/*
* Copyright (c) 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <urcu/compiler.h>
#include <urcu/rculist.h>
#include <lttng/ust-events.h>
#include <lttng/ringbuffer-config.h>
#include <lttng/ust-compiler.h>
#include <lttng/tracepoint.h>
#include <byteswap.h>
#include <string.h>
#define __LTTNG_UST_NULL_STRING "(null)"
#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_bp((head)->next), __typeof__(*pos), member); \
&pos->member != (head); \
pos = cds_list_entry(tp_rcu_dereference_bp(pos->member.next), __typeof__(*pos), member))
/*
* 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 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))
/* 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 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>
static inline lttng_ust_notrace
void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void);
static inline
void _TP_COMBINE_TOKENS(__tracepoint_provider_mismatch_, TRACEPOINT_PROVIDER)(void)
{
}
#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) \
__tracepoint_provider_mismatch_##_provider();
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
}
/*
* 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 0.9 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 = { \
.signedness = lttng_is_signed_type(__typeof__(_value)), \
.value = lttng_is_signed_type(__typeof__(_value)) ? \
(long long) (_value) : (_value), \
}, \
.end = { \
.signedness = lttng_is_signed_type(__typeof__(_value)), \
.value = lttng_is_signed_type(__typeof__(_value)) ? \
(long long) (_value) : (_value), \
}, \
.string = (_string), \
},
/* Enumeration entry (range) */
#undef ctf_enum_range
#define ctf_enum_range(_string, _range_start, _range_end) \
{ \
.start = { \
.signedness = lttng_is_signed_type(__typeof__(_range_start)), \
.value = lttng_is_signed_type(__typeof__(_range_start)) ? \
(long long) (_range_start) : (_range_start), \
}, \
.end = { \
.signedness = lttng_is_signed_type(__typeof__(_range_end)), \
.value = lttng_is_signed_type(__typeof__(_range_end)) ? \
(long long) (_range_end) : (_range_end), \
}, \
.string = (_string), \
},
#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 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, _nowrite) \
{ \
.name = #_item, \
.type = __type_integer(_type, _byte_order, _base, none),\
.nowrite = _nowrite, \
},
#undef _ctf_float
#define _ctf_float(_type, _item, _src, _nowrite) \
{ \
.name = #_item, \
.type = __type_float(_type), \
.nowrite = _nowrite, \
},
#undef _ctf_array_encoded
#define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _nowrite) \
{ \
.name = #_item, \
.type = \
{ \
.atype = atype_array, \
.u = \
{ \
.array = \
{ \
.elem_type = __type_integer(_type, BYTE_ORDER, 10, _encoding), \
.length = _length, \
} \
} \
}, \
.nowrite = _nowrite, \
},
#undef _ctf_sequence_encoded
#define _ctf_sequence_encoded(_type, _item, _src, \
_length_type, _src_length, _encoding, _nowrite, \
_elem_type_base) \
{ \
.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, _elem_type_base, _encoding), \
}, \
}, \
}, \
.nowrite = _nowrite, \
},
#undef _ctf_string
#define _ctf_string(_item, _src, _nowrite) \
{ \
.name = #_item, \
.type = \
{ \
.atype = atype_string, \
.u = \
{ \
.basic = { .string = { .encoding = lttng_encode_UTF8 } } \
}, \
}, \
.nowrite = _nowrite, \
},
#undef _ctf_enum
#define _ctf_enum(_provider, _name, _type, _item, _src, _nowrite) \
{ \
.name = #_item, \
.type = { \
.atype = atype_enum, \
.u = { \
.basic = { \
.enumeration = { \
.desc = &__enum_##_provider##_##_name, \
.container_type = { \
.size = sizeof(_type) * CHAR_BIT, \
.alignment = lttng_alignof(_type) * CHAR_BIT, \
.signedness = lttng_is_signed_type(_type), \
.reverse_byte_order = 0, \
.base = 10, \
.encoding = lttng_encode_none, \
}, \
}, \
}, \
}, \
}, \
.nowrite = _nowrite, \
},
#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) \
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
/*
* Stage 2 of tracepoint event generation.
*
* Create probe callback prototypes.
*/
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#undef TP_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_DATA_PROTO(_args));
#include TRACEPOINT_INCLUDE
/*
* 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, _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, _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, _nowrite) \
__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, _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)); \
__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, _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(...) __VA_ARGS__
#undef TP_FIELDS
#define TP_FIELDS(...) __VA_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; \
\
if (0) \
(void) __dynamic_len_idx; /* don't warn if unused */ \
_fields \
return __event_len; \
}
#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, _length, _encoding, _nowrite) \
{ \
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, _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_filter_stack__##_provider##___##_name(char *__stack_data,\
_TP_ARGS_DATA_PROTO(_args)) \
{ \
_fields \
}
#include TRACEPOINT_INCLUDE
/*
* 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, _nowrite) \
__event_align = _tp_max_t(size_t, __event_align, lttng_alignof(_type));
#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, _nowrite) \
__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, _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, _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(...) __VA_ARGS__
#undef TP_FIELDS
#define TP_FIELDS(...) __VA_ARGS__
#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)) \
{ \
size_t __event_align = 1; \
_fields \
return __event_align; \
}
#include TRACEPOINT_INCLUDE
/*
* Stage 5 of tracepoint event generation.
*
* 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, _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, _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, _nowrite) \
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, _nowrite, _elem_type_base) \
{ \
_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));\
} \
lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \
__chan->ops->event_write(&__ctx, _src, \
sizeof(_type) * __get_dynamic_len(dest));
/*
* __chan->ops->u.has_strcpy is a flag letting us know if the LTTng-UST
* tracepoint provider ABI implements event_strcpy. This dynamic check
* can be removed when the tracepoint provider ABI moves to 2.
*/
#if (LTTNG_UST_PROVIDER_MAJOR > 1)
#error "Tracepoint probe provider major version has changed. Please remove dynamic check for has_strcpy."
#endif
#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)); \
if (__chan->ops->u.has_strcpy) \
__chan->ops->event_strcpy(&__ctx, __ctf_tmp_string, \
__get_dynamic_len(dest)); \
else \
__chan->ops->event_write(&__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) __stackvar.__dynamic_len[__dynamic_len_idx++]
#undef TP_ARGS
#define TP_ARGS(...) __VA_ARGS__
#undef TP_FIELDS
#define TP_FIELDS(...) __VA_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 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; \
union { \
size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name) - 1]; \
char __filter_stack_data[2 * sizeof(unsigned long) * (_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name) - 1)]; \
} __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; \
if (caa_unlikely(!TP_RCU_LINK_TEST())) \
return; \
if (caa_unlikely(!cds_list_empty(&__event->bytecode_runtime_head))) { \
struct lttng_bytecode_runtime *bc_runtime; \
int __filter_record = __event->has_enablers_without_bytecode; \
\
__event_prepare_filter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \
_TP_ARGS_DATA_VAR(_args)); \
tp_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
if (caa_unlikely(bc_runtime->filter(bc_runtime, \
__stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \
__filter_record = 1; \
} \
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_bp(__chan->ctx); \
__lttng_ctx.event_ctx = tp_rcu_dereference_bp(__event->ctx); \
lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
__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; \
_fields \
__chan->ops->event_commit(&__ctx); \
}
#include TRACEPOINT_INCLUDE
#undef __get_dynamic_len
/*
* Stage 5.1 of tracepoint event generation.
*
* 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 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>
#undef TRACEPOINT_LOGLEVEL
#define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \
static const int _loglevel_value___##__provider##___##__name = __loglevel; \
static const int *_loglevel___##__provider##___##__name = \
&_loglevel_value___##__provider##___##__name;
#include TRACEPOINT_INCLUDE
/*
* Stage 6.1 of tracepoint event generation.
*
* Tracepoint UML URI info.
*/
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#undef TRACEPOINT_MODEL_EMF_URI
#define TRACEPOINT_MODEL_EMF_URI(__provider, __name, __uri) \
static const char *_model_emf_uri___##__provider##___##__name = __uri;
#include TRACEPOINT_INCLUDE
/*
* 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, \
}, \
}, \
};
#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;
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. Duplicate registration of tracepoint probes having the same name is not allowed.\n", ret);
abort();
}
}
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)
{
if (--_TP_COMBINE_TOKENS(__probe_register_refcount___,
TRACEPOINT_PROVIDER)) {
return;
}
lttng_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
}
int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER);