X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=probes%2Flttng-events.h;h=596b706085847037d71298c42f7b059b92939da9;hb=refs%2Fheads%2Fstable-2.5;hp=5ee61bc612472bb49e5e8b12915da50a319e96b1;hpb=d793d5e111fe1436fb8e15daa5d7fb1be8987bb4;p=lttng-modules.git diff --git a/probes/lttng-events.h b/probes/lttng-events.h index 5ee61bc6..596b7060 100644 --- a/probes/lttng-events.h +++ b/probes/lttng-events.h @@ -1,15 +1,79 @@ +/* + * lttng-events.h + * + * Copyright (C) 2009 Steven Rostedt + * Copyright (C) 2009-2012 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 "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 "../ltt-events.h" -#include "../ltt-tracer-core.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 TRACE_EVENT_MAP +#define TRACE_EVENT_MAP(name, map, proto, args, tstruct, assign, print) \ + DECLARE_EVENT_CLASS(map, \ + PARAMS(proto), \ + PARAMS(args), \ + PARAMS(tstruct), \ + PARAMS(assign), \ + PARAMS(print)) \ + DEFINE_EVENT_MAP(map, name, map, PARAMS(proto), PARAMS(args)) + +#undef TRACE_EVENT_MAP_NOARGS +#define TRACE_EVENT_MAP_NOARGS(name, map, tstruct, assign, print) \ + DECLARE_EVENT_CLASS_NOARGS(map, \ + PARAMS(tstruct), \ + PARAMS(assign), \ + PARAMS(print)) \ + DEFINE_EVENT_MAP_NOARGS(map, name, map) + +#undef DEFINE_EVENT_PRINT_MAP +#define DEFINE_EVENT_PRINT_MAP(template, name, map, proto, args, print) \ + DEFINE_EVENT_MAP(template, name, map, PARAMS(proto), PARAMS(args)) + +/* Callbacks are meaningless to LTTng. */ +#undef TRACE_EVENT_FN_MAP +#define TRACE_EVENT_FN_MAP(name, map, proto, args, tstruct, \ + assign, print, reg, unreg) \ + TRACE_EVENT_MAP(name, map, PARAMS(proto), PARAMS(args), \ + PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ + +#undef TRACE_EVENT_CONDITION_MAP +#define TRACE_EVENT_CONDITION_MAP(name, map, proto, args, cond, tstruct, assign, print) \ + TRACE_EVENT_MAP(name, map, \ + PARAMS(proto), \ + PARAMS(args), \ + PARAMS(tstruct), \ + PARAMS(assign), \ + PARAMS(print)) + /* * DECLARE_EVENT_CLASS can be used to add a generic function * handlers for events. That is, if all events have the same @@ -21,25 +85,50 @@ */ #undef TRACE_EVENT -#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ - DECLARE_EVENT_CLASS(name, \ - PARAMS(proto), \ - PARAMS(args), \ - PARAMS(tstruct), \ - PARAMS(assign), \ - PARAMS(print)) \ - DEFINE_EVENT(name, name, PARAMS(proto), PARAMS(args)) +#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \ + TRACE_EVENT_MAP(name, name, \ + PARAMS(proto), \ + PARAMS(args), \ + PARAMS(tstruct), \ + PARAMS(assign), \ + PARAMS(print)) + +#undef TRACE_EVENT_NOARGS +#define TRACE_EVENT_NOARGS(name, tstruct, assign, print) \ + TRACE_EVENT_MAP_NOARGS(name, name, \ + PARAMS(tstruct), \ + PARAMS(assign), \ + PARAMS(print)) #undef DEFINE_EVENT_PRINT #define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ - DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) + DEFINE_EVENT_PRINT_MAP(template, name, name, \ + PARAMS(proto), PARAMS(args), PARAMS(print_)) -/* Callbacks are meaningless to LTTng. */ #undef TRACE_EVENT_FN #define TRACE_EVENT_FN(name, proto, args, tstruct, \ assign, print, reg, unreg) \ - TRACE_EVENT(name, PARAMS(proto), PARAMS(args), \ - PARAMS(tstruct), PARAMS(assign), PARAMS(print)) \ + TRACE_EVENT_FN_MAP(name, name, PARAMS(proto), PARAMS(args), \ + PARAMS(tstruct), PARAMS(assign), PARAMS(print), \ + PARAMS(reg), PARAMS(unreg)) \ + +#undef DEFINE_EVENT +#define DEFINE_EVENT(template, name, proto, args) \ + DEFINE_EVENT_MAP(template, name, name, PARAMS(proto), PARAMS(args)) + +#undef DEFINE_EVENT_NOARGS +#define DEFINE_EVENT_NOARGS(template, name) \ + DEFINE_EVENT_MAP_NOARGS(template, name, name) + +#undef TRACE_EVENT_CONDITION +#define TRACE_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \ + TRACE_EVENT_CONDITION_MAP(name, name, \ + PARAMS(proto), \ + PARAMS(args), \ + PARAMS(cond), \ + PARAMS(tstruct), \ + PARAMS(assign), \ + PARAMS(print)) /* * Stage 1 of the trace events. @@ -57,10 +146,14 @@ #undef TP_ARGS #define TP_ARGS(args...) args -#undef DEFINE_EVENT -#define DEFINE_EVENT(_template, _name, _proto, _args) \ +#undef DEFINE_EVENT_MAP +#define DEFINE_EVENT_MAP(_template, _name, _map, _proto, _args) \ void trace_##_name(_proto); +#undef DEFINE_EVENT_MAP_NOARGS +#define DEFINE_EVENT_MAP_NOARGS(_template, _name, _map) \ +void trace_##_name(void *__data); + #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* @@ -74,25 +167,39 @@ void trace_##_name(_proto); /* Named field types must be defined in lttng-types.h */ -#undef __field -#define __field(_type, _item) \ +#undef __field_full +#define __field_full(_type, _item, _order, _base) \ { \ .name = #_item, \ - .type = __type_integer(_type, __BYTE_ORDER), \ + .type = __type_integer(_type, _order, _base, none), \ }, +#undef __field +#define __field(_type, _item) \ + __field_full(_type, _item, __BYTE_ORDER, 10) + #undef __field_ext -#define __field_ext(_type, _item, _filter_type) __field(_type, _item) +#define __field_ext(_type, _item, _filter_type) \ + __field(_type, _item) + +#undef __field_hex +#define __field_hex(_type, _item) \ + __field_full(_type, _item, __BYTE_ORDER, 16) + +#undef __field_oct +#define __field_oct(_type, _item) \ + __field_full(_type, _item, __BYTE_ORDER, 8) #undef __field_network #define __field_network(_type, _item) \ - { \ - .name = #_item, \ - .type = __type_integer(_type, __BIG_ENDIAN), \ - }, + __field_full(_type, _item, __BIG_ENDIAN, 10) -#undef __array -#define __array(_type, _item, _length) \ +#undef __field_network_hex +#define __field_network_hex(_type, _item) \ + __field_full(_type, _item, __BIG_ENDIAN, 16) + +#undef __array_enc_ext +#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ { \ .name = #_item, \ .type = \ @@ -101,13 +208,25 @@ void trace_##_name(_proto); .u.array = \ { \ .length = _length, \ - .elem_type = __type_integer(_type, __BYTE_ORDER), \ + .elem_type = __type_integer(_type, _order, _base, _encoding), \ }, \ }, \ }, -#undef __dynamic_array -#define __dynamic_array(_type, _item, _length) \ +#undef __array +#define __array(_type, _item, _length) \ + __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, none) + +#undef __array_text +#define __array_text(_type, _item, _length) \ + __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, UTF8) + +#undef __array_hex +#define __array_hex(_type, _item, _length) \ + __array_enc_ext(_type, _item, _length, __BYTE_ORDER, 16, none) + +#undef __dynamic_array_enc_ext +#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ { \ .name = #_item, \ .type = \ @@ -115,12 +234,32 @@ void trace_##_name(_proto); .atype = atype_sequence, \ .u.sequence = \ { \ - .length_type = __type_integer(u32, __BYTE_ORDER), \ - .elem_type = __type_integer(_type, __BYTE_ORDER), \ + .length_type = __type_integer(u32, __BYTE_ORDER, 10, none), \ + .elem_type = __type_integer(_type, _order, _base, _encoding), \ }, \ }, \ }, +#undef __dynamic_array_enc_ext_2 +#define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding) \ + __dynamic_array_enc_ext(_type, _item, _length1 + _length2, _order, _base, _encoding) + +#undef __dynamic_array +#define __dynamic_array(_type, _item, _length) \ + __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, none) + +#undef __dynamic_array_text +#define __dynamic_array_text(_type, _item, _length) \ + __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 10, UTF8) + +#undef __dynamic_array_hex +#define __dynamic_array_hex(_type, _item, _length) \ + __dynamic_array_enc_ext(_type, _item, _length, __BYTE_ORDER, 16, none) + +#undef __dynamic_array_text_2 +#define __dynamic_array_text_2(_type, _item, _length1, _length2) \ + __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, __BYTE_ORDER, 10, UTF8) + #undef __string #define __string(_item, _src) \ { \ @@ -132,18 +271,25 @@ void trace_##_name(_proto); }, \ }, +#undef __string_from_user +#define __string_from_user(_item, _src) \ + __string(_item, _src) + #undef TP_STRUCT__entry #define TP_STRUCT__entry(args...) args /* Only one used in this phase */ -#undef DECLARE_EVENT_CLASS -#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ +#undef DECLARE_EVENT_CLASS_NOARGS +#define DECLARE_EVENT_CLASS_NOARGS(_name, _tstruct, _assign, _print) \ static const struct lttng_event_field __event_fields___##_name[] = { \ _tstruct \ }; -#include TRACE_INCLUDE(TRACE_INCLUDE_FILE) +#undef DECLARE_EVENT_CLASS +#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ + DECLARE_EVENT_CLASS_NOARGS(_name, PARAMS(_tstruct), PARAMS(_assign), \ + PARAMS(_print)) -#undef __type_integer +#include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* * Stage 3 of the trace events. @@ -160,31 +306,66 @@ void trace_##_name(_proto); #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ static void __event_probe__##_name(void *__data, _proto); +#undef DECLARE_EVENT_CLASS_NOARGS +#define DECLARE_EVENT_CLASS_NOARGS(_name, _tstruct, _assign, _print) \ +static void __event_probe__##_name(void *__data); + #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) +/* + * Stage 3.9 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 TRACE_EVENT */ + +#ifndef TP_PROBE_CB +#define TP_PROBE_CB(_template) &__event_probe__##_template +#endif + +#undef DEFINE_EVENT_MAP_NOARGS +#define DEFINE_EVENT_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 DEFINE_EVENT_MAP +#define DEFINE_EVENT_MAP(_template, _name, _map, _proto, _args) \ + DEFINE_EVENT_MAP_NOARGS(_template, _name, _map) + +#include TRACE_INCLUDE(TRACE_INCLUDE_FILE) + + /* * Stage 4 of the trace events. * - * Create an array of events. + * Create an array of event description pointers. */ /* Named field types must be defined in lttng-types.h */ #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ -#undef DEFINE_EVENT -#define DEFINE_EVENT(_template, _name, _proto, _args) \ - { \ - .fields = __event_fields___##_template, \ - .name = #_name, \ - .probe_callback = (void *) &__event_probe__##_template,\ - .nr_fields = ARRAY_SIZE(__event_fields___##_template), \ - }, +#undef DEFINE_EVENT_MAP_NOARGS +#define DEFINE_EVENT_MAP_NOARGS(_template, _name, _map) \ + &__event_desc___##_map, + +#undef DEFINE_EVENT_MAP +#define DEFINE_EVENT_MAP(_template, _name, _map, _proto, _args) \ + DEFINE_EVENT_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)[] = { +static const struct lttng_event_desc *TP_ID(__event_desc___, TRACE_SYSTEM)[] = { #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) }; @@ -202,7 +383,7 @@ static const struct lttng_event_desc TP_ID(__event_desc___, TRACE_SYSTEM)[] = { #define TP_ID(_token, _system) TP_ID1(_token, _system) /* non-const because list head will be modified when registered. */ -static struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { +static __used struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { .event_desc = TP_ID(__event_desc___, TRACE_SYSTEM), .nr_events = ARRAY_SIZE(TP_ID(__event_desc___, TRACE_SYSTEM)), }; @@ -220,30 +401,50 @@ static struct lttng_probe_desc TP_ID(__probe_desc___, TRACE_SYSTEM) = { /* Named field types must be defined in lttng-types.h */ -#undef __field -#define __field(_type, _item) \ - __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ +#undef __field_full +#define __field_full(_type, _item, _order, _base) \ + __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ __event_len += sizeof(_type); -#undef __field_ext -#define __field_ext(_type, _item, _filter_type) __field(_type, _item) - -#undef __array -#define __array(_type, _item, _length) \ - __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ +#undef __array_enc_ext +#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ + __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ __event_len += sizeof(_type) * (_length); -#undef __dynamic_array -#define __dynamic_array(_type, _item, _length) \ - __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(u32)); \ +#undef __dynamic_array_enc_ext +#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ + __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(u32)); \ __event_len += sizeof(u32); \ - __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \ - __event_len += sizeof(_type) * (_length); + __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ + __dynamic_len[__dynamic_len_idx] = (_length); \ + __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ + __dynamic_len_idx++; + +#undef __dynamic_array_enc_ext_2 +#define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\ + __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(u32)); \ + __event_len += sizeof(u32); \ + __event_len += lib_ring_buffer_align(__event_len, lttng_alignof(_type)); \ + __dynamic_len[__dynamic_len_idx] = (_length1); \ + __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ + __dynamic_len_idx++; \ + __dynamic_len[__dynamic_len_idx] = (_length2); \ + __event_len += sizeof(_type) * __dynamic_len[__dynamic_len_idx]; \ + __dynamic_len_idx++; #undef __string #define __string(_item, _src) \ __event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1; +/* + * strlen_user includes \0. If returns 0, it faulted, so we set size to + * 1 (\0 only). + */ +#undef __string_from_user +#define __string_from_user(_item, _src) \ + __event_len += __dynamic_len[__dynamic_len_idx++] = \ + max_t(size_t, lttng_strlen_user_inatomic(_src), 1); + #undef TP_PROTO #define TP_PROTO(args...) args @@ -275,25 +476,29 @@ static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \ /* Named field types must be defined in lttng-types.h */ -#undef __field -#define __field(_type, _item) \ - __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); +#undef __field_full +#define __field_full(_type, _item, _order, _base) \ + __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); -#undef __field_ext -#define __field_ext(_type, _item, _filter_type) __field(_type, _item) +#undef __array_enc_ext +#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ + __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); -#undef __array -#define __array(_type, _item, _length) \ - __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); +#undef __dynamic_array_enc_ext +#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ + __event_align = max_t(size_t, __event_align, lttng_alignof(u32)); \ + __event_align = max_t(size_t, __event_align, lttng_alignof(_type)); -#undef __dynamic_array -#define __dynamic_array(_type, _item, _length) \ - __event_align = max_t(size_t, __event_align, ltt_alignof(u32)); \ - __event_align = max_t(size_t, __event_align, ltt_alignof(_type)); +#undef __dynamic_array_enc_ext_2 +#define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\ + __dynamic_array_enc_ext(_type, _item, _length1 + _length2, _order, _base, _encoding) #undef __string #define __string(_item, _src) +#undef __string_from_user +#define __string_from_user(_item, _src) + #undef TP_PROTO #define TP_PROTO(args...) args @@ -323,20 +528,27 @@ static inline size_t __event_get_align__##_name(_proto) \ /* Named field types must be defined in lttng-types.h */ -#undef __field -#define __field(_type, _item) _type _item; +#undef __field_full +#define __field_full(_type, _item, _order, _base) _type _item; -#undef __field_ext -#define __field_ext(_type, _item, _filter_type) __field(_type, _item) +#undef __array_enc_ext +#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \ + _type _item; -#undef __array -#define __array(_type, _item, _length) _type _item; +#undef __dynamic_array_enc_ext +#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ + _type _item; -#undef __dynamic_array -#define __dynamic_array(_type, _item, _length) _type _item; +#undef __dynamic_array_enc_ext_2 +#define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\ + __dynamic_array_enc_ext(_type, _item, _length1 + _length2, _order, _base, _encoding) #undef __string -#define __string(_item, _src) char _item; +#define __string(_item, _src) char _item; + +#undef __string_from_user +#define __string_from_user(_item, _src) \ + __string(_item, _src) #undef TP_STRUCT__entry #define TP_STRUCT__entry(args...) args @@ -363,31 +575,41 @@ struct __event_typemap__##_name { \ #include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */ -#undef __field -#define __field(_type, _item) \ +#undef __field_full +#define __field_full(_type, _item, _order, _base) \ goto __assign_##_item; \ __end_field_##_item: -#undef __field_ext -#define __field_ext(_type, _item, _filter_type) __field(_type, _item) - -#undef __array -#define __array(_type, _item, _length) \ +#undef __array_enc_ext +#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ goto __assign_##_item; \ __end_field_##_item: -#undef __dynamic_array -#define __dynamic_array(_type, _item, _length) \ +#undef __dynamic_array_enc_ext +#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\ goto __assign_##_item##_1; \ __end_field_##_item##_1: \ goto __assign_##_item##_2; \ __end_field_##_item##_2: +#undef __dynamic_array_enc_ext_2 +#define __dynamic_array_enc_ext_2(_type, _item, _length1, _length2, _order, _base, _encoding)\ + goto __assign_##_item##_1; \ +__end_field_##_item##_1: \ + goto __assign_##_item##_2; \ +__end_field_##_item##_2: \ + goto __assign_##_item##_3; \ +__end_field_##_item##_3: + #undef __string #define __string(_item, _src) \ goto __assign_##_item; \ __end_field_##_item: +#undef __string_from_user +#define __string_from_user(_item, _src) \ + __string(_item, _src) + /* * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to * strcpy(). @@ -397,37 +619,98 @@ __end_field_##_item: __assign_##dest: \ { \ __typeof__(__typemap.dest) __tmp = (src); \ - lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__tmp)); \ - __chan->ops->event_write(&ctx, &__tmp, sizeof(__tmp)); \ + lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__tmp)); \ + __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\ } \ goto __end_field_##dest; -#undef tp_memcpy -#define tp_memcpy(dest, src, len) \ +/* fixed length array memcpy */ +#undef tp_memcpy_gen +#define tp_memcpy_gen(write_ops, dest, src, len) \ __assign_##dest: \ if (0) \ (void) __typemap.dest; \ - lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__typemap.dest)); \ - __chan->ops->event_write(&ctx, src, len); \ + lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \ + __chan->ops->write_ops(&__ctx, src, len); \ goto __end_field_##dest; -#undef tp_memcpy_dyn -#define tp_memcpy_dyn(dest, src, len) \ +#undef tp_memcpy +#define tp_memcpy(dest, src, len) \ + tp_memcpy_gen(event_write, dest, src, len) + +#undef tp_memcpy_from_user +#define tp_memcpy_from_user(dest, src, len) \ + tp_memcpy_gen(event_write_from_user, dest, src, len) + +/* variable length sequence memcpy */ +#undef tp_memcpy_dyn_gen +#define tp_memcpy_dyn_gen(write_ops, dest, src) \ __assign_##dest##_1: \ { \ - u32 __tmpl = (len); \ - lib_ring_buffer_align_ctx(&ctx, ltt_alignof(u32)); \ - __chan->ops->event_write(&ctx, &__tmpl, sizeof(u32)); \ + u32 __tmpl = __dynamic_len[__dynamic_len_idx]; \ + lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(u32)); \ + __chan->ops->event_write(&__ctx, &__tmpl, sizeof(u32)); \ } \ goto __end_field_##dest##_1; \ __assign_##dest##_2: \ - lib_ring_buffer_align_ctx(&ctx, ltt_alignof(__typemap.dest)); \ - __chan->ops->event_write(&ctx, src, len); \ + lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \ + __chan->ops->write_ops(&__ctx, src, \ + sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\ goto __end_field_##dest##_2; +#undef tp_memcpy_dyn_gen_2 +#define tp_memcpy_dyn_gen_2(write_ops, dest, src1, src2) \ +__assign_##dest##_1: \ + { \ + u32 __tmpl = __dynamic_len[__dynamic_len_idx] \ + + __dynamic_len[__dynamic_len_idx + 1]; \ + lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(u32)); \ + __chan->ops->event_write(&__ctx, &__tmpl, sizeof(u32)); \ + } \ + goto __end_field_##dest##_1; \ +__assign_##dest##_2: \ + lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \ + __chan->ops->write_ops(&__ctx, src1, \ + sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\ + goto __end_field_##dest##_2; \ +__assign_##dest##_3: \ + __chan->ops->write_ops(&__ctx, src2, \ + sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\ + goto __end_field_##dest##_3; + +#undef tp_memcpy_dyn +#define tp_memcpy_dyn(dest, src) \ + tp_memcpy_dyn_gen(event_write, dest, src) + +#undef tp_memcpy_dyn_2 +#define tp_memcpy_dyn_2(dest, src1, src2) \ + tp_memcpy_dyn_gen_2(event_write, dest, src1, src2) + +#undef tp_memcpy_dyn_from_user +#define tp_memcpy_dyn_from_user(dest, src) \ + tp_memcpy_dyn_gen(event_write_from_user, dest, src) + +/* + * The string length including the final \0. + */ +#undef tp_copy_string_from_user +#define tp_copy_string_from_user(dest, src) \ +__assign_##dest: \ + if (0) \ + (void) __typemap.dest; \ + lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \ + __chan->ops->event_strcpy_from_user(&__ctx, src, \ + __get_dynamic_array_len(dest)); \ + goto __end_field_##dest; + #undef tp_strcpy #define tp_strcpy(dest, src) \ - tp_memcpy(dest, src, __get_dynamic_array_len(dest)) +__assign_##dest: \ + if (0) \ + (void) __typemap.dest; \ + lib_ring_buffer_align_ctx(&__ctx, lttng_alignof(__typemap.dest)); \ + __chan->ops->event_strcpy(&__ctx, src, __get_dynamic_array_len(dest)); \ + goto __end_field_##dest; /* Named field types must be defined in lttng-types.h */ @@ -453,33 +736,90 @@ __assign_##dest##_2: \ #undef TP_fast_assign #define TP_fast_assign(args...) 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 */ + +/* + * __dynamic_len array length is twice the number of fields due to + * __dynamic_array_enc_ext_2() and tp_memcpy_dyn_2(), which are the + * worse case, needing 2 entries per field. + */ #undef DECLARE_EVENT_CLASS #define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \ static void __event_probe__##_name(void *__data, _proto) \ { \ - struct ltt_event *__event = __data; \ - struct ltt_channel *__chan = __event->chan; \ - struct lib_ring_buffer_ctx ctx; \ + struct lttng_event *__event = __data; \ + struct lttng_channel *__chan = __event->chan; \ + struct lib_ring_buffer_ctx __ctx; \ size_t __event_len, __event_align; \ size_t __dynamic_len_idx = 0; \ - size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \ + size_t __dynamic_len[2 * ARRAY_SIZE(__event_fields___##_name)]; \ struct __event_typemap__##_name __typemap; \ int __ret; \ \ - if (0) \ + if (0) { \ (void) __dynamic_len_idx; /* don't warn if unused */ \ - if (!ACCESS_ONCE(__chan->session->active)) \ + (void) __typemap; /* don't warn if unused */ \ + } \ + if (!_TP_SESSION_CHECK(session, __chan->session)) \ + return; \ + if (unlikely(!ACCESS_ONCE(__chan->session->active))) \ + return; \ + if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ + return; \ + if (unlikely(!ACCESS_ONCE(__event->enabled))) \ return; \ __event_len = __event_get_size__##_name(__dynamic_len, _args); \ __event_align = __event_get_align__##_name(_args); \ - lib_ring_buffer_ctx_init(&ctx, __chan->chan, NULL, __event_len, \ + lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ + __event_align, -1); \ + __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ + if (__ret < 0) \ + return; \ + /* Control code (field ordering) */ \ + _tstruct \ + __chan->ops->event_commit(&__ctx); \ + return; \ + /* Copy code, steered by control code */ \ + _assign \ +} + +#undef DECLARE_EVENT_CLASS_NOARGS +#define DECLARE_EVENT_CLASS_NOARGS(_name, _tstruct, _assign, _print) \ +static void __event_probe__##_name(void *__data) \ +{ \ + struct lttng_event *__event = __data; \ + struct lttng_channel *__chan = __event->chan; \ + struct lib_ring_buffer_ctx __ctx; \ + size_t __event_len, __event_align; \ + int __ret; \ + \ + if (!_TP_SESSION_CHECK(session, __chan->session)) \ + return; \ + if (unlikely(!ACCESS_ONCE(__chan->session->active))) \ + return; \ + if (unlikely(!ACCESS_ONCE(__chan->enabled))) \ + return; \ + if (unlikely(!ACCESS_ONCE(__event->enabled))) \ + return; \ + __event_len = 0; \ + __event_align = 1; \ + lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \ __event_align, -1); \ - __ret = __chan->ops->event_reserve(&ctx); \ + __ret = __chan->ops->event_reserve(&__ctx, __event->id); \ if (__ret < 0) \ return; \ /* Control code (field ordering) */ \ _tstruct \ - __chan->ops->event_commit(&ctx); \ + __chan->ops->event_commit(&__ctx); \ return; \ /* Copy code, steered by control code */ \ _assign \ @@ -502,22 +842,30 @@ static void __event_probe__##_name(void *__data, _proto) \ #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 ltt_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM)); + return lttng_probe_register(&TP_ID(__probe_desc___, TRACE_SYSTEM)); } -module_init_eval(__lttng_events_init__, TRACE_SYSTEM); - static void TP_ID(__lttng_events_exit__, TRACE_SYSTEM)(void) { - ltt_probe_unregister(&TP_ID(__probe_desc___, TRACE_SYSTEM)); + 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 +#undef TRACE_EVENT_FLAGS