// SPDX-License-Identifier: GPL-2.0-only
/*
* samples / kmemleak / kmemleak - test . c
*
* Copyright ( C ) 2008 ARM Limited
* Written by Catalin Marinas < catalin . marinas @ arm . com >
*/
#define pr_fmt(fmt) "kmemleak: " fmt
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/list.h>
#include <linux/percpu.h>
#include <linux/fdtable.h>
#include <linux/kmemleak.h>
struct test_node {
long header[25 ];
struct list_head list;
long footer[25 ];
};
static LIST_HEAD(test_list);
static DEFINE_PER_CPU(void *, kmemleak_test_pointer);
/*
* Some very simple testing . This function needs to be extended for
* proper testing .
*/
static int kmemleak_test_init(void )
{
struct test_node *elem;
int i;
pr_info("Kmemleak testing\n" );
/* make some orphan objects */
pr_info("kmalloc(32) = 0x%px\n" , kmalloc(32 , GFP_KERNEL));
pr_info("kmalloc(32) = 0x%px\n" , kmalloc(32 , GFP_KERNEL));
pr_info("kmalloc(1024) = 0x%px\n" , kmalloc(1024 , GFP_KERNEL));
pr_info("kmalloc(1024) = 0x%px\n" , kmalloc(1024 , GFP_KERNEL));
pr_info("kmalloc(2048) = 0x%px\n" , kmalloc(2048 , GFP_KERNEL));
pr_info("kmalloc(2048) = 0x%px\n" , kmalloc(2048 , GFP_KERNEL));
pr_info("kmalloc(4096) = 0x%px\n" , kmalloc(4096 , GFP_KERNEL));
pr_info("kmalloc(4096) = 0x%px\n" , kmalloc(4096 , GFP_KERNEL));
#ifndef CONFIG_MODULES
pr_info("kmem_cache_alloc(files_cachep) = 0x%px\n" ,
kmem_cache_alloc(files_cachep, GFP_KERNEL));
pr_info("kmem_cache_alloc(files_cachep) = 0x%px\n" ,
kmem_cache_alloc(files_cachep, GFP_KERNEL));
#endif
pr_info("vmalloc(64) = 0x%px\n" , vmalloc(64 ));
pr_info("vmalloc(64) = 0x%px\n" , vmalloc(64 ));
pr_info("vmalloc(64) = 0x%px\n" , vmalloc(64 ));
pr_info("vmalloc(64) = 0x%px\n" , vmalloc(64 ));
pr_info("vmalloc(64) = 0x%px\n" , vmalloc(64 ));
/*
* Add elements to a list . They should only appear as orphan
* after the module is removed .
*/
for (i = 0 ; i < 10 ; i++) {
elem = kzalloc(sizeof (*elem), GFP_KERNEL);
pr_info("kzalloc(sizeof(*elem)) = 0x%px\n" , elem);
if (!elem)
return -ENOMEM;
INIT_LIST_HEAD(&elem->list);
list_add_tail(&elem->list, &test_list);
}
for_each_possible_cpu(i) {
per_cpu(kmemleak_test_pointer, i) = kmalloc(129 , GFP_KERNEL);
pr_info("kmalloc(129) = 0x%px\n" ,
per_cpu(kmemleak_test_pointer, i));
}
pr_info("__alloc_percpu(64, 4) = 0x%px\n" , __alloc_percpu(64 , 4 ));
return 0 ;
}
module_init(kmemleak_test_init);
static void __exit kmemleak_test_exit(void )
{
struct test_node *elem, *tmp;
/*
* Remove the list elements without actually freeing the
* memory .
*/
list_for_each_entry_safe(elem, tmp, &test_list, list)
list_del(&elem->list);
}
module_exit(kmemleak_test_exit);
MODULE_DESCRIPTION("Sample module to leak memory for kmemleak testing" );
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=95 H=91 G=92
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-09-29)
¤
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