X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;ds=sidebyside;f=liblttng-ust%2Fust-events-internal.h;h=24b56d3b33f3b7c82d21ea43971b00abb32b8267;hb=5a664ef1b6f7398f493addc2745df37c61abb655;hp=fc55cb03b64e3fb275bf7fe6e27a01c2020298f5;hpb=49cde654915a90aab1c1fb1cd02c829b4a3e4473;p=lttng-ust.git diff --git a/liblttng-ust/ust-events-internal.h b/liblttng-ust/ust-events-internal.h index fc55cb03..24b56d3b 100644 --- a/liblttng-ust/ust-events-internal.h +++ b/liblttng-ust/ust-events-internal.h @@ -1,38 +1,41 @@ -#ifndef _LTTNG_UST_EVENTS_INTERNAL_H -#define _LTTNG_UST_EVENTS_INTERNAL_H - /* - * ust-events-internal.h - * - * Copyright 2019 (c) - Francis Deslauriers - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. + * SPDX-License-Identifier: MIT * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. + * Copyright 2019 (c) Francis Deslauriers */ +#ifndef _LTTNG_UST_EVENTS_INTERNAL_H +#define _LTTNG_UST_EVENTS_INTERNAL_H + #include #include #include -#include +#include #include +enum lttng_enabler_format_type { + LTTNG_ENABLER_FORMAT_STAR_GLOB, + LTTNG_ENABLER_FORMAT_EVENT, +}; + +/* + * Enabler field, within whatever object is enabling an event. Target of + * backward reference. + */ +struct lttng_enabler { + enum lttng_enabler_format_type format_type; + + /* head list of struct lttng_ust_filter_bytecode_node */ + struct cds_list_head filter_bytecode_head; + /* head list of struct lttng_ust_excluder_node */ + struct cds_list_head excluder_head; + + struct lttng_ust_event event_param; + unsigned int enabled:1; +}; + struct lttng_event_enabler { struct lttng_enabler base; struct cds_list_head node; /* per-session list of enablers */ @@ -81,6 +84,87 @@ struct lttng_ust_excluder_node { struct lttng_ust_event_exclusion excluder; }; +/* Data structures used by the tracer. */ + +struct tp_list_entry { + struct lttng_ust_tracepoint_iter tp; + struct cds_list_head head; +}; + +struct lttng_ust_tracepoint_list { + struct tp_list_entry *iter; + struct cds_list_head head; +}; + +struct tp_field_list_entry { + struct lttng_ust_field_iter field; + struct cds_list_head head; +}; + +struct lttng_ust_field_list { + struct tp_field_list_entry *iter; + struct cds_list_head head; +}; + +/* + * Objects in a linked-list of enablers, owned by an event or event_notifier. + * This is used because an event (or a event_notifier) can be enabled by more + * than one enabler and we want a quick way to iterate over all enablers of an + * object. + * + * For example, event rules "my_app:a*" and "my_app:ab*" will both match the + * event with the name "my_app:abc". + */ +struct lttng_enabler_ref { + struct cds_list_head node; /* enabler ref list */ + struct lttng_enabler *ref; /* backward ref */ +}; + +#define LTTNG_COUNTER_DIMENSION_MAX 8 +struct lttng_counter_dimension { + uint64_t size; + uint64_t underflow_index; + uint64_t overflow_index; + uint8_t has_underflow; + uint8_t has_overflow; +}; + +struct lttng_counter { + int objd; + struct lttng_event_notifier_group *event_notifier_group; /* owner */ + struct lttng_counter_transport *transport; + struct lib_counter *counter; + struct lttng_counter_ops *ops; +}; + +struct lttng_event_notifier_group { + int objd; + void *owner; + int notification_fd; + struct cds_list_head node; /* Event notifier group handle list */ + struct cds_list_head enablers_head; + struct cds_list_head event_notifiers_head; /* list of event_notifiers */ + struct lttng_ust_event_notifier_ht event_notifiers_ht; /* hashtable of event_notifiers */ + struct lttng_ctx *ctx; /* contexts for filters. */ + + struct lttng_counter *error_counter; + size_t error_counter_len; +}; + +struct lttng_transport { + char *name; + struct cds_list_head node; + struct lttng_channel_ops ops; + const struct lttng_ust_lib_ring_buffer_config *client_config; +}; + +struct lttng_counter_transport { + char *name; + struct cds_list_head node; + struct lttng_counter_ops ops; + const struct lib_counter_config *client_config; +}; + static inline struct lttng_enabler *lttng_event_enabler_as_enabler( struct lttng_event_enabler *event_enabler) @@ -244,6 +328,9 @@ int lttng_event_notifier_enabler_attach_exclusion( struct lttng_event_notifier_enabler *event_notifier_enabler, struct lttng_ust_excluder_node **excluder); +LTTNG_HIDDEN +void lttng_free_event_filter_runtime(struct lttng_event *event); + LTTNG_HIDDEN void lttng_free_event_notifier_filter_runtime( struct lttng_event_notifier *event_notifier); @@ -260,4 +347,105 @@ struct lttng_counter *lttng_ust_counter_create( const char *counter_transport_name, size_t number_dimensions, const struct lttng_counter_dimension *dimensions); +#ifdef HAVE_PERF_EVENT + +LTTNG_HIDDEN +int lttng_add_perf_counter_to_ctx(uint32_t type, + uint64_t config, + const char *name, + struct lttng_ctx **ctx); +LTTNG_HIDDEN +int lttng_perf_counter_init(void); +LTTNG_HIDDEN +void lttng_perf_counter_exit(void); + +#else /* #ifdef HAVE_PERF_EVENT */ + +static inline +int lttng_add_perf_counter_to_ctx(uint32_t type, + uint64_t config, + const char *name, + struct lttng_ctx **ctx) +{ + return -ENOSYS; +} +static inline +int lttng_perf_counter_init(void) +{ + return 0; +} +static inline +void lttng_perf_counter_exit(void) +{ +} +#endif /* #else #ifdef HAVE_PERF_EVENT */ + +LTTNG_HIDDEN +int lttng_probes_get_event_list(struct lttng_ust_tracepoint_list *list); +LTTNG_HIDDEN +void lttng_probes_prune_event_list(struct lttng_ust_tracepoint_list *list); + +LTTNG_HIDDEN +int lttng_probes_get_field_list(struct lttng_ust_field_list *list); +LTTNG_HIDDEN +void lttng_probes_prune_field_list(struct lttng_ust_field_list *list); + +LTTNG_HIDDEN +struct lttng_ust_tracepoint_iter * + lttng_ust_tracepoint_list_get_iter_next(struct lttng_ust_tracepoint_list *list); +LTTNG_HIDDEN +struct lttng_ust_field_iter * + lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list *list); + +LTTNG_HIDDEN +struct lttng_session *lttng_session_create(void); +LTTNG_HIDDEN +int lttng_session_enable(struct lttng_session *session); +LTTNG_HIDDEN +int lttng_session_disable(struct lttng_session *session); +LTTNG_HIDDEN +int lttng_session_statedump(struct lttng_session *session); +LTTNG_HIDDEN +void lttng_session_destroy(struct lttng_session *session); + +LTTNG_HIDDEN +struct cds_list_head *lttng_get_sessions(void); + +LTTNG_HIDDEN +void lttng_handle_pending_statedump(void *owner); + +LTTNG_HIDDEN +struct lttng_channel *lttng_channel_create(struct lttng_session *session, + const char *transport_name, + void *buf_addr, + size_t subbuf_size, size_t num_subbuf, + unsigned int switch_timer_interval, + unsigned int read_timer_interval, + int **shm_fd, int **wait_fd, + uint64_t **memory_map_size, + struct lttng_channel *chan_priv_init); + +LTTNG_HIDDEN +int lttng_channel_enable(struct lttng_channel *channel); +LTTNG_HIDDEN +int lttng_channel_disable(struct lttng_channel *channel); + +LTTNG_HIDDEN +void lttng_transport_register(struct lttng_transport *transport); +LTTNG_HIDDEN +void lttng_transport_unregister(struct lttng_transport *transport); + +LTTNG_HIDDEN +void lttng_probe_provider_unregister_events(struct lttng_probe_desc *desc); + +LTTNG_HIDDEN +int lttng_fix_pending_events(void); + +LTTNG_HIDDEN +struct cds_list_head *lttng_get_probe_list_head(void); + +LTTNG_HIDDEN +struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_session *session, + const struct lttng_enum_desc *enum_desc); + #endif /* _LTTNG_UST_EVENTS_INTERNAL_H */