_sp = sp;
410 : MAKE_HOTTER(GC_min_sp, CLEAR_THRESHOLD/4);
411 : if ((word)GC_min_sp HOTTER_THAN (word)GC_high_water)
412 : GC_min_sp = GC_high_water;
413 : GC_bytes_allocd_at_reset = GC_bytes_allocd;
414 : }
415 : return(arg);
416 : # endif
417 : }
418 :
419 :
420 : /* Return a pointer to the base address of p, given a pointer to a */
421 : /* an address within an object. Return 0 o.w. */
422 1010 : GC_API void * GC_CALL GC_base(void * p)
423 : {
424 : ptr_t r;
425 : struct hblk *h;
426 : bottom_index *bi;
427 : hdr *candidate_hdr;
428 : ptr_t limit;
429 :
430 1010 : r = p;
431 1010 : if (!EXPECT(GC_is_initialized, TRUE)) return 0;
432 1010 : h = HBLKPTR(r);
433 1010 : GET_BI(r, bi);
434 1010 : candidate_hdr = HDR_FROM_BI(bi, r);
435 1010 : if (candidate_hdr == 0) return(0);
436 : /* If it's a pointer to the middle of a large object, move it */
437 : /* to the beginning. */
438 150 : while (IS_FORWARDING_ADDR_OR_NIL(candidate_hdr)) {
439 82 : h = FORWARDED_ADDR(h,candidate_hdr);
440 82 : r = (ptr_t)h;
441 82 : candidate_hdr = HDR(h);
442 : }
443 34 : if (HBLK_IS_FREE(candidate_hdr)) return(0);
444 : /* Make sure r points to the beginning of the object */
445 34 : r = (ptr_t)((word)r & ~(WORDS_TO_BYTES(1) - 1));
446 : {
447 34 : size_t offset = HBLKDISPL(r);
448 34 : word sz = candidate_hdr -> hb_sz;
449 34 : size_t obj_displ = offset % sz;
450 :
451 34 : r -= obj_displ;
452 34 : limit = r + sz;
453 34 : if ((word)limit > (word)(h + 1) && sz <= HBLKSIZE) {
454 0 : return(0);
455 : }
456 34 : if ((word)p >= (word)limit) return(0);
457 : }
458 34 : return((void *)r);
459 : }
460 :
461 : /* Return TRUE if and only if p points to somewhere in GC heap. */
462 0 : GC_API int GC_CALL GC_is_heap_ptr(const void *p)
463 : {
464 : bottom_index *bi;
465 :
466 : GC_ASSERT(GC_is_initialized);
467 0 : GET_BI(p, bi);
468 0 : return HDR_FROM_BI(bi, p) != 0;
469 : }
470 :
471 : /* Return the size of an object, given a pointer to its base. */
472 : /* (For small objects this also happens to work from interior pointers, */
473 : /* but that shouldn't be relied upon.) */
474 0 : GC_API size_t GC_CALL GC_size(const void * p)
475 : {
476 0 : hdr * hhdr = HDR(p);
477 :
478 0 : return hhdr -> hb_sz;
479 : }
480 :
481 :
482 : /* These getters remain unsynchronized for compatibility (since some */
483 : /* clients could call some of them from a GC callback holding the */
484 : /* allocator lock). */
485 163 : GC_API size_t GC_CALL GC_get_heap_size(void)
486 : {
487 : /* ignore the memory space returned to OS (i.e. count only the */
488 : /* space owned by the garbage collector) */
489 163 : return (size_t)(GC_heapsize - GC_unmapped_bytes);
490 : }
491 :
492 0 : GC_API size_t GC_CALL GC_get_free_bytes(void)
493 : {
494 : /* ignore the memory space returned to OS */
495 0 : return (size_t)(GC_large_free_bytes - GC_unmapped_bytes);
496 : }
497 :
498 0 : GC_API size_t GC_CALL GC_get_unmapped_bytes(void)
499 : {
500 0 : return (size_t)GC_unmapped_bytes;
501 : }
502 :
503 0 : GC_API size_t GC_CALL GC_get_bytes_since_gc(void)
504 : {
505 0 : return (size_t)GC_bytes_allocd;
506 : }
507 :
508 0 : GC_API size_t GC_CALL GC_get_total_bytes(void)
509 : {
510 0 : return (size_t)(GC_bytes_allocd + GC_bytes_allocd_before_gc);
511 : }
512 :
513 : #ifndef GC_GET_HEAP_USAGE_NOT_NEEDED
514 :
515 : /* Return the heap usage information. This is a thread-safe (atomic) */
516 : /* alternative for the five above getters. NULL pointer is allowed for */
517 : /* any argument. Returned (filled in) values are of word type. */
518 0 : GC_API void GC_CALL GC_get_heap_usage_safe(GC_word *pheap_size,
519 : GC_word *pfree_bytes, GC_word *punmapped_bytes,
520 : GC_word *pbytes_since_gc, GC_word *ptotal_bytes)
521 : {
522 : DCL_LOCK_STATE;
523 :
524 0 : LOCK();
525 0 : if (pheap_size != NULL)
526 0 : *pheap_size = GC_heapsize - GC_unmapped_bytes;
527 0 : if (pfree_bytes != NULL)
528 0 : *pfree_bytes = GC_large_free_bytes - GC_unmapped_bytes;
529 0 : if (punmapped_bytes != NULL)
530 0 : *punmapped_bytes = GC_unmapped_bytes;
531 0 : if (pbytes_since_gc != NULL)
532 0 : *pbytes_since_gc = GC_bytes_allocd;
533 0 : if (ptotal_bytes != NULL)
534 0 : *ptotal_bytes = GC_bytes_allocd + GC_bytes_allocd_before_gc;
535 0 : UNLOCK();
536 0 : }
537 :
538 : GC_INNER word GC_reclaimed_bytes_before_gc = 0;
539 :
540 : /* Fill in GC statistics provided the destination is of enough size. */
541 0 : static void fill_prof_stats(struct GC_prof_stats_s *pstats)
542 : {
543 0 : pstats->heapsize_full = GC_heapsize;
544 0 : pstats->free_bytes_full = GC_large_free_bytes;
545 0 : pstats->unmapped_bytes = GC_unmapped_bytes;
546 0 : pstats->bytes_allocd_since_gc = GC_bytes_allocd;
547 0 : pstats->allocd_bytes_before_gc = GC_bytes_allocd_before_gc;
548 0 : pstats->non_gc_bytes = GC_non_gc_bytes;
549 0 : pstats->gc_no = GC_gc_no; /* could be -1 */
550 : # ifdef PARALLEL_MARK
551 0 : pstats->markers_m1 = (word)GC_markers_m1;
552 : # else
553 : pstats->markers_m1 = 0; /* one marker */
554 : # endif
555 0 : pstats->bytes_reclaimed_since_gc = GC_bytes_found > 0 ?
556 : (word)GC_bytes_found : 0;
557 0 : pstats->reclaimed_bytes_before_gc = GC_reclaimed_bytes_before_gc;
558 0 : }
559 :
560 : # include <string.h> /* for memset() */
561 :
562 0 : GC_API size_t GC_CALL GC_get_prof_stats(struct GC_prof_stats_s *pstats,
563 : size_t stats_sz)
564 : {
565 : struct GC_prof_stats_s stats;
566 : DCL_LOCK_STATE;
567 :
568 0 : LOCK();
569 0 : fill_prof_stats(stats_sz >= sizeof(stats) ? pstats : &stats);
570 0 : UNLOCK();
571 :
572 0 : if (stats_sz == sizeof(stats)) {
573 0 : return sizeof(stats);
574 0 : } else if (stats_sz > sizeof(stats)) {
575 : /* Fill in the remaining part with -1. */
576 0 : memset((char *)pstats + sizeof(stats), 0xff, stats_sz - sizeof(stats));
577 0 : return sizeof(stats);
578 : } else {
579 0 : BCOPY(&stats, pstats, stats_sz);
580 0 : return stats_sz;
581 : }
582 : }
583 :
584 : # ifdef THREADS
585 : /* The _unsafe version assumes the caller holds the allocation lock. */
586 0 : GC_API size_t GC_CALL GC_get_prof_stats_unsafe(
587 : struct GC_prof_stats_s *pstats,
588 : size_t stats_sz)
589 : {
590 : struct GC_prof_stats_s stats;
591 :
592 0 : if (stats_sz >= sizeof(stats)) {
593 0 : fill_prof_stats(pstats);
594 0 : if (stats_sz > sizeof(stats))
595 0 : memset((char *)pstats + sizeof(stats), 0xff,
596 : stats_sz - sizeof(stats));
597 0 : return sizeof(stats);
598 : } else {
599 0 : fill_prof_stats(&stats);
600 0 : BCOPY(&stats, pstats, stats_sz);
601 0 : return stats_sz;
602 : }
603 : }
604 : # endif /* THREADS */
605 :
606 : #endif /* !GC_GET_HEAP_USAGE_NOT_NEEDED */
607 :
608 : #if defined(GC_DARWIN_THREADS) || defined(GC_OPENBSD_UTHREADS) \
609 : || defined(GC_WIN32_THREADS) || (defined(NACL) && defined(THREADS))
610 : /* GC does not use signals to suspend and restart threads. */
611 : GC_API void GC_CALL GC_set_suspend_signal(int sig GC_ATTR_UNUSED)
612 : {
613 : /* empty */
614 : }
615 :
616 : GC_API void GC_CALL GC_set_thr_restart_signal(int sig GC_ATTR_UNUSED)
617 : {
618 : /* empty */
619 : }
620 :
621 : GC_API int GC_CALL GC_get_suspend_signal(void)
622 : {
623 : return -1;
624 : }
625 :
626 : GC_API int GC_CALL GC_get_thr_restart_signal(void)
627 : {
628 : return -1;
629 : }
630 : #endif /* GC_DARWIN_THREADS || GC_WIN32_THREADS || ... */
631 :
632 : #if !defined(_MAX_PATH) && (defined(MSWIN32) || defined(MSWINCE) \
633 : || defined(CYGWIN32))
634 : # define _MAX_PATH MAX_PATH
635 : #endif
636 :
637 : #ifdef GC_READ_ENV_FILE
638 : /* This works for Win32/WinCE for now. Really useful only for WinCE. */
639 : STATIC char *GC_envfile_content = NULL;
640 : /* The content of the GC "env" file with CR and */
641 : /* LF replaced to '\0'. NULL if the file is */
642 : /* missing or empty. Otherwise, always ends */
643 : /* with '\0'. */
644 : STATIC unsigned GC_envfile_length = 0;
645 : /* Length of GC_envfile_content (if non-NULL). */
646 :
647 : # ifndef GC_ENVFILE_MAXLEN
648 : # define GC_ENVFILE_MAXLEN 0x4000
649 : # endif
650 :
651 : /* The routine initializes GC_envfile_content from the GC "env" file. */
652 : STATIC void GC_envfile_init(void)
653 : {
654 : # if defined(MSWIN32) || defined(MSWINCE) || defined(CYGWIN32)
655 : HANDLE hFile;
656 : char *content;
657 : unsigned ofs;
658 : unsigned len;
659 : DWORD nBytesRead;
660 : TCHAR path[_MAX_PATH + 0x10]; /* buffer for path + ext */
661 : len = (unsigned)GetModuleFileName(NULL /* hModule */, path,
662 : _MAX_PATH + 1);
663 : /* If GetModuleFileName() has failed then len is 0. */
664 : if (len > 4 && path[len - 4] == (TCHAR)'.') {
665 : len -= 4; /* strip executable file extension */
666 : }
667 : BCOPY(TEXT(".gc.env"), &path[len], sizeof(TEXT(".gc.env")));
668 : hFile = CreateFile(path, GENERIC_READ,
669 : FILE_SHARE_READ | FILE_SHARE_WRITE,
670 : NULL /* lpSecurityAttributes */, OPEN_EXISTING,
671 : FILE_ATTRIBUTE_NORMAL, NULL /* hTemplateFile */);
672 : if (hFile == INVALID_HANDLE_VALUE)
673 : return; /* the file is absent or the operation is failed */
674 : len = (unsigned)GetFileSize(hFile, NULL);
675 : if (len <= 1 || len >= GC_ENVFILE_MAXLEN) {
676 : CloseHandle(hFile);
677 : return; /* invalid file length - ignoring the file content */
678 : }
679 : /* At this execution point, GC_setpagesize() and GC_init_win32() */
680 : /* must already be called (for GET_MEM() to work correctly). */
681 : content = (char *)GET_MEM(ROUNDUP_PAGESIZE_IF_MMAP(len + 1));
682 : if (content == NULL) {
683 : CloseHandle(hFile);
684 : return; /* allocation failure */
685 : }
686 : ofs = 0;
687 : nBytesRead = (DWORD)-1L;
688 : /* Last ReadFile() call should clear nBytesRead on success. */
689 : while (ReadFile(hFile, content + ofs, len - ofs + 1, &nBytesRead,
690 : NULL /* lpOverlapped */) && nBytesRead != 0) {
691 : if ((ofs += nBytesRead) > len)
692 : break;
693 : }
694 : CloseHandle(hFile);
695 : if (ofs != len || nBytesRead != 0)
696 : return; /* read operation is failed - ignoring the file content */
697 : content[ofs] = '\0';
698 : while (ofs-- > 0) {
699 : if (content[ofs] == '\r' || content[ofs] == '\n')
700 : content[ofs] = '\0';
701 : }
702 : GC_envfile_length = len + 1;
703 : GC_envfile_content = content;
704 : # endif
705 : }
706 :
707 : /* This routine scans GC_envfile_content for the specified */
708 : /* environment variable (and returns its value if found). */
709 : GC_INNER char * GC_envfile_getenv(const char *name)
710 : {
711 : char *p;
712 : char *end_of_content;
713 : unsigned namelen;
714 : # ifndef NO_GETENV
715 : p = getenv(name); /* try the standard getenv() first */
716 : if (p != NULL)
717 : return *p != '\0' ? p : NULL;
718 : # endif
719 : p = GC_envfile_content;
720 : if (p == NULL)
721 : return NULL; /* "env" file is absent (or empty) */
722 : namelen = strlen(name);
723 : if (namelen == 0) /* a sanity check */
724 : return NULL;
725 : for (end_of_content = p + GC_envfile_length;
726 : p != end_of_content; p += strlen(p) + 1) {
727 : if (strncmp(p, name, namelen) == 0 && *(p += namelen) == '=') {
728 : p++; /* the match is found; skip '=' */
729 : return *p != '\0' ? p : NULL;
730 : }
731 : /* If not matching then skip to the next line. */
732 : }
733 : return NULL; /* no match found */
734 : }
735 : #endif /* GC_READ_ENV_FILE */
736 :
737 : GC_INNER GC_bool GC_is_initialized = FALSE;
738 :
739 : #if (defined(MSWIN32) || defined(MSWINCE)) && defined(THREADS)
740 : GC_INNER CRITICAL_SECTION GC_write_cs;
741 : #endif
742 :
743 : #ifndef DONT_USE_ATEXIT
744 0 : STATIC void GC_exit_check(void)
745 : {
746 0 : if (GC_find_leak) {
747 0 : GC_gcollect();
748 : }
749 0 : }
750 : #endif
751 :
752 : #if defined(UNIX_LIKE) && !defined(NO_DEBUGGING)
753 0 : static void looping_handler(int sig)
754 : {
755 0 : GC_err_printf("Caught signal %d: looping in handler\n", sig);
756 : for (;;) {
757 : /* empty */
758 0 : }
759 : }
760 :
761 : static GC_bool installed_looping_handler = FALSE;
762 :
763 163 : static void maybe_install_looping_handler(void)
764 : {
765 : /* Install looping handler before the write fault handler, so we */
766 : /* handle write faults correctly. */
767 163 : if (!installed_looping_handler && 0 != GETENV("GC_LOOP_ON_ABORT")) {
768 0 : GC_set_and_save_fault_handler(looping_handler);
769 0 : installed_looping_handler = TRUE;
770 : }
771 163 : }
772 :
773 : #else /* !UNIX_LIKE */
774 : # define maybe_install_looping_handler()
775 : #endif
776 :
777 : #define GC_DEFAULT_STDOUT_FD 1
778 : #define GC_DEFAULT_STDERR_FD 2
779 :
780 : #if !defined(OS2) && !defined(MACOS) && !defined(GC_ANDROID_LOG) \
781 : && !defined(MSWIN32) && !defined(MSWINCE)
782 : STATIC int GC_stdout = GC_DEFAULT_STDOUT_FD;
783 : STATIC int GC_stderr = GC_DEFAULT_STDERR_FD;
784 : STATIC int GC_log = GC_DEFAULT_STDERR_FD;
785 : #endif
786 :
787 0 : STATIC word GC_parse_mem_size_arg(const char *str)
788 : {
789 : char *endptr;
790 0 : word result = 0; /* bad value */
791 : char ch;
792 :
793 0 : if (*str != '\0') {
794 0 : result = (word)STRTOULL(str, &endptr, 10);
795 0 : ch = *endptr;
796 0 : if (ch != '\0') {
797 0 : if (*(endptr + 1) != '\0')
798 0 : return 0;
799 : /* Allow k, M or G suffix. */
800 0 : switch (ch) {
801 : case 'K':
802 : case 'k':
803 0 : result <<= 10;
804 0 : break;
805 : case 'M':
806 : case 'm':
807 0 : result <<= 20;
808 0 : break;
809 : case 'G':
810 : case 'g':
811 0 : result <<= 30;
812 0 : break;
813 : default:
814 0 : result = 0;
815 : }
816 : }
817 : }
818 0 : return result;
819 : }
820 :
821 : #define GC_LOG_STD_NAME "gc.log"
822 :
823 163 : GC_API void GC_CALL GC_init(void)
824 : {
825 : /* LOCK(); -- no longer does anything this early. */
826 : word initial_heap_sz;
827 : IF_CANCEL(int cancel_state;)
828 :
829 163 : if (EXPECT(GC_is_initialized, TRUE)) return;
830 : # ifdef REDIRECT_MALLOC
831 : {
832 : static GC_bool init_started = FALSE;
833 : if (init_started)
834 : ABORT("Redirected malloc() called during GC init");
835 : init_started = TRUE;
836 : }
837 : # endif
838 :
839 : # ifdef GC_INITIAL_HEAP_SIZE
840 : initial_heap_sz = divHBLKSZ(GC_INITIAL_HEAP_SIZE);
841 : # else
842 163 : initial_heap_sz = (word)MINHINCR;
843 : # endif
844 163 : DISABLE_CANCEL(cancel_state);
845 : /* Note that although we are nominally called with the */
846 : /* allocation lock held, the allocation lock is now */
847 : /* only really acquired once a second thread is forked.*/
848 : /* And the initialization code needs to run before */
849 : /* then. Thus we really don't hold any locks, and can */
850 : /* in fact safely initialize them here. */
851 : # ifdef THREADS
852 : GC_ASSERT(!GC_need_to_lock);
853 : # ifdef SN_TARGET_PS3
854 : {
855 : pthread_mutexattr_t mattr;
856 : pthread_mutexattr_init(&mattr);
857 : pthread_mutex_init(&GC_allocate_ml, &mattr);
858 : pthread_mutexattr_destroy(&mattr);
859 : }
860 : # endif
861 : # endif /* THREADS */
862 : # if defined(GC_WIN32_THREADS) && !defined(GC_PTHREADS)
863 : {
864 : # ifndef MSWINCE
865 : BOOL (WINAPI *pfn) (LPCRITICAL_SECTION, DWORD) = NULL;
866 : HMODULE hK32 = GetModuleHandle(TEXT("kernel32.dll"));
867 : if (hK32)
868 : pfn = (BOOL (WINAPI *) (LPCRITICAL_SECTION, DWORD))
869 : GetProcAddress (hK32,
870 : "InitializeCriticalSectionAndSpinCount");
871 : if (pfn)
872 : pfn(&GC_allocate_ml, 4000);
873 : else
874 : # endif /* !MSWINCE */
875 : /* else */ InitializeCriticalSection (&GC_allocate_ml);
876 : }
877 : # endif /* GC_WIN32_THREADS */
878 : # if (defined(MSWIN32) || defined(MSWINCE)) && defined(THREADS)
879 : InitializeCriticalSection(&GC_write_cs);
880 : # endif
881 163 : GC_setpagesize();
882 : # ifdef MSWIN32
883 : GC_init_win32();
884 : # endif
885 : # ifdef GC_READ_ENV_FILE
886 : GC_envfile_init();
887 : # endif
888 : # ifndef SMALL_CONFIG
889 : # ifdef GC_PRINT_VERBOSE_STATS
890 : /* This is useful for debugging and profiling on platforms with */
891 : /* missing getenv() (like WinCE). */
892 : GC_print_stats = VERBOSE;
893 : # else
894 163 : if (0 != GETENV("GC_PRINT_VERBOSE_STATS")) {
895 0 : GC_print_stats = VERBOSE;
896 163 : } else if (0 != GETENV("GC_PRINT_STATS")) {
897 0 : GC_print_stats = 1;
898 : }
899 : # endif
900 : # if (defined(UNIX_LIKE) && !defined(GC_ANDROID_LOG)) \
901 : || defined(CYGWIN32) || defined(SYMBIAN)
902 : {
903 163 : char * file_name = GETENV("GC_LOG_FILE");
904 : # ifdef GC_LOG_TO_FILE_ALWAYS
905 : if (NULL == file_name)
906 : file_name = GC_LOG_STD_NAME;
907 : # else
908 163 : if (0 != file_name)
909 : # endif
910 : {
911 0 : int log_d = open(file_name, O_CREAT|O_WRONLY|O_APPEND, 0666);
912 0 : if (log_d < 0) {
913 0 : GC_err_printf("Failed to open %s as log file\n", file_name);
914 : } else {
915 : char *str;
916 0 : GC_log = log_d;
917 0 : str = GETENV("GC_ONLY_LOG_TO_FILE");
918 : # ifdef GC_ONLY_LOG_TO_FILE
919 : /* The similar environment variable set to "0" */
920 : /* overrides the effect of the macro defined. */
921 : if (str != NULL && *str == '0' && *(str + 1) == '\0')
922 : # else
923 : /* Otherwise setting the environment variable */
924 : /* to anything other than "0" will prevent from */
925 : /* redirecting stdout/err to the log file. */
926 0 : if (str == NULL || (*str == '0' && *(str + 1) == '\0'))
927 : # endif
928 : {
929 0 : GC_stdout = log_d;
930 0 : GC_stderr = log_d;
931 : }
932 : }
933 : }
934 : }
935 : # endif
936 : # endif /* !SMALL_CONFIG */
937 : # ifndef NO_DEBUGGING
938 163 : if (0 != GETENV("GC_DUMP_REGULARLY")) {
939 0 : GC_dump_regularly = TRUE;
940 : }
941 : # endif
942 : # ifdef KEEP_BACK_PTRS
943 : {
944 : char * backtraces_string = GETENV("GC_BACKTRACES");
945 : if (0 != backtraces_string) {
946 : GC_backtraces = atol(backtraces_string);
947 : if (backtraces_string[0] == '\0') GC_backtraces = 1;
948 : }
949 : }
950 : # endif
951 163 : if (0 != GETENV("GC_FIND_LEAK")) {
952 0 : GC_find_leak = 1;
953 : }
954 : # ifndef SHORT_DBG_HDRS
955 163 : if (0 != GETENV("GC_FINDLEAK_DELAY_FREE")) {
956 0 : GC_findleak_delay_free = TRUE;
957 : }
958 : # endif
959 163 : if (0 != GETENV("GC_ALL_INTERIOR_POINTERS")) {
960 0 : GC_all_interior_pointers = 1;
961 : }
962 163 : if (0 != GETENV("GC_DONT_GC")) {
963 0 : GC_dont_gc = 1;
964 : }
965 163 : if (0 != GETENV("GC_PRINT_BACK_HEIGHT")) {
966 0 : GC_print_back_height = TRUE;
967 : }
968 163 : if (0 != GETENV("GC_NO_BLACKLIST_WARNING")) {
969 0 : GC_large_alloc_warn_interval = LONG_MAX;
970 : }
971 : {
972 163 : char * addr_string = GETENV("GC_TRACE");
973 163 : if (0 != addr_string) {
974 : # ifndef ENABLE_TRACE
975 0 : WARN("Tracing not enabled: Ignoring GC_TRACE value\n", 0);
976 : # else
977 : word addr = (word)STRTOULL(addr_string, NULL, 16);
978 : if (addr < 0x1000)
979 : WARN("Unlikely trace address: %p\n", addr);
980 : GC_trace_addr = (ptr_t)addr;
981 : # endif
982 : }
983 : }
984 : # ifdef GC_COLLECT_AT_MALLOC
985 : {
986 : char * string = GETENV("GC_COLLECT_AT_MALLOC");
987 : if (0 != string) {
988 : size_t min_lb = (size_t)STRTOULL(string, NULL, 10);
989 : if (min_lb > 0)
990 : GC_dbg_collect_at_malloc_min_lb = min_lb;
991 : }
992 : }
993 : # endif
994 : # ifndef GC_DISABLE_INCREMENTAL
995 : {
996 163 : char * time_limit_string = GETENV("GC_PAUSE_TIME_TARGET");
997 163 : if (0 != time_limit_string) {
998 0 : long time_limit = atol(time_limit_string);
999 0 : if (time_limit < 5) {
1000 0 : WARN("GC_PAUSE_TIME_TARGET environment variable value too small "
1001 : "or bad syntax: Ignoring\n", 0);
1002 : } else {
1003 0 : GC_time_limit = time_limit;
1004 : }
1005 : }
1006 : }
1007 : # endif
1008 : # ifndef SMALL_CONFIG
1009 : {
1010 163 : char * full_freq_string = GETENV("GC_FULL_FREQUENCY");
1011 163 : if (full_freq_string != NULL) {
1012 0 : int full_freq = atoi(full_freq_string);
1013 0 : if (full_freq > 0)
1014 0 : GC_full_freq = full_freq;
1015 : }
1016 : }
1017 : # endif
1018 : {
1019 163 : char * interval_string = GETENV("GC_LARGE_ALLOC_WARN_INTERVAL");
1020 163 : if (0 != interval_string) {
1021 0 : long interval = atol(interval_string);
1022 0 : if (interval <= 0) {
1023 0 : WARN("GC_LARGE_ALLOC_WARN_INTERVAL environment variable has "
1024 : "bad value: Ignoring\n", 0);
1025 : } else {
1026 0 : GC_large_alloc_warn_interval = interval;
1027 : }
1028 : }
1029 : }
1030 : {
1031 163 : char * space_divisor_string = GETENV("GC_FREE_SPACE_DIVISOR");
1032 163 : if (space_divisor_string != NULL) {
1033 0 : int space_divisor = atoi(space_divisor_string);
1034 0 : if (space_divisor > 0)
1035 0 : GC_free_space_divisor = (GC_word)space_divisor;
1036 : }
1037 : }
1038 : # ifdef USE_MUNMAP
1039 : {
1040 : char * string = GETENV("GC_UNMAP_THRESHOLD");
1041 : if (string != NULL) {
1042 : if (*string == '0' && *(string + 1) == '\0') {
1043 : /* "0" is used to disable unmapping. */
1044 : GC_unmap_threshold = 0;
1045 : } else {
1046 : int unmap_threshold = atoi(string);
1047 : if (unmap_threshold > 0)
1048 : GC_unmap_threshold = unmap_threshold;
1049 : }
1050 : }
1051 : }
1052 : {
1053 : char * string = GETENV("GC_FORCE_UNMAP_ON_GCOLLECT");
1054 : if (string != NULL) {
1055 : if (*string == '0' && *(string + 1) == '\0') {
1056 : /* "0" is used to turn off the mode. */
1057 : GC_force_unmap_on_gcollect = FALSE;
1058 : } else {
1059 : GC_force_unmap_on_gcollect = TRUE;
1060 : }
1061 : }
1062 : }
1063 : {
1064 : char * string = GETENV("GC_USE_ENTIRE_HEAP");
1065 : if (string != NULL) {
1066 : if (*string == '0' && *(string + 1) == '\0') {
1067 : /* "0" is used to turn off the mode. */
1068 : GC_use_entire_heap = FALSE;
1069 : } else {
1070 : GC_use_entire_heap = TRUE;
1071 : }
1072 : }
1073 : }
1074 : # endif
1075 163 : maybe_install_looping_handler();
1076 : /* Adjust normal object descriptor for extra allocation. */
1077 163 : if (ALIGNMENT > GC_DS_TAGS && EXTRA_BYTES != 0) {
1078 0 : GC_obj_kinds[NORMAL].ok_descriptor = ((word)(-ALIGNMENT) | GC_DS_LENGTH);
1079 : }
1080 163 : GC_exclude_static_roots_inner(beginGC_arrays, endGC_arrays);
1081 163 : GC_exclude_static_roots_inner(beginGC_obj_kinds, endGC_obj_kinds);
1082 : # ifdef SEPARATE_GLOBALS
1083 : GC_exclude_static_roots_inner(beginGC_objfreelist, endGC_objfreelist);
1084 : GC_exclude_static_roots_inner(beginGC_aobjfreelist, endGC_aobjfreelist);
1085 : # endif
1086 : # if defined(USE_PROC_FOR_LIBRARIES) && defined(GC_LINUX_THREADS)
1087 : WARN("USE_PROC_FOR_LIBRARIES + GC_LINUX_THREADS performs poorly.\n", 0);
1088 : /* If thread stacks are cached, they tend to be scanned in */
1089 : /* entirety as part of the root set. This wil grow them to */
1090 : /* maximum size, and is generally not desirable. */
1091 : # endif
1092 : # if defined(SEARCH_FOR_DATA_START)
1093 163 : GC_init_linux_data_start();
1094 : # endif
1095 : # if defined(NETBSD) && defined(__ELF__)
1096 : GC_init_netbsd_elf();
1097 : # endif
1098 : # if !defined(THREADS) || defined(GC_PTHREADS) \
1099 : || defined(GC_WIN32_THREADS) || defined(GC_SOLARIS_THREADS)
1100 163 : if (GC_stackbottom == 0) {
1101 163 : GC_stackbottom = GC_get_main_stack_base();
1102 : # if (defined(LINUX) || defined(HPUX)) && defined(IA64)
1103 : GC_register_stackbottom = GC_get_register_stack_base();
1104 : # endif
1105 : } else {
1106 : # if (defined(LINUX) || defined(HPUX)) && defined(IA64)
1107 : if (GC_register_stackbottom == 0) {
1108 : WARN("GC_register_stackbottom should be set with GC_stackbottom\n", 0);
1109 : /* The following may fail, since we may rely on */
1110 : /* alignment properties that may not hold with a user set */
1111 : /* GC_stackbottom. */
1112 : GC_register_stackbottom = GC_get_register_stack_base();
1113 : }
1114 : # endif
1115 : }
1116 : # endif
1117 : GC_STATIC_ASSERT(sizeof (ptr_t) == sizeof(word));
1118 : GC_STATIC_ASSERT(sizeof (signed_word) == sizeof(word));
1119 : GC_STATIC_ASSERT(sizeof (struct hblk) == HBLKSIZE);
1120 : # ifndef THREADS
1121 : GC_ASSERT(!((word)GC_stackbottom HOTTER_THAN (word)GC_approx_sp()));
1122 : # endif
1123 : # if !defined(_AUX_SOURCE) || defined(__GNUC__)
1124 : GC_STATIC_ASSERT((word)(-1) > (word)0);
1125 : /* word should be unsigned */
1126 : # endif
1127 : /* We no longer check for ((void*)(-1) > NULL) since all pointers */
1128 : /* are explicitly cast to word in every less-greater comparison. */
1129 : GC_STATIC_ASSERT((signed_word)(-1) < (signed_word)0);
1130 : # ifndef GC_DISABLE_INCREMENTAL
1131 163 : if (GC_incremental || 0 != GETENV("GC_ENABLE_INCREMENTAL")) {
1132 : /* For GWW_VDB on Win32, this needs to happen before any */
1133 : /* heap memory is allocated. */
1134 0 : GC_dirty_init();
1135 : GC_ASSERT(GC_bytes_allocd == 0);
1136 0 : GC_incremental = TRUE;
1137 : }
1138 : # endif
1139 :
1140 : /* Add initial guess of root sets. Do this first, since sbrk(0) */
1141 : /* might be used. */
1142 163 : if (GC_REGISTER_MAIN_STATIC_DATA()) GC_register_data_segments();
1143 163 : GC_init_headers();
1144 163 : GC_bl_init();
1145 163 : GC_mark_init();
1146 : {
1147 163 : char * sz_str = GETENV("GC_INITIAL_HEAP_SIZE");
1148 163 : if (sz_str != NULL) {
1149 0 : initial_heap_sz = GC_parse_mem_size_arg(sz_str);
1150 0 : if (initial_heap_sz <= MINHINCR * HBLKSIZE) {
1151 0 : WARN("Bad initial heap size %s - ignoring it.\n", sz_str);
1152 : }
1153 0 : initial_heap_sz = divHBLKSZ(initial_heap_sz);
1154 : }
1155 : }
1156 : {
1157 163 : char * sz_str = GETENV("GC_MAXIMUM_HEAP_SIZE");
1158 163 : if (sz_str != NULL) {
1159 0 : word max_heap_sz = GC_parse_mem_size_arg(sz_str);
1160 0 : if (max_heap_sz < initial_heap_sz * HBLKSIZE) {
1161 0 : WARN("Bad maximum heap size %s - ignoring it.\n", sz_str);
1162 : }
1163 0 : if (0 == GC_max_retries) GC_max_retries = 2;
1164 0 : GC_set_max_heap_size(max_heap_sz);
1165 : }
1166 : }
1167 163 : if (!GC_expand_hp_inner(initial_heap_sz)) {
1168 0 : GC_err_printf("Can't start up: not enough memory\n");
1169 0 : EXIT();
1170 : } else {
1171 163 : GC_requested_heapsize += initial_heap_sz;
1172 : }
1173 163 : if (GC_all_interior_pointers)
1174 0 : GC_initialize_offsets();
1175 163 : GC_register_displacement_inner(0L);
1176 : # if defined(GC_LINUX_THREADS) && defined(REDIRECT_MALLOC)
1177 : if (!GC_all_interior_pointers) {
1178 : /* TLS ABI uses pointer-sized offsets for dtv. */
1179 : GC_register_displacement_inner(sizeof(void *));
1180 : }
1181 : # endif
1182 163 : GC_init_size_map();
1183 : # ifdef PCR
1184 : if (PCR_IL_Lock(PCR_Bool_false, PCR_allSigsBlocked, PCR_waitForever)
1185 : != PCR_ERes_okay) {
1186 : ABORT("Can't lock load state");
1187 : } else if (PCR_IL_Unlock() != PCR_ERes_okay) {
1188 : ABORT("Can't unlock load state");
1189 : }
1190 : PCR_IL_Unlock();
1191 : GC_pcr_install();
1192 : # endif
1193 163 : GC_is_initialized = TRUE;
1194 : # if defined(GC_PTHREADS) || defined(GC_WIN32_THREADS)
1195 163 : GC_thr_init();
1196 : # endif
1197 163 : COND_DUMP;
1198 : /* Get black list set up and/or incremental GC started */
1199 163 : if (!GC_dont_precollect || GC_incremental) GC_gcollect_inner();
1200 : # ifdef STUBBORN_ALLOC
1201 : GC_stubborn_init();
1202 : # endif
1203 : # ifndef DONT_USE_ATEXIT
1204 163 : if (GC_find_leak) {
1205 : /* This is to give us at least one chance to detect leaks. */
1206 : /* This may report some very benign leaks, but ... */
1207 0 : atexit(GC_exit_check);
1208 : }
1209 : # endif
1210 :
1211 : /* The rest of this again assumes we don't really hold */
1212 : /* the allocation lock. */
1213 : # if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC)
1214 : /* Make sure marker threads are started and thread local */
1215 : /* allocation is initialized, in case we didn't get */
1216 : /* called from GC_init_parallel. */
1217 163 : GC_init_parallel();
1218 : # endif /* PARALLEL_MARK || THREAD_LOCAL_ALLOC */
1219 :
1220 : # if defined(DYNAMIC_LOADING) && defined(DARWIN)
1221 : /* This must be called WITHOUT the allocation lock held */
1222 : /* and before any threads are created. */
1223 : GC_init_dyld();
1224 : # endif
1225 163 : RESTORE_CANCEL(cancel_state);
1226 : }
1227 :
1228 0 : GC_API void GC_CALL GC_enable_incremental(void)
1229 : {
1230 : # if !defined(GC_DISABLE_INCREMENTAL) && !defined(KEEP_BACK_PTRS)
1231 : DCL_LOCK_STATE;
1232 : /* If we are keeping back pointers, the GC itself dirties all */
1233 : /* pages on which objects have been marked, making */
1234 : /* incremental GC pointless. */
1235 0 : if (!GC_find_leak && 0 == GETENV("GC_DISABLE_INCREMENTAL")) {
1236 0 : LOCK();
1237 0 : if (!GC_incremental) {
1238 0 : GC_setpagesize();
1239 : /* if (GC_no_win32_dlls) goto out; Should be win32S test? */
1240 0 : maybe_install_looping_handler(); /* Before write fault handler! */
1241 0 : GC_incremental = TRUE;
1242 0 : if (!GC_is_initialized) {
1243 0 : GC_init();
1244 : } else {
1245 0 : GC_dirty_init();
1246 : }
1247 0 : if (GC_dirty_maintained && !GC_dont_gc) {
1248 : /* Can't easily do it if GC_dont_gc. */
1249 0 : if (GC_bytes_allocd > 0) {
1250 : /* There may be unmarked reachable objects. */
1251 0 : GC_gcollect_inner();
1252 : }
1253 : /* else we're OK in assuming everything's */
1254 : /* clean since nothing can point to an */
1255 : /* unmarked object. */
1256 0 : GC_read_dirty();
1257 : }
1258 : }
1259 0 : UNLOCK();
1260 0 : return;
1261 : }
1262 : # endif
1263 0 : GC_init();
1264 : }
1265 :
1266 : #if defined(THREADS) && (!defined(PARALLEL_MARK) || !defined(CAN_HANDLE_FORK))
1267 : GC_API void GC_CALL GC_start_mark_threads(void)
1268 : {
1269 : /* No action since parallel markers are disabled (or no POSIX fork). */
1270 : GC_ASSERT(I_DONT_HOLD_LOCK());
1271 : }
1272 : #endif
1273 :
1274 : #if defined(MSWIN32) || defined(MSWINCE)
1275 :
1276 : # if defined(_MSC_VER) && defined(_DEBUG) && !defined(MSWINCE)
1277 : # include <crtdbg.h>
1278 : # endif
1279 :
1280 : STATIC HANDLE GC_log = 0;
1281 :
1282 : void GC_deinit(void)
1283 : {
1284 : # ifdef THREADS
1285 : if (GC_is_initialized) {
1286 : DeleteCriticalSection(&GC_write_cs);
1287 : }
1288 : # endif
1289 : }
1290 :
1291 : # ifdef THREADS
1292 : # ifdef PARALLEL_MARK
1293 : # define IF_NEED_TO_LOCK(x) if (GC_parallel || GC_need_to_lock) x
1294 : # else
1295 : # define IF_NEED_TO_LOCK(x) if (GC_need_to_lock) x
1296 : # endif
1297 : # else
1298 : # define IF_NEED_TO_LOCK(x)
1299 : # endif /* !THREADS */
1300 :
1301 : STATIC HANDLE GC_CreateLogFile(void)
1302 : {
1303 : HANDLE hFile;
1304 : TCHAR *logPath;
1305 : BOOL appendToFile = FALSE;
1306 : # if !defined(NO_GETENV_WIN32) || !defined(OLD_WIN32_LOG_FILE)
1307 : TCHAR pathBuf[_MAX_PATH + 0x10]; /* buffer for path + ext */
1308 :
1309 : logPath = pathBuf;
1310 : # endif
1311 :
1312 : /* Use GetEnvironmentVariable instead of GETENV() for unicode support. */
1313 : # ifndef NO_GETENV_WIN32
1314 : if (GetEnvironmentVariable(TEXT("GC_LOG_FILE"), pathBuf,
1315 : _MAX_PATH + 1) - 1U < (DWORD)_MAX_PATH) {
1316 : appendToFile = TRUE;
1317 : } else
1318 : # endif
1319 : /* else */ {
1320 : /* Env var not found or its value too long. */
1321 : # ifdef OLD_WIN32_LOG_FILE
1322 : logPath = TEXT(GC_LOG_STD_NAME);
1323 : # else
1324 : int len = (int)GetModuleFileName(NULL /* hModule */, pathBuf,
1325 : _MAX_PATH + 1);
1326 : /* If GetModuleFileName() has failed then len is 0. */
1327 : if (len > 4 && pathBuf[len - 4] == (TCHAR)'.') {
1328 : len -= 4; /* strip executable file extension */
1329 : }
1330 : BCOPY(TEXT(".") TEXT(GC_LOG_STD_NAME), &pathBuf[len],
1331 : sizeof(TEXT(".") TEXT(GC_LOG_STD_NAME)));
1332 : # endif
1333 : }
1334 :
1335 : hFile = CreateFile(logPath, GENERIC_WRITE, FILE_SHARE_READ,
1336 : NULL /* lpSecurityAttributes */,
1337 : appendToFile ? OPEN_ALWAYS : CREATE_ALWAYS,
1338 : GC_print_stats == VERBOSE ? FILE_ATTRIBUTE_NORMAL :
1339 : /* immediately flush writes unless very verbose */
1340 : FILE_ATTRIBUTE_NORMAL | FILE_FLAG_WRITE_THROUGH,
1341 : NULL /* hTemplateFile */);
1342 : # ifndef NO_GETENV_WIN32
1343 : if (appendToFile && hFile != INVALID_HANDLE_VALUE) {
1344 : LONG posHigh = 0;
1345 : (void)SetFilePointer(hFile, 0, &posHigh, FILE_END);
1346 : /* Seek to file end (ignoring any error) */
1347 : }
1348 : # endif
1349 : return hFile;
1350 : }
1351 :
1352 : STATIC int GC_write(const char *buf, size_t len)
1353 : {
1354 : BOOL res;
1355 : DWORD written;
1356 : # if defined(THREADS) && defined(GC_ASSERTIONS)
1357 : static GC_bool inside_write = FALSE;
1358 : /* to prevent infinite recursion at abort. */
1359 : if (inside_write)
1360 : return -1;
1361 : # endif
1362 :
1363 : if (len == 0)
1364 : return 0;
1365 : IF_NEED_TO_LOCK(EnterCriticalSection(&GC_write_cs));
1366 : # if defined(THREADS) && defined(GC_ASSERTIONS)
1367 : if (GC_write_disabled) {
1368 : inside_write = TRUE;
1369 : ABORT("Assertion failure: GC_write called with write_disabled");
1370 : }
1371 : # endif
1372 : if (GC_log == 0) {
1373 : GC_log = GC_CreateLogFile();
1374 : }
1375 : if (GC_log == INVALID_HANDLE_VALUE) {
1376 : IF_NEED_TO_LOCK(LeaveCriticalSection(&GC_write_cs));
1377 : # ifdef NO_DEBUGGING
1378 : /* Ignore open log failure (e.g., it might be caused by */
1379 : /* read-only folder of the client application). */
1380 : return 0;
1381 : # else
1382 : return -1;
1383 : # endif
1384 : }
1385 : res = WriteFile(GC_log, buf, (DWORD)len, &written, NULL);
1386 : # if defined(_MSC_VER) && defined(_DEBUG)
1387 : # ifdef MSWINCE
1388 : /* There is no CrtDbgReport() in WinCE */
1389 : {
1390 : WCHAR wbuf[1024];
1391 : /* Always use Unicode variant of OutputDebugString() */
1392 : wbuf[MultiByteToWideChar(CP_ACP, 0 /* dwFlags */,
1393 : buf, len, wbuf,
1394 : sizeof(wbuf) / sizeof(wbuf[0]) - 1)] = 0;
1395 : OutputDebugStringW(wbuf);
1396 : }
1397 : # else
1398 : _CrtDbgReport(_CRT_WARN, NULL, 0, NULL, "%.*s", len, buf);
1399 : # endif
1400 : # endif
1401 : IF_NEED_TO_LOCK(LeaveCriticalSection(&GC_write_cs));
1402 : return res ? (int)written : -1;
1403 : }
1404 :
1405 : /* FIXME: This is pretty ugly ... */
1406 : # define WRITE(f, buf, len) GC_write(buf, len)
1407 :
1408 : #elif defined(OS2) || defined(MACOS)
1409 : STATIC FILE * GC_stdout = NULL;
1410 : STATIC FILE * GC_stderr = NULL;
1411 : STATIC FILE * GC_log = NULL;
1412 :
1413 : /* Initialize GC_log (and the friends) passed to GC_write(). */
1414 : STATIC void GC_set_files(void)
1415 : {
1416 : if (GC_stdout == NULL) {
1417 : GC_stdout = stdout;
1418 : }
1419 : if (GC_stderr == NULL) {
1420 : GC_stderr = stderr;
1421 : }
1422 : if (GC_log == NULL) {
1423 : GC_log = stderr;
1424 : }
1425 : }
1426 :
1427 : GC_INLINE int GC_write(FILE *f, const char *buf, size_t len)
1428 : {
1429 : int res = fwrite(buf, 1, len, f);
1430 : fflush(f);
1431 : return res;
1432 : }
1433 :
1434 : # define WRITE(f, buf, len) (GC_set_files(), GC_write(f, buf, len))
1435 :
1436 : #elif defined(GC_ANDROID_LOG)
1437 :
1438 : # include <android/log.h>
1439 :
1440 : # ifndef GC_ANDROID_LOG_TAG
1441 : # define GC_ANDROID_LOG_TAG "BDWGC"
1442 : # endif
1443 :
1444 : # define GC_stdout ANDROID_LOG_DEBUG
1445 : # define GC_stderr ANDROID_LOG_ERROR
1446 : # define GC_log GC_stdout
1447 :
1448 : # define WRITE(level, buf, unused_len) \
1449 : __android_log_write(level, GC_ANDROID_LOG_TAG, buf)
1450 :
1451 : #else
1452 : # if !defined(AMIGA) && !defined(__CC_ARM)
1453 : # include <unistd.h>
1454 : # endif
1455 :
1456 0 : STATIC int GC_write(int fd, const char *buf, size_t len)
1457 : {
1458 : # if defined(ECOS) || defined(NOSYS)
1459 : # ifdef ECOS
1460 : /* FIXME: This seems to be defined nowhere at present. */
1461 : /* _Jv_diag_write(buf, len); */
1462 : # else
1463 : /* No writing. */
1464 : # endif
1465 : return len;
1466 : # else
1467 0 : int bytes_written = 0;
1468 : int result;
1469 : IF_CANCEL(int cancel_state;)
1470 :
1471 0 : DISABLE_CANCEL(cancel_state);
1472 0 : while ((size_t)bytes_written < len) {
1473 : # ifdef GC_SOLARIS_THREADS
1474 : result = syscall(SYS_write, fd, buf + bytes_written,
1475 : len - bytes_written);
1476 : # else
1477 0 : result = write(fd, buf + bytes_written, len - bytes_written);
1478 : # endif
1479 0 : if (-1 == result) {
1480 0 : RESTORE_CANCEL(cancel_state);
1481 0 : return(result);
1482 : }
1483 0 : bytes_written += result;
1484 : }
1485 0 : RESTORE_CANCEL(cancel_state);
1486 0 : return(bytes_written);
1487 : # endif
1488 : }
1489 :
1490 : # define WRITE(f, buf, len) GC_write(f, buf, len)
1491 : #endif /* !MSWIN32 && !OS2 && !MACOS && !GC_ANDROID_LOG */
1492 :
1493 : #define BUFSZ 1024
1494 :
1495 : #ifdef NO_VSNPRINTF
1496 : /* In case this function is missing (e.g., in DJGPP v2.0.3). */
1497 : # define GC_VSNPRINTF(buf, bufsz, format, args) vsprintf(buf, format, args)
1498 : #elif defined(_MSC_VER)
1499 : # ifdef MSWINCE
1500 : /* _vsnprintf is deprecated in WinCE */
1501 : # define GC_VSNPRINTF StringCchVPrintfA
1502 : # else
1503 : # define GC_VSNPRINTF _vsnprintf
1504 : # endif
1505 : #else
1506 : # define GC_VSNPRINTF vsnprintf
1507 : #endif
1508 :
1509 : /* A version of printf that is unlikely to call malloc, and is thus safer */
1510 : /* to call from the collector in case malloc has been bound to GC_malloc. */
1511 : /* Floating point arguments and formats should be avoided, since FP */
1512 : /* conversion is more likely to allocate memory. */
1513 : /* Assumes that no more than BUFSZ-1 characters are written at once. */
1514 : #define GC_PRINTF_FILLBUF(buf, format) \
1515 : do { \
1516 : va_list args; \
1517 : va_start(args, format); \
1518 : (buf)[sizeof(buf) - 1] = 0x15; /* guard */ \
1519 : (void)GC_VSNPRINTF(buf, sizeof(buf) - 1, format, args); \
1520 : va_end(args); \
1521 : if ((buf)[sizeof(buf) - 1] != 0x15) \
1522 : ABORT("GC_printf clobbered stack"); \
1523 : } while (0)
1524 :
1525 0 : void GC_printf(const char *format, ...)
1526 : {
1527 : char buf[BUFSZ + 1];
1528 :
1529 0 : if (!GC_quiet) {
1530 0 : GC_PRINTF_FILLBUF(buf, format);
1531 0 : if (WRITE(GC_stdout, buf, strlen(buf)) < 0)
1532 0 : ABORT("write to stdout failed");
1533 : }
1534 0 : }
1535 :
1536 0 : void GC_err_printf(const char *format, ...)
1537 : {
1538 : char buf[BUFSZ + 1];
1539 :
1540 0 : GC_PRINTF_FILLBUF(buf, format);
1541 0 : GC_err_puts(buf);
1542 0 : }
1543 :
1544 0 : void GC_log_printf(const char *format, ...)
1545 : {
1546 : char buf[BUFSZ + 1];
1547 :
1548 0 : GC_PRINTF_FILLBUF(buf, format);
1549 0 : if (WRITE(GC_log, buf, strlen(buf)) < 0)
1550 0 : ABORT("write to GC log failed");
1551 0 : }
1552 :
1553 : #ifndef GC_ANDROID_LOG
1554 :
1555 : # define GC_warn_printf GC_err_printf
1556 :
1557 : #else
1558 :
1559 : GC_INNER void GC_info_log_printf(const char *format, ...)
1560 : {
1561 : char buf[BUFSZ + 1];
1562 :
1563 : GC_PRINTF_FILLBUF(buf, format);
1564 : (void)WRITE(ANDROID_LOG_INFO, buf, 0 /* unused */);
1565 : }
1566 :
1567 : GC_INNER void GC_verbose_log_printf(const char *format, ...)
1568 : {
1569 : char buf[BUFSZ + 1];
1570 :
1571 : GC_PRINTF_FILLBUF(buf, format);
1572 : (void)WRITE(ANDROID_LOG_VERBOSE, buf, 0); /* ignore write errors */
1573 : }
1574 :
1575 : STATIC void GC_warn_printf(const char *format, ...)
1576 : {
1577 : char buf[BUFSZ + 1];
1578 :
1579 : GC_PRINTF_FILLBUF(buf, format);
1580 : (void)WRITE(ANDROID_LOG_WARN, buf, 0);
1581 : }
1582 :
1583 : #endif /* GC_ANDROID_LOG */
1584 :
1585 0 : void GC_err_puts(const char *s)
1586 : {
1587 0 : (void)WRITE(GC_stderr, s, strlen(s)); /* ignore errors */
1588 0 : }
1589 :
1590 0 : STATIC void GC_CALLBACK GC_default_warn_proc(char *msg, GC_word arg)
1591 : {
1592 : /* TODO: Add assertion on arg comply with msg (format). */
1593 0 : GC_warn_printf(msg, arg);
1594 0 : }
1595 :
1596 : GC_INNER GC_warn_proc GC_current_warn_proc = GC_default_warn_proc;
1597 :
1598 : /* This is recommended for production code (release). */
1599 0 : GC_API void GC_CALLBACK GC_ignore_warn_proc(char *msg, GC_word arg)
1600 : {
1601 0 : if (GC_print_stats) {
1602 : /* Don't ignore warnings if stats printing is on. */
1603 0 : GC_default_warn_proc(msg, arg);
1604 : }
1605 0 : }
1606 :
1607 163 : GC_API void GC_CALL GC_set_warn_proc(GC_warn_proc p)
1608 : {
1609 : DCL_LOCK_STATE;
1610 : GC_ASSERT(p != 0);
1611 : # ifdef GC_WIN32_THREADS
1612 : # ifdef CYGWIN32
1613 : /* Need explicit GC_INIT call */
1614 : GC_ASSERT(GC_is_initialized);
1615 : # else
1616 : if (!GC_is_initialized) GC_init();
1617 : # endif
1618 : # endif
1619 163 : LOCK();
1620 163 : GC_current_warn_proc = p;
1621 163 : UNLOCK();
1622 163 : }
1623 :
1624 0 : GC_API GC_warn_proc GC_CALL GC_get_warn_proc(void)
1625 : {
1626 : GC_warn_proc result;
1627 : DCL_LOCK_STATE;
1628 0 : LOCK();
1629 0 : result = GC_current_warn_proc;
1630 0 : UNLOCK();
1631 0 : return(result);
1632 : }
1633 :
1634 : #if !defined(PCR) && !defined(SMALL_CONFIG)
1635 : /* Print (or display) a message before abnormal exit (including */
1636 : /* abort). Invoked from ABORT(msg) macro (there msg is non-NULL) */
1637 : /* and from EXIT() macro (msg is NULL in that case). */
1638 0 : STATIC void GC_CALLBACK GC_default_on_abort(const char *msg)
1639 : {
1640 0 : GC_find_leak = FALSE; /* disable at-exit GC_gcollect() */
1641 :
1642 0 : if (msg != NULL) {
1643 : # if defined(MSWIN32)
1644 : # ifndef DONT_USE_USER32_DLL
1645 : /* Use static binding to "user32.dll". */
1646 : (void)MessageBoxA(NULL, msg, "Fatal error in GC",
1647 : MB_ICONERROR | MB_OK);
1648 : # else
1649 : /* This simplifies linking - resolve "MessageBoxA" at run-time. */
1650 : HINSTANCE hU32 = LoadLibrary(TEXT("user32.dll"));
1651 : if (hU32) {
1652 : FARPROC pfn = GetProcAddress(hU32, "MessageBoxA");
1653 : if (pfn)
1654 : (void)(*(int (WINAPI *)(HWND, LPCSTR, LPCSTR, UINT))pfn)(
1655 : NULL /* hWnd */, msg, "Fatal error in GC",
1656 : MB_ICONERROR | MB_OK);
1657 : (void)FreeLibrary(hU32);
1658 : }
1659 : # endif
1660 : /* Also duplicate msg to GC log file. */
1661 : # endif
1662 :
1663 : # ifndef GC_ANDROID_LOG
1664 : /* Avoid calling GC_err_printf() here, as GC_on_abort() could be */
1665 : /* called from it. Note 1: this is not an atomic output. */
1666 : /* Note 2: possible write errors are ignored. */
1667 : # if defined(THREADS) && defined(GC_ASSERTIONS) \
1668 : && (defined(MSWIN32) || defined(MSWINCE))
1669 : if (!GC_write_disabled)
1670 : # endif
1671 : {
1672 0 : if (WRITE(GC_stderr, (void *)msg, strlen(msg)) >= 0)
1673 0 : (void)WRITE(GC_stderr, (void *)("\n"), 1);
1674 : }
1675 : # else
1676 : __android_log_assert("*" /* cond */, GC_ANDROID_LOG_TAG, "%s\n", msg);
1677 : # endif
1678 : }
1679 :
1680 : # if !defined(NO_DEBUGGING) && !defined(GC_ANDROID_LOG)
1681 0 : if (GETENV("GC_LOOP_ON_ABORT") != NULL) {
1682 : /* In many cases it's easier to debug a running process. */
1683 : /* It's arguably nicer to sleep, but that makes it harder */
1684 : /* to look at the thread if the debugger doesn't know much */
1685 : /* about threads. */
1686 : for(;;) {
1687 : /* Empty */
1688 0 : }
1689 : }
1690 : # endif
1691 0 : }
1692 :
1693 : GC_abort_func GC_on_abort = GC_default_on_abort;
1694 :
1695 0 : GC_API void GC_CALL GC_set_abort_func(GC_abort_func fn)
1696 : {
1697 : DCL_LOCK_STATE;
1698 : GC_ASSERT(fn != 0);
1699 0 : LOCK();
1700 0 : GC_on_abort = fn;
1701 0 : UNLOCK();
1702 0 : }
1703 :
1704 0 : GC_API GC_abort_func GC_CALL GC_get_abort_func(void)
1705 : {
1706 : GC_abort_func fn;
1707 : DCL_LOCK_STATE;
1708 0 : LOCK();
1709 0 : fn = GC_on_abort;
1710 0 : UNLOCK();
1711 0 : return fn;
1712 : }
1713 : #endif /* !SMALL_CONFIG */
1714 :
1715 0 : GC_API void GC_CALL GC_enable(void)
1716 : {
1717 : DCL_LOCK_STATE;
1718 :
1719 0 : LOCK();
1720 : GC_ASSERT(GC_dont_gc != 0); /* ensure no counter underflow */
1721 0 : GC_dont_gc--;
1722 0 : UNLOCK();
1723 0 : }
1724 :
1725 0 : GC_API void GC_CALL GC_disable(void)
1726 : {
1727 : DCL_LOCK_STATE;
1728 0 : LOCK();
1729 0 : GC_dont_gc++;
1730 0 : UNLOCK();
1731 0 : }
1732 :
1733 0 : GC_API int GC_CALL GC_is_disabled(void)
1734 : {
1735 0 : return GC_dont_gc != 0;
1736 : }
1737 :
1738 : /* Helper procedures for new kind creation. */
1739 0 : GC_API void ** GC_CALL GC_new_free_list_inner(void)
1740 : {
1741 0 : void *result = GC_INTERNAL_MALLOC((MAXOBJGRANULES+1)*sizeof(ptr_t),
1742 0 : PTRFREE);
1743 0 : if (result == 0) ABORT("Failed to allocate freelist for new kind");
1744 0 : BZERO(result, (MAXOBJGRANULES+1)*sizeof(ptr_t));
1745 0 : return result;
1746 : }
1747 :
1748 0 : GC_API void ** GC_CALL GC_new_free_list(void)
1749 : {
1750 : void *result;
1751 : DCL_LOCK_STATE;
1752 0 : LOCK();
1753 0 : result = GC_new_free_list_inner();
1754 0 : UNLOCK();
1755 0 : return result;
1756 : }
1757 :
1758 0 : GC_API unsigned GC_CALL GC_new_kind_inner(void **fl, GC_word descr,
1759 : int adjust, int clear)
1760 : {
1761 0 : unsigned result = GC_n_kinds;
1762 :
1763 0 : if (result < MAXOBJKINDS) {
1764 0 : GC_n_kinds++;
1765 0 : GC_obj_kinds[result].ok_freelist = fl;
1766 0 : GC_obj_kinds[result].ok_reclaim_list = 0;
1767 0 : GC_obj_kinds[result].ok_descriptor = descr;
1768 0 : GC_obj_kinds[result].ok_relocate_descr = adjust;
1769 0 : GC_obj_kinds[result].ok_init = (GC_bool)clear;
1770 : # ifdef ENABLE_DISCLAIM
1771 0 : GC_obj_kinds[result].ok_mark_unconditionally = FALSE;
1772 0 : GC_obj_kinds[result].ok_disclaim_proc = 0;
1773 : # endif
1774 : } else {
1775 0 : ABORT("Too many kinds");
1776 : }
1777 0 : return result;
1778 : }
1779 :
1780 0 : GC_API unsigned GC_CALL GC_new_kind(void **fl, GC_word descr, int adjust,
1781 : int clear)
1782 : {
1783 : unsigned result;
1784 : DCL_LOCK_STATE;
1785 0 : LOCK();
1786 0 : result = GC_new_kind_inner(fl, descr, adjust, clear);
1787 0 : UNLOCK();
1788 0 : return result;
1789 : }
1790 :
1791 0 : GC_API unsigned GC_CALL GC_new_proc_inner(GC_mark_proc proc)
1792 : {
1793 0 : unsigned result = GC_n_mark_procs;
1794 :
1795 0 : if (result < MAX_MARK_PROCS) {
1796 0 : GC_n_mark_procs++;
1797 0 : GC_mark_procs[result] = proc;
1798 : } else {
1799 0 : ABORT("Too many mark procedures");
1800 : }
1801 0 : return result;
1802 : }
1803 :
1804 0 : GC_API unsigned GC_CALL GC_new_proc(GC_mark_proc proc)
1805 : {
1806 : unsigned result;
1807 : DCL_LOCK_STATE;
1808 0 : LOCK();
1809 0 : result = GC_new_proc_inner(proc);
1810 0 : UNLOCK();
1811 0 : return result;
1812 : }
1813 :
1814 0 : GC_API void * GC_CALL GC_call_with_alloc_lock(GC_fn_type fn, void *client_data)
1815 : {
1816 : void * result;
1817 : DCL_LOCK_STATE;
1818 :
1819 : # ifdef THREADS
1820 0 : LOCK();
1821 : # endif
1822 0 : result = (*fn)(client_data);
1823 : # ifdef THREADS
1824 0 : UNLOCK();
1825 : # endif
1826 0 : return(result);
1827 : }
1828 :
1829 499 : GC_API void * GC_CALL GC_call_with_stack_base(GC_stack_base_func fn, void *arg)
1830 : {
1831 : struct GC_stack_base base;
1832 : void *result;
1833 :
1834 499 : base.mem_base = (void *)&base;
1835 : # ifdef IA64
1836 : base.reg_base = (void *)GC_save_regs_in_stack();
1837 : /* Unnecessarily flushes register stack, */
1838 : /* but that probably doesn't hurt. */
1839 : # endif
1840 499 : result = fn(&base, arg);
1841 : /* Strongly discourage the compiler from treating the above */
1842 : /* as a tail call. */
1843 151 : GC_noop1((word)(&base));
1844 151 : return result;
1845 : }
1846 :
1847 : #ifndef THREADS
1848 :
1849 : GC_INNER ptr_t GC_blocked_sp = NULL;
1850 : /* NULL value means we are not inside GC_do_blocking() call. */
1851 : # ifdef IA64
1852 : STATIC ptr_t GC_blocked_register_sp = NULL;
1853 : # endif
1854 :
1855 : GC_INNER struct GC_traced_stack_sect_s *GC_traced_stack_sect = NULL;
1856 :
1857 : /* This is nearly the same as in win32_threads.c */
1858 : GC_API void * GC_CALL GC_call_with_gc_active(GC_fn_type fn,
1859 : void * client_data)
1860 : {
1861 : struct GC_traced_stack_sect_s stacksect;
1862 : GC_ASSERT(GC_is_initialized);
1863 :
1864 : /* Adjust our stack base value (this could happen if */
1865 : /* GC_get_main_stack_base() is unimplemented or broken for */
1866 : /* the platform). */
1867 : if ((word)GC_stackbottom HOTTER_THAN (word)(&stacksect))
1868 : GC_stackbottom = (ptr_t)(&stacksect);
1869 :
1870 : if (GC_blocked_sp == NULL) {
1871 : /* We are not inside GC_do_blocking() - do nothing more. */
1872 : client_data = fn(client_data);
1873 : /* Prevent treating the above as a tail call. */
1874 : GC_noop1((word)(&stacksect));
1875 : return client_data; /* result */
1876 : }
1877 :
1878 : /* Setup new "stack section". */
1879 : stacksect.saved_stack_ptr = GC_blocked_sp;
1880 : # ifdef IA64
1881 : /* This is the same as in GC_call_with_stack_base(). */
1882 : stacksect.backing_store_end = GC_save_regs_in_stack();
1883 : /* Unnecessarily flushes register stack, */
1884 : /* but that probably doesn't hurt. */
1885 : stacksect.saved_backing_store_ptr = GC_blocked_register_sp;
1886 : # endif
1887 : stacksect.prev = GC_traced_stack_sect;
1888 : GC_blocked_sp = NULL;
1889 : GC_traced_stack_sect = &stacksect;
1890 :
1891 : client_data = fn(client_data);
1892 : GC_ASSERT(GC_blocked_sp == NULL);
1893 : GC_ASSERT(GC_traced_stack_sect == &stacksect);
1894 :
1895 : /* Restore original "stack section". */
1896 : GC_traced_stack_sect = stacksect.prev;
1897 : # ifdef IA64
1898 : GC_blocked_register_sp = stacksect.saved_backing_store_ptr;
1899 : # endif
1900 : GC_blocked_sp = stacksect.saved_stack_ptr;
1901 :
1902 : return client_data; /* result */
1903 : }
1904 :
1905 : /* This is nearly the same as in win32_threads.c */
1906 : STATIC void GC_do_blocking_inner(ptr_t data, void * context GC_ATTR_UNUSED)
1907 : {
1908 : struct blocking_data * d = (struct blocking_data *) data;
1909 : GC_ASSERT(GC_is_initialized);
1910 : GC_ASSERT(GC_blocked_sp == NULL);
1911 : # ifdef SPARC
1912 : GC_blocked_sp = GC_save_regs_in_stack();
1913 : # else
1914 : GC_blocked_sp = (ptr_t) &d; /* save approx. sp */
1915 : # endif
1916 : # ifdef IA64
1917 : GC_blocked_register_sp = GC_save_regs_in_stack();
1918 : # endif
1919 :
1920 : d -> client_data = (d -> fn)(d -> client_data);
1921 :
1922 : # ifdef SPARC
1923 : GC_ASSERT(GC_blocked_sp != NULL);
1924 : # else
1925 : GC_ASSERT(GC_blocked_sp == (ptr_t) &d);
1926 : # endif
1927 : GC_blocked_sp = NULL;
1928 : }
1929 :
1930 : #endif /* !THREADS */
1931 :
1932 : /* Wrapper for functions that are likely to block (or, at least, do not */
1933 : /* allocate garbage collected memory and/or manipulate pointers to the */
1934 : /* garbage collected heap) for an appreciable length of time. */
1935 : /* In the single threaded case, GC_do_blocking() (together */
1936 : /* with GC_call_with_gc_active()) might be used to make stack scanning */
1937 : /* more precise (i.e. scan only stack frames of functions that allocate */
1938 : /* garbage collected memory and/or manipulate pointers to the garbage */
1939 : /* collected heap). */
1940 0 : GC_API void * GC_CALL GC_do_blocking(GC_fn_type fn, void * client_data)
1941 : {
1942 : struct blocking_data my_data;
1943 :
1944 0 : my_data.fn = fn;
1945 0 : my_data.client_data = client_data;
1946 0 : GC_with_callee_saves_pushed(GC_do_blocking_inner, (ptr_t)(&my_data));
1947 0 : return my_data.client_data; /* result */
1948 : }
1949 :
1950 : #if !defined(NO_DEBUGGING)
1951 0 : GC_API void GC_CALL GC_dump(void)
1952 : {
1953 0 : GC_printf("***Static roots:\n");
1954 0 : GC_print_static_roots();
1955 0 : GC_printf("\n***Heap sections:\n");
1956 0 : GC_print_heap_sects();
1957 0 : GC_printf("\n***Free blocks:\n");
1958 0 : GC_print_hblkfreelist();
1959 0 : GC_printf("\n***Blocks in use:\n");
1960 0 : GC_print_block_list();
1961 0 : }
1962 : #endif /* !NO_DEBUGGING */
1963 :
1964 : /* Getter functions for the public Read-only variables. */
1965 :
1966 : /* GC_get_gc_no() is unsynchronized and should be typically called */
1967 : /* inside the context of GC_call_with_alloc_lock() to prevent data */
1968 : /* races (on multiprocessors). */
1969 0 : GC_API GC_word GC_CALL GC_get_gc_no(void)
1970 : {
1971 0 : return GC_gc_no;
1972 : }
1973 :
1974 : #ifdef THREADS
1975 0 : GC_API int GC_CALL GC_get_parallel(void)
1976 : {
1977 : /* GC_parallel is initialized at start-up. */
1978 0 : return GC_parallel;
1979 : }
1980 : #endif
1981 :
1982 : /* Setter and getter functions for the public R/W function variables. */
1983 : /* These functions are synchronized (like GC_set_warn_proc() and */
1984 : /* GC_get_warn_proc()). */
1985 :
1986 0 : GC_API void GC_CALL GC_set_oom_fn(GC_oom_func fn)
1987 : {
1988 : GC_ASSERT(fn != 0);
1989 : DCL_LOCK_STATE;
1990 0 : LOCK();
1991 0 : GC_oom_fn = fn;
1992 0 : UNLOCK();
1993 0 : }
1994 :
1995 3 : GC_API GC_oom_func GC_CALL GC_get_oom_fn(void)
1996 : {
1997 : GC_oom_func fn;
1998 : DCL_LOCK_STATE;
1999 3 : LOCK();
2000 3 : fn = GC_oom_fn;
2001 3 : UNLOCK();
2002 3 : return fn;
2003 : }
2004 :
2005 0 : GC_API void GC_CALL GC_set_on_heap_resize(GC_on_heap_resize_proc fn)
2006 : {
2007 : /* fn may be 0 (means no event notifier). */
2008 : DCL_LOCK_STATE;
2009 0 : LOCK();
2010 0 : GC_on_heap_resize = fn;
2011 0 : UNLOCK();
2012 0 : }
2013 :
2014 0 : GC_API GC_on_heap_resize_proc GC_CALL GC_get_on_heap_resize(void)
2015 : {
2016 : GC_on_heap_resize_proc fn;
2017 : DCL_LOCK_STATE;
2018 0 : LOCK();
2019 0 : fn = GC_on_heap_resize;
2020 0 : UNLOCK();
2021 0 : return fn;
2022 : }
2023 :
2024 0 : GC_API void GC_CALL GC_set_finalizer_notifier(GC_finalizer_notifier_proc fn)
2025 : {
2026 : /* fn may be 0 (means no finalizer notifier). */
2027 : DCL_LOCK_STATE;
2028 0 : LOCK();
2029 0 : GC_finalizer_notifier = fn;
2030 0 : UNLOCK();
2031 0 : }
2032 :
2033 0 : GC_API GC_finalizer_notifier_proc GC_CALL GC_get_finalizer_notifier(void)
2034 : {
2035 : GC_finalizer_notifier_proc fn;
2036 : DCL_LOCK_STATE;
2037 0 : LOCK();
2038 0 : fn = GC_finalizer_notifier;
2039 0 : UNLOCK();
2040 0 : return fn;
2041 : }
2042 :
2043 : /* Setter and getter functions for the public numeric R/W variables. */
2044 : /* It is safe to call these functions even before GC_INIT(). */
2045 : /* These functions are unsynchronized and should be typically called */
2046 : /* inside the context of GC_call_with_alloc_lock() (if called after */
2047 : /* GC_INIT()) to prevent data races (unless it is guaranteed the */
2048 : /* collector is not multi-threaded at that execution point). */
2049 :
2050 0 : GC_API void GC_CALL GC_set_find_leak(int value)
2051 : {
2052 : /* value is of boolean type. */
2053 0 : GC_find_leak = value;
2054 0 : }
2055 :
2056 0 : GC_API int GC_CALL GC_get_find_leak(void)
2057 : {
2058 0 : return GC_find_leak;
2059 : }
2060 :
2061 0 : GC_API void GC_CALL GC_set_all_interior_pointers(int value)
2062 : {
2063 : DCL_LOCK_STATE;
2064 :
2065 0 : GC_all_interior_pointers = value ? 1 : 0;
2066 0 : if (GC_is_initialized) {
2067 : /* It is not recommended to change GC_all_interior_pointers value */
2068 : /* after GC is initialized but it seems GC could work correctly */
2069 : /* even after switching the mode. */
2070 0 : LOCK();
2071 0 : GC_initialize_offsets(); /* NOTE: this resets manual offsets as well */
2072 0 : if (!GC_all_interior_pointers)
2073 0 : GC_bl_init_no_interiors();
2074 0 : UNLOCK();
2075 : }
2076 0 : }
2077 :
2078 0 : GC_API int GC_CALL GC_get_all_interior_pointers(void)
2079 : {
2080 0 : return GC_all_interior_pointers;
2081 : }
2082 :
2083 0 : GC_API void GC_CALL GC_set_finalize_on_demand(int value)
2084 : {
2085 : GC_ASSERT(value != -1);
2086 : /* value is of boolean type. */
2087 0 : GC_finalize_on_demand = value;
2088 0 : }
2089 :
2090 0 : GC_API int GC_CALL GC_get_finalize_on_demand(void)
2091 : {
2092 0 : return GC_finalize_on_demand;
2093 : }
2094 :
2095 0 : GC_API void GC_CALL GC_set_java_finalization(int value)
2096 : {
2097 : GC_ASSERT(value != -1);
2098 : /* value is of boolean type. */
2099 0 : GC_java_finalization = value;
2100 0 : }
2101 :
2102 0 : GC_API int GC_CALL GC_get_java_finalization(void)
2103 : {
2104 0 : return GC_java_finalization;
2105 : }
2106 :
2107 0 : GC_API void GC_CALL GC_set_dont_expand(int value)
2108 : {
2109 : GC_ASSERT(value != -1);
2110 : /* value is of boolean type. */
2111 0 : GC_dont_expand = value;
2112 0 : }
2113 :
2114 0 : GC_API int GC_CALL GC_get_dont_expand(void)
2115 : {
2116 0 : return GC_dont_expand;
2117 : }
2118 :
2119 0 : GC_API void GC_CALL GC_set_no_dls(int value)
2120 : {
2121 : GC_ASSERT(value != -1);
2122 : /* value is of boolean type. */
2123 0 : GC_no_dls = value;
2124 0 : }
2125 :
2126 0 : GC_API int GC_CALL GC_get_no_dls(void)
2127 : {
2128 0 : return GC_no_dls;
2129 : }
2130 :
2131 0 : GC_API void GC_CALL GC_set_non_gc_bytes(GC_word value)
2132 : {
2133 0 : GC_non_gc_bytes = value;
2134 0 : }
2135 :
2136 0 : GC_API GC_word GC_CALL GC_get_non_gc_bytes(void)
2137 : {
2138 0 : return GC_non_gc_bytes;
2139 : }
2140 :
2141 0 : GC_API void GC_CALL GC_set_free_space_divisor(GC_word value)
2142 : {
2143 : GC_ASSERT(value > 0);
2144 0 : GC_free_space_divisor = value;
2145 0 : }
2146 :
2147 0 : GC_API GC_word GC_CALL GC_get_free_space_divisor(void)
2148 : {
2149 0 : return GC_free_space_divisor;
2150 : }
2151 :
2152 0 : GC_API void GC_CALL GC_set_max_retries(GC_word value)
2153 : {
2154 : GC_ASSERT(value != ~(GC_word)0);
2155 0 : GC_max_retries = value;
2156 0 : }
2157 :
2158 0 : GC_API GC_word GC_CALL GC_get_max_retries(void)
2159 : {
2160 0 : return GC_max_retries;
2161 : }
2162 :
2163 0 : GC_API void GC_CALL GC_set_dont_precollect(int value)
2164 : {
2165 : GC_ASSERT(value != -1);
2166 : /* value is of boolean type. */
2167 0 : GC_dont_precollect = value;
2168 0 : }
2169 :
2170 0 : GC_API int GC_CALL GC_get_dont_precollect(void)
2171 : {
2172 0 : return GC_dont_precollect;
2173 : }
2174 :
2175 0 : GC_API void GC_CALL GC_set_full_freq(int value)
2176 : {
2177 : GC_ASSERT(value >= 0);
2178 0 : GC_full_freq = value;
2179 0 : }
2180 :
2181 0 : GC_API int GC_CALL GC_get_full_freq(void)
2182 : {
2183 0 : return GC_full_freq;
2184 : }
2185 :
2186 0 : GC_API void GC_CALL GC_set_time_limit(unsigned long value)
2187 : {
2188 : GC_ASSERT(value != (unsigned long)-1L);
2189 0 : GC_time_limit = value;
2190 0 : }
2191 :
2192 0 : GC_API unsigned long GC_CALL GC_get_time_limit(void)
2193 : {
2194 0 : return GC_time_limit;
2195 : }
2196 :
2197 0 : GC_API void GC_CALL GC_set_force_unmap_on_gcollect(int value)
2198 : {
2199 0 : GC_force_unmap_on_gcollect = (GC_bool)value;
2200 0 : }
2201 :
2202 0 : GC_API int GC_CALL GC_get_force_unmap_on_gcollect(void)
2203 : {
2204 0 : return (int)GC_force_unmap_on_gcollect;
2205 : }
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