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ust-tracepoint-event.h
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ust-tracepoint-event.h
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/*
* SPDX-License-Identifier: MIT
*
* 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/ust-ringbuffer-context.h>
#include <lttng/ust-arch.h>
#include <lttng/ust-compiler.h>
#include <lttng/tracepoint.h>
#include <lttng/ust-endian.h>
#include <lttng/ust-api-compat.h>
#include <string.h>
#include <lttng/ust-api-compat.h>
#if LTTNG_UST_COMPAT_API(0)
#define TP_FIELDS LTTNG_UST_TP_FIELDS
#define ctf_integer lttng_ust_field_integer
#define ctf_integer_hex lttng_ust_field_integer_hex
#define ctf_integer_network lttng_ust_field_integer_network
#define ctf_integer_network_hex lttng_ust_field_integer_network_hex
#define ctf_integer_nowrite lttng_ust_field_integer_nowrite
#define ctf_float lttng_ust_field_float
#define ctf_float_nowrite lttng_ust_field_float_nowrite
#define ctf_array lttng_ust_field_array
#define ctf_array_hex lttng_ust_field_array_hex
#define ctf_array_network lttng_ust_field_array_network
#define ctf_array_network_hex lttng_ust_field_array_network_hex
#define ctf_array_text lttng_ust_field_array_text
#define ctf_array_nowrite lttng_ust_field_array_nowrite
#define ctf_array_nowrite_hex lttng_ust_field_array_nowrite_hex
#define ctf_array_network_nowrite lttng_ust_field_array_network_nowrite
#define ctf_array_network_nowrite_hex lttng_ust_field_array_network_nowrite_hex
#define ctf_array_text_nowrite lttng_ust_field_array_text_nowrite
#define ctf_sequence lttng_ust_field_sequence
#define ctf_sequence_hex lttng_ust_field_sequence_hex
#define ctf_sequence_network lttng_ust_field_sequence_network
#define ctf_sequence_network_hex lttng_ust_field_sequence_network_hex
#define ctf_sequence_text lttng_ust_field_sequence_text
#define ctf_sequence_nowrite lttng_ust_field_sequence_nowrite
#define ctf_sequence_nowrite_hex lttng_ust_field_sequence_nowrite_hex
#define ctf_sequence_network_nowrite lttng_ust_field_sequence_network_nowrite
#define ctf_sequence_network_nowrite_hex lttng_ust_field_sequence_network_nowrite_hex
#define ctf_sequence_text_nowrite lttng_ust_field_sequence_text_nowrite
#define ctf_string lttng_ust_field_string
#define ctf_string_nowrite lttng_ust_field_string_nowrite
#define ctf_unused lttng_ust_field_unused
#define ctf_unused_nowrite lttng_ust_field_unused_nowrite
#define ctf_enum lttng_ust_field_enum
#define ctf_enum_nowrite lttng_ust_field_enum_nowrite
#define ctf_enum_value lttng_ust_field_enum_value
#define ctf_enum_range lttng_ust_field_enum_range
#define ctf_enum_auto lttng_ust_field_enum_auto
#endif /* #if LTTNG_UST_COMPAT_API(0) */
#define LTTNG_UST__NULL_STRING "(null)"
/*
* LTTNG_UST_TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the
* same arguments and having the same field layout.
*
* LTTNG_UST_TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with
* its own provider and name. It refers to a class (template).
*
* LTTNG_UST_TRACEPOINT_EVENT declared both a class and an instance and does a
* direct mapping from the instance to the class.
*/
#undef LTTNG_UST_TRACEPOINT_EVENT
#define LTTNG_UST_TRACEPOINT_EVENT(_provider, _name, _args, _fields) \
LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, \
LTTNG_UST__TP_PARAMS(_args), \
LTTNG_UST__TP_PARAMS(_fields)) \
LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_provider, _name, _provider, _name, \
LTTNG_UST__TP_PARAMS(_args))
#undef LTTNG_UST_TRACEPOINT_EVENT_CLASS
#define LTTNG_UST_TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, LTTNG_UST__TP_PARAMS(_args), LTTNG_UST__TP_PARAMS(_fields))
#undef LTTNG_UST_TRACEPOINT_EVENT_INSTANCE
#define LTTNG_UST_TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, _args) \
LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, LTTNG_UST__TP_PARAMS(_args))
/* Helpers */
#define LTTNG_UST__TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#define lttng_ust__tp_max_t(type, x, y) \
({ \
type lttng_ust__max1 = (x); \
type lttng_ust__max2 = (y); \
lttng_ust__max1 > lttng_ust__max2 ? lttng_ust__max1: lttng_ust__max2; \
})
/*
* Stage 0 of tracepoint event generation.
*
* Check that each LTTNG_UST_TRACEPOINT_EVENT provider argument match the
* LTTNG_UST_TRACEPOINT_PROVIDER by creating dummy callbacks.
*/
/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
static inline
void LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust_tracepoint_provider_mismatch_, LTTNG_UST_TRACEPOINT_PROVIDER)(void)
lttng_ust_notrace;
static inline
void LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust_tracepoint_provider_mismatch_, LTTNG_UST_TRACEPOINT_PROVIDER)(void)
{
}
#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
lttng_ust_tracepoint_provider_mismatch_##_provider();
#undef LTTNG_UST__TRACEPOINT_EVENT_INSTANCE
#define LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, _args) \
lttng_ust_tracepoint_provider_mismatch_##_provider();
static inline
void LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust_tracepoint_provider_check_, LTTNG_UST_TRACEPOINT_PROVIDER)(void)
lttng_ust_notrace;
static inline
void LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust_tracepoint_provider_check_, LTTNG_UST_TRACEPOINT_PROVIDER)(void)
{
#include LTTNG_UST_TRACEPOINT_INCLUDE
}
/*
* Stage 0.1 of tracepoint event generation.
*
* Check that each LTTNG_UST_TRACEPOINT_EVENT provider:name does not exceed the
* tracepoint name length limit.
*/
/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#undef LTTNG_UST__TRACEPOINT_EVENT_INSTANCE
#define LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, _args) \
lttng_ust_tracepoint_validate_name_len(_provider, _name);
#include LTTNG_UST_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 LTTNG_UST_TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#undef LTTNG_UST_TP_ARGS
#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
#undef LTTNG_UST__TRACEPOINT_EVENT_INSTANCE
#define LTTNG_UST__TRACEPOINT_EVENT_INSTANCE(_template_provider, _template_name, _provider, _name, _args) \
void lttng_ust__event_template_proto___##_template_provider##___##_template_name(LTTNG_UST__TP_ARGS_DATA_PROTO(_args));
#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
void lttng_ust__event_template_proto___##_provider##___##_name(LTTNG_UST__TP_ARGS_DATA_PROTO(_args));
#include LTTNG_UST_TRACEPOINT_INCLUDE
/*
* Stage 0.9 of tracepoint event generation
*
* Unfolding the enums
*/
#include <lttng/ust-tracepoint-event-reset.h>
/* Enumeration entry (single value) */
#undef lttng_ust_field_enum_value
#define lttng_ust_field_enum_value(_string, _value) \
LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_enum_entry, { \
.struct_size = sizeof(struct lttng_ust_enum_entry), \
.start = { \
.value = lttng_ust_is_signed_type(__typeof__(_value)) ? \
(long long) (_value) : (_value), \
.signedness = lttng_ust_is_signed_type(__typeof__(_value)), \
}, \
.end = { \
.value = lttng_ust_is_signed_type(__typeof__(_value)) ? \
(long long) (_value) : (_value), \
.signedness = lttng_ust_is_signed_type(__typeof__(_value)), \
}, \
.string = (_string), \
}),
/* Enumeration entry (range) */
#undef lttng_ust_field_enum_range
#define lttng_ust_field_enum_range(_string, _range_start, _range_end) \
LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_enum_entry, { \
.struct_size = sizeof(struct lttng_ust_enum_entry), \
.start = { \
.value = lttng_ust_is_signed_type(__typeof__(_range_start)) ? \
(long long) (_range_start) : (_range_start), \
.signedness = lttng_ust_is_signed_type(__typeof__(_range_start)), \
}, \
.end = { \
.value = lttng_ust_is_signed_type(__typeof__(_range_end)) ? \
(long long) (_range_end) : (_range_end), \
.signedness = lttng_ust_is_signed_type(__typeof__(_range_end)), \
}, \
.string = (_string), \
}),
/* Enumeration entry (automatic value; follows the rules of CTF) */
#undef lttng_ust_field_enum_auto
#define lttng_ust_field_enum_auto(_string) \
LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_enum_entry, { \
.struct_size = sizeof(struct lttng_ust_enum_entry), \
.start = { \
.value = -1ULL, \
.signedness = 0, \
}, \
.end = { \
.value = -1ULL, \
.signedness = 0, \
}, \
.string = (_string), \
.options = LTTNG_UST_ENUM_ENTRY_OPTION_IS_AUTO, \
}),
#undef LTTNG_UST_TP_ENUM_VALUES
#define LTTNG_UST_TP_ENUM_VALUES(...) \
__VA_ARGS__
#if LTTNG_UST_COMPAT_API(0)
# undef TP_ENUM_VALUES
# define TP_ENUM_VALUES LTTNG_UST_TP_ENUM_VALUES
#endif /* #if LTTNG_UST_COMPAT_API(0) */
#undef LTTNG_UST_TRACEPOINT_ENUM
#define LTTNG_UST_TRACEPOINT_ENUM(_provider, _name, _values) \
const struct lttng_ust_enum_entry * const __enum_values__##_provider##_##_name[] = { \
_values \
lttng_ust_field_enum_value("", 0) /* Dummy, 0-len array forbidden by C99. */ \
};
#include LTTNG_UST_TRACEPOINT_INCLUDE
/*
* Stage 0.9.1
* Verifying array and sequence elements are of an integer type.
*/
/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#include <lttng/ust-tracepoint-event-write.h>
#include <lttng/ust-tracepoint-event-nowrite.h>
#undef lttng_ust__field_array_encoded
#define lttng_ust__field_array_encoded(_type, _item, _src, _byte_order, \
_length, _encoding, _nowrite, \
_elem_type_base) \
lttng_ust_field_array_element_type_is_supported(_type, _item);
#undef lttng_ust__field_sequence_encoded
#define lttng_ust__field_sequence_encoded(_type, _item, _src, _byte_order, \
_length_type, _src_length, _encoding, _nowrite, \
_elem_type_base) \
lttng_ust_field_array_element_type_is_supported(_type, _item);
#undef LTTNG_UST_TP_FIELDS
#define LTTNG_UST_TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
_fields
#include LTTNG_UST_TRACEPOINT_INCLUDE
/*
* Stage 0.9.2 of tracepoint event generation.
*
* Create probe signature
*/
/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#undef LTTNG_UST_TP_ARGS
#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
#define LTTNG_UST__TP_EXTRACT_STRING2(...) #__VA_ARGS__
#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
static const char __tp_event_signature___##_provider##___##_name[] = \
LTTNG_UST__TP_EXTRACT_STRING2(_args);
#include LTTNG_UST_TRACEPOINT_INCLUDE
#undef LTTNG_UST__TP_EXTRACT_STRING2
/*
* Stage 1 of tracepoint event generation.
*
* Create probe callback prototypes.
*/
/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#undef LTTNG_UST_TP_ARGS
#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
static void lttng_ust__event_probe__##_provider##___##_name(LTTNG_UST__TP_ARGS_DATA_PROTO(_args));
#include LTTNG_UST_TRACEPOINT_INCLUDE
/*
* Stage 1.1 of tracepoint event generation.
*
* Declare toplevel descriptor for the whole probe.
* Unlike C, C++ does not allow tentative definitions. Therefore, we
* need to explicitly declare the variable with "extern", using hidden
* visibility to keep this symbol from being exported to the global
* symbol table.
*/
extern const struct lttng_ust_probe_desc LTTNG_UST__TP_COMBINE_TOKENS(lttng_ust__probe_desc___, LTTNG_UST_TRACEPOINT_PROVIDER)
__attribute__((visibility("hidden")));
/*
* Stage 2 of tracepoint event generation.
*
* Create event field type metadata section.
* Each event produce an array of fields.
*/
/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#include <lttng/ust-tracepoint-event-write.h>
#include <lttng/ust-tracepoint-event-nowrite.h>
#undef lttng_ust__field_integer_ext
#define lttng_ust__field_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
.struct_size = sizeof(struct lttng_ust_event_field), \
.name = #_item, \
.type = lttng_ust_type_integer_define(_type, _byte_order, _base), \
.nowrite = _nowrite, \
.nofilter = 0, \
}),
#undef lttng_ust__field_float
#define lttng_ust__field_float(_type, _item, _src, _nowrite) \
LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
.struct_size = sizeof(struct lttng_ust_event_field), \
.name = #_item, \
.type = lttng_ust_type_float_define(_type), \
.nowrite = _nowrite, \
.nofilter = 0, \
}),
#undef lttng_ust__field_array_encoded
#define lttng_ust__field_array_encoded(_type, _item, _src, _byte_order, \
_length, _encoding, _nowrite, \
_elem_type_base) \
LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
.struct_size = sizeof(struct lttng_ust_event_field), \
.name = #_item, \
.type = (const struct lttng_ust_type_common *) LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_type_array, { \
.parent = { \
.type = lttng_ust_type_array, \
}, \
.struct_size = sizeof(struct lttng_ust_type_array), \
.elem_type = lttng_ust_type_integer_define(_type, _byte_order, _elem_type_base), \
.length = _length, \
.alignment = 0, \
.encoding = lttng_ust_string_encoding_##_encoding, \
}), \
.nowrite = _nowrite, \
.nofilter = 0, \
}),
#undef lttng_ust__field_sequence_encoded
#define lttng_ust__field_sequence_encoded(_type, _item, _src, _byte_order, \
_length_type, _src_length, _encoding, _nowrite, \
_elem_type_base) \
LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
.struct_size = sizeof(struct lttng_ust_event_field), \
.name = "_" #_item "_length", \
.type = lttng_ust_type_integer_define(_length_type, LTTNG_UST_BYTE_ORDER, 10), \
.nowrite = _nowrite, \
.nofilter = 1, \
}), \
LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
.struct_size = sizeof(struct lttng_ust_event_field), \
.name = #_item, \
.type = (const struct lttng_ust_type_common *) LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_type_sequence, { \
.parent = { \
.type = lttng_ust_type_sequence, \
}, \
.struct_size = sizeof(struct lttng_ust_type_sequence), \
.length_name = NULL, /* Use previous field. */ \
.elem_type = lttng_ust_type_integer_define(_type, _byte_order, _elem_type_base), \
.alignment = 0, \
.encoding = lttng_ust_string_encoding_##_encoding, \
}), \
.nowrite = _nowrite, \
.nofilter = 0, \
}),
#undef lttng_ust__field_string
#define lttng_ust__field_string(_item, _src, _nowrite) \
LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
.struct_size = sizeof(struct lttng_ust_event_field), \
.name = #_item, \
.type = (const struct lttng_ust_type_common *) LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_type_string, { \
.parent = { \
.type = lttng_ust_type_string, \
}, \
.struct_size = sizeof(struct lttng_ust_type_string), \
.encoding = lttng_ust_string_encoding_UTF8, \
}), \
.nowrite = _nowrite, \
.nofilter = 0, \
}),
#undef lttng_ust__field_unused
#define lttng_ust__field_unused(_src)
#undef lttng_ust__field_enum
#define lttng_ust__field_enum(_provider, _name, _type, _item, _src, _nowrite) \
LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_event_field, { \
.struct_size = sizeof(struct lttng_ust_event_field), \
.name = #_item, \
.type = (const struct lttng_ust_type_common *) LTTNG_UST_COMPOUND_LITERAL(const struct lttng_ust_type_enum, { \
.parent = { \
.type = lttng_ust_type_enum, \
}, \
.struct_size = sizeof(struct lttng_ust_type_enum), \
.desc = &__enum_##_provider##_##_name, \
.container_type = lttng_ust_type_integer_define(_type, LTTNG_UST_BYTE_ORDER, 10), \
}), \
.nowrite = _nowrite, \
.nofilter = 0, \
}),
#undef LTTNG_UST_TP_FIELDS
#define LTTNG_UST_TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
static const struct lttng_ust_event_field * const lttng_ust__event_fields___##_provider##___##_name[] = { \
_fields \
lttng_ust_field_integer(int, dummy, 0) /* Dummy, C99 forbids 0-len array. */ \
}; \
static const struct lttng_ust_tracepoint_class lttng_ust__event_class___##_provider##___##_name = { \
.struct_size = sizeof(struct lttng_ust_tracepoint_class), \
.fields = lttng_ust__event_fields___##_provider##___##_name, \
.nr_fields = LTTNG_UST__TP_ARRAY_SIZE(lttng_ust__event_fields___##_provider##___##_name) - 1, \
.probe_callback = (void (*)(void)) <tng_ust__event_probe__##_provider##___##_name, \
.signature = __tp_event_signature___##_provider##___##_name, \
.probe_desc = <tng_ust__probe_desc___##_provider, \
};
#undef LTTNG_UST_TRACEPOINT_ENUM
#define LTTNG_UST_TRACEPOINT_ENUM(_provider, _name, _values) \
static const struct lttng_ust_enum_desc __enum_##_provider##_##_name = { \
.struct_size = sizeof(struct lttng_ust_enum_desc), \
.name = #_provider "_" #_name, \
.entries = __enum_values__##_provider##_##_name, \
.nr_entries = LTTNG_UST__TP_ARRAY_SIZE(__enum_values__##_provider##_##_name) - 1, \
.probe_desc = <tng_ust__probe_desc___##_provider, \
};
#include LTTNG_UST_TRACEPOINT_INCLUDE
/*
* Stage 3.0 of tracepoint event generation.
*
* Create static inline function that calculates event size.
*/
/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#include <lttng/ust-tracepoint-event-write.h>
#undef lttng_ust__field_integer_ext
#define lttng_ust__field_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
if (0) \
(void) (_src); /* Unused */ \
__event_len += lttng_ust_ring_buffer_align(__event_len, lttng_ust_rb_alignof(_type)); \
__event_len += sizeof(_type);
#undef lttng_ust__field_float
#define lttng_ust__field_float(_type, _item, _src, _nowrite) \
if (0) \
(void) (_src); /* Unused */ \
__event_len += lttng_ust_ring_buffer_align(__event_len, lttng_ust_rb_alignof(_type)); \
__event_len += sizeof(_type);
#undef lttng_ust__field_array_encoded
#define lttng_ust__field_array_encoded(_type, _item, _src, _byte_order, _length, _encoding, \
_nowrite, _elem_type_base) \
if (0) \
(void) (_src); /* Unused */ \
__event_len += lttng_ust_ring_buffer_align(__event_len, lttng_ust_rb_alignof(_type)); \
__event_len += sizeof(_type) * (_length);
#undef lttng_ust__field_sequence_encoded
#define lttng_ust__field_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
_src_length, _encoding, _nowrite, _elem_type_base) \
if (0) \
(void) (_src); /* Unused */ \
__event_len += lttng_ust_ring_buffer_align(__event_len, lttng_ust_rb_alignof(_length_type)); \
__event_len += sizeof(_length_type); \
__event_len += lttng_ust_ring_buffer_align(__event_len, lttng_ust_rb_alignof(_type)); \
__dynamic_len[__dynamic_len_idx] = (_src_length); \
__event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \
__dynamic_len_idx++;
#undef lttng_ust__field_string
#define lttng_ust__field_string(_item, _src, _nowrite) \
__event_len += __dynamic_len[__dynamic_len_idx++] = \
strlen((_src) ? (_src) : LTTNG_UST__NULL_STRING) + 1;
#undef lttng_ust__field_unused
#define lttng_ust__field_unused(_src) \
if (0) \
(void) (_src); /* Unused */
#undef lttng_ust__field_enum
#define lttng_ust__field_enum(_provider, _name, _type, _item, _src, _nowrite) \
lttng_ust__field_integer_ext(_type, _item, _src, LTTNG_UST_BYTE_ORDER, 10, _nowrite)
#undef LTTNG_UST_TP_ARGS
#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
#undef LTTNG_UST_TP_FIELDS
#define LTTNG_UST_TP_FIELDS(...) __VA_ARGS__
#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
static inline \
size_t lttng_ust__event_get_size__##_provider##___##_name(size_t *__dynamic_len, LTTNG_UST__TP_ARGS_DATA_PROTO(_args)) \
lttng_ust_notrace; \
static inline \
size_t lttng_ust__event_get_size__##_provider##___##_name( \
size_t *__dynamic_len __attribute__((__unused__)), \
LTTNG_UST__TP_ARGS_DATA_PROTO(_args)) \
{ \
size_t __event_len = 0; \
unsigned int __dynamic_len_idx __attribute__((__unused__)) = 0; \
\
if (0) \
(void) __tp_data; /* don't warn if unused */ \
\
_fields \
return __event_len; \
}
#include LTTNG_UST_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 LTTNG_UST_TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#include <lttng/ust-tracepoint-event-write.h>
#include <lttng/ust-tracepoint-event-nowrite.h>
#undef lttng_ust__field_integer_ext
#define lttng_ust__field_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
if (lttng_ust_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 != LTTNG_UST_BYTE_ORDER) \
__tmp.v = lttng_ust_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 != LTTNG_UST_BYTE_ORDER) \
__tmp.v = lttng_ust_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 != LTTNG_UST_BYTE_ORDER) \
__tmp.v = lttng_ust_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 != LTTNG_UST_BYTE_ORDER) \
__tmp.v = lttng_ust_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 != LTTNG_UST_BYTE_ORDER) \
__tmp.v = lttng_ust_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 != LTTNG_UST_BYTE_ORDER) \
__tmp.v = lttng_ust_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 lttng_ust__field_float
#define lttng_ust__field_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 lttng_ust__field_array_encoded
#define lttng_ust__field_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 lttng_ust__field_sequence_encoded
#define lttng_ust__field_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 lttng_ust__field_string
#define lttng_ust__field_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 lttng_ust__field_unused
#define lttng_ust__field_unused(_src) \
if (0) \
(void) (_src);
#undef lttng_ust__field_enum
#define lttng_ust__field_enum(_provider, _name, _type, _item, _src, _nowrite) \
lttng_ust__field_integer_ext(_type, _item, _src, LTTNG_UST_BYTE_ORDER, 10, _nowrite)
#undef LTTNG_UST_TP_ARGS
#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
#undef LTTNG_UST_TP_FIELDS
#define LTTNG_UST_TP_FIELDS(...) __VA_ARGS__
#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
static inline \
void lttng_ust__event_prepare_interpreter_stack__##_provider##___##_name(char *__stack_data,\
LTTNG_UST__TP_ARGS_DATA_PROTO(_args)) \
{ \
if (0) { \
(void) __tp_data; /* don't warn if unused */ \
(void) __stack_data; /* don't warn if unused */ \
} \
\
_fields \
}
#include LTTNG_UST_TRACEPOINT_INCLUDE
/*
* Stage 4 of tracepoint event generation.
*
* Create static inline function that calculates event payload alignment.
*/
/* Reset all macros within LTTNG_UST_TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#include <lttng/ust-tracepoint-event-write.h>
#undef lttng_ust__field_integer_ext
#define lttng_ust__field_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
if (0) \
(void) (_src); /* Unused */ \
__event_align = lttng_ust__tp_max_t(size_t, __event_align, lttng_ust_rb_alignof(_type));
#undef lttng_ust__field_float
#define lttng_ust__field_float(_type, _item, _src, _nowrite) \
if (0) \
(void) (_src); /* Unused */ \
__event_align = lttng_ust__tp_max_t(size_t, __event_align, lttng_ust_rb_alignof(_type));
#undef lttng_ust__field_array_encoded
#define lttng_ust__field_array_encoded(_type, _item, _src, _byte_order, _length, \
_encoding, _nowrite, _elem_type_base) \
if (0) \
(void) (_src); /* Unused */ \
__event_align = lttng_ust__tp_max_t(size_t, __event_align, lttng_ust_rb_alignof(_type));
#undef lttng_ust__field_sequence_encoded
#define lttng_ust__field_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
_src_length, _encoding, _nowrite, _elem_type_base) \
if (0) \
(void) (_src); /* Unused */ \
if (0) \
(void) (_src_length); /* Unused */ \
__event_align = lttng_ust__tp_max_t(size_t, __event_align, lttng_ust_rb_alignof(_length_type)); \
__event_align = lttng_ust__tp_max_t(size_t, __event_align, lttng_ust_rb_alignof(_type));
#undef lttng_ust__field_string
#define lttng_ust__field_string(_item, _src, _nowrite) \
if (0) \
(void) (_src); /* Unused */
#undef lttng_ust__field_unused
#define lttng_ust__field_unused(_src) \
if (0) \
(void) (_src); /* Unused */
#undef lttng_ust__field_enum
#define lttng_ust__field_enum(_provider, _name, _type, _item, _src, _nowrite) \
lttng_ust__field_integer_ext(_type, _item, _src, LTTNG_UST_BYTE_ORDER, 10, _nowrite)
#undef LTTNG_UST_TP_ARGS
#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
#undef LTTNG_UST_TP_FIELDS
#define LTTNG_UST_TP_FIELDS(...) __VA_ARGS__
#undef LTTNG_UST__TRACEPOINT_EVENT_CLASS
#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
static inline \
size_t lttng_ust__event_get_align__##_provider##___##_name(LTTNG_UST__TP_ARGS_PROTO(_args)) \
lttng_ust_notrace; \
static inline \
size_t lttng_ust__event_get_align__##_provider##___##_name(LTTNG_UST__TP_ARGS_PROTO(_args)) \
{ \
size_t __event_align = 1; \
_fields \
return __event_align; \
}
#include LTTNG_UST_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 LTTNG_UST_TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
#include <lttng/ust-tracepoint-event-write.h>
#undef lttng_ust__field_integer_ext
#define lttng_ust__field_integer_ext(_type, _item, _src, _byte_order, _base, _nowrite) \
{ \
_type __tmp = (_src); \
__chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp), lttng_ust_rb_alignof(__tmp));\
}
#undef lttng_ust__field_float
#define lttng_ust__field_float(_type, _item, _src, _nowrite) \
{ \
_type __tmp = (_src); \
__chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp), lttng_ust_rb_alignof(__tmp));\
}
#undef lttng_ust__field_array_encoded
#define lttng_ust__field_array_encoded(_type, _item, _src, _byte_order, _length, \
_encoding, _nowrite, _elem_type_base) \
if (lttng_ust_string_encoding_##_encoding == lttng_ust_string_encoding_none) \
__chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length), lttng_ust_rb_alignof(_type)); \
else \
__chan->ops->event_pstrcpy_pad(&__ctx, (const char *) (_src), _length); \
#undef lttng_ust__field_sequence_encoded
#define lttng_ust__field_sequence_encoded(_type, _item, _src, _byte_order, _length_type, \
_src_length, _encoding, _nowrite, _elem_type_base) \
{ \
_length_type __tmpl = __stackvar.__dynamic_len[__dynamic_len_idx]; \
__chan->ops->event_write(&__ctx, &__tmpl, sizeof(_length_type), lttng_ust_rb_alignof(_length_type));\
} \
if (lttng_ust_string_encoding_##_encoding == lttng_ust_string_encoding_none) \
__chan->ops->event_write(&__ctx, _src, \
sizeof(_type) * lttng_ust__get_dynamic_len(dest), lttng_ust_rb_alignof(_type)); \
else \
__chan->ops->event_pstrcpy_pad(&__ctx, (const char *) (_src), lttng_ust__get_dynamic_len(dest)); \
#undef lttng_ust__field_string
#define lttng_ust__field_string(_item, _src, _nowrite) \
{ \
const char *__ctf_tmp_string = \
((_src) ? (_src) : LTTNG_UST__NULL_STRING); \
__chan->ops->event_strcpy(&__ctx, __ctf_tmp_string, \
lttng_ust__get_dynamic_len(dest)); \
}
#undef lttng_ust__field_unused
#define lttng_ust__field_unused(_src)
#undef lttng_ust__field_enum
#define lttng_ust__field_enum(_provider, _name, _type, _item, _src, _nowrite) \
lttng_ust__field_integer_ext(_type, _item, _src, LTTNG_UST_BYTE_ORDER, 10, _nowrite)
/* Beware: this get len actually consumes the len value */
#undef lttng_ust__get_dynamic_len
#define lttng_ust__get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++]
#undef LTTNG_UST_TP_ARGS
#define LTTNG_UST_TP_ARGS(...) __VA_ARGS__
#undef LTTNG_UST_TP_FIELDS
#define LTTNG_UST_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 LTTNG_UST__TP_SESSION_CHECK
#ifdef LTTNG_UST_TP_SESSION_CHECK
#define LTTNG_UST__TP_SESSION_CHECK(session, csession) (session == csession)
#else /* TP_SESSION_CHECK */
#define LTTNG_UST__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 LTTNG_UST__TP_IP_PARAM
#ifdef LTTNG_UST_TP_IP_PARAM
#define LTTNG_UST__TP_IP_PARAM(x) (x)
#else /* TP_IP_PARAM */
#if defined(LTTNG_UST_ARCH_PPC) && !defined(LTTNG_UST_ARCH_PPC64)
#define LTTNG_UST__TP_IP_PARAM(x) NULL
#else
#define LTTNG_UST__TP_IP_PARAM(x) __builtin_return_address(0)
#endif
#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 LTTNG_UST__TRACEPOINT_EVENT_CLASS
#define LTTNG_UST__TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
static \
void lttng_ust__event_probe__##_provider##___##_name(LTTNG_UST__TP_ARGS_DATA_PROTO(_args)) \
lttng_ust_notrace; \
static \
void lttng_ust__event_probe__##_provider##___##_name(LTTNG_UST__TP_ARGS_DATA_PROTO(_args)) \
{ \
struct lttng_ust_event_common *__event = (struct lttng_ust_event_common *) __tp_data; \
size_t __dynamic_len_idx = 0; \
const size_t __num_fields = LTTNG_UST__TP_ARRAY_SIZE(lttng_ust__event_fields___##_provider##___##_name) - 1; \
struct lttng_ust_probe_ctx __probe_ctx; \
union { \
size_t __dynamic_len[__num_fields]; \
char __interpreter_stack_data[2 * sizeof(unsigned long) * __num_fields]; \
} __stackvar; \
int __ret; \
bool __interpreter_stack_prepared = false; \
\
if (0) \
(void) __dynamic_len_idx; /* don't warn if unused */ \
switch (__event->type) { \
case LTTNG_UST_EVENT_TYPE_RECORDER: \
{ \
struct lttng_ust_event_recorder *__event_recorder = (struct lttng_ust_event_recorder *) __event->child; \
struct lttng_ust_channel_buffer *__chan = __event_recorder->chan; \
struct lttng_ust_channel_common *__chan_common = __chan->parent; \
\
if (!LTTNG_UST__TP_SESSION_CHECK(session, __chan_common->session)) \
return; \
if (caa_unlikely(!CMM_ACCESS_ONCE(__chan_common->session->active))) \
return; \
if (caa_unlikely(!CMM_ACCESS_ONCE(__chan_common->enabled))) \
return; \
break; \
} \
case LTTNG_UST_EVENT_TYPE_NOTIFIER: \
break; \
} \
if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \
return; \
if (caa_unlikely(!LTTNG_UST_TP_RCU_LINK_TEST())) \
return; \
__probe_ctx.struct_size = sizeof(struct lttng_ust_probe_ctx); \
__probe_ctx.ip = LTTNG_UST__TP_IP_PARAM(LTTNG_UST_TP_IP_PARAM); \
if (caa_unlikely(CMM_ACCESS_ONCE(__event->eval_filter))) { \
lttng_ust__event_prepare_interpreter_stack__##_provider##___##_name(__stackvar.__interpreter_stack_data, \
LTTNG_UST__TP_ARGS_DATA_VAR(_args)); \
__interpreter_stack_prepared = true; \
if (caa_likely(__event->run_filter(__event, \
__stackvar.__interpreter_stack_data, &__probe_ctx, NULL) != LTTNG_UST_EVENT_FILTER_ACCEPT)) \
return; \
} \
switch (__event->type) { \
case LTTNG_UST_EVENT_TYPE_RECORDER: \
{ \
size_t __event_len, __event_align; \
struct lttng_ust_event_recorder *__event_recorder = (struct lttng_ust_event_recorder *) __event->child; \
struct lttng_ust_channel_buffer *__chan = __event_recorder->chan; \
struct lttng_ust_ring_buffer_ctx __ctx; \
\
__event_len = lttng_ust__event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \
LTTNG_UST__TP_ARGS_DATA_VAR(_args)); \
__event_align = lttng_ust__event_get_align__##_provider##___##_name(LTTNG_UST__TP_ARGS_VAR(_args)); \
lttng_ust_ring_buffer_ctx_init(&__ctx, __event_recorder, __event_len, __event_align, \
&__probe_ctx); \
__ret = __chan->ops->event_reserve(&__ctx); \
if (__ret < 0) \
return; \
_fields \
__chan->ops->event_commit(&__ctx); \
break; \
} \
case LTTNG_UST_EVENT_TYPE_NOTIFIER: \