Commit | Line | Data |
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7146af97 | 1 | /* Storage allocation and gc for GNU Emacs Lisp interpreter. |
98edb5ff | 2 | Copyright (C) 1985, 86, 88, 93, 94, 95, 97, 98, 1999, 2000, 2001 |
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" |
d5e35230 | 42 | #include "intervals.h" |
4c0be5f4 | 43 | #include "puresize.h" |
7146af97 JB |
44 | #include "buffer.h" |
45 | #include "window.h" | |
2538fae4 | 46 | #include "keyboard.h" |
502b9b64 | 47 | #include "frame.h" |
9ac0d9e0 | 48 | #include "blockinput.h" |
e54daa22 | 49 | #include "charset.h" |
e065a56e | 50 | #include "syssignal.h" |
34400008 | 51 | #include <setjmp.h> |
e065a56e | 52 | |
bf952fb6 DL |
53 | #ifdef HAVE_UNISTD_H |
54 | #include <unistd.h> | |
55 | #else | |
56 | extern POINTER_TYPE *sbrk (); | |
57 | #endif | |
ee1eea5c | 58 | |
d1658221 | 59 | #ifdef DOUG_LEA_MALLOC |
2e471eb5 | 60 | |
d1658221 | 61 | #include <malloc.h> |
3e60b029 DL |
62 | /* malloc.h #defines this as size_t, at least in glibc2. */ |
63 | #ifndef __malloc_size_t | |
d1658221 | 64 | #define __malloc_size_t int |
3e60b029 | 65 | #endif |
81d492d5 | 66 | |
2e471eb5 GM |
67 | /* Specify maximum number of areas to mmap. It would be nice to use a |
68 | value that explicitly means "no limit". */ | |
69 | ||
81d492d5 RS |
70 | #define MMAP_MAX_AREAS 100000000 |
71 | ||
2e471eb5 GM |
72 | #else /* not DOUG_LEA_MALLOC */ |
73 | ||
276cbe5a RS |
74 | /* The following come from gmalloc.c. */ |
75 | ||
276cbe5a | 76 | #define __malloc_size_t size_t |
276cbe5a | 77 | extern __malloc_size_t _bytes_used; |
3e60b029 | 78 | extern __malloc_size_t __malloc_extra_blocks; |
2e471eb5 GM |
79 | |
80 | #endif /* not DOUG_LEA_MALLOC */ | |
276cbe5a | 81 | |
7146af97 | 82 | #define max(A,B) ((A) > (B) ? (A) : (B)) |
b580578b | 83 | #define min(A,B) ((A) < (B) ? (A) : (B)) |
7146af97 JB |
84 | |
85 | /* Macro to verify that storage intended for Lisp objects is not | |
86 | out of range to fit in the space for a pointer. | |
87 | ADDRESS is the start of the block, and SIZE | |
88 | is the amount of space within which objects can start. */ | |
2e471eb5 | 89 | |
7146af97 JB |
90 | #define VALIDATE_LISP_STORAGE(address, size) \ |
91 | do \ | |
92 | { \ | |
93 | Lisp_Object val; \ | |
45d12a89 | 94 | XSETCONS (val, (char *) address + size); \ |
7146af97 JB |
95 | if ((char *) XCONS (val) != (char *) address + size) \ |
96 | { \ | |
9ac0d9e0 | 97 | xfree (address); \ |
7146af97 JB |
98 | memory_full (); \ |
99 | } \ | |
100 | } while (0) | |
101 | ||
276cbe5a | 102 | /* Value of _bytes_used, when spare_memory was freed. */ |
2e471eb5 | 103 | |
276cbe5a RS |
104 | static __malloc_size_t bytes_used_when_full; |
105 | ||
2e471eb5 GM |
106 | /* Mark, unmark, query mark bit of a Lisp string. S must be a pointer |
107 | to a struct Lisp_String. */ | |
108 | ||
cc2d8c6b KR |
109 | #define MARK_STRING(S) ((S)->size |= MARKBIT) |
110 | #define UNMARK_STRING(S) ((S)->size &= ~MARKBIT) | |
111 | #define STRING_MARKED_P(S) ((S)->size & MARKBIT) | |
2e471eb5 GM |
112 | |
113 | /* Value is the number of bytes/chars of S, a pointer to a struct | |
114 | Lisp_String. This must be used instead of STRING_BYTES (S) or | |
115 | S->size during GC, because S->size contains the mark bit for | |
116 | strings. */ | |
117 | ||
118 | #define GC_STRING_BYTES(S) (STRING_BYTES (S) & ~MARKBIT) | |
119 | #define GC_STRING_CHARS(S) ((S)->size & ~MARKBIT) | |
120 | ||
121 | /* Number of bytes of consing done since the last gc. */ | |
122 | ||
7146af97 JB |
123 | int consing_since_gc; |
124 | ||
310ea200 | 125 | /* Count the amount of consing of various sorts of space. */ |
2e471eb5 | 126 | |
310ea200 RS |
127 | int cons_cells_consed; |
128 | int floats_consed; | |
129 | int vector_cells_consed; | |
130 | int symbols_consed; | |
131 | int string_chars_consed; | |
132 | int misc_objects_consed; | |
133 | int intervals_consed; | |
2e471eb5 GM |
134 | int strings_consed; |
135 | ||
136 | /* Number of bytes of consing since GC before another GC should be done. */ | |
310ea200 | 137 | |
b580578b | 138 | int gc_cons_threshold; |
7146af97 | 139 | |
2e471eb5 GM |
140 | /* Nonzero during GC. */ |
141 | ||
7146af97 JB |
142 | int gc_in_progress; |
143 | ||
299585ee | 144 | /* Nonzero means display messages at beginning and end of GC. */ |
2e471eb5 | 145 | |
299585ee RS |
146 | int garbage_collection_messages; |
147 | ||
7146af97 JB |
148 | #ifndef VIRT_ADDR_VARIES |
149 | extern | |
150 | #endif /* VIRT_ADDR_VARIES */ | |
2e471eb5 | 151 | int malloc_sbrk_used; |
7146af97 JB |
152 | |
153 | #ifndef VIRT_ADDR_VARIES | |
154 | extern | |
155 | #endif /* VIRT_ADDR_VARIES */ | |
2e471eb5 | 156 | int malloc_sbrk_unused; |
7146af97 | 157 | |
502b9b64 | 158 | /* Two limits controlling how much undo information to keep. */ |
2e471eb5 | 159 | |
502b9b64 JB |
160 | int undo_limit; |
161 | int undo_strong_limit; | |
7146af97 | 162 | |
34400008 GM |
163 | /* Number of live and free conses etc. */ |
164 | ||
165 | static int total_conses, total_markers, total_symbols, total_vector_size; | |
166 | static int total_free_conses, total_free_markers, total_free_symbols; | |
167 | static int total_free_floats, total_floats; | |
fd27a537 | 168 | |
2e471eb5 GM |
169 | /* Points to memory space allocated as "spare", to be freed if we run |
170 | out of memory. */ | |
171 | ||
276cbe5a RS |
172 | static char *spare_memory; |
173 | ||
174 | /* Amount of spare memory to keep in reserve. */ | |
2e471eb5 | 175 | |
276cbe5a RS |
176 | #define SPARE_MEMORY (1 << 14) |
177 | ||
178 | /* Number of extra blocks malloc should get when it needs more core. */ | |
2e471eb5 | 179 | |
276cbe5a RS |
180 | static int malloc_hysteresis; |
181 | ||
2e471eb5 GM |
182 | /* Non-nil means defun should do purecopy on the function definition. */ |
183 | ||
7146af97 JB |
184 | Lisp_Object Vpurify_flag; |
185 | ||
186 | #ifndef HAVE_SHM | |
2e471eb5 GM |
187 | |
188 | /* Force it into data space! */ | |
189 | ||
190 | EMACS_INT pure[PURESIZE / sizeof (EMACS_INT)] = {0,}; | |
7146af97 | 191 | #define PUREBEG (char *) pure |
2e471eb5 GM |
192 | |
193 | #else /* not HAVE_SHM */ | |
194 | ||
7146af97 JB |
195 | #define pure PURE_SEG_BITS /* Use shared memory segment */ |
196 | #define PUREBEG (char *)PURE_SEG_BITS | |
4c0be5f4 JB |
197 | |
198 | /* This variable is used only by the XPNTR macro when HAVE_SHM is | |
199 | defined. If we used the PURESIZE macro directly there, that would | |
2e471eb5 | 200 | make most of Emacs dependent on puresize.h, which we don't want - |
4c0be5f4 JB |
201 | you should be able to change that without too much recompilation. |
202 | So map_in_data initializes pure_size, and the dependencies work | |
203 | out. */ | |
2e471eb5 | 204 | |
42607681 | 205 | EMACS_INT pure_size; |
2e471eb5 | 206 | |
7146af97 JB |
207 | #endif /* not HAVE_SHM */ |
208 | ||
34400008 GM |
209 | /* Value is non-zero if P points into pure space. */ |
210 | ||
211 | #define PURE_POINTER_P(P) \ | |
212 | (((PNTR_COMPARISON_TYPE) (P) \ | |
213 | < (PNTR_COMPARISON_TYPE) ((char *) pure + PURESIZE)) \ | |
214 | && ((PNTR_COMPARISON_TYPE) (P) \ | |
215 | >= (PNTR_COMPARISON_TYPE) pure)) | |
216 | ||
2e471eb5 GM |
217 | /* Index in pure at which next pure object will be allocated.. */ |
218 | ||
1f0b3fd2 | 219 | int pure_bytes_used; |
7146af97 | 220 | |
2e471eb5 GM |
221 | /* If nonzero, this is a warning delivered by malloc and not yet |
222 | displayed. */ | |
223 | ||
7146af97 JB |
224 | char *pending_malloc_warning; |
225 | ||
bcb61d60 | 226 | /* Pre-computed signal argument for use when memory is exhausted. */ |
2e471eb5 | 227 | |
cf3540e4 | 228 | Lisp_Object memory_signal_data; |
bcb61d60 | 229 | |
7146af97 JB |
230 | /* Maximum amount of C stack to save when a GC happens. */ |
231 | ||
232 | #ifndef MAX_SAVE_STACK | |
233 | #define MAX_SAVE_STACK 16000 | |
234 | #endif | |
235 | ||
236 | /* Buffer in which we save a copy of the C stack at each GC. */ | |
237 | ||
238 | char *stack_copy; | |
239 | int stack_copy_size; | |
240 | ||
2e471eb5 GM |
241 | /* Non-zero means ignore malloc warnings. Set during initialization. |
242 | Currently not used. */ | |
243 | ||
7146af97 | 244 | int ignore_warnings; |
350273a4 | 245 | |
a59de17b | 246 | Lisp_Object Qgc_cons_threshold, Qchar_table_extra_slots; |
e8197642 | 247 | |
2e471eb5 GM |
248 | static void mark_buffer P_ ((Lisp_Object)); |
249 | static void mark_kboards P_ ((void)); | |
250 | static void gc_sweep P_ ((void)); | |
41c28a37 GM |
251 | static void mark_glyph_matrix P_ ((struct glyph_matrix *)); |
252 | static void mark_face_cache P_ ((struct face_cache *)); | |
253 | ||
254 | #ifdef HAVE_WINDOW_SYSTEM | |
255 | static void mark_image P_ ((struct image *)); | |
256 | static void mark_image_cache P_ ((struct frame *)); | |
257 | #endif /* HAVE_WINDOW_SYSTEM */ | |
258 | ||
2e471eb5 GM |
259 | static struct Lisp_String *allocate_string P_ ((void)); |
260 | static void compact_small_strings P_ ((void)); | |
261 | static void free_large_strings P_ ((void)); | |
262 | static void sweep_strings P_ ((void)); | |
7da0b0d3 RS |
263 | |
264 | extern int message_enable_multibyte; | |
34400008 | 265 | |
34400008 GM |
266 | /* When scanning the C stack for live Lisp objects, Emacs keeps track |
267 | of what memory allocated via lisp_malloc is intended for what | |
268 | purpose. This enumeration specifies the type of memory. */ | |
269 | ||
270 | enum mem_type | |
271 | { | |
272 | MEM_TYPE_NON_LISP, | |
273 | MEM_TYPE_BUFFER, | |
274 | MEM_TYPE_CONS, | |
275 | MEM_TYPE_STRING, | |
276 | MEM_TYPE_MISC, | |
277 | MEM_TYPE_SYMBOL, | |
278 | MEM_TYPE_FLOAT, | |
279 | MEM_TYPE_VECTOR | |
280 | }; | |
281 | ||
877935b1 | 282 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
0b378936 GM |
283 | |
284 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
285 | #include <stdio.h> /* For fprintf. */ | |
286 | #endif | |
287 | ||
288 | /* A unique object in pure space used to make some Lisp objects | |
289 | on free lists recognizable in O(1). */ | |
290 | ||
291 | Lisp_Object Vdead; | |
292 | ||
877935b1 GM |
293 | #ifdef GC_MALLOC_CHECK |
294 | ||
295 | enum mem_type allocated_mem_type; | |
296 | int dont_register_blocks; | |
297 | ||
298 | #endif /* GC_MALLOC_CHECK */ | |
299 | ||
300 | /* A node in the red-black tree describing allocated memory containing | |
301 | Lisp data. Each such block is recorded with its start and end | |
302 | address when it is allocated, and removed from the tree when it | |
303 | is freed. | |
304 | ||
305 | A red-black tree is a balanced binary tree with the following | |
306 | properties: | |
307 | ||
308 | 1. Every node is either red or black. | |
309 | 2. Every leaf is black. | |
310 | 3. If a node is red, then both of its children are black. | |
311 | 4. Every simple path from a node to a descendant leaf contains | |
312 | the same number of black nodes. | |
313 | 5. The root is always black. | |
314 | ||
315 | When nodes are inserted into the tree, or deleted from the tree, | |
316 | the tree is "fixed" so that these properties are always true. | |
317 | ||
318 | A red-black tree with N internal nodes has height at most 2 | |
319 | log(N+1). Searches, insertions and deletions are done in O(log N). | |
320 | Please see a text book about data structures for a detailed | |
321 | description of red-black trees. Any book worth its salt should | |
322 | describe them. */ | |
323 | ||
324 | struct mem_node | |
325 | { | |
326 | struct mem_node *left, *right, *parent; | |
327 | ||
328 | /* Start and end of allocated region. */ | |
329 | void *start, *end; | |
330 | ||
331 | /* Node color. */ | |
332 | enum {MEM_BLACK, MEM_RED} color; | |
333 | ||
334 | /* Memory type. */ | |
335 | enum mem_type type; | |
336 | }; | |
337 | ||
338 | /* Base address of stack. Set in main. */ | |
339 | ||
340 | Lisp_Object *stack_base; | |
341 | ||
342 | /* Root of the tree describing allocated Lisp memory. */ | |
343 | ||
344 | static struct mem_node *mem_root; | |
345 | ||
346 | /* Sentinel node of the tree. */ | |
347 | ||
348 | static struct mem_node mem_z; | |
349 | #define MEM_NIL &mem_z | |
350 | ||
b3303f74 | 351 | static POINTER_TYPE *lisp_malloc P_ ((size_t, enum mem_type)); |
bf952fb6 | 352 | static void lisp_free P_ ((POINTER_TYPE *)); |
34400008 GM |
353 | static void mark_stack P_ ((void)); |
354 | static void init_stack P_ ((Lisp_Object *)); | |
355 | static int live_vector_p P_ ((struct mem_node *, void *)); | |
356 | static int live_buffer_p P_ ((struct mem_node *, void *)); | |
357 | static int live_string_p P_ ((struct mem_node *, void *)); | |
358 | static int live_cons_p P_ ((struct mem_node *, void *)); | |
359 | static int live_symbol_p P_ ((struct mem_node *, void *)); | |
360 | static int live_float_p P_ ((struct mem_node *, void *)); | |
361 | static int live_misc_p P_ ((struct mem_node *, void *)); | |
182ff242 | 362 | static void mark_maybe_object P_ ((Lisp_Object)); |
34400008 GM |
363 | static void mark_memory P_ ((void *, void *)); |
364 | static void mem_init P_ ((void)); | |
365 | static struct mem_node *mem_insert P_ ((void *, void *, enum mem_type)); | |
366 | static void mem_insert_fixup P_ ((struct mem_node *)); | |
367 | static void mem_rotate_left P_ ((struct mem_node *)); | |
368 | static void mem_rotate_right P_ ((struct mem_node *)); | |
369 | static void mem_delete P_ ((struct mem_node *)); | |
370 | static void mem_delete_fixup P_ ((struct mem_node *)); | |
371 | static INLINE struct mem_node *mem_find P_ ((void *)); | |
372 | ||
373 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
374 | static void check_gcpros P_ ((void)); | |
375 | #endif | |
376 | ||
877935b1 | 377 | #endif /* GC_MARK_STACK || GC_MALLOC_CHECK */ |
34400008 | 378 | |
1f0b3fd2 GM |
379 | /* Recording what needs to be marked for gc. */ |
380 | ||
381 | struct gcpro *gcprolist; | |
382 | ||
383 | /* Addresses of staticpro'd variables. */ | |
384 | ||
385 | #define NSTATICS 1024 | |
386 | Lisp_Object *staticvec[NSTATICS] = {0}; | |
387 | ||
388 | /* Index of next unused slot in staticvec. */ | |
389 | ||
390 | int staticidx = 0; | |
391 | ||
392 | static POINTER_TYPE *pure_alloc P_ ((size_t, int)); | |
393 | ||
394 | ||
395 | /* Value is SZ rounded up to the next multiple of ALIGNMENT. | |
396 | ALIGNMENT must be a power of 2. */ | |
397 | ||
398 | #define ALIGN(SZ, ALIGNMENT) \ | |
399 | (((SZ) + (ALIGNMENT) - 1) & ~((ALIGNMENT) - 1)) | |
400 | ||
7146af97 | 401 | \f |
34400008 GM |
402 | /************************************************************************ |
403 | Malloc | |
404 | ************************************************************************/ | |
405 | ||
406 | /* Write STR to Vstandard_output plus some advice on how to free some | |
407 | memory. Called when memory gets low. */ | |
1a4f1e2c | 408 | |
7146af97 JB |
409 | Lisp_Object |
410 | malloc_warning_1 (str) | |
411 | Lisp_Object str; | |
412 | { | |
413 | Fprinc (str, Vstandard_output); | |
414 | write_string ("\nKilling some buffers may delay running out of memory.\n", -1); | |
415 | write_string ("However, certainly by the time you receive the 95% warning,\n", -1); | |
416 | write_string ("you should clean up, kill this Emacs, and start a new one.", -1); | |
417 | return Qnil; | |
418 | } | |
419 | ||
34400008 GM |
420 | |
421 | /* Function malloc calls this if it finds we are near exhausting | |
422 | storage. */ | |
d457598b AS |
423 | |
424 | void | |
7146af97 JB |
425 | malloc_warning (str) |
426 | char *str; | |
427 | { | |
428 | pending_malloc_warning = str; | |
429 | } | |
430 | ||
34400008 GM |
431 | |
432 | /* Display a malloc warning in buffer *Danger*. */ | |
433 | ||
d457598b | 434 | void |
7146af97 JB |
435 | display_malloc_warning () |
436 | { | |
437 | register Lisp_Object val; | |
438 | ||
439 | val = build_string (pending_malloc_warning); | |
440 | pending_malloc_warning = 0; | |
441 | internal_with_output_to_temp_buffer (" *Danger*", malloc_warning_1, val); | |
442 | } | |
443 | ||
34400008 | 444 | |
d1658221 | 445 | #ifdef DOUG_LEA_MALLOC |
1177ecf6 | 446 | # define BYTES_USED (mallinfo ().arena) |
d1658221 | 447 | #else |
1177ecf6 | 448 | # define BYTES_USED _bytes_used |
d1658221 RS |
449 | #endif |
450 | ||
34400008 | 451 | |
2e471eb5 | 452 | /* Called if malloc returns zero. */ |
276cbe5a | 453 | |
d457598b | 454 | void |
7146af97 JB |
455 | memory_full () |
456 | { | |
276cbe5a | 457 | #ifndef SYSTEM_MALLOC |
d1658221 | 458 | bytes_used_when_full = BYTES_USED; |
276cbe5a RS |
459 | #endif |
460 | ||
461 | /* The first time we get here, free the spare memory. */ | |
462 | if (spare_memory) | |
463 | { | |
464 | free (spare_memory); | |
465 | spare_memory = 0; | |
466 | } | |
467 | ||
2e471eb5 GM |
468 | /* This used to call error, but if we've run out of memory, we could |
469 | get infinite recursion trying to build the string. */ | |
276cbe5a | 470 | while (1) |
74d84334 | 471 | Fsignal (Qnil, memory_signal_data); |
276cbe5a RS |
472 | } |
473 | ||
34400008 | 474 | |
276cbe5a RS |
475 | /* Called if we can't allocate relocatable space for a buffer. */ |
476 | ||
477 | void | |
478 | buffer_memory_full () | |
479 | { | |
2e471eb5 GM |
480 | /* If buffers use the relocating allocator, no need to free |
481 | spare_memory, because we may have plenty of malloc space left | |
482 | that we could get, and if we don't, the malloc that fails will | |
483 | itself cause spare_memory to be freed. If buffers don't use the | |
484 | relocating allocator, treat this like any other failing | |
485 | malloc. */ | |
276cbe5a RS |
486 | |
487 | #ifndef REL_ALLOC | |
488 | memory_full (); | |
489 | #endif | |
490 | ||
2e471eb5 GM |
491 | /* This used to call error, but if we've run out of memory, we could |
492 | get infinite recursion trying to build the string. */ | |
bcb61d60 KH |
493 | while (1) |
494 | Fsignal (Qerror, memory_signal_data); | |
7146af97 JB |
495 | } |
496 | ||
34400008 GM |
497 | |
498 | /* Like malloc but check for no memory and block interrupt input.. */ | |
7146af97 | 499 | |
c971ff9a | 500 | POINTER_TYPE * |
7146af97 | 501 | xmalloc (size) |
675d5130 | 502 | size_t size; |
7146af97 | 503 | { |
c971ff9a | 504 | register POINTER_TYPE *val; |
7146af97 | 505 | |
9ac0d9e0 | 506 | BLOCK_INPUT; |
c971ff9a | 507 | val = (POINTER_TYPE *) malloc (size); |
9ac0d9e0 | 508 | UNBLOCK_INPUT; |
7146af97 | 509 | |
2e471eb5 GM |
510 | if (!val && size) |
511 | memory_full (); | |
7146af97 JB |
512 | return val; |
513 | } | |
514 | ||
34400008 GM |
515 | |
516 | /* Like realloc but check for no memory and block interrupt input.. */ | |
517 | ||
c971ff9a | 518 | POINTER_TYPE * |
7146af97 | 519 | xrealloc (block, size) |
c971ff9a | 520 | POINTER_TYPE *block; |
675d5130 | 521 | size_t size; |
7146af97 | 522 | { |
c971ff9a | 523 | register POINTER_TYPE *val; |
7146af97 | 524 | |
9ac0d9e0 | 525 | BLOCK_INPUT; |
56d2031b JB |
526 | /* We must call malloc explicitly when BLOCK is 0, since some |
527 | reallocs don't do this. */ | |
528 | if (! block) | |
c971ff9a | 529 | val = (POINTER_TYPE *) malloc (size); |
f048679d | 530 | else |
c971ff9a | 531 | val = (POINTER_TYPE *) realloc (block, size); |
9ac0d9e0 | 532 | UNBLOCK_INPUT; |
7146af97 JB |
533 | |
534 | if (!val && size) memory_full (); | |
535 | return val; | |
536 | } | |
9ac0d9e0 | 537 | |
34400008 GM |
538 | |
539 | /* Like free but block interrupt input.. */ | |
540 | ||
9ac0d9e0 JB |
541 | void |
542 | xfree (block) | |
c971ff9a | 543 | POINTER_TYPE *block; |
9ac0d9e0 JB |
544 | { |
545 | BLOCK_INPUT; | |
546 | free (block); | |
547 | UNBLOCK_INPUT; | |
548 | } | |
549 | ||
c8099634 | 550 | |
dca7c6a8 GM |
551 | /* Like strdup, but uses xmalloc. */ |
552 | ||
553 | char * | |
554 | xstrdup (s) | |
555 | char *s; | |
556 | { | |
675d5130 | 557 | size_t len = strlen (s) + 1; |
dca7c6a8 GM |
558 | char *p = (char *) xmalloc (len); |
559 | bcopy (s, p, len); | |
560 | return p; | |
561 | } | |
562 | ||
563 | ||
34400008 GM |
564 | /* Like malloc but used for allocating Lisp data. NBYTES is the |
565 | number of bytes to allocate, TYPE describes the intended use of the | |
566 | allcated memory block (for strings, for conses, ...). */ | |
567 | ||
675d5130 | 568 | static POINTER_TYPE * |
34400008 | 569 | lisp_malloc (nbytes, type) |
675d5130 | 570 | size_t nbytes; |
34400008 | 571 | enum mem_type type; |
c8099634 | 572 | { |
34400008 | 573 | register void *val; |
c8099634 RS |
574 | |
575 | BLOCK_INPUT; | |
877935b1 GM |
576 | |
577 | #ifdef GC_MALLOC_CHECK | |
578 | allocated_mem_type = type; | |
579 | #endif | |
580 | ||
34400008 | 581 | val = (void *) malloc (nbytes); |
c8099634 | 582 | |
877935b1 | 583 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
dca7c6a8 | 584 | if (val && type != MEM_TYPE_NON_LISP) |
34400008 GM |
585 | mem_insert (val, (char *) val + nbytes, type); |
586 | #endif | |
877935b1 | 587 | |
dca7c6a8 GM |
588 | UNBLOCK_INPUT; |
589 | if (!val && nbytes) | |
590 | memory_full (); | |
c8099634 RS |
591 | return val; |
592 | } | |
593 | ||
34400008 GM |
594 | |
595 | /* Return a new buffer structure allocated from the heap with | |
596 | a call to lisp_malloc. */ | |
597 | ||
598 | struct buffer * | |
599 | allocate_buffer () | |
600 | { | |
601 | return (struct buffer *) lisp_malloc (sizeof (struct buffer), | |
602 | MEM_TYPE_BUFFER); | |
603 | } | |
604 | ||
605 | ||
606 | /* Free BLOCK. This must be called to free memory allocated with a | |
607 | call to lisp_malloc. */ | |
608 | ||
bf952fb6 | 609 | static void |
c8099634 | 610 | lisp_free (block) |
675d5130 | 611 | POINTER_TYPE *block; |
c8099634 RS |
612 | { |
613 | BLOCK_INPUT; | |
c8099634 | 614 | free (block); |
877935b1 | 615 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
34400008 GM |
616 | mem_delete (mem_find (block)); |
617 | #endif | |
c8099634 RS |
618 | UNBLOCK_INPUT; |
619 | } | |
34400008 | 620 | |
9ac0d9e0 JB |
621 | \f |
622 | /* Arranging to disable input signals while we're in malloc. | |
623 | ||
624 | This only works with GNU malloc. To help out systems which can't | |
625 | use GNU malloc, all the calls to malloc, realloc, and free | |
626 | elsewhere in the code should be inside a BLOCK_INPUT/UNBLOCK_INPUT | |
627 | pairs; unfortunately, we have no idea what C library functions | |
628 | might call malloc, so we can't really protect them unless you're | |
629 | using GNU malloc. Fortunately, most of the major operating can use | |
630 | GNU malloc. */ | |
631 | ||
632 | #ifndef SYSTEM_MALLOC | |
b3303f74 DL |
633 | #ifndef DOUG_LEA_MALLOC |
634 | extern void * (*__malloc_hook) P_ ((size_t)); | |
635 | extern void * (*__realloc_hook) P_ ((void *, size_t)); | |
636 | extern void (*__free_hook) P_ ((void *)); | |
637 | /* Else declared in malloc.h, perhaps with an extra arg. */ | |
638 | #endif /* DOUG_LEA_MALLOC */ | |
b0846f52 | 639 | static void * (*old_malloc_hook) (); |
b0846f52 | 640 | static void * (*old_realloc_hook) (); |
b0846f52 | 641 | static void (*old_free_hook) (); |
9ac0d9e0 | 642 | |
276cbe5a RS |
643 | /* This function is used as the hook for free to call. */ |
644 | ||
9ac0d9e0 JB |
645 | static void |
646 | emacs_blocked_free (ptr) | |
647 | void *ptr; | |
648 | { | |
649 | BLOCK_INPUT; | |
877935b1 GM |
650 | |
651 | #ifdef GC_MALLOC_CHECK | |
a83fee2c GM |
652 | if (ptr) |
653 | { | |
654 | struct mem_node *m; | |
877935b1 | 655 | |
a83fee2c GM |
656 | m = mem_find (ptr); |
657 | if (m == MEM_NIL || m->start != ptr) | |
658 | { | |
659 | fprintf (stderr, | |
660 | "Freeing `%p' which wasn't allocated with malloc\n", ptr); | |
661 | abort (); | |
662 | } | |
663 | else | |
664 | { | |
665 | /* fprintf (stderr, "free %p...%p (%p)\n", m->start, m->end, ptr); */ | |
666 | mem_delete (m); | |
667 | } | |
668 | } | |
877935b1 GM |
669 | #endif /* GC_MALLOC_CHECK */ |
670 | ||
9ac0d9e0 JB |
671 | __free_hook = old_free_hook; |
672 | free (ptr); | |
877935b1 | 673 | |
276cbe5a RS |
674 | /* If we released our reserve (due to running out of memory), |
675 | and we have a fair amount free once again, | |
676 | try to set aside another reserve in case we run out once more. */ | |
677 | if (spare_memory == 0 | |
678 | /* Verify there is enough space that even with the malloc | |
679 | hysteresis this call won't run out again. | |
680 | The code here is correct as long as SPARE_MEMORY | |
681 | is substantially larger than the block size malloc uses. */ | |
682 | && (bytes_used_when_full | |
d1658221 | 683 | > BYTES_USED + max (malloc_hysteresis, 4) * SPARE_MEMORY)) |
675d5130 | 684 | spare_memory = (char *) malloc ((size_t) SPARE_MEMORY); |
276cbe5a | 685 | |
b0846f52 | 686 | __free_hook = emacs_blocked_free; |
9ac0d9e0 JB |
687 | UNBLOCK_INPUT; |
688 | } | |
689 | ||
34400008 | 690 | |
276cbe5a RS |
691 | /* If we released our reserve (due to running out of memory), |
692 | and we have a fair amount free once again, | |
693 | try to set aside another reserve in case we run out once more. | |
694 | ||
695 | This is called when a relocatable block is freed in ralloc.c. */ | |
696 | ||
697 | void | |
698 | refill_memory_reserve () | |
699 | { | |
700 | if (spare_memory == 0) | |
675d5130 | 701 | spare_memory = (char *) malloc ((size_t) SPARE_MEMORY); |
276cbe5a RS |
702 | } |
703 | ||
34400008 | 704 | |
276cbe5a RS |
705 | /* This function is the malloc hook that Emacs uses. */ |
706 | ||
9ac0d9e0 JB |
707 | static void * |
708 | emacs_blocked_malloc (size) | |
675d5130 | 709 | size_t size; |
9ac0d9e0 JB |
710 | { |
711 | void *value; | |
712 | ||
713 | BLOCK_INPUT; | |
714 | __malloc_hook = old_malloc_hook; | |
1177ecf6 | 715 | #ifdef DOUG_LEA_MALLOC |
d1658221 | 716 | mallopt (M_TOP_PAD, malloc_hysteresis * 4096); |
1177ecf6 | 717 | #else |
d1658221 | 718 | __malloc_extra_blocks = malloc_hysteresis; |
1177ecf6 | 719 | #endif |
877935b1 | 720 | |
2756d8ee | 721 | value = (void *) malloc (size); |
877935b1 GM |
722 | |
723 | #ifdef GC_MALLOC_CHECK | |
724 | { | |
725 | struct mem_node *m = mem_find (value); | |
726 | if (m != MEM_NIL) | |
727 | { | |
728 | fprintf (stderr, "Malloc returned %p which is already in use\n", | |
729 | value); | |
730 | fprintf (stderr, "Region in use is %p...%p, %u bytes, type %d\n", | |
731 | m->start, m->end, (char *) m->end - (char *) m->start, | |
732 | m->type); | |
733 | abort (); | |
734 | } | |
735 | ||
736 | if (!dont_register_blocks) | |
737 | { | |
738 | mem_insert (value, (char *) value + max (1, size), allocated_mem_type); | |
739 | allocated_mem_type = MEM_TYPE_NON_LISP; | |
740 | } | |
741 | } | |
742 | #endif /* GC_MALLOC_CHECK */ | |
743 | ||
b0846f52 | 744 | __malloc_hook = emacs_blocked_malloc; |
9ac0d9e0 JB |
745 | UNBLOCK_INPUT; |
746 | ||
877935b1 | 747 | /* fprintf (stderr, "%p malloc\n", value); */ |
9ac0d9e0 JB |
748 | return value; |
749 | } | |
750 | ||
34400008 GM |
751 | |
752 | /* This function is the realloc hook that Emacs uses. */ | |
753 | ||
9ac0d9e0 JB |
754 | static void * |
755 | emacs_blocked_realloc (ptr, size) | |
756 | void *ptr; | |
675d5130 | 757 | size_t size; |
9ac0d9e0 JB |
758 | { |
759 | void *value; | |
760 | ||
761 | BLOCK_INPUT; | |
762 | __realloc_hook = old_realloc_hook; | |
877935b1 GM |
763 | |
764 | #ifdef GC_MALLOC_CHECK | |
765 | if (ptr) | |
766 | { | |
767 | struct mem_node *m = mem_find (ptr); | |
768 | if (m == MEM_NIL || m->start != ptr) | |
769 | { | |
770 | fprintf (stderr, | |
771 | "Realloc of %p which wasn't allocated with malloc\n", | |
772 | ptr); | |
773 | abort (); | |
774 | } | |
775 | ||
776 | mem_delete (m); | |
777 | } | |
778 | ||
779 | /* fprintf (stderr, "%p -> realloc\n", ptr); */ | |
780 | ||
781 | /* Prevent malloc from registering blocks. */ | |
782 | dont_register_blocks = 1; | |
783 | #endif /* GC_MALLOC_CHECK */ | |
784 | ||
2756d8ee | 785 | value = (void *) realloc (ptr, size); |
877935b1 GM |
786 | |
787 | #ifdef GC_MALLOC_CHECK | |
788 | dont_register_blocks = 0; | |
789 | ||
790 | { | |
791 | struct mem_node *m = mem_find (value); | |
792 | if (m != MEM_NIL) | |
793 | { | |
794 | fprintf (stderr, "Realloc returns memory that is already in use\n"); | |
795 | abort (); | |
796 | } | |
797 | ||
798 | /* Can't handle zero size regions in the red-black tree. */ | |
799 | mem_insert (value, (char *) value + max (size, 1), MEM_TYPE_NON_LISP); | |
800 | } | |
801 | ||
802 | /* fprintf (stderr, "%p <- realloc\n", value); */ | |
803 | #endif /* GC_MALLOC_CHECK */ | |
804 | ||
b0846f52 | 805 | __realloc_hook = emacs_blocked_realloc; |
9ac0d9e0 JB |
806 | UNBLOCK_INPUT; |
807 | ||
808 | return value; | |
809 | } | |
810 | ||
34400008 GM |
811 | |
812 | /* Called from main to set up malloc to use our hooks. */ | |
813 | ||
9ac0d9e0 JB |
814 | void |
815 | uninterrupt_malloc () | |
816 | { | |
c8099634 RS |
817 | if (__free_hook != emacs_blocked_free) |
818 | old_free_hook = __free_hook; | |
b0846f52 | 819 | __free_hook = emacs_blocked_free; |
9ac0d9e0 | 820 | |
c8099634 RS |
821 | if (__malloc_hook != emacs_blocked_malloc) |
822 | old_malloc_hook = __malloc_hook; | |
b0846f52 | 823 | __malloc_hook = emacs_blocked_malloc; |
9ac0d9e0 | 824 | |
c8099634 RS |
825 | if (__realloc_hook != emacs_blocked_realloc) |
826 | old_realloc_hook = __realloc_hook; | |
b0846f52 | 827 | __realloc_hook = emacs_blocked_realloc; |
9ac0d9e0 | 828 | } |
2e471eb5 GM |
829 | |
830 | #endif /* not SYSTEM_MALLOC */ | |
831 | ||
832 | ||
7146af97 | 833 | \f |
2e471eb5 GM |
834 | /*********************************************************************** |
835 | Interval Allocation | |
836 | ***********************************************************************/ | |
1a4f1e2c | 837 | |
34400008 GM |
838 | /* Number of intervals allocated in an interval_block structure. |
839 | The 1020 is 1024 minus malloc overhead. */ | |
840 | ||
d5e35230 JA |
841 | #define INTERVAL_BLOCK_SIZE \ |
842 | ((1020 - sizeof (struct interval_block *)) / sizeof (struct interval)) | |
843 | ||
34400008 GM |
844 | /* Intervals are allocated in chunks in form of an interval_block |
845 | structure. */ | |
846 | ||
d5e35230 | 847 | struct interval_block |
2e471eb5 GM |
848 | { |
849 | struct interval_block *next; | |
850 | struct interval intervals[INTERVAL_BLOCK_SIZE]; | |
851 | }; | |
d5e35230 | 852 | |
34400008 GM |
853 | /* Current interval block. Its `next' pointer points to older |
854 | blocks. */ | |
855 | ||
d5e35230 | 856 | struct interval_block *interval_block; |
34400008 GM |
857 | |
858 | /* Index in interval_block above of the next unused interval | |
859 | structure. */ | |
860 | ||
d5e35230 | 861 | static int interval_block_index; |
34400008 GM |
862 | |
863 | /* Number of free and live intervals. */ | |
864 | ||
2e471eb5 | 865 | static int total_free_intervals, total_intervals; |
d5e35230 | 866 | |
34400008 GM |
867 | /* List of free intervals. */ |
868 | ||
d5e35230 JA |
869 | INTERVAL interval_free_list; |
870 | ||
c8099634 | 871 | /* Total number of interval blocks now in use. */ |
2e471eb5 | 872 | |
c8099634 RS |
873 | int n_interval_blocks; |
874 | ||
34400008 GM |
875 | |
876 | /* Initialize interval allocation. */ | |
877 | ||
d5e35230 JA |
878 | static void |
879 | init_intervals () | |
880 | { | |
881 | interval_block | |
34400008 GM |
882 | = (struct interval_block *) lisp_malloc (sizeof *interval_block, |
883 | MEM_TYPE_NON_LISP); | |
d5e35230 | 884 | interval_block->next = 0; |
290c8f1e | 885 | bzero ((char *) interval_block->intervals, sizeof interval_block->intervals); |
d5e35230 JA |
886 | interval_block_index = 0; |
887 | interval_free_list = 0; | |
c8099634 | 888 | n_interval_blocks = 1; |
d5e35230 JA |
889 | } |
890 | ||
34400008 GM |
891 | |
892 | /* Return a new interval. */ | |
d5e35230 JA |
893 | |
894 | INTERVAL | |
895 | make_interval () | |
896 | { | |
897 | INTERVAL val; | |
898 | ||
899 | if (interval_free_list) | |
900 | { | |
901 | val = interval_free_list; | |
439d5cb4 | 902 | interval_free_list = INTERVAL_PARENT (interval_free_list); |
d5e35230 JA |
903 | } |
904 | else | |
905 | { | |
906 | if (interval_block_index == INTERVAL_BLOCK_SIZE) | |
907 | { | |
3c06d205 KH |
908 | register struct interval_block *newi; |
909 | ||
34400008 GM |
910 | newi = (struct interval_block *) lisp_malloc (sizeof *newi, |
911 | MEM_TYPE_NON_LISP); | |
d5e35230 JA |
912 | |
913 | VALIDATE_LISP_STORAGE (newi, sizeof *newi); | |
914 | newi->next = interval_block; | |
915 | interval_block = newi; | |
916 | interval_block_index = 0; | |
c8099634 | 917 | n_interval_blocks++; |
d5e35230 JA |
918 | } |
919 | val = &interval_block->intervals[interval_block_index++]; | |
920 | } | |
921 | consing_since_gc += sizeof (struct interval); | |
310ea200 | 922 | intervals_consed++; |
d5e35230 JA |
923 | RESET_INTERVAL (val); |
924 | return val; | |
925 | } | |
926 | ||
34400008 GM |
927 | |
928 | /* Mark Lisp objects in interval I. */ | |
d5e35230 JA |
929 | |
930 | static void | |
d393c068 | 931 | mark_interval (i, dummy) |
d5e35230 | 932 | register INTERVAL i; |
d393c068 | 933 | Lisp_Object dummy; |
d5e35230 JA |
934 | { |
935 | if (XMARKBIT (i->plist)) | |
936 | abort (); | |
937 | mark_object (&i->plist); | |
938 | XMARK (i->plist); | |
939 | } | |
940 | ||
34400008 GM |
941 | |
942 | /* Mark the interval tree rooted in TREE. Don't call this directly; | |
943 | use the macro MARK_INTERVAL_TREE instead. */ | |
944 | ||
d5e35230 JA |
945 | static void |
946 | mark_interval_tree (tree) | |
947 | register INTERVAL tree; | |
948 | { | |
e8720644 JB |
949 | /* No need to test if this tree has been marked already; this |
950 | function is always called through the MARK_INTERVAL_TREE macro, | |
951 | which takes care of that. */ | |
952 | ||
953 | /* XMARK expands to an assignment; the LHS of an assignment can't be | |
954 | a cast. */ | |
e0b8c689 | 955 | XMARK (tree->up.obj); |
d5e35230 | 956 | |
d393c068 | 957 | traverse_intervals (tree, 1, 0, mark_interval, Qnil); |
d5e35230 JA |
958 | } |
959 | ||
34400008 GM |
960 | |
961 | /* Mark the interval tree rooted in I. */ | |
962 | ||
e8720644 JB |
963 | #define MARK_INTERVAL_TREE(i) \ |
964 | do { \ | |
965 | if (!NULL_INTERVAL_P (i) \ | |
e0b8c689 | 966 | && ! XMARKBIT (i->up.obj)) \ |
e8720644 JB |
967 | mark_interval_tree (i); \ |
968 | } while (0) | |
d5e35230 | 969 | |
34400008 | 970 | |
1a4f1e2c | 971 | /* The oddity in the call to XUNMARK is necessary because XUNMARK |
2e471eb5 GM |
972 | expands to an assignment to its argument, and most C compilers |
973 | don't support casts on the left operand of `='. */ | |
974 | ||
975 | #define UNMARK_BALANCE_INTERVALS(i) \ | |
976 | do { \ | |
977 | if (! NULL_INTERVAL_P (i)) \ | |
978 | { \ | |
e0b8c689 | 979 | XUNMARK ((i)->up.obj); \ |
2e471eb5 GM |
980 | (i) = balance_intervals (i); \ |
981 | } \ | |
982 | } while (0) | |
d5e35230 | 983 | |
cc2d8c6b KR |
984 | \f |
985 | /* Number support. If NO_UNION_TYPE isn't in effect, we | |
986 | can't create number objects in macros. */ | |
987 | #ifndef make_number | |
988 | Lisp_Object | |
989 | make_number (n) | |
990 | int n; | |
991 | { | |
992 | Lisp_Object obj; | |
993 | obj.s.val = n; | |
994 | obj.s.type = Lisp_Int; | |
995 | return obj; | |
996 | } | |
997 | #endif | |
d5e35230 | 998 | \f |
2e471eb5 GM |
999 | /*********************************************************************** |
1000 | String Allocation | |
1001 | ***********************************************************************/ | |
1a4f1e2c | 1002 | |
2e471eb5 GM |
1003 | /* Lisp_Strings are allocated in string_block structures. When a new |
1004 | string_block is allocated, all the Lisp_Strings it contains are | |
1005 | added to a free-list stiing_free_list. When a new Lisp_String is | |
1006 | needed, it is taken from that list. During the sweep phase of GC, | |
1007 | string_blocks that are entirely free are freed, except two which | |
1008 | we keep. | |
7146af97 | 1009 | |
2e471eb5 GM |
1010 | String data is allocated from sblock structures. Strings larger |
1011 | than LARGE_STRING_BYTES, get their own sblock, data for smaller | |
1012 | strings is sub-allocated out of sblocks of size SBLOCK_SIZE. | |
7146af97 | 1013 | |
2e471eb5 GM |
1014 | Sblocks consist internally of sdata structures, one for each |
1015 | Lisp_String. The sdata structure points to the Lisp_String it | |
1016 | belongs to. The Lisp_String points back to the `u.data' member of | |
1017 | its sdata structure. | |
7146af97 | 1018 | |
2e471eb5 GM |
1019 | When a Lisp_String is freed during GC, it is put back on |
1020 | string_free_list, and its `data' member and its sdata's `string' | |
1021 | pointer is set to null. The size of the string is recorded in the | |
1022 | `u.nbytes' member of the sdata. So, sdata structures that are no | |
1023 | longer used, can be easily recognized, and it's easy to compact the | |
1024 | sblocks of small strings which we do in compact_small_strings. */ | |
7146af97 | 1025 | |
2e471eb5 GM |
1026 | /* Size in bytes of an sblock structure used for small strings. This |
1027 | is 8192 minus malloc overhead. */ | |
7146af97 | 1028 | |
2e471eb5 | 1029 | #define SBLOCK_SIZE 8188 |
c8099634 | 1030 | |
2e471eb5 GM |
1031 | /* Strings larger than this are considered large strings. String data |
1032 | for large strings is allocated from individual sblocks. */ | |
7146af97 | 1033 | |
2e471eb5 GM |
1034 | #define LARGE_STRING_BYTES 1024 |
1035 | ||
1036 | /* Structure describing string memory sub-allocated from an sblock. | |
1037 | This is where the contents of Lisp strings are stored. */ | |
1038 | ||
1039 | struct sdata | |
7146af97 | 1040 | { |
2e471eb5 GM |
1041 | /* Back-pointer to the string this sdata belongs to. If null, this |
1042 | structure is free, and the NBYTES member of the union below | |
34400008 | 1043 | contains the string's byte size (the same value that STRING_BYTES |
2e471eb5 GM |
1044 | would return if STRING were non-null). If non-null, STRING_BYTES |
1045 | (STRING) is the size of the data, and DATA contains the string's | |
1046 | contents. */ | |
1047 | struct Lisp_String *string; | |
7146af97 | 1048 | |
31d929e5 GM |
1049 | #ifdef GC_CHECK_STRING_BYTES |
1050 | ||
1051 | EMACS_INT nbytes; | |
1052 | unsigned char data[1]; | |
1053 | ||
1054 | #define SDATA_NBYTES(S) (S)->nbytes | |
1055 | #define SDATA_DATA(S) (S)->data | |
1056 | ||
1057 | #else /* not GC_CHECK_STRING_BYTES */ | |
1058 | ||
2e471eb5 GM |
1059 | union |
1060 | { | |
1061 | /* When STRING in non-null. */ | |
1062 | unsigned char data[1]; | |
1063 | ||
1064 | /* When STRING is null. */ | |
1065 | EMACS_INT nbytes; | |
1066 | } u; | |
31d929e5 GM |
1067 | |
1068 | ||
1069 | #define SDATA_NBYTES(S) (S)->u.nbytes | |
1070 | #define SDATA_DATA(S) (S)->u.data | |
1071 | ||
1072 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 GM |
1073 | }; |
1074 | ||
31d929e5 | 1075 | |
2e471eb5 GM |
1076 | /* Structure describing a block of memory which is sub-allocated to |
1077 | obtain string data memory for strings. Blocks for small strings | |
1078 | are of fixed size SBLOCK_SIZE. Blocks for large strings are made | |
1079 | as large as needed. */ | |
1080 | ||
1081 | struct sblock | |
7146af97 | 1082 | { |
2e471eb5 GM |
1083 | /* Next in list. */ |
1084 | struct sblock *next; | |
7146af97 | 1085 | |
2e471eb5 GM |
1086 | /* Pointer to the next free sdata block. This points past the end |
1087 | of the sblock if there isn't any space left in this block. */ | |
1088 | struct sdata *next_free; | |
1089 | ||
1090 | /* Start of data. */ | |
1091 | struct sdata first_data; | |
1092 | }; | |
1093 | ||
1094 | /* Number of Lisp strings in a string_block structure. The 1020 is | |
1095 | 1024 minus malloc overhead. */ | |
1096 | ||
1097 | #define STRINGS_IN_STRING_BLOCK \ | |
1098 | ((1020 - sizeof (struct string_block *)) / sizeof (struct Lisp_String)) | |
1099 | ||
1100 | /* Structure describing a block from which Lisp_String structures | |
1101 | are allocated. */ | |
1102 | ||
1103 | struct string_block | |
7146af97 | 1104 | { |
2e471eb5 GM |
1105 | struct string_block *next; |
1106 | struct Lisp_String strings[STRINGS_IN_STRING_BLOCK]; | |
1107 | }; | |
7146af97 | 1108 | |
2e471eb5 GM |
1109 | /* Head and tail of the list of sblock structures holding Lisp string |
1110 | data. We always allocate from current_sblock. The NEXT pointers | |
1111 | in the sblock structures go from oldest_sblock to current_sblock. */ | |
3c06d205 | 1112 | |
2e471eb5 | 1113 | static struct sblock *oldest_sblock, *current_sblock; |
7146af97 | 1114 | |
2e471eb5 | 1115 | /* List of sblocks for large strings. */ |
7146af97 | 1116 | |
2e471eb5 | 1117 | static struct sblock *large_sblocks; |
7146af97 | 1118 | |
2e471eb5 | 1119 | /* List of string_block structures, and how many there are. */ |
7146af97 | 1120 | |
2e471eb5 GM |
1121 | static struct string_block *string_blocks; |
1122 | static int n_string_blocks; | |
7146af97 | 1123 | |
2e471eb5 | 1124 | /* Free-list of Lisp_Strings. */ |
7146af97 | 1125 | |
2e471eb5 | 1126 | static struct Lisp_String *string_free_list; |
7146af97 | 1127 | |
2e471eb5 | 1128 | /* Number of live and free Lisp_Strings. */ |
c8099634 | 1129 | |
2e471eb5 | 1130 | static int total_strings, total_free_strings; |
7146af97 | 1131 | |
2e471eb5 GM |
1132 | /* Number of bytes used by live strings. */ |
1133 | ||
1134 | static int total_string_size; | |
1135 | ||
1136 | /* Given a pointer to a Lisp_String S which is on the free-list | |
1137 | string_free_list, return a pointer to its successor in the | |
1138 | free-list. */ | |
1139 | ||
1140 | #define NEXT_FREE_LISP_STRING(S) (*(struct Lisp_String **) (S)) | |
1141 | ||
1142 | /* Return a pointer to the sdata structure belonging to Lisp string S. | |
1143 | S must be live, i.e. S->data must not be null. S->data is actually | |
1144 | a pointer to the `u.data' member of its sdata structure; the | |
1145 | structure starts at a constant offset in front of that. */ | |
1146 | ||
31d929e5 GM |
1147 | #ifdef GC_CHECK_STRING_BYTES |
1148 | ||
1149 | #define SDATA_OF_STRING(S) \ | |
1150 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *) \ | |
1151 | - sizeof (EMACS_INT))) | |
1152 | ||
1153 | #else /* not GC_CHECK_STRING_BYTES */ | |
1154 | ||
2e471eb5 GM |
1155 | #define SDATA_OF_STRING(S) \ |
1156 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *))) | |
1157 | ||
31d929e5 GM |
1158 | #endif /* not GC_CHECK_STRING_BYTES */ |
1159 | ||
2e471eb5 GM |
1160 | /* Value is the size of an sdata structure large enough to hold NBYTES |
1161 | bytes of string data. The value returned includes a terminating | |
1162 | NUL byte, the size of the sdata structure, and padding. */ | |
1163 | ||
31d929e5 GM |
1164 | #ifdef GC_CHECK_STRING_BYTES |
1165 | ||
2e471eb5 GM |
1166 | #define SDATA_SIZE(NBYTES) \ |
1167 | ((sizeof (struct Lisp_String *) \ | |
1168 | + (NBYTES) + 1 \ | |
31d929e5 | 1169 | + sizeof (EMACS_INT) \ |
2e471eb5 GM |
1170 | + sizeof (EMACS_INT) - 1) \ |
1171 | & ~(sizeof (EMACS_INT) - 1)) | |
1172 | ||
31d929e5 GM |
1173 | #else /* not GC_CHECK_STRING_BYTES */ |
1174 | ||
1175 | #define SDATA_SIZE(NBYTES) \ | |
1176 | ((sizeof (struct Lisp_String *) \ | |
1177 | + (NBYTES) + 1 \ | |
1178 | + sizeof (EMACS_INT) - 1) \ | |
1179 | & ~(sizeof (EMACS_INT) - 1)) | |
1180 | ||
1181 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 GM |
1182 | |
1183 | /* Initialize string allocation. Called from init_alloc_once. */ | |
d457598b AS |
1184 | |
1185 | void | |
2e471eb5 | 1186 | init_strings () |
7146af97 | 1187 | { |
2e471eb5 GM |
1188 | total_strings = total_free_strings = total_string_size = 0; |
1189 | oldest_sblock = current_sblock = large_sblocks = NULL; | |
1190 | string_blocks = NULL; | |
1191 | n_string_blocks = 0; | |
1192 | string_free_list = NULL; | |
7146af97 JB |
1193 | } |
1194 | ||
2e471eb5 | 1195 | |
361b097f GM |
1196 | #ifdef GC_CHECK_STRING_BYTES |
1197 | ||
361b097f GM |
1198 | static int check_string_bytes_count; |
1199 | ||
676a7251 GM |
1200 | void check_string_bytes P_ ((int)); |
1201 | void check_sblock P_ ((struct sblock *)); | |
1202 | ||
1203 | #define CHECK_STRING_BYTES(S) STRING_BYTES (S) | |
1204 | ||
1205 | ||
1206 | /* Like GC_STRING_BYTES, but with debugging check. */ | |
1207 | ||
1208 | int | |
1209 | string_bytes (s) | |
1210 | struct Lisp_String *s; | |
1211 | { | |
1212 | int nbytes = (s->size_byte < 0 ? s->size : s->size_byte) & ~MARKBIT; | |
1213 | if (!PURE_POINTER_P (s) | |
1214 | && s->data | |
1215 | && nbytes != SDATA_NBYTES (SDATA_OF_STRING (s))) | |
1216 | abort (); | |
1217 | return nbytes; | |
1218 | } | |
1219 | ||
1220 | /* Check validity Lisp strings' string_bytes member in B. */ | |
1221 | ||
361b097f | 1222 | void |
676a7251 GM |
1223 | check_sblock (b) |
1224 | struct sblock *b; | |
361b097f | 1225 | { |
676a7251 | 1226 | struct sdata *from, *end, *from_end; |
361b097f | 1227 | |
676a7251 GM |
1228 | end = b->next_free; |
1229 | ||
1230 | for (from = &b->first_data; from < end; from = from_end) | |
361b097f | 1231 | { |
676a7251 GM |
1232 | /* Compute the next FROM here because copying below may |
1233 | overwrite data we need to compute it. */ | |
1234 | int nbytes; | |
361b097f | 1235 | |
676a7251 GM |
1236 | /* Check that the string size recorded in the string is the |
1237 | same as the one recorded in the sdata structure. */ | |
1238 | if (from->string) | |
1239 | CHECK_STRING_BYTES (from->string); | |
361b097f | 1240 | |
676a7251 GM |
1241 | if (from->string) |
1242 | nbytes = GC_STRING_BYTES (from->string); | |
1243 | else | |
1244 | nbytes = SDATA_NBYTES (from); | |
1245 | ||
1246 | nbytes = SDATA_SIZE (nbytes); | |
1247 | from_end = (struct sdata *) ((char *) from + nbytes); | |
1248 | } | |
1249 | } | |
361b097f | 1250 | |
676a7251 GM |
1251 | |
1252 | /* Check validity of Lisp strings' string_bytes member. ALL_P | |
1253 | non-zero means check all strings, otherwise check only most | |
1254 | recently allocated strings. Used for hunting a bug. */ | |
1255 | ||
1256 | void | |
1257 | check_string_bytes (all_p) | |
1258 | int all_p; | |
1259 | { | |
1260 | if (all_p) | |
1261 | { | |
1262 | struct sblock *b; | |
1263 | ||
1264 | for (b = large_sblocks; b; b = b->next) | |
1265 | { | |
1266 | struct Lisp_String *s = b->first_data.string; | |
1267 | if (s) | |
1268 | CHECK_STRING_BYTES (s); | |
361b097f | 1269 | } |
676a7251 GM |
1270 | |
1271 | for (b = oldest_sblock; b; b = b->next) | |
1272 | check_sblock (b); | |
361b097f | 1273 | } |
676a7251 GM |
1274 | else |
1275 | check_sblock (current_sblock); | |
361b097f GM |
1276 | } |
1277 | ||
1278 | #endif /* GC_CHECK_STRING_BYTES */ | |
1279 | ||
1280 | ||
2e471eb5 GM |
1281 | /* Return a new Lisp_String. */ |
1282 | ||
1283 | static struct Lisp_String * | |
1284 | allocate_string () | |
7146af97 | 1285 | { |
2e471eb5 | 1286 | struct Lisp_String *s; |
7146af97 | 1287 | |
2e471eb5 GM |
1288 | /* If the free-list is empty, allocate a new string_block, and |
1289 | add all the Lisp_Strings in it to the free-list. */ | |
1290 | if (string_free_list == NULL) | |
7146af97 | 1291 | { |
2e471eb5 GM |
1292 | struct string_block *b; |
1293 | int i; | |
1294 | ||
34400008 | 1295 | b = (struct string_block *) lisp_malloc (sizeof *b, MEM_TYPE_STRING); |
2e471eb5 GM |
1296 | VALIDATE_LISP_STORAGE (b, sizeof *b); |
1297 | bzero (b, sizeof *b); | |
1298 | b->next = string_blocks; | |
1299 | string_blocks = b; | |
1300 | ++n_string_blocks; | |
1301 | ||
1302 | for (i = STRINGS_IN_STRING_BLOCK - 1; i >= 0; --i) | |
7146af97 | 1303 | { |
2e471eb5 GM |
1304 | s = b->strings + i; |
1305 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1306 | string_free_list = s; | |
7146af97 | 1307 | } |
2e471eb5 GM |
1308 | |
1309 | total_free_strings += STRINGS_IN_STRING_BLOCK; | |
7146af97 | 1310 | } |
c0f51373 | 1311 | |
2e471eb5 GM |
1312 | /* Pop a Lisp_String off the free-list. */ |
1313 | s = string_free_list; | |
1314 | string_free_list = NEXT_FREE_LISP_STRING (s); | |
c0f51373 | 1315 | |
2e471eb5 GM |
1316 | /* Probably not strictly necessary, but play it safe. */ |
1317 | bzero (s, sizeof *s); | |
c0f51373 | 1318 | |
2e471eb5 GM |
1319 | --total_free_strings; |
1320 | ++total_strings; | |
1321 | ++strings_consed; | |
1322 | consing_since_gc += sizeof *s; | |
c0f51373 | 1323 | |
361b097f | 1324 | #ifdef GC_CHECK_STRING_BYTES |
83a96b4d AC |
1325 | if (!noninteractive |
1326 | #ifdef macintosh | |
1327 | && current_sblock | |
1328 | #endif | |
1329 | ) | |
361b097f | 1330 | { |
676a7251 GM |
1331 | if (++check_string_bytes_count == 200) |
1332 | { | |
1333 | check_string_bytes_count = 0; | |
1334 | check_string_bytes (1); | |
1335 | } | |
1336 | else | |
1337 | check_string_bytes (0); | |
361b097f | 1338 | } |
676a7251 | 1339 | #endif /* GC_CHECK_STRING_BYTES */ |
361b097f | 1340 | |
2e471eb5 | 1341 | return s; |
c0f51373 | 1342 | } |
7146af97 | 1343 | |
7146af97 | 1344 | |
2e471eb5 GM |
1345 | /* Set up Lisp_String S for holding NCHARS characters, NBYTES bytes, |
1346 | plus a NUL byte at the end. Allocate an sdata structure for S, and | |
1347 | set S->data to its `u.data' member. Store a NUL byte at the end of | |
1348 | S->data. Set S->size to NCHARS and S->size_byte to NBYTES. Free | |
1349 | S->data if it was initially non-null. */ | |
7146af97 | 1350 | |
2e471eb5 GM |
1351 | void |
1352 | allocate_string_data (s, nchars, nbytes) | |
1353 | struct Lisp_String *s; | |
1354 | int nchars, nbytes; | |
7146af97 | 1355 | { |
5c5fecb3 | 1356 | struct sdata *data, *old_data; |
2e471eb5 | 1357 | struct sblock *b; |
5c5fecb3 | 1358 | int needed, old_nbytes; |
7146af97 | 1359 | |
2e471eb5 GM |
1360 | /* Determine the number of bytes needed to store NBYTES bytes |
1361 | of string data. */ | |
1362 | needed = SDATA_SIZE (nbytes); | |
7146af97 | 1363 | |
2e471eb5 GM |
1364 | if (nbytes > LARGE_STRING_BYTES) |
1365 | { | |
675d5130 | 1366 | size_t size = sizeof *b - sizeof (struct sdata) + needed; |
2e471eb5 GM |
1367 | |
1368 | #ifdef DOUG_LEA_MALLOC | |
f8608968 GM |
1369 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
1370 | because mapped region contents are not preserved in | |
1371 | a dumped Emacs. */ | |
2e471eb5 GM |
1372 | mallopt (M_MMAP_MAX, 0); |
1373 | #endif | |
1374 | ||
34400008 | 1375 | b = (struct sblock *) lisp_malloc (size, MEM_TYPE_NON_LISP); |
2e471eb5 GM |
1376 | |
1377 | #ifdef DOUG_LEA_MALLOC | |
1378 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
1379 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
1380 | #endif | |
1381 | ||
1382 | b->next_free = &b->first_data; | |
1383 | b->first_data.string = NULL; | |
1384 | b->next = large_sblocks; | |
1385 | large_sblocks = b; | |
1386 | } | |
1387 | else if (current_sblock == NULL | |
1388 | || (((char *) current_sblock + SBLOCK_SIZE | |
1389 | - (char *) current_sblock->next_free) | |
1390 | < needed)) | |
1391 | { | |
1392 | /* Not enough room in the current sblock. */ | |
34400008 | 1393 | b = (struct sblock *) lisp_malloc (SBLOCK_SIZE, MEM_TYPE_NON_LISP); |
2e471eb5 GM |
1394 | b->next_free = &b->first_data; |
1395 | b->first_data.string = NULL; | |
1396 | b->next = NULL; | |
1397 | ||
1398 | if (current_sblock) | |
1399 | current_sblock->next = b; | |
1400 | else | |
1401 | oldest_sblock = b; | |
1402 | current_sblock = b; | |
1403 | } | |
1404 | else | |
1405 | b = current_sblock; | |
5c5fecb3 GM |
1406 | |
1407 | old_data = s->data ? SDATA_OF_STRING (s) : NULL; | |
1408 | old_nbytes = GC_STRING_BYTES (s); | |
2e471eb5 GM |
1409 | |
1410 | data = b->next_free; | |
1411 | data->string = s; | |
31d929e5 GM |
1412 | s->data = SDATA_DATA (data); |
1413 | #ifdef GC_CHECK_STRING_BYTES | |
1414 | SDATA_NBYTES (data) = nbytes; | |
1415 | #endif | |
2e471eb5 GM |
1416 | s->size = nchars; |
1417 | s->size_byte = nbytes; | |
1418 | s->data[nbytes] = '\0'; | |
1419 | b->next_free = (struct sdata *) ((char *) data + needed); | |
1420 | ||
5c5fecb3 GM |
1421 | /* If S had already data assigned, mark that as free by setting its |
1422 | string back-pointer to null, and recording the size of the data | |
00c9c33c | 1423 | in it. */ |
5c5fecb3 GM |
1424 | if (old_data) |
1425 | { | |
31d929e5 | 1426 | SDATA_NBYTES (old_data) = old_nbytes; |
5c5fecb3 GM |
1427 | old_data->string = NULL; |
1428 | } | |
1429 | ||
2e471eb5 GM |
1430 | consing_since_gc += needed; |
1431 | } | |
1432 | ||
1433 | ||
1434 | /* Sweep and compact strings. */ | |
1435 | ||
1436 | static void | |
1437 | sweep_strings () | |
1438 | { | |
1439 | struct string_block *b, *next; | |
1440 | struct string_block *live_blocks = NULL; | |
1441 | ||
1442 | string_free_list = NULL; | |
1443 | total_strings = total_free_strings = 0; | |
1444 | total_string_size = 0; | |
1445 | ||
1446 | /* Scan strings_blocks, free Lisp_Strings that aren't marked. */ | |
1447 | for (b = string_blocks; b; b = next) | |
1448 | { | |
1449 | int i, nfree = 0; | |
1450 | struct Lisp_String *free_list_before = string_free_list; | |
1451 | ||
1452 | next = b->next; | |
1453 | ||
1454 | for (i = 0; i < STRINGS_IN_STRING_BLOCK; ++i) | |
1455 | { | |
1456 | struct Lisp_String *s = b->strings + i; | |
1457 | ||
1458 | if (s->data) | |
1459 | { | |
1460 | /* String was not on free-list before. */ | |
1461 | if (STRING_MARKED_P (s)) | |
1462 | { | |
1463 | /* String is live; unmark it and its intervals. */ | |
1464 | UNMARK_STRING (s); | |
1465 | ||
1466 | if (!NULL_INTERVAL_P (s->intervals)) | |
1467 | UNMARK_BALANCE_INTERVALS (s->intervals); | |
1468 | ||
1469 | ++total_strings; | |
1470 | total_string_size += STRING_BYTES (s); | |
1471 | } | |
1472 | else | |
1473 | { | |
1474 | /* String is dead. Put it on the free-list. */ | |
1475 | struct sdata *data = SDATA_OF_STRING (s); | |
1476 | ||
1477 | /* Save the size of S in its sdata so that we know | |
1478 | how large that is. Reset the sdata's string | |
1479 | back-pointer so that we know it's free. */ | |
31d929e5 GM |
1480 | #ifdef GC_CHECK_STRING_BYTES |
1481 | if (GC_STRING_BYTES (s) != SDATA_NBYTES (data)) | |
1482 | abort (); | |
1483 | #else | |
2e471eb5 | 1484 | data->u.nbytes = GC_STRING_BYTES (s); |
31d929e5 | 1485 | #endif |
2e471eb5 GM |
1486 | data->string = NULL; |
1487 | ||
1488 | /* Reset the strings's `data' member so that we | |
1489 | know it's free. */ | |
1490 | s->data = NULL; | |
1491 | ||
1492 | /* Put the string on the free-list. */ | |
1493 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1494 | string_free_list = s; | |
1495 | ++nfree; | |
1496 | } | |
1497 | } | |
1498 | else | |
1499 | { | |
1500 | /* S was on the free-list before. Put it there again. */ | |
1501 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1502 | string_free_list = s; | |
1503 | ++nfree; | |
1504 | } | |
1505 | } | |
1506 | ||
34400008 | 1507 | /* Free blocks that contain free Lisp_Strings only, except |
2e471eb5 GM |
1508 | the first two of them. */ |
1509 | if (nfree == STRINGS_IN_STRING_BLOCK | |
1510 | && total_free_strings > STRINGS_IN_STRING_BLOCK) | |
1511 | { | |
1512 | lisp_free (b); | |
1513 | --n_string_blocks; | |
1514 | string_free_list = free_list_before; | |
1515 | } | |
1516 | else | |
1517 | { | |
1518 | total_free_strings += nfree; | |
1519 | b->next = live_blocks; | |
1520 | live_blocks = b; | |
1521 | } | |
1522 | } | |
1523 | ||
1524 | string_blocks = live_blocks; | |
1525 | free_large_strings (); | |
1526 | compact_small_strings (); | |
1527 | } | |
1528 | ||
1529 | ||
1530 | /* Free dead large strings. */ | |
1531 | ||
1532 | static void | |
1533 | free_large_strings () | |
1534 | { | |
1535 | struct sblock *b, *next; | |
1536 | struct sblock *live_blocks = NULL; | |
1537 | ||
1538 | for (b = large_sblocks; b; b = next) | |
1539 | { | |
1540 | next = b->next; | |
1541 | ||
1542 | if (b->first_data.string == NULL) | |
1543 | lisp_free (b); | |
1544 | else | |
1545 | { | |
1546 | b->next = live_blocks; | |
1547 | live_blocks = b; | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | large_sblocks = live_blocks; | |
1552 | } | |
1553 | ||
1554 | ||
1555 | /* Compact data of small strings. Free sblocks that don't contain | |
1556 | data of live strings after compaction. */ | |
1557 | ||
1558 | static void | |
1559 | compact_small_strings () | |
1560 | { | |
1561 | struct sblock *b, *tb, *next; | |
1562 | struct sdata *from, *to, *end, *tb_end; | |
1563 | struct sdata *to_end, *from_end; | |
1564 | ||
1565 | /* TB is the sblock we copy to, TO is the sdata within TB we copy | |
1566 | to, and TB_END is the end of TB. */ | |
1567 | tb = oldest_sblock; | |
1568 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
1569 | to = &tb->first_data; | |
1570 | ||
1571 | /* Step through the blocks from the oldest to the youngest. We | |
1572 | expect that old blocks will stabilize over time, so that less | |
1573 | copying will happen this way. */ | |
1574 | for (b = oldest_sblock; b; b = b->next) | |
1575 | { | |
1576 | end = b->next_free; | |
1577 | xassert ((char *) end <= (char *) b + SBLOCK_SIZE); | |
1578 | ||
1579 | for (from = &b->first_data; from < end; from = from_end) | |
1580 | { | |
1581 | /* Compute the next FROM here because copying below may | |
1582 | overwrite data we need to compute it. */ | |
1583 | int nbytes; | |
1584 | ||
31d929e5 GM |
1585 | #ifdef GC_CHECK_STRING_BYTES |
1586 | /* Check that the string size recorded in the string is the | |
1587 | same as the one recorded in the sdata structure. */ | |
1588 | if (from->string | |
1589 | && GC_STRING_BYTES (from->string) != SDATA_NBYTES (from)) | |
1590 | abort (); | |
1591 | #endif /* GC_CHECK_STRING_BYTES */ | |
1592 | ||
2e471eb5 GM |
1593 | if (from->string) |
1594 | nbytes = GC_STRING_BYTES (from->string); | |
1595 | else | |
31d929e5 | 1596 | nbytes = SDATA_NBYTES (from); |
2e471eb5 GM |
1597 | |
1598 | nbytes = SDATA_SIZE (nbytes); | |
1599 | from_end = (struct sdata *) ((char *) from + nbytes); | |
1600 | ||
1601 | /* FROM->string non-null means it's alive. Copy its data. */ | |
1602 | if (from->string) | |
1603 | { | |
1604 | /* If TB is full, proceed with the next sblock. */ | |
1605 | to_end = (struct sdata *) ((char *) to + nbytes); | |
1606 | if (to_end > tb_end) | |
1607 | { | |
1608 | tb->next_free = to; | |
1609 | tb = tb->next; | |
1610 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
1611 | to = &tb->first_data; | |
1612 | to_end = (struct sdata *) ((char *) to + nbytes); | |
1613 | } | |
1614 | ||
1615 | /* Copy, and update the string's `data' pointer. */ | |
1616 | if (from != to) | |
1617 | { | |
a2407477 GM |
1618 | xassert (tb != b || to <= from); |
1619 | safe_bcopy ((char *) from, (char *) to, nbytes); | |
31d929e5 | 1620 | to->string->data = SDATA_DATA (to); |
2e471eb5 GM |
1621 | } |
1622 | ||
1623 | /* Advance past the sdata we copied to. */ | |
1624 | to = to_end; | |
1625 | } | |
1626 | } | |
1627 | } | |
1628 | ||
1629 | /* The rest of the sblocks following TB don't contain live data, so | |
1630 | we can free them. */ | |
1631 | for (b = tb->next; b; b = next) | |
1632 | { | |
1633 | next = b->next; | |
1634 | lisp_free (b); | |
1635 | } | |
1636 | ||
1637 | tb->next_free = to; | |
1638 | tb->next = NULL; | |
1639 | current_sblock = tb; | |
1640 | } | |
1641 | ||
1642 | ||
1643 | DEFUN ("make-string", Fmake_string, Smake_string, 2, 2, 0, | |
1644 | "Return a newly created string of length LENGTH, with each element being INIT.\n\ | |
1645 | Both LENGTH and INIT must be numbers.") | |
1646 | (length, init) | |
1647 | Lisp_Object length, init; | |
1648 | { | |
1649 | register Lisp_Object val; | |
1650 | register unsigned char *p, *end; | |
1651 | int c, nbytes; | |
1652 | ||
1653 | CHECK_NATNUM (length, 0); | |
1654 | CHECK_NUMBER (init, 1); | |
1655 | ||
1656 | c = XINT (init); | |
1657 | if (SINGLE_BYTE_CHAR_P (c)) | |
1658 | { | |
1659 | nbytes = XINT (length); | |
1660 | val = make_uninit_string (nbytes); | |
1661 | p = XSTRING (val)->data; | |
1662 | end = p + XSTRING (val)->size; | |
1663 | while (p != end) | |
1664 | *p++ = c; | |
1665 | } | |
1666 | else | |
1667 | { | |
d942b71c | 1668 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2e471eb5 GM |
1669 | int len = CHAR_STRING (c, str); |
1670 | ||
1671 | nbytes = len * XINT (length); | |
1672 | val = make_uninit_multibyte_string (XINT (length), nbytes); | |
1673 | p = XSTRING (val)->data; | |
1674 | end = p + nbytes; | |
1675 | while (p != end) | |
1676 | { | |
1677 | bcopy (str, p, len); | |
1678 | p += len; | |
1679 | } | |
1680 | } | |
1681 | ||
1682 | *p = 0; | |
1683 | return val; | |
1684 | } | |
1685 | ||
1686 | ||
1687 | DEFUN ("make-bool-vector", Fmake_bool_vector, Smake_bool_vector, 2, 2, 0, | |
1688 | "Return a new bool-vector of length LENGTH, using INIT for as each element.\n\ | |
1689 | LENGTH must be a number. INIT matters only in whether it is t or nil.") | |
1690 | (length, init) | |
1691 | Lisp_Object length, init; | |
1692 | { | |
1693 | register Lisp_Object val; | |
1694 | struct Lisp_Bool_Vector *p; | |
1695 | int real_init, i; | |
1696 | int length_in_chars, length_in_elts, bits_per_value; | |
1697 | ||
1698 | CHECK_NATNUM (length, 0); | |
1699 | ||
1700 | bits_per_value = sizeof (EMACS_INT) * BITS_PER_CHAR; | |
1701 | ||
1702 | length_in_elts = (XFASTINT (length) + bits_per_value - 1) / bits_per_value; | |
1703 | length_in_chars = ((XFASTINT (length) + BITS_PER_CHAR - 1) / BITS_PER_CHAR); | |
1704 | ||
1705 | /* We must allocate one more elements than LENGTH_IN_ELTS for the | |
1706 | slot `size' of the struct Lisp_Bool_Vector. */ | |
1707 | val = Fmake_vector (make_number (length_in_elts + 1), Qnil); | |
1708 | p = XBOOL_VECTOR (val); | |
34400008 | 1709 | |
2e471eb5 GM |
1710 | /* Get rid of any bits that would cause confusion. */ |
1711 | p->vector_size = 0; | |
1712 | XSETBOOL_VECTOR (val, p); | |
1713 | p->size = XFASTINT (length); | |
1714 | ||
1715 | real_init = (NILP (init) ? 0 : -1); | |
1716 | for (i = 0; i < length_in_chars ; i++) | |
1717 | p->data[i] = real_init; | |
34400008 | 1718 | |
2e471eb5 GM |
1719 | /* Clear the extraneous bits in the last byte. */ |
1720 | if (XINT (length) != length_in_chars * BITS_PER_CHAR) | |
1721 | XBOOL_VECTOR (val)->data[length_in_chars - 1] | |
1722 | &= (1 << (XINT (length) % BITS_PER_CHAR)) - 1; | |
1723 | ||
1724 | return val; | |
1725 | } | |
1726 | ||
1727 | ||
1728 | /* Make a string from NBYTES bytes at CONTENTS, and compute the number | |
1729 | of characters from the contents. This string may be unibyte or | |
1730 | multibyte, depending on the contents. */ | |
1731 | ||
1732 | Lisp_Object | |
1733 | make_string (contents, nbytes) | |
1734 | char *contents; | |
1735 | int nbytes; | |
1736 | { | |
1737 | register Lisp_Object val; | |
9eac9d59 KH |
1738 | int nchars, multibyte_nbytes; |
1739 | ||
1740 | parse_str_as_multibyte (contents, nbytes, &nchars, &multibyte_nbytes); | |
9eac9d59 KH |
1741 | if (nbytes == nchars || nbytes != multibyte_nbytes) |
1742 | /* CONTENTS contains no multibyte sequences or contains an invalid | |
1743 | multibyte sequence. We must make unibyte string. */ | |
495a6df3 KH |
1744 | val = make_unibyte_string (contents, nbytes); |
1745 | else | |
1746 | val = make_multibyte_string (contents, nchars, nbytes); | |
2e471eb5 GM |
1747 | return val; |
1748 | } | |
1749 | ||
1750 | ||
1751 | /* Make an unibyte string from LENGTH bytes at CONTENTS. */ | |
1752 | ||
1753 | Lisp_Object | |
1754 | make_unibyte_string (contents, length) | |
1755 | char *contents; | |
1756 | int length; | |
1757 | { | |
1758 | register Lisp_Object val; | |
1759 | val = make_uninit_string (length); | |
1760 | bcopy (contents, XSTRING (val)->data, length); | |
1761 | SET_STRING_BYTES (XSTRING (val), -1); | |
1762 | return val; | |
1763 | } | |
1764 | ||
1765 | ||
1766 | /* Make a multibyte string from NCHARS characters occupying NBYTES | |
1767 | bytes at CONTENTS. */ | |
1768 | ||
1769 | Lisp_Object | |
1770 | make_multibyte_string (contents, nchars, nbytes) | |
1771 | char *contents; | |
1772 | int nchars, nbytes; | |
1773 | { | |
1774 | register Lisp_Object val; | |
1775 | val = make_uninit_multibyte_string (nchars, nbytes); | |
1776 | bcopy (contents, XSTRING (val)->data, nbytes); | |
1777 | return val; | |
1778 | } | |
1779 | ||
1780 | ||
1781 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
1782 | CONTENTS. It is a multibyte string if NBYTES != NCHARS. */ | |
1783 | ||
1784 | Lisp_Object | |
1785 | make_string_from_bytes (contents, nchars, nbytes) | |
1786 | char *contents; | |
1787 | int nchars, nbytes; | |
1788 | { | |
1789 | register Lisp_Object val; | |
1790 | val = make_uninit_multibyte_string (nchars, nbytes); | |
1791 | bcopy (contents, XSTRING (val)->data, nbytes); | |
1792 | if (STRING_BYTES (XSTRING (val)) == XSTRING (val)->size) | |
1793 | SET_STRING_BYTES (XSTRING (val), -1); | |
1794 | return val; | |
1795 | } | |
1796 | ||
1797 | ||
1798 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
1799 | CONTENTS. The argument MULTIBYTE controls whether to label the | |
1800 | string as multibyte. */ | |
1801 | ||
1802 | Lisp_Object | |
1803 | make_specified_string (contents, nchars, nbytes, multibyte) | |
1804 | char *contents; | |
1805 | int nchars, nbytes; | |
1806 | int multibyte; | |
1807 | { | |
1808 | register Lisp_Object val; | |
1809 | val = make_uninit_multibyte_string (nchars, nbytes); | |
1810 | bcopy (contents, XSTRING (val)->data, nbytes); | |
1811 | if (!multibyte) | |
1812 | SET_STRING_BYTES (XSTRING (val), -1); | |
1813 | return val; | |
1814 | } | |
1815 | ||
1816 | ||
1817 | /* Make a string from the data at STR, treating it as multibyte if the | |
1818 | data warrants. */ | |
1819 | ||
1820 | Lisp_Object | |
1821 | build_string (str) | |
1822 | char *str; | |
1823 | { | |
1824 | return make_string (str, strlen (str)); | |
1825 | } | |
1826 | ||
1827 | ||
1828 | /* Return an unibyte Lisp_String set up to hold LENGTH characters | |
1829 | occupying LENGTH bytes. */ | |
1830 | ||
1831 | Lisp_Object | |
1832 | make_uninit_string (length) | |
1833 | int length; | |
1834 | { | |
1835 | Lisp_Object val; | |
1836 | val = make_uninit_multibyte_string (length, length); | |
1837 | SET_STRING_BYTES (XSTRING (val), -1); | |
1838 | return val; | |
1839 | } | |
1840 | ||
1841 | ||
1842 | /* Return a multibyte Lisp_String set up to hold NCHARS characters | |
1843 | which occupy NBYTES bytes. */ | |
1844 | ||
1845 | Lisp_Object | |
1846 | make_uninit_multibyte_string (nchars, nbytes) | |
1847 | int nchars, nbytes; | |
1848 | { | |
1849 | Lisp_Object string; | |
1850 | struct Lisp_String *s; | |
1851 | ||
1852 | if (nchars < 0) | |
1853 | abort (); | |
1854 | ||
1855 | s = allocate_string (); | |
1856 | allocate_string_data (s, nchars, nbytes); | |
1857 | XSETSTRING (string, s); | |
1858 | string_chars_consed += nbytes; | |
1859 | return string; | |
1860 | } | |
1861 | ||
1862 | ||
1863 | \f | |
1864 | /*********************************************************************** | |
1865 | Float Allocation | |
1866 | ***********************************************************************/ | |
1867 | ||
2e471eb5 GM |
1868 | /* We store float cells inside of float_blocks, allocating a new |
1869 | float_block with malloc whenever necessary. Float cells reclaimed | |
1870 | by GC are put on a free list to be reallocated before allocating | |
1871 | any new float cells from the latest float_block. | |
1872 | ||
1873 | Each float_block is just under 1020 bytes long, since malloc really | |
1874 | allocates in units of powers of two and uses 4 bytes for its own | |
1875 | overhead. */ | |
1876 | ||
1877 | #define FLOAT_BLOCK_SIZE \ | |
1878 | ((1020 - sizeof (struct float_block *)) / sizeof (struct Lisp_Float)) | |
1879 | ||
1880 | struct float_block | |
1881 | { | |
1882 | struct float_block *next; | |
1883 | struct Lisp_Float floats[FLOAT_BLOCK_SIZE]; | |
1884 | }; | |
1885 | ||
34400008 GM |
1886 | /* Current float_block. */ |
1887 | ||
2e471eb5 | 1888 | struct float_block *float_block; |
34400008 GM |
1889 | |
1890 | /* Index of first unused Lisp_Float in the current float_block. */ | |
1891 | ||
2e471eb5 GM |
1892 | int float_block_index; |
1893 | ||
1894 | /* Total number of float blocks now in use. */ | |
1895 | ||
1896 | int n_float_blocks; | |
1897 | ||
34400008 GM |
1898 | /* Free-list of Lisp_Floats. */ |
1899 | ||
2e471eb5 GM |
1900 | struct Lisp_Float *float_free_list; |
1901 | ||
34400008 GM |
1902 | |
1903 | /* Initialze float allocation. */ | |
1904 | ||
2e471eb5 GM |
1905 | void |
1906 | init_float () | |
1907 | { | |
34400008 GM |
1908 | float_block = (struct float_block *) lisp_malloc (sizeof *float_block, |
1909 | MEM_TYPE_FLOAT); | |
2e471eb5 GM |
1910 | float_block->next = 0; |
1911 | bzero ((char *) float_block->floats, sizeof float_block->floats); | |
1912 | float_block_index = 0; | |
1913 | float_free_list = 0; | |
1914 | n_float_blocks = 1; | |
1915 | } | |
1916 | ||
34400008 GM |
1917 | |
1918 | /* Explicitly free a float cell by putting it on the free-list. */ | |
2e471eb5 GM |
1919 | |
1920 | void | |
1921 | free_float (ptr) | |
1922 | struct Lisp_Float *ptr; | |
1923 | { | |
1924 | *(struct Lisp_Float **)&ptr->data = float_free_list; | |
34400008 GM |
1925 | #if GC_MARK_STACK |
1926 | ptr->type = Vdead; | |
1927 | #endif | |
2e471eb5 GM |
1928 | float_free_list = ptr; |
1929 | } | |
1930 | ||
34400008 GM |
1931 | |
1932 | /* Return a new float object with value FLOAT_VALUE. */ | |
1933 | ||
2e471eb5 GM |
1934 | Lisp_Object |
1935 | make_float (float_value) | |
1936 | double float_value; | |
1937 | { | |
1938 | register Lisp_Object val; | |
1939 | ||
1940 | if (float_free_list) | |
1941 | { | |
1942 | /* We use the data field for chaining the free list | |
1943 | so that we won't use the same field that has the mark bit. */ | |
1944 | XSETFLOAT (val, float_free_list); | |
1945 | float_free_list = *(struct Lisp_Float **)&float_free_list->data; | |
1946 | } | |
1947 | else | |
1948 | { | |
1949 | if (float_block_index == FLOAT_BLOCK_SIZE) | |
1950 | { | |
1951 | register struct float_block *new; | |
1952 | ||
34400008 GM |
1953 | new = (struct float_block *) lisp_malloc (sizeof *new, |
1954 | MEM_TYPE_FLOAT); | |
2e471eb5 GM |
1955 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
1956 | new->next = float_block; | |
1957 | float_block = new; | |
1958 | float_block_index = 0; | |
1959 | n_float_blocks++; | |
1960 | } | |
1961 | XSETFLOAT (val, &float_block->floats[float_block_index++]); | |
1962 | } | |
1963 | ||
1964 | XFLOAT_DATA (val) = float_value; | |
1965 | XSETFASTINT (XFLOAT (val)->type, 0); /* bug chasing -wsr */ | |
1966 | consing_since_gc += sizeof (struct Lisp_Float); | |
1967 | floats_consed++; | |
1968 | return val; | |
1969 | } | |
1970 | ||
2e471eb5 GM |
1971 | |
1972 | \f | |
1973 | /*********************************************************************** | |
1974 | Cons Allocation | |
1975 | ***********************************************************************/ | |
1976 | ||
1977 | /* We store cons cells inside of cons_blocks, allocating a new | |
1978 | cons_block with malloc whenever necessary. Cons cells reclaimed by | |
1979 | GC are put on a free list to be reallocated before allocating | |
1980 | any new cons cells from the latest cons_block. | |
1981 | ||
1982 | Each cons_block is just under 1020 bytes long, | |
1983 | since malloc really allocates in units of powers of two | |
1984 | and uses 4 bytes for its own overhead. */ | |
1985 | ||
1986 | #define CONS_BLOCK_SIZE \ | |
1987 | ((1020 - sizeof (struct cons_block *)) / sizeof (struct Lisp_Cons)) | |
1988 | ||
1989 | struct cons_block | |
1990 | { | |
1991 | struct cons_block *next; | |
1992 | struct Lisp_Cons conses[CONS_BLOCK_SIZE]; | |
1993 | }; | |
1994 | ||
34400008 GM |
1995 | /* Current cons_block. */ |
1996 | ||
2e471eb5 | 1997 | struct cons_block *cons_block; |
34400008 GM |
1998 | |
1999 | /* Index of first unused Lisp_Cons in the current block. */ | |
2000 | ||
2e471eb5 GM |
2001 | int cons_block_index; |
2002 | ||
34400008 GM |
2003 | /* Free-list of Lisp_Cons structures. */ |
2004 | ||
2e471eb5 GM |
2005 | struct Lisp_Cons *cons_free_list; |
2006 | ||
2007 | /* Total number of cons blocks now in use. */ | |
2008 | ||
2009 | int n_cons_blocks; | |
2010 | ||
34400008 GM |
2011 | |
2012 | /* Initialize cons allocation. */ | |
2013 | ||
2e471eb5 GM |
2014 | void |
2015 | init_cons () | |
2016 | { | |
34400008 GM |
2017 | cons_block = (struct cons_block *) lisp_malloc (sizeof *cons_block, |
2018 | MEM_TYPE_CONS); | |
2e471eb5 GM |
2019 | cons_block->next = 0; |
2020 | bzero ((char *) cons_block->conses, sizeof cons_block->conses); | |
2021 | cons_block_index = 0; | |
2022 | cons_free_list = 0; | |
2023 | n_cons_blocks = 1; | |
2024 | } | |
2025 | ||
34400008 GM |
2026 | |
2027 | /* Explicitly free a cons cell by putting it on the free-list. */ | |
2e471eb5 GM |
2028 | |
2029 | void | |
2030 | free_cons (ptr) | |
2031 | struct Lisp_Cons *ptr; | |
2032 | { | |
2033 | *(struct Lisp_Cons **)&ptr->cdr = cons_free_list; | |
34400008 GM |
2034 | #if GC_MARK_STACK |
2035 | ptr->car = Vdead; | |
2036 | #endif | |
2e471eb5 GM |
2037 | cons_free_list = ptr; |
2038 | } | |
2039 | ||
34400008 | 2040 | |
2e471eb5 GM |
2041 | DEFUN ("cons", Fcons, Scons, 2, 2, 0, |
2042 | "Create a new cons, give it CAR and CDR as components, and return it.") | |
2043 | (car, cdr) | |
2044 | Lisp_Object car, cdr; | |
2045 | { | |
2046 | register Lisp_Object val; | |
2047 | ||
2048 | if (cons_free_list) | |
2049 | { | |
2050 | /* We use the cdr for chaining the free list | |
2051 | so that we won't use the same field that has the mark bit. */ | |
2052 | XSETCONS (val, cons_free_list); | |
2053 | cons_free_list = *(struct Lisp_Cons **)&cons_free_list->cdr; | |
2054 | } | |
2055 | else | |
2056 | { | |
2057 | if (cons_block_index == CONS_BLOCK_SIZE) | |
2058 | { | |
2059 | register struct cons_block *new; | |
34400008 GM |
2060 | new = (struct cons_block *) lisp_malloc (sizeof *new, |
2061 | MEM_TYPE_CONS); | |
2e471eb5 GM |
2062 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
2063 | new->next = cons_block; | |
2064 | cons_block = new; | |
2065 | cons_block_index = 0; | |
2066 | n_cons_blocks++; | |
2067 | } | |
2068 | XSETCONS (val, &cons_block->conses[cons_block_index++]); | |
2069 | } | |
2070 | ||
2071 | XCAR (val) = car; | |
2072 | XCDR (val) = cdr; | |
2073 | consing_since_gc += sizeof (struct Lisp_Cons); | |
2074 | cons_cells_consed++; | |
2075 | return val; | |
2076 | } | |
2077 | ||
34400008 | 2078 | |
2e471eb5 GM |
2079 | /* Make a list of 2, 3, 4 or 5 specified objects. */ |
2080 | ||
2081 | Lisp_Object | |
2082 | list2 (arg1, arg2) | |
2083 | Lisp_Object arg1, arg2; | |
2084 | { | |
2085 | return Fcons (arg1, Fcons (arg2, Qnil)); | |
2086 | } | |
2087 | ||
34400008 | 2088 | |
2e471eb5 GM |
2089 | Lisp_Object |
2090 | list3 (arg1, arg2, arg3) | |
2091 | Lisp_Object arg1, arg2, arg3; | |
2092 | { | |
2093 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Qnil))); | |
2094 | } | |
2095 | ||
34400008 | 2096 | |
2e471eb5 GM |
2097 | Lisp_Object |
2098 | list4 (arg1, arg2, arg3, arg4) | |
2099 | Lisp_Object arg1, arg2, arg3, arg4; | |
2100 | { | |
2101 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, Qnil)))); | |
2102 | } | |
2103 | ||
34400008 | 2104 | |
2e471eb5 GM |
2105 | Lisp_Object |
2106 | list5 (arg1, arg2, arg3, arg4, arg5) | |
2107 | Lisp_Object arg1, arg2, arg3, arg4, arg5; | |
2108 | { | |
2109 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, | |
2110 | Fcons (arg5, Qnil))))); | |
2111 | } | |
2112 | ||
34400008 | 2113 | |
2e471eb5 GM |
2114 | DEFUN ("list", Flist, Slist, 0, MANY, 0, |
2115 | "Return a newly created list with specified arguments as elements.\n\ | |
2116 | Any number of arguments, even zero arguments, are allowed.") | |
2117 | (nargs, args) | |
2118 | int nargs; | |
2119 | register Lisp_Object *args; | |
2120 | { | |
2121 | register Lisp_Object val; | |
2122 | val = Qnil; | |
2123 | ||
2124 | while (nargs > 0) | |
2125 | { | |
2126 | nargs--; | |
2127 | val = Fcons (args[nargs], val); | |
2128 | } | |
2129 | return val; | |
2130 | } | |
2131 | ||
34400008 | 2132 | |
2e471eb5 GM |
2133 | DEFUN ("make-list", Fmake_list, Smake_list, 2, 2, 0, |
2134 | "Return a newly created list of length LENGTH, with each element being INIT.") | |
2135 | (length, init) | |
2136 | register Lisp_Object length, init; | |
2137 | { | |
2138 | register Lisp_Object val; | |
2139 | register int size; | |
2140 | ||
2141 | CHECK_NATNUM (length, 0); | |
2142 | size = XFASTINT (length); | |
2143 | ||
2144 | val = Qnil; | |
7146af97 JB |
2145 | while (size-- > 0) |
2146 | val = Fcons (init, val); | |
2147 | return val; | |
2148 | } | |
2e471eb5 GM |
2149 | |
2150 | ||
7146af97 | 2151 | \f |
2e471eb5 GM |
2152 | /*********************************************************************** |
2153 | Vector Allocation | |
2154 | ***********************************************************************/ | |
7146af97 | 2155 | |
34400008 GM |
2156 | /* Singly-linked list of all vectors. */ |
2157 | ||
7146af97 JB |
2158 | struct Lisp_Vector *all_vectors; |
2159 | ||
2e471eb5 GM |
2160 | /* Total number of vector-like objects now in use. */ |
2161 | ||
c8099634 RS |
2162 | int n_vectors; |
2163 | ||
34400008 GM |
2164 | |
2165 | /* Value is a pointer to a newly allocated Lisp_Vector structure | |
2166 | with room for LEN Lisp_Objects. */ | |
2167 | ||
1825c68d KH |
2168 | struct Lisp_Vector * |
2169 | allocate_vectorlike (len) | |
2170 | EMACS_INT len; | |
2171 | { | |
2172 | struct Lisp_Vector *p; | |
675d5130 | 2173 | size_t nbytes; |
1825c68d | 2174 | |
d1658221 | 2175 | #ifdef DOUG_LEA_MALLOC |
f8608968 GM |
2176 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
2177 | because mapped region contents are not preserved in | |
2178 | a dumped Emacs. */ | |
d1658221 RS |
2179 | mallopt (M_MMAP_MAX, 0); |
2180 | #endif | |
34400008 GM |
2181 | |
2182 | nbytes = sizeof *p + (len - 1) * sizeof p->contents[0]; | |
2183 | p = (struct Lisp_Vector *) lisp_malloc (nbytes, MEM_TYPE_VECTOR); | |
2184 | ||
d1658221 | 2185 | #ifdef DOUG_LEA_MALLOC |
34400008 | 2186 | /* Back to a reasonable maximum of mmap'ed areas. */ |
81d492d5 | 2187 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); |
d1658221 | 2188 | #endif |
34400008 | 2189 | |
1825c68d | 2190 | VALIDATE_LISP_STORAGE (p, 0); |
34400008 | 2191 | consing_since_gc += nbytes; |
310ea200 | 2192 | vector_cells_consed += len; |
1825c68d KH |
2193 | |
2194 | p->next = all_vectors; | |
2195 | all_vectors = p; | |
34400008 | 2196 | ++n_vectors; |
1825c68d KH |
2197 | return p; |
2198 | } | |
2199 | ||
34400008 | 2200 | |
7146af97 JB |
2201 | DEFUN ("make-vector", Fmake_vector, Smake_vector, 2, 2, 0, |
2202 | "Return a newly created vector of length LENGTH, with each element being INIT.\n\ | |
2203 | See also the function `vector'.") | |
2204 | (length, init) | |
2205 | register Lisp_Object length, init; | |
2206 | { | |
1825c68d KH |
2207 | Lisp_Object vector; |
2208 | register EMACS_INT sizei; | |
2209 | register int index; | |
7146af97 JB |
2210 | register struct Lisp_Vector *p; |
2211 | ||
c9dad5ed KH |
2212 | CHECK_NATNUM (length, 0); |
2213 | sizei = XFASTINT (length); | |
7146af97 | 2214 | |
1825c68d | 2215 | p = allocate_vectorlike (sizei); |
7146af97 | 2216 | p->size = sizei; |
7146af97 JB |
2217 | for (index = 0; index < sizei; index++) |
2218 | p->contents[index] = init; | |
2219 | ||
1825c68d | 2220 | XSETVECTOR (vector, p); |
7146af97 JB |
2221 | return vector; |
2222 | } | |
2223 | ||
34400008 | 2224 | |
a59de17b | 2225 | DEFUN ("make-char-table", Fmake_char_table, Smake_char_table, 1, 2, 0, |
c58b2b4d | 2226 | "Return a newly created char-table, with purpose PURPOSE.\n\ |
7b07587b | 2227 | Each element is initialized to INIT, which defaults to nil.\n\ |
d7cd5d4f | 2228 | PURPOSE should be a symbol which has a `char-table-extra-slots' property.\n\ |
a59de17b RS |
2229 | The property's value should be an integer between 0 and 10.") |
2230 | (purpose, init) | |
2231 | register Lisp_Object purpose, init; | |
7b07587b RS |
2232 | { |
2233 | Lisp_Object vector; | |
a59de17b RS |
2234 | Lisp_Object n; |
2235 | CHECK_SYMBOL (purpose, 1); | |
0551bde3 | 2236 | n = Fget (purpose, Qchar_table_extra_slots); |
a59de17b | 2237 | CHECK_NUMBER (n, 0); |
7b07587b RS |
2238 | if (XINT (n) < 0 || XINT (n) > 10) |
2239 | args_out_of_range (n, Qnil); | |
2240 | /* Add 2 to the size for the defalt and parent slots. */ | |
2241 | vector = Fmake_vector (make_number (CHAR_TABLE_STANDARD_SLOTS + XINT (n)), | |
2242 | init); | |
0551bde3 | 2243 | XCHAR_TABLE (vector)->top = Qt; |
c96a008c | 2244 | XCHAR_TABLE (vector)->parent = Qnil; |
a59de17b | 2245 | XCHAR_TABLE (vector)->purpose = purpose; |
7b07587b RS |
2246 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); |
2247 | return vector; | |
2248 | } | |
2249 | ||
34400008 | 2250 | |
0551bde3 KH |
2251 | /* Return a newly created sub char table with default value DEFALT. |
2252 | Since a sub char table does not appear as a top level Emacs Lisp | |
2253 | object, we don't need a Lisp interface to make it. */ | |
2254 | ||
2255 | Lisp_Object | |
2256 | make_sub_char_table (defalt) | |
2257 | Lisp_Object defalt; | |
2258 | { | |
2259 | Lisp_Object vector | |
2260 | = Fmake_vector (make_number (SUB_CHAR_TABLE_STANDARD_SLOTS), Qnil); | |
2261 | XCHAR_TABLE (vector)->top = Qnil; | |
2262 | XCHAR_TABLE (vector)->defalt = defalt; | |
2263 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); | |
2264 | return vector; | |
2265 | } | |
2266 | ||
34400008 | 2267 | |
7146af97 JB |
2268 | DEFUN ("vector", Fvector, Svector, 0, MANY, 0, |
2269 | "Return a newly created vector with specified arguments as elements.\n\ | |
2270 | Any number of arguments, even zero arguments, are allowed.") | |
2271 | (nargs, args) | |
2272 | register int nargs; | |
2273 | Lisp_Object *args; | |
2274 | { | |
2275 | register Lisp_Object len, val; | |
2276 | register int index; | |
2277 | register struct Lisp_Vector *p; | |
2278 | ||
67ba9986 | 2279 | XSETFASTINT (len, nargs); |
7146af97 JB |
2280 | val = Fmake_vector (len, Qnil); |
2281 | p = XVECTOR (val); | |
2282 | for (index = 0; index < nargs; index++) | |
2283 | p->contents[index] = args[index]; | |
2284 | return val; | |
2285 | } | |
2286 | ||
34400008 | 2287 | |
7146af97 JB |
2288 | DEFUN ("make-byte-code", Fmake_byte_code, Smake_byte_code, 4, MANY, 0, |
2289 | "Create a byte-code object with specified arguments as elements.\n\ | |
2290 | The arguments should be the arglist, bytecode-string, constant vector,\n\ | |
2291 | stack size, (optional) doc string, and (optional) interactive spec.\n\ | |
2292 | The first four arguments are required; at most six have any\n\ | |
2293 | significance.") | |
2294 | (nargs, args) | |
2295 | register int nargs; | |
2296 | Lisp_Object *args; | |
2297 | { | |
2298 | register Lisp_Object len, val; | |
2299 | register int index; | |
2300 | register struct Lisp_Vector *p; | |
2301 | ||
67ba9986 | 2302 | XSETFASTINT (len, nargs); |
265a9e55 | 2303 | if (!NILP (Vpurify_flag)) |
5a053ea9 | 2304 | val = make_pure_vector ((EMACS_INT) nargs); |
7146af97 JB |
2305 | else |
2306 | val = Fmake_vector (len, Qnil); | |
9eac9d59 KH |
2307 | |
2308 | if (STRINGP (args[1]) && STRING_MULTIBYTE (args[1])) | |
2309 | /* BYTECODE-STRING must have been produced by Emacs 20.2 or the | |
2310 | earlier because they produced a raw 8-bit string for byte-code | |
2311 | and now such a byte-code string is loaded as multibyte while | |
2312 | raw 8-bit characters converted to multibyte form. Thus, now we | |
2313 | must convert them back to the original unibyte form. */ | |
2314 | args[1] = Fstring_as_unibyte (args[1]); | |
2315 | ||
7146af97 JB |
2316 | p = XVECTOR (val); |
2317 | for (index = 0; index < nargs; index++) | |
2318 | { | |
265a9e55 | 2319 | if (!NILP (Vpurify_flag)) |
7146af97 JB |
2320 | args[index] = Fpurecopy (args[index]); |
2321 | p->contents[index] = args[index]; | |
2322 | } | |
50aee051 | 2323 | XSETCOMPILED (val, p); |
7146af97 JB |
2324 | return val; |
2325 | } | |
2e471eb5 | 2326 | |
34400008 | 2327 | |
7146af97 | 2328 | \f |
2e471eb5 GM |
2329 | /*********************************************************************** |
2330 | Symbol Allocation | |
2331 | ***********************************************************************/ | |
7146af97 | 2332 | |
2e471eb5 GM |
2333 | /* Each symbol_block is just under 1020 bytes long, since malloc |
2334 | really allocates in units of powers of two and uses 4 bytes for its | |
2335 | own overhead. */ | |
7146af97 JB |
2336 | |
2337 | #define SYMBOL_BLOCK_SIZE \ | |
2338 | ((1020 - sizeof (struct symbol_block *)) / sizeof (struct Lisp_Symbol)) | |
2339 | ||
2340 | struct symbol_block | |
2e471eb5 GM |
2341 | { |
2342 | struct symbol_block *next; | |
2343 | struct Lisp_Symbol symbols[SYMBOL_BLOCK_SIZE]; | |
2344 | }; | |
7146af97 | 2345 | |
34400008 GM |
2346 | /* Current symbol block and index of first unused Lisp_Symbol |
2347 | structure in it. */ | |
2348 | ||
7146af97 JB |
2349 | struct symbol_block *symbol_block; |
2350 | int symbol_block_index; | |
2351 | ||
34400008 GM |
2352 | /* List of free symbols. */ |
2353 | ||
7146af97 JB |
2354 | struct Lisp_Symbol *symbol_free_list; |
2355 | ||
c8099634 | 2356 | /* Total number of symbol blocks now in use. */ |
2e471eb5 | 2357 | |
c8099634 RS |
2358 | int n_symbol_blocks; |
2359 | ||
34400008 GM |
2360 | |
2361 | /* Initialize symbol allocation. */ | |
2362 | ||
7146af97 JB |
2363 | void |
2364 | init_symbol () | |
2365 | { | |
34400008 GM |
2366 | symbol_block = (struct symbol_block *) lisp_malloc (sizeof *symbol_block, |
2367 | MEM_TYPE_SYMBOL); | |
7146af97 | 2368 | symbol_block->next = 0; |
290c8f1e | 2369 | bzero ((char *) symbol_block->symbols, sizeof symbol_block->symbols); |
7146af97 JB |
2370 | symbol_block_index = 0; |
2371 | symbol_free_list = 0; | |
c8099634 | 2372 | n_symbol_blocks = 1; |
7146af97 JB |
2373 | } |
2374 | ||
34400008 | 2375 | |
7146af97 JB |
2376 | DEFUN ("make-symbol", Fmake_symbol, Smake_symbol, 1, 1, 0, |
2377 | "Return a newly allocated uninterned symbol whose name is NAME.\n\ | |
2378 | Its value and function definition are void, and its property list is nil.") | |
54ee42dd EN |
2379 | (name) |
2380 | Lisp_Object name; | |
7146af97 JB |
2381 | { |
2382 | register Lisp_Object val; | |
2383 | register struct Lisp_Symbol *p; | |
2384 | ||
54ee42dd | 2385 | CHECK_STRING (name, 0); |
7146af97 JB |
2386 | |
2387 | if (symbol_free_list) | |
2388 | { | |
45d12a89 | 2389 | XSETSYMBOL (val, symbol_free_list); |
85481507 | 2390 | symbol_free_list = *(struct Lisp_Symbol **)&symbol_free_list->value; |
7146af97 JB |
2391 | } |
2392 | else | |
2393 | { | |
2394 | if (symbol_block_index == SYMBOL_BLOCK_SIZE) | |
2395 | { | |
3c06d205 | 2396 | struct symbol_block *new; |
34400008 GM |
2397 | new = (struct symbol_block *) lisp_malloc (sizeof *new, |
2398 | MEM_TYPE_SYMBOL); | |
7146af97 JB |
2399 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
2400 | new->next = symbol_block; | |
2401 | symbol_block = new; | |
2402 | symbol_block_index = 0; | |
c8099634 | 2403 | n_symbol_blocks++; |
7146af97 | 2404 | } |
45d12a89 | 2405 | XSETSYMBOL (val, &symbol_block->symbols[symbol_block_index++]); |
7146af97 | 2406 | } |
2e471eb5 | 2407 | |
7146af97 | 2408 | p = XSYMBOL (val); |
636b7260 | 2409 | p->name = XSTRING (name); |
47d5b31e | 2410 | p->obarray = Qnil; |
7146af97 | 2411 | p->plist = Qnil; |
2e471eb5 GM |
2412 | p->value = Qunbound; |
2413 | p->function = Qunbound; | |
2414 | p->next = 0; | |
2415 | consing_since_gc += sizeof (struct Lisp_Symbol); | |
2416 | symbols_consed++; | |
7146af97 JB |
2417 | return val; |
2418 | } | |
2419 | ||
3f25e183 | 2420 | |
2e471eb5 GM |
2421 | \f |
2422 | /*********************************************************************** | |
34400008 | 2423 | Marker (Misc) Allocation |
2e471eb5 | 2424 | ***********************************************************************/ |
3f25e183 | 2425 | |
2e471eb5 GM |
2426 | /* Allocation of markers and other objects that share that structure. |
2427 | Works like allocation of conses. */ | |
c0696668 | 2428 | |
2e471eb5 GM |
2429 | #define MARKER_BLOCK_SIZE \ |
2430 | ((1020 - sizeof (struct marker_block *)) / sizeof (union Lisp_Misc)) | |
2431 | ||
2432 | struct marker_block | |
c0696668 | 2433 | { |
2e471eb5 GM |
2434 | struct marker_block *next; |
2435 | union Lisp_Misc markers[MARKER_BLOCK_SIZE]; | |
2436 | }; | |
c0696668 | 2437 | |
2e471eb5 GM |
2438 | struct marker_block *marker_block; |
2439 | int marker_block_index; | |
c0696668 | 2440 | |
2e471eb5 | 2441 | union Lisp_Misc *marker_free_list; |
c0696668 | 2442 | |
2e471eb5 | 2443 | /* Total number of marker blocks now in use. */ |
3f25e183 | 2444 | |
2e471eb5 GM |
2445 | int n_marker_blocks; |
2446 | ||
2447 | void | |
2448 | init_marker () | |
3f25e183 | 2449 | { |
34400008 GM |
2450 | marker_block = (struct marker_block *) lisp_malloc (sizeof *marker_block, |
2451 | MEM_TYPE_MISC); | |
2e471eb5 GM |
2452 | marker_block->next = 0; |
2453 | bzero ((char *) marker_block->markers, sizeof marker_block->markers); | |
2454 | marker_block_index = 0; | |
2455 | marker_free_list = 0; | |
2456 | n_marker_blocks = 1; | |
3f25e183 RS |
2457 | } |
2458 | ||
2e471eb5 GM |
2459 | /* Return a newly allocated Lisp_Misc object, with no substructure. */ |
2460 | ||
3f25e183 | 2461 | Lisp_Object |
2e471eb5 | 2462 | allocate_misc () |
7146af97 | 2463 | { |
2e471eb5 | 2464 | Lisp_Object val; |
7146af97 | 2465 | |
2e471eb5 | 2466 | if (marker_free_list) |
7146af97 | 2467 | { |
2e471eb5 GM |
2468 | XSETMISC (val, marker_free_list); |
2469 | marker_free_list = marker_free_list->u_free.chain; | |
7146af97 JB |
2470 | } |
2471 | else | |
7146af97 | 2472 | { |
2e471eb5 GM |
2473 | if (marker_block_index == MARKER_BLOCK_SIZE) |
2474 | { | |
2475 | struct marker_block *new; | |
34400008 GM |
2476 | new = (struct marker_block *) lisp_malloc (sizeof *new, |
2477 | MEM_TYPE_MISC); | |
2e471eb5 GM |
2478 | VALIDATE_LISP_STORAGE (new, sizeof *new); |
2479 | new->next = marker_block; | |
2480 | marker_block = new; | |
2481 | marker_block_index = 0; | |
2482 | n_marker_blocks++; | |
2483 | } | |
2484 | XSETMISC (val, &marker_block->markers[marker_block_index++]); | |
7146af97 | 2485 | } |
2e471eb5 GM |
2486 | |
2487 | consing_since_gc += sizeof (union Lisp_Misc); | |
2488 | misc_objects_consed++; | |
2489 | return val; | |
2490 | } | |
2491 | ||
2492 | DEFUN ("make-marker", Fmake_marker, Smake_marker, 0, 0, 0, | |
2493 | "Return a newly allocated marker which does not point at any place.") | |
2494 | () | |
2495 | { | |
2496 | register Lisp_Object val; | |
2497 | register struct Lisp_Marker *p; | |
7146af97 | 2498 | |
2e471eb5 GM |
2499 | val = allocate_misc (); |
2500 | XMISCTYPE (val) = Lisp_Misc_Marker; | |
2501 | p = XMARKER (val); | |
2502 | p->buffer = 0; | |
2503 | p->bytepos = 0; | |
2504 | p->charpos = 0; | |
2505 | p->chain = Qnil; | |
2506 | p->insertion_type = 0; | |
7146af97 JB |
2507 | return val; |
2508 | } | |
2e471eb5 GM |
2509 | |
2510 | /* Put MARKER back on the free list after using it temporarily. */ | |
2511 | ||
2512 | void | |
2513 | free_marker (marker) | |
2514 | Lisp_Object marker; | |
2515 | { | |
2516 | unchain_marker (marker); | |
2517 | ||
2518 | XMISC (marker)->u_marker.type = Lisp_Misc_Free; | |
2519 | XMISC (marker)->u_free.chain = marker_free_list; | |
2520 | marker_free_list = XMISC (marker); | |
2521 | ||
2522 | total_free_markers++; | |
2523 | } | |
2524 | ||
c0696668 | 2525 | \f |
7146af97 | 2526 | /* Return a newly created vector or string with specified arguments as |
736471d1 RS |
2527 | elements. If all the arguments are characters that can fit |
2528 | in a string of events, make a string; otherwise, make a vector. | |
2529 | ||
2530 | Any number of arguments, even zero arguments, are allowed. */ | |
7146af97 JB |
2531 | |
2532 | Lisp_Object | |
736471d1 | 2533 | make_event_array (nargs, args) |
7146af97 JB |
2534 | register int nargs; |
2535 | Lisp_Object *args; | |
2536 | { | |
2537 | int i; | |
2538 | ||
2539 | for (i = 0; i < nargs; i++) | |
736471d1 | 2540 | /* The things that fit in a string |
c9ca4659 RS |
2541 | are characters that are in 0...127, |
2542 | after discarding the meta bit and all the bits above it. */ | |
e687453f | 2543 | if (!INTEGERP (args[i]) |
c9ca4659 | 2544 | || (XUINT (args[i]) & ~(-CHAR_META)) >= 0200) |
7146af97 JB |
2545 | return Fvector (nargs, args); |
2546 | ||
2547 | /* Since the loop exited, we know that all the things in it are | |
2548 | characters, so we can make a string. */ | |
2549 | { | |
c13ccad2 | 2550 | Lisp_Object result; |
7146af97 | 2551 | |
50aee051 | 2552 | result = Fmake_string (make_number (nargs), make_number (0)); |
7146af97 | 2553 | for (i = 0; i < nargs; i++) |
736471d1 RS |
2554 | { |
2555 | XSTRING (result)->data[i] = XINT (args[i]); | |
2556 | /* Move the meta bit to the right place for a string char. */ | |
2557 | if (XINT (args[i]) & CHAR_META) | |
2558 | XSTRING (result)->data[i] |= 0x80; | |
2559 | } | |
7146af97 JB |
2560 | |
2561 | return result; | |
2562 | } | |
2563 | } | |
2e471eb5 GM |
2564 | |
2565 | ||
7146af97 | 2566 | \f |
34400008 GM |
2567 | /************************************************************************ |
2568 | C Stack Marking | |
2569 | ************************************************************************/ | |
2570 | ||
13c844fb GM |
2571 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
2572 | ||
34400008 GM |
2573 | /* Initialize this part of alloc.c. */ |
2574 | ||
2575 | static void | |
2576 | mem_init () | |
2577 | { | |
2578 | mem_z.left = mem_z.right = MEM_NIL; | |
2579 | mem_z.parent = NULL; | |
2580 | mem_z.color = MEM_BLACK; | |
2581 | mem_z.start = mem_z.end = NULL; | |
2582 | mem_root = MEM_NIL; | |
2583 | } | |
2584 | ||
2585 | ||
2586 | /* Value is a pointer to the mem_node containing START. Value is | |
2587 | MEM_NIL if there is no node in the tree containing START. */ | |
2588 | ||
2589 | static INLINE struct mem_node * | |
2590 | mem_find (start) | |
2591 | void *start; | |
2592 | { | |
2593 | struct mem_node *p; | |
2594 | ||
2595 | /* Make the search always successful to speed up the loop below. */ | |
2596 | mem_z.start = start; | |
2597 | mem_z.end = (char *) start + 1; | |
2598 | ||
2599 | p = mem_root; | |
2600 | while (start < p->start || start >= p->end) | |
2601 | p = start < p->start ? p->left : p->right; | |
2602 | return p; | |
2603 | } | |
2604 | ||
2605 | ||
2606 | /* Insert a new node into the tree for a block of memory with start | |
2607 | address START, end address END, and type TYPE. Value is a | |
2608 | pointer to the node that was inserted. */ | |
2609 | ||
2610 | static struct mem_node * | |
2611 | mem_insert (start, end, type) | |
2612 | void *start, *end; | |
2613 | enum mem_type type; | |
2614 | { | |
2615 | struct mem_node *c, *parent, *x; | |
2616 | ||
2617 | /* See where in the tree a node for START belongs. In this | |
2618 | particular application, it shouldn't happen that a node is already | |
2619 | present. For debugging purposes, let's check that. */ | |
2620 | c = mem_root; | |
2621 | parent = NULL; | |
2622 | ||
2623 | #if GC_MARK_STACK != GC_MAKE_GCPROS_NOOPS | |
2624 | ||
2625 | while (c != MEM_NIL) | |
2626 | { | |
2627 | if (start >= c->start && start < c->end) | |
2628 | abort (); | |
2629 | parent = c; | |
2630 | c = start < c->start ? c->left : c->right; | |
2631 | } | |
2632 | ||
2633 | #else /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ | |
2634 | ||
2635 | while (c != MEM_NIL) | |
2636 | { | |
2637 | parent = c; | |
2638 | c = start < c->start ? c->left : c->right; | |
2639 | } | |
2640 | ||
2641 | #endif /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ | |
2642 | ||
2643 | /* Create a new node. */ | |
877935b1 GM |
2644 | #ifdef GC_MALLOC_CHECK |
2645 | x = (struct mem_node *) _malloc_internal (sizeof *x); | |
2646 | if (x == NULL) | |
2647 | abort (); | |
2648 | #else | |
34400008 | 2649 | x = (struct mem_node *) xmalloc (sizeof *x); |
877935b1 | 2650 | #endif |
34400008 GM |
2651 | x->start = start; |
2652 | x->end = end; | |
2653 | x->type = type; | |
2654 | x->parent = parent; | |
2655 | x->left = x->right = MEM_NIL; | |
2656 | x->color = MEM_RED; | |
2657 | ||
2658 | /* Insert it as child of PARENT or install it as root. */ | |
2659 | if (parent) | |
2660 | { | |
2661 | if (start < parent->start) | |
2662 | parent->left = x; | |
2663 | else | |
2664 | parent->right = x; | |
2665 | } | |
2666 | else | |
2667 | mem_root = x; | |
2668 | ||
2669 | /* Re-establish red-black tree properties. */ | |
2670 | mem_insert_fixup (x); | |
877935b1 | 2671 | |
34400008 GM |
2672 | return x; |
2673 | } | |
2674 | ||
2675 | ||
2676 | /* Re-establish the red-black properties of the tree, and thereby | |
2677 | balance the tree, after node X has been inserted; X is always red. */ | |
2678 | ||
2679 | static void | |
2680 | mem_insert_fixup (x) | |
2681 | struct mem_node *x; | |
2682 | { | |
2683 | while (x != mem_root && x->parent->color == MEM_RED) | |
2684 | { | |
2685 | /* X is red and its parent is red. This is a violation of | |
2686 | red-black tree property #3. */ | |
2687 | ||
2688 | if (x->parent == x->parent->parent->left) | |
2689 | { | |
2690 | /* We're on the left side of our grandparent, and Y is our | |
2691 | "uncle". */ | |
2692 | struct mem_node *y = x->parent->parent->right; | |
2693 | ||
2694 | if (y->color == MEM_RED) | |
2695 | { | |
2696 | /* Uncle and parent are red but should be black because | |
2697 | X is red. Change the colors accordingly and proceed | |
2698 | with the grandparent. */ | |
2699 | x->parent->color = MEM_BLACK; | |
2700 | y->color = MEM_BLACK; | |
2701 | x->parent->parent->color = MEM_RED; | |
2702 | x = x->parent->parent; | |
2703 | } | |
2704 | else | |
2705 | { | |
2706 | /* Parent and uncle have different colors; parent is | |
2707 | red, uncle is black. */ | |
2708 | if (x == x->parent->right) | |
2709 | { | |
2710 | x = x->parent; | |
2711 | mem_rotate_left (x); | |
2712 | } | |
2713 | ||
2714 | x->parent->color = MEM_BLACK; | |
2715 | x->parent->parent->color = MEM_RED; | |
2716 | mem_rotate_right (x->parent->parent); | |
2717 | } | |
2718 | } | |
2719 | else | |
2720 | { | |
2721 | /* This is the symmetrical case of above. */ | |
2722 | struct mem_node *y = x->parent->parent->left; | |
2723 | ||
2724 | if (y->color == MEM_RED) | |
2725 | { | |
2726 | x->parent->color = MEM_BLACK; | |
2727 | y->color = MEM_BLACK; | |
2728 | x->parent->parent->color = MEM_RED; | |
2729 | x = x->parent->parent; | |
2730 | } | |
2731 | else | |
2732 | { | |
2733 | if (x == x->parent->left) | |
2734 | { | |
2735 | x = x->parent; | |
2736 | mem_rotate_right (x); | |
2737 | } | |
2738 | ||
2739 | x->parent->color = MEM_BLACK; | |
2740 | x->parent->parent->color = MEM_RED; | |
2741 | mem_rotate_left (x->parent->parent); | |
2742 | } | |
2743 | } | |
2744 | } | |
2745 | ||
2746 | /* The root may have been changed to red due to the algorithm. Set | |
2747 | it to black so that property #5 is satisfied. */ | |
2748 | mem_root->color = MEM_BLACK; | |
2749 | } | |
2750 | ||
2751 | ||
2752 | /* (x) (y) | |
2753 | / \ / \ | |
2754 | a (y) ===> (x) c | |
2755 | / \ / \ | |
2756 | b c a b */ | |
2757 | ||
2758 | static void | |
2759 | mem_rotate_left (x) | |
2760 | struct mem_node *x; | |
2761 | { | |
2762 | struct mem_node *y; | |
2763 | ||
2764 | /* Turn y's left sub-tree into x's right sub-tree. */ | |
2765 | y = x->right; | |
2766 | x->right = y->left; | |
2767 | if (y->left != MEM_NIL) | |
2768 | y->left->parent = x; | |
2769 | ||
2770 | /* Y's parent was x's parent. */ | |
2771 | if (y != MEM_NIL) | |
2772 | y->parent = x->parent; | |
2773 | ||
2774 | /* Get the parent to point to y instead of x. */ | |
2775 | if (x->parent) | |
2776 | { | |
2777 | if (x == x->parent->left) | |
2778 | x->parent->left = y; | |
2779 | else | |
2780 | x->parent->right = y; | |
2781 | } | |
2782 | else | |
2783 | mem_root = y; | |
2784 | ||
2785 | /* Put x on y's left. */ | |
2786 | y->left = x; | |
2787 | if (x != MEM_NIL) | |
2788 | x->parent = y; | |
2789 | } | |
2790 | ||
2791 | ||
2792 | /* (x) (Y) | |
2793 | / \ / \ | |
2794 | (y) c ===> a (x) | |
2795 | / \ / \ | |
2796 | a b b c */ | |
2797 | ||
2798 | static void | |
2799 | mem_rotate_right (x) | |
2800 | struct mem_node *x; | |
2801 | { | |
2802 | struct mem_node *y = x->left; | |
2803 | ||
2804 | x->left = y->right; | |
2805 | if (y->right != MEM_NIL) | |
2806 | y->right->parent = x; | |
2807 | ||
2808 | if (y != MEM_NIL) | |
2809 | y->parent = x->parent; | |
2810 | if (x->parent) | |
2811 | { | |
2812 | if (x == x->parent->right) | |
2813 | x->parent->right = y; | |
2814 | else | |
2815 | x->parent->left = y; | |
2816 | } | |
2817 | else | |
2818 | mem_root = y; | |
2819 | ||
2820 | y->right = x; | |
2821 | if (x != MEM_NIL) | |
2822 | x->parent = y; | |
2823 | } | |
2824 | ||
2825 | ||
2826 | /* Delete node Z from the tree. If Z is null or MEM_NIL, do nothing. */ | |
2827 | ||
2828 | static void | |
2829 | mem_delete (z) | |
2830 | struct mem_node *z; | |
2831 | { | |
2832 | struct mem_node *x, *y; | |
2833 | ||
2834 | if (!z || z == MEM_NIL) | |
2835 | return; | |
2836 | ||
2837 | if (z->left == MEM_NIL || z->right == MEM_NIL) | |
2838 | y = z; | |
2839 | else | |
2840 | { | |
2841 | y = z->right; | |
2842 | while (y->left != MEM_NIL) | |
2843 | y = y->left; | |
2844 | } | |
2845 | ||
2846 | if (y->left != MEM_NIL) | |
2847 | x = y->left; | |
2848 | else | |
2849 | x = y->right; | |
2850 | ||
2851 | x->parent = y->parent; | |
2852 | if (y->parent) | |
2853 | { | |
2854 | if (y == y->parent->left) | |
2855 | y->parent->left = x; | |
2856 | else | |
2857 | y->parent->right = x; | |
2858 | } | |
2859 | else | |
2860 | mem_root = x; | |
2861 | ||
2862 | if (y != z) | |
2863 | { | |
2864 | z->start = y->start; | |
2865 | z->end = y->end; | |
2866 | z->type = y->type; | |
2867 | } | |
2868 | ||
2869 | if (y->color == MEM_BLACK) | |
2870 | mem_delete_fixup (x); | |
877935b1 GM |
2871 | |
2872 | #ifdef GC_MALLOC_CHECK | |
2873 | _free_internal (y); | |
2874 | #else | |
34400008 | 2875 | xfree (y); |
877935b1 | 2876 | #endif |
34400008 GM |
2877 | } |
2878 | ||
2879 | ||
2880 | /* Re-establish the red-black properties of the tree, after a | |
2881 | deletion. */ | |
2882 | ||
2883 | static void | |
2884 | mem_delete_fixup (x) | |
2885 | struct mem_node *x; | |
2886 | { | |
2887 | while (x != mem_root && x->color == MEM_BLACK) | |
2888 | { | |
2889 | if (x == x->parent->left) | |
2890 | { | |
2891 | struct mem_node *w = x->parent->right; | |
2892 | ||
2893 | if (w->color == MEM_RED) | |
2894 | { | |
2895 | w->color = MEM_BLACK; | |
2896 | x->parent->color = MEM_RED; | |
2897 | mem_rotate_left (x->parent); | |
2898 | w = x->parent->right; | |
2899 | } | |
2900 | ||
2901 | if (w->left->color == MEM_BLACK && w->right->color == MEM_BLACK) | |
2902 | { | |
2903 | w->color = MEM_RED; | |
2904 | x = x->parent; | |
2905 | } | |
2906 | else | |
2907 | { | |
2908 | if (w->right->color == MEM_BLACK) | |
2909 | { | |
2910 | w->left->color = MEM_BLACK; | |
2911 | w->color = MEM_RED; | |
2912 | mem_rotate_right (w); | |
2913 | w = x->parent->right; | |
2914 | } | |
2915 | w->color = x->parent->color; | |
2916 | x->parent->color = MEM_BLACK; | |
2917 | w->right->color = MEM_BLACK; | |
2918 | mem_rotate_left (x->parent); | |
2919 | x = mem_root; | |
2920 | } | |
2921 | } | |
2922 | else | |
2923 | { | |
2924 | struct mem_node *w = x->parent->left; | |
2925 | ||
2926 | if (w->color == MEM_RED) | |
2927 | { | |
2928 | w->color = MEM_BLACK; | |
2929 | x->parent->color = MEM_RED; | |
2930 | mem_rotate_right (x->parent); | |
2931 | w = x->parent->left; | |
2932 | } | |
2933 | ||
2934 | if (w->right->color == MEM_BLACK && w->left->color == MEM_BLACK) | |
2935 | { | |
2936 | w->color = MEM_RED; | |
2937 | x = x->parent; | |
2938 | } | |
2939 | else | |
2940 | { | |
2941 | if (w->left->color == MEM_BLACK) | |
2942 | { | |
2943 | w->right->color = MEM_BLACK; | |
2944 | w->color = MEM_RED; | |
2945 | mem_rotate_left (w); | |
2946 | w = x->parent->left; | |
2947 | } | |
2948 | ||
2949 | w->color = x->parent->color; | |
2950 | x->parent->color = MEM_BLACK; | |
2951 | w->left->color = MEM_BLACK; | |
2952 | mem_rotate_right (x->parent); | |
2953 | x = mem_root; | |
2954 | } | |
2955 | } | |
2956 | } | |
2957 | ||
2958 | x->color = MEM_BLACK; | |
2959 | } | |
2960 | ||
2961 | ||
2962 | /* Value is non-zero if P is a pointer to a live Lisp string on | |
2963 | the heap. M is a pointer to the mem_block for P. */ | |
2964 | ||
2965 | static INLINE int | |
2966 | live_string_p (m, p) | |
2967 | struct mem_node *m; | |
2968 | void *p; | |
2969 | { | |
2970 | if (m->type == MEM_TYPE_STRING) | |
2971 | { | |
2972 | struct string_block *b = (struct string_block *) m->start; | |
2973 | int offset = (char *) p - (char *) &b->strings[0]; | |
2974 | ||
2975 | /* P must point to the start of a Lisp_String structure, and it | |
2976 | must not be on the free-list. */ | |
2977 | return (offset % sizeof b->strings[0] == 0 | |
2978 | && ((struct Lisp_String *) p)->data != NULL); | |
2979 | } | |
2980 | else | |
2981 | return 0; | |
2982 | } | |
2983 | ||
2984 | ||
2985 | /* Value is non-zero if P is a pointer to a live Lisp cons on | |
2986 | the heap. M is a pointer to the mem_block for P. */ | |
2987 | ||
2988 | static INLINE int | |
2989 | live_cons_p (m, p) | |
2990 | struct mem_node *m; | |
2991 | void *p; | |
2992 | { | |
2993 | if (m->type == MEM_TYPE_CONS) | |
2994 | { | |
2995 | struct cons_block *b = (struct cons_block *) m->start; | |
2996 | int offset = (char *) p - (char *) &b->conses[0]; | |
2997 | ||
2998 | /* P must point to the start of a Lisp_Cons, not be | |
2999 | one of the unused cells in the current cons block, | |
3000 | and not be on the free-list. */ | |
3001 | return (offset % sizeof b->conses[0] == 0 | |
3002 | && (b != cons_block | |
3003 | || offset / sizeof b->conses[0] < cons_block_index) | |
3004 | && !EQ (((struct Lisp_Cons *) p)->car, Vdead)); | |
3005 | } | |
3006 | else | |
3007 | return 0; | |
3008 | } | |
3009 | ||
3010 | ||
3011 | /* Value is non-zero if P is a pointer to a live Lisp symbol on | |
3012 | the heap. M is a pointer to the mem_block for P. */ | |
3013 | ||
3014 | static INLINE int | |
3015 | live_symbol_p (m, p) | |
3016 | struct mem_node *m; | |
3017 | void *p; | |
3018 | { | |
3019 | if (m->type == MEM_TYPE_SYMBOL) | |
3020 | { | |
3021 | struct symbol_block *b = (struct symbol_block *) m->start; | |
3022 | int offset = (char *) p - (char *) &b->symbols[0]; | |
3023 | ||
3024 | /* P must point to the start of a Lisp_Symbol, not be | |
3025 | one of the unused cells in the current symbol block, | |
3026 | and not be on the free-list. */ | |
3027 | return (offset % sizeof b->symbols[0] == 0 | |
3028 | && (b != symbol_block | |
3029 | || offset / sizeof b->symbols[0] < symbol_block_index) | |
3030 | && !EQ (((struct Lisp_Symbol *) p)->function, Vdead)); | |
3031 | } | |
3032 | else | |
3033 | return 0; | |
3034 | } | |
3035 | ||
3036 | ||
3037 | /* Value is non-zero if P is a pointer to a live Lisp float on | |
3038 | the heap. M is a pointer to the mem_block for P. */ | |
3039 | ||
3040 | static INLINE int | |
3041 | live_float_p (m, p) | |
3042 | struct mem_node *m; | |
3043 | void *p; | |
3044 | { | |
3045 | if (m->type == MEM_TYPE_FLOAT) | |
3046 | { | |
3047 | struct float_block *b = (struct float_block *) m->start; | |
3048 | int offset = (char *) p - (char *) &b->floats[0]; | |
3049 | ||
3050 | /* P must point to the start of a Lisp_Float, not be | |
3051 | one of the unused cells in the current float block, | |
3052 | and not be on the free-list. */ | |
3053 | return (offset % sizeof b->floats[0] == 0 | |
3054 | && (b != float_block | |
3055 | || offset / sizeof b->floats[0] < float_block_index) | |
3056 | && !EQ (((struct Lisp_Float *) p)->type, Vdead)); | |
3057 | } | |
3058 | else | |
3059 | return 0; | |
3060 | } | |
3061 | ||
3062 | ||
3063 | /* Value is non-zero if P is a pointer to a live Lisp Misc on | |
3064 | the heap. M is a pointer to the mem_block for P. */ | |
3065 | ||
3066 | static INLINE int | |
3067 | live_misc_p (m, p) | |
3068 | struct mem_node *m; | |
3069 | void *p; | |
3070 | { | |
3071 | if (m->type == MEM_TYPE_MISC) | |
3072 | { | |
3073 | struct marker_block *b = (struct marker_block *) m->start; | |
3074 | int offset = (char *) p - (char *) &b->markers[0]; | |
3075 | ||
3076 | /* P must point to the start of a Lisp_Misc, not be | |
3077 | one of the unused cells in the current misc block, | |
3078 | and not be on the free-list. */ | |
3079 | return (offset % sizeof b->markers[0] == 0 | |
3080 | && (b != marker_block | |
3081 | || offset / sizeof b->markers[0] < marker_block_index) | |
3082 | && ((union Lisp_Misc *) p)->u_marker.type != Lisp_Misc_Free); | |
3083 | } | |
3084 | else | |
3085 | return 0; | |
3086 | } | |
3087 | ||
3088 | ||
3089 | /* Value is non-zero if P is a pointer to a live vector-like object. | |
3090 | M is a pointer to the mem_block for P. */ | |
3091 | ||
3092 | static INLINE int | |
3093 | live_vector_p (m, p) | |
3094 | struct mem_node *m; | |
3095 | void *p; | |
3096 | { | |
3097 | return m->type == MEM_TYPE_VECTOR && p == m->start; | |
3098 | } | |
3099 | ||
3100 | ||
3101 | /* Value is non-zero of P is a pointer to a live buffer. M is a | |
3102 | pointer to the mem_block for P. */ | |
3103 | ||
3104 | static INLINE int | |
3105 | live_buffer_p (m, p) | |
3106 | struct mem_node *m; | |
3107 | void *p; | |
3108 | { | |
3109 | /* P must point to the start of the block, and the buffer | |
3110 | must not have been killed. */ | |
3111 | return (m->type == MEM_TYPE_BUFFER | |
3112 | && p == m->start | |
3113 | && !NILP (((struct buffer *) p)->name)); | |
3114 | } | |
3115 | ||
13c844fb GM |
3116 | #endif /* GC_MARK_STACK || defined GC_MALLOC_CHECK */ |
3117 | ||
3118 | #if GC_MARK_STACK | |
3119 | ||
34400008 GM |
3120 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
3121 | ||
3122 | /* Array of objects that are kept alive because the C stack contains | |
3123 | a pattern that looks like a reference to them . */ | |
3124 | ||
3125 | #define MAX_ZOMBIES 10 | |
3126 | static Lisp_Object zombies[MAX_ZOMBIES]; | |
3127 | ||
3128 | /* Number of zombie objects. */ | |
3129 | ||
3130 | static int nzombies; | |
3131 | ||
3132 | /* Number of garbage collections. */ | |
3133 | ||
3134 | static int ngcs; | |
3135 | ||
3136 | /* Average percentage of zombies per collection. */ | |
3137 | ||
3138 | static double avg_zombies; | |
3139 | ||
3140 | /* Max. number of live and zombie objects. */ | |
3141 | ||
3142 | static int max_live, max_zombies; | |
3143 | ||
3144 | /* Average number of live objects per GC. */ | |
3145 | ||
3146 | static double avg_live; | |
3147 | ||
3148 | DEFUN ("gc-status", Fgc_status, Sgc_status, 0, 0, "", | |
3149 | "Show information about live and zombie objects.") | |
3150 | () | |
3151 | { | |
3152 | Lisp_Object args[7]; | |
3153 | args[0] = build_string ("%d GCs, avg live/zombies = %.2f/%.2f (%f%%), max %d/%d"); | |
3154 | args[1] = make_number (ngcs); | |
3155 | args[2] = make_float (avg_live); | |
3156 | args[3] = make_float (avg_zombies); | |
3157 | args[4] = make_float (avg_zombies / avg_live / 100); | |
3158 | args[5] = make_number (max_live); | |
3159 | args[6] = make_number (max_zombies); | |
3160 | return Fmessage (7, args); | |
3161 | } | |
3162 | ||
3163 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
3164 | ||
3165 | ||
182ff242 GM |
3166 | /* Mark OBJ if we can prove it's a Lisp_Object. */ |
3167 | ||
3168 | static INLINE void | |
3169 | mark_maybe_object (obj) | |
3170 | Lisp_Object obj; | |
3171 | { | |
3172 | void *po = (void *) XPNTR (obj); | |
3173 | struct mem_node *m = mem_find (po); | |
3174 | ||
3175 | if (m != MEM_NIL) | |
3176 | { | |
3177 | int mark_p = 0; | |
3178 | ||
3179 | switch (XGCTYPE (obj)) | |
3180 | { | |
3181 | case Lisp_String: | |
3182 | mark_p = (live_string_p (m, po) | |
3183 | && !STRING_MARKED_P ((struct Lisp_String *) po)); | |
3184 | break; | |
3185 | ||
3186 | case Lisp_Cons: | |
3187 | mark_p = (live_cons_p (m, po) | |
3188 | && !XMARKBIT (XCONS (obj)->car)); | |
3189 | break; | |
3190 | ||
3191 | case Lisp_Symbol: | |
3192 | mark_p = (live_symbol_p (m, po) | |
3193 | && !XMARKBIT (XSYMBOL (obj)->plist)); | |
3194 | break; | |
3195 | ||
3196 | case Lisp_Float: | |
3197 | mark_p = (live_float_p (m, po) | |
3198 | && !XMARKBIT (XFLOAT (obj)->type)); | |
3199 | break; | |
3200 | ||
3201 | case Lisp_Vectorlike: | |
3202 | /* Note: can't check GC_BUFFERP before we know it's a | |
3203 | buffer because checking that dereferences the pointer | |
3204 | PO which might point anywhere. */ | |
3205 | if (live_vector_p (m, po)) | |
3206 | mark_p = (!GC_SUBRP (obj) | |
3207 | && !(XVECTOR (obj)->size & ARRAY_MARK_FLAG)); | |
3208 | else if (live_buffer_p (m, po)) | |
3209 | mark_p = GC_BUFFERP (obj) && !XMARKBIT (XBUFFER (obj)->name); | |
3210 | break; | |
3211 | ||
3212 | case Lisp_Misc: | |
3213 | if (live_misc_p (m, po)) | |
3214 | { | |
3215 | switch (XMISCTYPE (obj)) | |
3216 | { | |
3217 | case Lisp_Misc_Marker: | |
3218 | mark_p = !XMARKBIT (XMARKER (obj)->chain); | |
3219 | break; | |
3220 | ||
3221 | case Lisp_Misc_Buffer_Local_Value: | |
3222 | case Lisp_Misc_Some_Buffer_Local_Value: | |
3223 | mark_p = !XMARKBIT (XBUFFER_LOCAL_VALUE (obj)->realvalue); | |
3224 | break; | |
3225 | ||
3226 | case Lisp_Misc_Overlay: | |
3227 | mark_p = !XMARKBIT (XOVERLAY (obj)->plist); | |
3228 | break; | |
3229 | } | |
3230 | } | |
3231 | break; | |
6bbd7a29 GM |
3232 | |
3233 | case Lisp_Int: | |
31d929e5 | 3234 | case Lisp_Type_Limit: |
6bbd7a29 | 3235 | break; |
182ff242 GM |
3236 | } |
3237 | ||
3238 | if (mark_p) | |
3239 | { | |
3240 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
3241 | if (nzombies < MAX_ZOMBIES) | |
3242 | zombies[nzombies] = *p; | |
3243 | ++nzombies; | |
3244 | #endif | |
3245 | mark_object (&obj); | |
3246 | } | |
3247 | } | |
3248 | } | |
3249 | ||
34400008 GM |
3250 | /* Mark Lisp objects in the address range START..END. */ |
3251 | ||
3252 | static void | |
3253 | mark_memory (start, end) | |
3254 | void *start, *end; | |
3255 | { | |
3256 | Lisp_Object *p; | |
3257 | ||
3258 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
3259 | nzombies = 0; | |
3260 | #endif | |
3261 | ||
3262 | /* Make START the pointer to the start of the memory region, | |
3263 | if it isn't already. */ | |
3264 | if (end < start) | |
3265 | { | |
3266 | void *tem = start; | |
3267 | start = end; | |
3268 | end = tem; | |
3269 | } | |
182ff242 | 3270 | |
34400008 | 3271 | for (p = (Lisp_Object *) start; (void *) p < end; ++p) |
182ff242 GM |
3272 | mark_maybe_object (*p); |
3273 | } | |
3274 | ||
3275 | ||
3276 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
3277 | ||
3278 | static int setjmp_tested_p, longjmps_done; | |
3279 | ||
3280 | #define SETJMP_WILL_LIKELY_WORK "\ | |
3281 | \n\ | |
3282 | Emacs garbage collector has been changed to use conservative stack\n\ | |
3283 | marking. Emacs has determined that the method it uses to do the\n\ | |
3284 | marking will likely work on your system, but this isn't sure.\n\ | |
3285 | \n\ | |
3286 | If you are a system-programmer, or can get the help of a local wizard\n\ | |
3287 | who is, please take a look at the function mark_stack in alloc.c, and\n\ | |
3288 | verify that the methods used are appropriate for your system.\n\ | |
3289 | \n\ | |
3290 | Please mail the result to <gerd@gnu.org>.\n\ | |
3291 | " | |
3292 | ||
3293 | #define SETJMP_WILL_NOT_WORK "\ | |
3294 | \n\ | |
3295 | Emacs garbage collector has been changed to use conservative stack\n\ | |
3296 | marking. Emacs has determined that the default method it uses to do the\n\ | |
3297 | marking will not work on your system. We will need a system-dependent\n\ | |
3298 | solution for your system.\n\ | |
3299 | \n\ | |
3300 | Please take a look at the function mark_stack in alloc.c, and\n\ | |
3301 | try to find a way to make it work on your system.\n\ | |
3302 | Please mail the result to <gerd@gnu.org>.\n\ | |
3303 | " | |
3304 | ||
3305 | ||
3306 | /* Perform a quick check if it looks like setjmp saves registers in a | |
3307 | jmp_buf. Print a message to stderr saying so. When this test | |
3308 | succeeds, this is _not_ a proof that setjmp is sufficient for | |
3309 | conservative stack marking. Only the sources or a disassembly | |
3310 | can prove that. */ | |
3311 | ||
3312 | static void | |
3313 | test_setjmp () | |
3314 | { | |
3315 | char buf[10]; | |
3316 | register int x; | |
3317 | jmp_buf jbuf; | |
3318 | int result = 0; | |
3319 | ||
3320 | /* Arrange for X to be put in a register. */ | |
3321 | sprintf (buf, "1"); | |
3322 | x = strlen (buf); | |
3323 | x = 2 * x - 1; | |
3324 | ||
3325 | setjmp (jbuf); | |
3326 | if (longjmps_done == 1) | |
34400008 | 3327 | { |
182ff242 | 3328 | /* Came here after the longjmp at the end of the function. |
34400008 | 3329 | |
182ff242 GM |
3330 | If x == 1, the longjmp has restored the register to its |
3331 | value before the setjmp, and we can hope that setjmp | |
3332 | saves all such registers in the jmp_buf, although that | |
3333 | isn't sure. | |
34400008 | 3334 | |
182ff242 GM |
3335 | For other values of X, either something really strange is |
3336 | taking place, or the setjmp just didn't save the register. */ | |
3337 | ||
3338 | if (x == 1) | |
3339 | fprintf (stderr, SETJMP_WILL_LIKELY_WORK); | |
3340 | else | |
3341 | { | |
3342 | fprintf (stderr, SETJMP_WILL_NOT_WORK); | |
3343 | exit (1); | |
34400008 GM |
3344 | } |
3345 | } | |
182ff242 GM |
3346 | |
3347 | ++longjmps_done; | |
3348 | x = 2; | |
3349 | if (longjmps_done == 1) | |
3350 | longjmp (jbuf, 1); | |
34400008 GM |
3351 | } |
3352 | ||
182ff242 GM |
3353 | #endif /* not GC_SAVE_REGISTERS_ON_STACK && not GC_SETJMP_WORKS */ |
3354 | ||
34400008 GM |
3355 | |
3356 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
3357 | ||
3358 | /* Abort if anything GCPRO'd doesn't survive the GC. */ | |
3359 | ||
3360 | static void | |
3361 | check_gcpros () | |
3362 | { | |
3363 | struct gcpro *p; | |
3364 | int i; | |
3365 | ||
3366 | for (p = gcprolist; p; p = p->next) | |
3367 | for (i = 0; i < p->nvars; ++i) | |
3368 | if (!survives_gc_p (p->var[i])) | |
3369 | abort (); | |
3370 | } | |
3371 | ||
3372 | #elif GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
3373 | ||
3374 | static void | |
3375 | dump_zombies () | |
3376 | { | |
3377 | int i; | |
3378 | ||
3379 | fprintf (stderr, "\nZombies kept alive = %d:\n", nzombies); | |
3380 | for (i = 0; i < min (MAX_ZOMBIES, nzombies); ++i) | |
3381 | { | |
3382 | fprintf (stderr, " %d = ", i); | |
3383 | debug_print (zombies[i]); | |
3384 | } | |
3385 | } | |
3386 | ||
3387 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
3388 | ||
3389 | ||
182ff242 GM |
3390 | /* Mark live Lisp objects on the C stack. |
3391 | ||
3392 | There are several system-dependent problems to consider when | |
3393 | porting this to new architectures: | |
3394 | ||
3395 | Processor Registers | |
3396 | ||
3397 | We have to mark Lisp objects in CPU registers that can hold local | |
3398 | variables or are used to pass parameters. | |
3399 | ||
3400 | If GC_SAVE_REGISTERS_ON_STACK is defined, it should expand to | |
3401 | something that either saves relevant registers on the stack, or | |
3402 | calls mark_maybe_object passing it each register's contents. | |
3403 | ||
3404 | If GC_SAVE_REGISTERS_ON_STACK is not defined, the current | |
3405 | implementation assumes that calling setjmp saves registers we need | |
3406 | to see in a jmp_buf which itself lies on the stack. This doesn't | |
3407 | have to be true! It must be verified for each system, possibly | |
3408 | by taking a look at the source code of setjmp. | |
3409 | ||
3410 | Stack Layout | |
3411 | ||
3412 | Architectures differ in the way their processor stack is organized. | |
3413 | For example, the stack might look like this | |
3414 | ||
3415 | +----------------+ | |
3416 | | Lisp_Object | size = 4 | |
3417 | +----------------+ | |
3418 | | something else | size = 2 | |
3419 | +----------------+ | |
3420 | | Lisp_Object | size = 4 | |
3421 | +----------------+ | |
3422 | | ... | | |
3423 | ||
3424 | In such a case, not every Lisp_Object will be aligned equally. To | |
3425 | find all Lisp_Object on the stack it won't be sufficient to walk | |
3426 | the stack in steps of 4 bytes. Instead, two passes will be | |
3427 | necessary, one starting at the start of the stack, and a second | |
3428 | pass starting at the start of the stack + 2. Likewise, if the | |
3429 | minimal alignment of Lisp_Objects on the stack is 1, four passes | |
3430 | would be necessary, each one starting with one byte more offset | |
3431 | from the stack start. | |
3432 | ||
3433 | The current code assumes by default that Lisp_Objects are aligned | |
3434 | equally on the stack. */ | |
34400008 GM |
3435 | |
3436 | static void | |
3437 | mark_stack () | |
3438 | { | |
3439 | jmp_buf j; | |
6bbd7a29 | 3440 | volatile int stack_grows_down_p = (char *) &j > (char *) stack_base; |
34400008 GM |
3441 | void *end; |
3442 | ||
3443 | /* This trick flushes the register windows so that all the state of | |
3444 | the process is contained in the stack. */ | |
3445 | #ifdef sparc | |
3446 | asm ("ta 3"); | |
3447 | #endif | |
3448 | ||
3449 | /* Save registers that we need to see on the stack. We need to see | |
3450 | registers used to hold register variables and registers used to | |
3451 | pass parameters. */ | |
3452 | #ifdef GC_SAVE_REGISTERS_ON_STACK | |
3453 | GC_SAVE_REGISTERS_ON_STACK (end); | |
182ff242 GM |
3454 | #else /* not GC_SAVE_REGISTERS_ON_STACK */ |
3455 | ||
3456 | #ifndef GC_SETJMP_WORKS /* If it hasn't been checked yet that | |
3457 | setjmp will definitely work, test it | |
3458 | and print a message with the result | |
3459 | of the test. */ | |
3460 | if (!setjmp_tested_p) | |
3461 | { | |
3462 | setjmp_tested_p = 1; | |
3463 | test_setjmp (); | |
3464 | } | |
3465 | #endif /* GC_SETJMP_WORKS */ | |
3466 | ||
34400008 GM |
3467 | setjmp (j); |
3468 | end = stack_grows_down_p ? (char *) &j + sizeof j : (char *) &j; | |
182ff242 | 3469 | #endif /* not GC_SAVE_REGISTERS_ON_STACK */ |
34400008 GM |
3470 | |
3471 | /* This assumes that the stack is a contiguous region in memory. If | |
182ff242 GM |
3472 | that's not the case, something has to be done here to iterate |
3473 | over the stack segments. */ | |
3474 | #if GC_LISP_OBJECT_ALIGNMENT == 1 | |
3475 | mark_memory (stack_base, end); | |
3476 | mark_memory ((char *) stack_base + 1, end); | |
3477 | mark_memory ((char *) stack_base + 2, end); | |
3478 | mark_memory ((char *) stack_base + 3, end); | |
3479 | #elif GC_LISP_OBJECT_ALIGNMENT == 2 | |
3480 | mark_memory (stack_base, end); | |
3481 | mark_memory ((char *) stack_base + 2, end); | |
3482 | #else | |
34400008 | 3483 | mark_memory (stack_base, end); |
182ff242 | 3484 | #endif |
34400008 GM |
3485 | |
3486 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
3487 | check_gcpros (); | |
3488 | #endif | |
3489 | } | |
3490 | ||
3491 | ||
3492 | #endif /* GC_MARK_STACK != 0 */ | |
3493 | ||
3494 | ||
3495 | \f | |
2e471eb5 GM |
3496 | /*********************************************************************** |
3497 | Pure Storage Management | |
3498 | ***********************************************************************/ | |
3499 | ||
1f0b3fd2 GM |
3500 | /* Allocate room for SIZE bytes from pure Lisp storage and return a |
3501 | pointer to it. TYPE is the Lisp type for which the memory is | |
3502 | allocated. TYPE < 0 means it's not used for a Lisp object. | |
3503 | ||
3504 | If store_pure_type_info is set and TYPE is >= 0, the type of | |
3505 | the allocated object is recorded in pure_types. */ | |
3506 | ||
3507 | static POINTER_TYPE * | |
3508 | pure_alloc (size, type) | |
3509 | size_t size; | |
3510 | int type; | |
3511 | { | |
3512 | size_t nbytes; | |
3513 | POINTER_TYPE *result; | |
3514 | char *beg = PUREBEG; | |
3515 | ||
3516 | /* Give Lisp_Floats an extra alignment. */ | |
3517 | if (type == Lisp_Float) | |
3518 | { | |
3519 | size_t alignment; | |
3520 | #if defined __GNUC__ && __GNUC__ >= 2 | |
3521 | alignment = __alignof (struct Lisp_Float); | |
3522 | #else | |
3523 | alignment = sizeof (struct Lisp_Float); | |
3524 | #endif | |
3525 | pure_bytes_used = ALIGN (pure_bytes_used, alignment); | |
3526 | } | |
3527 | ||
3528 | nbytes = ALIGN (size, sizeof (EMACS_INT)); | |
3529 | if (pure_bytes_used + nbytes > PURESIZE) | |
3530 | error ("Pure Lisp storage exhausted"); | |
3531 | ||
3532 | result = (POINTER_TYPE *) (beg + pure_bytes_used); | |
3533 | pure_bytes_used += nbytes; | |
3534 | return result; | |
3535 | } | |
3536 | ||
3537 | ||
2e471eb5 GM |
3538 | /* Return a string allocated in pure space. DATA is a buffer holding |
3539 | NCHARS characters, and NBYTES bytes of string data. MULTIBYTE | |
3540 | non-zero means make the result string multibyte. | |
1a4f1e2c | 3541 | |
2e471eb5 GM |
3542 | Must get an error if pure storage is full, since if it cannot hold |
3543 | a large string it may be able to hold conses that point to that | |
3544 | string; then the string is not protected from gc. */ | |
7146af97 JB |
3545 | |
3546 | Lisp_Object | |
2e471eb5 | 3547 | make_pure_string (data, nchars, nbytes, multibyte) |
7146af97 | 3548 | char *data; |
2e471eb5 | 3549 | int nchars, nbytes; |
c0696668 | 3550 | int multibyte; |
7146af97 | 3551 | { |
2e471eb5 GM |
3552 | Lisp_Object string; |
3553 | struct Lisp_String *s; | |
c0696668 | 3554 | |
1f0b3fd2 GM |
3555 | s = (struct Lisp_String *) pure_alloc (sizeof *s, Lisp_String); |
3556 | s->data = (unsigned char *) pure_alloc (nbytes + 1, -1); | |
2e471eb5 GM |
3557 | s->size = nchars; |
3558 | s->size_byte = multibyte ? nbytes : -1; | |
3559 | bcopy (data, s->data, nbytes); | |
3560 | s->data[nbytes] = '\0'; | |
3561 | s->intervals = NULL_INTERVAL; | |
2e471eb5 GM |
3562 | XSETSTRING (string, s); |
3563 | return string; | |
7146af97 JB |
3564 | } |
3565 | ||
2e471eb5 | 3566 | |
34400008 GM |
3567 | /* Return a cons allocated from pure space. Give it pure copies |
3568 | of CAR as car and CDR as cdr. */ | |
3569 | ||
7146af97 JB |
3570 | Lisp_Object |
3571 | pure_cons (car, cdr) | |
3572 | Lisp_Object car, cdr; | |
3573 | { | |
3574 | register Lisp_Object new; | |
1f0b3fd2 | 3575 | struct Lisp_Cons *p; |
7146af97 | 3576 | |
1f0b3fd2 GM |
3577 | p = (struct Lisp_Cons *) pure_alloc (sizeof *p, Lisp_Cons); |
3578 | XSETCONS (new, p); | |
70949dac KR |
3579 | XCAR (new) = Fpurecopy (car); |
3580 | XCDR (new) = Fpurecopy (cdr); | |
7146af97 JB |
3581 | return new; |
3582 | } | |
3583 | ||
7146af97 | 3584 | |
34400008 GM |
3585 | /* Value is a float object with value NUM allocated from pure space. */ |
3586 | ||
7146af97 JB |
3587 | Lisp_Object |
3588 | make_pure_float (num) | |
3589 | double num; | |
3590 | { | |
3591 | register Lisp_Object new; | |
1f0b3fd2 | 3592 | struct Lisp_Float *p; |
7146af97 | 3593 | |
1f0b3fd2 GM |
3594 | p = (struct Lisp_Float *) pure_alloc (sizeof *p, Lisp_Float); |
3595 | XSETFLOAT (new, p); | |
70949dac | 3596 | XFLOAT_DATA (new) = num; |
7146af97 JB |
3597 | return new; |
3598 | } | |
3599 | ||
34400008 GM |
3600 | |
3601 | /* Return a vector with room for LEN Lisp_Objects allocated from | |
3602 | pure space. */ | |
3603 | ||
7146af97 JB |
3604 | Lisp_Object |
3605 | make_pure_vector (len) | |
42607681 | 3606 | EMACS_INT len; |
7146af97 | 3607 | { |
1f0b3fd2 GM |
3608 | Lisp_Object new; |
3609 | struct Lisp_Vector *p; | |
3610 | size_t size = sizeof *p + (len - 1) * sizeof (Lisp_Object); | |
7146af97 | 3611 | |
1f0b3fd2 GM |
3612 | p = (struct Lisp_Vector *) pure_alloc (size, Lisp_Vectorlike); |
3613 | XSETVECTOR (new, p); | |
7146af97 JB |
3614 | XVECTOR (new)->size = len; |
3615 | return new; | |
3616 | } | |
3617 | ||
34400008 | 3618 | |
7146af97 JB |
3619 | DEFUN ("purecopy", Fpurecopy, Spurecopy, 1, 1, 0, |
3620 | "Make a copy of OBJECT in pure storage.\n\ | |
3621 | Recursively copies contents of vectors and cons cells.\n\ | |
d71c0668 | 3622 | Does not copy symbols. Copies strings without text properties.") |
7146af97 JB |
3623 | (obj) |
3624 | register Lisp_Object obj; | |
3625 | { | |
265a9e55 | 3626 | if (NILP (Vpurify_flag)) |
7146af97 JB |
3627 | return obj; |
3628 | ||
1f0b3fd2 | 3629 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
3630 | return obj; |
3631 | ||
d6dd74bb | 3632 | if (CONSP (obj)) |
70949dac | 3633 | return pure_cons (XCAR (obj), XCDR (obj)); |
d6dd74bb | 3634 | else if (FLOATP (obj)) |
70949dac | 3635 | return make_pure_float (XFLOAT_DATA (obj)); |
d6dd74bb | 3636 | else if (STRINGP (obj)) |
3f25e183 | 3637 | return make_pure_string (XSTRING (obj)->data, XSTRING (obj)->size, |
c0696668 RS |
3638 | STRING_BYTES (XSTRING (obj)), |
3639 | STRING_MULTIBYTE (obj)); | |
d6dd74bb KH |
3640 | else if (COMPILEDP (obj) || VECTORP (obj)) |
3641 | { | |
3642 | register struct Lisp_Vector *vec; | |
3643 | register int i, size; | |
3644 | ||
3645 | size = XVECTOR (obj)->size; | |
7d535c68 KH |
3646 | if (size & PSEUDOVECTOR_FLAG) |
3647 | size &= PSEUDOVECTOR_SIZE_MASK; | |
01a4d290 | 3648 | vec = XVECTOR (make_pure_vector ((EMACS_INT) size)); |
d6dd74bb KH |
3649 | for (i = 0; i < size; i++) |
3650 | vec->contents[i] = Fpurecopy (XVECTOR (obj)->contents[i]); | |
3651 | if (COMPILEDP (obj)) | |
3652 | XSETCOMPILED (obj, vec); | |
3653 | else | |
3654 | XSETVECTOR (obj, vec); | |
7146af97 JB |
3655 | return obj; |
3656 | } | |
d6dd74bb KH |
3657 | else if (MARKERP (obj)) |
3658 | error ("Attempt to copy a marker to pure storage"); | |
6bbd7a29 GM |
3659 | |
3660 | return obj; | |
7146af97 | 3661 | } |
2e471eb5 | 3662 | |
34400008 | 3663 | |
7146af97 | 3664 | \f |
34400008 GM |
3665 | /*********************************************************************** |
3666 | Protection from GC | |
3667 | ***********************************************************************/ | |
3668 | ||
2e471eb5 GM |
3669 | /* Put an entry in staticvec, pointing at the variable with address |
3670 | VARADDRESS. */ | |
7146af97 JB |
3671 | |
3672 | void | |
3673 | staticpro (varaddress) | |
3674 | Lisp_Object *varaddress; | |
3675 | { | |
3676 | staticvec[staticidx++] = varaddress; | |
3677 | if (staticidx >= NSTATICS) | |
3678 | abort (); | |
3679 | } | |
3680 | ||
3681 | struct catchtag | |
2e471eb5 | 3682 | { |
7146af97 JB |
3683 | Lisp_Object tag; |
3684 | Lisp_Object val; | |
3685 | struct catchtag *next; | |
2e471eb5 | 3686 | }; |
7146af97 JB |
3687 | |
3688 | struct backtrace | |
2e471eb5 GM |
3689 | { |
3690 | struct backtrace *next; | |
3691 | Lisp_Object *function; | |
3692 | Lisp_Object *args; /* Points to vector of args. */ | |
3693 | int nargs; /* Length of vector. */ | |
3694 | /* If nargs is UNEVALLED, args points to slot holding list of | |
3695 | unevalled args. */ | |
3696 | char evalargs; | |
3697 | }; | |
3698 | ||
34400008 | 3699 | |
7146af97 | 3700 | \f |
34400008 GM |
3701 | /*********************************************************************** |
3702 | Protection from GC | |
3703 | ***********************************************************************/ | |
1a4f1e2c | 3704 | |
e8197642 RS |
3705 | /* Temporarily prevent garbage collection. */ |
3706 | ||
3707 | int | |
3708 | inhibit_garbage_collection () | |
3709 | { | |
3710 | int count = specpdl_ptr - specpdl; | |
26b926e1 | 3711 | Lisp_Object number; |
68be917d | 3712 | int nbits = min (VALBITS, BITS_PER_INT); |
e8197642 | 3713 | |
b580578b | 3714 | XSETINT (number, ((EMACS_INT) 1 << (nbits - 1)) - 1); |
26b926e1 RS |
3715 | |
3716 | specbind (Qgc_cons_threshold, number); | |
e8197642 RS |
3717 | |
3718 | return count; | |
3719 | } | |
3720 | ||
34400008 | 3721 | |
7146af97 JB |
3722 | DEFUN ("garbage-collect", Fgarbage_collect, Sgarbage_collect, 0, 0, "", |
3723 | "Reclaim storage for Lisp objects no longer needed.\n\ | |
3724 | Returns info on amount of space in use:\n\ | |
3725 | ((USED-CONSES . FREE-CONSES) (USED-SYMS . FREE-SYMS)\n\ | |
3726 | (USED-MARKERS . FREE-MARKERS) USED-STRING-CHARS USED-VECTOR-SLOTS\n\ | |
96117bc7 | 3727 | (USED-FLOATS . FREE-FLOATS) (USED-INTERVALS . FREE-INTERVALS)\n\ |
2e471eb5 | 3728 | (USED-STRINGS . FREE-STRINGS))\n\ |
7146af97 JB |
3729 | Garbage collection happens automatically if you cons more than\n\ |
3730 | `gc-cons-threshold' bytes of Lisp data since previous garbage collection.") | |
3731 | () | |
3732 | { | |
3733 | register struct gcpro *tail; | |
3734 | register struct specbinding *bind; | |
3735 | struct catchtag *catch; | |
3736 | struct handler *handler; | |
3737 | register struct backtrace *backlist; | |
7146af97 JB |
3738 | char stack_top_variable; |
3739 | register int i; | |
6efc7df7 | 3740 | int message_p; |
96117bc7 | 3741 | Lisp_Object total[8]; |
98edb5ff | 3742 | int count = BINDING_STACK_SIZE (); |
7146af97 | 3743 | |
58595309 KH |
3744 | /* In case user calls debug_print during GC, |
3745 | don't let that cause a recursive GC. */ | |
3746 | consing_since_gc = 0; | |
3747 | ||
6efc7df7 GM |
3748 | /* Save what's currently displayed in the echo area. */ |
3749 | message_p = push_message (); | |
98edb5ff | 3750 | record_unwind_protect (push_message_unwind, Qnil); |
41c28a37 | 3751 | |
7146af97 JB |
3752 | /* Save a copy of the contents of the stack, for debugging. */ |
3753 | #if MAX_SAVE_STACK > 0 | |
265a9e55 | 3754 | if (NILP (Vpurify_flag)) |
7146af97 JB |
3755 | { |
3756 | i = &stack_top_variable - stack_bottom; | |
3757 | if (i < 0) i = -i; | |
3758 | if (i < MAX_SAVE_STACK) | |
3759 | { | |
3760 | if (stack_copy == 0) | |
9ac0d9e0 | 3761 | stack_copy = (char *) xmalloc (stack_copy_size = i); |
7146af97 | 3762 | else if (stack_copy_size < i) |
9ac0d9e0 | 3763 | stack_copy = (char *) xrealloc (stack_copy, (stack_copy_size = i)); |
7146af97 JB |
3764 | if (stack_copy) |
3765 | { | |
42607681 | 3766 | if ((EMACS_INT) (&stack_top_variable - stack_bottom) > 0) |
7146af97 JB |
3767 | bcopy (stack_bottom, stack_copy, i); |
3768 | else | |
3769 | bcopy (&stack_top_variable, stack_copy, i); | |
3770 | } | |
3771 | } | |
3772 | } | |
3773 | #endif /* MAX_SAVE_STACK > 0 */ | |
3774 | ||
299585ee | 3775 | if (garbage_collection_messages) |
691c4285 | 3776 | message1_nolog ("Garbage collecting..."); |
7146af97 | 3777 | |
6e0fca1d RS |
3778 | BLOCK_INPUT; |
3779 | ||
eec7b73d RS |
3780 | shrink_regexp_cache (); |
3781 | ||
4929a878 | 3782 | /* Don't keep undo information around forever. */ |
7146af97 JB |
3783 | { |
3784 | register struct buffer *nextb = all_buffers; | |
3785 | ||
3786 | while (nextb) | |
3787 | { | |
ffd56f97 JB |
3788 | /* If a buffer's undo list is Qt, that means that undo is |
3789 | turned off in that buffer. Calling truncate_undo_list on | |
3790 | Qt tends to return NULL, which effectively turns undo back on. | |
3791 | So don't call truncate_undo_list if undo_list is Qt. */ | |
3792 | if (! EQ (nextb->undo_list, Qt)) | |
3793 | nextb->undo_list | |
502b9b64 JB |
3794 | = truncate_undo_list (nextb->undo_list, undo_limit, |
3795 | undo_strong_limit); | |
7146af97 JB |
3796 | nextb = nextb->next; |
3797 | } | |
3798 | } | |
3799 | ||
3800 | gc_in_progress = 1; | |
3801 | ||
c23baf9f | 3802 | /* clear_marks (); */ |
7146af97 | 3803 | |
7146af97 JB |
3804 | /* Mark all the special slots that serve as the roots of accessibility. |
3805 | ||
3806 | Usually the special slots to mark are contained in particular structures. | |
3807 | Then we know no slot is marked twice because the structures don't overlap. | |
3808 | In some cases, the structures point to the slots to be marked. | |
3809 | For these, we use MARKBIT to avoid double marking of the slot. */ | |
3810 | ||
3811 | for (i = 0; i < staticidx; i++) | |
3812 | mark_object (staticvec[i]); | |
34400008 GM |
3813 | |
3814 | #if (GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS \ | |
3815 | || GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS) | |
3816 | mark_stack (); | |
3817 | #else | |
7146af97 JB |
3818 | for (tail = gcprolist; tail; tail = tail->next) |
3819 | for (i = 0; i < tail->nvars; i++) | |
3820 | if (!XMARKBIT (tail->var[i])) | |
3821 | { | |
1efc2bb9 EZ |
3822 | /* Explicit casting prevents compiler warning about |
3823 | discarding the `volatile' qualifier. */ | |
3824 | mark_object ((Lisp_Object *)&tail->var[i]); | |
7146af97 JB |
3825 | XMARK (tail->var[i]); |
3826 | } | |
34400008 GM |
3827 | #endif |
3828 | ||
630686c8 | 3829 | mark_byte_stack (); |
7146af97 JB |
3830 | for (bind = specpdl; bind != specpdl_ptr; bind++) |
3831 | { | |
3832 | mark_object (&bind->symbol); | |
3833 | mark_object (&bind->old_value); | |
3834 | } | |
3835 | for (catch = catchlist; catch; catch = catch->next) | |
3836 | { | |
3837 | mark_object (&catch->tag); | |
3838 | mark_object (&catch->val); | |
3839 | } | |
3840 | for (handler = handlerlist; handler; handler = handler->next) | |
3841 | { | |
3842 | mark_object (&handler->handler); | |
3843 | mark_object (&handler->var); | |
3844 | } | |
3845 | for (backlist = backtrace_list; backlist; backlist = backlist->next) | |
3846 | { | |
3847 | if (!XMARKBIT (*backlist->function)) | |
3848 | { | |
3849 | mark_object (backlist->function); | |
3850 | XMARK (*backlist->function); | |
3851 | } | |
3852 | if (backlist->nargs == UNEVALLED || backlist->nargs == MANY) | |
3853 | i = 0; | |
3854 | else | |
3855 | i = backlist->nargs - 1; | |
3856 | for (; i >= 0; i--) | |
3857 | if (!XMARKBIT (backlist->args[i])) | |
3858 | { | |
3859 | mark_object (&backlist->args[i]); | |
3860 | XMARK (backlist->args[i]); | |
3861 | } | |
3862 | } | |
b875d3f7 | 3863 | mark_kboards (); |
7146af97 | 3864 | |
4c315bda RS |
3865 | /* Look thru every buffer's undo list |
3866 | for elements that update markers that were not marked, | |
3867 | and delete them. */ | |
3868 | { | |
3869 | register struct buffer *nextb = all_buffers; | |
3870 | ||
3871 | while (nextb) | |
3872 | { | |
3873 | /* If a buffer's undo list is Qt, that means that undo is | |
3874 | turned off in that buffer. Calling truncate_undo_list on | |
3875 | Qt tends to return NULL, which effectively turns undo back on. | |
3876 | So don't call truncate_undo_list if undo_list is Qt. */ | |
3877 | if (! EQ (nextb->undo_list, Qt)) | |
3878 | { | |
3879 | Lisp_Object tail, prev; | |
3880 | tail = nextb->undo_list; | |
3881 | prev = Qnil; | |
3882 | while (CONSP (tail)) | |
3883 | { | |
70949dac KR |
3884 | if (GC_CONSP (XCAR (tail)) |
3885 | && GC_MARKERP (XCAR (XCAR (tail))) | |
3886 | && ! XMARKBIT (XMARKER (XCAR (XCAR (tail)))->chain)) | |
4c315bda RS |
3887 | { |
3888 | if (NILP (prev)) | |
70949dac | 3889 | nextb->undo_list = tail = XCDR (tail); |
4c315bda | 3890 | else |
70949dac | 3891 | tail = XCDR (prev) = XCDR (tail); |
4c315bda RS |
3892 | } |
3893 | else | |
3894 | { | |
3895 | prev = tail; | |
70949dac | 3896 | tail = XCDR (tail); |
4c315bda RS |
3897 | } |
3898 | } | |
3899 | } | |
3900 | ||
3901 | nextb = nextb->next; | |
3902 | } | |
3903 | } | |
3904 | ||
34400008 GM |
3905 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
3906 | mark_stack (); | |
3907 | #endif | |
3908 | ||
7146af97 JB |
3909 | gc_sweep (); |
3910 | ||
3911 | /* Clear the mark bits that we set in certain root slots. */ | |
3912 | ||
34400008 GM |
3913 | #if (GC_MARK_STACK == GC_USE_GCPROS_AS_BEFORE \ |
3914 | || GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES) | |
7146af97 JB |
3915 | for (tail = gcprolist; tail; tail = tail->next) |
3916 | for (i = 0; i < tail->nvars; i++) | |
3917 | XUNMARK (tail->var[i]); | |
34400008 GM |
3918 | #endif |
3919 | ||
033a5fa3 | 3920 | unmark_byte_stack (); |
7146af97 JB |
3921 | for (backlist = backtrace_list; backlist; backlist = backlist->next) |
3922 | { | |
3923 | XUNMARK (*backlist->function); | |
3924 | if (backlist->nargs == UNEVALLED || backlist->nargs == MANY) | |
3925 | i = 0; | |
3926 | else | |
3927 | i = backlist->nargs - 1; | |
3928 | for (; i >= 0; i--) | |
3929 | XUNMARK (backlist->args[i]); | |
3930 | } | |
3931 | XUNMARK (buffer_defaults.name); | |
3932 | XUNMARK (buffer_local_symbols.name); | |
3933 | ||
34400008 GM |
3934 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES && 0 |
3935 | dump_zombies (); | |
3936 | #endif | |
3937 | ||
6e0fca1d RS |
3938 | UNBLOCK_INPUT; |
3939 | ||
c23baf9f | 3940 | /* clear_marks (); */ |
7146af97 JB |
3941 | gc_in_progress = 0; |
3942 | ||
3943 | consing_since_gc = 0; | |
3944 | if (gc_cons_threshold < 10000) | |
3945 | gc_cons_threshold = 10000; | |
3946 | ||
299585ee RS |
3947 | if (garbage_collection_messages) |
3948 | { | |
6efc7df7 GM |
3949 | if (message_p || minibuf_level > 0) |
3950 | restore_message (); | |
299585ee RS |
3951 | else |
3952 | message1_nolog ("Garbage collecting...done"); | |
3953 | } | |
7146af97 | 3954 | |
98edb5ff | 3955 | unbind_to (count, Qnil); |
2e471eb5 GM |
3956 | |
3957 | total[0] = Fcons (make_number (total_conses), | |
3958 | make_number (total_free_conses)); | |
3959 | total[1] = Fcons (make_number (total_symbols), | |
3960 | make_number (total_free_symbols)); | |
3961 | total[2] = Fcons (make_number (total_markers), | |
3962 | make_number (total_free_markers)); | |
96117bc7 GM |
3963 | total[3] = make_number (total_string_size); |
3964 | total[4] = make_number (total_vector_size); | |
3965 | total[5] = Fcons (make_number (total_floats), | |
2e471eb5 | 3966 | make_number (total_free_floats)); |
96117bc7 | 3967 | total[6] = Fcons (make_number (total_intervals), |
2e471eb5 | 3968 | make_number (total_free_intervals)); |
96117bc7 | 3969 | total[7] = Fcons (make_number (total_strings), |
2e471eb5 GM |
3970 | make_number (total_free_strings)); |
3971 | ||
34400008 | 3972 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
7146af97 | 3973 | { |
34400008 GM |
3974 | /* Compute average percentage of zombies. */ |
3975 | double nlive = 0; | |
3976 | ||
3977 | for (i = 0; i < 7; ++i) | |
3978 | nlive += XFASTINT (XCAR (total[i])); | |
3979 | ||
3980 | avg_live = (avg_live * ngcs + nlive) / (ngcs + 1); | |
3981 | max_live = max (nlive, max_live); | |
3982 | avg_zombies = (avg_zombies * ngcs + nzombies) / (ngcs + 1); | |
3983 | max_zombies = max (nzombies, max_zombies); | |
3984 | ++ngcs; | |
3985 | } | |
3986 | #endif | |
7146af97 | 3987 | |
96117bc7 | 3988 | return Flist (sizeof total / sizeof *total, total); |
7146af97 | 3989 | } |
34400008 | 3990 | |
41c28a37 | 3991 | |
3770920e GM |
3992 | /* Mark Lisp objects in glyph matrix MATRIX. Currently the |
3993 | only interesting objects referenced from glyphs are strings. */ | |
41c28a37 GM |
3994 | |
3995 | static void | |
3996 | mark_glyph_matrix (matrix) | |
3997 | struct glyph_matrix *matrix; | |
3998 | { | |
3999 | struct glyph_row *row = matrix->rows; | |
4000 | struct glyph_row *end = row + matrix->nrows; | |
4001 | ||
2e471eb5 GM |
4002 | for (; row < end; ++row) |
4003 | if (row->enabled_p) | |
4004 | { | |
4005 | int area; | |
4006 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
4007 | { | |
4008 | struct glyph *glyph = row->glyphs[area]; | |
4009 | struct glyph *end_glyph = glyph + row->used[area]; | |
4010 | ||
4011 | for (; glyph < end_glyph; ++glyph) | |
4012 | if (GC_STRINGP (glyph->object) | |
4013 | && !STRING_MARKED_P (XSTRING (glyph->object))) | |
4014 | mark_object (&glyph->object); | |
4015 | } | |
4016 | } | |
41c28a37 GM |
4017 | } |
4018 | ||
34400008 | 4019 | |
41c28a37 GM |
4020 | /* Mark Lisp faces in the face cache C. */ |
4021 | ||
4022 | static void | |
4023 | mark_face_cache (c) | |
4024 | struct face_cache *c; | |
4025 | { | |
4026 | if (c) | |
4027 | { | |
4028 | int i, j; | |
4029 | for (i = 0; i < c->used; ++i) | |
4030 | { | |
4031 | struct face *face = FACE_FROM_ID (c->f, i); | |
4032 | ||
4033 | if (face) | |
4034 | { | |
4035 | for (j = 0; j < LFACE_VECTOR_SIZE; ++j) | |
4036 | mark_object (&face->lface[j]); | |
41c28a37 GM |
4037 | } |
4038 | } | |
4039 | } | |
4040 | } | |
4041 | ||
4042 | ||
4043 | #ifdef HAVE_WINDOW_SYSTEM | |
4044 | ||
4045 | /* Mark Lisp objects in image IMG. */ | |
4046 | ||
4047 | static void | |
4048 | mark_image (img) | |
4049 | struct image *img; | |
4050 | { | |
4051 | mark_object (&img->spec); | |
4052 | ||
3e60b029 | 4053 | if (!NILP (img->data.lisp_val)) |
41c28a37 GM |
4054 | mark_object (&img->data.lisp_val); |
4055 | } | |
4056 | ||
4057 | ||
4058 | /* Mark Lisp objects in image cache of frame F. It's done this way so | |
4059 | that we don't have to include xterm.h here. */ | |
4060 | ||
4061 | static void | |
4062 | mark_image_cache (f) | |
4063 | struct frame *f; | |
4064 | { | |
4065 | forall_images_in_image_cache (f, mark_image); | |
4066 | } | |
4067 | ||
4068 | #endif /* HAVE_X_WINDOWS */ | |
4069 | ||
4070 | ||
7146af97 | 4071 | \f |
1a4f1e2c | 4072 | /* Mark reference to a Lisp_Object. |
2e471eb5 GM |
4073 | If the object referred to has not been seen yet, recursively mark |
4074 | all the references contained in it. */ | |
7146af97 | 4075 | |
785cd37f RS |
4076 | #define LAST_MARKED_SIZE 500 |
4077 | Lisp_Object *last_marked[LAST_MARKED_SIZE]; | |
4078 | int last_marked_index; | |
4079 | ||
41c28a37 | 4080 | void |
436c5811 RS |
4081 | mark_object (argptr) |
4082 | Lisp_Object *argptr; | |
7146af97 | 4083 | { |
436c5811 | 4084 | Lisp_Object *objptr = argptr; |
7146af97 | 4085 | register Lisp_Object obj; |
4f5c1376 GM |
4086 | #ifdef GC_CHECK_MARKED_OBJECTS |
4087 | void *po; | |
4088 | struct mem_node *m; | |
4089 | #endif | |
7146af97 | 4090 | |
9149e743 | 4091 | loop: |
7146af97 | 4092 | obj = *objptr; |
9149e743 | 4093 | loop2: |
7146af97 JB |
4094 | XUNMARK (obj); |
4095 | ||
1f0b3fd2 | 4096 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
4097 | return; |
4098 | ||
785cd37f RS |
4099 | last_marked[last_marked_index++] = objptr; |
4100 | if (last_marked_index == LAST_MARKED_SIZE) | |
4101 | last_marked_index = 0; | |
4102 | ||
4f5c1376 GM |
4103 | /* Perform some sanity checks on the objects marked here. Abort if |
4104 | we encounter an object we know is bogus. This increases GC time | |
4105 | by ~80%, and requires compilation with GC_MARK_STACK != 0. */ | |
4106 | #ifdef GC_CHECK_MARKED_OBJECTS | |
4107 | ||
4108 | po = (void *) XPNTR (obj); | |
4109 | ||
4110 | /* Check that the object pointed to by PO is known to be a Lisp | |
4111 | structure allocated from the heap. */ | |
4112 | #define CHECK_ALLOCATED() \ | |
4113 | do { \ | |
4114 | m = mem_find (po); \ | |
4115 | if (m == MEM_NIL) \ | |
4116 | abort (); \ | |
4117 | } while (0) | |
4118 | ||
4119 | /* Check that the object pointed to by PO is live, using predicate | |
4120 | function LIVEP. */ | |
4121 | #define CHECK_LIVE(LIVEP) \ | |
4122 | do { \ | |
4123 | if (!LIVEP (m, po)) \ | |
4124 | abort (); \ | |
4125 | } while (0) | |
4126 | ||
4127 | /* Check both of the above conditions. */ | |
4128 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) \ | |
4129 | do { \ | |
4130 | CHECK_ALLOCATED (); \ | |
4131 | CHECK_LIVE (LIVEP); \ | |
4132 | } while (0) \ | |
4133 | ||
4134 | #else /* not GC_CHECK_MARKED_OBJECTS */ | |
4135 | ||
4136 | #define CHECK_ALLOCATED() (void) 0 | |
4137 | #define CHECK_LIVE(LIVEP) (void) 0 | |
4138 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) (void) 0 | |
4139 | ||
4140 | #endif /* not GC_CHECK_MARKED_OBJECTS */ | |
4141 | ||
0220c518 | 4142 | switch (SWITCH_ENUM_CAST (XGCTYPE (obj))) |
7146af97 JB |
4143 | { |
4144 | case Lisp_String: | |
4145 | { | |
4146 | register struct Lisp_String *ptr = XSTRING (obj); | |
4f5c1376 | 4147 | CHECK_ALLOCATED_AND_LIVE (live_string_p); |
d5e35230 | 4148 | MARK_INTERVAL_TREE (ptr->intervals); |
2e471eb5 | 4149 | MARK_STRING (ptr); |
361b097f | 4150 | #ifdef GC_CHECK_STRING_BYTES |
676a7251 GM |
4151 | /* Check that the string size recorded in the string is the |
4152 | same as the one recorded in the sdata structure. */ | |
4153 | CHECK_STRING_BYTES (ptr); | |
361b097f | 4154 | #endif /* GC_CHECK_STRING_BYTES */ |
7146af97 JB |
4155 | } |
4156 | break; | |
4157 | ||
76437631 | 4158 | case Lisp_Vectorlike: |
4f5c1376 GM |
4159 | #ifdef GC_CHECK_MARKED_OBJECTS |
4160 | m = mem_find (po); | |
4161 | if (m == MEM_NIL && !GC_SUBRP (obj) | |
4162 | && po != &buffer_defaults | |
4163 | && po != &buffer_local_symbols) | |
4164 | abort (); | |
4165 | #endif /* GC_CHECK_MARKED_OBJECTS */ | |
4166 | ||
30e3190a | 4167 | if (GC_BUFFERP (obj)) |
6b552283 KH |
4168 | { |
4169 | if (!XMARKBIT (XBUFFER (obj)->name)) | |
4f5c1376 GM |
4170 | { |
4171 | #ifdef GC_CHECK_MARKED_OBJECTS | |
4172 | if (po != &buffer_defaults && po != &buffer_local_symbols) | |
4173 | { | |
4174 | struct buffer *b; | |
4175 | for (b = all_buffers; b && b != po; b = b->next) | |
4176 | ; | |
4177 | if (b == NULL) | |
4178 | abort (); | |
4179 | } | |
4180 | #endif /* GC_CHECK_MARKED_OBJECTS */ | |
4181 | mark_buffer (obj); | |
4182 | } | |
6b552283 | 4183 | } |
30e3190a | 4184 | else if (GC_SUBRP (obj)) |
169ee243 RS |
4185 | break; |
4186 | else if (GC_COMPILEDP (obj)) | |
2e471eb5 GM |
4187 | /* We could treat this just like a vector, but it is better to |
4188 | save the COMPILED_CONSTANTS element for last and avoid | |
4189 | recursion there. */ | |
169ee243 RS |
4190 | { |
4191 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4192 | register EMACS_INT size = ptr->size; | |
169ee243 RS |
4193 | register int i; |
4194 | ||
4195 | if (size & ARRAY_MARK_FLAG) | |
4196 | break; /* Already marked */ | |
4f5c1376 GM |
4197 | |
4198 | CHECK_LIVE (live_vector_p); | |
169ee243 | 4199 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ |
76437631 | 4200 | size &= PSEUDOVECTOR_SIZE_MASK; |
169ee243 RS |
4201 | for (i = 0; i < size; i++) /* and then mark its elements */ |
4202 | { | |
4203 | if (i != COMPILED_CONSTANTS) | |
c70bbf06 | 4204 | mark_object (&ptr->contents[i]); |
169ee243 RS |
4205 | } |
4206 | /* This cast should be unnecessary, but some Mips compiler complains | |
4207 | (MIPS-ABI + SysVR4, DC/OSx, etc). */ | |
c70bbf06 | 4208 | objptr = (Lisp_Object *) &ptr->contents[COMPILED_CONSTANTS]; |
169ee243 RS |
4209 | goto loop; |
4210 | } | |
169ee243 RS |
4211 | else if (GC_FRAMEP (obj)) |
4212 | { | |
c70bbf06 | 4213 | register struct frame *ptr = XFRAME (obj); |
169ee243 RS |
4214 | register EMACS_INT size = ptr->size; |
4215 | ||
4216 | if (size & ARRAY_MARK_FLAG) break; /* Already marked */ | |
4217 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ | |
4218 | ||
4f5c1376 | 4219 | CHECK_LIVE (live_vector_p); |
169ee243 | 4220 | mark_object (&ptr->name); |
894a9d16 | 4221 | mark_object (&ptr->icon_name); |
aba6deb8 | 4222 | mark_object (&ptr->title); |
169ee243 RS |
4223 | mark_object (&ptr->focus_frame); |
4224 | mark_object (&ptr->selected_window); | |
4225 | mark_object (&ptr->minibuffer_window); | |
4226 | mark_object (&ptr->param_alist); | |
4227 | mark_object (&ptr->scroll_bars); | |
4228 | mark_object (&ptr->condemned_scroll_bars); | |
4229 | mark_object (&ptr->menu_bar_items); | |
4230 | mark_object (&ptr->face_alist); | |
4231 | mark_object (&ptr->menu_bar_vector); | |
4232 | mark_object (&ptr->buffer_predicate); | |
a0e1f185 | 4233 | mark_object (&ptr->buffer_list); |
41c28a37 | 4234 | mark_object (&ptr->menu_bar_window); |
9ea173e8 | 4235 | mark_object (&ptr->tool_bar_window); |
41c28a37 GM |
4236 | mark_face_cache (ptr->face_cache); |
4237 | #ifdef HAVE_WINDOW_SYSTEM | |
4238 | mark_image_cache (ptr); | |
e2c556b4 | 4239 | mark_object (&ptr->tool_bar_items); |
9ea173e8 GM |
4240 | mark_object (&ptr->desired_tool_bar_string); |
4241 | mark_object (&ptr->current_tool_bar_string); | |
41c28a37 | 4242 | #endif /* HAVE_WINDOW_SYSTEM */ |
169ee243 | 4243 | } |
7b07587b | 4244 | else if (GC_BOOL_VECTOR_P (obj)) |
707788bd RS |
4245 | { |
4246 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4247 | ||
4248 | if (ptr->size & ARRAY_MARK_FLAG) | |
4249 | break; /* Already marked */ | |
4f5c1376 | 4250 | CHECK_LIVE (live_vector_p); |
707788bd RS |
4251 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ |
4252 | } | |
41c28a37 GM |
4253 | else if (GC_WINDOWP (obj)) |
4254 | { | |
4255 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4256 | struct window *w = XWINDOW (obj); | |
4257 | register EMACS_INT size = ptr->size; | |
41c28a37 GM |
4258 | register int i; |
4259 | ||
4260 | /* Stop if already marked. */ | |
4261 | if (size & ARRAY_MARK_FLAG) | |
4262 | break; | |
4263 | ||
4264 | /* Mark it. */ | |
4f5c1376 | 4265 | CHECK_LIVE (live_vector_p); |
41c28a37 GM |
4266 | ptr->size |= ARRAY_MARK_FLAG; |
4267 | ||
4268 | /* There is no Lisp data above The member CURRENT_MATRIX in | |
4269 | struct WINDOW. Stop marking when that slot is reached. */ | |
4270 | for (i = 0; | |
c70bbf06 | 4271 | (char *) &ptr->contents[i] < (char *) &w->current_matrix; |
41c28a37 | 4272 | i++) |
c70bbf06 | 4273 | mark_object (&ptr->contents[i]); |
41c28a37 GM |
4274 | |
4275 | /* Mark glyphs for leaf windows. Marking window matrices is | |
4276 | sufficient because frame matrices use the same glyph | |
4277 | memory. */ | |
4278 | if (NILP (w->hchild) | |
4279 | && NILP (w->vchild) | |
4280 | && w->current_matrix) | |
4281 | { | |
4282 | mark_glyph_matrix (w->current_matrix); | |
4283 | mark_glyph_matrix (w->desired_matrix); | |
4284 | } | |
4285 | } | |
4286 | else if (GC_HASH_TABLE_P (obj)) | |
4287 | { | |
4288 | struct Lisp_Hash_Table *h = XHASH_TABLE (obj); | |
4289 | EMACS_INT size = h->size; | |
4290 | ||
4291 | /* Stop if already marked. */ | |
4292 | if (size & ARRAY_MARK_FLAG) | |
4293 | break; | |
4f5c1376 | 4294 | |
41c28a37 | 4295 | /* Mark it. */ |
4f5c1376 | 4296 | CHECK_LIVE (live_vector_p); |
41c28a37 GM |
4297 | h->size |= ARRAY_MARK_FLAG; |
4298 | ||
4299 | /* Mark contents. */ | |
4300 | mark_object (&h->test); | |
4301 | mark_object (&h->weak); | |
4302 | mark_object (&h->rehash_size); | |
4303 | mark_object (&h->rehash_threshold); | |
4304 | mark_object (&h->hash); | |
4305 | mark_object (&h->next); | |
4306 | mark_object (&h->index); | |
4307 | mark_object (&h->user_hash_function); | |
4308 | mark_object (&h->user_cmp_function); | |
4309 | ||
4310 | /* If hash table is not weak, mark all keys and values. | |
4311 | For weak tables, mark only the vector. */ | |
4312 | if (GC_NILP (h->weak)) | |
4313 | mark_object (&h->key_and_value); | |
4314 | else | |
4315 | XVECTOR (h->key_and_value)->size |= ARRAY_MARK_FLAG; | |
4316 | ||
4317 | } | |
04ff9756 | 4318 | else |
169ee243 RS |
4319 | { |
4320 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4321 | register EMACS_INT size = ptr->size; | |
169ee243 RS |
4322 | register int i; |
4323 | ||
4324 | if (size & ARRAY_MARK_FLAG) break; /* Already marked */ | |
4f5c1376 | 4325 | CHECK_LIVE (live_vector_p); |
169ee243 RS |
4326 | ptr->size |= ARRAY_MARK_FLAG; /* Else mark it */ |
4327 | if (size & PSEUDOVECTOR_FLAG) | |
4328 | size &= PSEUDOVECTOR_SIZE_MASK; | |
41c28a37 | 4329 | |
169ee243 | 4330 | for (i = 0; i < size; i++) /* and then mark its elements */ |
c70bbf06 | 4331 | mark_object (&ptr->contents[i]); |
169ee243 RS |
4332 | } |
4333 | break; | |
7146af97 | 4334 | |
7146af97 JB |
4335 | case Lisp_Symbol: |
4336 | { | |
c70bbf06 | 4337 | register struct Lisp_Symbol *ptr = XSYMBOL (obj); |
7146af97 JB |
4338 | struct Lisp_Symbol *ptrx; |
4339 | ||
4340 | if (XMARKBIT (ptr->plist)) break; | |
4f5c1376 | 4341 | CHECK_ALLOCATED_AND_LIVE (live_symbol_p); |
7146af97 | 4342 | XMARK (ptr->plist); |
7146af97 JB |
4343 | mark_object ((Lisp_Object *) &ptr->value); |
4344 | mark_object (&ptr->function); | |
4345 | mark_object (&ptr->plist); | |
34400008 GM |
4346 | |
4347 | if (!PURE_POINTER_P (ptr->name)) | |
4348 | MARK_STRING (ptr->name); | |
2e471eb5 | 4349 | MARK_INTERVAL_TREE (ptr->name->intervals); |
2e471eb5 | 4350 | |
1c6bb482 RS |
4351 | /* Note that we do not mark the obarray of the symbol. |
4352 | It is safe not to do so because nothing accesses that | |
4353 | slot except to check whether it is nil. */ | |
7146af97 JB |
4354 | ptr = ptr->next; |
4355 | if (ptr) | |
4356 | { | |
9149e743 KH |
4357 | /* For the benefit of the last_marked log. */ |
4358 | objptr = (Lisp_Object *)&XSYMBOL (obj)->next; | |
b0846f52 | 4359 | ptrx = ptr; /* Use of ptrx avoids compiler bug on Sun */ |
7146af97 | 4360 | XSETSYMBOL (obj, ptrx); |
9149e743 KH |
4361 | /* We can't goto loop here because *objptr doesn't contain an |
4362 | actual Lisp_Object with valid datatype field. */ | |
4363 | goto loop2; | |
7146af97 JB |
4364 | } |
4365 | } | |
4366 | break; | |
4367 | ||
a0a38eb7 | 4368 | case Lisp_Misc: |
4f5c1376 | 4369 | CHECK_ALLOCATED_AND_LIVE (live_misc_p); |
a5da44fe | 4370 | switch (XMISCTYPE (obj)) |
a0a38eb7 KH |
4371 | { |
4372 | case Lisp_Misc_Marker: | |
4373 | XMARK (XMARKER (obj)->chain); | |
4374 | /* DO NOT mark thru the marker's chain. | |
4375 | The buffer's markers chain does not preserve markers from gc; | |
4376 | instead, markers are removed from the chain when freed by gc. */ | |
4377 | break; | |
4378 | ||
465edf35 KH |
4379 | case Lisp_Misc_Buffer_Local_Value: |
4380 | case Lisp_Misc_Some_Buffer_Local_Value: | |
4381 | { | |
4382 | register struct Lisp_Buffer_Local_Value *ptr | |
4383 | = XBUFFER_LOCAL_VALUE (obj); | |
a9faeabe RS |
4384 | if (XMARKBIT (ptr->realvalue)) break; |
4385 | XMARK (ptr->realvalue); | |
465edf35 KH |
4386 | /* If the cdr is nil, avoid recursion for the car. */ |
4387 | if (EQ (ptr->cdr, Qnil)) | |
4388 | { | |
a9faeabe | 4389 | objptr = &ptr->realvalue; |
465edf35 KH |
4390 | goto loop; |
4391 | } | |
a9faeabe RS |
4392 | mark_object (&ptr->realvalue); |
4393 | mark_object (&ptr->buffer); | |
4394 | mark_object (&ptr->frame); | |
c70bbf06 | 4395 | objptr = &ptr->cdr; |
465edf35 KH |
4396 | goto loop; |
4397 | } | |
4398 | ||
c8616056 KH |
4399 | case Lisp_Misc_Intfwd: |
4400 | case Lisp_Misc_Boolfwd: | |
4401 | case Lisp_Misc_Objfwd: | |
4402 | case Lisp_Misc_Buffer_Objfwd: | |
b875d3f7 | 4403 | case Lisp_Misc_Kboard_Objfwd: |
c8616056 KH |
4404 | /* Don't bother with Lisp_Buffer_Objfwd, |
4405 | since all markable slots in current buffer marked anyway. */ | |
4406 | /* Don't need to do Lisp_Objfwd, since the places they point | |
4407 | are protected with staticpro. */ | |
4408 | break; | |
4409 | ||
e202fa34 KH |
4410 | case Lisp_Misc_Overlay: |
4411 | { | |
4412 | struct Lisp_Overlay *ptr = XOVERLAY (obj); | |
4413 | if (!XMARKBIT (ptr->plist)) | |
4414 | { | |
4415 | XMARK (ptr->plist); | |
4416 | mark_object (&ptr->start); | |
4417 | mark_object (&ptr->end); | |
4418 | objptr = &ptr->plist; | |
4419 | goto loop; | |
4420 | } | |
4421 | } | |
4422 | break; | |
4423 | ||
a0a38eb7 KH |
4424 | default: |
4425 | abort (); | |
4426 | } | |
7146af97 JB |
4427 | break; |
4428 | ||
4429 | case Lisp_Cons: | |
7146af97 JB |
4430 | { |
4431 | register struct Lisp_Cons *ptr = XCONS (obj); | |
4432 | if (XMARKBIT (ptr->car)) break; | |
4f5c1376 | 4433 | CHECK_ALLOCATED_AND_LIVE (live_cons_p); |
7146af97 | 4434 | XMARK (ptr->car); |
c54ca951 RS |
4435 | /* If the cdr is nil, avoid recursion for the car. */ |
4436 | if (EQ (ptr->cdr, Qnil)) | |
4437 | { | |
4438 | objptr = &ptr->car; | |
c54ca951 RS |
4439 | goto loop; |
4440 | } | |
7146af97 | 4441 | mark_object (&ptr->car); |
c70bbf06 | 4442 | objptr = &ptr->cdr; |
7146af97 JB |
4443 | goto loop; |
4444 | } | |
4445 | ||
7146af97 | 4446 | case Lisp_Float: |
4f5c1376 | 4447 | CHECK_ALLOCATED_AND_LIVE (live_float_p); |
7146af97 JB |
4448 | XMARK (XFLOAT (obj)->type); |
4449 | break; | |
7146af97 | 4450 | |
7146af97 | 4451 | case Lisp_Int: |
7146af97 JB |
4452 | break; |
4453 | ||
4454 | default: | |
4455 | abort (); | |
4456 | } | |
4f5c1376 GM |
4457 | |
4458 | #undef CHECK_LIVE | |
4459 | #undef CHECK_ALLOCATED | |
4460 | #undef CHECK_ALLOCATED_AND_LIVE | |
7146af97 JB |
4461 | } |
4462 | ||
4463 | /* Mark the pointers in a buffer structure. */ | |
4464 | ||
4465 | static void | |
4466 | mark_buffer (buf) | |
4467 | Lisp_Object buf; | |
4468 | { | |
7146af97 JB |
4469 | register struct buffer *buffer = XBUFFER (buf); |
4470 | register Lisp_Object *ptr; | |
30e3190a | 4471 | Lisp_Object base_buffer; |
7146af97 JB |
4472 | |
4473 | /* This is the buffer's markbit */ | |
4474 | mark_object (&buffer->name); | |
4475 | XMARK (buffer->name); | |
4476 | ||
30e3190a | 4477 | MARK_INTERVAL_TREE (BUF_INTERVALS (buffer)); |
d5e35230 | 4478 | |
4c315bda RS |
4479 | if (CONSP (buffer->undo_list)) |
4480 | { | |
4481 | Lisp_Object tail; | |
4482 | tail = buffer->undo_list; | |
4483 | ||
4484 | while (CONSP (tail)) | |
4485 | { | |
4486 | register struct Lisp_Cons *ptr = XCONS (tail); | |
4487 | ||
4488 | if (XMARKBIT (ptr->car)) | |
4489 | break; | |
4490 | XMARK (ptr->car); | |
4491 | if (GC_CONSP (ptr->car) | |
70949dac KR |
4492 | && ! XMARKBIT (XCAR (ptr->car)) |
4493 | && GC_MARKERP (XCAR (ptr->car))) | |
4c315bda | 4494 | { |
70949dac KR |
4495 | XMARK (XCAR (ptr->car)); |
4496 | mark_object (&XCDR (ptr->car)); | |
4c315bda RS |
4497 | } |
4498 | else | |
4499 | mark_object (&ptr->car); | |
4500 | ||
4501 | if (CONSP (ptr->cdr)) | |
4502 | tail = ptr->cdr; | |
4503 | else | |
4504 | break; | |
4505 | } | |
4506 | ||
70949dac | 4507 | mark_object (&XCDR (tail)); |
4c315bda RS |
4508 | } |
4509 | else | |
4510 | mark_object (&buffer->undo_list); | |
4511 | ||
7146af97 JB |
4512 | for (ptr = &buffer->name + 1; |
4513 | (char *)ptr < (char *)buffer + sizeof (struct buffer); | |
4514 | ptr++) | |
4515 | mark_object (ptr); | |
30e3190a RS |
4516 | |
4517 | /* If this is an indirect buffer, mark its base buffer. */ | |
6b552283 | 4518 | if (buffer->base_buffer && !XMARKBIT (buffer->base_buffer->name)) |
30e3190a RS |
4519 | { |
4520 | XSETBUFFER (base_buffer, buffer->base_buffer); | |
4521 | mark_buffer (base_buffer); | |
4522 | } | |
7146af97 | 4523 | } |
084b1a0c KH |
4524 | |
4525 | ||
b875d3f7 | 4526 | /* Mark the pointers in the kboard objects. */ |
084b1a0c KH |
4527 | |
4528 | static void | |
b875d3f7 | 4529 | mark_kboards () |
084b1a0c | 4530 | { |
b875d3f7 | 4531 | KBOARD *kb; |
b94daf1e | 4532 | Lisp_Object *p; |
b875d3f7 | 4533 | for (kb = all_kboards; kb; kb = kb->next_kboard) |
084b1a0c | 4534 | { |
b94daf1e KH |
4535 | if (kb->kbd_macro_buffer) |
4536 | for (p = kb->kbd_macro_buffer; p < kb->kbd_macro_ptr; p++) | |
4537 | mark_object (p); | |
4bfd0c4f RS |
4538 | mark_object (&kb->Voverriding_terminal_local_map); |
4539 | mark_object (&kb->Vlast_command); | |
4540 | mark_object (&kb->Vreal_last_command); | |
9671abc2 | 4541 | mark_object (&kb->Vprefix_arg); |
23c73c16 | 4542 | mark_object (&kb->Vlast_prefix_arg); |
b875d3f7 | 4543 | mark_object (&kb->kbd_queue); |
4bfd0c4f | 4544 | mark_object (&kb->defining_kbd_macro); |
b875d3f7 | 4545 | mark_object (&kb->Vlast_kbd_macro); |
b94daf1e | 4546 | mark_object (&kb->Vsystem_key_alist); |
6d03a6fd | 4547 | mark_object (&kb->system_key_syms); |
4bfd0c4f | 4548 | mark_object (&kb->Vdefault_minibuffer_frame); |
084b1a0c KH |
4549 | } |
4550 | } | |
41c28a37 GM |
4551 | |
4552 | ||
4553 | /* Value is non-zero if OBJ will survive the current GC because it's | |
4554 | either marked or does not need to be marked to survive. */ | |
4555 | ||
4556 | int | |
4557 | survives_gc_p (obj) | |
4558 | Lisp_Object obj; | |
4559 | { | |
4560 | int survives_p; | |
4561 | ||
4562 | switch (XGCTYPE (obj)) | |
4563 | { | |
4564 | case Lisp_Int: | |
4565 | survives_p = 1; | |
4566 | break; | |
4567 | ||
4568 | case Lisp_Symbol: | |
4569 | survives_p = XMARKBIT (XSYMBOL (obj)->plist); | |
4570 | break; | |
4571 | ||
4572 | case Lisp_Misc: | |
4573 | switch (XMISCTYPE (obj)) | |
4574 | { | |
4575 | case Lisp_Misc_Marker: | |
4576 | survives_p = XMARKBIT (obj); | |
4577 | break; | |
4578 | ||
4579 | case Lisp_Misc_Buffer_Local_Value: | |
4580 | case Lisp_Misc_Some_Buffer_Local_Value: | |
4581 | survives_p = XMARKBIT (XBUFFER_LOCAL_VALUE (obj)->realvalue); | |
4582 | break; | |
4583 | ||
4584 | case Lisp_Misc_Intfwd: | |
4585 | case Lisp_Misc_Boolfwd: | |
4586 | case Lisp_Misc_Objfwd: | |
4587 | case Lisp_Misc_Buffer_Objfwd: | |
4588 | case Lisp_Misc_Kboard_Objfwd: | |
4589 | survives_p = 1; | |
4590 | break; | |
4591 | ||
4592 | case Lisp_Misc_Overlay: | |
4593 | survives_p = XMARKBIT (XOVERLAY (obj)->plist); | |
4594 | break; | |
4595 | ||
4596 | default: | |
4597 | abort (); | |
4598 | } | |
4599 | break; | |
4600 | ||
4601 | case Lisp_String: | |
4602 | { | |
4603 | struct Lisp_String *s = XSTRING (obj); | |
2e471eb5 | 4604 | survives_p = STRING_MARKED_P (s); |
41c28a37 GM |
4605 | } |
4606 | break; | |
4607 | ||
4608 | case Lisp_Vectorlike: | |
4609 | if (GC_BUFFERP (obj)) | |
4610 | survives_p = XMARKBIT (XBUFFER (obj)->name); | |
4611 | else if (GC_SUBRP (obj)) | |
4612 | survives_p = 1; | |
4613 | else | |
4614 | survives_p = XVECTOR (obj)->size & ARRAY_MARK_FLAG; | |
4615 | break; | |
4616 | ||
4617 | case Lisp_Cons: | |
4618 | survives_p = XMARKBIT (XCAR (obj)); | |
4619 | break; | |
4620 | ||
41c28a37 GM |
4621 | case Lisp_Float: |
4622 | survives_p = XMARKBIT (XFLOAT (obj)->type); | |
4623 | break; | |
41c28a37 GM |
4624 | |
4625 | default: | |
4626 | abort (); | |
4627 | } | |
4628 | ||
34400008 | 4629 | return survives_p || PURE_POINTER_P ((void *) XPNTR (obj)); |
41c28a37 GM |
4630 | } |
4631 | ||
4632 | ||
7146af97 | 4633 | \f |
1a4f1e2c | 4634 | /* Sweep: find all structures not marked, and free them. */ |
7146af97 JB |
4635 | |
4636 | static void | |
4637 | gc_sweep () | |
4638 | { | |
41c28a37 GM |
4639 | /* Remove or mark entries in weak hash tables. |
4640 | This must be done before any object is unmarked. */ | |
4641 | sweep_weak_hash_tables (); | |
4642 | ||
2e471eb5 | 4643 | sweep_strings (); |
676a7251 GM |
4644 | #ifdef GC_CHECK_STRING_BYTES |
4645 | if (!noninteractive) | |
4646 | check_string_bytes (1); | |
4647 | #endif | |
7146af97 JB |
4648 | |
4649 | /* Put all unmarked conses on free list */ | |
4650 | { | |
4651 | register struct cons_block *cblk; | |
6ca94ac9 | 4652 | struct cons_block **cprev = &cons_block; |
7146af97 JB |
4653 | register int lim = cons_block_index; |
4654 | register int num_free = 0, num_used = 0; | |
4655 | ||
4656 | cons_free_list = 0; | |
4657 | ||
6ca94ac9 | 4658 | for (cblk = cons_block; cblk; cblk = *cprev) |
7146af97 JB |
4659 | { |
4660 | register int i; | |
6ca94ac9 | 4661 | int this_free = 0; |
7146af97 JB |
4662 | for (i = 0; i < lim; i++) |
4663 | if (!XMARKBIT (cblk->conses[i].car)) | |
4664 | { | |
6ca94ac9 | 4665 | this_free++; |
1cd5fe6a | 4666 | *(struct Lisp_Cons **)&cblk->conses[i].cdr = cons_free_list; |
7146af97 | 4667 | cons_free_list = &cblk->conses[i]; |
34400008 GM |
4668 | #if GC_MARK_STACK |
4669 | cons_free_list->car = Vdead; | |
4670 | #endif | |
7146af97 JB |
4671 | } |
4672 | else | |
4673 | { | |
4674 | num_used++; | |
4675 | XUNMARK (cblk->conses[i].car); | |
4676 | } | |
4677 | lim = CONS_BLOCK_SIZE; | |
6ca94ac9 KH |
4678 | /* If this block contains only free conses and we have already |
4679 | seen more than two blocks worth of free conses then deallocate | |
4680 | this block. */ | |
6feef451 | 4681 | if (this_free == CONS_BLOCK_SIZE && num_free > CONS_BLOCK_SIZE) |
6ca94ac9 | 4682 | { |
6ca94ac9 KH |
4683 | *cprev = cblk->next; |
4684 | /* Unhook from the free list. */ | |
4685 | cons_free_list = *(struct Lisp_Cons **) &cblk->conses[0].cdr; | |
c8099634 RS |
4686 | lisp_free (cblk); |
4687 | n_cons_blocks--; | |
6ca94ac9 KH |
4688 | } |
4689 | else | |
6feef451 AS |
4690 | { |
4691 | num_free += this_free; | |
4692 | cprev = &cblk->next; | |
4693 | } | |
7146af97 JB |
4694 | } |
4695 | total_conses = num_used; | |
4696 | total_free_conses = num_free; | |
4697 | } | |
4698 | ||
7146af97 JB |
4699 | /* Put all unmarked floats on free list */ |
4700 | { | |
4701 | register struct float_block *fblk; | |
6ca94ac9 | 4702 | struct float_block **fprev = &float_block; |
7146af97 JB |
4703 | register int lim = float_block_index; |
4704 | register int num_free = 0, num_used = 0; | |
4705 | ||
4706 | float_free_list = 0; | |
4707 | ||
6ca94ac9 | 4708 | for (fblk = float_block; fblk; fblk = *fprev) |
7146af97 JB |
4709 | { |
4710 | register int i; | |
6ca94ac9 | 4711 | int this_free = 0; |
7146af97 JB |
4712 | for (i = 0; i < lim; i++) |
4713 | if (!XMARKBIT (fblk->floats[i].type)) | |
4714 | { | |
6ca94ac9 | 4715 | this_free++; |
1cd5fe6a | 4716 | *(struct Lisp_Float **)&fblk->floats[i].data = float_free_list; |
7146af97 | 4717 | float_free_list = &fblk->floats[i]; |
34400008 GM |
4718 | #if GC_MARK_STACK |
4719 | float_free_list->type = Vdead; | |
4720 | #endif | |
7146af97 JB |
4721 | } |
4722 | else | |
4723 | { | |
4724 | num_used++; | |
4725 | XUNMARK (fblk->floats[i].type); | |
4726 | } | |
4727 | lim = FLOAT_BLOCK_SIZE; | |
6ca94ac9 KH |
4728 | /* If this block contains only free floats and we have already |
4729 | seen more than two blocks worth of free floats then deallocate | |
4730 | this block. */ | |
6feef451 | 4731 | if (this_free == FLOAT_BLOCK_SIZE && num_free > FLOAT_BLOCK_SIZE) |
6ca94ac9 | 4732 | { |
6ca94ac9 KH |
4733 | *fprev = fblk->next; |
4734 | /* Unhook from the free list. */ | |
4735 | float_free_list = *(struct Lisp_Float **) &fblk->floats[0].data; | |
c8099634 RS |
4736 | lisp_free (fblk); |
4737 | n_float_blocks--; | |
6ca94ac9 KH |
4738 | } |
4739 | else | |
6feef451 AS |
4740 | { |
4741 | num_free += this_free; | |
4742 | fprev = &fblk->next; | |
4743 | } | |
7146af97 JB |
4744 | } |
4745 | total_floats = num_used; | |
4746 | total_free_floats = num_free; | |
4747 | } | |
7146af97 | 4748 | |
d5e35230 JA |
4749 | /* Put all unmarked intervals on free list */ |
4750 | { | |
4751 | register struct interval_block *iblk; | |
6ca94ac9 | 4752 | struct interval_block **iprev = &interval_block; |
d5e35230 JA |
4753 | register int lim = interval_block_index; |
4754 | register int num_free = 0, num_used = 0; | |
4755 | ||
4756 | interval_free_list = 0; | |
4757 | ||
6ca94ac9 | 4758 | for (iblk = interval_block; iblk; iblk = *iprev) |
d5e35230 JA |
4759 | { |
4760 | register int i; | |
6ca94ac9 | 4761 | int this_free = 0; |
d5e35230 JA |
4762 | |
4763 | for (i = 0; i < lim; i++) | |
4764 | { | |
4765 | if (! XMARKBIT (iblk->intervals[i].plist)) | |
4766 | { | |
439d5cb4 | 4767 | SET_INTERVAL_PARENT (&iblk->intervals[i], interval_free_list); |
d5e35230 | 4768 | interval_free_list = &iblk->intervals[i]; |
6ca94ac9 | 4769 | this_free++; |
d5e35230 JA |
4770 | } |
4771 | else | |
4772 | { | |
4773 | num_used++; | |
4774 | XUNMARK (iblk->intervals[i].plist); | |
4775 | } | |
4776 | } | |
4777 | lim = INTERVAL_BLOCK_SIZE; | |
6ca94ac9 KH |
4778 | /* If this block contains only free intervals and we have already |
4779 | seen more than two blocks worth of free intervals then | |
4780 | deallocate this block. */ | |
6feef451 | 4781 | if (this_free == INTERVAL_BLOCK_SIZE && num_free > INTERVAL_BLOCK_SIZE) |
6ca94ac9 | 4782 | { |
6ca94ac9 KH |
4783 | *iprev = iblk->next; |
4784 | /* Unhook from the free list. */ | |
439d5cb4 | 4785 | interval_free_list = INTERVAL_PARENT (&iblk->intervals[0]); |
c8099634 RS |
4786 | lisp_free (iblk); |
4787 | n_interval_blocks--; | |
6ca94ac9 KH |
4788 | } |
4789 | else | |
6feef451 AS |
4790 | { |
4791 | num_free += this_free; | |
4792 | iprev = &iblk->next; | |
4793 | } | |
d5e35230 JA |
4794 | } |
4795 | total_intervals = num_used; | |
4796 | total_free_intervals = num_free; | |
4797 | } | |
d5e35230 | 4798 | |
7146af97 JB |
4799 | /* Put all unmarked symbols on free list */ |
4800 | { | |
4801 | register struct symbol_block *sblk; | |
6ca94ac9 | 4802 | struct symbol_block **sprev = &symbol_block; |
7146af97 JB |
4803 | register int lim = symbol_block_index; |
4804 | register int num_free = 0, num_used = 0; | |
4805 | ||
d285b373 | 4806 | symbol_free_list = NULL; |
7146af97 | 4807 | |
6ca94ac9 | 4808 | for (sblk = symbol_block; sblk; sblk = *sprev) |
7146af97 | 4809 | { |
6ca94ac9 | 4810 | int this_free = 0; |
d285b373 GM |
4811 | struct Lisp_Symbol *sym = sblk->symbols; |
4812 | struct Lisp_Symbol *end = sym + lim; | |
4813 | ||
4814 | for (; sym < end; ++sym) | |
4815 | { | |
20035321 SM |
4816 | /* Check if the symbol was created during loadup. In such a case |
4817 | it might be pointed to by pure bytecode which we don't trace, | |
4818 | so we conservatively assume that it is live. */ | |
d285b373 GM |
4819 | int pure_p = PURE_POINTER_P (sym->name); |
4820 | ||
4821 | if (!XMARKBIT (sym->plist) && !pure_p) | |
4822 | { | |
4823 | *(struct Lisp_Symbol **) &sym->value = symbol_free_list; | |
4824 | symbol_free_list = sym; | |
34400008 | 4825 | #if GC_MARK_STACK |
d285b373 | 4826 | symbol_free_list->function = Vdead; |
34400008 | 4827 | #endif |
d285b373 GM |
4828 | ++this_free; |
4829 | } | |
4830 | else | |
4831 | { | |
4832 | ++num_used; | |
4833 | if (!pure_p) | |
4834 | UNMARK_STRING (sym->name); | |
4835 | XUNMARK (sym->plist); | |
4836 | } | |
4837 | } | |
4838 | ||
7146af97 | 4839 | lim = SYMBOL_BLOCK_SIZE; |
6ca94ac9 KH |
4840 | /* If this block contains only free symbols and we have already |
4841 | seen more than two blocks worth of free symbols then deallocate | |
4842 | this block. */ | |
6feef451 | 4843 | if (this_free == SYMBOL_BLOCK_SIZE && num_free > SYMBOL_BLOCK_SIZE) |
6ca94ac9 | 4844 | { |
6ca94ac9 KH |
4845 | *sprev = sblk->next; |
4846 | /* Unhook from the free list. */ | |
4847 | symbol_free_list = *(struct Lisp_Symbol **)&sblk->symbols[0].value; | |
c8099634 RS |
4848 | lisp_free (sblk); |
4849 | n_symbol_blocks--; | |
6ca94ac9 KH |
4850 | } |
4851 | else | |
6feef451 AS |
4852 | { |
4853 | num_free += this_free; | |
4854 | sprev = &sblk->next; | |
4855 | } | |
7146af97 JB |
4856 | } |
4857 | total_symbols = num_used; | |
4858 | total_free_symbols = num_free; | |
4859 | } | |
4860 | ||
a9faeabe RS |
4861 | /* Put all unmarked misc's on free list. |
4862 | For a marker, first unchain it from the buffer it points into. */ | |
7146af97 JB |
4863 | { |
4864 | register struct marker_block *mblk; | |
6ca94ac9 | 4865 | struct marker_block **mprev = &marker_block; |
7146af97 JB |
4866 | register int lim = marker_block_index; |
4867 | register int num_free = 0, num_used = 0; | |
4868 | ||
4869 | marker_free_list = 0; | |
4870 | ||
6ca94ac9 | 4871 | for (mblk = marker_block; mblk; mblk = *mprev) |
7146af97 JB |
4872 | { |
4873 | register int i; | |
6ca94ac9 | 4874 | int this_free = 0; |
26b926e1 | 4875 | EMACS_INT already_free = -1; |
fa05e253 | 4876 | |
7146af97 | 4877 | for (i = 0; i < lim; i++) |
465edf35 KH |
4878 | { |
4879 | Lisp_Object *markword; | |
a5da44fe | 4880 | switch (mblk->markers[i].u_marker.type) |
465edf35 KH |
4881 | { |
4882 | case Lisp_Misc_Marker: | |
4883 | markword = &mblk->markers[i].u_marker.chain; | |
4884 | break; | |
4885 | case Lisp_Misc_Buffer_Local_Value: | |
4886 | case Lisp_Misc_Some_Buffer_Local_Value: | |
a9faeabe | 4887 | markword = &mblk->markers[i].u_buffer_local_value.realvalue; |
465edf35 | 4888 | break; |
e202fa34 KH |
4889 | case Lisp_Misc_Overlay: |
4890 | markword = &mblk->markers[i].u_overlay.plist; | |
4891 | break; | |
fa05e253 RS |
4892 | case Lisp_Misc_Free: |
4893 | /* If the object was already free, keep it | |
4894 | on the free list. */ | |
74d84334 | 4895 | markword = (Lisp_Object *) &already_free; |
fa05e253 | 4896 | break; |
465edf35 KH |
4897 | default: |
4898 | markword = 0; | |
e202fa34 | 4899 | break; |
465edf35 KH |
4900 | } |
4901 | if (markword && !XMARKBIT (*markword)) | |
4902 | { | |
4903 | Lisp_Object tem; | |
a5da44fe | 4904 | if (mblk->markers[i].u_marker.type == Lisp_Misc_Marker) |
465edf35 KH |
4905 | { |
4906 | /* tem1 avoids Sun compiler bug */ | |
4907 | struct Lisp_Marker *tem1 = &mblk->markers[i].u_marker; | |
4908 | XSETMARKER (tem, tem1); | |
4909 | unchain_marker (tem); | |
4910 | } | |
fa05e253 RS |
4911 | /* Set the type of the freed object to Lisp_Misc_Free. |
4912 | We could leave the type alone, since nobody checks it, | |
465edf35 | 4913 | but this might catch bugs faster. */ |
a5da44fe | 4914 | mblk->markers[i].u_marker.type = Lisp_Misc_Free; |
465edf35 KH |
4915 | mblk->markers[i].u_free.chain = marker_free_list; |
4916 | marker_free_list = &mblk->markers[i]; | |
6ca94ac9 | 4917 | this_free++; |
465edf35 KH |
4918 | } |
4919 | else | |
4920 | { | |
4921 | num_used++; | |
4922 | if (markword) | |
4923 | XUNMARK (*markword); | |
4924 | } | |
4925 | } | |
7146af97 | 4926 | lim = MARKER_BLOCK_SIZE; |
6ca94ac9 KH |
4927 | /* If this block contains only free markers and we have already |
4928 | seen more than two blocks worth of free markers then deallocate | |
4929 | this block. */ | |
6feef451 | 4930 | if (this_free == MARKER_BLOCK_SIZE && num_free > MARKER_BLOCK_SIZE) |
6ca94ac9 | 4931 | { |
6ca94ac9 KH |
4932 | *mprev = mblk->next; |
4933 | /* Unhook from the free list. */ | |
4934 | marker_free_list = mblk->markers[0].u_free.chain; | |
c8099634 RS |
4935 | lisp_free (mblk); |
4936 | n_marker_blocks--; | |
6ca94ac9 KH |
4937 | } |
4938 | else | |
6feef451 AS |
4939 | { |
4940 | num_free += this_free; | |
4941 | mprev = &mblk->next; | |
4942 | } | |
7146af97 JB |
4943 | } |
4944 | ||
4945 | total_markers = num_used; | |
4946 | total_free_markers = num_free; | |
4947 | } | |
4948 | ||
4949 | /* Free all unmarked buffers */ | |
4950 | { | |
4951 | register struct buffer *buffer = all_buffers, *prev = 0, *next; | |
4952 | ||
4953 | while (buffer) | |
4954 | if (!XMARKBIT (buffer->name)) | |
4955 | { | |
4956 | if (prev) | |
4957 | prev->next = buffer->next; | |
4958 | else | |
4959 | all_buffers = buffer->next; | |
4960 | next = buffer->next; | |
34400008 | 4961 | lisp_free (buffer); |
7146af97 JB |
4962 | buffer = next; |
4963 | } | |
4964 | else | |
4965 | { | |
4966 | XUNMARK (buffer->name); | |
30e3190a | 4967 | UNMARK_BALANCE_INTERVALS (BUF_INTERVALS (buffer)); |
7146af97 JB |
4968 | prev = buffer, buffer = buffer->next; |
4969 | } | |
4970 | } | |
4971 | ||
7146af97 JB |
4972 | /* Free all unmarked vectors */ |
4973 | { | |
4974 | register struct Lisp_Vector *vector = all_vectors, *prev = 0, *next; | |
4975 | total_vector_size = 0; | |
4976 | ||
4977 | while (vector) | |
4978 | if (!(vector->size & ARRAY_MARK_FLAG)) | |
4979 | { | |
4980 | if (prev) | |
4981 | prev->next = vector->next; | |
4982 | else | |
4983 | all_vectors = vector->next; | |
4984 | next = vector->next; | |
c8099634 RS |
4985 | lisp_free (vector); |
4986 | n_vectors--; | |
7146af97 | 4987 | vector = next; |
41c28a37 | 4988 | |
7146af97 JB |
4989 | } |
4990 | else | |
4991 | { | |
4992 | vector->size &= ~ARRAY_MARK_FLAG; | |
fa05e253 RS |
4993 | if (vector->size & PSEUDOVECTOR_FLAG) |
4994 | total_vector_size += (PSEUDOVECTOR_SIZE_MASK & vector->size); | |
4995 | else | |
4996 | total_vector_size += vector->size; | |
7146af97 JB |
4997 | prev = vector, vector = vector->next; |
4998 | } | |
4999 | } | |
676a7251 GM |
5000 | |
5001 | #ifdef GC_CHECK_STRING_BYTES | |
5002 | if (!noninteractive) | |
5003 | check_string_bytes (1); | |
5004 | #endif | |
7146af97 | 5005 | } |
7146af97 | 5006 | |
7146af97 | 5007 | |
7146af97 | 5008 | |
7146af97 | 5009 | \f |
20d24714 JB |
5010 | /* Debugging aids. */ |
5011 | ||
31ce1c91 | 5012 | DEFUN ("memory-limit", Fmemory_limit, Smemory_limit, 0, 0, 0, |
20d24714 JB |
5013 | "Return the address of the last byte Emacs has allocated, divided by 1024.\n\ |
5014 | This may be helpful in debugging Emacs's memory usage.\n\ | |
e41ae81f | 5015 | We divide the value by 1024 to make sure it fits in a Lisp integer.") |
20d24714 JB |
5016 | () |
5017 | { | |
5018 | Lisp_Object end; | |
5019 | ||
45d12a89 | 5020 | XSETINT (end, (EMACS_INT) sbrk (0) / 1024); |
20d24714 JB |
5021 | |
5022 | return end; | |
5023 | } | |
5024 | ||
310ea200 RS |
5025 | DEFUN ("memory-use-counts", Fmemory_use_counts, Smemory_use_counts, 0, 0, 0, |
5026 | "Return a list of counters that measure how much consing there has been.\n\ | |
5027 | Each of these counters increments for a certain kind of object.\n\ | |
5028 | The counters wrap around from the largest positive integer to zero.\n\ | |
5029 | Garbage collection does not decrease them.\n\ | |
5030 | The elements of the value are as follows:\n\ | |
2e471eb5 | 5031 | (CONSES FLOATS VECTOR-CELLS SYMBOLS STRING-CHARS MISCS INTERVALS STRINGS)\n\ |
310ea200 RS |
5032 | All are in units of 1 = one object consed\n\ |
5033 | except for VECTOR-CELLS and STRING-CHARS, which count the total length of\n\ | |
5034 | objects consed.\n\ | |
5035 | MISCS include overlays, markers, and some internal types.\n\ | |
5036 | Frames, windows, buffers, and subprocesses count as vectors\n\ | |
5037 | (but the contents of a buffer's text do not count here).") | |
5038 | () | |
5039 | { | |
2e471eb5 | 5040 | Lisp_Object consed[8]; |
310ea200 | 5041 | |
2e471eb5 | 5042 | XSETINT (consed[0], |
290c8f1e | 5043 | cons_cells_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
2e471eb5 | 5044 | XSETINT (consed[1], |
290c8f1e | 5045 | floats_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
2e471eb5 | 5046 | XSETINT (consed[2], |
290c8f1e | 5047 | vector_cells_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
2e471eb5 | 5048 | XSETINT (consed[3], |
290c8f1e | 5049 | symbols_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
2e471eb5 | 5050 | XSETINT (consed[4], |
290c8f1e | 5051 | string_chars_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
2e471eb5 | 5052 | XSETINT (consed[5], |
290c8f1e | 5053 | misc_objects_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
2e471eb5 | 5054 | XSETINT (consed[6], |
290c8f1e | 5055 | intervals_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); |
2e471eb5 GM |
5056 | XSETINT (consed[7], |
5057 | strings_consed & ~(((EMACS_INT) 1) << (VALBITS - 1))); | |
310ea200 | 5058 | |
2e471eb5 | 5059 | return Flist (8, consed); |
310ea200 | 5060 | } |
e0b8c689 KR |
5061 | |
5062 | int suppress_checking; | |
5063 | void | |
5064 | die (msg, file, line) | |
5065 | const char *msg; | |
5066 | const char *file; | |
5067 | int line; | |
5068 | { | |
5069 | fprintf (stderr, "\r\nEmacs fatal error: %s:%d: %s\r\n", | |
5070 | file, line, msg); | |
5071 | abort (); | |
5072 | } | |
20d24714 | 5073 | \f |
7146af97 JB |
5074 | /* Initialization */ |
5075 | ||
dfcf069d | 5076 | void |
7146af97 JB |
5077 | init_alloc_once () |
5078 | { | |
5079 | /* Used to do Vpurify_flag = Qt here, but Qt isn't set up yet! */ | |
1f0b3fd2 | 5080 | pure_bytes_used = 0; |
877935b1 | 5081 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
34400008 GM |
5082 | mem_init (); |
5083 | Vdead = make_pure_string ("DEAD", 4, 4, 0); | |
5084 | #endif | |
4c0be5f4 JB |
5085 | #ifdef HAVE_SHM |
5086 | pure_size = PURESIZE; | |
5087 | #endif | |
7146af97 JB |
5088 | all_vectors = 0; |
5089 | ignore_warnings = 1; | |
d1658221 RS |
5090 | #ifdef DOUG_LEA_MALLOC |
5091 | mallopt (M_TRIM_THRESHOLD, 128*1024); /* trim threshold */ | |
5092 | mallopt (M_MMAP_THRESHOLD, 64*1024); /* mmap threshold */ | |
81d492d5 | 5093 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); /* max. number of mmap'ed areas */ |
d1658221 | 5094 | #endif |
7146af97 JB |
5095 | init_strings (); |
5096 | init_cons (); | |
5097 | init_symbol (); | |
5098 | init_marker (); | |
7146af97 | 5099 | init_float (); |
34400008 | 5100 | init_intervals (); |
d5e35230 | 5101 | |
276cbe5a RS |
5102 | #ifdef REL_ALLOC |
5103 | malloc_hysteresis = 32; | |
5104 | #else | |
5105 | malloc_hysteresis = 0; | |
5106 | #endif | |
5107 | ||
5108 | spare_memory = (char *) malloc (SPARE_MEMORY); | |
5109 | ||
7146af97 JB |
5110 | ignore_warnings = 0; |
5111 | gcprolist = 0; | |
630686c8 | 5112 | byte_stack_list = 0; |
7146af97 JB |
5113 | staticidx = 0; |
5114 | consing_since_gc = 0; | |
7d179cea | 5115 | gc_cons_threshold = 100000 * sizeof (Lisp_Object); |
7146af97 JB |
5116 | #ifdef VIRT_ADDR_VARIES |
5117 | malloc_sbrk_unused = 1<<22; /* A large number */ | |
5118 | malloc_sbrk_used = 100000; /* as reasonable as any number */ | |
5119 | #endif /* VIRT_ADDR_VARIES */ | |
5120 | } | |
5121 | ||
dfcf069d | 5122 | void |
7146af97 JB |
5123 | init_alloc () |
5124 | { | |
5125 | gcprolist = 0; | |
630686c8 | 5126 | byte_stack_list = 0; |
182ff242 GM |
5127 | #if GC_MARK_STACK |
5128 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
5129 | setjmp_tested_p = longjmps_done = 0; | |
5130 | #endif | |
5131 | #endif | |
7146af97 JB |
5132 | } |
5133 | ||
5134 | void | |
5135 | syms_of_alloc () | |
5136 | { | |
5137 | DEFVAR_INT ("gc-cons-threshold", &gc_cons_threshold, | |
5138 | "*Number of bytes of consing between garbage collections.\n\ | |
5139 | Garbage collection can happen automatically once this many bytes have been\n\ | |
5140 | allocated since the last garbage collection. All data types count.\n\n\ | |
5141 | Garbage collection happens automatically only when `eval' is called.\n\n\ | |
5142 | By binding this temporarily to a large number, you can effectively\n\ | |
5143 | prevent garbage collection during a part of the program."); | |
5144 | ||
1f0b3fd2 | 5145 | DEFVAR_INT ("pure-bytes-used", &pure_bytes_used, |
7146af97 JB |
5146 | "Number of bytes of sharable Lisp data allocated so far."); |
5147 | ||
0819585c RS |
5148 | DEFVAR_INT ("cons-cells-consed", &cons_cells_consed, |
5149 | "Number of cons cells that have been consed so far."); | |
5150 | ||
5151 | DEFVAR_INT ("floats-consed", &floats_consed, | |
5152 | "Number of floats that have been consed so far."); | |
5153 | ||
5154 | DEFVAR_INT ("vector-cells-consed", &vector_cells_consed, | |
5155 | "Number of vector cells that have been consed so far."); | |
5156 | ||
5157 | DEFVAR_INT ("symbols-consed", &symbols_consed, | |
5158 | "Number of symbols that have been consed so far."); | |
5159 | ||
5160 | DEFVAR_INT ("string-chars-consed", &string_chars_consed, | |
5161 | "Number of string characters that have been consed so far."); | |
5162 | ||
5163 | DEFVAR_INT ("misc-objects-consed", &misc_objects_consed, | |
5164 | "Number of miscellaneous objects that have been consed so far."); | |
5165 | ||
5166 | DEFVAR_INT ("intervals-consed", &intervals_consed, | |
5167 | "Number of intervals that have been consed so far."); | |
5168 | ||
2e471eb5 GM |
5169 | DEFVAR_INT ("strings-consed", &strings_consed, |
5170 | "Number of strings that have been consed so far."); | |
5171 | ||
7146af97 JB |
5172 | DEFVAR_LISP ("purify-flag", &Vpurify_flag, |
5173 | "Non-nil means loading Lisp code in order to dump an executable.\n\ | |
5174 | This means that certain objects should be allocated in shared (pure) space."); | |
5175 | ||
502b9b64 | 5176 | DEFVAR_INT ("undo-limit", &undo_limit, |
7146af97 | 5177 | "Keep no more undo information once it exceeds this size.\n\ |
502b9b64 | 5178 | This limit is applied when garbage collection happens.\n\ |
7146af97 JB |
5179 | The size is counted as the number of bytes occupied,\n\ |
5180 | which includes both saved text and other data."); | |
502b9b64 | 5181 | undo_limit = 20000; |
7146af97 | 5182 | |
502b9b64 | 5183 | DEFVAR_INT ("undo-strong-limit", &undo_strong_limit, |
7146af97 JB |
5184 | "Don't keep more than this much size of undo information.\n\ |
5185 | A command which pushes past this size is itself forgotten.\n\ | |
502b9b64 | 5186 | This limit is applied when garbage collection happens.\n\ |
7146af97 JB |
5187 | The size is counted as the number of bytes occupied,\n\ |
5188 | which includes both saved text and other data."); | |
502b9b64 | 5189 | undo_strong_limit = 30000; |
7146af97 | 5190 | |
299585ee RS |
5191 | DEFVAR_BOOL ("garbage-collection-messages", &garbage_collection_messages, |
5192 | "Non-nil means display messages at start and end of garbage collection."); | |
5193 | garbage_collection_messages = 0; | |
5194 | ||
bcb61d60 KH |
5195 | /* We build this in advance because if we wait until we need it, we might |
5196 | not be able to allocate the memory to hold it. */ | |
cf3540e4 | 5197 | memory_signal_data |
276cbe5a | 5198 | = Fcons (Qerror, Fcons (build_string ("Memory exhausted--use M-x save-some-buffers RET"), Qnil)); |
bcb61d60 KH |
5199 | staticpro (&memory_signal_data); |
5200 | ||
e8197642 RS |
5201 | staticpro (&Qgc_cons_threshold); |
5202 | Qgc_cons_threshold = intern ("gc-cons-threshold"); | |
5203 | ||
a59de17b RS |
5204 | staticpro (&Qchar_table_extra_slots); |
5205 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
5206 | ||
7146af97 JB |
5207 | defsubr (&Scons); |
5208 | defsubr (&Slist); | |
5209 | defsubr (&Svector); | |
5210 | defsubr (&Smake_byte_code); | |
5211 | defsubr (&Smake_list); | |
5212 | defsubr (&Smake_vector); | |
7b07587b | 5213 | defsubr (&Smake_char_table); |
7146af97 | 5214 | defsubr (&Smake_string); |
7b07587b | 5215 | defsubr (&Smake_bool_vector); |
7146af97 JB |
5216 | defsubr (&Smake_symbol); |
5217 | defsubr (&Smake_marker); | |
5218 | defsubr (&Spurecopy); | |
5219 | defsubr (&Sgarbage_collect); | |
20d24714 | 5220 | defsubr (&Smemory_limit); |
310ea200 | 5221 | defsubr (&Smemory_use_counts); |
34400008 GM |
5222 | |
5223 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
5224 | defsubr (&Sgc_status); | |
5225 | #endif | |
7146af97 | 5226 | } |