aboutsummaryrefslogtreecommitdiff
path: root/vendor/gmp-6.3.0/tests/memory.c
blob: 4ab54b77034a7a10f883a819feff68068421bd92 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
/* Memory allocation used during tests.

Copyright 2001, 2002, 2007, 2013 Free Software Foundation, Inc.

This file is part of the GNU MP Library test suite.

The GNU MP Library test suite is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.

The GNU MP Library test suite is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
Public License for more details.

You should have received a copy of the GNU General Public License along with
the GNU MP Library test suite.  If not, see https://www.gnu.org/licenses/.  */

#include <stdio.h>
#include <stdlib.h>		/* for abort */
#include <string.h>		/* for memcpy, memcmp */
#include "gmp-impl.h"
#include "tests.h"

#if GMP_LIMB_BITS == 64
#define PATTERN1 CNST_LIMB(0xcafebabedeadbeef)
#define PATTERN2 CNST_LIMB(0xabacadabaedeedab)
#else
#define PATTERN1 CNST_LIMB(0xcafebabe)
#define PATTERN2 CNST_LIMB(0xdeadbeef)
#endif

#if HAVE_INTPTR_T
#define PTRLIMB(p)  ((mp_limb_t) (intptr_t) p)
#else
#define PTRLIMB(p)  ((mp_limb_t) (size_t) p)
#endif

/* Each block allocated is a separate malloc, for the benefit of a redzoning
   malloc debugger during development or when bug hunting.

   Sizes passed when reallocating or freeing are checked (the default
   routines don't care about these).

   Memory leaks are checked by requiring that all blocks have been freed
   when tests_memory_end() is called.  Test programs must be sure to have
   "clear"s for all temporary variables used.  */


struct header {
  void           *ptr;
  size_t         size;
  struct header  *next;
};

struct header  *tests_memory_list = NULL;

/* Return a pointer to a pointer to the found block (so it can be updated
   when unlinking). */
struct header **
tests_memory_find (void *ptr)
{
  struct header  **hp;

  for (hp = &tests_memory_list; *hp != NULL; hp = &((*hp)->next))
    if ((*hp)->ptr == ptr)
      return hp;

  return NULL;
}

int
tests_memory_valid (void *ptr)
{
  return (tests_memory_find (ptr) != NULL);
}

void *
tests_allocate (size_t size)
{
  struct header  *h;
  void *rptr, *ptr;
  mp_limb_t PATTERN2_var;

  if (size == 0)
    {
      fprintf (stderr, "tests_allocate(): attempt to allocate 0 bytes\n");
      abort ();
    }

  h = (struct header *) __gmp_default_allocate (sizeof (*h));
  h->next = tests_memory_list;
  tests_memory_list = h;

  rptr = __gmp_default_allocate (size + 2 * sizeof (mp_limb_t));
  ptr = (void *) ((gmp_intptr_t) rptr + sizeof (mp_limb_t));

  *((mp_limb_t *) ((gmp_intptr_t) ptr - sizeof (mp_limb_t)))
    = PATTERN1 - PTRLIMB (ptr);
  PATTERN2_var = PATTERN2 - PTRLIMB (ptr);
  memcpy ((void *) ((gmp_intptr_t) ptr + size), &PATTERN2_var, sizeof (mp_limb_t));

  h->size = size;
  h->ptr = ptr;
  return h->ptr;
}

void *
tests_reallocate (void *ptr, size_t old_size, size_t new_size)
{
  struct header  **hp, *h;
  void *rptr;
  mp_limb_t PATTERN2_var;

  if (new_size == 0)
    {
      fprintf (stderr, "tests_reallocate(): attempt to reallocate %p to 0 bytes\n",
	       ptr);
      abort ();
    }

  hp = tests_memory_find (ptr);
  if (hp == NULL)
    {
      fprintf (stderr, "tests_reallocate(): attempt to reallocate bad pointer %p\n",
	       ptr);
      abort ();
    }
  h = *hp;

  if (h->size != old_size)
    {
      fprintf (stderr, "tests_reallocate(): bad old size %lu, should be %lu\n",
	       (unsigned long) old_size, (unsigned long) h->size);
      abort ();
    }

  if (*((mp_limb_t *) ((gmp_intptr_t) ptr - sizeof (mp_limb_t)))
      != PATTERN1 - PTRLIMB (ptr))
    {
      fprintf (stderr, "in realloc: redzone clobbered before block\n");
      abort ();
    }
  PATTERN2_var = PATTERN2 - PTRLIMB (ptr);
  if (memcmp ((void *) ((gmp_intptr_t) ptr + h->size), &PATTERN2_var, sizeof (mp_limb_t)))
    {
      fprintf (stderr, "in realloc: redzone clobbered after block\n");
      abort ();
    }

  rptr = __gmp_default_reallocate ((void *) ((gmp_intptr_t) ptr - sizeof (mp_limb_t)),
				 old_size + 2 * sizeof (mp_limb_t),
				 new_size + 2 * sizeof (mp_limb_t));
  ptr = (void *) ((gmp_intptr_t) rptr + sizeof (mp_limb_t));

  *((mp_limb_t *) ((gmp_intptr_t) ptr - sizeof (mp_limb_t)))
    = PATTERN1 - PTRLIMB (ptr);
  PATTERN2_var = PATTERN2 - PTRLIMB (ptr);
  memcpy ((void *) ((gmp_intptr_t) ptr + new_size), &PATTERN2_var, sizeof (mp_limb_t));

  h->size = new_size;
  h->ptr = ptr;
  return h->ptr;
}

struct header **
tests_free_find (void *ptr)
{
  struct header  **hp = tests_memory_find (ptr);
  if (hp == NULL)
    {
      fprintf (stderr, "tests_free(): attempt to free bad pointer %p\n",
	       ptr);
      abort ();
    }
  return hp;
}

void
tests_free_nosize (void *ptr)
{
  struct header  **hp = tests_free_find (ptr);
  struct header  *h = *hp;
  mp_limb_t PATTERN2_var;

  *hp = h->next;  /* unlink */

  if (*((mp_limb_t *) ((gmp_intptr_t) ptr - sizeof (mp_limb_t)))
      != PATTERN1 - PTRLIMB (ptr))
    {
      fprintf (stderr, "in free: redzone clobbered before block\n");
      abort ();
    }
  PATTERN2_var = PATTERN2 - PTRLIMB (ptr);
  if (memcmp ((void *) ((gmp_intptr_t) ptr + h->size), &PATTERN2_var, sizeof (mp_limb_t)))
    {
      fprintf (stderr, "in free: redzone clobbered after block\n");
      abort ();
    }

  __gmp_default_free ((void *) ((gmp_intptr_t) ptr - sizeof(mp_limb_t)),
		      h->size + 2 * sizeof (mp_limb_t));
  __gmp_default_free (h, sizeof (*h));
}

void
tests_free (void *ptr, size_t size)
{
  struct header  **hp = tests_free_find (ptr);
  struct header  *h = *hp;

  if (h->size != size)
    {
      fprintf (stderr, "tests_free(): bad size %lu, should be %lu\n",
	       (unsigned long) size, (unsigned long) h->size);
      abort ();
    }

  tests_free_nosize (ptr);
}

void
tests_memory_start (void)
{
  mp_set_memory_functions (tests_allocate, tests_reallocate, tests_free);
}

void
tests_memory_end (void)
{
  if (tests_memory_list != NULL)
    {
      struct header  *h;
      unsigned  count;

      fprintf (stderr, "tests_memory_end(): not all memory freed\n");

      count = 0;
      for (h = tests_memory_list; h != NULL; h = h->next)
	count++;

      fprintf (stderr, "    %u blocks remaining\n", count);
      abort ();
    }
}