X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=include%2Fust%2Flttng-tracepoint-event.h;fp=include%2Fust%2Flttng-tracepoint-event.h;h=0000000000000000000000000000000000000000;hb=4318ae1be57eb7983ab4857a7a8eeb4a030a8216;hp=46d8b93374304e451f893a8c76a318cf55713bbe;hpb=d4419b81b243bc3a6bdd4a09b3ca2216d044a1c7;p=ust.git diff --git a/include/ust/lttng-tracepoint-event.h b/include/ust/lttng-tracepoint-event.h deleted file mode 100644 index 46d8b93..0000000 --- a/include/ust/lttng-tracepoint-event.h +++ /dev/null @@ -1,528 +0,0 @@ -/* - * Copyright (C) 2009 Steven Rostedt - * Copyright (C) 2011 Mathieu Desnoyers - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; - * version 2.1 of the License. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include -#include -#include -#include -#include - -/* - * Macro declarations used for all stages. - */ - -#undef ctf_integer -#define ctf_integer(_type, _item, _src) \ - ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10) - -#undef ctf_integer_hex -#define ctf_integer_hex(_type, _item, _src) \ - ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 16) - -#undef ctf_integer_network -#define ctf_integer_network(_type, _item, _src) \ - ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 10) - -#undef ctf_integer_network_hex -#define ctf_integer_network_hex(_type, _item, _src) \ - ctf_integer_ext(_type, _item, _src, BIG_ENDIAN, 16) - -/* ctf_float is redefined at each step */ - -#undef ctf_array -#define ctf_array(_type, _item, _src, _length) \ - ctf_array_encoded(_type, _item, _src, _length, none) - -#undef ctf_array_text -#define ctf_array_text(_type, _item, _src, _length) \ - ctf_array_encoded(_type, _item, _src, _length, UTF8) - -#undef ctf_sequence -#define ctf_sequence(_type, _item, _src, _length_type, _src_length) \ - ctf_sequence_encoded(_type, _item, _src, \ - _length_type, _src_length, none) - -#undef ctf_sequence_text -#define ctf_sequence_text(_type, _item, _src, _length_type, _src_length) \ - ctf_sequence_encoded(_type, _item, _src, \ - _length_type, _src_length, UTF8) - -/* ctf_string is redefined at each step */ - -/* - * TRACEPOINT_EVENT_CLASS can be used to add a generic function handlers - * for events. That is, if all events have the same parameters and just - * have distinct trace points. Each tracepoint can be defined with - * TRACEPOINT_EVENT_INSTANCE and that will map the - * TRACEPOINT_EVENT_CLASS to the tracepoint. - * - * TRACEPOINT_EVENT is a one to one mapping between tracepoint and - * template. - */ - -#undef TRACEPOINT_EVENT -#define TRACEPOINT_EVENT(name, proto, args, fields) \ - TRACEPOINT_EVENT_CLASS(name, \ - TP_PARAMS(proto), \ - TP_PARAMS(args), \ - TP_PARAMS(fields)) \ - TRACEPOINT_EVENT_INSTANCE(name, name, TP_PARAMS(proto), TP_PARAMS(args)) - -#undef TRACEPOINT_EVENT_NOARGS -#define TRACEPOINT_EVENT_NOARGS(name, fields) \ - TRACEPOINT_EVENT_CLASS_NOARGS(name, \ - TP_PARAMS(fields)) \ - TRACEPOINT_EVENT_INSTANCE_NOARGS(name, name) - -/* Helpers */ -#define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) - -#define _tp_max_t(type, x, y) \ - ({ \ - type __max1 = (x); \ - type __max2 = (y); \ - __max1 > __max2 ? __max1: __max2; \ - }) - - -/* - * Stage 1 of the trace events. - * - * Create event field type metadata section. - * Each event produce an array of fields. - */ - -/* Reset all macros within TRACEPOINT_EVENT */ -#include - -/* Named field types must be defined in lttng-types.h */ - -#undef ctf_integer_ext -#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ - { \ - .name = #_item, \ - .type = __type_integer(_type, _byte_order, _base, none),\ - }, - -#undef ctf_float -#define ctf_float(_type, _item, _src) \ - { \ - .name = #_item, \ - .type = __type_float(_type), \ - }, - -#undef ctf_array_encoded -#define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ - { \ - .name = #_item, \ - .type = \ - { \ - .atype = atype_array, \ - .u.array = \ - { \ - .length = _length, \ - .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ - }, \ - }, \ - }, - -#undef ctf_sequence_encoded -#define ctf_sequence_encoded(_type, _item, _src, \ - _length_type, _src_length, _encoding) \ - { \ - .name = #_item, \ - .type = \ - { \ - .atype = atype_sequence, \ - .u.sequence = \ - { \ - .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \ - .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \ - }, \ - }, \ - }, - -#undef ctf_string -#define ctf_string(_item, _src) \ - { \ - .name = #_item, \ - .type = \ - { \ - .atype = atype_string, \ - .u.basic.string.encoding = lttng_encode_UTF8, \ - }, \ - }, - -#undef TP_FIELDS -#define TP_FIELDS(args...) args /* Only one used in this phase */ - -#undef TRACEPOINT_EVENT_CLASS_NOARGS -#define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ - static const struct lttng_event_field __event_fields___##_name[] = { \ - _fields \ - }; - -#undef TRACEPOINT_EVENT_CLASS -#define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ - TRACEPOINT_EVENT_CLASS_NOARGS(_name, TP_PARAMS(_fields)) - -#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) - -/* - * Stage 2 of the trace events. - * - * Create probe callback prototypes. - */ - -/* Reset all macros within TRACEPOINT_EVENT */ -#include - -#undef TP_PROTO -#define TP_PROTO(args...) args - -#undef TRACEPOINT_EVENT_CLASS -#define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ -static void __event_probe__##_name(void *__data, _proto); - -#undef TRACEPOINT_EVENT_CLASS_NOARGS -#define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ -static void __event_probe__##_name(void *__data); - -#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) - -/* - * Stage 3 of the trace events. - * - * Create an array of events. - */ - -/* Named field types must be defined in lttng-types.h */ - -/* Reset all macros within TRACEPOINT_EVENT */ -#include - -#undef TRACEPOINT_EVENT_INSTANCE_NOARGS -#define TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) \ - { \ - .fields = __event_fields___##_template, \ - .name = #_name, \ - .probe_callback = (void *) &__event_probe__##_template,\ - .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_template), \ - }, - -#undef TRACEPOINT_EVENT_INSTANCE -#define TRACEPOINT_EVENT_INSTANCE(_template, _name, _proto, _args) \ - TRACEPOINT_EVENT_INSTANCE_NOARGS(_template, _name) - -#define TP_ID1(_token, _system) _token##_system -#define TP_ID(_token, _system) TP_ID1(_token, _system) - -static const struct lttng_event_desc TP_ID(__event_desc___, TRACEPOINT_SYSTEM)[] = { -#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) -}; - -#undef TP_ID1 -#undef TP_ID - - -/* - * Stage 4 of the trace events. - * - * Create a toplevel descriptor for the whole probe. - */ - -#define TP_ID1(_token, _system) _token##_system -#define TP_ID(_token, _system) TP_ID1(_token, _system) - -/* non-const because list head will be modified when registered. */ -static struct lttng_probe_desc TP_ID(__probe_desc___, TRACEPOINT_SYSTEM) = { - .event_desc = TP_ID(__event_desc___, TRACEPOINT_SYSTEM), - .nr_events = _TP_ARRAY_SIZE(TP_ID(__event_desc___, TRACEPOINT_SYSTEM)), -}; - -#undef TP_ID1 -#undef TP_ID - -/* - * Stage 5 of the trace events. - * - * Create static inline function that calculates event size. - */ - -/* Reset all macros within TRACEPOINT_EVENT */ -#include - -/* Named field types must be defined in lttng-types.h */ - -#undef ctf_integer_ext -#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ - __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ - __event_len += sizeof(_type); - -#undef ctf_float -#define ctf_float(_type, _item, _src) \ - __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ - __event_len += sizeof(_type); - -#undef ctf_array_encoded -#define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ - __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ - __event_len += sizeof(_type) * (_length); - -#undef ctf_sequence_encoded -#define ctf_sequence_encoded(_type, _item, _src, _length_type, \ - _src_length, _encoding) \ - __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_length_type)); \ - __event_len += sizeof(_length_type); \ - __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ - __dynamic_len[__dynamic_len_idx] = (_src_length); \ - __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ - __dynamic_len_idx++; - -#undef ctf_string -#define ctf_string(_item, _src) \ - __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; - -#undef TP_PROTO -#define TP_PROTO(args...) args - -#undef TP_FIELDS -#define TP_FIELDS(args...) args - -#undef TRACEPOINT_EVENT_CLASS -#define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ -static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \ -{ \ - size_t __event_len = 0; \ - unsigned int __dynamic_len_idx = 0; \ - \ - if (0) \ - (void) __dynamic_len_idx; /* don't warn if unused */ \ - _fields \ - return __event_len; \ -} - -#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) - -/* - * Stage 6 of the trace events. - * - * Create static inline function that calculates event payload alignment. - */ - -/* Reset all macros within TRACEPOINT_EVENT */ -#include - -/* Named field types must be defined in lttng-types.h */ - -#undef ctf_integer_ext -#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ - __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); - -#undef ctf_float -#define ctf_float(_type, _item, _src) \ - __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); - -#undef ctf_array_encoded -#define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ - __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); - -#undef ctf_sequence_encoded -#define ctf_sequence_encoded(_type, _item, _src, _length_type, \ - _src_length, _encoding) \ - __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_length_type)); \ - __event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type)); - -#undef ctf_string -#define ctf_string(_item, _src) - -#undef TP_PROTO -#define TP_PROTO(args...) args - -#undef TP_FIELDS -#define TP_FIELDS(args...) args - -#undef TRACEPOINT_EVENT_CLASS -#define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ -static inline size_t __event_get_align__##_name(_proto) \ -{ \ - size_t __event_align = 1; \ - _fields \ - return __event_align; \ -} - -#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) - - -/* - * Stage 7 of the trace events. - * - * Create the probe function : call even size calculation and write event data - * into the buffer. - * - * We use both the field and assignment macros to write the fields in the order - * defined in the field declaration. The field declarations control the - * execution order, jumping to the appropriate assignment block. - */ - -/* Reset all macros within TRACEPOINT_EVENT */ -#include - -#undef ctf_integer_ext -#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \ - { \ - _type __tmp = (_src); \ - lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ - __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ - } - -#undef ctf_float -#define ctf_float(_type, _item, _src) \ - { \ - _type __tmp = (_src); \ - lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp));\ - __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ - } - -#undef ctf_array_encoded -#define ctf_array_encoded(_type, _item, _src, _length, _encoding) \ - lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ - __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); - -#undef ctf_sequence_encoded -#define ctf_sequence_encoded(_type, _item, _src, _length_type, \ - _src_length, _encoding) \ - { \ - _length_type __tmpl = __dynamic_len[__dynamic_len_idx]; \ - lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\ - __chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type));\ - } \ - lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ - __chan->ops->event_write(&__ctx, _src, \ - sizeof(_type) * __get_dynamic_len(dest)); - -#undef ctf_string -#define ctf_string(_item, _src) \ - lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ - __chan->ops->event_write(&__ctx, _src, __get_dynamic_len(dest)); - -/* Beware: this get len actually consumes the len value */ -#undef __get_dynamic_len -#define __get_dynamic_len(field) __dynamic_len[__dynamic_len_idx++] - -#undef TP_PROTO -#define TP_PROTO(args...) args - -#undef TP_ARGS -#define TP_ARGS(args...) args - -#undef TP_FIELDS -#define TP_FIELDS(args...) args - -#undef TRACEPOINT_EVENT_CLASS -#define TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ -static void __event_probe__##_name(void *__data, _proto) \ -{ \ - struct ltt_event *__event = __data; \ - struct ltt_channel *__chan = __event->chan; \ - struct lttng_ust_lib_ring_buffer_ctx __ctx; \ - size_t __event_len, __event_align; \ - size_t __dynamic_len_idx = 0; \ - size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_name)]; \ - int __ret; \ - \ - if (0) \ - (void) __dynamic_len_idx; /* don't warn if unused */ \ - if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ - return; \ - if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ - return; \ - if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ - return; \ - __event_len = __event_get_size__##_name(__dynamic_len, _args); \ - __event_align = __event_get_align__##_name(_args); \ - lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ - __event_align, -1, __chan->handle); \ - __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ - if (__ret < 0) \ - return; \ - _fields \ - __chan->ops->event_commit(&__ctx); \ -} - -#undef TRACEPOINT_EVENT_CLASS_NOARGS -#define TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ -static void __event_probe__##_name(void *__data) \ -{ \ - struct ltt_event *__event = __data; \ - struct ltt_channel *__chan = __event->chan; \ - struct lttng_ust_lib_ring_buffer_ctx __ctx; \ - size_t __event_len, __event_align; \ - int __ret; \ - \ - if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->session->active))) \ - return; \ - if (caa_unlikely(!CMM_ACCESS_ONCE(__chan->enabled))) \ - return; \ - if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \ - return; \ - __event_len = 0; \ - __event_align = 1; \ - lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ - __event_align, -1, __chan->handle); \ - __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ - if (__ret < 0) \ - return; \ - _fields \ - __chan->ops->event_commit(&__ctx); \ -} - -#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE) - -#undef __get_dynamic_len - -/* - * Stage 8 of the trace events. - * - * Register/unregister probes at module load/unload. - */ - -/* Reset all macros within TRACEPOINT_EVENT */ -#include - -#define TP_ID1(_token, _system) _token##_system -#define TP_ID(_token, _system) TP_ID1(_token, _system) - -static void __attribute__((constructor)) -TP_ID(__lttng_events_init__, TRACEPOINT_SYSTEM)(void) -{ - int ret; - - ret = ltt_probe_register(&TP_ID(__probe_desc___, TRACEPOINT_SYSTEM)); - assert(!ret); -} - -static void __attribute__((destructor)) -TP_ID(__lttng_events_exit__, TRACEPOINT_SYSTEM)(void) -{ - ltt_probe_unregister(&TP_ID(__probe_desc___, TRACEPOINT_SYSTEM)); -} - -#undef TP_ID1 -#undef TP_ID