SystemTap: probes/test4/dtr.c Source File

00001 #define HASH_TABLE_BITS 8
-00002 #define HASH_TABLE_SIZE (1<<HASH_TABLE_BITS)
-00003 #define BUCKETS 16 /* largest histogram width */
-00004 
-00005 #define STP_NETLINK_ONLY
-00006 #define STP_NUM_STRINGS 1
-00007 
-00008 #include <linux/module.h>
-00009 #include <linux/interrupt.h>
-00010 #include <net/sock.h>
-00011 #include <linux/netlink.h>
-00012 
-00013 #include "runtime.h"
-00014 #include "map.c"
-00015 #include "probes.c"
-00016 #include "stack.c"
-00017 
-00018 MODULE_DESCRIPTION("SystemTap probe: test4");
-00019 MODULE_AUTHOR("Martin Hunt <hunt@redhat.com>");
-00020 
-00021 
-00022 MAP opens, reads, writes, traces;
-00023 
-00024 asmlinkage long inst_sys_open (const char __user * filename, int flags, int mode)
-00025 {
-00026   _stp_map_key_str (opens, current->comm);
-00027   _stp_map_add_int64 (opens, 1);
-00028   jprobe_return();
-00029   return 0;
-00030 }
-00031 
-00032 asmlinkage ssize_t inst_sys_read (unsigned int fd, char __user * buf, size_t count)
-00033 {
-00034   _stp_map_key_str (reads, current->comm);
-00035   _stp_map_stat_add (reads, count);
-00036   jprobe_return();
-00037   return 0;
-00038 }
-00039 
-00040 asmlinkage ssize_t inst_sys_write (unsigned int fd, const char __user * buf, size_t count)
-00041 {
-00042   _stp_map_key_str (writes, current->comm);
-00043   _stp_map_stat_add (writes, count);
-00044   jprobe_return();
-00045   return 0;
-00046 }
-00047 
-00048 int inst_show_cpuinfo(struct seq_file *m, void *v)
-00049 {
-00050   String str = _stp_string_init (0);
-00051   _stp_stack_print (0,0);
-00052   _stp_stack_print (1,0);
-00053   _stp_list_add (traces, _stp_stack_sprint(str, 0, 0));
-00054 
-00055   jprobe_return();
-00056   return 0;
-00057 }
-00058 
-00059 
-00060 static struct jprobe dtr_probes[] = {
-00061   {
-00062     .kp.addr = (kprobe_opcode_t *)"sys_open",
-00063     .entry = (kprobe_opcode_t *) inst_sys_open
-00064   },
-00065   {
-00066     .kp.addr = (kprobe_opcode_t *)"sys_read",
-00067     .entry = (kprobe_opcode_t *) inst_sys_read
-00068   },
-00069   {
-00070     .kp.addr = (kprobe_opcode_t *)"sys_write",
-00071     .entry = (kprobe_opcode_t *) inst_sys_write
-00072   },
-00073   {
-00074     .kp.addr = (kprobe_opcode_t *)"show_cpuinfo",
-00075     .entry = (kprobe_opcode_t *) inst_show_cpuinfo,
-00076   },
-00077 };
-00078 
-00079 #define MAX_DTR_ROUTINE (sizeof(dtr_probes)/sizeof(struct jprobe))
-00080 
-00081 static int init_dtr(void)
-00082 {
-00083   int ret;
-00084   
-00085   if (_stp_netlink_open() < 0)
-00086     return -1;
-00087   
-00088   opens = _stp_map_new (1000, INT64);
-00089   reads = _stp_map_new (1000, STAT);
-00090   writes = _stp_map_new (1000, STAT);
-00091   traces = _stp_list_new (1000, STRING);
-00092 
-00093   ret = _stp_register_jprobes (dtr_probes, MAX_DTR_ROUTINE);
-00094 
-00095   _stp_log("instrumentation is enabled...\n");
-00096   return ret;
-00097 }
-00098 
-00099 static void probe_exit (void)
-00100 {
-00101   struct map_node_stat *st;
-00102   struct map_node_int64 *ptr;
-00103   struct map_node_str *sptr;
-00104 
-00105   _stp_unregister_jprobes (dtr_probes, MAX_DTR_ROUTINE);
-00106 
-00107   foreach (traces, sptr) {
-00108     _stp_printf ("trace: %s\n", sptr->str);
-00109     _stp_print_flush ();
-00110   }
-00111 
-00112   foreach (opens, ptr) {
-00113     _stp_printf ("opens[%s] = %lld\n", key1str(ptr), ptr->val); 
-00114     _stp_print_flush ();
-00115   }
-00116 
-00117   foreach (reads, st) {
-00118     _stp_printf ("reads[%s] = [count=%lld  sum=%lld   min=%lld   max=%lld]\n", key1str(st), 
-00119                 st->stats.count, st->stats.sum, st->stats.min, st->stats.max);
-00120     _stp_print_flush ();
-00121   }
-00122   
-00123   foreach (writes, st) {
-00124     _stp_printf ("writes[%s] = [count=%lld  sum=%lld   min=%lld   max=%lld]\n", key1str(st), 
-00125                 st->stats.count, st->stats.sum, st->stats.min, st->stats.max);
-00126     _stp_print_flush();
-00127   }
-00128 
-00129   _stp_map_del (opens);
-00130   _stp_map_del (reads);
-00131   _stp_map_del (writes);
-00132 }
-00133 
-00134 static void cleanup_dtr(void)
-00135 {
-00136   _stp_netlink_close();
-00137 }
-00138 
-00139 module_init(init_dtr);
-00140 module_exit(cleanup_dtr);
-00141 MODULE_LICENSE("GPL");
-00142 
-