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#define __NO_VERSION__
/*
* Memory allocation helpers.
*
* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sound/driver.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/info.h>
/*
* memory allocation helpers and debug routines
*/
struct snd_alloc_track {
unsigned long magic;
void *caller;
size_t size;
struct list_head list;
long data[0];
};
#define snd_alloc_track_entry(obj) (struct snd_alloc_track *)((char*)obj - (unsigned long)((struct snd_alloc_track *)0)->data)
static long snd_alloc_kmalloc;
static LIST_HEAD(snd_alloc_kmalloc_list);
static DEFINE_SPINLOCK(snd_alloc_kmalloc_lock);
#define KMALLOC_MAGIC 0x87654321
void snd_memory_done(void)
{
struct list_head *head;
struct snd_alloc_track *t;
if (snd_alloc_kmalloc > 0)
printk(KERN_ERR "snd: Not freed snd_alloc_kmalloc = %li\n", snd_alloc_kmalloc);
list_for_each_prev(head, &snd_alloc_kmalloc_list) {
t = list_entry(head, struct snd_alloc_track, list);
if (t->magic != KMALLOC_MAGIC) {
printk(KERN_ERR "snd: Corrupted kmalloc\n");
break;
}
printk(KERN_ERR "snd: kmalloc(%ld) from %p not freed\n", (long) t->size, t->caller);
}
}
static void *__snd_kmalloc(size_t size, gfp_t gfp_flags, void *caller)
{
unsigned long flags;
struct snd_alloc_track *t;
void *ptr;
ptr = snd_wrapper_kmalloc(size + sizeof(struct snd_alloc_track), gfp_flags);
if (ptr != NULL) {
t = (struct snd_alloc_track *)ptr;
t->magic = KMALLOC_MAGIC;
t->caller = caller;
spin_lock_irqsave(&snd_alloc_kmalloc_lock, flags);
list_add_tail(&t->list, &snd_alloc_kmalloc_list);
spin_unlock_irqrestore(&snd_alloc_kmalloc_lock, flags);
t->size = size;
snd_alloc_kmalloc += size;
ptr = t->data;
}
return ptr;
}
#define _snd_kmalloc(size, flags) __snd_kmalloc((size), (flags), __builtin_return_address(0));
void *snd_hidden_kmalloc(size_t size, gfp_t gfp_flags)
{
return _snd_kmalloc(size, gfp_flags);
}
void *snd_hidden_kzalloc(size_t size, gfp_t gfp_flags)
{
void *ret = _snd_kmalloc(size, gfp_flags);
if (ret)
memset(ret, 0, size);
return ret;
}
void *snd_hidden_kcalloc(size_t n, size_t size, gfp_t gfp_flags)
{
void *ret = NULL;
if (n != 0 && size > INT_MAX / n)
return ret;
return snd_hidden_kzalloc(n * size, gfp_flags);
}
void snd_hidden_kfree(const void *obj)
{
unsigned long flags;
struct snd_alloc_track *t;
if (obj == NULL)
return;
t = snd_alloc_track_entry(obj);
if (t->magic != KMALLOC_MAGIC) {
printk(KERN_WARNING "snd: bad kfree (called from %p)\n", __builtin_return_address(0));
return;
}
spin_lock_irqsave(&snd_alloc_kmalloc_lock, flags);
list_del(&t->list);
spin_unlock_irqrestore(&snd_alloc_kmalloc_lock, flags);
t->magic = 0;
snd_alloc_kmalloc -= t->size;
obj = t;
snd_wrapper_kfree(obj);
}
char *snd_hidden_kstrdup(const char *s, gfp_t gfp_flags)
{
int len;
char *buf;
if (!s) return NULL;
len = strlen(s) + 1;
buf = _snd_kmalloc(len, gfp_flags);
if (buf)
memcpy(buf, s, len);
return buf;
}
#ifdef CONFIG_PROC_FS
static struct snd_info_entry *snd_memory_info_entry;
static void snd_memory_info_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
{
snd_iprintf(buffer, "kmalloc: %li bytes\n", snd_alloc_kmalloc);
}
#define PROC_FILE_NAME "driver/snd-memory-debug"
int __init snd_memory_info_init(void)
{
struct snd_info_entry *entry;
entry = snd_info_create_module_entry(THIS_MODULE, "meminfo", NULL);
if (entry) {
entry->c.text.read = snd_memory_info_read;
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
entry = NULL;
}
}
snd_memory_info_entry = entry;
return 0;
}
void __exit snd_memory_info_done(void)
{
snd_info_free_entry(snd_memory_info_entry);
}
#endif
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