X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=include%2Flttng%2Fust-events.h;h=164c82c4c8288617702a56edc5eec30ba341b6aa;hb=891d6b550bf16672b0c3a7b35362f231d6e10fc1;hp=c77b39c79d697fac33d87eea509e954949d3e5f6;hpb=67d4e8f5512220b8a33a058b7133fce7595c4fa2;p=lttng-ust.git diff --git a/include/lttng/ust-events.h b/include/lttng/ust-events.h index c77b39c7..164c82c4 100644 --- a/include/lttng/ust-events.h +++ b/include/lttng/ust-events.h @@ -1,37 +1,18 @@ -#ifndef _LTTNG_UST_EVENTS_H -#define _LTTNG_UST_EVENTS_H - /* - * lttng/ust-events.h + * SPDX-License-Identifier: MIT * - * Copyright 2010-2012 (c) - Mathieu Desnoyers + * Copyright (C) 2010-2012 Mathieu Desnoyers * * Holds LTTng per-session event registry. - * - * 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. - * - * 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. */ +#ifndef _LTTNG_UST_EVENTS_H +#define _LTTNG_UST_EVENTS_H + #include #include #include #include -#include #include #include #include @@ -62,9 +43,7 @@ extern "C" { struct lttng_channel; struct lttng_session; struct lttng_ust_lib_ring_buffer_ctx; -struct lttng_ust_context_app; -struct lttng_event_field; -struct lttng_event_notifier; +struct lttng_ust_event_field; struct lttng_event_notifier_group; /* @@ -72,31 +51,14 @@ struct lttng_event_notifier_group; * tracer. Those structures have padding for future extension. */ -/* - * LTTng client type enumeration. Used by the consumer to map the - * callbacks from its own address space. - */ -enum lttng_client_types { - LTTNG_CLIENT_METADATA = 0, - LTTNG_CLIENT_DISCARD = 1, - LTTNG_CLIENT_OVERWRITE = 2, - LTTNG_CLIENT_DISCARD_RT = 3, - LTTNG_CLIENT_OVERWRITE_RT = 4, - LTTNG_NR_CLIENT_TYPES, -}; - /* Type description */ /* Update the astract_types name table in lttng-types.c along with this enum */ enum lttng_abstract_types { atype_integer, - atype_enum, /* legacy */ - atype_array, /* legacy */ - atype_sequence, /* legacy */ atype_string, atype_float, atype_dynamic, - atype_struct, /* legacy */ atype_enum_nestable, atype_array_nestable, atype_sequence_nestable, @@ -121,16 +83,26 @@ enum lttng_enum_entry_options { LTTNG_ENUM_ENTRY_OPTION_IS_AUTO = 1U << 0, }; -#define LTTNG_UST_ENUM_ENTRY_PADDING 16 -struct lttng_enum_entry { +/* + * Enumeration entry description + * + * IMPORTANT: this structure is part of the ABI between the probe and + * UST. Fields need to be only added at the end, never reordered, never + * removed. + * + * The field @struct_size should be used to determine the size of the + * structure. It should be queried before using additional fields added + * at the end of the structure. + */ + +struct lttng_ust_enum_entry { + uint32_t struct_size; + struct lttng_enum_value start, end; /* start and end are inclusive */ const char *string; - union { - struct { - unsigned int options; - } LTTNG_PACKED extra; - char padding[LTTNG_UST_ENUM_ENTRY_PADDING]; - } u; + unsigned int options; + + /* End of base ABI. Fields below should be used after checking struct_size. */ }; #define __type_integer(_type, _byte_order, _base, _encoding) \ @@ -195,29 +167,6 @@ struct lttng_float_type { char padding[LTTNG_UST_FLOAT_TYPE_PADDING]; }; -/* legacy */ -#define LTTNG_UST_BASIC_TYPE_PADDING 128 -union _lttng_basic_type { - struct lttng_integer_type integer; /* legacy */ - struct { - const struct lttng_enum_desc *desc; /* Enumeration mapping */ - struct lttng_integer_type container_type; - } enumeration; /* legacy */ - struct { - enum lttng_string_encodings encoding; - } string; /* legacy */ - struct lttng_float_type _float; /* legacy */ - char padding[LTTNG_UST_BASIC_TYPE_PADDING]; -}; - -/* legacy */ -struct lttng_basic_type { - enum lttng_abstract_types atype; - union { - union _lttng_basic_type basic; - } u; -}; - #define LTTNG_UST_TYPE_PADDING 128 struct lttng_type { enum lttng_abstract_types atype; @@ -229,7 +178,7 @@ struct lttng_type { enum lttng_string_encodings encoding; } string; struct { - const struct lttng_enum_desc *desc; /* Enumeration mapping */ + const struct lttng_ust_enum_desc *desc; /* Enumeration mapping */ struct lttng_type *container_type; } enum_nestable; struct { @@ -244,36 +193,34 @@ struct lttng_type { } sequence_nestable; struct { unsigned int nr_fields; - const struct lttng_event_field *fields; /* Array of fields. */ + const struct lttng_ust_event_field **fields; /* Array of pointers to fields. */ unsigned int alignment; } struct_nestable; - union { - /* legacy provider ABI 1.0 */ - union _lttng_basic_type basic; /* legacy */ - struct { - struct lttng_basic_type elem_type; - unsigned int length; /* Num. elems. */ - } array; /* legacy */ - struct { - struct lttng_basic_type length_type; - struct lttng_basic_type elem_type; - } sequence; /* legacy */ - struct { - unsigned int nr_fields; - struct lttng_event_field *fields; /* Array of fields. */ - } _struct; /* legacy */ - } legacy; char padding[LTTNG_UST_TYPE_PADDING]; } u; }; -#define LTTNG_UST_ENUM_TYPE_PADDING 24 -struct lttng_enum_desc { +/* + * Enumeration description + * + * IMPORTANT: this structure is part of the ABI between the probe and + * UST. Fields need to be only added at the end, never reordered, never + * removed. + * + * The field @struct_size should be used to determine the size of the + * structure. It should be queried before using additional fields added + * at the end of the structure. + */ + +struct lttng_ust_enum_desc { + uint32_t struct_size; + const char *name; - const struct lttng_enum_entry *entries; + const struct lttng_ust_enum_entry **entries; unsigned int nr_entries; - char padding[LTTNG_UST_ENUM_TYPE_PADDING]; + + /* End of base ABI. Fields below should be used after checking struct_size. */ }; /* @@ -282,19 +229,21 @@ struct lttng_enum_desc { * IMPORTANT: this structure is part of the ABI between the probe and * UST. Fields need to be only added at the end, never reordered, never * removed. + * + * The field @struct_size should be used to determine the size of the + * structure. It should be queried before using additional fields added + * at the end of the structure. */ -#define LTTNG_UST_EVENT_FIELD_PADDING 28 -struct lttng_event_field { +struct lttng_ust_event_field { + uint32_t struct_size; + const char *name; struct lttng_type type; - unsigned int nowrite; /* do not write into trace */ - union { - struct { - unsigned int nofilter:1; /* do not consider for filter */ - } ext; - char padding[LTTNG_UST_EVENT_FIELD_PADDING]; - } u; + unsigned int nowrite:1, /* do not write into trace */ + nofilter:1; /* do not consider for filter */ + + /* End of base ABI. Fields below should be used after checking struct_size. */ }; enum lttng_ust_dynamic_type { @@ -327,7 +276,7 @@ struct lttng_perf_counter_field; #define LTTNG_UST_CTX_FIELD_PADDING 40 struct lttng_ctx_field { - struct lttng_event_field event_field; + struct lttng_ust_event_field event_field; size_t (*get_size)(struct lttng_ctx_field *field, size_t offset); void (*record)(struct lttng_ctx_field *field, struct lttng_ust_lib_ring_buffer_ctx *ctx, @@ -351,82 +300,54 @@ struct lttng_ctx { char padding[LTTNG_UST_CTX_PADDING]; }; -#define LTTNG_UST_EVENT_DESC_PADDING 40 -struct lttng_event_desc { +/* + * IMPORTANT: this structure is part of the ABI between the probe and + * UST. Fields need to be only added at the end, never reordered, never + * removed. + * + * The field @struct_size should be used to determine the size of the + * structure. It should be queried before using additional fields added + * at the end of the structure. + */ +struct lttng_ust_event_desc { + uint32_t struct_size; /* Size of this structure. */ const char *name; void (*probe_callback)(void); const struct lttng_event_ctx *ctx; /* context */ - const struct lttng_event_field *fields; /* event payload */ + const struct lttng_ust_event_field **fields; /* event payload */ unsigned int nr_fields; const int **loglevel; - const char *signature; /* Argument types/names received */ - union { - struct { - const char **model_emf_uri; - void (*event_notifier_callback)(void); - } ext; - char padding[LTTNG_UST_EVENT_DESC_PADDING]; - } u; + const char *signature; /* Argument types/names received */ + const char **model_emf_uri; + + /* End of base ABI. Fields below should be used after checking struct_size. */ }; -#define LTTNG_UST_PROBE_DESC_PADDING 12 -struct lttng_probe_desc { +/* + * IMPORTANT: this structure is part of the ABI between the probe and + * UST. Fields need to be only added at the end, never reordered, never + * removed. + * + * The field @struct_size should be used to determine the size of the + * structure. It should be queried before using additional fields added + * at the end of the structure. + */ +struct lttng_ust_probe_desc { + uint32_t struct_size; /* Size of this structure. */ + const char *provider; - const struct lttng_event_desc **event_desc; + const struct lttng_ust_event_desc **event_desc; unsigned int nr_events; struct cds_list_head head; /* chain registered probes */ struct cds_list_head lazy_init_head; int lazy; /* lazy registration */ uint32_t major; uint32_t minor; - char padding[LTTNG_UST_PROBE_DESC_PADDING]; -}; - -/* Data structures used by the tracer. */ - -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 tp_list_entry { - struct lttng_ust_tracepoint_iter tp; - struct cds_list_head head; + /* End of base ABI. Fields below should be used after checking struct_size. */ }; -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; -}; - -struct ust_pending_probe; -struct lttng_event; +/* Data structures used by the tracer. */ /* * Bytecode interpreter return value masks. @@ -438,16 +359,18 @@ enum lttng_bytecode_interpreter_ret { }; struct lttng_interpreter_output; +struct lttng_ust_bytecode_runtime_private; /* - * This structure is used in the probes. More specifically, the `filter` and - * `node` fields are explicity used in the probes. When modifying this - * structure we must not change the layout of these two fields as it is - * considered ABI. + * This structure is used in the probes. More specifically, the + * `interpreter_funcs` and `node` fields are explicity used in the + * probes. When modifying this structure we must not change the layout + * of these two fields as it is considered ABI. */ struct lttng_bytecode_runtime { + struct lttng_ust_bytecode_runtime_private *priv; + /* Associated bytecode */ - struct lttng_ust_bytecode_node *bc; union { uint64_t (*filter)(void *interpreter_data, const char *interpreter_stack_data); @@ -455,75 +378,113 @@ struct lttng_bytecode_runtime { const char *interpreter_stack_data, struct lttng_interpreter_output *interpreter_output); } interpreter_funcs; - int link_failed; struct cds_list_head node; /* list of bytecode runtime in event */ - /* - * Pointer to a URCU-protected pointer owned by an `struct - * lttng_session`or `struct lttng_event_notifier_group`. - */ - struct lttng_ctx **pctx; }; /* - * 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. + * lttng_event structure is referred to by the tracing fast path. It + * must be kept small. * - * For example, event rules "my_app:a*" and "my_app:ab*" will both match the - * event with the name "my_app:abc". + * IMPORTANT: this structure is part of the ABI between the probe and + * UST. Fields need to be only added at the end, never reordered, never + * removed. */ -struct lttng_enabler_ref { - struct cds_list_head node; /* enabler ref list */ - struct lttng_enabler *ref; /* backward ref */ + +struct lttng_ust_event_common_private; + +enum lttng_ust_event_type { + LTTNG_UST_EVENT_TYPE_RECORDER = 0, + LTTNG_UST_EVENT_TYPE_NOTIFIER = 1, }; /* - * lttng_event structure is referred to by the tracing fast path. It - * must be kept small. + * IMPORTANT: this structure is part of the ABI between the probe and + * UST. Fields need to be only added at the end, never reordered, never + * removed. * + * struct lttng_ust_event_common is the common ancestor of the various + * public event actions. Inheritance is done by composition: The parent + * has a pointer to its child, and the child has a pointer to its + * parent. Inheritance of those public structures is done by composition + * to ensure both parent and child structures can be extended. + * + * The field @struct_size should be used to determine the size of the + * structure. It should be queried before using additional fields added + * at the end of the structure. + */ +struct lttng_ust_event_common { + uint32_t struct_size; /* Size of this structure. */ + struct lttng_ust_event_common_private *priv; /* Private event interface */ + + enum lttng_ust_event_type type; + void *child; /* Pointer to child, for inheritance by aggregation. */ + + int enabled; + int has_enablers_without_bytecode; + /* list of struct lttng_bytecode_runtime, sorted by seqnum */ + struct cds_list_head filter_bytecode_runtime_head; + + /* End of base ABI. Fields below should be used after checking struct_size. */ +}; + +struct lttng_ust_event_recorder_private; + +/* * IMPORTANT: this structure is part of the ABI between the probe and * UST. Fields need to be only added at the end, never reordered, never * removed. + * + * struct lttng_ust_event_recorder is the action for recording events + * into a ring buffer. It inherits from struct lttng_ust_event_common + * by composition to ensure both parent and child structure are + * extensible. + * + * The field @struct_size should be used to determine the size of the + * structure. It should be queried before using additional fields added + * at the end of the structure. */ -struct lttng_event { +struct lttng_ust_event_recorder { + uint32_t struct_size; /* Size of this structure. */ + struct lttng_ust_event_common *parent; /* Inheritance by aggregation. */ + struct lttng_ust_event_recorder_private *priv; /* Private event record interface */ + unsigned int id; struct lttng_channel *chan; - int enabled; - const struct lttng_event_desc *desc; struct lttng_ctx *ctx; - enum lttng_ust_instrumentation instrumentation; - struct cds_list_head node; /* Event list in session */ - /* list of struct lttng_bytecode_runtime, sorted by seqnum */ - struct cds_list_head filter_bytecode_runtime_head; - int has_enablers_without_bytecode; - /* Backward references: list of lttng_enabler_ref (ref to enablers) */ - struct cds_list_head enablers_ref_head; - struct cds_hlist_node hlist; /* session ht of events */ - int registered; /* has reg'd tracepoint probe */ + /* End of base ABI. Fields below should be used after checking struct_size. */ }; -struct lttng_event_notifier { - uint64_t user_token; - uint64_t error_counter_index; - int enabled; - int registered; /* has reg'd tracepoint probe */ - size_t num_captures; /* Needed to allocate the msgpack array. */ - void (*notification_send)(struct lttng_event_notifier *event_notifier, +struct lttng_ust_event_notifier_private; + +/* + * IMPORTANT: this structure is part of the ABI between the probe and + * UST. Fields need to be only added at the end, never reordered, never + * removed. + * + * struct lttng_ust_event_notifier is the action for sending + * notifications. It inherits from struct lttng_ust_event_common + * by composition to ensure both parent and child structure are + * extensible. + * + * The field @struct_size should be used to determine the size of the + * structure. It should be queried before using additional fields added + * at the end of the structure. + */ +struct lttng_ust_event_notifier { + uint32_t struct_size; /* Size of this structure. */ + struct lttng_ust_event_common *parent; /* Inheritance by aggregation. */ + struct lttng_ust_event_notifier_private *priv; /* Private event notifier interface */ + + void (*notification_send)(struct lttng_ust_event_notifier *event_notifier, const char *stack_data); - struct cds_list_head filter_bytecode_runtime_head; struct cds_list_head capture_bytecode_runtime_head; - int has_enablers_without_bytecode; - struct cds_list_head enablers_ref_head; - const struct lttng_event_desc *desc; - struct cds_hlist_node hlist; /* hashtable of event_notifiers */ - struct cds_list_head node; /* event_notifier list in session */ - struct lttng_event_notifier_group *group; /* weak ref */ + + /* End of base ABI. Fields below should be used after checking struct_size. */ }; struct lttng_enum { - const struct lttng_enum_desc *desc; + 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 */ @@ -593,20 +554,12 @@ struct lttng_channel { /* Channel ID */ unsigned int id; - enum lttng_ust_chan_type type; + enum lttng_ust_abi_chan_type type; unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */ int tstate:1; /* Transient enable state */ }; -#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_dimension; struct lttng_counter_ops { struct lib_counter *(*counter_create)(size_t nr_dimensions, @@ -630,7 +583,7 @@ struct lttng_counter_ops { #define LTTNG_UST_STACK_CTX_PADDING 32 struct lttng_stack_ctx { - struct lttng_event *event; + struct lttng_ust_event_recorder *event_recorder; struct lttng_ctx *chan_ctx; /* RCU dereferenced. */ struct lttng_ctx *event_ctx; /* RCU dereferenced. */ char padding[LTTNG_UST_STACK_CTX_PADDING]; @@ -656,202 +609,39 @@ struct lttng_ust_enum_ht { struct cds_hlist_head table[LTTNG_UST_ENUM_HT_SIZE]; }; +struct lttng_ust_session_private; + /* * IMPORTANT: this structure is part of the ABI between the probe and * UST. Fields need to be only added at the end, never reordered, never * removed. + * + * The field @struct_size should be used to determine the size of the + * structure. It should be queried before using additional fields added + * at the end of the structure. */ struct lttng_session { - int active; /* Is trace session active ? */ - 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_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; -}; + uint32_t struct_size; /* Size of this structure */ + struct lttng_ust_session_private *priv; /* Private session interface */ -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; -}; + int active; /* Is trace session active ? */ -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; + /* End of base ABI. Fields below should be used after checking struct_size. */ }; -struct lttng_counter_transport { - char *name; - struct cds_list_head node; - struct lttng_counter_ops ops; - const struct lib_counter_config *client_config; -}; +int lttng_ust_probe_register(struct lttng_ust_probe_desc *desc); +void lttng_ust_probe_unregister(struct lttng_ust_probe_desc *desc); -struct lttng_session *lttng_session_create(void); -int lttng_session_enable(struct lttng_session *session); -int lttng_session_disable(struct lttng_session *session); -int lttng_session_statedump(struct lttng_session *session); -void lttng_session_destroy(struct lttng_session *session); - -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); - -int lttng_channel_enable(struct lttng_channel *channel); -int lttng_channel_disable(struct lttng_channel *channel); - -int lttng_attach_context(struct lttng_ust_context *context_param, - union ust_args *uargs, - struct lttng_ctx **ctx, struct lttng_session *session); -void lttng_transport_register(struct lttng_transport *transport); -void lttng_transport_unregister(struct lttng_transport *transport); - -int lttng_probe_register(struct lttng_probe_desc *desc); -void lttng_probe_unregister(struct lttng_probe_desc *desc); -void lttng_probe_provider_unregister_events(struct lttng_probe_desc *desc); -int lttng_fix_pending_events(void); -int lttng_probes_init(void); -void lttng_probes_exit(void); -int lttng_find_context(struct lttng_ctx *ctx, const char *name); -int lttng_get_context_index(struct lttng_ctx *ctx, const char *name); -struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx_p); -void lttng_context_update(struct lttng_ctx *ctx); -void lttng_remove_context_field(struct lttng_ctx **ctx_p, - struct lttng_ctx_field *field); -void lttng_destroy_context(struct lttng_ctx *ctx); -int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); -int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); -int lttng_add_pthread_id_to_ctx(struct lttng_ctx **ctx); -int lttng_add_procname_to_ctx(struct lttng_ctx **ctx); -int lttng_add_ip_to_ctx(struct lttng_ctx **ctx); -int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx); -int lttng_add_dyntest_to_ctx(struct lttng_ctx **ctx); -int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx); -int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx); -int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx); -int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx); -int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx); -int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx); -int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx); -int lttng_add_vuid_to_ctx(struct lttng_ctx **ctx); -int lttng_add_veuid_to_ctx(struct lttng_ctx **ctx); -int lttng_add_vsuid_to_ctx(struct lttng_ctx **ctx); -int lttng_add_vgid_to_ctx(struct lttng_ctx **ctx); -int lttng_add_vegid_to_ctx(struct lttng_ctx **ctx); -int lttng_add_vsgid_to_ctx(struct lttng_ctx **ctx); -void lttng_context_vtid_reset(void); -void lttng_context_vpid_reset(void); +/* + * Can be used by applications that change their procname to clear the ust cached value. + */ void lttng_context_procname_reset(void); -void lttng_context_cgroup_ns_reset(void); -void lttng_context_ipc_ns_reset(void); -void lttng_context_mnt_ns_reset(void); -void lttng_context_net_ns_reset(void); -void lttng_context_pid_ns_reset(void); -void lttng_context_user_ns_reset(void); -void lttng_context_uts_ns_reset(void); -void lttng_context_vuid_reset(void); -void lttng_context_veuid_reset(void); -void lttng_context_vsuid_reset(void); -void lttng_context_vgid_reset(void); -void lttng_context_vegid_reset(void); -void lttng_context_vsgid_reset(void); - -#ifdef LTTNG_UST_HAVE_PERF_EVENT -int lttng_add_perf_counter_to_ctx(uint32_t type, - uint64_t config, - const char *name, - struct lttng_ctx **ctx); -int lttng_perf_counter_init(void); -void lttng_perf_counter_exit(void); -#else /* #ifdef LTTNG_UST_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 LTTNG_UST_HAVE_PERF_EVENT */ - -extern const struct lttng_ust_client_lib_ring_buffer_client_cb *lttng_client_callbacks_metadata; -extern const struct lttng_ust_client_lib_ring_buffer_client_cb *lttng_client_callbacks_discard; -extern const struct lttng_ust_client_lib_ring_buffer_client_cb *lttng_client_callbacks_overwrite; struct lttng_transport *lttng_transport_find(const char *name); -int lttng_probes_get_event_list(struct lttng_ust_tracepoint_list *list); -void lttng_probes_prune_event_list(struct lttng_ust_tracepoint_list *list); -struct lttng_ust_tracepoint_iter * - lttng_ust_tracepoint_list_get_iter_next(struct lttng_ust_tracepoint_list *list); -int lttng_probes_get_field_list(struct lttng_ust_field_list *list); -void lttng_probes_prune_field_list(struct lttng_ust_field_list *list); -struct lttng_ust_field_iter * - lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list *list); - -void lttng_free_event_filter_runtime(struct lttng_event *event); - -struct cds_list_head *lttng_get_probe_list_head(void); int lttng_session_active(void); -typedef int (*t_statedump_func_ptr)(struct lttng_session *session); -void lttng_handle_pending_statedump(void *owner); -struct cds_list_head *_lttng_get_sessions(void); - -struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_session *session, - const struct lttng_enum_desc *enum_desc); - void lttng_ust_dl_update(void *ip); -void lttng_ust_fixup_fd_tracker_tls(void); #ifdef __cplusplus }