Commit | Line | Data |
---|---|---|
7146af97 | 1 | /* Storage allocation and gc for GNU Emacs Lisp interpreter. |
126f9c02 | 2 | Copyright (C) 1985, 1986, 1988, 1993, 1994, 1995, 1997, 1998, 1999, |
cfb2f32e | 3 | 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. |
7146af97 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
7c299e7a | 9 | the Free Software Foundation; either version 2, or (at your option) |
7146af97 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
7146af97 | 21 | |
18160b98 | 22 | #include <config.h> |
e9b309ac | 23 | #include <stdio.h> |
ab6780cd | 24 | #include <limits.h> /* For CHAR_BIT. */ |
92939d31 | 25 | |
4455ad75 RS |
26 | #ifdef ALLOC_DEBUG |
27 | #undef INLINE | |
28 | #endif | |
29 | ||
68c45bf0 | 30 | /* Note that this declares bzero on OSF/1. How dumb. */ |
2e471eb5 | 31 | |
68c45bf0 | 32 | #include <signal.h> |
92939d31 | 33 | |
aa477689 JD |
34 | #ifdef HAVE_GTK_AND_PTHREAD |
35 | #include <pthread.h> | |
36 | #endif | |
37 | ||
7539e11f KR |
38 | /* This file is part of the core Lisp implementation, and thus must |
39 | deal with the real data structures. If the Lisp implementation is | |
40 | replaced, this file likely will not be used. */ | |
2e471eb5 | 41 | |
7539e11f | 42 | #undef HIDE_LISP_IMPLEMENTATION |
7146af97 | 43 | #include "lisp.h" |
ece93c02 | 44 | #include "process.h" |
d5e35230 | 45 | #include "intervals.h" |
4c0be5f4 | 46 | #include "puresize.h" |
7146af97 JB |
47 | #include "buffer.h" |
48 | #include "window.h" | |
2538fae4 | 49 | #include "keyboard.h" |
502b9b64 | 50 | #include "frame.h" |
9ac0d9e0 | 51 | #include "blockinput.h" |
e54daa22 | 52 | #include "charset.h" |
e065a56e | 53 | #include "syssignal.h" |
34400008 | 54 | #include <setjmp.h> |
e065a56e | 55 | |
ad5f3636 DL |
56 | /* GC_MALLOC_CHECK defined means perform validity checks of malloc'd |
57 | memory. Can do this only if using gmalloc.c. */ | |
58 | ||
59 | #if defined SYSTEM_MALLOC || defined DOUG_LEA_MALLOC | |
60 | #undef GC_MALLOC_CHECK | |
61 | #endif | |
62 | ||
bf952fb6 DL |
63 | #ifdef HAVE_UNISTD_H |
64 | #include <unistd.h> | |
65 | #else | |
66 | extern POINTER_TYPE *sbrk (); | |
67 | #endif | |
ee1eea5c | 68 | |
de7124a7 KS |
69 | #ifdef HAVE_FCNTL_H |
70 | #define INCLUDED_FCNTL | |
71 | #include <fcntl.h> | |
72 | #endif | |
73 | #ifndef O_WRONLY | |
74 | #define O_WRONLY 1 | |
75 | #endif | |
76 | ||
d1658221 | 77 | #ifdef DOUG_LEA_MALLOC |
2e471eb5 | 78 | |
d1658221 | 79 | #include <malloc.h> |
3e60b029 DL |
80 | /* malloc.h #defines this as size_t, at least in glibc2. */ |
81 | #ifndef __malloc_size_t | |
d1658221 | 82 | #define __malloc_size_t int |
3e60b029 | 83 | #endif |
81d492d5 | 84 | |
2e471eb5 GM |
85 | /* Specify maximum number of areas to mmap. It would be nice to use a |
86 | value that explicitly means "no limit". */ | |
87 | ||
81d492d5 RS |
88 | #define MMAP_MAX_AREAS 100000000 |
89 | ||
2e471eb5 GM |
90 | #else /* not DOUG_LEA_MALLOC */ |
91 | ||
276cbe5a RS |
92 | /* The following come from gmalloc.c. */ |
93 | ||
276cbe5a | 94 | #define __malloc_size_t size_t |
276cbe5a | 95 | extern __malloc_size_t _bytes_used; |
3e60b029 | 96 | extern __malloc_size_t __malloc_extra_blocks; |
2e471eb5 GM |
97 | |
98 | #endif /* not DOUG_LEA_MALLOC */ | |
276cbe5a | 99 | |
aa477689 JD |
100 | #if ! defined (SYSTEM_MALLOC) && defined (HAVE_GTK_AND_PTHREAD) |
101 | ||
f415cacd JD |
102 | /* When GTK uses the file chooser dialog, different backends can be loaded |
103 | dynamically. One such a backend is the Gnome VFS backend that gets loaded | |
104 | if you run Gnome. That backend creates several threads and also allocates | |
105 | memory with malloc. | |
106 | ||
107 | If Emacs sets malloc hooks (! SYSTEM_MALLOC) and the emacs_blocked_* | |
108 | functions below are called from malloc, there is a chance that one | |
109 | of these threads preempts the Emacs main thread and the hook variables | |
333f1b6f | 110 | end up in an inconsistent state. So we have a mutex to prevent that (note |
f415cacd JD |
111 | that the backend handles concurrent access to malloc within its own threads |
112 | but Emacs code running in the main thread is not included in that control). | |
113 | ||
026cdede | 114 | When UNBLOCK_INPUT is called, reinvoke_input_signal may be called. If this |
f415cacd JD |
115 | happens in one of the backend threads we will have two threads that tries |
116 | to run Emacs code at once, and the code is not prepared for that. | |
117 | To prevent that, we only call BLOCK/UNBLOCK from the main thread. */ | |
118 | ||
aa477689 | 119 | static pthread_mutex_t alloc_mutex; |
aa477689 JD |
120 | |
121 | #define BLOCK_INPUT_ALLOC \ | |
122 | do \ | |
123 | { \ | |
124 | pthread_mutex_lock (&alloc_mutex); \ | |
125 | if (pthread_self () == main_thread) \ | |
126 | BLOCK_INPUT; \ | |
127 | } \ | |
128 | while (0) | |
129 | #define UNBLOCK_INPUT_ALLOC \ | |
130 | do \ | |
131 | { \ | |
132 | if (pthread_self () == main_thread) \ | |
133 | UNBLOCK_INPUT; \ | |
134 | pthread_mutex_unlock (&alloc_mutex); \ | |
135 | } \ | |
136 | while (0) | |
137 | ||
138 | #else /* SYSTEM_MALLOC || not HAVE_GTK_AND_PTHREAD */ | |
139 | ||
140 | #define BLOCK_INPUT_ALLOC BLOCK_INPUT | |
141 | #define UNBLOCK_INPUT_ALLOC UNBLOCK_INPUT | |
142 | ||
143 | #endif /* SYSTEM_MALLOC || not HAVE_GTK_AND_PTHREAD */ | |
144 | ||
276cbe5a | 145 | /* Value of _bytes_used, when spare_memory was freed. */ |
2e471eb5 | 146 | |
276cbe5a RS |
147 | static __malloc_size_t bytes_used_when_full; |
148 | ||
4d74a5fc RS |
149 | static __malloc_size_t bytes_used_when_reconsidered; |
150 | ||
2e471eb5 GM |
151 | /* Mark, unmark, query mark bit of a Lisp string. S must be a pointer |
152 | to a struct Lisp_String. */ | |
153 | ||
7cdee936 SM |
154 | #define MARK_STRING(S) ((S)->size |= ARRAY_MARK_FLAG) |
155 | #define UNMARK_STRING(S) ((S)->size &= ~ARRAY_MARK_FLAG) | |
b059de99 | 156 | #define STRING_MARKED_P(S) (((S)->size & ARRAY_MARK_FLAG) != 0) |
2e471eb5 | 157 | |
3ef06d12 SM |
158 | #define VECTOR_MARK(V) ((V)->size |= ARRAY_MARK_FLAG) |
159 | #define VECTOR_UNMARK(V) ((V)->size &= ~ARRAY_MARK_FLAG) | |
b059de99 | 160 | #define VECTOR_MARKED_P(V) (((V)->size & ARRAY_MARK_FLAG) != 0) |
3ef06d12 | 161 | |
2e471eb5 GM |
162 | /* Value is the number of bytes/chars of S, a pointer to a struct |
163 | Lisp_String. This must be used instead of STRING_BYTES (S) or | |
164 | S->size during GC, because S->size contains the mark bit for | |
165 | strings. */ | |
166 | ||
3ef06d12 | 167 | #define GC_STRING_BYTES(S) (STRING_BYTES (S)) |
7cdee936 | 168 | #define GC_STRING_CHARS(S) ((S)->size & ~ARRAY_MARK_FLAG) |
2e471eb5 GM |
169 | |
170 | /* Number of bytes of consing done since the last gc. */ | |
171 | ||
7146af97 JB |
172 | int consing_since_gc; |
173 | ||
310ea200 | 174 | /* Count the amount of consing of various sorts of space. */ |
2e471eb5 | 175 | |
31ade731 SM |
176 | EMACS_INT cons_cells_consed; |
177 | EMACS_INT floats_consed; | |
178 | EMACS_INT vector_cells_consed; | |
179 | EMACS_INT symbols_consed; | |
180 | EMACS_INT string_chars_consed; | |
181 | EMACS_INT misc_objects_consed; | |
182 | EMACS_INT intervals_consed; | |
183 | EMACS_INT strings_consed; | |
2e471eb5 | 184 | |
974aae61 RS |
185 | /* Minimum number of bytes of consing since GC before next GC. */ |
186 | ||
187 | EMACS_INT gc_cons_threshold; | |
188 | ||
189 | /* Similar minimum, computed from Vgc_cons_percentage. */ | |
190 | ||
191 | EMACS_INT gc_relative_threshold; | |
310ea200 | 192 | |
96f077ad | 193 | static Lisp_Object Vgc_cons_percentage; |
7146af97 | 194 | |
24d8a105 RS |
195 | /* Minimum number of bytes of consing since GC before next GC, |
196 | when memory is full. */ | |
197 | ||
198 | EMACS_INT memory_full_cons_threshold; | |
199 | ||
2e471eb5 GM |
200 | /* Nonzero during GC. */ |
201 | ||
7146af97 JB |
202 | int gc_in_progress; |
203 | ||
3de0effb RS |
204 | /* Nonzero means abort if try to GC. |
205 | This is for code which is written on the assumption that | |
206 | no GC will happen, so as to verify that assumption. */ | |
207 | ||
208 | int abort_on_gc; | |
209 | ||
299585ee | 210 | /* Nonzero means display messages at beginning and end of GC. */ |
2e471eb5 | 211 | |
299585ee RS |
212 | int garbage_collection_messages; |
213 | ||
7146af97 JB |
214 | #ifndef VIRT_ADDR_VARIES |
215 | extern | |
216 | #endif /* VIRT_ADDR_VARIES */ | |
2e471eb5 | 217 | int malloc_sbrk_used; |
7146af97 JB |
218 | |
219 | #ifndef VIRT_ADDR_VARIES | |
220 | extern | |
221 | #endif /* VIRT_ADDR_VARIES */ | |
2e471eb5 | 222 | int malloc_sbrk_unused; |
7146af97 | 223 | |
34400008 GM |
224 | /* Number of live and free conses etc. */ |
225 | ||
226 | static int total_conses, total_markers, total_symbols, total_vector_size; | |
227 | static int total_free_conses, total_free_markers, total_free_symbols; | |
228 | static int total_free_floats, total_floats; | |
fd27a537 | 229 | |
2e471eb5 | 230 | /* Points to memory space allocated as "spare", to be freed if we run |
24d8a105 RS |
231 | out of memory. We keep one large block, four cons-blocks, and |
232 | two string blocks. */ | |
2e471eb5 | 233 | |
24d8a105 | 234 | char *spare_memory[7]; |
276cbe5a | 235 | |
24d8a105 | 236 | /* Amount of spare memory to keep in large reserve block. */ |
2e471eb5 | 237 | |
276cbe5a RS |
238 | #define SPARE_MEMORY (1 << 14) |
239 | ||
240 | /* Number of extra blocks malloc should get when it needs more core. */ | |
2e471eb5 | 241 | |
276cbe5a RS |
242 | static int malloc_hysteresis; |
243 | ||
2e471eb5 GM |
244 | /* Non-nil means defun should do purecopy on the function definition. */ |
245 | ||
7146af97 JB |
246 | Lisp_Object Vpurify_flag; |
247 | ||
74a54b04 RS |
248 | /* Non-nil means we are handling a memory-full error. */ |
249 | ||
250 | Lisp_Object Vmemory_full; | |
251 | ||
7146af97 | 252 | #ifndef HAVE_SHM |
2e471eb5 | 253 | |
1b8950e5 RS |
254 | /* Initialize it to a nonzero value to force it into data space |
255 | (rather than bss space). That way unexec will remap it into text | |
256 | space (pure), on some systems. We have not implemented the | |
257 | remapping on more recent systems because this is less important | |
258 | nowadays than in the days of small memories and timesharing. */ | |
2e471eb5 | 259 | |
379b98b1 | 260 | EMACS_INT pure[PURESIZE / sizeof (EMACS_INT)] = {1,}; |
7146af97 | 261 | #define PUREBEG (char *) pure |
2e471eb5 | 262 | |
9e713715 | 263 | #else /* HAVE_SHM */ |
2e471eb5 | 264 | |
7146af97 JB |
265 | #define pure PURE_SEG_BITS /* Use shared memory segment */ |
266 | #define PUREBEG (char *)PURE_SEG_BITS | |
4c0be5f4 | 267 | |
9e713715 | 268 | #endif /* HAVE_SHM */ |
2e471eb5 | 269 | |
9e713715 | 270 | /* Pointer to the pure area, and its size. */ |
2e471eb5 | 271 | |
9e713715 GM |
272 | static char *purebeg; |
273 | static size_t pure_size; | |
274 | ||
275 | /* Number of bytes of pure storage used before pure storage overflowed. | |
276 | If this is non-zero, this implies that an overflow occurred. */ | |
277 | ||
278 | static size_t pure_bytes_used_before_overflow; | |
7146af97 | 279 | |
34400008 GM |
280 | /* Value is non-zero if P points into pure space. */ |
281 | ||
282 | #define PURE_POINTER_P(P) \ | |
283 | (((PNTR_COMPARISON_TYPE) (P) \ | |
9e713715 | 284 | < (PNTR_COMPARISON_TYPE) ((char *) purebeg + pure_size)) \ |
34400008 | 285 | && ((PNTR_COMPARISON_TYPE) (P) \ |
9e713715 | 286 | >= (PNTR_COMPARISON_TYPE) purebeg)) |
34400008 | 287 | |
2e471eb5 GM |
288 | /* Index in pure at which next pure object will be allocated.. */ |
289 | ||
31ade731 | 290 | EMACS_INT pure_bytes_used; |
7146af97 | 291 | |
2e471eb5 GM |
292 | /* If nonzero, this is a warning delivered by malloc and not yet |
293 | displayed. */ | |
294 | ||
7146af97 JB |
295 | char *pending_malloc_warning; |
296 | ||
bcb61d60 | 297 | /* Pre-computed signal argument for use when memory is exhausted. */ |
2e471eb5 | 298 | |
74a54b04 | 299 | Lisp_Object Vmemory_signal_data; |
bcb61d60 | 300 | |
7146af97 JB |
301 | /* Maximum amount of C stack to save when a GC happens. */ |
302 | ||
303 | #ifndef MAX_SAVE_STACK | |
304 | #define MAX_SAVE_STACK 16000 | |
305 | #endif | |
306 | ||
307 | /* Buffer in which we save a copy of the C stack at each GC. */ | |
308 | ||
309 | char *stack_copy; | |
310 | int stack_copy_size; | |
311 | ||
2e471eb5 GM |
312 | /* Non-zero means ignore malloc warnings. Set during initialization. |
313 | Currently not used. */ | |
314 | ||
7146af97 | 315 | int ignore_warnings; |
350273a4 | 316 | |
a59de17b | 317 | Lisp_Object Qgc_cons_threshold, Qchar_table_extra_slots; |
e8197642 | 318 | |
9e713715 GM |
319 | /* Hook run after GC has finished. */ |
320 | ||
321 | Lisp_Object Vpost_gc_hook, Qpost_gc_hook; | |
322 | ||
2c5bd608 DL |
323 | Lisp_Object Vgc_elapsed; /* accumulated elapsed time in GC */ |
324 | EMACS_INT gcs_done; /* accumulated GCs */ | |
325 | ||
2e471eb5 | 326 | static void mark_buffer P_ ((Lisp_Object)); |
6793bc63 | 327 | extern void mark_kboards P_ ((void)); |
b40ea20a | 328 | extern void mark_backtrace P_ ((void)); |
2e471eb5 | 329 | static void gc_sweep P_ ((void)); |
41c28a37 GM |
330 | static void mark_glyph_matrix P_ ((struct glyph_matrix *)); |
331 | static void mark_face_cache P_ ((struct face_cache *)); | |
332 | ||
333 | #ifdef HAVE_WINDOW_SYSTEM | |
454d7973 | 334 | extern void mark_fringe_data P_ ((void)); |
41c28a37 GM |
335 | static void mark_image P_ ((struct image *)); |
336 | static void mark_image_cache P_ ((struct frame *)); | |
337 | #endif /* HAVE_WINDOW_SYSTEM */ | |
338 | ||
2e471eb5 GM |
339 | static struct Lisp_String *allocate_string P_ ((void)); |
340 | static void compact_small_strings P_ ((void)); | |
341 | static void free_large_strings P_ ((void)); | |
342 | static void sweep_strings P_ ((void)); | |
7da0b0d3 RS |
343 | |
344 | extern int message_enable_multibyte; | |
34400008 | 345 | |
34400008 GM |
346 | /* When scanning the C stack for live Lisp objects, Emacs keeps track |
347 | of what memory allocated via lisp_malloc is intended for what | |
348 | purpose. This enumeration specifies the type of memory. */ | |
349 | ||
350 | enum mem_type | |
351 | { | |
352 | MEM_TYPE_NON_LISP, | |
353 | MEM_TYPE_BUFFER, | |
354 | MEM_TYPE_CONS, | |
355 | MEM_TYPE_STRING, | |
356 | MEM_TYPE_MISC, | |
357 | MEM_TYPE_SYMBOL, | |
358 | MEM_TYPE_FLOAT, | |
ece93c02 GM |
359 | /* Keep the following vector-like types together, with |
360 | MEM_TYPE_WINDOW being the last, and MEM_TYPE_VECTOR the | |
361 | first. Or change the code of live_vector_p, for instance. */ | |
362 | MEM_TYPE_VECTOR, | |
363 | MEM_TYPE_PROCESS, | |
364 | MEM_TYPE_HASH_TABLE, | |
365 | MEM_TYPE_FRAME, | |
366 | MEM_TYPE_WINDOW | |
34400008 GM |
367 | }; |
368 | ||
24d8a105 RS |
369 | static POINTER_TYPE *lisp_align_malloc P_ ((size_t, enum mem_type)); |
370 | static POINTER_TYPE *lisp_malloc P_ ((size_t, enum mem_type)); | |
225ccad6 RS |
371 | void refill_memory_reserve (); |
372 | ||
24d8a105 | 373 | |
877935b1 | 374 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
0b378936 GM |
375 | |
376 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
377 | #include <stdio.h> /* For fprintf. */ | |
378 | #endif | |
379 | ||
380 | /* A unique object in pure space used to make some Lisp objects | |
381 | on free lists recognizable in O(1). */ | |
382 | ||
383 | Lisp_Object Vdead; | |
384 | ||
877935b1 GM |
385 | #ifdef GC_MALLOC_CHECK |
386 | ||
387 | enum mem_type allocated_mem_type; | |
388 | int dont_register_blocks; | |
389 | ||
390 | #endif /* GC_MALLOC_CHECK */ | |
391 | ||
392 | /* A node in the red-black tree describing allocated memory containing | |
393 | Lisp data. Each such block is recorded with its start and end | |
394 | address when it is allocated, and removed from the tree when it | |
395 | is freed. | |
396 | ||
397 | A red-black tree is a balanced binary tree with the following | |
398 | properties: | |
399 | ||
400 | 1. Every node is either red or black. | |
401 | 2. Every leaf is black. | |
402 | 3. If a node is red, then both of its children are black. | |
403 | 4. Every simple path from a node to a descendant leaf contains | |
404 | the same number of black nodes. | |
405 | 5. The root is always black. | |
406 | ||
407 | When nodes are inserted into the tree, or deleted from the tree, | |
408 | the tree is "fixed" so that these properties are always true. | |
409 | ||
410 | A red-black tree with N internal nodes has height at most 2 | |
411 | log(N+1). Searches, insertions and deletions are done in O(log N). | |
412 | Please see a text book about data structures for a detailed | |
413 | description of red-black trees. Any book worth its salt should | |
414 | describe them. */ | |
415 | ||
416 | struct mem_node | |
417 | { | |
9f7d9210 RS |
418 | /* Children of this node. These pointers are never NULL. When there |
419 | is no child, the value is MEM_NIL, which points to a dummy node. */ | |
420 | struct mem_node *left, *right; | |
421 | ||
422 | /* The parent of this node. In the root node, this is NULL. */ | |
423 | struct mem_node *parent; | |
877935b1 GM |
424 | |
425 | /* Start and end of allocated region. */ | |
426 | void *start, *end; | |
427 | ||
428 | /* Node color. */ | |
429 | enum {MEM_BLACK, MEM_RED} color; | |
177c0ea7 | 430 | |
877935b1 GM |
431 | /* Memory type. */ |
432 | enum mem_type type; | |
433 | }; | |
434 | ||
435 | /* Base address of stack. Set in main. */ | |
436 | ||
437 | Lisp_Object *stack_base; | |
438 | ||
439 | /* Root of the tree describing allocated Lisp memory. */ | |
440 | ||
441 | static struct mem_node *mem_root; | |
442 | ||
ece93c02 GM |
443 | /* Lowest and highest known address in the heap. */ |
444 | ||
445 | static void *min_heap_address, *max_heap_address; | |
446 | ||
877935b1 GM |
447 | /* Sentinel node of the tree. */ |
448 | ||
449 | static struct mem_node mem_z; | |
450 | #define MEM_NIL &mem_z | |
451 | ||
b3303f74 | 452 | static POINTER_TYPE *lisp_malloc P_ ((size_t, enum mem_type)); |
ece93c02 | 453 | static struct Lisp_Vector *allocate_vectorlike P_ ((EMACS_INT, enum mem_type)); |
bf952fb6 | 454 | static void lisp_free P_ ((POINTER_TYPE *)); |
34400008 | 455 | static void mark_stack P_ ((void)); |
34400008 GM |
456 | static int live_vector_p P_ ((struct mem_node *, void *)); |
457 | static int live_buffer_p P_ ((struct mem_node *, void *)); | |
458 | static int live_string_p P_ ((struct mem_node *, void *)); | |
459 | static int live_cons_p P_ ((struct mem_node *, void *)); | |
460 | static int live_symbol_p P_ ((struct mem_node *, void *)); | |
461 | static int live_float_p P_ ((struct mem_node *, void *)); | |
462 | static int live_misc_p P_ ((struct mem_node *, void *)); | |
182ff242 | 463 | static void mark_maybe_object P_ ((Lisp_Object)); |
34400008 GM |
464 | static void mark_memory P_ ((void *, void *)); |
465 | static void mem_init P_ ((void)); | |
466 | static struct mem_node *mem_insert P_ ((void *, void *, enum mem_type)); | |
467 | static void mem_insert_fixup P_ ((struct mem_node *)); | |
468 | static void mem_rotate_left P_ ((struct mem_node *)); | |
469 | static void mem_rotate_right P_ ((struct mem_node *)); | |
470 | static void mem_delete P_ ((struct mem_node *)); | |
471 | static void mem_delete_fixup P_ ((struct mem_node *)); | |
472 | static INLINE struct mem_node *mem_find P_ ((void *)); | |
24d8a105 | 473 | |
34400008 GM |
474 | |
475 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
476 | static void check_gcpros P_ ((void)); | |
477 | #endif | |
478 | ||
877935b1 | 479 | #endif /* GC_MARK_STACK || GC_MALLOC_CHECK */ |
34400008 | 480 | |
1f0b3fd2 GM |
481 | /* Recording what needs to be marked for gc. */ |
482 | ||
483 | struct gcpro *gcprolist; | |
484 | ||
379b98b1 PE |
485 | /* Addresses of staticpro'd variables. Initialize it to a nonzero |
486 | value; otherwise some compilers put it into BSS. */ | |
1f0b3fd2 | 487 | |
382d38fa | 488 | #define NSTATICS 1280 |
379b98b1 | 489 | Lisp_Object *staticvec[NSTATICS] = {&Vpurify_flag}; |
1f0b3fd2 GM |
490 | |
491 | /* Index of next unused slot in staticvec. */ | |
492 | ||
493 | int staticidx = 0; | |
494 | ||
495 | static POINTER_TYPE *pure_alloc P_ ((size_t, int)); | |
496 | ||
497 | ||
498 | /* Value is SZ rounded up to the next multiple of ALIGNMENT. | |
499 | ALIGNMENT must be a power of 2. */ | |
500 | ||
ab6780cd SM |
501 | #define ALIGN(ptr, ALIGNMENT) \ |
502 | ((POINTER_TYPE *) ((((EMACS_UINT)(ptr)) + (ALIGNMENT) - 1) \ | |
503 | & ~((ALIGNMENT) - 1))) | |
1f0b3fd2 | 504 | |
ece93c02 | 505 | |
7146af97 | 506 | \f |
34400008 GM |
507 | /************************************************************************ |
508 | Malloc | |
509 | ************************************************************************/ | |
510 | ||
4455ad75 | 511 | /* Function malloc calls this if it finds we are near exhausting storage. */ |
d457598b AS |
512 | |
513 | void | |
7146af97 JB |
514 | malloc_warning (str) |
515 | char *str; | |
516 | { | |
517 | pending_malloc_warning = str; | |
518 | } | |
519 | ||
34400008 | 520 | |
4455ad75 | 521 | /* Display an already-pending malloc warning. */ |
34400008 | 522 | |
d457598b | 523 | void |
7146af97 JB |
524 | display_malloc_warning () |
525 | { | |
4455ad75 RS |
526 | call3 (intern ("display-warning"), |
527 | intern ("alloc"), | |
528 | build_string (pending_malloc_warning), | |
529 | intern ("emergency")); | |
7146af97 | 530 | pending_malloc_warning = 0; |
7146af97 JB |
531 | } |
532 | ||
34400008 | 533 | |
d1658221 | 534 | #ifdef DOUG_LEA_MALLOC |
4d74a5fc | 535 | # define BYTES_USED (mallinfo ().uordblks) |
d1658221 | 536 | #else |
1177ecf6 | 537 | # define BYTES_USED _bytes_used |
d1658221 | 538 | #endif |
49efed3a | 539 | \f |
276cbe5a RS |
540 | /* Called if we can't allocate relocatable space for a buffer. */ |
541 | ||
542 | void | |
543 | buffer_memory_full () | |
544 | { | |
2e471eb5 GM |
545 | /* If buffers use the relocating allocator, no need to free |
546 | spare_memory, because we may have plenty of malloc space left | |
547 | that we could get, and if we don't, the malloc that fails will | |
548 | itself cause spare_memory to be freed. If buffers don't use the | |
549 | relocating allocator, treat this like any other failing | |
550 | malloc. */ | |
276cbe5a RS |
551 | |
552 | #ifndef REL_ALLOC | |
553 | memory_full (); | |
554 | #endif | |
555 | ||
2e471eb5 GM |
556 | /* This used to call error, but if we've run out of memory, we could |
557 | get infinite recursion trying to build the string. */ | |
bcb61d60 | 558 | while (1) |
74a54b04 | 559 | Fsignal (Qnil, Vmemory_signal_data); |
7146af97 JB |
560 | } |
561 | ||
34400008 | 562 | |
212f33f1 KS |
563 | #ifdef XMALLOC_OVERRUN_CHECK |
564 | ||
bdbed949 KS |
565 | /* Check for overrun in malloc'ed buffers by wrapping a 16 byte header |
566 | and a 16 byte trailer around each block. | |
567 | ||
568 | The header consists of 12 fixed bytes + a 4 byte integer contaning the | |
569 | original block size, while the trailer consists of 16 fixed bytes. | |
570 | ||
571 | The header is used to detect whether this block has been allocated | |
572 | through these functions -- as it seems that some low-level libc | |
573 | functions may bypass the malloc hooks. | |
574 | */ | |
575 | ||
576 | ||
212f33f1 | 577 | #define XMALLOC_OVERRUN_CHECK_SIZE 16 |
bdbed949 | 578 | |
212f33f1 KS |
579 | static char xmalloc_overrun_check_header[XMALLOC_OVERRUN_CHECK_SIZE-4] = |
580 | { 0x9a, 0x9b, 0xae, 0xaf, | |
581 | 0xbf, 0xbe, 0xce, 0xcf, | |
582 | 0xea, 0xeb, 0xec, 0xed }; | |
583 | ||
584 | static char xmalloc_overrun_check_trailer[XMALLOC_OVERRUN_CHECK_SIZE] = | |
585 | { 0xaa, 0xab, 0xac, 0xad, | |
586 | 0xba, 0xbb, 0xbc, 0xbd, | |
587 | 0xca, 0xcb, 0xcc, 0xcd, | |
588 | 0xda, 0xdb, 0xdc, 0xdd }; | |
589 | ||
bdbed949 KS |
590 | /* Macros to insert and extract the block size in the header. */ |
591 | ||
592 | #define XMALLOC_PUT_SIZE(ptr, size) \ | |
593 | (ptr[-1] = (size & 0xff), \ | |
594 | ptr[-2] = ((size >> 8) & 0xff), \ | |
595 | ptr[-3] = ((size >> 16) & 0xff), \ | |
596 | ptr[-4] = ((size >> 24) & 0xff)) | |
597 | ||
598 | #define XMALLOC_GET_SIZE(ptr) \ | |
599 | (size_t)((unsigned)(ptr[-1]) | \ | |
600 | ((unsigned)(ptr[-2]) << 8) | \ | |
601 | ((unsigned)(ptr[-3]) << 16) | \ | |
602 | ((unsigned)(ptr[-4]) << 24)) | |
603 | ||
604 | ||
d8f165a8 JD |
605 | /* The call depth in overrun_check functions. For example, this might happen: |
606 | xmalloc() | |
607 | overrun_check_malloc() | |
608 | -> malloc -> (via hook)_-> emacs_blocked_malloc | |
609 | -> overrun_check_malloc | |
610 | call malloc (hooks are NULL, so real malloc is called). | |
611 | malloc returns 10000. | |
612 | add overhead, return 10016. | |
613 | <- (back in overrun_check_malloc) | |
857ae68b | 614 | add overhead again, return 10032 |
d8f165a8 | 615 | xmalloc returns 10032. |
857ae68b JD |
616 | |
617 | (time passes). | |
618 | ||
d8f165a8 JD |
619 | xfree(10032) |
620 | overrun_check_free(10032) | |
621 | decrease overhed | |
622 | free(10016) <- crash, because 10000 is the original pointer. */ | |
857ae68b JD |
623 | |
624 | static int check_depth; | |
625 | ||
bdbed949 KS |
626 | /* Like malloc, but wraps allocated block with header and trailer. */ |
627 | ||
212f33f1 KS |
628 | POINTER_TYPE * |
629 | overrun_check_malloc (size) | |
630 | size_t size; | |
631 | { | |
bdbed949 | 632 | register unsigned char *val; |
857ae68b | 633 | size_t overhead = ++check_depth == 1 ? XMALLOC_OVERRUN_CHECK_SIZE*2 : 0; |
212f33f1 | 634 | |
857ae68b JD |
635 | val = (unsigned char *) malloc (size + overhead); |
636 | if (val && check_depth == 1) | |
212f33f1 KS |
637 | { |
638 | bcopy (xmalloc_overrun_check_header, val, XMALLOC_OVERRUN_CHECK_SIZE - 4); | |
212f33f1 | 639 | val += XMALLOC_OVERRUN_CHECK_SIZE; |
bdbed949 | 640 | XMALLOC_PUT_SIZE(val, size); |
212f33f1 KS |
641 | bcopy (xmalloc_overrun_check_trailer, val + size, XMALLOC_OVERRUN_CHECK_SIZE); |
642 | } | |
857ae68b | 643 | --check_depth; |
212f33f1 KS |
644 | return (POINTER_TYPE *)val; |
645 | } | |
646 | ||
bdbed949 KS |
647 | |
648 | /* Like realloc, but checks old block for overrun, and wraps new block | |
649 | with header and trailer. */ | |
650 | ||
212f33f1 KS |
651 | POINTER_TYPE * |
652 | overrun_check_realloc (block, size) | |
653 | POINTER_TYPE *block; | |
654 | size_t size; | |
655 | { | |
bdbed949 | 656 | register unsigned char *val = (unsigned char *)block; |
857ae68b | 657 | size_t overhead = ++check_depth == 1 ? XMALLOC_OVERRUN_CHECK_SIZE*2 : 0; |
212f33f1 KS |
658 | |
659 | if (val | |
857ae68b | 660 | && check_depth == 1 |
212f33f1 KS |
661 | && bcmp (xmalloc_overrun_check_header, |
662 | val - XMALLOC_OVERRUN_CHECK_SIZE, | |
663 | XMALLOC_OVERRUN_CHECK_SIZE - 4) == 0) | |
664 | { | |
bdbed949 | 665 | size_t osize = XMALLOC_GET_SIZE (val); |
212f33f1 KS |
666 | if (bcmp (xmalloc_overrun_check_trailer, |
667 | val + osize, | |
668 | XMALLOC_OVERRUN_CHECK_SIZE)) | |
669 | abort (); | |
bdbed949 | 670 | bzero (val + osize, XMALLOC_OVERRUN_CHECK_SIZE); |
212f33f1 | 671 | val -= XMALLOC_OVERRUN_CHECK_SIZE; |
bdbed949 | 672 | bzero (val, XMALLOC_OVERRUN_CHECK_SIZE); |
212f33f1 KS |
673 | } |
674 | ||
857ae68b | 675 | val = (unsigned char *) realloc ((POINTER_TYPE *)val, size + overhead); |
212f33f1 | 676 | |
857ae68b | 677 | if (val && check_depth == 1) |
212f33f1 KS |
678 | { |
679 | bcopy (xmalloc_overrun_check_header, val, XMALLOC_OVERRUN_CHECK_SIZE - 4); | |
212f33f1 | 680 | val += XMALLOC_OVERRUN_CHECK_SIZE; |
bdbed949 | 681 | XMALLOC_PUT_SIZE(val, size); |
212f33f1 KS |
682 | bcopy (xmalloc_overrun_check_trailer, val + size, XMALLOC_OVERRUN_CHECK_SIZE); |
683 | } | |
857ae68b | 684 | --check_depth; |
212f33f1 KS |
685 | return (POINTER_TYPE *)val; |
686 | } | |
687 | ||
bdbed949 KS |
688 | /* Like free, but checks block for overrun. */ |
689 | ||
212f33f1 KS |
690 | void |
691 | overrun_check_free (block) | |
692 | POINTER_TYPE *block; | |
693 | { | |
bdbed949 | 694 | unsigned char *val = (unsigned char *)block; |
212f33f1 | 695 | |
857ae68b | 696 | ++check_depth; |
212f33f1 | 697 | if (val |
857ae68b | 698 | && check_depth == 1 |
212f33f1 KS |
699 | && bcmp (xmalloc_overrun_check_header, |
700 | val - XMALLOC_OVERRUN_CHECK_SIZE, | |
701 | XMALLOC_OVERRUN_CHECK_SIZE - 4) == 0) | |
702 | { | |
bdbed949 | 703 | size_t osize = XMALLOC_GET_SIZE (val); |
212f33f1 KS |
704 | if (bcmp (xmalloc_overrun_check_trailer, |
705 | val + osize, | |
706 | XMALLOC_OVERRUN_CHECK_SIZE)) | |
707 | abort (); | |
454d7973 KS |
708 | #ifdef XMALLOC_CLEAR_FREE_MEMORY |
709 | val -= XMALLOC_OVERRUN_CHECK_SIZE; | |
710 | memset (val, 0xff, osize + XMALLOC_OVERRUN_CHECK_SIZE*2); | |
711 | #else | |
bdbed949 | 712 | bzero (val + osize, XMALLOC_OVERRUN_CHECK_SIZE); |
212f33f1 | 713 | val -= XMALLOC_OVERRUN_CHECK_SIZE; |
bdbed949 | 714 | bzero (val, XMALLOC_OVERRUN_CHECK_SIZE); |
454d7973 | 715 | #endif |
212f33f1 KS |
716 | } |
717 | ||
718 | free (val); | |
857ae68b | 719 | --check_depth; |
212f33f1 KS |
720 | } |
721 | ||
722 | #undef malloc | |
723 | #undef realloc | |
724 | #undef free | |
725 | #define malloc overrun_check_malloc | |
726 | #define realloc overrun_check_realloc | |
727 | #define free overrun_check_free | |
728 | #endif | |
729 | ||
bdbed949 KS |
730 | |
731 | /* Like malloc but check for no memory and block interrupt input.. */ | |
732 | ||
c971ff9a | 733 | POINTER_TYPE * |
7146af97 | 734 | xmalloc (size) |
675d5130 | 735 | size_t size; |
7146af97 | 736 | { |
c971ff9a | 737 | register POINTER_TYPE *val; |
7146af97 | 738 | |
9ac0d9e0 | 739 | BLOCK_INPUT; |
c971ff9a | 740 | val = (POINTER_TYPE *) malloc (size); |
9ac0d9e0 | 741 | UNBLOCK_INPUT; |
7146af97 | 742 | |
2e471eb5 GM |
743 | if (!val && size) |
744 | memory_full (); | |
7146af97 JB |
745 | return val; |
746 | } | |
747 | ||
34400008 GM |
748 | |
749 | /* Like realloc but check for no memory and block interrupt input.. */ | |
750 | ||
c971ff9a | 751 | POINTER_TYPE * |
7146af97 | 752 | xrealloc (block, size) |
c971ff9a | 753 | POINTER_TYPE *block; |
675d5130 | 754 | size_t size; |
7146af97 | 755 | { |
c971ff9a | 756 | register POINTER_TYPE *val; |
7146af97 | 757 | |
9ac0d9e0 | 758 | BLOCK_INPUT; |
56d2031b JB |
759 | /* We must call malloc explicitly when BLOCK is 0, since some |
760 | reallocs don't do this. */ | |
761 | if (! block) | |
c971ff9a | 762 | val = (POINTER_TYPE *) malloc (size); |
f048679d | 763 | else |
c971ff9a | 764 | val = (POINTER_TYPE *) realloc (block, size); |
9ac0d9e0 | 765 | UNBLOCK_INPUT; |
7146af97 JB |
766 | |
767 | if (!val && size) memory_full (); | |
768 | return val; | |
769 | } | |
9ac0d9e0 | 770 | |
34400008 | 771 | |
d7489312 | 772 | /* Like free but block interrupt input. */ |
34400008 | 773 | |
9ac0d9e0 JB |
774 | void |
775 | xfree (block) | |
c971ff9a | 776 | POINTER_TYPE *block; |
9ac0d9e0 JB |
777 | { |
778 | BLOCK_INPUT; | |
779 | free (block); | |
780 | UNBLOCK_INPUT; | |
24d8a105 RS |
781 | /* We don't call refill_memory_reserve here |
782 | because that duplicates doing so in emacs_blocked_free | |
783 | and the criterion should go there. */ | |
9ac0d9e0 JB |
784 | } |
785 | ||
c8099634 | 786 | |
dca7c6a8 GM |
787 | /* Like strdup, but uses xmalloc. */ |
788 | ||
789 | char * | |
790 | xstrdup (s) | |
943b873e | 791 | const char *s; |
dca7c6a8 | 792 | { |
675d5130 | 793 | size_t len = strlen (s) + 1; |
dca7c6a8 GM |
794 | char *p = (char *) xmalloc (len); |
795 | bcopy (s, p, len); | |
796 | return p; | |
797 | } | |
798 | ||
799 | ||
f61bef8b KS |
800 | /* Unwind for SAFE_ALLOCA */ |
801 | ||
802 | Lisp_Object | |
803 | safe_alloca_unwind (arg) | |
804 | Lisp_Object arg; | |
805 | { | |
b766f870 KS |
806 | register struct Lisp_Save_Value *p = XSAVE_VALUE (arg); |
807 | ||
808 | p->dogc = 0; | |
809 | xfree (p->pointer); | |
810 | p->pointer = 0; | |
7b7990cc | 811 | free_misc (arg); |
f61bef8b KS |
812 | return Qnil; |
813 | } | |
814 | ||
815 | ||
34400008 GM |
816 | /* Like malloc but used for allocating Lisp data. NBYTES is the |
817 | number of bytes to allocate, TYPE describes the intended use of the | |
818 | allcated memory block (for strings, for conses, ...). */ | |
819 | ||
212f33f1 | 820 | #ifndef USE_LSB_TAG |
918a23a7 | 821 | static void *lisp_malloc_loser; |
212f33f1 | 822 | #endif |
918a23a7 | 823 | |
675d5130 | 824 | static POINTER_TYPE * |
34400008 | 825 | lisp_malloc (nbytes, type) |
675d5130 | 826 | size_t nbytes; |
34400008 | 827 | enum mem_type type; |
c8099634 | 828 | { |
34400008 | 829 | register void *val; |
c8099634 RS |
830 | |
831 | BLOCK_INPUT; | |
877935b1 GM |
832 | |
833 | #ifdef GC_MALLOC_CHECK | |
834 | allocated_mem_type = type; | |
835 | #endif | |
177c0ea7 | 836 | |
34400008 | 837 | val = (void *) malloc (nbytes); |
c8099634 | 838 | |
831b476c | 839 | #ifndef USE_LSB_TAG |
918a23a7 RS |
840 | /* If the memory just allocated cannot be addressed thru a Lisp |
841 | object's pointer, and it needs to be, | |
842 | that's equivalent to running out of memory. */ | |
843 | if (val && type != MEM_TYPE_NON_LISP) | |
844 | { | |
845 | Lisp_Object tem; | |
846 | XSETCONS (tem, (char *) val + nbytes - 1); | |
847 | if ((char *) XCONS (tem) != (char *) val + nbytes - 1) | |
848 | { | |
849 | lisp_malloc_loser = val; | |
850 | free (val); | |
851 | val = 0; | |
852 | } | |
853 | } | |
831b476c | 854 | #endif |
918a23a7 | 855 | |
877935b1 | 856 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
dca7c6a8 | 857 | if (val && type != MEM_TYPE_NON_LISP) |
34400008 GM |
858 | mem_insert (val, (char *) val + nbytes, type); |
859 | #endif | |
177c0ea7 | 860 | |
dca7c6a8 GM |
861 | UNBLOCK_INPUT; |
862 | if (!val && nbytes) | |
863 | memory_full (); | |
c8099634 RS |
864 | return val; |
865 | } | |
866 | ||
34400008 GM |
867 | /* Free BLOCK. This must be called to free memory allocated with a |
868 | call to lisp_malloc. */ | |
869 | ||
bf952fb6 | 870 | static void |
c8099634 | 871 | lisp_free (block) |
675d5130 | 872 | POINTER_TYPE *block; |
c8099634 RS |
873 | { |
874 | BLOCK_INPUT; | |
c8099634 | 875 | free (block); |
877935b1 | 876 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
34400008 GM |
877 | mem_delete (mem_find (block)); |
878 | #endif | |
c8099634 RS |
879 | UNBLOCK_INPUT; |
880 | } | |
34400008 | 881 | |
ab6780cd SM |
882 | /* Allocation of aligned blocks of memory to store Lisp data. */ |
883 | /* The entry point is lisp_align_malloc which returns blocks of at most */ | |
884 | /* BLOCK_BYTES and guarantees they are aligned on a BLOCK_ALIGN boundary. */ | |
885 | ||
349a4500 SM |
886 | /* Use posix_memalloc if the system has it and we're using the system's |
887 | malloc (because our gmalloc.c routines don't have posix_memalign although | |
888 | its memalloc could be used). */ | |
b4181b01 KS |
889 | #if defined (HAVE_POSIX_MEMALIGN) && defined (SYSTEM_MALLOC) |
890 | #define USE_POSIX_MEMALIGN 1 | |
891 | #endif | |
ab6780cd SM |
892 | |
893 | /* BLOCK_ALIGN has to be a power of 2. */ | |
894 | #define BLOCK_ALIGN (1 << 10) | |
ab6780cd SM |
895 | |
896 | /* Padding to leave at the end of a malloc'd block. This is to give | |
897 | malloc a chance to minimize the amount of memory wasted to alignment. | |
898 | It should be tuned to the particular malloc library used. | |
19bcad1f SM |
899 | On glibc-2.3.2, malloc never tries to align, so a padding of 0 is best. |
900 | posix_memalign on the other hand would ideally prefer a value of 4 | |
901 | because otherwise, there's 1020 bytes wasted between each ablocks. | |
f501ccb4 SM |
902 | In Emacs, testing shows that those 1020 can most of the time be |
903 | efficiently used by malloc to place other objects, so a value of 0 can | |
904 | still preferable unless you have a lot of aligned blocks and virtually | |
905 | nothing else. */ | |
19bcad1f SM |
906 | #define BLOCK_PADDING 0 |
907 | #define BLOCK_BYTES \ | |
f501ccb4 | 908 | (BLOCK_ALIGN - sizeof (struct ablock *) - BLOCK_PADDING) |
19bcad1f SM |
909 | |
910 | /* Internal data structures and constants. */ | |
911 | ||
ab6780cd SM |
912 | #define ABLOCKS_SIZE 16 |
913 | ||
914 | /* An aligned block of memory. */ | |
915 | struct ablock | |
916 | { | |
917 | union | |
918 | { | |
919 | char payload[BLOCK_BYTES]; | |
920 | struct ablock *next_free; | |
921 | } x; | |
922 | /* `abase' is the aligned base of the ablocks. */ | |
923 | /* It is overloaded to hold the virtual `busy' field that counts | |
924 | the number of used ablock in the parent ablocks. | |
925 | The first ablock has the `busy' field, the others have the `abase' | |
926 | field. To tell the difference, we assume that pointers will have | |
927 | integer values larger than 2 * ABLOCKS_SIZE. The lowest bit of `busy' | |
928 | is used to tell whether the real base of the parent ablocks is `abase' | |
929 | (if not, the word before the first ablock holds a pointer to the | |
930 | real base). */ | |
931 | struct ablocks *abase; | |
932 | /* The padding of all but the last ablock is unused. The padding of | |
933 | the last ablock in an ablocks is not allocated. */ | |
19bcad1f SM |
934 | #if BLOCK_PADDING |
935 | char padding[BLOCK_PADDING]; | |
ebb8d410 | 936 | #endif |
ab6780cd SM |
937 | }; |
938 | ||
939 | /* A bunch of consecutive aligned blocks. */ | |
940 | struct ablocks | |
941 | { | |
942 | struct ablock blocks[ABLOCKS_SIZE]; | |
943 | }; | |
944 | ||
945 | /* Size of the block requested from malloc or memalign. */ | |
19bcad1f | 946 | #define ABLOCKS_BYTES (sizeof (struct ablocks) - BLOCK_PADDING) |
ab6780cd SM |
947 | |
948 | #define ABLOCK_ABASE(block) \ | |
949 | (((unsigned long) (block)->abase) <= (1 + 2 * ABLOCKS_SIZE) \ | |
950 | ? (struct ablocks *)(block) \ | |
951 | : (block)->abase) | |
952 | ||
953 | /* Virtual `busy' field. */ | |
954 | #define ABLOCKS_BUSY(abase) ((abase)->blocks[0].abase) | |
955 | ||
956 | /* Pointer to the (not necessarily aligned) malloc block. */ | |
349a4500 | 957 | #ifdef USE_POSIX_MEMALIGN |
19bcad1f SM |
958 | #define ABLOCKS_BASE(abase) (abase) |
959 | #else | |
ab6780cd | 960 | #define ABLOCKS_BASE(abase) \ |
03bb6a06 | 961 | (1 & (long) ABLOCKS_BUSY (abase) ? abase : ((void**)abase)[-1]) |
19bcad1f | 962 | #endif |
ab6780cd SM |
963 | |
964 | /* The list of free ablock. */ | |
965 | static struct ablock *free_ablock; | |
966 | ||
967 | /* Allocate an aligned block of nbytes. | |
968 | Alignment is on a multiple of BLOCK_ALIGN and `nbytes' has to be | |
969 | smaller or equal to BLOCK_BYTES. */ | |
970 | static POINTER_TYPE * | |
971 | lisp_align_malloc (nbytes, type) | |
972 | size_t nbytes; | |
973 | enum mem_type type; | |
974 | { | |
975 | void *base, *val; | |
976 | struct ablocks *abase; | |
977 | ||
978 | eassert (nbytes <= BLOCK_BYTES); | |
979 | ||
980 | BLOCK_INPUT; | |
981 | ||
982 | #ifdef GC_MALLOC_CHECK | |
983 | allocated_mem_type = type; | |
984 | #endif | |
985 | ||
986 | if (!free_ablock) | |
987 | { | |
d7489312 DL |
988 | int i; |
989 | EMACS_INT aligned; /* int gets warning casting to 64-bit pointer. */ | |
ab6780cd SM |
990 | |
991 | #ifdef DOUG_LEA_MALLOC | |
992 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed | |
993 | because mapped region contents are not preserved in | |
994 | a dumped Emacs. */ | |
995 | mallopt (M_MMAP_MAX, 0); | |
996 | #endif | |
997 | ||
349a4500 | 998 | #ifdef USE_POSIX_MEMALIGN |
19bcad1f SM |
999 | { |
1000 | int err = posix_memalign (&base, BLOCK_ALIGN, ABLOCKS_BYTES); | |
ab349c19 RS |
1001 | if (err) |
1002 | base = NULL; | |
1003 | abase = base; | |
19bcad1f SM |
1004 | } |
1005 | #else | |
ab6780cd SM |
1006 | base = malloc (ABLOCKS_BYTES); |
1007 | abase = ALIGN (base, BLOCK_ALIGN); | |
ab349c19 RS |
1008 | #endif |
1009 | ||
4532fdde RS |
1010 | if (base == 0) |
1011 | { | |
1012 | UNBLOCK_INPUT; | |
1013 | memory_full (); | |
1014 | } | |
ab6780cd SM |
1015 | |
1016 | aligned = (base == abase); | |
1017 | if (!aligned) | |
1018 | ((void**)abase)[-1] = base; | |
1019 | ||
1020 | #ifdef DOUG_LEA_MALLOC | |
1021 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
1022 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
1023 | #endif | |
1024 | ||
831b476c | 1025 | #ifndef USE_LSB_TAG |
f4446bbf GM |
1026 | /* If the memory just allocated cannot be addressed thru a Lisp |
1027 | object's pointer, and it needs to be, that's equivalent to | |
1028 | running out of memory. */ | |
1029 | if (type != MEM_TYPE_NON_LISP) | |
1030 | { | |
1031 | Lisp_Object tem; | |
1032 | char *end = (char *) base + ABLOCKS_BYTES - 1; | |
1033 | XSETCONS (tem, end); | |
1034 | if ((char *) XCONS (tem) != end) | |
1035 | { | |
1036 | lisp_malloc_loser = base; | |
1037 | free (base); | |
1038 | UNBLOCK_INPUT; | |
1039 | memory_full (); | |
1040 | } | |
1041 | } | |
831b476c | 1042 | #endif |
f4446bbf | 1043 | |
ab6780cd SM |
1044 | /* Initialize the blocks and put them on the free list. |
1045 | Is `base' was not properly aligned, we can't use the last block. */ | |
1046 | for (i = 0; i < (aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1); i++) | |
1047 | { | |
1048 | abase->blocks[i].abase = abase; | |
1049 | abase->blocks[i].x.next_free = free_ablock; | |
1050 | free_ablock = &abase->blocks[i]; | |
1051 | } | |
03bb6a06 | 1052 | ABLOCKS_BUSY (abase) = (struct ablocks *) (long) aligned; |
ab6780cd | 1053 | |
19bcad1f | 1054 | eassert (0 == ((EMACS_UINT)abase) % BLOCK_ALIGN); |
ab6780cd SM |
1055 | eassert (ABLOCK_ABASE (&abase->blocks[3]) == abase); /* 3 is arbitrary */ |
1056 | eassert (ABLOCK_ABASE (&abase->blocks[0]) == abase); | |
1057 | eassert (ABLOCKS_BASE (abase) == base); | |
03bb6a06 | 1058 | eassert (aligned == (long) ABLOCKS_BUSY (abase)); |
ab6780cd SM |
1059 | } |
1060 | ||
1061 | abase = ABLOCK_ABASE (free_ablock); | |
03bb6a06 | 1062 | ABLOCKS_BUSY (abase) = (struct ablocks *) (2 + (long) ABLOCKS_BUSY (abase)); |
ab6780cd SM |
1063 | val = free_ablock; |
1064 | free_ablock = free_ablock->x.next_free; | |
1065 | ||
ab6780cd SM |
1066 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
1067 | if (val && type != MEM_TYPE_NON_LISP) | |
1068 | mem_insert (val, (char *) val + nbytes, type); | |
1069 | #endif | |
1070 | ||
1071 | UNBLOCK_INPUT; | |
1072 | if (!val && nbytes) | |
1073 | memory_full (); | |
1074 | ||
1075 | eassert (0 == ((EMACS_UINT)val) % BLOCK_ALIGN); | |
1076 | return val; | |
1077 | } | |
1078 | ||
1079 | static void | |
1080 | lisp_align_free (block) | |
1081 | POINTER_TYPE *block; | |
1082 | { | |
1083 | struct ablock *ablock = block; | |
1084 | struct ablocks *abase = ABLOCK_ABASE (ablock); | |
1085 | ||
1086 | BLOCK_INPUT; | |
1087 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK | |
1088 | mem_delete (mem_find (block)); | |
1089 | #endif | |
1090 | /* Put on free list. */ | |
1091 | ablock->x.next_free = free_ablock; | |
1092 | free_ablock = ablock; | |
1093 | /* Update busy count. */ | |
03bb6a06 | 1094 | ABLOCKS_BUSY (abase) = (struct ablocks *) (-2 + (long) ABLOCKS_BUSY (abase)); |
d2db1c32 | 1095 | |
03bb6a06 | 1096 | if (2 > (long) ABLOCKS_BUSY (abase)) |
ab6780cd | 1097 | { /* All the blocks are free. */ |
03bb6a06 | 1098 | int i = 0, aligned = (long) ABLOCKS_BUSY (abase); |
ab6780cd SM |
1099 | struct ablock **tem = &free_ablock; |
1100 | struct ablock *atop = &abase->blocks[aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1]; | |
1101 | ||
1102 | while (*tem) | |
1103 | { | |
1104 | if (*tem >= (struct ablock *) abase && *tem < atop) | |
1105 | { | |
1106 | i++; | |
1107 | *tem = (*tem)->x.next_free; | |
1108 | } | |
1109 | else | |
1110 | tem = &(*tem)->x.next_free; | |
1111 | } | |
1112 | eassert ((aligned & 1) == aligned); | |
1113 | eassert (i == (aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1)); | |
349a4500 | 1114 | #ifdef USE_POSIX_MEMALIGN |
cfb2f32e SM |
1115 | eassert ((unsigned long)ABLOCKS_BASE (abase) % BLOCK_ALIGN == 0); |
1116 | #endif | |
ab6780cd SM |
1117 | free (ABLOCKS_BASE (abase)); |
1118 | } | |
1119 | UNBLOCK_INPUT; | |
1120 | } | |
3ef06d12 SM |
1121 | |
1122 | /* Return a new buffer structure allocated from the heap with | |
1123 | a call to lisp_malloc. */ | |
1124 | ||
1125 | struct buffer * | |
1126 | allocate_buffer () | |
1127 | { | |
1128 | struct buffer *b | |
1129 | = (struct buffer *) lisp_malloc (sizeof (struct buffer), | |
1130 | MEM_TYPE_BUFFER); | |
1131 | return b; | |
1132 | } | |
1133 | ||
9ac0d9e0 | 1134 | \f |
026cdede SM |
1135 | #ifndef SYSTEM_MALLOC |
1136 | ||
9ac0d9e0 JB |
1137 | /* Arranging to disable input signals while we're in malloc. |
1138 | ||
1139 | This only works with GNU malloc. To help out systems which can't | |
1140 | use GNU malloc, all the calls to malloc, realloc, and free | |
1141 | elsewhere in the code should be inside a BLOCK_INPUT/UNBLOCK_INPUT | |
026cdede | 1142 | pair; unfortunately, we have no idea what C library functions |
9ac0d9e0 | 1143 | might call malloc, so we can't really protect them unless you're |
2c5bd608 DL |
1144 | using GNU malloc. Fortunately, most of the major operating systems |
1145 | can use GNU malloc. */ | |
9ac0d9e0 | 1146 | |
026cdede SM |
1147 | #ifndef SYNC_INPUT |
1148 | ||
b3303f74 | 1149 | #ifndef DOUG_LEA_MALLOC |
fa8459a3 DN |
1150 | extern void * (*__malloc_hook) P_ ((size_t, const void *)); |
1151 | extern void * (*__realloc_hook) P_ ((void *, size_t, const void *)); | |
1152 | extern void (*__free_hook) P_ ((void *, const void *)); | |
b3303f74 DL |
1153 | /* Else declared in malloc.h, perhaps with an extra arg. */ |
1154 | #endif /* DOUG_LEA_MALLOC */ | |
fa8459a3 DN |
1155 | static void * (*old_malloc_hook) P_ ((size_t, const void *)); |
1156 | static void * (*old_realloc_hook) P_ ((void *, size_t, const void*)); | |
1157 | static void (*old_free_hook) P_ ((void*, const void*)); | |
9ac0d9e0 | 1158 | |
276cbe5a RS |
1159 | /* This function is used as the hook for free to call. */ |
1160 | ||
9ac0d9e0 | 1161 | static void |
fa8459a3 | 1162 | emacs_blocked_free (ptr, ptr2) |
9ac0d9e0 | 1163 | void *ptr; |
fa8459a3 | 1164 | const void *ptr2; |
9ac0d9e0 | 1165 | { |
24d8a105 RS |
1166 | EMACS_INT bytes_used_now; |
1167 | ||
aa477689 | 1168 | BLOCK_INPUT_ALLOC; |
877935b1 GM |
1169 | |
1170 | #ifdef GC_MALLOC_CHECK | |
a83fee2c GM |
1171 | if (ptr) |
1172 | { | |
1173 | struct mem_node *m; | |
177c0ea7 | 1174 | |
a83fee2c GM |
1175 | m = mem_find (ptr); |
1176 | if (m == MEM_NIL || m->start != ptr) | |
1177 | { | |
1178 | fprintf (stderr, | |
1179 | "Freeing `%p' which wasn't allocated with malloc\n", ptr); | |
1180 | abort (); | |
1181 | } | |
1182 | else | |
1183 | { | |
1184 | /* fprintf (stderr, "free %p...%p (%p)\n", m->start, m->end, ptr); */ | |
1185 | mem_delete (m); | |
1186 | } | |
1187 | } | |
877935b1 | 1188 | #endif /* GC_MALLOC_CHECK */ |
177c0ea7 | 1189 | |
9ac0d9e0 JB |
1190 | __free_hook = old_free_hook; |
1191 | free (ptr); | |
177c0ea7 | 1192 | |
276cbe5a RS |
1193 | /* If we released our reserve (due to running out of memory), |
1194 | and we have a fair amount free once again, | |
1195 | try to set aside another reserve in case we run out once more. */ | |
24d8a105 | 1196 | if (! NILP (Vmemory_full) |
276cbe5a RS |
1197 | /* Verify there is enough space that even with the malloc |
1198 | hysteresis this call won't run out again. | |
1199 | The code here is correct as long as SPARE_MEMORY | |
1200 | is substantially larger than the block size malloc uses. */ | |
1201 | && (bytes_used_when_full | |
4d74a5fc | 1202 | > ((bytes_used_when_reconsidered = BYTES_USED) |
bccfb310 | 1203 | + max (malloc_hysteresis, 4) * SPARE_MEMORY))) |
24d8a105 | 1204 | refill_memory_reserve (); |
276cbe5a | 1205 | |
b0846f52 | 1206 | __free_hook = emacs_blocked_free; |
aa477689 | 1207 | UNBLOCK_INPUT_ALLOC; |
9ac0d9e0 JB |
1208 | } |
1209 | ||
34400008 | 1210 | |
276cbe5a RS |
1211 | /* This function is the malloc hook that Emacs uses. */ |
1212 | ||
9ac0d9e0 | 1213 | static void * |
fa8459a3 | 1214 | emacs_blocked_malloc (size, ptr) |
675d5130 | 1215 | size_t size; |
fa8459a3 | 1216 | const void *ptr; |
9ac0d9e0 JB |
1217 | { |
1218 | void *value; | |
1219 | ||
aa477689 | 1220 | BLOCK_INPUT_ALLOC; |
9ac0d9e0 | 1221 | __malloc_hook = old_malloc_hook; |
1177ecf6 | 1222 | #ifdef DOUG_LEA_MALLOC |
d1658221 | 1223 | mallopt (M_TOP_PAD, malloc_hysteresis * 4096); |
1177ecf6 | 1224 | #else |
d1658221 | 1225 | __malloc_extra_blocks = malloc_hysteresis; |
1177ecf6 | 1226 | #endif |
877935b1 | 1227 | |
2756d8ee | 1228 | value = (void *) malloc (size); |
877935b1 GM |
1229 | |
1230 | #ifdef GC_MALLOC_CHECK | |
1231 | { | |
1232 | struct mem_node *m = mem_find (value); | |
1233 | if (m != MEM_NIL) | |
1234 | { | |
1235 | fprintf (stderr, "Malloc returned %p which is already in use\n", | |
1236 | value); | |
1237 | fprintf (stderr, "Region in use is %p...%p, %u bytes, type %d\n", | |
1238 | m->start, m->end, (char *) m->end - (char *) m->start, | |
1239 | m->type); | |
1240 | abort (); | |
1241 | } | |
1242 | ||
1243 | if (!dont_register_blocks) | |
1244 | { | |
1245 | mem_insert (value, (char *) value + max (1, size), allocated_mem_type); | |
1246 | allocated_mem_type = MEM_TYPE_NON_LISP; | |
1247 | } | |
1248 | } | |
1249 | #endif /* GC_MALLOC_CHECK */ | |
177c0ea7 | 1250 | |
b0846f52 | 1251 | __malloc_hook = emacs_blocked_malloc; |
aa477689 | 1252 | UNBLOCK_INPUT_ALLOC; |
9ac0d9e0 | 1253 | |
877935b1 | 1254 | /* fprintf (stderr, "%p malloc\n", value); */ |
9ac0d9e0 JB |
1255 | return value; |
1256 | } | |
1257 | ||
34400008 GM |
1258 | |
1259 | /* This function is the realloc hook that Emacs uses. */ | |
1260 | ||
9ac0d9e0 | 1261 | static void * |
fa8459a3 | 1262 | emacs_blocked_realloc (ptr, size, ptr2) |
9ac0d9e0 | 1263 | void *ptr; |
675d5130 | 1264 | size_t size; |
fa8459a3 | 1265 | const void *ptr2; |
9ac0d9e0 JB |
1266 | { |
1267 | void *value; | |
1268 | ||
aa477689 | 1269 | BLOCK_INPUT_ALLOC; |
9ac0d9e0 | 1270 | __realloc_hook = old_realloc_hook; |
877935b1 GM |
1271 | |
1272 | #ifdef GC_MALLOC_CHECK | |
1273 | if (ptr) | |
1274 | { | |
1275 | struct mem_node *m = mem_find (ptr); | |
1276 | if (m == MEM_NIL || m->start != ptr) | |
1277 | { | |
1278 | fprintf (stderr, | |
1279 | "Realloc of %p which wasn't allocated with malloc\n", | |
1280 | ptr); | |
1281 | abort (); | |
1282 | } | |
1283 | ||
1284 | mem_delete (m); | |
1285 | } | |
177c0ea7 | 1286 | |
877935b1 | 1287 | /* fprintf (stderr, "%p -> realloc\n", ptr); */ |
177c0ea7 | 1288 | |
877935b1 GM |
1289 | /* Prevent malloc from registering blocks. */ |
1290 | dont_register_blocks = 1; | |
1291 | #endif /* GC_MALLOC_CHECK */ | |
1292 | ||
2756d8ee | 1293 | value = (void *) realloc (ptr, size); |
877935b1 GM |
1294 | |
1295 | #ifdef GC_MALLOC_CHECK | |
1296 | dont_register_blocks = 0; | |
1297 | ||
1298 | { | |
1299 | struct mem_node *m = mem_find (value); | |
1300 | if (m != MEM_NIL) | |
1301 | { | |
1302 | fprintf (stderr, "Realloc returns memory that is already in use\n"); | |
1303 | abort (); | |
1304 | } | |
1305 | ||
1306 | /* Can't handle zero size regions in the red-black tree. */ | |
1307 | mem_insert (value, (char *) value + max (size, 1), MEM_TYPE_NON_LISP); | |
1308 | } | |
177c0ea7 | 1309 | |
877935b1 GM |
1310 | /* fprintf (stderr, "%p <- realloc\n", value); */ |
1311 | #endif /* GC_MALLOC_CHECK */ | |
177c0ea7 | 1312 | |
b0846f52 | 1313 | __realloc_hook = emacs_blocked_realloc; |
aa477689 | 1314 | UNBLOCK_INPUT_ALLOC; |
9ac0d9e0 JB |
1315 | |
1316 | return value; | |
1317 | } | |
1318 | ||
34400008 | 1319 | |
aa477689 JD |
1320 | #ifdef HAVE_GTK_AND_PTHREAD |
1321 | /* Called from Fdump_emacs so that when the dumped Emacs starts, it has a | |
1322 | normal malloc. Some thread implementations need this as they call | |
1323 | malloc before main. The pthread_self call in BLOCK_INPUT_ALLOC then | |
1324 | calls malloc because it is the first call, and we have an endless loop. */ | |
1325 | ||
1326 | void | |
1327 | reset_malloc_hooks () | |
1328 | { | |
1329 | __free_hook = 0; | |
1330 | __malloc_hook = 0; | |
1331 | __realloc_hook = 0; | |
1332 | } | |
1333 | #endif /* HAVE_GTK_AND_PTHREAD */ | |
1334 | ||
1335 | ||
34400008 GM |
1336 | /* Called from main to set up malloc to use our hooks. */ |
1337 | ||
9ac0d9e0 JB |
1338 | void |
1339 | uninterrupt_malloc () | |
1340 | { | |
aa477689 JD |
1341 | #ifdef HAVE_GTK_AND_PTHREAD |
1342 | pthread_mutexattr_t attr; | |
1343 | ||
1344 | /* GLIBC has a faster way to do this, but lets keep it portable. | |
1345 | This is according to the Single UNIX Specification. */ | |
1346 | pthread_mutexattr_init (&attr); | |
1347 | pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE); | |
1348 | pthread_mutex_init (&alloc_mutex, &attr); | |
aa477689 JD |
1349 | #endif /* HAVE_GTK_AND_PTHREAD */ |
1350 | ||
c8099634 RS |
1351 | if (__free_hook != emacs_blocked_free) |
1352 | old_free_hook = __free_hook; | |
b0846f52 | 1353 | __free_hook = emacs_blocked_free; |
9ac0d9e0 | 1354 | |
c8099634 RS |
1355 | if (__malloc_hook != emacs_blocked_malloc) |
1356 | old_malloc_hook = __malloc_hook; | |
b0846f52 | 1357 | __malloc_hook = emacs_blocked_malloc; |
9ac0d9e0 | 1358 | |
c8099634 RS |
1359 | if (__realloc_hook != emacs_blocked_realloc) |
1360 | old_realloc_hook = __realloc_hook; | |
b0846f52 | 1361 | __realloc_hook = emacs_blocked_realloc; |
9ac0d9e0 | 1362 | } |
2e471eb5 | 1363 | |
026cdede | 1364 | #endif /* not SYNC_INPUT */ |
2e471eb5 GM |
1365 | #endif /* not SYSTEM_MALLOC */ |
1366 | ||
1367 | ||
7146af97 | 1368 | \f |
2e471eb5 GM |
1369 | /*********************************************************************** |
1370 | Interval Allocation | |
1371 | ***********************************************************************/ | |
1a4f1e2c | 1372 | |
34400008 GM |
1373 | /* Number of intervals allocated in an interval_block structure. |
1374 | The 1020 is 1024 minus malloc overhead. */ | |
1375 | ||
d5e35230 JA |
1376 | #define INTERVAL_BLOCK_SIZE \ |
1377 | ((1020 - sizeof (struct interval_block *)) / sizeof (struct interval)) | |
1378 | ||
34400008 GM |
1379 | /* Intervals are allocated in chunks in form of an interval_block |
1380 | structure. */ | |
1381 | ||
d5e35230 | 1382 | struct interval_block |
2e471eb5 | 1383 | { |
d05b383a | 1384 | /* Place `intervals' first, to preserve alignment. */ |
2e471eb5 | 1385 | struct interval intervals[INTERVAL_BLOCK_SIZE]; |
d05b383a | 1386 | struct interval_block *next; |
2e471eb5 | 1387 | }; |
d5e35230 | 1388 | |
34400008 GM |
1389 | /* Current interval block. Its `next' pointer points to older |
1390 | blocks. */ | |
1391 | ||
d5e35230 | 1392 | struct interval_block *interval_block; |
34400008 GM |
1393 | |
1394 | /* Index in interval_block above of the next unused interval | |
1395 | structure. */ | |
1396 | ||
d5e35230 | 1397 | static int interval_block_index; |
34400008 GM |
1398 | |
1399 | /* Number of free and live intervals. */ | |
1400 | ||
2e471eb5 | 1401 | static int total_free_intervals, total_intervals; |
d5e35230 | 1402 | |
34400008 GM |
1403 | /* List of free intervals. */ |
1404 | ||
d5e35230 JA |
1405 | INTERVAL interval_free_list; |
1406 | ||
c8099634 | 1407 | /* Total number of interval blocks now in use. */ |
2e471eb5 | 1408 | |
c8099634 RS |
1409 | int n_interval_blocks; |
1410 | ||
34400008 GM |
1411 | |
1412 | /* Initialize interval allocation. */ | |
1413 | ||
d5e35230 JA |
1414 | static void |
1415 | init_intervals () | |
1416 | { | |
0930c1a1 SM |
1417 | interval_block = NULL; |
1418 | interval_block_index = INTERVAL_BLOCK_SIZE; | |
d5e35230 | 1419 | interval_free_list = 0; |
0930c1a1 | 1420 | n_interval_blocks = 0; |
d5e35230 JA |
1421 | } |
1422 | ||
34400008 GM |
1423 | |
1424 | /* Return a new interval. */ | |
d5e35230 JA |
1425 | |
1426 | INTERVAL | |
1427 | make_interval () | |
1428 | { | |
1429 | INTERVAL val; | |
1430 | ||
e2984df0 CY |
1431 | /* eassert (!handling_signal); */ |
1432 | ||
1433 | #ifndef SYNC_INPUT | |
1434 | BLOCK_INPUT; | |
1435 | #endif | |
cfb2f32e | 1436 | |
d5e35230 JA |
1437 | if (interval_free_list) |
1438 | { | |
1439 | val = interval_free_list; | |
439d5cb4 | 1440 | interval_free_list = INTERVAL_PARENT (interval_free_list); |
d5e35230 JA |
1441 | } |
1442 | else | |
1443 | { | |
1444 | if (interval_block_index == INTERVAL_BLOCK_SIZE) | |
1445 | { | |
3c06d205 KH |
1446 | register struct interval_block *newi; |
1447 | ||
34400008 GM |
1448 | newi = (struct interval_block *) lisp_malloc (sizeof *newi, |
1449 | MEM_TYPE_NON_LISP); | |
d5e35230 | 1450 | |
d5e35230 JA |
1451 | newi->next = interval_block; |
1452 | interval_block = newi; | |
1453 | interval_block_index = 0; | |
c8099634 | 1454 | n_interval_blocks++; |
d5e35230 JA |
1455 | } |
1456 | val = &interval_block->intervals[interval_block_index++]; | |
1457 | } | |
e2984df0 CY |
1458 | |
1459 | #ifndef SYNC_INPUT | |
1460 | UNBLOCK_INPUT; | |
1461 | #endif | |
1462 | ||
d5e35230 | 1463 | consing_since_gc += sizeof (struct interval); |
310ea200 | 1464 | intervals_consed++; |
d5e35230 | 1465 | RESET_INTERVAL (val); |
2336fe58 | 1466 | val->gcmarkbit = 0; |
d5e35230 JA |
1467 | return val; |
1468 | } | |
1469 | ||
34400008 GM |
1470 | |
1471 | /* Mark Lisp objects in interval I. */ | |
d5e35230 JA |
1472 | |
1473 | static void | |
d393c068 | 1474 | mark_interval (i, dummy) |
d5e35230 | 1475 | register INTERVAL i; |
d393c068 | 1476 | Lisp_Object dummy; |
d5e35230 | 1477 | { |
2336fe58 SM |
1478 | eassert (!i->gcmarkbit); /* Intervals are never shared. */ |
1479 | i->gcmarkbit = 1; | |
49723c04 | 1480 | mark_object (i->plist); |
d5e35230 JA |
1481 | } |
1482 | ||
34400008 GM |
1483 | |
1484 | /* Mark the interval tree rooted in TREE. Don't call this directly; | |
1485 | use the macro MARK_INTERVAL_TREE instead. */ | |
1486 | ||
d5e35230 JA |
1487 | static void |
1488 | mark_interval_tree (tree) | |
1489 | register INTERVAL tree; | |
1490 | { | |
e8720644 JB |
1491 | /* No need to test if this tree has been marked already; this |
1492 | function is always called through the MARK_INTERVAL_TREE macro, | |
1493 | which takes care of that. */ | |
1494 | ||
1e934989 | 1495 | traverse_intervals_noorder (tree, mark_interval, Qnil); |
d5e35230 JA |
1496 | } |
1497 | ||
34400008 GM |
1498 | |
1499 | /* Mark the interval tree rooted in I. */ | |
1500 | ||
e8720644 JB |
1501 | #define MARK_INTERVAL_TREE(i) \ |
1502 | do { \ | |
2336fe58 | 1503 | if (!NULL_INTERVAL_P (i) && !i->gcmarkbit) \ |
e8720644 JB |
1504 | mark_interval_tree (i); \ |
1505 | } while (0) | |
d5e35230 | 1506 | |
34400008 | 1507 | |
2e471eb5 GM |
1508 | #define UNMARK_BALANCE_INTERVALS(i) \ |
1509 | do { \ | |
1510 | if (! NULL_INTERVAL_P (i)) \ | |
2336fe58 | 1511 | (i) = balance_intervals (i); \ |
2e471eb5 | 1512 | } while (0) |
d5e35230 | 1513 | |
cc2d8c6b KR |
1514 | \f |
1515 | /* Number support. If NO_UNION_TYPE isn't in effect, we | |
1516 | can't create number objects in macros. */ | |
1517 | #ifndef make_number | |
1518 | Lisp_Object | |
1519 | make_number (n) | |
217604da | 1520 | EMACS_INT n; |
cc2d8c6b KR |
1521 | { |
1522 | Lisp_Object obj; | |
1523 | obj.s.val = n; | |
1524 | obj.s.type = Lisp_Int; | |
1525 | return obj; | |
1526 | } | |
1527 | #endif | |
d5e35230 | 1528 | \f |
2e471eb5 GM |
1529 | /*********************************************************************** |
1530 | String Allocation | |
1531 | ***********************************************************************/ | |
1a4f1e2c | 1532 | |
2e471eb5 GM |
1533 | /* Lisp_Strings are allocated in string_block structures. When a new |
1534 | string_block is allocated, all the Lisp_Strings it contains are | |
e0fead5d | 1535 | added to a free-list string_free_list. When a new Lisp_String is |
2e471eb5 GM |
1536 | needed, it is taken from that list. During the sweep phase of GC, |
1537 | string_blocks that are entirely free are freed, except two which | |
1538 | we keep. | |
7146af97 | 1539 | |
2e471eb5 GM |
1540 | String data is allocated from sblock structures. Strings larger |
1541 | than LARGE_STRING_BYTES, get their own sblock, data for smaller | |
1542 | strings is sub-allocated out of sblocks of size SBLOCK_SIZE. | |
7146af97 | 1543 | |
2e471eb5 GM |
1544 | Sblocks consist internally of sdata structures, one for each |
1545 | Lisp_String. The sdata structure points to the Lisp_String it | |
1546 | belongs to. The Lisp_String points back to the `u.data' member of | |
1547 | its sdata structure. | |
7146af97 | 1548 | |
2e471eb5 GM |
1549 | When a Lisp_String is freed during GC, it is put back on |
1550 | string_free_list, and its `data' member and its sdata's `string' | |
1551 | pointer is set to null. The size of the string is recorded in the | |
1552 | `u.nbytes' member of the sdata. So, sdata structures that are no | |
1553 | longer used, can be easily recognized, and it's easy to compact the | |
1554 | sblocks of small strings which we do in compact_small_strings. */ | |
7146af97 | 1555 | |
2e471eb5 GM |
1556 | /* Size in bytes of an sblock structure used for small strings. This |
1557 | is 8192 minus malloc overhead. */ | |
7146af97 | 1558 | |
2e471eb5 | 1559 | #define SBLOCK_SIZE 8188 |
c8099634 | 1560 | |
2e471eb5 GM |
1561 | /* Strings larger than this are considered large strings. String data |
1562 | for large strings is allocated from individual sblocks. */ | |
7146af97 | 1563 | |
2e471eb5 GM |
1564 | #define LARGE_STRING_BYTES 1024 |
1565 | ||
1566 | /* Structure describing string memory sub-allocated from an sblock. | |
1567 | This is where the contents of Lisp strings are stored. */ | |
1568 | ||
1569 | struct sdata | |
7146af97 | 1570 | { |
2e471eb5 GM |
1571 | /* Back-pointer to the string this sdata belongs to. If null, this |
1572 | structure is free, and the NBYTES member of the union below | |
34400008 | 1573 | contains the string's byte size (the same value that STRING_BYTES |
2e471eb5 GM |
1574 | would return if STRING were non-null). If non-null, STRING_BYTES |
1575 | (STRING) is the size of the data, and DATA contains the string's | |
1576 | contents. */ | |
1577 | struct Lisp_String *string; | |
7146af97 | 1578 | |
31d929e5 | 1579 | #ifdef GC_CHECK_STRING_BYTES |
177c0ea7 | 1580 | |
31d929e5 GM |
1581 | EMACS_INT nbytes; |
1582 | unsigned char data[1]; | |
177c0ea7 | 1583 | |
31d929e5 GM |
1584 | #define SDATA_NBYTES(S) (S)->nbytes |
1585 | #define SDATA_DATA(S) (S)->data | |
177c0ea7 | 1586 | |
31d929e5 GM |
1587 | #else /* not GC_CHECK_STRING_BYTES */ |
1588 | ||
2e471eb5 GM |
1589 | union |
1590 | { | |
1591 | /* When STRING in non-null. */ | |
1592 | unsigned char data[1]; | |
1593 | ||
1594 | /* When STRING is null. */ | |
1595 | EMACS_INT nbytes; | |
1596 | } u; | |
177c0ea7 | 1597 | |
31d929e5 GM |
1598 | |
1599 | #define SDATA_NBYTES(S) (S)->u.nbytes | |
1600 | #define SDATA_DATA(S) (S)->u.data | |
1601 | ||
1602 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 GM |
1603 | }; |
1604 | ||
31d929e5 | 1605 | |
2e471eb5 GM |
1606 | /* Structure describing a block of memory which is sub-allocated to |
1607 | obtain string data memory for strings. Blocks for small strings | |
1608 | are of fixed size SBLOCK_SIZE. Blocks for large strings are made | |
1609 | as large as needed. */ | |
1610 | ||
1611 | struct sblock | |
7146af97 | 1612 | { |
2e471eb5 GM |
1613 | /* Next in list. */ |
1614 | struct sblock *next; | |
7146af97 | 1615 | |
2e471eb5 GM |
1616 | /* Pointer to the next free sdata block. This points past the end |
1617 | of the sblock if there isn't any space left in this block. */ | |
1618 | struct sdata *next_free; | |
1619 | ||
1620 | /* Start of data. */ | |
1621 | struct sdata first_data; | |
1622 | }; | |
1623 | ||
1624 | /* Number of Lisp strings in a string_block structure. The 1020 is | |
1625 | 1024 minus malloc overhead. */ | |
1626 | ||
19bcad1f | 1627 | #define STRING_BLOCK_SIZE \ |
2e471eb5 GM |
1628 | ((1020 - sizeof (struct string_block *)) / sizeof (struct Lisp_String)) |
1629 | ||
1630 | /* Structure describing a block from which Lisp_String structures | |
1631 | are allocated. */ | |
1632 | ||
1633 | struct string_block | |
7146af97 | 1634 | { |
d05b383a | 1635 | /* Place `strings' first, to preserve alignment. */ |
19bcad1f | 1636 | struct Lisp_String strings[STRING_BLOCK_SIZE]; |
d05b383a | 1637 | struct string_block *next; |
2e471eb5 | 1638 | }; |
7146af97 | 1639 | |
2e471eb5 GM |
1640 | /* Head and tail of the list of sblock structures holding Lisp string |
1641 | data. We always allocate from current_sblock. The NEXT pointers | |
1642 | in the sblock structures go from oldest_sblock to current_sblock. */ | |
3c06d205 | 1643 | |
2e471eb5 | 1644 | static struct sblock *oldest_sblock, *current_sblock; |
7146af97 | 1645 | |
2e471eb5 | 1646 | /* List of sblocks for large strings. */ |
7146af97 | 1647 | |
2e471eb5 | 1648 | static struct sblock *large_sblocks; |
7146af97 | 1649 | |
2e471eb5 | 1650 | /* List of string_block structures, and how many there are. */ |
7146af97 | 1651 | |
2e471eb5 GM |
1652 | static struct string_block *string_blocks; |
1653 | static int n_string_blocks; | |
7146af97 | 1654 | |
2e471eb5 | 1655 | /* Free-list of Lisp_Strings. */ |
7146af97 | 1656 | |
2e471eb5 | 1657 | static struct Lisp_String *string_free_list; |
7146af97 | 1658 | |
2e471eb5 | 1659 | /* Number of live and free Lisp_Strings. */ |
c8099634 | 1660 | |
2e471eb5 | 1661 | static int total_strings, total_free_strings; |
7146af97 | 1662 | |
2e471eb5 GM |
1663 | /* Number of bytes used by live strings. */ |
1664 | ||
1665 | static int total_string_size; | |
1666 | ||
1667 | /* Given a pointer to a Lisp_String S which is on the free-list | |
1668 | string_free_list, return a pointer to its successor in the | |
1669 | free-list. */ | |
1670 | ||
1671 | #define NEXT_FREE_LISP_STRING(S) (*(struct Lisp_String **) (S)) | |
1672 | ||
1673 | /* Return a pointer to the sdata structure belonging to Lisp string S. | |
1674 | S must be live, i.e. S->data must not be null. S->data is actually | |
1675 | a pointer to the `u.data' member of its sdata structure; the | |
1676 | structure starts at a constant offset in front of that. */ | |
177c0ea7 | 1677 | |
31d929e5 GM |
1678 | #ifdef GC_CHECK_STRING_BYTES |
1679 | ||
1680 | #define SDATA_OF_STRING(S) \ | |
1681 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *) \ | |
1682 | - sizeof (EMACS_INT))) | |
1683 | ||
1684 | #else /* not GC_CHECK_STRING_BYTES */ | |
1685 | ||
2e471eb5 GM |
1686 | #define SDATA_OF_STRING(S) \ |
1687 | ((struct sdata *) ((S)->data - sizeof (struct Lisp_String *))) | |
1688 | ||
31d929e5 GM |
1689 | #endif /* not GC_CHECK_STRING_BYTES */ |
1690 | ||
212f33f1 KS |
1691 | |
1692 | #ifdef GC_CHECK_STRING_OVERRUN | |
bdbed949 KS |
1693 | |
1694 | /* We check for overrun in string data blocks by appending a small | |
1695 | "cookie" after each allocated string data block, and check for the | |
8349069c | 1696 | presence of this cookie during GC. */ |
bdbed949 KS |
1697 | |
1698 | #define GC_STRING_OVERRUN_COOKIE_SIZE 4 | |
1699 | static char string_overrun_cookie[GC_STRING_OVERRUN_COOKIE_SIZE] = | |
1700 | { 0xde, 0xad, 0xbe, 0xef }; | |
1701 | ||
212f33f1 | 1702 | #else |
bdbed949 | 1703 | #define GC_STRING_OVERRUN_COOKIE_SIZE 0 |
212f33f1 KS |
1704 | #endif |
1705 | ||
2e471eb5 GM |
1706 | /* Value is the size of an sdata structure large enough to hold NBYTES |
1707 | bytes of string data. The value returned includes a terminating | |
1708 | NUL byte, the size of the sdata structure, and padding. */ | |
1709 | ||
31d929e5 GM |
1710 | #ifdef GC_CHECK_STRING_BYTES |
1711 | ||
2e471eb5 GM |
1712 | #define SDATA_SIZE(NBYTES) \ |
1713 | ((sizeof (struct Lisp_String *) \ | |
1714 | + (NBYTES) + 1 \ | |
31d929e5 | 1715 | + sizeof (EMACS_INT) \ |
2e471eb5 GM |
1716 | + sizeof (EMACS_INT) - 1) \ |
1717 | & ~(sizeof (EMACS_INT) - 1)) | |
1718 | ||
31d929e5 GM |
1719 | #else /* not GC_CHECK_STRING_BYTES */ |
1720 | ||
1721 | #define SDATA_SIZE(NBYTES) \ | |
1722 | ((sizeof (struct Lisp_String *) \ | |
1723 | + (NBYTES) + 1 \ | |
1724 | + sizeof (EMACS_INT) - 1) \ | |
1725 | & ~(sizeof (EMACS_INT) - 1)) | |
1726 | ||
1727 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 | 1728 | |
bdbed949 KS |
1729 | /* Extra bytes to allocate for each string. */ |
1730 | ||
1731 | #define GC_STRING_EXTRA (GC_STRING_OVERRUN_COOKIE_SIZE) | |
1732 | ||
2e471eb5 | 1733 | /* Initialize string allocation. Called from init_alloc_once. */ |
d457598b AS |
1734 | |
1735 | void | |
2e471eb5 | 1736 | init_strings () |
7146af97 | 1737 | { |
2e471eb5 GM |
1738 | total_strings = total_free_strings = total_string_size = 0; |
1739 | oldest_sblock = current_sblock = large_sblocks = NULL; | |
1740 | string_blocks = NULL; | |
1741 | n_string_blocks = 0; | |
1742 | string_free_list = NULL; | |
7146af97 JB |
1743 | } |
1744 | ||
2e471eb5 | 1745 | |
361b097f GM |
1746 | #ifdef GC_CHECK_STRING_BYTES |
1747 | ||
361b097f GM |
1748 | static int check_string_bytes_count; |
1749 | ||
676a7251 GM |
1750 | void check_string_bytes P_ ((int)); |
1751 | void check_sblock P_ ((struct sblock *)); | |
1752 | ||
1753 | #define CHECK_STRING_BYTES(S) STRING_BYTES (S) | |
1754 | ||
1755 | ||
1756 | /* Like GC_STRING_BYTES, but with debugging check. */ | |
1757 | ||
1758 | int | |
1759 | string_bytes (s) | |
1760 | struct Lisp_String *s; | |
1761 | { | |
7cdee936 | 1762 | int nbytes = (s->size_byte < 0 ? s->size & ~ARRAY_MARK_FLAG : s->size_byte); |
676a7251 GM |
1763 | if (!PURE_POINTER_P (s) |
1764 | && s->data | |
1765 | && nbytes != SDATA_NBYTES (SDATA_OF_STRING (s))) | |
1766 | abort (); | |
1767 | return nbytes; | |
1768 | } | |
177c0ea7 | 1769 | |
2c5bd608 | 1770 | /* Check validity of Lisp strings' string_bytes member in B. */ |
676a7251 | 1771 | |
361b097f | 1772 | void |
676a7251 GM |
1773 | check_sblock (b) |
1774 | struct sblock *b; | |
361b097f | 1775 | { |
676a7251 | 1776 | struct sdata *from, *end, *from_end; |
177c0ea7 | 1777 | |
676a7251 | 1778 | end = b->next_free; |
177c0ea7 | 1779 | |
676a7251 | 1780 | for (from = &b->first_data; from < end; from = from_end) |
361b097f | 1781 | { |
676a7251 GM |
1782 | /* Compute the next FROM here because copying below may |
1783 | overwrite data we need to compute it. */ | |
1784 | int nbytes; | |
177c0ea7 | 1785 | |
676a7251 GM |
1786 | /* Check that the string size recorded in the string is the |
1787 | same as the one recorded in the sdata structure. */ | |
1788 | if (from->string) | |
1789 | CHECK_STRING_BYTES (from->string); | |
177c0ea7 | 1790 | |
676a7251 GM |
1791 | if (from->string) |
1792 | nbytes = GC_STRING_BYTES (from->string); | |
1793 | else | |
1794 | nbytes = SDATA_NBYTES (from); | |
177c0ea7 | 1795 | |
676a7251 | 1796 | nbytes = SDATA_SIZE (nbytes); |
212f33f1 | 1797 | from_end = (struct sdata *) ((char *) from + nbytes + GC_STRING_EXTRA); |
676a7251 GM |
1798 | } |
1799 | } | |
361b097f | 1800 | |
676a7251 GM |
1801 | |
1802 | /* Check validity of Lisp strings' string_bytes member. ALL_P | |
1803 | non-zero means check all strings, otherwise check only most | |
1804 | recently allocated strings. Used for hunting a bug. */ | |
1805 | ||
1806 | void | |
1807 | check_string_bytes (all_p) | |
1808 | int all_p; | |
1809 | { | |
1810 | if (all_p) | |
1811 | { | |
1812 | struct sblock *b; | |
1813 | ||
1814 | for (b = large_sblocks; b; b = b->next) | |
1815 | { | |
1816 | struct Lisp_String *s = b->first_data.string; | |
1817 | if (s) | |
1818 | CHECK_STRING_BYTES (s); | |
361b097f | 1819 | } |
177c0ea7 | 1820 | |
676a7251 GM |
1821 | for (b = oldest_sblock; b; b = b->next) |
1822 | check_sblock (b); | |
361b097f | 1823 | } |
676a7251 GM |
1824 | else |
1825 | check_sblock (current_sblock); | |
361b097f GM |
1826 | } |
1827 | ||
1828 | #endif /* GC_CHECK_STRING_BYTES */ | |
1829 | ||
212f33f1 KS |
1830 | #ifdef GC_CHECK_STRING_FREE_LIST |
1831 | ||
bdbed949 KS |
1832 | /* Walk through the string free list looking for bogus next pointers. |
1833 | This may catch buffer overrun from a previous string. */ | |
1834 | ||
212f33f1 KS |
1835 | static void |
1836 | check_string_free_list () | |
1837 | { | |
1838 | struct Lisp_String *s; | |
1839 | ||
1840 | /* Pop a Lisp_String off the free-list. */ | |
1841 | s = string_free_list; | |
1842 | while (s != NULL) | |
1843 | { | |
1844 | if ((unsigned)s < 1024) | |
1845 | abort(); | |
1846 | s = NEXT_FREE_LISP_STRING (s); | |
1847 | } | |
1848 | } | |
1849 | #else | |
1850 | #define check_string_free_list() | |
1851 | #endif | |
361b097f | 1852 | |
2e471eb5 GM |
1853 | /* Return a new Lisp_String. */ |
1854 | ||
1855 | static struct Lisp_String * | |
1856 | allocate_string () | |
7146af97 | 1857 | { |
2e471eb5 | 1858 | struct Lisp_String *s; |
7146af97 | 1859 | |
e2984df0 CY |
1860 | /* eassert (!handling_signal); */ |
1861 | ||
1862 | #ifndef SYNC_INPUT | |
1863 | BLOCK_INPUT; | |
1864 | #endif | |
cfb2f32e | 1865 | |
2e471eb5 GM |
1866 | /* If the free-list is empty, allocate a new string_block, and |
1867 | add all the Lisp_Strings in it to the free-list. */ | |
1868 | if (string_free_list == NULL) | |
7146af97 | 1869 | { |
2e471eb5 GM |
1870 | struct string_block *b; |
1871 | int i; | |
1872 | ||
34400008 | 1873 | b = (struct string_block *) lisp_malloc (sizeof *b, MEM_TYPE_STRING); |
2e471eb5 GM |
1874 | bzero (b, sizeof *b); |
1875 | b->next = string_blocks; | |
1876 | string_blocks = b; | |
1877 | ++n_string_blocks; | |
1878 | ||
19bcad1f | 1879 | for (i = STRING_BLOCK_SIZE - 1; i >= 0; --i) |
7146af97 | 1880 | { |
2e471eb5 GM |
1881 | s = b->strings + i; |
1882 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1883 | string_free_list = s; | |
7146af97 | 1884 | } |
2e471eb5 | 1885 | |
19bcad1f | 1886 | total_free_strings += STRING_BLOCK_SIZE; |
7146af97 | 1887 | } |
c0f51373 | 1888 | |
bdbed949 | 1889 | check_string_free_list (); |
212f33f1 | 1890 | |
2e471eb5 GM |
1891 | /* Pop a Lisp_String off the free-list. */ |
1892 | s = string_free_list; | |
1893 | string_free_list = NEXT_FREE_LISP_STRING (s); | |
c0f51373 | 1894 | |
e2984df0 CY |
1895 | #ifndef SYNC_INPUT |
1896 | UNBLOCK_INPUT; | |
1897 | #endif | |
1898 | ||
2e471eb5 GM |
1899 | /* Probably not strictly necessary, but play it safe. */ |
1900 | bzero (s, sizeof *s); | |
c0f51373 | 1901 | |
2e471eb5 GM |
1902 | --total_free_strings; |
1903 | ++total_strings; | |
1904 | ++strings_consed; | |
1905 | consing_since_gc += sizeof *s; | |
c0f51373 | 1906 | |
361b097f | 1907 | #ifdef GC_CHECK_STRING_BYTES |
83a96b4d | 1908 | if (!noninteractive |
e0f712ba | 1909 | #ifdef MAC_OS8 |
83a96b4d AC |
1910 | && current_sblock |
1911 | #endif | |
1912 | ) | |
361b097f | 1913 | { |
676a7251 GM |
1914 | if (++check_string_bytes_count == 200) |
1915 | { | |
1916 | check_string_bytes_count = 0; | |
1917 | check_string_bytes (1); | |
1918 | } | |
1919 | else | |
1920 | check_string_bytes (0); | |
361b097f | 1921 | } |
676a7251 | 1922 | #endif /* GC_CHECK_STRING_BYTES */ |
361b097f | 1923 | |
2e471eb5 | 1924 | return s; |
c0f51373 | 1925 | } |
7146af97 | 1926 | |
7146af97 | 1927 | |
2e471eb5 GM |
1928 | /* Set up Lisp_String S for holding NCHARS characters, NBYTES bytes, |
1929 | plus a NUL byte at the end. Allocate an sdata structure for S, and | |
1930 | set S->data to its `u.data' member. Store a NUL byte at the end of | |
1931 | S->data. Set S->size to NCHARS and S->size_byte to NBYTES. Free | |
1932 | S->data if it was initially non-null. */ | |
7146af97 | 1933 | |
2e471eb5 GM |
1934 | void |
1935 | allocate_string_data (s, nchars, nbytes) | |
1936 | struct Lisp_String *s; | |
1937 | int nchars, nbytes; | |
7146af97 | 1938 | { |
5c5fecb3 | 1939 | struct sdata *data, *old_data; |
2e471eb5 | 1940 | struct sblock *b; |
5c5fecb3 | 1941 | int needed, old_nbytes; |
7146af97 | 1942 | |
2e471eb5 GM |
1943 | /* Determine the number of bytes needed to store NBYTES bytes |
1944 | of string data. */ | |
1945 | needed = SDATA_SIZE (nbytes); | |
e2984df0 CY |
1946 | old_data = s->data ? SDATA_OF_STRING (s) : NULL; |
1947 | old_nbytes = GC_STRING_BYTES (s); | |
1948 | ||
1949 | #ifndef SYNC_INPUT | |
1950 | BLOCK_INPUT; | |
1951 | #endif | |
7146af97 | 1952 | |
2e471eb5 GM |
1953 | if (nbytes > LARGE_STRING_BYTES) |
1954 | { | |
675d5130 | 1955 | size_t size = sizeof *b - sizeof (struct sdata) + needed; |
2e471eb5 GM |
1956 | |
1957 | #ifdef DOUG_LEA_MALLOC | |
f8608968 GM |
1958 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
1959 | because mapped region contents are not preserved in | |
d36b182f DL |
1960 | a dumped Emacs. |
1961 | ||
1962 | In case you think of allowing it in a dumped Emacs at the | |
1963 | cost of not being able to re-dump, there's another reason: | |
1964 | mmap'ed data typically have an address towards the top of the | |
1965 | address space, which won't fit into an EMACS_INT (at least on | |
1966 | 32-bit systems with the current tagging scheme). --fx */ | |
1673df2e | 1967 | BLOCK_INPUT; |
2e471eb5 | 1968 | mallopt (M_MMAP_MAX, 0); |
1673df2e | 1969 | UNBLOCK_INPUT; |
2e471eb5 GM |
1970 | #endif |
1971 | ||
212f33f1 | 1972 | b = (struct sblock *) lisp_malloc (size + GC_STRING_EXTRA, MEM_TYPE_NON_LISP); |
177c0ea7 | 1973 | |
2e471eb5 GM |
1974 | #ifdef DOUG_LEA_MALLOC |
1975 | /* Back to a reasonable maximum of mmap'ed areas. */ | |
1673df2e | 1976 | BLOCK_INPUT; |
2e471eb5 | 1977 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); |
1673df2e | 1978 | UNBLOCK_INPUT; |
2e471eb5 | 1979 | #endif |
177c0ea7 | 1980 | |
2e471eb5 GM |
1981 | b->next_free = &b->first_data; |
1982 | b->first_data.string = NULL; | |
1983 | b->next = large_sblocks; | |
1984 | large_sblocks = b; | |
1985 | } | |
1986 | else if (current_sblock == NULL | |
1987 | || (((char *) current_sblock + SBLOCK_SIZE | |
1988 | - (char *) current_sblock->next_free) | |
212f33f1 | 1989 | < (needed + GC_STRING_EXTRA))) |
2e471eb5 GM |
1990 | { |
1991 | /* Not enough room in the current sblock. */ | |
34400008 | 1992 | b = (struct sblock *) lisp_malloc (SBLOCK_SIZE, MEM_TYPE_NON_LISP); |
2e471eb5 GM |
1993 | b->next_free = &b->first_data; |
1994 | b->first_data.string = NULL; | |
1995 | b->next = NULL; | |
1996 | ||
1997 | if (current_sblock) | |
1998 | current_sblock->next = b; | |
1999 | else | |
2000 | oldest_sblock = b; | |
2001 | current_sblock = b; | |
2002 | } | |
2003 | else | |
2004 | b = current_sblock; | |
5c5fecb3 | 2005 | |
2e471eb5 | 2006 | data = b->next_free; |
a0b08700 CY |
2007 | b->next_free = (struct sdata *) ((char *) data + needed + GC_STRING_EXTRA); |
2008 | ||
e2984df0 CY |
2009 | #ifndef SYNC_INPUT |
2010 | UNBLOCK_INPUT; | |
2011 | #endif | |
2012 | ||
2e471eb5 | 2013 | data->string = s; |
31d929e5 GM |
2014 | s->data = SDATA_DATA (data); |
2015 | #ifdef GC_CHECK_STRING_BYTES | |
2016 | SDATA_NBYTES (data) = nbytes; | |
2017 | #endif | |
2e471eb5 GM |
2018 | s->size = nchars; |
2019 | s->size_byte = nbytes; | |
2020 | s->data[nbytes] = '\0'; | |
212f33f1 | 2021 | #ifdef GC_CHECK_STRING_OVERRUN |
bdbed949 KS |
2022 | bcopy (string_overrun_cookie, (char *) data + needed, |
2023 | GC_STRING_OVERRUN_COOKIE_SIZE); | |
212f33f1 | 2024 | #endif |
177c0ea7 | 2025 | |
5c5fecb3 GM |
2026 | /* If S had already data assigned, mark that as free by setting its |
2027 | string back-pointer to null, and recording the size of the data | |
00c9c33c | 2028 | in it. */ |
5c5fecb3 GM |
2029 | if (old_data) |
2030 | { | |
31d929e5 | 2031 | SDATA_NBYTES (old_data) = old_nbytes; |
5c5fecb3 GM |
2032 | old_data->string = NULL; |
2033 | } | |
2034 | ||
2e471eb5 GM |
2035 | consing_since_gc += needed; |
2036 | } | |
2037 | ||
2038 | ||
2039 | /* Sweep and compact strings. */ | |
2040 | ||
2041 | static void | |
2042 | sweep_strings () | |
2043 | { | |
2044 | struct string_block *b, *next; | |
2045 | struct string_block *live_blocks = NULL; | |
177c0ea7 | 2046 | |
2e471eb5 GM |
2047 | string_free_list = NULL; |
2048 | total_strings = total_free_strings = 0; | |
2049 | total_string_size = 0; | |
2050 | ||
2051 | /* Scan strings_blocks, free Lisp_Strings that aren't marked. */ | |
2052 | for (b = string_blocks; b; b = next) | |
2053 | { | |
2054 | int i, nfree = 0; | |
2055 | struct Lisp_String *free_list_before = string_free_list; | |
2056 | ||
2057 | next = b->next; | |
2058 | ||
19bcad1f | 2059 | for (i = 0; i < STRING_BLOCK_SIZE; ++i) |
2e471eb5 GM |
2060 | { |
2061 | struct Lisp_String *s = b->strings + i; | |
2062 | ||
2063 | if (s->data) | |
2064 | { | |
2065 | /* String was not on free-list before. */ | |
2066 | if (STRING_MARKED_P (s)) | |
2067 | { | |
2068 | /* String is live; unmark it and its intervals. */ | |
2069 | UNMARK_STRING (s); | |
177c0ea7 | 2070 | |
2e471eb5 GM |
2071 | if (!NULL_INTERVAL_P (s->intervals)) |
2072 | UNMARK_BALANCE_INTERVALS (s->intervals); | |
2073 | ||
2074 | ++total_strings; | |
2075 | total_string_size += STRING_BYTES (s); | |
2076 | } | |
2077 | else | |
2078 | { | |
2079 | /* String is dead. Put it on the free-list. */ | |
2080 | struct sdata *data = SDATA_OF_STRING (s); | |
2081 | ||
2082 | /* Save the size of S in its sdata so that we know | |
2083 | how large that is. Reset the sdata's string | |
2084 | back-pointer so that we know it's free. */ | |
31d929e5 GM |
2085 | #ifdef GC_CHECK_STRING_BYTES |
2086 | if (GC_STRING_BYTES (s) != SDATA_NBYTES (data)) | |
2087 | abort (); | |
2088 | #else | |
2e471eb5 | 2089 | data->u.nbytes = GC_STRING_BYTES (s); |
31d929e5 | 2090 | #endif |
2e471eb5 GM |
2091 | data->string = NULL; |
2092 | ||
2093 | /* Reset the strings's `data' member so that we | |
2094 | know it's free. */ | |
2095 | s->data = NULL; | |
2096 | ||
2097 | /* Put the string on the free-list. */ | |
2098 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
2099 | string_free_list = s; | |
2100 | ++nfree; | |
2101 | } | |
2102 | } | |
2103 | else | |
2104 | { | |
2105 | /* S was on the free-list before. Put it there again. */ | |
2106 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
2107 | string_free_list = s; | |
2108 | ++nfree; | |
2109 | } | |
2110 | } | |
2111 | ||
34400008 | 2112 | /* Free blocks that contain free Lisp_Strings only, except |
2e471eb5 | 2113 | the first two of them. */ |
19bcad1f SM |
2114 | if (nfree == STRING_BLOCK_SIZE |
2115 | && total_free_strings > STRING_BLOCK_SIZE) | |
2e471eb5 GM |
2116 | { |
2117 | lisp_free (b); | |
2118 | --n_string_blocks; | |
2119 | string_free_list = free_list_before; | |
2120 | } | |
2121 | else | |
2122 | { | |
2123 | total_free_strings += nfree; | |
2124 | b->next = live_blocks; | |
2125 | live_blocks = b; | |
2126 | } | |
2127 | } | |
2128 | ||
bdbed949 | 2129 | check_string_free_list (); |
212f33f1 | 2130 | |
2e471eb5 GM |
2131 | string_blocks = live_blocks; |
2132 | free_large_strings (); | |
2133 | compact_small_strings (); | |
212f33f1 | 2134 | |
bdbed949 | 2135 | check_string_free_list (); |
2e471eb5 GM |
2136 | } |
2137 | ||
2138 | ||
2139 | /* Free dead large strings. */ | |
2140 | ||
2141 | static void | |
2142 | free_large_strings () | |
2143 | { | |
2144 | struct sblock *b, *next; | |
2145 | struct sblock *live_blocks = NULL; | |
177c0ea7 | 2146 | |
2e471eb5 GM |
2147 | for (b = large_sblocks; b; b = next) |
2148 | { | |
2149 | next = b->next; | |
2150 | ||
2151 | if (b->first_data.string == NULL) | |
2152 | lisp_free (b); | |
2153 | else | |
2154 | { | |
2155 | b->next = live_blocks; | |
2156 | live_blocks = b; | |
2157 | } | |
2158 | } | |
2159 | ||
2160 | large_sblocks = live_blocks; | |
2161 | } | |
2162 | ||
2163 | ||
2164 | /* Compact data of small strings. Free sblocks that don't contain | |
2165 | data of live strings after compaction. */ | |
2166 | ||
2167 | static void | |
2168 | compact_small_strings () | |
2169 | { | |
2170 | struct sblock *b, *tb, *next; | |
2171 | struct sdata *from, *to, *end, *tb_end; | |
2172 | struct sdata *to_end, *from_end; | |
2173 | ||
2174 | /* TB is the sblock we copy to, TO is the sdata within TB we copy | |
2175 | to, and TB_END is the end of TB. */ | |
2176 | tb = oldest_sblock; | |
2177 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
2178 | to = &tb->first_data; | |
2179 | ||
2180 | /* Step through the blocks from the oldest to the youngest. We | |
2181 | expect that old blocks will stabilize over time, so that less | |
2182 | copying will happen this way. */ | |
2183 | for (b = oldest_sblock; b; b = b->next) | |
2184 | { | |
2185 | end = b->next_free; | |
2186 | xassert ((char *) end <= (char *) b + SBLOCK_SIZE); | |
177c0ea7 | 2187 | |
2e471eb5 GM |
2188 | for (from = &b->first_data; from < end; from = from_end) |
2189 | { | |
2190 | /* Compute the next FROM here because copying below may | |
2191 | overwrite data we need to compute it. */ | |
2192 | int nbytes; | |
2193 | ||
31d929e5 GM |
2194 | #ifdef GC_CHECK_STRING_BYTES |
2195 | /* Check that the string size recorded in the string is the | |
2196 | same as the one recorded in the sdata structure. */ | |
2197 | if (from->string | |
2198 | && GC_STRING_BYTES (from->string) != SDATA_NBYTES (from)) | |
2199 | abort (); | |
2200 | #endif /* GC_CHECK_STRING_BYTES */ | |
177c0ea7 | 2201 | |
2e471eb5 GM |
2202 | if (from->string) |
2203 | nbytes = GC_STRING_BYTES (from->string); | |
2204 | else | |
31d929e5 | 2205 | nbytes = SDATA_NBYTES (from); |
177c0ea7 | 2206 | |
212f33f1 KS |
2207 | if (nbytes > LARGE_STRING_BYTES) |
2208 | abort (); | |
212f33f1 | 2209 | |
2e471eb5 | 2210 | nbytes = SDATA_SIZE (nbytes); |
212f33f1 KS |
2211 | from_end = (struct sdata *) ((char *) from + nbytes + GC_STRING_EXTRA); |
2212 | ||
2213 | #ifdef GC_CHECK_STRING_OVERRUN | |
bdbed949 KS |
2214 | if (bcmp (string_overrun_cookie, |
2215 | ((char *) from_end) - GC_STRING_OVERRUN_COOKIE_SIZE, | |
2216 | GC_STRING_OVERRUN_COOKIE_SIZE)) | |
212f33f1 KS |
2217 | abort (); |
2218 | #endif | |
177c0ea7 | 2219 | |
2e471eb5 GM |
2220 | /* FROM->string non-null means it's alive. Copy its data. */ |
2221 | if (from->string) | |
2222 | { | |
2223 | /* If TB is full, proceed with the next sblock. */ | |
212f33f1 | 2224 | to_end = (struct sdata *) ((char *) to + nbytes + GC_STRING_EXTRA); |
2e471eb5 GM |
2225 | if (to_end > tb_end) |
2226 | { | |
2227 | tb->next_free = to; | |
2228 | tb = tb->next; | |
2229 | tb_end = (struct sdata *) ((char *) tb + SBLOCK_SIZE); | |
2230 | to = &tb->first_data; | |
212f33f1 | 2231 | to_end = (struct sdata *) ((char *) to + nbytes + GC_STRING_EXTRA); |
2e471eb5 | 2232 | } |
177c0ea7 | 2233 | |
2e471eb5 GM |
2234 | /* Copy, and update the string's `data' pointer. */ |
2235 | if (from != to) | |
2236 | { | |
a2407477 | 2237 | xassert (tb != b || to <= from); |
212f33f1 | 2238 | safe_bcopy ((char *) from, (char *) to, nbytes + GC_STRING_EXTRA); |
31d929e5 | 2239 | to->string->data = SDATA_DATA (to); |
2e471eb5 GM |
2240 | } |
2241 | ||
2242 | /* Advance past the sdata we copied to. */ | |
2243 | to = to_end; | |
2244 | } | |
2245 | } | |
2246 | } | |
2247 | ||
2248 | /* The rest of the sblocks following TB don't contain live data, so | |
2249 | we can free them. */ | |
2250 | for (b = tb->next; b; b = next) | |
2251 | { | |
2252 | next = b->next; | |
2253 | lisp_free (b); | |
2254 | } | |
2255 | ||
2256 | tb->next_free = to; | |
2257 | tb->next = NULL; | |
2258 | current_sblock = tb; | |
2259 | } | |
2260 | ||
2261 | ||
2262 | DEFUN ("make-string", Fmake_string, Smake_string, 2, 2, 0, | |
69623621 RS |
2263 | doc: /* Return a newly created string of length LENGTH, with INIT in each element. |
2264 | LENGTH must be an integer. | |
2265 | INIT must be an integer that represents a character. */) | |
7ee72033 | 2266 | (length, init) |
2e471eb5 GM |
2267 | Lisp_Object length, init; |
2268 | { | |
2269 | register Lisp_Object val; | |
2270 | register unsigned char *p, *end; | |
2271 | int c, nbytes; | |
2272 | ||
b7826503 PJ |
2273 | CHECK_NATNUM (length); |
2274 | CHECK_NUMBER (init); | |
2e471eb5 GM |
2275 | |
2276 | c = XINT (init); | |
2277 | if (SINGLE_BYTE_CHAR_P (c)) | |
2278 | { | |
2279 | nbytes = XINT (length); | |
2280 | val = make_uninit_string (nbytes); | |
d5db4077 KR |
2281 | p = SDATA (val); |
2282 | end = p + SCHARS (val); | |
2e471eb5 GM |
2283 | while (p != end) |
2284 | *p++ = c; | |
2285 | } | |
2286 | else | |
2287 | { | |
d942b71c | 2288 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2e471eb5 GM |
2289 | int len = CHAR_STRING (c, str); |
2290 | ||
2291 | nbytes = len * XINT (length); | |
2292 | val = make_uninit_multibyte_string (XINT (length), nbytes); | |
d5db4077 | 2293 | p = SDATA (val); |
2e471eb5 GM |
2294 | end = p + nbytes; |
2295 | while (p != end) | |
2296 | { | |
2297 | bcopy (str, p, len); | |
2298 | p += len; | |
2299 | } | |
2300 | } | |
177c0ea7 | 2301 | |
2e471eb5 GM |
2302 | *p = 0; |
2303 | return val; | |
2304 | } | |
2305 | ||
2306 | ||
2307 | DEFUN ("make-bool-vector", Fmake_bool_vector, Smake_bool_vector, 2, 2, 0, | |
909e3b33 | 2308 | doc: /* Return a new bool-vector of length LENGTH, using INIT for each element. |
7ee72033 MB |
2309 | LENGTH must be a number. INIT matters only in whether it is t or nil. */) |
2310 | (length, init) | |
2e471eb5 GM |
2311 | Lisp_Object length, init; |
2312 | { | |
2313 | register Lisp_Object val; | |
2314 | struct Lisp_Bool_Vector *p; | |
2315 | int real_init, i; | |
2316 | int length_in_chars, length_in_elts, bits_per_value; | |
2317 | ||
b7826503 | 2318 | CHECK_NATNUM (length); |
2e471eb5 | 2319 | |
a097329f | 2320 | bits_per_value = sizeof (EMACS_INT) * BOOL_VECTOR_BITS_PER_CHAR; |
2e471eb5 GM |
2321 | |
2322 | length_in_elts = (XFASTINT (length) + bits_per_value - 1) / bits_per_value; | |
a097329f AS |
2323 | length_in_chars = ((XFASTINT (length) + BOOL_VECTOR_BITS_PER_CHAR - 1) |
2324 | / BOOL_VECTOR_BITS_PER_CHAR); | |
2e471eb5 GM |
2325 | |
2326 | /* We must allocate one more elements than LENGTH_IN_ELTS for the | |
2327 | slot `size' of the struct Lisp_Bool_Vector. */ | |
2328 | val = Fmake_vector (make_number (length_in_elts + 1), Qnil); | |
2329 | p = XBOOL_VECTOR (val); | |
177c0ea7 | 2330 | |
2e471eb5 GM |
2331 | /* Get rid of any bits that would cause confusion. */ |
2332 | p->vector_size = 0; | |
2333 | XSETBOOL_VECTOR (val, p); | |
2334 | p->size = XFASTINT (length); | |
177c0ea7 | 2335 | |
2e471eb5 GM |
2336 | real_init = (NILP (init) ? 0 : -1); |
2337 | for (i = 0; i < length_in_chars ; i++) | |
2338 | p->data[i] = real_init; | |
177c0ea7 | 2339 | |
2e471eb5 | 2340 | /* Clear the extraneous bits in the last byte. */ |
a097329f | 2341 | if (XINT (length) != length_in_chars * BOOL_VECTOR_BITS_PER_CHAR) |
2e471eb5 | 2342 | XBOOL_VECTOR (val)->data[length_in_chars - 1] |
a097329f | 2343 | &= (1 << (XINT (length) % BOOL_VECTOR_BITS_PER_CHAR)) - 1; |
2e471eb5 GM |
2344 | |
2345 | return val; | |
2346 | } | |
2347 | ||
2348 | ||
2349 | /* Make a string from NBYTES bytes at CONTENTS, and compute the number | |
2350 | of characters from the contents. This string may be unibyte or | |
2351 | multibyte, depending on the contents. */ | |
2352 | ||
2353 | Lisp_Object | |
2354 | make_string (contents, nbytes) | |
943b873e | 2355 | const char *contents; |
2e471eb5 GM |
2356 | int nbytes; |
2357 | { | |
2358 | register Lisp_Object val; | |
9eac9d59 KH |
2359 | int nchars, multibyte_nbytes; |
2360 | ||
2361 | parse_str_as_multibyte (contents, nbytes, &nchars, &multibyte_nbytes); | |
9eac9d59 KH |
2362 | if (nbytes == nchars || nbytes != multibyte_nbytes) |
2363 | /* CONTENTS contains no multibyte sequences or contains an invalid | |
2364 | multibyte sequence. We must make unibyte string. */ | |
495a6df3 KH |
2365 | val = make_unibyte_string (contents, nbytes); |
2366 | else | |
2367 | val = make_multibyte_string (contents, nchars, nbytes); | |
2e471eb5 GM |
2368 | return val; |
2369 | } | |
2370 | ||
2371 | ||
2372 | /* Make an unibyte string from LENGTH bytes at CONTENTS. */ | |
2373 | ||
2374 | Lisp_Object | |
2375 | make_unibyte_string (contents, length) | |
943b873e | 2376 | const char *contents; |
2e471eb5 GM |
2377 | int length; |
2378 | { | |
2379 | register Lisp_Object val; | |
2380 | val = make_uninit_string (length); | |
d5db4077 KR |
2381 | bcopy (contents, SDATA (val), length); |
2382 | STRING_SET_UNIBYTE (val); | |
2e471eb5 GM |
2383 | return val; |
2384 | } | |
2385 | ||
2386 | ||
2387 | /* Make a multibyte string from NCHARS characters occupying NBYTES | |
2388 | bytes at CONTENTS. */ | |
2389 | ||
2390 | Lisp_Object | |
2391 | make_multibyte_string (contents, nchars, nbytes) | |
943b873e | 2392 | const char *contents; |
2e471eb5 GM |
2393 | int nchars, nbytes; |
2394 | { | |
2395 | register Lisp_Object val; | |
2396 | val = make_uninit_multibyte_string (nchars, nbytes); | |
d5db4077 | 2397 | bcopy (contents, SDATA (val), nbytes); |
2e471eb5 GM |
2398 | return val; |
2399 | } | |
2400 | ||
2401 | ||
2402 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
2403 | CONTENTS. It is a multibyte string if NBYTES != NCHARS. */ | |
2404 | ||
2405 | Lisp_Object | |
2406 | make_string_from_bytes (contents, nchars, nbytes) | |
fcbb914b | 2407 | const char *contents; |
2e471eb5 GM |
2408 | int nchars, nbytes; |
2409 | { | |
2410 | register Lisp_Object val; | |
2411 | val = make_uninit_multibyte_string (nchars, nbytes); | |
d5db4077 KR |
2412 | bcopy (contents, SDATA (val), nbytes); |
2413 | if (SBYTES (val) == SCHARS (val)) | |
2414 | STRING_SET_UNIBYTE (val); | |
2e471eb5 GM |
2415 | return val; |
2416 | } | |
2417 | ||
2418 | ||
2419 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
2420 | CONTENTS. The argument MULTIBYTE controls whether to label the | |
229b28c4 KH |
2421 | string as multibyte. If NCHARS is negative, it counts the number of |
2422 | characters by itself. */ | |
2e471eb5 GM |
2423 | |
2424 | Lisp_Object | |
2425 | make_specified_string (contents, nchars, nbytes, multibyte) | |
fcbb914b | 2426 | const char *contents; |
2e471eb5 GM |
2427 | int nchars, nbytes; |
2428 | int multibyte; | |
2429 | { | |
2430 | register Lisp_Object val; | |
229b28c4 KH |
2431 | |
2432 | if (nchars < 0) | |
2433 | { | |
2434 | if (multibyte) | |
2435 | nchars = multibyte_chars_in_text (contents, nbytes); | |
2436 | else | |
2437 | nchars = nbytes; | |
2438 | } | |
2e471eb5 | 2439 | val = make_uninit_multibyte_string (nchars, nbytes); |
d5db4077 | 2440 | bcopy (contents, SDATA (val), nbytes); |
2e471eb5 | 2441 | if (!multibyte) |
d5db4077 | 2442 | STRING_SET_UNIBYTE (val); |
2e471eb5 GM |
2443 | return val; |
2444 | } | |
2445 | ||
2446 | ||
2447 | /* Make a string from the data at STR, treating it as multibyte if the | |
2448 | data warrants. */ | |
2449 | ||
2450 | Lisp_Object | |
2451 | build_string (str) | |
943b873e | 2452 | const char *str; |
2e471eb5 GM |
2453 | { |
2454 | return make_string (str, strlen (str)); | |
2455 | } | |
2456 | ||
2457 | ||
2458 | /* Return an unibyte Lisp_String set up to hold LENGTH characters | |
2459 | occupying LENGTH bytes. */ | |
2460 | ||
2461 | Lisp_Object | |
2462 | make_uninit_string (length) | |
2463 | int length; | |
2464 | { | |
2465 | Lisp_Object val; | |
2466 | val = make_uninit_multibyte_string (length, length); | |
d5db4077 | 2467 | STRING_SET_UNIBYTE (val); |
2e471eb5 GM |
2468 | return val; |
2469 | } | |
2470 | ||
2471 | ||
2472 | /* Return a multibyte Lisp_String set up to hold NCHARS characters | |
2473 | which occupy NBYTES bytes. */ | |
2474 | ||
2475 | Lisp_Object | |
2476 | make_uninit_multibyte_string (nchars, nbytes) | |
2477 | int nchars, nbytes; | |
2478 | { | |
2479 | Lisp_Object string; | |
2480 | struct Lisp_String *s; | |
2481 | ||
2482 | if (nchars < 0) | |
2483 | abort (); | |
2484 | ||
2485 | s = allocate_string (); | |
2486 | allocate_string_data (s, nchars, nbytes); | |
2487 | XSETSTRING (string, s); | |
2488 | string_chars_consed += nbytes; | |
2489 | return string; | |
2490 | } | |
2491 | ||
2492 | ||
2493 | \f | |
2494 | /*********************************************************************** | |
2495 | Float Allocation | |
2496 | ***********************************************************************/ | |
2497 | ||
2e471eb5 GM |
2498 | /* We store float cells inside of float_blocks, allocating a new |
2499 | float_block with malloc whenever necessary. Float cells reclaimed | |
2500 | by GC are put on a free list to be reallocated before allocating | |
ab6780cd | 2501 | any new float cells from the latest float_block. */ |
2e471eb5 | 2502 | |
d05b383a SM |
2503 | #define FLOAT_BLOCK_SIZE \ |
2504 | (((BLOCK_BYTES - sizeof (struct float_block *) \ | |
2505 | /* The compiler might add padding at the end. */ \ | |
2506 | - (sizeof (struct Lisp_Float) - sizeof (int))) * CHAR_BIT) \ | |
ab6780cd SM |
2507 | / (sizeof (struct Lisp_Float) * CHAR_BIT + 1)) |
2508 | ||
2509 | #define GETMARKBIT(block,n) \ | |
2510 | (((block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2511 | >> ((n) % (sizeof(int) * CHAR_BIT))) \ | |
2512 | & 1) | |
2513 | ||
2514 | #define SETMARKBIT(block,n) \ | |
2515 | (block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2516 | |= 1 << ((n) % (sizeof(int) * CHAR_BIT)) | |
2517 | ||
2518 | #define UNSETMARKBIT(block,n) \ | |
2519 | (block)->gcmarkbits[(n) / (sizeof(int) * CHAR_BIT)] \ | |
2520 | &= ~(1 << ((n) % (sizeof(int) * CHAR_BIT))) | |
2521 | ||
2522 | #define FLOAT_BLOCK(fptr) \ | |
2523 | ((struct float_block *)(((EMACS_UINT)(fptr)) & ~(BLOCK_ALIGN - 1))) | |
2524 | ||
2525 | #define FLOAT_INDEX(fptr) \ | |
2526 | ((((EMACS_UINT)(fptr)) & (BLOCK_ALIGN - 1)) / sizeof (struct Lisp_Float)) | |
2e471eb5 GM |
2527 | |
2528 | struct float_block | |
2529 | { | |
ab6780cd | 2530 | /* Place `floats' at the beginning, to ease up FLOAT_INDEX's job. */ |
2e471eb5 | 2531 | struct Lisp_Float floats[FLOAT_BLOCK_SIZE]; |
ab6780cd SM |
2532 | int gcmarkbits[1 + FLOAT_BLOCK_SIZE / (sizeof(int) * CHAR_BIT)]; |
2533 | struct float_block *next; | |
2e471eb5 GM |
2534 | }; |
2535 | ||
ab6780cd SM |
2536 | #define FLOAT_MARKED_P(fptr) \ |
2537 | GETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2538 | ||
2539 | #define FLOAT_MARK(fptr) \ | |
2540 | SETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2541 | ||
2542 | #define FLOAT_UNMARK(fptr) \ | |
2543 | UNSETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2544 | ||
34400008 GM |
2545 | /* Current float_block. */ |
2546 | ||
2e471eb5 | 2547 | struct float_block *float_block; |
34400008 GM |
2548 | |
2549 | /* Index of first unused Lisp_Float in the current float_block. */ | |
2550 | ||
2e471eb5 GM |
2551 | int float_block_index; |
2552 | ||
2553 | /* Total number of float blocks now in use. */ | |
2554 | ||
2555 | int n_float_blocks; | |
2556 | ||
34400008 GM |
2557 | /* Free-list of Lisp_Floats. */ |
2558 | ||
2e471eb5 GM |
2559 | struct Lisp_Float *float_free_list; |
2560 | ||
34400008 | 2561 | |
966533c9 | 2562 | /* Initialize float allocation. */ |
34400008 | 2563 | |
2e471eb5 GM |
2564 | void |
2565 | init_float () | |
2566 | { | |
08b7c2cb SM |
2567 | float_block = NULL; |
2568 | float_block_index = FLOAT_BLOCK_SIZE; /* Force alloc of new float_block. */ | |
2e471eb5 | 2569 | float_free_list = 0; |
08b7c2cb | 2570 | n_float_blocks = 0; |
2e471eb5 GM |
2571 | } |
2572 | ||
34400008 GM |
2573 | |
2574 | /* Explicitly free a float cell by putting it on the free-list. */ | |
2e471eb5 GM |
2575 | |
2576 | void | |
2577 | free_float (ptr) | |
2578 | struct Lisp_Float *ptr; | |
2579 | { | |
28a099a4 | 2580 | ptr->u.chain = float_free_list; |
2e471eb5 GM |
2581 | float_free_list = ptr; |
2582 | } | |
2583 | ||
34400008 GM |
2584 | |
2585 | /* Return a new float object with value FLOAT_VALUE. */ | |
2586 | ||
2e471eb5 GM |
2587 | Lisp_Object |
2588 | make_float (float_value) | |
2589 | double float_value; | |
2590 | { | |
2591 | register Lisp_Object val; | |
2592 | ||
e2984df0 CY |
2593 | /* eassert (!handling_signal); */ |
2594 | ||
2595 | #ifndef SYNC_INPUT | |
2596 | BLOCK_INPUT; | |
2597 | #endif | |
cfb2f32e | 2598 | |
2e471eb5 GM |
2599 | if (float_free_list) |
2600 | { | |
2601 | /* We use the data field for chaining the free list | |
2602 | so that we won't use the same field that has the mark bit. */ | |
2603 | XSETFLOAT (val, float_free_list); | |
28a099a4 | 2604 | float_free_list = float_free_list->u.chain; |
2e471eb5 GM |
2605 | } |
2606 | else | |
2607 | { | |
2608 | if (float_block_index == FLOAT_BLOCK_SIZE) | |
2609 | { | |
2610 | register struct float_block *new; | |
2611 | ||
ab6780cd SM |
2612 | new = (struct float_block *) lisp_align_malloc (sizeof *new, |
2613 | MEM_TYPE_FLOAT); | |
2e471eb5 | 2614 | new->next = float_block; |
a0668126 | 2615 | bzero ((char *) new->gcmarkbits, sizeof new->gcmarkbits); |
2e471eb5 GM |
2616 | float_block = new; |
2617 | float_block_index = 0; | |
2618 | n_float_blocks++; | |
2619 | } | |
a0668126 SM |
2620 | XSETFLOAT (val, &float_block->floats[float_block_index]); |
2621 | float_block_index++; | |
2e471eb5 | 2622 | } |
177c0ea7 | 2623 | |
e2984df0 CY |
2624 | #ifndef SYNC_INPUT |
2625 | UNBLOCK_INPUT; | |
2626 | #endif | |
2627 | ||
2e471eb5 | 2628 | XFLOAT_DATA (val) = float_value; |
a0668126 | 2629 | eassert (!FLOAT_MARKED_P (XFLOAT (val))); |
2e471eb5 GM |
2630 | consing_since_gc += sizeof (struct Lisp_Float); |
2631 | floats_consed++; | |
2632 | return val; | |
2633 | } | |
2634 | ||
2e471eb5 GM |
2635 | |
2636 | \f | |
2637 | /*********************************************************************** | |
2638 | Cons Allocation | |
2639 | ***********************************************************************/ | |
2640 | ||
2641 | /* We store cons cells inside of cons_blocks, allocating a new | |
2642 | cons_block with malloc whenever necessary. Cons cells reclaimed by | |
2643 | GC are put on a free list to be reallocated before allocating | |
08b7c2cb | 2644 | any new cons cells from the latest cons_block. */ |
2e471eb5 GM |
2645 | |
2646 | #define CONS_BLOCK_SIZE \ | |
08b7c2cb SM |
2647 | (((BLOCK_BYTES - sizeof (struct cons_block *)) * CHAR_BIT) \ |
2648 | / (sizeof (struct Lisp_Cons) * CHAR_BIT + 1)) | |
2649 | ||
2650 | #define CONS_BLOCK(fptr) \ | |
2651 | ((struct cons_block *)(((EMACS_UINT)(fptr)) & ~(BLOCK_ALIGN - 1))) | |
2652 | ||
2653 | #define CONS_INDEX(fptr) \ | |
2654 | ((((EMACS_UINT)(fptr)) & (BLOCK_ALIGN - 1)) / sizeof (struct Lisp_Cons)) | |
2e471eb5 GM |
2655 | |
2656 | struct cons_block | |
2657 | { | |
08b7c2cb | 2658 | /* Place `conses' at the beginning, to ease up CONS_INDEX's job. */ |
2e471eb5 | 2659 | struct Lisp_Cons conses[CONS_BLOCK_SIZE]; |
08b7c2cb SM |
2660 | int gcmarkbits[1 + CONS_BLOCK_SIZE / (sizeof(int) * CHAR_BIT)]; |
2661 | struct cons_block *next; | |
2e471eb5 GM |
2662 | }; |
2663 | ||
08b7c2cb SM |
2664 | #define CONS_MARKED_P(fptr) \ |
2665 | GETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2666 | ||
2667 | #define CONS_MARK(fptr) \ | |
2668 | SETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2669 | ||
2670 | #define CONS_UNMARK(fptr) \ | |
2671 | UNSETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2672 | ||
34400008 GM |
2673 | /* Current cons_block. */ |
2674 | ||
2e471eb5 | 2675 | struct cons_block *cons_block; |
34400008 GM |
2676 | |
2677 | /* Index of first unused Lisp_Cons in the current block. */ | |
2678 | ||
2e471eb5 GM |
2679 | int cons_block_index; |
2680 | ||
34400008 GM |
2681 | /* Free-list of Lisp_Cons structures. */ |
2682 | ||
2e471eb5 GM |
2683 | struct Lisp_Cons *cons_free_list; |
2684 | ||
2685 | /* Total number of cons blocks now in use. */ | |
2686 | ||
2687 | int n_cons_blocks; | |
2688 | ||
34400008 GM |
2689 | |
2690 | /* Initialize cons allocation. */ | |
2691 | ||
2e471eb5 GM |
2692 | void |
2693 | init_cons () | |
2694 | { | |
08b7c2cb SM |
2695 | cons_block = NULL; |
2696 | cons_block_index = CONS_BLOCK_SIZE; /* Force alloc of new cons_block. */ | |
2e471eb5 | 2697 | cons_free_list = 0; |
08b7c2cb | 2698 | n_cons_blocks = 0; |
2e471eb5 GM |
2699 | } |
2700 | ||
34400008 GM |
2701 | |
2702 | /* Explicitly free a cons cell by putting it on the free-list. */ | |
2e471eb5 GM |
2703 | |
2704 | void | |
2705 | free_cons (ptr) | |
2706 | struct Lisp_Cons *ptr; | |
2707 | { | |
28a099a4 | 2708 | ptr->u.chain = cons_free_list; |
34400008 GM |
2709 | #if GC_MARK_STACK |
2710 | ptr->car = Vdead; | |
2711 | #endif | |
2e471eb5 GM |
2712 | cons_free_list = ptr; |
2713 | } | |
2714 | ||
2715 | DEFUN ("cons", Fcons, Scons, 2, 2, 0, | |
a6266d23 | 2716 | doc: /* Create a new cons, give it CAR and CDR as components, and return it. */) |
7ee72033 | 2717 | (car, cdr) |
2e471eb5 GM |
2718 | Lisp_Object car, cdr; |
2719 | { | |
2720 | register Lisp_Object val; | |
2721 | ||
e2984df0 CY |
2722 | /* eassert (!handling_signal); */ |
2723 | ||
2724 | #ifndef SYNC_INPUT | |
2725 | BLOCK_INPUT; | |
2726 | #endif | |
cfb2f32e | 2727 | |
2e471eb5 GM |
2728 | if (cons_free_list) |
2729 | { | |
2730 | /* We use the cdr for chaining the free list | |
2731 | so that we won't use the same field that has the mark bit. */ | |
2732 | XSETCONS (val, cons_free_list); | |
28a099a4 | 2733 | cons_free_list = cons_free_list->u.chain; |
2e471eb5 GM |
2734 | } |
2735 | else | |
2736 | { | |
2737 | if (cons_block_index == CONS_BLOCK_SIZE) | |
2738 | { | |
2739 | register struct cons_block *new; | |
08b7c2cb SM |
2740 | new = (struct cons_block *) lisp_align_malloc (sizeof *new, |
2741 | MEM_TYPE_CONS); | |
a0668126 | 2742 | bzero ((char *) new->gcmarkbits, sizeof new->gcmarkbits); |
2e471eb5 GM |
2743 | new->next = cons_block; |
2744 | cons_block = new; | |
2745 | cons_block_index = 0; | |
2746 | n_cons_blocks++; | |
2747 | } | |
a0668126 SM |
2748 | XSETCONS (val, &cons_block->conses[cons_block_index]); |
2749 | cons_block_index++; | |
2e471eb5 | 2750 | } |
177c0ea7 | 2751 | |
e2984df0 CY |
2752 | #ifndef SYNC_INPUT |
2753 | UNBLOCK_INPUT; | |
2754 | #endif | |
2755 | ||
f3fbd155 KR |
2756 | XSETCAR (val, car); |
2757 | XSETCDR (val, cdr); | |
a0668126 | 2758 | eassert (!CONS_MARKED_P (XCONS (val))); |
2e471eb5 GM |
2759 | consing_since_gc += sizeof (struct Lisp_Cons); |
2760 | cons_cells_consed++; | |
2761 | return val; | |
2762 | } | |
2763 | ||
e3e56238 RS |
2764 | /* Get an error now if there's any junk in the cons free list. */ |
2765 | void | |
2766 | check_cons_list () | |
2767 | { | |
212f33f1 | 2768 | #ifdef GC_CHECK_CONS_LIST |
e3e56238 RS |
2769 | struct Lisp_Cons *tail = cons_free_list; |
2770 | ||
e3e56238 | 2771 | while (tail) |
28a099a4 | 2772 | tail = tail->u.chain; |
e3e56238 RS |
2773 | #endif |
2774 | } | |
34400008 | 2775 | |
2e471eb5 GM |
2776 | /* Make a list of 2, 3, 4 or 5 specified objects. */ |
2777 | ||
2778 | Lisp_Object | |
2779 | list2 (arg1, arg2) | |
2780 | Lisp_Object arg1, arg2; | |
2781 | { | |
2782 | return Fcons (arg1, Fcons (arg2, Qnil)); | |
2783 | } | |
2784 | ||
34400008 | 2785 | |
2e471eb5 GM |
2786 | Lisp_Object |
2787 | list3 (arg1, arg2, arg3) | |
2788 | Lisp_Object arg1, arg2, arg3; | |
2789 | { | |
2790 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Qnil))); | |
2791 | } | |
2792 | ||
34400008 | 2793 | |
2e471eb5 GM |
2794 | Lisp_Object |
2795 | list4 (arg1, arg2, arg3, arg4) | |
2796 | Lisp_Object arg1, arg2, arg3, arg4; | |
2797 | { | |
2798 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, Qnil)))); | |
2799 | } | |
2800 | ||
34400008 | 2801 | |
2e471eb5 GM |
2802 | Lisp_Object |
2803 | list5 (arg1, arg2, arg3, arg4, arg5) | |
2804 | Lisp_Object arg1, arg2, arg3, arg4, arg5; | |
2805 | { | |
2806 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, | |
2807 | Fcons (arg5, Qnil))))); | |
2808 | } | |
2809 | ||
34400008 | 2810 | |
2e471eb5 | 2811 | DEFUN ("list", Flist, Slist, 0, MANY, 0, |
eae936e2 | 2812 | doc: /* Return a newly created list with specified arguments as elements. |
ae8e8122 MB |
2813 | Any number of arguments, even zero arguments, are allowed. |
2814 | usage: (list &rest OBJECTS) */) | |
7ee72033 | 2815 | (nargs, args) |
2e471eb5 GM |
2816 | int nargs; |
2817 | register Lisp_Object *args; | |
2818 | { | |
2819 | register Lisp_Object val; | |
2820 | val = Qnil; | |
2821 | ||
2822 | while (nargs > 0) | |
2823 | { | |
2824 | nargs--; | |
2825 | val = Fcons (args[nargs], val); | |
2826 | } | |
2827 | return val; | |
2828 | } | |
2829 | ||
34400008 | 2830 | |
2e471eb5 | 2831 | DEFUN ("make-list", Fmake_list, Smake_list, 2, 2, 0, |
a6266d23 | 2832 | doc: /* Return a newly created list of length LENGTH, with each element being INIT. */) |
7ee72033 | 2833 | (length, init) |
2e471eb5 GM |
2834 | register Lisp_Object length, init; |
2835 | { | |
2836 | register Lisp_Object val; | |
2837 | register int size; | |
2838 | ||
b7826503 | 2839 | CHECK_NATNUM (length); |
2e471eb5 GM |
2840 | size = XFASTINT (length); |
2841 | ||
2842 | val = Qnil; | |
ce070307 GM |
2843 | while (size > 0) |
2844 | { | |
2845 | val = Fcons (init, val); | |
2846 | --size; | |
2847 | ||
2848 | if (size > 0) | |
2849 | { | |
2850 | val = Fcons (init, val); | |
2851 | --size; | |
177c0ea7 | 2852 | |
ce070307 GM |
2853 | if (size > 0) |
2854 | { | |
2855 | val = Fcons (init, val); | |
2856 | --size; | |
177c0ea7 | 2857 | |
ce070307 GM |
2858 | if (size > 0) |
2859 | { | |
2860 | val = Fcons (init, val); | |
2861 | --size; | |
177c0ea7 | 2862 | |
ce070307 GM |
2863 | if (size > 0) |
2864 | { | |
2865 | val = Fcons (init, val); | |
2866 | --size; | |
2867 | } | |
2868 | } | |
2869 | } | |
2870 | } | |
2871 | ||
2872 | QUIT; | |
2873 | } | |
177c0ea7 | 2874 | |
7146af97 JB |
2875 | return val; |
2876 | } | |
2e471eb5 GM |
2877 | |
2878 | ||
7146af97 | 2879 | \f |
2e471eb5 GM |
2880 | /*********************************************************************** |
2881 | Vector Allocation | |
2882 | ***********************************************************************/ | |
7146af97 | 2883 | |
34400008 GM |
2884 | /* Singly-linked list of all vectors. */ |
2885 | ||
7146af97 JB |
2886 | struct Lisp_Vector *all_vectors; |
2887 | ||
2e471eb5 GM |
2888 | /* Total number of vector-like objects now in use. */ |
2889 | ||
c8099634 RS |
2890 | int n_vectors; |
2891 | ||
34400008 GM |
2892 | |
2893 | /* Value is a pointer to a newly allocated Lisp_Vector structure | |
2894 | with room for LEN Lisp_Objects. */ | |
2895 | ||
ece93c02 GM |
2896 | static struct Lisp_Vector * |
2897 | allocate_vectorlike (len, type) | |
1825c68d | 2898 | EMACS_INT len; |
ece93c02 | 2899 | enum mem_type type; |
1825c68d KH |
2900 | { |
2901 | struct Lisp_Vector *p; | |
675d5130 | 2902 | size_t nbytes; |
1825c68d | 2903 | |
d1658221 | 2904 | #ifdef DOUG_LEA_MALLOC |
f8608968 GM |
2905 | /* Prevent mmap'ing the chunk. Lisp data may not be mmap'ed |
2906 | because mapped region contents are not preserved in | |
2907 | a dumped Emacs. */ | |
de7515d6 | 2908 | BLOCK_INPUT; |
d1658221 | 2909 | mallopt (M_MMAP_MAX, 0); |
de7515d6 | 2910 | UNBLOCK_INPUT; |
d1658221 | 2911 | #endif |
177c0ea7 | 2912 | |
cfb2f32e SM |
2913 | /* This gets triggered by code which I haven't bothered to fix. --Stef */ |
2914 | /* eassert (!handling_signal); */ | |
2915 | ||
34400008 | 2916 | nbytes = sizeof *p + (len - 1) * sizeof p->contents[0]; |
ece93c02 | 2917 | p = (struct Lisp_Vector *) lisp_malloc (nbytes, type); |
177c0ea7 | 2918 | |
d1658221 | 2919 | #ifdef DOUG_LEA_MALLOC |
34400008 | 2920 | /* Back to a reasonable maximum of mmap'ed areas. */ |
de7515d6 | 2921 | BLOCK_INPUT; |
81d492d5 | 2922 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); |
de7515d6 | 2923 | UNBLOCK_INPUT; |
d1658221 | 2924 | #endif |
177c0ea7 | 2925 | |
34400008 | 2926 | consing_since_gc += nbytes; |
310ea200 | 2927 | vector_cells_consed += len; |
1825c68d | 2928 | |
e2984df0 CY |
2929 | #ifndef SYNC_INPUT |
2930 | BLOCK_INPUT; | |
2931 | #endif | |
2932 | ||
1825c68d KH |
2933 | p->next = all_vectors; |
2934 | all_vectors = p; | |
e2984df0 CY |
2935 | |
2936 | #ifndef SYNC_INPUT | |
2937 | UNBLOCK_INPUT; | |
2938 | #endif | |
2939 | ||
34400008 | 2940 | ++n_vectors; |
1825c68d KH |
2941 | return p; |
2942 | } | |
2943 | ||
34400008 | 2944 | |
ece93c02 GM |
2945 | /* Allocate a vector with NSLOTS slots. */ |
2946 | ||
2947 | struct Lisp_Vector * | |
2948 | allocate_vector (nslots) | |
2949 | EMACS_INT nslots; | |
2950 | { | |
2951 | struct Lisp_Vector *v = allocate_vectorlike (nslots, MEM_TYPE_VECTOR); | |
2952 | v->size = nslots; | |
2953 | return v; | |
2954 | } | |
2955 | ||
2956 | ||
2957 | /* Allocate other vector-like structures. */ | |
2958 | ||
2959 | struct Lisp_Hash_Table * | |
2960 | allocate_hash_table () | |
2961 | { | |
2962 | EMACS_INT len = VECSIZE (struct Lisp_Hash_Table); | |
2963 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_HASH_TABLE); | |
2964 | EMACS_INT i; | |
177c0ea7 | 2965 | |
ece93c02 GM |
2966 | v->size = len; |
2967 | for (i = 0; i < len; ++i) | |
2968 | v->contents[i] = Qnil; | |
177c0ea7 | 2969 | |
ece93c02 GM |
2970 | return (struct Lisp_Hash_Table *) v; |
2971 | } | |
2972 | ||
2973 | ||
2974 | struct window * | |
2975 | allocate_window () | |
2976 | { | |
2977 | EMACS_INT len = VECSIZE (struct window); | |
2978 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_WINDOW); | |
2979 | EMACS_INT i; | |
177c0ea7 | 2980 | |
ece93c02 GM |
2981 | for (i = 0; i < len; ++i) |
2982 | v->contents[i] = Qnil; | |
2983 | v->size = len; | |
177c0ea7 | 2984 | |
ece93c02 GM |
2985 | return (struct window *) v; |
2986 | } | |
2987 | ||
2988 | ||
2989 | struct frame * | |
2990 | allocate_frame () | |
2991 | { | |
2992 | EMACS_INT len = VECSIZE (struct frame); | |
2993 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_FRAME); | |
2994 | EMACS_INT i; | |
177c0ea7 | 2995 | |
ece93c02 GM |
2996 | for (i = 0; i < len; ++i) |
2997 | v->contents[i] = make_number (0); | |
2998 | v->size = len; | |
2999 | return (struct frame *) v; | |
3000 | } | |
3001 | ||
3002 | ||
3003 | struct Lisp_Process * | |
3004 | allocate_process () | |
3005 | { | |
6bfd98e7 SM |
3006 | /* Memory-footprint of the object in nb of Lisp_Object fields. */ |
3007 | EMACS_INT memlen = VECSIZE (struct Lisp_Process); | |
3008 | /* Size if we only count the actual Lisp_Object fields (which need to be | |
3009 | traced by the GC). */ | |
3010 | EMACS_INT lisplen = PSEUDOVECSIZE (struct Lisp_Process, pid); | |
3011 | struct Lisp_Vector *v = allocate_vectorlike (memlen, MEM_TYPE_PROCESS); | |
ece93c02 | 3012 | EMACS_INT i; |
177c0ea7 | 3013 | |
6bfd98e7 | 3014 | for (i = 0; i < lisplen; ++i) |
ece93c02 | 3015 | v->contents[i] = Qnil; |
6bfd98e7 | 3016 | v->size = lisplen; |
177c0ea7 | 3017 | |
ece93c02 GM |
3018 | return (struct Lisp_Process *) v; |
3019 | } | |
3020 | ||
3021 | ||
3022 | struct Lisp_Vector * | |
3023 | allocate_other_vector (len) | |
3024 | EMACS_INT len; | |
3025 | { | |
3026 | struct Lisp_Vector *v = allocate_vectorlike (len, MEM_TYPE_VECTOR); | |
3027 | EMACS_INT i; | |
177c0ea7 | 3028 | |
ece93c02 GM |
3029 | for (i = 0; i < len; ++i) |
3030 | v->contents[i] = Qnil; | |
3031 | v->size = len; | |
177c0ea7 | 3032 | |
ece93c02 GM |
3033 | return v; |
3034 | } | |
3035 | ||
3036 | ||
7146af97 | 3037 | DEFUN ("make-vector", Fmake_vector, Smake_vector, 2, 2, 0, |
a6266d23 | 3038 | doc: /* Return a newly created vector of length LENGTH, with each element being INIT. |
7ee72033 MB |
3039 | See also the function `vector'. */) |
3040 | (length, init) | |
7146af97 JB |
3041 | register Lisp_Object length, init; |
3042 | { | |
1825c68d KH |
3043 | Lisp_Object vector; |
3044 | register EMACS_INT sizei; | |
3045 | register int index; | |
7146af97 JB |
3046 | register struct Lisp_Vector *p; |
3047 | ||
b7826503 | 3048 | CHECK_NATNUM (length); |
c9dad5ed | 3049 | sizei = XFASTINT (length); |
7146af97 | 3050 | |
ece93c02 | 3051 | p = allocate_vector (sizei); |
7146af97 JB |
3052 | for (index = 0; index < sizei; index++) |
3053 | p->contents[index] = init; | |
3054 | ||
1825c68d | 3055 | XSETVECTOR (vector, p); |
7146af97 JB |
3056 | return vector; |
3057 | } | |
3058 | ||
34400008 | 3059 | |
a59de17b | 3060 | DEFUN ("make-char-table", Fmake_char_table, Smake_char_table, 1, 2, 0, |
a6266d23 | 3061 | doc: /* Return a newly created char-table, with purpose PURPOSE. |
228299fa GM |
3062 | Each element is initialized to INIT, which defaults to nil. |
3063 | PURPOSE should be a symbol which has a `char-table-extra-slots' property. | |
7ee72033 MB |
3064 | The property's value should be an integer between 0 and 10. */) |
3065 | (purpose, init) | |
a59de17b | 3066 | register Lisp_Object purpose, init; |
7b07587b RS |
3067 | { |
3068 | Lisp_Object vector; | |
a59de17b | 3069 | Lisp_Object n; |
b7826503 | 3070 | CHECK_SYMBOL (purpose); |
0551bde3 | 3071 | n = Fget (purpose, Qchar_table_extra_slots); |
b7826503 | 3072 | CHECK_NUMBER (n); |
7b07587b RS |
3073 | if (XINT (n) < 0 || XINT (n) > 10) |
3074 | args_out_of_range (n, Qnil); | |
3075 | /* Add 2 to the size for the defalt and parent slots. */ | |
3076 | vector = Fmake_vector (make_number (CHAR_TABLE_STANDARD_SLOTS + XINT (n)), | |
3077 | init); | |
0551bde3 | 3078 | XCHAR_TABLE (vector)->top = Qt; |
c96a008c | 3079 | XCHAR_TABLE (vector)->parent = Qnil; |
a59de17b | 3080 | XCHAR_TABLE (vector)->purpose = purpose; |
7b07587b RS |
3081 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); |
3082 | return vector; | |
3083 | } | |
3084 | ||
34400008 | 3085 | |
2a7a8e99 | 3086 | /* Return a newly created sub char table with slots initialized by INIT. |
0551bde3 KH |
3087 | Since a sub char table does not appear as a top level Emacs Lisp |
3088 | object, we don't need a Lisp interface to make it. */ | |
3089 | ||
3090 | Lisp_Object | |
2a7a8e99 KH |
3091 | make_sub_char_table (init) |
3092 | Lisp_Object init; | |
0551bde3 KH |
3093 | { |
3094 | Lisp_Object vector | |
2a7a8e99 | 3095 | = Fmake_vector (make_number (SUB_CHAR_TABLE_STANDARD_SLOTS), init); |
0551bde3 | 3096 | XCHAR_TABLE (vector)->top = Qnil; |
2a7a8e99 | 3097 | XCHAR_TABLE (vector)->defalt = Qnil; |
0551bde3 KH |
3098 | XSETCHAR_TABLE (vector, XCHAR_TABLE (vector)); |
3099 | return vector; | |
3100 | } | |
3101 | ||
34400008 | 3102 | |
7146af97 | 3103 | DEFUN ("vector", Fvector, Svector, 0, MANY, 0, |
eae936e2 | 3104 | doc: /* Return a newly created vector with specified arguments as elements. |
ae8e8122 MB |
3105 | Any number of arguments, even zero arguments, are allowed. |
3106 | usage: (vector &rest OBJECTS) */) | |
7ee72033 | 3107 | (nargs, args) |
7146af97 JB |
3108 | register int nargs; |
3109 | Lisp_Object *args; | |
3110 | { | |
3111 | register Lisp_Object len, val; | |
3112 | register int index; | |
3113 | register struct Lisp_Vector *p; | |
3114 | ||
67ba9986 | 3115 | XSETFASTINT (len, nargs); |
7146af97 JB |
3116 | val = Fmake_vector (len, Qnil); |
3117 | p = XVECTOR (val); | |
3118 | for (index = 0; index < nargs; index++) | |
3119 | p->contents[index] = args[index]; | |
3120 | return val; | |
3121 | } | |
3122 | ||
34400008 | 3123 | |
7146af97 | 3124 | DEFUN ("make-byte-code", Fmake_byte_code, Smake_byte_code, 4, MANY, 0, |
a6266d23 | 3125 | doc: /* Create a byte-code object with specified arguments as elements. |
228299fa GM |
3126 | The arguments should be the arglist, bytecode-string, constant vector, |
3127 | stack size, (optional) doc string, and (optional) interactive spec. | |
3128 | The first four arguments are required; at most six have any | |
ae8e8122 | 3129 | significance. |
92cc28b2 | 3130 | usage: (make-byte-code ARGLIST BYTE-CODE CONSTANTS DEPTH &optional DOCSTRING INTERACTIVE-SPEC &rest ELEMENTS) */) |
7ee72033 | 3131 | (nargs, args) |
7146af97 JB |
3132 | register int nargs; |
3133 | Lisp_Object *args; | |
3134 | { | |
3135 | register Lisp_Object len, val; | |
3136 | register int index; | |
3137 | register struct Lisp_Vector *p; | |
3138 | ||
67ba9986 | 3139 | XSETFASTINT (len, nargs); |
265a9e55 | 3140 | if (!NILP (Vpurify_flag)) |
5a053ea9 | 3141 | val = make_pure_vector ((EMACS_INT) nargs); |
7146af97 JB |
3142 | else |
3143 | val = Fmake_vector (len, Qnil); | |
9eac9d59 KH |
3144 | |
3145 | if (STRINGP (args[1]) && STRING_MULTIBYTE (args[1])) | |
3146 | /* BYTECODE-STRING must have been produced by Emacs 20.2 or the | |
3147 | earlier because they produced a raw 8-bit string for byte-code | |
3148 | and now such a byte-code string is loaded as multibyte while | |
3149 | raw 8-bit characters converted to multibyte form. Thus, now we | |
3150 | must convert them back to the original unibyte form. */ | |
3151 | args[1] = Fstring_as_unibyte (args[1]); | |
3152 | ||
7146af97 JB |
3153 | p = XVECTOR (val); |
3154 | for (index = 0; index < nargs; index++) | |
3155 | { | |
265a9e55 | 3156 | if (!NILP (Vpurify_flag)) |
7146af97 JB |
3157 | args[index] = Fpurecopy (args[index]); |
3158 | p->contents[index] = args[index]; | |
3159 | } | |
50aee051 | 3160 | XSETCOMPILED (val, p); |
7146af97 JB |
3161 | return val; |
3162 | } | |
2e471eb5 | 3163 | |
34400008 | 3164 | |
7146af97 | 3165 | \f |
2e471eb5 GM |
3166 | /*********************************************************************** |
3167 | Symbol Allocation | |
3168 | ***********************************************************************/ | |
7146af97 | 3169 | |
2e471eb5 GM |
3170 | /* Each symbol_block is just under 1020 bytes long, since malloc |
3171 | really allocates in units of powers of two and uses 4 bytes for its | |
3172 | own overhead. */ | |
7146af97 JB |
3173 | |
3174 | #define SYMBOL_BLOCK_SIZE \ | |
3175 | ((1020 - sizeof (struct symbol_block *)) / sizeof (struct Lisp_Symbol)) | |
3176 | ||
3177 | struct symbol_block | |
2e471eb5 | 3178 | { |
d05b383a | 3179 | /* Place `symbols' first, to preserve alignment. */ |
2e471eb5 | 3180 | struct Lisp_Symbol symbols[SYMBOL_BLOCK_SIZE]; |
d05b383a | 3181 | struct symbol_block *next; |
2e471eb5 | 3182 | }; |
7146af97 | 3183 | |
34400008 GM |
3184 | /* Current symbol block and index of first unused Lisp_Symbol |
3185 | structure in it. */ | |
3186 | ||
7146af97 JB |
3187 | struct symbol_block *symbol_block; |
3188 | int symbol_block_index; | |
3189 | ||
34400008 GM |
3190 | /* List of free symbols. */ |
3191 | ||
7146af97 JB |
3192 | struct Lisp_Symbol *symbol_free_list; |
3193 | ||
c8099634 | 3194 | /* Total number of symbol blocks now in use. */ |
2e471eb5 | 3195 | |
c8099634 RS |
3196 | int n_symbol_blocks; |
3197 | ||
34400008 GM |
3198 | |
3199 | /* Initialize symbol allocation. */ | |
3200 | ||
7146af97 JB |
3201 | void |
3202 | init_symbol () | |
3203 | { | |
0930c1a1 SM |
3204 | symbol_block = NULL; |
3205 | symbol_block_index = SYMBOL_BLOCK_SIZE; | |
7146af97 | 3206 | symbol_free_list = 0; |
0930c1a1 | 3207 | n_symbol_blocks = 0; |
7146af97 JB |
3208 | } |
3209 | ||
34400008 | 3210 | |
7146af97 | 3211 | DEFUN ("make-symbol", Fmake_symbol, Smake_symbol, 1, 1, 0, |
a6266d23 | 3212 | doc: /* Return a newly allocated uninterned symbol whose name is NAME. |
7ee72033 MB |
3213 | Its value and function definition are void, and its property list is nil. */) |
3214 | (name) | |
54ee42dd | 3215 | Lisp_Object name; |
7146af97 JB |
3216 | { |
3217 | register Lisp_Object val; | |
3218 | register struct Lisp_Symbol *p; | |
3219 | ||
b7826503 | 3220 | CHECK_STRING (name); |
7146af97 | 3221 | |
537407f0 | 3222 | /* eassert (!handling_signal); */ |
cfb2f32e | 3223 | |
e2984df0 CY |
3224 | #ifndef SYNC_INPUT |
3225 | BLOCK_INPUT; | |
3226 | #endif | |
3227 | ||
7146af97 JB |
3228 | if (symbol_free_list) |
3229 | { | |
45d12a89 | 3230 | XSETSYMBOL (val, symbol_free_list); |
28a099a4 | 3231 | symbol_free_list = symbol_free_list->next; |
7146af97 JB |
3232 | } |
3233 | else | |
3234 | { | |
3235 | if (symbol_block_index == SYMBOL_BLOCK_SIZE) | |
3236 | { | |
3c06d205 | 3237 | struct symbol_block *new; |
34400008 GM |
3238 | new = (struct symbol_block *) lisp_malloc (sizeof *new, |
3239 | MEM_TYPE_SYMBOL); | |
7146af97 JB |
3240 | new->next = symbol_block; |
3241 | symbol_block = new; | |
3242 | symbol_block_index = 0; | |
c8099634 | 3243 | n_symbol_blocks++; |
7146af97 | 3244 | } |
a0668126 SM |
3245 | XSETSYMBOL (val, &symbol_block->symbols[symbol_block_index]); |
3246 | symbol_block_index++; | |
7146af97 | 3247 | } |
177c0ea7 | 3248 | |
e2984df0 CY |
3249 | #ifndef SYNC_INPUT |
3250 | UNBLOCK_INPUT; | |
3251 | #endif | |
3252 | ||
7146af97 | 3253 | p = XSYMBOL (val); |
8fe5665d | 3254 | p->xname = name; |
7146af97 | 3255 | p->plist = Qnil; |
2e471eb5 GM |
3256 | p->value = Qunbound; |
3257 | p->function = Qunbound; | |
9e713715 | 3258 | p->next = NULL; |
2336fe58 | 3259 | p->gcmarkbit = 0; |
9e713715 GM |
3260 | p->interned = SYMBOL_UNINTERNED; |
3261 | p->constant = 0; | |
3262 | p->indirect_variable = 0; | |
2e471eb5 GM |
3263 | consing_since_gc += sizeof (struct Lisp_Symbol); |
3264 | symbols_consed++; | |
7146af97 JB |
3265 | return val; |
3266 | } | |
3267 | ||
3f25e183 | 3268 | |
2e471eb5 GM |
3269 | \f |
3270 | /*********************************************************************** | |
34400008 | 3271 | Marker (Misc) Allocation |
2e471eb5 | 3272 | ***********************************************************************/ |
3f25e183 | 3273 | |
2e471eb5 GM |
3274 | /* Allocation of markers and other objects that share that structure. |
3275 | Works like allocation of conses. */ | |
c0696668 | 3276 | |
2e471eb5 GM |
3277 | #define MARKER_BLOCK_SIZE \ |
3278 | ((1020 - sizeof (struct marker_block *)) / sizeof (union Lisp_Misc)) | |
3279 | ||
3280 | struct marker_block | |
c0696668 | 3281 | { |
d05b383a | 3282 | /* Place `markers' first, to preserve alignment. */ |
2e471eb5 | 3283 | union Lisp_Misc markers[MARKER_BLOCK_SIZE]; |
d05b383a | 3284 | struct marker_block *next; |
2e471eb5 | 3285 | }; |
c0696668 | 3286 | |
2e471eb5 GM |
3287 | struct marker_block *marker_block; |
3288 | int marker_block_index; | |
c0696668 | 3289 | |
2e471eb5 | 3290 | union Lisp_Misc *marker_free_list; |
c0696668 | 3291 | |
2e471eb5 | 3292 | /* Total number of marker blocks now in use. */ |
3f25e183 | 3293 | |
2e471eb5 GM |
3294 | int n_marker_blocks; |
3295 | ||
3296 | void | |
3297 | init_marker () | |
3f25e183 | 3298 | { |
0930c1a1 SM |
3299 | marker_block = NULL; |
3300 | marker_block_index = MARKER_BLOCK_SIZE; | |
2e471eb5 | 3301 | marker_free_list = 0; |
0930c1a1 | 3302 | n_marker_blocks = 0; |
3f25e183 RS |
3303 | } |
3304 | ||
2e471eb5 GM |
3305 | /* Return a newly allocated Lisp_Misc object, with no substructure. */ |
3306 | ||
3f25e183 | 3307 | Lisp_Object |
2e471eb5 | 3308 | allocate_misc () |
7146af97 | 3309 | { |
2e471eb5 | 3310 | Lisp_Object val; |
7146af97 | 3311 | |
e2984df0 CY |
3312 | /* eassert (!handling_signal); */ |
3313 | ||
3314 | #ifndef SYNC_INPUT | |
3315 | BLOCK_INPUT; | |
3316 | #endif | |
cfb2f32e | 3317 | |
2e471eb5 | 3318 | if (marker_free_list) |
7146af97 | 3319 | { |
2e471eb5 GM |
3320 | XSETMISC (val, marker_free_list); |
3321 | marker_free_list = marker_free_list->u_free.chain; | |
7146af97 JB |
3322 | } |
3323 | else | |
7146af97 | 3324 | { |
2e471eb5 GM |
3325 | if (marker_block_index == MARKER_BLOCK_SIZE) |
3326 | { | |
3327 | struct marker_block *new; | |
34400008 GM |
3328 | new = (struct marker_block *) lisp_malloc (sizeof *new, |
3329 | MEM_TYPE_MISC); | |
2e471eb5 GM |
3330 | new->next = marker_block; |
3331 | marker_block = new; | |
3332 | marker_block_index = 0; | |
3333 | n_marker_blocks++; | |
7b7990cc | 3334 | total_free_markers += MARKER_BLOCK_SIZE; |
2e471eb5 | 3335 | } |
a0668126 SM |
3336 | XSETMISC (val, &marker_block->markers[marker_block_index]); |
3337 | marker_block_index++; | |
7146af97 | 3338 | } |
177c0ea7 | 3339 | |
e2984df0 CY |
3340 | #ifndef SYNC_INPUT |
3341 | UNBLOCK_INPUT; | |
3342 | #endif | |
3343 | ||
7b7990cc | 3344 | --total_free_markers; |
2e471eb5 GM |
3345 | consing_since_gc += sizeof (union Lisp_Misc); |
3346 | misc_objects_consed++; | |
2336fe58 | 3347 | XMARKER (val)->gcmarkbit = 0; |
2e471eb5 GM |
3348 | return val; |
3349 | } | |
3350 | ||
7b7990cc KS |
3351 | /* Free a Lisp_Misc object */ |
3352 | ||
3353 | void | |
3354 | free_misc (misc) | |
3355 | Lisp_Object misc; | |
3356 | { | |
3357 | XMISC (misc)->u_marker.type = Lisp_Misc_Free; | |
3358 | XMISC (misc)->u_free.chain = marker_free_list; | |
3359 | marker_free_list = XMISC (misc); | |
3360 | ||
3361 | total_free_markers++; | |
3362 | } | |
3363 | ||
42172a6b RS |
3364 | /* Return a Lisp_Misc_Save_Value object containing POINTER and |
3365 | INTEGER. This is used to package C values to call record_unwind_protect. | |
3366 | The unwind function can get the C values back using XSAVE_VALUE. */ | |
3367 | ||
3368 | Lisp_Object | |
3369 | make_save_value (pointer, integer) | |
3370 | void *pointer; | |
3371 | int integer; | |
3372 | { | |
3373 | register Lisp_Object val; | |
3374 | register struct Lisp_Save_Value *p; | |
3375 | ||
3376 | val = allocate_misc (); | |
3377 | XMISCTYPE (val) = Lisp_Misc_Save_Value; | |
3378 | p = XSAVE_VALUE (val); | |
3379 | p->pointer = pointer; | |
3380 | p->integer = integer; | |
b766f870 | 3381 | p->dogc = 0; |
42172a6b RS |
3382 | return val; |
3383 | } | |
3384 | ||
2e471eb5 | 3385 | DEFUN ("make-marker", Fmake_marker, Smake_marker, 0, 0, 0, |
a6266d23 | 3386 | doc: /* Return a newly allocated marker which does not point at any place. */) |
7ee72033 | 3387 | () |
2e471eb5 GM |
3388 | { |
3389 | register Lisp_Object val; | |
3390 | register struct Lisp_Marker *p; | |
7146af97 | 3391 | |
2e471eb5 GM |
3392 | val = allocate_misc (); |
3393 | XMISCTYPE (val) = Lisp_Misc_Marker; | |
3394 | p = XMARKER (val); | |
3395 | p->buffer = 0; | |
3396 | p->bytepos = 0; | |
3397 | p->charpos = 0; | |
ef89c2ce | 3398 | p->next = NULL; |
2e471eb5 | 3399 | p->insertion_type = 0; |
7146af97 JB |
3400 | return val; |
3401 | } | |
2e471eb5 GM |
3402 | |
3403 | /* Put MARKER back on the free list after using it temporarily. */ | |
3404 | ||
3405 | void | |
3406 | free_marker (marker) | |
3407 | Lisp_Object marker; | |
3408 | { | |
ef89c2ce | 3409 | unchain_marker (XMARKER (marker)); |
7b7990cc | 3410 | free_misc (marker); |
2e471eb5 GM |
3411 | } |
3412 | ||
c0696668 | 3413 | \f |
7146af97 | 3414 | /* Return a newly created vector or string with specified arguments as |
736471d1 RS |
3415 | elements. If all the arguments are characters that can fit |
3416 | in a string of events, make a string; otherwise, make a vector. | |
3417 | ||
3418 | Any number of arguments, even zero arguments, are allowed. */ | |
7146af97 JB |
3419 | |
3420 | Lisp_Object | |
736471d1 | 3421 | make_event_array (nargs, args) |
7146af97 JB |
3422 | register int nargs; |
3423 | Lisp_Object *args; | |
3424 | { | |
3425 | int i; | |
3426 | ||
3427 | for (i = 0; i < nargs; i++) | |
736471d1 | 3428 | /* The things that fit in a string |
c9ca4659 RS |
3429 | are characters that are in 0...127, |
3430 | after discarding the meta bit and all the bits above it. */ | |
e687453f | 3431 | if (!INTEGERP (args[i]) |
c9ca4659 | 3432 | || (XUINT (args[i]) & ~(-CHAR_META)) >= 0200) |
7146af97 JB |
3433 | return Fvector (nargs, args); |
3434 | ||
3435 | /* Since the loop exited, we know that all the things in it are | |
3436 | characters, so we can make a string. */ | |
3437 | { | |
c13ccad2 | 3438 | Lisp_Object result; |
177c0ea7 | 3439 | |
50aee051 | 3440 | result = Fmake_string (make_number (nargs), make_number (0)); |
7146af97 | 3441 | for (i = 0; i < nargs; i++) |
736471d1 | 3442 | { |
46e7e6b0 | 3443 | SSET (result, i, XINT (args[i])); |
736471d1 RS |
3444 | /* Move the meta bit to the right place for a string char. */ |
3445 | if (XINT (args[i]) & CHAR_META) | |
46e7e6b0 | 3446 | SSET (result, i, SREF (result, i) | 0x80); |
736471d1 | 3447 | } |
177c0ea7 | 3448 | |
7146af97 JB |
3449 | return result; |
3450 | } | |
3451 | } | |
2e471eb5 GM |
3452 | |
3453 | ||
7146af97 | 3454 | \f |
24d8a105 RS |
3455 | /************************************************************************ |
3456 | Memory Full Handling | |
3457 | ************************************************************************/ | |
3458 | ||
3459 | ||
3460 | /* Called if malloc returns zero. */ | |
3461 | ||
3462 | void | |
3463 | memory_full () | |
3464 | { | |
3465 | int i; | |
3466 | ||
3467 | Vmemory_full = Qt; | |
3468 | ||
3469 | memory_full_cons_threshold = sizeof (struct cons_block); | |
3470 | ||
3471 | /* The first time we get here, free the spare memory. */ | |
3472 | for (i = 0; i < sizeof (spare_memory) / sizeof (char *); i++) | |
3473 | if (spare_memory[i]) | |
3474 | { | |
3475 | if (i == 0) | |
3476 | free (spare_memory[i]); | |
3477 | else if (i >= 1 && i <= 4) | |
3478 | lisp_align_free (spare_memory[i]); | |
3479 | else | |
3480 | lisp_free (spare_memory[i]); | |
3481 | spare_memory[i] = 0; | |
3482 | } | |
3483 | ||
3484 | /* Record the space now used. When it decreases substantially, | |
3485 | we can refill the memory reserve. */ | |
3486 | #ifndef SYSTEM_MALLOC | |
3487 | bytes_used_when_full = BYTES_USED; | |
3488 | #endif | |
3489 | ||
3490 | /* This used to call error, but if we've run out of memory, we could | |
3491 | get infinite recursion trying to build the string. */ | |
3492 | while (1) | |
3493 | Fsignal (Qnil, Vmemory_signal_data); | |
3494 | } | |
3495 | ||
3496 | /* If we released our reserve (due to running out of memory), | |
3497 | and we have a fair amount free once again, | |
3498 | try to set aside another reserve in case we run out once more. | |
3499 | ||
3500 | This is called when a relocatable block is freed in ralloc.c, | |
3501 | and also directly from this file, in case we're not using ralloc.c. */ | |
3502 | ||
3503 | void | |
3504 | refill_memory_reserve () | |
3505 | { | |
3506 | #ifndef SYSTEM_MALLOC | |
3507 | if (spare_memory[0] == 0) | |
3508 | spare_memory[0] = (char *) malloc ((size_t) SPARE_MEMORY); | |
3509 | if (spare_memory[1] == 0) | |
3510 | spare_memory[1] = (char *) lisp_align_malloc (sizeof (struct cons_block), | |
3511 | MEM_TYPE_CONS); | |
3512 | if (spare_memory[2] == 0) | |
3513 | spare_memory[2] = (char *) lisp_align_malloc (sizeof (struct cons_block), | |
3514 | MEM_TYPE_CONS); | |
3515 | if (spare_memory[3] == 0) | |
3516 | spare_memory[3] = (char *) lisp_align_malloc (sizeof (struct cons_block), | |
3517 | MEM_TYPE_CONS); | |
3518 | if (spare_memory[4] == 0) | |
3519 | spare_memory[4] = (char *) lisp_align_malloc (sizeof (struct cons_block), | |
3520 | MEM_TYPE_CONS); | |
3521 | if (spare_memory[5] == 0) | |
3522 | spare_memory[5] = (char *) lisp_malloc (sizeof (struct string_block), | |
3523 | MEM_TYPE_STRING); | |
3524 | if (spare_memory[6] == 0) | |
3525 | spare_memory[6] = (char *) lisp_malloc (sizeof (struct string_block), | |
3526 | MEM_TYPE_STRING); | |
3527 | if (spare_memory[0] && spare_memory[1] && spare_memory[5]) | |
3528 | Vmemory_full = Qnil; | |
3529 | #endif | |
3530 | } | |
3531 | \f | |
34400008 GM |
3532 | /************************************************************************ |
3533 | C Stack Marking | |
3534 | ************************************************************************/ | |
3535 | ||
13c844fb GM |
3536 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
3537 | ||
71cf5fa0 GM |
3538 | /* Conservative C stack marking requires a method to identify possibly |
3539 | live Lisp objects given a pointer value. We do this by keeping | |
3540 | track of blocks of Lisp data that are allocated in a red-black tree | |
3541 | (see also the comment of mem_node which is the type of nodes in | |
3542 | that tree). Function lisp_malloc adds information for an allocated | |
3543 | block to the red-black tree with calls to mem_insert, and function | |
3544 | lisp_free removes it with mem_delete. Functions live_string_p etc | |
3545 | call mem_find to lookup information about a given pointer in the | |
3546 | tree, and use that to determine if the pointer points to a Lisp | |
3547 | object or not. */ | |
3548 | ||
34400008 GM |
3549 | /* Initialize this part of alloc.c. */ |
3550 | ||
3551 | static void | |
3552 | mem_init () | |
3553 | { | |
3554 | mem_z.left = mem_z.right = MEM_NIL; | |
3555 | mem_z.parent = NULL; | |
3556 | mem_z.color = MEM_BLACK; | |
3557 | mem_z.start = mem_z.end = NULL; | |
3558 | mem_root = MEM_NIL; | |
3559 | } | |
3560 | ||
3561 | ||
3562 | /* Value is a pointer to the mem_node containing START. Value is | |
3563 | MEM_NIL if there is no node in the tree containing START. */ | |
3564 | ||
3565 | static INLINE struct mem_node * | |
3566 | mem_find (start) | |
3567 | void *start; | |
3568 | { | |
3569 | struct mem_node *p; | |
3570 | ||
ece93c02 GM |
3571 | if (start < min_heap_address || start > max_heap_address) |
3572 | return MEM_NIL; | |
3573 | ||
34400008 GM |
3574 | /* Make the search always successful to speed up the loop below. */ |
3575 | mem_z.start = start; | |
3576 | mem_z.end = (char *) start + 1; | |
3577 | ||
3578 | p = mem_root; | |
3579 | while (start < p->start || start >= p->end) | |
3580 | p = start < p->start ? p->left : p->right; | |
3581 | return p; | |
3582 | } | |
3583 | ||
3584 | ||
3585 | /* Insert a new node into the tree for a block of memory with start | |
3586 | address START, end address END, and type TYPE. Value is a | |
3587 | pointer to the node that was inserted. */ | |
3588 | ||
3589 | static struct mem_node * | |
3590 | mem_insert (start, end, type) | |
3591 | void *start, *end; | |
3592 | enum mem_type type; | |
3593 | { | |
3594 | struct mem_node *c, *parent, *x; | |
3595 | ||
ece93c02 GM |
3596 | if (start < min_heap_address) |
3597 | min_heap_address = start; | |
3598 | if (end > max_heap_address) | |
3599 | max_heap_address = end; | |
3600 | ||
34400008 GM |
3601 | /* See where in the tree a node for START belongs. In this |
3602 | particular application, it shouldn't happen that a node is already | |
3603 | present. For debugging purposes, let's check that. */ | |
3604 | c = mem_root; | |
3605 | parent = NULL; | |
3606 | ||
3607 | #if GC_MARK_STACK != GC_MAKE_GCPROS_NOOPS | |
177c0ea7 | 3608 | |
34400008 GM |
3609 | while (c != MEM_NIL) |
3610 | { | |
3611 | if (start >= c->start && start < c->end) | |
3612 | abort (); | |
3613 | parent = c; | |
3614 | c = start < c->start ? c->left : c->right; | |
3615 | } | |
177c0ea7 | 3616 | |
34400008 | 3617 | #else /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ |
177c0ea7 | 3618 | |
34400008 GM |
3619 | while (c != MEM_NIL) |
3620 | { | |
3621 | parent = c; | |
3622 | c = start < c->start ? c->left : c->right; | |
3623 | } | |
177c0ea7 | 3624 | |
34400008 GM |
3625 | #endif /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ |
3626 | ||
3627 | /* Create a new node. */ | |
877935b1 GM |
3628 | #ifdef GC_MALLOC_CHECK |
3629 | x = (struct mem_node *) _malloc_internal (sizeof *x); | |
3630 | if (x == NULL) | |
3631 | abort (); | |
3632 | #else | |
34400008 | 3633 | x = (struct mem_node *) xmalloc (sizeof *x); |
877935b1 | 3634 | #endif |
34400008 GM |
3635 | x->start = start; |
3636 | x->end = end; | |
3637 | x->type = type; | |
3638 | x->parent = parent; | |
3639 | x->left = x->right = MEM_NIL; | |
3640 | x->color = MEM_RED; | |
3641 | ||
3642 | /* Insert it as child of PARENT or install it as root. */ | |
3643 | if (parent) | |
3644 | { | |
3645 | if (start < parent->start) | |
3646 | parent->left = x; | |
3647 | else | |
3648 | parent->right = x; | |
3649 | } | |
177c0ea7 | 3650 | else |
34400008 GM |
3651 | mem_root = x; |
3652 | ||
3653 | /* Re-establish red-black tree properties. */ | |
3654 | mem_insert_fixup (x); | |
877935b1 | 3655 | |
34400008 GM |
3656 | return x; |
3657 | } | |
3658 | ||
3659 | ||
3660 | /* Re-establish the red-black properties of the tree, and thereby | |
3661 | balance the tree, after node X has been inserted; X is always red. */ | |
3662 | ||
3663 | static void | |
3664 | mem_insert_fixup (x) | |
3665 | struct mem_node *x; | |
3666 | { | |
3667 | while (x != mem_root && x->parent->color == MEM_RED) | |
3668 | { | |
3669 | /* X is red and its parent is red. This is a violation of | |
3670 | red-black tree property #3. */ | |
177c0ea7 | 3671 | |
34400008 GM |
3672 | if (x->parent == x->parent->parent->left) |
3673 | { | |
3674 | /* We're on the left side of our grandparent, and Y is our | |
3675 | "uncle". */ | |
3676 | struct mem_node *y = x->parent->parent->right; | |
177c0ea7 | 3677 | |
34400008 GM |
3678 | if (y->color == MEM_RED) |
3679 | { | |
3680 | /* Uncle and parent are red but should be black because | |
3681 | X is red. Change the colors accordingly and proceed | |
3682 | with the grandparent. */ | |
3683 | x->parent->color = MEM_BLACK; | |
3684 | y->color = MEM_BLACK; | |
3685 | x->parent->parent->color = MEM_RED; | |
3686 | x = x->parent->parent; | |
3687 | } | |
3688 | else | |
3689 | { | |
3690 | /* Parent and uncle have different colors; parent is | |
3691 | red, uncle is black. */ | |
3692 | if (x == x->parent->right) | |
3693 | { | |
3694 | x = x->parent; | |
3695 | mem_rotate_left (x); | |
3696 | } | |
3697 | ||
3698 | x->parent->color = MEM_BLACK; | |
3699 | x->parent->parent->color = MEM_RED; | |
3700 | mem_rotate_right (x->parent->parent); | |
3701 | } | |
3702 | } | |
3703 | else | |
3704 | { | |
3705 | /* This is the symmetrical case of above. */ | |
3706 | struct mem_node *y = x->parent->parent->left; | |
177c0ea7 | 3707 | |
34400008 GM |
3708 | if (y->color == MEM_RED) |
3709 | { | |
3710 | x->parent->color = MEM_BLACK; | |
3711 | y->color = MEM_BLACK; | |
3712 | x->parent->parent->color = MEM_RED; | |
3713 | x = x->parent->parent; | |
3714 | } | |
3715 | else | |
3716 | { | |
3717 | if (x == x->parent->left) | |
3718 | { | |
3719 | x = x->parent; | |
3720 | mem_rotate_right (x); | |
3721 | } | |
177c0ea7 | 3722 | |
34400008 GM |
3723 | x->parent->color = MEM_BLACK; |
3724 | x->parent->parent->color = MEM_RED; | |
3725 | mem_rotate_left (x->parent->parent); | |
3726 | } | |
3727 | } | |
3728 | } | |
3729 | ||
3730 | /* The root may have been changed to red due to the algorithm. Set | |
3731 | it to black so that property #5 is satisfied. */ | |
3732 | mem_root->color = MEM_BLACK; | |
3733 | } | |
3734 | ||
3735 | ||
177c0ea7 JB |
3736 | /* (x) (y) |
3737 | / \ / \ | |
34400008 GM |
3738 | a (y) ===> (x) c |
3739 | / \ / \ | |
3740 | b c a b */ | |
3741 | ||
3742 | static void | |
3743 | mem_rotate_left (x) | |
3744 | struct mem_node *x; | |
3745 | { | |
3746 | struct mem_node *y; | |
3747 | ||
3748 | /* Turn y's left sub-tree into x's right sub-tree. */ | |
3749 | y = x->right; | |
3750 | x->right = y->left; | |
3751 | if (y->left != MEM_NIL) | |
3752 | y->left->parent = x; | |
3753 | ||
3754 | /* Y's parent was x's parent. */ | |
3755 | if (y != MEM_NIL) | |
3756 | y->parent = x->parent; | |
3757 | ||
3758 | /* Get the parent to point to y instead of x. */ | |
3759 | if (x->parent) | |
3760 | { | |
3761 | if (x == x->parent->left) | |
3762 | x->parent->left = y; | |
3763 | else | |
3764 | x->parent->right = y; | |
3765 | } | |
3766 | else | |
3767 | mem_root = y; | |
3768 | ||
3769 | /* Put x on y's left. */ | |
3770 | y->left = x; | |
3771 | if (x != MEM_NIL) | |
3772 | x->parent = y; | |
3773 | } | |
3774 | ||
3775 | ||
177c0ea7 JB |
3776 | /* (x) (Y) |
3777 | / \ / \ | |
3778 | (y) c ===> a (x) | |
3779 | / \ / \ | |
34400008 GM |
3780 | a b b c */ |
3781 | ||
3782 | static void | |
3783 | mem_rotate_right (x) | |
3784 | struct mem_node *x; | |
3785 | { | |
3786 | struct mem_node *y = x->left; | |
3787 | ||
3788 | x->left = y->right; | |
3789 | if (y->right != MEM_NIL) | |
3790 | y->right->parent = x; | |
177c0ea7 | 3791 | |
34400008 GM |
3792 | if (y != MEM_NIL) |
3793 | y->parent = x->parent; | |
3794 | if (x->parent) | |
3795 | { | |
3796 | if (x == x->parent->right) | |
3797 | x->parent->right = y; | |
3798 | else | |
3799 | x->parent->left = y; | |
3800 | } | |
3801 | else | |
3802 | mem_root = y; | |
177c0ea7 | 3803 | |
34400008 GM |
3804 | y->right = x; |
3805 | if (x != MEM_NIL) | |
3806 | x->parent = y; | |
3807 | } | |
3808 | ||
3809 | ||
3810 | /* Delete node Z from the tree. If Z is null or MEM_NIL, do nothing. */ | |
3811 | ||
3812 | static void | |
3813 | mem_delete (z) | |
3814 | struct mem_node *z; | |
3815 | { | |
3816 | struct mem_node *x, *y; | |
3817 | ||
3818 | if (!z || z == MEM_NIL) | |
3819 | return; | |
3820 | ||
3821 | if (z->left == MEM_NIL || z->right == MEM_NIL) | |
3822 | y = z; | |
3823 | else | |
3824 | { | |
3825 | y = z->right; | |
3826 | while (y->left != MEM_NIL) | |
3827 | y = y->left; | |
3828 | } | |
3829 | ||
3830 | if (y->left != MEM_NIL) | |
3831 | x = y->left; | |
3832 | else | |
3833 | x = y->right; | |
3834 | ||
3835 | x->parent = y->parent; | |
3836 | if (y->parent) | |
3837 | { | |
3838 | if (y == y->parent->left) | |
3839 | y->parent->left = x; | |
3840 | else | |
3841 | y->parent->right = x; | |
3842 | } | |
3843 | else | |
3844 | mem_root = x; | |
3845 | ||
3846 | if (y != z) | |
3847 | { | |
3848 | z->start = y->start; | |
3849 | z->end = y->end; | |
3850 | z->type = y->type; | |
3851 | } | |
177c0ea7 | 3852 | |
34400008 GM |
3853 | if (y->color == MEM_BLACK) |
3854 | mem_delete_fixup (x); | |
877935b1 GM |
3855 | |
3856 | #ifdef GC_MALLOC_CHECK | |
3857 | _free_internal (y); | |
3858 | #else | |
34400008 | 3859 | xfree (y); |
877935b1 | 3860 | #endif |
34400008 GM |
3861 | } |
3862 | ||
3863 | ||
3864 | /* Re-establish the red-black properties of the tree, after a | |
3865 | deletion. */ | |
3866 | ||
3867 | static void | |
3868 | mem_delete_fixup (x) | |
3869 | struct mem_node *x; | |
3870 | { | |
3871 | while (x != mem_root && x->color == MEM_BLACK) | |
3872 | { | |
3873 | if (x == x->parent->left) | |
3874 | { | |
3875 | struct mem_node *w = x->parent->right; | |
177c0ea7 | 3876 | |
34400008 GM |
3877 | if (w->color == MEM_RED) |
3878 | { | |
3879 | w->color = MEM_BLACK; | |
3880 | x->parent->color = MEM_RED; | |
3881 | mem_rotate_left (x->parent); | |
3882 | w = x->parent->right; | |
3883 | } | |
177c0ea7 | 3884 | |
34400008 GM |
3885 | if (w->left->color == MEM_BLACK && w->right->color == MEM_BLACK) |
3886 | { | |
3887 | w->color = MEM_RED; | |
3888 | x = x->parent; | |
3889 | } | |
3890 | else | |
3891 | { | |
3892 | if (w->right->color == MEM_BLACK) | |
3893 | { | |
3894 | w->left->color = MEM_BLACK; | |
3895 | w->color = MEM_RED; | |
3896 | mem_rotate_right (w); | |
3897 | w = x->parent->right; | |
3898 | } | |
3899 | w->color = x->parent->color; | |
3900 | x->parent->color = MEM_BLACK; | |
3901 | w->right->color = MEM_BLACK; | |
3902 | mem_rotate_left (x->parent); | |
3903 | x = mem_root; | |
3904 | } | |
3905 | } | |
3906 | else | |
3907 | { | |
3908 | struct mem_node *w = x->parent->left; | |
177c0ea7 | 3909 | |
34400008 GM |
3910 | if (w->color == MEM_RED) |
3911 | { | |
3912 | w->color = MEM_BLACK; | |
3913 | x->parent->color = MEM_RED; | |
3914 | mem_rotate_right (x->parent); | |
3915 | w = x->parent->left; | |
3916 | } | |
177c0ea7 | 3917 | |
34400008 GM |
3918 | if (w->right->color == MEM_BLACK && w->left->color == MEM_BLACK) |
3919 | { | |
3920 | w->color = MEM_RED; | |
3921 | x = x->parent; | |
3922 | } | |
3923 | else | |
3924 | { | |
3925 | if (w->left->color == MEM_BLACK) | |
3926 | { | |
3927 | w->right->color = MEM_BLACK; | |
3928 | w->color = MEM_RED; | |
3929 | mem_rotate_left (w); | |
3930 | w = x->parent->left; | |
3931 | } | |
177c0ea7 | 3932 | |
34400008 GM |
3933 | w->color = x->parent->color; |
3934 | x->parent->color = MEM_BLACK; | |
3935 | w->left->color = MEM_BLACK; | |
3936 | mem_rotate_right (x->parent); | |
3937 | x = mem_root; | |
3938 | } | |
3939 | } | |
3940 | } | |
177c0ea7 | 3941 | |
34400008 GM |
3942 | x->color = MEM_BLACK; |
3943 | } | |
3944 | ||
3945 | ||
3946 | /* Value is non-zero if P is a pointer to a live Lisp string on | |
3947 | the heap. M is a pointer to the mem_block for P. */ | |
3948 | ||
3949 | static INLINE int | |
3950 | live_string_p (m, p) | |
3951 | struct mem_node *m; | |
3952 | void *p; | |
3953 | { | |
3954 | if (m->type == MEM_TYPE_STRING) | |
3955 | { | |
3956 | struct string_block *b = (struct string_block *) m->start; | |
3957 | int offset = (char *) p - (char *) &b->strings[0]; | |
3958 | ||
3959 | /* P must point to the start of a Lisp_String structure, and it | |
3960 | must not be on the free-list. */ | |
176bc847 GM |
3961 | return (offset >= 0 |
3962 | && offset % sizeof b->strings[0] == 0 | |
d05b383a | 3963 | && offset < (STRING_BLOCK_SIZE * sizeof b->strings[0]) |
34400008 GM |
3964 | && ((struct Lisp_String *) p)->data != NULL); |
3965 | } | |
3966 | else | |
3967 | return 0; | |
3968 | } | |
3969 | ||
3970 | ||
3971 | /* Value is non-zero if P is a pointer to a live Lisp cons on | |
3972 | the heap. M is a pointer to the mem_block for P. */ | |
3973 | ||
3974 | static INLINE int | |
3975 | live_cons_p (m, p) | |
3976 | struct mem_node *m; | |
3977 | void *p; | |
3978 | { | |
3979 | if (m->type == MEM_TYPE_CONS) | |
3980 | { | |
3981 | struct cons_block *b = (struct cons_block *) m->start; | |
3982 | int offset = (char *) p - (char *) &b->conses[0]; | |
3983 | ||
3984 | /* P must point to the start of a Lisp_Cons, not be | |
3985 | one of the unused cells in the current cons block, | |
3986 | and not be on the free-list. */ | |
176bc847 GM |
3987 | return (offset >= 0 |
3988 | && offset % sizeof b->conses[0] == 0 | |
d05b383a | 3989 | && offset < (CONS_BLOCK_SIZE * sizeof b->conses[0]) |
34400008 GM |
3990 | && (b != cons_block |
3991 | || offset / sizeof b->conses[0] < cons_block_index) | |
3992 | && !EQ (((struct Lisp_Cons *) p)->car, Vdead)); | |
3993 | } | |
3994 | else | |
3995 | return 0; | |
3996 | } | |
3997 | ||
3998 | ||
3999 | /* Value is non-zero if P is a pointer to a live Lisp symbol on | |
4000 | the heap. M is a pointer to the mem_block for P. */ | |
4001 | ||
4002 | static INLINE int | |
4003 | live_symbol_p (m, p) | |
4004 | struct mem_node *m; | |
4005 | void *p; | |
4006 | { | |
4007 | if (m->type == MEM_TYPE_SYMBOL) | |
4008 | { | |
4009 | struct symbol_block *b = (struct symbol_block *) m->start; | |
4010 | int offset = (char *) p - (char *) &b->symbols[0]; | |
177c0ea7 | 4011 | |
34400008 GM |
4012 | /* P must point to the start of a Lisp_Symbol, not be |
4013 | one of the unused cells in the current symbol block, | |
4014 | and not be on the free-list. */ | |
176bc847 GM |
4015 | return (offset >= 0 |
4016 | && offset % sizeof b->symbols[0] == 0 | |
d05b383a | 4017 | && offset < (SYMBOL_BLOCK_SIZE * sizeof b->symbols[0]) |
34400008 GM |
4018 | && (b != symbol_block |
4019 | || offset / sizeof b->symbols[0] < symbol_block_index) | |
4020 | && !EQ (((struct Lisp_Symbol *) p)->function, Vdead)); | |
4021 | } | |
4022 | else | |
4023 | return 0; | |
4024 | } | |
4025 | ||
4026 | ||
4027 | /* Value is non-zero if P is a pointer to a live Lisp float on | |
4028 | the heap. M is a pointer to the mem_block for P. */ | |
4029 | ||
4030 | static INLINE int | |
4031 | live_float_p (m, p) | |
4032 | struct mem_node *m; | |
4033 | void *p; | |
4034 | { | |
4035 | if (m->type == MEM_TYPE_FLOAT) | |
4036 | { | |
4037 | struct float_block *b = (struct float_block *) m->start; | |
4038 | int offset = (char *) p - (char *) &b->floats[0]; | |
177c0ea7 | 4039 | |
ab6780cd SM |
4040 | /* P must point to the start of a Lisp_Float and not be |
4041 | one of the unused cells in the current float block. */ | |
176bc847 GM |
4042 | return (offset >= 0 |
4043 | && offset % sizeof b->floats[0] == 0 | |
d05b383a | 4044 | && offset < (FLOAT_BLOCK_SIZE * sizeof b->floats[0]) |
34400008 | 4045 | && (b != float_block |
ab6780cd | 4046 | || offset / sizeof b->floats[0] < float_block_index)); |
34400008 GM |
4047 | } |
4048 | else | |
4049 | return 0; | |
4050 | } | |
4051 | ||
4052 | ||
4053 | /* Value is non-zero if P is a pointer to a live Lisp Misc on | |
4054 | the heap. M is a pointer to the mem_block for P. */ | |
4055 | ||
4056 | static INLINE int | |
4057 | live_misc_p (m, p) | |
4058 | struct mem_node *m; | |
4059 | void *p; | |
4060 | { | |
4061 | if (m->type == MEM_TYPE_MISC) | |
4062 | { | |
4063 | struct marker_block *b = (struct marker_block *) m->start; | |
4064 | int offset = (char *) p - (char *) &b->markers[0]; | |
177c0ea7 | 4065 | |
34400008 GM |
4066 | /* P must point to the start of a Lisp_Misc, not be |
4067 | one of the unused cells in the current misc block, | |
4068 | and not be on the free-list. */ | |
176bc847 GM |
4069 | return (offset >= 0 |
4070 | && offset % sizeof b->markers[0] == 0 | |
d05b383a | 4071 | && offset < (MARKER_BLOCK_SIZE * sizeof b->markers[0]) |
34400008 GM |
4072 | && (b != marker_block |
4073 | || offset / sizeof b->markers[0] < marker_block_index) | |
4074 | && ((union Lisp_Misc *) p)->u_marker.type != Lisp_Misc_Free); | |
4075 | } | |
4076 | else | |
4077 | return 0; | |
4078 | } | |
4079 | ||
4080 | ||
4081 | /* Value is non-zero if P is a pointer to a live vector-like object. | |
4082 | M is a pointer to the mem_block for P. */ | |
4083 | ||
4084 | static INLINE int | |
4085 | live_vector_p (m, p) | |
4086 | struct mem_node *m; | |
4087 | void *p; | |
4088 | { | |
ece93c02 GM |
4089 | return (p == m->start |
4090 | && m->type >= MEM_TYPE_VECTOR | |
4091 | && m->type <= MEM_TYPE_WINDOW); | |
34400008 GM |
4092 | } |
4093 | ||
4094 | ||
2336fe58 | 4095 | /* Value is non-zero if P is a pointer to a live buffer. M is a |
34400008 GM |
4096 | pointer to the mem_block for P. */ |
4097 | ||
4098 | static INLINE int | |
4099 | live_buffer_p (m, p) | |
4100 | struct mem_node *m; | |
4101 | void *p; | |
4102 | { | |
4103 | /* P must point to the start of the block, and the buffer | |
4104 | must not have been killed. */ | |
4105 | return (m->type == MEM_TYPE_BUFFER | |
4106 | && p == m->start | |
4107 | && !NILP (((struct buffer *) p)->name)); | |
4108 | } | |
4109 | ||
13c844fb GM |
4110 | #endif /* GC_MARK_STACK || defined GC_MALLOC_CHECK */ |
4111 | ||
4112 | #if GC_MARK_STACK | |
4113 | ||
34400008 GM |
4114 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
4115 | ||
4116 | /* Array of objects that are kept alive because the C stack contains | |
4117 | a pattern that looks like a reference to them . */ | |
4118 | ||
4119 | #define MAX_ZOMBIES 10 | |
4120 | static Lisp_Object zombies[MAX_ZOMBIES]; | |
4121 | ||
4122 | /* Number of zombie objects. */ | |
4123 | ||
4124 | static int nzombies; | |
4125 | ||
4126 | /* Number of garbage collections. */ | |
4127 | ||
4128 | static int ngcs; | |
4129 | ||
4130 | /* Average percentage of zombies per collection. */ | |
4131 | ||
4132 | static double avg_zombies; | |
4133 | ||
4134 | /* Max. number of live and zombie objects. */ | |
4135 | ||
4136 | static int max_live, max_zombies; | |
4137 | ||
4138 | /* Average number of live objects per GC. */ | |
4139 | ||
4140 | static double avg_live; | |
4141 | ||
4142 | DEFUN ("gc-status", Fgc_status, Sgc_status, 0, 0, "", | |
7ee72033 MB |
4143 | doc: /* Show information about live and zombie objects. */) |
4144 | () | |
34400008 | 4145 | { |
83fc9c63 DL |
4146 | Lisp_Object args[8], zombie_list = Qnil; |
4147 | int i; | |
4148 | for (i = 0; i < nzombies; i++) | |
4149 | zombie_list = Fcons (zombies[i], zombie_list); | |
4150 | args[0] = build_string ("%d GCs, avg live/zombies = %.2f/%.2f (%f%%), max %d/%d\nzombies: %S"); | |
34400008 GM |
4151 | args[1] = make_number (ngcs); |
4152 | args[2] = make_float (avg_live); | |
4153 | args[3] = make_float (avg_zombies); | |
4154 | args[4] = make_float (avg_zombies / avg_live / 100); | |
4155 | args[5] = make_number (max_live); | |
4156 | args[6] = make_number (max_zombies); | |
83fc9c63 DL |
4157 | args[7] = zombie_list; |
4158 | return Fmessage (8, args); | |
34400008 GM |
4159 | } |
4160 | ||
4161 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
4162 | ||
4163 | ||
182ff242 GM |
4164 | /* Mark OBJ if we can prove it's a Lisp_Object. */ |
4165 | ||
4166 | static INLINE void | |
4167 | mark_maybe_object (obj) | |
4168 | Lisp_Object obj; | |
4169 | { | |
4170 | void *po = (void *) XPNTR (obj); | |
4171 | struct mem_node *m = mem_find (po); | |
177c0ea7 | 4172 | |
182ff242 GM |
4173 | if (m != MEM_NIL) |
4174 | { | |
4175 | int mark_p = 0; | |
4176 | ||
4177 | switch (XGCTYPE (obj)) | |
4178 | { | |
4179 | case Lisp_String: | |
4180 | mark_p = (live_string_p (m, po) | |
4181 | && !STRING_MARKED_P ((struct Lisp_String *) po)); | |
4182 | break; | |
4183 | ||
4184 | case Lisp_Cons: | |
08b7c2cb | 4185 | mark_p = (live_cons_p (m, po) && !CONS_MARKED_P (XCONS (obj))); |
182ff242 GM |
4186 | break; |
4187 | ||
4188 | case Lisp_Symbol: | |
2336fe58 | 4189 | mark_p = (live_symbol_p (m, po) && !XSYMBOL (obj)->gcmarkbit); |
182ff242 GM |
4190 | break; |
4191 | ||
4192 | case Lisp_Float: | |
ab6780cd | 4193 | mark_p = (live_float_p (m, po) && !FLOAT_MARKED_P (XFLOAT (obj))); |
182ff242 GM |
4194 | break; |
4195 | ||
4196 | case Lisp_Vectorlike: | |
4197 | /* Note: can't check GC_BUFFERP before we know it's a | |
4198 | buffer because checking that dereferences the pointer | |
4199 | PO which might point anywhere. */ | |
4200 | if (live_vector_p (m, po)) | |
3ef06d12 | 4201 | mark_p = !GC_SUBRP (obj) && !VECTOR_MARKED_P (XVECTOR (obj)); |
182ff242 | 4202 | else if (live_buffer_p (m, po)) |
3ef06d12 | 4203 | mark_p = GC_BUFFERP (obj) && !VECTOR_MARKED_P (XBUFFER (obj)); |
182ff242 GM |
4204 | break; |
4205 | ||
4206 | case Lisp_Misc: | |
2336fe58 | 4207 | mark_p = (live_misc_p (m, po) && !XMARKER (obj)->gcmarkbit); |
182ff242 | 4208 | break; |
6bbd7a29 GM |
4209 | |
4210 | case Lisp_Int: | |
31d929e5 | 4211 | case Lisp_Type_Limit: |
6bbd7a29 | 4212 | break; |
182ff242 GM |
4213 | } |
4214 | ||
4215 | if (mark_p) | |
4216 | { | |
4217 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4218 | if (nzombies < MAX_ZOMBIES) | |
83fc9c63 | 4219 | zombies[nzombies] = obj; |
182ff242 GM |
4220 | ++nzombies; |
4221 | #endif | |
49723c04 | 4222 | mark_object (obj); |
182ff242 GM |
4223 | } |
4224 | } | |
4225 | } | |
ece93c02 GM |
4226 | |
4227 | ||
4228 | /* If P points to Lisp data, mark that as live if it isn't already | |
4229 | marked. */ | |
4230 | ||
4231 | static INLINE void | |
4232 | mark_maybe_pointer (p) | |
4233 | void *p; | |
4234 | { | |
4235 | struct mem_node *m; | |
4236 | ||
4237 | /* Quickly rule out some values which can't point to Lisp data. We | |
4238 | assume that Lisp data is aligned on even addresses. */ | |
4239 | if ((EMACS_INT) p & 1) | |
4240 | return; | |
177c0ea7 | 4241 | |
ece93c02 GM |
4242 | m = mem_find (p); |
4243 | if (m != MEM_NIL) | |
4244 | { | |
4245 | Lisp_Object obj = Qnil; | |
177c0ea7 | 4246 | |
ece93c02 GM |
4247 | switch (m->type) |
4248 | { | |
4249 | case MEM_TYPE_NON_LISP: | |
2fe50224 | 4250 | /* Nothing to do; not a pointer to Lisp memory. */ |
ece93c02 | 4251 | break; |
177c0ea7 | 4252 | |
ece93c02 | 4253 | case MEM_TYPE_BUFFER: |
3ef06d12 | 4254 | if (live_buffer_p (m, p) && !VECTOR_MARKED_P((struct buffer *)p)) |
ece93c02 GM |
4255 | XSETVECTOR (obj, p); |
4256 | break; | |
177c0ea7 | 4257 | |
ece93c02 | 4258 | case MEM_TYPE_CONS: |
08b7c2cb | 4259 | if (live_cons_p (m, p) && !CONS_MARKED_P ((struct Lisp_Cons *) p)) |
ece93c02 GM |
4260 | XSETCONS (obj, p); |
4261 | break; | |
177c0ea7 | 4262 | |
ece93c02 GM |
4263 | case MEM_TYPE_STRING: |
4264 | if (live_string_p (m, p) | |
4265 | && !STRING_MARKED_P ((struct Lisp_String *) p)) | |
4266 | XSETSTRING (obj, p); | |
4267 | break; | |
4268 | ||
4269 | case MEM_TYPE_MISC: | |
2336fe58 SM |
4270 | if (live_misc_p (m, p) && !((struct Lisp_Free *) p)->gcmarkbit) |
4271 | XSETMISC (obj, p); | |
ece93c02 | 4272 | break; |
177c0ea7 | 4273 | |
ece93c02 | 4274 | case MEM_TYPE_SYMBOL: |
2336fe58 | 4275 | if (live_symbol_p (m, p) && !((struct Lisp_Symbol *) p)->gcmarkbit) |
ece93c02 GM |
4276 | XSETSYMBOL (obj, p); |
4277 | break; | |
177c0ea7 | 4278 | |
ece93c02 | 4279 | case MEM_TYPE_FLOAT: |
ab6780cd | 4280 | if (live_float_p (m, p) && !FLOAT_MARKED_P (p)) |
ece93c02 GM |
4281 | XSETFLOAT (obj, p); |
4282 | break; | |
177c0ea7 | 4283 | |
ece93c02 GM |
4284 | case MEM_TYPE_VECTOR: |
4285 | case MEM_TYPE_PROCESS: | |
4286 | case MEM_TYPE_HASH_TABLE: | |
4287 | case MEM_TYPE_FRAME: | |
4288 | case MEM_TYPE_WINDOW: | |
4289 | if (live_vector_p (m, p)) | |
4290 | { | |
4291 | Lisp_Object tem; | |
4292 | XSETVECTOR (tem, p); | |
3ef06d12 | 4293 | if (!GC_SUBRP (tem) && !VECTOR_MARKED_P (XVECTOR (tem))) |
ece93c02 GM |
4294 | obj = tem; |
4295 | } | |
4296 | break; | |
4297 | ||
4298 | default: | |
4299 | abort (); | |
4300 | } | |
4301 | ||
4302 | if (!GC_NILP (obj)) | |
49723c04 | 4303 | mark_object (obj); |
ece93c02 GM |
4304 | } |
4305 | } | |
4306 | ||
4307 | ||
4308 | /* Mark Lisp objects referenced from the address range START..END. */ | |
34400008 | 4309 | |
177c0ea7 | 4310 | static void |
34400008 GM |
4311 | mark_memory (start, end) |
4312 | void *start, *end; | |
4313 | { | |
4314 | Lisp_Object *p; | |
ece93c02 | 4315 | void **pp; |
34400008 GM |
4316 | |
4317 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4318 | nzombies = 0; | |
4319 | #endif | |
4320 | ||
4321 | /* Make START the pointer to the start of the memory region, | |
4322 | if it isn't already. */ | |
4323 | if (end < start) | |
4324 | { | |
4325 | void *tem = start; | |
4326 | start = end; | |
4327 | end = tem; | |
4328 | } | |
ece93c02 GM |
4329 | |
4330 | /* Mark Lisp_Objects. */ | |
34400008 | 4331 | for (p = (Lisp_Object *) start; (void *) p < end; ++p) |
182ff242 | 4332 | mark_maybe_object (*p); |
ece93c02 GM |
4333 | |
4334 | /* Mark Lisp data pointed to. This is necessary because, in some | |
4335 | situations, the C compiler optimizes Lisp objects away, so that | |
4336 | only a pointer to them remains. Example: | |
4337 | ||
4338 | DEFUN ("testme", Ftestme, Stestme, 0, 0, 0, "") | |
7ee72033 | 4339 | () |
ece93c02 GM |
4340 | { |
4341 | Lisp_Object obj = build_string ("test"); | |
4342 | struct Lisp_String *s = XSTRING (obj); | |
4343 | Fgarbage_collect (); | |
4344 | fprintf (stderr, "test `%s'\n", s->data); | |
4345 | return Qnil; | |
4346 | } | |
4347 | ||
4348 | Here, `obj' isn't really used, and the compiler optimizes it | |
4349 | away. The only reference to the life string is through the | |
4350 | pointer `s'. */ | |
177c0ea7 | 4351 | |
ece93c02 GM |
4352 | for (pp = (void **) start; (void *) pp < end; ++pp) |
4353 | mark_maybe_pointer (*pp); | |
182ff242 GM |
4354 | } |
4355 | ||
30f637f8 DL |
4356 | /* setjmp will work with GCC unless NON_SAVING_SETJMP is defined in |
4357 | the GCC system configuration. In gcc 3.2, the only systems for | |
4358 | which this is so are i386-sco5 non-ELF, i386-sysv3 (maybe included | |
4359 | by others?) and ns32k-pc532-min. */ | |
182ff242 GM |
4360 | |
4361 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
4362 | ||
4363 | static int setjmp_tested_p, longjmps_done; | |
4364 | ||
4365 | #define SETJMP_WILL_LIKELY_WORK "\ | |
4366 | \n\ | |
4367 | Emacs garbage collector has been changed to use conservative stack\n\ | |
4368 | marking. Emacs has determined that the method it uses to do the\n\ | |
4369 | marking will likely work on your system, but this isn't sure.\n\ | |
4370 | \n\ | |
4371 | If you are a system-programmer, or can get the help of a local wizard\n\ | |
4372 | who is, please take a look at the function mark_stack in alloc.c, and\n\ | |
4373 | verify that the methods used are appropriate for your system.\n\ | |
4374 | \n\ | |
d191623b | 4375 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
4376 | " |
4377 | ||
4378 | #define SETJMP_WILL_NOT_WORK "\ | |
4379 | \n\ | |
4380 | Emacs garbage collector has been changed to use conservative stack\n\ | |
4381 | marking. Emacs has determined that the default method it uses to do the\n\ | |
4382 | marking will not work on your system. We will need a system-dependent\n\ | |
4383 | solution for your system.\n\ | |
4384 | \n\ | |
4385 | Please take a look at the function mark_stack in alloc.c, and\n\ | |
4386 | try to find a way to make it work on your system.\n\ | |
30f637f8 DL |
4387 | \n\ |
4388 | Note that you may get false negatives, depending on the compiler.\n\ | |
4389 | In particular, you need to use -O with GCC for this test.\n\ | |
4390 | \n\ | |
d191623b | 4391 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
4392 | " |
4393 | ||
4394 | ||
4395 | /* Perform a quick check if it looks like setjmp saves registers in a | |
4396 | jmp_buf. Print a message to stderr saying so. When this test | |
4397 | succeeds, this is _not_ a proof that setjmp is sufficient for | |
4398 | conservative stack marking. Only the sources or a disassembly | |
4399 | can prove that. */ | |
4400 | ||
4401 | static void | |
4402 | test_setjmp () | |
4403 | { | |
4404 | char buf[10]; | |
4405 | register int x; | |
4406 | jmp_buf jbuf; | |
4407 | int result = 0; | |
4408 | ||
4409 | /* Arrange for X to be put in a register. */ | |
4410 | sprintf (buf, "1"); | |
4411 | x = strlen (buf); | |
4412 | x = 2 * x - 1; | |
4413 | ||
4414 | setjmp (jbuf); | |
4415 | if (longjmps_done == 1) | |
34400008 | 4416 | { |
182ff242 | 4417 | /* Came here after the longjmp at the end of the function. |
34400008 | 4418 | |
182ff242 GM |
4419 | If x == 1, the longjmp has restored the register to its |
4420 | value before the setjmp, and we can hope that setjmp | |
4421 | saves all such registers in the jmp_buf, although that | |
4422 | isn't sure. | |
34400008 | 4423 | |
182ff242 GM |
4424 | For other values of X, either something really strange is |
4425 | taking place, or the setjmp just didn't save the register. */ | |
4426 | ||
4427 | if (x == 1) | |
4428 | fprintf (stderr, SETJMP_WILL_LIKELY_WORK); | |
4429 | else | |
4430 | { | |
4431 | fprintf (stderr, SETJMP_WILL_NOT_WORK); | |
4432 | exit (1); | |
34400008 GM |
4433 | } |
4434 | } | |
182ff242 GM |
4435 | |
4436 | ++longjmps_done; | |
4437 | x = 2; | |
4438 | if (longjmps_done == 1) | |
4439 | longjmp (jbuf, 1); | |
34400008 GM |
4440 | } |
4441 | ||
182ff242 GM |
4442 | #endif /* not GC_SAVE_REGISTERS_ON_STACK && not GC_SETJMP_WORKS */ |
4443 | ||
34400008 GM |
4444 | |
4445 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
4446 | ||
4447 | /* Abort if anything GCPRO'd doesn't survive the GC. */ | |
4448 | ||
4449 | static void | |
4450 | check_gcpros () | |
4451 | { | |
4452 | struct gcpro *p; | |
4453 | int i; | |
4454 | ||
4455 | for (p = gcprolist; p; p = p->next) | |
4456 | for (i = 0; i < p->nvars; ++i) | |
4457 | if (!survives_gc_p (p->var[i])) | |
92cc28b2 SM |
4458 | /* FIXME: It's not necessarily a bug. It might just be that the |
4459 | GCPRO is unnecessary or should release the object sooner. */ | |
34400008 GM |
4460 | abort (); |
4461 | } | |
4462 | ||
4463 | #elif GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4464 | ||
4465 | static void | |
4466 | dump_zombies () | |
4467 | { | |
4468 | int i; | |
4469 | ||
4470 | fprintf (stderr, "\nZombies kept alive = %d:\n", nzombies); | |
4471 | for (i = 0; i < min (MAX_ZOMBIES, nzombies); ++i) | |
4472 | { | |
4473 | fprintf (stderr, " %d = ", i); | |
4474 | debug_print (zombies[i]); | |
4475 | } | |
4476 | } | |
4477 | ||
4478 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
4479 | ||
4480 | ||
182ff242 GM |
4481 | /* Mark live Lisp objects on the C stack. |
4482 | ||
4483 | There are several system-dependent problems to consider when | |
4484 | porting this to new architectures: | |
4485 | ||
4486 | Processor Registers | |
4487 | ||
4488 | We have to mark Lisp objects in CPU registers that can hold local | |
4489 | variables or are used to pass parameters. | |
4490 | ||
4491 | If GC_SAVE_REGISTERS_ON_STACK is defined, it should expand to | |
4492 | something that either saves relevant registers on the stack, or | |
4493 | calls mark_maybe_object passing it each register's contents. | |
4494 | ||
4495 | If GC_SAVE_REGISTERS_ON_STACK is not defined, the current | |
4496 | implementation assumes that calling setjmp saves registers we need | |
4497 | to see in a jmp_buf which itself lies on the stack. This doesn't | |
4498 | have to be true! It must be verified for each system, possibly | |
4499 | by taking a look at the source code of setjmp. | |
4500 | ||
4501 | Stack Layout | |
4502 | ||
4503 | Architectures differ in the way their processor stack is organized. | |
4504 | For example, the stack might look like this | |
4505 | ||
4506 | +----------------+ | |
4507 | | Lisp_Object | size = 4 | |
4508 | +----------------+ | |
4509 | | something else | size = 2 | |
4510 | +----------------+ | |
4511 | | Lisp_Object | size = 4 | |
4512 | +----------------+ | |
4513 | | ... | | |
4514 | ||
4515 | In such a case, not every Lisp_Object will be aligned equally. To | |
4516 | find all Lisp_Object on the stack it won't be sufficient to walk | |
4517 | the stack in steps of 4 bytes. Instead, two passes will be | |
4518 | necessary, one starting at the start of the stack, and a second | |
4519 | pass starting at the start of the stack + 2. Likewise, if the | |
4520 | minimal alignment of Lisp_Objects on the stack is 1, four passes | |
4521 | would be necessary, each one starting with one byte more offset | |
4522 | from the stack start. | |
4523 | ||
4524 | The current code assumes by default that Lisp_Objects are aligned | |
4525 | equally on the stack. */ | |
34400008 GM |
4526 | |
4527 | static void | |
4528 | mark_stack () | |
4529 | { | |
630909a5 | 4530 | int i; |
34400008 | 4531 | jmp_buf j; |
6bbd7a29 | 4532 | volatile int stack_grows_down_p = (char *) &j > (char *) stack_base; |
34400008 GM |
4533 | void *end; |
4534 | ||
4535 | /* This trick flushes the register windows so that all the state of | |
4536 | the process is contained in the stack. */ | |
ab6780cd | 4537 | /* Fixme: Code in the Boehm GC suggests flushing (with `flushrs') is |
422eec7e DL |
4538 | needed on ia64 too. See mach_dep.c, where it also says inline |
4539 | assembler doesn't work with relevant proprietary compilers. */ | |
34400008 GM |
4540 | #ifdef sparc |
4541 | asm ("ta 3"); | |
4542 | #endif | |
177c0ea7 | 4543 | |
34400008 GM |
4544 | /* Save registers that we need to see on the stack. We need to see |
4545 | registers used to hold register variables and registers used to | |
4546 | pass parameters. */ | |
4547 | #ifdef GC_SAVE_REGISTERS_ON_STACK | |
4548 | GC_SAVE_REGISTERS_ON_STACK (end); | |
182ff242 | 4549 | #else /* not GC_SAVE_REGISTERS_ON_STACK */ |
177c0ea7 | 4550 | |
182ff242 GM |
4551 | #ifndef GC_SETJMP_WORKS /* If it hasn't been checked yet that |
4552 | setjmp will definitely work, test it | |
4553 | and print a message with the result | |
4554 | of the test. */ | |
4555 | if (!setjmp_tested_p) | |
4556 | { | |
4557 | setjmp_tested_p = 1; | |
4558 | test_setjmp (); | |
4559 | } | |
4560 | #endif /* GC_SETJMP_WORKS */ | |
177c0ea7 | 4561 | |
34400008 GM |
4562 | setjmp (j); |
4563 | end = stack_grows_down_p ? (char *) &j + sizeof j : (char *) &j; | |
182ff242 | 4564 | #endif /* not GC_SAVE_REGISTERS_ON_STACK */ |
34400008 GM |
4565 | |
4566 | /* This assumes that the stack is a contiguous region in memory. If | |
182ff242 GM |
4567 | that's not the case, something has to be done here to iterate |
4568 | over the stack segments. */ | |
630909a5 | 4569 | #ifndef GC_LISP_OBJECT_ALIGNMENT |
422eec7e DL |
4570 | #ifdef __GNUC__ |
4571 | #define GC_LISP_OBJECT_ALIGNMENT __alignof__ (Lisp_Object) | |
4572 | #else | |
630909a5 | 4573 | #define GC_LISP_OBJECT_ALIGNMENT sizeof (Lisp_Object) |
422eec7e | 4574 | #endif |
182ff242 | 4575 | #endif |
24452cd5 | 4576 | for (i = 0; i < sizeof (Lisp_Object); i += GC_LISP_OBJECT_ALIGNMENT) |
630909a5 | 4577 | mark_memory ((char *) stack_base + i, end); |
4dec23ff AS |
4578 | /* Allow for marking a secondary stack, like the register stack on the |
4579 | ia64. */ | |
4580 | #ifdef GC_MARK_SECONDARY_STACK | |
4581 | GC_MARK_SECONDARY_STACK (); | |
4582 | #endif | |
34400008 GM |
4583 | |
4584 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
4585 | check_gcpros (); | |
4586 | #endif | |
4587 | } | |
4588 | ||
34400008 GM |
4589 | #endif /* GC_MARK_STACK != 0 */ |
4590 | ||
4591 | ||
3cd55735 KS |
4592 | |
4593 | /* Return 1 if OBJ is a valid lisp object. | |
4594 | Return 0 if OBJ is NOT a valid lisp object. | |
4595 | Return -1 if we cannot validate OBJ. | |
7c0ab7d9 RS |
4596 | This function can be quite slow, |
4597 | so it should only be used in code for manual debugging. */ | |
3cd55735 KS |
4598 | |
4599 | int | |
4600 | valid_lisp_object_p (obj) | |
4601 | Lisp_Object obj; | |
4602 | { | |
de7124a7 | 4603 | void *p; |
3cd55735 | 4604 | #if !GC_MARK_STACK |
de7124a7 | 4605 | int fd; |
3cd55735 | 4606 | #else |
3cd55735 | 4607 | struct mem_node *m; |
de7124a7 | 4608 | #endif |
3cd55735 KS |
4609 | |
4610 | if (INTEGERP (obj)) | |
4611 | return 1; | |
4612 | ||
4613 | p = (void *) XPNTR (obj); | |
3cd55735 KS |
4614 | if (PURE_POINTER_P (p)) |
4615 | return 1; | |
4616 | ||
de7124a7 KS |
4617 | #if !GC_MARK_STACK |
4618 | /* We need to determine whether it is safe to access memory at | |
4619 | address P. Obviously, we cannot just access it (we would SEGV | |
4620 | trying), so we trick the o/s to tell us whether p is a valid | |
4621 | pointer. Unfortunately, we cannot use NULL_DEVICE here, as | |
4622 | emacs_write may not validate p in that case. */ | |
7c0ab7d9 | 4623 | if ((fd = emacs_open ("__Valid__Lisp__Object__", O_CREAT | O_WRONLY | O_TRUNC, 0666)) >= 0) |
de7124a7 | 4624 | { |
7c0ab7d9 RS |
4625 | int valid = (emacs_write (fd, (char *)p, 16) == 16); |
4626 | emacs_close (fd); | |
4627 | unlink ("__Valid__Lisp__Object__"); | |
de7124a7 KS |
4628 | return valid; |
4629 | } | |
4630 | ||
4631 | return -1; | |
4632 | #else | |
4633 | ||
3cd55735 KS |
4634 | m = mem_find (p); |
4635 | ||
4636 | if (m == MEM_NIL) | |
4637 | return 0; | |
4638 | ||
4639 | switch (m->type) | |
4640 | { | |
4641 | case MEM_TYPE_NON_LISP: | |
4642 | return 0; | |
4643 | ||
4644 | case MEM_TYPE_BUFFER: | |
4645 | return live_buffer_p (m, p); | |
4646 | ||
4647 | case MEM_TYPE_CONS: | |
4648 | return live_cons_p (m, p); | |
4649 | ||
4650 | case MEM_TYPE_STRING: | |
4651 | return live_string_p (m, p); | |
4652 | ||
4653 | case MEM_TYPE_MISC: | |
4654 | return live_misc_p (m, p); | |
4655 | ||
4656 | case MEM_TYPE_SYMBOL: | |
4657 | return live_symbol_p (m, p); | |
4658 | ||
4659 | case MEM_TYPE_FLOAT: | |
4660 | return live_float_p (m, p); | |
4661 | ||
4662 | case MEM_TYPE_VECTOR: | |
4663 | case MEM_TYPE_PROCESS: | |
4664 | case MEM_TYPE_HASH_TABLE: | |
4665 | case MEM_TYPE_FRAME: | |
4666 | case MEM_TYPE_WINDOW: | |
4667 | return live_vector_p (m, p); | |
4668 | ||
4669 | default: | |
4670 | break; | |
4671 | } | |
4672 | ||
4673 | return 0; | |
4674 | #endif | |
4675 | } | |
4676 | ||
4677 | ||
4678 | ||
34400008 | 4679 | \f |
2e471eb5 GM |
4680 | /*********************************************************************** |
4681 | Pure Storage Management | |
4682 | ***********************************************************************/ | |
4683 | ||
1f0b3fd2 GM |
4684 | /* Allocate room for SIZE bytes from pure Lisp storage and return a |
4685 | pointer to it. TYPE is the Lisp type for which the memory is | |
4686 | allocated. TYPE < 0 means it's not used for a Lisp object. | |
4687 | ||
4688 | If store_pure_type_info is set and TYPE is >= 0, the type of | |
4689 | the allocated object is recorded in pure_types. */ | |
4690 | ||
4691 | static POINTER_TYPE * | |
4692 | pure_alloc (size, type) | |
4693 | size_t size; | |
4694 | int type; | |
4695 | { | |
1f0b3fd2 | 4696 | POINTER_TYPE *result; |
831b476c SM |
4697 | #ifdef USE_LSB_TAG |
4698 | size_t alignment = (1 << GCTYPEBITS); | |
4699 | #else | |
44117420 | 4700 | size_t alignment = sizeof (EMACS_INT); |
1f0b3fd2 GM |
4701 | |
4702 | /* Give Lisp_Floats an extra alignment. */ | |
4703 | if (type == Lisp_Float) | |
4704 | { | |
1f0b3fd2 GM |
4705 | #if defined __GNUC__ && __GNUC__ >= 2 |
4706 | alignment = __alignof (struct Lisp_Float); | |
4707 | #else | |
4708 | alignment = sizeof (struct Lisp_Float); | |
4709 | #endif | |
9e713715 | 4710 | } |
831b476c | 4711 | #endif |
1f0b3fd2 | 4712 | |
44117420 | 4713 | again: |
ab6780cd | 4714 | result = ALIGN (purebeg + pure_bytes_used, alignment); |
44117420 KS |
4715 | pure_bytes_used = ((char *)result - (char *)purebeg) + size; |
4716 | ||
4717 | if (pure_bytes_used <= pure_size) | |
4718 | return result; | |
4719 | ||
4720 | /* Don't allocate a large amount here, | |
4721 | because it might get mmap'd and then its address | |
4722 | might not be usable. */ | |
4723 | purebeg = (char *) xmalloc (10000); | |
4724 | pure_size = 10000; | |
4725 | pure_bytes_used_before_overflow += pure_bytes_used - size; | |
4726 | pure_bytes_used = 0; | |
4727 | goto again; | |
1f0b3fd2 GM |
4728 | } |
4729 | ||
4730 | ||
852f8cdc | 4731 | /* Print a warning if PURESIZE is too small. */ |
9e713715 GM |
4732 | |
4733 | void | |
4734 | check_pure_size () | |
4735 | { | |
4736 | if (pure_bytes_used_before_overflow) | |
2aee5ca3 | 4737 | message ("emacs:0:Pure Lisp storage overflow (approx. %d bytes needed)", |
a4d35afd | 4738 | (int) (pure_bytes_used + pure_bytes_used_before_overflow)); |
9e713715 GM |
4739 | } |
4740 | ||
4741 | ||
2e471eb5 GM |
4742 | /* Return a string allocated in pure space. DATA is a buffer holding |
4743 | NCHARS characters, and NBYTES bytes of string data. MULTIBYTE | |
4744 | non-zero means make the result string multibyte. | |
1a4f1e2c | 4745 | |
2e471eb5 GM |
4746 | Must get an error if pure storage is full, since if it cannot hold |
4747 | a large string it may be able to hold conses that point to that | |
4748 | string; then the string is not protected from gc. */ | |
7146af97 JB |
4749 | |
4750 | Lisp_Object | |
2e471eb5 | 4751 | make_pure_string (data, nchars, nbytes, multibyte) |
7146af97 | 4752 | char *data; |
2e471eb5 | 4753 | int nchars, nbytes; |
c0696668 | 4754 | int multibyte; |
7146af97 | 4755 | { |
2e471eb5 GM |
4756 | Lisp_Object string; |
4757 | struct Lisp_String *s; | |
c0696668 | 4758 | |
1f0b3fd2 GM |
4759 | s = (struct Lisp_String *) pure_alloc (sizeof *s, Lisp_String); |
4760 | s->data = (unsigned char *) pure_alloc (nbytes + 1, -1); | |
2e471eb5 GM |
4761 | s->size = nchars; |
4762 | s->size_byte = multibyte ? nbytes : -1; | |
4763 | bcopy (data, s->data, nbytes); | |
4764 | s->data[nbytes] = '\0'; | |
4765 | s->intervals = NULL_INTERVAL; | |
2e471eb5 GM |
4766 | XSETSTRING (string, s); |
4767 | return string; | |
7146af97 JB |
4768 | } |
4769 | ||
2e471eb5 | 4770 | |
34400008 GM |
4771 | /* Return a cons allocated from pure space. Give it pure copies |
4772 | of CAR as car and CDR as cdr. */ | |
4773 | ||
7146af97 JB |
4774 | Lisp_Object |
4775 | pure_cons (car, cdr) | |
4776 | Lisp_Object car, cdr; | |
4777 | { | |
4778 | register Lisp_Object new; | |
1f0b3fd2 | 4779 | struct Lisp_Cons *p; |
7146af97 | 4780 | |
1f0b3fd2 GM |
4781 | p = (struct Lisp_Cons *) pure_alloc (sizeof *p, Lisp_Cons); |
4782 | XSETCONS (new, p); | |
f3fbd155 KR |
4783 | XSETCAR (new, Fpurecopy (car)); |
4784 | XSETCDR (new, Fpurecopy (cdr)); | |
7146af97 JB |
4785 | return new; |
4786 | } | |
4787 | ||
7146af97 | 4788 | |
34400008 GM |
4789 | /* Value is a float object with value NUM allocated from pure space. */ |
4790 | ||
7146af97 JB |
4791 | Lisp_Object |
4792 | make_pure_float (num) | |
4793 | double num; | |
4794 | { | |
4795 | register Lisp_Object new; | |
1f0b3fd2 | 4796 | struct Lisp_Float *p; |
7146af97 | 4797 | |
1f0b3fd2 GM |
4798 | p = (struct Lisp_Float *) pure_alloc (sizeof *p, Lisp_Float); |
4799 | XSETFLOAT (new, p); | |
70949dac | 4800 | XFLOAT_DATA (new) = num; |
7146af97 JB |
4801 | return new; |
4802 | } | |
4803 | ||
34400008 GM |
4804 | |
4805 | /* Return a vector with room for LEN Lisp_Objects allocated from | |
4806 | pure space. */ | |
4807 | ||
7146af97 JB |
4808 | Lisp_Object |
4809 | make_pure_vector (len) | |
42607681 | 4810 | EMACS_INT len; |
7146af97 | 4811 | { |
1f0b3fd2 GM |
4812 | Lisp_Object new; |
4813 | struct Lisp_Vector *p; | |
4814 | size_t size = sizeof *p + (len - 1) * sizeof (Lisp_Object); | |
7146af97 | 4815 | |
1f0b3fd2 GM |
4816 | p = (struct Lisp_Vector *) pure_alloc (size, Lisp_Vectorlike); |
4817 | XSETVECTOR (new, p); | |
7146af97 JB |
4818 | XVECTOR (new)->size = len; |
4819 | return new; | |
4820 | } | |
4821 | ||
34400008 | 4822 | |
7146af97 | 4823 | DEFUN ("purecopy", Fpurecopy, Spurecopy, 1, 1, 0, |
909e3b33 | 4824 | doc: /* Make a copy of object OBJ in pure storage. |
228299fa | 4825 | Recursively copies contents of vectors and cons cells. |
7ee72033 MB |
4826 | Does not copy symbols. Copies strings without text properties. */) |
4827 | (obj) | |
7146af97 JB |
4828 | register Lisp_Object obj; |
4829 | { | |
265a9e55 | 4830 | if (NILP (Vpurify_flag)) |
7146af97 JB |
4831 | return obj; |
4832 | ||
1f0b3fd2 | 4833 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
4834 | return obj; |
4835 | ||
d6dd74bb | 4836 | if (CONSP (obj)) |
70949dac | 4837 | return pure_cons (XCAR (obj), XCDR (obj)); |
d6dd74bb | 4838 | else if (FLOATP (obj)) |
70949dac | 4839 | return make_pure_float (XFLOAT_DATA (obj)); |
d6dd74bb | 4840 | else if (STRINGP (obj)) |
d5db4077 KR |
4841 | return make_pure_string (SDATA (obj), SCHARS (obj), |
4842 | SBYTES (obj), | |
c0696668 | 4843 | STRING_MULTIBYTE (obj)); |
d6dd74bb KH |
4844 | else if (COMPILEDP (obj) || VECTORP (obj)) |
4845 | { | |
4846 | register struct Lisp_Vector *vec; | |
41b867ea AS |
4847 | register int i; |
4848 | EMACS_INT size; | |
d6dd74bb KH |
4849 | |
4850 | size = XVECTOR (obj)->size; | |
7d535c68 KH |
4851 | if (size & PSEUDOVECTOR_FLAG) |
4852 | size &= PSEUDOVECTOR_SIZE_MASK; | |
41b867ea | 4853 | vec = XVECTOR (make_pure_vector (size)); |
d6dd74bb KH |
4854 | for (i = 0; i < size; i++) |
4855 | vec->contents[i] = Fpurecopy (XVECTOR (obj)->contents[i]); | |
4856 | if (COMPILEDP (obj)) | |
4857 | XSETCOMPILED (obj, vec); | |
4858 | else | |
4859 | XSETVECTOR (obj, vec); | |
7146af97 JB |
4860 | return obj; |
4861 | } | |
d6dd74bb KH |
4862 | else if (MARKERP (obj)) |
4863 | error ("Attempt to copy a marker to pure storage"); | |
6bbd7a29 GM |
4864 | |
4865 | return obj; | |
7146af97 | 4866 | } |
2e471eb5 | 4867 | |
34400008 | 4868 | |
7146af97 | 4869 | \f |
34400008 GM |
4870 | /*********************************************************************** |
4871 | Protection from GC | |
4872 | ***********************************************************************/ | |
4873 | ||
2e471eb5 GM |
4874 | /* Put an entry in staticvec, pointing at the variable with address |
4875 | VARADDRESS. */ | |
7146af97 JB |
4876 | |
4877 | void | |
4878 | staticpro (varaddress) | |
4879 | Lisp_Object *varaddress; | |
4880 | { | |
4881 | staticvec[staticidx++] = varaddress; | |
4882 | if (staticidx >= NSTATICS) | |
4883 | abort (); | |
4884 | } | |
4885 | ||
4886 | struct catchtag | |
2e471eb5 | 4887 | { |
7146af97 JB |
4888 | Lisp_Object tag; |
4889 | Lisp_Object val; | |
4890 | struct catchtag *next; | |
2e471eb5 | 4891 | }; |
7146af97 | 4892 | |
7146af97 | 4893 | \f |
34400008 GM |
4894 | /*********************************************************************** |
4895 | Protection from GC | |
4896 | ***********************************************************************/ | |
1a4f1e2c | 4897 | |
e8197642 RS |
4898 | /* Temporarily prevent garbage collection. */ |
4899 | ||
4900 | int | |
4901 | inhibit_garbage_collection () | |
4902 | { | |
aed13378 | 4903 | int count = SPECPDL_INDEX (); |
54defd0d AS |
4904 | int nbits = min (VALBITS, BITS_PER_INT); |
4905 | ||
4906 | specbind (Qgc_cons_threshold, make_number (((EMACS_INT) 1 << (nbits - 1)) - 1)); | |
e8197642 RS |
4907 | return count; |
4908 | } | |
4909 | ||
34400008 | 4910 | |
7146af97 | 4911 | DEFUN ("garbage-collect", Fgarbage_collect, Sgarbage_collect, 0, 0, "", |
7ee72033 | 4912 | doc: /* Reclaim storage for Lisp objects no longer needed. |
e1e37596 RS |
4913 | Garbage collection happens automatically if you cons more than |
4914 | `gc-cons-threshold' bytes of Lisp data since previous garbage collection. | |
4915 | `garbage-collect' normally returns a list with info on amount of space in use: | |
228299fa GM |
4916 | ((USED-CONSES . FREE-CONSES) (USED-SYMS . FREE-SYMS) |
4917 | (USED-MARKERS . FREE-MARKERS) USED-STRING-CHARS USED-VECTOR-SLOTS | |
4918 | (USED-FLOATS . FREE-FLOATS) (USED-INTERVALS . FREE-INTERVALS) | |
4919 | (USED-STRINGS . FREE-STRINGS)) | |
e1e37596 RS |
4920 | However, if there was overflow in pure space, `garbage-collect' |
4921 | returns nil, because real GC can't be done. */) | |
7ee72033 | 4922 | () |
7146af97 | 4923 | { |
7146af97 JB |
4924 | register struct specbinding *bind; |
4925 | struct catchtag *catch; | |
4926 | struct handler *handler; | |
7146af97 JB |
4927 | char stack_top_variable; |
4928 | register int i; | |
6efc7df7 | 4929 | int message_p; |
96117bc7 | 4930 | Lisp_Object total[8]; |
331379bf | 4931 | int count = SPECPDL_INDEX (); |
2c5bd608 DL |
4932 | EMACS_TIME t1, t2, t3; |
4933 | ||
3de0effb RS |
4934 | if (abort_on_gc) |
4935 | abort (); | |
4936 | ||
9e713715 GM |
4937 | /* Can't GC if pure storage overflowed because we can't determine |
4938 | if something is a pure object or not. */ | |
4939 | if (pure_bytes_used_before_overflow) | |
4940 | return Qnil; | |
4941 | ||
bbc012e0 KS |
4942 | CHECK_CONS_LIST (); |
4943 | ||
3c7e66a8 RS |
4944 | /* Don't keep undo information around forever. |
4945 | Do this early on, so it is no problem if the user quits. */ | |
4946 | { | |
4947 | register struct buffer *nextb = all_buffers; | |
4948 | ||
4949 | while (nextb) | |
4950 | { | |
4951 | /* If a buffer's undo list is Qt, that means that undo is | |
4952 | turned off in that buffer. Calling truncate_undo_list on | |
4953 | Qt tends to return NULL, which effectively turns undo back on. | |
4954 | So don't call truncate_undo_list if undo_list is Qt. */ | |
303b0412 | 4955 | if (! NILP (nextb->name) && ! EQ (nextb->undo_list, Qt)) |
3c7e66a8 RS |
4956 | truncate_undo_list (nextb); |
4957 | ||
4958 | /* Shrink buffer gaps, but skip indirect and dead buffers. */ | |
4959 | if (nextb->base_buffer == 0 && !NILP (nextb->name)) | |
4960 | { | |
4961 | /* If a buffer's gap size is more than 10% of the buffer | |
4962 | size, or larger than 2000 bytes, then shrink it | |
4963 | accordingly. Keep a minimum size of 20 bytes. */ | |
4964 | int size = min (2000, max (20, (nextb->text->z_byte / 10))); | |
4965 | ||
4966 | if (nextb->text->gap_size > size) | |
4967 | { | |
4968 | struct buffer *save_current = current_buffer; | |
4969 | current_buffer = nextb; | |
4970 | make_gap (-(nextb->text->gap_size - size)); | |
4971 | current_buffer = save_current; | |
4972 | } | |
4973 | } | |
4974 | ||
4975 | nextb = nextb->next; | |
4976 | } | |
4977 | } | |
4978 | ||
4979 | EMACS_GET_TIME (t1); | |
4980 | ||
58595309 KH |
4981 | /* In case user calls debug_print during GC, |
4982 | don't let that cause a recursive GC. */ | |
4983 | consing_since_gc = 0; | |
4984 | ||
6efc7df7 GM |
4985 | /* Save what's currently displayed in the echo area. */ |
4986 | message_p = push_message (); | |
c55b0da6 | 4987 | record_unwind_protect (pop_message_unwind, Qnil); |
41c28a37 | 4988 | |
7146af97 JB |
4989 | /* Save a copy of the contents of the stack, for debugging. */ |
4990 | #if MAX_SAVE_STACK > 0 | |
265a9e55 | 4991 | if (NILP (Vpurify_flag)) |
7146af97 JB |
4992 | { |
4993 | i = &stack_top_variable - stack_bottom; | |
4994 | if (i < 0) i = -i; | |
4995 | if (i < MAX_SAVE_STACK) | |
4996 | { | |
4997 | if (stack_copy == 0) | |
9ac0d9e0 | 4998 | stack_copy = (char *) xmalloc (stack_copy_size = i); |
7146af97 | 4999 | else if (stack_copy_size < i) |
9ac0d9e0 | 5000 | stack_copy = (char *) xrealloc (stack_copy, (stack_copy_size = i)); |
7146af97 JB |
5001 | if (stack_copy) |
5002 | { | |
42607681 | 5003 | if ((EMACS_INT) (&stack_top_variable - stack_bottom) > 0) |
7146af97 JB |
5004 | bcopy (stack_bottom, stack_copy, i); |
5005 | else | |
5006 | bcopy (&stack_top_variable, stack_copy, i); | |
5007 | } | |
5008 | } | |
5009 | } | |
5010 | #endif /* MAX_SAVE_STACK > 0 */ | |
5011 | ||
299585ee | 5012 | if (garbage_collection_messages) |
691c4285 | 5013 | message1_nolog ("Garbage collecting..."); |
7146af97 | 5014 | |
6e0fca1d RS |
5015 | BLOCK_INPUT; |
5016 | ||
eec7b73d RS |
5017 | shrink_regexp_cache (); |
5018 | ||
7146af97 JB |
5019 | gc_in_progress = 1; |
5020 | ||
c23baf9f | 5021 | /* clear_marks (); */ |
7146af97 | 5022 | |
0930c1a1 | 5023 | /* Mark all the special slots that serve as the roots of accessibility. */ |
7146af97 JB |
5024 | |
5025 | for (i = 0; i < staticidx; i++) | |
49723c04 | 5026 | mark_object (*staticvec[i]); |
34400008 | 5027 | |
126f9c02 SM |
5028 | for (bind = specpdl; bind != specpdl_ptr; bind++) |
5029 | { | |
5030 | mark_object (bind->symbol); | |
5031 | mark_object (bind->old_value); | |
5032 | } | |
5033 | mark_kboards (); | |
5034 | ||
5035 | #ifdef USE_GTK | |
5036 | { | |
5037 | extern void xg_mark_data (); | |
5038 | xg_mark_data (); | |
5039 | } | |
5040 | #endif | |
5041 | ||
34400008 GM |
5042 | #if (GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS \ |
5043 | || GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS) | |
5044 | mark_stack (); | |
5045 | #else | |
acf5f7d3 SM |
5046 | { |
5047 | register struct gcpro *tail; | |
5048 | for (tail = gcprolist; tail; tail = tail->next) | |
5049 | for (i = 0; i < tail->nvars; i++) | |
0930c1a1 | 5050 | mark_object (tail->var[i]); |
acf5f7d3 | 5051 | } |
34400008 | 5052 | #endif |
177c0ea7 | 5053 | |
630686c8 | 5054 | mark_byte_stack (); |
7146af97 JB |
5055 | for (catch = catchlist; catch; catch = catch->next) |
5056 | { | |
49723c04 SM |
5057 | mark_object (catch->tag); |
5058 | mark_object (catch->val); | |
177c0ea7 | 5059 | } |
7146af97 JB |
5060 | for (handler = handlerlist; handler; handler = handler->next) |
5061 | { | |
49723c04 SM |
5062 | mark_object (handler->handler); |
5063 | mark_object (handler->var); | |
177c0ea7 | 5064 | } |
b40ea20a | 5065 | mark_backtrace (); |
7146af97 | 5066 | |
454d7973 KS |
5067 | #ifdef HAVE_WINDOW_SYSTEM |
5068 | mark_fringe_data (); | |
5069 | #endif | |
5070 | ||
74c35a48 SM |
5071 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
5072 | mark_stack (); | |
5073 | #endif | |
5074 | ||
c37adf23 SM |
5075 | /* Everything is now marked, except for the things that require special |
5076 | finalization, i.e. the undo_list. | |
5077 | Look thru every buffer's undo list | |
5078 | for elements that update markers that were not marked, | |
5079 | and delete them. */ | |
4c315bda RS |
5080 | { |
5081 | register struct buffer *nextb = all_buffers; | |
5082 | ||
5083 | while (nextb) | |
5084 | { | |
5085 | /* If a buffer's undo list is Qt, that means that undo is | |
c37adf23 SM |
5086 | turned off in that buffer. Calling truncate_undo_list on |
5087 | Qt tends to return NULL, which effectively turns undo back on. | |
5088 | So don't call truncate_undo_list if undo_list is Qt. */ | |
4c315bda RS |
5089 | if (! EQ (nextb->undo_list, Qt)) |
5090 | { | |
c37adf23 | 5091 | Lisp_Object tail, prev; |
4c315bda RS |
5092 | tail = nextb->undo_list; |
5093 | prev = Qnil; | |
5094 | while (CONSP (tail)) | |
5095 | { | |
c37adf23 SM |
5096 | if (GC_CONSP (XCAR (tail)) |
5097 | && GC_MARKERP (XCAR (XCAR (tail))) | |
5098 | && !XMARKER (XCAR (XCAR (tail)))->gcmarkbit) | |
4c315bda RS |
5099 | { |
5100 | if (NILP (prev)) | |
c37adf23 | 5101 | nextb->undo_list = tail = XCDR (tail); |
4c315bda | 5102 | else |
f3fbd155 | 5103 | { |
c37adf23 | 5104 | tail = XCDR (tail); |
f3fbd155 KR |
5105 | XSETCDR (prev, tail); |
5106 | } | |
4c315bda RS |
5107 | } |
5108 | else | |
5109 | { | |
5110 | prev = tail; | |
70949dac | 5111 | tail = XCDR (tail); |
4c315bda RS |
5112 | } |
5113 | } | |
5114 | } | |
c37adf23 SM |
5115 | /* Now that we have stripped the elements that need not be in the |
5116 | undo_list any more, we can finally mark the list. */ | |
5117 | mark_object (nextb->undo_list); | |
4c315bda RS |
5118 | |
5119 | nextb = nextb->next; | |
5120 | } | |
5121 | } | |
5122 | ||
c37adf23 | 5123 | gc_sweep (); |
6b67a518 | 5124 | |
7146af97 JB |
5125 | /* Clear the mark bits that we set in certain root slots. */ |
5126 | ||
033a5fa3 | 5127 | unmark_byte_stack (); |
3ef06d12 SM |
5128 | VECTOR_UNMARK (&buffer_defaults); |
5129 | VECTOR_UNMARK (&buffer_local_symbols); | |
7146af97 | 5130 | |
34400008 GM |
5131 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES && 0 |
5132 | dump_zombies (); | |
5133 | #endif | |
5134 | ||
6e0fca1d RS |
5135 | UNBLOCK_INPUT; |
5136 | ||
bbc012e0 KS |
5137 | CHECK_CONS_LIST (); |
5138 | ||
c23baf9f | 5139 | /* clear_marks (); */ |
7146af97 JB |
5140 | gc_in_progress = 0; |
5141 | ||
5142 | consing_since_gc = 0; | |
5143 | if (gc_cons_threshold < 10000) | |
5144 | gc_cons_threshold = 10000; | |
5145 | ||
96f077ad SM |
5146 | if (FLOATP (Vgc_cons_percentage)) |
5147 | { /* Set gc_cons_combined_threshold. */ | |
5148 | EMACS_INT total = 0; | |
974aae61 | 5149 | |
96f077ad SM |
5150 | total += total_conses * sizeof (struct Lisp_Cons); |
5151 | total += total_symbols * sizeof (struct Lisp_Symbol); | |
5152 | total += total_markers * sizeof (union Lisp_Misc); | |
5153 | total += total_string_size; | |
5154 | total += total_vector_size * sizeof (Lisp_Object); | |
5155 | total += total_floats * sizeof (struct Lisp_Float); | |
5156 | total += total_intervals * sizeof (struct interval); | |
5157 | total += total_strings * sizeof (struct Lisp_String); | |
3cd55735 | 5158 | |
974aae61 | 5159 | gc_relative_threshold = total * XFLOAT_DATA (Vgc_cons_percentage); |
96f077ad | 5160 | } |
974aae61 RS |
5161 | else |
5162 | gc_relative_threshold = 0; | |
96f077ad | 5163 | |
299585ee RS |
5164 | if (garbage_collection_messages) |
5165 | { | |
6efc7df7 GM |
5166 | if (message_p || minibuf_level > 0) |
5167 | restore_message (); | |
299585ee RS |
5168 | else |
5169 | message1_nolog ("Garbage collecting...done"); | |
5170 | } | |
7146af97 | 5171 | |
98edb5ff | 5172 | unbind_to (count, Qnil); |
2e471eb5 GM |
5173 | |
5174 | total[0] = Fcons (make_number (total_conses), | |
5175 | make_number (total_free_conses)); | |
5176 | total[1] = Fcons (make_number (total_symbols), | |
5177 | make_number (total_free_symbols)); | |
5178 | total[2] = Fcons (make_number (total_markers), | |
5179 | make_number (total_free_markers)); | |
96117bc7 GM |
5180 | total[3] = make_number (total_string_size); |
5181 | total[4] = make_number (total_vector_size); | |
5182 | total[5] = Fcons (make_number (total_floats), | |
2e471eb5 | 5183 | make_number (total_free_floats)); |
96117bc7 | 5184 | total[6] = Fcons (make_number (total_intervals), |
2e471eb5 | 5185 | make_number (total_free_intervals)); |
96117bc7 | 5186 | total[7] = Fcons (make_number (total_strings), |
2e471eb5 GM |
5187 | make_number (total_free_strings)); |
5188 | ||
34400008 | 5189 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
7146af97 | 5190 | { |
34400008 GM |
5191 | /* Compute average percentage of zombies. */ |
5192 | double nlive = 0; | |
177c0ea7 | 5193 | |
34400008 | 5194 | for (i = 0; i < 7; ++i) |
83fc9c63 DL |
5195 | if (CONSP (total[i])) |
5196 | nlive += XFASTINT (XCAR (total[i])); | |
34400008 GM |
5197 | |
5198 | avg_live = (avg_live * ngcs + nlive) / (ngcs + 1); | |
5199 | max_live = max (nlive, max_live); | |
5200 | avg_zombies = (avg_zombies * ngcs + nzombies) / (ngcs + 1); | |
5201 | max_zombies = max (nzombies, max_zombies); | |
5202 | ++ngcs; | |
5203 | } | |
5204 | #endif | |
7146af97 | 5205 | |
9e713715 GM |
5206 | if (!NILP (Vpost_gc_hook)) |
5207 | { | |
5208 | int count = inhibit_garbage_collection (); | |
5209 | safe_run_hooks (Qpost_gc_hook); | |
5210 | unbind_to (count, Qnil); | |
5211 | } | |
2c5bd608 DL |
5212 | |
5213 | /* Accumulate statistics. */ | |
5214 | EMACS_GET_TIME (t2); | |
5215 | EMACS_SUB_TIME (t3, t2, t1); | |
5216 | if (FLOATP (Vgc_elapsed)) | |
69ab9f85 SM |
5217 | Vgc_elapsed = make_float (XFLOAT_DATA (Vgc_elapsed) + |
5218 | EMACS_SECS (t3) + | |
5219 | EMACS_USECS (t3) * 1.0e-6); | |
2c5bd608 DL |
5220 | gcs_done++; |
5221 | ||
96117bc7 | 5222 | return Flist (sizeof total / sizeof *total, total); |
7146af97 | 5223 | } |
34400008 | 5224 | |
41c28a37 | 5225 | |
3770920e GM |
5226 | /* Mark Lisp objects in glyph matrix MATRIX. Currently the |
5227 | only interesting objects referenced from glyphs are strings. */ | |
41c28a37 GM |
5228 | |
5229 | static void | |
5230 | mark_glyph_matrix (matrix) | |
5231 | struct glyph_matrix *matrix; | |
5232 | { | |
5233 | struct glyph_row *row = matrix->rows; | |
5234 | struct glyph_row *end = row + matrix->nrows; | |
5235 | ||
2e471eb5 GM |
5236 | for (; row < end; ++row) |
5237 | if (row->enabled_p) | |
5238 | { | |
5239 | int area; | |
5240 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
5241 | { | |
5242 | struct glyph *glyph = row->glyphs[area]; | |
5243 | struct glyph *end_glyph = glyph + row->used[area]; | |
177c0ea7 | 5244 | |
2e471eb5 GM |
5245 | for (; glyph < end_glyph; ++glyph) |
5246 | if (GC_STRINGP (glyph->object) | |
5247 | && !STRING_MARKED_P (XSTRING (glyph->object))) | |
49723c04 | 5248 | mark_object (glyph->object); |
2e471eb5 GM |
5249 | } |
5250 | } | |
41c28a37 GM |
5251 | } |
5252 | ||
34400008 | 5253 | |
41c28a37 GM |
5254 | /* Mark Lisp faces in the face cache C. */ |
5255 | ||
5256 | static void | |
5257 | mark_face_cache (c) | |
5258 | struct face_cache *c; | |
5259 | { | |
5260 | if (c) | |
5261 | { | |
5262 | int i, j; | |
5263 | for (i = 0; i < c->used; ++i) | |
5264 | { | |
5265 | struct face *face = FACE_FROM_ID (c->f, i); | |
5266 | ||
5267 | if (face) | |
5268 | { | |
5269 | for (j = 0; j < LFACE_VECTOR_SIZE; ++j) | |
49723c04 | 5270 | mark_object (face->lface[j]); |
41c28a37 GM |
5271 | } |
5272 | } | |
5273 | } | |
5274 | } | |
5275 | ||
5276 | ||
5277 | #ifdef HAVE_WINDOW_SYSTEM | |
5278 | ||
5279 | /* Mark Lisp objects in image IMG. */ | |
5280 | ||
5281 | static void | |
5282 | mark_image (img) | |
5283 | struct image *img; | |
5284 | { | |
49723c04 | 5285 | mark_object (img->spec); |
177c0ea7 | 5286 | |
3e60b029 | 5287 | if (!NILP (img->data.lisp_val)) |
49723c04 | 5288 | mark_object (img->data.lisp_val); |
41c28a37 GM |
5289 | } |
5290 | ||
5291 | ||
5292 | /* Mark Lisp objects in image cache of frame F. It's done this way so | |
5293 | that we don't have to include xterm.h here. */ | |
5294 | ||
5295 | static void | |
5296 | mark_image_cache (f) | |
5297 | struct frame *f; | |
5298 | { | |
5299 | forall_images_in_image_cache (f, mark_image); | |
5300 | } | |
5301 | ||
5302 | #endif /* HAVE_X_WINDOWS */ | |
5303 | ||
5304 | ||
7146af97 | 5305 | \f |
1a4f1e2c | 5306 | /* Mark reference to a Lisp_Object. |
2e471eb5 GM |
5307 | If the object referred to has not been seen yet, recursively mark |
5308 | all the references contained in it. */ | |
7146af97 | 5309 | |
785cd37f | 5310 | #define LAST_MARKED_SIZE 500 |
49723c04 | 5311 | Lisp_Object last_marked[LAST_MARKED_SIZE]; |
785cd37f RS |
5312 | int last_marked_index; |
5313 | ||
1342fc6f RS |
5314 | /* For debugging--call abort when we cdr down this many |
5315 | links of a list, in mark_object. In debugging, | |
5316 | the call to abort will hit a breakpoint. | |
5317 | Normally this is zero and the check never goes off. */ | |
5318 | int mark_object_loop_halt; | |
5319 | ||
41c28a37 | 5320 | void |
49723c04 SM |
5321 | mark_object (arg) |
5322 | Lisp_Object arg; | |
7146af97 | 5323 | { |
49723c04 | 5324 | register Lisp_Object obj = arg; |
4f5c1376 GM |
5325 | #ifdef GC_CHECK_MARKED_OBJECTS |
5326 | void *po; | |
5327 | struct mem_node *m; | |
5328 | #endif | |
1342fc6f | 5329 | int cdr_count = 0; |
7146af97 | 5330 | |
9149e743 | 5331 | loop: |
7146af97 | 5332 | |
1f0b3fd2 | 5333 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
5334 | return; |
5335 | ||
49723c04 | 5336 | last_marked[last_marked_index++] = obj; |
785cd37f RS |
5337 | if (last_marked_index == LAST_MARKED_SIZE) |
5338 | last_marked_index = 0; | |
5339 | ||
4f5c1376 GM |
5340 | /* Perform some sanity checks on the objects marked here. Abort if |
5341 | we encounter an object we know is bogus. This increases GC time | |
5342 | by ~80%, and requires compilation with GC_MARK_STACK != 0. */ | |
5343 | #ifdef GC_CHECK_MARKED_OBJECTS | |
5344 | ||
5345 | po = (void *) XPNTR (obj); | |
5346 | ||
5347 | /* Check that the object pointed to by PO is known to be a Lisp | |
5348 | structure allocated from the heap. */ | |
5349 | #define CHECK_ALLOCATED() \ | |
5350 | do { \ | |
5351 | m = mem_find (po); \ | |
5352 | if (m == MEM_NIL) \ | |
5353 | abort (); \ | |
5354 | } while (0) | |
5355 | ||
5356 | /* Check that the object pointed to by PO is live, using predicate | |
5357 | function LIVEP. */ | |
5358 | #define CHECK_LIVE(LIVEP) \ | |
5359 | do { \ | |
5360 | if (!LIVEP (m, po)) \ | |
5361 | abort (); \ | |
5362 | } while (0) | |
5363 | ||
5364 | /* Check both of the above conditions. */ | |
5365 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) \ | |
5366 | do { \ | |
5367 | CHECK_ALLOCATED (); \ | |
5368 | CHECK_LIVE (LIVEP); \ | |
5369 | } while (0) \ | |
177c0ea7 | 5370 | |
4f5c1376 | 5371 | #else /* not GC_CHECK_MARKED_OBJECTS */ |
177c0ea7 | 5372 | |
4f5c1376 GM |
5373 | #define CHECK_ALLOCATED() (void) 0 |
5374 | #define CHECK_LIVE(LIVEP) (void) 0 | |
5375 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) (void) 0 | |
177c0ea7 | 5376 | |
4f5c1376 GM |
5377 | #endif /* not GC_CHECK_MARKED_OBJECTS */ |
5378 | ||
0220c518 | 5379 | switch (SWITCH_ENUM_CAST (XGCTYPE (obj))) |
7146af97 JB |
5380 | { |
5381 | case Lisp_String: | |
5382 | { | |
5383 | register struct Lisp_String *ptr = XSTRING (obj); | |
4f5c1376 | 5384 | CHECK_ALLOCATED_AND_LIVE (live_string_p); |
d5e35230 | 5385 | MARK_INTERVAL_TREE (ptr->intervals); |
2e471eb5 | 5386 | MARK_STRING (ptr); |
361b097f | 5387 | #ifdef GC_CHECK_STRING_BYTES |
676a7251 GM |
5388 | /* Check that the string size recorded in the string is the |
5389 | same as the one recorded in the sdata structure. */ | |
5390 | CHECK_STRING_BYTES (ptr); | |
361b097f | 5391 | #endif /* GC_CHECK_STRING_BYTES */ |
7146af97 JB |
5392 | } |
5393 | break; | |
5394 | ||
76437631 | 5395 | case Lisp_Vectorlike: |
4f5c1376 GM |
5396 | #ifdef GC_CHECK_MARKED_OBJECTS |
5397 | m = mem_find (po); | |
5398 | if (m == MEM_NIL && !GC_SUBRP (obj) | |
5399 | && po != &buffer_defaults | |
5400 | && po != &buffer_local_symbols) | |
5401 | abort (); | |
5402 | #endif /* GC_CHECK_MARKED_OBJECTS */ | |
177c0ea7 | 5403 | |
30e3190a | 5404 | if (GC_BUFFERP (obj)) |
6b552283 | 5405 | { |
3ef06d12 | 5406 | if (!VECTOR_MARKED_P (XBUFFER (obj))) |
4f5c1376 GM |
5407 | { |
5408 | #ifdef GC_CHECK_MARKED_OBJECTS | |
5409 | if (po != &buffer_defaults && po != &buffer_local_symbols) | |
5410 | { | |
5411 | struct buffer *b; | |
5412 | for (b = all_buffers; b && b != po; b = b->next) | |
5413 | ; | |
5414 | if (b == NULL) | |
5415 | abort (); | |
5416 | } | |
5417 | #endif /* GC_CHECK_MARKED_OBJECTS */ | |
5418 | mark_buffer (obj); | |
5419 | } | |
6b552283 | 5420 | } |
30e3190a | 5421 | else if (GC_SUBRP (obj)) |
169ee243 RS |
5422 | break; |
5423 | else if (GC_COMPILEDP (obj)) | |
2e471eb5 GM |
5424 | /* We could treat this just like a vector, but it is better to |
5425 | save the COMPILED_CONSTANTS element for last and avoid | |
5426 | recursion there. */ | |
169ee243 RS |
5427 | { |
5428 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
5429 | register EMACS_INT size = ptr->size; | |
169ee243 RS |
5430 | register int i; |
5431 | ||
3ef06d12 | 5432 | if (VECTOR_MARKED_P (ptr)) |
169ee243 | 5433 | break; /* Already marked */ |
177c0ea7 | 5434 | |
4f5c1376 | 5435 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 5436 | VECTOR_MARK (ptr); /* Else mark it */ |
76437631 | 5437 | size &= PSEUDOVECTOR_SIZE_MASK; |
169ee243 RS |
5438 | for (i = 0; i < size; i++) /* and then mark its elements */ |
5439 | { | |
5440 | if (i != COMPILED_CONSTANTS) | |
49723c04 | 5441 | mark_object (ptr->contents[i]); |
169ee243 | 5442 | } |
49723c04 | 5443 | obj = ptr->contents[COMPILED_CONSTANTS]; |
169ee243 RS |
5444 | goto loop; |
5445 | } | |
169ee243 RS |
5446 | else if (GC_FRAMEP (obj)) |
5447 | { | |
c70bbf06 | 5448 | register struct frame *ptr = XFRAME (obj); |
169ee243 | 5449 | |
3ef06d12 SM |
5450 | if (VECTOR_MARKED_P (ptr)) break; /* Already marked */ |
5451 | VECTOR_MARK (ptr); /* Else mark it */ | |
169ee243 | 5452 | |
4f5c1376 | 5453 | CHECK_LIVE (live_vector_p); |
49723c04 SM |
5454 | mark_object (ptr->name); |
5455 | mark_object (ptr->icon_name); | |
5456 | mark_object (ptr->title); | |
5457 | mark_object (ptr->focus_frame); | |
5458 | mark_object (ptr->selected_window); | |
5459 | mark_object (ptr->minibuffer_window); | |
5460 | mark_object (ptr->param_alist); | |
5461 | mark_object (ptr->scroll_bars); | |
5462 | mark_object (ptr->condemned_scroll_bars); | |
5463 | mark_object (ptr->menu_bar_items); | |
5464 | mark_object (ptr->face_alist); | |
5465 | mark_object (ptr->menu_bar_vector); | |
5466 | mark_object (ptr->buffer_predicate); | |
5467 | mark_object (ptr->buffer_list); | |
5468 | mark_object (ptr->menu_bar_window); | |
5469 | mark_object (ptr->tool_bar_window); | |
41c28a37 GM |
5470 | mark_face_cache (ptr->face_cache); |
5471 | #ifdef HAVE_WINDOW_SYSTEM | |
5472 | mark_image_cache (ptr); | |
49723c04 SM |
5473 | mark_object (ptr->tool_bar_items); |
5474 | mark_object (ptr->desired_tool_bar_string); | |
5475 | mark_object (ptr->current_tool_bar_string); | |
41c28a37 | 5476 | #endif /* HAVE_WINDOW_SYSTEM */ |
169ee243 | 5477 | } |
7b07587b | 5478 | else if (GC_BOOL_VECTOR_P (obj)) |
707788bd RS |
5479 | { |
5480 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
5481 | ||
3ef06d12 | 5482 | if (VECTOR_MARKED_P (ptr)) |
707788bd | 5483 | break; /* Already marked */ |
4f5c1376 | 5484 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 5485 | VECTOR_MARK (ptr); /* Else mark it */ |
707788bd | 5486 | } |
41c28a37 GM |
5487 | else if (GC_WINDOWP (obj)) |
5488 | { | |
5489 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
5490 | struct window *w = XWINDOW (obj); | |
41c28a37 GM |
5491 | register int i; |
5492 | ||
5493 | /* Stop if already marked. */ | |
3ef06d12 | 5494 | if (VECTOR_MARKED_P (ptr)) |
41c28a37 GM |
5495 | break; |
5496 | ||
5497 | /* Mark it. */ | |
4f5c1376 | 5498 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 5499 | VECTOR_MARK (ptr); |
41c28a37 GM |
5500 | |
5501 | /* There is no Lisp data above The member CURRENT_MATRIX in | |
5502 | struct WINDOW. Stop marking when that slot is reached. */ | |
5503 | for (i = 0; | |
c70bbf06 | 5504 | (char *) &ptr->contents[i] < (char *) &w->current_matrix; |
41c28a37 | 5505 | i++) |
49723c04 | 5506 | mark_object (ptr->contents[i]); |
41c28a37 GM |
5507 | |
5508 | /* Mark glyphs for leaf windows. Marking window matrices is | |
5509 | sufficient because frame matrices use the same glyph | |
5510 | memory. */ | |
5511 | if (NILP (w->hchild) | |
5512 | && NILP (w->vchild) | |
5513 | && w->current_matrix) | |
5514 | { | |
5515 | mark_glyph_matrix (w->current_matrix); | |
5516 | mark_glyph_matrix (w->desired_matrix); | |
5517 | } | |
5518 | } | |
5519 | else if (GC_HASH_TABLE_P (obj)) | |
5520 | { | |
5521 | struct Lisp_Hash_Table *h = XHASH_TABLE (obj); | |
177c0ea7 | 5522 | |
41c28a37 | 5523 | /* Stop if already marked. */ |
3ef06d12 | 5524 | if (VECTOR_MARKED_P (h)) |
41c28a37 | 5525 | break; |
177c0ea7 | 5526 | |
41c28a37 | 5527 | /* Mark it. */ |
4f5c1376 | 5528 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 5529 | VECTOR_MARK (h); |
41c28a37 GM |
5530 | |
5531 | /* Mark contents. */ | |
94a877ef | 5532 | /* Do not mark next_free or next_weak. |
177c0ea7 | 5533 | Being in the next_weak chain |
94a877ef RS |
5534 | should not keep the hash table alive. |
5535 | No need to mark `count' since it is an integer. */ | |
49723c04 SM |
5536 | mark_object (h->test); |
5537 | mark_object (h->weak); | |
5538 | mark_object (h->rehash_size); | |
5539 | mark_object (h->rehash_threshold); | |
5540 | mark_object (h->hash); | |
5541 | mark_object (h->next); | |
5542 | mark_object (h->index); | |
5543 | mark_object (h->user_hash_function); | |
5544 | mark_object (h->user_cmp_function); | |
41c28a37 GM |
5545 | |
5546 | /* If hash table is not weak, mark all keys and values. | |
5547 | For weak tables, mark only the vector. */ | |
5548 | if (GC_NILP (h->weak)) | |
49723c04 | 5549 | mark_object (h->key_and_value); |
41c28a37 | 5550 | else |
3ef06d12 | 5551 | VECTOR_MARK (XVECTOR (h->key_and_value)); |
41c28a37 | 5552 | } |
04ff9756 | 5553 | else |
169ee243 RS |
5554 | { |
5555 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
5556 | register EMACS_INT size = ptr->size; | |
169ee243 RS |
5557 | register int i; |
5558 | ||
3ef06d12 | 5559 | if (VECTOR_MARKED_P (ptr)) break; /* Already marked */ |
4f5c1376 | 5560 | CHECK_LIVE (live_vector_p); |
3ef06d12 | 5561 | VECTOR_MARK (ptr); /* Else mark it */ |
169ee243 RS |
5562 | if (size & PSEUDOVECTOR_FLAG) |
5563 | size &= PSEUDOVECTOR_SIZE_MASK; | |
41c28a37 | 5564 | |
6bfd98e7 SM |
5565 | /* Note that this size is not the memory-footprint size, but only |
5566 | the number of Lisp_Object fields that we should trace. | |
5567 | The distinction is used e.g. by Lisp_Process which places extra | |
5568 | non-Lisp_Object fields at the end of the structure. */ | |
169ee243 | 5569 | for (i = 0; i < size; i++) /* and then mark its elements */ |
49723c04 | 5570 | mark_object (ptr->contents[i]); |
169ee243 RS |
5571 | } |
5572 | break; | |
7146af97 | 5573 | |
7146af97 JB |
5574 | case Lisp_Symbol: |
5575 | { | |
c70bbf06 | 5576 | register struct Lisp_Symbol *ptr = XSYMBOL (obj); |
7146af97 JB |
5577 | struct Lisp_Symbol *ptrx; |
5578 | ||
2336fe58 | 5579 | if (ptr->gcmarkbit) break; |
4f5c1376 | 5580 | CHECK_ALLOCATED_AND_LIVE (live_symbol_p); |
2336fe58 | 5581 | ptr->gcmarkbit = 1; |
49723c04 SM |
5582 | mark_object (ptr->value); |
5583 | mark_object (ptr->function); | |
5584 | mark_object (ptr->plist); | |
34400008 | 5585 | |
8fe5665d KR |
5586 | if (!PURE_POINTER_P (XSTRING (ptr->xname))) |
5587 | MARK_STRING (XSTRING (ptr->xname)); | |
d5db4077 | 5588 | MARK_INTERVAL_TREE (STRING_INTERVALS (ptr->xname)); |
177c0ea7 | 5589 | |
1c6bb482 RS |
5590 | /* Note that we do not mark the obarray of the symbol. |
5591 | It is safe not to do so because nothing accesses that | |
5592 | slot except to check whether it is nil. */ | |
7146af97 JB |
5593 | ptr = ptr->next; |
5594 | if (ptr) | |
5595 | { | |
b0846f52 | 5596 | ptrx = ptr; /* Use of ptrx avoids compiler bug on Sun */ |
7146af97 | 5597 | XSETSYMBOL (obj, ptrx); |
49723c04 | 5598 | goto loop; |
7146af97 JB |
5599 | } |
5600 | } | |
5601 | break; | |
5602 | ||
a0a38eb7 | 5603 | case Lisp_Misc: |
4f5c1376 | 5604 | CHECK_ALLOCATED_AND_LIVE (live_misc_p); |
2336fe58 SM |
5605 | if (XMARKER (obj)->gcmarkbit) |
5606 | break; | |
5607 | XMARKER (obj)->gcmarkbit = 1; | |
b766f870 | 5608 | |
a5da44fe | 5609 | switch (XMISCTYPE (obj)) |
a0a38eb7 | 5610 | { |
465edf35 KH |
5611 | case Lisp_Misc_Buffer_Local_Value: |
5612 | case Lisp_Misc_Some_Buffer_Local_Value: | |
5613 | { | |
5614 | register struct Lisp_Buffer_Local_Value *ptr | |
5615 | = XBUFFER_LOCAL_VALUE (obj); | |
465edf35 KH |
5616 | /* If the cdr is nil, avoid recursion for the car. */ |
5617 | if (EQ (ptr->cdr, Qnil)) | |
5618 | { | |
49723c04 | 5619 | obj = ptr->realvalue; |
465edf35 KH |
5620 | goto loop; |
5621 | } | |
49723c04 SM |
5622 | mark_object (ptr->realvalue); |
5623 | mark_object (ptr->buffer); | |
5624 | mark_object (ptr->frame); | |
5625 | obj = ptr->cdr; | |
465edf35 KH |
5626 | goto loop; |
5627 | } | |
5628 | ||
2336fe58 SM |
5629 | case Lisp_Misc_Marker: |
5630 | /* DO NOT mark thru the marker's chain. | |
5631 | The buffer's markers chain does not preserve markers from gc; | |
5632 | instead, markers are removed from the chain when freed by gc. */ | |
b766f870 KS |
5633 | break; |
5634 | ||
c8616056 KH |
5635 | case Lisp_Misc_Intfwd: |
5636 | case Lisp_Misc_Boolfwd: | |
5637 | case Lisp_Misc_Objfwd: | |
5638 | case Lisp_Misc_Buffer_Objfwd: | |
b875d3f7 | 5639 | case Lisp_Misc_Kboard_Objfwd: |
c8616056 KH |
5640 | /* Don't bother with Lisp_Buffer_Objfwd, |
5641 | since all markable slots in current buffer marked anyway. */ | |
5642 | /* Don't need to do Lisp_Objfwd, since the places they point | |
5643 | are protected with staticpro. */ | |
b766f870 KS |
5644 | break; |
5645 | ||
f29181dc | 5646 | case Lisp_Misc_Save_Value: |
9ea306d1 | 5647 | #if GC_MARK_STACK |
b766f870 KS |
5648 | { |
5649 | register struct Lisp_Save_Value *ptr = XSAVE_VALUE (obj); | |
5650 | /* If DOGC is set, POINTER is the address of a memory | |
5651 | area containing INTEGER potential Lisp_Objects. */ | |
5652 | if (ptr->dogc) | |
5653 | { | |
5654 | Lisp_Object *p = (Lisp_Object *) ptr->pointer; | |
5655 | int nelt; | |
5656 | for (nelt = ptr->integer; nelt > 0; nelt--, p++) | |
5657 | mark_maybe_object (*p); | |
5658 | } | |
5659 | } | |
9ea306d1 | 5660 | #endif |
c8616056 KH |
5661 | break; |
5662 | ||
e202fa34 KH |
5663 | case Lisp_Misc_Overlay: |
5664 | { | |
5665 | struct Lisp_Overlay *ptr = XOVERLAY (obj); | |
49723c04 SM |
5666 | mark_object (ptr->start); |
5667 | mark_object (ptr->end); | |
f54253ec SM |
5668 | mark_object (ptr->plist); |
5669 | if (ptr->next) | |
5670 | { | |
5671 | XSETMISC (obj, ptr->next); | |
5672 | goto loop; | |
5673 | } | |
e202fa34 KH |
5674 | } |
5675 | break; | |
5676 | ||
a0a38eb7 KH |
5677 | default: |
5678 | abort (); | |
5679 | } | |
7146af97 JB |
5680 | break; |
5681 | ||
5682 | case Lisp_Cons: | |
7146af97 JB |
5683 | { |
5684 | register struct Lisp_Cons *ptr = XCONS (obj); | |
08b7c2cb | 5685 | if (CONS_MARKED_P (ptr)) break; |
4f5c1376 | 5686 | CHECK_ALLOCATED_AND_LIVE (live_cons_p); |
08b7c2cb | 5687 | CONS_MARK (ptr); |
c54ca951 | 5688 | /* If the cdr is nil, avoid recursion for the car. */ |
28a099a4 | 5689 | if (EQ (ptr->u.cdr, Qnil)) |
c54ca951 | 5690 | { |
49723c04 | 5691 | obj = ptr->car; |
1342fc6f | 5692 | cdr_count = 0; |
c54ca951 RS |
5693 | goto loop; |
5694 | } | |
49723c04 | 5695 | mark_object (ptr->car); |
28a099a4 | 5696 | obj = ptr->u.cdr; |
1342fc6f RS |
5697 | cdr_count++; |
5698 | if (cdr_count == mark_object_loop_halt) | |
5699 | abort (); | |
7146af97 JB |
5700 | goto loop; |
5701 | } | |
5702 | ||
7146af97 | 5703 | case Lisp_Float: |
4f5c1376 | 5704 | CHECK_ALLOCATED_AND_LIVE (live_float_p); |
ab6780cd | 5705 | FLOAT_MARK (XFLOAT (obj)); |
7146af97 | 5706 | break; |
7146af97 | 5707 | |
7146af97 | 5708 | case Lisp_Int: |
7146af97 JB |
5709 | break; |
5710 | ||
5711 | default: | |
5712 | abort (); | |
5713 | } | |
4f5c1376 GM |
5714 | |
5715 | #undef CHECK_LIVE | |
5716 | #undef CHECK_ALLOCATED | |
5717 | #undef CHECK_ALLOCATED_AND_LIVE | |
7146af97 JB |
5718 | } |
5719 | ||
5720 | /* Mark the pointers in a buffer structure. */ | |
5721 | ||
5722 | static void | |
5723 | mark_buffer (buf) | |
5724 | Lisp_Object buf; | |
5725 | { | |
7146af97 | 5726 | register struct buffer *buffer = XBUFFER (buf); |
f54253ec | 5727 | register Lisp_Object *ptr, tmp; |
30e3190a | 5728 | Lisp_Object base_buffer; |
7146af97 | 5729 | |
3ef06d12 | 5730 | VECTOR_MARK (buffer); |
7146af97 | 5731 | |
30e3190a | 5732 | MARK_INTERVAL_TREE (BUF_INTERVALS (buffer)); |
d5e35230 | 5733 | |
c37adf23 SM |
5734 | /* For now, we just don't mark the undo_list. It's done later in |
5735 | a special way just before the sweep phase, and after stripping | |
5736 | some of its elements that are not needed any more. */ | |
4c315bda | 5737 | |
f54253ec SM |
5738 | if (buffer->overlays_before) |
5739 | { | |
5740 | XSETMISC (tmp, buffer->overlays_before); | |
5741 | mark_object (tmp); | |
5742 | } | |
5743 | if (buffer->overlays_after) | |
5744 | { | |
5745 | XSETMISC (tmp, buffer->overlays_after); | |
5746 | mark_object (tmp); | |
5747 | } | |
5748 | ||
3ef06d12 | 5749 | for (ptr = &buffer->name; |
7146af97 JB |
5750 | (char *)ptr < (char *)buffer + sizeof (struct buffer); |
5751 | ptr++) | |
49723c04 | 5752 | mark_object (*ptr); |
30e3190a RS |
5753 | |
5754 | /* If this is an indirect buffer, mark its base buffer. */ | |
349bd9ed | 5755 | if (buffer->base_buffer && !VECTOR_MARKED_P (buffer->base_buffer)) |
30e3190a | 5756 | { |
177c0ea7 | 5757 | XSETBUFFER (base_buffer, buffer->base_buffer); |
30e3190a RS |
5758 | mark_buffer (base_buffer); |
5759 | } | |
7146af97 | 5760 | } |
084b1a0c KH |
5761 | |
5762 | ||
41c28a37 GM |
5763 | /* Value is non-zero if OBJ will survive the current GC because it's |
5764 | either marked or does not need to be marked to survive. */ | |
5765 | ||
5766 | int | |
5767 | survives_gc_p (obj) | |
5768 | Lisp_Object obj; | |
5769 | { | |
5770 | int survives_p; | |
177c0ea7 | 5771 | |
41c28a37 GM |
5772 | switch (XGCTYPE (obj)) |
5773 | { | |
5774 | case Lisp_Int: | |
5775 | survives_p = 1; | |
5776 | break; | |
5777 | ||
5778 | case Lisp_Symbol: | |
2336fe58 | 5779 | survives_p = XSYMBOL (obj)->gcmarkbit; |
41c28a37 GM |
5780 | break; |
5781 | ||
5782 | case Lisp_Misc: | |
ef89c2ce | 5783 | survives_p = XMARKER (obj)->gcmarkbit; |
41c28a37 GM |
5784 | break; |
5785 | ||
5786 | case Lisp_String: | |
08b7c2cb | 5787 | survives_p = STRING_MARKED_P (XSTRING (obj)); |
41c28a37 GM |
5788 | break; |
5789 | ||
5790 | case Lisp_Vectorlike: | |
08b7c2cb | 5791 | survives_p = GC_SUBRP (obj) || VECTOR_MARKED_P (XVECTOR (obj)); |
41c28a37 GM |
5792 | break; |
5793 | ||
5794 | case Lisp_Cons: | |
08b7c2cb | 5795 | survives_p = CONS_MARKED_P (XCONS (obj)); |
41c28a37 GM |
5796 | break; |
5797 | ||
41c28a37 | 5798 | case Lisp_Float: |
ab6780cd | 5799 | survives_p = FLOAT_MARKED_P (XFLOAT (obj)); |
41c28a37 | 5800 | break; |
41c28a37 GM |
5801 | |
5802 | default: | |
5803 | abort (); | |
5804 | } | |
5805 | ||
34400008 | 5806 | return survives_p || PURE_POINTER_P ((void *) XPNTR (obj)); |
41c28a37 GM |
5807 | } |
5808 | ||
5809 | ||
7146af97 | 5810 | \f |
1a4f1e2c | 5811 | /* Sweep: find all structures not marked, and free them. */ |
7146af97 JB |
5812 | |
5813 | static void | |
5814 | gc_sweep () | |
5815 | { | |
c37adf23 SM |
5816 | /* Remove or mark entries in weak hash tables. |
5817 | This must be done before any object is unmarked. */ | |
5818 | sweep_weak_hash_tables (); | |
5819 | ||
5820 | sweep_strings (); | |
5821 | #ifdef GC_CHECK_STRING_BYTES | |
5822 | if (!noninteractive) | |
5823 | check_string_bytes (1); | |
5824 | #endif | |
5825 | ||
7146af97 JB |
5826 | /* Put all unmarked conses on free list */ |
5827 | { | |
5828 | register struct cons_block *cblk; | |
6ca94ac9 | 5829 | struct cons_block **cprev = &cons_block; |
7146af97 JB |
5830 | register int lim = cons_block_index; |
5831 | register int num_free = 0, num_used = 0; | |
5832 | ||
5833 | cons_free_list = 0; | |
177c0ea7 | 5834 | |
6ca94ac9 | 5835 | for (cblk = cons_block; cblk; cblk = *cprev) |
7146af97 JB |
5836 | { |
5837 | register int i; | |
6ca94ac9 | 5838 | int this_free = 0; |
7146af97 | 5839 | for (i = 0; i < lim; i++) |
08b7c2cb | 5840 | if (!CONS_MARKED_P (&cblk->conses[i])) |
7146af97 | 5841 | { |
6ca94ac9 | 5842 | this_free++; |
28a099a4 | 5843 | cblk->conses[i].u.chain = cons_free_list; |
7146af97 | 5844 | cons_free_list = &cblk->conses[i]; |
34400008 GM |
5845 | #if GC_MARK_STACK |
5846 | cons_free_list->car = Vdead; | |
5847 | #endif | |
7146af97 JB |
5848 | } |
5849 | else | |
5850 | { | |
5851 | num_used++; | |
08b7c2cb | 5852 | CONS_UNMARK (&cblk->conses[i]); |
7146af97 JB |
5853 | } |
5854 | lim = CONS_BLOCK_SIZE; | |
6ca94ac9 KH |
5855 | /* If this block contains only free conses and we have already |
5856 | seen more than two blocks worth of free conses then deallocate | |
5857 | this block. */ | |
6feef451 | 5858 | if (this_free == CONS_BLOCK_SIZE && num_free > CONS_BLOCK_SIZE) |
6ca94ac9 | 5859 | { |
6ca94ac9 KH |
5860 | *cprev = cblk->next; |
5861 | /* Unhook from the free list. */ | |
28a099a4 | 5862 | cons_free_list = cblk->conses[0].u.chain; |
08b7c2cb | 5863 | lisp_align_free (cblk); |
c8099634 | 5864 | n_cons_blocks--; |
6ca94ac9 KH |
5865 | } |
5866 | else | |
6feef451 AS |
5867 | { |
5868 | num_free += this_free; | |
5869 | cprev = &cblk->next; | |
5870 | } | |
7146af97 JB |
5871 | } |
5872 | total_conses = num_used; | |
5873 | total_free_conses = num_free; | |
5874 | } | |
5875 | ||
7146af97 JB |
5876 | /* Put all unmarked floats on free list */ |
5877 | { | |
5878 | register struct float_block *fblk; | |
6ca94ac9 | 5879 | struct float_block **fprev = &float_block; |
7146af97 JB |
5880 | register int lim = float_block_index; |
5881 | register int num_free = 0, num_used = 0; | |
5882 | ||
5883 | float_free_list = 0; | |
177c0ea7 | 5884 | |
6ca94ac9 | 5885 | for (fblk = float_block; fblk; fblk = *fprev) |
7146af97 JB |
5886 | { |
5887 | register int i; | |
6ca94ac9 | 5888 | int this_free = 0; |
7146af97 | 5889 | for (i = 0; i < lim; i++) |
ab6780cd | 5890 | if (!FLOAT_MARKED_P (&fblk->floats[i])) |
7146af97 | 5891 | { |
6ca94ac9 | 5892 | this_free++; |
28a099a4 | 5893 | fblk->floats[i].u.chain = float_free_list; |
7146af97 JB |
5894 | float_free_list = &fblk->floats[i]; |
5895 | } | |
5896 | else | |
5897 | { | |
5898 | num_used++; | |
ab6780cd | 5899 | FLOAT_UNMARK (&fblk->floats[i]); |
7146af97 JB |
5900 | } |
5901 | lim = FLOAT_BLOCK_SIZE; | |
6ca94ac9 KH |
5902 | /* If this block contains only free floats and we have already |
5903 | seen more than two blocks worth of free floats then deallocate | |
5904 | this block. */ | |
6feef451 | 5905 | if (this_free == FLOAT_BLOCK_SIZE && num_free > FLOAT_BLOCK_SIZE) |
6ca94ac9 | 5906 | { |
6ca94ac9 KH |
5907 | *fprev = fblk->next; |
5908 | /* Unhook from the free list. */ | |
28a099a4 | 5909 | float_free_list = fblk->floats[0].u.chain; |
ab6780cd | 5910 | lisp_align_free (fblk); |
c8099634 | 5911 | n_float_blocks--; |
6ca94ac9 KH |
5912 | } |
5913 | else | |
6feef451 AS |
5914 | { |
5915 | num_free += this_free; | |
5916 | fprev = &fblk->next; | |
5917 | } | |
7146af97 JB |
5918 | } |
5919 | total_floats = num_used; | |
5920 | total_free_floats = num_free; | |
5921 | } | |
7146af97 | 5922 | |
d5e35230 JA |
5923 | /* Put all unmarked intervals on free list */ |
5924 | { | |
5925 | register struct interval_block *iblk; | |
6ca94ac9 | 5926 | struct interval_block **iprev = &interval_block; |
d5e35230 JA |
5927 | register int lim = interval_block_index; |
5928 | register int num_free = 0, num_used = 0; | |
5929 | ||
5930 | interval_free_list = 0; | |
5931 | ||
6ca94ac9 | 5932 | for (iblk = interval_block; iblk; iblk = *iprev) |
d5e35230 JA |
5933 | { |
5934 | register int i; | |
6ca94ac9 | 5935 | int this_free = 0; |
d5e35230 JA |
5936 | |
5937 | for (i = 0; i < lim; i++) | |
5938 | { | |
2336fe58 | 5939 | if (!iblk->intervals[i].gcmarkbit) |
d5e35230 | 5940 | { |
439d5cb4 | 5941 | SET_INTERVAL_PARENT (&iblk->intervals[i], interval_free_list); |
d5e35230 | 5942 | interval_free_list = &iblk->intervals[i]; |
6ca94ac9 | 5943 | this_free++; |
d5e35230 JA |
5944 | } |
5945 | else | |
5946 | { | |
5947 | num_used++; | |
2336fe58 | 5948 | iblk->intervals[i].gcmarkbit = 0; |
d5e35230 JA |
5949 | } |
5950 | } | |
5951 | lim = INTERVAL_BLOCK_SIZE; | |
6ca94ac9 KH |
5952 | /* If this block contains only free intervals and we have already |
5953 | seen more than two blocks worth of free intervals then | |
5954 | deallocate this block. */ | |
6feef451 | 5955 | if (this_free == INTERVAL_BLOCK_SIZE && num_free > INTERVAL_BLOCK_SIZE) |
6ca94ac9 | 5956 | { |
6ca94ac9 KH |
5957 | *iprev = iblk->next; |
5958 | /* Unhook from the free list. */ | |
439d5cb4 | 5959 | interval_free_list = INTERVAL_PARENT (&iblk->intervals[0]); |
c8099634 RS |
5960 | lisp_free (iblk); |
5961 | n_interval_blocks--; | |
6ca94ac9 KH |
5962 | } |
5963 | else | |
6feef451 AS |
5964 | { |
5965 | num_free += this_free; | |
5966 | iprev = &iblk->next; | |
5967 | } | |
d5e35230 JA |
5968 | } |
5969 | total_intervals = num_used; | |
5970 | total_free_intervals = num_free; | |
5971 | } | |
d5e35230 | 5972 | |
7146af97 JB |
5973 | /* Put all unmarked symbols on free list */ |
5974 | { | |
5975 | register struct symbol_block *sblk; | |
6ca94ac9 | 5976 | struct symbol_block **sprev = &symbol_block; |
7146af97 JB |
5977 | register int lim = symbol_block_index; |
5978 | register int num_free = 0, num_used = 0; | |
5979 | ||
d285b373 | 5980 | symbol_free_list = NULL; |
177c0ea7 | 5981 | |
6ca94ac9 | 5982 | for (sblk = symbol_block; sblk; sblk = *sprev) |
7146af97 | 5983 | { |
6ca94ac9 | 5984 | int this_free = 0; |
d285b373 GM |
5985 | struct Lisp_Symbol *sym = sblk->symbols; |
5986 | struct Lisp_Symbol *end = sym + lim; | |
5987 | ||
5988 | for (; sym < end; ++sym) | |
5989 | { | |
20035321 SM |
5990 | /* Check if the symbol was created during loadup. In such a case |
5991 | it might be pointed to by pure bytecode which we don't trace, | |
5992 | so we conservatively assume that it is live. */ | |
8fe5665d | 5993 | int pure_p = PURE_POINTER_P (XSTRING (sym->xname)); |
177c0ea7 | 5994 | |
2336fe58 | 5995 | if (!sym->gcmarkbit && !pure_p) |
d285b373 | 5996 | { |
28a099a4 | 5997 | sym->next = symbol_free_list; |
d285b373 | 5998 | symbol_free_list = sym; |
34400008 | 5999 | #if GC_MARK_STACK |
d285b373 | 6000 | symbol_free_list->function = Vdead; |
34400008 | 6001 | #endif |
d285b373 GM |
6002 | ++this_free; |
6003 | } | |
6004 | else | |
6005 | { | |
6006 | ++num_used; | |
6007 | if (!pure_p) | |
8fe5665d | 6008 | UNMARK_STRING (XSTRING (sym->xname)); |
2336fe58 | 6009 | sym->gcmarkbit = 0; |
d285b373 GM |
6010 | } |
6011 | } | |
177c0ea7 | 6012 | |
7146af97 | 6013 | lim = SYMBOL_BLOCK_SIZE; |
6ca94ac9 KH |
6014 | /* If this block contains only free symbols and we have already |
6015 | seen more than two blocks worth of free symbols then deallocate | |
6016 | this block. */ | |
6feef451 | 6017 | if (this_free == SYMBOL_BLOCK_SIZE && num_free > SYMBOL_BLOCK_SIZE) |
6ca94ac9 | 6018 | { |
6ca94ac9 KH |
6019 | *sprev = sblk->next; |
6020 | /* Unhook from the free list. */ | |
28a099a4 | 6021 | symbol_free_list = sblk->symbols[0].next; |
c8099634 RS |
6022 | lisp_free (sblk); |
6023 | n_symbol_blocks--; | |
6ca94ac9 KH |
6024 | } |
6025 | else | |
6feef451 AS |
6026 | { |
6027 | num_free += this_free; | |
6028 | sprev = &sblk->next; | |
6029 | } | |
7146af97 JB |
6030 | } |
6031 | total_symbols = num_used; | |
6032 | total_free_symbols = num_free; | |
6033 | } | |
6034 | ||
a9faeabe RS |
6035 | /* Put all unmarked misc's on free list. |
6036 | For a marker, first unchain it from the buffer it points into. */ | |
7146af97 JB |
6037 | { |
6038 | register struct marker_block *mblk; | |
6ca94ac9 | 6039 | struct marker_block **mprev = &marker_block; |
7146af97 JB |
6040 | register int lim = marker_block_index; |
6041 | register int num_free = 0, num_used = 0; | |
6042 | ||
6043 | marker_free_list = 0; | |
177c0ea7 | 6044 | |
6ca94ac9 | 6045 | for (mblk = marker_block; mblk; mblk = *mprev) |
7146af97 JB |
6046 | { |
6047 | register int i; | |
6ca94ac9 | 6048 | int this_free = 0; |
fa05e253 | 6049 | |
7146af97 | 6050 | for (i = 0; i < lim; i++) |
465edf35 | 6051 | { |
2336fe58 | 6052 | if (!mblk->markers[i].u_marker.gcmarkbit) |
465edf35 | 6053 | { |
a5da44fe | 6054 | if (mblk->markers[i].u_marker.type == Lisp_Misc_Marker) |
ef89c2ce | 6055 | unchain_marker (&mblk->markers[i].u_marker); |
fa05e253 RS |
6056 | /* Set the type of the freed object to Lisp_Misc_Free. |
6057 | We could leave the type alone, since nobody checks it, | |
465edf35 | 6058 | but this might catch bugs faster. */ |
a5da44fe | 6059 | mblk->markers[i].u_marker.type = Lisp_Misc_Free; |
465edf35 KH |
6060 | mblk->markers[i].u_free.chain = marker_free_list; |
6061 | marker_free_list = &mblk->markers[i]; | |
6ca94ac9 | 6062 | this_free++; |
465edf35 KH |
6063 | } |
6064 | else | |
6065 | { | |
6066 | num_used++; | |
2336fe58 | 6067 | mblk->markers[i].u_marker.gcmarkbit = 0; |
465edf35 KH |
6068 | } |
6069 | } | |
7146af97 | 6070 | lim = MARKER_BLOCK_SIZE; |
6ca94ac9 KH |
6071 | /* If this block contains only free markers and we have already |
6072 | seen more than two blocks worth of free markers then deallocate | |
6073 | this block. */ | |
6feef451 | 6074 | if (this_free == MARKER_BLOCK_SIZE && num_free > MARKER_BLOCK_SIZE) |
6ca94ac9 | 6075 | { |
6ca94ac9 KH |
6076 | *mprev = mblk->next; |
6077 | /* Unhook from the free list. */ | |
6078 | marker_free_list = mblk->markers[0].u_free.chain; | |
c37adf23 | 6079 | lisp_free (mblk); |
c8099634 | 6080 | n_marker_blocks--; |
6ca94ac9 KH |
6081 | } |
6082 | else | |
6feef451 AS |
6083 | { |
6084 | num_free += this_free; | |
6085 | mprev = &mblk->next; | |
6086 | } | |
7146af97 JB |
6087 | } |
6088 | ||
6089 | total_markers = num_used; | |
6090 | total_free_markers = num_free; | |
6091 | } | |
6092 | ||
6093 | /* Free all unmarked buffers */ | |
6094 | { | |
6095 | register struct buffer *buffer = all_buffers, *prev = 0, *next; | |
6096 | ||
6097 | while (buffer) | |
3ef06d12 | 6098 | if (!VECTOR_MARKED_P (buffer)) |
7146af97 JB |
6099 | { |
6100 | if (prev) | |
6101 | prev->next = buffer->next; | |
6102 | else | |
6103 | all_buffers = buffer->next; | |
6104 | next = buffer->next; | |
34400008 | 6105 | lisp_free (buffer); |
7146af97 JB |
6106 | buffer = next; |
6107 | } | |
6108 | else | |
6109 | { | |
3ef06d12 | 6110 | VECTOR_UNMARK (buffer); |
30e3190a | 6111 | UNMARK_BALANCE_INTERVALS (BUF_INTERVALS (buffer)); |
7146af97 JB |
6112 | prev = buffer, buffer = buffer->next; |
6113 | } | |
6114 | } | |
6115 | ||
7146af97 JB |
6116 | /* Free all unmarked vectors */ |
6117 | { | |
6118 | register struct Lisp_Vector *vector = all_vectors, *prev = 0, *next; | |
6119 | total_vector_size = 0; | |
6120 | ||
6121 | while (vector) | |
3ef06d12 | 6122 | if (!VECTOR_MARKED_P (vector)) |
7146af97 JB |
6123 | { |
6124 | if (prev) | |
6125 | prev->next = vector->next; | |
6126 | else | |
6127 | all_vectors = vector->next; | |
6128 | next = vector->next; | |
c8099634 RS |
6129 | lisp_free (vector); |
6130 | n_vectors--; | |
7146af97 | 6131 | vector = next; |
41c28a37 | 6132 | |
7146af97 JB |
6133 | } |
6134 | else | |
6135 | { | |
3ef06d12 | 6136 | VECTOR_UNMARK (vector); |
fa05e253 RS |
6137 | if (vector->size & PSEUDOVECTOR_FLAG) |
6138 | total_vector_size += (PSEUDOVECTOR_SIZE_MASK & vector->size); | |
6139 | else | |
6140 | total_vector_size += vector->size; | |
7146af97 JB |
6141 | prev = vector, vector = vector->next; |
6142 | } | |
6143 | } | |
177c0ea7 | 6144 | |
676a7251 GM |
6145 | #ifdef GC_CHECK_STRING_BYTES |
6146 | if (!noninteractive) | |
6147 | check_string_bytes (1); | |
6148 | #endif | |
7146af97 | 6149 | } |
7146af97 | 6150 | |
7146af97 | 6151 | |
7146af97 | 6152 | |
7146af97 | 6153 | \f |
20d24714 JB |
6154 | /* Debugging aids. */ |
6155 | ||
31ce1c91 | 6156 | DEFUN ("memory-limit", Fmemory_limit, Smemory_limit, 0, 0, 0, |
a6266d23 | 6157 | doc: /* Return the address of the last byte Emacs has allocated, divided by 1024. |
228299fa | 6158 | This may be helpful in debugging Emacs's memory usage. |
7ee72033 MB |
6159 | We divide the value by 1024 to make sure it fits in a Lisp integer. */) |
6160 | () | |
20d24714 JB |
6161 | { |
6162 | Lisp_Object end; | |
6163 | ||
45d12a89 | 6164 | XSETINT (end, (EMACS_INT) sbrk (0) / 1024); |
20d24714 JB |
6165 | |
6166 | return end; | |
6167 | } | |
6168 | ||
310ea200 | 6169 | DEFUN ("memory-use-counts", Fmemory_use_counts, Smemory_use_counts, 0, 0, 0, |
a6266d23 | 6170 | doc: /* Return a list of counters that measure how much consing there has been. |
228299fa GM |
6171 | Each of these counters increments for a certain kind of object. |
6172 | The counters wrap around from the largest positive integer to zero. | |
6173 | Garbage collection does not decrease them. | |
6174 | The elements of the value are as follows: | |
6175 | (CONSES FLOATS VECTOR-CELLS SYMBOLS STRING-CHARS MISCS INTERVALS STRINGS) | |
6176 | All are in units of 1 = one object consed | |
6177 | except for VECTOR-CELLS and STRING-CHARS, which count the total length of | |
6178 | objects consed. | |
6179 | MISCS include overlays, markers, and some internal types. | |
6180 | Frames, windows, buffers, and subprocesses count as vectors | |
7ee72033 MB |
6181 | (but the contents of a buffer's text do not count here). */) |
6182 | () | |
310ea200 | 6183 | { |
2e471eb5 | 6184 | Lisp_Object consed[8]; |
310ea200 | 6185 | |
78e985eb GM |
6186 | consed[0] = make_number (min (MOST_POSITIVE_FIXNUM, cons_cells_consed)); |
6187 | consed[1] = make_number (min (MOST_POSITIVE_FIXNUM, floats_consed)); | |
6188 | consed[2] = make_number (min (MOST_POSITIVE_FIXNUM, vector_cells_consed)); | |
6189 | consed[3] = make_number (min (MOST_POSITIVE_FIXNUM, symbols_consed)); | |
6190 | consed[4] = make_number (min (MOST_POSITIVE_FIXNUM, string_chars_consed)); | |
6191 | consed[5] = make_number (min (MOST_POSITIVE_FIXNUM, misc_objects_consed)); | |
6192 | consed[6] = make_number (min (MOST_POSITIVE_FIXNUM, intervals_consed)); | |
6193 | consed[7] = make_number (min (MOST_POSITIVE_FIXNUM, strings_consed)); | |
310ea200 | 6194 | |
2e471eb5 | 6195 | return Flist (8, consed); |
310ea200 | 6196 | } |
e0b8c689 KR |
6197 | |
6198 | int suppress_checking; | |
6199 | void | |
6200 | die (msg, file, line) | |
6201 | const char *msg; | |
6202 | const char *file; | |
6203 | int line; | |
6204 | { | |
6205 | fprintf (stderr, "\r\nEmacs fatal error: %s:%d: %s\r\n", | |
6206 | file, line, msg); | |
6207 | abort (); | |
6208 | } | |
20d24714 | 6209 | \f |
7146af97 JB |
6210 | /* Initialization */ |
6211 | ||
dfcf069d | 6212 | void |
7146af97 JB |
6213 | init_alloc_once () |
6214 | { | |
6215 | /* Used to do Vpurify_flag = Qt here, but Qt isn't set up yet! */ | |
9e713715 GM |
6216 | purebeg = PUREBEG; |
6217 | pure_size = PURESIZE; | |
1f0b3fd2 | 6218 | pure_bytes_used = 0; |
9e713715 GM |
6219 | pure_bytes_used_before_overflow = 0; |
6220 | ||
ab6780cd SM |
6221 | /* Initialize the list of free aligned blocks. */ |
6222 | free_ablock = NULL; | |
6223 | ||
877935b1 | 6224 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
34400008 GM |
6225 | mem_init (); |
6226 | Vdead = make_pure_string ("DEAD", 4, 4, 0); | |
6227 | #endif | |
9e713715 | 6228 | |
7146af97 JB |
6229 | all_vectors = 0; |
6230 | ignore_warnings = 1; | |
d1658221 RS |
6231 | #ifdef DOUG_LEA_MALLOC |
6232 | mallopt (M_TRIM_THRESHOLD, 128*1024); /* trim threshold */ | |
6233 | mallopt (M_MMAP_THRESHOLD, 64*1024); /* mmap threshold */ | |
81d492d5 | 6234 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); /* max. number of mmap'ed areas */ |
d1658221 | 6235 | #endif |
7146af97 JB |
6236 | init_strings (); |
6237 | init_cons (); | |
6238 | init_symbol (); | |
6239 | init_marker (); | |
7146af97 | 6240 | init_float (); |
34400008 | 6241 | init_intervals (); |
d5e35230 | 6242 | |
276cbe5a RS |
6243 | #ifdef REL_ALLOC |
6244 | malloc_hysteresis = 32; | |
6245 | #else | |
6246 | malloc_hysteresis = 0; | |
6247 | #endif | |
6248 | ||
24d8a105 | 6249 | refill_memory_reserve (); |
276cbe5a | 6250 | |
7146af97 JB |
6251 | ignore_warnings = 0; |
6252 | gcprolist = 0; | |
630686c8 | 6253 | byte_stack_list = 0; |
7146af97 JB |
6254 | staticidx = 0; |
6255 | consing_since_gc = 0; | |
7d179cea | 6256 | gc_cons_threshold = 100000 * sizeof (Lisp_Object); |
974aae61 RS |
6257 | gc_relative_threshold = 0; |
6258 | ||
7146af97 JB |
6259 | #ifdef VIRT_ADDR_VARIES |
6260 | malloc_sbrk_unused = 1<<22; /* A large number */ | |
6261 | malloc_sbrk_used = 100000; /* as reasonable as any number */ | |
6262 | #endif /* VIRT_ADDR_VARIES */ | |
6263 | } | |
6264 | ||
dfcf069d | 6265 | void |
7146af97 JB |
6266 | init_alloc () |
6267 | { | |
6268 | gcprolist = 0; | |
630686c8 | 6269 | byte_stack_list = 0; |
182ff242 GM |
6270 | #if GC_MARK_STACK |
6271 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
6272 | setjmp_tested_p = longjmps_done = 0; | |
6273 | #endif | |
6274 | #endif | |
2c5bd608 DL |
6275 | Vgc_elapsed = make_float (0.0); |
6276 | gcs_done = 0; | |
7146af97 JB |
6277 | } |
6278 | ||
6279 | void | |
6280 | syms_of_alloc () | |
6281 | { | |
7ee72033 | 6282 | DEFVAR_INT ("gc-cons-threshold", &gc_cons_threshold, |
a6266d23 | 6283 | doc: /* *Number of bytes of consing between garbage collections. |
228299fa GM |
6284 | Garbage collection can happen automatically once this many bytes have been |
6285 | allocated since the last garbage collection. All data types count. | |
7146af97 | 6286 | |
228299fa | 6287 | Garbage collection happens automatically only when `eval' is called. |
7146af97 | 6288 | |
228299fa | 6289 | By binding this temporarily to a large number, you can effectively |
96f077ad SM |
6290 | prevent garbage collection during a part of the program. |
6291 | See also `gc-cons-percentage'. */); | |
6292 | ||
6293 | DEFVAR_LISP ("gc-cons-percentage", &Vgc_cons_percentage, | |
6294 | doc: /* *Portion of the heap used for allocation. | |
6295 | Garbage collection can happen automatically once this portion of the heap | |
6296 | has been allocated since the last garbage collection. | |
6297 | If this portion is smaller than `gc-cons-threshold', this is ignored. */); | |
6298 | Vgc_cons_percentage = make_float (0.1); | |
0819585c | 6299 | |
7ee72033 | 6300 | DEFVAR_INT ("pure-bytes-used", &pure_bytes_used, |
a6266d23 | 6301 | doc: /* Number of bytes of sharable Lisp data allocated so far. */); |
0819585c | 6302 | |
7ee72033 | 6303 | DEFVAR_INT ("cons-cells-consed", &cons_cells_consed, |
a6266d23 | 6304 | doc: /* Number of cons cells that have been consed so far. */); |
0819585c | 6305 | |
7ee72033 | 6306 | DEFVAR_INT ("floats-consed", &floats_consed, |
a6266d23 | 6307 | doc: /* Number of floats that have been consed so far. */); |
0819585c | 6308 | |
7ee72033 | 6309 | DEFVAR_INT ("vector-cells-consed", &vector_cells_consed, |
a6266d23 | 6310 | doc: /* Number of vector cells that have been consed so far. */); |
0819585c | 6311 | |
7ee72033 | 6312 | DEFVAR_INT ("symbols-consed", &symbols_consed, |
a6266d23 | 6313 | doc: /* Number of symbols that have been consed so far. */); |
0819585c | 6314 | |
7ee72033 | 6315 | DEFVAR_INT ("string-chars-consed", &string_chars_consed, |
a6266d23 | 6316 | doc: /* Number of string characters that have been consed so far. */); |
0819585c | 6317 | |
7ee72033 | 6318 | DEFVAR_INT ("misc-objects-consed", &misc_objects_consed, |
a6266d23 | 6319 | doc: /* Number of miscellaneous objects that have been consed so far. */); |
2e471eb5 | 6320 | |
7ee72033 | 6321 | DEFVAR_INT ("intervals-consed", &intervals_consed, |
a6266d23 | 6322 | doc: /* Number of intervals that have been consed so far. */); |
7146af97 | 6323 | |
7ee72033 | 6324 | DEFVAR_INT ("strings-consed", &strings_consed, |
a6266d23 | 6325 | doc: /* Number of strings that have been consed so far. */); |
228299fa | 6326 | |
7ee72033 | 6327 | DEFVAR_LISP ("purify-flag", &Vpurify_flag, |
a6266d23 | 6328 | doc: /* Non-nil means loading Lisp code in order to dump an executable. |
228299fa GM |
6329 | This means that certain objects should be allocated in shared (pure) space. */); |
6330 | ||
7ee72033 | 6331 | DEFVAR_BOOL ("garbage-collection-messages", &garbage_collection_messages, |
a6266d23 | 6332 | doc: /* Non-nil means display messages at start and end of garbage collection. */); |
299585ee RS |
6333 | garbage_collection_messages = 0; |
6334 | ||
7ee72033 | 6335 | DEFVAR_LISP ("post-gc-hook", &Vpost_gc_hook, |
a6266d23 | 6336 | doc: /* Hook run after garbage collection has finished. */); |
9e713715 GM |
6337 | Vpost_gc_hook = Qnil; |
6338 | Qpost_gc_hook = intern ("post-gc-hook"); | |
6339 | staticpro (&Qpost_gc_hook); | |
6340 | ||
74a54b04 RS |
6341 | DEFVAR_LISP ("memory-signal-data", &Vmemory_signal_data, |
6342 | doc: /* Precomputed `signal' argument for memory-full error. */); | |
bcb61d60 KH |
6343 | /* We build this in advance because if we wait until we need it, we might |
6344 | not be able to allocate the memory to hold it. */ | |
74a54b04 RS |
6345 | Vmemory_signal_data |
6346 | = list2 (Qerror, | |
6347 | build_string ("Memory exhausted--use M-x save-some-buffers then exit and restart Emacs")); | |
6348 | ||
6349 | DEFVAR_LISP ("memory-full", &Vmemory_full, | |
24d8a105 | 6350 | doc: /* Non-nil means Emacs cannot get much more Lisp memory. */); |
74a54b04 | 6351 | Vmemory_full = Qnil; |
bcb61d60 | 6352 | |
e8197642 RS |
6353 | staticpro (&Qgc_cons_threshold); |
6354 | Qgc_cons_threshold = intern ("gc-cons-threshold"); | |
6355 | ||
a59de17b RS |
6356 | staticpro (&Qchar_table_extra_slots); |
6357 | Qchar_table_extra_slots = intern ("char-table-extra-slots"); | |
6358 | ||
2c5bd608 DL |
6359 | DEFVAR_LISP ("gc-elapsed", &Vgc_elapsed, |
6360 | doc: /* Accumulated time elapsed in garbage collections. | |
e7415487 | 6361 | The time is in seconds as a floating point value. */); |
2c5bd608 | 6362 | DEFVAR_INT ("gcs-done", &gcs_done, |
e7415487 | 6363 | doc: /* Accumulated number of garbage collections done. */); |
2c5bd608 | 6364 | |
7146af97 JB |
6365 | defsubr (&Scons); |
6366 | defsubr (&Slist); | |
6367 | defsubr (&Svector); | |
6368 | defsubr (&Smake_byte_code); | |
6369 | defsubr (&Smake_list); | |
6370 | defsubr (&Smake_vector); | |
7b07587b | 6371 | defsubr (&Smake_char_table); |
7146af97 | 6372 | defsubr (&Smake_string); |
7b07587b | 6373 | defsubr (&Smake_bool_vector); |
7146af97 JB |
6374 | defsubr (&Smake_symbol); |
6375 | defsubr (&Smake_marker); | |
6376 | defsubr (&Spurecopy); | |
6377 | defsubr (&Sgarbage_collect); | |
20d24714 | 6378 | defsubr (&Smemory_limit); |
310ea200 | 6379 | defsubr (&Smemory_use_counts); |
34400008 GM |
6380 | |
6381 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
6382 | defsubr (&Sgc_status); | |
6383 | #endif | |
7146af97 | 6384 | } |
ab5796a9 MB |
6385 | |
6386 | /* arch-tag: 6695ca10-e3c5-4c2c-8bc3-ed26a7dda857 | |
6387 | (do not change this comment) */ |