Extract synchronize tracer notifier functions

[lttng-tools.git] / src / common / trigger.c

diff --git a/src/common/trigger.c b/src/common/trigger.c
index 132fda138912ef8ac264f6452f274614c1b19eca..ad0d5df1ba9c26644f8ee08bb61245c0d244392b 100644 (file)
--- a/src/common/trigger.c
+++ b/src/common/trigger.c
@@ -7,9 +7,12 @@
 
 #include <lttng/trigger/trigger-internal.h>
 #include <lttng/condition/condition-internal.h>
-#include <lttng/condition/event-rule.h>
+#include <lttng/condition/on-event-internal.h>
+#include <lttng/condition/on-event.h>
+#include <lttng/condition/on-event-internal.h>
 #include <lttng/condition/buffer-usage.h>
 #include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-expr-internal.h>
 #include <lttng/action/action-internal.h>
 #include <common/credentials.h>
 #include <common/payload.h>
@@ -22,7 +25,7 @@
 #include <inttypes.h>
 
 LTTNG_HIDDEN
-bool lttng_trigger_validate(struct lttng_trigger *trigger)
+bool lttng_trigger_validate(const struct lttng_trigger *trigger)
 {
        bool valid;
 
@@ -83,14 +86,12 @@ struct lttng_condition *lttng_trigger_get_condition(
        return trigger ? trigger->condition : NULL;
 }
 
-LTTNG_HIDDEN
 const struct lttng_condition *lttng_trigger_get_const_condition(
                const struct lttng_trigger *trigger)
 {
-       return trigger->condition;
+       return trigger ? trigger->condition : NULL;
 }
 
-
 /*
  * Note: the lack of reference counting 'get' on the action object is normal.
  * This API was exposed as such in 2.11. The client is not expected to call
@@ -102,11 +103,10 @@ struct lttng_action *lttng_trigger_get_action(
        return trigger ? trigger->action : NULL;
 }
 
-LTTNG_HIDDEN
 const struct lttng_action *lttng_trigger_get_const_action(
                const struct lttng_trigger *trigger)
 {
-       return trigger->action;
+       return trigger ? trigger->action : NULL;
 }
 
 static void trigger_destroy_ref(struct urcu_ref *ref)
@@ -908,9 +908,9 @@ enum lttng_domain_type lttng_trigger_get_underlying_domain_type_restriction(
                /* Apply to any domain. */
                type = LTTNG_DOMAIN_NONE;
                break;
-       case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT:
+       case LTTNG_CONDITION_TYPE_ON_EVENT:
                /* Return the domain of the event rule. */
-               c_status = lttng_condition_event_rule_get_rule(
+               c_status = lttng_condition_on_event_get_rule(
                                trigger->condition, &event_rule);
                assert(c_status == LTTNG_CONDITION_STATUS_OK);
                type = lttng_event_rule_get_domain_type(event_rule);
@@ -928,3 +928,112 @@ enum lttng_domain_type lttng_trigger_get_underlying_domain_type_restriction(
 
        return type;
 }
+
+/*
+ * Generate bytecode related to the trigger.
+ * On success LTTNG_OK. On error, returns lttng_error code.
+ */
+LTTNG_HIDDEN
+enum lttng_error_code lttng_trigger_generate_bytecode(
+               struct lttng_trigger *trigger,
+               const struct lttng_credentials *creds)
+{
+       enum lttng_error_code ret;
+       struct lttng_condition *condition = NULL;
+
+       condition = lttng_trigger_get_condition(trigger);
+       if (!condition) {
+               ret = LTTNG_ERR_INVALID_TRIGGER;
+               goto end;
+       }
+
+       switch (lttng_condition_get_type(condition)) {
+       case LTTNG_CONDITION_TYPE_ON_EVENT:
+       {
+               struct lttng_event_rule *event_rule;
+               const enum lttng_condition_status condition_status =
+                               lttng_condition_on_event_borrow_rule_mutable(
+                                       condition, &event_rule);
+
+               assert(condition_status == LTTNG_CONDITION_STATUS_OK);
+
+               /* Generate the filter bytecode. */
+               ret = lttng_event_rule_generate_filter_bytecode(
+                               event_rule, creds);
+               if (ret != LTTNG_OK) {
+                       goto end;
+               }
+
+               /* Generate the capture bytecode. */
+               ret = lttng_condition_on_event_generate_capture_descriptor_bytecode(
+                               condition);
+               if (ret != LTTNG_OK) {
+                       goto end;
+               }
+
+               ret = LTTNG_OK;
+               break;
+       }
+       default:
+               ret = LTTNG_OK;
+               break;
+       }
+end:
+       return ret;
+}
+
+LTTNG_HIDDEN
+struct lttng_trigger *lttng_trigger_copy(const struct lttng_trigger *trigger)
+{
+       int ret;
+       struct lttng_payload copy_buffer;
+       struct lttng_trigger *copy = NULL;
+
+       lttng_payload_init(&copy_buffer);
+
+       ret = lttng_trigger_serialize(trigger, &copy_buffer);
+       if (ret < 0) {
+               goto end;
+       }
+
+       {
+               struct lttng_payload_view view =
+                               lttng_payload_view_from_payload(
+                                               &copy_buffer, 0, -1);
+               ret = lttng_trigger_create_from_payload(
+                               &view, &copy);
+               if (ret < 0) {
+                       copy = NULL;
+                       goto end;
+               }
+       }
+
+end:
+       lttng_payload_reset(&copy_buffer);
+       return copy;
+}
+
+LTTNG_HIDDEN
+bool lttng_trigger_needs_tracer_notifier(const struct lttng_trigger *trigger)
+{
+       bool needs_tracer_notifier = false;
+       const struct lttng_condition *condition =
+                       lttng_trigger_get_const_condition(trigger);
+
+       switch (lttng_condition_get_type(condition)) {
+       case LTTNG_CONDITION_TYPE_ON_EVENT:
+               needs_tracer_notifier = true;
+               goto end;
+       case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
+       case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
+       case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
+       case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
+       case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
+               goto end;
+       case LTTNG_CONDITION_TYPE_UNKNOWN:
+       default:
+               abort();
+       }
+end:
+       return needs_tracer_notifier;
+}