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#define HASH_TABLE_BITS 8
#define HASH_TABLE_SIZE (1<<HASH_TABLE_BITS)
#define BUCKETS 16 /* largest histogram width */
#define STP_NETLINK_ONLY
#define STP_NUM_STRINGS 1
#include <linux/module.h>
#include <linux/interrupt.h>
#include <net/sock.h>
#include <linux/netlink.h>
#include "runtime.h"
#include "map.c"
#include "probes.c"
#include "stack.c"
MODULE_DESCRIPTION("SystemTap probe: test4");
MODULE_AUTHOR("Martin Hunt <hunt@redhat.com>");
MAP opens, reads, writes, traces;
asmlinkage long inst_sys_open (const char __user * filename, int flags, int mode)
{
_stp_map_key_str (opens, current->comm);
_stp_map_add_int64 (opens, 1);
jprobe_return();
return 0;
}
asmlinkage ssize_t inst_sys_read (unsigned int fd, char __user * buf, size_t count)
{
_stp_map_key_str (reads, current->comm);
_stp_map_stat_add (reads, count);
jprobe_return();
return 0;
}
asmlinkage ssize_t inst_sys_write (unsigned int fd, const char __user * buf, size_t count)
{
_stp_map_key_str (writes, current->comm);
_stp_map_stat_add (writes, count);
jprobe_return();
return 0;
}
int inst_show_cpuinfo(struct seq_file *m, void *v)
{
String str = _stp_string_init (0);
_stp_stack_print (0,0);
_stp_stack_print (1,0);
_stp_list_add (traces, _stp_stack_sprint(str, 0, 0));
jprobe_return();
return 0;
}
static struct jprobe dtr_probes[] = {
{
.kp.addr = (kprobe_opcode_t *)"sys_open",
.entry = (kprobe_opcode_t *) inst_sys_open
},
{
.kp.addr = (kprobe_opcode_t *)"sys_read",
.entry = (kprobe_opcode_t *) inst_sys_read
},
{
.kp.addr = (kprobe_opcode_t *)"sys_write",
.entry = (kprobe_opcode_t *) inst_sys_write
},
{
.kp.addr = (kprobe_opcode_t *)"show_cpuinfo",
.entry = (kprobe_opcode_t *) inst_show_cpuinfo,
},
};
#define MAX_DTR_ROUTINE (sizeof(dtr_probes)/sizeof(struct jprobe))
static unsigned n_subbufs = 4;
module_param(n_subbufs, uint, 0);
MODULE_PARM_DESC(n_subbufs, "number of sub-buffers per per-cpu buffer");
static unsigned subbuf_size = 65536;
module_param(subbuf_size, uint, 0);
MODULE_PARM_DESC(subbuf_size, "size of each per-cpu sub-buffers");
static int pid;
module_param(pid, int, 0);
MODULE_PARM_DESC(pid, "daemon pid");
static int init_dtr(void)
{
int ret;
if (!pid) {
printk("init_dtr: Can't start without daemon pid\n");
return -1;
}
if (_stp_transport_open(n_subbufs, subbuf_size, pid) < 0) {
printk("init_dtr: Couldn't open transport\n");
return -1;
}
opens = _stp_map_new (1000, INT64);
reads = _stp_map_new (1000, STAT);
writes = _stp_map_new (1000, STAT);
traces = _stp_list_new (1000, STRING);
ret = _stp_register_jprobes (dtr_probes, MAX_DTR_ROUTINE);
_stp_log("instrumentation is enabled...\n");
return ret;
}
static int exited; /* FIXME: this is a stopgap - if we don't do this
* and are manually removed, bad things happen */
static void probe_exit (void)
{
struct map_node_stat *st;
struct map_node_int64 *ptr;
struct map_node_str *sptr;
exited = 1;
_stp_unregister_jprobes (dtr_probes, MAX_DTR_ROUTINE);
foreach (traces, sptr) {
_stp_printf ("trace: %s\n", sptr->str);
_stp_print_flush ();
}
foreach (opens, ptr) {
_stp_printf ("opens[%s] = %lld\n", key1str(ptr), ptr->val);
_stp_print_flush ();
}
foreach (reads, st) {
_stp_printf ("reads[%s] = [count=%lld sum=%lld min=%lld max=%lld]\n", key1str(st),
st->stats.count, st->stats.sum, st->stats.min, st->stats.max);
_stp_print_flush ();
}
foreach (writes, st) {
_stp_printf ("writes[%s] = [count=%lld sum=%lld min=%lld max=%lld]\n", key1str(st),
st->stats.count, st->stats.sum, st->stats.min, st->stats.max);
_stp_print_flush();
}
_stp_map_del (opens);
_stp_map_del (reads);
_stp_map_del (writes);
}
static void cleanup_dtr(void)
{
if (!exited)
probe_exit();
_stp_transport_close();
}
module_init(init_dtr);
module_exit(cleanup_dtr);
MODULE_LICENSE("GPL");
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