blob: aadb0c4cb1997d63af91582560fc006e6afeb06a (
plain)
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
|
/* Framework for putting a jprobe in a tasklet. */
/* Useful for testing probes in interrupt context. */
/* Doesn't do anything useful as is. Put test code in the inst func */
#define HASH_TABLE_BITS 8
#define HASH_TABLE_SIZE (1<<HASH_TABLE_BITS)
#define BUCKETS 16 /* largest histogram width */
#include "runtime.h"
#include "io.c"
#include "probes.c"
MODULE_DESCRIPTION("test jprobes of tasklets");
MODULE_AUTHOR("Martin Hunt <hunt@redhat.com>");
void inst__rcu_process_callbacks(struct rcu_ctrlblk *rcp,
struct rcu_state *rsp, struct rcu_data *rdp)
{
dlog ("interrupt=%d\n", in_interrupt());
jprobe_return();
}
static struct jprobe stp_probes[] = {
{
.kp.addr = (kprobe_opcode_t *)"__rcu_process_callbacks",
.entry = (kprobe_opcode_t *) inst__rcu_process_callbacks
},
};
#define MAX_STP_PROBES (sizeof(stp_probes)/sizeof(struct jprobe))
static int init_stp(void)
{
int ret = _stp_register_jprobes (stp_probes, MAX_STP_PROBES);
dlog("instrumentation is enabled...\n");
return ret;
}
static void cleanup_stp(void)
{
_stp_unregister_jprobes (stp_probes, MAX_STP_PROBES);
dlog ("EXIT\n");
}
module_init(init_stp);
module_exit(cleanup_stp);
MODULE_LICENSE("GPL");
|
