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
|
/* Test program for mtrace.
Copyright (C) 2000 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
<http://www.gnu.org/licenses/>. */
#include <mcheck.h>
#include <paths.h>
#include <search.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static void print (const void *node, VISIT value, int level);
/* Used for several purposes. */
static FILE *fp;
int
main (void)
{
void *root = NULL;
size_t linelen = 0;
char *line = NULL;
/* Enable memory usage tracing. */
mtrace ();
/* Perform some operations which definitely will allocate some
memory. */
fp = fopen (__FILE__, "r");
if (fp == NULL)
/* Shouldn't happen since this program is executed in the source
directory. */
abort ();
while (!feof (fp))
{
char **p;
char *copy;
ssize_t n = getline (&line, &linelen, fp);
if (n < 0)
break;
if (n == 0)
continue;
copy = strdup (line);
if (copy == NULL)
abort ();
p = (char **) tsearch (copy, &root,
(int (*) (const void *, const void *)) strcmp);
if (*p != copy)
/* This line wasn't added. */
free (copy);
}
fclose (fp);
fp = fopen (_PATH_DEVNULL, "w");
if (fp != NULL)
{
/* Write something through stdout. */
twalk (root, print);
fclose (fp);
}
/* Free everything. */
tdestroy (root, free);
/* Also the line buffer. */
free (line);
/* That's it. */
return 0;
}
static void
print (const void *node, VISIT value, int level)
{
static int cnt;
if (value == postorder || value == leaf)
fprintf (fp, "%3d: %s", ++cnt, *(const char **) node);
}
|
