+++ /dev/null
-/*
- * SPDX-License-Identifier: MIT
- *
- * Copyright 2019 (c) Francis Deslauriers <francis.deslauriers@efficios.com>
- */
-
-#ifndef _LTTNG_UST_EVENTS_INTERNAL_H
-#define _LTTNG_UST_EVENTS_INTERNAL_H
-
-#include <stdint.h>
-
-#include <urcu/list.h>
-#include <urcu/hlist.h>
-
-#include <lttng/ust-events.h>
-
-#include "ust-context-provider.h"
-
-struct lttng_ust_abi_obj;
-
-union lttng_ust_abi_args {
- struct {
- void *chan_data;
- int wakeup_fd;
- } channel;
- struct {
- int shm_fd;
- int wakeup_fd;
- } stream;
- struct {
- struct lttng_ust_abi_field_iter entry;
- } field_list;
- struct {
- char *ctxname;
- } app_context;
- struct {
- int event_notifier_notif_fd;
- } event_notifier_handle;
- struct {
- void *counter_data;
- } counter;
- struct {
- int shm_fd;
- } counter_shm;
-};
-
-struct lttng_ust_abi_objd_ops {
- long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
- union lttng_ust_abi_args *args, void *owner);
- int (*release)(int objd);
-};
-
-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_abi_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 */
- struct lttng_channel *chan;
- /*
- * Unused, but kept around to make it explicit that the tracer can do
- * it.
- */
- struct lttng_ctx *ctx;
-};
-
-struct lttng_event_notifier_enabler {
- struct lttng_enabler base;
- uint64_t error_counter_index;
- struct cds_list_head node; /* per-app list of event_notifier enablers */
- struct cds_list_head capture_bytecode_head;
- struct lttng_event_notifier_group *group; /* weak ref */
- uint64_t user_token; /* User-provided token */
- uint64_t num_captures;
-};
-
-enum lttng_ust_bytecode_node_type {
- LTTNG_UST_BYTECODE_NODE_TYPE_FILTER,
- LTTNG_UST_BYTECODE_NODE_TYPE_CAPTURE,
-};
-
-struct lttng_ust_bytecode_node {
- enum lttng_ust_bytecode_node_type type;
- struct cds_list_head node;
- struct lttng_enabler *enabler;
- struct {
- uint32_t len;
- uint32_t reloc_offset;
- uint64_t seqnum;
- char data[];
- } bc;
-};
-
-struct lttng_ust_excluder_node {
- struct cds_list_head node;
- struct lttng_enabler *enabler;
- /*
- * struct lttng_ust_event_exclusion had variable sized array,
- * must be last field.
- */
- struct lttng_ust_abi_event_exclusion excluder;
-};
-
-/* Data structures used by the tracer. */
-
-struct tp_list_entry {
- struct lttng_ust_abi_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_abi_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_ops {
- struct lib_counter *(*counter_create)(size_t nr_dimensions,
- const struct lttng_counter_dimension *dimensions,
- int64_t global_sum_step,
- int global_counter_fd,
- int nr_counter_cpu_fds,
- const int *counter_cpu_fds,
- bool is_daemon);
- void (*counter_destroy)(struct lib_counter *counter);
- int (*counter_add)(struct lib_counter *counter,
- const size_t *dimension_indexes, int64_t v);
- int (*counter_read)(struct lib_counter *counter,
- const size_t *dimension_indexes, int cpu,
- int64_t *value, bool *overflow, bool *underflow);
- int (*counter_aggregate)(struct lib_counter *counter,
- const size_t *dimension_indexes, int64_t *value,
- bool *overflow, bool *underflow);
- int (*counter_clear)(struct lib_counter *counter, const size_t *dimension_indexes);
-};
-
-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;
-};
-
-#define LTTNG_UST_EVENT_HT_BITS 12
-#define LTTNG_UST_EVENT_HT_SIZE (1U << LTTNG_UST_EVENT_HT_BITS)
-
-struct lttng_ust_event_ht {
- struct cds_hlist_head table[LTTNG_UST_EVENT_HT_SIZE];
-};
-
-#define LTTNG_UST_EVENT_NOTIFIER_HT_BITS 12
-#define LTTNG_UST_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_UST_EVENT_NOTIFIER_HT_BITS)
-struct lttng_ust_event_notifier_ht {
- struct cds_hlist_head table[LTTNG_UST_EVENT_NOTIFIER_HT_SIZE];
-};
-
-#define LTTNG_UST_ENUM_HT_BITS 12
-#define LTTNG_UST_ENUM_HT_SIZE (1U << LTTNG_UST_ENUM_HT_BITS)
-
-struct lttng_ust_enum_ht {
- struct cds_hlist_head table[LTTNG_UST_ENUM_HT_SIZE];
-};
-
-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_ust_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;
-};
-
-struct lttng_ust_event_common_private {
- struct lttng_ust_event_common *pub; /* Public event interface */
-
- const struct lttng_ust_event_desc *desc;
- /* Backward references: list of lttng_enabler_ref (ref to enablers) */
- struct cds_list_head enablers_ref_head;
- int registered; /* has reg'd tracepoint probe */
- uint64_t user_token;
-};
-
-struct lttng_ust_event_recorder_private {
- struct lttng_ust_event_common_private parent;
-
- struct lttng_ust_event_recorder *pub; /* Public event interface */
- struct cds_list_head node; /* Event recorder list */
- struct cds_hlist_node hlist; /* Hash table of event recorders */
-};
-
-struct lttng_ust_event_notifier_private {
- struct lttng_ust_event_common_private parent;
-
- struct lttng_ust_event_notifier *pub; /* Public event notifier interface */
- struct lttng_event_notifier_group *group; /* weak ref */
- size_t num_captures; /* Needed to allocate the msgpack array. */
- uint64_t error_counter_index;
- struct cds_list_head node; /* Event notifier list */
- struct cds_hlist_node hlist; /* Hash table of event notifiers */
-};
-
-struct lttng_ust_bytecode_runtime_private {
- struct bytecode_runtime *pub; /* Public bytecode runtime interface */
-
- struct lttng_ust_bytecode_node *bc;
- int link_failed;
- /*
- * Pointer to a URCU-protected pointer owned by an `struct
- * lttng_session`or `struct lttng_event_notifier_group`.
- */
- struct lttng_ctx **pctx;
-};
-
-struct lttng_ust_session_private {
- struct lttng_session *pub; /* Public session interface */
-
- int been_active; /* Been active ? */
- int objd; /* Object associated */
- struct cds_list_head chan_head; /* Channel list head */
- struct cds_list_head events_head; /* list of events */
- struct cds_list_head node; /* Session list */
-
- /* New UST 2.1 */
- /* List of enablers */
- struct cds_list_head enablers_head;
- struct lttng_ust_event_ht events_ht; /* ht of events */
- void *owner; /* object owner */
- int tstate:1; /* Transient enable state */
-
- /* New UST 2.4 */
- int statedump_pending:1;
-
- /* New UST 2.8 */
- struct lttng_ust_enum_ht enums_ht; /* ht of enumerations */
- struct cds_list_head enums_head;
- struct lttng_ctx *ctx; /* contexts for filters. */
-};
-
-struct lttng_enum {
- const struct lttng_ust_enum_desc *desc;
- struct lttng_session *session;
- struct cds_list_head node; /* Enum list in session */
- struct cds_hlist_node hlist; /* Session ht of enums */
- uint64_t id; /* Enumeration ID in sessiond */
-};
-
-static inline
-struct lttng_enabler *lttng_event_enabler_as_enabler(
- struct lttng_event_enabler *event_enabler)
-{
- return &event_enabler->base;
-}
-
-static inline
-struct lttng_enabler *lttng_event_notifier_enabler_as_enabler(
- struct lttng_event_notifier_enabler *event_notifier_enabler)
-{
- return &event_notifier_enabler->base;
-}
-
-/*
- * Allocate and initialize a `struct lttng_event_enabler` object.
- *
- * On success, returns a `struct lttng_event_enabler`,
- * On memory error, returns NULL.
- */
-__attribute__((visibility("hidden")))
-struct lttng_event_enabler *lttng_event_enabler_create(
- enum lttng_enabler_format_type format_type,
- struct lttng_ust_abi_event *event_param,
- struct lttng_channel *chan);
-
-/*
- * Destroy a `struct lttng_event_enabler` object.
- */
-__attribute__((visibility("hidden")))
-void lttng_event_enabler_destroy(struct lttng_event_enabler *enabler);
-
-/*
- * Enable a `struct lttng_event_enabler` object and all events related to this
- * enabler.
- */
-__attribute__((visibility("hidden")))
-int lttng_event_enabler_enable(struct lttng_event_enabler *enabler);
-
-/*
- * Disable a `struct lttng_event_enabler` object and all events related to this
- * enabler.
- */
-__attribute__((visibility("hidden")))
-int lttng_event_enabler_disable(struct lttng_event_enabler *enabler);
-
-/*
- * Attach filter bytecode program to `struct lttng_event_enabler` and all
- * events related to this enabler.
- */
-__attribute__((visibility("hidden")))
-int lttng_event_enabler_attach_filter_bytecode(
- struct lttng_event_enabler *enabler,
- struct lttng_ust_bytecode_node **bytecode);
-
-/*
- * Attach an application context to an event enabler.
- *
- * Not implemented.
- */
-__attribute__((visibility("hidden")))
-int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler,
- struct lttng_ust_abi_context *ctx);
-
-/*
- * Attach exclusion list to `struct lttng_event_enabler` and all
- * events related to this enabler.
- */
-__attribute__((visibility("hidden")))
-int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *enabler,
- struct lttng_ust_excluder_node **excluder);
-
-/*
- * Synchronize bytecodes for the enabler and the instance (event or
- * event_notifier).
- *
- * This function goes over all bytecode programs of the enabler (event or
- * event_notifier enabler) to ensure each is linked to the provided instance.
- */
-__attribute__((visibility("hidden")))
-void lttng_enabler_link_bytecode(const struct lttng_ust_event_desc *event_desc,
- struct lttng_ctx **ctx,
- struct cds_list_head *instance_bytecode_runtime_head,
- struct cds_list_head *enabler_bytecode_runtime_head);
-
-/*
- * Allocate and initialize a `struct lttng_event_notifier_group` object.
- *
- * On success, returns a `struct lttng_triggre_group`,
- * on memory error, returns NULL.
- */
-__attribute__((visibility("hidden")))
-struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
-
-/*
- * Destroy a `struct lttng_event_notifier_group` object.
- */
-__attribute__((visibility("hidden")))
-void lttng_event_notifier_group_destroy(
- struct lttng_event_notifier_group *event_notifier_group);
-
-/*
- * Allocate and initialize a `struct lttng_event_notifier_enabler` object.
- *
- * On success, returns a `struct lttng_event_notifier_enabler`,
- * On memory error, returns NULL.
- */
-__attribute__((visibility("hidden")))
-struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
- struct lttng_event_notifier_group *event_notifier_group,
- enum lttng_enabler_format_type format_type,
- struct lttng_ust_abi_event_notifier *event_notifier_param);
-
-/*
- * Destroy a `struct lttng_event_notifier_enabler` object.
- */
-__attribute__((visibility("hidden")))
-void lttng_event_notifier_enabler_destroy(
- struct lttng_event_notifier_enabler *event_notifier_enabler);
-
-/*
- * Enable a `struct lttng_event_notifier_enabler` object and all event
- * notifiers related to this enabler.
- */
-__attribute__((visibility("hidden")))
-int lttng_event_notifier_enabler_enable(
- struct lttng_event_notifier_enabler *event_notifier_enabler);
-
-/*
- * Disable a `struct lttng_event_notifier_enabler` object and all event
- * notifiers related to this enabler.
- */
-__attribute__((visibility("hidden")))
-int lttng_event_notifier_enabler_disable(
- struct lttng_event_notifier_enabler *event_notifier_enabler);
-
-/*
- * Attach filter bytecode program to `struct lttng_event_notifier_enabler` and
- * all event notifiers related to this enabler.
- */
-__attribute__((visibility("hidden")))
-int lttng_event_notifier_enabler_attach_filter_bytecode(
- struct lttng_event_notifier_enabler *event_notifier_enabler,
- struct lttng_ust_bytecode_node **bytecode);
-
-/*
- * Attach capture bytecode program to `struct lttng_event_notifier_enabler` and
- * all event_notifiers related to this enabler.
- */
-__attribute__((visibility("hidden")))
-int lttng_event_notifier_enabler_attach_capture_bytecode(
- struct lttng_event_notifier_enabler *event_notifier_enabler,
- struct lttng_ust_bytecode_node **bytecode);
-
-/*
- * Attach exclusion list to `struct lttng_event_notifier_enabler` and all
- * event notifiers related to this enabler.
- */
-__attribute__((visibility("hidden")))
-int lttng_event_notifier_enabler_attach_exclusion(
- struct lttng_event_notifier_enabler *event_notifier_enabler,
- struct lttng_ust_excluder_node **excluder);
-
-__attribute__((visibility("hidden")))
-void lttng_free_event_filter_runtime(struct lttng_ust_event_common *event);
-
-/*
- * Connect the probe on all enablers matching this event description.
- * Called on library load.
- */
-__attribute__((visibility("hidden")))
-int lttng_fix_pending_event_notifiers(void);
-
-__attribute__((visibility("hidden")))
-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
-
-__attribute__((visibility("hidden")))
-int lttng_add_perf_counter_to_ctx(uint32_t type,
- uint64_t config,
- const char *name,
- struct lttng_ctx **ctx);
-
-__attribute__((visibility("hidden")))
-int lttng_perf_counter_init(void);
-
-__attribute__((visibility("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 */
-
-__attribute__((visibility("hidden")))
-int lttng_probes_get_event_list(struct lttng_ust_tracepoint_list *list);
-
-__attribute__((visibility("hidden")))
-void lttng_probes_prune_event_list(struct lttng_ust_tracepoint_list *list);
-
-__attribute__((visibility("hidden")))
-int lttng_probes_get_field_list(struct lttng_ust_field_list *list);
-
-__attribute__((visibility("hidden")))
-void lttng_probes_prune_field_list(struct lttng_ust_field_list *list);
-
-__attribute__((visibility("hidden")))
-struct lttng_ust_abi_tracepoint_iter *
- lttng_ust_tracepoint_list_get_iter_next(struct lttng_ust_tracepoint_list *list);
-
-__attribute__((visibility("hidden")))
-struct lttng_ust_abi_field_iter *
- lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list *list);
-
-__attribute__((visibility("hidden")))
-struct lttng_session *lttng_session_create(void);
-
-__attribute__((visibility("hidden")))
-int lttng_session_enable(struct lttng_session *session);
-
-__attribute__((visibility("hidden")))
-int lttng_session_disable(struct lttng_session *session);
-
-__attribute__((visibility("hidden")))
-int lttng_session_statedump(struct lttng_session *session);
-
-__attribute__((visibility("hidden")))
-void lttng_session_destroy(struct lttng_session *session);
-
-/*
- * Called with ust lock held.
- */
-__attribute__((visibility("hidden")))
-int lttng_session_active(void);
-
-__attribute__((visibility("hidden")))
-struct cds_list_head *lttng_get_sessions(void);
-
-__attribute__((visibility("hidden")))
-void lttng_handle_pending_statedump(void *owner);
-
-__attribute__((visibility("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);
-
-__attribute__((visibility("hidden")))
-int lttng_channel_enable(struct lttng_channel *channel);
-
-__attribute__((visibility("hidden")))
-int lttng_channel_disable(struct lttng_channel *channel);
-
-__attribute__((visibility("hidden")))
-void lttng_transport_register(struct lttng_transport *transport);
-
-__attribute__((visibility("hidden")))
-void lttng_transport_unregister(struct lttng_transport *transport);
-
-/* This is ABI between liblttng-ust and liblttng-ust-ctl */
-struct lttng_transport *lttng_ust_transport_find(const char *name);
-
-/* This is ABI between liblttng-ust and liblttng-ust-dl */
-void lttng_ust_dl_update(void *ip);
-
-__attribute__((visibility("hidden")))
-void lttng_probe_provider_unregister_events(struct lttng_ust_probe_desc *desc);
-
-__attribute__((visibility("hidden")))
-int lttng_fix_pending_events(void);
-
-__attribute__((visibility("hidden")))
-struct cds_list_head *lttng_get_probe_list_head(void);
-
-__attribute__((visibility("hidden")))
-struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_session *session,
- const struct lttng_ust_enum_desc *enum_desc);
-
-__attribute__((visibility("hidden")))
-int lttng_abi_create_root_handle(void);
-
-__attribute__((visibility("hidden")))
-const struct lttng_ust_abi_objd_ops *lttng_ust_abi_objd_ops(int id);
-
-__attribute__((visibility("hidden")))
-int lttng_ust_abi_objd_unref(int id, int is_owner);
-
-__attribute__((visibility("hidden")))
-void lttng_ust_abi_exit(void);
-
-__attribute__((visibility("hidden")))
-void lttng_ust_abi_events_exit(void);
-
-__attribute__((visibility("hidden")))
-void lttng_ust_abi_objd_table_owner_cleanup(void *owner);
-
-#endif /* _LTTNG_UST_EVENTS_INTERNAL_H */
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