1/* Copyright (C) 1999-2024 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <malloc.h>
20#include <stdio.h>
21#include <libc-diag.h>
22
23static int errors = 0;
24
25static void
26merror (const char *msg)
27{
28 ++errors;
29 printf (format: "Error: %s\n", msg);
30}
31
32static int
33do_test (void)
34{
35 void *p, *q;
36 int save;
37
38 errno = 0;
39
40 DIAG_PUSH_NEEDS_COMMENT;
41#if __GNUC_PREREQ (7, 0)
42 /* GCC 7 warns about too-large allocations; here we want to test
43 that they fail. */
44 DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
45#endif
46 p = malloc (size: -1);
47 DIAG_POP_NEEDS_COMMENT;
48 save = errno;
49
50 if (p != NULL)
51 merror (msg: "malloc (-1) succeeded.");
52
53 if (p == NULL && save != ENOMEM)
54 merror (msg: "errno is not set correctly");
55
56 p = malloc (size: 10);
57 if (p == NULL)
58 merror (msg: "malloc (10) failed.");
59
60 /* realloc (p, 0) == free (p). */
61 p = realloc (ptr: p, size: 0);
62 if (p != NULL)
63 merror (msg: "realloc (p, 0) failed.");
64
65 p = malloc (size: 0);
66 if (p == NULL)
67 merror (msg: "malloc (0) failed.");
68
69 p = realloc (ptr: p, size: 0);
70 if (p != NULL)
71 merror (msg: "realloc (p, 0) failed.");
72
73 p = malloc (size: 513 * 1024);
74 if (p == NULL)
75 merror (msg: "malloc (513K) failed.");
76
77 DIAG_PUSH_NEEDS_COMMENT;
78#if __GNUC_PREREQ (7, 0)
79 /* GCC 7 warns about too-large allocations; here we want to test
80 that they fail. */
81 DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
82#endif
83 q = malloc (size: -512 * 1024);
84 DIAG_POP_NEEDS_COMMENT;
85 if (q != NULL)
86 merror (msg: "malloc (-512K) succeeded.");
87
88 free (ptr: p);
89
90 return errors != 0;
91}
92
93#define TEST_FUNCTION do_test ()
94#include "../test-skeleton.c"
95

source code of glibc/malloc/tst-malloc.c