X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=ltt-events.h;h=955611e969e466e3414f2d7c90149f9833e2a17a;hb=e8951e63e00a0b56d8ce1b0c821e5ebfb1e35d63;hp=6bdacf6ec76d8ba8050fd4374213585323a9cc45;hpb=ba1f598672d39e16402219556a911edf3a7fb7c8;p=lttng-modules.git diff --git a/ltt-events.h b/ltt-events.h index 6bdacf6e..955611e9 100644 --- a/ltt-events.h +++ b/ltt-events.h @@ -7,17 +7,23 @@ * Copyright 2010 (c) - Mathieu Desnoyers * * Holds LTTng per-session event registry. + * + * Dual LGPL v2.1/GPL v2 license. */ #include -#include #include -#include "ltt-debugfs-abi.h" +#include "wrapper/uuid.h" +#include "lttng-abi.h" + +#undef is_signed_type +#define is_signed_type(type) (((type)(-1)) < 0) struct ltt_channel; struct ltt_session; struct lib_ring_buffer_ctx; struct perf_event; +struct perf_event_attr; /* Type description */ @@ -44,25 +50,25 @@ struct lttng_enum_entry { const char *string; }; -#define __type_integer(_type, _byte_order, _base) \ +#define __type_integer(_type, _byte_order, _base, _encoding) \ { \ .atype = atype_integer, \ .u.basic.integer = \ { \ - .size = sizeof(_type), \ + .size = sizeof(_type) * CHAR_BIT, \ .alignment = ltt_alignof(_type) * CHAR_BIT, \ .signedness = is_signed_type(_type), \ .reverse_byte_order = _byte_order != __BYTE_ORDER, \ .base = _base, \ - .encoding = lttng_encode_none, \ + .encoding = lttng_encode_##_encoding, \ }, \ } \ struct lttng_integer_type { unsigned int size; /* in bits */ unsigned short alignment; /* in bits */ - unsigned int signedness:1; - unsigned int reverse_byte_order:1; + unsigned int signedness:1, + reverse_byte_order:1; unsigned int base; /* 2, 8, 10, 16, for pretty print */ enum lttng_string_encodings encoding; }; @@ -113,20 +119,31 @@ struct lttng_event_field { struct lttng_type type; }; +/* + * We need to keep this perf counter field separately from struct + * lttng_ctx_field because cpu hotplug needs fixed-location addresses. + */ +struct lttng_perf_counter_field { + struct notifier_block nb; + int hp_enable; + struct perf_event_attr *attr; + struct perf_event **e; /* per-cpu array */ +}; + struct lttng_ctx_field { - const char *name; - struct lttng_type type; - void *ctx_field_callback; + struct lttng_event_field event_field; + size_t (*get_size)(size_t offset); + void (*record)(struct lttng_ctx_field *field, + struct lib_ring_buffer_ctx *ctx, + struct ltt_channel *chan); union { - struct { - struct perf_event **e; /* per-cpu array */ - struct list_head *head; - } perf_counter; + struct lttng_perf_counter_field *perf_counter; } u; + void (*destroy)(struct lttng_ctx_field *field); }; struct lttng_ctx { - const struct lttng_ctx_field *fields; + struct lttng_ctx_field *fields; unsigned int nr_fields; unsigned int allocated_fields; }; @@ -137,14 +154,17 @@ struct lttng_event_desc { const struct lttng_event_ctx *ctx; /* context */ const struct lttng_event_field *fields; /* event payload */ unsigned int nr_fields; + struct module *owner; }; struct lttng_probe_desc { - const struct lttng_event_desc *event_desc; + const struct lttng_event_desc **event_desc; unsigned int nr_events; struct list_head head; /* chain registered probes */ }; +struct lttng_krp; /* Kretprobe handling */ + /* * ltt_event structure is referred to by the tracing fast path. It must be * kept small. @@ -152,20 +172,26 @@ struct lttng_probe_desc { struct ltt_event { unsigned int id; struct ltt_channel *chan; + int enabled; const struct lttng_event_desc *desc; void *filter; + struct lttng_ctx *ctx; enum lttng_kernel_instrumentation instrumentation; union { struct { struct kprobe kp; char *symbol_name; } kprobe; + struct { + struct lttng_krp *lttng_krp; + char *symbol_name; + } kretprobe; struct { char *symbol_name; } ftrace; } u; struct list_head list; /* Event list */ - int metadata_dumped:1; + unsigned int metadata_dumped:1; }; struct ltt_channel_ops { @@ -177,36 +203,60 @@ struct ltt_channel_ops { unsigned int read_timer_interval); void (*channel_destroy)(struct channel *chan); struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan); + int (*buffer_has_read_closed_stream)(struct channel *chan); void (*buffer_read_close)(struct lib_ring_buffer *buf); - int (*event_reserve)(struct lib_ring_buffer_ctx *ctx); + int (*event_reserve)(struct lib_ring_buffer_ctx *ctx, + uint32_t event_id); void (*event_commit)(struct lib_ring_buffer_ctx *ctx); void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src, size_t len); + void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx, + const void *src, size_t len); + void (*event_memset)(struct lib_ring_buffer_ctx *ctx, + int c, size_t len); /* * packet_avail_size returns the available size in the current * packet. Note that the size returned is only a hint, since it * may change due to concurrent writes. */ size_t (*packet_avail_size)(struct channel *chan); - wait_queue_head_t *(*get_reader_wait_queue)(struct ltt_channel *chan); + wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu); + wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan); + int (*is_finalized)(struct channel *chan); + int (*is_disabled)(struct channel *chan); +}; + +struct ltt_transport { + char *name; + struct module *owner; + struct list_head node; + struct ltt_channel_ops ops; }; struct ltt_channel { unsigned int id; struct channel *chan; /* Channel buffers */ + int enabled; + struct lttng_ctx *ctx; /* Event ID management */ struct ltt_session *session; struct file *file; /* File associated to channel */ unsigned int free_event_id; /* Next event ID to allocate */ struct list_head list; /* Channel list */ - wait_queue_head_t notify_wait; /* Channel addition notif. waitqueue */ struct ltt_channel_ops *ops; + struct ltt_transport *transport; + struct ltt_event **sc_table; /* for syscall tracing */ + struct ltt_event **compat_sc_table; + struct ltt_event *sc_unknown; /* for unknown syscalls */ + struct ltt_event *sc_compat_unknown; + struct ltt_event *sc_exit; /* for syscall exit */ int header_type; /* 0: unset, 1: compact, 2: large */ - int metadata_dumped:1; + unsigned int metadata_dumped:1; }; struct ltt_session { int active; /* Is trace session active ? */ + int been_active; /* Has trace session been active ? */ struct file *file; /* File associated to session */ struct ltt_channel *metadata; /* Metadata channel */ struct list_head chan; /* Channel list head */ @@ -214,19 +264,12 @@ struct ltt_session { struct list_head list; /* Session list */ unsigned int free_chan_id; /* Next chan ID to allocate */ uuid_le uuid; /* Trace session unique ID */ - int metadata_dumped:1; -}; - -struct ltt_transport { - char *name; - struct module *owner; - struct list_head node; - struct ltt_channel_ops ops; + unsigned int metadata_dumped:1; }; struct ltt_session *ltt_session_create(void); -int ltt_session_start(struct ltt_session *session); -int ltt_session_stop(struct ltt_session *session); +int ltt_session_enable(struct ltt_session *session); +int ltt_session_disable(struct ltt_session *session); void ltt_session_destroy(struct ltt_session *session); struct ltt_channel *ltt_channel_create(struct ltt_session *session, @@ -240,17 +283,21 @@ struct ltt_channel *ltt_global_channel_create(struct ltt_session *session, size_t subbuf_size, size_t num_subbuf, unsigned int switch_timer_interval, unsigned int read_timer_interval); -void _ltt_channel_destroy(struct ltt_channel *chan); struct ltt_event *ltt_event_create(struct ltt_channel *chan, - char *name, struct lttng_kernel_event *event_param, - void *filter); -int ltt_event_unregister(struct ltt_event *event); + void *filter, + const struct lttng_event_desc *internal_desc); + +int ltt_channel_enable(struct ltt_channel *channel); +int ltt_channel_disable(struct ltt_channel *channel); +int ltt_event_enable(struct ltt_event *event); +int ltt_event_disable(struct ltt_event *event); void ltt_transport_register(struct ltt_transport *transport); void ltt_transport_unregister(struct ltt_transport *transport); +void synchronize_trace(void); int ltt_debugfs_abi_init(void); void ltt_debugfs_abi_exit(void); @@ -261,6 +308,51 @@ void ltt_event_put(const struct lttng_event_desc *desc); int ltt_probes_init(void); void ltt_probes_exit(void); +#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS +int lttng_syscalls_register(struct ltt_channel *chan, void *filter); +int lttng_syscalls_unregister(struct ltt_channel *chan); +#else +static inline int lttng_syscalls_register(struct ltt_channel *chan, void *filter) +{ + return -ENOSYS; +} + +static inline int lttng_syscalls_unregister(struct ltt_channel *chan) +{ + return 0; +} +#endif + +struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx); +int lttng_find_context(struct lttng_ctx *ctx, const char *name); +void lttng_remove_context_field(struct lttng_ctx **ctx, + struct lttng_ctx_field *field); +void lttng_destroy_context(struct lttng_ctx *ctx); +int lttng_add_pid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_procname_to_ctx(struct lttng_ctx **ctx); +int lttng_add_prio_to_ctx(struct lttng_ctx **ctx); +int lttng_add_nice_to_ctx(struct lttng_ctx **ctx); +int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_tid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx); +#if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) +int lttng_add_perf_counter_to_ctx(uint32_t type, + uint64_t config, + const char *name, + struct lttng_ctx **ctx); +#else +static inline +int lttng_add_perf_counter_to_ctx(uint32_t type, + uint64_t config, + const char *name, + struct lttng_ctx **ctx) +{ + return -ENOSYS; +} +#endif + #ifdef CONFIG_KPROBES int lttng_kprobes_register(const char *name, const char *symbol_name, @@ -268,6 +360,7 @@ int lttng_kprobes_register(const char *name, uint64_t addr, struct ltt_event *event); void lttng_kprobes_unregister(struct ltt_event *event); +void lttng_kprobes_destroy_private(struct ltt_event *event); #else static inline int lttng_kprobes_register(const char *name, @@ -279,9 +372,47 @@ int lttng_kprobes_register(const char *name, return -ENOSYS; } +static inline void lttng_kprobes_unregister(struct ltt_event *event) { } + +static inline +void lttng_kprobes_destroy_private(struct ltt_event *event) +{ +} +#endif + +#ifdef CONFIG_KRETPROBES +int lttng_kretprobes_register(const char *name, + const char *symbol_name, + uint64_t offset, + uint64_t addr, + struct ltt_event *event_entry, + struct ltt_event *event_exit); +void lttng_kretprobes_unregister(struct ltt_event *event); +void lttng_kretprobes_destroy_private(struct ltt_event *event); +#else +static inline +int lttng_kretprobes_register(const char *name, + const char *symbol_name, + uint64_t offset, + uint64_t addr, + struct ltt_event *event_entry, + struct ltt_event *event_exit) +{ + return -ENOSYS; +} + +static inline +void lttng_kretprobes_unregister(struct ltt_event *event) +{ +} + +static inline +void lttng_kretprobes_destroy_private(struct ltt_event *event) +{ +} #endif #ifdef CONFIG_DYNAMIC_FTRACE @@ -289,6 +420,7 @@ int lttng_ftrace_register(const char *name, const char *symbol_name, struct ltt_event *event); void lttng_ftrace_unregister(struct ltt_event *event); +void lttng_ftrace_destroy_private(struct ltt_event *event); #else static inline int lttng_ftrace_register(const char *name, @@ -302,5 +434,19 @@ static inline void lttng_ftrace_unregister(struct ltt_event *event) { } + +static inline +void lttng_ftrace_destroy_private(struct ltt_event *event) +{ +} #endif + +int lttng_calibrate(struct lttng_kernel_calibrate *calibrate); + +extern const struct file_operations lttng_tracepoint_list_fops; + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) +#define TRACEPOINT_HAS_DATA_ARG +#endif + #endif /* _LTT_EVENTS_H */