+++ /dev/null
-/*
- * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com>
- * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * 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 <stdio.h>
-#include <urcu/compiler.h>
-#include <ust/lttng-events.h>
-#include <ust/usterr-signal-safe.h>
-#include <ust/ringbuffer-config.h>
-
-/*
- * 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 <ust/lttng-tracepoint-event-reset.h>
-
-/* 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 <ust/lttng-tracepoint-event-reset.h>
-
-#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 <ust/lttng-tracepoint-event-reset.h>
-
-#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 <ust/lttng-tracepoint-event-reset.h>
-
-/* 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 <ust/lttng-tracepoint-event-reset.h>
-
-/* 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 <ust/lttng-tracepoint-event-reset.h>
-
-#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 <ust/lttng-tracepoint-event-reset.h>
-
-#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
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