Add base support for event rule hit

[lttng-tools.git] / src / common / event-rule / syscall.c

diff --git a/src/common/event-rule/syscall.c b/src/common/event-rule/syscall.c
index b2feb2c6ecf4c772049d9c41d304544f185959d1..51f22fcc0ff85602d680f5216d790dc48f1c38a8 100644 (file)
--- a/src/common/event-rule/syscall.c
+++ b/src/common/event-rule/syscall.c
@@ -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 <lttng/event-rule/event-rule-internal.h>
 #include <lttng/event-rule/syscall-internal.h>
 
@@ -223,6 +225,25 @@ lttng_event_rule_syscall_generate_exclusions(
        return NULL;
 }
 
+static unsigned long
+lttng_event_rule_syscall_hash(
+               const struct lttng_event_rule *rule)
+{
+       unsigned long hash;
+       struct lttng_event_rule_syscall *syscall_rule =
+                       container_of(rule, typeof(*syscall_rule), parent);
+
+       hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_SYSCALL,
+                       lttng_ht_seed);
+       hash ^= hash_key_str(syscall_rule->pattern, lttng_ht_seed);
+       if (syscall_rule->filter_expression) {
+               hash ^= hash_key_str(syscall_rule->filter_expression,
+                               lttng_ht_seed);
+       }
+
+       return hash;
+}
+
 struct lttng_event_rule *lttng_event_rule_syscall_create()
 {
        struct lttng_event_rule *rule = NULL;
@@ -248,6 +269,7 @@ struct lttng_event_rule *lttng_event_rule_syscall_create()
                        lttng_event_rule_syscall_get_internal_filter_bytecode;
        syscall_rule->parent.generate_exclusions =
                        lttng_event_rule_syscall_generate_exclusions;
+       syscall_rule->parent.hash = lttng_event_rule_syscall_hash;
 end:
        return rule;
 }