Commit | Line | Data |
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7146af97 | 1 | /* Storage allocation and gc for GNU Emacs Lisp interpreter. |
126f9c02 SM |
2 | Copyright (C) 1985, 1986, 1988, 1993, 1994, 1995, 1997, 1998, 1999, |
3 | 2000, 2001, 2002, 2003, 2004 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 | |
aa477689 JD |
34 | #ifdef HAVE_GTK_AND_PTHREAD |
35 | #include <pthread.h> | |
36 | #endif | |
37 | ||
7539e11f KR |
38 | /* This file is part of the core Lisp implementation, and thus must |
39 | deal with the real data structures. If the Lisp implementation is | |
40 | replaced, this file likely will not be used. */ | |
2e471eb5 | 41 | |
7539e11f | 42 | #undef HIDE_LISP_IMPLEMENTATION |
7146af97 | 43 | #include "lisp.h" |
ece93c02 | 44 | #include "process.h" |
d5e35230 | 45 | #include "intervals.h" |
4c0be5f4 | 46 | #include "puresize.h" |
7146af97 JB |
47 | #include "buffer.h" |
48 | #include "window.h" | |
2538fae4 | 49 | #include "keyboard.h" |
502b9b64 | 50 | #include "frame.h" |
9ac0d9e0 | 51 | #include "blockinput.h" |
e54daa22 | 52 | #include "charset.h" |
e065a56e | 53 | #include "syssignal.h" |
34400008 | 54 | #include <setjmp.h> |
e065a56e | 55 | |
ad5f3636 DL |
56 | /* GC_MALLOC_CHECK defined means perform validity checks of malloc'd |
57 | memory. Can do this only if using gmalloc.c. */ | |
58 | ||
59 | #if defined SYSTEM_MALLOC || defined DOUG_LEA_MALLOC | |
60 | #undef GC_MALLOC_CHECK | |
61 | #endif | |
62 | ||
bf952fb6 DL |
63 | #ifdef HAVE_UNISTD_H |
64 | #include <unistd.h> | |
65 | #else | |
66 | extern POINTER_TYPE *sbrk (); | |
67 | #endif | |
ee1eea5c | 68 | |
d1658221 | 69 | #ifdef DOUG_LEA_MALLOC |
2e471eb5 | 70 | |
d1658221 | 71 | #include <malloc.h> |
3e60b029 DL |
72 | /* malloc.h #defines this as size_t, at least in glibc2. */ |
73 | #ifndef __malloc_size_t | |
d1658221 | 74 | #define __malloc_size_t int |
3e60b029 | 75 | #endif |
81d492d5 | 76 | |
2e471eb5 GM |
77 | /* Specify maximum number of areas to mmap. It would be nice to use a |
78 | value that explicitly means "no limit". */ | |
79 | ||
81d492d5 RS |
80 | #define MMAP_MAX_AREAS 100000000 |
81 | ||
2e471eb5 GM |
82 | #else /* not DOUG_LEA_MALLOC */ |
83 | ||
276cbe5a RS |
84 | /* The following come from gmalloc.c. */ |
85 | ||
276cbe5a | 86 | #define __malloc_size_t size_t |
276cbe5a | 87 | extern __malloc_size_t _bytes_used; |
3e60b029 | 88 | extern __malloc_size_t __malloc_extra_blocks; |
2e471eb5 GM |
89 | |
90 | #endif /* not DOUG_LEA_MALLOC */ | |
276cbe5a | 91 | |
aa477689 JD |
92 | #if ! defined (SYSTEM_MALLOC) && defined (HAVE_GTK_AND_PTHREAD) |
93 | ||
f415cacd JD |
94 | /* When GTK uses the file chooser dialog, different backends can be loaded |
95 | dynamically. One such a backend is the Gnome VFS backend that gets loaded | |
96 | if you run Gnome. That backend creates several threads and also allocates | |
97 | memory with malloc. | |
98 | ||
99 | If Emacs sets malloc hooks (! SYSTEM_MALLOC) and the emacs_blocked_* | |
100 | functions below are called from malloc, there is a chance that one | |
101 | of these threads preempts the Emacs main thread and the hook variables | |
333f1b6f | 102 | end up in an inconsistent state. So we have a mutex to prevent that (note |
f415cacd JD |
103 | that the backend handles concurrent access to malloc within its own threads |
104 | but Emacs code running in the main thread is not included in that control). | |
105 | ||
026cdede | 106 | When UNBLOCK_INPUT is called, reinvoke_input_signal may be called. If this |
f415cacd JD |
107 | happens in one of the backend threads we will have two threads that tries |
108 | to run Emacs code at once, and the code is not prepared for that. | |
109 | To prevent that, we only call BLOCK/UNBLOCK from the main thread. */ | |
110 | ||
aa477689 | 111 | static pthread_mutex_t alloc_mutex; |
aa477689 JD |
112 | |
113 | #define BLOCK_INPUT_ALLOC \ | |
114 | do \ | |
115 | { \ | |
116 | pthread_mutex_lock (&alloc_mutex); \ | |
117 | if (pthread_self () == main_thread) \ | |
118 | BLOCK_INPUT; \ | |
119 | } \ | |
120 | while (0) | |
121 | #define UNBLOCK_INPUT_ALLOC \ | |
122 | do \ | |
123 | { \ | |
124 | if (pthread_self () == main_thread) \ | |
125 | UNBLOCK_INPUT; \ | |
126 | pthread_mutex_unlock (&alloc_mutex); \ | |
127 | } \ | |
128 | while (0) | |
129 | ||
130 | #else /* SYSTEM_MALLOC || not HAVE_GTK_AND_PTHREAD */ | |
131 | ||
132 | #define BLOCK_INPUT_ALLOC BLOCK_INPUT | |
133 | #define UNBLOCK_INPUT_ALLOC UNBLOCK_INPUT | |
134 | ||
135 | #endif /* SYSTEM_MALLOC || not HAVE_GTK_AND_PTHREAD */ | |
136 | ||
276cbe5a | 137 | /* Value of _bytes_used, when spare_memory was freed. */ |
2e471eb5 | 138 | |
276cbe5a RS |
139 | static __malloc_size_t bytes_used_when_full; |
140 | ||
2e471eb5 GM |
141 | /* Mark, unmark, query mark bit of a Lisp string. S must be a pointer |
142 | to a struct Lisp_String. */ | |
143 | ||
7cdee936 SM |
144 | #define MARK_STRING(S) ((S)->size |= ARRAY_MARK_FLAG) |
145 | #define UNMARK_STRING(S) ((S)->size &= ~ARRAY_MARK_FLAG) | |
b059de99 | 146 | #define STRING_MARKED_P(S) (((S)->size & ARRAY_MARK_FLAG) != 0) |
2e471eb5 | 147 | |
3ef06d12 SM |
148 | #define VECTOR_MARK(V) ((V)->size |= ARRAY_MARK_FLAG) |
149 | #define VECTOR_UNMARK(V) ((V)->size &= ~ARRAY_MARK_FLAG) | |
b059de99 | 150 | #define VECTOR_MARKED_P(V) (((V)->size & ARRAY_MARK_FLAG) != 0) |
3ef06d12 | 151 | |
2e471eb5 GM |
152 | /* Value is the number of bytes/chars of S, a pointer to a struct |
153 | Lisp_String. This must be used instead of STRING_BYTES (S) or | |
154 | S->size during GC, because S->size contains the mark bit for | |
155 | strings. */ | |
156 | ||
3ef06d12 | 157 | #define GC_STRING_BYTES(S) (STRING_BYTES (S)) |
7cdee936 | 158 | #define GC_STRING_CHARS(S) ((S)->size & ~ARRAY_MARK_FLAG) |
2e471eb5 GM |
159 | |
160 | /* Number of bytes of consing done since the last gc. */ | |
161 | ||
7146af97 JB |
162 | int consing_since_gc; |
163 | ||
310ea200 | 164 | /* Count the amount of consing of various sorts of space. */ |
2e471eb5 | 165 | |
31ade731 SM |
166 | EMACS_INT cons_cells_consed; |
167 | EMACS_INT floats_consed; | |
168 | EMACS_INT vector_cells_consed; | |
169 | EMACS_INT symbols_consed; | |
170 | EMACS_INT string_chars_consed; | |
171 | EMACS_INT misc_objects_consed; | |
172 | EMACS_INT intervals_consed; | |
173 | EMACS_INT strings_consed; | |
2e471eb5 GM |
174 | |
175 | /* Number of bytes of consing since GC before another GC should be done. */ | |
310ea200 | 176 | |
31ade731 | 177 | EMACS_INT gc_cons_threshold; |
7146af97 | 178 | |
2e471eb5 GM |
179 | /* Nonzero during GC. */ |
180 | ||
7146af97 JB |
181 | int gc_in_progress; |
182 | ||
3de0effb RS |
183 | /* Nonzero means abort if try to GC. |
184 | This is for code which is written on the assumption that | |
185 | no GC will happen, so as to verify that assumption. */ | |
186 | ||
187 | int abort_on_gc; | |
188 | ||
299585ee | 189 | /* Nonzero means display messages at beginning and end of GC. */ |
2e471eb5 | 190 | |
299585ee RS |
191 | int garbage_collection_messages; |
192 | ||
7146af97 JB |
193 | #ifndef VIRT_ADDR_VARIES |
194 | extern | |
195 | #endif /* VIRT_ADDR_VARIES */ | |
2e471eb5 | 196 | int malloc_sbrk_used; |
7146af97 JB |
197 | |
198 | #ifndef VIRT_ADDR_VARIES | |
199 | extern | |
200 | #endif /* VIRT_ADDR_VARIES */ | |
2e471eb5 | 201 | int malloc_sbrk_unused; |
7146af97 | 202 | |
34400008 GM |
203 | /* Number of live and free conses etc. */ |
204 | ||
205 | static int total_conses, total_markers, total_symbols, total_vector_size; | |
206 | static int total_free_conses, total_free_markers, total_free_symbols; | |
207 | static int total_free_floats, total_floats; | |
fd27a537 | 208 | |
2e471eb5 GM |
209 | /* Points to memory space allocated as "spare", to be freed if we run |
210 | out of memory. */ | |
211 | ||
276cbe5a RS |
212 | static char *spare_memory; |
213 | ||
214 | /* Amount of spare memory to keep in reserve. */ | |
2e471eb5 | 215 | |
276cbe5a RS |
216 | #define SPARE_MEMORY (1 << 14) |
217 | ||
218 | /* Number of extra blocks malloc should get when it needs more core. */ | |
2e471eb5 | 219 | |
276cbe5a RS |
220 | static int malloc_hysteresis; |
221 | ||
2e471eb5 GM |
222 | /* Non-nil means defun should do purecopy on the function definition. */ |
223 | ||
7146af97 JB |
224 | Lisp_Object Vpurify_flag; |
225 | ||
74a54b04 RS |
226 | /* Non-nil means we are handling a memory-full error. */ |
227 | ||
228 | Lisp_Object Vmemory_full; | |
229 | ||
7146af97 | 230 | #ifndef HAVE_SHM |
2e471eb5 | 231 | |
1b8950e5 RS |
232 | /* Initialize it to a nonzero value to force it into data space |
233 | (rather than bss space). That way unexec will remap it into text | |
234 | space (pure), on some systems. We have not implemented the | |
235 | remapping on more recent systems because this is less important | |
236 | nowadays than in the days of small memories and timesharing. */ | |
2e471eb5 | 237 | |
379b98b1 | 238 | EMACS_INT pure[PURESIZE / sizeof (EMACS_INT)] = {1,}; |
7146af97 | 239 | #define PUREBEG (char *) pure |
2e471eb5 | 240 | |
9e713715 | 241 | #else /* HAVE_SHM */ |
2e471eb5 | 242 | |
7146af97 JB |
243 | #define pure PURE_SEG_BITS /* Use shared memory segment */ |
244 | #define PUREBEG (char *)PURE_SEG_BITS | |
4c0be5f4 | 245 | |
9e713715 | 246 | #endif /* HAVE_SHM */ |
2e471eb5 | 247 | |
9e713715 | 248 | /* Pointer to the pure area, and its size. */ |
2e471eb5 | 249 | |
9e713715 GM |
250 | static char *purebeg; |
251 | static size_t pure_size; | |
252 | ||
253 | /* Number of bytes of pure storage used before pure storage overflowed. | |
254 | If this is non-zero, this implies that an overflow occurred. */ | |
255 | ||
256 | static size_t pure_bytes_used_before_overflow; | |
7146af97 | 257 | |
34400008 GM |
258 | /* Value is non-zero if P points into pure space. */ |
259 | ||
260 | #define PURE_POINTER_P(P) \ | |
261 | (((PNTR_COMPARISON_TYPE) (P) \ | |
9e713715 | 262 | < (PNTR_COMPARISON_TYPE) ((char *) purebeg + pure_size)) \ |
34400008 | 263 | && ((PNTR_COMPARISON_TYPE) (P) \ |
9e713715 | 264 | >= (PNTR_COMPARISON_TYPE) purebeg)) |
34400008 | 265 | |
2e471eb5 GM |
266 | /* Index in pure at which next pure object will be allocated.. */ |
267 | ||
31ade731 | 268 | EMACS_INT pure_bytes_used; |
7146af97 | 269 | |
2e471eb5 GM |
270 | /* If nonzero, this is a warning delivered by malloc and not yet |
271 | displayed. */ | |
272 | ||
7146af97 JB |
273 | char *pending_malloc_warning; |
274 | ||
bcb61d60 | 275 | /* Pre-computed signal argument for use when memory is exhausted. */ |
2e471eb5 | 276 | |
74a54b04 | 277 | Lisp_Object Vmemory_signal_data; |
bcb61d60 | 278 | |
7146af97 JB |
279 | /* Maximum amount of C stack to save when a GC happens. */ |
280 | ||
281 | #ifndef MAX_SAVE_STACK | |
282 | #define MAX_SAVE_STACK 16000 | |
283 | #endif | |
284 | ||
285 | /* Buffer in which we save a copy of the C stack at each GC. */ | |
286 | ||
287 | char *stack_copy; | |
288 | int stack_copy_size; | |
289 | ||
2e471eb5 GM |
290 | /* Non-zero means ignore malloc warnings. Set during initialization. |
291 | Currently not used. */ | |
292 | ||
7146af97 | 293 | int ignore_warnings; |
350273a4 | 294 | |
a59de17b | 295 | Lisp_Object Qgc_cons_threshold, Qchar_table_extra_slots; |
e8197642 | 296 | |
9e713715 GM |
297 | /* Hook run after GC has finished. */ |
298 | ||
299 | Lisp_Object Vpost_gc_hook, Qpost_gc_hook; | |
300 | ||
2c5bd608 DL |
301 | Lisp_Object Vgc_elapsed; /* accumulated elapsed time in GC */ |
302 | EMACS_INT gcs_done; /* accumulated GCs */ | |
303 | ||
2e471eb5 | 304 | static void mark_buffer P_ ((Lisp_Object)); |
6793bc63 | 305 | extern void mark_kboards P_ ((void)); |
b40ea20a | 306 | extern void mark_backtrace P_ ((void)); |
2e471eb5 | 307 | static void gc_sweep P_ ((void)); |
41c28a37 GM |
308 | static void mark_glyph_matrix P_ ((struct glyph_matrix *)); |
309 | static void mark_face_cache P_ ((struct face_cache *)); | |
310 | ||
311 | #ifdef HAVE_WINDOW_SYSTEM | |
454d7973 | 312 | extern void mark_fringe_data P_ ((void)); |
41c28a37 GM |
313 | static void mark_image P_ ((struct image *)); |
314 | static void mark_image_cache P_ ((struct frame *)); | |
315 | #endif /* HAVE_WINDOW_SYSTEM */ | |
316 | ||
2e471eb5 GM |
317 | static struct Lisp_String *allocate_string P_ ((void)); |
318 | static void compact_small_strings P_ ((void)); | |
319 | static void free_large_strings P_ ((void)); | |
320 | static void sweep_strings P_ ((void)); | |
7da0b0d3 RS |
321 | |
322 | extern int message_enable_multibyte; | |
34400008 | 323 | |
34400008 GM |
324 | /* When scanning the C stack for live Lisp objects, Emacs keeps track |
325 | of what memory allocated via lisp_malloc is intended for what | |
326 | purpose. This enumeration specifies the type of memory. */ | |
327 | ||
328 | enum mem_type | |
329 | { | |
330 | MEM_TYPE_NON_LISP, | |
331 | MEM_TYPE_BUFFER, | |
332 | MEM_TYPE_CONS, | |
333 | MEM_TYPE_STRING, | |
334 | MEM_TYPE_MISC, | |
335 | MEM_TYPE_SYMBOL, | |
336 | MEM_TYPE_FLOAT, | |
ece93c02 GM |
337 | /* Keep the following vector-like types together, with |
338 | MEM_TYPE_WINDOW being the last, and MEM_TYPE_VECTOR the | |
339 | first. Or change the code of live_vector_p, for instance. */ | |
340 | MEM_TYPE_VECTOR, | |
341 | MEM_TYPE_PROCESS, | |
342 | MEM_TYPE_HASH_TABLE, | |
343 | MEM_TYPE_FRAME, | |
344 | MEM_TYPE_WINDOW | |
34400008 GM |
345 | }; |
346 | ||
877935b1 | 347 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
0b378936 GM |
348 | |
349 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
350 | #include <stdio.h> /* For fprintf. */ | |
351 | #endif | |
352 | ||
353 | /* A unique object in pure space used to make some Lisp objects | |
354 | on free lists recognizable in O(1). */ | |
355 | ||
356 | Lisp_Object Vdead; | |
357 | ||
877935b1 GM |
358 | #ifdef GC_MALLOC_CHECK |
359 | ||
360 | enum mem_type allocated_mem_type; | |
361 | int dont_register_blocks; | |
362 | ||
363 | #endif /* GC_MALLOC_CHECK */ | |
364 | ||
365 | /* A node in the red-black tree describing allocated memory containing | |
366 | Lisp data. Each such block is recorded with its start and end | |
367 | address when it is allocated, and removed from the tree when it | |
368 | is freed. | |
369 | ||
370 | A red-black tree is a balanced binary tree with the following | |
371 | properties: | |
372 | ||
373 | 1. Every node is either red or black. | |
374 | 2. Every leaf is black. | |
375 | 3. If a node is red, then both of its children are black. | |
376 | 4. Every simple path from a node to a descendant leaf contains | |
377 | the same number of black nodes. | |
378 | 5. The root is always black. | |
379 | ||
380 | When nodes are inserted into the tree, or deleted from the tree, | |
381 | the tree is "fixed" so that these properties are always true. | |
382 | ||
383 | A red-black tree with N internal nodes has height at most 2 | |
384 | log(N+1). Searches, insertions and deletions are done in O(log N). | |
385 | Please see a text book about data structures for a detailed | |
386 | description of red-black trees. Any book worth its salt should | |
387 | describe them. */ | |
388 | ||
389 | struct mem_node | |
390 | { | |
9f7d9210 RS |
391 | /* Children of this node. These pointers are never NULL. When there |
392 | is no child, the value is MEM_NIL, which points to a dummy node. */ | |
393 | struct mem_node *left, *right; | |
394 | ||
395 | /* The parent of this node. In the root node, this is NULL. */ | |
396 | struct mem_node *parent; | |
877935b1 GM |
397 | |
398 | /* Start and end of allocated region. */ | |
399 | void *start, *end; | |
400 | ||
401 | /* Node color. */ | |
402 | enum {MEM_BLACK, MEM_RED} color; | |
177c0ea7 | 403 | |
877935b1 GM |
404 | /* Memory type. */ |
405 | enum mem_type type; | |
406 | }; | |
407 | ||
408 | /* Base address of stack. Set in main. */ | |
409 | ||
410 | Lisp_Object *stack_base; | |
411 | ||
412 | /* Root of the tree describing allocated Lisp memory. */ | |
413 | ||
414 | static struct mem_node *mem_root; | |
415 | ||
ece93c02 GM |
416 | /* Lowest and highest known address in the heap. */ |
417 | ||
418 | static void *min_heap_address, *max_heap_address; | |
419 | ||
877935b1 GM |
420 | /* Sentinel node of the tree. */ |
421 | ||
422 | static struct mem_node mem_z; | |
423 | #define MEM_NIL &mem_z | |
424 | ||
b3303f74 | 425 | static POINTER_TYPE *lisp_malloc P_ ((size_t, enum mem_type)); |
ece93c02 | 426 | static struct Lisp_Vector *allocate_vectorlike P_ ((EMACS_INT, enum mem_type)); |
bf952fb6 | 427 | static void lisp_free P_ ((POINTER_TYPE *)); |
34400008 | 428 | static void mark_stack P_ ((void)); |
34400008 GM |
429 | static int live_vector_p P_ ((struct mem_node *, void *)); |
430 | static int live_buffer_p P_ ((struct mem_node *, void *)); | |
431 | static int live_string_p P_ ((struct mem_node *, void *)); | |
432 | static int live_cons_p P_ ((struct mem_node *, void *)); | |
433 | static int live_symbol_p P_ ((struct mem_node *, void *)); | |
434 | static int live_float_p P_ ((struct mem_node *, void *)); | |
435 | static int live_misc_p P_ ((struct mem_node *, void *)); | |
182ff242 | 436 | static void mark_maybe_object P_ ((Lisp_Object)); |
34400008 GM |
437 | static void mark_memory P_ ((void *, void *)); |
438 | static void mem_init P_ ((void)); | |
439 | static struct mem_node *mem_insert P_ ((void *, void *, enum mem_type)); | |
440 | static void mem_insert_fixup P_ ((struct mem_node *)); | |
441 | static void mem_rotate_left P_ ((struct mem_node *)); | |
442 | static void mem_rotate_right P_ ((struct mem_node *)); | |
443 | static void mem_delete P_ ((struct mem_node *)); | |
444 | static void mem_delete_fixup P_ ((struct mem_node *)); | |
445 | static INLINE struct mem_node *mem_find P_ ((void *)); | |
446 | ||
447 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
448 | static void check_gcpros P_ ((void)); | |
449 | #endif | |
450 | ||
877935b1 | 451 | #endif /* GC_MARK_STACK || GC_MALLOC_CHECK */ |
34400008 | 452 | |
1f0b3fd2 GM |
453 | /* Recording what needs to be marked for gc. */ |
454 | ||
455 | struct gcpro *gcprolist; | |
456 | ||
379b98b1 PE |
457 | /* Addresses of staticpro'd variables. Initialize it to a nonzero |
458 | value; otherwise some compilers put it into BSS. */ | |
1f0b3fd2 | 459 | |
382d38fa | 460 | #define NSTATICS 1280 |
379b98b1 | 461 | Lisp_Object *staticvec[NSTATICS] = {&Vpurify_flag}; |
1f0b3fd2 GM |
462 | |
463 | /* Index of next unused slot in staticvec. */ | |
464 | ||
465 | int staticidx = 0; | |
466 | ||
467 | static POINTER_TYPE *pure_alloc P_ ((size_t, int)); | |
468 | ||
469 | ||
470 | /* Value is SZ rounded up to the next multiple of ALIGNMENT. | |
471 | ALIGNMENT must be a power of 2. */ | |
472 | ||
ab6780cd SM |
473 | #define ALIGN(ptr, ALIGNMENT) \ |
474 | ((POINTER_TYPE *) ((((EMACS_UINT)(ptr)) + (ALIGNMENT) - 1) \ | |
475 | & ~((ALIGNMENT) - 1))) | |
1f0b3fd2 | 476 | |
ece93c02 | 477 | |
7146af97 | 478 | \f |
34400008 GM |
479 | /************************************************************************ |
480 | Malloc | |
481 | ************************************************************************/ | |
482 | ||
4455ad75 | 483 | /* Function malloc calls this if it finds we are near exhausting storage. */ |
d457598b AS |
484 | |
485 | void | |
7146af97 JB |
486 | malloc_warning (str) |
487 | char *str; | |
488 | { | |
489 | pending_malloc_warning = str; | |
490 | } | |
491 | ||
34400008 | 492 | |
4455ad75 | 493 | /* Display an already-pending malloc warning. */ |
34400008 | 494 | |
d457598b | 495 | void |
7146af97 JB |
496 | display_malloc_warning () |
497 | { | |
4455ad75 RS |
498 | call3 (intern ("display-warning"), |
499 | intern ("alloc"), | |
500 | build_string (pending_malloc_warning), | |
501 | intern ("emergency")); | |
7146af97 | 502 | pending_malloc_warning = 0; |
7146af97 JB |
503 | } |
504 | ||
34400008 | 505 | |
d1658221 | 506 | #ifdef DOUG_LEA_MALLOC |
1177ecf6 | 507 | # define BYTES_USED (mallinfo ().arena) |
d1658221 | 508 | #else |
1177ecf6 | 509 | # define BYTES_USED _bytes_used |
d1658221 RS |
510 | #endif |
511 | ||
34400008 | 512 | |
2e471eb5 | 513 | /* Called if malloc returns zero. */ |
276cbe5a | 514 | |
d457598b | 515 | void |
7146af97 JB |
516 | memory_full () |
517 | { | |
74a54b04 RS |
518 | Vmemory_full = Qt; |
519 | ||
276cbe5a | 520 | #ifndef SYSTEM_MALLOC |
d1658221 | 521 | bytes_used_when_full = BYTES_USED; |
276cbe5a RS |
522 | #endif |
523 | ||
524 | /* The first time we get here, free the spare memory. */ | |
525 | if (spare_memory) | |
526 | { | |
527 | free (spare_memory); | |
528 | spare_memory = 0; | |
529 | } | |
530 | ||
2e471eb5 GM |
531 | /* This used to call error, but if we've run out of memory, we could |
532 | get infinite recursion trying to build the string. */ | |
276cbe5a | 533 | while (1) |
74a54b04 | 534 | Fsignal (Qnil, Vmemory_signal_data); |
276cbe5a RS |
535 | } |
536 | ||
34400008 | 537 | |
276cbe5a RS |
538 | /* Called if we can't allocate relocatable space for a buffer. */ |
539 | ||
540 | void | |
541 | buffer_memory_full () | |
542 | { | |
2e471eb5 GM |
543 | /* If buffers use the relocating allocator, no need to free |
544 | spare_memory, because we may have plenty of malloc space left | |
545 | that we could get, and if we don't, the malloc that fails will | |
546 | itself cause spare_memory to be freed. If buffers don't use the | |
547 | relocating allocator, treat this like any other failing | |
548 | malloc. */ | |
276cbe5a RS |
549 | |
550 | #ifndef REL_ALLOC | |
551 | memory_full (); | |
552 | #endif | |
553 | ||
74a54b04 RS |
554 | Vmemory_full = Qt; |
555 | ||
2e471eb5 GM |
556 | /* This used to call error, but if we've run out of memory, we could |
557 | get infinite recursion trying to build the string. */ | |
bcb61d60 | 558 | while (1) |
74a54b04 | 559 | Fsignal (Qnil, Vmemory_signal_data); |
7146af97 JB |
560 | } |
561 | ||
34400008 | 562 | |
212f33f1 KS |
563 | #ifdef XMALLOC_OVERRUN_CHECK |
564 | ||
bdbed949 KS |
565 | /* Check for overrun in malloc'ed buffers by wrapping a 16 byte header |
566 | and a 16 byte trailer around each block. | |
567 | ||
568 | The header consists of 12 fixed bytes + a 4 byte integer contaning the | |
569 | original block size, while the trailer consists of 16 fixed bytes. | |
570 | ||
571 | The header is used to detect whether this block has been allocated | |
572 | through these functions -- as it seems that some low-level libc | |
573 | functions may bypass the malloc hooks. | |
574 | */ | |
575 | ||
576 | ||
212f33f1 | 577 | #define XMALLOC_OVERRUN_CHECK_SIZE 16 |
bdbed949 | 578 | |
212f33f1 KS |
579 | static char xmalloc_overrun_check_header[XMALLOC_OVERRUN_CHECK_SIZE-4] = |
580 | { 0x9a, 0x9b, 0xae, 0xaf, | |
581 | 0xbf, 0xbe, 0xce, 0xcf, | |
582 | 0xea, 0xeb, 0xec, 0xed }; | |
583 | ||
584 | static char xmalloc_overrun_check_trailer[XMALLOC_OVERRUN_CHECK_SIZE] = | |
585 | { 0xaa, 0xab, 0xac, 0xad, | |
586 | 0xba, 0xbb, 0xbc, 0xbd, | |
587 | 0xca, 0xcb, 0xcc, 0xcd, | |
588 | 0xda, 0xdb, 0xdc, 0xdd }; | |
589 | ||
bdbed949 KS |
590 | /* Macros to insert and extract the block size in the header. */ |
591 | ||
592 | #define XMALLOC_PUT_SIZE(ptr, size) \ | |
593 | (ptr[-1] = (size & 0xff), \ | |
594 | ptr[-2] = ((size >> 8) & 0xff), \ | |
595 | ptr[-3] = ((size >> 16) & 0xff), \ | |
596 | ptr[-4] = ((size >> 24) & 0xff)) | |
597 | ||
598 | #define XMALLOC_GET_SIZE(ptr) \ | |
599 | (size_t)((unsigned)(ptr[-1]) | \ | |
600 | ((unsigned)(ptr[-2]) << 8) | \ | |
601 | ((unsigned)(ptr[-3]) << 16) | \ | |
602 | ((unsigned)(ptr[-4]) << 24)) | |
603 | ||
604 | ||
d8f165a8 JD |
605 | /* The call depth in overrun_check functions. For example, this might happen: |
606 | xmalloc() | |
607 | overrun_check_malloc() | |
608 | -> malloc -> (via hook)_-> emacs_blocked_malloc | |
609 | -> overrun_check_malloc | |
610 | call malloc (hooks are NULL, so real malloc is called). | |
611 | malloc returns 10000. | |
612 | add overhead, return 10016. | |
613 | <- (back in overrun_check_malloc) | |
857ae68b | 614 | add overhead again, return 10032 |
d8f165a8 | 615 | xmalloc returns 10032. |
857ae68b JD |
616 | |
617 | (time passes). | |
618 | ||
d8f165a8 JD |
619 | xfree(10032) |
620 | overrun_check_free(10032) | |
621 | decrease overhed | |
622 | free(10016) <- crash, because 10000 is the original pointer. */ | |
857ae68b JD |
623 | |
624 | static int check_depth; | |
625 | ||
bdbed949 KS |
626 | /* Like malloc, but wraps allocated block with header and trailer. */ |
627 | ||
212f33f1 KS |
628 | POINTER_TYPE * |
629 | overrun_check_malloc (size) | |
630 | size_t size; | |
631 | { | |
bdbed949 | 632 | register unsigned char *val; |
857ae68b | 633 | size_t overhead = ++check_depth == 1 ? XMALLOC_OVERRUN_CHECK_SIZE*2 : 0; |
212f33f1 | 634 | |
857ae68b JD |
635 | val = (unsigned char *) malloc (size + overhead); |
636 | if (val && check_depth == 1) | |
212f33f1 KS |
637 | { |
638 | bcopy (xmalloc_overrun_check_header, val, XMALLOC_OVERRUN_CHECK_SIZE - 4); | |
212f33f1 | 639 | val += XMALLOC_OVERRUN_CHECK_SIZE; |
bdbed949 | 640 | XMALLOC_PUT_SIZE(val, size); |
212f33f1 KS |
641 | bcopy (xmalloc_overrun_check_trailer, val + size, XMALLOC_OVERRUN_CHECK_SIZE); |
642 | } | |
857ae68b | 643 | --check_depth; |
212f33f1 KS |
644 | return (POINTER_TYPE *)val; |
645 | } | |
646 | ||
bdbed949 KS |
647 | |
648 | /* Like realloc, but checks old block for overrun, and wraps new block | |
649 | with header and trailer. */ | |
650 | ||
212f33f1 KS |
651 | POINTER_TYPE * |
652 | overrun_check_realloc (block, size) | |
653 | POINTER_TYPE *block; | |
654 | size_t size; | |
655 | { | |
bdbed949 | 656 | register unsigned char *val = (unsigned char *)block; |
857ae68b | 657 | size_t overhead = ++check_depth == 1 ? XMALLOC_OVERRUN_CHECK_SIZE*2 : 0; |
212f33f1 KS |
658 | |
659 | if (val | |
857ae68b | 660 | && check_depth == 1 |
212f33f1 KS |
661 | && bcmp (xmalloc_overrun_check_header, |
662 | val - XMALLOC_OVERRUN_CHECK_SIZE, | |
663 | XMALLOC_OVERRUN_CHECK_SIZE - 4) == 0) | |
664 | { | |
bdbed949 | 665 | size_t osize = XMALLOC_GET_SIZE (val); |
212f33f1 KS |
666 | if (bcmp (xmalloc_overrun_check_trailer, |
667 | val + osize, | |
668 | XMALLOC_OVERRUN_CHECK_SIZE)) | |
669 | abort (); | |
bdbed949 | 670 | bzero (val + osize, XMALLOC_OVERRUN_CHECK_SIZE); |
212f33f1 | 671 | val -= XMALLOC_OVERRUN_CHECK_SIZE; |
bdbed949 | 672 | bzero (val, XMALLOC_OVERRUN_CHECK_SIZE); |
212f33f1 KS |
673 | } |
674 | ||
857ae68b | 675 | val = (unsigned char *) realloc ((POINTER_TYPE *)val, size + overhead); |
212f33f1 | 676 | |
857ae68b | 677 | if (val && check_depth == 1) |
212f33f1 KS |
678 | { |
679 | bcopy (xmalloc_overrun_check_header, val, XMALLOC_OVERRUN_CHECK_SIZE - 4); | |
212f33f1 | 680 | val += XMALLOC_OVERRUN_CHECK_SIZE; |
bdbed949 | 681 | XMALLOC_PUT_SIZE(val, size); |
212f33f1 KS |
682 | bcopy (xmalloc_overrun_check_trailer, val + size, XMALLOC_OVERRUN_CHECK_SIZE); |
683 | } | |
857ae68b | 684 | --check_depth; |
212f33f1 KS |
685 | return (POINTER_TYPE *)val; |
686 | } | |
687 | ||
bdbed949 KS |
688 | /* Like free, but checks block for overrun. */ |
689 | ||
212f33f1 KS |
690 | void |
691 | overrun_check_free (block) | |
692 | POINTER_TYPE *block; | |
693 | { | |
bdbed949 | 694 | unsigned char *val = (unsigned char *)block; |
212f33f1 | 695 | |
857ae68b | 696 | ++check_depth; |
212f33f1 | 697 | if (val |
857ae68b | 698 | && check_depth == 1 |
212f33f1 KS |
699 | && bcmp (xmalloc_overrun_check_header, |
700 | val - XMALLOC_OVERRUN_CHECK_SIZE, | |
701 | XMALLOC_OVERRUN_CHECK_SIZE - 4) == 0) | |
702 | { | |
bdbed949 | 703 | size_t osize = XMALLOC_GET_SIZE (val); |
212f33f1 KS |
704 | if (bcmp (xmalloc_overrun_check_trailer, |
705 | val + osize, | |
706 | XMALLOC_OVERRUN_CHECK_SIZE)) | |
707 | abort (); | |
454d7973 KS |
708 | #ifdef XMALLOC_CLEAR_FREE_MEMORY |
709 | val -= XMALLOC_OVERRUN_CHECK_SIZE; | |
710 | memset (val, 0xff, osize + XMALLOC_OVERRUN_CHECK_SIZE*2); | |
711 | #else | |
bdbed949 | 712 | bzero (val + osize, XMALLOC_OVERRUN_CHECK_SIZE); |
212f33f1 | 713 | val -= XMALLOC_OVERRUN_CHECK_SIZE; |
bdbed949 | 714 | bzero (val, XMALLOC_OVERRUN_CHECK_SIZE); |
454d7973 | 715 | #endif |
212f33f1 KS |
716 | } |
717 | ||
718 | free (val); | |
857ae68b | 719 | --check_depth; |
212f33f1 KS |
720 | } |
721 | ||
722 | #undef malloc | |
723 | #undef realloc | |
724 | #undef free | |
725 | #define malloc overrun_check_malloc | |
726 | #define realloc overrun_check_realloc | |
727 | #define free overrun_check_free | |
728 | #endif | |
729 | ||
bdbed949 KS |
730 | |
731 | /* Like malloc but check for no memory and block interrupt input.. */ | |
732 | ||
c971ff9a | 733 | POINTER_TYPE * |
7146af97 | 734 | xmalloc (size) |
675d5130 | 735 | size_t size; |
7146af97 | 736 | { |
c971ff9a | 737 | register POINTER_TYPE *val; |
7146af97 | 738 | |
9ac0d9e0 | 739 | BLOCK_INPUT; |
c971ff9a | 740 | val = (POINTER_TYPE *) malloc (size); |
9ac0d9e0 | 741 | UNBLOCK_INPUT; |
7146af97 | 742 | |
2e471eb5 GM |
743 | if (!val && size) |
744 | memory_full (); | |
7146af97 JB |
745 | return val; |
746 | } | |
747 | ||
34400008 GM |
748 | |
749 | /* Like realloc but check for no memory and block interrupt input.. */ | |
750 | ||
c971ff9a | 751 | POINTER_TYPE * |
7146af97 | 752 | xrealloc (block, size) |
c971ff9a | 753 | POINTER_TYPE *block; |
675d5130 | 754 | size_t size; |
7146af97 | 755 | { |
c971ff9a | 756 | register POINTER_TYPE *val; |
7146af97 | 757 | |
9ac0d9e0 | 758 | BLOCK_INPUT; |
56d2031b JB |
759 | /* We must call malloc explicitly when BLOCK is 0, since some |
760 | reallocs don't do this. */ | |
761 | if (! block) | |
c971ff9a | 762 | val = (POINTER_TYPE *) malloc (size); |
f048679d | 763 | else |
c971ff9a | 764 | val = (POINTER_TYPE *) realloc (block, size); |
9ac0d9e0 | 765 | UNBLOCK_INPUT; |
7146af97 JB |
766 | |
767 | if (!val && size) memory_full (); | |
768 | return val; | |
769 | } | |
9ac0d9e0 | 770 | |
34400008 | 771 | |
d7489312 | 772 | /* Like free but block interrupt input. */ |
34400008 | 773 | |
9ac0d9e0 JB |
774 | void |
775 | xfree (block) | |
c971ff9a | 776 | POINTER_TYPE *block; |
9ac0d9e0 JB |
777 | { |
778 | BLOCK_INPUT; | |
779 | free (block); | |
780 | UNBLOCK_INPUT; | |
781 | } | |
782 | ||
c8099634 | 783 | |
dca7c6a8 GM |
784 | /* Like strdup, but uses xmalloc. */ |
785 | ||
786 | char * | |
787 | xstrdup (s) | |
943b873e | 788 | const char *s; |
dca7c6a8 | 789 | { |
675d5130 | 790 | size_t len = strlen (s) + 1; |
dca7c6a8 GM |
791 | char *p = (char *) xmalloc (len); |
792 | bcopy (s, p, len); | |
793 | return p; | |
794 | } | |
795 | ||
796 | ||
f61bef8b KS |
797 | /* Unwind for SAFE_ALLOCA */ |
798 | ||
799 | Lisp_Object | |
800 | safe_alloca_unwind (arg) | |
801 | Lisp_Object arg; | |
802 | { | |
b766f870 KS |
803 | register struct Lisp_Save_Value *p = XSAVE_VALUE (arg); |
804 | ||
805 | p->dogc = 0; | |
806 | xfree (p->pointer); | |
807 | p->pointer = 0; | |
7b7990cc | 808 | free_misc (arg); |
f61bef8b KS |
809 | return Qnil; |
810 | } | |
811 | ||
812 | ||
34400008 GM |
813 | /* Like malloc but used for allocating Lisp data. NBYTES is the |
814 | number of bytes to allocate, TYPE describes the intended use of the | |
815 | allcated memory block (for strings, for conses, ...). */ | |
816 | ||
212f33f1 | 817 | #ifndef USE_LSB_TAG |
918a23a7 | 818 | static void *lisp_malloc_loser; |
212f33f1 | 819 | #endif |
918a23a7 | 820 | |
675d5130 | 821 | static POINTER_TYPE * |
34400008 | 822 | lisp_malloc (nbytes, type) |
675d5130 | 823 | size_t nbytes; |
34400008 | 824 | enum mem_type type; |
c8099634 | 825 | { |
34400008 | 826 | register void *val; |
c8099634 RS |
827 | |
828 | BLOCK_INPUT; | |
877935b1 GM |
829 | |
830 | #ifdef GC_MALLOC_CHECK | |
831 | allocated_mem_type = type; | |
832 | #endif | |
177c0ea7 | 833 | |
34400008 | 834 | val = (void *) malloc (nbytes); |
c8099634 | 835 | |
831b476c | 836 | #ifndef USE_LSB_TAG |
918a23a7 RS |
837 | /* If the memory just allocated cannot be addressed thru a Lisp |
838 | object's pointer, and it needs to be, | |
839 | that's equivalent to running out of memory. */ | |
840 | if (val && type != MEM_TYPE_NON_LISP) | |
841 | { | |
842 | Lisp_Object tem; | |
843 | XSETCONS (tem, (char *) val + nbytes - 1); | |
844 | if ((char *) XCONS (tem) != (char *) val + nbytes - 1) | |
845 | { | |
846 | lisp_malloc_loser = val; | |
847 | free (val); | |
848 | val = 0; | |
849 | } | |
850 | } | |
831b476c | 851 | #endif |
918a23a7 | 852 | |
877935b1 | 853 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
dca7c6a8 | 854 | if (val && type != MEM_TYPE_NON_LISP) |
34400008 GM |
855 | mem_insert (val, (char *) val + nbytes, type); |
856 | #endif | |
177c0ea7 | 857 | |
dca7c6a8 GM |
858 | UNBLOCK_INPUT; |
859 | if (!val && nbytes) | |
860 | memory_full (); | |
c8099634 RS |
861 | return val; |
862 | } | |
863 | ||
34400008 GM |
864 | /* Free BLOCK. This must be called to free memory allocated with a |
865 | call to lisp_malloc. */ | |
866 | ||
bf952fb6 | 867 | static void |
c8099634 | 868 | lisp_free (block) |
675d5130 | 869 | POINTER_TYPE *block; |
c8099634 RS |
870 | { |
871 | BLOCK_INPUT; | |
c8099634 | 872 | free (block); |
877935b1 | 873 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
34400008 GM |
874 | mem_delete (mem_find (block)); |
875 | #endif | |
c8099634 RS |
876 | UNBLOCK_INPUT; |
877 | } | |
34400008 | 878 | |
ab6780cd SM |
879 | /* Allocation of aligned blocks of memory to store Lisp data. */ |
880 | /* The entry point is lisp_align_malloc which returns blocks of at most */ | |
881 | /* BLOCK_BYTES and guarantees they are aligned on a BLOCK_ALIGN boundary. */ | |
882 | ||
883 | ||
884 | /* BLOCK_ALIGN has to be a power of 2. */ | |
885 | #define BLOCK_ALIGN (1 << 10) | |
ab6780cd SM |
886 | |
887 | /* Padding to leave at the end of a malloc'd block. This is to give | |
888 | malloc a chance to minimize the amount of memory wasted to alignment. | |
889 | It should be tuned to the particular malloc library used. | |
19bcad1f SM |
890 | On glibc-2.3.2, malloc never tries to align, so a padding of 0 is best. |
891 | posix_memalign on the other hand would ideally prefer a value of 4 | |
892 | because otherwise, there's 1020 bytes wasted between each ablocks. | |
893 | But testing shows that those 1020 will most of the time be efficiently | |
894 | used by malloc to place other objects, so a value of 0 is still preferable | |
895 | unless you have a lot of cons&floats and virtually nothing else. */ | |
896 | #define BLOCK_PADDING 0 | |
897 | #define BLOCK_BYTES \ | |
898 | (BLOCK_ALIGN - sizeof (struct aligned_block *) - BLOCK_PADDING) | |
899 | ||
900 | /* Internal data structures and constants. */ | |
901 | ||
ab6780cd SM |
902 | #define ABLOCKS_SIZE 16 |
903 | ||
904 | /* An aligned block of memory. */ | |
905 | struct ablock | |
906 | { | |
907 | union | |
908 | { | |
909 | char payload[BLOCK_BYTES]; | |
910 | struct ablock *next_free; | |
911 | } x; | |
912 | /* `abase' is the aligned base of the ablocks. */ | |
913 | /* It is overloaded to hold the virtual `busy' field that counts | |
914 | the number of used ablock in the parent ablocks. | |
915 | The first ablock has the `busy' field, the others have the `abase' | |
916 | field. To tell the difference, we assume that pointers will have | |
917 | integer values larger than 2 * ABLOCKS_SIZE. The lowest bit of `busy' | |
918 | is used to tell whether the real base of the parent ablocks is `abase' | |
919 | (if not, the word before the first ablock holds a pointer to the | |
920 | real base). */ | |
921 | struct ablocks *abase; | |
922 | /* The padding of all but the last ablock is unused. The padding of | |
923 | the last ablock in an ablocks is not allocated. */ | |
19bcad1f SM |
924 | #if BLOCK_PADDING |
925 | char padding[BLOCK_PADDING]; | |
ebb8d410 | 926 | #endif |
ab6780cd SM |
927 | }; |
928 | ||
929 | /* A bunch of consecutive aligned blocks. */ | |
930 | struct ablocks | |
931 | { | |
932 | struct ablock blocks[ABLOCKS_SIZE]; | |
933 | }; | |
934 | ||
935 | /* Size of the block requested from malloc or memalign. */ | |
19bcad1f | 936 | #define ABLOCKS_BYTES (sizeof (struct ablocks) - BLOCK_PADDING) |
ab6780cd SM |
937 | |
938 | #define ABLOCK_ABASE(block) \ | |
939 | (((unsigned long) (block)->abase) <= (1 + 2 * ABLOCKS_SIZE) \ | |
940 | ? (struct ablocks *)(block) \ | |
941 | : (block)->abase) | |
942 | ||
943 | /* Virtual `busy' field. */ | |
944 | #define ABLOCKS_BUSY(abase) ((abase)->blocks[0].abase) | |
945 | ||
946 | /* Pointer to the (not necessarily aligned) malloc block. */ | |
19bcad1f SM |
947 | #ifdef HAVE_POSIX_MEMALIGN |
948 | #define ABLOCKS_BASE(abase) (abase) | |
949 | #else | |
ab6780cd | 950 | #define ABLOCKS_BASE(abase) \ |
03bb6a06 | 951 | (1 & (long) ABLOCKS_BUSY (abase) ? abase : ((void**)abase)[-1]) |
19bcad1f | 952 | #endif |
ab6780cd SM |
953 | |
954 | /* The list of free ablock. */ | |
955 | static struct ablock *free_ablock; | |
956 | ||
957 | /* Allocate an aligned block of nbytes. | |
958 | Alignment is on a multiple of BLOCK_ALIGN and `nbytes' has to be | |
959 | smaller or equal to BLOCK_BYTES. */ | |
960 | static POINTER_TYPE * | |
961 | lisp_align_malloc (nbytes, type) | |
962 | size_t nbytes; | |
963 | enum mem_type type; | |
964 | { | |
965 | void *base, *val; | |
966 | struct ablocks *abase; | |
967 | ||
968 | eassert (nbytes <= BLOCK_BYTES); | |
969 | ||
970 | BLOCK_INPUT; | |
971 | ||
972 | #ifdef GC_MALLOC_CHECK | |
973 | allocated_mem_type = type; | |
974 | #endif | |
975 | ||
976 | if (!free_ablock) | |
977 | { | |
d7489312 DL |
978 | int i; |
979 | EMACS_INT aligned; /* int gets warning casting to 64-bit pointer. */ | |
ab6780cd SM |
980 | |
981 | #ifdef DOUG_LEA_MALLOC | |
982 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed | |
983 | because mapped region contents are not preserved in | |
984 | a dumped Emacs. */ | |
985 | mallopt (M_MMAP_MAX, 0); | |
986 | #endif | |
987 | ||
19bcad1f SM |
988 | #ifdef HAVE_POSIX_MEMALIGN |
989 | { | |
990 | int err = posix_memalign (&base, BLOCK_ALIGN, ABLOCKS_BYTES); | |
ab349c19 RS |
991 | if (err) |
992 | base = NULL; | |
993 | abase = base; | |
19bcad1f SM |
994 | } |
995 | #else | |
ab6780cd SM |
996 | base = malloc (ABLOCKS_BYTES); |
997 | abase = ALIGN (base, BLOCK_ALIGN); | |
ab349c19 RS |
998 | #endif |
999 | ||
4532fdde RS |
1000 | if (base == 0) |
1001 | { | |
1002 | UNBLOCK_INPUT; | |
1003 | memory_full (); | |
1004 | } | |
ab6780cd SM |
1005 | |
1006 | aligned = (base == abase); | |
1007 | if (!aligned) | |
1008 | ((void**)abase)[-1] = base; | |
1009 | ||
1010 | #ifdef DOUG_LEA_MALLOC | |
1011 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
1012 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
1013 | #endif | |
1014 | ||
831b476c | 1015 | #ifndef USE_LSB_TAG |
f4446bbf GM |
1016 | /* If the memory just allocated cannot be addressed thru a Lisp |
1017 | object's pointer, and it needs to be, that's equivalent to | |
1018 | running out of memory. */ | |
1019 | if (type != MEM_TYPE_NON_LISP) | |
1020 | { | |
1021 | Lisp_Object tem; | |
1022 | char *end = (char *) base + ABLOCKS_BYTES - 1; | |
1023 | XSETCONS (tem, end); | |
1024 | if ((char *) XCONS (tem) != end) | |
1025 | { | |
1026 | lisp_malloc_loser = base; | |
1027 | free (base); | |
1028 | UNBLOCK_INPUT; | |
1029 | memory_full (); | |
1030 | } | |
1031 | } | |
831b476c | 1032 | #endif |
f4446bbf | 1033 | |
ab6780cd SM |
1034 | /* Initialize the blocks and put them on the free list. |
1035 | Is `base' was not properly aligned, we can't use the last block. */ | |
1036 | for (i = 0; i < (aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1); i++) | |
1037 | { | |
1038 | abase->blocks[i].abase = abase; | |
1039 | abase->blocks[i].x.next_free = free_ablock; | |
1040 | free_ablock = &abase->blocks[i]; | |
1041 | } | |
03bb6a06 | 1042 | ABLOCKS_BUSY (abase) = (struct ablocks *) (long) aligned; |
ab6780cd | 1043 | |
19bcad1f | 1044 | eassert (0 == ((EMACS_UINT)abase) % BLOCK_ALIGN); |
ab6780cd SM |
1045 | eassert (ABLOCK_ABASE (&abase->blocks[3]) == abase); /* 3 is arbitrary */ |
1046 | eassert (ABLOCK_ABASE (&abase->blocks[0]) == abase); | |
1047 | eassert (ABLOCKS_BASE (abase) == base); | |
03bb6a06 | 1048 | eassert (aligned == (long) ABLOCKS_BUSY (abase)); |
ab6780cd SM |
1049 | } |
1050 | ||
1051 | abase = ABLOCK_ABASE (free_ablock); | |
03bb6a06 | 1052 | ABLOCKS_BUSY (abase) = (struct ablocks *) (2 + (long) ABLOCKS_BUSY (abase)); |
ab6780cd SM |
1053 | val = free_ablock; |
1054 | free_ablock = free_ablock->x.next_free; | |
1055 | ||
ab6780cd SM |
1056 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
1057 | if (val && type != MEM_TYPE_NON_LISP) | |
1058 | mem_insert (val, (char *) val + nbytes, type); | |
1059 | #endif | |
1060 | ||
1061 | UNBLOCK_INPUT; | |
1062 | if (!val && nbytes) | |
1063 | memory_full (); | |
1064 | ||
1065 | eassert (0 == ((EMACS_UINT)val) % BLOCK_ALIGN); | |
1066 | return val; | |
1067 | } | |
1068 | ||
1069 | static void | |
1070 | lisp_align_free (block) | |
1071 | POINTER_TYPE *block; | |
1072 | { | |
1073 | struct ablock *ablock = block; | |
1074 | struct ablocks *abase = ABLOCK_ABASE (ablock); | |
1075 | ||
1076 | BLOCK_INPUT; | |
1077 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK | |
1078 | mem_delete (mem_find (block)); | |
1079 | #endif | |
1080 | /* Put on free list. */ | |
1081 | ablock->x.next_free = free_ablock; | |
1082 | free_ablock = ablock; | |
1083 | /* Update busy count. */ | |
03bb6a06 | 1084 | ABLOCKS_BUSY (abase) = (struct ablocks *) (-2 + (long) ABLOCKS_BUSY (abase)); |
d2db1c32 | 1085 | |
03bb6a06 | 1086 | if (2 > (long) ABLOCKS_BUSY (abase)) |
ab6780cd | 1087 | { /* All the blocks are free. */ |
03bb6a06 | 1088 | int i = 0, aligned = (long) ABLOCKS_BUSY (abase); |
ab6780cd SM |
1089 | struct ablock **tem = &free_ablock; |
1090 | struct ablock *atop = &abase->blocks[aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1]; | |
1091 | ||
1092 | while (*tem) | |
1093 | { | |
1094 | if (*tem >= (struct ablock *) abase && *tem < atop) | |
1095 | { | |
1096 | i++; | |
1097 | *tem = (*tem)->x.next_free; | |
1098 | } | |
1099 | else | |
1100 | tem = &(*tem)->x.next_free; | |
1101 | } | |
1102 | eassert ((aligned & 1) == aligned); | |
1103 | eassert (i == (aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1)); | |
1104 | free (ABLOCKS_BASE (abase)); | |
1105 | } | |
1106 | UNBLOCK_INPUT; | |
1107 | } | |
3ef06d12 SM |
1108 | |
1109 | /* Return a new buffer structure allocated from the heap with | |
1110 | a call to lisp_malloc. */ | |
1111 | ||
1112 | struct buffer * | |
1113 | allocate_buffer () | |
1114 | { | |
1115 | struct buffer *b | |
1116 | = (struct buffer *) lisp_malloc (sizeof (struct buffer), | |
1117 | MEM_TYPE_BUFFER); | |
1118 | return b; | |
1119 | } | |
1120 | ||
9ac0d9e0 | 1121 | \f |
026cdede SM |
1122 | #ifndef SYSTEM_MALLOC |
1123 | ||
1124 | /* If we released our reserve (due to running out of memory), | |
1125 | and we have a fair amount free once again, | |
1126 | try to set aside another reserve in case we run out once more. | |
1127 | ||
1128 | This is called when a relocatable block is freed in ralloc.c. */ | |
1129 | ||
1130 | void | |
1131 | refill_memory_reserve () | |
1132 | { | |
1133 | if (spare_memory == 0) | |
1134 | spare_memory = (char *) malloc ((size_t) SPARE_MEMORY); | |
1135 | } | |
1136 | ||
1137 | \f | |
9ac0d9e0 JB |
1138 | /* Arranging to disable input signals while we're in malloc. |
1139 | ||
1140 | This only works with GNU malloc. To help out systems which can't | |
1141 | use GNU malloc, all the calls to malloc, realloc, and free | |
1142 | elsewhere in the code should be inside a BLOCK_INPUT/UNBLOCK_INPUT | |
026cdede | 1143 | pair; unfortunately, we have no idea what C library functions |
9ac0d9e0 | 1144 | might call malloc, so we can't really protect them unless you're |
2c5bd608 DL |
1145 | using GNU malloc. Fortunately, most of the major operating systems |
1146 | can use GNU malloc. */ | |
9ac0d9e0 | 1147 | |
026cdede SM |
1148 | #ifndef SYNC_INPUT |
1149 | ||
b3303f74 DL |
1150 | #ifndef DOUG_LEA_MALLOC |
1151 | extern void * (*__malloc_hook) P_ ((size_t)); | |
1152 | extern void * (*__realloc_hook) P_ ((void *, size_t)); | |
1153 | extern void (*__free_hook) P_ ((void *)); | |
1154 | /* Else declared in malloc.h, perhaps with an extra arg. */ | |
1155 | #endif /* DOUG_LEA_MALLOC */ | |
b0846f52 | 1156 | static void * (*old_malloc_hook) (); |
b0846f52 | 1157 | static void * (*old_realloc_hook) (); |
b0846f52 | 1158 | static void (*old_free_hook) (); |
9ac0d9e0 | 1159 | |
276cbe5a RS |
1160 | /* This function is used as the hook for free to call. */ |
1161 | ||
9ac0d9e0 JB |
1162 | static void |
1163 | emacs_blocked_free (ptr) | |
1164 | void *ptr; | |
1165 | { | |
aa477689 | 1166 | BLOCK_INPUT_ALLOC; |
877935b1 GM |
1167 | |
1168 | #ifdef GC_MALLOC_CHECK | |
a83fee2c GM |
1169 | if (ptr) |
1170 | { | |
1171 | struct mem_node *m; | |
177c0ea7 | 1172 | |
a83fee2c GM |
1173 | m = mem_find (ptr); |
1174 | if (m == MEM_NIL || m->start != ptr) | |
1175 | { | |
1176 | fprintf (stderr, | |
1177 | "Freeing `%p' which wasn't allocated with malloc\n", ptr); | |
1178 | abort (); | |
1179 | } | |
1180 | else | |
1181 | { | |
1182 | /* fprintf (stderr, "free %p...%p (%p)\n", m->start, m->end, ptr); */ | |
1183 | mem_delete (m); | |
1184 | } | |
1185 | } | |
877935b1 | 1186 | #endif /* GC_MALLOC_CHECK */ |
177c0ea7 | 1187 | |
9ac0d9e0 JB |
1188 | __free_hook = old_free_hook; |
1189 | free (ptr); | |
177c0ea7 | 1190 | |
276cbe5a RS |
1191 | /* If we released our reserve (due to running out of memory), |
1192 | and we have a fair amount free once again, | |
1193 | try to set aside another reserve in case we run out once more. */ | |
1194 | if (spare_memory == 0 | |
1195 | /* Verify there is enough space that even with the malloc | |
1196 | hysteresis this call won't run out again. | |
1197 | The code here is correct as long as SPARE_MEMORY | |
1198 | is substantially larger than the block size malloc uses. */ | |
1199 | && (bytes_used_when_full | |
d1658221 | 1200 | > BYTES_USED + max (malloc_hysteresis, 4) * SPARE_MEMORY)) |
675d5130 | 1201 | spare_memory = (char *) malloc ((size_t) SPARE_MEMORY); |
276cbe5a | 1202 | |
b0846f52 | 1203 | __free_hook = emacs_blocked_free; |
aa477689 | 1204 | UNBLOCK_INPUT_ALLOC; |
9ac0d9e0 JB |
1205 | } |
1206 | ||
34400008 | 1207 | |
276cbe5a RS |
1208 | /* This function is the malloc hook that Emacs uses. */ |
1209 | ||
9ac0d9e0 JB |
1210 | static void * |
1211 | emacs_blocked_malloc (size) | |
675d5130 | 1212 | size_t size; |
9ac0d9e0 JB |
1213 | { |
1214 | void *value; | |
1215 | ||
aa477689 | 1216 | BLOCK_INPUT_ALLOC; |
9ac0d9e0 | 1217 | __malloc_hook = old_malloc_hook; |
1177ecf6 | 1218 | #ifdef DOUG_LEA_MALLOC |
d1658221 | 1219 | mallopt (M_TOP_PAD, malloc_hysteresis * 4096); |
1177ecf6 | 1220 | #else |
d1658221 | 1221 | __malloc_extra_blocks = malloc_hysteresis; |
1177ecf6 | 1222 | #endif |
877935b1 | 1223 | |
2756d8ee | 1224 | value = (void *) malloc (size); |
877935b1 GM |
1225 | |
1226 | #ifdef GC_MALLOC_CHECK | |
1227 | { | |
1228 | struct mem_node *m = mem_find (value); | |
1229 | if (m != MEM_NIL) | |
1230 | { | |
1231 | fprintf (stderr, "Malloc returned %p which is already in use\n", | |
1232 | value); | |
1233 | fprintf (stderr, "Region in use is %p...%p, %u bytes, type %d\n", | |
1234 | m->start, m->end, (char *) m->end - (char *) m->start, | |
1235 | m->type); | |
1236 | abort (); | |
1237 | } | |
1238 | ||
1239 | if (!dont_register_blocks) | |
1240 | { | |
1241 | mem_insert (value, (char *) value + max (1, size), allocated_mem_type); | |
1242 | allocated_mem_type = MEM_TYPE_NON_LISP; | |
1243 | } | |
1244 | } | |
1245 | #endif /* GC_MALLOC_CHECK */ | |
177c0ea7 | 1246 | |
b0846f52 | 1247 | __malloc_hook = emacs_blocked_malloc; |
aa477689 | 1248 | UNBLOCK_INPUT_ALLOC; |
9ac0d9e0 | 1249 | |
877935b1 | 1250 | /* fprintf (stderr, "%p malloc\n", value); */ |
9ac0d9e0 JB |
1251 | return value; |
1252 | } | |
1253 | ||
34400008 GM |
1254 | |
1255 | /* This function is the realloc hook that Emacs uses. */ | |
1256 | ||
9ac0d9e0 JB |
1257 | static void * |
1258 | emacs_blocked_realloc (ptr, size) | |
1259 | void *ptr; | |
675d5130 | 1260 | size_t size; |
9ac0d9e0 JB |
1261 | { |
1262 | void *value; | |
1263 | ||
aa477689 | 1264 | BLOCK_INPUT_ALLOC; |
9ac0d9e0 | 1265 | __realloc_hook = old_realloc_hook; |
877935b1 GM |
1266 | |
1267 | #ifdef GC_MALLOC_CHECK | |
1268 | if (ptr) | |
1269 | { | |
1270 | struct mem_node *m = mem_find (ptr); | |
1271 | if (m == MEM_NIL || m->start != ptr) | |
1272 | { | |
1273 | fprintf (stderr, | |
1274 | "Realloc of %p which wasn't allocated with malloc\n", | |
1275 | ptr); | |
1276 | abort (); | |
1277 | } | |
1278 | ||
1279 | mem_delete (m); | |
1280 | } | |
177c0ea7 | 1281 | |
877935b1 | 1282 | /* fprintf (stderr, "%p -> realloc\n", ptr); */ |
177c0ea7 | 1283 | |
877935b1 GM |
1284 | /* Prevent malloc from registering blocks. */ |
1285 | dont_register_blocks = 1; | |
1286 | #endif /* GC_MALLOC_CHECK */ | |
1287 | ||
2756d8ee | 1288 | value = (void *) realloc (ptr, size); |
877935b1 GM |
1289 | |
1290 | #ifdef GC_MALLOC_CHECK | |
1291 | dont_register_blocks = 0; | |
1292 | ||
1293 | { | |
1294 | struct mem_node *m = mem_find (value); | |
1295 | if (m != MEM_NIL) | |
1296 | { | |
1297 | fprintf (stderr, "Realloc returns memory that is already in use\n"); | |
1298 | abort (); | |
1299 | } | |
1300 | ||
1301 | /* Can't handle zero size regions in the red-black tree. */ | |
1302 | mem_insert (value, (char *) value + max (size, 1), MEM_TYPE_NON_LISP); | |
1303 | } | |
177c0ea7 | 1304 | |
877935b1 GM |
1305 | /* fprintf (stderr, "%p <- realloc\n", value); */ |
1306 | #endif /* GC_MALLOC_CHECK */ | |
177c0ea7 | 1307 | |
b0846f52 | 1308 | __realloc_hook = emacs_blocked_realloc; |
aa477689 | 1309 | UNBLOCK_INPUT_ALLOC; |
9ac0d9e0 JB |
1310 | |
1311 | return value; | |
1312 | } | |
1313 | ||
34400008 | 1314 | |
aa477689 JD |
1315 | #ifdef HAVE_GTK_AND_PTHREAD |
1316 | /* Called from Fdump_emacs so that when the dumped Emacs starts, it has a | |
1317 | normal malloc. Some thread implementations need this as they call | |
1318 | malloc before main. The pthread_self call in BLOCK_INPUT_ALLOC then | |
1319 | calls malloc because it is the first call, and we have an endless loop. */ | |
1320 | ||
1321 | void | |
1322 | reset_malloc_hooks () | |
1323 | { | |
1324 | __free_hook = 0; | |
1325 | __malloc_hook = 0; | |
1326 | __realloc_hook = 0; | |
1327 | } | |
1328 | #endif /* HAVE_GTK_AND_PTHREAD */ | |
1329 | ||
1330 | ||
34400008 GM |
1331 | /* Called from main to set up malloc to use our hooks. */ |
1332 | ||
9ac0d9e0 JB |
1333 | void |
1334 | uninterrupt_malloc () | |
1335 | { | |
aa477689 JD |
1336 | #ifdef HAVE_GTK_AND_PTHREAD |
1337 | pthread_mutexattr_t attr; | |
1338 | ||
1339 | /* GLIBC has a faster way to do this, but lets keep it portable. | |
1340 | This is according to the Single UNIX Specification. */ | |
1341 | pthread_mutexattr_init (&attr); | |
1342 | pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE); | |
1343 | pthread_mutex_init (&alloc_mutex, &attr); | |
aa477689 JD |
1344 | #endif /* HAVE_GTK_AND_PTHREAD */ |
1345 | ||
c8099634 RS |
1346 | if (__free_hook != emacs_blocked_free) |
1347 | old_free_hook = __free_hook; | |
b0846f52 | 1348 | __free_hook = emacs_blocked_free; |
9ac0d9e0 | 1349 | |
c8099634 RS |
1350 | if (__malloc_hook != emacs_blocked_malloc) |
1351 | old_malloc_hook = __malloc_hook; | |
b0846f52 | 1352 | __malloc_hook = emacs_blocked_malloc; |
9ac0d9e0 | 1353 | |
c8099634 RS |
1354 | if (__realloc_hook != emacs_blocked_realloc) |
1355 | old_realloc_hook = __realloc_hook; | |
b0846f52 | 1356 | __realloc_hook = emacs_blocked_realloc; |
9ac0d9e0 | 1357 | } |
2e471eb5 | 1358 | |
026cdede | 1359 | #endif /* not SYNC_INPUT */ |
2e471eb5 GM |
1360 | #endif /* not SYSTEM_MALLOC */ |
1361 | ||
1362 | ||
7146af97 | 1363 | \f |
2e471eb5 GM |
1364 | /*********************************************************************** |
1365 | Interval Allocation | |
1366 | ***********************************************************************/ | |
1a4f1e2c | 1367 | |
34400008 GM |
1368 | /* Number of intervals allocated in an interval_block structure. |
1369 | The 1020 is 1024 minus malloc overhead. */ | |
1370 | ||
d5e35230 JA |
1371 | #define INTERVAL_BLOCK_SIZE \ |
1372 | ((1020 - sizeof (struct interval_block *)) / sizeof (struct interval)) | |
1373 | ||
34400008 GM |
1374 | /* Intervals are allocated in chunks in form of an interval_block |
1375 | structure. */ | |
1376 | ||
d5e35230 | 1377 | struct interval_block |
2e471eb5 | 1378 | { |
d05b383a | 1379 | /* Place `intervals' first, to preserve alignment. */ |
2e471eb5 | 1380 | struct interval intervals[INTERVAL_BLOCK_SIZE]; |
d05b383a | 1381 | struct interval_block *next; |
2e471eb5 | 1382 | }; |
d5e35230 | 1383 | |
34400008 GM |
1384 | /* Current interval block. Its `next' pointer points to older |
1385 | blocks. */ | |
1386 | ||
d5e35230 | 1387 | struct interval_block *interval_block; |
34400008 GM |
1388 | |
1389 | /* Index in interval_block above of the next unused interval | |
1390 | structure. */ | |
1391 | ||
d5e35230 | 1392 | static int interval_block_index; |
34400008 GM |
1393 | |
1394 | /* Number of free and live intervals. */ | |
1395 | ||
2e471eb5 | 1396 | static int total_free_intervals, total_intervals; |
d5e35230 | 1397 | |
34400008 GM |
1398 | /* List of free intervals. */ |
1399 | ||
d5e35230 JA |
1400 | INTERVAL interval_free_list; |
1401 | ||
c8099634 | 1402 | /* Total number of interval blocks now in use. */ |
2e471eb5 | 1403 | |
c8099634 RS |
1404 | int n_interval_blocks; |
1405 | ||
34400008 GM |
1406 | |
1407 | /* Initialize interval allocation. */ | |
1408 | ||
d5e35230 JA |
1409 | static void |
1410 | init_intervals () | |
1411 | { | |
0930c1a1 SM |
1412 | interval_block = NULL; |
1413 | interval_block_index = INTERVAL_BLOCK_SIZE; | |
d5e35230 | 1414 | interval_free_list = 0; |
0930c1a1 | 1415 | n_interval_blocks = 0; |
d5e35230 JA |
1416 | } |
1417 | ||
34400008 GM |
1418 | |
1419 | /* Return a new interval. */ | |
d5e35230 JA |
1420 | |
1421 | INTERVAL | |
1422 | make_interval () | |
1423 | { | |
1424 | INTERVAL val; | |
1425 | ||
1426 | if (interval_free_list) | |
1427 | { | |
1428 | val = interval_free_list; | |
439d5cb4 | 1429 | interval_free_list = INTERVAL_PARENT (interval_free_list); |
d5e35230 JA |
1430 | } |
1431 | else | |
1432 | { | |
1433 | if (interval_block_index == INTERVAL_BLOCK_SIZE) | |
1434 | { | |
3c06d205 KH |
1435 | register struct interval_block *newi; |
1436 | ||
34400008 GM |
1437 | newi = (struct interval_block *) lisp_malloc (sizeof *newi, |
1438 | MEM_TYPE_NON_LISP); | |
d5e35230 | 1439 | |
d5e35230 JA |
1440 | newi->next = interval_block; |
1441 | interval_block = newi; | |
1442 | interval_block_index = 0; | |
c8099634 | 1443 | n_interval_blocks++; |
d5e35230 JA |
1444 | } |
1445 | val = &interval_block->intervals[interval_block_index++]; | |
1446 | } | |
1447 | consing_since_gc += sizeof (struct interval); | |
310ea200 | 1448 | intervals_consed++; |
d5e35230 | 1449 | RESET_INTERVAL (val); |
2336fe58 | 1450 | val->gcmarkbit = 0; |
d5e35230 JA |
1451 | return val; |
1452 | } | |
1453 | ||
34400008 GM |
1454 | |
1455 | /* Mark Lisp objects in interval I. */ | |
d5e35230 JA |
1456 | |
1457 | static void | |
d393c068 | 1458 | mark_interval (i, dummy) |
d5e35230 | 1459 | register INTERVAL i; |
d393c068 | 1460 | Lisp_Object dummy; |
d5e35230 | 1461 | { |
2336fe58 SM |
1462 | eassert (!i->gcmarkbit); /* Intervals are never shared. */ |
1463 | i->gcmarkbit = 1; | |
49723c04 | 1464 | mark_object (i->plist); |
d5e35230 JA |
1465 | } |
1466 | ||
34400008 GM |
1467 | |
1468 | /* Mark the interval tree rooted in TREE. Don't call this directly; | |
1469 | use the macro MARK_INTERVAL_TREE instead. */ | |
1470 | ||
d5e35230 JA |
1471 | static void |
1472 | mark_interval_tree (tree) | |
1473 | register INTERVAL tree; | |
1474 | { | |
e8720644 JB |
1475 | /* No need to test if this tree has been marked already; this |
1476 | function is always called through the MARK_INTERVAL_TREE macro, | |
1477 | which takes care of that. */ | |
1478 | ||
1e934989 | 1479 | traverse_intervals_noorder (tree, mark_interval, Qnil); |
d5e35230 JA |
1480 | } |
1481 | ||
34400008 GM |
1482 | |
1483 | /* Mark the interval tree rooted in I. */ | |
1484 | ||
e8720644 JB |
1485 | #define MARK_INTERVAL_TREE(i) \ |
1486 | do { \ | |
2336fe58 | 1487 | if (!NULL_INTERVAL_P (i) && !i->gcmarkbit) \ |
e8720644 JB |
1488 | mark_interval_tree (i); \ |
1489 | } while (0) | |
d5e35230 | 1490 | |
34400008 | 1491 | |
2e471eb5 GM |
1492 | #define UNMARK_BALANCE_INTERVALS(i) \ |
1493 | do { \ | |
1494 | if (! NULL_INTERVAL_P (i)) \ | |
2336fe58 | 1495 | (i) = balance_intervals (i); \ |
2e471eb5 | 1496 | } while (0) |
d5e35230 | 1497 | |
cc2d8c6b KR |
1498 | \f |
1499 | /* Number support. If NO_UNION_TYPE isn't in effect, we | |
1500 | can't create number objects in macros. */ | |
1501 | #ifndef make_number | |
1502 | Lisp_Object | |
1503 | make_number (n) | |
1504 | int n; | |
1505 | { | |
1506 | Lisp_Object obj; | |
1507 | obj.s.val = n; | |
1508 | obj.s.type = Lisp_Int; | |
1509 | return obj; | |
1510 | } | |
1511 | #endif | |
d5e35230 | 1512 | \f |
2e471eb5 GM |
1513 | /*********************************************************************** |
1514 | String Allocation | |
1515 | ***********************************************************************/ | |
1a4f1e2c | 1516 | |
2e471eb5 GM |
1517 | /* Lisp_Strings are allocated in string_block structures. When a new |
1518 | string_block is allocated, all the Lisp_Strings it contains are | |
e0fead5d | 1519 | added to a free-list string_free_list. When a new Lisp_String is |
2e471eb5 GM |
1520 | needed, it is taken from that list. During the sweep phase of GC, |
1521 | string_blocks that are entirely free are freed, except two which | |
1522 | we keep. | |
7146af97 | 1523 | |
2e471eb5 GM |
1524 | String data is allocated from sblock structures. Strings larger |
1525 | than LARGE_STRING_BYTES, get their own sblock, data for smaller | |
1526 | strings is sub-allocated out of sblocks of size SBLOCK_SIZE. | |
7146af97 | 1527 | |
2e471eb5 GM |
1528 | Sblocks consist internally of sdata structures, one for each |
1529 | Lisp_String. The sdata structure points to the Lisp_String it | |
1530 | belongs to. The Lisp_String points back to the `u.data' member of | |
1531 | its sdata structure. | |
7146af97 | 1532 | |
2e471eb5 GM |
1533 | When a Lisp_String is freed during GC, it is put back on |
1534 | string_free_list, and its `data' member and its sdata's `string' | |
1535 | pointer is set to null. The size of the string is recorded in the | |
1536 | `u.nbytes' member of the sdata. So, sdata structures that are no | |
1537 | longer used, can be easily recognized, and it's easy to compact the | |
1538 | sblocks of small strings which we do in compact_small_strings. */ | |
7146af97 | 1539 | |
2e471eb5 GM |
1540 | /* Size in bytes of an sblock structure used for small strings. This |
1541 | is 8192 minus malloc overhead. */ | |
7146af97 | 1542 | |
2e471eb5 | 1543 | #define SBLOCK_SIZE 8188 |
c8099634 | 1544 | |
2e471eb5 GM |
1545 | /* Strings larger than this are considered large strings. String data |
1546 | for large strings is allocated from individual sblocks. */ | |
7146af97 | 1547 | |
2e471eb5 GM |
1548 | #define LARGE_STRING_BYTES 1024 |
1549 | ||
1550 | /* Structure describing string memory sub-allocated from an sblock. | |
1551 | This is where the contents of Lisp strings are stored. */ | |
1552 | ||
1553 | struct sdata | |
7146af97 | 1554 | { |
2e471eb5 GM |
1555 | /* Back-pointer to the string this sdata belongs to. If null, this |
1556 | structure is free, and the NBYTES member of the union below | |
34400008 | 1557 | contains the string's byte size (the same value that STRING_BYTES |
2e471eb5 GM |
1558 | would return if STRING were non-null). If non-null, STRING_BYTES |
1559 | (STRING) is the size of the data, and DATA contains the string's | |
1560 | contents. */ | |
1561 | struct Lisp_String *string; | |
7146af97 | 1562 | |
31d929e5 | 1563 | #ifdef GC_CHECK_STRING_BYTES |
177c0ea7 | 1564 | |
31d929e5 GM |
1565 | EMACS_INT nbytes; |
1566 | unsigned char data[1]; | |
177c0ea7 | 1567 | |
31d929e5 GM |
1568 | #define SDATA_NBYTES(S) (S)->nbytes |
1569 | #define SDATA_DATA(S) (S)->data | |
177c0ea7 | 1570 | |
31d929e5 GM |
1571 | #else /* not GC_CHECK_STRING_BYTES */ |
1572 | ||
2e471eb5 GM |
1573 | union |
1574 | { | |
1575 | /* When STRING in non-null. */ | |
1576 | unsigned char data[1]; | |
1577 | ||
1578 | /* When STRING is null. */ | |
1579 | EMACS_INT nbytes; | |
1580 | } u; | |
177c0ea7 | 1581 | |
31d929e5 GM |
1582 | |
1583 | #define SDATA_NBYTES(S) (S)->u.nbytes | |
1584 | #define SDATA_DATA(S) (S)->u.data | |
1585 | ||
1586 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 GM |
1587 | }; |
1588 | ||
31d929e5 | 1589 | |
2e471eb5 GM |
1590 | /* Structure describing a block of memory which is sub-allocated to |
1591 | obtain string data memory for strings. Blocks for small strings | |
1592 | are of fixed size SBLOCK_SIZE. Blocks for large strings are made | |
1593 | as large as needed. */ | |
1594 | ||
1595 | struct sblock | |
7146af97 | 1596 | { |
2e471eb5 GM |
1597 | /* Next in list. */ |
1598 | struct sblock *next; | |
7146af97 | 1599 | |
2e471eb5 GM |
1600 | /* Pointer to the next free sdata block. This points past the end |
1601 | of the sblock if there isn't any space left in this block. */ | |
1602 | struct sdata *next_free; | |
1603 | ||
1604 | /* Start of data. */ | |
1605 | struct sdata first_data; | |
1606 | }; | |
1607 | ||
1608 | /* Number of Lisp strings in a string_block structure. The 1020 is | |
1609 | 1024 minus malloc overhead. */ | |
1610 | ||
19bcad1f | 1611 | #define STRING_BLOCK_SIZE \ |
2e471eb5 GM |
1612 | ((1020 - sizeof (struct string_block *)) / sizeof (struct Lisp_String)) |
1613 | ||
1614 | /* Structure describing a block from which Lisp_String structures | |
1615 | are allocated. */ | |
1616 | ||
1617 | struct string_block | |
7146af97 | 1618 | { |
d05b383a | 1619 | /* Place `strings' first, to preserve alignment. */ |
19bcad1f | 1620 | struct Lisp_String strings[STRING_BLOCK_SIZE]; |
d05b383a | 1621 | struct string_block *next; |
2e471eb5 | 1622 | }; |
7146af97 | 1623 | |
2e471eb5 GM |
1624 | /* Head and tail of the list of sblock structures holding Lisp string |
1625 | data. We always allocate from current_sblock. The NEXT pointers | |
1626 | in the sblock structures go from oldest_sblock to current_sblock. */ | |
3c06d205 | 1627 | |
2e471eb5 | 1628 | static struct sblock *oldest_sblock, *current_sblock; |
7146af97 | 1629 | |
2e471eb5 | 1630 | /* List of sblocks for large strings. */ |
7146af97 | 1631 | |
2e471eb5 | 1632 | static struct sblock *large_sblocks; |
7146af97 | 1633 | |
2e471eb5 | 1634 | /* List of string_block structures, and how many there are. */ |
7146af97 | 1635 | |
2e471eb5 GM |
1636 | static struct string_block *string_blocks; |
1637 | static int n_string_blocks; | |
7146af97 | 1638 | |
2e471eb5 | 1639 | /* Free-list of Lisp_Strings. */ |
7146af97 | 1640 | |
2e471eb5 | 1641 | static struct Lisp_String *string_free_list; |
7146af97 | 1642 | |
2e471eb5 | 1643 | /* Number of live and free Lisp_Strings. */ |
c8099634 | 1644 | |
2e471eb5 | 1645 | static int total_strings, total_free_strings; |
7146af97 | 1646 | |
2e471eb5 GM |
1647 | /* Number of bytes used by live strings. */ |
1648 | ||
1649 | static int total_string_size; | |
1650 | ||
1651 | /* Given a pointer to a Lisp_String S which is on the free-list | |
1652 | string_free_list, return a pointer to its successor in the | |
1653 | free-list. */ | |
1654 | ||
1655 | #define NEXT_FREE_LISP_STRING(S) (*(struct Lisp_String **) (S)) | |
1656 | ||
1657 | /* Return a pointer to the sdata structure belonging to Lisp string S. | |
1658 | S must be live, i.e. S->data must not be null. S->data is actually | |
1659 | a pointer to the `u.data' member of its sdata structure; the | |
1660 | structure starts at a constant offset in front of that. */ | |
177c0ea7 | 1661 | |
31d929e5 GM |
1662 | #ifdef GC_CHECK_STRING_BYTES |
1663 | ||
1664 | #define SDATA_OF_STRING(S) \ | |
1665 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *) \ | |
1666 | - sizeof (EMACS_INT))) | |
1667 | ||
1668 | #else /* not GC_CHECK_STRING_BYTES */ | |
1669 | ||
2e471eb5 GM |
1670 | #define SDATA_OF_STRING(S) \ |
1671 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *))) | |
1672 | ||
31d929e5 GM |
1673 | #endif /* not GC_CHECK_STRING_BYTES */ |
1674 | ||
212f33f1 KS |
1675 | |
1676 | #ifdef GC_CHECK_STRING_OVERRUN | |
bdbed949 KS |
1677 | |
1678 | /* We check for overrun in string data blocks by appending a small | |
1679 | "cookie" after each allocated string data block, and check for the | |
1680 | presense of this cookie during GC. */ | |
1681 | ||
1682 | #define GC_STRING_OVERRUN_COOKIE_SIZE 4 | |
1683 | static char string_overrun_cookie[GC_STRING_OVERRUN_COOKIE_SIZE] = | |
1684 | { 0xde, 0xad, 0xbe, 0xef }; | |
1685 | ||
212f33f1 | 1686 | #else |
bdbed949 | 1687 | #define GC_STRING_OVERRUN_COOKIE_SIZE 0 |
212f33f1 KS |
1688 | #endif |
1689 | ||
2e471eb5 GM |
1690 | /* Value is the size of an sdata structure large enough to hold NBYTES |
1691 | bytes of string data. The value returned includes a terminating | |
1692 | NUL byte, the size of the sdata structure, and padding. */ | |
1693 | ||
31d929e5 GM |
1694 | #ifdef GC_CHECK_STRING_BYTES |
1695 | ||
2e471eb5 GM |
1696 | #define SDATA_SIZE(NBYTES) \ |
1697 | ((sizeof (struct Lisp_String *) \ | |
1698 | + (NBYTES) + 1 \ | |
31d929e5 | 1699 | + sizeof (EMACS_INT) \ |
2e471eb5 GM |
1700 | + sizeof (EMACS_INT) - 1) \ |
1701 | & ~(sizeof (EMACS_INT) - 1)) | |
1702 | ||
31d929e5 GM |
1703 | #else /* not GC_CHECK_STRING_BYTES */ |
1704 | ||
1705 | #define SDATA_SIZE(NBYTES) \ | |
1706 | ((sizeof (struct Lisp_String *) \ | |
1707 | + (NBYTES) + 1 \ | |
1708 | + sizeof (EMACS_INT) - 1) \ | |
1709 | & ~(sizeof (EMACS_INT) - 1)) | |
1710 | ||
1711 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 | 1712 | |
bdbed949 KS |
1713 | /* Extra bytes to allocate for each string. */ |
1714 | ||
1715 | #define GC_STRING_EXTRA (GC_STRING_OVERRUN_COOKIE_SIZE) | |
1716 | ||
2e471eb5 | 1717 | /* Initialize string allocation. Called from init_alloc_once. */ |
d457598b AS |
1718 | |
1719 | void | |
2e471eb5 | 1720 | init_strings () |
7146af97 | 1721 | { |
2e471eb5 GM |
1722 | total_strings = total_free_strings = total_string_size = 0; |
1723 | oldest_sblock = current_sblock = large_sblocks = NULL; | |
1724 | string_blocks = NULL; | |
1725 | n_string_blocks = 0; | |
1726 | string_free_list = NULL; | |
7146af97 JB |
1727 | } |
1728 | ||
2e471eb5 | 1729 | |
361b097f GM |
1730 | #ifdef GC_CHECK_STRING_BYTES |
1731 | ||
361b097f GM |
1732 | static int check_string_bytes_count; |
1733 | ||
676a7251 GM |
1734 | void check_string_bytes P_ ((int)); |
1735 | void check_sblock P_ ((struct sblock *)); | |
1736 | ||
1737 | #define CHECK_STRING_BYTES(S) STRING_BYTES (S) | |
1738 | ||
1739 | ||
1740 | /* Like GC_STRING_BYTES, but with debugging check. */ | |
1741 | ||
1742 | int | |
1743 | string_bytes (s) | |
1744 | struct Lisp_String *s; | |
1745 | { | |
7cdee936 | 1746 | int nbytes = (s->size_byte < 0 ? s->size & ~ARRAY_MARK_FLAG : s->size_byte); |
676a7251 GM |
1747 | if (!PURE_POINTER_P (s) |
1748 | && s->data | |
1749 | && nbytes != SDATA_NBYTES (SDATA_OF_STRING (s))) | |
1750 | abort (); | |
1751 | return nbytes; | |
1752 | } | |
177c0ea7 | 1753 | |
2c5bd608 | 1754 | /* Check validity of Lisp strings' string_bytes member in B. */ |
676a7251 | 1755 | |
361b097f | 1756 | void |
676a7251 GM |
1757 | check_sblock (b) |
1758 | struct sblock *b; | |
361b097f | 1759 | { |
676a7251 | 1760 | struct sdata *from, *end, *from_end; |
177c0ea7 | 1761 | |
676a7251 | 1762 | end = b->next_free; |
177c0ea7 | 1763 | |
676a7251 | 1764 | for (from = &b->first_data; from < end; from = from_end) |
361b097f | 1765 | { |
676a7251 GM |
1766 | /* Compute the next FROM here because copying below may |
1767 | overwrite data we need to compute it. */ | |
1768 | int nbytes; | |
177c0ea7 | 1769 | |
676a7251 GM |
1770 | /* Check that the string size recorded in the string is the |
1771 | same as the one recorded in the sdata structure. */ | |
1772 | if (from->string) | |
1773 | CHECK_STRING_BYTES (from->string); | |
177c0ea7 | 1774 | |
676a7251 GM |
1775 | if (from->string) |
1776 | nbytes = GC_STRING_BYTES (from->string); | |
1777 | else | |
1778 | nbytes = SDATA_NBYTES (from); | |
177c0ea7 | 1779 | |
676a7251 | 1780 | nbytes = SDATA_SIZE (nbytes); |
212f33f1 | 1781 | from_end = (struct sdata *) ((char *) from + nbytes + GC_STRING_EXTRA); |
676a7251 GM |
1782 | } |
1783 | } | |
361b097f | 1784 | |
676a7251 GM |
1785 | |
1786 | /* Check validity of Lisp strings' string_bytes member. ALL_P | |
1787 | non-zero means check all strings, otherwise check only most | |
1788 | recently allocated strings. Used for hunting a bug. */ | |
1789 | ||
1790 | void | |
1791 | check_string_bytes (all_p) | |
1792 | int all_p; | |
1793 | { | |
1794 | if (all_p) | |
1795 | { | |
1796 | struct sblock *b; | |
1797 | ||
1798 | for (b = large_sblocks; b; b = b->next) | |
1799 | { | |
1800 | struct Lisp_String *s = b->first_data.string; | |
1801 | if (s) | |
1802 | CHECK_STRING_BYTES (s); | |
361b097f | 1803 | } |
177c0ea7 | 1804 | |
676a7251 GM |
1805 | for (b = oldest_sblock; b; b = b->next) |
1806 | check_sblock (b); | |
361b097f | 1807 | } |
676a7251 GM |
1808 | else |
1809 | check_sblock (current_sblock); | |
361b097f GM |
1810 | } |
1811 | ||
1812 | #endif /* GC_CHECK_STRING_BYTES */ | |
1813 | ||
212f33f1 KS |
1814 | #ifdef GC_CHECK_STRING_FREE_LIST |
1815 | ||
bdbed949 KS |
1816 | /* Walk through the string free list looking for bogus next pointers. |
1817 | This may catch buffer overrun from a previous string. */ | |
1818 | ||
212f33f1 KS |
1819 | static void |
1820 | check_string_free_list () | |
1821 | { | |
1822 | struct Lisp_String *s; | |
1823 | ||
1824 | /* Pop a Lisp_String off the free-list. */ | |
1825 | s = string_free_list; | |
1826 | while (s != NULL) | |
1827 | { | |
1828 | if ((unsigned)s < 1024) | |
1829 | abort(); | |
1830 | s = NEXT_FREE_LISP_STRING (s); | |
1831 | } | |
1832 | } | |
1833 | #else | |
1834 | #define check_string_free_list() | |
1835 | #endif | |
361b097f | 1836 | |
2e471eb5 GM |
1837 | /* Return a new Lisp_String. */ |
1838 | ||
1839 | static struct Lisp_String * | |
1840 | allocate_string () | |
7146af97 | 1841 | { |
2e471eb5 | 1842 | struct Lisp_String *s; |
7146af97 | 1843 | |
2e471eb5 GM |
1844 | /* If the free-list is empty, allocate a new string_block, and |
1845 | add all the Lisp_Strings in it to the free-list. */ | |
1846 | if (string_free_list == NULL) | |
7146af97 | 1847 | { |
2e471eb5 GM |
1848 | struct string_block *b; |
1849 | int i; | |
1850 | ||
34400008 | 1851 | b = (struct string_block *) lisp_malloc (sizeof *b, MEM_TYPE_STRING); |
2e471eb5 GM |
1852 | bzero (b, sizeof *b); |
1853 | b->next = string_blocks; | |
1854 | string_blocks = b; | |
1855 | ++n_string_blocks; | |
1856 | ||
19bcad1f | 1857 | for (i = STRING_BLOCK_SIZE - 1; i >= 0; --i) |
7146af97 | 1858 | { |
2e471eb5 GM |
1859 | s = b->strings + i; |
1860 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1861 | string_free_list = s; | |
7146af97 | 1862 | } |
2e471eb5 | 1863 | |
19bcad1f | 1864 | total_free_strings += STRING_BLOCK_SIZE; |
7146af97 | 1865 | } |
c0f51373 | 1866 | |
bdbed949 | 1867 | check_string_free_list (); |
212f33f1 | 1868 | |
2e471eb5 GM |
1869 | /* Pop a Lisp_String off the free-list. */ |
1870 | s = string_free_list; | |
1871 | string_free_list = NEXT_FREE_LISP_STRING (s); | |
c0f51373 | 1872 | |
2e471eb5 GM |
1873 | /* Probably not strictly necessary, but play it safe. */ |
1874 | bzero (s, sizeof *s); | |
c0f51373 | 1875 | |
2e471eb5 GM |
1876 | --total_free_strings; |
1877 | ++total_strings; | |
1878 | ++strings_consed; | |
1879 | consing_since_gc += sizeof *s; | |
c0f51373 | 1880 | |
361b097f | 1881 | #ifdef GC_CHECK_STRING_BYTES |
83a96b4d | 1882 | if (!noninteractive |
e0f712ba | 1883 | #ifdef MAC_OS8 |
83a96b4d AC |
1884 | && current_sblock |
1885 | #endif | |
1886 | ) | |
361b097f | 1887 | { |
676a7251 GM |
1888 | if (++check_string_bytes_count == 200) |
1889 | { | |
1890 | check_string_bytes_count = 0; | |
1891 | check_string_bytes (1); | |
1892 | } | |
1893 | else | |
1894 | check_string_bytes (0); | |
361b097f | 1895 | } |
676a7251 | 1896 | #endif /* GC_CHECK_STRING_BYTES */ |
361b097f | 1897 | |
2e471eb5 | 1898 | return s; |
c0f51373 | 1899 | } |
7146af97 | 1900 | |
7146af97 | 1901 | |
2e471eb5 GM |
1902 | /* Set up Lisp_String S for holding NCHARS characters, NBYTES bytes, |
1903 | plus a NUL byte at the end. Allocate an sdata structure for S, and | |
1904 | set S->data to its `u.data' member. Store a NUL byte at the end of | |
1905 | S->data. Set S->size to NCHARS and S->size_byte to NBYTES. Free | |
1906 | S->data if it was initially non-null. */ | |
7146af97 | 1907 | |
2e471eb5 GM |
1908 | void |
1909 | allocate_string_data (s, nchars, nbytes) | |
1910 | struct Lisp_String *s; | |
1911 | int nchars, nbytes; | |
7146af97 | 1912 | { |
5c5fecb3 | 1913 | struct sdata *data, *old_data; |
2e471eb5 | 1914 | struct sblock *b; |
5c5fecb3 | 1915 | int needed, old_nbytes; |
7146af97 | 1916 | |
2e471eb5 GM |
1917 | /* Determine the number of bytes needed to store NBYTES bytes |
1918 | of string data. */ | |
1919 | needed = SDATA_SIZE (nbytes); | |
7146af97 | 1920 | |
2e471eb5 GM |
1921 | if (nbytes > LARGE_STRING_BYTES) |
1922 | { | |
675d5130 | 1923 | size_t size = sizeof *b - sizeof (struct sdata) + needed; |
2e471eb5 GM |
1924 | |
1925 | #ifdef DOUG_LEA_MALLOC | |
f8608968 GM |
1926 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
1927 | because mapped region contents are not preserved in | |
d36b182f DL |
1928 | a dumped Emacs. |
1929 | ||
1930 | In case you think of allowing it in a dumped Emacs at the | |
1931 | cost of not being able to re-dump, there's another reason: | |
1932 | mmap'ed data typically have an address towards the top of the | |
1933 | address space, which won't fit into an EMACS_INT (at least on | |
1934 | 32-bit systems with the current tagging scheme). --fx */ | |
2e471eb5 GM |
1935 | mallopt (M_MMAP_MAX, 0); |
1936 | #endif | |
1937 | ||
212f33f1 | 1938 | b = (struct sblock *) lisp_malloc (size + GC_STRING_EXTRA, MEM_TYPE_NON_LISP); |
177c0ea7 | 1939 | |
2e471eb5 GM |
1940 | #ifdef DOUG_LEA_MALLOC |
1941 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
1942 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
1943 | #endif | |
177c0ea7 | 1944 | |
2e471eb5 GM |
1945 | b->next_free = &b->first_data; |
1946 | b->first_data.string = NULL; | |
1947 | b->next = large_sblocks; | |
1948 | large_sblocks = b; | |
1949 | } | |
1950 | else if (current_sblock == NULL | |
1951 | || (((char *) current_sblock + SBLOCK_SIZE | |
1952 | - (char *) current_sblock->next_free) | |
212f33f1 | 1953 | < (needed + GC_STRING_EXTRA))) |
2e471eb5 GM |
1954 | { |
1955 | /* Not enough room in the current sblock. */ | |
34400008 | 1956 | b = (struct sblock *) lisp_malloc (SBLOCK_SIZE, MEM_TYPE_NON_LISP); |
2e471eb5 GM |
1957 | b->next_free = &b->first_data; |
1958 | b->first_data.string = NULL; | |
1959 | b->next = NULL; | |
1960 | ||
1961 | if (current_sblock) | |
1962 | current_sblock->next = b; | |
1963 | else | |
1964 | oldest_sblock = b; | |
1965 | current_sblock = b; | |
1966 | } | |
1967 | else | |
1968 | b = current_sblock; | |
5c5fecb3 GM |
1969 | |
1970 | old_data = s->data ? SDATA_OF_STRING (s) : NULL; | |
1971 | old_nbytes = GC_STRING_BYTES (s); | |
177c0ea7 | 1972 | |
2e471eb5 GM |
1973 | data = b->next_free; |
1974 | data->string = s; | |
31d929e5 GM |
1975 | s->data = SDATA_DATA (data); |
1976 | #ifdef GC_CHECK_STRING_BYTES | |
1977 | SDATA_NBYTES (data) = nbytes; | |
1978 | #endif | |
2e471eb5 GM |
1979 | s->size = nchars; |
1980 | s->size_byte = nbytes; | |
1981 | s->data[nbytes] = '\0'; | |
212f33f1 | 1982 | #ifdef GC_CHECK_STRING_OVERRUN |
bdbed949 KS |
1983 | bcopy (string_overrun_cookie, (char *) data + needed, |
1984 | GC_STRING_OVERRUN_COOKIE_SIZE); | |
212f33f1 KS |
1985 | #endif |
1986 | b->next_free = (struct sdata *) ((char *) data + needed + GC_STRING_EXTRA); | |
177c0ea7 | 1987 | |
5c5fecb3 GM |
1988 | /* If S had already data assigned, mark that as free by setting its |
1989 | string back-pointer to null, and recording the size of the data | |
00c9c33c | 1990 | in it. */ |
5c5fecb3 GM |
1991 | if (old_data) |
1992 | { | |
31d929e5 | 1993 | SDATA_NBYTES (old_data) = old_nbytes; |
5c5fecb3 GM |
1994 | old_data->string = NULL; |
1995 | } | |
1996 | ||
2e471eb5 GM |
1997 | consing_since_gc += needed; |
1998 | } | |
1999 | ||
2000 | ||
2001 | /* Sweep and compact strings. */ | |
2002 | ||
2003 | static void | |
2004 | sweep_strings () | |
2005 | { | |
2006 | struct string_block *b, *next; | |
2007 | struct string_block *live_blocks = NULL; | |
177c0ea7 | 2008 | |
2e471eb5 GM |
2009 | string_free_list = NULL; |
2010 | total_strings = total_free_strings = 0; | |
2011 | total_string_size = 0; | |
2012 | ||
2013 | /* Scan strings_blocks, free Lisp_Strings that aren't marked. */ | |
2014 | for (b = string_blocks; b; b = next) | |
2015 | { | |
2016 | int i, nfree = 0; | |
2017 | struct Lisp_String *free_list_before = string_free_list; | |
2018 | ||
2019 | next = b->next; | |
2020 | ||
19bcad1f | 2021 | for (i = 0; i < STRING_BLOCK_SIZE; ++i) |
2e471eb5 GM |
2022 | { |
2023 | struct Lisp_String *s = b->strings + i; | |
2024 | ||
2025 | if (s->data) | |
2026 | { | |
2027 | /* String was not on free-list before. */ | |
2028 | if (STRING_MARKED_P (s)) | |
2029 | { | |
2030 | /* String is live; unmark it and its intervals. */ | |
2031 | UNMARK_STRING (s); | |
177c0ea7 | 2032 | |
2e471eb5 GM |
2033 | if (!NULL_INTERVAL_P (s->intervals)) |
2034 | UNMARK_BALANCE_INTERVALS (s->intervals); | |
2035 | ||
2036 | ++total_strings; | |
2037 | total_string_size += STRING_BYTES (s); | |
2038 | } | |
2039 | else | |
2040 | { | |
2041 | /* String is dead. Put it on the free-list. */ | |
2042 | struct sdata *data = SDATA_OF_STRING (s); | |
2043 | ||
2044 | /* Save the size of S in its sdata so that we know | |
2045 | how large that is. Reset the sdata's string | |
2046 | back-pointer so that we know it's free. */ | |
31d929e5 GM |
2047 | #ifdef GC_CHECK_STRING_BYTES |
2048 | if (GC_STRING_BYTES (s) != SDATA_NBYTES (data)) | |
2049 | abort (); | |
2050 | #else | |
2e471eb5 | 2051 | data->u.nbytes = GC_STRING_BYTES (s); |
31d929e5 | 2052 | #endif |
2e471eb5 GM |
2053 | data->string = NULL; |
2054 | ||
2055 | /* Reset the strings's `data' member so that we | |
2056 | know it's free. */ | |
2057 | s->data = NULL; | |
2058 | ||
2059 | /* Put the string on the free-list. */ | |
2060 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
2061 | string_free_list = s; | |
2062 | ++nfree; | |
2063 | } | |
2064 | } | |
2065 | else | |
2066 | { | |
2067 | /* S was on the free-list before. Put it there again. */ | |
2068 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
2069 | string_free_list = s; | |
2070 | ++nfree; | |
2071 | } | |
2072 | } | |
2073 | ||
34400008 | 2074 | /* Free blocks that contain free Lisp_Strings only, except |
2e471eb5 | 2075 | the first two of them. */ |
19bcad1f SM |
2076 | if (nfree == STRING_BLOCK_SIZE |
2077 | && total_free_strings > STRING_BLOCK_SIZE) | |
2e471eb5 GM |
2078 | { |
2079 | lisp_free (b); | |
2080 | --n_string_blocks; | |
2081 | string_free_list = free_list_before; | |
2082 | } | |
2083 | else | |
2084 | { | |
2085 | total_free_strings += nfree; | |
2086 | b->next = live_blocks; | |
2087 | live_blocks = b; | |
2088 | } | |
2089 | } | |
2090 | ||
bdbed949 | 2091 | check_string_free_list (); |
212f33f1 | 2092 | |
2e471eb5 GM |
2093 | string_blocks = live_blocks; |
2094 | free_large_strings (); | |
2095 | compact_small_strings (); | |
212f33f1 | 2096 | |
bdbed949 | 2097 | check_string_free_list (); |
2e471eb5 GM |
2098 | } |
2099 | ||
2100 | ||
2101 | /* Free dead large strings. */ | |
2102 | ||
2103 | static void | |
2104 | free_large_strings () | |
2105 | { | |
2106 | struct sblock *b, *next; | |
2107 | struct sblock *live_blocks = NULL; | |
177c0ea7 | 2108 | |
2e471eb5 GM |
2109 | for (b = large_sblocks; b; b = next) |
2110 | { | |
2111 | next = b->next; | |
2112 | ||
2113 | if (b->first_data.string == NULL) | |
2114 | lisp_free (b); | |
2115 | else | |
2116 | { | |
2117 | b->next = live_blocks; | |
2118 | live_blocks = b; | |
2119 | } | |
2120 | } | |
2121 | ||
2122 | large_sblocks = live_blocks; | |
2123 | } | |
2124 | ||
2125 | ||
2126 | /* Compact data of small strings. Free sblocks that don't contain | |
2127 | data of live strings after compaction. */ | |
2128 | ||
2129 | static void | |
2130 | compact_small_strings () | |
2131 | { | |
2132 | struct sblock *b, *tb, *next; | |
2133 | struct sdata *from, *to, *end, *tb_end; | |
2134 | struct sdata *to_end, *from_end; | |
2135 | ||
2136 | /* TB is the sblock we copy to, TO is the sdata within TB we copy | |
2137 | to, and TB_END is the end of TB. */ | |
2138 | tb = oldest_sblock; | |
2139 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
2140 | to = &tb->first_data; | |
2141 | ||
2142 | /* Step through the blocks from the oldest to the youngest. We | |
2143 | expect that old blocks will stabilize over time, so that less | |
2144 | copying will happen this way. */ | |
2145 | for (b = oldest_sblock; b; b = b->next) | |
2146 | { | |
2147 | end = b->next_free; | |
2148 | xassert ((char *) end <= (char *) b + SBLOCK_SIZE); | |
177c0ea7 | 2149 | |
2e471eb5 GM |
2150 | for (from = &b->first_data; from < end; from = from_end) |
2151 | { | |
2152 | /* Compute the next FROM here because copying below may | |
2153 | overwrite data we need to compute it. */ | |
2154 | int nbytes; | |
2155 | ||
31d929e5 GM |
2156 | #ifdef GC_CHECK_STRING_BYTES |
2157 | /* Check that the string size recorded in the string is the | |
2158 | same as the one recorded in the sdata structure. */ | |
2159 | if (from->string | |
2160 | && GC_STRING_BYTES (from->string) != SDATA_NBYTES (from)) | |
2161 | abort (); | |
2162 | #endif /* GC_CHECK_STRING_BYTES */ | |
177c0ea7 | 2163 | |
2e471eb5 GM |
2164 | if (from->string) |
2165 | nbytes = GC_STRING_BYTES (from->string); | |
2166 | else | |
31d929e5 | 2167 | nbytes = SDATA_NBYTES (from); |
177c0ea7 | 2168 | |
212f33f1 KS |
2169 | if (nbytes > LARGE_STRING_BYTES) |
2170 | abort (); | |
212f33f1 | 2171 | |
2e471eb5 | 2172 | nbytes = SDATA_SIZE (nbytes); |
212f33f1 KS |
2173 | from_end = (struct sdata *) ((char *) from + nbytes + GC_STRING_EXTRA); |
2174 | ||
2175 | #ifdef GC_CHECK_STRING_OVERRUN | |
bdbed949 KS |
2176 | if (bcmp (string_overrun_cookie, |
2177 | ((char *) from_end) - GC_STRING_OVERRUN_COOKIE_SIZE, | |
2178 | GC_STRING_OVERRUN_COOKIE_SIZE)) | |
212f33f1 KS |
2179 | abort (); |
2180 | #endif | |
177c0ea7 | 2181 | |
2e471eb5 GM |
2182 | /* FROM->string non-null means it's alive. Copy its data. */ |
2183 | if (from->string) | |
2184 | { | |
2185 | /* If TB is full, proceed with the next sblock. */ | |
212f33f1 | 2186 | to_end = (struct sdata *) ((char *) to + nbytes + GC_STRING_EXTRA); |
2e471eb5 GM |
2187 | if (to_end > tb_end) |
2188 | { | |
2189 | tb->next_free = to; | |
2190 | tb = tb->next; | |
2191 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
2192 | to = &tb->first_data; | |
212f33f1 | 2193 | to_end = (struct sdata *) ((char *) to + nbytes + GC_STRING_EXTRA); |
2e471eb5 | 2194 | } |
177c0ea7 | 2195 | |
2e471eb5 GM |
2196 | /* Copy, and update the string's `data' pointer. */ |
2197 | if (from != to) | |
2198 | { | |
a2407477 | 2199 | xassert (tb != b || to <= from); |
212f33f1 | 2200 | safe_bcopy ((char *) from, (char *) to, nbytes + GC_STRING_EXTRA); |
31d929e5 | 2201 | to->string->data = SDATA_DATA (to); |
2e471eb5 GM |
2202 | } |
2203 | ||
2204 | /* Advance past the sdata we copied to. */ | |
2205 | to = to_end; | |
2206 | } | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | /* The rest of the sblocks following TB don't contain live data, so | |
2211 | we can free them. */ | |
2212 | for (b = tb->next; b; b = next) | |
2213 | { | |
2214 | next = b->next; | |
2215 | lisp_free (b); | |
2216 | } | |
2217 | ||
2218 | tb->next_free = to; | |
2219 | tb->next = NULL; | |
2220 | current_sblock = tb; | |
2221 | } | |
2222 | ||
2223 | ||
2224 | DEFUN ("make-string", Fmake_string, Smake_string, 2, 2, 0, | |
69623621 RS |
2225 | doc: /* Return a newly created string of length LENGTH, with INIT in each element. |
2226 | LENGTH must be an integer. | |
2227 | INIT must be an integer that represents a character. */) | |
7ee72033 | 2228 | (length, init) |
2e471eb5 GM |
2229 | Lisp_Object length, init; |
2230 | { | |
2231 | register Lisp_Object val; | |
2232 | register unsigned char *p, *end; | |
2233 | int c, nbytes; | |
2234 | ||
b7826503 PJ |
2235 | CHECK_NATNUM (length); |
2236 | CHECK_NUMBER (init); | |
2e471eb5 GM |
2237 | |
2238 | c = XINT (init); | |
2239 | if (SINGLE_BYTE_CHAR_P (c)) | |
2240 | { | |
2241 | nbytes = XINT (length); | |
2242 | val = make_uninit_string (nbytes); | |
d5db4077 KR |
2243 | p = SDATA (val); |
2244 | end = p + SCHARS (val); | |
2e471eb5 GM |
2245 | while (p != end) |
2246 | *p++ = c; | |
2247 | } | |
2248 | else | |
2249 | { | |
d942b71c | 2250 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2e471eb5 GM |
2251 | int len = CHAR_STRING (c, str); |
2252 | ||
2253 | nbytes = len * XINT (length); | |
2254 | val = make_uninit_multibyte_string (XINT (length), nbytes); | |
d5db4077 | 2255 | p = SDATA (val); |
2e471eb5 GM |
2256 | end = p + nbytes; |
2257 | while (p != end) | |
2258 | { | |
2259 | bcopy (str, p, len); | |
2260 | p += len; | |
2261 | } | |
2262 | } | |
177c0ea7 | 2263 | |
2e471eb5 GM |
2264 | *p = 0; |
2265 | return val; | |
2266 | } | |
2267 | ||
2268 | ||
2269 | DEFUN ("make-bool-vector", Fmake_bool_vector, Smake_bool_vector, 2, 2, 0, | |
a6266d23 | 2270 | doc: /* Return a new bool-vector of length LENGTH, using INIT for as each element. |
7ee72033 MB |
2271 | LENGTH must be a number. INIT matters only in whether it is t or nil. */) |
2272 | (length, init) | |
2e471eb5 GM |
2273 | Lisp_Object length, init; |
2274 | { | |
2275 | register Lisp_Object val; | |
2276 | struct Lisp_Bool_Vector *p; | |
2277 | int real_init, i; | |
2278 | int length_in_chars, length_in_elts, bits_per_value; | |
2279 | ||
b7826503 | 2280 | CHECK_NATNUM (length); |
2e471eb5 | 2281 | |
a097329f | 2282 | bits_per_value = sizeof (EMACS_INT) * BOOL_VECTOR_BITS_PER_CHAR; |
2e471eb5 GM |
2283 | |
2284 | length_in_elts = (XFASTINT (length) + bits_per_value - 1) / bits_per_value; | |
a097329f AS |
2285 | length_in_chars = ((XFASTINT (length) + BOOL_VECTOR_BITS_PER_CHAR - 1) |
2286 | / BOOL_VECTOR_BITS_PER_CHAR); | |
2e471eb5 GM |
2287 | |
2288 | /* We must allocate one more elements than LENGTH_IN_ELTS for the | |
2289 | slot `size' of the struct Lisp_Bool_Vector. */ | |
2290 | val = Fmake_vector (make_number (length_in_elts + 1), Qnil); | |
2291 | p = XBOOL_VECTOR (val); | |
177c0ea7 | 2292 | |
2e471eb5 GM |
2293 | /* Get rid of any bits that would cause confusion. */ |
2294 | p->vector_size = 0; | |
2295 | XSETBOOL_VECTOR (val, p); | |
2296 | p->size = XFASTINT (length); | |
177c0ea7 | 2297 | |
2e471eb5 GM |
2298 | real_init = (NILP (init) ? 0 : -1); |
2299 | for (i = 0; i < length_in_chars ; i++) | |
2300 | p->data[i] = real_init; | |
177c0ea7 | 2301 | |
2e471eb5 | 2302 | /* Clear the extraneous bits in the last byte. */ |
a097329f | 2303 | if (XINT (length) != length_in_chars * BOOL_VECTOR_BITS_PER_CHAR) |
2e471eb5 | 2304 | XBOOL_VECTOR (val)->data[length_in_chars - 1] |
a097329f | 2305 | &= (1 << (XINT (length) % BOOL_VECTOR_BITS_PER_CHAR)) - 1; |
2e471eb5 GM |
2306 | |
2307 | return val; | |
2308 | } | |
2309 | ||
2310 | ||
2311 | /* Make a string from NBYTES bytes at CONTENTS, and compute the number | |
2312 | of characters from the contents. This string may be unibyte or | |
2313 | multibyte, depending on the contents. */ | |
2314 | ||
2315 | Lisp_Object | |
2316 | make_string (contents, nbytes) | |
943b873e | 2317 | const char *contents; |
2e471eb5 GM |
2318 | int nbytes; |
2319 | { | |
2320 | register Lisp_Object val; | |
9eac9d59 KH |
2321 | int nchars, multibyte_nbytes; |
2322 | ||
2323 | parse_str_as_multibyte (contents, nbytes, &nchars, &multibyte_nbytes); | |
9eac9d59 KH |
2324 | if (nbytes == nchars || nbytes != multibyte_nbytes) |
2325 | /* CONTENTS contains no multibyte sequences or contains an invalid | |
2326 | multibyte sequence. We must make unibyte string. */ | |
495a6df3 KH |
2327 | val = make_unibyte_string (contents, nbytes); |
2328 | else | |
2329 | val = make_multibyte_string (contents, nchars, nbytes); | |
2e471eb5 GM |
2330 | return val; |
2331 | } | |
2332 | ||
2333 | ||
2334 | /* Make an unibyte string from LENGTH bytes at CONTENTS. */ | |
2335 | ||
2336 | Lisp_Object | |
2337 | make_unibyte_string (contents, length) | |
943b873e | 2338 | const char *contents; |
2e471eb5 GM |
2339 | int length; |
2340 | { | |
2341 | register Lisp_Object val; | |
2342 | val = make_uninit_string (length); | |
d5db4077 KR |
2343 | bcopy (contents, SDATA (val), length); |
2344 | STRING_SET_UNIBYTE (val); | |
2e471eb5 GM |
2345 | return val; |
2346 | } | |
2347 | ||
2348 | ||
2349 | /* Make a multibyte string from NCHARS characters occupying NBYTES | |
2350 | bytes at CONTENTS. */ | |
2351 | ||
2352 | Lisp_Object | |
2353 | make_multibyte_string (contents, nchars, nbytes) | |
943b873e | 2354 | const char *contents; |
2e471eb5 GM |
2355 | int nchars, nbytes; |
2356 | { | |
2357 | register Lisp_Object val; | |
2358 | val = make_uninit_multibyte_string (nchars, nbytes); | |
d5db4077 | 2359 | bcopy (contents, SDATA (val), nbytes); |
2e471eb5 GM |
2360 | return val; |
2361 | } | |
2362 | ||
2363 | ||
2364 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
2365 | CONTENTS. It is a multibyte string if NBYTES != NCHARS. */ | |
2366 | ||
2367 | Lisp_Object | |
2368 | make_string_from_bytes (contents, nchars, nbytes) | |
fcbb914b | 2369 | const char *contents; |
2e471eb5 GM |
2370 | int nchars, nbytes; |
2371 | { | |
2372 | register Lisp_Object val; | |
2373 | val = make_uninit_multibyte_string (nchars, nbytes); | |
d5db4077 KR |
2374 | bcopy (contents, SDATA (val), nbytes); |
2375 | if (SBYTES (val) == SCHARS (val)) | |
2376 | STRING_SET_UNIBYTE (val); | |
2e471eb5 GM |
2377 | return val; |
2378 | } | |
2379 | ||
2380 | ||
2381 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
2382 | CONTENTS. The argument MULTIBYTE controls whether to label the | |
229b28c4 KH |
2383 | string as multibyte. If NCHARS is negative, it counts the number of |
2384 | characters by itself. */ | |
2e471eb5 GM |
2385 | |
2386 | Lisp_Object | |
2387 | make_specified_string (contents, nchars, nbytes, multibyte) | |
fcbb914b | 2388 | const char *contents; |
2e471eb5 GM |
2389 | int nchars, nbytes; |
2390 | int multibyte; | |
2391 | { | |
2392 | register Lisp_Object val; | |
229b28c4 KH |
2393 | |
2394 | if (nchars < 0) | |
2395 | { | |
2396 | if (multibyte) | |
2397 | nchars = multibyte_chars_in_text (contents, nbytes); | |
2398 | else | |
2399 | nchars = nbytes; | |
2400 | } | |
2e471eb5 | 2401 | val = make_uninit_multibyte_string (nchars, nbytes); |
d5db4077 | 2402 | bcopy (contents, SDATA (val), nbytes); |
2e471eb5 | 2403 | if (!multibyte) |
d5db4077 | 2404 | STRING_SET_UNIBYTE (val); |
2e471eb5 GM |
2405 | return val; |
2406 | } | |
2407 | ||
2408 | ||
2409 | /* Make a string from the data at STR, treating it as multibyte if the | |
2410 | data warrants. */ | |
2411 | ||
2412 | Lisp_Object | |
2413 | build_string (str) | |
943b873e | 2414 | const char *str; |
2e471eb5 GM |
2415 | { |
2416 | return make_string (str, strlen (str)); | |
2417 | } | |
2418 | ||
2419 | ||
2420 | /* Return an unibyte Lisp_String set up to hold LENGTH characters | |
2421 | occupying LENGTH bytes. */ | |
2422 | ||
2423 | Lisp_Object | |
2424 | make_uninit_string (length) | |
2425 | int length; | |
2426 | { | |
2427 | Lisp_Object val; | |
2428 | val = make_uninit_multibyte_string (length, length); | |
d5db4077 | 2429 | STRING_SET_UNIBYTE (val); |
2e471eb5 GM |
2430 | return val; |
2431 | } | |
2432 | ||
2433 | ||
2434 | /* Return a multibyte Lisp_String set up to hold NCHARS characters | |
2435 | which occupy NBYTES bytes. */ | |
2436 | ||
2437 | Lisp_Object | |
2438 | make_uninit_multibyte_string (nchars, nbytes) | |
2439 | int nchars, nbytes; | |
2440 | { | |
2441 | Lisp_Object string; | |
2442 | struct Lisp_String *s; | |
2443 | ||
2444 | if (nchars < 0) | |
2445 | abort (); | |
2446 | ||
2447 | s = allocate_string (); | |
2448 | allocate_string_data (s, nchars, nbytes); | |
2449 | XSETSTRING (string, s); | |
2450 | string_chars_consed += nbytes; | |
2451 | return string; | |
2452 | } | |
2453 | ||
2454 | ||
2455 | \f | |
2456 | /*********************************************************************** | |
2457 | Float Allocation | |
2458 | ***********************************************************************/ | |
2459 | ||
2e471eb5 GM |
2460 | /* We store float cells inside of float_blocks, allocating a new |
2461 | float_block with malloc whenever necessary. Float cells reclaimed | |
2462 | by GC are put on a free list to be reallocated before allocating | |
ab6780cd | 2463 | any new float cells from the latest float_block. */ |
2e471eb5 | 2464 | |
d05b383a SM |
2465 | #define FLOAT_BLOCK_SIZE \ |
2466 | (((BLOCK_BYTES - sizeof (struct float_block *) \ | |
2467 | /* The compiler might add padding at the end. */ \ | |
2468 | - (sizeof (struct Lisp_Float) - sizeof (int))) * CHAR_BIT) \ | |
ab6780cd SM |
2469 | / (sizeof (struct Lisp_Float) * CHAR_BIT + 1)) |
2470 | ||
2471 | #define GETMARKBIT(block,n) \ | |
2472 | (((block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2473 | >> ((n) % (sizeof(int) * CHAR_BIT))) \ | |
2474 | & 1) | |
2475 | ||
2476 | #define SETMARKBIT(block,n) \ | |
2477 | (block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2478 | |= 1 << ((n) % (sizeof(int) * CHAR_BIT)) | |
2479 | ||
2480 | #define UNSETMARKBIT(block,n) \ | |
2481 | (block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2482 | &= ~(1 << ((n) % (sizeof(int) * CHAR_BIT))) | |
2483 | ||
2484 | #define FLOAT_BLOCK(fptr) \ | |
2485 | ((struct float_block *)(((EMACS_UINT)(fptr)) & ~(BLOCK_ALIGN - 1))) | |
2486 | ||
2487 | #define FLOAT_INDEX(fptr) \ | |
2488 | ((((EMACS_UINT)(fptr)) & (BLOCK_ALIGN - 1)) / sizeof (struct Lisp_Float)) | |
2e471eb5 GM |
2489 | |
2490 | struct float_block | |
2491 | { | |
ab6780cd | 2492 | /* Place `floats' at the beginning, to ease up FLOAT_INDEX's job. */ |
2e471eb5 | 2493 | struct Lisp_Float floats[FLOAT_BLOCK_SIZE]; |
ab6780cd SM |
2494 | int gcmarkbits[1 + FLOAT_BLOCK_SIZE / (sizeof(int) * CHAR_BIT)]; |
2495 | struct float_block *next; | |
2e471eb5 GM |
2496 | }; |
2497 | ||
ab6780cd SM |
2498 | #define FLOAT_MARKED_P(fptr) \ |
2499 | GETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2500 | ||
2501 | #define FLOAT_MARK(fptr) \ | |
2502 | SETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2503 | ||
2504 | #define FLOAT_UNMARK(fptr) \ | |
2505 | UNSETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2506 | ||
34400008 GM |
2507 | /* Current float_block. */ |
2508 | ||
2e471eb5 | 2509 | struct float_block *float_block; |
34400008 GM |
2510 | |
2511 | /* Index of first unused Lisp_Float in the current float_block. */ | |
2512 | ||
2e471eb5 GM |
2513 | int float_block_index; |
2514 | ||
2515 | /* Total number of float blocks now in use. */ | |
2516 | ||
2517 | int n_float_blocks; | |
2518 | ||
34400008 GM |
2519 | /* Free-list of Lisp_Floats. */ |
2520 | ||
2e471eb5 GM |
2521 | struct Lisp_Float *float_free_list; |
2522 | ||
34400008 | 2523 | |
966533c9 | 2524 | /* Initialize float allocation. */ |
34400008 | 2525 | |
2e471eb5 GM |
2526 | void |
2527 | init_float () | |
2528 | { | |
08b7c2cb SM |
2529 | float_block = NULL; |
2530 | float_block_index = FLOAT_BLOCK_SIZE; /* Force alloc of new float_block. */ | |
2e471eb5 | 2531 | float_free_list = 0; |
08b7c2cb | 2532 | n_float_blocks = 0; |
2e471eb5 GM |
2533 | } |
2534 | ||
34400008 GM |
2535 | |
2536 | /* Explicitly free a float cell by putting it on the free-list. */ | |
2e471eb5 GM |
2537 | |
2538 | void | |
2539 | free_float (ptr) | |
2540 | struct Lisp_Float *ptr; | |
2541 | { | |
2542 | *(struct Lisp_Float **)&ptr->data = float_free_list; | |
2543 | float_free_list = ptr; | |
2544 | } | |
2545 | ||
34400008 GM |
2546 | |
2547 | /* Return a new float object with value FLOAT_VALUE. */ | |
2548 | ||
2e471eb5 GM |
2549 | Lisp_Object |
2550 | make_float (float_value) | |
2551 | double float_value; | |
2552 | { | |
2553 | register Lisp_Object val; | |
2554 | ||
2555 | if (float_free_list) | |
2556 | { | |
2557 | /* We use the data field for chaining the free list | |
2558 | so that we won't use the same field that has the mark bit. */ | |
2559 | XSETFLOAT (val, float_free_list); | |
2560 | float_free_list = *(struct Lisp_Float **)&float_free_list->data; | |
2561 | } | |
2562 | else | |
2563 | { | |
2564 | if (float_block_index == FLOAT_BLOCK_SIZE) | |
2565 | { | |
2566 | register struct float_block *new; | |
2567 | ||
ab6780cd SM |
2568 | new = (struct float_block *) lisp_align_malloc (sizeof *new, |
2569 | MEM_TYPE_FLOAT); | |
2e471eb5 | 2570 | new->next = float_block; |
a0668126 | 2571 | bzero ((char *) new->gcmarkbits, sizeof new->gcmarkbits); |
2e471eb5 GM |
2572 | float_block = new; |
2573 | float_block_index = 0; | |
2574 | n_float_blocks++; | |
2575 | } | |
a0668126 SM |
2576 | XSETFLOAT (val, &float_block->floats[float_block_index]); |
2577 | float_block_index++; | |
2e471eb5 | 2578 | } |
177c0ea7 | 2579 | |
2e471eb5 | 2580 | XFLOAT_DATA (val) = float_value; |
a0668126 | 2581 | eassert (!FLOAT_MARKED_P (XFLOAT (val))); |
2e471eb5 GM |
2582 | consing_since_gc += sizeof (struct Lisp_Float); |
2583 | floats_consed++; | |
2584 | return val; | |
2585 | } | |
2586 | ||
2e471eb5 GM |
2587 | |
2588 | \f | |
2589 | /*********************************************************************** | |
2590 | Cons Allocation | |
2591 | ***********************************************************************/ | |
2592 | ||
2593 | /* We store cons cells inside of cons_blocks, allocating a new | |
2594 | cons_block with malloc whenever necessary. Cons cells reclaimed by | |
2595 | GC are put on a free list to be reallocated before allocating | |
08b7c2cb | 2596 | any new cons cells from the latest cons_block. */ |
2e471eb5 GM |
2597 | |
2598 | #define CONS_BLOCK_SIZE \ | |
08b7c2cb SM |
2599 | (((BLOCK_BYTES - sizeof (struct cons_block *)) * CHAR_BIT) \ |
2600 | / (sizeof (struct Lisp_Cons) * CHAR_BIT + 1)) | |
2601 | ||
2602 | #define CONS_BLOCK(fptr) \ | |
2603 | ((struct cons_block *)(((EMACS_UINT)(fptr)) & ~(BLOCK_ALIGN - 1))) | |
2604 | ||
2605 | #define CONS_INDEX(fptr) \ | |
2606 | ((((EMACS_UINT)(fptr)) & (BLOCK_ALIGN - 1)) / sizeof (struct Lisp_Cons)) | |
2e471eb5 GM |
2607 | |
2608 | struct cons_block | |
2609 | { | |
08b7c2cb | 2610 | /* Place `conses' at the beginning, to ease up CONS_INDEX's job. */ |
2e471eb5 | 2611 | struct Lisp_Cons conses[CONS_BLOCK_SIZE]; |
08b7c2cb SM |
2612 | int gcmarkbits[1 + CONS_BLOCK_SIZE / (sizeof(int) * CHAR_BIT)]; |
2613 | struct cons_block *next; | |
2e471eb5 GM |
2614 | }; |
2615 | ||
08b7c2cb SM |
2616 | #define CONS_MARKED_P(fptr) \ |
2617 | GETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2618 | ||
2619 | #define CONS_MARK(fptr) \ | |
2620 | SETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2621 | ||
2622 | #define CONS_UNMARK(fptr) \ | |
2623 | UNSETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2624 | ||
34400008 GM |
2625 | /* Current cons_block. */ |
2626 | ||
2e471eb5 | 2627 | struct cons_block *cons_block; |
34400008 GM |
2628 | |
2629 | /* Index of first unused Lisp_Cons in the current block. */ | |
2630 | ||
2e471eb5 GM |
2631 | int cons_block_index; |
2632 | ||
34400008 GM |
2633 | /* Free-list of Lisp_Cons structures. */ |
2634 | ||
2e471eb5 GM |
2635 | struct Lisp_Cons *cons_free_list; |
2636 | ||
2637 | /* Total number of cons blocks now in use. */ | |
2638 | ||
2639 | int n_cons_blocks; | |
2640 | ||
34400008 GM |
2641 | |
2642 | /* Initialize cons allocation. */ | |
2643 | ||
2e471eb5 GM |
2644 | void |
2645 | init_cons () | |
2646 | { | |
08b7c2cb SM |
2647 | cons_block = NULL; |
2648 | cons_block_index = CONS_BLOCK_SIZE; /* Force alloc of new cons_block. */ | |
2e471eb5 | 2649 | cons_free_list = 0; |
08b7c2cb | 2650 | n_cons_blocks = 0; |
2e471eb5 GM |
2651 | } |
2652 | ||
34400008 GM |
2653 | |
2654 | /* Explicitly free a cons cell by putting it on the free-list. */ | |
2e471eb5 GM |
2655 | |
2656 | void | |
2657 | free_cons (ptr) | |
2658 | struct Lisp_Cons *ptr; | |
2659 | { | |
2660 | *(struct Lisp_Cons **)&ptr->cdr = cons_free_list; | |
34400008 GM |
2661 | #if GC_MARK_STACK |
2662 | ptr->car = Vdead; | |
2663 | #endif | |
2e471eb5 GM |
2664 | cons_free_list = ptr; |
2665 | } | |
2666 | ||
2667 | DEFUN ("cons", Fcons, Scons, 2, 2, 0, | |
a6266d23 | 2668 | doc: /* Create a new cons, give it CAR and CDR as components, and return it. */) |
7ee72033 | 2669 | (car, cdr) |
2e471eb5 GM |
2670 | Lisp_Object car, cdr; |
2671 | { | |
2672 | register Lisp_Object val; | |
2673 | ||
2674 | if (cons_free_list) | |
2675 | { | |
2676 | /* We use the cdr for chaining the free list | |
2677 | so that we won't use the same field that has the mark bit. */ | |
2678 | XSETCONS (val, cons_free_list); | |
2679 | cons_free_list = *(struct Lisp_Cons **)&cons_free_list->cdr; | |
2680 | } | |
2681 | else | |
2682 | { | |
2683 | if (cons_block_index == CONS_BLOCK_SIZE) | |
2684 | { | |
2685 | register struct cons_block *new; | |
08b7c2cb SM |
2686 | new = (struct cons_block *) lisp_align_malloc (sizeof *new, |
2687 | MEM_TYPE_CONS); | |
a0668126 | 2688 | bzero ((char *) new->gcmarkbits, sizeof new->gcmarkbits); |
2e471eb5 GM |
2689 | new->next = cons_block; |
2690 | cons_block = new; | |
2691 | cons_block_index = 0; | |
2692 | n_cons_blocks++; | |
2693 | } | |
a0668126 SM |
2694 | XSETCONS (val, &cons_block->conses[cons_block_index]); |
2695 | cons_block_index++; | |
2e471eb5 | 2696 | } |
177c0ea7 | 2697 | |
f3fbd155 KR |
2698 | XSETCAR (val, car); |
2699 | XSETCDR (val, cdr); | |
a0668126 | 2700 | eassert (!CONS_MARKED_P (XCONS (val))); |
2e471eb5 GM |
2701 | consing_since_gc += sizeof (struct Lisp_Cons); |
2702 | cons_cells_consed++; | |
2703 | return val; | |
2704 | } | |
2705 | ||
e3e56238 RS |
2706 | /* Get an error now if there's any junk in the cons free list. */ |
2707 | void | |
2708 | check_cons_list () | |
2709 | { | |
212f33f1 | 2710 | #ifdef GC_CHECK_CONS_LIST |
e3e56238 RS |
2711 | struct Lisp_Cons *tail = cons_free_list; |
2712 | ||
e3e56238 RS |
2713 | while (tail) |
2714 | tail = *(struct Lisp_Cons **)&tail->cdr; | |
2715 | #endif | |
2716 | } | |
34400008 | 2717 | |
2e471eb5 GM |
2718 | /* Make a list of 2, 3, 4 or 5 specified objects. */ |
2719 | ||
2720 | Lisp_Object | |
2721 | list2 (arg1, arg2) | |
2722 | Lisp_Object arg1, arg2; | |
2723 | { | |
2724 | return Fcons (arg1, Fcons (arg2, Qnil)); | |
2725 | } | |
2726 | ||
34400008 | 2727 | |
2e471eb5 GM |
2728 | Lisp_Object |
2729 | list3 (arg1, arg2, arg3) | |
2730 | Lisp_Object arg1, arg2, arg3; | |
2731 | { | |
2732 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Qnil))); | |
2733 | } | |
2734 | ||
34400008 | 2735 | |
2e471eb5 GM |
2736 | Lisp_Object |
2737 | list4 (arg1, arg2, arg3, arg4) | |
2738 | Lisp_Object arg1, arg2, arg3, arg4; | |
2739 | { | |
2740 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, Qnil)))); | |
2741 | } | |
2742 | ||
34400008 | 2743 | |
2e471eb5 GM |
2744 | Lisp_Object |
2745 | list5 (arg1, arg2, arg3, arg4, arg5) | |
2746 | Lisp_Object arg1, arg2, arg3, arg4, arg5; | |
2747 | { | |
2748 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, | |
2749 | Fcons (arg5, Qnil))))); | |
2750 | } | |
2751 | ||
34400008 | 2752 | |
2e471eb5 | 2753 | DEFUN ("list", Flist, Slist, 0, MANY, 0, |
eae936e2 | 2754 | doc: /* Return a newly created list with specified arguments as elements. |
ae8e8122 MB |
2755 | Any number of arguments, even zero arguments, are allowed. |
2756 | usage: (list &rest OBJECTS) */) | |
7ee72033 | 2757 | (nargs, args) |
2e471eb5 GM |
2758 | int nargs; |
2759 | register Lisp_Object *args; | |
2760 | { | |
2761 | register Lisp_Object val; | |
2762 | val = Qnil; | |
2763 | ||
2764 | while (nargs > 0) | |
2765 | { | |
2766 | nargs--; | |
2767 | val = Fcons (args[nargs], val); | |
2768 | } | |
2769 | return val; | |
2770 | } | |
2771 | ||
34400008 | 2772 | |
2e471eb5 | 2773 | DEFUN ("make-list", Fmake_list, Smake_list, 2, 2, 0, |
a6266d23 | 2774 | doc: /* Return a newly created list of length LENGTH, with each element being INIT. */) |
7ee72033 | 2775 | (length, init) |
2e471eb5 GM |
2776 | register Lisp_Object length, init; |
2777 | { | |
2778 | register Lisp_Object val; | |
2779 | register int size; | |
2780 | ||
b7826503 | 2781 | CHECK_NATNUM (length); |
2e471eb5 GM |
2782 | size = XFASTINT (length); |
2783 | ||
2784 | val = Qnil; | |
ce070307 GM |
2785 | while (size > 0) |
2786 | { | |
2787 | val = Fcons (init, val); | |
2788 | --size; | |
2789 | ||
2790 | if (size > 0) | |
2791 | { | |
2792 | val = Fcons (init, val); | |
2793 | --size; | |
177c0ea7 | 2794 | |
ce070307 GM |
2795 | if (size > 0) |
2796 | { | |
2797 | val = Fcons (init, val); | |
2798 | --size; | |
177c0ea7 | 2799 | |
ce070307 GM |
2800 | if (size > 0) |
2801 | { | |
2802 | val = Fcons (init, val); | |
2803 | --size; | |
177c0ea7 | 2804 | |
ce070307 GM |
2805 | if (size > 0) |
2806 | { | |
2807 | val = Fcons (init, val); | |
2808 | --size; | |
2809 | } | |
2810 | } | |
2811 | } | |
2812 | } | |
2813 | ||
2814 | QUIT; | |
2815 | } | |
177c0ea7 | 2816 | |
7146af97 JB |
2817 | return val; |
2818 | } | |
2e471eb5 GM |
2819 | |
2820 | ||
7146af97 | 2821 | \f |
2e471eb5 GM |
2822 | /*********************************************************************** |
2823 | Vector Allocation | |
2824 | ***********************************************************************/ | |
7146af97 | 2825 | |
34400008 GM |
2826 | /* Singly-linked list of all vectors. */ |
2827 | ||
7146af97 JB |
2828 | struct Lisp_Vector *all_vectors; |
2829 | ||
2e471eb5 GM |
2830 | /* Total number of vector-like objects now in use. */ |
2831 | ||
c8099634 RS |
2832 | int n_vectors; |
2833 | ||
34400008 GM |
2834 | |
2835 | /* Value is a pointer to a newly allocated Lisp_Vector structure | |
2836 | with room for LEN Lisp_Objects. */ | |
2837 | ||
ece93c02 GM |
2838 | static struct Lisp_Vector * |
2839 | allocate_vectorlike (len, type) | |
1825c68d | 2840 | EMACS_INT len; |
ece93c02 | 2841 | enum mem_type type; |
1825c68d KH |
2842 | { |
2843 | struct Lisp_Vector *p; | |
675d5130 | 2844 | size_t nbytes; |
1825c68d | 2845 | |
d1658221 | 2846 | #ifdef DOUG_LEA_MALLOC |
f8608968 GM |
2847 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
2848 | because mapped region contents are not preserved in | |
2849 | a dumped Emacs. */ | |
de7515d6 | 2850 | BLOCK_INPUT; |
d1658221 | 2851 | mallopt (M_MMAP_MAX, 0); |
de7515d6 | 2852 | UNBLOCK_INPUT; |
d1658221 | 2853 | #endif |
177c0ea7 | 2854 | |
34400008 | 2855 | nbytes = sizeof *p + (len - 1) * sizeof p->contents[0]; |
ece93c02 | 2856 | p = (struct Lisp_Vector *) lisp_malloc (nbytes, type); |
177c0ea7 | 2857 | |
d1658221 | 2858 | #ifdef DOUG_LEA_MALLOC |
34400008 | 2859 | /* Back to a reasonable maximum of mmap'ed areas. */ |
de7515d6 | 2860 | BLOCK_INPUT; |
81d492d5 | 2861 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); |
de7515d6 | 2862 | UNBLOCK_INPUT; |
d1658221 | 2863 | #endif |
177c0ea7 | 2864 | |
34400008 | 2865 | consing_since_gc += nbytes; |
310ea200 | 2866 | vector_cells_consed += len; |
1825c68d KH |
2867 | |
2868 | p->next = all_vectors; | |
2869 | all_vectors = p; | |
34400008 | 2870 | ++n_vectors; |
1825c68d KH |
2871 | return p; |
2872 | } | |
2873 | ||
34400008 | 2874 | |
ece93c02 GM |
2875 | /* Allocate a vector with NSLOTS slots. */ |
2876 | ||
2877 | struct Lisp_Vector * | |
2878 | allocate_vector (nslots) | |
2879 | EMACS_INT nslots; | |
2880 | { | |
2881 | struct Lisp_Vector *v = allocate_vectorlike (nslots, MEM_TYPE_VECTOR); | |
2882 | v->size = nslots; | |
2883 | return v; | |
2884 | } | |
2885 | ||
2886 | ||
2887 | /* Allocate other vector-like structures. */ | |
2888 | ||
2889 | struct Lisp_Hash_Table * | |
2890 | allocate_hash_table () | |
2891 | { | |
2892 | EMACS_INT len = VECSIZE (struct Lisp_Hash_Table); | |
2893 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_HASH_TABLE); | |
2894 | EMACS_INT i; | |
177c0ea7 | 2895 | |
ece93c02 GM |
2896 | v->size = len; |
2897 | for (i = 0; i < len; ++i) | |
2898 | v->contents[i] = Qnil; | |
177c0ea7 | 2899 | |
ece93c02 GM |
2900 | return (struct Lisp_Hash_Table *) v; |
2901 | } | |
2902 | ||
2903 | ||
2904 | struct window * | |
2905 | allocate_window () | |
2906 | { | |
2907 | EMACS_INT len = VECSIZE (struct window); | |
2908 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_WINDOW); | |
2909 | EMACS_INT i; | |
177c0ea7 | 2910 | |
ece93c02 GM |
2911 | for (i = 0; i < len; ++i) |
2912 | v->contents[i] = Qnil; | |
2913 | v->size = len; | |
177c0ea7 | 2914 | |
ece93c02 GM |
2915 | return (struct window *) v; |
2916 | } | |
2917 | ||
2918 | ||
2919 | struct frame * | |
2920 | allocate_frame () | |
2921 | { | |
2922 | EMACS_INT len = VECSIZE (struct frame); | |
2923 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_FRAME); | |
2924 | EMACS_INT i; | |
177c0ea7 | 2925 | |
ece93c02 GM |
2926 | for (i = 0; i < len; ++i) |
2927 | v->contents[i] = make_number (0); | |
2928 | v->size = len; | |
2929 | return (struct frame *) v; | |
2930 | } | |
2931 | ||
2932 | ||
2933 | struct Lisp_Process * | |
2934 | allocate_process () | |
2935 | { | |
2936 | EMACS_INT len = VECSIZE (struct Lisp_Process); | |
2937 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_PROCESS); | |
2938 | EMACS_INT i; | |
177c0ea7 | 2939 | |
ece93c02 GM |
2940 | for (i = 0; i < len; ++i) |
2941 | v->contents[i] = Qnil; | |
2942 | v->size = len; | |
177c0ea7 | 2943 | |
ece93c02 GM |
2944 | return (struct Lisp_Process *) v; |
2945 | } | |
2946 | ||
2947 | ||
2948 | struct Lisp_Vector * | |
2949 | allocate_other_vector (len) | |
2950 | EMACS_INT len; | |
2951 | { | |
2952 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_VECTOR); | |
2953 | EMACS_INT i; | |
177c0ea7 | 2954 | |
ece93c02 GM |
2955 | for (i = 0; i < len; ++i) |
2956 | v->contents[i] = Qnil; | |
2957 | v->size = len; | |
177c0ea7 | 2958 | |
ece93c02 GM |
2959 | return v; |
2960 | } | |
2961 | ||
2962 | ||
7146af97 | 2963 | DEFUN ("make-vector", Fmake_vector, Smake_vector, 2, 2, 0, |
a6266d23 | 2964 | doc: /* Return a newly created vector of length LENGTH, with each element being INIT. |
7ee72033 MB |
2965 | See also the function `vector'. */) |
2966 | (length, init) | |
7146af97 JB |
2967 | register Lisp_Object length, init; |
2968 | { | |
1825c68d KH |
2969 | Lisp_Object vector; |
2970 | register EMACS_INT sizei; | |
2971 | register int index; | |
7146af97 JB |
2972 | register struct Lisp_Vector *p; |
2973 | ||
b7826503 | 2974 | CHECK_NATNUM (length); |
c9dad5ed | 2975 | sizei = XFASTINT (length); |
7146af97 | 2976 | |
ece93c02 | 2977 | p = allocate_vector (sizei); |
7146af97 JB |
2978 | for (index = 0; index < sizei; index++) |
2979 | p->contents[index] = init; | |
2980 | ||
1825c68d | 2981 | XSETVECTOR (vector, p); |
7146af97 JB |
2982 | return vector; |
2983 | } | |
2984 | ||
34400008 | 2985 | |
a59de17b | 2986 | DEFUN ("make-char-table", Fmake_char_table, Smake_char_table, 1, 2, 0, |
a6266d23 | 2987 | doc: /* Return a newly created char-table, with purpose PURPOSE. |
228299fa GM |
2988 | Each element is initialized to INIT, which defaults to nil. |
2989 | PURPOSE should be a symbol which has a `char-table-extra-slots' property. | |
7ee72033 MB |
2990 | The property's value should be an integer between 0 and 10. */) |
2991 | (purpose, init) | |
a59de17b | 2992 | register Lisp_Object purpose, init; |
7b07587b RS |
2993 | { |
2994 | Lisp_Object vector; | |
a59de17b | 2995 | Lisp_Object n; |
b7826503 | 2996 | CHECK_SYMBOL (purpose); |
0551bde3 | 2997 | n = Fget (purpose, Qchar_table_extra_slots); |
b7826503 | 2998 | CHECK_NUMBER (n); |
7b07587b RS |
2999 | if (XINT (n) < 0 || XINT (n) > 10) |
3000 | args_out_of_range (n, Qnil); | |
3001 | /* Add 2 to the size for the defalt and parent slots. */ | |
3002 | vector = Fmake_vector (make_number (CHAR_TABLE_STANDARD_SLOTS + XINT (n)), | |
3003 | init); | |
0551bde3 | 3004 | XCHAR_TABLE (vector)->top = Qt; |
c96a008c | 3005 | XCHAR_TABLE (vector)->parent = Qnil; |
a59de17b | 3006 | XCHAR_TABLE (vector)->purpose = purpose; |
7b07587b RS |
3007 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); |
3008 | return vector; | |
3009 | } | |
3010 | ||
34400008 | 3011 | |
0551bde3 KH |
3012 | /* Return a newly created sub char table with default value DEFALT. |
3013 | Since a sub char table does not appear as a top level Emacs Lisp | |
3014 | object, we don't need a Lisp interface to make it. */ | |
3015 | ||
3016 | Lisp_Object | |
3017 | make_sub_char_table (defalt) | |
3018 | Lisp_Object defalt; | |
3019 | { | |
3020 | Lisp_Object vector | |
3021 | = Fmake_vector (make_number (SUB_CHAR_TABLE_STANDARD_SLOTS), Qnil); | |
3022 | XCHAR_TABLE (vector)->top = Qnil; | |
3023 | XCHAR_TABLE (vector)->defalt = defalt; | |
3024 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); | |
3025 | return vector; | |
3026 | } | |
3027 | ||
34400008 | 3028 | |
7146af97 | 3029 | DEFUN ("vector", Fvector, Svector, 0, MANY, 0, |
eae936e2 | 3030 | doc: /* Return a newly created vector with specified arguments as elements. |
ae8e8122 MB |
3031 | Any number of arguments, even zero arguments, are allowed. |
3032 | usage: (vector &rest OBJECTS) */) | |
7ee72033 | 3033 | (nargs, args) |
7146af97 JB |
3034 | register int nargs; |
3035 | Lisp_Object *args; | |
3036 | { | |
3037 | register Lisp_Object len, val; | |
3038 | register int index; | |
3039 | register struct Lisp_Vector *p; | |
3040 | ||
67ba9986 | 3041 | XSETFASTINT (len, nargs); |
7146af97 JB |
3042 | val = Fmake_vector (len, Qnil); |
3043 | p = XVECTOR (val); | |
3044 | for (index = 0; index < nargs; index++) | |
3045 | p->contents[index] = args[index]; | |
3046 | return val; | |
3047 | } | |
3048 | ||
34400008 | 3049 | |
7146af97 | 3050 | DEFUN ("make-byte-code", Fmake_byte_code, Smake_byte_code, 4, MANY, 0, |
a6266d23 | 3051 | doc: /* Create a byte-code object with specified arguments as elements. |
228299fa GM |
3052 | The arguments should be the arglist, bytecode-string, constant vector, |
3053 | stack size, (optional) doc string, and (optional) interactive spec. | |
3054 | The first four arguments are required; at most six have any | |
ae8e8122 | 3055 | significance. |
92cc28b2 | 3056 | usage: (make-byte-code ARGLIST BYTE-CODE CONSTANTS DEPTH &optional DOCSTRING INTERACTIVE-SPEC &rest ELEMENTS) */) |
7ee72033 | 3057 | (nargs, args) |
7146af97 JB |
3058 | register int nargs; |
3059 | Lisp_Object *args; | |
3060 | { | |
3061 | register Lisp_Object len, val; | |
3062 | register int index; | |
3063 | register struct Lisp_Vector *p; | |
3064 | ||
67ba9986 | 3065 | XSETFASTINT (len, nargs); |
265a9e55 | 3066 | if (!NILP (Vpurify_flag)) |
5a053ea9 | 3067 | val = make_pure_vector ((EMACS_INT) nargs); |
7146af97 JB |
3068 | else |
3069 | val = Fmake_vector (len, Qnil); | |
9eac9d59 KH |
3070 | |
3071 | if (STRINGP (args[1]) && STRING_MULTIBYTE (args[1])) | |
3072 | /* BYTECODE-STRING must have been produced by Emacs 20.2 or the | |
3073 | earlier because they produced a raw 8-bit string for byte-code | |
3074 | and now such a byte-code string is loaded as multibyte while | |
3075 | raw 8-bit characters converted to multibyte form. Thus, now we | |
3076 | must convert them back to the original unibyte form. */ | |
3077 | args[1] = Fstring_as_unibyte (args[1]); | |
3078 | ||
7146af97 JB |
3079 | p = XVECTOR (val); |
3080 | for (index = 0; index < nargs; index++) | |
3081 | { | |
265a9e55 | 3082 | if (!NILP (Vpurify_flag)) |
7146af97 JB |
3083 | args[index] = Fpurecopy (args[index]); |
3084 | p->contents[index] = args[index]; | |
3085 | } | |
50aee051 | 3086 | XSETCOMPILED (val, p); |
7146af97 JB |
3087 | return val; |
3088 | } | |
2e471eb5 | 3089 | |
34400008 | 3090 | |
7146af97 | 3091 | \f |
2e471eb5 GM |
3092 | /*********************************************************************** |
3093 | Symbol Allocation | |
3094 | ***********************************************************************/ | |
7146af97 | 3095 | |
2e471eb5 GM |
3096 | /* Each symbol_block is just under 1020 bytes long, since malloc |
3097 | really allocates in units of powers of two and uses 4 bytes for its | |
3098 | own overhead. */ | |
7146af97 JB |
3099 | |
3100 | #define SYMBOL_BLOCK_SIZE \ | |
3101 | ((1020 - sizeof (struct symbol_block *)) / sizeof (struct Lisp_Symbol)) | |
3102 | ||
3103 | struct symbol_block | |
2e471eb5 | 3104 | { |
d05b383a | 3105 | /* Place `symbols' first, to preserve alignment. */ |
2e471eb5 | 3106 | struct Lisp_Symbol symbols[SYMBOL_BLOCK_SIZE]; |
d05b383a | 3107 | struct symbol_block *next; |
2e471eb5 | 3108 | }; |
7146af97 | 3109 | |
34400008 GM |
3110 | /* Current symbol block and index of first unused Lisp_Symbol |
3111 | structure in it. */ | |
3112 | ||
7146af97 JB |
3113 | struct symbol_block *symbol_block; |
3114 | int symbol_block_index; | |
3115 | ||
34400008 GM |
3116 | /* List of free symbols. */ |
3117 | ||
7146af97 JB |
3118 | struct Lisp_Symbol *symbol_free_list; |
3119 | ||
c8099634 | 3120 | /* Total number of symbol blocks now in use. */ |
2e471eb5 | 3121 | |
c8099634 RS |
3122 | int n_symbol_blocks; |
3123 | ||
34400008 GM |
3124 | |
3125 | /* Initialize symbol allocation. */ | |
3126 | ||
7146af97 JB |
3127 | void |
3128 | init_symbol () | |
3129 | { | |
0930c1a1 SM |
3130 | symbol_block = NULL; |
3131 | symbol_block_index = SYMBOL_BLOCK_SIZE; | |
7146af97 | 3132 | symbol_free_list = 0; |
0930c1a1 | 3133 | n_symbol_blocks = 0; |
7146af97 JB |
3134 | } |
3135 | ||
34400008 | 3136 | |
7146af97 | 3137 | DEFUN ("make-symbol", Fmake_symbol, Smake_symbol, 1, 1, 0, |
a6266d23 | 3138 | doc: /* Return a newly allocated uninterned symbol whose name is NAME. |
7ee72033 MB |
3139 | Its value and function definition are void, and its property list is nil. */) |
3140 | (name) | |
54ee42dd | 3141 | Lisp_Object name; |
7146af97 JB |
3142 | { |
3143 | register Lisp_Object val; | |
3144 | register struct Lisp_Symbol *p; | |
3145 | ||
b7826503 | 3146 | CHECK_STRING (name); |
7146af97 JB |
3147 | |
3148 | if (symbol_free_list) | |
3149 | { | |
45d12a89 | 3150 | XSETSYMBOL (val, symbol_free_list); |
85481507 | 3151 | symbol_free_list = *(struct Lisp_Symbol **)&symbol_free_list->value; |
7146af97 JB |
3152 | } |
3153 | else | |
3154 | { | |
3155 | if (symbol_block_index == SYMBOL_BLOCK_SIZE) | |
3156 | { | |
3c06d205 | 3157 | struct symbol_block *new; |
34400008 GM |
3158 | new = (struct symbol_block *) lisp_malloc (sizeof *new, |
3159 | MEM_TYPE_SYMBOL); | |
7146af97 JB |
3160 | new->next = symbol_block; |
3161 | symbol_block = new; | |
3162 | symbol_block_index = 0; | |
c8099634 | 3163 | n_symbol_blocks++; |
7146af97 | 3164 | } |
a0668126 SM |
3165 | XSETSYMBOL (val, &symbol_block->symbols[symbol_block_index]); |
3166 | symbol_block_index++; | |
7146af97 | 3167 | } |
177c0ea7 | 3168 | |
7146af97 | 3169 | p = XSYMBOL (val); |
8fe5665d | 3170 | p->xname = name; |
7146af97 | 3171 | p->plist = Qnil; |
2e471eb5 GM |
3172 | p->value = Qunbound; |
3173 | p->function = Qunbound; | |
9e713715 | 3174 | p->next = NULL; |
2336fe58 | 3175 | p->gcmarkbit = 0; |
9e713715 GM |
3176 | p->interned = SYMBOL_UNINTERNED; |
3177 | p->constant = 0; | |
3178 | p->indirect_variable = 0; | |
2e471eb5 GM |
3179 | consing_since_gc += sizeof (struct Lisp_Symbol); |
3180 | symbols_consed++; | |
7146af97 JB |
3181 | return val; |
3182 | } | |
3183 | ||
3f25e183 | 3184 | |
2e471eb5 GM |
3185 | \f |
3186 | /*********************************************************************** | |
34400008 | 3187 | Marker (Misc) Allocation |
2e471eb5 | 3188 | ***********************************************************************/ |
3f25e183 | 3189 | |
2e471eb5 GM |
3190 | /* Allocation of markers and other objects that share that structure. |
3191 | Works like allocation of conses. */ | |
c0696668 | 3192 | |
2e471eb5 GM |
3193 | #define MARKER_BLOCK_SIZE \ |
3194 | ((1020 - sizeof (struct marker_block *)) / sizeof (union Lisp_Misc)) | |
3195 | ||
3196 | struct marker_block | |
c0696668 | 3197 | { |
d05b383a | 3198 | /* Place `markers' first, to preserve alignment. */ |
2e471eb5 | 3199 | union Lisp_Misc markers[MARKER_BLOCK_SIZE]; |
d05b383a | 3200 | struct marker_block *next; |
2e471eb5 | 3201 | }; |
c0696668 | 3202 | |
2e471eb5 GM |
3203 | struct marker_block *marker_block; |
3204 | int marker_block_index; | |
c0696668 | 3205 | |
2e471eb5 | 3206 | union Lisp_Misc *marker_free_list; |
c0696668 | 3207 | |
2e471eb5 | 3208 | /* Total number of marker blocks now in use. */ |
3f25e183 | 3209 | |
2e471eb5 GM |
3210 | int n_marker_blocks; |
3211 | ||
3212 | void | |
3213 | init_marker () | |
3f25e183 | 3214 | { |
0930c1a1 SM |
3215 | marker_block = NULL; |
3216 | marker_block_index = MARKER_BLOCK_SIZE; | |
2e471eb5 | 3217 | marker_free_list = 0; |
0930c1a1 | 3218 | n_marker_blocks = 0; |
3f25e183 RS |
3219 | } |
3220 | ||
2e471eb5 GM |
3221 | /* Return a newly allocated Lisp_Misc object, with no substructure. */ |
3222 | ||
3f25e183 | 3223 | Lisp_Object |
2e471eb5 | 3224 | allocate_misc () |
7146af97 | 3225 | { |
2e471eb5 | 3226 | Lisp_Object val; |
7146af97 | 3227 | |
2e471eb5 | 3228 | if (marker_free_list) |
7146af97 | 3229 | { |
2e471eb5 GM |
3230 | XSETMISC (val, marker_free_list); |
3231 | marker_free_list = marker_free_list->u_free.chain; | |
7146af97 JB |
3232 | } |
3233 | else | |
7146af97 | 3234 | { |
2e471eb5 GM |
3235 | if (marker_block_index == MARKER_BLOCK_SIZE) |
3236 | { | |
3237 | struct marker_block *new; | |
34400008 GM |
3238 | new = (struct marker_block *) lisp_malloc (sizeof *new, |
3239 | MEM_TYPE_MISC); | |
2e471eb5 GM |
3240 | new->next = marker_block; |
3241 | marker_block = new; | |
3242 | marker_block_index = 0; | |
3243 | n_marker_blocks++; | |
7b7990cc | 3244 | total_free_markers += MARKER_BLOCK_SIZE; |
2e471eb5 | 3245 | } |
a0668126 SM |
3246 | XSETMISC (val, &marker_block->markers[marker_block_index]); |
3247 | marker_block_index++; | |
7146af97 | 3248 | } |
177c0ea7 | 3249 | |
7b7990cc | 3250 | --total_free_markers; |
2e471eb5 GM |
3251 | consing_since_gc += sizeof (union Lisp_Misc); |
3252 | misc_objects_consed++; | |
2336fe58 | 3253 | XMARKER (val)->gcmarkbit = 0; |
2e471eb5 GM |
3254 | return val; |
3255 | } | |
3256 | ||
7b7990cc KS |
3257 | /* Free a Lisp_Misc object */ |
3258 | ||
3259 | void | |
3260 | free_misc (misc) | |
3261 | Lisp_Object misc; | |
3262 | { | |
3263 | XMISC (misc)->u_marker.type = Lisp_Misc_Free; | |
3264 | XMISC (misc)->u_free.chain = marker_free_list; | |
3265 | marker_free_list = XMISC (misc); | |
3266 | ||
3267 | total_free_markers++; | |
3268 | } | |
3269 | ||
42172a6b RS |
3270 | /* Return a Lisp_Misc_Save_Value object containing POINTER and |
3271 | INTEGER. This is used to package C values to call record_unwind_protect. | |
3272 | The unwind function can get the C values back using XSAVE_VALUE. */ | |
3273 | ||
3274 | Lisp_Object | |
3275 | make_save_value (pointer, integer) | |
3276 | void *pointer; | |
3277 | int integer; | |
3278 | { | |
3279 | register Lisp_Object val; | |
3280 | register struct Lisp_Save_Value *p; | |
3281 | ||
3282 | val = allocate_misc (); | |
3283 | XMISCTYPE (val) = Lisp_Misc_Save_Value; | |
3284 | p = XSAVE_VALUE (val); | |
3285 | p->pointer = pointer; | |
3286 | p->integer = integer; | |
b766f870 | 3287 | p->dogc = 0; |
42172a6b RS |
3288 | return val; |
3289 | } | |
3290 | ||
2e471eb5 | 3291 | DEFUN ("make-marker", Fmake_marker, Smake_marker, 0, 0, 0, |
a6266d23 | 3292 | doc: /* Return a newly allocated marker which does not point at any place. */) |
7ee72033 | 3293 | () |
2e471eb5 GM |
3294 | { |
3295 | register Lisp_Object val; | |
3296 | register struct Lisp_Marker *p; | |
7146af97 | 3297 | |
2e471eb5 GM |
3298 | val = allocate_misc (); |
3299 | XMISCTYPE (val) = Lisp_Misc_Marker; | |
3300 | p = XMARKER (val); | |
3301 | p->buffer = 0; | |
3302 | p->bytepos = 0; | |
3303 | p->charpos = 0; | |
ef89c2ce | 3304 | p->next = NULL; |
2e471eb5 | 3305 | p->insertion_type = 0; |
7146af97 JB |
3306 | return val; |
3307 | } | |
2e471eb5 GM |
3308 | |
3309 | /* Put MARKER back on the free list after using it temporarily. */ | |
3310 | ||
3311 | void | |
3312 | free_marker (marker) | |
3313 | Lisp_Object marker; | |
3314 | { | |
ef89c2ce | 3315 | unchain_marker (XMARKER (marker)); |
7b7990cc | 3316 | free_misc (marker); |
2e471eb5 GM |
3317 | } |
3318 | ||
c0696668 | 3319 | \f |
7146af97 | 3320 | /* Return a newly created vector or string with specified arguments as |
736471d1 RS |
3321 | elements. If all the arguments are characters that can fit |
3322 | in a string of events, make a string; otherwise, make a vector. | |
3323 | ||
3324 | Any number of arguments, even zero arguments, are allowed. */ | |
7146af97 JB |
3325 | |
3326 | Lisp_Object | |
736471d1 | 3327 | make_event_array (nargs, args) |
7146af97 JB |
3328 | register int nargs; |
3329 | Lisp_Object *args; | |
3330 | { | |
3331 | int i; | |
3332 | ||
3333 | for (i = 0; i < nargs; i++) | |
736471d1 | 3334 | /* The things that fit in a string |
c9ca4659 RS |
3335 | are characters that are in 0...127, |
3336 | after discarding the meta bit and all the bits above it. */ | |
e687453f | 3337 | if (!INTEGERP (args[i]) |
c9ca4659 | 3338 | || (XUINT (args[i]) & ~(-CHAR_META)) >= 0200) |
7146af97 JB |
3339 | return Fvector (nargs, args); |
3340 | ||
3341 | /* Since the loop exited, we know that all the things in it are | |
3342 | characters, so we can make a string. */ | |
3343 | { | |
c13ccad2 | 3344 | Lisp_Object result; |
177c0ea7 | 3345 | |
50aee051 | 3346 | result = Fmake_string (make_number (nargs), make_number (0)); |
7146af97 | 3347 | for (i = 0; i < nargs; i++) |
736471d1 | 3348 | { |
46e7e6b0 | 3349 | SSET (result, i, XINT (args[i])); |
736471d1 RS |
3350 | /* Move the meta bit to the right place for a string char. */ |
3351 | if (XINT (args[i]) & CHAR_META) | |
46e7e6b0 | 3352 | SSET (result, i, SREF (result, i) | 0x80); |
736471d1 | 3353 | } |
177c0ea7 | 3354 | |
7146af97 JB |
3355 | return result; |
3356 | } | |
3357 | } | |
2e471eb5 GM |
3358 | |
3359 | ||
7146af97 | 3360 | \f |
34400008 GM |
3361 | /************************************************************************ |
3362 | C Stack Marking | |
3363 | ************************************************************************/ | |
3364 | ||
13c844fb GM |
3365 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
3366 | ||
71cf5fa0 GM |
3367 | /* Conservative C stack marking requires a method to identify possibly |
3368 | live Lisp objects given a pointer value. We do this by keeping | |
3369 | track of blocks of Lisp data that are allocated in a red-black tree | |
3370 | (see also the comment of mem_node which is the type of nodes in | |
3371 | that tree). Function lisp_malloc adds information for an allocated | |
3372 | block to the red-black tree with calls to mem_insert, and function | |
3373 | lisp_free removes it with mem_delete. Functions live_string_p etc | |
3374 | call mem_find to lookup information about a given pointer in the | |
3375 | tree, and use that to determine if the pointer points to a Lisp | |
3376 | object or not. */ | |
3377 | ||
34400008 GM |
3378 | /* Initialize this part of alloc.c. */ |
3379 | ||
3380 | static void | |
3381 | mem_init () | |
3382 | { | |
3383 | mem_z.left = mem_z.right = MEM_NIL; | |
3384 | mem_z.parent = NULL; | |
3385 | mem_z.color = MEM_BLACK; | |
3386 | mem_z.start = mem_z.end = NULL; | |
3387 | mem_root = MEM_NIL; | |
3388 | } | |
3389 | ||
3390 | ||
3391 | /* Value is a pointer to the mem_node containing START. Value is | |
3392 | MEM_NIL if there is no node in the tree containing START. */ | |
3393 | ||
3394 | static INLINE struct mem_node * | |
3395 | mem_find (start) | |
3396 | void *start; | |
3397 | { | |
3398 | struct mem_node *p; | |
3399 | ||
ece93c02 GM |
3400 | if (start < min_heap_address || start > max_heap_address) |
3401 | return MEM_NIL; | |
3402 | ||
34400008 GM |
3403 | /* Make the search always successful to speed up the loop below. */ |
3404 | mem_z.start = start; | |
3405 | mem_z.end = (char *) start + 1; | |
3406 | ||
3407 | p = mem_root; | |
3408 | while (start < p->start || start >= p->end) | |
3409 | p = start < p->start ? p->left : p->right; | |
3410 | return p; | |
3411 | } | |
3412 | ||
3413 | ||
3414 | /* Insert a new node into the tree for a block of memory with start | |
3415 | address START, end address END, and type TYPE. Value is a | |
3416 | pointer to the node that was inserted. */ | |
3417 | ||
3418 | static struct mem_node * | |
3419 | mem_insert (start, end, type) | |
3420 | void *start, *end; | |
3421 | enum mem_type type; | |
3422 | { | |
3423 | struct mem_node *c, *parent, *x; | |
3424 | ||
ece93c02 GM |
3425 | if (start < min_heap_address) |
3426 | min_heap_address = start; | |
3427 | if (end > max_heap_address) | |
3428 | max_heap_address = end; | |
3429 | ||
34400008 GM |
3430 | /* See where in the tree a node for START belongs. In this |
3431 | particular application, it shouldn't happen that a node is already | |
3432 | present. For debugging purposes, let's check that. */ | |
3433 | c = mem_root; | |
3434 | parent = NULL; | |
3435 | ||
3436 | #if GC_MARK_STACK != GC_MAKE_GCPROS_NOOPS | |
177c0ea7 | 3437 | |
34400008 GM |
3438 | while (c != MEM_NIL) |
3439 | { | |
3440 | if (start >= c->start && start < c->end) | |
3441 | abort (); | |
3442 | parent = c; | |
3443 | c = start < c->start ? c->left : c->right; | |
3444 | } | |
177c0ea7 | 3445 | |
34400008 | 3446 | #else /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ |
177c0ea7 | 3447 | |
34400008 GM |
3448 | while (c != MEM_NIL) |
3449 | { | |
3450 | parent = c; | |
3451 | c = start < c->start ? c->left : c->right; | |
3452 | } | |
177c0ea7 | 3453 | |
34400008 GM |
3454 | #endif /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ |
3455 | ||
3456 | /* Create a new node. */ | |
877935b1 GM |
3457 | #ifdef GC_MALLOC_CHECK |
3458 | x = (struct mem_node *) _malloc_internal (sizeof *x); | |
3459 | if (x == NULL) | |
3460 | abort (); | |
3461 | #else | |
34400008 | 3462 | x = (struct mem_node *) xmalloc (sizeof *x); |
877935b1 | 3463 | #endif |
34400008 GM |
3464 | x->start = start; |
3465 | x->end = end; | |
3466 | x->type = type; | |
3467 | x->parent = parent; | |
3468 | x->left = x->right = MEM_NIL; | |
3469 | x->color = MEM_RED; | |
3470 | ||
3471 | /* Insert it as child of PARENT or install it as root. */ | |
3472 | if (parent) | |
3473 | { | |
3474 | if (start < parent->start) | |
3475 | parent->left = x; | |
3476 | else | |
3477 | parent->right = x; | |
3478 | } | |
177c0ea7 | 3479 | else |
34400008 GM |
3480 | mem_root = x; |
3481 | ||
3482 | /* Re-establish red-black tree properties. */ | |
3483 | mem_insert_fixup (x); | |
877935b1 | 3484 | |
34400008 GM |
3485 | return x; |
3486 | } | |
3487 | ||
3488 | ||
3489 | /* Re-establish the red-black properties of the tree, and thereby | |
3490 | balance the tree, after node X has been inserted; X is always red. */ | |
3491 | ||
3492 | static void | |
3493 | mem_insert_fixup (x) | |
3494 | struct mem_node *x; | |
3495 | { | |
3496 | while (x != mem_root && x->parent->color == MEM_RED) | |
3497 | { | |
3498 | /* X is red and its parent is red. This is a violation of | |
3499 | red-black tree property #3. */ | |
177c0ea7 | 3500 | |
34400008 GM |
3501 | if (x->parent == x->parent->parent->left) |
3502 | { | |
3503 | /* We're on the left side of our grandparent, and Y is our | |
3504 | "uncle". */ | |
3505 | struct mem_node *y = x->parent->parent->right; | |
177c0ea7 | 3506 | |
34400008 GM |
3507 | if (y->color == MEM_RED) |
3508 | { | |
3509 | /* Uncle and parent are red but should be black because | |
3510 | X is red. Change the colors accordingly and proceed | |
3511 | with the grandparent. */ | |
3512 | x->parent->color = MEM_BLACK; | |
3513 | y->color = MEM_BLACK; | |
3514 | x->parent->parent->color = MEM_RED; | |
3515 | x = x->parent->parent; | |
3516 | } | |
3517 | else | |
3518 | { | |
3519 | /* Parent and uncle have different colors; parent is | |
3520 | red, uncle is black. */ | |
3521 | if (x == x->parent->right) | |
3522 | { | |
3523 | x = x->parent; | |
3524 | mem_rotate_left (x); | |
3525 | } | |
3526 | ||
3527 | x->parent->color = MEM_BLACK; | |
3528 | x->parent->parent->color = MEM_RED; | |
3529 | mem_rotate_right (x->parent->parent); | |
3530 | } | |
3531 | } | |
3532 | else | |
3533 | { | |
3534 | /* This is the symmetrical case of above. */ | |
3535 | struct mem_node *y = x->parent->parent->left; | |
177c0ea7 | 3536 | |
34400008 GM |
3537 | if (y->color == MEM_RED) |
3538 | { | |
3539 | x->parent->color = MEM_BLACK; | |
3540 | y->color = MEM_BLACK; | |
3541 | x->parent->parent->color = MEM_RED; | |
3542 | x = x->parent->parent; | |
3543 | } | |
3544 | else | |
3545 | { | |
3546 | if (x == x->parent->left) | |
3547 | { | |
3548 | x = x->parent; | |
3549 | mem_rotate_right (x); | |
3550 | } | |
177c0ea7 | 3551 | |
34400008 GM |
3552 | x->parent->color = MEM_BLACK; |
3553 | x->parent->parent->color = MEM_RED; | |
3554 | mem_rotate_left (x->parent->parent); | |
3555 | } | |
3556 | } | |
3557 | } | |
3558 | ||
3559 | /* The root may have been changed to red due to the algorithm. Set | |
3560 | it to black so that property #5 is satisfied. */ | |
3561 | mem_root->color = MEM_BLACK; | |
3562 | } | |
3563 | ||
3564 | ||
177c0ea7 JB |
3565 | /* (x) (y) |
3566 | / \ / \ | |
34400008 GM |
3567 | a (y) ===> (x) c |
3568 | / \ / \ | |
3569 | b c a b */ | |
3570 | ||
3571 | static void | |
3572 | mem_rotate_left (x) | |
3573 | struct mem_node *x; | |
3574 | { | |
3575 | struct mem_node *y; | |
3576 | ||
3577 | /* Turn y's left sub-tree into x's right sub-tree. */ | |
3578 | y = x->right; | |
3579 | x->right = y->left; | |
3580 | if (y->left != MEM_NIL) | |
3581 | y->left->parent = x; | |
3582 | ||
3583 | /* Y's parent was x's parent. */ | |
3584 | if (y != MEM_NIL) | |
3585 | y->parent = x->parent; | |
3586 | ||
3587 | /* Get the parent to point to y instead of x. */ | |
3588 | if (x->parent) | |
3589 | { | |
3590 | if (x == x->parent->left) | |
3591 | x->parent->left = y; | |
3592 | else | |
3593 | x->parent->right = y; | |
3594 | } | |
3595 | else | |
3596 | mem_root = y; | |
3597 | ||
3598 | /* Put x on y's left. */ | |
3599 | y->left = x; | |
3600 | if (x != MEM_NIL) | |
3601 | x->parent = y; | |
3602 | } | |
3603 | ||
3604 | ||
177c0ea7 JB |
3605 | /* (x) (Y) |
3606 | / \ / \ | |
3607 | (y) c ===> a (x) | |
3608 | / \ / \ | |
34400008 GM |
3609 | a b b c */ |
3610 | ||
3611 | static void | |
3612 | mem_rotate_right (x) | |
3613 | struct mem_node *x; | |
3614 | { | |
3615 | struct mem_node *y = x->left; | |
3616 | ||
3617 | x->left = y->right; | |
3618 | if (y->right != MEM_NIL) | |
3619 | y->right->parent = x; | |
177c0ea7 | 3620 | |
34400008 GM |
3621 | if (y != MEM_NIL) |
3622 | y->parent = x->parent; | |
3623 | if (x->parent) | |
3624 | { | |
3625 | if (x == x->parent->right) | |
3626 | x->parent->right = y; | |
3627 | else | |
3628 | x->parent->left = y; | |
3629 | } | |
3630 | else | |
3631 | mem_root = y; | |
177c0ea7 | 3632 | |
34400008 GM |
3633 | y->right = x; |
3634 | if (x != MEM_NIL) | |
3635 | x->parent = y; | |
3636 | } | |
3637 | ||
3638 | ||
3639 | /* Delete node Z from the tree. If Z is null or MEM_NIL, do nothing. */ | |
3640 | ||
3641 | static void | |
3642 | mem_delete (z) | |
3643 | struct mem_node *z; | |
3644 | { | |
3645 | struct mem_node *x, *y; | |
3646 | ||
3647 | if (!z || z == MEM_NIL) | |
3648 | return; | |
3649 | ||
3650 | if (z->left == MEM_NIL || z->right == MEM_NIL) | |
3651 | y = z; | |
3652 | else | |
3653 | { | |
3654 | y = z->right; | |
3655 | while (y->left != MEM_NIL) | |
3656 | y = y->left; | |
3657 | } | |
3658 | ||
3659 | if (y->left != MEM_NIL) | |
3660 | x = y->left; | |
3661 | else | |
3662 | x = y->right; | |
3663 | ||
3664 | x->parent = y->parent; | |
3665 | if (y->parent) | |
3666 | { | |
3667 | if (y == y->parent->left) | |
3668 | y->parent->left = x; | |
3669 | else | |
3670 | y->parent->right = x; | |
3671 | } | |
3672 | else | |
3673 | mem_root = x; | |
3674 | ||
3675 | if (y != z) | |
3676 | { | |
3677 | z->start = y->start; | |
3678 | z->end = y->end; | |
3679 | z->type = y->type; | |
3680 | } | |
177c0ea7 | 3681 | |
34400008 GM |
3682 | if (y->color == MEM_BLACK) |
3683 | mem_delete_fixup (x); | |
877935b1 GM |
3684 | |
3685 | #ifdef GC_MALLOC_CHECK | |
3686 | _free_internal (y); | |
3687 | #else | |
34400008 | 3688 | xfree (y); |
877935b1 | 3689 | #endif |
34400008 GM |
3690 | } |
3691 | ||
3692 | ||
3693 | /* Re-establish the red-black properties of the tree, after a | |
3694 | deletion. */ | |
3695 | ||
3696 | static void | |
3697 | mem_delete_fixup (x) | |
3698 | struct mem_node *x; | |
3699 | { | |
3700 | while (x != mem_root && x->color == MEM_BLACK) | |
3701 | { | |
3702 | if (x == x->parent->left) | |
3703 | { | |
3704 | struct mem_node *w = x->parent->right; | |
177c0ea7 | 3705 | |
34400008 GM |
3706 | if (w->color == MEM_RED) |
3707 | { | |
3708 | w->color = MEM_BLACK; | |
3709 | x->parent->color = MEM_RED; | |
3710 | mem_rotate_left (x->parent); | |
3711 | w = x->parent->right; | |
3712 | } | |
177c0ea7 | 3713 | |
34400008 GM |
3714 | if (w->left->color == MEM_BLACK && w->right->color == MEM_BLACK) |
3715 | { | |
3716 | w->color = MEM_RED; | |
3717 | x = x->parent; | |
3718 | } | |
3719 | else | |
3720 | { | |
3721 | if (w->right->color == MEM_BLACK) | |
3722 | { | |
3723 | w->left->color = MEM_BLACK; | |
3724 | w->color = MEM_RED; | |
3725 | mem_rotate_right (w); | |
3726 | w = x->parent->right; | |
3727 | } | |
3728 | w->color = x->parent->color; | |
3729 | x->parent->color = MEM_BLACK; | |
3730 | w->right->color = MEM_BLACK; | |
3731 | mem_rotate_left (x->parent); | |
3732 | x = mem_root; | |
3733 | } | |
3734 | } | |
3735 | else | |
3736 | { | |
3737 | struct mem_node *w = x->parent->left; | |
177c0ea7 | 3738 | |
34400008 GM |
3739 | if (w->color == MEM_RED) |
3740 | { | |
3741 | w->color = MEM_BLACK; | |
3742 | x->parent->color = MEM_RED; | |
3743 | mem_rotate_right (x->parent); | |
3744 | w = x->parent->left; | |
3745 | } | |
177c0ea7 | 3746 | |
34400008 GM |
3747 | if (w->right->color == MEM_BLACK && w->left->color == MEM_BLACK) |
3748 | { | |
3749 | w->color = MEM_RED; | |
3750 | x = x->parent; | |
3751 | } | |
3752 | else | |
3753 | { | |
3754 | if (w->left->color == MEM_BLACK) | |
3755 | { | |
3756 | w->right->color = MEM_BLACK; | |
3757 | w->color = MEM_RED; | |
3758 | mem_rotate_left (w); | |
3759 | w = x->parent->left; | |
3760 | } | |
177c0ea7 | 3761 | |
34400008 GM |
3762 | w->color = x->parent->color; |
3763 | x->parent->color = MEM_BLACK; | |
3764 | w->left->color = MEM_BLACK; | |
3765 | mem_rotate_right (x->parent); | |
3766 | x = mem_root; | |
3767 | } | |
3768 | } | |
3769 | } | |
177c0ea7 | 3770 | |
34400008 GM |
3771 | x->color = MEM_BLACK; |
3772 | } | |
3773 | ||
3774 | ||
3775 | /* Value is non-zero if P is a pointer to a live Lisp string on | |
3776 | the heap. M is a pointer to the mem_block for P. */ | |
3777 | ||
3778 | static INLINE int | |
3779 | live_string_p (m, p) | |
3780 | struct mem_node *m; | |
3781 | void *p; | |
3782 | { | |
3783 | if (m->type == MEM_TYPE_STRING) | |
3784 | { | |
3785 | struct string_block *b = (struct string_block *) m->start; | |
3786 | int offset = (char *) p - (char *) &b->strings[0]; | |
3787 | ||
3788 | /* P must point to the start of a Lisp_String structure, and it | |
3789 | must not be on the free-list. */ | |
176bc847 GM |
3790 | return (offset >= 0 |
3791 | && offset % sizeof b->strings[0] == 0 | |
d05b383a | 3792 | && offset < (STRING_BLOCK_SIZE * sizeof b->strings[0]) |
34400008 GM |
3793 | && ((struct Lisp_String *) p)->data != NULL); |
3794 | } | |
3795 | else | |
3796 | return 0; | |
3797 | } | |
3798 | ||
3799 | ||
3800 | /* Value is non-zero if P is a pointer to a live Lisp cons on | |
3801 | the heap. M is a pointer to the mem_block for P. */ | |
3802 | ||
3803 | static INLINE int | |
3804 | live_cons_p (m, p) | |
3805 | struct mem_node *m; | |
3806 | void *p; | |
3807 | { | |
3808 | if (m->type == MEM_TYPE_CONS) | |
3809 | { | |
3810 | struct cons_block *b = (struct cons_block *) m->start; | |
3811 | int offset = (char *) p - (char *) &b->conses[0]; | |
3812 | ||
3813 | /* P must point to the start of a Lisp_Cons, not be | |
3814 | one of the unused cells in the current cons block, | |
3815 | and not be on the free-list. */ | |
176bc847 GM |
3816 | return (offset >= 0 |
3817 | && offset % sizeof b->conses[0] == 0 | |
d05b383a | 3818 | && offset < (CONS_BLOCK_SIZE * sizeof b->conses[0]) |
34400008 GM |
3819 | && (b != cons_block |
3820 | || offset / sizeof b->conses[0] < cons_block_index) | |
3821 | && !EQ (((struct Lisp_Cons *) p)->car, Vdead)); | |
3822 | } | |
3823 | else | |
3824 | return 0; | |
3825 | } | |
3826 | ||
3827 | ||
3828 | /* Value is non-zero if P is a pointer to a live Lisp symbol on | |
3829 | the heap. M is a pointer to the mem_block for P. */ | |
3830 | ||
3831 | static INLINE int | |
3832 | live_symbol_p (m, p) | |
3833 | struct mem_node *m; | |
3834 | void *p; | |
3835 | { | |
3836 | if (m->type == MEM_TYPE_SYMBOL) | |
3837 | { | |
3838 | struct symbol_block *b = (struct symbol_block *) m->start; | |
3839 | int offset = (char *) p - (char *) &b->symbols[0]; | |
177c0ea7 | 3840 | |
34400008 GM |
3841 | /* P must point to the start of a Lisp_Symbol, not be |
3842 | one of the unused cells in the current symbol block, | |
3843 | and not be on the free-list. */ | |
176bc847 GM |
3844 | return (offset >= 0 |
3845 | && offset % sizeof b->symbols[0] == 0 | |
d05b383a | 3846 | && offset < (SYMBOL_BLOCK_SIZE * sizeof b->symbols[0]) |
34400008 GM |
3847 | && (b != symbol_block |
3848 | || offset / sizeof b->symbols[0] < symbol_block_index) | |
3849 | && !EQ (((struct Lisp_Symbol *) p)->function, Vdead)); | |
3850 | } | |
3851 | else | |
3852 | return 0; | |
3853 | } | |
3854 | ||
3855 | ||
3856 | /* Value is non-zero if P is a pointer to a live Lisp float on | |
3857 | the heap. M is a pointer to the mem_block for P. */ | |
3858 | ||
3859 | static INLINE int | |
3860 | live_float_p (m, p) | |
3861 | struct mem_node *m; | |
3862 | void *p; | |
3863 | { | |
3864 | if (m->type == MEM_TYPE_FLOAT) | |
3865 | { | |
3866 | struct float_block *b = (struct float_block *) m->start; | |
3867 | int offset = (char *) p - (char *) &b->floats[0]; | |
177c0ea7 | 3868 | |
ab6780cd SM |
3869 | /* P must point to the start of a Lisp_Float and not be |
3870 | one of the unused cells in the current float block. */ | |
176bc847 GM |
3871 | return (offset >= 0 |
3872 | && offset % sizeof b->floats[0] == 0 | |
d05b383a | 3873 | && offset < (FLOAT_BLOCK_SIZE * sizeof b->floats[0]) |
34400008 | 3874 | && (b != float_block |
ab6780cd | 3875 | || offset / sizeof b->floats[0] < float_block_index)); |
34400008 GM |
3876 | } |
3877 | else | |
3878 | return 0; | |
3879 | } | |
3880 | ||
3881 | ||
3882 | /* Value is non-zero if P is a pointer to a live Lisp Misc on | |
3883 | the heap. M is a pointer to the mem_block for P. */ | |
3884 | ||
3885 | static INLINE int | |
3886 | live_misc_p (m, p) | |
3887 | struct mem_node *m; | |
3888 | void *p; | |
3889 | { | |
3890 | if (m->type == MEM_TYPE_MISC) | |
3891 | { | |
3892 | struct marker_block *b = (struct marker_block *) m->start; | |
3893 | int offset = (char *) p - (char *) &b->markers[0]; | |
177c0ea7 | 3894 | |
34400008 GM |
3895 | /* P must point to the start of a Lisp_Misc, not be |
3896 | one of the unused cells in the current misc block, | |
3897 | and not be on the free-list. */ | |
176bc847 GM |
3898 | return (offset >= 0 |
3899 | && offset % sizeof b->markers[0] == 0 | |
d05b383a | 3900 | && offset < (MARKER_BLOCK_SIZE * sizeof b->markers[0]) |
34400008 GM |
3901 | && (b != marker_block |
3902 | || offset / sizeof b->markers[0] < marker_block_index) | |
3903 | && ((union Lisp_Misc *) p)->u_marker.type != Lisp_Misc_Free); | |
3904 | } | |
3905 | else | |
3906 | return 0; | |
3907 | } | |
3908 | ||
3909 | ||
3910 | /* Value is non-zero if P is a pointer to a live vector-like object. | |
3911 | M is a pointer to the mem_block for P. */ | |
3912 | ||
3913 | static INLINE int | |
3914 | live_vector_p (m, p) | |
3915 | struct mem_node *m; | |
3916 | void *p; | |
3917 | { | |
ece93c02 GM |
3918 | return (p == m->start |
3919 | && m->type >= MEM_TYPE_VECTOR | |
3920 | && m->type <= MEM_TYPE_WINDOW); | |
34400008 GM |
3921 | } |
3922 | ||
3923 | ||
2336fe58 | 3924 | /* Value is non-zero if P is a pointer to a live buffer. M is a |
34400008 GM |
3925 | pointer to the mem_block for P. */ |
3926 | ||
3927 | static INLINE int | |
3928 | live_buffer_p (m, p) | |
3929 | struct mem_node *m; | |
3930 | void *p; | |
3931 | { | |
3932 | /* P must point to the start of the block, and the buffer | |
3933 | must not have been killed. */ | |
3934 | return (m->type == MEM_TYPE_BUFFER | |
3935 | && p == m->start | |
3936 | && !NILP (((struct buffer *) p)->name)); | |
3937 | } | |
3938 | ||
13c844fb GM |
3939 | #endif /* GC_MARK_STACK || defined GC_MALLOC_CHECK */ |
3940 | ||
3941 | #if GC_MARK_STACK | |
3942 | ||
34400008 GM |
3943 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
3944 | ||
3945 | /* Array of objects that are kept alive because the C stack contains | |
3946 | a pattern that looks like a reference to them . */ | |
3947 | ||
3948 | #define MAX_ZOMBIES 10 | |
3949 | static Lisp_Object zombies[MAX_ZOMBIES]; | |
3950 | ||
3951 | /* Number of zombie objects. */ | |
3952 | ||
3953 | static int nzombies; | |
3954 | ||
3955 | /* Number of garbage collections. */ | |
3956 | ||
3957 | static int ngcs; | |
3958 | ||
3959 | /* Average percentage of zombies per collection. */ | |
3960 | ||
3961 | static double avg_zombies; | |
3962 | ||
3963 | /* Max. number of live and zombie objects. */ | |
3964 | ||
3965 | static int max_live, max_zombies; | |
3966 | ||
3967 | /* Average number of live objects per GC. */ | |
3968 | ||
3969 | static double avg_live; | |
3970 | ||
3971 | DEFUN ("gc-status", Fgc_status, Sgc_status, 0, 0, "", | |
7ee72033 MB |
3972 | doc: /* Show information about live and zombie objects. */) |
3973 | () | |
34400008 | 3974 | { |
83fc9c63 DL |
3975 | Lisp_Object args[8], zombie_list = Qnil; |
3976 | int i; | |
3977 | for (i = 0; i < nzombies; i++) | |
3978 | zombie_list = Fcons (zombies[i], zombie_list); | |
3979 | args[0] = build_string ("%d GCs, avg live/zombies = %.2f/%.2f (%f%%), max %d/%d\nzombies: %S"); | |
34400008 GM |
3980 | args[1] = make_number (ngcs); |
3981 | args[2] = make_float (avg_live); | |
3982 | args[3] = make_float (avg_zombies); | |
3983 | args[4] = make_float (avg_zombies / avg_live / 100); | |
3984 | args[5] = make_number (max_live); | |
3985 | args[6] = make_number (max_zombies); | |
83fc9c63 DL |
3986 | args[7] = zombie_list; |
3987 | return Fmessage (8, args); | |
34400008 GM |
3988 | } |
3989 | ||
3990 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
3991 | ||
3992 | ||
182ff242 GM |
3993 | /* Mark OBJ if we can prove it's a Lisp_Object. */ |
3994 | ||
3995 | static INLINE void | |
3996 | mark_maybe_object (obj) | |
3997 | Lisp_Object obj; | |
3998 | { | |
3999 | void *po = (void *) XPNTR (obj); | |
4000 | struct mem_node *m = mem_find (po); | |
177c0ea7 | 4001 | |
182ff242 GM |
4002 | if (m != MEM_NIL) |
4003 | { | |
4004 | int mark_p = 0; | |
4005 | ||
4006 | switch (XGCTYPE (obj)) | |
4007 | { | |
4008 | case Lisp_String: | |
4009 | mark_p = (live_string_p (m, po) | |
4010 | && !STRING_MARKED_P ((struct Lisp_String *) po)); | |
4011 | break; | |
4012 | ||
4013 | case Lisp_Cons: | |
08b7c2cb | 4014 | mark_p = (live_cons_p (m, po) && !CONS_MARKED_P (XCONS (obj))); |
182ff242 GM |
4015 | break; |
4016 | ||
4017 | case Lisp_Symbol: | |
2336fe58 | 4018 | mark_p = (live_symbol_p (m, po) && !XSYMBOL (obj)->gcmarkbit); |
182ff242 GM |
4019 | break; |
4020 | ||
4021 | case Lisp_Float: | |
ab6780cd | 4022 | mark_p = (live_float_p (m, po) && !FLOAT_MARKED_P (XFLOAT (obj))); |
182ff242 GM |
4023 | break; |
4024 | ||
4025 | case Lisp_Vectorlike: | |
4026 | /* Note: can't check GC_BUFFERP before we know it's a | |
4027 | buffer because checking that dereferences the pointer | |
4028 | PO which might point anywhere. */ | |
4029 | if (live_vector_p (m, po)) | |
3ef06d12 | 4030 | mark_p = !GC_SUBRP (obj) && !VECTOR_MARKED_P (XVECTOR (obj)); |
182ff242 | 4031 | else if (live_buffer_p (m, po)) |
3ef06d12 | 4032 | mark_p = GC_BUFFERP (obj) && !VECTOR_MARKED_P (XBUFFER (obj)); |
182ff242 GM |
4033 | break; |
4034 | ||
4035 | case Lisp_Misc: | |
2336fe58 | 4036 | mark_p = (live_misc_p (m, po) && !XMARKER (obj)->gcmarkbit); |
182ff242 | 4037 | break; |
6bbd7a29 GM |
4038 | |
4039 | case Lisp_Int: | |
31d929e5 | 4040 | case Lisp_Type_Limit: |
6bbd7a29 | 4041 | break; |
182ff242 GM |
4042 | } |
4043 | ||
4044 | if (mark_p) | |
4045 | { | |
4046 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4047 | if (nzombies < MAX_ZOMBIES) | |
83fc9c63 | 4048 | zombies[nzombies] = obj; |
182ff242 GM |
4049 | ++nzombies; |
4050 | #endif | |
49723c04 | 4051 | mark_object (obj); |
182ff242 GM |
4052 | } |
4053 | } | |
4054 | } | |
ece93c02 GM |
4055 | |
4056 | ||
4057 | /* If P points to Lisp data, mark that as live if it isn't already | |
4058 | marked. */ | |
4059 | ||
4060 | static INLINE void | |
4061 | mark_maybe_pointer (p) | |
4062 | void *p; | |
4063 | { | |
4064 | struct mem_node *m; | |
4065 | ||
4066 | /* Quickly rule out some values which can't point to Lisp data. We | |
4067 | assume that Lisp data is aligned on even addresses. */ | |
4068 | if ((EMACS_INT) p & 1) | |
4069 | return; | |
177c0ea7 | 4070 | |
ece93c02 GM |
4071 | m = mem_find (p); |
4072 | if (m != MEM_NIL) | |
4073 | { | |
4074 | Lisp_Object obj = Qnil; | |
177c0ea7 | 4075 | |
ece93c02 GM |
4076 | switch (m->type) |
4077 | { | |
4078 | case MEM_TYPE_NON_LISP: | |
2fe50224 | 4079 | /* Nothing to do; not a pointer to Lisp memory. */ |
ece93c02 | 4080 | break; |
177c0ea7 | 4081 | |
ece93c02 | 4082 | case MEM_TYPE_BUFFER: |
3ef06d12 | 4083 | if (live_buffer_p (m, p) && !VECTOR_MARKED_P((struct buffer *)p)) |
ece93c02 GM |
4084 | XSETVECTOR (obj, p); |
4085 | break; | |
177c0ea7 | 4086 | |
ece93c02 | 4087 | case MEM_TYPE_CONS: |
08b7c2cb | 4088 | if (live_cons_p (m, p) && !CONS_MARKED_P ((struct Lisp_Cons *) p)) |
ece93c02 GM |
4089 | XSETCONS (obj, p); |
4090 | break; | |
177c0ea7 | 4091 | |
ece93c02 GM |
4092 | case MEM_TYPE_STRING: |
4093 | if (live_string_p (m, p) | |
4094 | && !STRING_MARKED_P ((struct Lisp_String *) p)) | |
4095 | XSETSTRING (obj, p); | |
4096 | break; | |
4097 | ||
4098 | case MEM_TYPE_MISC: | |
2336fe58 SM |
4099 | if (live_misc_p (m, p) && !((struct Lisp_Free *) p)->gcmarkbit) |
4100 | XSETMISC (obj, p); | |
ece93c02 | 4101 | break; |
177c0ea7 | 4102 | |
ece93c02 | 4103 | case MEM_TYPE_SYMBOL: |
2336fe58 | 4104 | if (live_symbol_p (m, p) && !((struct Lisp_Symbol *) p)->gcmarkbit) |
ece93c02 GM |
4105 | XSETSYMBOL (obj, p); |
4106 | break; | |
177c0ea7 | 4107 | |
ece93c02 | 4108 | case MEM_TYPE_FLOAT: |
ab6780cd | 4109 | if (live_float_p (m, p) && !FLOAT_MARKED_P (p)) |
ece93c02 GM |
4110 | XSETFLOAT (obj, p); |
4111 | break; | |
177c0ea7 | 4112 | |
ece93c02 GM |
4113 | case MEM_TYPE_VECTOR: |
4114 | case MEM_TYPE_PROCESS: | |
4115 | case MEM_TYPE_HASH_TABLE: | |
4116 | case MEM_TYPE_FRAME: | |
4117 | case MEM_TYPE_WINDOW: | |
4118 | if (live_vector_p (m, p)) | |
4119 | { | |
4120 | Lisp_Object tem; | |
4121 | XSETVECTOR (tem, p); | |
3ef06d12 | 4122 | if (!GC_SUBRP (tem) && !VECTOR_MARKED_P (XVECTOR (tem))) |
ece93c02 GM |
4123 | obj = tem; |
4124 | } | |
4125 | break; | |
4126 | ||
4127 | default: | |
4128 | abort (); | |
4129 | } | |
4130 | ||
4131 | if (!GC_NILP (obj)) | |
49723c04 | 4132 | mark_object (obj); |
ece93c02 GM |
4133 | } |
4134 | } | |
4135 | ||
4136 | ||
4137 | /* Mark Lisp objects referenced from the address range START..END. */ | |
34400008 | 4138 | |
177c0ea7 | 4139 | static void |
34400008 GM |
4140 | mark_memory (start, end) |
4141 | void *start, *end; | |
4142 | { | |
4143 | Lisp_Object *p; | |
ece93c02 | 4144 | void **pp; |
34400008 GM |
4145 | |
4146 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4147 | nzombies = 0; | |
4148 | #endif | |
4149 | ||
4150 | /* Make START the pointer to the start of the memory region, | |
4151 | if it isn't already. */ | |
4152 | if (end < start) | |
4153 | { | |
4154 | void *tem = start; | |
4155 | start = end; | |
4156 | end = tem; | |
4157 | } | |
ece93c02 GM |
4158 | |
4159 | /* Mark Lisp_Objects. */ | |
34400008 | 4160 | for (p = (Lisp_Object *) start; (void *) p < end; ++p) |
182ff242 | 4161 | mark_maybe_object (*p); |
ece93c02 GM |
4162 | |
4163 | /* Mark Lisp data pointed to. This is necessary because, in some | |
4164 | situations, the C compiler optimizes Lisp objects away, so that | |
4165 | only a pointer to them remains. Example: | |
4166 | ||
4167 | DEFUN ("testme", Ftestme, Stestme, 0, 0, 0, "") | |
7ee72033 | 4168 | () |
ece93c02 GM |
4169 | { |
4170 | Lisp_Object obj = build_string ("test"); | |
4171 | struct Lisp_String *s = XSTRING (obj); | |
4172 | Fgarbage_collect (); | |
4173 | fprintf (stderr, "test `%s'\n", s->data); | |
4174 | return Qnil; | |
4175 | } | |
4176 | ||
4177 | Here, `obj' isn't really used, and the compiler optimizes it | |
4178 | away. The only reference to the life string is through the | |
4179 | pointer `s'. */ | |
177c0ea7 | 4180 | |
ece93c02 GM |
4181 | for (pp = (void **) start; (void *) pp < end; ++pp) |
4182 | mark_maybe_pointer (*pp); | |
182ff242 GM |
4183 | } |
4184 | ||
30f637f8 DL |
4185 | /* setjmp will work with GCC unless NON_SAVING_SETJMP is defined in |
4186 | the GCC system configuration. In gcc 3.2, the only systems for | |
4187 | which this is so are i386-sco5 non-ELF, i386-sysv3 (maybe included | |
4188 | by others?) and ns32k-pc532-min. */ | |
182ff242 GM |
4189 | |
4190 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
4191 | ||
4192 | static int setjmp_tested_p, longjmps_done; | |
4193 | ||
4194 | #define SETJMP_WILL_LIKELY_WORK "\ | |
4195 | \n\ | |
4196 | Emacs garbage collector has been changed to use conservative stack\n\ | |
4197 | marking. Emacs has determined that the method it uses to do the\n\ | |
4198 | marking will likely work on your system, but this isn't sure.\n\ | |
4199 | \n\ | |
4200 | If you are a system-programmer, or can get the help of a local wizard\n\ | |
4201 | who is, please take a look at the function mark_stack in alloc.c, and\n\ | |
4202 | verify that the methods used are appropriate for your system.\n\ | |
4203 | \n\ | |
d191623b | 4204 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
4205 | " |
4206 | ||
4207 | #define SETJMP_WILL_NOT_WORK "\ | |
4208 | \n\ | |
4209 | Emacs garbage collector has been changed to use conservative stack\n\ | |
4210 | marking. Emacs has determined that the default method it uses to do the\n\ | |
4211 | marking will not work on your system. We will need a system-dependent\n\ | |
4212 | solution for your system.\n\ | |
4213 | \n\ | |
4214 | Please take a look at the function mark_stack in alloc.c, and\n\ | |
4215 | try to find a way to make it work on your system.\n\ | |
30f637f8 DL |
4216 | \n\ |
4217 | Note that you may get false negatives, depending on the compiler.\n\ | |
4218 | In particular, you need to use -O with GCC for this test.\n\ | |
4219 | \n\ | |
d191623b | 4220 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
4221 | " |
4222 | ||
4223 | ||
4224 | /* Perform a quick check if it looks like setjmp saves registers in a | |
4225 | jmp_buf. Print a message to stderr saying so. When this test | |
4226 | succeeds, this is _not_ a proof that setjmp is sufficient for | |
4227 | conservative stack marking. Only the sources or a disassembly | |
4228 | can prove that. */ | |
4229 | ||
4230 | static void | |
4231 | test_setjmp () | |
4232 | { | |
4233 | char buf[10]; | |
4234 | register int x; | |
4235 | jmp_buf jbuf; | |
4236 | int result = 0; | |
4237 | ||
4238 | /* Arrange for X to be put in a register. */ | |
4239 | sprintf (buf, "1"); | |
4240 | x = strlen (buf); | |
4241 | x = 2 * x - 1; | |
4242 | ||
4243 | setjmp (jbuf); | |
4244 | if (longjmps_done == 1) | |
34400008 | 4245 | { |
182ff242 | 4246 | /* Came here after the longjmp at the end of the function. |
34400008 | 4247 | |
182ff242 GM |
4248 | If x == 1, the longjmp has restored the register to its |
4249 | value before the setjmp, and we can hope that setjmp | |
4250 | saves all such registers in the jmp_buf, although that | |
4251 | isn't sure. | |
34400008 | 4252 | |
182ff242 GM |
4253 | For other values of X, either something really strange is |
4254 | taking place, or the setjmp just didn't save the register. */ | |
4255 | ||
4256 | if (x == 1) | |
4257 | fprintf (stderr, SETJMP_WILL_LIKELY_WORK); | |
4258 | else | |
4259 | { | |
4260 | fprintf (stderr, SETJMP_WILL_NOT_WORK); | |
4261 | exit (1); | |
34400008 GM |
4262 | } |
4263 | } | |
182ff242 GM |
4264 | |
4265 | ++longjmps_done; | |
4266 | x = 2; | |
4267 | if (longjmps_done == 1) | |
4268 | longjmp (jbuf, 1); | |
34400008 GM |
4269 | } |
4270 | ||
182ff242 GM |
4271 | #endif /* not GC_SAVE_REGISTERS_ON_STACK && not GC_SETJMP_WORKS */ |
4272 | ||
34400008 GM |
4273 | |
4274 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
4275 | ||
4276 | /* Abort if anything GCPRO'd doesn't survive the GC. */ | |
4277 | ||
4278 | static void | |
4279 | check_gcpros () | |
4280 | { | |
4281 | struct gcpro *p; | |
4282 | int i; | |
4283 | ||
4284 | for (p = gcprolist; p; p = p->next) | |
4285 | for (i = 0; i < p->nvars; ++i) | |
4286 | if (!survives_gc_p (p->var[i])) | |
92cc28b2 SM |
4287 | /* FIXME: It's not necessarily a bug. It might just be that the |
4288 | GCPRO is unnecessary or should release the object sooner. */ | |
34400008 GM |
4289 | abort (); |
4290 | } | |
4291 | ||
4292 | #elif GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4293 | ||
4294 | static void | |
4295 | dump_zombies () | |
4296 | { | |
4297 | int i; | |
4298 | ||
4299 | fprintf (stderr, "\nZombies kept alive = %d:\n", nzombies); | |
4300 | for (i = 0; i < min (MAX_ZOMBIES, nzombies); ++i) | |
4301 | { | |
4302 | fprintf (stderr, " %d = ", i); | |
4303 | debug_print (zombies[i]); | |
4304 | } | |
4305 | } | |
4306 | ||
4307 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
4308 | ||
4309 | ||
182ff242 GM |
4310 | /* Mark live Lisp objects on the C stack. |
4311 | ||
4312 | There are several system-dependent problems to consider when | |
4313 | porting this to new architectures: | |
4314 | ||
4315 | Processor Registers | |
4316 | ||
4317 | We have to mark Lisp objects in CPU registers that can hold local | |
4318 | variables or are used to pass parameters. | |
4319 | ||
4320 | If GC_SAVE_REGISTERS_ON_STACK is defined, it should expand to | |
4321 | something that either saves relevant registers on the stack, or | |
4322 | calls mark_maybe_object passing it each register's contents. | |
4323 | ||
4324 | If GC_SAVE_REGISTERS_ON_STACK is not defined, the current | |
4325 | implementation assumes that calling setjmp saves registers we need | |
4326 | to see in a jmp_buf which itself lies on the stack. This doesn't | |
4327 | have to be true! It must be verified for each system, possibly | |
4328 | by taking a look at the source code of setjmp. | |
4329 | ||
4330 | Stack Layout | |
4331 | ||
4332 | Architectures differ in the way their processor stack is organized. | |
4333 | For example, the stack might look like this | |
4334 | ||
4335 | +----------------+ | |
4336 | | Lisp_Object | size = 4 | |
4337 | +----------------+ | |
4338 | | something else | size = 2 | |
4339 | +----------------+ | |
4340 | | Lisp_Object | size = 4 | |
4341 | +----------------+ | |
4342 | | ... | | |
4343 | ||
4344 | In such a case, not every Lisp_Object will be aligned equally. To | |
4345 | find all Lisp_Object on the stack it won't be sufficient to walk | |
4346 | the stack in steps of 4 bytes. Instead, two passes will be | |
4347 | necessary, one starting at the start of the stack, and a second | |
4348 | pass starting at the start of the stack + 2. Likewise, if the | |
4349 | minimal alignment of Lisp_Objects on the stack is 1, four passes | |
4350 | would be necessary, each one starting with one byte more offset | |
4351 | from the stack start. | |
4352 | ||
4353 | The current code assumes by default that Lisp_Objects are aligned | |
4354 | equally on the stack. */ | |
34400008 GM |
4355 | |
4356 | static void | |
4357 | mark_stack () | |
4358 | { | |
630909a5 | 4359 | int i; |
34400008 | 4360 | jmp_buf j; |
6bbd7a29 | 4361 | volatile int stack_grows_down_p = (char *) &j > (char *) stack_base; |
34400008 GM |
4362 | void *end; |
4363 | ||
4364 | /* This trick flushes the register windows so that all the state of | |
4365 | the process is contained in the stack. */ | |
ab6780cd | 4366 | /* Fixme: Code in the Boehm GC suggests flushing (with `flushrs') is |
422eec7e DL |
4367 | needed on ia64 too. See mach_dep.c, where it also says inline |
4368 | assembler doesn't work with relevant proprietary compilers. */ | |
34400008 GM |
4369 | #ifdef sparc |
4370 | asm ("ta 3"); | |
4371 | #endif | |
177c0ea7 | 4372 | |
34400008 GM |
4373 | /* Save registers that we need to see on the stack. We need to see |
4374 | registers used to hold register variables and registers used to | |
4375 | pass parameters. */ | |
4376 | #ifdef GC_SAVE_REGISTERS_ON_STACK | |
4377 | GC_SAVE_REGISTERS_ON_STACK (end); | |
182ff242 | 4378 | #else /* not GC_SAVE_REGISTERS_ON_STACK */ |
177c0ea7 | 4379 | |
182ff242 GM |
4380 | #ifndef GC_SETJMP_WORKS /* If it hasn't been checked yet that |
4381 | setjmp will definitely work, test it | |
4382 | and print a message with the result | |
4383 | of the test. */ | |
4384 | if (!setjmp_tested_p) | |
4385 | { | |
4386 | setjmp_tested_p = 1; | |
4387 | test_setjmp (); | |
4388 | } | |
4389 | #endif /* GC_SETJMP_WORKS */ | |
177c0ea7 | 4390 | |
34400008 GM |
4391 | setjmp (j); |
4392 | end = stack_grows_down_p ? (char *) &j + sizeof j : (char *) &j; | |
182ff242 | 4393 | #endif /* not GC_SAVE_REGISTERS_ON_STACK */ |
34400008 GM |
4394 | |
4395 | /* This assumes that the stack is a contiguous region in memory. If | |
182ff242 GM |
4396 | that's not the case, something has to be done here to iterate |
4397 | over the stack segments. */ | |
630909a5 | 4398 | #ifndef GC_LISP_OBJECT_ALIGNMENT |
422eec7e DL |
4399 | #ifdef __GNUC__ |
4400 | #define GC_LISP_OBJECT_ALIGNMENT __alignof__ (Lisp_Object) | |
4401 | #else | |
630909a5 | 4402 | #define GC_LISP_OBJECT_ALIGNMENT sizeof (Lisp_Object) |
422eec7e | 4403 | #endif |
182ff242 | 4404 | #endif |
24452cd5 | 4405 | for (i = 0; i < sizeof (Lisp_Object); i += GC_LISP_OBJECT_ALIGNMENT) |
630909a5 | 4406 | mark_memory ((char *) stack_base + i, end); |
4dec23ff AS |
4407 | /* Allow for marking a secondary stack, like the register stack on the |
4408 | ia64. */ | |
4409 | #ifdef GC_MARK_SECONDARY_STACK | |
4410 | GC_MARK_SECONDARY_STACK (); | |
4411 | #endif | |
34400008 GM |
4412 | |
4413 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
4414 | check_gcpros (); | |
4415 | #endif | |
4416 | } | |
4417 | ||
4418 | ||
4419 | #endif /* GC_MARK_STACK != 0 */ | |
4420 | ||
4421 | ||
4422 | \f | |
2e471eb5 GM |
4423 | /*********************************************************************** |
4424 | Pure Storage Management | |
4425 | ***********************************************************************/ | |
4426 | ||
1f0b3fd2 GM |
4427 | /* Allocate room for SIZE bytes from pure Lisp storage and return a |
4428 | pointer to it. TYPE is the Lisp type for which the memory is | |
4429 | allocated. TYPE < 0 means it's not used for a Lisp object. | |
4430 | ||
4431 | If store_pure_type_info is set and TYPE is >= 0, the type of | |
4432 | the allocated object is recorded in pure_types. */ | |
4433 | ||
4434 | static POINTER_TYPE * | |
4435 | pure_alloc (size, type) | |
4436 | size_t size; | |
4437 | int type; | |
4438 | { | |
1f0b3fd2 | 4439 | POINTER_TYPE *result; |
831b476c SM |
4440 | #ifdef USE_LSB_TAG |
4441 | size_t alignment = (1 << GCTYPEBITS); | |
4442 | #else | |
44117420 | 4443 | size_t alignment = sizeof (EMACS_INT); |
1f0b3fd2 GM |
4444 | |
4445 | /* Give Lisp_Floats an extra alignment. */ | |
4446 | if (type == Lisp_Float) | |
4447 | { | |
1f0b3fd2 GM |
4448 | #if defined __GNUC__ && __GNUC__ >= 2 |
4449 | alignment = __alignof (struct Lisp_Float); | |
4450 | #else | |
4451 | alignment = sizeof (struct Lisp_Float); | |
4452 | #endif | |
9e713715 | 4453 | } |
831b476c | 4454 | #endif |
1f0b3fd2 | 4455 | |
44117420 | 4456 | again: |
ab6780cd | 4457 | result = ALIGN (purebeg + pure_bytes_used, alignment); |
44117420 KS |
4458 | pure_bytes_used = ((char *)result - (char *)purebeg) + size; |
4459 | ||
4460 | if (pure_bytes_used <= pure_size) | |
4461 | return result; | |
4462 | ||
4463 | /* Don't allocate a large amount here, | |
4464 | because it might get mmap'd and then its address | |
4465 | might not be usable. */ | |
4466 | purebeg = (char *) xmalloc (10000); | |
4467 | pure_size = 10000; | |
4468 | pure_bytes_used_before_overflow += pure_bytes_used - size; | |
4469 | pure_bytes_used = 0; | |
4470 | goto again; | |
1f0b3fd2 GM |
4471 | } |
4472 | ||
4473 | ||
852f8cdc | 4474 | /* Print a warning if PURESIZE is too small. */ |
9e713715 GM |
4475 | |
4476 | void | |
4477 | check_pure_size () | |
4478 | { | |
4479 | if (pure_bytes_used_before_overflow) | |
a4d35afd SM |
4480 | message ("Pure Lisp storage overflow (approx. %d bytes needed)", |
4481 | (int) (pure_bytes_used + pure_bytes_used_before_overflow)); | |
9e713715 GM |
4482 | } |
4483 | ||
4484 | ||
2e471eb5 GM |
4485 | /* Return a string allocated in pure space. DATA is a buffer holding |
4486 | NCHARS characters, and NBYTES bytes of string data. MULTIBYTE | |
4487 | non-zero means make the result string multibyte. | |
1a4f1e2c | 4488 | |
2e471eb5 GM |
4489 | Must get an error if pure storage is full, since if it cannot hold |
4490 | a large string it may be able to hold conses that point to that | |
4491 | string; then the string is not protected from gc. */ | |
7146af97 JB |
4492 | |
4493 | Lisp_Object | |
2e471eb5 | 4494 | make_pure_string (data, nchars, nbytes, multibyte) |
7146af97 | 4495 | char *data; |
2e471eb5 | 4496 | int nchars, nbytes; |
c0696668 | 4497 | int multibyte; |
7146af97 | 4498 | { |
2e471eb5 GM |
4499 | Lisp_Object string; |
4500 | struct Lisp_String *s; | |
c0696668 | 4501 | |
1f0b3fd2 GM |
4502 | s = (struct Lisp_String *) pure_alloc (sizeof *s, Lisp_String); |
4503 | s->data = (unsigned char *) pure_alloc (nbytes + 1, -1); | |
2e471eb5 GM |
4504 | s->size = nchars; |
4505 | s->size_byte = multibyte ? nbytes : -1; | |
4506 | bcopy (data, s->data, nbytes); | |
4507 | s->data[nbytes] = '\0'; | |
4508 | s->intervals = NULL_INTERVAL; | |
2e471eb5 GM |
4509 | XSETSTRING (string, s); |
4510 | return string; | |
7146af97 JB |
4511 | } |
4512 | ||
2e471eb5 | 4513 | |
34400008 GM |
4514 | /* Return a cons allocated from pure space. Give it pure copies |
4515 | of CAR as car and CDR as cdr. */ | |
4516 | ||
7146af97 JB |
4517 | Lisp_Object |
4518 | pure_cons (car, cdr) | |
4519 | Lisp_Object car, cdr; | |
4520 | { | |
4521 | register Lisp_Object new; | |
1f0b3fd2 | 4522 | struct Lisp_Cons *p; |
7146af97 | 4523 | |
1f0b3fd2 GM |
4524 | p = (struct Lisp_Cons *) pure_alloc (sizeof *p, Lisp_Cons); |
4525 | XSETCONS (new, p); | |
f3fbd155 KR |
4526 | XSETCAR (new, Fpurecopy (car)); |
4527 | XSETCDR (new, Fpurecopy (cdr)); | |
7146af97 JB |
4528 | return new; |
4529 | } | |
4530 | ||
7146af97 | 4531 | |
34400008 GM |
4532 | /* Value is a float object with value NUM allocated from pure space. */ |
4533 | ||
7146af97 JB |
4534 | Lisp_Object |
4535 | make_pure_float (num) | |
4536 | double num; | |
4537 | { | |
4538 | register Lisp_Object new; | |
1f0b3fd2 | 4539 | struct Lisp_Float *p; |
7146af97 | 4540 | |
1f0b3fd2 GM |
4541 | p = (struct Lisp_Float *) pure_alloc (sizeof *p, Lisp_Float); |
4542 | XSETFLOAT (new, p); | |
70949dac | 4543 | XFLOAT_DATA (new) = num; |
7146af97 JB |
4544 | return new; |
4545 | } | |
4546 | ||
34400008 GM |
4547 | |
4548 | /* Return a vector with room for LEN Lisp_Objects allocated from | |
4549 | pure space. */ | |
4550 | ||
7146af97 JB |
4551 | Lisp_Object |
4552 | make_pure_vector (len) | |
42607681 | 4553 | EMACS_INT len; |
7146af97 | 4554 | { |
1f0b3fd2 GM |
4555 | Lisp_Object new; |
4556 | struct Lisp_Vector *p; | |
4557 | size_t size = sizeof *p + (len - 1) * sizeof (Lisp_Object); | |
7146af97 | 4558 | |
1f0b3fd2 GM |
4559 | p = (struct Lisp_Vector *) pure_alloc (size, Lisp_Vectorlike); |
4560 | XSETVECTOR (new, p); | |
7146af97 JB |
4561 | XVECTOR (new)->size = len; |
4562 | return new; | |
4563 | } | |
4564 | ||
34400008 | 4565 | |
7146af97 | 4566 | DEFUN ("purecopy", Fpurecopy, Spurecopy, 1, 1, 0, |
7ee72033 | 4567 | doc: /* Make a copy of OBJECT in pure storage. |
228299fa | 4568 | Recursively copies contents of vectors and cons cells. |
7ee72033 MB |
4569 | Does not copy symbols. Copies strings without text properties. */) |
4570 | (obj) | |
7146af97 JB |
4571 | register Lisp_Object obj; |
4572 | { | |
265a9e55 | 4573 | if (NILP (Vpurify_flag)) |
7146af97 JB |
4574 | return obj; |
4575 | ||
1f0b3fd2 | 4576 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
4577 | return obj; |
4578 | ||
d6dd74bb | 4579 | if (CONSP (obj)) |
70949dac | 4580 | return pure_cons (XCAR (obj), XCDR (obj)); |
d6dd74bb | 4581 | else if (FLOATP (obj)) |
70949dac | 4582 | return make_pure_float (XFLOAT_DATA (obj)); |
d6dd74bb | 4583 | else if (STRINGP (obj)) |
d5db4077 KR |
4584 | return make_pure_string (SDATA (obj), SCHARS (obj), |
4585 | SBYTES (obj), | |
c0696668 | 4586 | STRING_MULTIBYTE (obj)); |
d6dd74bb KH |
4587 | else if (COMPILEDP (obj) || VECTORP (obj)) |
4588 | { | |
4589 | register struct Lisp_Vector *vec; | |
41b867ea AS |
4590 | register int i; |
4591 | EMACS_INT size; | |
d6dd74bb KH |
4592 | |
4593 | size = XVECTOR (obj)->size; | |
7d535c68 KH |
4594 | if (size & PSEUDOVECTOR_FLAG) |
4595 | size &= PSEUDOVECTOR_SIZE_MASK; | |
41b867ea | 4596 | vec = XVECTOR (make_pure_vector (size)); |
d6dd74bb KH |
4597 | for (i = 0; i < size; i++) |
4598 | vec->contents[i] = Fpurecopy (XVECTOR (obj)->contents[i]); | |
4599 | if (COMPILEDP (obj)) | |
4600 | XSETCOMPILED (obj, vec); | |
4601 | else | |
4602 | XSETVECTOR (obj, vec); | |
7146af97 JB |
4603 | return obj; |
4604 | } | |
d6dd74bb KH |
4605 | else if (MARKERP (obj)) |
4606 | error ("Attempt to copy a marker to pure storage"); | |
6bbd7a29 GM |
4607 | |
4608 | return obj; | |
7146af97 | 4609 | } |
2e471eb5 | 4610 | |
34400008 | 4611 | |
7146af97 | 4612 | \f |
34400008 GM |
4613 | /*********************************************************************** |
4614 | Protection from GC | |
4615 | ***********************************************************************/ | |
4616 | ||
2e471eb5 GM |
4617 | /* Put an entry in staticvec, pointing at the variable with address |
4618 | VARADDRESS. */ | |
7146af97 JB |
4619 | |
4620 | void | |
4621 | staticpro (varaddress) | |
4622 | Lisp_Object *varaddress; | |
4623 | { | |
4624 | staticvec[staticidx++] = varaddress; | |
4625 | if (staticidx >= NSTATICS) | |
4626 | abort (); | |
4627 | } | |
4628 | ||
4629 | struct catchtag | |
2e471eb5 | 4630 | { |
7146af97 JB |
4631 | Lisp_Object tag; |
4632 | Lisp_Object val; | |
4633 | struct catchtag *next; | |
2e471eb5 | 4634 | }; |
7146af97 | 4635 | |
7146af97 | 4636 | \f |
34400008 GM |
4637 | /*********************************************************************** |
4638 | Protection from GC | |
4639 | ***********************************************************************/ | |
1a4f1e2c | 4640 | |
e8197642 RS |
4641 | /* Temporarily prevent garbage collection. */ |
4642 | ||
4643 | int | |
4644 | inhibit_garbage_collection () | |
4645 | { | |
aed13378 | 4646 | int count = SPECPDL_INDEX (); |
54defd0d AS |
4647 | int nbits = min (VALBITS, BITS_PER_INT); |
4648 | ||
4649 | specbind (Qgc_cons_threshold, make_number (((EMACS_INT) 1 << (nbits - 1)) - 1)); | |
e8197642 RS |
4650 | return count; |
4651 | } | |
4652 | ||
34400008 | 4653 | |
7146af97 | 4654 | DEFUN ("garbage-collect", Fgarbage_collect, Sgarbage_collect, 0, 0, "", |
7ee72033 | 4655 | doc: /* Reclaim storage for Lisp objects no longer needed. |
e1e37596 RS |
4656 | Garbage collection happens automatically if you cons more than |
4657 | `gc-cons-threshold' bytes of Lisp data since previous garbage collection. | |
4658 | `garbage-collect' normally returns a list with info on amount of space in use: | |
228299fa GM |
4659 | ((USED-CONSES . FREE-CONSES) (USED-SYMS . FREE-SYMS) |
4660 | (USED-MARKERS . FREE-MARKERS) USED-STRING-CHARS USED-VECTOR-SLOTS | |
4661 | (USED-FLOATS . FREE-FLOATS) (USED-INTERVALS . FREE-INTERVALS) | |
4662 | (USED-STRINGS . FREE-STRINGS)) | |
e1e37596 RS |
4663 | However, if there was overflow in pure space, `garbage-collect' |
4664 | returns nil, because real GC can't be done. */) | |
7ee72033 | 4665 | () |
7146af97 | 4666 | { |
7146af97 JB |
4667 | register struct specbinding *bind; |
4668 | struct catchtag *catch; | |
4669 | struct handler *handler; | |
7146af97 JB |
4670 | char stack_top_variable; |
4671 | register int i; | |
6efc7df7 | 4672 | int message_p; |
96117bc7 | 4673 | Lisp_Object total[8]; |
331379bf | 4674 | int count = SPECPDL_INDEX (); |
2c5bd608 DL |
4675 | EMACS_TIME t1, t2, t3; |
4676 | ||
3de0effb RS |
4677 | if (abort_on_gc) |
4678 | abort (); | |
4679 | ||
9e713715 GM |
4680 | /* Can't GC if pure storage overflowed because we can't determine |
4681 | if something is a pure object or not. */ | |
4682 | if (pure_bytes_used_before_overflow) | |
4683 | return Qnil; | |
4684 | ||
3c7e66a8 RS |
4685 | /* Don't keep undo information around forever. |
4686 | Do this early on, so it is no problem if the user quits. */ | |
4687 | { | |
4688 | register struct buffer *nextb = all_buffers; | |
4689 | ||
4690 | while (nextb) | |
4691 | { | |
4692 | /* If a buffer's undo list is Qt, that means that undo is | |
4693 | turned off in that buffer. Calling truncate_undo_list on | |
4694 | Qt tends to return NULL, which effectively turns undo back on. | |
4695 | So don't call truncate_undo_list if undo_list is Qt. */ | |
303b0412 | 4696 | if (! NILP (nextb->name) && ! EQ (nextb->undo_list, Qt)) |
3c7e66a8 RS |
4697 | truncate_undo_list (nextb); |
4698 | ||
4699 | /* Shrink buffer gaps, but skip indirect and dead buffers. */ | |
4700 | if (nextb->base_buffer == 0 && !NILP (nextb->name)) | |
4701 | { | |
4702 | /* If a buffer's gap size is more than 10% of the buffer | |
4703 | size, or larger than 2000 bytes, then shrink it | |
4704 | accordingly. Keep a minimum size of 20 bytes. */ | |
4705 | int size = min (2000, max (20, (nextb->text->z_byte / 10))); | |
4706 | ||
4707 | if (nextb->text->gap_size > size) | |
4708 | { | |
4709 | struct buffer *save_current = current_buffer; | |
4710 | current_buffer = nextb; | |
4711 | make_gap (-(nextb->text->gap_size - size)); | |
4712 | current_buffer = save_current; | |
4713 | } | |
4714 | } | |
4715 | ||
4716 | nextb = nextb->next; | |
4717 | } | |
4718 | } | |
4719 | ||
4720 | EMACS_GET_TIME (t1); | |
4721 | ||
58595309 KH |
4722 | /* In case user calls debug_print during GC, |
4723 | don't let that cause a recursive GC. */ | |
4724 | consing_since_gc = 0; | |
4725 | ||
6efc7df7 GM |
4726 | /* Save what's currently displayed in the echo area. */ |
4727 | message_p = push_message (); | |
c55b0da6 | 4728 | record_unwind_protect (pop_message_unwind, Qnil); |
41c28a37 | 4729 | |
7146af97 JB |
4730 | /* Save a copy of the contents of the stack, for debugging. */ |
4731 | #if MAX_SAVE_STACK > 0 | |
265a9e55 | 4732 | if (NILP (Vpurify_flag)) |
7146af97 JB |
4733 | { |
4734 | i = &stack_top_variable - stack_bottom; | |
4735 | if (i < 0) i = -i; | |
4736 | if (i < MAX_SAVE_STACK) | |
4737 | { | |
4738 | if (stack_copy == 0) | |
9ac0d9e0 | 4739 | stack_copy = (char *) xmalloc (stack_copy_size = i); |
7146af97 | 4740 | else if (stack_copy_size < i) |
9ac0d9e0 | 4741 | stack_copy = (char *) xrealloc (stack_copy, (stack_copy_size = i)); |
7146af97 JB |
4742 | if (stack_copy) |
4743 | { | |
42607681 | 4744 | if ((EMACS_INT) (&stack_top_variable - stack_bottom) > 0) |
7146af97 JB |
4745 | bcopy (stack_bottom, stack_copy, i); |
4746 | else | |
4747 | bcopy (&stack_top_variable, stack_copy, i); | |
4748 | } | |
4749 | } | |
4750 | } | |
4751 | #endif /* MAX_SAVE_STACK > 0 */ | |
4752 | ||
299585ee | 4753 | if (garbage_collection_messages) |
691c4285 | 4754 | message1_nolog ("Garbage collecting..."); |
7146af97 | 4755 | |
6e0fca1d RS |
4756 | BLOCK_INPUT; |
4757 | ||
eec7b73d RS |
4758 | shrink_regexp_cache (); |
4759 | ||
7146af97 JB |
4760 | gc_in_progress = 1; |
4761 | ||
c23baf9f | 4762 | /* clear_marks (); */ |
7146af97 | 4763 | |
0930c1a1 | 4764 | /* Mark all the special slots that serve as the roots of accessibility. */ |
7146af97 JB |
4765 | |
4766 | for (i = 0; i < staticidx; i++) | |
49723c04 | 4767 | mark_object (*staticvec[i]); |
34400008 | 4768 | |
126f9c02 SM |
4769 | for (bind = specpdl; bind != specpdl_ptr; bind++) |
4770 | { | |
4771 | mark_object (bind->symbol); | |
4772 | mark_object (bind->old_value); | |
4773 | } | |
4774 | mark_kboards (); | |
4775 | ||
4776 | #ifdef USE_GTK | |
4777 | { | |
4778 | extern void xg_mark_data (); | |
4779 | xg_mark_data (); | |
4780 | } | |
4781 | #endif | |
4782 | ||
34400008 GM |
4783 | #if (GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS \ |
4784 | || GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS) | |
4785 | mark_stack (); | |
4786 | #else | |
acf5f7d3 SM |
4787 | { |
4788 | register struct gcpro *tail; | |
4789 | for (tail = gcprolist; tail; tail = tail->next) | |
4790 | for (i = 0; i < tail->nvars; i++) | |
0930c1a1 | 4791 | mark_object (tail->var[i]); |
acf5f7d3 | 4792 | } |
34400008 | 4793 | #endif |
177c0ea7 | 4794 | |
630686c8 | 4795 | mark_byte_stack (); |
7146af97 JB |
4796 | for (catch = catchlist; catch; catch = catch->next) |
4797 | { | |
49723c04 SM |
4798 | mark_object (catch->tag); |
4799 | mark_object (catch->val); | |
177c0ea7 | 4800 | } |
7146af97 JB |
4801 | for (handler = handlerlist; handler; handler = handler->next) |
4802 | { | |
49723c04 SM |
4803 | mark_object (handler->handler); |
4804 | mark_object (handler->var); | |
177c0ea7 | 4805 | } |
b40ea20a | 4806 | mark_backtrace (); |
7146af97 | 4807 | |
454d7973 KS |
4808 | #ifdef HAVE_WINDOW_SYSTEM |
4809 | mark_fringe_data (); | |
4810 | #endif | |
4811 | ||
74c35a48 SM |
4812 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
4813 | mark_stack (); | |
4814 | #endif | |
4815 | ||
c37adf23 SM |
4816 | /* Everything is now marked, except for the things that require special |
4817 | finalization, i.e. the undo_list. | |
4818 | Look thru every buffer's undo list | |
4819 | for elements that update markers that were not marked, | |
4820 | and delete them. */ | |
4c315bda RS |
4821 | { |
4822 | register struct buffer *nextb = all_buffers; | |
4823 | ||
4824 | while (nextb) | |
4825 | { | |
4826 | /* If a buffer's undo list is Qt, that means that undo is | |
c37adf23 SM |
4827 | turned off in that buffer. Calling truncate_undo_list on |
4828 | Qt tends to return NULL, which effectively turns undo back on. | |
4829 | So don't call truncate_undo_list if undo_list is Qt. */ | |
4c315bda RS |
4830 | if (! EQ (nextb->undo_list, Qt)) |
4831 | { | |
c37adf23 | 4832 | Lisp_Object tail, prev; |
4c315bda RS |
4833 | tail = nextb->undo_list; |
4834 | prev = Qnil; | |
4835 | while (CONSP (tail)) | |
4836 | { | |
c37adf23 SM |
4837 | if (GC_CONSP (XCAR (tail)) |
4838 | && GC_MARKERP (XCAR (XCAR (tail))) | |
4839 | && !XMARKER (XCAR (XCAR (tail)))->gcmarkbit) | |
4c315bda RS |
4840 | { |
4841 | if (NILP (prev)) | |
c37adf23 | 4842 | nextb->undo_list = tail = XCDR (tail); |
4c315bda | 4843 | else |
f3fbd155 | 4844 | { |
c37adf23 | 4845 | tail = XCDR (tail); |
f3fbd155 KR |
4846 | XSETCDR (prev, tail); |
4847 | } | |
4c315bda RS |
4848 | } |
4849 | else | |
4850 | { | |
4851 | prev = tail; | |
70949dac | 4852 | tail = XCDR (tail); |
4c315bda RS |
4853 | } |
4854 | } | |
4855 | } | |
c37adf23 SM |
4856 | /* Now that we have stripped the elements that need not be in the |
4857 | undo_list any more, we can finally mark the list. */ | |
4858 | mark_object (nextb->undo_list); | |
4c315bda RS |
4859 | |
4860 | nextb = nextb->next; | |
4861 | } | |
4862 | } | |
4863 | ||
c37adf23 | 4864 | gc_sweep (); |
6b67a518 | 4865 | |
7146af97 JB |
4866 | /* Clear the mark bits that we set in certain root slots. */ |
4867 | ||
033a5fa3 | 4868 | unmark_byte_stack (); |
3ef06d12 SM |
4869 | VECTOR_UNMARK (&buffer_defaults); |
4870 | VECTOR_UNMARK (&buffer_local_symbols); | |
7146af97 | 4871 | |
34400008 GM |
4872 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES && 0 |
4873 | dump_zombies (); | |
4874 | #endif | |
4875 | ||
6e0fca1d RS |
4876 | UNBLOCK_INPUT; |
4877 | ||
c23baf9f | 4878 | /* clear_marks (); */ |
7146af97 JB |
4879 | gc_in_progress = 0; |
4880 | ||
4881 | consing_since_gc = 0; | |
4882 | if (gc_cons_threshold < 10000) | |
4883 | gc_cons_threshold = 10000; | |
4884 | ||
299585ee RS |
4885 | if (garbage_collection_messages) |
4886 | { | |
6efc7df7 GM |
4887 | if (message_p || minibuf_level > 0) |
4888 | restore_message (); | |
299585ee RS |
4889 | else |
4890 | message1_nolog ("Garbage collecting...done"); | |
4891 | } | |
7146af97 | 4892 | |
98edb5ff | 4893 | unbind_to (count, Qnil); |
2e471eb5 GM |
4894 | |
4895 | total[0] = Fcons (make_number (total_conses), | |
4896 | make_number (total_free_conses)); | |
4897 | total[1] = Fcons (make_number (total_symbols), | |
4898 | make_number (total_free_symbols)); | |
4899 | total[2] = Fcons (make_number (total_markers), | |
4900 | make_number (total_free_markers)); | |
96117bc7 GM |
4901 | total[3] = make_number (total_string_size); |
4902 | total[4] = make_number (total_vector_size); | |
4903 | total[5] = Fcons (make_number (total_floats), | |
2e471eb5 | 4904 | make_number (total_free_floats)); |
96117bc7 | 4905 | total[6] = Fcons (make_number (total_intervals), |
2e471eb5 | 4906 | make_number (total_free_intervals)); |
96117bc7 | 4907 | total[7] = Fcons (make_number (total_strings), |
2e471eb5 GM |
4908 | make_number (total_free_strings)); |
4909 | ||
34400008 | 4910 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
7146af97 | 4911 | { |
34400008 GM |
4912 | /* Compute average percentage of zombies. */ |
4913 | double nlive = 0; | |
177c0ea7 | 4914 | |
34400008 | 4915 | for (i = 0; i < 7; ++i) |
83fc9c63 DL |
4916 | if (CONSP (total[i])) |
4917 | nlive += XFASTINT (XCAR (total[i])); | |
34400008 GM |
4918 | |
4919 | avg_live = (avg_live * ngcs + nlive) / (ngcs + 1); | |
4920 | max_live = max (nlive, max_live); | |
4921 | avg_zombies = (avg_zombies * ngcs + nzombies) / (ngcs + 1); | |
4922 | max_zombies = max (nzombies, max_zombies); | |
4923 | ++ngcs; | |
4924 | } | |
4925 | #endif | |
7146af97 | 4926 | |
9e713715 GM |
4927 | if (!NILP (Vpost_gc_hook)) |
4928 | { | |
4929 | int count = inhibit_garbage_collection (); | |
4930 | safe_run_hooks (Qpost_gc_hook); | |
4931 | unbind_to (count, Qnil); | |
4932 | } | |
2c5bd608 DL |
4933 | |
4934 | /* Accumulate statistics. */ | |
4935 | EMACS_GET_TIME (t2); | |
4936 | EMACS_SUB_TIME (t3, t2, t1); | |
4937 | if (FLOATP (Vgc_elapsed)) | |
69ab9f85 SM |
4938 | Vgc_elapsed = make_float (XFLOAT_DATA (Vgc_elapsed) + |
4939 | EMACS_SECS (t3) + | |
4940 | EMACS_USECS (t3) * 1.0e-6); | |
2c5bd608 DL |
4941 | gcs_done++; |
4942 | ||
96117bc7 | 4943 | return Flist (sizeof total / sizeof *total, total); |
7146af97 | 4944 | } |
34400008 | 4945 | |
41c28a37 | 4946 | |
3770920e GM |
4947 | /* Mark Lisp objects in glyph matrix MATRIX. Currently the |
4948 | only interesting objects referenced from glyphs are strings. */ | |
41c28a37 GM |
4949 | |
4950 | static void | |
4951 | mark_glyph_matrix (matrix) | |
4952 | struct glyph_matrix *matrix; | |
4953 | { | |
4954 | struct glyph_row *row = matrix->rows; | |
4955 | struct glyph_row *end = row + matrix->nrows; | |
4956 | ||
2e471eb5 GM |
4957 | for (; row < end; ++row) |
4958 | if (row->enabled_p) | |
4959 | { | |
4960 | int area; | |
4961 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
4962 | { | |
4963 | struct glyph *glyph = row->glyphs[area]; | |
4964 | struct glyph *end_glyph = glyph + row->used[area]; | |
177c0ea7 | 4965 | |
2e471eb5 GM |
4966 | for (; glyph < end_glyph; ++glyph) |
4967 | if (GC_STRINGP (glyph->object) | |
4968 | && !STRING_MARKED_P (XSTRING (glyph->object))) | |
49723c04 | 4969 | mark_object (glyph->object); |
2e471eb5 GM |
4970 | } |
4971 | } | |
41c28a37 GM |
4972 | } |
4973 | ||
34400008 | 4974 | |
41c28a37 GM |
4975 | /* Mark Lisp faces in the face cache C. */ |
4976 | ||
4977 | static void | |
4978 | mark_face_cache (c) | |
4979 | struct face_cache *c; | |
4980 | { | |
4981 | if (c) | |
4982 | { | |
4983 | int i, j; | |
4984 | for (i = 0; i < c->used; ++i) | |
4985 | { | |
4986 | struct face *face = FACE_FROM_ID (c->f, i); | |
4987 | ||
4988 | if (face) | |
4989 | { | |
4990 | for (j = 0; j < LFACE_VECTOR_SIZE; ++j) | |
49723c04 | 4991 | mark_object (face->lface[j]); |
41c28a37 GM |
4992 | } |
4993 | } | |
4994 | } | |
4995 | } | |
4996 | ||
4997 | ||
4998 | #ifdef HAVE_WINDOW_SYSTEM | |
4999 | ||
5000 | /* Mark Lisp objects in image IMG. */ | |
5001 | ||
5002 | static void | |
5003 | mark_image (img) | |
5004 | struct image *img; | |
5005 | { | |
49723c04 | 5006 | mark_object (img->spec); |
177c0ea7 | 5007 | |
3e60b029 | 5008 | if (!NILP (img->data.lisp_val)) |
49723c04 | 5009 | mark_object (img->data.lisp_val); |
41c28a37 GM |
5010 | } |
5011 | ||
5012 | ||
5013 | /* Mark Lisp objects in image cache of frame F. It's done this way so | |
5014 | that we don't have to include xterm.h here. */ | |
5015 | ||
5016 | static void | |
5017 | mark_image_cache (f) | |
5018 | struct frame *f; | |
5019 | { | |
5020 | forall_images_in_image_cache (f, mark_image); | |
5021 | } | |
5022 | ||
5023 | #endif /* HAVE_X_WINDOWS */ | |
5024 | ||
5025 | ||
7146af97 | 5026 | \f |
1a4f1e2c | 5027 | /* Mark reference to a Lisp_Object. |
2e471eb5 GM |
5028 | If the object referred to has not been seen yet, recursively mark |
5029 | all the references contained in it. */ | |
7146af97 | 5030 | |
785cd37f | 5031 | #define LAST_MARKED_SIZE 500 |
49723c04 | 5032 | Lisp_Object last_marked[LAST_MARKED_SIZE]; |
785cd37f RS |
5033 | int last_marked_index; |
5034 | ||
1342fc6f RS |
5035 | /* For debugging--call abort when we cdr down this many |
5036 | links of a list, in mark_object. In debugging, | |
5037 | the call to abort will hit a breakpoint. | |
5038 | Normally this is zero and the check never goes off. */ | |
5039 | int mark_object_loop_halt; | |
5040 | ||
41c28a37 | 5041 | void |
49723c04 SM |
5042 | mark_object (arg) |
5043 | Lisp_Object arg; | |
7146af97 | 5044 | { |
49723c04 | 5045 | register Lisp_Object obj = arg; |
4f5c1376 GM |
5046 | #ifdef GC_CHECK_MARKED_OBJECTS |
5047 | void *po; | |
5048 | struct mem_node *m; | |
5049 | #endif | |
1342fc6f | 5050 | int cdr_count = 0; |
7146af97 | 5051 | |
9149e743 | 5052 | loop: |
7146af97 | 5053 | |
1f0b3fd2 | 5054 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
5055 | return; |
5056 | ||
49723c04 | 5057 | last_marked[last_marked_index++] = obj; |
785cd37f RS |
5058 | if (last_marked_index == LAST_MARKED_SIZE) |
5059 | last_marked_index = 0; | |
5060 | ||
4f5c1376 GM |
5061 | /* Perform some sanity checks on the objects marked here. Abort if |
5062 | we encounter an object we know is bogus. This increases GC time | |
5063 | by ~80%, and requires compilation with GC_MARK_STACK != 0. */ | |
5064 | #ifdef GC_CHECK_MARKED_OBJECTS | |
5065 | ||
5066 | po = (void *) XPNTR (obj); | |
5067 | ||
5068 | /* Check that the object pointed to by PO is known to be a Lisp | |
5069 | structure allocated from the heap. */ | |
5070 | #define CHECK_ALLOCATED() \ | |
5071 | do { \ | |
5072 | m = mem_find (po); \ | |
5073 | if (m == MEM_NIL) \ | |
5074 | abort (); \ | |
5075 | } while (0) | |
5076 | ||
5077 | /* Check that the object pointed to by PO is live, using predicate | |
5078 | function LIVEP. */ | |
5079 | #define CHECK_LIVE(LIVEP) \ | |
5080 | do { \ | |
5081 | if (!LIVEP (m, po)) \ | |
5082 | abort (); \ | |
5083 | } while (0) | |
5084 | ||
5085 | /* Check both of the above conditions. */ | |
5086 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) \ | |
5087 | do { \ | |
5088 | CHECK_ALLOCATED (); \ | |
5089 | CHECK_LIVE (LIVEP); \ | |
5090 | } while (0) \ | |
177c0ea7 | 5091 | |
4f5c1376 | 5092 | #else /* not GC_CHECK_MARKED_OBJECTS */ |
177c0ea7 | 5093 | |
4f5c1376 GM |
5094 | #define CHECK_ALLOCATED() (void) 0 |
5095 | #define CHECK_LIVE(LIVEP) (void) 0 | |
5096 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) (void) 0 | |
177c0ea7 | 5097 | |
4f5c1376 GM |
5098 | #endif /* not GC_CHECK_MARKED_OBJECTS */ |
5099 | ||
0220c518 | 5100 | switch (SWITCH_ENUM_CAST (XGCTYPE (obj))) |
7146af97 JB |
5101 | { |
5102 | case Lisp_String: | |
5103 | { | |
5104 | register struct Lisp_String *ptr = XSTRING (obj); | |
4f5c1376 | 5105 | CHECK_ALLOCATED_AND_LIVE (live_string_p); |
d5e35230 | 5106 | MARK_INTERVAL_TREE (ptr->intervals); |
2e471eb5 | 5107 | MARK_STRING (ptr); |
361b097f | 5108 | #ifdef GC_CHECK_STRING_BYTES |
676a7251 GM |
5109 | /* Check that the string size recorded in the string is the |
5110 | same as the one recorded in the sdata structure. */ | |
5111 | CHECK_STRING_BYTES (ptr); | |
361b097f | 5112 | #endif /* GC_CHECK_STRING_BYTES */ |
7146af97 JB |
5113 | } |
5114 | break; | |
5115 | ||
76437631 | 5116 | case Lisp_Vectorlike: |
4f5c1376 GM |
5117 | #ifdef GC_CHECK_MARKED_OBJECTS |
5118 | m = mem_find (po); | |
5119 | if (m == MEM_NIL && !GC_SUBRP (obj) | |
5120 | && po != &buffer_defaults | |
5121 | && po != &buffer_local_symbols) | |
5122 | abort (); | |
5123 | #endif /* GC_CHECK_MARKED_OBJECTS */ | |
177c0ea7 | 5124 | |
30e3190a | 5125 | if (GC_BUFFERP (obj)) |
6b552283 | 5126 | { |
3ef06d12 | 5127 | if (!VECTOR_MARKED_P (XBUFFER (obj))) |
4f5c1376 GM |
5128 | { |
5129 | #ifdef GC_CHECK_MARKED_OBJECTS | |
5130 | if (po != &buffer_defaults && po != &buffer_local_symbols) | |
5131 | { | |
5132 | struct buffer *b; | |
5133 | for (b = all_buffers; b && b != po; b = b->next) | |
5134 | ; | |
5135 | if (b == NULL) | |
5136 | abort (); | |
5137 | } | |
5138 | #endif /* GC_CHECK_MARKED_OBJECTS */ | |
5139 | mark_buffer (obj); | |
5140 | } | |
6b552283 | 5141 | } |
30e3190a | 5142 | else if (GC_SUBRP (obj)) |
169ee243 RS |
5143 | break; |
5144 | else if (GC_COMPILEDP (obj)) | |
2e471eb5 GM |
5145 | /* We could treat this just like a vector, but it is better to |
5146 | save the COMPILED_CONSTANTS element for last and avoid | |
5147 | recursion there. */ | |
169ee243 RS |
5148 | { |
5149 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
5150 | register EMACS_INT size = ptr->size; | |
169ee243 RS |
5151 | register int i; |
5152 | ||
3ef06d12 | 5153 | if (VECTOR_MARKED_P (ptr)) |
169ee243 | 5154 | break; /* Already marked */ |
177c0ea7 | 5155 | |
4f5c1376 | 5156 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 5157 | VECTOR_MARK (ptr); /* Else mark it */ |
76437631 | 5158 | size &= PSEUDOVECTOR_SIZE_MASK; |
169ee243 RS |
5159 | for (i = 0; i < size; i++) /* and then mark its elements */ |
5160 | { | |
5161 | if (i != COMPILED_CONSTANTS) | |
49723c04 | 5162 | mark_object (ptr->contents[i]); |
169ee243 | 5163 | } |
49723c04 | 5164 | obj = ptr->contents[COMPILED_CONSTANTS]; |
169ee243 RS |
5165 | goto loop; |
5166 | } | |
169ee243 RS |
5167 | else if (GC_FRAMEP (obj)) |
5168 | { | |
c70bbf06 | 5169 | register struct frame *ptr = XFRAME (obj); |
169ee243 | 5170 | |
3ef06d12 SM |
5171 | if (VECTOR_MARKED_P (ptr)) break; /* Already marked */ |
5172 | VECTOR_MARK (ptr); /* Else mark it */ | |
169ee243 | 5173 | |
4f5c1376 | 5174 | CHECK_LIVE (live_vector_p); |
49723c04 SM |
5175 | mark_object (ptr->name); |
5176 | mark_object (ptr->icon_name); | |
5177 | mark_object (ptr->title); | |
5178 | mark_object (ptr->focus_frame); | |
5179 | mark_object (ptr->selected_window); | |
5180 | mark_object (ptr->minibuffer_window); | |
5181 | mark_object (ptr->param_alist); | |
5182 | mark_object (ptr->scroll_bars); | |
5183 | mark_object (ptr->condemned_scroll_bars); | |
5184 | mark_object (ptr->menu_bar_items); | |
5185 | mark_object (ptr->face_alist); | |
5186 | mark_object (ptr->menu_bar_vector); | |
5187 | mark_object (ptr->buffer_predicate); | |
5188 | mark_object (ptr->buffer_list); | |
5189 | mark_object (ptr->menu_bar_window); | |
5190 | mark_object (ptr->tool_bar_window); | |
41c28a37 GM |
5191 | mark_face_cache (ptr->face_cache); |
5192 | #ifdef HAVE_WINDOW_SYSTEM | |
5193 | mark_image_cache (ptr); | |
49723c04 SM |
5194 | mark_object (ptr->tool_bar_items); |
5195 | mark_object (ptr->desired_tool_bar_string); | |
5196 | mark_object (ptr->current_tool_bar_string); | |
41c28a37 | 5197 | #endif /* HAVE_WINDOW_SYSTEM */ |
169ee243 | 5198 | } |
7b07587b | 5199 | else if (GC_BOOL_VECTOR_P (obj)) |
707788bd RS |
5200 | { |
5201 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
5202 | ||
3ef06d12 | 5203 | if (VECTOR_MARKED_P (ptr)) |
707788bd | 5204 | break; /* Already marked */ |
4f5c1376 | 5205 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 5206 | VECTOR_MARK (ptr); /* Else mark it */ |
707788bd | 5207 | } |
41c28a37 GM |
5208 | else if (GC_WINDOWP (obj)) |
5209 | { | |
5210 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
5211 | struct window *w = XWINDOW (obj); | |
41c28a37 GM |
5212 | register int i; |
5213 | ||
5214 | /* Stop if already marked. */ | |
3ef06d12 | 5215 | if (VECTOR_MARKED_P (ptr)) |
41c28a37 GM |
5216 | break; |
5217 | ||
5218 | /* Mark it. */ | |
4f5c1376 | 5219 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 5220 | VECTOR_MARK (ptr); |
41c28a37 GM |
5221 | |
5222 | /* There is no Lisp data above The member CURRENT_MATRIX in | |
5223 | struct WINDOW. Stop marking when that slot is reached. */ | |
5224 | for (i = 0; | |
c70bbf06 | 5225 | (char *) &ptr->contents[i] < (char *) &w->current_matrix; |
41c28a37 | 5226 | i++) |
49723c04 | 5227 | mark_object (ptr->contents[i]); |
41c28a37 GM |
5228 | |
5229 | /* Mark glyphs for leaf windows. Marking window matrices is | |
5230 | sufficient because frame matrices use the same glyph | |
5231 | memory. */ | |
5232 | if (NILP (w->hchild) | |
5233 | && NILP (w->vchild) | |
5234 | && w->current_matrix) | |
5235 | { | |
5236 | mark_glyph_matrix (w->current_matrix); | |
5237 | mark_glyph_matrix (w->desired_matrix); | |
5238 | } | |
5239 | } | |
5240 | else if (GC_HASH_TABLE_P (obj)) | |
5241 | { | |
5242 | struct Lisp_Hash_Table *h = XHASH_TABLE (obj); | |
177c0ea7 | 5243 | |
41c28a37 | 5244 | /* Stop if already marked. */ |
3ef06d12 | 5245 | if (VECTOR_MARKED_P (h)) |
41c28a37 | 5246 | break; |
177c0ea7 | 5247 | |
41c28a37 | 5248 | /* Mark it. */ |
4f5c1376 | 5249 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 5250 | VECTOR_MARK (h); |
41c28a37 GM |
5251 | |
5252 | /* Mark contents. */ | |
94a877ef | 5253 | /* Do not mark next_free or next_weak. |
177c0ea7 | 5254 | Being in the next_weak chain |
94a877ef RS |
5255 | should not keep the hash table alive. |
5256 | No need to mark `count' since it is an integer. */ | |
49723c04 SM |
5257 | mark_object (h->test); |
5258 | mark_object (h->weak); | |
5259 | mark_object (h->rehash_size); | |
5260 | mark_object (h->rehash_threshold); | |
5261 | mark_object (h->hash); | |
5262 | mark_object (h->next); | |
5263 | mark_object (h->index); | |
5264 | mark_object (h->user_hash_function); | |
5265 | mark_object (h->user_cmp_function); | |
41c28a37 GM |
5266 | |
5267 | /* If hash table is not weak, mark all keys and values. | |
5268 | For weak tables, mark only the vector. */ | |
5269 | if (GC_NILP (h->weak)) | |
49723c04 | 5270 | mark_object (h->key_and_value); |
41c28a37 | 5271 | else |
3ef06d12 | 5272 | VECTOR_MARK (XVECTOR (h->key_and_value)); |
41c28a37 | 5273 | } |
04ff9756 | 5274 | else |
169ee243 RS |
5275 | { |
5276 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
5277 | register EMACS_INT size = ptr->size; | |
169ee243 RS |
5278 | register int i; |
5279 | ||
3ef06d12 | 5280 | if (VECTOR_MARKED_P (ptr)) break; /* Already marked */ |
4f5c1376 | 5281 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 5282 | VECTOR_MARK (ptr); /* Else mark it */ |
169ee243 RS |
5283 | if (size & PSEUDOVECTOR_FLAG) |
5284 | size &= PSEUDOVECTOR_SIZE_MASK; | |
41c28a37 | 5285 | |
169ee243 | 5286 | for (i = 0; i < size; i++) /* and then mark its elements */ |
49723c04 | 5287 | mark_object (ptr->contents[i]); |
169ee243 RS |
5288 | } |
5289 | break; | |
7146af97 | 5290 | |
7146af97 JB |
5291 | case Lisp_Symbol: |
5292 | { | |
c70bbf06 | 5293 | register struct Lisp_Symbol *ptr = XSYMBOL (obj); |
7146af97 JB |
5294 | struct Lisp_Symbol *ptrx; |
5295 | ||
2336fe58 | 5296 | if (ptr->gcmarkbit) break; |
4f5c1376 | 5297 | CHECK_ALLOCATED_AND_LIVE (live_symbol_p); |
2336fe58 | 5298 | ptr->gcmarkbit = 1; |
49723c04 SM |
5299 | mark_object (ptr->value); |
5300 | mark_object (ptr->function); | |
5301 | mark_object (ptr->plist); | |
34400008 | 5302 | |
8fe5665d KR |
5303 | if (!PURE_POINTER_P (XSTRING (ptr->xname))) |
5304 | MARK_STRING (XSTRING (ptr->xname)); | |
d5db4077 | 5305 | MARK_INTERVAL_TREE (STRING_INTERVALS (ptr->xname)); |
177c0ea7 | 5306 | |
1c6bb482 RS |
5307 | /* Note that we do not mark the obarray of the symbol. |
5308 | It is safe not to do so because nothing accesses that | |
5309 | slot except to check whether it is nil. */ | |
7146af97 JB |
5310 | ptr = ptr->next; |
5311 | if (ptr) | |
5312 | { | |
b0846f52 | 5313 | ptrx = ptr; /* Use of ptrx avoids compiler bug on Sun */ |
7146af97 | 5314 | XSETSYMBOL (obj, ptrx); |
49723c04 | 5315 | goto loop; |
7146af97 JB |
5316 | } |
5317 | } | |
5318 | break; | |
5319 | ||
a0a38eb7 | 5320 | case Lisp_Misc: |
4f5c1376 | 5321 | CHECK_ALLOCATED_AND_LIVE (live_misc_p); |
2336fe58 SM |
5322 | if (XMARKER (obj)->gcmarkbit) |
5323 | break; | |
5324 | XMARKER (obj)->gcmarkbit = 1; | |
b766f870 | 5325 | |
a5da44fe | 5326 | switch (XMISCTYPE (obj)) |
a0a38eb7 | 5327 | { |
465edf35 KH |
5328 | case Lisp_Misc_Buffer_Local_Value: |
5329 | case Lisp_Misc_Some_Buffer_Local_Value: | |
5330 | { | |
5331 | register struct Lisp_Buffer_Local_Value *ptr | |
5332 | = XBUFFER_LOCAL_VALUE (obj); | |
465edf35 KH |
5333 | /* If the cdr is nil, avoid recursion for the car. */ |
5334 | if (EQ (ptr->cdr, Qnil)) | |
5335 | { | |
49723c04 | 5336 | obj = ptr->realvalue; |
465edf35 KH |
5337 | goto loop; |
5338 | } | |
49723c04 SM |
5339 | mark_object (ptr->realvalue); |
5340 | mark_object (ptr->buffer); | |
5341 | mark_object (ptr->frame); | |
5342 | obj = ptr->cdr; | |
465edf35 KH |
5343 | goto loop; |
5344 | } | |
5345 | ||
2336fe58 SM |
5346 | case Lisp_Misc_Marker: |
5347 | /* DO NOT mark thru the marker's chain. | |
5348 | The buffer's markers chain does not preserve markers from gc; | |
5349 | instead, markers are removed from the chain when freed by gc. */ | |
b766f870 KS |
5350 | break; |
5351 | ||
c8616056 KH |
5352 | case Lisp_Misc_Intfwd: |
5353 | case Lisp_Misc_Boolfwd: | |
5354 | case Lisp_Misc_Objfwd: | |
5355 | case Lisp_Misc_Buffer_Objfwd: | |
b875d3f7 | 5356 | case Lisp_Misc_Kboard_Objfwd: |
c8616056 KH |
5357 | /* Don't bother with Lisp_Buffer_Objfwd, |
5358 | since all markable slots in current buffer marked anyway. */ | |
5359 | /* Don't need to do Lisp_Objfwd, since the places they point | |
5360 | are protected with staticpro. */ | |
b766f870 KS |
5361 | break; |
5362 | ||
f29181dc | 5363 | case Lisp_Misc_Save_Value: |
9ea306d1 | 5364 | #if GC_MARK_STACK |
b766f870 KS |
5365 | { |
5366 | register struct Lisp_Save_Value *ptr = XSAVE_VALUE (obj); | |
5367 | /* If DOGC is set, POINTER is the address of a memory | |
5368 | area containing INTEGER potential Lisp_Objects. */ | |
5369 | if (ptr->dogc) | |
5370 | { | |
5371 | Lisp_Object *p = (Lisp_Object *) ptr->pointer; | |
5372 | int nelt; | |
5373 | for (nelt = ptr->integer; nelt > 0; nelt--, p++) | |
5374 | mark_maybe_object (*p); | |
5375 | } | |
5376 | } | |
9ea306d1 | 5377 | #endif |
c8616056 KH |
5378 | break; |
5379 | ||
e202fa34 KH |
5380 | case Lisp_Misc_Overlay: |
5381 | { | |
5382 | struct Lisp_Overlay *ptr = XOVERLAY (obj); | |
49723c04 SM |
5383 | mark_object (ptr->start); |
5384 | mark_object (ptr->end); | |
f54253ec SM |
5385 | mark_object (ptr->plist); |
5386 | if (ptr->next) | |
5387 | { | |
5388 | XSETMISC (obj, ptr->next); | |
5389 | goto loop; | |
5390 | } | |
e202fa34 KH |
5391 | } |
5392 | break; | |
5393 | ||
a0a38eb7 KH |
5394 | default: |
5395 | abort (); | |
5396 | } | |
7146af97 JB |
5397 | break; |
5398 | ||
5399 | case Lisp_Cons: | |
7146af97 JB |
5400 | { |
5401 | register struct Lisp_Cons *ptr = XCONS (obj); | |
08b7c2cb | 5402 | if (CONS_MARKED_P (ptr)) break; |
4f5c1376 | 5403 | CHECK_ALLOCATED_AND_LIVE (live_cons_p); |
08b7c2cb | 5404 | CONS_MARK (ptr); |
c54ca951 RS |
5405 | /* If the cdr is nil, avoid recursion for the car. */ |
5406 | if (EQ (ptr->cdr, Qnil)) | |
5407 | { | |
49723c04 | 5408 | obj = ptr->car; |
1342fc6f | 5409 | cdr_count = 0; |
c54ca951 RS |
5410 | goto loop; |
5411 | } | |
49723c04 SM |
5412 | mark_object (ptr->car); |
5413 | obj = ptr->cdr; | |
1342fc6f RS |
5414 | cdr_count++; |
5415 | if (cdr_count == mark_object_loop_halt) | |
5416 | abort (); | |
7146af97 JB |
5417 | goto loop; |
5418 | } | |
5419 | ||
7146af97 | 5420 | case Lisp_Float: |
4f5c1376 | 5421 | CHECK_ALLOCATED_AND_LIVE (live_float_p); |
ab6780cd | 5422 | FLOAT_MARK (XFLOAT (obj)); |
7146af97 | 5423 | break; |
7146af97 | 5424 | |
7146af97 | 5425 | case Lisp_Int: |
7146af97 JB |
5426 | break; |
5427 | ||
5428 | default: | |
5429 | abort (); | |
5430 | } | |
4f5c1376 GM |
5431 | |
5432 | #undef CHECK_LIVE | |
5433 | #undef CHECK_ALLOCATED | |
5434 | #undef CHECK_ALLOCATED_AND_LIVE | |
7146af97 JB |
5435 | } |
5436 | ||
5437 | /* Mark the pointers in a buffer structure. */ | |
5438 | ||
5439 | static void | |
5440 | mark_buffer (buf) | |
5441 | Lisp_Object buf; | |
5442 | { | |
7146af97 | 5443 | register struct buffer *buffer = XBUFFER (buf); |
f54253ec | 5444 | register Lisp_Object *ptr, tmp; |
30e3190a | 5445 | Lisp_Object base_buffer; |
7146af97 | 5446 | |
3ef06d12 | 5447 | VECTOR_MARK (buffer); |
7146af97 | 5448 | |
30e3190a | 5449 | MARK_INTERVAL_TREE (BUF_INTERVALS (buffer)); |
d5e35230 | 5450 | |
c37adf23 SM |
5451 | /* For now, we just don't mark the undo_list. It's done later in |
5452 | a special way just before the sweep phase, and after stripping | |
5453 | some of its elements that are not needed any more. */ | |
4c315bda | 5454 | |
f54253ec SM |
5455 | if (buffer->overlays_before) |
5456 | { | |
5457 | XSETMISC (tmp, buffer->overlays_before); | |
5458 | mark_object (tmp); | |
5459 | } | |
5460 | if (buffer->overlays_after) | |
5461 | { | |
5462 | XSETMISC (tmp, buffer->overlays_after); | |
5463 | mark_object (tmp); | |
5464 | } | |
5465 | ||
3ef06d12 | 5466 | for (ptr = &buffer->name; |
7146af97 JB |
5467 | (char *)ptr < (char *)buffer + sizeof (struct buffer); |
5468 | ptr++) | |
49723c04 | 5469 | mark_object (*ptr); |
30e3190a RS |
5470 | |
5471 | /* If this is an indirect buffer, mark its base buffer. */ | |
349bd9ed | 5472 | if (buffer->base_buffer && !VECTOR_MARKED_P (buffer->base_buffer)) |
30e3190a | 5473 | { |
177c0ea7 | 5474 | XSETBUFFER (base_buffer, buffer->base_buffer); |
30e3190a RS |
5475 | mark_buffer (base_buffer); |
5476 | } | |
7146af97 | 5477 | } |
084b1a0c KH |
5478 | |
5479 | ||
41c28a37 GM |
5480 | /* Value is non-zero if OBJ will survive the current GC because it's |
5481 | either marked or does not need to be marked to survive. */ | |
5482 | ||
5483 | int | |
5484 | survives_gc_p (obj) | |
5485 | Lisp_Object obj; | |
5486 | { | |
5487 | int survives_p; | |
177c0ea7 | 5488 | |
41c28a37 GM |
5489 | switch (XGCTYPE (obj)) |
5490 | { | |
5491 | case Lisp_Int: | |
5492 | survives_p = 1; | |
5493 | break; | |
5494 | ||
5495 | case Lisp_Symbol: | |
2336fe58 | 5496 | survives_p = XSYMBOL (obj)->gcmarkbit; |
41c28a37 GM |
5497 | break; |
5498 | ||
5499 | case Lisp_Misc: | |
ef89c2ce | 5500 | survives_p = XMARKER (obj)->gcmarkbit; |
41c28a37 GM |
5501 | break; |
5502 | ||
5503 | case Lisp_String: | |
08b7c2cb | 5504 | survives_p = STRING_MARKED_P (XSTRING (obj)); |
41c28a37 GM |
5505 | break; |
5506 | ||
5507 | case Lisp_Vectorlike: | |
08b7c2cb | 5508 | survives_p = GC_SUBRP (obj) || VECTOR_MARKED_P (XVECTOR (obj)); |
41c28a37 GM |
5509 | break; |
5510 | ||
5511 | case Lisp_Cons: | |
08b7c2cb | 5512 | survives_p = CONS_MARKED_P (XCONS (obj)); |
41c28a37 GM |
5513 | break; |
5514 | ||
41c28a37 | 5515 | case Lisp_Float: |
ab6780cd | 5516 | survives_p = FLOAT_MARKED_P (XFLOAT (obj)); |
41c28a37 | 5517 | break; |
41c28a37 GM |
5518 | |
5519 | default: | |
5520 | abort (); | |
5521 | } | |
5522 | ||
34400008 | 5523 | return survives_p || PURE_POINTER_P ((void *) XPNTR (obj)); |
41c28a37 GM |
5524 | } |
5525 | ||
5526 | ||
7146af97 | 5527 | \f |
1a4f1e2c | 5528 | /* Sweep: find all structures not marked, and free them. */ |
7146af97 JB |
5529 | |
5530 | static void | |
5531 | gc_sweep () | |
5532 | { | |
c37adf23 SM |
5533 | /* Remove or mark entries in weak hash tables. |
5534 | This must be done before any object is unmarked. */ | |
5535 | sweep_weak_hash_tables (); | |
5536 | ||
5537 | sweep_strings (); | |
5538 | #ifdef GC_CHECK_STRING_BYTES | |
5539 | if (!noninteractive) | |
5540 | check_string_bytes (1); | |
5541 | #endif | |
5542 | ||
7146af97 JB |
5543 | /* Put all unmarked conses on free list */ |
5544 | { | |
5545 | register struct cons_block *cblk; | |
6ca94ac9 | 5546 | struct cons_block **cprev = &cons_block; |
7146af97 JB |
5547 | register int lim = cons_block_index; |
5548 | register int num_free = 0, num_used = 0; | |
5549 | ||
5550 | cons_free_list = 0; | |
177c0ea7 | 5551 | |
6ca94ac9 | 5552 | for (cblk = cons_block; cblk; cblk = *cprev) |
7146af97 JB |
5553 | { |
5554 | register int i; | |
6ca94ac9 | 5555 | int this_free = 0; |
7146af97 | 5556 | for (i = 0; i < lim; i++) |
08b7c2cb | 5557 | if (!CONS_MARKED_P (&cblk->conses[i])) |
7146af97 | 5558 | { |
6ca94ac9 | 5559 | this_free++; |
1cd5fe6a | 5560 | *(struct Lisp_Cons **)&cblk->conses[i].cdr = cons_free_list; |
7146af97 | 5561 | cons_free_list = &cblk->conses[i]; |
34400008 GM |
5562 | #if GC_MARK_STACK |
5563 | cons_free_list->car = Vdead; | |
5564 | #endif | |
7146af97 JB |
5565 | } |
5566 | else | |
5567 | { | |
5568 | num_used++; | |
08b7c2cb | 5569 | CONS_UNMARK (&cblk->conses[i]); |
7146af97 JB |
5570 | } |
5571 | lim = CONS_BLOCK_SIZE; | |
6ca94ac9 KH |
5572 | /* If this block contains only free conses and we have already |
5573 | seen more than two blocks worth of free conses then deallocate | |
5574 | this block. */ | |
6feef451 | 5575 | if (this_free == CONS_BLOCK_SIZE && num_free > CONS_BLOCK_SIZE) |
6ca94ac9 | 5576 | { |
6ca94ac9 KH |
5577 | *cprev = cblk->next; |
5578 | /* Unhook from the free list. */ | |
5579 | cons_free_list = *(struct Lisp_Cons **) &cblk->conses[0].cdr; | |
08b7c2cb | 5580 | lisp_align_free (cblk); |
c8099634 | 5581 | n_cons_blocks--; |
6ca94ac9 KH |
5582 | } |
5583 | else | |
6feef451 AS |
5584 | { |
5585 | num_free += this_free; | |
5586 | cprev = &cblk->next; | |
5587 | } | |
7146af97 JB |
5588 | } |
5589 | total_conses = num_used; | |
5590 | total_free_conses = num_free; | |
5591 | } | |
5592 | ||
7146af97 JB |
5593 | /* Put all unmarked floats on free list */ |
5594 | { | |
5595 | register struct float_block *fblk; | |
6ca94ac9 | 5596 | struct float_block **fprev = &float_block; |
7146af97 JB |
5597 | register int lim = float_block_index; |
5598 | register int num_free = 0, num_used = 0; | |
5599 | ||
5600 | float_free_list = 0; | |
177c0ea7 | 5601 | |
6ca94ac9 | 5602 | for (fblk = float_block; fblk; fblk = *fprev) |
7146af97 JB |
5603 | { |
5604 | register int i; | |
6ca94ac9 | 5605 | int this_free = 0; |
7146af97 | 5606 | for (i = 0; i < lim; i++) |
ab6780cd | 5607 | if (!FLOAT_MARKED_P (&fblk->floats[i])) |
7146af97 | 5608 | { |
6ca94ac9 | 5609 | this_free++; |
1cd5fe6a | 5610 | *(struct Lisp_Float **)&fblk->floats[i].data = float_free_list; |
7146af97 JB |
5611 | float_free_list = &fblk->floats[i]; |
5612 | } | |
5613 | else | |
5614 | { | |
5615 | num_used++; | |
ab6780cd | 5616 | FLOAT_UNMARK (&fblk->floats[i]); |
7146af97 JB |
5617 | } |
5618 | lim = FLOAT_BLOCK_SIZE; | |
6ca94ac9 KH |
5619 | /* If this block contains only free floats and we have already |
5620 | seen more than two blocks worth of free floats then deallocate | |
5621 | this block. */ | |
6feef451 | 5622 | if (this_free == FLOAT_BLOCK_SIZE && num_free > FLOAT_BLOCK_SIZE) |
6ca94ac9 | 5623 | { |
6ca94ac9 KH |
5624 | *fprev = fblk->next; |
5625 | /* Unhook from the free list. */ | |
5626 | float_free_list = *(struct Lisp_Float **) &fblk->floats[0].data; | |
ab6780cd | 5627 | lisp_align_free (fblk); |
c8099634 | 5628 | n_float_blocks--; |
6ca94ac9 KH |
5629 | } |
5630 | else | |
6feef451 AS |
5631 | { |
5632 | num_free += this_free; | |
5633 | fprev = &fblk->next; | |
5634 | } | |
7146af97 JB |
5635 | } |
5636 | total_floats = num_used; | |
5637 | total_free_floats = num_free; | |
5638 | } | |
7146af97 | 5639 | |
d5e35230 JA |
5640 | /* Put all unmarked intervals on free list */ |
5641 | { | |
5642 | register struct interval_block *iblk; | |
6ca94ac9 | 5643 | struct interval_block **iprev = &interval_block; |
d5e35230 JA |
5644 | register int lim = interval_block_index; |
5645 | register int num_free = 0, num_used = 0; | |
5646 | ||
5647 | interval_free_list = 0; | |
5648 | ||
6ca94ac9 | 5649 | for (iblk = interval_block; iblk; iblk = *iprev) |
d5e35230 JA |
5650 | { |
5651 | register int i; | |
6ca94ac9 | 5652 | int this_free = 0; |
d5e35230 JA |
5653 | |
5654 | for (i = 0; i < lim; i++) | |
5655 | { | |
2336fe58 | 5656 | if (!iblk->intervals[i].gcmarkbit) |
d5e35230 | 5657 | { |
439d5cb4 | 5658 | SET_INTERVAL_PARENT (&iblk->intervals[i], interval_free_list); |
d5e35230 | 5659 | interval_free_list = &iblk->intervals[i]; |
6ca94ac9 | 5660 | this_free++; |
d5e35230 JA |
5661 | } |
5662 | else | |
5663 | { | |
5664 | num_used++; | |
2336fe58 | 5665 | iblk->intervals[i].gcmarkbit = 0; |
d5e35230 JA |
5666 | } |
5667 | } | |
5668 | lim = INTERVAL_BLOCK_SIZE; | |
6ca94ac9 KH |
5669 | /* If this block contains only free intervals and we have already |
5670 | seen more than two blocks worth of free intervals then | |
5671 | deallocate this block. */ | |
6feef451 | 5672 | if (this_free == INTERVAL_BLOCK_SIZE && num_free > INTERVAL_BLOCK_SIZE) |
6ca94ac9 | 5673 | { |
6ca94ac9 KH |
5674 | *iprev = iblk->next; |
5675 | /* Unhook from the free list. */ | |
439d5cb4 | 5676 | interval_free_list = INTERVAL_PARENT (&iblk->intervals[0]); |
c8099634 RS |
5677 | lisp_free (iblk); |
5678 | n_interval_blocks--; | |
6ca94ac9 KH |
5679 | } |
5680 | else | |
6feef451 AS |
5681 | { |
5682 | num_free += this_free; | |
5683 | iprev = &iblk->next; | |
5684 | } | |
d5e35230 JA |
5685 | } |
5686 | total_intervals = num_used; | |
5687 | total_free_intervals = num_free; | |
5688 | } | |
d5e35230 | 5689 | |
7146af97 JB |
5690 | /* Put all unmarked symbols on free list */ |
5691 | { | |
5692 | register struct symbol_block *sblk; | |
6ca94ac9 | 5693 | struct symbol_block **sprev = &symbol_block; |
7146af97 JB |
5694 | register int lim = symbol_block_index; |
5695 | register int num_free = 0, num_used = 0; | |
5696 | ||
d285b373 | 5697 | symbol_free_list = NULL; |
177c0ea7 | 5698 | |
6ca94ac9 | 5699 | for (sblk = symbol_block; sblk; sblk = *sprev) |
7146af97 | 5700 | { |
6ca94ac9 | 5701 | int this_free = 0; |
d285b373 GM |
5702 | struct Lisp_Symbol *sym = sblk->symbols; |
5703 | struct Lisp_Symbol *end = sym + lim; | |
5704 | ||
5705 | for (; sym < end; ++sym) | |
5706 | { | |
20035321 SM |
5707 | /* Check if the symbol was created during loadup. In such a case |
5708 | it might be pointed to by pure bytecode which we don't trace, | |
5709 | so we conservatively assume that it is live. */ | |
8fe5665d | 5710 | int pure_p = PURE_POINTER_P (XSTRING (sym->xname)); |
177c0ea7 | 5711 | |
2336fe58 | 5712 | if (!sym->gcmarkbit && !pure_p) |
d285b373 GM |
5713 | { |
5714 | *(struct Lisp_Symbol **) &sym->value = symbol_free_list; | |
5715 | symbol_free_list = sym; | |
34400008 | 5716 | #if GC_MARK_STACK |
d285b373 | 5717 | symbol_free_list->function = Vdead; |
34400008 | 5718 | #endif |
d285b373 GM |
5719 | ++this_free; |
5720 | } | |
5721 | else | |
5722 | { | |
5723 | ++num_used; | |
5724 | if (!pure_p) | |
8fe5665d | 5725 | UNMARK_STRING (XSTRING (sym->xname)); |
2336fe58 | 5726 | sym->gcmarkbit = 0; |
d285b373 GM |
5727 | } |
5728 | } | |
177c0ea7 | 5729 | |
7146af97 | 5730 | lim = SYMBOL_BLOCK_SIZE; |
6ca94ac9 KH |
5731 | /* If this block contains only free symbols and we have already |
5732 | seen more than two blocks worth of free symbols then deallocate | |
5733 | this block. */ | |
6feef451 | 5734 | if (this_free == SYMBOL_BLOCK_SIZE && num_free > SYMBOL_BLOCK_SIZE) |
6ca94ac9 | 5735 | { |
6ca94ac9 KH |
5736 | *sprev = sblk->next; |
5737 | /* Unhook from the free list. */ | |
5738 | symbol_free_list = *(struct Lisp_Symbol **)&sblk->symbols[0].value; | |
c8099634 RS |
5739 | lisp_free (sblk); |
5740 | n_symbol_blocks--; | |
6ca94ac9 KH |
5741 | } |
5742 | else | |
6feef451 AS |
5743 | { |
5744 | num_free += this_free; | |
5745 | sprev = &sblk->next; | |
5746 | } | |
7146af97 JB |
5747 | } |
5748 | total_symbols = num_used; | |
5749 | total_free_symbols = num_free; | |
5750 | } | |
5751 | ||
a9faeabe RS |
5752 | /* Put all unmarked misc's on free list. |
5753 | For a marker, first unchain it from the buffer it points into. */ | |
7146af97 JB |
5754 | { |
5755 | register struct marker_block *mblk; | |
6ca94ac9 | 5756 | struct marker_block **mprev = &marker_block; |
7146af97 JB |
5757 | register int lim = marker_block_index; |
5758 | register int num_free = 0, num_used = 0; | |
5759 | ||
5760 | marker_free_list = 0; | |
177c0ea7 | 5761 | |
6ca94ac9 | 5762 | for (mblk = marker_block; mblk; mblk = *mprev) |
7146af97 JB |
5763 | { |
5764 | register int i; | |
6ca94ac9 | 5765 | int this_free = 0; |
fa05e253 | 5766 | |
7146af97 | 5767 | for (i = 0; i < lim; i++) |
465edf35 | 5768 | { |
2336fe58 | 5769 | if (!mblk->markers[i].u_marker.gcmarkbit) |
465edf35 | 5770 | { |
a5da44fe | 5771 | if (mblk->markers[i].u_marker.type == Lisp_Misc_Marker) |
ef89c2ce | 5772 | unchain_marker (&mblk->markers[i].u_marker); |
fa05e253 RS |
5773 | /* Set the type of the freed object to Lisp_Misc_Free. |
5774 | We could leave the type alone, since nobody checks it, | |
465edf35 | 5775 | but this might catch bugs faster. */ |
a5da44fe | 5776 | mblk->markers[i].u_marker.type = Lisp_Misc_Free; |
465edf35 KH |
5777 | mblk->markers[i].u_free.chain = marker_free_list; |
5778 | marker_free_list = &mblk->markers[i]; | |
6ca94ac9 | 5779 | this_free++; |
465edf35 KH |
5780 | } |
5781 | else | |
5782 | { | |
5783 | num_used++; | |
2336fe58 | 5784 | mblk->markers[i].u_marker.gcmarkbit = 0; |
465edf35 KH |
5785 | } |
5786 | } | |
7146af97 | 5787 | lim = MARKER_BLOCK_SIZE; |
6ca94ac9 KH |
5788 | /* If this block contains only free markers and we have already |
5789 | seen more than two blocks worth of free markers then deallocate | |
5790 | this block. */ | |
6feef451 | 5791 | if (this_free == MARKER_BLOCK_SIZE && num_free > MARKER_BLOCK_SIZE) |
6ca94ac9 | 5792 | { |
6ca94ac9 KH |
5793 | *mprev = mblk->next; |
5794 | /* Unhook from the free list. */ | |
5795 | marker_free_list = mblk->markers[0].u_free.chain; | |
c37adf23 | 5796 | lisp_free (mblk); |
c8099634 | 5797 | n_marker_blocks--; |
6ca94ac9 KH |
5798 | } |
5799 | else | |
6feef451 AS |
5800 | { |
5801 | num_free += this_free; | |
5802 | mprev = &mblk->next; | |
5803 | } | |
7146af97 JB |
5804 | } |
5805 | ||
5806 | total_markers = num_used; | |
5807 | total_free_markers = num_free; | |
5808 | } | |
5809 | ||
5810 | /* Free all unmarked buffers */ | |
5811 | { | |
5812 | register struct buffer *buffer = all_buffers, *prev = 0, *next; | |
5813 | ||
5814 | while (buffer) | |
3ef06d12 | 5815 | if (!VECTOR_MARKED_P (buffer)) |
7146af97 JB |
5816 | { |
5817 | if (prev) | |
5818 | prev->next = buffer->next; | |
5819 | else | |
5820 | all_buffers = buffer->next; | |
5821 | next = buffer->next; | |
34400008 | 5822 | lisp_free (buffer); |
7146af97 JB |
5823 | buffer = next; |
5824 | } | |
5825 | else | |
5826 | { | |
3ef06d12 | 5827 | VECTOR_UNMARK (buffer); |
30e3190a | 5828 | UNMARK_BALANCE_INTERVALS (BUF_INTERVALS (buffer)); |
7146af97 JB |
5829 | prev = buffer, buffer = buffer->next; |
5830 | } | |
5831 | } | |
5832 | ||
7146af97 JB |
5833 | /* Free all unmarked vectors */ |
5834 | { | |
5835 | register struct Lisp_Vector *vector = all_vectors, *prev = 0, *next; | |
5836 | total_vector_size = 0; | |
5837 | ||
5838 | while (vector) | |
3ef06d12 | 5839 | if (!VECTOR_MARKED_P (vector)) |
7146af97 JB |
5840 | { |
5841 | if (prev) | |
5842 | prev->next = vector->next; | |
5843 | else | |
5844 | all_vectors = vector->next; | |
5845 | next = vector->next; | |
c8099634 RS |
5846 | lisp_free (vector); |
5847 | n_vectors--; | |
7146af97 | 5848 | vector = next; |
41c28a37 | 5849 | |
7146af97 JB |
5850 | } |
5851 | else | |
5852 | { | |
3ef06d12 | 5853 | VECTOR_UNMARK (vector); |
fa05e253 RS |
5854 | if (vector->size & PSEUDOVECTOR_FLAG) |
5855 | total_vector_size += (PSEUDOVECTOR_SIZE_MASK & vector->size); | |
5856 | else | |
5857 | total_vector_size += vector->size; | |
7146af97 JB |
5858 | prev = vector, vector = vector->next; |
5859 | } | |
5860 | } | |
177c0ea7 | 5861 | |
676a7251 GM |
5862 | #ifdef GC_CHECK_STRING_BYTES |
5863 | if (!noninteractive) | |
5864 | check_string_bytes (1); | |
5865 | #endif | |
7146af97 | 5866 | } |
7146af97 | 5867 | |
7146af97 | 5868 | |
7146af97 | 5869 | |
7146af97 | 5870 | \f |
20d24714 JB |
5871 | /* Debugging aids. */ |
5872 | ||
31ce1c91 | 5873 | DEFUN ("memory-limit", Fmemory_limit, Smemory_limit, 0, 0, 0, |
a6266d23 | 5874 | doc: /* Return the address of the last byte Emacs has allocated, divided by 1024. |
228299fa | 5875 | This may be helpful in debugging Emacs's memory usage. |
7ee72033 MB |
5876 | We divide the value by 1024 to make sure it fits in a Lisp integer. */) |
5877 | () | |
20d24714 JB |
5878 | { |
5879 | Lisp_Object end; | |
5880 | ||
45d12a89 | 5881 | XSETINT (end, (EMACS_INT) sbrk (0) / 1024); |
20d24714 JB |
5882 | |
5883 | return end; | |
5884 | } | |
5885 | ||
310ea200 | 5886 | DEFUN ("memory-use-counts", Fmemory_use_counts, Smemory_use_counts, 0, 0, 0, |
a6266d23 | 5887 | doc: /* Return a list of counters that measure how much consing there has been. |
228299fa GM |
5888 | Each of these counters increments for a certain kind of object. |
5889 | The counters wrap around from the largest positive integer to zero. | |
5890 | Garbage collection does not decrease them. | |
5891 | The elements of the value are as follows: | |
5892 | (CONSES FLOATS VECTOR-CELLS SYMBOLS STRING-CHARS MISCS INTERVALS STRINGS) | |
5893 | All are in units of 1 = one object consed | |
5894 | except for VECTOR-CELLS and STRING-CHARS, which count the total length of | |
5895 | objects consed. | |
5896 | MISCS include overlays, markers, and some internal types. | |
5897 | Frames, windows, buffers, and subprocesses count as vectors | |
7ee72033 MB |
5898 | (but the contents of a buffer's text do not count here). */) |
5899 | () | |
310ea200 | 5900 | { |
2e471eb5 | 5901 | Lisp_Object consed[8]; |
310ea200 | 5902 | |
78e985eb GM |
5903 | consed[0] = make_number (min (MOST_POSITIVE_FIXNUM, cons_cells_consed)); |
5904 | consed[1] = make_number (min (MOST_POSITIVE_FIXNUM, floats_consed)); | |
5905 | consed[2] = make_number (min (MOST_POSITIVE_FIXNUM, vector_cells_consed)); | |
5906 | consed[3] = make_number (min (MOST_POSITIVE_FIXNUM, symbols_consed)); | |
5907 | consed[4] = make_number (min (MOST_POSITIVE_FIXNUM, string_chars_consed)); | |
5908 | consed[5] = make_number (min (MOST_POSITIVE_FIXNUM, misc_objects_consed)); | |
5909 | consed[6] = make_number (min (MOST_POSITIVE_FIXNUM, intervals_consed)); | |
5910 | consed[7] = make_number (min (MOST_POSITIVE_FIXNUM, strings_consed)); | |
310ea200 | 5911 | |
2e471eb5 | 5912 | return Flist (8, consed); |
310ea200 | 5913 | } |
e0b8c689 KR |
5914 | |
5915 | int suppress_checking; | |
5916 | void | |
5917 | die (msg, file, line) | |
5918 | const char *msg; | |
5919 | const char *file; | |
5920 | int line; | |
5921 | { | |
5922 | fprintf (stderr, "\r\nEmacs fatal error: %s:%d: %s\r\n", | |
5923 | file, line, msg); | |
5924 | abort (); | |
5925 | } | |
20d24714 | 5926 | \f |
7146af97 JB |
5927 | /* Initialization */ |
5928 | ||
dfcf069d | 5929 | void |
7146af97 JB |
5930 | init_alloc_once () |
5931 | { | |
5932 | /* Used to do Vpurify_flag = Qt here, but Qt isn't set up yet! */ | |
9e713715 GM |
5933 | purebeg = PUREBEG; |
5934 | pure_size = PURESIZE; | |
1f0b3fd2 | 5935 | pure_bytes_used = 0; |
9e713715 GM |
5936 | pure_bytes_used_before_overflow = 0; |
5937 | ||
ab6780cd SM |
5938 | /* Initialize the list of free aligned blocks. */ |
5939 | free_ablock = NULL; | |
5940 | ||
877935b1 | 5941 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
34400008 GM |
5942 | mem_init (); |
5943 | Vdead = make_pure_string ("DEAD", 4, 4, 0); | |
5944 | #endif | |
9e713715 | 5945 | |
7146af97 JB |
5946 | all_vectors = 0; |
5947 | ignore_warnings = 1; | |
d1658221 RS |
5948 | #ifdef DOUG_LEA_MALLOC |
5949 | mallopt (M_TRIM_THRESHOLD, 128*1024); /* trim threshold */ | |
5950 | mallopt (M_MMAP_THRESHOLD, 64*1024); /* mmap threshold */ | |
81d492d5 | 5951 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); /* max. number of mmap'ed areas */ |
d1658221 | 5952 | #endif |
7146af97 JB |
5953 | init_strings (); |
5954 | init_cons (); | |
5955 | init_symbol (); | |
5956 | init_marker (); | |
7146af97 | 5957 | init_float (); |
34400008 | 5958 | init_intervals (); |
d5e35230 | 5959 | |
276cbe5a RS |
5960 | #ifdef REL_ALLOC |
5961 | malloc_hysteresis = 32; | |
5962 | #else | |
5963 | malloc_hysteresis = 0; | |
5964 | #endif | |
5965 | ||
5966 | spare_memory = (char *) malloc (SPARE_MEMORY); | |
5967 | ||
7146af97 JB |
5968 | ignore_warnings = 0; |
5969 | gcprolist = 0; | |
630686c8 | 5970 | byte_stack_list = 0; |
7146af97 JB |
5971 | staticidx = 0; |
5972 | consing_since_gc = 0; | |
7d179cea | 5973 | gc_cons_threshold = 100000 * sizeof (Lisp_Object); |
7146af97 JB |
5974 | #ifdef VIRT_ADDR_VARIES |
5975 | malloc_sbrk_unused = 1<<22; /* A large number */ | |
5976 | malloc_sbrk_used = 100000; /* as reasonable as any number */ | |
5977 | #endif /* VIRT_ADDR_VARIES */ | |
5978 | } | |
5979 | ||
dfcf069d | 5980 | void |
7146af97 JB |
5981 | init_alloc () |
5982 | { | |
5983 | gcprolist = 0; | |
630686c8 | 5984 | byte_stack_list = 0; |
182ff242 GM |
5985 | #if GC_MARK_STACK |
5986 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
5987 | setjmp_tested_p = longjmps_done = 0; | |
5988 | #endif | |
5989 | #endif | |
2c5bd608 DL |
5990 | Vgc_elapsed = make_float (0.0); |
5991 | gcs_done = 0; | |
7146af97 JB |
5992 | } |
5993 | ||
5994 | void | |
5995 | syms_of_alloc () | |
5996 | { | |
7ee72033 | 5997 | DEFVAR_INT ("gc-cons-threshold", &gc_cons_threshold, |
a6266d23 | 5998 | doc: /* *Number of bytes of consing between garbage collections. |
228299fa GM |
5999 | Garbage collection can happen automatically once this many bytes have been |
6000 | allocated since the last garbage collection. All data types count. | |
7146af97 | 6001 | |
228299fa | 6002 | Garbage collection happens automatically only when `eval' is called. |
7146af97 | 6003 | |
228299fa GM |
6004 | By binding this temporarily to a large number, you can effectively |
6005 | prevent garbage collection during a part of the program. */); | |
0819585c | 6006 | |
7ee72033 | 6007 | DEFVAR_INT ("pure-bytes-used", &pure_bytes_used, |
a6266d23 | 6008 | doc: /* Number of bytes of sharable Lisp data allocated so far. */); |
0819585c | 6009 | |
7ee72033 | 6010 | DEFVAR_INT ("cons-cells-consed", &cons_cells_consed, |
a6266d23 | 6011 | doc: /* Number of cons cells that have been consed so far. */); |
0819585c | 6012 | |
7ee72033 | 6013 | DEFVAR_INT ("floats-consed", &floats_consed, |
a6266d23 | 6014 | doc: /* Number of floats that have been consed so far. */); |
0819585c | 6015 | |
7ee72033 | 6016 | DEFVAR_INT ("vector-cells-consed", &vector_cells_consed, |
a6266d23 | 6017 | doc: /* Number of vector cells that have been consed so far. */); |
0819585c | 6018 | |
7ee72033 | 6019 | DEFVAR_INT ("symbols-consed", &symbols_consed, |
a6266d23 | 6020 | doc: /* Number of symbols that have been consed so far. */); |
0819585c | 6021 | |
7ee72033 | 6022 | DEFVAR_INT ("string-chars-consed", &string_chars_consed, |
a6266d23 | 6023 | doc: /* Number of string characters that have been consed so far. */); |
0819585c | 6024 | |
7ee72033 | 6025 | DEFVAR_INT ("misc-objects-consed", &misc_objects_consed, |
a6266d23 | 6026 | doc: /* Number of miscellaneous objects that have been consed so far. */); |
2e471eb5 | 6027 | |
7ee72033 | 6028 | DEFVAR_INT ("intervals-consed", &intervals_consed, |
a6266d23 | 6029 | doc: /* Number of intervals that have been consed so far. */); |
7146af97 | 6030 | |
7ee72033 | 6031 | DEFVAR_INT ("strings-consed", &strings_consed, |
a6266d23 | 6032 | doc: /* Number of strings that have been consed so far. */); |
228299fa | 6033 | |
7ee72033 | 6034 | DEFVAR_LISP ("purify-flag", &Vpurify_flag, |
a6266d23 | 6035 | doc: /* Non-nil means loading Lisp code in order to dump an executable. |
228299fa GM |
6036 | This means that certain objects should be allocated in shared (pure) space. */); |
6037 | ||
7ee72033 | 6038 | DEFVAR_BOOL ("garbage-collection-messages", &garbage_collection_messages, |
a6266d23 | 6039 | doc: /* Non-nil means display messages at start and end of garbage collection. */); |
299585ee RS |
6040 | garbage_collection_messages = 0; |
6041 | ||
7ee72033 | 6042 | DEFVAR_LISP ("post-gc-hook", &Vpost_gc_hook, |
a6266d23 | 6043 | doc: /* Hook run after garbage collection has finished. */); |
9e713715 GM |
6044 | Vpost_gc_hook = Qnil; |
6045 | Qpost_gc_hook = intern ("post-gc-hook"); | |
6046 | staticpro (&Qpost_gc_hook); | |
6047 | ||
74a54b04 RS |
6048 | DEFVAR_LISP ("memory-signal-data", &Vmemory_signal_data, |
6049 | doc: /* Precomputed `signal' argument for memory-full error. */); | |
bcb61d60 KH |
6050 | /* We build this in advance because if we wait until we need it, we might |
6051 | not be able to allocate the memory to hold it. */ | |
74a54b04 RS |
6052 | Vmemory_signal_data |
6053 | = list2 (Qerror, | |
6054 | build_string ("Memory exhausted--use M-x save-some-buffers then exit and restart Emacs")); | |
6055 | ||
6056 | DEFVAR_LISP ("memory-full", &Vmemory_full, | |
6057 | doc: /* Non-nil means we are handling a memory-full error. */); | |
6058 | Vmemory_full = Qnil; | |
bcb61d60 | 6059 | |
e8197642 RS |
6060 | staticpro (&Qgc_cons_threshold); |
6061 | Qgc_cons_threshold = intern ("gc-cons-threshold"); | |
6062 | ||
a59de17b RS |
6063 | staticpro (&Qchar_table_extra_slots); |
6064 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
6065 | ||
2c5bd608 DL |
6066 | DEFVAR_LISP ("gc-elapsed", &Vgc_elapsed, |
6067 | doc: /* Accumulated time elapsed in garbage collections. | |
e7415487 | 6068 | The time is in seconds as a floating point value. */); |
2c5bd608 | 6069 | DEFVAR_INT ("gcs-done", &gcs_done, |
e7415487 | 6070 | doc: /* Accumulated number of garbage collections done. */); |
2c5bd608 | 6071 | |
7146af97 JB |
6072 | defsubr (&Scons); |
6073 | defsubr (&Slist); | |
6074 | defsubr (&Svector); | |
6075 | defsubr (&Smake_byte_code); | |
6076 | defsubr (&Smake_list); | |
6077 | defsubr (&Smake_vector); | |
7b07587b | 6078 | defsubr (&Smake_char_table); |
7146af97 | 6079 | defsubr (&Smake_string); |
7b07587b | 6080 | defsubr (&Smake_bool_vector); |
7146af97 JB |
6081 | defsubr (&Smake_symbol); |
6082 | defsubr (&Smake_marker); | |
6083 | defsubr (&Spurecopy); | |
6084 | defsubr (&Sgarbage_collect); | |
20d24714 | 6085 | defsubr (&Smemory_limit); |
310ea200 | 6086 | defsubr (&Smemory_use_counts); |
34400008 GM |
6087 | |
6088 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
6089 | defsubr (&Sgc_status); | |
6090 | #endif | |
7146af97 | 6091 | } |
ab5796a9 MB |
6092 | |
6093 | /* arch-tag: 6695ca10-e3c5-4c2c-8bc3-ed26a7dda857 | |
6094 | (do not change this comment) */ |