Commit | Line | Data |
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7146af97 | 1 | /* Storage allocation and gc for GNU Emacs Lisp interpreter. |
126f9c02 | 2 | Copyright (C) 1985, 1986, 1988, 1993, 1994, 1995, 1997, 1998, 1999, |
114f9c96 | 3 | 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
8cabe764 | 4 | Free Software Foundation, Inc. |
7146af97 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
7146af97 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
7146af97 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
7146af97 | 20 | |
18160b98 | 21 | #include <config.h> |
e9b309ac | 22 | #include <stdio.h> |
ab6780cd | 23 | #include <limits.h> /* For CHAR_BIT. */ |
d7306fe6 | 24 | #include <setjmp.h> |
92939d31 | 25 | |
4455ad75 RS |
26 | #ifdef ALLOC_DEBUG |
27 | #undef INLINE | |
28 | #endif | |
29 | ||
68c45bf0 | 30 | #include <signal.h> |
92939d31 | 31 | |
aa477689 JD |
32 | #ifdef HAVE_GTK_AND_PTHREAD |
33 | #include <pthread.h> | |
34 | #endif | |
35 | ||
7539e11f KR |
36 | /* This file is part of the core Lisp implementation, and thus must |
37 | deal with the real data structures. If the Lisp implementation is | |
38 | replaced, this file likely will not be used. */ | |
2e471eb5 | 39 | |
7539e11f | 40 | #undef HIDE_LISP_IMPLEMENTATION |
7146af97 | 41 | #include "lisp.h" |
ece93c02 | 42 | #include "process.h" |
d5e35230 | 43 | #include "intervals.h" |
4c0be5f4 | 44 | #include "puresize.h" |
7146af97 JB |
45 | #include "buffer.h" |
46 | #include "window.h" | |
2538fae4 | 47 | #include "keyboard.h" |
502b9b64 | 48 | #include "frame.h" |
9ac0d9e0 | 49 | #include "blockinput.h" |
9d80e883 | 50 | #include "character.h" |
e065a56e | 51 | #include "syssignal.h" |
4a729fd8 | 52 | #include "termhooks.h" /* For struct terminal. */ |
34400008 | 53 | #include <setjmp.h> |
e065a56e | 54 | |
6b61353c KH |
55 | /* GC_MALLOC_CHECK defined means perform validity checks of malloc'd |
56 | memory. Can do this only if using gmalloc.c. */ | |
57 | ||
58 | #if defined SYSTEM_MALLOC || defined DOUG_LEA_MALLOC | |
59 | #undef GC_MALLOC_CHECK | |
60 | #endif | |
61 | ||
bf952fb6 DL |
62 | #ifdef HAVE_UNISTD_H |
63 | #include <unistd.h> | |
64 | #else | |
65 | extern POINTER_TYPE *sbrk (); | |
66 | #endif | |
ee1eea5c | 67 | |
de7124a7 | 68 | #include <fcntl.h> |
de7124a7 | 69 | |
69666f77 | 70 | #ifdef WINDOWSNT |
f892cf9c | 71 | #include "w32.h" |
69666f77 EZ |
72 | #endif |
73 | ||
d1658221 | 74 | #ifdef DOUG_LEA_MALLOC |
2e471eb5 | 75 | |
d1658221 | 76 | #include <malloc.h> |
3e60b029 DL |
77 | /* malloc.h #defines this as size_t, at least in glibc2. */ |
78 | #ifndef __malloc_size_t | |
d1658221 | 79 | #define __malloc_size_t int |
3e60b029 | 80 | #endif |
81d492d5 | 81 | |
2e471eb5 GM |
82 | /* Specify maximum number of areas to mmap. It would be nice to use a |
83 | value that explicitly means "no limit". */ | |
84 | ||
81d492d5 RS |
85 | #define MMAP_MAX_AREAS 100000000 |
86 | ||
2e471eb5 GM |
87 | #else /* not DOUG_LEA_MALLOC */ |
88 | ||
276cbe5a RS |
89 | /* The following come from gmalloc.c. */ |
90 | ||
276cbe5a | 91 | #define __malloc_size_t size_t |
276cbe5a | 92 | extern __malloc_size_t _bytes_used; |
3e60b029 | 93 | extern __malloc_size_t __malloc_extra_blocks; |
2e471eb5 GM |
94 | |
95 | #endif /* not DOUG_LEA_MALLOC */ | |
276cbe5a | 96 | |
aa477689 JD |
97 | #if ! defined (SYSTEM_MALLOC) && defined (HAVE_GTK_AND_PTHREAD) |
98 | ||
f415cacd JD |
99 | /* When GTK uses the file chooser dialog, different backends can be loaded |
100 | dynamically. One such a backend is the Gnome VFS backend that gets loaded | |
101 | if you run Gnome. That backend creates several threads and also allocates | |
102 | memory with malloc. | |
103 | ||
104 | If Emacs sets malloc hooks (! SYSTEM_MALLOC) and the emacs_blocked_* | |
105 | functions below are called from malloc, there is a chance that one | |
106 | of these threads preempts the Emacs main thread and the hook variables | |
333f1b6f | 107 | end up in an inconsistent state. So we have a mutex to prevent that (note |
f415cacd JD |
108 | that the backend handles concurrent access to malloc within its own threads |
109 | but Emacs code running in the main thread is not included in that control). | |
110 | ||
026cdede | 111 | When UNBLOCK_INPUT is called, reinvoke_input_signal may be called. If this |
f415cacd JD |
112 | happens in one of the backend threads we will have two threads that tries |
113 | to run Emacs code at once, and the code is not prepared for that. | |
114 | To prevent that, we only call BLOCK/UNBLOCK from the main thread. */ | |
115 | ||
aa477689 | 116 | static pthread_mutex_t alloc_mutex; |
aa477689 | 117 | |
959dc601 JD |
118 | #define BLOCK_INPUT_ALLOC \ |
119 | do \ | |
120 | { \ | |
121 | if (pthread_equal (pthread_self (), main_thread)) \ | |
86302e37 | 122 | BLOCK_INPUT; \ |
959dc601 JD |
123 | pthread_mutex_lock (&alloc_mutex); \ |
124 | } \ | |
aa477689 | 125 | while (0) |
959dc601 JD |
126 | #define UNBLOCK_INPUT_ALLOC \ |
127 | do \ | |
128 | { \ | |
129 | pthread_mutex_unlock (&alloc_mutex); \ | |
130 | if (pthread_equal (pthread_self (), main_thread)) \ | |
86302e37 | 131 | UNBLOCK_INPUT; \ |
959dc601 | 132 | } \ |
aa477689 JD |
133 | while (0) |
134 | ||
135 | #else /* SYSTEM_MALLOC || not HAVE_GTK_AND_PTHREAD */ | |
136 | ||
137 | #define BLOCK_INPUT_ALLOC BLOCK_INPUT | |
138 | #define UNBLOCK_INPUT_ALLOC UNBLOCK_INPUT | |
139 | ||
140 | #endif /* SYSTEM_MALLOC || not HAVE_GTK_AND_PTHREAD */ | |
141 | ||
276cbe5a | 142 | /* Value of _bytes_used, when spare_memory was freed. */ |
2e471eb5 | 143 | |
276cbe5a RS |
144 | static __malloc_size_t bytes_used_when_full; |
145 | ||
4d74a5fc RS |
146 | static __malloc_size_t bytes_used_when_reconsidered; |
147 | ||
2e471eb5 GM |
148 | /* Mark, unmark, query mark bit of a Lisp string. S must be a pointer |
149 | to a struct Lisp_String. */ | |
150 | ||
7cdee936 SM |
151 | #define MARK_STRING(S) ((S)->size |= ARRAY_MARK_FLAG) |
152 | #define UNMARK_STRING(S) ((S)->size &= ~ARRAY_MARK_FLAG) | |
b059de99 | 153 | #define STRING_MARKED_P(S) (((S)->size & ARRAY_MARK_FLAG) != 0) |
2e471eb5 | 154 | |
3ef06d12 SM |
155 | #define VECTOR_MARK(V) ((V)->size |= ARRAY_MARK_FLAG) |
156 | #define VECTOR_UNMARK(V) ((V)->size &= ~ARRAY_MARK_FLAG) | |
b059de99 | 157 | #define VECTOR_MARKED_P(V) (((V)->size & ARRAY_MARK_FLAG) != 0) |
3ef06d12 | 158 | |
2e471eb5 GM |
159 | /* Value is the number of bytes/chars of S, a pointer to a struct |
160 | Lisp_String. This must be used instead of STRING_BYTES (S) or | |
161 | S->size during GC, because S->size contains the mark bit for | |
162 | strings. */ | |
163 | ||
3ef06d12 | 164 | #define GC_STRING_BYTES(S) (STRING_BYTES (S)) |
7cdee936 | 165 | #define GC_STRING_CHARS(S) ((S)->size & ~ARRAY_MARK_FLAG) |
2e471eb5 GM |
166 | |
167 | /* Number of bytes of consing done since the last gc. */ | |
168 | ||
7146af97 JB |
169 | int consing_since_gc; |
170 | ||
310ea200 | 171 | /* Count the amount of consing of various sorts of space. */ |
2e471eb5 | 172 | |
31ade731 SM |
173 | EMACS_INT cons_cells_consed; |
174 | EMACS_INT floats_consed; | |
175 | EMACS_INT vector_cells_consed; | |
176 | EMACS_INT symbols_consed; | |
177 | EMACS_INT string_chars_consed; | |
178 | EMACS_INT misc_objects_consed; | |
179 | EMACS_INT intervals_consed; | |
180 | EMACS_INT strings_consed; | |
2e471eb5 | 181 | |
974aae61 RS |
182 | /* Minimum number of bytes of consing since GC before next GC. */ |
183 | ||
184 | EMACS_INT gc_cons_threshold; | |
185 | ||
186 | /* Similar minimum, computed from Vgc_cons_percentage. */ | |
187 | ||
188 | EMACS_INT gc_relative_threshold; | |
310ea200 | 189 | |
96f077ad | 190 | static Lisp_Object Vgc_cons_percentage; |
7146af97 | 191 | |
24d8a105 RS |
192 | /* Minimum number of bytes of consing since GC before next GC, |
193 | when memory is full. */ | |
194 | ||
195 | EMACS_INT memory_full_cons_threshold; | |
196 | ||
2e471eb5 GM |
197 | /* Nonzero during GC. */ |
198 | ||
7146af97 JB |
199 | int gc_in_progress; |
200 | ||
3de0effb RS |
201 | /* Nonzero means abort if try to GC. |
202 | This is for code which is written on the assumption that | |
203 | no GC will happen, so as to verify that assumption. */ | |
204 | ||
205 | int abort_on_gc; | |
206 | ||
299585ee | 207 | /* Nonzero means display messages at beginning and end of GC. */ |
2e471eb5 | 208 | |
299585ee RS |
209 | int garbage_collection_messages; |
210 | ||
34400008 GM |
211 | /* Number of live and free conses etc. */ |
212 | ||
213 | static int total_conses, total_markers, total_symbols, total_vector_size; | |
214 | static int total_free_conses, total_free_markers, total_free_symbols; | |
215 | static int total_free_floats, total_floats; | |
fd27a537 | 216 | |
2e471eb5 | 217 | /* Points to memory space allocated as "spare", to be freed if we run |
24d8a105 RS |
218 | out of memory. We keep one large block, four cons-blocks, and |
219 | two string blocks. */ | |
2e471eb5 | 220 | |
d3d47262 | 221 | static char *spare_memory[7]; |
276cbe5a | 222 | |
24d8a105 | 223 | /* Amount of spare memory to keep in large reserve block. */ |
2e471eb5 | 224 | |
276cbe5a RS |
225 | #define SPARE_MEMORY (1 << 14) |
226 | ||
227 | /* Number of extra blocks malloc should get when it needs more core. */ | |
2e471eb5 | 228 | |
276cbe5a RS |
229 | static int malloc_hysteresis; |
230 | ||
2e471eb5 GM |
231 | /* Non-nil means defun should do purecopy on the function definition. */ |
232 | ||
7146af97 JB |
233 | Lisp_Object Vpurify_flag; |
234 | ||
74a54b04 RS |
235 | /* Non-nil means we are handling a memory-full error. */ |
236 | ||
237 | Lisp_Object Vmemory_full; | |
238 | ||
1b8950e5 RS |
239 | /* Initialize it to a nonzero value to force it into data space |
240 | (rather than bss space). That way unexec will remap it into text | |
241 | space (pure), on some systems. We have not implemented the | |
242 | remapping on more recent systems because this is less important | |
243 | nowadays than in the days of small memories and timesharing. */ | |
2e471eb5 | 244 | |
2c4685ee | 245 | EMACS_INT pure[(PURESIZE + sizeof (EMACS_INT) - 1) / sizeof (EMACS_INT)] = {1,}; |
7146af97 | 246 | #define PUREBEG (char *) pure |
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 | |
e5bc14d4 | 266 | /* Total number of bytes allocated in pure storage. */ |
2e471eb5 | 267 | |
31ade731 | 268 | EMACS_INT pure_bytes_used; |
7146af97 | 269 | |
e5bc14d4 YM |
270 | /* Index in pure at which next pure Lisp object will be allocated.. */ |
271 | ||
272 | static EMACS_INT pure_bytes_used_lisp; | |
273 | ||
274 | /* Number of bytes allocated for non-Lisp objects in pure storage. */ | |
275 | ||
276 | static EMACS_INT pure_bytes_used_non_lisp; | |
277 | ||
2e471eb5 GM |
278 | /* If nonzero, this is a warning delivered by malloc and not yet |
279 | displayed. */ | |
280 | ||
a8fe7202 | 281 | const char *pending_malloc_warning; |
7146af97 | 282 | |
bcb61d60 | 283 | /* Pre-computed signal argument for use when memory is exhausted. */ |
2e471eb5 | 284 | |
74a54b04 | 285 | Lisp_Object Vmemory_signal_data; |
bcb61d60 | 286 | |
7146af97 JB |
287 | /* Maximum amount of C stack to save when a GC happens. */ |
288 | ||
289 | #ifndef MAX_SAVE_STACK | |
290 | #define MAX_SAVE_STACK 16000 | |
291 | #endif | |
292 | ||
293 | /* Buffer in which we save a copy of the C stack at each GC. */ | |
294 | ||
d3d47262 JB |
295 | static char *stack_copy; |
296 | static int stack_copy_size; | |
7146af97 | 297 | |
2e471eb5 GM |
298 | /* Non-zero means ignore malloc warnings. Set during initialization. |
299 | Currently not used. */ | |
300 | ||
d3d47262 | 301 | static int ignore_warnings; |
350273a4 | 302 | |
a59de17b | 303 | Lisp_Object Qgc_cons_threshold, Qchar_table_extra_slots; |
e8197642 | 304 | |
9e713715 GM |
305 | /* Hook run after GC has finished. */ |
306 | ||
307 | Lisp_Object Vpost_gc_hook, Qpost_gc_hook; | |
308 | ||
2c5bd608 DL |
309 | Lisp_Object Vgc_elapsed; /* accumulated elapsed time in GC */ |
310 | EMACS_INT gcs_done; /* accumulated GCs */ | |
311 | ||
f57e2426 J |
312 | static void mark_buffer (Lisp_Object); |
313 | static void mark_terminals (void); | |
314 | extern void mark_kboards (void); | |
315 | extern void mark_ttys (void); | |
316 | extern void mark_backtrace (void); | |
317 | static void gc_sweep (void); | |
318 | static void mark_glyph_matrix (struct glyph_matrix *); | |
319 | static void mark_face_cache (struct face_cache *); | |
41c28a37 GM |
320 | |
321 | #ifdef HAVE_WINDOW_SYSTEM | |
f57e2426 | 322 | extern void mark_fringe_data (void); |
41c28a37 GM |
323 | #endif /* HAVE_WINDOW_SYSTEM */ |
324 | ||
f57e2426 J |
325 | static struct Lisp_String *allocate_string (void); |
326 | static void compact_small_strings (void); | |
327 | static void free_large_strings (void); | |
328 | static void sweep_strings (void); | |
7da0b0d3 RS |
329 | |
330 | extern int message_enable_multibyte; | |
34400008 | 331 | |
34400008 GM |
332 | /* When scanning the C stack for live Lisp objects, Emacs keeps track |
333 | of what memory allocated via lisp_malloc is intended for what | |
334 | purpose. This enumeration specifies the type of memory. */ | |
335 | ||
336 | enum mem_type | |
337 | { | |
338 | MEM_TYPE_NON_LISP, | |
339 | MEM_TYPE_BUFFER, | |
340 | MEM_TYPE_CONS, | |
341 | MEM_TYPE_STRING, | |
342 | MEM_TYPE_MISC, | |
343 | MEM_TYPE_SYMBOL, | |
344 | MEM_TYPE_FLOAT, | |
9c545a55 SM |
345 | /* We used to keep separate mem_types for subtypes of vectors such as |
346 | process, hash_table, frame, terminal, and window, but we never made | |
347 | use of the distinction, so it only caused source-code complexity | |
348 | and runtime slowdown. Minor but pointless. */ | |
349 | MEM_TYPE_VECTORLIKE | |
34400008 GM |
350 | }; |
351 | ||
f57e2426 J |
352 | static POINTER_TYPE *lisp_align_malloc (size_t, enum mem_type); |
353 | static POINTER_TYPE *lisp_malloc (size_t, enum mem_type); | |
225ccad6 | 354 | |
24d8a105 | 355 | |
877935b1 | 356 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
0b378936 GM |
357 | |
358 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
359 | #include <stdio.h> /* For fprintf. */ | |
360 | #endif | |
361 | ||
362 | /* A unique object in pure space used to make some Lisp objects | |
363 | on free lists recognizable in O(1). */ | |
364 | ||
d3d47262 | 365 | static Lisp_Object Vdead; |
0b378936 | 366 | |
877935b1 GM |
367 | #ifdef GC_MALLOC_CHECK |
368 | ||
369 | enum mem_type allocated_mem_type; | |
d3d47262 | 370 | static int dont_register_blocks; |
877935b1 GM |
371 | |
372 | #endif /* GC_MALLOC_CHECK */ | |
373 | ||
374 | /* A node in the red-black tree describing allocated memory containing | |
375 | Lisp data. Each such block is recorded with its start and end | |
376 | address when it is allocated, and removed from the tree when it | |
377 | is freed. | |
378 | ||
379 | A red-black tree is a balanced binary tree with the following | |
380 | properties: | |
381 | ||
382 | 1. Every node is either red or black. | |
383 | 2. Every leaf is black. | |
384 | 3. If a node is red, then both of its children are black. | |
385 | 4. Every simple path from a node to a descendant leaf contains | |
386 | the same number of black nodes. | |
387 | 5. The root is always black. | |
388 | ||
389 | When nodes are inserted into the tree, or deleted from the tree, | |
390 | the tree is "fixed" so that these properties are always true. | |
391 | ||
392 | A red-black tree with N internal nodes has height at most 2 | |
393 | log(N+1). Searches, insertions and deletions are done in O(log N). | |
394 | Please see a text book about data structures for a detailed | |
395 | description of red-black trees. Any book worth its salt should | |
396 | describe them. */ | |
397 | ||
398 | struct mem_node | |
399 | { | |
9f7d9210 RS |
400 | /* Children of this node. These pointers are never NULL. When there |
401 | is no child, the value is MEM_NIL, which points to a dummy node. */ | |
402 | struct mem_node *left, *right; | |
403 | ||
404 | /* The parent of this node. In the root node, this is NULL. */ | |
405 | struct mem_node *parent; | |
877935b1 GM |
406 | |
407 | /* Start and end of allocated region. */ | |
408 | void *start, *end; | |
409 | ||
410 | /* Node color. */ | |
411 | enum {MEM_BLACK, MEM_RED} color; | |
177c0ea7 | 412 | |
877935b1 GM |
413 | /* Memory type. */ |
414 | enum mem_type type; | |
415 | }; | |
416 | ||
417 | /* Base address of stack. Set in main. */ | |
418 | ||
419 | Lisp_Object *stack_base; | |
420 | ||
421 | /* Root of the tree describing allocated Lisp memory. */ | |
422 | ||
423 | static struct mem_node *mem_root; | |
424 | ||
ece93c02 GM |
425 | /* Lowest and highest known address in the heap. */ |
426 | ||
427 | static void *min_heap_address, *max_heap_address; | |
428 | ||
877935b1 GM |
429 | /* Sentinel node of the tree. */ |
430 | ||
431 | static struct mem_node mem_z; | |
432 | #define MEM_NIL &mem_z | |
433 | ||
f57e2426 J |
434 | static struct Lisp_Vector *allocate_vectorlike (EMACS_INT); |
435 | static void lisp_free (POINTER_TYPE *); | |
436 | static void mark_stack (void); | |
437 | static int live_vector_p (struct mem_node *, void *); | |
438 | static int live_buffer_p (struct mem_node *, void *); | |
439 | static int live_string_p (struct mem_node *, void *); | |
440 | static int live_cons_p (struct mem_node *, void *); | |
441 | static int live_symbol_p (struct mem_node *, void *); | |
442 | static int live_float_p (struct mem_node *, void *); | |
443 | static int live_misc_p (struct mem_node *, void *); | |
444 | static void mark_maybe_object (Lisp_Object); | |
445 | static void mark_memory (void *, void *, int); | |
446 | static void mem_init (void); | |
447 | static struct mem_node *mem_insert (void *, void *, enum mem_type); | |
448 | static void mem_insert_fixup (struct mem_node *); | |
449 | static void mem_rotate_left (struct mem_node *); | |
450 | static void mem_rotate_right (struct mem_node *); | |
451 | static void mem_delete (struct mem_node *); | |
452 | static void mem_delete_fixup (struct mem_node *); | |
453 | static INLINE struct mem_node *mem_find (void *); | |
34400008 | 454 | |
34400008 GM |
455 | |
456 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
f57e2426 | 457 | static void check_gcpros (void); |
34400008 GM |
458 | #endif |
459 | ||
877935b1 | 460 | #endif /* GC_MARK_STACK || GC_MALLOC_CHECK */ |
34400008 | 461 | |
1f0b3fd2 GM |
462 | /* Recording what needs to be marked for gc. */ |
463 | ||
464 | struct gcpro *gcprolist; | |
465 | ||
379b98b1 PE |
466 | /* Addresses of staticpro'd variables. Initialize it to a nonzero |
467 | value; otherwise some compilers put it into BSS. */ | |
1f0b3fd2 | 468 | |
0078170f | 469 | #define NSTATICS 0x640 |
d3d47262 | 470 | static Lisp_Object *staticvec[NSTATICS] = {&Vpurify_flag}; |
1f0b3fd2 GM |
471 | |
472 | /* Index of next unused slot in staticvec. */ | |
473 | ||
d3d47262 | 474 | static int staticidx = 0; |
1f0b3fd2 | 475 | |
f57e2426 | 476 | static POINTER_TYPE *pure_alloc (size_t, int); |
1f0b3fd2 GM |
477 | |
478 | ||
479 | /* Value is SZ rounded up to the next multiple of ALIGNMENT. | |
480 | ALIGNMENT must be a power of 2. */ | |
481 | ||
ab6780cd SM |
482 | #define ALIGN(ptr, ALIGNMENT) \ |
483 | ((POINTER_TYPE *) ((((EMACS_UINT)(ptr)) + (ALIGNMENT) - 1) \ | |
484 | & ~((ALIGNMENT) - 1))) | |
1f0b3fd2 | 485 | |
ece93c02 | 486 | |
7146af97 | 487 | \f |
34400008 GM |
488 | /************************************************************************ |
489 | Malloc | |
490 | ************************************************************************/ | |
491 | ||
4455ad75 | 492 | /* Function malloc calls this if it finds we are near exhausting storage. */ |
d457598b AS |
493 | |
494 | void | |
a8fe7202 | 495 | malloc_warning (const char *str) |
7146af97 JB |
496 | { |
497 | pending_malloc_warning = str; | |
498 | } | |
499 | ||
34400008 | 500 | |
4455ad75 | 501 | /* Display an already-pending malloc warning. */ |
34400008 | 502 | |
d457598b | 503 | void |
971de7fb | 504 | display_malloc_warning (void) |
7146af97 | 505 | { |
4455ad75 RS |
506 | call3 (intern ("display-warning"), |
507 | intern ("alloc"), | |
508 | build_string (pending_malloc_warning), | |
509 | intern ("emergency")); | |
7146af97 | 510 | pending_malloc_warning = 0; |
7146af97 JB |
511 | } |
512 | ||
34400008 | 513 | |
d1658221 | 514 | #ifdef DOUG_LEA_MALLOC |
4d74a5fc | 515 | # define BYTES_USED (mallinfo ().uordblks) |
d1658221 | 516 | #else |
1177ecf6 | 517 | # define BYTES_USED _bytes_used |
d1658221 | 518 | #endif |
49efed3a | 519 | \f |
276cbe5a RS |
520 | /* Called if we can't allocate relocatable space for a buffer. */ |
521 | ||
522 | void | |
971de7fb | 523 | buffer_memory_full (void) |
276cbe5a | 524 | { |
2e471eb5 GM |
525 | /* If buffers use the relocating allocator, no need to free |
526 | spare_memory, because we may have plenty of malloc space left | |
527 | that we could get, and if we don't, the malloc that fails will | |
528 | itself cause spare_memory to be freed. If buffers don't use the | |
529 | relocating allocator, treat this like any other failing | |
530 | malloc. */ | |
276cbe5a RS |
531 | |
532 | #ifndef REL_ALLOC | |
533 | memory_full (); | |
534 | #endif | |
535 | ||
2e471eb5 GM |
536 | /* This used to call error, but if we've run out of memory, we could |
537 | get infinite recursion trying to build the string. */ | |
9b306d37 | 538 | xsignal (Qnil, Vmemory_signal_data); |
7146af97 JB |
539 | } |
540 | ||
34400008 | 541 | |
212f33f1 KS |
542 | #ifdef XMALLOC_OVERRUN_CHECK |
543 | ||
bdbed949 KS |
544 | /* Check for overrun in malloc'ed buffers by wrapping a 16 byte header |
545 | and a 16 byte trailer around each block. | |
546 | ||
547 | The header consists of 12 fixed bytes + a 4 byte integer contaning the | |
548 | original block size, while the trailer consists of 16 fixed bytes. | |
549 | ||
550 | The header is used to detect whether this block has been allocated | |
551 | through these functions -- as it seems that some low-level libc | |
552 | functions may bypass the malloc hooks. | |
553 | */ | |
554 | ||
555 | ||
212f33f1 | 556 | #define XMALLOC_OVERRUN_CHECK_SIZE 16 |
bdbed949 | 557 | |
212f33f1 KS |
558 | static char xmalloc_overrun_check_header[XMALLOC_OVERRUN_CHECK_SIZE-4] = |
559 | { 0x9a, 0x9b, 0xae, 0xaf, | |
560 | 0xbf, 0xbe, 0xce, 0xcf, | |
561 | 0xea, 0xeb, 0xec, 0xed }; | |
562 | ||
563 | static char xmalloc_overrun_check_trailer[XMALLOC_OVERRUN_CHECK_SIZE] = | |
564 | { 0xaa, 0xab, 0xac, 0xad, | |
565 | 0xba, 0xbb, 0xbc, 0xbd, | |
566 | 0xca, 0xcb, 0xcc, 0xcd, | |
567 | 0xda, 0xdb, 0xdc, 0xdd }; | |
568 | ||
bdbed949 KS |
569 | /* Macros to insert and extract the block size in the header. */ |
570 | ||
571 | #define XMALLOC_PUT_SIZE(ptr, size) \ | |
572 | (ptr[-1] = (size & 0xff), \ | |
573 | ptr[-2] = ((size >> 8) & 0xff), \ | |
574 | ptr[-3] = ((size >> 16) & 0xff), \ | |
575 | ptr[-4] = ((size >> 24) & 0xff)) | |
576 | ||
577 | #define XMALLOC_GET_SIZE(ptr) \ | |
578 | (size_t)((unsigned)(ptr[-1]) | \ | |
579 | ((unsigned)(ptr[-2]) << 8) | \ | |
580 | ((unsigned)(ptr[-3]) << 16) | \ | |
581 | ((unsigned)(ptr[-4]) << 24)) | |
582 | ||
583 | ||
d8f165a8 JD |
584 | /* The call depth in overrun_check functions. For example, this might happen: |
585 | xmalloc() | |
586 | overrun_check_malloc() | |
587 | -> malloc -> (via hook)_-> emacs_blocked_malloc | |
588 | -> overrun_check_malloc | |
589 | call malloc (hooks are NULL, so real malloc is called). | |
590 | malloc returns 10000. | |
591 | add overhead, return 10016. | |
592 | <- (back in overrun_check_malloc) | |
857ae68b | 593 | add overhead again, return 10032 |
d8f165a8 | 594 | xmalloc returns 10032. |
857ae68b JD |
595 | |
596 | (time passes). | |
597 | ||
d8f165a8 JD |
598 | xfree(10032) |
599 | overrun_check_free(10032) | |
600 | decrease overhed | |
601 | free(10016) <- crash, because 10000 is the original pointer. */ | |
857ae68b JD |
602 | |
603 | static int check_depth; | |
604 | ||
bdbed949 KS |
605 | /* Like malloc, but wraps allocated block with header and trailer. */ |
606 | ||
212f33f1 KS |
607 | POINTER_TYPE * |
608 | overrun_check_malloc (size) | |
609 | size_t size; | |
610 | { | |
bdbed949 | 611 | register unsigned char *val; |
857ae68b | 612 | size_t overhead = ++check_depth == 1 ? XMALLOC_OVERRUN_CHECK_SIZE*2 : 0; |
212f33f1 | 613 | |
857ae68b JD |
614 | val = (unsigned char *) malloc (size + overhead); |
615 | if (val && check_depth == 1) | |
212f33f1 | 616 | { |
72af86bd AS |
617 | memcpy (val, xmalloc_overrun_check_header, |
618 | XMALLOC_OVERRUN_CHECK_SIZE - 4); | |
212f33f1 | 619 | val += XMALLOC_OVERRUN_CHECK_SIZE; |
bdbed949 | 620 | XMALLOC_PUT_SIZE(val, size); |
72af86bd AS |
621 | memcpy (val + size, xmalloc_overrun_check_trailer, |
622 | XMALLOC_OVERRUN_CHECK_SIZE); | |
212f33f1 | 623 | } |
857ae68b | 624 | --check_depth; |
212f33f1 KS |
625 | return (POINTER_TYPE *)val; |
626 | } | |
627 | ||
bdbed949 KS |
628 | |
629 | /* Like realloc, but checks old block for overrun, and wraps new block | |
630 | with header and trailer. */ | |
631 | ||
212f33f1 KS |
632 | POINTER_TYPE * |
633 | overrun_check_realloc (block, size) | |
634 | POINTER_TYPE *block; | |
635 | size_t size; | |
636 | { | |
bdbed949 | 637 | register unsigned char *val = (unsigned char *)block; |
857ae68b | 638 | size_t overhead = ++check_depth == 1 ? XMALLOC_OVERRUN_CHECK_SIZE*2 : 0; |
212f33f1 KS |
639 | |
640 | if (val | |
857ae68b | 641 | && check_depth == 1 |
72af86bd AS |
642 | && memcmp (xmalloc_overrun_check_header, |
643 | val - XMALLOC_OVERRUN_CHECK_SIZE, | |
644 | XMALLOC_OVERRUN_CHECK_SIZE - 4) == 0) | |
212f33f1 | 645 | { |
bdbed949 | 646 | size_t osize = XMALLOC_GET_SIZE (val); |
72af86bd AS |
647 | if (memcmp (xmalloc_overrun_check_trailer, val + osize, |
648 | XMALLOC_OVERRUN_CHECK_SIZE)) | |
212f33f1 | 649 | abort (); |
72af86bd | 650 | memset (val + osize, 0, XMALLOC_OVERRUN_CHECK_SIZE); |
212f33f1 | 651 | val -= XMALLOC_OVERRUN_CHECK_SIZE; |
72af86bd | 652 | memset (val, 0, XMALLOC_OVERRUN_CHECK_SIZE); |
212f33f1 KS |
653 | } |
654 | ||
857ae68b | 655 | val = (unsigned char *) realloc ((POINTER_TYPE *)val, size + overhead); |
212f33f1 | 656 | |
857ae68b | 657 | if (val && check_depth == 1) |
212f33f1 | 658 | { |
72af86bd AS |
659 | memcpy (val, xmalloc_overrun_check_header, |
660 | XMALLOC_OVERRUN_CHECK_SIZE - 4); | |
212f33f1 | 661 | val += XMALLOC_OVERRUN_CHECK_SIZE; |
bdbed949 | 662 | XMALLOC_PUT_SIZE(val, size); |
72af86bd AS |
663 | memcpy (val + size, xmalloc_overrun_check_trailer, |
664 | XMALLOC_OVERRUN_CHECK_SIZE); | |
212f33f1 | 665 | } |
857ae68b | 666 | --check_depth; |
212f33f1 KS |
667 | return (POINTER_TYPE *)val; |
668 | } | |
669 | ||
bdbed949 KS |
670 | /* Like free, but checks block for overrun. */ |
671 | ||
212f33f1 KS |
672 | void |
673 | overrun_check_free (block) | |
674 | POINTER_TYPE *block; | |
675 | { | |
bdbed949 | 676 | unsigned char *val = (unsigned char *)block; |
212f33f1 | 677 | |
857ae68b | 678 | ++check_depth; |
212f33f1 | 679 | if (val |
857ae68b | 680 | && check_depth == 1 |
72af86bd AS |
681 | && memcmp (xmalloc_overrun_check_header, |
682 | val - XMALLOC_OVERRUN_CHECK_SIZE, | |
683 | XMALLOC_OVERRUN_CHECK_SIZE - 4) == 0) | |
212f33f1 | 684 | { |
bdbed949 | 685 | size_t osize = XMALLOC_GET_SIZE (val); |
72af86bd AS |
686 | if (memcmp (xmalloc_overrun_check_trailer, val + osize, |
687 | XMALLOC_OVERRUN_CHECK_SIZE)) | |
212f33f1 | 688 | abort (); |
454d7973 KS |
689 | #ifdef XMALLOC_CLEAR_FREE_MEMORY |
690 | val -= XMALLOC_OVERRUN_CHECK_SIZE; | |
691 | memset (val, 0xff, osize + XMALLOC_OVERRUN_CHECK_SIZE*2); | |
692 | #else | |
72af86bd | 693 | memset (val + osize, 0, XMALLOC_OVERRUN_CHECK_SIZE); |
212f33f1 | 694 | val -= XMALLOC_OVERRUN_CHECK_SIZE; |
72af86bd | 695 | memset (val, 0, XMALLOC_OVERRUN_CHECK_SIZE); |
454d7973 | 696 | #endif |
212f33f1 KS |
697 | } |
698 | ||
699 | free (val); | |
857ae68b | 700 | --check_depth; |
212f33f1 KS |
701 | } |
702 | ||
703 | #undef malloc | |
704 | #undef realloc | |
705 | #undef free | |
706 | #define malloc overrun_check_malloc | |
707 | #define realloc overrun_check_realloc | |
708 | #define free overrun_check_free | |
709 | #endif | |
710 | ||
dafc79fa SM |
711 | #ifdef SYNC_INPUT |
712 | /* When using SYNC_INPUT, we don't call malloc from a signal handler, so | |
713 | there's no need to block input around malloc. */ | |
714 | #define MALLOC_BLOCK_INPUT ((void)0) | |
715 | #define MALLOC_UNBLOCK_INPUT ((void)0) | |
716 | #else | |
717 | #define MALLOC_BLOCK_INPUT BLOCK_INPUT | |
718 | #define MALLOC_UNBLOCK_INPUT UNBLOCK_INPUT | |
719 | #endif | |
bdbed949 | 720 | |
34400008 | 721 | /* Like malloc but check for no memory and block interrupt input.. */ |
7146af97 | 722 | |
c971ff9a | 723 | POINTER_TYPE * |
971de7fb | 724 | xmalloc (size_t size) |
7146af97 | 725 | { |
c971ff9a | 726 | register POINTER_TYPE *val; |
7146af97 | 727 | |
dafc79fa | 728 | MALLOC_BLOCK_INPUT; |
c971ff9a | 729 | val = (POINTER_TYPE *) malloc (size); |
dafc79fa | 730 | MALLOC_UNBLOCK_INPUT; |
7146af97 | 731 | |
2e471eb5 GM |
732 | if (!val && size) |
733 | memory_full (); | |
7146af97 JB |
734 | return val; |
735 | } | |
736 | ||
34400008 GM |
737 | |
738 | /* Like realloc but check for no memory and block interrupt input.. */ | |
739 | ||
c971ff9a | 740 | POINTER_TYPE * |
971de7fb | 741 | xrealloc (POINTER_TYPE *block, size_t size) |
7146af97 | 742 | { |
c971ff9a | 743 | register POINTER_TYPE *val; |
7146af97 | 744 | |
dafc79fa | 745 | MALLOC_BLOCK_INPUT; |
56d2031b JB |
746 | /* We must call malloc explicitly when BLOCK is 0, since some |
747 | reallocs don't do this. */ | |
748 | if (! block) | |
c971ff9a | 749 | val = (POINTER_TYPE *) malloc (size); |
f048679d | 750 | else |
c971ff9a | 751 | val = (POINTER_TYPE *) realloc (block, size); |
dafc79fa | 752 | MALLOC_UNBLOCK_INPUT; |
7146af97 JB |
753 | |
754 | if (!val && size) memory_full (); | |
755 | return val; | |
756 | } | |
9ac0d9e0 | 757 | |
34400008 | 758 | |
005ca5c7 | 759 | /* Like free but block interrupt input. */ |
34400008 | 760 | |
9ac0d9e0 | 761 | void |
971de7fb | 762 | xfree (POINTER_TYPE *block) |
9ac0d9e0 | 763 | { |
70fdbb46 JM |
764 | if (!block) |
765 | return; | |
dafc79fa | 766 | MALLOC_BLOCK_INPUT; |
9ac0d9e0 | 767 | free (block); |
dafc79fa | 768 | MALLOC_UNBLOCK_INPUT; |
24d8a105 RS |
769 | /* We don't call refill_memory_reserve here |
770 | because that duplicates doing so in emacs_blocked_free | |
771 | and the criterion should go there. */ | |
9ac0d9e0 JB |
772 | } |
773 | ||
c8099634 | 774 | |
dca7c6a8 GM |
775 | /* Like strdup, but uses xmalloc. */ |
776 | ||
777 | char * | |
971de7fb | 778 | xstrdup (const char *s) |
dca7c6a8 | 779 | { |
675d5130 | 780 | size_t len = strlen (s) + 1; |
dca7c6a8 | 781 | char *p = (char *) xmalloc (len); |
72af86bd | 782 | memcpy (p, s, len); |
dca7c6a8 GM |
783 | return p; |
784 | } | |
785 | ||
786 | ||
f61bef8b KS |
787 | /* Unwind for SAFE_ALLOCA */ |
788 | ||
789 | Lisp_Object | |
971de7fb | 790 | safe_alloca_unwind (Lisp_Object arg) |
f61bef8b | 791 | { |
b766f870 KS |
792 | register struct Lisp_Save_Value *p = XSAVE_VALUE (arg); |
793 | ||
794 | p->dogc = 0; | |
795 | xfree (p->pointer); | |
796 | p->pointer = 0; | |
7b7990cc | 797 | free_misc (arg); |
f61bef8b KS |
798 | return Qnil; |
799 | } | |
800 | ||
801 | ||
34400008 GM |
802 | /* Like malloc but used for allocating Lisp data. NBYTES is the |
803 | number of bytes to allocate, TYPE describes the intended use of the | |
804 | allcated memory block (for strings, for conses, ...). */ | |
805 | ||
212f33f1 | 806 | #ifndef USE_LSB_TAG |
918a23a7 | 807 | static void *lisp_malloc_loser; |
212f33f1 | 808 | #endif |
918a23a7 | 809 | |
675d5130 | 810 | static POINTER_TYPE * |
971de7fb | 811 | lisp_malloc (size_t nbytes, enum mem_type type) |
c8099634 | 812 | { |
34400008 | 813 | register void *val; |
c8099634 | 814 | |
dafc79fa | 815 | MALLOC_BLOCK_INPUT; |
877935b1 GM |
816 | |
817 | #ifdef GC_MALLOC_CHECK | |
818 | allocated_mem_type = type; | |
819 | #endif | |
177c0ea7 | 820 | |
34400008 | 821 | val = (void *) malloc (nbytes); |
c8099634 | 822 | |
6b61353c | 823 | #ifndef USE_LSB_TAG |
918a23a7 RS |
824 | /* If the memory just allocated cannot be addressed thru a Lisp |
825 | object's pointer, and it needs to be, | |
826 | that's equivalent to running out of memory. */ | |
827 | if (val && type != MEM_TYPE_NON_LISP) | |
828 | { | |
829 | Lisp_Object tem; | |
830 | XSETCONS (tem, (char *) val + nbytes - 1); | |
831 | if ((char *) XCONS (tem) != (char *) val + nbytes - 1) | |
832 | { | |
833 | lisp_malloc_loser = val; | |
834 | free (val); | |
835 | val = 0; | |
836 | } | |
837 | } | |
6b61353c | 838 | #endif |
918a23a7 | 839 | |
877935b1 | 840 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
dca7c6a8 | 841 | if (val && type != MEM_TYPE_NON_LISP) |
34400008 GM |
842 | mem_insert (val, (char *) val + nbytes, type); |
843 | #endif | |
177c0ea7 | 844 | |
dafc79fa | 845 | MALLOC_UNBLOCK_INPUT; |
dca7c6a8 GM |
846 | if (!val && nbytes) |
847 | memory_full (); | |
c8099634 RS |
848 | return val; |
849 | } | |
850 | ||
34400008 GM |
851 | /* Free BLOCK. This must be called to free memory allocated with a |
852 | call to lisp_malloc. */ | |
853 | ||
bf952fb6 | 854 | static void |
971de7fb | 855 | lisp_free (POINTER_TYPE *block) |
c8099634 | 856 | { |
dafc79fa | 857 | MALLOC_BLOCK_INPUT; |
c8099634 | 858 | free (block); |
877935b1 | 859 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
34400008 GM |
860 | mem_delete (mem_find (block)); |
861 | #endif | |
dafc79fa | 862 | MALLOC_UNBLOCK_INPUT; |
c8099634 | 863 | } |
34400008 | 864 | |
ab6780cd SM |
865 | /* Allocation of aligned blocks of memory to store Lisp data. */ |
866 | /* The entry point is lisp_align_malloc which returns blocks of at most */ | |
867 | /* BLOCK_BYTES and guarantees they are aligned on a BLOCK_ALIGN boundary. */ | |
868 | ||
349a4500 SM |
869 | /* Use posix_memalloc if the system has it and we're using the system's |
870 | malloc (because our gmalloc.c routines don't have posix_memalign although | |
871 | its memalloc could be used). */ | |
b4181b01 KS |
872 | #if defined (HAVE_POSIX_MEMALIGN) && defined (SYSTEM_MALLOC) |
873 | #define USE_POSIX_MEMALIGN 1 | |
874 | #endif | |
ab6780cd SM |
875 | |
876 | /* BLOCK_ALIGN has to be a power of 2. */ | |
877 | #define BLOCK_ALIGN (1 << 10) | |
ab6780cd SM |
878 | |
879 | /* Padding to leave at the end of a malloc'd block. This is to give | |
880 | malloc a chance to minimize the amount of memory wasted to alignment. | |
881 | It should be tuned to the particular malloc library used. | |
19bcad1f SM |
882 | On glibc-2.3.2, malloc never tries to align, so a padding of 0 is best. |
883 | posix_memalign on the other hand would ideally prefer a value of 4 | |
884 | because otherwise, there's 1020 bytes wasted between each ablocks. | |
f501ccb4 SM |
885 | In Emacs, testing shows that those 1020 can most of the time be |
886 | efficiently used by malloc to place other objects, so a value of 0 can | |
887 | still preferable unless you have a lot of aligned blocks and virtually | |
888 | nothing else. */ | |
19bcad1f SM |
889 | #define BLOCK_PADDING 0 |
890 | #define BLOCK_BYTES \ | |
f501ccb4 | 891 | (BLOCK_ALIGN - sizeof (struct ablock *) - BLOCK_PADDING) |
19bcad1f SM |
892 | |
893 | /* Internal data structures and constants. */ | |
894 | ||
ab6780cd SM |
895 | #define ABLOCKS_SIZE 16 |
896 | ||
897 | /* An aligned block of memory. */ | |
898 | struct ablock | |
899 | { | |
900 | union | |
901 | { | |
902 | char payload[BLOCK_BYTES]; | |
903 | struct ablock *next_free; | |
904 | } x; | |
905 | /* `abase' is the aligned base of the ablocks. */ | |
906 | /* It is overloaded to hold the virtual `busy' field that counts | |
907 | the number of used ablock in the parent ablocks. | |
908 | The first ablock has the `busy' field, the others have the `abase' | |
909 | field. To tell the difference, we assume that pointers will have | |
910 | integer values larger than 2 * ABLOCKS_SIZE. The lowest bit of `busy' | |
911 | is used to tell whether the real base of the parent ablocks is `abase' | |
912 | (if not, the word before the first ablock holds a pointer to the | |
913 | real base). */ | |
914 | struct ablocks *abase; | |
915 | /* The padding of all but the last ablock is unused. The padding of | |
916 | the last ablock in an ablocks is not allocated. */ | |
19bcad1f SM |
917 | #if BLOCK_PADDING |
918 | char padding[BLOCK_PADDING]; | |
ebb8d410 | 919 | #endif |
ab6780cd SM |
920 | }; |
921 | ||
922 | /* A bunch of consecutive aligned blocks. */ | |
923 | struct ablocks | |
924 | { | |
925 | struct ablock blocks[ABLOCKS_SIZE]; | |
926 | }; | |
927 | ||
928 | /* Size of the block requested from malloc or memalign. */ | |
19bcad1f | 929 | #define ABLOCKS_BYTES (sizeof (struct ablocks) - BLOCK_PADDING) |
ab6780cd SM |
930 | |
931 | #define ABLOCK_ABASE(block) \ | |
932 | (((unsigned long) (block)->abase) <= (1 + 2 * ABLOCKS_SIZE) \ | |
933 | ? (struct ablocks *)(block) \ | |
934 | : (block)->abase) | |
935 | ||
936 | /* Virtual `busy' field. */ | |
937 | #define ABLOCKS_BUSY(abase) ((abase)->blocks[0].abase) | |
938 | ||
939 | /* Pointer to the (not necessarily aligned) malloc block. */ | |
349a4500 | 940 | #ifdef USE_POSIX_MEMALIGN |
19bcad1f SM |
941 | #define ABLOCKS_BASE(abase) (abase) |
942 | #else | |
ab6780cd | 943 | #define ABLOCKS_BASE(abase) \ |
005ca5c7 | 944 | (1 & (long) ABLOCKS_BUSY (abase) ? abase : ((void**)abase)[-1]) |
19bcad1f | 945 | #endif |
ab6780cd SM |
946 | |
947 | /* The list of free ablock. */ | |
948 | static struct ablock *free_ablock; | |
949 | ||
950 | /* Allocate an aligned block of nbytes. | |
951 | Alignment is on a multiple of BLOCK_ALIGN and `nbytes' has to be | |
952 | smaller or equal to BLOCK_BYTES. */ | |
953 | static POINTER_TYPE * | |
971de7fb | 954 | lisp_align_malloc (size_t nbytes, enum mem_type type) |
ab6780cd SM |
955 | { |
956 | void *base, *val; | |
957 | struct ablocks *abase; | |
958 | ||
959 | eassert (nbytes <= BLOCK_BYTES); | |
960 | ||
dafc79fa | 961 | MALLOC_BLOCK_INPUT; |
ab6780cd SM |
962 | |
963 | #ifdef GC_MALLOC_CHECK | |
964 | allocated_mem_type = type; | |
965 | #endif | |
966 | ||
967 | if (!free_ablock) | |
968 | { | |
005ca5c7 DL |
969 | int i; |
970 | EMACS_INT aligned; /* int gets warning casting to 64-bit pointer. */ | |
ab6780cd SM |
971 | |
972 | #ifdef DOUG_LEA_MALLOC | |
973 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed | |
974 | because mapped region contents are not preserved in | |
975 | a dumped Emacs. */ | |
976 | mallopt (M_MMAP_MAX, 0); | |
977 | #endif | |
978 | ||
349a4500 | 979 | #ifdef USE_POSIX_MEMALIGN |
19bcad1f SM |
980 | { |
981 | int err = posix_memalign (&base, BLOCK_ALIGN, ABLOCKS_BYTES); | |
ab349c19 RS |
982 | if (err) |
983 | base = NULL; | |
984 | abase = base; | |
19bcad1f SM |
985 | } |
986 | #else | |
ab6780cd SM |
987 | base = malloc (ABLOCKS_BYTES); |
988 | abase = ALIGN (base, BLOCK_ALIGN); | |
ab349c19 RS |
989 | #endif |
990 | ||
6b61353c KH |
991 | if (base == 0) |
992 | { | |
dafc79fa | 993 | MALLOC_UNBLOCK_INPUT; |
6b61353c KH |
994 | memory_full (); |
995 | } | |
ab6780cd SM |
996 | |
997 | aligned = (base == abase); | |
998 | if (!aligned) | |
999 | ((void**)abase)[-1] = base; | |
1000 | ||
1001 | #ifdef DOUG_LEA_MALLOC | |
1002 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
1003 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
1004 | #endif | |
1005 | ||
6b61353c | 1006 | #ifndef USE_LSB_TAG |
8f924df7 KH |
1007 | /* If the memory just allocated cannot be addressed thru a Lisp |
1008 | object's pointer, and it needs to be, that's equivalent to | |
1009 | running out of memory. */ | |
1010 | if (type != MEM_TYPE_NON_LISP) | |
1011 | { | |
1012 | Lisp_Object tem; | |
1013 | char *end = (char *) base + ABLOCKS_BYTES - 1; | |
1014 | XSETCONS (tem, end); | |
1015 | if ((char *) XCONS (tem) != end) | |
1016 | { | |
1017 | lisp_malloc_loser = base; | |
1018 | free (base); | |
dafc79fa | 1019 | MALLOC_UNBLOCK_INPUT; |
8f924df7 KH |
1020 | memory_full (); |
1021 | } | |
1022 | } | |
6b61353c | 1023 | #endif |
8f924df7 | 1024 | |
ab6780cd SM |
1025 | /* Initialize the blocks and put them on the free list. |
1026 | Is `base' was not properly aligned, we can't use the last block. */ | |
1027 | for (i = 0; i < (aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1); i++) | |
1028 | { | |
1029 | abase->blocks[i].abase = abase; | |
1030 | abase->blocks[i].x.next_free = free_ablock; | |
1031 | free_ablock = &abase->blocks[i]; | |
1032 | } | |
005ca5c7 | 1033 | ABLOCKS_BUSY (abase) = (struct ablocks *) (long) aligned; |
ab6780cd | 1034 | |
19bcad1f | 1035 | eassert (0 == ((EMACS_UINT)abase) % BLOCK_ALIGN); |
ab6780cd SM |
1036 | eassert (ABLOCK_ABASE (&abase->blocks[3]) == abase); /* 3 is arbitrary */ |
1037 | eassert (ABLOCK_ABASE (&abase->blocks[0]) == abase); | |
1038 | eassert (ABLOCKS_BASE (abase) == base); | |
005ca5c7 | 1039 | eassert (aligned == (long) ABLOCKS_BUSY (abase)); |
ab6780cd SM |
1040 | } |
1041 | ||
1042 | abase = ABLOCK_ABASE (free_ablock); | |
005ca5c7 | 1043 | ABLOCKS_BUSY (abase) = (struct ablocks *) (2 + (long) ABLOCKS_BUSY (abase)); |
ab6780cd SM |
1044 | val = free_ablock; |
1045 | free_ablock = free_ablock->x.next_free; | |
1046 | ||
ab6780cd SM |
1047 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
1048 | if (val && type != MEM_TYPE_NON_LISP) | |
1049 | mem_insert (val, (char *) val + nbytes, type); | |
1050 | #endif | |
1051 | ||
dafc79fa | 1052 | MALLOC_UNBLOCK_INPUT; |
ab6780cd SM |
1053 | if (!val && nbytes) |
1054 | memory_full (); | |
1055 | ||
1056 | eassert (0 == ((EMACS_UINT)val) % BLOCK_ALIGN); | |
1057 | return val; | |
1058 | } | |
1059 | ||
1060 | static void | |
971de7fb | 1061 | lisp_align_free (POINTER_TYPE *block) |
ab6780cd SM |
1062 | { |
1063 | struct ablock *ablock = block; | |
1064 | struct ablocks *abase = ABLOCK_ABASE (ablock); | |
1065 | ||
dafc79fa | 1066 | MALLOC_BLOCK_INPUT; |
ab6780cd SM |
1067 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
1068 | mem_delete (mem_find (block)); | |
1069 | #endif | |
1070 | /* Put on free list. */ | |
1071 | ablock->x.next_free = free_ablock; | |
1072 | free_ablock = ablock; | |
1073 | /* Update busy count. */ | |
005ca5c7 | 1074 | ABLOCKS_BUSY (abase) = (struct ablocks *) (-2 + (long) ABLOCKS_BUSY (abase)); |
d2db1c32 | 1075 | |
005ca5c7 | 1076 | if (2 > (long) ABLOCKS_BUSY (abase)) |
ab6780cd | 1077 | { /* All the blocks are free. */ |
005ca5c7 | 1078 | int i = 0, aligned = (long) ABLOCKS_BUSY (abase); |
ab6780cd SM |
1079 | struct ablock **tem = &free_ablock; |
1080 | struct ablock *atop = &abase->blocks[aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1]; | |
1081 | ||
1082 | while (*tem) | |
1083 | { | |
1084 | if (*tem >= (struct ablock *) abase && *tem < atop) | |
1085 | { | |
1086 | i++; | |
1087 | *tem = (*tem)->x.next_free; | |
1088 | } | |
1089 | else | |
1090 | tem = &(*tem)->x.next_free; | |
1091 | } | |
1092 | eassert ((aligned & 1) == aligned); | |
1093 | eassert (i == (aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1)); | |
349a4500 | 1094 | #ifdef USE_POSIX_MEMALIGN |
cfb2f32e SM |
1095 | eassert ((unsigned long)ABLOCKS_BASE (abase) % BLOCK_ALIGN == 0); |
1096 | #endif | |
ab6780cd SM |
1097 | free (ABLOCKS_BASE (abase)); |
1098 | } | |
dafc79fa | 1099 | MALLOC_UNBLOCK_INPUT; |
ab6780cd | 1100 | } |
3ef06d12 SM |
1101 | |
1102 | /* Return a new buffer structure allocated from the heap with | |
1103 | a call to lisp_malloc. */ | |
1104 | ||
1105 | struct buffer * | |
971de7fb | 1106 | allocate_buffer (void) |
3ef06d12 SM |
1107 | { |
1108 | struct buffer *b | |
1109 | = (struct buffer *) lisp_malloc (sizeof (struct buffer), | |
1110 | MEM_TYPE_BUFFER); | |
67ee9f6e SM |
1111 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
1112 | XSETPVECTYPE (b, PVEC_BUFFER); | |
3ef06d12 SM |
1113 | return b; |
1114 | } | |
1115 | ||
9ac0d9e0 | 1116 | \f |
026cdede SM |
1117 | #ifndef SYSTEM_MALLOC |
1118 | ||
9ac0d9e0 JB |
1119 | /* Arranging to disable input signals while we're in malloc. |
1120 | ||
1121 | This only works with GNU malloc. To help out systems which can't | |
1122 | use GNU malloc, all the calls to malloc, realloc, and free | |
1123 | elsewhere in the code should be inside a BLOCK_INPUT/UNBLOCK_INPUT | |
026cdede | 1124 | pair; unfortunately, we have no idea what C library functions |
9ac0d9e0 | 1125 | might call malloc, so we can't really protect them unless you're |
2c5bd608 DL |
1126 | using GNU malloc. Fortunately, most of the major operating systems |
1127 | can use GNU malloc. */ | |
9ac0d9e0 | 1128 | |
026cdede | 1129 | #ifndef SYNC_INPUT |
dafc79fa SM |
1130 | /* When using SYNC_INPUT, we don't call malloc from a signal handler, so |
1131 | there's no need to block input around malloc. */ | |
026cdede | 1132 | |
b3303f74 | 1133 | #ifndef DOUG_LEA_MALLOC |
f57e2426 J |
1134 | extern void * (*__malloc_hook) (size_t, const void *); |
1135 | extern void * (*__realloc_hook) (void *, size_t, const void *); | |
1136 | extern void (*__free_hook) (void *, const void *); | |
b3303f74 DL |
1137 | /* Else declared in malloc.h, perhaps with an extra arg. */ |
1138 | #endif /* DOUG_LEA_MALLOC */ | |
f57e2426 J |
1139 | static void * (*old_malloc_hook) (size_t, const void *); |
1140 | static void * (*old_realloc_hook) (void *, size_t, const void*); | |
1141 | static void (*old_free_hook) (void*, const void*); | |
9ac0d9e0 | 1142 | |
276cbe5a RS |
1143 | /* This function is used as the hook for free to call. */ |
1144 | ||
9ac0d9e0 | 1145 | static void |
7c3320d8 | 1146 | emacs_blocked_free (void *ptr, const void *ptr2) |
9ac0d9e0 | 1147 | { |
aa477689 | 1148 | BLOCK_INPUT_ALLOC; |
877935b1 GM |
1149 | |
1150 | #ifdef GC_MALLOC_CHECK | |
a83fee2c GM |
1151 | if (ptr) |
1152 | { | |
1153 | struct mem_node *m; | |
177c0ea7 | 1154 | |
a83fee2c GM |
1155 | m = mem_find (ptr); |
1156 | if (m == MEM_NIL || m->start != ptr) | |
1157 | { | |
1158 | fprintf (stderr, | |
1159 | "Freeing `%p' which wasn't allocated with malloc\n", ptr); | |
1160 | abort (); | |
1161 | } | |
1162 | else | |
1163 | { | |
1164 | /* fprintf (stderr, "free %p...%p (%p)\n", m->start, m->end, ptr); */ | |
1165 | mem_delete (m); | |
1166 | } | |
1167 | } | |
877935b1 | 1168 | #endif /* GC_MALLOC_CHECK */ |
177c0ea7 | 1169 | |
9ac0d9e0 JB |
1170 | __free_hook = old_free_hook; |
1171 | free (ptr); | |
177c0ea7 | 1172 | |
276cbe5a RS |
1173 | /* If we released our reserve (due to running out of memory), |
1174 | and we have a fair amount free once again, | |
1175 | try to set aside another reserve in case we run out once more. */ | |
24d8a105 | 1176 | if (! NILP (Vmemory_full) |
276cbe5a RS |
1177 | /* Verify there is enough space that even with the malloc |
1178 | hysteresis this call won't run out again. | |
1179 | The code here is correct as long as SPARE_MEMORY | |
1180 | is substantially larger than the block size malloc uses. */ | |
1181 | && (bytes_used_when_full | |
4d74a5fc | 1182 | > ((bytes_used_when_reconsidered = BYTES_USED) |
bccfb310 | 1183 | + max (malloc_hysteresis, 4) * SPARE_MEMORY))) |
24d8a105 | 1184 | refill_memory_reserve (); |
276cbe5a | 1185 | |
b0846f52 | 1186 | __free_hook = emacs_blocked_free; |
aa477689 | 1187 | UNBLOCK_INPUT_ALLOC; |
9ac0d9e0 JB |
1188 | } |
1189 | ||
34400008 | 1190 | |
276cbe5a RS |
1191 | /* This function is the malloc hook that Emacs uses. */ |
1192 | ||
9ac0d9e0 | 1193 | static void * |
7c3320d8 | 1194 | emacs_blocked_malloc (size_t size, const void *ptr) |
9ac0d9e0 JB |
1195 | { |
1196 | void *value; | |
1197 | ||
aa477689 | 1198 | BLOCK_INPUT_ALLOC; |
9ac0d9e0 | 1199 | __malloc_hook = old_malloc_hook; |
1177ecf6 | 1200 | #ifdef DOUG_LEA_MALLOC |
5665a02f KL |
1201 | /* Segfaults on my system. --lorentey */ |
1202 | /* mallopt (M_TOP_PAD, malloc_hysteresis * 4096); */ | |
1177ecf6 | 1203 | #else |
d1658221 | 1204 | __malloc_extra_blocks = malloc_hysteresis; |
1177ecf6 | 1205 | #endif |
877935b1 | 1206 | |
2756d8ee | 1207 | value = (void *) malloc (size); |
877935b1 GM |
1208 | |
1209 | #ifdef GC_MALLOC_CHECK | |
1210 | { | |
1211 | struct mem_node *m = mem_find (value); | |
1212 | if (m != MEM_NIL) | |
1213 | { | |
1214 | fprintf (stderr, "Malloc returned %p which is already in use\n", | |
1215 | value); | |
1216 | fprintf (stderr, "Region in use is %p...%p, %u bytes, type %d\n", | |
1217 | m->start, m->end, (char *) m->end - (char *) m->start, | |
1218 | m->type); | |
1219 | abort (); | |
1220 | } | |
1221 | ||
1222 | if (!dont_register_blocks) | |
1223 | { | |
1224 | mem_insert (value, (char *) value + max (1, size), allocated_mem_type); | |
1225 | allocated_mem_type = MEM_TYPE_NON_LISP; | |
1226 | } | |
1227 | } | |
1228 | #endif /* GC_MALLOC_CHECK */ | |
177c0ea7 | 1229 | |
b0846f52 | 1230 | __malloc_hook = emacs_blocked_malloc; |
aa477689 | 1231 | UNBLOCK_INPUT_ALLOC; |
9ac0d9e0 | 1232 | |
877935b1 | 1233 | /* fprintf (stderr, "%p malloc\n", value); */ |
9ac0d9e0 JB |
1234 | return value; |
1235 | } | |
1236 | ||
34400008 GM |
1237 | |
1238 | /* This function is the realloc hook that Emacs uses. */ | |
1239 | ||
9ac0d9e0 | 1240 | static void * |
7c3320d8 | 1241 | emacs_blocked_realloc (void *ptr, size_t size, const void *ptr2) |
9ac0d9e0 JB |
1242 | { |
1243 | void *value; | |
1244 | ||
aa477689 | 1245 | BLOCK_INPUT_ALLOC; |
9ac0d9e0 | 1246 | __realloc_hook = old_realloc_hook; |
877935b1 GM |
1247 | |
1248 | #ifdef GC_MALLOC_CHECK | |
1249 | if (ptr) | |
1250 | { | |
1251 | struct mem_node *m = mem_find (ptr); | |
1252 | if (m == MEM_NIL || m->start != ptr) | |
1253 | { | |
1254 | fprintf (stderr, | |
1255 | "Realloc of %p which wasn't allocated with malloc\n", | |
1256 | ptr); | |
1257 | abort (); | |
1258 | } | |
1259 | ||
1260 | mem_delete (m); | |
1261 | } | |
177c0ea7 | 1262 | |
877935b1 | 1263 | /* fprintf (stderr, "%p -> realloc\n", ptr); */ |
177c0ea7 | 1264 | |
877935b1 GM |
1265 | /* Prevent malloc from registering blocks. */ |
1266 | dont_register_blocks = 1; | |
1267 | #endif /* GC_MALLOC_CHECK */ | |
1268 | ||
2756d8ee | 1269 | value = (void *) realloc (ptr, size); |
877935b1 GM |
1270 | |
1271 | #ifdef GC_MALLOC_CHECK | |
1272 | dont_register_blocks = 0; | |
1273 | ||
1274 | { | |
1275 | struct mem_node *m = mem_find (value); | |
1276 | if (m != MEM_NIL) | |
1277 | { | |
1278 | fprintf (stderr, "Realloc returns memory that is already in use\n"); | |
1279 | abort (); | |
1280 | } | |
1281 | ||
1282 | /* Can't handle zero size regions in the red-black tree. */ | |
1283 | mem_insert (value, (char *) value + max (size, 1), MEM_TYPE_NON_LISP); | |
1284 | } | |
177c0ea7 | 1285 | |
877935b1 GM |
1286 | /* fprintf (stderr, "%p <- realloc\n", value); */ |
1287 | #endif /* GC_MALLOC_CHECK */ | |
177c0ea7 | 1288 | |
b0846f52 | 1289 | __realloc_hook = emacs_blocked_realloc; |
aa477689 | 1290 | UNBLOCK_INPUT_ALLOC; |
9ac0d9e0 JB |
1291 | |
1292 | return value; | |
1293 | } | |
1294 | ||
34400008 | 1295 | |
aa477689 JD |
1296 | #ifdef HAVE_GTK_AND_PTHREAD |
1297 | /* Called from Fdump_emacs so that when the dumped Emacs starts, it has a | |
1298 | normal malloc. Some thread implementations need this as they call | |
1299 | malloc before main. The pthread_self call in BLOCK_INPUT_ALLOC then | |
1300 | calls malloc because it is the first call, and we have an endless loop. */ | |
1301 | ||
1302 | void | |
1303 | reset_malloc_hooks () | |
1304 | { | |
4d580af2 AS |
1305 | __free_hook = old_free_hook; |
1306 | __malloc_hook = old_malloc_hook; | |
1307 | __realloc_hook = old_realloc_hook; | |
aa477689 JD |
1308 | } |
1309 | #endif /* HAVE_GTK_AND_PTHREAD */ | |
1310 | ||
1311 | ||
34400008 GM |
1312 | /* Called from main to set up malloc to use our hooks. */ |
1313 | ||
9ac0d9e0 | 1314 | void |
7c3320d8 | 1315 | uninterrupt_malloc (void) |
9ac0d9e0 | 1316 | { |
aa477689 | 1317 | #ifdef HAVE_GTK_AND_PTHREAD |
a1b41389 | 1318 | #ifdef DOUG_LEA_MALLOC |
aa477689 JD |
1319 | pthread_mutexattr_t attr; |
1320 | ||
1321 | /* GLIBC has a faster way to do this, but lets keep it portable. | |
1322 | This is according to the Single UNIX Specification. */ | |
1323 | pthread_mutexattr_init (&attr); | |
1324 | pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE); | |
1325 | pthread_mutex_init (&alloc_mutex, &attr); | |
a1b41389 | 1326 | #else /* !DOUG_LEA_MALLOC */ |
ce5b453a | 1327 | /* Some systems such as Solaris 2.6 don't have a recursive mutex, |
a1b41389 YM |
1328 | and the bundled gmalloc.c doesn't require it. */ |
1329 | pthread_mutex_init (&alloc_mutex, NULL); | |
1330 | #endif /* !DOUG_LEA_MALLOC */ | |
aa477689 JD |
1331 | #endif /* HAVE_GTK_AND_PTHREAD */ |
1332 | ||
c8099634 RS |
1333 | if (__free_hook != emacs_blocked_free) |
1334 | old_free_hook = __free_hook; | |
b0846f52 | 1335 | __free_hook = emacs_blocked_free; |
9ac0d9e0 | 1336 | |
c8099634 RS |
1337 | if (__malloc_hook != emacs_blocked_malloc) |
1338 | old_malloc_hook = __malloc_hook; | |
b0846f52 | 1339 | __malloc_hook = emacs_blocked_malloc; |
9ac0d9e0 | 1340 | |
c8099634 RS |
1341 | if (__realloc_hook != emacs_blocked_realloc) |
1342 | old_realloc_hook = __realloc_hook; | |
b0846f52 | 1343 | __realloc_hook = emacs_blocked_realloc; |
9ac0d9e0 | 1344 | } |
2e471eb5 | 1345 | |
026cdede | 1346 | #endif /* not SYNC_INPUT */ |
2e471eb5 GM |
1347 | #endif /* not SYSTEM_MALLOC */ |
1348 | ||
1349 | ||
7146af97 | 1350 | \f |
2e471eb5 GM |
1351 | /*********************************************************************** |
1352 | Interval Allocation | |
1353 | ***********************************************************************/ | |
1a4f1e2c | 1354 | |
34400008 GM |
1355 | /* Number of intervals allocated in an interval_block structure. |
1356 | The 1020 is 1024 minus malloc overhead. */ | |
1357 | ||
d5e35230 JA |
1358 | #define INTERVAL_BLOCK_SIZE \ |
1359 | ((1020 - sizeof (struct interval_block *)) / sizeof (struct interval)) | |
1360 | ||
34400008 GM |
1361 | /* Intervals are allocated in chunks in form of an interval_block |
1362 | structure. */ | |
1363 | ||
d5e35230 | 1364 | struct interval_block |
2e471eb5 | 1365 | { |
6b61353c | 1366 | /* Place `intervals' first, to preserve alignment. */ |
2e471eb5 | 1367 | struct interval intervals[INTERVAL_BLOCK_SIZE]; |
6b61353c | 1368 | struct interval_block *next; |
2e471eb5 | 1369 | }; |
d5e35230 | 1370 | |
34400008 GM |
1371 | /* Current interval block. Its `next' pointer points to older |
1372 | blocks. */ | |
1373 | ||
d3d47262 | 1374 | static struct interval_block *interval_block; |
34400008 GM |
1375 | |
1376 | /* Index in interval_block above of the next unused interval | |
1377 | structure. */ | |
1378 | ||
d5e35230 | 1379 | static int interval_block_index; |
34400008 GM |
1380 | |
1381 | /* Number of free and live intervals. */ | |
1382 | ||
2e471eb5 | 1383 | static int total_free_intervals, total_intervals; |
d5e35230 | 1384 | |
34400008 GM |
1385 | /* List of free intervals. */ |
1386 | ||
d5e35230 JA |
1387 | INTERVAL interval_free_list; |
1388 | ||
c8099634 | 1389 | /* Total number of interval blocks now in use. */ |
2e471eb5 | 1390 | |
d3d47262 | 1391 | static int n_interval_blocks; |
c8099634 | 1392 | |
34400008 GM |
1393 | |
1394 | /* Initialize interval allocation. */ | |
1395 | ||
d5e35230 | 1396 | static void |
971de7fb | 1397 | init_intervals (void) |
d5e35230 | 1398 | { |
005ca5c7 DL |
1399 | interval_block = NULL; |
1400 | interval_block_index = INTERVAL_BLOCK_SIZE; | |
d5e35230 | 1401 | interval_free_list = 0; |
005ca5c7 | 1402 | n_interval_blocks = 0; |
d5e35230 JA |
1403 | } |
1404 | ||
34400008 GM |
1405 | |
1406 | /* Return a new interval. */ | |
d5e35230 JA |
1407 | |
1408 | INTERVAL | |
971de7fb | 1409 | make_interval (void) |
d5e35230 JA |
1410 | { |
1411 | INTERVAL val; | |
1412 | ||
e2984df0 CY |
1413 | /* eassert (!handling_signal); */ |
1414 | ||
dafc79fa | 1415 | MALLOC_BLOCK_INPUT; |
cfb2f32e | 1416 | |
d5e35230 JA |
1417 | if (interval_free_list) |
1418 | { | |
1419 | val = interval_free_list; | |
439d5cb4 | 1420 | interval_free_list = INTERVAL_PARENT (interval_free_list); |
d5e35230 JA |
1421 | } |
1422 | else | |
1423 | { | |
1424 | if (interval_block_index == INTERVAL_BLOCK_SIZE) | |
1425 | { | |
3c06d205 KH |
1426 | register struct interval_block *newi; |
1427 | ||
34400008 GM |
1428 | newi = (struct interval_block *) lisp_malloc (sizeof *newi, |
1429 | MEM_TYPE_NON_LISP); | |
d5e35230 | 1430 | |
d5e35230 JA |
1431 | newi->next = interval_block; |
1432 | interval_block = newi; | |
1433 | interval_block_index = 0; | |
c8099634 | 1434 | n_interval_blocks++; |
d5e35230 JA |
1435 | } |
1436 | val = &interval_block->intervals[interval_block_index++]; | |
1437 | } | |
e2984df0 | 1438 | |
dafc79fa | 1439 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 1440 | |
d5e35230 | 1441 | consing_since_gc += sizeof (struct interval); |
310ea200 | 1442 | intervals_consed++; |
d5e35230 | 1443 | RESET_INTERVAL (val); |
2336fe58 | 1444 | val->gcmarkbit = 0; |
d5e35230 JA |
1445 | return val; |
1446 | } | |
1447 | ||
34400008 GM |
1448 | |
1449 | /* Mark Lisp objects in interval I. */ | |
d5e35230 JA |
1450 | |
1451 | static void | |
971de7fb | 1452 | mark_interval (register INTERVAL i, Lisp_Object dummy) |
d5e35230 | 1453 | { |
2336fe58 SM |
1454 | eassert (!i->gcmarkbit); /* Intervals are never shared. */ |
1455 | i->gcmarkbit = 1; | |
49723c04 | 1456 | mark_object (i->plist); |
d5e35230 JA |
1457 | } |
1458 | ||
34400008 GM |
1459 | |
1460 | /* Mark the interval tree rooted in TREE. Don't call this directly; | |
1461 | use the macro MARK_INTERVAL_TREE instead. */ | |
1462 | ||
d5e35230 | 1463 | static void |
971de7fb | 1464 | mark_interval_tree (register INTERVAL tree) |
d5e35230 | 1465 | { |
e8720644 JB |
1466 | /* No need to test if this tree has been marked already; this |
1467 | function is always called through the MARK_INTERVAL_TREE macro, | |
1468 | which takes care of that. */ | |
1469 | ||
1e934989 | 1470 | traverse_intervals_noorder (tree, mark_interval, Qnil); |
d5e35230 JA |
1471 | } |
1472 | ||
34400008 GM |
1473 | |
1474 | /* Mark the interval tree rooted in I. */ | |
1475 | ||
e8720644 JB |
1476 | #define MARK_INTERVAL_TREE(i) \ |
1477 | do { \ | |
2336fe58 | 1478 | if (!NULL_INTERVAL_P (i) && !i->gcmarkbit) \ |
e8720644 JB |
1479 | mark_interval_tree (i); \ |
1480 | } while (0) | |
d5e35230 | 1481 | |
34400008 | 1482 | |
2e471eb5 GM |
1483 | #define UNMARK_BALANCE_INTERVALS(i) \ |
1484 | do { \ | |
1485 | if (! NULL_INTERVAL_P (i)) \ | |
2336fe58 | 1486 | (i) = balance_intervals (i); \ |
2e471eb5 | 1487 | } while (0) |
d5e35230 | 1488 | |
cc2d8c6b | 1489 | \f |
6e5cb96f | 1490 | /* Number support. If USE_LISP_UNION_TYPE is in effect, we |
cc2d8c6b KR |
1491 | can't create number objects in macros. */ |
1492 | #ifndef make_number | |
1493 | Lisp_Object | |
c566235d | 1494 | make_number (EMACS_INT n) |
cc2d8c6b KR |
1495 | { |
1496 | Lisp_Object obj; | |
1497 | obj.s.val = n; | |
1498 | obj.s.type = Lisp_Int; | |
1499 | return obj; | |
1500 | } | |
1501 | #endif | |
d5e35230 | 1502 | \f |
2e471eb5 GM |
1503 | /*********************************************************************** |
1504 | String Allocation | |
1505 | ***********************************************************************/ | |
1a4f1e2c | 1506 | |
2e471eb5 GM |
1507 | /* Lisp_Strings are allocated in string_block structures. When a new |
1508 | string_block is allocated, all the Lisp_Strings it contains are | |
e0fead5d | 1509 | added to a free-list string_free_list. When a new Lisp_String is |
2e471eb5 GM |
1510 | needed, it is taken from that list. During the sweep phase of GC, |
1511 | string_blocks that are entirely free are freed, except two which | |
1512 | we keep. | |
7146af97 | 1513 | |
2e471eb5 GM |
1514 | String data is allocated from sblock structures. Strings larger |
1515 | than LARGE_STRING_BYTES, get their own sblock, data for smaller | |
1516 | strings is sub-allocated out of sblocks of size SBLOCK_SIZE. | |
7146af97 | 1517 | |
2e471eb5 GM |
1518 | Sblocks consist internally of sdata structures, one for each |
1519 | Lisp_String. The sdata structure points to the Lisp_String it | |
1520 | belongs to. The Lisp_String points back to the `u.data' member of | |
1521 | its sdata structure. | |
7146af97 | 1522 | |
2e471eb5 GM |
1523 | When a Lisp_String is freed during GC, it is put back on |
1524 | string_free_list, and its `data' member and its sdata's `string' | |
1525 | pointer is set to null. The size of the string is recorded in the | |
1526 | `u.nbytes' member of the sdata. So, sdata structures that are no | |
1527 | longer used, can be easily recognized, and it's easy to compact the | |
1528 | sblocks of small strings which we do in compact_small_strings. */ | |
7146af97 | 1529 | |
2e471eb5 GM |
1530 | /* Size in bytes of an sblock structure used for small strings. This |
1531 | is 8192 minus malloc overhead. */ | |
7146af97 | 1532 | |
2e471eb5 | 1533 | #define SBLOCK_SIZE 8188 |
c8099634 | 1534 | |
2e471eb5 GM |
1535 | /* Strings larger than this are considered large strings. String data |
1536 | for large strings is allocated from individual sblocks. */ | |
7146af97 | 1537 | |
2e471eb5 GM |
1538 | #define LARGE_STRING_BYTES 1024 |
1539 | ||
1540 | /* Structure describing string memory sub-allocated from an sblock. | |
1541 | This is where the contents of Lisp strings are stored. */ | |
1542 | ||
1543 | struct sdata | |
7146af97 | 1544 | { |
2e471eb5 GM |
1545 | /* Back-pointer to the string this sdata belongs to. If null, this |
1546 | structure is free, and the NBYTES member of the union below | |
34400008 | 1547 | contains the string's byte size (the same value that STRING_BYTES |
2e471eb5 GM |
1548 | would return if STRING were non-null). If non-null, STRING_BYTES |
1549 | (STRING) is the size of the data, and DATA contains the string's | |
1550 | contents. */ | |
1551 | struct Lisp_String *string; | |
7146af97 | 1552 | |
31d929e5 | 1553 | #ifdef GC_CHECK_STRING_BYTES |
177c0ea7 | 1554 | |
31d929e5 GM |
1555 | EMACS_INT nbytes; |
1556 | unsigned char data[1]; | |
177c0ea7 | 1557 | |
31d929e5 GM |
1558 | #define SDATA_NBYTES(S) (S)->nbytes |
1559 | #define SDATA_DATA(S) (S)->data | |
177c0ea7 | 1560 | |
31d929e5 GM |
1561 | #else /* not GC_CHECK_STRING_BYTES */ |
1562 | ||
2e471eb5 GM |
1563 | union |
1564 | { | |
1565 | /* When STRING in non-null. */ | |
1566 | unsigned char data[1]; | |
1567 | ||
1568 | /* When STRING is null. */ | |
1569 | EMACS_INT nbytes; | |
1570 | } u; | |
177c0ea7 | 1571 | |
31d929e5 GM |
1572 | |
1573 | #define SDATA_NBYTES(S) (S)->u.nbytes | |
1574 | #define SDATA_DATA(S) (S)->u.data | |
1575 | ||
1576 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 GM |
1577 | }; |
1578 | ||
31d929e5 | 1579 | |
2e471eb5 GM |
1580 | /* Structure describing a block of memory which is sub-allocated to |
1581 | obtain string data memory for strings. Blocks for small strings | |
1582 | are of fixed size SBLOCK_SIZE. Blocks for large strings are made | |
1583 | as large as needed. */ | |
1584 | ||
1585 | struct sblock | |
7146af97 | 1586 | { |
2e471eb5 GM |
1587 | /* Next in list. */ |
1588 | struct sblock *next; | |
7146af97 | 1589 | |
2e471eb5 GM |
1590 | /* Pointer to the next free sdata block. This points past the end |
1591 | of the sblock if there isn't any space left in this block. */ | |
1592 | struct sdata *next_free; | |
1593 | ||
1594 | /* Start of data. */ | |
1595 | struct sdata first_data; | |
1596 | }; | |
1597 | ||
1598 | /* Number of Lisp strings in a string_block structure. The 1020 is | |
1599 | 1024 minus malloc overhead. */ | |
1600 | ||
19bcad1f | 1601 | #define STRING_BLOCK_SIZE \ |
2e471eb5 GM |
1602 | ((1020 - sizeof (struct string_block *)) / sizeof (struct Lisp_String)) |
1603 | ||
1604 | /* Structure describing a block from which Lisp_String structures | |
1605 | are allocated. */ | |
1606 | ||
1607 | struct string_block | |
7146af97 | 1608 | { |
6b61353c | 1609 | /* Place `strings' first, to preserve alignment. */ |
19bcad1f | 1610 | struct Lisp_String strings[STRING_BLOCK_SIZE]; |
6b61353c | 1611 | struct string_block *next; |
2e471eb5 | 1612 | }; |
7146af97 | 1613 | |
2e471eb5 GM |
1614 | /* Head and tail of the list of sblock structures holding Lisp string |
1615 | data. We always allocate from current_sblock. The NEXT pointers | |
1616 | in the sblock structures go from oldest_sblock to current_sblock. */ | |
3c06d205 | 1617 | |
2e471eb5 | 1618 | static struct sblock *oldest_sblock, *current_sblock; |
7146af97 | 1619 | |
2e471eb5 | 1620 | /* List of sblocks for large strings. */ |
7146af97 | 1621 | |
2e471eb5 | 1622 | static struct sblock *large_sblocks; |
7146af97 | 1623 | |
2e471eb5 | 1624 | /* List of string_block structures, and how many there are. */ |
7146af97 | 1625 | |
2e471eb5 GM |
1626 | static struct string_block *string_blocks; |
1627 | static int n_string_blocks; | |
7146af97 | 1628 | |
2e471eb5 | 1629 | /* Free-list of Lisp_Strings. */ |
7146af97 | 1630 | |
2e471eb5 | 1631 | static struct Lisp_String *string_free_list; |
7146af97 | 1632 | |
2e471eb5 | 1633 | /* Number of live and free Lisp_Strings. */ |
c8099634 | 1634 | |
2e471eb5 | 1635 | static int total_strings, total_free_strings; |
7146af97 | 1636 | |
2e471eb5 GM |
1637 | /* Number of bytes used by live strings. */ |
1638 | ||
14162469 | 1639 | static EMACS_INT total_string_size; |
2e471eb5 GM |
1640 | |
1641 | /* Given a pointer to a Lisp_String S which is on the free-list | |
1642 | string_free_list, return a pointer to its successor in the | |
1643 | free-list. */ | |
1644 | ||
1645 | #define NEXT_FREE_LISP_STRING(S) (*(struct Lisp_String **) (S)) | |
1646 | ||
1647 | /* Return a pointer to the sdata structure belonging to Lisp string S. | |
1648 | S must be live, i.e. S->data must not be null. S->data is actually | |
1649 | a pointer to the `u.data' member of its sdata structure; the | |
1650 | structure starts at a constant offset in front of that. */ | |
177c0ea7 | 1651 | |
31d929e5 GM |
1652 | #ifdef GC_CHECK_STRING_BYTES |
1653 | ||
1654 | #define SDATA_OF_STRING(S) \ | |
1655 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *) \ | |
1656 | - sizeof (EMACS_INT))) | |
1657 | ||
1658 | #else /* not GC_CHECK_STRING_BYTES */ | |
1659 | ||
2e471eb5 GM |
1660 | #define SDATA_OF_STRING(S) \ |
1661 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *))) | |
1662 | ||
31d929e5 GM |
1663 | #endif /* not GC_CHECK_STRING_BYTES */ |
1664 | ||
212f33f1 KS |
1665 | |
1666 | #ifdef GC_CHECK_STRING_OVERRUN | |
bdbed949 KS |
1667 | |
1668 | /* We check for overrun in string data blocks by appending a small | |
1669 | "cookie" after each allocated string data block, and check for the | |
8349069c | 1670 | presence of this cookie during GC. */ |
bdbed949 KS |
1671 | |
1672 | #define GC_STRING_OVERRUN_COOKIE_SIZE 4 | |
1673 | static char string_overrun_cookie[GC_STRING_OVERRUN_COOKIE_SIZE] = | |
1674 | { 0xde, 0xad, 0xbe, 0xef }; | |
1675 | ||
212f33f1 | 1676 | #else |
bdbed949 | 1677 | #define GC_STRING_OVERRUN_COOKIE_SIZE 0 |
212f33f1 KS |
1678 | #endif |
1679 | ||
2e471eb5 GM |
1680 | /* Value is the size of an sdata structure large enough to hold NBYTES |
1681 | bytes of string data. The value returned includes a terminating | |
1682 | NUL byte, the size of the sdata structure, and padding. */ | |
1683 | ||
31d929e5 GM |
1684 | #ifdef GC_CHECK_STRING_BYTES |
1685 | ||
2e471eb5 GM |
1686 | #define SDATA_SIZE(NBYTES) \ |
1687 | ((sizeof (struct Lisp_String *) \ | |
1688 | + (NBYTES) + 1 \ | |
31d929e5 | 1689 | + sizeof (EMACS_INT) \ |
2e471eb5 GM |
1690 | + sizeof (EMACS_INT) - 1) \ |
1691 | & ~(sizeof (EMACS_INT) - 1)) | |
1692 | ||
31d929e5 GM |
1693 | #else /* not GC_CHECK_STRING_BYTES */ |
1694 | ||
1695 | #define SDATA_SIZE(NBYTES) \ | |
1696 | ((sizeof (struct Lisp_String *) \ | |
1697 | + (NBYTES) + 1 \ | |
1698 | + sizeof (EMACS_INT) - 1) \ | |
1699 | & ~(sizeof (EMACS_INT) - 1)) | |
1700 | ||
1701 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 | 1702 | |
bdbed949 KS |
1703 | /* Extra bytes to allocate for each string. */ |
1704 | ||
1705 | #define GC_STRING_EXTRA (GC_STRING_OVERRUN_COOKIE_SIZE) | |
1706 | ||
2e471eb5 | 1707 | /* Initialize string allocation. Called from init_alloc_once. */ |
d457598b | 1708 | |
d3d47262 | 1709 | static void |
971de7fb | 1710 | init_strings (void) |
7146af97 | 1711 | { |
2e471eb5 GM |
1712 | total_strings = total_free_strings = total_string_size = 0; |
1713 | oldest_sblock = current_sblock = large_sblocks = NULL; | |
1714 | string_blocks = NULL; | |
1715 | n_string_blocks = 0; | |
1716 | string_free_list = NULL; | |
4d774b0f JB |
1717 | empty_unibyte_string = make_pure_string ("", 0, 0, 0); |
1718 | empty_multibyte_string = make_pure_string ("", 0, 0, 1); | |
7146af97 JB |
1719 | } |
1720 | ||
2e471eb5 | 1721 | |
361b097f GM |
1722 | #ifdef GC_CHECK_STRING_BYTES |
1723 | ||
361b097f GM |
1724 | static int check_string_bytes_count; |
1725 | ||
f57e2426 J |
1726 | static void check_string_bytes (int); |
1727 | static void check_sblock (struct sblock *); | |
676a7251 GM |
1728 | |
1729 | #define CHECK_STRING_BYTES(S) STRING_BYTES (S) | |
1730 | ||
1731 | ||
1732 | /* Like GC_STRING_BYTES, but with debugging check. */ | |
1733 | ||
14162469 EZ |
1734 | EMACS_INT |
1735 | string_bytes (struct Lisp_String *s) | |
676a7251 | 1736 | { |
14162469 EZ |
1737 | EMACS_INT nbytes = |
1738 | (s->size_byte < 0 ? s->size & ~ARRAY_MARK_FLAG : s->size_byte); | |
1739 | ||
676a7251 GM |
1740 | if (!PURE_POINTER_P (s) |
1741 | && s->data | |
1742 | && nbytes != SDATA_NBYTES (SDATA_OF_STRING (s))) | |
1743 | abort (); | |
1744 | return nbytes; | |
1745 | } | |
177c0ea7 | 1746 | |
2c5bd608 | 1747 | /* Check validity of Lisp strings' string_bytes member in B. */ |
676a7251 | 1748 | |
d3d47262 | 1749 | static void |
676a7251 GM |
1750 | check_sblock (b) |
1751 | struct sblock *b; | |
361b097f | 1752 | { |
676a7251 | 1753 | struct sdata *from, *end, *from_end; |
177c0ea7 | 1754 | |
676a7251 | 1755 | end = b->next_free; |
177c0ea7 | 1756 | |
676a7251 | 1757 | for (from = &b->first_data; from < end; from = from_end) |
361b097f | 1758 | { |
676a7251 GM |
1759 | /* Compute the next FROM here because copying below may |
1760 | overwrite data we need to compute it. */ | |
14162469 | 1761 | EMACS_INT nbytes; |
177c0ea7 | 1762 | |
676a7251 GM |
1763 | /* Check that the string size recorded in the string is the |
1764 | same as the one recorded in the sdata structure. */ | |
1765 | if (from->string) | |
1766 | CHECK_STRING_BYTES (from->string); | |
177c0ea7 | 1767 | |
676a7251 GM |
1768 | if (from->string) |
1769 | nbytes = GC_STRING_BYTES (from->string); | |
1770 | else | |
1771 | nbytes = SDATA_NBYTES (from); | |
177c0ea7 | 1772 | |
676a7251 | 1773 | nbytes = SDATA_SIZE (nbytes); |
212f33f1 | 1774 | from_end = (struct sdata *) ((char *) from + nbytes + GC_STRING_EXTRA); |
676a7251 GM |
1775 | } |
1776 | } | |
361b097f | 1777 | |
676a7251 GM |
1778 | |
1779 | /* Check validity of Lisp strings' string_bytes member. ALL_P | |
1780 | non-zero means check all strings, otherwise check only most | |
1781 | recently allocated strings. Used for hunting a bug. */ | |
1782 | ||
d3d47262 | 1783 | static void |
676a7251 GM |
1784 | check_string_bytes (all_p) |
1785 | int all_p; | |
1786 | { | |
1787 | if (all_p) | |
1788 | { | |
1789 | struct sblock *b; | |
1790 | ||
1791 | for (b = large_sblocks; b; b = b->next) | |
1792 | { | |
1793 | struct Lisp_String *s = b->first_data.string; | |
1794 | if (s) | |
1795 | CHECK_STRING_BYTES (s); | |
361b097f | 1796 | } |
177c0ea7 | 1797 | |
676a7251 GM |
1798 | for (b = oldest_sblock; b; b = b->next) |
1799 | check_sblock (b); | |
361b097f | 1800 | } |
676a7251 GM |
1801 | else |
1802 | check_sblock (current_sblock); | |
361b097f GM |
1803 | } |
1804 | ||
1805 | #endif /* GC_CHECK_STRING_BYTES */ | |
1806 | ||
212f33f1 KS |
1807 | #ifdef GC_CHECK_STRING_FREE_LIST |
1808 | ||
bdbed949 KS |
1809 | /* Walk through the string free list looking for bogus next pointers. |
1810 | This may catch buffer overrun from a previous string. */ | |
1811 | ||
212f33f1 KS |
1812 | static void |
1813 | check_string_free_list () | |
1814 | { | |
1815 | struct Lisp_String *s; | |
1816 | ||
1817 | /* Pop a Lisp_String off the free-list. */ | |
1818 | s = string_free_list; | |
1819 | while (s != NULL) | |
1820 | { | |
14162469 | 1821 | if ((unsigned long)s < 1024) |
212f33f1 KS |
1822 | abort(); |
1823 | s = NEXT_FREE_LISP_STRING (s); | |
1824 | } | |
1825 | } | |
1826 | #else | |
1827 | #define check_string_free_list() | |
1828 | #endif | |
361b097f | 1829 | |
2e471eb5 GM |
1830 | /* Return a new Lisp_String. */ |
1831 | ||
1832 | static struct Lisp_String * | |
971de7fb | 1833 | allocate_string (void) |
7146af97 | 1834 | { |
2e471eb5 | 1835 | struct Lisp_String *s; |
7146af97 | 1836 | |
e2984df0 CY |
1837 | /* eassert (!handling_signal); */ |
1838 | ||
dafc79fa | 1839 | MALLOC_BLOCK_INPUT; |
cfb2f32e | 1840 | |
2e471eb5 GM |
1841 | /* If the free-list is empty, allocate a new string_block, and |
1842 | add all the Lisp_Strings in it to the free-list. */ | |
1843 | if (string_free_list == NULL) | |
7146af97 | 1844 | { |
2e471eb5 GM |
1845 | struct string_block *b; |
1846 | int i; | |
1847 | ||
34400008 | 1848 | b = (struct string_block *) lisp_malloc (sizeof *b, MEM_TYPE_STRING); |
72af86bd | 1849 | memset (b, 0, sizeof *b); |
2e471eb5 GM |
1850 | b->next = string_blocks; |
1851 | string_blocks = b; | |
1852 | ++n_string_blocks; | |
1853 | ||
19bcad1f | 1854 | for (i = STRING_BLOCK_SIZE - 1; i >= 0; --i) |
7146af97 | 1855 | { |
2e471eb5 GM |
1856 | s = b->strings + i; |
1857 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1858 | string_free_list = s; | |
7146af97 | 1859 | } |
2e471eb5 | 1860 | |
19bcad1f | 1861 | total_free_strings += STRING_BLOCK_SIZE; |
7146af97 | 1862 | } |
c0f51373 | 1863 | |
bdbed949 | 1864 | check_string_free_list (); |
212f33f1 | 1865 | |
2e471eb5 GM |
1866 | /* Pop a Lisp_String off the free-list. */ |
1867 | s = string_free_list; | |
1868 | string_free_list = NEXT_FREE_LISP_STRING (s); | |
c0f51373 | 1869 | |
dafc79fa | 1870 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 1871 | |
2e471eb5 | 1872 | /* Probably not strictly necessary, but play it safe. */ |
72af86bd | 1873 | memset (s, 0, sizeof *s); |
c0f51373 | 1874 | |
2e471eb5 GM |
1875 | --total_free_strings; |
1876 | ++total_strings; | |
1877 | ++strings_consed; | |
1878 | consing_since_gc += sizeof *s; | |
c0f51373 | 1879 | |
361b097f | 1880 | #ifdef GC_CHECK_STRING_BYTES |
e39a993c | 1881 | if (!noninteractive) |
361b097f | 1882 | { |
676a7251 GM |
1883 | if (++check_string_bytes_count == 200) |
1884 | { | |
1885 | check_string_bytes_count = 0; | |
1886 | check_string_bytes (1); | |
1887 | } | |
1888 | else | |
1889 | check_string_bytes (0); | |
361b097f | 1890 | } |
676a7251 | 1891 | #endif /* GC_CHECK_STRING_BYTES */ |
361b097f | 1892 | |
2e471eb5 | 1893 | return s; |
c0f51373 | 1894 | } |
7146af97 | 1895 | |
7146af97 | 1896 | |
2e471eb5 GM |
1897 | /* Set up Lisp_String S for holding NCHARS characters, NBYTES bytes, |
1898 | plus a NUL byte at the end. Allocate an sdata structure for S, and | |
1899 | set S->data to its `u.data' member. Store a NUL byte at the end of | |
1900 | S->data. Set S->size to NCHARS and S->size_byte to NBYTES. Free | |
1901 | S->data if it was initially non-null. */ | |
7146af97 | 1902 | |
2e471eb5 | 1903 | void |
413d18e7 EZ |
1904 | allocate_string_data (struct Lisp_String *s, |
1905 | EMACS_INT nchars, EMACS_INT nbytes) | |
7146af97 | 1906 | { |
5c5fecb3 | 1907 | struct sdata *data, *old_data; |
2e471eb5 | 1908 | struct sblock *b; |
14162469 | 1909 | EMACS_INT needed, old_nbytes; |
7146af97 | 1910 | |
2e471eb5 GM |
1911 | /* Determine the number of bytes needed to store NBYTES bytes |
1912 | of string data. */ | |
1913 | needed = SDATA_SIZE (nbytes); | |
e2984df0 CY |
1914 | old_data = s->data ? SDATA_OF_STRING (s) : NULL; |
1915 | old_nbytes = GC_STRING_BYTES (s); | |
1916 | ||
dafc79fa | 1917 | MALLOC_BLOCK_INPUT; |
7146af97 | 1918 | |
2e471eb5 GM |
1919 | if (nbytes > LARGE_STRING_BYTES) |
1920 | { | |
675d5130 | 1921 | size_t size = sizeof *b - sizeof (struct sdata) + needed; |
2e471eb5 GM |
1922 | |
1923 | #ifdef DOUG_LEA_MALLOC | |
f8608968 GM |
1924 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
1925 | because mapped region contents are not preserved in | |
d36b182f DL |
1926 | a dumped Emacs. |
1927 | ||
1928 | In case you think of allowing it in a dumped Emacs at the | |
1929 | cost of not being able to re-dump, there's another reason: | |
1930 | mmap'ed data typically have an address towards the top of the | |
1931 | address space, which won't fit into an EMACS_INT (at least on | |
1932 | 32-bit systems with the current tagging scheme). --fx */ | |
2e471eb5 GM |
1933 | mallopt (M_MMAP_MAX, 0); |
1934 | #endif | |
1935 | ||
212f33f1 | 1936 | b = (struct sblock *) lisp_malloc (size + GC_STRING_EXTRA, MEM_TYPE_NON_LISP); |
177c0ea7 | 1937 | |
2e471eb5 GM |
1938 | #ifdef DOUG_LEA_MALLOC |
1939 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
1940 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
1941 | #endif | |
177c0ea7 | 1942 | |
2e471eb5 GM |
1943 | b->next_free = &b->first_data; |
1944 | b->first_data.string = NULL; | |
1945 | b->next = large_sblocks; | |
1946 | large_sblocks = b; | |
1947 | } | |
1948 | else if (current_sblock == NULL | |
1949 | || (((char *) current_sblock + SBLOCK_SIZE | |
1950 | - (char *) current_sblock->next_free) | |
212f33f1 | 1951 | < (needed + GC_STRING_EXTRA))) |
2e471eb5 GM |
1952 | { |
1953 | /* Not enough room in the current sblock. */ | |
34400008 | 1954 | b = (struct sblock *) lisp_malloc (SBLOCK_SIZE, MEM_TYPE_NON_LISP); |
2e471eb5 GM |
1955 | b->next_free = &b->first_data; |
1956 | b->first_data.string = NULL; | |
1957 | b->next = NULL; | |
1958 | ||
1959 | if (current_sblock) | |
1960 | current_sblock->next = b; | |
1961 | else | |
1962 | oldest_sblock = b; | |
1963 | current_sblock = b; | |
1964 | } | |
1965 | else | |
1966 | b = current_sblock; | |
5c5fecb3 | 1967 | |
2e471eb5 | 1968 | data = b->next_free; |
a0b08700 CY |
1969 | b->next_free = (struct sdata *) ((char *) data + needed + GC_STRING_EXTRA); |
1970 | ||
dafc79fa | 1971 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 1972 | |
2e471eb5 | 1973 | data->string = s; |
31d929e5 GM |
1974 | s->data = SDATA_DATA (data); |
1975 | #ifdef GC_CHECK_STRING_BYTES | |
1976 | SDATA_NBYTES (data) = nbytes; | |
1977 | #endif | |
2e471eb5 GM |
1978 | s->size = nchars; |
1979 | s->size_byte = nbytes; | |
1980 | s->data[nbytes] = '\0'; | |
212f33f1 | 1981 | #ifdef GC_CHECK_STRING_OVERRUN |
72af86bd | 1982 | memcpy (data + needed, string_overrun_cookie, GC_STRING_OVERRUN_COOKIE_SIZE); |
212f33f1 | 1983 | #endif |
177c0ea7 | 1984 | |
5c5fecb3 GM |
1985 | /* If S had already data assigned, mark that as free by setting its |
1986 | string back-pointer to null, and recording the size of the data | |
00c9c33c | 1987 | in it. */ |
5c5fecb3 GM |
1988 | if (old_data) |
1989 | { | |
31d929e5 | 1990 | SDATA_NBYTES (old_data) = old_nbytes; |
5c5fecb3 GM |
1991 | old_data->string = NULL; |
1992 | } | |
1993 | ||
2e471eb5 GM |
1994 | consing_since_gc += needed; |
1995 | } | |
1996 | ||
1997 | ||
1998 | /* Sweep and compact strings. */ | |
1999 | ||
2000 | static void | |
971de7fb | 2001 | sweep_strings (void) |
2e471eb5 GM |
2002 | { |
2003 | struct string_block *b, *next; | |
2004 | struct string_block *live_blocks = NULL; | |
177c0ea7 | 2005 | |
2e471eb5 GM |
2006 | string_free_list = NULL; |
2007 | total_strings = total_free_strings = 0; | |
2008 | total_string_size = 0; | |
2009 | ||
2010 | /* Scan strings_blocks, free Lisp_Strings that aren't marked. */ | |
2011 | for (b = string_blocks; b; b = next) | |
2012 | { | |
2013 | int i, nfree = 0; | |
2014 | struct Lisp_String *free_list_before = string_free_list; | |
2015 | ||
2016 | next = b->next; | |
2017 | ||
19bcad1f | 2018 | for (i = 0; i < STRING_BLOCK_SIZE; ++i) |
2e471eb5 GM |
2019 | { |
2020 | struct Lisp_String *s = b->strings + i; | |
2021 | ||
2022 | if (s->data) | |
2023 | { | |
2024 | /* String was not on free-list before. */ | |
2025 | if (STRING_MARKED_P (s)) | |
2026 | { | |
2027 | /* String is live; unmark it and its intervals. */ | |
2028 | UNMARK_STRING (s); | |
177c0ea7 | 2029 | |
2e471eb5 GM |
2030 | if (!NULL_INTERVAL_P (s->intervals)) |
2031 | UNMARK_BALANCE_INTERVALS (s->intervals); | |
2032 | ||
2033 | ++total_strings; | |
2034 | total_string_size += STRING_BYTES (s); | |
2035 | } | |
2036 | else | |
2037 | { | |
2038 | /* String is dead. Put it on the free-list. */ | |
2039 | struct sdata *data = SDATA_OF_STRING (s); | |
2040 | ||
2041 | /* Save the size of S in its sdata so that we know | |
2042 | how large that is. Reset the sdata's string | |
2043 | back-pointer so that we know it's free. */ | |
31d929e5 GM |
2044 | #ifdef GC_CHECK_STRING_BYTES |
2045 | if (GC_STRING_BYTES (s) != SDATA_NBYTES (data)) | |
2046 | abort (); | |
2047 | #else | |
2e471eb5 | 2048 | data->u.nbytes = GC_STRING_BYTES (s); |
31d929e5 | 2049 | #endif |
2e471eb5 GM |
2050 | data->string = NULL; |
2051 | ||
2052 | /* Reset the strings's `data' member so that we | |
2053 | know it's free. */ | |
2054 | s->data = NULL; | |
2055 | ||
2056 | /* Put the string on the free-list. */ | |
2057 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
2058 | string_free_list = s; | |
2059 | ++nfree; | |
2060 | } | |
2061 | } | |
2062 | else | |
2063 | { | |
2064 | /* S was on the free-list before. Put it there again. */ | |
2065 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
2066 | string_free_list = s; | |
2067 | ++nfree; | |
2068 | } | |
2069 | } | |
2070 | ||
34400008 | 2071 | /* Free blocks that contain free Lisp_Strings only, except |
2e471eb5 | 2072 | the first two of them. */ |
19bcad1f SM |
2073 | if (nfree == STRING_BLOCK_SIZE |
2074 | && total_free_strings > STRING_BLOCK_SIZE) | |
2e471eb5 GM |
2075 | { |
2076 | lisp_free (b); | |
2077 | --n_string_blocks; | |
2078 | string_free_list = free_list_before; | |
2079 | } | |
2080 | else | |
2081 | { | |
2082 | total_free_strings += nfree; | |
2083 | b->next = live_blocks; | |
2084 | live_blocks = b; | |
2085 | } | |
2086 | } | |
2087 | ||
bdbed949 | 2088 | check_string_free_list (); |
212f33f1 | 2089 | |
2e471eb5 GM |
2090 | string_blocks = live_blocks; |
2091 | free_large_strings (); | |
2092 | compact_small_strings (); | |
212f33f1 | 2093 | |
bdbed949 | 2094 | check_string_free_list (); |
2e471eb5 GM |
2095 | } |
2096 | ||
2097 | ||
2098 | /* Free dead large strings. */ | |
2099 | ||
2100 | static void | |
971de7fb | 2101 | free_large_strings (void) |
2e471eb5 GM |
2102 | { |
2103 | struct sblock *b, *next; | |
2104 | struct sblock *live_blocks = NULL; | |
177c0ea7 | 2105 | |
2e471eb5 GM |
2106 | for (b = large_sblocks; b; b = next) |
2107 | { | |
2108 | next = b->next; | |
2109 | ||
2110 | if (b->first_data.string == NULL) | |
2111 | lisp_free (b); | |
2112 | else | |
2113 | { | |
2114 | b->next = live_blocks; | |
2115 | live_blocks = b; | |
2116 | } | |
2117 | } | |
2118 | ||
2119 | large_sblocks = live_blocks; | |
2120 | } | |
2121 | ||
2122 | ||
2123 | /* Compact data of small strings. Free sblocks that don't contain | |
2124 | data of live strings after compaction. */ | |
2125 | ||
2126 | static void | |
971de7fb | 2127 | compact_small_strings (void) |
2e471eb5 GM |
2128 | { |
2129 | struct sblock *b, *tb, *next; | |
2130 | struct sdata *from, *to, *end, *tb_end; | |
2131 | struct sdata *to_end, *from_end; | |
2132 | ||
2133 | /* TB is the sblock we copy to, TO is the sdata within TB we copy | |
2134 | to, and TB_END is the end of TB. */ | |
2135 | tb = oldest_sblock; | |
2136 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
2137 | to = &tb->first_data; | |
2138 | ||
2139 | /* Step through the blocks from the oldest to the youngest. We | |
2140 | expect that old blocks will stabilize over time, so that less | |
2141 | copying will happen this way. */ | |
2142 | for (b = oldest_sblock; b; b = b->next) | |
2143 | { | |
2144 | end = b->next_free; | |
2145 | xassert ((char *) end <= (char *) b + SBLOCK_SIZE); | |
177c0ea7 | 2146 | |
2e471eb5 GM |
2147 | for (from = &b->first_data; from < end; from = from_end) |
2148 | { | |
2149 | /* Compute the next FROM here because copying below may | |
2150 | overwrite data we need to compute it. */ | |
14162469 | 2151 | EMACS_INT nbytes; |
2e471eb5 | 2152 | |
31d929e5 GM |
2153 | #ifdef GC_CHECK_STRING_BYTES |
2154 | /* Check that the string size recorded in the string is the | |
2155 | same as the one recorded in the sdata structure. */ | |
2156 | if (from->string | |
2157 | && GC_STRING_BYTES (from->string) != SDATA_NBYTES (from)) | |
2158 | abort (); | |
2159 | #endif /* GC_CHECK_STRING_BYTES */ | |
177c0ea7 | 2160 | |
2e471eb5 GM |
2161 | if (from->string) |
2162 | nbytes = GC_STRING_BYTES (from->string); | |
2163 | else | |
31d929e5 | 2164 | nbytes = SDATA_NBYTES (from); |
177c0ea7 | 2165 | |
212f33f1 KS |
2166 | if (nbytes > LARGE_STRING_BYTES) |
2167 | abort (); | |
212f33f1 | 2168 | |
2e471eb5 | 2169 | nbytes = SDATA_SIZE (nbytes); |
212f33f1 KS |
2170 | from_end = (struct sdata *) ((char *) from + nbytes + GC_STRING_EXTRA); |
2171 | ||
2172 | #ifdef GC_CHECK_STRING_OVERRUN | |
72af86bd AS |
2173 | if (memcmp (string_overrun_cookie, |
2174 | (char *) from_end - GC_STRING_OVERRUN_COOKIE_SIZE, | |
2175 | GC_STRING_OVERRUN_COOKIE_SIZE)) | |
212f33f1 KS |
2176 | abort (); |
2177 | #endif | |
177c0ea7 | 2178 | |
2e471eb5 GM |
2179 | /* FROM->string non-null means it's alive. Copy its data. */ |
2180 | if (from->string) | |
2181 | { | |
2182 | /* If TB is full, proceed with the next sblock. */ | |
212f33f1 | 2183 | to_end = (struct sdata *) ((char *) to + nbytes + GC_STRING_EXTRA); |
2e471eb5 GM |
2184 | if (to_end > tb_end) |
2185 | { | |
2186 | tb->next_free = to; | |
2187 | tb = tb->next; | |
2188 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
2189 | to = &tb->first_data; | |
212f33f1 | 2190 | to_end = (struct sdata *) ((char *) to + nbytes + GC_STRING_EXTRA); |
2e471eb5 | 2191 | } |
177c0ea7 | 2192 | |
2e471eb5 GM |
2193 | /* Copy, and update the string's `data' pointer. */ |
2194 | if (from != to) | |
2195 | { | |
a2407477 | 2196 | xassert (tb != b || to <= from); |
72af86bd | 2197 | memmove (to, from, nbytes + GC_STRING_EXTRA); |
31d929e5 | 2198 | to->string->data = SDATA_DATA (to); |
2e471eb5 GM |
2199 | } |
2200 | ||
2201 | /* Advance past the sdata we copied to. */ | |
2202 | to = to_end; | |
2203 | } | |
2204 | } | |
2205 | } | |
2206 | ||
2207 | /* The rest of the sblocks following TB don't contain live data, so | |
2208 | we can free them. */ | |
2209 | for (b = tb->next; b; b = next) | |
2210 | { | |
2211 | next = b->next; | |
2212 | lisp_free (b); | |
2213 | } | |
2214 | ||
2215 | tb->next_free = to; | |
2216 | tb->next = NULL; | |
2217 | current_sblock = tb; | |
2218 | } | |
2219 | ||
2220 | ||
2221 | DEFUN ("make-string", Fmake_string, Smake_string, 2, 2, 0, | |
69623621 RS |
2222 | doc: /* Return a newly created string of length LENGTH, with INIT in each element. |
2223 | LENGTH must be an integer. | |
2224 | INIT must be an integer that represents a character. */) | |
5842a27b | 2225 | (Lisp_Object length, Lisp_Object init) |
2e471eb5 GM |
2226 | { |
2227 | register Lisp_Object val; | |
2228 | register unsigned char *p, *end; | |
14162469 EZ |
2229 | int c; |
2230 | EMACS_INT nbytes; | |
2e471eb5 | 2231 | |
b7826503 PJ |
2232 | CHECK_NATNUM (length); |
2233 | CHECK_NUMBER (init); | |
2e471eb5 GM |
2234 | |
2235 | c = XINT (init); | |
830ff83b | 2236 | if (ASCII_CHAR_P (c)) |
2e471eb5 GM |
2237 | { |
2238 | nbytes = XINT (length); | |
2239 | val = make_uninit_string (nbytes); | |
d5db4077 KR |
2240 | p = SDATA (val); |
2241 | end = p + SCHARS (val); | |
2e471eb5 GM |
2242 | while (p != end) |
2243 | *p++ = c; | |
2244 | } | |
2245 | else | |
2246 | { | |
d942b71c | 2247 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2e471eb5 | 2248 | int len = CHAR_STRING (c, str); |
14162469 | 2249 | EMACS_INT string_len = XINT (length); |
2e471eb5 | 2250 | |
14162469 EZ |
2251 | if (string_len > MOST_POSITIVE_FIXNUM / len) |
2252 | error ("Maximum string size exceeded"); | |
2253 | nbytes = len * string_len; | |
2254 | val = make_uninit_multibyte_string (string_len, nbytes); | |
d5db4077 | 2255 | p = SDATA (val); |
2e471eb5 GM |
2256 | end = p + nbytes; |
2257 | while (p != end) | |
2258 | { | |
72af86bd | 2259 | memcpy (p, str, len); |
2e471eb5 GM |
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, | |
909e3b33 | 2270 | doc: /* Return a new bool-vector of length LENGTH, using INIT for each element. |
7ee72033 | 2271 | LENGTH must be a number. INIT matters only in whether it is t or nil. */) |
5842a27b | 2272 | (Lisp_Object length, Lisp_Object init) |
2e471eb5 GM |
2273 | { |
2274 | register Lisp_Object val; | |
2275 | struct Lisp_Bool_Vector *p; | |
2276 | int real_init, i; | |
14162469 EZ |
2277 | EMACS_INT length_in_chars, length_in_elts; |
2278 | int bits_per_value; | |
2e471eb5 | 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); | |
177c0ea7 | 2291 | |
2e471eb5 | 2292 | /* Get rid of any bits that would cause confusion. */ |
d2029e5b | 2293 | XVECTOR (val)->size = 0; /* No Lisp_Object to trace in there. */ |
d0fdb6da | 2294 | /* Use XVECTOR (val) rather than `p' because p->size is not TRT. */ |
d2029e5b SM |
2295 | XSETPVECTYPE (XVECTOR (val), PVEC_BOOL_VECTOR); |
2296 | ||
2297 | p = XBOOL_VECTOR (val); | |
2e471eb5 | 2298 | p->size = XFASTINT (length); |
177c0ea7 | 2299 | |
2e471eb5 GM |
2300 | real_init = (NILP (init) ? 0 : -1); |
2301 | for (i = 0; i < length_in_chars ; i++) | |
2302 | p->data[i] = real_init; | |
177c0ea7 | 2303 | |
2e471eb5 | 2304 | /* Clear the extraneous bits in the last byte. */ |
a097329f | 2305 | if (XINT (length) != length_in_chars * BOOL_VECTOR_BITS_PER_CHAR) |
d2029e5b | 2306 | p->data[length_in_chars - 1] |
a097329f | 2307 | &= (1 << (XINT (length) % BOOL_VECTOR_BITS_PER_CHAR)) - 1; |
2e471eb5 GM |
2308 | |
2309 | return val; | |
2310 | } | |
2311 | ||
2312 | ||
2313 | /* Make a string from NBYTES bytes at CONTENTS, and compute the number | |
2314 | of characters from the contents. This string may be unibyte or | |
2315 | multibyte, depending on the contents. */ | |
2316 | ||
2317 | Lisp_Object | |
14162469 | 2318 | make_string (const char *contents, EMACS_INT nbytes) |
2e471eb5 GM |
2319 | { |
2320 | register Lisp_Object val; | |
14162469 | 2321 | EMACS_INT nchars, multibyte_nbytes; |
9eac9d59 KH |
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 | |
14162469 | 2337 | make_unibyte_string (const char *contents, EMACS_INT length) |
2e471eb5 GM |
2338 | { |
2339 | register Lisp_Object val; | |
2340 | val = make_uninit_string (length); | |
72af86bd | 2341 | memcpy (SDATA (val), contents, length); |
d5db4077 | 2342 | STRING_SET_UNIBYTE (val); |
2e471eb5 GM |
2343 | return val; |
2344 | } | |
2345 | ||
2346 | ||
2347 | /* Make a multibyte string from NCHARS characters occupying NBYTES | |
2348 | bytes at CONTENTS. */ | |
2349 | ||
2350 | Lisp_Object | |
14162469 EZ |
2351 | make_multibyte_string (const char *contents, |
2352 | EMACS_INT nchars, EMACS_INT nbytes) | |
2e471eb5 GM |
2353 | { |
2354 | register Lisp_Object val; | |
2355 | val = make_uninit_multibyte_string (nchars, nbytes); | |
72af86bd | 2356 | memcpy (SDATA (val), contents, nbytes); |
2e471eb5 GM |
2357 | return val; |
2358 | } | |
2359 | ||
2360 | ||
2361 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
2362 | CONTENTS. It is a multibyte string if NBYTES != NCHARS. */ | |
2363 | ||
2364 | Lisp_Object | |
14162469 EZ |
2365 | make_string_from_bytes (const char *contents, |
2366 | EMACS_INT nchars, EMACS_INT nbytes) | |
2e471eb5 GM |
2367 | { |
2368 | register Lisp_Object val; | |
2369 | val = make_uninit_multibyte_string (nchars, nbytes); | |
72af86bd | 2370 | memcpy (SDATA (val), contents, nbytes); |
d5db4077 KR |
2371 | if (SBYTES (val) == SCHARS (val)) |
2372 | STRING_SET_UNIBYTE (val); | |
2e471eb5 GM |
2373 | return val; |
2374 | } | |
2375 | ||
2376 | ||
2377 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
2378 | CONTENTS. The argument MULTIBYTE controls whether to label the | |
229b28c4 KH |
2379 | string as multibyte. If NCHARS is negative, it counts the number of |
2380 | characters by itself. */ | |
2e471eb5 GM |
2381 | |
2382 | Lisp_Object | |
14162469 EZ |
2383 | make_specified_string (const char *contents, |
2384 | EMACS_INT nchars, EMACS_INT nbytes, int multibyte) | |
2e471eb5 GM |
2385 | { |
2386 | register Lisp_Object val; | |
229b28c4 KH |
2387 | |
2388 | if (nchars < 0) | |
2389 | { | |
2390 | if (multibyte) | |
2391 | nchars = multibyte_chars_in_text (contents, nbytes); | |
2392 | else | |
2393 | nchars = nbytes; | |
2394 | } | |
2e471eb5 | 2395 | val = make_uninit_multibyte_string (nchars, nbytes); |
72af86bd | 2396 | memcpy (SDATA (val), contents, nbytes); |
2e471eb5 | 2397 | if (!multibyte) |
d5db4077 | 2398 | STRING_SET_UNIBYTE (val); |
2e471eb5 GM |
2399 | return val; |
2400 | } | |
2401 | ||
2402 | ||
2403 | /* Make a string from the data at STR, treating it as multibyte if the | |
2404 | data warrants. */ | |
2405 | ||
2406 | Lisp_Object | |
971de7fb | 2407 | build_string (const char *str) |
2e471eb5 GM |
2408 | { |
2409 | return make_string (str, strlen (str)); | |
2410 | } | |
2411 | ||
2412 | ||
2413 | /* Return an unibyte Lisp_String set up to hold LENGTH characters | |
2414 | occupying LENGTH bytes. */ | |
2415 | ||
2416 | Lisp_Object | |
413d18e7 | 2417 | make_uninit_string (EMACS_INT length) |
2e471eb5 GM |
2418 | { |
2419 | Lisp_Object val; | |
4d774b0f JB |
2420 | |
2421 | if (!length) | |
2422 | return empty_unibyte_string; | |
2e471eb5 | 2423 | val = make_uninit_multibyte_string (length, length); |
d5db4077 | 2424 | STRING_SET_UNIBYTE (val); |
2e471eb5 GM |
2425 | return val; |
2426 | } | |
2427 | ||
2428 | ||
2429 | /* Return a multibyte Lisp_String set up to hold NCHARS characters | |
2430 | which occupy NBYTES bytes. */ | |
2431 | ||
2432 | Lisp_Object | |
413d18e7 | 2433 | make_uninit_multibyte_string (EMACS_INT nchars, EMACS_INT nbytes) |
2e471eb5 GM |
2434 | { |
2435 | Lisp_Object string; | |
2436 | struct Lisp_String *s; | |
2437 | ||
2438 | if (nchars < 0) | |
2439 | abort (); | |
4d774b0f JB |
2440 | if (!nbytes) |
2441 | return empty_multibyte_string; | |
2e471eb5 GM |
2442 | |
2443 | s = allocate_string (); | |
2444 | allocate_string_data (s, nchars, nbytes); | |
2445 | XSETSTRING (string, s); | |
2446 | string_chars_consed += nbytes; | |
2447 | return string; | |
2448 | } | |
2449 | ||
2450 | ||
2451 | \f | |
2452 | /*********************************************************************** | |
2453 | Float Allocation | |
2454 | ***********************************************************************/ | |
2455 | ||
2e471eb5 GM |
2456 | /* We store float cells inside of float_blocks, allocating a new |
2457 | float_block with malloc whenever necessary. Float cells reclaimed | |
2458 | by GC are put on a free list to be reallocated before allocating | |
ab6780cd | 2459 | any new float cells from the latest float_block. */ |
2e471eb5 | 2460 | |
6b61353c KH |
2461 | #define FLOAT_BLOCK_SIZE \ |
2462 | (((BLOCK_BYTES - sizeof (struct float_block *) \ | |
2463 | /* The compiler might add padding at the end. */ \ | |
2464 | - (sizeof (struct Lisp_Float) - sizeof (int))) * CHAR_BIT) \ | |
ab6780cd SM |
2465 | / (sizeof (struct Lisp_Float) * CHAR_BIT + 1)) |
2466 | ||
2467 | #define GETMARKBIT(block,n) \ | |
2468 | (((block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2469 | >> ((n) % (sizeof(int) * CHAR_BIT))) \ | |
2470 | & 1) | |
2471 | ||
2472 | #define SETMARKBIT(block,n) \ | |
2473 | (block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2474 | |= 1 << ((n) % (sizeof(int) * CHAR_BIT)) | |
2475 | ||
2476 | #define UNSETMARKBIT(block,n) \ | |
2477 | (block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2478 | &= ~(1 << ((n) % (sizeof(int) * CHAR_BIT))) | |
2479 | ||
2480 | #define FLOAT_BLOCK(fptr) \ | |
2481 | ((struct float_block *)(((EMACS_UINT)(fptr)) & ~(BLOCK_ALIGN - 1))) | |
2482 | ||
2483 | #define FLOAT_INDEX(fptr) \ | |
2484 | ((((EMACS_UINT)(fptr)) & (BLOCK_ALIGN - 1)) / sizeof (struct Lisp_Float)) | |
2e471eb5 GM |
2485 | |
2486 | struct float_block | |
2487 | { | |
ab6780cd | 2488 | /* Place `floats' at the beginning, to ease up FLOAT_INDEX's job. */ |
2e471eb5 | 2489 | struct Lisp_Float floats[FLOAT_BLOCK_SIZE]; |
ab6780cd SM |
2490 | int gcmarkbits[1 + FLOAT_BLOCK_SIZE / (sizeof(int) * CHAR_BIT)]; |
2491 | struct float_block *next; | |
2e471eb5 GM |
2492 | }; |
2493 | ||
ab6780cd SM |
2494 | #define FLOAT_MARKED_P(fptr) \ |
2495 | GETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2496 | ||
2497 | #define FLOAT_MARK(fptr) \ | |
2498 | SETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2499 | ||
2500 | #define FLOAT_UNMARK(fptr) \ | |
2501 | UNSETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2502 | ||
34400008 GM |
2503 | /* Current float_block. */ |
2504 | ||
2e471eb5 | 2505 | struct float_block *float_block; |
34400008 GM |
2506 | |
2507 | /* Index of first unused Lisp_Float in the current float_block. */ | |
2508 | ||
2e471eb5 GM |
2509 | int float_block_index; |
2510 | ||
2511 | /* Total number of float blocks now in use. */ | |
2512 | ||
2513 | int n_float_blocks; | |
2514 | ||
34400008 GM |
2515 | /* Free-list of Lisp_Floats. */ |
2516 | ||
2e471eb5 GM |
2517 | struct Lisp_Float *float_free_list; |
2518 | ||
34400008 | 2519 | |
966533c9 | 2520 | /* Initialize float allocation. */ |
34400008 | 2521 | |
d3d47262 | 2522 | static void |
971de7fb | 2523 | init_float (void) |
2e471eb5 | 2524 | { |
08b7c2cb SM |
2525 | float_block = NULL; |
2526 | float_block_index = FLOAT_BLOCK_SIZE; /* Force alloc of new float_block. */ | |
2e471eb5 | 2527 | float_free_list = 0; |
08b7c2cb | 2528 | n_float_blocks = 0; |
2e471eb5 GM |
2529 | } |
2530 | ||
34400008 | 2531 | |
34400008 GM |
2532 | /* Return a new float object with value FLOAT_VALUE. */ |
2533 | ||
2e471eb5 | 2534 | Lisp_Object |
971de7fb | 2535 | make_float (double float_value) |
2e471eb5 GM |
2536 | { |
2537 | register Lisp_Object val; | |
2538 | ||
e2984df0 CY |
2539 | /* eassert (!handling_signal); */ |
2540 | ||
dafc79fa | 2541 | MALLOC_BLOCK_INPUT; |
cfb2f32e | 2542 | |
2e471eb5 GM |
2543 | if (float_free_list) |
2544 | { | |
2545 | /* We use the data field for chaining the free list | |
2546 | so that we won't use the same field that has the mark bit. */ | |
2547 | XSETFLOAT (val, float_free_list); | |
28a099a4 | 2548 | float_free_list = float_free_list->u.chain; |
2e471eb5 GM |
2549 | } |
2550 | else | |
2551 | { | |
2552 | if (float_block_index == FLOAT_BLOCK_SIZE) | |
2553 | { | |
2554 | register struct float_block *new; | |
2555 | ||
ab6780cd SM |
2556 | new = (struct float_block *) lisp_align_malloc (sizeof *new, |
2557 | MEM_TYPE_FLOAT); | |
2e471eb5 | 2558 | new->next = float_block; |
72af86bd | 2559 | memset (new->gcmarkbits, 0, sizeof new->gcmarkbits); |
2e471eb5 GM |
2560 | float_block = new; |
2561 | float_block_index = 0; | |
2562 | n_float_blocks++; | |
2563 | } | |
6b61353c KH |
2564 | XSETFLOAT (val, &float_block->floats[float_block_index]); |
2565 | float_block_index++; | |
2e471eb5 | 2566 | } |
177c0ea7 | 2567 | |
dafc79fa | 2568 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 2569 | |
f601cdf3 | 2570 | XFLOAT_INIT (val, float_value); |
6b61353c | 2571 | eassert (!FLOAT_MARKED_P (XFLOAT (val))); |
2e471eb5 GM |
2572 | consing_since_gc += sizeof (struct Lisp_Float); |
2573 | floats_consed++; | |
2574 | return val; | |
2575 | } | |
2576 | ||
2e471eb5 GM |
2577 | |
2578 | \f | |
2579 | /*********************************************************************** | |
2580 | Cons Allocation | |
2581 | ***********************************************************************/ | |
2582 | ||
2583 | /* We store cons cells inside of cons_blocks, allocating a new | |
2584 | cons_block with malloc whenever necessary. Cons cells reclaimed by | |
2585 | GC are put on a free list to be reallocated before allocating | |
08b7c2cb | 2586 | any new cons cells from the latest cons_block. */ |
2e471eb5 GM |
2587 | |
2588 | #define CONS_BLOCK_SIZE \ | |
08b7c2cb SM |
2589 | (((BLOCK_BYTES - sizeof (struct cons_block *)) * CHAR_BIT) \ |
2590 | / (sizeof (struct Lisp_Cons) * CHAR_BIT + 1)) | |
2591 | ||
2592 | #define CONS_BLOCK(fptr) \ | |
2593 | ((struct cons_block *)(((EMACS_UINT)(fptr)) & ~(BLOCK_ALIGN - 1))) | |
2594 | ||
2595 | #define CONS_INDEX(fptr) \ | |
2596 | ((((EMACS_UINT)(fptr)) & (BLOCK_ALIGN - 1)) / sizeof (struct Lisp_Cons)) | |
2e471eb5 GM |
2597 | |
2598 | struct cons_block | |
2599 | { | |
08b7c2cb | 2600 | /* Place `conses' at the beginning, to ease up CONS_INDEX's job. */ |
2e471eb5 | 2601 | struct Lisp_Cons conses[CONS_BLOCK_SIZE]; |
08b7c2cb SM |
2602 | int gcmarkbits[1 + CONS_BLOCK_SIZE / (sizeof(int) * CHAR_BIT)]; |
2603 | struct cons_block *next; | |
2e471eb5 GM |
2604 | }; |
2605 | ||
08b7c2cb SM |
2606 | #define CONS_MARKED_P(fptr) \ |
2607 | GETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2608 | ||
2609 | #define CONS_MARK(fptr) \ | |
2610 | SETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2611 | ||
2612 | #define CONS_UNMARK(fptr) \ | |
2613 | UNSETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2614 | ||
34400008 GM |
2615 | /* Current cons_block. */ |
2616 | ||
2e471eb5 | 2617 | struct cons_block *cons_block; |
34400008 GM |
2618 | |
2619 | /* Index of first unused Lisp_Cons in the current block. */ | |
2620 | ||
2e471eb5 GM |
2621 | int cons_block_index; |
2622 | ||
34400008 GM |
2623 | /* Free-list of Lisp_Cons structures. */ |
2624 | ||
2e471eb5 GM |
2625 | struct Lisp_Cons *cons_free_list; |
2626 | ||
2627 | /* Total number of cons blocks now in use. */ | |
2628 | ||
d3d47262 | 2629 | static int n_cons_blocks; |
2e471eb5 | 2630 | |
34400008 GM |
2631 | |
2632 | /* Initialize cons allocation. */ | |
2633 | ||
d3d47262 | 2634 | static void |
971de7fb | 2635 | init_cons (void) |
2e471eb5 | 2636 | { |
08b7c2cb SM |
2637 | cons_block = NULL; |
2638 | cons_block_index = CONS_BLOCK_SIZE; /* Force alloc of new cons_block. */ | |
2e471eb5 | 2639 | cons_free_list = 0; |
08b7c2cb | 2640 | n_cons_blocks = 0; |
2e471eb5 GM |
2641 | } |
2642 | ||
34400008 GM |
2643 | |
2644 | /* Explicitly free a cons cell by putting it on the free-list. */ | |
2e471eb5 GM |
2645 | |
2646 | void | |
971de7fb | 2647 | free_cons (struct Lisp_Cons *ptr) |
2e471eb5 | 2648 | { |
28a099a4 | 2649 | ptr->u.chain = cons_free_list; |
34400008 GM |
2650 | #if GC_MARK_STACK |
2651 | ptr->car = Vdead; | |
2652 | #endif | |
2e471eb5 GM |
2653 | cons_free_list = ptr; |
2654 | } | |
2655 | ||
2656 | DEFUN ("cons", Fcons, Scons, 2, 2, 0, | |
a6266d23 | 2657 | doc: /* Create a new cons, give it CAR and CDR as components, and return it. */) |
5842a27b | 2658 | (Lisp_Object car, Lisp_Object cdr) |
2e471eb5 GM |
2659 | { |
2660 | register Lisp_Object val; | |
2661 | ||
e2984df0 CY |
2662 | /* eassert (!handling_signal); */ |
2663 | ||
dafc79fa | 2664 | MALLOC_BLOCK_INPUT; |
cfb2f32e | 2665 | |
2e471eb5 GM |
2666 | if (cons_free_list) |
2667 | { | |
2668 | /* We use the cdr for chaining the free list | |
2669 | so that we won't use the same field that has the mark bit. */ | |
2670 | XSETCONS (val, cons_free_list); | |
28a099a4 | 2671 | cons_free_list = cons_free_list->u.chain; |
2e471eb5 GM |
2672 | } |
2673 | else | |
2674 | { | |
2675 | if (cons_block_index == CONS_BLOCK_SIZE) | |
2676 | { | |
2677 | register struct cons_block *new; | |
08b7c2cb SM |
2678 | new = (struct cons_block *) lisp_align_malloc (sizeof *new, |
2679 | MEM_TYPE_CONS); | |
72af86bd | 2680 | memset (new->gcmarkbits, 0, sizeof new->gcmarkbits); |
2e471eb5 GM |
2681 | new->next = cons_block; |
2682 | cons_block = new; | |
2683 | cons_block_index = 0; | |
2684 | n_cons_blocks++; | |
2685 | } | |
6b61353c KH |
2686 | XSETCONS (val, &cons_block->conses[cons_block_index]); |
2687 | cons_block_index++; | |
2e471eb5 | 2688 | } |
177c0ea7 | 2689 | |
dafc79fa | 2690 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 2691 | |
f3fbd155 KR |
2692 | XSETCAR (val, car); |
2693 | XSETCDR (val, cdr); | |
6b61353c | 2694 | eassert (!CONS_MARKED_P (XCONS (val))); |
2e471eb5 GM |
2695 | consing_since_gc += sizeof (struct Lisp_Cons); |
2696 | cons_cells_consed++; | |
2697 | return val; | |
2698 | } | |
2699 | ||
e3e56238 RS |
2700 | /* Get an error now if there's any junk in the cons free list. */ |
2701 | void | |
971de7fb | 2702 | check_cons_list (void) |
e3e56238 | 2703 | { |
212f33f1 | 2704 | #ifdef GC_CHECK_CONS_LIST |
e3e56238 RS |
2705 | struct Lisp_Cons *tail = cons_free_list; |
2706 | ||
e3e56238 | 2707 | while (tail) |
28a099a4 | 2708 | tail = tail->u.chain; |
e3e56238 RS |
2709 | #endif |
2710 | } | |
34400008 | 2711 | |
9b306d37 KS |
2712 | /* Make a list of 1, 2, 3, 4 or 5 specified objects. */ |
2713 | ||
2714 | Lisp_Object | |
971de7fb | 2715 | list1 (Lisp_Object arg1) |
9b306d37 KS |
2716 | { |
2717 | return Fcons (arg1, Qnil); | |
2718 | } | |
2e471eb5 GM |
2719 | |
2720 | Lisp_Object | |
971de7fb | 2721 | list2 (Lisp_Object arg1, Lisp_Object arg2) |
2e471eb5 GM |
2722 | { |
2723 | return Fcons (arg1, Fcons (arg2, Qnil)); | |
2724 | } | |
2725 | ||
34400008 | 2726 | |
2e471eb5 | 2727 | Lisp_Object |
971de7fb | 2728 | list3 (Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
2e471eb5 GM |
2729 | { |
2730 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Qnil))); | |
2731 | } | |
2732 | ||
34400008 | 2733 | |
2e471eb5 | 2734 | Lisp_Object |
971de7fb | 2735 | list4 (Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, Lisp_Object arg4) |
2e471eb5 GM |
2736 | { |
2737 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, Qnil)))); | |
2738 | } | |
2739 | ||
34400008 | 2740 | |
2e471eb5 | 2741 | Lisp_Object |
971de7fb | 2742 | list5 (Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5) |
2e471eb5 GM |
2743 | { |
2744 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, | |
2745 | Fcons (arg5, Qnil))))); | |
2746 | } | |
2747 | ||
34400008 | 2748 | |
2e471eb5 | 2749 | DEFUN ("list", Flist, Slist, 0, MANY, 0, |
eae936e2 | 2750 | doc: /* Return a newly created list with specified arguments as elements. |
ae8e8122 MB |
2751 | Any number of arguments, even zero arguments, are allowed. |
2752 | usage: (list &rest OBJECTS) */) | |
5842a27b | 2753 | (int nargs, register Lisp_Object *args) |
2e471eb5 GM |
2754 | { |
2755 | register Lisp_Object val; | |
2756 | val = Qnil; | |
2757 | ||
2758 | while (nargs > 0) | |
2759 | { | |
2760 | nargs--; | |
2761 | val = Fcons (args[nargs], val); | |
2762 | } | |
2763 | return val; | |
2764 | } | |
2765 | ||
34400008 | 2766 | |
2e471eb5 | 2767 | DEFUN ("make-list", Fmake_list, Smake_list, 2, 2, 0, |
a6266d23 | 2768 | doc: /* Return a newly created list of length LENGTH, with each element being INIT. */) |
5842a27b | 2769 | (register Lisp_Object length, Lisp_Object init) |
2e471eb5 GM |
2770 | { |
2771 | register Lisp_Object val; | |
14162469 | 2772 | register EMACS_INT size; |
2e471eb5 | 2773 | |
b7826503 | 2774 | CHECK_NATNUM (length); |
2e471eb5 GM |
2775 | size = XFASTINT (length); |
2776 | ||
2777 | val = Qnil; | |
ce070307 GM |
2778 | while (size > 0) |
2779 | { | |
2780 | val = Fcons (init, val); | |
2781 | --size; | |
2782 | ||
2783 | if (size > 0) | |
2784 | { | |
2785 | val = Fcons (init, val); | |
2786 | --size; | |
177c0ea7 | 2787 | |
ce070307 GM |
2788 | if (size > 0) |
2789 | { | |
2790 | val = Fcons (init, val); | |
2791 | --size; | |
177c0ea7 | 2792 | |
ce070307 GM |
2793 | if (size > 0) |
2794 | { | |
2795 | val = Fcons (init, val); | |
2796 | --size; | |
177c0ea7 | 2797 | |
ce070307 GM |
2798 | if (size > 0) |
2799 | { | |
2800 | val = Fcons (init, val); | |
2801 | --size; | |
2802 | } | |
2803 | } | |
2804 | } | |
2805 | } | |
2806 | ||
2807 | QUIT; | |
2808 | } | |
177c0ea7 | 2809 | |
7146af97 JB |
2810 | return val; |
2811 | } | |
2e471eb5 GM |
2812 | |
2813 | ||
7146af97 | 2814 | \f |
2e471eb5 GM |
2815 | /*********************************************************************** |
2816 | Vector Allocation | |
2817 | ***********************************************************************/ | |
7146af97 | 2818 | |
34400008 GM |
2819 | /* Singly-linked list of all vectors. */ |
2820 | ||
d3d47262 | 2821 | static struct Lisp_Vector *all_vectors; |
7146af97 | 2822 | |
2e471eb5 GM |
2823 | /* Total number of vector-like objects now in use. */ |
2824 | ||
d3d47262 | 2825 | static int n_vectors; |
c8099634 | 2826 | |
34400008 GM |
2827 | |
2828 | /* Value is a pointer to a newly allocated Lisp_Vector structure | |
2829 | with room for LEN Lisp_Objects. */ | |
2830 | ||
ece93c02 | 2831 | static struct Lisp_Vector * |
971de7fb | 2832 | allocate_vectorlike (EMACS_INT len) |
1825c68d KH |
2833 | { |
2834 | struct Lisp_Vector *p; | |
675d5130 | 2835 | size_t nbytes; |
1825c68d | 2836 | |
dafc79fa SM |
2837 | MALLOC_BLOCK_INPUT; |
2838 | ||
d1658221 | 2839 | #ifdef DOUG_LEA_MALLOC |
f8608968 GM |
2840 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
2841 | because mapped region contents are not preserved in | |
2842 | a dumped Emacs. */ | |
d1658221 RS |
2843 | mallopt (M_MMAP_MAX, 0); |
2844 | #endif | |
177c0ea7 | 2845 | |
cfb2f32e SM |
2846 | /* This gets triggered by code which I haven't bothered to fix. --Stef */ |
2847 | /* eassert (!handling_signal); */ | |
2848 | ||
34400008 | 2849 | nbytes = sizeof *p + (len - 1) * sizeof p->contents[0]; |
9c545a55 | 2850 | p = (struct Lisp_Vector *) lisp_malloc (nbytes, MEM_TYPE_VECTORLIKE); |
177c0ea7 | 2851 | |
d1658221 | 2852 | #ifdef DOUG_LEA_MALLOC |
34400008 | 2853 | /* Back to a reasonable maximum of mmap'ed areas. */ |
81d492d5 | 2854 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); |
d1658221 | 2855 | #endif |
177c0ea7 | 2856 | |
34400008 | 2857 | consing_since_gc += nbytes; |
310ea200 | 2858 | vector_cells_consed += len; |
1825c68d KH |
2859 | |
2860 | p->next = all_vectors; | |
2861 | all_vectors = p; | |
e2984df0 | 2862 | |
dafc79fa | 2863 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 2864 | |
34400008 | 2865 | ++n_vectors; |
1825c68d KH |
2866 | return p; |
2867 | } | |
2868 | ||
34400008 | 2869 | |
ece93c02 GM |
2870 | /* Allocate a vector with NSLOTS slots. */ |
2871 | ||
2872 | struct Lisp_Vector * | |
971de7fb | 2873 | allocate_vector (EMACS_INT nslots) |
ece93c02 | 2874 | { |
9c545a55 | 2875 | struct Lisp_Vector *v = allocate_vectorlike (nslots); |
ece93c02 GM |
2876 | v->size = nslots; |
2877 | return v; | |
2878 | } | |
2879 | ||
2880 | ||
2881 | /* Allocate other vector-like structures. */ | |
2882 | ||
30f95089 | 2883 | struct Lisp_Vector * |
971de7fb | 2884 | allocate_pseudovector (int memlen, int lisplen, EMACS_INT tag) |
ece93c02 | 2885 | { |
d2029e5b | 2886 | struct Lisp_Vector *v = allocate_vectorlike (memlen); |
ece93c02 | 2887 | EMACS_INT i; |
177c0ea7 | 2888 | |
d2029e5b SM |
2889 | /* Only the first lisplen slots will be traced normally by the GC. */ |
2890 | v->size = lisplen; | |
2891 | for (i = 0; i < lisplen; ++i) | |
ece93c02 | 2892 | v->contents[i] = Qnil; |
177c0ea7 | 2893 | |
d2029e5b SM |
2894 | XSETPVECTYPE (v, tag); /* Add the appropriate tag. */ |
2895 | return v; | |
2896 | } | |
d2029e5b | 2897 | |
ece93c02 | 2898 | struct Lisp_Hash_Table * |
878f97ff | 2899 | allocate_hash_table (void) |
ece93c02 | 2900 | { |
878f97ff | 2901 | return ALLOCATE_PSEUDOVECTOR (struct Lisp_Hash_Table, count, PVEC_HASH_TABLE); |
ece93c02 GM |
2902 | } |
2903 | ||
2904 | ||
2905 | struct window * | |
971de7fb | 2906 | allocate_window (void) |
ece93c02 | 2907 | { |
d2029e5b | 2908 | return ALLOCATE_PSEUDOVECTOR(struct window, current_matrix, PVEC_WINDOW); |
ece93c02 | 2909 | } |
177c0ea7 | 2910 | |
177c0ea7 | 2911 | |
4a729fd8 | 2912 | struct terminal * |
971de7fb | 2913 | allocate_terminal (void) |
4a729fd8 | 2914 | { |
d2029e5b SM |
2915 | struct terminal *t = ALLOCATE_PSEUDOVECTOR (struct terminal, |
2916 | next_terminal, PVEC_TERMINAL); | |
2917 | /* Zero out the non-GC'd fields. FIXME: This should be made unnecessary. */ | |
72af86bd AS |
2918 | memset (&t->next_terminal, 0, |
2919 | (char*) (t + 1) - (char*) &t->next_terminal); | |
ece93c02 | 2920 | |
d2029e5b | 2921 | return t; |
4a729fd8 | 2922 | } |
ece93c02 GM |
2923 | |
2924 | struct frame * | |
971de7fb | 2925 | allocate_frame (void) |
ece93c02 | 2926 | { |
d2029e5b SM |
2927 | struct frame *f = ALLOCATE_PSEUDOVECTOR (struct frame, |
2928 | face_cache, PVEC_FRAME); | |
2929 | /* Zero out the non-GC'd fields. FIXME: This should be made unnecessary. */ | |
72af86bd AS |
2930 | memset (&f->face_cache, 0, |
2931 | (char *) (f + 1) - (char *) &f->face_cache); | |
d2029e5b | 2932 | return f; |
ece93c02 GM |
2933 | } |
2934 | ||
2935 | ||
2936 | struct Lisp_Process * | |
971de7fb | 2937 | allocate_process (void) |
ece93c02 | 2938 | { |
d2029e5b | 2939 | return ALLOCATE_PSEUDOVECTOR (struct Lisp_Process, pid, PVEC_PROCESS); |
ece93c02 GM |
2940 | } |
2941 | ||
2942 | ||
7146af97 | 2943 | DEFUN ("make-vector", Fmake_vector, Smake_vector, 2, 2, 0, |
a6266d23 | 2944 | doc: /* Return a newly created vector of length LENGTH, with each element being INIT. |
7ee72033 | 2945 | See also the function `vector'. */) |
5842a27b | 2946 | (register Lisp_Object length, Lisp_Object init) |
7146af97 | 2947 | { |
1825c68d KH |
2948 | Lisp_Object vector; |
2949 | register EMACS_INT sizei; | |
14162469 | 2950 | register EMACS_INT index; |
7146af97 JB |
2951 | register struct Lisp_Vector *p; |
2952 | ||
b7826503 | 2953 | CHECK_NATNUM (length); |
c9dad5ed | 2954 | sizei = XFASTINT (length); |
7146af97 | 2955 | |
ece93c02 | 2956 | p = allocate_vector (sizei); |
7146af97 JB |
2957 | for (index = 0; index < sizei; index++) |
2958 | p->contents[index] = init; | |
2959 | ||
1825c68d | 2960 | XSETVECTOR (vector, p); |
7146af97 JB |
2961 | return vector; |
2962 | } | |
2963 | ||
34400008 | 2964 | |
b9598260 SM |
2965 | /* Return a new `function vector' containing KIND as the first element, |
2966 | followed by NUM_NIL_SLOTS nil elements, and further elements copied from | |
2967 | the vector PARAMS of length NUM_PARAMS (so the total length of the | |
2968 | resulting vector is 1 + NUM_NIL_SLOTS + NUM_PARAMS). | |
2969 | ||
2970 | If NUM_PARAMS is zero, then PARAMS may be NULL. | |
2971 | ||
2972 | A `function vector', a.k.a. `funvec', is a funcallable vector in Emacs Lisp. | |
2973 | See the function `funvec' for more detail. */ | |
2974 | ||
2975 | Lisp_Object | |
c566235d SM |
2976 | make_funvec (Lisp_Object kind, int num_nil_slots, int num_params, |
2977 | Lisp_Object *params) | |
b9598260 SM |
2978 | { |
2979 | int param_index; | |
2980 | Lisp_Object funvec; | |
2981 | ||
2982 | funvec = Fmake_vector (make_number (1 + num_nil_slots + num_params), Qnil); | |
2983 | ||
2984 | ASET (funvec, 0, kind); | |
2985 | ||
2986 | for (param_index = 0; param_index < num_params; param_index++) | |
2987 | ASET (funvec, 1 + num_nil_slots + param_index, params[param_index]); | |
2988 | ||
2989 | XSETPVECTYPE (XVECTOR (funvec), PVEC_FUNVEC); | |
2990 | XSETFUNVEC (funvec, XVECTOR (funvec)); | |
2991 | ||
2992 | return funvec; | |
2993 | } | |
2994 | ||
2995 | ||
7146af97 | 2996 | DEFUN ("vector", Fvector, Svector, 0, MANY, 0, |
eae936e2 | 2997 | doc: /* Return a newly created vector with specified arguments as elements. |
ae8e8122 MB |
2998 | Any number of arguments, even zero arguments, are allowed. |
2999 | usage: (vector &rest OBJECTS) */) | |
5842a27b | 3000 | (register int nargs, Lisp_Object *args) |
7146af97 JB |
3001 | { |
3002 | register Lisp_Object len, val; | |
3003 | register int index; | |
3004 | register struct Lisp_Vector *p; | |
3005 | ||
67ba9986 | 3006 | XSETFASTINT (len, nargs); |
7146af97 JB |
3007 | val = Fmake_vector (len, Qnil); |
3008 | p = XVECTOR (val); | |
3009 | for (index = 0; index < nargs; index++) | |
3010 | p->contents[index] = args[index]; | |
3011 | return val; | |
3012 | } | |
3013 | ||
34400008 | 3014 | |
b9598260 SM |
3015 | DEFUN ("funvec", Ffunvec, Sfunvec, 1, MANY, 0, |
3016 | doc: /* Return a newly created `function vector' of type KIND. | |
3017 | A `function vector', a.k.a. `funvec', is a funcallable vector in Emacs Lisp. | |
3018 | KIND indicates the kind of funvec, and determines its behavior when called. | |
3019 | The meaning of the remaining arguments depends on KIND. Currently | |
3020 | implemented values of KIND, and their meaning, are: | |
3021 | ||
3022 | A list -- A byte-compiled function. See `make-byte-code' for the usual | |
3023 | way to create byte-compiled functions. | |
3024 | ||
3025 | `curry' -- A curried function. Remaining arguments are a function to | |
3026 | call, and arguments to prepend to user arguments at the | |
3027 | time of the call; see the `curry' function. | |
3028 | ||
3029 | usage: (funvec KIND &rest PARAMS) */) | |
c566235d | 3030 | (int nargs, Lisp_Object *args) |
b9598260 SM |
3031 | { |
3032 | return make_funvec (args[0], 0, nargs - 1, args + 1); | |
3033 | } | |
3034 | ||
3035 | ||
7146af97 | 3036 | DEFUN ("make-byte-code", Fmake_byte_code, Smake_byte_code, 4, MANY, 0, |
a6266d23 | 3037 | doc: /* Create a byte-code object with specified arguments as elements. |
228299fa GM |
3038 | The arguments should be the arglist, bytecode-string, constant vector, |
3039 | stack size, (optional) doc string, and (optional) interactive spec. | |
3040 | The first four arguments are required; at most six have any | |
ae8e8122 | 3041 | significance. |
92cc28b2 | 3042 | usage: (make-byte-code ARGLIST BYTE-CODE CONSTANTS DEPTH &optional DOCSTRING INTERACTIVE-SPEC &rest ELEMENTS) */) |
5842a27b | 3043 | (register int nargs, Lisp_Object *args) |
7146af97 JB |
3044 | { |
3045 | register Lisp_Object len, val; | |
3046 | register int index; | |
3047 | register struct Lisp_Vector *p; | |
3048 | ||
b9598260 SM |
3049 | /* Make sure the arg-list is really a list, as that's what's used to |
3050 | distinguish a byte-compiled object from other funvecs. */ | |
3051 | CHECK_LIST (args[0]); | |
3052 | ||
67ba9986 | 3053 | XSETFASTINT (len, nargs); |
265a9e55 | 3054 | if (!NILP (Vpurify_flag)) |
5a053ea9 | 3055 | val = make_pure_vector ((EMACS_INT) nargs); |
7146af97 JB |
3056 | else |
3057 | val = Fmake_vector (len, Qnil); | |
9eac9d59 | 3058 | |
b1feb9b4 | 3059 | if (nargs > 1 && STRINGP (args[1]) && STRING_MULTIBYTE (args[1])) |
9eac9d59 KH |
3060 | /* BYTECODE-STRING must have been produced by Emacs 20.2 or the |
3061 | earlier because they produced a raw 8-bit string for byte-code | |
3062 | and now such a byte-code string is loaded as multibyte while | |
3063 | raw 8-bit characters converted to multibyte form. Thus, now we | |
3064 | must convert them back to the original unibyte form. */ | |
3065 | args[1] = Fstring_as_unibyte (args[1]); | |
3066 | ||
7146af97 JB |
3067 | p = XVECTOR (val); |
3068 | for (index = 0; index < nargs; index++) | |
3069 | { | |
265a9e55 | 3070 | if (!NILP (Vpurify_flag)) |
7146af97 JB |
3071 | args[index] = Fpurecopy (args[index]); |
3072 | p->contents[index] = args[index]; | |
3073 | } | |
b9598260 SM |
3074 | XSETPVECTYPE (p, PVEC_FUNVEC); |
3075 | XSETFUNVEC (val, p); | |
7146af97 JB |
3076 | return val; |
3077 | } | |
2e471eb5 | 3078 | |
34400008 | 3079 | |
7146af97 | 3080 | \f |
2e471eb5 GM |
3081 | /*********************************************************************** |
3082 | Symbol Allocation | |
3083 | ***********************************************************************/ | |
7146af97 | 3084 | |
2e471eb5 GM |
3085 | /* Each symbol_block is just under 1020 bytes long, since malloc |
3086 | really allocates in units of powers of two and uses 4 bytes for its | |
3087 | own overhead. */ | |
7146af97 JB |
3088 | |
3089 | #define SYMBOL_BLOCK_SIZE \ | |
3090 | ((1020 - sizeof (struct symbol_block *)) / sizeof (struct Lisp_Symbol)) | |
3091 | ||
3092 | struct symbol_block | |
2e471eb5 | 3093 | { |
6b61353c | 3094 | /* Place `symbols' first, to preserve alignment. */ |
2e471eb5 | 3095 | struct Lisp_Symbol symbols[SYMBOL_BLOCK_SIZE]; |
6b61353c | 3096 | struct symbol_block *next; |
2e471eb5 | 3097 | }; |
7146af97 | 3098 | |
34400008 GM |
3099 | /* Current symbol block and index of first unused Lisp_Symbol |
3100 | structure in it. */ | |
3101 | ||
d3d47262 JB |
3102 | static struct symbol_block *symbol_block; |
3103 | static int symbol_block_index; | |
7146af97 | 3104 | |
34400008 GM |
3105 | /* List of free symbols. */ |
3106 | ||
d3d47262 | 3107 | static struct Lisp_Symbol *symbol_free_list; |
7146af97 | 3108 | |
c8099634 | 3109 | /* Total number of symbol blocks now in use. */ |
2e471eb5 | 3110 | |
d3d47262 | 3111 | static int n_symbol_blocks; |
c8099634 | 3112 | |
34400008 GM |
3113 | |
3114 | /* Initialize symbol allocation. */ | |
3115 | ||
d3d47262 | 3116 | static void |
971de7fb | 3117 | init_symbol (void) |
7146af97 | 3118 | { |
005ca5c7 DL |
3119 | symbol_block = NULL; |
3120 | symbol_block_index = SYMBOL_BLOCK_SIZE; | |
7146af97 | 3121 | symbol_free_list = 0; |
005ca5c7 | 3122 | n_symbol_blocks = 0; |
7146af97 JB |
3123 | } |
3124 | ||
34400008 | 3125 | |
7146af97 | 3126 | DEFUN ("make-symbol", Fmake_symbol, Smake_symbol, 1, 1, 0, |
a6266d23 | 3127 | doc: /* Return a newly allocated uninterned symbol whose name is NAME. |
7ee72033 | 3128 | Its value and function definition are void, and its property list is nil. */) |
5842a27b | 3129 | (Lisp_Object name) |
7146af97 JB |
3130 | { |
3131 | register Lisp_Object val; | |
3132 | register struct Lisp_Symbol *p; | |
3133 | ||
b7826503 | 3134 | CHECK_STRING (name); |
7146af97 | 3135 | |
537407f0 | 3136 | /* eassert (!handling_signal); */ |
cfb2f32e | 3137 | |
dafc79fa | 3138 | MALLOC_BLOCK_INPUT; |
e2984df0 | 3139 | |
7146af97 JB |
3140 | if (symbol_free_list) |
3141 | { | |
45d12a89 | 3142 | XSETSYMBOL (val, symbol_free_list); |
28a099a4 | 3143 | symbol_free_list = symbol_free_list->next; |
7146af97 JB |
3144 | } |
3145 | else | |
3146 | { | |
3147 | if (symbol_block_index == SYMBOL_BLOCK_SIZE) | |
3148 | { | |
3c06d205 | 3149 | struct symbol_block *new; |
34400008 GM |
3150 | new = (struct symbol_block *) lisp_malloc (sizeof *new, |
3151 | MEM_TYPE_SYMBOL); | |
7146af97 JB |
3152 | new->next = symbol_block; |
3153 | symbol_block = new; | |
3154 | symbol_block_index = 0; | |
c8099634 | 3155 | n_symbol_blocks++; |
7146af97 | 3156 | } |
6b61353c KH |
3157 | XSETSYMBOL (val, &symbol_block->symbols[symbol_block_index]); |
3158 | symbol_block_index++; | |
7146af97 | 3159 | } |
177c0ea7 | 3160 | |
dafc79fa | 3161 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 3162 | |
7146af97 | 3163 | p = XSYMBOL (val); |
8fe5665d | 3164 | p->xname = name; |
7146af97 | 3165 | p->plist = Qnil; |
ce5b453a SM |
3166 | p->redirect = SYMBOL_PLAINVAL; |
3167 | SET_SYMBOL_VAL (p, Qunbound); | |
2e471eb5 | 3168 | p->function = Qunbound; |
9e713715 | 3169 | p->next = NULL; |
2336fe58 | 3170 | p->gcmarkbit = 0; |
9e713715 GM |
3171 | p->interned = SYMBOL_UNINTERNED; |
3172 | p->constant = 0; | |
b9598260 | 3173 | p->declared_special = 0; |
2e471eb5 GM |
3174 | consing_since_gc += sizeof (struct Lisp_Symbol); |
3175 | symbols_consed++; | |
7146af97 JB |
3176 | return val; |
3177 | } | |
3178 | ||
3f25e183 | 3179 | |
2e471eb5 GM |
3180 | \f |
3181 | /*********************************************************************** | |
34400008 | 3182 | Marker (Misc) Allocation |
2e471eb5 | 3183 | ***********************************************************************/ |
3f25e183 | 3184 | |
2e471eb5 GM |
3185 | /* Allocation of markers and other objects that share that structure. |
3186 | Works like allocation of conses. */ | |
c0696668 | 3187 | |
2e471eb5 GM |
3188 | #define MARKER_BLOCK_SIZE \ |
3189 | ((1020 - sizeof (struct marker_block *)) / sizeof (union Lisp_Misc)) | |
3190 | ||
3191 | struct marker_block | |
c0696668 | 3192 | { |
6b61353c | 3193 | /* Place `markers' first, to preserve alignment. */ |
2e471eb5 | 3194 | union Lisp_Misc markers[MARKER_BLOCK_SIZE]; |
6b61353c | 3195 | struct marker_block *next; |
2e471eb5 | 3196 | }; |
c0696668 | 3197 | |
d3d47262 JB |
3198 | static struct marker_block *marker_block; |
3199 | static int marker_block_index; | |
c0696668 | 3200 | |
d3d47262 | 3201 | static union Lisp_Misc *marker_free_list; |
c0696668 | 3202 | |
2e471eb5 | 3203 | /* Total number of marker blocks now in use. */ |
3f25e183 | 3204 | |
d3d47262 | 3205 | static int n_marker_blocks; |
2e471eb5 | 3206 | |
d3d47262 | 3207 | static void |
971de7fb | 3208 | init_marker (void) |
3f25e183 | 3209 | { |
005ca5c7 DL |
3210 | marker_block = NULL; |
3211 | marker_block_index = MARKER_BLOCK_SIZE; | |
2e471eb5 | 3212 | marker_free_list = 0; |
005ca5c7 | 3213 | n_marker_blocks = 0; |
3f25e183 RS |
3214 | } |
3215 | ||
2e471eb5 GM |
3216 | /* Return a newly allocated Lisp_Misc object, with no substructure. */ |
3217 | ||
3f25e183 | 3218 | Lisp_Object |
971de7fb | 3219 | allocate_misc (void) |
7146af97 | 3220 | { |
2e471eb5 | 3221 | Lisp_Object val; |
7146af97 | 3222 | |
e2984df0 CY |
3223 | /* eassert (!handling_signal); */ |
3224 | ||
dafc79fa | 3225 | MALLOC_BLOCK_INPUT; |
cfb2f32e | 3226 | |
2e471eb5 | 3227 | if (marker_free_list) |
7146af97 | 3228 | { |
2e471eb5 GM |
3229 | XSETMISC (val, marker_free_list); |
3230 | marker_free_list = marker_free_list->u_free.chain; | |
7146af97 JB |
3231 | } |
3232 | else | |
7146af97 | 3233 | { |
2e471eb5 GM |
3234 | if (marker_block_index == MARKER_BLOCK_SIZE) |
3235 | { | |
3236 | struct marker_block *new; | |
34400008 GM |
3237 | new = (struct marker_block *) lisp_malloc (sizeof *new, |
3238 | MEM_TYPE_MISC); | |
2e471eb5 GM |
3239 | new->next = marker_block; |
3240 | marker_block = new; | |
3241 | marker_block_index = 0; | |
3242 | n_marker_blocks++; | |
7b7990cc | 3243 | total_free_markers += MARKER_BLOCK_SIZE; |
2e471eb5 | 3244 | } |
6b61353c KH |
3245 | XSETMISC (val, &marker_block->markers[marker_block_index]); |
3246 | marker_block_index++; | |
7146af97 | 3247 | } |
177c0ea7 | 3248 | |
dafc79fa | 3249 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 3250 | |
7b7990cc | 3251 | --total_free_markers; |
2e471eb5 GM |
3252 | consing_since_gc += sizeof (union Lisp_Misc); |
3253 | misc_objects_consed++; | |
67ee9f6e | 3254 | XMISCANY (val)->gcmarkbit = 0; |
2e471eb5 GM |
3255 | return val; |
3256 | } | |
3257 | ||
7b7990cc KS |
3258 | /* Free a Lisp_Misc object */ |
3259 | ||
3260 | void | |
971de7fb | 3261 | free_misc (Lisp_Object misc) |
7b7990cc | 3262 | { |
d314756e | 3263 | XMISCTYPE (misc) = Lisp_Misc_Free; |
7b7990cc KS |
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 | |
971de7fb | 3275 | make_save_value (void *pointer, int integer) |
42172a6b RS |
3276 | { |
3277 | register Lisp_Object val; | |
3278 | register struct Lisp_Save_Value *p; | |
3279 | ||
3280 | val = allocate_misc (); | |
3281 | XMISCTYPE (val) = Lisp_Misc_Save_Value; | |
3282 | p = XSAVE_VALUE (val); | |
3283 | p->pointer = pointer; | |
3284 | p->integer = integer; | |
b766f870 | 3285 | p->dogc = 0; |
42172a6b RS |
3286 | return val; |
3287 | } | |
3288 | ||
2e471eb5 | 3289 | DEFUN ("make-marker", Fmake_marker, Smake_marker, 0, 0, 0, |
a6266d23 | 3290 | doc: /* Return a newly allocated marker which does not point at any place. */) |
5842a27b | 3291 | (void) |
2e471eb5 GM |
3292 | { |
3293 | register Lisp_Object val; | |
3294 | register struct Lisp_Marker *p; | |
7146af97 | 3295 | |
2e471eb5 GM |
3296 | val = allocate_misc (); |
3297 | XMISCTYPE (val) = Lisp_Misc_Marker; | |
3298 | p = XMARKER (val); | |
3299 | p->buffer = 0; | |
3300 | p->bytepos = 0; | |
3301 | p->charpos = 0; | |
ef89c2ce | 3302 | p->next = NULL; |
2e471eb5 | 3303 | p->insertion_type = 0; |
7146af97 JB |
3304 | return val; |
3305 | } | |
2e471eb5 GM |
3306 | |
3307 | /* Put MARKER back on the free list after using it temporarily. */ | |
3308 | ||
3309 | void | |
971de7fb | 3310 | free_marker (Lisp_Object marker) |
2e471eb5 | 3311 | { |
ef89c2ce | 3312 | unchain_marker (XMARKER (marker)); |
7b7990cc | 3313 | free_misc (marker); |
2e471eb5 GM |
3314 | } |
3315 | ||
c0696668 | 3316 | \f |
7146af97 | 3317 | /* Return a newly created vector or string with specified arguments as |
736471d1 RS |
3318 | elements. If all the arguments are characters that can fit |
3319 | in a string of events, make a string; otherwise, make a vector. | |
3320 | ||
3321 | Any number of arguments, even zero arguments, are allowed. */ | |
7146af97 JB |
3322 | |
3323 | Lisp_Object | |
971de7fb | 3324 | make_event_array (register int nargs, Lisp_Object *args) |
7146af97 JB |
3325 | { |
3326 | int i; | |
3327 | ||
3328 | for (i = 0; i < nargs; i++) | |
736471d1 | 3329 | /* The things that fit in a string |
c9ca4659 RS |
3330 | are characters that are in 0...127, |
3331 | after discarding the meta bit and all the bits above it. */ | |
e687453f | 3332 | if (!INTEGERP (args[i]) |
c9ca4659 | 3333 | || (XUINT (args[i]) & ~(-CHAR_META)) >= 0200) |
7146af97 JB |
3334 | return Fvector (nargs, args); |
3335 | ||
3336 | /* Since the loop exited, we know that all the things in it are | |
3337 | characters, so we can make a string. */ | |
3338 | { | |
c13ccad2 | 3339 | Lisp_Object result; |
177c0ea7 | 3340 | |
50aee051 | 3341 | result = Fmake_string (make_number (nargs), make_number (0)); |
7146af97 | 3342 | for (i = 0; i < nargs; i++) |
736471d1 | 3343 | { |
46e7e6b0 | 3344 | SSET (result, i, XINT (args[i])); |
736471d1 RS |
3345 | /* Move the meta bit to the right place for a string char. */ |
3346 | if (XINT (args[i]) & CHAR_META) | |
46e7e6b0 | 3347 | SSET (result, i, SREF (result, i) | 0x80); |
736471d1 | 3348 | } |
177c0ea7 | 3349 | |
7146af97 JB |
3350 | return result; |
3351 | } | |
3352 | } | |
2e471eb5 GM |
3353 | |
3354 | ||
7146af97 | 3355 | \f |
24d8a105 RS |
3356 | /************************************************************************ |
3357 | Memory Full Handling | |
3358 | ************************************************************************/ | |
3359 | ||
3360 | ||
3361 | /* Called if malloc returns zero. */ | |
3362 | ||
3363 | void | |
971de7fb | 3364 | memory_full (void) |
24d8a105 RS |
3365 | { |
3366 | int i; | |
3367 | ||
3368 | Vmemory_full = Qt; | |
3369 | ||
3370 | memory_full_cons_threshold = sizeof (struct cons_block); | |
3371 | ||
3372 | /* The first time we get here, free the spare memory. */ | |
3373 | for (i = 0; i < sizeof (spare_memory) / sizeof (char *); i++) | |
3374 | if (spare_memory[i]) | |
3375 | { | |
3376 | if (i == 0) | |
3377 | free (spare_memory[i]); | |
3378 | else if (i >= 1 && i <= 4) | |
3379 | lisp_align_free (spare_memory[i]); | |
3380 | else | |
3381 | lisp_free (spare_memory[i]); | |
3382 | spare_memory[i] = 0; | |
3383 | } | |
3384 | ||
3385 | /* Record the space now used. When it decreases substantially, | |
3386 | we can refill the memory reserve. */ | |
3387 | #ifndef SYSTEM_MALLOC | |
3388 | bytes_used_when_full = BYTES_USED; | |
3389 | #endif | |
3390 | ||
3391 | /* This used to call error, but if we've run out of memory, we could | |
3392 | get infinite recursion trying to build the string. */ | |
9b306d37 | 3393 | xsignal (Qnil, Vmemory_signal_data); |
24d8a105 RS |
3394 | } |
3395 | ||
3396 | /* If we released our reserve (due to running out of memory), | |
3397 | and we have a fair amount free once again, | |
3398 | try to set aside another reserve in case we run out once more. | |
3399 | ||
3400 | This is called when a relocatable block is freed in ralloc.c, | |
3401 | and also directly from this file, in case we're not using ralloc.c. */ | |
3402 | ||
3403 | void | |
971de7fb | 3404 | refill_memory_reserve (void) |
24d8a105 RS |
3405 | { |
3406 | #ifndef SYSTEM_MALLOC | |
3407 | if (spare_memory[0] == 0) | |
3408 | spare_memory[0] = (char *) malloc ((size_t) SPARE_MEMORY); | |
3409 | if (spare_memory[1] == 0) | |
3410 | spare_memory[1] = (char *) lisp_align_malloc (sizeof (struct cons_block), | |
3411 | MEM_TYPE_CONS); | |
3412 | if (spare_memory[2] == 0) | |
3413 | spare_memory[2] = (char *) lisp_align_malloc (sizeof (struct cons_block), | |
3414 | MEM_TYPE_CONS); | |
3415 | if (spare_memory[3] == 0) | |
3416 | spare_memory[3] = (char *) lisp_align_malloc (sizeof (struct cons_block), | |
3417 | MEM_TYPE_CONS); | |
3418 | if (spare_memory[4] == 0) | |
3419 | spare_memory[4] = (char *) lisp_align_malloc (sizeof (struct cons_block), | |
3420 | MEM_TYPE_CONS); | |
3421 | if (spare_memory[5] == 0) | |
3422 | spare_memory[5] = (char *) lisp_malloc (sizeof (struct string_block), | |
3423 | MEM_TYPE_STRING); | |
3424 | if (spare_memory[6] == 0) | |
3425 | spare_memory[6] = (char *) lisp_malloc (sizeof (struct string_block), | |
3426 | MEM_TYPE_STRING); | |
3427 | if (spare_memory[0] && spare_memory[1] && spare_memory[5]) | |
3428 | Vmemory_full = Qnil; | |
3429 | #endif | |
3430 | } | |
3431 | \f | |
34400008 GM |
3432 | /************************************************************************ |
3433 | C Stack Marking | |
3434 | ************************************************************************/ | |
3435 | ||
13c844fb GM |
3436 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
3437 | ||
71cf5fa0 GM |
3438 | /* Conservative C stack marking requires a method to identify possibly |
3439 | live Lisp objects given a pointer value. We do this by keeping | |
3440 | track of blocks of Lisp data that are allocated in a red-black tree | |
3441 | (see also the comment of mem_node which is the type of nodes in | |
3442 | that tree). Function lisp_malloc adds information for an allocated | |
3443 | block to the red-black tree with calls to mem_insert, and function | |
3444 | lisp_free removes it with mem_delete. Functions live_string_p etc | |
3445 | call mem_find to lookup information about a given pointer in the | |
3446 | tree, and use that to determine if the pointer points to a Lisp | |
3447 | object or not. */ | |
3448 | ||
34400008 GM |
3449 | /* Initialize this part of alloc.c. */ |
3450 | ||
3451 | static void | |
971de7fb | 3452 | mem_init (void) |
34400008 GM |
3453 | { |
3454 | mem_z.left = mem_z.right = MEM_NIL; | |
3455 | mem_z.parent = NULL; | |
3456 | mem_z.color = MEM_BLACK; | |
3457 | mem_z.start = mem_z.end = NULL; | |
3458 | mem_root = MEM_NIL; | |
3459 | } | |
3460 | ||
3461 | ||
3462 | /* Value is a pointer to the mem_node containing START. Value is | |
3463 | MEM_NIL if there is no node in the tree containing START. */ | |
3464 | ||
3465 | static INLINE struct mem_node * | |
971de7fb | 3466 | mem_find (void *start) |
34400008 GM |
3467 | { |
3468 | struct mem_node *p; | |
3469 | ||
ece93c02 GM |
3470 | if (start < min_heap_address || start > max_heap_address) |
3471 | return MEM_NIL; | |
3472 | ||
34400008 GM |
3473 | /* Make the search always successful to speed up the loop below. */ |
3474 | mem_z.start = start; | |
3475 | mem_z.end = (char *) start + 1; | |
3476 | ||
3477 | p = mem_root; | |
3478 | while (start < p->start || start >= p->end) | |
3479 | p = start < p->start ? p->left : p->right; | |
3480 | return p; | |
3481 | } | |
3482 | ||
3483 | ||
3484 | /* Insert a new node into the tree for a block of memory with start | |
3485 | address START, end address END, and type TYPE. Value is a | |
3486 | pointer to the node that was inserted. */ | |
3487 | ||
3488 | static struct mem_node * | |
971de7fb | 3489 | mem_insert (void *start, void *end, enum mem_type type) |
34400008 GM |
3490 | { |
3491 | struct mem_node *c, *parent, *x; | |
3492 | ||
add3c3ea | 3493 | if (min_heap_address == NULL || start < min_heap_address) |
ece93c02 | 3494 | min_heap_address = start; |
add3c3ea | 3495 | if (max_heap_address == NULL || end > max_heap_address) |
ece93c02 GM |
3496 | max_heap_address = end; |
3497 | ||
34400008 GM |
3498 | /* See where in the tree a node for START belongs. In this |
3499 | particular application, it shouldn't happen that a node is already | |
3500 | present. For debugging purposes, let's check that. */ | |
3501 | c = mem_root; | |
3502 | parent = NULL; | |
3503 | ||
3504 | #if GC_MARK_STACK != GC_MAKE_GCPROS_NOOPS | |
177c0ea7 | 3505 | |
34400008 GM |
3506 | while (c != MEM_NIL) |
3507 | { | |
3508 | if (start >= c->start && start < c->end) | |
3509 | abort (); | |
3510 | parent = c; | |
3511 | c = start < c->start ? c->left : c->right; | |
3512 | } | |
177c0ea7 | 3513 | |
34400008 | 3514 | #else /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ |
177c0ea7 | 3515 | |
34400008 GM |
3516 | while (c != MEM_NIL) |
3517 | { | |
3518 | parent = c; | |
3519 | c = start < c->start ? c->left : c->right; | |
3520 | } | |
177c0ea7 | 3521 | |
34400008 GM |
3522 | #endif /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ |
3523 | ||
3524 | /* Create a new node. */ | |
877935b1 GM |
3525 | #ifdef GC_MALLOC_CHECK |
3526 | x = (struct mem_node *) _malloc_internal (sizeof *x); | |
3527 | if (x == NULL) | |
3528 | abort (); | |
3529 | #else | |
34400008 | 3530 | x = (struct mem_node *) xmalloc (sizeof *x); |
877935b1 | 3531 | #endif |
34400008 GM |
3532 | x->start = start; |
3533 | x->end = end; | |
3534 | x->type = type; | |
3535 | x->parent = parent; | |
3536 | x->left = x->right = MEM_NIL; | |
3537 | x->color = MEM_RED; | |
3538 | ||
3539 | /* Insert it as child of PARENT or install it as root. */ | |
3540 | if (parent) | |
3541 | { | |
3542 | if (start < parent->start) | |
3543 | parent->left = x; | |
3544 | else | |
3545 | parent->right = x; | |
3546 | } | |
177c0ea7 | 3547 | else |
34400008 GM |
3548 | mem_root = x; |
3549 | ||
3550 | /* Re-establish red-black tree properties. */ | |
3551 | mem_insert_fixup (x); | |
877935b1 | 3552 | |
34400008 GM |
3553 | return x; |
3554 | } | |
3555 | ||
3556 | ||
3557 | /* Re-establish the red-black properties of the tree, and thereby | |
3558 | balance the tree, after node X has been inserted; X is always red. */ | |
3559 | ||
3560 | static void | |
971de7fb | 3561 | mem_insert_fixup (struct mem_node *x) |
34400008 GM |
3562 | { |
3563 | while (x != mem_root && x->parent->color == MEM_RED) | |
3564 | { | |
3565 | /* X is red and its parent is red. This is a violation of | |
3566 | red-black tree property #3. */ | |
177c0ea7 | 3567 | |
34400008 GM |
3568 | if (x->parent == x->parent->parent->left) |
3569 | { | |
3570 | /* We're on the left side of our grandparent, and Y is our | |
3571 | "uncle". */ | |
3572 | struct mem_node *y = x->parent->parent->right; | |
177c0ea7 | 3573 | |
34400008 GM |
3574 | if (y->color == MEM_RED) |
3575 | { | |
3576 | /* Uncle and parent are red but should be black because | |
3577 | X is red. Change the colors accordingly and proceed | |
3578 | with the grandparent. */ | |
3579 | x->parent->color = MEM_BLACK; | |
3580 | y->color = MEM_BLACK; | |
3581 | x->parent->parent->color = MEM_RED; | |
3582 | x = x->parent->parent; | |
3583 | } | |
3584 | else | |
3585 | { | |
3586 | /* Parent and uncle have different colors; parent is | |
3587 | red, uncle is black. */ | |
3588 | if (x == x->parent->right) | |
3589 | { | |
3590 | x = x->parent; | |
3591 | mem_rotate_left (x); | |
3592 | } | |
3593 | ||
3594 | x->parent->color = MEM_BLACK; | |
3595 | x->parent->parent->color = MEM_RED; | |
3596 | mem_rotate_right (x->parent->parent); | |
3597 | } | |
3598 | } | |
3599 | else | |
3600 | { | |
3601 | /* This is the symmetrical case of above. */ | |
3602 | struct mem_node *y = x->parent->parent->left; | |
177c0ea7 | 3603 | |
34400008 GM |
3604 | if (y->color == MEM_RED) |
3605 | { | |
3606 | x->parent->color = MEM_BLACK; | |
3607 | y->color = MEM_BLACK; | |
3608 | x->parent->parent->color = MEM_RED; | |
3609 | x = x->parent->parent; | |
3610 | } | |
3611 | else | |
3612 | { | |
3613 | if (x == x->parent->left) | |
3614 | { | |
3615 | x = x->parent; | |
3616 | mem_rotate_right (x); | |
3617 | } | |
177c0ea7 | 3618 | |
34400008 GM |
3619 | x->parent->color = MEM_BLACK; |
3620 | x->parent->parent->color = MEM_RED; | |
3621 | mem_rotate_left (x->parent->parent); | |
3622 | } | |
3623 | } | |
3624 | } | |
3625 | ||
3626 | /* The root may have been changed to red due to the algorithm. Set | |
3627 | it to black so that property #5 is satisfied. */ | |
3628 | mem_root->color = MEM_BLACK; | |
3629 | } | |
3630 | ||
3631 | ||
177c0ea7 JB |
3632 | /* (x) (y) |
3633 | / \ / \ | |
34400008 GM |
3634 | a (y) ===> (x) c |
3635 | / \ / \ | |
3636 | b c a b */ | |
3637 | ||
3638 | static void | |
971de7fb | 3639 | mem_rotate_left (struct mem_node *x) |
34400008 GM |
3640 | { |
3641 | struct mem_node *y; | |
3642 | ||
3643 | /* Turn y's left sub-tree into x's right sub-tree. */ | |
3644 | y = x->right; | |
3645 | x->right = y->left; | |
3646 | if (y->left != MEM_NIL) | |
3647 | y->left->parent = x; | |
3648 | ||
3649 | /* Y's parent was x's parent. */ | |
3650 | if (y != MEM_NIL) | |
3651 | y->parent = x->parent; | |
3652 | ||
3653 | /* Get the parent to point to y instead of x. */ | |
3654 | if (x->parent) | |
3655 | { | |
3656 | if (x == x->parent->left) | |
3657 | x->parent->left = y; | |
3658 | else | |
3659 | x->parent->right = y; | |
3660 | } | |
3661 | else | |
3662 | mem_root = y; | |
3663 | ||
3664 | /* Put x on y's left. */ | |
3665 | y->left = x; | |
3666 | if (x != MEM_NIL) | |
3667 | x->parent = y; | |
3668 | } | |
3669 | ||
3670 | ||
177c0ea7 JB |
3671 | /* (x) (Y) |
3672 | / \ / \ | |
3673 | (y) c ===> a (x) | |
3674 | / \ / \ | |
34400008 GM |
3675 | a b b c */ |
3676 | ||
3677 | static void | |
971de7fb | 3678 | mem_rotate_right (struct mem_node *x) |
34400008 GM |
3679 | { |
3680 | struct mem_node *y = x->left; | |
3681 | ||
3682 | x->left = y->right; | |
3683 | if (y->right != MEM_NIL) | |
3684 | y->right->parent = x; | |
177c0ea7 | 3685 | |
34400008 GM |
3686 | if (y != MEM_NIL) |
3687 | y->parent = x->parent; | |
3688 | if (x->parent) | |
3689 | { | |
3690 | if (x == x->parent->right) | |
3691 | x->parent->right = y; | |
3692 | else | |
3693 | x->parent->left = y; | |
3694 | } | |
3695 | else | |
3696 | mem_root = y; | |
177c0ea7 | 3697 | |
34400008 GM |
3698 | y->right = x; |
3699 | if (x != MEM_NIL) | |
3700 | x->parent = y; | |
3701 | } | |
3702 | ||
3703 | ||
3704 | /* Delete node Z from the tree. If Z is null or MEM_NIL, do nothing. */ | |
3705 | ||
3706 | static void | |
971de7fb | 3707 | mem_delete (struct mem_node *z) |
34400008 GM |
3708 | { |
3709 | struct mem_node *x, *y; | |
3710 | ||
3711 | if (!z || z == MEM_NIL) | |
3712 | return; | |
3713 | ||
3714 | if (z->left == MEM_NIL || z->right == MEM_NIL) | |
3715 | y = z; | |
3716 | else | |
3717 | { | |
3718 | y = z->right; | |
3719 | while (y->left != MEM_NIL) | |
3720 | y = y->left; | |
3721 | } | |
3722 | ||
3723 | if (y->left != MEM_NIL) | |
3724 | x = y->left; | |
3725 | else | |
3726 | x = y->right; | |
3727 | ||
3728 | x->parent = y->parent; | |
3729 | if (y->parent) | |
3730 | { | |
3731 | if (y == y->parent->left) | |
3732 | y->parent->left = x; | |
3733 | else | |
3734 | y->parent->right = x; | |
3735 | } | |
3736 | else | |
3737 | mem_root = x; | |
3738 | ||
3739 | if (y != z) | |
3740 | { | |
3741 | z->start = y->start; | |
3742 | z->end = y->end; | |
3743 | z->type = y->type; | |
3744 | } | |
177c0ea7 | 3745 | |
34400008 GM |
3746 | if (y->color == MEM_BLACK) |
3747 | mem_delete_fixup (x); | |
877935b1 GM |
3748 | |
3749 | #ifdef GC_MALLOC_CHECK | |
3750 | _free_internal (y); | |
3751 | #else | |
34400008 | 3752 | xfree (y); |
877935b1 | 3753 | #endif |
34400008 GM |
3754 | } |
3755 | ||
3756 | ||
3757 | /* Re-establish the red-black properties of the tree, after a | |
3758 | deletion. */ | |
3759 | ||
3760 | static void | |
971de7fb | 3761 | mem_delete_fixup (struct mem_node *x) |
34400008 GM |
3762 | { |
3763 | while (x != mem_root && x->color == MEM_BLACK) | |
3764 | { | |
3765 | if (x == x->parent->left) | |
3766 | { | |
3767 | struct mem_node *w = x->parent->right; | |
177c0ea7 | 3768 | |
34400008 GM |
3769 | if (w->color == MEM_RED) |
3770 | { | |
3771 | w->color = MEM_BLACK; | |
3772 | x->parent->color = MEM_RED; | |
3773 | mem_rotate_left (x->parent); | |
3774 | w = x->parent->right; | |
3775 | } | |
177c0ea7 | 3776 | |
34400008 GM |
3777 | if (w->left->color == MEM_BLACK && w->right->color == MEM_BLACK) |
3778 | { | |
3779 | w->color = MEM_RED; | |
3780 | x = x->parent; | |
3781 | } | |
3782 | else | |
3783 | { | |
3784 | if (w->right->color == MEM_BLACK) | |
3785 | { | |
3786 | w->left->color = MEM_BLACK; | |
3787 | w->color = MEM_RED; | |
3788 | mem_rotate_right (w); | |
3789 | w = x->parent->right; | |
3790 | } | |
3791 | w->color = x->parent->color; | |
3792 | x->parent->color = MEM_BLACK; | |
3793 | w->right->color = MEM_BLACK; | |
3794 | mem_rotate_left (x->parent); | |
3795 | x = mem_root; | |
3796 | } | |
3797 | } | |
3798 | else | |
3799 | { | |
3800 | struct mem_node *w = x->parent->left; | |
177c0ea7 | 3801 | |
34400008 GM |
3802 | if (w->color == MEM_RED) |
3803 | { | |
3804 | w->color = MEM_BLACK; | |
3805 | x->parent->color = MEM_RED; | |
3806 | mem_rotate_right (x->parent); | |
3807 | w = x->parent->left; | |
3808 | } | |
177c0ea7 | 3809 | |
34400008 GM |
3810 | if (w->right->color == MEM_BLACK && w->left->color == MEM_BLACK) |
3811 | { | |
3812 | w->color = MEM_RED; | |
3813 | x = x->parent; | |
3814 | } | |
3815 | else | |
3816 | { | |
3817 | if (w->left->color == MEM_BLACK) | |
3818 | { | |
3819 | w->right->color = MEM_BLACK; | |
3820 | w->color = MEM_RED; | |
3821 | mem_rotate_left (w); | |
3822 | w = x->parent->left; | |
3823 | } | |
177c0ea7 | 3824 | |
34400008 GM |
3825 | w->color = x->parent->color; |
3826 | x->parent->color = MEM_BLACK; | |
3827 | w->left->color = MEM_BLACK; | |
3828 | mem_rotate_right (x->parent); | |
3829 | x = mem_root; | |
3830 | } | |
3831 | } | |
3832 | } | |
177c0ea7 | 3833 | |
34400008 GM |
3834 | x->color = MEM_BLACK; |
3835 | } | |
3836 | ||
3837 | ||
3838 | /* Value is non-zero if P is a pointer to a live Lisp string on | |
3839 | the heap. M is a pointer to the mem_block for P. */ | |
3840 | ||
3841 | static INLINE int | |
971de7fb | 3842 | live_string_p (struct mem_node *m, void *p) |
34400008 GM |
3843 | { |
3844 | if (m->type == MEM_TYPE_STRING) | |
3845 | { | |
3846 | struct string_block *b = (struct string_block *) m->start; | |
14162469 | 3847 | ptrdiff_t offset = (char *) p - (char *) &b->strings[0]; |
34400008 GM |
3848 | |
3849 | /* P must point to the start of a Lisp_String structure, and it | |
3850 | must not be on the free-list. */ | |
176bc847 GM |
3851 | return (offset >= 0 |
3852 | && offset % sizeof b->strings[0] == 0 | |
6b61353c | 3853 | && offset < (STRING_BLOCK_SIZE * sizeof b->strings[0]) |
34400008 GM |
3854 | && ((struct Lisp_String *) p)->data != NULL); |
3855 | } | |
3856 | else | |
3857 | return 0; | |
3858 | } | |
3859 | ||
3860 | ||
3861 | /* Value is non-zero if P is a pointer to a live Lisp cons on | |
3862 | the heap. M is a pointer to the mem_block for P. */ | |
3863 | ||
3864 | static INLINE int | |
971de7fb | 3865 | live_cons_p (struct mem_node *m, void *p) |
34400008 GM |
3866 | { |
3867 | if (m->type == MEM_TYPE_CONS) | |
3868 | { | |
3869 | struct cons_block *b = (struct cons_block *) m->start; | |
14162469 | 3870 | ptrdiff_t offset = (char *) p - (char *) &b->conses[0]; |
34400008 GM |
3871 | |
3872 | /* P must point to the start of a Lisp_Cons, not be | |
3873 | one of the unused cells in the current cons block, | |
3874 | and not be on the free-list. */ | |
176bc847 GM |
3875 | return (offset >= 0 |
3876 | && offset % sizeof b->conses[0] == 0 | |
6b61353c | 3877 | && offset < (CONS_BLOCK_SIZE * sizeof b->conses[0]) |
34400008 GM |
3878 | && (b != cons_block |
3879 | || offset / sizeof b->conses[0] < cons_block_index) | |
3880 | && !EQ (((struct Lisp_Cons *) p)->car, Vdead)); | |
3881 | } | |
3882 | else | |
3883 | return 0; | |
3884 | } | |
3885 | ||
3886 | ||
3887 | /* Value is non-zero if P is a pointer to a live Lisp symbol on | |
3888 | the heap. M is a pointer to the mem_block for P. */ | |
3889 | ||
3890 | static INLINE int | |
971de7fb | 3891 | live_symbol_p (struct mem_node *m, void *p) |
34400008 GM |
3892 | { |
3893 | if (m->type == MEM_TYPE_SYMBOL) | |
3894 | { | |
3895 | struct symbol_block *b = (struct symbol_block *) m->start; | |
14162469 | 3896 | ptrdiff_t offset = (char *) p - (char *) &b->symbols[0]; |
177c0ea7 | 3897 | |
34400008 GM |
3898 | /* P must point to the start of a Lisp_Symbol, not be |
3899 | one of the unused cells in the current symbol block, | |
3900 | and not be on the free-list. */ | |
176bc847 GM |
3901 | return (offset >= 0 |
3902 | && offset % sizeof b->symbols[0] == 0 | |
6b61353c | 3903 | && offset < (SYMBOL_BLOCK_SIZE * sizeof b->symbols[0]) |
34400008 GM |
3904 | && (b != symbol_block |
3905 | || offset / sizeof b->symbols[0] < symbol_block_index) | |
3906 | && !EQ (((struct Lisp_Symbol *) p)->function, Vdead)); | |
3907 | } | |
3908 | else | |
3909 | return 0; | |
3910 | } | |
3911 | ||
3912 | ||
3913 | /* Value is non-zero if P is a pointer to a live Lisp float on | |
3914 | the heap. M is a pointer to the mem_block for P. */ | |
3915 | ||
3916 | static INLINE int | |
971de7fb | 3917 | live_float_p (struct mem_node *m, void *p) |
34400008 GM |
3918 | { |
3919 | if (m->type == MEM_TYPE_FLOAT) | |
3920 | { | |
3921 | struct float_block *b = (struct float_block *) m->start; | |
14162469 | 3922 | ptrdiff_t offset = (char *) p - (char *) &b->floats[0]; |
177c0ea7 | 3923 | |
ab6780cd SM |
3924 | /* P must point to the start of a Lisp_Float and not be |
3925 | one of the unused cells in the current float block. */ | |
176bc847 GM |
3926 | return (offset >= 0 |
3927 | && offset % sizeof b->floats[0] == 0 | |
6b61353c | 3928 | && offset < (FLOAT_BLOCK_SIZE * sizeof b->floats[0]) |
34400008 | 3929 | && (b != float_block |
ab6780cd | 3930 | || offset / sizeof b->floats[0] < float_block_index)); |
34400008 GM |
3931 | } |
3932 | else | |
3933 | return 0; | |
3934 | } | |
3935 | ||
3936 | ||
3937 | /* Value is non-zero if P is a pointer to a live Lisp Misc on | |
3938 | the heap. M is a pointer to the mem_block for P. */ | |
3939 | ||
3940 | static INLINE int | |
971de7fb | 3941 | live_misc_p (struct mem_node *m, void *p) |
34400008 GM |
3942 | { |
3943 | if (m->type == MEM_TYPE_MISC) | |
3944 | { | |
3945 | struct marker_block *b = (struct marker_block *) m->start; | |
14162469 | 3946 | ptrdiff_t offset = (char *) p - (char *) &b->markers[0]; |
177c0ea7 | 3947 | |
34400008 GM |
3948 | /* P must point to the start of a Lisp_Misc, not be |
3949 | one of the unused cells in the current misc block, | |
3950 | and not be on the free-list. */ | |
176bc847 GM |
3951 | return (offset >= 0 |
3952 | && offset % sizeof b->markers[0] == 0 | |
6b61353c | 3953 | && offset < (MARKER_BLOCK_SIZE * sizeof b->markers[0]) |
34400008 GM |
3954 | && (b != marker_block |
3955 | || offset / sizeof b->markers[0] < marker_block_index) | |
d314756e | 3956 | && ((union Lisp_Misc *) p)->u_any.type != Lisp_Misc_Free); |
34400008 GM |
3957 | } |
3958 | else | |
3959 | return 0; | |
3960 | } | |
3961 | ||
3962 | ||
3963 | /* Value is non-zero if P is a pointer to a live vector-like object. | |
3964 | M is a pointer to the mem_block for P. */ | |
3965 | ||
3966 | static INLINE int | |
971de7fb | 3967 | live_vector_p (struct mem_node *m, void *p) |
34400008 | 3968 | { |
9c545a55 | 3969 | return (p == m->start && m->type == MEM_TYPE_VECTORLIKE); |
34400008 GM |
3970 | } |
3971 | ||
3972 | ||
2336fe58 | 3973 | /* Value is non-zero if P is a pointer to a live buffer. M is a |
34400008 GM |
3974 | pointer to the mem_block for P. */ |
3975 | ||
3976 | static INLINE int | |
971de7fb | 3977 | live_buffer_p (struct mem_node *m, void *p) |
34400008 GM |
3978 | { |
3979 | /* P must point to the start of the block, and the buffer | |
3980 | must not have been killed. */ | |
3981 | return (m->type == MEM_TYPE_BUFFER | |
3982 | && p == m->start | |
3983 | && !NILP (((struct buffer *) p)->name)); | |
3984 | } | |
3985 | ||
13c844fb GM |
3986 | #endif /* GC_MARK_STACK || defined GC_MALLOC_CHECK */ |
3987 | ||
3988 | #if GC_MARK_STACK | |
3989 | ||
34400008 GM |
3990 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
3991 | ||
3992 | /* Array of objects that are kept alive because the C stack contains | |
3993 | a pattern that looks like a reference to them . */ | |
3994 | ||
3995 | #define MAX_ZOMBIES 10 | |
3996 | static Lisp_Object zombies[MAX_ZOMBIES]; | |
3997 | ||
3998 | /* Number of zombie objects. */ | |
3999 | ||
4000 | static int nzombies; | |
4001 | ||
4002 | /* Number of garbage collections. */ | |
4003 | ||
4004 | static int ngcs; | |
4005 | ||
4006 | /* Average percentage of zombies per collection. */ | |
4007 | ||
4008 | static double avg_zombies; | |
4009 | ||
4010 | /* Max. number of live and zombie objects. */ | |
4011 | ||
4012 | static int max_live, max_zombies; | |
4013 | ||
4014 | /* Average number of live objects per GC. */ | |
4015 | ||
4016 | static double avg_live; | |
4017 | ||
4018 | DEFUN ("gc-status", Fgc_status, Sgc_status, 0, 0, "", | |
7ee72033 | 4019 | doc: /* Show information about live and zombie objects. */) |
5842a27b | 4020 | (void) |
34400008 | 4021 | { |
83fc9c63 DL |
4022 | Lisp_Object args[8], zombie_list = Qnil; |
4023 | int i; | |
4024 | for (i = 0; i < nzombies; i++) | |
4025 | zombie_list = Fcons (zombies[i], zombie_list); | |
4026 | args[0] = build_string ("%d GCs, avg live/zombies = %.2f/%.2f (%f%%), max %d/%d\nzombies: %S"); | |
34400008 GM |
4027 | args[1] = make_number (ngcs); |
4028 | args[2] = make_float (avg_live); | |
4029 | args[3] = make_float (avg_zombies); | |
4030 | args[4] = make_float (avg_zombies / avg_live / 100); | |
4031 | args[5] = make_number (max_live); | |
4032 | args[6] = make_number (max_zombies); | |
83fc9c63 DL |
4033 | args[7] = zombie_list; |
4034 | return Fmessage (8, args); | |
34400008 GM |
4035 | } |
4036 | ||
4037 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
4038 | ||
4039 | ||
182ff242 GM |
4040 | /* Mark OBJ if we can prove it's a Lisp_Object. */ |
4041 | ||
4042 | static INLINE void | |
971de7fb | 4043 | mark_maybe_object (Lisp_Object obj) |
182ff242 | 4044 | { |
b609f591 YM |
4045 | void *po; |
4046 | struct mem_node *m; | |
4047 | ||
4048 | if (INTEGERP (obj)) | |
4049 | return; | |
4050 | ||
4051 | po = (void *) XPNTR (obj); | |
4052 | m = mem_find (po); | |
177c0ea7 | 4053 | |
182ff242 GM |
4054 | if (m != MEM_NIL) |
4055 | { | |
4056 | int mark_p = 0; | |
4057 | ||
8e50cc2d | 4058 | switch (XTYPE (obj)) |
182ff242 GM |
4059 | { |
4060 | case Lisp_String: | |
4061 | mark_p = (live_string_p (m, po) | |
4062 | && !STRING_MARKED_P ((struct Lisp_String *) po)); | |
4063 | break; | |
4064 | ||
4065 | case Lisp_Cons: | |
08b7c2cb | 4066 | mark_p = (live_cons_p (m, po) && !CONS_MARKED_P (XCONS (obj))); |
182ff242 GM |
4067 | break; |
4068 | ||
4069 | case Lisp_Symbol: | |
2336fe58 | 4070 | mark_p = (live_symbol_p (m, po) && !XSYMBOL (obj)->gcmarkbit); |
182ff242 GM |
4071 | break; |
4072 | ||
4073 | case Lisp_Float: | |
ab6780cd | 4074 | mark_p = (live_float_p (m, po) && !FLOAT_MARKED_P (XFLOAT (obj))); |
182ff242 GM |
4075 | break; |
4076 | ||
4077 | case Lisp_Vectorlike: | |
8e50cc2d | 4078 | /* Note: can't check BUFFERP before we know it's a |
182ff242 GM |
4079 | buffer because checking that dereferences the pointer |
4080 | PO which might point anywhere. */ | |
4081 | if (live_vector_p (m, po)) | |
8e50cc2d | 4082 | mark_p = !SUBRP (obj) && !VECTOR_MARKED_P (XVECTOR (obj)); |
182ff242 | 4083 | else if (live_buffer_p (m, po)) |
8e50cc2d | 4084 | mark_p = BUFFERP (obj) && !VECTOR_MARKED_P (XBUFFER (obj)); |
182ff242 GM |
4085 | break; |
4086 | ||
4087 | case Lisp_Misc: | |
67ee9f6e | 4088 | mark_p = (live_misc_p (m, po) && !XMISCANY (obj)->gcmarkbit); |
182ff242 | 4089 | break; |
6bbd7a29 | 4090 | |
2de9f71c | 4091 | default: |
6bbd7a29 | 4092 | break; |
182ff242 GM |
4093 | } |
4094 | ||
4095 | if (mark_p) | |
4096 | { | |
4097 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4098 | if (nzombies < MAX_ZOMBIES) | |
83fc9c63 | 4099 | zombies[nzombies] = obj; |
182ff242 GM |
4100 | ++nzombies; |
4101 | #endif | |
49723c04 | 4102 | mark_object (obj); |
182ff242 GM |
4103 | } |
4104 | } | |
4105 | } | |
ece93c02 GM |
4106 | |
4107 | ||
4108 | /* If P points to Lisp data, mark that as live if it isn't already | |
4109 | marked. */ | |
4110 | ||
4111 | static INLINE void | |
971de7fb | 4112 | mark_maybe_pointer (void *p) |
ece93c02 GM |
4113 | { |
4114 | struct mem_node *m; | |
4115 | ||
5045e68e SM |
4116 | /* Quickly rule out some values which can't point to Lisp data. */ |
4117 | if ((EMACS_INT) p % | |
4118 | #ifdef USE_LSB_TAG | |
4119 | 8 /* USE_LSB_TAG needs Lisp data to be aligned on multiples of 8. */ | |
4120 | #else | |
4121 | 2 /* We assume that Lisp data is aligned on even addresses. */ | |
4122 | #endif | |
4123 | ) | |
ece93c02 | 4124 | return; |
177c0ea7 | 4125 | |
ece93c02 GM |
4126 | m = mem_find (p); |
4127 | if (m != MEM_NIL) | |
4128 | { | |
4129 | Lisp_Object obj = Qnil; | |
177c0ea7 | 4130 | |
ece93c02 GM |
4131 | switch (m->type) |
4132 | { | |
4133 | case MEM_TYPE_NON_LISP: | |
2fe50224 | 4134 | /* Nothing to do; not a pointer to Lisp memory. */ |
ece93c02 | 4135 | break; |
177c0ea7 | 4136 | |
ece93c02 | 4137 | case MEM_TYPE_BUFFER: |
3ef06d12 | 4138 | if (live_buffer_p (m, p) && !VECTOR_MARKED_P((struct buffer *)p)) |
ece93c02 GM |
4139 | XSETVECTOR (obj, p); |
4140 | break; | |
177c0ea7 | 4141 | |
ece93c02 | 4142 | case MEM_TYPE_CONS: |
08b7c2cb | 4143 | if (live_cons_p (m, p) && !CONS_MARKED_P ((struct Lisp_Cons *) p)) |
ece93c02 GM |
4144 | XSETCONS (obj, p); |
4145 | break; | |
177c0ea7 | 4146 | |
ece93c02 GM |
4147 | case MEM_TYPE_STRING: |
4148 | if (live_string_p (m, p) | |
4149 | && !STRING_MARKED_P ((struct Lisp_String *) p)) | |
4150 | XSETSTRING (obj, p); | |
4151 | break; | |
4152 | ||
4153 | case MEM_TYPE_MISC: | |
2336fe58 SM |
4154 | if (live_misc_p (m, p) && !((struct Lisp_Free *) p)->gcmarkbit) |
4155 | XSETMISC (obj, p); | |
ece93c02 | 4156 | break; |
177c0ea7 | 4157 | |
ece93c02 | 4158 | case MEM_TYPE_SYMBOL: |
2336fe58 | 4159 | if (live_symbol_p (m, p) && !((struct Lisp_Symbol *) p)->gcmarkbit) |
ece93c02 GM |
4160 | XSETSYMBOL (obj, p); |
4161 | break; | |
177c0ea7 | 4162 | |
ece93c02 | 4163 | case MEM_TYPE_FLOAT: |
ab6780cd | 4164 | if (live_float_p (m, p) && !FLOAT_MARKED_P (p)) |
ece93c02 GM |
4165 | XSETFLOAT (obj, p); |
4166 | break; | |
177c0ea7 | 4167 | |
9c545a55 | 4168 | case MEM_TYPE_VECTORLIKE: |
ece93c02 GM |
4169 | if (live_vector_p (m, p)) |
4170 | { | |
4171 | Lisp_Object tem; | |
4172 | XSETVECTOR (tem, p); | |
8e50cc2d | 4173 | if (!SUBRP (tem) && !VECTOR_MARKED_P (XVECTOR (tem))) |
ece93c02 GM |
4174 | obj = tem; |
4175 | } | |
4176 | break; | |
4177 | ||
4178 | default: | |
4179 | abort (); | |
4180 | } | |
4181 | ||
8e50cc2d | 4182 | if (!NILP (obj)) |
49723c04 | 4183 | mark_object (obj); |
ece93c02 GM |
4184 | } |
4185 | } | |
4186 | ||
4187 | ||
55a314a5 YM |
4188 | /* Mark Lisp objects referenced from the address range START+OFFSET..END |
4189 | or END+OFFSET..START. */ | |
34400008 | 4190 | |
177c0ea7 | 4191 | static void |
971de7fb | 4192 | mark_memory (void *start, void *end, int offset) |
34400008 GM |
4193 | { |
4194 | Lisp_Object *p; | |
ece93c02 | 4195 | void **pp; |
34400008 GM |
4196 | |
4197 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4198 | nzombies = 0; | |
4199 | #endif | |
4200 | ||
4201 | /* Make START the pointer to the start of the memory region, | |
4202 | if it isn't already. */ | |
4203 | if (end < start) | |
4204 | { | |
4205 | void *tem = start; | |
4206 | start = end; | |
4207 | end = tem; | |
4208 | } | |
ece93c02 GM |
4209 | |
4210 | /* Mark Lisp_Objects. */ | |
55a314a5 | 4211 | for (p = (Lisp_Object *) ((char *) start + offset); (void *) p < end; ++p) |
182ff242 | 4212 | mark_maybe_object (*p); |
ece93c02 GM |
4213 | |
4214 | /* Mark Lisp data pointed to. This is necessary because, in some | |
4215 | situations, the C compiler optimizes Lisp objects away, so that | |
4216 | only a pointer to them remains. Example: | |
4217 | ||
4218 | DEFUN ("testme", Ftestme, Stestme, 0, 0, 0, "") | |
7ee72033 | 4219 | () |
ece93c02 GM |
4220 | { |
4221 | Lisp_Object obj = build_string ("test"); | |
4222 | struct Lisp_String *s = XSTRING (obj); | |
4223 | Fgarbage_collect (); | |
4224 | fprintf (stderr, "test `%s'\n", s->data); | |
4225 | return Qnil; | |
4226 | } | |
4227 | ||
4228 | Here, `obj' isn't really used, and the compiler optimizes it | |
4229 | away. The only reference to the life string is through the | |
4230 | pointer `s'. */ | |
177c0ea7 | 4231 | |
55a314a5 | 4232 | for (pp = (void **) ((char *) start + offset); (void *) pp < end; ++pp) |
ece93c02 | 4233 | mark_maybe_pointer (*pp); |
182ff242 GM |
4234 | } |
4235 | ||
30f637f8 DL |
4236 | /* setjmp will work with GCC unless NON_SAVING_SETJMP is defined in |
4237 | the GCC system configuration. In gcc 3.2, the only systems for | |
4238 | which this is so are i386-sco5 non-ELF, i386-sysv3 (maybe included | |
4239 | by others?) and ns32k-pc532-min. */ | |
182ff242 GM |
4240 | |
4241 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
4242 | ||
4243 | static int setjmp_tested_p, longjmps_done; | |
4244 | ||
4245 | #define SETJMP_WILL_LIKELY_WORK "\ | |
4246 | \n\ | |
4247 | Emacs garbage collector has been changed to use conservative stack\n\ | |
4248 | marking. Emacs has determined that the method it uses to do the\n\ | |
4249 | marking will likely work on your system, but this isn't sure.\n\ | |
4250 | \n\ | |
4251 | If you are a system-programmer, or can get the help of a local wizard\n\ | |
4252 | who is, please take a look at the function mark_stack in alloc.c, and\n\ | |
4253 | verify that the methods used are appropriate for your system.\n\ | |
4254 | \n\ | |
d191623b | 4255 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
4256 | " |
4257 | ||
4258 | #define SETJMP_WILL_NOT_WORK "\ | |
4259 | \n\ | |
4260 | Emacs garbage collector has been changed to use conservative stack\n\ | |
4261 | marking. Emacs has determined that the default method it uses to do the\n\ | |
4262 | marking will not work on your system. We will need a system-dependent\n\ | |
4263 | solution for your system.\n\ | |
4264 | \n\ | |
4265 | Please take a look at the function mark_stack in alloc.c, and\n\ | |
4266 | try to find a way to make it work on your system.\n\ | |
30f637f8 DL |
4267 | \n\ |
4268 | Note that you may get false negatives, depending on the compiler.\n\ | |
4269 | In particular, you need to use -O with GCC for this test.\n\ | |
4270 | \n\ | |
d191623b | 4271 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
4272 | " |
4273 | ||
4274 | ||
4275 | /* Perform a quick check if it looks like setjmp saves registers in a | |
4276 | jmp_buf. Print a message to stderr saying so. When this test | |
4277 | succeeds, this is _not_ a proof that setjmp is sufficient for | |
4278 | conservative stack marking. Only the sources or a disassembly | |
4279 | can prove that. */ | |
4280 | ||
4281 | static void | |
4282 | test_setjmp () | |
4283 | { | |
4284 | char buf[10]; | |
4285 | register int x; | |
4286 | jmp_buf jbuf; | |
4287 | int result = 0; | |
4288 | ||
4289 | /* Arrange for X to be put in a register. */ | |
4290 | sprintf (buf, "1"); | |
4291 | x = strlen (buf); | |
4292 | x = 2 * x - 1; | |
4293 | ||
4294 | setjmp (jbuf); | |
4295 | if (longjmps_done == 1) | |
34400008 | 4296 | { |
182ff242 | 4297 | /* Came here after the longjmp at the end of the function. |
34400008 | 4298 | |
182ff242 GM |
4299 | If x == 1, the longjmp has restored the register to its |
4300 | value before the setjmp, and we can hope that setjmp | |
4301 | saves all such registers in the jmp_buf, although that | |
4302 | isn't sure. | |
34400008 | 4303 | |
182ff242 GM |
4304 | For other values of X, either something really strange is |
4305 | taking place, or the setjmp just didn't save the register. */ | |
4306 | ||
4307 | if (x == 1) | |
4308 | fprintf (stderr, SETJMP_WILL_LIKELY_WORK); | |
4309 | else | |
4310 | { | |
4311 | fprintf (stderr, SETJMP_WILL_NOT_WORK); | |
4312 | exit (1); | |
34400008 GM |
4313 | } |
4314 | } | |
182ff242 GM |
4315 | |
4316 | ++longjmps_done; | |
4317 | x = 2; | |
4318 | if (longjmps_done == 1) | |
4319 | longjmp (jbuf, 1); | |
34400008 GM |
4320 | } |
4321 | ||
182ff242 GM |
4322 | #endif /* not GC_SAVE_REGISTERS_ON_STACK && not GC_SETJMP_WORKS */ |
4323 | ||
34400008 GM |
4324 | |
4325 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
4326 | ||
4327 | /* Abort if anything GCPRO'd doesn't survive the GC. */ | |
4328 | ||
4329 | static void | |
4330 | check_gcpros () | |
4331 | { | |
4332 | struct gcpro *p; | |
4333 | int i; | |
4334 | ||
4335 | for (p = gcprolist; p; p = p->next) | |
4336 | for (i = 0; i < p->nvars; ++i) | |
4337 | if (!survives_gc_p (p->var[i])) | |
92cc28b2 SM |
4338 | /* FIXME: It's not necessarily a bug. It might just be that the |
4339 | GCPRO is unnecessary or should release the object sooner. */ | |
34400008 GM |
4340 | abort (); |
4341 | } | |
4342 | ||
4343 | #elif GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4344 | ||
4345 | static void | |
4346 | dump_zombies () | |
4347 | { | |
4348 | int i; | |
4349 | ||
4350 | fprintf (stderr, "\nZombies kept alive = %d:\n", nzombies); | |
4351 | for (i = 0; i < min (MAX_ZOMBIES, nzombies); ++i) | |
4352 | { | |
4353 | fprintf (stderr, " %d = ", i); | |
4354 | debug_print (zombies[i]); | |
4355 | } | |
4356 | } | |
4357 | ||
4358 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
4359 | ||
4360 | ||
182ff242 GM |
4361 | /* Mark live Lisp objects on the C stack. |
4362 | ||
4363 | There are several system-dependent problems to consider when | |
4364 | porting this to new architectures: | |
4365 | ||
4366 | Processor Registers | |
4367 | ||
4368 | We have to mark Lisp objects in CPU registers that can hold local | |
4369 | variables or are used to pass parameters. | |
4370 | ||
4371 | If GC_SAVE_REGISTERS_ON_STACK is defined, it should expand to | |
4372 | something that either saves relevant registers on the stack, or | |
4373 | calls mark_maybe_object passing it each register's contents. | |
4374 | ||
4375 | If GC_SAVE_REGISTERS_ON_STACK is not defined, the current | |
4376 | implementation assumes that calling setjmp saves registers we need | |
4377 | to see in a jmp_buf which itself lies on the stack. This doesn't | |
4378 | have to be true! It must be verified for each system, possibly | |
4379 | by taking a look at the source code of setjmp. | |
4380 | ||
4381 | Stack Layout | |
4382 | ||
4383 | Architectures differ in the way their processor stack is organized. | |
4384 | For example, the stack might look like this | |
4385 | ||
4386 | +----------------+ | |
4387 | | Lisp_Object | size = 4 | |
4388 | +----------------+ | |
4389 | | something else | size = 2 | |
4390 | +----------------+ | |
4391 | | Lisp_Object | size = 4 | |
4392 | +----------------+ | |
4393 | | ... | | |
4394 | ||
4395 | In such a case, not every Lisp_Object will be aligned equally. To | |
4396 | find all Lisp_Object on the stack it won't be sufficient to walk | |
4397 | the stack in steps of 4 bytes. Instead, two passes will be | |
4398 | necessary, one starting at the start of the stack, and a second | |
4399 | pass starting at the start of the stack + 2. Likewise, if the | |
4400 | minimal alignment of Lisp_Objects on the stack is 1, four passes | |
4401 | would be necessary, each one starting with one byte more offset | |
4402 | from the stack start. | |
4403 | ||
4404 | The current code assumes by default that Lisp_Objects are aligned | |
4405 | equally on the stack. */ | |
34400008 GM |
4406 | |
4407 | static void | |
971de7fb | 4408 | mark_stack (void) |
34400008 | 4409 | { |
630909a5 | 4410 | int i; |
55a314a5 YM |
4411 | /* jmp_buf may not be aligned enough on darwin-ppc64 */ |
4412 | union aligned_jmpbuf { | |
4413 | Lisp_Object o; | |
4414 | jmp_buf j; | |
4415 | } j; | |
6bbd7a29 | 4416 | volatile int stack_grows_down_p = (char *) &j > (char *) stack_base; |
34400008 GM |
4417 | void *end; |
4418 | ||
4419 | /* This trick flushes the register windows so that all the state of | |
4420 | the process is contained in the stack. */ | |
ab6780cd | 4421 | /* Fixme: Code in the Boehm GC suggests flushing (with `flushrs') is |
422eec7e DL |
4422 | needed on ia64 too. See mach_dep.c, where it also says inline |
4423 | assembler doesn't work with relevant proprietary compilers. */ | |
4a00783e | 4424 | #ifdef __sparc__ |
4d18a7a2 DN |
4425 | #if defined (__sparc64__) && defined (__FreeBSD__) |
4426 | /* FreeBSD does not have a ta 3 handler. */ | |
4c1616be CY |
4427 | asm ("flushw"); |
4428 | #else | |
34400008 | 4429 | asm ("ta 3"); |
4c1616be | 4430 | #endif |
34400008 | 4431 | #endif |
177c0ea7 | 4432 | |
34400008 GM |
4433 | /* Save registers that we need to see on the stack. We need to see |
4434 | registers used to hold register variables and registers used to | |
4435 | pass parameters. */ | |
4436 | #ifdef GC_SAVE_REGISTERS_ON_STACK | |
4437 | GC_SAVE_REGISTERS_ON_STACK (end); | |
182ff242 | 4438 | #else /* not GC_SAVE_REGISTERS_ON_STACK */ |
177c0ea7 | 4439 | |
182ff242 GM |
4440 | #ifndef GC_SETJMP_WORKS /* If it hasn't been checked yet that |
4441 | setjmp will definitely work, test it | |
4442 | and print a message with the result | |
4443 | of the test. */ | |
4444 | if (!setjmp_tested_p) | |
4445 | { | |
4446 | setjmp_tested_p = 1; | |
4447 | test_setjmp (); | |
4448 | } | |
4449 | #endif /* GC_SETJMP_WORKS */ | |
177c0ea7 | 4450 | |
55a314a5 | 4451 | setjmp (j.j); |
34400008 | 4452 | end = stack_grows_down_p ? (char *) &j + sizeof j : (char *) &j; |
182ff242 | 4453 | #endif /* not GC_SAVE_REGISTERS_ON_STACK */ |
34400008 GM |
4454 | |
4455 | /* This assumes that the stack is a contiguous region in memory. If | |
182ff242 GM |
4456 | that's not the case, something has to be done here to iterate |
4457 | over the stack segments. */ | |
630909a5 | 4458 | #ifndef GC_LISP_OBJECT_ALIGNMENT |
422eec7e DL |
4459 | #ifdef __GNUC__ |
4460 | #define GC_LISP_OBJECT_ALIGNMENT __alignof__ (Lisp_Object) | |
4461 | #else | |
630909a5 | 4462 | #define GC_LISP_OBJECT_ALIGNMENT sizeof (Lisp_Object) |
422eec7e | 4463 | #endif |
182ff242 | 4464 | #endif |
24452cd5 | 4465 | for (i = 0; i < sizeof (Lisp_Object); i += GC_LISP_OBJECT_ALIGNMENT) |
55a314a5 | 4466 | mark_memory (stack_base, end, i); |
4dec23ff AS |
4467 | /* Allow for marking a secondary stack, like the register stack on the |
4468 | ia64. */ | |
4469 | #ifdef GC_MARK_SECONDARY_STACK | |
4470 | GC_MARK_SECONDARY_STACK (); | |
4471 | #endif | |
34400008 GM |
4472 | |
4473 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
4474 | check_gcpros (); | |
4475 | #endif | |
4476 | } | |
4477 | ||
34400008 GM |
4478 | #endif /* GC_MARK_STACK != 0 */ |
4479 | ||
4480 | ||
7ffb6955 | 4481 | /* Determine whether it is safe to access memory at address P. */ |
d3d47262 | 4482 | static int |
971de7fb | 4483 | valid_pointer_p (void *p) |
7ffb6955 | 4484 | { |
f892cf9c EZ |
4485 | #ifdef WINDOWSNT |
4486 | return w32_valid_pointer_p (p, 16); | |
4487 | #else | |
7ffb6955 KS |
4488 | int fd; |
4489 | ||
4490 | /* Obviously, we cannot just access it (we would SEGV trying), so we | |
4491 | trick the o/s to tell us whether p is a valid pointer. | |
4492 | Unfortunately, we cannot use NULL_DEVICE here, as emacs_write may | |
4493 | not validate p in that case. */ | |
4494 | ||
4495 | if ((fd = emacs_open ("__Valid__Lisp__Object__", O_CREAT | O_WRONLY | O_TRUNC, 0666)) >= 0) | |
4496 | { | |
4497 | int valid = (emacs_write (fd, (char *)p, 16) == 16); | |
4498 | emacs_close (fd); | |
4499 | unlink ("__Valid__Lisp__Object__"); | |
4500 | return valid; | |
4501 | } | |
4502 | ||
4503 | return -1; | |
f892cf9c | 4504 | #endif |
7ffb6955 | 4505 | } |
3cd55735 KS |
4506 | |
4507 | /* Return 1 if OBJ is a valid lisp object. | |
4508 | Return 0 if OBJ is NOT a valid lisp object. | |
4509 | Return -1 if we cannot validate OBJ. | |
7c0ab7d9 RS |
4510 | This function can be quite slow, |
4511 | so it should only be used in code for manual debugging. */ | |
3cd55735 KS |
4512 | |
4513 | int | |
971de7fb | 4514 | valid_lisp_object_p (Lisp_Object obj) |
3cd55735 | 4515 | { |
de7124a7 | 4516 | void *p; |
7ffb6955 | 4517 | #if GC_MARK_STACK |
3cd55735 | 4518 | struct mem_node *m; |
de7124a7 | 4519 | #endif |
3cd55735 KS |
4520 | |
4521 | if (INTEGERP (obj)) | |
4522 | return 1; | |
4523 | ||
4524 | p = (void *) XPNTR (obj); | |
3cd55735 KS |
4525 | if (PURE_POINTER_P (p)) |
4526 | return 1; | |
4527 | ||
de7124a7 | 4528 | #if !GC_MARK_STACK |
7ffb6955 | 4529 | return valid_pointer_p (p); |
de7124a7 KS |
4530 | #else |
4531 | ||
3cd55735 KS |
4532 | m = mem_find (p); |
4533 | ||
4534 | if (m == MEM_NIL) | |
7ffb6955 KS |
4535 | { |
4536 | int valid = valid_pointer_p (p); | |
4537 | if (valid <= 0) | |
4538 | return valid; | |
4539 | ||
4540 | if (SUBRP (obj)) | |
4541 | return 1; | |
4542 | ||
4543 | return 0; | |
4544 | } | |
3cd55735 KS |
4545 | |
4546 | switch (m->type) | |
4547 | { | |
4548 | case MEM_TYPE_NON_LISP: | |
4549 | return 0; | |
4550 | ||
4551 | case MEM_TYPE_BUFFER: | |
4552 | return live_buffer_p (m, p); | |
4553 | ||
4554 | case MEM_TYPE_CONS: | |
4555 | return live_cons_p (m, p); | |
4556 | ||
4557 | case MEM_TYPE_STRING: | |
4558 | return live_string_p (m, p); | |
4559 | ||
4560 | case MEM_TYPE_MISC: | |
4561 | return live_misc_p (m, p); | |
4562 | ||
4563 | case MEM_TYPE_SYMBOL: | |
4564 | return live_symbol_p (m, p); | |
4565 | ||
4566 | case MEM_TYPE_FLOAT: | |
4567 | return live_float_p (m, p); | |
4568 | ||
9c545a55 | 4569 | case MEM_TYPE_VECTORLIKE: |
3cd55735 KS |
4570 | return live_vector_p (m, p); |
4571 | ||
4572 | default: | |
4573 | break; | |
4574 | } | |
4575 | ||
4576 | return 0; | |
4577 | #endif | |
4578 | } | |
4579 | ||
4580 | ||
4581 | ||
34400008 | 4582 | \f |
2e471eb5 GM |
4583 | /*********************************************************************** |
4584 | Pure Storage Management | |
4585 | ***********************************************************************/ | |
4586 | ||
1f0b3fd2 GM |
4587 | /* Allocate room for SIZE bytes from pure Lisp storage and return a |
4588 | pointer to it. TYPE is the Lisp type for which the memory is | |
e5bc14d4 | 4589 | allocated. TYPE < 0 means it's not used for a Lisp object. */ |
1f0b3fd2 GM |
4590 | |
4591 | static POINTER_TYPE * | |
971de7fb | 4592 | pure_alloc (size_t size, int type) |
1f0b3fd2 | 4593 | { |
1f0b3fd2 | 4594 | POINTER_TYPE *result; |
6b61353c KH |
4595 | #ifdef USE_LSB_TAG |
4596 | size_t alignment = (1 << GCTYPEBITS); | |
4597 | #else | |
44117420 | 4598 | size_t alignment = sizeof (EMACS_INT); |
1f0b3fd2 GM |
4599 | |
4600 | /* Give Lisp_Floats an extra alignment. */ | |
4601 | if (type == Lisp_Float) | |
4602 | { | |
1f0b3fd2 GM |
4603 | #if defined __GNUC__ && __GNUC__ >= 2 |
4604 | alignment = __alignof (struct Lisp_Float); | |
4605 | #else | |
4606 | alignment = sizeof (struct Lisp_Float); | |
4607 | #endif | |
9e713715 | 4608 | } |
6b61353c | 4609 | #endif |
1f0b3fd2 | 4610 | |
44117420 | 4611 | again: |
e5bc14d4 YM |
4612 | if (type >= 0) |
4613 | { | |
4614 | /* Allocate space for a Lisp object from the beginning of the free | |
4615 | space with taking account of alignment. */ | |
4616 | result = ALIGN (purebeg + pure_bytes_used_lisp, alignment); | |
4617 | pure_bytes_used_lisp = ((char *)result - (char *)purebeg) + size; | |
4618 | } | |
4619 | else | |
4620 | { | |
4621 | /* Allocate space for a non-Lisp object from the end of the free | |
4622 | space. */ | |
4623 | pure_bytes_used_non_lisp += size; | |
4624 | result = purebeg + pure_size - pure_bytes_used_non_lisp; | |
4625 | } | |
4626 | pure_bytes_used = pure_bytes_used_lisp + pure_bytes_used_non_lisp; | |
44117420 KS |
4627 | |
4628 | if (pure_bytes_used <= pure_size) | |
4629 | return result; | |
4630 | ||
4631 | /* Don't allocate a large amount here, | |
4632 | because it might get mmap'd and then its address | |
4633 | might not be usable. */ | |
4634 | purebeg = (char *) xmalloc (10000); | |
4635 | pure_size = 10000; | |
4636 | pure_bytes_used_before_overflow += pure_bytes_used - size; | |
4637 | pure_bytes_used = 0; | |
e5bc14d4 | 4638 | pure_bytes_used_lisp = pure_bytes_used_non_lisp = 0; |
44117420 | 4639 | goto again; |
1f0b3fd2 GM |
4640 | } |
4641 | ||
4642 | ||
852f8cdc | 4643 | /* Print a warning if PURESIZE is too small. */ |
9e713715 GM |
4644 | |
4645 | void | |
971de7fb | 4646 | check_pure_size (void) |
9e713715 GM |
4647 | { |
4648 | if (pure_bytes_used_before_overflow) | |
2aee5ca3 | 4649 | message ("emacs:0:Pure Lisp storage overflow (approx. %d bytes needed)", |
a4d35afd | 4650 | (int) (pure_bytes_used + pure_bytes_used_before_overflow)); |
9e713715 GM |
4651 | } |
4652 | ||
4653 | ||
79fd0489 YM |
4654 | /* Find the byte sequence {DATA[0], ..., DATA[NBYTES-1], '\0'} from |
4655 | the non-Lisp data pool of the pure storage, and return its start | |
4656 | address. Return NULL if not found. */ | |
4657 | ||
4658 | static char * | |
14162469 | 4659 | find_string_data_in_pure (const char *data, EMACS_INT nbytes) |
79fd0489 | 4660 | { |
14162469 EZ |
4661 | int i; |
4662 | EMACS_INT skip, bm_skip[256], last_char_skip, infinity, start, start_max; | |
2aff7c53 | 4663 | const unsigned char *p; |
79fd0489 YM |
4664 | char *non_lisp_beg; |
4665 | ||
4666 | if (pure_bytes_used_non_lisp < nbytes + 1) | |
4667 | return NULL; | |
4668 | ||
4669 | /* Set up the Boyer-Moore table. */ | |
4670 | skip = nbytes + 1; | |
4671 | for (i = 0; i < 256; i++) | |
4672 | bm_skip[i] = skip; | |
4673 | ||
2aff7c53 | 4674 | p = (const unsigned char *) data; |
79fd0489 YM |
4675 | while (--skip > 0) |
4676 | bm_skip[*p++] = skip; | |
4677 | ||
4678 | last_char_skip = bm_skip['\0']; | |
4679 | ||
4680 | non_lisp_beg = purebeg + pure_size - pure_bytes_used_non_lisp; | |
4681 | start_max = pure_bytes_used_non_lisp - (nbytes + 1); | |
4682 | ||
4683 | /* See the comments in the function `boyer_moore' (search.c) for the | |
4684 | use of `infinity'. */ | |
4685 | infinity = pure_bytes_used_non_lisp + 1; | |
4686 | bm_skip['\0'] = infinity; | |
4687 | ||
2aff7c53 | 4688 | p = (const unsigned char *) non_lisp_beg + nbytes; |
79fd0489 YM |
4689 | start = 0; |
4690 | do | |
4691 | { | |
4692 | /* Check the last character (== '\0'). */ | |
4693 | do | |
4694 | { | |
4695 | start += bm_skip[*(p + start)]; | |
4696 | } | |
4697 | while (start <= start_max); | |
4698 | ||
4699 | if (start < infinity) | |
4700 | /* Couldn't find the last character. */ | |
4701 | return NULL; | |
4702 | ||
4703 | /* No less than `infinity' means we could find the last | |
4704 | character at `p[start - infinity]'. */ | |
4705 | start -= infinity; | |
4706 | ||
4707 | /* Check the remaining characters. */ | |
4708 | if (memcmp (data, non_lisp_beg + start, nbytes) == 0) | |
4709 | /* Found. */ | |
4710 | return non_lisp_beg + start; | |
4711 | ||
4712 | start += last_char_skip; | |
4713 | } | |
4714 | while (start <= start_max); | |
4715 | ||
4716 | return NULL; | |
4717 | } | |
4718 | ||
4719 | ||
2e471eb5 GM |
4720 | /* Return a string allocated in pure space. DATA is a buffer holding |
4721 | NCHARS characters, and NBYTES bytes of string data. MULTIBYTE | |
4722 | non-zero means make the result string multibyte. | |
1a4f1e2c | 4723 | |
2e471eb5 GM |
4724 | Must get an error if pure storage is full, since if it cannot hold |
4725 | a large string it may be able to hold conses that point to that | |
4726 | string; then the string is not protected from gc. */ | |
7146af97 JB |
4727 | |
4728 | Lisp_Object | |
14162469 EZ |
4729 | make_pure_string (const char *data, |
4730 | EMACS_INT nchars, EMACS_INT nbytes, int multibyte) | |
7146af97 | 4731 | { |
2e471eb5 GM |
4732 | Lisp_Object string; |
4733 | struct Lisp_String *s; | |
c0696668 | 4734 | |
1f0b3fd2 | 4735 | s = (struct Lisp_String *) pure_alloc (sizeof *s, Lisp_String); |
79fd0489 YM |
4736 | s->data = find_string_data_in_pure (data, nbytes); |
4737 | if (s->data == NULL) | |
4738 | { | |
4739 | s->data = (unsigned char *) pure_alloc (nbytes + 1, -1); | |
72af86bd | 4740 | memcpy (s->data, data, nbytes); |
79fd0489 YM |
4741 | s->data[nbytes] = '\0'; |
4742 | } | |
2e471eb5 GM |
4743 | s->size = nchars; |
4744 | s->size_byte = multibyte ? nbytes : -1; | |
2e471eb5 | 4745 | s->intervals = NULL_INTERVAL; |
2e471eb5 GM |
4746 | XSETSTRING (string, s); |
4747 | return string; | |
7146af97 JB |
4748 | } |
4749 | ||
a56eaaef DN |
4750 | /* Return a string a string allocated in pure space. Do not allocate |
4751 | the string data, just point to DATA. */ | |
4752 | ||
4753 | Lisp_Object | |
4754 | make_pure_c_string (const char *data) | |
4755 | { | |
4756 | Lisp_Object string; | |
4757 | struct Lisp_String *s; | |
14162469 | 4758 | EMACS_INT nchars = strlen (data); |
a56eaaef DN |
4759 | |
4760 | s = (struct Lisp_String *) pure_alloc (sizeof *s, Lisp_String); | |
4761 | s->size = nchars; | |
4762 | s->size_byte = -1; | |
323637a2 | 4763 | s->data = (unsigned char *) data; |
a56eaaef DN |
4764 | s->intervals = NULL_INTERVAL; |
4765 | XSETSTRING (string, s); | |
4766 | return string; | |
4767 | } | |
2e471eb5 | 4768 | |
34400008 GM |
4769 | /* Return a cons allocated from pure space. Give it pure copies |
4770 | of CAR as car and CDR as cdr. */ | |
4771 | ||
7146af97 | 4772 | Lisp_Object |
971de7fb | 4773 | pure_cons (Lisp_Object car, Lisp_Object cdr) |
7146af97 JB |
4774 | { |
4775 | register Lisp_Object new; | |
1f0b3fd2 | 4776 | struct Lisp_Cons *p; |
7146af97 | 4777 | |
1f0b3fd2 GM |
4778 | p = (struct Lisp_Cons *) pure_alloc (sizeof *p, Lisp_Cons); |
4779 | XSETCONS (new, p); | |
f3fbd155 KR |
4780 | XSETCAR (new, Fpurecopy (car)); |
4781 | XSETCDR (new, Fpurecopy (cdr)); | |
7146af97 JB |
4782 | return new; |
4783 | } | |
4784 | ||
7146af97 | 4785 | |
34400008 GM |
4786 | /* Value is a float object with value NUM allocated from pure space. */ |
4787 | ||
d3d47262 | 4788 | static Lisp_Object |
971de7fb | 4789 | make_pure_float (double num) |
7146af97 JB |
4790 | { |
4791 | register Lisp_Object new; | |
1f0b3fd2 | 4792 | struct Lisp_Float *p; |
7146af97 | 4793 | |
1f0b3fd2 GM |
4794 | p = (struct Lisp_Float *) pure_alloc (sizeof *p, Lisp_Float); |
4795 | XSETFLOAT (new, p); | |
f601cdf3 | 4796 | XFLOAT_INIT (new, num); |
7146af97 JB |
4797 | return new; |
4798 | } | |
4799 | ||
34400008 GM |
4800 | |
4801 | /* Return a vector with room for LEN Lisp_Objects allocated from | |
4802 | pure space. */ | |
4803 | ||
7146af97 | 4804 | Lisp_Object |
971de7fb | 4805 | make_pure_vector (EMACS_INT len) |
7146af97 | 4806 | { |
1f0b3fd2 GM |
4807 | Lisp_Object new; |
4808 | struct Lisp_Vector *p; | |
4809 | size_t size = sizeof *p + (len - 1) * sizeof (Lisp_Object); | |
7146af97 | 4810 | |
1f0b3fd2 GM |
4811 | p = (struct Lisp_Vector *) pure_alloc (size, Lisp_Vectorlike); |
4812 | XSETVECTOR (new, p); | |
7146af97 JB |
4813 | XVECTOR (new)->size = len; |
4814 | return new; | |
4815 | } | |
4816 | ||
34400008 | 4817 | |
7146af97 | 4818 | DEFUN ("purecopy", Fpurecopy, Spurecopy, 1, 1, 0, |
909e3b33 | 4819 | doc: /* Make a copy of object OBJ in pure storage. |
228299fa | 4820 | Recursively copies contents of vectors and cons cells. |
7ee72033 | 4821 | Does not copy symbols. Copies strings without text properties. */) |
5842a27b | 4822 | (register Lisp_Object obj) |
7146af97 | 4823 | { |
265a9e55 | 4824 | if (NILP (Vpurify_flag)) |
7146af97 JB |
4825 | return obj; |
4826 | ||
1f0b3fd2 | 4827 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
4828 | return obj; |
4829 | ||
e9515805 SM |
4830 | if (HASH_TABLE_P (Vpurify_flag)) /* Hash consing. */ |
4831 | { | |
4832 | Lisp_Object tmp = Fgethash (obj, Vpurify_flag, Qnil); | |
4833 | if (!NILP (tmp)) | |
4834 | return tmp; | |
4835 | } | |
4836 | ||
d6dd74bb | 4837 | if (CONSP (obj)) |
e9515805 | 4838 | obj = pure_cons (XCAR (obj), XCDR (obj)); |
d6dd74bb | 4839 | else if (FLOATP (obj)) |
e9515805 | 4840 | obj = make_pure_float (XFLOAT_DATA (obj)); |
d6dd74bb | 4841 | else if (STRINGP (obj)) |
e9515805 SM |
4842 | obj = make_pure_string (SDATA (obj), SCHARS (obj), |
4843 | SBYTES (obj), | |
4844 | STRING_MULTIBYTE (obj)); | |
b9598260 | 4845 | else if (FUNVECP (obj) || VECTORP (obj)) |
d6dd74bb KH |
4846 | { |
4847 | register struct Lisp_Vector *vec; | |
14162469 | 4848 | register EMACS_INT i; |
6b61353c | 4849 | EMACS_INT size; |
d6dd74bb KH |
4850 | |
4851 | size = XVECTOR (obj)->size; | |
7d535c68 KH |
4852 | if (size & PSEUDOVECTOR_FLAG) |
4853 | size &= PSEUDOVECTOR_SIZE_MASK; | |
6b61353c | 4854 | vec = XVECTOR (make_pure_vector (size)); |
d6dd74bb KH |
4855 | for (i = 0; i < size; i++) |
4856 | vec->contents[i] = Fpurecopy (XVECTOR (obj)->contents[i]); | |
b9598260 | 4857 | if (FUNVECP (obj)) |
985773c9 | 4858 | { |
b9598260 SM |
4859 | XSETPVECTYPE (vec, PVEC_FUNVEC); |
4860 | XSETFUNVEC (obj, vec); | |
985773c9 | 4861 | } |
d6dd74bb KH |
4862 | else |
4863 | XSETVECTOR (obj, vec); | |
7146af97 | 4864 | } |
d6dd74bb KH |
4865 | else if (MARKERP (obj)) |
4866 | error ("Attempt to copy a marker to pure storage"); | |
e9515805 SM |
4867 | else |
4868 | /* Not purified, don't hash-cons. */ | |
4869 | return obj; | |
4870 | ||
4871 | if (HASH_TABLE_P (Vpurify_flag)) /* Hash consing. */ | |
4872 | Fputhash (obj, obj, Vpurify_flag); | |
6bbd7a29 GM |
4873 | |
4874 | return obj; | |
7146af97 | 4875 | } |
2e471eb5 | 4876 | |
34400008 | 4877 | |
7146af97 | 4878 | \f |
34400008 GM |
4879 | /*********************************************************************** |
4880 | Protection from GC | |
4881 | ***********************************************************************/ | |
4882 | ||
2e471eb5 GM |
4883 | /* Put an entry in staticvec, pointing at the variable with address |
4884 | VARADDRESS. */ | |
7146af97 JB |
4885 | |
4886 | void | |
971de7fb | 4887 | staticpro (Lisp_Object *varaddress) |
7146af97 JB |
4888 | { |
4889 | staticvec[staticidx++] = varaddress; | |
4890 | if (staticidx >= NSTATICS) | |
4891 | abort (); | |
4892 | } | |
4893 | ||
7146af97 | 4894 | \f |
34400008 GM |
4895 | /*********************************************************************** |
4896 | Protection from GC | |
4897 | ***********************************************************************/ | |
1a4f1e2c | 4898 | |
e8197642 RS |
4899 | /* Temporarily prevent garbage collection. */ |
4900 | ||
4901 | int | |
971de7fb | 4902 | inhibit_garbage_collection (void) |
e8197642 | 4903 | { |
aed13378 | 4904 | int count = SPECPDL_INDEX (); |
54defd0d AS |
4905 | int nbits = min (VALBITS, BITS_PER_INT); |
4906 | ||
4907 | specbind (Qgc_cons_threshold, make_number (((EMACS_INT) 1 << (nbits - 1)) - 1)); | |
e8197642 RS |
4908 | return count; |
4909 | } | |
4910 | ||
34400008 | 4911 | |
7146af97 | 4912 | DEFUN ("garbage-collect", Fgarbage_collect, Sgarbage_collect, 0, 0, "", |
7ee72033 | 4913 | doc: /* Reclaim storage for Lisp objects no longer needed. |
e1e37596 RS |
4914 | Garbage collection happens automatically if you cons more than |
4915 | `gc-cons-threshold' bytes of Lisp data since previous garbage collection. | |
4916 | `garbage-collect' normally returns a list with info on amount of space in use: | |
228299fa GM |
4917 | ((USED-CONSES . FREE-CONSES) (USED-SYMS . FREE-SYMS) |
4918 | (USED-MARKERS . FREE-MARKERS) USED-STRING-CHARS USED-VECTOR-SLOTS | |
4919 | (USED-FLOATS . FREE-FLOATS) (USED-INTERVALS . FREE-INTERVALS) | |
4920 | (USED-STRINGS . FREE-STRINGS)) | |
e1e37596 RS |
4921 | However, if there was overflow in pure space, `garbage-collect' |
4922 | returns nil, because real GC can't be done. */) | |
5842a27b | 4923 | (void) |
7146af97 | 4924 | { |
7146af97 JB |
4925 | register struct specbinding *bind; |
4926 | struct catchtag *catch; | |
4927 | struct handler *handler; | |
7146af97 JB |
4928 | char stack_top_variable; |
4929 | register int i; | |
6efc7df7 | 4930 | int message_p; |
96117bc7 | 4931 | Lisp_Object total[8]; |
331379bf | 4932 | int count = SPECPDL_INDEX (); |
2c5bd608 DL |
4933 | EMACS_TIME t1, t2, t3; |
4934 | ||
3de0effb RS |
4935 | if (abort_on_gc) |
4936 | abort (); | |
4937 | ||
9e713715 GM |
4938 | /* Can't GC if pure storage overflowed because we can't determine |
4939 | if something is a pure object or not. */ | |
4940 | if (pure_bytes_used_before_overflow) | |
4941 | return Qnil; | |
4942 | ||
bbc012e0 KS |
4943 | CHECK_CONS_LIST (); |
4944 | ||
3c7e66a8 RS |
4945 | /* Don't keep undo information around forever. |
4946 | Do this early on, so it is no problem if the user quits. */ | |
4947 | { | |
4948 | register struct buffer *nextb = all_buffers; | |
4949 | ||
4950 | while (nextb) | |
4951 | { | |
4952 | /* If a buffer's undo list is Qt, that means that undo is | |
4953 | turned off in that buffer. Calling truncate_undo_list on | |
4954 | Qt tends to return NULL, which effectively turns undo back on. | |
4955 | So don't call truncate_undo_list if undo_list is Qt. */ | |
303b0412 | 4956 | if (! NILP (nextb->name) && ! EQ (nextb->undo_list, Qt)) |
3c7e66a8 RS |
4957 | truncate_undo_list (nextb); |
4958 | ||
4959 | /* Shrink buffer gaps, but skip indirect and dead buffers. */ | |
dc7b4525 KH |
4960 | if (nextb->base_buffer == 0 && !NILP (nextb->name) |
4961 | && ! nextb->text->inhibit_shrinking) | |
3c7e66a8 RS |
4962 | { |
4963 | /* If a buffer's gap size is more than 10% of the buffer | |
4964 | size, or larger than 2000 bytes, then shrink it | |
4965 | accordingly. Keep a minimum size of 20 bytes. */ | |
4966 | int size = min (2000, max (20, (nextb->text->z_byte / 10))); | |
4967 | ||
4968 | if (nextb->text->gap_size > size) | |
4969 | { | |
4970 | struct buffer *save_current = current_buffer; | |
4971 | current_buffer = nextb; | |
4972 | make_gap (-(nextb->text->gap_size - size)); | |
4973 | current_buffer = save_current; | |
4974 | } | |
4975 | } | |
4976 | ||
4977 | nextb = nextb->next; | |
4978 | } | |
4979 | } | |
4980 | ||
4981 | EMACS_GET_TIME (t1); | |
4982 | ||
58595309 KH |
4983 | /* In case user calls debug_print during GC, |
4984 | don't let that cause a recursive GC. */ | |
4985 | consing_since_gc = 0; | |
4986 | ||
6efc7df7 GM |
4987 | /* Save what's currently displayed in the echo area. */ |
4988 | message_p = push_message (); | |
c55b0da6 | 4989 | record_unwind_protect (pop_message_unwind, Qnil); |
41c28a37 | 4990 | |
7146af97 JB |
4991 | /* Save a copy of the contents of the stack, for debugging. */ |
4992 | #if MAX_SAVE_STACK > 0 | |
265a9e55 | 4993 | if (NILP (Vpurify_flag)) |
7146af97 JB |
4994 | { |
4995 | i = &stack_top_variable - stack_bottom; | |
4996 | if (i < 0) i = -i; | |
4997 | if (i < MAX_SAVE_STACK) | |
4998 | { | |
4999 | if (stack_copy == 0) | |
9ac0d9e0 | 5000 | stack_copy = (char *) xmalloc (stack_copy_size = i); |
7146af97 | 5001 | else if (stack_copy_size < i) |
9ac0d9e0 | 5002 | stack_copy = (char *) xrealloc (stack_copy, (stack_copy_size = i)); |
7146af97 JB |
5003 | if (stack_copy) |
5004 | { | |
42607681 | 5005 | if ((EMACS_INT) (&stack_top_variable - stack_bottom) > 0) |
72af86bd | 5006 | memcpy (stack_copy, stack_bottom, i); |
7146af97 | 5007 | else |
72af86bd | 5008 | memcpy (stack_copy, &stack_top_variable, i); |
7146af97 JB |
5009 | } |
5010 | } | |
5011 | } | |
5012 | #endif /* MAX_SAVE_STACK > 0 */ | |
5013 | ||
299585ee | 5014 | if (garbage_collection_messages) |
691c4285 | 5015 | message1_nolog ("Garbage collecting..."); |
7146af97 | 5016 | |
6e0fca1d RS |
5017 | BLOCK_INPUT; |
5018 | ||
eec7b73d RS |
5019 | shrink_regexp_cache (); |
5020 | ||
7146af97 JB |
5021 | gc_in_progress = 1; |
5022 | ||
c23baf9f | 5023 | /* clear_marks (); */ |
7146af97 | 5024 | |
005ca5c7 | 5025 | /* Mark all the special slots that serve as the roots of accessibility. */ |
7146af97 JB |
5026 | |
5027 | for (i = 0; i < staticidx; i++) | |
49723c04 | 5028 | mark_object (*staticvec[i]); |
34400008 | 5029 | |
126f9c02 SM |
5030 | for (bind = specpdl; bind != specpdl_ptr; bind++) |
5031 | { | |
5032 | mark_object (bind->symbol); | |
5033 | mark_object (bind->old_value); | |
5034 | } | |
6ed8eeff | 5035 | mark_terminals (); |
126f9c02 | 5036 | mark_kboards (); |
98a92e2d | 5037 | mark_ttys (); |
126f9c02 SM |
5038 | |
5039 | #ifdef USE_GTK | |
5040 | { | |
dd4c5104 | 5041 | extern void xg_mark_data (void); |
126f9c02 SM |
5042 | xg_mark_data (); |
5043 | } | |
5044 | #endif | |
5045 | ||
34400008 GM |
5046 | #if (GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS \ |
5047 | || GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS) | |
5048 | mark_stack (); | |
5049 | #else | |
acf5f7d3 SM |
5050 | { |
5051 | register struct gcpro *tail; | |
5052 | for (tail = gcprolist; tail; tail = tail->next) | |
5053 | for (i = 0; i < tail->nvars; i++) | |
005ca5c7 | 5054 | mark_object (tail->var[i]); |
acf5f7d3 | 5055 | } |
34400008 | 5056 | #endif |
177c0ea7 | 5057 | |
630686c8 | 5058 | mark_byte_stack (); |
7146af97 JB |
5059 | for (catch = catchlist; catch; catch = catch->next) |
5060 | { | |
49723c04 SM |
5061 | mark_object (catch->tag); |
5062 | mark_object (catch->val); | |
177c0ea7 | 5063 | } |
7146af97 JB |
5064 | for (handler = handlerlist; handler; handler = handler->next) |
5065 | { | |
49723c04 SM |
5066 | mark_object (handler->handler); |
5067 | mark_object (handler->var); | |
177c0ea7 | 5068 | } |
b40ea20a | 5069 | mark_backtrace (); |
7146af97 | 5070 | |
454d7973 KS |
5071 | #ifdef HAVE_WINDOW_SYSTEM |
5072 | mark_fringe_data (); | |
5073 | #endif | |
5074 | ||
74c35a48 SM |
5075 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
5076 | mark_stack (); | |
5077 | #endif | |
5078 | ||
c37adf23 SM |
5079 | /* Everything is now marked, except for the things that require special |
5080 | finalization, i.e. the undo_list. | |
5081 | Look thru every buffer's undo list | |
4c315bda RS |
5082 | for elements that update markers that were not marked, |
5083 | and delete them. */ | |
5084 | { | |
5085 | register struct buffer *nextb = all_buffers; | |
5086 | ||
5087 | while (nextb) | |
5088 | { | |
5089 | /* If a buffer's undo list is Qt, that means that undo is | |
5090 | turned off in that buffer. Calling truncate_undo_list on | |
5091 | Qt tends to return NULL, which effectively turns undo back on. | |
5092 | So don't call truncate_undo_list if undo_list is Qt. */ | |
5093 | if (! EQ (nextb->undo_list, Qt)) | |
5094 | { | |
5095 | Lisp_Object tail, prev; | |
5096 | tail = nextb->undo_list; | |
5097 | prev = Qnil; | |
5098 | while (CONSP (tail)) | |
5099 | { | |
8e50cc2d SM |
5100 | if (CONSP (XCAR (tail)) |
5101 | && MARKERP (XCAR (XCAR (tail))) | |
2336fe58 | 5102 | && !XMARKER (XCAR (XCAR (tail)))->gcmarkbit) |
4c315bda RS |
5103 | { |
5104 | if (NILP (prev)) | |
70949dac | 5105 | nextb->undo_list = tail = XCDR (tail); |
4c315bda | 5106 | else |
f3fbd155 KR |
5107 | { |
5108 | tail = XCDR (tail); | |
5109 | XSETCDR (prev, tail); | |
5110 | } | |
4c315bda RS |
5111 | } |
5112 | else | |
5113 | { | |
5114 | prev = tail; | |
70949dac | 5115 | tail = XCDR (tail); |
4c315bda RS |
5116 | } |
5117 | } | |
5118 | } | |
c37adf23 SM |
5119 | /* Now that we have stripped the elements that need not be in the |
5120 | undo_list any more, we can finally mark the list. */ | |
5121 | mark_object (nextb->undo_list); | |
4c315bda RS |
5122 | |
5123 | nextb = nextb->next; | |
5124 | } | |
5125 | } | |
5126 | ||
7146af97 JB |
5127 | gc_sweep (); |
5128 | ||
5129 | /* Clear the mark bits that we set in certain root slots. */ | |
5130 | ||
033a5fa3 | 5131 | unmark_byte_stack (); |
3ef06d12 SM |
5132 | VECTOR_UNMARK (&buffer_defaults); |
5133 | VECTOR_UNMARK (&buffer_local_symbols); | |
7146af97 | 5134 | |
34400008 GM |
5135 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES && 0 |
5136 | dump_zombies (); | |
5137 | #endif | |
5138 | ||
6e0fca1d RS |
5139 | UNBLOCK_INPUT; |
5140 | ||
bbc012e0 KS |
5141 | CHECK_CONS_LIST (); |
5142 | ||
c23baf9f | 5143 | /* clear_marks (); */ |
7146af97 JB |
5144 | gc_in_progress = 0; |
5145 | ||
5146 | consing_since_gc = 0; | |
5147 | if (gc_cons_threshold < 10000) | |
5148 | gc_cons_threshold = 10000; | |
5149 | ||
96f077ad SM |
5150 | if (FLOATP (Vgc_cons_percentage)) |
5151 | { /* Set gc_cons_combined_threshold. */ | |
5152 | EMACS_INT total = 0; | |
974aae61 | 5153 | |
96f077ad SM |
5154 | total += total_conses * sizeof (struct Lisp_Cons); |
5155 | total += total_symbols * sizeof (struct Lisp_Symbol); | |
5156 | total += total_markers * sizeof (union Lisp_Misc); | |
5157 | total += total_string_size; | |
5158 | total += total_vector_size * sizeof (Lisp_Object); | |
5159 | total += total_floats * sizeof (struct Lisp_Float); | |
5160 | total += total_intervals * sizeof (struct interval); | |
5161 | total += total_strings * sizeof (struct Lisp_String); | |
3cd55735 | 5162 | |
974aae61 | 5163 | gc_relative_threshold = total * XFLOAT_DATA (Vgc_cons_percentage); |
96f077ad | 5164 | } |
974aae61 RS |
5165 | else |
5166 | gc_relative_threshold = 0; | |
96f077ad | 5167 | |
299585ee RS |
5168 | if (garbage_collection_messages) |
5169 | { | |
6efc7df7 GM |
5170 | if (message_p || minibuf_level > 0) |
5171 | restore_message (); | |
299585ee RS |
5172 | else |
5173 | message1_nolog ("Garbage collecting...done"); | |
5174 | } | |
7146af97 | 5175 | |
98edb5ff | 5176 | unbind_to (count, Qnil); |
2e471eb5 GM |
5177 | |
5178 | total[0] = Fcons (make_number (total_conses), | |
5179 | make_number (total_free_conses)); | |
5180 | total[1] = Fcons (make_number (total_symbols), | |
5181 | make_number (total_free_symbols)); | |
5182 | total[2] = Fcons (make_number (total_markers), | |
5183 | make_number (total_free_markers)); | |
96117bc7 GM |
5184 | total[3] = make_number (total_string_size); |
5185 | total[4] = make_number (total_vector_size); | |
5186 | total[5] = Fcons (make_number (total_floats), | |
2e471eb5 | 5187 | make_number (total_free_floats)); |
96117bc7 | 5188 | total[6] = Fcons (make_number (total_intervals), |
2e471eb5 | 5189 | make_number (total_free_intervals)); |
96117bc7 | 5190 | total[7] = Fcons (make_number (total_strings), |
2e471eb5 GM |
5191 | make_number (total_free_strings)); |
5192 | ||
34400008 | 5193 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
7146af97 | 5194 | { |
34400008 GM |
5195 | /* Compute average percentage of zombies. */ |
5196 | double nlive = 0; | |
177c0ea7 | 5197 | |
34400008 | 5198 | for (i = 0; i < 7; ++i) |
83fc9c63 DL |
5199 | if (CONSP (total[i])) |
5200 | nlive += XFASTINT (XCAR (total[i])); | |
34400008 GM |
5201 | |
5202 | avg_live = (avg_live * ngcs + nlive) / (ngcs + 1); | |
5203 | max_live = max (nlive, max_live); | |
5204 | avg_zombies = (avg_zombies * ngcs + nzombies) / (ngcs + 1); | |
5205 | max_zombies = max (nzombies, max_zombies); | |
5206 | ++ngcs; | |
5207 | } | |
5208 | #endif | |
7146af97 | 5209 | |
9e713715 GM |
5210 | if (!NILP (Vpost_gc_hook)) |
5211 | { | |
5212 | int count = inhibit_garbage_collection (); | |
5213 | safe_run_hooks (Qpost_gc_hook); | |
5214 | unbind_to (count, Qnil); | |
5215 | } | |
2c5bd608 DL |
5216 | |
5217 | /* Accumulate statistics. */ | |
5218 | EMACS_GET_TIME (t2); | |
5219 | EMACS_SUB_TIME (t3, t2, t1); | |
5220 | if (FLOATP (Vgc_elapsed)) | |
69ab9f85 SM |
5221 | Vgc_elapsed = make_float (XFLOAT_DATA (Vgc_elapsed) + |
5222 | EMACS_SECS (t3) + | |
5223 | EMACS_USECS (t3) * 1.0e-6); | |
2c5bd608 DL |
5224 | gcs_done++; |
5225 | ||
96117bc7 | 5226 | return Flist (sizeof total / sizeof *total, total); |
7146af97 | 5227 | } |
34400008 | 5228 | |
41c28a37 | 5229 | |
3770920e GM |
5230 | /* Mark Lisp objects in glyph matrix MATRIX. Currently the |
5231 | only interesting objects referenced from glyphs are strings. */ | |
41c28a37 GM |
5232 | |
5233 | static void | |
971de7fb | 5234 | mark_glyph_matrix (struct glyph_matrix *matrix) |
41c28a37 GM |
5235 | { |
5236 | struct glyph_row *row = matrix->rows; | |
5237 | struct glyph_row *end = row + matrix->nrows; | |
5238 | ||
2e471eb5 GM |
5239 | for (; row < end; ++row) |
5240 | if (row->enabled_p) | |
5241 | { | |
5242 | int area; | |
5243 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
5244 | { | |
5245 | struct glyph *glyph = row->glyphs[area]; | |
5246 | struct glyph *end_glyph = glyph + row->used[area]; | |
177c0ea7 | 5247 | |
2e471eb5 | 5248 | for (; glyph < end_glyph; ++glyph) |
8e50cc2d | 5249 | if (STRINGP (glyph->object) |
2e471eb5 | 5250 | && !STRING_MARKED_P (XSTRING (glyph->object))) |
49723c04 | 5251 | mark_object (glyph->object); |
2e471eb5 GM |
5252 | } |
5253 | } | |
41c28a37 GM |
5254 | } |
5255 | ||
34400008 | 5256 | |
41c28a37 GM |
5257 | /* Mark Lisp faces in the face cache C. */ |
5258 | ||
5259 | static void | |
971de7fb | 5260 | mark_face_cache (struct face_cache *c) |
41c28a37 GM |
5261 | { |
5262 | if (c) | |
5263 | { | |
5264 | int i, j; | |
5265 | for (i = 0; i < c->used; ++i) | |
5266 | { | |
5267 | struct face *face = FACE_FROM_ID (c->f, i); | |
5268 | ||
5269 | if (face) | |
5270 | { | |
5271 | for (j = 0; j < LFACE_VECTOR_SIZE; ++j) | |
49723c04 | 5272 | mark_object (face->lface[j]); |
41c28a37 GM |
5273 | } |
5274 | } | |
5275 | } | |
5276 | } | |
5277 | ||
5278 | ||
7146af97 | 5279 | \f |
1a4f1e2c | 5280 | /* Mark reference to a Lisp_Object. |
2e471eb5 GM |
5281 | If the object referred to has not been seen yet, recursively mark |
5282 | all the references contained in it. */ | |
7146af97 | 5283 | |
785cd37f | 5284 | #define LAST_MARKED_SIZE 500 |
d3d47262 | 5285 | static Lisp_Object last_marked[LAST_MARKED_SIZE]; |
785cd37f RS |
5286 | int last_marked_index; |
5287 | ||
1342fc6f RS |
5288 | /* For debugging--call abort when we cdr down this many |
5289 | links of a list, in mark_object. In debugging, | |
5290 | the call to abort will hit a breakpoint. | |
5291 | Normally this is zero and the check never goes off. */ | |
d3d47262 | 5292 | static int mark_object_loop_halt; |
1342fc6f | 5293 | |
8f11f7ec | 5294 | static void |
971de7fb | 5295 | mark_vectorlike (struct Lisp_Vector *ptr) |
d2029e5b | 5296 | { |
14162469 EZ |
5297 | register EMACS_UINT size = ptr->size; |
5298 | register EMACS_UINT i; | |
d2029e5b | 5299 | |
8f11f7ec | 5300 | eassert (!VECTOR_MARKED_P (ptr)); |
d2029e5b SM |
5301 | VECTOR_MARK (ptr); /* Else mark it */ |
5302 | if (size & PSEUDOVECTOR_FLAG) | |
5303 | size &= PSEUDOVECTOR_SIZE_MASK; | |
d3d47262 | 5304 | |
d2029e5b SM |
5305 | /* Note that this size is not the memory-footprint size, but only |
5306 | the number of Lisp_Object fields that we should trace. | |
5307 | The distinction is used e.g. by Lisp_Process which places extra | |
5308 | non-Lisp_Object fields at the end of the structure. */ | |
5309 | for (i = 0; i < size; i++) /* and then mark its elements */ | |
5310 | mark_object (ptr->contents[i]); | |
d2029e5b SM |
5311 | } |
5312 | ||
58026347 KH |
5313 | /* Like mark_vectorlike but optimized for char-tables (and |
5314 | sub-char-tables) assuming that the contents are mostly integers or | |
5315 | symbols. */ | |
5316 | ||
5317 | static void | |
971de7fb | 5318 | mark_char_table (struct Lisp_Vector *ptr) |
58026347 | 5319 | { |
14162469 EZ |
5320 | register EMACS_UINT size = ptr->size & PSEUDOVECTOR_SIZE_MASK; |
5321 | register EMACS_UINT i; | |
58026347 | 5322 | |
8f11f7ec | 5323 | eassert (!VECTOR_MARKED_P (ptr)); |
58026347 KH |
5324 | VECTOR_MARK (ptr); |
5325 | for (i = 0; i < size; i++) | |
5326 | { | |
5327 | Lisp_Object val = ptr->contents[i]; | |
5328 | ||
5329 | if (INTEGERP (val) || SYMBOLP (val) && XSYMBOL (val)->gcmarkbit) | |
5330 | continue; | |
5331 | if (SUB_CHAR_TABLE_P (val)) | |
5332 | { | |
5333 | if (! VECTOR_MARKED_P (XVECTOR (val))) | |
5334 | mark_char_table (XVECTOR (val)); | |
5335 | } | |
5336 | else | |
5337 | mark_object (val); | |
5338 | } | |
5339 | } | |
5340 | ||
41c28a37 | 5341 | void |
971de7fb | 5342 | mark_object (Lisp_Object arg) |
7146af97 | 5343 | { |
49723c04 | 5344 | register Lisp_Object obj = arg; |
4f5c1376 GM |
5345 | #ifdef GC_CHECK_MARKED_OBJECTS |
5346 | void *po; | |
5347 | struct mem_node *m; | |
5348 | #endif | |
1342fc6f | 5349 | int cdr_count = 0; |
7146af97 | 5350 | |
9149e743 | 5351 | loop: |
7146af97 | 5352 | |
1f0b3fd2 | 5353 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
5354 | return; |
5355 | ||
49723c04 | 5356 | last_marked[last_marked_index++] = obj; |
785cd37f RS |
5357 | if (last_marked_index == LAST_MARKED_SIZE) |
5358 | last_marked_index = 0; | |
5359 | ||
4f5c1376 GM |
5360 | /* Perform some sanity checks on the objects marked here. Abort if |
5361 | we encounter an object we know is bogus. This increases GC time | |
5362 | by ~80%, and requires compilation with GC_MARK_STACK != 0. */ | |
5363 | #ifdef GC_CHECK_MARKED_OBJECTS | |
5364 | ||
5365 | po = (void *) XPNTR (obj); | |
5366 | ||
5367 | /* Check that the object pointed to by PO is known to be a Lisp | |
5368 | structure allocated from the heap. */ | |
5369 | #define CHECK_ALLOCATED() \ | |
5370 | do { \ | |
5371 | m = mem_find (po); \ | |
5372 | if (m == MEM_NIL) \ | |
5373 | abort (); \ | |
5374 | } while (0) | |
5375 | ||
5376 | /* Check that the object pointed to by PO is live, using predicate | |
5377 | function LIVEP. */ | |
5378 | #define CHECK_LIVE(LIVEP) \ | |
5379 | do { \ | |
5380 | if (!LIVEP (m, po)) \ | |
5381 | abort (); \ | |
5382 | } while (0) | |
5383 | ||
5384 | /* Check both of the above conditions. */ | |
5385 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) \ | |
5386 | do { \ | |
5387 | CHECK_ALLOCATED (); \ | |
5388 | CHECK_LIVE (LIVEP); \ | |
5389 | } while (0) \ | |
177c0ea7 | 5390 | |
4f5c1376 | 5391 | #else /* not GC_CHECK_MARKED_OBJECTS */ |
177c0ea7 | 5392 | |
4f5c1376 GM |
5393 | #define CHECK_ALLOCATED() (void) 0 |
5394 | #define CHECK_LIVE(LIVEP) (void) 0 | |
5395 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) (void) 0 | |
177c0ea7 | 5396 | |
4f5c1376 GM |
5397 | #endif /* not GC_CHECK_MARKED_OBJECTS */ |
5398 | ||
8e50cc2d | 5399 | switch (SWITCH_ENUM_CAST (XTYPE (obj))) |
7146af97 JB |
5400 | { |
5401 | case Lisp_String: | |
5402 | { | |
5403 | register struct Lisp_String *ptr = XSTRING (obj); | |
8f11f7ec SM |
5404 | if (STRING_MARKED_P (ptr)) |
5405 | break; | |
4f5c1376 | 5406 | CHECK_ALLOCATED_AND_LIVE (live_string_p); |
d5e35230 | 5407 | MARK_INTERVAL_TREE (ptr->intervals); |
2e471eb5 | 5408 | MARK_STRING (ptr); |
361b097f | 5409 | #ifdef GC_CHECK_STRING_BYTES |
676a7251 GM |
5410 | /* Check that the string size recorded in the string is the |
5411 | same as the one recorded in the sdata structure. */ | |
5412 | CHECK_STRING_BYTES (ptr); | |
361b097f | 5413 | #endif /* GC_CHECK_STRING_BYTES */ |
7146af97 JB |
5414 | } |
5415 | break; | |
5416 | ||
76437631 | 5417 | case Lisp_Vectorlike: |
8f11f7ec SM |
5418 | if (VECTOR_MARKED_P (XVECTOR (obj))) |
5419 | break; | |
4f5c1376 GM |
5420 | #ifdef GC_CHECK_MARKED_OBJECTS |
5421 | m = mem_find (po); | |
8e50cc2d | 5422 | if (m == MEM_NIL && !SUBRP (obj) |
4f5c1376 GM |
5423 | && po != &buffer_defaults |
5424 | && po != &buffer_local_symbols) | |
5425 | abort (); | |
5426 | #endif /* GC_CHECK_MARKED_OBJECTS */ | |
177c0ea7 | 5427 | |
8e50cc2d | 5428 | if (BUFFERP (obj)) |
6b552283 | 5429 | { |
4f5c1376 | 5430 | #ifdef GC_CHECK_MARKED_OBJECTS |
8f11f7ec SM |
5431 | if (po != &buffer_defaults && po != &buffer_local_symbols) |
5432 | { | |
5433 | struct buffer *b; | |
5434 | for (b = all_buffers; b && b != po; b = b->next) | |
5435 | ; | |
5436 | if (b == NULL) | |
5437 | abort (); | |
4f5c1376 | 5438 | } |
8f11f7ec SM |
5439 | #endif /* GC_CHECK_MARKED_OBJECTS */ |
5440 | mark_buffer (obj); | |
6b552283 | 5441 | } |
8e50cc2d | 5442 | else if (SUBRP (obj)) |
169ee243 | 5443 | break; |
b9598260 | 5444 | else if (FUNVECP (obj) && FUNVEC_COMPILED_P (obj)) |
2e471eb5 GM |
5445 | /* We could treat this just like a vector, but it is better to |
5446 | save the COMPILED_CONSTANTS element for last and avoid | |
5447 | recursion there. */ | |
169ee243 RS |
5448 | { |
5449 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
14162469 EZ |
5450 | register EMACS_UINT size = ptr->size; |
5451 | register EMACS_UINT i; | |
169ee243 | 5452 | |
4f5c1376 | 5453 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 5454 | VECTOR_MARK (ptr); /* Else mark it */ |
76437631 | 5455 | size &= PSEUDOVECTOR_SIZE_MASK; |
169ee243 RS |
5456 | for (i = 0; i < size; i++) /* and then mark its elements */ |
5457 | { | |
5458 | if (i != COMPILED_CONSTANTS) | |
49723c04 | 5459 | mark_object (ptr->contents[i]); |
169ee243 | 5460 | } |
49723c04 | 5461 | obj = ptr->contents[COMPILED_CONSTANTS]; |
169ee243 RS |
5462 | goto loop; |
5463 | } | |
8e50cc2d | 5464 | else if (FRAMEP (obj)) |
169ee243 | 5465 | { |
c70bbf06 | 5466 | register struct frame *ptr = XFRAME (obj); |
8f11f7ec SM |
5467 | mark_vectorlike (XVECTOR (obj)); |
5468 | mark_face_cache (ptr->face_cache); | |
707788bd | 5469 | } |
8e50cc2d | 5470 | else if (WINDOWP (obj)) |
41c28a37 GM |
5471 | { |
5472 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
5473 | struct window *w = XWINDOW (obj); | |
8f11f7ec SM |
5474 | mark_vectorlike (ptr); |
5475 | /* Mark glyphs for leaf windows. Marking window matrices is | |
5476 | sufficient because frame matrices use the same glyph | |
5477 | memory. */ | |
5478 | if (NILP (w->hchild) | |
5479 | && NILP (w->vchild) | |
5480 | && w->current_matrix) | |
41c28a37 | 5481 | { |
8f11f7ec SM |
5482 | mark_glyph_matrix (w->current_matrix); |
5483 | mark_glyph_matrix (w->desired_matrix); | |
41c28a37 GM |
5484 | } |
5485 | } | |
8e50cc2d | 5486 | else if (HASH_TABLE_P (obj)) |
41c28a37 GM |
5487 | { |
5488 | struct Lisp_Hash_Table *h = XHASH_TABLE (obj); | |
8f11f7ec SM |
5489 | mark_vectorlike ((struct Lisp_Vector *)h); |
5490 | /* If hash table is not weak, mark all keys and values. | |
5491 | For weak tables, mark only the vector. */ | |
5492 | if (NILP (h->weak)) | |
5493 | mark_object (h->key_and_value); | |
5494 | else | |
5495 | VECTOR_MARK (XVECTOR (h->key_and_value)); | |
41c28a37 | 5496 | } |
58026347 | 5497 | else if (CHAR_TABLE_P (obj)) |
8f11f7ec | 5498 | mark_char_table (XVECTOR (obj)); |
04ff9756 | 5499 | else |
d2029e5b | 5500 | mark_vectorlike (XVECTOR (obj)); |
169ee243 | 5501 | break; |
7146af97 | 5502 | |
7146af97 JB |
5503 | case Lisp_Symbol: |
5504 | { | |
c70bbf06 | 5505 | register struct Lisp_Symbol *ptr = XSYMBOL (obj); |
7146af97 JB |
5506 | struct Lisp_Symbol *ptrx; |
5507 | ||
8f11f7ec SM |
5508 | if (ptr->gcmarkbit) |
5509 | break; | |
4f5c1376 | 5510 | CHECK_ALLOCATED_AND_LIVE (live_symbol_p); |
2336fe58 | 5511 | ptr->gcmarkbit = 1; |
49723c04 SM |
5512 | mark_object (ptr->function); |
5513 | mark_object (ptr->plist); | |
ce5b453a SM |
5514 | switch (ptr->redirect) |
5515 | { | |
5516 | case SYMBOL_PLAINVAL: mark_object (SYMBOL_VAL (ptr)); break; | |
5517 | case SYMBOL_VARALIAS: | |
5518 | { | |
5519 | Lisp_Object tem; | |
5520 | XSETSYMBOL (tem, SYMBOL_ALIAS (ptr)); | |
5521 | mark_object (tem); | |
5522 | break; | |
5523 | } | |
5524 | case SYMBOL_LOCALIZED: | |
5525 | { | |
5526 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (ptr); | |
5527 | /* If the value is forwarded to a buffer or keyboard field, | |
5528 | these are marked when we see the corresponding object. | |
5529 | And if it's forwarded to a C variable, either it's not | |
5530 | a Lisp_Object var, or it's staticpro'd already. */ | |
5531 | mark_object (blv->where); | |
5532 | mark_object (blv->valcell); | |
5533 | mark_object (blv->defcell); | |
5534 | break; | |
5535 | } | |
5536 | case SYMBOL_FORWARDED: | |
5537 | /* If the value is forwarded to a buffer or keyboard field, | |
5538 | these are marked when we see the corresponding object. | |
5539 | And if it's forwarded to a C variable, either it's not | |
5540 | a Lisp_Object var, or it's staticpro'd already. */ | |
5541 | break; | |
5542 | default: abort (); | |
5543 | } | |
8fe5665d KR |
5544 | if (!PURE_POINTER_P (XSTRING (ptr->xname))) |
5545 | MARK_STRING (XSTRING (ptr->xname)); | |
d5db4077 | 5546 | MARK_INTERVAL_TREE (STRING_INTERVALS (ptr->xname)); |
177c0ea7 | 5547 | |
7146af97 JB |
5548 | ptr = ptr->next; |
5549 | if (ptr) | |
5550 | { | |
b0846f52 | 5551 | ptrx = ptr; /* Use of ptrx avoids compiler bug on Sun */ |
7146af97 | 5552 | XSETSYMBOL (obj, ptrx); |
49723c04 | 5553 | goto loop; |
7146af97 JB |
5554 | } |
5555 | } | |
5556 | break; | |
5557 | ||
a0a38eb7 | 5558 | case Lisp_Misc: |
4f5c1376 | 5559 | CHECK_ALLOCATED_AND_LIVE (live_misc_p); |
67ee9f6e | 5560 | if (XMISCANY (obj)->gcmarkbit) |
2336fe58 | 5561 | break; |
67ee9f6e | 5562 | XMISCANY (obj)->gcmarkbit = 1; |
b766f870 | 5563 | |
a5da44fe | 5564 | switch (XMISCTYPE (obj)) |
a0a38eb7 | 5565 | { |
465edf35 | 5566 | |
2336fe58 SM |
5567 | case Lisp_Misc_Marker: |
5568 | /* DO NOT mark thru the marker's chain. | |
5569 | The buffer's markers chain does not preserve markers from gc; | |
5570 | instead, markers are removed from the chain when freed by gc. */ | |
b766f870 KS |
5571 | break; |
5572 | ||
8f924df7 | 5573 | case Lisp_Misc_Save_Value: |
9ea306d1 | 5574 | #if GC_MARK_STACK |
b766f870 KS |
5575 | { |
5576 | register struct Lisp_Save_Value *ptr = XSAVE_VALUE (obj); | |
5577 | /* If DOGC is set, POINTER is the address of a memory | |
5578 | area containing INTEGER potential Lisp_Objects. */ | |
5579 | if (ptr->dogc) | |
5580 | { | |
5581 | Lisp_Object *p = (Lisp_Object *) ptr->pointer; | |
5582 | int nelt; | |
5583 | for (nelt = ptr->integer; nelt > 0; nelt--, p++) | |
5584 | mark_maybe_object (*p); | |
5585 | } | |
5586 | } | |
9ea306d1 | 5587 | #endif |
c8616056 KH |
5588 | break; |
5589 | ||
e202fa34 KH |
5590 | case Lisp_Misc_Overlay: |
5591 | { | |
5592 | struct Lisp_Overlay *ptr = XOVERLAY (obj); | |
49723c04 SM |
5593 | mark_object (ptr->start); |
5594 | mark_object (ptr->end); | |
f54253ec SM |
5595 | mark_object (ptr->plist); |
5596 | if (ptr->next) | |
5597 | { | |
5598 | XSETMISC (obj, ptr->next); | |
5599 | goto loop; | |
5600 | } | |
e202fa34 KH |
5601 | } |
5602 | break; | |
5603 | ||
a0a38eb7 KH |
5604 | default: |
5605 | abort (); | |
5606 | } | |
7146af97 JB |
5607 | break; |
5608 | ||
5609 | case Lisp_Cons: | |
7146af97 JB |
5610 | { |
5611 | register struct Lisp_Cons *ptr = XCONS (obj); | |
8f11f7ec SM |
5612 | if (CONS_MARKED_P (ptr)) |
5613 | break; | |
4f5c1376 | 5614 | CHECK_ALLOCATED_AND_LIVE (live_cons_p); |
08b7c2cb | 5615 | CONS_MARK (ptr); |
c54ca951 | 5616 | /* If the cdr is nil, avoid recursion for the car. */ |
28a099a4 | 5617 | if (EQ (ptr->u.cdr, Qnil)) |
c54ca951 | 5618 | { |
49723c04 | 5619 | obj = ptr->car; |
1342fc6f | 5620 | cdr_count = 0; |
c54ca951 RS |
5621 | goto loop; |
5622 | } | |
49723c04 | 5623 | mark_object (ptr->car); |
28a099a4 | 5624 | obj = ptr->u.cdr; |
1342fc6f RS |
5625 | cdr_count++; |
5626 | if (cdr_count == mark_object_loop_halt) | |
5627 | abort (); | |
7146af97 JB |
5628 | goto loop; |
5629 | } | |
5630 | ||
7146af97 | 5631 | case Lisp_Float: |
4f5c1376 | 5632 | CHECK_ALLOCATED_AND_LIVE (live_float_p); |
ab6780cd | 5633 | FLOAT_MARK (XFLOAT (obj)); |
7146af97 | 5634 | break; |
7146af97 | 5635 | |
2de9f71c | 5636 | case_Lisp_Int: |
7146af97 JB |
5637 | break; |
5638 | ||
5639 | default: | |
5640 | abort (); | |
5641 | } | |
4f5c1376 GM |
5642 | |
5643 | #undef CHECK_LIVE | |
5644 | #undef CHECK_ALLOCATED | |
5645 | #undef CHECK_ALLOCATED_AND_LIVE | |
7146af97 JB |
5646 | } |
5647 | ||
5648 | /* Mark the pointers in a buffer structure. */ | |
5649 | ||
5650 | static void | |
971de7fb | 5651 | mark_buffer (Lisp_Object buf) |
7146af97 | 5652 | { |
7146af97 | 5653 | register struct buffer *buffer = XBUFFER (buf); |
f54253ec | 5654 | register Lisp_Object *ptr, tmp; |
30e3190a | 5655 | Lisp_Object base_buffer; |
7146af97 | 5656 | |
8f11f7ec | 5657 | eassert (!VECTOR_MARKED_P (buffer)); |
3ef06d12 | 5658 | VECTOR_MARK (buffer); |
7146af97 | 5659 | |
30e3190a | 5660 | MARK_INTERVAL_TREE (BUF_INTERVALS (buffer)); |
d5e35230 | 5661 | |
c37adf23 SM |
5662 | /* For now, we just don't mark the undo_list. It's done later in |
5663 | a special way just before the sweep phase, and after stripping | |
5664 | some of its elements that are not needed any more. */ | |
4c315bda | 5665 | |
f54253ec SM |
5666 | if (buffer->overlays_before) |
5667 | { | |
5668 | XSETMISC (tmp, buffer->overlays_before); | |
5669 | mark_object (tmp); | |
5670 | } | |
5671 | if (buffer->overlays_after) | |
5672 | { | |
5673 | XSETMISC (tmp, buffer->overlays_after); | |
5674 | mark_object (tmp); | |
5675 | } | |
5676 | ||
9ce376f9 SM |
5677 | /* buffer-local Lisp variables start at `undo_list', |
5678 | tho only the ones from `name' on are GC'd normally. */ | |
3ef06d12 | 5679 | for (ptr = &buffer->name; |
7146af97 JB |
5680 | (char *)ptr < (char *)buffer + sizeof (struct buffer); |
5681 | ptr++) | |
49723c04 | 5682 | mark_object (*ptr); |
30e3190a RS |
5683 | |
5684 | /* If this is an indirect buffer, mark its base buffer. */ | |
349bd9ed | 5685 | if (buffer->base_buffer && !VECTOR_MARKED_P (buffer->base_buffer)) |
30e3190a | 5686 | { |
177c0ea7 | 5687 | XSETBUFFER (base_buffer, buffer->base_buffer); |
30e3190a RS |
5688 | mark_buffer (base_buffer); |
5689 | } | |
7146af97 | 5690 | } |
084b1a0c | 5691 | |
4a729fd8 SM |
5692 | /* Mark the Lisp pointers in the terminal objects. |
5693 | Called by the Fgarbage_collector. */ | |
5694 | ||
4a729fd8 SM |
5695 | static void |
5696 | mark_terminals (void) | |
5697 | { | |
5698 | struct terminal *t; | |
5699 | for (t = terminal_list; t; t = t->next_terminal) | |
5700 | { | |
5701 | eassert (t->name != NULL); | |
354884c4 | 5702 | #ifdef HAVE_WINDOW_SYSTEM |
96ad0af7 YM |
5703 | /* If a terminal object is reachable from a stacpro'ed object, |
5704 | it might have been marked already. Make sure the image cache | |
5705 | gets marked. */ | |
5706 | mark_image_cache (t->image_cache); | |
354884c4 | 5707 | #endif /* HAVE_WINDOW_SYSTEM */ |
96ad0af7 YM |
5708 | if (!VECTOR_MARKED_P (t)) |
5709 | mark_vectorlike ((struct Lisp_Vector *)t); | |
4a729fd8 SM |
5710 | } |
5711 | } | |
5712 | ||
5713 | ||
084b1a0c | 5714 | |
41c28a37 GM |
5715 | /* Value is non-zero if OBJ will survive the current GC because it's |
5716 | either marked or does not need to be marked to survive. */ | |
5717 | ||
5718 | int | |
971de7fb | 5719 | survives_gc_p (Lisp_Object obj) |
41c28a37 GM |
5720 | { |
5721 | int survives_p; | |
177c0ea7 | 5722 | |
8e50cc2d | 5723 | switch (XTYPE (obj)) |
41c28a37 | 5724 | { |
2de9f71c | 5725 | case_Lisp_Int: |
41c28a37 GM |
5726 | survives_p = 1; |
5727 | break; | |
5728 | ||
5729 | case Lisp_Symbol: | |
2336fe58 | 5730 | survives_p = XSYMBOL (obj)->gcmarkbit; |
41c28a37 GM |
5731 | break; |
5732 | ||
5733 | case Lisp_Misc: | |
67ee9f6e | 5734 | survives_p = XMISCANY (obj)->gcmarkbit; |
41c28a37 GM |
5735 | break; |
5736 | ||
5737 | case Lisp_String: | |
08b7c2cb | 5738 | survives_p = STRING_MARKED_P (XSTRING (obj)); |
41c28a37 GM |
5739 | break; |
5740 | ||
5741 | case Lisp_Vectorlike: | |
8e50cc2d | 5742 | survives_p = SUBRP (obj) || VECTOR_MARKED_P (XVECTOR (obj)); |
41c28a37 GM |
5743 | break; |
5744 | ||
5745 | case Lisp_Cons: | |
08b7c2cb | 5746 | survives_p = CONS_MARKED_P (XCONS (obj)); |
41c28a37 GM |
5747 | break; |
5748 | ||
41c28a37 | 5749 | case Lisp_Float: |
ab6780cd | 5750 | survives_p = FLOAT_MARKED_P (XFLOAT (obj)); |
41c28a37 | 5751 | break; |
41c28a37 GM |
5752 | |
5753 | default: | |
5754 | abort (); | |
5755 | } | |
5756 | ||
34400008 | 5757 | return survives_p || PURE_POINTER_P ((void *) XPNTR (obj)); |
41c28a37 GM |
5758 | } |
5759 | ||
5760 | ||
7146af97 | 5761 | \f |
1a4f1e2c | 5762 | /* Sweep: find all structures not marked, and free them. */ |
7146af97 JB |
5763 | |
5764 | static void | |
971de7fb | 5765 | gc_sweep (void) |
7146af97 | 5766 | { |
41c28a37 GM |
5767 | /* Remove or mark entries in weak hash tables. |
5768 | This must be done before any object is unmarked. */ | |
5769 | sweep_weak_hash_tables (); | |
5770 | ||
2e471eb5 | 5771 | sweep_strings (); |
676a7251 GM |
5772 | #ifdef GC_CHECK_STRING_BYTES |
5773 | if (!noninteractive) | |
5774 | check_string_bytes (1); | |
5775 | #endif | |
7146af97 JB |
5776 | |
5777 | /* Put all unmarked conses on free list */ | |
5778 | { | |
5779 | register struct cons_block *cblk; | |
6ca94ac9 | 5780 | struct cons_block **cprev = &cons_block; |
7146af97 JB |
5781 | register int lim = cons_block_index; |
5782 | register int num_free = 0, num_used = 0; | |
5783 | ||
5784 | cons_free_list = 0; | |
177c0ea7 | 5785 | |
6ca94ac9 | 5786 | for (cblk = cons_block; cblk; cblk = *cprev) |
7146af97 | 5787 | { |
3ae2e3a3 | 5788 | register int i = 0; |
6ca94ac9 | 5789 | int this_free = 0; |
3ae2e3a3 RS |
5790 | int ilim = (lim + BITS_PER_INT - 1) / BITS_PER_INT; |
5791 | ||
5792 | /* Scan the mark bits an int at a time. */ | |
5793 | for (i = 0; i <= ilim; i++) | |
5794 | { | |
5795 | if (cblk->gcmarkbits[i] == -1) | |
5796 | { | |
5797 | /* Fast path - all cons cells for this int are marked. */ | |
5798 | cblk->gcmarkbits[i] = 0; | |
5799 | num_used += BITS_PER_INT; | |
5800 | } | |
5801 | else | |
5802 | { | |
5803 | /* Some cons cells for this int are not marked. | |
5804 | Find which ones, and free them. */ | |
5805 | int start, pos, stop; | |
5806 | ||
5807 | start = i * BITS_PER_INT; | |
5808 | stop = lim - start; | |
5809 | if (stop > BITS_PER_INT) | |
5810 | stop = BITS_PER_INT; | |
5811 | stop += start; | |
5812 | ||
5813 | for (pos = start; pos < stop; pos++) | |
5814 | { | |
5815 | if (!CONS_MARKED_P (&cblk->conses[pos])) | |
5816 | { | |
5817 | this_free++; | |
5818 | cblk->conses[pos].u.chain = cons_free_list; | |
5819 | cons_free_list = &cblk->conses[pos]; | |
34400008 | 5820 | #if GC_MARK_STACK |
3ae2e3a3 | 5821 | cons_free_list->car = Vdead; |
34400008 | 5822 | #endif |
3ae2e3a3 RS |
5823 | } |
5824 | else | |
5825 | { | |
5826 | num_used++; | |
5827 | CONS_UNMARK (&cblk->conses[pos]); | |
5828 | } | |
5829 | } | |
5830 | } | |
5831 | } | |
5832 | ||
7146af97 | 5833 | lim = CONS_BLOCK_SIZE; |
6ca94ac9 KH |
5834 | /* If this block contains only free conses and we have already |
5835 | seen more than two blocks worth of free conses then deallocate | |
5836 | this block. */ | |
6feef451 | 5837 | if (this_free == CONS_BLOCK_SIZE && num_free > CONS_BLOCK_SIZE) |
6ca94ac9 | 5838 | { |
6ca94ac9 KH |
5839 | *cprev = cblk->next; |
5840 | /* Unhook from the free list. */ | |
28a099a4 | 5841 | cons_free_list = cblk->conses[0].u.chain; |
08b7c2cb | 5842 | lisp_align_free (cblk); |
c8099634 | 5843 | n_cons_blocks--; |
6ca94ac9 KH |
5844 | } |
5845 | else | |
6feef451 AS |
5846 | { |
5847 | num_free += this_free; | |
5848 | cprev = &cblk->next; | |
5849 | } | |
7146af97 JB |
5850 | } |
5851 | total_conses = num_used; | |
5852 | total_free_conses = num_free; | |
5853 | } | |
5854 | ||
7146af97 JB |
5855 | /* Put all unmarked floats on free list */ |
5856 | { | |
5857 | register struct float_block *fblk; | |
6ca94ac9 | 5858 | struct float_block **fprev = &float_block; |
7146af97 JB |
5859 | register int lim = float_block_index; |
5860 | register int num_free = 0, num_used = 0; | |
5861 | ||
5862 | float_free_list = 0; | |
177c0ea7 | 5863 | |
6ca94ac9 | 5864 | for (fblk = float_block; fblk; fblk = *fprev) |
7146af97 JB |
5865 | { |
5866 | register int i; | |
6ca94ac9 | 5867 | int this_free = 0; |
7146af97 | 5868 | for (i = 0; i < lim; i++) |
ab6780cd | 5869 | if (!FLOAT_MARKED_P (&fblk->floats[i])) |
7146af97 | 5870 | { |
6ca94ac9 | 5871 | this_free++; |
28a099a4 | 5872 | fblk->floats[i].u.chain = float_free_list; |
7146af97 JB |
5873 | float_free_list = &fblk->floats[i]; |
5874 | } | |
5875 | else | |
5876 | { | |
5877 | num_used++; | |
ab6780cd | 5878 | FLOAT_UNMARK (&fblk->floats[i]); |
7146af97 JB |
5879 | } |
5880 | lim = FLOAT_BLOCK_SIZE; | |
6ca94ac9 KH |
5881 | /* If this block contains only free floats and we have already |
5882 | seen more than two blocks worth of free floats then deallocate | |
5883 | this block. */ | |
6feef451 | 5884 | if (this_free == FLOAT_BLOCK_SIZE && num_free > FLOAT_BLOCK_SIZE) |
6ca94ac9 | 5885 | { |
6ca94ac9 KH |
5886 | *fprev = fblk->next; |
5887 | /* Unhook from the free list. */ | |
28a099a4 | 5888 | float_free_list = fblk->floats[0].u.chain; |
ab6780cd | 5889 | lisp_align_free (fblk); |
c8099634 | 5890 | n_float_blocks--; |
6ca94ac9 KH |
5891 | } |
5892 | else | |
6feef451 AS |
5893 | { |
5894 | num_free += this_free; | |
5895 | fprev = &fblk->next; | |
5896 | } | |
7146af97 JB |
5897 | } |
5898 | total_floats = num_used; | |
5899 | total_free_floats = num_free; | |
5900 | } | |
7146af97 | 5901 | |
d5e35230 JA |
5902 | /* Put all unmarked intervals on free list */ |
5903 | { | |
5904 | register struct interval_block *iblk; | |
6ca94ac9 | 5905 | struct interval_block **iprev = &interval_block; |
d5e35230 JA |
5906 | register int lim = interval_block_index; |
5907 | register int num_free = 0, num_used = 0; | |
5908 | ||
5909 | interval_free_list = 0; | |
5910 | ||
6ca94ac9 | 5911 | for (iblk = interval_block; iblk; iblk = *iprev) |
d5e35230 JA |
5912 | { |
5913 | register int i; | |
6ca94ac9 | 5914 | int this_free = 0; |
d5e35230 JA |
5915 | |
5916 | for (i = 0; i < lim; i++) | |
5917 | { | |
2336fe58 | 5918 | if (!iblk->intervals[i].gcmarkbit) |
d5e35230 | 5919 | { |
439d5cb4 | 5920 | SET_INTERVAL_PARENT (&iblk->intervals[i], interval_free_list); |
d5e35230 | 5921 | interval_free_list = &iblk->intervals[i]; |
6ca94ac9 | 5922 | this_free++; |
d5e35230 JA |
5923 | } |
5924 | else | |
5925 | { | |
5926 | num_used++; | |
2336fe58 | 5927 | iblk->intervals[i].gcmarkbit = 0; |
d5e35230 JA |
5928 | } |
5929 | } | |
5930 | lim = INTERVAL_BLOCK_SIZE; | |
6ca94ac9 KH |
5931 | /* If this block contains only free intervals and we have already |
5932 | seen more than two blocks worth of free intervals then | |
5933 | deallocate this block. */ | |
6feef451 | 5934 | if (this_free == INTERVAL_BLOCK_SIZE && num_free > INTERVAL_BLOCK_SIZE) |
6ca94ac9 | 5935 | { |
6ca94ac9 KH |
5936 | *iprev = iblk->next; |
5937 | /* Unhook from the free list. */ | |
439d5cb4 | 5938 | interval_free_list = INTERVAL_PARENT (&iblk->intervals[0]); |
c8099634 RS |
5939 | lisp_free (iblk); |
5940 | n_interval_blocks--; | |
6ca94ac9 KH |
5941 | } |
5942 | else | |
6feef451 AS |
5943 | { |
5944 | num_free += this_free; | |
5945 | iprev = &iblk->next; | |
5946 | } | |
d5e35230 JA |
5947 | } |
5948 | total_intervals = num_used; | |
5949 | total_free_intervals = num_free; | |
5950 | } | |
d5e35230 | 5951 | |
7146af97 JB |
5952 | /* Put all unmarked symbols on free list */ |
5953 | { | |
5954 | register struct symbol_block *sblk; | |
6ca94ac9 | 5955 | struct symbol_block **sprev = &symbol_block; |
7146af97 JB |
5956 | register int lim = symbol_block_index; |
5957 | register int num_free = 0, num_used = 0; | |
5958 | ||
d285b373 | 5959 | symbol_free_list = NULL; |
177c0ea7 | 5960 | |
6ca94ac9 | 5961 | for (sblk = symbol_block; sblk; sblk = *sprev) |
7146af97 | 5962 | { |
6ca94ac9 | 5963 | int this_free = 0; |
d285b373 GM |
5964 | struct Lisp_Symbol *sym = sblk->symbols; |
5965 | struct Lisp_Symbol *end = sym + lim; | |
5966 | ||
5967 | for (; sym < end; ++sym) | |
5968 | { | |
20035321 SM |
5969 | /* Check if the symbol was created during loadup. In such a case |
5970 | it might be pointed to by pure bytecode which we don't trace, | |
5971 | so we conservatively assume that it is live. */ | |
8fe5665d | 5972 | int pure_p = PURE_POINTER_P (XSTRING (sym->xname)); |
177c0ea7 | 5973 | |
2336fe58 | 5974 | if (!sym->gcmarkbit && !pure_p) |
d285b373 | 5975 | { |
ce5b453a SM |
5976 | if (sym->redirect == SYMBOL_LOCALIZED) |
5977 | xfree (SYMBOL_BLV (sym)); | |
28a099a4 | 5978 | sym->next = symbol_free_list; |
d285b373 | 5979 | symbol_free_list = sym; |
34400008 | 5980 | #if GC_MARK_STACK |
d285b373 | 5981 | symbol_free_list->function = Vdead; |
34400008 | 5982 | #endif |
d285b373 GM |
5983 | ++this_free; |
5984 | } | |
5985 | else | |
5986 | { | |
5987 | ++num_used; | |
5988 | if (!pure_p) | |
8fe5665d | 5989 | UNMARK_STRING (XSTRING (sym->xname)); |
2336fe58 | 5990 | sym->gcmarkbit = 0; |
d285b373 GM |
5991 | } |
5992 | } | |
177c0ea7 | 5993 | |
7146af97 | 5994 | lim = SYMBOL_BLOCK_SIZE; |
6ca94ac9 KH |
5995 | /* If this block contains only free symbols and we have already |
5996 | seen more than two blocks worth of free symbols then deallocate | |
5997 | this block. */ | |
6feef451 | 5998 | if (this_free == SYMBOL_BLOCK_SIZE && num_free > SYMBOL_BLOCK_SIZE) |
6ca94ac9 | 5999 | { |
6ca94ac9 KH |
6000 | *sprev = sblk->next; |
6001 | /* Unhook from the free list. */ | |
28a099a4 | 6002 | symbol_free_list = sblk->symbols[0].next; |
c8099634 RS |
6003 | lisp_free (sblk); |
6004 | n_symbol_blocks--; | |
6ca94ac9 KH |
6005 | } |
6006 | else | |
6feef451 AS |
6007 | { |
6008 | num_free += this_free; | |
6009 | sprev = &sblk->next; | |
6010 | } | |
7146af97 JB |
6011 | } |
6012 | total_symbols = num_used; | |
6013 | total_free_symbols = num_free; | |
6014 | } | |
6015 | ||
a9faeabe RS |
6016 | /* Put all unmarked misc's on free list. |
6017 | For a marker, first unchain it from the buffer it points into. */ | |
7146af97 JB |
6018 | { |
6019 | register struct marker_block *mblk; | |
6ca94ac9 | 6020 | struct marker_block **mprev = &marker_block; |
7146af97 JB |
6021 | register int lim = marker_block_index; |
6022 | register int num_free = 0, num_used = 0; | |
6023 | ||
6024 | marker_free_list = 0; | |
177c0ea7 | 6025 | |
6ca94ac9 | 6026 | for (mblk = marker_block; mblk; mblk = *mprev) |
7146af97 JB |
6027 | { |
6028 | register int i; | |
6ca94ac9 | 6029 | int this_free = 0; |
fa05e253 | 6030 | |
7146af97 | 6031 | for (i = 0; i < lim; i++) |
465edf35 | 6032 | { |
d314756e | 6033 | if (!mblk->markers[i].u_any.gcmarkbit) |
465edf35 | 6034 | { |
d314756e | 6035 | if (mblk->markers[i].u_any.type == Lisp_Misc_Marker) |
ef89c2ce | 6036 | unchain_marker (&mblk->markers[i].u_marker); |
fa05e253 RS |
6037 | /* Set the type of the freed object to Lisp_Misc_Free. |
6038 | We could leave the type alone, since nobody checks it, | |
465edf35 | 6039 | but this might catch bugs faster. */ |
a5da44fe | 6040 | mblk->markers[i].u_marker.type = Lisp_Misc_Free; |
465edf35 KH |
6041 | mblk->markers[i].u_free.chain = marker_free_list; |
6042 | marker_free_list = &mblk->markers[i]; | |
6ca94ac9 | 6043 | this_free++; |
465edf35 KH |
6044 | } |
6045 | else | |
6046 | { | |
6047 | num_used++; | |
d314756e | 6048 | mblk->markers[i].u_any.gcmarkbit = 0; |
465edf35 KH |
6049 | } |
6050 | } | |
7146af97 | 6051 | lim = MARKER_BLOCK_SIZE; |
6ca94ac9 KH |
6052 | /* If this block contains only free markers and we have already |
6053 | seen more than two blocks worth of free markers then deallocate | |
6054 | this block. */ | |
6feef451 | 6055 | if (this_free == MARKER_BLOCK_SIZE && num_free > MARKER_BLOCK_SIZE) |
6ca94ac9 | 6056 | { |
6ca94ac9 KH |
6057 | *mprev = mblk->next; |
6058 | /* Unhook from the free list. */ | |
6059 | marker_free_list = mblk->markers[0].u_free.chain; | |
c8099634 RS |
6060 | lisp_free (mblk); |
6061 | n_marker_blocks--; | |
6ca94ac9 KH |
6062 | } |
6063 | else | |
6feef451 AS |
6064 | { |
6065 | num_free += this_free; | |
6066 | mprev = &mblk->next; | |
6067 | } | |
7146af97 JB |
6068 | } |
6069 | ||
6070 | total_markers = num_used; | |
6071 | total_free_markers = num_free; | |
6072 | } | |
6073 | ||
6074 | /* Free all unmarked buffers */ | |
6075 | { | |
6076 | register struct buffer *buffer = all_buffers, *prev = 0, *next; | |
6077 | ||
6078 | while (buffer) | |
3ef06d12 | 6079 | if (!VECTOR_MARKED_P (buffer)) |
7146af97 JB |
6080 | { |
6081 | if (prev) | |
6082 | prev->next = buffer->next; | |
6083 | else | |
6084 | all_buffers = buffer->next; | |
6085 | next = buffer->next; | |
34400008 | 6086 | lisp_free (buffer); |
7146af97 JB |
6087 | buffer = next; |
6088 | } | |
6089 | else | |
6090 | { | |
3ef06d12 | 6091 | VECTOR_UNMARK (buffer); |
30e3190a | 6092 | UNMARK_BALANCE_INTERVALS (BUF_INTERVALS (buffer)); |
7146af97 JB |
6093 | prev = buffer, buffer = buffer->next; |
6094 | } | |
6095 | } | |
6096 | ||
7146af97 JB |
6097 | /* Free all unmarked vectors */ |
6098 | { | |
6099 | register struct Lisp_Vector *vector = all_vectors, *prev = 0, *next; | |
6100 | total_vector_size = 0; | |
6101 | ||
6102 | while (vector) | |
3ef06d12 | 6103 | if (!VECTOR_MARKED_P (vector)) |
7146af97 JB |
6104 | { |
6105 | if (prev) | |
6106 | prev->next = vector->next; | |
6107 | else | |
6108 | all_vectors = vector->next; | |
6109 | next = vector->next; | |
c8099634 RS |
6110 | lisp_free (vector); |
6111 | n_vectors--; | |
7146af97 | 6112 | vector = next; |
41c28a37 | 6113 | |
7146af97 JB |
6114 | } |
6115 | else | |
6116 | { | |
3ef06d12 | 6117 | VECTOR_UNMARK (vector); |
fa05e253 RS |
6118 | if (vector->size & PSEUDOVECTOR_FLAG) |
6119 | total_vector_size += (PSEUDOVECTOR_SIZE_MASK & vector->size); | |
6120 | else | |
6121 | total_vector_size += vector->size; | |
7146af97 JB |
6122 | prev = vector, vector = vector->next; |
6123 | } | |
6124 | } | |
177c0ea7 | 6125 | |
676a7251 GM |
6126 | #ifdef GC_CHECK_STRING_BYTES |
6127 | if (!noninteractive) | |
6128 | check_string_bytes (1); | |
6129 | #endif | |
7146af97 | 6130 | } |
7146af97 | 6131 | |
7146af97 | 6132 | |
7146af97 | 6133 | |
7146af97 | 6134 | \f |
20d24714 JB |
6135 | /* Debugging aids. */ |
6136 | ||
31ce1c91 | 6137 | DEFUN ("memory-limit", Fmemory_limit, Smemory_limit, 0, 0, 0, |
a6266d23 | 6138 | doc: /* Return the address of the last byte Emacs has allocated, divided by 1024. |
228299fa | 6139 | This may be helpful in debugging Emacs's memory usage. |
7ee72033 | 6140 | We divide the value by 1024 to make sure it fits in a Lisp integer. */) |
5842a27b | 6141 | (void) |
20d24714 JB |
6142 | { |
6143 | Lisp_Object end; | |
6144 | ||
45d12a89 | 6145 | XSETINT (end, (EMACS_INT) sbrk (0) / 1024); |
20d24714 JB |
6146 | |
6147 | return end; | |
6148 | } | |
6149 | ||
310ea200 | 6150 | DEFUN ("memory-use-counts", Fmemory_use_counts, Smemory_use_counts, 0, 0, 0, |
a6266d23 | 6151 | doc: /* Return a list of counters that measure how much consing there has been. |
228299fa GM |
6152 | Each of these counters increments for a certain kind of object. |
6153 | The counters wrap around from the largest positive integer to zero. | |
6154 | Garbage collection does not decrease them. | |
6155 | The elements of the value are as follows: | |
6156 | (CONSES FLOATS VECTOR-CELLS SYMBOLS STRING-CHARS MISCS INTERVALS STRINGS) | |
6157 | All are in units of 1 = one object consed | |
6158 | except for VECTOR-CELLS and STRING-CHARS, which count the total length of | |
6159 | objects consed. | |
6160 | MISCS include overlays, markers, and some internal types. | |
6161 | Frames, windows, buffers, and subprocesses count as vectors | |
7ee72033 | 6162 | (but the contents of a buffer's text do not count here). */) |
5842a27b | 6163 | (void) |
310ea200 | 6164 | { |
2e471eb5 | 6165 | Lisp_Object consed[8]; |
310ea200 | 6166 | |
78e985eb GM |
6167 | consed[0] = make_number (min (MOST_POSITIVE_FIXNUM, cons_cells_consed)); |
6168 | consed[1] = make_number (min (MOST_POSITIVE_FIXNUM, floats_consed)); | |
6169 | consed[2] = make_number (min (MOST_POSITIVE_FIXNUM, vector_cells_consed)); | |
6170 | consed[3] = make_number (min (MOST_POSITIVE_FIXNUM, symbols_consed)); | |
6171 | consed[4] = make_number (min (MOST_POSITIVE_FIXNUM, string_chars_consed)); | |
6172 | consed[5] = make_number (min (MOST_POSITIVE_FIXNUM, misc_objects_consed)); | |
6173 | consed[6] = make_number (min (MOST_POSITIVE_FIXNUM, intervals_consed)); | |
6174 | consed[7] = make_number (min (MOST_POSITIVE_FIXNUM, strings_consed)); | |
310ea200 | 6175 | |
2e471eb5 | 6176 | return Flist (8, consed); |
310ea200 | 6177 | } |
e0b8c689 KR |
6178 | |
6179 | int suppress_checking; | |
d3d47262 | 6180 | |
e0b8c689 | 6181 | void |
971de7fb | 6182 | die (const char *msg, const char *file, int line) |
e0b8c689 | 6183 | { |
67ee9f6e | 6184 | fprintf (stderr, "\r\n%s:%d: Emacs fatal error: %s\r\n", |
e0b8c689 KR |
6185 | file, line, msg); |
6186 | abort (); | |
6187 | } | |
20d24714 | 6188 | \f |
7146af97 JB |
6189 | /* Initialization */ |
6190 | ||
dfcf069d | 6191 | void |
971de7fb | 6192 | init_alloc_once (void) |
7146af97 JB |
6193 | { |
6194 | /* Used to do Vpurify_flag = Qt here, but Qt isn't set up yet! */ | |
9e713715 GM |
6195 | purebeg = PUREBEG; |
6196 | pure_size = PURESIZE; | |
1f0b3fd2 | 6197 | pure_bytes_used = 0; |
e5bc14d4 | 6198 | pure_bytes_used_lisp = pure_bytes_used_non_lisp = 0; |
9e713715 GM |
6199 | pure_bytes_used_before_overflow = 0; |
6200 | ||
ab6780cd SM |
6201 | /* Initialize the list of free aligned blocks. */ |
6202 | free_ablock = NULL; | |
6203 | ||
877935b1 | 6204 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
34400008 GM |
6205 | mem_init (); |
6206 | Vdead = make_pure_string ("DEAD", 4, 4, 0); | |
6207 | #endif | |
9e713715 | 6208 | |
7146af97 JB |
6209 | all_vectors = 0; |
6210 | ignore_warnings = 1; | |
d1658221 RS |
6211 | #ifdef DOUG_LEA_MALLOC |
6212 | mallopt (M_TRIM_THRESHOLD, 128*1024); /* trim threshold */ | |
6213 | mallopt (M_MMAP_THRESHOLD, 64*1024); /* mmap threshold */ | |
81d492d5 | 6214 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); /* max. number of mmap'ed areas */ |
d1658221 | 6215 | #endif |
7146af97 JB |
6216 | init_strings (); |
6217 | init_cons (); | |
6218 | init_symbol (); | |
6219 | init_marker (); | |
7146af97 | 6220 | init_float (); |
34400008 | 6221 | init_intervals (); |
5ac58e4c | 6222 | init_weak_hash_tables (); |
d5e35230 | 6223 | |
276cbe5a RS |
6224 | #ifdef REL_ALLOC |
6225 | malloc_hysteresis = 32; | |
6226 | #else | |
6227 | malloc_hysteresis = 0; | |
6228 | #endif | |
6229 | ||
24d8a105 | 6230 | refill_memory_reserve (); |
276cbe5a | 6231 | |
7146af97 JB |
6232 | ignore_warnings = 0; |
6233 | gcprolist = 0; | |
630686c8 | 6234 | byte_stack_list = 0; |
7146af97 JB |
6235 | staticidx = 0; |
6236 | consing_since_gc = 0; | |
7d179cea | 6237 | gc_cons_threshold = 100000 * sizeof (Lisp_Object); |
974aae61 | 6238 | gc_relative_threshold = 0; |
7146af97 JB |
6239 | } |
6240 | ||
dfcf069d | 6241 | void |
971de7fb | 6242 | init_alloc (void) |
7146af97 JB |
6243 | { |
6244 | gcprolist = 0; | |
630686c8 | 6245 | byte_stack_list = 0; |
182ff242 GM |
6246 | #if GC_MARK_STACK |
6247 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
6248 | setjmp_tested_p = longjmps_done = 0; | |
6249 | #endif | |
6250 | #endif | |
2c5bd608 DL |
6251 | Vgc_elapsed = make_float (0.0); |
6252 | gcs_done = 0; | |
7146af97 JB |
6253 | } |
6254 | ||
6255 | void | |
971de7fb | 6256 | syms_of_alloc (void) |
7146af97 | 6257 | { |
7ee72033 | 6258 | DEFVAR_INT ("gc-cons-threshold", &gc_cons_threshold, |
a6266d23 | 6259 | doc: /* *Number of bytes of consing between garbage collections. |
228299fa GM |
6260 | Garbage collection can happen automatically once this many bytes have been |
6261 | allocated since the last garbage collection. All data types count. | |
7146af97 | 6262 | |
228299fa | 6263 | Garbage collection happens automatically only when `eval' is called. |
7146af97 | 6264 | |
228299fa | 6265 | By binding this temporarily to a large number, you can effectively |
96f077ad SM |
6266 | prevent garbage collection during a part of the program. |
6267 | See also `gc-cons-percentage'. */); | |
6268 | ||
6269 | DEFVAR_LISP ("gc-cons-percentage", &Vgc_cons_percentage, | |
6270 | doc: /* *Portion of the heap used for allocation. | |
6271 | Garbage collection can happen automatically once this portion of the heap | |
6272 | has been allocated since the last garbage collection. | |
6273 | If this portion is smaller than `gc-cons-threshold', this is ignored. */); | |
6274 | Vgc_cons_percentage = make_float (0.1); | |
0819585c | 6275 | |
7ee72033 | 6276 | DEFVAR_INT ("pure-bytes-used", &pure_bytes_used, |
a6266d23 | 6277 | doc: /* Number of bytes of sharable Lisp data allocated so far. */); |
0819585c | 6278 | |
7ee72033 | 6279 | DEFVAR_INT ("cons-cells-consed", &cons_cells_consed, |
a6266d23 | 6280 | doc: /* Number of cons cells that have been consed so far. */); |
0819585c | 6281 | |
7ee72033 | 6282 | DEFVAR_INT ("floats-consed", &floats_consed, |
a6266d23 | 6283 | doc: /* Number of floats that have been consed so far. */); |
0819585c | 6284 | |
7ee72033 | 6285 | DEFVAR_INT ("vector-cells-consed", &vector_cells_consed, |
a6266d23 | 6286 | doc: /* Number of vector cells that have been consed so far. */); |
0819585c | 6287 | |
7ee72033 | 6288 | DEFVAR_INT ("symbols-consed", &symbols_consed, |
a6266d23 | 6289 | doc: /* Number of symbols that have been consed so far. */); |
0819585c | 6290 | |
7ee72033 | 6291 | DEFVAR_INT ("string-chars-consed", &string_chars_consed, |
a6266d23 | 6292 | doc: /* Number of string characters that have been consed so far. */); |
0819585c | 6293 | |
7ee72033 | 6294 | DEFVAR_INT ("misc-objects-consed", &misc_objects_consed, |
a6266d23 | 6295 | doc: /* Number of miscellaneous objects that have been consed so far. */); |
2e471eb5 | 6296 | |
7ee72033 | 6297 | DEFVAR_INT ("intervals-consed", &intervals_consed, |
a6266d23 | 6298 | doc: /* Number of intervals that have been consed so far. */); |
7146af97 | 6299 | |
7ee72033 | 6300 | DEFVAR_INT ("strings-consed", &strings_consed, |
a6266d23 | 6301 | doc: /* Number of strings that have been consed so far. */); |
228299fa | 6302 | |
7ee72033 | 6303 | DEFVAR_LISP ("purify-flag", &Vpurify_flag, |
a6266d23 | 6304 | doc: /* Non-nil means loading Lisp code in order to dump an executable. |
e9515805 SM |
6305 | This means that certain objects should be allocated in shared (pure) space. |
6306 | It can also be set to a hash-table, in which case this table is used to | |
6307 | do hash-consing of the objects allocated to pure space. */); | |
228299fa | 6308 | |
7ee72033 | 6309 | DEFVAR_BOOL ("garbage-collection-messages", &garbage_collection_messages, |
a6266d23 | 6310 | doc: /* Non-nil means display messages at start and end of garbage collection. */); |
299585ee RS |
6311 | garbage_collection_messages = 0; |
6312 | ||
7ee72033 | 6313 | DEFVAR_LISP ("post-gc-hook", &Vpost_gc_hook, |
a6266d23 | 6314 | doc: /* Hook run after garbage collection has finished. */); |
9e713715 | 6315 | Vpost_gc_hook = Qnil; |
d67b4f80 | 6316 | Qpost_gc_hook = intern_c_string ("post-gc-hook"); |
9e713715 GM |
6317 | staticpro (&Qpost_gc_hook); |
6318 | ||
74a54b04 RS |
6319 | DEFVAR_LISP ("memory-signal-data", &Vmemory_signal_data, |
6320 | doc: /* Precomputed `signal' argument for memory-full error. */); | |
bcb61d60 KH |
6321 | /* We build this in advance because if we wait until we need it, we might |
6322 | not be able to allocate the memory to hold it. */ | |
74a54b04 | 6323 | Vmemory_signal_data |
f4265f6c DN |
6324 | = pure_cons (Qerror, |
6325 | pure_cons (make_pure_c_string ("Memory exhausted--use M-x save-some-buffers then exit and restart Emacs"), Qnil)); | |
74a54b04 RS |
6326 | |
6327 | DEFVAR_LISP ("memory-full", &Vmemory_full, | |
24d8a105 | 6328 | doc: /* Non-nil means Emacs cannot get much more Lisp memory. */); |
74a54b04 | 6329 | Vmemory_full = Qnil; |
bcb61d60 | 6330 | |
e8197642 | 6331 | staticpro (&Qgc_cons_threshold); |
d67b4f80 | 6332 | Qgc_cons_threshold = intern_c_string ("gc-cons-threshold"); |
e8197642 | 6333 | |
a59de17b | 6334 | staticpro (&Qchar_table_extra_slots); |
d67b4f80 | 6335 | Qchar_table_extra_slots = intern_c_string ("char-table-extra-slots"); |
a59de17b | 6336 | |
2c5bd608 DL |
6337 | DEFVAR_LISP ("gc-elapsed", &Vgc_elapsed, |
6338 | doc: /* Accumulated time elapsed in garbage collections. | |
e7415487 | 6339 | The time is in seconds as a floating point value. */); |
2c5bd608 | 6340 | DEFVAR_INT ("gcs-done", &gcs_done, |
e7415487 | 6341 | doc: /* Accumulated number of garbage collections done. */); |
2c5bd608 | 6342 | |
7146af97 JB |
6343 | defsubr (&Scons); |
6344 | defsubr (&Slist); | |
6345 | defsubr (&Svector); | |
b9598260 | 6346 | defsubr (&Sfunvec); |
7146af97 JB |
6347 | defsubr (&Smake_byte_code); |
6348 | defsubr (&Smake_list); | |
6349 | defsubr (&Smake_vector); | |
6350 | defsubr (&Smake_string); | |
7b07587b | 6351 | defsubr (&Smake_bool_vector); |
7146af97 JB |
6352 | defsubr (&Smake_symbol); |
6353 | defsubr (&Smake_marker); | |
6354 | defsubr (&Spurecopy); | |
6355 | defsubr (&Sgarbage_collect); | |
20d24714 | 6356 | defsubr (&Smemory_limit); |
310ea200 | 6357 | defsubr (&Smemory_use_counts); |
34400008 GM |
6358 | |
6359 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
6360 | defsubr (&Sgc_status); | |
6361 | #endif | |
7146af97 | 6362 | } |
005ca5c7 DL |
6363 | |
6364 | /* arch-tag: 6695ca10-e3c5-4c2c-8bc3-ed26a7dda857 | |
6365 | (do not change this comment) */ |