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
|
// SPDX-License-Identifier: GPL-2.0
/*
* mm/memtrace_ashmem.c
*
* Copyright (c) 2022 Huawei Technologies Co., Ltd.
*/
#include <linux/fs.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/fdtable.h>
#include <linux/sched/task.h>
#include <linux/sched/signal.h>
#include <linux/memcheck.h>
#include "../drivers/staging/android/ashmem.h"
static int ashmem_debug_process_info_open(struct inode *inode,
struct file *file);
struct ashmem_debug_process_info_args {
struct seq_file *seq;
struct task_struct *tsk;
};
static const struct proc_ops debug_process_ashmem_info_fops = {
.proc_open = ashmem_debug_process_info_open,
.proc_read = seq_read,
.proc_lseek = seq_lseek,
.proc_release = single_release,
};
static int ashmem_debug_process_info_cb(const void *data,
struct file *f, unsigned int fd)
{
const struct ashmem_debug_process_info_args *args = data;
struct task_struct *tsk = args->tsk;
if (!is_ashmem_file(f))
return 0;
seq_printf(args->seq,
"%s %u %u %s %zu\n",
tsk->comm, tsk->pid, fd,
get_ashmem_name_by_file(f),
get_ashmem_size_by_file(f));
return 0;
}
static int ashmem_debug_process_info_show(struct seq_file *s, void *d)
{
struct task_struct *tsk = NULL;
struct ashmem_debug_process_info_args cb_args;
seq_puts(s, "Process ashmem detail info:\n");
seq_puts(s, "----------------------------------------------------\n");
seq_printf(s, "%s %s %s %s %s\n",
"Process name", "Process ID",
"fd", "ashmem_name", "size");
ashmem_mutex_lock();
rcu_read_lock();
for_each_process(tsk) {
if (tsk->flags & PF_KTHREAD)
continue;
cb_args.seq = s;
cb_args.tsk = tsk;
task_lock(tsk);
iterate_fd(tsk->files, 0,
ashmem_debug_process_info_cb, (void *)&cb_args);
task_unlock(tsk);
}
rcu_read_unlock();
ashmem_mutex_unlock();
seq_puts(s, "----------------------------------------------------\n");
return 0;
}
static int ashmem_debug_process_info_open(struct inode *inode,
struct file *file)
{
return single_open(file, ashmem_debug_process_info_show,
inode->i_private);
}
void init_ashmem_process_info(void)
{
struct proc_dir_entry *entry = NULL;
entry = proc_create_data("ashmem_process_info", 0444,
NULL, &debug_process_ashmem_info_fops, NULL);
if (!entry)
pr_err("Failed to create ashmem debug info\n");
}
|
