GNUnet  0.11.x
common_allocation.c
Go to the documentation of this file.
1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2001, 2002, 2003, 2005, 2006 GNUnet e.V.
4 
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.
9 
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.
14 
15  You should have received a copy of the GNU Affero General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>.
17 
18  SPDX-License-Identifier: AGPL3.0-or-later
19  */
20 
26 #include "platform.h"
27 #include "gnunet_crypto_lib.h"
28 #if HAVE_MALLOC_H
29 #include <malloc.h>
30 #endif
31 #if HAVE_MALLOC_MALLOC_H
32 #include <malloc/malloc.h>
33 #endif
34 
35 #define LOG(kind, ...) \
36  GNUNET_log_from (kind, "util-common-allocation", __VA_ARGS__)
37 
38 #define LOG_STRERROR(kind, syscall) \
39  GNUNET_log_from_strerror (kind, "util-common-allocation", syscall)
40 
41 #ifndef INT_MAX
42 #define INT_MAX 0x7FFFFFFF
43 #endif
44 
45 #if 0
46 #define W32_MEM_LIMIT 200000000
47 #endif
48 
49 #ifdef W32_MEM_LIMIT
50 static LONG mem_used = 0;
51 #endif
52 
65 void *
66 GNUNET_xmalloc_ (size_t size, const char *filename, int linenumber)
67 {
68  void *ret;
69 
70  /* As a security precaution, we generally do not allow very large
71  * allocations using the default 'GNUNET_malloc()' macro */
72  GNUNET_assert_at (size <= GNUNET_MAX_MALLOC_CHECKED, filename, linenumber);
73  ret = GNUNET_xmalloc_unchecked_ (size, filename, linenumber);
74  if (NULL == ret)
75  {
77  GNUNET_assert (0);
78  }
79  return ret;
80 }
81 
82 
97 void **
99  size_t m,
100  size_t elementSize,
101  const char *filename,
102  int linenumber)
103 {
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,
108  linenumber);
109 
110  for (size_t i = 0; i < n; i++)
111  ret[i] = (char *) ret /* base address */
112  + n * sizeof(void *) /* skip 1. dim header */
113  + i * m * elementSize; /* skip to 2. dim row header */
114  return (void **) ret;
115 }
116 
117 
133 void ***
135  size_t m,
136  size_t o,
137  size_t elementSize,
138  const char *filename,
139  int linenumber)
140 {
141  /* use char pointer internally to avoid void pointer arithmetic warnings */
142  char ***ret = GNUNET_xmalloc_ (n * sizeof(void **) /* 1. dim header */
143  + n * m * sizeof(void *) /* 2. dim header */
144  + n * m * o * elementSize, /* element data */
145  filename,
146  linenumber);
147 
148  for (size_t i = 0; i < n; i++)
149  {
150  /* need to cast to (char *) temporarily for byte level acuracy */
151  ret[i] = (char **) ((char *) ret /* base address */
152  + n * sizeof(void **) /* skip 1. dim header */
153  + i * m * sizeof(void *)); /* skip to 2. dim header */
154  for (size_t j = 0; j < m; j++)
155  ret[i][j] = (char *) ret /* base address */
156  + n * sizeof(void **) /* skip 1. dim header */
157  + n * m * sizeof(void *) /* skip 2. dim header */
158  + i * m * o * elementSize /* skip to 2. dim part */
159  + j * o * elementSize; /* skip to 3. dim row data */
160  }
161  return (void ***) ret;
162 }
163 
164 
176 void *
177 GNUNET_xmemdup_ (const void *buf,
178  size_t size,
179  const char *filename,
180  int linenumber)
181 {
182  void *ret;
183 
184  /* As a security precaution, we generally do not allow very large
185  * allocations here */
186  GNUNET_assert_at (size <= GNUNET_MAX_MALLOC_CHECKED, filename, linenumber);
187 #ifdef W32_MEM_LIMIT
188  size += sizeof(size_t);
189  if (mem_used + size > W32_MEM_LIMIT)
190  return NULL;
191 #endif
192  GNUNET_assert_at (size < INT_MAX, filename, linenumber);
193  ret = malloc (size);
194  if (ret == NULL)
195  {
197  GNUNET_assert (0);
198  }
199 #ifdef W32_MEM_LIMIT
200  *((size_t *) ret) = size;
201  ret = &((size_t *) ret)[1];
202  mem_used += size;
203 #endif
204  GNUNET_memcpy (ret, buf, size);
205  return ret;
206 }
207 
208 
218 void *
219 GNUNET_xmalloc_unchecked_ (size_t size, const char *filename, int linenumber)
220 {
221  void *result;
222 
223  (void) filename;
224  (void) linenumber;
225 #ifdef W32_MEM_LIMIT
226  size += sizeof(size_t);
227  if (mem_used + size > W32_MEM_LIMIT)
228  return NULL;
229 #endif
230 
231  result = malloc (size);
232  if (NULL == result)
233  return NULL;
234  memset (result, 0, size);
235 
236 #ifdef W32_MEM_LIMIT
237  *((size_t *) result) = size;
238  result = &((size_t *) result)[1];
239  mem_used += size;
240 #endif
241 
242  return result;
243 }
244 
245 
257 void *
258 GNUNET_xrealloc_ (void *ptr, size_t n, const char *filename, int linenumber)
259 {
260  (void) filename;
261  (void) linenumber;
262 
263 #ifdef W32_MEM_LIMIT
264  n += sizeof(size_t);
265  ptr = &((size_t *) ptr)[-1];
266  mem_used = mem_used - *((size_t *) ptr) + n;
267 #endif
268  ptr = realloc (ptr, n);
269  if ((NULL == ptr) && (n > 0))
270  {
272  GNUNET_assert (0);
273  }
274 #ifdef W32_MEM_LIMIT
275  ptr = &((size_t *) ptr)[1];
276 #endif
277  return ptr;
278 }
279 
280 
281 #if __BYTE_ORDER == __LITTLE_ENDIAN
282 #define BAADFOOD_STR "\x0D\xF0\xAD\xBA"
283 #endif
284 #if __BYTE_ORDER == __BIG_ENDIAN
285 #define BAADFOOD_STR "\xBA\xAD\xF0\x0D"
286 #endif
287 
288 #if HAVE_MALLOC_NP_H
289 #include <malloc_np.h>
290 #endif
291 #if HAVE_MALLOC_USABLE_SIZE
292 #define M_SIZE(p) malloc_usable_size (p)
293 #elif HAVE_MALLOC_SIZE
294 #define M_SIZE(p) malloc_size (p)
295 #endif
296 
305 void
306 GNUNET_xfree_ (void *ptr, const char *filename, int linenumber)
307 {
308  GNUNET_assert_at (NULL != ptr, filename, linenumber);
309 #ifdef W32_MEM_LIMIT
310  ptr = &((size_t *) ptr)[-1];
311  mem_used -= *((size_t *) ptr);
312 #endif
313 #if defined(M_SIZE)
314 #if ENABLE_POISONING
315  {
316  const uint64_t baadfood = GNUNET_ntohll (0xBAADF00DBAADF00DLL);
317  uint64_t *base = ptr;
318  size_t s = M_SIZE (ptr);
319  size_t i;
320 
321  for (i = 0; i < s / 8; i++)
322  base[i] = baadfood;
323  GNUNET_memcpy (&base[s / 8], &baadfood, s % 8);
324  }
325 #endif
326 #endif
327  free (ptr);
328 }
329 
330 
339 char *
340 GNUNET_xstrdup_ (const char *str, const char *filename, int linenumber)
341 {
342  char *res;
343  size_t slen;
344 
345  GNUNET_assert_at (str != NULL, filename, linenumber);
346  slen = strlen (str) + 1;
347  res = GNUNET_xmalloc_ (slen, filename, linenumber);
348  GNUNET_memcpy (res, str, slen);
349  return res;
350 }
351 
352 
353 #if ! HAVE_STRNLEN
354 static size_t
355 strnlen (const char *s, size_t n)
356 {
357  const char *e;
358 
359  e = memchr (s, '\0', n);
360  if (NULL == e)
361  return n;
362  return e - s;
363 }
364 
365 
366 #endif
367 
368 
378 char *
379 GNUNET_xstrndup_ (const char *str,
380  size_t len,
381  const char *filename,
382  int linenumber)
383 {
384  char *res;
385 
386  if (0 == len)
387  return GNUNET_strdup ("");
388  GNUNET_assert_at (NULL != str, filename, linenumber);
389  len = strnlen (str, len);
390  res = GNUNET_xmalloc_ (len + 1, filename, linenumber);
391  GNUNET_memcpy (res, str, len);
392  /* res[len] = '\0'; 'malloc' zeros out anyway */
393  return res;
394 }
395 
396 
409 void
410 GNUNET_xgrow_ (void **old,
411  size_t elementSize,
412  unsigned int *oldCount,
413  unsigned int newCount,
414  const char *filename,
415  int linenumber)
416 {
417  void *tmp;
418  size_t size;
419 
420  GNUNET_assert_at (INT_MAX / elementSize > newCount, filename, linenumber);
421  size = newCount * elementSize;
422  if (0 == size)
423  {
424  tmp = NULL;
425  }
426  else
427  {
428  tmp = GNUNET_xmalloc_ (size, filename, linenumber);
429  if (NULL != *old)
430  {
431  GNUNET_memcpy (tmp, *old, elementSize * GNUNET_MIN (*oldCount, newCount));
432  }
433  }
434 
435  if (NULL != *old)
436  {
437  GNUNET_xfree_ (*old, filename, linenumber);
438  }
439  *old = tmp;
440  *oldCount = newCount;
441 }
442 
443 
452 int
453 GNUNET_asprintf (char **buf, const char *format, ...)
454 {
455  int ret;
456  va_list args;
457 
458  va_start (args, format);
459  ret = vsnprintf (NULL, 0, format, args);
460  va_end (args);
461  GNUNET_assert (ret >= 0);
462  *buf = GNUNET_malloc (ret + 1);
463  va_start (args, format);
464  ret = vsprintf (*buf, format, args);
465  va_end (args);
466  return ret;
467 }
468 
469 
479 int
480 GNUNET_snprintf (char *buf, size_t size, const char *format, ...)
481 {
482  int ret;
483  va_list args;
484 
485  va_start (args, format);
486  ret = vsnprintf (buf, size, format, args);
487  va_end (args);
488  GNUNET_assert ((ret >= 0) && (((size_t) ret) < size));
489  return ret;
490 }
491 
492 
499 struct GNUNET_MessageHeader *
501 {
502  struct GNUNET_MessageHeader *ret;
503  uint16_t msize;
504 
505  msize = ntohs (msg->size);
506  GNUNET_assert (msize >= sizeof(struct GNUNET_MessageHeader));
507  ret = GNUNET_malloc (msize);
508  GNUNET_memcpy (ret, msg, msize);
509  return ret;
510 }
511 
512 
513 /* end of common_allocation.c */
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
int GNUNET_snprintf(char *buf, size_t size, const char *format,...)
Like snprintf(), just aborts if the buffer is of insufficient size.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
static int ret
Return value of the commandline.
Definition: gnunet-abd.c:81
static struct Experiment * e
char * GNUNET_xstrndup_(const char *str, size_t len, const char *filename, int linenumber)
Dup partially a string (same semantics as strndup).
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
void * GNUNET_xmalloc_(size_t size, const char *filename, int linenumber)
Allocate memory.
static struct GNUNET_ARM_MonitorHandle * m
Monitor connection with ARM.
Definition: gnunet-arm.c:104
#define INT_MAX
char * GNUNET_xstrdup_(const char *str, const char *filename, int linenumber)
Dup a string (same semantics as strdup).
cryptographic primitives for GNUnet
int GNUNET_asprintf(char **buf, const char *format,...)
Like asprintf(), just portable.
void * GNUNET_xrealloc_(void *ptr, size_t n, const char *filename, int linenumber)
Reallocate memory.
#define GNUNET_MIN(a, b)
Definition: gnunet_common.h:80
static char buf[2048]
void GNUNET_xfree_(void *ptr, const char *filename, int linenumber)
Free memory.
static char * filename
static int result
Global testing status.
#define LOG_STRERROR(kind, syscall)
void * GNUNET_xmalloc_unchecked_(size_t size, const char *filename, int linenumber)
Wrapper around malloc().
void ** GNUNET_xnew_array_2d_(size_t n, size_t m, size_t elementSize, const char *filename, int linenumber)
Allocate memory for a two dimensional array in one block and set up pointers.
static int res
void * GNUNET_xmemdup_(const void *buf, size_t size, const char *filename, int linenumber)
Allocate and initialize memory.
static unsigned int size
Size of the "table".
Definition: peer.c:67
#define GNUNET_MAX_MALLOC_CHECKED
Maximum allocation with GNUNET_malloc macro.
#define GNUNET_assert_at(cond, f, l)
Use this for fatal errors that cannot be handled.
void *** GNUNET_xnew_array_3d_(size_t n, size_t m, size_t o, size_t elementSize, const char *filename, int linenumber)
Allocate memory for a three dimensional array in one block and set up pointers.
Header for all communications.
static size_t strnlen(const char *s, size_t n)
#define GNUNET_malloc(size)
Wrapper around malloc.
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:48
void GNUNET_xgrow_(void **old, size_t elementSize, unsigned int *oldCount, unsigned int newCount, const char *filename, int linenumber)
Grow an array.
struct GNUNET_MessageHeader * GNUNET_copy_message(const struct GNUNET_MessageHeader *msg)
Create a copy of the given message.
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...