2 This file is part of GNUnet.
3 Copyright (C) 2001, 2002, 2003, 2005, 2006 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
17 * @file util/common_allocation.c
18 * @brief wrapper around malloc/free
19 * @author Christian Grothoff
22 #include "gnunet_crypto_lib.h"
26 #if HAVE_MALLOC_MALLOC_H
27 #include <malloc/malloc.h>
30 #define LOG(kind,...) GNUNET_log_from (kind, "util-common-allocation",__VA_ARGS__)
32 #define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util-common-allocation", syscall)
35 #define INT_MAX 0x7FFFFFFF
39 #define W32_MEM_LIMIT 200000000
43 static LONG mem_used = 0;
47 * Allocate memory. Checks the return value, aborts if no more
48 * memory is available.
50 * @param size how many bytes of memory to allocate, do NOT use
51 * this function (or GNUNET_malloc()) to allocate more than several MB
52 * of memory, if you are possibly needing a very large chunk use
53 * #GNUNET_xmalloc_unchecked_() instead.
54 * @param filename where in the code was the call to GNUNET_malloc()
55 * @param linenumber where in the code was the call to GNUNET_malloc()
56 * @return pointer to size bytes of memory
59 GNUNET_xmalloc_ (size_t size,
65 /* As a security precaution, we generally do not allow very large
66 * allocations using the default 'GNUNET_malloc()' macro */
67 GNUNET_assert_at (size <= GNUNET_MAX_MALLOC_CHECKED,
70 ret = GNUNET_xmalloc_unchecked_ (size,
75 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR,
84 * Allocate memory for a two dimensional array in one block
85 * and set up pointers. Aborts if no more memory is available.
86 * Don't use GNUNET_xnew_array_2d_ directly. Use the
87 * #GNUNET_new_array_2d macro.
88 * The memory of the elements will be zero'ed out.
90 * @param n size of the first dimension
91 * @param m size of the second dimension
92 * @param elementSize size of a single element in bytes
93 * @param filename where is this call being made (for debugging)
94 * @param linenumber line where this call is being made (for debugging)
95 * @return allocated memory, never NULL
98 GNUNET_xnew_array_2d_ (size_t n,
101 const char *filename,
104 /* use char pointer internally to avoid void pointer arithmetic warnings */
105 char **ret = GNUNET_xmalloc_ (n * sizeof (void *) + /* 1. dim header */
106 n * m * elementSize, /* element data */
107 filename, linenumber);
109 for (size_t i = 0; i < n; i++)
110 ret[i] = (char *)ret + /* base address */
111 n * sizeof (void *) + /* skip 1. dim header */
112 i * m * elementSize; /* skip to 2. dim row header */
118 * Allocate memory for a three dimensional array in one block
119 * and set up pointers. Aborts if no more memory is available.
120 * Don't use GNUNET_xnew_array_3d_ directly. Use the
121 * #GNUNET_new_array_3d macro.
122 * The memory of the elements will be zero'ed out.
124 * @param n size of the first dimension
125 * @param m size of the second dimension
126 * @param o size of the third dimension
127 * @param elementSize size of a single element in bytes
128 * @param filename where is this call being made (for debugging)
129 * @param linenumber line where this call is being made (for debugging)
130 * @return allocated memory, never NULL
133 GNUNET_xnew_array_3d_ (size_t n, size_t m, size_t o, size_t elementSize,
134 const char *filename, int linenumber)
136 /* use char pointer internally to avoid void pointer arithmetic warnings */
137 char ***ret = GNUNET_xmalloc_ (n * sizeof (void **) + /* 1. dim header */
138 n * m * sizeof (void *) + /* 2. dim header */
139 n * m * o * elementSize, /* element data */
140 filename, linenumber);
142 for (size_t i = 0; i < n; i++)
144 /* need to cast to (char *) temporarily for byte level acuracy */
145 ret[i] = (char **)((char *)ret + /* base address */
146 n * sizeof (void **) + /* skip 1. dim header */
147 i * m * sizeof (void *)); /* skip to 2. dim header */
148 for (size_t j = 0; j < m; j++)
149 ret[i][j] = (char *)ret + /* base address */
150 n * sizeof (void **) + /* skip 1. dim header */
151 n * m * sizeof (void *) + /* skip 2. dim header */
152 i * m * o * elementSize + /* skip to 2. dim part */
153 j * o * elementSize; /* skip to 3. dim row data */
155 return (void ***)ret;
160 * Allocate and initialize memory. Checks the return value, aborts if no more
161 * memory is available. Don't use #GNUNET_xmemdup_() directly. Use the
162 * GNUNET_memdup() macro.
164 * @param buf buffer to initialize from (must contain size bytes)
165 * @param size number of bytes to allocate
166 * @param filename where is this call being made (for debugging)
167 * @param linenumber line where this call is being made (for debugging)
168 * @return allocated memory, never NULL
171 GNUNET_xmemdup_ (const void *buf,
173 const char *filename,
178 /* As a security precaution, we generally do not allow very large
179 * allocations here */
180 GNUNET_assert_at (size <= GNUNET_MAX_MALLOC_CHECKED, filename, linenumber);
182 size += sizeof (size_t);
183 if (mem_used + size > W32_MEM_LIMIT)
186 GNUNET_assert_at (size < INT_MAX, filename, linenumber);
190 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "malloc");
194 *((size_t *) ret) = size;
195 ret = &((size_t *) ret)[1];
198 GNUNET_memcpy (ret, buf, size);
204 * Wrapper around malloc(). Allocates size bytes of memory.
205 * The memory will be zero'ed out.
207 * @param size the number of bytes to allocate
208 * @param filename where in the code was the call to GNUNET_malloc_unchecked()
209 * @param linenumber where in the code was the call to GNUNET_malloc_unchecked()
210 * @return pointer to size bytes of memory, NULL if we do not have enough memory
213 GNUNET_xmalloc_unchecked_ (size_t size,
214 const char *filename,
222 size += sizeof (size_t);
223 if (mem_used + size > W32_MEM_LIMIT)
227 result = malloc (size);
230 memset (result, 0, size);
233 *((size_t *) result) = size;
234 result = &((size_t *) result)[1];
243 * Reallocate memory. Checks the return value, aborts if no more
244 * memory is available.
245 * The content of the intersection of the new and old size will be unchanged.
247 * @param ptr the pointer to reallocate
248 * @param n how many bytes of memory to allocate
249 * @param filename where in the code was the call to GNUNET_realloc()
250 * @param linenumber where in the code was the call to GNUNET_realloc()
251 * @return pointer to size bytes of memory
254 GNUNET_xrealloc_ (void *ptr,
256 const char *filename,
263 n += sizeof (size_t);
264 ptr = &((size_t *) ptr)[-1];
265 mem_used = mem_used - *((size_t *) ptr) + n;
267 ptr = realloc (ptr, n);
268 if ((NULL == ptr) && (n > 0))
270 LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR,
275 ptr = &((size_t *) ptr)[1];
281 # if __BYTE_ORDER == __LITTLE_ENDIAN
282 #define BAADFOOD_STR "\x0D\xF0\xAD\xBA"
284 # if __BYTE_ORDER == __BIG_ENDIAN
285 #define BAADFOOD_STR "\xBA\xAD\xF0\x0D"
289 #define M_SIZE(p) _msize (p)
292 #include <malloc_np.h>
294 #if HAVE_MALLOC_USABLE_SIZE
295 #define M_SIZE(p) malloc_usable_size (p)
296 #elif HAVE_MALLOC_SIZE
297 #define M_SIZE(p) malloc_size (p)
301 * Free memory. Merely a wrapper for the case that we
302 * want to keep track of allocations.
304 * @param ptr the pointer to free
305 * @param filename where in the code was the call to GNUNET_free
306 * @param linenumber where in the code was the call to GNUNET_free
309 GNUNET_xfree_ (void *ptr,
310 const char *filename,
313 GNUNET_assert_at (NULL != ptr,
317 ptr = &((size_t *) ptr)[-1];
318 mem_used -= *((size_t *) ptr);
323 const uint64_t baadfood = GNUNET_ntohll (0xBAADF00DBAADF00DLL);
324 uint64_t *base = ptr;
325 size_t s = M_SIZE (ptr);
330 GNUNET_memcpy (&base[s/8], &baadfood, s % 8);
339 * Dup a string (same semantics as strdup).
341 * @param str the string to dup
342 * @param filename where in the code was the call to GNUNET_strdup()
343 * @param linenumber where in the code was the call to GNUNET_strdup()
344 * @return `strdup(@a str)`
347 GNUNET_xstrdup_ (const char *str,
348 const char *filename,
354 GNUNET_assert_at (str != NULL,
357 slen = strlen (str) + 1;
358 res = GNUNET_xmalloc_ (slen,
370 strnlen (const char *s,
375 e = memchr (s, '\0', n);
384 * Dup partially a string (same semantics as strndup).
386 * @param str the string to dup
387 * @param len the length of the string to dup
388 * @param filename where in the code was the call to GNUNET_strndup()
389 * @param linenumber where in the code was the call to GNUNET_strndup()
390 * @return `strndup(@a str,@a len)`
393 GNUNET_xstrndup_ (const char *str,
395 const char *filename,
401 return GNUNET_strdup ("");
402 GNUNET_assert_at (NULL != str,
407 res = GNUNET_xmalloc_ (len + 1,
410 GNUNET_memcpy (res, str, len);
411 /* res[len] = '\0'; 'malloc' zeros out anyway */
417 * Grow an array. Grows old by (*oldCount-newCount)*elementSize bytes
418 * and sets *oldCount to newCount.
420 * @param old address of the pointer to the array
422 * @param elementSize the size of the elements of the array
423 * @param oldCount address of the number of elements in the *old array
424 * @param newCount number of elements in the new array, may be 0
425 * @param filename where in the code was the call to GNUNET_array_grow()
426 * @param linenumber where in the code was the call to GNUNET_array_grow()
429 GNUNET_xgrow_ (void **old,
431 unsigned int *oldCount,
432 unsigned int newCount,
433 const char *filename,
439 GNUNET_assert_at (INT_MAX / elementSize > newCount, filename, linenumber);
440 size = newCount * elementSize;
447 tmp = GNUNET_xmalloc_ (size, filename, linenumber);
450 GNUNET_memcpy (tmp, *old, elementSize * GNUNET_MIN(*oldCount, newCount));
456 GNUNET_xfree_ (*old, filename, linenumber);
459 *oldCount = newCount;
464 * Like asprintf(), just portable.
466 * @param buf set to a buffer of sufficient size (allocated, caller must free)
467 * @param format format string (see printf(), fprintf(), etc.)
468 * @param ... data for format string
469 * @return number of bytes in `*@a buf`, excluding 0-termination
472 GNUNET_asprintf (char **buf,
479 va_start (args, format);
480 ret = VSNPRINTF (NULL, 0, format, args);
482 GNUNET_assert (ret >= 0);
483 *buf = GNUNET_malloc (ret + 1);
484 va_start (args, format);
485 ret = VSPRINTF (*buf, format, args);
492 * Like snprintf(), just aborts if the buffer is of insufficient size.
494 * @param buf pointer to buffer that is written to
495 * @param size number of bytes in buf
496 * @param format format strings
497 * @param ... data for format string
498 * @return number of bytes written to buf or negative value on error
501 GNUNET_snprintf (char *buf,
503 const char *format, ...)
508 va_start (args, format);
509 ret = VSNPRINTF (buf,
514 GNUNET_assert ( (ret >= 0) &&
515 (((size_t) ret) < size) );
521 * Create a copy of the given message.
523 * @param msg message to copy
524 * @return duplicate of the message
526 struct GNUNET_MessageHeader *
527 GNUNET_copy_message (const struct GNUNET_MessageHeader *msg)
529 struct GNUNET_MessageHeader *ret;
532 msize = ntohs (msg->size);
533 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
534 ret = GNUNET_malloc (msize);
542 /* end of common_allocation.c */