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
|
/* 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 STP_NETLINK_ONLY
#define STP_NUM_STRINGS 1
static unsigned n_subbufs = 4;
static unsigned subbuf_size = 65536;
#include "runtime.h"
#ifdef STP_NETLINK_ONLY
static int transport_mode = STP_TRANSPORT_NETLINK;
#else
static int transport_mode = STP_TRANSPORT_RELAYFS;
#endif
#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)
{
_stp_printf ("count=%d irqs_disabled=%d in_interrupt=%d in_irq=%d",
preempt_count(), irqs_disabled(), in_interrupt(), in_irq());
_stp_print_flush();
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 pid;
module_param(pid, int, 0);
MODULE_PARM_DESC(pid, "daemon pid");
int init_module(void)
{
int ret;
if (!pid)
{
printk("init_dtr: Can't start without daemon pid\n");
return -1;
}
if (_stp_transport_open(transport_mode, n_subbufs, subbuf_size, pid) < 0) {
printk("init_dtr: Couldn't open transport\n");
return -1;
}
ret = _stp_register_jprobes (stp_probes, MAX_STP_PROBES);
return ret;
}
static void probe_exit (void)
{
_stp_unregister_jprobes (stp_probes, MAX_STP_PROBES);
}
void cleanup_module(void)
{
_stp_transport_close();
}
MODULE_LICENSE("GPL");
|
