Commit | Line | Data |
---|---|---|
0822ee4a CM |
1 | /* |
2 | * mm/kmemleak-test.c | |
3 | * | |
4 | * Copyright (C) 2008 ARM Limited | |
5 | * Written by Catalin Marinas <catalin.marinas@arm.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | #include <linux/init.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/vmalloc.h> | |
26 | #include <linux/list.h> | |
27 | #include <linux/percpu.h> | |
28 | #include <linux/fdtable.h> | |
29 | ||
30 | #include <linux/kmemleak.h> | |
31 | ||
32 | struct test_node { | |
33 | long header[25]; | |
34 | struct list_head list; | |
35 | long footer[25]; | |
36 | }; | |
37 | ||
38 | static LIST_HEAD(test_list); | |
245b2e70 | 39 | static DEFINE_PER_CPU(void *, kmemleak_test_pointer); |
0822ee4a CM |
40 | |
41 | /* | |
42 | * Some very simple testing. This function needs to be extended for | |
43 | * proper testing. | |
44 | */ | |
45 | static int __init kmemleak_test_init(void) | |
46 | { | |
47 | struct test_node *elem; | |
48 | int i; | |
49 | ||
50 | printk(KERN_INFO "Kmemleak testing\n"); | |
51 | ||
52 | /* make some orphan objects */ | |
53 | pr_info("kmemleak: kmalloc(32) = %p\n", kmalloc(32, GFP_KERNEL)); | |
54 | pr_info("kmemleak: kmalloc(32) = %p\n", kmalloc(32, GFP_KERNEL)); | |
55 | pr_info("kmemleak: kmalloc(1024) = %p\n", kmalloc(1024, GFP_KERNEL)); | |
56 | pr_info("kmemleak: kmalloc(1024) = %p\n", kmalloc(1024, GFP_KERNEL)); | |
57 | pr_info("kmemleak: kmalloc(2048) = %p\n", kmalloc(2048, GFP_KERNEL)); | |
58 | pr_info("kmemleak: kmalloc(2048) = %p\n", kmalloc(2048, GFP_KERNEL)); | |
59 | pr_info("kmemleak: kmalloc(4096) = %p\n", kmalloc(4096, GFP_KERNEL)); | |
60 | pr_info("kmemleak: kmalloc(4096) = %p\n", kmalloc(4096, GFP_KERNEL)); | |
61 | #ifndef CONFIG_MODULES | |
62 | pr_info("kmemleak: kmem_cache_alloc(files_cachep) = %p\n", | |
63 | kmem_cache_alloc(files_cachep, GFP_KERNEL)); | |
64 | pr_info("kmemleak: kmem_cache_alloc(files_cachep) = %p\n", | |
65 | kmem_cache_alloc(files_cachep, GFP_KERNEL)); | |
66 | #endif | |
67 | pr_info("kmemleak: vmalloc(64) = %p\n", vmalloc(64)); | |
68 | pr_info("kmemleak: vmalloc(64) = %p\n", vmalloc(64)); | |
69 | pr_info("kmemleak: vmalloc(64) = %p\n", vmalloc(64)); | |
70 | pr_info("kmemleak: vmalloc(64) = %p\n", vmalloc(64)); | |
71 | pr_info("kmemleak: vmalloc(64) = %p\n", vmalloc(64)); | |
72 | ||
73 | /* | |
74 | * Add elements to a list. They should only appear as orphan | |
75 | * after the module is removed. | |
76 | */ | |
77 | for (i = 0; i < 10; i++) { | |
78 | elem = kmalloc(sizeof(*elem), GFP_KERNEL); | |
79 | pr_info("kmemleak: kmalloc(sizeof(*elem)) = %p\n", elem); | |
80 | if (!elem) | |
81 | return -ENOMEM; | |
82 | memset(elem, 0, sizeof(*elem)); | |
83 | INIT_LIST_HEAD(&elem->list); | |
84 | ||
85 | list_add_tail(&elem->list, &test_list); | |
86 | } | |
87 | ||
88 | for_each_possible_cpu(i) { | |
245b2e70 | 89 | per_cpu(kmemleak_test_pointer, i) = kmalloc(129, GFP_KERNEL); |
0822ee4a | 90 | pr_info("kmemleak: kmalloc(129) = %p\n", |
245b2e70 | 91 | per_cpu(kmemleak_test_pointer, i)); |
0822ee4a CM |
92 | } |
93 | ||
94 | return 0; | |
95 | } | |
96 | module_init(kmemleak_test_init); | |
97 | ||
98 | static void __exit kmemleak_test_exit(void) | |
99 | { | |
100 | struct test_node *elem, *tmp; | |
101 | ||
102 | /* | |
103 | * Remove the list elements without actually freeing the | |
104 | * memory. | |
105 | */ | |
106 | list_for_each_entry_safe(elem, tmp, &test_list, list) | |
107 | list_del(&elem->list); | |
108 | } | |
109 | module_exit(kmemleak_test_exit); | |
110 | ||
111 | MODULE_LICENSE("GPL"); |