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8fc5ef7d BT |
1 | /* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
2 | * 2004, 2006, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. | |
c7743d02 | 3 | * |
73be1d9e | 4 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
5 | * modify it under the terms of the GNU Lesser General Public License |
6 | * as published by the Free Software Foundation; either version 3 of | |
7 | * the License, or (at your option) any later version. | |
c7743d02 | 8 | * |
53befeb7 NJ |
9 | * This library is distributed in the hope that it will be useful, but |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. | |
c7743d02 | 13 | * |
73be1d9e MV |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
17 | * 02110-1301 USA | |
73be1d9e | 18 | */ |
c7743d02 HWN |
19 | |
20 | ||
21 | \f | |
dbb605f5 | 22 | #ifdef HAVE_CONFIG_H |
132fa21f RB |
23 | # include <config.h> |
24 | #endif | |
25 | ||
c7743d02 HWN |
26 | #include <stdio.h> |
27 | #include <errno.h> | |
28 | #include <string.h> | |
34cf38c3 | 29 | #include <stdlib.h> |
c7743d02 HWN |
30 | |
31 | #ifdef __ia64__ | |
32 | #include <ucontext.h> | |
33 | extern unsigned long * __libc_ia64_register_backing_store_base; | |
34 | #endif | |
35 | ||
36 | #include "libguile/_scm.h" | |
37 | #include "libguile/eval.h" | |
38 | #include "libguile/stime.h" | |
39 | #include "libguile/stackchk.h" | |
40 | #include "libguile/struct.h" | |
41 | #include "libguile/smob.h" | |
2fa901a5 | 42 | #include "libguile/arrays.h" |
c7743d02 HWN |
43 | #include "libguile/async.h" |
44 | #include "libguile/ports.h" | |
45 | #include "libguile/root.h" | |
46 | #include "libguile/strings.h" | |
47 | #include "libguile/vectors.h" | |
48 | #include "libguile/weaks.h" | |
49 | #include "libguile/hashtab.h" | |
50 | #include "libguile/tags.h" | |
51 | ||
52 | #include "libguile/validate.h" | |
53 | #include "libguile/deprecation.h" | |
54 | #include "libguile/gc.h" | |
55 | ||
56 | #include "libguile/private-gc.h" | |
57 | ||
58 | #ifdef GUILE_DEBUG_MALLOC | |
59 | #include "libguile/debug-malloc.h" | |
60 | #endif | |
61 | ||
c7743d02 HWN |
62 | #ifdef HAVE_UNISTD_H |
63 | #include <unistd.h> | |
64 | #endif | |
65 | ||
66 | /* | |
67 | INIT_MALLOC_LIMIT is the initial amount of malloc usage which will | |
68 | trigger a GC. | |
69 | ||
70 | After startup (at the guile> prompt), we have approximately 100k of | |
71 | alloced memory, which won't go away on GC. Let's set the init such | |
72 | that we get a nice yield on the next allocation: | |
73 | */ | |
c2cbcc57 | 74 | #define SCM_DEFAULT_INIT_MALLOC_LIMIT 200*1024 |
c7743d02 HWN |
75 | #define SCM_DEFAULT_MALLOC_MINYIELD 40 |
76 | ||
61ef9c1f | 77 | /* #define DEBUGINFO */ |
c7743d02 | 78 | |
c7743d02 HWN |
79 | |
80 | \f | |
81 | /* Function for non-cell memory management. | |
82 | */ | |
83 | ||
c7743d02 HWN |
84 | void * |
85 | scm_realloc (void *mem, size_t size) | |
86 | { | |
87 | void *ptr; | |
88 | ||
fd51e661 AW |
89 | scm_gc_register_allocation (size); |
90 | ||
c7743d02 HWN |
91 | SCM_SYSCALL (ptr = realloc (mem, size)); |
92 | if (ptr) | |
93 | return ptr; | |
94 | ||
26224b3f | 95 | /* Time is hard: trigger a full, ``stop-the-world'' GC, and try again. */ |
4eb28612 | 96 | #ifdef HAVE_GC_GCOLLECT_AND_UNMAP |
fd51e661 | 97 | GC_gcollect_and_unmap (); |
4eb28612 CJY |
98 | #else |
99 | GC_gcollect (); | |
100 | #endif | |
b17e0ac3 | 101 | |
c7743d02 HWN |
102 | SCM_SYSCALL (ptr = realloc (mem, size)); |
103 | if (ptr) | |
104 | return ptr; | |
105 | ||
106 | scm_memory_error ("realloc"); | |
107 | } | |
108 | ||
39e8f371 HWN |
109 | void * |
110 | scm_malloc (size_t sz) | |
111 | { | |
112 | return scm_realloc (NULL, sz); | |
113 | } | |
ba1b2226 HWN |
114 | |
115 | /* | |
116 | Hmm. Should we use the C convention for arguments (i.e. N_ELTS, | |
117 | SIZEOF_ELT)? --hwn | |
118 | */ | |
119 | void * | |
120 | scm_calloc (size_t sz) | |
121 | { | |
1383773b HWN |
122 | void * ptr; |
123 | ||
124 | /* | |
125 | By default, try to use calloc, as it is likely more efficient than | |
126 | calling memset by hand. | |
127 | */ | |
fb50ef08 | 128 | SCM_SYSCALL (ptr = calloc (sz, 1)); |
1383773b HWN |
129 | if (ptr) |
130 | return ptr; | |
26224b3f | 131 | |
1383773b | 132 | ptr = scm_realloc (NULL, sz); |
ba1b2226 HWN |
133 | memset (ptr, 0x0, sz); |
134 | return ptr; | |
135 | } | |
136 | ||
39e8f371 | 137 | |
c7743d02 HWN |
138 | char * |
139 | scm_strndup (const char *str, size_t n) | |
140 | { | |
fb50ef08 | 141 | char *dst = scm_malloc (n + 1); |
c7743d02 HWN |
142 | memcpy (dst, str, n); |
143 | dst[n] = 0; | |
144 | return dst; | |
145 | } | |
146 | ||
147 | char * | |
148 | scm_strdup (const char *str) | |
149 | { | |
150 | return scm_strndup (str, strlen (str)); | |
151 | } | |
152 | ||
b17e0ac3 | 153 | |
cbfe8e62 HWN |
154 | |
155 | void | |
156 | scm_gc_register_collectable_memory (void *mem, size_t size, const char *what) | |
157 | { | |
76f3ee77 AW |
158 | scm_gc_register_allocation (size); |
159 | ||
c7743d02 HWN |
160 | #ifdef GUILE_DEBUG_MALLOC |
161 | if (mem) | |
8fc5ef7d | 162 | scm_malloc_register (mem, what); |
c7743d02 HWN |
163 | #endif |
164 | } | |
165 | ||
cbfe8e62 | 166 | |
c7743d02 HWN |
167 | void |
168 | scm_gc_unregister_collectable_memory (void *mem, size_t size, const char *what) | |
169 | { | |
c5018a2b | 170 | /* Nothing to do. */ |
c7743d02 HWN |
171 | #ifdef GUILE_DEBUG_MALLOC |
172 | if (mem) | |
173 | scm_malloc_unregister (mem); | |
174 | #endif | |
175 | } | |
176 | ||
3ef6650d AW |
177 | /* Allocate SIZE bytes of memory whose contents should not be scanned |
178 | for pointers (useful, e.g., for strings). Note though that this | |
179 | memory is *not* cleared; be sure to initialize it to prevent | |
180 | information leaks. */ | |
c5018a2b LC |
181 | void * |
182 | scm_gc_malloc_pointerless (size_t size, const char *what) | |
183 | { | |
184 | return GC_MALLOC_ATOMIC (size); | |
185 | } | |
186 | ||
c7743d02 HWN |
187 | void * |
188 | scm_gc_malloc (size_t size, const char *what) | |
189 | { | |
ea4f8ea1 LC |
190 | void *ptr; |
191 | ||
192 | if (size == 0) | |
193 | /* `GC_MALLOC ()' doesn't handle zero. */ | |
194 | size = sizeof (void *); | |
195 | ||
196 | ptr = GC_MALLOC (size); | |
197 | ||
c7743d02 HWN |
198 | return ptr; |
199 | } | |
200 | ||
39e8f371 HWN |
201 | void * |
202 | scm_gc_calloc (size_t size, const char *what) | |
203 | { | |
b1f6293e LC |
204 | /* `GC_MALLOC ()' always returns a zeroed buffer. */ |
205 | return scm_gc_malloc (size, what); | |
39e8f371 HWN |
206 | } |
207 | ||
208 | ||
c7743d02 HWN |
209 | void * |
210 | scm_gc_realloc (void *mem, size_t old_size, size_t new_size, const char *what) | |
211 | { | |
53f18a0d KR |
212 | void *ptr; |
213 | ||
26224b3f | 214 | ptr = GC_REALLOC (mem, new_size); |
cbfe8e62 HWN |
215 | |
216 | #ifdef GUILE_DEBUG_MALLOC | |
217 | if (mem) | |
218 | scm_malloc_reregister (mem, ptr, what); | |
219 | #endif | |
26224b3f | 220 | |
c7743d02 HWN |
221 | return ptr; |
222 | } | |
223 | ||
224 | void | |
225 | scm_gc_free (void *mem, size_t size, const char *what) | |
226 | { | |
227 | scm_gc_unregister_collectable_memory (mem, size, what); | |
26224b3f | 228 | GC_FREE (mem); |
c7743d02 HWN |
229 | } |
230 | ||
231 | char * | |
232 | scm_gc_strndup (const char *str, size_t n, const char *what) | |
233 | { | |
e7acfa88 | 234 | char *dst = GC_MALLOC_ATOMIC (n + 1); |
c7743d02 HWN |
235 | memcpy (dst, str, n); |
236 | dst[n] = 0; | |
237 | return dst; | |
238 | } | |
239 | ||
240 | char * | |
241 | scm_gc_strdup (const char *str, const char *what) | |
242 | { | |
243 | return scm_gc_strndup (str, strlen (str), what); | |
244 | } | |
245 | ||
246 | #if SCM_ENABLE_DEPRECATED == 1 | |
247 | ||
248 | /* {Deprecated front end to malloc} | |
249 | * | |
250 | * scm_must_malloc, scm_must_realloc, scm_must_free, scm_done_malloc, | |
251 | * scm_done_free | |
252 | * | |
253 | * These functions provide services comparable to malloc, realloc, and | |
0eedfa5c | 254 | * free. |
c7743d02 | 255 | * |
0eedfa5c AW |
256 | * There has been a fair amount of confusion around the use of these functions; |
257 | * see "Memory Blocks" in the manual. They are totally unnecessary in 2.0 given | |
258 | * the Boehm GC. | |
c7743d02 HWN |
259 | */ |
260 | ||
261 | void * | |
262 | scm_must_malloc (size_t size, const char *what) | |
263 | { | |
264 | scm_c_issue_deprecation_warning | |
265 | ("scm_must_malloc is deprecated. " | |
266 | "Use scm_gc_malloc and scm_gc_free instead."); | |
267 | ||
268 | return scm_gc_malloc (size, what); | |
269 | } | |
270 | ||
271 | void * | |
272 | scm_must_realloc (void *where, | |
273 | size_t old_size, | |
274 | size_t size, | |
275 | const char *what) | |
276 | { | |
277 | scm_c_issue_deprecation_warning | |
278 | ("scm_must_realloc is deprecated. " | |
279 | "Use scm_gc_realloc and scm_gc_free instead."); | |
280 | ||
281 | return scm_gc_realloc (where, old_size, size, what); | |
282 | } | |
283 | ||
284 | char * | |
285 | scm_must_strndup (const char *str, size_t length) | |
286 | { | |
287 | scm_c_issue_deprecation_warning | |
288 | ("scm_must_strndup is deprecated. " | |
289 | "Use scm_gc_strndup and scm_gc_free instead."); | |
290 | ||
291 | return scm_gc_strndup (str, length, "string"); | |
292 | } | |
293 | ||
294 | char * | |
295 | scm_must_strdup (const char *str) | |
296 | { | |
297 | scm_c_issue_deprecation_warning | |
298 | ("scm_must_strdup is deprecated. " | |
299 | "Use scm_gc_strdup and scm_gc_free instead."); | |
300 | ||
301 | return scm_gc_strdup (str, "string"); | |
302 | } | |
303 | ||
304 | void | |
305 | scm_must_free (void *obj) | |
306 | #define FUNC_NAME "scm_must_free" | |
307 | { | |
308 | scm_c_issue_deprecation_warning | |
309 | ("scm_must_free is deprecated. " | |
310 | "Use scm_gc_malloc and scm_gc_free instead."); | |
311 | ||
312 | #ifdef GUILE_DEBUG_MALLOC | |
313 | scm_malloc_unregister (obj); | |
314 | #endif | |
c291b588 | 315 | |
0eedfa5c | 316 | GC_FREE (obj); |
c7743d02 HWN |
317 | } |
318 | #undef FUNC_NAME | |
319 | ||
320 | ||
321 | void | |
322 | scm_done_malloc (long size) | |
323 | { | |
324 | scm_c_issue_deprecation_warning | |
325 | ("scm_done_malloc is deprecated. " | |
326 | "Use scm_gc_register_collectable_memory instead."); | |
327 | ||
4cd3853f KR |
328 | if (size >= 0) |
329 | scm_gc_register_collectable_memory (NULL, size, "foreign mallocs"); | |
330 | else | |
331 | scm_gc_unregister_collectable_memory (NULL, -size, "foreign mallocs"); | |
c7743d02 HWN |
332 | } |
333 | ||
334 | void | |
335 | scm_done_free (long size) | |
336 | { | |
337 | scm_c_issue_deprecation_warning | |
338 | ("scm_done_free is deprecated. " | |
339 | "Use scm_gc_unregister_collectable_memory instead."); | |
340 | ||
4cd3853f KR |
341 | if (size >= 0) |
342 | scm_gc_unregister_collectable_memory (NULL, size, "foreign mallocs"); | |
343 | else | |
344 | scm_gc_register_collectable_memory (NULL, -size, "foreign mallocs"); | |
c7743d02 HWN |
345 | } |
346 | ||
347 | #endif /* SCM_ENABLE_DEPRECATED == 1 */ |