/*
- * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com>
- * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * SPDX-License-Identifier: MIT
*
- * 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
+ * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
+#include <stdint.h>
#include <stdio.h>
+#include <stdlib.h>
#include <urcu/compiler.h>
+#include <urcu/rculist.h>
#include <lttng/ust-events.h>
-#include <lttng/usterr-signal-safe.h>
#include <lttng/ringbuffer-config.h>
+#include <lttng/ust-compiler.h>
+#include <lttng/tracepoint.h>
+#include <lttng/ust-endian.h>
+#include <string.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)
+#define __LTTNG_UST_NULL_STRING "(null)"
-/* 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 */
+#undef tp_list_for_each_entry_rcu
+#define tp_list_for_each_entry_rcu(pos, head, member) \
+ for (pos = cds_list_entry(tp_rcu_dereference((head)->next), __typeof__(*pos), member); \
+ &pos->member != (head); \
+ pos = cds_list_entry(tp_rcu_dereference(pos->member.next), __typeof__(*pos), member))
/*
- * 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_CLASS declares a class of tracepoints receiving the
+ * same arguments and having the same field layout.
+ *
+ * TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with
+ * its own provider and name. It refers to a class (template).
*
- * TRACEPOINT_EVENT is a one to one mapping between tracepoint and
- * template.
+ * TRACEPOINT_EVENT declared both a class and an instance and does a
+ * direct mapping from the instance to the class.
*/
#undef TRACEPOINT_EVENT
-#define TRACEPOINT_EVENT(provider, name, args, fields) \
- TRACEPOINT_EVENT_CLASS(provider, name, \
- TP_PARAMS(args), \
- TP_PARAMS(fields)) \
- TRACEPOINT_EVENT_INSTANCE(provider, name, name, TP_PARAMS(args))
+#define TRACEPOINT_EVENT(_provider, _name, _args, _fields) \
+ _TRACEPOINT_EVENT_CLASS(_provider, _name, \
+ _TP_PARAMS(_args), \
+ _TP_PARAMS(_fields)) \
+ _TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name, \
+ _TP_PARAMS(_args))
+
+#undef TRACEPOINT_EVENT_CLASS
+#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+ _TRACEPOINT_EVENT_CLASS(_provider, _name, _TP_PARAMS(_args), _TP_PARAMS(_fields))
+
+#undef TRACEPOINT_EVENT_INSTANCE
+#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
+ _TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _TP_PARAMS(_args))
/* Helpers */
#define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
})
/*
- * Stage 0 of the trace events.
+ * Stage 0 of tracepoint event generation.
*
* Check that each TRACEPOINT_EVENT provider argument match the
* TRACEPOINT_PROVIDER by creating dummy callbacks.
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
-#define TP_ID1(_token, _provider) _token##_provider
-#define TP_ID(_token, _provider) TP_ID1(_token, _provider)
-
+static inline lttng_ust_notrace
+void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void);
static inline
-void TP_ID(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void)
+void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void)
{
}
-#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
__tracepoint_provider_mismatch_##_provider();
-#undef TRACEPOINT_EVENT_INSTANCE
-#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
+#undef _TRACEPOINT_EVENT_INSTANCE
+#define _TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
__tracepoint_provider_mismatch_##_provider();
-static __attribute__((unused))
-void TP_ID(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void)
+static inline lttng_ust_notrace
+void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void);
+static inline
+void _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)(void)
{
-#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE)
+#include TRACEPOINT_INCLUDE
}
-#undef TP_ID1
-#undef TP_ID
+/*
+ * Stage 0.1 of tracepoint event generation.
+ *
+ * Check that each TRACEPOINT_EVENT provider:name does not exceed the
+ * tracepoint name length limit.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+#undef _TRACEPOINT_EVENT_INSTANCE
+#define _TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
+static const char \
+ __tp_name_len_check##_provider##___##_name[LTTNG_UST_SYM_NAME_LEN] \
+ __attribute__((unused)) = \
+ #_provider ":" #_name;
+
+#include TRACEPOINT_INCLUDE
+
+/*
+ * Stage 0.2 of tracepoint event generation.
+ *
+ * Create dummy trace prototypes for each event class, and for each used
+ * template. This will allow checking whether the prototypes from the
+ * class and the instance using the class actually match.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+#undef TP_ARGS
+#define TP_ARGS(...) __VA_ARGS__
+
+#undef _TRACEPOINT_EVENT_INSTANCE
+#define _TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
+void __event_template_proto___##_provider##___##_template(_TP_ARGS_DATA_PROTO(_args));
+
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+void __event_template_proto___##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args));
+
+#include TRACEPOINT_INCLUDE
+
+/*
+ * Stage 0.9 of tracepoint event generation
+ *
+ * Unfolding the enums
+ */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+/* Enumeration entry (single value) */
+#undef ctf_enum_value
+#define ctf_enum_value(_string, _value) \
+ { \
+ .start = { \
+ .value = lttng_is_signed_type(__typeof__(_value)) ? \
+ (long long) (_value) : (_value), \
+ .signedness = lttng_is_signed_type(__typeof__(_value)), \
+ }, \
+ .end = { \
+ .value = lttng_is_signed_type(__typeof__(_value)) ? \
+ (long long) (_value) : (_value), \
+ .signedness = lttng_is_signed_type(__typeof__(_value)), \
+ }, \
+ .string = (_string), \
+ },
+
+/* Enumeration entry (range) */
+#undef ctf_enum_range
+#define ctf_enum_range(_string, _range_start, _range_end) \
+ { \
+ .start = { \
+ .value = lttng_is_signed_type(__typeof__(_range_start)) ? \
+ (long long) (_range_start) : (_range_start), \
+ .signedness = lttng_is_signed_type(__typeof__(_range_start)), \
+ }, \
+ .end = { \
+ .value = lttng_is_signed_type(__typeof__(_range_end)) ? \
+ (long long) (_range_end) : (_range_end), \
+ .signedness = lttng_is_signed_type(__typeof__(_range_end)), \
+ }, \
+ .string = (_string), \
+ },
+
+/* Enumeration entry (automatic value; follows the rules of CTF) */
+#undef ctf_enum_auto
+#define ctf_enum_auto(_string) \
+ { \
+ .start = { \
+ .value = -1ULL, \
+ .signedness = 0, \
+ }, \
+ .end = { \
+ .value = -1ULL, \
+ .signedness = 0, \
+ }, \
+ .string = (_string), \
+ .u = { \
+ .extra = { \
+ .options = LTTNG_ENUM_ENTRY_OPTION_IS_AUTO, \
+ }, \
+ }, \
+ },
+
+#undef TP_ENUM_VALUES
+#define TP_ENUM_VALUES(...) \
+ __VA_ARGS__
+
+#undef TRACEPOINT_ENUM
+#define TRACEPOINT_ENUM(_provider, _name, _values) \
+ const struct lttng_enum_entry __enum_values__##_provider##_##_name[] = { \
+ _values \
+ ctf_enum_value("", 0) /* Dummy, 0-len array forbidden by C99. */ \
+ };
+#include TRACEPOINT_INCLUDE
+
+/*
+ * Stage 0.9.1
+ * Verifying array and sequence elements are of an integer type.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+#include <lttng/ust-tracepoint-event-write.h>
+#include <lttng/ust-tracepoint-event-nowrite.h>
+
+#undef _ctf_array_encoded
+#define _ctf_array_encoded(_type, _item, _src, _byte_order, \
+ _length, _encoding, _nowrite, \
+ _elem_type_base) \
+ _lttng_array_element_type_is_supported(_type, _item)
+
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _byte_order, \
+ _length_type, _src_length, _encoding, _nowrite, \
+ _elem_type_base) \
+ _lttng_array_element_type_is_supported(_type, _item)
+
+#undef TP_FIELDS
+#define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
+
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+ _fields
+
+#include TRACEPOINT_INCLUDE
/*
- * Stage 1 of the trace events.
+ * Stage 1 of tracepoint event generation.
*
* Create event field type metadata section.
* Each event produce an array of fields.
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
+#include <lttng/ust-tracepoint-event-write.h>
+#include <lttng/ust-tracepoint-event-nowrite.h>
-#undef ctf_integer_ext
-#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \
+#undef _ctf_integer_ext
+#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
{ \
.name = #_item, \
.type = __type_integer(_type, _byte_order, _base, none),\
+ .nowrite = _nowrite, \
+ .u = { \
+ .ext = { \
+ .nofilter = 0, \
+ }, \
+ }, \
},
-#undef ctf_float
-#define ctf_float(_type, _item, _src) \
+#undef _ctf_float
+#define _ctf_float(_type, _item, _src, _nowrite) \
{ \
.name = #_item, \
.type = __type_float(_type), \
+ .nowrite = _nowrite, \
+ .u = { \
+ .ext = { \
+ .nofilter = 0, \
+ }, \
+ }, \
},
-#undef ctf_array_encoded
-#define ctf_array_encoded(_type, _item, _src, _length, _encoding) \
+#undef _ctf_array_encoded
+#define _ctf_array_encoded(_type, _item, _src, _byte_order, \
+ _length, _encoding, _nowrite, \
+ _elem_type_base) \
{ \
.name = #_item, \
.type = \
{ \
- .atype = atype_array, \
- .u.array = \
+ .atype = atype_array_nestable, \
+ .u = \
{ \
- .length = _length, \
- .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
- }, \
+ .array_nestable = \
+ { \
+ .elem_type = __LTTNG_COMPOUND_LITERAL(struct lttng_type, \
+ __type_integer(_type, _byte_order, _elem_type_base, _encoding)), \
+ .length = _length, \
+ .alignment = 0, \
+ } \
+ } \
}, \
+ .nowrite = _nowrite, \
+ .u = { \
+ .ext = { \
+ .nofilter = 0, \
+ }, \
+ }, \
},
-#undef ctf_sequence_encoded
-#define ctf_sequence_encoded(_type, _item, _src, \
- _length_type, _src_length, _encoding) \
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _byte_order, \
+ _length_type, _src_length, _encoding, _nowrite, \
+ _elem_type_base) \
+ { \
+ .name = "_" #_item "_length", \
+ .type = __type_integer(_length_type, BYTE_ORDER, 10, none), \
+ .nowrite = _nowrite, \
+ .u = { \
+ .ext = { \
+ .nofilter = 1, \
+ }, \
+ }, \
+ }, \
{ \
.name = #_item, \
.type = \
{ \
- .atype = atype_sequence, \
- .u.sequence = \
+ .atype = atype_sequence_nestable, \
+ .u = \
{ \
- .length_type = __type_integer(_length_type, BYTE_ORDER, 10, none), \
- .elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
+ .sequence_nestable = \
+ { \
+ .length_name = "_" #_item "_length", \
+ .elem_type = __LTTNG_COMPOUND_LITERAL(struct lttng_type, \
+ __type_integer(_type, _byte_order, _elem_type_base, _encoding)), \
+ .alignment = 0, \
+ }, \
}, \
}, \
+ .nowrite = _nowrite, \
+ .u = { \
+ .ext = { \
+ .nofilter = 0, \
+ }, \
+ }, \
},
-#undef ctf_string
-#define ctf_string(_item, _src) \
+#undef _ctf_string
+#define _ctf_string(_item, _src, _nowrite) \
{ \
.name = #_item, \
.type = \
{ \
.atype = atype_string, \
- .u.basic.string.encoding = lttng_encode_UTF8, \
+ .u = \
+ { \
+ .string = { .encoding = lttng_encode_UTF8 } \
+ }, \
+ }, \
+ .nowrite = _nowrite, \
+ .u = { \
+ .ext = { \
+ .nofilter = 0, \
+ }, \
+ }, \
+ },
+
+#undef _ctf_enum
+#define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \
+ { \
+ .name = #_item, \
+ .type = { \
+ .atype = atype_enum_nestable, \
+ .u = { \
+ .enum_nestable = { \
+ .desc = &__enum_##_provider##_##_name, \
+ .container_type = __LTTNG_COMPOUND_LITERAL(struct lttng_type, \
+ __type_integer(_type, BYTE_ORDER, 10, none)), \
+ }, \
+ }, \
+ }, \
+ .nowrite = _nowrite, \
+ .u = { \
+ .ext = { \
+ .nofilter = 0, \
+ }, \
}, \
},
#undef TP_FIELDS
-#define TP_FIELDS(args...) args /* Only one used in this phase */
+#define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
-#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
static const struct lttng_event_field __event_fields___##_provider##___##_name[] = { \
_fields \
+ ctf_integer(int, dummy, 0) /* Dummy, C99 forbids 0-len array. */ \
+ };
+
+#undef TRACEPOINT_ENUM
+#define TRACEPOINT_ENUM(_provider, _name, _values) \
+ static const struct lttng_enum_desc __enum_##_provider##_##_name = { \
+ .name = #_provider "_" #_name, \
+ .entries = __enum_values__##_provider##_##_name, \
+ .nr_entries = _TP_ARRAY_SIZE(__enum_values__##_provider##_##_name) - 1, \
};
-#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE)
+#include TRACEPOINT_INCLUDE
/*
- * Stage 2 of the trace events.
+ * Stage 2 of tracepoint event generation.
*
* Create probe callback prototypes.
*/
#include <lttng/ust-tracepoint-event-reset.h>
#undef TP_ARGS
-#define TP_ARGS(args...) args
+#define TP_ARGS(...) __VA_ARGS__
-#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
-static void __event_probe__##_provider##___##_name(_TP_ARGS_PROTO_DATA(_args));
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args));
-#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE)
+#include TRACEPOINT_INCLUDE
/*
- * Stage 3 of the trace events.
+ * Stage 2.1 of tracepoint event generation.
*
- * Create an array of events.
+ * Create probe event notifier callback prototypes.
*/
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
-#undef TRACEPOINT_EVENT_INSTANCE
-#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
- { \
- .fields = __event_fields___##_provider##___##_template,\
- .name = #_provider ":" #_name, \
- .probe_callback = (void *) &__event_probe__##_provider##___##_template,\
- .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \
- },
-
-#define TP_ID1(_token, _provider) _token##_provider
-#define TP_ID(_token, _provider) TP_ID1(_token, _provider)
-
-static const struct lttng_event_desc TP_ID(__event_desc___, TRACEPOINT_PROVIDER)[] = {
-#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE)
-};
-
-#undef TP_ID1
-#undef TP_ID
-
+#undef TP_ARGS
+#define TP_ARGS(...) __VA_ARGS__
-/*
- * Stage 4 of the trace events.
- *
- * Create a toplevel descriptor for the whole probe.
- */
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static void __event_notifier_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args));
-#define TP_ID1(_token, _provider) _token##_provider
-#define TP_ID(_token, _provider) TP_ID1(_token, _provider)
-
-/* non-const because list head will be modified when registered. */
-static struct lttng_probe_desc TP_ID(__probe_desc___, TRACEPOINT_PROVIDER) = {
- .event_desc = TP_ID(__event_desc___, TRACEPOINT_PROVIDER),
- .nr_events = _TP_ARRAY_SIZE(TP_ID(__event_desc___, TRACEPOINT_PROVIDER)),
-};
-
-#undef TP_ID1
-#undef TP_ID
+#include TRACEPOINT_INCLUDE
/*
- * Stage 5 of the trace events.
+ * Stage 3.0 of tracepoint event generation.
*
* Create static inline function that calculates event size.
*/
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
+#include <lttng/ust-tracepoint-event-write.h>
-#undef ctf_integer_ext
-#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \
+#undef _ctf_integer_ext
+#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
__event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \
__event_len += sizeof(_type);
-#undef ctf_float
-#define ctf_float(_type, _item, _src) \
+#undef _ctf_float
+#define _ctf_float(_type, _item, _src, _nowrite) \
__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) \
+#undef _ctf_array_encoded
+#define _ctf_array_encoded(_type, _item, _src, _byte_order, _length, _encoding, \
+ _nowrite, _elem_type_base) \
__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) \
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
+ _src_length, _encoding, _nowrite, _elem_type_base) \
__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)); \
__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 _ctf_string
+#define _ctf_string(_item, _src, _nowrite) \
+ __event_len += __dynamic_len[__dynamic_len_idx++] = \
+ strlen((_src) ? (_src) : __LTTNG_UST_NULL_STRING) + 1;
+
+#undef _ctf_enum
+#define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \
+ _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite)
#undef TP_ARGS
-#define TP_ARGS(args...) args
+#define TP_ARGS(...) __VA_ARGS__
#undef TP_FIELDS
-#define TP_FIELDS(args...) args
+#define TP_FIELDS(...) __VA_ARGS__
-#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
-static inline size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_PROTO_DATA(_args)) \
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static inline lttng_ust_notrace \
+size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)); \
+static inline \
+size_t __event_get_size__##_provider##___##_name(size_t *__dynamic_len, _TP_ARGS_DATA_PROTO(_args)) \
{ \
size_t __event_len = 0; \
unsigned int __dynamic_len_idx = 0; \
return __event_len; \
}
-#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE)
+#include TRACEPOINT_INCLUDE
+
+/*
+ * Stage 3.1 of tracepoint event generation.
+ *
+ * Create static inline function that layout the filter stack data.
+ * We make both write and nowrite data available to the filter.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+#include <lttng/ust-tracepoint-event-write.h>
+#include <lttng/ust-tracepoint-event-nowrite.h>
+
+#undef _ctf_integer_ext
+#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
+ if (lttng_is_signed_type(_type)) { \
+ int64_t __ctf_tmp_int64; \
+ switch (sizeof(_type)) { \
+ case 1: \
+ { \
+ union { _type t; int8_t v; } __tmp = { (_type) (_src) }; \
+ __ctf_tmp_int64 = (int64_t) __tmp.v; \
+ break; \
+ } \
+ case 2: \
+ { \
+ union { _type t; int16_t v; } __tmp = { (_type) (_src) }; \
+ if (_byte_order != BYTE_ORDER) \
+ __tmp.v = bswap_16(__tmp.v); \
+ __ctf_tmp_int64 = (int64_t) __tmp.v; \
+ break; \
+ } \
+ case 4: \
+ { \
+ union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \
+ if (_byte_order != BYTE_ORDER) \
+ __tmp.v = bswap_32(__tmp.v); \
+ __ctf_tmp_int64 = (int64_t) __tmp.v; \
+ break; \
+ } \
+ case 8: \
+ { \
+ union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \
+ if (_byte_order != BYTE_ORDER) \
+ __tmp.v = bswap_64(__tmp.v); \
+ __ctf_tmp_int64 = (int64_t) __tmp.v; \
+ break; \
+ } \
+ default: \
+ abort(); \
+ }; \
+ memcpy(__stack_data, &__ctf_tmp_int64, sizeof(int64_t)); \
+ } else { \
+ uint64_t __ctf_tmp_uint64; \
+ switch (sizeof(_type)) { \
+ case 1: \
+ { \
+ union { _type t; uint8_t v; } __tmp = { (_type) (_src) }; \
+ __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
+ break; \
+ } \
+ case 2: \
+ { \
+ union { _type t; uint16_t v; } __tmp = { (_type) (_src) }; \
+ if (_byte_order != BYTE_ORDER) \
+ __tmp.v = bswap_16(__tmp.v); \
+ __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
+ break; \
+ } \
+ case 4: \
+ { \
+ union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \
+ if (_byte_order != BYTE_ORDER) \
+ __tmp.v = bswap_32(__tmp.v); \
+ __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
+ break; \
+ } \
+ case 8: \
+ { \
+ union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \
+ if (_byte_order != BYTE_ORDER) \
+ __tmp.v = bswap_64(__tmp.v); \
+ __ctf_tmp_uint64 = (uint64_t) __tmp.v; \
+ break; \
+ } \
+ default: \
+ abort(); \
+ }; \
+ memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \
+ } \
+ __stack_data += sizeof(int64_t);
+
+#undef _ctf_float
+#define _ctf_float(_type, _item, _src, _nowrite) \
+ { \
+ double __ctf_tmp_double = (double) (_type) (_src); \
+ memcpy(__stack_data, &__ctf_tmp_double, sizeof(double)); \
+ __stack_data += sizeof(double); \
+ }
+
+#undef _ctf_array_encoded
+#define _ctf_array_encoded(_type, _item, _src, _byte_order, _length, \
+ _encoding, _nowrite, _elem_type_base) \
+ { \
+ unsigned long __ctf_tmp_ulong = (unsigned long) (_length); \
+ const void *__ctf_tmp_ptr = (_src); \
+ memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
+ __stack_data += sizeof(unsigned long); \
+ memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
+ __stack_data += sizeof(void *); \
+ }
+
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
+ _src_length, _encoding, _nowrite, _elem_type_base) \
+ { \
+ unsigned long __ctf_tmp_ulong = (unsigned long) (_src_length); \
+ const void *__ctf_tmp_ptr = (_src); \
+ memcpy(__stack_data, &__ctf_tmp_ulong, sizeof(unsigned long)); \
+ __stack_data += sizeof(unsigned long); \
+ memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
+ __stack_data += sizeof(void *); \
+ }
+
+#undef _ctf_string
+#define _ctf_string(_item, _src, _nowrite) \
+ { \
+ const void *__ctf_tmp_ptr = \
+ ((_src) ? (_src) : __LTTNG_UST_NULL_STRING); \
+ memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \
+ __stack_data += sizeof(void *); \
+ }
+
+#undef _ctf_enum
+#define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \
+ _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite)
+
+#undef TP_ARGS
+#define TP_ARGS(...) __VA_ARGS__
+
+#undef TP_FIELDS
+#define TP_FIELDS(...) __VA_ARGS__
+
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static inline \
+void __event_prepare_interpreter_stack__##_provider##___##_name(char *__stack_data,\
+ _TP_ARGS_DATA_PROTO(_args)) \
+{ \
+ _fields \
+}
+
+#include TRACEPOINT_INCLUDE
/*
- * Stage 6 of the trace events.
+ * Stage 4 of tracepoint event generation.
*
* Create static inline function that calculates event payload alignment.
*/
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
+#include <lttng/ust-tracepoint-event-write.h>
-#undef ctf_integer_ext
-#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \
+#undef _ctf_integer_ext
+#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
-#undef ctf_float
-#define ctf_float(_type, _item, _src) \
+#undef _ctf_float
+#define _ctf_float(_type, _item, _src, _nowrite) \
__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) \
+#undef _ctf_array_encoded
+#define _ctf_array_encoded(_type, _item, _src, _byte_order, _length, \
+ _encoding, _nowrite, _elem_type_base) \
__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) \
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
+ _src_length, _encoding, _nowrite, _elem_type_base) \
__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 _ctf_string
+#define _ctf_string(_item, _src, _nowrite)
+
+#undef _ctf_enum
+#define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \
+ _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite)
#undef TP_ARGS
-#define TP_ARGS(args...) args
+#define TP_ARGS(...) __VA_ARGS__
#undef TP_FIELDS
-#define TP_FIELDS(args...) args
+#define TP_FIELDS(...) __VA_ARGS__
-#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static inline lttng_ust_notrace \
+size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)); \
static inline \
size_t __event_get_align__##_provider##___##_name(_TP_ARGS_PROTO(_args)) \
{ \
return __event_align; \
}
-#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE)
+#include TRACEPOINT_INCLUDE
/*
- * Stage 7 of the trace events.
+ * Stage 5 of tracepoint event generation.
*
- * 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.
+ * Create the probe function. This function calls event size calculation
+ * and writes event data into the buffer.
*/
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
+#include <lttng/ust-tracepoint-event-write.h>
-#undef ctf_integer_ext
-#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \
+#undef _ctf_integer_ext
+#define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
{ \
_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) \
+#undef _ctf_float
+#define _ctf_float(_type, _item, _src, _nowrite) \
{ \
_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) \
+#undef _ctf_array_encoded
+#define _ctf_array_encoded(_type, _item, _src, _byte_order, _length, \
+ _encoding, _nowrite, _elem_type_base) \
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) \
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
+ _src_length, _encoding, _nowrite, _elem_type_base) \
{ \
- _length_type __tmpl = __dynamic_len[__dynamic_len_idx]; \
+ _length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \
lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_length_type));\
__chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_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));
+#undef _ctf_string
+#define _ctf_string(_item, _src, _nowrite) \
+ { \
+ const char *__ctf_tmp_string = \
+ ((_src) ? (_src) : __LTTNG_UST_NULL_STRING); \
+ lib_ring_buffer_align_ctx(&__ctx, \
+ lttng_alignof(*__ctf_tmp_string)); \
+ __chan->ops->event_strcpy(&__ctx, __ctf_tmp_string, \
+ __get_dynamic_len(dest)); \
+ }
+
+
+#undef _ctf_enum
+#define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \
+ _ctf_integer_ext(_type, _item, _src, BYTE_ORDER, 10, _nowrite)
/* Beware: this get len actually consumes the len value */
#undef __get_dynamic_len
-#define __get_dynamic_len(field) __dynamic_len[__dynamic_len_idx++]
+#define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++]
#undef TP_ARGS
-#define TP_ARGS(args...) args
+#define TP_ARGS(...) __VA_ARGS__
#undef TP_FIELDS
-#define TP_FIELDS(args...) args
+#define TP_FIELDS(...) __VA_ARGS__
-#undef TRACEPOINT_EVENT_CLASS
-#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
-static void __event_probe__##_provider##___##_name(_TP_ARGS_PROTO_DATA(_args))\
+/*
+ * For state dump, check that "session" argument (mandatory) matches the
+ * session this event belongs to. Ensures that we write state dump data only
+ * into the started session, not into all sessions.
+ */
+#undef _TP_SESSION_CHECK
+#ifdef TP_SESSION_CHECK
+#define _TP_SESSION_CHECK(session, csession) (session == csession)
+#else /* TP_SESSION_CHECK */
+#define _TP_SESSION_CHECK(session, csession) 1
+#endif /* TP_SESSION_CHECK */
+
+/*
+ * Use of __builtin_return_address(0) sometimes seems to cause stack
+ * corruption on 32-bit PowerPC. Disable this feature on that
+ * architecture for now by always using the NULL value for the ip
+ * context.
+ */
+#undef _TP_IP_PARAM
+#ifdef TP_IP_PARAM
+#define _TP_IP_PARAM(x) (x)
+#else /* TP_IP_PARAM */
+
+#if defined(__PPC__) && !defined(__PPC64__)
+#define _TP_IP_PARAM(x) NULL
+#else /* #if defined(__PPC__) && !defined(__PPC64__) */
+#define _TP_IP_PARAM(x) __builtin_return_address(0)
+#endif /* #else #if defined(__PPC__) && !defined(__PPC64__) */
+
+#endif /* TP_IP_PARAM */
+
+/*
+ * Using twice size for filter stack data to hold size and pointer for
+ * each field (worse case). For integers, max size required is 64-bit.
+ * Same for double-precision floats. Those fit within
+ * 2*sizeof(unsigned long) for all supported architectures.
+ * Perform UNION (||) of filter runtime list.
+ */
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static lttng_ust_notrace \
+void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); \
+static \
+void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)) \
{ \
- struct ltt_event *__event = __tp_cb_data; \
- struct ltt_channel *__chan = __event->chan; \
- struct lttng_ust_lib_ring_buffer_ctx __ctx; \
+ struct lttng_event *__event = (struct lttng_event *) __tp_data; \
+ struct lttng_channel *__chan = __event->chan; \
+ struct lttng_ust_lib_ring_buffer_ctx __ctx; \
+ struct lttng_stack_ctx __lttng_ctx; \
size_t __event_len, __event_align; \
size_t __dynamic_len_idx = 0; \
- size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \
+ const size_t __num_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_name) - 1; \
+ union { \
+ size_t __dynamic_len[__num_fields]; \
+ char __filter_stack_data[2 * sizeof(unsigned long) * __num_fields]; \
+ } __stackvar; \
int __ret; \
\
if (0) \
(void) __dynamic_len_idx; /* don't warn if unused */ \
+ if (!_TP_SESSION_CHECK(session, __chan->session)) \
+ return; \
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__##_provider##___##_name(__dynamic_len,\
- _TP_ARGS_VARS_DATA(_args)); \
- __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VARS(_args)); \
+ if (caa_unlikely(!TP_RCU_LINK_TEST())) \
+ return; \
+ if (caa_unlikely(!cds_list_empty(&__event->filter_bytecode_runtime_head))) { \
+ struct lttng_bytecode_runtime *__filter_bc_runtime; \
+ int __filter_record = __event->has_enablers_without_bytecode; \
+ \
+ __event_prepare_interpreter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \
+ _TP_ARGS_DATA_VAR(_args)); \
+ tp_list_for_each_entry_rcu(__filter_bc_runtime, &__event->filter_bytecode_runtime_head, node) { \
+ if (caa_unlikely(__filter_bc_runtime->interpreter_funcs.filter(__filter_bc_runtime, \
+ __stackvar.__filter_stack_data) & LTTNG_INTERPRETER_RECORD_FLAG)) { \
+ __filter_record = 1; \
+ break; \
+ } \
+ } \
+ if (caa_likely(!__filter_record)) \
+ return; \
+ } \
+ __event_len = __event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \
+ _TP_ARGS_DATA_VAR(_args)); \
+ __event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \
+ memset(&__lttng_ctx, 0, sizeof(__lttng_ctx)); \
+ __lttng_ctx.event = __event; \
+ __lttng_ctx.chan_ctx = tp_rcu_dereference(__chan->ctx); \
+ __lttng_ctx.event_ctx = tp_rcu_dereference(__event->ctx); \
lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
- __event_align, -1, __chan->handle); \
+ __event_align, -1, __chan->handle, &__lttng_ctx); \
+ __ctx.ip = _TP_IP_PARAM(TP_IP_PARAM); \
__ret = __chan->ops->event_reserve(&__ctx, __event->id); \
if (__ret < 0) \
return; \
__chan->ops->event_commit(&__ctx); \
}
-#include TRACEPOINT_INCLUDE(TRACEPOINT_INCLUDE_FILE)
+#include TRACEPOINT_INCLUDE
#undef __get_dynamic_len
/*
- * Stage 8 of the trace events.
+ * Stage 5.1 of tracepoint event generation.
*
- * Register/unregister probes at module load/unload.
+ * Create probe signature
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+#undef TP_ARGS
+#define TP_ARGS(...) __VA_ARGS__
+
+#define _TP_EXTRACT_STRING2(...) #__VA_ARGS__
+
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static const char __tp_event_signature___##_provider##___##_name[] = \
+ _TP_EXTRACT_STRING2(_args);
+
+#include TRACEPOINT_INCLUDE
+
+#undef _TP_EXTRACT_STRING2
+
+/*
+ * Stage 5.2 of tracepoint event generation.
+ *
+ * Create the event notifier probe function.
+ */
+#undef _TRACEPOINT_EVENT_CLASS
+#define _TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static lttng_ust_notrace \
+void __event_notifier_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)); \
+static \
+void __event_notifier_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args)) \
+{ \
+ struct lttng_event_notifier *__event_notifier = (struct lttng_event_notifier *) __tp_data; \
+ const size_t __num_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_name) - 1;\
+ union { \
+ size_t __dynamic_len[__num_fields]; \
+ char __interpreter_stack_data[2 * sizeof(unsigned long) * __num_fields]; \
+ } __stackvar; \
+ \
+ if (caa_unlikely(!CMM_ACCESS_ONCE(__event_notifier->enabled))) \
+ return; \
+ if (caa_unlikely(!TP_RCU_LINK_TEST())) \
+ return; \
+ if (caa_unlikely(!cds_list_empty(&__event_notifier->filter_bytecode_runtime_head))) { \
+ struct lttng_bytecode_runtime *__filter_bc_runtime; \
+ int __filter_record = __event_notifier->has_enablers_without_bytecode; \
+ \
+ __event_prepare_interpreter_stack__##_provider##___##_name(__stackvar.__interpreter_stack_data, \
+ _TP_ARGS_DATA_VAR(_args)); \
+ tp_list_for_each_entry_rcu(__filter_bc_runtime, &__event_notifier->filter_bytecode_runtime_head, node) { \
+ if (caa_unlikely(__filter_bc_runtime->interpreter_funcs.filter(__filter_bc_runtime, \
+ __stackvar.__interpreter_stack_data) & LTTNG_INTERPRETER_RECORD_FLAG)) \
+ __filter_record = 1; \
+ } \
+ if (caa_likely(!__filter_record)) \
+ return; \
+ } \
+ if (caa_unlikely(!cds_list_empty(&__event_notifier->capture_bytecode_runtime_head))) \
+ __event_prepare_interpreter_stack__##_provider##___##_name(__stackvar.__interpreter_stack_data, \
+ _TP_ARGS_DATA_VAR(_args)); \
+ \
+ __event_notifier->notification_send(__event_notifier, \
+ __stackvar.__interpreter_stack_data); \
+}
+
+#include TRACEPOINT_INCLUDE
+
+/*
+ * Stage 6 of tracepoint event generation.
+ *
+ * Tracepoint loglevel mapping definition generation. We generate a
+ * symbol for each mapping for a provider/event to ensure at most a 1 to
+ * 1 mapping between events and loglevels. If the symbol is repeated,
+ * the compiler will complain.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+/*
+ * Declare _loglevel___##__provider##___##__name as non-static, with
+ * hidden visibility for c++ handling of weakref. We do a weakref to the
+ * symbol in a later stage, which requires that the symbol is not
+ * mangled.
+ */
+#ifdef __cplusplus
+#define LTTNG_TP_EXTERN_C extern "C"
+#else
+#define LTTNG_TP_EXTERN_C
+#endif
+
+#undef TRACEPOINT_LOGLEVEL
+#define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \
+static const int _loglevel_value___##__provider##___##__name = __loglevel; \
+LTTNG_TP_EXTERN_C const int *_loglevel___##__provider##___##__name \
+ __attribute__((visibility("hidden"))) = \
+ &_loglevel_value___##__provider##___##__name;
+
+#include TRACEPOINT_INCLUDE
+
+#undef LTTNG_TP_EXTERN_C
+
+/*
+ * Stage 6.1 of tracepoint event generation.
+ *
+ * Tracepoint UML URI info.
*/
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
-#define TP_ID1(_token, _provider) _token##_provider
-#define TP_ID(_token, _provider) TP_ID1(_token, _provider)
+/*
+ * Declare _model_emf_uri___##__provider##___##__name as non-static,
+ * with hidden visibility for c++ handling of weakref. We do a weakref
+ * to the symbol in a later stage, which requires that the symbol is not
+ * mangled.
+ */
+#ifdef __cplusplus
+#define LTTNG_TP_EXTERN_C extern "C"
+#else
+#define LTTNG_TP_EXTERN_C
+#endif
-static void __attribute__((constructor))
-TP_ID(__lttng_events_init__, TRACEPOINT_PROVIDER)(void)
+#undef TRACEPOINT_MODEL_EMF_URI
+#define TRACEPOINT_MODEL_EMF_URI(__provider, __name, __uri) \
+LTTNG_TP_EXTERN_C const char *_model_emf_uri___##__provider##___##__name \
+ __attribute__((visibility("hidden"))) = __uri; \
+
+#include TRACEPOINT_INCLUDE
+
+#undef LTTNG_TP_EXTERN_C
+
+/*
+ * Stage 7.1 of tracepoint event generation.
+ *
+ * Create events description structures. We use a weakref because
+ * loglevels are optional. If not declared, the event will point to the
+ * a loglevel that contains NULL.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+#undef _TRACEPOINT_EVENT_INSTANCE
+#define _TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
+static const int * \
+ __ref_loglevel___##_provider##___##_name \
+ __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \
+static const char * \
+ __ref_model_emf_uri___##_provider##___##_name \
+ __attribute__((weakref ("_model_emf_uri___" #_provider "___" #_name)));\
+static const struct lttng_event_desc __event_desc___##_provider##_##_name = { \
+ .name = #_provider ":" #_name, \
+ .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\
+ .ctx = NULL, \
+ .fields = __event_fields___##_provider##___##_template, \
+ .nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template) - 1, \
+ .loglevel = &__ref_loglevel___##_provider##___##_name, \
+ .signature = __tp_event_signature___##_provider##___##_template, \
+ .u = { \
+ .ext = { \
+ .model_emf_uri = &__ref_model_emf_uri___##_provider##___##_name, \
+ .event_notifier_callback = (void (*)(void)) &__event_notifier_probe__##_provider##___##_template,\
+ }, \
+ }, \
+};
+
+#include TRACEPOINT_INCLUDE
+
+/*
+ * Stage 7.2 of tracepoint event generation.
+ *
+ * Create array of events.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+#undef _TRACEPOINT_EVENT_INSTANCE
+#define _TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
+ &__event_desc___##_provider##_##_name,
+
+static const struct lttng_event_desc *_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)[] = {
+#include TRACEPOINT_INCLUDE
+ NULL, /* Dummy, C99 forbids 0-len array. */
+};
+
+
+/*
+ * Stage 8 of tracepoint event generation.
+ *
+ * Create a toplevel descriptor for the whole probe.
+ */
+
+/* non-const because list head will be modified when registered. */
+static struct lttng_probe_desc _TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER) = {
+ .provider = __tp_stringify(TRACEPOINT_PROVIDER),
+ .event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER),
+ .nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)) - 1,
+ .head = { NULL, NULL },
+ .lazy_init_head = { NULL, NULL },
+ .lazy = 0,
+ .major = LTTNG_UST_PROVIDER_MAJOR,
+ .minor = LTTNG_UST_PROVIDER_MINOR,
+};
+
+static int _TP_COMBINE_TOKENS(__probe_register_refcount___, TRACEPOINT_PROVIDER);
+
+/*
+ * Stage 9 of tracepoint event generation.
+ *
+ * Register/unregister probes at module load/unload.
+ *
+ * Generate the constructor as an externally visible symbol for use when
+ * linking the probe statically.
+ *
+ * Register refcount is protected by libc dynamic loader mutex.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+static void lttng_ust_notrace __attribute__((constructor))
+_TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void);
+static void
+_TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void)
{
int ret;
- ret = ltt_probe_register(&TP_ID(__probe_desc___, TRACEPOINT_PROVIDER));
- assert(!ret);
+ if (_TP_COMBINE_TOKENS(__probe_register_refcount___,
+ TRACEPOINT_PROVIDER)++) {
+ return;
+ }
+ /*
+ * __tracepoint_provider_check_ ## TRACEPOINT_PROVIDER() is a
+ * static inline function that ensures every probe PROVIDER
+ * argument match the provider within which they appear. It
+ * calls empty static inline functions, and therefore has no
+ * runtime effect. However, if it detects an error, a linker
+ * error will appear.
+ */
+ _TP_COMBINE_TOKENS(__tracepoint_provider_check_, TRACEPOINT_PROVIDER)();
+ ret = lttng_probe_register(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
+ if (ret) {
+ fprintf(stderr, "LTTng-UST: Error (%d) while registering tracepoint probe.\n", ret);
+ abort();
+ }
}
-static void __attribute__((destructor))
-TP_ID(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void)
+static void lttng_ust_notrace __attribute__((destructor))
+_TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void);
+static void
+_TP_COMBINE_TOKENS(__lttng_events_exit__, TRACEPOINT_PROVIDER)(void)
{
- ltt_probe_unregister(&TP_ID(__probe_desc___, TRACEPOINT_PROVIDER));
+ if (--_TP_COMBINE_TOKENS(__probe_register_refcount___,
+ TRACEPOINT_PROVIDER)) {
+ return;
+ }
+ lttng_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
}
-#undef TP_ID1
-#undef TP_ID
+int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER)
+__attribute__((visibility("default")));
projects / lttng-ust.git / blobdiff