X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;ds=inline;f=include%2Flttng%2Fust-events.h;h=809c056d660662b5ac537e6798811a85c939e940;hb=cbba5e044240cd4e5b90b1a312cb1cd692e027ea;hp=164c82c4c8288617702a56edc5eec30ba341b6aa;hpb=891d6b550bf16672b0c3a7b35362f231d6e10fc1;p=lttng-ust.git diff --git a/include/lttng/ust-events.h b/include/lttng/ust-events.h index 164c82c4..809c056d 100644 --- a/include/lttng/ust-events.h +++ b/include/lttng/ust-events.h @@ -362,14 +362,18 @@ struct lttng_interpreter_output; struct lttng_ust_bytecode_runtime_private; /* - * 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. + * 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_bytecode_runtime { - struct lttng_ust_bytecode_runtime_private *priv; +struct lttng_ust_bytecode_runtime { + uint32_t struct_size; /* Size of this structure. */ + struct lttng_ust_bytecode_runtime_private *priv; /* Associated bytecode */ union { uint64_t (*filter)(void *interpreter_data, @@ -379,6 +383,8 @@ struct lttng_bytecode_runtime { struct lttng_interpreter_output *interpreter_output); } interpreter_funcs; struct cds_list_head node; /* list of bytecode runtime in event */ + + /* End of base ABI. Fields below should be used after checking struct_size. */ }; /* @@ -421,7 +427,7 @@ struct lttng_ust_event_common { int enabled; int has_enablers_without_bytecode; - /* list of struct lttng_bytecode_runtime, sorted by seqnum */ + /* list of struct lttng_ust_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. */ @@ -473,6 +479,7 @@ struct lttng_ust_event_notifier_private; */ 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 */ @@ -483,14 +490,6 @@ struct lttng_ust_event_notifier { /* End of base ABI. Fields below should be used after checking struct_size. */ }; -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 */ -}; - struct channel; struct lttng_ust_shm_handle; @@ -498,8 +497,14 @@ struct lttng_ust_shm_handle; * 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_channel_ops { +struct lttng_ust_channel_ops { + uint32_t struct_size; + struct lttng_channel *(*channel_create)(const char *name, void *buf_addr, size_t subbuf_size, size_t num_subbuf, @@ -527,6 +532,8 @@ struct lttng_channel_ops { int (*flush_buffer)(struct channel *chan, struct lttng_ust_shm_handle *handle); void (*event_strcpy)(struct lttng_ust_lib_ring_buffer_ctx *ctx, const char *src, size_t len); + + /* End of base ABI. Fields below should be used after checking struct_size. */ }; /* @@ -548,7 +555,7 @@ struct lttng_channel { struct lttng_session *session; int objd; /* Object associated to channel */ struct cds_list_head node; /* Channel list in session */ - const struct lttng_channel_ops *ops; + const struct lttng_ust_channel_ops *ops; int header_type; /* 0: unset, 1: compact, 2: large */ struct lttng_ust_shm_handle *handle; /* shared-memory handle */ @@ -559,54 +566,23 @@ struct lttng_channel { int tstate:1; /* Transient enable state */ }; -struct lttng_counter_dimension; - -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); -}; +/* + * 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_stack_ctx { + uint32_t struct_size; /* Size of this structure */ -#define LTTNG_UST_STACK_CTX_PADDING 32 -struct lttng_stack_ctx { 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]; -}; - -#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]; + /* End of base ABI. Fields below should be used after checking struct_size. */ }; struct lttng_ust_session_private; @@ -633,15 +609,12 @@ int lttng_ust_probe_register(struct lttng_ust_probe_desc *desc); void lttng_ust_probe_unregister(struct lttng_ust_probe_desc *desc); /* - * Can be used by applications that change their procname to clear the ust cached value. + * Applications that change their procname and need the new value to be + * reflected in the procname event context have to call this function to clear + * the internally cached value. This should not be called from a signal + * handler. */ -void lttng_context_procname_reset(void); - -struct lttng_transport *lttng_transport_find(const char *name); - -int lttng_session_active(void); - -void lttng_ust_dl_update(void *ip); +void lttng_ust_context_procname_reset(void); #ifdef __cplusplus }