Mercurial > hg > xemacs-beta
annotate src/alloc.c @ 2220:cc6f86c5916d
[xemacs-hg @ 2004-08-15 21:50:27 by viteno]
Update xemacs_extra_name.
| author | viteno |
|---|---|
| date | Sun, 15 Aug 2004 21:50:27 +0000 |
| parents | 9c872f33ecbe |
| children | f913c1545598 |
| rev | line source |
|---|---|
| 428 | 1 /* Storage allocation and gc for XEmacs Lisp interpreter. |
| 2 Copyright (C) 1985-1998 Free Software Foundation, Inc. | |
| 3 Copyright (C) 1995 Sun Microsystems, Inc. | |
| 1265 | 4 Copyright (C) 1995, 1996, 2001, 2002, 2003 Ben Wing. |
| 428 | 5 |
| 6 This file is part of XEmacs. | |
| 7 | |
| 8 XEmacs is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 10 Free Software Foundation; either version 2, or (at your option) any | |
| 11 later version. | |
| 12 | |
| 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with XEmacs; see the file COPYING. If not, write to | |
| 20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 21 Boston, MA 02111-1307, USA. */ | |
| 22 | |
| 23 /* Synched up with: FSF 19.28, Mule 2.0. Substantially different from | |
| 24 FSF. */ | |
| 25 | |
| 26 /* Authorship: | |
| 27 | |
| 28 FSF: Original version; a long time ago. | |
| 29 Mly: Significantly rewritten to use new 3-bit tags and | |
| 30 nicely abstracted object definitions, for 19.8. | |
| 31 JWZ: Improved code to keep track of purespace usage and | |
| 32 issue nice purespace and GC stats. | |
| 33 Ben Wing: Cleaned up frob-block lrecord code, added error-checking | |
| 34 and various changes for Mule, for 19.12. | |
| 35 Added bit vectors for 19.13. | |
| 36 Added lcrecord lists for 19.14. | |
| 37 slb: Lots of work on the purification and dump time code. | |
| 38 Synched Doug Lea malloc support from Emacs 20.2. | |
| 442 | 39 og: Killed the purespace. Portable dumper (moved to dumper.c) |
| 428 | 40 */ |
| 41 | |
| 42 #include <config.h> | |
| 43 #include "lisp.h" | |
| 44 | |
| 45 #include "backtrace.h" | |
| 46 #include "buffer.h" | |
| 47 #include "bytecode.h" | |
| 48 #include "chartab.h" | |
| 49 #include "device.h" | |
| 50 #include "elhash.h" | |
| 51 #include "events.h" | |
| 872 | 52 #include "extents-impl.h" |
| 1204 | 53 #include "file-coding.h" |
| 872 | 54 #include "frame-impl.h" |
| 428 | 55 #include "glyphs.h" |
| 56 #include "opaque.h" | |
| 1204 | 57 #include "lstream.h" |
| 872 | 58 #include "process.h" |
| 1292 | 59 #include "profile.h" |
| 428 | 60 #include "redisplay.h" |
| 61 #include "specifier.h" | |
| 62 #include "sysfile.h" | |
| 442 | 63 #include "sysdep.h" |
| 428 | 64 #include "window.h" |
| 65 #include "console-stream.h" | |
| 66 | |
| 67 #ifdef DOUG_LEA_MALLOC | |
| 68 #include <malloc.h> | |
| 69 #endif | |
| 70 | |
| 71 EXFUN (Fgarbage_collect, 0); | |
| 72 | |
| 814 | 73 static void recompute_need_to_garbage_collect (void); |
| 74 | |
| 428 | 75 #if 0 /* this is _way_ too slow to be part of the standard debug options */ |
| 76 #if defined(DEBUG_XEMACS) && defined(MULE) | |
| 77 #define VERIFY_STRING_CHARS_INTEGRITY | |
| 78 #endif | |
| 79 #endif | |
| 80 | |
| 81 /* Define this to use malloc/free with no freelist for all datatypes, | |
| 82 the hope being that some debugging tools may help detect | |
| 83 freed memory references */ | |
| 84 #ifdef USE_DEBUG_MALLOC /* Taking the above comment at face value -slb */ | |
| 85 #include <dmalloc.h> | |
| 86 #define ALLOC_NO_POOLS | |
| 87 #endif | |
| 88 | |
| 89 #ifdef DEBUG_XEMACS | |
| 458 | 90 static Fixnum debug_allocation; |
| 91 static Fixnum debug_allocation_backtrace_length; | |
| 428 | 92 #endif |
| 93 | |
| 94 /* Number of bytes of consing done since the last gc */ | |
| 814 | 95 static EMACS_INT consing_since_gc; |
| 1292 | 96 EMACS_UINT total_consing; |
| 97 | |
| 814 | 98 int need_to_garbage_collect; |
| 851 | 99 int need_to_check_c_alloca; |
| 887 | 100 int need_to_signal_post_gc; |
| 851 | 101 int funcall_allocation_flag; |
| 102 Bytecount __temp_alloca_size__; | |
| 103 Bytecount funcall_alloca_count; | |
| 814 | 104 |
| 105 /* Determine now whether we need to garbage collect or not, to make | |
| 106 Ffuncall() faster */ | |
| 107 #define INCREMENT_CONS_COUNTER_1(size) \ | |
| 108 do \ | |
| 109 { \ | |
| 110 consing_since_gc += (size); \ | |
| 1292 | 111 total_consing += (size); \ |
| 112 if (profiling_active) \ | |
| 113 profile_record_consing (size); \ | |
| 814 | 114 recompute_need_to_garbage_collect (); \ |
| 115 } while (0) | |
| 428 | 116 |
| 117 #define debug_allocation_backtrace() \ | |
| 118 do { \ | |
| 119 if (debug_allocation_backtrace_length > 0) \ | |
| 120 debug_short_backtrace (debug_allocation_backtrace_length); \ | |
| 121 } while (0) | |
| 122 | |
| 123 #ifdef DEBUG_XEMACS | |
| 801 | 124 #define INCREMENT_CONS_COUNTER(foosize, type) \ |
| 125 do { \ | |
| 126 if (debug_allocation) \ | |
| 127 { \ | |
| 128 stderr_out ("allocating %s (size %ld)\n", type, \ | |
| 129 (long) foosize); \ | |
| 130 debug_allocation_backtrace (); \ | |
| 131 } \ | |
| 132 INCREMENT_CONS_COUNTER_1 (foosize); \ | |
| 428 | 133 } while (0) |
| 134 #define NOSEEUM_INCREMENT_CONS_COUNTER(foosize, type) \ | |
| 135 do { \ | |
| 136 if (debug_allocation > 1) \ | |
| 137 { \ | |
| 801 | 138 stderr_out ("allocating noseeum %s (size %ld)\n", type, \ |
| 139 (long) foosize); \ | |
| 428 | 140 debug_allocation_backtrace (); \ |
| 141 } \ | |
| 142 INCREMENT_CONS_COUNTER_1 (foosize); \ | |
| 143 } while (0) | |
| 144 #else | |
| 145 #define INCREMENT_CONS_COUNTER(size, type) INCREMENT_CONS_COUNTER_1 (size) | |
| 146 #define NOSEEUM_INCREMENT_CONS_COUNTER(size, type) \ | |
| 147 INCREMENT_CONS_COUNTER_1 (size) | |
| 148 #endif | |
| 149 | |
| 150 #define DECREMENT_CONS_COUNTER(size) do { \ | |
| 151 consing_since_gc -= (size); \ | |
| 1292 | 152 total_consing -= (size); \ |
| 153 if (profiling_active) \ | |
| 154 profile_record_unconsing (size); \ | |
| 428 | 155 if (consing_since_gc < 0) \ |
| 156 consing_since_gc = 0; \ | |
| 814 | 157 recompute_need_to_garbage_collect (); \ |
| 428 | 158 } while (0) |
| 159 | |
| 160 /* Number of bytes of consing since gc before another gc should be done. */ | |
| 801 | 161 static EMACS_INT gc_cons_threshold; |
| 162 | |
| 163 /* Percentage of consing of total data size before another GC. */ | |
| 164 static EMACS_INT gc_cons_percentage; | |
| 165 | |
| 166 #ifdef ERROR_CHECK_GC | |
| 853 | 167 int always_gc; /* Debugging hack; equivalent to |
| 168 (setq gc-cons-thresold -1) */ | |
| 801 | 169 #else |
| 170 #define always_gc 0 | |
| 171 #endif | |
| 428 | 172 |
| 173 /* Nonzero during gc */ | |
| 174 int gc_in_progress; | |
| 175 | |
| 1154 | 176 /* Nonzero means display messages at beginning and end of GC. */ |
| 177 | |
| 178 int garbage_collection_messages; | |
| 179 | |
| 428 | 180 /* Number of times GC has happened at this level or below. |
| 181 * Level 0 is most volatile, contrary to usual convention. | |
| 182 * (Of course, there's only one level at present) */ | |
| 183 EMACS_INT gc_generation_number[1]; | |
| 184 | |
| 185 /* This is just for use by the printer, to allow things to print uniquely */ | |
| 186 static int lrecord_uid_counter; | |
| 187 | |
| 188 /* Nonzero when calling certain hooks or doing other things where | |
| 189 a GC would be bad */ | |
| 1957 | 190 int gc_currently_forbidden; |
| 428 | 191 |
| 192 /* Hooks. */ | |
| 193 Lisp_Object Vpre_gc_hook, Qpre_gc_hook; | |
| 194 Lisp_Object Vpost_gc_hook, Qpost_gc_hook; | |
| 195 | |
| 196 /* "Garbage collecting" */ | |
| 197 Lisp_Object Vgc_message; | |
| 198 Lisp_Object Vgc_pointer_glyph; | |
| 771 | 199 static const Char_ASCII gc_default_message[] = "Garbage collecting"; |
| 428 | 200 Lisp_Object Qgarbage_collecting; |
| 201 | |
| 1292 | 202 static Lisp_Object QSin_garbage_collection; |
| 203 | |
| 428 | 204 /* Non-zero means we're in the process of doing the dump */ |
| 205 int purify_flag; | |
| 206 | |
| 1204 | 207 /* Non-zero means we're pdumping out or in */ |
| 208 #ifdef PDUMP | |
| 209 int in_pdump; | |
| 210 #endif | |
| 211 | |
| 800 | 212 #ifdef ERROR_CHECK_TYPES |
| 428 | 213 |
| 793 | 214 Error_Behavior ERROR_ME, ERROR_ME_NOT, ERROR_ME_WARN, ERROR_ME_DEBUG_WARN; |
| 428 | 215 |
| 216 #endif | |
| 217 | |
| 801 | 218 /* Very cheesy ways of figuring out how much memory is being used for |
| 219 data. #### Need better (system-dependent) ways. */ | |
| 220 void *minimum_address_seen; | |
| 221 void *maximum_address_seen; | |
| 222 | |
| 428 | 223 int |
| 224 c_readonly (Lisp_Object obj) | |
| 225 { | |
| 226 return POINTER_TYPE_P (XTYPE (obj)) && C_READONLY (obj); | |
| 227 } | |
| 228 | |
| 229 int | |
| 230 lisp_readonly (Lisp_Object obj) | |
| 231 { | |
| 232 return POINTER_TYPE_P (XTYPE (obj)) && LISP_READONLY (obj); | |
| 233 } | |
| 234 | |
| 235 | |
| 236 /* Maximum amount of C stack to save when a GC happens. */ | |
| 237 | |
| 238 #ifndef MAX_SAVE_STACK | |
| 239 #define MAX_SAVE_STACK 0 /* 16000 */ | |
| 240 #endif | |
| 241 | |
| 242 /* Non-zero means ignore malloc warnings. Set during initialization. */ | |
| 243 int ignore_malloc_warnings; | |
| 244 | |
| 245 | |
| 246 static void *breathing_space; | |
| 247 | |
| 248 void | |
| 249 release_breathing_space (void) | |
| 250 { | |
| 251 if (breathing_space) | |
| 252 { | |
| 253 void *tmp = breathing_space; | |
| 254 breathing_space = 0; | |
| 1726 | 255 xfree (tmp, void *); |
| 428 | 256 } |
| 257 } | |
| 258 | |
| 259 /* malloc calls this if it finds we are near exhausting storage */ | |
| 260 void | |
| 442 | 261 malloc_warning (const char *str) |
| 428 | 262 { |
| 263 if (ignore_malloc_warnings) | |
| 264 return; | |
| 265 | |
| 266 warn_when_safe | |
| 793 | 267 (Qmemory, Qemergency, |
| 428 | 268 "%s\n" |
| 269 "Killing some buffers may delay running out of memory.\n" | |
| 270 "However, certainly by the time you receive the 95%% warning,\n" | |
| 271 "you should clean up, kill this Emacs, and start a new one.", | |
| 272 str); | |
| 273 } | |
| 274 | |
| 275 /* Called if malloc returns zero */ | |
| 276 DOESNT_RETURN | |
| 277 memory_full (void) | |
| 278 { | |
| 279 /* Force a GC next time eval is called. | |
| 280 It's better to loop garbage-collecting (we might reclaim enough | |
| 281 to win) than to loop beeping and barfing "Memory exhausted" | |
| 282 */ | |
| 283 consing_since_gc = gc_cons_threshold + 1; | |
| 814 | 284 recompute_need_to_garbage_collect (); |
| 428 | 285 release_breathing_space (); |
| 286 | |
| 287 /* Flush some histories which might conceivably contain garbalogical | |
| 288 inhibitors. */ | |
| 289 if (!NILP (Fboundp (Qvalues))) | |
| 290 Fset (Qvalues, Qnil); | |
| 291 Vcommand_history = Qnil; | |
| 292 | |
| 563 | 293 out_of_memory ("Memory exhausted", Qunbound); |
| 428 | 294 } |
| 295 | |
| 801 | 296 static void |
| 297 set_alloc_mins_and_maxes (void *val, Bytecount size) | |
| 298 { | |
| 299 if (!val) | |
| 300 return; | |
| 301 if ((char *) val + size > (char *) maximum_address_seen) | |
| 302 maximum_address_seen = (char *) val + size; | |
| 303 if (!minimum_address_seen) | |
| 304 minimum_address_seen = | |
| 305 #if SIZEOF_VOID_P == 8 | |
| 306 (void *) 0xFFFFFFFFFFFFFFFF; | |
| 307 #else | |
| 308 (void *) 0xFFFFFFFF; | |
| 309 #endif | |
| 310 if ((char *) val < (char *) minimum_address_seen) | |
| 311 minimum_address_seen = (char *) val; | |
| 312 } | |
| 313 | |
| 314 /* like malloc and realloc but check for no memory left. */ | |
| 428 | 315 |
| 1315 | 316 #ifdef ERROR_CHECK_MALLOC |
| 1292 | 317 static int in_malloc; |
| 1333 | 318 extern int regex_malloc_disallowed; |
| 1315 | 319 #endif |
| 1292 | 320 |
| 428 | 321 #undef xmalloc |
| 322 void * | |
| 665 | 323 xmalloc (Bytecount size) |
| 428 | 324 { |
| 1292 | 325 void *val; |
| 326 #ifdef ERROR_CHECK_MALLOC | |
| 327 assert (!in_malloc); | |
| 1333 | 328 assert (!regex_malloc_disallowed); |
| 1292 | 329 in_malloc = 1; |
| 330 #endif | |
| 331 val = malloc (size); | |
| 332 #ifdef ERROR_CHECK_MALLOC | |
| 333 in_malloc = 0; | |
| 334 #endif | |
| 428 | 335 if (!val && (size != 0)) memory_full (); |
| 801 | 336 set_alloc_mins_and_maxes (val, size); |
| 428 | 337 return val; |
| 338 } | |
| 339 | |
| 340 #undef xcalloc | |
| 341 static void * | |
| 665 | 342 xcalloc (Elemcount nelem, Bytecount elsize) |
| 428 | 343 { |
| 1292 | 344 void *val; |
| 345 #ifdef ERROR_CHECK_MALLOC | |
| 346 assert (!in_malloc); | |
| 1333 | 347 assert (!regex_malloc_disallowed); |
| 1292 | 348 in_malloc = 1; |
| 349 #endif | |
| 350 val= calloc (nelem, elsize); | |
| 351 #ifdef ERROR_CHECK_MALLOC | |
| 352 in_malloc = 0; | |
| 353 #endif | |
| 428 | 354 |
| 355 if (!val && (nelem != 0)) memory_full (); | |
| 801 | 356 set_alloc_mins_and_maxes (val, nelem * elsize); |
| 428 | 357 return val; |
| 358 } | |
| 359 | |
| 360 void * | |
| 665 | 361 xmalloc_and_zero (Bytecount size) |
| 428 | 362 { |
| 363 return xcalloc (size, sizeof (char)); | |
| 364 } | |
| 365 | |
| 366 #undef xrealloc | |
| 367 void * | |
| 665 | 368 xrealloc (void *block, Bytecount size) |
| 428 | 369 { |
| 1292 | 370 #ifdef ERROR_CHECK_MALLOC |
| 371 assert (!in_malloc); | |
| 1333 | 372 assert (!regex_malloc_disallowed); |
| 1292 | 373 in_malloc = 1; |
| 374 #endif | |
| 551 | 375 block = realloc (block, size); |
| 1292 | 376 #ifdef ERROR_CHECK_MALLOC |
| 377 in_malloc = 0; | |
| 378 #endif | |
| 551 | 379 |
| 380 if (!block && (size != 0)) memory_full (); | |
| 801 | 381 set_alloc_mins_and_maxes (block, size); |
| 551 | 382 return block; |
| 428 | 383 } |
| 384 | |
| 385 void | |
| 386 xfree_1 (void *block) | |
| 387 { | |
| 388 #ifdef ERROR_CHECK_MALLOC | |
| 389 /* Unbelievably, calling free() on 0xDEADBEEF doesn't cause an | |
| 390 error until much later on for many system mallocs, such as | |
| 391 the one that comes with Solaris 2.3. FMH!! */ | |
| 392 assert (block != (void *) 0xDEADBEEF); | |
| 393 assert (block); | |
| 1292 | 394 assert (!in_malloc); |
| 1333 | 395 assert (!regex_malloc_disallowed); |
| 1292 | 396 in_malloc = 1; |
| 428 | 397 #endif /* ERROR_CHECK_MALLOC */ |
| 398 free (block); | |
| 1292 | 399 #ifdef ERROR_CHECK_MALLOC |
| 400 in_malloc = 0; | |
| 401 #endif | |
| 428 | 402 } |
| 403 | |
| 404 #ifdef ERROR_CHECK_GC | |
| 405 | |
| 406 static void | |
| 665 | 407 deadbeef_memory (void *ptr, Bytecount size) |
| 428 | 408 { |
| 826 | 409 UINT_32_BIT *ptr4 = (UINT_32_BIT *) ptr; |
| 665 | 410 Bytecount beefs = size >> 2; |
| 428 | 411 |
| 412 /* In practice, size will always be a multiple of four. */ | |
| 413 while (beefs--) | |
| 1204 | 414 (*ptr4++) = 0xDEADBEEF; /* -559038737 base 10 */ |
| 428 | 415 } |
| 416 | |
| 417 #else /* !ERROR_CHECK_GC */ | |
| 418 | |
| 419 | |
| 420 #define deadbeef_memory(ptr, size) | |
| 421 | |
| 422 #endif /* !ERROR_CHECK_GC */ | |
| 423 | |
| 424 #undef xstrdup | |
| 425 char * | |
| 442 | 426 xstrdup (const char *str) |
| 428 | 427 { |
| 428 int len = strlen (str) + 1; /* for stupid terminating 0 */ | |
| 429 void *val = xmalloc (len); | |
| 771 | 430 |
| 428 | 431 if (val == 0) return 0; |
| 432 return (char *) memcpy (val, str, len); | |
| 433 } | |
| 434 | |
| 435 #ifdef NEED_STRDUP | |
| 436 char * | |
| 442 | 437 strdup (const char *s) |
| 428 | 438 { |
| 439 return xstrdup (s); | |
| 440 } | |
| 441 #endif /* NEED_STRDUP */ | |
| 442 | |
| 443 | |
| 444 static void * | |
| 665 | 445 allocate_lisp_storage (Bytecount size) |
| 428 | 446 { |
| 793 | 447 void *val = xmalloc (size); |
| 448 /* We don't increment the cons counter anymore. Calling functions do | |
| 449 that now because we have two different kinds of cons counters -- one | |
| 450 for normal objects, and one for no-see-um conses (and possibly others | |
| 451 similar) where the conses are used totally internally, never escape, | |
| 452 and are created and then freed and shouldn't logically increment the | |
| 453 cons counting. #### (Or perhaps, we should decrement it when an object | |
| 454 get freed?) */ | |
| 455 | |
| 456 /* But we do now (as of 3-27-02) go and zero out the memory. This is a | |
| 457 good thing, as it will guarantee we won't get any intermittent bugs | |
| 1204 | 458 coming from an uninitiated field. The speed loss is unnoticeable, |
| 459 esp. as the objects are not large -- large stuff like buffer text and | |
| 460 redisplay structures are allocated separately. */ | |
| 793 | 461 memset (val, 0, size); |
| 851 | 462 |
| 463 if (need_to_check_c_alloca) | |
| 464 xemacs_c_alloca (0); | |
| 465 | |
| 793 | 466 return val; |
| 428 | 467 } |
| 468 | |
| 469 | |
| 442 | 470 /* lcrecords are chained together through their "next" field. |
| 471 After doing the mark phase, GC will walk this linked list | |
| 472 and free any lcrecord which hasn't been marked. */ | |
| 428 | 473 static struct lcrecord_header *all_lcrecords; |
| 474 | |
| 1204 | 475 /* The most basic of the lcrecord allocation functions. Not usually called |
| 476 directly. Allocates an lrecord not managed by any lcrecord-list, of a | |
| 477 specified size. See lrecord.h. */ | |
| 478 | |
| 428 | 479 void * |
| 1204 | 480 basic_alloc_lcrecord (Bytecount size, |
| 481 const struct lrecord_implementation *implementation) | |
| 428 | 482 { |
| 483 struct lcrecord_header *lcheader; | |
| 484 | |
| 442 | 485 type_checking_assert |
| 486 ((implementation->static_size == 0 ? | |
| 487 implementation->size_in_bytes_method != NULL : | |
| 488 implementation->static_size == size) | |
| 489 && | |
| 490 (! implementation->basic_p) | |
| 491 && | |
| 492 (! (implementation->hash == NULL && implementation->equal != NULL))); | |
| 428 | 493 |
| 494 lcheader = (struct lcrecord_header *) allocate_lisp_storage (size); | |
| 442 | 495 set_lheader_implementation (&lcheader->lheader, implementation); |
| 428 | 496 lcheader->next = all_lcrecords; |
| 497 #if 1 /* mly prefers to see small ID numbers */ | |
| 498 lcheader->uid = lrecord_uid_counter++; | |
| 499 #else /* jwz prefers to see real addrs */ | |
| 500 lcheader->uid = (int) &lcheader; | |
| 501 #endif | |
| 502 lcheader->free = 0; | |
| 503 all_lcrecords = lcheader; | |
| 504 INCREMENT_CONS_COUNTER (size, implementation->name); | |
| 505 return lcheader; | |
| 506 } | |
| 507 | |
| 508 #if 0 /* Presently unused */ | |
| 509 /* Very, very poor man's EGC? | |
| 510 * This may be slow and thrash pages all over the place. | |
| 511 * Only call it if you really feel you must (and if the | |
| 512 * lrecord was fairly recently allocated). | |
| 513 * Otherwise, just let the GC do its job -- that's what it's there for | |
| 514 */ | |
| 515 void | |
| 771 | 516 very_old_free_lcrecord (struct lcrecord_header *lcrecord) |
| 428 | 517 { |
| 518 if (all_lcrecords == lcrecord) | |
| 519 { | |
| 520 all_lcrecords = lcrecord->next; | |
| 521 } | |
| 522 else | |
| 523 { | |
| 524 struct lrecord_header *header = all_lcrecords; | |
| 525 for (;;) | |
| 526 { | |
| 527 struct lrecord_header *next = header->next; | |
| 528 if (next == lcrecord) | |
| 529 { | |
| 530 header->next = lrecord->next; | |
| 531 break; | |
| 532 } | |
| 533 else if (next == 0) | |
| 534 abort (); | |
| 535 else | |
| 536 header = next; | |
| 537 } | |
| 538 } | |
| 539 if (lrecord->implementation->finalizer) | |
| 540 lrecord->implementation->finalizer (lrecord, 0); | |
| 541 xfree (lrecord); | |
| 542 return; | |
| 543 } | |
| 544 #endif /* Unused */ | |
| 545 | |
| 546 | |
| 547 static void | |
| 548 disksave_object_finalization_1 (void) | |
| 549 { | |
| 550 struct lcrecord_header *header; | |
| 551 | |
| 552 for (header = all_lcrecords; header; header = header->next) | |
| 553 { | |
| 442 | 554 if (LHEADER_IMPLEMENTATION (&header->lheader)->finalizer && |
| 428 | 555 !header->free) |
| 442 | 556 LHEADER_IMPLEMENTATION (&header->lheader)->finalizer (header, 1); |
| 428 | 557 } |
| 558 } | |
| 559 | |
| 1204 | 560 /* Bitwise copy all parts of a Lisp object other than the header */ |
| 561 | |
| 562 void | |
| 563 copy_lisp_object (Lisp_Object dst, Lisp_Object src) | |
| 564 { | |
| 565 const struct lrecord_implementation *imp = | |
| 566 XRECORD_LHEADER_IMPLEMENTATION (src); | |
| 567 Bytecount size = lisp_object_size (src); | |
| 568 | |
| 569 assert (imp == XRECORD_LHEADER_IMPLEMENTATION (dst)); | |
| 570 assert (size == lisp_object_size (dst)); | |
| 571 | |
| 572 if (imp->basic_p) | |
| 573 memcpy ((char *) XRECORD_LHEADER (dst) + sizeof (struct lrecord_header), | |
| 574 (char *) XRECORD_LHEADER (src) + sizeof (struct lrecord_header), | |
| 575 size - sizeof (struct lrecord_header)); | |
| 576 else | |
| 577 memcpy ((char *) XRECORD_LHEADER (dst) + sizeof (struct lcrecord_header), | |
| 578 (char *) XRECORD_LHEADER (src) + sizeof (struct lcrecord_header), | |
| 579 size - sizeof (struct lcrecord_header)); | |
| 580 } | |
| 581 | |
| 428 | 582 |
| 583 /************************************************************************/ | |
| 584 /* Debugger support */ | |
| 585 /************************************************************************/ | |
| 586 /* Give gdb/dbx enough information to decode Lisp Objects. We make | |
| 587 sure certain symbols are always defined, so gdb doesn't complain | |
| 438 | 588 about expressions in src/.gdbinit. See src/.gdbinit or src/.dbxrc |
| 589 to see how this is used. */ | |
| 428 | 590 |
| 458 | 591 EMACS_UINT dbg_valmask = ((1UL << VALBITS) - 1) << GCBITS; |
| 592 EMACS_UINT dbg_typemask = (1UL << GCTYPEBITS) - 1; | |
| 428 | 593 |
| 594 #ifdef USE_UNION_TYPE | |
| 458 | 595 unsigned char dbg_USE_UNION_TYPE = 1; |
| 428 | 596 #else |
| 458 | 597 unsigned char dbg_USE_UNION_TYPE = 0; |
| 428 | 598 #endif |
| 599 | |
| 458 | 600 unsigned char dbg_valbits = VALBITS; |
| 601 unsigned char dbg_gctypebits = GCTYPEBITS; | |
| 602 | |
| 603 /* On some systems, the above definitions will be optimized away by | |
| 604 the compiler or linker unless they are referenced in some function. */ | |
| 605 long dbg_inhibit_dbg_symbol_deletion (void); | |
| 606 long | |
| 607 dbg_inhibit_dbg_symbol_deletion (void) | |
| 608 { | |
| 609 return | |
| 610 (dbg_valmask + | |
| 611 dbg_typemask + | |
| 612 dbg_USE_UNION_TYPE + | |
| 613 dbg_valbits + | |
| 614 dbg_gctypebits); | |
| 615 } | |
| 428 | 616 |
| 617 /* Macros turned into functions for ease of debugging. | |
| 618 Debuggers don't know about macros! */ | |
| 619 int dbg_eq (Lisp_Object obj1, Lisp_Object obj2); | |
| 620 int | |
| 621 dbg_eq (Lisp_Object obj1, Lisp_Object obj2) | |
| 622 { | |
| 623 return EQ (obj1, obj2); | |
| 624 } | |
| 625 | |
| 626 | |
| 627 /************************************************************************/ | |
| 628 /* Fixed-size type macros */ | |
| 629 /************************************************************************/ | |
| 630 | |
| 631 /* For fixed-size types that are commonly used, we malloc() large blocks | |
| 632 of memory at a time and subdivide them into chunks of the correct | |
| 633 size for an object of that type. This is more efficient than | |
| 634 malloc()ing each object separately because we save on malloc() time | |
| 635 and overhead due to the fewer number of malloc()ed blocks, and | |
| 636 also because we don't need any extra pointers within each object | |
| 637 to keep them threaded together for GC purposes. For less common | |
| 638 (and frequently large-size) types, we use lcrecords, which are | |
| 639 malloc()ed individually and chained together through a pointer | |
| 640 in the lcrecord header. lcrecords do not need to be fixed-size | |
| 641 (i.e. two objects of the same type need not have the same size; | |
| 642 however, the size of a particular object cannot vary dynamically). | |
| 643 It is also much easier to create a new lcrecord type because no | |
| 644 additional code needs to be added to alloc.c. Finally, lcrecords | |
| 645 may be more efficient when there are only a small number of them. | |
| 646 | |
| 647 The types that are stored in these large blocks (or "frob blocks") | |
| 1983 | 648 are cons, all number types except fixnum, compiled-function, symbol, |
| 649 marker, extent, event, and string. | |
| 428 | 650 |
| 651 Note that strings are special in that they are actually stored in | |
| 652 two parts: a structure containing information about the string, and | |
| 653 the actual data associated with the string. The former structure | |
| 654 (a struct Lisp_String) is a fixed-size structure and is managed the | |
| 655 same way as all the other such types. This structure contains a | |
| 656 pointer to the actual string data, which is stored in structures of | |
| 657 type struct string_chars_block. Each string_chars_block consists | |
| 658 of a pointer to a struct Lisp_String, followed by the data for that | |
| 440 | 659 string, followed by another pointer to a Lisp_String, followed by |
| 660 the data for that string, etc. At GC time, the data in these | |
| 661 blocks is compacted by searching sequentially through all the | |
| 428 | 662 blocks and compressing out any holes created by unmarked strings. |
| 663 Strings that are more than a certain size (bigger than the size of | |
| 664 a string_chars_block, although something like half as big might | |
| 665 make more sense) are malloc()ed separately and not stored in | |
| 666 string_chars_blocks. Furthermore, no one string stretches across | |
| 667 two string_chars_blocks. | |
| 668 | |
| 1204 | 669 Vectors are each malloc()ed separately as lcrecords. |
| 428 | 670 |
| 671 In the following discussion, we use conses, but it applies equally | |
| 672 well to the other fixed-size types. | |
| 673 | |
| 674 We store cons cells inside of cons_blocks, allocating a new | |
| 675 cons_block with malloc() whenever necessary. Cons cells reclaimed | |
| 676 by GC are put on a free list to be reallocated before allocating | |
| 677 any new cons cells from the latest cons_block. Each cons_block is | |
| 678 just under 2^n - MALLOC_OVERHEAD bytes long, since malloc (at least | |
| 679 the versions in malloc.c and gmalloc.c) really allocates in units | |
| 680 of powers of two and uses 4 bytes for its own overhead. | |
| 681 | |
| 682 What GC actually does is to search through all the cons_blocks, | |
| 683 from the most recently allocated to the oldest, and put all | |
| 684 cons cells that are not marked (whether or not they're already | |
| 685 free) on a cons_free_list. The cons_free_list is a stack, and | |
| 686 so the cons cells in the oldest-allocated cons_block end up | |
| 687 at the head of the stack and are the first to be reallocated. | |
| 688 If any cons_block is entirely free, it is freed with free() | |
| 689 and its cons cells removed from the cons_free_list. Because | |
| 690 the cons_free_list ends up basically in memory order, we have | |
| 691 a high locality of reference (assuming a reasonable turnover | |
| 692 of allocating and freeing) and have a reasonable probability | |
| 693 of entirely freeing up cons_blocks that have been more recently | |
| 694 allocated. This stage is called the "sweep stage" of GC, and | |
| 695 is executed after the "mark stage", which involves starting | |
| 696 from all places that are known to point to in-use Lisp objects | |
| 697 (e.g. the obarray, where are all symbols are stored; the | |
| 698 current catches and condition-cases; the backtrace list of | |
| 699 currently executing functions; the gcpro list; etc.) and | |
| 700 recursively marking all objects that are accessible. | |
| 701 | |
| 454 | 702 At the beginning of the sweep stage, the conses in the cons blocks |
| 703 are in one of three states: in use and marked, in use but not | |
| 704 marked, and not in use (already freed). Any conses that are marked | |
| 705 have been marked in the mark stage just executed, because as part | |
| 706 of the sweep stage we unmark any marked objects. The way we tell | |
| 707 whether or not a cons cell is in use is through the LRECORD_FREE_P | |
| 708 macro. This uses a special lrecord type `lrecord_type_free', | |
| 709 which is never associated with any valid object. | |
| 710 | |
| 711 Conses on the free_cons_list are threaded through a pointer stored | |
| 712 in the conses themselves. Because the cons is still in a | |
| 713 cons_block and needs to remain marked as not in use for the next | |
| 714 time that GC happens, we need room to store both the "free" | |
| 715 indicator and the chaining pointer. So this pointer is stored | |
| 716 after the lrecord header (actually where C places a pointer after | |
| 717 the lrecord header; they are not necessarily contiguous). This | |
| 718 implies that all fixed-size types must be big enough to contain at | |
| 719 least one pointer. This is true for all current fixed-size types, | |
| 720 with the possible exception of Lisp_Floats, for which we define the | |
| 721 meat of the struct using a union of a pointer and a double to | |
| 722 ensure adequate space for the free list chain pointer. | |
| 428 | 723 |
| 724 Some types of objects need additional "finalization" done | |
| 725 when an object is converted from in use to not in use; | |
| 726 this is the purpose of the ADDITIONAL_FREE_type macro. | |
| 727 For example, markers need to be removed from the chain | |
| 728 of markers that is kept in each buffer. This is because | |
| 729 markers in a buffer automatically disappear if the marker | |
| 730 is no longer referenced anywhere (the same does not | |
| 731 apply to extents, however). | |
| 732 | |
| 733 WARNING: Things are in an extremely bizarre state when | |
| 734 the ADDITIONAL_FREE_type macros are called, so beware! | |
| 735 | |
| 454 | 736 When ERROR_CHECK_GC is defined, we do things differently so as to |
| 737 maximize our chances of catching places where there is insufficient | |
| 738 GCPROing. The thing we want to avoid is having an object that | |
| 739 we're using but didn't GCPRO get freed by GC and then reallocated | |
| 740 while we're in the process of using it -- this will result in | |
| 741 something seemingly unrelated getting trashed, and is extremely | |
| 742 difficult to track down. If the object gets freed but not | |
| 743 reallocated, we can usually catch this because we set most of the | |
| 744 bytes of a freed object to 0xDEADBEEF. (The lisp object type is set | |
| 745 to the invalid type `lrecord_type_free', however, and a pointer | |
| 746 used to chain freed objects together is stored after the lrecord | |
| 747 header; we play some tricks with this pointer to make it more | |
| 428 | 748 bogus, so crashes are more likely to occur right away.) |
| 749 | |
| 750 We want freed objects to stay free as long as possible, | |
| 751 so instead of doing what we do above, we maintain the | |
| 752 free objects in a first-in first-out queue. We also | |
| 753 don't recompute the free list each GC, unlike above; | |
| 754 this ensures that the queue ordering is preserved. | |
| 755 [This means that we are likely to have worse locality | |
| 756 of reference, and that we can never free a frob block | |
| 757 once it's allocated. (Even if we know that all cells | |
| 758 in it are free, there's no easy way to remove all those | |
| 759 cells from the free list because the objects on the | |
| 760 free list are unlikely to be in memory order.)] | |
| 761 Furthermore, we never take objects off the free list | |
| 762 unless there's a large number (usually 1000, but | |
| 763 varies depending on type) of them already on the list. | |
| 764 This way, we ensure that an object that gets freed will | |
| 765 remain free for the next 1000 (or whatever) times that | |
| 440 | 766 an object of that type is allocated. */ |
| 428 | 767 |
| 768 #ifndef MALLOC_OVERHEAD | |
| 769 #ifdef GNU_MALLOC | |
| 770 #define MALLOC_OVERHEAD 0 | |
| 771 #elif defined (rcheck) | |
| 772 #define MALLOC_OVERHEAD 20 | |
| 773 #else | |
| 774 #define MALLOC_OVERHEAD 8 | |
| 775 #endif | |
| 776 #endif /* MALLOC_OVERHEAD */ | |
| 777 | |
| 778 #if !defined(HAVE_MMAP) || defined(DOUG_LEA_MALLOC) | |
| 779 /* If we released our reserve (due to running out of memory), | |
| 780 and we have a fair amount free once again, | |
| 781 try to set aside another reserve in case we run out once more. | |
| 782 | |
| 783 This is called when a relocatable block is freed in ralloc.c. */ | |
| 784 void refill_memory_reserve (void); | |
| 785 void | |
| 442 | 786 refill_memory_reserve (void) |
| 428 | 787 { |
| 788 if (breathing_space == 0) | |
| 789 breathing_space = (char *) malloc (4096 - MALLOC_OVERHEAD); | |
| 790 } | |
| 791 #endif | |
| 792 | |
| 793 #ifdef ALLOC_NO_POOLS | |
| 794 # define TYPE_ALLOC_SIZE(type, structtype) 1 | |
| 795 #else | |
| 796 # define TYPE_ALLOC_SIZE(type, structtype) \ | |
| 797 ((2048 - MALLOC_OVERHEAD - sizeof (struct type##_block *)) \ | |
| 798 / sizeof (structtype)) | |
| 799 #endif /* ALLOC_NO_POOLS */ | |
| 800 | |
| 801 #define DECLARE_FIXED_TYPE_ALLOC(type, structtype) \ | |
| 802 \ | |
| 803 struct type##_block \ | |
| 804 { \ | |
| 805 struct type##_block *prev; \ | |
| 806 structtype block[TYPE_ALLOC_SIZE (type, structtype)]; \ | |
| 807 }; \ | |
| 808 \ | |
| 809 static struct type##_block *current_##type##_block; \ | |
| 810 static int current_##type##_block_index; \ | |
| 811 \ | |
| 454 | 812 static Lisp_Free *type##_free_list; \ |
| 813 static Lisp_Free *type##_free_list_tail; \ | |
| 428 | 814 \ |
| 815 static void \ | |
| 816 init_##type##_alloc (void) \ | |
| 817 { \ | |
| 818 current_##type##_block = 0; \ | |
| 819 current_##type##_block_index = \ | |
| 820 countof (current_##type##_block->block); \ | |
| 821 type##_free_list = 0; \ | |
| 822 type##_free_list_tail = 0; \ | |
| 823 } \ | |
| 824 \ | |
| 825 static int gc_count_num_##type##_in_use; \ | |
| 826 static int gc_count_num_##type##_freelist | |
| 827 | |
| 828 #define ALLOCATE_FIXED_TYPE_FROM_BLOCK(type, result) do { \ | |
| 829 if (current_##type##_block_index \ | |
| 830 == countof (current_##type##_block->block)) \ | |
| 831 { \ | |
| 832 struct type##_block *AFTFB_new = (struct type##_block *) \ | |
| 833 allocate_lisp_storage (sizeof (struct type##_block)); \ | |
| 834 AFTFB_new->prev = current_##type##_block; \ | |
| 835 current_##type##_block = AFTFB_new; \ | |
| 836 current_##type##_block_index = 0; \ | |
| 837 } \ | |
| 838 (result) = \ | |
| 839 &(current_##type##_block->block[current_##type##_block_index++]); \ | |
| 840 } while (0) | |
| 841 | |
| 842 /* Allocate an instance of a type that is stored in blocks. | |
| 843 TYPE is the "name" of the type, STRUCTTYPE is the corresponding | |
| 844 structure type. */ | |
| 845 | |
| 846 #ifdef ERROR_CHECK_GC | |
| 847 | |
| 848 /* Note: if you get crashes in this function, suspect incorrect calls | |
| 849 to free_cons() and friends. This happened once because the cons | |
| 850 cell was not GC-protected and was getting collected before | |
| 851 free_cons() was called. */ | |
| 852 | |
| 454 | 853 #define ALLOCATE_FIXED_TYPE_1(type, structtype, result) do { \ |
| 854 if (gc_count_num_##type##_freelist > \ | |
| 855 MINIMUM_ALLOWED_FIXED_TYPE_CELLS_##type) \ | |
| 856 { \ | |
| 857 result = (structtype *) type##_free_list; \ | |
| 1204 | 858 assert (LRECORD_FREE_P (result)); \ |
| 859 /* Before actually using the chain pointer, we complement \ | |
| 860 all its bits; see PUT_FIXED_TYPE_ON_FREE_LIST(). */ \ | |
| 454 | 861 type##_free_list = (Lisp_Free *) \ |
| 862 (~ (EMACS_UINT) (type##_free_list->chain)); \ | |
| 863 gc_count_num_##type##_freelist--; \ | |
| 864 } \ | |
| 865 else \ | |
| 866 ALLOCATE_FIXED_TYPE_FROM_BLOCK (type, result); \ | |
| 867 MARK_LRECORD_AS_NOT_FREE (result); \ | |
| 428 | 868 } while (0) |
| 869 | |
| 870 #else /* !ERROR_CHECK_GC */ | |
| 871 | |
| 454 | 872 #define ALLOCATE_FIXED_TYPE_1(type, structtype, result) do { \ |
| 428 | 873 if (type##_free_list) \ |
| 874 { \ | |
| 454 | 875 result = (structtype *) type##_free_list; \ |
| 876 type##_free_list = type##_free_list->chain; \ | |
| 428 | 877 } \ |
| 878 else \ | |
| 879 ALLOCATE_FIXED_TYPE_FROM_BLOCK (type, result); \ | |
| 454 | 880 MARK_LRECORD_AS_NOT_FREE (result); \ |
| 428 | 881 } while (0) |
| 882 | |
| 883 #endif /* !ERROR_CHECK_GC */ | |
| 884 | |
| 454 | 885 |
| 428 | 886 #define ALLOCATE_FIXED_TYPE(type, structtype, result) \ |
| 887 do \ | |
| 888 { \ | |
| 889 ALLOCATE_FIXED_TYPE_1 (type, structtype, result); \ | |
| 890 INCREMENT_CONS_COUNTER (sizeof (structtype), #type); \ | |
| 891 } while (0) | |
| 892 | |
| 893 #define NOSEEUM_ALLOCATE_FIXED_TYPE(type, structtype, result) \ | |
| 894 do \ | |
| 895 { \ | |
| 896 ALLOCATE_FIXED_TYPE_1 (type, structtype, result); \ | |
| 897 NOSEEUM_INCREMENT_CONS_COUNTER (sizeof (structtype), #type); \ | |
| 898 } while (0) | |
| 899 | |
| 454 | 900 |
| 901 /* Lisp_Free is the type to represent a free list member inside a frob | |
| 902 block of any lisp object type. */ | |
| 903 typedef struct Lisp_Free | |
| 904 { | |
| 905 struct lrecord_header lheader; | |
| 906 struct Lisp_Free *chain; | |
| 907 } Lisp_Free; | |
| 908 | |
| 909 #define LRECORD_FREE_P(ptr) \ | |
| 771 | 910 (((struct lrecord_header *) ptr)->type == lrecord_type_free) |
| 454 | 911 |
| 912 #define MARK_LRECORD_AS_FREE(ptr) \ | |
| 771 | 913 ((void) (((struct lrecord_header *) ptr)->type = lrecord_type_free)) |
| 454 | 914 |
| 915 #ifdef ERROR_CHECK_GC | |
| 916 #define MARK_LRECORD_AS_NOT_FREE(ptr) \ | |
| 771 | 917 ((void) (((struct lrecord_header *) ptr)->type = lrecord_type_undefined)) |
| 428 | 918 #else |
| 454 | 919 #define MARK_LRECORD_AS_NOT_FREE(ptr) DO_NOTHING |
| 428 | 920 #endif |
| 921 | |
| 922 #ifdef ERROR_CHECK_GC | |
| 923 | |
| 454 | 924 #define PUT_FIXED_TYPE_ON_FREE_LIST(type, structtype, ptr) do { \ |
| 925 if (type##_free_list_tail) \ | |
| 926 { \ | |
| 927 /* When we store the chain pointer, we complement all \ | |
| 928 its bits; this should significantly increase its \ | |
| 929 bogosity in case someone tries to use the value, and \ | |
| 930 should make us crash faster if someone overwrites the \ | |
| 931 pointer because when it gets un-complemented in \ | |
| 932 ALLOCATED_FIXED_TYPE(), the resulting pointer will be \ | |
| 933 extremely bogus. */ \ | |
| 934 type##_free_list_tail->chain = \ | |
| 935 (Lisp_Free *) ~ (EMACS_UINT) (ptr); \ | |
| 936 } \ | |
| 937 else \ | |
| 938 type##_free_list = (Lisp_Free *) (ptr); \ | |
| 939 type##_free_list_tail = (Lisp_Free *) (ptr); \ | |
| 940 } while (0) | |
| 428 | 941 |
| 942 #else /* !ERROR_CHECK_GC */ | |
| 943 | |
| 454 | 944 #define PUT_FIXED_TYPE_ON_FREE_LIST(type, structtype, ptr) do { \ |
| 945 ((Lisp_Free *) (ptr))->chain = type##_free_list; \ | |
| 946 type##_free_list = (Lisp_Free *) (ptr); \ | |
| 947 } while (0) \ | |
| 428 | 948 |
| 949 #endif /* !ERROR_CHECK_GC */ | |
| 950 | |
| 951 /* TYPE and STRUCTTYPE are the same as in ALLOCATE_FIXED_TYPE(). */ | |
| 952 | |
| 953 #define FREE_FIXED_TYPE(type, structtype, ptr) do { \ | |
| 954 structtype *FFT_ptr = (ptr); \ | |
| 1204 | 955 gc_checking_assert (!LRECORD_FREE_P (FFT_ptr)); \ |
| 428 | 956 ADDITIONAL_FREE_##type (FFT_ptr); \ |
| 957 deadbeef_memory (FFT_ptr, sizeof (structtype)); \ | |
| 958 PUT_FIXED_TYPE_ON_FREE_LIST (type, structtype, FFT_ptr); \ | |
| 454 | 959 MARK_LRECORD_AS_FREE (FFT_ptr); \ |
| 428 | 960 } while (0) |
| 961 | |
| 962 /* Like FREE_FIXED_TYPE() but used when we are explicitly | |
| 963 freeing a structure through free_cons(), free_marker(), etc. | |
| 964 rather than through the normal process of sweeping. | |
| 965 We attempt to undo the changes made to the allocation counters | |
| 966 as a result of this structure being allocated. This is not | |
| 967 completely necessary but helps keep things saner: e.g. this way, | |
| 968 repeatedly allocating and freeing a cons will not result in | |
| 969 the consing-since-gc counter advancing, which would cause a GC | |
| 1204 | 970 and somewhat defeat the purpose of explicitly freeing. |
| 971 | |
| 972 We also disable this mechanism entirely when ALLOC_NO_POOLS is | |
| 973 set, which is used for Purify and the like. */ | |
| 974 | |
| 975 #ifndef ALLOC_NO_POOLS | |
| 428 | 976 #define FREE_FIXED_TYPE_WHEN_NOT_IN_GC(type, structtype, ptr) \ |
| 977 do { FREE_FIXED_TYPE (type, structtype, ptr); \ | |
| 978 DECREMENT_CONS_COUNTER (sizeof (structtype)); \ | |
| 979 gc_count_num_##type##_freelist++; \ | |
| 980 } while (0) | |
| 1204 | 981 #else |
| 982 #define FREE_FIXED_TYPE_WHEN_NOT_IN_GC(type, structtype, ptr) | |
| 983 #endif | |
| 428 | 984 |
| 985 | |
| 986 | |
| 987 /************************************************************************/ | |
| 988 /* Cons allocation */ | |
| 989 /************************************************************************/ | |
| 990 | |
| 440 | 991 DECLARE_FIXED_TYPE_ALLOC (cons, Lisp_Cons); |
| 428 | 992 /* conses are used and freed so often that we set this really high */ |
| 993 /* #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_cons 20000 */ | |
| 994 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_cons 2000 | |
| 995 | |
| 996 static Lisp_Object | |
| 997 mark_cons (Lisp_Object obj) | |
| 998 { | |
| 999 if (NILP (XCDR (obj))) | |
| 1000 return XCAR (obj); | |
| 1001 | |
| 1002 mark_object (XCAR (obj)); | |
| 1003 return XCDR (obj); | |
| 1004 } | |
| 1005 | |
| 1006 static int | |
| 1007 cons_equal (Lisp_Object ob1, Lisp_Object ob2, int depth) | |
| 1008 { | |
| 442 | 1009 depth++; |
| 1010 while (internal_equal (XCAR (ob1), XCAR (ob2), depth)) | |
| 428 | 1011 { |
| 1012 ob1 = XCDR (ob1); | |
| 1013 ob2 = XCDR (ob2); | |
| 1014 if (! CONSP (ob1) || ! CONSP (ob2)) | |
| 442 | 1015 return internal_equal (ob1, ob2, depth); |
| 428 | 1016 } |
| 1017 return 0; | |
| 1018 } | |
| 1019 | |
| 1204 | 1020 static const struct memory_description cons_description[] = { |
| 853 | 1021 { XD_LISP_OBJECT, offsetof (Lisp_Cons, car_) }, |
| 1022 { XD_LISP_OBJECT, offsetof (Lisp_Cons, cdr_) }, | |
| 428 | 1023 { XD_END } |
| 1024 }; | |
| 1025 | |
| 934 | 1026 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("cons", cons, |
| 1027 1, /*dumpable-flag*/ | |
| 1028 mark_cons, print_cons, 0, | |
| 1029 cons_equal, | |
| 1030 /* | |
| 1031 * No `hash' method needed. | |
| 1032 * internal_hash knows how to | |
| 1033 * handle conses. | |
| 1034 */ | |
| 1035 0, | |
| 1036 cons_description, | |
| 1037 Lisp_Cons); | |
| 428 | 1038 |
| 1039 DEFUN ("cons", Fcons, 2, 2, 0, /* | |
| 1040 Create a new cons, give it CAR and CDR as components, and return it. | |
| 1041 */ | |
| 1042 (car, cdr)) | |
| 1043 { | |
| 1044 /* This cannot GC. */ | |
| 1045 Lisp_Object val; | |
| 440 | 1046 Lisp_Cons *c; |
| 1047 | |
| 1048 ALLOCATE_FIXED_TYPE (cons, Lisp_Cons, c); | |
| 442 | 1049 set_lheader_implementation (&c->lheader, &lrecord_cons); |
| 793 | 1050 val = wrap_cons (c); |
| 853 | 1051 XSETCAR (val, car); |
| 1052 XSETCDR (val, cdr); | |
| 428 | 1053 return val; |
| 1054 } | |
| 1055 | |
| 1056 /* This is identical to Fcons() but it used for conses that we're | |
| 1057 going to free later, and is useful when trying to track down | |
| 1058 "real" consing. */ | |
| 1059 Lisp_Object | |
| 1060 noseeum_cons (Lisp_Object car, Lisp_Object cdr) | |
| 1061 { | |
| 1062 Lisp_Object val; | |
| 440 | 1063 Lisp_Cons *c; |
| 1064 | |
| 1065 NOSEEUM_ALLOCATE_FIXED_TYPE (cons, Lisp_Cons, c); | |
| 442 | 1066 set_lheader_implementation (&c->lheader, &lrecord_cons); |
| 793 | 1067 val = wrap_cons (c); |
| 428 | 1068 XCAR (val) = car; |
| 1069 XCDR (val) = cdr; | |
| 1070 return val; | |
| 1071 } | |
| 1072 | |
| 1073 DEFUN ("list", Flist, 0, MANY, 0, /* | |
| 1074 Return a newly created list with specified arguments as elements. | |
| 1075 Any number of arguments, even zero arguments, are allowed. | |
| 1076 */ | |
| 1077 (int nargs, Lisp_Object *args)) | |
| 1078 { | |
| 1079 Lisp_Object val = Qnil; | |
| 1080 Lisp_Object *argp = args + nargs; | |
| 1081 | |
| 1082 while (argp > args) | |
| 1083 val = Fcons (*--argp, val); | |
| 1084 return val; | |
| 1085 } | |
| 1086 | |
| 1087 Lisp_Object | |
| 1088 list1 (Lisp_Object obj0) | |
| 1089 { | |
| 1090 /* This cannot GC. */ | |
| 1091 return Fcons (obj0, Qnil); | |
| 1092 } | |
| 1093 | |
| 1094 Lisp_Object | |
| 1095 list2 (Lisp_Object obj0, Lisp_Object obj1) | |
| 1096 { | |
| 1097 /* This cannot GC. */ | |
| 1098 return Fcons (obj0, Fcons (obj1, Qnil)); | |
| 1099 } | |
| 1100 | |
| 1101 Lisp_Object | |
| 1102 list3 (Lisp_Object obj0, Lisp_Object obj1, Lisp_Object obj2) | |
| 1103 { | |
| 1104 /* This cannot GC. */ | |
| 1105 return Fcons (obj0, Fcons (obj1, Fcons (obj2, Qnil))); | |
| 1106 } | |
| 1107 | |
| 1108 Lisp_Object | |
| 1109 cons3 (Lisp_Object obj0, Lisp_Object obj1, Lisp_Object obj2) | |
| 1110 { | |
| 1111 /* This cannot GC. */ | |
| 1112 return Fcons (obj0, Fcons (obj1, obj2)); | |
| 1113 } | |
| 1114 | |
| 1115 Lisp_Object | |
| 1116 acons (Lisp_Object key, Lisp_Object value, Lisp_Object alist) | |
| 1117 { | |
| 1118 return Fcons (Fcons (key, value), alist); | |
| 1119 } | |
| 1120 | |
| 1121 Lisp_Object | |
| 1122 list4 (Lisp_Object obj0, Lisp_Object obj1, Lisp_Object obj2, Lisp_Object obj3) | |
| 1123 { | |
| 1124 /* This cannot GC. */ | |
| 1125 return Fcons (obj0, Fcons (obj1, Fcons (obj2, Fcons (obj3, Qnil)))); | |
| 1126 } | |
| 1127 | |
| 1128 Lisp_Object | |
| 1129 list5 (Lisp_Object obj0, Lisp_Object obj1, Lisp_Object obj2, Lisp_Object obj3, | |
| 1130 Lisp_Object obj4) | |
| 1131 { | |
| 1132 /* This cannot GC. */ | |
| 1133 return Fcons (obj0, Fcons (obj1, Fcons (obj2, Fcons (obj3, Fcons (obj4, Qnil))))); | |
| 1134 } | |
| 1135 | |
| 1136 Lisp_Object | |
| 1137 list6 (Lisp_Object obj0, Lisp_Object obj1, Lisp_Object obj2, Lisp_Object obj3, | |
| 1138 Lisp_Object obj4, Lisp_Object obj5) | |
| 1139 { | |
| 1140 /* This cannot GC. */ | |
| 1141 return Fcons (obj0, Fcons (obj1, Fcons (obj2, Fcons (obj3, Fcons (obj4, Fcons (obj5, Qnil)))))); | |
| 1142 } | |
| 1143 | |
| 1144 DEFUN ("make-list", Fmake_list, 2, 2, 0, /* | |
| 444 | 1145 Return a new list of length LENGTH, with each element being OBJECT. |
| 428 | 1146 */ |
| 444 | 1147 (length, object)) |
| 428 | 1148 { |
| 1149 CHECK_NATNUM (length); | |
| 1150 | |
| 1151 { | |
| 1152 Lisp_Object val = Qnil; | |
| 647 | 1153 EMACS_INT size = XINT (length); |
| 428 | 1154 |
| 1155 while (size--) | |
| 444 | 1156 val = Fcons (object, val); |
| 428 | 1157 return val; |
| 1158 } | |
| 1159 } | |
| 1160 | |
| 1161 | |
| 1162 /************************************************************************/ | |
| 1163 /* Float allocation */ | |
| 1164 /************************************************************************/ | |
| 1165 | |
| 1983 | 1166 /*** With enhanced number support, these are short floats */ |
| 1167 | |
| 440 | 1168 DECLARE_FIXED_TYPE_ALLOC (float, Lisp_Float); |
| 428 | 1169 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_float 1000 |
| 1170 | |
| 1171 Lisp_Object | |
| 1172 make_float (double float_value) | |
| 1173 { | |
| 440 | 1174 Lisp_Float *f; |
| 1175 | |
| 1176 ALLOCATE_FIXED_TYPE (float, Lisp_Float, f); | |
| 1177 | |
| 1178 /* Avoid dump-time `uninitialized memory read' purify warnings. */ | |
| 1179 if (sizeof (struct lrecord_header) + sizeof (double) != sizeof (*f)) | |
| 1180 xzero (*f); | |
| 1181 | |
| 442 | 1182 set_lheader_implementation (&f->lheader, &lrecord_float); |
| 428 | 1183 float_data (f) = float_value; |
| 793 | 1184 return wrap_float (f); |
| 428 | 1185 } |
| 1186 | |
| 1187 | |
| 1188 /************************************************************************/ | |
| 1983 | 1189 /* Enhanced number allocation */ |
| 1190 /************************************************************************/ | |
| 1191 | |
| 1192 /*** Bignum ***/ | |
| 1193 #ifdef HAVE_BIGNUM | |
| 1194 DECLARE_FIXED_TYPE_ALLOC (bignum, Lisp_Bignum); | |
| 1195 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_bignum 250 | |
| 1196 | |
| 1197 /* WARNING: This function returns a bignum even if its argument fits into a | |
| 1198 fixnum. See Fcanonicalize_number(). */ | |
| 1199 Lisp_Object | |
| 1200 make_bignum (long bignum_value) | |
| 1201 { | |
| 1202 Lisp_Bignum *b; | |
| 1203 | |
| 1204 ALLOCATE_FIXED_TYPE (bignum, Lisp_Bignum, b); | |
| 1205 set_lheader_implementation (&b->lheader, &lrecord_bignum); | |
| 1206 bignum_init (bignum_data (b)); | |
| 1207 bignum_set_long (bignum_data (b), bignum_value); | |
| 1208 return wrap_bignum (b); | |
| 1209 } | |
| 1210 | |
| 1211 /* WARNING: This function returns a bignum even if its argument fits into a | |
| 1212 fixnum. See Fcanonicalize_number(). */ | |
| 1213 Lisp_Object | |
| 1214 make_bignum_bg (bignum bg) | |
| 1215 { | |
| 1216 Lisp_Bignum *b; | |
| 1217 | |
| 1218 ALLOCATE_FIXED_TYPE (bignum, Lisp_Bignum, b); | |
| 1219 set_lheader_implementation (&b->lheader, &lrecord_bignum); | |
| 1220 bignum_init (bignum_data (b)); | |
| 1221 bignum_set (bignum_data (b), bg); | |
| 1222 return wrap_bignum (b); | |
| 1223 } | |
| 1224 #endif /* HAVE_BIGNUM */ | |
| 1225 | |
| 1226 /*** Ratio ***/ | |
| 1227 #ifdef HAVE_RATIO | |
| 1228 DECLARE_FIXED_TYPE_ALLOC (ratio, Lisp_Ratio); | |
| 1229 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_ratio 250 | |
| 1230 | |
| 1231 Lisp_Object | |
| 1232 make_ratio (long numerator, unsigned long denominator) | |
| 1233 { | |
| 1234 Lisp_Ratio *r; | |
| 1235 | |
| 1236 ALLOCATE_FIXED_TYPE (ratio, Lisp_Ratio, r); | |
| 1237 set_lheader_implementation (&r->lheader, &lrecord_ratio); | |
| 1238 ratio_init (ratio_data (r)); | |
| 1239 ratio_set_long_ulong (ratio_data (r), numerator, denominator); | |
| 1240 ratio_canonicalize (ratio_data (r)); | |
| 1241 return wrap_ratio (r); | |
| 1242 } | |
| 1243 | |
| 1244 Lisp_Object | |
| 1245 make_ratio_bg (bignum numerator, bignum denominator) | |
| 1246 { | |
| 1247 Lisp_Ratio *r; | |
| 1248 | |
| 1249 ALLOCATE_FIXED_TYPE (ratio, Lisp_Ratio, r); | |
| 1250 set_lheader_implementation (&r->lheader, &lrecord_ratio); | |
| 1251 ratio_init (ratio_data (r)); | |
| 1252 ratio_set_bignum_bignum (ratio_data (r), numerator, denominator); | |
| 1253 ratio_canonicalize (ratio_data (r)); | |
| 1254 return wrap_ratio (r); | |
| 1255 } | |
| 1256 | |
| 1257 Lisp_Object | |
| 1258 make_ratio_rt (ratio rat) | |
| 1259 { | |
| 1260 Lisp_Ratio *r; | |
| 1261 | |
| 1262 ALLOCATE_FIXED_TYPE (ratio, Lisp_Ratio, r); | |
| 1263 set_lheader_implementation (&r->lheader, &lrecord_ratio); | |
| 1264 ratio_init (ratio_data (r)); | |
| 1265 ratio_set (ratio_data (r), rat); | |
| 1266 return wrap_ratio (r); | |
| 1267 } | |
| 1268 #endif /* HAVE_RATIO */ | |
| 1269 | |
| 1270 /*** Bigfloat ***/ | |
| 1271 #ifdef HAVE_BIGFLOAT | |
| 1272 DECLARE_FIXED_TYPE_ALLOC (bigfloat, Lisp_Bigfloat); | |
| 1273 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_bigfloat 250 | |
| 1274 | |
| 1275 /* This function creates a bigfloat with the default precision if the | |
| 1276 PRECISION argument is zero. */ | |
| 1277 Lisp_Object | |
| 1278 make_bigfloat (double float_value, unsigned long precision) | |
| 1279 { | |
| 1280 Lisp_Bigfloat *f; | |
| 1281 | |
| 1282 ALLOCATE_FIXED_TYPE (bigfloat, Lisp_Bigfloat, f); | |
| 1283 set_lheader_implementation (&f->lheader, &lrecord_bigfloat); | |
| 1284 if (precision == 0UL) | |
| 1285 bigfloat_init (bigfloat_data (f)); | |
| 1286 else | |
| 1287 bigfloat_init_prec (bigfloat_data (f), precision); | |
| 1288 bigfloat_set_double (bigfloat_data (f), float_value); | |
| 1289 return wrap_bigfloat (f); | |
| 1290 } | |
| 1291 | |
| 1292 /* This function creates a bigfloat with the precision of its argument */ | |
| 1293 Lisp_Object | |
| 1294 make_bigfloat_bf (bigfloat float_value) | |
| 1295 { | |
| 1296 Lisp_Bigfloat *f; | |
| 1297 | |
| 1298 ALLOCATE_FIXED_TYPE (bigfloat, Lisp_Bigfloat, f); | |
| 1299 set_lheader_implementation (&f->lheader, &lrecord_bigfloat); | |
| 1300 bigfloat_init_prec (bigfloat_data (f), bigfloat_get_prec (float_value)); | |
| 1301 bigfloat_set (bigfloat_data (f), float_value); | |
| 1302 return wrap_bigfloat (f); | |
| 1303 } | |
| 1304 #endif /* HAVE_BIGFLOAT */ | |
| 1305 | |
| 1306 /************************************************************************/ | |
| 428 | 1307 /* Vector allocation */ |
| 1308 /************************************************************************/ | |
| 1309 | |
| 1310 static Lisp_Object | |
| 1311 mark_vector (Lisp_Object obj) | |
| 1312 { | |
| 1313 Lisp_Vector *ptr = XVECTOR (obj); | |
| 1314 int len = vector_length (ptr); | |
| 1315 int i; | |
| 1316 | |
| 1317 for (i = 0; i < len - 1; i++) | |
| 1318 mark_object (ptr->contents[i]); | |
| 1319 return (len > 0) ? ptr->contents[len - 1] : Qnil; | |
| 1320 } | |
| 1321 | |
| 665 | 1322 static Bytecount |
| 442 | 1323 size_vector (const void *lheader) |
| 428 | 1324 { |
| 456 | 1325 return FLEXIBLE_ARRAY_STRUCT_SIZEOF (Lisp_Vector, Lisp_Object, contents, |
| 442 | 1326 ((Lisp_Vector *) lheader)->size); |
| 428 | 1327 } |
| 1328 | |
| 1329 static int | |
| 1330 vector_equal (Lisp_Object obj1, Lisp_Object obj2, int depth) | |
| 1331 { | |
| 1332 int len = XVECTOR_LENGTH (obj1); | |
| 1333 if (len != XVECTOR_LENGTH (obj2)) | |
| 1334 return 0; | |
| 1335 | |
| 1336 { | |
| 1337 Lisp_Object *ptr1 = XVECTOR_DATA (obj1); | |
| 1338 Lisp_Object *ptr2 = XVECTOR_DATA (obj2); | |
| 1339 while (len--) | |
| 1340 if (!internal_equal (*ptr1++, *ptr2++, depth + 1)) | |
| 1341 return 0; | |
| 1342 } | |
| 1343 return 1; | |
| 1344 } | |
| 1345 | |
| 665 | 1346 static Hashcode |
| 442 | 1347 vector_hash (Lisp_Object obj, int depth) |
| 1348 { | |
| 1349 return HASH2 (XVECTOR_LENGTH (obj), | |
| 1350 internal_array_hash (XVECTOR_DATA (obj), | |
| 1351 XVECTOR_LENGTH (obj), | |
| 1352 depth + 1)); | |
| 1353 } | |
| 1354 | |
| 1204 | 1355 static const struct memory_description vector_description[] = { |
| 440 | 1356 { XD_LONG, offsetof (Lisp_Vector, size) }, |
| 1357 { XD_LISP_OBJECT_ARRAY, offsetof (Lisp_Vector, contents), XD_INDIRECT(0, 0) }, | |
| 428 | 1358 { XD_END } |
| 1359 }; | |
| 1360 | |
| 1204 | 1361 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("vector", vector, |
| 1362 1, /*dumpable-flag*/ | |
| 1363 mark_vector, print_vector, 0, | |
| 1364 vector_equal, | |
| 1365 vector_hash, | |
| 1366 vector_description, | |
| 1367 size_vector, Lisp_Vector); | |
| 428 | 1368 /* #### should allocate `small' vectors from a frob-block */ |
| 1369 static Lisp_Vector * | |
| 665 | 1370 make_vector_internal (Elemcount sizei) |
| 428 | 1371 { |
| 1204 | 1372 /* no `next' field; we use lcrecords */ |
| 665 | 1373 Bytecount sizem = FLEXIBLE_ARRAY_STRUCT_SIZEOF (Lisp_Vector, Lisp_Object, |
| 1204 | 1374 contents, sizei); |
| 1375 Lisp_Vector *p = | |
| 1376 (Lisp_Vector *) basic_alloc_lcrecord (sizem, &lrecord_vector); | |
| 428 | 1377 |
| 1378 p->size = sizei; | |
| 1379 return p; | |
| 1380 } | |
| 1381 | |
| 1382 Lisp_Object | |
| 665 | 1383 make_vector (Elemcount length, Lisp_Object object) |
| 428 | 1384 { |
| 1385 Lisp_Vector *vecp = make_vector_internal (length); | |
| 1386 Lisp_Object *p = vector_data (vecp); | |
| 1387 | |
| 1388 while (length--) | |
| 444 | 1389 *p++ = object; |
| 428 | 1390 |
| 793 | 1391 return wrap_vector (vecp); |
| 428 | 1392 } |
| 1393 | |
| 1394 DEFUN ("make-vector", Fmake_vector, 2, 2, 0, /* | |
| 444 | 1395 Return a new vector of length LENGTH, with each element being OBJECT. |
| 428 | 1396 See also the function `vector'. |
| 1397 */ | |
| 444 | 1398 (length, object)) |
| 428 | 1399 { |
| 1400 CONCHECK_NATNUM (length); | |
| 444 | 1401 return make_vector (XINT (length), object); |
| 428 | 1402 } |
| 1403 | |
| 1404 DEFUN ("vector", Fvector, 0, MANY, 0, /* | |
| 1405 Return a newly created vector with specified arguments as elements. | |
| 1406 Any number of arguments, even zero arguments, are allowed. | |
| 1407 */ | |
| 1408 (int nargs, Lisp_Object *args)) | |
| 1409 { | |
| 1410 Lisp_Vector *vecp = make_vector_internal (nargs); | |
| 1411 Lisp_Object *p = vector_data (vecp); | |
| 1412 | |
| 1413 while (nargs--) | |
| 1414 *p++ = *args++; | |
| 1415 | |
| 793 | 1416 return wrap_vector (vecp); |
| 428 | 1417 } |
| 1418 | |
| 1419 Lisp_Object | |
| 1420 vector1 (Lisp_Object obj0) | |
| 1421 { | |
| 1422 return Fvector (1, &obj0); | |
| 1423 } | |
| 1424 | |
| 1425 Lisp_Object | |
| 1426 vector2 (Lisp_Object obj0, Lisp_Object obj1) | |
| 1427 { | |
| 1428 Lisp_Object args[2]; | |
| 1429 args[0] = obj0; | |
| 1430 args[1] = obj1; | |
| 1431 return Fvector (2, args); | |
| 1432 } | |
| 1433 | |
| 1434 Lisp_Object | |
| 1435 vector3 (Lisp_Object obj0, Lisp_Object obj1, Lisp_Object obj2) | |
| 1436 { | |
| 1437 Lisp_Object args[3]; | |
| 1438 args[0] = obj0; | |
| 1439 args[1] = obj1; | |
| 1440 args[2] = obj2; | |
| 1441 return Fvector (3, args); | |
| 1442 } | |
| 1443 | |
| 1444 #if 0 /* currently unused */ | |
| 1445 | |
| 1446 Lisp_Object | |
| 1447 vector4 (Lisp_Object obj0, Lisp_Object obj1, Lisp_Object obj2, | |
| 1448 Lisp_Object obj3) | |
| 1449 { | |
| 1450 Lisp_Object args[4]; | |
| 1451 args[0] = obj0; | |
| 1452 args[1] = obj1; | |
| 1453 args[2] = obj2; | |
| 1454 args[3] = obj3; | |
| 1455 return Fvector (4, args); | |
| 1456 } | |
| 1457 | |
| 1458 Lisp_Object | |
| 1459 vector5 (Lisp_Object obj0, Lisp_Object obj1, Lisp_Object obj2, | |
| 1460 Lisp_Object obj3, Lisp_Object obj4) | |
| 1461 { | |
| 1462 Lisp_Object args[5]; | |
| 1463 args[0] = obj0; | |
| 1464 args[1] = obj1; | |
| 1465 args[2] = obj2; | |
| 1466 args[3] = obj3; | |
| 1467 args[4] = obj4; | |
| 1468 return Fvector (5, args); | |
| 1469 } | |
| 1470 | |
| 1471 Lisp_Object | |
| 1472 vector6 (Lisp_Object obj0, Lisp_Object obj1, Lisp_Object obj2, | |
| 1473 Lisp_Object obj3, Lisp_Object obj4, Lisp_Object obj5) | |
| 1474 { | |
| 1475 Lisp_Object args[6]; | |
| 1476 args[0] = obj0; | |
| 1477 args[1] = obj1; | |
| 1478 args[2] = obj2; | |
| 1479 args[3] = obj3; | |
| 1480 args[4] = obj4; | |
| 1481 args[5] = obj5; | |
| 1482 return Fvector (6, args); | |
| 1483 } | |
| 1484 | |
| 1485 Lisp_Object | |
| 1486 vector7 (Lisp_Object obj0, Lisp_Object obj1, Lisp_Object obj2, | |
| 1487 Lisp_Object obj3, Lisp_Object obj4, Lisp_Object obj5, | |
| 1488 Lisp_Object obj6) | |
| 1489 { | |
| 1490 Lisp_Object args[7]; | |
| 1491 args[0] = obj0; | |
| 1492 args[1] = obj1; | |
| 1493 args[2] = obj2; | |
| 1494 args[3] = obj3; | |
| 1495 args[4] = obj4; | |
| 1496 args[5] = obj5; | |
| 1497 args[6] = obj6; | |
| 1498 return Fvector (7, args); | |
| 1499 } | |
| 1500 | |
| 1501 Lisp_Object | |
| 1502 vector8 (Lisp_Object obj0, Lisp_Object obj1, Lisp_Object obj2, | |
| 1503 Lisp_Object obj3, Lisp_Object obj4, Lisp_Object obj5, | |
| 1504 Lisp_Object obj6, Lisp_Object obj7) | |
| 1505 { | |
| 1506 Lisp_Object args[8]; | |
| 1507 args[0] = obj0; | |
| 1508 args[1] = obj1; | |
| 1509 args[2] = obj2; | |
| 1510 args[3] = obj3; | |
| 1511 args[4] = obj4; | |
| 1512 args[5] = obj5; | |
| 1513 args[6] = obj6; | |
| 1514 args[7] = obj7; | |
| 1515 return Fvector (8, args); | |
| 1516 } | |
| 1517 #endif /* unused */ | |
| 1518 | |
| 1519 /************************************************************************/ | |
| 1520 /* Bit Vector allocation */ | |
| 1521 /************************************************************************/ | |
| 1522 | |
| 1523 /* #### should allocate `small' bit vectors from a frob-block */ | |
| 440 | 1524 static Lisp_Bit_Vector * |
| 665 | 1525 make_bit_vector_internal (Elemcount sizei) |
| 428 | 1526 { |
| 1204 | 1527 /* no `next' field; we use lcrecords */ |
| 665 | 1528 Elemcount num_longs = BIT_VECTOR_LONG_STORAGE (sizei); |
| 1529 Bytecount sizem = FLEXIBLE_ARRAY_STRUCT_SIZEOF (Lisp_Bit_Vector, | |
| 1204 | 1530 unsigned long, |
| 1531 bits, num_longs); | |
| 1532 Lisp_Bit_Vector *p = (Lisp_Bit_Vector *) | |
| 1533 basic_alloc_lcrecord (sizem, &lrecord_bit_vector); | |
| 428 | 1534 |
| 1535 bit_vector_length (p) = sizei; | |
| 1536 return p; | |
| 1537 } | |
| 1538 | |
| 1539 Lisp_Object | |
| 665 | 1540 make_bit_vector (Elemcount length, Lisp_Object bit) |
| 428 | 1541 { |
| 440 | 1542 Lisp_Bit_Vector *p = make_bit_vector_internal (length); |
| 665 | 1543 Elemcount num_longs = BIT_VECTOR_LONG_STORAGE (length); |
| 428 | 1544 |
| 444 | 1545 CHECK_BIT (bit); |
| 1546 | |
| 1547 if (ZEROP (bit)) | |
| 428 | 1548 memset (p->bits, 0, num_longs * sizeof (long)); |
| 1549 else | |
| 1550 { | |
| 665 | 1551 Elemcount bits_in_last = length & (LONGBITS_POWER_OF_2 - 1); |
| 428 | 1552 memset (p->bits, ~0, num_longs * sizeof (long)); |
| 1553 /* But we have to make sure that the unused bits in the | |
| 1554 last long are 0, so that equal/hash is easy. */ | |
| 1555 if (bits_in_last) | |
| 1556 p->bits[num_longs - 1] &= (1 << bits_in_last) - 1; | |
| 1557 } | |
| 1558 | |
| 793 | 1559 return wrap_bit_vector (p); |
| 428 | 1560 } |
| 1561 | |
| 1562 Lisp_Object | |
| 665 | 1563 make_bit_vector_from_byte_vector (unsigned char *bytevec, Elemcount length) |
| 428 | 1564 { |
| 665 | 1565 Elemcount i; |
| 428 | 1566 Lisp_Bit_Vector *p = make_bit_vector_internal (length); |
| 1567 | |
| 1568 for (i = 0; i < length; i++) | |
| 1569 set_bit_vector_bit (p, i, bytevec[i]); | |
| 1570 | |
| 793 | 1571 return wrap_bit_vector (p); |
| 428 | 1572 } |
| 1573 | |
| 1574 DEFUN ("make-bit-vector", Fmake_bit_vector, 2, 2, 0, /* | |
| 444 | 1575 Return a new bit vector of length LENGTH. with each bit set to BIT. |
| 1576 BIT must be one of the integers 0 or 1. See also the function `bit-vector'. | |
| 428 | 1577 */ |
| 444 | 1578 (length, bit)) |
| 428 | 1579 { |
| 1580 CONCHECK_NATNUM (length); | |
| 1581 | |
| 444 | 1582 return make_bit_vector (XINT (length), bit); |
| 428 | 1583 } |
| 1584 | |
| 1585 DEFUN ("bit-vector", Fbit_vector, 0, MANY, 0, /* | |
| 1586 Return a newly created bit vector with specified arguments as elements. | |
| 1587 Any number of arguments, even zero arguments, are allowed. | |
| 444 | 1588 Each argument must be one of the integers 0 or 1. |
| 428 | 1589 */ |
| 1590 (int nargs, Lisp_Object *args)) | |
| 1591 { | |
| 1592 int i; | |
| 1593 Lisp_Bit_Vector *p = make_bit_vector_internal (nargs); | |
| 1594 | |
| 1595 for (i = 0; i < nargs; i++) | |
| 1596 { | |
| 1597 CHECK_BIT (args[i]); | |
| 1598 set_bit_vector_bit (p, i, !ZEROP (args[i])); | |
| 1599 } | |
| 1600 | |
| 793 | 1601 return wrap_bit_vector (p); |
| 428 | 1602 } |
| 1603 | |
| 1604 | |
| 1605 /************************************************************************/ | |
| 1606 /* Compiled-function allocation */ | |
| 1607 /************************************************************************/ | |
| 1608 | |
| 1609 DECLARE_FIXED_TYPE_ALLOC (compiled_function, Lisp_Compiled_Function); | |
| 1610 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_compiled_function 1000 | |
| 1611 | |
| 1612 static Lisp_Object | |
| 1613 make_compiled_function (void) | |
| 1614 { | |
| 1615 Lisp_Compiled_Function *f; | |
| 1616 | |
| 1617 ALLOCATE_FIXED_TYPE (compiled_function, Lisp_Compiled_Function, f); | |
| 442 | 1618 set_lheader_implementation (&f->lheader, &lrecord_compiled_function); |
| 428 | 1619 |
| 1620 f->stack_depth = 0; | |
| 1621 f->specpdl_depth = 0; | |
| 1622 f->flags.documentationp = 0; | |
| 1623 f->flags.interactivep = 0; | |
| 1624 f->flags.domainp = 0; /* I18N3 */ | |
| 1625 f->instructions = Qzero; | |
| 1626 f->constants = Qzero; | |
| 1627 f->arglist = Qnil; | |
| 1739 | 1628 f->args = NULL; |
| 1629 f->max_args = f->min_args = f->args_in_array = 0; | |
| 428 | 1630 f->doc_and_interactive = Qnil; |
| 1631 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 1632 f->annotated = Qnil; | |
| 1633 #endif | |
| 793 | 1634 return wrap_compiled_function (f); |
| 428 | 1635 } |
| 1636 | |
| 1637 DEFUN ("make-byte-code", Fmake_byte_code, 4, MANY, 0, /* | |
| 1638 Return a new compiled-function object. | |
| 1639 Usage: (arglist instructions constants stack-depth | |
| 1640 &optional doc-string interactive) | |
| 1641 Note that, unlike all other emacs-lisp functions, calling this with five | |
| 1642 arguments is NOT the same as calling it with six arguments, the last of | |
| 1643 which is nil. If the INTERACTIVE arg is specified as nil, then that means | |
| 1644 that this function was defined with `(interactive)'. If the arg is not | |
| 1645 specified, then that means the function is not interactive. | |
| 1646 This is terrible behavior which is retained for compatibility with old | |
| 1647 `.elc' files which expect these semantics. | |
| 1648 */ | |
| 1649 (int nargs, Lisp_Object *args)) | |
| 1650 { | |
| 1651 /* In a non-insane world this function would have this arglist... | |
| 1652 (arglist instructions constants stack_depth &optional doc_string interactive) | |
| 1653 */ | |
| 1654 Lisp_Object fun = make_compiled_function (); | |
| 1655 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun); | |
| 1656 | |
| 1657 Lisp_Object arglist = args[0]; | |
| 1658 Lisp_Object instructions = args[1]; | |
| 1659 Lisp_Object constants = args[2]; | |
| 1660 Lisp_Object stack_depth = args[3]; | |
| 1661 Lisp_Object doc_string = (nargs > 4) ? args[4] : Qnil; | |
| 1662 Lisp_Object interactive = (nargs > 5) ? args[5] : Qunbound; | |
| 1663 | |
| 1664 if (nargs < 4 || nargs > 6) | |
| 1665 return Fsignal (Qwrong_number_of_arguments, | |
| 1666 list2 (intern ("make-byte-code"), make_int (nargs))); | |
| 1667 | |
| 1668 /* Check for valid formal parameter list now, to allow us to use | |
| 1669 SPECBIND_FAST_UNSAFE() later in funcall_compiled_function(). */ | |
| 1670 { | |
| 814 | 1671 EXTERNAL_LIST_LOOP_2 (symbol, arglist) |
| 428 | 1672 { |
| 1673 CHECK_SYMBOL (symbol); | |
| 1674 if (EQ (symbol, Qt) || | |
| 1675 EQ (symbol, Qnil) || | |
| 1676 SYMBOL_IS_KEYWORD (symbol)) | |
| 563 | 1677 invalid_constant_2 |
| 428 | 1678 ("Invalid constant symbol in formal parameter list", |
| 1679 symbol, arglist); | |
| 1680 } | |
| 1681 } | |
| 1682 f->arglist = arglist; | |
| 1683 | |
| 1684 /* `instructions' is a string or a cons (string . int) for a | |
| 1685 lazy-loaded function. */ | |
| 1686 if (CONSP (instructions)) | |
| 1687 { | |
| 1688 CHECK_STRING (XCAR (instructions)); | |
| 1689 CHECK_INT (XCDR (instructions)); | |
| 1690 } | |
| 1691 else | |
| 1692 { | |
| 1693 CHECK_STRING (instructions); | |
| 1694 } | |
| 1695 f->instructions = instructions; | |
| 1696 | |
| 1697 if (!NILP (constants)) | |
| 1698 CHECK_VECTOR (constants); | |
| 1699 f->constants = constants; | |
| 1700 | |
| 1701 CHECK_NATNUM (stack_depth); | |
| 442 | 1702 f->stack_depth = (unsigned short) XINT (stack_depth); |
| 428 | 1703 |
| 1704 #ifdef COMPILED_FUNCTION_ANNOTATION_HACK | |
| 1705 if (!NILP (Vcurrent_compiled_function_annotation)) | |
| 1706 f->annotated = Fcopy (Vcurrent_compiled_function_annotation); | |
| 1707 else if (!NILP (Vload_file_name_internal_the_purecopy)) | |
| 1708 f->annotated = Vload_file_name_internal_the_purecopy; | |
| 1709 else if (!NILP (Vload_file_name_internal)) | |
| 1710 { | |
| 1711 struct gcpro gcpro1; | |
| 1712 GCPRO1 (fun); /* don't let fun get reaped */ | |
| 1713 Vload_file_name_internal_the_purecopy = | |
| 1714 Ffile_name_nondirectory (Vload_file_name_internal); | |
| 1715 f->annotated = Vload_file_name_internal_the_purecopy; | |
| 1716 UNGCPRO; | |
| 1717 } | |
| 1718 #endif /* COMPILED_FUNCTION_ANNOTATION_HACK */ | |
| 1719 | |
| 1720 /* doc_string may be nil, string, int, or a cons (string . int). | |
| 1721 interactive may be list or string (or unbound). */ | |
| 1722 f->doc_and_interactive = Qunbound; | |
| 1723 #ifdef I18N3 | |
| 1724 if ((f->flags.domainp = !NILP (Vfile_domain)) != 0) | |
| 1725 f->doc_and_interactive = Vfile_domain; | |
| 1726 #endif | |
| 1727 if ((f->flags.interactivep = !UNBOUNDP (interactive)) != 0) | |
| 1728 { | |
| 1729 f->doc_and_interactive | |
| 1730 = (UNBOUNDP (f->doc_and_interactive) ? interactive : | |
| 1731 Fcons (interactive, f->doc_and_interactive)); | |
| 1732 } | |
| 1733 if ((f->flags.documentationp = !NILP (doc_string)) != 0) | |
| 1734 { | |
| 1735 f->doc_and_interactive | |
| 1736 = (UNBOUNDP (f->doc_and_interactive) ? doc_string : | |
| 1737 Fcons (doc_string, f->doc_and_interactive)); | |
| 1738 } | |
| 1739 if (UNBOUNDP (f->doc_and_interactive)) | |
| 1740 f->doc_and_interactive = Qnil; | |
| 1741 | |
| 1742 return fun; | |
| 1743 } | |
| 1744 | |
| 1745 | |
| 1746 /************************************************************************/ | |
| 1747 /* Symbol allocation */ | |
| 1748 /************************************************************************/ | |
| 1749 | |
| 440 | 1750 DECLARE_FIXED_TYPE_ALLOC (symbol, Lisp_Symbol); |
| 428 | 1751 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_symbol 1000 |
| 1752 | |
| 1753 DEFUN ("make-symbol", Fmake_symbol, 1, 1, 0, /* | |
| 1754 Return a newly allocated uninterned symbol whose name is NAME. | |
| 1755 Its value and function definition are void, and its property list is nil. | |
| 1756 */ | |
| 1757 (name)) | |
| 1758 { | |
| 440 | 1759 Lisp_Symbol *p; |
| 428 | 1760 |
| 1761 CHECK_STRING (name); | |
| 1762 | |
| 440 | 1763 ALLOCATE_FIXED_TYPE (symbol, Lisp_Symbol, p); |
| 442 | 1764 set_lheader_implementation (&p->lheader, &lrecord_symbol); |
| 793 | 1765 p->name = name; |
| 428 | 1766 p->plist = Qnil; |
| 1767 p->value = Qunbound; | |
| 1768 p->function = Qunbound; | |
| 1769 symbol_next (p) = 0; | |
| 793 | 1770 return wrap_symbol (p); |
| 428 | 1771 } |
| 1772 | |
| 1773 | |
| 1774 /************************************************************************/ | |
| 1775 /* Extent allocation */ | |
| 1776 /************************************************************************/ | |
| 1777 | |
| 1778 DECLARE_FIXED_TYPE_ALLOC (extent, struct extent); | |
| 1779 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_extent 1000 | |
| 1780 | |
| 1781 struct extent * | |
| 1782 allocate_extent (void) | |
| 1783 { | |
| 1784 struct extent *e; | |
| 1785 | |
| 1786 ALLOCATE_FIXED_TYPE (extent, struct extent, e); | |
| 442 | 1787 set_lheader_implementation (&e->lheader, &lrecord_extent); |
| 428 | 1788 extent_object (e) = Qnil; |
| 1789 set_extent_start (e, -1); | |
| 1790 set_extent_end (e, -1); | |
| 1791 e->plist = Qnil; | |
| 1792 | |
| 1793 xzero (e->flags); | |
| 1794 | |
| 1795 extent_face (e) = Qnil; | |
| 1796 e->flags.end_open = 1; /* default is for endpoints to behave like markers */ | |
| 1797 e->flags.detachable = 1; | |
| 1798 | |
| 1799 return e; | |
| 1800 } | |
| 1801 | |
| 1802 | |
| 1803 /************************************************************************/ | |
| 1804 /* Event allocation */ | |
| 1805 /************************************************************************/ | |
| 1806 | |
| 440 | 1807 DECLARE_FIXED_TYPE_ALLOC (event, Lisp_Event); |
| 428 | 1808 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_event 1000 |
| 1809 | |
| 1810 Lisp_Object | |
| 1811 allocate_event (void) | |
| 1812 { | |
| 440 | 1813 Lisp_Event *e; |
| 1814 | |
| 1815 ALLOCATE_FIXED_TYPE (event, Lisp_Event, e); | |
| 442 | 1816 set_lheader_implementation (&e->lheader, &lrecord_event); |
| 428 | 1817 |
| 793 | 1818 return wrap_event (e); |
| 428 | 1819 } |
| 1820 | |
| 1204 | 1821 #ifdef EVENT_DATA_AS_OBJECTS |
| 934 | 1822 DECLARE_FIXED_TYPE_ALLOC (key_data, Lisp_Key_Data); |
| 1823 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_key_data 1000 | |
| 1824 | |
| 1825 Lisp_Object | |
| 1204 | 1826 make_key_data (void) |
| 934 | 1827 { |
| 1828 Lisp_Key_Data *d; | |
| 1829 | |
| 1830 ALLOCATE_FIXED_TYPE (key_data, Lisp_Key_Data, d); | |
| 1204 | 1831 xzero (*d); |
| 934 | 1832 set_lheader_implementation (&d->lheader, &lrecord_key_data); |
| 1204 | 1833 d->keysym = Qnil; |
| 1834 | |
| 1835 return wrap_key_data (d); | |
| 934 | 1836 } |
| 1837 | |
| 1838 DECLARE_FIXED_TYPE_ALLOC (button_data, Lisp_Button_Data); | |
| 1839 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_button_data 1000 | |
| 1840 | |
| 1841 Lisp_Object | |
| 1204 | 1842 make_button_data (void) |
| 934 | 1843 { |
| 1844 Lisp_Button_Data *d; | |
| 1845 | |
| 1846 ALLOCATE_FIXED_TYPE (button_data, Lisp_Button_Data, d); | |
| 1204 | 1847 xzero (*d); |
| 934 | 1848 set_lheader_implementation (&d->lheader, &lrecord_button_data); |
| 1849 | |
| 1204 | 1850 return wrap_button_data (d); |
| 934 | 1851 } |
| 1852 | |
| 1853 DECLARE_FIXED_TYPE_ALLOC (motion_data, Lisp_Motion_Data); | |
| 1854 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_motion_data 1000 | |
| 1855 | |
| 1856 Lisp_Object | |
| 1204 | 1857 make_motion_data (void) |
| 934 | 1858 { |
| 1859 Lisp_Motion_Data *d; | |
| 1860 | |
| 1861 ALLOCATE_FIXED_TYPE (motion_data, Lisp_Motion_Data, d); | |
| 1204 | 1862 xzero (*d); |
| 934 | 1863 set_lheader_implementation (&d->lheader, &lrecord_motion_data); |
| 1864 | |
| 1204 | 1865 return wrap_motion_data (d); |
| 934 | 1866 } |
| 1867 | |
| 1868 DECLARE_FIXED_TYPE_ALLOC (process_data, Lisp_Process_Data); | |
| 1869 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_process_data 1000 | |
| 1870 | |
| 1871 Lisp_Object | |
| 1204 | 1872 make_process_data (void) |
| 934 | 1873 { |
| 1874 Lisp_Process_Data *d; | |
| 1875 | |
| 1876 ALLOCATE_FIXED_TYPE (process_data, Lisp_Process_Data, d); | |
| 1204 | 1877 xzero (*d); |
| 934 | 1878 set_lheader_implementation (&d->lheader, &lrecord_process_data); |
| 1204 | 1879 d->process = Qnil; |
| 1880 | |
| 1881 return wrap_process_data (d); | |
| 934 | 1882 } |
| 1883 | |
| 1884 DECLARE_FIXED_TYPE_ALLOC (timeout_data, Lisp_Timeout_Data); | |
| 1885 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_timeout_data 1000 | |
| 1886 | |
| 1887 Lisp_Object | |
| 1204 | 1888 make_timeout_data (void) |
| 934 | 1889 { |
| 1890 Lisp_Timeout_Data *d; | |
| 1891 | |
| 1892 ALLOCATE_FIXED_TYPE (timeout_data, Lisp_Timeout_Data, d); | |
| 1204 | 1893 xzero (*d); |
| 934 | 1894 set_lheader_implementation (&d->lheader, &lrecord_timeout_data); |
| 1204 | 1895 d->function = Qnil; |
| 1896 d->object = Qnil; | |
| 1897 | |
| 1898 return wrap_timeout_data (d); | |
| 934 | 1899 } |
| 1900 | |
| 1901 DECLARE_FIXED_TYPE_ALLOC (magic_data, Lisp_Magic_Data); | |
| 1902 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_magic_data 1000 | |
| 1903 | |
| 1904 Lisp_Object | |
| 1204 | 1905 make_magic_data (void) |
| 934 | 1906 { |
| 1907 Lisp_Magic_Data *d; | |
| 1908 | |
| 1909 ALLOCATE_FIXED_TYPE (magic_data, Lisp_Magic_Data, d); | |
| 1204 | 1910 xzero (*d); |
| 934 | 1911 set_lheader_implementation (&d->lheader, &lrecord_magic_data); |
| 1912 | |
| 1204 | 1913 return wrap_magic_data (d); |
| 934 | 1914 } |
| 1915 | |
| 1916 DECLARE_FIXED_TYPE_ALLOC (magic_eval_data, Lisp_Magic_Eval_Data); | |
| 1917 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_magic_eval_data 1000 | |
| 1918 | |
| 1919 Lisp_Object | |
| 1204 | 1920 make_magic_eval_data (void) |
| 934 | 1921 { |
| 1922 Lisp_Magic_Eval_Data *d; | |
| 1923 | |
| 1924 ALLOCATE_FIXED_TYPE (magic_eval_data, Lisp_Magic_Eval_Data, d); | |
| 1204 | 1925 xzero (*d); |
| 934 | 1926 set_lheader_implementation (&d->lheader, &lrecord_magic_eval_data); |
| 1204 | 1927 d->object = Qnil; |
| 1928 | |
| 1929 return wrap_magic_eval_data (d); | |
| 934 | 1930 } |
| 1931 | |
| 1932 DECLARE_FIXED_TYPE_ALLOC (eval_data, Lisp_Eval_Data); | |
| 1933 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_eval_data 1000 | |
| 1934 | |
| 1935 Lisp_Object | |
| 1204 | 1936 make_eval_data (void) |
| 934 | 1937 { |
| 1938 Lisp_Eval_Data *d; | |
| 1939 | |
| 1940 ALLOCATE_FIXED_TYPE (eval_data, Lisp_Eval_Data, d); | |
| 1204 | 1941 xzero (*d); |
| 934 | 1942 set_lheader_implementation (&d->lheader, &lrecord_eval_data); |
| 1204 | 1943 d->function = Qnil; |
| 1944 d->object = Qnil; | |
| 1945 | |
| 1946 return wrap_eval_data (d); | |
| 934 | 1947 } |
| 1948 | |
| 1949 DECLARE_FIXED_TYPE_ALLOC (misc_user_data, Lisp_Misc_User_Data); | |
| 1950 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_misc_user_data 1000 | |
| 1951 | |
| 1952 Lisp_Object | |
| 1204 | 1953 make_misc_user_data (void) |
| 934 | 1954 { |
| 1955 Lisp_Misc_User_Data *d; | |
| 1956 | |
| 1957 ALLOCATE_FIXED_TYPE (misc_user_data, Lisp_Misc_User_Data, d); | |
| 1204 | 1958 xzero (*d); |
| 934 | 1959 set_lheader_implementation (&d->lheader, &lrecord_misc_user_data); |
| 1204 | 1960 d->function = Qnil; |
| 1961 d->object = Qnil; | |
| 1962 | |
| 1963 return wrap_misc_user_data (d); | |
| 934 | 1964 } |
| 1204 | 1965 |
| 1966 #endif /* EVENT_DATA_AS_OBJECTS */ | |
| 428 | 1967 |
| 1968 /************************************************************************/ | |
| 1969 /* Marker allocation */ | |
| 1970 /************************************************************************/ | |
| 1971 | |
| 440 | 1972 DECLARE_FIXED_TYPE_ALLOC (marker, Lisp_Marker); |
| 428 | 1973 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_marker 1000 |
| 1974 | |
| 1975 DEFUN ("make-marker", Fmake_marker, 0, 0, 0, /* | |
| 1976 Return a new marker which does not point at any place. | |
| 1977 */ | |
| 1978 ()) | |
| 1979 { | |
| 440 | 1980 Lisp_Marker *p; |
| 1981 | |
| 1982 ALLOCATE_FIXED_TYPE (marker, Lisp_Marker, p); | |
| 442 | 1983 set_lheader_implementation (&p->lheader, &lrecord_marker); |
| 428 | 1984 p->buffer = 0; |
| 665 | 1985 p->membpos = 0; |
| 428 | 1986 marker_next (p) = 0; |
| 1987 marker_prev (p) = 0; | |
| 1988 p->insertion_type = 0; | |
| 793 | 1989 return wrap_marker (p); |
| 428 | 1990 } |
| 1991 | |
| 1992 Lisp_Object | |
| 1993 noseeum_make_marker (void) | |
| 1994 { | |
| 440 | 1995 Lisp_Marker *p; |
| 1996 | |
| 1997 NOSEEUM_ALLOCATE_FIXED_TYPE (marker, Lisp_Marker, p); | |
| 442 | 1998 set_lheader_implementation (&p->lheader, &lrecord_marker); |
| 428 | 1999 p->buffer = 0; |
| 665 | 2000 p->membpos = 0; |
| 428 | 2001 marker_next (p) = 0; |
| 2002 marker_prev (p) = 0; | |
| 2003 p->insertion_type = 0; | |
| 793 | 2004 return wrap_marker (p); |
| 428 | 2005 } |
| 2006 | |
| 2007 | |
| 2008 /************************************************************************/ | |
| 2009 /* String allocation */ | |
| 2010 /************************************************************************/ | |
| 2011 | |
| 2012 /* The data for "short" strings generally resides inside of structs of type | |
| 2013 string_chars_block. The Lisp_String structure is allocated just like any | |
| 1204 | 2014 other basic lrecord, and these are freelisted when they get garbage |
| 2015 collected. The data for short strings get compacted, but the data for | |
| 2016 large strings do not. | |
| 428 | 2017 |
| 2018 Previously Lisp_String structures were relocated, but this caused a lot | |
| 2019 of bus-errors because the C code didn't include enough GCPRO's for | |
| 2020 strings (since EVERY REFERENCE to a short string needed to be GCPRO'd so | |
| 2021 that the reference would get relocated). | |
| 2022 | |
| 2023 This new method makes things somewhat bigger, but it is MUCH safer. */ | |
| 2024 | |
| 438 | 2025 DECLARE_FIXED_TYPE_ALLOC (string, Lisp_String); |
| 428 | 2026 /* strings are used and freed quite often */ |
| 2027 /* #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_string 10000 */ | |
| 2028 #define MINIMUM_ALLOWED_FIXED_TYPE_CELLS_string 1000 | |
| 2029 | |
| 2030 static Lisp_Object | |
| 2031 mark_string (Lisp_Object obj) | |
| 2032 { | |
| 793 | 2033 if (CONSP (XSTRING_PLIST (obj)) && EXTENT_INFOP (XCAR (XSTRING_PLIST (obj)))) |
| 2034 flush_cached_extent_info (XCAR (XSTRING_PLIST (obj))); | |
| 2035 return XSTRING_PLIST (obj); | |
| 428 | 2036 } |
| 2037 | |
| 2038 static int | |
| 2039 string_equal (Lisp_Object obj1, Lisp_Object obj2, int depth) | |
| 2040 { | |
| 2041 Bytecount len; | |
| 2042 return (((len = XSTRING_LENGTH (obj1)) == XSTRING_LENGTH (obj2)) && | |
| 2043 !memcmp (XSTRING_DATA (obj1), XSTRING_DATA (obj2), len)); | |
| 2044 } | |
| 2045 | |
| 1204 | 2046 static const struct memory_description string_description[] = { |
| 793 | 2047 { XD_BYTECOUNT, offsetof (Lisp_String, size_) }, |
| 2048 { XD_OPAQUE_DATA_PTR, offsetof (Lisp_String, data_), XD_INDIRECT(0, 1) }, | |
| 440 | 2049 { XD_LISP_OBJECT, offsetof (Lisp_String, plist) }, |
| 428 | 2050 { XD_END } |
| 2051 }; | |
| 2052 | |
| 442 | 2053 /* We store the string's extent info as the first element of the string's |
| 2054 property list; and the string's MODIFF as the first or second element | |
| 2055 of the string's property list (depending on whether the extent info | |
| 2056 is present), but only if the string has been modified. This is ugly | |
| 2057 but it reduces the memory allocated for the string in the vast | |
| 2058 majority of cases, where the string is never modified and has no | |
| 2059 extent info. | |
| 2060 | |
| 2061 #### This means you can't use an int as a key in a string's plist. */ | |
| 2062 | |
| 2063 static Lisp_Object * | |
| 2064 string_plist_ptr (Lisp_Object string) | |
| 2065 { | |
| 793 | 2066 Lisp_Object *ptr = &XSTRING_PLIST (string); |
| 442 | 2067 |
| 2068 if (CONSP (*ptr) && EXTENT_INFOP (XCAR (*ptr))) | |
| 2069 ptr = &XCDR (*ptr); | |
| 2070 if (CONSP (*ptr) && INTP (XCAR (*ptr))) | |
| 2071 ptr = &XCDR (*ptr); | |
| 2072 return ptr; | |
| 2073 } | |
| 2074 | |
| 2075 static Lisp_Object | |
| 2076 string_getprop (Lisp_Object string, Lisp_Object property) | |
| 2077 { | |
| 2078 return external_plist_get (string_plist_ptr (string), property, 0, ERROR_ME); | |
| 2079 } | |
| 2080 | |
| 2081 static int | |
| 2082 string_putprop (Lisp_Object string, Lisp_Object property, Lisp_Object value) | |
| 2083 { | |
| 2084 external_plist_put (string_plist_ptr (string), property, value, 0, ERROR_ME); | |
| 2085 return 1; | |
| 2086 } | |
| 2087 | |
| 2088 static int | |
| 2089 string_remprop (Lisp_Object string, Lisp_Object property) | |
| 2090 { | |
| 2091 return external_remprop (string_plist_ptr (string), property, 0, ERROR_ME); | |
| 2092 } | |
| 2093 | |
| 2094 static Lisp_Object | |
| 2095 string_plist (Lisp_Object string) | |
| 2096 { | |
| 2097 return *string_plist_ptr (string); | |
| 2098 } | |
| 2099 | |
| 2100 /* No `finalize', or `hash' methods. | |
| 2101 internal_hash() already knows how to hash strings and finalization | |
| 2102 is done with the ADDITIONAL_FREE_string macro, which is the | |
| 2103 standard way to do finalization when using | |
| 2104 SWEEP_FIXED_TYPE_BLOCK(). */ | |
| 934 | 2105 DEFINE_BASIC_LRECORD_IMPLEMENTATION_WITH_PROPS ("string", string, |
| 2106 1, /*dumpable-flag*/ | |
| 2107 mark_string, print_string, | |
| 2108 0, string_equal, 0, | |
| 2109 string_description, | |
| 2110 string_getprop, | |
| 2111 string_putprop, | |
| 2112 string_remprop, | |
| 2113 string_plist, | |
| 2114 Lisp_String); | |
| 428 | 2115 /* String blocks contain this many useful bytes. */ |
| 2116 #define STRING_CHARS_BLOCK_SIZE \ | |
| 814 | 2117 ((Bytecount) (8192 - MALLOC_OVERHEAD - \ |
| 2118 ((2 * sizeof (struct string_chars_block *)) \ | |
| 2119 + sizeof (EMACS_INT)))) | |
| 428 | 2120 /* Block header for small strings. */ |
| 2121 struct string_chars_block | |
| 2122 { | |
| 2123 EMACS_INT pos; | |
| 2124 struct string_chars_block *next; | |
| 2125 struct string_chars_block *prev; | |
| 2126 /* Contents of string_chars_block->string_chars are interleaved | |
| 2127 string_chars structures (see below) and the actual string data */ | |
| 2128 unsigned char string_chars[STRING_CHARS_BLOCK_SIZE]; | |
| 2129 }; | |
| 2130 | |
| 2131 static struct string_chars_block *first_string_chars_block; | |
| 2132 static struct string_chars_block *current_string_chars_block; | |
| 2133 | |
| 2134 /* If SIZE is the length of a string, this returns how many bytes | |
| 2135 * the string occupies in string_chars_block->string_chars | |
| 2136 * (including alignment padding). | |
| 2137 */ | |
| 438 | 2138 #define STRING_FULLSIZE(size) \ |
| 826 | 2139 ALIGN_FOR_TYPE (((size) + 1 + sizeof (Lisp_String *)), Lisp_String *) |
| 428 | 2140 |
| 2141 #define BIG_STRING_FULLSIZE_P(fullsize) ((fullsize) >= STRING_CHARS_BLOCK_SIZE) | |
| 2142 #define BIG_STRING_SIZE_P(size) (BIG_STRING_FULLSIZE_P (STRING_FULLSIZE(size))) | |
| 2143 | |
| 454 | 2144 #define STRING_CHARS_FREE_P(ptr) ((ptr)->string == NULL) |
| 2145 #define MARK_STRING_CHARS_AS_FREE(ptr) ((void) ((ptr)->string = NULL)) | |
| 2146 | |
| 428 | 2147 struct string_chars |
| 2148 { | |
| 438 | 2149 Lisp_String *string; |
| 428 | 2150 unsigned char chars[1]; |
| 2151 }; | |
| 2152 | |
| 2153 struct unused_string_chars | |
| 2154 { | |
| 438 | 2155 Lisp_String *string; |
| 428 | 2156 EMACS_INT fullsize; |
| 2157 }; | |
| 2158 | |
| 2159 static void | |
| 2160 init_string_chars_alloc (void) | |
| 2161 { | |
| 2162 first_string_chars_block = xnew (struct string_chars_block); | |
| 2163 first_string_chars_block->prev = 0; | |
| 2164 first_string_chars_block->next = 0; | |
| 2165 first_string_chars_block->pos = 0; | |
| 2166 current_string_chars_block = first_string_chars_block; | |
| 2167 } | |
| 2168 | |
| 1550 | 2169 static Ibyte * |
| 2170 allocate_big_string_chars (Bytecount length) | |
| 2171 { | |
| 2172 Ibyte *p = xnew_array (Ibyte, length); | |
| 2173 INCREMENT_CONS_COUNTER (length, "string chars"); | |
| 2174 return p; | |
| 2175 } | |
| 2176 | |
| 428 | 2177 static struct string_chars * |
| 793 | 2178 allocate_string_chars_struct (Lisp_Object string_it_goes_with, |
| 814 | 2179 Bytecount fullsize) |
| 428 | 2180 { |
| 2181 struct string_chars *s_chars; | |
| 2182 | |
| 438 | 2183 if (fullsize <= |
| 2184 (countof (current_string_chars_block->string_chars) | |
| 2185 - current_string_chars_block->pos)) | |
| 428 | 2186 { |
| 2187 /* This string can fit in the current string chars block */ | |
| 2188 s_chars = (struct string_chars *) | |
| 2189 (current_string_chars_block->string_chars | |
| 2190 + current_string_chars_block->pos); | |
| 2191 current_string_chars_block->pos += fullsize; | |
| 2192 } | |
| 2193 else | |
| 2194 { | |
| 2195 /* Make a new current string chars block */ | |
| 2196 struct string_chars_block *new_scb = xnew (struct string_chars_block); | |
| 2197 | |
| 2198 current_string_chars_block->next = new_scb; | |
| 2199 new_scb->prev = current_string_chars_block; | |
| 2200 new_scb->next = 0; | |
| 2201 current_string_chars_block = new_scb; | |
| 2202 new_scb->pos = fullsize; | |
| 2203 s_chars = (struct string_chars *) | |
| 2204 current_string_chars_block->string_chars; | |
| 2205 } | |
| 2206 | |
| 793 | 2207 s_chars->string = XSTRING (string_it_goes_with); |
| 428 | 2208 |
| 2209 INCREMENT_CONS_COUNTER (fullsize, "string chars"); | |
| 2210 | |
| 2211 return s_chars; | |
| 2212 } | |
| 2213 | |
| 771 | 2214 #ifdef SLEDGEHAMMER_CHECK_ASCII_BEGIN |
| 2215 void | |
| 2216 sledgehammer_check_ascii_begin (Lisp_Object str) | |
| 2217 { | |
| 2218 Bytecount i; | |
| 2219 | |
| 2220 for (i = 0; i < XSTRING_LENGTH (str); i++) | |
| 2221 { | |
| 826 | 2222 if (!byte_ascii_p (string_byte (str, i))) |
| 771 | 2223 break; |
| 2224 } | |
| 2225 | |
| 2226 assert (i == (Bytecount) XSTRING_ASCII_BEGIN (str) || | |
| 2227 (i > MAX_STRING_ASCII_BEGIN && | |
| 2228 (Bytecount) XSTRING_ASCII_BEGIN (str) == | |
| 2229 (Bytecount) MAX_STRING_ASCII_BEGIN)); | |
| 2230 } | |
| 2231 #endif | |
| 2232 | |
| 2233 /* You do NOT want to be calling this! (And if you do, you must call | |
| 851 | 2234 XSET_STRING_ASCII_BEGIN() after modifying the string.) Use ALLOCA () |
| 771 | 2235 instead and then call make_string() like the rest of the world. */ |
| 2236 | |
| 428 | 2237 Lisp_Object |
| 2238 make_uninit_string (Bytecount length) | |
| 2239 { | |
| 438 | 2240 Lisp_String *s; |
| 814 | 2241 Bytecount fullsize = STRING_FULLSIZE (length); |
| 428 | 2242 |
| 438 | 2243 assert (length >= 0 && fullsize > 0); |
| 428 | 2244 |
| 2245 /* Allocate the string header */ | |
| 438 | 2246 ALLOCATE_FIXED_TYPE (string, Lisp_String, s); |
| 793 | 2247 xzero (*s); |
| 771 | 2248 set_lheader_implementation (&s->u.lheader, &lrecord_string); |
| 793 | 2249 |
| 826 | 2250 set_lispstringp_data (s, BIG_STRING_FULLSIZE_P (fullsize) |
| 1550 | 2251 ? allocate_big_string_chars (length + 1) |
| 793 | 2252 : allocate_string_chars_struct (wrap_string (s), |
| 2253 fullsize)->chars); | |
| 438 | 2254 |
| 826 | 2255 set_lispstringp_length (s, length); |
| 428 | 2256 s->plist = Qnil; |
| 793 | 2257 set_string_byte (wrap_string (s), length, 0); |
| 2258 | |
| 2259 return wrap_string (s); | |
| 428 | 2260 } |
| 2261 | |
| 2262 #ifdef VERIFY_STRING_CHARS_INTEGRITY | |
| 2263 static void verify_string_chars_integrity (void); | |
| 2264 #endif | |
| 2265 | |
| 2266 /* Resize the string S so that DELTA bytes can be inserted starting | |
| 2267 at POS. If DELTA < 0, it means deletion starting at POS. If | |
| 2268 POS < 0, resize the string but don't copy any characters. Use | |
| 2269 this if you're planning on completely overwriting the string. | |
| 2270 */ | |
| 2271 | |
| 2272 void | |
| 793 | 2273 resize_string (Lisp_Object s, Bytecount pos, Bytecount delta) |
| 428 | 2274 { |
| 438 | 2275 Bytecount oldfullsize, newfullsize; |
| 428 | 2276 #ifdef VERIFY_STRING_CHARS_INTEGRITY |
| 2277 verify_string_chars_integrity (); | |
| 2278 #endif | |
| 2279 | |
| 800 | 2280 #ifdef ERROR_CHECK_TEXT |
| 428 | 2281 if (pos >= 0) |
| 2282 { | |
| 793 | 2283 assert (pos <= XSTRING_LENGTH (s)); |
| 428 | 2284 if (delta < 0) |
| 793 | 2285 assert (pos + (-delta) <= XSTRING_LENGTH (s)); |
| 428 | 2286 } |
| 2287 else | |
| 2288 { | |
| 2289 if (delta < 0) | |
| 793 | 2290 assert ((-delta) <= XSTRING_LENGTH (s)); |
| 428 | 2291 } |
| 800 | 2292 #endif /* ERROR_CHECK_TEXT */ |
| 428 | 2293 |
| 2294 if (delta == 0) | |
| 2295 /* simplest case: no size change. */ | |
| 2296 return; | |
| 438 | 2297 |
| 2298 if (pos >= 0 && delta < 0) | |
| 2299 /* If DELTA < 0, the functions below will delete the characters | |
| 2300 before POS. We want to delete characters *after* POS, however, | |
| 2301 so convert this to the appropriate form. */ | |
| 2302 pos += -delta; | |
| 2303 | |
| 793 | 2304 oldfullsize = STRING_FULLSIZE (XSTRING_LENGTH (s)); |
| 2305 newfullsize = STRING_FULLSIZE (XSTRING_LENGTH (s) + delta); | |
| 438 | 2306 |
| 2307 if (BIG_STRING_FULLSIZE_P (oldfullsize)) | |
| 428 | 2308 { |
| 438 | 2309 if (BIG_STRING_FULLSIZE_P (newfullsize)) |
| 428 | 2310 { |
| 440 | 2311 /* Both strings are big. We can just realloc(). |
| 2312 But careful! If the string is shrinking, we have to | |
| 2313 memmove() _before_ realloc(), and if growing, we have to | |
| 2314 memmove() _after_ realloc() - otherwise the access is | |
| 2315 illegal, and we might crash. */ | |
| 793 | 2316 Bytecount len = XSTRING_LENGTH (s) + 1 - pos; |
| 440 | 2317 |
| 2318 if (delta < 0 && pos >= 0) | |
| 793 | 2319 memmove (XSTRING_DATA (s) + pos + delta, |
| 2320 XSTRING_DATA (s) + pos, len); | |
| 2321 XSET_STRING_DATA | |
| 867 | 2322 (s, (Ibyte *) xrealloc (XSTRING_DATA (s), |
| 793 | 2323 XSTRING_LENGTH (s) + delta + 1)); |
| 440 | 2324 if (delta > 0 && pos >= 0) |
| 793 | 2325 memmove (XSTRING_DATA (s) + pos + delta, XSTRING_DATA (s) + pos, |
| 2326 len); | |
| 1550 | 2327 /* Bump the cons counter. |
| 2328 Conservative; Martin let the increment be delta. */ | |
| 2329 INCREMENT_CONS_COUNTER (newfullsize, "string chars"); | |
| 428 | 2330 } |
| 438 | 2331 else /* String has been demoted from BIG_STRING. */ |
| 428 | 2332 { |
| 867 | 2333 Ibyte *new_data = |
| 438 | 2334 allocate_string_chars_struct (s, newfullsize)->chars; |
| 867 | 2335 Ibyte *old_data = XSTRING_DATA (s); |
| 438 | 2336 |
| 2337 if (pos >= 0) | |
| 2338 { | |
| 2339 memcpy (new_data, old_data, pos); | |
| 2340 memcpy (new_data + pos + delta, old_data + pos, | |
| 793 | 2341 XSTRING_LENGTH (s) + 1 - pos); |
| 438 | 2342 } |
| 793 | 2343 XSET_STRING_DATA (s, new_data); |
| 1726 | 2344 xfree (old_data, Ibyte *); |
| 438 | 2345 } |
| 2346 } | |
| 2347 else /* old string is small */ | |
| 2348 { | |
| 2349 if (oldfullsize == newfullsize) | |
| 2350 { | |
| 2351 /* special case; size change but the necessary | |
| 2352 allocation size won't change (up or down; code | |
| 2353 somewhere depends on there not being any unused | |
| 2354 allocation space, modulo any alignment | |
| 2355 constraints). */ | |
| 428 | 2356 if (pos >= 0) |
| 2357 { | |
| 867 | 2358 Ibyte *addroff = pos + XSTRING_DATA (s); |
| 428 | 2359 |
| 2360 memmove (addroff + delta, addroff, | |
| 2361 /* +1 due to zero-termination. */ | |
| 793 | 2362 XSTRING_LENGTH (s) + 1 - pos); |
| 428 | 2363 } |
| 2364 } | |
| 2365 else | |
| 2366 { | |
| 867 | 2367 Ibyte *old_data = XSTRING_DATA (s); |
| 2368 Ibyte *new_data = | |
| 438 | 2369 BIG_STRING_FULLSIZE_P (newfullsize) |
| 1550 | 2370 ? allocate_big_string_chars (XSTRING_LENGTH (s) + delta + 1) |
| 438 | 2371 : allocate_string_chars_struct (s, newfullsize)->chars; |
| 2372 | |
| 428 | 2373 if (pos >= 0) |
| 2374 { | |
| 438 | 2375 memcpy (new_data, old_data, pos); |
| 2376 memcpy (new_data + pos + delta, old_data + pos, | |
| 793 | 2377 XSTRING_LENGTH (s) + 1 - pos); |
| 428 | 2378 } |
| 793 | 2379 XSET_STRING_DATA (s, new_data); |
| 438 | 2380 |
| 2381 { | |
| 2382 /* We need to mark this chunk of the string_chars_block | |
| 2383 as unused so that compact_string_chars() doesn't | |
| 2384 freak. */ | |
| 2385 struct string_chars *old_s_chars = (struct string_chars *) | |
| 2386 ((char *) old_data - offsetof (struct string_chars, chars)); | |
| 2387 /* Sanity check to make sure we aren't hosed by strange | |
| 2388 alignment/padding. */ | |
| 793 | 2389 assert (old_s_chars->string == XSTRING (s)); |
| 454 | 2390 MARK_STRING_CHARS_AS_FREE (old_s_chars); |
| 438 | 2391 ((struct unused_string_chars *) old_s_chars)->fullsize = |
| 2392 oldfullsize; | |
| 2393 } | |
| 428 | 2394 } |
| 438 | 2395 } |
| 2396 | |
| 793 | 2397 XSET_STRING_LENGTH (s, XSTRING_LENGTH (s) + delta); |
| 438 | 2398 /* If pos < 0, the string won't be zero-terminated. |
| 2399 Terminate now just to make sure. */ | |
| 793 | 2400 XSTRING_DATA (s)[XSTRING_LENGTH (s)] = '\0'; |
| 438 | 2401 |
| 2402 if (pos >= 0) | |
| 793 | 2403 /* We also have to adjust all of the extent indices after the |
| 2404 place we did the change. We say "pos - 1" because | |
| 2405 adjust_extents() is exclusive of the starting position | |
| 2406 passed to it. */ | |
| 2407 adjust_extents (s, pos - 1, XSTRING_LENGTH (s), delta); | |
| 428 | 2408 |
| 2409 #ifdef VERIFY_STRING_CHARS_INTEGRITY | |
| 2410 verify_string_chars_integrity (); | |
| 2411 #endif | |
| 2412 } | |
| 2413 | |
| 2414 #ifdef MULE | |
| 2415 | |
| 771 | 2416 /* WARNING: If you modify an existing string, you must call |
| 2417 CHECK_LISP_WRITEABLE() before and bump_string_modiff() afterwards. */ | |
| 428 | 2418 void |
| 867 | 2419 set_string_char (Lisp_Object s, Charcount i, Ichar c) |
| 428 | 2420 { |
| 867 | 2421 Ibyte newstr[MAX_ICHAR_LEN]; |
| 771 | 2422 Bytecount bytoff = string_index_char_to_byte (s, i); |
| 867 | 2423 Bytecount oldlen = itext_ichar_len (XSTRING_DATA (s) + bytoff); |
| 2424 Bytecount newlen = set_itext_ichar (newstr, c); | |
| 428 | 2425 |
| 793 | 2426 sledgehammer_check_ascii_begin (s); |
| 428 | 2427 if (oldlen != newlen) |
| 2428 resize_string (s, bytoff, newlen - oldlen); | |
| 793 | 2429 /* Remember, XSTRING_DATA (s) might have changed so we can't cache it. */ |
| 2430 memcpy (XSTRING_DATA (s) + bytoff, newstr, newlen); | |
| 771 | 2431 if (oldlen != newlen) |
| 2432 { | |
| 793 | 2433 if (newlen > 1 && i <= (Charcount) XSTRING_ASCII_BEGIN (s)) |
| 771 | 2434 /* Everything starting with the new char is no longer part of |
| 2435 ascii_begin */ | |
| 793 | 2436 XSET_STRING_ASCII_BEGIN (s, i); |
| 2437 else if (newlen == 1 && i == (Charcount) XSTRING_ASCII_BEGIN (s)) | |
| 771 | 2438 /* We've extended ascii_begin, and we have to figure out how much by */ |
| 2439 { | |
| 2440 Bytecount j; | |
| 814 | 2441 for (j = (Bytecount) i + 1; j < XSTRING_LENGTH (s); j++) |
| 771 | 2442 { |
| 826 | 2443 if (!byte_ascii_p (XSTRING_DATA (s)[j])) |
| 771 | 2444 break; |
| 2445 } | |
| 814 | 2446 XSET_STRING_ASCII_BEGIN (s, min (j, (Bytecount) MAX_STRING_ASCII_BEGIN)); |
| 771 | 2447 } |
| 2448 } | |
| 793 | 2449 sledgehammer_check_ascii_begin (s); |
| 428 | 2450 } |
| 2451 | |
| 2452 #endif /* MULE */ | |
| 2453 | |
| 2454 DEFUN ("make-string", Fmake_string, 2, 2, 0, /* | |
| 444 | 2455 Return a new string consisting of LENGTH copies of CHARACTER. |
| 2456 LENGTH must be a non-negative integer. | |
| 428 | 2457 */ |
| 444 | 2458 (length, character)) |
| 428 | 2459 { |
| 2460 CHECK_NATNUM (length); | |
| 444 | 2461 CHECK_CHAR_COERCE_INT (character); |
| 428 | 2462 { |
| 867 | 2463 Ibyte init_str[MAX_ICHAR_LEN]; |
| 2464 int len = set_itext_ichar (init_str, XCHAR (character)); | |
| 428 | 2465 Lisp_Object val = make_uninit_string (len * XINT (length)); |
| 2466 | |
| 2467 if (len == 1) | |
| 771 | 2468 { |
| 2469 /* Optimize the single-byte case */ | |
| 2470 memset (XSTRING_DATA (val), XCHAR (character), XSTRING_LENGTH (val)); | |
| 793 | 2471 XSET_STRING_ASCII_BEGIN (val, min (MAX_STRING_ASCII_BEGIN, |
| 2472 len * XINT (length))); | |
| 771 | 2473 } |
| 428 | 2474 else |
| 2475 { | |
| 647 | 2476 EMACS_INT i; |
| 867 | 2477 Ibyte *ptr = XSTRING_DATA (val); |
| 428 | 2478 |
| 2479 for (i = XINT (length); i; i--) | |
| 2480 { | |
| 867 | 2481 Ibyte *init_ptr = init_str; |
| 428 | 2482 switch (len) |
| 2483 { | |
| 2484 case 4: *ptr++ = *init_ptr++; | |
| 2485 case 3: *ptr++ = *init_ptr++; | |
| 2486 case 2: *ptr++ = *init_ptr++; | |
| 2487 case 1: *ptr++ = *init_ptr++; | |
| 2488 } | |
| 2489 } | |
| 2490 } | |
| 771 | 2491 sledgehammer_check_ascii_begin (val); |
| 428 | 2492 return val; |
| 2493 } | |
| 2494 } | |
| 2495 | |
| 2496 DEFUN ("string", Fstring, 0, MANY, 0, /* | |
| 2497 Concatenate all the argument characters and make the result a string. | |
| 2498 */ | |
| 2499 (int nargs, Lisp_Object *args)) | |
| 2500 { | |
| 867 | 2501 Ibyte *storage = alloca_array (Ibyte, nargs * MAX_ICHAR_LEN); |
| 2502 Ibyte *p = storage; | |
| 428 | 2503 |
| 2504 for (; nargs; nargs--, args++) | |
| 2505 { | |
| 2506 Lisp_Object lisp_char = *args; | |
| 2507 CHECK_CHAR_COERCE_INT (lisp_char); | |
| 867 | 2508 p += set_itext_ichar (p, XCHAR (lisp_char)); |
| 428 | 2509 } |
| 2510 return make_string (storage, p - storage); | |
| 2511 } | |
| 2512 | |
| 771 | 2513 /* Initialize the ascii_begin member of a string to the correct value. */ |
| 2514 | |
| 2515 void | |
| 2516 init_string_ascii_begin (Lisp_Object string) | |
| 2517 { | |
| 2518 #ifdef MULE | |
| 2519 int i; | |
| 2520 Bytecount length = XSTRING_LENGTH (string); | |
| 867 | 2521 Ibyte *contents = XSTRING_DATA (string); |
| 771 | 2522 |
| 2523 for (i = 0; i < length; i++) | |
| 2524 { | |
| 826 | 2525 if (!byte_ascii_p (contents[i])) |
| 771 | 2526 break; |
| 2527 } | |
| 793 | 2528 XSET_STRING_ASCII_BEGIN (string, min (i, MAX_STRING_ASCII_BEGIN)); |
| 771 | 2529 #else |
| 793 | 2530 XSET_STRING_ASCII_BEGIN (string, min (XSTRING_LENGTH (string), |
| 2531 MAX_STRING_ASCII_BEGIN)); | |
| 771 | 2532 #endif |
| 2533 sledgehammer_check_ascii_begin (string); | |
| 2534 } | |
| 428 | 2535 |
| 2536 /* Take some raw memory, which MUST already be in internal format, | |
| 2537 and package it up into a Lisp string. */ | |
| 2538 Lisp_Object | |
| 867 | 2539 make_string (const Ibyte *contents, Bytecount length) |
| 428 | 2540 { |
| 2541 Lisp_Object val; | |
| 2542 | |
| 2543 /* Make sure we find out about bad make_string's when they happen */ | |
| 800 | 2544 #if defined (ERROR_CHECK_TEXT) && defined (MULE) |
| 428 | 2545 bytecount_to_charcount (contents, length); /* Just for the assertions */ |
| 2546 #endif | |
| 2547 | |
| 2548 val = make_uninit_string (length); | |
| 2549 memcpy (XSTRING_DATA (val), contents, length); | |
| 771 | 2550 init_string_ascii_begin (val); |
| 2551 sledgehammer_check_ascii_begin (val); | |
| 428 | 2552 return val; |
| 2553 } | |
| 2554 | |
| 2555 /* Take some raw memory, encoded in some external data format, | |
| 2556 and convert it into a Lisp string. */ | |
| 2557 Lisp_Object | |
| 442 | 2558 make_ext_string (const Extbyte *contents, EMACS_INT length, |
| 440 | 2559 Lisp_Object coding_system) |
| 428 | 2560 { |
| 440 | 2561 Lisp_Object string; |
| 2562 TO_INTERNAL_FORMAT (DATA, (contents, length), | |
| 2563 LISP_STRING, string, | |
| 2564 coding_system); | |
| 2565 return string; | |
| 428 | 2566 } |
| 2567 | |
| 2568 Lisp_Object | |
| 867 | 2569 build_intstring (const Ibyte *str) |
| 771 | 2570 { |
| 2571 /* Some strlen's crash and burn if passed null. */ | |
| 814 | 2572 return make_string (str, (str ? qxestrlen (str) : (Bytecount) 0)); |
| 771 | 2573 } |
| 2574 | |
| 2575 Lisp_Object | |
| 867 | 2576 build_string (const CIbyte *str) |
| 428 | 2577 { |
| 2578 /* Some strlen's crash and burn if passed null. */ | |
| 867 | 2579 return make_string ((const Ibyte *) str, (str ? strlen (str) : 0)); |
| 428 | 2580 } |
| 2581 | |
| 2582 Lisp_Object | |
| 593 | 2583 build_ext_string (const Extbyte *str, Lisp_Object coding_system) |
| 428 | 2584 { |
| 2585 /* Some strlen's crash and burn if passed null. */ | |
| 442 | 2586 return make_ext_string ((const Extbyte *) str, (str ? strlen(str) : 0), |
| 440 | 2587 coding_system); |
| 428 | 2588 } |
| 2589 | |
| 2590 Lisp_Object | |
| 867 | 2591 build_msg_intstring (const Ibyte *str) |
| 428 | 2592 { |
| 771 | 2593 return build_intstring (GETTEXT (str)); |
| 2594 } | |
| 2595 | |
| 2596 Lisp_Object | |
| 867 | 2597 build_msg_string (const CIbyte *str) |
| 771 | 2598 { |
| 2599 return build_string (CGETTEXT (str)); | |
| 428 | 2600 } |
| 2601 | |
| 2602 Lisp_Object | |
| 867 | 2603 make_string_nocopy (const Ibyte *contents, Bytecount length) |
| 428 | 2604 { |
| 438 | 2605 Lisp_String *s; |
| 428 | 2606 Lisp_Object val; |
| 2607 | |
| 2608 /* Make sure we find out about bad make_string_nocopy's when they happen */ | |
| 800 | 2609 #if defined (ERROR_CHECK_TEXT) && defined (MULE) |
| 428 | 2610 bytecount_to_charcount (contents, length); /* Just for the assertions */ |
| 2611 #endif | |
| 2612 | |
| 2613 /* Allocate the string header */ | |
| 438 | 2614 ALLOCATE_FIXED_TYPE (string, Lisp_String, s); |
| 771 | 2615 set_lheader_implementation (&s->u.lheader, &lrecord_string); |
| 2616 SET_C_READONLY_RECORD_HEADER (&s->u.lheader); | |
| 428 | 2617 s->plist = Qnil; |
| 867 | 2618 set_lispstringp_data (s, (Ibyte *) contents); |
| 826 | 2619 set_lispstringp_length (s, length); |
| 793 | 2620 val = wrap_string (s); |
| 771 | 2621 init_string_ascii_begin (val); |
| 2622 sledgehammer_check_ascii_begin (val); | |
| 2623 | |
| 428 | 2624 return val; |
| 2625 } | |
| 2626 | |
| 2627 | |
| 2628 /************************************************************************/ | |
| 2629 /* lcrecord lists */ | |
| 2630 /************************************************************************/ | |
| 2631 | |
| 2632 /* Lcrecord lists are used to manage the allocation of particular | |
| 1204 | 2633 sorts of lcrecords, to avoid calling basic_alloc_lcrecord() (and thus |
| 428 | 2634 malloc() and garbage-collection junk) as much as possible. |
| 2635 It is similar to the Blocktype class. | |
| 2636 | |
| 1204 | 2637 See detailed comment in lcrecord.h. |
| 2638 */ | |
| 2639 | |
| 2640 const struct memory_description free_description[] = { | |
| 2641 { XD_LISP_OBJECT, offsetof (struct free_lcrecord_header, chain), 0, 0, | |
| 2642 XD_FLAG_FREE_LISP_OBJECT }, | |
| 2643 { XD_END } | |
| 2644 }; | |
| 2645 | |
| 2646 DEFINE_LRECORD_IMPLEMENTATION ("free", free, | |
| 2647 0, /*dumpable-flag*/ | |
| 2648 0, internal_object_printer, | |
| 2649 0, 0, 0, free_description, | |
| 2650 struct free_lcrecord_header); | |
| 2651 | |
| 2652 const struct memory_description lcrecord_list_description[] = { | |
| 2653 { XD_LISP_OBJECT, offsetof (struct lcrecord_list, free), 0, 0, | |
| 2654 XD_FLAG_FREE_LISP_OBJECT }, | |
| 2655 { XD_END } | |
| 2656 }; | |
| 428 | 2657 |
| 2658 static Lisp_Object | |
| 2659 mark_lcrecord_list (Lisp_Object obj) | |
| 2660 { | |
| 2661 struct lcrecord_list *list = XLCRECORD_LIST (obj); | |
| 2662 Lisp_Object chain = list->free; | |
| 2663 | |
| 2664 while (!NILP (chain)) | |
| 2665 { | |
| 2666 struct lrecord_header *lheader = XRECORD_LHEADER (chain); | |
| 2667 struct free_lcrecord_header *free_header = | |
| 2668 (struct free_lcrecord_header *) lheader; | |
| 2669 | |
| 442 | 2670 gc_checking_assert |
| 2671 (/* There should be no other pointers to the free list. */ | |
| 2672 ! MARKED_RECORD_HEADER_P (lheader) | |
| 2673 && | |
| 2674 /* Only lcrecords should be here. */ | |
| 1204 | 2675 ! list->implementation->basic_p |
| 442 | 2676 && |
| 2677 /* Only free lcrecords should be here. */ | |
| 2678 free_header->lcheader.free | |
| 2679 && | |
| 2680 /* The type of the lcrecord must be right. */ | |
| 1204 | 2681 lheader->type == lrecord_type_free |
| 442 | 2682 && |
| 2683 /* So must the size. */ | |
| 1204 | 2684 (list->implementation->static_size == 0 || |
| 2685 list->implementation->static_size == list->size) | |
| 442 | 2686 ); |
| 428 | 2687 |
| 2688 MARK_RECORD_HEADER (lheader); | |
| 2689 chain = free_header->chain; | |
| 2690 } | |
| 2691 | |
| 2692 return Qnil; | |
| 2693 } | |
| 2694 | |
| 934 | 2695 DEFINE_LRECORD_IMPLEMENTATION ("lcrecord-list", lcrecord_list, |
| 2696 0, /*dumpable-flag*/ | |
| 2697 mark_lcrecord_list, internal_object_printer, | |
| 1204 | 2698 0, 0, 0, lcrecord_list_description, |
| 2699 struct lcrecord_list); | |
| 934 | 2700 |
| 428 | 2701 Lisp_Object |
| 665 | 2702 make_lcrecord_list (Elemcount size, |
| 442 | 2703 const struct lrecord_implementation *implementation) |
| 428 | 2704 { |
| 1204 | 2705 /* Don't use alloc_lcrecord_type() avoid infinite recursion |
| 2706 allocating this, */ | |
| 2707 struct lcrecord_list *p = (struct lcrecord_list *) | |
| 2708 basic_alloc_lcrecord (sizeof (struct lcrecord_list), | |
| 2709 &lrecord_lcrecord_list); | |
| 428 | 2710 |
| 2711 p->implementation = implementation; | |
| 2712 p->size = size; | |
| 2713 p->free = Qnil; | |
| 793 | 2714 return wrap_lcrecord_list (p); |
| 428 | 2715 } |
| 2716 | |
| 2717 Lisp_Object | |
| 1204 | 2718 alloc_managed_lcrecord (Lisp_Object lcrecord_list) |
| 428 | 2719 { |
| 2720 struct lcrecord_list *list = XLCRECORD_LIST (lcrecord_list); | |
| 2721 if (!NILP (list->free)) | |
| 2722 { | |
| 2723 Lisp_Object val = list->free; | |
| 2724 struct free_lcrecord_header *free_header = | |
| 2725 (struct free_lcrecord_header *) XPNTR (val); | |
| 1204 | 2726 struct lrecord_header *lheader = &free_header->lcheader.lheader; |
| 428 | 2727 |
| 2728 #ifdef ERROR_CHECK_GC | |
| 1204 | 2729 /* Major overkill here. */ |
| 428 | 2730 /* There should be no other pointers to the free list. */ |
| 442 | 2731 assert (! MARKED_RECORD_HEADER_P (lheader)); |
| 428 | 2732 /* Only free lcrecords should be here. */ |
| 2733 assert (free_header->lcheader.free); | |
| 1204 | 2734 assert (lheader->type == lrecord_type_free); |
| 2735 /* Only lcrecords should be here. */ | |
| 2736 assert (! (list->implementation->basic_p)); | |
| 2737 #if 0 /* Not used anymore, now that we set the type of the header to | |
| 2738 lrecord_type_free. */ | |
| 428 | 2739 /* The type of the lcrecord must be right. */ |
| 442 | 2740 assert (LHEADER_IMPLEMENTATION (lheader) == list->implementation); |
| 1204 | 2741 #endif /* 0 */ |
| 428 | 2742 /* So must the size. */ |
| 1204 | 2743 assert (list->implementation->static_size == 0 || |
| 2744 list->implementation->static_size == list->size); | |
| 428 | 2745 #endif /* ERROR_CHECK_GC */ |
| 442 | 2746 |
| 428 | 2747 list->free = free_header->chain; |
| 2748 free_header->lcheader.free = 0; | |
| 1204 | 2749 /* Put back the correct type, as we set it to lrecord_type_free. */ |
| 2750 lheader->type = list->implementation->lrecord_type_index; | |
| 2751 zero_sized_lcrecord (free_header, list->size); | |
| 428 | 2752 return val; |
| 2753 } | |
| 2754 else | |
| 1204 | 2755 return wrap_pointer_1 (basic_alloc_lcrecord (list->size, |
| 2756 list->implementation)); | |
| 428 | 2757 } |
| 2758 | |
| 771 | 2759 /* "Free" a Lisp object LCRECORD by placing it on its associated free list |
| 1204 | 2760 LCRECORD_LIST; next time alloc_managed_lcrecord() is called with the |
| 771 | 2761 same LCRECORD_LIST as its parameter, it will return an object from the |
| 2762 free list, which may be this one. Be VERY VERY SURE there are no | |
| 2763 pointers to this object hanging around anywhere where they might be | |
| 2764 used! | |
| 2765 | |
| 2766 The first thing this does before making any global state change is to | |
| 2767 call the finalize method of the object, if it exists. */ | |
| 2768 | |
| 428 | 2769 void |
| 2770 free_managed_lcrecord (Lisp_Object lcrecord_list, Lisp_Object lcrecord) | |
| 2771 { | |
| 2772 struct lcrecord_list *list = XLCRECORD_LIST (lcrecord_list); | |
| 2773 struct free_lcrecord_header *free_header = | |
| 2774 (struct free_lcrecord_header *) XPNTR (lcrecord); | |
| 442 | 2775 struct lrecord_header *lheader = &free_header->lcheader.lheader; |
| 2776 const struct lrecord_implementation *implementation | |
| 428 | 2777 = LHEADER_IMPLEMENTATION (lheader); |
| 2778 | |
| 771 | 2779 /* Finalizer methods may try to free objects within them, which typically |
| 2780 won't be marked and thus are scheduled for demolition. Putting them | |
| 2781 on the free list would be very bad, as we'd have xfree()d memory in | |
| 2782 the list. Even if for some reason the objects are still live | |
| 2783 (generally a logic error!), we still will have problems putting such | |
| 2784 an object on the free list right now (e.g. we'd have to avoid calling | |
| 2785 the finalizer twice, etc.). So basically, those finalizers should not | |
| 2786 be freeing any objects if during GC. Abort now to catch those | |
| 2787 problems. */ | |
| 2788 gc_checking_assert (!gc_in_progress); | |
| 2789 | |
| 428 | 2790 /* Make sure the size is correct. This will catch, for example, |
| 2791 putting a window configuration on the wrong free list. */ | |
| 1204 | 2792 gc_checking_assert (detagged_lisp_object_size (lheader) == list->size); |
| 771 | 2793 /* Make sure the object isn't already freed. */ |
| 2794 gc_checking_assert (!free_header->lcheader.free); | |
| 2795 | |
| 428 | 2796 if (implementation->finalizer) |
| 2797 implementation->finalizer (lheader, 0); | |
| 1204 | 2798 /* Yes, there are two ways to indicate freeness -- the type is |
| 2799 lrecord_type_free or the ->free flag is set. We used to do only the | |
| 2800 latter; now we do the former as well for KKCC purposes. Probably | |
| 2801 safer in any case, as we will lose quicker this way than keeping | |
| 2802 around an lrecord of apparently correct type but bogus junk in it. */ | |
| 2803 MARK_LRECORD_AS_FREE (lheader); | |
| 428 | 2804 free_header->chain = list->free; |
| 2805 free_header->lcheader.free = 1; | |
| 2806 list->free = lcrecord; | |
| 2807 } | |
| 2808 | |
| 771 | 2809 static Lisp_Object all_lcrecord_lists[countof (lrecord_implementations_table)]; |
| 2810 | |
| 2811 void * | |
| 2812 alloc_automanaged_lcrecord (Bytecount size, | |
| 2813 const struct lrecord_implementation *imp) | |
| 2814 { | |
| 2815 if (EQ (all_lcrecord_lists[imp->lrecord_type_index], Qzero)) | |
| 2816 all_lcrecord_lists[imp->lrecord_type_index] = | |
| 2817 make_lcrecord_list (size, imp); | |
| 2818 | |
| 1204 | 2819 return XPNTR (alloc_managed_lcrecord |
| 771 | 2820 (all_lcrecord_lists[imp->lrecord_type_index])); |
| 2821 } | |
| 2822 | |
| 2823 void | |
| 2824 free_lcrecord (Lisp_Object rec) | |
| 2825 { | |
| 2826 int type = XRECORD_LHEADER (rec)->type; | |
| 2827 | |
| 2828 assert (!EQ (all_lcrecord_lists[type], Qzero)); | |
| 2829 | |
| 2830 free_managed_lcrecord (all_lcrecord_lists[type], rec); | |
| 2831 } | |
| 428 | 2832 |
| 2833 | |
| 2834 DEFUN ("purecopy", Fpurecopy, 1, 1, 0, /* | |
| 2835 Kept for compatibility, returns its argument. | |
| 2836 Old: | |
| 2837 Make a copy of OBJECT in pure storage. | |
| 2838 Recursively copies contents of vectors and cons cells. | |
| 2839 Does not copy symbols. | |
| 2840 */ | |
| 444 | 2841 (object)) |
| 428 | 2842 { |
| 444 | 2843 return object; |
| 428 | 2844 } |
| 2845 | |
| 2846 | |
| 2847 /************************************************************************/ | |
| 2848 /* Garbage Collection */ | |
| 2849 /************************************************************************/ | |
| 2850 | |
| 442 | 2851 /* All the built-in lisp object types are enumerated in `enum lrecord_type'. |
| 2852 Additional ones may be defined by a module (none yet). We leave some | |
| 2853 room in `lrecord_implementations_table' for such new lisp object types. */ | |
| 647 | 2854 const struct lrecord_implementation *lrecord_implementations_table[(int)lrecord_type_last_built_in_type + MODULE_DEFINABLE_TYPE_COUNT]; |
| 2855 int lrecord_type_count = lrecord_type_last_built_in_type; | |
| 1676 | 2856 #ifndef USE_KKCC |
| 442 | 2857 /* Object marker functions are in the lrecord_implementation structure. |
| 2858 But copying them to a parallel array is much more cache-friendly. | |
| 2859 This hack speeds up (garbage-collect) by about 5%. */ | |
| 2860 Lisp_Object (*lrecord_markers[countof (lrecord_implementations_table)]) (Lisp_Object); | |
| 1676 | 2861 #endif /* not USE_KKCC */ |
| 428 | 2862 |
| 2863 struct gcpro *gcprolist; | |
| 2864 | |
| 771 | 2865 /* We want the staticpro list relocated, but not the pointers found |
| 2866 therein, because they refer to locations in the global data segment, not | |
| 2867 in the heap; we only dump heap objects. Hence we use a trivial | |
| 2868 description, as for pointerless objects. (Note that the data segment | |
| 2869 objects, which are global variables like Qfoo or Vbar, themselves are | |
| 2870 pointers to heap objects. Each needs to be described to pdump as a | |
| 2871 "root pointer"; this happens in the call to staticpro(). */ | |
| 1204 | 2872 static const struct memory_description staticpro_description_1[] = { |
| 452 | 2873 { XD_END } |
| 2874 }; | |
| 2875 | |
| 1204 | 2876 static const struct sized_memory_description staticpro_description = { |
| 452 | 2877 sizeof (Lisp_Object *), |
| 2878 staticpro_description_1 | |
| 2879 }; | |
| 2880 | |
| 1204 | 2881 static const struct memory_description staticpros_description_1[] = { |
| 452 | 2882 XD_DYNARR_DESC (Lisp_Object_ptr_dynarr, &staticpro_description), |
| 2883 { XD_END } | |
| 2884 }; | |
| 2885 | |
| 1204 | 2886 static const struct sized_memory_description staticpros_description = { |
| 452 | 2887 sizeof (Lisp_Object_ptr_dynarr), |
| 2888 staticpros_description_1 | |
| 2889 }; | |
| 2890 | |
| 771 | 2891 #ifdef DEBUG_XEMACS |
| 2892 | |
| 1204 | 2893 static const struct memory_description staticpro_one_name_description_1[] = { |
| 771 | 2894 { XD_C_STRING, 0 }, |
| 2895 { XD_END } | |
| 2896 }; | |
| 2897 | |
| 1204 | 2898 static const struct sized_memory_description staticpro_one_name_description = { |
| 771 | 2899 sizeof (char *), |
| 2900 staticpro_one_name_description_1 | |
| 2901 }; | |
| 2902 | |
| 1204 | 2903 static const struct memory_description staticpro_names_description_1[] = { |
| 771 | 2904 XD_DYNARR_DESC (char_ptr_dynarr, &staticpro_one_name_description), |
| 2905 { XD_END } | |
| 2906 }; | |
| 2907 | |
| 1204 | 2908 |
| 2909 extern const struct sized_memory_description staticpro_names_description; | |
| 2910 | |
| 2911 const struct sized_memory_description staticpro_names_description = { | |
| 771 | 2912 sizeof (char_ptr_dynarr), |
| 2913 staticpro_names_description_1 | |
| 2914 }; | |
| 2915 | |
| 2916 /* Help debug crashes gc-marking a staticpro'ed object. */ | |
| 2917 | |
| 2918 Lisp_Object_ptr_dynarr *staticpros; | |
| 2919 char_ptr_dynarr *staticpro_names; | |
| 2920 | |
| 2921 /* Mark the Lisp_Object at non-heap VARADDRESS as a root object for | |
| 2922 garbage collection, and for dumping. */ | |
| 2923 void | |
| 2924 staticpro_1 (Lisp_Object *varaddress, char *varname) | |
| 2925 { | |
| 2926 Dynarr_add (staticpros, varaddress); | |
| 2927 Dynarr_add (staticpro_names, varname); | |
| 1204 | 2928 dump_add_root_lisp_object (varaddress); |
| 771 | 2929 } |
| 2930 | |
| 2931 | |
| 2932 Lisp_Object_ptr_dynarr *staticpros_nodump; | |
| 2933 char_ptr_dynarr *staticpro_nodump_names; | |
| 2934 | |
| 2935 /* Mark the Lisp_Object at heap VARADDRESS as a root object for | |
| 2936 garbage collection, but not for dumping. (See below.) */ | |
| 2937 void | |
| 2938 staticpro_nodump_1 (Lisp_Object *varaddress, char *varname) | |
| 2939 { | |
| 2940 Dynarr_add (staticpros_nodump, varaddress); | |
| 2941 Dynarr_add (staticpro_nodump_names, varname); | |
| 2942 } | |
| 2943 | |
| 996 | 2944 #ifdef HAVE_SHLIB |
| 2945 /* Stop treating the Lisp_Object at non-heap VARADDRESS as a root object | |
| 2946 for garbage collection, but not for dumping. */ | |
| 2947 void | |
| 2948 unstaticpro_nodump_1 (Lisp_Object *varaddress, char *varname) | |
| 2949 { | |
| 2950 Dynarr_delete_object (staticpros, varaddress); | |
| 2951 Dynarr_delete_object (staticpro_names, varname); | |
| 2952 } | |
| 2953 #endif | |
| 2954 | |
| 771 | 2955 #else /* not DEBUG_XEMACS */ |
| 2956 | |
| 452 | 2957 Lisp_Object_ptr_dynarr *staticpros; |
| 2958 | |
| 2959 /* Mark the Lisp_Object at non-heap VARADDRESS as a root object for | |
| 2960 garbage collection, and for dumping. */ | |
| 428 | 2961 void |
| 2962 staticpro (Lisp_Object *varaddress) | |
| 2963 { | |
| 452 | 2964 Dynarr_add (staticpros, varaddress); |
| 1204 | 2965 dump_add_root_lisp_object (varaddress); |
| 428 | 2966 } |
| 2967 | |
| 442 | 2968 |
| 452 | 2969 Lisp_Object_ptr_dynarr *staticpros_nodump; |
| 2970 | |
| 771 | 2971 /* Mark the Lisp_Object at heap VARADDRESS as a root object for garbage |
| 2972 collection, but not for dumping. This is used for objects where the | |
| 2973 only sure pointer is in the heap (rather than in the global data | |
| 2974 segment, as must be the case for pdump root pointers), but not inside of | |
| 2975 another Lisp object (where it will be marked as a result of that Lisp | |
| 2976 object's mark method). The call to staticpro_nodump() must occur *BOTH* | |
| 2977 at initialization time and at "reinitialization" time (startup, after | |
| 2978 pdump load.) (For example, this is the case with the predicate symbols | |
| 2979 for specifier and coding system types. The pointer to this symbol is | |
| 2980 inside of a methods structure, which is allocated on the heap. The | |
| 2981 methods structure will be written out to the pdump data file, and may be | |
| 2982 reloaded at a different address.) | |
| 2983 | |
| 2984 #### The necessity for reinitialization is a bug in pdump. Pdump should | |
| 2985 automatically regenerate the staticpro()s for these symbols when it | |
| 2986 loads the data in. */ | |
| 2987 | |
| 428 | 2988 void |
| 2989 staticpro_nodump (Lisp_Object *varaddress) | |
| 2990 { | |
| 452 | 2991 Dynarr_add (staticpros_nodump, varaddress); |
| 428 | 2992 } |
| 2993 | |
| 996 | 2994 #ifdef HAVE_SHLIB |
| 2995 /* Unmark the Lisp_Object at non-heap VARADDRESS as a root object for | |
| 2996 garbage collection, but not for dumping. */ | |
| 2997 void | |
| 2998 unstaticpro_nodump (Lisp_Object *varaddress) | |
| 2999 { | |
| 3000 Dynarr_delete_object (staticpros, varaddress); | |
| 3001 } | |
| 3002 #endif | |
| 3003 | |
| 771 | 3004 #endif /* not DEBUG_XEMACS */ |
| 3005 | |
| 442 | 3006 #ifdef ERROR_CHECK_GC |
| 3007 #define GC_CHECK_LHEADER_INVARIANTS(lheader) do { \ | |
| 3008 struct lrecord_header * GCLI_lh = (lheader); \ | |
| 3009 assert (GCLI_lh != 0); \ | |
| 647 | 3010 assert (GCLI_lh->type < (unsigned int) lrecord_type_count); \ |
| 442 | 3011 assert (! C_READONLY_RECORD_HEADER_P (GCLI_lh) || \ |
| 3012 (MARKED_RECORD_HEADER_P (GCLI_lh) && \ | |
| 3013 LISP_READONLY_RECORD_HEADER_P (GCLI_lh))); \ | |
| 3014 } while (0) | |
| 3015 #else | |
| 3016 #define GC_CHECK_LHEADER_INVARIANTS(lheader) | |
| 3017 #endif | |
| 3018 | |
| 934 | 3019 |
| 1204 | 3020 static const struct memory_description lisp_object_description_1[] = { |
| 3021 { XD_LISP_OBJECT, 0 }, | |
| 3022 { XD_END } | |
| 3023 }; | |
| 3024 | |
| 3025 const struct sized_memory_description lisp_object_description = { | |
| 3026 sizeof (Lisp_Object), | |
| 3027 lisp_object_description_1 | |
| 3028 }; | |
| 3029 | |
| 3030 #if defined (USE_KKCC) || defined (PDUMP) | |
| 934 | 3031 |
| 3032 /* This function extracts the value of a count variable described somewhere | |
| 3033 else in the description. It is converted corresponding to the type */ | |
| 1204 | 3034 EMACS_INT |
| 3035 lispdesc_indirect_count_1 (EMACS_INT code, | |
| 3036 const struct memory_description *idesc, | |
| 3037 const void *idata) | |
| 934 | 3038 { |
| 3039 EMACS_INT count; | |
| 3040 const void *irdata; | |
| 3041 | |
| 3042 int line = XD_INDIRECT_VAL (code); | |
| 3043 int delta = XD_INDIRECT_DELTA (code); | |
| 3044 | |
| 1204 | 3045 irdata = ((char *) idata) + |
| 3046 lispdesc_indirect_count (idesc[line].offset, idesc, idata); | |
| 934 | 3047 switch (idesc[line].type) |
| 3048 { | |
| 3049 case XD_BYTECOUNT: | |
| 1204 | 3050 count = * (Bytecount *) irdata; |
| 934 | 3051 break; |
| 3052 case XD_ELEMCOUNT: | |
| 1204 | 3053 count = * (Elemcount *) irdata; |
| 934 | 3054 break; |
| 3055 case XD_HASHCODE: | |
| 1204 | 3056 count = * (Hashcode *) irdata; |
| 934 | 3057 break; |
| 3058 case XD_INT: | |
| 1204 | 3059 count = * (int *) irdata; |
| 934 | 3060 break; |
| 3061 case XD_LONG: | |
| 1204 | 3062 count = * (long *) irdata; |
| 934 | 3063 break; |
| 3064 default: | |
| 3065 stderr_out ("Unsupported count type : %d (line = %d, code = %ld)\n", | |
| 1204 | 3066 idesc[line].type, line, (long) code); |
| 3067 #ifdef PDUMP | |
| 3068 if (in_pdump) | |
| 3069 pdump_backtrace (); | |
| 3070 #endif | |
| 934 | 3071 count = 0; /* warning suppression */ |
| 3072 abort (); | |
| 3073 } | |
| 3074 count += delta; | |
| 3075 return count; | |
| 3076 } | |
| 3077 | |
| 1204 | 3078 /* SDESC is a "description map" (basically, a list of offsets used for |
| 3079 successive indirections) and OBJ is the first object to indirect off of. | |
| 3080 Return the description ultimately found. */ | |
| 3081 | |
| 3082 const struct sized_memory_description * | |
| 3083 lispdesc_indirect_description_1 (const void *obj, | |
| 3084 const struct sized_memory_description *sdesc) | |
| 934 | 3085 { |
| 3086 int pos; | |
| 3087 | |
| 1204 | 3088 for (pos = 0; sdesc[pos].size >= 0; pos++) |
| 3089 obj = * (const void **) ((const char *) obj + sdesc[pos].size); | |
| 3090 | |
| 3091 return (const struct sized_memory_description *) obj; | |
| 3092 } | |
| 3093 | |
| 3094 /* Compute the size of the data at RDATA, described by a single entry | |
| 3095 DESC1 in a description array. OBJ and DESC are used for | |
| 3096 XD_INDIRECT references. */ | |
| 3097 | |
| 3098 static Bytecount | |
| 3099 lispdesc_one_description_line_size (void *rdata, | |
| 3100 const struct memory_description *desc1, | |
| 3101 const void *obj, | |
| 3102 const struct memory_description *desc) | |
| 3103 { | |
| 3104 union_switcheroo: | |
| 3105 switch (desc1->type) | |
| 934 | 3106 { |
| 1204 | 3107 case XD_LISP_OBJECT_ARRAY: |
| 3108 { | |
| 3109 EMACS_INT val = lispdesc_indirect_count (desc1->data1, desc, obj); | |
| 3110 return (val * sizeof (Lisp_Object)); | |
| 3111 } | |
| 3112 case XD_LISP_OBJECT: | |
| 3113 case XD_LO_LINK: | |
| 3114 return sizeof (Lisp_Object); | |
| 3115 case XD_OPAQUE_PTR: | |
| 3116 return sizeof (void *); | |
| 3117 case XD_STRUCT_PTR: | |
| 3118 { | |
| 3119 EMACS_INT val = lispdesc_indirect_count (desc1->data1, desc, obj); | |
| 3120 return val * sizeof (void *); | |
| 3121 } | |
| 3122 case XD_STRUCT_ARRAY: | |
| 3123 { | |
| 3124 EMACS_INT val = lispdesc_indirect_count (desc1->data1, desc, obj); | |
| 3125 | |
| 3126 return (val * | |
| 3127 lispdesc_structure_size | |
| 3128 (rdata, lispdesc_indirect_description (obj, desc1->data2))); | |
| 3129 } | |
| 3130 case XD_OPAQUE_DATA_PTR: | |
| 3131 return sizeof (void *); | |
| 3132 case XD_UNION_DYNAMIC_SIZE: | |
| 3133 { | |
| 3134 /* If an explicit size was given in the first-level structure | |
| 3135 description, use it; else compute size based on current union | |
| 3136 constant. */ | |
| 3137 const struct sized_memory_description *sdesc = | |
| 3138 lispdesc_indirect_description (obj, desc1->data2); | |
| 3139 if (sdesc->size) | |
| 3140 return sdesc->size; | |
| 3141 else | |
| 3142 { | |
| 3143 desc1 = lispdesc_process_xd_union (desc1, desc, obj); | |
| 3144 if (desc1) | |
| 3145 goto union_switcheroo; | |
| 934 | 3146 break; |
| 1204 | 3147 } |
| 3148 } | |
| 3149 case XD_UNION: | |
| 3150 { | |
| 3151 /* If an explicit size was given in the first-level structure | |
| 3152 description, use it; else compute size based on maximum of all | |
| 3153 possible structures. */ | |
| 3154 const struct sized_memory_description *sdesc = | |
| 3155 lispdesc_indirect_description (obj, desc1->data2); | |
| 3156 if (sdesc->size) | |
| 3157 return sdesc->size; | |
| 3158 else | |
| 3159 { | |
| 3160 int count; | |
| 3161 Bytecount max_size = -1, size; | |
| 3162 | |
| 3163 desc1 = sdesc->description; | |
| 3164 | |
| 3165 for (count = 0; desc1[count].type != XD_END; count++) | |
| 3166 { | |
| 3167 size = lispdesc_one_description_line_size (rdata, | |
| 3168 &desc1[count], | |
| 3169 obj, desc); | |
| 3170 if (size > max_size) | |
| 3171 max_size = size; | |
| 3172 } | |
| 3173 return max_size; | |
| 3174 } | |
| 934 | 3175 } |
| 1204 | 3176 case XD_C_STRING: |
| 3177 return sizeof (void *); | |
| 3178 case XD_DOC_STRING: | |
| 3179 return sizeof (void *); | |
| 3180 case XD_INT_RESET: | |
| 3181 return sizeof (int); | |
| 3182 case XD_BYTECOUNT: | |
| 3183 return sizeof (Bytecount); | |
| 3184 case XD_ELEMCOUNT: | |
| 3185 return sizeof (Elemcount); | |
| 3186 case XD_HASHCODE: | |
| 3187 return sizeof (Hashcode); | |
| 3188 case XD_INT: | |
| 3189 return sizeof (int); | |
| 3190 case XD_LONG: | |
| 3191 return sizeof (long); | |
| 3192 default: | |
| 3193 stderr_out ("Unsupported dump type : %d\n", desc1->type); | |
| 3194 abort (); | |
| 934 | 3195 } |
| 3196 | |
| 1204 | 3197 return 0; |
| 934 | 3198 } |
| 3199 | |
| 3200 | |
| 1204 | 3201 /* Return the size of the memory block (NOT necessarily a structure!) |
| 3202 described by SDESC and pointed to by OBJ. If SDESC records an | |
| 3203 explicit size (i.e. non-zero), it is simply returned; otherwise, | |
| 3204 the size is calculated by the maximum offset and the size of the | |
| 3205 object at that offset, rounded up to the maximum alignment. In | |
| 3206 this case, we may need the object, for example when retrieving an | |
| 3207 "indirect count" of an inlined array (the count is not constant, | |
| 3208 but is specified by one of the elements of the memory block). (It | |
| 3209 is generally not a problem if we return an overly large size -- we | |
| 3210 will simply end up reserving more space than necessary; but if the | |
| 3211 size is too small we could be in serious trouble, in particular | |
| 3212 with nested inlined structures, where there may be alignment | |
| 3213 padding in the middle of a block. #### In fact there is an (at | |
| 3214 least theoretical) problem with an overly large size -- we may | |
| 3215 trigger a protection fault when reading from invalid memory. We | |
| 3216 need to handle this -- perhaps in a stupid but dependable way, | |
| 3217 i.e. by trapping SIGSEGV and SIGBUS.) */ | |
| 3218 | |
| 3219 Bytecount | |
| 3220 lispdesc_structure_size (const void *obj, | |
| 3221 const struct sized_memory_description *sdesc) | |
| 934 | 3222 { |
| 1204 | 3223 EMACS_INT max_offset = -1; |
| 934 | 3224 int max_offset_pos = -1; |
| 3225 int pos; | |
| 1204 | 3226 const struct memory_description *desc; |
| 934 | 3227 |
| 3228 if (sdesc->size) | |
| 3229 return sdesc->size; | |
| 3230 | |
| 3231 desc = sdesc->description; | |
| 3232 | |
| 3233 for (pos = 0; desc[pos].type != XD_END; pos++) | |
| 3234 { | |
| 1204 | 3235 EMACS_INT offset = lispdesc_indirect_count (desc[pos].offset, desc, obj); |
| 3236 if (offset == max_offset) | |
| 934 | 3237 { |
| 3238 stderr_out ("Two relocatable elements at same offset?\n"); | |
| 3239 abort (); | |
| 3240 } | |
| 1204 | 3241 else if (offset > max_offset) |
| 934 | 3242 { |
| 1204 | 3243 max_offset = offset; |
| 934 | 3244 max_offset_pos = pos; |
| 3245 } | |
| 3246 } | |
| 3247 | |
| 3248 if (max_offset_pos < 0) | |
| 3249 return 0; | |
| 3250 | |
| 1204 | 3251 { |
| 3252 Bytecount size_at_max; | |
| 3253 size_at_max = | |
| 3254 lispdesc_one_description_line_size ((char *) obj + max_offset, | |
| 3255 &desc[max_offset_pos], obj, desc); | |
| 3256 | |
| 3257 /* We have no way of knowing the required alignment for this structure, | |
| 3258 so just make it maximally aligned. */ | |
| 3259 return MAX_ALIGN_SIZE (max_offset + size_at_max); | |
| 3260 } | |
| 3261 } | |
| 3262 | |
| 3263 #endif /* defined (USE_KKCC) || defined (PDUMP) */ | |
| 3264 | |
| 1276 | 3265 #define GC_CHECK_NOT_FREE(lheader) \ |
| 3266 gc_checking_assert (LHEADER_IMPLEMENTATION (lheader)->basic_p || \ | |
| 3267 ! ((struct lcrecord_header *) lheader)->free) | |
| 3268 | |
| 1204 | 3269 #ifdef USE_KKCC |
| 3270 /* The following functions implement the new mark algorithm. | |
| 3271 They mark objects according to their descriptions. They | |
| 3272 are modeled on the corresponding pdumper procedures. */ | |
| 3273 | |
| 1676 | 3274 /* Object memory descriptions are in the lrecord_implementation structure. |
| 3275 But copying them to a parallel array is much more cache-friendly. */ | |
| 3276 const struct memory_description *lrecord_memory_descriptions[countof (lrecord_implementations_table)]; | |
| 3277 | |
| 3278 /* the initial stack size in kkcc_gc_stack_entries */ | |
| 3279 #define KKCC_INIT_GC_STACK_SIZE 16384 | |
| 3280 | |
| 3281 typedef struct | |
| 3282 { | |
| 3283 void *data; | |
| 3284 const struct memory_description *desc; | |
| 3285 } kkcc_gc_stack_entry; | |
| 3286 | |
| 3287 static kkcc_gc_stack_entry *kkcc_gc_stack_ptr; | |
| 3288 static kkcc_gc_stack_entry *kkcc_gc_stack_top; | |
| 3289 static kkcc_gc_stack_entry *kkcc_gc_stack_last_entry; | |
| 3290 static int kkcc_gc_stack_size; | |
| 3291 | |
| 3292 static void | |
| 3293 kkcc_gc_stack_init (void) | |
| 3294 { | |
| 3295 kkcc_gc_stack_size = KKCC_INIT_GC_STACK_SIZE; | |
| 3296 kkcc_gc_stack_ptr = (kkcc_gc_stack_entry *) | |
| 3297 malloc (kkcc_gc_stack_size * sizeof (kkcc_gc_stack_entry)); | |
| 3298 if (!kkcc_gc_stack_ptr) | |
| 3299 { | |
| 3300 stderr_out ("stack init failed for size %d\n", kkcc_gc_stack_size); | |
| 3301 exit(23); | |
| 3302 } | |
| 3303 kkcc_gc_stack_top = kkcc_gc_stack_ptr - 1; | |
| 3304 kkcc_gc_stack_last_entry = kkcc_gc_stack_ptr + kkcc_gc_stack_size - 1; | |
| 3305 } | |
| 3306 | |
| 3307 static void | |
| 3308 kkcc_gc_stack_free (void) | |
| 3309 { | |
| 3310 free (kkcc_gc_stack_ptr); | |
| 3311 kkcc_gc_stack_ptr = 0; | |
| 3312 kkcc_gc_stack_top = 0; | |
| 3313 kkcc_gc_stack_size = 0; | |
| 3314 } | |
| 3315 | |
| 3316 static void | |
| 3317 kkcc_gc_stack_realloc (void) | |
| 3318 { | |
| 3319 int current_offset = (int)(kkcc_gc_stack_top - kkcc_gc_stack_ptr); | |
| 3320 kkcc_gc_stack_size *= 2; | |
| 3321 kkcc_gc_stack_ptr = (kkcc_gc_stack_entry *) | |
| 3322 realloc (kkcc_gc_stack_ptr, | |
| 3323 kkcc_gc_stack_size * sizeof (kkcc_gc_stack_entry)); | |
| 3324 if (!kkcc_gc_stack_ptr) | |
| 3325 { | |
| 3326 stderr_out ("stack realloc failed for size %d\n", kkcc_gc_stack_size); | |
| 3327 exit(23); | |
| 3328 } | |
| 3329 kkcc_gc_stack_top = kkcc_gc_stack_ptr + current_offset; | |
| 3330 kkcc_gc_stack_last_entry = kkcc_gc_stack_ptr + kkcc_gc_stack_size - 1; | |
| 3331 } | |
| 3332 | |
| 3333 #define KKCC_GC_STACK_FULL (kkcc_gc_stack_top >= kkcc_gc_stack_last_entry) | |
| 3334 #define KKCC_GC_STACK_EMPTY (kkcc_gc_stack_top < kkcc_gc_stack_ptr) | |
| 3335 | |
| 3336 static void | |
| 3337 kkcc_gc_stack_push (void *data, const struct memory_description *desc) | |
| 3338 { | |
| 3339 if (KKCC_GC_STACK_FULL) | |
| 3340 kkcc_gc_stack_realloc(); | |
| 3341 kkcc_gc_stack_top++; | |
| 3342 kkcc_gc_stack_top->data = data; | |
| 3343 kkcc_gc_stack_top->desc = desc; | |
| 3344 } | |
| 3345 | |
| 3346 static kkcc_gc_stack_entry * | |
| 3347 kkcc_gc_stack_pop (void) | |
| 3348 { | |
| 3349 if (KKCC_GC_STACK_EMPTY) | |
| 3350 return 0; | |
| 3351 kkcc_gc_stack_top--; | |
| 3352 return kkcc_gc_stack_top + 1; | |
| 3353 } | |
| 3354 | |
| 3355 void | |
| 3356 kkcc_gc_stack_push_lisp_object (Lisp_Object obj) | |
| 3357 { | |
| 3358 if (XTYPE (obj) == Lisp_Type_Record) | |
| 3359 { | |
| 3360 struct lrecord_header *lheader = XRECORD_LHEADER (obj); | |
| 3361 const struct memory_description *desc; | |
| 3362 GC_CHECK_LHEADER_INVARIANTS (lheader); | |
| 3363 desc = RECORD_DESCRIPTION (lheader); | |
| 3364 if (! MARKED_RECORD_HEADER_P (lheader)) | |
| 3365 { | |
| 3366 MARK_RECORD_HEADER (lheader); | |
| 3367 kkcc_gc_stack_push((void*) lheader, desc); | |
| 3368 } | |
| 3369 } | |
| 3370 } | |
| 3371 | |
| 1265 | 3372 #ifdef ERROR_CHECK_GC |
| 3373 #define KKCC_DO_CHECK_FREE(obj, allow_free) \ | |
| 3374 do \ | |
| 3375 { \ | |
| 3376 if (!allow_free && XTYPE (obj) == Lisp_Type_Record) \ | |
| 3377 { \ | |
| 3378 struct lrecord_header *lheader = XRECORD_LHEADER (obj); \ | |
| 3379 GC_CHECK_NOT_FREE (lheader); \ | |
| 3380 } \ | |
| 3381 } while (0) | |
| 3382 #else | |
| 3383 #define KKCC_DO_CHECK_FREE(obj, allow_free) | |
| 3384 #endif | |
| 1204 | 3385 |
| 3386 #ifdef ERROR_CHECK_GC | |
| 1598 | 3387 static void |
| 1204 | 3388 mark_object_maybe_checking_free (Lisp_Object obj, int allow_free) |
| 3389 { | |
| 1265 | 3390 KKCC_DO_CHECK_FREE (obj, allow_free); |
| 1598 | 3391 kkcc_gc_stack_push_lisp_object (obj); |
| 1204 | 3392 } |
| 3393 #else | |
| 1643 | 3394 #define mark_object_maybe_checking_free(obj, allow_free) \ |
| 3395 kkcc_gc_stack_push_lisp_object (obj) | |
| 1204 | 3396 #endif /* ERROR_CHECK_GC */ |
| 3397 | |
| 934 | 3398 |
| 3399 /* This function loops all elements of a struct pointer and calls | |
| 3400 mark_with_description with each element. */ | |
| 3401 static void | |
| 3402 mark_struct_contents (const void *data, | |
| 1204 | 3403 const struct sized_memory_description *sdesc, |
| 3404 int count) | |
| 934 | 3405 { |
| 3406 int i; | |
| 3407 Bytecount elsize; | |
| 1204 | 3408 elsize = lispdesc_structure_size (data, sdesc); |
| 934 | 3409 |
| 3410 for (i = 0; i < count; i++) | |
| 3411 { | |
| 1598 | 3412 kkcc_gc_stack_push (((char *) data) + elsize * i, sdesc->description); |
| 934 | 3413 } |
| 3414 } | |
| 3415 | |
| 1598 | 3416 |
| 3417 /* This function implements the KKCC mark algorithm. | |
| 3418 Instead of calling mark_object, all the alive Lisp_Objects are pushed | |
| 3419 on the kkcc_gc_stack. This function processes all elements on the stack | |
| 3420 according to their descriptions. */ | |
| 3421 static void | |
| 3422 kkcc_marking (void) | |
| 3423 { | |
| 3424 kkcc_gc_stack_entry *stack_entry = 0; | |
| 3425 void *data = 0; | |
| 3426 const struct memory_description *desc = 0; | |
| 3427 int pos; | |
| 3428 | |
| 3429 while ((stack_entry = kkcc_gc_stack_pop ()) != 0) | |
| 3430 { | |
| 3431 data = stack_entry->data; | |
| 3432 desc = stack_entry->desc; | |
| 3433 | |
| 3434 for (pos = 0; desc[pos].type != XD_END; pos++) | |
| 3435 { | |
| 3436 const struct memory_description *desc1 = &desc[pos]; | |
| 3437 const void *rdata = | |
| 3438 (const char *) data + lispdesc_indirect_count (desc1->offset, | |
| 3439 desc, data); | |
| 3440 union_switcheroo: | |
| 3441 | |
| 3442 /* If the flag says don't mark, then don't mark. */ | |
| 3443 if ((desc1->flags) & XD_FLAG_NO_KKCC) | |
| 3444 continue; | |
| 3445 | |
| 3446 switch (desc1->type) | |
| 3447 { | |
| 3448 case XD_BYTECOUNT: | |
| 3449 case XD_ELEMCOUNT: | |
| 3450 case XD_HASHCODE: | |
| 3451 case XD_INT: | |
| 3452 case XD_LONG: | |
| 3453 case XD_INT_RESET: | |
| 3454 case XD_LO_LINK: | |
| 3455 case XD_OPAQUE_PTR: | |
| 3456 case XD_OPAQUE_DATA_PTR: | |
| 3457 case XD_C_STRING: | |
| 3458 case XD_DOC_STRING: | |
| 3459 break; | |
| 3460 case XD_LISP_OBJECT: | |
| 3461 { | |
| 3462 const Lisp_Object *stored_obj = (const Lisp_Object *) rdata; | |
| 3463 | |
| 3464 /* Because of the way that tagged objects work (pointers and | |
| 3465 Lisp_Objects have the same representation), XD_LISP_OBJECT | |
| 3466 can be used for untagged pointers. They might be NULL, | |
| 3467 though. */ | |
| 3468 if (EQ (*stored_obj, Qnull_pointer)) | |
| 3469 break; | |
| 3470 mark_object_maybe_checking_free | |
| 3471 (*stored_obj, (desc1->flags) & XD_FLAG_FREE_LISP_OBJECT); | |
| 3472 | |
| 3473 break; | |
| 3474 } | |
| 3475 case XD_LISP_OBJECT_ARRAY: | |
| 3476 { | |
| 3477 int i; | |
| 3478 EMACS_INT count = | |
| 3479 lispdesc_indirect_count (desc1->data1, desc, data); | |
| 3480 | |
| 3481 for (i = 0; i < count; i++) | |
| 3482 { | |
| 3483 const Lisp_Object *stored_obj = | |
| 3484 (const Lisp_Object *) rdata + i; | |
| 3485 | |
| 3486 if (EQ (*stored_obj, Qnull_pointer)) | |
| 3487 break; | |
| 3488 | |
| 3489 mark_object_maybe_checking_free | |
| 3490 (*stored_obj, (desc1->flags) & XD_FLAG_FREE_LISP_OBJECT); | |
| 3491 } | |
| 3492 break; | |
| 3493 } | |
| 3494 case XD_STRUCT_PTR: | |
| 3495 { | |
| 3496 EMACS_INT count = lispdesc_indirect_count (desc1->data1, desc, | |
| 3497 data); | |
| 3498 const struct sized_memory_description *sdesc = | |
| 3499 lispdesc_indirect_description (data, desc1->data2); | |
| 3500 const char *dobj = * (const char **) rdata; | |
| 3501 if (dobj) | |
| 3502 mark_struct_contents (dobj, sdesc, count); | |
| 3503 break; | |
| 3504 } | |
| 3505 case XD_STRUCT_ARRAY: | |
| 3506 { | |
| 3507 EMACS_INT count = lispdesc_indirect_count (desc1->data1, desc, | |
| 3508 data); | |
| 3509 const struct sized_memory_description *sdesc = | |
| 3510 lispdesc_indirect_description (data, desc1->data2); | |
| 3511 | |
| 3512 mark_struct_contents (rdata, sdesc, count); | |
| 3513 break; | |
| 3514 } | |
| 3515 case XD_UNION: | |
| 3516 case XD_UNION_DYNAMIC_SIZE: | |
| 3517 desc1 = lispdesc_process_xd_union (desc1, desc, data); | |
| 3518 if (desc1) | |
| 3519 goto union_switcheroo; | |
| 3520 break; | |
| 3521 | |
| 3522 default: | |
| 3523 stderr_out ("Unsupported description type : %d\n", desc1->type); | |
| 3524 abort (); | |
| 3525 } | |
| 3526 } | |
| 3527 } | |
| 3528 } | |
| 934 | 3529 #endif /* USE_KKCC */ |
| 3530 | |
| 428 | 3531 /* Mark reference to a Lisp_Object. If the object referred to has not been |
| 3532 seen yet, recursively mark all the references contained in it. */ | |
| 3533 | |
| 3534 void | |
| 3535 mark_object (Lisp_Object obj) | |
| 3536 { | |
| 1598 | 3537 #ifdef USE_KKCC |
| 3538 /* this code should never be reached when configured for KKCC */ | |
| 3539 stderr_out ("KKCC: Invalid mark_object call.\n"); | |
| 3540 stderr_out ("Replace mark_object with kkcc_gc_stack_push_lisp_object.\n"); | |
| 3541 abort (); | |
| 1676 | 3542 #else /* not USE_KKCC */ |
| 1598 | 3543 |
| 428 | 3544 tail_recurse: |
| 3545 | |
| 3546 /* Checks we used to perform */ | |
| 3547 /* if (EQ (obj, Qnull_pointer)) return; */ | |
| 3548 /* if (!POINTER_TYPE_P (XGCTYPE (obj))) return; */ | |
| 3549 /* if (PURIFIED (XPNTR (obj))) return; */ | |
| 3550 | |
| 3551 if (XTYPE (obj) == Lisp_Type_Record) | |
| 3552 { | |
| 3553 struct lrecord_header *lheader = XRECORD_LHEADER (obj); | |
| 442 | 3554 |
| 3555 GC_CHECK_LHEADER_INVARIANTS (lheader); | |
| 3556 | |
| 1204 | 3557 /* We handle this separately, above, so we can mark free objects */ |
| 1265 | 3558 GC_CHECK_NOT_FREE (lheader); |
| 1204 | 3559 |
| 442 | 3560 /* All c_readonly objects have their mark bit set, |
| 3561 so that we only need to check the mark bit here. */ | |
| 3562 if (! MARKED_RECORD_HEADER_P (lheader)) | |
| 428 | 3563 { |
| 3564 MARK_RECORD_HEADER (lheader); | |
| 442 | 3565 |
| 1598 | 3566 if (RECORD_MARKER (lheader)) |
| 3567 { | |
| 3568 obj = RECORD_MARKER (lheader) (obj); | |
| 3569 if (!NILP (obj)) goto tail_recurse; | |
| 3570 } | |
| 428 | 3571 } |
| 3572 } | |
| 1676 | 3573 #endif /* not KKCC */ |
| 428 | 3574 } |
| 3575 | |
| 3576 | |
| 3577 static int gc_count_num_short_string_in_use; | |
| 647 | 3578 static Bytecount gc_count_string_total_size; |
| 3579 static Bytecount gc_count_short_string_total_size; | |
| 428 | 3580 |
| 3581 /* static int gc_count_total_records_used, gc_count_records_total_size; */ | |
| 3582 | |
| 3583 | |
| 3584 /* stats on lcrecords in use - kinda kludgy */ | |
| 3585 | |
| 3586 static struct | |
| 3587 { | |
| 3588 int instances_in_use; | |
| 3589 int bytes_in_use; | |
| 3590 int instances_freed; | |
| 3591 int bytes_freed; | |
| 3592 int instances_on_free_list; | |
| 707 | 3593 } lcrecord_stats [countof (lrecord_implementations_table) |
| 3594 + MODULE_DEFINABLE_TYPE_COUNT]; | |
| 428 | 3595 |
| 3596 static void | |
| 442 | 3597 tick_lcrecord_stats (const struct lrecord_header *h, int free_p) |
| 428 | 3598 { |
| 647 | 3599 int type_index = h->type; |
| 428 | 3600 |
| 3601 if (((struct lcrecord_header *) h)->free) | |
| 3602 { | |
| 442 | 3603 gc_checking_assert (!free_p); |
| 428 | 3604 lcrecord_stats[type_index].instances_on_free_list++; |
| 3605 } | |
| 3606 else | |
| 3607 { | |
| 1204 | 3608 Bytecount sz = detagged_lisp_object_size (h); |
| 3609 | |
| 428 | 3610 if (free_p) |
| 3611 { | |
| 3612 lcrecord_stats[type_index].instances_freed++; | |
| 3613 lcrecord_stats[type_index].bytes_freed += sz; | |
| 3614 } | |
| 3615 else | |
| 3616 { | |
| 3617 lcrecord_stats[type_index].instances_in_use++; | |
| 3618 lcrecord_stats[type_index].bytes_in_use += sz; | |
| 3619 } | |
| 3620 } | |
| 3621 } | |
| 3622 | |
| 3623 | |
| 3624 /* Free all unmarked records */ | |
| 3625 static void | |
| 3626 sweep_lcrecords_1 (struct lcrecord_header **prev, int *used) | |
| 3627 { | |
| 3628 struct lcrecord_header *header; | |
| 3629 int num_used = 0; | |
| 3630 /* int total_size = 0; */ | |
| 3631 | |
| 3632 xzero (lcrecord_stats); /* Reset all statistics to 0. */ | |
| 3633 | |
| 3634 /* First go through and call all the finalize methods. | |
| 3635 Then go through and free the objects. There used to | |
| 3636 be only one loop here, with the call to the finalizer | |
| 3637 occurring directly before the xfree() below. That | |
| 3638 is marginally faster but much less safe -- if the | |
| 3639 finalize method for an object needs to reference any | |
| 3640 other objects contained within it (and many do), | |
| 3641 we could easily be screwed by having already freed that | |
| 3642 other object. */ | |
| 3643 | |
| 3644 for (header = *prev; header; header = header->next) | |
| 3645 { | |
| 3646 struct lrecord_header *h = &(header->lheader); | |
| 442 | 3647 |
| 3648 GC_CHECK_LHEADER_INVARIANTS (h); | |
| 3649 | |
| 3650 if (! MARKED_RECORD_HEADER_P (h) && ! header->free) | |
| 428 | 3651 { |
| 3652 if (LHEADER_IMPLEMENTATION (h)->finalizer) | |
| 3653 LHEADER_IMPLEMENTATION (h)->finalizer (h, 0); | |
| 3654 } | |
| 3655 } | |
| 3656 | |
| 3657 for (header = *prev; header; ) | |
| 3658 { | |
| 3659 struct lrecord_header *h = &(header->lheader); | |
| 442 | 3660 if (MARKED_RECORD_HEADER_P (h)) |
| 428 | 3661 { |
| 442 | 3662 if (! C_READONLY_RECORD_HEADER_P (h)) |
| 428 | 3663 UNMARK_RECORD_HEADER (h); |
| 3664 num_used++; | |
| 3665 /* total_size += n->implementation->size_in_bytes (h);*/ | |
| 440 | 3666 /* #### May modify header->next on a C_READONLY lcrecord */ |
| 428 | 3667 prev = &(header->next); |
| 3668 header = *prev; | |
| 3669 tick_lcrecord_stats (h, 0); | |
| 3670 } | |
| 3671 else | |
| 3672 { | |
| 3673 struct lcrecord_header *next = header->next; | |
| 3674 *prev = next; | |
| 3675 tick_lcrecord_stats (h, 1); | |
| 3676 /* used to call finalizer right here. */ | |
| 1726 | 3677 xfree (header, struct lcrecord_header *); |
| 428 | 3678 header = next; |
| 3679 } | |
| 3680 } | |
| 3681 *used = num_used; | |
| 3682 /* *total = total_size; */ | |
| 3683 } | |
| 3684 | |
| 3685 /* And the Lord said: Thou shalt use the `c-backslash-region' command | |
| 3686 to make macros prettier. */ | |
| 3687 | |
| 3688 #ifdef ERROR_CHECK_GC | |
| 3689 | |
| 771 | 3690 #define SWEEP_FIXED_TYPE_BLOCK_1(typename, obj_type, lheader) \ |
| 428 | 3691 do { \ |
| 3692 struct typename##_block *SFTB_current; \ | |
| 3693 int SFTB_limit; \ | |
| 3694 int num_free = 0, num_used = 0; \ | |
| 3695 \ | |
| 444 | 3696 for (SFTB_current = current_##typename##_block, \ |
| 428 | 3697 SFTB_limit = current_##typename##_block_index; \ |
| 3698 SFTB_current; \ | |
| 3699 ) \ | |
| 3700 { \ | |
| 3701 int SFTB_iii; \ | |
| 3702 \ | |
| 3703 for (SFTB_iii = 0; SFTB_iii < SFTB_limit; SFTB_iii++) \ | |
| 3704 { \ | |
| 3705 obj_type *SFTB_victim = &(SFTB_current->block[SFTB_iii]); \ | |
| 3706 \ | |
| 454 | 3707 if (LRECORD_FREE_P (SFTB_victim)) \ |
| 428 | 3708 { \ |
| 3709 num_free++; \ | |
| 3710 } \ | |
| 3711 else if (C_READONLY_RECORD_HEADER_P (&SFTB_victim->lheader)) \ | |
| 3712 { \ | |
| 3713 num_used++; \ | |
| 3714 } \ | |
| 442 | 3715 else if (! MARKED_RECORD_HEADER_P (&SFTB_victim->lheader)) \ |
| 428 | 3716 { \ |
| 3717 num_free++; \ | |
| 3718 FREE_FIXED_TYPE (typename, obj_type, SFTB_victim); \ | |
| 3719 } \ | |
| 3720 else \ | |
| 3721 { \ | |
| 3722 num_used++; \ | |
| 3723 UNMARK_##typename (SFTB_victim); \ | |
| 3724 } \ | |
| 3725 } \ | |
| 3726 SFTB_current = SFTB_current->prev; \ | |
| 3727 SFTB_limit = countof (current_##typename##_block->block); \ | |
| 3728 } \ | |
| 3729 \ | |
| 3730 gc_count_num_##typename##_in_use = num_used; \ | |
| 3731 gc_count_num_##typename##_freelist = num_free; \ | |
| 3732 } while (0) | |
| 3733 | |
| 3734 #else /* !ERROR_CHECK_GC */ | |
| 3735 | |
| 771 | 3736 #define SWEEP_FIXED_TYPE_BLOCK_1(typename, obj_type, lheader) \ |
| 3737 do { \ | |
| 3738 struct typename##_block *SFTB_current; \ | |
| 3739 struct typename##_block **SFTB_prev; \ | |
| 3740 int SFTB_limit; \ | |
| 3741 int num_free = 0, num_used = 0; \ | |
| 3742 \ | |
| 3743 typename##_free_list = 0; \ | |
| 3744 \ | |
| 3745 for (SFTB_prev = ¤t_##typename##_block, \ | |
| 3746 SFTB_current = current_##typename##_block, \ | |
| 3747 SFTB_limit = current_##typename##_block_index; \ | |
| 3748 SFTB_current; \ | |
| 3749 ) \ | |
| 3750 { \ | |
| 3751 int SFTB_iii; \ | |
| 3752 int SFTB_empty = 1; \ | |
| 3753 Lisp_Free *SFTB_old_free_list = typename##_free_list; \ | |
| 3754 \ | |
| 3755 for (SFTB_iii = 0; SFTB_iii < SFTB_limit; SFTB_iii++) \ | |
| 3756 { \ | |
| 3757 obj_type *SFTB_victim = &(SFTB_current->block[SFTB_iii]); \ | |
| 3758 \ | |
| 3759 if (LRECORD_FREE_P (SFTB_victim)) \ | |
| 3760 { \ | |
| 3761 num_free++; \ | |
| 3762 PUT_FIXED_TYPE_ON_FREE_LIST (typename, obj_type, SFTB_victim); \ | |
| 3763 } \ | |
| 3764 else if (C_READONLY_RECORD_HEADER_P (&SFTB_victim->lheader)) \ | |
| 3765 { \ | |
| 3766 SFTB_empty = 0; \ | |
| 3767 num_used++; \ | |
| 3768 } \ | |
| 3769 else if (! MARKED_RECORD_HEADER_P (&SFTB_victim->lheader)) \ | |
| 3770 { \ | |
| 3771 num_free++; \ | |
| 3772 FREE_FIXED_TYPE (typename, obj_type, SFTB_victim); \ | |
| 3773 } \ | |
| 3774 else \ | |
| 3775 { \ | |
| 3776 SFTB_empty = 0; \ | |
| 3777 num_used++; \ | |
| 3778 UNMARK_##typename (SFTB_victim); \ | |
| 3779 } \ | |
| 3780 } \ | |
| 3781 if (!SFTB_empty) \ | |
| 3782 { \ | |
| 3783 SFTB_prev = &(SFTB_current->prev); \ | |
| 3784 SFTB_current = SFTB_current->prev; \ | |
| 3785 } \ | |
| 3786 else if (SFTB_current == current_##typename##_block \ | |
| 3787 && !SFTB_current->prev) \ | |
| 3788 { \ | |
| 3789 /* No real point in freeing sole allocation block */ \ | |
| 3790 break; \ | |
| 3791 } \ | |
| 3792 else \ | |
| 3793 { \ | |
| 3794 struct typename##_block *SFTB_victim_block = SFTB_current; \ | |
| 3795 if (SFTB_victim_block == current_##typename##_block) \ | |
| 3796 current_##typename##_block_index \ | |
| 3797 = countof (current_##typename##_block->block); \ | |
| 3798 SFTB_current = SFTB_current->prev; \ | |
| 3799 { \ | |
| 3800 *SFTB_prev = SFTB_current; \ | |
| 1726 | 3801 xfree (SFTB_victim_block, struct typename##_block *); \ |
| 771 | 3802 /* Restore free list to what it was before victim was swept */ \ |
| 3803 typename##_free_list = SFTB_old_free_list; \ | |
| 3804 num_free -= SFTB_limit; \ | |
| 3805 } \ | |
| 3806 } \ | |
| 3807 SFTB_limit = countof (current_##typename##_block->block); \ | |
| 3808 } \ | |
| 3809 \ | |
| 3810 gc_count_num_##typename##_in_use = num_used; \ | |
| 3811 gc_count_num_##typename##_freelist = num_free; \ | |
| 428 | 3812 } while (0) |
| 3813 | |
| 3814 #endif /* !ERROR_CHECK_GC */ | |
| 3815 | |
| 771 | 3816 #define SWEEP_FIXED_TYPE_BLOCK(typename, obj_type) \ |
| 3817 SWEEP_FIXED_TYPE_BLOCK_1 (typename, obj_type, lheader) | |
| 3818 | |
| 428 | 3819 |
| 3820 | |
| 3821 | |
| 3822 static void | |
| 3823 sweep_conses (void) | |
| 3824 { | |
| 3825 #define UNMARK_cons(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 3826 #define ADDITIONAL_FREE_cons(ptr) | |
| 3827 | |
| 440 | 3828 SWEEP_FIXED_TYPE_BLOCK (cons, Lisp_Cons); |
| 428 | 3829 } |
| 3830 | |
| 3831 /* Explicitly free a cons cell. */ | |
| 3832 void | |
| 853 | 3833 free_cons (Lisp_Object cons) |
| 428 | 3834 { |
| 853 | 3835 Lisp_Cons *ptr = XCONS (cons); |
| 3836 | |
| 428 | 3837 #ifdef ERROR_CHECK_GC |
| 3838 /* If the CAR is not an int, then it will be a pointer, which will | |
| 3839 always be four-byte aligned. If this cons cell has already been | |
| 3840 placed on the free list, however, its car will probably contain | |
| 3841 a chain pointer to the next cons on the list, which has cleverly | |
| 3842 had all its 0's and 1's inverted. This allows for a quick | |
| 1204 | 3843 check to make sure we're not freeing something already freed. |
| 3844 | |
| 3845 NOTE: This check may not be necessary. Freeing an object sets its | |
| 3846 type to lrecord_type_free, which will trip up the XCONS() above -- as | |
| 3847 well as a check in FREE_FIXED_TYPE(). */ | |
| 853 | 3848 if (POINTER_TYPE_P (XTYPE (cons_car (ptr)))) |
| 3849 ASSERT_VALID_POINTER (XPNTR (cons_car (ptr))); | |
| 428 | 3850 #endif /* ERROR_CHECK_GC */ |
| 3851 | |
| 440 | 3852 FREE_FIXED_TYPE_WHEN_NOT_IN_GC (cons, Lisp_Cons, ptr); |
| 428 | 3853 } |
| 3854 | |
| 3855 /* explicitly free a list. You **must make sure** that you have | |
| 3856 created all the cons cells that make up this list and that there | |
| 3857 are no pointers to any of these cons cells anywhere else. If there | |
| 3858 are, you will lose. */ | |
| 3859 | |
| 3860 void | |
| 3861 free_list (Lisp_Object list) | |
| 3862 { | |
| 3863 Lisp_Object rest, next; | |
| 3864 | |
| 3865 for (rest = list; !NILP (rest); rest = next) | |
| 3866 { | |
| 3867 next = XCDR (rest); | |
| 853 | 3868 free_cons (rest); |
| 428 | 3869 } |
| 3870 } | |
| 3871 | |
| 3872 /* explicitly free an alist. You **must make sure** that you have | |
| 3873 created all the cons cells that make up this alist and that there | |
| 3874 are no pointers to any of these cons cells anywhere else. If there | |
| 3875 are, you will lose. */ | |
| 3876 | |
| 3877 void | |
| 3878 free_alist (Lisp_Object alist) | |
| 3879 { | |
| 3880 Lisp_Object rest, next; | |
| 3881 | |
| 3882 for (rest = alist; !NILP (rest); rest = next) | |
| 3883 { | |
| 3884 next = XCDR (rest); | |
| 853 | 3885 free_cons (XCAR (rest)); |
| 3886 free_cons (rest); | |
| 428 | 3887 } |
| 3888 } | |
| 3889 | |
| 3890 static void | |
| 3891 sweep_compiled_functions (void) | |
| 3892 { | |
| 3893 #define UNMARK_compiled_function(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 945 | 3894 #define ADDITIONAL_FREE_compiled_function(ptr) \ |
| 1726 | 3895 if (ptr->args_in_array) xfree (ptr->args, Lisp_Object *) |
| 428 | 3896 |
| 3897 SWEEP_FIXED_TYPE_BLOCK (compiled_function, Lisp_Compiled_Function); | |
| 3898 } | |
| 3899 | |
| 3900 static void | |
| 3901 sweep_floats (void) | |
| 3902 { | |
| 3903 #define UNMARK_float(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 3904 #define ADDITIONAL_FREE_float(ptr) | |
| 3905 | |
| 440 | 3906 SWEEP_FIXED_TYPE_BLOCK (float, Lisp_Float); |
| 428 | 3907 } |
| 3908 | |
| 1983 | 3909 #ifdef HAVE_BIGNUM |
| 3910 static void | |
| 3911 sweep_bignums (void) | |
| 3912 { | |
| 3913 #define UNMARK_bignum(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 3914 #define ADDITIONAL_FREE_bignum(ptr) bignum_fini (ptr->data) | |
| 3915 | |
| 3916 SWEEP_FIXED_TYPE_BLOCK (bignum, Lisp_Bignum); | |
| 3917 } | |
| 3918 #endif /* HAVE_BIGNUM */ | |
| 3919 | |
| 3920 #ifdef HAVE_RATIO | |
| 3921 static void | |
| 3922 sweep_ratios (void) | |
| 3923 { | |
| 3924 #define UNMARK_ratio(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 3925 #define ADDITIONAL_FREE_ratio(ptr) ratio_fini (ptr->data) | |
| 3926 | |
| 3927 SWEEP_FIXED_TYPE_BLOCK (ratio, Lisp_Ratio); | |
| 3928 } | |
| 3929 #endif /* HAVE_RATIO */ | |
| 3930 | |
| 3931 #ifdef HAVE_BIGFLOAT | |
| 3932 static void | |
| 3933 sweep_bigfloats (void) | |
| 3934 { | |
| 3935 #define UNMARK_bigfloat(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 3936 #define ADDITIONAL_FREE_bigfloat(ptr) bigfloat_fini (ptr->bf) | |
| 3937 | |
| 3938 SWEEP_FIXED_TYPE_BLOCK (bigfloat, Lisp_Bigfloat); | |
| 3939 } | |
| 3940 #endif | |
| 3941 | |
| 428 | 3942 static void |
| 3943 sweep_symbols (void) | |
| 3944 { | |
| 3945 #define UNMARK_symbol(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 3946 #define ADDITIONAL_FREE_symbol(ptr) | |
| 3947 | |
| 440 | 3948 SWEEP_FIXED_TYPE_BLOCK (symbol, Lisp_Symbol); |
| 428 | 3949 } |
| 3950 | |
| 3951 static void | |
| 3952 sweep_extents (void) | |
| 3953 { | |
| 3954 #define UNMARK_extent(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 3955 #define ADDITIONAL_FREE_extent(ptr) | |
| 3956 | |
| 3957 SWEEP_FIXED_TYPE_BLOCK (extent, struct extent); | |
| 3958 } | |
| 3959 | |
| 3960 static void | |
| 3961 sweep_events (void) | |
| 3962 { | |
| 3963 #define UNMARK_event(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 3964 #define ADDITIONAL_FREE_event(ptr) | |
| 3965 | |
| 440 | 3966 SWEEP_FIXED_TYPE_BLOCK (event, Lisp_Event); |
| 428 | 3967 } |
| 3968 | |
| 1204 | 3969 #ifdef EVENT_DATA_AS_OBJECTS |
| 934 | 3970 |
| 3971 static void | |
| 3972 sweep_key_data (void) | |
| 3973 { | |
| 3974 #define UNMARK_key_data(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 3975 #define ADDITIONAL_FREE_key_data(ptr) | |
| 3976 | |
| 3977 SWEEP_FIXED_TYPE_BLOCK (key_data, Lisp_Key_Data); | |
| 3978 } | |
| 3979 | |
| 1204 | 3980 void |
| 3981 free_key_data (Lisp_Object ptr) | |
| 3982 { | |
| 3983 FREE_FIXED_TYPE_WHEN_NOT_IN_GC (key_data, Lisp_Key_Data, XKEY_DATA (ptr)); | |
| 3984 } | |
| 3985 | |
| 934 | 3986 static void |
| 3987 sweep_button_data (void) | |
| 3988 { | |
| 3989 #define UNMARK_button_data(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 3990 #define ADDITIONAL_FREE_button_data(ptr) | |
| 3991 | |
| 3992 SWEEP_FIXED_TYPE_BLOCK (button_data, Lisp_Button_Data); | |
| 3993 } | |
| 3994 | |
| 1204 | 3995 void |
| 3996 free_button_data (Lisp_Object ptr) | |
| 3997 { | |
| 3998 FREE_FIXED_TYPE_WHEN_NOT_IN_GC (button_data, Lisp_Button_Data, XBUTTON_DATA (ptr)); | |
| 3999 } | |
| 4000 | |
| 934 | 4001 static void |
| 4002 sweep_motion_data (void) | |
| 4003 { | |
| 4004 #define UNMARK_motion_data(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 4005 #define ADDITIONAL_FREE_motion_data(ptr) | |
| 4006 | |
| 4007 SWEEP_FIXED_TYPE_BLOCK (motion_data, Lisp_Motion_Data); | |
| 4008 } | |
| 4009 | |
| 1204 | 4010 void |
| 4011 free_motion_data (Lisp_Object ptr) | |
| 4012 { | |
| 4013 FREE_FIXED_TYPE_WHEN_NOT_IN_GC (motion_data, Lisp_Motion_Data, XMOTION_DATA (ptr)); | |
| 4014 } | |
| 4015 | |
| 934 | 4016 static void |
| 4017 sweep_process_data (void) | |
| 4018 { | |
| 4019 #define UNMARK_process_data(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 4020 #define ADDITIONAL_FREE_process_data(ptr) | |
| 4021 | |
| 4022 SWEEP_FIXED_TYPE_BLOCK (process_data, Lisp_Process_Data); | |
| 4023 } | |
| 4024 | |
| 1204 | 4025 void |
| 4026 free_process_data (Lisp_Object ptr) | |
| 4027 { | |
| 4028 FREE_FIXED_TYPE_WHEN_NOT_IN_GC (process_data, Lisp_Process_Data, XPROCESS_DATA (ptr)); | |
| 4029 } | |
| 4030 | |
| 934 | 4031 static void |
| 4032 sweep_timeout_data (void) | |
| 4033 { | |
| 4034 #define UNMARK_timeout_data(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 4035 #define ADDITIONAL_FREE_timeout_data(ptr) | |
| 4036 | |
| 4037 SWEEP_FIXED_TYPE_BLOCK (timeout_data, Lisp_Timeout_Data); | |
| 4038 } | |
| 4039 | |
| 1204 | 4040 void |
| 4041 free_timeout_data (Lisp_Object ptr) | |
| 4042 { | |
| 4043 FREE_FIXED_TYPE_WHEN_NOT_IN_GC (timeout_data, Lisp_Timeout_Data, XTIMEOUT_DATA (ptr)); | |
| 4044 } | |
| 4045 | |
| 934 | 4046 static void |
| 4047 sweep_magic_data (void) | |
| 4048 { | |
| 4049 #define UNMARK_magic_data(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 4050 #define ADDITIONAL_FREE_magic_data(ptr) | |
| 4051 | |
| 4052 SWEEP_FIXED_TYPE_BLOCK (magic_data, Lisp_Magic_Data); | |
| 4053 } | |
| 4054 | |
| 1204 | 4055 void |
| 4056 free_magic_data (Lisp_Object ptr) | |
| 4057 { | |
| 4058 FREE_FIXED_TYPE_WHEN_NOT_IN_GC (magic_data, Lisp_Magic_Data, XMAGIC_DATA (ptr)); | |
| 4059 } | |
| 4060 | |
| 934 | 4061 static void |
| 4062 sweep_magic_eval_data (void) | |
| 4063 { | |
| 4064 #define UNMARK_magic_eval_data(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 4065 #define ADDITIONAL_FREE_magic_eval_data(ptr) | |
| 4066 | |
| 4067 SWEEP_FIXED_TYPE_BLOCK (magic_eval_data, Lisp_Magic_Eval_Data); | |
| 4068 } | |
| 4069 | |
| 1204 | 4070 void |
| 4071 free_magic_eval_data (Lisp_Object ptr) | |
| 4072 { | |
| 4073 FREE_FIXED_TYPE_WHEN_NOT_IN_GC (magic_eval_data, Lisp_Magic_Eval_Data, XMAGIC_EVAL_DATA (ptr)); | |
| 4074 } | |
| 4075 | |
| 934 | 4076 static void |
| 4077 sweep_eval_data (void) | |
| 4078 { | |
| 4079 #define UNMARK_eval_data(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 4080 #define ADDITIONAL_FREE_eval_data(ptr) | |
| 4081 | |
| 4082 SWEEP_FIXED_TYPE_BLOCK (eval_data, Lisp_Eval_Data); | |
| 4083 } | |
| 4084 | |
| 1204 | 4085 void |
| 4086 free_eval_data (Lisp_Object ptr) | |
| 4087 { | |
| 4088 FREE_FIXED_TYPE_WHEN_NOT_IN_GC (eval_data, Lisp_Eval_Data, XEVAL_DATA (ptr)); | |
| 4089 } | |
| 4090 | |
| 934 | 4091 static void |
| 4092 sweep_misc_user_data (void) | |
| 4093 { | |
| 4094 #define UNMARK_misc_user_data(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 4095 #define ADDITIONAL_FREE_misc_user_data(ptr) | |
| 4096 | |
| 4097 SWEEP_FIXED_TYPE_BLOCK (misc_user_data, Lisp_Misc_User_Data); | |
| 4098 } | |
| 4099 | |
| 1204 | 4100 void |
| 4101 free_misc_user_data (Lisp_Object ptr) | |
| 4102 { | |
| 4103 FREE_FIXED_TYPE_WHEN_NOT_IN_GC (misc_user_data, Lisp_Misc_User_Data, XMISC_USER_DATA (ptr)); | |
| 4104 } | |
| 4105 | |
| 4106 #endif /* EVENT_DATA_AS_OBJECTS */ | |
| 934 | 4107 |
| 428 | 4108 static void |
| 4109 sweep_markers (void) | |
| 4110 { | |
| 4111 #define UNMARK_marker(ptr) UNMARK_RECORD_HEADER (&((ptr)->lheader)) | |
| 4112 #define ADDITIONAL_FREE_marker(ptr) \ | |
| 4113 do { Lisp_Object tem; \ | |
| 793 | 4114 tem = wrap_marker (ptr); \ |
| 428 | 4115 unchain_marker (tem); \ |
| 4116 } while (0) | |
| 4117 | |
| 440 | 4118 SWEEP_FIXED_TYPE_BLOCK (marker, Lisp_Marker); |
| 428 | 4119 } |
| 4120 | |
| 4121 /* Explicitly free a marker. */ | |
| 4122 void | |
| 1204 | 4123 free_marker (Lisp_Object ptr) |
| 428 | 4124 { |
| 1204 | 4125 FREE_FIXED_TYPE_WHEN_NOT_IN_GC (marker, Lisp_Marker, XMARKER (ptr)); |
| 428 | 4126 } |
| 4127 | |
| 4128 | |
| 4129 #if defined (MULE) && defined (VERIFY_STRING_CHARS_INTEGRITY) | |
| 4130 | |
| 4131 static void | |
| 4132 verify_string_chars_integrity (void) | |
| 4133 { | |
| 4134 struct string_chars_block *sb; | |
| 4135 | |
| 4136 /* Scan each existing string block sequentially, string by string. */ | |
| 4137 for (sb = first_string_chars_block; sb; sb = sb->next) | |
| 4138 { | |
| 4139 int pos = 0; | |
| 4140 /* POS is the index of the next string in the block. */ | |
| 4141 while (pos < sb->pos) | |
| 4142 { | |
| 4143 struct string_chars *s_chars = | |
| 4144 (struct string_chars *) &(sb->string_chars[pos]); | |
| 438 | 4145 Lisp_String *string; |
| 428 | 4146 int size; |
| 4147 int fullsize; | |
| 4148 | |
| 454 | 4149 /* If the string_chars struct is marked as free (i.e. the |
| 4150 STRING pointer is NULL) then this is an unused chunk of | |
| 4151 string storage. (See below.) */ | |
| 4152 | |
| 4153 if (STRING_CHARS_FREE_P (s_chars)) | |
| 428 | 4154 { |
| 4155 fullsize = ((struct unused_string_chars *) s_chars)->fullsize; | |
| 4156 pos += fullsize; | |
| 4157 continue; | |
| 4158 } | |
| 4159 | |
| 4160 string = s_chars->string; | |
| 4161 /* Must be 32-bit aligned. */ | |
| 4162 assert ((((int) string) & 3) == 0); | |
| 4163 | |
| 793 | 4164 size = string->size_; |
| 428 | 4165 fullsize = STRING_FULLSIZE (size); |
| 4166 | |
| 4167 assert (!BIG_STRING_FULLSIZE_P (fullsize)); | |
| 793 | 4168 assert (string->data_ == s_chars->chars); |
| 428 | 4169 pos += fullsize; |
| 4170 } | |
| 4171 assert (pos == sb->pos); | |
| 4172 } | |
| 4173 } | |
| 4174 | |
| 1204 | 4175 #endif /* defined (MULE) && defined (VERIFY_STRING_CHARS_INTEGRITY) */ |
| 428 | 4176 |
| 4177 /* Compactify string chars, relocating the reference to each -- | |
| 4178 free any empty string_chars_block we see. */ | |
| 4179 static void | |
| 4180 compact_string_chars (void) | |
| 4181 { | |
| 4182 struct string_chars_block *to_sb = first_string_chars_block; | |
| 4183 int to_pos = 0; | |
| 4184 struct string_chars_block *from_sb; | |
| 4185 | |
| 4186 /* Scan each existing string block sequentially, string by string. */ | |
| 4187 for (from_sb = first_string_chars_block; from_sb; from_sb = from_sb->next) | |
| 4188 { | |
| 4189 int from_pos = 0; | |
| 4190 /* FROM_POS is the index of the next string in the block. */ | |
| 4191 while (from_pos < from_sb->pos) | |
| 4192 { | |
| 4193 struct string_chars *from_s_chars = | |
| 4194 (struct string_chars *) &(from_sb->string_chars[from_pos]); | |
| 4195 struct string_chars *to_s_chars; | |
| 438 | 4196 Lisp_String *string; |
| 428 | 4197 int size; |
| 4198 int fullsize; | |
| 4199 | |
| 454 | 4200 /* If the string_chars struct is marked as free (i.e. the |
| 4201 STRING pointer is NULL) then this is an unused chunk of | |
| 4202 string storage. This happens under Mule when a string's | |
| 4203 size changes in such a way that its fullsize changes. | |
| 4204 (Strings can change size because a different-length | |
| 4205 character can be substituted for another character.) | |
| 4206 In this case, after the bogus string pointer is the | |
| 4207 "fullsize" of this entry, i.e. how many bytes to skip. */ | |
| 4208 | |
| 4209 if (STRING_CHARS_FREE_P (from_s_chars)) | |
| 428 | 4210 { |
| 4211 fullsize = ((struct unused_string_chars *) from_s_chars)->fullsize; | |
| 4212 from_pos += fullsize; | |
| 4213 continue; | |
| 4214 } | |
| 4215 | |
| 4216 string = from_s_chars->string; | |
| 1204 | 4217 gc_checking_assert (!(LRECORD_FREE_P (string))); |
| 428 | 4218 |
| 793 | 4219 size = string->size_; |
| 428 | 4220 fullsize = STRING_FULLSIZE (size); |
| 4221 | |
| 442 | 4222 gc_checking_assert (! BIG_STRING_FULLSIZE_P (fullsize)); |
| 428 | 4223 |
| 4224 /* Just skip it if it isn't marked. */ | |
| 771 | 4225 if (! MARKED_RECORD_HEADER_P (&(string->u.lheader))) |
| 428 | 4226 { |
| 4227 from_pos += fullsize; | |
| 4228 continue; | |
| 4229 } | |
| 4230 | |
| 4231 /* If it won't fit in what's left of TO_SB, close TO_SB out | |
| 4232 and go on to the next string_chars_block. We know that TO_SB | |
| 4233 cannot advance past FROM_SB here since FROM_SB is large enough | |
| 4234 to currently contain this string. */ | |
| 4235 if ((to_pos + fullsize) > countof (to_sb->string_chars)) | |
| 4236 { | |
| 4237 to_sb->pos = to_pos; | |
| 4238 to_sb = to_sb->next; | |
| 4239 to_pos = 0; | |
| 4240 } | |
| 4241 | |
| 4242 /* Compute new address of this string | |
| 4243 and update TO_POS for the space being used. */ | |
| 4244 to_s_chars = (struct string_chars *) &(to_sb->string_chars[to_pos]); | |
| 4245 | |
| 4246 /* Copy the string_chars to the new place. */ | |
| 4247 if (from_s_chars != to_s_chars) | |
| 4248 memmove (to_s_chars, from_s_chars, fullsize); | |
| 4249 | |
| 4250 /* Relocate FROM_S_CHARS's reference */ | |
| 826 | 4251 set_lispstringp_data (string, &(to_s_chars->chars[0])); |
| 428 | 4252 |
| 4253 from_pos += fullsize; | |
| 4254 to_pos += fullsize; | |
| 4255 } | |
| 4256 } | |
| 4257 | |
| 4258 /* Set current to the last string chars block still used and | |
| 4259 free any that follow. */ | |
| 4260 { | |
| 4261 struct string_chars_block *victim; | |
| 4262 | |
| 4263 for (victim = to_sb->next; victim; ) | |
| 4264 { | |
| 4265 struct string_chars_block *next = victim->next; | |
| 1726 | 4266 xfree (victim, struct string_chars_block *); |
| 428 | 4267 victim = next; |
| 4268 } | |
| 4269 | |
| 4270 current_string_chars_block = to_sb; | |
| 4271 current_string_chars_block->pos = to_pos; | |
| 4272 current_string_chars_block->next = 0; | |
| 4273 } | |
| 4274 } | |
| 4275 | |
| 4276 #if 1 /* Hack to debug missing purecopy's */ | |
| 4277 static int debug_string_purity; | |
| 4278 | |
| 4279 static void | |
| 793 | 4280 debug_string_purity_print (Lisp_Object p) |
| 428 | 4281 { |
| 4282 Charcount i; | |
| 826 | 4283 Charcount s = string_char_length (p); |
| 442 | 4284 stderr_out ("\""); |
| 428 | 4285 for (i = 0; i < s; i++) |
| 4286 { | |
| 867 | 4287 Ichar ch = string_ichar (p, i); |
| 428 | 4288 if (ch < 32 || ch >= 126) |
| 4289 stderr_out ("\\%03o", ch); | |
| 4290 else if (ch == '\\' || ch == '\"') | |
| 4291 stderr_out ("\\%c", ch); | |
| 4292 else | |
| 4293 stderr_out ("%c", ch); | |
| 4294 } | |
| 4295 stderr_out ("\"\n"); | |
| 4296 } | |
| 4297 #endif /* 1 */ | |
| 4298 | |
| 4299 | |
| 4300 static void | |
| 4301 sweep_strings (void) | |
| 4302 { | |
| 647 | 4303 int num_small_used = 0; |
| 4304 Bytecount num_small_bytes = 0, num_bytes = 0; | |
| 428 | 4305 int debug = debug_string_purity; |
| 4306 | |
| 793 | 4307 #define UNMARK_string(ptr) do { \ |
| 4308 Lisp_String *p = (ptr); \ | |
| 4309 Bytecount size = p->size_; \ | |
| 4310 UNMARK_RECORD_HEADER (&(p->u.lheader)); \ | |
| 4311 num_bytes += size; \ | |
| 4312 if (!BIG_STRING_SIZE_P (size)) \ | |
| 4313 { \ | |
| 4314 num_small_bytes += size; \ | |
| 4315 num_small_used++; \ | |
| 4316 } \ | |
| 4317 if (debug) \ | |
| 4318 debug_string_purity_print (wrap_string (p)); \ | |
| 438 | 4319 } while (0) |
| 4320 #define ADDITIONAL_FREE_string(ptr) do { \ | |
| 793 | 4321 Bytecount size = ptr->size_; \ |
| 438 | 4322 if (BIG_STRING_SIZE_P (size)) \ |
| 1726 | 4323 xfree (ptr->data_, Ibyte *); \ |
| 438 | 4324 } while (0) |
| 4325 | |
| 771 | 4326 SWEEP_FIXED_TYPE_BLOCK_1 (string, Lisp_String, u.lheader); |
| 428 | 4327 |
| 4328 gc_count_num_short_string_in_use = num_small_used; | |
| 4329 gc_count_string_total_size = num_bytes; | |
| 4330 gc_count_short_string_total_size = num_small_bytes; | |
| 4331 } | |
| 4332 | |
| 4333 | |
| 4334 /* I hate duplicating all this crap! */ | |
| 4335 int | |
| 4336 marked_p (Lisp_Object obj) | |
| 4337 { | |
| 4338 /* Checks we used to perform. */ | |
| 4339 /* if (EQ (obj, Qnull_pointer)) return 1; */ | |
| 4340 /* if (!POINTER_TYPE_P (XGCTYPE (obj))) return 1; */ | |
| 4341 /* if (PURIFIED (XPNTR (obj))) return 1; */ | |
| 4342 | |
| 4343 if (XTYPE (obj) == Lisp_Type_Record) | |
| 4344 { | |
| 4345 struct lrecord_header *lheader = XRECORD_LHEADER (obj); | |
| 442 | 4346 |
| 4347 GC_CHECK_LHEADER_INVARIANTS (lheader); | |
| 4348 | |
| 4349 return MARKED_RECORD_HEADER_P (lheader); | |
| 428 | 4350 } |
| 4351 return 1; | |
| 4352 } | |
| 4353 | |
| 4354 static void | |
| 4355 gc_sweep (void) | |
| 4356 { | |
| 4357 /* Free all unmarked records. Do this at the very beginning, | |
| 4358 before anything else, so that the finalize methods can safely | |
| 4359 examine items in the objects. sweep_lcrecords_1() makes | |
| 4360 sure to call all the finalize methods *before* freeing anything, | |
| 4361 to complete the safety. */ | |
| 4362 { | |
| 4363 int ignored; | |
| 4364 sweep_lcrecords_1 (&all_lcrecords, &ignored); | |
| 4365 } | |
| 4366 | |
| 4367 compact_string_chars (); | |
| 4368 | |
| 4369 /* Finalize methods below (called through the ADDITIONAL_FREE_foo | |
| 4370 macros) must be *extremely* careful to make sure they're not | |
| 4371 referencing freed objects. The only two existing finalize | |
| 4372 methods (for strings and markers) pass muster -- the string | |
| 4373 finalizer doesn't look at anything but its own specially- | |
| 4374 created block, and the marker finalizer only looks at live | |
| 4375 buffers (which will never be freed) and at the markers before | |
| 4376 and after it in the chain (which, by induction, will never be | |
| 4377 freed because if so, they would have already removed themselves | |
| 4378 from the chain). */ | |
| 4379 | |
| 4380 /* Put all unmarked strings on free list, free'ing the string chars | |
| 4381 of large unmarked strings */ | |
| 4382 sweep_strings (); | |
| 4383 | |
| 4384 /* Put all unmarked conses on free list */ | |
| 4385 sweep_conses (); | |
| 4386 | |
| 4387 /* Free all unmarked compiled-function objects */ | |
| 4388 sweep_compiled_functions (); | |
| 4389 | |
| 4390 /* Put all unmarked floats on free list */ | |
| 4391 sweep_floats (); | |
| 4392 | |
| 1983 | 4393 #ifdef HAVE_BIGNUM |
| 4394 /* Put all unmarked bignums on free list */ | |
| 4395 sweep_bignums (); | |
| 4396 #endif | |
| 4397 | |
| 4398 #ifdef HAVE_RATIO | |
| 4399 /* Put all unmarked ratios on free list */ | |
| 4400 sweep_ratios (); | |
| 4401 #endif | |
| 4402 | |
| 4403 #ifdef HAVE_BIGFLOAT | |
| 4404 /* Put all unmarked bigfloats on free list */ | |
| 4405 sweep_bigfloats (); | |
| 4406 #endif | |
| 4407 | |
| 428 | 4408 /* Put all unmarked symbols on free list */ |
| 4409 sweep_symbols (); | |
| 4410 | |
| 4411 /* Put all unmarked extents on free list */ | |
| 4412 sweep_extents (); | |
| 4413 | |
| 4414 /* Put all unmarked markers on free list. | |
| 4415 Dechain each one first from the buffer into which it points. */ | |
| 4416 sweep_markers (); | |
| 4417 | |
| 4418 sweep_events (); | |
| 4419 | |
| 1204 | 4420 #ifdef EVENT_DATA_AS_OBJECTS |
| 934 | 4421 sweep_key_data (); |
| 4422 sweep_button_data (); | |
| 4423 sweep_motion_data (); | |
| 4424 sweep_process_data (); | |
| 4425 sweep_timeout_data (); | |
| 4426 sweep_magic_data (); | |
| 4427 sweep_magic_eval_data (); | |
| 4428 sweep_eval_data (); | |
| 4429 sweep_misc_user_data (); | |
| 1204 | 4430 #endif /* EVENT_DATA_AS_OBJECTS */ |
| 934 | 4431 |
| 428 | 4432 #ifdef PDUMP |
| 442 | 4433 pdump_objects_unmark (); |
| 428 | 4434 #endif |
| 4435 } | |
| 4436 | |
| 4437 /* Clearing for disksave. */ | |
| 4438 | |
| 4439 void | |
| 4440 disksave_object_finalization (void) | |
| 4441 { | |
| 4442 /* It's important that certain information from the environment not get | |
| 4443 dumped with the executable (pathnames, environment variables, etc.). | |
| 4444 To make it easier to tell when this has happened with strings(1) we | |
| 4445 clear some known-to-be-garbage blocks of memory, so that leftover | |
| 4446 results of old evaluation don't look like potential problems. | |
| 4447 But first we set some notable variables to nil and do one more GC, | |
| 4448 to turn those strings into garbage. | |
| 440 | 4449 */ |
| 428 | 4450 |
| 4451 /* Yeah, this list is pretty ad-hoc... */ | |
| 4452 Vprocess_environment = Qnil; | |
| 771 | 4453 env_initted = 0; |
| 428 | 4454 Vexec_directory = Qnil; |
| 4455 Vdata_directory = Qnil; | |
| 4456 Vsite_directory = Qnil; | |
| 4457 Vdoc_directory = Qnil; | |
| 4458 Vexec_path = Qnil; | |
| 4459 Vload_path = Qnil; | |
| 4460 /* Vdump_load_path = Qnil; */ | |
| 4461 /* Release hash tables for locate_file */ | |
| 4462 Flocate_file_clear_hashing (Qt); | |
| 771 | 4463 uncache_home_directory (); |
| 776 | 4464 zero_out_command_line_status_vars (); |
| 872 | 4465 clear_default_devices (); |
| 428 | 4466 |
| 4467 #if defined(LOADHIST) && !(defined(LOADHIST_DUMPED) || \ | |
| 4468 defined(LOADHIST_BUILTIN)) | |
| 4469 Vload_history = Qnil; | |
| 4470 #endif | |
| 4471 Vshell_file_name = Qnil; | |
| 4472 | |
| 4473 garbage_collect_1 (); | |
| 4474 | |
| 4475 /* Run the disksave finalization methods of all live objects. */ | |
| 4476 disksave_object_finalization_1 (); | |
| 4477 | |
| 4478 /* Zero out the uninitialized (really, unused) part of the containers | |
| 4479 for the live strings. */ | |
| 4480 { | |
| 4481 struct string_chars_block *scb; | |
| 4482 for (scb = first_string_chars_block; scb; scb = scb->next) | |
| 4483 { | |
| 4484 int count = sizeof (scb->string_chars) - scb->pos; | |
| 4485 | |
| 4486 assert (count >= 0 && count < STRING_CHARS_BLOCK_SIZE); | |
| 440 | 4487 if (count != 0) |
| 4488 { | |
| 4489 /* from the block's fill ptr to the end */ | |
| 4490 memset ((scb->string_chars + scb->pos), 0, count); | |
| 4491 } | |
| 428 | 4492 } |
| 4493 } | |
| 4494 | |
| 4495 /* There, that ought to be enough... */ | |
| 4496 | |
| 4497 } | |
| 4498 | |
| 4499 | |
| 771 | 4500 int |
| 4501 begin_gc_forbidden (void) | |
| 4502 { | |
| 853 | 4503 return internal_bind_int (&gc_currently_forbidden, 1); |
| 771 | 4504 } |
| 4505 | |
| 4506 void | |
| 4507 end_gc_forbidden (int count) | |
| 4508 { | |
| 4509 unbind_to (count); | |
| 4510 } | |
| 4511 | |
| 428 | 4512 /* Maybe we want to use this when doing a "panic" gc after memory_full()? */ |
| 4513 static int gc_hooks_inhibited; | |
| 4514 | |
| 611 | 4515 struct post_gc_action |
| 4516 { | |
| 4517 void (*fun) (void *); | |
| 4518 void *arg; | |
| 4519 }; | |
| 4520 | |
| 4521 typedef struct post_gc_action post_gc_action; | |
| 4522 | |
| 4523 typedef struct | |
| 4524 { | |
| 4525 Dynarr_declare (post_gc_action); | |
| 4526 } post_gc_action_dynarr; | |
| 4527 | |
| 4528 static post_gc_action_dynarr *post_gc_actions; | |
| 4529 | |
| 4530 /* Register an action to be called at the end of GC. | |
| 4531 gc_in_progress is 0 when this is called. | |
| 4532 This is used when it is discovered that an action needs to be taken, | |
| 4533 but it's during GC, so it's not safe. (e.g. in a finalize method.) | |
| 4534 | |
| 4535 As a general rule, do not use Lisp objects here. | |
| 4536 And NEVER signal an error. | |
| 4537 */ | |
| 4538 | |
| 4539 void | |
| 4540 register_post_gc_action (void (*fun) (void *), void *arg) | |
| 4541 { | |
| 4542 post_gc_action action; | |
| 4543 | |
| 4544 if (!post_gc_actions) | |
| 4545 post_gc_actions = Dynarr_new (post_gc_action); | |
| 4546 | |
| 4547 action.fun = fun; | |
| 4548 action.arg = arg; | |
| 4549 | |
| 4550 Dynarr_add (post_gc_actions, action); | |
| 4551 } | |
| 4552 | |
| 4553 static void | |
| 4554 run_post_gc_actions (void) | |
| 4555 { | |
| 4556 int i; | |
| 4557 | |
| 4558 if (post_gc_actions) | |
| 4559 { | |
| 4560 for (i = 0; i < Dynarr_length (post_gc_actions); i++) | |
| 4561 { | |
| 4562 post_gc_action action = Dynarr_at (post_gc_actions, i); | |
| 4563 (action.fun) (action.arg); | |
| 4564 } | |
| 4565 | |
| 4566 Dynarr_reset (post_gc_actions); | |
| 4567 } | |
| 4568 } | |
| 4569 | |
| 428 | 4570 |
| 4571 void | |
| 4572 garbage_collect_1 (void) | |
| 4573 { | |
| 4574 #if MAX_SAVE_STACK > 0 | |
| 4575 char stack_top_variable; | |
| 4576 extern char *stack_bottom; | |
| 4577 #endif | |
| 4578 struct frame *f; | |
| 4579 int speccount; | |
| 4580 int cursor_changed; | |
| 4581 Lisp_Object pre_gc_cursor; | |
| 4582 struct gcpro gcpro1; | |
| 1292 | 4583 PROFILE_DECLARE (); |
| 428 | 4584 |
| 1123 | 4585 assert (!in_display || gc_currently_forbidden); |
| 4586 | |
| 428 | 4587 if (gc_in_progress |
| 4588 || gc_currently_forbidden | |
| 4589 || in_display | |
| 4590 || preparing_for_armageddon) | |
| 4591 return; | |
| 4592 | |
| 1292 | 4593 PROFILE_RECORD_ENTERING_SECTION (QSin_garbage_collection); |
| 4594 | |
| 428 | 4595 /* We used to call selected_frame() here. |
| 4596 | |
| 4597 The following functions cannot be called inside GC | |
| 4598 so we move to after the above tests. */ | |
| 4599 { | |
| 4600 Lisp_Object frame; | |
| 4601 Lisp_Object device = Fselected_device (Qnil); | |
| 4602 if (NILP (device)) /* Could happen during startup, eg. if always_gc */ | |
| 4603 return; | |
| 872 | 4604 frame = Fselected_frame (device); |
| 428 | 4605 if (NILP (frame)) |
| 563 | 4606 invalid_state ("No frames exist on device", device); |
| 428 | 4607 f = XFRAME (frame); |
| 4608 } | |
| 4609 | |
| 4610 pre_gc_cursor = Qnil; | |
| 4611 cursor_changed = 0; | |
| 4612 | |
| 4613 GCPRO1 (pre_gc_cursor); | |
| 4614 | |
| 4615 /* Very important to prevent GC during any of the following | |
| 4616 stuff that might run Lisp code; otherwise, we'll likely | |
| 4617 have infinite GC recursion. */ | |
| 771 | 4618 speccount = begin_gc_forbidden (); |
| 428 | 4619 |
| 887 | 4620 need_to_signal_post_gc = 0; |
| 1318 | 4621 recompute_funcall_allocation_flag (); |
| 887 | 4622 |
| 428 | 4623 if (!gc_hooks_inhibited) |
| 853 | 4624 run_hook_trapping_problems |
| 1333 | 4625 (Qgarbage_collecting, Qpre_gc_hook, |
| 853 | 4626 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION); |
| 428 | 4627 |
| 4628 /* Now show the GC cursor/message. */ | |
| 4629 if (!noninteractive) | |
| 4630 { | |
| 4631 if (FRAME_WIN_P (f)) | |
| 4632 { | |
| 771 | 4633 Lisp_Object frame = wrap_frame (f); |
| 428 | 4634 Lisp_Object cursor = glyph_image_instance (Vgc_pointer_glyph, |
| 4635 FRAME_SELECTED_WINDOW (f), | |
| 4636 ERROR_ME_NOT, 1); | |
| 4637 pre_gc_cursor = f->pointer; | |
| 4638 if (POINTER_IMAGE_INSTANCEP (cursor) | |
| 4639 /* don't change if we don't know how to change back. */ | |
| 4640 && POINTER_IMAGE_INSTANCEP (pre_gc_cursor)) | |
| 4641 { | |
| 4642 cursor_changed = 1; | |
| 4643 Fset_frame_pointer (frame, cursor); | |
| 4644 } | |
| 4645 } | |
| 4646 | |
| 4647 /* Don't print messages to the stream device. */ | |
| 4648 if (!cursor_changed && !FRAME_STREAM_P (f)) | |
| 4649 { | |
| 1154 | 4650 if (garbage_collection_messages) |
| 4651 { | |
| 4652 Lisp_Object args[2], whole_msg; | |
| 4653 args[0] = (STRINGP (Vgc_message) ? Vgc_message : | |
| 4654 build_msg_string (gc_default_message)); | |
| 4655 args[1] = build_string ("..."); | |
| 4656 whole_msg = Fconcat (2, args); | |
| 4657 echo_area_message (f, (Ibyte *) 0, whole_msg, 0, -1, | |
| 4658 Qgarbage_collecting); | |
| 4659 } | |
| 428 | 4660 } |
| 4661 } | |
| 4662 | |
| 4663 /***** Now we actually start the garbage collection. */ | |
| 4664 | |
| 4665 gc_in_progress = 1; | |
| 771 | 4666 inhibit_non_essential_printing_operations = 1; |
| 428 | 4667 |
| 4668 gc_generation_number[0]++; | |
| 4669 | |
| 4670 #if MAX_SAVE_STACK > 0 | |
| 4671 | |
| 4672 /* Save a copy of the contents of the stack, for debugging. */ | |
| 4673 if (!purify_flag) | |
| 4674 { | |
| 4675 /* Static buffer in which we save a copy of the C stack at each GC. */ | |
| 4676 static char *stack_copy; | |
| 665 | 4677 static Bytecount stack_copy_size; |
| 428 | 4678 |
| 4679 ptrdiff_t stack_diff = &stack_top_variable - stack_bottom; | |
| 665 | 4680 Bytecount stack_size = (stack_diff > 0 ? stack_diff : -stack_diff); |
| 428 | 4681 if (stack_size < MAX_SAVE_STACK) |
| 4682 { | |
| 4683 if (stack_copy_size < stack_size) | |
| 4684 { | |
| 4685 stack_copy = (char *) xrealloc (stack_copy, stack_size); | |
| 4686 stack_copy_size = stack_size; | |
| 4687 } | |
| 4688 | |
| 4689 memcpy (stack_copy, | |
| 4690 stack_diff > 0 ? stack_bottom : &stack_top_variable, | |
| 4691 stack_size); | |
| 4692 } | |
| 4693 } | |
| 4694 #endif /* MAX_SAVE_STACK > 0 */ | |
| 4695 | |
| 4696 /* Do some totally ad-hoc resource clearing. */ | |
| 4697 /* #### generalize this? */ | |
| 4698 clear_event_resource (); | |
| 4699 cleanup_specifiers (); | |
| 1204 | 4700 cleanup_buffer_undo_lists (); |
| 428 | 4701 |
| 4702 /* Mark all the special slots that serve as the roots of accessibility. */ | |
| 4703 | |
| 1598 | 4704 #ifdef USE_KKCC |
| 4705 /* initialize kkcc stack */ | |
| 4706 kkcc_gc_stack_init(); | |
| 1676 | 4707 #define mark_object kkcc_gc_stack_push_lisp_object |
| 1598 | 4708 #endif /* USE_KKCC */ |
| 4709 | |
| 428 | 4710 { /* staticpro() */ |
| 452 | 4711 Lisp_Object **p = Dynarr_begin (staticpros); |
| 665 | 4712 Elemcount count; |
| 452 | 4713 for (count = Dynarr_length (staticpros); count; count--) |
| 4714 mark_object (**p++); | |
| 4715 } | |
| 4716 | |
| 4717 { /* staticpro_nodump() */ | |
| 4718 Lisp_Object **p = Dynarr_begin (staticpros_nodump); | |
| 665 | 4719 Elemcount count; |
| 452 | 4720 for (count = Dynarr_length (staticpros_nodump); count; count--) |
| 4721 mark_object (**p++); | |
| 428 | 4722 } |
| 4723 | |
| 4724 { /* GCPRO() */ | |
| 4725 struct gcpro *tail; | |
| 4726 int i; | |
| 4727 for (tail = gcprolist; tail; tail = tail->next) | |
| 4728 for (i = 0; i < tail->nvars; i++) | |
| 4729 mark_object (tail->var[i]); | |
| 4730 } | |
| 4731 | |
| 4732 { /* specbind() */ | |
| 4733 struct specbinding *bind; | |
| 4734 for (bind = specpdl; bind != specpdl_ptr; bind++) | |
| 4735 { | |
| 4736 mark_object (bind->symbol); | |
| 4737 mark_object (bind->old_value); | |
| 4738 } | |
| 4739 } | |
| 4740 | |
| 4741 { | |
| 4742 struct catchtag *catch; | |
| 4743 for (catch = catchlist; catch; catch = catch->next) | |
| 4744 { | |
| 4745 mark_object (catch->tag); | |
| 4746 mark_object (catch->val); | |
| 853 | 4747 mark_object (catch->actual_tag); |
| 428 | 4748 } |
| 4749 } | |
| 4750 | |
| 4751 { | |
| 4752 struct backtrace *backlist; | |
| 4753 for (backlist = backtrace_list; backlist; backlist = backlist->next) | |
| 4754 { | |
| 4755 int nargs = backlist->nargs; | |
| 4756 int i; | |
| 4757 | |
| 4758 mark_object (*backlist->function); | |
| 1292 | 4759 if (nargs < 0 /* nargs == UNEVALLED || nargs == MANY */ |
| 4760 /* might be fake (internal profiling entry) */ | |
| 4761 && backlist->args) | |
| 428 | 4762 mark_object (backlist->args[0]); |
| 4763 else | |
| 4764 for (i = 0; i < nargs; i++) | |
| 4765 mark_object (backlist->args[i]); | |
| 4766 } | |
| 4767 } | |
| 4768 | |
| 4769 mark_profiling_info (); | |
| 4770 | |
| 4771 /* OK, now do the after-mark stuff. This is for things that | |
| 4772 are only marked when something else is marked (e.g. weak hash tables). | |
| 4773 There may be complex dependencies between such objects -- e.g. | |
| 4774 a weak hash table might be unmarked, but after processing a later | |
| 4775 weak hash table, the former one might get marked. So we have to | |
| 4776 iterate until nothing more gets marked. */ | |
| 1598 | 4777 #ifdef USE_KKCC |
| 4778 kkcc_marking (); | |
| 4779 #endif /* USE_KKCC */ | |
| 1590 | 4780 init_marking_ephemerons (); |
| 428 | 4781 while (finish_marking_weak_hash_tables () > 0 || |
| 887 | 4782 finish_marking_weak_lists () > 0 || |
| 1590 | 4783 continue_marking_ephemerons () > 0) |
|
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4784 #ifdef USE_KKCC |
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4785 { |
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4786 kkcc_marking (); |
|
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4787 } |
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4788 #else /* NOT USE_KKCC */ |
| 1590 | 4789 ; |
| 1598 | 4790 #endif /* USE_KKCC */ |
| 4791 | |
| 1590 | 4792 /* At this point, we know which objects need to be finalized: we |
| 4793 still need to resurrect them */ | |
| 4794 | |
| 4795 while (finish_marking_ephemerons () > 0 || | |
| 4796 finish_marking_weak_lists () > 0 || | |
| 4797 finish_marking_weak_hash_tables () > 0) | |
| 1643 | 4798 #ifdef USE_KKCC |
|
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4799 { |
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4800 kkcc_marking (); |
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4801 } |
| 1643 | 4802 kkcc_gc_stack_free (); |
| 1676 | 4803 #undef mark_object |
|
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4804 #else /* NOT USE_KKCC */ |
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4805 ; |
| 1643 | 4806 #endif /* USE_KKCC */ |
| 4807 | |
| 428 | 4808 /* And prune (this needs to be called after everything else has been |
| 4809 marked and before we do any sweeping). */ | |
| 4810 /* #### this is somewhat ad-hoc and should probably be an object | |
| 4811 method */ | |
| 4812 prune_weak_hash_tables (); | |
| 4813 prune_weak_lists (); | |
| 4814 prune_specifiers (); | |
| 4815 prune_syntax_tables (); | |
| 4816 | |
| 887 | 4817 prune_ephemerons (); |
| 858 | 4818 prune_weak_boxes (); |
| 4819 | |
| 428 | 4820 gc_sweep (); |
| 4821 | |
| 4822 consing_since_gc = 0; | |
| 4823 #ifndef DEBUG_XEMACS | |
| 4824 /* Allow you to set it really fucking low if you really want ... */ | |
| 4825 if (gc_cons_threshold < 10000) | |
| 4826 gc_cons_threshold = 10000; | |
| 4827 #endif | |
| 814 | 4828 recompute_need_to_garbage_collect (); |
| 428 | 4829 |
| 771 | 4830 inhibit_non_essential_printing_operations = 0; |
| 428 | 4831 gc_in_progress = 0; |
| 4832 | |
| 611 | 4833 run_post_gc_actions (); |
| 4834 | |
| 428 | 4835 /******* End of garbage collection ********/ |
| 4836 | |
| 4837 /* Now remove the GC cursor/message */ | |
| 4838 if (!noninteractive) | |
| 4839 { | |
| 4840 if (cursor_changed) | |
| 771 | 4841 Fset_frame_pointer (wrap_frame (f), pre_gc_cursor); |
| 428 | 4842 else if (!FRAME_STREAM_P (f)) |
| 4843 { | |
| 4844 /* Show "...done" only if the echo area would otherwise be empty. */ | |
| 4845 if (NILP (clear_echo_area (selected_frame (), | |
| 4846 Qgarbage_collecting, 0))) | |
| 4847 { | |
| 1154 | 4848 if (garbage_collection_messages) |
| 4849 { | |
| 4850 Lisp_Object args[2], whole_msg; | |
| 4851 args[0] = (STRINGP (Vgc_message) ? Vgc_message : | |
| 4852 build_msg_string (gc_default_message)); | |
| 4853 args[1] = build_msg_string ("... done"); | |
| 4854 whole_msg = Fconcat (2, args); | |
| 4855 echo_area_message (selected_frame (), (Ibyte *) 0, | |
| 4856 whole_msg, 0, -1, | |
| 4857 Qgarbage_collecting); | |
| 4858 } | |
| 428 | 4859 } |
| 4860 } | |
| 4861 } | |
| 4862 | |
| 4863 /* now stop inhibiting GC */ | |
| 771 | 4864 unbind_to (speccount); |
| 428 | 4865 |
| 4866 if (!breathing_space) | |
| 4867 { | |
| 4868 breathing_space = malloc (4096 - MALLOC_OVERHEAD); | |
| 4869 } | |
| 4870 | |
| 4871 UNGCPRO; | |
| 887 | 4872 |
| 4873 need_to_signal_post_gc = 1; | |
| 4874 funcall_allocation_flag = 1; | |
| 4875 | |
| 1292 | 4876 PROFILE_RECORD_EXITING_SECTION (QSin_garbage_collection); |
| 4877 | |
| 428 | 4878 return; |
| 4879 } | |
| 4880 | |
| 4881 /* Debugging aids. */ | |
| 4882 | |
| 4883 static Lisp_Object | |
| 771 | 4884 gc_plist_hack (const Char_ASCII *name, int value, Lisp_Object tail) |
| 428 | 4885 { |
| 4886 /* C doesn't have local functions (or closures, or GC, or readable syntax, | |
| 4887 or portable numeric datatypes, or bit-vectors, or characters, or | |
| 4888 arrays, or exceptions, or ...) */ | |
| 4889 return cons3 (intern (name), make_int (value), tail); | |
| 4890 } | |
| 4891 | |
| 4892 #define HACK_O_MATIC(type, name, pl) do { \ | |
| 4893 int s = 0; \ | |
| 4894 struct type##_block *x = current_##type##_block; \ | |
| 4895 while (x) { s += sizeof (*x) + MALLOC_OVERHEAD; x = x->prev; } \ | |
| 4896 (pl) = gc_plist_hack ((name), s, (pl)); \ | |
| 4897 } while (0) | |
| 4898 | |
| 4899 DEFUN ("garbage-collect", Fgarbage_collect, 0, 0, "", /* | |
| 4900 Reclaim storage for Lisp objects no longer needed. | |
| 4901 Return info on amount of space in use: | |
| 4902 ((USED-CONSES . FREE-CONSES) (USED-SYMS . FREE-SYMS) | |
| 4903 (USED-MARKERS . FREE-MARKERS) USED-STRING-CHARS USED-VECTOR-SLOTS | |
| 4904 PLIST) | |
| 4905 where `PLIST' is a list of alternating keyword/value pairs providing | |
| 4906 more detailed information. | |
| 4907 Garbage collection happens automatically if you cons more than | |
| 4908 `gc-cons-threshold' bytes of Lisp data since previous garbage collection. | |
| 4909 */ | |
| 4910 ()) | |
| 4911 { | |
| 4912 Lisp_Object pl = Qnil; | |
| 647 | 4913 int i; |
| 428 | 4914 int gc_count_vector_total_size = 0; |
| 4915 garbage_collect_1 (); | |
| 4916 | |
| 442 | 4917 for (i = 0; i < lrecord_type_count; i++) |
| 428 | 4918 { |
| 4919 if (lcrecord_stats[i].bytes_in_use != 0 | |
| 4920 || lcrecord_stats[i].bytes_freed != 0 | |
| 4921 || lcrecord_stats[i].instances_on_free_list != 0) | |
| 4922 { | |
| 4923 char buf [255]; | |
| 442 | 4924 const char *name = lrecord_implementations_table[i]->name; |
| 428 | 4925 int len = strlen (name); |
| 4926 /* save this for the FSFmacs-compatible part of the summary */ | |
| 460 | 4927 if (i == lrecord_type_vector) |
| 428 | 4928 gc_count_vector_total_size = |
| 4929 lcrecord_stats[i].bytes_in_use + lcrecord_stats[i].bytes_freed; | |
| 4930 | |
| 4931 sprintf (buf, "%s-storage", name); | |
| 4932 pl = gc_plist_hack (buf, lcrecord_stats[i].bytes_in_use, pl); | |
| 4933 /* Okay, simple pluralization check for `symbol-value-varalias' */ | |
| 4934 if (name[len-1] == 's') | |
| 4935 sprintf (buf, "%ses-freed", name); | |
| 4936 else | |
| 4937 sprintf (buf, "%ss-freed", name); | |
| 4938 if (lcrecord_stats[i].instances_freed != 0) | |
| 4939 pl = gc_plist_hack (buf, lcrecord_stats[i].instances_freed, pl); | |
| 4940 if (name[len-1] == 's') | |
| 4941 sprintf (buf, "%ses-on-free-list", name); | |
| 4942 else | |
| 4943 sprintf (buf, "%ss-on-free-list", name); | |
| 4944 if (lcrecord_stats[i].instances_on_free_list != 0) | |
| 4945 pl = gc_plist_hack (buf, lcrecord_stats[i].instances_on_free_list, | |
| 4946 pl); | |
| 4947 if (name[len-1] == 's') | |
| 4948 sprintf (buf, "%ses-used", name); | |
| 4949 else | |
| 4950 sprintf (buf, "%ss-used", name); | |
| 4951 pl = gc_plist_hack (buf, lcrecord_stats[i].instances_in_use, pl); | |
| 4952 } | |
| 4953 } | |
| 4954 | |
| 4955 HACK_O_MATIC (extent, "extent-storage", pl); | |
| 4956 pl = gc_plist_hack ("extents-free", gc_count_num_extent_freelist, pl); | |
| 4957 pl = gc_plist_hack ("extents-used", gc_count_num_extent_in_use, pl); | |
| 4958 HACK_O_MATIC (event, "event-storage", pl); | |
| 4959 pl = gc_plist_hack ("events-free", gc_count_num_event_freelist, pl); | |
| 4960 pl = gc_plist_hack ("events-used", gc_count_num_event_in_use, pl); | |
| 4961 HACK_O_MATIC (marker, "marker-storage", pl); | |
| 4962 pl = gc_plist_hack ("markers-free", gc_count_num_marker_freelist, pl); | |
| 4963 pl = gc_plist_hack ("markers-used", gc_count_num_marker_in_use, pl); | |
| 4964 HACK_O_MATIC (float, "float-storage", pl); | |
| 4965 pl = gc_plist_hack ("floats-free", gc_count_num_float_freelist, pl); | |
| 4966 pl = gc_plist_hack ("floats-used", gc_count_num_float_in_use, pl); | |
| 1983 | 4967 #ifdef HAVE_BIGNUM |
| 4968 HACK_O_MATIC (bignum, "bignum-storage", pl); | |
| 4969 pl = gc_plist_hack ("bignums-free", gc_count_num_bignum_freelist, pl); | |
| 4970 pl = gc_plist_hack ("bignums-used", gc_count_num_bignum_in_use, pl); | |
| 4971 #endif /* HAVE_BIGNUM */ | |
| 4972 #ifdef HAVE_RATIO | |
| 4973 HACK_O_MATIC (ratio, "ratio-storage", pl); | |
| 4974 pl = gc_plist_hack ("ratios-free", gc_count_num_ratio_freelist, pl); | |
| 4975 pl = gc_plist_hack ("ratios-used", gc_count_num_ratio_in_use, pl); | |
| 4976 #endif /* HAVE_RATIO */ | |
| 4977 #ifdef HAVE_BIGFLOAT | |
| 4978 HACK_O_MATIC (bigfloat, "bigfloat-storage", pl); | |
| 4979 pl = gc_plist_hack ("bigfloats-free", gc_count_num_bigfloat_freelist, pl); | |
| 4980 pl = gc_plist_hack ("bigfloats-used", gc_count_num_bigfloat_in_use, pl); | |
| 4981 #endif /* HAVE_BIGFLOAT */ | |
| 428 | 4982 HACK_O_MATIC (string, "string-header-storage", pl); |
| 4983 pl = gc_plist_hack ("long-strings-total-length", | |
| 4984 gc_count_string_total_size | |
| 4985 - gc_count_short_string_total_size, pl); | |
| 4986 HACK_O_MATIC (string_chars, "short-string-storage", pl); | |
| 4987 pl = gc_plist_hack ("short-strings-total-length", | |
| 4988 gc_count_short_string_total_size, pl); | |
| 4989 pl = gc_plist_hack ("strings-free", gc_count_num_string_freelist, pl); | |
| 4990 pl = gc_plist_hack ("long-strings-used", | |
| 4991 gc_count_num_string_in_use | |
| 4992 - gc_count_num_short_string_in_use, pl); | |
| 4993 pl = gc_plist_hack ("short-strings-used", | |
| 4994 gc_count_num_short_string_in_use, pl); | |
| 4995 | |
| 4996 HACK_O_MATIC (compiled_function, "compiled-function-storage", pl); | |
| 4997 pl = gc_plist_hack ("compiled-functions-free", | |
| 4998 gc_count_num_compiled_function_freelist, pl); | |
| 4999 pl = gc_plist_hack ("compiled-functions-used", | |
| 5000 gc_count_num_compiled_function_in_use, pl); | |
| 5001 | |
| 5002 HACK_O_MATIC (symbol, "symbol-storage", pl); | |
| 5003 pl = gc_plist_hack ("symbols-free", gc_count_num_symbol_freelist, pl); | |
| 5004 pl = gc_plist_hack ("symbols-used", gc_count_num_symbol_in_use, pl); | |
| 5005 | |
| 5006 HACK_O_MATIC (cons, "cons-storage", pl); | |
| 5007 pl = gc_plist_hack ("conses-free", gc_count_num_cons_freelist, pl); | |
| 5008 pl = gc_plist_hack ("conses-used", gc_count_num_cons_in_use, pl); | |
| 5009 | |
| 5010 /* The things we do for backwards-compatibility */ | |
| 5011 return | |
| 5012 list6 (Fcons (make_int (gc_count_num_cons_in_use), | |
| 5013 make_int (gc_count_num_cons_freelist)), | |
| 5014 Fcons (make_int (gc_count_num_symbol_in_use), | |
| 5015 make_int (gc_count_num_symbol_freelist)), | |
| 5016 Fcons (make_int (gc_count_num_marker_in_use), | |
| 5017 make_int (gc_count_num_marker_freelist)), | |
| 5018 make_int (gc_count_string_total_size), | |
| 5019 make_int (gc_count_vector_total_size), | |
| 5020 pl); | |
| 5021 } | |
| 5022 #undef HACK_O_MATIC | |
| 5023 | |
| 5024 DEFUN ("consing-since-gc", Fconsing_since_gc, 0, 0, "", /* | |
| 5025 Return the number of bytes consed since the last garbage collection. | |
| 5026 \"Consed\" is a misnomer in that this actually counts allocation | |
| 5027 of all different kinds of objects, not just conses. | |
| 5028 | |
| 5029 If this value exceeds `gc-cons-threshold', a garbage collection happens. | |
| 5030 */ | |
| 5031 ()) | |
| 5032 { | |
| 5033 return make_int (consing_since_gc); | |
| 5034 } | |
| 5035 | |
| 440 | 5036 #if 0 |
| 444 | 5037 DEFUN ("memory-limit", Fmemory_limit, 0, 0, 0, /* |
| 801 | 5038 Return the address of the last byte XEmacs has allocated, divided by 1024. |
| 5039 This may be helpful in debugging XEmacs's memory usage. | |
| 428 | 5040 The value is divided by 1024 to make sure it will fit in a lisp integer. |
| 5041 */ | |
| 5042 ()) | |
| 5043 { | |
| 5044 return make_int ((EMACS_INT) sbrk (0) / 1024); | |
| 5045 } | |
| 440 | 5046 #endif |
| 428 | 5047 |
| 801 | 5048 DEFUN ("memory-usage", Fmemory_usage, 0, 0, 0, /* |
| 5049 Return the total number of bytes used by the data segment in XEmacs. | |
| 5050 This may be helpful in debugging XEmacs's memory usage. | |
| 5051 */ | |
| 5052 ()) | |
| 5053 { | |
| 5054 return make_int (total_data_usage ()); | |
| 5055 } | |
| 5056 | |
| 851 | 5057 void |
| 5058 recompute_funcall_allocation_flag (void) | |
| 5059 { | |
| 887 | 5060 funcall_allocation_flag = |
| 5061 need_to_garbage_collect || | |
| 5062 need_to_check_c_alloca || | |
| 5063 need_to_signal_post_gc; | |
| 851 | 5064 } |
| 5065 | |
| 801 | 5066 /* True if it's time to garbage collect now. */ |
| 814 | 5067 static void |
| 5068 recompute_need_to_garbage_collect (void) | |
| 801 | 5069 { |
| 5070 if (always_gc) | |
| 814 | 5071 need_to_garbage_collect = 1; |
| 5072 else | |
| 5073 need_to_garbage_collect = | |
| 5074 (consing_since_gc > gc_cons_threshold | |
| 5075 #if 0 /* #### implement this better */ | |
| 5076 && | |
| 5077 (100 * consing_since_gc) / total_data_usage () >= | |
| 5078 gc_cons_percentage | |
| 5079 #endif /* 0 */ | |
| 5080 ); | |
| 851 | 5081 recompute_funcall_allocation_flag (); |
| 801 | 5082 } |
| 5083 | |
| 428 | 5084 |
| 5085 int | |
| 5086 object_dead_p (Lisp_Object obj) | |
| 5087 { | |
| 5088 return ((BUFFERP (obj) && !BUFFER_LIVE_P (XBUFFER (obj))) || | |
| 5089 (FRAMEP (obj) && !FRAME_LIVE_P (XFRAME (obj))) || | |
| 5090 (WINDOWP (obj) && !WINDOW_LIVE_P (XWINDOW (obj))) || | |
| 5091 (DEVICEP (obj) && !DEVICE_LIVE_P (XDEVICE (obj))) || | |
| 5092 (CONSOLEP (obj) && !CONSOLE_LIVE_P (XCONSOLE (obj))) || | |
| 5093 (EVENTP (obj) && !EVENT_LIVE_P (XEVENT (obj))) || | |
| 5094 (EXTENTP (obj) && !EXTENT_LIVE_P (XEXTENT (obj)))); | |
| 5095 } | |
| 5096 | |
| 5097 #ifdef MEMORY_USAGE_STATS | |
| 5098 | |
| 5099 /* Attempt to determine the actual amount of space that is used for | |
| 5100 the block allocated starting at PTR, supposedly of size "CLAIMED_SIZE". | |
| 5101 | |
| 5102 It seems that the following holds: | |
| 5103 | |
| 5104 1. When using the old allocator (malloc.c): | |
| 5105 | |
| 5106 -- blocks are always allocated in chunks of powers of two. For | |
| 5107 each block, there is an overhead of 8 bytes if rcheck is not | |
| 5108 defined, 20 bytes if it is defined. In other words, a | |
| 5109 one-byte allocation needs 8 bytes of overhead for a total of | |
| 5110 9 bytes, and needs to have 16 bytes of memory chunked out for | |
| 5111 it. | |
| 5112 | |
| 5113 2. When using the new allocator (gmalloc.c): | |
| 5114 | |
| 5115 -- blocks are always allocated in chunks of powers of two up | |
| 5116 to 4096 bytes. Larger blocks are allocated in chunks of | |
| 5117 an integral multiple of 4096 bytes. The minimum block | |
| 5118 size is 2*sizeof (void *), or 16 bytes if SUNOS_LOCALTIME_BUG | |
| 5119 is defined. There is no per-block overhead, but there | |
| 5120 is an overhead of 3*sizeof (size_t) for each 4096 bytes | |
| 5121 allocated. | |
| 5122 | |
| 5123 3. When using the system malloc, anything goes, but they are | |
| 5124 generally slower and more space-efficient than the GNU | |
| 5125 allocators. One possibly reasonable assumption to make | |
| 5126 for want of better data is that sizeof (void *), or maybe | |
| 5127 2 * sizeof (void *), is required as overhead and that | |
| 5128 blocks are allocated in the minimum required size except | |
| 5129 that some minimum block size is imposed (e.g. 16 bytes). */ | |
| 5130 | |
| 665 | 5131 Bytecount |
| 5132 malloced_storage_size (void *ptr, Bytecount claimed_size, | |
| 428 | 5133 struct overhead_stats *stats) |
| 5134 { | |
| 665 | 5135 Bytecount orig_claimed_size = claimed_size; |
| 428 | 5136 |
| 5137 #ifdef GNU_MALLOC | |
| 665 | 5138 if (claimed_size < (Bytecount) (2 * sizeof (void *))) |
| 428 | 5139 claimed_size = 2 * sizeof (void *); |
| 5140 # ifdef SUNOS_LOCALTIME_BUG | |
| 5141 if (claimed_size < 16) | |
| 5142 claimed_size = 16; | |
| 5143 # endif | |
| 5144 if (claimed_size < 4096) | |
| 5145 { | |
| 5146 int log = 1; | |
| 5147 | |
| 5148 /* compute the log base two, more or less, then use it to compute | |
| 5149 the block size needed. */ | |
| 5150 claimed_size--; | |
| 5151 /* It's big, it's heavy, it's wood! */ | |
| 5152 while ((claimed_size /= 2) != 0) | |
| 5153 ++log; | |
| 5154 claimed_size = 1; | |
| 5155 /* It's better than bad, it's good! */ | |
| 5156 while (log > 0) | |
| 5157 { | |
| 5158 claimed_size *= 2; | |
| 5159 log--; | |
| 5160 } | |
| 5161 /* We have to come up with some average about the amount of | |
| 5162 blocks used. */ | |
| 665 | 5163 if ((Bytecount) (rand () & 4095) < claimed_size) |
| 428 | 5164 claimed_size += 3 * sizeof (void *); |
| 5165 } | |
| 5166 else | |
| 5167 { | |
| 5168 claimed_size += 4095; | |
| 5169 claimed_size &= ~4095; | |
| 5170 claimed_size += (claimed_size / 4096) * 3 * sizeof (size_t); | |
| 5171 } | |
| 5172 | |
| 5173 #elif defined (SYSTEM_MALLOC) | |
| 5174 | |
| 5175 if (claimed_size < 16) | |
| 5176 claimed_size = 16; | |
| 5177 claimed_size += 2 * sizeof (void *); | |
| 5178 | |
| 5179 #else /* old GNU allocator */ | |
| 5180 | |
| 5181 # ifdef rcheck /* #### may not be defined here */ | |
| 5182 claimed_size += 20; | |
| 5183 # else | |
| 5184 claimed_size += 8; | |
| 5185 # endif | |
| 5186 { | |
| 5187 int log = 1; | |
| 5188 | |
| 5189 /* compute the log base two, more or less, then use it to compute | |
| 5190 the block size needed. */ | |
| 5191 claimed_size--; | |
| 5192 /* It's big, it's heavy, it's wood! */ | |
| 5193 while ((claimed_size /= 2) != 0) | |
| 5194 ++log; | |
| 5195 claimed_size = 1; | |
| 5196 /* It's better than bad, it's good! */ | |
| 5197 while (log > 0) | |
| 5198 { | |
| 5199 claimed_size *= 2; | |
| 5200 log--; | |
| 5201 } | |
| 5202 } | |
| 5203 | |
| 5204 #endif /* old GNU allocator */ | |
| 5205 | |
| 5206 if (stats) | |
| 5207 { | |
| 5208 stats->was_requested += orig_claimed_size; | |
| 5209 stats->malloc_overhead += claimed_size - orig_claimed_size; | |
| 5210 } | |
| 5211 return claimed_size; | |
| 5212 } | |
| 5213 | |
| 665 | 5214 Bytecount |
| 5215 fixed_type_block_overhead (Bytecount size) | |
| 428 | 5216 { |
| 665 | 5217 Bytecount per_block = TYPE_ALLOC_SIZE (cons, unsigned char); |
| 5218 Bytecount overhead = 0; | |
| 5219 Bytecount storage_size = malloced_storage_size (0, per_block, 0); | |
| 428 | 5220 while (size >= per_block) |
| 5221 { | |
| 5222 size -= per_block; | |
| 5223 overhead += sizeof (void *) + per_block - storage_size; | |
| 5224 } | |
| 5225 if (rand () % per_block < size) | |
| 5226 overhead += sizeof (void *) + per_block - storage_size; | |
| 5227 return overhead; | |
| 5228 } | |
| 5229 | |
| 5230 #endif /* MEMORY_USAGE_STATS */ | |
| 5231 | |
| 5232 | |
| 5233 /* Initialization */ | |
| 771 | 5234 static void |
| 1204 | 5235 common_init_alloc_early (void) |
| 428 | 5236 { |
| 771 | 5237 #ifndef Qzero |
| 5238 Qzero = make_int (0); /* Only used if Lisp_Object is a union type */ | |
| 5239 #endif | |
| 5240 | |
| 5241 #ifndef Qnull_pointer | |
| 5242 /* C guarantees that Qnull_pointer will be initialized to all 0 bits, | |
| 5243 so the following is actually a no-op. */ | |
| 793 | 5244 Qnull_pointer = wrap_pointer_1 (0); |
| 771 | 5245 #endif |
| 5246 | |
| 428 | 5247 gc_generation_number[0] = 0; |
| 5248 breathing_space = 0; | |
| 771 | 5249 Vgc_message = Qzero; |
| 428 | 5250 all_lcrecords = 0; |
| 5251 ignore_malloc_warnings = 1; | |
| 5252 #ifdef DOUG_LEA_MALLOC | |
| 5253 mallopt (M_TRIM_THRESHOLD, 128*1024); /* trim threshold */ | |
| 5254 mallopt (M_MMAP_THRESHOLD, 64*1024); /* mmap threshold */ | |
| 5255 #if 0 /* Moved to emacs.c */ | |
| 5256 mallopt (M_MMAP_MAX, 64); /* max. number of mmap'ed areas */ | |
| 5257 #endif | |
| 5258 #endif | |
| 5259 init_string_alloc (); | |
| 5260 init_string_chars_alloc (); | |
| 5261 init_cons_alloc (); | |
| 5262 init_symbol_alloc (); | |
| 5263 init_compiled_function_alloc (); | |
| 5264 init_float_alloc (); | |
| 1983 | 5265 #ifdef HAVE_BIGNUM |
| 5266 init_bignum_alloc (); | |
| 5267 #endif | |
| 5268 #ifdef HAVE_RATIO | |
| 5269 init_ratio_alloc (); | |
| 5270 #endif | |
| 5271 #ifdef HAVE_BIGFLOAT | |
| 5272 init_bigfloat_alloc (); | |
| 5273 #endif | |
| 428 | 5274 init_marker_alloc (); |
| 5275 init_extent_alloc (); | |
| 5276 init_event_alloc (); | |
| 1204 | 5277 #ifdef EVENT_DATA_AS_OBJECTS |
| 934 | 5278 init_key_data_alloc (); |
| 5279 init_button_data_alloc (); | |
| 5280 init_motion_data_alloc (); | |
| 5281 init_process_data_alloc (); | |
| 5282 init_timeout_data_alloc (); | |
| 5283 init_magic_data_alloc (); | |
| 5284 init_magic_eval_data_alloc (); | |
| 5285 init_eval_data_alloc (); | |
| 5286 init_misc_user_data_alloc (); | |
| 1204 | 5287 #endif /* EVENT_DATA_AS_OBJECTS */ |
| 428 | 5288 |
| 5289 ignore_malloc_warnings = 0; | |
| 5290 | |
| 452 | 5291 if (staticpros_nodump) |
| 5292 Dynarr_free (staticpros_nodump); | |
| 5293 staticpros_nodump = Dynarr_new2 (Lisp_Object_ptr_dynarr, Lisp_Object *); | |
| 5294 Dynarr_resize (staticpros_nodump, 100); /* merely a small optimization */ | |
| 771 | 5295 #ifdef DEBUG_XEMACS |
| 5296 if (staticpro_nodump_names) | |
| 5297 Dynarr_free (staticpro_nodump_names); | |
| 5298 staticpro_nodump_names = Dynarr_new2 (char_ptr_dynarr, char *); | |
| 5299 Dynarr_resize (staticpro_nodump_names, 100); /* ditto */ | |
| 5300 #endif | |
| 428 | 5301 |
| 5302 consing_since_gc = 0; | |
| 814 | 5303 need_to_garbage_collect = always_gc; |
| 851 | 5304 need_to_check_c_alloca = 0; |
| 5305 funcall_allocation_flag = 0; | |
| 5306 funcall_alloca_count = 0; | |
| 814 | 5307 |
| 428 | 5308 #if 1 |
| 5309 gc_cons_threshold = 500000; /* XEmacs change */ | |
| 5310 #else | |
| 5311 gc_cons_threshold = 15000; /* debugging */ | |
| 5312 #endif | |
| 801 | 5313 gc_cons_percentage = 0; /* #### 20; Don't have an accurate measure of |
| 5314 memory usage on Windows; not verified on other | |
| 5315 systems */ | |
| 428 | 5316 lrecord_uid_counter = 259; |
| 5317 debug_string_purity = 0; | |
| 5318 | |
| 5319 gc_currently_forbidden = 0; | |
| 5320 gc_hooks_inhibited = 0; | |
| 5321 | |
| 800 | 5322 #ifdef ERROR_CHECK_TYPES |
| 428 | 5323 ERROR_ME.really_unlikely_name_to_have_accidentally_in_a_non_errb_structure = |
| 5324 666; | |
| 5325 ERROR_ME_NOT. | |
| 5326 really_unlikely_name_to_have_accidentally_in_a_non_errb_structure = 42; | |
| 5327 ERROR_ME_WARN. | |
| 5328 really_unlikely_name_to_have_accidentally_in_a_non_errb_structure = | |
| 5329 3333632; | |
| 793 | 5330 ERROR_ME_DEBUG_WARN. |
| 5331 really_unlikely_name_to_have_accidentally_in_a_non_errb_structure = | |
| 5332 8675309; | |
| 800 | 5333 #endif /* ERROR_CHECK_TYPES */ |
| 428 | 5334 } |
| 5335 | |
| 771 | 5336 static void |
| 5337 init_lcrecord_lists (void) | |
| 5338 { | |
| 5339 int i; | |
| 5340 | |
| 5341 for (i = 0; i < countof (lrecord_implementations_table); i++) | |
| 5342 { | |
| 5343 all_lcrecord_lists[i] = Qzero; /* Qnil not yet set */ | |
| 5344 staticpro_nodump (&all_lcrecord_lists[i]); | |
| 5345 } | |
| 5346 } | |
| 5347 | |
| 5348 void | |
| 1204 | 5349 init_alloc_early (void) |
| 771 | 5350 { |
| 1204 | 5351 #if defined (__cplusplus) && defined (ERROR_CHECK_GC) |
| 5352 static struct gcpro initial_gcpro; | |
| 5353 | |
| 5354 initial_gcpro.next = 0; | |
| 5355 initial_gcpro.var = &Qnil; | |
| 5356 initial_gcpro.nvars = 1; | |
| 5357 gcprolist = &initial_gcpro; | |
| 5358 #else | |
| 5359 gcprolist = 0; | |
| 5360 #endif /* defined (__cplusplus) && defined (ERROR_CHECK_GC) */ | |
| 5361 } | |
| 5362 | |
| 5363 void | |
| 5364 reinit_alloc_early (void) | |
| 5365 { | |
| 5366 common_init_alloc_early (); | |
| 771 | 5367 init_lcrecord_lists (); |
| 5368 } | |
| 5369 | |
| 428 | 5370 void |
| 5371 init_alloc_once_early (void) | |
| 5372 { | |
| 1204 | 5373 common_init_alloc_early (); |
| 428 | 5374 |
| 442 | 5375 { |
| 5376 int i; | |
| 5377 for (i = 0; i < countof (lrecord_implementations_table); i++) | |
| 5378 lrecord_implementations_table[i] = 0; | |
| 5379 } | |
| 5380 | |
| 5381 INIT_LRECORD_IMPLEMENTATION (cons); | |
| 5382 INIT_LRECORD_IMPLEMENTATION (vector); | |
| 5383 INIT_LRECORD_IMPLEMENTATION (string); | |
| 5384 INIT_LRECORD_IMPLEMENTATION (lcrecord_list); | |
| 1204 | 5385 INIT_LRECORD_IMPLEMENTATION (free); |
| 428 | 5386 |
| 452 | 5387 staticpros = Dynarr_new2 (Lisp_Object_ptr_dynarr, Lisp_Object *); |
| 5388 Dynarr_resize (staticpros, 1410); /* merely a small optimization */ | |
| 5389 dump_add_root_struct_ptr (&staticpros, &staticpros_description); | |
| 771 | 5390 #ifdef DEBUG_XEMACS |
| 5391 staticpro_names = Dynarr_new2 (char_ptr_dynarr, char *); | |
| 5392 Dynarr_resize (staticpro_names, 1410); /* merely a small optimization */ | |
| 5393 dump_add_root_struct_ptr (&staticpro_names, &staticpro_names_description); | |
| 5394 #endif | |
| 5395 | |
| 5396 init_lcrecord_lists (); | |
| 428 | 5397 } |
| 5398 | |
| 5399 void | |
| 5400 syms_of_alloc (void) | |
| 5401 { | |
| 442 | 5402 DEFSYMBOL (Qpre_gc_hook); |
| 5403 DEFSYMBOL (Qpost_gc_hook); | |
| 5404 DEFSYMBOL (Qgarbage_collecting); | |
| 428 | 5405 |
| 5406 DEFSUBR (Fcons); | |
| 5407 DEFSUBR (Flist); | |
| 5408 DEFSUBR (Fvector); | |
| 5409 DEFSUBR (Fbit_vector); | |
| 5410 DEFSUBR (Fmake_byte_code); | |
| 5411 DEFSUBR (Fmake_list); | |
| 5412 DEFSUBR (Fmake_vector); | |
| 5413 DEFSUBR (Fmake_bit_vector); | |
| 5414 DEFSUBR (Fmake_string); | |
| 5415 DEFSUBR (Fstring); | |
| 5416 DEFSUBR (Fmake_symbol); | |
| 5417 DEFSUBR (Fmake_marker); | |
| 5418 DEFSUBR (Fpurecopy); | |
| 5419 DEFSUBR (Fgarbage_collect); | |
| 440 | 5420 #if 0 |
| 428 | 5421 DEFSUBR (Fmemory_limit); |
| 440 | 5422 #endif |
| 801 | 5423 DEFSUBR (Fmemory_usage); |
| 428 | 5424 DEFSUBR (Fconsing_since_gc); |
| 5425 } | |
| 5426 | |
| 5427 void | |
| 5428 vars_of_alloc (void) | |
| 5429 { | |
| 1292 | 5430 QSin_garbage_collection = build_msg_string ("(in garbage collection)"); |
| 5431 staticpro (&QSin_garbage_collection); | |
| 5432 | |
| 428 | 5433 DEFVAR_INT ("gc-cons-threshold", &gc_cons_threshold /* |
| 5434 *Number of bytes of consing between garbage collections. | |
| 5435 \"Consing\" is a misnomer in that this actually counts allocation | |
| 5436 of all different kinds of objects, not just conses. | |
| 5437 Garbage collection can happen automatically once this many bytes have been | |
| 5438 allocated since the last garbage collection. All data types count. | |
| 5439 | |
| 5440 Garbage collection happens automatically when `eval' or `funcall' are | |
| 5441 called. (Note that `funcall' is called implicitly as part of evaluation.) | |
| 5442 By binding this temporarily to a large number, you can effectively | |
| 5443 prevent garbage collection during a part of the program. | |
| 5444 | |
| 853 | 5445 Normally, you cannot set this value less than 10,000 (if you do, it is |
| 5446 automatically reset during the next garbage collection). However, if | |
| 5447 XEmacs was compiled with DEBUG_XEMACS, this does not happen, allowing | |
| 5448 you to set this value very low to track down problems with insufficient | |
| 5449 GCPRO'ing. If you set this to a negative number, garbage collection will | |
| 5450 happen at *EVERY* call to `eval' or `funcall'. This is an extremely | |
| 5451 effective way to check GCPRO problems, but be warned that your XEmacs | |
| 5452 will be unusable! You almost certainly won't have the patience to wait | |
| 5453 long enough to be able to set it back. | |
| 5454 | |
| 428 | 5455 See also `consing-since-gc'. |
| 5456 */ ); | |
| 5457 | |
| 801 | 5458 DEFVAR_INT ("gc-cons-percentage", &gc_cons_percentage /* |
| 5459 *Percentage of memory allocated between garbage collections. | |
| 5460 | |
| 5461 Garbage collection will happen if this percentage of the total amount of | |
| 5462 memory used for data has been allocated since the last garbage collection. | |
| 5463 However, it will not happen if less than `gc-cons-threshold' bytes have | |
| 5464 been allocated -- this sets an absolute minimum in case very little data | |
| 5465 has been allocated or the percentage is set very low. Set this to 0 to | |
| 5466 have garbage collection always happen after `gc-cons-threshold' bytes have | |
| 5467 been allocated, regardless of current memory usage. | |
| 5468 | |
| 5469 Garbage collection happens automatically when `eval' or `funcall' are | |
| 5470 called. (Note that `funcall' is called implicitly as part of evaluation.) | |
| 5471 By binding this temporarily to a large number, you can effectively | |
| 5472 prevent garbage collection during a part of the program. | |
| 5473 | |
| 5474 See also `consing-since-gc'. | |
| 5475 */ ); | |
| 5476 | |
| 428 | 5477 #ifdef DEBUG_XEMACS |
| 5478 DEFVAR_INT ("debug-allocation", &debug_allocation /* | |
| 5479 If non-zero, print out information to stderr about all objects allocated. | |
| 5480 See also `debug-allocation-backtrace-length'. | |
| 5481 */ ); | |
| 5482 debug_allocation = 0; | |
| 5483 | |
| 5484 DEFVAR_INT ("debug-allocation-backtrace-length", | |
| 5485 &debug_allocation_backtrace_length /* | |
| 5486 Length (in stack frames) of short backtrace printed out by `debug-allocation'. | |
| 5487 */ ); | |
| 5488 debug_allocation_backtrace_length = 2; | |
| 5489 #endif | |
| 5490 | |
| 5491 DEFVAR_BOOL ("purify-flag", &purify_flag /* | |
| 5492 Non-nil means loading Lisp code in order to dump an executable. | |
| 5493 This means that certain objects should be allocated in readonly space. | |
| 5494 */ ); | |
| 5495 | |
| 1154 | 5496 DEFVAR_BOOL ("garbage-collection-messages", &garbage_collection_messages /* |
| 5497 Non-nil means display messages at start and end of garbage collection. | |
| 5498 */ ); | |
| 5499 garbage_collection_messages = 0; | |
| 5500 | |
| 428 | 5501 DEFVAR_LISP ("pre-gc-hook", &Vpre_gc_hook /* |
| 5502 Function or functions to be run just before each garbage collection. | |
| 5503 Interrupts, garbage collection, and errors are inhibited while this hook | |
| 5504 runs, so be extremely careful in what you add here. In particular, avoid | |
| 5505 consing, and do not interact with the user. | |
| 5506 */ ); | |
| 5507 Vpre_gc_hook = Qnil; | |
| 5508 | |
| 5509 DEFVAR_LISP ("post-gc-hook", &Vpost_gc_hook /* | |
| 5510 Function or functions to be run just after each garbage collection. | |
| 5511 Interrupts, garbage collection, and errors are inhibited while this hook | |
| 887 | 5512 runs. Each hook is called with one argument which is an alist with |
| 5513 finalization data. | |
| 428 | 5514 */ ); |
| 5515 Vpost_gc_hook = Qnil; | |
| 5516 | |
| 5517 DEFVAR_LISP ("gc-message", &Vgc_message /* | |
| 5518 String to print to indicate that a garbage collection is in progress. | |
| 5519 This is printed in the echo area. If the selected frame is on a | |
| 5520 window system and `gc-pointer-glyph' specifies a value (i.e. a pointer | |
| 5521 image instance) in the domain of the selected frame, the mouse pointer | |
| 5522 will change instead of this message being printed. | |
| 5523 */ ); | |
| 5524 Vgc_message = build_string (gc_default_message); | |
| 5525 | |
| 5526 DEFVAR_LISP ("gc-pointer-glyph", &Vgc_pointer_glyph /* | |
| 5527 Pointer glyph used to indicate that a garbage collection is in progress. | |
| 5528 If the selected window is on a window system and this glyph specifies a | |
| 5529 value (i.e. a pointer image instance) in the domain of the selected | |
| 5530 window, the pointer will be changed as specified during garbage collection. | |
| 5531 Otherwise, a message will be printed in the echo area, as controlled | |
| 5532 by `gc-message'. | |
| 5533 */ ); | |
| 5534 } | |
| 5535 | |
| 5536 void | |
| 5537 complex_vars_of_alloc (void) | |
| 5538 { | |
| 5539 Vgc_pointer_glyph = Fmake_glyph_internal (Qpointer); | |
| 5540 } |