X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=src%2Fcommon%2Ftrigger.c;h=9e0333be9e44e517f335fedb389e7fdea04958ee;hb=refs%2Fheads%2Fsow-2020-0002-rev2;hp=8c43fdbd8aaa8aa7f7ad1fda253ea8701c7f751c;hpb=5c504c41e4d470012cb98c849aa82086d1ba1bde;p=lttng-tools.git diff --git a/src/common/trigger.c b/src/common/trigger.c index 8c43fdbd8..9e0333be9 100644 --- a/src/common/trigger.c +++ b/src/common/trigger.c @@ -7,10 +7,18 @@ #include #include +#include +#include +#include +#include +#include +#include #include +#include #include #include #include +#include #include #include #include @@ -18,7 +26,7 @@ #include LTTNG_HIDDEN -bool lttng_trigger_validate(struct lttng_trigger *trigger) +bool lttng_trigger_validate(const struct lttng_trigger *trigger) { bool valid; @@ -79,14 +87,12 @@ 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 @@ -98,11 +104,10 @@ 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) @@ -390,8 +395,13 @@ bool lttng_trigger_is_equal( } /* - * Name is not taken into account since it is cosmetic only. + * FIXME: frdeso: this is a change of behavior. + * See internal tracker issue 1028. */ + if (strcmp(a->name, b->name) != 0) { + return false; + } + if (!lttng_condition_is_equal(a->condition, b->condition)) { return false; } @@ -881,3 +891,215 @@ void lttng_trigger_fire(struct lttng_trigger *trigger) abort(); }; } + +LTTNG_HIDDEN +enum lttng_domain_type lttng_trigger_get_underlying_domain_type_restriction( + const struct lttng_trigger *trigger) +{ + enum lttng_domain_type type = LTTNG_DOMAIN_NONE; + const struct lttng_event_rule *event_rule; + enum lttng_condition_status c_status; + enum lttng_condition_type c_type; + + assert(trigger); + assert(trigger->condition); + + c_type = lttng_condition_get_type(trigger->condition); + assert (c_type != LTTNG_CONDITION_TYPE_UNKNOWN); + + switch (c_type) { + case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: + case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: + case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: + /* Apply to any domain. */ + type = LTTNG_DOMAIN_NONE; + break; + case LTTNG_CONDITION_TYPE_ON_EVENT: + /* Return the domain of the event 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); + break; + case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: + case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: + /* Return the domain of the channel being monitored. */ + c_status = lttng_condition_buffer_usage_get_domain_type( + trigger->condition, &type); + assert(c_status == LTTNG_CONDITION_STATUS_OK); + break; + default: + abort(); + } + + 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(©_buffer); + + ret = lttng_trigger_serialize(trigger, ©_buffer); + if (ret < 0) { + goto end; + } + + { + struct lttng_payload_view view = + lttng_payload_view_from_payload( + ©_buffer, 0, -1); + ret = lttng_trigger_create_from_payload( + &view, ©); + if (ret < 0) { + copy = NULL; + goto end; + } + } + +end: + lttng_payload_reset(©_buffer); + return copy; +} + + +static +bool action_type_needs_tracer_notifier(enum lttng_action_type action_type) +{ + switch (action_type) { + case LTTNG_ACTION_TYPE_NOTIFY: + case LTTNG_ACTION_TYPE_START_SESSION: + case LTTNG_ACTION_TYPE_STOP_SESSION: + case LTTNG_ACTION_TYPE_SNAPSHOT_SESSION: + case LTTNG_ACTION_TYPE_ROTATE_SESSION: + return true; + case LTTNG_ACTION_TYPE_INCREMENT_VALUE: + return false; + case LTTNG_ACTION_TYPE_GROUP: + case LTTNG_ACTION_TYPE_UNKNOWN: + default: + abort(); + } +} + +static +bool action_needs_tracer_notifier(const struct lttng_action *action) +{ + bool needs_tracer_notifier = false; + unsigned int i, count; + enum lttng_action_status action_status; + enum lttng_action_type action_type; + + assert(action); + /* If there is only one action. Check if it needs a tracer notifier. */ + action_type = lttng_action_get_type(action); + if (action_type != LTTNG_ACTION_TYPE_GROUP) { + needs_tracer_notifier = action_type_needs_tracer_notifier( + action_type); + goto end; + } + + /* + * Iterate over all the actions of the action group and check if any of + * them needs a tracer notifier. + */ + action_status = lttng_action_group_get_count(action, &count); + assert(action_status == LTTNG_ACTION_STATUS_OK); + for (i = 0; i < count; i++) { + const struct lttng_action *inner_action = + lttng_action_group_get_at_index(action, i); + + action_type = lttng_action_get_type(inner_action); + if (action_type_needs_tracer_notifier(action_type)) { + needs_tracer_notifier = true; + goto end; + } + } + +end: + return needs_tracer_notifier; +} + +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); + const struct lttng_action *action = + lttng_trigger_get_const_action(trigger); + + switch (lttng_condition_get_type(condition)) { + case LTTNG_CONDITION_TYPE_ON_EVENT: + needs_tracer_notifier = action_needs_tracer_notifier(action); + 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; +}