Add base support for event rule hit
[lttng-tools.git] / src / common / event-rule / kprobe.c
index 6846f0cb16a2b664c4635227b09d4b2ee58535b9..15dabdde3d0ceca5e8f334c20255ba1132999d83 100644 (file)
@@ -12,6 +12,8 @@
 #include <common/payload.h>
 #include <common/payload-view.h>
 #include <common/runas.h>
+#include <common/hashtable/hashtable.h>
+#include <common/hashtable/utils.h>
 #include <ctype.h>
 #include <lttng/constant.h>
 #include <lttng/event-rule/event-rule-internal.h>
@@ -175,6 +177,22 @@ lttng_event_rule_kprobe_generate_exclusions(const struct lttng_event_rule *rule)
        return NULL;
 }
 
+static unsigned long
+lttng_event_rule_kprobe_hash(
+               const struct lttng_event_rule *rule)
+{
+       unsigned long hash;
+       struct lttng_event_rule_kprobe *krule =
+                       container_of(rule, typeof(*krule), parent);
+
+       hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_KPROBE,
+                       lttng_ht_seed);
+       hash ^= hash_key_str(krule->name, lttng_ht_seed);
+       hash ^= lttng_kernel_probe_location_hash(krule->location);
+
+       return hash;
+}
+
 struct lttng_event_rule *lttng_event_rule_kprobe_create()
 {
        struct lttng_event_rule *rule = NULL;
@@ -198,6 +216,7 @@ struct lttng_event_rule *lttng_event_rule_kprobe_create()
                        lttng_event_rule_kprobe_get_filter_bytecode;
        krule->parent.generate_exclusions =
                        lttng_event_rule_kprobe_generate_exclusions;
+       krule->parent.hash = lttng_event_rule_kprobe_hash;
 end:
        return rule;
 }
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