1 files changed, 105 insertions, 0 deletions
diff --git a/runtime/probes/test4/dtr.c b/runtime/probes/test4/dtr.c
new file mode 100644
index 00000000..1c8d8f05
--- /dev/null
+++ b/runtime/probes/test4/dtr.c
@@ -0,0 +1,105 @@
+#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 "map.c"
+#include "probes.c"
+
+MODULE_DESCRIPTION("SystemTap probe: test4");
+MODULE_AUTHOR("Martin Hunt <hunt@redhat.com>");
+
+MAP opens, reads, writes;
+
+asmlinkage long inst_sys_open (const char __user * filename, int flags, int mode)
+{
+  _stp_map_key_str (opens, current->comm);
+  _stp_map_set_int64 (opens, _stp_map_get_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;
+}
+
+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
+  },
+};
+
+#define MAX_DTR_ROUTINE (sizeof(dtr_probes)/sizeof(struct jprobe))
+
+static int init_dtr(void)
+{
+  int ret;
+  
+  opens = _stp_map_new (1000, INT64);
+  reads = _stp_map_new (1000, STAT);
+  writes = _stp_map_new (1000, STAT);
+
+  ret = _stp_register_jprobes (dtr_probes, MAX_DTR_ROUTINE);
+
+  dlog("instrumentation is enabled...\n");
+  return ret;
+
+}
+
+static void cleanup_dtr(void)
+{
+  struct map_node_stat *st;
+  struct map_node_int64 *ptr;
+
+  _stp_unregister_jprobes (dtr_probes, MAX_DTR_ROUTINE);
+
+  for (ptr = (struct map_node_int64 *)_stp_map_start(opens); ptr; 
+       ptr = (struct map_node_int64 *)_stp_map_iter (opens,(struct map_node *)ptr))
+    dlog ("opens[%s] = %lld\n", key1str(ptr), ptr->val); 
+  dlog ("\n");
+
+  for (st = (struct map_node_stat *)_stp_map_start(reads); st; 
+       st = (struct map_node_stat *)_stp_map_iter (reads,(struct map_node *)st))
+    dlog ("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);
+  dlog ("\n");
+
+  for (st = (struct map_node_stat *)_stp_map_start(writes); st; 
+       st = (struct map_node_stat *)_stp_map_iter (writes,(struct map_node *)st))
+    dlog ("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);
+  dlog ("\n");
+
+  _stp_map_del (opens);
+  _stp_map_del (reads);
+  _stp_map_del (writes);
+
+  dlog("EXIT\n");
+}
+
+module_init(init_dtr);
+module_exit(cleanup_dtr);
+MODULE_LICENSE("GPL");
+