From: Mathieu Desnoyers Date: Tue, 15 Mar 2016 14:57:39 +0000 (-0400) Subject: Rename probes/lttng-events.h to probes/lttng-tracepoint-event-impl.h X-Git-Tag: v2.8.0-rc1~17 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=451e462fd569ebb0cdd07c60cec11dc184f44feb;p=lttng-modules.git Rename probes/lttng-events.h to probes/lttng-tracepoint-event-impl.h Ensure we don't have a duplicated header file name in the tree. Signed-off-by: Mathieu Desnoyers --- diff --git a/probes/define_trace.h b/probes/define_trace.h index 98bd9f8b..423d4083 100644 --- a/probes/define_trace.h +++ b/probes/define_trace.h @@ -97,7 +97,7 @@ #define DECLARE_TRACE(name, proto, args) #ifdef LTTNG_PACKAGE_BUILD -#include "lttng-events.h" +#include "lttng-tracepoint-event-impl.h" #endif #undef LTTNG_TRACEPOINT_EVENT diff --git a/probes/lttng-events.h b/probes/lttng-events.h deleted file mode 100644 index ac56dd1f..00000000 --- a/probes/lttng-events.h +++ /dev/null @@ -1,1154 +0,0 @@ -/* - * lttng-events.h - * - * Copyright (C) 2009 Steven Rostedt - * Copyright (C) 2009-2014 Mathieu Desnoyers - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; only - * version 2.1 of the License. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include -#include -#include -#include -#include "lttng.h" -#include "lttng-types.h" -#include "lttng-probe-user.h" -#include "../wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */ -#include "../wrapper/ringbuffer/frontend_types.h" -#include "../wrapper/rcu.h" -#include "../lttng-events.h" -#include "../lttng-tracer-core.h" - -/* - * 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 "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 "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 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 "lttng-events-reset.h" -#include "lttng-events-write.h" -#include "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, _user, _nowrite) \ - { \ - .name = #_item, \ - .type = \ - { \ - .atype = atype_array, \ - .u = \ - { \ - .array = \ - { \ - .elem_type = __type_integer(_type, 0, 0, 0, __BYTE_ORDER, 10, _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, \ - .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, \ - .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 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) - -#include TRACE_INCLUDE(TRACE_INCLUDE_FILE) - -/* - * Stage 3 of the trace events. - * - * Create probe callback prototypes. - */ - -/* Reset all macros within TRACEPOINT_EVENT */ -#include "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 "lttng-events-reset.h" -#include "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, _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, _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)); \ - __dynamic_len[__dynamic_len_idx] = (_src_length); \ - __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ - __dynamic_len_idx++; - -#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 (_user) \ - __event_len += __dynamic_len[__dynamic_len_idx++] = \ - max_t(size_t, lttng_strlen_user_inatomic(_src), 1); \ - else \ - __event_len += __dynamic_len[__dynamic_len_idx++] = \ - strlen(_src) + 1; - -#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 size_t __event_get_size__##_name(size_t *__dynamic_len, \ - 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; \ -} - -#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_size__##_name(size_t *__dynamic_len, \ - 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; \ -} - -#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 "lttng-events-reset.h" -#include "lttng-events-write.h" -#include "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) }; \ - __ctf_tmp_int64 = (int64_t) __tmp.v; \ - break; \ - } \ - case 4: \ - { \ - union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \ - __ctf_tmp_int64 = (int64_t) __tmp.v; \ - break; \ - } \ - case 8: \ - { \ - union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \ - __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) }; \ - __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ - break; \ - } \ - case 4: \ - { \ - union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \ - __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ - break; \ - } \ - case 8: \ - { \ - union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \ - __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) \ -{ \ - __typeof__(_user_src) _src; \ - if (get_user(_src, &(_user_src))) \ - _src = 0; \ - _ctf_integer_ext_fetched(_type, _item, _src, _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, _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, _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); \ - memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ - __stack_data += sizeof(void *); \ - } - -#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 "lttng-events-reset.h" -#include "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, _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, _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 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 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 "lttng-events-reset.h" -#include "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) \ -{ \ - __typeof__(_user_src) _src; \ - if (get_user(_src, &(_user_src))) \ - _src = 0; \ - _ctf_integer_ext_fetched(_type, _item, _src, _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, _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 = __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)); \ - 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 = __stackvar.__dynamic_len[__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 = __stackvar.__dynamic_len[__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) \ - lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ - if (_user) { \ - __chan->ops->event_strcpy_from_user(&__ctx, _src, \ - __get_dynamic_len(dest)); \ - } else { \ - __chan->ops->event_strcpy(&__ctx, _src, \ - __get_dynamic_len(dest)); \ - } - -/* 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_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; \ - size_t __event_len, __event_align; \ - size_t __dynamic_len_idx __attribute__((unused)) = 0; \ - union { \ - size_t __dynamic_len[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(!ACCESS_ONCE(__session->active))) \ - return; \ - if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ - return; \ - if (unlikely(!ACCESS_ONCE(__event->enabled))) \ - return; \ - __lpf = lttng_rcu_dereference(__session->pid_tracker); \ - if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ - return; \ - _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(__stackvar.__dynamic_len, \ - tp_locvar, _args); \ - __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 \ - 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; \ - size_t __event_len, __event_align; \ - size_t __dynamic_len_idx __attribute__((unused)) = 0; \ - union { \ - size_t __dynamic_len[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(!ACCESS_ONCE(__session->active))) \ - return; \ - if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ - return; \ - if (unlikely(!ACCESS_ONCE(__event->enabled))) \ - return; \ - __lpf = lttng_rcu_dereference(__session->pid_tracker); \ - if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ - return; \ - _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(__stackvar.__dynamic_len, tp_locvar); \ - __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 \ - 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 "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 "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 "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_all(); - 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 diff --git a/probes/lttng-tracepoint-event-impl.h b/probes/lttng-tracepoint-event-impl.h new file mode 100644 index 00000000..a2b87a3b --- /dev/null +++ b/probes/lttng-tracepoint-event-impl.h @@ -0,0 +1,1154 @@ +/* + * lttng-tracepoint-event-impl.h + * + * Copyright (C) 2009 Steven Rostedt + * Copyright (C) 2009-2014 Mathieu Desnoyers + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; only + * version 2.1 of the License. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include "lttng.h" +#include "lttng-types.h" +#include "lttng-probe-user.h" +#include "../wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */ +#include "../wrapper/ringbuffer/frontend_types.h" +#include "../wrapper/rcu.h" +#include "../lttng-events.h" +#include "../lttng-tracer-core.h" + +/* + * 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 "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 "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 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 "lttng-events-reset.h" +#include "lttng-events-write.h" +#include "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, _user, _nowrite) \ + { \ + .name = #_item, \ + .type = \ + { \ + .atype = atype_array, \ + .u = \ + { \ + .array = \ + { \ + .elem_type = __type_integer(_type, 0, 0, 0, __BYTE_ORDER, 10, _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, \ + .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, \ + .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 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) + +#include TRACE_INCLUDE(TRACE_INCLUDE_FILE) + +/* + * Stage 3 of the trace events. + * + * Create probe callback prototypes. + */ + +/* Reset all macros within TRACEPOINT_EVENT */ +#include "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 "lttng-events-reset.h" +#include "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, _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, _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)); \ + __dynamic_len[__dynamic_len_idx] = (_src_length); \ + __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ + __dynamic_len_idx++; + +#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 (_user) \ + __event_len += __dynamic_len[__dynamic_len_idx++] = \ + max_t(size_t, lttng_strlen_user_inatomic(_src), 1); \ + else \ + __event_len += __dynamic_len[__dynamic_len_idx++] = \ + strlen(_src) + 1; + +#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 size_t __event_get_size__##_name(size_t *__dynamic_len, \ + 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; \ +} + +#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_size__##_name(size_t *__dynamic_len, \ + 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; \ +} + +#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 "lttng-events-reset.h" +#include "lttng-events-write.h" +#include "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) }; \ + __ctf_tmp_int64 = (int64_t) __tmp.v; \ + break; \ + } \ + case 4: \ + { \ + union { _type t; int32_t v; } __tmp = { (_type) (_src) }; \ + __ctf_tmp_int64 = (int64_t) __tmp.v; \ + break; \ + } \ + case 8: \ + { \ + union { _type t; int64_t v; } __tmp = { (_type) (_src) }; \ + __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) }; \ + __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ + break; \ + } \ + case 4: \ + { \ + union { _type t; uint32_t v; } __tmp = { (_type) (_src) }; \ + __ctf_tmp_uint64 = (uint64_t) __tmp.v; \ + break; \ + } \ + case 8: \ + { \ + union { _type t; uint64_t v; } __tmp = { (_type) (_src) }; \ + __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) \ +{ \ + __typeof__(_user_src) _src; \ + if (get_user(_src, &(_user_src))) \ + _src = 0; \ + _ctf_integer_ext_fetched(_type, _item, _src, _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, _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, _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); \ + memcpy(__stack_data, &__ctf_tmp_ptr, sizeof(void *)); \ + __stack_data += sizeof(void *); \ + } + +#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 "lttng-events-reset.h" +#include "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, _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, _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 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 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 "lttng-events-reset.h" +#include "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) \ +{ \ + __typeof__(_user_src) _src; \ + if (get_user(_src, &(_user_src))) \ + _src = 0; \ + _ctf_integer_ext_fetched(_type, _item, _src, _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, _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 = __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)); \ + 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 = __stackvar.__dynamic_len[__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 = __stackvar.__dynamic_len[__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) \ + lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(*(_src))); \ + if (_user) { \ + __chan->ops->event_strcpy_from_user(&__ctx, _src, \ + __get_dynamic_len(dest)); \ + } else { \ + __chan->ops->event_strcpy(&__ctx, _src, \ + __get_dynamic_len(dest)); \ + } + +/* 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_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; \ + size_t __event_len, __event_align; \ + size_t __dynamic_len_idx __attribute__((unused)) = 0; \ + union { \ + size_t __dynamic_len[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(!ACCESS_ONCE(__session->active))) \ + return; \ + if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ + return; \ + if (unlikely(!ACCESS_ONCE(__event->enabled))) \ + return; \ + __lpf = lttng_rcu_dereference(__session->pid_tracker); \ + if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ + return; \ + _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(__stackvar.__dynamic_len, \ + tp_locvar, _args); \ + __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 \ + 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; \ + size_t __event_len, __event_align; \ + size_t __dynamic_len_idx __attribute__((unused)) = 0; \ + union { \ + size_t __dynamic_len[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(!ACCESS_ONCE(__session->active))) \ + return; \ + if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ + return; \ + if (unlikely(!ACCESS_ONCE(__event->enabled))) \ + return; \ + __lpf = lttng_rcu_dereference(__session->pid_tracker); \ + if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \ + return; \ + _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(__stackvar.__dynamic_len, tp_locvar); \ + __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 \ + 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 "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 "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 "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_all(); + 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