1 | /* Test program for mtrace. |
2 | Copyright (C) 2000-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <mcheck.h> |
20 | #include <paths.h> |
21 | #include <search.h> |
22 | #include <stdio.h> |
23 | #include <stdlib.h> |
24 | #include <string.h> |
25 | |
26 | |
27 | static void print (const void *node, VISIT value, int level); |
28 | |
29 | /* Used for several purposes. */ |
30 | static FILE *fp; |
31 | |
32 | |
33 | static int |
34 | do_test (void) |
35 | { |
36 | void *root = NULL; |
37 | size_t linelen = 0; |
38 | char *line = NULL; |
39 | |
40 | /* Enable memory usage tracing. */ |
41 | mtrace (); |
42 | |
43 | /* Perform some operations which definitely will allocate some |
44 | memory. */ |
45 | fp = fopen (__FILE__, "r" ); |
46 | if (fp == NULL) |
47 | /* Shouldn't happen since this program is executed in the source |
48 | directory. */ |
49 | abort (); |
50 | |
51 | while (!feof (stream: fp)) |
52 | { |
53 | char **p; |
54 | char *copy; |
55 | ssize_t n = getline (lineptr: &line, n: &linelen, stream: fp); |
56 | |
57 | if (n < 0) |
58 | break; |
59 | |
60 | if (n == 0) |
61 | continue; |
62 | |
63 | copy = strdup (s: line); |
64 | if (copy == NULL) |
65 | abort (); |
66 | |
67 | p = (char **) tsearch (key: copy, rootp: &root, |
68 | compar: (int (*)(const void *, const void *))strcmp); |
69 | if (*p != copy) |
70 | /* This line wasn't added. */ |
71 | free (ptr: copy); |
72 | } |
73 | |
74 | fclose (fp); |
75 | |
76 | fp = fopen (_PATH_DEVNULL, "w" ); |
77 | if (fp != NULL) |
78 | { |
79 | /* Write something through stdout. */ |
80 | twalk (root: root, action: print); |
81 | |
82 | fclose (fp); |
83 | } |
84 | |
85 | /* Free everything. */ |
86 | tdestroy (root: root, freefct: free); |
87 | |
88 | /* Also the line buffer. */ |
89 | free (ptr: line); |
90 | |
91 | /* That's it. */ |
92 | return 0; |
93 | } |
94 | |
95 | |
96 | static void |
97 | print (const void *node, VISIT value, int level) |
98 | { |
99 | static int cnt; |
100 | if (value == postorder || value == leaf) |
101 | fprintf (fp, "%3d: %s" , ++cnt, *(const char **) node); |
102 | } |
103 | |
104 | #define TEST_FUNCTION do_test () |
105 | #include "../test-skeleton.c" |
106 | |