X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Ftrigger.c;h=ec96fc80b7d804249c8c4f1f395d4a693080fd1e;hp=f47f76d5529a732a8f6e263d32a373d622ac1b92;hb=9c374932629a1c25927dad13fce02ba1c4892cf7;hpb=58daac01d91347336f24e1fc1cacd4e7a3101e93 diff --git a/src/common/trigger.c b/src/common/trigger.c index f47f76d55..ec96fc80b 100644 --- a/src/common/trigger.c +++ b/src/common/trigger.c @@ -5,25 +5,27 @@ * */ -#include -#include -#include -#include -#include -#include -#include +#include #include -#include -#include -#include -#include #include +#include #include -#include +#include +#include #include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include LTTNG_HIDDEN -bool lttng_trigger_validate(struct lttng_trigger *trigger) +bool lttng_trigger_validate(const struct lttng_trigger *trigger) { bool valid; @@ -60,15 +62,15 @@ struct lttng_trigger *lttng_trigger_create( urcu_ref_init(&trigger->ref); - trigger->firing_policy.type = LTTNG_TRIGGER_FIRING_POLICY_EVERY_N; - trigger->firing_policy.threshold = 1; - lttng_condition_get(condition); trigger->condition = condition; lttng_action_get(action); trigger->action = action; + pthread_mutex_init(&trigger->lock, NULL); + trigger->registered = false; + end: return trigger; } @@ -84,14 +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 @@ -103,11 +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) @@ -125,6 +124,8 @@ static void trigger_destroy_ref(struct urcu_ref *ref) lttng_action_put(action); lttng_condition_put(condition); + pthread_mutex_destroy(&trigger->lock); + free(trigger->name); free(trigger); } @@ -134,23 +135,6 @@ void lttng_trigger_destroy(struct lttng_trigger *trigger) lttng_trigger_put(trigger); } -static bool is_firing_policy_valid(enum lttng_trigger_firing_policy policy) -{ - bool valid = false; - - switch (policy) { - case LTTNG_TRIGGER_FIRING_POLICY_EVERY_N: - case LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N: - valid = true; - break; - default: - valid = false; - break; - } - - return valid; -} - LTTNG_HIDDEN ssize_t lttng_trigger_create_from_payload( struct lttng_payload_view *src_view, @@ -161,8 +145,6 @@ ssize_t lttng_trigger_create_from_payload( struct lttng_action *action = NULL; const struct lttng_trigger_comm *trigger_comm; const char *name = NULL; - uint64_t firing_policy_threshold; - enum lttng_trigger_firing_policy firing_policy; struct lttng_credentials creds = { .uid = LTTNG_OPTIONAL_INIT_UNSET, .gid = LTTNG_OPTIONAL_INIT_UNSET, @@ -197,13 +179,6 @@ ssize_t lttng_trigger_create_from_payload( offset += sizeof(*trigger_comm); - firing_policy = trigger_comm->firing_policy_type; - if (!is_firing_policy_valid(firing_policy)) { - ret =-1; - goto end; - } - - firing_policy_threshold = trigger_comm->firing_policy_threshold; if (trigger_comm->name_length != 0) { /* Name. */ const struct lttng_payload_view name_view = @@ -292,19 +267,6 @@ ssize_t lttng_trigger_create_from_payload( } } - /* Set the policy. */ - { - const enum lttng_trigger_status status = - lttng_trigger_set_firing_policy(trigger, - firing_policy, - firing_policy_threshold); - - if (status != LTTNG_TRIGGER_STATUS_OK) { - ret = -1; - goto end; - } - } - ret = offset; error: @@ -346,8 +308,6 @@ int lttng_trigger_serialize(const struct lttng_trigger *trigger, } trigger_comm.name_length = size_name; - trigger_comm.firing_policy_type = (uint8_t) trigger->firing_policy.type; - trigger_comm.firing_policy_threshold = (uint64_t) trigger->firing_policy.threshold; header_offset = payload->buffer.size; ret = lttng_dynamic_buffer_append(&payload->buffer, &trigger_comm, @@ -386,17 +346,10 @@ LTTNG_HIDDEN bool lttng_trigger_is_equal( const struct lttng_trigger *a, const struct lttng_trigger *b) { - if (a->firing_policy.type != b->firing_policy.type) { + if (strcmp(a->name, b->name) != 0) { return false; } - if (a->firing_policy.threshold != b->firing_policy.threshold) { - return false; - } - - /* - * Name is not taken into account since it is cosmetic only. - */ if (!lttng_condition_is_equal(a->condition, b->condition)) { return false; } @@ -796,97 +749,6 @@ end: return ret; } -enum lttng_trigger_status lttng_trigger_set_firing_policy( - struct lttng_trigger *trigger, - enum lttng_trigger_firing_policy policy_type, - uint64_t threshold) -{ - enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK; - assert(trigger); - - if (threshold < 1) { - ret = LTTNG_TRIGGER_STATUS_INVALID; - goto end; - } - - trigger->firing_policy.type = policy_type; - trigger->firing_policy.threshold = threshold; - -end: - return ret; -} - -enum lttng_trigger_status lttng_trigger_get_firing_policy( - const struct lttng_trigger *trigger, - enum lttng_trigger_firing_policy *policy_type, - uint64_t *threshold) -{ - enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK; - - if (!trigger || !policy_type || !threshold) { - status = LTTNG_TRIGGER_STATUS_INVALID; - goto end; - } - - *policy_type = trigger->firing_policy.type; - *threshold = trigger->firing_policy.threshold; - -end: - return status; -} - -LTTNG_HIDDEN -bool lttng_trigger_should_fire(const struct lttng_trigger *trigger) -{ - bool ready_to_fire = false; - - assert(trigger); - - switch (trigger->firing_policy.type) { - case LTTNG_TRIGGER_FIRING_POLICY_EVERY_N: - if (trigger->firing_policy.current_count < trigger->firing_policy.threshold) { - ready_to_fire = true; - } - break; - case LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N: - if (trigger->firing_policy.current_count < trigger->firing_policy.threshold) { - ready_to_fire = true; - } - break; - default: - abort(); - }; - - return ready_to_fire; -} - -LTTNG_HIDDEN -void lttng_trigger_fire(struct lttng_trigger *trigger) -{ - assert(trigger); - - trigger->firing_policy.current_count++; - - switch (trigger->firing_policy.type) { - case LTTNG_TRIGGER_FIRING_POLICY_EVERY_N: - if (trigger->firing_policy.current_count == trigger->firing_policy.threshold) { - trigger->firing_policy.current_count = 0; - } - - break; - case LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N: - /* - * TODO: - * As an optimisation, deactivate the trigger condition and - * remove any checks in the traced application or kernel since - * the trigger will never fire again. - */ - break; - default: - abort(); - }; -} - LTTNG_HIDDEN enum lttng_domain_type lttng_trigger_get_underlying_domain_type_restriction( const struct lttng_trigger *trigger) @@ -909,9 +771,9 @@ 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); @@ -949,20 +811,29 @@ enum lttng_error_code lttng_trigger_generate_bytecode( } switch (lttng_condition_get_type(condition)) { - case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT: + case LTTNG_CONDITION_TYPE_ON_EVENT: { struct lttng_event_rule *event_rule; const enum lttng_condition_status condition_status = - lttng_condition_event_rule_borrow_rule_mutable( + 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; } @@ -973,3 +844,101 @@ enum lttng_error_code lttng_trigger_generate_bytecode( 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; +} + +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; +} + +LTTNG_HIDDEN +void lttng_trigger_set_as_registered(struct lttng_trigger *trigger) +{ + pthread_mutex_lock(&trigger->lock); + trigger->registered = true; + pthread_mutex_unlock(&trigger->lock); +} + +LTTNG_HIDDEN +void lttng_trigger_set_as_unregistered(struct lttng_trigger *trigger) +{ + pthread_mutex_lock(&trigger->lock); + trigger->registered = false; + pthread_mutex_unlock(&trigger->lock); +} + +/* + * The trigger must be locked before calling lttng_trigger_registered. + * The lock is necessary since a trigger can be unregistered at anytime. + * Manipulations requiring that the trigger be registered must always acquire + * the trigger lock for the duration of the manipulation using + * `lttng_trigger_lock` and `lttng_trigger_unlock`. + */ +LTTNG_HIDDEN +bool lttng_trigger_is_registered(struct lttng_trigger *trigger) +{ + ASSERT_LOCKED(trigger->lock); + return trigger->registered; +} + +LTTNG_HIDDEN +void lttng_trigger_lock(struct lttng_trigger *trigger) +{ + pthread_mutex_lock(&trigger->lock); +} + +LTTNG_HIDDEN +void lttng_trigger_unlock(struct lttng_trigger *trigger) +{ + pthread_mutex_unlock(&trigger->lock); +}