Commit | Line | Data |
---|---|---|
7146af97 | 1 | /* Storage allocation and gc for GNU Emacs Lisp interpreter. |
999dd333 | 2 | |
ba318903 | 3 | Copyright (C) 1985-1986, 1988, 1993-1995, 1997-2014 Free Software |
ab422c4d | 4 | Foundation, Inc. |
7146af97 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
7146af97 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
7146af97 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
7146af97 | 20 | |
18160b98 | 21 | #include <config.h> |
f162bcc3 | 22 | |
e9b309ac | 23 | #include <stdio.h> |
ab6780cd | 24 | #include <limits.h> /* For CHAR_BIT. */ |
92939d31 | 25 | |
bc8000ff | 26 | #ifdef ENABLE_CHECKING |
b09cca6a | 27 | #include <signal.h> /* For SIGABRT. */ |
bc8000ff EZ |
28 | #endif |
29 | ||
ae9e757a | 30 | #ifdef HAVE_PTHREAD |
aa477689 JD |
31 | #include <pthread.h> |
32 | #endif | |
33 | ||
7146af97 | 34 | #include "lisp.h" |
ece93c02 | 35 | #include "process.h" |
d5e35230 | 36 | #include "intervals.h" |
4c0be5f4 | 37 | #include "puresize.h" |
e5560ff7 | 38 | #include "character.h" |
7146af97 JB |
39 | #include "buffer.h" |
40 | #include "window.h" | |
2538fae4 | 41 | #include "keyboard.h" |
502b9b64 | 42 | #include "frame.h" |
9ac0d9e0 | 43 | #include "blockinput.h" |
4a729fd8 | 44 | #include "termhooks.h" /* For struct terminal. */ |
d141d701 DA |
45 | #ifdef HAVE_WINDOW_SYSTEM |
46 | #include TERM_HEADER | |
47 | #endif /* HAVE_WINDOW_SYSTEM */ | |
0328b6de | 48 | |
0065d054 | 49 | #include <verify.h> |
608a4502 | 50 | #include <execinfo.h> /* For backtrace. */ |
01ae0fbf | 51 | |
009581fa PE |
52 | #if (defined ENABLE_CHECKING \ |
53 | && defined HAVE_VALGRIND_VALGRIND_H \ | |
54 | && !defined USE_VALGRIND) | |
55 | # define USE_VALGRIND 1 | |
56 | #endif | |
57 | ||
a84683fd DC |
58 | #if USE_VALGRIND |
59 | #include <valgrind/valgrind.h> | |
60 | #include <valgrind/memcheck.h> | |
d160dd0c | 61 | static bool valgrind_p; |
a84683fd DC |
62 | #endif |
63 | ||
52828e02 PE |
64 | /* GC_CHECK_MARKED_OBJECTS means do sanity checks on allocated objects. |
65 | Doable only if GC_MARK_STACK. */ | |
66 | #if ! GC_MARK_STACK | |
67 | # undef GC_CHECK_MARKED_OBJECTS | |
68 | #endif | |
69 | ||
6b61353c | 70 | /* GC_MALLOC_CHECK defined means perform validity checks of malloc'd |
52828e02 PE |
71 | memory. Can do this only if using gmalloc.c and if not checking |
72 | marked objects. */ | |
6b61353c | 73 | |
52828e02 PE |
74 | #if (defined SYSTEM_MALLOC || defined DOUG_LEA_MALLOC \ |
75 | || defined GC_CHECK_MARKED_OBJECTS) | |
6b61353c KH |
76 | #undef GC_MALLOC_CHECK |
77 | #endif | |
78 | ||
bf952fb6 | 79 | #include <unistd.h> |
de7124a7 | 80 | #include <fcntl.h> |
de7124a7 | 81 | |
a411ac43 PE |
82 | #ifdef USE_GTK |
83 | # include "gtkutil.h" | |
84 | #endif | |
69666f77 | 85 | #ifdef WINDOWSNT |
f892cf9c | 86 | #include "w32.h" |
62aba0d4 | 87 | #include "w32heap.h" /* for sbrk */ |
69666f77 EZ |
88 | #endif |
89 | ||
d1658221 | 90 | #ifdef DOUG_LEA_MALLOC |
2e471eb5 | 91 | |
d1658221 | 92 | #include <malloc.h> |
81d492d5 | 93 | |
2e471eb5 GM |
94 | /* Specify maximum number of areas to mmap. It would be nice to use a |
95 | value that explicitly means "no limit". */ | |
96 | ||
81d492d5 RS |
97 | #define MMAP_MAX_AREAS 100000000 |
98 | ||
2e471eb5 | 99 | #endif /* not DOUG_LEA_MALLOC */ |
276cbe5a | 100 | |
2e471eb5 GM |
101 | /* Mark, unmark, query mark bit of a Lisp string. S must be a pointer |
102 | to a struct Lisp_String. */ | |
103 | ||
7cdee936 SM |
104 | #define MARK_STRING(S) ((S)->size |= ARRAY_MARK_FLAG) |
105 | #define UNMARK_STRING(S) ((S)->size &= ~ARRAY_MARK_FLAG) | |
b059de99 | 106 | #define STRING_MARKED_P(S) (((S)->size & ARRAY_MARK_FLAG) != 0) |
2e471eb5 | 107 | |
eab3844f PE |
108 | #define VECTOR_MARK(V) ((V)->header.size |= ARRAY_MARK_FLAG) |
109 | #define VECTOR_UNMARK(V) ((V)->header.size &= ~ARRAY_MARK_FLAG) | |
110 | #define VECTOR_MARKED_P(V) (((V)->header.size & ARRAY_MARK_FLAG) != 0) | |
3ef06d12 | 111 | |
0dd6d66d DA |
112 | /* Default value of gc_cons_threshold (see below). */ |
113 | ||
663e2b3f | 114 | #define GC_DEFAULT_THRESHOLD (100000 * word_size) |
0dd6d66d | 115 | |
29208e82 TT |
116 | /* Global variables. */ |
117 | struct emacs_globals globals; | |
118 | ||
2e471eb5 GM |
119 | /* Number of bytes of consing done since the last gc. */ |
120 | ||
dac616ff | 121 | EMACS_INT consing_since_gc; |
7146af97 | 122 | |
974aae61 RS |
123 | /* Similar minimum, computed from Vgc_cons_percentage. */ |
124 | ||
dac616ff | 125 | EMACS_INT gc_relative_threshold; |
310ea200 | 126 | |
24d8a105 RS |
127 | /* Minimum number of bytes of consing since GC before next GC, |
128 | when memory is full. */ | |
129 | ||
dac616ff | 130 | EMACS_INT memory_full_cons_threshold; |
24d8a105 | 131 | |
fce31d69 | 132 | /* True during GC. */ |
2e471eb5 | 133 | |
fce31d69 | 134 | bool gc_in_progress; |
7146af97 | 135 | |
fce31d69 | 136 | /* True means abort if try to GC. |
3de0effb RS |
137 | This is for code which is written on the assumption that |
138 | no GC will happen, so as to verify that assumption. */ | |
139 | ||
fce31d69 | 140 | bool abort_on_gc; |
3de0effb | 141 | |
34400008 GM |
142 | /* Number of live and free conses etc. */ |
143 | ||
3ab6e069 | 144 | static EMACS_INT total_conses, total_markers, total_symbols, total_buffers; |
c0c5c8ae | 145 | static EMACS_INT total_free_conses, total_free_markers, total_free_symbols; |
3ab6e069 | 146 | static EMACS_INT total_free_floats, total_floats; |
fd27a537 | 147 | |
2e471eb5 | 148 | /* Points to memory space allocated as "spare", to be freed if we run |
24d8a105 RS |
149 | out of memory. We keep one large block, four cons-blocks, and |
150 | two string blocks. */ | |
2e471eb5 | 151 | |
d3d47262 | 152 | static char *spare_memory[7]; |
276cbe5a | 153 | |
2b6148e4 PE |
154 | /* Amount of spare memory to keep in large reserve block, or to see |
155 | whether this much is available when malloc fails on a larger request. */ | |
2e471eb5 | 156 | |
276cbe5a | 157 | #define SPARE_MEMORY (1 << 14) |
4d09bcf6 | 158 | |
1b8950e5 RS |
159 | /* Initialize it to a nonzero value to force it into data space |
160 | (rather than bss space). That way unexec will remap it into text | |
161 | space (pure), on some systems. We have not implemented the | |
162 | remapping on more recent systems because this is less important | |
163 | nowadays than in the days of small memories and timesharing. */ | |
2e471eb5 | 164 | |
2c4685ee | 165 | EMACS_INT pure[(PURESIZE + sizeof (EMACS_INT) - 1) / sizeof (EMACS_INT)] = {1,}; |
7146af97 | 166 | #define PUREBEG (char *) pure |
2e471eb5 | 167 | |
9e713715 | 168 | /* Pointer to the pure area, and its size. */ |
2e471eb5 | 169 | |
9e713715 | 170 | static char *purebeg; |
903fe15d | 171 | static ptrdiff_t pure_size; |
9e713715 GM |
172 | |
173 | /* Number of bytes of pure storage used before pure storage overflowed. | |
174 | If this is non-zero, this implies that an overflow occurred. */ | |
175 | ||
903fe15d | 176 | static ptrdiff_t pure_bytes_used_before_overflow; |
7146af97 | 177 | |
fce31d69 | 178 | /* True if P points into pure space. */ |
34400008 GM |
179 | |
180 | #define PURE_POINTER_P(P) \ | |
6a0bf43d | 181 | ((uintptr_t) (P) - (uintptr_t) purebeg <= pure_size) |
34400008 | 182 | |
fecbd8ff | 183 | /* Index in pure at which next pure Lisp object will be allocated.. */ |
e5bc14d4 | 184 | |
d311d28c | 185 | static ptrdiff_t pure_bytes_used_lisp; |
e5bc14d4 YM |
186 | |
187 | /* Number of bytes allocated for non-Lisp objects in pure storage. */ | |
188 | ||
d311d28c | 189 | static ptrdiff_t pure_bytes_used_non_lisp; |
e5bc14d4 | 190 | |
2e471eb5 GM |
191 | /* If nonzero, this is a warning delivered by malloc and not yet |
192 | displayed. */ | |
193 | ||
a8fe7202 | 194 | const char *pending_malloc_warning; |
7146af97 | 195 | |
01ae0fbf DC |
196 | #if 0 /* Normally, pointer sanity only on request... */ |
197 | #ifdef ENABLE_CHECKING | |
198 | #define SUSPICIOUS_OBJECT_CHECKING 1 | |
199 | #endif | |
200 | #endif | |
201 | ||
202 | /* ... but unconditionally use SUSPICIOUS_OBJECT_CHECKING while the GC | |
203 | bug is unresolved. */ | |
204 | #define SUSPICIOUS_OBJECT_CHECKING 1 | |
205 | ||
206 | #ifdef SUSPICIOUS_OBJECT_CHECKING | |
608a4502 PE |
207 | struct suspicious_free_record |
208 | { | |
faa52174 | 209 | void *suspicious_object; |
faa52174 | 210 | void *backtrace[128]; |
01ae0fbf | 211 | }; |
faa52174 | 212 | static void *suspicious_objects[32]; |
01ae0fbf | 213 | static int suspicious_object_index; |
608a4502 | 214 | struct suspicious_free_record suspicious_free_history[64] EXTERNALLY_VISIBLE; |
01ae0fbf DC |
215 | static int suspicious_free_history_index; |
216 | /* Find the first currently-monitored suspicious pointer in range | |
217 | [begin,end) or NULL if no such pointer exists. */ | |
faa52174 PE |
218 | static void *find_suspicious_object_in_range (void *begin, void *end); |
219 | static void detect_suspicious_free (void *ptr); | |
01ae0fbf | 220 | #else |
608a4502 PE |
221 | # define find_suspicious_object_in_range(begin, end) NULL |
222 | # define detect_suspicious_free(ptr) (void) | |
01ae0fbf DC |
223 | #endif |
224 | ||
7146af97 JB |
225 | /* Maximum amount of C stack to save when a GC happens. */ |
226 | ||
227 | #ifndef MAX_SAVE_STACK | |
228 | #define MAX_SAVE_STACK 16000 | |
229 | #endif | |
230 | ||
231 | /* Buffer in which we save a copy of the C stack at each GC. */ | |
232 | ||
dd3f25f7 | 233 | #if MAX_SAVE_STACK > 0 |
d3d47262 | 234 | static char *stack_copy; |
903fe15d | 235 | static ptrdiff_t stack_copy_size; |
e76119d7 PE |
236 | |
237 | /* Copy to DEST a block of memory from SRC of size SIZE bytes, | |
238 | avoiding any address sanitization. */ | |
239 | ||
240 | static void * ATTRIBUTE_NO_SANITIZE_ADDRESS | |
241 | no_sanitize_memcpy (void *dest, void const *src, size_t size) | |
242 | { | |
243 | if (! ADDRESS_SANITIZER) | |
244 | return memcpy (dest, src, size); | |
245 | else | |
246 | { | |
247 | size_t i; | |
248 | char *d = dest; | |
249 | char const *s = src; | |
250 | for (i = 0; i < size; i++) | |
251 | d[i] = s[i]; | |
252 | return dest; | |
253 | } | |
254 | } | |
255 | ||
256 | #endif /* MAX_SAVE_STACK > 0 */ | |
7146af97 | 257 | |
fecbd8ff SM |
258 | static Lisp_Object Qconses; |
259 | static Lisp_Object Qsymbols; | |
260 | static Lisp_Object Qmiscs; | |
261 | static Lisp_Object Qstrings; | |
262 | static Lisp_Object Qvectors; | |
263 | static Lisp_Object Qfloats; | |
264 | static Lisp_Object Qintervals; | |
265 | static Lisp_Object Qbuffers; | |
f8643a6b | 266 | static Lisp_Object Qstring_bytes, Qvector_slots, Qheap; |
955cbe7b | 267 | static Lisp_Object Qgc_cons_threshold; |
3d80c99f | 268 | Lisp_Object Qautomatic_gc; |
955cbe7b | 269 | Lisp_Object Qchar_table_extra_slots; |
e8197642 | 270 | |
9e713715 GM |
271 | /* Hook run after GC has finished. */ |
272 | ||
955cbe7b | 273 | static Lisp_Object Qpost_gc_hook; |
2c5bd608 | 274 | |
f57e2426 | 275 | static void mark_terminals (void); |
f57e2426 | 276 | static void gc_sweep (void); |
72cb32cf | 277 | static Lisp_Object make_pure_vector (ptrdiff_t); |
c752cfa9 | 278 | static void mark_buffer (struct buffer *); |
41c28a37 | 279 | |
69003fd8 PE |
280 | #if !defined REL_ALLOC || defined SYSTEM_MALLOC |
281 | static void refill_memory_reserve (void); | |
282 | #endif | |
f57e2426 J |
283 | static void compact_small_strings (void); |
284 | static void free_large_strings (void); | |
196e41e4 | 285 | extern Lisp_Object which_symbols (Lisp_Object, EMACS_INT) EXTERNALLY_VISIBLE; |
34400008 | 286 | |
914adc42 DA |
287 | /* When scanning the C stack for live Lisp objects, Emacs keeps track of |
288 | what memory allocated via lisp_malloc and lisp_align_malloc is intended | |
289 | for what purpose. This enumeration specifies the type of memory. */ | |
34400008 GM |
290 | |
291 | enum mem_type | |
292 | { | |
293 | MEM_TYPE_NON_LISP, | |
294 | MEM_TYPE_BUFFER, | |
295 | MEM_TYPE_CONS, | |
296 | MEM_TYPE_STRING, | |
297 | MEM_TYPE_MISC, | |
298 | MEM_TYPE_SYMBOL, | |
299 | MEM_TYPE_FLOAT, | |
914adc42 DA |
300 | /* Since all non-bool pseudovectors are small enough to be |
301 | allocated from vector blocks, this memory type denotes | |
302 | large regular vectors and large bool pseudovectors. */ | |
f3372c87 DA |
303 | MEM_TYPE_VECTORLIKE, |
304 | /* Special type to denote vector blocks. */ | |
35aaa1ea DA |
305 | MEM_TYPE_VECTOR_BLOCK, |
306 | /* Special type to denote reserved memory. */ | |
307 | MEM_TYPE_SPARE | |
34400008 GM |
308 | }; |
309 | ||
877935b1 | 310 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
0b378936 | 311 | |
0b378936 GM |
312 | /* A unique object in pure space used to make some Lisp objects |
313 | on free lists recognizable in O(1). */ | |
314 | ||
d3d47262 | 315 | static Lisp_Object Vdead; |
ca78dc43 | 316 | #define DEADP(x) EQ (x, Vdead) |
0b378936 | 317 | |
877935b1 GM |
318 | #ifdef GC_MALLOC_CHECK |
319 | ||
320 | enum mem_type allocated_mem_type; | |
877935b1 GM |
321 | |
322 | #endif /* GC_MALLOC_CHECK */ | |
323 | ||
324 | /* A node in the red-black tree describing allocated memory containing | |
325 | Lisp data. Each such block is recorded with its start and end | |
326 | address when it is allocated, and removed from the tree when it | |
327 | is freed. | |
328 | ||
329 | A red-black tree is a balanced binary tree with the following | |
330 | properties: | |
331 | ||
332 | 1. Every node is either red or black. | |
333 | 2. Every leaf is black. | |
334 | 3. If a node is red, then both of its children are black. | |
335 | 4. Every simple path from a node to a descendant leaf contains | |
336 | the same number of black nodes. | |
337 | 5. The root is always black. | |
338 | ||
339 | When nodes are inserted into the tree, or deleted from the tree, | |
340 | the tree is "fixed" so that these properties are always true. | |
341 | ||
342 | A red-black tree with N internal nodes has height at most 2 | |
343 | log(N+1). Searches, insertions and deletions are done in O(log N). | |
344 | Please see a text book about data structures for a detailed | |
345 | description of red-black trees. Any book worth its salt should | |
346 | describe them. */ | |
347 | ||
348 | struct mem_node | |
349 | { | |
9f7d9210 RS |
350 | /* Children of this node. These pointers are never NULL. When there |
351 | is no child, the value is MEM_NIL, which points to a dummy node. */ | |
352 | struct mem_node *left, *right; | |
353 | ||
354 | /* The parent of this node. In the root node, this is NULL. */ | |
355 | struct mem_node *parent; | |
877935b1 GM |
356 | |
357 | /* Start and end of allocated region. */ | |
358 | void *start, *end; | |
359 | ||
360 | /* Node color. */ | |
361 | enum {MEM_BLACK, MEM_RED} color; | |
177c0ea7 | 362 | |
877935b1 GM |
363 | /* Memory type. */ |
364 | enum mem_type type; | |
365 | }; | |
366 | ||
367 | /* Base address of stack. Set in main. */ | |
368 | ||
369 | Lisp_Object *stack_base; | |
370 | ||
371 | /* Root of the tree describing allocated Lisp memory. */ | |
372 | ||
373 | static struct mem_node *mem_root; | |
374 | ||
ece93c02 GM |
375 | /* Lowest and highest known address in the heap. */ |
376 | ||
377 | static void *min_heap_address, *max_heap_address; | |
378 | ||
877935b1 GM |
379 | /* Sentinel node of the tree. */ |
380 | ||
381 | static struct mem_node mem_z; | |
382 | #define MEM_NIL &mem_z | |
383 | ||
f57e2426 J |
384 | static struct mem_node *mem_insert (void *, void *, enum mem_type); |
385 | static void mem_insert_fixup (struct mem_node *); | |
386 | static void mem_rotate_left (struct mem_node *); | |
387 | static void mem_rotate_right (struct mem_node *); | |
388 | static void mem_delete (struct mem_node *); | |
389 | static void mem_delete_fixup (struct mem_node *); | |
b0ab8123 | 390 | static struct mem_node *mem_find (void *); |
34400008 | 391 | |
877935b1 | 392 | #endif /* GC_MARK_STACK || GC_MALLOC_CHECK */ |
34400008 | 393 | |
ca78dc43 PE |
394 | #ifndef DEADP |
395 | # define DEADP(x) 0 | |
396 | #endif | |
397 | ||
1f0b3fd2 GM |
398 | /* Recording what needs to be marked for gc. */ |
399 | ||
400 | struct gcpro *gcprolist; | |
401 | ||
379b98b1 PE |
402 | /* Addresses of staticpro'd variables. Initialize it to a nonzero |
403 | value; otherwise some compilers put it into BSS. */ | |
1f0b3fd2 | 404 | |
4195afc3 | 405 | enum { NSTATICS = 2048 }; |
d3d47262 | 406 | static Lisp_Object *staticvec[NSTATICS] = {&Vpurify_flag}; |
1f0b3fd2 GM |
407 | |
408 | /* Index of next unused slot in staticvec. */ | |
409 | ||
fff62aa9 | 410 | static int staticidx; |
1f0b3fd2 | 411 | |
261cb4bb | 412 | static void *pure_alloc (size_t, int); |
1f0b3fd2 | 413 | |
df5b4930 PE |
414 | /* Return X rounded to the next multiple of Y. Arguments should not |
415 | have side effects, as they are evaluated more than once. Assume X | |
416 | + Y - 1 does not overflow. Tune for Y being a power of 2. */ | |
1f0b3fd2 | 417 | |
df5b4930 PE |
418 | #define ROUNDUP(x, y) ((y) & ((y) - 1) \ |
419 | ? ((x) + (y) - 1) - ((x) + (y) - 1) % (y) \ | |
420 | : ((x) + (y) - 1) & ~ ((y) - 1)) | |
1f0b3fd2 | 421 | |
df5b4930 PE |
422 | /* Return PTR rounded up to the next multiple of ALIGNMENT. */ |
423 | ||
424 | static void * | |
425 | ALIGN (void *ptr, int alignment) | |
426 | { | |
427 | return (void *) ROUNDUP ((uintptr_t) ptr, alignment); | |
428 | } | |
1f0b3fd2 | 429 | |
84575e67 PE |
430 | static void |
431 | XFLOAT_INIT (Lisp_Object f, double n) | |
432 | { | |
433 | XFLOAT (f)->u.data = n; | |
434 | } | |
ece93c02 | 435 | |
f20b8315 DC |
436 | static bool |
437 | pointers_fit_in_lispobj_p (void) | |
438 | { | |
439 | return (UINTPTR_MAX <= VAL_MAX) || USE_LSB_TAG; | |
440 | } | |
441 | ||
442 | static bool | |
443 | mmap_lisp_allowed_p (void) | |
444 | { | |
445 | /* If we can't store all memory addresses in our lisp objects, it's | |
446 | risky to let the heap use mmap and give us addresses from all | |
447 | over our address space. We also can't use mmap for lisp objects | |
448 | if we might dump: unexec doesn't preserve the contents of mmaped | |
449 | regions. */ | |
450 | return pointers_fit_in_lispobj_p () && !might_dump; | |
451 | } | |
452 | ||
7146af97 | 453 | \f |
34400008 GM |
454 | /************************************************************************ |
455 | Malloc | |
456 | ************************************************************************/ | |
457 | ||
4455ad75 | 458 | /* Function malloc calls this if it finds we are near exhausting storage. */ |
d457598b AS |
459 | |
460 | void | |
a8fe7202 | 461 | malloc_warning (const char *str) |
7146af97 JB |
462 | { |
463 | pending_malloc_warning = str; | |
464 | } | |
465 | ||
34400008 | 466 | |
4455ad75 | 467 | /* Display an already-pending malloc warning. */ |
34400008 | 468 | |
d457598b | 469 | void |
971de7fb | 470 | display_malloc_warning (void) |
7146af97 | 471 | { |
4455ad75 RS |
472 | call3 (intern ("display-warning"), |
473 | intern ("alloc"), | |
474 | build_string (pending_malloc_warning), | |
475 | intern ("emergency")); | |
7146af97 | 476 | pending_malloc_warning = 0; |
7146af97 | 477 | } |
49efed3a | 478 | \f |
276cbe5a RS |
479 | /* Called if we can't allocate relocatable space for a buffer. */ |
480 | ||
481 | void | |
d311d28c | 482 | buffer_memory_full (ptrdiff_t nbytes) |
276cbe5a | 483 | { |
2e471eb5 GM |
484 | /* If buffers use the relocating allocator, no need to free |
485 | spare_memory, because we may have plenty of malloc space left | |
486 | that we could get, and if we don't, the malloc that fails will | |
487 | itself cause spare_memory to be freed. If buffers don't use the | |
488 | relocating allocator, treat this like any other failing | |
489 | malloc. */ | |
276cbe5a RS |
490 | |
491 | #ifndef REL_ALLOC | |
531b0165 | 492 | memory_full (nbytes); |
d9df6f40 | 493 | #else |
2e471eb5 GM |
494 | /* This used to call error, but if we've run out of memory, we could |
495 | get infinite recursion trying to build the string. */ | |
9b306d37 | 496 | xsignal (Qnil, Vmemory_signal_data); |
d9df6f40 | 497 | #endif |
7146af97 JB |
498 | } |
499 | ||
f3372c87 DA |
500 | /* A common multiple of the positive integers A and B. Ideally this |
501 | would be the least common multiple, but there's no way to do that | |
502 | as a constant expression in C, so do the best that we can easily do. */ | |
503 | #define COMMON_MULTIPLE(a, b) \ | |
504 | ((a) % (b) == 0 ? (a) : (b) % (a) == 0 ? (b) : (a) * (b)) | |
34400008 | 505 | |
c9d624c6 | 506 | #ifndef XMALLOC_OVERRUN_CHECK |
903fe15d | 507 | #define XMALLOC_OVERRUN_CHECK_OVERHEAD 0 |
c9d624c6 | 508 | #else |
212f33f1 | 509 | |
903fe15d PE |
510 | /* Check for overrun in malloc'ed buffers by wrapping a header and trailer |
511 | around each block. | |
bdbed949 | 512 | |
f701dc2a PE |
513 | The header consists of XMALLOC_OVERRUN_CHECK_SIZE fixed bytes |
514 | followed by XMALLOC_OVERRUN_SIZE_SIZE bytes containing the original | |
515 | block size in little-endian order. The trailer consists of | |
516 | XMALLOC_OVERRUN_CHECK_SIZE fixed bytes. | |
bdbed949 KS |
517 | |
518 | The header is used to detect whether this block has been allocated | |
f701dc2a PE |
519 | through these functions, as some low-level libc functions may |
520 | bypass the malloc hooks. */ | |
bdbed949 | 521 | |
212f33f1 | 522 | #define XMALLOC_OVERRUN_CHECK_SIZE 16 |
903fe15d | 523 | #define XMALLOC_OVERRUN_CHECK_OVERHEAD \ |
38532ce6 PE |
524 | (2 * XMALLOC_OVERRUN_CHECK_SIZE + XMALLOC_OVERRUN_SIZE_SIZE) |
525 | ||
526 | /* Define XMALLOC_OVERRUN_SIZE_SIZE so that (1) it's large enough to | |
f701dc2a PE |
527 | hold a size_t value and (2) the header size is a multiple of the |
528 | alignment that Emacs needs for C types and for USE_LSB_TAG. */ | |
529 | #define XMALLOC_BASE_ALIGNMENT \ | |
e32a5799 | 530 | alignof (union { long double d; intmax_t i; void *p; }) |
f3372c87 | 531 | |
bfe3e0a2 | 532 | #if USE_LSB_TAG |
f701dc2a | 533 | # define XMALLOC_HEADER_ALIGNMENT \ |
2b90362b | 534 | COMMON_MULTIPLE (GCALIGNMENT, XMALLOC_BASE_ALIGNMENT) |
38532ce6 PE |
535 | #else |
536 | # define XMALLOC_HEADER_ALIGNMENT XMALLOC_BASE_ALIGNMENT | |
537 | #endif | |
538 | #define XMALLOC_OVERRUN_SIZE_SIZE \ | |
f701dc2a PE |
539 | (((XMALLOC_OVERRUN_CHECK_SIZE + sizeof (size_t) \ |
540 | + XMALLOC_HEADER_ALIGNMENT - 1) \ | |
541 | / XMALLOC_HEADER_ALIGNMENT * XMALLOC_HEADER_ALIGNMENT) \ | |
542 | - XMALLOC_OVERRUN_CHECK_SIZE) | |
bdbed949 | 543 | |
903fe15d PE |
544 | static char const xmalloc_overrun_check_header[XMALLOC_OVERRUN_CHECK_SIZE] = |
545 | { '\x9a', '\x9b', '\xae', '\xaf', | |
546 | '\xbf', '\xbe', '\xce', '\xcf', | |
547 | '\xea', '\xeb', '\xec', '\xed', | |
548 | '\xdf', '\xde', '\x9c', '\x9d' }; | |
212f33f1 | 549 | |
903fe15d PE |
550 | static char const xmalloc_overrun_check_trailer[XMALLOC_OVERRUN_CHECK_SIZE] = |
551 | { '\xaa', '\xab', '\xac', '\xad', | |
552 | '\xba', '\xbb', '\xbc', '\xbd', | |
553 | '\xca', '\xcb', '\xcc', '\xcd', | |
554 | '\xda', '\xdb', '\xdc', '\xdd' }; | |
212f33f1 | 555 | |
903fe15d | 556 | /* Insert and extract the block size in the header. */ |
bdbed949 | 557 | |
903fe15d PE |
558 | static void |
559 | xmalloc_put_size (unsigned char *ptr, size_t size) | |
560 | { | |
561 | int i; | |
38532ce6 | 562 | for (i = 0; i < XMALLOC_OVERRUN_SIZE_SIZE; i++) |
903fe15d | 563 | { |
38532ce6 | 564 | *--ptr = size & ((1 << CHAR_BIT) - 1); |
903fe15d PE |
565 | size >>= CHAR_BIT; |
566 | } | |
567 | } | |
bdbed949 | 568 | |
903fe15d PE |
569 | static size_t |
570 | xmalloc_get_size (unsigned char *ptr) | |
571 | { | |
572 | size_t size = 0; | |
573 | int i; | |
38532ce6 PE |
574 | ptr -= XMALLOC_OVERRUN_SIZE_SIZE; |
575 | for (i = 0; i < XMALLOC_OVERRUN_SIZE_SIZE; i++) | |
903fe15d PE |
576 | { |
577 | size <<= CHAR_BIT; | |
578 | size += *ptr++; | |
579 | } | |
580 | return size; | |
581 | } | |
bdbed949 KS |
582 | |
583 | ||
584 | /* Like malloc, but wraps allocated block with header and trailer. */ | |
585 | ||
261cb4bb | 586 | static void * |
e7974947 | 587 | overrun_check_malloc (size_t size) |
212f33f1 | 588 | { |
bdbed949 | 589 | register unsigned char *val; |
0caaedb1 | 590 | if (SIZE_MAX - XMALLOC_OVERRUN_CHECK_OVERHEAD < size) |
1088b922 | 591 | emacs_abort (); |
212f33f1 | 592 | |
0caaedb1 PE |
593 | val = malloc (size + XMALLOC_OVERRUN_CHECK_OVERHEAD); |
594 | if (val) | |
212f33f1 | 595 | { |
903fe15d | 596 | memcpy (val, xmalloc_overrun_check_header, XMALLOC_OVERRUN_CHECK_SIZE); |
38532ce6 | 597 | val += XMALLOC_OVERRUN_CHECK_SIZE + XMALLOC_OVERRUN_SIZE_SIZE; |
903fe15d | 598 | xmalloc_put_size (val, size); |
72af86bd AS |
599 | memcpy (val + size, xmalloc_overrun_check_trailer, |
600 | XMALLOC_OVERRUN_CHECK_SIZE); | |
212f33f1 | 601 | } |
261cb4bb | 602 | return val; |
212f33f1 KS |
603 | } |
604 | ||
bdbed949 KS |
605 | |
606 | /* Like realloc, but checks old block for overrun, and wraps new block | |
607 | with header and trailer. */ | |
608 | ||
261cb4bb PE |
609 | static void * |
610 | overrun_check_realloc (void *block, size_t size) | |
212f33f1 | 611 | { |
e7974947 | 612 | register unsigned char *val = (unsigned char *) block; |
0caaedb1 | 613 | if (SIZE_MAX - XMALLOC_OVERRUN_CHECK_OVERHEAD < size) |
1088b922 | 614 | emacs_abort (); |
212f33f1 KS |
615 | |
616 | if (val | |
72af86bd | 617 | && memcmp (xmalloc_overrun_check_header, |
38532ce6 | 618 | val - XMALLOC_OVERRUN_CHECK_SIZE - XMALLOC_OVERRUN_SIZE_SIZE, |
903fe15d | 619 | XMALLOC_OVERRUN_CHECK_SIZE) == 0) |
212f33f1 | 620 | { |
903fe15d | 621 | size_t osize = xmalloc_get_size (val); |
72af86bd AS |
622 | if (memcmp (xmalloc_overrun_check_trailer, val + osize, |
623 | XMALLOC_OVERRUN_CHECK_SIZE)) | |
1088b922 | 624 | emacs_abort (); |
72af86bd | 625 | memset (val + osize, 0, XMALLOC_OVERRUN_CHECK_SIZE); |
38532ce6 PE |
626 | val -= XMALLOC_OVERRUN_CHECK_SIZE + XMALLOC_OVERRUN_SIZE_SIZE; |
627 | memset (val, 0, XMALLOC_OVERRUN_CHECK_SIZE + XMALLOC_OVERRUN_SIZE_SIZE); | |
212f33f1 KS |
628 | } |
629 | ||
0caaedb1 | 630 | val = realloc (val, size + XMALLOC_OVERRUN_CHECK_OVERHEAD); |
212f33f1 | 631 | |
0caaedb1 | 632 | if (val) |
212f33f1 | 633 | { |
903fe15d | 634 | memcpy (val, xmalloc_overrun_check_header, XMALLOC_OVERRUN_CHECK_SIZE); |
38532ce6 | 635 | val += XMALLOC_OVERRUN_CHECK_SIZE + XMALLOC_OVERRUN_SIZE_SIZE; |
903fe15d | 636 | xmalloc_put_size (val, size); |
72af86bd AS |
637 | memcpy (val + size, xmalloc_overrun_check_trailer, |
638 | XMALLOC_OVERRUN_CHECK_SIZE); | |
212f33f1 | 639 | } |
261cb4bb | 640 | return val; |
212f33f1 KS |
641 | } |
642 | ||
bdbed949 KS |
643 | /* Like free, but checks block for overrun. */ |
644 | ||
2538aa2f | 645 | static void |
261cb4bb | 646 | overrun_check_free (void *block) |
212f33f1 | 647 | { |
e7974947 | 648 | unsigned char *val = (unsigned char *) block; |
212f33f1 KS |
649 | |
650 | if (val | |
72af86bd | 651 | && memcmp (xmalloc_overrun_check_header, |
38532ce6 | 652 | val - XMALLOC_OVERRUN_CHECK_SIZE - XMALLOC_OVERRUN_SIZE_SIZE, |
903fe15d | 653 | XMALLOC_OVERRUN_CHECK_SIZE) == 0) |
212f33f1 | 654 | { |
903fe15d | 655 | size_t osize = xmalloc_get_size (val); |
72af86bd AS |
656 | if (memcmp (xmalloc_overrun_check_trailer, val + osize, |
657 | XMALLOC_OVERRUN_CHECK_SIZE)) | |
1088b922 | 658 | emacs_abort (); |
454d7973 | 659 | #ifdef XMALLOC_CLEAR_FREE_MEMORY |
38532ce6 | 660 | val -= XMALLOC_OVERRUN_CHECK_SIZE + XMALLOC_OVERRUN_SIZE_SIZE; |
903fe15d | 661 | memset (val, 0xff, osize + XMALLOC_OVERRUN_CHECK_OVERHEAD); |
454d7973 | 662 | #else |
72af86bd | 663 | memset (val + osize, 0, XMALLOC_OVERRUN_CHECK_SIZE); |
38532ce6 PE |
664 | val -= XMALLOC_OVERRUN_CHECK_SIZE + XMALLOC_OVERRUN_SIZE_SIZE; |
665 | memset (val, 0, XMALLOC_OVERRUN_CHECK_SIZE + XMALLOC_OVERRUN_SIZE_SIZE); | |
454d7973 | 666 | #endif |
212f33f1 KS |
667 | } |
668 | ||
669 | free (val); | |
670 | } | |
671 | ||
672 | #undef malloc | |
673 | #undef realloc | |
674 | #undef free | |
675 | #define malloc overrun_check_malloc | |
676 | #define realloc overrun_check_realloc | |
677 | #define free overrun_check_free | |
678 | #endif | |
679 | ||
0caaedb1 PE |
680 | /* If compiled with XMALLOC_BLOCK_INPUT_CHECK, define a symbol |
681 | BLOCK_INPUT_IN_MEMORY_ALLOCATORS that is visible to the debugger. | |
682 | If that variable is set, block input while in one of Emacs's memory | |
683 | allocation functions. There should be no need for this debugging | |
684 | option, since signal handlers do not allocate memory, but Emacs | |
685 | formerly allocated memory in signal handlers and this compile-time | |
686 | option remains as a way to help debug the issue should it rear its | |
687 | ugly head again. */ | |
688 | #ifdef XMALLOC_BLOCK_INPUT_CHECK | |
689 | bool block_input_in_memory_allocators EXTERNALLY_VISIBLE; | |
690 | static void | |
691 | malloc_block_input (void) | |
692 | { | |
693 | if (block_input_in_memory_allocators) | |
4d7e6e51 | 694 | block_input (); |
0caaedb1 PE |
695 | } |
696 | static void | |
697 | malloc_unblock_input (void) | |
698 | { | |
699 | if (block_input_in_memory_allocators) | |
4d7e6e51 | 700 | unblock_input (); |
0caaedb1 PE |
701 | } |
702 | # define MALLOC_BLOCK_INPUT malloc_block_input () | |
703 | # define MALLOC_UNBLOCK_INPUT malloc_unblock_input () | |
dafc79fa | 704 | #else |
0caaedb1 PE |
705 | # define MALLOC_BLOCK_INPUT ((void) 0) |
706 | # define MALLOC_UNBLOCK_INPUT ((void) 0) | |
dafc79fa | 707 | #endif |
bdbed949 | 708 | |
3a880af4 SM |
709 | #define MALLOC_PROBE(size) \ |
710 | do { \ | |
711 | if (profiler_memory_running) \ | |
712 | malloc_probe (size); \ | |
713 | } while (0) | |
714 | ||
715 | ||
34400008 | 716 | /* Like malloc but check for no memory and block interrupt input.. */ |
7146af97 | 717 | |
261cb4bb | 718 | void * |
971de7fb | 719 | xmalloc (size_t size) |
7146af97 | 720 | { |
261cb4bb | 721 | void *val; |
7146af97 | 722 | |
dafc79fa | 723 | MALLOC_BLOCK_INPUT; |
261cb4bb | 724 | val = malloc (size); |
dafc79fa | 725 | MALLOC_UNBLOCK_INPUT; |
7146af97 | 726 | |
2e471eb5 | 727 | if (!val && size) |
531b0165 | 728 | memory_full (size); |
c2d7786e | 729 | MALLOC_PROBE (size); |
7146af97 JB |
730 | return val; |
731 | } | |
732 | ||
23f86fce DA |
733 | /* Like the above, but zeroes out the memory just allocated. */ |
734 | ||
735 | void * | |
736 | xzalloc (size_t size) | |
737 | { | |
738 | void *val; | |
739 | ||
740 | MALLOC_BLOCK_INPUT; | |
741 | val = malloc (size); | |
742 | MALLOC_UNBLOCK_INPUT; | |
743 | ||
744 | if (!val && size) | |
745 | memory_full (size); | |
746 | memset (val, 0, size); | |
c2d7786e | 747 | MALLOC_PROBE (size); |
23f86fce DA |
748 | return val; |
749 | } | |
34400008 GM |
750 | |
751 | /* Like realloc but check for no memory and block interrupt input.. */ | |
752 | ||
261cb4bb PE |
753 | void * |
754 | xrealloc (void *block, size_t size) | |
7146af97 | 755 | { |
261cb4bb | 756 | void *val; |
7146af97 | 757 | |
dafc79fa | 758 | MALLOC_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) | |
261cb4bb | 762 | val = malloc (size); |
f048679d | 763 | else |
261cb4bb | 764 | val = realloc (block, size); |
dafc79fa | 765 | MALLOC_UNBLOCK_INPUT; |
7146af97 | 766 | |
531b0165 PE |
767 | if (!val && size) |
768 | memory_full (size); | |
c2d7786e | 769 | MALLOC_PROBE (size); |
7146af97 JB |
770 | return val; |
771 | } | |
9ac0d9e0 | 772 | |
34400008 | 773 | |
005ca5c7 | 774 | /* Like free but block interrupt input. */ |
34400008 | 775 | |
9ac0d9e0 | 776 | void |
261cb4bb | 777 | xfree (void *block) |
9ac0d9e0 | 778 | { |
70fdbb46 JM |
779 | if (!block) |
780 | return; | |
dafc79fa | 781 | MALLOC_BLOCK_INPUT; |
9ac0d9e0 | 782 | free (block); |
dafc79fa | 783 | MALLOC_UNBLOCK_INPUT; |
24d8a105 | 784 | /* We don't call refill_memory_reserve here |
0caaedb1 | 785 | because in practice the call in r_alloc_free seems to suffice. */ |
9ac0d9e0 JB |
786 | } |
787 | ||
c8099634 | 788 | |
0065d054 PE |
789 | /* Other parts of Emacs pass large int values to allocator functions |
790 | expecting ptrdiff_t. This is portable in practice, but check it to | |
791 | be safe. */ | |
792 | verify (INT_MAX <= PTRDIFF_MAX); | |
793 | ||
794 | ||
795 | /* Allocate an array of NITEMS items, each of size ITEM_SIZE. | |
796 | Signal an error on memory exhaustion, and block interrupt input. */ | |
797 | ||
798 | void * | |
799 | xnmalloc (ptrdiff_t nitems, ptrdiff_t item_size) | |
800 | { | |
a54e2c05 | 801 | eassert (0 <= nitems && 0 < item_size); |
0065d054 PE |
802 | if (min (PTRDIFF_MAX, SIZE_MAX) / item_size < nitems) |
803 | memory_full (SIZE_MAX); | |
804 | return xmalloc (nitems * item_size); | |
805 | } | |
806 | ||
807 | ||
808 | /* Reallocate an array PA to make it of NITEMS items, each of size ITEM_SIZE. | |
809 | Signal an error on memory exhaustion, and block interrupt input. */ | |
810 | ||
811 | void * | |
812 | xnrealloc (void *pa, ptrdiff_t nitems, ptrdiff_t item_size) | |
813 | { | |
a54e2c05 | 814 | eassert (0 <= nitems && 0 < item_size); |
0065d054 PE |
815 | if (min (PTRDIFF_MAX, SIZE_MAX) / item_size < nitems) |
816 | memory_full (SIZE_MAX); | |
817 | return xrealloc (pa, nitems * item_size); | |
818 | } | |
819 | ||
820 | ||
821 | /* Grow PA, which points to an array of *NITEMS items, and return the | |
822 | location of the reallocated array, updating *NITEMS to reflect its | |
823 | new size. The new array will contain at least NITEMS_INCR_MIN more | |
824 | items, but will not contain more than NITEMS_MAX items total. | |
825 | ITEM_SIZE is the size of each item, in bytes. | |
826 | ||
827 | ITEM_SIZE and NITEMS_INCR_MIN must be positive. *NITEMS must be | |
828 | nonnegative. If NITEMS_MAX is -1, it is treated as if it were | |
829 | infinity. | |
830 | ||
831 | If PA is null, then allocate a new array instead of reallocating | |
2dd2e622 | 832 | the old one. |
0065d054 PE |
833 | |
834 | Block interrupt input as needed. If memory exhaustion occurs, set | |
835 | *NITEMS to zero if PA is null, and signal an error (i.e., do not | |
2dd2e622 PE |
836 | return). |
837 | ||
838 | Thus, to grow an array A without saving its old contents, do | |
839 | { xfree (A); A = NULL; A = xpalloc (NULL, &AITEMS, ...); }. | |
840 | The A = NULL avoids a dangling pointer if xpalloc exhausts memory | |
841 | and signals an error, and later this code is reexecuted and | |
842 | attempts to free A. */ | |
0065d054 PE |
843 | |
844 | void * | |
845 | xpalloc (void *pa, ptrdiff_t *nitems, ptrdiff_t nitems_incr_min, | |
846 | ptrdiff_t nitems_max, ptrdiff_t item_size) | |
847 | { | |
848 | /* The approximate size to use for initial small allocation | |
849 | requests. This is the largest "small" request for the GNU C | |
850 | library malloc. */ | |
851 | enum { DEFAULT_MXFAST = 64 * sizeof (size_t) / 4 }; | |
852 | ||
853 | /* If the array is tiny, grow it to about (but no greater than) | |
854 | DEFAULT_MXFAST bytes. Otherwise, grow it by about 50%. */ | |
855 | ptrdiff_t n = *nitems; | |
856 | ptrdiff_t tiny_max = DEFAULT_MXFAST / item_size - n; | |
857 | ptrdiff_t half_again = n >> 1; | |
858 | ptrdiff_t incr_estimate = max (tiny_max, half_again); | |
859 | ||
860 | /* Adjust the increment according to three constraints: NITEMS_INCR_MIN, | |
861 | NITEMS_MAX, and what the C language can represent safely. */ | |
862 | ptrdiff_t C_language_max = min (PTRDIFF_MAX, SIZE_MAX) / item_size; | |
863 | ptrdiff_t n_max = (0 <= nitems_max && nitems_max < C_language_max | |
864 | ? nitems_max : C_language_max); | |
865 | ptrdiff_t nitems_incr_max = n_max - n; | |
866 | ptrdiff_t incr = max (nitems_incr_min, min (incr_estimate, nitems_incr_max)); | |
867 | ||
7216e43b | 868 | eassert (0 < item_size && 0 < nitems_incr_min && 0 <= n && -1 <= nitems_max); |
0065d054 PE |
869 | if (! pa) |
870 | *nitems = 0; | |
871 | if (nitems_incr_max < incr) | |
872 | memory_full (SIZE_MAX); | |
873 | n += incr; | |
874 | pa = xrealloc (pa, n * item_size); | |
875 | *nitems = n; | |
876 | return pa; | |
877 | } | |
878 | ||
879 | ||
dca7c6a8 GM |
880 | /* Like strdup, but uses xmalloc. */ |
881 | ||
882 | char * | |
971de7fb | 883 | xstrdup (const char *s) |
dca7c6a8 | 884 | { |
9acc1074 | 885 | ptrdiff_t size; |
309f24d1 | 886 | eassert (s); |
9acc1074 PE |
887 | size = strlen (s) + 1; |
888 | return memcpy (xmalloc (size), s, size); | |
dca7c6a8 GM |
889 | } |
890 | ||
5b71542d DA |
891 | /* Like above, but duplicates Lisp string to C string. */ |
892 | ||
893 | char * | |
894 | xlispstrdup (Lisp_Object string) | |
895 | { | |
896 | ptrdiff_t size = SBYTES (string) + 1; | |
897 | return memcpy (xmalloc (size), SSDATA (string), size); | |
898 | } | |
899 | ||
8268febf PE |
900 | /* Assign to *PTR a copy of STRING, freeing any storage *PTR formerly |
901 | pointed to. If STRING is null, assign it without copying anything. | |
902 | Allocate before freeing, to avoid a dangling pointer if allocation | |
903 | fails. */ | |
904 | ||
905 | void | |
906 | dupstring (char **ptr, char const *string) | |
907 | { | |
908 | char *old = *ptr; | |
909 | *ptr = string ? xstrdup (string) : 0; | |
910 | xfree (old); | |
911 | } | |
912 | ||
913 | ||
5745a7df PE |
914 | /* Like putenv, but (1) use the equivalent of xmalloc and (2) the |
915 | argument is a const pointer. */ | |
916 | ||
917 | void | |
918 | xputenv (char const *string) | |
919 | { | |
920 | if (putenv ((char *) string) != 0) | |
921 | memory_full (0); | |
922 | } | |
dca7c6a8 | 923 | |
98c6f1e3 PE |
924 | /* Return a newly allocated memory block of SIZE bytes, remembering |
925 | to free it when unwinding. */ | |
926 | void * | |
927 | record_xmalloc (size_t size) | |
928 | { | |
929 | void *p = xmalloc (size); | |
27e498e6 | 930 | record_unwind_protect_ptr (xfree, p); |
98c6f1e3 PE |
931 | return p; |
932 | } | |
933 | ||
f61bef8b | 934 | |
34400008 GM |
935 | /* Like malloc but used for allocating Lisp data. NBYTES is the |
936 | number of bytes to allocate, TYPE describes the intended use of the | |
91af3942 | 937 | allocated memory block (for strings, for conses, ...). */ |
34400008 | 938 | |
bfe3e0a2 PE |
939 | #if ! USE_LSB_TAG |
940 | void *lisp_malloc_loser EXTERNALLY_VISIBLE; | |
212f33f1 | 941 | #endif |
918a23a7 | 942 | |
261cb4bb | 943 | static void * |
971de7fb | 944 | lisp_malloc (size_t nbytes, enum mem_type type) |
c8099634 | 945 | { |
34400008 | 946 | register void *val; |
c8099634 | 947 | |
dafc79fa | 948 | MALLOC_BLOCK_INPUT; |
877935b1 GM |
949 | |
950 | #ifdef GC_MALLOC_CHECK | |
951 | allocated_mem_type = type; | |
952 | #endif | |
177c0ea7 | 953 | |
38182d90 | 954 | val = malloc (nbytes); |
c8099634 | 955 | |
bfe3e0a2 | 956 | #if ! USE_LSB_TAG |
918a23a7 RS |
957 | /* If the memory just allocated cannot be addressed thru a Lisp |
958 | object's pointer, and it needs to be, | |
959 | that's equivalent to running out of memory. */ | |
960 | if (val && type != MEM_TYPE_NON_LISP) | |
961 | { | |
962 | Lisp_Object tem; | |
963 | XSETCONS (tem, (char *) val + nbytes - 1); | |
964 | if ((char *) XCONS (tem) != (char *) val + nbytes - 1) | |
965 | { | |
966 | lisp_malloc_loser = val; | |
967 | free (val); | |
968 | val = 0; | |
969 | } | |
970 | } | |
6b61353c | 971 | #endif |
918a23a7 | 972 | |
877935b1 | 973 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
dca7c6a8 | 974 | if (val && type != MEM_TYPE_NON_LISP) |
34400008 GM |
975 | mem_insert (val, (char *) val + nbytes, type); |
976 | #endif | |
177c0ea7 | 977 | |
dafc79fa | 978 | MALLOC_UNBLOCK_INPUT; |
dca7c6a8 | 979 | if (!val && nbytes) |
531b0165 | 980 | memory_full (nbytes); |
c2d7786e | 981 | MALLOC_PROBE (nbytes); |
c8099634 RS |
982 | return val; |
983 | } | |
984 | ||
34400008 GM |
985 | /* Free BLOCK. This must be called to free memory allocated with a |
986 | call to lisp_malloc. */ | |
987 | ||
bf952fb6 | 988 | static void |
261cb4bb | 989 | lisp_free (void *block) |
c8099634 | 990 | { |
dafc79fa | 991 | MALLOC_BLOCK_INPUT; |
c8099634 | 992 | free (block); |
877935b1 | 993 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
34400008 GM |
994 | mem_delete (mem_find (block)); |
995 | #endif | |
dafc79fa | 996 | MALLOC_UNBLOCK_INPUT; |
c8099634 | 997 | } |
34400008 | 998 | |
453b951e SM |
999 | /***** Allocation of aligned blocks of memory to store Lisp data. *****/ |
1000 | ||
1001 | /* The entry point is lisp_align_malloc which returns blocks of at most | |
1002 | BLOCK_BYTES and guarantees they are aligned on a BLOCK_ALIGN boundary. */ | |
ab6780cd | 1003 | |
e76119d7 PE |
1004 | /* Use aligned_alloc if it or a simple substitute is available. |
1005 | Address sanitization breaks aligned allocation, as of gcc 4.8.2 and | |
1006 | clang 3.3 anyway. */ | |
1007 | ||
1008 | #if ! ADDRESS_SANITIZER | |
1009 | # if !defined SYSTEM_MALLOC && !defined DOUG_LEA_MALLOC | |
1010 | # define USE_ALIGNED_ALLOC 1 | |
aea07e2c PE |
1011 | /* Defined in gmalloc.c. */ |
1012 | void *aligned_alloc (size_t, size_t); | |
e76119d7 PE |
1013 | # elif defined HAVE_ALIGNED_ALLOC |
1014 | # define USE_ALIGNED_ALLOC 1 | |
1015 | # elif defined HAVE_POSIX_MEMALIGN | |
1016 | # define USE_ALIGNED_ALLOC 1 | |
aea07e2c PE |
1017 | static void * |
1018 | aligned_alloc (size_t alignment, size_t size) | |
1019 | { | |
1020 | void *p; | |
1021 | return posix_memalign (&p, alignment, size) == 0 ? p : 0; | |
1022 | } | |
e76119d7 | 1023 | # endif |
b4181b01 | 1024 | #endif |
ab6780cd SM |
1025 | |
1026 | /* BLOCK_ALIGN has to be a power of 2. */ | |
1027 | #define BLOCK_ALIGN (1 << 10) | |
ab6780cd SM |
1028 | |
1029 | /* Padding to leave at the end of a malloc'd block. This is to give | |
1030 | malloc a chance to minimize the amount of memory wasted to alignment. | |
1031 | It should be tuned to the particular malloc library used. | |
19bcad1f | 1032 | On glibc-2.3.2, malloc never tries to align, so a padding of 0 is best. |
aea07e2c | 1033 | aligned_alloc on the other hand would ideally prefer a value of 4 |
19bcad1f | 1034 | because otherwise, there's 1020 bytes wasted between each ablocks. |
f501ccb4 SM |
1035 | In Emacs, testing shows that those 1020 can most of the time be |
1036 | efficiently used by malloc to place other objects, so a value of 0 can | |
1037 | still preferable unless you have a lot of aligned blocks and virtually | |
1038 | nothing else. */ | |
19bcad1f SM |
1039 | #define BLOCK_PADDING 0 |
1040 | #define BLOCK_BYTES \ | |
0b432f21 | 1041 | (BLOCK_ALIGN - sizeof (struct ablocks *) - BLOCK_PADDING) |
19bcad1f SM |
1042 | |
1043 | /* Internal data structures and constants. */ | |
1044 | ||
ab6780cd SM |
1045 | #define ABLOCKS_SIZE 16 |
1046 | ||
1047 | /* An aligned block of memory. */ | |
1048 | struct ablock | |
1049 | { | |
1050 | union | |
1051 | { | |
1052 | char payload[BLOCK_BYTES]; | |
1053 | struct ablock *next_free; | |
1054 | } x; | |
1055 | /* `abase' is the aligned base of the ablocks. */ | |
1056 | /* It is overloaded to hold the virtual `busy' field that counts | |
1057 | the number of used ablock in the parent ablocks. | |
1058 | The first ablock has the `busy' field, the others have the `abase' | |
1059 | field. To tell the difference, we assume that pointers will have | |
1060 | integer values larger than 2 * ABLOCKS_SIZE. The lowest bit of `busy' | |
1061 | is used to tell whether the real base of the parent ablocks is `abase' | |
1062 | (if not, the word before the first ablock holds a pointer to the | |
1063 | real base). */ | |
1064 | struct ablocks *abase; | |
1065 | /* The padding of all but the last ablock is unused. The padding of | |
1066 | the last ablock in an ablocks is not allocated. */ | |
19bcad1f SM |
1067 | #if BLOCK_PADDING |
1068 | char padding[BLOCK_PADDING]; | |
ebb8d410 | 1069 | #endif |
ab6780cd SM |
1070 | }; |
1071 | ||
1072 | /* A bunch of consecutive aligned blocks. */ | |
1073 | struct ablocks | |
1074 | { | |
1075 | struct ablock blocks[ABLOCKS_SIZE]; | |
1076 | }; | |
1077 | ||
aea07e2c | 1078 | /* Size of the block requested from malloc or aligned_alloc. */ |
19bcad1f | 1079 | #define ABLOCKS_BYTES (sizeof (struct ablocks) - BLOCK_PADDING) |
ab6780cd SM |
1080 | |
1081 | #define ABLOCK_ABASE(block) \ | |
d01a7826 | 1082 | (((uintptr_t) (block)->abase) <= (1 + 2 * ABLOCKS_SIZE) \ |
ab6780cd SM |
1083 | ? (struct ablocks *)(block) \ |
1084 | : (block)->abase) | |
1085 | ||
1086 | /* Virtual `busy' field. */ | |
1087 | #define ABLOCKS_BUSY(abase) ((abase)->blocks[0].abase) | |
1088 | ||
1089 | /* Pointer to the (not necessarily aligned) malloc block. */ | |
aea07e2c | 1090 | #ifdef USE_ALIGNED_ALLOC |
19bcad1f SM |
1091 | #define ABLOCKS_BASE(abase) (abase) |
1092 | #else | |
ab6780cd | 1093 | #define ABLOCKS_BASE(abase) \ |
7be68de5 | 1094 | (1 & (intptr_t) ABLOCKS_BUSY (abase) ? abase : ((void **)abase)[-1]) |
19bcad1f | 1095 | #endif |
ab6780cd SM |
1096 | |
1097 | /* The list of free ablock. */ | |
1098 | static struct ablock *free_ablock; | |
1099 | ||
1100 | /* Allocate an aligned block of nbytes. | |
1101 | Alignment is on a multiple of BLOCK_ALIGN and `nbytes' has to be | |
1102 | smaller or equal to BLOCK_BYTES. */ | |
261cb4bb | 1103 | static void * |
971de7fb | 1104 | lisp_align_malloc (size_t nbytes, enum mem_type type) |
ab6780cd SM |
1105 | { |
1106 | void *base, *val; | |
1107 | struct ablocks *abase; | |
1108 | ||
1109 | eassert (nbytes <= BLOCK_BYTES); | |
1110 | ||
dafc79fa | 1111 | MALLOC_BLOCK_INPUT; |
ab6780cd SM |
1112 | |
1113 | #ifdef GC_MALLOC_CHECK | |
1114 | allocated_mem_type = type; | |
1115 | #endif | |
1116 | ||
1117 | if (!free_ablock) | |
1118 | { | |
005ca5c7 | 1119 | int i; |
d01a7826 | 1120 | intptr_t aligned; /* int gets warning casting to 64-bit pointer. */ |
ab6780cd SM |
1121 | |
1122 | #ifdef DOUG_LEA_MALLOC | |
f20b8315 DC |
1123 | if (!mmap_lisp_allowed_p ()) |
1124 | mallopt (M_MMAP_MAX, 0); | |
ab6780cd SM |
1125 | #endif |
1126 | ||
aea07e2c PE |
1127 | #ifdef USE_ALIGNED_ALLOC |
1128 | abase = base = aligned_alloc (BLOCK_ALIGN, ABLOCKS_BYTES); | |
19bcad1f | 1129 | #else |
ab6780cd SM |
1130 | base = malloc (ABLOCKS_BYTES); |
1131 | abase = ALIGN (base, BLOCK_ALIGN); | |
ab349c19 RS |
1132 | #endif |
1133 | ||
6b61353c KH |
1134 | if (base == 0) |
1135 | { | |
dafc79fa | 1136 | MALLOC_UNBLOCK_INPUT; |
531b0165 | 1137 | memory_full (ABLOCKS_BYTES); |
6b61353c | 1138 | } |
ab6780cd SM |
1139 | |
1140 | aligned = (base == abase); | |
1141 | if (!aligned) | |
7be68de5 | 1142 | ((void **) abase)[-1] = base; |
ab6780cd SM |
1143 | |
1144 | #ifdef DOUG_LEA_MALLOC | |
f20b8315 DC |
1145 | if (!mmap_lisp_allowed_p ()) |
1146 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
ab6780cd SM |
1147 | #endif |
1148 | ||
bfe3e0a2 | 1149 | #if ! USE_LSB_TAG |
8f924df7 KH |
1150 | /* If the memory just allocated cannot be addressed thru a Lisp |
1151 | object's pointer, and it needs to be, that's equivalent to | |
1152 | running out of memory. */ | |
1153 | if (type != MEM_TYPE_NON_LISP) | |
1154 | { | |
1155 | Lisp_Object tem; | |
1156 | char *end = (char *) base + ABLOCKS_BYTES - 1; | |
1157 | XSETCONS (tem, end); | |
1158 | if ((char *) XCONS (tem) != end) | |
1159 | { | |
1160 | lisp_malloc_loser = base; | |
1161 | free (base); | |
dafc79fa | 1162 | MALLOC_UNBLOCK_INPUT; |
531b0165 | 1163 | memory_full (SIZE_MAX); |
8f924df7 KH |
1164 | } |
1165 | } | |
6b61353c | 1166 | #endif |
8f924df7 | 1167 | |
ab6780cd | 1168 | /* Initialize the blocks and put them on the free list. |
453b951e | 1169 | If `base' was not properly aligned, we can't use the last block. */ |
ab6780cd SM |
1170 | for (i = 0; i < (aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1); i++) |
1171 | { | |
1172 | abase->blocks[i].abase = abase; | |
1173 | abase->blocks[i].x.next_free = free_ablock; | |
1174 | free_ablock = &abase->blocks[i]; | |
1175 | } | |
8ac068ac | 1176 | ABLOCKS_BUSY (abase) = (struct ablocks *) aligned; |
ab6780cd | 1177 | |
d01a7826 | 1178 | eassert (0 == ((uintptr_t) abase) % BLOCK_ALIGN); |
ab6780cd SM |
1179 | eassert (ABLOCK_ABASE (&abase->blocks[3]) == abase); /* 3 is arbitrary */ |
1180 | eassert (ABLOCK_ABASE (&abase->blocks[0]) == abase); | |
1181 | eassert (ABLOCKS_BASE (abase) == base); | |
d01a7826 | 1182 | eassert (aligned == (intptr_t) ABLOCKS_BUSY (abase)); |
ab6780cd SM |
1183 | } |
1184 | ||
1185 | abase = ABLOCK_ABASE (free_ablock); | |
caecb91c SM |
1186 | ABLOCKS_BUSY (abase) |
1187 | = (struct ablocks *) (2 + (intptr_t) ABLOCKS_BUSY (abase)); | |
ab6780cd SM |
1188 | val = free_ablock; |
1189 | free_ablock = free_ablock->x.next_free; | |
1190 | ||
ab6780cd | 1191 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
3687c2ef | 1192 | if (type != MEM_TYPE_NON_LISP) |
ab6780cd SM |
1193 | mem_insert (val, (char *) val + nbytes, type); |
1194 | #endif | |
1195 | ||
dafc79fa | 1196 | MALLOC_UNBLOCK_INPUT; |
ab6780cd | 1197 | |
c2d7786e TM |
1198 | MALLOC_PROBE (nbytes); |
1199 | ||
d01a7826 | 1200 | eassert (0 == ((uintptr_t) val) % BLOCK_ALIGN); |
ab6780cd SM |
1201 | return val; |
1202 | } | |
1203 | ||
1204 | static void | |
261cb4bb | 1205 | lisp_align_free (void *block) |
ab6780cd SM |
1206 | { |
1207 | struct ablock *ablock = block; | |
1208 | struct ablocks *abase = ABLOCK_ABASE (ablock); | |
1209 | ||
dafc79fa | 1210 | MALLOC_BLOCK_INPUT; |
ab6780cd SM |
1211 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK |
1212 | mem_delete (mem_find (block)); | |
1213 | #endif | |
1214 | /* Put on free list. */ | |
1215 | ablock->x.next_free = free_ablock; | |
1216 | free_ablock = ablock; | |
1217 | /* Update busy count. */ | |
453b951e SM |
1218 | ABLOCKS_BUSY (abase) |
1219 | = (struct ablocks *) (-2 + (intptr_t) ABLOCKS_BUSY (abase)); | |
d2db1c32 | 1220 | |
d01a7826 | 1221 | if (2 > (intptr_t) ABLOCKS_BUSY (abase)) |
ab6780cd | 1222 | { /* All the blocks are free. */ |
d01a7826 | 1223 | int i = 0, aligned = (intptr_t) ABLOCKS_BUSY (abase); |
ab6780cd SM |
1224 | struct ablock **tem = &free_ablock; |
1225 | struct ablock *atop = &abase->blocks[aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1]; | |
1226 | ||
1227 | while (*tem) | |
1228 | { | |
1229 | if (*tem >= (struct ablock *) abase && *tem < atop) | |
1230 | { | |
1231 | i++; | |
1232 | *tem = (*tem)->x.next_free; | |
1233 | } | |
1234 | else | |
1235 | tem = &(*tem)->x.next_free; | |
1236 | } | |
1237 | eassert ((aligned & 1) == aligned); | |
1238 | eassert (i == (aligned ? ABLOCKS_SIZE : ABLOCKS_SIZE - 1)); | |
349a4500 | 1239 | #ifdef USE_POSIX_MEMALIGN |
d01a7826 | 1240 | eassert ((uintptr_t) ABLOCKS_BASE (abase) % BLOCK_ALIGN == 0); |
cfb2f32e | 1241 | #endif |
ab6780cd SM |
1242 | free (ABLOCKS_BASE (abase)); |
1243 | } | |
dafc79fa | 1244 | MALLOC_UNBLOCK_INPUT; |
ab6780cd | 1245 | } |
3ef06d12 | 1246 | |
9ac0d9e0 | 1247 | \f |
2e471eb5 GM |
1248 | /*********************************************************************** |
1249 | Interval Allocation | |
1250 | ***********************************************************************/ | |
1a4f1e2c | 1251 | |
34400008 GM |
1252 | /* Number of intervals allocated in an interval_block structure. |
1253 | The 1020 is 1024 minus malloc overhead. */ | |
1254 | ||
d5e35230 JA |
1255 | #define INTERVAL_BLOCK_SIZE \ |
1256 | ((1020 - sizeof (struct interval_block *)) / sizeof (struct interval)) | |
1257 | ||
bad98418 | 1258 | /* Intervals are allocated in chunks in the form of an interval_block |
34400008 GM |
1259 | structure. */ |
1260 | ||
d5e35230 | 1261 | struct interval_block |
2e471eb5 | 1262 | { |
6b61353c | 1263 | /* Place `intervals' first, to preserve alignment. */ |
2e471eb5 | 1264 | struct interval intervals[INTERVAL_BLOCK_SIZE]; |
6b61353c | 1265 | struct interval_block *next; |
2e471eb5 | 1266 | }; |
d5e35230 | 1267 | |
34400008 GM |
1268 | /* Current interval block. Its `next' pointer points to older |
1269 | blocks. */ | |
1270 | ||
d3d47262 | 1271 | static struct interval_block *interval_block; |
34400008 GM |
1272 | |
1273 | /* Index in interval_block above of the next unused interval | |
1274 | structure. */ | |
1275 | ||
fff62aa9 | 1276 | static int interval_block_index = INTERVAL_BLOCK_SIZE; |
34400008 GM |
1277 | |
1278 | /* Number of free and live intervals. */ | |
1279 | ||
c0c5c8ae | 1280 | static EMACS_INT total_free_intervals, total_intervals; |
d5e35230 | 1281 | |
34400008 GM |
1282 | /* List of free intervals. */ |
1283 | ||
244ed907 | 1284 | static INTERVAL interval_free_list; |
d5e35230 | 1285 | |
34400008 | 1286 | /* Return a new interval. */ |
d5e35230 JA |
1287 | |
1288 | INTERVAL | |
971de7fb | 1289 | make_interval (void) |
d5e35230 JA |
1290 | { |
1291 | INTERVAL val; | |
1292 | ||
dafc79fa | 1293 | MALLOC_BLOCK_INPUT; |
cfb2f32e | 1294 | |
d5e35230 JA |
1295 | if (interval_free_list) |
1296 | { | |
1297 | val = interval_free_list; | |
439d5cb4 | 1298 | interval_free_list = INTERVAL_PARENT (interval_free_list); |
d5e35230 JA |
1299 | } |
1300 | else | |
1301 | { | |
1302 | if (interval_block_index == INTERVAL_BLOCK_SIZE) | |
1303 | { | |
38182d90 PE |
1304 | struct interval_block *newi |
1305 | = lisp_malloc (sizeof *newi, MEM_TYPE_NON_LISP); | |
d5e35230 | 1306 | |
d5e35230 JA |
1307 | newi->next = interval_block; |
1308 | interval_block = newi; | |
1309 | interval_block_index = 0; | |
3900d5de | 1310 | total_free_intervals += INTERVAL_BLOCK_SIZE; |
d5e35230 JA |
1311 | } |
1312 | val = &interval_block->intervals[interval_block_index++]; | |
1313 | } | |
e2984df0 | 1314 | |
dafc79fa | 1315 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 1316 | |
d5e35230 | 1317 | consing_since_gc += sizeof (struct interval); |
310ea200 | 1318 | intervals_consed++; |
3900d5de | 1319 | total_free_intervals--; |
d5e35230 | 1320 | RESET_INTERVAL (val); |
2336fe58 | 1321 | val->gcmarkbit = 0; |
d5e35230 JA |
1322 | return val; |
1323 | } | |
1324 | ||
34400008 | 1325 | |
ee28be33 | 1326 | /* Mark Lisp objects in interval I. */ |
d5e35230 JA |
1327 | |
1328 | static void | |
971de7fb | 1329 | mark_interval (register INTERVAL i, Lisp_Object dummy) |
d5e35230 | 1330 | { |
cce7fefc DA |
1331 | /* Intervals should never be shared. So, if extra internal checking is |
1332 | enabled, GC aborts if it seems to have visited an interval twice. */ | |
1333 | eassert (!i->gcmarkbit); | |
2336fe58 | 1334 | i->gcmarkbit = 1; |
49723c04 | 1335 | mark_object (i->plist); |
d5e35230 JA |
1336 | } |
1337 | ||
34400008 GM |
1338 | /* Mark the interval tree rooted in I. */ |
1339 | ||
8707c1e5 DA |
1340 | #define MARK_INTERVAL_TREE(i) \ |
1341 | do { \ | |
1342 | if (i && !i->gcmarkbit) \ | |
1343 | traverse_intervals_noorder (i, mark_interval, Qnil); \ | |
2e471eb5 | 1344 | } while (0) |
77c7bcb1 | 1345 | |
2e471eb5 GM |
1346 | /*********************************************************************** |
1347 | String Allocation | |
1348 | ***********************************************************************/ | |
1a4f1e2c | 1349 | |
2e471eb5 GM |
1350 | /* Lisp_Strings are allocated in string_block structures. When a new |
1351 | string_block is allocated, all the Lisp_Strings it contains are | |
e0fead5d | 1352 | added to a free-list string_free_list. When a new Lisp_String is |
2e471eb5 GM |
1353 | needed, it is taken from that list. During the sweep phase of GC, |
1354 | string_blocks that are entirely free are freed, except two which | |
1355 | we keep. | |
7146af97 | 1356 | |
2e471eb5 GM |
1357 | String data is allocated from sblock structures. Strings larger |
1358 | than LARGE_STRING_BYTES, get their own sblock, data for smaller | |
1359 | strings is sub-allocated out of sblocks of size SBLOCK_SIZE. | |
7146af97 | 1360 | |
2e471eb5 GM |
1361 | Sblocks consist internally of sdata structures, one for each |
1362 | Lisp_String. The sdata structure points to the Lisp_String it | |
1363 | belongs to. The Lisp_String points back to the `u.data' member of | |
1364 | its sdata structure. | |
7146af97 | 1365 | |
2e471eb5 GM |
1366 | When a Lisp_String is freed during GC, it is put back on |
1367 | string_free_list, and its `data' member and its sdata's `string' | |
1368 | pointer is set to null. The size of the string is recorded in the | |
fbe9e0b9 | 1369 | `n.nbytes' member of the sdata. So, sdata structures that are no |
2e471eb5 GM |
1370 | longer used, can be easily recognized, and it's easy to compact the |
1371 | sblocks of small strings which we do in compact_small_strings. */ | |
7146af97 | 1372 | |
2e471eb5 GM |
1373 | /* Size in bytes of an sblock structure used for small strings. This |
1374 | is 8192 minus malloc overhead. */ | |
7146af97 | 1375 | |
2e471eb5 | 1376 | #define SBLOCK_SIZE 8188 |
c8099634 | 1377 | |
2e471eb5 GM |
1378 | /* Strings larger than this are considered large strings. String data |
1379 | for large strings is allocated from individual sblocks. */ | |
7146af97 | 1380 | |
2e471eb5 GM |
1381 | #define LARGE_STRING_BYTES 1024 |
1382 | ||
91f2d272 PE |
1383 | /* The SDATA typedef is a struct or union describing string memory |
1384 | sub-allocated from an sblock. This is where the contents of Lisp | |
1385 | strings are stored. */ | |
2e471eb5 | 1386 | |
91f2d272 | 1387 | struct sdata |
7146af97 | 1388 | { |
2e471eb5 | 1389 | /* Back-pointer to the string this sdata belongs to. If null, this |
91f2d272 | 1390 | structure is free, and NBYTES (in this structure or in the union below) |
34400008 | 1391 | contains the string's byte size (the same value that STRING_BYTES |
2e471eb5 GM |
1392 | would return if STRING were non-null). If non-null, STRING_BYTES |
1393 | (STRING) is the size of the data, and DATA contains the string's | |
1394 | contents. */ | |
1395 | struct Lisp_String *string; | |
7146af97 | 1396 | |
91f2d272 | 1397 | #ifdef GC_CHECK_STRING_BYTES |
d311d28c | 1398 | ptrdiff_t nbytes; |
91f2d272 PE |
1399 | #endif |
1400 | ||
fbe9e0b9 | 1401 | unsigned char data[FLEXIBLE_ARRAY_MEMBER]; |
91f2d272 PE |
1402 | }; |
1403 | ||
1404 | #ifdef GC_CHECK_STRING_BYTES | |
177c0ea7 | 1405 | |
91f2d272 | 1406 | typedef struct sdata sdata; |
31d929e5 GM |
1407 | #define SDATA_NBYTES(S) (S)->nbytes |
1408 | #define SDATA_DATA(S) (S)->data | |
177c0ea7 | 1409 | |
fbe9e0b9 | 1410 | #else |
31d929e5 | 1411 | |
fbe9e0b9 PE |
1412 | typedef union |
1413 | { | |
1414 | struct Lisp_String *string; | |
1415 | ||
91f2d272 PE |
1416 | /* When STRING is nonnull, this union is actually of type 'struct sdata', |
1417 | which has a flexible array member. However, if implemented by | |
1418 | giving this union a member of type 'struct sdata', the union | |
1419 | could not be the last (flexible) member of 'struct sblock', | |
1420 | because C99 prohibits a flexible array member from having a type | |
1421 | that is itself a flexible array. So, comment this member out here, | |
1422 | but remember that the option's there when using this union. */ | |
1423 | #if 0 | |
1424 | struct sdata u; | |
1425 | #endif | |
2e471eb5 | 1426 | |
fbe9e0b9 PE |
1427 | /* When STRING is null. */ |
1428 | struct | |
1429 | { | |
1430 | struct Lisp_String *string; | |
d311d28c | 1431 | ptrdiff_t nbytes; |
fbe9e0b9 PE |
1432 | } n; |
1433 | } sdata; | |
177c0ea7 | 1434 | |
fbe9e0b9 | 1435 | #define SDATA_NBYTES(S) (S)->n.nbytes |
91f2d272 | 1436 | #define SDATA_DATA(S) ((struct sdata *) (S))->data |
31d929e5 GM |
1437 | |
1438 | #endif /* not GC_CHECK_STRING_BYTES */ | |
36372bf9 | 1439 | |
91f2d272 | 1440 | enum { SDATA_DATA_OFFSET = offsetof (struct sdata, data) }; |
31d929e5 | 1441 | |
2e471eb5 GM |
1442 | /* Structure describing a block of memory which is sub-allocated to |
1443 | obtain string data memory for strings. Blocks for small strings | |
1444 | are of fixed size SBLOCK_SIZE. Blocks for large strings are made | |
1445 | as large as needed. */ | |
1446 | ||
1447 | struct sblock | |
7146af97 | 1448 | { |
2e471eb5 GM |
1449 | /* Next in list. */ |
1450 | struct sblock *next; | |
7146af97 | 1451 | |
2e471eb5 GM |
1452 | /* Pointer to the next free sdata block. This points past the end |
1453 | of the sblock if there isn't any space left in this block. */ | |
fbe9e0b9 | 1454 | sdata *next_free; |
2e471eb5 | 1455 | |
91f2d272 PE |
1456 | /* String data. */ |
1457 | sdata data[FLEXIBLE_ARRAY_MEMBER]; | |
2e471eb5 GM |
1458 | }; |
1459 | ||
1460 | /* Number of Lisp strings in a string_block structure. The 1020 is | |
1461 | 1024 minus malloc overhead. */ | |
1462 | ||
19bcad1f | 1463 | #define STRING_BLOCK_SIZE \ |
2e471eb5 GM |
1464 | ((1020 - sizeof (struct string_block *)) / sizeof (struct Lisp_String)) |
1465 | ||
1466 | /* Structure describing a block from which Lisp_String structures | |
1467 | are allocated. */ | |
1468 | ||
1469 | struct string_block | |
7146af97 | 1470 | { |
6b61353c | 1471 | /* Place `strings' first, to preserve alignment. */ |
19bcad1f | 1472 | struct Lisp_String strings[STRING_BLOCK_SIZE]; |
6b61353c | 1473 | struct string_block *next; |
2e471eb5 | 1474 | }; |
7146af97 | 1475 | |
2e471eb5 GM |
1476 | /* Head and tail of the list of sblock structures holding Lisp string |
1477 | data. We always allocate from current_sblock. The NEXT pointers | |
1478 | in the sblock structures go from oldest_sblock to current_sblock. */ | |
3c06d205 | 1479 | |
2e471eb5 | 1480 | static struct sblock *oldest_sblock, *current_sblock; |
7146af97 | 1481 | |
2e471eb5 | 1482 | /* List of sblocks for large strings. */ |
7146af97 | 1483 | |
2e471eb5 | 1484 | static struct sblock *large_sblocks; |
7146af97 | 1485 | |
5a25e253 | 1486 | /* List of string_block structures. */ |
7146af97 | 1487 | |
2e471eb5 | 1488 | static struct string_block *string_blocks; |
7146af97 | 1489 | |
2e471eb5 | 1490 | /* Free-list of Lisp_Strings. */ |
7146af97 | 1491 | |
2e471eb5 | 1492 | static struct Lisp_String *string_free_list; |
7146af97 | 1493 | |
2e471eb5 | 1494 | /* Number of live and free Lisp_Strings. */ |
c8099634 | 1495 | |
c0c5c8ae | 1496 | static EMACS_INT total_strings, total_free_strings; |
7146af97 | 1497 | |
2e471eb5 GM |
1498 | /* Number of bytes used by live strings. */ |
1499 | ||
3ab6e069 | 1500 | static EMACS_INT total_string_bytes; |
2e471eb5 GM |
1501 | |
1502 | /* Given a pointer to a Lisp_String S which is on the free-list | |
1503 | string_free_list, return a pointer to its successor in the | |
1504 | free-list. */ | |
1505 | ||
1506 | #define NEXT_FREE_LISP_STRING(S) (*(struct Lisp_String **) (S)) | |
1507 | ||
1508 | /* Return a pointer to the sdata structure belonging to Lisp string S. | |
1509 | S must be live, i.e. S->data must not be null. S->data is actually | |
1510 | a pointer to the `u.data' member of its sdata structure; the | |
1511 | structure starts at a constant offset in front of that. */ | |
177c0ea7 | 1512 | |
fbe9e0b9 | 1513 | #define SDATA_OF_STRING(S) ((sdata *) ((S)->data - SDATA_DATA_OFFSET)) |
31d929e5 | 1514 | |
212f33f1 KS |
1515 | |
1516 | #ifdef GC_CHECK_STRING_OVERRUN | |
bdbed949 KS |
1517 | |
1518 | /* We check for overrun in string data blocks by appending a small | |
1519 | "cookie" after each allocated string data block, and check for the | |
8349069c | 1520 | presence of this cookie during GC. */ |
bdbed949 KS |
1521 | |
1522 | #define GC_STRING_OVERRUN_COOKIE_SIZE 4 | |
bfd1c781 PE |
1523 | static char const string_overrun_cookie[GC_STRING_OVERRUN_COOKIE_SIZE] = |
1524 | { '\xde', '\xad', '\xbe', '\xef' }; | |
bdbed949 | 1525 | |
212f33f1 | 1526 | #else |
bdbed949 | 1527 | #define GC_STRING_OVERRUN_COOKIE_SIZE 0 |
212f33f1 KS |
1528 | #endif |
1529 | ||
2e471eb5 GM |
1530 | /* Value is the size of an sdata structure large enough to hold NBYTES |
1531 | bytes of string data. The value returned includes a terminating | |
1532 | NUL byte, the size of the sdata structure, and padding. */ | |
1533 | ||
31d929e5 GM |
1534 | #ifdef GC_CHECK_STRING_BYTES |
1535 | ||
2e471eb5 | 1536 | #define SDATA_SIZE(NBYTES) \ |
36372bf9 | 1537 | ((SDATA_DATA_OFFSET \ |
2e471eb5 | 1538 | + (NBYTES) + 1 \ |
d311d28c PE |
1539 | + sizeof (ptrdiff_t) - 1) \ |
1540 | & ~(sizeof (ptrdiff_t) - 1)) | |
2e471eb5 | 1541 | |
31d929e5 GM |
1542 | #else /* not GC_CHECK_STRING_BYTES */ |
1543 | ||
f2d3008d PE |
1544 | /* The 'max' reserves space for the nbytes union member even when NBYTES + 1 is |
1545 | less than the size of that member. The 'max' is not needed when | |
d311d28c | 1546 | SDATA_DATA_OFFSET is a multiple of sizeof (ptrdiff_t), because then the |
f2d3008d PE |
1547 | alignment code reserves enough space. */ |
1548 | ||
1549 | #define SDATA_SIZE(NBYTES) \ | |
1550 | ((SDATA_DATA_OFFSET \ | |
d311d28c | 1551 | + (SDATA_DATA_OFFSET % sizeof (ptrdiff_t) == 0 \ |
f2d3008d | 1552 | ? NBYTES \ |
d311d28c | 1553 | : max (NBYTES, sizeof (ptrdiff_t) - 1)) \ |
f2d3008d | 1554 | + 1 \ |
d311d28c PE |
1555 | + sizeof (ptrdiff_t) - 1) \ |
1556 | & ~(sizeof (ptrdiff_t) - 1)) | |
31d929e5 GM |
1557 | |
1558 | #endif /* not GC_CHECK_STRING_BYTES */ | |
2e471eb5 | 1559 | |
bdbed949 KS |
1560 | /* Extra bytes to allocate for each string. */ |
1561 | ||
1562 | #define GC_STRING_EXTRA (GC_STRING_OVERRUN_COOKIE_SIZE) | |
1563 | ||
c9d624c6 PE |
1564 | /* Exact bound on the number of bytes in a string, not counting the |
1565 | terminating null. A string cannot contain more bytes than | |
1566 | STRING_BYTES_BOUND, nor can it be so long that the size_t | |
1567 | arithmetic in allocate_string_data would overflow while it is | |
1568 | calculating a value to be passed to malloc. */ | |
03a660a6 PE |
1569 | static ptrdiff_t const STRING_BYTES_MAX = |
1570 | min (STRING_BYTES_BOUND, | |
1571 | ((SIZE_MAX - XMALLOC_OVERRUN_CHECK_OVERHEAD | |
1572 | - GC_STRING_EXTRA | |
91f2d272 | 1573 | - offsetof (struct sblock, data) |
03a660a6 PE |
1574 | - SDATA_DATA_OFFSET) |
1575 | & ~(sizeof (EMACS_INT) - 1))); | |
c9d624c6 | 1576 | |
2e471eb5 | 1577 | /* Initialize string allocation. Called from init_alloc_once. */ |
d457598b | 1578 | |
d3d47262 | 1579 | static void |
971de7fb | 1580 | init_strings (void) |
7146af97 | 1581 | { |
4d774b0f JB |
1582 | empty_unibyte_string = make_pure_string ("", 0, 0, 0); |
1583 | empty_multibyte_string = make_pure_string ("", 0, 0, 1); | |
7146af97 JB |
1584 | } |
1585 | ||
2e471eb5 | 1586 | |
361b097f GM |
1587 | #ifdef GC_CHECK_STRING_BYTES |
1588 | ||
361b097f GM |
1589 | static int check_string_bytes_count; |
1590 | ||
e499d0ee DA |
1591 | /* Like STRING_BYTES, but with debugging check. Can be |
1592 | called during GC, so pay attention to the mark bit. */ | |
676a7251 | 1593 | |
d311d28c | 1594 | ptrdiff_t |
14162469 | 1595 | string_bytes (struct Lisp_String *s) |
676a7251 | 1596 | { |
d311d28c | 1597 | ptrdiff_t nbytes = |
14162469 EZ |
1598 | (s->size_byte < 0 ? s->size & ~ARRAY_MARK_FLAG : s->size_byte); |
1599 | ||
676a7251 GM |
1600 | if (!PURE_POINTER_P (s) |
1601 | && s->data | |
1602 | && nbytes != SDATA_NBYTES (SDATA_OF_STRING (s))) | |
1088b922 | 1603 | emacs_abort (); |
676a7251 GM |
1604 | return nbytes; |
1605 | } | |
177c0ea7 | 1606 | |
2c5bd608 | 1607 | /* Check validity of Lisp strings' string_bytes member in B. */ |
676a7251 | 1608 | |
d3d47262 | 1609 | static void |
d0f4e1f5 | 1610 | check_sblock (struct sblock *b) |
361b097f | 1611 | { |
fbe9e0b9 | 1612 | sdata *from, *end, *from_end; |
177c0ea7 | 1613 | |
676a7251 | 1614 | end = b->next_free; |
177c0ea7 | 1615 | |
91f2d272 | 1616 | for (from = b->data; from < end; from = from_end) |
361b097f | 1617 | { |
676a7251 GM |
1618 | /* Compute the next FROM here because copying below may |
1619 | overwrite data we need to compute it. */ | |
d311d28c | 1620 | ptrdiff_t nbytes; |
177c0ea7 | 1621 | |
676a7251 | 1622 | /* Check that the string size recorded in the string is the |
ee28be33 | 1623 | same as the one recorded in the sdata structure. */ |
e499d0ee DA |
1624 | nbytes = SDATA_SIZE (from->string ? string_bytes (from->string) |
1625 | : SDATA_NBYTES (from)); | |
fbe9e0b9 | 1626 | from_end = (sdata *) ((char *) from + nbytes + GC_STRING_EXTRA); |
676a7251 GM |
1627 | } |
1628 | } | |
361b097f | 1629 | |
676a7251 GM |
1630 | |
1631 | /* Check validity of Lisp strings' string_bytes member. ALL_P | |
fce31d69 | 1632 | means check all strings, otherwise check only most |
676a7251 GM |
1633 | recently allocated strings. Used for hunting a bug. */ |
1634 | ||
d3d47262 | 1635 | static void |
fce31d69 | 1636 | check_string_bytes (bool all_p) |
676a7251 GM |
1637 | { |
1638 | if (all_p) | |
1639 | { | |
1640 | struct sblock *b; | |
1641 | ||
1642 | for (b = large_sblocks; b; b = b->next) | |
1643 | { | |
91f2d272 | 1644 | struct Lisp_String *s = b->data[0].string; |
676a7251 | 1645 | if (s) |
e499d0ee | 1646 | string_bytes (s); |
361b097f | 1647 | } |
177c0ea7 | 1648 | |
676a7251 GM |
1649 | for (b = oldest_sblock; b; b = b->next) |
1650 | check_sblock (b); | |
361b097f | 1651 | } |
296094c3 | 1652 | else if (current_sblock) |
676a7251 | 1653 | check_sblock (current_sblock); |
361b097f GM |
1654 | } |
1655 | ||
e499d0ee DA |
1656 | #else /* not GC_CHECK_STRING_BYTES */ |
1657 | ||
1658 | #define check_string_bytes(all) ((void) 0) | |
1659 | ||
361b097f GM |
1660 | #endif /* GC_CHECK_STRING_BYTES */ |
1661 | ||
212f33f1 KS |
1662 | #ifdef GC_CHECK_STRING_FREE_LIST |
1663 | ||
bdbed949 KS |
1664 | /* Walk through the string free list looking for bogus next pointers. |
1665 | This may catch buffer overrun from a previous string. */ | |
1666 | ||
212f33f1 | 1667 | static void |
d0f4e1f5 | 1668 | check_string_free_list (void) |
212f33f1 KS |
1669 | { |
1670 | struct Lisp_String *s; | |
1671 | ||
1672 | /* Pop a Lisp_String off the free-list. */ | |
1673 | s = string_free_list; | |
1674 | while (s != NULL) | |
1675 | { | |
d01a7826 | 1676 | if ((uintptr_t) s < 1024) |
1088b922 | 1677 | emacs_abort (); |
212f33f1 KS |
1678 | s = NEXT_FREE_LISP_STRING (s); |
1679 | } | |
1680 | } | |
1681 | #else | |
1682 | #define check_string_free_list() | |
1683 | #endif | |
361b097f | 1684 | |
2e471eb5 GM |
1685 | /* Return a new Lisp_String. */ |
1686 | ||
1687 | static struct Lisp_String * | |
971de7fb | 1688 | allocate_string (void) |
7146af97 | 1689 | { |
2e471eb5 | 1690 | struct Lisp_String *s; |
7146af97 | 1691 | |
dafc79fa | 1692 | MALLOC_BLOCK_INPUT; |
cfb2f32e | 1693 | |
2e471eb5 GM |
1694 | /* If the free-list is empty, allocate a new string_block, and |
1695 | add all the Lisp_Strings in it to the free-list. */ | |
1696 | if (string_free_list == NULL) | |
7146af97 | 1697 | { |
38182d90 | 1698 | struct string_block *b = lisp_malloc (sizeof *b, MEM_TYPE_STRING); |
2e471eb5 GM |
1699 | int i; |
1700 | ||
2e471eb5 GM |
1701 | b->next = string_blocks; |
1702 | string_blocks = b; | |
2e471eb5 | 1703 | |
19bcad1f | 1704 | for (i = STRING_BLOCK_SIZE - 1; i >= 0; --i) |
7146af97 | 1705 | { |
2e471eb5 | 1706 | s = b->strings + i; |
3fe6dd74 DA |
1707 | /* Every string on a free list should have NULL data pointer. */ |
1708 | s->data = NULL; | |
2e471eb5 GM |
1709 | NEXT_FREE_LISP_STRING (s) = string_free_list; |
1710 | string_free_list = s; | |
7146af97 | 1711 | } |
2e471eb5 | 1712 | |
19bcad1f | 1713 | total_free_strings += STRING_BLOCK_SIZE; |
7146af97 | 1714 | } |
c0f51373 | 1715 | |
bdbed949 | 1716 | check_string_free_list (); |
212f33f1 | 1717 | |
2e471eb5 GM |
1718 | /* Pop a Lisp_String off the free-list. */ |
1719 | s = string_free_list; | |
1720 | string_free_list = NEXT_FREE_LISP_STRING (s); | |
c0f51373 | 1721 | |
dafc79fa | 1722 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 1723 | |
2e471eb5 GM |
1724 | --total_free_strings; |
1725 | ++total_strings; | |
1726 | ++strings_consed; | |
1727 | consing_since_gc += sizeof *s; | |
c0f51373 | 1728 | |
361b097f | 1729 | #ifdef GC_CHECK_STRING_BYTES |
e39a993c | 1730 | if (!noninteractive) |
361b097f | 1731 | { |
676a7251 GM |
1732 | if (++check_string_bytes_count == 200) |
1733 | { | |
1734 | check_string_bytes_count = 0; | |
1735 | check_string_bytes (1); | |
1736 | } | |
1737 | else | |
1738 | check_string_bytes (0); | |
361b097f | 1739 | } |
676a7251 | 1740 | #endif /* GC_CHECK_STRING_BYTES */ |
361b097f | 1741 | |
2e471eb5 | 1742 | return s; |
c0f51373 | 1743 | } |
7146af97 | 1744 | |
7146af97 | 1745 | |
2e471eb5 GM |
1746 | /* Set up Lisp_String S for holding NCHARS characters, NBYTES bytes, |
1747 | plus a NUL byte at the end. Allocate an sdata structure for S, and | |
1748 | set S->data to its `u.data' member. Store a NUL byte at the end of | |
1749 | S->data. Set S->size to NCHARS and S->size_byte to NBYTES. Free | |
1750 | S->data if it was initially non-null. */ | |
7146af97 | 1751 | |
2e471eb5 | 1752 | void |
413d18e7 EZ |
1753 | allocate_string_data (struct Lisp_String *s, |
1754 | EMACS_INT nchars, EMACS_INT nbytes) | |
7146af97 | 1755 | { |
fbe9e0b9 | 1756 | sdata *data, *old_data; |
2e471eb5 | 1757 | struct sblock *b; |
b7ffe040 | 1758 | ptrdiff_t needed, old_nbytes; |
7146af97 | 1759 | |
c9d624c6 PE |
1760 | if (STRING_BYTES_MAX < nbytes) |
1761 | string_overflow (); | |
1762 | ||
2e471eb5 GM |
1763 | /* Determine the number of bytes needed to store NBYTES bytes |
1764 | of string data. */ | |
1765 | needed = SDATA_SIZE (nbytes); | |
b7ffe040 DA |
1766 | if (s->data) |
1767 | { | |
1768 | old_data = SDATA_OF_STRING (s); | |
e499d0ee | 1769 | old_nbytes = STRING_BYTES (s); |
b7ffe040 DA |
1770 | } |
1771 | else | |
1772 | old_data = NULL; | |
e2984df0 | 1773 | |
dafc79fa | 1774 | MALLOC_BLOCK_INPUT; |
7146af97 | 1775 | |
2e471eb5 GM |
1776 | if (nbytes > LARGE_STRING_BYTES) |
1777 | { | |
91f2d272 | 1778 | size_t size = offsetof (struct sblock, data) + needed; |
2e471eb5 GM |
1779 | |
1780 | #ifdef DOUG_LEA_MALLOC | |
f20b8315 DC |
1781 | if (!mmap_lisp_allowed_p ()) |
1782 | mallopt (M_MMAP_MAX, 0); | |
2e471eb5 GM |
1783 | #endif |
1784 | ||
38182d90 | 1785 | b = lisp_malloc (size + GC_STRING_EXTRA, MEM_TYPE_NON_LISP); |
177c0ea7 | 1786 | |
2e471eb5 | 1787 | #ifdef DOUG_LEA_MALLOC |
f20b8315 DC |
1788 | if (!mmap_lisp_allowed_p ()) |
1789 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
2e471eb5 | 1790 | #endif |
177c0ea7 | 1791 | |
91f2d272 PE |
1792 | b->next_free = b->data; |
1793 | b->data[0].string = NULL; | |
2e471eb5 GM |
1794 | b->next = large_sblocks; |
1795 | large_sblocks = b; | |
1796 | } | |
1797 | else if (current_sblock == NULL | |
1798 | || (((char *) current_sblock + SBLOCK_SIZE | |
1799 | - (char *) current_sblock->next_free) | |
212f33f1 | 1800 | < (needed + GC_STRING_EXTRA))) |
2e471eb5 GM |
1801 | { |
1802 | /* Not enough room in the current sblock. */ | |
38182d90 | 1803 | b = lisp_malloc (SBLOCK_SIZE, MEM_TYPE_NON_LISP); |
91f2d272 PE |
1804 | b->next_free = b->data; |
1805 | b->data[0].string = NULL; | |
2e471eb5 GM |
1806 | b->next = NULL; |
1807 | ||
1808 | if (current_sblock) | |
1809 | current_sblock->next = b; | |
1810 | else | |
1811 | oldest_sblock = b; | |
1812 | current_sblock = b; | |
1813 | } | |
1814 | else | |
1815 | b = current_sblock; | |
5c5fecb3 | 1816 | |
2e471eb5 | 1817 | data = b->next_free; |
fbe9e0b9 | 1818 | b->next_free = (sdata *) ((char *) data + needed + GC_STRING_EXTRA); |
a0b08700 | 1819 | |
dafc79fa | 1820 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 1821 | |
2e471eb5 | 1822 | data->string = s; |
31d929e5 GM |
1823 | s->data = SDATA_DATA (data); |
1824 | #ifdef GC_CHECK_STRING_BYTES | |
1825 | SDATA_NBYTES (data) = nbytes; | |
1826 | #endif | |
2e471eb5 GM |
1827 | s->size = nchars; |
1828 | s->size_byte = nbytes; | |
1829 | s->data[nbytes] = '\0'; | |
212f33f1 | 1830 | #ifdef GC_CHECK_STRING_OVERRUN |
000098c1 PE |
1831 | memcpy ((char *) data + needed, string_overrun_cookie, |
1832 | GC_STRING_OVERRUN_COOKIE_SIZE); | |
212f33f1 | 1833 | #endif |
b7ffe040 DA |
1834 | |
1835 | /* Note that Faset may call to this function when S has already data | |
1836 | assigned. In this case, mark data as free by setting it's string | |
1837 | back-pointer to null, and record the size of the data in it. */ | |
1838 | if (old_data) | |
1839 | { | |
1840 | SDATA_NBYTES (old_data) = old_nbytes; | |
1841 | old_data->string = NULL; | |
1842 | } | |
1843 | ||
2e471eb5 GM |
1844 | consing_since_gc += needed; |
1845 | } | |
1846 | ||
1847 | ||
1848 | /* Sweep and compact strings. */ | |
1849 | ||
b029599f | 1850 | NO_INLINE /* For better stack traces */ |
2e471eb5 | 1851 | static void |
971de7fb | 1852 | sweep_strings (void) |
2e471eb5 GM |
1853 | { |
1854 | struct string_block *b, *next; | |
1855 | struct string_block *live_blocks = NULL; | |
177c0ea7 | 1856 | |
2e471eb5 GM |
1857 | string_free_list = NULL; |
1858 | total_strings = total_free_strings = 0; | |
3ab6e069 | 1859 | total_string_bytes = 0; |
2e471eb5 GM |
1860 | |
1861 | /* Scan strings_blocks, free Lisp_Strings that aren't marked. */ | |
1862 | for (b = string_blocks; b; b = next) | |
1863 | { | |
1864 | int i, nfree = 0; | |
1865 | struct Lisp_String *free_list_before = string_free_list; | |
1866 | ||
1867 | next = b->next; | |
1868 | ||
19bcad1f | 1869 | for (i = 0; i < STRING_BLOCK_SIZE; ++i) |
2e471eb5 GM |
1870 | { |
1871 | struct Lisp_String *s = b->strings + i; | |
1872 | ||
1873 | if (s->data) | |
1874 | { | |
1875 | /* String was not on free-list before. */ | |
1876 | if (STRING_MARKED_P (s)) | |
1877 | { | |
1878 | /* String is live; unmark it and its intervals. */ | |
1879 | UNMARK_STRING (s); | |
177c0ea7 | 1880 | |
8707c1e5 DA |
1881 | /* Do not use string_(set|get)_intervals here. */ |
1882 | s->intervals = balance_intervals (s->intervals); | |
2e471eb5 GM |
1883 | |
1884 | ++total_strings; | |
3ab6e069 | 1885 | total_string_bytes += STRING_BYTES (s); |
2e471eb5 GM |
1886 | } |
1887 | else | |
1888 | { | |
1889 | /* String is dead. Put it on the free-list. */ | |
fbe9e0b9 | 1890 | sdata *data = SDATA_OF_STRING (s); |
2e471eb5 GM |
1891 | |
1892 | /* Save the size of S in its sdata so that we know | |
1893 | how large that is. Reset the sdata's string | |
1894 | back-pointer so that we know it's free. */ | |
31d929e5 | 1895 | #ifdef GC_CHECK_STRING_BYTES |
e499d0ee | 1896 | if (string_bytes (s) != SDATA_NBYTES (data)) |
1088b922 | 1897 | emacs_abort (); |
31d929e5 | 1898 | #else |
fbe9e0b9 | 1899 | data->n.nbytes = STRING_BYTES (s); |
31d929e5 | 1900 | #endif |
2e471eb5 GM |
1901 | data->string = NULL; |
1902 | ||
1903 | /* Reset the strings's `data' member so that we | |
1904 | know it's free. */ | |
1905 | s->data = NULL; | |
1906 | ||
1907 | /* Put the string on the free-list. */ | |
1908 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1909 | string_free_list = s; | |
1910 | ++nfree; | |
1911 | } | |
1912 | } | |
1913 | else | |
1914 | { | |
1915 | /* S was on the free-list before. Put it there again. */ | |
1916 | NEXT_FREE_LISP_STRING (s) = string_free_list; | |
1917 | string_free_list = s; | |
1918 | ++nfree; | |
1919 | } | |
1920 | } | |
1921 | ||
34400008 | 1922 | /* Free blocks that contain free Lisp_Strings only, except |
2e471eb5 | 1923 | the first two of them. */ |
19bcad1f SM |
1924 | if (nfree == STRING_BLOCK_SIZE |
1925 | && total_free_strings > STRING_BLOCK_SIZE) | |
2e471eb5 GM |
1926 | { |
1927 | lisp_free (b); | |
2e471eb5 GM |
1928 | string_free_list = free_list_before; |
1929 | } | |
1930 | else | |
1931 | { | |
1932 | total_free_strings += nfree; | |
1933 | b->next = live_blocks; | |
1934 | live_blocks = b; | |
1935 | } | |
1936 | } | |
1937 | ||
bdbed949 | 1938 | check_string_free_list (); |
212f33f1 | 1939 | |
2e471eb5 GM |
1940 | string_blocks = live_blocks; |
1941 | free_large_strings (); | |
1942 | compact_small_strings (); | |
212f33f1 | 1943 | |
bdbed949 | 1944 | check_string_free_list (); |
2e471eb5 GM |
1945 | } |
1946 | ||
1947 | ||
1948 | /* Free dead large strings. */ | |
1949 | ||
1950 | static void | |
971de7fb | 1951 | free_large_strings (void) |
2e471eb5 GM |
1952 | { |
1953 | struct sblock *b, *next; | |
1954 | struct sblock *live_blocks = NULL; | |
177c0ea7 | 1955 | |
2e471eb5 GM |
1956 | for (b = large_sblocks; b; b = next) |
1957 | { | |
1958 | next = b->next; | |
1959 | ||
91f2d272 | 1960 | if (b->data[0].string == NULL) |
2e471eb5 GM |
1961 | lisp_free (b); |
1962 | else | |
1963 | { | |
1964 | b->next = live_blocks; | |
1965 | live_blocks = b; | |
1966 | } | |
1967 | } | |
1968 | ||
1969 | large_sblocks = live_blocks; | |
1970 | } | |
1971 | ||
1972 | ||
1973 | /* Compact data of small strings. Free sblocks that don't contain | |
1974 | data of live strings after compaction. */ | |
1975 | ||
1976 | static void | |
971de7fb | 1977 | compact_small_strings (void) |
2e471eb5 GM |
1978 | { |
1979 | struct sblock *b, *tb, *next; | |
fbe9e0b9 PE |
1980 | sdata *from, *to, *end, *tb_end; |
1981 | sdata *to_end, *from_end; | |
2e471eb5 GM |
1982 | |
1983 | /* TB is the sblock we copy to, TO is the sdata within TB we copy | |
1984 | to, and TB_END is the end of TB. */ | |
1985 | tb = oldest_sblock; | |
fbe9e0b9 | 1986 | tb_end = (sdata *) ((char *) tb + SBLOCK_SIZE); |
91f2d272 | 1987 | to = tb->data; |
2e471eb5 GM |
1988 | |
1989 | /* Step through the blocks from the oldest to the youngest. We | |
1990 | expect that old blocks will stabilize over time, so that less | |
1991 | copying will happen this way. */ | |
1992 | for (b = oldest_sblock; b; b = b->next) | |
1993 | { | |
1994 | end = b->next_free; | |
a54e2c05 | 1995 | eassert ((char *) end <= (char *) b + SBLOCK_SIZE); |
177c0ea7 | 1996 | |
91f2d272 | 1997 | for (from = b->data; from < end; from = from_end) |
2e471eb5 GM |
1998 | { |
1999 | /* Compute the next FROM here because copying below may | |
2000 | overwrite data we need to compute it. */ | |
d311d28c | 2001 | ptrdiff_t nbytes; |
e499d0ee | 2002 | struct Lisp_String *s = from->string; |
2e471eb5 | 2003 | |
31d929e5 GM |
2004 | #ifdef GC_CHECK_STRING_BYTES |
2005 | /* Check that the string size recorded in the string is the | |
b09cca6a | 2006 | same as the one recorded in the sdata structure. */ |
e499d0ee | 2007 | if (s && string_bytes (s) != SDATA_NBYTES (from)) |
1088b922 | 2008 | emacs_abort (); |
31d929e5 | 2009 | #endif /* GC_CHECK_STRING_BYTES */ |
177c0ea7 | 2010 | |
e499d0ee DA |
2011 | nbytes = s ? STRING_BYTES (s) : SDATA_NBYTES (from); |
2012 | eassert (nbytes <= LARGE_STRING_BYTES); | |
212f33f1 | 2013 | |
2e471eb5 | 2014 | nbytes = SDATA_SIZE (nbytes); |
fbe9e0b9 | 2015 | from_end = (sdata *) ((char *) from + nbytes + GC_STRING_EXTRA); |
212f33f1 KS |
2016 | |
2017 | #ifdef GC_CHECK_STRING_OVERRUN | |
72af86bd AS |
2018 | if (memcmp (string_overrun_cookie, |
2019 | (char *) from_end - GC_STRING_OVERRUN_COOKIE_SIZE, | |
2020 | GC_STRING_OVERRUN_COOKIE_SIZE)) | |
1088b922 | 2021 | emacs_abort (); |
212f33f1 | 2022 | #endif |
177c0ea7 | 2023 | |
e499d0ee DA |
2024 | /* Non-NULL S means it's alive. Copy its data. */ |
2025 | if (s) | |
2e471eb5 GM |
2026 | { |
2027 | /* If TB is full, proceed with the next sblock. */ | |
fbe9e0b9 | 2028 | to_end = (sdata *) ((char *) to + nbytes + GC_STRING_EXTRA); |
2e471eb5 GM |
2029 | if (to_end > tb_end) |
2030 | { | |
2031 | tb->next_free = to; | |
2032 | tb = tb->next; | |
fbe9e0b9 | 2033 | tb_end = (sdata *) ((char *) tb + SBLOCK_SIZE); |
91f2d272 | 2034 | to = tb->data; |
fbe9e0b9 | 2035 | to_end = (sdata *) ((char *) to + nbytes + GC_STRING_EXTRA); |
2e471eb5 | 2036 | } |
177c0ea7 | 2037 | |
2e471eb5 GM |
2038 | /* Copy, and update the string's `data' pointer. */ |
2039 | if (from != to) | |
2040 | { | |
a54e2c05 | 2041 | eassert (tb != b || to < from); |
72af86bd | 2042 | memmove (to, from, nbytes + GC_STRING_EXTRA); |
31d929e5 | 2043 | to->string->data = SDATA_DATA (to); |
2e471eb5 GM |
2044 | } |
2045 | ||
2046 | /* Advance past the sdata we copied to. */ | |
2047 | to = to_end; | |
2048 | } | |
2049 | } | |
2050 | } | |
2051 | ||
2052 | /* The rest of the sblocks following TB don't contain live data, so | |
2053 | we can free them. */ | |
2054 | for (b = tb->next; b; b = next) | |
2055 | { | |
2056 | next = b->next; | |
2057 | lisp_free (b); | |
2058 | } | |
2059 | ||
2060 | tb->next_free = to; | |
2061 | tb->next = NULL; | |
2062 | current_sblock = tb; | |
2063 | } | |
2064 | ||
cb93f9be PE |
2065 | void |
2066 | string_overflow (void) | |
2067 | { | |
2068 | error ("Maximum string size exceeded"); | |
2069 | } | |
2e471eb5 | 2070 | |
a7ca3326 | 2071 | DEFUN ("make-string", Fmake_string, Smake_string, 2, 2, 0, |
69623621 RS |
2072 | doc: /* Return a newly created string of length LENGTH, with INIT in each element. |
2073 | LENGTH must be an integer. | |
2074 | INIT must be an integer that represents a character. */) | |
5842a27b | 2075 | (Lisp_Object length, Lisp_Object init) |
2e471eb5 GM |
2076 | { |
2077 | register Lisp_Object val; | |
14162469 EZ |
2078 | int c; |
2079 | EMACS_INT nbytes; | |
2e471eb5 | 2080 | |
b7826503 | 2081 | CHECK_NATNUM (length); |
2bccce07 | 2082 | CHECK_CHARACTER (init); |
2e471eb5 | 2083 | |
2bccce07 | 2084 | c = XFASTINT (init); |
830ff83b | 2085 | if (ASCII_CHAR_P (c)) |
2e471eb5 GM |
2086 | { |
2087 | nbytes = XINT (length); | |
2088 | val = make_uninit_string (nbytes); | |
3c439e0a DA |
2089 | memset (SDATA (val), c, nbytes); |
2090 | SDATA (val)[nbytes] = 0; | |
2e471eb5 GM |
2091 | } |
2092 | else | |
2093 | { | |
d942b71c | 2094 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
cc593f54 | 2095 | ptrdiff_t len = CHAR_STRING (c, str); |
14162469 | 2096 | EMACS_INT string_len = XINT (length); |
3c439e0a | 2097 | unsigned char *p, *beg, *end; |
2e471eb5 | 2098 | |
d1f3d2af | 2099 | if (string_len > STRING_BYTES_MAX / len) |
cb93f9be | 2100 | string_overflow (); |
14162469 EZ |
2101 | nbytes = len * string_len; |
2102 | val = make_uninit_multibyte_string (string_len, nbytes); | |
3c439e0a | 2103 | for (beg = SDATA (val), p = beg, end = beg + nbytes; p < end; p += len) |
2e471eb5 | 2104 | { |
3c439e0a DA |
2105 | /* First time we just copy `str' to the data of `val'. */ |
2106 | if (p == beg) | |
2107 | memcpy (p, str, len); | |
2108 | else | |
2109 | { | |
2110 | /* Next time we copy largest possible chunk from | |
2111 | initialized to uninitialized part of `val'. */ | |
2112 | len = min (p - beg, end - p); | |
2113 | memcpy (p, beg, len); | |
2114 | } | |
2e471eb5 | 2115 | } |
3c439e0a | 2116 | *p = 0; |
2e471eb5 | 2117 | } |
177c0ea7 | 2118 | |
2e471eb5 GM |
2119 | return val; |
2120 | } | |
2121 | ||
2cf00efc PE |
2122 | /* Fill A with 1 bits if INIT is non-nil, and with 0 bits otherwise. |
2123 | Return A. */ | |
3e0b94e7 | 2124 | |
2cf00efc | 2125 | Lisp_Object |
df5b4930 PE |
2126 | bool_vector_fill (Lisp_Object a, Lisp_Object init) |
2127 | { | |
2128 | EMACS_INT nbits = bool_vector_size (a); | |
2129 | if (0 < nbits) | |
3e0b94e7 | 2130 | { |
df5b4930 PE |
2131 | unsigned char *data = bool_vector_uchar_data (a); |
2132 | int pattern = NILP (init) ? 0 : (1 << BOOL_VECTOR_BITS_PER_CHAR) - 1; | |
2cf00efc | 2133 | ptrdiff_t nbytes = bool_vector_bytes (nbits); |
6ab1b16c | 2134 | int last_mask = ~ (~0u << ((nbits - 1) % BOOL_VECTOR_BITS_PER_CHAR + 1)); |
df5b4930 PE |
2135 | memset (data, pattern, nbytes - 1); |
2136 | data[nbytes - 1] = pattern & last_mask; | |
3e0b94e7 | 2137 | } |
2cf00efc | 2138 | return a; |
3e0b94e7 | 2139 | } |
2e471eb5 | 2140 | |
2cf00efc PE |
2141 | /* Return a newly allocated, uninitialized bool vector of size NBITS. */ |
2142 | ||
2143 | Lisp_Object | |
2144 | make_uninit_bool_vector (EMACS_INT nbits) | |
2e471eb5 | 2145 | { |
df5b4930 | 2146 | Lisp_Object val; |
75360f19 | 2147 | EMACS_INT words = bool_vector_words (nbits); |
87d86601 PE |
2148 | EMACS_INT word_bytes = words * sizeof (bits_word); |
2149 | EMACS_INT needed_elements = ((bool_header_size - header_size + word_bytes | |
2150 | + word_size - 1) | |
2151 | / word_size); | |
2152 | struct Lisp_Bool_Vector *p | |
2153 | = (struct Lisp_Bool_Vector *) allocate_vector (needed_elements); | |
3e0b94e7 | 2154 | XSETVECTOR (val, p); |
914adc42 | 2155 | XSETPVECTYPESIZE (XVECTOR (val), PVEC_BOOL_VECTOR, 0, 0); |
2cf00efc | 2156 | p->size = nbits; |
2e471eb5 | 2157 | |
75360f19 PE |
2158 | /* Clear padding at the end. */ |
2159 | if (words) | |
2160 | p->data[words - 1] = 0; | |
3e0b94e7 | 2161 | |
2e471eb5 GM |
2162 | return val; |
2163 | } | |
2164 | ||
2cf00efc PE |
2165 | DEFUN ("make-bool-vector", Fmake_bool_vector, Smake_bool_vector, 2, 2, 0, |
2166 | doc: /* Return a new bool-vector of length LENGTH, using INIT for each element. | |
2167 | LENGTH must be a number. INIT matters only in whether it is t or nil. */) | |
2168 | (Lisp_Object length, Lisp_Object init) | |
2169 | { | |
2170 | Lisp_Object val; | |
2171 | ||
2172 | CHECK_NATNUM (length); | |
2173 | val = make_uninit_bool_vector (XFASTINT (length)); | |
2174 | return bool_vector_fill (val, init); | |
2175 | } | |
2176 | ||
2e471eb5 GM |
2177 | |
2178 | /* Make a string from NBYTES bytes at CONTENTS, and compute the number | |
2179 | of characters from the contents. This string may be unibyte or | |
2180 | multibyte, depending on the contents. */ | |
2181 | ||
2182 | Lisp_Object | |
d311d28c | 2183 | make_string (const char *contents, ptrdiff_t nbytes) |
2e471eb5 GM |
2184 | { |
2185 | register Lisp_Object val; | |
d311d28c | 2186 | ptrdiff_t nchars, multibyte_nbytes; |
9eac9d59 | 2187 | |
90256841 PE |
2188 | parse_str_as_multibyte ((const unsigned char *) contents, nbytes, |
2189 | &nchars, &multibyte_nbytes); | |
9eac9d59 KH |
2190 | if (nbytes == nchars || nbytes != multibyte_nbytes) |
2191 | /* CONTENTS contains no multibyte sequences or contains an invalid | |
2192 | multibyte sequence. We must make unibyte string. */ | |
495a6df3 KH |
2193 | val = make_unibyte_string (contents, nbytes); |
2194 | else | |
2195 | val = make_multibyte_string (contents, nchars, nbytes); | |
2e471eb5 GM |
2196 | return val; |
2197 | } | |
2198 | ||
2199 | ||
2200 | /* Make an unibyte string from LENGTH bytes at CONTENTS. */ | |
2201 | ||
2202 | Lisp_Object | |
d311d28c | 2203 | make_unibyte_string (const char *contents, ptrdiff_t length) |
2e471eb5 GM |
2204 | { |
2205 | register Lisp_Object val; | |
2206 | val = make_uninit_string (length); | |
72af86bd | 2207 | memcpy (SDATA (val), contents, length); |
2e471eb5 GM |
2208 | return val; |
2209 | } | |
2210 | ||
2211 | ||
2212 | /* Make a multibyte string from NCHARS characters occupying NBYTES | |
2213 | bytes at CONTENTS. */ | |
2214 | ||
2215 | Lisp_Object | |
14162469 | 2216 | make_multibyte_string (const char *contents, |
d311d28c | 2217 | ptrdiff_t nchars, ptrdiff_t nbytes) |
2e471eb5 GM |
2218 | { |
2219 | register Lisp_Object val; | |
2220 | val = make_uninit_multibyte_string (nchars, nbytes); | |
72af86bd | 2221 | memcpy (SDATA (val), contents, nbytes); |
2e471eb5 GM |
2222 | return val; |
2223 | } | |
2224 | ||
2225 | ||
2226 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
2227 | CONTENTS. It is a multibyte string if NBYTES != NCHARS. */ | |
2228 | ||
2229 | Lisp_Object | |
14162469 | 2230 | make_string_from_bytes (const char *contents, |
d311d28c | 2231 | ptrdiff_t nchars, ptrdiff_t nbytes) |
2e471eb5 GM |
2232 | { |
2233 | register Lisp_Object val; | |
2234 | val = make_uninit_multibyte_string (nchars, nbytes); | |
72af86bd | 2235 | memcpy (SDATA (val), contents, nbytes); |
d5db4077 KR |
2236 | if (SBYTES (val) == SCHARS (val)) |
2237 | STRING_SET_UNIBYTE (val); | |
2e471eb5 GM |
2238 | return val; |
2239 | } | |
2240 | ||
2241 | ||
2242 | /* Make a string from NCHARS characters occupying NBYTES bytes at | |
2243 | CONTENTS. The argument MULTIBYTE controls whether to label the | |
229b28c4 KH |
2244 | string as multibyte. If NCHARS is negative, it counts the number of |
2245 | characters by itself. */ | |
2e471eb5 GM |
2246 | |
2247 | Lisp_Object | |
14162469 | 2248 | make_specified_string (const char *contents, |
fce31d69 | 2249 | ptrdiff_t nchars, ptrdiff_t nbytes, bool multibyte) |
2e471eb5 | 2250 | { |
fce31d69 | 2251 | Lisp_Object val; |
229b28c4 KH |
2252 | |
2253 | if (nchars < 0) | |
2254 | { | |
2255 | if (multibyte) | |
90256841 PE |
2256 | nchars = multibyte_chars_in_text ((const unsigned char *) contents, |
2257 | nbytes); | |
229b28c4 KH |
2258 | else |
2259 | nchars = nbytes; | |
2260 | } | |
2e471eb5 | 2261 | val = make_uninit_multibyte_string (nchars, nbytes); |
72af86bd | 2262 | memcpy (SDATA (val), contents, nbytes); |
2e471eb5 | 2263 | if (!multibyte) |
d5db4077 | 2264 | STRING_SET_UNIBYTE (val); |
2e471eb5 GM |
2265 | return val; |
2266 | } | |
2267 | ||
2268 | ||
2e471eb5 GM |
2269 | /* Return an unibyte Lisp_String set up to hold LENGTH characters |
2270 | occupying LENGTH bytes. */ | |
2271 | ||
2272 | Lisp_Object | |
413d18e7 | 2273 | make_uninit_string (EMACS_INT length) |
2e471eb5 GM |
2274 | { |
2275 | Lisp_Object val; | |
4d774b0f JB |
2276 | |
2277 | if (!length) | |
2278 | return empty_unibyte_string; | |
2e471eb5 | 2279 | val = make_uninit_multibyte_string (length, length); |
d5db4077 | 2280 | STRING_SET_UNIBYTE (val); |
2e471eb5 GM |
2281 | return val; |
2282 | } | |
2283 | ||
2284 | ||
2285 | /* Return a multibyte Lisp_String set up to hold NCHARS characters | |
2286 | which occupy NBYTES bytes. */ | |
2287 | ||
2288 | Lisp_Object | |
413d18e7 | 2289 | make_uninit_multibyte_string (EMACS_INT nchars, EMACS_INT nbytes) |
2e471eb5 GM |
2290 | { |
2291 | Lisp_Object string; | |
2292 | struct Lisp_String *s; | |
2293 | ||
2294 | if (nchars < 0) | |
1088b922 | 2295 | emacs_abort (); |
4d774b0f JB |
2296 | if (!nbytes) |
2297 | return empty_multibyte_string; | |
2e471eb5 GM |
2298 | |
2299 | s = allocate_string (); | |
77c7bcb1 | 2300 | s->intervals = NULL; |
2e471eb5 GM |
2301 | allocate_string_data (s, nchars, nbytes); |
2302 | XSETSTRING (string, s); | |
2303 | string_chars_consed += nbytes; | |
2304 | return string; | |
2305 | } | |
2306 | ||
a8290ec3 DA |
2307 | /* Print arguments to BUF according to a FORMAT, then return |
2308 | a Lisp_String initialized with the data from BUF. */ | |
2309 | ||
2310 | Lisp_Object | |
2311 | make_formatted_string (char *buf, const char *format, ...) | |
2312 | { | |
2313 | va_list ap; | |
26bccfae | 2314 | int length; |
a8290ec3 DA |
2315 | |
2316 | va_start (ap, format); | |
2317 | length = vsprintf (buf, format, ap); | |
2318 | va_end (ap); | |
2319 | return make_string (buf, length); | |
2320 | } | |
2e471eb5 GM |
2321 | |
2322 | \f | |
2323 | /*********************************************************************** | |
2324 | Float Allocation | |
2325 | ***********************************************************************/ | |
2326 | ||
2e471eb5 GM |
2327 | /* We store float cells inside of float_blocks, allocating a new |
2328 | float_block with malloc whenever necessary. Float cells reclaimed | |
2329 | by GC are put on a free list to be reallocated before allocating | |
ab6780cd | 2330 | any new float cells from the latest float_block. */ |
2e471eb5 | 2331 | |
6b61353c KH |
2332 | #define FLOAT_BLOCK_SIZE \ |
2333 | (((BLOCK_BYTES - sizeof (struct float_block *) \ | |
2334 | /* The compiler might add padding at the end. */ \ | |
9c23779a | 2335 | - (sizeof (struct Lisp_Float) - sizeof (bits_word))) * CHAR_BIT) \ |
ab6780cd SM |
2336 | / (sizeof (struct Lisp_Float) * CHAR_BIT + 1)) |
2337 | ||
2338 | #define GETMARKBIT(block,n) \ | |
9c23779a PE |
2339 | (((block)->gcmarkbits[(n) / BITS_PER_BITS_WORD] \ |
2340 | >> ((n) % BITS_PER_BITS_WORD)) \ | |
ab6780cd SM |
2341 | & 1) |
2342 | ||
2343 | #define SETMARKBIT(block,n) \ | |
9c23779a PE |
2344 | ((block)->gcmarkbits[(n) / BITS_PER_BITS_WORD] \ |
2345 | |= (bits_word) 1 << ((n) % BITS_PER_BITS_WORD)) | |
ab6780cd SM |
2346 | |
2347 | #define UNSETMARKBIT(block,n) \ | |
9c23779a PE |
2348 | ((block)->gcmarkbits[(n) / BITS_PER_BITS_WORD] \ |
2349 | &= ~((bits_word) 1 << ((n) % BITS_PER_BITS_WORD))) | |
ab6780cd SM |
2350 | |
2351 | #define FLOAT_BLOCK(fptr) \ | |
d01a7826 | 2352 | ((struct float_block *) (((uintptr_t) (fptr)) & ~(BLOCK_ALIGN - 1))) |
ab6780cd SM |
2353 | |
2354 | #define FLOAT_INDEX(fptr) \ | |
d01a7826 | 2355 | ((((uintptr_t) (fptr)) & (BLOCK_ALIGN - 1)) / sizeof (struct Lisp_Float)) |
2e471eb5 GM |
2356 | |
2357 | struct float_block | |
2358 | { | |
ab6780cd | 2359 | /* Place `floats' at the beginning, to ease up FLOAT_INDEX's job. */ |
2e471eb5 | 2360 | struct Lisp_Float floats[FLOAT_BLOCK_SIZE]; |
9c23779a | 2361 | bits_word gcmarkbits[1 + FLOAT_BLOCK_SIZE / BITS_PER_BITS_WORD]; |
ab6780cd | 2362 | struct float_block *next; |
2e471eb5 GM |
2363 | }; |
2364 | ||
ab6780cd SM |
2365 | #define FLOAT_MARKED_P(fptr) \ |
2366 | GETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2367 | ||
2368 | #define FLOAT_MARK(fptr) \ | |
2369 | SETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2370 | ||
2371 | #define FLOAT_UNMARK(fptr) \ | |
2372 | UNSETMARKBIT (FLOAT_BLOCK (fptr), FLOAT_INDEX ((fptr))) | |
2373 | ||
34400008 GM |
2374 | /* Current float_block. */ |
2375 | ||
244ed907 | 2376 | static struct float_block *float_block; |
34400008 GM |
2377 | |
2378 | /* Index of first unused Lisp_Float in the current float_block. */ | |
2379 | ||
fff62aa9 | 2380 | static int float_block_index = FLOAT_BLOCK_SIZE; |
2e471eb5 | 2381 | |
34400008 GM |
2382 | /* Free-list of Lisp_Floats. */ |
2383 | ||
244ed907 | 2384 | static struct Lisp_Float *float_free_list; |
2e471eb5 | 2385 | |
34400008 GM |
2386 | /* Return a new float object with value FLOAT_VALUE. */ |
2387 | ||
2e471eb5 | 2388 | Lisp_Object |
971de7fb | 2389 | make_float (double float_value) |
2e471eb5 GM |
2390 | { |
2391 | register Lisp_Object val; | |
2392 | ||
dafc79fa | 2393 | MALLOC_BLOCK_INPUT; |
cfb2f32e | 2394 | |
2e471eb5 GM |
2395 | if (float_free_list) |
2396 | { | |
2397 | /* We use the data field for chaining the free list | |
2398 | so that we won't use the same field that has the mark bit. */ | |
2399 | XSETFLOAT (val, float_free_list); | |
28a099a4 | 2400 | float_free_list = float_free_list->u.chain; |
2e471eb5 GM |
2401 | } |
2402 | else | |
2403 | { | |
2404 | if (float_block_index == FLOAT_BLOCK_SIZE) | |
2405 | { | |
38182d90 PE |
2406 | struct float_block *new |
2407 | = lisp_align_malloc (sizeof *new, MEM_TYPE_FLOAT); | |
2e471eb5 | 2408 | new->next = float_block; |
72af86bd | 2409 | memset (new->gcmarkbits, 0, sizeof new->gcmarkbits); |
2e471eb5 GM |
2410 | float_block = new; |
2411 | float_block_index = 0; | |
3900d5de | 2412 | total_free_floats += FLOAT_BLOCK_SIZE; |
2e471eb5 | 2413 | } |
6b61353c KH |
2414 | XSETFLOAT (val, &float_block->floats[float_block_index]); |
2415 | float_block_index++; | |
2e471eb5 | 2416 | } |
177c0ea7 | 2417 | |
dafc79fa | 2418 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 2419 | |
f601cdf3 | 2420 | XFLOAT_INIT (val, float_value); |
6b61353c | 2421 | eassert (!FLOAT_MARKED_P (XFLOAT (val))); |
2e471eb5 GM |
2422 | consing_since_gc += sizeof (struct Lisp_Float); |
2423 | floats_consed++; | |
3900d5de | 2424 | total_free_floats--; |
2e471eb5 GM |
2425 | return val; |
2426 | } | |
2427 | ||
2e471eb5 GM |
2428 | |
2429 | \f | |
2430 | /*********************************************************************** | |
2431 | Cons Allocation | |
2432 | ***********************************************************************/ | |
2433 | ||
2434 | /* We store cons cells inside of cons_blocks, allocating a new | |
2435 | cons_block with malloc whenever necessary. Cons cells reclaimed by | |
2436 | GC are put on a free list to be reallocated before allocating | |
08b7c2cb | 2437 | any new cons cells from the latest cons_block. */ |
2e471eb5 | 2438 | |
a2821611 AS |
2439 | #define CONS_BLOCK_SIZE \ |
2440 | (((BLOCK_BYTES - sizeof (struct cons_block *) \ | |
2441 | /* The compiler might add padding at the end. */ \ | |
9c23779a | 2442 | - (sizeof (struct Lisp_Cons) - sizeof (bits_word))) * CHAR_BIT) \ |
08b7c2cb SM |
2443 | / (sizeof (struct Lisp_Cons) * CHAR_BIT + 1)) |
2444 | ||
2445 | #define CONS_BLOCK(fptr) \ | |
d01a7826 | 2446 | ((struct cons_block *) ((uintptr_t) (fptr) & ~(BLOCK_ALIGN - 1))) |
08b7c2cb SM |
2447 | |
2448 | #define CONS_INDEX(fptr) \ | |
d01a7826 | 2449 | (((uintptr_t) (fptr) & (BLOCK_ALIGN - 1)) / sizeof (struct Lisp_Cons)) |
2e471eb5 GM |
2450 | |
2451 | struct cons_block | |
2452 | { | |
08b7c2cb | 2453 | /* Place `conses' at the beginning, to ease up CONS_INDEX's job. */ |
2e471eb5 | 2454 | struct Lisp_Cons conses[CONS_BLOCK_SIZE]; |
9c23779a | 2455 | bits_word gcmarkbits[1 + CONS_BLOCK_SIZE / BITS_PER_BITS_WORD]; |
08b7c2cb | 2456 | struct cons_block *next; |
2e471eb5 GM |
2457 | }; |
2458 | ||
08b7c2cb SM |
2459 | #define CONS_MARKED_P(fptr) \ |
2460 | GETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2461 | ||
2462 | #define CONS_MARK(fptr) \ | |
2463 | SETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2464 | ||
2465 | #define CONS_UNMARK(fptr) \ | |
2466 | UNSETMARKBIT (CONS_BLOCK (fptr), CONS_INDEX ((fptr))) | |
2467 | ||
34400008 GM |
2468 | /* Current cons_block. */ |
2469 | ||
244ed907 | 2470 | static struct cons_block *cons_block; |
34400008 GM |
2471 | |
2472 | /* Index of first unused Lisp_Cons in the current block. */ | |
2473 | ||
fff62aa9 | 2474 | static int cons_block_index = CONS_BLOCK_SIZE; |
2e471eb5 | 2475 | |
34400008 GM |
2476 | /* Free-list of Lisp_Cons structures. */ |
2477 | ||
244ed907 | 2478 | static struct Lisp_Cons *cons_free_list; |
2e471eb5 | 2479 | |
34400008 | 2480 | /* Explicitly free a cons cell by putting it on the free-list. */ |
2e471eb5 GM |
2481 | |
2482 | void | |
971de7fb | 2483 | free_cons (struct Lisp_Cons *ptr) |
2e471eb5 | 2484 | { |
28a099a4 | 2485 | ptr->u.chain = cons_free_list; |
34400008 | 2486 | #if GC_MARK_STACK |
c644523b | 2487 | ptr->car = Vdead; |
34400008 | 2488 | #endif |
2e471eb5 | 2489 | cons_free_list = ptr; |
0dd6d66d | 2490 | consing_since_gc -= sizeof *ptr; |
3900d5de | 2491 | total_free_conses++; |
2e471eb5 GM |
2492 | } |
2493 | ||
a7ca3326 | 2494 | DEFUN ("cons", Fcons, Scons, 2, 2, 0, |
a6266d23 | 2495 | doc: /* Create a new cons, give it CAR and CDR as components, and return it. */) |
5842a27b | 2496 | (Lisp_Object car, Lisp_Object cdr) |
2e471eb5 GM |
2497 | { |
2498 | register Lisp_Object val; | |
2499 | ||
dafc79fa | 2500 | MALLOC_BLOCK_INPUT; |
cfb2f32e | 2501 | |
2e471eb5 GM |
2502 | if (cons_free_list) |
2503 | { | |
2504 | /* We use the cdr for chaining the free list | |
2505 | so that we won't use the same field that has the mark bit. */ | |
2506 | XSETCONS (val, cons_free_list); | |
28a099a4 | 2507 | cons_free_list = cons_free_list->u.chain; |
2e471eb5 GM |
2508 | } |
2509 | else | |
2510 | { | |
2511 | if (cons_block_index == CONS_BLOCK_SIZE) | |
2512 | { | |
38182d90 PE |
2513 | struct cons_block *new |
2514 | = lisp_align_malloc (sizeof *new, MEM_TYPE_CONS); | |
72af86bd | 2515 | memset (new->gcmarkbits, 0, sizeof new->gcmarkbits); |
2e471eb5 GM |
2516 | new->next = cons_block; |
2517 | cons_block = new; | |
2518 | cons_block_index = 0; | |
3900d5de | 2519 | total_free_conses += CONS_BLOCK_SIZE; |
2e471eb5 | 2520 | } |
6b61353c KH |
2521 | XSETCONS (val, &cons_block->conses[cons_block_index]); |
2522 | cons_block_index++; | |
2e471eb5 | 2523 | } |
177c0ea7 | 2524 | |
dafc79fa | 2525 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 2526 | |
f3fbd155 KR |
2527 | XSETCAR (val, car); |
2528 | XSETCDR (val, cdr); | |
6b61353c | 2529 | eassert (!CONS_MARKED_P (XCONS (val))); |
2e471eb5 | 2530 | consing_since_gc += sizeof (struct Lisp_Cons); |
3900d5de | 2531 | total_free_conses--; |
2e471eb5 GM |
2532 | cons_cells_consed++; |
2533 | return val; | |
2534 | } | |
2535 | ||
e5aab7e7 | 2536 | #ifdef GC_CHECK_CONS_LIST |
e3e56238 RS |
2537 | /* Get an error now if there's any junk in the cons free list. */ |
2538 | void | |
971de7fb | 2539 | check_cons_list (void) |
e3e56238 RS |
2540 | { |
2541 | struct Lisp_Cons *tail = cons_free_list; | |
2542 | ||
e3e56238 | 2543 | while (tail) |
28a099a4 | 2544 | tail = tail->u.chain; |
e3e56238 | 2545 | } |
e5aab7e7 | 2546 | #endif |
34400008 | 2547 | |
9b306d37 KS |
2548 | /* Make a list of 1, 2, 3, 4 or 5 specified objects. */ |
2549 | ||
2550 | Lisp_Object | |
971de7fb | 2551 | list1 (Lisp_Object arg1) |
9b306d37 KS |
2552 | { |
2553 | return Fcons (arg1, Qnil); | |
2554 | } | |
2e471eb5 GM |
2555 | |
2556 | Lisp_Object | |
971de7fb | 2557 | list2 (Lisp_Object arg1, Lisp_Object arg2) |
2e471eb5 GM |
2558 | { |
2559 | return Fcons (arg1, Fcons (arg2, Qnil)); | |
2560 | } | |
2561 | ||
34400008 | 2562 | |
2e471eb5 | 2563 | Lisp_Object |
971de7fb | 2564 | list3 (Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
2e471eb5 GM |
2565 | { |
2566 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Qnil))); | |
2567 | } | |
2568 | ||
34400008 | 2569 | |
2e471eb5 | 2570 | Lisp_Object |
971de7fb | 2571 | list4 (Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, Lisp_Object arg4) |
2e471eb5 GM |
2572 | { |
2573 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, Qnil)))); | |
2574 | } | |
2575 | ||
34400008 | 2576 | |
2e471eb5 | 2577 | Lisp_Object |
971de7fb | 2578 | list5 (Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5) |
2e471eb5 GM |
2579 | { |
2580 | return Fcons (arg1, Fcons (arg2, Fcons (arg3, Fcons (arg4, | |
2581 | Fcons (arg5, Qnil))))); | |
2582 | } | |
2583 | ||
694b6c97 DA |
2584 | /* Make a list of COUNT Lisp_Objects, where ARG is the |
2585 | first one. Allocate conses from pure space if TYPE | |
3438fe21 | 2586 | is CONSTYPE_PURE, or allocate as usual if type is CONSTYPE_HEAP. */ |
694b6c97 DA |
2587 | |
2588 | Lisp_Object | |
2589 | listn (enum constype type, ptrdiff_t count, Lisp_Object arg, ...) | |
2590 | { | |
2591 | va_list ap; | |
2592 | ptrdiff_t i; | |
2593 | Lisp_Object val, *objp; | |
2594 | ||
2595 | /* Change to SAFE_ALLOCA if you hit this eassert. */ | |
663e2b3f | 2596 | eassert (count <= MAX_ALLOCA / word_size); |
694b6c97 | 2597 | |
663e2b3f | 2598 | objp = alloca (count * word_size); |
694b6c97 DA |
2599 | objp[0] = arg; |
2600 | va_start (ap, arg); | |
2601 | for (i = 1; i < count; i++) | |
2602 | objp[i] = va_arg (ap, Lisp_Object); | |
2603 | va_end (ap); | |
2604 | ||
bcfbc9de | 2605 | for (val = Qnil, i = count - 1; i >= 0; i--) |
694b6c97 | 2606 | { |
3438fe21 | 2607 | if (type == CONSTYPE_PURE) |
694b6c97 | 2608 | val = pure_cons (objp[i], val); |
3438fe21 | 2609 | else if (type == CONSTYPE_HEAP) |
694b6c97 DA |
2610 | val = Fcons (objp[i], val); |
2611 | else | |
1088b922 | 2612 | emacs_abort (); |
694b6c97 DA |
2613 | } |
2614 | return val; | |
2615 | } | |
34400008 | 2616 | |
a7ca3326 | 2617 | DEFUN ("list", Flist, Slist, 0, MANY, 0, |
eae936e2 | 2618 | doc: /* Return a newly created list with specified arguments as elements. |
ae8e8122 MB |
2619 | Any number of arguments, even zero arguments, are allowed. |
2620 | usage: (list &rest OBJECTS) */) | |
f66c7cf8 | 2621 | (ptrdiff_t nargs, Lisp_Object *args) |
2e471eb5 GM |
2622 | { |
2623 | register Lisp_Object val; | |
2624 | val = Qnil; | |
2625 | ||
2626 | while (nargs > 0) | |
2627 | { | |
2628 | nargs--; | |
2629 | val = Fcons (args[nargs], val); | |
2630 | } | |
2631 | return val; | |
2632 | } | |
2633 | ||
34400008 | 2634 | |
a7ca3326 | 2635 | DEFUN ("make-list", Fmake_list, Smake_list, 2, 2, 0, |
a6266d23 | 2636 | doc: /* Return a newly created list of length LENGTH, with each element being INIT. */) |
5842a27b | 2637 | (register Lisp_Object length, Lisp_Object init) |
2e471eb5 GM |
2638 | { |
2639 | register Lisp_Object val; | |
14162469 | 2640 | register EMACS_INT size; |
2e471eb5 | 2641 | |
b7826503 | 2642 | CHECK_NATNUM (length); |
2e471eb5 GM |
2643 | size = XFASTINT (length); |
2644 | ||
2645 | val = Qnil; | |
ce070307 GM |
2646 | while (size > 0) |
2647 | { | |
2648 | val = Fcons (init, val); | |
2649 | --size; | |
2650 | ||
2651 | if (size > 0) | |
2652 | { | |
2653 | val = Fcons (init, val); | |
2654 | --size; | |
177c0ea7 | 2655 | |
ce070307 GM |
2656 | if (size > 0) |
2657 | { | |
2658 | val = Fcons (init, val); | |
2659 | --size; | |
177c0ea7 | 2660 | |
ce070307 GM |
2661 | if (size > 0) |
2662 | { | |
2663 | val = Fcons (init, val); | |
2664 | --size; | |
177c0ea7 | 2665 | |
ce070307 GM |
2666 | if (size > 0) |
2667 | { | |
2668 | val = Fcons (init, val); | |
2669 | --size; | |
2670 | } | |
2671 | } | |
2672 | } | |
2673 | } | |
2674 | ||
2675 | QUIT; | |
2676 | } | |
177c0ea7 | 2677 | |
7146af97 JB |
2678 | return val; |
2679 | } | |
2e471eb5 GM |
2680 | |
2681 | ||
7146af97 | 2682 | \f |
2e471eb5 GM |
2683 | /*********************************************************************** |
2684 | Vector Allocation | |
2685 | ***********************************************************************/ | |
7146af97 | 2686 | |
91f2d272 | 2687 | /* Sometimes a vector's contents are merely a pointer internally used |
13a5993b PE |
2688 | in vector allocation code. On the rare platforms where a null |
2689 | pointer cannot be tagged, represent it with a Lisp 0. | |
2690 | Usually you don't want to touch this. */ | |
91f2d272 PE |
2691 | |
2692 | static struct Lisp_Vector * | |
2693 | next_vector (struct Lisp_Vector *v) | |
2694 | { | |
2695 | return XUNTAG (v->contents[0], 0); | |
2696 | } | |
2697 | ||
2698 | static void | |
2699 | set_next_vector (struct Lisp_Vector *v, struct Lisp_Vector *p) | |
2700 | { | |
2701 | v->contents[0] = make_lisp_ptr (p, 0); | |
2702 | } | |
2703 | ||
f3372c87 DA |
2704 | /* This value is balanced well enough to avoid too much internal overhead |
2705 | for the most common cases; it's not required to be a power of two, but | |
2706 | it's expected to be a mult-of-ROUNDUP_SIZE (see below). */ | |
34400008 | 2707 | |
f3372c87 | 2708 | #define VECTOR_BLOCK_SIZE 4096 |
7146af97 | 2709 | |
dd0b0efb PE |
2710 | enum |
2711 | { | |
91f2d272 PE |
2712 | /* Alignment of struct Lisp_Vector objects. */ |
2713 | vector_alignment = COMMON_MULTIPLE (ALIGNOF_STRUCT_LISP_VECTOR, | |
2714 | USE_LSB_TAG ? GCALIGNMENT : 1), | |
2715 | ||
2716 | /* Vector size requests are a multiple of this. */ | |
2717 | roundup_size = COMMON_MULTIPLE (vector_alignment, word_size) | |
dd0b0efb | 2718 | }; |
34400008 | 2719 | |
ca95b3eb DA |
2720 | /* Verify assumptions described above. */ |
2721 | verify ((VECTOR_BLOCK_SIZE % roundup_size) == 0); | |
ee28be33 | 2722 | verify (VECTOR_BLOCK_SIZE <= (1 << PSEUDOVECTOR_SIZE_BITS)); |
ca95b3eb | 2723 | |
3e0b94e7 | 2724 | /* Round up X to nearest mult-of-ROUNDUP_SIZE --- use at compile time. */ |
df5b4930 | 2725 | #define vroundup_ct(x) ROUNDUP (x, roundup_size) |
3e0b94e7 | 2726 | /* Round up X to nearest mult-of-ROUNDUP_SIZE --- use at runtime. */ |
b9ff995e | 2727 | #define vroundup(x) (eassume ((x) >= 0), vroundup_ct (x)) |
f3372c87 DA |
2728 | |
2729 | /* Rounding helps to maintain alignment constraints if USE_LSB_TAG. */ | |
2730 | ||
3e0b94e7 | 2731 | #define VECTOR_BLOCK_BYTES (VECTOR_BLOCK_SIZE - vroundup_ct (sizeof (void *))) |
f3372c87 DA |
2732 | |
2733 | /* Size of the minimal vector allocated from block. */ | |
2734 | ||
3e0b94e7 | 2735 | #define VBLOCK_BYTES_MIN vroundup_ct (header_size + sizeof (Lisp_Object)) |
f3372c87 DA |
2736 | |
2737 | /* Size of the largest vector allocated from block. */ | |
2738 | ||
2739 | #define VBLOCK_BYTES_MAX \ | |
d06714cb | 2740 | vroundup ((VECTOR_BLOCK_BYTES / 2) - word_size) |
f3372c87 DA |
2741 | |
2742 | /* We maintain one free list for each possible block-allocated | |
2743 | vector size, and this is the number of free lists we have. */ | |
2744 | ||
2745 | #define VECTOR_MAX_FREE_LIST_INDEX \ | |
2746 | ((VECTOR_BLOCK_BYTES - VBLOCK_BYTES_MIN) / roundup_size + 1) | |
2747 | ||
f3372c87 DA |
2748 | /* Common shortcut to advance vector pointer over a block data. */ |
2749 | ||
2750 | #define ADVANCE(v, nbytes) ((struct Lisp_Vector *) ((char *) (v) + (nbytes))) | |
2751 | ||
2752 | /* Common shortcut to calculate NBYTES-vector index in VECTOR_FREE_LISTS. */ | |
2753 | ||
2754 | #define VINDEX(nbytes) (((nbytes) - VBLOCK_BYTES_MIN) / roundup_size) | |
2755 | ||
2756 | /* Common shortcut to setup vector on a free list. */ | |
2757 | ||
914adc42 DA |
2758 | #define SETUP_ON_FREE_LIST(v, nbytes, tmp) \ |
2759 | do { \ | |
2760 | (tmp) = ((nbytes - header_size) / word_size); \ | |
2761 | XSETPVECTYPESIZE (v, PVEC_FREE, 0, (tmp)); \ | |
2762 | eassert ((nbytes) % roundup_size == 0); \ | |
2763 | (tmp) = VINDEX (nbytes); \ | |
2764 | eassert ((tmp) < VECTOR_MAX_FREE_LIST_INDEX); \ | |
91f2d272 | 2765 | set_next_vector (v, vector_free_lists[tmp]); \ |
914adc42 DA |
2766 | vector_free_lists[tmp] = (v); \ |
2767 | total_free_vector_slots += (nbytes) / word_size; \ | |
f3372c87 DA |
2768 | } while (0) |
2769 | ||
914adc42 | 2770 | /* This internal type is used to maintain the list of large vectors |
91f2d272 PE |
2771 | which are allocated at their own, e.g. outside of vector blocks. |
2772 | ||
2773 | struct large_vector itself cannot contain a struct Lisp_Vector, as | |
2774 | the latter contains a flexible array member and C99 does not allow | |
2775 | such structs to be nested. Instead, each struct large_vector | |
2776 | object LV is followed by a struct Lisp_Vector, which is at offset | |
2777 | large_vector_offset from LV, and whose address is therefore | |
2778 | large_vector_vec (&LV). */ | |
914adc42 DA |
2779 | |
2780 | struct large_vector | |
2781 | { | |
91f2d272 | 2782 | struct large_vector *next; |
914adc42 DA |
2783 | }; |
2784 | ||
91f2d272 PE |
2785 | enum |
2786 | { | |
2787 | large_vector_offset = ROUNDUP (sizeof (struct large_vector), vector_alignment) | |
2788 | }; | |
2789 | ||
2790 | static struct Lisp_Vector * | |
2791 | large_vector_vec (struct large_vector *p) | |
2792 | { | |
2793 | return (struct Lisp_Vector *) ((char *) p + large_vector_offset); | |
2794 | } | |
2795 | ||
914adc42 DA |
2796 | /* This internal type is used to maintain an underlying storage |
2797 | for small vectors. */ | |
2798 | ||
f3372c87 DA |
2799 | struct vector_block |
2800 | { | |
2801 | char data[VECTOR_BLOCK_BYTES]; | |
2802 | struct vector_block *next; | |
2803 | }; | |
2804 | ||
2805 | /* Chain of vector blocks. */ | |
2806 | ||
2807 | static struct vector_block *vector_blocks; | |
2808 | ||
2809 | /* Vector free lists, where NTH item points to a chain of free | |
2810 | vectors of the same NBYTES size, so NTH == VINDEX (NBYTES). */ | |
2811 | ||
2812 | static struct Lisp_Vector *vector_free_lists[VECTOR_MAX_FREE_LIST_INDEX]; | |
2813 | ||
2814 | /* Singly-linked list of large vectors. */ | |
2815 | ||
914adc42 | 2816 | static struct large_vector *large_vectors; |
f3372c87 DA |
2817 | |
2818 | /* The only vector with 0 slots, allocated from pure space. */ | |
2819 | ||
9730daca | 2820 | Lisp_Object zero_vector; |
f3372c87 | 2821 | |
3ab6e069 DA |
2822 | /* Number of live vectors. */ |
2823 | ||
2824 | static EMACS_INT total_vectors; | |
2825 | ||
5b835e1d | 2826 | /* Total size of live and free vectors, in Lisp_Object units. */ |
3ab6e069 | 2827 | |
5b835e1d | 2828 | static EMACS_INT total_vector_slots, total_free_vector_slots; |
3ab6e069 | 2829 | |
f3372c87 DA |
2830 | /* Get a new vector block. */ |
2831 | ||
2832 | static struct vector_block * | |
2833 | allocate_vector_block (void) | |
2834 | { | |
38182d90 | 2835 | struct vector_block *block = xmalloc (sizeof *block); |
f3372c87 DA |
2836 | |
2837 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK | |
2838 | mem_insert (block->data, block->data + VECTOR_BLOCK_BYTES, | |
2839 | MEM_TYPE_VECTOR_BLOCK); | |
2840 | #endif | |
2841 | ||
2842 | block->next = vector_blocks; | |
2843 | vector_blocks = block; | |
2844 | return block; | |
2845 | } | |
2846 | ||
2847 | /* Called once to initialize vector allocation. */ | |
2848 | ||
2849 | static void | |
2850 | init_vectors (void) | |
2851 | { | |
9730daca | 2852 | zero_vector = make_pure_vector (0); |
f3372c87 DA |
2853 | } |
2854 | ||
2855 | /* Allocate vector from a vector block. */ | |
2856 | ||
2857 | static struct Lisp_Vector * | |
2858 | allocate_vector_from_block (size_t nbytes) | |
2859 | { | |
914adc42 | 2860 | struct Lisp_Vector *vector; |
f3372c87 DA |
2861 | struct vector_block *block; |
2862 | size_t index, restbytes; | |
2863 | ||
2864 | eassert (VBLOCK_BYTES_MIN <= nbytes && nbytes <= VBLOCK_BYTES_MAX); | |
2865 | eassert (nbytes % roundup_size == 0); | |
2866 | ||
2867 | /* First, try to allocate from a free list | |
2868 | containing vectors of the requested size. */ | |
2869 | index = VINDEX (nbytes); | |
2870 | if (vector_free_lists[index]) | |
2871 | { | |
2872 | vector = vector_free_lists[index]; | |
91f2d272 | 2873 | vector_free_lists[index] = next_vector (vector); |
5b835e1d | 2874 | total_free_vector_slots -= nbytes / word_size; |
f3372c87 DA |
2875 | return vector; |
2876 | } | |
2877 | ||
2878 | /* Next, check free lists containing larger vectors. Since | |
2879 | we will split the result, we should have remaining space | |
2880 | large enough to use for one-slot vector at least. */ | |
2881 | for (index = VINDEX (nbytes + VBLOCK_BYTES_MIN); | |
2882 | index < VECTOR_MAX_FREE_LIST_INDEX; index++) | |
2883 | if (vector_free_lists[index]) | |
2884 | { | |
2885 | /* This vector is larger than requested. */ | |
2886 | vector = vector_free_lists[index]; | |
91f2d272 | 2887 | vector_free_lists[index] = next_vector (vector); |
5b835e1d | 2888 | total_free_vector_slots -= nbytes / word_size; |
f3372c87 DA |
2889 | |
2890 | /* Excess bytes are used for the smaller vector, | |
2891 | which should be set on an appropriate free list. */ | |
2892 | restbytes = index * roundup_size + VBLOCK_BYTES_MIN - nbytes; | |
2893 | eassert (restbytes % roundup_size == 0); | |
914adc42 | 2894 | SETUP_ON_FREE_LIST (ADVANCE (vector, nbytes), restbytes, index); |
f3372c87 DA |
2895 | return vector; |
2896 | } | |
2897 | ||
2898 | /* Finally, need a new vector block. */ | |
2899 | block = allocate_vector_block (); | |
2900 | ||
2901 | /* New vector will be at the beginning of this block. */ | |
2902 | vector = (struct Lisp_Vector *) block->data; | |
f3372c87 DA |
2903 | |
2904 | /* If the rest of space from this block is large enough | |
2905 | for one-slot vector at least, set up it on a free list. */ | |
2906 | restbytes = VECTOR_BLOCK_BYTES - nbytes; | |
2907 | if (restbytes >= VBLOCK_BYTES_MIN) | |
2908 | { | |
2909 | eassert (restbytes % roundup_size == 0); | |
914adc42 | 2910 | SETUP_ON_FREE_LIST (ADVANCE (vector, nbytes), restbytes, index); |
f3372c87 DA |
2911 | } |
2912 | return vector; | |
914adc42 | 2913 | } |
f3372c87 | 2914 | |
f3372c87 DA |
2915 | /* Nonzero if VECTOR pointer is valid pointer inside BLOCK. */ |
2916 | ||
2917 | #define VECTOR_IN_BLOCK(vector, block) \ | |
2918 | ((char *) (vector) <= (block)->data \ | |
2919 | + VECTOR_BLOCK_BYTES - VBLOCK_BYTES_MIN) | |
2920 | ||
914adc42 | 2921 | /* Return the memory footprint of V in bytes. */ |
ee28be33 | 2922 | |
914adc42 DA |
2923 | static ptrdiff_t |
2924 | vector_nbytes (struct Lisp_Vector *v) | |
2925 | { | |
2926 | ptrdiff_t size = v->header.size & ~ARRAY_MARK_FLAG; | |
2cf00efc | 2927 | ptrdiff_t nwords; |
914adc42 DA |
2928 | |
2929 | if (size & PSEUDOVECTOR_FLAG) | |
2930 | { | |
2931 | if (PSEUDOVECTOR_TYPEP (&v->header, PVEC_BOOL_VECTOR)) | |
3e0b94e7 DC |
2932 | { |
2933 | struct Lisp_Bool_Vector *bv = (struct Lisp_Bool_Vector *) v; | |
2cf00efc PE |
2934 | ptrdiff_t word_bytes = (bool_vector_words (bv->size) |
2935 | * sizeof (bits_word)); | |
2936 | ptrdiff_t boolvec_bytes = bool_header_size + word_bytes; | |
2937 | verify (header_size <= bool_header_size); | |
2938 | nwords = (boolvec_bytes - header_size + word_size - 1) / word_size; | |
3e0b94e7 | 2939 | } |
914adc42 | 2940 | else |
2cf00efc PE |
2941 | nwords = ((size & PSEUDOVECTOR_SIZE_MASK) |
2942 | + ((size & PSEUDOVECTOR_REST_MASK) | |
2943 | >> PSEUDOVECTOR_SIZE_BITS)); | |
914adc42 DA |
2944 | } |
2945 | else | |
2cf00efc PE |
2946 | nwords = size; |
2947 | return vroundup (header_size + word_size * nwords); | |
914adc42 | 2948 | } |
ee28be33 | 2949 | |
86bd985e DA |
2950 | /* Release extra resources still in use by VECTOR, which may be any |
2951 | vector-like object. For now, this is used just to free data in | |
2952 | font objects. */ | |
2953 | ||
2954 | static void | |
2955 | cleanup_vector (struct Lisp_Vector *vector) | |
2956 | { | |
01ae0fbf | 2957 | detect_suspicious_free (vector); |
5035fbc1 DA |
2958 | if (PSEUDOVECTOR_TYPEP (&vector->header, PVEC_FONT) |
2959 | && ((vector->header.size & PSEUDOVECTOR_SIZE_MASK) | |
2960 | == FONT_OBJECT_MAX)) | |
5ae356d9 DA |
2961 | { |
2962 | /* Attempt to catch subtle bugs like Bug#16140. */ | |
2963 | eassert (valid_font_driver (((struct font *) vector)->driver)); | |
2964 | ((struct font *) vector)->driver->close ((struct font *) vector); | |
2965 | } | |
86bd985e DA |
2966 | } |
2967 | ||
f3372c87 DA |
2968 | /* Reclaim space used by unmarked vectors. */ |
2969 | ||
b029599f | 2970 | NO_INLINE /* For better stack traces */ |
f3372c87 DA |
2971 | static void |
2972 | sweep_vectors (void) | |
2973 | { | |
1570ae92 | 2974 | struct vector_block *block, **bprev = &vector_blocks; |
914adc42 DA |
2975 | struct large_vector *lv, **lvprev = &large_vectors; |
2976 | struct Lisp_Vector *vector, *next; | |
f3372c87 | 2977 | |
5b835e1d | 2978 | total_vectors = total_vector_slots = total_free_vector_slots = 0; |
f3372c87 DA |
2979 | memset (vector_free_lists, 0, sizeof (vector_free_lists)); |
2980 | ||
2981 | /* Looking through vector blocks. */ | |
2982 | ||
2983 | for (block = vector_blocks; block; block = *bprev) | |
2984 | { | |
fce31d69 | 2985 | bool free_this_block = 0; |
914adc42 | 2986 | ptrdiff_t nbytes; |
f3372c87 DA |
2987 | |
2988 | for (vector = (struct Lisp_Vector *) block->data; | |
2989 | VECTOR_IN_BLOCK (vector, block); vector = next) | |
2990 | { | |
2991 | if (VECTOR_MARKED_P (vector)) | |
2992 | { | |
2993 | VECTOR_UNMARK (vector); | |
3ab6e069 | 2994 | total_vectors++; |
914adc42 DA |
2995 | nbytes = vector_nbytes (vector); |
2996 | total_vector_slots += nbytes / word_size; | |
2997 | next = ADVANCE (vector, nbytes); | |
f3372c87 DA |
2998 | } |
2999 | else | |
3000 | { | |
914adc42 | 3001 | ptrdiff_t total_bytes; |
f3372c87 | 3002 | |
86bd985e | 3003 | cleanup_vector (vector); |
914adc42 DA |
3004 | nbytes = vector_nbytes (vector); |
3005 | total_bytes = nbytes; | |
ee28be33 | 3006 | next = ADVANCE (vector, nbytes); |
f3372c87 DA |
3007 | |
3008 | /* While NEXT is not marked, try to coalesce with VECTOR, | |
3009 | thus making VECTOR of the largest possible size. */ | |
3010 | ||
3011 | while (VECTOR_IN_BLOCK (next, block)) | |
3012 | { | |
3013 | if (VECTOR_MARKED_P (next)) | |
3014 | break; | |
86bd985e | 3015 | cleanup_vector (next); |
914adc42 | 3016 | nbytes = vector_nbytes (next); |
ee28be33 | 3017 | total_bytes += nbytes; |
f3372c87 DA |
3018 | next = ADVANCE (next, nbytes); |
3019 | } | |
bfe3e0a2 | 3020 | |
ee28be33 | 3021 | eassert (total_bytes % roundup_size == 0); |
f3372c87 DA |
3022 | |
3023 | if (vector == (struct Lisp_Vector *) block->data | |
3024 | && !VECTOR_IN_BLOCK (next, block)) | |
b029599f | 3025 | /* This block should be freed because all of its |
f3372c87 DA |
3026 | space was coalesced into the only free vector. */ |
3027 | free_this_block = 1; | |
3028 | else | |
ee28be33 | 3029 | { |
ba355de0 | 3030 | size_t tmp; |
ee28be33 SM |
3031 | SETUP_ON_FREE_LIST (vector, total_bytes, tmp); |
3032 | } | |
f3372c87 DA |
3033 | } |
3034 | } | |
3035 | ||
3036 | if (free_this_block) | |
3037 | { | |
3038 | *bprev = block->next; | |
3039 | #if GC_MARK_STACK && !defined GC_MALLOC_CHECK | |
3040 | mem_delete (mem_find (block->data)); | |
3041 | #endif | |
3042 | xfree (block); | |
3043 | } | |
3044 | else | |
3045 | bprev = &block->next; | |
3046 | } | |
3047 | ||
3048 | /* Sweep large vectors. */ | |
3049 | ||
914adc42 | 3050 | for (lv = large_vectors; lv; lv = *lvprev) |
f3372c87 | 3051 | { |
91f2d272 | 3052 | vector = large_vector_vec (lv); |
f3372c87 DA |
3053 | if (VECTOR_MARKED_P (vector)) |
3054 | { | |
3055 | VECTOR_UNMARK (vector); | |
3ab6e069 | 3056 | total_vectors++; |
169925ec DA |
3057 | if (vector->header.size & PSEUDOVECTOR_FLAG) |
3058 | { | |
d06714cb PE |
3059 | /* All non-bool pseudovectors are small enough to be allocated |
3060 | from vector blocks. This code should be redesigned if some | |
3061 | pseudovector type grows beyond VBLOCK_BYTES_MAX. */ | |
3062 | eassert (PSEUDOVECTOR_TYPEP (&vector->header, PVEC_BOOL_VECTOR)); | |
3e0b94e7 | 3063 | total_vector_slots += vector_nbytes (vector) / word_size; |
169925ec DA |
3064 | } |
3065 | else | |
5b835e1d DA |
3066 | total_vector_slots |
3067 | += header_size / word_size + vector->header.size; | |
91f2d272 | 3068 | lvprev = &lv->next; |
f3372c87 DA |
3069 | } |
3070 | else | |
3071 | { | |
91f2d272 | 3072 | *lvprev = lv->next; |
914adc42 | 3073 | lisp_free (lv); |
f3372c87 DA |
3074 | } |
3075 | } | |
3076 | } | |
3077 | ||
34400008 GM |
3078 | /* Value is a pointer to a newly allocated Lisp_Vector structure |
3079 | with room for LEN Lisp_Objects. */ | |
3080 | ||
ece93c02 | 3081 | static struct Lisp_Vector * |
d311d28c | 3082 | allocate_vectorlike (ptrdiff_t len) |
1825c68d KH |
3083 | { |
3084 | struct Lisp_Vector *p; | |
3085 | ||
dafc79fa SM |
3086 | MALLOC_BLOCK_INPUT; |
3087 | ||
f3372c87 | 3088 | if (len == 0) |
9730daca | 3089 | p = XVECTOR (zero_vector); |
d12e8f5a | 3090 | else |
8bbbc977 | 3091 | { |
d12e8f5a | 3092 | size_t nbytes = header_size + len * word_size; |
f3372c87 | 3093 | |
d12e8f5a | 3094 | #ifdef DOUG_LEA_MALLOC |
f20b8315 DC |
3095 | if (!mmap_lisp_allowed_p ()) |
3096 | mallopt (M_MMAP_MAX, 0); | |
d12e8f5a | 3097 | #endif |
f3372c87 | 3098 | |
d12e8f5a DA |
3099 | if (nbytes <= VBLOCK_BYTES_MAX) |
3100 | p = allocate_vector_from_block (vroundup (nbytes)); | |
3101 | else | |
3102 | { | |
914adc42 | 3103 | struct large_vector *lv |
91f2d272 | 3104 | = lisp_malloc ((large_vector_offset + header_size |
fbe9e0b9 | 3105 | + len * word_size), |
914adc42 | 3106 | MEM_TYPE_VECTORLIKE); |
91f2d272 | 3107 | lv->next = large_vectors; |
914adc42 | 3108 | large_vectors = lv; |
91f2d272 | 3109 | p = large_vector_vec (lv); |
d12e8f5a | 3110 | } |
177c0ea7 | 3111 | |
d1658221 | 3112 | #ifdef DOUG_LEA_MALLOC |
f20b8315 DC |
3113 | if (!mmap_lisp_allowed_p ()) |
3114 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); | |
d1658221 | 3115 | #endif |
177c0ea7 | 3116 | |
faa52174 | 3117 | if (find_suspicious_object_in_range (p, (char *) p + nbytes)) |
01ae0fbf DC |
3118 | emacs_abort (); |
3119 | ||
d12e8f5a DA |
3120 | consing_since_gc += nbytes; |
3121 | vector_cells_consed += len; | |
3122 | } | |
1825c68d | 3123 | |
dafc79fa | 3124 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 3125 | |
1825c68d KH |
3126 | return p; |
3127 | } | |
3128 | ||
34400008 | 3129 | |
dd0b0efb | 3130 | /* Allocate a vector with LEN slots. */ |
ece93c02 GM |
3131 | |
3132 | struct Lisp_Vector * | |
dd0b0efb | 3133 | allocate_vector (EMACS_INT len) |
ece93c02 | 3134 | { |
dd0b0efb PE |
3135 | struct Lisp_Vector *v; |
3136 | ptrdiff_t nbytes_max = min (PTRDIFF_MAX, SIZE_MAX); | |
3137 | ||
3138 | if (min ((nbytes_max - header_size) / word_size, MOST_POSITIVE_FIXNUM) < len) | |
3139 | memory_full (SIZE_MAX); | |
3140 | v = allocate_vectorlike (len); | |
3141 | v->header.size = len; | |
ece93c02 GM |
3142 | return v; |
3143 | } | |
3144 | ||
3145 | ||
3146 | /* Allocate other vector-like structures. */ | |
3147 | ||
30f95089 | 3148 | struct Lisp_Vector * |
914adc42 | 3149 | allocate_pseudovector (int memlen, int lisplen, enum pvec_type tag) |
ece93c02 | 3150 | { |
d2029e5b | 3151 | struct Lisp_Vector *v = allocate_vectorlike (memlen); |
e46bb31a | 3152 | int i; |
177c0ea7 | 3153 | |
914adc42 DA |
3154 | /* Catch bogus values. */ |
3155 | eassert (tag <= PVEC_FONT); | |
3156 | eassert (memlen - lisplen <= (1 << PSEUDOVECTOR_REST_BITS) - 1); | |
3157 | eassert (lisplen <= (1 << PSEUDOVECTOR_SIZE_BITS) - 1); | |
3158 | ||
d2029e5b | 3159 | /* Only the first lisplen slots will be traced normally by the GC. */ |
d2029e5b | 3160 | for (i = 0; i < lisplen; ++i) |
91f2d272 | 3161 | v->contents[i] = Qnil; |
177c0ea7 | 3162 | |
914adc42 | 3163 | XSETPVECTYPESIZE (v, tag, lisplen, memlen - lisplen); |
d2029e5b SM |
3164 | return v; |
3165 | } | |
d2029e5b | 3166 | |
36429c89 DA |
3167 | struct buffer * |
3168 | allocate_buffer (void) | |
3169 | { | |
38182d90 | 3170 | struct buffer *b = lisp_malloc (sizeof *b, MEM_TYPE_BUFFER); |
36429c89 | 3171 | |
914adc42 | 3172 | BUFFER_PVEC_INIT (b); |
c752cfa9 | 3173 | /* Put B on the chain of all buffers including killed ones. */ |
914adc42 | 3174 | b->next = all_buffers; |
c752cfa9 DA |
3175 | all_buffers = b; |
3176 | /* Note that the rest fields of B are not initialized. */ | |
36429c89 DA |
3177 | return b; |
3178 | } | |
3179 | ||
ece93c02 | 3180 | struct Lisp_Hash_Table * |
878f97ff | 3181 | allocate_hash_table (void) |
ece93c02 | 3182 | { |
878f97ff | 3183 | return ALLOCATE_PSEUDOVECTOR (struct Lisp_Hash_Table, count, PVEC_HASH_TABLE); |
ece93c02 GM |
3184 | } |
3185 | ||
ece93c02 | 3186 | struct window * |
971de7fb | 3187 | allocate_window (void) |
ece93c02 | 3188 | { |
62efea5e | 3189 | struct window *w; |
177c0ea7 | 3190 | |
62efea5e DA |
3191 | w = ALLOCATE_PSEUDOVECTOR (struct window, current_matrix, PVEC_WINDOW); |
3192 | /* Users assumes that non-Lisp data is zeroed. */ | |
3193 | memset (&w->current_matrix, 0, | |
3194 | sizeof (*w) - offsetof (struct window, current_matrix)); | |
3195 | return w; | |
3196 | } | |
177c0ea7 | 3197 | |
4a729fd8 | 3198 | struct terminal * |
971de7fb | 3199 | allocate_terminal (void) |
4a729fd8 | 3200 | { |
62efea5e | 3201 | struct terminal *t; |
ece93c02 | 3202 | |
62efea5e DA |
3203 | t = ALLOCATE_PSEUDOVECTOR (struct terminal, next_terminal, PVEC_TERMINAL); |
3204 | /* Users assumes that non-Lisp data is zeroed. */ | |
3205 | memset (&t->next_terminal, 0, | |
3206 | sizeof (*t) - offsetof (struct terminal, next_terminal)); | |
d2029e5b | 3207 | return t; |
4a729fd8 | 3208 | } |
ece93c02 GM |
3209 | |
3210 | struct frame * | |
971de7fb | 3211 | allocate_frame (void) |
ece93c02 | 3212 | { |
62efea5e DA |
3213 | struct frame *f; |
3214 | ||
3215 | f = ALLOCATE_PSEUDOVECTOR (struct frame, face_cache, PVEC_FRAME); | |
3216 | /* Users assumes that non-Lisp data is zeroed. */ | |
72af86bd | 3217 | memset (&f->face_cache, 0, |
62efea5e | 3218 | sizeof (*f) - offsetof (struct frame, face_cache)); |
d2029e5b | 3219 | return f; |
ece93c02 GM |
3220 | } |
3221 | ||
ece93c02 | 3222 | struct Lisp_Process * |
971de7fb | 3223 | allocate_process (void) |
ece93c02 | 3224 | { |
62efea5e | 3225 | struct Lisp_Process *p; |
ece93c02 | 3226 | |
62efea5e DA |
3227 | p = ALLOCATE_PSEUDOVECTOR (struct Lisp_Process, pid, PVEC_PROCESS); |
3228 | /* Users assumes that non-Lisp data is zeroed. */ | |
3229 | memset (&p->pid, 0, | |
3230 | sizeof (*p) - offsetof (struct Lisp_Process, pid)); | |
3231 | return p; | |
3232 | } | |
ece93c02 | 3233 | |
a7ca3326 | 3234 | DEFUN ("make-vector", Fmake_vector, Smake_vector, 2, 2, 0, |
a6266d23 | 3235 | doc: /* Return a newly created vector of length LENGTH, with each element being INIT. |
7ee72033 | 3236 | See also the function `vector'. */) |
5842a27b | 3237 | (register Lisp_Object length, Lisp_Object init) |
7146af97 | 3238 | { |
1825c68d | 3239 | Lisp_Object vector; |
d311d28c PE |
3240 | register ptrdiff_t sizei; |
3241 | register ptrdiff_t i; | |
7146af97 JB |
3242 | register struct Lisp_Vector *p; |
3243 | ||
b7826503 | 3244 | CHECK_NATNUM (length); |
7146af97 | 3245 | |
d311d28c PE |
3246 | p = allocate_vector (XFASTINT (length)); |
3247 | sizei = XFASTINT (length); | |
ae35e756 | 3248 | for (i = 0; i < sizei; i++) |
91f2d272 | 3249 | p->contents[i] = init; |
7146af97 | 3250 | |
1825c68d | 3251 | XSETVECTOR (vector, p); |
7146af97 JB |
3252 | return vector; |
3253 | } | |
3254 | ||
34400008 | 3255 | |
a7ca3326 | 3256 | DEFUN ("vector", Fvector, Svector, 0, MANY, 0, |
eae936e2 | 3257 | doc: /* Return a newly created vector with specified arguments as elements. |
ae8e8122 MB |
3258 | Any number of arguments, even zero arguments, are allowed. |
3259 | usage: (vector &rest OBJECTS) */) | |
f66c7cf8 | 3260 | (ptrdiff_t nargs, Lisp_Object *args) |
7146af97 | 3261 | { |
f66c7cf8 | 3262 | ptrdiff_t i; |
25721f5b DA |
3263 | register Lisp_Object val = make_uninit_vector (nargs); |
3264 | register struct Lisp_Vector *p = XVECTOR (val); | |
7146af97 | 3265 | |
ae35e756 | 3266 | for (i = 0; i < nargs; i++) |
91f2d272 | 3267 | p->contents[i] = args[i]; |
7146af97 JB |
3268 | return val; |
3269 | } | |
3270 | ||
3017f87f SM |
3271 | void |
3272 | make_byte_code (struct Lisp_Vector *v) | |
3273 | { | |
ed0ca4a5 PE |
3274 | /* Don't allow the global zero_vector to become a byte code object. */ |
3275 | eassert (0 < v->header.size); | |
3276 | ||
91f2d272 PE |
3277 | if (v->header.size > 1 && STRINGP (v->contents[1]) |
3278 | && STRING_MULTIBYTE (v->contents[1])) | |
3017f87f SM |
3279 | /* BYTECODE-STRING must have been produced by Emacs 20.2 or the |
3280 | earlier because they produced a raw 8-bit string for byte-code | |
3281 | and now such a byte-code string is loaded as multibyte while | |
3282 | raw 8-bit characters converted to multibyte form. Thus, now we | |
3283 | must convert them back to the original unibyte form. */ | |
91f2d272 | 3284 | v->contents[1] = Fstring_as_unibyte (v->contents[1]); |
3017f87f SM |
3285 | XSETPVECTYPE (v, PVEC_COMPILED); |
3286 | } | |
34400008 | 3287 | |
a7ca3326 | 3288 | DEFUN ("make-byte-code", Fmake_byte_code, Smake_byte_code, 4, MANY, 0, |
a6266d23 | 3289 | doc: /* Create a byte-code object with specified arguments as elements. |
e2abe5a1 SM |
3290 | The arguments should be the ARGLIST, bytecode-string BYTE-CODE, constant |
3291 | vector CONSTANTS, maximum stack size DEPTH, (optional) DOCSTRING, | |
3292 | and (optional) INTERACTIVE-SPEC. | |
228299fa | 3293 | The first four arguments are required; at most six have any |
ae8e8122 | 3294 | significance. |
e2abe5a1 SM |
3295 | The ARGLIST can be either like the one of `lambda', in which case the arguments |
3296 | will be dynamically bound before executing the byte code, or it can be an | |
3297 | integer of the form NNNNNNNRMMMMMMM where the 7bit MMMMMMM specifies the | |
3298 | minimum number of arguments, the 7-bit NNNNNNN specifies the maximum number | |
3299 | of arguments (ignoring &rest) and the R bit specifies whether there is a &rest | |
3300 | argument to catch the left-over arguments. If such an integer is used, the | |
3301 | arguments will not be dynamically bound but will be instead pushed on the | |
3302 | stack before executing the byte-code. | |
92cc28b2 | 3303 | usage: (make-byte-code ARGLIST BYTE-CODE CONSTANTS DEPTH &optional DOCSTRING INTERACTIVE-SPEC &rest ELEMENTS) */) |
f66c7cf8 | 3304 | (ptrdiff_t nargs, Lisp_Object *args) |
7146af97 | 3305 | { |
f66c7cf8 | 3306 | ptrdiff_t i; |
25721f5b DA |
3307 | register Lisp_Object val = make_uninit_vector (nargs); |
3308 | register struct Lisp_Vector *p = XVECTOR (val); | |
7146af97 | 3309 | |
12fbe755 | 3310 | /* We used to purecopy everything here, if purify-flag was set. This worked |
3017f87f SM |
3311 | OK for Emacs-23, but with Emacs-24's lexical binding code, it can be |
3312 | dangerous, since make-byte-code is used during execution to build | |
3313 | closures, so any closure built during the preload phase would end up | |
3314 | copied into pure space, including its free variables, which is sometimes | |
3315 | just wasteful and other times plainly wrong (e.g. those free vars may want | |
3316 | to be setcar'd). */ | |
9eac9d59 | 3317 | |
ae35e756 | 3318 | for (i = 0; i < nargs; i++) |
91f2d272 | 3319 | p->contents[i] = args[i]; |
3017f87f | 3320 | make_byte_code (p); |
876c194c | 3321 | XSETCOMPILED (val, p); |
7146af97 JB |
3322 | return val; |
3323 | } | |
2e471eb5 | 3324 | |
34400008 | 3325 | |
7146af97 | 3326 | \f |
2e471eb5 GM |
3327 | /*********************************************************************** |
3328 | Symbol Allocation | |
3329 | ***********************************************************************/ | |
7146af97 | 3330 | |
d55c12ed AS |
3331 | /* Like struct Lisp_Symbol, but padded so that the size is a multiple |
3332 | of the required alignment if LSB tags are used. */ | |
3333 | ||
3334 | union aligned_Lisp_Symbol | |
3335 | { | |
3336 | struct Lisp_Symbol s; | |
bfe3e0a2 | 3337 | #if USE_LSB_TAG |
2b90362b DA |
3338 | unsigned char c[(sizeof (struct Lisp_Symbol) + GCALIGNMENT - 1) |
3339 | & -GCALIGNMENT]; | |
d55c12ed AS |
3340 | #endif |
3341 | }; | |
3342 | ||
2e471eb5 GM |
3343 | /* Each symbol_block is just under 1020 bytes long, since malloc |
3344 | really allocates in units of powers of two and uses 4 bytes for its | |
3017f87f | 3345 | own overhead. */ |
7146af97 JB |
3346 | |
3347 | #define SYMBOL_BLOCK_SIZE \ | |
d55c12ed | 3348 | ((1020 - sizeof (struct symbol_block *)) / sizeof (union aligned_Lisp_Symbol)) |
7146af97 JB |
3349 | |
3350 | struct symbol_block | |
2e471eb5 | 3351 | { |
6b61353c | 3352 | /* Place `symbols' first, to preserve alignment. */ |
d55c12ed | 3353 | union aligned_Lisp_Symbol symbols[SYMBOL_BLOCK_SIZE]; |
6b61353c | 3354 | struct symbol_block *next; |
2e471eb5 | 3355 | }; |
7146af97 | 3356 | |
34400008 GM |
3357 | /* Current symbol block and index of first unused Lisp_Symbol |
3358 | structure in it. */ | |
3359 | ||
d3d47262 | 3360 | static struct symbol_block *symbol_block; |
fff62aa9 | 3361 | static int symbol_block_index = SYMBOL_BLOCK_SIZE; |
e3b83880 SM |
3362 | /* Pointer to the first symbol_block that contains pinned symbols. |
3363 | Tests for 24.4 showed that at dump-time, Emacs contains about 15K symbols, | |
3364 | 10K of which are pinned (and all but 250 of them are interned in obarray), | |
3365 | whereas a "typical session" has in the order of 30K symbols. | |
3366 | `symbol_block_pinned' lets mark_pinned_symbols scan only 15K symbols rather | |
3367 | than 30K to find the 10K symbols we need to mark. */ | |
3368 | static struct symbol_block *symbol_block_pinned; | |
7146af97 | 3369 | |
34400008 GM |
3370 | /* List of free symbols. */ |
3371 | ||
d3d47262 | 3372 | static struct Lisp_Symbol *symbol_free_list; |
7146af97 | 3373 | |
84575e67 PE |
3374 | static void |
3375 | set_symbol_name (Lisp_Object sym, Lisp_Object name) | |
3376 | { | |
3377 | XSYMBOL (sym)->name = name; | |
3378 | } | |
3379 | ||
a7ca3326 | 3380 | DEFUN ("make-symbol", Fmake_symbol, Smake_symbol, 1, 1, 0, |
a6266d23 | 3381 | doc: /* Return a newly allocated uninterned symbol whose name is NAME. |
eadf1faa | 3382 | Its value is void, and its function definition and property list are nil. */) |
5842a27b | 3383 | (Lisp_Object name) |
7146af97 JB |
3384 | { |
3385 | register Lisp_Object val; | |
3386 | register struct Lisp_Symbol *p; | |
3387 | ||
b7826503 | 3388 | CHECK_STRING (name); |
7146af97 | 3389 | |
dafc79fa | 3390 | MALLOC_BLOCK_INPUT; |
e2984df0 | 3391 | |
7146af97 JB |
3392 | if (symbol_free_list) |
3393 | { | |
45d12a89 | 3394 | XSETSYMBOL (val, symbol_free_list); |
28a099a4 | 3395 | symbol_free_list = symbol_free_list->next; |
7146af97 JB |
3396 | } |
3397 | else | |
3398 | { | |
3399 | if (symbol_block_index == SYMBOL_BLOCK_SIZE) | |
3400 | { | |
38182d90 PE |
3401 | struct symbol_block *new |
3402 | = lisp_malloc (sizeof *new, MEM_TYPE_SYMBOL); | |
7146af97 JB |
3403 | new->next = symbol_block; |
3404 | symbol_block = new; | |
3405 | symbol_block_index = 0; | |
3900d5de | 3406 | total_free_symbols += SYMBOL_BLOCK_SIZE; |
7146af97 | 3407 | } |
d55c12ed | 3408 | XSETSYMBOL (val, &symbol_block->symbols[symbol_block_index].s); |
6b61353c | 3409 | symbol_block_index++; |
7146af97 | 3410 | } |
177c0ea7 | 3411 | |
dafc79fa | 3412 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 3413 | |
7146af97 | 3414 | p = XSYMBOL (val); |
c644523b DA |
3415 | set_symbol_name (val, name); |
3416 | set_symbol_plist (val, Qnil); | |
ce5b453a SM |
3417 | p->redirect = SYMBOL_PLAINVAL; |
3418 | SET_SYMBOL_VAL (p, Qunbound); | |
eadf1faa | 3419 | set_symbol_function (val, Qnil); |
c644523b | 3420 | set_symbol_next (val, NULL); |
e3b83880 | 3421 | p->gcmarkbit = false; |
9e713715 GM |
3422 | p->interned = SYMBOL_UNINTERNED; |
3423 | p->constant = 0; | |
e3b83880 SM |
3424 | p->declared_special = false; |
3425 | p->pinned = false; | |
2e471eb5 GM |
3426 | consing_since_gc += sizeof (struct Lisp_Symbol); |
3427 | symbols_consed++; | |
3900d5de | 3428 | total_free_symbols--; |
7146af97 JB |
3429 | return val; |
3430 | } | |
3431 | ||
3f25e183 | 3432 | |
2e471eb5 GM |
3433 | \f |
3434 | /*********************************************************************** | |
34400008 | 3435 | Marker (Misc) Allocation |
2e471eb5 | 3436 | ***********************************************************************/ |
3f25e183 | 3437 | |
d55c12ed AS |
3438 | /* Like union Lisp_Misc, but padded so that its size is a multiple of |
3439 | the required alignment when LSB tags are used. */ | |
3440 | ||
3441 | union aligned_Lisp_Misc | |
3442 | { | |
3443 | union Lisp_Misc m; | |
bfe3e0a2 | 3444 | #if USE_LSB_TAG |
2b90362b DA |
3445 | unsigned char c[(sizeof (union Lisp_Misc) + GCALIGNMENT - 1) |
3446 | & -GCALIGNMENT]; | |
d55c12ed AS |
3447 | #endif |
3448 | }; | |
3449 | ||
2e471eb5 GM |
3450 | /* Allocation of markers and other objects that share that structure. |
3451 | Works like allocation of conses. */ | |
c0696668 | 3452 | |
2e471eb5 | 3453 | #define MARKER_BLOCK_SIZE \ |
d55c12ed | 3454 | ((1020 - sizeof (struct marker_block *)) / sizeof (union aligned_Lisp_Misc)) |
2e471eb5 GM |
3455 | |
3456 | struct marker_block | |
c0696668 | 3457 | { |
6b61353c | 3458 | /* Place `markers' first, to preserve alignment. */ |
d55c12ed | 3459 | union aligned_Lisp_Misc markers[MARKER_BLOCK_SIZE]; |
6b61353c | 3460 | struct marker_block *next; |
2e471eb5 | 3461 | }; |
c0696668 | 3462 | |
d3d47262 | 3463 | static struct marker_block *marker_block; |
fff62aa9 | 3464 | static int marker_block_index = MARKER_BLOCK_SIZE; |
c0696668 | 3465 | |
d3d47262 | 3466 | static union Lisp_Misc *marker_free_list; |
c0696668 | 3467 | |
d7a7fda3 | 3468 | /* Return a newly allocated Lisp_Misc object of specified TYPE. */ |
2e471eb5 | 3469 | |
1b971ac1 | 3470 | static Lisp_Object |
d7a7fda3 | 3471 | allocate_misc (enum Lisp_Misc_Type type) |
7146af97 | 3472 | { |
2e471eb5 | 3473 | Lisp_Object val; |
7146af97 | 3474 | |
dafc79fa | 3475 | MALLOC_BLOCK_INPUT; |
cfb2f32e | 3476 | |
2e471eb5 | 3477 | if (marker_free_list) |
7146af97 | 3478 | { |
2e471eb5 GM |
3479 | XSETMISC (val, marker_free_list); |
3480 | marker_free_list = marker_free_list->u_free.chain; | |
7146af97 JB |
3481 | } |
3482 | else | |
7146af97 | 3483 | { |
2e471eb5 GM |
3484 | if (marker_block_index == MARKER_BLOCK_SIZE) |
3485 | { | |
38182d90 | 3486 | struct marker_block *new = lisp_malloc (sizeof *new, MEM_TYPE_MISC); |
2e471eb5 GM |
3487 | new->next = marker_block; |
3488 | marker_block = new; | |
3489 | marker_block_index = 0; | |
7b7990cc | 3490 | total_free_markers += MARKER_BLOCK_SIZE; |
2e471eb5 | 3491 | } |
d55c12ed | 3492 | XSETMISC (val, &marker_block->markers[marker_block_index].m); |
6b61353c | 3493 | marker_block_index++; |
7146af97 | 3494 | } |
177c0ea7 | 3495 | |
dafc79fa | 3496 | MALLOC_UNBLOCK_INPUT; |
e2984df0 | 3497 | |
7b7990cc | 3498 | --total_free_markers; |
2e471eb5 GM |
3499 | consing_since_gc += sizeof (union Lisp_Misc); |
3500 | misc_objects_consed++; | |
84575e67 | 3501 | XMISCANY (val)->type = type; |
67ee9f6e | 3502 | XMISCANY (val)->gcmarkbit = 0; |
2e471eb5 GM |
3503 | return val; |
3504 | } | |
3505 | ||
73ebd38f | 3506 | /* Free a Lisp_Misc object. */ |
7b7990cc | 3507 | |
73ebd38f | 3508 | void |
971de7fb | 3509 | free_misc (Lisp_Object misc) |
7b7990cc | 3510 | { |
84575e67 | 3511 | XMISCANY (misc)->type = Lisp_Misc_Free; |
7b7990cc KS |
3512 | XMISC (misc)->u_free.chain = marker_free_list; |
3513 | marker_free_list = XMISC (misc); | |
0dd6d66d | 3514 | consing_since_gc -= sizeof (union Lisp_Misc); |
7b7990cc KS |
3515 | total_free_markers++; |
3516 | } | |
3517 | ||
7b1123d8 PE |
3518 | /* Verify properties of Lisp_Save_Value's representation |
3519 | that are assumed here and elsewhere. */ | |
3520 | ||
3521 | verify (SAVE_UNUSED == 0); | |
52a9bcae PE |
3522 | verify (((SAVE_INTEGER | SAVE_POINTER | SAVE_FUNCPOINTER | SAVE_OBJECT) |
3523 | >> SAVE_SLOT_BITS) | |
3524 | == 0); | |
7b1123d8 | 3525 | |
1396ac86 PE |
3526 | /* Return Lisp_Save_Value objects for the various combinations |
3527 | that callers need. */ | |
1b971ac1 DA |
3528 | |
3529 | Lisp_Object | |
1396ac86 | 3530 | make_save_int_int_int (ptrdiff_t a, ptrdiff_t b, ptrdiff_t c) |
1b971ac1 | 3531 | { |
1b971ac1 DA |
3532 | Lisp_Object val = allocate_misc (Lisp_Misc_Save_Value); |
3533 | struct Lisp_Save_Value *p = XSAVE_VALUE (val); | |
1396ac86 PE |
3534 | p->save_type = SAVE_TYPE_INT_INT_INT; |
3535 | p->data[0].integer = a; | |
3536 | p->data[1].integer = b; | |
3537 | p->data[2].integer = c; | |
3538 | return val; | |
3539 | } | |
1b971ac1 | 3540 | |
1396ac86 PE |
3541 | Lisp_Object |
3542 | make_save_obj_obj_obj_obj (Lisp_Object a, Lisp_Object b, Lisp_Object c, | |
3543 | Lisp_Object d) | |
3544 | { | |
3545 | Lisp_Object val = allocate_misc (Lisp_Misc_Save_Value); | |
3546 | struct Lisp_Save_Value *p = XSAVE_VALUE (val); | |
3547 | p->save_type = SAVE_TYPE_OBJ_OBJ_OBJ_OBJ; | |
3548 | p->data[0].object = a; | |
3549 | p->data[1].object = b; | |
3550 | p->data[2].object = c; | |
3551 | p->data[3].object = d; | |
3552 | return val; | |
3553 | } | |
1b971ac1 | 3554 | |
1396ac86 PE |
3555 | Lisp_Object |
3556 | make_save_ptr (void *a) | |
3557 | { | |
3558 | Lisp_Object val = allocate_misc (Lisp_Misc_Save_Value); | |
3559 | struct Lisp_Save_Value *p = XSAVE_VALUE (val); | |
3560 | p->save_type = SAVE_POINTER; | |
3561 | p->data[0].pointer = a; | |
3562 | return val; | |
3563 | } | |
7b1123d8 | 3564 | |
1396ac86 PE |
3565 | Lisp_Object |
3566 | make_save_ptr_int (void *a, ptrdiff_t b) | |
3567 | { | |
3568 | Lisp_Object val = allocate_misc (Lisp_Misc_Save_Value); | |
3569 | struct Lisp_Save_Value *p = XSAVE_VALUE (val); | |
3570 | p->save_type = SAVE_TYPE_PTR_INT; | |
3571 | p->data[0].pointer = a; | |
3572 | p->data[1].integer = b; | |
3573 | return val; | |
3574 | } | |
1b971ac1 | 3575 | |
7cdf484b | 3576 | #if ! (defined USE_X_TOOLKIT || defined USE_GTK) |
f4e891b5 PE |
3577 | Lisp_Object |
3578 | make_save_ptr_ptr (void *a, void *b) | |
3579 | { | |
3580 | Lisp_Object val = allocate_misc (Lisp_Misc_Save_Value); | |
3581 | struct Lisp_Save_Value *p = XSAVE_VALUE (val); | |
3582 | p->save_type = SAVE_TYPE_PTR_PTR; | |
3583 | p->data[0].pointer = a; | |
3584 | p->data[1].pointer = b; | |
3585 | return val; | |
3586 | } | |
3587 | #endif | |
3588 | ||
1396ac86 PE |
3589 | Lisp_Object |
3590 | make_save_funcptr_ptr_obj (void (*a) (void), void *b, Lisp_Object c) | |
3591 | { | |
3592 | Lisp_Object val = allocate_misc (Lisp_Misc_Save_Value); | |
3593 | struct Lisp_Save_Value *p = XSAVE_VALUE (val); | |
3594 | p->save_type = SAVE_TYPE_FUNCPTR_PTR_OBJ; | |
3595 | p->data[0].funcpointer = a; | |
3596 | p->data[1].pointer = b; | |
3597 | p->data[2].object = c; | |
1b971ac1 DA |
3598 | return val; |
3599 | } | |
3600 | ||
1396ac86 PE |
3601 | /* Return a Lisp_Save_Value object that represents an array A |
3602 | of N Lisp objects. */ | |
42172a6b RS |
3603 | |
3604 | Lisp_Object | |
1396ac86 | 3605 | make_save_memory (Lisp_Object *a, ptrdiff_t n) |
42172a6b | 3606 | { |
468afbac DA |
3607 | Lisp_Object val = allocate_misc (Lisp_Misc_Save_Value); |
3608 | struct Lisp_Save_Value *p = XSAVE_VALUE (val); | |
1396ac86 PE |
3609 | p->save_type = SAVE_TYPE_MEMORY; |
3610 | p->data[0].pointer = a; | |
3611 | p->data[1].integer = n; | |
468afbac | 3612 | return val; |
42172a6b RS |
3613 | } |
3614 | ||
73ebd38f DA |
3615 | /* Free a Lisp_Save_Value object. Do not use this function |
3616 | if SAVE contains pointer other than returned by xmalloc. */ | |
62c2e5ed | 3617 | |
27e498e6 | 3618 | void |
62c2e5ed DA |
3619 | free_save_value (Lisp_Object save) |
3620 | { | |
2b30549c | 3621 | xfree (XSAVE_POINTER (save, 0)); |
62c2e5ed DA |
3622 | free_misc (save); |
3623 | } | |
3624 | ||
d7a7fda3 DA |
3625 | /* Return a Lisp_Misc_Overlay object with specified START, END and PLIST. */ |
3626 | ||
3627 | Lisp_Object | |
3628 | build_overlay (Lisp_Object start, Lisp_Object end, Lisp_Object plist) | |
3629 | { | |
3630 | register Lisp_Object overlay; | |
3631 | ||
3632 | overlay = allocate_misc (Lisp_Misc_Overlay); | |
3633 | OVERLAY_START (overlay) = start; | |
3634 | OVERLAY_END (overlay) = end; | |
c644523b | 3635 | set_overlay_plist (overlay, plist); |
d7a7fda3 DA |
3636 | XOVERLAY (overlay)->next = NULL; |
3637 | return overlay; | |
3638 | } | |
3639 | ||
a7ca3326 | 3640 | DEFUN ("make-marker", Fmake_marker, Smake_marker, 0, 0, 0, |
a6266d23 | 3641 | doc: /* Return a newly allocated marker which does not point at any place. */) |
5842a27b | 3642 | (void) |
2e471eb5 | 3643 | { |
eeaea515 DA |
3644 | register Lisp_Object val; |
3645 | register struct Lisp_Marker *p; | |
7146af97 | 3646 | |
eeaea515 DA |
3647 | val = allocate_misc (Lisp_Misc_Marker); |
3648 | p = XMARKER (val); | |
3649 | p->buffer = 0; | |
3650 | p->bytepos = 0; | |
3651 | p->charpos = 0; | |
3652 | p->next = NULL; | |
3653 | p->insertion_type = 0; | |
101ed2bb | 3654 | p->need_adjustment = 0; |
eeaea515 | 3655 | return val; |
7146af97 | 3656 | } |
2e471eb5 | 3657 | |
657924ff DA |
3658 | /* Return a newly allocated marker which points into BUF |
3659 | at character position CHARPOS and byte position BYTEPOS. */ | |
3660 | ||
3661 | Lisp_Object | |
3662 | build_marker (struct buffer *buf, ptrdiff_t charpos, ptrdiff_t bytepos) | |
3663 | { | |
eeaea515 DA |
3664 | Lisp_Object obj; |
3665 | struct Lisp_Marker *m; | |
657924ff DA |
3666 | |
3667 | /* No dead buffers here. */ | |
e578f381 | 3668 | eassert (BUFFER_LIVE_P (buf)); |
657924ff | 3669 | |
eeaea515 DA |
3670 | /* Every character is at least one byte. */ |
3671 | eassert (charpos <= bytepos); | |
3672 | ||
3673 | obj = allocate_misc (Lisp_Misc_Marker); | |
3674 | m = XMARKER (obj); | |
3675 | m->buffer = buf; | |
3676 | m->charpos = charpos; | |
3677 | m->bytepos = bytepos; | |
3678 | m->insertion_type = 0; | |
101ed2bb | 3679 | m->need_adjustment = 0; |
eeaea515 DA |
3680 | m->next = BUF_MARKERS (buf); |
3681 | BUF_MARKERS (buf) = m; | |
3682 | return obj; | |
657924ff DA |
3683 | } |
3684 | ||
2e471eb5 GM |
3685 | /* Put MARKER back on the free list after using it temporarily. */ |
3686 | ||
3687 | void | |
971de7fb | 3688 | free_marker (Lisp_Object marker) |
2e471eb5 | 3689 | { |
ef89c2ce | 3690 | unchain_marker (XMARKER (marker)); |
7b7990cc | 3691 | free_misc (marker); |
2e471eb5 GM |
3692 | } |
3693 | ||
c0696668 | 3694 | \f |
7146af97 | 3695 | /* Return a newly created vector or string with specified arguments as |
736471d1 RS |
3696 | elements. If all the arguments are characters that can fit |
3697 | in a string of events, make a string; otherwise, make a vector. | |
3698 | ||
3699 | Any number of arguments, even zero arguments, are allowed. */ | |
7146af97 JB |
3700 | |
3701 | Lisp_Object | |
0c90b9ee | 3702 | make_event_array (ptrdiff_t nargs, Lisp_Object *args) |
7146af97 | 3703 | { |
0c90b9ee | 3704 | ptrdiff_t i; |
7146af97 JB |
3705 | |
3706 | for (i = 0; i < nargs; i++) | |
736471d1 | 3707 | /* The things that fit in a string |
c9ca4659 RS |
3708 | are characters that are in 0...127, |
3709 | after discarding the meta bit and all the bits above it. */ | |
e687453f | 3710 | if (!INTEGERP (args[i]) |
c11285dc | 3711 | || (XINT (args[i]) & ~(-CHAR_META)) >= 0200) |
7146af97 JB |
3712 | return Fvector (nargs, args); |
3713 | ||
3714 | /* Since the loop exited, we know that all the things in it are | |
3715 | characters, so we can make a string. */ | |
3716 | { | |
c13ccad2 | 3717 | Lisp_Object result; |
177c0ea7 | 3718 | |
50aee051 | 3719 | result = Fmake_string (make_number (nargs), make_number (0)); |
7146af97 | 3720 | for (i = 0; i < nargs; i++) |
736471d1 | 3721 | { |
46e7e6b0 | 3722 | SSET (result, i, XINT (args[i])); |
736471d1 RS |
3723 | /* Move the meta bit to the right place for a string char. */ |
3724 | if (XINT (args[i]) & CHAR_META) | |
46e7e6b0 | 3725 | SSET (result, i, SREF (result, i) | 0x80); |
736471d1 | 3726 | } |
177c0ea7 | 3727 | |
7146af97 JB |
3728 | return result; |
3729 | } | |
3730 | } | |
2e471eb5 GM |
3731 | |
3732 | ||
7146af97 | 3733 | \f |
24d8a105 RS |
3734 | /************************************************************************ |
3735 | Memory Full Handling | |
3736 | ************************************************************************/ | |
3737 | ||
3738 | ||
531b0165 PE |
3739 | /* Called if malloc (NBYTES) returns zero. If NBYTES == SIZE_MAX, |
3740 | there may have been size_t overflow so that malloc was never | |
3741 | called, or perhaps malloc was invoked successfully but the | |
3742 | resulting pointer had problems fitting into a tagged EMACS_INT. In | |
3743 | either case this counts as memory being full even though malloc did | |
3744 | not fail. */ | |
24d8a105 RS |
3745 | |
3746 | void | |
531b0165 | 3747 | memory_full (size_t nbytes) |
24d8a105 | 3748 | { |
531b0165 | 3749 | /* Do not go into hysterics merely because a large request failed. */ |
fce31d69 | 3750 | bool enough_free_memory = 0; |
2b6148e4 | 3751 | if (SPARE_MEMORY < nbytes) |
531b0165 | 3752 | { |
66606eea PE |
3753 | void *p; |
3754 | ||
3755 | MALLOC_BLOCK_INPUT; | |
3756 | p = malloc (SPARE_MEMORY); | |
531b0165 PE |
3757 | if (p) |
3758 | { | |
4d09bcf6 | 3759 | free (p); |
531b0165 PE |
3760 | enough_free_memory = 1; |
3761 | } | |
66606eea | 3762 | MALLOC_UNBLOCK_INPUT; |
531b0165 | 3763 | } |
24d8a105 | 3764 | |
531b0165 PE |
3765 | if (! enough_free_memory) |
3766 | { | |
3767 | int i; | |
24d8a105 | 3768 | |
531b0165 PE |
3769 | Vmemory_full = Qt; |
3770 | ||
3771 | memory_full_cons_threshold = sizeof (struct cons_block); | |
3772 | ||
3773 | /* The first time we get here, free the spare memory. */ | |
faa52174 | 3774 | for (i = 0; i < ARRAYELTS (spare_memory); i++) |
531b0165 PE |
3775 | if (spare_memory[i]) |
3776 | { | |
3777 | if (i == 0) | |
3778 | free (spare_memory[i]); | |
3779 | else if (i >= 1 && i <= 4) | |
3780 | lisp_align_free (spare_memory[i]); | |
3781 | else | |
3782 | lisp_free (spare_memory[i]); | |
3783 | spare_memory[i] = 0; | |
3784 | } | |
531b0165 | 3785 | } |
24d8a105 RS |
3786 | |
3787 | /* This used to call error, but if we've run out of memory, we could | |
3788 | get infinite recursion trying to build the string. */ | |
9b306d37 | 3789 | xsignal (Qnil, Vmemory_signal_data); |
24d8a105 RS |
3790 | } |
3791 | ||
3792 | /* If we released our reserve (due to running out of memory), | |
3793 | and we have a fair amount free once again, | |
3794 | try to set aside another reserve in case we run out once more. | |
3795 | ||
3796 | This is called when a relocatable block is freed in ralloc.c, | |
3797 | and also directly from this file, in case we're not using ralloc.c. */ | |
3798 | ||
3799 | void | |
971de7fb | 3800 | refill_memory_reserve (void) |
24d8a105 RS |
3801 | { |
3802 | #ifndef SYSTEM_MALLOC | |
3803 | if (spare_memory[0] == 0) | |
38182d90 | 3804 | spare_memory[0] = malloc (SPARE_MEMORY); |
24d8a105 | 3805 | if (spare_memory[1] == 0) |
38182d90 | 3806 | spare_memory[1] = lisp_align_malloc (sizeof (struct cons_block), |
35aaa1ea | 3807 | MEM_TYPE_SPARE); |
24d8a105 | 3808 | if (spare_memory[2] == 0) |
38182d90 | 3809 | spare_memory[2] = lisp_align_malloc (sizeof (struct cons_block), |
35aaa1ea | 3810 | MEM_TYPE_SPARE); |
24d8a105 | 3811 | if (spare_memory[3] == 0) |
38182d90 | 3812 | spare_memory[3] = lisp_align_malloc (sizeof (struct cons_block), |
35aaa1ea | 3813 | MEM_TYPE_SPARE); |
24d8a105 | 3814 | if (spare_memory[4] == 0) |
38182d90 | 3815 | spare_memory[4] = lisp_align_malloc (sizeof (struct cons_block), |
35aaa1ea | 3816 | MEM_TYPE_SPARE); |
24d8a105 | 3817 | if (spare_memory[5] == 0) |
38182d90 | 3818 | spare_memory[5] = lisp_malloc (sizeof (struct string_block), |
35aaa1ea | 3819 | MEM_TYPE_SPARE); |
24d8a105 | 3820 | if (spare_memory[6] == 0) |
38182d90 | 3821 | spare_memory[6] = lisp_malloc (sizeof (struct string_block), |
35aaa1ea | 3822 | MEM_TYPE_SPARE); |
24d8a105 RS |
3823 | if (spare_memory[0] && spare_memory[1] && spare_memory[5]) |
3824 | Vmemory_full = Qnil; | |
3825 | #endif | |
3826 | } | |
3827 | \f | |
34400008 GM |
3828 | /************************************************************************ |
3829 | C Stack Marking | |
3830 | ************************************************************************/ | |
3831 | ||
13c844fb GM |
3832 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
3833 | ||
71cf5fa0 GM |
3834 | /* Conservative C stack marking requires a method to identify possibly |
3835 | live Lisp objects given a pointer value. We do this by keeping | |
3836 | track of blocks of Lisp data that are allocated in a red-black tree | |
3837 | (see also the comment of mem_node which is the type of nodes in | |
3838 | that tree). Function lisp_malloc adds information for an allocated | |
3839 | block to the red-black tree with calls to mem_insert, and function | |
3840 | lisp_free removes it with mem_delete. Functions live_string_p etc | |
3841 | call mem_find to lookup information about a given pointer in the | |
3842 | tree, and use that to determine if the pointer points to a Lisp | |
3843 | object or not. */ | |
3844 | ||
34400008 GM |
3845 | /* Initialize this part of alloc.c. */ |
3846 | ||
3847 | static void | |
971de7fb | 3848 | mem_init (void) |
34400008 GM |
3849 | { |
3850 | mem_z.left = mem_z.right = MEM_NIL; | |
3851 | mem_z.parent = NULL; | |
3852 | mem_z.color = MEM_BLACK; | |
3853 | mem_z.start = mem_z.end = NULL; | |
3854 | mem_root = MEM_NIL; | |
3855 | } | |
3856 | ||
3857 | ||
3858 | /* Value is a pointer to the mem_node containing START. Value is | |
3859 | MEM_NIL if there is no node in the tree containing START. */ | |
3860 | ||
b0ab8123 | 3861 | static struct mem_node * |
971de7fb | 3862 | mem_find (void *start) |
34400008 GM |
3863 | { |
3864 | struct mem_node *p; | |
3865 | ||
ece93c02 GM |
3866 | if (start < min_heap_address || start > max_heap_address) |
3867 | return MEM_NIL; | |
3868 | ||
34400008 GM |
3869 | /* Make the search always successful to speed up the loop below. */ |
3870 | mem_z.start = start; | |
3871 | mem_z.end = (char *) start + 1; | |
3872 | ||
3873 | p = mem_root; | |
3874 | while (start < p->start || start >= p->end) | |
3875 | p = start < p->start ? p->left : p->right; | |
3876 | return p; | |
3877 | } | |
3878 | ||
3879 | ||
3880 | /* Insert a new node into the tree for a block of memory with start | |
3881 | address START, end address END, and type TYPE. Value is a | |
3882 | pointer to the node that was inserted. */ | |
3883 | ||
3884 | static struct mem_node * | |
971de7fb | 3885 | mem_insert (void *start, void *end, enum mem_type type) |
34400008 GM |
3886 | { |
3887 | struct mem_node *c, *parent, *x; | |
3888 | ||
add3c3ea | 3889 | if (min_heap_address == NULL || start < min_heap_address) |
ece93c02 | 3890 | min_heap_address = start; |
add3c3ea | 3891 | if (max_heap_address == NULL || end > max_heap_address) |
ece93c02 GM |
3892 | max_heap_address = end; |
3893 | ||
34400008 GM |
3894 | /* See where in the tree a node for START belongs. In this |
3895 | particular application, it shouldn't happen that a node is already | |
3896 | present. For debugging purposes, let's check that. */ | |
3897 | c = mem_root; | |
3898 | parent = NULL; | |
3899 | ||
3900 | #if GC_MARK_STACK != GC_MAKE_GCPROS_NOOPS | |
177c0ea7 | 3901 | |
34400008 GM |
3902 | while (c != MEM_NIL) |
3903 | { | |
3904 | if (start >= c->start && start < c->end) | |
1088b922 | 3905 | emacs_abort (); |
34400008 GM |
3906 | parent = c; |
3907 | c = start < c->start ? c->left : c->right; | |
3908 | } | |
177c0ea7 | 3909 | |
34400008 | 3910 | #else /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ |
177c0ea7 | 3911 | |
34400008 GM |
3912 | while (c != MEM_NIL) |
3913 | { | |
3914 | parent = c; | |
3915 | c = start < c->start ? c->left : c->right; | |
3916 | } | |
177c0ea7 | 3917 | |
34400008 GM |
3918 | #endif /* GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS */ |
3919 | ||
3920 | /* Create a new node. */ | |
877935b1 | 3921 | #ifdef GC_MALLOC_CHECK |
0caaedb1 | 3922 | x = malloc (sizeof *x); |
877935b1 | 3923 | if (x == NULL) |
1088b922 | 3924 | emacs_abort (); |
877935b1 | 3925 | #else |
23f86fce | 3926 | x = xmalloc (sizeof *x); |
877935b1 | 3927 | #endif |
34400008 GM |
3928 | x->start = start; |
3929 | x->end = end; | |
3930 | x->type = type; | |
3931 | x->parent = parent; | |
3932 | x->left = x->right = MEM_NIL; | |
3933 | x->color = MEM_RED; | |
3934 | ||
3935 | /* Insert it as child of PARENT or install it as root. */ | |
3936 | if (parent) | |
3937 | { | |
3938 | if (start < parent->start) | |
3939 | parent->left = x; | |
3940 | else | |
3941 | parent->right = x; | |
3942 | } | |
177c0ea7 | 3943 | else |
34400008 GM |
3944 | mem_root = x; |
3945 | ||
3946 | /* Re-establish red-black tree properties. */ | |
3947 | mem_insert_fixup (x); | |
877935b1 | 3948 | |
34400008 GM |
3949 | return x; |
3950 | } | |
3951 | ||
3952 | ||
3953 | /* Re-establish the red-black properties of the tree, and thereby | |
3954 | balance the tree, after node X has been inserted; X is always red. */ | |
3955 | ||
3956 | static void | |
971de7fb | 3957 | mem_insert_fixup (struct mem_node *x) |
34400008 GM |
3958 | { |
3959 | while (x != mem_root && x->parent->color == MEM_RED) | |
3960 | { | |
3961 | /* X is red and its parent is red. This is a violation of | |
3962 | red-black tree property #3. */ | |
177c0ea7 | 3963 | |
34400008 GM |
3964 | if (x->parent == x->parent->parent->left) |
3965 | { | |
3966 | /* We're on the left side of our grandparent, and Y is our | |
3967 | "uncle". */ | |
3968 | struct mem_node *y = x->parent->parent->right; | |
177c0ea7 | 3969 | |
34400008 GM |
3970 | if (y->color == MEM_RED) |
3971 | { | |
3972 | /* Uncle and parent are red but should be black because | |
3973 | X is red. Change the colors accordingly and proceed | |
3974 | with the grandparent. */ | |
3975 | x->parent->color = MEM_BLACK; | |
3976 | y->color = MEM_BLACK; | |
3977 | x->parent->parent->color = MEM_RED; | |
3978 | x = x->parent->parent; | |
3979 | } | |
3980 | else | |
3981 | { | |
3982 | /* Parent and uncle have different colors; parent is | |
3983 | red, uncle is black. */ | |
3984 | if (x == x->parent->right) | |
3985 | { | |
3986 | x = x->parent; | |
3987 | mem_rotate_left (x); | |
3988 | } | |
3989 | ||
3990 | x->parent->color = MEM_BLACK; | |
3991 | x->parent->parent->color = MEM_RED; | |
3992 | mem_rotate_right (x->parent->parent); | |
3993 | } | |
3994 | } | |
3995 | else | |
3996 | { | |
3997 | /* This is the symmetrical case of above. */ | |
3998 | struct mem_node *y = x->parent->parent->left; | |
177c0ea7 | 3999 | |
34400008 GM |
4000 | if (y->color == MEM_RED) |
4001 | { | |
4002 | x->parent->color = MEM_BLACK; | |
4003 | y->color = MEM_BLACK; | |
4004 | x->parent->parent->color = MEM_RED; | |
4005 | x = x->parent->parent; | |
4006 | } | |
4007 | else | |
4008 | { | |
4009 | if (x == x->parent->left) | |
4010 | { | |
4011 | x = x->parent; | |
4012 | mem_rotate_right (x); | |
4013 | } | |
177c0ea7 | 4014 | |
34400008 GM |
4015 | x->parent->color = MEM_BLACK; |
4016 | x->parent->parent->color = MEM_RED; | |
4017 | mem_rotate_left (x->parent->parent); | |
4018 | } | |
4019 | } | |
4020 | } | |
4021 | ||
4022 | /* The root may have been changed to red due to the algorithm. Set | |
4023 | it to black so that property #5 is satisfied. */ | |
4024 | mem_root->color = MEM_BLACK; | |
4025 | } | |
4026 | ||
4027 | ||
177c0ea7 JB |
4028 | /* (x) (y) |
4029 | / \ / \ | |
34400008 GM |
4030 | a (y) ===> (x) c |
4031 | / \ / \ | |
4032 | b c a b */ | |
4033 | ||
4034 | static void | |
971de7fb | 4035 | mem_rotate_left (struct mem_node *x) |
34400008 GM |
4036 | { |
4037 | struct mem_node *y; | |
4038 | ||
4039 | /* Turn y's left sub-tree into x's right sub-tree. */ | |
4040 | y = x->right; | |
4041 | x->right = y->left; | |
4042 | if (y->left != MEM_NIL) | |
4043 | y->left->parent = x; | |
4044 | ||
4045 | /* Y's parent was x's parent. */ | |
4046 | if (y != MEM_NIL) | |
4047 | y->parent = x->parent; | |
4048 | ||
4049 | /* Get the parent to point to y instead of x. */ | |
4050 | if (x->parent) | |
4051 | { | |
4052 | if (x == x->parent->left) | |
4053 | x->parent->left = y; | |
4054 | else | |
4055 | x->parent->right = y; | |
4056 | } | |
4057 | else | |
4058 | mem_root = y; | |
4059 | ||
4060 | /* Put x on y's left. */ | |
4061 | y->left = x; | |
4062 | if (x != MEM_NIL) | |
4063 | x->parent = y; | |
4064 | } | |
4065 | ||
4066 | ||
177c0ea7 JB |
4067 | /* (x) (Y) |
4068 | / \ / \ | |
4069 | (y) c ===> a (x) | |
4070 | / \ / \ | |
34400008 GM |
4071 | a b b c */ |
4072 | ||
4073 | static void | |
971de7fb | 4074 | mem_rotate_right (struct mem_node *x) |
34400008 GM |
4075 | { |
4076 | struct mem_node *y = x->left; | |
4077 | ||
4078 | x->left = y->right; | |
4079 | if (y->right != MEM_NIL) | |
4080 | y->right->parent = x; | |
177c0ea7 | 4081 | |
34400008 GM |
4082 | if (y != MEM_NIL) |
4083 | y->parent = x->parent; | |
4084 | if (x->parent) | |
4085 | { | |
4086 | if (x == x->parent->right) | |
4087 | x->parent->right = y; | |
4088 | else | |
4089 | x->parent->left = y; | |
4090 | } | |
4091 | else | |
4092 | mem_root = y; | |
177c0ea7 | 4093 | |
34400008 GM |
4094 | y->right = x; |
4095 | if (x != MEM_NIL) | |
4096 | x->parent = y; | |
4097 | } | |
4098 | ||
4099 | ||
4100 | /* Delete node Z from the tree. If Z is null or MEM_NIL, do nothing. */ | |
4101 | ||
4102 | static void | |
971de7fb | 4103 | mem_delete (struct mem_node *z) |
34400008 GM |
4104 | { |
4105 | struct mem_node *x, *y; | |
4106 | ||
4107 | if (!z || z == MEM_NIL) | |
4108 | return; | |
4109 | ||
4110 | if (z->left == MEM_NIL || z->right == MEM_NIL) | |
4111 | y = z; | |
4112 | else | |
4113 | { | |
4114 | y = z->right; | |
4115 | while (y->left != MEM_NIL) | |
4116 | y = y->left; | |
4117 | } | |
4118 | ||
4119 | if (y->left != MEM_NIL) | |
4120 | x = y->left; | |
4121 | else | |
4122 | x = y->right; | |
4123 | ||
4124 | x->parent = y->parent; | |
4125 | if (y->parent) | |
4126 | { | |
4127 | if (y == y->parent->left) | |
4128 | y->parent->left = x; | |
4129 | else | |
4130 | y->parent->right = x; | |
4131 | } | |
4132 | else | |
4133 | mem_root = x; | |
4134 | ||
4135 | if (y != z) | |
4136 | { | |
4137 | z->start = y->start; | |
4138 | z->end = y->end; | |
4139 | z->type = y->type; | |
4140 | } | |
177c0ea7 | 4141 | |
34400008 GM |
4142 | if (y->color == MEM_BLACK) |
4143 | mem_delete_fixup (x); | |
877935b1 GM |
4144 | |
4145 | #ifdef GC_MALLOC_CHECK | |
0caaedb1 | 4146 | free (y); |
877935b1 | 4147 | #else |
34400008 | 4148 | xfree (y); |
877935b1 | 4149 | #endif |
34400008 GM |
4150 | } |
4151 | ||
4152 | ||
4153 | /* Re-establish the red-black properties of the tree, after a | |
4154 | deletion. */ | |
4155 | ||
4156 | static void | |
971de7fb | 4157 | mem_delete_fixup (struct mem_node *x) |
34400008 GM |
4158 | { |
4159 | while (x != mem_root && x->color == MEM_BLACK) | |
4160 | { | |
4161 | if (x == x->parent->left) | |
4162 | { | |
4163 | struct mem_node *w = x->parent->right; | |
177c0ea7 | 4164 | |
34400008 GM |
4165 | if (w->color == MEM_RED) |
4166 | { | |
4167 | w->color = MEM_BLACK; | |
4168 | x->parent->color = MEM_RED; | |
4169 | mem_rotate_left (x->parent); | |
4170 | w = x->parent->right; | |
4171 | } | |
177c0ea7 | 4172 | |
34400008 GM |
4173 | if (w->left->color == MEM_BLACK && w->right->color == MEM_BLACK) |
4174 | { | |
4175 | w->color = MEM_RED; | |
4176 | x = x->parent; | |
4177 | } | |
4178 | else | |
4179 | { | |
4180 | if (w->right->color == MEM_BLACK) | |
4181 | { | |
4182 | w->left->color = MEM_BLACK; | |
4183 | w->color = MEM_RED; | |
4184 | mem_rotate_right (w); | |
4185 | w = x->parent->right; | |
4186 | } | |
4187 | w->color = x->parent->color; | |
4188 | x->parent->color = MEM_BLACK; | |
4189 | w->right->color = MEM_BLACK; | |
4190 | mem_rotate_left (x->parent); | |
4191 | x = mem_root; | |
4192 | } | |
4193 | } | |
4194 | else | |
4195 | { | |
4196 | struct mem_node *w = x->parent->left; | |
177c0ea7 | 4197 | |
34400008 GM |
4198 | if (w->color == MEM_RED) |
4199 | { | |
4200 | w->color = MEM_BLACK; | |
4201 | x->parent->color = MEM_RED; | |
4202 | mem_rotate_right (x->parent); | |
4203 | w = x->parent->left; | |
4204 | } | |
177c0ea7 | 4205 | |
34400008 GM |
4206 | if (w->right->color == MEM_BLACK && w->left->color == MEM_BLACK) |
4207 | { | |
4208 | w->color = MEM_RED; | |
4209 | x = x->parent; | |
4210 | } | |
4211 | else | |
4212 | { | |
4213 | if (w->left->color == MEM_BLACK) | |
4214 | { | |
4215 | w->right->color = MEM_BLACK; | |
4216 | w->color = MEM_RED; | |
4217 | mem_rotate_left (w); | |
4218 | w = x->parent->left; | |
4219 | } | |
177c0ea7 | 4220 | |
34400008 GM |
4221 | w->color = x->parent->color; |
4222 | x->parent->color = MEM_BLACK; | |
4223 | w->left->color = MEM_BLACK; | |
4224 | mem_rotate_right (x->parent); | |
4225 | x = mem_root; | |
4226 | } | |
4227 | } | |
4228 | } | |
177c0ea7 | 4229 | |
34400008 GM |
4230 | x->color = MEM_BLACK; |
4231 | } | |
4232 | ||
4233 | ||
4234 | /* Value is non-zero if P is a pointer to a live Lisp string on | |
4235 | the heap. M is a pointer to the mem_block for P. */ | |
4236 | ||
b0ab8123 | 4237 | static bool |
971de7fb | 4238 | live_string_p (struct mem_node *m, void *p) |
34400008 GM |
4239 | { |
4240 | if (m->type == MEM_TYPE_STRING) | |
4241 | { | |
7d652d97 | 4242 | struct string_block *b = m->start; |
14162469 | 4243 | ptrdiff_t offset = (char *) p - (char *) &b->strings[0]; |
34400008 GM |
4244 | |
4245 | /* P must point to the start of a Lisp_String structure, and it | |
4246 | must not be on the free-list. */ | |
176bc847 GM |
4247 | return (offset >= 0 |
4248 | && offset % sizeof b->strings[0] == 0 | |
6b61353c | 4249 | && offset < (STRING_BLOCK_SIZE * sizeof b->strings[0]) |
34400008 GM |
4250 | && ((struct Lisp_String *) p)->data != NULL); |
4251 | } | |
4252 | else | |
4253 | return 0; | |
4254 | } | |
4255 | ||
4256 | ||
4257 | /* Value is non-zero if P is a pointer to a live Lisp cons on | |
4258 | the heap. M is a pointer to the mem_block for P. */ | |
4259 | ||
b0ab8123 | 4260 | static bool |
971de7fb | 4261 | live_cons_p (struct mem_node *m, void *p) |
34400008 GM |
4262 | { |
4263 | if (m->type == MEM_TYPE_CONS) | |
4264 | { | |
7d652d97 | 4265 | struct cons_block *b = m->start; |
14162469 | 4266 | ptrdiff_t offset = (char *) p - (char *) &b->conses[0]; |
34400008 GM |
4267 | |
4268 | /* P must point to the start of a Lisp_Cons, not be | |
4269 | one of the unused cells in the current cons block, | |
4270 | and not be on the free-list. */ | |
176bc847 GM |
4271 | return (offset >= 0 |
4272 | && offset % sizeof b->conses[0] == 0 | |
6b61353c | 4273 | && offset < (CONS_BLOCK_SIZE * sizeof b->conses[0]) |
34400008 GM |
4274 | && (b != cons_block |
4275 | || offset / sizeof b->conses[0] < cons_block_index) | |
c644523b | 4276 | && !EQ (((struct Lisp_Cons *) p)->car, Vdead)); |
34400008 GM |
4277 | } |
4278 | else | |
4279 | return 0; | |
4280 | } | |
4281 | ||
4282 | ||
4283 | /* Value is non-zero if P is a pointer to a live Lisp symbol on | |
4284 | the heap. M is a pointer to the mem_block for P. */ | |
4285 | ||
b0ab8123 | 4286 | static bool |
971de7fb | 4287 | live_symbol_p (struct mem_node *m, void *p) |
34400008 GM |
4288 | { |
4289 | if (m->type == MEM_TYPE_SYMBOL) | |
4290 | { | |
7d652d97 | 4291 | struct symbol_block *b = m->start; |
14162469 | 4292 | ptrdiff_t offset = (char *) p - (char *) &b->symbols[0]; |
177c0ea7 | 4293 | |
34400008 GM |
4294 | /* P must point to the start of a Lisp_Symbol, not be |
4295 | one of the unused cells in the current symbol block, | |
4296 | and not be on the free-list. */ | |
176bc847 GM |
4297 | return (offset >= 0 |
4298 | && offset % sizeof b->symbols[0] == 0 | |
6b61353c | 4299 | && offset < (SYMBOL_BLOCK_SIZE * sizeof b->symbols[0]) |
34400008 GM |
4300 | && (b != symbol_block |
4301 | || offset / sizeof b->symbols[0] < symbol_block_index) | |
c644523b | 4302 | && !EQ (((struct Lisp_Symbol *)p)->function, Vdead)); |
34400008 GM |
4303 | } |
4304 | else | |
4305 | return 0; | |
4306 | } | |
4307 | ||
4308 | ||
4309 | /* Value is non-zero if P is a pointer to a live Lisp float on | |
4310 | the heap. M is a pointer to the mem_block for P. */ | |
4311 | ||
b0ab8123 | 4312 | static bool |
971de7fb | 4313 | live_float_p (struct mem_node *m, void *p) |
34400008 GM |
4314 | { |
4315 | if (m->type == MEM_TYPE_FLOAT) | |
4316 | { | |
7d652d97 | 4317 | struct float_block *b = m->start; |
14162469 | 4318 | ptrdiff_t offset = (char *) p - (char *) &b->floats[0]; |
177c0ea7 | 4319 | |
ab6780cd SM |
4320 | /* P must point to the start of a Lisp_Float and not be |
4321 | one of the unused cells in the current float block. */ | |
176bc847 GM |
4322 | return (offset >= 0 |
4323 | && offset % sizeof b->floats[0] == 0 | |
6b61353c | 4324 | && offset < (FLOAT_BLOCK_SIZE * sizeof b->floats[0]) |
34400008 | 4325 | && (b != float_block |
ab6780cd | 4326 | || offset / sizeof b->floats[0] < float_block_index)); |
34400008 GM |
4327 | } |
4328 | else | |
4329 | return 0; | |
4330 | } | |
4331 | ||
4332 | ||
4333 | /* Value is non-zero if P is a pointer to a live Lisp Misc on | |
4334 | the heap. M is a pointer to the mem_block for P. */ | |
4335 | ||
b0ab8123 | 4336 | static bool |
971de7fb | 4337 | live_misc_p (struct mem_node *m, void *p) |
34400008 GM |
4338 | { |
4339 | if (m->type == MEM_TYPE_MISC) | |
4340 | { | |
7d652d97 | 4341 | struct marker_block *b = m->start; |
14162469 | 4342 | ptrdiff_t offset = (char *) p - (char *) &b->markers[0]; |
177c0ea7 | 4343 | |
34400008 GM |
4344 | /* P must point to the start of a Lisp_Misc, not be |
4345 | one of the unused cells in the current misc block, | |
4346 | and not be on the free-list. */ | |
176bc847 GM |
4347 | return (offset >= 0 |
4348 | && offset % sizeof b->markers[0] == 0 | |
6b61353c | 4349 | && offset < (MARKER_BLOCK_SIZE * sizeof b->markers[0]) |
34400008 GM |
4350 | && (b != marker_block |
4351 | || offset / sizeof b->markers[0] < marker_block_index) | |
d314756e | 4352 | && ((union Lisp_Misc *) p)->u_any.type != Lisp_Misc_Free); |
34400008 GM |
4353 | } |
4354 | else | |
4355 | return 0; | |
4356 | } | |
4357 | ||
4358 | ||
4359 | /* Value is non-zero if P is a pointer to a live vector-like object. | |
4360 | M is a pointer to the mem_block for P. */ | |
4361 | ||
b0ab8123 | 4362 | static bool |
971de7fb | 4363 | live_vector_p (struct mem_node *m, void *p) |
34400008 | 4364 | { |
f3372c87 DA |
4365 | if (m->type == MEM_TYPE_VECTOR_BLOCK) |
4366 | { | |
4367 | /* This memory node corresponds to a vector block. */ | |
7d652d97 | 4368 | struct vector_block *block = m->start; |
f3372c87 DA |
4369 | struct Lisp_Vector *vector = (struct Lisp_Vector *) block->data; |
4370 | ||
4371 | /* P is in the block's allocation range. Scan the block | |
4372 | up to P and see whether P points to the start of some | |
4373 | vector which is not on a free list. FIXME: check whether | |
4374 | some allocation patterns (probably a lot of short vectors) | |
4375 | may cause a substantial overhead of this loop. */ | |
4376 | while (VECTOR_IN_BLOCK (vector, block) | |
4377 | && vector <= (struct Lisp_Vector *) p) | |
4378 | { | |
914adc42 | 4379 | if (!PSEUDOVECTOR_TYPEP (&vector->header, PVEC_FREE) && vector == p) |
f3372c87 DA |
4380 | return 1; |
4381 | else | |
914adc42 | 4382 | vector = ADVANCE (vector, vector_nbytes (vector)); |
f3372c87 DA |
4383 | } |
4384 | } | |
91f2d272 | 4385 | else if (m->type == MEM_TYPE_VECTORLIKE && p == large_vector_vec (m->start)) |
f3372c87 DA |
4386 | /* This memory node corresponds to a large vector. */ |
4387 | return 1; | |
4388 | return 0; | |
34400008 GM |
4389 | } |
4390 | ||
4391 | ||
2336fe58 | 4392 | /* Value is non-zero if P is a pointer to a live buffer. M is a |
34400008 GM |
4393 | pointer to the mem_block for P. */ |
4394 | ||
b0ab8123 | 4395 | static bool |
971de7fb | 4396 | live_buffer_p (struct mem_node *m, void *p) |
34400008 GM |
4397 | { |
4398 | /* P must point to the start of the block, and the buffer | |
4399 | must not have been killed. */ | |
4400 | return (m->type == MEM_TYPE_BUFFER | |
4401 | && p == m->start | |
e34f7f79 | 4402 | && !NILP (((struct buffer *) p)->INTERNAL_FIELD (name))); |
34400008 GM |
4403 | } |
4404 | ||
13c844fb GM |
4405 | #endif /* GC_MARK_STACK || defined GC_MALLOC_CHECK */ |
4406 | ||
4407 | #if GC_MARK_STACK | |
4408 | ||
34400008 GM |
4409 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
4410 | ||
0c5307b0 DA |
4411 | /* Currently not used, but may be called from gdb. */ |
4412 | ||
4413 | void dump_zombies (void) EXTERNALLY_VISIBLE; | |
4414 | ||
34400008 | 4415 | /* Array of objects that are kept alive because the C stack contains |
f224e500 | 4416 | a pattern that looks like a reference to them. */ |
34400008 GM |
4417 | |
4418 | #define MAX_ZOMBIES 10 | |
4419 | static Lisp_Object zombies[MAX_ZOMBIES]; | |
4420 | ||
4421 | /* Number of zombie objects. */ | |
4422 | ||
211a0b2a | 4423 | static EMACS_INT nzombies; |
34400008 GM |
4424 | |
4425 | /* Number of garbage collections. */ | |
4426 | ||
211a0b2a | 4427 | static EMACS_INT ngcs; |
34400008 GM |
4428 | |
4429 | /* Average percentage of zombies per collection. */ | |
4430 | ||
4431 | static double avg_zombies; | |
4432 | ||
4433 | /* Max. number of live and zombie objects. */ | |
4434 | ||
211a0b2a | 4435 | static EMACS_INT max_live, max_zombies; |
34400008 GM |
4436 | |
4437 | /* Average number of live objects per GC. */ | |
4438 | ||
4439 | static double avg_live; | |
4440 | ||
a7ca3326 | 4441 | DEFUN ("gc-status", Fgc_status, Sgc_status, 0, 0, "", |
7ee72033 | 4442 | doc: /* Show information about live and zombie objects. */) |
5842a27b | 4443 | (void) |
34400008 | 4444 | { |
83fc9c63 | 4445 | Lisp_Object args[8], zombie_list = Qnil; |
211a0b2a | 4446 | EMACS_INT i; |
6e4b3fbe | 4447 | for (i = 0; i < min (MAX_ZOMBIES, nzombies); i++) |
83fc9c63 DL |
4448 | zombie_list = Fcons (zombies[i], zombie_list); |
4449 | args[0] = build_string ("%d GCs, avg live/zombies = %.2f/%.2f (%f%%), max %d/%d\nzombies: %S"); | |
34400008 GM |
4450 | args[1] = make_number (ngcs); |
4451 | args[2] = make_float (avg_live); | |
4452 | args[3] = make_float (avg_zombies); | |
4453 | args[4] = make_float (avg_zombies / avg_live / 100); | |
4454 | args[5] = make_number (max_live); | |
4455 | args[6] = make_number (max_zombies); | |
83fc9c63 DL |
4456 | args[7] = zombie_list; |
4457 | return Fmessage (8, args); | |
34400008 GM |
4458 | } |
4459 | ||
4460 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
4461 | ||
4462 | ||
182ff242 GM |
4463 | /* Mark OBJ if we can prove it's a Lisp_Object. */ |
4464 | ||
b0ab8123 | 4465 | static void |
971de7fb | 4466 | mark_maybe_object (Lisp_Object obj) |
182ff242 | 4467 | { |
b609f591 YM |
4468 | void *po; |
4469 | struct mem_node *m; | |
4470 | ||
a84683fd DC |
4471 | #if USE_VALGRIND |
4472 | if (valgrind_p) | |
4473 | VALGRIND_MAKE_MEM_DEFINED (&obj, sizeof (obj)); | |
4474 | #endif | |
4475 | ||
b609f591 YM |
4476 | if (INTEGERP (obj)) |
4477 | return; | |
4478 | ||
4479 | po = (void *) XPNTR (obj); | |
4480 | m = mem_find (po); | |
177c0ea7 | 4481 | |
182ff242 GM |
4482 | if (m != MEM_NIL) |
4483 | { | |
fce31d69 | 4484 | bool mark_p = 0; |
182ff242 | 4485 | |
8e50cc2d | 4486 | switch (XTYPE (obj)) |
182ff242 GM |
4487 | { |
4488 | case Lisp_String: | |
4489 | mark_p = (live_string_p (m, po) | |
4490 | && !STRING_MARKED_P ((struct Lisp_String *) po)); | |
4491 | break; | |
4492 | ||
4493 | case Lisp_Cons: | |
08b7c2cb | 4494 | mark_p = (live_cons_p (m, po) && !CONS_MARKED_P (XCONS (obj))); |
182ff242 GM |
4495 | break; |
4496 | ||
4497 | case Lisp_Symbol: | |
2336fe58 | 4498 | mark_p = (live_symbol_p (m, po) && !XSYMBOL (obj)->gcmarkbit); |
182ff242 GM |
4499 | break; |
4500 | ||
4501 | case Lisp_Float: | |
ab6780cd | 4502 | mark_p = (live_float_p (m, po) && !FLOAT_MARKED_P (XFLOAT (obj))); |
182ff242 GM |
4503 | break; |
4504 | ||
4505 | case Lisp_Vectorlike: | |
8e50cc2d | 4506 | /* Note: can't check BUFFERP before we know it's a |
182ff242 GM |
4507 | buffer because checking that dereferences the pointer |
4508 | PO which might point anywhere. */ | |
4509 | if (live_vector_p (m, po)) | |
8e50cc2d | 4510 | mark_p = !SUBRP (obj) && !VECTOR_MARKED_P (XVECTOR (obj)); |
182ff242 | 4511 | else if (live_buffer_p (m, po)) |
8e50cc2d | 4512 | mark_p = BUFFERP (obj) && !VECTOR_MARKED_P (XBUFFER (obj)); |
182ff242 GM |
4513 | break; |
4514 | ||
4515 | case Lisp_Misc: | |
67ee9f6e | 4516 | mark_p = (live_misc_p (m, po) && !XMISCANY (obj)->gcmarkbit); |
182ff242 | 4517 | break; |
6bbd7a29 | 4518 | |
2de9f71c | 4519 | default: |
6bbd7a29 | 4520 | break; |
182ff242 GM |
4521 | } |
4522 | ||
4523 | if (mark_p) | |
4524 | { | |
4525 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4526 | if (nzombies < MAX_ZOMBIES) | |
83fc9c63 | 4527 | zombies[nzombies] = obj; |
182ff242 GM |
4528 | ++nzombies; |
4529 | #endif | |
49723c04 | 4530 | mark_object (obj); |
182ff242 GM |
4531 | } |
4532 | } | |
4533 | } | |
ece93c02 GM |
4534 | |
4535 | ||
4536 | /* If P points to Lisp data, mark that as live if it isn't already | |
4537 | marked. */ | |
4538 | ||
b0ab8123 | 4539 | static void |
971de7fb | 4540 | mark_maybe_pointer (void *p) |
ece93c02 GM |
4541 | { |
4542 | struct mem_node *m; | |
4543 | ||
a84683fd DC |
4544 | #if USE_VALGRIND |
4545 | if (valgrind_p) | |
4546 | VALGRIND_MAKE_MEM_DEFINED (&p, sizeof (p)); | |
4547 | #endif | |
4548 | ||
bfe3e0a2 | 4549 | /* Quickly rule out some values which can't point to Lisp data. |
2b90362b | 4550 | USE_LSB_TAG needs Lisp data to be aligned on multiples of GCALIGNMENT. |
bfe3e0a2 | 4551 | Otherwise, assume that Lisp data is aligned on even addresses. */ |
2b90362b | 4552 | if ((intptr_t) p % (USE_LSB_TAG ? GCALIGNMENT : 2)) |
ece93c02 | 4553 | return; |
177c0ea7 | 4554 | |
ece93c02 GM |
4555 | m = mem_find (p); |
4556 | if (m != MEM_NIL) | |
4557 | { | |
4558 | Lisp_Object obj = Qnil; | |
177c0ea7 | 4559 | |
ece93c02 GM |
4560 | switch (m->type) |
4561 | { | |
4562 | case MEM_TYPE_NON_LISP: | |
5474c384 | 4563 | case MEM_TYPE_SPARE: |
2fe50224 | 4564 | /* Nothing to do; not a pointer to Lisp memory. */ |
ece93c02 | 4565 | break; |
177c0ea7 | 4566 | |
ece93c02 | 4567 | case MEM_TYPE_BUFFER: |
5e617bc2 | 4568 | if (live_buffer_p (m, p) && !VECTOR_MARKED_P ((struct buffer *)p)) |
ece93c02 GM |
4569 | XSETVECTOR (obj, p); |
4570 | break; | |
177c0ea7 | 4571 | |
ece93c02 | 4572 | case MEM_TYPE_CONS: |
08b7c2cb | 4573 | if (live_cons_p (m, p) && !CONS_MARKED_P ((struct Lisp_Cons *) p)) |
ece93c02 GM |
4574 | XSETCONS (obj, p); |
4575 | break; | |
177c0ea7 | 4576 | |
ece93c02 GM |
4577 | case MEM_TYPE_STRING: |
4578 | if (live_string_p (m, p) | |
4579 | && !STRING_MARKED_P ((struct Lisp_String *) p)) | |
4580 | XSETSTRING (obj, p); | |
4581 | break; | |
4582 | ||
4583 | case MEM_TYPE_MISC: | |
2336fe58 SM |
4584 | if (live_misc_p (m, p) && !((struct Lisp_Free *) p)->gcmarkbit) |
4585 | XSETMISC (obj, p); | |
ece93c02 | 4586 | break; |
177c0ea7 | 4587 | |
ece93c02 | 4588 | case MEM_TYPE_SYMBOL: |
2336fe58 | 4589 | if (live_symbol_p (m, p) && !((struct Lisp_Symbol *) p)->gcmarkbit) |
ece93c02 GM |
4590 | XSETSYMBOL (obj, p); |
4591 | break; | |
177c0ea7 | 4592 | |
ece93c02 | 4593 | case MEM_TYPE_FLOAT: |
ab6780cd | 4594 | if (live_float_p (m, p) && !FLOAT_MARKED_P (p)) |
ece93c02 GM |
4595 | XSETFLOAT (obj, p); |
4596 | break; | |
177c0ea7 | 4597 | |
9c545a55 | 4598 | case MEM_TYPE_VECTORLIKE: |
f3372c87 | 4599 | case MEM_TYPE_VECTOR_BLOCK: |
ece93c02 GM |
4600 | if (live_vector_p (m, p)) |
4601 | { | |
4602 | Lisp_Object tem; | |
4603 | XSETVECTOR (tem, p); | |
8e50cc2d | 4604 | if (!SUBRP (tem) && !VECTOR_MARKED_P (XVECTOR (tem))) |
ece93c02 GM |
4605 | obj = tem; |
4606 | } | |
4607 | break; | |
4608 | ||
4609 | default: | |
1088b922 | 4610 | emacs_abort (); |
ece93c02 GM |
4611 | } |
4612 | ||
8e50cc2d | 4613 | if (!NILP (obj)) |
49723c04 | 4614 | mark_object (obj); |
ece93c02 GM |
4615 | } |
4616 | } | |
4617 | ||
4618 | ||
e32a5799 | 4619 | /* Alignment of pointer values. Use alignof, as it sometimes returns |
e3fb2efb PE |
4620 | a smaller alignment than GCC's __alignof__ and mark_memory might |
4621 | miss objects if __alignof__ were used. */ | |
e32a5799 | 4622 | #define GC_POINTER_ALIGNMENT alignof (void *) |
3164aeac | 4623 | |
e3fb2efb PE |
4624 | /* Define POINTERS_MIGHT_HIDE_IN_OBJECTS to 1 if marking via C pointers does |
4625 | not suffice, which is the typical case. A host where a Lisp_Object is | |
4626 | wider than a pointer might allocate a Lisp_Object in non-adjacent halves. | |
4627 | If USE_LSB_TAG, the bottom half is not a valid pointer, but it should | |
4628 | suffice to widen it to to a Lisp_Object and check it that way. */ | |
bfe3e0a2 PE |
4629 | #if USE_LSB_TAG || VAL_MAX < UINTPTR_MAX |
4630 | # if !USE_LSB_TAG && VAL_MAX < UINTPTR_MAX >> GCTYPEBITS | |
e3fb2efb PE |
4631 | /* If tag bits straddle pointer-word boundaries, neither mark_maybe_pointer |
4632 | nor mark_maybe_object can follow the pointers. This should not occur on | |
4633 | any practical porting target. */ | |
4634 | # error "MSB type bits straddle pointer-word boundaries" | |
4635 | # endif | |
4636 | /* Marking via C pointers does not suffice, because Lisp_Objects contain | |
4637 | pointer words that hold pointers ORed with type bits. */ | |
4638 | # define POINTERS_MIGHT_HIDE_IN_OBJECTS 1 | |
4639 | #else | |
4640 | /* Marking via C pointers suffices, because Lisp_Objects contain pointer | |
4641 | words that hold unmodified pointers. */ | |
4642 | # define POINTERS_MIGHT_HIDE_IN_OBJECTS 0 | |
4643 | #endif | |
4644 | ||
55a314a5 YM |
4645 | /* Mark Lisp objects referenced from the address range START+OFFSET..END |
4646 | or END+OFFSET..START. */ | |
34400008 | 4647 | |
e76119d7 | 4648 | static void ATTRIBUTE_NO_SANITIZE_ADDRESS |
3164aeac | 4649 | mark_memory (void *start, void *end) |
34400008 | 4650 | { |
ece93c02 | 4651 | void **pp; |
3164aeac | 4652 | int i; |
34400008 GM |
4653 | |
4654 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4655 | nzombies = 0; | |
4656 | #endif | |
4657 | ||
4658 | /* Make START the pointer to the start of the memory region, | |
4659 | if it isn't already. */ | |
4660 | if (end < start) | |
4661 | { | |
4662 | void *tem = start; | |
4663 | start = end; | |
4664 | end = tem; | |
4665 | } | |
ece93c02 | 4666 | |
ece93c02 GM |
4667 | /* Mark Lisp data pointed to. This is necessary because, in some |
4668 | situations, the C compiler optimizes Lisp objects away, so that | |
4669 | only a pointer to them remains. Example: | |
4670 | ||
4671 | DEFUN ("testme", Ftestme, Stestme, 0, 0, 0, "") | |
7ee72033 | 4672 | () |
ece93c02 GM |
4673 | { |
4674 | Lisp_Object obj = build_string ("test"); | |
4675 | struct Lisp_String *s = XSTRING (obj); | |
4676 | Fgarbage_collect (); | |
4677 | fprintf (stderr, "test `%s'\n", s->data); | |
4678 | return Qnil; | |
4679 | } | |
4680 | ||
4681 | Here, `obj' isn't really used, and the compiler optimizes it | |
4682 | away. The only reference to the life string is through the | |
4683 | pointer `s'. */ | |
177c0ea7 | 4684 | |
3164aeac PE |
4685 | for (pp = start; (void *) pp < end; pp++) |
4686 | for (i = 0; i < sizeof *pp; i += GC_POINTER_ALIGNMENT) | |
27f3c637 | 4687 | { |
e3fb2efb PE |
4688 | void *p = *(void **) ((char *) pp + i); |
4689 | mark_maybe_pointer (p); | |
4690 | if (POINTERS_MIGHT_HIDE_IN_OBJECTS) | |
646b5f55 | 4691 | mark_maybe_object (XIL ((intptr_t) p)); |
27f3c637 | 4692 | } |
182ff242 GM |
4693 | } |
4694 | ||
182ff242 GM |
4695 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS |
4696 | ||
fce31d69 PE |
4697 | static bool setjmp_tested_p; |
4698 | static int longjmps_done; | |
182ff242 GM |
4699 | |
4700 | #define SETJMP_WILL_LIKELY_WORK "\ | |
4701 | \n\ | |
4702 | Emacs garbage collector has been changed to use conservative stack\n\ | |
4703 | marking. Emacs has determined that the method it uses to do the\n\ | |
4704 | marking will likely work on your system, but this isn't sure.\n\ | |
4705 | \n\ | |
4706 | If you are a system-programmer, or can get the help of a local wizard\n\ | |
4707 | who is, please take a look at the function mark_stack in alloc.c, and\n\ | |
4708 | verify that the methods used are appropriate for your system.\n\ | |
4709 | \n\ | |
d191623b | 4710 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
4711 | " |
4712 | ||
4713 | #define SETJMP_WILL_NOT_WORK "\ | |
4714 | \n\ | |
4715 | Emacs garbage collector has been changed to use conservative stack\n\ | |
4716 | marking. Emacs has determined that the default method it uses to do the\n\ | |
4717 | marking will not work on your system. We will need a system-dependent\n\ | |
4718 | solution for your system.\n\ | |
4719 | \n\ | |
4720 | Please take a look at the function mark_stack in alloc.c, and\n\ | |
4721 | try to find a way to make it work on your system.\n\ | |
30f637f8 DL |
4722 | \n\ |
4723 | Note that you may get false negatives, depending on the compiler.\n\ | |
4724 | In particular, you need to use -O with GCC for this test.\n\ | |
4725 | \n\ | |
d191623b | 4726 | Please mail the result to <emacs-devel@gnu.org>.\n\ |
182ff242 GM |
4727 | " |
4728 | ||
4729 | ||
4730 | /* Perform a quick check if it looks like setjmp saves registers in a | |
4731 | jmp_buf. Print a message to stderr saying so. When this test | |
4732 | succeeds, this is _not_ a proof that setjmp is sufficient for | |
4733 | conservative stack marking. Only the sources or a disassembly | |
4734 | can prove that. */ | |
4735 | ||
4736 | static void | |
2018939f | 4737 | test_setjmp (void) |
182ff242 GM |
4738 | { |
4739 | char buf[10]; | |
4740 | register int x; | |
0328b6de | 4741 | sys_jmp_buf jbuf; |
182ff242 GM |
4742 | |
4743 | /* Arrange for X to be put in a register. */ | |
4744 | sprintf (buf, "1"); | |
4745 | x = strlen (buf); | |
4746 | x = 2 * x - 1; | |
4747 | ||
0328b6de | 4748 | sys_setjmp (jbuf); |
182ff242 | 4749 | if (longjmps_done == 1) |
34400008 | 4750 | { |
182ff242 | 4751 | /* Came here after the longjmp at the end of the function. |
34400008 | 4752 | |
182ff242 GM |
4753 | If x == 1, the longjmp has restored the register to its |
4754 | value before the setjmp, and we can hope that setjmp | |
4755 | saves all such registers in the jmp_buf, although that | |
4756 | isn't sure. | |
34400008 | 4757 | |
182ff242 GM |
4758 | For other values of X, either something really strange is |
4759 | taking place, or the setjmp just didn't save the register. */ | |
4760 | ||
4761 | if (x == 1) | |
4762 | fprintf (stderr, SETJMP_WILL_LIKELY_WORK); | |
4763 | else | |
4764 | { | |
4765 | fprintf (stderr, SETJMP_WILL_NOT_WORK); | |
4766 | exit (1); | |
34400008 GM |
4767 | } |
4768 | } | |
182ff242 GM |
4769 | |
4770 | ++longjmps_done; | |
4771 | x = 2; | |
4772 | if (longjmps_done == 1) | |
0328b6de | 4773 | sys_longjmp (jbuf, 1); |
34400008 GM |
4774 | } |
4775 | ||
182ff242 GM |
4776 | #endif /* not GC_SAVE_REGISTERS_ON_STACK && not GC_SETJMP_WORKS */ |
4777 | ||
34400008 GM |
4778 | |
4779 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
4780 | ||
4781 | /* Abort if anything GCPRO'd doesn't survive the GC. */ | |
4782 | ||
4783 | static void | |
2018939f | 4784 | check_gcpros (void) |
34400008 GM |
4785 | { |
4786 | struct gcpro *p; | |
f66c7cf8 | 4787 | ptrdiff_t i; |
34400008 GM |
4788 | |
4789 | for (p = gcprolist; p; p = p->next) | |
4790 | for (i = 0; i < p->nvars; ++i) | |
4791 | if (!survives_gc_p (p->var[i])) | |
92cc28b2 SM |
4792 | /* FIXME: It's not necessarily a bug. It might just be that the |
4793 | GCPRO is unnecessary or should release the object sooner. */ | |
1088b922 | 4794 | emacs_abort (); |
34400008 GM |
4795 | } |
4796 | ||
4797 | #elif GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
4798 | ||
0c5307b0 | 4799 | void |
2018939f | 4800 | dump_zombies (void) |
34400008 GM |
4801 | { |
4802 | int i; | |
4803 | ||
6e4b3fbe | 4804 | fprintf (stderr, "\nZombies kept alive = %"pI"d:\n", nzombies); |
34400008 GM |
4805 | for (i = 0; i < min (MAX_ZOMBIES, nzombies); ++i) |
4806 | { | |
4807 | fprintf (stderr, " %d = ", i); | |
4808 | debug_print (zombies[i]); | |
4809 | } | |
4810 | } | |
4811 | ||
4812 | #endif /* GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES */ | |
4813 | ||
4814 | ||
182ff242 GM |
4815 | /* Mark live Lisp objects on the C stack. |
4816 | ||
4817 | There are several system-dependent problems to consider when | |
4818 | porting this to new architectures: | |
4819 | ||
4820 | Processor Registers | |
4821 | ||
4822 | We have to mark Lisp objects in CPU registers that can hold local | |
4823 | variables or are used to pass parameters. | |
4824 | ||
4825 | If GC_SAVE_REGISTERS_ON_STACK is defined, it should expand to | |
4826 | something that either saves relevant registers on the stack, or | |
4827 | calls mark_maybe_object passing it each register's contents. | |
4828 | ||
4829 | If GC_SAVE_REGISTERS_ON_STACK is not defined, the current | |
4830 | implementation assumes that calling setjmp saves registers we need | |
4831 | to see in a jmp_buf which itself lies on the stack. This doesn't | |
4832 | have to be true! It must be verified for each system, possibly | |
4833 | by taking a look at the source code of setjmp. | |
4834 | ||
2018939f AS |
4835 | If __builtin_unwind_init is available (defined by GCC >= 2.8) we |
4836 | can use it as a machine independent method to store all registers | |
4837 | to the stack. In this case the macros described in the previous | |
4838 | two paragraphs are not used. | |
4839 | ||
182ff242 GM |
4840 | Stack Layout |
4841 | ||
4842 | Architectures differ in the way their processor stack is organized. | |
4843 | For example, the stack might look like this | |
4844 | ||
4845 | +----------------+ | |
4846 | | Lisp_Object | size = 4 | |
4847 | +----------------+ | |
4848 | | something else | size = 2 | |
4849 | +----------------+ | |
4850 | | Lisp_Object | size = 4 | |
4851 | +----------------+ | |
4852 | | ... | | |
4853 | ||
4854 | In such a case, not every Lisp_Object will be aligned equally. To | |
4855 | find all Lisp_Object on the stack it won't be sufficient to walk | |
4856 | the stack in steps of 4 bytes. Instead, two passes will be | |
4857 | necessary, one starting at the start of the stack, and a second | |
4858 | pass starting at the start of the stack + 2. Likewise, if the | |
4859 | minimal alignment of Lisp_Objects on the stack is 1, four passes | |
4860 | would be necessary, each one starting with one byte more offset | |
c9af454e | 4861 | from the stack start. */ |
34400008 GM |
4862 | |
4863 | static void | |
971de7fb | 4864 | mark_stack (void) |
34400008 | 4865 | { |
34400008 GM |
4866 | void *end; |
4867 | ||
2018939f AS |
4868 | #ifdef HAVE___BUILTIN_UNWIND_INIT |
4869 | /* Force callee-saved registers and register windows onto the stack. | |
4870 | This is the preferred method if available, obviating the need for | |
4871 | machine dependent methods. */ | |
4872 | __builtin_unwind_init (); | |
4873 | end = &end; | |
4874 | #else /* not HAVE___BUILTIN_UNWIND_INIT */ | |
dff45157 PE |
4875 | #ifndef GC_SAVE_REGISTERS_ON_STACK |
4876 | /* jmp_buf may not be aligned enough on darwin-ppc64 */ | |
4877 | union aligned_jmpbuf { | |
4878 | Lisp_Object o; | |
0328b6de | 4879 | sys_jmp_buf j; |
dff45157 | 4880 | } j; |
fce31d69 | 4881 | volatile bool stack_grows_down_p = (char *) &j > (char *) stack_base; |
dff45157 | 4882 | #endif |
34400008 GM |
4883 | /* This trick flushes the register windows so that all the state of |
4884 | the process is contained in the stack. */ | |
ab6780cd | 4885 | /* Fixme: Code in the Boehm GC suggests flushing (with `flushrs') is |
422eec7e DL |
4886 | needed on ia64 too. See mach_dep.c, where it also says inline |
4887 | assembler doesn't work with relevant proprietary compilers. */ | |
4a00783e | 4888 | #ifdef __sparc__ |
4d18a7a2 DN |
4889 | #if defined (__sparc64__) && defined (__FreeBSD__) |
4890 | /* FreeBSD does not have a ta 3 handler. */ | |
4c1616be CY |
4891 | asm ("flushw"); |
4892 | #else | |
34400008 | 4893 | asm ("ta 3"); |
4c1616be | 4894 | #endif |
34400008 | 4895 | #endif |
177c0ea7 | 4896 | |
34400008 GM |
4897 | /* Save registers that we need to see on the stack. We need to see |
4898 | registers used to hold register variables and registers used to | |
4899 | pass parameters. */ | |
4900 | #ifdef GC_SAVE_REGISTERS_ON_STACK | |
4901 | GC_SAVE_REGISTERS_ON_STACK (end); | |
182ff242 | 4902 | #else /* not GC_SAVE_REGISTERS_ON_STACK */ |
177c0ea7 | 4903 | |
182ff242 GM |
4904 | #ifndef GC_SETJMP_WORKS /* If it hasn't been checked yet that |
4905 | setjmp will definitely work, test it | |
4906 | and print a message with the result | |
4907 | of the test. */ | |
4908 | if (!setjmp_tested_p) | |
4909 | { | |
4910 | setjmp_tested_p = 1; | |
4911 | test_setjmp (); | |
4912 | } | |
4913 | #endif /* GC_SETJMP_WORKS */ | |
177c0ea7 | 4914 | |
0328b6de | 4915 | sys_setjmp (j.j); |
34400008 | 4916 | end = stack_grows_down_p ? (char *) &j + sizeof j : (char *) &j; |
182ff242 | 4917 | #endif /* not GC_SAVE_REGISTERS_ON_STACK */ |
2018939f | 4918 | #endif /* not HAVE___BUILTIN_UNWIND_INIT */ |
34400008 GM |
4919 | |
4920 | /* This assumes that the stack is a contiguous region in memory. If | |
182ff242 GM |
4921 | that's not the case, something has to be done here to iterate |
4922 | over the stack segments. */ | |
3164aeac PE |
4923 | mark_memory (stack_base, end); |
4924 | ||
4dec23ff AS |
4925 | /* Allow for marking a secondary stack, like the register stack on the |
4926 | ia64. */ | |
4927 | #ifdef GC_MARK_SECONDARY_STACK | |
4928 | GC_MARK_SECONDARY_STACK (); | |
4929 | #endif | |
34400008 GM |
4930 | |
4931 | #if GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS | |
4932 | check_gcpros (); | |
4933 | #endif | |
4934 | } | |
4935 | ||
0c5307b0 DA |
4936 | #else /* GC_MARK_STACK == 0 */ |
4937 | ||
4938 | #define mark_maybe_object(obj) emacs_abort () | |
4939 | ||
34400008 GM |
4940 | #endif /* GC_MARK_STACK != 0 */ |
4941 | ||
4942 | ||
7ffb6955 | 4943 | /* Determine whether it is safe to access memory at address P. */ |
d3d47262 | 4944 | static int |
971de7fb | 4945 | valid_pointer_p (void *p) |
7ffb6955 | 4946 | { |
f892cf9c EZ |
4947 | #ifdef WINDOWSNT |
4948 | return w32_valid_pointer_p (p, 16); | |
4949 | #else | |
41bed37d | 4950 | int fd[2]; |
7ffb6955 KS |
4951 | |
4952 | /* Obviously, we cannot just access it (we would SEGV trying), so we | |
4953 | trick the o/s to tell us whether p is a valid pointer. | |
4954 | Unfortunately, we cannot use NULL_DEVICE here, as emacs_write may | |
4955 | not validate p in that case. */ | |
4956 | ||
c7ddc792 | 4957 | if (emacs_pipe (fd) == 0) |
7ffb6955 | 4958 | { |
223752d7 | 4959 | bool valid = emacs_write (fd[1], p, 16) == 16; |
41bed37d PE |
4960 | emacs_close (fd[1]); |
4961 | emacs_close (fd[0]); | |
7ffb6955 KS |
4962 | return valid; |
4963 | } | |
4964 | ||
4965 | return -1; | |
f892cf9c | 4966 | #endif |
7ffb6955 | 4967 | } |
3cd55735 | 4968 | |
6cda572a DA |
4969 | /* Return 2 if OBJ is a killed or special buffer object, 1 if OBJ is a |
4970 | valid lisp object, 0 if OBJ is NOT a valid lisp object, or -1 if we | |
4971 | cannot validate OBJ. This function can be quite slow, so its primary | |
4972 | use is the manual debugging. The only exception is print_object, where | |
4973 | we use it to check whether the memory referenced by the pointer of | |
4974 | Lisp_Save_Value object contains valid objects. */ | |
3cd55735 KS |
4975 | |
4976 | int | |
971de7fb | 4977 | valid_lisp_object_p (Lisp_Object obj) |
3cd55735 | 4978 | { |
de7124a7 | 4979 | void *p; |
7ffb6955 | 4980 | #if GC_MARK_STACK |
3cd55735 | 4981 | struct mem_node *m; |
de7124a7 | 4982 | #endif |
3cd55735 KS |
4983 | |
4984 | if (INTEGERP (obj)) | |
4985 | return 1; | |
4986 | ||
4987 | p = (void *) XPNTR (obj); | |
3cd55735 KS |
4988 | if (PURE_POINTER_P (p)) |
4989 | return 1; | |
4990 | ||
c1ca42ca DA |
4991 | if (p == &buffer_defaults || p == &buffer_local_symbols) |
4992 | return 2; | |
4993 | ||
de7124a7 | 4994 | #if !GC_MARK_STACK |
7ffb6955 | 4995 | return valid_pointer_p (p); |
de7124a7 KS |
4996 | #else |
4997 | ||
3cd55735 KS |
4998 | m = mem_find (p); |
4999 | ||
5000 | if (m == MEM_NIL) | |
7ffb6955 KS |
5001 | { |
5002 | int valid = valid_pointer_p (p); | |
5003 | if (valid <= 0) | |
5004 | return valid; | |
5005 | ||
5006 | if (SUBRP (obj)) | |
5007 | return 1; | |
5008 | ||
5009 | return 0; | |
5010 | } | |
3cd55735 KS |
5011 | |
5012 | switch (m->type) | |
5013 | { | |
5014 | case MEM_TYPE_NON_LISP: | |
5474c384 | 5015 | case MEM_TYPE_SPARE: |
3cd55735 KS |
5016 | return 0; |
5017 | ||
5018 | case MEM_TYPE_BUFFER: | |
c1ca42ca | 5019 | return live_buffer_p (m, p) ? 1 : 2; |
3cd55735 KS |
5020 | |
5021 | case MEM_TYPE_CONS: | |
5022 | return live_cons_p (m, p); | |
5023 | ||
5024 | case MEM_TYPE_STRING: | |
5025 | return live_string_p (m, p); | |
5026 | ||
5027 | case MEM_TYPE_MISC: | |
5028 | return live_misc_p (m, p); | |
5029 | ||
5030 | case MEM_TYPE_SYMBOL: | |
5031 | return live_symbol_p (m, p); | |
5032 | ||
5033 | case MEM_TYPE_FLOAT: | |
5034 | return live_float_p (m, p); | |
5035 | ||
9c545a55 | 5036 | case MEM_TYPE_VECTORLIKE: |
f3372c87 | 5037 | case MEM_TYPE_VECTOR_BLOCK: |
3cd55735 KS |
5038 | return live_vector_p (m, p); |
5039 | ||
5040 | default: | |
5041 | break; | |
5042 | } | |
5043 | ||
5044 | return 0; | |
5045 | #endif | |
5046 | } | |
5047 | ||
5048 | ||
5049 | ||
34400008 | 5050 | \f |
2e471eb5 GM |
5051 | /*********************************************************************** |
5052 | Pure Storage Management | |
5053 | ***********************************************************************/ | |
5054 | ||
1f0b3fd2 GM |
5055 | /* Allocate room for SIZE bytes from pure Lisp storage and return a |
5056 | pointer to it. TYPE is the Lisp type for which the memory is | |
e5bc14d4 | 5057 | allocated. TYPE < 0 means it's not used for a Lisp object. */ |
1f0b3fd2 | 5058 | |
261cb4bb | 5059 | static void * |
971de7fb | 5060 | pure_alloc (size_t size, int type) |
1f0b3fd2 | 5061 | { |
261cb4bb | 5062 | void *result; |
bfe3e0a2 | 5063 | #if USE_LSB_TAG |
2b90362b | 5064 | size_t alignment = GCALIGNMENT; |
6b61353c | 5065 | #else |
e32a5799 | 5066 | size_t alignment = alignof (EMACS_INT); |
1f0b3fd2 GM |
5067 | |
5068 | /* Give Lisp_Floats an extra alignment. */ | |
5069 | if (type == Lisp_Float) | |
e32a5799 | 5070 | alignment = alignof (struct Lisp_Float); |
6b61353c | 5071 | #endif |
1f0b3fd2 | 5072 | |
44117420 | 5073 | again: |
e5bc14d4 YM |
5074 | if (type >= 0) |
5075 | { | |
5076 | /* Allocate space for a Lisp object from the beginning of the free | |
5077 | space with taking account of alignment. */ | |
5078 | result = ALIGN (purebeg + pure_bytes_used_lisp, alignment); | |
5079 | pure_bytes_used_lisp = ((char *)result - (char *)purebeg) + size; | |
5080 | } | |
5081 | else | |
5082 | { | |
5083 | /* Allocate space for a non-Lisp object from the end of the free | |
5084 | space. */ | |
5085 | pure_bytes_used_non_lisp += size; | |
5086 | result = purebeg + pure_size - pure_bytes_used_non_lisp; | |
5087 | } | |
5088 | pure_bytes_used = pure_bytes_used_lisp + pure_bytes_used_non_lisp; | |
44117420 KS |
5089 | |
5090 | if (pure_bytes_used <= pure_size) | |
5091 | return result; | |
5092 | ||
5093 | /* Don't allocate a large amount here, | |
5094 | because it might get mmap'd and then its address | |
5095 | might not be usable. */ | |
23f86fce | 5096 | purebeg = xmalloc (10000); |
44117420 KS |
5097 | pure_size = 10000; |
5098 | pure_bytes_used_before_overflow += pure_bytes_used - size; | |
5099 | pure_bytes_used = 0; | |
e5bc14d4 | 5100 | pure_bytes_used_lisp = pure_bytes_used_non_lisp = 0; |
44117420 | 5101 | goto again; |
1f0b3fd2 GM |
5102 | } |
5103 | ||
5104 | ||
852f8cdc | 5105 | /* Print a warning if PURESIZE is too small. */ |
9e713715 GM |
5106 | |
5107 | void | |
971de7fb | 5108 | check_pure_size (void) |
9e713715 GM |
5109 | { |
5110 | if (pure_bytes_used_before_overflow) | |
c2982e87 PE |
5111 | message (("emacs:0:Pure Lisp storage overflow (approx. %"pI"d" |
5112 | " bytes needed)"), | |
5113 | pure_bytes_used + pure_bytes_used_before_overflow); | |
9e713715 GM |
5114 | } |
5115 | ||
5116 | ||
79fd0489 YM |
5117 | /* Find the byte sequence {DATA[0], ..., DATA[NBYTES-1], '\0'} from |
5118 | the non-Lisp data pool of the pure storage, and return its start | |
5119 | address. Return NULL if not found. */ | |
5120 | ||
5121 | static char * | |
d311d28c | 5122 | find_string_data_in_pure (const char *data, ptrdiff_t nbytes) |
79fd0489 | 5123 | { |
14162469 | 5124 | int i; |
d311d28c | 5125 | ptrdiff_t skip, bm_skip[256], last_char_skip, infinity, start, start_max; |
2aff7c53 | 5126 | const unsigned char *p; |
79fd0489 YM |
5127 | char *non_lisp_beg; |
5128 | ||
d311d28c | 5129 | if (pure_bytes_used_non_lisp <= nbytes) |
79fd0489 YM |
5130 | return NULL; |
5131 | ||
5132 | /* Set up the Boyer-Moore table. */ | |
5133 | skip = nbytes + 1; | |
5134 | for (i = 0; i < 256; i++) | |
5135 | bm_skip[i] = skip; | |
5136 | ||
2aff7c53 | 5137 | p = (const unsigned char *) data; |
79fd0489 YM |
5138 | while (--skip > 0) |
5139 | bm_skip[*p++] = skip; | |
5140 | ||
5141 | last_char_skip = bm_skip['\0']; | |
5142 | ||
5143 | non_lisp_beg = purebeg + pure_size - pure_bytes_used_non_lisp; | |
5144 | start_max = pure_bytes_used_non_lisp - (nbytes + 1); | |
5145 | ||
5146 | /* See the comments in the function `boyer_moore' (search.c) for the | |
5147 | use of `infinity'. */ | |
5148 | infinity = pure_bytes_used_non_lisp + 1; | |
5149 | bm_skip['\0'] = infinity; | |
5150 | ||
2aff7c53 | 5151 | p = (const unsigned char *) non_lisp_beg + nbytes; |
79fd0489 YM |
5152 | start = 0; |
5153 | do | |
5154 | { | |
5155 | /* Check the last character (== '\0'). */ | |
5156 | do | |
5157 | { | |
5158 | start += bm_skip[*(p + start)]; | |
5159 | } | |
5160 | while (start <= start_max); | |
5161 | ||
5162 | if (start < infinity) | |
5163 | /* Couldn't find the last character. */ | |
5164 | return NULL; | |
5165 | ||
5166 | /* No less than `infinity' means we could find the last | |
5167 | character at `p[start - infinity]'. */ | |
5168 | start -= infinity; | |
5169 | ||
5170 | /* Check the remaining characters. */ | |
5171 | if (memcmp (data, non_lisp_beg + start, nbytes) == 0) | |
5172 | /* Found. */ | |
5173 | return non_lisp_beg + start; | |
5174 | ||
5175 | start += last_char_skip; | |
5176 | } | |
5177 | while (start <= start_max); | |
5178 | ||
5179 | return NULL; | |
5180 | } | |
5181 | ||
5182 | ||
2e471eb5 GM |
5183 | /* Return a string allocated in pure space. DATA is a buffer holding |
5184 | NCHARS characters, and NBYTES bytes of string data. MULTIBYTE | |
fce31d69 | 5185 | means make the result string multibyte. |
1a4f1e2c | 5186 | |
2e471eb5 GM |
5187 | Must get an error if pure storage is full, since if it cannot hold |
5188 | a large string it may be able to hold conses that point to that | |
5189 | string; then the string is not protected from gc. */ | |
7146af97 JB |
5190 | |
5191 | Lisp_Object | |
14162469 | 5192 | make_pure_string (const char *data, |
fce31d69 | 5193 | ptrdiff_t nchars, ptrdiff_t nbytes, bool multibyte) |
7146af97 | 5194 | { |
2e471eb5 | 5195 | Lisp_Object string; |
98c6f1e3 | 5196 | struct Lisp_String *s = pure_alloc (sizeof *s, Lisp_String); |
90256841 | 5197 | s->data = (unsigned char *) find_string_data_in_pure (data, nbytes); |
79fd0489 YM |
5198 | if (s->data == NULL) |
5199 | { | |
98c6f1e3 | 5200 | s->data = pure_alloc (nbytes + 1, -1); |
72af86bd | 5201 | memcpy (s->data, data, nbytes); |
79fd0489 YM |
5202 | s->data[nbytes] = '\0'; |
5203 | } | |
2e471eb5 GM |
5204 | s->size = nchars; |
5205 | s->size_byte = multibyte ? nbytes : -1; | |
77c7bcb1 | 5206 | s->intervals = NULL; |
2e471eb5 GM |
5207 | XSETSTRING (string, s); |
5208 | return string; | |
7146af97 JB |
5209 | } |
5210 | ||
2a0213a6 DA |
5211 | /* Return a string allocated in pure space. Do not |
5212 | allocate the string data, just point to DATA. */ | |
a56eaaef DN |
5213 | |
5214 | Lisp_Object | |
2a0213a6 | 5215 | make_pure_c_string (const char *data, ptrdiff_t nchars) |
a56eaaef DN |
5216 | { |
5217 | Lisp_Object string; | |
98c6f1e3 | 5218 | struct Lisp_String *s = pure_alloc (sizeof *s, Lisp_String); |
a56eaaef DN |
5219 | s->size = nchars; |
5220 | s->size_byte = -1; | |
323637a2 | 5221 | s->data = (unsigned char *) data; |
77c7bcb1 | 5222 | s->intervals = NULL; |
a56eaaef DN |
5223 | XSETSTRING (string, s); |
5224 | return string; | |
5225 | } | |
2e471eb5 | 5226 | |
e3b83880 SM |
5227 | static Lisp_Object purecopy (Lisp_Object obj); |
5228 | ||
34400008 GM |
5229 | /* Return a cons allocated from pure space. Give it pure copies |
5230 | of CAR as car and CDR as cdr. */ | |
5231 | ||
7146af97 | 5232 | Lisp_Object |
971de7fb | 5233 | pure_cons (Lisp_Object car, Lisp_Object cdr) |
7146af97 | 5234 | { |
98c6f1e3 PE |
5235 | Lisp_Object new; |
5236 | struct Lisp_Cons *p = pure_alloc (sizeof *p, Lisp_Cons); | |
1f0b3fd2 | 5237 | XSETCONS (new, p); |
e3b83880 SM |
5238 | XSETCAR (new, purecopy (car)); |
5239 | XSETCDR (new, purecopy (cdr)); | |
7146af97 JB |
5240 | return new; |
5241 | } | |
5242 | ||
7146af97 | 5243 | |
34400008 GM |
5244 | /* Value is a float object with value NUM allocated from pure space. */ |
5245 | ||
d3d47262 | 5246 | static Lisp_Object |
971de7fb | 5247 | make_pure_float (double num) |
7146af97 | 5248 | { |
98c6f1e3 PE |
5249 | Lisp_Object new; |
5250 | struct Lisp_Float *p = pure_alloc (sizeof *p, Lisp_Float); | |
1f0b3fd2 | 5251 | XSETFLOAT (new, p); |
f601cdf3 | 5252 | XFLOAT_INIT (new, num); |
7146af97 JB |
5253 | return new; |
5254 | } | |
5255 | ||
34400008 GM |
5256 | |
5257 | /* Return a vector with room for LEN Lisp_Objects allocated from | |
5258 | pure space. */ | |
5259 | ||
72cb32cf | 5260 | static Lisp_Object |
d311d28c | 5261 | make_pure_vector (ptrdiff_t len) |
7146af97 | 5262 | { |
1f0b3fd2 | 5263 | Lisp_Object new; |
d06714cb | 5264 | size_t size = header_size + len * word_size; |
98c6f1e3 | 5265 | struct Lisp_Vector *p = pure_alloc (size, Lisp_Vectorlike); |
1f0b3fd2 | 5266 | XSETVECTOR (new, p); |
eab3844f | 5267 | XVECTOR (new)->header.size = len; |
7146af97 JB |
5268 | return new; |
5269 | } | |
5270 | ||
34400008 | 5271 | |
a7ca3326 | 5272 | DEFUN ("purecopy", Fpurecopy, Spurecopy, 1, 1, 0, |
909e3b33 | 5273 | doc: /* Make a copy of object OBJ in pure storage. |
228299fa | 5274 | Recursively copies contents of vectors and cons cells. |
7ee72033 | 5275 | Does not copy symbols. Copies strings without text properties. */) |
5842a27b | 5276 | (register Lisp_Object obj) |
7146af97 | 5277 | { |
265a9e55 | 5278 | if (NILP (Vpurify_flag)) |
7146af97 | 5279 | return obj; |
e3b83880 SM |
5280 | else if (MARKERP (obj) || OVERLAYP (obj) |
5281 | || HASH_TABLE_P (obj) || SYMBOLP (obj)) | |
5282 | /* Can't purify those. */ | |
7146af97 | 5283 | return obj; |
e3b83880 SM |
5284 | else |
5285 | return purecopy (obj); | |
5286 | } | |
5287 | ||
5288 | static Lisp_Object | |
5289 | purecopy (Lisp_Object obj) | |
5290 | { | |
5291 | if (PURE_POINTER_P (XPNTR (obj)) || INTEGERP (obj) || SUBRP (obj)) | |
5292 | return obj; /* Already pure. */ | |
7146af97 | 5293 | |
e9515805 SM |
5294 | if (HASH_TABLE_P (Vpurify_flag)) /* Hash consing. */ |
5295 | { | |
5296 | Lisp_Object tmp = Fgethash (obj, Vpurify_flag, Qnil); | |
5297 | if (!NILP (tmp)) | |
5298 | return tmp; | |
5299 | } | |
5300 | ||
d6dd74bb | 5301 | if (CONSP (obj)) |
e9515805 | 5302 | obj = pure_cons (XCAR (obj), XCDR (obj)); |
d6dd74bb | 5303 | else if (FLOATP (obj)) |
e9515805 | 5304 | obj = make_pure_float (XFLOAT_DATA (obj)); |
d6dd74bb | 5305 | else if (STRINGP (obj)) |
42a5b22f | 5306 | obj = make_pure_string (SSDATA (obj), SCHARS (obj), |
e9515805 SM |
5307 | SBYTES (obj), |
5308 | STRING_MULTIBYTE (obj)); | |
876c194c | 5309 | else if (COMPILEDP (obj) || VECTORP (obj)) |
d6dd74bb KH |
5310 | { |
5311 | register struct Lisp_Vector *vec; | |
d311d28c PE |
5312 | register ptrdiff_t i; |
5313 | ptrdiff_t size; | |
d6dd74bb | 5314 | |
77b37c05 | 5315 | size = ASIZE (obj); |
7d535c68 KH |
5316 | if (size & PSEUDOVECTOR_FLAG) |
5317 | size &= PSEUDOVECTOR_SIZE_MASK; | |
6b61353c | 5318 | vec = XVECTOR (make_pure_vector (size)); |
d6dd74bb | 5319 | for (i = 0; i < size; i++) |
e3b83880 | 5320 | vec->contents[i] = purecopy (AREF (obj, i)); |
876c194c | 5321 | if (COMPILEDP (obj)) |
985773c9 | 5322 | { |
876c194c SM |
5323 | XSETPVECTYPE (vec, PVEC_COMPILED); |
5324 | XSETCOMPILED (obj, vec); | |
985773c9 | 5325 | } |
d6dd74bb KH |
5326 | else |
5327 | XSETVECTOR (obj, vec); | |
7146af97 | 5328 | } |
e3b83880 SM |
5329 | else if (SYMBOLP (obj)) |
5330 | { | |
5331 | if (!XSYMBOL (obj)->pinned) | |
5332 | { /* We can't purify them, but they appear in many pure objects. | |
5333 | Mark them as `pinned' so we know to mark them at every GC cycle. */ | |
5334 | XSYMBOL (obj)->pinned = true; | |
5335 | symbol_block_pinned = symbol_block; | |
5336 | } | |
5337 | return obj; | |
5338 | } | |
e9515805 | 5339 | else |
e3b83880 SM |
5340 | { |
5341 | Lisp_Object args[2]; | |
5342 | args[0] = build_pure_c_string ("Don't know how to purify: %S"); | |
5343 | args[1] = obj; | |
5344 | Fsignal (Qerror, (Fcons (Fformat (2, args), Qnil))); | |
5345 | } | |
e9515805 SM |
5346 | |
5347 | if (HASH_TABLE_P (Vpurify_flag)) /* Hash consing. */ | |
5348 | Fputhash (obj, obj, Vpurify_flag); | |
6bbd7a29 GM |
5349 | |
5350 | return obj; | |
7146af97 | 5351 | } |
2e471eb5 | 5352 | |
34400008 | 5353 | |
7146af97 | 5354 | \f |
34400008 GM |
5355 | /*********************************************************************** |
5356 | Protection from GC | |
5357 | ***********************************************************************/ | |
5358 | ||
2e471eb5 GM |
5359 | /* Put an entry in staticvec, pointing at the variable with address |
5360 | VARADDRESS. */ | |
7146af97 JB |
5361 | |
5362 | void | |
971de7fb | 5363 | staticpro (Lisp_Object *varaddress) |
7146af97 | 5364 | { |
7146af97 | 5365 | if (staticidx >= NSTATICS) |
afb8aa24 | 5366 | fatal ("NSTATICS too small; try increasing and recompiling Emacs."); |
4195afc3 | 5367 | staticvec[staticidx++] = varaddress; |
7146af97 JB |
5368 | } |
5369 | ||
7146af97 | 5370 | \f |
34400008 GM |
5371 | /*********************************************************************** |
5372 | Protection from GC | |
5373 | ***********************************************************************/ | |
1a4f1e2c | 5374 | |
e8197642 RS |
5375 | /* Temporarily prevent garbage collection. */ |
5376 | ||
d311d28c | 5377 | ptrdiff_t |
971de7fb | 5378 | inhibit_garbage_collection (void) |
e8197642 | 5379 | { |
d311d28c | 5380 | ptrdiff_t count = SPECPDL_INDEX (); |
54defd0d | 5381 | |
6349ae4d | 5382 | specbind (Qgc_cons_threshold, make_number (MOST_POSITIVE_FIXNUM)); |
e8197642 RS |
5383 | return count; |
5384 | } | |
5385 | ||
3ab6e069 DA |
5386 | /* Used to avoid possible overflows when |
5387 | converting from C to Lisp integers. */ | |
5388 | ||
b0ab8123 | 5389 | static Lisp_Object |
3ab6e069 DA |
5390 | bounded_number (EMACS_INT number) |
5391 | { | |
5392 | return make_number (min (MOST_POSITIVE_FIXNUM, number)); | |
5393 | } | |
34400008 | 5394 | |
12b3895d TM |
5395 | /* Calculate total bytes of live objects. */ |
5396 | ||
5397 | static size_t | |
5398 | total_bytes_of_live_objects (void) | |
5399 | { | |
5400 | size_t tot = 0; | |
5401 | tot += total_conses * sizeof (struct Lisp_Cons); | |
5402 | tot += total_symbols * sizeof (struct Lisp_Symbol); | |
5403 | tot += total_markers * sizeof (union Lisp_Misc); | |
5404 | tot += total_string_bytes; | |
5405 | tot += total_vector_slots * word_size; | |
5406 | tot += total_floats * sizeof (struct Lisp_Float); | |
5407 | tot += total_intervals * sizeof (struct interval); | |
5408 | tot += total_strings * sizeof (struct Lisp_String); | |
5409 | return tot; | |
5410 | } | |
5411 | ||
fc54bdd5 DA |
5412 | #ifdef HAVE_WINDOW_SYSTEM |
5413 | ||
5ae356d9 DA |
5414 | /* This code has a few issues on MS-Windows, see Bug#15876 and Bug#16140. */ |
5415 | ||
5416 | #if !defined (HAVE_NTGUI) | |
5417 | ||
fc54bdd5 DA |
5418 | /* Remove unmarked font-spec and font-entity objects from ENTRY, which is |
5419 | (DRIVER-TYPE NUM-FRAMES FONT-CACHE-DATA ...), and return changed entry. */ | |
5420 | ||
5421 | static Lisp_Object | |
5422 | compact_font_cache_entry (Lisp_Object entry) | |
5423 | { | |
5424 | Lisp_Object tail, *prev = &entry; | |
5425 | ||
5426 | for (tail = entry; CONSP (tail); tail = XCDR (tail)) | |
5427 | { | |
5428 | bool drop = 0; | |
5429 | Lisp_Object obj = XCAR (tail); | |
5430 | ||
5431 | /* Consider OBJ if it is (font-spec . [font-entity font-entity ...]). */ | |
5432 | if (CONSP (obj) && FONT_SPEC_P (XCAR (obj)) | |
5433 | && !VECTOR_MARKED_P (XFONT_SPEC (XCAR (obj))) | |
5434 | && VECTORP (XCDR (obj))) | |
5435 | { | |
5436 | ptrdiff_t i, size = ASIZE (XCDR (obj)) & ~ARRAY_MARK_FLAG; | |
5437 | ||
5438 | /* If font-spec is not marked, most likely all font-entities | |
5439 | are not marked too. But we must be sure that nothing is | |
5440 | marked within OBJ before we really drop it. */ | |
5441 | for (i = 0; i < size; i++) | |
5442 | if (VECTOR_MARKED_P (XFONT_ENTITY (AREF (XCDR (obj), i)))) | |
5443 | break; | |
5444 | ||
5445 | if (i == size) | |
5446 | drop = 1; | |
5447 | } | |
5448 | if (drop) | |
5449 | *prev = XCDR (tail); | |
5450 | else | |
5451 | prev = xcdr_addr (tail); | |
5452 | } | |
5453 | return entry; | |
5454 | } | |
5455 | ||
5ae356d9 DA |
5456 | #endif /* not HAVE_NTGUI */ |
5457 | ||
fc54bdd5 DA |
5458 | /* Compact font caches on all terminals and mark |
5459 | everything which is still here after compaction. */ | |
5460 | ||
5461 | static void | |
5462 | compact_font_caches (void) | |
5463 | { | |
5464 | struct terminal *t; | |
5465 | ||
5466 | for (t = terminal_list; t; t = t->next_terminal) | |
5467 | { | |
5468 | Lisp_Object cache = TERMINAL_FONT_CACHE (t); | |
5ae356d9 | 5469 | #if !defined (HAVE_NTGUI) |
fc54bdd5 DA |
5470 | if (CONSP (cache)) |
5471 | { | |
5472 | Lisp_Object entry; | |
5473 | ||
5474 | for (entry = XCDR (cache); CONSP (entry); entry = XCDR (entry)) | |
5475 | XSETCAR (entry, compact_font_cache_entry (XCAR (entry))); | |
5476 | } | |
5ae356d9 | 5477 | #endif /* not HAVE_NTGUI */ |
fc54bdd5 DA |
5478 | mark_object (cache); |
5479 | } | |
5480 | } | |
5481 | ||
5482 | #else /* not HAVE_WINDOW_SYSTEM */ | |
5483 | ||
5484 | #define compact_font_caches() (void)(0) | |
5485 | ||
5486 | #endif /* HAVE_WINDOW_SYSTEM */ | |
5487 | ||
5488 | /* Remove (MARKER . DATA) entries with unmarked MARKER | |
5489 | from buffer undo LIST and return changed list. */ | |
5490 | ||
5491 | static Lisp_Object | |
5492 | compact_undo_list (Lisp_Object list) | |
5493 | { | |
5494 | Lisp_Object tail, *prev = &list; | |
5495 | ||
5496 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
5497 | { | |
5498 | if (CONSP (XCAR (tail)) | |
5499 | && MARKERP (XCAR (XCAR (tail))) | |
5500 | && !XMARKER (XCAR (XCAR (tail)))->gcmarkbit) | |
5501 | *prev = XCDR (tail); | |
5502 | else | |
5503 | prev = xcdr_addr (tail); | |
5504 | } | |
5505 | return list; | |
5506 | } | |
5507 | ||
e3b83880 SM |
5508 | static void |
5509 | mark_pinned_symbols (void) | |
5510 | { | |
5511 | struct symbol_block *sblk; | |
5512 | int lim = (symbol_block_pinned == symbol_block | |
5513 | ? symbol_block_index : SYMBOL_BLOCK_SIZE); | |
5514 | ||
5515 | for (sblk = symbol_block_pinned; sblk; sblk = sblk->next) | |
5516 | { | |
5517 | union aligned_Lisp_Symbol *sym = sblk->symbols, *end = sym + lim; | |
5518 | for (; sym < end; ++sym) | |
5519 | if (sym->s.pinned) | |
5520 | mark_object (make_lisp_ptr (&sym->s, Lisp_Symbol)); | |
5521 | ||
5522 | lim = SYMBOL_BLOCK_SIZE; | |
5523 | } | |
5524 | } | |
5525 | ||
a7ca3326 | 5526 | DEFUN ("garbage-collect", Fgarbage_collect, Sgarbage_collect, 0, 0, "", |
7ee72033 | 5527 | doc: /* Reclaim storage for Lisp objects no longer needed. |
e1e37596 RS |
5528 | Garbage collection happens automatically if you cons more than |
5529 | `gc-cons-threshold' bytes of Lisp data since previous garbage collection. | |
5db81e33 SM |
5530 | `garbage-collect' normally returns a list with info on amount of space in use, |
5531 | where each entry has the form (NAME SIZE USED FREE), where: | |
5532 | - NAME is a symbol describing the kind of objects this entry represents, | |
5533 | - SIZE is the number of bytes used by each one, | |
5534 | - USED is the number of those objects that were found live in the heap, | |
5535 | - FREE is the number of those objects that are not live but that Emacs | |
5536 | keeps around for future allocations (maybe because it does not know how | |
5537 | to return them to the OS). | |
e1e37596 | 5538 | However, if there was overflow in pure space, `garbage-collect' |
999dd333 GM |
5539 | returns nil, because real GC can't be done. |
5540 | See Info node `(elisp)Garbage Collection'. */) | |
5842a27b | 5541 | (void) |
7146af97 | 5542 | { |
fce31d69 | 5543 | struct buffer *nextb; |
7146af97 | 5544 | char stack_top_variable; |
f66c7cf8 | 5545 | ptrdiff_t i; |
fce31d69 | 5546 | bool message_p; |
d311d28c | 5547 | ptrdiff_t count = SPECPDL_INDEX (); |
43aac990 | 5548 | struct timespec start; |
fecbd8ff | 5549 | Lisp_Object retval = Qnil; |
12b3895d | 5550 | size_t tot_before = 0; |
2c5bd608 | 5551 | |
3de0effb | 5552 | if (abort_on_gc) |
1088b922 | 5553 | emacs_abort (); |
3de0effb | 5554 | |
9e713715 GM |
5555 | /* Can't GC if pure storage overflowed because we can't determine |
5556 | if something is a pure object or not. */ | |
5557 | if (pure_bytes_used_before_overflow) | |
5558 | return Qnil; | |
5559 | ||
3d80c99f | 5560 | /* Record this function, so it appears on the profiler's backtraces. */ |
2f592f95 | 5561 | record_in_backtrace (Qautomatic_gc, &Qnil, 0); |
3d80c99f | 5562 | |
7e63e0c3 | 5563 | check_cons_list (); |
bbc012e0 | 5564 | |
3c7e66a8 RS |
5565 | /* Don't keep undo information around forever. |
5566 | Do this early on, so it is no problem if the user quits. */ | |
52b852c7 | 5567 | FOR_EACH_BUFFER (nextb) |
9cd47b72 | 5568 | compact_buffer (nextb); |
3c7e66a8 | 5569 | |
6521894d | 5570 | if (profiler_memory_running) |
12b3895d TM |
5571 | tot_before = total_bytes_of_live_objects (); |
5572 | ||
43aac990 | 5573 | start = current_timespec (); |
3c7e66a8 | 5574 | |
58595309 KH |
5575 | /* In case user calls debug_print during GC, |
5576 | don't let that cause a recursive GC. */ | |
5577 | consing_since_gc = 0; | |
5578 | ||
6efc7df7 GM |
5579 | /* Save what's currently displayed in the echo area. */ |
5580 | message_p = push_message (); | |
27e498e6 | 5581 | record_unwind_protect_void (pop_message_unwind); |
41c28a37 | 5582 | |
7146af97 JB |
5583 | /* Save a copy of the contents of the stack, for debugging. */ |
5584 | #if MAX_SAVE_STACK > 0 | |
265a9e55 | 5585 | if (NILP (Vpurify_flag)) |
7146af97 | 5586 | { |
dd3f25f7 | 5587 | char *stack; |
903fe15d | 5588 | ptrdiff_t stack_size; |
dd3f25f7 | 5589 | if (&stack_top_variable < stack_bottom) |
7146af97 | 5590 | { |
dd3f25f7 PE |
5591 | stack = &stack_top_variable; |
5592 | stack_size = stack_bottom - &stack_top_variable; | |
5593 | } | |
5594 | else | |
5595 | { | |
5596 | stack = stack_bottom; | |
5597 | stack_size = &stack_top_variable - stack_bottom; | |
5598 | } | |
5599 | if (stack_size <= MAX_SAVE_STACK) | |
7146af97 | 5600 | { |
dd3f25f7 | 5601 | if (stack_copy_size < stack_size) |
7146af97 | 5602 | { |
38182d90 | 5603 | stack_copy = xrealloc (stack_copy, stack_size); |
dd3f25f7 | 5604 | stack_copy_size = stack_size; |
7146af97 | 5605 | } |
e76119d7 | 5606 | no_sanitize_memcpy (stack_copy, stack, stack_size); |
7146af97 JB |
5607 | } |
5608 | } | |
5609 | #endif /* MAX_SAVE_STACK > 0 */ | |
5610 | ||
299585ee | 5611 | if (garbage_collection_messages) |
691c4285 | 5612 | message1_nolog ("Garbage collecting..."); |
7146af97 | 5613 | |
4d7e6e51 | 5614 | block_input (); |
6e0fca1d | 5615 | |
eec7b73d RS |
5616 | shrink_regexp_cache (); |
5617 | ||
7146af97 JB |
5618 | gc_in_progress = 1; |
5619 | ||
005ca5c7 | 5620 | /* Mark all the special slots that serve as the roots of accessibility. */ |
7146af97 | 5621 | |
c752cfa9 DA |
5622 | mark_buffer (&buffer_defaults); |
5623 | mark_buffer (&buffer_local_symbols); | |
5624 | ||
7146af97 | 5625 | for (i = 0; i < staticidx; i++) |
49723c04 | 5626 | mark_object (*staticvec[i]); |
34400008 | 5627 | |
e3b83880 | 5628 | mark_pinned_symbols (); |
2f592f95 | 5629 | mark_specpdl (); |
6ed8eeff | 5630 | mark_terminals (); |
126f9c02 SM |
5631 | mark_kboards (); |
5632 | ||
5633 | #ifdef USE_GTK | |
a411ac43 | 5634 | xg_mark_data (); |
126f9c02 SM |
5635 | #endif |
5636 | ||
34400008 GM |
5637 | #if (GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS \ |
5638 | || GC_MARK_STACK == GC_MARK_STACK_CHECK_GCPROS) | |
5639 | mark_stack (); | |
5640 | #else | |
acf5f7d3 SM |
5641 | { |
5642 | register struct gcpro *tail; | |
5643 | for (tail = gcprolist; tail; tail = tail->next) | |
5644 | for (i = 0; i < tail->nvars; i++) | |
005ca5c7 | 5645 | mark_object (tail->var[i]); |
acf5f7d3 | 5646 | } |
3e21b6a7 | 5647 | mark_byte_stack (); |
adf2aa61 | 5648 | #endif |
b286858c | 5649 | { |
b286858c | 5650 | struct handler *handler; |
adf2aa61 SM |
5651 | for (handler = handlerlist; handler; handler = handler->next) |
5652 | { | |
5653 | mark_object (handler->tag_or_ch); | |
5654 | mark_object (handler->val); | |
5655 | } | |
b286858c | 5656 | } |
454d7973 KS |
5657 | #ifdef HAVE_WINDOW_SYSTEM |
5658 | mark_fringe_data (); | |
5659 | #endif | |
5660 | ||
74c35a48 SM |
5661 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
5662 | mark_stack (); | |
5663 | #endif | |
5664 | ||
fc54bdd5 DA |
5665 | /* Everything is now marked, except for the data in font caches |
5666 | and undo lists. They're compacted by removing an items which | |
5667 | aren't reachable otherwise. */ | |
5668 | ||
5669 | compact_font_caches (); | |
5670 | ||
52b852c7 | 5671 | FOR_EACH_BUFFER (nextb) |
d17337e5 | 5672 | { |
fc54bdd5 DA |
5673 | if (!EQ (BVAR (nextb, undo_list), Qt)) |
5674 | bset_undo_list (nextb, compact_undo_list (BVAR (nextb, undo_list))); | |
5675 | /* Now that we have stripped the elements that need not be | |
5676 | in the undo_list any more, we can finally mark the list. */ | |
5677 | mark_object (BVAR (nextb, undo_list)); | |
d17337e5 | 5678 | } |
4c315bda | 5679 | |
7146af97 JB |
5680 | gc_sweep (); |
5681 | ||
5682 | /* Clear the mark bits that we set in certain root slots. */ | |
5683 | ||
033a5fa3 | 5684 | unmark_byte_stack (); |
3ef06d12 SM |
5685 | VECTOR_UNMARK (&buffer_defaults); |
5686 | VECTOR_UNMARK (&buffer_local_symbols); | |
7146af97 | 5687 | |
34400008 GM |
5688 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES && 0 |
5689 | dump_zombies (); | |
5690 | #endif | |
5691 | ||
7e63e0c3 | 5692 | check_cons_list (); |
bbc012e0 | 5693 | |
7146af97 JB |
5694 | gc_in_progress = 0; |
5695 | ||
5c747675 DA |
5696 | unblock_input (); |
5697 | ||
7146af97 | 5698 | consing_since_gc = 0; |
0dd6d66d DA |
5699 | if (gc_cons_threshold < GC_DEFAULT_THRESHOLD / 10) |
5700 | gc_cons_threshold = GC_DEFAULT_THRESHOLD / 10; | |
7146af97 | 5701 | |
c0c5c8ae | 5702 | gc_relative_threshold = 0; |
96f077ad SM |
5703 | if (FLOATP (Vgc_cons_percentage)) |
5704 | { /* Set gc_cons_combined_threshold. */ | |
12b3895d | 5705 | double tot = total_bytes_of_live_objects (); |
ae35e756 | 5706 | |
c0c5c8ae | 5707 | tot *= XFLOAT_DATA (Vgc_cons_percentage); |
7216e43b | 5708 | if (0 < tot) |
c0c5c8ae PE |
5709 | { |
5710 | if (tot < TYPE_MAXIMUM (EMACS_INT)) | |
5711 | gc_relative_threshold = tot; | |
5712 | else | |
5713 | gc_relative_threshold = TYPE_MAXIMUM (EMACS_INT); | |
5714 | } | |
96f077ad SM |
5715 | } |
5716 | ||
299585ee RS |
5717 | if (garbage_collection_messages) |
5718 | { | |
6efc7df7 GM |
5719 | if (message_p || minibuf_level > 0) |
5720 | restore_message (); | |
299585ee RS |
5721 | else |
5722 | message1_nolog ("Garbage collecting...done"); | |
5723 | } | |
7146af97 | 5724 | |
98edb5ff | 5725 | unbind_to (count, Qnil); |
fecbd8ff SM |
5726 | { |
5727 | Lisp_Object total[11]; | |
5728 | int total_size = 10; | |
2e471eb5 | 5729 | |
fecbd8ff SM |
5730 | total[0] = list4 (Qconses, make_number (sizeof (struct Lisp_Cons)), |
5731 | bounded_number (total_conses), | |
5732 | bounded_number (total_free_conses)); | |
3ab6e069 | 5733 | |
fecbd8ff SM |
5734 | total[1] = list4 (Qsymbols, make_number (sizeof (struct Lisp_Symbol)), |
5735 | bounded_number (total_symbols), | |
5736 | bounded_number (total_free_symbols)); | |
3ab6e069 | 5737 | |
fecbd8ff SM |
5738 | total[2] = list4 (Qmiscs, make_number (sizeof (union Lisp_Misc)), |
5739 | bounded_number (total_markers), | |
5740 | bounded_number (total_free_markers)); | |
3ab6e069 | 5741 | |
fecbd8ff SM |
5742 | total[3] = list4 (Qstrings, make_number (sizeof (struct Lisp_String)), |
5743 | bounded_number (total_strings), | |
5744 | bounded_number (total_free_strings)); | |
3ab6e069 | 5745 | |
fecbd8ff SM |
5746 | total[4] = list3 (Qstring_bytes, make_number (1), |
5747 | bounded_number (total_string_bytes)); | |
3ab6e069 | 5748 | |
fbe9e0b9 PE |
5749 | total[5] = list3 (Qvectors, |
5750 | make_number (header_size + sizeof (Lisp_Object)), | |
fecbd8ff | 5751 | bounded_number (total_vectors)); |
5b835e1d | 5752 | |
fecbd8ff SM |
5753 | total[6] = list4 (Qvector_slots, make_number (word_size), |
5754 | bounded_number (total_vector_slots), | |
5755 | bounded_number (total_free_vector_slots)); | |
5b835e1d | 5756 | |
fecbd8ff SM |
5757 | total[7] = list4 (Qfloats, make_number (sizeof (struct Lisp_Float)), |
5758 | bounded_number (total_floats), | |
5759 | bounded_number (total_free_floats)); | |
3ab6e069 | 5760 | |
fecbd8ff SM |
5761 | total[8] = list4 (Qintervals, make_number (sizeof (struct interval)), |
5762 | bounded_number (total_intervals), | |
5763 | bounded_number (total_free_intervals)); | |
3ab6e069 | 5764 | |
fecbd8ff SM |
5765 | total[9] = list3 (Qbuffers, make_number (sizeof (struct buffer)), |
5766 | bounded_number (total_buffers)); | |
2e471eb5 | 5767 | |
f8643a6b | 5768 | #ifdef DOUG_LEA_MALLOC |
fecbd8ff SM |
5769 | total_size++; |
5770 | total[10] = list4 (Qheap, make_number (1024), | |
5771 | bounded_number ((mallinfo ().uordblks + 1023) >> 10), | |
5772 | bounded_number ((mallinfo ().fordblks + 1023) >> 10)); | |
f8643a6b | 5773 | #endif |
fecbd8ff SM |
5774 | retval = Flist (total_size, total); |
5775 | } | |
f8643a6b | 5776 | |
34400008 | 5777 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES |
7146af97 | 5778 | { |
34400008 | 5779 | /* Compute average percentage of zombies. */ |
fecbd8ff SM |
5780 | double nlive |
5781 | = (total_conses + total_symbols + total_markers + total_strings | |
5782 | + total_vectors + total_floats + total_intervals + total_buffers); | |
34400008 GM |
5783 | |
5784 | avg_live = (avg_live * ngcs + nlive) / (ngcs + 1); | |
5785 | max_live = max (nlive, max_live); | |
5786 | avg_zombies = (avg_zombies * ngcs + nzombies) / (ngcs + 1); | |
5787 | max_zombies = max (nzombies, max_zombies); | |
5788 | ++ngcs; | |
dbcf001c | 5789 | } |
34400008 | 5790 | #endif |
7146af97 | 5791 | |
9e713715 GM |
5792 | if (!NILP (Vpost_gc_hook)) |
5793 | { | |
d311d28c | 5794 | ptrdiff_t gc_count = inhibit_garbage_collection (); |
9e713715 | 5795 | safe_run_hooks (Qpost_gc_hook); |
ae35e756 | 5796 | unbind_to (gc_count, Qnil); |
9e713715 | 5797 | } |
2c5bd608 DL |
5798 | |
5799 | /* Accumulate statistics. */ | |
2c5bd608 | 5800 | if (FLOATP (Vgc_elapsed)) |
387d4d92 | 5801 | { |
43aac990 | 5802 | struct timespec since_start = timespec_sub (current_timespec (), start); |
387d4d92 | 5803 | Vgc_elapsed = make_float (XFLOAT_DATA (Vgc_elapsed) |
43aac990 | 5804 | + timespectod (since_start)); |
387d4d92 | 5805 | } |
d35af63c | 5806 | |
2c5bd608 DL |
5807 | gcs_done++; |
5808 | ||
12b3895d | 5809 | /* Collect profiling data. */ |
6521894d | 5810 | if (profiler_memory_running) |
12b3895d TM |
5811 | { |
5812 | size_t swept = 0; | |
6521894d SM |
5813 | size_t tot_after = total_bytes_of_live_objects (); |
5814 | if (tot_before > tot_after) | |
5815 | swept = tot_before - tot_after; | |
3d80c99f | 5816 | malloc_probe (swept); |
12b3895d TM |
5817 | } |
5818 | ||
fecbd8ff | 5819 | return retval; |
7146af97 | 5820 | } |
34400008 | 5821 | |
41c28a37 | 5822 | |
3770920e GM |
5823 | /* Mark Lisp objects in glyph matrix MATRIX. Currently the |
5824 | only interesting objects referenced from glyphs are strings. */ | |
41c28a37 GM |
5825 | |
5826 | static void | |
971de7fb | 5827 | mark_glyph_matrix (struct glyph_matrix *matrix) |
41c28a37 GM |
5828 | { |
5829 | struct glyph_row *row = matrix->rows; | |
5830 | struct glyph_row *end = row + matrix->nrows; | |
5831 | ||
2e471eb5 GM |
5832 | for (; row < end; ++row) |
5833 | if (row->enabled_p) | |
5834 | { | |
5835 | int area; | |
5836 | for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area) | |
5837 | { | |
5838 | struct glyph *glyph = row->glyphs[area]; | |
5839 | struct glyph *end_glyph = glyph + row->used[area]; | |
177c0ea7 | 5840 | |
2e471eb5 | 5841 | for (; glyph < end_glyph; ++glyph) |
8e50cc2d | 5842 | if (STRINGP (glyph->object) |
2e471eb5 | 5843 | && !STRING_MARKED_P (XSTRING (glyph->object))) |
49723c04 | 5844 | mark_object (glyph->object); |
2e471eb5 GM |
5845 | } |
5846 | } | |
41c28a37 GM |
5847 | } |
5848 | ||
1a4f1e2c | 5849 | /* Mark reference to a Lisp_Object. |
2e471eb5 GM |
5850 | If the object referred to has not been seen yet, recursively mark |
5851 | all the references contained in it. */ | |
7146af97 | 5852 | |
785cd37f | 5853 | #define LAST_MARKED_SIZE 500 |
d3d47262 | 5854 | static Lisp_Object last_marked[LAST_MARKED_SIZE]; |
244ed907 | 5855 | static int last_marked_index; |
785cd37f | 5856 | |
1342fc6f RS |
5857 | /* For debugging--call abort when we cdr down this many |
5858 | links of a list, in mark_object. In debugging, | |
5859 | the call to abort will hit a breakpoint. | |
5860 | Normally this is zero and the check never goes off. */ | |
903fe15d | 5861 | ptrdiff_t mark_object_loop_halt EXTERNALLY_VISIBLE; |
1342fc6f | 5862 | |
8f11f7ec | 5863 | static void |
971de7fb | 5864 | mark_vectorlike (struct Lisp_Vector *ptr) |
d2029e5b | 5865 | { |
d311d28c PE |
5866 | ptrdiff_t size = ptr->header.size; |
5867 | ptrdiff_t i; | |
d2029e5b | 5868 | |
8f11f7ec | 5869 | eassert (!VECTOR_MARKED_P (ptr)); |
7555c33f | 5870 | VECTOR_MARK (ptr); /* Else mark it. */ |
d2029e5b SM |
5871 | if (size & PSEUDOVECTOR_FLAG) |
5872 | size &= PSEUDOVECTOR_SIZE_MASK; | |
d3d47262 | 5873 | |
d2029e5b SM |
5874 | /* Note that this size is not the memory-footprint size, but only |
5875 | the number of Lisp_Object fields that we should trace. | |
5876 | The distinction is used e.g. by Lisp_Process which places extra | |
7555c33f SM |
5877 | non-Lisp_Object fields at the end of the structure... */ |
5878 | for (i = 0; i < size; i++) /* ...and then mark its elements. */ | |
91f2d272 | 5879 | mark_object (ptr->contents[i]); |
d2029e5b SM |
5880 | } |
5881 | ||
58026347 KH |
5882 | /* Like mark_vectorlike but optimized for char-tables (and |
5883 | sub-char-tables) assuming that the contents are mostly integers or | |
5884 | symbols. */ | |
5885 | ||
5886 | static void | |
971de7fb | 5887 | mark_char_table (struct Lisp_Vector *ptr) |
58026347 | 5888 | { |
b6439961 PE |
5889 | int size = ptr->header.size & PSEUDOVECTOR_SIZE_MASK; |
5890 | int i; | |
58026347 | 5891 | |
8f11f7ec | 5892 | eassert (!VECTOR_MARKED_P (ptr)); |
58026347 KH |
5893 | VECTOR_MARK (ptr); |
5894 | for (i = 0; i < size; i++) | |
5895 | { | |
91f2d272 | 5896 | Lisp_Object val = ptr->contents[i]; |
58026347 | 5897 | |
ef1b0ba7 | 5898 | if (INTEGERP (val) || (SYMBOLP (val) && XSYMBOL (val)->gcmarkbit)) |
58026347 KH |
5899 | continue; |
5900 | if (SUB_CHAR_TABLE_P (val)) | |
5901 | { | |
5902 | if (! VECTOR_MARKED_P (XVECTOR (val))) | |
5903 | mark_char_table (XVECTOR (val)); | |
5904 | } | |
5905 | else | |
5906 | mark_object (val); | |
5907 | } | |
5908 | } | |
5909 | ||
36429c89 DA |
5910 | /* Mark the chain of overlays starting at PTR. */ |
5911 | ||
5912 | static void | |
5913 | mark_overlay (struct Lisp_Overlay *ptr) | |
5914 | { | |
5915 | for (; ptr && !ptr->gcmarkbit; ptr = ptr->next) | |
5916 | { | |
5917 | ptr->gcmarkbit = 1; | |
c644523b DA |
5918 | mark_object (ptr->start); |
5919 | mark_object (ptr->end); | |
5920 | mark_object (ptr->plist); | |
36429c89 DA |
5921 | } |
5922 | } | |
5923 | ||
5924 | /* Mark Lisp_Objects and special pointers in BUFFER. */ | |
cf5c0175 DA |
5925 | |
5926 | static void | |
5927 | mark_buffer (struct buffer *buffer) | |
5928 | { | |
b4fa72f2 DA |
5929 | /* This is handled much like other pseudovectors... */ |
5930 | mark_vectorlike ((struct Lisp_Vector *) buffer); | |
cf5c0175 | 5931 | |
b4fa72f2 | 5932 | /* ...but there are some buffer-specific things. */ |
cf5c0175 | 5933 | |
b4fa72f2 | 5934 | MARK_INTERVAL_TREE (buffer_intervals (buffer)); |
cf5c0175 | 5935 | |
b4fa72f2 DA |
5936 | /* For now, we just don't mark the undo_list. It's done later in |
5937 | a special way just before the sweep phase, and after stripping | |
5938 | some of its elements that are not needed any more. */ | |
cf5c0175 | 5939 | |
b4fa72f2 DA |
5940 | mark_overlay (buffer->overlays_before); |
5941 | mark_overlay (buffer->overlays_after); | |
cf5c0175 | 5942 | |
b4fa72f2 DA |
5943 | /* If this is an indirect buffer, mark its base buffer. */ |
5944 | if (buffer->base_buffer && !VECTOR_MARKED_P (buffer->base_buffer)) | |
5945 | mark_buffer (buffer->base_buffer); | |
cf5c0175 DA |
5946 | } |
5947 | ||
fc54bdd5 DA |
5948 | /* Mark Lisp faces in the face cache C. */ |
5949 | ||
5950 | static void | |
5951 | mark_face_cache (struct face_cache *c) | |
5952 | { | |
5953 | if (c) | |
5954 | { | |
5955 | int i, j; | |
5956 | for (i = 0; i < c->used; ++i) | |
5957 | { | |
5958 | struct face *face = FACE_FROM_ID (c->f, i); | |
5959 | ||
5960 | if (face) | |
5961 | { | |
5962 | if (face->font && !VECTOR_MARKED_P (face->font)) | |
5963 | mark_vectorlike ((struct Lisp_Vector *) face->font); | |
5964 | ||
5965 | for (j = 0; j < LFACE_VECTOR_SIZE; ++j) | |
5966 | mark_object (face->lface[j]); | |
5967 | } | |
5968 | } | |
5969 | } | |
5970 | } | |
5971 | ||
d59a1afb | 5972 | /* Remove killed buffers or items whose car is a killed buffer from |
e99f70c8 | 5973 | LIST, and mark other items. Return changed LIST, which is marked. */ |
d73e321c | 5974 | |
5779a1dc | 5975 | static Lisp_Object |
d59a1afb | 5976 | mark_discard_killed_buffers (Lisp_Object list) |
d73e321c | 5977 | { |
d59a1afb | 5978 | Lisp_Object tail, *prev = &list; |
d73e321c | 5979 | |
d59a1afb DA |
5980 | for (tail = list; CONSP (tail) && !CONS_MARKED_P (XCONS (tail)); |
5981 | tail = XCDR (tail)) | |
d73e321c | 5982 | { |
5779a1dc | 5983 | Lisp_Object tem = XCAR (tail); |
d73e321c DA |
5984 | if (CONSP (tem)) |
5985 | tem = XCAR (tem); | |
5986 | if (BUFFERP (tem) && !BUFFER_LIVE_P (XBUFFER (tem))) | |
5779a1dc | 5987 | *prev = XCDR (tail); |
d73e321c | 5988 | else |
d59a1afb DA |
5989 | { |
5990 | CONS_MARK (XCONS (tail)); | |
5991 | mark_object (XCAR (tail)); | |
84575e67 | 5992 | prev = xcdr_addr (tail); |
d59a1afb | 5993 | } |
d73e321c | 5994 | } |
e99f70c8 | 5995 | mark_object (tail); |
d73e321c DA |
5996 | return list; |
5997 | } | |
5998 | ||
cf5c0175 DA |
5999 | /* Determine type of generic Lisp_Object and mark it accordingly. */ |
6000 | ||
41c28a37 | 6001 | void |
971de7fb | 6002 | mark_object (Lisp_Object arg) |
7146af97 | 6003 | { |
49723c04 | 6004 | register Lisp_Object obj = arg; |
4f5c1376 GM |
6005 | #ifdef GC_CHECK_MARKED_OBJECTS |
6006 | void *po; | |
6007 | struct mem_node *m; | |
6008 | #endif | |
903fe15d | 6009 | ptrdiff_t cdr_count = 0; |
7146af97 | 6010 | |
9149e743 | 6011 | loop: |
7146af97 | 6012 | |
1f0b3fd2 | 6013 | if (PURE_POINTER_P (XPNTR (obj))) |
7146af97 JB |
6014 | return; |
6015 | ||
49723c04 | 6016 | last_marked[last_marked_index++] = obj; |
785cd37f RS |
6017 | if (last_marked_index == LAST_MARKED_SIZE) |
6018 | last_marked_index = 0; | |
6019 | ||
4f5c1376 GM |
6020 | /* Perform some sanity checks on the objects marked here. Abort if |
6021 | we encounter an object we know is bogus. This increases GC time | |
6022 | by ~80%, and requires compilation with GC_MARK_STACK != 0. */ | |
6023 | #ifdef GC_CHECK_MARKED_OBJECTS | |
6024 | ||
6025 | po = (void *) XPNTR (obj); | |
6026 | ||
6027 | /* Check that the object pointed to by PO is known to be a Lisp | |
6028 | structure allocated from the heap. */ | |
6029 | #define CHECK_ALLOCATED() \ | |
6030 | do { \ | |
6031 | m = mem_find (po); \ | |
6032 | if (m == MEM_NIL) \ | |
1088b922 | 6033 | emacs_abort (); \ |
4f5c1376 GM |
6034 | } while (0) |
6035 | ||
6036 | /* Check that the object pointed to by PO is live, using predicate | |
6037 | function LIVEP. */ | |
6038 | #define CHECK_LIVE(LIVEP) \ | |
6039 | do { \ | |
6040 | if (!LIVEP (m, po)) \ | |
1088b922 | 6041 | emacs_abort (); \ |
4f5c1376 GM |
6042 | } while (0) |
6043 | ||
6044 | /* Check both of the above conditions. */ | |
6045 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) \ | |
6046 | do { \ | |
6047 | CHECK_ALLOCATED (); \ | |
6048 | CHECK_LIVE (LIVEP); \ | |
6049 | } while (0) \ | |
177c0ea7 | 6050 | |
4f5c1376 | 6051 | #else /* not GC_CHECK_MARKED_OBJECTS */ |
177c0ea7 | 6052 | |
4f5c1376 GM |
6053 | #define CHECK_LIVE(LIVEP) (void) 0 |
6054 | #define CHECK_ALLOCATED_AND_LIVE(LIVEP) (void) 0 | |
177c0ea7 | 6055 | |
4f5c1376 GM |
6056 | #endif /* not GC_CHECK_MARKED_OBJECTS */ |
6057 | ||
7393bcbb | 6058 | switch (XTYPE (obj)) |
7146af97 JB |
6059 | { |
6060 | case Lisp_String: | |
6061 | { | |
6062 | register struct Lisp_String *ptr = XSTRING (obj); | |
8f11f7ec SM |
6063 | if (STRING_MARKED_P (ptr)) |
6064 | break; | |
4f5c1376 | 6065 | CHECK_ALLOCATED_AND_LIVE (live_string_p); |
2e471eb5 | 6066 | MARK_STRING (ptr); |
7555c33f | 6067 | MARK_INTERVAL_TREE (ptr->intervals); |
361b097f | 6068 | #ifdef GC_CHECK_STRING_BYTES |
676a7251 | 6069 | /* Check that the string size recorded in the string is the |
7555c33f | 6070 | same as the one recorded in the sdata structure. */ |
e499d0ee | 6071 | string_bytes (ptr); |
361b097f | 6072 | #endif /* GC_CHECK_STRING_BYTES */ |
7146af97 JB |
6073 | } |
6074 | break; | |
6075 | ||
76437631 | 6076 | case Lisp_Vectorlike: |
cf5c0175 DA |
6077 | { |
6078 | register struct Lisp_Vector *ptr = XVECTOR (obj); | |
6079 | register ptrdiff_t pvectype; | |
6080 | ||
6081 | if (VECTOR_MARKED_P (ptr)) | |
6082 | break; | |
6083 | ||
4f5c1376 | 6084 | #ifdef GC_CHECK_MARKED_OBJECTS |
cf5c0175 | 6085 | m = mem_find (po); |
c752cfa9 | 6086 | if (m == MEM_NIL && !SUBRP (obj)) |
1088b922 | 6087 | emacs_abort (); |
4f5c1376 | 6088 | #endif /* GC_CHECK_MARKED_OBJECTS */ |
177c0ea7 | 6089 | |
cf5c0175 | 6090 | if (ptr->header.size & PSEUDOVECTOR_FLAG) |
ee28be33 | 6091 | pvectype = ((ptr->header.size & PVEC_TYPE_MASK) |
914adc42 | 6092 | >> PSEUDOVECTOR_AREA_BITS); |
cf5c0175 | 6093 | else |
6aea7528 | 6094 | pvectype = PVEC_NORMAL_VECTOR; |
cf5c0175 | 6095 | |
cf5c0175 DA |
6096 | if (pvectype != PVEC_SUBR && pvectype != PVEC_BUFFER) |
6097 | CHECK_LIVE (live_vector_p); | |
169ee243 | 6098 | |
ee28be33 | 6099 | switch (pvectype) |
cf5c0175 | 6100 | { |
ee28be33 | 6101 | case PVEC_BUFFER: |
cf5c0175 | 6102 | #ifdef GC_CHECK_MARKED_OBJECTS |
c752cfa9 DA |
6103 | { |
6104 | struct buffer *b; | |
6105 | FOR_EACH_BUFFER (b) | |
6106 | if (b == po) | |
6107 | break; | |
6108 | if (b == NULL) | |
6109 | emacs_abort (); | |
6110 | } | |
cf5c0175 DA |
6111 | #endif /* GC_CHECK_MARKED_OBJECTS */ |
6112 | mark_buffer ((struct buffer *) ptr); | |
ee28be33 SM |
6113 | break; |
6114 | ||
6115 | case PVEC_COMPILED: | |
6116 | { /* We could treat this just like a vector, but it is better | |
6117 | to save the COMPILED_CONSTANTS element for last and avoid | |
6118 | recursion there. */ | |
6119 | int size = ptr->header.size & PSEUDOVECTOR_SIZE_MASK; | |
6120 | int i; | |
6121 | ||
6122 | VECTOR_MARK (ptr); | |
6123 | for (i = 0; i < size; i++) | |
6124 | if (i != COMPILED_CONSTANTS) | |
91f2d272 | 6125 | mark_object (ptr->contents[i]); |
ee28be33 SM |
6126 | if (size > COMPILED_CONSTANTS) |
6127 | { | |
91f2d272 | 6128 | obj = ptr->contents[COMPILED_CONSTANTS]; |
ee28be33 SM |
6129 | goto loop; |
6130 | } | |
6131 | } | |
6132 | break; | |
cf5c0175 | 6133 | |
ee28be33 | 6134 | case PVEC_FRAME: |
df24a230 DA |
6135 | { |
6136 | struct frame *f = (struct frame *) ptr; | |
6137 | ||
6138 | mark_vectorlike (ptr); | |
6139 | mark_face_cache (f->face_cache); | |
6140 | #ifdef HAVE_WINDOW_SYSTEM | |
6141 | if (FRAME_WINDOW_P (f) && FRAME_X_OUTPUT (f)) | |
6142 | { | |
6143 | struct font *font = FRAME_FONT (f); | |
6144 | ||
6145 | if (font && !VECTOR_MARKED_P (font)) | |
6146 | mark_vectorlike ((struct Lisp_Vector *) font); | |
6147 | } | |
6148 | #endif | |
6149 | } | |
ee28be33 | 6150 | break; |
cf5c0175 | 6151 | |
ee28be33 SM |
6152 | case PVEC_WINDOW: |
6153 | { | |
6154 | struct window *w = (struct window *) ptr; | |
5779a1dc | 6155 | |
0699fc18 | 6156 | mark_vectorlike (ptr); |
e99f70c8 | 6157 | |
e74aeda8 | 6158 | /* Mark glyph matrices, if any. Marking window |
0699fc18 DA |
6159 | matrices is sufficient because frame matrices |
6160 | use the same glyph memory. */ | |
e74aeda8 | 6161 | if (w->current_matrix) |
ee28be33 | 6162 | { |
0699fc18 DA |
6163 | mark_glyph_matrix (w->current_matrix); |
6164 | mark_glyph_matrix (w->desired_matrix); | |
ee28be33 | 6165 | } |
e99f70c8 SM |
6166 | |
6167 | /* Filter out killed buffers from both buffer lists | |
6168 | in attempt to help GC to reclaim killed buffers faster. | |
6169 | We can do it elsewhere for live windows, but this is the | |
6170 | best place to do it for dead windows. */ | |
6171 | wset_prev_buffers | |
6172 | (w, mark_discard_killed_buffers (w->prev_buffers)); | |
6173 | wset_next_buffers | |
6174 | (w, mark_discard_killed_buffers (w->next_buffers)); | |
ee28be33 SM |
6175 | } |
6176 | break; | |
cf5c0175 | 6177 | |
ee28be33 SM |
6178 | case PVEC_HASH_TABLE: |
6179 | { | |
6180 | struct Lisp_Hash_Table *h = (struct Lisp_Hash_Table *) ptr; | |
cf5c0175 | 6181 | |
ee28be33 | 6182 | mark_vectorlike (ptr); |
b7432bb2 SM |
6183 | mark_object (h->test.name); |
6184 | mark_object (h->test.user_hash_function); | |
6185 | mark_object (h->test.user_cmp_function); | |
ee28be33 SM |
6186 | /* If hash table is not weak, mark all keys and values. |
6187 | For weak tables, mark only the vector. */ | |
6188 | if (NILP (h->weak)) | |
6189 | mark_object (h->key_and_value); | |
6190 | else | |
6191 | VECTOR_MARK (XVECTOR (h->key_and_value)); | |
6192 | } | |
6193 | break; | |
cf5c0175 | 6194 | |
ee28be33 SM |
6195 | case PVEC_CHAR_TABLE: |
6196 | mark_char_table (ptr); | |
6197 | break; | |
cf5c0175 | 6198 | |
ee28be33 SM |
6199 | case PVEC_BOOL_VECTOR: |
6200 | /* No Lisp_Objects to mark in a bool vector. */ | |
6201 | VECTOR_MARK (ptr); | |
6202 | break; | |
cf5c0175 | 6203 | |
ee28be33 SM |
6204 | case PVEC_SUBR: |
6205 | break; | |
cf5c0175 | 6206 | |
ee28be33 | 6207 | case PVEC_FREE: |
1088b922 | 6208 | emacs_abort (); |
cf5c0175 | 6209 | |
ee28be33 SM |
6210 | default: |
6211 | mark_vectorlike (ptr); | |
6212 | } | |
cf5c0175 | 6213 | } |
169ee243 | 6214 | break; |
7146af97 | 6215 | |
7146af97 JB |
6216 | case Lisp_Symbol: |
6217 | { | |
c70bbf06 | 6218 | register struct Lisp_Symbol *ptr = XSYMBOL (obj); |
7146af97 JB |
6219 | struct Lisp_Symbol *ptrx; |
6220 | ||
8f11f7ec SM |
6221 | if (ptr->gcmarkbit) |
6222 | break; | |
4f5c1376 | 6223 | CHECK_ALLOCATED_AND_LIVE (live_symbol_p); |
2336fe58 | 6224 | ptr->gcmarkbit = 1; |
e3f04a4a DC |
6225 | /* Attempt to catch bogus objects. */ |
6226 | eassert (valid_lisp_object_p (ptr->function) >= 1); | |
c644523b DA |
6227 | mark_object (ptr->function); |
6228 | mark_object (ptr->plist); | |
ce5b453a SM |
6229 | switch (ptr->redirect) |
6230 | { | |
6231 | case SYMBOL_PLAINVAL: mark_object (SYMBOL_VAL (ptr)); break; | |
6232 | case SYMBOL_VARALIAS: | |
6233 | { | |
6234 | Lisp_Object tem; | |
6235 | XSETSYMBOL (tem, SYMBOL_ALIAS (ptr)); | |
6236 | mark_object (tem); | |
6237 | break; | |
6238 | } | |
6239 | case SYMBOL_LOCALIZED: | |
6240 | { | |
6241 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (ptr); | |
d73e321c DA |
6242 | Lisp_Object where = blv->where; |
6243 | /* If the value is set up for a killed buffer or deleted | |
6244 | frame, restore it's global binding. If the value is | |
6245 | forwarded to a C variable, either it's not a Lisp_Object | |
6246 | var, or it's staticpro'd already. */ | |
6247 | if ((BUFFERP (where) && !BUFFER_LIVE_P (XBUFFER (where))) | |
6248 | || (FRAMEP (where) && !FRAME_LIVE_P (XFRAME (where)))) | |
6249 | swap_in_global_binding (ptr); | |
ce5b453a SM |
6250 | mark_object (blv->where); |
6251 | mark_object (blv->valcell); | |
6252 | mark_object (blv->defcell); | |
6253 | break; | |
6254 | } | |
6255 | case SYMBOL_FORWARDED: | |
6256 | /* If the value is forwarded to a buffer or keyboard field, | |
6257 | these are marked when we see the corresponding object. | |
6258 | And if it's forwarded to a C variable, either it's not | |
6259 | a Lisp_Object var, or it's staticpro'd already. */ | |
6260 | break; | |
1088b922 | 6261 | default: emacs_abort (); |
ce5b453a | 6262 | } |
c644523b DA |
6263 | if (!PURE_POINTER_P (XSTRING (ptr->name))) |
6264 | MARK_STRING (XSTRING (ptr->name)); | |
0c94c8d6 | 6265 | MARK_INTERVAL_TREE (string_intervals (ptr->name)); |
177c0ea7 | 6266 | |
7146af97 JB |
6267 | ptr = ptr->next; |
6268 | if (ptr) | |
6269 | { | |
7555c33f | 6270 | ptrx = ptr; /* Use of ptrx avoids compiler bug on Sun. */ |
7146af97 | 6271 | XSETSYMBOL (obj, ptrx); |
49723c04 | 6272 | goto loop; |
7146af97 JB |
6273 | } |
6274 | } | |
6275 | break; | |
6276 | ||
a0a38eb7 | 6277 | case Lisp_Misc: |
4f5c1376 | 6278 | CHECK_ALLOCATED_AND_LIVE (live_misc_p); |
b766f870 | 6279 | |
7555c33f SM |
6280 | if (XMISCANY (obj)->gcmarkbit) |
6281 | break; | |
6282 | ||
6283 | switch (XMISCTYPE (obj)) | |
a0a38eb7 | 6284 | { |
7555c33f SM |
6285 | case Lisp_Misc_Marker: |
6286 | /* DO NOT mark thru the marker's chain. | |
6287 | The buffer's markers chain does not preserve markers from gc; | |
6288 | instead, markers are removed from the chain when freed by gc. */ | |
36429c89 | 6289 | XMISCANY (obj)->gcmarkbit = 1; |
7555c33f | 6290 | break; |
465edf35 | 6291 | |
7555c33f SM |
6292 | case Lisp_Misc_Save_Value: |
6293 | XMISCANY (obj)->gcmarkbit = 1; | |
7555c33f | 6294 | { |
7b1123d8 PE |
6295 | struct Lisp_Save_Value *ptr = XSAVE_VALUE (obj); |
6296 | /* If `save_type' is zero, `data[0].pointer' is the address | |
73ebd38f DA |
6297 | of a memory area containing `data[1].integer' potential |
6298 | Lisp_Objects. */ | |
7b1123d8 | 6299 | if (GC_MARK_STACK && ptr->save_type == SAVE_TYPE_MEMORY) |
7555c33f | 6300 | { |
c50cf2ea | 6301 | Lisp_Object *p = ptr->data[0].pointer; |
7555c33f | 6302 | ptrdiff_t nelt; |
73ebd38f | 6303 | for (nelt = ptr->data[1].integer; nelt > 0; nelt--, p++) |
7555c33f SM |
6304 | mark_maybe_object (*p); |
6305 | } | |
73ebd38f | 6306 | else |
73ebd38f DA |
6307 | { |
6308 | /* Find Lisp_Objects in `data[N]' slots and mark them. */ | |
7b1123d8 PE |
6309 | int i; |
6310 | for (i = 0; i < SAVE_VALUE_SLOTS; i++) | |
6311 | if (save_type (ptr, i) == SAVE_OBJECT) | |
6312 | mark_object (ptr->data[i].object); | |
73ebd38f | 6313 | } |
7555c33f | 6314 | } |
7555c33f SM |
6315 | break; |
6316 | ||
6317 | case Lisp_Misc_Overlay: | |
6318 | mark_overlay (XOVERLAY (obj)); | |
6319 | break; | |
6320 | ||
6321 | default: | |
1088b922 | 6322 | emacs_abort (); |
a0a38eb7 | 6323 | } |
7146af97 JB |
6324 | break; |
6325 | ||
6326 | case Lisp_Cons: | |
7146af97 JB |
6327 | { |
6328 | register struct Lisp_Cons *ptr = XCONS (obj); | |
8f11f7ec SM |
6329 | if (CONS_MARKED_P (ptr)) |
6330 | break; | |
4f5c1376 | 6331 | CHECK_ALLOCATED_AND_LIVE (live_cons_p); |
08b7c2cb | 6332 | CONS_MARK (ptr); |
c54ca951 | 6333 | /* If the cdr is nil, avoid recursion for the car. */ |
c644523b | 6334 | if (EQ (ptr->u.cdr, Qnil)) |
c54ca951 | 6335 | { |
c644523b | 6336 | obj = ptr->car; |
1342fc6f | 6337 | cdr_count = 0; |
c54ca951 RS |
6338 | goto loop; |
6339 | } | |
c644523b DA |
6340 | mark_object (ptr->car); |
6341 | obj = ptr->u.cdr; | |
1342fc6f RS |
6342 | cdr_count++; |
6343 | if (cdr_count == mark_object_loop_halt) | |
1088b922 | 6344 | emacs_abort (); |
7146af97 JB |
6345 | goto loop; |
6346 | } | |
6347 | ||
7146af97 | 6348 | case Lisp_Float: |
4f5c1376 | 6349 | CHECK_ALLOCATED_AND_LIVE (live_float_p); |
ab6780cd | 6350 | FLOAT_MARK (XFLOAT (obj)); |
7146af97 | 6351 | break; |
7146af97 | 6352 | |
2de9f71c | 6353 | case_Lisp_Int: |
7146af97 JB |
6354 | break; |
6355 | ||
6356 | default: | |
1088b922 | 6357 | emacs_abort (); |
7146af97 | 6358 | } |
4f5c1376 GM |
6359 | |
6360 | #undef CHECK_LIVE | |
6361 | #undef CHECK_ALLOCATED | |
6362 | #undef CHECK_ALLOCATED_AND_LIVE | |
7146af97 | 6363 | } |
4a729fd8 | 6364 | /* Mark the Lisp pointers in the terminal objects. |
0ba2624f | 6365 | Called by Fgarbage_collect. */ |
4a729fd8 | 6366 | |
4a729fd8 SM |
6367 | static void |
6368 | mark_terminals (void) | |
6369 | { | |
6370 | struct terminal *t; | |
6371 | for (t = terminal_list; t; t = t->next_terminal) | |
6372 | { | |
6373 | eassert (t->name != NULL); | |
354884c4 | 6374 | #ifdef HAVE_WINDOW_SYSTEM |
96ad0af7 YM |
6375 | /* If a terminal object is reachable from a stacpro'ed object, |
6376 | it might have been marked already. Make sure the image cache | |
6377 | gets marked. */ | |
6378 | mark_image_cache (t->image_cache); | |
354884c4 | 6379 | #endif /* HAVE_WINDOW_SYSTEM */ |
96ad0af7 YM |
6380 | if (!VECTOR_MARKED_P (t)) |
6381 | mark_vectorlike ((struct Lisp_Vector *)t); | |
4a729fd8 SM |
6382 | } |
6383 | } | |
6384 | ||
6385 | ||
084b1a0c | 6386 | |
41c28a37 GM |
6387 | /* Value is non-zero if OBJ will survive the current GC because it's |
6388 | either marked or does not need to be marked to survive. */ | |
6389 | ||
fce31d69 | 6390 | bool |
971de7fb | 6391 | survives_gc_p (Lisp_Object obj) |
41c28a37 | 6392 | { |
fce31d69 | 6393 | bool survives_p; |
177c0ea7 | 6394 | |
8e50cc2d | 6395 | switch (XTYPE (obj)) |
41c28a37 | 6396 | { |
2de9f71c | 6397 | case_Lisp_Int: |
41c28a37 GM |
6398 | survives_p = 1; |
6399 | break; | |
6400 | ||
6401 | case Lisp_Symbol: | |
2336fe58 | 6402 | survives_p = XSYMBOL (obj)->gcmarkbit; |
41c28a37 GM |
6403 | break; |
6404 | ||
6405 | case Lisp_Misc: | |
67ee9f6e | 6406 | survives_p = XMISCANY (obj)->gcmarkbit; |
41c28a37 GM |
6407 | break; |
6408 | ||
6409 | case Lisp_String: | |
08b7c2cb | 6410 | survives_p = STRING_MARKED_P (XSTRING (obj)); |
41c28a37 GM |
6411 | break; |
6412 | ||
6413 | case Lisp_Vectorlike: | |
8e50cc2d | 6414 | survives_p = SUBRP (obj) || VECTOR_MARKED_P (XVECTOR (obj)); |
41c28a37 GM |
6415 | break; |
6416 | ||
6417 | case Lisp_Cons: | |
08b7c2cb | 6418 | survives_p = CONS_MARKED_P (XCONS (obj)); |
41c28a37 GM |
6419 | break; |
6420 | ||
41c28a37 | 6421 | case Lisp_Float: |
ab6780cd | 6422 | survives_p = FLOAT_MARKED_P (XFLOAT (obj)); |
41c28a37 | 6423 | break; |
41c28a37 GM |
6424 | |
6425 | default: | |
1088b922 | 6426 | emacs_abort (); |
41c28a37 GM |
6427 | } |
6428 | ||
34400008 | 6429 | return survives_p || PURE_POINTER_P ((void *) XPNTR (obj)); |
41c28a37 GM |
6430 | } |
6431 | ||
6432 | ||
7146af97 | 6433 | \f |
7146af97 | 6434 | |
b029599f | 6435 | NO_INLINE /* For better stack traces */ |
7146af97 | 6436 | static void |
b029599f | 6437 | sweep_conses (void) |
7146af97 | 6438 | { |
9c23779a | 6439 | struct cons_block *cblk; |
b029599f | 6440 | struct cons_block **cprev = &cons_block; |
9c23779a | 6441 | int lim = cons_block_index; |
b029599f | 6442 | EMACS_INT num_free = 0, num_used = 0; |
7146af97 | 6443 | |
b029599f | 6444 | cons_free_list = 0; |
177c0ea7 | 6445 | |
b029599f DC |
6446 | for (cblk = cons_block; cblk; cblk = *cprev) |
6447 | { | |
9c23779a | 6448 | int i = 0; |
b029599f | 6449 | int this_free = 0; |
9c23779a | 6450 | int ilim = (lim + BITS_PER_BITS_WORD - 1) / BITS_PER_BITS_WORD; |
3ae2e3a3 | 6451 | |
b029599f DC |
6452 | /* Scan the mark bits an int at a time. */ |
6453 | for (i = 0; i < ilim; i++) | |
6454 | { | |
9c23779a | 6455 | if (cblk->gcmarkbits[i] == BITS_WORD_MAX) |
b029599f DC |
6456 | { |
6457 | /* Fast path - all cons cells for this int are marked. */ | |
6458 | cblk->gcmarkbits[i] = 0; | |
9c23779a | 6459 | num_used += BITS_PER_BITS_WORD; |
b029599f DC |
6460 | } |
6461 | else | |
6462 | { | |
6463 | /* Some cons cells for this int are not marked. | |
6464 | Find which ones, and free them. */ | |
6465 | int start, pos, stop; | |
6466 | ||
9c23779a | 6467 | start = i * BITS_PER_BITS_WORD; |
b029599f | 6468 | stop = lim - start; |
9c23779a PE |
6469 | if (stop > BITS_PER_BITS_WORD) |
6470 | stop = BITS_PER_BITS_WORD; | |
b029599f DC |
6471 | stop += start; |
6472 | ||
6473 | for (pos = start; pos < stop; pos++) | |
6474 | { | |
6475 | if (!CONS_MARKED_P (&cblk->conses[pos])) | |
6476 | { | |
6477 | this_free++; | |
6478 | cblk->conses[pos].u.chain = cons_free_list; | |
6479 | cons_free_list = &cblk->conses[pos]; | |
34400008 | 6480 | #if GC_MARK_STACK |
b029599f | 6481 | cons_free_list->car = Vdead; |
34400008 | 6482 | #endif |
b029599f DC |
6483 | } |
6484 | else | |
6485 | { | |
6486 | num_used++; | |
6487 | CONS_UNMARK (&cblk->conses[pos]); | |
6488 | } | |
6489 | } | |
6490 | } | |
6491 | } | |
7146af97 | 6492 | |
b029599f DC |
6493 | lim = CONS_BLOCK_SIZE; |
6494 | /* If this block contains only free conses and we have already | |
6495 | seen more than two blocks worth of free conses then deallocate | |
6496 | this block. */ | |
6497 | if (this_free == CONS_BLOCK_SIZE && num_free > CONS_BLOCK_SIZE) | |
6498 | { | |
6499 | *cprev = cblk->next; | |
6500 | /* Unhook from the free list. */ | |
6501 | cons_free_list = cblk->conses[0].u.chain; | |
6502 | lisp_align_free (cblk); | |
6503 | } | |
6504 | else | |
6505 | { | |
6506 | num_free += this_free; | |
6507 | cprev = &cblk->next; | |
6508 | } | |
6509 | } | |
6510 | total_conses = num_used; | |
6511 | total_free_conses = num_free; | |
6512 | } | |
7146af97 | 6513 | |
b029599f DC |
6514 | NO_INLINE /* For better stack traces */ |
6515 | static void | |
6516 | sweep_floats (void) | |
6517 | { | |
6518 | register struct float_block *fblk; | |
6519 | struct float_block **fprev = &float_block; | |
6520 | register int lim = float_block_index; | |
6521 | EMACS_INT num_free = 0, num_used = 0; | |
177c0ea7 | 6522 | |
b029599f | 6523 | float_free_list = 0; |
7146af97 | 6524 | |
b029599f DC |
6525 | for (fblk = float_block; fblk; fblk = *fprev) |
6526 | { | |
6527 | register int i; | |
6528 | int this_free = 0; | |
6529 | for (i = 0; i < lim; i++) | |
6530 | if (!FLOAT_MARKED_P (&fblk->floats[i])) | |
6531 | { | |
6532 | this_free++; | |
6533 | fblk->floats[i].u.chain = float_free_list; | |
6534 | float_free_list = &fblk->floats[i]; | |
6535 | } | |
6536 | else | |
6537 | { | |
6538 | num_used++; | |
6539 | FLOAT_UNMARK (&fblk->floats[i]); | |
6540 | } | |
6541 | lim = FLOAT_BLOCK_SIZE; | |
6542 | /* If this block contains only free floats and we have already | |
6543 | seen more than two blocks worth of free floats then deallocate | |
6544 | this block. */ | |
6545 | if (this_free == FLOAT_BLOCK_SIZE && num_free > FLOAT_BLOCK_SIZE) | |
6546 | { | |
6547 | *fprev = fblk->next; | |
6548 | /* Unhook from the free list. */ | |
6549 | float_free_list = fblk->floats[0].u.chain; | |
6550 | lisp_align_free (fblk); | |
6551 | } | |
6552 | else | |
6553 | { | |
6554 | num_free += this_free; | |
6555 | fprev = &fblk->next; | |
6556 | } | |
6557 | } | |
6558 | total_floats = num_used; | |
6559 | total_free_floats = num_free; | |
6560 | } | |
d5e35230 | 6561 | |
b029599f DC |
6562 | NO_INLINE /* For better stack traces */ |
6563 | static void | |
6564 | sweep_intervals (void) | |
6565 | { | |
6566 | register struct interval_block *iblk; | |
6567 | struct interval_block **iprev = &interval_block; | |
6568 | register int lim = interval_block_index; | |
6569 | EMACS_INT num_free = 0, num_used = 0; | |
d5e35230 | 6570 | |
b029599f | 6571 | interval_free_list = 0; |
d5e35230 | 6572 | |
b029599f DC |
6573 | for (iblk = interval_block; iblk; iblk = *iprev) |
6574 | { | |
6575 | register int i; | |
6576 | int this_free = 0; | |
d5e35230 | 6577 | |
b029599f DC |
6578 | for (i = 0; i < lim; i++) |
6579 | { | |
6580 | if (!iblk->intervals[i].gcmarkbit) | |
6581 | { | |
6582 | set_interval_parent (&iblk->intervals[i], interval_free_list); | |
6583 | interval_free_list = &iblk->intervals[i]; | |
6584 | this_free++; | |
6585 | } | |
6586 | else | |
6587 | { | |
6588 | num_used++; | |
6589 | iblk->intervals[i].gcmarkbit = 0; | |
6590 | } | |
6591 | } | |
6592 | lim = INTERVAL_BLOCK_SIZE; | |
6593 | /* If this block contains only free intervals and we have already | |
6594 | seen more than two blocks worth of free intervals then | |
6595 | deallocate this block. */ | |
6596 | if (this_free == INTERVAL_BLOCK_SIZE && num_free > INTERVAL_BLOCK_SIZE) | |
6597 | { | |
6598 | *iprev = iblk->next; | |
6599 | /* Unhook from the free list. */ | |
6600 | interval_free_list = INTERVAL_PARENT (&iblk->intervals[0]); | |
6601 | lisp_free (iblk); | |
6602 | } | |
6603 | else | |
6604 | { | |
6605 | num_free += this_free; | |
6606 | iprev = &iblk->next; | |
6607 | } | |
6608 | } | |
6609 | total_intervals = num_used; | |
6610 | total_free_intervals = num_free; | |
6611 | } | |
7146af97 | 6612 | |
b029599f DC |
6613 | NO_INLINE /* For better stack traces */ |
6614 | static void | |
6615 | sweep_symbols (void) | |
6616 | { | |
6617 | register struct symbol_block *sblk; | |
6618 | struct symbol_block **sprev = &symbol_block; | |
6619 | register int lim = symbol_block_index; | |
6620 | EMACS_INT num_free = 0, num_used = 0; | |
177c0ea7 | 6621 | |
b029599f | 6622 | symbol_free_list = NULL; |
d285b373 | 6623 | |
b029599f DC |
6624 | for (sblk = symbol_block; sblk; sblk = *sprev) |
6625 | { | |
6626 | int this_free = 0; | |
6627 | union aligned_Lisp_Symbol *sym = sblk->symbols; | |
6628 | union aligned_Lisp_Symbol *end = sym + lim; | |
177c0ea7 | 6629 | |
b029599f DC |
6630 | for (; sym < end; ++sym) |
6631 | { | |
7e31acf6 | 6632 | if (!sym->s.gcmarkbit) |
b029599f DC |
6633 | { |
6634 | if (sym->s.redirect == SYMBOL_LOCALIZED) | |
6635 | xfree (SYMBOL_BLV (&sym->s)); | |
6636 | sym->s.next = symbol_free_list; | |
6637 | symbol_free_list = &sym->s; | |
34400008 | 6638 | #if GC_MARK_STACK |
b029599f | 6639 | symbol_free_list->function = Vdead; |
34400008 | 6640 | #endif |
b029599f DC |
6641 | ++this_free; |
6642 | } | |
6643 | else | |
6644 | { | |
6645 | ++num_used; | |
b029599f | 6646 | sym->s.gcmarkbit = 0; |
e3f04a4a DC |
6647 | /* Attempt to catch bogus objects. */ |
6648 | eassert (valid_lisp_object_p (sym->s.function) >= 1); | |
b029599f DC |
6649 | } |
6650 | } | |
177c0ea7 | 6651 | |
b029599f DC |
6652 | lim = SYMBOL_BLOCK_SIZE; |
6653 | /* If this block contains only free symbols and we have already | |
6654 | seen more than two blocks worth of free symbols then deallocate | |
6655 | this block. */ | |
6656 | if (this_free == SYMBOL_BLOCK_SIZE && num_free > SYMBOL_BLOCK_SIZE) | |
6657 | { | |
6658 | *sprev = sblk->next; | |
6659 | /* Unhook from the free list. */ | |
6660 | symbol_free_list = sblk->symbols[0].s.next; | |
6661 | lisp_free (sblk); | |
6662 | } | |
6663 | else | |
6664 | { | |
6665 | num_free += this_free; | |
6666 | sprev = &sblk->next; | |
6667 | } | |
6668 | } | |
6669 | total_symbols = num_used; | |
6670 | total_free_symbols = num_free; | |
6671 | } | |
7146af97 | 6672 | |
b029599f DC |
6673 | NO_INLINE /* For better stack traces */ |
6674 | static void | |
6675 | sweep_misc (void) | |
6676 | { | |
6677 | register struct marker_block *mblk; | |
6678 | struct marker_block **mprev = &marker_block; | |
6679 | register int lim = marker_block_index; | |
6680 | EMACS_INT num_free = 0, num_used = 0; | |
7146af97 | 6681 | |
b029599f DC |
6682 | /* Put all unmarked misc's on free list. For a marker, first |
6683 | unchain it from the buffer it points into. */ | |
177c0ea7 | 6684 | |
b029599f | 6685 | marker_free_list = 0; |
fa05e253 | 6686 | |
b029599f DC |
6687 | for (mblk = marker_block; mblk; mblk = *mprev) |
6688 | { | |
6689 | register int i; | |
6690 | int this_free = 0; | |
7146af97 | 6691 | |
b029599f DC |
6692 | for (i = 0; i < lim; i++) |
6693 | { | |
6694 | if (!mblk->markers[i].m.u_any.gcmarkbit) | |
6695 | { | |
6696 | if (mblk->markers[i].m.u_any.type == Lisp_Misc_Marker) | |
6697 | unchain_marker (&mblk->markers[i].m.u_marker); | |
6698 | /* Set the type of the freed object to Lisp_Misc_Free. | |
6699 | We could leave the type alone, since nobody checks it, | |
6700 | but this might catch bugs faster. */ | |
6701 | mblk->markers[i].m.u_marker.type = Lisp_Misc_Free; | |
6702 | mblk->markers[i].m.u_free.chain = marker_free_list; | |
6703 | marker_free_list = &mblk->markers[i].m; | |
6704 | this_free++; | |
6705 | } | |
6706 | else | |
6707 | { | |
6708 | num_used++; | |
6709 | mblk->markers[i].m.u_any.gcmarkbit = 0; | |
6710 | } | |
6711 | } | |
6712 | lim = MARKER_BLOCK_SIZE; | |
6713 | /* If this block contains only free markers and we have already | |
6714 | seen more than two blocks worth of free markers then deallocate | |
6715 | this block. */ | |
6716 | if (this_free == MARKER_BLOCK_SIZE && num_free > MARKER_BLOCK_SIZE) | |
6717 | { | |
6718 | *mprev = mblk->next; | |
6719 | /* Unhook from the free list. */ | |
6720 | marker_free_list = mblk->markers[0].m.u_free.chain; | |
6721 | lisp_free (mblk); | |
6722 | } | |
6723 | else | |
6724 | { | |
6725 | num_free += this_free; | |
6726 | mprev = &mblk->next; | |
6727 | } | |
6728 | } | |
7146af97 | 6729 | |
b029599f DC |
6730 | total_markers = num_used; |
6731 | total_free_markers = num_free; | |
6732 | } | |
7146af97 | 6733 | |
b029599f DC |
6734 | NO_INLINE /* For better stack traces */ |
6735 | static void | |
6736 | sweep_buffers (void) | |
6737 | { | |
6738 | register struct buffer *buffer, **bprev = &all_buffers; | |
7146af97 | 6739 | |
b029599f DC |
6740 | total_buffers = 0; |
6741 | for (buffer = all_buffers; buffer; buffer = *bprev) | |
6742 | if (!VECTOR_MARKED_P (buffer)) | |
6743 | { | |
6744 | *bprev = buffer->next; | |
6745 | lisp_free (buffer); | |
6746 | } | |
6747 | else | |
6748 | { | |
6749 | VECTOR_UNMARK (buffer); | |
6750 | /* Do not use buffer_(set|get)_intervals here. */ | |
6751 | buffer->text->intervals = balance_intervals (buffer->text->intervals); | |
6752 | total_buffers++; | |
6753 | bprev = &buffer->next; | |
6754 | } | |
7146af97 | 6755 | } |
7146af97 | 6756 | |
b029599f DC |
6757 | /* Sweep: find all structures not marked, and free them. */ |
6758 | static void | |
6759 | gc_sweep (void) | |
6760 | { | |
6761 | /* Remove or mark entries in weak hash tables. | |
6762 | This must be done before any object is unmarked. */ | |
6763 | sweep_weak_hash_tables (); | |
7146af97 | 6764 | |
b029599f DC |
6765 | sweep_strings (); |
6766 | check_string_bytes (!noninteractive); | |
6767 | sweep_conses (); | |
6768 | sweep_floats (); | |
6769 | sweep_intervals (); | |
6770 | sweep_symbols (); | |
6771 | sweep_misc (); | |
6772 | sweep_buffers (); | |
6773 | sweep_vectors (); | |
6774 | check_string_bytes (!noninteractive); | |
6775 | } | |
7146af97 | 6776 | |
7146af97 | 6777 | \f |
20d24714 JB |
6778 | /* Debugging aids. */ |
6779 | ||
31ce1c91 | 6780 | DEFUN ("memory-limit", Fmemory_limit, Smemory_limit, 0, 0, 0, |
a6266d23 | 6781 | doc: /* Return the address of the last byte Emacs has allocated, divided by 1024. |
228299fa | 6782 | This may be helpful in debugging Emacs's memory usage. |
7ee72033 | 6783 | We divide the value by 1024 to make sure it fits in a Lisp integer. */) |
5842a27b | 6784 | (void) |
20d24714 JB |
6785 | { |
6786 | Lisp_Object end; | |
6787 | ||
5e48429a JD |
6788 | #ifdef HAVE_NS |
6789 | /* Avoid warning. sbrk has no relation to memory allocated anyway. */ | |
6790 | XSETINT (end, 0); | |
6791 | #else | |
d01a7826 | 6792 | XSETINT (end, (intptr_t) (char *) sbrk (0) / 1024); |
5e48429a | 6793 | #endif |
20d24714 JB |
6794 | |
6795 | return end; | |
6796 | } | |
6797 | ||
310ea200 | 6798 | DEFUN ("memory-use-counts", Fmemory_use_counts, Smemory_use_counts, 0, 0, 0, |
a6266d23 | 6799 | doc: /* Return a list of counters that measure how much consing there has been. |
228299fa GM |
6800 | Each of these counters increments for a certain kind of object. |
6801 | The counters wrap around from the largest positive integer to zero. | |
6802 | Garbage collection does not decrease them. | |
6803 | The elements of the value are as follows: | |
6804 | (CONSES FLOATS VECTOR-CELLS SYMBOLS STRING-CHARS MISCS INTERVALS STRINGS) | |
6805 | All are in units of 1 = one object consed | |
6806 | except for VECTOR-CELLS and STRING-CHARS, which count the total length of | |
6807 | objects consed. | |
6808 | MISCS include overlays, markers, and some internal types. | |
6809 | Frames, windows, buffers, and subprocesses count as vectors | |
7ee72033 | 6810 | (but the contents of a buffer's text do not count here). */) |
5842a27b | 6811 | (void) |
310ea200 | 6812 | { |
3438fe21 | 6813 | return listn (CONSTYPE_HEAP, 8, |
694b6c97 DA |
6814 | bounded_number (cons_cells_consed), |
6815 | bounded_number (floats_consed), | |
6816 | bounded_number (vector_cells_consed), | |
6817 | bounded_number (symbols_consed), | |
6818 | bounded_number (string_chars_consed), | |
6819 | bounded_number (misc_objects_consed), | |
6820 | bounded_number (intervals_consed), | |
6821 | bounded_number (strings_consed)); | |
310ea200 | 6822 | } |
e0b8c689 | 6823 | |
8b058d44 EZ |
6824 | /* Find at most FIND_MAX symbols which have OBJ as their value or |
6825 | function. This is used in gdbinit's `xwhichsymbols' command. */ | |
6826 | ||
6827 | Lisp_Object | |
196e41e4 | 6828 | which_symbols (Lisp_Object obj, EMACS_INT find_max) |
8b058d44 EZ |
6829 | { |
6830 | struct symbol_block *sblk; | |
8d0eb4c2 | 6831 | ptrdiff_t gc_count = inhibit_garbage_collection (); |
8b058d44 EZ |
6832 | Lisp_Object found = Qnil; |
6833 | ||
ca78dc43 | 6834 | if (! DEADP (obj)) |
8b058d44 EZ |
6835 | { |
6836 | for (sblk = symbol_block; sblk; sblk = sblk->next) | |
6837 | { | |
9426aba4 | 6838 | union aligned_Lisp_Symbol *aligned_sym = sblk->symbols; |
8b058d44 EZ |
6839 | int bn; |
6840 | ||
9426aba4 | 6841 | for (bn = 0; bn < SYMBOL_BLOCK_SIZE; bn++, aligned_sym++) |
8b058d44 | 6842 | { |
9426aba4 | 6843 | struct Lisp_Symbol *sym = &aligned_sym->s; |
8b058d44 EZ |
6844 | Lisp_Object val; |
6845 | Lisp_Object tem; | |
6846 | ||
6847 | if (sblk == symbol_block && bn >= symbol_block_index) | |
6848 | break; | |
6849 | ||
6850 | XSETSYMBOL (tem, sym); | |
6851 | val = find_symbol_value (tem); | |
6852 | if (EQ (val, obj) | |
c644523b DA |
6853 | || EQ (sym->function, obj) |
6854 | || (!NILP (sym->function) | |
6855 | && COMPILEDP (sym->function) | |
6856 | && EQ (AREF (sym->function, COMPILED_BYTECODE), obj)) | |
8b058d44 EZ |
6857 | || (!NILP (val) |
6858 | && COMPILEDP (val) | |
6859 | && EQ (AREF (val, COMPILED_BYTECODE), obj))) | |
6860 | { | |
6861 | found = Fcons (tem, found); | |
6862 | if (--find_max == 0) | |
6863 | goto out; | |
6864 | } | |
6865 | } | |
6866 | } | |
6867 | } | |
6868 | ||
6869 | out: | |
6870 | unbind_to (gc_count, Qnil); | |
6871 | return found; | |
6872 | } | |
6873 | ||
01ae0fbf DC |
6874 | #ifdef SUSPICIOUS_OBJECT_CHECKING |
6875 | ||
608a4502 | 6876 | static void * |
faa52174 | 6877 | find_suspicious_object_in_range (void *begin, void *end) |
01ae0fbf | 6878 | { |
faa52174 PE |
6879 | char *begin_a = begin; |
6880 | char *end_a = end; | |
01ae0fbf DC |
6881 | int i; |
6882 | ||
faa52174 PE |
6883 | for (i = 0; i < ARRAYELTS (suspicious_objects); ++i) |
6884 | { | |
6885 | char *suspicious_object = suspicious_objects[i]; | |
6886 | if (begin_a <= suspicious_object && suspicious_object < end_a) | |
6887 | return suspicious_object; | |
6888 | } | |
01ae0fbf DC |
6889 | |
6890 | return NULL; | |
6891 | } | |
6892 | ||
6893 | static void | |
1b85074c | 6894 | note_suspicious_free (void* ptr) |
01ae0fbf | 6895 | { |
01ae0fbf DC |
6896 | struct suspicious_free_record* rec; |
6897 | ||
1b85074c DC |
6898 | rec = &suspicious_free_history[suspicious_free_history_index++]; |
6899 | if (suspicious_free_history_index == | |
1e1a3a32 | 6900 | ARRAYELTS (suspicious_free_history)) |
1b85074c DC |
6901 | { |
6902 | suspicious_free_history_index = 0; | |
6903 | } | |
6904 | ||
6905 | memset (rec, 0, sizeof (*rec)); | |
6906 | rec->suspicious_object = ptr; | |
1e1a3a32 | 6907 | backtrace (&rec->backtrace[0], ARRAYELTS (rec->backtrace)); |
1b85074c DC |
6908 | } |
6909 | ||
6910 | static void | |
6911 | detect_suspicious_free (void* ptr) | |
01ae0fbf DC |
6912 | { |
6913 | int i; | |
01ae0fbf DC |
6914 | |
6915 | eassert (ptr != NULL); | |
6916 | ||
c72d972c | 6917 | for (i = 0; i < ARRAYELTS (suspicious_objects); ++i) |
01ae0fbf DC |
6918 | if (suspicious_objects[i] == ptr) |
6919 | { | |
1b85074c | 6920 | note_suspicious_free (ptr); |
01ae0fbf DC |
6921 | suspicious_objects[i] = NULL; |
6922 | } | |
6923 | } | |
6924 | ||
6925 | #endif /* SUSPICIOUS_OBJECT_CHECKING */ | |
6926 | ||
6927 | DEFUN ("suspicious-object", Fsuspicious_object, Ssuspicious_object, 1, 1, 0, | |
6928 | doc: /* Return OBJ, maybe marking it for extra scrutiny. | |
6929 | If Emacs is compiled with suspicous object checking, capture | |
6930 | a stack trace when OBJ is freed in order to help track down | |
6931 | garbage collection bugs. Otherwise, do nothing and return OBJ. */) | |
6932 | (Lisp_Object obj) | |
6933 | { | |
6934 | #ifdef SUSPICIOUS_OBJECT_CHECKING | |
6935 | /* Right now, we care only about vectors. */ | |
faa52174 PE |
6936 | if (VECTORLIKEP (obj)) |
6937 | { | |
6938 | suspicious_objects[suspicious_object_index++] = XVECTOR (obj); | |
6939 | if (suspicious_object_index == ARRAYELTS (suspicious_objects)) | |
6940 | suspicious_object_index = 0; | |
6941 | } | |
01ae0fbf DC |
6942 | #endif |
6943 | return obj; | |
6944 | } | |
6945 | ||
244ed907 | 6946 | #ifdef ENABLE_CHECKING |
f4a681b0 | 6947 | |
fce31d69 | 6948 | bool suppress_checking; |
d3d47262 | 6949 | |
e0b8c689 | 6950 | void |
971de7fb | 6951 | die (const char *msg, const char *file, int line) |
e0b8c689 | 6952 | { |
5013fc08 | 6953 | fprintf (stderr, "\r\n%s:%d: Emacs fatal error: assertion failed: %s\r\n", |
e0b8c689 | 6954 | file, line, msg); |
4d7e6e51 | 6955 | terminate_due_to_signal (SIGABRT, INT_MAX); |
e0b8c689 | 6956 | } |
244ed907 | 6957 | #endif |
20d24714 | 6958 | \f |
b09cca6a | 6959 | /* Initialization. */ |
7146af97 | 6960 | |
dfcf069d | 6961 | void |
971de7fb | 6962 | init_alloc_once (void) |
7146af97 JB |
6963 | { |
6964 | /* Used to do Vpurify_flag = Qt here, but Qt isn't set up yet! */ | |
9e713715 GM |
6965 | purebeg = PUREBEG; |
6966 | pure_size = PURESIZE; | |
ab6780cd | 6967 | |
877935b1 | 6968 | #if GC_MARK_STACK || defined GC_MALLOC_CHECK |
34400008 GM |
6969 | mem_init (); |
6970 | Vdead = make_pure_string ("DEAD", 4, 4, 0); | |
6971 | #endif | |
9e713715 | 6972 | |
d1658221 | 6973 | #ifdef DOUG_LEA_MALLOC |
b09cca6a SM |
6974 | mallopt (M_TRIM_THRESHOLD, 128 * 1024); /* Trim threshold. */ |
6975 | mallopt (M_MMAP_THRESHOLD, 64 * 1024); /* Mmap threshold. */ | |
6976 | mallopt (M_MMAP_MAX, MMAP_MAX_AREAS); /* Max. number of mmap'ed areas. */ | |
d1658221 | 6977 | #endif |
7146af97 | 6978 | init_strings (); |
f3372c87 | 6979 | init_vectors (); |
d5e35230 | 6980 | |
24d8a105 | 6981 | refill_memory_reserve (); |
0dd6d66d | 6982 | gc_cons_threshold = GC_DEFAULT_THRESHOLD; |
7146af97 JB |
6983 | } |
6984 | ||
dfcf069d | 6985 | void |
971de7fb | 6986 | init_alloc (void) |
7146af97 JB |
6987 | { |
6988 | gcprolist = 0; | |
630686c8 | 6989 | byte_stack_list = 0; |
182ff242 GM |
6990 | #if GC_MARK_STACK |
6991 | #if !defined GC_SAVE_REGISTERS_ON_STACK && !defined GC_SETJMP_WORKS | |
6992 | setjmp_tested_p = longjmps_done = 0; | |
6993 | #endif | |
6994 | #endif | |
2c5bd608 DL |
6995 | Vgc_elapsed = make_float (0.0); |
6996 | gcs_done = 0; | |
a84683fd DC |
6997 | |
6998 | #if USE_VALGRIND | |
d160dd0c | 6999 | valgrind_p = RUNNING_ON_VALGRIND != 0; |
a84683fd | 7000 | #endif |
7146af97 JB |
7001 | } |
7002 | ||
7003 | void | |
971de7fb | 7004 | syms_of_alloc (void) |
7146af97 | 7005 | { |
29208e82 | 7006 | DEFVAR_INT ("gc-cons-threshold", gc_cons_threshold, |
fb7ada5f | 7007 | doc: /* Number of bytes of consing between garbage collections. |
228299fa GM |
7008 | Garbage collection can happen automatically once this many bytes have been |
7009 | allocated since the last garbage collection. All data types count. | |
7146af97 | 7010 | |
228299fa | 7011 | Garbage collection happens automatically only when `eval' is called. |
7146af97 | 7012 | |
228299fa | 7013 | By binding this temporarily to a large number, you can effectively |
96f077ad SM |
7014 | prevent garbage collection during a part of the program. |
7015 | See also `gc-cons-percentage'. */); | |
7016 | ||
29208e82 | 7017 | DEFVAR_LISP ("gc-cons-percentage", Vgc_cons_percentage, |
fb7ada5f | 7018 | doc: /* Portion of the heap used for allocation. |
96f077ad SM |
7019 | Garbage collection can happen automatically once this portion of the heap |
7020 | has been allocated since the last garbage collection. | |
7021 | If this portion is smaller than `gc-cons-threshold', this is ignored. */); | |
7022 | Vgc_cons_percentage = make_float (0.1); | |
0819585c | 7023 | |
29208e82 | 7024 | DEFVAR_INT ("pure-bytes-used", pure_bytes_used, |
333f9019 | 7025 | doc: /* Number of bytes of shareable Lisp data allocated so far. */); |
0819585c | 7026 | |
29208e82 | 7027 | DEFVAR_INT ("cons-cells-consed", cons_cells_consed, |
a6266d23 | 7028 | doc: /* Number of cons cells that have been consed so far. */); |
0819585c | 7029 | |
29208e82 | 7030 | DEFVAR_INT ("floats-consed", floats_consed, |
a6266d23 | 7031 | doc: /* Number of floats that have been consed so far. */); |
0819585c | 7032 | |
29208e82 | 7033 | DEFVAR_INT ("vector-cells-consed", vector_cells_consed, |
a6266d23 | 7034 | doc: /* Number of vector cells that have been consed so far. */); |
0819585c | 7035 | |
29208e82 | 7036 | DEFVAR_INT ("symbols-consed", symbols_consed, |
a6266d23 | 7037 | doc: /* Number of symbols that have been consed so far. */); |
0819585c | 7038 | |
29208e82 | 7039 | DEFVAR_INT ("string-chars-consed", string_chars_consed, |
a6266d23 | 7040 | doc: /* Number of string characters that have been consed so far. */); |
0819585c | 7041 | |
29208e82 | 7042 | DEFVAR_INT ("misc-objects-consed", misc_objects_consed, |
01a6dcc8 GM |
7043 | doc: /* Number of miscellaneous objects that have been consed so far. |
7044 | These include markers and overlays, plus certain objects not visible | |
7045 | to users. */); | |
2e471eb5 | 7046 | |
29208e82 | 7047 | DEFVAR_INT ("intervals-consed", intervals_consed, |
a6266d23 | 7048 | doc: /* Number of intervals that have been consed so far. */); |
7146af97 | 7049 | |
29208e82 | 7050 | DEFVAR_INT ("strings-consed", strings_consed, |
a6266d23 | 7051 | doc: /* Number of strings that have been consed so far. */); |
228299fa | 7052 | |
29208e82 | 7053 | DEFVAR_LISP ("purify-flag", Vpurify_flag, |
a6266d23 | 7054 | doc: /* Non-nil means loading Lisp code in order to dump an executable. |
e9515805 SM |
7055 | This means that certain objects should be allocated in shared (pure) space. |
7056 | It can also be set to a hash-table, in which case this table is used to | |
7057 | do hash-consing of the objects allocated to pure space. */); | |
228299fa | 7058 | |
29208e82 | 7059 | DEFVAR_BOOL ("garbage-collection-messages", garbage_collection_messages, |
a6266d23 | 7060 | doc: /* Non-nil means display messages at start and end of garbage collection. */); |
299585ee RS |
7061 | garbage_collection_messages = 0; |
7062 | ||
29208e82 | 7063 | DEFVAR_LISP ("post-gc-hook", Vpost_gc_hook, |
a6266d23 | 7064 | doc: /* Hook run after garbage collection has finished. */); |
9e713715 | 7065 | Vpost_gc_hook = Qnil; |
cd3520a4 | 7066 | DEFSYM (Qpost_gc_hook, "post-gc-hook"); |
9e713715 | 7067 | |
29208e82 | 7068 | DEFVAR_LISP ("memory-signal-data", Vmemory_signal_data, |
74a54b04 | 7069 | doc: /* Precomputed `signal' argument for memory-full error. */); |
bcb61d60 KH |
7070 | /* We build this in advance because if we wait until we need it, we might |
7071 | not be able to allocate the memory to hold it. */ | |
74a54b04 | 7072 | Vmemory_signal_data |
3438fe21 | 7073 | = listn (CONSTYPE_PURE, 2, Qerror, |
694b6c97 | 7074 | build_pure_c_string ("Memory exhausted--use M-x save-some-buffers then exit and restart Emacs")); |
74a54b04 | 7075 | |
29208e82 | 7076 | DEFVAR_LISP ("memory-full", Vmemory_full, |
24d8a105 | 7077 | doc: /* Non-nil means Emacs cannot get much more Lisp memory. */); |
74a54b04 | 7078 | Vmemory_full = Qnil; |
bcb61d60 | 7079 | |
fecbd8ff SM |
7080 | DEFSYM (Qconses, "conses"); |
7081 | DEFSYM (Qsymbols, "symbols"); | |
7082 | DEFSYM (Qmiscs, "miscs"); | |
7083 | DEFSYM (Qstrings, "strings"); | |
7084 | DEFSYM (Qvectors, "vectors"); | |
7085 | DEFSYM (Qfloats, "floats"); | |
7086 | DEFSYM (Qintervals, "intervals"); | |
7087 | DEFSYM (Qbuffers, "buffers"); | |
5b835e1d DA |
7088 | DEFSYM (Qstring_bytes, "string-bytes"); |
7089 | DEFSYM (Qvector_slots, "vector-slots"); | |
f8643a6b | 7090 | DEFSYM (Qheap, "heap"); |
3d80c99f | 7091 | DEFSYM (Qautomatic_gc, "Automatic GC"); |
5b835e1d | 7092 | |
cd3520a4 JB |
7093 | DEFSYM (Qgc_cons_threshold, "gc-cons-threshold"); |
7094 | DEFSYM (Qchar_table_extra_slots, "char-table-extra-slots"); | |
a59de17b | 7095 | |
29208e82 | 7096 | DEFVAR_LISP ("gc-elapsed", Vgc_elapsed, |
2c5bd608 | 7097 | doc: /* Accumulated time elapsed in garbage collections. |
e7415487 | 7098 | The time is in seconds as a floating point value. */); |
29208e82 | 7099 | DEFVAR_INT ("gcs-done", gcs_done, |
e7415487 | 7100 | doc: /* Accumulated number of garbage collections done. */); |
2c5bd608 | 7101 | |
7146af97 JB |
7102 | defsubr (&Scons); |
7103 | defsubr (&Slist); | |
7104 | defsubr (&Svector); | |
7105 | defsubr (&Smake_byte_code); | |
7106 | defsubr (&Smake_list); | |
7107 | defsubr (&Smake_vector); | |
7108 | defsubr (&Smake_string); | |
7b07587b | 7109 | defsubr (&Smake_bool_vector); |
7146af97 JB |
7110 | defsubr (&Smake_symbol); |
7111 | defsubr (&Smake_marker); | |
7112 | defsubr (&Spurecopy); | |
7113 | defsubr (&Sgarbage_collect); | |
20d24714 | 7114 | defsubr (&Smemory_limit); |
310ea200 | 7115 | defsubr (&Smemory_use_counts); |
01ae0fbf | 7116 | defsubr (&Ssuspicious_object); |
34400008 GM |
7117 | |
7118 | #if GC_MARK_STACK == GC_USE_GCPROS_CHECK_ZOMBIES | |
7119 | defsubr (&Sgc_status); | |
7120 | #endif | |
7146af97 | 7121 | } |
5eceb8fb | 7122 | |
4706125e PE |
7123 | /* When compiled with GCC, GDB might say "No enum type named |
7124 | pvec_type" if we don't have at least one symbol with that type, and | |
7125 | then xbacktrace could fail. Similarly for the other enums and | |
62aba0d4 FP |
7126 | their values. Some non-GCC compilers don't like these constructs. */ |
7127 | #ifdef __GNUC__ | |
4706125e PE |
7128 | union |
7129 | { | |
03a660a6 PE |
7130 | enum CHARTAB_SIZE_BITS CHARTAB_SIZE_BITS; |
7131 | enum CHAR_TABLE_STANDARD_SLOTS CHAR_TABLE_STANDARD_SLOTS; | |
7132 | enum char_bits char_bits; | |
4706125e | 7133 | enum CHECK_LISP_OBJECT_TYPE CHECK_LISP_OBJECT_TYPE; |
03a660a6 | 7134 | enum DEFAULT_HASH_SIZE DEFAULT_HASH_SIZE; |
03a660a6 | 7135 | enum FLOAT_TO_STRING_BUFSIZE FLOAT_TO_STRING_BUFSIZE; |
4706125e | 7136 | enum Lisp_Bits Lisp_Bits; |
03a660a6 PE |
7137 | enum Lisp_Compiled Lisp_Compiled; |
7138 | enum maxargs maxargs; | |
7139 | enum MAX_ALLOCA MAX_ALLOCA; | |
4706125e PE |
7140 | enum More_Lisp_Bits More_Lisp_Bits; |
7141 | enum pvec_type pvec_type; | |
7142 | } const EXTERNALLY_VISIBLE gdb_make_enums_visible = {0}; | |
62aba0d4 | 7143 | #endif /* __GNUC__ */ |