/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) * * lttng-tracepoint-event-impl.h * * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org> * Copyright (C) 2009-2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> */ #include <linux/uaccess.h> #include <linux/debugfs.h> #include <linux/rculist.h> #include <asm/byteorder.h> #include <linux/swab.h> #include <probes/lttng.h> #include <probes/lttng-types.h> #include <probes/lttng-probe-user.h> #include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_mappings() */ #include <wrapper/ringbuffer/frontend_types.h> #include <wrapper/ringbuffer/backend.h> #include <wrapper/rcu.h> #include <lttng-events.h> #include <lttng-tracer-core.h> #include <lttng-tp-mempool.h> #define __LTTNG_NULL_STRING "(null)" /* * Macro declarations used for all stages. */ /* * LTTng name mapping macros. LTTng remaps some of the kernel events to * enforce name-spacing. */ #undef LTTNG_TRACEPOINT_EVENT_MAP #define LTTNG_TRACEPOINT_EVENT_MAP(name, map, proto, args, fields) \ LTTNG_TRACEPOINT_EVENT_CLASS(map, \ PARAMS(proto), \ PARAMS(args), \ PARAMS(fields)) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) #undef LTTNG_TRACEPOINT_EVENT_MAP_NOARGS #define LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, map, fields) \ LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(map, \ PARAMS(fields)) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(map, name, map) #undef LTTNG_TRACEPOINT_EVENT_CODE_MAP #define LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, map, proto, args, _locvar, _code_pre, fields, _code_post) \ LTTNG_TRACEPOINT_EVENT_CLASS_CODE(map, \ PARAMS(proto), \ PARAMS(args), \ PARAMS(_locvar), \ PARAMS(_code_pre), \ PARAMS(fields), \ PARAMS(_code_post)) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) #undef LTTNG_TRACEPOINT_EVENT_CODE #define LTTNG_TRACEPOINT_EVENT_CODE(name, proto, args, _locvar, _code_pre, fields, _code_post) \ LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, name, \ PARAMS(proto), \ PARAMS(args), \ PARAMS(_locvar), \ PARAMS(_code_pre), \ PARAMS(fields), \ PARAMS(_code_post)) /* * LTTNG_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 LTTNG_TRACEPOINT_EVENT_INSTANCE and that will map the * LTTNG_TRACEPOINT_EVENT_CLASS to the tracepoint. * * LTTNG_TRACEPOINT_EVENT is a one to one mapping between tracepoint and * template. */ #undef LTTNG_TRACEPOINT_EVENT #define LTTNG_TRACEPOINT_EVENT(name, proto, args, fields) \ LTTNG_TRACEPOINT_EVENT_MAP(name, name, \ PARAMS(proto), \ PARAMS(args), \ PARAMS(fields)) #undef LTTNG_TRACEPOINT_EVENT_NOARGS #define LTTNG_TRACEPOINT_EVENT_NOARGS(name, fields) \ LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, name, PARAMS(fields)) #undef LTTNG_TRACEPOINT_EVENT_INSTANCE #define LTTNG_TRACEPOINT_EVENT_INSTANCE(template, name, proto, args) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(template, name, name, PARAMS(proto), PARAMS(args)) #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS #define LTTNG_TRACEPOINT_EVENT_INSTANCE_NOARGS(template, name) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(template, name, name) #undef LTTNG_TRACEPOINT_EVENT_CLASS #define LTTNG_TRACEPOINT_EVENT_CLASS(_name, _proto, _args, _fields) \ LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(_proto), PARAMS(_args), , , \ PARAMS(_fields), ) #undef LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS #define LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \ LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_fields), ) /* * Stage 1 of the trace events. * * Create dummy trace calls for each events, verifying that the LTTng module * instrumentation headers match the kernel arguments. Will be optimized * out by the compiler. */ /* Reset all macros within TRACEPOINT_EVENT */ #include <probes/lttng-events-reset.h> #undef TP_PROTO #define TP_PROTO(...) __VA_ARGS__ #undef TP_ARGS #define TP_ARGS(...) __VA_ARGS__ #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ void trace_##_name(_proto); #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ void trace_##_name(void); #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* * Stage 1.1 of the trace events. * * 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. */ #include <probes/lttng-events-reset.h> /* Reset all macros within TRACE_EVENT */ #undef TP_PROTO #define TP_PROTO(...) __VA_ARGS__ #undef TP_ARGS #define TP_ARGS(...) __VA_ARGS__ #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ void __event_template_proto___##_template(_proto); #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ void __event_template_proto___##_template(void); #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ void __event_template_proto___##_name(_proto); #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ void __event_template_proto___##_name(void); #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* * Stage 1.2 of tracepoint event generation * * Unfolding the enums */ #include <probes/lttng-events-reset.h> /* Reset all macros within TRACE_EVENT */ /* 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), \ }, /* Enumeration entry (automatic value; follows the rules of CTF) */ #undef ctf_enum_auto #define ctf_enum_auto(_string) \ { \ .start = { \ .signedness = -1, \ .value = -1, \ }, \ .end = { \ .signedness = -1, \ .value = -1, \ }, \ .string = (_string), \ .options = { \ .is_auto = 1, \ } \ }, #undef TP_ENUM_VALUES #define TP_ENUM_VALUES(...) \ __VA_ARGS__ #undef LTTNG_TRACEPOINT_ENUM #define LTTNG_TRACEPOINT_ENUM(_name, _values) \ const struct lttng_enum_entry __enum_values__##_name[] = { \ _values \ }; #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* * Stage 2 of the trace events. * * Create event field type metadata section. * Each event produce an array of fields. */ /* Reset all macros within TRACEPOINT_EVENT */ #include <probes/lttng-events-reset.h> #include <probes/lttng-events-write.h> #include <probes/lttng-events-nowrite.h> #undef _ctf_integer_ext #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ { \ .name = #_item, \ .type = __type_integer(_type, 0, 0, -1, _byte_order, _base, none),\ .nowrite = _nowrite, \ .user = _user, \ }, #undef _ctf_array_encoded #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _byte_order, _base, _user, _nowrite) \ { \ .name = #_item, \ .type = \ { \ .atype = atype_array, \ .u = \ { \ .array = \ { \ .elem_type = __type_integer(_type, 0, 0, 0, _byte_order, _base, _encoding), \ .length = _length, \ } \ } \ }, \ .nowrite = _nowrite, \ .user = _user, \ }, #undef _ctf_array_bitfield #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ { \ .name = #_item, \ .type = \ { \ .atype = atype_array_bitfield, \ .u = \ { \ .array = \ { \ .elem_type = __type_integer(_type, 1, 1, 0, __LITTLE_ENDIAN, 10, none), \ .length = (_length) * sizeof(_type) * CHAR_BIT, \ .elem_alignment = lttng_alignof(_type), \ } \ } \ }, \ .nowrite = _nowrite, \ .user = _user, \ }, #undef _ctf_sequence_encoded #define _ctf_sequence_encoded(_type, _item, _src, \ _length_type, _src_length, _encoding, \ _byte_order, _base, _user, _nowrite) \ { \ .name = #_item, \ .type = \ { \ .atype = atype_sequence, \ .u = \ { \ .sequence = \ { \ .length_type = __type_integer(_length_type, 0, 0, 0, __BYTE_ORDER, 10, none), \ .elem_type = __type_integer(_type, 0, 0, -1, _byte_order, _base, _encoding), \ }, \ }, \ }, \ .nowrite = _nowrite, \ .user = _user, \ }, #undef _ctf_sequence_bitfield #define _ctf_sequence_bitfield(_type, _item, _src, \ _length_type, _src_length, \ _user, _nowrite) \ { \ .name = #_item, \ .type = \ { \ .atype = atype_sequence_bitfield, \ .u = \ { \ .sequence = \ { \ .length_type = __type_integer(_length_type, 0, 0, 0, __BYTE_ORDER, 10, none), \ .elem_type = __type_integer(_type, 1, 1, 0, __LITTLE_ENDIAN, 10, none), \ .elem_alignment = lttng_alignof(_type), \ }, \ }, \ }, \ .nowrite = _nowrite, \ .user = _user, \ }, #undef _ctf_string #define _ctf_string(_item, _src, _user, _nowrite) \ { \ .name = #_item, \ .type = \ { \ .atype = atype_string, \ .u = \ { \ .basic = { .string = { .encoding = lttng_encode_UTF8 } } \ }, \ }, \ .nowrite = _nowrite, \ .user = _user, \ }, #undef _ctf_enum #define _ctf_enum(_name, _type, _item, _src, _user, _nowrite) \ { \ .name = #_item, \ .type = { \ .atype = atype_enum, \ .u = { \ .basic = { \ .enumeration = { \ .desc = &__enum_##_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, \ .user = _user, \ }, #undef ctf_custom_field #define ctf_custom_field(_type, _item, _code) \ { \ .name = #_item, \ .type = { _type }, \ .nowrite = 0, \ .user = 0, \ }, #undef ctf_custom_type #define ctf_custom_type(...) __VA_ARGS__ #undef TP_FIELDS #define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */ #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static const struct lttng_event_field __event_fields___##_name[] = { \ _fields \ }; #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, PARAMS(_fields), _code_post) #undef LTTNG_TRACEPOINT_ENUM #define LTTNG_TRACEPOINT_ENUM(_name, _values) \ static const struct lttng_enum_desc __enum_##_name = { \ .name = #_name, \ .entries = __enum_values__##_name, \ .nr_entries = ARRAY_SIZE(__enum_values__##_name), \ }; #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* * Stage 3 of the trace events. * * Create probe callback prototypes. */ /* Reset all macros within TRACEPOINT_EVENT */ #include <probes/lttng-events-reset.h> #undef TP_PROTO #define TP_PROTO(...) __VA_ARGS__ #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ static void __event_probe__##_name(void *__data, _proto); #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static void __event_probe__##_name(void *__data); #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* * Stage 4 of the trace events. * * Create static inline function that calculates event size. */ /* Reset all macros within TRACEPOINT_EVENT */ #include <probes/lttng-events-reset.h> #include <probes/lttng-events-write.h> #undef _ctf_integer_ext #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _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, _byte_order, _base, _user, _nowrite) \ __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ __event_len += sizeof(_type) * (_length); #undef _ctf_array_bitfield #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ _ctf_array_encoded(_type, _item, _src, _length, none, __LITTLE_ENDIAN, 0, _user, _nowrite) #undef _ctf_sequence_encoded #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ __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)); \ { \ size_t __seqlen = (_src_length); \ \ if (unlikely(++this_cpu_ptr(<tng_dynamic_len_stack)->offset >= LTTNG_DYNAMIC_LEN_STACK_SIZE)) \ goto error; \ barrier(); /* reserve before use. */ \ this_cpu_ptr(<tng_dynamic_len_stack)->stack[this_cpu_ptr(<tng_dynamic_len_stack)->offset - 1] = __seqlen; \ __event_len += sizeof(_type) * __seqlen; \ } #undef _ctf_sequence_bitfield #define _ctf_sequence_bitfield(_type, _item, _src, \ _length_type, _src_length, \ _user, _nowrite) \ _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ none, __LITTLE_ENDIAN, 10, _user, _nowrite) /* * ctf_user_string includes \0. If returns 0, it faulted, so we set size to * 1 (\0 only). */ #undef _ctf_string #define _ctf_string(_item, _src, _user, _nowrite) \ if (unlikely(++this_cpu_ptr(<tng_dynamic_len_stack)->offset >= LTTNG_DYNAMIC_LEN_STACK_SIZE)) \ goto error; \ barrier(); /* reserve before use. */ \ if (_user) { \ __event_len += this_cpu_ptr(<tng_dynamic_len_stack)->stack[this_cpu_ptr(<tng_dynamic_len_stack)->offset - 1] = \ max_t(size_t, lttng_strlen_user_inatomic(_src), 1); \ } else { \ __event_len += this_cpu_ptr(<tng_dynamic_len_stack)->stack[this_cpu_ptr(<tng_dynamic_len_stack)->offset - 1] = \ strlen((_src) ? (_src) : __LTTNG_NULL_STRING) + 1; \ } #undef _ctf_enum #define _ctf_enum(_name, _type, _item, _src, _user, _nowrite) \ _ctf_integer_ext(_type, _item, _src, __BYTE_ORDER, 10, _user, _nowrite) #undef ctf_align #define ctf_align(_type) \ __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); #undef ctf_custom_field #define ctf_custom_field(_type, _item, _code) \ { \ _code \ } #undef ctf_custom_code #define ctf_custom_code(...) __VA_ARGS__ #undef TP_PROTO #define TP_PROTO(...) __VA_ARGS__ #undef TP_FIELDS #define TP_FIELDS(...) __VA_ARGS__ #undef TP_locvar #define TP_locvar(...) __VA_ARGS__ #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ static inline ssize_t __event_get_size__##_name(void *__tp_locvar, _proto) \ { \ size_t __event_len = 0; \ unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ \ _fields \ return __event_len; \ \ error: \ __attribute__((unused)); \ return -1; \ } #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static inline ssize_t __event_get_size__##_name(void *__tp_locvar) \ { \ size_t __event_len = 0; \ unsigned int __dynamic_len_idx __attribute__((unused)) = 0; \ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ \ _fields \ return __event_len; \ \ error: \ __attribute__((unused)); \ return -1; \ } #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* * Stage 4.1 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 <probes/lttng-events-reset.h> #include <probes/lttng-events-write.h> #include <probes/lttng-events-nowrite.h> #undef _ctf_integer_ext_fetched #define _ctf_integer_ext_fetched(_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) \ __swab16s(&__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) \ __swab32s(&__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) \ __swab64s(&__tmp.v); \ __ctf_tmp_int64 = (int64_t) __tmp.v; \ break; \ } \ default: \ BUG_ON(1); \ }; \ 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) \ __swab16s(&__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) \ __swab32s(&__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) \ __swab64s(&__tmp.v); \ __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ break; \ } \ default: \ BUG_ON(1); \ }; \ memcpy(__stack_data, &__ctf_tmp_uint64, sizeof(uint64_t)); \ } \ __stack_data += sizeof(int64_t); #undef _ctf_integer_ext_isuser0 #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) #undef _ctf_integer_ext_isuser1 #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ { \ union { \ char __array[sizeof(_user_src)]; \ __typeof__(_user_src) __v; \ } __tmp_fetch; \ if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \ &(_user_src), sizeof(_user_src))) \ memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \ _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \ } #undef _ctf_integer_ext #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) #undef _ctf_array_encoded #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _byte_order, _base, _user, _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_array_bitfield #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ _ctf_array_encoded(_type, _item, _src, _length, none, __LITTLE_ENDIAN, 0, _user, _nowrite) #undef _ctf_sequence_encoded #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ { \ 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_sequence_bitfield #define _ctf_sequence_bitfield(_type, _item, _src, \ _length_type, _src_length, \ _user, _nowrite) \ _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ none, __LITTLE_ENDIAN, 10, _user, _nowrite) #undef _ctf_string #define _ctf_string(_item, _src, _user, _nowrite) \ { \ const void *__ctf_tmp_ptr = \ ((_src) ? (_src) : __LTTNG_NULL_STRING); \ memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ __stack_data += sizeof(void *); \ } #undef _ctf_enum #define _ctf_enum(_name, _type, _item, _src, _user, _nowrite) \ _ctf_integer_ext(_type, _item, _src, __BYTE_ORDER, 10, _user, _nowrite) #undef TP_PROTO #define TP_PROTO(...) __VA_ARGS__ #undef TP_FIELDS #define TP_FIELDS(...) __VA_ARGS__ #undef TP_locvar #define TP_locvar(...) __VA_ARGS__ #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static inline \ void __event_prepare_filter_stack__##_name(char *__stack_data, \ void *__tp_locvar) \ { \ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ \ _fields \ } #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ static inline \ void __event_prepare_filter_stack__##_name(char *__stack_data, \ void *__tp_locvar, _proto) \ { \ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ \ _fields \ } #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* * Stage 5 of the trace events. * * Create static inline function that calculates event payload alignment. */ /* Reset all macros within TRACEPOINT_EVENT */ #include <probes/lttng-events-reset.h> #include <probes/lttng-events-write.h> #undef _ctf_integer_ext #define _ctf_integer_ext(_type, _item, _src, _byte_order, _base, _user, _nowrite) \ __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); #undef _ctf_array_encoded #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _byte_order, _base, _user, _nowrite) \ __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); #undef _ctf_array_bitfield #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ _ctf_array_encoded(_type, _item, _src, _length, none, __LITTLE_ENDIAN, 0, _user, _nowrite) #undef _ctf_sequence_encoded #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ __event_align = max_t(size_t, __event_align, lttng_alignof(_length_type)); \ __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); #undef _ctf_sequence_bitfield #define _ctf_sequence_bitfield(_type, _item, _src, \ _length_type, _src_length, \ _user, _nowrite) \ _ctf_sequence_encoded(_type, _item, _src, _length_type, _src_length, \ none, __LITTLE_ENDIAN, 10, _user, _nowrite) #undef _ctf_string #define _ctf_string(_item, _src, _user, _nowrite) #undef _ctf_enum #define _ctf_enum(_name, _type, _item, _src, _user, _nowrite) \ _ctf_integer_ext(_type, _item, _src, __BYTE_ORDER, 10, _user, _nowrite) #undef ctf_align #define ctf_align(_type) \ __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); #undef TP_PROTO #define TP_PROTO(...) __VA_ARGS__ #undef TP_FIELDS #define TP_FIELDS(...) __VA_ARGS__ #undef TP_locvar #define TP_locvar(...) __VA_ARGS__ #undef ctf_custom_field #define ctf_custom_field(_type, _item, _code) _code #undef ctf_custom_code #define ctf_custom_code(...) \ { \ __VA_ARGS__ \ } #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \ { \ size_t __event_align = 1; \ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ \ _fields \ return __event_align; \ } #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static inline size_t __event_get_align__##_name(void *__tp_locvar) \ { \ size_t __event_align = 1; \ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \ \ _fields \ return __event_align; \ } #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* * Stage 6 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 <probes/lttng-events-reset.h> #include <probes/lttng-events-write.h> #undef _ctf_integer_ext_fetched #define _ctf_integer_ext_fetched(_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_integer_ext_isuser0 #define _ctf_integer_ext_isuser0(_type, _item, _src, _byte_order, _base, _nowrite) \ _ctf_integer_ext_fetched(_type, _item, _src, _byte_order, _base, _nowrite) #undef _ctf_integer_ext_isuser1 #define _ctf_integer_ext_isuser1(_type, _item, _user_src, _byte_order, _base, _nowrite) \ { \ union { \ char __array[sizeof(_user_src)]; \ __typeof__(_user_src) __v; \ } __tmp_fetch; \ if (lib_ring_buffer_copy_from_user_check_nofault(__tmp_fetch.__array, \ &(_user_src), sizeof(_user_src))) \ memset(__tmp_fetch.__array, 0, sizeof(__tmp_fetch.__array)); \ _ctf_integer_ext_fetched(_type, _item, __tmp_fetch.__v, _byte_order, _base, _nowrite) \ } #undef _ctf_integer_ext #define _ctf_integer_ext(_type, _item, _user_src, _byte_order, _base, _user, _nowrite) \ _ctf_integer_ext_isuser##_user(_type, _item, _user_src, _byte_order, _base, _nowrite) #undef _ctf_array_encoded #define _ctf_array_encoded(_type, _item, _src, _length, _encoding, _byte_order, _base, _user, _nowrite) \ lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ if (_user) { \ __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \ } else { \ __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \ } #if (__BYTE_ORDER == __LITTLE_ENDIAN) #undef _ctf_array_bitfield #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ if (_user) { \ __chan->ops->event_write_from_user(&__ctx, _src, sizeof(_type) * (_length)); \ } else { \ __chan->ops->event_write(&__ctx, _src, sizeof(_type) * (_length)); \ } #else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ /* * For big endian, we need to byteswap into little endian. */ #undef _ctf_array_bitfield #define _ctf_array_bitfield(_type, _item, _src, _length, _user, _nowrite) \ lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); \ { \ size_t _i; \ \ for (_i = 0; _i < (_length); _i++) { \ _type _tmp; \ \ if (_user) { \ if (get_user(_tmp, (_type *) _src + _i)) \ _tmp = 0; \ } else { \ _tmp = ((_type *) _src)[_i]; \ } \ switch (sizeof(_type)) { \ case 1: \ break; \ case 2: \ _tmp = cpu_to_le16(_tmp); \ break; \ case 4: \ _tmp = cpu_to_le32(_tmp); \ break; \ case 8: \ _tmp = cpu_to_le64(_tmp); \ break; \ default: \ BUG_ON(1); \ } \ __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \ } \ } #endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ #undef _ctf_sequence_encoded #define _ctf_sequence_encoded(_type, _item, _src, _length_type, \ _src_length, _encoding, _byte_order, _base, _user, _nowrite) \ { \ _length_type __tmpl = this_cpu_ptr(<tng_dynamic_len_stack)->stack[__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)); \ if (_user) { \ __chan->ops->event_write_from_user(&__ctx, _src, \ sizeof(_type) * __get_dynamic_len(dest)); \ } else { \ __chan->ops->event_write(&__ctx, _src, \ sizeof(_type) * __get_dynamic_len(dest)); \ } #if (__BYTE_ORDER == __LITTLE_ENDIAN) #undef _ctf_sequence_bitfield #define _ctf_sequence_bitfield(_type, _item, _src, \ _length_type, _src_length, \ _user, _nowrite) \ { \ _length_type __tmpl = this_cpu_ptr(<tng_dynamic_len_stack)->stack[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \ 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)); \ if (_user) { \ __chan->ops->event_write_from_user(&__ctx, _src, \ sizeof(_type) * __get_dynamic_len(dest)); \ } else { \ __chan->ops->event_write(&__ctx, _src, \ sizeof(_type) * __get_dynamic_len(dest)); \ } #else /* #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ /* * For big endian, we need to byteswap into little endian. */ #undef _ctf_sequence_bitfield #define _ctf_sequence_bitfield(_type, _item, _src, \ _length_type, _src_length, \ _user, _nowrite) \ { \ _length_type __tmpl = this_cpu_ptr(<tng_dynamic_len_stack)->stack[__dynamic_len_idx] * sizeof(_type) * CHAR_BIT; \ 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)); \ { \ size_t _i, _length; \ \ _length = __get_dynamic_len(dest); \ for (_i = 0; _i < _length; _i++) { \ _type _tmp; \ \ if (_user) { \ if (get_user(_tmp, (_type *) _src + _i)) \ _tmp = 0; \ } else { \ _tmp = ((_type *) _src)[_i]; \ } \ switch (sizeof(_type)) { \ case 1: \ break; \ case 2: \ _tmp = cpu_to_le16(_tmp); \ break; \ case 4: \ _tmp = cpu_to_le32(_tmp); \ break; \ case 8: \ _tmp = cpu_to_le64(_tmp); \ break; \ default: \ BUG_ON(1); \ } \ __chan->ops->event_write(&__ctx, &_tmp, sizeof(_type)); \ } \ } #endif /* #else #if (__BYTE_ORDER == __LITTLE_ENDIAN) */ #undef _ctf_string #define _ctf_string(_item, _src, _user, _nowrite) \ if (_user) { \ lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ __chan->ops->event_strcpy_from_user(&__ctx, _src, \ __get_dynamic_len(dest)); \ } else { \ const char *__ctf_tmp_string = \ ((_src) ? (_src) : __LTTNG_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(_name, _type, _item, _src, _user, _nowrite) \ _ctf_integer_ext(_type, _item, _src, __BYTE_ORDER, 10, _user, _nowrite) #undef ctf_align #define ctf_align(_type) \ lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(_type)); #undef ctf_custom_field #define ctf_custom_field(_type, _item, _code) _code #undef ctf_custom_code #define ctf_custom_code(...) \ { \ __VA_ARGS__ \ } /* Beware: this get len actually consumes the len value */ #undef __get_dynamic_len #define __get_dynamic_len(field) this_cpu_ptr(<tng_dynamic_len_stack)->stack[__dynamic_len_idx++] #undef TP_PROTO #define TP_PROTO(...) __VA_ARGS__ #undef TP_ARGS #define TP_ARGS(...) __VA_ARGS__ #undef TP_FIELDS #define TP_FIELDS(...) __VA_ARGS__ #undef TP_locvar #define TP_locvar(...) __VA_ARGS__ #undef TP_code_pre #define TP_code_pre(...) __VA_ARGS__ #undef TP_code_post #define TP_code_post(...) __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. */ #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 */ /* * 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_TRACEPOINT_EVENT_CLASS_CODE #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code_pre, _fields, _code_post) \ static void __event_probe__##_name(void *__data, _proto) \ { \ struct probe_local_vars { _locvar }; \ struct lttng_event *__event = __data; \ struct lttng_probe_ctx __lttng_probe_ctx = { \ .event = __event, \ .interruptible = !irqs_disabled(), \ }; \ struct lttng_channel *__chan = __event->chan; \ struct lttng_session *__session = __chan->session; \ struct lib_ring_buffer_ctx __ctx; \ ssize_t __event_len; \ size_t __event_align; \ size_t __orig_dynamic_len_offset, __dynamic_len_idx __attribute__((unused)); \ union { \ size_t __dynamic_len_removed[ARRAY_SIZE(__event_fields___##_name)]; \ char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \ } __stackvar; \ int __ret; \ struct probe_local_vars __tp_locvar; \ struct probe_local_vars *tp_locvar __attribute__((unused)) = \ &__tp_locvar; \ struct lttng_pid_tracker *__lpf; \ \ if (!_TP_SESSION_CHECK(session, __session)) \ return; \ if (unlikely(!LTTNG_READ_ONCE(__session->active))) \ return; \ if (unlikely(!LTTNG_READ_ONCE(__chan->enabled))) \ return; \ if (unlikely(!LTTNG_READ_ONCE(__event->enabled))) \ return; \ __lpf = lttng_rcu_dereference(__session->pid_tracker); \ if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->tgid))) \ return; \ __orig_dynamic_len_offset = this_cpu_ptr(<tng_dynamic_len_stack)->offset; \ __dynamic_len_idx = __orig_dynamic_len_offset; \ _code_pre \ if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ struct lttng_bytecode_runtime *bc_runtime; \ int __filter_record = __event->has_enablers_without_bytecode; \ \ __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \ tp_locvar, _args); \ lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \ __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ __filter_record = 1; \ } \ if (likely(!__filter_record)) \ goto __post; \ } \ __event_len = __event_get_size__##_name(tp_locvar, _args); \ if (unlikely(__event_len < 0)) { \ lib_ring_buffer_lost_event_too_big(__chan->chan); \ goto __post; \ } \ __event_align = __event_get_align__##_name(tp_locvar, _args); \ lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \ __event_align, -1); \ __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ if (__ret < 0) \ goto __post; \ _fields \ __chan->ops->event_commit(&__ctx); \ __post: \ _code_post \ barrier(); /* use before un-reserve. */ \ this_cpu_ptr(<tng_dynamic_len_stack)->offset = __orig_dynamic_len_offset; \ return; \ } #undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS #define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code_pre, _fields, _code_post) \ static void __event_probe__##_name(void *__data) \ { \ struct probe_local_vars { _locvar }; \ struct lttng_event *__event = __data; \ struct lttng_probe_ctx __lttng_probe_ctx = { \ .event = __event, \ .interruptible = !irqs_disabled(), \ }; \ struct lttng_channel *__chan = __event->chan; \ struct lttng_session *__session = __chan->session; \ struct lib_ring_buffer_ctx __ctx; \ ssize_t __event_len; \ size_t __event_align; \ size_t __orig_dynamic_len_offset, __dynamic_len_idx __attribute__((unused)); \ union { \ size_t __dynamic_len_removed[ARRAY_SIZE(__event_fields___##_name)]; \ char __filter_stack_data[2 * sizeof(unsigned long) * ARRAY_SIZE(__event_fields___##_name)]; \ } __stackvar; \ int __ret; \ struct probe_local_vars __tp_locvar; \ struct probe_local_vars *tp_locvar __attribute__((unused)) = \ &__tp_locvar; \ struct lttng_pid_tracker *__lpf; \ \ if (!_TP_SESSION_CHECK(session, __session)) \ return; \ if (unlikely(!LTTNG_READ_ONCE(__session->active))) \ return; \ if (unlikely(!LTTNG_READ_ONCE(__chan->enabled))) \ return; \ if (unlikely(!LTTNG_READ_ONCE(__event->enabled))) \ return; \ __lpf = lttng_rcu_dereference(__session->pid_tracker); \ if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->tgid))) \ return; \ __orig_dynamic_len_offset = this_cpu_ptr(<tng_dynamic_len_stack)->offset; \ __dynamic_len_idx = __orig_dynamic_len_offset; \ _code_pre \ if (unlikely(!list_empty(&__event->bytecode_runtime_head))) { \ struct lttng_bytecode_runtime *bc_runtime; \ int __filter_record = __event->has_enablers_without_bytecode; \ \ __event_prepare_filter_stack__##_name(__stackvar.__filter_stack_data, \ tp_locvar); \ lttng_list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \ if (unlikely(bc_runtime->filter(bc_runtime, &__lttng_probe_ctx, \ __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \ __filter_record = 1; \ } \ if (likely(!__filter_record)) \ goto __post; \ } \ __event_len = __event_get_size__##_name(tp_locvar); \ if (unlikely(__event_len < 0)) { \ lib_ring_buffer_lost_event_too_big(__chan->chan); \ goto __post; \ } \ __event_align = __event_get_align__##_name(tp_locvar); \ lib_ring_buffer_ctx_init(&__ctx, __chan->chan, &__lttng_probe_ctx, __event_len, \ __event_align, -1); \ __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ if (__ret < 0) \ goto __post; \ _fields \ __chan->ops->event_commit(&__ctx); \ __post: \ _code_post \ barrier(); /* use before un-reserve. */ \ this_cpu_ptr(<tng_dynamic_len_stack)->offset = __orig_dynamic_len_offset; \ return; \ } #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) #undef __get_dynamic_len /* * Stage 7 of the trace events. * * Create event descriptions. */ /* Named field types must be defined in lttng-types.h */ #include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ #ifndef TP_PROBE_CB #define TP_PROBE_CB(_template) &__event_probe__##_template #endif #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ static const struct lttng_event_desc __event_desc___##_map = { \ .fields = __event_fields___##_template, \ .name = #_map, \ .kname = #_name, \ .probe_callback = (void *) TP_PROBE_CB(_template), \ .nr_fields = ARRAY_SIZE(__event_fields___##_template), \ .owner = THIS_MODULE, \ }; #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* * Stage 8 of the trace events. * * Create an array of event description pointers. */ #include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \ &__event_desc___##_map, #undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP #define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) #define TP_ID1(_token, _system) _token##_system #define TP_ID(_token, _system) TP_ID1(_token, _system) static const struct lttng_event_desc *TP_ID(__event_desc___, TRACE_SYSTEM)[] = { #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) }; #undef TP_ID1 #undef TP_ID /* * Stage 9 of the trace events. * * Create a toplevel descriptor for the whole probe. */ #define TP_ID1(_token, _system) _token##_system #define TP_ID(_token, _system) TP_ID1(_token, _system) /* non-const because list head will be modified when registered. */ static __used struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { .provider = __stringify(TRACE_SYSTEM), .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM), .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)), .head = { NULL, NULL }, .lazy_init_head = { NULL, NULL }, .lazy = 0, }; #undef TP_ID1 #undef TP_ID /* * Stage 10 of the trace events. * * Register/unregister probes at module load/unload. */ #include <probes/lttng-events-reset.h> /* Reset all macros within LTTNG_TRACEPOINT_EVENT */ #define TP_ID1(_token, _system) _token##_system #define TP_ID(_token, _system) TP_ID1(_token, _system) #define module_init_eval1(_token, _system) module_init(_token##_system) #define module_init_eval(_token, _system) module_init_eval1(_token, _system) #define module_exit_eval1(_token, _system) module_exit(_token##_system) #define module_exit_eval(_token, _system) module_exit_eval1(_token, _system) #ifndef TP_MODULE_NOINIT static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void) { wrapper_vmalloc_sync_mappings(); return lttng_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM)); } static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void) { lttng_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM)); } #ifndef TP_MODULE_NOAUTOLOAD module_init_eval(__lttng_events_init__, TRACE_SYSTEM); module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM); #endif #endif #undef module_init_eval #undef module_exit_eval #undef TP_ID1 #undef TP_ID #undef TP_PROTO #undef TP_ARGS