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8fc5ef7d | 1 | /* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
03d12949 | 2 | * 2004, 2006, 2008, 2009, 2010, 2011, 2012, 2013 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" | |
c7743d02 HWN |
48 | #include "libguile/hashtab.h" |
49 | #include "libguile/tags.h" | |
50 | ||
51 | #include "libguile/validate.h" | |
52 | #include "libguile/deprecation.h" | |
53 | #include "libguile/gc.h" | |
54 | ||
55 | #include "libguile/private-gc.h" | |
56 | ||
57 | #ifdef GUILE_DEBUG_MALLOC | |
58 | #include "libguile/debug-malloc.h" | |
59 | #endif | |
60 | ||
c7743d02 HWN |
61 | #ifdef HAVE_UNISTD_H |
62 | #include <unistd.h> | |
63 | #endif | |
64 | ||
65 | /* | |
66 | INIT_MALLOC_LIMIT is the initial amount of malloc usage which will | |
67 | trigger a GC. | |
68 | ||
69 | After startup (at the guile> prompt), we have approximately 100k of | |
70 | alloced memory, which won't go away on GC. Let's set the init such | |
71 | that we get a nice yield on the next allocation: | |
72 | */ | |
c2cbcc57 | 73 | #define SCM_DEFAULT_INIT_MALLOC_LIMIT 200*1024 |
c7743d02 HWN |
74 | #define SCM_DEFAULT_MALLOC_MINYIELD 40 |
75 | ||
61ef9c1f | 76 | /* #define DEBUGINFO */ |
c7743d02 | 77 | |
c7743d02 HWN |
78 | |
79 | \f | |
817307cc AW |
80 | |
81 | static void* | |
82 | do_realloc (void *from, size_t new_size) | |
83 | { | |
84 | scm_gc_register_allocation (new_size); | |
85 | return realloc (from, new_size); | |
86 | } | |
87 | ||
88 | static void* | |
89 | do_calloc (size_t n, size_t size) | |
90 | { | |
91 | scm_gc_register_allocation (size); | |
92 | return calloc (n, size); | |
93 | } | |
94 | ||
95 | static void* | |
96 | do_gc_malloc (size_t size, const char *what) | |
97 | { | |
98 | /* Ensure nonzero size to be compatible with always-nonzero return of | |
99 | glibc malloc. */ | |
100 | return GC_MALLOC (size ? size : sizeof (void *)); | |
101 | } | |
102 | ||
103 | static void* | |
104 | do_gc_malloc_atomic (size_t size, const char *what) | |
105 | { | |
106 | return GC_MALLOC_ATOMIC (size ? size : sizeof (void *)); | |
107 | } | |
108 | ||
109 | static void* | |
110 | do_gc_realloc (void *from, size_t size, const char *what) | |
111 | { | |
112 | return GC_REALLOC (from, size ? size : sizeof (void *)); | |
113 | } | |
114 | ||
115 | static void | |
116 | do_gc_free (void *ptr) | |
117 | { | |
118 | GC_FREE (ptr); | |
119 | } | |
120 | ||
121 | ||
122 | \f | |
c7743d02 HWN |
123 | /* Function for non-cell memory management. |
124 | */ | |
125 | ||
c7743d02 HWN |
126 | void * |
127 | scm_realloc (void *mem, size_t size) | |
128 | { | |
129 | void *ptr; | |
130 | ||
817307cc | 131 | ptr = do_realloc (mem, size); |
fd51e661 | 132 | |
817307cc | 133 | if (ptr || size == 0) |
c7743d02 HWN |
134 | return ptr; |
135 | ||
26224b3f | 136 | /* Time is hard: trigger a full, ``stop-the-world'' GC, and try again. */ |
fd51e661 | 137 | GC_gcollect_and_unmap (); |
b17e0ac3 | 138 | |
817307cc | 139 | ptr = do_realloc (mem, size); |
c7743d02 HWN |
140 | if (ptr) |
141 | return ptr; | |
142 | ||
143 | scm_memory_error ("realloc"); | |
144 | } | |
145 | ||
39e8f371 HWN |
146 | void * |
147 | scm_malloc (size_t sz) | |
148 | { | |
149 | return scm_realloc (NULL, sz); | |
150 | } | |
ba1b2226 HWN |
151 | |
152 | /* | |
153 | Hmm. Should we use the C convention for arguments (i.e. N_ELTS, | |
154 | SIZEOF_ELT)? --hwn | |
155 | */ | |
156 | void * | |
157 | scm_calloc (size_t sz) | |
158 | { | |
1383773b HWN |
159 | void * ptr; |
160 | ||
161 | /* | |
162 | By default, try to use calloc, as it is likely more efficient than | |
163 | calling memset by hand. | |
164 | */ | |
817307cc AW |
165 | ptr = do_calloc (sz, 1); |
166 | if (ptr || sz == 0) | |
1383773b | 167 | return ptr; |
26224b3f | 168 | |
1383773b | 169 | ptr = scm_realloc (NULL, sz); |
ba1b2226 HWN |
170 | memset (ptr, 0x0, sz); |
171 | return ptr; | |
172 | } | |
173 | ||
39e8f371 | 174 | |
c7743d02 HWN |
175 | char * |
176 | scm_strndup (const char *str, size_t n) | |
177 | { | |
fb50ef08 | 178 | char *dst = scm_malloc (n + 1); |
c7743d02 HWN |
179 | memcpy (dst, str, n); |
180 | dst[n] = 0; | |
181 | return dst; | |
182 | } | |
183 | ||
184 | char * | |
185 | scm_strdup (const char *str) | |
186 | { | |
187 | return scm_strndup (str, strlen (str)); | |
188 | } | |
189 | ||
b17e0ac3 | 190 | |
cbfe8e62 HWN |
191 | |
192 | void | |
193 | scm_gc_register_collectable_memory (void *mem, size_t size, const char *what) | |
194 | { | |
76f3ee77 AW |
195 | scm_gc_register_allocation (size); |
196 | ||
c7743d02 HWN |
197 | #ifdef GUILE_DEBUG_MALLOC |
198 | if (mem) | |
8fc5ef7d | 199 | scm_malloc_register (mem, what); |
c7743d02 HWN |
200 | #endif |
201 | } | |
202 | ||
cbfe8e62 | 203 | |
c7743d02 HWN |
204 | void |
205 | scm_gc_unregister_collectable_memory (void *mem, size_t size, const char *what) | |
206 | { | |
c5018a2b | 207 | /* Nothing to do. */ |
c7743d02 HWN |
208 | #ifdef GUILE_DEBUG_MALLOC |
209 | if (mem) | |
210 | scm_malloc_unregister (mem); | |
211 | #endif | |
212 | } | |
213 | ||
3ef6650d AW |
214 | /* Allocate SIZE bytes of memory whose contents should not be scanned |
215 | for pointers (useful, e.g., for strings). Note though that this | |
216 | memory is *not* cleared; be sure to initialize it to prevent | |
217 | information leaks. */ | |
c5018a2b LC |
218 | void * |
219 | scm_gc_malloc_pointerless (size_t size, const char *what) | |
220 | { | |
817307cc | 221 | return do_gc_malloc_atomic (size, what); |
c5018a2b LC |
222 | } |
223 | ||
c7743d02 HWN |
224 | void * |
225 | scm_gc_malloc (size_t size, const char *what) | |
226 | { | |
817307cc | 227 | return do_gc_malloc (size, what); |
c7743d02 HWN |
228 | } |
229 | ||
39e8f371 HWN |
230 | void * |
231 | scm_gc_calloc (size_t size, const char *what) | |
232 | { | |
b1f6293e | 233 | /* `GC_MALLOC ()' always returns a zeroed buffer. */ |
817307cc | 234 | return do_gc_malloc (size, what); |
39e8f371 HWN |
235 | } |
236 | ||
c7743d02 HWN |
237 | void * |
238 | scm_gc_realloc (void *mem, size_t old_size, size_t new_size, const char *what) | |
239 | { | |
817307cc | 240 | return do_gc_realloc (mem, new_size, what); |
c7743d02 HWN |
241 | } |
242 | ||
243 | void | |
244 | scm_gc_free (void *mem, size_t size, const char *what) | |
245 | { | |
817307cc | 246 | do_gc_free (mem); |
c7743d02 HWN |
247 | } |
248 | ||
249 | char * | |
250 | scm_gc_strndup (const char *str, size_t n, const char *what) | |
251 | { | |
817307cc | 252 | char *dst = do_gc_malloc_atomic (n + 1, what); |
c7743d02 HWN |
253 | memcpy (dst, str, n); |
254 | dst[n] = 0; | |
255 | return dst; | |
256 | } | |
257 | ||
258 | char * | |
259 | scm_gc_strdup (const char *str, const char *what) | |
260 | { | |
261 | return scm_gc_strndup (str, strlen (str), what); | |
262 | } |