Commit | Line | Data |
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7146af97 | 1 | /* Storage allocation and gc for GNU Emacs Lisp interpreter. |
630909a5 | 2 | Copyright (C) 1985, 86, 88, 93, 94, 95, 97, 98, 1999, 2000, 2001, 2002 |
4a2f9c6a | 3 | Free Software Foundation, Inc. |
7146af97 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
7c299e7a | 9 | the Free Software Foundation; either version 2, or (at your option) |
7146af97 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
7146af97 | 21 | |
18160b98 | 22 | #include <config.h> |
e9b309ac | 23 | #include <stdio.h> |
92939d31 | 24 | |
68c45bf0 | 25 | /* Note that this declares bzero on OSF/1. How dumb. */ |
2e471eb5 | 26 | |
68c45bf0 | 27 | #include <signal.h> |
92939d31 | 28 | |
877935b1 GM |
29 | /* GC_MALLOC_CHECK defined means perform validity checks of malloc'd |
30 | memory. Can do this only if using gmalloc.c. */ | |
31 | ||
32 | #if defined SYSTEM_MALLOC || defined DOUG_LEA_MALLOC | |
33 | #undef GC_MALLOC_CHECK | |
34 | #endif | |
35 | ||
7539e11f KR |
36 | /* This file is part of the core Lisp implementation, and thus must |
37 | deal with the real data structures. If the Lisp implementation is | |
38 | replaced, this file likely will not be used. */ | |
2e471eb5 | 39 | |
7539e11f | 40 | #undef HIDE_LISP_IMPLEMENTATION |
7146af97 | 41 | #include "lisp.h" |
ece93c02 | 42 | #include "process.h" |
d5e35230 | 43 | #include "intervals.h" |
4c0be5f4 | 44 | #include "puresize.h" |
7146af97 JB |
45 | #include "buffer.h" |
46 | #include "window.h" | |
2538fae4 | 47 | #include "keyboard.h" |
502b9b64 | 48 | #include "frame.h" |
9ac0d9e0 | 49 | #include "blockinput.h" |
e54daa22 | 50 | #include "charset.h" |
e065a56e | 51 | #include "syssignal.h" |
34400008 | 52 | #include <setjmp.h> |
e065a56e | 53 | |
bf952fb6 DL |
54 | #ifdef HAVE_UNISTD_H |
55 | #include <unistd.h> | |
56 | #else | |
57 | extern POINTER_TYPE *sbrk (); | |
58 | #endif | |
ee1eea5c | 59 | |
d1658221 | 60 | #ifdef DOUG_LEA_MALLOC |
2e471eb5 | 61 | |
d1658221 | 62 | #include <malloc.h> |
3e60b029 DL |
63 | /* malloc.h #defines this as size_t, at least in glibc2. */ |
64 | #ifndef __malloc_size_t | |
d1658221 | 65 | #define __malloc_size_t int |
3e60b029 | 66 | #endif |
81d492d5 | 67 | |
2e471eb5 GM |
68 | /* Specify maximum number of areas to mmap. It would be nice to use a |
69 | value that explicitly means "no limit". */ | |
70 | ||
81d492d5 RS |
71 | #define MMAP_MAX_AREAS 100000000 |
72 | ||
2e471eb5 GM |
73 | #else /* not DOUG_LEA_MALLOC */ |
74 | ||
276cbe5a RS |
75 | /* The following come from gmalloc.c. */ |
76 | ||
276cbe5a | 77 | #define __malloc_size_t size_t |
276cbe5a | 78 | extern __malloc_size_t _bytes_used; |
3e60b029 | 79 | extern __malloc_size_t __malloc_extra_blocks; |
2e471eb5 GM |
80 | |
81 | #endif /* not DOUG_LEA_MALLOC */ | |
276cbe5a | 82 | |
7146af97 JB |
83 | /* Macro to verify that storage intended for Lisp objects is not |
84 | out of range to fit in the space for a pointer. | |
85 | ADDRESS is the start of the block, and SIZE | |
86 | is the amount of space within which objects can start. */ | |
2e471eb5 | 87 | |
7146af97 JB |
88 | #define VALIDATE_LISP_STORAGE(address, size) \ |
89 | do \ | |
90 | { \ | |
91 | Lisp_Object val; \ | |
45d12a89 | 92 | XSETCONS (val, (char *) address + size); \ |
7146af97 JB |
93 | if ((char *) XCONS (val) != (char *) address + size) \ |
94 | { \ | |
9ac0d9e0 | 95 | xfree (address); \ |
7146af97 JB |
96 | memory_full (); \ |
97 | } \ | |
98 | } while (0) | |
99 | ||
276cbe5a | 100 | /* Value of _bytes_used, when spare_memory was freed. */ |
2e471eb5 | 101 | |
276cbe5a RS |
102 | static __malloc_size_t bytes_used_when_full; |
103 | ||
2e471eb5 GM |
104 | /* Mark, unmark, query mark bit of a Lisp string. S must be a pointer |
105 | to a struct Lisp_String. */ | |
106 | ||
cc2d8c6b KR |
107 | #define MARK_STRING(S) ((S)->size |= MARKBIT) |
108 | #define UNMARK_STRING(S) ((S)->size &= ~MARKBIT) | |
109 | #define STRING_MARKED_P(S) ((S)->size & MARKBIT) | |
2e471eb5 GM |
110 | |
111 | /* Value is the number of bytes/chars of S, a pointer to a struct | |
112 | Lisp_String. This must be used instead of STRING_BYTES (S) or | |
113 | S->size during GC, because S->size contains the mark bit for | |
114 | strings. */ | |
115 | ||
116 | #define GC_STRING_BYTES(S) (STRING_BYTES (S) & ~MARKBIT) | |
117 | #define GC_STRING_CHARS(S) ((S)->size & ~MARKBIT) | |
118 | ||
119 | /* Number of bytes of consing done since the last gc. */ | |
120 | ||
7146af97 JB |
121 | int consing_since_gc; |
122 | ||
310ea200 | 123 | /* Count the amount of consing of various sorts of space. */ |
2e471eb5 | 124 | |
31ade731 SM |
125 | EMACS_INT cons_cells_consed; |
126 | EMACS_INT floats_consed; | |
127 | EMACS_INT vector_cells_consed; | |
128 | EMACS_INT symbols_consed; | |
129 | EMACS_INT string_chars_consed; | |
130 | EMACS_INT misc_objects_consed; | |
131 | EMACS_INT intervals_consed; | |
132 | EMACS_INT strings_consed; | |
2e471eb5 GM |
133 | |
134 | /* Number of bytes of consing since GC before another GC should be done. */ | |
310ea200 | 135 | |
31ade731 | 136 | EMACS_INT gc_cons_threshold; |
7146af97 | 137 | |
2e471eb5 GM |
138 | /* Nonzero during GC. */ |
139 | ||
7146af97 JB |
140 | int gc_in_progress; |
141 | ||
299585ee | 142 | /* Nonzero means display messages at beginning and end of GC. */ |
2e471eb5 | 143 | |
299585ee RS |
144 | int garbage_collection_messages; |
145 | ||
7146af97 JB |
146 | #ifndef VIRT_ADDR_VARIES |
147 | extern | |
148 | #endif /* VIRT_ADDR_VARIES */ | |
2e471eb5 | 149 | int malloc_sbrk_used; |
7146af97 JB |
150 | |
151 | #ifndef VIRT_ADDR_VARIES | |
152 | extern | |
153 | #endif /* VIRT_ADDR_VARIES */ | |
2e471eb5 | 154 | int malloc_sbrk_unused; |
7146af97 | 155 | |
502b9b64 | 156 | /* Two limits controlling how much undo information to keep. */ |
2e471eb5 | 157 | |
31ade731 SM |
158 | EMACS_INT undo_limit; |
159 | EMACS_INT undo_strong_limit; | |
7146af97 | 160 | |
34400008 GM |
161 | /* Number of live and free conses etc. */ |
162 | ||
163 | static int total_conses, total_markers, total_symbols, total_vector_size; | |
164 | static int total_free_conses, total_free_markers, total_free_symbols; | |
165 | static int total_free_floats, total_floats; | |
fd27a537 | 166 | |
2e471eb5 GM |
167 | /* Points to memory space allocated as "spare", to be freed if we run |
168 | out of memory. */ | |
169 | ||
276cbe5a RS |
170 | static char *spare_memory; |
171 | ||
172 | /* Amount of spare memory to keep in reserve. */ | |
2e471eb5 | 173 | |
276cbe5a RS |
174 | #define SPARE_MEMORY (1 << 14) |
175 | ||
176 | /* Number of extra blocks malloc should get when it needs more core. */ | |
2e471eb5 | 177 | |
276cbe5a RS |
178 | static int malloc_hysteresis; |
179 | ||
2e471eb5 GM |
180 | /* Non-nil means defun should do purecopy on the function definition. */ |
181 | ||
7146af97 JB |
182 | Lisp_Object Vpurify_flag; |
183 | ||
184 | #ifndef HAVE_SHM | |
2e471eb5 GM |
185 | |
186 | /* Force it into data space! */ | |
187 | ||
188 | EMACS_INT pure[PURESIZE / sizeof (EMACS_INT)] = {0,}; | |
7146af97 | 189 | #define PUREBEG (char *) pure |
2e471eb5 | 190 | |
9e713715 | 191 | #else /* HAVE_SHM */ |
2e471eb5 | 192 | |
7146af97 JB |
193 | #define pure PURE_SEG_BITS /* Use shared memory segment */ |
194 | #define PUREBEG (char *)PURE_SEG_BITS | |
4c0be5f4 | 195 | |
9e713715 | 196 | #endif /* HAVE_SHM */ |
2e471eb5 | 197 | |
9e713715 | 198 | /* Pointer to the pure area, and its size. */ |
2e471eb5 | 199 | |
9e713715 GM |
200 | static char *purebeg; |
201 | static size_t pure_size; | |
202 | ||
203 | /* Number of bytes of pure storage used before pure storage overflowed. | |
204 | If this is non-zero, this implies that an overflow occurred. */ | |
205 | ||
206 | static size_t pure_bytes_used_before_overflow; | |
7146af97 | 207 | |
34400008 GM |
208 | /* Value is non-zero if P points into pure space. */ |
209 | ||
210 | #define PURE_POINTER_P(P) \ | |
211 | (((PNTR_COMPARISON_TYPE) (P) \ | |
9e713715 | 212 | < (PNTR_COMPARISON_TYPE) ((char *) purebeg + pure_size)) \ |
34400008 | 213 | && ((PNTR_COMPARISON_TYPE) (P) \ |
9e713715 | 214 | >= (PNTR_COMPARISON_TYPE) purebeg)) |
34400008 | 215 | |
2e471eb5 GM |
216 | /* Index in pure at which next pure object will be allocated.. */ |
217 | ||
31ade731 | 218 | EMACS_INT pure_bytes_used; |
7146af97 | 219 | |
2e471eb5 GM |
220 | /* If nonzero, this is a warning delivered by malloc and not yet |
221 | displayed. */ | |
222 | ||
7146af97 JB |
223 | char *pending_malloc_warning; |
224 | ||
bcb61d60 | 225 | /* Pre-computed signal argument for use when memory is exhausted. */ |
2e471eb5 | 226 | |
cf3540e4 | 227 | Lisp_Object memory_signal_data; |
bcb61d60 | 228 | |
7146af97 JB |
229 | /* Maximum amount of C stack to save when a GC happens. */ |
230 | ||
231 | #ifndef MAX_SAVE_STACK | |
232 | #define MAX_SAVE_STACK 16000 | |
233 | #endif | |
234 | ||
235 | /* Buffer in which we save a copy of the C stack at each GC. */ | |
236 | ||
237 | char *stack_copy; | |
238 | int stack_copy_size; | |
239 | ||
2e471eb5 GM |
240 | /* Non-zero means ignore malloc warnings. Set during initialization. |
241 | Currently not used. */ | |
242 | ||
7146af97 | 243 | int ignore_warnings; |
350273a4 | 244 | |
a59de17b | 245 | Lisp_Object Qgc_cons_threshold, Qchar_table_extra_slots; |
e8197642 | 246 | |
9e713715 GM |
247 | /* Hook run after GC has finished. */ |
248 | ||
249 | Lisp_Object Vpost_gc_hook, Qpost_gc_hook; | |
250 | ||
2e471eb5 GM |
251 | static void mark_buffer P_ ((Lisp_Object)); |
252 | static void mark_kboards P_ ((void)); | |
253 | static void gc_sweep P_ ((void)); | |
41c28a37 GM |
254 | static void mark_glyph_matrix P_ ((struct glyph_matrix *)); |
255 | static void mark_face_cache P_ ((struct face_cache *)); | |
256 | ||
257 | #ifdef HAVE_WINDOW_SYSTEM | |
258 | static void mark_image P_ ((struct image *)); | |
259 | static void mark_image_cache P_ ((struct frame *)); | |
260 | #endif /* HAVE_WINDOW_SYSTEM */ | |
261 | ||
2e471eb5 GM |
262 | static struct Lisp_String *allocate_string P_ ((void)); |
263 | static void compact_small_strings P_ ((void)); | |
264 | static void free_large_strings P_ ((void)); | |
265 | static void sweep_strings P_ ((void)); | |
7da0b0d3 RS |
266 | |
267 | extern int message_enable_multibyte; | |
34400008 | 268 | |
34400008 GM |
269 | /* When scanning the C stack for live Lisp objects, Emacs keeps track |
270 | of what memory allocated via lisp_malloc is intended for what | |
271 | purpose. This enumeration specifies the type of memory. */ | |
272 | ||
273 | enum mem_type | |
274 | { | |
275 | MEM_TYPE_NON_LISP, | |
276 | MEM_TYPE_BUFFER, | |
277 | MEM_TYPE_CONS, | |
278 | MEM_TYPE_STRING, | |
279 | MEM_TYPE_MISC, | |
280 | MEM_TYPE_SYMBOL, | |
281 | MEM_TYPE_FLOAT, | |
ece93c02 GM |
282 | /* Keep the following vector-like types together, with |
283 | MEM_TYPE_WINDOW being the last, and MEM_TYPE_VECTOR the | |
284 | first. Or change the code of live_vector_p, for instance. */ | |
285 | MEM_TYPE_VECTOR, | |
286 | MEM_TYPE_PROCESS, | |
287 | MEM_TYPE_HASH_TABLE, | |
288 | MEM_TYPE_FRAME, | |
289 | MEM_TYPE_WINDOW | |
34400008 GM |
290 | }; |
291 | ||
877935b1 | 292 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
0b378936 GM |
293 | |
294 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
295 | #include <stdio.h> /* For fprintf. */ | |
296 | #endif | |
297 | ||
298 | /* A unique object in pure space used to make some Lisp objects | |
299 | on free lists recognizable in O(1). */ | |
300 | ||
301 | Lisp_Object Vdead; | |
302 | ||
877935b1 GM |
303 | #ifdef GC_MALLOC_CHECK |
304 | ||
305 | enum mem_type allocated_mem_type; | |
306 | int dont_register_blocks; | |
307 | ||
308 | #endif /* GC_MALLOC_CHECK */ | |
309 | ||
310 | /* A node in the red-black tree describing allocated memory containing | |
311 | Lisp data. Each such block is recorded with its start and end | |
312 | address when it is allocated, and removed from the tree when it | |
313 | is freed. | |
314 | ||
315 | A red-black tree is a balanced binary tree with the following | |
316 | properties: | |
317 | ||
318 | 1. Every node is either red or black. | |
319 | 2. Every leaf is black. | |
320 | 3. If a node is red, then both of its children are black. | |
321 | 4. Every simple path from a node to a descendant leaf contains | |
322 | the same number of black nodes. | |
323 | 5. The root is always black. | |
324 | ||
325 | When nodes are inserted into the tree, or deleted from the tree, | |
326 | the tree is "fixed" so that these properties are always true. | |
327 | ||
328 | A red-black tree with N internal nodes has height at most 2 | |
329 | log(N+1). Searches, insertions and deletions are done in O(log N). | |
330 | Please see a text book about data structures for a detailed | |
331 | description of red-black trees. Any book worth its salt should | |
332 | describe them. */ | |
333 | ||
334 | struct mem_node | |
335 | { | |
336 | struct mem_node *left, *right, *parent; | |
337 | ||
338 | /* Start and end of allocated region. */ | |
339 | void *start, *end; | |
340 | ||
341 | /* Node color. */ | |
342 | enum {MEM_BLACK, MEM_RED} color; | |
343 | ||
344 | /* Memory type. */ | |
345 | enum mem_type type; | |
346 | }; | |
347 | ||
348 | /* Base address of stack. Set in main. */ | |
349 | ||
350 | Lisp_Object *stack_base; | |
351 | ||
352 | /* Root of the tree describing allocated Lisp memory. */ | |
353 | ||
354 | static struct mem_node *mem_root; | |
355 | ||
ece93c02 GM |
356 | /* Lowest and highest known address in the heap. */ |
357 | ||
358 | static void *min_heap_address, *max_heap_address; | |
359 | ||
877935b1 GM |
360 | /* Sentinel node of the tree. */ |
361 | ||
362 | static struct mem_node mem_z; | |
363 | #define MEM_NIL &mem_z | |
364 | ||
b3303f74 | 365 | static POINTER_TYPE *lisp_malloc P_ ((size_t, enum mem_type)); |
ece93c02 | 366 | static struct Lisp_Vector *allocate_vectorlike P_ ((EMACS_INT, enum mem_type)); |
bf952fb6 | 367 | static void lisp_free P_ ((POINTER_TYPE *)); |
34400008 | 368 | static void mark_stack P_ ((void)); |
34400008 GM |
369 | static int live_vector_p P_ ((struct mem_node *, void *)); |
370 | static int live_buffer_p P_ ((struct mem_node *, void *)); | |
371 | static int live_string_p P_ ((struct mem_node *, void *)); | |
372 | static int live_cons_p P_ ((struct mem_node *, void *)); | |
373 | static int live_symbol_p P_ ((struct mem_node *, void *)); | |
374 | static int live_float_p P_ ((struct mem_node *, void *)); | |
375 | static int live_misc_p P_ ((struct mem_node *, void *)); | |
182ff242 | 376 | static void mark_maybe_object P_ ((Lisp_Object)); |
34400008 GM |
377 | static void mark_memory P_ ((void *, void *)); |
378 | static void mem_init P_ ((void)); | |
379 | static struct mem_node *mem_insert P_ ((void *, void *, enum mem_type)); | |
380 | static void mem_insert_fixup P_ ((struct mem_node *)); | |
381 | static void mem_rotate_left P_ ((struct mem_node *)); | |
382 | static void mem_rotate_right P_ ((struct mem_node *)); | |
383 | static void mem_delete P_ ((struct mem_node *)); | |
384 | static void mem_delete_fixup P_ ((struct mem_node *)); | |
385 | static INLINE struct mem_node *mem_find P_ ((void *)); | |
386 | ||
387 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
388 | static void check_gcpros P_ ((void)); | |
389 | #endif | |
390 | ||
877935b1 | 391 | #endif /* GC_MARK_STACK || GC_MALLOC_CHECK */ |
34400008 | 392 | |
1f0b3fd2 GM |
393 | /* Recording what needs to be marked for gc. */ |
394 | ||
395 | struct gcpro *gcprolist; | |
396 | ||
397 | /* Addresses of staticpro'd variables. */ | |
398 | ||
382d38fa | 399 | #define NSTATICS 1280 |
1f0b3fd2 GM |
400 | Lisp_Object *staticvec[NSTATICS] = {0}; |
401 | ||
402 | /* Index of next unused slot in staticvec. */ | |
403 | ||
404 | int staticidx = 0; | |
405 | ||
406 | static POINTER_TYPE *pure_alloc P_ ((size_t, int)); | |
407 | ||
408 | ||
409 | /* Value is SZ rounded up to the next multiple of ALIGNMENT. | |
410 | ALIGNMENT must be a power of 2. */ | |
411 | ||
412 | #define ALIGN(SZ, ALIGNMENT) \ | |
413 | (((SZ) + (ALIGNMENT) - 1) & ~((ALIGNMENT) - 1)) | |
414 | ||
ece93c02 | 415 | |
7146af97 | 416 | \f |
34400008 GM |
417 | /************************************************************************ |
418 | Malloc | |
419 | ************************************************************************/ | |
420 | ||
421 | /* Write STR to Vstandard_output plus some advice on how to free some | |
422 | memory. Called when memory gets low. */ | |
1a4f1e2c | 423 | |
7146af97 JB |
424 | Lisp_Object |
425 | malloc_warning_1 (str) | |
426 | Lisp_Object str; | |
427 | { | |
428 | Fprinc (str, Vstandard_output); | |
429 | write_string ("\nKilling some buffers may delay running out of memory.\n", -1); | |
430 | write_string ("However, certainly by the time you receive the 95% warning,\n", -1); | |
431 | write_string ("you should clean up, kill this Emacs, and start a new one.", -1); | |
432 | return Qnil; | |
433 | } | |
434 | ||
34400008 GM |
435 | |
436 | /* Function malloc calls this if it finds we are near exhausting | |
437 | storage. */ | |
d457598b AS |
438 | |
439 | void | |
7146af97 JB |
440 | malloc_warning (str) |
441 | char *str; | |
442 | { | |
443 | pending_malloc_warning = str; | |
444 | } | |
445 | ||
34400008 GM |
446 | |
447 | /* Display a malloc warning in buffer *Danger*. */ | |
448 | ||
d457598b | 449 | void |
7146af97 JB |
450 | display_malloc_warning () |
451 | { | |
452 | register Lisp_Object val; | |
453 | ||
454 | val = build_string (pending_malloc_warning); | |
455 | pending_malloc_warning = 0; | |
456 | internal_with_output_to_temp_buffer (" *Danger*", malloc_warning_1, val); | |
457 | } | |
458 | ||
34400008 | 459 | |
d1658221 | 460 | #ifdef DOUG_LEA_MALLOC |
1177ecf6 | 461 | # define BYTES_USED (mallinfo ().arena) |
d1658221 | 462 | #else |
1177ecf6 | 463 | # define BYTES_USED _bytes_used |
d1658221 RS |
464 | #endif |
465 | ||
34400008 | 466 | |
2e471eb5 | 467 | /* Called if malloc returns zero. */ |
276cbe5a | 468 | |
d457598b | 469 | void |
7146af97 JB |
470 | memory_full () |
471 | { | |
276cbe5a | 472 | #ifndef SYSTEM_MALLOC |
d1658221 | 473 | bytes_used_when_full = BYTES_USED; |
276cbe5a RS |
474 | #endif |
475 | ||
476 | /* The first time we get here, free the spare memory. */ | |
477 | if (spare_memory) | |
478 | { | |
479 | free (spare_memory); | |
480 | spare_memory = 0; | |
481 | } | |
482 | ||
2e471eb5 GM |
483 | /* This used to call error, but if we've run out of memory, we could |
484 | get infinite recursion trying to build the string. */ | |
276cbe5a | 485 | while (1) |
74d84334 | 486 | Fsignal (Qnil, memory_signal_data); |
276cbe5a RS |
487 | } |
488 | ||
34400008 | 489 | |
276cbe5a RS |
490 | /* Called if we can't allocate relocatable space for a buffer. */ |
491 | ||
492 | void | |
493 | buffer_memory_full () | |
494 | { | |
2e471eb5 GM |
495 | /* If buffers use the relocating allocator, no need to free |
496 | spare_memory, because we may have plenty of malloc space left | |
497 | that we could get, and if we don't, the malloc that fails will | |
498 | itself cause spare_memory to be freed. If buffers don't use the | |
499 | relocating allocator, treat this like any other failing | |
500 | malloc. */ | |
276cbe5a RS |
501 | |
502 | #ifndef REL_ALLOC | |
503 | memory_full (); | |
504 | #endif | |
505 | ||
2e471eb5 GM |
506 | /* This used to call error, but if we've run out of memory, we could |
507 | get infinite recursion trying to build the string. */ | |
bcb61d60 KH |
508 | while (1) |
509 | Fsignal (Qerror, memory_signal_data); | |
7146af97 JB |
510 | } |
511 | ||
34400008 GM |
512 | |
513 | /* Like malloc but check for no memory and block interrupt input.. */ | |
7146af97 | 514 | |
c971ff9a | 515 | POINTER_TYPE * |
7146af97 | 516 | xmalloc (size) |
675d5130 | 517 | size_t size; |
7146af97 | 518 | { |
c971ff9a | 519 | register POINTER_TYPE *val; |
7146af97 | 520 | |
9ac0d9e0 | 521 | BLOCK_INPUT; |
c971ff9a | 522 | val = (POINTER_TYPE *) malloc (size); |
9ac0d9e0 | 523 | UNBLOCK_INPUT; |
7146af97 | 524 | |
2e471eb5 GM |
525 | if (!val && size) |
526 | memory_full (); | |
7146af97 JB |
527 | return val; |
528 | } | |
529 | ||
34400008 GM |
530 | |
531 | /* Like realloc but check for no memory and block interrupt input.. */ | |
532 | ||
c971ff9a | 533 | POINTER_TYPE * |
7146af97 | 534 | xrealloc (block, size) |
c971ff9a | 535 | POINTER_TYPE *block; |
675d5130 | 536 | size_t size; |
7146af97 | 537 | { |
c971ff9a | 538 | register POINTER_TYPE *val; |
7146af97 | 539 | |
9ac0d9e0 | 540 | BLOCK_INPUT; |
56d2031b JB |
541 | /* We must call malloc explicitly when BLOCK is 0, since some |
542 | reallocs don't do this. */ | |
543 | if (! block) | |
c971ff9a | 544 | val = (POINTER_TYPE *) malloc (size); |
f048679d | 545 | else |
c971ff9a | 546 | val = (POINTER_TYPE *) realloc (block, size); |
9ac0d9e0 | 547 | UNBLOCK_INPUT; |
7146af97 JB |
548 | |
549 | if (!val && size) memory_full (); | |
550 | return val; | |
551 | } | |
9ac0d9e0 | 552 | |
34400008 GM |
553 | |
554 | /* Like free but block interrupt input.. */ | |
555 | ||
9ac0d9e0 JB |
556 | void |
557 | xfree (block) | |
c971ff9a | 558 | POINTER_TYPE *block; |
9ac0d9e0 JB |
559 | { |
560 | BLOCK_INPUT; | |
561 | free (block); | |
562 | UNBLOCK_INPUT; | |
563 | } | |
564 | ||
c8099634 | 565 | |
dca7c6a8 GM |
566 | /* Like strdup, but uses xmalloc. */ |
567 | ||
568 | char * | |
569 | xstrdup (s) | |
570 | char *s; | |
571 | { | |
675d5130 | 572 | size_t len = strlen (s) + 1; |
dca7c6a8 GM |
573 | char *p = (char *) xmalloc (len); |
574 | bcopy (s, p, len); | |
575 | return p; | |
576 | } | |
577 | ||
578 | ||
34400008 GM |
579 | /* Like malloc but used for allocating Lisp data. NBYTES is the |
580 | number of bytes to allocate, TYPE describes the intended use of the | |
581 | allcated memory block (for strings, for conses, ...). */ | |
582 | ||
675d5130 | 583 | static POINTER_TYPE * |
34400008 | 584 | lisp_malloc (nbytes, type) |
675d5130 | 585 | size_t nbytes; |
34400008 | 586 | enum mem_type type; |
c8099634 | 587 | { |
34400008 | 588 | register void *val; |
c8099634 RS |
589 | |
590 | BLOCK_INPUT; | |
877935b1 GM |
591 | |
592 | #ifdef GC_MALLOC_CHECK | |
593 | allocated_mem_type = type; | |
594 | #endif | |
595 | ||
34400008 | 596 | val = (void *) malloc (nbytes); |
c8099634 | 597 | |
877935b1 | 598 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
dca7c6a8 | 599 | if (val && type != MEM_TYPE_NON_LISP) |
34400008 GM |
600 | mem_insert (val, (char *) val + nbytes, type); |
601 | #endif | |
877935b1 | 602 | |
dca7c6a8 GM |
603 | UNBLOCK_INPUT; |
604 | if (!val && nbytes) | |
605 | memory_full (); | |
c8099634 RS |
606 | return val; |
607 | } | |
608 | ||
34400008 GM |
609 | |
610 | /* Return a new buffer structure allocated from the heap with | |
611 | a call to lisp_malloc. */ | |
612 | ||
613 | struct buffer * | |
614 | allocate_buffer () | |
615 | { | |
11d81650 GM |
616 | struct buffer *b |
617 | = (struct buffer *) lisp_malloc (sizeof (struct buffer), | |
618 | MEM_TYPE_BUFFER); | |
619 | VALIDATE_LISP_STORAGE (b, sizeof *b); | |
620 | return b; | |
34400008 GM |
621 | } |
622 | ||
623 | ||
624 | /* Free BLOCK. This must be called to free memory allocated with a | |
625 | call to lisp_malloc. */ | |
626 | ||
bf952fb6 | 627 | static void |
c8099634 | 628 | lisp_free (block) |
675d5130 | 629 | POINTER_TYPE *block; |
c8099634 RS |
630 | { |
631 | BLOCK_INPUT; | |
c8099634 | 632 | free (block); |
877935b1 | 633 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
34400008 GM |
634 | mem_delete (mem_find (block)); |
635 | #endif | |
c8099634 RS |
636 | UNBLOCK_INPUT; |
637 | } | |
34400008 | 638 | |
9ac0d9e0 JB |
639 | \f |
640 | /* Arranging to disable input signals while we're in malloc. | |
641 | ||
642 | This only works with GNU malloc. To help out systems which can't | |
643 | use GNU malloc, all the calls to malloc, realloc, and free | |
644 | elsewhere in the code should be inside a BLOCK_INPUT/UNBLOCK_INPUT | |
645 | pairs; unfortunately, we have no idea what C library functions | |
646 | might call malloc, so we can't really protect them unless you're | |
647 | using GNU malloc. Fortunately, most of the major operating can use | |
648 | GNU malloc. */ | |
649 | ||
650 | #ifndef SYSTEM_MALLOC | |
b3303f74 DL |
651 | #ifndef DOUG_LEA_MALLOC |
652 | extern void * (*__malloc_hook) P_ ((size_t)); | |
653 | extern void * (*__realloc_hook) P_ ((void *, size_t)); | |
654 | extern void (*__free_hook) P_ ((void *)); | |
655 | /* Else declared in malloc.h, perhaps with an extra arg. */ | |
656 | #endif /* DOUG_LEA_MALLOC */ | |
b0846f52 | 657 | static void * (*old_malloc_hook) (); |
b0846f52 | 658 | static void * (*old_realloc_hook) (); |
b0846f52 | 659 | static void (*old_free_hook) (); |
9ac0d9e0 | 660 | |
276cbe5a RS |
661 | /* This function is used as the hook for free to call. */ |
662 | ||
9ac0d9e0 JB |
663 | static void |
664 | emacs_blocked_free (ptr) | |
665 | void *ptr; | |
666 | { | |
667 | BLOCK_INPUT; | |
877935b1 GM |
668 | |
669 | #ifdef GC_MALLOC_CHECK | |
a83fee2c GM |
670 | if (ptr) |
671 | { | |
672 | struct mem_node *m; | |
877935b1 | 673 | |
a83fee2c GM |
674 | m = mem_find (ptr); |
675 | if (m == MEM_NIL || m->start != ptr) | |
676 | { | |
677 | fprintf (stderr, | |
678 | "Freeing `%p' which wasn't allocated with malloc\n", ptr); | |
679 | abort (); | |
680 | } | |
681 | else | |
682 | { | |
683 | /* fprintf (stderr, "free %p...%p (%p)\n", m->start, m->end, ptr); */ | |
684 | mem_delete (m); | |
685 | } | |
686 | } | |
877935b1 GM |
687 | #endif /* GC_MALLOC_CHECK */ |
688 | ||
9ac0d9e0 JB |
689 | __free_hook = old_free_hook; |
690 | free (ptr); | |
877935b1 | 691 | |
276cbe5a RS |
692 | /* If we released our reserve (due to running out of memory), |
693 | and we have a fair amount free once again, | |
694 | try to set aside another reserve in case we run out once more. */ | |
695 | if (spare_memory == 0 | |
696 | /* Verify there is enough space that even with the malloc | |
697 | hysteresis this call won't run out again. | |
698 | The code here is correct as long as SPARE_MEMORY | |
699 | is substantially larger than the block size malloc uses. */ | |
700 | && (bytes_used_when_full | |
d1658221 | 701 | > BYTES_USED + max (malloc_hysteresis, 4) * SPARE_MEMORY)) |
675d5130 | 702 | spare_memory = (char *) malloc ((size_t) SPARE_MEMORY); |
276cbe5a | 703 | |
b0846f52 | 704 | __free_hook = emacs_blocked_free; |
9ac0d9e0 JB |
705 | UNBLOCK_INPUT; |
706 | } | |
707 | ||
34400008 | 708 | |
276cbe5a RS |
709 | /* If we released our reserve (due to running out of memory), |
710 | and we have a fair amount free once again, | |
711 | try to set aside another reserve in case we run out once more. | |
712 | ||
713 | This is called when a relocatable block is freed in ralloc.c. */ | |
714 | ||
715 | void | |
716 | refill_memory_reserve () | |
717 | { | |
718 | if (spare_memory == 0) | |
675d5130 | 719 | spare_memory = (char *) malloc ((size_t) SPARE_MEMORY); |
276cbe5a RS |
720 | } |
721 | ||
34400008 | 722 | |
276cbe5a RS |
723 | /* This function is the malloc hook that Emacs uses. */ |
724 | ||
9ac0d9e0 JB |
725 | static void * |
726 | emacs_blocked_malloc (size) | |
675d5130 | 727 | size_t size; |
9ac0d9e0 JB |
728 | { |
729 | void *value; | |
730 | ||
731 | BLOCK_INPUT; | |
732 | __malloc_hook = old_malloc_hook; | |
1177ecf6 | 733 | #ifdef DOUG_LEA_MALLOC |
d1658221 | 734 | mallopt (M_TOP_PAD, malloc_hysteresis * 4096); |
1177ecf6 | 735 | #else |
d1658221 | 736 | __malloc_extra_blocks = malloc_hysteresis; |
1177ecf6 | 737 | #endif |
877935b1 | 738 | |
2756d8ee | 739 | value = (void *) malloc (size); |
877935b1 GM |
740 | |
741 | #ifdef GC_MALLOC_CHECK | |
742 | { | |
743 | struct mem_node *m = mem_find (value); | |
744 | if (m != MEM_NIL) | |
745 | { | |
746 | fprintf (stderr, "Malloc returned %p which is already in use\n", | |
747 | value); | |
748 | fprintf (stderr, "Region in use is %p...%p, %u bytes, type %d\n", | |
749 | m->start, m->end, (char *) m->end - (char *) m->start, | |
750 | m->type); | |
751 | abort (); | |
752 | } | |
753 | ||
754 | if (!dont_register_blocks) | |
755 | { | |
756 | mem_insert (value, (char *) value + max (1, size), allocated_mem_type); | |
757 | allocated_mem_type = MEM_TYPE_NON_LISP; | |
758 | } | |
759 | } | |
760 | #endif /* GC_MALLOC_CHECK */ | |
761 | ||
b0846f52 | 762 | __malloc_hook = emacs_blocked_malloc; |
9ac0d9e0 JB |
763 | UNBLOCK_INPUT; |
764 | ||
877935b1 | 765 | /* fprintf (stderr, "%p malloc\n", value); */ |
9ac0d9e0 JB |
766 | return value; |
767 | } | |
768 | ||
34400008 GM |
769 | |
770 | /* This function is the realloc hook that Emacs uses. */ | |
771 | ||
9ac0d9e0 JB |
772 | static void * |
773 | emacs_blocked_realloc (ptr, size) | |
774 | void *ptr; | |
675d5130 | 775 | size_t size; |
9ac0d9e0 JB |
776 | { |
777 | void *value; | |
778 | ||
779 | BLOCK_INPUT; | |
780 | __realloc_hook = old_realloc_hook; | |
877935b1 GM |
781 | |
782 | #ifdef GC_MALLOC_CHECK | |
783 | if (ptr) | |
784 | { | |
785 | struct mem_node *m = mem_find (ptr); | |
786 | if (m == MEM_NIL || m->start != ptr) | |
787 | { | |
788 | fprintf (stderr, | |
789 | "Realloc of %p which wasn't allocated with malloc\n", | |
790 | ptr); | |
791 | abort (); | |
792 | } | |
793 | ||
794 | mem_delete (m); | |
795 | } | |
796 | ||
797 | /* fprintf (stderr, "%p -> realloc\n", ptr); */ | |
798 | ||
799 | /* Prevent malloc from registering blocks. */ | |
800 | dont_register_blocks = 1; | |
801 | #endif /* GC_MALLOC_CHECK */ | |
802 | ||
2756d8ee | 803 | value = (void *) realloc (ptr, size); |
877935b1 GM |
804 | |
805 | #ifdef GC_MALLOC_CHECK | |
806 | dont_register_blocks = 0; | |
807 | ||
808 | { | |
809 | struct mem_node *m = mem_find (value); | |
810 | if (m != MEM_NIL) | |
811 | { | |
812 | fprintf (stderr, "Realloc returns memory that is already in use\n"); | |
813 | abort (); | |
814 | } | |
815 | ||
816 | /* Can't handle zero size regions in the red-black tree. */ | |
817 | mem_insert (value, (char *) value + max (size, 1), MEM_TYPE_NON_LISP); | |
818 | } | |
819 | ||
820 | /* fprintf (stderr, "%p <- realloc\n", value); */ | |
821 | #endif /* GC_MALLOC_CHECK */ | |
822 | ||
b0846f52 | 823 | __realloc_hook = emacs_blocked_realloc; |
9ac0d9e0 JB |
824 | UNBLOCK_INPUT; |
825 | ||
826 | return value; | |
827 | } | |
828 | ||
34400008 GM |
829 | |
830 | /* Called from main to set up malloc to use our hooks. */ | |
831 | ||
9ac0d9e0 JB |
832 | void |
833 | uninterrupt_malloc () | |
834 | { | |
c8099634 RS |
835 | if (__free_hook != emacs_blocked_free) |
836 | old_free_hook = __free_hook; | |
b0846f52 | 837 | __free_hook = emacs_blocked_free; |
9ac0d9e0 | 838 | |
c8099634 RS |
839 | if (__malloc_hook != emacs_blocked_malloc) |
840 | old_malloc_hook = __malloc_hook; | |
b0846f52 | 841 | __malloc_hook = emacs_blocked_malloc; |
9ac0d9e0 | 842 | |
c8099634 RS |
843 | if (__realloc_hook != emacs_blocked_realloc) |
844 | old_realloc_hook = __realloc_hook; | |
b0846f52 | 845 | __realloc_hook = emacs_blocked_realloc; |
9ac0d9e0 | 846 | } |
2e471eb5 GM |
847 | |
848 | #endif /* not SYSTEM_MALLOC */ | |
849 | ||
850 | ||
7146af97 | 851 | \f |
2e471eb5 GM |
852 | /*********************************************************************** |
853 | Interval Allocation | |
854 | ***********************************************************************/ | |
1a4f1e2c | 855 | |
34400008 GM |
856 | /* Number of intervals allocated in an interval_block structure. |
857 | The 1020 is 1024 minus malloc overhead. */ | |
858 | ||
d5e35230 JA |
859 | #define INTERVAL_BLOCK_SIZE \ |
860 | ((1020 - sizeof (struct interval_block *)) / sizeof (struct interval)) | |
861 | ||
34400008 GM |
862 | /* Intervals are allocated in chunks in form of an interval_block |
863 | structure. */ | |
864 | ||
d5e35230 | 865 | struct interval_block |
2e471eb5 GM |
866 | { |
867 | struct interval_block *next; | |
868 | struct interval intervals[INTERVAL_BLOCK_SIZE]; | |
869 | }; | |
d5e35230 | 870 | |
34400008 GM |
871 | /* Current interval block. Its `next' pointer points to older |
872 | blocks. */ | |
873 | ||
d5e35230 | 874 | struct interval_block *interval_block; |
34400008 GM |
875 | |
876 | /* Index in interval_block above of the next unused interval | |
877 | structure. */ | |
878 | ||
d5e35230 | 879 | static int interval_block_index; |
34400008 GM |
880 | |
881 | /* Number of free and live intervals. */ | |
882 | ||
2e471eb5 | 883 | static int total_free_intervals, total_intervals; |
d5e35230 | 884 | |
34400008 GM |
885 | /* List of free intervals. */ |
886 | ||
d5e35230 JA |
887 | INTERVAL interval_free_list; |
888 | ||
c8099634 | 889 | /* Total number of interval blocks now in use. */ |
2e471eb5 | 890 | |
c8099634 RS |
891 | int n_interval_blocks; |
892 | ||
34400008 GM |
893 | |
894 | /* Initialize interval allocation. */ | |
895 | ||
d5e35230 JA |
896 | static void |
897 | init_intervals () | |
898 | { | |
899 | interval_block | |
34400008 GM |
900 | = (struct interval_block *) lisp_malloc (sizeof *interval_block, |
901 | MEM_TYPE_NON_LISP); | |
d5e35230 | 902 | interval_block->next = 0; |
290c8f1e | 903 | bzero ((char *) interval_block->intervals, sizeof interval_block->intervals); |
d5e35230 JA |
904 | interval_block_index = 0; |
905 | interval_free_list = 0; | |
c8099634 | 906 | n_interval_blocks = 1; |
d5e35230 JA |
907 | } |
908 | ||
34400008 GM |
909 | |
910 | /* Return a new interval. */ | |
d5e35230 JA |
911 | |
912 | INTERVAL | |
913 | make_interval () | |
914 | { | |
915 | INTERVAL val; | |
916 | ||
917 | if (interval_free_list) | |
918 | { | |
919 | val = interval_free_list; | |
439d5cb4 | 920 | interval_free_list = INTERVAL_PARENT (interval_free_list); |
d5e35230 JA |
921 | } |
922 | else | |
923 | { | |
924 | if (interval_block_index == INTERVAL_BLOCK_SIZE) | |
925 | { | |
3c06d205 KH |
926 | register struct interval_block *newi; |
927 | ||
34400008 GM |
928 | newi = (struct interval_block *) lisp_malloc (sizeof *newi, |
929 | MEM_TYPE_NON_LISP); | |
d5e35230 JA |
930 | |
931 | VALIDATE_LISP_STORAGE (newi, sizeof *newi); | |
932 | newi->next = interval_block; | |
933 | interval_block = newi; | |
934 | interval_block_index = 0; | |
c8099634 | 935 | n_interval_blocks++; |
d5e35230 JA |
936 | } |
937 | val = &interval_block->intervals[interval_block_index++]; | |
938 | } | |
939 | consing_since_gc += sizeof (struct interval); | |
310ea200 | 940 | intervals_consed++; |
d5e35230 JA |
941 | RESET_INTERVAL (val); |
942 | return val; | |
943 | } | |
944 | ||
34400008 GM |
945 | |
946 | /* Mark Lisp objects in interval I. */ | |
d5e35230 JA |
947 | |
948 | static void | |
d393c068 | 949 | mark_interval (i, dummy) |
d5e35230 | 950 | register INTERVAL i; |
d393c068 | 951 | Lisp_Object dummy; |
d5e35230 JA |
952 | { |
953 | if (XMARKBIT (i->plist)) | |
954 | abort (); | |
955 | mark_object (&i->plist); | |
956 | XMARK (i->plist); | |
957 | } | |
958 | ||
34400008 GM |
959 | |
960 | /* Mark the interval tree rooted in TREE. Don't call this directly; | |
961 | use the macro MARK_INTERVAL_TREE instead. */ | |
962 | ||
d5e35230 JA |
963 | static void |
964 | mark_interval_tree (tree) | |
965 | register INTERVAL tree; | |
966 | { | |
e8720644 JB |
967 | /* No need to test if this tree has been marked already; this |
968 | function is always called through the MARK_INTERVAL_TREE macro, | |
969 | which takes care of that. */ | |
970 | ||
971 | /* XMARK expands to an assignment; the LHS of an assignment can't be | |
972 | a cast. */ | |
e0b8c689 | 973 | XMARK (tree->up.obj); |
d5e35230 | 974 | |
1e934989 | 975 | traverse_intervals_noorder (tree, mark_interval, Qnil); |
d5e35230 JA |
976 | } |
977 | ||
34400008 GM |
978 | |
979 | /* Mark the interval tree rooted in I. */ | |
980 | ||
e8720644 JB |
981 | #define MARK_INTERVAL_TREE(i) \ |
982 | do { \ | |
983 | if (!NULL_INTERVAL_P (i) \ | |
e0b8c689 | 984 | && ! XMARKBIT (i->up.obj)) \ |
e8720644 JB |
985 | mark_interval_tree (i); \ |
986 | } while (0) | |
d5e35230 | 987 | |
34400008 | 988 | |
1a4f1e2c | 989 | /* The oddity in the call to XUNMARK is necessary because XUNMARK |
2e471eb5 GM |
990 | expands to an assignment to its argument, and most C compilers |
991 | don't support casts on the left operand of `='. */ | |
992 | ||
993 | #define UNMARK_BALANCE_INTERVALS(i) \ | |
994 | do { \ | |
995 | if (! NULL_INTERVAL_P (i)) \ | |
996 | { \ | |
e0b8c689 | 997 | XUNMARK ((i)->up.obj); \ |
2e471eb5 GM |
998 | (i) = balance_intervals (i); \ |
999 | } \ | |
1000 | } while (0) | |
d5e35230 | 1001 | |
cc2d8c6b KR |
1002 | \f |
1003 | /* Number support. If NO_UNION_TYPE isn't in effect, we | |
1004 | can't create number objects in macros. */ | |
1005 | #ifndef make_number | |
1006 | Lisp_Object | |
1007 | make_number (n) | |
1008 | int n; | |
1009 | { | |
1010 | Lisp_Object obj; | |
1011 | obj.s.val = n; | |
1012 | obj.s.type = Lisp_Int; | |
1013 | return obj; | |
1014 | } | |
1015 | #endif | |
d5e35230 | 1016 | \f |
2e471eb5 GM |
1017 | /*********************************************************************** |
1018 | String Allocation | |
1019 | ***********************************************************************/ | |
1a4f1e2c | 1020 | |
2e471eb5 GM |
1021 | /* Lisp_Strings are allocated in string_block structures. When a new |
1022 | string_block is allocated, all the Lisp_Strings it contains are | |
e0fead5d | 1023 | added to a free-list string_free_list. When a new Lisp_String is |
2e471eb5 GM |
1024 | needed, it is taken from that list. During the sweep phase of GC, |
1025 | string_blocks that are entirely free are freed, except two which | |
1026 | we keep. | |
7146af97 | 1027 | |
2e471eb5 GM |
1028 | String data is allocated from sblock structures. Strings larger |
1029 | than LARGE_STRING_BYTES, get their own sblock, data for smaller | |
1030 | strings is sub-allocated out of sblocks of size SBLOCK_SIZE. | |
7146af97 | 1031 | |
2e471eb5 GM |
1032 | Sblocks consist internally of sdata structures, one for each |
1033 | Lisp_String. The sdata structure points to the Lisp_String it | |
1034 | belongs to. The Lisp_String points back to the `u.data' member of | |
1035 | its sdata structure. | |
7146af97 | 1036 | |
2e471eb5 GM |
1037 | When a Lisp_String is freed during GC, it is put back on |
1038 | string_free_list, and its `data' member and its sdata's `string' | |
1039 | pointer is set to null. The size of the string is recorded in the | |
1040 | `u.nbytes' member of the sdata. So, sdata structures that are no | |
1041 | longer used, can be easily recognized, and it's easy to compact the | |
1042 | sblocks of small strings which we do in compact_small_strings. */ | |
7146af97 | 1043 | |
2e471eb5 GM |
1044 | /* Size in bytes of an sblock structure used for small strings. This |
1045 | is 8192 minus malloc overhead. */ | |
7146af97 | 1046 | |
2e471eb5 | 1047 | #define SBLOCK_SIZE 8188 |
c8099634 | 1048 | |
2e471eb5 GM |
1049 | /* Strings larger than this are considered large strings. String data |
1050 | for large strings is allocated from individual sblocks. */ | |
7146af97 | 1051 | |
2e471eb5 GM |
1052 | #define LARGE_STRING_BYTES 1024 |
1053 | ||
1054 | /* Structure describing string memory sub-allocated from an sblock. | |
1055 | This is where the contents of Lisp strings are stored. */ | |
1056 | ||
1057 | struct sdata | |
7146af97 | 1058 | { |
2e471eb5 GM |
1059 | /* Back-pointer to the string this sdata belongs to. If null, this |
1060 | structure is free, and the NBYTES member of the union below | |
34400008 | 1061 | contains the string's byte size (the same value that STRING_BYTES |
2e471eb5 GM |
1062 | would return if STRING were non-null). If non-null, STRING_BYTES |
1063 | (STRING) is the size of the data, and DATA contains the string's | |
1064 | contents. */ | |
1065 | struct Lisp_String *string; | |
7146af97 | 1066 | |
31d929e5 GM |
1067 | #ifdef GC_CHECK_STRING_BYTES |
1068 | ||
1069 | EMACS_INT nbytes; | |
1070 | unsigned char data[1]; | |
1071 | ||
1072 | #define SDATA_NBYTES(S) (S)->nbytes | |
1073 | #define SDATA_DATA(S) (S)->data | |
1074 | ||
1075 | #else /* not GC_CHECK_STRING_BYTES */ | |
1076 | ||
2e471eb5 GM |
1077 | union |
1078 | { | |
1079 | /* When STRING in non-null. */ | |
1080 | unsigned char data[1]; | |
1081 | ||
1082 | /* When STRING is null. */ | |
1083 | EMACS_INT nbytes; | |
1084 | } u; | |
31d929e5 GM |
1085 | |
1086 | ||
1087 | #define SDATA_NBYTES(S) (S)->u.nbytes | |
1088 | #define SDATA_DATA(S) (S)->u.data | |
1089 | ||
1090 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 GM |
1091 | }; |
1092 | ||
31d929e5 | 1093 | |
2e471eb5 GM |
1094 | /* Structure describing a block of memory which is sub-allocated to |
1095 | obtain string data memory for strings. Blocks for small strings | |
1096 | are of fixed size SBLOCK_SIZE. Blocks for large strings are made | |
1097 | as large as needed. */ | |
1098 | ||
1099 | struct sblock | |
7146af97 | 1100 | { |
2e471eb5 GM |
1101 | /* Next in list. */ |
1102 | struct sblock *next; | |
7146af97 | 1103 | |
2e471eb5 GM |
1104 | /* Pointer to the next free sdata block. This points past the end |
1105 | of the sblock if there isn't any space left in this block. */ | |
1106 | struct sdata *next_free; | |
1107 | ||
1108 | /* Start of data. */ | |
1109 | struct sdata first_data; | |
1110 | }; | |
1111 | ||
1112 | /* Number of Lisp strings in a string_block structure. The 1020 is | |
1113 | 1024 minus malloc overhead. */ | |
1114 | ||
1115 | #define STRINGS_IN_STRING_BLOCK \ | |
1116 | ((1020 - sizeof (struct string_block *)) / sizeof (struct Lisp_String)) | |
1117 | ||
1118 | /* Structure describing a block from which Lisp_String structures | |
1119 | are allocated. */ | |
1120 | ||
1121 | struct string_block | |
7146af97 | 1122 | { |
2e471eb5 GM |
1123 | struct string_block *next; |
1124 | struct Lisp_String strings[STRINGS_IN_STRING_BLOCK]; | |
1125 | }; | |
7146af97 | 1126 | |
2e471eb5 GM |
1127 | /* Head and tail of the list of sblock structures holding Lisp string |
1128 | data. We always allocate from current_sblock. The NEXT pointers | |
1129 | in the sblock structures go from oldest_sblock to current_sblock. */ | |
3c06d205 | 1130 | |
2e471eb5 | 1131 | static struct sblock *oldest_sblock, *current_sblock; |
7146af97 | 1132 | |
2e471eb5 | 1133 | /* List of sblocks for large strings. */ |
7146af97 | 1134 | |
2e471eb5 | 1135 | static struct sblock *large_sblocks; |
7146af97 | 1136 | |
2e471eb5 | 1137 | /* List of string_block structures, and how many there are. */ |
7146af97 | 1138 | |
2e471eb5 GM |
1139 | static struct string_block *string_blocks; |
1140 | static int n_string_blocks; | |
7146af97 | 1141 | |
2e471eb5 | 1142 | /* Free-list of Lisp_Strings. */ |
7146af97 | 1143 | |
2e471eb5 | 1144 | static struct Lisp_String *string_free_list; |
7146af97 | 1145 | |
2e471eb5 | 1146 | /* Number of live and free Lisp_Strings. */ |
c8099634 | 1147 | |
2e471eb5 | 1148 | static int total_strings, total_free_strings; |
7146af97 | 1149 | |
2e471eb5 GM |
1150 | /* Number of bytes used by live strings. */ |
1151 | ||
1152 | static int total_string_size; | |
1153 | ||
1154 | /* Given a pointer to a Lisp_String S which is on the free-list | |
1155 | string_free_list, return a pointer to its successor in the | |
1156 | free-list. */ | |
1157 | ||
1158 | #define NEXT_FREE_LISP_STRING(S) (*(struct Lisp_String **) (S)) | |
1159 | ||
1160 | /* Return a pointer to the sdata structure belonging to Lisp string S. | |
1161 | S must be live, i.e. S->data must not be null. S->data is actually | |
1162 | a pointer to the `u.data' member of its sdata structure; the | |
1163 | structure starts at a constant offset in front of that. */ | |
1164 | ||
31d929e5 GM |
1165 | #ifdef GC_CHECK_STRING_BYTES |
1166 | ||
1167 | #define SDATA_OF_STRING(S) \ | |
1168 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *) \ | |
1169 | - sizeof (EMACS_INT))) | |
1170 | ||
1171 | #else /* not GC_CHECK_STRING_BYTES */ | |
1172 | ||
2e471eb5 GM |
1173 | #define SDATA_OF_STRING(S) \ |
1174 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *))) | |
1175 | ||
31d929e5 GM |
1176 | #endif /* not GC_CHECK_STRING_BYTES */ |
1177 | ||
2e471eb5 GM |
1178 | /* Value is the size of an sdata structure large enough to hold NBYTES |
1179 | bytes of string data. The value returned includes a terminating | |
1180 | NUL byte, the size of the sdata structure, and padding. */ | |
1181 | ||
31d929e5 GM |
1182 | #ifdef GC_CHECK_STRING_BYTES |
1183 | ||
2e471eb5 GM |
1184 | #define SDATA_SIZE(NBYTES) \ |
1185 | ((sizeof (struct Lisp_String *) \ | |
1186 | + (NBYTES) + 1 \ | |
31d929e5 | 1187 | + sizeof (EMACS_INT) \ |
2e471eb5 GM |
1188 | + sizeof (EMACS_INT) - 1) \ |
1189 | & ~(sizeof (EMACS_INT) - 1)) | |
1190 | ||
31d929e5 GM |
1191 | #else /* not GC_CHECK_STRING_BYTES */ |
1192 | ||
1193 | #define SDATA_SIZE(NBYTES) \ | |
1194 | ((sizeof (struct Lisp_String *) \ | |
1195 | + (NBYTES) + 1 \ | |
1196 | + sizeof (EMACS_INT) - 1) \ | |
1197 | & ~(sizeof (EMACS_INT) - 1)) | |
1198 | ||
1199 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 GM |
1200 | |
1201 | /* Initialize string allocation. Called from init_alloc_once. */ | |
d457598b AS |
1202 | |
1203 | void | |
2e471eb5 | 1204 | init_strings () |
7146af97 | 1205 | { |
2e471eb5 GM |
1206 | total_strings = total_free_strings = total_string_size = 0; |
1207 | oldest_sblock = current_sblock = large_sblocks = NULL; | |
1208 | string_blocks = NULL; | |
1209 | n_string_blocks = 0; | |
1210 | string_free_list = NULL; | |
7146af97 JB |
1211 | } |
1212 | ||
2e471eb5 | 1213 | |
361b097f GM |
1214 | #ifdef GC_CHECK_STRING_BYTES |
1215 | ||
361b097f GM |
1216 | static int check_string_bytes_count; |
1217 | ||
676a7251 GM |
1218 | void check_string_bytes P_ ((int)); |
1219 | void check_sblock P_ ((struct sblock *)); | |
1220 | ||
1221 | #define CHECK_STRING_BYTES(S) STRING_BYTES (S) | |
1222 | ||
1223 | ||
1224 | /* Like GC_STRING_BYTES, but with debugging check. */ | |
1225 | ||
1226 | int | |
1227 | string_bytes (s) | |
1228 | struct Lisp_String *s; | |
1229 | { | |
1230 | int nbytes = (s->size_byte < 0 ? s->size : s->size_byte) & ~MARKBIT; | |
1231 | if (!PURE_POINTER_P (s) | |
1232 | && s->data | |
1233 | && nbytes != SDATA_NBYTES (SDATA_OF_STRING (s))) | |
1234 | abort (); | |
1235 | return nbytes; | |
1236 | } | |
1237 | ||
1238 | /* Check validity Lisp strings' string_bytes member in B. */ | |
1239 | ||
361b097f | 1240 | void |
676a7251 GM |
1241 | check_sblock (b) |
1242 | struct sblock *b; | |
361b097f | 1243 | { |
676a7251 | 1244 | struct sdata *from, *end, *from_end; |
361b097f | 1245 | |
676a7251 GM |
1246 | end = b->next_free; |
1247 | ||
1248 | for (from = &b->first_data; from < end; from = from_end) | |
361b097f | 1249 | { |
676a7251 GM |
1250 | /* Compute the next FROM here because copying below may |
1251 | overwrite data we need to compute it. */ | |
1252 | int nbytes; | |
361b097f | 1253 | |
676a7251 GM |
1254 | /* Check that the string size recorded in the string is the |
1255 | same as the one recorded in the sdata structure. */ | |
1256 | if (from->string) | |
1257 | CHECK_STRING_BYTES (from->string); | |
361b097f | 1258 | |
676a7251 GM |
1259 | if (from->string) |
1260 | nbytes = GC_STRING_BYTES (from->string); | |
1261 | else | |
1262 | nbytes = SDATA_NBYTES (from); | |
1263 | ||
1264 | nbytes = SDATA_SIZE (nbytes); | |
1265 | from_end = (struct sdata *) ((char *) from + nbytes); | |
1266 | } | |
1267 | } | |
361b097f | 1268 | |
676a7251 GM |
1269 | |
1270 | /* Check validity of Lisp strings' string_bytes member. ALL_P | |
1271 | non-zero means check all strings, otherwise check only most | |
1272 | recently allocated strings. Used for hunting a bug. */ | |
1273 | ||
1274 | void | |
1275 | check_string_bytes (all_p) | |
1276 | int all_p; | |
1277 | { | |
1278 | if (all_p) | |
1279 | { | |
1280 | struct sblock *b; | |
1281 | ||
1282 | for (b = large_sblocks; b; b = b->next) | |
1283 | { | |
1284 | struct Lisp_String *s = b->first_data.string; | |
1285 | if (s) | |
1286 | CHECK_STRING_BYTES (s); | |
361b097f | 1287 | } |
676a7251 GM |
1288 | |
1289 | for (b = oldest_sblock; b; b = b->next) | |
1290 | check_sblock (b); | |
361b097f | 1291 | } |
676a7251 GM |
1292 | else |
1293 | check_sblock (current_sblock); | |
361b097f GM |
1294 | } |
1295 | ||
1296 | #endif /* GC_CHECK_STRING_BYTES */ | |
1297 | ||
1298 | ||
2e471eb5 GM |
1299 | /* Return a new Lisp_String. */ |
1300 | ||
1301 | static struct Lisp_String * | |
1302 | allocate_string () | |
7146af97 | 1303 | { |
2e471eb5 | 1304 | struct Lisp_String *s; |
7146af97 | 1305 | |
2e471eb5 GM |
1306 | /* If the free-list is empty, allocate a new string_block, and |
1307 | add all the Lisp_Strings in it to the free-list. */ | |
1308 | if (string_free_list == NULL) | |
7146af97 | 1309 | { |
2e471eb5 GM |
1310 | struct string_block *b; |
1311 | int i; | |
1312 | ||
34400008 | 1313 | b = (struct string_block *) lisp_malloc (sizeof *b, MEM_TYPE_STRING); |
2e471eb5 GM |
1314 | VALIDATE_LISP_STORAGE (b, sizeof *b); |
1315 | bzero (b, sizeof *b); | |
1316 | b->next = string_blocks; | |
1317 | string_blocks = b; | |
1318 | ++n_string_blocks; | |
1319 | ||
1320 | for (i = STRINGS_IN_STRING_BLOCK - 1; i >= 0; --i) | |
7146af97 | 1321 | { |
2e471eb5 GM |
1322 | s = b->strings + i; |
1323 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1324 | string_free_list = s; | |
7146af97 | 1325 | } |
2e471eb5 GM |
1326 | |
1327 | total_free_strings += STRINGS_IN_STRING_BLOCK; | |
7146af97 | 1328 | } |
c0f51373 | 1329 | |
2e471eb5 GM |
1330 | /* Pop a Lisp_String off the free-list. */ |
1331 | s = string_free_list; | |
1332 | string_free_list = NEXT_FREE_LISP_STRING (s); | |
c0f51373 | 1333 | |
2e471eb5 GM |
1334 | /* Probably not strictly necessary, but play it safe. */ |
1335 | bzero (s, sizeof *s); | |
c0f51373 | 1336 | |
2e471eb5 GM |
1337 | --total_free_strings; |
1338 | ++total_strings; | |
1339 | ++strings_consed; | |
1340 | consing_since_gc += sizeof *s; | |
c0f51373 | 1341 | |
361b097f | 1342 | #ifdef GC_CHECK_STRING_BYTES |
83a96b4d | 1343 | if (!noninteractive |
e0f712ba | 1344 | #ifdef MAC_OS8 |
83a96b4d AC |
1345 | && current_sblock |
1346 | #endif | |
1347 | ) | |
361b097f | 1348 | { |
676a7251 GM |
1349 | if (++check_string_bytes_count == 200) |
1350 | { | |
1351 | check_string_bytes_count = 0; | |
1352 | check_string_bytes (1); | |
1353 | } | |
1354 | else | |
1355 | check_string_bytes (0); | |
361b097f | 1356 | } |
676a7251 | 1357 | #endif /* GC_CHECK_STRING_BYTES */ |
361b097f | 1358 | |
2e471eb5 | 1359 | return s; |
c0f51373 | 1360 | } |
7146af97 | 1361 | |
7146af97 | 1362 | |
2e471eb5 GM |
1363 | /* Set up Lisp_String S for holding NCHARS characters, NBYTES bytes, |
1364 | plus a NUL byte at the end. Allocate an sdata structure for S, and | |
1365 | set S->data to its `u.data' member. Store a NUL byte at the end of | |
1366 | S->data. Set S->size to NCHARS and S->size_byte to NBYTES. Free | |
1367 | S->data if it was initially non-null. */ | |
7146af97 | 1368 | |
2e471eb5 GM |
1369 | void |
1370 | allocate_string_data (s, nchars, nbytes) | |
1371 | struct Lisp_String *s; | |
1372 | int nchars, nbytes; | |
7146af97 | 1373 | { |
5c5fecb3 | 1374 | struct sdata *data, *old_data; |
2e471eb5 | 1375 | struct sblock *b; |
5c5fecb3 | 1376 | int needed, old_nbytes; |
7146af97 | 1377 | |
2e471eb5 GM |
1378 | /* Determine the number of bytes needed to store NBYTES bytes |
1379 | of string data. */ | |
1380 | needed = SDATA_SIZE (nbytes); | |
7146af97 | 1381 | |
2e471eb5 GM |
1382 | if (nbytes > LARGE_STRING_BYTES) |
1383 | { | |
675d5130 | 1384 | size_t size = sizeof *b - sizeof (struct sdata) + needed; |
2e471eb5 GM |
1385 | |
1386 | #ifdef DOUG_LEA_MALLOC | |
f8608968 GM |
1387 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
1388 | because mapped region contents are not preserved in | |
1389 | a dumped Emacs. */ | |
2e471eb5 GM |
1390 | mallopt (M_MMAP_MAX, 0); |
1391 | #endif | |
1392 | ||
34400008 | 1393 | b = (struct sblock *) lisp_malloc (size, MEM_TYPE_NON_LISP); |
2e471eb5 GM |
1394 | |
1395 | #ifdef DOUG_LEA_MALLOC | |
1396 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
1397 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
1398 | #endif | |
1399 | ||
1400 | b->next_free = &b->first_data; | |
1401 | b->first_data.string = NULL; | |
1402 | b->next = large_sblocks; | |
1403 | large_sblocks = b; | |
1404 | } | |
1405 | else if (current_sblock == NULL | |
1406 | || (((char *) current_sblock + SBLOCK_SIZE | |
1407 | - (char *) current_sblock->next_free) | |
1408 | < needed)) | |
1409 | { | |
1410 | /* Not enough room in the current sblock. */ | |
34400008 | 1411 | b = (struct sblock *) lisp_malloc (SBLOCK_SIZE, MEM_TYPE_NON_LISP); |
2e471eb5 GM |
1412 | b->next_free = &b->first_data; |
1413 | b->first_data.string = NULL; | |
1414 | b->next = NULL; | |
1415 | ||
1416 | if (current_sblock) | |
1417 | current_sblock->next = b; | |
1418 | else | |
1419 | oldest_sblock = b; | |
1420 | current_sblock = b; | |
1421 | } | |
1422 | else | |
1423 | b = current_sblock; | |
5c5fecb3 GM |
1424 | |
1425 | old_data = s->data ? SDATA_OF_STRING (s) : NULL; | |
1426 | old_nbytes = GC_STRING_BYTES (s); | |
2e471eb5 GM |
1427 | |
1428 | data = b->next_free; | |
1429 | data->string = s; | |
31d929e5 GM |
1430 | s->data = SDATA_DATA (data); |
1431 | #ifdef GC_CHECK_STRING_BYTES | |
1432 | SDATA_NBYTES (data) = nbytes; | |
1433 | #endif | |
2e471eb5 GM |
1434 | s->size = nchars; |
1435 | s->size_byte = nbytes; | |
1436 | s->data[nbytes] = '\0'; | |
1437 | b->next_free = (struct sdata *) ((char *) data + needed); | |
1438 | ||
5c5fecb3 GM |
1439 | /* If S had already data assigned, mark that as free by setting its |
1440 | string back-pointer to null, and recording the size of the data | |
00c9c33c | 1441 | in it. */ |
5c5fecb3 GM |
1442 | if (old_data) |
1443 | { | |
31d929e5 | 1444 | SDATA_NBYTES (old_data) = old_nbytes; |
5c5fecb3 GM |
1445 | old_data->string = NULL; |
1446 | } | |
1447 | ||
2e471eb5 GM |
1448 | consing_since_gc += needed; |
1449 | } | |
1450 | ||
1451 | ||
1452 | /* Sweep and compact strings. */ | |
1453 | ||
1454 | static void | |
1455 | sweep_strings () | |
1456 | { | |
1457 | struct string_block *b, *next; | |
1458 | struct string_block *live_blocks = NULL; | |
1459 | ||
1460 | string_free_list = NULL; | |
1461 | total_strings = total_free_strings = 0; | |
1462 | total_string_size = 0; | |
1463 | ||
1464 | /* Scan strings_blocks, free Lisp_Strings that aren't marked. */ | |
1465 | for (b = string_blocks; b; b = next) | |
1466 | { | |
1467 | int i, nfree = 0; | |
1468 | struct Lisp_String *free_list_before = string_free_list; | |
1469 | ||
1470 | next = b->next; | |
1471 | ||
1472 | for (i = 0; i < STRINGS_IN_STRING_BLOCK; ++i) | |
1473 | { | |
1474 | struct Lisp_String *s = b->strings + i; | |
1475 | ||
1476 | if (s->data) | |
1477 | { | |
1478 | /* String was not on free-list before. */ | |
1479 | if (STRING_MARKED_P (s)) | |
1480 | { | |
1481 | /* String is live; unmark it and its intervals. */ | |
1482 | UNMARK_STRING (s); | |
1483 | ||
1484 | if (!NULL_INTERVAL_P (s->intervals)) | |
1485 | UNMARK_BALANCE_INTERVALS (s->intervals); | |
1486 | ||
1487 | ++total_strings; | |
1488 | total_string_size += STRING_BYTES (s); | |
1489 | } | |
1490 | else | |
1491 | { | |
1492 | /* String is dead. Put it on the free-list. */ | |
1493 | struct sdata *data = SDATA_OF_STRING (s); | |
1494 | ||
1495 | /* Save the size of S in its sdata so that we know | |
1496 | how large that is. Reset the sdata's string | |
1497 | back-pointer so that we know it's free. */ | |
31d929e5 GM |
1498 | #ifdef GC_CHECK_STRING_BYTES |
1499 | if (GC_STRING_BYTES (s) != SDATA_NBYTES (data)) | |
1500 | abort (); | |
1501 | #else | |
2e471eb5 | 1502 | data->u.nbytes = GC_STRING_BYTES (s); |
31d929e5 | 1503 | #endif |
2e471eb5 GM |
1504 | data->string = NULL; |
1505 | ||
1506 | /* Reset the strings's `data' member so that we | |
1507 | know it's free. */ | |
1508 | s->data = NULL; | |
1509 | ||
1510 | /* Put the string on the free-list. */ | |
1511 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1512 | string_free_list = s; | |
1513 | ++nfree; | |
1514 | } | |
1515 | } | |
1516 | else | |
1517 | { | |
1518 | /* S was on the free-list before. Put it there again. */ | |
1519 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1520 | string_free_list = s; | |
1521 | ++nfree; | |
1522 | } | |
1523 | } | |
1524 | ||
34400008 | 1525 | /* Free blocks that contain free Lisp_Strings only, except |
2e471eb5 GM |
1526 | the first two of them. */ |
1527 | if (nfree == STRINGS_IN_STRING_BLOCK | |
1528 | && total_free_strings > STRINGS_IN_STRING_BLOCK) | |
1529 | { | |
1530 | lisp_free (b); | |
1531 | --n_string_blocks; | |
1532 | string_free_list = free_list_before; | |
1533 | } | |
1534 | else | |
1535 | { | |
1536 | total_free_strings += nfree; | |
1537 | b->next = live_blocks; | |
1538 | live_blocks = b; | |
1539 | } | |
1540 | } | |
1541 | ||
1542 | string_blocks = live_blocks; | |
1543 | free_large_strings (); | |
1544 | compact_small_strings (); | |
1545 | } | |
1546 | ||
1547 | ||
1548 | /* Free dead large strings. */ | |
1549 | ||
1550 | static void | |
1551 | free_large_strings () | |
1552 | { | |
1553 | struct sblock *b, *next; | |
1554 | struct sblock *live_blocks = NULL; | |
1555 | ||
1556 | for (b = large_sblocks; b; b = next) | |
1557 | { | |
1558 | next = b->next; | |
1559 | ||
1560 | if (b->first_data.string == NULL) | |
1561 | lisp_free (b); | |
1562 | else | |
1563 | { | |
1564 | b->next = live_blocks; | |
1565 | live_blocks = b; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | large_sblocks = live_blocks; | |
1570 | } | |
1571 | ||
1572 | ||
1573 | /* Compact data of small strings. Free sblocks that don't contain | |
1574 | data of live strings after compaction. */ | |
1575 | ||
1576 | static void | |
1577 | compact_small_strings () | |
1578 | { | |
1579 | struct sblock *b, *tb, *next; | |
1580 | struct sdata *from, *to, *end, *tb_end; | |
1581 | struct sdata *to_end, *from_end; | |
1582 | ||
1583 | /* TB is the sblock we copy to, TO is the sdata within TB we copy | |
1584 | to, and TB_END is the end of TB. */ | |
1585 | tb = oldest_sblock; | |
1586 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
1587 | to = &tb->first_data; | |
1588 | ||
1589 | /* Step through the blocks from the oldest to the youngest. We | |
1590 | expect that old blocks will stabilize over time, so that less | |
1591 | copying will happen this way. */ | |
1592 | for (b = oldest_sblock; b; b = b->next) | |
1593 | { | |
1594 | end = b->next_free; | |
1595 | xassert ((char *) end <= (char *) b + SBLOCK_SIZE); | |
1596 | ||
1597 | for (from = &b->first_data; from < end; from = from_end) | |
1598 | { | |
1599 | /* Compute the next FROM here because copying below may | |
1600 | overwrite data we need to compute it. */ | |
1601 | int nbytes; | |
1602 | ||
31d929e5 GM |
1603 | #ifdef GC_CHECK_STRING_BYTES |
1604 | /* Check that the string size recorded in the string is the | |
1605 | same as the one recorded in the sdata structure. */ | |
1606 | if (from->string | |
1607 | && GC_STRING_BYTES (from->string) != SDATA_NBYTES (from)) | |
1608 | abort (); | |
1609 | #endif /* GC_CHECK_STRING_BYTES */ | |
1610 | ||
2e471eb5 GM |
1611 | if (from->string) |
1612 | nbytes = GC_STRING_BYTES (from->string); | |
1613 | else | |
31d929e5 | 1614 | nbytes = SDATA_NBYTES (from); |
2e471eb5 GM |
1615 | |
1616 | nbytes = SDATA_SIZE (nbytes); | |
1617 | from_end = (struct sdata *) ((char *) from + nbytes); | |
1618 | ||
1619 | /* FROM->string non-null means it's alive. Copy its data. */ | |
1620 | if (from->string) | |
1621 | { | |
1622 | /* If TB is full, proceed with the next sblock. */ | |
1623 | to_end = (struct sdata *) ((char *) to + nbytes); | |
1624 | if (to_end > tb_end) | |
1625 | { | |
1626 | tb->next_free = to; | |
1627 | tb = tb->next; | |
1628 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
1629 | to = &tb->first_data; | |
1630 | to_end = (struct sdata *) ((char *) to + nbytes); | |
1631 | } | |
1632 | ||
1633 | /* Copy, and update the string's `data' pointer. */ | |
1634 | if (from != to) | |
1635 | { | |
a2407477 GM |
1636 | xassert (tb != b || to <= from); |
1637 | safe_bcopy ((char *) from, (char *) to, nbytes); | |
31d929e5 | 1638 | to->string->data = SDATA_DATA (to); |
2e471eb5 GM |
1639 | } |
1640 | ||
1641 | /* Advance past the sdata we copied to. */ | |
1642 | to = to_end; | |
1643 | } | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | /* The rest of the sblocks following TB don't contain live data, so | |
1648 | we can free them. */ | |
1649 | for (b = tb->next; b; b = next) | |
1650 | { | |
1651 | next = b->next; | |
1652 | lisp_free (b); | |
1653 | } | |
1654 | ||
1655 | tb->next_free = to; | |
1656 | tb->next = NULL; | |
1657 | current_sblock = tb; | |
1658 | } | |
1659 | ||
1660 | ||
1661 | DEFUN ("make-string", Fmake_string, Smake_string, 2, 2, 0, | |
a6266d23 | 1662 | doc: /* Return a newly created string of length LENGTH, with each element being INIT. |
7ee72033 MB |
1663 | Both LENGTH and INIT must be numbers. */) |
1664 | (length, init) | |
2e471eb5 GM |
1665 | Lisp_Object length, init; |
1666 | { | |
1667 | register Lisp_Object val; | |
1668 | register unsigned char *p, *end; | |
1669 | int c, nbytes; | |
1670 | ||
b7826503 PJ |
1671 | CHECK_NATNUM (length); |
1672 | CHECK_NUMBER (init); | |
2e471eb5 GM |
1673 | |
1674 | c = XINT (init); | |
1675 | if (SINGLE_BYTE_CHAR_P (c)) | |
1676 | { | |
1677 | nbytes = XINT (length); | |
1678 | val = make_uninit_string (nbytes); | |
1679 | p = XSTRING (val)->data; | |
1680 | end = p + XSTRING (val)->size; | |
1681 | while (p != end) | |
1682 | *p++ = c; | |
1683 | } | |
1684 | else | |
1685 | { | |
d942b71c | 1686 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2e471eb5 GM |
1687 | int len = CHAR_STRING (c, str); |
1688 | ||
1689 | nbytes = len * XINT (length); | |
1690 | val = make_uninit_multibyte_string (XINT (length), nbytes); | |
1691 | p = XSTRING (val)->data; | |
1692 | end = p + nbytes; | |
1693 | while (p != end) | |
1694 | { | |
1695 | bcopy (str, p, len); | |
1696 | p += len; | |
1697 | } | |
1698 | } | |
1699 | ||
1700 | *p = 0; | |
1701 | return val; | |
1702 | } | |
1703 | ||
1704 | ||
1705 | DEFUN ("make-bool-vector", Fmake_bool_vector, Smake_bool_vector, 2, 2, 0, | |
a6266d23 | 1706 | doc: /* Return a new bool-vector of length LENGTH, using INIT for as each element. |
7ee72033 MB |
1707 | LENGTH must be a number. INIT matters only in whether it is t or nil. */) |
1708 | (length, init) | |
2e471eb5 GM |
1709 | Lisp_Object length, init; |
1710 | { | |
1711 | register Lisp_Object val; | |
1712 | struct Lisp_Bool_Vector *p; | |
1713 | int real_init, i; | |
1714 | int length_in_chars, length_in_elts, bits_per_value; | |
1715 | ||
b7826503 | 1716 | CHECK_NATNUM (length); |
2e471eb5 GM |
1717 | |
1718 | bits_per_value = sizeof (EMACS_INT) * BITS_PER_CHAR; | |
1719 | ||
1720 | length_in_elts = (XFASTINT (length) + bits_per_value - 1) / bits_per_value; | |
1721 | length_in_chars = ((XFASTINT (length) + BITS_PER_CHAR - 1) / BITS_PER_CHAR); | |
1722 | ||
1723 | /* We must allocate one more elements than LENGTH_IN_ELTS for the | |
1724 | slot `size' of the struct Lisp_Bool_Vector. */ | |
1725 | val = Fmake_vector (make_number (length_in_elts + 1), Qnil); | |
1726 | p = XBOOL_VECTOR (val); | |
34400008 | 1727 | |
2e471eb5 GM |
1728 | /* Get rid of any bits that would cause confusion. */ |
1729 | p->vector_size = 0; | |
1730 | XSETBOOL_VECTOR (val, p); | |
1731 | p->size = XFASTINT (length); | |
1732 | ||
1733 | real_init = (NILP (init) ? 0 : -1); | |
1734 | for (i = 0; i < length_in_chars ; i++) | |
1735 | p->data[i] = real_init; | |
34400008 | 1736 | |
2e471eb5 GM |
1737 | /* Clear the extraneous bits in the last byte. */ |
1738 | if (XINT (length) != length_in_chars * BITS_PER_CHAR) | |
1739 | XBOOL_VECTOR (val)->data[length_in_chars - 1] | |
1740 | &= (1 << (XINT (length) % BITS_PER_CHAR)) - 1; | |
1741 | ||
1742 | return val; | |
1743 | } | |
1744 | ||
1745 | ||
1746 | /* Make a string from NBYTES bytes at CONTENTS, and compute the number | |
1747 | of characters from the contents. This string may be unibyte or | |
1748 | multibyte, depending on the contents. */ | |
1749 | ||
1750 | Lisp_Object | |
1751 | make_string (contents, nbytes) | |
1752 | char *contents; | |
1753 | int nbytes; | |
1754 | { | |
1755 | register Lisp_Object val; | |
9eac9d59 KH |
1756 | int nchars, multibyte_nbytes; |
1757 | ||
1758 | parse_str_as_multibyte (contents, nbytes, &nchars, &multibyte_nbytes); | |
9eac9d59 KH |
1759 | if (nbytes == nchars || nbytes != multibyte_nbytes) |
1760 | /* CONTENTS contains no multibyte sequences or contains an invalid | |
1761 | multibyte sequence. We must make unibyte string. */ | |
495a6df3 KH |
1762 | val = make_unibyte_string (contents, nbytes); |
1763 | else | |
1764 | val = make_multibyte_string (contents, nchars, nbytes); | |
2e471eb5 GM |
1765 | return val; |
1766 | } | |
1767 | ||
1768 | ||
1769 | /* Make an unibyte string from LENGTH bytes at CONTENTS. */ | |
1770 | ||
1771 | Lisp_Object | |
1772 | make_unibyte_string (contents, length) | |
1773 | char *contents; | |
1774 | int length; | |
1775 | { | |
1776 | register Lisp_Object val; | |
1777 | val = make_uninit_string (length); | |
1778 | bcopy (contents, XSTRING (val)->data, length); | |
1779 | SET_STRING_BYTES (XSTRING (val), -1); | |
1780 | return val; | |
1781 | } | |
1782 | ||
1783 | ||
1784 | /* Make a multibyte string from NCHARS characters occupying NBYTES | |
1785 | bytes at CONTENTS. */ | |
1786 | ||
1787 | Lisp_Object | |
1788 | make_multibyte_string (contents, nchars, nbytes) | |
1789 | char *contents; | |
1790 | int nchars, nbytes; | |
1791 | { | |
1792 | register Lisp_Object val; | |
1793 | val = make_uninit_multibyte_string (nchars, nbytes); | |
1794 | bcopy (contents, XSTRING (val)->data, nbytes); | |
1795 | return val; | |
1796 | } | |
1797 | ||
1798 | ||
1799 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
1800 | CONTENTS. It is a multibyte string if NBYTES != NCHARS. */ | |
1801 | ||
1802 | Lisp_Object | |
1803 | make_string_from_bytes (contents, nchars, nbytes) | |
1804 | char *contents; | |
1805 | int nchars, nbytes; | |
1806 | { | |
1807 | register Lisp_Object val; | |
1808 | val = make_uninit_multibyte_string (nchars, nbytes); | |
1809 | bcopy (contents, XSTRING (val)->data, nbytes); | |
1810 | if (STRING_BYTES (XSTRING (val)) == XSTRING (val)->size) | |
1811 | SET_STRING_BYTES (XSTRING (val), -1); | |
1812 | return val; | |
1813 | } | |
1814 | ||
1815 | ||
1816 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
1817 | CONTENTS. The argument MULTIBYTE controls whether to label the | |
1818 | string as multibyte. */ | |
1819 | ||
1820 | Lisp_Object | |
1821 | make_specified_string (contents, nchars, nbytes, multibyte) | |
1822 | char *contents; | |
1823 | int nchars, nbytes; | |
1824 | int multibyte; | |
1825 | { | |
1826 | register Lisp_Object val; | |
1827 | val = make_uninit_multibyte_string (nchars, nbytes); | |
1828 | bcopy (contents, XSTRING (val)->data, nbytes); | |
1829 | if (!multibyte) | |
1830 | SET_STRING_BYTES (XSTRING (val), -1); | |
1831 | return val; | |
1832 | } | |
1833 | ||
1834 | ||
1835 | /* Make a string from the data at STR, treating it as multibyte if the | |
1836 | data warrants. */ | |
1837 | ||
1838 | Lisp_Object | |
1839 | build_string (str) | |
1840 | char *str; | |
1841 | { | |
1842 | return make_string (str, strlen (str)); | |
1843 | } | |
1844 | ||
1845 | ||
1846 | /* Return an unibyte Lisp_String set up to hold LENGTH characters | |
1847 | occupying LENGTH bytes. */ | |
1848 | ||
1849 | Lisp_Object | |
1850 | make_uninit_string (length) | |
1851 | int length; | |
1852 | { | |
1853 | Lisp_Object val; | |
1854 | val = make_uninit_multibyte_string (length, length); | |
1855 | SET_STRING_BYTES (XSTRING (val), -1); | |
1856 | return val; | |
1857 | } | |
1858 | ||
1859 | ||
1860 | /* Return a multibyte Lisp_String set up to hold NCHARS characters | |
1861 | which occupy NBYTES bytes. */ | |
1862 | ||
1863 | Lisp_Object | |
1864 | make_uninit_multibyte_string (nchars, nbytes) | |
1865 | int nchars, nbytes; | |
1866 | { | |
1867 | Lisp_Object string; | |
1868 | struct Lisp_String *s; | |
1869 | ||
1870 | if (nchars < 0) | |
1871 | abort (); | |
1872 | ||
1873 | s = allocate_string (); | |
1874 | allocate_string_data (s, nchars, nbytes); | |
1875 | XSETSTRING (string, s); | |
1876 | string_chars_consed += nbytes; | |
1877 | return string; | |
1878 | } | |
1879 | ||
1880 | ||
1881 | \f | |
1882 | /*********************************************************************** | |
1883 | Float Allocation | |
1884 | ***********************************************************************/ | |
1885 | ||
2e471eb5 GM |
1886 | /* We store float cells inside of float_blocks, allocating a new |
1887 | float_block with malloc whenever necessary. Float cells reclaimed | |
1888 | by GC are put on a free list to be reallocated before allocating | |
1889 | any new float cells from the latest float_block. | |
1890 | ||
1891 | Each float_block is just under 1020 bytes long, since malloc really | |
1892 | allocates in units of powers of two and uses 4 bytes for its own | |
1893 | overhead. */ | |
1894 | ||
1895 | #define FLOAT_BLOCK_SIZE \ | |
1896 | ((1020 - sizeof (struct float_block *)) / sizeof (struct Lisp_Float)) | |
1897 | ||
1898 | struct float_block | |
1899 | { | |
1900 | struct float_block *next; | |
1901 | struct Lisp_Float floats[FLOAT_BLOCK_SIZE]; | |
1902 | }; | |
1903 | ||
34400008 GM |
1904 | /* Current float_block. */ |
1905 | ||
2e471eb5 | 1906 | struct float_block *float_block; |
34400008 GM |
1907 | |
1908 | /* Index of first unused Lisp_Float in the current float_block. */ | |
1909 | ||
2e471eb5 GM |
1910 | int float_block_index; |
1911 | ||
1912 | /* Total number of float blocks now in use. */ | |
1913 | ||
1914 | int n_float_blocks; | |
1915 | ||
34400008 GM |
1916 | /* Free-list of Lisp_Floats. */ |
1917 | ||
2e471eb5 GM |
1918 | struct Lisp_Float *float_free_list; |
1919 | ||
34400008 | 1920 | |
966533c9 | 1921 | /* Initialize float allocation. */ |
34400008 | 1922 | |
2e471eb5 GM |
1923 | void |
1924 | init_float () | |
1925 | { | |
34400008 GM |
1926 | float_block = (struct float_block *) lisp_malloc (sizeof *float_block, |
1927 | MEM_TYPE_FLOAT); | |
2e471eb5 GM |
1928 | float_block->next = 0; |
1929 | bzero ((char *) float_block->floats, sizeof float_block->floats); | |
1930 | float_block_index = 0; | |
1931 | float_free_list = 0; | |
1932 | n_float_blocks = 1; | |
1933 | } | |
1934 | ||
34400008 GM |
1935 | |
1936 | /* Explicitly free a float cell by putting it on the free-list. */ | |
2e471eb5 GM |
1937 | |
1938 | void | |
1939 | free_float (ptr) | |
1940 | struct Lisp_Float *ptr; | |
1941 | { | |
1942 | *(struct Lisp_Float **)&ptr->data = float_free_list; | |
34400008 GM |
1943 | #if GC_MARK_STACK |
1944 | ptr->type = Vdead; | |
1945 | #endif | |
2e471eb5 GM |
1946 | float_free_list = ptr; |
1947 | } | |
1948 | ||
34400008 GM |
1949 | |
1950 | /* Return a new float object with value FLOAT_VALUE. */ | |
1951 | ||
2e471eb5 GM |
1952 | Lisp_Object |
1953 | make_float (float_value) | |
1954 | double float_value; | |
1955 | { | |
1956 | register Lisp_Object val; | |
1957 | ||
1958 | if (float_free_list) | |
1959 | { | |
1960 | /* We use the data field for chaining the free list | |
1961 | so that we won't use the same field that has the mark bit. */ | |
1962 | XSETFLOAT (val, float_free_list); | |
1963 | float_free_list = *(struct Lisp_Float **)&float_free_list->data; | |
1964 | } | |
1965 | else | |
1966 | { | |
1967 | if (float_block_index == FLOAT_BLOCK_SIZE) | |
1968 | { | |
1969 | register struct float_block *new; | |
1970 | ||
34400008 GM |
1971 | new = (struct float_block *) lisp_malloc (sizeof *new, |
1972 | MEM_TYPE_FLOAT); | |
2e471eb5 GM |
1973 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
1974 | new->next = float_block; | |
1975 | float_block = new; | |
1976 | float_block_index = 0; | |
1977 | n_float_blocks++; | |
1978 | } | |
1979 | XSETFLOAT (val, &float_block->floats[float_block_index++]); | |
1980 | } | |
1981 | ||
1982 | XFLOAT_DATA (val) = float_value; | |
1983 | XSETFASTINT (XFLOAT (val)->type, 0); /* bug chasing -wsr */ | |
1984 | consing_since_gc += sizeof (struct Lisp_Float); | |
1985 | floats_consed++; | |
1986 | return val; | |
1987 | } | |
1988 | ||
2e471eb5 GM |
1989 | |
1990 | \f | |
1991 | /*********************************************************************** | |
1992 | Cons Allocation | |
1993 | ***********************************************************************/ | |
1994 | ||
1995 | /* We store cons cells inside of cons_blocks, allocating a new | |
1996 | cons_block with malloc whenever necessary. Cons cells reclaimed by | |
1997 | GC are put on a free list to be reallocated before allocating | |
1998 | any new cons cells from the latest cons_block. | |
1999 | ||
2000 | Each cons_block is just under 1020 bytes long, | |
2001 | since malloc really allocates in units of powers of two | |
2002 | and uses 4 bytes for its own overhead. */ | |
2003 | ||
2004 | #define CONS_BLOCK_SIZE \ | |
2005 | ((1020 - sizeof (struct cons_block *)) / sizeof (struct Lisp_Cons)) | |
2006 | ||
2007 | struct cons_block | |
2008 | { | |
2009 | struct cons_block *next; | |
2010 | struct Lisp_Cons conses[CONS_BLOCK_SIZE]; | |
2011 | }; | |
2012 | ||
34400008 GM |
2013 | /* Current cons_block. */ |
2014 | ||
2e471eb5 | 2015 | struct cons_block *cons_block; |
34400008 GM |
2016 | |
2017 | /* Index of first unused Lisp_Cons in the current block. */ | |
2018 | ||
2e471eb5 GM |
2019 | int cons_block_index; |
2020 | ||
34400008 GM |
2021 | /* Free-list of Lisp_Cons structures. */ |
2022 | ||
2e471eb5 GM |
2023 | struct Lisp_Cons *cons_free_list; |
2024 | ||
2025 | /* Total number of cons blocks now in use. */ | |
2026 | ||
2027 | int n_cons_blocks; | |
2028 | ||
34400008 GM |
2029 | |
2030 | /* Initialize cons allocation. */ | |
2031 | ||
2e471eb5 GM |
2032 | void |
2033 | init_cons () | |
2034 | { | |
34400008 GM |
2035 | cons_block = (struct cons_block *) lisp_malloc (sizeof *cons_block, |
2036 | MEM_TYPE_CONS); | |
2e471eb5 GM |
2037 | cons_block->next = 0; |
2038 | bzero ((char *) cons_block->conses, sizeof cons_block->conses); | |
2039 | cons_block_index = 0; | |
2040 | cons_free_list = 0; | |
2041 | n_cons_blocks = 1; | |
2042 | } | |
2043 | ||
34400008 GM |
2044 | |
2045 | /* Explicitly free a cons cell by putting it on the free-list. */ | |
2e471eb5 GM |
2046 | |
2047 | void | |
2048 | free_cons (ptr) | |
2049 | struct Lisp_Cons *ptr; | |
2050 | { | |
2051 | *(struct Lisp_Cons **)&ptr->cdr = cons_free_list; | |
34400008 GM |
2052 | #if GC_MARK_STACK |
2053 | ptr->car = Vdead; | |
2054 | #endif | |
2e471eb5 GM |
2055 | cons_free_list = ptr; |
2056 | } | |
2057 | ||
34400008 | 2058 | |
2e471eb5 | 2059 | DEFUN ("cons", Fcons, Scons, 2, 2, 0, |
a6266d23 | 2060 | doc: /* Create a new cons, give it CAR and CDR as components, and return it. */) |
7ee72033 | 2061 | (car, cdr) |
2e471eb5 GM |
2062 | Lisp_Object car, cdr; |
2063 | { | |
2064 | register Lisp_Object val; | |
2065 | ||
2066 | if (cons_free_list) | |
2067 | { | |
2068 | /* We use the cdr for chaining the free list | |
2069 | so that we won't use the same field that has the mark bit. */ | |
2070 | XSETCONS (val, cons_free_list); | |
2071 | cons_free_list = *(struct Lisp_Cons **)&cons_free_list->cdr; | |
2072 | } | |
2073 | else | |
2074 | { | |
2075 | if (cons_block_index == CONS_BLOCK_SIZE) | |
2076 | { | |
2077 | register struct cons_block *new; | |
34400008 GM |
2078 | new = (struct cons_block *) lisp_malloc (sizeof *new, |
2079 | MEM_TYPE_CONS); | |
2e471eb5 GM |
2080 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
2081 | new->next = cons_block; | |
2082 | cons_block = new; | |
2083 | cons_block_index = 0; | |
2084 | n_cons_blocks++; | |
2085 | } | |
2086 | XSETCONS (val, &cons_block->conses[cons_block_index++]); | |
2087 | } | |
2088 | ||
f3fbd155 KR |
2089 | XSETCAR (val, car); |
2090 | XSETCDR (val, cdr); | |
2e471eb5 GM |
2091 | consing_since_gc += sizeof (struct Lisp_Cons); |
2092 | cons_cells_consed++; | |
2093 | return val; | |
2094 | } | |
2095 | ||
34400008 | 2096 | |
2e471eb5 GM |
2097 | /* Make a list of 2, 3, 4 or 5 specified objects. */ |
2098 | ||
2099 | Lisp_Object | |
2100 | list2 (arg1, arg2) | |
2101 | Lisp_Object arg1, arg2; | |
2102 | { | |
2103 | return Fcons (arg1, Fcons (arg2, Qnil)); | |
2104 | } | |
2105 | ||
34400008 | 2106 | |
2e471eb5 GM |
2107 | Lisp_Object |
2108 | list3 (arg1, arg2, arg3) | |
2109 | Lisp_Object arg1, arg2, arg3; | |
2110 | { | |
2111 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Qnil))); | |
2112 | } | |
2113 | ||
34400008 | 2114 | |
2e471eb5 GM |
2115 | Lisp_Object |
2116 | list4 (arg1, arg2, arg3, arg4) | |
2117 | Lisp_Object arg1, arg2, arg3, arg4; | |
2118 | { | |
2119 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, Qnil)))); | |
2120 | } | |
2121 | ||
34400008 | 2122 | |
2e471eb5 GM |
2123 | Lisp_Object |
2124 | list5 (arg1, arg2, arg3, arg4, arg5) | |
2125 | Lisp_Object arg1, arg2, arg3, arg4, arg5; | |
2126 | { | |
2127 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, | |
2128 | Fcons (arg5, Qnil))))); | |
2129 | } | |
2130 | ||
34400008 | 2131 | |
2e471eb5 | 2132 | DEFUN ("list", Flist, Slist, 0, MANY, 0, |
eae936e2 | 2133 | doc: /* Return a newly created list with specified arguments as elements. |
ae8e8122 MB |
2134 | Any number of arguments, even zero arguments, are allowed. |
2135 | usage: (list &rest OBJECTS) */) | |
7ee72033 | 2136 | (nargs, args) |
2e471eb5 GM |
2137 | int nargs; |
2138 | register Lisp_Object *args; | |
2139 | { | |
2140 | register Lisp_Object val; | |
2141 | val = Qnil; | |
2142 | ||
2143 | while (nargs > 0) | |
2144 | { | |
2145 | nargs--; | |
2146 | val = Fcons (args[nargs], val); | |
2147 | } | |
2148 | return val; | |
2149 | } | |
2150 | ||
34400008 | 2151 | |
2e471eb5 | 2152 | DEFUN ("make-list", Fmake_list, Smake_list, 2, 2, 0, |
a6266d23 | 2153 | doc: /* Return a newly created list of length LENGTH, with each element being INIT. */) |
7ee72033 | 2154 | (length, init) |
2e471eb5 GM |
2155 | register Lisp_Object length, init; |
2156 | { | |
2157 | register Lisp_Object val; | |
2158 | register int size; | |
2159 | ||
b7826503 | 2160 | CHECK_NATNUM (length); |
2e471eb5 GM |
2161 | size = XFASTINT (length); |
2162 | ||
2163 | val = Qnil; | |
ce070307 GM |
2164 | while (size > 0) |
2165 | { | |
2166 | val = Fcons (init, val); | |
2167 | --size; | |
2168 | ||
2169 | if (size > 0) | |
2170 | { | |
2171 | val = Fcons (init, val); | |
2172 | --size; | |
2173 | ||
2174 | if (size > 0) | |
2175 | { | |
2176 | val = Fcons (init, val); | |
2177 | --size; | |
2178 | ||
2179 | if (size > 0) | |
2180 | { | |
2181 | val = Fcons (init, val); | |
2182 | --size; | |
2183 | ||
2184 | if (size > 0) | |
2185 | { | |
2186 | val = Fcons (init, val); | |
2187 | --size; | |
2188 | } | |
2189 | } | |
2190 | } | |
2191 | } | |
2192 | ||
2193 | QUIT; | |
2194 | } | |
2195 | ||
7146af97 JB |
2196 | return val; |
2197 | } | |
2e471eb5 GM |
2198 | |
2199 | ||
7146af97 | 2200 | \f |
2e471eb5 GM |
2201 | /*********************************************************************** |
2202 | Vector Allocation | |
2203 | ***********************************************************************/ | |
7146af97 | 2204 | |
34400008 GM |
2205 | /* Singly-linked list of all vectors. */ |
2206 | ||
7146af97 JB |
2207 | struct Lisp_Vector *all_vectors; |
2208 | ||
2e471eb5 GM |
2209 | /* Total number of vector-like objects now in use. */ |
2210 | ||
c8099634 RS |
2211 | int n_vectors; |
2212 | ||
34400008 GM |
2213 | |
2214 | /* Value is a pointer to a newly allocated Lisp_Vector structure | |
2215 | with room for LEN Lisp_Objects. */ | |
2216 | ||
ece93c02 GM |
2217 | static struct Lisp_Vector * |
2218 | allocate_vectorlike (len, type) | |
1825c68d | 2219 | EMACS_INT len; |
ece93c02 | 2220 | enum mem_type type; |
1825c68d KH |
2221 | { |
2222 | struct Lisp_Vector *p; | |
675d5130 | 2223 | size_t nbytes; |
1825c68d | 2224 | |
d1658221 | 2225 | #ifdef DOUG_LEA_MALLOC |
f8608968 GM |
2226 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
2227 | because mapped region contents are not preserved in | |
2228 | a dumped Emacs. */ | |
d1658221 RS |
2229 | mallopt (M_MMAP_MAX, 0); |
2230 | #endif | |
34400008 GM |
2231 | |
2232 | nbytes = sizeof *p + (len - 1) * sizeof p->contents[0]; | |
ece93c02 | 2233 | p = (struct Lisp_Vector *) lisp_malloc (nbytes, type); |
34400008 | 2234 | |
d1658221 | 2235 | #ifdef DOUG_LEA_MALLOC |
34400008 | 2236 | /* Back to a reasonable maximum of mmap'ed areas. */ |
81d492d5 | 2237 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); |
d1658221 | 2238 | #endif |
34400008 | 2239 | |
1825c68d | 2240 | VALIDATE_LISP_STORAGE (p, 0); |
34400008 | 2241 | consing_since_gc += nbytes; |
310ea200 | 2242 | vector_cells_consed += len; |
1825c68d KH |
2243 | |
2244 | p->next = all_vectors; | |
2245 | all_vectors = p; | |
34400008 | 2246 | ++n_vectors; |
1825c68d KH |
2247 | return p; |
2248 | } | |
2249 | ||
34400008 | 2250 | |
ece93c02 GM |
2251 | /* Allocate a vector with NSLOTS slots. */ |
2252 | ||
2253 | struct Lisp_Vector * | |
2254 | allocate_vector (nslots) | |
2255 | EMACS_INT nslots; | |
2256 | { | |
2257 | struct Lisp_Vector *v = allocate_vectorlike (nslots, MEM_TYPE_VECTOR); | |
2258 | v->size = nslots; | |
2259 | return v; | |
2260 | } | |
2261 | ||
2262 | ||
2263 | /* Allocate other vector-like structures. */ | |
2264 | ||
2265 | struct Lisp_Hash_Table * | |
2266 | allocate_hash_table () | |
2267 | { | |
2268 | EMACS_INT len = VECSIZE (struct Lisp_Hash_Table); | |
2269 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_HASH_TABLE); | |
2270 | EMACS_INT i; | |
2271 | ||
2272 | v->size = len; | |
2273 | for (i = 0; i < len; ++i) | |
2274 | v->contents[i] = Qnil; | |
2275 | ||
2276 | return (struct Lisp_Hash_Table *) v; | |
2277 | } | |
2278 | ||
2279 | ||
2280 | struct window * | |
2281 | allocate_window () | |
2282 | { | |
2283 | EMACS_INT len = VECSIZE (struct window); | |
2284 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_WINDOW); | |
2285 | EMACS_INT i; | |
2286 | ||
2287 | for (i = 0; i < len; ++i) | |
2288 | v->contents[i] = Qnil; | |
2289 | v->size = len; | |
2290 | ||
2291 | return (struct window *) v; | |
2292 | } | |
2293 | ||
2294 | ||
2295 | struct frame * | |
2296 | allocate_frame () | |
2297 | { | |
2298 | EMACS_INT len = VECSIZE (struct frame); | |
2299 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_FRAME); | |
2300 | EMACS_INT i; | |
2301 | ||
2302 | for (i = 0; i < len; ++i) | |
2303 | v->contents[i] = make_number (0); | |
2304 | v->size = len; | |
2305 | return (struct frame *) v; | |
2306 | } | |
2307 | ||
2308 | ||
2309 | struct Lisp_Process * | |
2310 | allocate_process () | |
2311 | { | |
2312 | EMACS_INT len = VECSIZE (struct Lisp_Process); | |
2313 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_PROCESS); | |
2314 | EMACS_INT i; | |
2315 | ||
2316 | for (i = 0; i < len; ++i) | |
2317 | v->contents[i] = Qnil; | |
2318 | v->size = len; | |
2319 | ||
2320 | return (struct Lisp_Process *) v; | |
2321 | } | |
2322 | ||
2323 | ||
2324 | struct Lisp_Vector * | |
2325 | allocate_other_vector (len) | |
2326 | EMACS_INT len; | |
2327 | { | |
2328 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_VECTOR); | |
2329 | EMACS_INT i; | |
2330 | ||
2331 | for (i = 0; i < len; ++i) | |
2332 | v->contents[i] = Qnil; | |
2333 | v->size = len; | |
2334 | ||
2335 | return v; | |
2336 | } | |
2337 | ||
2338 | ||
7146af97 | 2339 | DEFUN ("make-vector", Fmake_vector, Smake_vector, 2, 2, 0, |
a6266d23 | 2340 | doc: /* Return a newly created vector of length LENGTH, with each element being INIT. |
7ee72033 MB |
2341 | See also the function `vector'. */) |
2342 | (length, init) | |
7146af97 JB |
2343 | register Lisp_Object length, init; |
2344 | { | |
1825c68d KH |
2345 | Lisp_Object vector; |
2346 | register EMACS_INT sizei; | |
2347 | register int index; | |
7146af97 JB |
2348 | register struct Lisp_Vector *p; |
2349 | ||
b7826503 | 2350 | CHECK_NATNUM (length); |
c9dad5ed | 2351 | sizei = XFASTINT (length); |
7146af97 | 2352 | |
ece93c02 | 2353 | p = allocate_vector (sizei); |
7146af97 JB |
2354 | for (index = 0; index < sizei; index++) |
2355 | p->contents[index] = init; | |
2356 | ||
1825c68d | 2357 | XSETVECTOR (vector, p); |
7146af97 JB |
2358 | return vector; |
2359 | } | |
2360 | ||
34400008 | 2361 | |
a59de17b | 2362 | DEFUN ("make-char-table", Fmake_char_table, Smake_char_table, 1, 2, 0, |
a6266d23 | 2363 | doc: /* Return a newly created char-table, with purpose PURPOSE. |
228299fa GM |
2364 | Each element is initialized to INIT, which defaults to nil. |
2365 | PURPOSE should be a symbol which has a `char-table-extra-slots' property. | |
7ee72033 MB |
2366 | The property's value should be an integer between 0 and 10. */) |
2367 | (purpose, init) | |
a59de17b | 2368 | register Lisp_Object purpose, init; |
7b07587b RS |
2369 | { |
2370 | Lisp_Object vector; | |
a59de17b | 2371 | Lisp_Object n; |
b7826503 | 2372 | CHECK_SYMBOL (purpose); |
0551bde3 | 2373 | n = Fget (purpose, Qchar_table_extra_slots); |
b7826503 | 2374 | CHECK_NUMBER (n); |
7b07587b RS |
2375 | if (XINT (n) < 0 || XINT (n) > 10) |
2376 | args_out_of_range (n, Qnil); | |
2377 | /* Add 2 to the size for the defalt and parent slots. */ | |
2378 | vector = Fmake_vector (make_number (CHAR_TABLE_STANDARD_SLOTS + XINT (n)), | |
2379 | init); | |
0551bde3 | 2380 | XCHAR_TABLE (vector)->top = Qt; |
c96a008c | 2381 | XCHAR_TABLE (vector)->parent = Qnil; |
a59de17b | 2382 | XCHAR_TABLE (vector)->purpose = purpose; |
7b07587b RS |
2383 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); |
2384 | return vector; | |
2385 | } | |
2386 | ||
34400008 | 2387 | |
0551bde3 KH |
2388 | /* Return a newly created sub char table with default value DEFALT. |
2389 | Since a sub char table does not appear as a top level Emacs Lisp | |
2390 | object, we don't need a Lisp interface to make it. */ | |
2391 | ||
2392 | Lisp_Object | |
2393 | make_sub_char_table (defalt) | |
2394 | Lisp_Object defalt; | |
2395 | { | |
2396 | Lisp_Object vector | |
2397 | = Fmake_vector (make_number (SUB_CHAR_TABLE_STANDARD_SLOTS), Qnil); | |
2398 | XCHAR_TABLE (vector)->top = Qnil; | |
2399 | XCHAR_TABLE (vector)->defalt = defalt; | |
2400 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); | |
2401 | return vector; | |
2402 | } | |
2403 | ||
34400008 | 2404 | |
7146af97 | 2405 | DEFUN ("vector", Fvector, Svector, 0, MANY, 0, |
eae936e2 | 2406 | doc: /* Return a newly created vector with specified arguments as elements. |
ae8e8122 MB |
2407 | Any number of arguments, even zero arguments, are allowed. |
2408 | usage: (vector &rest OBJECTS) */) | |
7ee72033 | 2409 | (nargs, args) |
7146af97 JB |
2410 | register int nargs; |
2411 | Lisp_Object *args; | |
2412 | { | |
2413 | register Lisp_Object len, val; | |
2414 | register int index; | |
2415 | register struct Lisp_Vector *p; | |
2416 | ||
67ba9986 | 2417 | XSETFASTINT (len, nargs); |
7146af97 JB |
2418 | val = Fmake_vector (len, Qnil); |
2419 | p = XVECTOR (val); | |
2420 | for (index = 0; index < nargs; index++) | |
2421 | p->contents[index] = args[index]; | |
2422 | return val; | |
2423 | } | |
2424 | ||
34400008 | 2425 | |
7146af97 | 2426 | DEFUN ("make-byte-code", Fmake_byte_code, Smake_byte_code, 4, MANY, 0, |
a6266d23 | 2427 | doc: /* Create a byte-code object with specified arguments as elements. |
228299fa GM |
2428 | The arguments should be the arglist, bytecode-string, constant vector, |
2429 | stack size, (optional) doc string, and (optional) interactive spec. | |
2430 | The first four arguments are required; at most six have any | |
ae8e8122 MB |
2431 | significance. |
2432 | usage: (make-byte-code &rest ELEMENTS) */) | |
7ee72033 | 2433 | (nargs, args) |
7146af97 JB |
2434 | register int nargs; |
2435 | Lisp_Object *args; | |
2436 | { | |
2437 | register Lisp_Object len, val; | |
2438 | register int index; | |
2439 | register struct Lisp_Vector *p; | |
2440 | ||
67ba9986 | 2441 | XSETFASTINT (len, nargs); |
265a9e55 | 2442 | if (!NILP (Vpurify_flag)) |
5a053ea9 | 2443 | val = make_pure_vector ((EMACS_INT) nargs); |
7146af97 JB |
2444 | else |
2445 | val = Fmake_vector (len, Qnil); | |
9eac9d59 KH |
2446 | |
2447 | if (STRINGP (args[1]) && STRING_MULTIBYTE (args[1])) | |
2448 | /* BYTECODE-STRING must have been produced by Emacs 20.2 or the | |
2449 | earlier because they produced a raw 8-bit string for byte-code | |
2450 | and now such a byte-code string is loaded as multibyte while | |
2451 | raw 8-bit characters converted to multibyte form. Thus, now we | |
2452 | must convert them back to the original unibyte form. */ | |
2453 | args[1] = Fstring_as_unibyte (args[1]); | |
2454 | ||
7146af97 JB |
2455 | p = XVECTOR (val); |
2456 | for (index = 0; index < nargs; index++) | |
2457 | { | |
265a9e55 | 2458 | if (!NILP (Vpurify_flag)) |
7146af97 JB |
2459 | args[index] = Fpurecopy (args[index]); |
2460 | p->contents[index] = args[index]; | |
2461 | } | |
50aee051 | 2462 | XSETCOMPILED (val, p); |
7146af97 JB |
2463 | return val; |
2464 | } | |
2e471eb5 | 2465 | |
34400008 | 2466 | |
7146af97 | 2467 | \f |
2e471eb5 GM |
2468 | /*********************************************************************** |
2469 | Symbol Allocation | |
2470 | ***********************************************************************/ | |
7146af97 | 2471 | |
2e471eb5 GM |
2472 | /* Each symbol_block is just under 1020 bytes long, since malloc |
2473 | really allocates in units of powers of two and uses 4 bytes for its | |
2474 | own overhead. */ | |
7146af97 JB |
2475 | |
2476 | #define SYMBOL_BLOCK_SIZE \ | |
2477 | ((1020 - sizeof (struct symbol_block *)) / sizeof (struct Lisp_Symbol)) | |
2478 | ||
2479 | struct symbol_block | |
2e471eb5 GM |
2480 | { |
2481 | struct symbol_block *next; | |
2482 | struct Lisp_Symbol symbols[SYMBOL_BLOCK_SIZE]; | |
2483 | }; | |
7146af97 | 2484 | |
34400008 GM |
2485 | /* Current symbol block and index of first unused Lisp_Symbol |
2486 | structure in it. */ | |
2487 | ||
7146af97 JB |
2488 | struct symbol_block *symbol_block; |
2489 | int symbol_block_index; | |
2490 | ||
34400008 GM |
2491 | /* List of free symbols. */ |
2492 | ||
7146af97 JB |
2493 | struct Lisp_Symbol *symbol_free_list; |
2494 | ||
c8099634 | 2495 | /* Total number of symbol blocks now in use. */ |
2e471eb5 | 2496 | |
c8099634 RS |
2497 | int n_symbol_blocks; |
2498 | ||
34400008 GM |
2499 | |
2500 | /* Initialize symbol allocation. */ | |
2501 | ||
7146af97 JB |
2502 | void |
2503 | init_symbol () | |
2504 | { | |
34400008 GM |
2505 | symbol_block = (struct symbol_block *) lisp_malloc (sizeof *symbol_block, |
2506 | MEM_TYPE_SYMBOL); | |
7146af97 | 2507 | symbol_block->next = 0; |
290c8f1e | 2508 | bzero ((char *) symbol_block->symbols, sizeof symbol_block->symbols); |
7146af97 JB |
2509 | symbol_block_index = 0; |
2510 | symbol_free_list = 0; | |
c8099634 | 2511 | n_symbol_blocks = 1; |
7146af97 JB |
2512 | } |
2513 | ||
34400008 | 2514 | |
7146af97 | 2515 | DEFUN ("make-symbol", Fmake_symbol, Smake_symbol, 1, 1, 0, |
a6266d23 | 2516 | doc: /* Return a newly allocated uninterned symbol whose name is NAME. |
7ee72033 MB |
2517 | Its value and function definition are void, and its property list is nil. */) |
2518 | (name) | |
54ee42dd | 2519 | Lisp_Object name; |
7146af97 JB |
2520 | { |
2521 | register Lisp_Object val; | |
2522 | register struct Lisp_Symbol *p; | |
2523 | ||
b7826503 | 2524 | CHECK_STRING (name); |
7146af97 JB |
2525 | |
2526 | if (symbol_free_list) | |
2527 | { | |
45d12a89 | 2528 | XSETSYMBOL (val, symbol_free_list); |
85481507 | 2529 | symbol_free_list = *(struct Lisp_Symbol **)&symbol_free_list->value; |
7146af97 JB |
2530 | } |
2531 | else | |
2532 | { | |
2533 | if (symbol_block_index == SYMBOL_BLOCK_SIZE) | |
2534 | { | |
3c06d205 | 2535 | struct symbol_block *new; |
34400008 GM |
2536 | new = (struct symbol_block *) lisp_malloc (sizeof *new, |
2537 | MEM_TYPE_SYMBOL); | |
7146af97 JB |
2538 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
2539 | new->next = symbol_block; | |
2540 | symbol_block = new; | |
2541 | symbol_block_index = 0; | |
c8099634 | 2542 | n_symbol_blocks++; |
7146af97 | 2543 | } |
45d12a89 | 2544 | XSETSYMBOL (val, &symbol_block->symbols[symbol_block_index++]); |
7146af97 | 2545 | } |
2e471eb5 | 2546 | |
7146af97 | 2547 | p = XSYMBOL (val); |
636b7260 | 2548 | p->name = XSTRING (name); |
7146af97 | 2549 | p->plist = Qnil; |
2e471eb5 GM |
2550 | p->value = Qunbound; |
2551 | p->function = Qunbound; | |
9e713715 GM |
2552 | p->next = NULL; |
2553 | p->interned = SYMBOL_UNINTERNED; | |
2554 | p->constant = 0; | |
2555 | p->indirect_variable = 0; | |
2e471eb5 GM |
2556 | consing_since_gc += sizeof (struct Lisp_Symbol); |
2557 | symbols_consed++; | |
7146af97 JB |
2558 | return val; |
2559 | } | |
2560 | ||
3f25e183 | 2561 | |
2e471eb5 GM |
2562 | \f |
2563 | /*********************************************************************** | |
34400008 | 2564 | Marker (Misc) Allocation |
2e471eb5 | 2565 | ***********************************************************************/ |
3f25e183 | 2566 | |
2e471eb5 GM |
2567 | /* Allocation of markers and other objects that share that structure. |
2568 | Works like allocation of conses. */ | |
c0696668 | 2569 | |
2e471eb5 GM |
2570 | #define MARKER_BLOCK_SIZE \ |
2571 | ((1020 - sizeof (struct marker_block *)) / sizeof (union Lisp_Misc)) | |
2572 | ||
2573 | struct marker_block | |
c0696668 | 2574 | { |
2e471eb5 GM |
2575 | struct marker_block *next; |
2576 | union Lisp_Misc markers[MARKER_BLOCK_SIZE]; | |
2577 | }; | |
c0696668 | 2578 | |
2e471eb5 GM |
2579 | struct marker_block *marker_block; |
2580 | int marker_block_index; | |
c0696668 | 2581 | |
2e471eb5 | 2582 | union Lisp_Misc *marker_free_list; |
c0696668 | 2583 | |
2e471eb5 | 2584 | /* Total number of marker blocks now in use. */ |
3f25e183 | 2585 | |
2e471eb5 GM |
2586 | int n_marker_blocks; |
2587 | ||
2588 | void | |
2589 | init_marker () | |
3f25e183 | 2590 | { |
34400008 GM |
2591 | marker_block = (struct marker_block *) lisp_malloc (sizeof *marker_block, |
2592 | MEM_TYPE_MISC); | |
2e471eb5 GM |
2593 | marker_block->next = 0; |
2594 | bzero ((char *) marker_block->markers, sizeof marker_block->markers); | |
2595 | marker_block_index = 0; | |
2596 | marker_free_list = 0; | |
2597 | n_marker_blocks = 1; | |
3f25e183 RS |
2598 | } |
2599 | ||
2e471eb5 GM |
2600 | /* Return a newly allocated Lisp_Misc object, with no substructure. */ |
2601 | ||
3f25e183 | 2602 | Lisp_Object |
2e471eb5 | 2603 | allocate_misc () |
7146af97 | 2604 | { |
2e471eb5 | 2605 | Lisp_Object val; |
7146af97 | 2606 | |
2e471eb5 | 2607 | if (marker_free_list) |
7146af97 | 2608 | { |
2e471eb5 GM |
2609 | XSETMISC (val, marker_free_list); |
2610 | marker_free_list = marker_free_list->u_free.chain; | |
7146af97 JB |
2611 | } |
2612 | else | |
7146af97 | 2613 | { |
2e471eb5 GM |
2614 | if (marker_block_index == MARKER_BLOCK_SIZE) |
2615 | { | |
2616 | struct marker_block *new; | |
34400008 GM |
2617 | new = (struct marker_block *) lisp_malloc (sizeof *new, |
2618 | MEM_TYPE_MISC); | |
2e471eb5 GM |
2619 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
2620 | new->next = marker_block; | |
2621 | marker_block = new; | |
2622 | marker_block_index = 0; | |
2623 | n_marker_blocks++; | |
2624 | } | |
2625 | XSETMISC (val, &marker_block->markers[marker_block_index++]); | |
7146af97 | 2626 | } |
2e471eb5 GM |
2627 | |
2628 | consing_since_gc += sizeof (union Lisp_Misc); | |
2629 | misc_objects_consed++; | |
2630 | return val; | |
2631 | } | |
2632 | ||
2633 | DEFUN ("make-marker", Fmake_marker, Smake_marker, 0, 0, 0, | |
a6266d23 | 2634 | doc: /* Return a newly allocated marker which does not point at any place. */) |
7ee72033 | 2635 | () |
2e471eb5 GM |
2636 | { |
2637 | register Lisp_Object val; | |
2638 | register struct Lisp_Marker *p; | |
7146af97 | 2639 | |
2e471eb5 GM |
2640 | val = allocate_misc (); |
2641 | XMISCTYPE (val) = Lisp_Misc_Marker; | |
2642 | p = XMARKER (val); | |
2643 | p->buffer = 0; | |
2644 | p->bytepos = 0; | |
2645 | p->charpos = 0; | |
2646 | p->chain = Qnil; | |
2647 | p->insertion_type = 0; | |
7146af97 JB |
2648 | return val; |
2649 | } | |
2e471eb5 GM |
2650 | |
2651 | /* Put MARKER back on the free list after using it temporarily. */ | |
2652 | ||
2653 | void | |
2654 | free_marker (marker) | |
2655 | Lisp_Object marker; | |
2656 | { | |
2657 | unchain_marker (marker); | |
2658 | ||
2659 | XMISC (marker)->u_marker.type = Lisp_Misc_Free; | |
2660 | XMISC (marker)->u_free.chain = marker_free_list; | |
2661 | marker_free_list = XMISC (marker); | |
2662 | ||
2663 | total_free_markers++; | |
2664 | } | |
2665 | ||
c0696668 | 2666 | \f |
7146af97 | 2667 | /* Return a newly created vector or string with specified arguments as |
736471d1 RS |
2668 | elements. If all the arguments are characters that can fit |
2669 | in a string of events, make a string; otherwise, make a vector. | |
2670 | ||
2671 | Any number of arguments, even zero arguments, are allowed. */ | |
7146af97 JB |
2672 | |
2673 | Lisp_Object | |
736471d1 | 2674 | make_event_array (nargs, args) |
7146af97 JB |
2675 | register int nargs; |
2676 | Lisp_Object *args; | |
2677 | { | |
2678 | int i; | |
2679 | ||
2680 | for (i = 0; i < nargs; i++) | |
736471d1 | 2681 | /* The things that fit in a string |
c9ca4659 RS |
2682 | are characters that are in 0...127, |
2683 | after discarding the meta bit and all the bits above it. */ | |
e687453f | 2684 | if (!INTEGERP (args[i]) |
c9ca4659 | 2685 | || (XUINT (args[i]) & ~(-CHAR_META)) >= 0200) |
7146af97 JB |
2686 | return Fvector (nargs, args); |
2687 | ||
2688 | /* Since the loop exited, we know that all the things in it are | |
2689 | characters, so we can make a string. */ | |
2690 | { | |
c13ccad2 | 2691 | Lisp_Object result; |
7146af97 | 2692 | |
50aee051 | 2693 | result = Fmake_string (make_number (nargs), make_number (0)); |
7146af97 | 2694 | for (i = 0; i < nargs; i++) |
736471d1 RS |
2695 | { |
2696 | XSTRING (result)->data[i] = XINT (args[i]); | |
2697 | /* Move the meta bit to the right place for a string char. */ | |
2698 | if (XINT (args[i]) & CHAR_META) | |
2699 | XSTRING (result)->data[i] |= 0x80; | |
2700 | } | |
7146af97 JB |
2701 | |
2702 | return result; | |
2703 | } | |
2704 | } | |
2e471eb5 GM |
2705 | |
2706 | ||
7146af97 | 2707 | \f |
34400008 GM |
2708 | /************************************************************************ |
2709 | C Stack Marking | |
2710 | ************************************************************************/ | |
2711 | ||
13c844fb GM |
2712 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
2713 | ||
71cf5fa0 GM |
2714 | /* Conservative C stack marking requires a method to identify possibly |
2715 | live Lisp objects given a pointer value. We do this by keeping | |
2716 | track of blocks of Lisp data that are allocated in a red-black tree | |
2717 | (see also the comment of mem_node which is the type of nodes in | |
2718 | that tree). Function lisp_malloc adds information for an allocated | |
2719 | block to the red-black tree with calls to mem_insert, and function | |
2720 | lisp_free removes it with mem_delete. Functions live_string_p etc | |
2721 | call mem_find to lookup information about a given pointer in the | |
2722 | tree, and use that to determine if the pointer points to a Lisp | |
2723 | object or not. */ | |
2724 | ||
34400008 GM |
2725 | /* Initialize this part of alloc.c. */ |
2726 | ||
2727 | static void | |
2728 | mem_init () | |
2729 | { | |
2730 | mem_z.left = mem_z.right = MEM_NIL; | |
2731 | mem_z.parent = NULL; | |
2732 | mem_z.color = MEM_BLACK; | |
2733 | mem_z.start = mem_z.end = NULL; | |
2734 | mem_root = MEM_NIL; | |
2735 | } | |
2736 | ||
2737 | ||
2738 | /* Value is a pointer to the mem_node containing START. Value is | |
2739 | MEM_NIL if there is no node in the tree containing START. */ | |
2740 | ||
2741 | static INLINE struct mem_node * | |
2742 | mem_find (start) | |
2743 | void *start; | |
2744 | { | |
2745 | struct mem_node *p; | |
2746 | ||
ece93c02 GM |
2747 | if (start < min_heap_address || start > max_heap_address) |
2748 | return MEM_NIL; | |
2749 | ||
34400008 GM |
2750 | /* Make the search always successful to speed up the loop below. */ |
2751 | mem_z.start = start; | |
2752 | mem_z.end = (char *) start + 1; | |
2753 | ||
2754 | p = mem_root; | |
2755 | while (start < p->start || start >= p->end) | |
2756 | p = start < p->start ? p->left : p->right; | |
2757 | return p; | |
2758 | } | |
2759 | ||
2760 | ||
2761 | /* Insert a new node into the tree for a block of memory with start | |
2762 | address START, end address END, and type TYPE. Value is a | |
2763 | pointer to the node that was inserted. */ | |
2764 | ||
2765 | static struct mem_node * | |
2766 | mem_insert (start, end, type) | |
2767 | void *start, *end; | |
2768 | enum mem_type type; | |
2769 | { | |
2770 | struct mem_node *c, *parent, *x; | |
2771 | ||
ece93c02 GM |
2772 | if (start < min_heap_address) |
2773 | min_heap_address = start; | |
2774 | if (end > max_heap_address) | |
2775 | max_heap_address = end; | |
2776 | ||
34400008 GM |
2777 | /* See where in the tree a node for START belongs. In this |
2778 | particular application, it shouldn't happen that a node is already | |
2779 | present. For debugging purposes, let's check that. */ | |
2780 | c = mem_root; | |
2781 | parent = NULL; | |
2782 | ||
2783 | #if GC_MARK_STACK != GC_MAKE_GCPROS_NOOPS | |
2784 | ||
2785 | while (c != MEM_NIL) | |
2786 | { | |
2787 | if (start >= c->start && start < c->end) | |
2788 | abort (); | |
2789 | parent = c; | |
2790 | c = start < c->start ? c->left : c->right; | |
2791 | } | |
2792 | ||
2793 | #else /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ | |
2794 | ||
2795 | while (c != MEM_NIL) | |
2796 | { | |
2797 | parent = c; | |
2798 | c = start < c->start ? c->left : c->right; | |
2799 | } | |
2800 | ||
2801 | #endif /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ | |
2802 | ||
2803 | /* Create a new node. */ | |
877935b1 GM |
2804 | #ifdef GC_MALLOC_CHECK |
2805 | x = (struct mem_node *) _malloc_internal (sizeof *x); | |
2806 | if (x == NULL) | |
2807 | abort (); | |
2808 | #else | |
34400008 | 2809 | x = (struct mem_node *) xmalloc (sizeof *x); |
877935b1 | 2810 | #endif |
34400008 GM |
2811 | x->start = start; |
2812 | x->end = end; | |
2813 | x->type = type; | |
2814 | x->parent = parent; | |
2815 | x->left = x->right = MEM_NIL; | |
2816 | x->color = MEM_RED; | |
2817 | ||
2818 | /* Insert it as child of PARENT or install it as root. */ | |
2819 | if (parent) | |
2820 | { | |
2821 | if (start < parent->start) | |
2822 | parent->left = x; | |
2823 | else | |
2824 | parent->right = x; | |
2825 | } | |
2826 | else | |
2827 | mem_root = x; | |
2828 | ||
2829 | /* Re-establish red-black tree properties. */ | |
2830 | mem_insert_fixup (x); | |
877935b1 | 2831 | |
34400008 GM |
2832 | return x; |
2833 | } | |
2834 | ||
2835 | ||
2836 | /* Re-establish the red-black properties of the tree, and thereby | |
2837 | balance the tree, after node X has been inserted; X is always red. */ | |
2838 | ||
2839 | static void | |
2840 | mem_insert_fixup (x) | |
2841 | struct mem_node *x; | |
2842 | { | |
2843 | while (x != mem_root && x->parent->color == MEM_RED) | |
2844 | { | |
2845 | /* X is red and its parent is red. This is a violation of | |
2846 | red-black tree property #3. */ | |
2847 | ||
2848 | if (x->parent == x->parent->parent->left) | |
2849 | { | |
2850 | /* We're on the left side of our grandparent, and Y is our | |
2851 | "uncle". */ | |
2852 | struct mem_node *y = x->parent->parent->right; | |
2853 | ||
2854 | if (y->color == MEM_RED) | |
2855 | { | |
2856 | /* Uncle and parent are red but should be black because | |
2857 | X is red. Change the colors accordingly and proceed | |
2858 | with the grandparent. */ | |
2859 | x->parent->color = MEM_BLACK; | |
2860 | y->color = MEM_BLACK; | |
2861 | x->parent->parent->color = MEM_RED; | |
2862 | x = x->parent->parent; | |
2863 | } | |
2864 | else | |
2865 | { | |
2866 | /* Parent and uncle have different colors; parent is | |
2867 | red, uncle is black. */ | |
2868 | if (x == x->parent->right) | |
2869 | { | |
2870 | x = x->parent; | |
2871 | mem_rotate_left (x); | |
2872 | } | |
2873 | ||
2874 | x->parent->color = MEM_BLACK; | |
2875 | x->parent->parent->color = MEM_RED; | |
2876 | mem_rotate_right (x->parent->parent); | |
2877 | } | |
2878 | } | |
2879 | else | |
2880 | { | |
2881 | /* This is the symmetrical case of above. */ | |
2882 | struct mem_node *y = x->parent->parent->left; | |
2883 | ||
2884 | if (y->color == MEM_RED) | |
2885 | { | |
2886 | x->parent->color = MEM_BLACK; | |
2887 | y->color = MEM_BLACK; | |
2888 | x->parent->parent->color = MEM_RED; | |
2889 | x = x->parent->parent; | |
2890 | } | |
2891 | else | |
2892 | { | |
2893 | if (x == x->parent->left) | |
2894 | { | |
2895 | x = x->parent; | |
2896 | mem_rotate_right (x); | |
2897 | } | |
2898 | ||
2899 | x->parent->color = MEM_BLACK; | |
2900 | x->parent->parent->color = MEM_RED; | |
2901 | mem_rotate_left (x->parent->parent); | |
2902 | } | |
2903 | } | |
2904 | } | |
2905 | ||
2906 | /* The root may have been changed to red due to the algorithm. Set | |
2907 | it to black so that property #5 is satisfied. */ | |
2908 | mem_root->color = MEM_BLACK; | |
2909 | } | |
2910 | ||
2911 | ||
2912 | /* (x) (y) | |
2913 | / \ / \ | |
2914 | a (y) ===> (x) c | |
2915 | / \ / \ | |
2916 | b c a b */ | |
2917 | ||
2918 | static void | |
2919 | mem_rotate_left (x) | |
2920 | struct mem_node *x; | |
2921 | { | |
2922 | struct mem_node *y; | |
2923 | ||
2924 | /* Turn y's left sub-tree into x's right sub-tree. */ | |
2925 | y = x->right; | |
2926 | x->right = y->left; | |
2927 | if (y->left != MEM_NIL) | |
2928 | y->left->parent = x; | |
2929 | ||
2930 | /* Y's parent was x's parent. */ | |
2931 | if (y != MEM_NIL) | |
2932 | y->parent = x->parent; | |
2933 | ||
2934 | /* Get the parent to point to y instead of x. */ | |
2935 | if (x->parent) | |
2936 | { | |
2937 | if (x == x->parent->left) | |
2938 | x->parent->left = y; | |
2939 | else | |
2940 | x->parent->right = y; | |
2941 | } | |
2942 | else | |
2943 | mem_root = y; | |
2944 | ||
2945 | /* Put x on y's left. */ | |
2946 | y->left = x; | |
2947 | if (x != MEM_NIL) | |
2948 | x->parent = y; | |
2949 | } | |
2950 | ||
2951 | ||
2952 | /* (x) (Y) | |
2953 | / \ / \ | |
2954 | (y) c ===> a (x) | |
2955 | / \ / \ | |
2956 | a b b c */ | |
2957 | ||
2958 | static void | |
2959 | mem_rotate_right (x) | |
2960 | struct mem_node *x; | |
2961 | { | |
2962 | struct mem_node *y = x->left; | |
2963 | ||
2964 | x->left = y->right; | |
2965 | if (y->right != MEM_NIL) | |
2966 | y->right->parent = x; | |
2967 | ||
2968 | if (y != MEM_NIL) | |
2969 | y->parent = x->parent; | |
2970 | if (x->parent) | |
2971 | { | |
2972 | if (x == x->parent->right) | |
2973 | x->parent->right = y; | |
2974 | else | |
2975 | x->parent->left = y; | |
2976 | } | |
2977 | else | |
2978 | mem_root = y; | |
2979 | ||
2980 | y->right = x; | |
2981 | if (x != MEM_NIL) | |
2982 | x->parent = y; | |
2983 | } | |
2984 | ||
2985 | ||
2986 | /* Delete node Z from the tree. If Z is null or MEM_NIL, do nothing. */ | |
2987 | ||
2988 | static void | |
2989 | mem_delete (z) | |
2990 | struct mem_node *z; | |
2991 | { | |
2992 | struct mem_node *x, *y; | |
2993 | ||
2994 | if (!z || z == MEM_NIL) | |
2995 | return; | |
2996 | ||
2997 | if (z->left == MEM_NIL || z->right == MEM_NIL) | |
2998 | y = z; | |
2999 | else | |
3000 | { | |
3001 | y = z->right; | |
3002 | while (y->left != MEM_NIL) | |
3003 | y = y->left; | |
3004 | } | |
3005 | ||
3006 | if (y->left != MEM_NIL) | |
3007 | x = y->left; | |
3008 | else | |
3009 | x = y->right; | |
3010 | ||
3011 | x->parent = y->parent; | |
3012 | if (y->parent) | |
3013 | { | |
3014 | if (y == y->parent->left) | |
3015 | y->parent->left = x; | |
3016 | else | |
3017 | y->parent->right = x; | |
3018 | } | |
3019 | else | |
3020 | mem_root = x; | |
3021 | ||
3022 | if (y != z) | |
3023 | { | |
3024 | z->start = y->start; | |
3025 | z->end = y->end; | |
3026 | z->type = y->type; | |
3027 | } | |
3028 | ||
3029 | if (y->color == MEM_BLACK) | |
3030 | mem_delete_fixup (x); | |
877935b1 GM |
3031 | |
3032 | #ifdef GC_MALLOC_CHECK | |
3033 | _free_internal (y); | |
3034 | #else | |
34400008 | 3035 | xfree (y); |
877935b1 | 3036 | #endif |
34400008 GM |
3037 | } |
3038 | ||
3039 | ||
3040 | /* Re-establish the red-black properties of the tree, after a | |
3041 | deletion. */ | |
3042 | ||
3043 | static void | |
3044 | mem_delete_fixup (x) | |
3045 | struct mem_node *x; | |
3046 | { | |
3047 | while (x != mem_root && x->color == MEM_BLACK) | |
3048 | { | |
3049 | if (x == x->parent->left) | |
3050 | { | |
3051 | struct mem_node *w = x->parent->right; | |
3052 | ||
3053 | if (w->color == MEM_RED) | |
3054 | { | |
3055 | w->color = MEM_BLACK; | |
3056 | x->parent->color = MEM_RED; | |
3057 | mem_rotate_left (x->parent); | |
3058 | w = x->parent->right; | |
3059 | } | |
3060 | ||
3061 | if (w->left->color == MEM_BLACK && w->right->color == MEM_BLACK) | |
3062 | { | |
3063 | w->color = MEM_RED; | |
3064 | x = x->parent; | |
3065 | } | |
3066 | else | |
3067 | { | |
3068 | if (w->right->color == MEM_BLACK) | |
3069 | { | |
3070 | w->left->color = MEM_BLACK; | |
3071 | w->color = MEM_RED; | |
3072 | mem_rotate_right (w); | |
3073 | w = x->parent->right; | |
3074 | } | |
3075 | w->color = x->parent->color; | |
3076 | x->parent->color = MEM_BLACK; | |
3077 | w->right->color = MEM_BLACK; | |
3078 | mem_rotate_left (x->parent); | |
3079 | x = mem_root; | |
3080 | } | |
3081 | } | |
3082 | else | |
3083 | { | |
3084 | struct mem_node *w = x->parent->left; | |
3085 | ||
3086 | if (w->color == MEM_RED) | |
3087 | { | |
3088 | w->color = MEM_BLACK; | |
3089 | x->parent->color = MEM_RED; | |
3090 | mem_rotate_right (x->parent); | |
3091 | w = x->parent->left; | |
3092 | } | |
3093 | ||
3094 | if (w->right->color == MEM_BLACK && w->left->color == MEM_BLACK) | |
3095 | { | |
3096 | w->color = MEM_RED; | |
3097 | x = x->parent; | |
3098 | } | |
3099 | else | |
3100 | { | |
3101 | if (w->left->color == MEM_BLACK) | |
3102 | { | |
3103 | w->right->color = MEM_BLACK; | |
3104 | w->color = MEM_RED; | |
3105 | mem_rotate_left (w); | |
3106 | w = x->parent->left; | |
3107 | } | |
3108 | ||
3109 | w->color = x->parent->color; | |
3110 | x->parent->color = MEM_BLACK; | |
3111 | w->left->color = MEM_BLACK; | |
3112 | mem_rotate_right (x->parent); | |
3113 | x = mem_root; | |
3114 | } | |
3115 | } | |
3116 | } | |
3117 | ||
3118 | x->color = MEM_BLACK; | |
3119 | } | |
3120 | ||
3121 | ||
3122 | /* Value is non-zero if P is a pointer to a live Lisp string on | |
3123 | the heap. M is a pointer to the mem_block for P. */ | |
3124 | ||
3125 | static INLINE int | |
3126 | live_string_p (m, p) | |
3127 | struct mem_node *m; | |
3128 | void *p; | |
3129 | { | |
3130 | if (m->type == MEM_TYPE_STRING) | |
3131 | { | |
3132 | struct string_block *b = (struct string_block *) m->start; | |
3133 | int offset = (char *) p - (char *) &b->strings[0]; | |
3134 | ||
3135 | /* P must point to the start of a Lisp_String structure, and it | |
3136 | must not be on the free-list. */ | |
176bc847 GM |
3137 | return (offset >= 0 |
3138 | && offset % sizeof b->strings[0] == 0 | |
34400008 GM |
3139 | && ((struct Lisp_String *) p)->data != NULL); |
3140 | } | |
3141 | else | |
3142 | return 0; | |
3143 | } | |
3144 | ||
3145 | ||
3146 | /* Value is non-zero if P is a pointer to a live Lisp cons on | |
3147 | the heap. M is a pointer to the mem_block for P. */ | |
3148 | ||
3149 | static INLINE int | |
3150 | live_cons_p (m, p) | |
3151 | struct mem_node *m; | |
3152 | void *p; | |
3153 | { | |
3154 | if (m->type == MEM_TYPE_CONS) | |
3155 | { | |
3156 | struct cons_block *b = (struct cons_block *) m->start; | |
3157 | int offset = (char *) p - (char *) &b->conses[0]; | |
3158 | ||
3159 | /* P must point to the start of a Lisp_Cons, not be | |
3160 | one of the unused cells in the current cons block, | |
3161 | and not be on the free-list. */ | |
176bc847 GM |
3162 | return (offset >= 0 |
3163 | && offset % sizeof b->conses[0] == 0 | |
34400008 GM |
3164 | && (b != cons_block |
3165 | || offset / sizeof b->conses[0] < cons_block_index) | |
3166 | && !EQ (((struct Lisp_Cons *) p)->car, Vdead)); | |
3167 | } | |
3168 | else | |
3169 | return 0; | |
3170 | } | |
3171 | ||
3172 | ||
3173 | /* Value is non-zero if P is a pointer to a live Lisp symbol on | |
3174 | the heap. M is a pointer to the mem_block for P. */ | |
3175 | ||
3176 | static INLINE int | |
3177 | live_symbol_p (m, p) | |
3178 | struct mem_node *m; | |
3179 | void *p; | |
3180 | { | |
3181 | if (m->type == MEM_TYPE_SYMBOL) | |
3182 | { | |
3183 | struct symbol_block *b = (struct symbol_block *) m->start; | |
3184 | int offset = (char *) p - (char *) &b->symbols[0]; | |
3185 | ||
3186 | /* P must point to the start of a Lisp_Symbol, not be | |
3187 | one of the unused cells in the current symbol block, | |
3188 | and not be on the free-list. */ | |
176bc847 GM |
3189 | return (offset >= 0 |
3190 | && offset % sizeof b->symbols[0] == 0 | |
34400008 GM |
3191 | && (b != symbol_block |
3192 | || offset / sizeof b->symbols[0] < symbol_block_index) | |
3193 | && !EQ (((struct Lisp_Symbol *) p)->function, Vdead)); | |
3194 | } | |
3195 | else | |
3196 | return 0; | |
3197 | } | |
3198 | ||
3199 | ||
3200 | /* Value is non-zero if P is a pointer to a live Lisp float on | |
3201 | the heap. M is a pointer to the mem_block for P. */ | |
3202 | ||
3203 | static INLINE int | |
3204 | live_float_p (m, p) | |
3205 | struct mem_node *m; | |
3206 | void *p; | |
3207 | { | |
3208 | if (m->type == MEM_TYPE_FLOAT) | |
3209 | { | |
3210 | struct float_block *b = (struct float_block *) m->start; | |
3211 | int offset = (char *) p - (char *) &b->floats[0]; | |
3212 | ||
3213 | /* P must point to the start of a Lisp_Float, not be | |
3214 | one of the unused cells in the current float block, | |
3215 | and not be on the free-list. */ | |
176bc847 GM |
3216 | return (offset >= 0 |
3217 | && offset % sizeof b->floats[0] == 0 | |
34400008 GM |
3218 | && (b != float_block |
3219 | || offset / sizeof b->floats[0] < float_block_index) | |
3220 | && !EQ (((struct Lisp_Float *) p)->type, Vdead)); | |
3221 | } | |
3222 | else | |
3223 | return 0; | |
3224 | } | |
3225 | ||
3226 | ||
3227 | /* Value is non-zero if P is a pointer to a live Lisp Misc on | |
3228 | the heap. M is a pointer to the mem_block for P. */ | |
3229 | ||
3230 | static INLINE int | |
3231 | live_misc_p (m, p) | |
3232 | struct mem_node *m; | |
3233 | void *p; | |
3234 | { | |
3235 | if (m->type == MEM_TYPE_MISC) | |
3236 | { | |
3237 | struct marker_block *b = (struct marker_block *) m->start; | |
3238 | int offset = (char *) p - (char *) &b->markers[0]; | |
3239 | ||
3240 | /* P must point to the start of a Lisp_Misc, not be | |
3241 | one of the unused cells in the current misc block, | |
3242 | and not be on the free-list. */ | |
176bc847 GM |
3243 | return (offset >= 0 |
3244 | && offset % sizeof b->markers[0] == 0 | |
34400008 GM |
3245 | && (b != marker_block |
3246 | || offset / sizeof b->markers[0] < marker_block_index) | |
3247 | && ((union Lisp_Misc *) p)->u_marker.type != Lisp_Misc_Free); | |
3248 | } | |
3249 | else | |
3250 | return 0; | |
3251 | } | |
3252 | ||
3253 | ||
3254 | /* Value is non-zero if P is a pointer to a live vector-like object. | |
3255 | M is a pointer to the mem_block for P. */ | |
3256 | ||
3257 | static INLINE int | |
3258 | live_vector_p (m, p) | |
3259 | struct mem_node *m; | |
3260 | void *p; | |
3261 | { | |
ece93c02 GM |
3262 | return (p == m->start |
3263 | && m->type >= MEM_TYPE_VECTOR | |
3264 | && m->type <= MEM_TYPE_WINDOW); | |
34400008 GM |
3265 | } |
3266 | ||
3267 | ||
3268 | /* Value is non-zero of P is a pointer to a live buffer. M is a | |
3269 | pointer to the mem_block for P. */ | |
3270 | ||
3271 | static INLINE int | |
3272 | live_buffer_p (m, p) | |
3273 | struct mem_node *m; | |
3274 | void *p; | |
3275 | { | |
3276 | /* P must point to the start of the block, and the buffer | |
3277 | must not have been killed. */ | |
3278 | return (m->type == MEM_TYPE_BUFFER | |
3279 | && p == m->start | |
3280 | && !NILP (((struct buffer *) p)->name)); | |
3281 | } | |
3282 | ||
13c844fb GM |
3283 | #endif /* GC_MARK_STACK || defined GC_MALLOC_CHECK */ |
3284 | ||
3285 | #if GC_MARK_STACK | |
3286 | ||
34400008 GM |
3287 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
3288 | ||
3289 | /* Array of objects that are kept alive because the C stack contains | |
3290 | a pattern that looks like a reference to them . */ | |
3291 | ||
3292 | #define MAX_ZOMBIES 10 | |
3293 | static Lisp_Object zombies[MAX_ZOMBIES]; | |
3294 | ||
3295 | /* Number of zombie objects. */ | |
3296 | ||
3297 | static int nzombies; | |
3298 | ||
3299 | /* Number of garbage collections. */ | |
3300 | ||
3301 | static int ngcs; | |
3302 | ||
3303 | /* Average percentage of zombies per collection. */ | |
3304 | ||
3305 | static double avg_zombies; | |
3306 | ||
3307 | /* Max. number of live and zombie objects. */ | |
3308 | ||
3309 | static int max_live, max_zombies; | |
3310 | ||
3311 | /* Average number of live objects per GC. */ | |
3312 | ||
3313 | static double avg_live; | |
3314 | ||
3315 | DEFUN ("gc-status", Fgc_status, Sgc_status, 0, 0, "", | |
7ee72033 MB |
3316 | doc: /* Show information about live and zombie objects. */) |
3317 | () | |
34400008 GM |
3318 | { |
3319 | Lisp_Object args[7]; | |
3320 | args[0] = build_string ("%d GCs, avg live/zombies = %.2f/%.2f (%f%%), max %d/%d"); | |
3321 | args[1] = make_number (ngcs); | |
3322 | args[2] = make_float (avg_live); | |
3323 | args[3] = make_float (avg_zombies); | |
3324 | args[4] = make_float (avg_zombies / avg_live / 100); | |
3325 | args[5] = make_number (max_live); | |
3326 | args[6] = make_number (max_zombies); | |
3327 | return Fmessage (7, args); | |
3328 | } | |
3329 | ||
3330 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
3331 | ||
3332 | ||
182ff242 GM |
3333 | /* Mark OBJ if we can prove it's a Lisp_Object. */ |
3334 | ||
3335 | static INLINE void | |
3336 | mark_maybe_object (obj) | |
3337 | Lisp_Object obj; | |
3338 | { | |
3339 | void *po = (void *) XPNTR (obj); | |
3340 | struct mem_node *m = mem_find (po); | |
3341 | ||
3342 | if (m != MEM_NIL) | |
3343 | { | |
3344 | int mark_p = 0; | |
3345 | ||
3346 | switch (XGCTYPE (obj)) | |
3347 | { | |
3348 | case Lisp_String: | |
3349 | mark_p = (live_string_p (m, po) | |
3350 | && !STRING_MARKED_P ((struct Lisp_String *) po)); | |
3351 | break; | |
3352 | ||
3353 | case Lisp_Cons: | |
3354 | mark_p = (live_cons_p (m, po) | |
3355 | && !XMARKBIT (XCONS (obj)->car)); | |
3356 | break; | |
3357 | ||
3358 | case Lisp_Symbol: | |
3359 | mark_p = (live_symbol_p (m, po) | |
3360 | && !XMARKBIT (XSYMBOL (obj)->plist)); | |
3361 | break; | |
3362 | ||
3363 | case Lisp_Float: | |
3364 | mark_p = (live_float_p (m, po) | |
3365 | && !XMARKBIT (XFLOAT (obj)->type)); | |
3366 | break; | |
3367 | ||
3368 | case Lisp_Vectorlike: | |
3369 | /* Note: can't check GC_BUFFERP before we know it's a | |
3370 | buffer because checking that dereferences the pointer | |
3371 | PO which might point anywhere. */ | |
3372 | if (live_vector_p (m, po)) | |
3373 | mark_p = (!GC_SUBRP (obj) | |
3374 | && !(XVECTOR (obj)->size & ARRAY_MARK_FLAG)); | |
3375 | else if (live_buffer_p (m, po)) | |
3376 | mark_p = GC_BUFFERP (obj) && !XMARKBIT (XBUFFER (obj)->name); | |
3377 | break; | |
3378 | ||
3379 | case Lisp_Misc: | |
3380 | if (live_misc_p (m, po)) | |
3381 | { | |
3382 | switch (XMISCTYPE (obj)) | |
3383 | { | |
3384 | case Lisp_Misc_Marker: | |
3385 | mark_p = !XMARKBIT (XMARKER (obj)->chain); | |
3386 | break; | |
3387 | ||
3388 | case Lisp_Misc_Buffer_Local_Value: | |
3389 | case Lisp_Misc_Some_Buffer_Local_Value: | |
3390 | mark_p = !XMARKBIT (XBUFFER_LOCAL_VALUE (obj)->realvalue); | |
3391 | break; | |
3392 | ||
3393 | case Lisp_Misc_Overlay: | |
3394 | mark_p = !XMARKBIT (XOVERLAY (obj)->plist); | |
3395 | break; | |
3396 | } | |
3397 | } | |
3398 | break; | |
6bbd7a29 GM |
3399 | |
3400 | case Lisp_Int: | |
31d929e5 | 3401 | case Lisp_Type_Limit: |
6bbd7a29 | 3402 | break; |
182ff242 GM |
3403 | } |
3404 | ||
3405 | if (mark_p) | |
3406 | { | |
3407 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
3408 | if (nzombies < MAX_ZOMBIES) | |
3409 | zombies[nzombies] = *p; | |
3410 | ++nzombies; | |
3411 | #endif | |
3412 | mark_object (&obj); | |
3413 | } | |
3414 | } | |
3415 | } | |
ece93c02 GM |
3416 | |
3417 | ||
3418 | /* If P points to Lisp data, mark that as live if it isn't already | |
3419 | marked. */ | |
3420 | ||
3421 | static INLINE void | |
3422 | mark_maybe_pointer (p) | |
3423 | void *p; | |
3424 | { | |
3425 | struct mem_node *m; | |
3426 | ||
3427 | /* Quickly rule out some values which can't point to Lisp data. We | |
3428 | assume that Lisp data is aligned on even addresses. */ | |
3429 | if ((EMACS_INT) p & 1) | |
3430 | return; | |
3431 | ||
3432 | m = mem_find (p); | |
3433 | if (m != MEM_NIL) | |
3434 | { | |
3435 | Lisp_Object obj = Qnil; | |
3436 | ||
3437 | switch (m->type) | |
3438 | { | |
3439 | case MEM_TYPE_NON_LISP: | |
2fe50224 | 3440 | /* Nothing to do; not a pointer to Lisp memory. */ |
ece93c02 GM |
3441 | break; |
3442 | ||
3443 | case MEM_TYPE_BUFFER: | |
3444 | if (live_buffer_p (m, p) | |
3445 | && !XMARKBIT (((struct buffer *) p)->name)) | |
3446 | XSETVECTOR (obj, p); | |
3447 | break; | |
3448 | ||
3449 | case MEM_TYPE_CONS: | |
3450 | if (live_cons_p (m, p) | |
3451 | && !XMARKBIT (((struct Lisp_Cons *) p)->car)) | |
3452 | XSETCONS (obj, p); | |
3453 | break; | |
3454 | ||
3455 | case MEM_TYPE_STRING: | |
3456 | if (live_string_p (m, p) | |
3457 | && !STRING_MARKED_P ((struct Lisp_String *) p)) | |
3458 | XSETSTRING (obj, p); | |
3459 | break; | |
3460 | ||
3461 | case MEM_TYPE_MISC: | |
3462 | if (live_misc_p (m, p)) | |
3463 | { | |
3464 | Lisp_Object tem; | |
3465 | XSETMISC (tem, p); | |
3466 | ||
3467 | switch (XMISCTYPE (tem)) | |
3468 | { | |
3469 | case Lisp_Misc_Marker: | |
3470 | if (!XMARKBIT (XMARKER (tem)->chain)) | |
3471 | obj = tem; | |
3472 | break; | |
3473 | ||
3474 | case Lisp_Misc_Buffer_Local_Value: | |
3475 | case Lisp_Misc_Some_Buffer_Local_Value: | |
3476 | if (!XMARKBIT (XBUFFER_LOCAL_VALUE (tem)->realvalue)) | |
3477 | obj = tem; | |
3478 | break; | |
3479 | ||
3480 | case Lisp_Misc_Overlay: | |
3481 | if (!XMARKBIT (XOVERLAY (tem)->plist)) | |
3482 | obj = tem; | |
3483 | break; | |
3484 | } | |
3485 | } | |
3486 | break; | |
182ff242 | 3487 | |
ece93c02 GM |
3488 | case MEM_TYPE_SYMBOL: |
3489 | if (live_symbol_p (m, p) | |
3490 | && !XMARKBIT (((struct Lisp_Symbol *) p)->plist)) | |
3491 | XSETSYMBOL (obj, p); | |
3492 | break; | |
3493 | ||
3494 | case MEM_TYPE_FLOAT: | |
3495 | if (live_float_p (m, p) | |
3496 | && !XMARKBIT (((struct Lisp_Float *) p)->type)) | |
3497 | XSETFLOAT (obj, p); | |
3498 | break; | |
3499 | ||
3500 | case MEM_TYPE_VECTOR: | |
3501 | case MEM_TYPE_PROCESS: | |
3502 | case MEM_TYPE_HASH_TABLE: | |
3503 | case MEM_TYPE_FRAME: | |
3504 | case MEM_TYPE_WINDOW: | |
3505 | if (live_vector_p (m, p)) | |
3506 | { | |
3507 | Lisp_Object tem; | |
3508 | XSETVECTOR (tem, p); | |
3509 | if (!GC_SUBRP (tem) | |
3510 | && !(XVECTOR (tem)->size & ARRAY_MARK_FLAG)) | |
3511 | obj = tem; | |
3512 | } | |
3513 | break; | |
3514 | ||
3515 | default: | |
3516 | abort (); | |
3517 | } | |
3518 | ||
3519 | if (!GC_NILP (obj)) | |
3520 | mark_object (&obj); | |
3521 | } | |
3522 | } | |
3523 | ||
3524 | ||
3525 | /* Mark Lisp objects referenced from the address range START..END. */ | |
34400008 GM |
3526 | |
3527 | static void | |
3528 | mark_memory (start, end) | |
3529 | void *start, *end; | |
3530 | { | |
3531 | Lisp_Object *p; | |
ece93c02 | 3532 | void **pp; |
34400008 GM |
3533 | |
3534 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
3535 | nzombies = 0; | |
3536 | #endif | |
3537 | ||
3538 | /* Make START the pointer to the start of the memory region, | |
3539 | if it isn't already. */ | |
3540 | if (end < start) | |
3541 | { | |
3542 | void *tem = start; | |
3543 | start = end; | |
3544 | end = tem; | |
3545 | } | |
ece93c02 GM |
3546 | |
3547 | /* Mark Lisp_Objects. */ | |
34400008 | 3548 | for (p = (Lisp_Object *) start; (void *) p < end; ++p) |
182ff242 | 3549 | mark_maybe_object (*p); |
ece93c02 GM |
3550 | |
3551 | /* Mark Lisp data pointed to. This is necessary because, in some | |
3552 | situations, the C compiler optimizes Lisp objects away, so that | |
3553 | only a pointer to them remains. Example: | |
3554 | ||
3555 | DEFUN ("testme", Ftestme, Stestme, 0, 0, 0, "") | |
7ee72033 | 3556 | () |
ece93c02 GM |
3557 | { |
3558 | Lisp_Object obj = build_string ("test"); | |
3559 | struct Lisp_String *s = XSTRING (obj); | |
3560 | Fgarbage_collect (); | |
3561 | fprintf (stderr, "test `%s'\n", s->data); | |
3562 | return Qnil; | |
3563 | } | |
3564 | ||
3565 | Here, `obj' isn't really used, and the compiler optimizes it | |
3566 | away. The only reference to the life string is through the | |
3567 | pointer `s'. */ | |
3568 | ||
3569 | for (pp = (void **) start; (void *) pp < end; ++pp) | |
3570 | mark_maybe_pointer (*pp); | |
182ff242 GM |
3571 | } |
3572 | ||
3573 | ||
3574 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
3575 | ||
3576 | static int setjmp_tested_p, longjmps_done; | |
3577 | ||
3578 | #define SETJMP_WILL_LIKELY_WORK "\ | |
3579 | \n\ | |
3580 | Emacs garbage collector has been changed to use conservative stack\n\ | |
3581 | marking. Emacs has determined that the method it uses to do the\n\ | |
3582 | marking will likely work on your system, but this isn't sure.\n\ | |
3583 | \n\ | |
3584 | If you are a system-programmer, or can get the help of a local wizard\n\ | |
3585 | who is, please take a look at the function mark_stack in alloc.c, and\n\ | |
3586 | verify that the methods used are appropriate for your system.\n\ | |
3587 | \n\ | |
d191623b | 3588 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
3589 | " |
3590 | ||
3591 | #define SETJMP_WILL_NOT_WORK "\ | |
3592 | \n\ | |
3593 | Emacs garbage collector has been changed to use conservative stack\n\ | |
3594 | marking. Emacs has determined that the default method it uses to do the\n\ | |
3595 | marking will not work on your system. We will need a system-dependent\n\ | |
3596 | solution for your system.\n\ | |
3597 | \n\ | |
3598 | Please take a look at the function mark_stack in alloc.c, and\n\ | |
3599 | try to find a way to make it work on your system.\n\ | |
d191623b | 3600 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
3601 | " |
3602 | ||
3603 | ||
3604 | /* Perform a quick check if it looks like setjmp saves registers in a | |
3605 | jmp_buf. Print a message to stderr saying so. When this test | |
3606 | succeeds, this is _not_ a proof that setjmp is sufficient for | |
3607 | conservative stack marking. Only the sources or a disassembly | |
3608 | can prove that. */ | |
3609 | ||
3610 | static void | |
3611 | test_setjmp () | |
3612 | { | |
3613 | char buf[10]; | |
3614 | register int x; | |
3615 | jmp_buf jbuf; | |
3616 | int result = 0; | |
3617 | ||
3618 | /* Arrange for X to be put in a register. */ | |
3619 | sprintf (buf, "1"); | |
3620 | x = strlen (buf); | |
3621 | x = 2 * x - 1; | |
3622 | ||
3623 | setjmp (jbuf); | |
3624 | if (longjmps_done == 1) | |
34400008 | 3625 | { |
182ff242 | 3626 | /* Came here after the longjmp at the end of the function. |
34400008 | 3627 | |
182ff242 GM |
3628 | If x == 1, the longjmp has restored the register to its |
3629 | value before the setjmp, and we can hope that setjmp | |
3630 | saves all such registers in the jmp_buf, although that | |
3631 | isn't sure. | |
34400008 | 3632 | |
182ff242 GM |
3633 | For other values of X, either something really strange is |
3634 | taking place, or the setjmp just didn't save the register. */ | |
3635 | ||
3636 | if (x == 1) | |
3637 | fprintf (stderr, SETJMP_WILL_LIKELY_WORK); | |
3638 | else | |
3639 | { | |
3640 | fprintf (stderr, SETJMP_WILL_NOT_WORK); | |
3641 | exit (1); | |
34400008 GM |
3642 | } |
3643 | } | |
182ff242 GM |
3644 | |
3645 | ++longjmps_done; | |
3646 | x = 2; | |
3647 | if (longjmps_done == 1) | |
3648 | longjmp (jbuf, 1); | |
34400008 GM |
3649 | } |
3650 | ||
182ff242 GM |
3651 | #endif /* not GC_SAVE_REGISTERS_ON_STACK && not GC_SETJMP_WORKS */ |
3652 | ||
34400008 GM |
3653 | |
3654 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
3655 | ||
3656 | /* Abort if anything GCPRO'd doesn't survive the GC. */ | |
3657 | ||
3658 | static void | |
3659 | check_gcpros () | |
3660 | { | |
3661 | struct gcpro *p; | |
3662 | int i; | |
3663 | ||
3664 | for (p = gcprolist; p; p = p->next) | |
3665 | for (i = 0; i < p->nvars; ++i) | |
3666 | if (!survives_gc_p (p->var[i])) | |
3667 | abort (); | |
3668 | } | |
3669 | ||
3670 | #elif GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
3671 | ||
3672 | static void | |
3673 | dump_zombies () | |
3674 | { | |
3675 | int i; | |
3676 | ||
3677 | fprintf (stderr, "\nZombies kept alive = %d:\n", nzombies); | |
3678 | for (i = 0; i < min (MAX_ZOMBIES, nzombies); ++i) | |
3679 | { | |
3680 | fprintf (stderr, " %d = ", i); | |
3681 | debug_print (zombies[i]); | |
3682 | } | |
3683 | } | |
3684 | ||
3685 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
3686 | ||
3687 | ||
182ff242 GM |
3688 | /* Mark live Lisp objects on the C stack. |
3689 | ||
3690 | There are several system-dependent problems to consider when | |
3691 | porting this to new architectures: | |
3692 | ||
3693 | Processor Registers | |
3694 | ||
3695 | We have to mark Lisp objects in CPU registers that can hold local | |
3696 | variables or are used to pass parameters. | |
3697 | ||
3698 | If GC_SAVE_REGISTERS_ON_STACK is defined, it should expand to | |
3699 | something that either saves relevant registers on the stack, or | |
3700 | calls mark_maybe_object passing it each register's contents. | |
3701 | ||
3702 | If GC_SAVE_REGISTERS_ON_STACK is not defined, the current | |
3703 | implementation assumes that calling setjmp saves registers we need | |
3704 | to see in a jmp_buf which itself lies on the stack. This doesn't | |
3705 | have to be true! It must be verified for each system, possibly | |
3706 | by taking a look at the source code of setjmp. | |
3707 | ||
3708 | Stack Layout | |
3709 | ||
3710 | Architectures differ in the way their processor stack is organized. | |
3711 | For example, the stack might look like this | |
3712 | ||
3713 | +----------------+ | |
3714 | | Lisp_Object | size = 4 | |
3715 | +----------------+ | |
3716 | | something else | size = 2 | |
3717 | +----------------+ | |
3718 | | Lisp_Object | size = 4 | |
3719 | +----------------+ | |
3720 | | ... | | |
3721 | ||
3722 | In such a case, not every Lisp_Object will be aligned equally. To | |
3723 | find all Lisp_Object on the stack it won't be sufficient to walk | |
3724 | the stack in steps of 4 bytes. Instead, two passes will be | |
3725 | necessary, one starting at the start of the stack, and a second | |
3726 | pass starting at the start of the stack + 2. Likewise, if the | |
3727 | minimal alignment of Lisp_Objects on the stack is 1, four passes | |
3728 | would be necessary, each one starting with one byte more offset | |
3729 | from the stack start. | |
3730 | ||
3731 | The current code assumes by default that Lisp_Objects are aligned | |
3732 | equally on the stack. */ | |
34400008 GM |
3733 | |
3734 | static void | |
3735 | mark_stack () | |
3736 | { | |
630909a5 | 3737 | int i; |
34400008 | 3738 | jmp_buf j; |
6bbd7a29 | 3739 | volatile int stack_grows_down_p = (char *) &j > (char *) stack_base; |
34400008 GM |
3740 | void *end; |
3741 | ||
3742 | /* This trick flushes the register windows so that all the state of | |
3743 | the process is contained in the stack. */ | |
3744 | #ifdef sparc | |
3745 | asm ("ta 3"); | |
3746 | #endif | |
3747 | ||
3748 | /* Save registers that we need to see on the stack. We need to see | |
3749 | registers used to hold register variables and registers used to | |
3750 | pass parameters. */ | |
3751 | #ifdef GC_SAVE_REGISTERS_ON_STACK | |
3752 | GC_SAVE_REGISTERS_ON_STACK (end); | |
182ff242 GM |
3753 | #else /* not GC_SAVE_REGISTERS_ON_STACK */ |
3754 | ||
3755 | #ifndef GC_SETJMP_WORKS /* If it hasn't been checked yet that | |
3756 | setjmp will definitely work, test it | |
3757 | and print a message with the result | |
3758 | of the test. */ | |
3759 | if (!setjmp_tested_p) | |
3760 | { | |
3761 | setjmp_tested_p = 1; | |
3762 | test_setjmp (); | |
3763 | } | |
3764 | #endif /* GC_SETJMP_WORKS */ | |
3765 | ||
34400008 GM |
3766 | setjmp (j); |
3767 | end = stack_grows_down_p ? (char *) &j + sizeof j : (char *) &j; | |
182ff242 | 3768 | #endif /* not GC_SAVE_REGISTERS_ON_STACK */ |
34400008 GM |
3769 | |
3770 | /* This assumes that the stack is a contiguous region in memory. If | |
182ff242 GM |
3771 | that's not the case, something has to be done here to iterate |
3772 | over the stack segments. */ | |
630909a5 AS |
3773 | #ifndef GC_LISP_OBJECT_ALIGNMENT |
3774 | #define GC_LISP_OBJECT_ALIGNMENT sizeof (Lisp_Object) | |
182ff242 | 3775 | #endif |
24452cd5 | 3776 | for (i = 0; i < sizeof (Lisp_Object); i += GC_LISP_OBJECT_ALIGNMENT) |
630909a5 | 3777 | mark_memory ((char *) stack_base + i, end); |
34400008 GM |
3778 | |
3779 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
3780 | check_gcpros (); | |
3781 | #endif | |
3782 | } | |
3783 | ||
3784 | ||
3785 | #endif /* GC_MARK_STACK != 0 */ | |
3786 | ||
3787 | ||
3788 | \f | |
2e471eb5 GM |
3789 | /*********************************************************************** |
3790 | Pure Storage Management | |
3791 | ***********************************************************************/ | |
3792 | ||
1f0b3fd2 GM |
3793 | /* Allocate room for SIZE bytes from pure Lisp storage and return a |
3794 | pointer to it. TYPE is the Lisp type for which the memory is | |
3795 | allocated. TYPE < 0 means it's not used for a Lisp object. | |
3796 | ||
3797 | If store_pure_type_info is set and TYPE is >= 0, the type of | |
3798 | the allocated object is recorded in pure_types. */ | |
3799 | ||
3800 | static POINTER_TYPE * | |
3801 | pure_alloc (size, type) | |
3802 | size_t size; | |
3803 | int type; | |
3804 | { | |
3805 | size_t nbytes; | |
3806 | POINTER_TYPE *result; | |
9e713715 | 3807 | char *beg = purebeg; |
1f0b3fd2 GM |
3808 | |
3809 | /* Give Lisp_Floats an extra alignment. */ | |
3810 | if (type == Lisp_Float) | |
3811 | { | |
3812 | size_t alignment; | |
3813 | #if defined __GNUC__ && __GNUC__ >= 2 | |
3814 | alignment = __alignof (struct Lisp_Float); | |
3815 | #else | |
3816 | alignment = sizeof (struct Lisp_Float); | |
3817 | #endif | |
3818 | pure_bytes_used = ALIGN (pure_bytes_used, alignment); | |
3819 | } | |
3820 | ||
3821 | nbytes = ALIGN (size, sizeof (EMACS_INT)); | |
9e713715 GM |
3822 | |
3823 | if (pure_bytes_used + nbytes > pure_size) | |
3824 | { | |
8322ce04 RS |
3825 | /* Don't allocate a large amount here, |
3826 | because it might get mmap'd and then its address | |
3827 | might not be usable. */ | |
3828 | beg = purebeg = (char *) xmalloc (10000); | |
3829 | pure_size = 10000; | |
9e713715 GM |
3830 | pure_bytes_used_before_overflow += pure_bytes_used; |
3831 | pure_bytes_used = 0; | |
3832 | } | |
1f0b3fd2 GM |
3833 | |
3834 | result = (POINTER_TYPE *) (beg + pure_bytes_used); | |
3835 | pure_bytes_used += nbytes; | |
3836 | return result; | |
3837 | } | |
3838 | ||
3839 | ||
852f8cdc | 3840 | /* Print a warning if PURESIZE is too small. */ |
9e713715 GM |
3841 | |
3842 | void | |
3843 | check_pure_size () | |
3844 | { | |
3845 | if (pure_bytes_used_before_overflow) | |
a4d35afd SM |
3846 | message ("Pure Lisp storage overflow (approx. %d bytes needed)", |
3847 | (int) (pure_bytes_used + pure_bytes_used_before_overflow)); | |
9e713715 GM |
3848 | } |
3849 | ||
3850 | ||
2e471eb5 GM |
3851 | /* Return a string allocated in pure space. DATA is a buffer holding |
3852 | NCHARS characters, and NBYTES bytes of string data. MULTIBYTE | |
3853 | non-zero means make the result string multibyte. | |
1a4f1e2c | 3854 | |
2e471eb5 GM |
3855 | Must get an error if pure storage is full, since if it cannot hold |
3856 | a large string it may be able to hold conses that point to that | |
3857 | string; then the string is not protected from gc. */ | |
7146af97 JB |
3858 | |
3859 | Lisp_Object | |
2e471eb5 | 3860 | make_pure_string (data, nchars, nbytes, multibyte) |
7146af97 | 3861 | char *data; |
2e471eb5 | 3862 | int nchars, nbytes; |
c0696668 | 3863 | int multibyte; |
7146af97 | 3864 | { |
2e471eb5 GM |
3865 | Lisp_Object string; |
3866 | struct Lisp_String *s; | |
c0696668 | 3867 | |
1f0b3fd2 GM |
3868 | s = (struct Lisp_String *) pure_alloc (sizeof *s, Lisp_String); |
3869 | s->data = (unsigned char *) pure_alloc (nbytes + 1, -1); | |
2e471eb5 GM |
3870 | s->size = nchars; |
3871 | s->size_byte = multibyte ? nbytes : -1; | |
3872 | bcopy (data, s->data, nbytes); | |
3873 | s->data[nbytes] = '\0'; | |
3874 | s->intervals = NULL_INTERVAL; | |
2e471eb5 GM |
3875 | XSETSTRING (string, s); |
3876 | return string; | |
7146af97 JB |
3877 | } |
3878 | ||
2e471eb5 | 3879 | |
34400008 GM |
3880 | /* Return a cons allocated from pure space. Give it pure copies |
3881 | of CAR as car and CDR as cdr. */ | |
3882 | ||
7146af97 JB |
3883 | Lisp_Object |
3884 | pure_cons (car, cdr) | |
3885 | Lisp_Object car, cdr; | |
3886 | { | |
3887 | register Lisp_Object new; | |
1f0b3fd2 | 3888 | struct Lisp_Cons *p; |
7146af97 | 3889 | |
1f0b3fd2 GM |
3890 | p = (struct Lisp_Cons *) pure_alloc (sizeof *p, Lisp_Cons); |
3891 | XSETCONS (new, p); | |
f3fbd155 KR |
3892 | XSETCAR (new, Fpurecopy (car)); |
3893 | XSETCDR (new, Fpurecopy (cdr)); | |
7146af97 JB |
3894 | return new; |
3895 | } | |
3896 | ||
7146af97 | 3897 | |
34400008 GM |
3898 | /* Value is a float object with value NUM allocated from pure space. */ |
3899 | ||
7146af97 JB |
3900 | Lisp_Object |
3901 | make_pure_float (num) | |
3902 | double num; | |
3903 | { | |
3904 | register Lisp_Object new; | |
1f0b3fd2 | 3905 | struct Lisp_Float *p; |
7146af97 | 3906 | |
1f0b3fd2 GM |
3907 | p = (struct Lisp_Float *) pure_alloc (sizeof *p, Lisp_Float); |
3908 | XSETFLOAT (new, p); | |
70949dac | 3909 | XFLOAT_DATA (new) = num; |
7146af97 JB |
3910 | return new; |
3911 | } | |
3912 | ||
34400008 GM |
3913 | |
3914 | /* Return a vector with room for LEN Lisp_Objects allocated from | |
3915 | pure space. */ | |
3916 | ||
7146af97 JB |
3917 | Lisp_Object |
3918 | make_pure_vector (len) | |
42607681 | 3919 | EMACS_INT len; |
7146af97 | 3920 | { |
1f0b3fd2 GM |
3921 | Lisp_Object new; |
3922 | struct Lisp_Vector *p; | |
3923 | size_t size = sizeof *p + (len - 1) * sizeof (Lisp_Object); | |
7146af97 | 3924 | |
1f0b3fd2 GM |
3925 | p = (struct Lisp_Vector *) pure_alloc (size, Lisp_Vectorlike); |
3926 | XSETVECTOR (new, p); | |
7146af97 JB |
3927 | XVECTOR (new)->size = len; |
3928 | return new; | |
3929 | } | |
3930 | ||
34400008 | 3931 | |
7146af97 | 3932 | DEFUN ("purecopy", Fpurecopy, Spurecopy, 1, 1, 0, |
7ee72033 | 3933 | doc: /* Make a copy of OBJECT in pure storage. |
228299fa | 3934 | Recursively copies contents of vectors and cons cells. |
7ee72033 MB |
3935 | Does not copy symbols. Copies strings without text properties. */) |
3936 | (obj) | |
7146af97 JB |
3937 | register Lisp_Object obj; |
3938 | { | |
265a9e55 | 3939 | if (NILP (Vpurify_flag)) |
7146af97 JB |
3940 | return obj; |
3941 | ||
1f0b3fd2 | 3942 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
3943 | return obj; |
3944 | ||
d6dd74bb | 3945 | if (CONSP (obj)) |
70949dac | 3946 | return pure_cons (XCAR (obj), XCDR (obj)); |
d6dd74bb | 3947 | else if (FLOATP (obj)) |
70949dac | 3948 | return make_pure_float (XFLOAT_DATA (obj)); |
d6dd74bb | 3949 | else if (STRINGP (obj)) |
3f25e183 | 3950 | return make_pure_string (XSTRING (obj)->data, XSTRING (obj)->size, |
c0696668 RS |
3951 | STRING_BYTES (XSTRING (obj)), |
3952 | STRING_MULTIBYTE (obj)); | |
d6dd74bb KH |
3953 | else if (COMPILEDP (obj) || VECTORP (obj)) |
3954 | { | |
3955 | register struct Lisp_Vector *vec; | |
3956 | register int i, size; | |
3957 | ||
3958 | size = XVECTOR (obj)->size; | |
7d535c68 KH |
3959 | if (size & PSEUDOVECTOR_FLAG) |
3960 | size &= PSEUDOVECTOR_SIZE_MASK; | |
01a4d290 | 3961 | vec = XVECTOR (make_pure_vector ((EMACS_INT) size)); |
d6dd74bb KH |
3962 | for (i = 0; i < size; i++) |
3963 | vec->contents[i] = Fpurecopy (XVECTOR (obj)->contents[i]); | |
3964 | if (COMPILEDP (obj)) | |
3965 | XSETCOMPILED (obj, vec); | |
3966 | else | |
3967 | XSETVECTOR (obj, vec); | |
7146af97 JB |
3968 | return obj; |
3969 | } | |
d6dd74bb KH |
3970 | else if (MARKERP (obj)) |
3971 | error ("Attempt to copy a marker to pure storage"); | |
6bbd7a29 GM |
3972 | |
3973 | return obj; | |
7146af97 | 3974 | } |
2e471eb5 | 3975 | |
34400008 | 3976 | |
7146af97 | 3977 | \f |
34400008 GM |
3978 | /*********************************************************************** |
3979 | Protection from GC | |
3980 | ***********************************************************************/ | |
3981 | ||
2e471eb5 GM |
3982 | /* Put an entry in staticvec, pointing at the variable with address |
3983 | VARADDRESS. */ | |
7146af97 JB |
3984 | |
3985 | void | |
3986 | staticpro (varaddress) | |
3987 | Lisp_Object *varaddress; | |
3988 | { | |
3989 | staticvec[staticidx++] = varaddress; | |
3990 | if (staticidx >= NSTATICS) | |
3991 | abort (); | |
3992 | } | |
3993 | ||
3994 | struct catchtag | |
2e471eb5 | 3995 | { |
7146af97 JB |
3996 | Lisp_Object tag; |
3997 | Lisp_Object val; | |
3998 | struct catchtag *next; | |
2e471eb5 | 3999 | }; |
7146af97 JB |
4000 | |
4001 | struct backtrace | |
2e471eb5 GM |
4002 | { |
4003 | struct backtrace *next; | |
4004 | Lisp_Object *function; | |
4005 | Lisp_Object *args; /* Points to vector of args. */ | |
4006 | int nargs; /* Length of vector. */ | |
4007 | /* If nargs is UNEVALLED, args points to slot holding list of | |
4008 | unevalled args. */ | |
4009 | char evalargs; | |
4010 | }; | |
4011 | ||
34400008 | 4012 | |
7146af97 | 4013 | \f |
34400008 GM |
4014 | /*********************************************************************** |
4015 | Protection from GC | |
4016 | ***********************************************************************/ | |
1a4f1e2c | 4017 | |
e8197642 RS |
4018 | /* Temporarily prevent garbage collection. */ |
4019 | ||
4020 | int | |
4021 | inhibit_garbage_collection () | |
4022 | { | |
4023 | int count = specpdl_ptr - specpdl; | |
54defd0d AS |
4024 | int nbits = min (VALBITS, BITS_PER_INT); |
4025 | ||
4026 | specbind (Qgc_cons_threshold, make_number (((EMACS_INT) 1 << (nbits - 1)) - 1)); | |
e8197642 RS |
4027 | return count; |
4028 | } | |
4029 | ||
34400008 | 4030 | |
7146af97 | 4031 | DEFUN ("garbage-collect", Fgarbage_collect, Sgarbage_collect, 0, 0, "", |
7ee72033 | 4032 | doc: /* Reclaim storage for Lisp objects no longer needed. |
228299fa GM |
4033 | Returns info on amount of space in use: |
4034 | ((USED-CONSES . FREE-CONSES) (USED-SYMS . FREE-SYMS) | |
4035 | (USED-MARKERS . FREE-MARKERS) USED-STRING-CHARS USED-VECTOR-SLOTS | |
4036 | (USED-FLOATS . FREE-FLOATS) (USED-INTERVALS . FREE-INTERVALS) | |
4037 | (USED-STRINGS . FREE-STRINGS)) | |
4038 | Garbage collection happens automatically if you cons more than | |
7ee72033 MB |
4039 | `gc-cons-threshold' bytes of Lisp data since previous garbage collection. */) |
4040 | () | |
7146af97 JB |
4041 | { |
4042 | register struct gcpro *tail; | |
4043 | register struct specbinding *bind; | |
4044 | struct catchtag *catch; | |
4045 | struct handler *handler; | |
4046 | register struct backtrace *backlist; | |
7146af97 JB |
4047 | char stack_top_variable; |
4048 | register int i; | |
6efc7df7 | 4049 | int message_p; |
96117bc7 | 4050 | Lisp_Object total[8]; |
98edb5ff | 4051 | int count = BINDING_STACK_SIZE (); |
7146af97 | 4052 | |
9e713715 GM |
4053 | /* Can't GC if pure storage overflowed because we can't determine |
4054 | if something is a pure object or not. */ | |
4055 | if (pure_bytes_used_before_overflow) | |
4056 | return Qnil; | |
4057 | ||
58595309 KH |
4058 | /* In case user calls debug_print during GC, |
4059 | don't let that cause a recursive GC. */ | |
4060 | consing_since_gc = 0; | |
4061 | ||
6efc7df7 GM |
4062 | /* Save what's currently displayed in the echo area. */ |
4063 | message_p = push_message (); | |
98edb5ff | 4064 | record_unwind_protect (push_message_unwind, Qnil); |
41c28a37 | 4065 | |
7146af97 JB |
4066 | /* Save a copy of the contents of the stack, for debugging. */ |
4067 | #if MAX_SAVE_STACK > 0 | |
265a9e55 | 4068 | if (NILP (Vpurify_flag)) |
7146af97 JB |
4069 | { |
4070 | i = &stack_top_variable - stack_bottom; | |
4071 | if (i < 0) i = -i; | |
4072 | if (i < MAX_SAVE_STACK) | |
4073 | { | |
4074 | if (stack_copy == 0) | |
9ac0d9e0 | 4075 | stack_copy = (char *) xmalloc (stack_copy_size = i); |
7146af97 | 4076 | else if (stack_copy_size < i) |
9ac0d9e0 | 4077 | stack_copy = (char *) xrealloc (stack_copy, (stack_copy_size = i)); |
7146af97 JB |
4078 | if (stack_copy) |
4079 | { | |
42607681 | 4080 | if ((EMACS_INT) (&stack_top_variable - stack_bottom) > 0) |
7146af97 JB |
4081 | bcopy (stack_bottom, stack_copy, i); |
4082 | else | |
4083 | bcopy (&stack_top_variable, stack_copy, i); | |
4084 | } | |
4085 | } | |
4086 | } | |
4087 | #endif /* MAX_SAVE_STACK > 0 */ | |
4088 | ||
299585ee | 4089 | if (garbage_collection_messages) |
691c4285 | 4090 | message1_nolog ("Garbage collecting..."); |
7146af97 | 4091 | |
6e0fca1d RS |
4092 | BLOCK_INPUT; |
4093 | ||
eec7b73d RS |
4094 | shrink_regexp_cache (); |
4095 | ||
4929a878 | 4096 | /* Don't keep undo information around forever. */ |
7146af97 JB |
4097 | { |
4098 | register struct buffer *nextb = all_buffers; | |
4099 | ||
4100 | while (nextb) | |
4101 | { | |
ffd56f97 JB |
4102 | /* If a buffer's undo list is Qt, that means that undo is |
4103 | turned off in that buffer. Calling truncate_undo_list on | |
4104 | Qt tends to return NULL, which effectively turns undo back on. | |
4105 | So don't call truncate_undo_list if undo_list is Qt. */ | |
4106 | if (! EQ (nextb->undo_list, Qt)) | |
4107 | nextb->undo_list | |
502b9b64 JB |
4108 | = truncate_undo_list (nextb->undo_list, undo_limit, |
4109 | undo_strong_limit); | |
e0fead5d AI |
4110 | |
4111 | /* Shrink buffer gaps, but skip indirect and dead buffers. */ | |
4112 | if (nextb->base_buffer == 0 && !NILP (nextb->name)) | |
4113 | { | |
4114 | /* If a buffer's gap size is more than 10% of the buffer | |
4115 | size, or larger than 2000 bytes, then shrink it | |
4116 | accordingly. Keep a minimum size of 20 bytes. */ | |
4117 | int size = min (2000, max (20, (nextb->text->z_byte / 10))); | |
4118 | ||
4119 | if (nextb->text->gap_size > size) | |
4120 | { | |
4121 | struct buffer *save_current = current_buffer; | |
4122 | current_buffer = nextb; | |
4123 | make_gap (-(nextb->text->gap_size - size)); | |
4124 | current_buffer = save_current; | |
4125 | } | |
4126 | } | |
4127 | ||
7146af97 JB |
4128 | nextb = nextb->next; |
4129 | } | |
4130 | } | |
4131 | ||
4132 | gc_in_progress = 1; | |
4133 | ||
c23baf9f | 4134 | /* clear_marks (); */ |
7146af97 | 4135 | |
7146af97 JB |
4136 | /* Mark all the special slots that serve as the roots of accessibility. |
4137 | ||
4138 | Usually the special slots to mark are contained in particular structures. | |
4139 | Then we know no slot is marked twice because the structures don't overlap. | |
4140 | In some cases, the structures point to the slots to be marked. | |
4141 | For these, we use MARKBIT to avoid double marking of the slot. */ | |
4142 | ||
4143 | for (i = 0; i < staticidx; i++) | |
4144 | mark_object (staticvec[i]); | |
34400008 GM |
4145 | |
4146 | #if (GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS \ | |
4147 | || GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS) | |
4148 | mark_stack (); | |
4149 | #else | |
7146af97 JB |
4150 | for (tail = gcprolist; tail; tail = tail->next) |
4151 | for (i = 0; i < tail->nvars; i++) | |
4152 | if (!XMARKBIT (tail->var[i])) | |
4153 | { | |
1efc2bb9 EZ |
4154 | /* Explicit casting prevents compiler warning about |
4155 | discarding the `volatile' qualifier. */ | |
4156 | mark_object ((Lisp_Object *)&tail->var[i]); | |
7146af97 JB |
4157 | XMARK (tail->var[i]); |
4158 | } | |
34400008 GM |
4159 | #endif |
4160 | ||
630686c8 | 4161 | mark_byte_stack (); |
7146af97 JB |
4162 | for (bind = specpdl; bind != specpdl_ptr; bind++) |
4163 | { | |
4164 | mark_object (&bind->symbol); | |
4165 | mark_object (&bind->old_value); | |
4166 | } | |
4167 | for (catch = catchlist; catch; catch = catch->next) | |
4168 | { | |
4169 | mark_object (&catch->tag); | |
4170 | mark_object (&catch->val); | |
4171 | } | |
4172 | for (handler = handlerlist; handler; handler = handler->next) | |
4173 | { | |
4174 | mark_object (&handler->handler); | |
4175 | mark_object (&handler->var); | |
4176 | } | |
4177 | for (backlist = backtrace_list; backlist; backlist = backlist->next) | |
4178 | { | |
4179 | if (!XMARKBIT (*backlist->function)) | |
4180 | { | |
4181 | mark_object (backlist->function); | |
4182 | XMARK (*backlist->function); | |
4183 | } | |
4184 | if (backlist->nargs == UNEVALLED || backlist->nargs == MANY) | |
4185 | i = 0; | |
4186 | else | |
4187 | i = backlist->nargs - 1; | |
4188 | for (; i >= 0; i--) | |
4189 | if (!XMARKBIT (backlist->args[i])) | |
4190 | { | |
4191 | mark_object (&backlist->args[i]); | |
4192 | XMARK (backlist->args[i]); | |
4193 | } | |
4194 | } | |
b875d3f7 | 4195 | mark_kboards (); |
7146af97 | 4196 | |
4c315bda RS |
4197 | /* Look thru every buffer's undo list |
4198 | for elements that update markers that were not marked, | |
4199 | and delete them. */ | |
4200 | { | |
4201 | register struct buffer *nextb = all_buffers; | |
4202 | ||
4203 | while (nextb) | |
4204 | { | |
4205 | /* If a buffer's undo list is Qt, that means that undo is | |
4206 | turned off in that buffer. Calling truncate_undo_list on | |
4207 | Qt tends to return NULL, which effectively turns undo back on. | |
4208 | So don't call truncate_undo_list if undo_list is Qt. */ | |
4209 | if (! EQ (nextb->undo_list, Qt)) | |
4210 | { | |
4211 | Lisp_Object tail, prev; | |
4212 | tail = nextb->undo_list; | |
4213 | prev = Qnil; | |
4214 | while (CONSP (tail)) | |
4215 | { | |
70949dac KR |
4216 | if (GC_CONSP (XCAR (tail)) |
4217 | && GC_MARKERP (XCAR (XCAR (tail))) | |
4218 | && ! XMARKBIT (XMARKER (XCAR (XCAR (tail)))->chain)) | |
4c315bda RS |
4219 | { |
4220 | if (NILP (prev)) | |
70949dac | 4221 | nextb->undo_list = tail = XCDR (tail); |
4c315bda | 4222 | else |
f3fbd155 KR |
4223 | { |
4224 | tail = XCDR (tail); | |
4225 | XSETCDR (prev, tail); | |
4226 | } | |
4c315bda RS |
4227 | } |
4228 | else | |
4229 | { | |
4230 | prev = tail; | |
70949dac | 4231 | tail = XCDR (tail); |
4c315bda RS |
4232 | } |
4233 | } | |
4234 | } | |
4235 | ||
4236 | nextb = nextb->next; | |
4237 | } | |
4238 | } | |
4239 | ||
34400008 GM |
4240 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
4241 | mark_stack (); | |
4242 | #endif | |
4243 | ||
7146af97 JB |
4244 | gc_sweep (); |
4245 | ||
4246 | /* Clear the mark bits that we set in certain root slots. */ | |
4247 | ||
34400008 GM |
4248 | #if (GC_MARK_STACK == GC_USE_GCPROS_AS_BEFORE \ |
4249 | || GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES) | |
7146af97 JB |
4250 | for (tail = gcprolist; tail; tail = tail->next) |
4251 | for (i = 0; i < tail->nvars; i++) | |
4252 | XUNMARK (tail->var[i]); | |
34400008 GM |
4253 | #endif |
4254 | ||
033a5fa3 | 4255 | unmark_byte_stack (); |
7146af97 JB |
4256 | for (backlist = backtrace_list; backlist; backlist = backlist->next) |
4257 | { | |
4258 | XUNMARK (*backlist->function); | |
4259 | if (backlist->nargs == UNEVALLED || backlist->nargs == MANY) | |
4260 | i = 0; | |
4261 | else | |
4262 | i = backlist->nargs - 1; | |
4263 | for (; i >= 0; i--) | |
4264 | XUNMARK (backlist->args[i]); | |
4265 | } | |
4266 | XUNMARK (buffer_defaults.name); | |
4267 | XUNMARK (buffer_local_symbols.name); | |
4268 | ||
34400008 GM |
4269 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES && 0 |
4270 | dump_zombies (); | |
4271 | #endif | |
4272 | ||
6e0fca1d RS |
4273 | UNBLOCK_INPUT; |
4274 | ||
c23baf9f | 4275 | /* clear_marks (); */ |
7146af97 JB |
4276 | gc_in_progress = 0; |
4277 | ||
4278 | consing_since_gc = 0; | |
4279 | if (gc_cons_threshold < 10000) | |
4280 | gc_cons_threshold = 10000; | |
4281 | ||
299585ee RS |
4282 | if (garbage_collection_messages) |
4283 | { | |
6efc7df7 GM |
4284 | if (message_p || minibuf_level > 0) |
4285 | restore_message (); | |
299585ee RS |
4286 | else |
4287 | message1_nolog ("Garbage collecting...done"); | |
4288 | } | |
7146af97 | 4289 | |
98edb5ff | 4290 | unbind_to (count, Qnil); |
2e471eb5 GM |
4291 | |
4292 | total[0] = Fcons (make_number (total_conses), | |
4293 | make_number (total_free_conses)); | |
4294 | total[1] = Fcons (make_number (total_symbols), | |
4295 | make_number (total_free_symbols)); | |
4296 | total[2] = Fcons (make_number (total_markers), | |
4297 | make_number (total_free_markers)); | |
96117bc7 GM |
4298 | total[3] = make_number (total_string_size); |
4299 | total[4] = make_number (total_vector_size); | |
4300 | total[5] = Fcons (make_number (total_floats), | |
2e471eb5 | 4301 | make_number (total_free_floats)); |
96117bc7 | 4302 | total[6] = Fcons (make_number (total_intervals), |
2e471eb5 | 4303 | make_number (total_free_intervals)); |
96117bc7 | 4304 | total[7] = Fcons (make_number (total_strings), |
2e471eb5 GM |
4305 | make_number (total_free_strings)); |
4306 | ||
34400008 | 4307 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
7146af97 | 4308 | { |
34400008 GM |
4309 | /* Compute average percentage of zombies. */ |
4310 | double nlive = 0; | |
4311 | ||
4312 | for (i = 0; i < 7; ++i) | |
4313 | nlive += XFASTINT (XCAR (total[i])); | |
4314 | ||
4315 | avg_live = (avg_live * ngcs + nlive) / (ngcs + 1); | |
4316 | max_live = max (nlive, max_live); | |
4317 | avg_zombies = (avg_zombies * ngcs + nzombies) / (ngcs + 1); | |
4318 | max_zombies = max (nzombies, max_zombies); | |
4319 | ++ngcs; | |
4320 | } | |
4321 | #endif | |
7146af97 | 4322 | |
9e713715 GM |
4323 | if (!NILP (Vpost_gc_hook)) |
4324 | { | |
4325 | int count = inhibit_garbage_collection (); | |
4326 | safe_run_hooks (Qpost_gc_hook); | |
4327 | unbind_to (count, Qnil); | |
4328 | } | |
4329 | ||
96117bc7 | 4330 | return Flist (sizeof total / sizeof *total, total); |
7146af97 | 4331 | } |
34400008 | 4332 | |
41c28a37 | 4333 | |
3770920e GM |
4334 | /* Mark Lisp objects in glyph matrix MATRIX. Currently the |
4335 | only interesting objects referenced from glyphs are strings. */ | |
41c28a37 GM |
4336 | |
4337 | static void | |
4338 | mark_glyph_matrix (matrix) | |
4339 | struct glyph_matrix *matrix; | |
4340 | { | |
4341 | struct glyph_row *row = matrix->rows; | |
4342 | struct glyph_row *end = row + matrix->nrows; | |
4343 | ||
2e471eb5 GM |
4344 | for (; row < end; ++row) |
4345 | if (row->enabled_p) | |
4346 | { | |
4347 | int area; | |
4348 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
4349 | { | |
4350 | struct glyph *glyph = row->glyphs[area]; | |
4351 | struct glyph *end_glyph = glyph + row->used[area]; | |
4352 | ||
4353 | for (; glyph < end_glyph; ++glyph) | |
4354 | if (GC_STRINGP (glyph->object) | |
4355 | && !STRING_MARKED_P (XSTRING (glyph->object))) | |
4356 | mark_object (&glyph->object); | |
4357 | } | |
4358 | } | |
41c28a37 GM |
4359 | } |
4360 | ||
34400008 | 4361 | |
41c28a37 GM |
4362 | /* Mark Lisp faces in the face cache C. */ |
4363 | ||
4364 | static void | |
4365 | mark_face_cache (c) | |
4366 | struct face_cache *c; | |
4367 | { | |
4368 | if (c) | |
4369 | { | |
4370 | int i, j; | |
4371 | for (i = 0; i < c->used; ++i) | |
4372 | { | |
4373 | struct face *face = FACE_FROM_ID (c->f, i); | |
4374 | ||
4375 | if (face) | |
4376 | { | |
4377 | for (j = 0; j < LFACE_VECTOR_SIZE; ++j) | |
4378 | mark_object (&face->lface[j]); | |
41c28a37 GM |
4379 | } |
4380 | } | |
4381 | } | |
4382 | } | |
4383 | ||
4384 | ||
4385 | #ifdef HAVE_WINDOW_SYSTEM | |
4386 | ||
4387 | /* Mark Lisp objects in image IMG. */ | |
4388 | ||
4389 | static void | |
4390 | mark_image (img) | |
4391 | struct image *img; | |
4392 | { | |
4393 | mark_object (&img->spec); | |
4394 | ||
3e60b029 | 4395 | if (!NILP (img->data.lisp_val)) |
41c28a37 GM |
4396 | mark_object (&img->data.lisp_val); |
4397 | } | |
4398 | ||
4399 | ||
4400 | /* Mark Lisp objects in image cache of frame F. It's done this way so | |
4401 | that we don't have to include xterm.h here. */ | |
4402 | ||
4403 | static void | |
4404 | mark_image_cache (f) | |
4405 | struct frame *f; | |
4406 | { | |
4407 | forall_images_in_image_cache (f, mark_image); | |
4408 | } | |
4409 | ||
4410 | #endif /* HAVE_X_WINDOWS */ | |
4411 | ||
4412 | ||
7146af97 | 4413 | \f |
1a4f1e2c | 4414 | /* Mark reference to a Lisp_Object. |
2e471eb5 GM |
4415 | If the object referred to has not been seen yet, recursively mark |
4416 | all the references contained in it. */ | |
7146af97 | 4417 | |
785cd37f RS |
4418 | #define LAST_MARKED_SIZE 500 |
4419 | Lisp_Object *last_marked[LAST_MARKED_SIZE]; | |
4420 | int last_marked_index; | |
4421 | ||
41c28a37 | 4422 | void |
436c5811 RS |
4423 | mark_object (argptr) |
4424 | Lisp_Object *argptr; | |
7146af97 | 4425 | { |
436c5811 | 4426 | Lisp_Object *objptr = argptr; |
7146af97 | 4427 | register Lisp_Object obj; |
4f5c1376 GM |
4428 | #ifdef GC_CHECK_MARKED_OBJECTS |
4429 | void *po; | |
4430 | struct mem_node *m; | |
4431 | #endif | |
7146af97 | 4432 | |
9149e743 | 4433 | loop: |
7146af97 | 4434 | obj = *objptr; |
9149e743 | 4435 | loop2: |
7146af97 JB |
4436 | XUNMARK (obj); |
4437 | ||
1f0b3fd2 | 4438 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
4439 | return; |
4440 | ||
785cd37f RS |
4441 | last_marked[last_marked_index++] = objptr; |
4442 | if (last_marked_index == LAST_MARKED_SIZE) | |
4443 | last_marked_index = 0; | |
4444 | ||
4f5c1376 GM |
4445 | /* Perform some sanity checks on the objects marked here. Abort if |
4446 | we encounter an object we know is bogus. This increases GC time | |
4447 | by ~80%, and requires compilation with GC_MARK_STACK != 0. */ | |
4448 | #ifdef GC_CHECK_MARKED_OBJECTS | |
4449 | ||
4450 | po = (void *) XPNTR (obj); | |
4451 | ||
4452 | /* Check that the object pointed to by PO is known to be a Lisp | |
4453 | structure allocated from the heap. */ | |
4454 | #define CHECK_ALLOCATED() \ | |
4455 | do { \ | |
4456 | m = mem_find (po); \ | |
4457 | if (m == MEM_NIL) \ | |
4458 | abort (); \ | |
4459 | } while (0) | |
4460 | ||
4461 | /* Check that the object pointed to by PO is live, using predicate | |
4462 | function LIVEP. */ | |
4463 | #define CHECK_LIVE(LIVEP) \ | |
4464 | do { \ | |
4465 | if (!LIVEP (m, po)) \ | |
4466 | abort (); \ | |
4467 | } while (0) | |
4468 | ||
4469 | /* Check both of the above conditions. */ | |
4470 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) \ | |
4471 | do { \ | |
4472 | CHECK_ALLOCATED (); \ | |
4473 | CHECK_LIVE (LIVEP); \ | |
4474 | } while (0) \ | |
4475 | ||
4476 | #else /* not GC_CHECK_MARKED_OBJECTS */ | |
4477 | ||
4478 | #define CHECK_ALLOCATED() (void) 0 | |
4479 | #define CHECK_LIVE(LIVEP) (void) 0 | |
4480 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) (void) 0 | |
4481 | ||
4482 | #endif /* not GC_CHECK_MARKED_OBJECTS */ | |
4483 | ||
0220c518 | 4484 | switch (SWITCH_ENUM_CAST (XGCTYPE (obj))) |
7146af97 JB |
4485 | { |
4486 | case Lisp_String: | |
4487 | { | |
4488 | register struct Lisp_String *ptr = XSTRING (obj); | |
4f5c1376 | 4489 | CHECK_ALLOCATED_AND_LIVE (live_string_p); |
d5e35230 | 4490 | MARK_INTERVAL_TREE (ptr->intervals); |
2e471eb5 | 4491 | MARK_STRING (ptr); |
361b097f | 4492 | #ifdef GC_CHECK_STRING_BYTES |
676a7251 GM |
4493 | /* Check that the string size recorded in the string is the |
4494 | same as the one recorded in the sdata structure. */ | |
4495 | CHECK_STRING_BYTES (ptr); | |
361b097f | 4496 | #endif /* GC_CHECK_STRING_BYTES */ |
7146af97 JB |
4497 | } |
4498 | break; | |
4499 | ||
76437631 | 4500 | case Lisp_Vectorlike: |
4f5c1376 GM |
4501 | #ifdef GC_CHECK_MARKED_OBJECTS |
4502 | m = mem_find (po); | |
4503 | if (m == MEM_NIL && !GC_SUBRP (obj) | |
4504 | && po != &buffer_defaults | |
4505 | && po != &buffer_local_symbols) | |
4506 | abort (); | |
4507 | #endif /* GC_CHECK_MARKED_OBJECTS */ | |
4508 | ||
30e3190a | 4509 | if (GC_BUFFERP (obj)) |
6b552283 KH |
4510 | { |
4511 | if (!XMARKBIT (XBUFFER (obj)->name)) | |
4f5c1376 GM |
4512 | { |
4513 | #ifdef GC_CHECK_MARKED_OBJECTS | |
4514 | if (po != &buffer_defaults && po != &buffer_local_symbols) | |
4515 | { | |
4516 | struct buffer *b; | |
4517 | for (b = all_buffers; b && b != po; b = b->next) | |
4518 | ; | |
4519 | if (b == NULL) | |
4520 | abort (); | |
4521 | } | |
4522 | #endif /* GC_CHECK_MARKED_OBJECTS */ | |
4523 | mark_buffer (obj); | |
4524 | } | |
6b552283 | 4525 | } |
30e3190a | 4526 | else if (GC_SUBRP (obj)) |
169ee243 RS |
4527 | break; |
4528 | else if (GC_COMPILEDP (obj)) | |
2e471eb5 GM |
4529 | /* We could treat this just like a vector, but it is better to |
4530 | save the COMPILED_CONSTANTS element for last and avoid | |
4531 | recursion there. */ | |
169ee243 RS |
4532 | { |
4533 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4534 | register EMACS_INT size = ptr->size; | |
169ee243 RS |
4535 | register int i; |
4536 | ||
4537 | if (size & ARRAY_MARK_FLAG) | |
4538 | break; /* Already marked */ | |
4f5c1376 GM |
4539 | |
4540 | CHECK_LIVE (live_vector_p); | |
169ee243 | 4541 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ |
76437631 | 4542 | size &= PSEUDOVECTOR_SIZE_MASK; |
169ee243 RS |
4543 | for (i = 0; i < size; i++) /* and then mark its elements */ |
4544 | { | |
4545 | if (i != COMPILED_CONSTANTS) | |
c70bbf06 | 4546 | mark_object (&ptr->contents[i]); |
169ee243 RS |
4547 | } |
4548 | /* This cast should be unnecessary, but some Mips compiler complains | |
4549 | (MIPS-ABI + SysVR4, DC/OSx, etc). */ | |
c70bbf06 | 4550 | objptr = (Lisp_Object *) &ptr->contents[COMPILED_CONSTANTS]; |
169ee243 RS |
4551 | goto loop; |
4552 | } | |
169ee243 RS |
4553 | else if (GC_FRAMEP (obj)) |
4554 | { | |
c70bbf06 | 4555 | register struct frame *ptr = XFRAME (obj); |
169ee243 RS |
4556 | register EMACS_INT size = ptr->size; |
4557 | ||
4558 | if (size & ARRAY_MARK_FLAG) break; /* Already marked */ | |
4559 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ | |
4560 | ||
4f5c1376 | 4561 | CHECK_LIVE (live_vector_p); |
169ee243 | 4562 | mark_object (&ptr->name); |
894a9d16 | 4563 | mark_object (&ptr->icon_name); |
aba6deb8 | 4564 | mark_object (&ptr->title); |
169ee243 RS |
4565 | mark_object (&ptr->focus_frame); |
4566 | mark_object (&ptr->selected_window); | |
4567 | mark_object (&ptr->minibuffer_window); | |
4568 | mark_object (&ptr->param_alist); | |
4569 | mark_object (&ptr->scroll_bars); | |
4570 | mark_object (&ptr->condemned_scroll_bars); | |
4571 | mark_object (&ptr->menu_bar_items); | |
4572 | mark_object (&ptr->face_alist); | |
4573 | mark_object (&ptr->menu_bar_vector); | |
4574 | mark_object (&ptr->buffer_predicate); | |
a0e1f185 | 4575 | mark_object (&ptr->buffer_list); |
41c28a37 | 4576 | mark_object (&ptr->menu_bar_window); |
9ea173e8 | 4577 | mark_object (&ptr->tool_bar_window); |
41c28a37 GM |
4578 | mark_face_cache (ptr->face_cache); |
4579 | #ifdef HAVE_WINDOW_SYSTEM | |
4580 | mark_image_cache (ptr); | |
e2c556b4 | 4581 | mark_object (&ptr->tool_bar_items); |
9ea173e8 GM |
4582 | mark_object (&ptr->desired_tool_bar_string); |
4583 | mark_object (&ptr->current_tool_bar_string); | |
41c28a37 | 4584 | #endif /* HAVE_WINDOW_SYSTEM */ |
169ee243 | 4585 | } |
7b07587b | 4586 | else if (GC_BOOL_VECTOR_P (obj)) |
707788bd RS |
4587 | { |
4588 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4589 | ||
4590 | if (ptr->size & ARRAY_MARK_FLAG) | |
4591 | break; /* Already marked */ | |
4f5c1376 | 4592 | CHECK_LIVE (live_vector_p); |
707788bd RS |
4593 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ |
4594 | } | |
41c28a37 GM |
4595 | else if (GC_WINDOWP (obj)) |
4596 | { | |
4597 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4598 | struct window *w = XWINDOW (obj); | |
4599 | register EMACS_INT size = ptr->size; | |
41c28a37 GM |
4600 | register int i; |
4601 | ||
4602 | /* Stop if already marked. */ | |
4603 | if (size & ARRAY_MARK_FLAG) | |
4604 | break; | |
4605 | ||
4606 | /* Mark it. */ | |
4f5c1376 | 4607 | CHECK_LIVE (live_vector_p); |
41c28a37 GM |
4608 | ptr->size |= ARRAY_MARK_FLAG; |
4609 | ||
4610 | /* There is no Lisp data above The member CURRENT_MATRIX in | |
4611 | struct WINDOW. Stop marking when that slot is reached. */ | |
4612 | for (i = 0; | |
c70bbf06 | 4613 | (char *) &ptr->contents[i] < (char *) &w->current_matrix; |
41c28a37 | 4614 | i++) |
c70bbf06 | 4615 | mark_object (&ptr->contents[i]); |
41c28a37 GM |
4616 | |
4617 | /* Mark glyphs for leaf windows. Marking window matrices is | |
4618 | sufficient because frame matrices use the same glyph | |
4619 | memory. */ | |
4620 | if (NILP (w->hchild) | |
4621 | && NILP (w->vchild) | |
4622 | && w->current_matrix) | |
4623 | { | |
4624 | mark_glyph_matrix (w->current_matrix); | |
4625 | mark_glyph_matrix (w->desired_matrix); | |
4626 | } | |
4627 | } | |
4628 | else if (GC_HASH_TABLE_P (obj)) | |
4629 | { | |
4630 | struct Lisp_Hash_Table *h = XHASH_TABLE (obj); | |
4631 | EMACS_INT size = h->size; | |
4632 | ||
4633 | /* Stop if already marked. */ | |
4634 | if (size & ARRAY_MARK_FLAG) | |
4635 | break; | |
4f5c1376 | 4636 | |
41c28a37 | 4637 | /* Mark it. */ |
4f5c1376 | 4638 | CHECK_LIVE (live_vector_p); |
41c28a37 GM |
4639 | h->size |= ARRAY_MARK_FLAG; |
4640 | ||
4641 | /* Mark contents. */ | |
94a877ef RS |
4642 | /* Do not mark next_free or next_weak. |
4643 | Being in the next_weak chain | |
4644 | should not keep the hash table alive. | |
4645 | No need to mark `count' since it is an integer. */ | |
41c28a37 GM |
4646 | mark_object (&h->test); |
4647 | mark_object (&h->weak); | |
4648 | mark_object (&h->rehash_size); | |
4649 | mark_object (&h->rehash_threshold); | |
4650 | mark_object (&h->hash); | |
4651 | mark_object (&h->next); | |
4652 | mark_object (&h->index); | |
4653 | mark_object (&h->user_hash_function); | |
4654 | mark_object (&h->user_cmp_function); | |
4655 | ||
4656 | /* If hash table is not weak, mark all keys and values. | |
4657 | For weak tables, mark only the vector. */ | |
4658 | if (GC_NILP (h->weak)) | |
4659 | mark_object (&h->key_and_value); | |
4660 | else | |
4661 | XVECTOR (h->key_and_value)->size |= ARRAY_MARK_FLAG; | |
4662 | ||
4663 | } | |
04ff9756 | 4664 | else |
169ee243 RS |
4665 | { |
4666 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4667 | register EMACS_INT size = ptr->size; | |
169ee243 RS |
4668 | register int i; |
4669 | ||
4670 | if (size & ARRAY_MARK_FLAG) break; /* Already marked */ | |
4f5c1376 | 4671 | CHECK_LIVE (live_vector_p); |
169ee243 RS |
4672 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ |
4673 | if (size & PSEUDOVECTOR_FLAG) | |
4674 | size &= PSEUDOVECTOR_SIZE_MASK; | |
41c28a37 | 4675 | |
169ee243 | 4676 | for (i = 0; i < size; i++) /* and then mark its elements */ |
c70bbf06 | 4677 | mark_object (&ptr->contents[i]); |
169ee243 RS |
4678 | } |
4679 | break; | |
7146af97 | 4680 | |
7146af97 JB |
4681 | case Lisp_Symbol: |
4682 | { | |
c70bbf06 | 4683 | register struct Lisp_Symbol *ptr = XSYMBOL (obj); |
7146af97 JB |
4684 | struct Lisp_Symbol *ptrx; |
4685 | ||
4686 | if (XMARKBIT (ptr->plist)) break; | |
4f5c1376 | 4687 | CHECK_ALLOCATED_AND_LIVE (live_symbol_p); |
7146af97 | 4688 | XMARK (ptr->plist); |
7146af97 JB |
4689 | mark_object ((Lisp_Object *) &ptr->value); |
4690 | mark_object (&ptr->function); | |
4691 | mark_object (&ptr->plist); | |
34400008 GM |
4692 | |
4693 | if (!PURE_POINTER_P (ptr->name)) | |
4694 | MARK_STRING (ptr->name); | |
2e471eb5 | 4695 | MARK_INTERVAL_TREE (ptr->name->intervals); |
2e471eb5 | 4696 | |
1c6bb482 RS |
4697 | /* Note that we do not mark the obarray of the symbol. |
4698 | It is safe not to do so because nothing accesses that | |
4699 | slot except to check whether it is nil. */ | |
7146af97 JB |
4700 | ptr = ptr->next; |
4701 | if (ptr) | |
4702 | { | |
9149e743 KH |
4703 | /* For the benefit of the last_marked log. */ |
4704 | objptr = (Lisp_Object *)&XSYMBOL (obj)->next; | |
b0846f52 | 4705 | ptrx = ptr; /* Use of ptrx avoids compiler bug on Sun */ |
7146af97 | 4706 | XSETSYMBOL (obj, ptrx); |
9149e743 KH |
4707 | /* We can't goto loop here because *objptr doesn't contain an |
4708 | actual Lisp_Object with valid datatype field. */ | |
4709 | goto loop2; | |
7146af97 JB |
4710 | } |
4711 | } | |
4712 | break; | |
4713 | ||
a0a38eb7 | 4714 | case Lisp_Misc: |
4f5c1376 | 4715 | CHECK_ALLOCATED_AND_LIVE (live_misc_p); |
a5da44fe | 4716 | switch (XMISCTYPE (obj)) |
a0a38eb7 KH |
4717 | { |
4718 | case Lisp_Misc_Marker: | |
4719 | XMARK (XMARKER (obj)->chain); | |
4720 | /* DO NOT mark thru the marker's chain. | |
4721 | The buffer's markers chain does not preserve markers from gc; | |
4722 | instead, markers are removed from the chain when freed by gc. */ | |
4723 | break; | |
4724 | ||
465edf35 KH |
4725 | case Lisp_Misc_Buffer_Local_Value: |
4726 | case Lisp_Misc_Some_Buffer_Local_Value: | |
4727 | { | |
4728 | register struct Lisp_Buffer_Local_Value *ptr | |
4729 | = XBUFFER_LOCAL_VALUE (obj); | |
a9faeabe RS |
4730 | if (XMARKBIT (ptr->realvalue)) break; |
4731 | XMARK (ptr->realvalue); | |
465edf35 KH |
4732 | /* If the cdr is nil, avoid recursion for the car. */ |
4733 | if (EQ (ptr->cdr, Qnil)) | |
4734 | { | |
a9faeabe | 4735 | objptr = &ptr->realvalue; |
465edf35 KH |
4736 | goto loop; |
4737 | } | |
a9faeabe RS |
4738 | mark_object (&ptr->realvalue); |
4739 | mark_object (&ptr->buffer); | |
4740 | mark_object (&ptr->frame); | |
c70bbf06 | 4741 | objptr = &ptr->cdr; |
465edf35 KH |
4742 | goto loop; |
4743 | } | |
4744 | ||
c8616056 KH |
4745 | case Lisp_Misc_Intfwd: |
4746 | case Lisp_Misc_Boolfwd: | |
4747 | case Lisp_Misc_Objfwd: | |
4748 | case Lisp_Misc_Buffer_Objfwd: | |
b875d3f7 | 4749 | case Lisp_Misc_Kboard_Objfwd: |
c8616056 KH |
4750 | /* Don't bother with Lisp_Buffer_Objfwd, |
4751 | since all markable slots in current buffer marked anyway. */ | |
4752 | /* Don't need to do Lisp_Objfwd, since the places they point | |
4753 | are protected with staticpro. */ | |
4754 | break; | |
4755 | ||
e202fa34 KH |
4756 | case Lisp_Misc_Overlay: |
4757 | { | |
4758 | struct Lisp_Overlay *ptr = XOVERLAY (obj); | |
4759 | if (!XMARKBIT (ptr->plist)) | |
4760 | { | |
4761 | XMARK (ptr->plist); | |
4762 | mark_object (&ptr->start); | |
4763 | mark_object (&ptr->end); | |
4764 | objptr = &ptr->plist; | |
4765 | goto loop; | |
4766 | } | |
4767 | } | |
4768 | break; | |
4769 | ||
a0a38eb7 KH |
4770 | default: |
4771 | abort (); | |
4772 | } | |
7146af97 JB |
4773 | break; |
4774 | ||
4775 | case Lisp_Cons: | |
7146af97 JB |
4776 | { |
4777 | register struct Lisp_Cons *ptr = XCONS (obj); | |
4778 | if (XMARKBIT (ptr->car)) break; | |
4f5c1376 | 4779 | CHECK_ALLOCATED_AND_LIVE (live_cons_p); |
7146af97 | 4780 | XMARK (ptr->car); |
c54ca951 RS |
4781 | /* If the cdr is nil, avoid recursion for the car. */ |
4782 | if (EQ (ptr->cdr, Qnil)) | |
4783 | { | |
4784 | objptr = &ptr->car; | |
c54ca951 RS |
4785 | goto loop; |
4786 | } | |
7146af97 | 4787 | mark_object (&ptr->car); |
c70bbf06 | 4788 | objptr = &ptr->cdr; |
7146af97 JB |
4789 | goto loop; |
4790 | } | |
4791 | ||
7146af97 | 4792 | case Lisp_Float: |
4f5c1376 | 4793 | CHECK_ALLOCATED_AND_LIVE (live_float_p); |
7146af97 JB |
4794 | XMARK (XFLOAT (obj)->type); |
4795 | break; | |
7146af97 | 4796 | |
7146af97 | 4797 | case Lisp_Int: |
7146af97 JB |
4798 | break; |
4799 | ||
4800 | default: | |
4801 | abort (); | |
4802 | } | |
4f5c1376 GM |
4803 | |
4804 | #undef CHECK_LIVE | |
4805 | #undef CHECK_ALLOCATED | |
4806 | #undef CHECK_ALLOCATED_AND_LIVE | |
7146af97 JB |
4807 | } |
4808 | ||
4809 | /* Mark the pointers in a buffer structure. */ | |
4810 | ||
4811 | static void | |
4812 | mark_buffer (buf) | |
4813 | Lisp_Object buf; | |
4814 | { | |
7146af97 JB |
4815 | register struct buffer *buffer = XBUFFER (buf); |
4816 | register Lisp_Object *ptr; | |
30e3190a | 4817 | Lisp_Object base_buffer; |
7146af97 JB |
4818 | |
4819 | /* This is the buffer's markbit */ | |
4820 | mark_object (&buffer->name); | |
4821 | XMARK (buffer->name); | |
4822 | ||
30e3190a | 4823 | MARK_INTERVAL_TREE (BUF_INTERVALS (buffer)); |
d5e35230 | 4824 | |
4c315bda RS |
4825 | if (CONSP (buffer->undo_list)) |
4826 | { | |
4827 | Lisp_Object tail; | |
4828 | tail = buffer->undo_list; | |
4829 | ||
4830 | while (CONSP (tail)) | |
4831 | { | |
4832 | register struct Lisp_Cons *ptr = XCONS (tail); | |
4833 | ||
4834 | if (XMARKBIT (ptr->car)) | |
4835 | break; | |
4836 | XMARK (ptr->car); | |
4837 | if (GC_CONSP (ptr->car) | |
70949dac KR |
4838 | && ! XMARKBIT (XCAR (ptr->car)) |
4839 | && GC_MARKERP (XCAR (ptr->car))) | |
4c315bda | 4840 | { |
f3fbd155 KR |
4841 | XMARK (XCAR_AS_LVALUE (ptr->car)); |
4842 | mark_object (&XCDR_AS_LVALUE (ptr->car)); | |
4c315bda RS |
4843 | } |
4844 | else | |
4845 | mark_object (&ptr->car); | |
4846 | ||
4847 | if (CONSP (ptr->cdr)) | |
4848 | tail = ptr->cdr; | |
4849 | else | |
4850 | break; | |
4851 | } | |
4852 | ||
f3fbd155 | 4853 | mark_object (&XCDR_AS_LVALUE (tail)); |
4c315bda RS |
4854 | } |
4855 | else | |
4856 | mark_object (&buffer->undo_list); | |
4857 | ||
7146af97 JB |
4858 | for (ptr = &buffer->name + 1; |
4859 | (char *)ptr < (char *)buffer + sizeof (struct buffer); | |
4860 | ptr++) | |
4861 | mark_object (ptr); | |
30e3190a RS |
4862 | |
4863 | /* If this is an indirect buffer, mark its base buffer. */ | |
6b552283 | 4864 | if (buffer->base_buffer && !XMARKBIT (buffer->base_buffer->name)) |
30e3190a RS |
4865 | { |
4866 | XSETBUFFER (base_buffer, buffer->base_buffer); | |
4867 | mark_buffer (base_buffer); | |
4868 | } | |
7146af97 | 4869 | } |
084b1a0c KH |
4870 | |
4871 | ||
b875d3f7 | 4872 | /* Mark the pointers in the kboard objects. */ |
084b1a0c KH |
4873 | |
4874 | static void | |
b875d3f7 | 4875 | mark_kboards () |
084b1a0c | 4876 | { |
b875d3f7 | 4877 | KBOARD *kb; |
b94daf1e | 4878 | Lisp_Object *p; |
b875d3f7 | 4879 | for (kb = all_kboards; kb; kb = kb->next_kboard) |
084b1a0c | 4880 | { |
b94daf1e KH |
4881 | if (kb->kbd_macro_buffer) |
4882 | for (p = kb->kbd_macro_buffer; p < kb->kbd_macro_ptr; p++) | |
4883 | mark_object (p); | |
4bfd0c4f RS |
4884 | mark_object (&kb->Voverriding_terminal_local_map); |
4885 | mark_object (&kb->Vlast_command); | |
4886 | mark_object (&kb->Vreal_last_command); | |
9671abc2 | 4887 | mark_object (&kb->Vprefix_arg); |
23c73c16 | 4888 | mark_object (&kb->Vlast_prefix_arg); |
b875d3f7 | 4889 | mark_object (&kb->kbd_queue); |
4bfd0c4f | 4890 | mark_object (&kb->defining_kbd_macro); |
b875d3f7 | 4891 | mark_object (&kb->Vlast_kbd_macro); |
b94daf1e | 4892 | mark_object (&kb->Vsystem_key_alist); |
6d03a6fd | 4893 | mark_object (&kb->system_key_syms); |
4bfd0c4f | 4894 | mark_object (&kb->Vdefault_minibuffer_frame); |
e60b0c44 | 4895 | mark_object (&kb->echo_string); |
084b1a0c KH |
4896 | } |
4897 | } | |
41c28a37 GM |
4898 | |
4899 | ||
4900 | /* Value is non-zero if OBJ will survive the current GC because it's | |
4901 | either marked or does not need to be marked to survive. */ | |
4902 | ||
4903 | int | |
4904 | survives_gc_p (obj) | |
4905 | Lisp_Object obj; | |
4906 | { | |
4907 | int survives_p; | |
4908 | ||
4909 | switch (XGCTYPE (obj)) | |
4910 | { | |
4911 | case Lisp_Int: | |
4912 | survives_p = 1; | |
4913 | break; | |
4914 | ||
4915 | case Lisp_Symbol: | |
4916 | survives_p = XMARKBIT (XSYMBOL (obj)->plist); | |
4917 | break; | |
4918 | ||
4919 | case Lisp_Misc: | |
4920 | switch (XMISCTYPE (obj)) | |
4921 | { | |
4922 | case Lisp_Misc_Marker: | |
4923 | survives_p = XMARKBIT (obj); | |
4924 | break; | |
4925 | ||
4926 | case Lisp_Misc_Buffer_Local_Value: | |
4927 | case Lisp_Misc_Some_Buffer_Local_Value: | |
4928 | survives_p = XMARKBIT (XBUFFER_LOCAL_VALUE (obj)->realvalue); | |
4929 | break; | |
4930 | ||
4931 | case Lisp_Misc_Intfwd: | |
4932 | case Lisp_Misc_Boolfwd: | |
4933 | case Lisp_Misc_Objfwd: | |
4934 | case Lisp_Misc_Buffer_Objfwd: | |
4935 | case Lisp_Misc_Kboard_Objfwd: | |
4936 | survives_p = 1; | |
4937 | break; | |
4938 | ||
4939 | case Lisp_Misc_Overlay: | |
4940 | survives_p = XMARKBIT (XOVERLAY (obj)->plist); | |
4941 | break; | |
4942 | ||
4943 | default: | |
4944 | abort (); | |
4945 | } | |
4946 | break; | |
4947 | ||
4948 | case Lisp_String: | |
4949 | { | |
4950 | struct Lisp_String *s = XSTRING (obj); | |
2e471eb5 | 4951 | survives_p = STRING_MARKED_P (s); |
41c28a37 GM |
4952 | } |
4953 | break; | |
4954 | ||
4955 | case Lisp_Vectorlike: | |
4956 | if (GC_BUFFERP (obj)) | |
4957 | survives_p = XMARKBIT (XBUFFER (obj)->name); | |
4958 | else if (GC_SUBRP (obj)) | |
4959 | survives_p = 1; | |
4960 | else | |
4961 | survives_p = XVECTOR (obj)->size & ARRAY_MARK_FLAG; | |
4962 | break; | |
4963 | ||
4964 | case Lisp_Cons: | |
4965 | survives_p = XMARKBIT (XCAR (obj)); | |
4966 | break; | |
4967 | ||
41c28a37 GM |
4968 | case Lisp_Float: |
4969 | survives_p = XMARKBIT (XFLOAT (obj)->type); | |
4970 | break; | |
41c28a37 GM |
4971 | |
4972 | default: | |
4973 | abort (); | |
4974 | } | |
4975 | ||
34400008 | 4976 | return survives_p || PURE_POINTER_P ((void *) XPNTR (obj)); |
41c28a37 GM |
4977 | } |
4978 | ||
4979 | ||
7146af97 | 4980 | \f |
1a4f1e2c | 4981 | /* Sweep: find all structures not marked, and free them. */ |
7146af97 JB |
4982 | |
4983 | static void | |
4984 | gc_sweep () | |
4985 | { | |
41c28a37 GM |
4986 | /* Remove or mark entries in weak hash tables. |
4987 | This must be done before any object is unmarked. */ | |
4988 | sweep_weak_hash_tables (); | |
4989 | ||
2e471eb5 | 4990 | sweep_strings (); |
676a7251 GM |
4991 | #ifdef GC_CHECK_STRING_BYTES |
4992 | if (!noninteractive) | |
4993 | check_string_bytes (1); | |
4994 | #endif | |
7146af97 JB |
4995 | |
4996 | /* Put all unmarked conses on free list */ | |
4997 | { | |
4998 | register struct cons_block *cblk; | |
6ca94ac9 | 4999 | struct cons_block **cprev = &cons_block; |
7146af97 JB |
5000 | register int lim = cons_block_index; |
5001 | register int num_free = 0, num_used = 0; | |
5002 | ||
5003 | cons_free_list = 0; | |
5004 | ||
6ca94ac9 | 5005 | for (cblk = cons_block; cblk; cblk = *cprev) |
7146af97 JB |
5006 | { |
5007 | register int i; | |
6ca94ac9 | 5008 | int this_free = 0; |
7146af97 JB |
5009 | for (i = 0; i < lim; i++) |
5010 | if (!XMARKBIT (cblk->conses[i].car)) | |
5011 | { | |
6ca94ac9 | 5012 | this_free++; |
1cd5fe6a | 5013 | *(struct Lisp_Cons **)&cblk->conses[i].cdr = cons_free_list; |
7146af97 | 5014 | cons_free_list = &cblk->conses[i]; |
34400008 GM |
5015 | #if GC_MARK_STACK |
5016 | cons_free_list->car = Vdead; | |
5017 | #endif | |
7146af97 JB |
5018 | } |
5019 | else | |
5020 | { | |
5021 | num_used++; | |
5022 | XUNMARK (cblk->conses[i].car); | |
5023 | } | |
5024 | lim = CONS_BLOCK_SIZE; | |
6ca94ac9 KH |
5025 | /* If this block contains only free conses and we have already |
5026 | seen more than two blocks worth of free conses then deallocate | |
5027 | this block. */ | |
6feef451 | 5028 | if (this_free == CONS_BLOCK_SIZE && num_free > CONS_BLOCK_SIZE) |
6ca94ac9 | 5029 | { |
6ca94ac9 KH |
5030 | *cprev = cblk->next; |
5031 | /* Unhook from the free list. */ | |
5032 | cons_free_list = *(struct Lisp_Cons **) &cblk->conses[0].cdr; | |
c8099634 RS |
5033 | lisp_free (cblk); |
5034 | n_cons_blocks--; | |
6ca94ac9 KH |
5035 | } |
5036 | else | |
6feef451 AS |
5037 | { |
5038 | num_free += this_free; | |
5039 | cprev = &cblk->next; | |
5040 | } | |
7146af97 JB |
5041 | } |
5042 | total_conses = num_used; | |
5043 | total_free_conses = num_free; | |
5044 | } | |
5045 | ||
7146af97 JB |
5046 | /* Put all unmarked floats on free list */ |
5047 | { | |
5048 | register struct float_block *fblk; | |
6ca94ac9 | 5049 | struct float_block **fprev = &float_block; |
7146af97 JB |
5050 | register int lim = float_block_index; |
5051 | register int num_free = 0, num_used = 0; | |
5052 | ||
5053 | float_free_list = 0; | |
5054 | ||
6ca94ac9 | 5055 | for (fblk = float_block; fblk; fblk = *fprev) |
7146af97 JB |
5056 | { |
5057 | register int i; | |
6ca94ac9 | 5058 | int this_free = 0; |
7146af97 JB |
5059 | for (i = 0; i < lim; i++) |
5060 | if (!XMARKBIT (fblk->floats[i].type)) | |
5061 | { | |
6ca94ac9 | 5062 | this_free++; |
1cd5fe6a | 5063 | *(struct Lisp_Float **)&fblk->floats[i].data = float_free_list; |
7146af97 | 5064 | float_free_list = &fblk->floats[i]; |
34400008 GM |
5065 | #if GC_MARK_STACK |
5066 | float_free_list->type = Vdead; | |
5067 | #endif | |
7146af97 JB |
5068 | } |
5069 | else | |
5070 | { | |
5071 | num_used++; | |
5072 | XUNMARK (fblk->floats[i].type); | |
5073 | } | |
5074 | lim = FLOAT_BLOCK_SIZE; | |
6ca94ac9 KH |
5075 | /* If this block contains only free floats and we have already |
5076 | seen more than two blocks worth of free floats then deallocate | |
5077 | this block. */ | |
6feef451 | 5078 | if (this_free == FLOAT_BLOCK_SIZE && num_free > FLOAT_BLOCK_SIZE) |
6ca94ac9 | 5079 | { |
6ca94ac9 KH |
5080 | *fprev = fblk->next; |
5081 | /* Unhook from the free list. */ | |
5082 | float_free_list = *(struct Lisp_Float **) &fblk->floats[0].data; | |
c8099634 RS |
5083 | lisp_free (fblk); |
5084 | n_float_blocks--; | |
6ca94ac9 KH |
5085 | } |
5086 | else | |
6feef451 AS |
5087 | { |
5088 | num_free += this_free; | |
5089 | fprev = &fblk->next; | |
5090 | } | |
7146af97 JB |
5091 | } |
5092 | total_floats = num_used; | |
5093 | total_free_floats = num_free; | |
5094 | } | |
7146af97 | 5095 | |
d5e35230 JA |
5096 | /* Put all unmarked intervals on free list */ |
5097 | { | |
5098 | register struct interval_block *iblk; | |
6ca94ac9 | 5099 | struct interval_block **iprev = &interval_block; |
d5e35230 JA |
5100 | register int lim = interval_block_index; |
5101 | register int num_free = 0, num_used = 0; | |
5102 | ||
5103 | interval_free_list = 0; | |
5104 | ||
6ca94ac9 | 5105 | for (iblk = interval_block; iblk; iblk = *iprev) |
d5e35230 JA |
5106 | { |
5107 | register int i; | |
6ca94ac9 | 5108 | int this_free = 0; |
d5e35230 JA |
5109 | |
5110 | for (i = 0; i < lim; i++) | |
5111 | { | |
5112 | if (! XMARKBIT (iblk->intervals[i].plist)) | |
5113 | { | |
439d5cb4 | 5114 | SET_INTERVAL_PARENT (&iblk->intervals[i], interval_free_list); |
d5e35230 | 5115 | interval_free_list = &iblk->intervals[i]; |
6ca94ac9 | 5116 | this_free++; |
d5e35230 JA |
5117 | } |
5118 | else | |
5119 | { | |
5120 | num_used++; | |
5121 | XUNMARK (iblk->intervals[i].plist); | |
5122 | } | |
5123 | } | |
5124 | lim = INTERVAL_BLOCK_SIZE; | |
6ca94ac9 KH |
5125 | /* If this block contains only free intervals and we have already |
5126 | seen more than two blocks worth of free intervals then | |
5127 | deallocate this block. */ | |
6feef451 | 5128 | if (this_free == INTERVAL_BLOCK_SIZE && num_free > INTERVAL_BLOCK_SIZE) |
6ca94ac9 | 5129 | { |
6ca94ac9 KH |
5130 | *iprev = iblk->next; |
5131 | /* Unhook from the free list. */ | |
439d5cb4 | 5132 | interval_free_list = INTERVAL_PARENT (&iblk->intervals[0]); |
c8099634 RS |
5133 | lisp_free (iblk); |
5134 | n_interval_blocks--; | |
6ca94ac9 KH |
5135 | } |
5136 | else | |
6feef451 AS |
5137 | { |
5138 | num_free += this_free; | |
5139 | iprev = &iblk->next; | |
5140 | } | |
d5e35230 JA |
5141 | } |
5142 | total_intervals = num_used; | |
5143 | total_free_intervals = num_free; | |
5144 | } | |
d5e35230 | 5145 | |
7146af97 JB |
5146 | /* Put all unmarked symbols on free list */ |
5147 | { | |
5148 | register struct symbol_block *sblk; | |
6ca94ac9 | 5149 | struct symbol_block **sprev = &symbol_block; |
7146af97 JB |
5150 | register int lim = symbol_block_index; |
5151 | register int num_free = 0, num_used = 0; | |
5152 | ||
d285b373 | 5153 | symbol_free_list = NULL; |
7146af97 | 5154 | |
6ca94ac9 | 5155 | for (sblk = symbol_block; sblk; sblk = *sprev) |
7146af97 | 5156 | { |
6ca94ac9 | 5157 | int this_free = 0; |
d285b373 GM |
5158 | struct Lisp_Symbol *sym = sblk->symbols; |
5159 | struct Lisp_Symbol *end = sym + lim; | |
5160 | ||
5161 | for (; sym < end; ++sym) | |
5162 | { | |
20035321 SM |
5163 | /* Check if the symbol was created during loadup. In such a case |
5164 | it might be pointed to by pure bytecode which we don't trace, | |
5165 | so we conservatively assume that it is live. */ | |
d285b373 GM |
5166 | int pure_p = PURE_POINTER_P (sym->name); |
5167 | ||
5168 | if (!XMARKBIT (sym->plist) && !pure_p) | |
5169 | { | |
5170 | *(struct Lisp_Symbol **) &sym->value = symbol_free_list; | |
5171 | symbol_free_list = sym; | |
34400008 | 5172 | #if GC_MARK_STACK |
d285b373 | 5173 | symbol_free_list->function = Vdead; |
34400008 | 5174 | #endif |
d285b373 GM |
5175 | ++this_free; |
5176 | } | |
5177 | else | |
5178 | { | |
5179 | ++num_used; | |
5180 | if (!pure_p) | |
5181 | UNMARK_STRING (sym->name); | |
5182 | XUNMARK (sym->plist); | |
5183 | } | |
5184 | } | |
5185 | ||
7146af97 | 5186 | lim = SYMBOL_BLOCK_SIZE; |
6ca94ac9 KH |
5187 | /* If this block contains only free symbols and we have already |
5188 | seen more than two blocks worth of free symbols then deallocate | |
5189 | this block. */ | |
6feef451 | 5190 | if (this_free == SYMBOL_BLOCK_SIZE && num_free > SYMBOL_BLOCK_SIZE) |
6ca94ac9 | 5191 | { |
6ca94ac9 KH |
5192 | *sprev = sblk->next; |
5193 | /* Unhook from the free list. */ | |
5194 | symbol_free_list = *(struct Lisp_Symbol **)&sblk->symbols[0].value; | |
c8099634 RS |
5195 | lisp_free (sblk); |
5196 | n_symbol_blocks--; | |
6ca94ac9 KH |
5197 | } |
5198 | else | |
6feef451 AS |
5199 | { |
5200 | num_free += this_free; | |
5201 | sprev = &sblk->next; | |
5202 | } | |
7146af97 JB |
5203 | } |
5204 | total_symbols = num_used; | |
5205 | total_free_symbols = num_free; | |
5206 | } | |
5207 | ||
a9faeabe RS |
5208 | /* Put all unmarked misc's on free list. |
5209 | For a marker, first unchain it from the buffer it points into. */ | |
7146af97 JB |
5210 | { |
5211 | register struct marker_block *mblk; | |
6ca94ac9 | 5212 | struct marker_block **mprev = &marker_block; |
7146af97 JB |
5213 | register int lim = marker_block_index; |
5214 | register int num_free = 0, num_used = 0; | |
5215 | ||
5216 | marker_free_list = 0; | |
5217 | ||
6ca94ac9 | 5218 | for (mblk = marker_block; mblk; mblk = *mprev) |
7146af97 JB |
5219 | { |
5220 | register int i; | |
6ca94ac9 | 5221 | int this_free = 0; |
26b926e1 | 5222 | EMACS_INT already_free = -1; |
fa05e253 | 5223 | |
7146af97 | 5224 | for (i = 0; i < lim; i++) |
465edf35 KH |
5225 | { |
5226 | Lisp_Object *markword; | |
a5da44fe | 5227 | switch (mblk->markers[i].u_marker.type) |
465edf35 KH |
5228 | { |
5229 | case Lisp_Misc_Marker: | |
5230 | markword = &mblk->markers[i].u_marker.chain; | |
5231 | break; | |
5232 | case Lisp_Misc_Buffer_Local_Value: | |
5233 | case Lisp_Misc_Some_Buffer_Local_Value: | |
a9faeabe | 5234 | markword = &mblk->markers[i].u_buffer_local_value.realvalue; |
465edf35 | 5235 | break; |
e202fa34 KH |
5236 | case Lisp_Misc_Overlay: |
5237 | markword = &mblk->markers[i].u_overlay.plist; | |
5238 | break; | |
fa05e253 RS |
5239 | case Lisp_Misc_Free: |
5240 | /* If the object was already free, keep it | |
5241 | on the free list. */ | |
74d84334 | 5242 | markword = (Lisp_Object *) &already_free; |
fa05e253 | 5243 | break; |
465edf35 KH |
5244 | default: |
5245 | markword = 0; | |
e202fa34 | 5246 | break; |
465edf35 KH |
5247 | } |
5248 | if (markword && !XMARKBIT (*markword)) | |
5249 | { | |
5250 | Lisp_Object tem; | |
a5da44fe | 5251 | if (mblk->markers[i].u_marker.type == Lisp_Misc_Marker) |
465edf35 KH |
5252 | { |
5253 | /* tem1 avoids Sun compiler bug */ | |
5254 | struct Lisp_Marker *tem1 = &mblk->markers[i].u_marker; | |
5255 | XSETMARKER (tem, tem1); | |
5256 | unchain_marker (tem); | |
5257 | } | |
fa05e253 RS |
5258 | /* Set the type of the freed object to Lisp_Misc_Free. |
5259 | We could leave the type alone, since nobody checks it, | |
465edf35 | 5260 | but this might catch bugs faster. */ |
a5da44fe | 5261 | mblk->markers[i].u_marker.type = Lisp_Misc_Free; |
465edf35 KH |
5262 | mblk->markers[i].u_free.chain = marker_free_list; |
5263 | marker_free_list = &mblk->markers[i]; | |
6ca94ac9 | 5264 | this_free++; |
465edf35 KH |
5265 | } |
5266 | else | |
5267 | { | |
5268 | num_used++; | |
5269 | if (markword) | |
5270 | XUNMARK (*markword); | |
5271 | } | |
5272 | } | |
7146af97 | 5273 | lim = MARKER_BLOCK_SIZE; |
6ca94ac9 KH |
5274 | /* If this block contains only free markers and we have already |
5275 | seen more than two blocks worth of free markers then deallocate | |
5276 | this block. */ | |
6feef451 | 5277 | if (this_free == MARKER_BLOCK_SIZE && num_free > MARKER_BLOCK_SIZE) |
6ca94ac9 | 5278 | { |
6ca94ac9 KH |
5279 | *mprev = mblk->next; |
5280 | /* Unhook from the free list. */ | |
5281 | marker_free_list = mblk->markers[0].u_free.chain; | |
c8099634 RS |
5282 | lisp_free (mblk); |
5283 | n_marker_blocks--; | |
6ca94ac9 KH |
5284 | } |
5285 | else | |
6feef451 AS |
5286 | { |
5287 | num_free += this_free; | |
5288 | mprev = &mblk->next; | |
5289 | } | |
7146af97 JB |
5290 | } |
5291 | ||
5292 | total_markers = num_used; | |
5293 | total_free_markers = num_free; | |
5294 | } | |
5295 | ||
5296 | /* Free all unmarked buffers */ | |
5297 | { | |
5298 | register struct buffer *buffer = all_buffers, *prev = 0, *next; | |
5299 | ||
5300 | while (buffer) | |
5301 | if (!XMARKBIT (buffer->name)) | |
5302 | { | |
5303 | if (prev) | |
5304 | prev->next = buffer->next; | |
5305 | else | |
5306 | all_buffers = buffer->next; | |
5307 | next = buffer->next; | |
34400008 | 5308 | lisp_free (buffer); |
7146af97 JB |
5309 | buffer = next; |
5310 | } | |
5311 | else | |
5312 | { | |
5313 | XUNMARK (buffer->name); | |
30e3190a | 5314 | UNMARK_BALANCE_INTERVALS (BUF_INTERVALS (buffer)); |
7146af97 JB |
5315 | prev = buffer, buffer = buffer->next; |
5316 | } | |
5317 | } | |
5318 | ||
7146af97 JB |
5319 | /* Free all unmarked vectors */ |
5320 | { | |
5321 | register struct Lisp_Vector *vector = all_vectors, *prev = 0, *next; | |
5322 | total_vector_size = 0; | |
5323 | ||
5324 | while (vector) | |
5325 | if (!(vector->size & ARRAY_MARK_FLAG)) | |
5326 | { | |
5327 | if (prev) | |
5328 | prev->next = vector->next; | |
5329 | else | |
5330 | all_vectors = vector->next; | |
5331 | next = vector->next; | |
c8099634 RS |
5332 | lisp_free (vector); |
5333 | n_vectors--; | |
7146af97 | 5334 | vector = next; |
41c28a37 | 5335 | |
7146af97 JB |
5336 | } |
5337 | else | |
5338 | { | |
5339 | vector->size &= ~ARRAY_MARK_FLAG; | |
fa05e253 RS |
5340 | if (vector->size & PSEUDOVECTOR_FLAG) |
5341 | total_vector_size += (PSEUDOVECTOR_SIZE_MASK & vector->size); | |
5342 | else | |
5343 | total_vector_size += vector->size; | |
7146af97 JB |
5344 | prev = vector, vector = vector->next; |
5345 | } | |
5346 | } | |
676a7251 GM |
5347 | |
5348 | #ifdef GC_CHECK_STRING_BYTES | |
5349 | if (!noninteractive) | |
5350 | check_string_bytes (1); | |
5351 | #endif | |
7146af97 | 5352 | } |
7146af97 | 5353 | |
7146af97 | 5354 | |
7146af97 | 5355 | |
7146af97 | 5356 | \f |
20d24714 JB |
5357 | /* Debugging aids. */ |
5358 | ||
31ce1c91 | 5359 | DEFUN ("memory-limit", Fmemory_limit, Smemory_limit, 0, 0, 0, |
a6266d23 | 5360 | doc: /* Return the address of the last byte Emacs has allocated, divided by 1024. |
228299fa | 5361 | This may be helpful in debugging Emacs's memory usage. |
7ee72033 MB |
5362 | We divide the value by 1024 to make sure it fits in a Lisp integer. */) |
5363 | () | |
20d24714 JB |
5364 | { |
5365 | Lisp_Object end; | |
5366 | ||
45d12a89 | 5367 | XSETINT (end, (EMACS_INT) sbrk (0) / 1024); |
20d24714 JB |
5368 | |
5369 | return end; | |
5370 | } | |
5371 | ||
310ea200 | 5372 | DEFUN ("memory-use-counts", Fmemory_use_counts, Smemory_use_counts, 0, 0, 0, |
a6266d23 | 5373 | doc: /* Return a list of counters that measure how much consing there has been. |
228299fa GM |
5374 | Each of these counters increments for a certain kind of object. |
5375 | The counters wrap around from the largest positive integer to zero. | |
5376 | Garbage collection does not decrease them. | |
5377 | The elements of the value are as follows: | |
5378 | (CONSES FLOATS VECTOR-CELLS SYMBOLS STRING-CHARS MISCS INTERVALS STRINGS) | |
5379 | All are in units of 1 = one object consed | |
5380 | except for VECTOR-CELLS and STRING-CHARS, which count the total length of | |
5381 | objects consed. | |
5382 | MISCS include overlays, markers, and some internal types. | |
5383 | Frames, windows, buffers, and subprocesses count as vectors | |
7ee72033 MB |
5384 | (but the contents of a buffer's text do not count here). */) |
5385 | () | |
310ea200 | 5386 | { |
2e471eb5 | 5387 | Lisp_Object consed[8]; |
310ea200 | 5388 | |
78e985eb GM |
5389 | consed[0] = make_number (min (MOST_POSITIVE_FIXNUM, cons_cells_consed)); |
5390 | consed[1] = make_number (min (MOST_POSITIVE_FIXNUM, floats_consed)); | |
5391 | consed[2] = make_number (min (MOST_POSITIVE_FIXNUM, vector_cells_consed)); | |
5392 | consed[3] = make_number (min (MOST_POSITIVE_FIXNUM, symbols_consed)); | |
5393 | consed[4] = make_number (min (MOST_POSITIVE_FIXNUM, string_chars_consed)); | |
5394 | consed[5] = make_number (min (MOST_POSITIVE_FIXNUM, misc_objects_consed)); | |
5395 | consed[6] = make_number (min (MOST_POSITIVE_FIXNUM, intervals_consed)); | |
5396 | consed[7] = make_number (min (MOST_POSITIVE_FIXNUM, strings_consed)); | |
310ea200 | 5397 | |
2e471eb5 | 5398 | return Flist (8, consed); |
310ea200 | 5399 | } |
e0b8c689 KR |
5400 | |
5401 | int suppress_checking; | |
5402 | void | |
5403 | die (msg, file, line) | |
5404 | const char *msg; | |
5405 | const char *file; | |
5406 | int line; | |
5407 | { | |
5408 | fprintf (stderr, "\r\nEmacs fatal error: %s:%d: %s\r\n", | |
5409 | file, line, msg); | |
5410 | abort (); | |
5411 | } | |
20d24714 | 5412 | \f |
7146af97 JB |
5413 | /* Initialization */ |
5414 | ||
dfcf069d | 5415 | void |
7146af97 JB |
5416 | init_alloc_once () |
5417 | { | |
5418 | /* Used to do Vpurify_flag = Qt here, but Qt isn't set up yet! */ | |
9e713715 GM |
5419 | purebeg = PUREBEG; |
5420 | pure_size = PURESIZE; | |
1f0b3fd2 | 5421 | pure_bytes_used = 0; |
9e713715 GM |
5422 | pure_bytes_used_before_overflow = 0; |
5423 | ||
877935b1 | 5424 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
34400008 GM |
5425 | mem_init (); |
5426 | Vdead = make_pure_string ("DEAD", 4, 4, 0); | |
5427 | #endif | |
9e713715 | 5428 | |
7146af97 JB |
5429 | all_vectors = 0; |
5430 | ignore_warnings = 1; | |
d1658221 RS |
5431 | #ifdef DOUG_LEA_MALLOC |
5432 | mallopt (M_TRIM_THRESHOLD, 128*1024); /* trim threshold */ | |
5433 | mallopt (M_MMAP_THRESHOLD, 64*1024); /* mmap threshold */ | |
81d492d5 | 5434 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); /* max. number of mmap'ed areas */ |
d1658221 | 5435 | #endif |
7146af97 JB |
5436 | init_strings (); |
5437 | init_cons (); | |
5438 | init_symbol (); | |
5439 | init_marker (); | |
7146af97 | 5440 | init_float (); |
34400008 | 5441 | init_intervals (); |
d5e35230 | 5442 | |
276cbe5a RS |
5443 | #ifdef REL_ALLOC |
5444 | malloc_hysteresis = 32; | |
5445 | #else | |
5446 | malloc_hysteresis = 0; | |
5447 | #endif | |
5448 | ||
5449 | spare_memory = (char *) malloc (SPARE_MEMORY); | |
5450 | ||
7146af97 JB |
5451 | ignore_warnings = 0; |
5452 | gcprolist = 0; | |
630686c8 | 5453 | byte_stack_list = 0; |
7146af97 JB |
5454 | staticidx = 0; |
5455 | consing_since_gc = 0; | |
7d179cea | 5456 | gc_cons_threshold = 100000 * sizeof (Lisp_Object); |
7146af97 JB |
5457 | #ifdef VIRT_ADDR_VARIES |
5458 | malloc_sbrk_unused = 1<<22; /* A large number */ | |
5459 | malloc_sbrk_used = 100000; /* as reasonable as any number */ | |
5460 | #endif /* VIRT_ADDR_VARIES */ | |
5461 | } | |
5462 | ||
dfcf069d | 5463 | void |
7146af97 JB |
5464 | init_alloc () |
5465 | { | |
5466 | gcprolist = 0; | |
630686c8 | 5467 | byte_stack_list = 0; |
182ff242 GM |
5468 | #if GC_MARK_STACK |
5469 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
5470 | setjmp_tested_p = longjmps_done = 0; | |
5471 | #endif | |
5472 | #endif | |
7146af97 JB |
5473 | } |
5474 | ||
5475 | void | |
5476 | syms_of_alloc () | |
5477 | { | |
7ee72033 | 5478 | DEFVAR_INT ("gc-cons-threshold", &gc_cons_threshold, |
a6266d23 | 5479 | doc: /* *Number of bytes of consing between garbage collections. |
228299fa GM |
5480 | Garbage collection can happen automatically once this many bytes have been |
5481 | allocated since the last garbage collection. All data types count. | |
7146af97 | 5482 | |
228299fa | 5483 | Garbage collection happens automatically only when `eval' is called. |
7146af97 | 5484 | |
228299fa GM |
5485 | By binding this temporarily to a large number, you can effectively |
5486 | prevent garbage collection during a part of the program. */); | |
0819585c | 5487 | |
7ee72033 | 5488 | DEFVAR_INT ("pure-bytes-used", &pure_bytes_used, |
a6266d23 | 5489 | doc: /* Number of bytes of sharable Lisp data allocated so far. */); |
0819585c | 5490 | |
7ee72033 | 5491 | DEFVAR_INT ("cons-cells-consed", &cons_cells_consed, |
a6266d23 | 5492 | doc: /* Number of cons cells that have been consed so far. */); |
0819585c | 5493 | |
7ee72033 | 5494 | DEFVAR_INT ("floats-consed", &floats_consed, |
a6266d23 | 5495 | doc: /* Number of floats that have been consed so far. */); |
0819585c | 5496 | |
7ee72033 | 5497 | DEFVAR_INT ("vector-cells-consed", &vector_cells_consed, |
a6266d23 | 5498 | doc: /* Number of vector cells that have been consed so far. */); |
0819585c | 5499 | |
7ee72033 | 5500 | DEFVAR_INT ("symbols-consed", &symbols_consed, |
a6266d23 | 5501 | doc: /* Number of symbols that have been consed so far. */); |
0819585c | 5502 | |
7ee72033 | 5503 | DEFVAR_INT ("string-chars-consed", &string_chars_consed, |
a6266d23 | 5504 | doc: /* Number of string characters that have been consed so far. */); |
0819585c | 5505 | |
7ee72033 | 5506 | DEFVAR_INT ("misc-objects-consed", &misc_objects_consed, |
a6266d23 | 5507 | doc: /* Number of miscellaneous objects that have been consed so far. */); |
2e471eb5 | 5508 | |
7ee72033 | 5509 | DEFVAR_INT ("intervals-consed", &intervals_consed, |
a6266d23 | 5510 | doc: /* Number of intervals that have been consed so far. */); |
7146af97 | 5511 | |
7ee72033 | 5512 | DEFVAR_INT ("strings-consed", &strings_consed, |
a6266d23 | 5513 | doc: /* Number of strings that have been consed so far. */); |
228299fa | 5514 | |
7ee72033 | 5515 | DEFVAR_LISP ("purify-flag", &Vpurify_flag, |
a6266d23 | 5516 | doc: /* Non-nil means loading Lisp code in order to dump an executable. |
228299fa GM |
5517 | This means that certain objects should be allocated in shared (pure) space. */); |
5518 | ||
7ee72033 | 5519 | DEFVAR_INT ("undo-limit", &undo_limit, |
a6266d23 | 5520 | doc: /* Keep no more undo information once it exceeds this size. |
228299fa GM |
5521 | This limit is applied when garbage collection happens. |
5522 | The size is counted as the number of bytes occupied, | |
5523 | which includes both saved text and other data. */); | |
502b9b64 | 5524 | undo_limit = 20000; |
7146af97 | 5525 | |
7ee72033 | 5526 | DEFVAR_INT ("undo-strong-limit", &undo_strong_limit, |
a6266d23 | 5527 | doc: /* Don't keep more than this much size of undo information. |
228299fa GM |
5528 | A command which pushes past this size is itself forgotten. |
5529 | This limit is applied when garbage collection happens. | |
5530 | The size is counted as the number of bytes occupied, | |
5531 | which includes both saved text and other data. */); | |
502b9b64 | 5532 | undo_strong_limit = 30000; |
7146af97 | 5533 | |
7ee72033 | 5534 | DEFVAR_BOOL ("garbage-collection-messages", &garbage_collection_messages, |
a6266d23 | 5535 | doc: /* Non-nil means display messages at start and end of garbage collection. */); |
299585ee RS |
5536 | garbage_collection_messages = 0; |
5537 | ||
7ee72033 | 5538 | DEFVAR_LISP ("post-gc-hook", &Vpost_gc_hook, |
a6266d23 | 5539 | doc: /* Hook run after garbage collection has finished. */); |
9e713715 GM |
5540 | Vpost_gc_hook = Qnil; |
5541 | Qpost_gc_hook = intern ("post-gc-hook"); | |
5542 | staticpro (&Qpost_gc_hook); | |
5543 | ||
bcb61d60 KH |
5544 | /* We build this in advance because if we wait until we need it, we might |
5545 | not be able to allocate the memory to hold it. */ | |
cf3540e4 | 5546 | memory_signal_data |
276cbe5a | 5547 | = Fcons (Qerror, Fcons (build_string ("Memory exhausted--use M-x save-some-buffers RET"), Qnil)); |
bcb61d60 KH |
5548 | staticpro (&memory_signal_data); |
5549 | ||
e8197642 RS |
5550 | staticpro (&Qgc_cons_threshold); |
5551 | Qgc_cons_threshold = intern ("gc-cons-threshold"); | |
5552 | ||
a59de17b RS |
5553 | staticpro (&Qchar_table_extra_slots); |
5554 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
5555 | ||
7146af97 JB |
5556 | defsubr (&Scons); |
5557 | defsubr (&Slist); | |
5558 | defsubr (&Svector); | |
5559 | defsubr (&Smake_byte_code); | |
5560 | defsubr (&Smake_list); | |
5561 | defsubr (&Smake_vector); | |
7b07587b | 5562 | defsubr (&Smake_char_table); |
7146af97 | 5563 | defsubr (&Smake_string); |
7b07587b | 5564 | defsubr (&Smake_bool_vector); |
7146af97 JB |
5565 | defsubr (&Smake_symbol); |
5566 | defsubr (&Smake_marker); | |
5567 | defsubr (&Spurecopy); | |
5568 | defsubr (&Sgarbage_collect); | |
20d24714 | 5569 | defsubr (&Smemory_limit); |
310ea200 | 5570 | defsubr (&Smemory_use_counts); |
34400008 GM |
5571 | |
5572 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
5573 | defsubr (&Sgc_status); | |
5574 | #endif | |
7146af97 | 5575 | } |