Commit | Line | Data |
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7146af97 | 1 | /* Storage allocation and gc for GNU Emacs Lisp interpreter. |
d05b383a | 2 | Copyright (C) 1985,86,88,93,94,95,97,98,1999,2000,01,02,03,2004 |
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> |
ab6780cd | 24 | #include <limits.h> /* For CHAR_BIT. */ |
92939d31 | 25 | |
4455ad75 RS |
26 | #ifdef ALLOC_DEBUG |
27 | #undef INLINE | |
28 | #endif | |
29 | ||
68c45bf0 | 30 | /* Note that this declares bzero on OSF/1. How dumb. */ |
2e471eb5 | 31 | |
68c45bf0 | 32 | #include <signal.h> |
92939d31 | 33 | |
7539e11f KR |
34 | /* This file is part of the core Lisp implementation, and thus must |
35 | deal with the real data structures. If the Lisp implementation is | |
36 | replaced, this file likely will not be used. */ | |
2e471eb5 | 37 | |
7539e11f | 38 | #undef HIDE_LISP_IMPLEMENTATION |
7146af97 | 39 | #include "lisp.h" |
ece93c02 | 40 | #include "process.h" |
d5e35230 | 41 | #include "intervals.h" |
4c0be5f4 | 42 | #include "puresize.h" |
7146af97 JB |
43 | #include "buffer.h" |
44 | #include "window.h" | |
2538fae4 | 45 | #include "keyboard.h" |
502b9b64 | 46 | #include "frame.h" |
9ac0d9e0 | 47 | #include "blockinput.h" |
e54daa22 | 48 | #include "charset.h" |
e065a56e | 49 | #include "syssignal.h" |
34400008 | 50 | #include <setjmp.h> |
e065a56e | 51 | |
ad5f3636 DL |
52 | /* GC_MALLOC_CHECK defined means perform validity checks of malloc'd |
53 | memory. Can do this only if using gmalloc.c. */ | |
54 | ||
55 | #if defined SYSTEM_MALLOC || defined DOUG_LEA_MALLOC | |
56 | #undef GC_MALLOC_CHECK | |
57 | #endif | |
58 | ||
bf952fb6 DL |
59 | #ifdef HAVE_UNISTD_H |
60 | #include <unistd.h> | |
61 | #else | |
62 | extern POINTER_TYPE *sbrk (); | |
63 | #endif | |
ee1eea5c | 64 | |
d1658221 | 65 | #ifdef DOUG_LEA_MALLOC |
2e471eb5 | 66 | |
d1658221 | 67 | #include <malloc.h> |
3e60b029 DL |
68 | /* malloc.h #defines this as size_t, at least in glibc2. */ |
69 | #ifndef __malloc_size_t | |
d1658221 | 70 | #define __malloc_size_t int |
3e60b029 | 71 | #endif |
81d492d5 | 72 | |
2e471eb5 GM |
73 | /* Specify maximum number of areas to mmap. It would be nice to use a |
74 | value that explicitly means "no limit". */ | |
75 | ||
81d492d5 RS |
76 | #define MMAP_MAX_AREAS 100000000 |
77 | ||
2e471eb5 GM |
78 | #else /* not DOUG_LEA_MALLOC */ |
79 | ||
276cbe5a RS |
80 | /* The following come from gmalloc.c. */ |
81 | ||
276cbe5a | 82 | #define __malloc_size_t size_t |
276cbe5a | 83 | extern __malloc_size_t _bytes_used; |
3e60b029 | 84 | extern __malloc_size_t __malloc_extra_blocks; |
2e471eb5 GM |
85 | |
86 | #endif /* not DOUG_LEA_MALLOC */ | |
276cbe5a | 87 | |
276cbe5a | 88 | /* Value of _bytes_used, when spare_memory was freed. */ |
2e471eb5 | 89 | |
276cbe5a RS |
90 | static __malloc_size_t bytes_used_when_full; |
91 | ||
2e471eb5 GM |
92 | /* Mark, unmark, query mark bit of a Lisp string. S must be a pointer |
93 | to a struct Lisp_String. */ | |
94 | ||
7cdee936 SM |
95 | #define MARK_STRING(S) ((S)->size |= ARRAY_MARK_FLAG) |
96 | #define UNMARK_STRING(S) ((S)->size &= ~ARRAY_MARK_FLAG) | |
97 | #define STRING_MARKED_P(S) ((S)->size & ARRAY_MARK_FLAG) | |
2e471eb5 | 98 | |
3ef06d12 SM |
99 | #define VECTOR_MARK(V) ((V)->size |= ARRAY_MARK_FLAG) |
100 | #define VECTOR_UNMARK(V) ((V)->size &= ~ARRAY_MARK_FLAG) | |
101 | #define VECTOR_MARKED_P(V) ((V)->size & ARRAY_MARK_FLAG) | |
102 | ||
2e471eb5 GM |
103 | /* Value is the number of bytes/chars of S, a pointer to a struct |
104 | Lisp_String. This must be used instead of STRING_BYTES (S) or | |
105 | S->size during GC, because S->size contains the mark bit for | |
106 | strings. */ | |
107 | ||
3ef06d12 | 108 | #define GC_STRING_BYTES(S) (STRING_BYTES (S)) |
7cdee936 | 109 | #define GC_STRING_CHARS(S) ((S)->size & ~ARRAY_MARK_FLAG) |
2e471eb5 GM |
110 | |
111 | /* Number of bytes of consing done since the last gc. */ | |
112 | ||
7146af97 JB |
113 | int consing_since_gc; |
114 | ||
310ea200 | 115 | /* Count the amount of consing of various sorts of space. */ |
2e471eb5 | 116 | |
31ade731 SM |
117 | EMACS_INT cons_cells_consed; |
118 | EMACS_INT floats_consed; | |
119 | EMACS_INT vector_cells_consed; | |
120 | EMACS_INT symbols_consed; | |
121 | EMACS_INT string_chars_consed; | |
122 | EMACS_INT misc_objects_consed; | |
123 | EMACS_INT intervals_consed; | |
124 | EMACS_INT strings_consed; | |
2e471eb5 GM |
125 | |
126 | /* Number of bytes of consing since GC before another GC should be done. */ | |
310ea200 | 127 | |
31ade731 | 128 | EMACS_INT gc_cons_threshold; |
7146af97 | 129 | |
2e471eb5 GM |
130 | /* Nonzero during GC. */ |
131 | ||
7146af97 JB |
132 | int gc_in_progress; |
133 | ||
3de0effb RS |
134 | /* Nonzero means abort if try to GC. |
135 | This is for code which is written on the assumption that | |
136 | no GC will happen, so as to verify that assumption. */ | |
137 | ||
138 | int abort_on_gc; | |
139 | ||
299585ee | 140 | /* Nonzero means display messages at beginning and end of GC. */ |
2e471eb5 | 141 | |
299585ee RS |
142 | int garbage_collection_messages; |
143 | ||
7146af97 JB |
144 | #ifndef VIRT_ADDR_VARIES |
145 | extern | |
146 | #endif /* VIRT_ADDR_VARIES */ | |
2e471eb5 | 147 | int malloc_sbrk_used; |
7146af97 JB |
148 | |
149 | #ifndef VIRT_ADDR_VARIES | |
150 | extern | |
151 | #endif /* VIRT_ADDR_VARIES */ | |
2e471eb5 | 152 | int malloc_sbrk_unused; |
7146af97 | 153 | |
502b9b64 | 154 | /* Two limits controlling how much undo information to keep. */ |
2e471eb5 | 155 | |
31ade731 SM |
156 | EMACS_INT undo_limit; |
157 | EMACS_INT undo_strong_limit; | |
7146af97 | 158 | |
34400008 GM |
159 | /* Number of live and free conses etc. */ |
160 | ||
161 | static int total_conses, total_markers, total_symbols, total_vector_size; | |
162 | static int total_free_conses, total_free_markers, total_free_symbols; | |
163 | static int total_free_floats, total_floats; | |
fd27a537 | 164 | |
2e471eb5 GM |
165 | /* Points to memory space allocated as "spare", to be freed if we run |
166 | out of memory. */ | |
167 | ||
276cbe5a RS |
168 | static char *spare_memory; |
169 | ||
170 | /* Amount of spare memory to keep in reserve. */ | |
2e471eb5 | 171 | |
276cbe5a RS |
172 | #define SPARE_MEMORY (1 << 14) |
173 | ||
174 | /* Number of extra blocks malloc should get when it needs more core. */ | |
2e471eb5 | 175 | |
276cbe5a RS |
176 | static int malloc_hysteresis; |
177 | ||
2e471eb5 GM |
178 | /* Non-nil means defun should do purecopy on the function definition. */ |
179 | ||
7146af97 JB |
180 | Lisp_Object Vpurify_flag; |
181 | ||
74a54b04 RS |
182 | /* Non-nil means we are handling a memory-full error. */ |
183 | ||
184 | Lisp_Object Vmemory_full; | |
185 | ||
7146af97 | 186 | #ifndef HAVE_SHM |
2e471eb5 | 187 | |
379b98b1 PE |
188 | /* Force it into data space! Initialize it to a nonzero value; |
189 | otherwise some compilers put it into BSS. */ | |
2e471eb5 | 190 | |
379b98b1 | 191 | EMACS_INT pure[PURESIZE / sizeof (EMACS_INT)] = {1,}; |
7146af97 | 192 | #define PUREBEG (char *) pure |
2e471eb5 | 193 | |
9e713715 | 194 | #else /* HAVE_SHM */ |
2e471eb5 | 195 | |
7146af97 JB |
196 | #define pure PURE_SEG_BITS /* Use shared memory segment */ |
197 | #define PUREBEG (char *)PURE_SEG_BITS | |
4c0be5f4 | 198 | |
9e713715 | 199 | #endif /* HAVE_SHM */ |
2e471eb5 | 200 | |
9e713715 | 201 | /* Pointer to the pure area, and its size. */ |
2e471eb5 | 202 | |
9e713715 GM |
203 | static char *purebeg; |
204 | static size_t pure_size; | |
205 | ||
206 | /* Number of bytes of pure storage used before pure storage overflowed. | |
207 | If this is non-zero, this implies that an overflow occurred. */ | |
208 | ||
209 | static size_t pure_bytes_used_before_overflow; | |
7146af97 | 210 | |
34400008 GM |
211 | /* Value is non-zero if P points into pure space. */ |
212 | ||
213 | #define PURE_POINTER_P(P) \ | |
214 | (((PNTR_COMPARISON_TYPE) (P) \ | |
9e713715 | 215 | < (PNTR_COMPARISON_TYPE) ((char *) purebeg + pure_size)) \ |
34400008 | 216 | && ((PNTR_COMPARISON_TYPE) (P) \ |
9e713715 | 217 | >= (PNTR_COMPARISON_TYPE) purebeg)) |
34400008 | 218 | |
2e471eb5 GM |
219 | /* Index in pure at which next pure object will be allocated.. */ |
220 | ||
31ade731 | 221 | EMACS_INT pure_bytes_used; |
7146af97 | 222 | |
2e471eb5 GM |
223 | /* If nonzero, this is a warning delivered by malloc and not yet |
224 | displayed. */ | |
225 | ||
7146af97 JB |
226 | char *pending_malloc_warning; |
227 | ||
bcb61d60 | 228 | /* Pre-computed signal argument for use when memory is exhausted. */ |
2e471eb5 | 229 | |
74a54b04 | 230 | Lisp_Object Vmemory_signal_data; |
bcb61d60 | 231 | |
7146af97 JB |
232 | /* Maximum amount of C stack to save when a GC happens. */ |
233 | ||
234 | #ifndef MAX_SAVE_STACK | |
235 | #define MAX_SAVE_STACK 16000 | |
236 | #endif | |
237 | ||
238 | /* Buffer in which we save a copy of the C stack at each GC. */ | |
239 | ||
240 | char *stack_copy; | |
241 | int stack_copy_size; | |
242 | ||
2e471eb5 GM |
243 | /* Non-zero means ignore malloc warnings. Set during initialization. |
244 | Currently not used. */ | |
245 | ||
7146af97 | 246 | int ignore_warnings; |
350273a4 | 247 | |
a59de17b | 248 | Lisp_Object Qgc_cons_threshold, Qchar_table_extra_slots; |
e8197642 | 249 | |
9e713715 GM |
250 | /* Hook run after GC has finished. */ |
251 | ||
252 | Lisp_Object Vpost_gc_hook, Qpost_gc_hook; | |
253 | ||
2c5bd608 DL |
254 | Lisp_Object Vgc_elapsed; /* accumulated elapsed time in GC */ |
255 | EMACS_INT gcs_done; /* accumulated GCs */ | |
256 | ||
2e471eb5 | 257 | static void mark_buffer P_ ((Lisp_Object)); |
6793bc63 | 258 | extern void mark_kboards P_ ((void)); |
b40ea20a | 259 | extern void mark_backtrace P_ ((void)); |
2e471eb5 | 260 | static void gc_sweep P_ ((void)); |
41c28a37 GM |
261 | static void mark_glyph_matrix P_ ((struct glyph_matrix *)); |
262 | static void mark_face_cache P_ ((struct face_cache *)); | |
263 | ||
264 | #ifdef HAVE_WINDOW_SYSTEM | |
265 | static void mark_image P_ ((struct image *)); | |
266 | static void mark_image_cache P_ ((struct frame *)); | |
267 | #endif /* HAVE_WINDOW_SYSTEM */ | |
268 | ||
2e471eb5 GM |
269 | static struct Lisp_String *allocate_string P_ ((void)); |
270 | static void compact_small_strings P_ ((void)); | |
271 | static void free_large_strings P_ ((void)); | |
272 | static void sweep_strings P_ ((void)); | |
7da0b0d3 RS |
273 | |
274 | extern int message_enable_multibyte; | |
34400008 | 275 | |
34400008 GM |
276 | /* When scanning the C stack for live Lisp objects, Emacs keeps track |
277 | of what memory allocated via lisp_malloc is intended for what | |
278 | purpose. This enumeration specifies the type of memory. */ | |
279 | ||
280 | enum mem_type | |
281 | { | |
282 | MEM_TYPE_NON_LISP, | |
283 | MEM_TYPE_BUFFER, | |
284 | MEM_TYPE_CONS, | |
285 | MEM_TYPE_STRING, | |
286 | MEM_TYPE_MISC, | |
287 | MEM_TYPE_SYMBOL, | |
288 | MEM_TYPE_FLOAT, | |
ece93c02 GM |
289 | /* Keep the following vector-like types together, with |
290 | MEM_TYPE_WINDOW being the last, and MEM_TYPE_VECTOR the | |
291 | first. Or change the code of live_vector_p, for instance. */ | |
292 | MEM_TYPE_VECTOR, | |
293 | MEM_TYPE_PROCESS, | |
294 | MEM_TYPE_HASH_TABLE, | |
295 | MEM_TYPE_FRAME, | |
296 | MEM_TYPE_WINDOW | |
34400008 GM |
297 | }; |
298 | ||
877935b1 | 299 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
0b378936 GM |
300 | |
301 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
302 | #include <stdio.h> /* For fprintf. */ | |
303 | #endif | |
304 | ||
305 | /* A unique object in pure space used to make some Lisp objects | |
306 | on free lists recognizable in O(1). */ | |
307 | ||
308 | Lisp_Object Vdead; | |
309 | ||
877935b1 GM |
310 | #ifdef GC_MALLOC_CHECK |
311 | ||
312 | enum mem_type allocated_mem_type; | |
313 | int dont_register_blocks; | |
314 | ||
315 | #endif /* GC_MALLOC_CHECK */ | |
316 | ||
317 | /* A node in the red-black tree describing allocated memory containing | |
318 | Lisp data. Each such block is recorded with its start and end | |
319 | address when it is allocated, and removed from the tree when it | |
320 | is freed. | |
321 | ||
322 | A red-black tree is a balanced binary tree with the following | |
323 | properties: | |
324 | ||
325 | 1. Every node is either red or black. | |
326 | 2. Every leaf is black. | |
327 | 3. If a node is red, then both of its children are black. | |
328 | 4. Every simple path from a node to a descendant leaf contains | |
329 | the same number of black nodes. | |
330 | 5. The root is always black. | |
331 | ||
332 | When nodes are inserted into the tree, or deleted from the tree, | |
333 | the tree is "fixed" so that these properties are always true. | |
334 | ||
335 | A red-black tree with N internal nodes has height at most 2 | |
336 | log(N+1). Searches, insertions and deletions are done in O(log N). | |
337 | Please see a text book about data structures for a detailed | |
338 | description of red-black trees. Any book worth its salt should | |
339 | describe them. */ | |
340 | ||
341 | struct mem_node | |
342 | { | |
9f7d9210 RS |
343 | /* Children of this node. These pointers are never NULL. When there |
344 | is no child, the value is MEM_NIL, which points to a dummy node. */ | |
345 | struct mem_node *left, *right; | |
346 | ||
347 | /* The parent of this node. In the root node, this is NULL. */ | |
348 | struct mem_node *parent; | |
877935b1 GM |
349 | |
350 | /* Start and end of allocated region. */ | |
351 | void *start, *end; | |
352 | ||
353 | /* Node color. */ | |
354 | enum {MEM_BLACK, MEM_RED} color; | |
177c0ea7 | 355 | |
877935b1 GM |
356 | /* Memory type. */ |
357 | enum mem_type type; | |
358 | }; | |
359 | ||
360 | /* Base address of stack. Set in main. */ | |
361 | ||
362 | Lisp_Object *stack_base; | |
363 | ||
364 | /* Root of the tree describing allocated Lisp memory. */ | |
365 | ||
366 | static struct mem_node *mem_root; | |
367 | ||
ece93c02 GM |
368 | /* Lowest and highest known address in the heap. */ |
369 | ||
370 | static void *min_heap_address, *max_heap_address; | |
371 | ||
877935b1 GM |
372 | /* Sentinel node of the tree. */ |
373 | ||
374 | static struct mem_node mem_z; | |
375 | #define MEM_NIL &mem_z | |
376 | ||
b3303f74 | 377 | static POINTER_TYPE *lisp_malloc P_ ((size_t, enum mem_type)); |
ece93c02 | 378 | static struct Lisp_Vector *allocate_vectorlike P_ ((EMACS_INT, enum mem_type)); |
bf952fb6 | 379 | static void lisp_free P_ ((POINTER_TYPE *)); |
34400008 | 380 | static void mark_stack P_ ((void)); |
34400008 GM |
381 | static int live_vector_p P_ ((struct mem_node *, void *)); |
382 | static int live_buffer_p P_ ((struct mem_node *, void *)); | |
383 | static int live_string_p P_ ((struct mem_node *, void *)); | |
384 | static int live_cons_p P_ ((struct mem_node *, void *)); | |
385 | static int live_symbol_p P_ ((struct mem_node *, void *)); | |
386 | static int live_float_p P_ ((struct mem_node *, void *)); | |
387 | static int live_misc_p P_ ((struct mem_node *, void *)); | |
182ff242 | 388 | static void mark_maybe_object P_ ((Lisp_Object)); |
34400008 GM |
389 | static void mark_memory P_ ((void *, void *)); |
390 | static void mem_init P_ ((void)); | |
391 | static struct mem_node *mem_insert P_ ((void *, void *, enum mem_type)); | |
392 | static void mem_insert_fixup P_ ((struct mem_node *)); | |
393 | static void mem_rotate_left P_ ((struct mem_node *)); | |
394 | static void mem_rotate_right P_ ((struct mem_node *)); | |
395 | static void mem_delete P_ ((struct mem_node *)); | |
396 | static void mem_delete_fixup P_ ((struct mem_node *)); | |
397 | static INLINE struct mem_node *mem_find P_ ((void *)); | |
398 | ||
399 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
400 | static void check_gcpros P_ ((void)); | |
401 | #endif | |
402 | ||
877935b1 | 403 | #endif /* GC_MARK_STACK || GC_MALLOC_CHECK */ |
34400008 | 404 | |
1f0b3fd2 GM |
405 | /* Recording what needs to be marked for gc. */ |
406 | ||
407 | struct gcpro *gcprolist; | |
408 | ||
379b98b1 PE |
409 | /* Addresses of staticpro'd variables. Initialize it to a nonzero |
410 | value; otherwise some compilers put it into BSS. */ | |
1f0b3fd2 | 411 | |
382d38fa | 412 | #define NSTATICS 1280 |
379b98b1 | 413 | Lisp_Object *staticvec[NSTATICS] = {&Vpurify_flag}; |
1f0b3fd2 GM |
414 | |
415 | /* Index of next unused slot in staticvec. */ | |
416 | ||
417 | int staticidx = 0; | |
418 | ||
419 | static POINTER_TYPE *pure_alloc P_ ((size_t, int)); | |
420 | ||
421 | ||
422 | /* Value is SZ rounded up to the next multiple of ALIGNMENT. | |
423 | ALIGNMENT must be a power of 2. */ | |
424 | ||
ab6780cd SM |
425 | #define ALIGN(ptr, ALIGNMENT) \ |
426 | ((POINTER_TYPE *) ((((EMACS_UINT)(ptr)) + (ALIGNMENT) - 1) \ | |
427 | & ~((ALIGNMENT) - 1))) | |
1f0b3fd2 | 428 | |
ece93c02 | 429 | |
7146af97 | 430 | \f |
34400008 GM |
431 | /************************************************************************ |
432 | Malloc | |
433 | ************************************************************************/ | |
434 | ||
4455ad75 | 435 | /* Function malloc calls this if it finds we are near exhausting storage. */ |
d457598b AS |
436 | |
437 | void | |
7146af97 JB |
438 | malloc_warning (str) |
439 | char *str; | |
440 | { | |
441 | pending_malloc_warning = str; | |
442 | } | |
443 | ||
34400008 | 444 | |
4455ad75 | 445 | /* Display an already-pending malloc warning. */ |
34400008 | 446 | |
d457598b | 447 | void |
7146af97 JB |
448 | display_malloc_warning () |
449 | { | |
4455ad75 RS |
450 | call3 (intern ("display-warning"), |
451 | intern ("alloc"), | |
452 | build_string (pending_malloc_warning), | |
453 | intern ("emergency")); | |
7146af97 | 454 | pending_malloc_warning = 0; |
7146af97 JB |
455 | } |
456 | ||
34400008 | 457 | |
d1658221 | 458 | #ifdef DOUG_LEA_MALLOC |
1177ecf6 | 459 | # define BYTES_USED (mallinfo ().arena) |
d1658221 | 460 | #else |
1177ecf6 | 461 | # define BYTES_USED _bytes_used |
d1658221 RS |
462 | #endif |
463 | ||
34400008 | 464 | |
2e471eb5 | 465 | /* Called if malloc returns zero. */ |
276cbe5a | 466 | |
d457598b | 467 | void |
7146af97 JB |
468 | memory_full () |
469 | { | |
74a54b04 RS |
470 | Vmemory_full = Qt; |
471 | ||
276cbe5a | 472 | #ifndef SYSTEM_MALLOC |
d1658221 | 473 | bytes_used_when_full = BYTES_USED; |
276cbe5a RS |
474 | #endif |
475 | ||
476 | /* The first time we get here, free the spare memory. */ | |
477 | if (spare_memory) | |
478 | { | |
479 | free (spare_memory); | |
480 | spare_memory = 0; | |
481 | } | |
482 | ||
2e471eb5 GM |
483 | /* This used to call error, but if we've run out of memory, we could |
484 | get infinite recursion trying to build the string. */ | |
276cbe5a | 485 | while (1) |
74a54b04 | 486 | Fsignal (Qnil, Vmemory_signal_data); |
276cbe5a RS |
487 | } |
488 | ||
34400008 | 489 | |
276cbe5a RS |
490 | /* Called if we can't allocate relocatable space for a buffer. */ |
491 | ||
492 | void | |
493 | buffer_memory_full () | |
494 | { | |
2e471eb5 GM |
495 | /* If buffers use the relocating allocator, no need to free |
496 | spare_memory, because we may have plenty of malloc space left | |
497 | that we could get, and if we don't, the malloc that fails will | |
498 | itself cause spare_memory to be freed. If buffers don't use the | |
499 | relocating allocator, treat this like any other failing | |
500 | malloc. */ | |
276cbe5a RS |
501 | |
502 | #ifndef REL_ALLOC | |
503 | memory_full (); | |
504 | #endif | |
505 | ||
74a54b04 RS |
506 | Vmemory_full = Qt; |
507 | ||
2e471eb5 GM |
508 | /* This used to call error, but if we've run out of memory, we could |
509 | get infinite recursion trying to build the string. */ | |
bcb61d60 | 510 | while (1) |
74a54b04 | 511 | Fsignal (Qnil, Vmemory_signal_data); |
7146af97 JB |
512 | } |
513 | ||
34400008 GM |
514 | |
515 | /* Like malloc but check for no memory and block interrupt input.. */ | |
7146af97 | 516 | |
c971ff9a | 517 | POINTER_TYPE * |
7146af97 | 518 | xmalloc (size) |
675d5130 | 519 | size_t size; |
7146af97 | 520 | { |
c971ff9a | 521 | register POINTER_TYPE *val; |
7146af97 | 522 | |
9ac0d9e0 | 523 | BLOCK_INPUT; |
c971ff9a | 524 | val = (POINTER_TYPE *) malloc (size); |
9ac0d9e0 | 525 | UNBLOCK_INPUT; |
7146af97 | 526 | |
2e471eb5 GM |
527 | if (!val && size) |
528 | memory_full (); | |
7146af97 JB |
529 | return val; |
530 | } | |
531 | ||
34400008 GM |
532 | |
533 | /* Like realloc but check for no memory and block interrupt input.. */ | |
534 | ||
c971ff9a | 535 | POINTER_TYPE * |
7146af97 | 536 | xrealloc (block, size) |
c971ff9a | 537 | POINTER_TYPE *block; |
675d5130 | 538 | size_t size; |
7146af97 | 539 | { |
c971ff9a | 540 | register POINTER_TYPE *val; |
7146af97 | 541 | |
9ac0d9e0 | 542 | BLOCK_INPUT; |
56d2031b JB |
543 | /* We must call malloc explicitly when BLOCK is 0, since some |
544 | reallocs don't do this. */ | |
545 | if (! block) | |
c971ff9a | 546 | val = (POINTER_TYPE *) malloc (size); |
f048679d | 547 | else |
c971ff9a | 548 | val = (POINTER_TYPE *) realloc (block, size); |
9ac0d9e0 | 549 | UNBLOCK_INPUT; |
7146af97 JB |
550 | |
551 | if (!val && size) memory_full (); | |
552 | return val; | |
553 | } | |
9ac0d9e0 | 554 | |
34400008 | 555 | |
d7489312 | 556 | /* Like free but block interrupt input. */ |
34400008 | 557 | |
9ac0d9e0 JB |
558 | void |
559 | xfree (block) | |
c971ff9a | 560 | POINTER_TYPE *block; |
9ac0d9e0 JB |
561 | { |
562 | BLOCK_INPUT; | |
563 | free (block); | |
564 | UNBLOCK_INPUT; | |
565 | } | |
566 | ||
c8099634 | 567 | |
dca7c6a8 GM |
568 | /* Like strdup, but uses xmalloc. */ |
569 | ||
570 | char * | |
571 | xstrdup (s) | |
943b873e | 572 | const char *s; |
dca7c6a8 | 573 | { |
675d5130 | 574 | size_t len = strlen (s) + 1; |
dca7c6a8 GM |
575 | char *p = (char *) xmalloc (len); |
576 | bcopy (s, p, len); | |
577 | return p; | |
578 | } | |
579 | ||
580 | ||
34400008 GM |
581 | /* Like malloc but used for allocating Lisp data. NBYTES is the |
582 | number of bytes to allocate, TYPE describes the intended use of the | |
583 | allcated memory block (for strings, for conses, ...). */ | |
584 | ||
918a23a7 RS |
585 | static void *lisp_malloc_loser; |
586 | ||
675d5130 | 587 | static POINTER_TYPE * |
34400008 | 588 | lisp_malloc (nbytes, type) |
675d5130 | 589 | size_t nbytes; |
34400008 | 590 | enum mem_type type; |
c8099634 | 591 | { |
34400008 | 592 | register void *val; |
c8099634 RS |
593 | |
594 | BLOCK_INPUT; | |
877935b1 GM |
595 | |
596 | #ifdef GC_MALLOC_CHECK | |
597 | allocated_mem_type = type; | |
598 | #endif | |
177c0ea7 | 599 | |
34400008 | 600 | val = (void *) malloc (nbytes); |
c8099634 | 601 | |
831b476c | 602 | #ifndef USE_LSB_TAG |
918a23a7 RS |
603 | /* If the memory just allocated cannot be addressed thru a Lisp |
604 | object's pointer, and it needs to be, | |
605 | that's equivalent to running out of memory. */ | |
606 | if (val && type != MEM_TYPE_NON_LISP) | |
607 | { | |
608 | Lisp_Object tem; | |
609 | XSETCONS (tem, (char *) val + nbytes - 1); | |
610 | if ((char *) XCONS (tem) != (char *) val + nbytes - 1) | |
611 | { | |
612 | lisp_malloc_loser = val; | |
613 | free (val); | |
614 | val = 0; | |
615 | } | |
616 | } | |
831b476c | 617 | #endif |
918a23a7 | 618 | |
877935b1 | 619 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
dca7c6a8 | 620 | if (val && type != MEM_TYPE_NON_LISP) |
34400008 GM |
621 | mem_insert (val, (char *) val + nbytes, type); |
622 | #endif | |
177c0ea7 | 623 | |
dca7c6a8 GM |
624 | UNBLOCK_INPUT; |
625 | if (!val && nbytes) | |
626 | memory_full (); | |
c8099634 RS |
627 | return val; |
628 | } | |
629 | ||
34400008 GM |
630 | /* Free BLOCK. This must be called to free memory allocated with a |
631 | call to lisp_malloc. */ | |
632 | ||
bf952fb6 | 633 | static void |
c8099634 | 634 | lisp_free (block) |
675d5130 | 635 | POINTER_TYPE *block; |
c8099634 RS |
636 | { |
637 | BLOCK_INPUT; | |
c8099634 | 638 | free (block); |
877935b1 | 639 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
34400008 GM |
640 | mem_delete (mem_find (block)); |
641 | #endif | |
c8099634 RS |
642 | UNBLOCK_INPUT; |
643 | } | |
34400008 | 644 | |
ab6780cd SM |
645 | /* Allocation of aligned blocks of memory to store Lisp data. */ |
646 | /* The entry point is lisp_align_malloc which returns blocks of at most */ | |
647 | /* BLOCK_BYTES and guarantees they are aligned on a BLOCK_ALIGN boundary. */ | |
648 | ||
649 | ||
650 | /* BLOCK_ALIGN has to be a power of 2. */ | |
651 | #define BLOCK_ALIGN (1 << 10) | |
ab6780cd SM |
652 | |
653 | /* Padding to leave at the end of a malloc'd block. This is to give | |
654 | malloc a chance to minimize the amount of memory wasted to alignment. | |
655 | It should be tuned to the particular malloc library used. | |
19bcad1f SM |
656 | On glibc-2.3.2, malloc never tries to align, so a padding of 0 is best. |
657 | posix_memalign on the other hand would ideally prefer a value of 4 | |
658 | because otherwise, there's 1020 bytes wasted between each ablocks. | |
659 | But testing shows that those 1020 will most of the time be efficiently | |
660 | used by malloc to place other objects, so a value of 0 is still preferable | |
661 | unless you have a lot of cons&floats and virtually nothing else. */ | |
662 | #define BLOCK_PADDING 0 | |
663 | #define BLOCK_BYTES \ | |
664 | (BLOCK_ALIGN - sizeof (struct aligned_block *) - BLOCK_PADDING) | |
665 | ||
666 | /* Internal data structures and constants. */ | |
667 | ||
ab6780cd SM |
668 | #define ABLOCKS_SIZE 16 |
669 | ||
670 | /* An aligned block of memory. */ | |
671 | struct ablock | |
672 | { | |
673 | union | |
674 | { | |
675 | char payload[BLOCK_BYTES]; | |
676 | struct ablock *next_free; | |
677 | } x; | |
678 | /* `abase' is the aligned base of the ablocks. */ | |
679 | /* It is overloaded to hold the virtual `busy' field that counts | |
680 | the number of used ablock in the parent ablocks. | |
681 | The first ablock has the `busy' field, the others have the `abase' | |
682 | field. To tell the difference, we assume that pointers will have | |
683 | integer values larger than 2 * ABLOCKS_SIZE. The lowest bit of `busy' | |
684 | is used to tell whether the real base of the parent ablocks is `abase' | |
685 | (if not, the word before the first ablock holds a pointer to the | |
686 | real base). */ | |
687 | struct ablocks *abase; | |
688 | /* The padding of all but the last ablock is unused. The padding of | |
689 | the last ablock in an ablocks is not allocated. */ | |
19bcad1f SM |
690 | #if BLOCK_PADDING |
691 | char padding[BLOCK_PADDING]; | |
ebb8d410 | 692 | #endif |
ab6780cd SM |
693 | }; |
694 | ||
695 | /* A bunch of consecutive aligned blocks. */ | |
696 | struct ablocks | |
697 | { | |
698 | struct ablock blocks[ABLOCKS_SIZE]; | |
699 | }; | |
700 | ||
701 | /* Size of the block requested from malloc or memalign. */ | |
19bcad1f | 702 | #define ABLOCKS_BYTES (sizeof (struct ablocks) - BLOCK_PADDING) |
ab6780cd SM |
703 | |
704 | #define ABLOCK_ABASE(block) \ | |
705 | (((unsigned long) (block)->abase) <= (1 + 2 * ABLOCKS_SIZE) \ | |
706 | ? (struct ablocks *)(block) \ | |
707 | : (block)->abase) | |
708 | ||
709 | /* Virtual `busy' field. */ | |
710 | #define ABLOCKS_BUSY(abase) ((abase)->blocks[0].abase) | |
711 | ||
712 | /* Pointer to the (not necessarily aligned) malloc block. */ | |
19bcad1f SM |
713 | #ifdef HAVE_POSIX_MEMALIGN |
714 | #define ABLOCKS_BASE(abase) (abase) | |
715 | #else | |
ab6780cd | 716 | #define ABLOCKS_BASE(abase) \ |
03bb6a06 | 717 | (1 & (long) ABLOCKS_BUSY (abase) ? abase : ((void**)abase)[-1]) |
19bcad1f | 718 | #endif |
ab6780cd SM |
719 | |
720 | /* The list of free ablock. */ | |
721 | static struct ablock *free_ablock; | |
722 | ||
723 | /* Allocate an aligned block of nbytes. | |
724 | Alignment is on a multiple of BLOCK_ALIGN and `nbytes' has to be | |
725 | smaller or equal to BLOCK_BYTES. */ | |
726 | static POINTER_TYPE * | |
727 | lisp_align_malloc (nbytes, type) | |
728 | size_t nbytes; | |
729 | enum mem_type type; | |
730 | { | |
731 | void *base, *val; | |
732 | struct ablocks *abase; | |
733 | ||
734 | eassert (nbytes <= BLOCK_BYTES); | |
735 | ||
736 | BLOCK_INPUT; | |
737 | ||
738 | #ifdef GC_MALLOC_CHECK | |
739 | allocated_mem_type = type; | |
740 | #endif | |
741 | ||
742 | if (!free_ablock) | |
743 | { | |
d7489312 DL |
744 | int i; |
745 | EMACS_INT aligned; /* int gets warning casting to 64-bit pointer. */ | |
ab6780cd SM |
746 | |
747 | #ifdef DOUG_LEA_MALLOC | |
748 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed | |
749 | because mapped region contents are not preserved in | |
750 | a dumped Emacs. */ | |
751 | mallopt (M_MMAP_MAX, 0); | |
752 | #endif | |
753 | ||
19bcad1f SM |
754 | #ifdef HAVE_POSIX_MEMALIGN |
755 | { | |
756 | int err = posix_memalign (&base, BLOCK_ALIGN, ABLOCKS_BYTES); | |
757 | abase = err ? (base = NULL) : base; | |
758 | } | |
759 | #else | |
ab6780cd SM |
760 | base = malloc (ABLOCKS_BYTES); |
761 | abase = ALIGN (base, BLOCK_ALIGN); | |
4532fdde RS |
762 | if (base == 0) |
763 | { | |
764 | UNBLOCK_INPUT; | |
765 | memory_full (); | |
766 | } | |
19bcad1f | 767 | #endif |
ab6780cd SM |
768 | |
769 | aligned = (base == abase); | |
770 | if (!aligned) | |
771 | ((void**)abase)[-1] = base; | |
772 | ||
773 | #ifdef DOUG_LEA_MALLOC | |
774 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
775 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
776 | #endif | |
777 | ||
831b476c | 778 | #ifndef USE_LSB_TAG |
f4446bbf GM |
779 | /* If the memory just allocated cannot be addressed thru a Lisp |
780 | object's pointer, and it needs to be, that's equivalent to | |
781 | running out of memory. */ | |
782 | if (type != MEM_TYPE_NON_LISP) | |
783 | { | |
784 | Lisp_Object tem; | |
785 | char *end = (char *) base + ABLOCKS_BYTES - 1; | |
786 | XSETCONS (tem, end); | |
787 | if ((char *) XCONS (tem) != end) | |
788 | { | |
789 | lisp_malloc_loser = base; | |
790 | free (base); | |
791 | UNBLOCK_INPUT; | |
792 | memory_full (); | |
793 | } | |
794 | } | |
831b476c | 795 | #endif |
f4446bbf | 796 | |
ab6780cd SM |
797 | /* Initialize the blocks and put them on the free list. |
798 | Is `base' was not properly aligned, we can't use the last block. */ | |
799 | for (i = 0; i < (aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1); i++) | |
800 | { | |
801 | abase->blocks[i].abase = abase; | |
802 | abase->blocks[i].x.next_free = free_ablock; | |
803 | free_ablock = &abase->blocks[i]; | |
804 | } | |
03bb6a06 | 805 | ABLOCKS_BUSY (abase) = (struct ablocks *) (long) aligned; |
ab6780cd | 806 | |
19bcad1f | 807 | eassert (0 == ((EMACS_UINT)abase) % BLOCK_ALIGN); |
ab6780cd SM |
808 | eassert (ABLOCK_ABASE (&abase->blocks[3]) == abase); /* 3 is arbitrary */ |
809 | eassert (ABLOCK_ABASE (&abase->blocks[0]) == abase); | |
810 | eassert (ABLOCKS_BASE (abase) == base); | |
03bb6a06 | 811 | eassert (aligned == (long) ABLOCKS_BUSY (abase)); |
ab6780cd SM |
812 | } |
813 | ||
814 | abase = ABLOCK_ABASE (free_ablock); | |
03bb6a06 | 815 | ABLOCKS_BUSY (abase) = (struct ablocks *) (2 + (long) ABLOCKS_BUSY (abase)); |
ab6780cd SM |
816 | val = free_ablock; |
817 | free_ablock = free_ablock->x.next_free; | |
818 | ||
ab6780cd SM |
819 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
820 | if (val && type != MEM_TYPE_NON_LISP) | |
821 | mem_insert (val, (char *) val + nbytes, type); | |
822 | #endif | |
823 | ||
824 | UNBLOCK_INPUT; | |
825 | if (!val && nbytes) | |
826 | memory_full (); | |
827 | ||
828 | eassert (0 == ((EMACS_UINT)val) % BLOCK_ALIGN); | |
829 | return val; | |
830 | } | |
831 | ||
832 | static void | |
833 | lisp_align_free (block) | |
834 | POINTER_TYPE *block; | |
835 | { | |
836 | struct ablock *ablock = block; | |
837 | struct ablocks *abase = ABLOCK_ABASE (ablock); | |
838 | ||
839 | BLOCK_INPUT; | |
840 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK | |
841 | mem_delete (mem_find (block)); | |
842 | #endif | |
843 | /* Put on free list. */ | |
844 | ablock->x.next_free = free_ablock; | |
845 | free_ablock = ablock; | |
846 | /* Update busy count. */ | |
03bb6a06 | 847 | ABLOCKS_BUSY (abase) = (struct ablocks *) (-2 + (long) ABLOCKS_BUSY (abase)); |
d2db1c32 | 848 | |
03bb6a06 | 849 | if (2 > (long) ABLOCKS_BUSY (abase)) |
ab6780cd | 850 | { /* All the blocks are free. */ |
03bb6a06 | 851 | int i = 0, aligned = (long) ABLOCKS_BUSY (abase); |
ab6780cd SM |
852 | struct ablock **tem = &free_ablock; |
853 | struct ablock *atop = &abase->blocks[aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1]; | |
854 | ||
855 | while (*tem) | |
856 | { | |
857 | if (*tem >= (struct ablock *) abase && *tem < atop) | |
858 | { | |
859 | i++; | |
860 | *tem = (*tem)->x.next_free; | |
861 | } | |
862 | else | |
863 | tem = &(*tem)->x.next_free; | |
864 | } | |
865 | eassert ((aligned & 1) == aligned); | |
866 | eassert (i == (aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1)); | |
867 | free (ABLOCKS_BASE (abase)); | |
868 | } | |
869 | UNBLOCK_INPUT; | |
870 | } | |
3ef06d12 SM |
871 | |
872 | /* Return a new buffer structure allocated from the heap with | |
873 | a call to lisp_malloc. */ | |
874 | ||
875 | struct buffer * | |
876 | allocate_buffer () | |
877 | { | |
878 | struct buffer *b | |
879 | = (struct buffer *) lisp_malloc (sizeof (struct buffer), | |
880 | MEM_TYPE_BUFFER); | |
881 | return b; | |
882 | } | |
883 | ||
9ac0d9e0 JB |
884 | \f |
885 | /* Arranging to disable input signals while we're in malloc. | |
886 | ||
887 | This only works with GNU malloc. To help out systems which can't | |
888 | use GNU malloc, all the calls to malloc, realloc, and free | |
889 | elsewhere in the code should be inside a BLOCK_INPUT/UNBLOCK_INPUT | |
890 | pairs; unfortunately, we have no idea what C library functions | |
891 | might call malloc, so we can't really protect them unless you're | |
2c5bd608 DL |
892 | using GNU malloc. Fortunately, most of the major operating systems |
893 | can use GNU malloc. */ | |
9ac0d9e0 JB |
894 | |
895 | #ifndef SYSTEM_MALLOC | |
b3303f74 DL |
896 | #ifndef DOUG_LEA_MALLOC |
897 | extern void * (*__malloc_hook) P_ ((size_t)); | |
898 | extern void * (*__realloc_hook) P_ ((void *, size_t)); | |
899 | extern void (*__free_hook) P_ ((void *)); | |
900 | /* Else declared in malloc.h, perhaps with an extra arg. */ | |
901 | #endif /* DOUG_LEA_MALLOC */ | |
b0846f52 | 902 | static void * (*old_malloc_hook) (); |
b0846f52 | 903 | static void * (*old_realloc_hook) (); |
b0846f52 | 904 | static void (*old_free_hook) (); |
9ac0d9e0 | 905 | |
276cbe5a RS |
906 | /* This function is used as the hook for free to call. */ |
907 | ||
9ac0d9e0 JB |
908 | static void |
909 | emacs_blocked_free (ptr) | |
910 | void *ptr; | |
911 | { | |
912 | BLOCK_INPUT; | |
877935b1 GM |
913 | |
914 | #ifdef GC_MALLOC_CHECK | |
a83fee2c GM |
915 | if (ptr) |
916 | { | |
917 | struct mem_node *m; | |
177c0ea7 | 918 | |
a83fee2c GM |
919 | m = mem_find (ptr); |
920 | if (m == MEM_NIL || m->start != ptr) | |
921 | { | |
922 | fprintf (stderr, | |
923 | "Freeing `%p' which wasn't allocated with malloc\n", ptr); | |
924 | abort (); | |
925 | } | |
926 | else | |
927 | { | |
928 | /* fprintf (stderr, "free %p...%p (%p)\n", m->start, m->end, ptr); */ | |
929 | mem_delete (m); | |
930 | } | |
931 | } | |
877935b1 | 932 | #endif /* GC_MALLOC_CHECK */ |
177c0ea7 | 933 | |
9ac0d9e0 JB |
934 | __free_hook = old_free_hook; |
935 | free (ptr); | |
177c0ea7 | 936 | |
276cbe5a RS |
937 | /* If we released our reserve (due to running out of memory), |
938 | and we have a fair amount free once again, | |
939 | try to set aside another reserve in case we run out once more. */ | |
940 | if (spare_memory == 0 | |
941 | /* Verify there is enough space that even with the malloc | |
942 | hysteresis this call won't run out again. | |
943 | The code here is correct as long as SPARE_MEMORY | |
944 | is substantially larger than the block size malloc uses. */ | |
945 | && (bytes_used_when_full | |
d1658221 | 946 | > BYTES_USED + max (malloc_hysteresis, 4) * SPARE_MEMORY)) |
675d5130 | 947 | spare_memory = (char *) malloc ((size_t) SPARE_MEMORY); |
276cbe5a | 948 | |
b0846f52 | 949 | __free_hook = emacs_blocked_free; |
9ac0d9e0 JB |
950 | UNBLOCK_INPUT; |
951 | } | |
952 | ||
34400008 | 953 | |
276cbe5a RS |
954 | /* If we released our reserve (due to running out of memory), |
955 | and we have a fair amount free once again, | |
956 | try to set aside another reserve in case we run out once more. | |
957 | ||
958 | This is called when a relocatable block is freed in ralloc.c. */ | |
959 | ||
960 | void | |
961 | refill_memory_reserve () | |
962 | { | |
963 | if (spare_memory == 0) | |
675d5130 | 964 | spare_memory = (char *) malloc ((size_t) SPARE_MEMORY); |
276cbe5a RS |
965 | } |
966 | ||
34400008 | 967 | |
276cbe5a RS |
968 | /* This function is the malloc hook that Emacs uses. */ |
969 | ||
9ac0d9e0 JB |
970 | static void * |
971 | emacs_blocked_malloc (size) | |
675d5130 | 972 | size_t size; |
9ac0d9e0 JB |
973 | { |
974 | void *value; | |
975 | ||
976 | BLOCK_INPUT; | |
977 | __malloc_hook = old_malloc_hook; | |
1177ecf6 | 978 | #ifdef DOUG_LEA_MALLOC |
d1658221 | 979 | mallopt (M_TOP_PAD, malloc_hysteresis * 4096); |
1177ecf6 | 980 | #else |
d1658221 | 981 | __malloc_extra_blocks = malloc_hysteresis; |
1177ecf6 | 982 | #endif |
877935b1 | 983 | |
2756d8ee | 984 | value = (void *) malloc (size); |
877935b1 GM |
985 | |
986 | #ifdef GC_MALLOC_CHECK | |
987 | { | |
988 | struct mem_node *m = mem_find (value); | |
989 | if (m != MEM_NIL) | |
990 | { | |
991 | fprintf (stderr, "Malloc returned %p which is already in use\n", | |
992 | value); | |
993 | fprintf (stderr, "Region in use is %p...%p, %u bytes, type %d\n", | |
994 | m->start, m->end, (char *) m->end - (char *) m->start, | |
995 | m->type); | |
996 | abort (); | |
997 | } | |
998 | ||
999 | if (!dont_register_blocks) | |
1000 | { | |
1001 | mem_insert (value, (char *) value + max (1, size), allocated_mem_type); | |
1002 | allocated_mem_type = MEM_TYPE_NON_LISP; | |
1003 | } | |
1004 | } | |
1005 | #endif /* GC_MALLOC_CHECK */ | |
177c0ea7 | 1006 | |
b0846f52 | 1007 | __malloc_hook = emacs_blocked_malloc; |
9ac0d9e0 JB |
1008 | UNBLOCK_INPUT; |
1009 | ||
877935b1 | 1010 | /* fprintf (stderr, "%p malloc\n", value); */ |
9ac0d9e0 JB |
1011 | return value; |
1012 | } | |
1013 | ||
34400008 GM |
1014 | |
1015 | /* This function is the realloc hook that Emacs uses. */ | |
1016 | ||
9ac0d9e0 JB |
1017 | static void * |
1018 | emacs_blocked_realloc (ptr, size) | |
1019 | void *ptr; | |
675d5130 | 1020 | size_t size; |
9ac0d9e0 JB |
1021 | { |
1022 | void *value; | |
1023 | ||
1024 | BLOCK_INPUT; | |
1025 | __realloc_hook = old_realloc_hook; | |
877935b1 GM |
1026 | |
1027 | #ifdef GC_MALLOC_CHECK | |
1028 | if (ptr) | |
1029 | { | |
1030 | struct mem_node *m = mem_find (ptr); | |
1031 | if (m == MEM_NIL || m->start != ptr) | |
1032 | { | |
1033 | fprintf (stderr, | |
1034 | "Realloc of %p which wasn't allocated with malloc\n", | |
1035 | ptr); | |
1036 | abort (); | |
1037 | } | |
1038 | ||
1039 | mem_delete (m); | |
1040 | } | |
177c0ea7 | 1041 | |
877935b1 | 1042 | /* fprintf (stderr, "%p -> realloc\n", ptr); */ |
177c0ea7 | 1043 | |
877935b1 GM |
1044 | /* Prevent malloc from registering blocks. */ |
1045 | dont_register_blocks = 1; | |
1046 | #endif /* GC_MALLOC_CHECK */ | |
1047 | ||
2756d8ee | 1048 | value = (void *) realloc (ptr, size); |
877935b1 GM |
1049 | |
1050 | #ifdef GC_MALLOC_CHECK | |
1051 | dont_register_blocks = 0; | |
1052 | ||
1053 | { | |
1054 | struct mem_node *m = mem_find (value); | |
1055 | if (m != MEM_NIL) | |
1056 | { | |
1057 | fprintf (stderr, "Realloc returns memory that is already in use\n"); | |
1058 | abort (); | |
1059 | } | |
1060 | ||
1061 | /* Can't handle zero size regions in the red-black tree. */ | |
1062 | mem_insert (value, (char *) value + max (size, 1), MEM_TYPE_NON_LISP); | |
1063 | } | |
177c0ea7 | 1064 | |
877935b1 GM |
1065 | /* fprintf (stderr, "%p <- realloc\n", value); */ |
1066 | #endif /* GC_MALLOC_CHECK */ | |
177c0ea7 | 1067 | |
b0846f52 | 1068 | __realloc_hook = emacs_blocked_realloc; |
9ac0d9e0 JB |
1069 | UNBLOCK_INPUT; |
1070 | ||
1071 | return value; | |
1072 | } | |
1073 | ||
34400008 GM |
1074 | |
1075 | /* Called from main to set up malloc to use our hooks. */ | |
1076 | ||
9ac0d9e0 JB |
1077 | void |
1078 | uninterrupt_malloc () | |
1079 | { | |
c8099634 RS |
1080 | if (__free_hook != emacs_blocked_free) |
1081 | old_free_hook = __free_hook; | |
b0846f52 | 1082 | __free_hook = emacs_blocked_free; |
9ac0d9e0 | 1083 | |
c8099634 RS |
1084 | if (__malloc_hook != emacs_blocked_malloc) |
1085 | old_malloc_hook = __malloc_hook; | |
b0846f52 | 1086 | __malloc_hook = emacs_blocked_malloc; |
9ac0d9e0 | 1087 | |
c8099634 RS |
1088 | if (__realloc_hook != emacs_blocked_realloc) |
1089 | old_realloc_hook = __realloc_hook; | |
b0846f52 | 1090 | __realloc_hook = emacs_blocked_realloc; |
9ac0d9e0 | 1091 | } |
2e471eb5 GM |
1092 | |
1093 | #endif /* not SYSTEM_MALLOC */ | |
1094 | ||
1095 | ||
7146af97 | 1096 | \f |
2e471eb5 GM |
1097 | /*********************************************************************** |
1098 | Interval Allocation | |
1099 | ***********************************************************************/ | |
1a4f1e2c | 1100 | |
34400008 GM |
1101 | /* Number of intervals allocated in an interval_block structure. |
1102 | The 1020 is 1024 minus malloc overhead. */ | |
1103 | ||
d5e35230 JA |
1104 | #define INTERVAL_BLOCK_SIZE \ |
1105 | ((1020 - sizeof (struct interval_block *)) / sizeof (struct interval)) | |
1106 | ||
34400008 GM |
1107 | /* Intervals are allocated in chunks in form of an interval_block |
1108 | structure. */ | |
1109 | ||
d5e35230 | 1110 | struct interval_block |
2e471eb5 | 1111 | { |
d05b383a | 1112 | /* Place `intervals' first, to preserve alignment. */ |
2e471eb5 | 1113 | struct interval intervals[INTERVAL_BLOCK_SIZE]; |
d05b383a | 1114 | struct interval_block *next; |
2e471eb5 | 1115 | }; |
d5e35230 | 1116 | |
34400008 GM |
1117 | /* Current interval block. Its `next' pointer points to older |
1118 | blocks. */ | |
1119 | ||
d5e35230 | 1120 | struct interval_block *interval_block; |
34400008 GM |
1121 | |
1122 | /* Index in interval_block above of the next unused interval | |
1123 | structure. */ | |
1124 | ||
d5e35230 | 1125 | static int interval_block_index; |
34400008 GM |
1126 | |
1127 | /* Number of free and live intervals. */ | |
1128 | ||
2e471eb5 | 1129 | static int total_free_intervals, total_intervals; |
d5e35230 | 1130 | |
34400008 GM |
1131 | /* List of free intervals. */ |
1132 | ||
d5e35230 JA |
1133 | INTERVAL interval_free_list; |
1134 | ||
c8099634 | 1135 | /* Total number of interval blocks now in use. */ |
2e471eb5 | 1136 | |
c8099634 RS |
1137 | int n_interval_blocks; |
1138 | ||
34400008 GM |
1139 | |
1140 | /* Initialize interval allocation. */ | |
1141 | ||
d5e35230 JA |
1142 | static void |
1143 | init_intervals () | |
1144 | { | |
0930c1a1 SM |
1145 | interval_block = NULL; |
1146 | interval_block_index = INTERVAL_BLOCK_SIZE; | |
d5e35230 | 1147 | interval_free_list = 0; |
0930c1a1 | 1148 | n_interval_blocks = 0; |
d5e35230 JA |
1149 | } |
1150 | ||
34400008 GM |
1151 | |
1152 | /* Return a new interval. */ | |
d5e35230 JA |
1153 | |
1154 | INTERVAL | |
1155 | make_interval () | |
1156 | { | |
1157 | INTERVAL val; | |
1158 | ||
1159 | if (interval_free_list) | |
1160 | { | |
1161 | val = interval_free_list; | |
439d5cb4 | 1162 | interval_free_list = INTERVAL_PARENT (interval_free_list); |
d5e35230 JA |
1163 | } |
1164 | else | |
1165 | { | |
1166 | if (interval_block_index == INTERVAL_BLOCK_SIZE) | |
1167 | { | |
3c06d205 KH |
1168 | register struct interval_block *newi; |
1169 | ||
34400008 GM |
1170 | newi = (struct interval_block *) lisp_malloc (sizeof *newi, |
1171 | MEM_TYPE_NON_LISP); | |
d5e35230 | 1172 | |
d5e35230 JA |
1173 | newi->next = interval_block; |
1174 | interval_block = newi; | |
1175 | interval_block_index = 0; | |
c8099634 | 1176 | n_interval_blocks++; |
d5e35230 JA |
1177 | } |
1178 | val = &interval_block->intervals[interval_block_index++]; | |
1179 | } | |
1180 | consing_since_gc += sizeof (struct interval); | |
310ea200 | 1181 | intervals_consed++; |
d5e35230 | 1182 | RESET_INTERVAL (val); |
2336fe58 | 1183 | val->gcmarkbit = 0; |
d5e35230 JA |
1184 | return val; |
1185 | } | |
1186 | ||
34400008 GM |
1187 | |
1188 | /* Mark Lisp objects in interval I. */ | |
d5e35230 JA |
1189 | |
1190 | static void | |
d393c068 | 1191 | mark_interval (i, dummy) |
d5e35230 | 1192 | register INTERVAL i; |
d393c068 | 1193 | Lisp_Object dummy; |
d5e35230 | 1194 | { |
2336fe58 SM |
1195 | eassert (!i->gcmarkbit); /* Intervals are never shared. */ |
1196 | i->gcmarkbit = 1; | |
49723c04 | 1197 | mark_object (i->plist); |
d5e35230 JA |
1198 | } |
1199 | ||
34400008 GM |
1200 | |
1201 | /* Mark the interval tree rooted in TREE. Don't call this directly; | |
1202 | use the macro MARK_INTERVAL_TREE instead. */ | |
1203 | ||
d5e35230 JA |
1204 | static void |
1205 | mark_interval_tree (tree) | |
1206 | register INTERVAL tree; | |
1207 | { | |
e8720644 JB |
1208 | /* No need to test if this tree has been marked already; this |
1209 | function is always called through the MARK_INTERVAL_TREE macro, | |
1210 | which takes care of that. */ | |
1211 | ||
1e934989 | 1212 | traverse_intervals_noorder (tree, mark_interval, Qnil); |
d5e35230 JA |
1213 | } |
1214 | ||
34400008 GM |
1215 | |
1216 | /* Mark the interval tree rooted in I. */ | |
1217 | ||
e8720644 JB |
1218 | #define MARK_INTERVAL_TREE(i) \ |
1219 | do { \ | |
2336fe58 | 1220 | if (!NULL_INTERVAL_P (i) && !i->gcmarkbit) \ |
e8720644 JB |
1221 | mark_interval_tree (i); \ |
1222 | } while (0) | |
d5e35230 | 1223 | |
34400008 | 1224 | |
2e471eb5 GM |
1225 | #define UNMARK_BALANCE_INTERVALS(i) \ |
1226 | do { \ | |
1227 | if (! NULL_INTERVAL_P (i)) \ | |
2336fe58 | 1228 | (i) = balance_intervals (i); \ |
2e471eb5 | 1229 | } while (0) |
d5e35230 | 1230 | |
cc2d8c6b KR |
1231 | \f |
1232 | /* Number support. If NO_UNION_TYPE isn't in effect, we | |
1233 | can't create number objects in macros. */ | |
1234 | #ifndef make_number | |
1235 | Lisp_Object | |
1236 | make_number (n) | |
1237 | int n; | |
1238 | { | |
1239 | Lisp_Object obj; | |
1240 | obj.s.val = n; | |
1241 | obj.s.type = Lisp_Int; | |
1242 | return obj; | |
1243 | } | |
1244 | #endif | |
d5e35230 | 1245 | \f |
2e471eb5 GM |
1246 | /*********************************************************************** |
1247 | String Allocation | |
1248 | ***********************************************************************/ | |
1a4f1e2c | 1249 | |
2e471eb5 GM |
1250 | /* Lisp_Strings are allocated in string_block structures. When a new |
1251 | string_block is allocated, all the Lisp_Strings it contains are | |
e0fead5d | 1252 | added to a free-list string_free_list. When a new Lisp_String is |
2e471eb5 GM |
1253 | needed, it is taken from that list. During the sweep phase of GC, |
1254 | string_blocks that are entirely free are freed, except two which | |
1255 | we keep. | |
7146af97 | 1256 | |
2e471eb5 GM |
1257 | String data is allocated from sblock structures. Strings larger |
1258 | than LARGE_STRING_BYTES, get their own sblock, data for smaller | |
1259 | strings is sub-allocated out of sblocks of size SBLOCK_SIZE. | |
7146af97 | 1260 | |
2e471eb5 GM |
1261 | Sblocks consist internally of sdata structures, one for each |
1262 | Lisp_String. The sdata structure points to the Lisp_String it | |
1263 | belongs to. The Lisp_String points back to the `u.data' member of | |
1264 | its sdata structure. | |
7146af97 | 1265 | |
2e471eb5 GM |
1266 | When a Lisp_String is freed during GC, it is put back on |
1267 | string_free_list, and its `data' member and its sdata's `string' | |
1268 | pointer is set to null. The size of the string is recorded in the | |
1269 | `u.nbytes' member of the sdata. So, sdata structures that are no | |
1270 | longer used, can be easily recognized, and it's easy to compact the | |
1271 | sblocks of small strings which we do in compact_small_strings. */ | |
7146af97 | 1272 | |
2e471eb5 GM |
1273 | /* Size in bytes of an sblock structure used for small strings. This |
1274 | is 8192 minus malloc overhead. */ | |
7146af97 | 1275 | |
2e471eb5 | 1276 | #define SBLOCK_SIZE 8188 |
c8099634 | 1277 | |
2e471eb5 GM |
1278 | /* Strings larger than this are considered large strings. String data |
1279 | for large strings is allocated from individual sblocks. */ | |
7146af97 | 1280 | |
2e471eb5 GM |
1281 | #define LARGE_STRING_BYTES 1024 |
1282 | ||
1283 | /* Structure describing string memory sub-allocated from an sblock. | |
1284 | This is where the contents of Lisp strings are stored. */ | |
1285 | ||
1286 | struct sdata | |
7146af97 | 1287 | { |
2e471eb5 GM |
1288 | /* Back-pointer to the string this sdata belongs to. If null, this |
1289 | structure is free, and the NBYTES member of the union below | |
34400008 | 1290 | contains the string's byte size (the same value that STRING_BYTES |
2e471eb5 GM |
1291 | would return if STRING were non-null). If non-null, STRING_BYTES |
1292 | (STRING) is the size of the data, and DATA contains the string's | |
1293 | contents. */ | |
1294 | struct Lisp_String *string; | |
7146af97 | 1295 | |
31d929e5 | 1296 | #ifdef GC_CHECK_STRING_BYTES |
177c0ea7 | 1297 | |
31d929e5 GM |
1298 | EMACS_INT nbytes; |
1299 | unsigned char data[1]; | |
177c0ea7 | 1300 | |
31d929e5 GM |
1301 | #define SDATA_NBYTES(S) (S)->nbytes |
1302 | #define SDATA_DATA(S) (S)->data | |
177c0ea7 | 1303 | |
31d929e5 GM |
1304 | #else /* not GC_CHECK_STRING_BYTES */ |
1305 | ||
2e471eb5 GM |
1306 | union |
1307 | { | |
1308 | /* When STRING in non-null. */ | |
1309 | unsigned char data[1]; | |
1310 | ||
1311 | /* When STRING is null. */ | |
1312 | EMACS_INT nbytes; | |
1313 | } u; | |
177c0ea7 | 1314 | |
31d929e5 GM |
1315 | |
1316 | #define SDATA_NBYTES(S) (S)->u.nbytes | |
1317 | #define SDATA_DATA(S) (S)->u.data | |
1318 | ||
1319 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 GM |
1320 | }; |
1321 | ||
31d929e5 | 1322 | |
2e471eb5 GM |
1323 | /* Structure describing a block of memory which is sub-allocated to |
1324 | obtain string data memory for strings. Blocks for small strings | |
1325 | are of fixed size SBLOCK_SIZE. Blocks for large strings are made | |
1326 | as large as needed. */ | |
1327 | ||
1328 | struct sblock | |
7146af97 | 1329 | { |
2e471eb5 GM |
1330 | /* Next in list. */ |
1331 | struct sblock *next; | |
7146af97 | 1332 | |
2e471eb5 GM |
1333 | /* Pointer to the next free sdata block. This points past the end |
1334 | of the sblock if there isn't any space left in this block. */ | |
1335 | struct sdata *next_free; | |
1336 | ||
1337 | /* Start of data. */ | |
1338 | struct sdata first_data; | |
1339 | }; | |
1340 | ||
1341 | /* Number of Lisp strings in a string_block structure. The 1020 is | |
1342 | 1024 minus malloc overhead. */ | |
1343 | ||
19bcad1f | 1344 | #define STRING_BLOCK_SIZE \ |
2e471eb5 GM |
1345 | ((1020 - sizeof (struct string_block *)) / sizeof (struct Lisp_String)) |
1346 | ||
1347 | /* Structure describing a block from which Lisp_String structures | |
1348 | are allocated. */ | |
1349 | ||
1350 | struct string_block | |
7146af97 | 1351 | { |
d05b383a | 1352 | /* Place `strings' first, to preserve alignment. */ |
19bcad1f | 1353 | struct Lisp_String strings[STRING_BLOCK_SIZE]; |
d05b383a | 1354 | struct string_block *next; |
2e471eb5 | 1355 | }; |
7146af97 | 1356 | |
2e471eb5 GM |
1357 | /* Head and tail of the list of sblock structures holding Lisp string |
1358 | data. We always allocate from current_sblock. The NEXT pointers | |
1359 | in the sblock structures go from oldest_sblock to current_sblock. */ | |
3c06d205 | 1360 | |
2e471eb5 | 1361 | static struct sblock *oldest_sblock, *current_sblock; |
7146af97 | 1362 | |
2e471eb5 | 1363 | /* List of sblocks for large strings. */ |
7146af97 | 1364 | |
2e471eb5 | 1365 | static struct sblock *large_sblocks; |
7146af97 | 1366 | |
2e471eb5 | 1367 | /* List of string_block structures, and how many there are. */ |
7146af97 | 1368 | |
2e471eb5 GM |
1369 | static struct string_block *string_blocks; |
1370 | static int n_string_blocks; | |
7146af97 | 1371 | |
2e471eb5 | 1372 | /* Free-list of Lisp_Strings. */ |
7146af97 | 1373 | |
2e471eb5 | 1374 | static struct Lisp_String *string_free_list; |
7146af97 | 1375 | |
2e471eb5 | 1376 | /* Number of live and free Lisp_Strings. */ |
c8099634 | 1377 | |
2e471eb5 | 1378 | static int total_strings, total_free_strings; |
7146af97 | 1379 | |
2e471eb5 GM |
1380 | /* Number of bytes used by live strings. */ |
1381 | ||
1382 | static int total_string_size; | |
1383 | ||
1384 | /* Given a pointer to a Lisp_String S which is on the free-list | |
1385 | string_free_list, return a pointer to its successor in the | |
1386 | free-list. */ | |
1387 | ||
1388 | #define NEXT_FREE_LISP_STRING(S) (*(struct Lisp_String **) (S)) | |
1389 | ||
1390 | /* Return a pointer to the sdata structure belonging to Lisp string S. | |
1391 | S must be live, i.e. S->data must not be null. S->data is actually | |
1392 | a pointer to the `u.data' member of its sdata structure; the | |
1393 | structure starts at a constant offset in front of that. */ | |
177c0ea7 | 1394 | |
31d929e5 GM |
1395 | #ifdef GC_CHECK_STRING_BYTES |
1396 | ||
1397 | #define SDATA_OF_STRING(S) \ | |
1398 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *) \ | |
1399 | - sizeof (EMACS_INT))) | |
1400 | ||
1401 | #else /* not GC_CHECK_STRING_BYTES */ | |
1402 | ||
2e471eb5 GM |
1403 | #define SDATA_OF_STRING(S) \ |
1404 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *))) | |
1405 | ||
31d929e5 GM |
1406 | #endif /* not GC_CHECK_STRING_BYTES */ |
1407 | ||
2e471eb5 GM |
1408 | /* Value is the size of an sdata structure large enough to hold NBYTES |
1409 | bytes of string data. The value returned includes a terminating | |
1410 | NUL byte, the size of the sdata structure, and padding. */ | |
1411 | ||
31d929e5 GM |
1412 | #ifdef GC_CHECK_STRING_BYTES |
1413 | ||
2e471eb5 GM |
1414 | #define SDATA_SIZE(NBYTES) \ |
1415 | ((sizeof (struct Lisp_String *) \ | |
1416 | + (NBYTES) + 1 \ | |
31d929e5 | 1417 | + sizeof (EMACS_INT) \ |
2e471eb5 GM |
1418 | + sizeof (EMACS_INT) - 1) \ |
1419 | & ~(sizeof (EMACS_INT) - 1)) | |
1420 | ||
31d929e5 GM |
1421 | #else /* not GC_CHECK_STRING_BYTES */ |
1422 | ||
1423 | #define SDATA_SIZE(NBYTES) \ | |
1424 | ((sizeof (struct Lisp_String *) \ | |
1425 | + (NBYTES) + 1 \ | |
1426 | + sizeof (EMACS_INT) - 1) \ | |
1427 | & ~(sizeof (EMACS_INT) - 1)) | |
1428 | ||
1429 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 GM |
1430 | |
1431 | /* Initialize string allocation. Called from init_alloc_once. */ | |
d457598b AS |
1432 | |
1433 | void | |
2e471eb5 | 1434 | init_strings () |
7146af97 | 1435 | { |
2e471eb5 GM |
1436 | total_strings = total_free_strings = total_string_size = 0; |
1437 | oldest_sblock = current_sblock = large_sblocks = NULL; | |
1438 | string_blocks = NULL; | |
1439 | n_string_blocks = 0; | |
1440 | string_free_list = NULL; | |
7146af97 JB |
1441 | } |
1442 | ||
2e471eb5 | 1443 | |
361b097f GM |
1444 | #ifdef GC_CHECK_STRING_BYTES |
1445 | ||
361b097f GM |
1446 | static int check_string_bytes_count; |
1447 | ||
676a7251 GM |
1448 | void check_string_bytes P_ ((int)); |
1449 | void check_sblock P_ ((struct sblock *)); | |
1450 | ||
1451 | #define CHECK_STRING_BYTES(S) STRING_BYTES (S) | |
1452 | ||
1453 | ||
1454 | /* Like GC_STRING_BYTES, but with debugging check. */ | |
1455 | ||
1456 | int | |
1457 | string_bytes (s) | |
1458 | struct Lisp_String *s; | |
1459 | { | |
7cdee936 | 1460 | int nbytes = (s->size_byte < 0 ? s->size & ~ARRAY_MARK_FLAG : s->size_byte); |
676a7251 GM |
1461 | if (!PURE_POINTER_P (s) |
1462 | && s->data | |
1463 | && nbytes != SDATA_NBYTES (SDATA_OF_STRING (s))) | |
1464 | abort (); | |
1465 | return nbytes; | |
1466 | } | |
177c0ea7 | 1467 | |
2c5bd608 | 1468 | /* Check validity of Lisp strings' string_bytes member in B. */ |
676a7251 | 1469 | |
361b097f | 1470 | void |
676a7251 GM |
1471 | check_sblock (b) |
1472 | struct sblock *b; | |
361b097f | 1473 | { |
676a7251 | 1474 | struct sdata *from, *end, *from_end; |
177c0ea7 | 1475 | |
676a7251 | 1476 | end = b->next_free; |
177c0ea7 | 1477 | |
676a7251 | 1478 | for (from = &b->first_data; from < end; from = from_end) |
361b097f | 1479 | { |
676a7251 GM |
1480 | /* Compute the next FROM here because copying below may |
1481 | overwrite data we need to compute it. */ | |
1482 | int nbytes; | |
177c0ea7 | 1483 | |
676a7251 GM |
1484 | /* Check that the string size recorded in the string is the |
1485 | same as the one recorded in the sdata structure. */ | |
1486 | if (from->string) | |
1487 | CHECK_STRING_BYTES (from->string); | |
177c0ea7 | 1488 | |
676a7251 GM |
1489 | if (from->string) |
1490 | nbytes = GC_STRING_BYTES (from->string); | |
1491 | else | |
1492 | nbytes = SDATA_NBYTES (from); | |
177c0ea7 | 1493 | |
676a7251 GM |
1494 | nbytes = SDATA_SIZE (nbytes); |
1495 | from_end = (struct sdata *) ((char *) from + nbytes); | |
1496 | } | |
1497 | } | |
361b097f | 1498 | |
676a7251 GM |
1499 | |
1500 | /* Check validity of Lisp strings' string_bytes member. ALL_P | |
1501 | non-zero means check all strings, otherwise check only most | |
1502 | recently allocated strings. Used for hunting a bug. */ | |
1503 | ||
1504 | void | |
1505 | check_string_bytes (all_p) | |
1506 | int all_p; | |
1507 | { | |
1508 | if (all_p) | |
1509 | { | |
1510 | struct sblock *b; | |
1511 | ||
1512 | for (b = large_sblocks; b; b = b->next) | |
1513 | { | |
1514 | struct Lisp_String *s = b->first_data.string; | |
1515 | if (s) | |
1516 | CHECK_STRING_BYTES (s); | |
361b097f | 1517 | } |
177c0ea7 | 1518 | |
676a7251 GM |
1519 | for (b = oldest_sblock; b; b = b->next) |
1520 | check_sblock (b); | |
361b097f | 1521 | } |
676a7251 GM |
1522 | else |
1523 | check_sblock (current_sblock); | |
361b097f GM |
1524 | } |
1525 | ||
1526 | #endif /* GC_CHECK_STRING_BYTES */ | |
1527 | ||
1528 | ||
2e471eb5 GM |
1529 | /* Return a new Lisp_String. */ |
1530 | ||
1531 | static struct Lisp_String * | |
1532 | allocate_string () | |
7146af97 | 1533 | { |
2e471eb5 | 1534 | struct Lisp_String *s; |
7146af97 | 1535 | |
2e471eb5 GM |
1536 | /* If the free-list is empty, allocate a new string_block, and |
1537 | add all the Lisp_Strings in it to the free-list. */ | |
1538 | if (string_free_list == NULL) | |
7146af97 | 1539 | { |
2e471eb5 GM |
1540 | struct string_block *b; |
1541 | int i; | |
1542 | ||
34400008 | 1543 | b = (struct string_block *) lisp_malloc (sizeof *b, MEM_TYPE_STRING); |
2e471eb5 GM |
1544 | bzero (b, sizeof *b); |
1545 | b->next = string_blocks; | |
1546 | string_blocks = b; | |
1547 | ++n_string_blocks; | |
1548 | ||
19bcad1f | 1549 | for (i = STRING_BLOCK_SIZE - 1; i >= 0; --i) |
7146af97 | 1550 | { |
2e471eb5 GM |
1551 | s = b->strings + i; |
1552 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1553 | string_free_list = s; | |
7146af97 | 1554 | } |
2e471eb5 | 1555 | |
19bcad1f | 1556 | total_free_strings += STRING_BLOCK_SIZE; |
7146af97 | 1557 | } |
c0f51373 | 1558 | |
2e471eb5 GM |
1559 | /* Pop a Lisp_String off the free-list. */ |
1560 | s = string_free_list; | |
1561 | string_free_list = NEXT_FREE_LISP_STRING (s); | |
c0f51373 | 1562 | |
2e471eb5 GM |
1563 | /* Probably not strictly necessary, but play it safe. */ |
1564 | bzero (s, sizeof *s); | |
c0f51373 | 1565 | |
2e471eb5 GM |
1566 | --total_free_strings; |
1567 | ++total_strings; | |
1568 | ++strings_consed; | |
1569 | consing_since_gc += sizeof *s; | |
c0f51373 | 1570 | |
361b097f | 1571 | #ifdef GC_CHECK_STRING_BYTES |
83a96b4d | 1572 | if (!noninteractive |
e0f712ba | 1573 | #ifdef MAC_OS8 |
83a96b4d AC |
1574 | && current_sblock |
1575 | #endif | |
1576 | ) | |
361b097f | 1577 | { |
676a7251 GM |
1578 | if (++check_string_bytes_count == 200) |
1579 | { | |
1580 | check_string_bytes_count = 0; | |
1581 | check_string_bytes (1); | |
1582 | } | |
1583 | else | |
1584 | check_string_bytes (0); | |
361b097f | 1585 | } |
676a7251 | 1586 | #endif /* GC_CHECK_STRING_BYTES */ |
361b097f | 1587 | |
2e471eb5 | 1588 | return s; |
c0f51373 | 1589 | } |
7146af97 | 1590 | |
7146af97 | 1591 | |
2e471eb5 GM |
1592 | /* Set up Lisp_String S for holding NCHARS characters, NBYTES bytes, |
1593 | plus a NUL byte at the end. Allocate an sdata structure for S, and | |
1594 | set S->data to its `u.data' member. Store a NUL byte at the end of | |
1595 | S->data. Set S->size to NCHARS and S->size_byte to NBYTES. Free | |
1596 | S->data if it was initially non-null. */ | |
7146af97 | 1597 | |
2e471eb5 GM |
1598 | void |
1599 | allocate_string_data (s, nchars, nbytes) | |
1600 | struct Lisp_String *s; | |
1601 | int nchars, nbytes; | |
7146af97 | 1602 | { |
5c5fecb3 | 1603 | struct sdata *data, *old_data; |
2e471eb5 | 1604 | struct sblock *b; |
5c5fecb3 | 1605 | int needed, old_nbytes; |
7146af97 | 1606 | |
2e471eb5 GM |
1607 | /* Determine the number of bytes needed to store NBYTES bytes |
1608 | of string data. */ | |
1609 | needed = SDATA_SIZE (nbytes); | |
7146af97 | 1610 | |
2e471eb5 GM |
1611 | if (nbytes > LARGE_STRING_BYTES) |
1612 | { | |
675d5130 | 1613 | size_t size = sizeof *b - sizeof (struct sdata) + needed; |
2e471eb5 GM |
1614 | |
1615 | #ifdef DOUG_LEA_MALLOC | |
f8608968 GM |
1616 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
1617 | because mapped region contents are not preserved in | |
d36b182f DL |
1618 | a dumped Emacs. |
1619 | ||
1620 | In case you think of allowing it in a dumped Emacs at the | |
1621 | cost of not being able to re-dump, there's another reason: | |
1622 | mmap'ed data typically have an address towards the top of the | |
1623 | address space, which won't fit into an EMACS_INT (at least on | |
1624 | 32-bit systems with the current tagging scheme). --fx */ | |
2e471eb5 GM |
1625 | mallopt (M_MMAP_MAX, 0); |
1626 | #endif | |
1627 | ||
34400008 | 1628 | b = (struct sblock *) lisp_malloc (size, MEM_TYPE_NON_LISP); |
177c0ea7 | 1629 | |
2e471eb5 GM |
1630 | #ifdef DOUG_LEA_MALLOC |
1631 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
1632 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
1633 | #endif | |
177c0ea7 | 1634 | |
2e471eb5 GM |
1635 | b->next_free = &b->first_data; |
1636 | b->first_data.string = NULL; | |
1637 | b->next = large_sblocks; | |
1638 | large_sblocks = b; | |
1639 | } | |
1640 | else if (current_sblock == NULL | |
1641 | || (((char *) current_sblock + SBLOCK_SIZE | |
1642 | - (char *) current_sblock->next_free) | |
1643 | < needed)) | |
1644 | { | |
1645 | /* Not enough room in the current sblock. */ | |
34400008 | 1646 | b = (struct sblock *) lisp_malloc (SBLOCK_SIZE, MEM_TYPE_NON_LISP); |
2e471eb5 GM |
1647 | b->next_free = &b->first_data; |
1648 | b->first_data.string = NULL; | |
1649 | b->next = NULL; | |
1650 | ||
1651 | if (current_sblock) | |
1652 | current_sblock->next = b; | |
1653 | else | |
1654 | oldest_sblock = b; | |
1655 | current_sblock = b; | |
1656 | } | |
1657 | else | |
1658 | b = current_sblock; | |
5c5fecb3 GM |
1659 | |
1660 | old_data = s->data ? SDATA_OF_STRING (s) : NULL; | |
1661 | old_nbytes = GC_STRING_BYTES (s); | |
177c0ea7 | 1662 | |
2e471eb5 GM |
1663 | data = b->next_free; |
1664 | data->string = s; | |
31d929e5 GM |
1665 | s->data = SDATA_DATA (data); |
1666 | #ifdef GC_CHECK_STRING_BYTES | |
1667 | SDATA_NBYTES (data) = nbytes; | |
1668 | #endif | |
2e471eb5 GM |
1669 | s->size = nchars; |
1670 | s->size_byte = nbytes; | |
1671 | s->data[nbytes] = '\0'; | |
1672 | b->next_free = (struct sdata *) ((char *) data + needed); | |
177c0ea7 | 1673 | |
5c5fecb3 GM |
1674 | /* If S had already data assigned, mark that as free by setting its |
1675 | string back-pointer to null, and recording the size of the data | |
00c9c33c | 1676 | in it. */ |
5c5fecb3 GM |
1677 | if (old_data) |
1678 | { | |
31d929e5 | 1679 | SDATA_NBYTES (old_data) = old_nbytes; |
5c5fecb3 GM |
1680 | old_data->string = NULL; |
1681 | } | |
1682 | ||
2e471eb5 GM |
1683 | consing_since_gc += needed; |
1684 | } | |
1685 | ||
1686 | ||
1687 | /* Sweep and compact strings. */ | |
1688 | ||
1689 | static void | |
1690 | sweep_strings () | |
1691 | { | |
1692 | struct string_block *b, *next; | |
1693 | struct string_block *live_blocks = NULL; | |
177c0ea7 | 1694 | |
2e471eb5 GM |
1695 | string_free_list = NULL; |
1696 | total_strings = total_free_strings = 0; | |
1697 | total_string_size = 0; | |
1698 | ||
1699 | /* Scan strings_blocks, free Lisp_Strings that aren't marked. */ | |
1700 | for (b = string_blocks; b; b = next) | |
1701 | { | |
1702 | int i, nfree = 0; | |
1703 | struct Lisp_String *free_list_before = string_free_list; | |
1704 | ||
1705 | next = b->next; | |
1706 | ||
19bcad1f | 1707 | for (i = 0; i < STRING_BLOCK_SIZE; ++i) |
2e471eb5 GM |
1708 | { |
1709 | struct Lisp_String *s = b->strings + i; | |
1710 | ||
1711 | if (s->data) | |
1712 | { | |
1713 | /* String was not on free-list before. */ | |
1714 | if (STRING_MARKED_P (s)) | |
1715 | { | |
1716 | /* String is live; unmark it and its intervals. */ | |
1717 | UNMARK_STRING (s); | |
177c0ea7 | 1718 | |
2e471eb5 GM |
1719 | if (!NULL_INTERVAL_P (s->intervals)) |
1720 | UNMARK_BALANCE_INTERVALS (s->intervals); | |
1721 | ||
1722 | ++total_strings; | |
1723 | total_string_size += STRING_BYTES (s); | |
1724 | } | |
1725 | else | |
1726 | { | |
1727 | /* String is dead. Put it on the free-list. */ | |
1728 | struct sdata *data = SDATA_OF_STRING (s); | |
1729 | ||
1730 | /* Save the size of S in its sdata so that we know | |
1731 | how large that is. Reset the sdata's string | |
1732 | back-pointer so that we know it's free. */ | |
31d929e5 GM |
1733 | #ifdef GC_CHECK_STRING_BYTES |
1734 | if (GC_STRING_BYTES (s) != SDATA_NBYTES (data)) | |
1735 | abort (); | |
1736 | #else | |
2e471eb5 | 1737 | data->u.nbytes = GC_STRING_BYTES (s); |
31d929e5 | 1738 | #endif |
2e471eb5 GM |
1739 | data->string = NULL; |
1740 | ||
1741 | /* Reset the strings's `data' member so that we | |
1742 | know it's free. */ | |
1743 | s->data = NULL; | |
1744 | ||
1745 | /* Put the string on the free-list. */ | |
1746 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1747 | string_free_list = s; | |
1748 | ++nfree; | |
1749 | } | |
1750 | } | |
1751 | else | |
1752 | { | |
1753 | /* S was on the free-list before. Put it there again. */ | |
1754 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1755 | string_free_list = s; | |
1756 | ++nfree; | |
1757 | } | |
1758 | } | |
1759 | ||
34400008 | 1760 | /* Free blocks that contain free Lisp_Strings only, except |
2e471eb5 | 1761 | the first two of them. */ |
19bcad1f SM |
1762 | if (nfree == STRING_BLOCK_SIZE |
1763 | && total_free_strings > STRING_BLOCK_SIZE) | |
2e471eb5 GM |
1764 | { |
1765 | lisp_free (b); | |
1766 | --n_string_blocks; | |
1767 | string_free_list = free_list_before; | |
1768 | } | |
1769 | else | |
1770 | { | |
1771 | total_free_strings += nfree; | |
1772 | b->next = live_blocks; | |
1773 | live_blocks = b; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | string_blocks = live_blocks; | |
1778 | free_large_strings (); | |
1779 | compact_small_strings (); | |
1780 | } | |
1781 | ||
1782 | ||
1783 | /* Free dead large strings. */ | |
1784 | ||
1785 | static void | |
1786 | free_large_strings () | |
1787 | { | |
1788 | struct sblock *b, *next; | |
1789 | struct sblock *live_blocks = NULL; | |
177c0ea7 | 1790 | |
2e471eb5 GM |
1791 | for (b = large_sblocks; b; b = next) |
1792 | { | |
1793 | next = b->next; | |
1794 | ||
1795 | if (b->first_data.string == NULL) | |
1796 | lisp_free (b); | |
1797 | else | |
1798 | { | |
1799 | b->next = live_blocks; | |
1800 | live_blocks = b; | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | large_sblocks = live_blocks; | |
1805 | } | |
1806 | ||
1807 | ||
1808 | /* Compact data of small strings. Free sblocks that don't contain | |
1809 | data of live strings after compaction. */ | |
1810 | ||
1811 | static void | |
1812 | compact_small_strings () | |
1813 | { | |
1814 | struct sblock *b, *tb, *next; | |
1815 | struct sdata *from, *to, *end, *tb_end; | |
1816 | struct sdata *to_end, *from_end; | |
1817 | ||
1818 | /* TB is the sblock we copy to, TO is the sdata within TB we copy | |
1819 | to, and TB_END is the end of TB. */ | |
1820 | tb = oldest_sblock; | |
1821 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
1822 | to = &tb->first_data; | |
1823 | ||
1824 | /* Step through the blocks from the oldest to the youngest. We | |
1825 | expect that old blocks will stabilize over time, so that less | |
1826 | copying will happen this way. */ | |
1827 | for (b = oldest_sblock; b; b = b->next) | |
1828 | { | |
1829 | end = b->next_free; | |
1830 | xassert ((char *) end <= (char *) b + SBLOCK_SIZE); | |
177c0ea7 | 1831 | |
2e471eb5 GM |
1832 | for (from = &b->first_data; from < end; from = from_end) |
1833 | { | |
1834 | /* Compute the next FROM here because copying below may | |
1835 | overwrite data we need to compute it. */ | |
1836 | int nbytes; | |
1837 | ||
31d929e5 GM |
1838 | #ifdef GC_CHECK_STRING_BYTES |
1839 | /* Check that the string size recorded in the string is the | |
1840 | same as the one recorded in the sdata structure. */ | |
1841 | if (from->string | |
1842 | && GC_STRING_BYTES (from->string) != SDATA_NBYTES (from)) | |
1843 | abort (); | |
1844 | #endif /* GC_CHECK_STRING_BYTES */ | |
177c0ea7 | 1845 | |
2e471eb5 GM |
1846 | if (from->string) |
1847 | nbytes = GC_STRING_BYTES (from->string); | |
1848 | else | |
31d929e5 | 1849 | nbytes = SDATA_NBYTES (from); |
177c0ea7 | 1850 | |
2e471eb5 GM |
1851 | nbytes = SDATA_SIZE (nbytes); |
1852 | from_end = (struct sdata *) ((char *) from + nbytes); | |
177c0ea7 | 1853 | |
2e471eb5 GM |
1854 | /* FROM->string non-null means it's alive. Copy its data. */ |
1855 | if (from->string) | |
1856 | { | |
1857 | /* If TB is full, proceed with the next sblock. */ | |
1858 | to_end = (struct sdata *) ((char *) to + nbytes); | |
1859 | if (to_end > tb_end) | |
1860 | { | |
1861 | tb->next_free = to; | |
1862 | tb = tb->next; | |
1863 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
1864 | to = &tb->first_data; | |
1865 | to_end = (struct sdata *) ((char *) to + nbytes); | |
1866 | } | |
177c0ea7 | 1867 | |
2e471eb5 GM |
1868 | /* Copy, and update the string's `data' pointer. */ |
1869 | if (from != to) | |
1870 | { | |
a2407477 GM |
1871 | xassert (tb != b || to <= from); |
1872 | safe_bcopy ((char *) from, (char *) to, nbytes); | |
31d929e5 | 1873 | to->string->data = SDATA_DATA (to); |
2e471eb5 GM |
1874 | } |
1875 | ||
1876 | /* Advance past the sdata we copied to. */ | |
1877 | to = to_end; | |
1878 | } | |
1879 | } | |
1880 | } | |
1881 | ||
1882 | /* The rest of the sblocks following TB don't contain live data, so | |
1883 | we can free them. */ | |
1884 | for (b = tb->next; b; b = next) | |
1885 | { | |
1886 | next = b->next; | |
1887 | lisp_free (b); | |
1888 | } | |
1889 | ||
1890 | tb->next_free = to; | |
1891 | tb->next = NULL; | |
1892 | current_sblock = tb; | |
1893 | } | |
1894 | ||
1895 | ||
1896 | DEFUN ("make-string", Fmake_string, Smake_string, 2, 2, 0, | |
69623621 RS |
1897 | doc: /* Return a newly created string of length LENGTH, with INIT in each element. |
1898 | LENGTH must be an integer. | |
1899 | INIT must be an integer that represents a character. */) | |
7ee72033 | 1900 | (length, init) |
2e471eb5 GM |
1901 | Lisp_Object length, init; |
1902 | { | |
1903 | register Lisp_Object val; | |
1904 | register unsigned char *p, *end; | |
1905 | int c, nbytes; | |
1906 | ||
b7826503 PJ |
1907 | CHECK_NATNUM (length); |
1908 | CHECK_NUMBER (init); | |
2e471eb5 GM |
1909 | |
1910 | c = XINT (init); | |
1911 | if (SINGLE_BYTE_CHAR_P (c)) | |
1912 | { | |
1913 | nbytes = XINT (length); | |
1914 | val = make_uninit_string (nbytes); | |
d5db4077 KR |
1915 | p = SDATA (val); |
1916 | end = p + SCHARS (val); | |
2e471eb5 GM |
1917 | while (p != end) |
1918 | *p++ = c; | |
1919 | } | |
1920 | else | |
1921 | { | |
d942b71c | 1922 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2e471eb5 GM |
1923 | int len = CHAR_STRING (c, str); |
1924 | ||
1925 | nbytes = len * XINT (length); | |
1926 | val = make_uninit_multibyte_string (XINT (length), nbytes); | |
d5db4077 | 1927 | p = SDATA (val); |
2e471eb5 GM |
1928 | end = p + nbytes; |
1929 | while (p != end) | |
1930 | { | |
1931 | bcopy (str, p, len); | |
1932 | p += len; | |
1933 | } | |
1934 | } | |
177c0ea7 | 1935 | |
2e471eb5 GM |
1936 | *p = 0; |
1937 | return val; | |
1938 | } | |
1939 | ||
1940 | ||
1941 | DEFUN ("make-bool-vector", Fmake_bool_vector, Smake_bool_vector, 2, 2, 0, | |
a6266d23 | 1942 | doc: /* Return a new bool-vector of length LENGTH, using INIT for as each element. |
7ee72033 MB |
1943 | LENGTH must be a number. INIT matters only in whether it is t or nil. */) |
1944 | (length, init) | |
2e471eb5 GM |
1945 | Lisp_Object length, init; |
1946 | { | |
1947 | register Lisp_Object val; | |
1948 | struct Lisp_Bool_Vector *p; | |
1949 | int real_init, i; | |
1950 | int length_in_chars, length_in_elts, bits_per_value; | |
1951 | ||
b7826503 | 1952 | CHECK_NATNUM (length); |
2e471eb5 | 1953 | |
a097329f | 1954 | bits_per_value = sizeof (EMACS_INT) * BOOL_VECTOR_BITS_PER_CHAR; |
2e471eb5 GM |
1955 | |
1956 | length_in_elts = (XFASTINT (length) + bits_per_value - 1) / bits_per_value; | |
a097329f AS |
1957 | length_in_chars = ((XFASTINT (length) + BOOL_VECTOR_BITS_PER_CHAR - 1) |
1958 | / BOOL_VECTOR_BITS_PER_CHAR); | |
2e471eb5 GM |
1959 | |
1960 | /* We must allocate one more elements than LENGTH_IN_ELTS for the | |
1961 | slot `size' of the struct Lisp_Bool_Vector. */ | |
1962 | val = Fmake_vector (make_number (length_in_elts + 1), Qnil); | |
1963 | p = XBOOL_VECTOR (val); | |
177c0ea7 | 1964 | |
2e471eb5 GM |
1965 | /* Get rid of any bits that would cause confusion. */ |
1966 | p->vector_size = 0; | |
1967 | XSETBOOL_VECTOR (val, p); | |
1968 | p->size = XFASTINT (length); | |
177c0ea7 | 1969 | |
2e471eb5 GM |
1970 | real_init = (NILP (init) ? 0 : -1); |
1971 | for (i = 0; i < length_in_chars ; i++) | |
1972 | p->data[i] = real_init; | |
177c0ea7 | 1973 | |
2e471eb5 | 1974 | /* Clear the extraneous bits in the last byte. */ |
a097329f | 1975 | if (XINT (length) != length_in_chars * BOOL_VECTOR_BITS_PER_CHAR) |
2e471eb5 | 1976 | XBOOL_VECTOR (val)->data[length_in_chars - 1] |
a097329f | 1977 | &= (1 << (XINT (length) % BOOL_VECTOR_BITS_PER_CHAR)) - 1; |
2e471eb5 GM |
1978 | |
1979 | return val; | |
1980 | } | |
1981 | ||
1982 | ||
1983 | /* Make a string from NBYTES bytes at CONTENTS, and compute the number | |
1984 | of characters from the contents. This string may be unibyte or | |
1985 | multibyte, depending on the contents. */ | |
1986 | ||
1987 | Lisp_Object | |
1988 | make_string (contents, nbytes) | |
943b873e | 1989 | const char *contents; |
2e471eb5 GM |
1990 | int nbytes; |
1991 | { | |
1992 | register Lisp_Object val; | |
9eac9d59 KH |
1993 | int nchars, multibyte_nbytes; |
1994 | ||
1995 | parse_str_as_multibyte (contents, nbytes, &nchars, &multibyte_nbytes); | |
9eac9d59 KH |
1996 | if (nbytes == nchars || nbytes != multibyte_nbytes) |
1997 | /* CONTENTS contains no multibyte sequences or contains an invalid | |
1998 | multibyte sequence. We must make unibyte string. */ | |
495a6df3 KH |
1999 | val = make_unibyte_string (contents, nbytes); |
2000 | else | |
2001 | val = make_multibyte_string (contents, nchars, nbytes); | |
2e471eb5 GM |
2002 | return val; |
2003 | } | |
2004 | ||
2005 | ||
2006 | /* Make an unibyte string from LENGTH bytes at CONTENTS. */ | |
2007 | ||
2008 | Lisp_Object | |
2009 | make_unibyte_string (contents, length) | |
943b873e | 2010 | const char *contents; |
2e471eb5 GM |
2011 | int length; |
2012 | { | |
2013 | register Lisp_Object val; | |
2014 | val = make_uninit_string (length); | |
d5db4077 KR |
2015 | bcopy (contents, SDATA (val), length); |
2016 | STRING_SET_UNIBYTE (val); | |
2e471eb5 GM |
2017 | return val; |
2018 | } | |
2019 | ||
2020 | ||
2021 | /* Make a multibyte string from NCHARS characters occupying NBYTES | |
2022 | bytes at CONTENTS. */ | |
2023 | ||
2024 | Lisp_Object | |
2025 | make_multibyte_string (contents, nchars, nbytes) | |
943b873e | 2026 | const char *contents; |
2e471eb5 GM |
2027 | int nchars, nbytes; |
2028 | { | |
2029 | register Lisp_Object val; | |
2030 | val = make_uninit_multibyte_string (nchars, nbytes); | |
d5db4077 | 2031 | bcopy (contents, SDATA (val), nbytes); |
2e471eb5 GM |
2032 | return val; |
2033 | } | |
2034 | ||
2035 | ||
2036 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
2037 | CONTENTS. It is a multibyte string if NBYTES != NCHARS. */ | |
2038 | ||
2039 | Lisp_Object | |
2040 | make_string_from_bytes (contents, nchars, nbytes) | |
fcbb914b | 2041 | const char *contents; |
2e471eb5 GM |
2042 | int nchars, nbytes; |
2043 | { | |
2044 | register Lisp_Object val; | |
2045 | val = make_uninit_multibyte_string (nchars, nbytes); | |
d5db4077 KR |
2046 | bcopy (contents, SDATA (val), nbytes); |
2047 | if (SBYTES (val) == SCHARS (val)) | |
2048 | STRING_SET_UNIBYTE (val); | |
2e471eb5 GM |
2049 | return val; |
2050 | } | |
2051 | ||
2052 | ||
2053 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
2054 | CONTENTS. The argument MULTIBYTE controls whether to label the | |
229b28c4 KH |
2055 | string as multibyte. If NCHARS is negative, it counts the number of |
2056 | characters by itself. */ | |
2e471eb5 GM |
2057 | |
2058 | Lisp_Object | |
2059 | make_specified_string (contents, nchars, nbytes, multibyte) | |
fcbb914b | 2060 | const char *contents; |
2e471eb5 GM |
2061 | int nchars, nbytes; |
2062 | int multibyte; | |
2063 | { | |
2064 | register Lisp_Object val; | |
229b28c4 KH |
2065 | |
2066 | if (nchars < 0) | |
2067 | { | |
2068 | if (multibyte) | |
2069 | nchars = multibyte_chars_in_text (contents, nbytes); | |
2070 | else | |
2071 | nchars = nbytes; | |
2072 | } | |
2e471eb5 | 2073 | val = make_uninit_multibyte_string (nchars, nbytes); |
d5db4077 | 2074 | bcopy (contents, SDATA (val), nbytes); |
2e471eb5 | 2075 | if (!multibyte) |
d5db4077 | 2076 | STRING_SET_UNIBYTE (val); |
2e471eb5 GM |
2077 | return val; |
2078 | } | |
2079 | ||
2080 | ||
2081 | /* Make a string from the data at STR, treating it as multibyte if the | |
2082 | data warrants. */ | |
2083 | ||
2084 | Lisp_Object | |
2085 | build_string (str) | |
943b873e | 2086 | const char *str; |
2e471eb5 GM |
2087 | { |
2088 | return make_string (str, strlen (str)); | |
2089 | } | |
2090 | ||
2091 | ||
2092 | /* Return an unibyte Lisp_String set up to hold LENGTH characters | |
2093 | occupying LENGTH bytes. */ | |
2094 | ||
2095 | Lisp_Object | |
2096 | make_uninit_string (length) | |
2097 | int length; | |
2098 | { | |
2099 | Lisp_Object val; | |
2100 | val = make_uninit_multibyte_string (length, length); | |
d5db4077 | 2101 | STRING_SET_UNIBYTE (val); |
2e471eb5 GM |
2102 | return val; |
2103 | } | |
2104 | ||
2105 | ||
2106 | /* Return a multibyte Lisp_String set up to hold NCHARS characters | |
2107 | which occupy NBYTES bytes. */ | |
2108 | ||
2109 | Lisp_Object | |
2110 | make_uninit_multibyte_string (nchars, nbytes) | |
2111 | int nchars, nbytes; | |
2112 | { | |
2113 | Lisp_Object string; | |
2114 | struct Lisp_String *s; | |
2115 | ||
2116 | if (nchars < 0) | |
2117 | abort (); | |
2118 | ||
2119 | s = allocate_string (); | |
2120 | allocate_string_data (s, nchars, nbytes); | |
2121 | XSETSTRING (string, s); | |
2122 | string_chars_consed += nbytes; | |
2123 | return string; | |
2124 | } | |
2125 | ||
2126 | ||
2127 | \f | |
2128 | /*********************************************************************** | |
2129 | Float Allocation | |
2130 | ***********************************************************************/ | |
2131 | ||
2e471eb5 GM |
2132 | /* We store float cells inside of float_blocks, allocating a new |
2133 | float_block with malloc whenever necessary. Float cells reclaimed | |
2134 | by GC are put on a free list to be reallocated before allocating | |
ab6780cd | 2135 | any new float cells from the latest float_block. */ |
2e471eb5 | 2136 | |
d05b383a SM |
2137 | #define FLOAT_BLOCK_SIZE \ |
2138 | (((BLOCK_BYTES - sizeof (struct float_block *) \ | |
2139 | /* The compiler might add padding at the end. */ \ | |
2140 | - (sizeof (struct Lisp_Float) - sizeof (int))) * CHAR_BIT) \ | |
ab6780cd SM |
2141 | / (sizeof (struct Lisp_Float) * CHAR_BIT + 1)) |
2142 | ||
2143 | #define GETMARKBIT(block,n) \ | |
2144 | (((block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2145 | >> ((n) % (sizeof(int) * CHAR_BIT))) \ | |
2146 | & 1) | |
2147 | ||
2148 | #define SETMARKBIT(block,n) \ | |
2149 | (block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2150 | |= 1 << ((n) % (sizeof(int) * CHAR_BIT)) | |
2151 | ||
2152 | #define UNSETMARKBIT(block,n) \ | |
2153 | (block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2154 | &= ~(1 << ((n) % (sizeof(int) * CHAR_BIT))) | |
2155 | ||
2156 | #define FLOAT_BLOCK(fptr) \ | |
2157 | ((struct float_block *)(((EMACS_UINT)(fptr)) & ~(BLOCK_ALIGN - 1))) | |
2158 | ||
2159 | #define FLOAT_INDEX(fptr) \ | |
2160 | ((((EMACS_UINT)(fptr)) & (BLOCK_ALIGN - 1)) / sizeof (struct Lisp_Float)) | |
2e471eb5 GM |
2161 | |
2162 | struct float_block | |
2163 | { | |
ab6780cd | 2164 | /* Place `floats' at the beginning, to ease up FLOAT_INDEX's job. */ |
2e471eb5 | 2165 | struct Lisp_Float floats[FLOAT_BLOCK_SIZE]; |
ab6780cd SM |
2166 | int gcmarkbits[1 + FLOAT_BLOCK_SIZE / (sizeof(int) * CHAR_BIT)]; |
2167 | struct float_block *next; | |
2e471eb5 GM |
2168 | }; |
2169 | ||
ab6780cd SM |
2170 | #define FLOAT_MARKED_P(fptr) \ |
2171 | GETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2172 | ||
2173 | #define FLOAT_MARK(fptr) \ | |
2174 | SETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2175 | ||
2176 | #define FLOAT_UNMARK(fptr) \ | |
2177 | UNSETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2178 | ||
34400008 GM |
2179 | /* Current float_block. */ |
2180 | ||
2e471eb5 | 2181 | struct float_block *float_block; |
34400008 GM |
2182 | |
2183 | /* Index of first unused Lisp_Float in the current float_block. */ | |
2184 | ||
2e471eb5 GM |
2185 | int float_block_index; |
2186 | ||
2187 | /* Total number of float blocks now in use. */ | |
2188 | ||
2189 | int n_float_blocks; | |
2190 | ||
34400008 GM |
2191 | /* Free-list of Lisp_Floats. */ |
2192 | ||
2e471eb5 GM |
2193 | struct Lisp_Float *float_free_list; |
2194 | ||
34400008 | 2195 | |
966533c9 | 2196 | /* Initialize float allocation. */ |
34400008 | 2197 | |
2e471eb5 GM |
2198 | void |
2199 | init_float () | |
2200 | { | |
08b7c2cb SM |
2201 | float_block = NULL; |
2202 | float_block_index = FLOAT_BLOCK_SIZE; /* Force alloc of new float_block. */ | |
2e471eb5 | 2203 | float_free_list = 0; |
08b7c2cb | 2204 | n_float_blocks = 0; |
2e471eb5 GM |
2205 | } |
2206 | ||
34400008 GM |
2207 | |
2208 | /* Explicitly free a float cell by putting it on the free-list. */ | |
2e471eb5 GM |
2209 | |
2210 | void | |
2211 | free_float (ptr) | |
2212 | struct Lisp_Float *ptr; | |
2213 | { | |
2214 | *(struct Lisp_Float **)&ptr->data = float_free_list; | |
2215 | float_free_list = ptr; | |
2216 | } | |
2217 | ||
34400008 GM |
2218 | |
2219 | /* Return a new float object with value FLOAT_VALUE. */ | |
2220 | ||
2e471eb5 GM |
2221 | Lisp_Object |
2222 | make_float (float_value) | |
2223 | double float_value; | |
2224 | { | |
2225 | register Lisp_Object val; | |
2226 | ||
2227 | if (float_free_list) | |
2228 | { | |
2229 | /* We use the data field for chaining the free list | |
2230 | so that we won't use the same field that has the mark bit. */ | |
2231 | XSETFLOAT (val, float_free_list); | |
2232 | float_free_list = *(struct Lisp_Float **)&float_free_list->data; | |
2233 | } | |
2234 | else | |
2235 | { | |
2236 | if (float_block_index == FLOAT_BLOCK_SIZE) | |
2237 | { | |
2238 | register struct float_block *new; | |
2239 | ||
ab6780cd SM |
2240 | new = (struct float_block *) lisp_align_malloc (sizeof *new, |
2241 | MEM_TYPE_FLOAT); | |
2e471eb5 | 2242 | new->next = float_block; |
a0668126 | 2243 | bzero ((char *) new->gcmarkbits, sizeof new->gcmarkbits); |
2e471eb5 GM |
2244 | float_block = new; |
2245 | float_block_index = 0; | |
2246 | n_float_blocks++; | |
2247 | } | |
a0668126 SM |
2248 | XSETFLOAT (val, &float_block->floats[float_block_index]); |
2249 | float_block_index++; | |
2e471eb5 | 2250 | } |
177c0ea7 | 2251 | |
2e471eb5 | 2252 | XFLOAT_DATA (val) = float_value; |
a0668126 | 2253 | eassert (!FLOAT_MARKED_P (XFLOAT (val))); |
2e471eb5 GM |
2254 | consing_since_gc += sizeof (struct Lisp_Float); |
2255 | floats_consed++; | |
2256 | return val; | |
2257 | } | |
2258 | ||
2e471eb5 GM |
2259 | |
2260 | \f | |
2261 | /*********************************************************************** | |
2262 | Cons Allocation | |
2263 | ***********************************************************************/ | |
2264 | ||
2265 | /* We store cons cells inside of cons_blocks, allocating a new | |
2266 | cons_block with malloc whenever necessary. Cons cells reclaimed by | |
2267 | GC are put on a free list to be reallocated before allocating | |
08b7c2cb | 2268 | any new cons cells from the latest cons_block. */ |
2e471eb5 GM |
2269 | |
2270 | #define CONS_BLOCK_SIZE \ | |
08b7c2cb SM |
2271 | (((BLOCK_BYTES - sizeof (struct cons_block *)) * CHAR_BIT) \ |
2272 | / (sizeof (struct Lisp_Cons) * CHAR_BIT + 1)) | |
2273 | ||
2274 | #define CONS_BLOCK(fptr) \ | |
2275 | ((struct cons_block *)(((EMACS_UINT)(fptr)) & ~(BLOCK_ALIGN - 1))) | |
2276 | ||
2277 | #define CONS_INDEX(fptr) \ | |
2278 | ((((EMACS_UINT)(fptr)) & (BLOCK_ALIGN - 1)) / sizeof (struct Lisp_Cons)) | |
2e471eb5 GM |
2279 | |
2280 | struct cons_block | |
2281 | { | |
08b7c2cb | 2282 | /* Place `conses' at the beginning, to ease up CONS_INDEX's job. */ |
2e471eb5 | 2283 | struct Lisp_Cons conses[CONS_BLOCK_SIZE]; |
08b7c2cb SM |
2284 | int gcmarkbits[1 + CONS_BLOCK_SIZE / (sizeof(int) * CHAR_BIT)]; |
2285 | struct cons_block *next; | |
2e471eb5 GM |
2286 | }; |
2287 | ||
08b7c2cb SM |
2288 | #define CONS_MARKED_P(fptr) \ |
2289 | GETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2290 | ||
2291 | #define CONS_MARK(fptr) \ | |
2292 | SETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2293 | ||
2294 | #define CONS_UNMARK(fptr) \ | |
2295 | UNSETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2296 | ||
34400008 GM |
2297 | /* Current cons_block. */ |
2298 | ||
2e471eb5 | 2299 | struct cons_block *cons_block; |
34400008 GM |
2300 | |
2301 | /* Index of first unused Lisp_Cons in the current block. */ | |
2302 | ||
2e471eb5 GM |
2303 | int cons_block_index; |
2304 | ||
34400008 GM |
2305 | /* Free-list of Lisp_Cons structures. */ |
2306 | ||
2e471eb5 GM |
2307 | struct Lisp_Cons *cons_free_list; |
2308 | ||
2309 | /* Total number of cons blocks now in use. */ | |
2310 | ||
2311 | int n_cons_blocks; | |
2312 | ||
34400008 GM |
2313 | |
2314 | /* Initialize cons allocation. */ | |
2315 | ||
2e471eb5 GM |
2316 | void |
2317 | init_cons () | |
2318 | { | |
08b7c2cb SM |
2319 | cons_block = NULL; |
2320 | cons_block_index = CONS_BLOCK_SIZE; /* Force alloc of new cons_block. */ | |
2e471eb5 | 2321 | cons_free_list = 0; |
08b7c2cb | 2322 | n_cons_blocks = 0; |
2e471eb5 GM |
2323 | } |
2324 | ||
34400008 GM |
2325 | |
2326 | /* Explicitly free a cons cell by putting it on the free-list. */ | |
2e471eb5 GM |
2327 | |
2328 | void | |
2329 | free_cons (ptr) | |
2330 | struct Lisp_Cons *ptr; | |
2331 | { | |
2332 | *(struct Lisp_Cons **)&ptr->cdr = cons_free_list; | |
34400008 GM |
2333 | #if GC_MARK_STACK |
2334 | ptr->car = Vdead; | |
2335 | #endif | |
2e471eb5 GM |
2336 | cons_free_list = ptr; |
2337 | } | |
2338 | ||
2339 | DEFUN ("cons", Fcons, Scons, 2, 2, 0, | |
a6266d23 | 2340 | doc: /* Create a new cons, give it CAR and CDR as components, and return it. */) |
7ee72033 | 2341 | (car, cdr) |
2e471eb5 GM |
2342 | Lisp_Object car, cdr; |
2343 | { | |
2344 | register Lisp_Object val; | |
2345 | ||
2346 | if (cons_free_list) | |
2347 | { | |
2348 | /* We use the cdr for chaining the free list | |
2349 | so that we won't use the same field that has the mark bit. */ | |
2350 | XSETCONS (val, cons_free_list); | |
2351 | cons_free_list = *(struct Lisp_Cons **)&cons_free_list->cdr; | |
2352 | } | |
2353 | else | |
2354 | { | |
2355 | if (cons_block_index == CONS_BLOCK_SIZE) | |
2356 | { | |
2357 | register struct cons_block *new; | |
08b7c2cb SM |
2358 | new = (struct cons_block *) lisp_align_malloc (sizeof *new, |
2359 | MEM_TYPE_CONS); | |
a0668126 | 2360 | bzero ((char *) new->gcmarkbits, sizeof new->gcmarkbits); |
2e471eb5 GM |
2361 | new->next = cons_block; |
2362 | cons_block = new; | |
2363 | cons_block_index = 0; | |
2364 | n_cons_blocks++; | |
2365 | } | |
a0668126 SM |
2366 | XSETCONS (val, &cons_block->conses[cons_block_index]); |
2367 | cons_block_index++; | |
2e471eb5 | 2368 | } |
177c0ea7 | 2369 | |
f3fbd155 KR |
2370 | XSETCAR (val, car); |
2371 | XSETCDR (val, cdr); | |
a0668126 | 2372 | eassert (!CONS_MARKED_P (XCONS (val))); |
2e471eb5 GM |
2373 | consing_since_gc += sizeof (struct Lisp_Cons); |
2374 | cons_cells_consed++; | |
2375 | return val; | |
2376 | } | |
2377 | ||
34400008 | 2378 | |
2e471eb5 GM |
2379 | /* Make a list of 2, 3, 4 or 5 specified objects. */ |
2380 | ||
2381 | Lisp_Object | |
2382 | list2 (arg1, arg2) | |
2383 | Lisp_Object arg1, arg2; | |
2384 | { | |
2385 | return Fcons (arg1, Fcons (arg2, Qnil)); | |
2386 | } | |
2387 | ||
34400008 | 2388 | |
2e471eb5 GM |
2389 | Lisp_Object |
2390 | list3 (arg1, arg2, arg3) | |
2391 | Lisp_Object arg1, arg2, arg3; | |
2392 | { | |
2393 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Qnil))); | |
2394 | } | |
2395 | ||
34400008 | 2396 | |
2e471eb5 GM |
2397 | Lisp_Object |
2398 | list4 (arg1, arg2, arg3, arg4) | |
2399 | Lisp_Object arg1, arg2, arg3, arg4; | |
2400 | { | |
2401 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, Qnil)))); | |
2402 | } | |
2403 | ||
34400008 | 2404 | |
2e471eb5 GM |
2405 | Lisp_Object |
2406 | list5 (arg1, arg2, arg3, arg4, arg5) | |
2407 | Lisp_Object arg1, arg2, arg3, arg4, arg5; | |
2408 | { | |
2409 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, | |
2410 | Fcons (arg5, Qnil))))); | |
2411 | } | |
2412 | ||
34400008 | 2413 | |
2e471eb5 | 2414 | DEFUN ("list", Flist, Slist, 0, MANY, 0, |
eae936e2 | 2415 | doc: /* Return a newly created list with specified arguments as elements. |
ae8e8122 MB |
2416 | Any number of arguments, even zero arguments, are allowed. |
2417 | usage: (list &rest OBJECTS) */) | |
7ee72033 | 2418 | (nargs, args) |
2e471eb5 GM |
2419 | int nargs; |
2420 | register Lisp_Object *args; | |
2421 | { | |
2422 | register Lisp_Object val; | |
2423 | val = Qnil; | |
2424 | ||
2425 | while (nargs > 0) | |
2426 | { | |
2427 | nargs--; | |
2428 | val = Fcons (args[nargs], val); | |
2429 | } | |
2430 | return val; | |
2431 | } | |
2432 | ||
34400008 | 2433 | |
2e471eb5 | 2434 | DEFUN ("make-list", Fmake_list, Smake_list, 2, 2, 0, |
a6266d23 | 2435 | doc: /* Return a newly created list of length LENGTH, with each element being INIT. */) |
7ee72033 | 2436 | (length, init) |
2e471eb5 GM |
2437 | register Lisp_Object length, init; |
2438 | { | |
2439 | register Lisp_Object val; | |
2440 | register int size; | |
2441 | ||
b7826503 | 2442 | CHECK_NATNUM (length); |
2e471eb5 GM |
2443 | size = XFASTINT (length); |
2444 | ||
2445 | val = Qnil; | |
ce070307 GM |
2446 | while (size > 0) |
2447 | { | |
2448 | val = Fcons (init, val); | |
2449 | --size; | |
2450 | ||
2451 | if (size > 0) | |
2452 | { | |
2453 | val = Fcons (init, val); | |
2454 | --size; | |
177c0ea7 | 2455 | |
ce070307 GM |
2456 | if (size > 0) |
2457 | { | |
2458 | val = Fcons (init, val); | |
2459 | --size; | |
177c0ea7 | 2460 | |
ce070307 GM |
2461 | if (size > 0) |
2462 | { | |
2463 | val = Fcons (init, val); | |
2464 | --size; | |
177c0ea7 | 2465 | |
ce070307 GM |
2466 | if (size > 0) |
2467 | { | |
2468 | val = Fcons (init, val); | |
2469 | --size; | |
2470 | } | |
2471 | } | |
2472 | } | |
2473 | } | |
2474 | ||
2475 | QUIT; | |
2476 | } | |
177c0ea7 | 2477 | |
7146af97 JB |
2478 | return val; |
2479 | } | |
2e471eb5 GM |
2480 | |
2481 | ||
7146af97 | 2482 | \f |
2e471eb5 GM |
2483 | /*********************************************************************** |
2484 | Vector Allocation | |
2485 | ***********************************************************************/ | |
7146af97 | 2486 | |
34400008 GM |
2487 | /* Singly-linked list of all vectors. */ |
2488 | ||
7146af97 JB |
2489 | struct Lisp_Vector *all_vectors; |
2490 | ||
2e471eb5 GM |
2491 | /* Total number of vector-like objects now in use. */ |
2492 | ||
c8099634 RS |
2493 | int n_vectors; |
2494 | ||
34400008 GM |
2495 | |
2496 | /* Value is a pointer to a newly allocated Lisp_Vector structure | |
2497 | with room for LEN Lisp_Objects. */ | |
2498 | ||
ece93c02 GM |
2499 | static struct Lisp_Vector * |
2500 | allocate_vectorlike (len, type) | |
1825c68d | 2501 | EMACS_INT len; |
ece93c02 | 2502 | enum mem_type type; |
1825c68d KH |
2503 | { |
2504 | struct Lisp_Vector *p; | |
675d5130 | 2505 | size_t nbytes; |
1825c68d | 2506 | |
d1658221 | 2507 | #ifdef DOUG_LEA_MALLOC |
f8608968 GM |
2508 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
2509 | because mapped region contents are not preserved in | |
2510 | a dumped Emacs. */ | |
de7515d6 | 2511 | BLOCK_INPUT; |
d1658221 | 2512 | mallopt (M_MMAP_MAX, 0); |
de7515d6 | 2513 | UNBLOCK_INPUT; |
d1658221 | 2514 | #endif |
177c0ea7 | 2515 | |
34400008 | 2516 | nbytes = sizeof *p + (len - 1) * sizeof p->contents[0]; |
ece93c02 | 2517 | p = (struct Lisp_Vector *) lisp_malloc (nbytes, type); |
177c0ea7 | 2518 | |
d1658221 | 2519 | #ifdef DOUG_LEA_MALLOC |
34400008 | 2520 | /* Back to a reasonable maximum of mmap'ed areas. */ |
de7515d6 | 2521 | BLOCK_INPUT; |
81d492d5 | 2522 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); |
de7515d6 | 2523 | UNBLOCK_INPUT; |
d1658221 | 2524 | #endif |
177c0ea7 | 2525 | |
34400008 | 2526 | consing_since_gc += nbytes; |
310ea200 | 2527 | vector_cells_consed += len; |
1825c68d KH |
2528 | |
2529 | p->next = all_vectors; | |
2530 | all_vectors = p; | |
34400008 | 2531 | ++n_vectors; |
1825c68d KH |
2532 | return p; |
2533 | } | |
2534 | ||
34400008 | 2535 | |
ece93c02 GM |
2536 | /* Allocate a vector with NSLOTS slots. */ |
2537 | ||
2538 | struct Lisp_Vector * | |
2539 | allocate_vector (nslots) | |
2540 | EMACS_INT nslots; | |
2541 | { | |
2542 | struct Lisp_Vector *v = allocate_vectorlike (nslots, MEM_TYPE_VECTOR); | |
2543 | v->size = nslots; | |
2544 | return v; | |
2545 | } | |
2546 | ||
2547 | ||
2548 | /* Allocate other vector-like structures. */ | |
2549 | ||
2550 | struct Lisp_Hash_Table * | |
2551 | allocate_hash_table () | |
2552 | { | |
2553 | EMACS_INT len = VECSIZE (struct Lisp_Hash_Table); | |
2554 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_HASH_TABLE); | |
2555 | EMACS_INT i; | |
177c0ea7 | 2556 | |
ece93c02 GM |
2557 | v->size = len; |
2558 | for (i = 0; i < len; ++i) | |
2559 | v->contents[i] = Qnil; | |
177c0ea7 | 2560 | |
ece93c02 GM |
2561 | return (struct Lisp_Hash_Table *) v; |
2562 | } | |
2563 | ||
2564 | ||
2565 | struct window * | |
2566 | allocate_window () | |
2567 | { | |
2568 | EMACS_INT len = VECSIZE (struct window); | |
2569 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_WINDOW); | |
2570 | EMACS_INT i; | |
177c0ea7 | 2571 | |
ece93c02 GM |
2572 | for (i = 0; i < len; ++i) |
2573 | v->contents[i] = Qnil; | |
2574 | v->size = len; | |
177c0ea7 | 2575 | |
ece93c02 GM |
2576 | return (struct window *) v; |
2577 | } | |
2578 | ||
2579 | ||
2580 | struct frame * | |
2581 | allocate_frame () | |
2582 | { | |
2583 | EMACS_INT len = VECSIZE (struct frame); | |
2584 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_FRAME); | |
2585 | EMACS_INT i; | |
177c0ea7 | 2586 | |
ece93c02 GM |
2587 | for (i = 0; i < len; ++i) |
2588 | v->contents[i] = make_number (0); | |
2589 | v->size = len; | |
2590 | return (struct frame *) v; | |
2591 | } | |
2592 | ||
2593 | ||
2594 | struct Lisp_Process * | |
2595 | allocate_process () | |
2596 | { | |
2597 | EMACS_INT len = VECSIZE (struct Lisp_Process); | |
2598 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_PROCESS); | |
2599 | EMACS_INT i; | |
177c0ea7 | 2600 | |
ece93c02 GM |
2601 | for (i = 0; i < len; ++i) |
2602 | v->contents[i] = Qnil; | |
2603 | v->size = len; | |
177c0ea7 | 2604 | |
ece93c02 GM |
2605 | return (struct Lisp_Process *) v; |
2606 | } | |
2607 | ||
2608 | ||
2609 | struct Lisp_Vector * | |
2610 | allocate_other_vector (len) | |
2611 | EMACS_INT len; | |
2612 | { | |
2613 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_VECTOR); | |
2614 | EMACS_INT i; | |
177c0ea7 | 2615 | |
ece93c02 GM |
2616 | for (i = 0; i < len; ++i) |
2617 | v->contents[i] = Qnil; | |
2618 | v->size = len; | |
177c0ea7 | 2619 | |
ece93c02 GM |
2620 | return v; |
2621 | } | |
2622 | ||
2623 | ||
7146af97 | 2624 | DEFUN ("make-vector", Fmake_vector, Smake_vector, 2, 2, 0, |
a6266d23 | 2625 | doc: /* Return a newly created vector of length LENGTH, with each element being INIT. |
7ee72033 MB |
2626 | See also the function `vector'. */) |
2627 | (length, init) | |
7146af97 JB |
2628 | register Lisp_Object length, init; |
2629 | { | |
1825c68d KH |
2630 | Lisp_Object vector; |
2631 | register EMACS_INT sizei; | |
2632 | register int index; | |
7146af97 JB |
2633 | register struct Lisp_Vector *p; |
2634 | ||
b7826503 | 2635 | CHECK_NATNUM (length); |
c9dad5ed | 2636 | sizei = XFASTINT (length); |
7146af97 | 2637 | |
ece93c02 | 2638 | p = allocate_vector (sizei); |
7146af97 JB |
2639 | for (index = 0; index < sizei; index++) |
2640 | p->contents[index] = init; | |
2641 | ||
1825c68d | 2642 | XSETVECTOR (vector, p); |
7146af97 JB |
2643 | return vector; |
2644 | } | |
2645 | ||
34400008 | 2646 | |
a59de17b | 2647 | DEFUN ("make-char-table", Fmake_char_table, Smake_char_table, 1, 2, 0, |
a6266d23 | 2648 | doc: /* Return a newly created char-table, with purpose PURPOSE. |
228299fa GM |
2649 | Each element is initialized to INIT, which defaults to nil. |
2650 | PURPOSE should be a symbol which has a `char-table-extra-slots' property. | |
7ee72033 MB |
2651 | The property's value should be an integer between 0 and 10. */) |
2652 | (purpose, init) | |
a59de17b | 2653 | register Lisp_Object purpose, init; |
7b07587b RS |
2654 | { |
2655 | Lisp_Object vector; | |
a59de17b | 2656 | Lisp_Object n; |
b7826503 | 2657 | CHECK_SYMBOL (purpose); |
0551bde3 | 2658 | n = Fget (purpose, Qchar_table_extra_slots); |
b7826503 | 2659 | CHECK_NUMBER (n); |
7b07587b RS |
2660 | if (XINT (n) < 0 || XINT (n) > 10) |
2661 | args_out_of_range (n, Qnil); | |
2662 | /* Add 2 to the size for the defalt and parent slots. */ | |
2663 | vector = Fmake_vector (make_number (CHAR_TABLE_STANDARD_SLOTS + XINT (n)), | |
2664 | init); | |
0551bde3 | 2665 | XCHAR_TABLE (vector)->top = Qt; |
c96a008c | 2666 | XCHAR_TABLE (vector)->parent = Qnil; |
a59de17b | 2667 | XCHAR_TABLE (vector)->purpose = purpose; |
7b07587b RS |
2668 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); |
2669 | return vector; | |
2670 | } | |
2671 | ||
34400008 | 2672 | |
0551bde3 KH |
2673 | /* Return a newly created sub char table with default value DEFALT. |
2674 | Since a sub char table does not appear as a top level Emacs Lisp | |
2675 | object, we don't need a Lisp interface to make it. */ | |
2676 | ||
2677 | Lisp_Object | |
2678 | make_sub_char_table (defalt) | |
2679 | Lisp_Object defalt; | |
2680 | { | |
2681 | Lisp_Object vector | |
2682 | = Fmake_vector (make_number (SUB_CHAR_TABLE_STANDARD_SLOTS), Qnil); | |
2683 | XCHAR_TABLE (vector)->top = Qnil; | |
2684 | XCHAR_TABLE (vector)->defalt = defalt; | |
2685 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); | |
2686 | return vector; | |
2687 | } | |
2688 | ||
34400008 | 2689 | |
7146af97 | 2690 | DEFUN ("vector", Fvector, Svector, 0, MANY, 0, |
eae936e2 | 2691 | doc: /* Return a newly created vector with specified arguments as elements. |
ae8e8122 MB |
2692 | Any number of arguments, even zero arguments, are allowed. |
2693 | usage: (vector &rest OBJECTS) */) | |
7ee72033 | 2694 | (nargs, args) |
7146af97 JB |
2695 | register int nargs; |
2696 | Lisp_Object *args; | |
2697 | { | |
2698 | register Lisp_Object len, val; | |
2699 | register int index; | |
2700 | register struct Lisp_Vector *p; | |
2701 | ||
67ba9986 | 2702 | XSETFASTINT (len, nargs); |
7146af97 JB |
2703 | val = Fmake_vector (len, Qnil); |
2704 | p = XVECTOR (val); | |
2705 | for (index = 0; index < nargs; index++) | |
2706 | p->contents[index] = args[index]; | |
2707 | return val; | |
2708 | } | |
2709 | ||
34400008 | 2710 | |
7146af97 | 2711 | DEFUN ("make-byte-code", Fmake_byte_code, Smake_byte_code, 4, MANY, 0, |
a6266d23 | 2712 | doc: /* Create a byte-code object with specified arguments as elements. |
228299fa GM |
2713 | The arguments should be the arglist, bytecode-string, constant vector, |
2714 | stack size, (optional) doc string, and (optional) interactive spec. | |
2715 | The first four arguments are required; at most six have any | |
ae8e8122 | 2716 | significance. |
92cc28b2 | 2717 | usage: (make-byte-code ARGLIST BYTE-CODE CONSTANTS DEPTH &optional DOCSTRING INTERACTIVE-SPEC &rest ELEMENTS) */) |
7ee72033 | 2718 | (nargs, args) |
7146af97 JB |
2719 | register int nargs; |
2720 | Lisp_Object *args; | |
2721 | { | |
2722 | register Lisp_Object len, val; | |
2723 | register int index; | |
2724 | register struct Lisp_Vector *p; | |
2725 | ||
67ba9986 | 2726 | XSETFASTINT (len, nargs); |
265a9e55 | 2727 | if (!NILP (Vpurify_flag)) |
5a053ea9 | 2728 | val = make_pure_vector ((EMACS_INT) nargs); |
7146af97 JB |
2729 | else |
2730 | val = Fmake_vector (len, Qnil); | |
9eac9d59 KH |
2731 | |
2732 | if (STRINGP (args[1]) && STRING_MULTIBYTE (args[1])) | |
2733 | /* BYTECODE-STRING must have been produced by Emacs 20.2 or the | |
2734 | earlier because they produced a raw 8-bit string for byte-code | |
2735 | and now such a byte-code string is loaded as multibyte while | |
2736 | raw 8-bit characters converted to multibyte form. Thus, now we | |
2737 | must convert them back to the original unibyte form. */ | |
2738 | args[1] = Fstring_as_unibyte (args[1]); | |
2739 | ||
7146af97 JB |
2740 | p = XVECTOR (val); |
2741 | for (index = 0; index < nargs; index++) | |
2742 | { | |
265a9e55 | 2743 | if (!NILP (Vpurify_flag)) |
7146af97 JB |
2744 | args[index] = Fpurecopy (args[index]); |
2745 | p->contents[index] = args[index]; | |
2746 | } | |
50aee051 | 2747 | XSETCOMPILED (val, p); |
7146af97 JB |
2748 | return val; |
2749 | } | |
2e471eb5 | 2750 | |
34400008 | 2751 | |
7146af97 | 2752 | \f |
2e471eb5 GM |
2753 | /*********************************************************************** |
2754 | Symbol Allocation | |
2755 | ***********************************************************************/ | |
7146af97 | 2756 | |
2e471eb5 GM |
2757 | /* Each symbol_block is just under 1020 bytes long, since malloc |
2758 | really allocates in units of powers of two and uses 4 bytes for its | |
2759 | own overhead. */ | |
7146af97 JB |
2760 | |
2761 | #define SYMBOL_BLOCK_SIZE \ | |
2762 | ((1020 - sizeof (struct symbol_block *)) / sizeof (struct Lisp_Symbol)) | |
2763 | ||
2764 | struct symbol_block | |
2e471eb5 | 2765 | { |
d05b383a | 2766 | /* Place `symbols' first, to preserve alignment. */ |
2e471eb5 | 2767 | struct Lisp_Symbol symbols[SYMBOL_BLOCK_SIZE]; |
d05b383a | 2768 | struct symbol_block *next; |
2e471eb5 | 2769 | }; |
7146af97 | 2770 | |
34400008 GM |
2771 | /* Current symbol block and index of first unused Lisp_Symbol |
2772 | structure in it. */ | |
2773 | ||
7146af97 JB |
2774 | struct symbol_block *symbol_block; |
2775 | int symbol_block_index; | |
2776 | ||
34400008 GM |
2777 | /* List of free symbols. */ |
2778 | ||
7146af97 JB |
2779 | struct Lisp_Symbol *symbol_free_list; |
2780 | ||
c8099634 | 2781 | /* Total number of symbol blocks now in use. */ |
2e471eb5 | 2782 | |
c8099634 RS |
2783 | int n_symbol_blocks; |
2784 | ||
34400008 GM |
2785 | |
2786 | /* Initialize symbol allocation. */ | |
2787 | ||
7146af97 JB |
2788 | void |
2789 | init_symbol () | |
2790 | { | |
0930c1a1 SM |
2791 | symbol_block = NULL; |
2792 | symbol_block_index = SYMBOL_BLOCK_SIZE; | |
7146af97 | 2793 | symbol_free_list = 0; |
0930c1a1 | 2794 | n_symbol_blocks = 0; |
7146af97 JB |
2795 | } |
2796 | ||
34400008 | 2797 | |
7146af97 | 2798 | DEFUN ("make-symbol", Fmake_symbol, Smake_symbol, 1, 1, 0, |
a6266d23 | 2799 | doc: /* Return a newly allocated uninterned symbol whose name is NAME. |
7ee72033 MB |
2800 | Its value and function definition are void, and its property list is nil. */) |
2801 | (name) | |
54ee42dd | 2802 | Lisp_Object name; |
7146af97 JB |
2803 | { |
2804 | register Lisp_Object val; | |
2805 | register struct Lisp_Symbol *p; | |
2806 | ||
b7826503 | 2807 | CHECK_STRING (name); |
7146af97 JB |
2808 | |
2809 | if (symbol_free_list) | |
2810 | { | |
45d12a89 | 2811 | XSETSYMBOL (val, symbol_free_list); |
85481507 | 2812 | symbol_free_list = *(struct Lisp_Symbol **)&symbol_free_list->value; |
7146af97 JB |
2813 | } |
2814 | else | |
2815 | { | |
2816 | if (symbol_block_index == SYMBOL_BLOCK_SIZE) | |
2817 | { | |
3c06d205 | 2818 | struct symbol_block *new; |
34400008 GM |
2819 | new = (struct symbol_block *) lisp_malloc (sizeof *new, |
2820 | MEM_TYPE_SYMBOL); | |
7146af97 JB |
2821 | new->next = symbol_block; |
2822 | symbol_block = new; | |
2823 | symbol_block_index = 0; | |
c8099634 | 2824 | n_symbol_blocks++; |
7146af97 | 2825 | } |
a0668126 SM |
2826 | XSETSYMBOL (val, &symbol_block->symbols[symbol_block_index]); |
2827 | symbol_block_index++; | |
7146af97 | 2828 | } |
177c0ea7 | 2829 | |
7146af97 | 2830 | p = XSYMBOL (val); |
8fe5665d | 2831 | p->xname = name; |
7146af97 | 2832 | p->plist = Qnil; |
2e471eb5 GM |
2833 | p->value = Qunbound; |
2834 | p->function = Qunbound; | |
9e713715 | 2835 | p->next = NULL; |
2336fe58 | 2836 | p->gcmarkbit = 0; |
9e713715 GM |
2837 | p->interned = SYMBOL_UNINTERNED; |
2838 | p->constant = 0; | |
2839 | p->indirect_variable = 0; | |
2e471eb5 GM |
2840 | consing_since_gc += sizeof (struct Lisp_Symbol); |
2841 | symbols_consed++; | |
7146af97 JB |
2842 | return val; |
2843 | } | |
2844 | ||
3f25e183 | 2845 | |
2e471eb5 GM |
2846 | \f |
2847 | /*********************************************************************** | |
34400008 | 2848 | Marker (Misc) Allocation |
2e471eb5 | 2849 | ***********************************************************************/ |
3f25e183 | 2850 | |
2e471eb5 GM |
2851 | /* Allocation of markers and other objects that share that structure. |
2852 | Works like allocation of conses. */ | |
c0696668 | 2853 | |
2e471eb5 GM |
2854 | #define MARKER_BLOCK_SIZE \ |
2855 | ((1020 - sizeof (struct marker_block *)) / sizeof (union Lisp_Misc)) | |
2856 | ||
2857 | struct marker_block | |
c0696668 | 2858 | { |
d05b383a | 2859 | /* Place `markers' first, to preserve alignment. */ |
2e471eb5 | 2860 | union Lisp_Misc markers[MARKER_BLOCK_SIZE]; |
d05b383a | 2861 | struct marker_block *next; |
2e471eb5 | 2862 | }; |
c0696668 | 2863 | |
2e471eb5 GM |
2864 | struct marker_block *marker_block; |
2865 | int marker_block_index; | |
c0696668 | 2866 | |
2e471eb5 | 2867 | union Lisp_Misc *marker_free_list; |
c0696668 | 2868 | |
2e471eb5 | 2869 | /* Total number of marker blocks now in use. */ |
3f25e183 | 2870 | |
2e471eb5 GM |
2871 | int n_marker_blocks; |
2872 | ||
2873 | void | |
2874 | init_marker () | |
3f25e183 | 2875 | { |
0930c1a1 SM |
2876 | marker_block = NULL; |
2877 | marker_block_index = MARKER_BLOCK_SIZE; | |
2e471eb5 | 2878 | marker_free_list = 0; |
0930c1a1 | 2879 | n_marker_blocks = 0; |
3f25e183 RS |
2880 | } |
2881 | ||
2e471eb5 GM |
2882 | /* Return a newly allocated Lisp_Misc object, with no substructure. */ |
2883 | ||
3f25e183 | 2884 | Lisp_Object |
2e471eb5 | 2885 | allocate_misc () |
7146af97 | 2886 | { |
2e471eb5 | 2887 | Lisp_Object val; |
7146af97 | 2888 | |
2e471eb5 | 2889 | if (marker_free_list) |
7146af97 | 2890 | { |
2e471eb5 GM |
2891 | XSETMISC (val, marker_free_list); |
2892 | marker_free_list = marker_free_list->u_free.chain; | |
7146af97 JB |
2893 | } |
2894 | else | |
7146af97 | 2895 | { |
2e471eb5 GM |
2896 | if (marker_block_index == MARKER_BLOCK_SIZE) |
2897 | { | |
2898 | struct marker_block *new; | |
34400008 GM |
2899 | new = (struct marker_block *) lisp_malloc (sizeof *new, |
2900 | MEM_TYPE_MISC); | |
2e471eb5 GM |
2901 | new->next = marker_block; |
2902 | marker_block = new; | |
2903 | marker_block_index = 0; | |
2904 | n_marker_blocks++; | |
2905 | } | |
a0668126 SM |
2906 | XSETMISC (val, &marker_block->markers[marker_block_index]); |
2907 | marker_block_index++; | |
7146af97 | 2908 | } |
177c0ea7 | 2909 | |
2e471eb5 GM |
2910 | consing_since_gc += sizeof (union Lisp_Misc); |
2911 | misc_objects_consed++; | |
2336fe58 | 2912 | XMARKER (val)->gcmarkbit = 0; |
2e471eb5 GM |
2913 | return val; |
2914 | } | |
2915 | ||
42172a6b RS |
2916 | /* Return a Lisp_Misc_Save_Value object containing POINTER and |
2917 | INTEGER. This is used to package C values to call record_unwind_protect. | |
2918 | The unwind function can get the C values back using XSAVE_VALUE. */ | |
2919 | ||
2920 | Lisp_Object | |
2921 | make_save_value (pointer, integer) | |
2922 | void *pointer; | |
2923 | int integer; | |
2924 | { | |
2925 | register Lisp_Object val; | |
2926 | register struct Lisp_Save_Value *p; | |
2927 | ||
2928 | val = allocate_misc (); | |
2929 | XMISCTYPE (val) = Lisp_Misc_Save_Value; | |
2930 | p = XSAVE_VALUE (val); | |
2931 | p->pointer = pointer; | |
2932 | p->integer = integer; | |
2933 | return val; | |
2934 | } | |
2935 | ||
2e471eb5 | 2936 | DEFUN ("make-marker", Fmake_marker, Smake_marker, 0, 0, 0, |
a6266d23 | 2937 | doc: /* Return a newly allocated marker which does not point at any place. */) |
7ee72033 | 2938 | () |
2e471eb5 GM |
2939 | { |
2940 | register Lisp_Object val; | |
2941 | register struct Lisp_Marker *p; | |
7146af97 | 2942 | |
2e471eb5 GM |
2943 | val = allocate_misc (); |
2944 | XMISCTYPE (val) = Lisp_Misc_Marker; | |
2945 | p = XMARKER (val); | |
2946 | p->buffer = 0; | |
2947 | p->bytepos = 0; | |
2948 | p->charpos = 0; | |
ef89c2ce | 2949 | p->next = NULL; |
2e471eb5 | 2950 | p->insertion_type = 0; |
7146af97 JB |
2951 | return val; |
2952 | } | |
2e471eb5 GM |
2953 | |
2954 | /* Put MARKER back on the free list after using it temporarily. */ | |
2955 | ||
2956 | void | |
2957 | free_marker (marker) | |
2958 | Lisp_Object marker; | |
2959 | { | |
ef89c2ce | 2960 | unchain_marker (XMARKER (marker)); |
2e471eb5 GM |
2961 | |
2962 | XMISC (marker)->u_marker.type = Lisp_Misc_Free; | |
2963 | XMISC (marker)->u_free.chain = marker_free_list; | |
2964 | marker_free_list = XMISC (marker); | |
2965 | ||
2966 | total_free_markers++; | |
2967 | } | |
2968 | ||
c0696668 | 2969 | \f |
7146af97 | 2970 | /* Return a newly created vector or string with specified arguments as |
736471d1 RS |
2971 | elements. If all the arguments are characters that can fit |
2972 | in a string of events, make a string; otherwise, make a vector. | |
2973 | ||
2974 | Any number of arguments, even zero arguments, are allowed. */ | |
7146af97 JB |
2975 | |
2976 | Lisp_Object | |
736471d1 | 2977 | make_event_array (nargs, args) |
7146af97 JB |
2978 | register int nargs; |
2979 | Lisp_Object *args; | |
2980 | { | |
2981 | int i; | |
2982 | ||
2983 | for (i = 0; i < nargs; i++) | |
736471d1 | 2984 | /* The things that fit in a string |
c9ca4659 RS |
2985 | are characters that are in 0...127, |
2986 | after discarding the meta bit and all the bits above it. */ | |
e687453f | 2987 | if (!INTEGERP (args[i]) |
c9ca4659 | 2988 | || (XUINT (args[i]) & ~(-CHAR_META)) >= 0200) |
7146af97 JB |
2989 | return Fvector (nargs, args); |
2990 | ||
2991 | /* Since the loop exited, we know that all the things in it are | |
2992 | characters, so we can make a string. */ | |
2993 | { | |
c13ccad2 | 2994 | Lisp_Object result; |
177c0ea7 | 2995 | |
50aee051 | 2996 | result = Fmake_string (make_number (nargs), make_number (0)); |
7146af97 | 2997 | for (i = 0; i < nargs; i++) |
736471d1 | 2998 | { |
46e7e6b0 | 2999 | SSET (result, i, XINT (args[i])); |
736471d1 RS |
3000 | /* Move the meta bit to the right place for a string char. */ |
3001 | if (XINT (args[i]) & CHAR_META) | |
46e7e6b0 | 3002 | SSET (result, i, SREF (result, i) | 0x80); |
736471d1 | 3003 | } |
177c0ea7 | 3004 | |
7146af97 JB |
3005 | return result; |
3006 | } | |
3007 | } | |
2e471eb5 GM |
3008 | |
3009 | ||
7146af97 | 3010 | \f |
34400008 GM |
3011 | /************************************************************************ |
3012 | C Stack Marking | |
3013 | ************************************************************************/ | |
3014 | ||
13c844fb GM |
3015 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
3016 | ||
71cf5fa0 GM |
3017 | /* Conservative C stack marking requires a method to identify possibly |
3018 | live Lisp objects given a pointer value. We do this by keeping | |
3019 | track of blocks of Lisp data that are allocated in a red-black tree | |
3020 | (see also the comment of mem_node which is the type of nodes in | |
3021 | that tree). Function lisp_malloc adds information for an allocated | |
3022 | block to the red-black tree with calls to mem_insert, and function | |
3023 | lisp_free removes it with mem_delete. Functions live_string_p etc | |
3024 | call mem_find to lookup information about a given pointer in the | |
3025 | tree, and use that to determine if the pointer points to a Lisp | |
3026 | object or not. */ | |
3027 | ||
34400008 GM |
3028 | /* Initialize this part of alloc.c. */ |
3029 | ||
3030 | static void | |
3031 | mem_init () | |
3032 | { | |
3033 | mem_z.left = mem_z.right = MEM_NIL; | |
3034 | mem_z.parent = NULL; | |
3035 | mem_z.color = MEM_BLACK; | |
3036 | mem_z.start = mem_z.end = NULL; | |
3037 | mem_root = MEM_NIL; | |
3038 | } | |
3039 | ||
3040 | ||
3041 | /* Value is a pointer to the mem_node containing START. Value is | |
3042 | MEM_NIL if there is no node in the tree containing START. */ | |
3043 | ||
3044 | static INLINE struct mem_node * | |
3045 | mem_find (start) | |
3046 | void *start; | |
3047 | { | |
3048 | struct mem_node *p; | |
3049 | ||
ece93c02 GM |
3050 | if (start < min_heap_address || start > max_heap_address) |
3051 | return MEM_NIL; | |
3052 | ||
34400008 GM |
3053 | /* Make the search always successful to speed up the loop below. */ |
3054 | mem_z.start = start; | |
3055 | mem_z.end = (char *) start + 1; | |
3056 | ||
3057 | p = mem_root; | |
3058 | while (start < p->start || start >= p->end) | |
3059 | p = start < p->start ? p->left : p->right; | |
3060 | return p; | |
3061 | } | |
3062 | ||
3063 | ||
3064 | /* Insert a new node into the tree for a block of memory with start | |
3065 | address START, end address END, and type TYPE. Value is a | |
3066 | pointer to the node that was inserted. */ | |
3067 | ||
3068 | static struct mem_node * | |
3069 | mem_insert (start, end, type) | |
3070 | void *start, *end; | |
3071 | enum mem_type type; | |
3072 | { | |
3073 | struct mem_node *c, *parent, *x; | |
3074 | ||
ece93c02 GM |
3075 | if (start < min_heap_address) |
3076 | min_heap_address = start; | |
3077 | if (end > max_heap_address) | |
3078 | max_heap_address = end; | |
3079 | ||
34400008 GM |
3080 | /* See where in the tree a node for START belongs. In this |
3081 | particular application, it shouldn't happen that a node is already | |
3082 | present. For debugging purposes, let's check that. */ | |
3083 | c = mem_root; | |
3084 | parent = NULL; | |
3085 | ||
3086 | #if GC_MARK_STACK != GC_MAKE_GCPROS_NOOPS | |
177c0ea7 | 3087 | |
34400008 GM |
3088 | while (c != MEM_NIL) |
3089 | { | |
3090 | if (start >= c->start && start < c->end) | |
3091 | abort (); | |
3092 | parent = c; | |
3093 | c = start < c->start ? c->left : c->right; | |
3094 | } | |
177c0ea7 | 3095 | |
34400008 | 3096 | #else /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ |
177c0ea7 | 3097 | |
34400008 GM |
3098 | while (c != MEM_NIL) |
3099 | { | |
3100 | parent = c; | |
3101 | c = start < c->start ? c->left : c->right; | |
3102 | } | |
177c0ea7 | 3103 | |
34400008 GM |
3104 | #endif /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ |
3105 | ||
3106 | /* Create a new node. */ | |
877935b1 GM |
3107 | #ifdef GC_MALLOC_CHECK |
3108 | x = (struct mem_node *) _malloc_internal (sizeof *x); | |
3109 | if (x == NULL) | |
3110 | abort (); | |
3111 | #else | |
34400008 | 3112 | x = (struct mem_node *) xmalloc (sizeof *x); |
877935b1 | 3113 | #endif |
34400008 GM |
3114 | x->start = start; |
3115 | x->end = end; | |
3116 | x->type = type; | |
3117 | x->parent = parent; | |
3118 | x->left = x->right = MEM_NIL; | |
3119 | x->color = MEM_RED; | |
3120 | ||
3121 | /* Insert it as child of PARENT or install it as root. */ | |
3122 | if (parent) | |
3123 | { | |
3124 | if (start < parent->start) | |
3125 | parent->left = x; | |
3126 | else | |
3127 | parent->right = x; | |
3128 | } | |
177c0ea7 | 3129 | else |
34400008 GM |
3130 | mem_root = x; |
3131 | ||
3132 | /* Re-establish red-black tree properties. */ | |
3133 | mem_insert_fixup (x); | |
877935b1 | 3134 | |
34400008 GM |
3135 | return x; |
3136 | } | |
3137 | ||
3138 | ||
3139 | /* Re-establish the red-black properties of the tree, and thereby | |
3140 | balance the tree, after node X has been inserted; X is always red. */ | |
3141 | ||
3142 | static void | |
3143 | mem_insert_fixup (x) | |
3144 | struct mem_node *x; | |
3145 | { | |
3146 | while (x != mem_root && x->parent->color == MEM_RED) | |
3147 | { | |
3148 | /* X is red and its parent is red. This is a violation of | |
3149 | red-black tree property #3. */ | |
177c0ea7 | 3150 | |
34400008 GM |
3151 | if (x->parent == x->parent->parent->left) |
3152 | { | |
3153 | /* We're on the left side of our grandparent, and Y is our | |
3154 | "uncle". */ | |
3155 | struct mem_node *y = x->parent->parent->right; | |
177c0ea7 | 3156 | |
34400008 GM |
3157 | if (y->color == MEM_RED) |
3158 | { | |
3159 | /* Uncle and parent are red but should be black because | |
3160 | X is red. Change the colors accordingly and proceed | |
3161 | with the grandparent. */ | |
3162 | x->parent->color = MEM_BLACK; | |
3163 | y->color = MEM_BLACK; | |
3164 | x->parent->parent->color = MEM_RED; | |
3165 | x = x->parent->parent; | |
3166 | } | |
3167 | else | |
3168 | { | |
3169 | /* Parent and uncle have different colors; parent is | |
3170 | red, uncle is black. */ | |
3171 | if (x == x->parent->right) | |
3172 | { | |
3173 | x = x->parent; | |
3174 | mem_rotate_left (x); | |
3175 | } | |
3176 | ||
3177 | x->parent->color = MEM_BLACK; | |
3178 | x->parent->parent->color = MEM_RED; | |
3179 | mem_rotate_right (x->parent->parent); | |
3180 | } | |
3181 | } | |
3182 | else | |
3183 | { | |
3184 | /* This is the symmetrical case of above. */ | |
3185 | struct mem_node *y = x->parent->parent->left; | |
177c0ea7 | 3186 | |
34400008 GM |
3187 | if (y->color == MEM_RED) |
3188 | { | |
3189 | x->parent->color = MEM_BLACK; | |
3190 | y->color = MEM_BLACK; | |
3191 | x->parent->parent->color = MEM_RED; | |
3192 | x = x->parent->parent; | |
3193 | } | |
3194 | else | |
3195 | { | |
3196 | if (x == x->parent->left) | |
3197 | { | |
3198 | x = x->parent; | |
3199 | mem_rotate_right (x); | |
3200 | } | |
177c0ea7 | 3201 | |
34400008 GM |
3202 | x->parent->color = MEM_BLACK; |
3203 | x->parent->parent->color = MEM_RED; | |
3204 | mem_rotate_left (x->parent->parent); | |
3205 | } | |
3206 | } | |
3207 | } | |
3208 | ||
3209 | /* The root may have been changed to red due to the algorithm. Set | |
3210 | it to black so that property #5 is satisfied. */ | |
3211 | mem_root->color = MEM_BLACK; | |
3212 | } | |
3213 | ||
3214 | ||
177c0ea7 JB |
3215 | /* (x) (y) |
3216 | / \ / \ | |
34400008 GM |
3217 | a (y) ===> (x) c |
3218 | / \ / \ | |
3219 | b c a b */ | |
3220 | ||
3221 | static void | |
3222 | mem_rotate_left (x) | |
3223 | struct mem_node *x; | |
3224 | { | |
3225 | struct mem_node *y; | |
3226 | ||
3227 | /* Turn y's left sub-tree into x's right sub-tree. */ | |
3228 | y = x->right; | |
3229 | x->right = y->left; | |
3230 | if (y->left != MEM_NIL) | |
3231 | y->left->parent = x; | |
3232 | ||
3233 | /* Y's parent was x's parent. */ | |
3234 | if (y != MEM_NIL) | |
3235 | y->parent = x->parent; | |
3236 | ||
3237 | /* Get the parent to point to y instead of x. */ | |
3238 | if (x->parent) | |
3239 | { | |
3240 | if (x == x->parent->left) | |
3241 | x->parent->left = y; | |
3242 | else | |
3243 | x->parent->right = y; | |
3244 | } | |
3245 | else | |
3246 | mem_root = y; | |
3247 | ||
3248 | /* Put x on y's left. */ | |
3249 | y->left = x; | |
3250 | if (x != MEM_NIL) | |
3251 | x->parent = y; | |
3252 | } | |
3253 | ||
3254 | ||
177c0ea7 JB |
3255 | /* (x) (Y) |
3256 | / \ / \ | |
3257 | (y) c ===> a (x) | |
3258 | / \ / \ | |
34400008 GM |
3259 | a b b c */ |
3260 | ||
3261 | static void | |
3262 | mem_rotate_right (x) | |
3263 | struct mem_node *x; | |
3264 | { | |
3265 | struct mem_node *y = x->left; | |
3266 | ||
3267 | x->left = y->right; | |
3268 | if (y->right != MEM_NIL) | |
3269 | y->right->parent = x; | |
177c0ea7 | 3270 | |
34400008 GM |
3271 | if (y != MEM_NIL) |
3272 | y->parent = x->parent; | |
3273 | if (x->parent) | |
3274 | { | |
3275 | if (x == x->parent->right) | |
3276 | x->parent->right = y; | |
3277 | else | |
3278 | x->parent->left = y; | |
3279 | } | |
3280 | else | |
3281 | mem_root = y; | |
177c0ea7 | 3282 | |
34400008 GM |
3283 | y->right = x; |
3284 | if (x != MEM_NIL) | |
3285 | x->parent = y; | |
3286 | } | |
3287 | ||
3288 | ||
3289 | /* Delete node Z from the tree. If Z is null or MEM_NIL, do nothing. */ | |
3290 | ||
3291 | static void | |
3292 | mem_delete (z) | |
3293 | struct mem_node *z; | |
3294 | { | |
3295 | struct mem_node *x, *y; | |
3296 | ||
3297 | if (!z || z == MEM_NIL) | |
3298 | return; | |
3299 | ||
3300 | if (z->left == MEM_NIL || z->right == MEM_NIL) | |
3301 | y = z; | |
3302 | else | |
3303 | { | |
3304 | y = z->right; | |
3305 | while (y->left != MEM_NIL) | |
3306 | y = y->left; | |
3307 | } | |
3308 | ||
3309 | if (y->left != MEM_NIL) | |
3310 | x = y->left; | |
3311 | else | |
3312 | x = y->right; | |
3313 | ||
3314 | x->parent = y->parent; | |
3315 | if (y->parent) | |
3316 | { | |
3317 | if (y == y->parent->left) | |
3318 | y->parent->left = x; | |
3319 | else | |
3320 | y->parent->right = x; | |
3321 | } | |
3322 | else | |
3323 | mem_root = x; | |
3324 | ||
3325 | if (y != z) | |
3326 | { | |
3327 | z->start = y->start; | |
3328 | z->end = y->end; | |
3329 | z->type = y->type; | |
3330 | } | |
177c0ea7 | 3331 | |
34400008 GM |
3332 | if (y->color == MEM_BLACK) |
3333 | mem_delete_fixup (x); | |
877935b1 GM |
3334 | |
3335 | #ifdef GC_MALLOC_CHECK | |
3336 | _free_internal (y); | |
3337 | #else | |
34400008 | 3338 | xfree (y); |
877935b1 | 3339 | #endif |
34400008 GM |
3340 | } |
3341 | ||
3342 | ||
3343 | /* Re-establish the red-black properties of the tree, after a | |
3344 | deletion. */ | |
3345 | ||
3346 | static void | |
3347 | mem_delete_fixup (x) | |
3348 | struct mem_node *x; | |
3349 | { | |
3350 | while (x != mem_root && x->color == MEM_BLACK) | |
3351 | { | |
3352 | if (x == x->parent->left) | |
3353 | { | |
3354 | struct mem_node *w = x->parent->right; | |
177c0ea7 | 3355 | |
34400008 GM |
3356 | if (w->color == MEM_RED) |
3357 | { | |
3358 | w->color = MEM_BLACK; | |
3359 | x->parent->color = MEM_RED; | |
3360 | mem_rotate_left (x->parent); | |
3361 | w = x->parent->right; | |
3362 | } | |
177c0ea7 | 3363 | |
34400008 GM |
3364 | if (w->left->color == MEM_BLACK && w->right->color == MEM_BLACK) |
3365 | { | |
3366 | w->color = MEM_RED; | |
3367 | x = x->parent; | |
3368 | } | |
3369 | else | |
3370 | { | |
3371 | if (w->right->color == MEM_BLACK) | |
3372 | { | |
3373 | w->left->color = MEM_BLACK; | |
3374 | w->color = MEM_RED; | |
3375 | mem_rotate_right (w); | |
3376 | w = x->parent->right; | |
3377 | } | |
3378 | w->color = x->parent->color; | |
3379 | x->parent->color = MEM_BLACK; | |
3380 | w->right->color = MEM_BLACK; | |
3381 | mem_rotate_left (x->parent); | |
3382 | x = mem_root; | |
3383 | } | |
3384 | } | |
3385 | else | |
3386 | { | |
3387 | struct mem_node *w = x->parent->left; | |
177c0ea7 | 3388 | |
34400008 GM |
3389 | if (w->color == MEM_RED) |
3390 | { | |
3391 | w->color = MEM_BLACK; | |
3392 | x->parent->color = MEM_RED; | |
3393 | mem_rotate_right (x->parent); | |
3394 | w = x->parent->left; | |
3395 | } | |
177c0ea7 | 3396 | |
34400008 GM |
3397 | if (w->right->color == MEM_BLACK && w->left->color == MEM_BLACK) |
3398 | { | |
3399 | w->color = MEM_RED; | |
3400 | x = x->parent; | |
3401 | } | |
3402 | else | |
3403 | { | |
3404 | if (w->left->color == MEM_BLACK) | |
3405 | { | |
3406 | w->right->color = MEM_BLACK; | |
3407 | w->color = MEM_RED; | |
3408 | mem_rotate_left (w); | |
3409 | w = x->parent->left; | |
3410 | } | |
177c0ea7 | 3411 | |
34400008 GM |
3412 | w->color = x->parent->color; |
3413 | x->parent->color = MEM_BLACK; | |
3414 | w->left->color = MEM_BLACK; | |
3415 | mem_rotate_right (x->parent); | |
3416 | x = mem_root; | |
3417 | } | |
3418 | } | |
3419 | } | |
177c0ea7 | 3420 | |
34400008 GM |
3421 | x->color = MEM_BLACK; |
3422 | } | |
3423 | ||
3424 | ||
3425 | /* Value is non-zero if P is a pointer to a live Lisp string on | |
3426 | the heap. M is a pointer to the mem_block for P. */ | |
3427 | ||
3428 | static INLINE int | |
3429 | live_string_p (m, p) | |
3430 | struct mem_node *m; | |
3431 | void *p; | |
3432 | { | |
3433 | if (m->type == MEM_TYPE_STRING) | |
3434 | { | |
3435 | struct string_block *b = (struct string_block *) m->start; | |
3436 | int offset = (char *) p - (char *) &b->strings[0]; | |
3437 | ||
3438 | /* P must point to the start of a Lisp_String structure, and it | |
3439 | must not be on the free-list. */ | |
176bc847 GM |
3440 | return (offset >= 0 |
3441 | && offset % sizeof b->strings[0] == 0 | |
d05b383a | 3442 | && offset < (STRING_BLOCK_SIZE * sizeof b->strings[0]) |
34400008 GM |
3443 | && ((struct Lisp_String *) p)->data != NULL); |
3444 | } | |
3445 | else | |
3446 | return 0; | |
3447 | } | |
3448 | ||
3449 | ||
3450 | /* Value is non-zero if P is a pointer to a live Lisp cons on | |
3451 | the heap. M is a pointer to the mem_block for P. */ | |
3452 | ||
3453 | static INLINE int | |
3454 | live_cons_p (m, p) | |
3455 | struct mem_node *m; | |
3456 | void *p; | |
3457 | { | |
3458 | if (m->type == MEM_TYPE_CONS) | |
3459 | { | |
3460 | struct cons_block *b = (struct cons_block *) m->start; | |
3461 | int offset = (char *) p - (char *) &b->conses[0]; | |
3462 | ||
3463 | /* P must point to the start of a Lisp_Cons, not be | |
3464 | one of the unused cells in the current cons block, | |
3465 | and not be on the free-list. */ | |
176bc847 GM |
3466 | return (offset >= 0 |
3467 | && offset % sizeof b->conses[0] == 0 | |
d05b383a | 3468 | && offset < (CONS_BLOCK_SIZE * sizeof b->conses[0]) |
34400008 GM |
3469 | && (b != cons_block |
3470 | || offset / sizeof b->conses[0] < cons_block_index) | |
3471 | && !EQ (((struct Lisp_Cons *) p)->car, Vdead)); | |
3472 | } | |
3473 | else | |
3474 | return 0; | |
3475 | } | |
3476 | ||
3477 | ||
3478 | /* Value is non-zero if P is a pointer to a live Lisp symbol on | |
3479 | the heap. M is a pointer to the mem_block for P. */ | |
3480 | ||
3481 | static INLINE int | |
3482 | live_symbol_p (m, p) | |
3483 | struct mem_node *m; | |
3484 | void *p; | |
3485 | { | |
3486 | if (m->type == MEM_TYPE_SYMBOL) | |
3487 | { | |
3488 | struct symbol_block *b = (struct symbol_block *) m->start; | |
3489 | int offset = (char *) p - (char *) &b->symbols[0]; | |
177c0ea7 | 3490 | |
34400008 GM |
3491 | /* P must point to the start of a Lisp_Symbol, not be |
3492 | one of the unused cells in the current symbol block, | |
3493 | and not be on the free-list. */ | |
176bc847 GM |
3494 | return (offset >= 0 |
3495 | && offset % sizeof b->symbols[0] == 0 | |
d05b383a | 3496 | && offset < (SYMBOL_BLOCK_SIZE * sizeof b->symbols[0]) |
34400008 GM |
3497 | && (b != symbol_block |
3498 | || offset / sizeof b->symbols[0] < symbol_block_index) | |
3499 | && !EQ (((struct Lisp_Symbol *) p)->function, Vdead)); | |
3500 | } | |
3501 | else | |
3502 | return 0; | |
3503 | } | |
3504 | ||
3505 | ||
3506 | /* Value is non-zero if P is a pointer to a live Lisp float on | |
3507 | the heap. M is a pointer to the mem_block for P. */ | |
3508 | ||
3509 | static INLINE int | |
3510 | live_float_p (m, p) | |
3511 | struct mem_node *m; | |
3512 | void *p; | |
3513 | { | |
3514 | if (m->type == MEM_TYPE_FLOAT) | |
3515 | { | |
3516 | struct float_block *b = (struct float_block *) m->start; | |
3517 | int offset = (char *) p - (char *) &b->floats[0]; | |
177c0ea7 | 3518 | |
ab6780cd SM |
3519 | /* P must point to the start of a Lisp_Float and not be |
3520 | one of the unused cells in the current float block. */ | |
176bc847 GM |
3521 | return (offset >= 0 |
3522 | && offset % sizeof b->floats[0] == 0 | |
d05b383a | 3523 | && offset < (FLOAT_BLOCK_SIZE * sizeof b->floats[0]) |
34400008 | 3524 | && (b != float_block |
ab6780cd | 3525 | || offset / sizeof b->floats[0] < float_block_index)); |
34400008 GM |
3526 | } |
3527 | else | |
3528 | return 0; | |
3529 | } | |
3530 | ||
3531 | ||
3532 | /* Value is non-zero if P is a pointer to a live Lisp Misc on | |
3533 | the heap. M is a pointer to the mem_block for P. */ | |
3534 | ||
3535 | static INLINE int | |
3536 | live_misc_p (m, p) | |
3537 | struct mem_node *m; | |
3538 | void *p; | |
3539 | { | |
3540 | if (m->type == MEM_TYPE_MISC) | |
3541 | { | |
3542 | struct marker_block *b = (struct marker_block *) m->start; | |
3543 | int offset = (char *) p - (char *) &b->markers[0]; | |
177c0ea7 | 3544 | |
34400008 GM |
3545 | /* P must point to the start of a Lisp_Misc, not be |
3546 | one of the unused cells in the current misc block, | |
3547 | and not be on the free-list. */ | |
176bc847 GM |
3548 | return (offset >= 0 |
3549 | && offset % sizeof b->markers[0] == 0 | |
d05b383a | 3550 | && offset < (MARKER_BLOCK_SIZE * sizeof b->markers[0]) |
34400008 GM |
3551 | && (b != marker_block |
3552 | || offset / sizeof b->markers[0] < marker_block_index) | |
3553 | && ((union Lisp_Misc *) p)->u_marker.type != Lisp_Misc_Free); | |
3554 | } | |
3555 | else | |
3556 | return 0; | |
3557 | } | |
3558 | ||
3559 | ||
3560 | /* Value is non-zero if P is a pointer to a live vector-like object. | |
3561 | M is a pointer to the mem_block for P. */ | |
3562 | ||
3563 | static INLINE int | |
3564 | live_vector_p (m, p) | |
3565 | struct mem_node *m; | |
3566 | void *p; | |
3567 | { | |
ece93c02 GM |
3568 | return (p == m->start |
3569 | && m->type >= MEM_TYPE_VECTOR | |
3570 | && m->type <= MEM_TYPE_WINDOW); | |
34400008 GM |
3571 | } |
3572 | ||
3573 | ||
2336fe58 | 3574 | /* Value is non-zero if P is a pointer to a live buffer. M is a |
34400008 GM |
3575 | pointer to the mem_block for P. */ |
3576 | ||
3577 | static INLINE int | |
3578 | live_buffer_p (m, p) | |
3579 | struct mem_node *m; | |
3580 | void *p; | |
3581 | { | |
3582 | /* P must point to the start of the block, and the buffer | |
3583 | must not have been killed. */ | |
3584 | return (m->type == MEM_TYPE_BUFFER | |
3585 | && p == m->start | |
3586 | && !NILP (((struct buffer *) p)->name)); | |
3587 | } | |
3588 | ||
13c844fb GM |
3589 | #endif /* GC_MARK_STACK || defined GC_MALLOC_CHECK */ |
3590 | ||
3591 | #if GC_MARK_STACK | |
3592 | ||
34400008 GM |
3593 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
3594 | ||
3595 | /* Array of objects that are kept alive because the C stack contains | |
3596 | a pattern that looks like a reference to them . */ | |
3597 | ||
3598 | #define MAX_ZOMBIES 10 | |
3599 | static Lisp_Object zombies[MAX_ZOMBIES]; | |
3600 | ||
3601 | /* Number of zombie objects. */ | |
3602 | ||
3603 | static int nzombies; | |
3604 | ||
3605 | /* Number of garbage collections. */ | |
3606 | ||
3607 | static int ngcs; | |
3608 | ||
3609 | /* Average percentage of zombies per collection. */ | |
3610 | ||
3611 | static double avg_zombies; | |
3612 | ||
3613 | /* Max. number of live and zombie objects. */ | |
3614 | ||
3615 | static int max_live, max_zombies; | |
3616 | ||
3617 | /* Average number of live objects per GC. */ | |
3618 | ||
3619 | static double avg_live; | |
3620 | ||
3621 | DEFUN ("gc-status", Fgc_status, Sgc_status, 0, 0, "", | |
7ee72033 MB |
3622 | doc: /* Show information about live and zombie objects. */) |
3623 | () | |
34400008 | 3624 | { |
83fc9c63 DL |
3625 | Lisp_Object args[8], zombie_list = Qnil; |
3626 | int i; | |
3627 | for (i = 0; i < nzombies; i++) | |
3628 | zombie_list = Fcons (zombies[i], zombie_list); | |
3629 | args[0] = build_string ("%d GCs, avg live/zombies = %.2f/%.2f (%f%%), max %d/%d\nzombies: %S"); | |
34400008 GM |
3630 | args[1] = make_number (ngcs); |
3631 | args[2] = make_float (avg_live); | |
3632 | args[3] = make_float (avg_zombies); | |
3633 | args[4] = make_float (avg_zombies / avg_live / 100); | |
3634 | args[5] = make_number (max_live); | |
3635 | args[6] = make_number (max_zombies); | |
83fc9c63 DL |
3636 | args[7] = zombie_list; |
3637 | return Fmessage (8, args); | |
34400008 GM |
3638 | } |
3639 | ||
3640 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
3641 | ||
3642 | ||
182ff242 GM |
3643 | /* Mark OBJ if we can prove it's a Lisp_Object. */ |
3644 | ||
3645 | static INLINE void | |
3646 | mark_maybe_object (obj) | |
3647 | Lisp_Object obj; | |
3648 | { | |
3649 | void *po = (void *) XPNTR (obj); | |
3650 | struct mem_node *m = mem_find (po); | |
177c0ea7 | 3651 | |
182ff242 GM |
3652 | if (m != MEM_NIL) |
3653 | { | |
3654 | int mark_p = 0; | |
3655 | ||
3656 | switch (XGCTYPE (obj)) | |
3657 | { | |
3658 | case Lisp_String: | |
3659 | mark_p = (live_string_p (m, po) | |
3660 | && !STRING_MARKED_P ((struct Lisp_String *) po)); | |
3661 | break; | |
3662 | ||
3663 | case Lisp_Cons: | |
08b7c2cb | 3664 | mark_p = (live_cons_p (m, po) && !CONS_MARKED_P (XCONS (obj))); |
182ff242 GM |
3665 | break; |
3666 | ||
3667 | case Lisp_Symbol: | |
2336fe58 | 3668 | mark_p = (live_symbol_p (m, po) && !XSYMBOL (obj)->gcmarkbit); |
182ff242 GM |
3669 | break; |
3670 | ||
3671 | case Lisp_Float: | |
ab6780cd | 3672 | mark_p = (live_float_p (m, po) && !FLOAT_MARKED_P (XFLOAT (obj))); |
182ff242 GM |
3673 | break; |
3674 | ||
3675 | case Lisp_Vectorlike: | |
3676 | /* Note: can't check GC_BUFFERP before we know it's a | |
3677 | buffer because checking that dereferences the pointer | |
3678 | PO which might point anywhere. */ | |
3679 | if (live_vector_p (m, po)) | |
3ef06d12 | 3680 | mark_p = !GC_SUBRP (obj) && !VECTOR_MARKED_P (XVECTOR (obj)); |
182ff242 | 3681 | else if (live_buffer_p (m, po)) |
3ef06d12 | 3682 | mark_p = GC_BUFFERP (obj) && !VECTOR_MARKED_P (XBUFFER (obj)); |
182ff242 GM |
3683 | break; |
3684 | ||
3685 | case Lisp_Misc: | |
2336fe58 | 3686 | mark_p = (live_misc_p (m, po) && !XMARKER (obj)->gcmarkbit); |
182ff242 | 3687 | break; |
6bbd7a29 GM |
3688 | |
3689 | case Lisp_Int: | |
31d929e5 | 3690 | case Lisp_Type_Limit: |
6bbd7a29 | 3691 | break; |
182ff242 GM |
3692 | } |
3693 | ||
3694 | if (mark_p) | |
3695 | { | |
3696 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
3697 | if (nzombies < MAX_ZOMBIES) | |
83fc9c63 | 3698 | zombies[nzombies] = obj; |
182ff242 GM |
3699 | ++nzombies; |
3700 | #endif | |
49723c04 | 3701 | mark_object (obj); |
182ff242 GM |
3702 | } |
3703 | } | |
3704 | } | |
ece93c02 GM |
3705 | |
3706 | ||
3707 | /* If P points to Lisp data, mark that as live if it isn't already | |
3708 | marked. */ | |
3709 | ||
3710 | static INLINE void | |
3711 | mark_maybe_pointer (p) | |
3712 | void *p; | |
3713 | { | |
3714 | struct mem_node *m; | |
3715 | ||
3716 | /* Quickly rule out some values which can't point to Lisp data. We | |
3717 | assume that Lisp data is aligned on even addresses. */ | |
3718 | if ((EMACS_INT) p & 1) | |
3719 | return; | |
177c0ea7 | 3720 | |
ece93c02 GM |
3721 | m = mem_find (p); |
3722 | if (m != MEM_NIL) | |
3723 | { | |
3724 | Lisp_Object obj = Qnil; | |
177c0ea7 | 3725 | |
ece93c02 GM |
3726 | switch (m->type) |
3727 | { | |
3728 | case MEM_TYPE_NON_LISP: | |
2fe50224 | 3729 | /* Nothing to do; not a pointer to Lisp memory. */ |
ece93c02 | 3730 | break; |
177c0ea7 | 3731 | |
ece93c02 | 3732 | case MEM_TYPE_BUFFER: |
3ef06d12 | 3733 | if (live_buffer_p (m, p) && !VECTOR_MARKED_P((struct buffer *)p)) |
ece93c02 GM |
3734 | XSETVECTOR (obj, p); |
3735 | break; | |
177c0ea7 | 3736 | |
ece93c02 | 3737 | case MEM_TYPE_CONS: |
08b7c2cb | 3738 | if (live_cons_p (m, p) && !CONS_MARKED_P ((struct Lisp_Cons *) p)) |
ece93c02 GM |
3739 | XSETCONS (obj, p); |
3740 | break; | |
177c0ea7 | 3741 | |
ece93c02 GM |
3742 | case MEM_TYPE_STRING: |
3743 | if (live_string_p (m, p) | |
3744 | && !STRING_MARKED_P ((struct Lisp_String *) p)) | |
3745 | XSETSTRING (obj, p); | |
3746 | break; | |
3747 | ||
3748 | case MEM_TYPE_MISC: | |
2336fe58 SM |
3749 | if (live_misc_p (m, p) && !((struct Lisp_Free *) p)->gcmarkbit) |
3750 | XSETMISC (obj, p); | |
ece93c02 | 3751 | break; |
177c0ea7 | 3752 | |
ece93c02 | 3753 | case MEM_TYPE_SYMBOL: |
2336fe58 | 3754 | if (live_symbol_p (m, p) && !((struct Lisp_Symbol *) p)->gcmarkbit) |
ece93c02 GM |
3755 | XSETSYMBOL (obj, p); |
3756 | break; | |
177c0ea7 | 3757 | |
ece93c02 | 3758 | case MEM_TYPE_FLOAT: |
ab6780cd | 3759 | if (live_float_p (m, p) && !FLOAT_MARKED_P (p)) |
ece93c02 GM |
3760 | XSETFLOAT (obj, p); |
3761 | break; | |
177c0ea7 | 3762 | |
ece93c02 GM |
3763 | case MEM_TYPE_VECTOR: |
3764 | case MEM_TYPE_PROCESS: | |
3765 | case MEM_TYPE_HASH_TABLE: | |
3766 | case MEM_TYPE_FRAME: | |
3767 | case MEM_TYPE_WINDOW: | |
3768 | if (live_vector_p (m, p)) | |
3769 | { | |
3770 | Lisp_Object tem; | |
3771 | XSETVECTOR (tem, p); | |
3ef06d12 | 3772 | if (!GC_SUBRP (tem) && !VECTOR_MARKED_P (XVECTOR (tem))) |
ece93c02 GM |
3773 | obj = tem; |
3774 | } | |
3775 | break; | |
3776 | ||
3777 | default: | |
3778 | abort (); | |
3779 | } | |
3780 | ||
3781 | if (!GC_NILP (obj)) | |
49723c04 | 3782 | mark_object (obj); |
ece93c02 GM |
3783 | } |
3784 | } | |
3785 | ||
3786 | ||
3787 | /* Mark Lisp objects referenced from the address range START..END. */ | |
34400008 | 3788 | |
177c0ea7 | 3789 | static void |
34400008 GM |
3790 | mark_memory (start, end) |
3791 | void *start, *end; | |
3792 | { | |
3793 | Lisp_Object *p; | |
ece93c02 | 3794 | void **pp; |
34400008 GM |
3795 | |
3796 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
3797 | nzombies = 0; | |
3798 | #endif | |
3799 | ||
3800 | /* Make START the pointer to the start of the memory region, | |
3801 | if it isn't already. */ | |
3802 | if (end < start) | |
3803 | { | |
3804 | void *tem = start; | |
3805 | start = end; | |
3806 | end = tem; | |
3807 | } | |
ece93c02 GM |
3808 | |
3809 | /* Mark Lisp_Objects. */ | |
34400008 | 3810 | for (p = (Lisp_Object *) start; (void *) p < end; ++p) |
182ff242 | 3811 | mark_maybe_object (*p); |
ece93c02 GM |
3812 | |
3813 | /* Mark Lisp data pointed to. This is necessary because, in some | |
3814 | situations, the C compiler optimizes Lisp objects away, so that | |
3815 | only a pointer to them remains. Example: | |
3816 | ||
3817 | DEFUN ("testme", Ftestme, Stestme, 0, 0, 0, "") | |
7ee72033 | 3818 | () |
ece93c02 GM |
3819 | { |
3820 | Lisp_Object obj = build_string ("test"); | |
3821 | struct Lisp_String *s = XSTRING (obj); | |
3822 | Fgarbage_collect (); | |
3823 | fprintf (stderr, "test `%s'\n", s->data); | |
3824 | return Qnil; | |
3825 | } | |
3826 | ||
3827 | Here, `obj' isn't really used, and the compiler optimizes it | |
3828 | away. The only reference to the life string is through the | |
3829 | pointer `s'. */ | |
177c0ea7 | 3830 | |
ece93c02 GM |
3831 | for (pp = (void **) start; (void *) pp < end; ++pp) |
3832 | mark_maybe_pointer (*pp); | |
182ff242 GM |
3833 | } |
3834 | ||
30f637f8 DL |
3835 | /* setjmp will work with GCC unless NON_SAVING_SETJMP is defined in |
3836 | the GCC system configuration. In gcc 3.2, the only systems for | |
3837 | which this is so are i386-sco5 non-ELF, i386-sysv3 (maybe included | |
3838 | by others?) and ns32k-pc532-min. */ | |
182ff242 GM |
3839 | |
3840 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
3841 | ||
3842 | static int setjmp_tested_p, longjmps_done; | |
3843 | ||
3844 | #define SETJMP_WILL_LIKELY_WORK "\ | |
3845 | \n\ | |
3846 | Emacs garbage collector has been changed to use conservative stack\n\ | |
3847 | marking. Emacs has determined that the method it uses to do the\n\ | |
3848 | marking will likely work on your system, but this isn't sure.\n\ | |
3849 | \n\ | |
3850 | If you are a system-programmer, or can get the help of a local wizard\n\ | |
3851 | who is, please take a look at the function mark_stack in alloc.c, and\n\ | |
3852 | verify that the methods used are appropriate for your system.\n\ | |
3853 | \n\ | |
d191623b | 3854 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
3855 | " |
3856 | ||
3857 | #define SETJMP_WILL_NOT_WORK "\ | |
3858 | \n\ | |
3859 | Emacs garbage collector has been changed to use conservative stack\n\ | |
3860 | marking. Emacs has determined that the default method it uses to do the\n\ | |
3861 | marking will not work on your system. We will need a system-dependent\n\ | |
3862 | solution for your system.\n\ | |
3863 | \n\ | |
3864 | Please take a look at the function mark_stack in alloc.c, and\n\ | |
3865 | try to find a way to make it work on your system.\n\ | |
30f637f8 DL |
3866 | \n\ |
3867 | Note that you may get false negatives, depending on the compiler.\n\ | |
3868 | In particular, you need to use -O with GCC for this test.\n\ | |
3869 | \n\ | |
d191623b | 3870 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
3871 | " |
3872 | ||
3873 | ||
3874 | /* Perform a quick check if it looks like setjmp saves registers in a | |
3875 | jmp_buf. Print a message to stderr saying so. When this test | |
3876 | succeeds, this is _not_ a proof that setjmp is sufficient for | |
3877 | conservative stack marking. Only the sources or a disassembly | |
3878 | can prove that. */ | |
3879 | ||
3880 | static void | |
3881 | test_setjmp () | |
3882 | { | |
3883 | char buf[10]; | |
3884 | register int x; | |
3885 | jmp_buf jbuf; | |
3886 | int result = 0; | |
3887 | ||
3888 | /* Arrange for X to be put in a register. */ | |
3889 | sprintf (buf, "1"); | |
3890 | x = strlen (buf); | |
3891 | x = 2 * x - 1; | |
3892 | ||
3893 | setjmp (jbuf); | |
3894 | if (longjmps_done == 1) | |
34400008 | 3895 | { |
182ff242 | 3896 | /* Came here after the longjmp at the end of the function. |
34400008 | 3897 | |
182ff242 GM |
3898 | If x == 1, the longjmp has restored the register to its |
3899 | value before the setjmp, and we can hope that setjmp | |
3900 | saves all such registers in the jmp_buf, although that | |
3901 | isn't sure. | |
34400008 | 3902 | |
182ff242 GM |
3903 | For other values of X, either something really strange is |
3904 | taking place, or the setjmp just didn't save the register. */ | |
3905 | ||
3906 | if (x == 1) | |
3907 | fprintf (stderr, SETJMP_WILL_LIKELY_WORK); | |
3908 | else | |
3909 | { | |
3910 | fprintf (stderr, SETJMP_WILL_NOT_WORK); | |
3911 | exit (1); | |
34400008 GM |
3912 | } |
3913 | } | |
182ff242 GM |
3914 | |
3915 | ++longjmps_done; | |
3916 | x = 2; | |
3917 | if (longjmps_done == 1) | |
3918 | longjmp (jbuf, 1); | |
34400008 GM |
3919 | } |
3920 | ||
182ff242 GM |
3921 | #endif /* not GC_SAVE_REGISTERS_ON_STACK && not GC_SETJMP_WORKS */ |
3922 | ||
34400008 GM |
3923 | |
3924 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
3925 | ||
3926 | /* Abort if anything GCPRO'd doesn't survive the GC. */ | |
3927 | ||
3928 | static void | |
3929 | check_gcpros () | |
3930 | { | |
3931 | struct gcpro *p; | |
3932 | int i; | |
3933 | ||
3934 | for (p = gcprolist; p; p = p->next) | |
3935 | for (i = 0; i < p->nvars; ++i) | |
3936 | if (!survives_gc_p (p->var[i])) | |
92cc28b2 SM |
3937 | /* FIXME: It's not necessarily a bug. It might just be that the |
3938 | GCPRO is unnecessary or should release the object sooner. */ | |
34400008 GM |
3939 | abort (); |
3940 | } | |
3941 | ||
3942 | #elif GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
3943 | ||
3944 | static void | |
3945 | dump_zombies () | |
3946 | { | |
3947 | int i; | |
3948 | ||
3949 | fprintf (stderr, "\nZombies kept alive = %d:\n", nzombies); | |
3950 | for (i = 0; i < min (MAX_ZOMBIES, nzombies); ++i) | |
3951 | { | |
3952 | fprintf (stderr, " %d = ", i); | |
3953 | debug_print (zombies[i]); | |
3954 | } | |
3955 | } | |
3956 | ||
3957 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
3958 | ||
3959 | ||
182ff242 GM |
3960 | /* Mark live Lisp objects on the C stack. |
3961 | ||
3962 | There are several system-dependent problems to consider when | |
3963 | porting this to new architectures: | |
3964 | ||
3965 | Processor Registers | |
3966 | ||
3967 | We have to mark Lisp objects in CPU registers that can hold local | |
3968 | variables or are used to pass parameters. | |
3969 | ||
3970 | If GC_SAVE_REGISTERS_ON_STACK is defined, it should expand to | |
3971 | something that either saves relevant registers on the stack, or | |
3972 | calls mark_maybe_object passing it each register's contents. | |
3973 | ||
3974 | If GC_SAVE_REGISTERS_ON_STACK is not defined, the current | |
3975 | implementation assumes that calling setjmp saves registers we need | |
3976 | to see in a jmp_buf which itself lies on the stack. This doesn't | |
3977 | have to be true! It must be verified for each system, possibly | |
3978 | by taking a look at the source code of setjmp. | |
3979 | ||
3980 | Stack Layout | |
3981 | ||
3982 | Architectures differ in the way their processor stack is organized. | |
3983 | For example, the stack might look like this | |
3984 | ||
3985 | +----------------+ | |
3986 | | Lisp_Object | size = 4 | |
3987 | +----------------+ | |
3988 | | something else | size = 2 | |
3989 | +----------------+ | |
3990 | | Lisp_Object | size = 4 | |
3991 | +----------------+ | |
3992 | | ... | | |
3993 | ||
3994 | In such a case, not every Lisp_Object will be aligned equally. To | |
3995 | find all Lisp_Object on the stack it won't be sufficient to walk | |
3996 | the stack in steps of 4 bytes. Instead, two passes will be | |
3997 | necessary, one starting at the start of the stack, and a second | |
3998 | pass starting at the start of the stack + 2. Likewise, if the | |
3999 | minimal alignment of Lisp_Objects on the stack is 1, four passes | |
4000 | would be necessary, each one starting with one byte more offset | |
4001 | from the stack start. | |
4002 | ||
4003 | The current code assumes by default that Lisp_Objects are aligned | |
4004 | equally on the stack. */ | |
34400008 GM |
4005 | |
4006 | static void | |
4007 | mark_stack () | |
4008 | { | |
630909a5 | 4009 | int i; |
34400008 | 4010 | jmp_buf j; |
6bbd7a29 | 4011 | volatile int stack_grows_down_p = (char *) &j > (char *) stack_base; |
34400008 GM |
4012 | void *end; |
4013 | ||
4014 | /* This trick flushes the register windows so that all the state of | |
4015 | the process is contained in the stack. */ | |
ab6780cd | 4016 | /* Fixme: Code in the Boehm GC suggests flushing (with `flushrs') is |
422eec7e DL |
4017 | needed on ia64 too. See mach_dep.c, where it also says inline |
4018 | assembler doesn't work with relevant proprietary compilers. */ | |
34400008 GM |
4019 | #ifdef sparc |
4020 | asm ("ta 3"); | |
4021 | #endif | |
177c0ea7 | 4022 | |
34400008 GM |
4023 | /* Save registers that we need to see on the stack. We need to see |
4024 | registers used to hold register variables and registers used to | |
4025 | pass parameters. */ | |
4026 | #ifdef GC_SAVE_REGISTERS_ON_STACK | |
4027 | GC_SAVE_REGISTERS_ON_STACK (end); | |
182ff242 | 4028 | #else /* not GC_SAVE_REGISTERS_ON_STACK */ |
177c0ea7 | 4029 | |
182ff242 GM |
4030 | #ifndef GC_SETJMP_WORKS /* If it hasn't been checked yet that |
4031 | setjmp will definitely work, test it | |
4032 | and print a message with the result | |
4033 | of the test. */ | |
4034 | if (!setjmp_tested_p) | |
4035 | { | |
4036 | setjmp_tested_p = 1; | |
4037 | test_setjmp (); | |
4038 | } | |
4039 | #endif /* GC_SETJMP_WORKS */ | |
177c0ea7 | 4040 | |
34400008 GM |
4041 | setjmp (j); |
4042 | end = stack_grows_down_p ? (char *) &j + sizeof j : (char *) &j; | |
182ff242 | 4043 | #endif /* not GC_SAVE_REGISTERS_ON_STACK */ |
34400008 GM |
4044 | |
4045 | /* This assumes that the stack is a contiguous region in memory. If | |
182ff242 GM |
4046 | that's not the case, something has to be done here to iterate |
4047 | over the stack segments. */ | |
630909a5 | 4048 | #ifndef GC_LISP_OBJECT_ALIGNMENT |
422eec7e DL |
4049 | #ifdef __GNUC__ |
4050 | #define GC_LISP_OBJECT_ALIGNMENT __alignof__ (Lisp_Object) | |
4051 | #else | |
630909a5 | 4052 | #define GC_LISP_OBJECT_ALIGNMENT sizeof (Lisp_Object) |
422eec7e | 4053 | #endif |
182ff242 | 4054 | #endif |
24452cd5 | 4055 | for (i = 0; i < sizeof (Lisp_Object); i += GC_LISP_OBJECT_ALIGNMENT) |
630909a5 | 4056 | mark_memory ((char *) stack_base + i, end); |
34400008 GM |
4057 | |
4058 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
4059 | check_gcpros (); | |
4060 | #endif | |
4061 | } | |
4062 | ||
4063 | ||
4064 | #endif /* GC_MARK_STACK != 0 */ | |
4065 | ||
4066 | ||
4067 | \f | |
2e471eb5 GM |
4068 | /*********************************************************************** |
4069 | Pure Storage Management | |
4070 | ***********************************************************************/ | |
4071 | ||
1f0b3fd2 GM |
4072 | /* Allocate room for SIZE bytes from pure Lisp storage and return a |
4073 | pointer to it. TYPE is the Lisp type for which the memory is | |
4074 | allocated. TYPE < 0 means it's not used for a Lisp object. | |
4075 | ||
4076 | If store_pure_type_info is set and TYPE is >= 0, the type of | |
4077 | the allocated object is recorded in pure_types. */ | |
4078 | ||
4079 | static POINTER_TYPE * | |
4080 | pure_alloc (size, type) | |
4081 | size_t size; | |
4082 | int type; | |
4083 | { | |
1f0b3fd2 | 4084 | POINTER_TYPE *result; |
831b476c SM |
4085 | #ifdef USE_LSB_TAG |
4086 | size_t alignment = (1 << GCTYPEBITS); | |
4087 | #else | |
44117420 | 4088 | size_t alignment = sizeof (EMACS_INT); |
1f0b3fd2 GM |
4089 | |
4090 | /* Give Lisp_Floats an extra alignment. */ | |
4091 | if (type == Lisp_Float) | |
4092 | { | |
1f0b3fd2 GM |
4093 | #if defined __GNUC__ && __GNUC__ >= 2 |
4094 | alignment = __alignof (struct Lisp_Float); | |
4095 | #else | |
4096 | alignment = sizeof (struct Lisp_Float); | |
4097 | #endif | |
9e713715 | 4098 | } |
831b476c | 4099 | #endif |
1f0b3fd2 | 4100 | |
44117420 | 4101 | again: |
ab6780cd | 4102 | result = ALIGN (purebeg + pure_bytes_used, alignment); |
44117420 KS |
4103 | pure_bytes_used = ((char *)result - (char *)purebeg) + size; |
4104 | ||
4105 | if (pure_bytes_used <= pure_size) | |
4106 | return result; | |
4107 | ||
4108 | /* Don't allocate a large amount here, | |
4109 | because it might get mmap'd and then its address | |
4110 | might not be usable. */ | |
4111 | purebeg = (char *) xmalloc (10000); | |
4112 | pure_size = 10000; | |
4113 | pure_bytes_used_before_overflow += pure_bytes_used - size; | |
4114 | pure_bytes_used = 0; | |
4115 | goto again; | |
1f0b3fd2 GM |
4116 | } |
4117 | ||
4118 | ||
852f8cdc | 4119 | /* Print a warning if PURESIZE is too small. */ |
9e713715 GM |
4120 | |
4121 | void | |
4122 | check_pure_size () | |
4123 | { | |
4124 | if (pure_bytes_used_before_overflow) | |
a4d35afd SM |
4125 | message ("Pure Lisp storage overflow (approx. %d bytes needed)", |
4126 | (int) (pure_bytes_used + pure_bytes_used_before_overflow)); | |
9e713715 GM |
4127 | } |
4128 | ||
4129 | ||
2e471eb5 GM |
4130 | /* Return a string allocated in pure space. DATA is a buffer holding |
4131 | NCHARS characters, and NBYTES bytes of string data. MULTIBYTE | |
4132 | non-zero means make the result string multibyte. | |
1a4f1e2c | 4133 | |
2e471eb5 GM |
4134 | Must get an error if pure storage is full, since if it cannot hold |
4135 | a large string it may be able to hold conses that point to that | |
4136 | string; then the string is not protected from gc. */ | |
7146af97 JB |
4137 | |
4138 | Lisp_Object | |
2e471eb5 | 4139 | make_pure_string (data, nchars, nbytes, multibyte) |
7146af97 | 4140 | char *data; |
2e471eb5 | 4141 | int nchars, nbytes; |
c0696668 | 4142 | int multibyte; |
7146af97 | 4143 | { |
2e471eb5 GM |
4144 | Lisp_Object string; |
4145 | struct Lisp_String *s; | |
c0696668 | 4146 | |
1f0b3fd2 GM |
4147 | s = (struct Lisp_String *) pure_alloc (sizeof *s, Lisp_String); |
4148 | s->data = (unsigned char *) pure_alloc (nbytes + 1, -1); | |
2e471eb5 GM |
4149 | s->size = nchars; |
4150 | s->size_byte = multibyte ? nbytes : -1; | |
4151 | bcopy (data, s->data, nbytes); | |
4152 | s->data[nbytes] = '\0'; | |
4153 | s->intervals = NULL_INTERVAL; | |
2e471eb5 GM |
4154 | XSETSTRING (string, s); |
4155 | return string; | |
7146af97 JB |
4156 | } |
4157 | ||
2e471eb5 | 4158 | |
34400008 GM |
4159 | /* Return a cons allocated from pure space. Give it pure copies |
4160 | of CAR as car and CDR as cdr. */ | |
4161 | ||
7146af97 JB |
4162 | Lisp_Object |
4163 | pure_cons (car, cdr) | |
4164 | Lisp_Object car, cdr; | |
4165 | { | |
4166 | register Lisp_Object new; | |
1f0b3fd2 | 4167 | struct Lisp_Cons *p; |
7146af97 | 4168 | |
1f0b3fd2 GM |
4169 | p = (struct Lisp_Cons *) pure_alloc (sizeof *p, Lisp_Cons); |
4170 | XSETCONS (new, p); | |
f3fbd155 KR |
4171 | XSETCAR (new, Fpurecopy (car)); |
4172 | XSETCDR (new, Fpurecopy (cdr)); | |
7146af97 JB |
4173 | return new; |
4174 | } | |
4175 | ||
7146af97 | 4176 | |
34400008 GM |
4177 | /* Value is a float object with value NUM allocated from pure space. */ |
4178 | ||
7146af97 JB |
4179 | Lisp_Object |
4180 | make_pure_float (num) | |
4181 | double num; | |
4182 | { | |
4183 | register Lisp_Object new; | |
1f0b3fd2 | 4184 | struct Lisp_Float *p; |
7146af97 | 4185 | |
1f0b3fd2 GM |
4186 | p = (struct Lisp_Float *) pure_alloc (sizeof *p, Lisp_Float); |
4187 | XSETFLOAT (new, p); | |
70949dac | 4188 | XFLOAT_DATA (new) = num; |
7146af97 JB |
4189 | return new; |
4190 | } | |
4191 | ||
34400008 GM |
4192 | |
4193 | /* Return a vector with room for LEN Lisp_Objects allocated from | |
4194 | pure space. */ | |
4195 | ||
7146af97 JB |
4196 | Lisp_Object |
4197 | make_pure_vector (len) | |
42607681 | 4198 | EMACS_INT len; |
7146af97 | 4199 | { |
1f0b3fd2 GM |
4200 | Lisp_Object new; |
4201 | struct Lisp_Vector *p; | |
4202 | size_t size = sizeof *p + (len - 1) * sizeof (Lisp_Object); | |
7146af97 | 4203 | |
1f0b3fd2 GM |
4204 | p = (struct Lisp_Vector *) pure_alloc (size, Lisp_Vectorlike); |
4205 | XSETVECTOR (new, p); | |
7146af97 JB |
4206 | XVECTOR (new)->size = len; |
4207 | return new; | |
4208 | } | |
4209 | ||
34400008 | 4210 | |
7146af97 | 4211 | DEFUN ("purecopy", Fpurecopy, Spurecopy, 1, 1, 0, |
7ee72033 | 4212 | doc: /* Make a copy of OBJECT in pure storage. |
228299fa | 4213 | Recursively copies contents of vectors and cons cells. |
7ee72033 MB |
4214 | Does not copy symbols. Copies strings without text properties. */) |
4215 | (obj) | |
7146af97 JB |
4216 | register Lisp_Object obj; |
4217 | { | |
265a9e55 | 4218 | if (NILP (Vpurify_flag)) |
7146af97 JB |
4219 | return obj; |
4220 | ||
1f0b3fd2 | 4221 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
4222 | return obj; |
4223 | ||
d6dd74bb | 4224 | if (CONSP (obj)) |
70949dac | 4225 | return pure_cons (XCAR (obj), XCDR (obj)); |
d6dd74bb | 4226 | else if (FLOATP (obj)) |
70949dac | 4227 | return make_pure_float (XFLOAT_DATA (obj)); |
d6dd74bb | 4228 | else if (STRINGP (obj)) |
d5db4077 KR |
4229 | return make_pure_string (SDATA (obj), SCHARS (obj), |
4230 | SBYTES (obj), | |
c0696668 | 4231 | STRING_MULTIBYTE (obj)); |
d6dd74bb KH |
4232 | else if (COMPILEDP (obj) || VECTORP (obj)) |
4233 | { | |
4234 | register struct Lisp_Vector *vec; | |
41b867ea AS |
4235 | register int i; |
4236 | EMACS_INT size; | |
d6dd74bb KH |
4237 | |
4238 | size = XVECTOR (obj)->size; | |
7d535c68 KH |
4239 | if (size & PSEUDOVECTOR_FLAG) |
4240 | size &= PSEUDOVECTOR_SIZE_MASK; | |
41b867ea | 4241 | vec = XVECTOR (make_pure_vector (size)); |
d6dd74bb KH |
4242 | for (i = 0; i < size; i++) |
4243 | vec->contents[i] = Fpurecopy (XVECTOR (obj)->contents[i]); | |
4244 | if (COMPILEDP (obj)) | |
4245 | XSETCOMPILED (obj, vec); | |
4246 | else | |
4247 | XSETVECTOR (obj, vec); | |
7146af97 JB |
4248 | return obj; |
4249 | } | |
d6dd74bb KH |
4250 | else if (MARKERP (obj)) |
4251 | error ("Attempt to copy a marker to pure storage"); | |
6bbd7a29 GM |
4252 | |
4253 | return obj; | |
7146af97 | 4254 | } |
2e471eb5 | 4255 | |
34400008 | 4256 | |
7146af97 | 4257 | \f |
34400008 GM |
4258 | /*********************************************************************** |
4259 | Protection from GC | |
4260 | ***********************************************************************/ | |
4261 | ||
2e471eb5 GM |
4262 | /* Put an entry in staticvec, pointing at the variable with address |
4263 | VARADDRESS. */ | |
7146af97 JB |
4264 | |
4265 | void | |
4266 | staticpro (varaddress) | |
4267 | Lisp_Object *varaddress; | |
4268 | { | |
4269 | staticvec[staticidx++] = varaddress; | |
4270 | if (staticidx >= NSTATICS) | |
4271 | abort (); | |
4272 | } | |
4273 | ||
4274 | struct catchtag | |
2e471eb5 | 4275 | { |
7146af97 JB |
4276 | Lisp_Object tag; |
4277 | Lisp_Object val; | |
4278 | struct catchtag *next; | |
2e471eb5 | 4279 | }; |
7146af97 | 4280 | |
7146af97 | 4281 | \f |
34400008 GM |
4282 | /*********************************************************************** |
4283 | Protection from GC | |
4284 | ***********************************************************************/ | |
1a4f1e2c | 4285 | |
e8197642 RS |
4286 | /* Temporarily prevent garbage collection. */ |
4287 | ||
4288 | int | |
4289 | inhibit_garbage_collection () | |
4290 | { | |
aed13378 | 4291 | int count = SPECPDL_INDEX (); |
54defd0d AS |
4292 | int nbits = min (VALBITS, BITS_PER_INT); |
4293 | ||
4294 | specbind (Qgc_cons_threshold, make_number (((EMACS_INT) 1 << (nbits - 1)) - 1)); | |
e8197642 RS |
4295 | return count; |
4296 | } | |
4297 | ||
34400008 | 4298 | |
7146af97 | 4299 | DEFUN ("garbage-collect", Fgarbage_collect, Sgarbage_collect, 0, 0, "", |
7ee72033 | 4300 | doc: /* Reclaim storage for Lisp objects no longer needed. |
e1e37596 RS |
4301 | Garbage collection happens automatically if you cons more than |
4302 | `gc-cons-threshold' bytes of Lisp data since previous garbage collection. | |
4303 | `garbage-collect' normally returns a list with info on amount of space in use: | |
228299fa GM |
4304 | ((USED-CONSES . FREE-CONSES) (USED-SYMS . FREE-SYMS) |
4305 | (USED-MARKERS . FREE-MARKERS) USED-STRING-CHARS USED-VECTOR-SLOTS | |
4306 | (USED-FLOATS . FREE-FLOATS) (USED-INTERVALS . FREE-INTERVALS) | |
4307 | (USED-STRINGS . FREE-STRINGS)) | |
e1e37596 RS |
4308 | However, if there was overflow in pure space, `garbage-collect' |
4309 | returns nil, because real GC can't be done. */) | |
7ee72033 | 4310 | () |
7146af97 | 4311 | { |
7146af97 JB |
4312 | register struct specbinding *bind; |
4313 | struct catchtag *catch; | |
4314 | struct handler *handler; | |
7146af97 JB |
4315 | char stack_top_variable; |
4316 | register int i; | |
6efc7df7 | 4317 | int message_p; |
96117bc7 | 4318 | Lisp_Object total[8]; |
331379bf | 4319 | int count = SPECPDL_INDEX (); |
2c5bd608 DL |
4320 | EMACS_TIME t1, t2, t3; |
4321 | ||
3de0effb RS |
4322 | if (abort_on_gc) |
4323 | abort (); | |
4324 | ||
2c5bd608 | 4325 | EMACS_GET_TIME (t1); |
7146af97 | 4326 | |
9e713715 GM |
4327 | /* Can't GC if pure storage overflowed because we can't determine |
4328 | if something is a pure object or not. */ | |
4329 | if (pure_bytes_used_before_overflow) | |
4330 | return Qnil; | |
4331 | ||
58595309 KH |
4332 | /* In case user calls debug_print during GC, |
4333 | don't let that cause a recursive GC. */ | |
4334 | consing_since_gc = 0; | |
4335 | ||
6efc7df7 GM |
4336 | /* Save what's currently displayed in the echo area. */ |
4337 | message_p = push_message (); | |
c55b0da6 | 4338 | record_unwind_protect (pop_message_unwind, Qnil); |
41c28a37 | 4339 | |
7146af97 JB |
4340 | /* Save a copy of the contents of the stack, for debugging. */ |
4341 | #if MAX_SAVE_STACK > 0 | |
265a9e55 | 4342 | if (NILP (Vpurify_flag)) |
7146af97 JB |
4343 | { |
4344 | i = &stack_top_variable - stack_bottom; | |
4345 | if (i < 0) i = -i; | |
4346 | if (i < MAX_SAVE_STACK) | |
4347 | { | |
4348 | if (stack_copy == 0) | |
9ac0d9e0 | 4349 | stack_copy = (char *) xmalloc (stack_copy_size = i); |
7146af97 | 4350 | else if (stack_copy_size < i) |
9ac0d9e0 | 4351 | stack_copy = (char *) xrealloc (stack_copy, (stack_copy_size = i)); |
7146af97 JB |
4352 | if (stack_copy) |
4353 | { | |
42607681 | 4354 | if ((EMACS_INT) (&stack_top_variable - stack_bottom) > 0) |
7146af97 JB |
4355 | bcopy (stack_bottom, stack_copy, i); |
4356 | else | |
4357 | bcopy (&stack_top_variable, stack_copy, i); | |
4358 | } | |
4359 | } | |
4360 | } | |
4361 | #endif /* MAX_SAVE_STACK > 0 */ | |
4362 | ||
299585ee | 4363 | if (garbage_collection_messages) |
691c4285 | 4364 | message1_nolog ("Garbage collecting..."); |
7146af97 | 4365 | |
6e0fca1d RS |
4366 | BLOCK_INPUT; |
4367 | ||
eec7b73d RS |
4368 | shrink_regexp_cache (); |
4369 | ||
4929a878 | 4370 | /* Don't keep undo information around forever. */ |
7146af97 JB |
4371 | { |
4372 | register struct buffer *nextb = all_buffers; | |
4373 | ||
4374 | while (nextb) | |
4375 | { | |
ffd56f97 JB |
4376 | /* If a buffer's undo list is Qt, that means that undo is |
4377 | turned off in that buffer. Calling truncate_undo_list on | |
4378 | Qt tends to return NULL, which effectively turns undo back on. | |
4379 | So don't call truncate_undo_list if undo_list is Qt. */ | |
4380 | if (! EQ (nextb->undo_list, Qt)) | |
177c0ea7 | 4381 | nextb->undo_list |
502b9b64 JB |
4382 | = truncate_undo_list (nextb->undo_list, undo_limit, |
4383 | undo_strong_limit); | |
e0fead5d AI |
4384 | |
4385 | /* Shrink buffer gaps, but skip indirect and dead buffers. */ | |
4386 | if (nextb->base_buffer == 0 && !NILP (nextb->name)) | |
4387 | { | |
4388 | /* If a buffer's gap size is more than 10% of the buffer | |
4389 | size, or larger than 2000 bytes, then shrink it | |
4390 | accordingly. Keep a minimum size of 20 bytes. */ | |
4391 | int size = min (2000, max (20, (nextb->text->z_byte / 10))); | |
4392 | ||
4393 | if (nextb->text->gap_size > size) | |
4394 | { | |
4395 | struct buffer *save_current = current_buffer; | |
4396 | current_buffer = nextb; | |
4397 | make_gap (-(nextb->text->gap_size - size)); | |
4398 | current_buffer = save_current; | |
4399 | } | |
4400 | } | |
4401 | ||
7146af97 JB |
4402 | nextb = nextb->next; |
4403 | } | |
4404 | } | |
4405 | ||
4406 | gc_in_progress = 1; | |
4407 | ||
c23baf9f | 4408 | /* clear_marks (); */ |
7146af97 | 4409 | |
0930c1a1 | 4410 | /* Mark all the special slots that serve as the roots of accessibility. */ |
7146af97 JB |
4411 | |
4412 | for (i = 0; i < staticidx; i++) | |
49723c04 | 4413 | mark_object (*staticvec[i]); |
34400008 GM |
4414 | |
4415 | #if (GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS \ | |
4416 | || GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS) | |
4417 | mark_stack (); | |
4418 | #else | |
acf5f7d3 SM |
4419 | { |
4420 | register struct gcpro *tail; | |
4421 | for (tail = gcprolist; tail; tail = tail->next) | |
4422 | for (i = 0; i < tail->nvars; i++) | |
0930c1a1 | 4423 | mark_object (tail->var[i]); |
acf5f7d3 | 4424 | } |
34400008 | 4425 | #endif |
177c0ea7 | 4426 | |
630686c8 | 4427 | mark_byte_stack (); |
7146af97 JB |
4428 | for (bind = specpdl; bind != specpdl_ptr; bind++) |
4429 | { | |
49723c04 SM |
4430 | mark_object (bind->symbol); |
4431 | mark_object (bind->old_value); | |
7146af97 JB |
4432 | } |
4433 | for (catch = catchlist; catch; catch = catch->next) | |
4434 | { | |
49723c04 SM |
4435 | mark_object (catch->tag); |
4436 | mark_object (catch->val); | |
177c0ea7 | 4437 | } |
7146af97 JB |
4438 | for (handler = handlerlist; handler; handler = handler->next) |
4439 | { | |
49723c04 SM |
4440 | mark_object (handler->handler); |
4441 | mark_object (handler->var); | |
177c0ea7 | 4442 | } |
b40ea20a | 4443 | mark_backtrace (); |
b875d3f7 | 4444 | mark_kboards (); |
7146af97 | 4445 | |
74c35a48 SM |
4446 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
4447 | mark_stack (); | |
4448 | #endif | |
4449 | ||
4450 | #ifdef USE_GTK | |
4451 | { | |
4452 | extern void xg_mark_data (); | |
4453 | xg_mark_data (); | |
4454 | } | |
4455 | #endif | |
4456 | ||
c37adf23 SM |
4457 | /* Everything is now marked, except for the things that require special |
4458 | finalization, i.e. the undo_list. | |
4459 | Look thru every buffer's undo list | |
4460 | for elements that update markers that were not marked, | |
4461 | and delete them. */ | |
4c315bda RS |
4462 | { |
4463 | register struct buffer *nextb = all_buffers; | |
4464 | ||
4465 | while (nextb) | |
4466 | { | |
4467 | /* If a buffer's undo list is Qt, that means that undo is | |
c37adf23 SM |
4468 | turned off in that buffer. Calling truncate_undo_list on |
4469 | Qt tends to return NULL, which effectively turns undo back on. | |
4470 | So don't call truncate_undo_list if undo_list is Qt. */ | |
4c315bda RS |
4471 | if (! EQ (nextb->undo_list, Qt)) |
4472 | { | |
c37adf23 | 4473 | Lisp_Object tail, prev; |
4c315bda RS |
4474 | tail = nextb->undo_list; |
4475 | prev = Qnil; | |
4476 | while (CONSP (tail)) | |
4477 | { | |
c37adf23 SM |
4478 | if (GC_CONSP (XCAR (tail)) |
4479 | && GC_MARKERP (XCAR (XCAR (tail))) | |
4480 | && !XMARKER (XCAR (XCAR (tail)))->gcmarkbit) | |
4c315bda RS |
4481 | { |
4482 | if (NILP (prev)) | |
c37adf23 | 4483 | nextb->undo_list = tail = XCDR (tail); |
4c315bda | 4484 | else |
f3fbd155 | 4485 | { |
c37adf23 | 4486 | tail = XCDR (tail); |
f3fbd155 KR |
4487 | XSETCDR (prev, tail); |
4488 | } | |
4c315bda RS |
4489 | } |
4490 | else | |
4491 | { | |
4492 | prev = tail; | |
70949dac | 4493 | tail = XCDR (tail); |
4c315bda RS |
4494 | } |
4495 | } | |
4496 | } | |
c37adf23 SM |
4497 | /* Now that we have stripped the elements that need not be in the |
4498 | undo_list any more, we can finally mark the list. */ | |
4499 | mark_object (nextb->undo_list); | |
4c315bda RS |
4500 | |
4501 | nextb = nextb->next; | |
4502 | } | |
4503 | } | |
4504 | ||
c37adf23 | 4505 | gc_sweep (); |
6b67a518 | 4506 | |
7146af97 JB |
4507 | /* Clear the mark bits that we set in certain root slots. */ |
4508 | ||
033a5fa3 | 4509 | unmark_byte_stack (); |
3ef06d12 SM |
4510 | VECTOR_UNMARK (&buffer_defaults); |
4511 | VECTOR_UNMARK (&buffer_local_symbols); | |
7146af97 | 4512 | |
34400008 GM |
4513 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES && 0 |
4514 | dump_zombies (); | |
4515 | #endif | |
4516 | ||
6e0fca1d RS |
4517 | UNBLOCK_INPUT; |
4518 | ||
c23baf9f | 4519 | /* clear_marks (); */ |
7146af97 JB |
4520 | gc_in_progress = 0; |
4521 | ||
4522 | consing_since_gc = 0; | |
4523 | if (gc_cons_threshold < 10000) | |
4524 | gc_cons_threshold = 10000; | |
4525 | ||
299585ee RS |
4526 | if (garbage_collection_messages) |
4527 | { | |
6efc7df7 GM |
4528 | if (message_p || minibuf_level > 0) |
4529 | restore_message (); | |
299585ee RS |
4530 | else |
4531 | message1_nolog ("Garbage collecting...done"); | |
4532 | } | |
7146af97 | 4533 | |
98edb5ff | 4534 | unbind_to (count, Qnil); |
2e471eb5 GM |
4535 | |
4536 | total[0] = Fcons (make_number (total_conses), | |
4537 | make_number (total_free_conses)); | |
4538 | total[1] = Fcons (make_number (total_symbols), | |
4539 | make_number (total_free_symbols)); | |
4540 | total[2] = Fcons (make_number (total_markers), | |
4541 | make_number (total_free_markers)); | |
96117bc7 GM |
4542 | total[3] = make_number (total_string_size); |
4543 | total[4] = make_number (total_vector_size); | |
4544 | total[5] = Fcons (make_number (total_floats), | |
2e471eb5 | 4545 | make_number (total_free_floats)); |
96117bc7 | 4546 | total[6] = Fcons (make_number (total_intervals), |
2e471eb5 | 4547 | make_number (total_free_intervals)); |
96117bc7 | 4548 | total[7] = Fcons (make_number (total_strings), |
2e471eb5 GM |
4549 | make_number (total_free_strings)); |
4550 | ||
34400008 | 4551 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
7146af97 | 4552 | { |
34400008 GM |
4553 | /* Compute average percentage of zombies. */ |
4554 | double nlive = 0; | |
177c0ea7 | 4555 | |
34400008 | 4556 | for (i = 0; i < 7; ++i) |
83fc9c63 DL |
4557 | if (CONSP (total[i])) |
4558 | nlive += XFASTINT (XCAR (total[i])); | |
34400008 GM |
4559 | |
4560 | avg_live = (avg_live * ngcs + nlive) / (ngcs + 1); | |
4561 | max_live = max (nlive, max_live); | |
4562 | avg_zombies = (avg_zombies * ngcs + nzombies) / (ngcs + 1); | |
4563 | max_zombies = max (nzombies, max_zombies); | |
4564 | ++ngcs; | |
4565 | } | |
4566 | #endif | |
7146af97 | 4567 | |
9e713715 GM |
4568 | if (!NILP (Vpost_gc_hook)) |
4569 | { | |
4570 | int count = inhibit_garbage_collection (); | |
4571 | safe_run_hooks (Qpost_gc_hook); | |
4572 | unbind_to (count, Qnil); | |
4573 | } | |
2c5bd608 DL |
4574 | |
4575 | /* Accumulate statistics. */ | |
4576 | EMACS_GET_TIME (t2); | |
4577 | EMACS_SUB_TIME (t3, t2, t1); | |
4578 | if (FLOATP (Vgc_elapsed)) | |
69ab9f85 SM |
4579 | Vgc_elapsed = make_float (XFLOAT_DATA (Vgc_elapsed) + |
4580 | EMACS_SECS (t3) + | |
4581 | EMACS_USECS (t3) * 1.0e-6); | |
2c5bd608 DL |
4582 | gcs_done++; |
4583 | ||
96117bc7 | 4584 | return Flist (sizeof total / sizeof *total, total); |
7146af97 | 4585 | } |
34400008 | 4586 | |
41c28a37 | 4587 | |
3770920e GM |
4588 | /* Mark Lisp objects in glyph matrix MATRIX. Currently the |
4589 | only interesting objects referenced from glyphs are strings. */ | |
41c28a37 GM |
4590 | |
4591 | static void | |
4592 | mark_glyph_matrix (matrix) | |
4593 | struct glyph_matrix *matrix; | |
4594 | { | |
4595 | struct glyph_row *row = matrix->rows; | |
4596 | struct glyph_row *end = row + matrix->nrows; | |
4597 | ||
2e471eb5 GM |
4598 | for (; row < end; ++row) |
4599 | if (row->enabled_p) | |
4600 | { | |
4601 | int area; | |
4602 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
4603 | { | |
4604 | struct glyph *glyph = row->glyphs[area]; | |
4605 | struct glyph *end_glyph = glyph + row->used[area]; | |
177c0ea7 | 4606 | |
2e471eb5 GM |
4607 | for (; glyph < end_glyph; ++glyph) |
4608 | if (GC_STRINGP (glyph->object) | |
4609 | && !STRING_MARKED_P (XSTRING (glyph->object))) | |
49723c04 | 4610 | mark_object (glyph->object); |
2e471eb5 GM |
4611 | } |
4612 | } | |
41c28a37 GM |
4613 | } |
4614 | ||
34400008 | 4615 | |
41c28a37 GM |
4616 | /* Mark Lisp faces in the face cache C. */ |
4617 | ||
4618 | static void | |
4619 | mark_face_cache (c) | |
4620 | struct face_cache *c; | |
4621 | { | |
4622 | if (c) | |
4623 | { | |
4624 | int i, j; | |
4625 | for (i = 0; i < c->used; ++i) | |
4626 | { | |
4627 | struct face *face = FACE_FROM_ID (c->f, i); | |
4628 | ||
4629 | if (face) | |
4630 | { | |
4631 | for (j = 0; j < LFACE_VECTOR_SIZE; ++j) | |
49723c04 | 4632 | mark_object (face->lface[j]); |
41c28a37 GM |
4633 | } |
4634 | } | |
4635 | } | |
4636 | } | |
4637 | ||
4638 | ||
4639 | #ifdef HAVE_WINDOW_SYSTEM | |
4640 | ||
4641 | /* Mark Lisp objects in image IMG. */ | |
4642 | ||
4643 | static void | |
4644 | mark_image (img) | |
4645 | struct image *img; | |
4646 | { | |
49723c04 | 4647 | mark_object (img->spec); |
177c0ea7 | 4648 | |
3e60b029 | 4649 | if (!NILP (img->data.lisp_val)) |
49723c04 | 4650 | mark_object (img->data.lisp_val); |
41c28a37 GM |
4651 | } |
4652 | ||
4653 | ||
4654 | /* Mark Lisp objects in image cache of frame F. It's done this way so | |
4655 | that we don't have to include xterm.h here. */ | |
4656 | ||
4657 | static void | |
4658 | mark_image_cache (f) | |
4659 | struct frame *f; | |
4660 | { | |
4661 | forall_images_in_image_cache (f, mark_image); | |
4662 | } | |
4663 | ||
4664 | #endif /* HAVE_X_WINDOWS */ | |
4665 | ||
4666 | ||
7146af97 | 4667 | \f |
1a4f1e2c | 4668 | /* Mark reference to a Lisp_Object. |
2e471eb5 GM |
4669 | If the object referred to has not been seen yet, recursively mark |
4670 | all the references contained in it. */ | |
7146af97 | 4671 | |
785cd37f | 4672 | #define LAST_MARKED_SIZE 500 |
49723c04 | 4673 | Lisp_Object last_marked[LAST_MARKED_SIZE]; |
785cd37f RS |
4674 | int last_marked_index; |
4675 | ||
1342fc6f RS |
4676 | /* For debugging--call abort when we cdr down this many |
4677 | links of a list, in mark_object. In debugging, | |
4678 | the call to abort will hit a breakpoint. | |
4679 | Normally this is zero and the check never goes off. */ | |
4680 | int mark_object_loop_halt; | |
4681 | ||
41c28a37 | 4682 | void |
49723c04 SM |
4683 | mark_object (arg) |
4684 | Lisp_Object arg; | |
7146af97 | 4685 | { |
49723c04 | 4686 | register Lisp_Object obj = arg; |
4f5c1376 GM |
4687 | #ifdef GC_CHECK_MARKED_OBJECTS |
4688 | void *po; | |
4689 | struct mem_node *m; | |
4690 | #endif | |
1342fc6f | 4691 | int cdr_count = 0; |
7146af97 | 4692 | |
9149e743 | 4693 | loop: |
7146af97 | 4694 | |
1f0b3fd2 | 4695 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
4696 | return; |
4697 | ||
49723c04 | 4698 | last_marked[last_marked_index++] = obj; |
785cd37f RS |
4699 | if (last_marked_index == LAST_MARKED_SIZE) |
4700 | last_marked_index = 0; | |
4701 | ||
4f5c1376 GM |
4702 | /* Perform some sanity checks on the objects marked here. Abort if |
4703 | we encounter an object we know is bogus. This increases GC time | |
4704 | by ~80%, and requires compilation with GC_MARK_STACK != 0. */ | |
4705 | #ifdef GC_CHECK_MARKED_OBJECTS | |
4706 | ||
4707 | po = (void *) XPNTR (obj); | |
4708 | ||
4709 | /* Check that the object pointed to by PO is known to be a Lisp | |
4710 | structure allocated from the heap. */ | |
4711 | #define CHECK_ALLOCATED() \ | |
4712 | do { \ | |
4713 | m = mem_find (po); \ | |
4714 | if (m == MEM_NIL) \ | |
4715 | abort (); \ | |
4716 | } while (0) | |
4717 | ||
4718 | /* Check that the object pointed to by PO is live, using predicate | |
4719 | function LIVEP. */ | |
4720 | #define CHECK_LIVE(LIVEP) \ | |
4721 | do { \ | |
4722 | if (!LIVEP (m, po)) \ | |
4723 | abort (); \ | |
4724 | } while (0) | |
4725 | ||
4726 | /* Check both of the above conditions. */ | |
4727 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) \ | |
4728 | do { \ | |
4729 | CHECK_ALLOCATED (); \ | |
4730 | CHECK_LIVE (LIVEP); \ | |
4731 | } while (0) \ | |
177c0ea7 | 4732 | |
4f5c1376 | 4733 | #else /* not GC_CHECK_MARKED_OBJECTS */ |
177c0ea7 | 4734 | |
4f5c1376 GM |
4735 | #define CHECK_ALLOCATED() (void) 0 |
4736 | #define CHECK_LIVE(LIVEP) (void) 0 | |
4737 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) (void) 0 | |
177c0ea7 | 4738 | |
4f5c1376 GM |
4739 | #endif /* not GC_CHECK_MARKED_OBJECTS */ |
4740 | ||
0220c518 | 4741 | switch (SWITCH_ENUM_CAST (XGCTYPE (obj))) |
7146af97 JB |
4742 | { |
4743 | case Lisp_String: | |
4744 | { | |
4745 | register struct Lisp_String *ptr = XSTRING (obj); | |
4f5c1376 | 4746 | CHECK_ALLOCATED_AND_LIVE (live_string_p); |
d5e35230 | 4747 | MARK_INTERVAL_TREE (ptr->intervals); |
2e471eb5 | 4748 | MARK_STRING (ptr); |
361b097f | 4749 | #ifdef GC_CHECK_STRING_BYTES |
676a7251 GM |
4750 | /* Check that the string size recorded in the string is the |
4751 | same as the one recorded in the sdata structure. */ | |
4752 | CHECK_STRING_BYTES (ptr); | |
361b097f | 4753 | #endif /* GC_CHECK_STRING_BYTES */ |
7146af97 JB |
4754 | } |
4755 | break; | |
4756 | ||
76437631 | 4757 | case Lisp_Vectorlike: |
4f5c1376 GM |
4758 | #ifdef GC_CHECK_MARKED_OBJECTS |
4759 | m = mem_find (po); | |
4760 | if (m == MEM_NIL && !GC_SUBRP (obj) | |
4761 | && po != &buffer_defaults | |
4762 | && po != &buffer_local_symbols) | |
4763 | abort (); | |
4764 | #endif /* GC_CHECK_MARKED_OBJECTS */ | |
177c0ea7 | 4765 | |
30e3190a | 4766 | if (GC_BUFFERP (obj)) |
6b552283 | 4767 | { |
3ef06d12 | 4768 | if (!VECTOR_MARKED_P (XBUFFER (obj))) |
4f5c1376 GM |
4769 | { |
4770 | #ifdef GC_CHECK_MARKED_OBJECTS | |
4771 | if (po != &buffer_defaults && po != &buffer_local_symbols) | |
4772 | { | |
4773 | struct buffer *b; | |
4774 | for (b = all_buffers; b && b != po; b = b->next) | |
4775 | ; | |
4776 | if (b == NULL) | |
4777 | abort (); | |
4778 | } | |
4779 | #endif /* GC_CHECK_MARKED_OBJECTS */ | |
4780 | mark_buffer (obj); | |
4781 | } | |
6b552283 | 4782 | } |
30e3190a | 4783 | else if (GC_SUBRP (obj)) |
169ee243 RS |
4784 | break; |
4785 | else if (GC_COMPILEDP (obj)) | |
2e471eb5 GM |
4786 | /* We could treat this just like a vector, but it is better to |
4787 | save the COMPILED_CONSTANTS element for last and avoid | |
4788 | recursion there. */ | |
169ee243 RS |
4789 | { |
4790 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4791 | register EMACS_INT size = ptr->size; | |
169ee243 RS |
4792 | register int i; |
4793 | ||
3ef06d12 | 4794 | if (VECTOR_MARKED_P (ptr)) |
169ee243 | 4795 | break; /* Already marked */ |
177c0ea7 | 4796 | |
4f5c1376 | 4797 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 4798 | VECTOR_MARK (ptr); /* Else mark it */ |
76437631 | 4799 | size &= PSEUDOVECTOR_SIZE_MASK; |
169ee243 RS |
4800 | for (i = 0; i < size; i++) /* and then mark its elements */ |
4801 | { | |
4802 | if (i != COMPILED_CONSTANTS) | |
49723c04 | 4803 | mark_object (ptr->contents[i]); |
169ee243 | 4804 | } |
49723c04 | 4805 | obj = ptr->contents[COMPILED_CONSTANTS]; |
169ee243 RS |
4806 | goto loop; |
4807 | } | |
169ee243 RS |
4808 | else if (GC_FRAMEP (obj)) |
4809 | { | |
c70bbf06 | 4810 | register struct frame *ptr = XFRAME (obj); |
169ee243 | 4811 | |
3ef06d12 SM |
4812 | if (VECTOR_MARKED_P (ptr)) break; /* Already marked */ |
4813 | VECTOR_MARK (ptr); /* Else mark it */ | |
169ee243 | 4814 | |
4f5c1376 | 4815 | CHECK_LIVE (live_vector_p); |
49723c04 SM |
4816 | mark_object (ptr->name); |
4817 | mark_object (ptr->icon_name); | |
4818 | mark_object (ptr->title); | |
4819 | mark_object (ptr->focus_frame); | |
4820 | mark_object (ptr->selected_window); | |
4821 | mark_object (ptr->minibuffer_window); | |
4822 | mark_object (ptr->param_alist); | |
4823 | mark_object (ptr->scroll_bars); | |
4824 | mark_object (ptr->condemned_scroll_bars); | |
4825 | mark_object (ptr->menu_bar_items); | |
4826 | mark_object (ptr->face_alist); | |
4827 | mark_object (ptr->menu_bar_vector); | |
4828 | mark_object (ptr->buffer_predicate); | |
4829 | mark_object (ptr->buffer_list); | |
4830 | mark_object (ptr->menu_bar_window); | |
4831 | mark_object (ptr->tool_bar_window); | |
41c28a37 GM |
4832 | mark_face_cache (ptr->face_cache); |
4833 | #ifdef HAVE_WINDOW_SYSTEM | |
4834 | mark_image_cache (ptr); | |
49723c04 SM |
4835 | mark_object (ptr->tool_bar_items); |
4836 | mark_object (ptr->desired_tool_bar_string); | |
4837 | mark_object (ptr->current_tool_bar_string); | |
41c28a37 | 4838 | #endif /* HAVE_WINDOW_SYSTEM */ |
169ee243 | 4839 | } |
7b07587b | 4840 | else if (GC_BOOL_VECTOR_P (obj)) |
707788bd RS |
4841 | { |
4842 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4843 | ||
3ef06d12 | 4844 | if (VECTOR_MARKED_P (ptr)) |
707788bd | 4845 | break; /* Already marked */ |
4f5c1376 | 4846 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 4847 | VECTOR_MARK (ptr); /* Else mark it */ |
707788bd | 4848 | } |
41c28a37 GM |
4849 | else if (GC_WINDOWP (obj)) |
4850 | { | |
4851 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4852 | struct window *w = XWINDOW (obj); | |
41c28a37 GM |
4853 | register int i; |
4854 | ||
4855 | /* Stop if already marked. */ | |
3ef06d12 | 4856 | if (VECTOR_MARKED_P (ptr)) |
41c28a37 GM |
4857 | break; |
4858 | ||
4859 | /* Mark it. */ | |
4f5c1376 | 4860 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 4861 | VECTOR_MARK (ptr); |
41c28a37 GM |
4862 | |
4863 | /* There is no Lisp data above The member CURRENT_MATRIX in | |
4864 | struct WINDOW. Stop marking when that slot is reached. */ | |
4865 | for (i = 0; | |
c70bbf06 | 4866 | (char *) &ptr->contents[i] < (char *) &w->current_matrix; |
41c28a37 | 4867 | i++) |
49723c04 | 4868 | mark_object (ptr->contents[i]); |
41c28a37 GM |
4869 | |
4870 | /* Mark glyphs for leaf windows. Marking window matrices is | |
4871 | sufficient because frame matrices use the same glyph | |
4872 | memory. */ | |
4873 | if (NILP (w->hchild) | |
4874 | && NILP (w->vchild) | |
4875 | && w->current_matrix) | |
4876 | { | |
4877 | mark_glyph_matrix (w->current_matrix); | |
4878 | mark_glyph_matrix (w->desired_matrix); | |
4879 | } | |
4880 | } | |
4881 | else if (GC_HASH_TABLE_P (obj)) | |
4882 | { | |
4883 | struct Lisp_Hash_Table *h = XHASH_TABLE (obj); | |
177c0ea7 | 4884 | |
41c28a37 | 4885 | /* Stop if already marked. */ |
3ef06d12 | 4886 | if (VECTOR_MARKED_P (h)) |
41c28a37 | 4887 | break; |
177c0ea7 | 4888 | |
41c28a37 | 4889 | /* Mark it. */ |
4f5c1376 | 4890 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 4891 | VECTOR_MARK (h); |
41c28a37 GM |
4892 | |
4893 | /* Mark contents. */ | |
94a877ef | 4894 | /* Do not mark next_free or next_weak. |
177c0ea7 | 4895 | Being in the next_weak chain |
94a877ef RS |
4896 | should not keep the hash table alive. |
4897 | No need to mark `count' since it is an integer. */ | |
49723c04 SM |
4898 | mark_object (h->test); |
4899 | mark_object (h->weak); | |
4900 | mark_object (h->rehash_size); | |
4901 | mark_object (h->rehash_threshold); | |
4902 | mark_object (h->hash); | |
4903 | mark_object (h->next); | |
4904 | mark_object (h->index); | |
4905 | mark_object (h->user_hash_function); | |
4906 | mark_object (h->user_cmp_function); | |
41c28a37 GM |
4907 | |
4908 | /* If hash table is not weak, mark all keys and values. | |
4909 | For weak tables, mark only the vector. */ | |
4910 | if (GC_NILP (h->weak)) | |
49723c04 | 4911 | mark_object (h->key_and_value); |
41c28a37 | 4912 | else |
3ef06d12 | 4913 | VECTOR_MARK (XVECTOR (h->key_and_value)); |
41c28a37 | 4914 | } |
04ff9756 | 4915 | else |
169ee243 RS |
4916 | { |
4917 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
4918 | register EMACS_INT size = ptr->size; | |
169ee243 RS |
4919 | register int i; |
4920 | ||
3ef06d12 | 4921 | if (VECTOR_MARKED_P (ptr)) break; /* Already marked */ |
4f5c1376 | 4922 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 4923 | VECTOR_MARK (ptr); /* Else mark it */ |
169ee243 RS |
4924 | if (size & PSEUDOVECTOR_FLAG) |
4925 | size &= PSEUDOVECTOR_SIZE_MASK; | |
41c28a37 | 4926 | |
169ee243 | 4927 | for (i = 0; i < size; i++) /* and then mark its elements */ |
49723c04 | 4928 | mark_object (ptr->contents[i]); |
169ee243 RS |
4929 | } |
4930 | break; | |
7146af97 | 4931 | |
7146af97 JB |
4932 | case Lisp_Symbol: |
4933 | { | |
c70bbf06 | 4934 | register struct Lisp_Symbol *ptr = XSYMBOL (obj); |
7146af97 JB |
4935 | struct Lisp_Symbol *ptrx; |
4936 | ||
2336fe58 | 4937 | if (ptr->gcmarkbit) break; |
4f5c1376 | 4938 | CHECK_ALLOCATED_AND_LIVE (live_symbol_p); |
2336fe58 | 4939 | ptr->gcmarkbit = 1; |
49723c04 SM |
4940 | mark_object (ptr->value); |
4941 | mark_object (ptr->function); | |
4942 | mark_object (ptr->plist); | |
34400008 | 4943 | |
8fe5665d KR |
4944 | if (!PURE_POINTER_P (XSTRING (ptr->xname))) |
4945 | MARK_STRING (XSTRING (ptr->xname)); | |
d5db4077 | 4946 | MARK_INTERVAL_TREE (STRING_INTERVALS (ptr->xname)); |
177c0ea7 | 4947 | |
1c6bb482 RS |
4948 | /* Note that we do not mark the obarray of the symbol. |
4949 | It is safe not to do so because nothing accesses that | |
4950 | slot except to check whether it is nil. */ | |
7146af97 JB |
4951 | ptr = ptr->next; |
4952 | if (ptr) | |
4953 | { | |
b0846f52 | 4954 | ptrx = ptr; /* Use of ptrx avoids compiler bug on Sun */ |
7146af97 | 4955 | XSETSYMBOL (obj, ptrx); |
49723c04 | 4956 | goto loop; |
7146af97 JB |
4957 | } |
4958 | } | |
4959 | break; | |
4960 | ||
a0a38eb7 | 4961 | case Lisp_Misc: |
4f5c1376 | 4962 | CHECK_ALLOCATED_AND_LIVE (live_misc_p); |
2336fe58 SM |
4963 | if (XMARKER (obj)->gcmarkbit) |
4964 | break; | |
4965 | XMARKER (obj)->gcmarkbit = 1; | |
a5da44fe | 4966 | switch (XMISCTYPE (obj)) |
a0a38eb7 | 4967 | { |
465edf35 KH |
4968 | case Lisp_Misc_Buffer_Local_Value: |
4969 | case Lisp_Misc_Some_Buffer_Local_Value: | |
4970 | { | |
4971 | register struct Lisp_Buffer_Local_Value *ptr | |
4972 | = XBUFFER_LOCAL_VALUE (obj); | |
465edf35 KH |
4973 | /* If the cdr is nil, avoid recursion for the car. */ |
4974 | if (EQ (ptr->cdr, Qnil)) | |
4975 | { | |
49723c04 | 4976 | obj = ptr->realvalue; |
465edf35 KH |
4977 | goto loop; |
4978 | } | |
49723c04 SM |
4979 | mark_object (ptr->realvalue); |
4980 | mark_object (ptr->buffer); | |
4981 | mark_object (ptr->frame); | |
4982 | obj = ptr->cdr; | |
465edf35 KH |
4983 | goto loop; |
4984 | } | |
4985 | ||
2336fe58 SM |
4986 | case Lisp_Misc_Marker: |
4987 | /* DO NOT mark thru the marker's chain. | |
4988 | The buffer's markers chain does not preserve markers from gc; | |
4989 | instead, markers are removed from the chain when freed by gc. */ | |
c8616056 KH |
4990 | case Lisp_Misc_Intfwd: |
4991 | case Lisp_Misc_Boolfwd: | |
4992 | case Lisp_Misc_Objfwd: | |
4993 | case Lisp_Misc_Buffer_Objfwd: | |
b875d3f7 | 4994 | case Lisp_Misc_Kboard_Objfwd: |
c8616056 KH |
4995 | /* Don't bother with Lisp_Buffer_Objfwd, |
4996 | since all markable slots in current buffer marked anyway. */ | |
4997 | /* Don't need to do Lisp_Objfwd, since the places they point | |
4998 | are protected with staticpro. */ | |
f29181dc | 4999 | case Lisp_Misc_Save_Value: |
c8616056 KH |
5000 | break; |
5001 | ||
e202fa34 KH |
5002 | case Lisp_Misc_Overlay: |
5003 | { | |
5004 | struct Lisp_Overlay *ptr = XOVERLAY (obj); | |
49723c04 SM |
5005 | mark_object (ptr->start); |
5006 | mark_object (ptr->end); | |
f54253ec SM |
5007 | mark_object (ptr->plist); |
5008 | if (ptr->next) | |
5009 | { | |
5010 | XSETMISC (obj, ptr->next); | |
5011 | goto loop; | |
5012 | } | |
e202fa34 KH |
5013 | } |
5014 | break; | |
5015 | ||
a0a38eb7 KH |
5016 | default: |
5017 | abort (); | |
5018 | } | |
7146af97 JB |
5019 | break; |
5020 | ||
5021 | case Lisp_Cons: | |
7146af97 JB |
5022 | { |
5023 | register struct Lisp_Cons *ptr = XCONS (obj); | |
08b7c2cb | 5024 | if (CONS_MARKED_P (ptr)) break; |
4f5c1376 | 5025 | CHECK_ALLOCATED_AND_LIVE (live_cons_p); |
08b7c2cb | 5026 | CONS_MARK (ptr); |
c54ca951 RS |
5027 | /* If the cdr is nil, avoid recursion for the car. */ |
5028 | if (EQ (ptr->cdr, Qnil)) | |
5029 | { | |
49723c04 | 5030 | obj = ptr->car; |
1342fc6f | 5031 | cdr_count = 0; |
c54ca951 RS |
5032 | goto loop; |
5033 | } | |
49723c04 SM |
5034 | mark_object (ptr->car); |
5035 | obj = ptr->cdr; | |
1342fc6f RS |
5036 | cdr_count++; |
5037 | if (cdr_count == mark_object_loop_halt) | |
5038 | abort (); | |
7146af97 JB |
5039 | goto loop; |
5040 | } | |
5041 | ||
7146af97 | 5042 | case Lisp_Float: |
4f5c1376 | 5043 | CHECK_ALLOCATED_AND_LIVE (live_float_p); |
ab6780cd | 5044 | FLOAT_MARK (XFLOAT (obj)); |
7146af97 | 5045 | break; |
7146af97 | 5046 | |
7146af97 | 5047 | case Lisp_Int: |
7146af97 JB |
5048 | break; |
5049 | ||
5050 | default: | |
5051 | abort (); | |
5052 | } | |
4f5c1376 GM |
5053 | |
5054 | #undef CHECK_LIVE | |
5055 | #undef CHECK_ALLOCATED | |
5056 | #undef CHECK_ALLOCATED_AND_LIVE | |
7146af97 JB |
5057 | } |
5058 | ||
5059 | /* Mark the pointers in a buffer structure. */ | |
5060 | ||
5061 | static void | |
5062 | mark_buffer (buf) | |
5063 | Lisp_Object buf; | |
5064 | { | |
7146af97 | 5065 | register struct buffer *buffer = XBUFFER (buf); |
f54253ec | 5066 | register Lisp_Object *ptr, tmp; |
30e3190a | 5067 | Lisp_Object base_buffer; |
7146af97 | 5068 | |
3ef06d12 | 5069 | VECTOR_MARK (buffer); |
7146af97 | 5070 | |
30e3190a | 5071 | MARK_INTERVAL_TREE (BUF_INTERVALS (buffer)); |
d5e35230 | 5072 | |
c37adf23 SM |
5073 | /* For now, we just don't mark the undo_list. It's done later in |
5074 | a special way just before the sweep phase, and after stripping | |
5075 | some of its elements that are not needed any more. */ | |
4c315bda | 5076 | |
f54253ec SM |
5077 | if (buffer->overlays_before) |
5078 | { | |
5079 | XSETMISC (tmp, buffer->overlays_before); | |
5080 | mark_object (tmp); | |
5081 | } | |
5082 | if (buffer->overlays_after) | |
5083 | { | |
5084 | XSETMISC (tmp, buffer->overlays_after); | |
5085 | mark_object (tmp); | |
5086 | } | |
5087 | ||
3ef06d12 | 5088 | for (ptr = &buffer->name; |
7146af97 JB |
5089 | (char *)ptr < (char *)buffer + sizeof (struct buffer); |
5090 | ptr++) | |
49723c04 | 5091 | mark_object (*ptr); |
30e3190a RS |
5092 | |
5093 | /* If this is an indirect buffer, mark its base buffer. */ | |
349bd9ed | 5094 | if (buffer->base_buffer && !VECTOR_MARKED_P (buffer->base_buffer)) |
30e3190a | 5095 | { |
177c0ea7 | 5096 | XSETBUFFER (base_buffer, buffer->base_buffer); |
30e3190a RS |
5097 | mark_buffer (base_buffer); |
5098 | } | |
7146af97 | 5099 | } |
084b1a0c KH |
5100 | |
5101 | ||
41c28a37 GM |
5102 | /* Value is non-zero if OBJ will survive the current GC because it's |
5103 | either marked or does not need to be marked to survive. */ | |
5104 | ||
5105 | int | |
5106 | survives_gc_p (obj) | |
5107 | Lisp_Object obj; | |
5108 | { | |
5109 | int survives_p; | |
177c0ea7 | 5110 | |
41c28a37 GM |
5111 | switch (XGCTYPE (obj)) |
5112 | { | |
5113 | case Lisp_Int: | |
5114 | survives_p = 1; | |
5115 | break; | |
5116 | ||
5117 | case Lisp_Symbol: | |
2336fe58 | 5118 | survives_p = XSYMBOL (obj)->gcmarkbit; |
41c28a37 GM |
5119 | break; |
5120 | ||
5121 | case Lisp_Misc: | |
ef89c2ce | 5122 | survives_p = XMARKER (obj)->gcmarkbit; |
41c28a37 GM |
5123 | break; |
5124 | ||
5125 | case Lisp_String: | |
08b7c2cb | 5126 | survives_p = STRING_MARKED_P (XSTRING (obj)); |
41c28a37 GM |
5127 | break; |
5128 | ||
5129 | case Lisp_Vectorlike: | |
08b7c2cb | 5130 | survives_p = GC_SUBRP (obj) || VECTOR_MARKED_P (XVECTOR (obj)); |
41c28a37 GM |
5131 | break; |
5132 | ||
5133 | case Lisp_Cons: | |
08b7c2cb | 5134 | survives_p = CONS_MARKED_P (XCONS (obj)); |
41c28a37 GM |
5135 | break; |
5136 | ||
41c28a37 | 5137 | case Lisp_Float: |
ab6780cd | 5138 | survives_p = FLOAT_MARKED_P (XFLOAT (obj)); |
41c28a37 | 5139 | break; |
41c28a37 GM |
5140 | |
5141 | default: | |
5142 | abort (); | |
5143 | } | |
5144 | ||
34400008 | 5145 | return survives_p || PURE_POINTER_P ((void *) XPNTR (obj)); |
41c28a37 GM |
5146 | } |
5147 | ||
5148 | ||
7146af97 | 5149 | \f |
1a4f1e2c | 5150 | /* Sweep: find all structures not marked, and free them. */ |
7146af97 JB |
5151 | |
5152 | static void | |
5153 | gc_sweep () | |
5154 | { | |
c37adf23 SM |
5155 | /* Remove or mark entries in weak hash tables. |
5156 | This must be done before any object is unmarked. */ | |
5157 | sweep_weak_hash_tables (); | |
5158 | ||
5159 | sweep_strings (); | |
5160 | #ifdef GC_CHECK_STRING_BYTES | |
5161 | if (!noninteractive) | |
5162 | check_string_bytes (1); | |
5163 | #endif | |
5164 | ||
7146af97 JB |
5165 | /* Put all unmarked conses on free list */ |
5166 | { | |
5167 | register struct cons_block *cblk; | |
6ca94ac9 | 5168 | struct cons_block **cprev = &cons_block; |
7146af97 JB |
5169 | register int lim = cons_block_index; |
5170 | register int num_free = 0, num_used = 0; | |
5171 | ||
5172 | cons_free_list = 0; | |
177c0ea7 | 5173 | |
6ca94ac9 | 5174 | for (cblk = cons_block; cblk; cblk = *cprev) |
7146af97 JB |
5175 | { |
5176 | register int i; | |
6ca94ac9 | 5177 | int this_free = 0; |
7146af97 | 5178 | for (i = 0; i < lim; i++) |
08b7c2cb | 5179 | if (!CONS_MARKED_P (&cblk->conses[i])) |
7146af97 | 5180 | { |
6ca94ac9 | 5181 | this_free++; |
1cd5fe6a | 5182 | *(struct Lisp_Cons **)&cblk->conses[i].cdr = cons_free_list; |
7146af97 | 5183 | cons_free_list = &cblk->conses[i]; |
34400008 GM |
5184 | #if GC_MARK_STACK |
5185 | cons_free_list->car = Vdead; | |
5186 | #endif | |
7146af97 JB |
5187 | } |
5188 | else | |
5189 | { | |
5190 | num_used++; | |
08b7c2cb | 5191 | CONS_UNMARK (&cblk->conses[i]); |
7146af97 JB |
5192 | } |
5193 | lim = CONS_BLOCK_SIZE; | |
6ca94ac9 KH |
5194 | /* If this block contains only free conses and we have already |
5195 | seen more than two blocks worth of free conses then deallocate | |
5196 | this block. */ | |
6feef451 | 5197 | if (this_free == CONS_BLOCK_SIZE && num_free > CONS_BLOCK_SIZE) |
6ca94ac9 | 5198 | { |
6ca94ac9 KH |
5199 | *cprev = cblk->next; |
5200 | /* Unhook from the free list. */ | |
5201 | cons_free_list = *(struct Lisp_Cons **) &cblk->conses[0].cdr; | |
08b7c2cb | 5202 | lisp_align_free (cblk); |
c8099634 | 5203 | n_cons_blocks--; |
6ca94ac9 KH |
5204 | } |
5205 | else | |
6feef451 AS |
5206 | { |
5207 | num_free += this_free; | |
5208 | cprev = &cblk->next; | |
5209 | } | |
7146af97 JB |
5210 | } |
5211 | total_conses = num_used; | |
5212 | total_free_conses = num_free; | |
5213 | } | |
5214 | ||
7146af97 JB |
5215 | /* Put all unmarked floats on free list */ |
5216 | { | |
5217 | register struct float_block *fblk; | |
6ca94ac9 | 5218 | struct float_block **fprev = &float_block; |
7146af97 JB |
5219 | register int lim = float_block_index; |
5220 | register int num_free = 0, num_used = 0; | |
5221 | ||
5222 | float_free_list = 0; | |
177c0ea7 | 5223 | |
6ca94ac9 | 5224 | for (fblk = float_block; fblk; fblk = *fprev) |
7146af97 JB |
5225 | { |
5226 | register int i; | |
6ca94ac9 | 5227 | int this_free = 0; |
7146af97 | 5228 | for (i = 0; i < lim; i++) |
ab6780cd | 5229 | if (!FLOAT_MARKED_P (&fblk->floats[i])) |
7146af97 | 5230 | { |
6ca94ac9 | 5231 | this_free++; |
1cd5fe6a | 5232 | *(struct Lisp_Float **)&fblk->floats[i].data = float_free_list; |
7146af97 JB |
5233 | float_free_list = &fblk->floats[i]; |
5234 | } | |
5235 | else | |
5236 | { | |
5237 | num_used++; | |
ab6780cd | 5238 | FLOAT_UNMARK (&fblk->floats[i]); |
7146af97 JB |
5239 | } |
5240 | lim = FLOAT_BLOCK_SIZE; | |
6ca94ac9 KH |
5241 | /* If this block contains only free floats and we have already |
5242 | seen more than two blocks worth of free floats then deallocate | |
5243 | this block. */ | |
6feef451 | 5244 | if (this_free == FLOAT_BLOCK_SIZE && num_free > FLOAT_BLOCK_SIZE) |
6ca94ac9 | 5245 | { |
6ca94ac9 KH |
5246 | *fprev = fblk->next; |
5247 | /* Unhook from the free list. */ | |
5248 | float_free_list = *(struct Lisp_Float **) &fblk->floats[0].data; | |
ab6780cd | 5249 | lisp_align_free (fblk); |
c8099634 | 5250 | n_float_blocks--; |
6ca94ac9 KH |
5251 | } |
5252 | else | |
6feef451 AS |
5253 | { |
5254 | num_free += this_free; | |
5255 | fprev = &fblk->next; | |
5256 | } | |
7146af97 JB |
5257 | } |
5258 | total_floats = num_used; | |
5259 | total_free_floats = num_free; | |
5260 | } | |
7146af97 | 5261 | |
d5e35230 JA |
5262 | /* Put all unmarked intervals on free list */ |
5263 | { | |
5264 | register struct interval_block *iblk; | |
6ca94ac9 | 5265 | struct interval_block **iprev = &interval_block; |
d5e35230 JA |
5266 | register int lim = interval_block_index; |
5267 | register int num_free = 0, num_used = 0; | |
5268 | ||
5269 | interval_free_list = 0; | |
5270 | ||
6ca94ac9 | 5271 | for (iblk = interval_block; iblk; iblk = *iprev) |
d5e35230 JA |
5272 | { |
5273 | register int i; | |
6ca94ac9 | 5274 | int this_free = 0; |
d5e35230 JA |
5275 | |
5276 | for (i = 0; i < lim; i++) | |
5277 | { | |
2336fe58 | 5278 | if (!iblk->intervals[i].gcmarkbit) |
d5e35230 | 5279 | { |
439d5cb4 | 5280 | SET_INTERVAL_PARENT (&iblk->intervals[i], interval_free_list); |
d5e35230 | 5281 | interval_free_list = &iblk->intervals[i]; |
6ca94ac9 | 5282 | this_free++; |
d5e35230 JA |
5283 | } |
5284 | else | |
5285 | { | |
5286 | num_used++; | |
2336fe58 | 5287 | iblk->intervals[i].gcmarkbit = 0; |
d5e35230 JA |
5288 | } |
5289 | } | |
5290 | lim = INTERVAL_BLOCK_SIZE; | |
6ca94ac9 KH |
5291 | /* If this block contains only free intervals and we have already |
5292 | seen more than two blocks worth of free intervals then | |
5293 | deallocate this block. */ | |
6feef451 | 5294 | if (this_free == INTERVAL_BLOCK_SIZE && num_free > INTERVAL_BLOCK_SIZE) |
6ca94ac9 | 5295 | { |
6ca94ac9 KH |
5296 | *iprev = iblk->next; |
5297 | /* Unhook from the free list. */ | |
439d5cb4 | 5298 | interval_free_list = INTERVAL_PARENT (&iblk->intervals[0]); |
c8099634 RS |
5299 | lisp_free (iblk); |
5300 | n_interval_blocks--; | |
6ca94ac9 KH |
5301 | } |
5302 | else | |
6feef451 AS |
5303 | { |
5304 | num_free += this_free; | |
5305 | iprev = &iblk->next; | |
5306 | } | |
d5e35230 JA |
5307 | } |
5308 | total_intervals = num_used; | |
5309 | total_free_intervals = num_free; | |
5310 | } | |
d5e35230 | 5311 | |
7146af97 JB |
5312 | /* Put all unmarked symbols on free list */ |
5313 | { | |
5314 | register struct symbol_block *sblk; | |
6ca94ac9 | 5315 | struct symbol_block **sprev = &symbol_block; |
7146af97 JB |
5316 | register int lim = symbol_block_index; |
5317 | register int num_free = 0, num_used = 0; | |
5318 | ||
d285b373 | 5319 | symbol_free_list = NULL; |
177c0ea7 | 5320 | |
6ca94ac9 | 5321 | for (sblk = symbol_block; sblk; sblk = *sprev) |
7146af97 | 5322 | { |
6ca94ac9 | 5323 | int this_free = 0; |
d285b373 GM |
5324 | struct Lisp_Symbol *sym = sblk->symbols; |
5325 | struct Lisp_Symbol *end = sym + lim; | |
5326 | ||
5327 | for (; sym < end; ++sym) | |
5328 | { | |
20035321 SM |
5329 | /* Check if the symbol was created during loadup. In such a case |
5330 | it might be pointed to by pure bytecode which we don't trace, | |
5331 | so we conservatively assume that it is live. */ | |
8fe5665d | 5332 | int pure_p = PURE_POINTER_P (XSTRING (sym->xname)); |
177c0ea7 | 5333 | |
2336fe58 | 5334 | if (!sym->gcmarkbit && !pure_p) |
d285b373 GM |
5335 | { |
5336 | *(struct Lisp_Symbol **) &sym->value = symbol_free_list; | |
5337 | symbol_free_list = sym; | |
34400008 | 5338 | #if GC_MARK_STACK |
d285b373 | 5339 | symbol_free_list->function = Vdead; |
34400008 | 5340 | #endif |
d285b373 GM |
5341 | ++this_free; |
5342 | } | |
5343 | else | |
5344 | { | |
5345 | ++num_used; | |
5346 | if (!pure_p) | |
8fe5665d | 5347 | UNMARK_STRING (XSTRING (sym->xname)); |
2336fe58 | 5348 | sym->gcmarkbit = 0; |
d285b373 GM |
5349 | } |
5350 | } | |
177c0ea7 | 5351 | |
7146af97 | 5352 | lim = SYMBOL_BLOCK_SIZE; |
6ca94ac9 KH |
5353 | /* If this block contains only free symbols and we have already |
5354 | seen more than two blocks worth of free symbols then deallocate | |
5355 | this block. */ | |
6feef451 | 5356 | if (this_free == SYMBOL_BLOCK_SIZE && num_free > SYMBOL_BLOCK_SIZE) |
6ca94ac9 | 5357 | { |
6ca94ac9 KH |
5358 | *sprev = sblk->next; |
5359 | /* Unhook from the free list. */ | |
5360 | symbol_free_list = *(struct Lisp_Symbol **)&sblk->symbols[0].value; | |
c8099634 RS |
5361 | lisp_free (sblk); |
5362 | n_symbol_blocks--; | |
6ca94ac9 KH |
5363 | } |
5364 | else | |
6feef451 AS |
5365 | { |
5366 | num_free += this_free; | |
5367 | sprev = &sblk->next; | |
5368 | } | |
7146af97 JB |
5369 | } |
5370 | total_symbols = num_used; | |
5371 | total_free_symbols = num_free; | |
5372 | } | |
5373 | ||
a9faeabe RS |
5374 | /* Put all unmarked misc's on free list. |
5375 | For a marker, first unchain it from the buffer it points into. */ | |
7146af97 JB |
5376 | { |
5377 | register struct marker_block *mblk; | |
6ca94ac9 | 5378 | struct marker_block **mprev = &marker_block; |
7146af97 JB |
5379 | register int lim = marker_block_index; |
5380 | register int num_free = 0, num_used = 0; | |
5381 | ||
5382 | marker_free_list = 0; | |
177c0ea7 | 5383 | |
6ca94ac9 | 5384 | for (mblk = marker_block; mblk; mblk = *mprev) |
7146af97 JB |
5385 | { |
5386 | register int i; | |
6ca94ac9 | 5387 | int this_free = 0; |
fa05e253 | 5388 | |
7146af97 | 5389 | for (i = 0; i < lim; i++) |
465edf35 | 5390 | { |
2336fe58 | 5391 | if (!mblk->markers[i].u_marker.gcmarkbit) |
465edf35 | 5392 | { |
a5da44fe | 5393 | if (mblk->markers[i].u_marker.type == Lisp_Misc_Marker) |
ef89c2ce | 5394 | unchain_marker (&mblk->markers[i].u_marker); |
fa05e253 RS |
5395 | /* Set the type of the freed object to Lisp_Misc_Free. |
5396 | We could leave the type alone, since nobody checks it, | |
465edf35 | 5397 | but this might catch bugs faster. */ |
a5da44fe | 5398 | mblk->markers[i].u_marker.type = Lisp_Misc_Free; |
465edf35 KH |
5399 | mblk->markers[i].u_free.chain = marker_free_list; |
5400 | marker_free_list = &mblk->markers[i]; | |
6ca94ac9 | 5401 | this_free++; |
465edf35 KH |
5402 | } |
5403 | else | |
5404 | { | |
5405 | num_used++; | |
2336fe58 | 5406 | mblk->markers[i].u_marker.gcmarkbit = 0; |
465edf35 KH |
5407 | } |
5408 | } | |
7146af97 | 5409 | lim = MARKER_BLOCK_SIZE; |
6ca94ac9 KH |
5410 | /* If this block contains only free markers and we have already |
5411 | seen more than two blocks worth of free markers then deallocate | |
5412 | this block. */ | |
6feef451 | 5413 | if (this_free == MARKER_BLOCK_SIZE && num_free > MARKER_BLOCK_SIZE) |
6ca94ac9 | 5414 | { |
6ca94ac9 KH |
5415 | *mprev = mblk->next; |
5416 | /* Unhook from the free list. */ | |
5417 | marker_free_list = mblk->markers[0].u_free.chain; | |
c37adf23 | 5418 | lisp_free (mblk); |
c8099634 | 5419 | n_marker_blocks--; |
6ca94ac9 KH |
5420 | } |
5421 | else | |
6feef451 AS |
5422 | { |
5423 | num_free += this_free; | |
5424 | mprev = &mblk->next; | |
5425 | } | |
7146af97 JB |
5426 | } |
5427 | ||
5428 | total_markers = num_used; | |
5429 | total_free_markers = num_free; | |
5430 | } | |
5431 | ||
5432 | /* Free all unmarked buffers */ | |
5433 | { | |
5434 | register struct buffer *buffer = all_buffers, *prev = 0, *next; | |
5435 | ||
5436 | while (buffer) | |
3ef06d12 | 5437 | if (!VECTOR_MARKED_P (buffer)) |
7146af97 JB |
5438 | { |
5439 | if (prev) | |
5440 | prev->next = buffer->next; | |
5441 | else | |
5442 | all_buffers = buffer->next; | |
5443 | next = buffer->next; | |
34400008 | 5444 | lisp_free (buffer); |
7146af97 JB |
5445 | buffer = next; |
5446 | } | |
5447 | else | |
5448 | { | |
3ef06d12 | 5449 | VECTOR_UNMARK (buffer); |
30e3190a | 5450 | UNMARK_BALANCE_INTERVALS (BUF_INTERVALS (buffer)); |
7146af97 JB |
5451 | prev = buffer, buffer = buffer->next; |
5452 | } | |
5453 | } | |
5454 | ||
7146af97 JB |
5455 | /* Free all unmarked vectors */ |
5456 | { | |
5457 | register struct Lisp_Vector *vector = all_vectors, *prev = 0, *next; | |
5458 | total_vector_size = 0; | |
5459 | ||
5460 | while (vector) | |
3ef06d12 | 5461 | if (!VECTOR_MARKED_P (vector)) |
7146af97 JB |
5462 | { |
5463 | if (prev) | |
5464 | prev->next = vector->next; | |
5465 | else | |
5466 | all_vectors = vector->next; | |
5467 | next = vector->next; | |
c8099634 RS |
5468 | lisp_free (vector); |
5469 | n_vectors--; | |
7146af97 | 5470 | vector = next; |
41c28a37 | 5471 | |
7146af97 JB |
5472 | } |
5473 | else | |
5474 | { | |
3ef06d12 | 5475 | VECTOR_UNMARK (vector); |
fa05e253 RS |
5476 | if (vector->size & PSEUDOVECTOR_FLAG) |
5477 | total_vector_size += (PSEUDOVECTOR_SIZE_MASK & vector->size); | |
5478 | else | |
5479 | total_vector_size += vector->size; | |
7146af97 JB |
5480 | prev = vector, vector = vector->next; |
5481 | } | |
5482 | } | |
177c0ea7 | 5483 | |
676a7251 GM |
5484 | #ifdef GC_CHECK_STRING_BYTES |
5485 | if (!noninteractive) | |
5486 | check_string_bytes (1); | |
5487 | #endif | |
7146af97 | 5488 | } |
7146af97 | 5489 | |
7146af97 | 5490 | |
7146af97 | 5491 | |
7146af97 | 5492 | \f |
20d24714 JB |
5493 | /* Debugging aids. */ |
5494 | ||
31ce1c91 | 5495 | DEFUN ("memory-limit", Fmemory_limit, Smemory_limit, 0, 0, 0, |
a6266d23 | 5496 | doc: /* Return the address of the last byte Emacs has allocated, divided by 1024. |
228299fa | 5497 | This may be helpful in debugging Emacs's memory usage. |
7ee72033 MB |
5498 | We divide the value by 1024 to make sure it fits in a Lisp integer. */) |
5499 | () | |
20d24714 JB |
5500 | { |
5501 | Lisp_Object end; | |
5502 | ||
45d12a89 | 5503 | XSETINT (end, (EMACS_INT) sbrk (0) / 1024); |
20d24714 JB |
5504 | |
5505 | return end; | |
5506 | } | |
5507 | ||
310ea200 | 5508 | DEFUN ("memory-use-counts", Fmemory_use_counts, Smemory_use_counts, 0, 0, 0, |
a6266d23 | 5509 | doc: /* Return a list of counters that measure how much consing there has been. |
228299fa GM |
5510 | Each of these counters increments for a certain kind of object. |
5511 | The counters wrap around from the largest positive integer to zero. | |
5512 | Garbage collection does not decrease them. | |
5513 | The elements of the value are as follows: | |
5514 | (CONSES FLOATS VECTOR-CELLS SYMBOLS STRING-CHARS MISCS INTERVALS STRINGS) | |
5515 | All are in units of 1 = one object consed | |
5516 | except for VECTOR-CELLS and STRING-CHARS, which count the total length of | |
5517 | objects consed. | |
5518 | MISCS include overlays, markers, and some internal types. | |
5519 | Frames, windows, buffers, and subprocesses count as vectors | |
7ee72033 MB |
5520 | (but the contents of a buffer's text do not count here). */) |
5521 | () | |
310ea200 | 5522 | { |
2e471eb5 | 5523 | Lisp_Object consed[8]; |
310ea200 | 5524 | |
78e985eb GM |
5525 | consed[0] = make_number (min (MOST_POSITIVE_FIXNUM, cons_cells_consed)); |
5526 | consed[1] = make_number (min (MOST_POSITIVE_FIXNUM, floats_consed)); | |
5527 | consed[2] = make_number (min (MOST_POSITIVE_FIXNUM, vector_cells_consed)); | |
5528 | consed[3] = make_number (min (MOST_POSITIVE_FIXNUM, symbols_consed)); | |
5529 | consed[4] = make_number (min (MOST_POSITIVE_FIXNUM, string_chars_consed)); | |
5530 | consed[5] = make_number (min (MOST_POSITIVE_FIXNUM, misc_objects_consed)); | |
5531 | consed[6] = make_number (min (MOST_POSITIVE_FIXNUM, intervals_consed)); | |
5532 | consed[7] = make_number (min (MOST_POSITIVE_FIXNUM, strings_consed)); | |
310ea200 | 5533 | |
2e471eb5 | 5534 | return Flist (8, consed); |
310ea200 | 5535 | } |
e0b8c689 KR |
5536 | |
5537 | int suppress_checking; | |
5538 | void | |
5539 | die (msg, file, line) | |
5540 | const char *msg; | |
5541 | const char *file; | |
5542 | int line; | |
5543 | { | |
5544 | fprintf (stderr, "\r\nEmacs fatal error: %s:%d: %s\r\n", | |
5545 | file, line, msg); | |
5546 | abort (); | |
5547 | } | |
20d24714 | 5548 | \f |
7146af97 JB |
5549 | /* Initialization */ |
5550 | ||
dfcf069d | 5551 | void |
7146af97 JB |
5552 | init_alloc_once () |
5553 | { | |
5554 | /* Used to do Vpurify_flag = Qt here, but Qt isn't set up yet! */ | |
9e713715 GM |
5555 | purebeg = PUREBEG; |
5556 | pure_size = PURESIZE; | |
1f0b3fd2 | 5557 | pure_bytes_used = 0; |
9e713715 GM |
5558 | pure_bytes_used_before_overflow = 0; |
5559 | ||
ab6780cd SM |
5560 | /* Initialize the list of free aligned blocks. */ |
5561 | free_ablock = NULL; | |
5562 | ||
877935b1 | 5563 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
34400008 GM |
5564 | mem_init (); |
5565 | Vdead = make_pure_string ("DEAD", 4, 4, 0); | |
5566 | #endif | |
9e713715 | 5567 | |
7146af97 JB |
5568 | all_vectors = 0; |
5569 | ignore_warnings = 1; | |
d1658221 RS |
5570 | #ifdef DOUG_LEA_MALLOC |
5571 | mallopt (M_TRIM_THRESHOLD, 128*1024); /* trim threshold */ | |
5572 | mallopt (M_MMAP_THRESHOLD, 64*1024); /* mmap threshold */ | |
81d492d5 | 5573 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); /* max. number of mmap'ed areas */ |
d1658221 | 5574 | #endif |
7146af97 JB |
5575 | init_strings (); |
5576 | init_cons (); | |
5577 | init_symbol (); | |
5578 | init_marker (); | |
7146af97 | 5579 | init_float (); |
34400008 | 5580 | init_intervals (); |
d5e35230 | 5581 | |
276cbe5a RS |
5582 | #ifdef REL_ALLOC |
5583 | malloc_hysteresis = 32; | |
5584 | #else | |
5585 | malloc_hysteresis = 0; | |
5586 | #endif | |
5587 | ||
5588 | spare_memory = (char *) malloc (SPARE_MEMORY); | |
5589 | ||
7146af97 JB |
5590 | ignore_warnings = 0; |
5591 | gcprolist = 0; | |
630686c8 | 5592 | byte_stack_list = 0; |
7146af97 JB |
5593 | staticidx = 0; |
5594 | consing_since_gc = 0; | |
7d179cea | 5595 | gc_cons_threshold = 100000 * sizeof (Lisp_Object); |
7146af97 JB |
5596 | #ifdef VIRT_ADDR_VARIES |
5597 | malloc_sbrk_unused = 1<<22; /* A large number */ | |
5598 | malloc_sbrk_used = 100000; /* as reasonable as any number */ | |
5599 | #endif /* VIRT_ADDR_VARIES */ | |
5600 | } | |
5601 | ||
dfcf069d | 5602 | void |
7146af97 JB |
5603 | init_alloc () |
5604 | { | |
5605 | gcprolist = 0; | |
630686c8 | 5606 | byte_stack_list = 0; |
182ff242 GM |
5607 | #if GC_MARK_STACK |
5608 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
5609 | setjmp_tested_p = longjmps_done = 0; | |
5610 | #endif | |
5611 | #endif | |
2c5bd608 DL |
5612 | Vgc_elapsed = make_float (0.0); |
5613 | gcs_done = 0; | |
7146af97 JB |
5614 | } |
5615 | ||
5616 | void | |
5617 | syms_of_alloc () | |
5618 | { | |
7ee72033 | 5619 | DEFVAR_INT ("gc-cons-threshold", &gc_cons_threshold, |
a6266d23 | 5620 | doc: /* *Number of bytes of consing between garbage collections. |
228299fa GM |
5621 | Garbage collection can happen automatically once this many bytes have been |
5622 | allocated since the last garbage collection. All data types count. | |
7146af97 | 5623 | |
228299fa | 5624 | Garbage collection happens automatically only when `eval' is called. |
7146af97 | 5625 | |
228299fa GM |
5626 | By binding this temporarily to a large number, you can effectively |
5627 | prevent garbage collection during a part of the program. */); | |
0819585c | 5628 | |
7ee72033 | 5629 | DEFVAR_INT ("pure-bytes-used", &pure_bytes_used, |
a6266d23 | 5630 | doc: /* Number of bytes of sharable Lisp data allocated so far. */); |
0819585c | 5631 | |
7ee72033 | 5632 | DEFVAR_INT ("cons-cells-consed", &cons_cells_consed, |
a6266d23 | 5633 | doc: /* Number of cons cells that have been consed so far. */); |
0819585c | 5634 | |
7ee72033 | 5635 | DEFVAR_INT ("floats-consed", &floats_consed, |
a6266d23 | 5636 | doc: /* Number of floats that have been consed so far. */); |
0819585c | 5637 | |
7ee72033 | 5638 | DEFVAR_INT ("vector-cells-consed", &vector_cells_consed, |
a6266d23 | 5639 | doc: /* Number of vector cells that have been consed so far. */); |
0819585c | 5640 | |
7ee72033 | 5641 | DEFVAR_INT ("symbols-consed", &symbols_consed, |
a6266d23 | 5642 | doc: /* Number of symbols that have been consed so far. */); |
0819585c | 5643 | |
7ee72033 | 5644 | DEFVAR_INT ("string-chars-consed", &string_chars_consed, |
a6266d23 | 5645 | doc: /* Number of string characters that have been consed so far. */); |
0819585c | 5646 | |
7ee72033 | 5647 | DEFVAR_INT ("misc-objects-consed", &misc_objects_consed, |
a6266d23 | 5648 | doc: /* Number of miscellaneous objects that have been consed so far. */); |
2e471eb5 | 5649 | |
7ee72033 | 5650 | DEFVAR_INT ("intervals-consed", &intervals_consed, |
a6266d23 | 5651 | doc: /* Number of intervals that have been consed so far. */); |
7146af97 | 5652 | |
7ee72033 | 5653 | DEFVAR_INT ("strings-consed", &strings_consed, |
a6266d23 | 5654 | doc: /* Number of strings that have been consed so far. */); |
228299fa | 5655 | |
7ee72033 | 5656 | DEFVAR_LISP ("purify-flag", &Vpurify_flag, |
a6266d23 | 5657 | doc: /* Non-nil means loading Lisp code in order to dump an executable. |
228299fa GM |
5658 | This means that certain objects should be allocated in shared (pure) space. */); |
5659 | ||
7ee72033 | 5660 | DEFVAR_INT ("undo-limit", &undo_limit, |
a6266d23 | 5661 | doc: /* Keep no more undo information once it exceeds this size. |
228299fa GM |
5662 | This limit is applied when garbage collection happens. |
5663 | The size is counted as the number of bytes occupied, | |
5664 | which includes both saved text and other data. */); | |
502b9b64 | 5665 | undo_limit = 20000; |
7146af97 | 5666 | |
7ee72033 | 5667 | DEFVAR_INT ("undo-strong-limit", &undo_strong_limit, |
a6266d23 | 5668 | doc: /* Don't keep more than this much size of undo information. |
228299fa GM |
5669 | A command which pushes past this size is itself forgotten. |
5670 | This limit is applied when garbage collection happens. | |
5671 | The size is counted as the number of bytes occupied, | |
5672 | which includes both saved text and other data. */); | |
502b9b64 | 5673 | undo_strong_limit = 30000; |
7146af97 | 5674 | |
7ee72033 | 5675 | DEFVAR_BOOL ("garbage-collection-messages", &garbage_collection_messages, |
a6266d23 | 5676 | doc: /* Non-nil means display messages at start and end of garbage collection. */); |
299585ee RS |
5677 | garbage_collection_messages = 0; |
5678 | ||
7ee72033 | 5679 | DEFVAR_LISP ("post-gc-hook", &Vpost_gc_hook, |
a6266d23 | 5680 | doc: /* Hook run after garbage collection has finished. */); |
9e713715 GM |
5681 | Vpost_gc_hook = Qnil; |
5682 | Qpost_gc_hook = intern ("post-gc-hook"); | |
5683 | staticpro (&Qpost_gc_hook); | |
5684 | ||
74a54b04 RS |
5685 | DEFVAR_LISP ("memory-signal-data", &Vmemory_signal_data, |
5686 | doc: /* Precomputed `signal' argument for memory-full error. */); | |
bcb61d60 KH |
5687 | /* We build this in advance because if we wait until we need it, we might |
5688 | not be able to allocate the memory to hold it. */ | |
74a54b04 RS |
5689 | Vmemory_signal_data |
5690 | = list2 (Qerror, | |
5691 | build_string ("Memory exhausted--use M-x save-some-buffers then exit and restart Emacs")); | |
5692 | ||
5693 | DEFVAR_LISP ("memory-full", &Vmemory_full, | |
5694 | doc: /* Non-nil means we are handling a memory-full error. */); | |
5695 | Vmemory_full = Qnil; | |
bcb61d60 | 5696 | |
e8197642 RS |
5697 | staticpro (&Qgc_cons_threshold); |
5698 | Qgc_cons_threshold = intern ("gc-cons-threshold"); | |
5699 | ||
a59de17b RS |
5700 | staticpro (&Qchar_table_extra_slots); |
5701 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
5702 | ||
2c5bd608 DL |
5703 | DEFVAR_LISP ("gc-elapsed", &Vgc_elapsed, |
5704 | doc: /* Accumulated time elapsed in garbage collections. | |
e7415487 | 5705 | The time is in seconds as a floating point value. */); |
2c5bd608 | 5706 | DEFVAR_INT ("gcs-done", &gcs_done, |
e7415487 | 5707 | doc: /* Accumulated number of garbage collections done. */); |
2c5bd608 | 5708 | |
7146af97 JB |
5709 | defsubr (&Scons); |
5710 | defsubr (&Slist); | |
5711 | defsubr (&Svector); | |
5712 | defsubr (&Smake_byte_code); | |
5713 | defsubr (&Smake_list); | |
5714 | defsubr (&Smake_vector); | |
7b07587b | 5715 | defsubr (&Smake_char_table); |
7146af97 | 5716 | defsubr (&Smake_string); |
7b07587b | 5717 | defsubr (&Smake_bool_vector); |
7146af97 JB |
5718 | defsubr (&Smake_symbol); |
5719 | defsubr (&Smake_marker); | |
5720 | defsubr (&Spurecopy); | |
5721 | defsubr (&Sgarbage_collect); | |
20d24714 | 5722 | defsubr (&Smemory_limit); |
310ea200 | 5723 | defsubr (&Smemory_use_counts); |
34400008 GM |
5724 | |
5725 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
5726 | defsubr (&Sgc_status); | |
5727 | #endif | |
7146af97 | 5728 | } |
ab5796a9 MB |
5729 | |
5730 | /* arch-tag: 6695ca10-e3c5-4c2c-8bc3-ed26a7dda857 | |
5731 | (do not change this comment) */ |