1/* Copyright (C) 2005-2024 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 <stdio.h>
20#include <stdlib.h>
21#include <libc-diag.h>
22
23#include "tst-malloc-aux.h"
24
25static int errors = 0;
26
27static void
28merror (const char *msg)
29{
30 ++errors;
31 printf (format: "Error: %s\n", msg);
32}
33
34static int
35do_test (void)
36{
37 void *p, *q;
38
39 errno = 0;
40
41 DIAG_PUSH_NEEDS_COMMENT;
42#if __GNUC_PREREQ (7, 0)
43 /* GCC 7 warns about too-large allocations; here we want to test
44 that they fail. */
45 DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
46#endif
47 p = malloc (-1);
48 DIAG_POP_NEEDS_COMMENT;
49
50 if (p != NULL)
51 merror (msg: "malloc (-1) succeeded.");
52 else if (errno != ENOMEM)
53 merror (msg: "errno is not set correctly.");
54
55 p = malloc (10);
56 if (p == NULL)
57 merror (msg: "malloc (10) failed.");
58
59 p = realloc (p, 0);
60 if (p != NULL)
61 merror (msg: "realloc (p, 0) failed.");
62
63 p = malloc (0);
64 if (p == NULL)
65 merror (msg: "malloc (0) failed.");
66
67 p = realloc (p, 0);
68 if (p != NULL)
69 merror (msg: "realloc (p, 0) failed.");
70
71 q = malloc (256);
72 if (q == NULL)
73 merror (msg: "malloc (256) failed.");
74
75 p = malloc (512);
76 if (p == NULL)
77 merror (msg: "malloc (512) failed.");
78
79 DIAG_PUSH_NEEDS_COMMENT;
80#if __GNUC_PREREQ (7, 0)
81 /* GCC 7 warns about too-large allocations; here we want to test
82 that they fail. */
83 DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
84#endif
85 if (realloc (p, -256) != NULL)
86 merror (msg: "realloc (p, -256) succeeded.");
87 else if (errno != ENOMEM)
88 merror (msg: "errno is not set correctly.");
89 DIAG_POP_NEEDS_COMMENT;
90
91#if __GNUC_PREREQ (12, 0)
92 /* Ignore a valid warning about using a pointer made indeterminate
93 by a prior call to realloc(). */
94 DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
95#endif
96 free (ptr: p);
97#if __GNUC_PREREQ (12, 0)
98 DIAG_POP_NEEDS_COMMENT;
99#endif
100
101 p = malloc (512);
102 if (p == NULL)
103 merror (msg: "malloc (512) failed.");
104
105 DIAG_PUSH_NEEDS_COMMENT;
106#if __GNUC_PREREQ (7, 0)
107 /* GCC 7 warns about too-large allocations; here we want to test
108 that they fail. */
109 DIAG_IGNORE_NEEDS_COMMENT (7, "-Walloc-size-larger-than=");
110#endif
111 if (realloc (p, -1) != NULL)
112 merror (msg: "realloc (p, -1) succeeded.");
113 else if (errno != ENOMEM)
114 merror (msg: "errno is not set correctly.");
115 DIAG_POP_NEEDS_COMMENT;
116
117#if __GNUC_PREREQ (12, 0)
118 /* Ignore a valid warning about using a pointer made indeterminate
119 by a prior call to realloc(). */
120 DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
121#endif
122 free (ptr: p);
123#if __GNUC_PREREQ (12, 0)
124 DIAG_POP_NEEDS_COMMENT;
125#endif
126 free (ptr: q);
127
128 return errors != 0;
129}
130
131#define TEST_FUNCTION do_test ()
132#include "../test-skeleton.c"
133

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