about summary refs log tree commit diff
path: root/malloc/tst-malloc-check.c
blob: eb46cf3bbb6c5b4b646167cdc9d22814215c8a2a (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
/* Copyright (C) 2005-2022 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <libc-diag.h>

static int errors = 0;

static void
merror (const char *msg)
{
  ++errors;
  printf ("Error: %s\n", msg);
}

static int
do_test (void)
{
  void *p, *q;

  errno = 0;

  DIAG_PUSH_NEEDS_COMMENT;
#if __GNUC_PREREQ (7, 0)
  /* GCC 7 warns about too-large allocations; here we want to test
     that they fail.  */
  DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
#endif
  p = malloc (-1);
  DIAG_POP_NEEDS_COMMENT;

  if (p != NULL)
    merror ("malloc (-1) succeeded.");
  else if (errno != ENOMEM)
    merror ("errno is not set correctly.");

  p = malloc (10);
  if (p == NULL)
    merror ("malloc (10) failed.");

  p = realloc (p, 0);
  if (p != NULL)
    merror ("realloc (p, 0) failed.");

  p = malloc (0);
  if (p == NULL)
    merror ("malloc (0) failed.");

  p = realloc (p, 0);
  if (p != NULL)
    merror ("realloc (p, 0) failed.");

  q = malloc (256);
  if (q == NULL)
    merror ("malloc (256) failed.");

  p = malloc (512);
  if (p == NULL)
    merror ("malloc (512) failed.");

  DIAG_PUSH_NEEDS_COMMENT;
#if __GNUC_PREREQ (7, 0)
  /* GCC 7 warns about too-large allocations; here we want to test
     that they fail.  */
  DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
#endif
  if (realloc (p, -256) != NULL)
    merror ("realloc (p, -256) succeeded.");
  else if (errno != ENOMEM)
    merror ("errno is not set correctly.");
  DIAG_POP_NEEDS_COMMENT;

#if __GNUC_PREREQ (12, 0)
  /* Ignore a valid warning about using a pointer made indeterminate
     by a prior call to realloc().  */
  DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
#endif
  free (p);
#if __GNUC_PREREQ (12, 0)
  DIAG_POP_NEEDS_COMMENT;
#endif

  p = malloc (512);
  if (p == NULL)
    merror ("malloc (512) failed.");

  DIAG_PUSH_NEEDS_COMMENT;
#if __GNUC_PREREQ (7, 0)
  /* GCC 7 warns about too-large allocations; here we want to test
     that they fail.  */
  DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
#endif
  if (realloc (p, -1) != NULL)
    merror ("realloc (p, -1) succeeded.");
  else if (errno != ENOMEM)
    merror ("errno is not set correctly.");
  DIAG_POP_NEEDS_COMMENT;

#if __GNUC_PREREQ (12, 0)
  /* Ignore a valid warning about using a pointer made indeterminate
     by a prior call to realloc().  */
  DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
#endif
  free (p);
#if __GNUC_PREREQ (12, 0)
  DIAG_POP_NEEDS_COMMENT;
#endif
  free (q);

  return errors != 0;
}

#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"