X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=ltt-events.h;h=955611e969e466e3414f2d7c90149f9833e2a17a;hb=e8951e63e00a0b56d8ce1b0c821e5ebfb1e35d63;hp=a5eab5b8b7ca1fecf5ed681282be8a1b08aee123;hpb=1ec3f75aca46d4196d4d7dbbbe0b791f663203f1;p=lttng-modules.git diff --git a/ltt-events.h b/ltt-events.h index a5eab5b8..955611e9 100644 --- a/ltt-events.h +++ b/ltt-events.h @@ -7,15 +7,23 @@ * Copyright 2010 (c) - Mathieu Desnoyers * * Holds LTTng per-session event registry. + * + * Dual LGPL v2.1/GPL v2 license. */ #include -#include -#include "ltt-debugfs-abi.h" +#include +#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 */ @@ -31,8 +39,9 @@ enum abstract_types { /* Update the string_encodings name table in lttng-types.c along with this enum */ enum lttng_string_encodings { - lttng_encode_UTF8 = 0, - lttng_encode_ASCII = 1, + lttng_encode_none = 0, + lttng_encode_UTF8 = 1, + lttng_encode_ASCII = 2, NR_STRING_ENCODINGS, }; @@ -41,23 +50,27 @@ struct lttng_enum_entry { const char *string; }; -#define __type_integer(_type, _byte_order) \ +#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_##_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; }; union _lttng_basic_type { @@ -103,22 +116,55 @@ struct lttng_enum { struct lttng_event_field { const char *name; - const struct lttng_type type; + 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 { + 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 lttng_perf_counter_field *perf_counter; + } u; + void (*destroy)(struct lttng_ctx_field *field); +}; + +struct lttng_ctx { + struct lttng_ctx_field *fields; + unsigned int nr_fields; + unsigned int allocated_fields; }; struct lttng_event_desc { - const struct lttng_event_field *fields; const char *name; void *probe_callback; + 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. @@ -126,52 +172,91 @@ struct lttng_probe_desc { struct ltt_event { unsigned int id; struct ltt_channel *chan; + int enabled; const struct lttng_event_desc *desc; void *filter; - enum instrum_type itype; + 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 { struct channel *(*channel_create)(const char *name, - struct ltt_session *session, + struct ltt_channel *ltt_chan, void *buf_addr, size_t subbuf_size, size_t num_subbuf, unsigned int switch_timer_interval, 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; - int metadata_dumped:1; - int header_type:2; /* 0: unset, 1: compact, 2: large */ + 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 */ + 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 */ @@ -179,19 +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, @@ -205,19 +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, - enum instrum_type itype, - const struct lttng_event_desc *event_desc, - void *filter); -int _ltt_event_unregister(struct ltt_event *event); -void _ltt_event_destroy(struct ltt_event *event); + struct lttng_kernel_event *event_param, + 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); @@ -228,4 +308,145 @@ 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, + uint64_t offset, + 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, + const char *symbol_name, + uint64_t offset, + uint64_t addr, + struct ltt_event *event) +{ + 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 +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, + const char *symbol_name, + struct ltt_event *event) +{ + return -ENOSYS; +} + +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 */