-#include <lttng.h>
-
/*
- * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to
- * strcpy().
+ * lttng-events.h
+ *
+ * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org>
+ * Copyright (C) 2009-2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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
*/
-#undef tp_assign
-#define tp_assign(dest, src) \
- lib_ring_buffer_align_ctx(config, &ctx, sizeof(src)); \
- lib_ring_buffer_write(config, &ctx, &src, sizeof(src));
-#undef tp_memcpy
-#define tp_memcpy(dest, src, len) \
- lib_ring_buffer_align_ctx(config, &ctx, sizeof(*(src))); \
- lib_ring_buffer_write(config, &ctx, &src, len);
-
-/* TODO */
-#undef tp_strcpy
-#define tp_strcpy(dest, src) __assign_str(dest, src)
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+#include <linux/rculist.h>
+#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 "../lttng-events.h"
+#include "../lttng-tracer-core.h"
/*
- * Stage 1 of the trace events.
- *
- * Create event field type metadata section.
+ * Macro declarations used for all stages.
*/
/*
- * DECLARE_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 DEFINE_EVENT and that
- * will map the DECLARE_EVENT_CLASS to the tracepoint.
- *
- * TRACE_EVENT is a one to one mapping between tracepoint and template.
+ * LTTng name mapping macros. LTTng remaps some of the kernel events to
+ * enforce name-spacing.
*/
-#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));
-
-/* Named field types must be defined in lttng-types.h */
-
-/* TODO turn into a structure definition ? */
+#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, fields) \
+ LTTNG_TRACEPOINT_EVENT_CLASS_CODE(map, \
+ PARAMS(proto), \
+ PARAMS(args), \
+ PARAMS(_locvar), \
+ PARAMS(_code), \
+ PARAMS(fields)) \
+ 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, fields) \
+ LTTNG_TRACEPOINT_EVENT_CODE_MAP(name, name, \
+ PARAMS(proto), \
+ PARAMS(args), \
+ PARAMS(_locvar), \
+ PARAMS(_code), \
+ PARAMS(fields))
-#undef __field
-#define __field(_type, _item) #_type " " #_item ";\n"
-
-#undef __field_ext
-#define __field_ext(_type, _item, _filter_type) #_type " " #_item ";\n"
+/*
+ * 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 __array
-#define __array(_type, _item, _len) \
- "type { parent = array; length = " #_len "; elem_type = " #_type "; } " #_item";\n"
+#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 __dynamic_array
-#define __dynamic_array(_type, _item, _len) \
- "type { parent = sequence; length_type = u32; elem_type = " #_type "; } " #_item ";\n"
+#undef LTTNG_TRACEPOINT_EVENT_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_NOARGS(name, fields) \
+ LTTNG_TRACEPOINT_EVENT_MAP_NOARGS(name, name, PARAMS(fields))
-#undef __string
-#define __string(_item, _src) \
- "type { parent = string; encoding = UTF8; } " #_item ";\n"
+#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 TP_PROTO
-#define TP_PROTO(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 TP_ARGS
-#define TP_ARGS(args...)
+#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 TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args /* Only one used in this phase */
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_NOARGS(_name, _fields) \
+ LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, , , PARAMS(_fields))
-#undef TP_fast_assign
-#define TP_fast_assign(args...)
-#undef TP_printk
-#define TP_printk(args...)
+/*
+ * 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.
+ */
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
- tstruct
+/* Reset all macros within TRACEPOINT_EVENT */
+#include "lttng-events-reset.h"
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, name, proto, args)
+#undef TP_PROTO
+#define TP_PROTO(...) __VA_ARGS__
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+#undef TP_ARGS
+#define TP_ARGS(...) __VA_ARGS__
-/* 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)) \
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(_template, _name, _map, _proto, _args) \
+void trace_##_name(_proto);
-#undef DEFINE_TRACE_EVENT_METADATA
-#define DEFINE_TRACE_EVENT_METADATA \
- const char trace_event_metadata_##TRACE_SYSTEM[]
+#undef LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP_NOARGS(_template, _name, _map) \
+void trace_##_name(void *__data);
-//static DEFINE_TRACE_EVENT_METADATA =
-static const char blah[] =
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-;
-
-#if 0
/*
* Stage 2 of the trace events.
*
- * Create static inline function that calculates event size.
+ * 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, _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, __BYTE_ORDER, 10, _encoding), \
+ .length = _length, \
+ } \
+ } \
+ }, \
+ .nowrite = _nowrite, \
+ .user = _user, \
+ },
+
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, \
+ _length_type, _src_length, _encoding, \
+ _base, _user, _nowrite) \
+ { \
+ .name = #_item, \
+ .type = \
+ { \
+ .atype = atype_sequence, \
+ .u = \
+ { \
+ .sequence = \
+ { \
+ .length_type = __type_integer(_length_type, __BYTE_ORDER, 10, none), \
+ .elem_type = __type_integer(_type, __BYTE_ORDER, _base, _encoding), \
+ }, \
+ }, \
+ }, \
+ .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, _fields) \
+ 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, _fields) \
+ LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, PARAMS(_fields))
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/*
* Stage 3 of the trace events.
*
- * Create the probe function : call even size calculation and write event data
- * into the buffer.
+ * Create probe callback prototypes.
*/
+/* Reset all macros within TRACEPOINT_EVENT */
+#include "lttng-events-reset.h"
+#undef TP_PROTO
+#define TP_PROTO(...) __VA_ARGS__
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \
+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, _fields) \
+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.
+ */
-#include <linux/ftrace_event.h>
+/* 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_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
+ _src_length, _encoding, _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++;
/*
- * DECLARE_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 DEFINE_EVENT and that
- * will map the DECLARE_EVENT_CLASS to the tracepoint.
- *
- * TRACE_EVENT is a one to one mapping between tracepoint and template.
+ * ctf_user_string includes \0. If returns 0, it faulted, so we set size to
+ * 1 (\0 only).
*/
-#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));
-
-
-#undef __field
-#define __field(type, item) type item;
-
-#undef __field_ext
-#define __field_ext(type, item, filter_type) type item;
-
-#undef __array
-#define __array(type, item, len) type item[len];
-
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) u32 __data_loc_##item;
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)
-
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
- struct ftrace_raw_##name { \
- struct trace_entry ent; \
- tstruct \
- char __data[0]; \
- }; \
- \
- static struct ftrace_event_class event_class_##name;
-
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, name, proto, args) \
- static struct ftrace_event_call __used \
- __attribute__((__aligned__(4))) event_##name
-
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
-
-/* Callbacks are meaningless to ftrace. */
-#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)) \
+#undef _ctf_string
+#define _ctf_string(_item, _src, _user, _nowrite) \
+ if (_user) \
+ __event_len += __dynamic_len[__dynamic_len_idx++] = \
+ strlen(_src) + 1; \
+ else \
+ __event_len += __dynamic_len[__dynamic_len_idx++] = \
+ max_t(size_t, lttng_strlen_user_inatomic(_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, _fields) \
+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, _fields) \
+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 2 of the trace events.
+ * Stage 4.1 of tracepoint event generation.
*
- * Create static inline function that calculates event size.
+ * Create static inline function that layout the filter stack data.
+ * We make both write and nowrite data available to the filter.
*/
-#undef __field
-#define __field(type, item)
+/* 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 __field_ext
-#define __field_ext(type, item, filter_type)
+#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_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
+ _src_length, _encoding, _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_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 __array
-#define __array(type, item, len)
+#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, _fields) \
+static inline \
+void __event_prepare_filter_stack__##_name(char *__stack_data, \
+ void *__tp_locvar) \
+{ \
+ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
+ \
+ _fields \
+}
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) u32 item;
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, _proto, _args, _locvar, _code, _fields) \
+static inline \
+void __event_prepare_filter_stack__##_name(char *__stack_data, \
+ void *__tp_locvar, _proto) \
+{ \
+ struct { _locvar } *tp_locvar __attribute__((unused)) = __tp_locvar; \
+ \
+ _fields \
+}
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
- struct ftrace_data_offsets_##call { \
- tstruct; \
- };
+/*
+ * 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 DEFINE_EVENT
-#define DEFINE_EVENT(template, name, proto, args)
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
+ _src_length, _encoding, _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 DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+#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, _fields) \
+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, _fields) \
+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 3 of the trace events.
+ * Stage 6 of tracepoint event generation.
*
- * Create the probe function : call even size calculation and write event data
- * into the buffer.
+ * Create the probe function. This function calls event size calculation
+ * and writes event data into the buffer.
*/
-#undef __entry
-#define __entry field
-
-#undef TP_printk
-#define TP_printk(fmt, args...) fmt "\n", args
-
-#undef __get_dynamic_array
-#define __get_dynamic_array(field) \
- ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
-
-#undef __get_str
-#define __get_str(field) (char *)__get_dynamic_array(field)
-
-#undef __print_flags
-#define __print_flags(flag, delim, flag_array...) \
- ({ \
- static const struct trace_print_flags __flags[] = \
- { flag_array, { -1, NULL }}; \
- ftrace_print_flags_seq(p, delim, flag, __flags); \
- })
-
-#undef __print_symbolic
-#define __print_symbolic(value, symbol_array...) \
- ({ \
- static const struct trace_print_flags symbols[] = \
- { symbol_array, { -1, NULL }}; \
- ftrace_print_symbols_seq(p, value, symbols); \
- })
-
-#undef __print_hex
-#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
-static notrace enum print_line_t \
-ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
- struct trace_event *trace_event) \
-{ \
- struct ftrace_event_call *event; \
- struct trace_seq *s = &iter->seq; \
- struct ftrace_raw_##call *field; \
- struct trace_entry *entry; \
- struct trace_seq *p = &iter->tmp_seq; \
- int ret; \
- \
- event = container_of(trace_event, struct ftrace_event_call, \
- event); \
- \
- entry = iter->ent; \
- \
- if (entry->type != event->event.type) { \
- WARN_ON_ONCE(1); \
- return TRACE_TYPE_UNHANDLED; \
- } \
- \
- field = (typeof(field))entry; \
- \
- trace_seq_init(p); \
- ret = trace_seq_printf(s, "%s: ", event->name); \
- if (ret) \
- ret = trace_seq_printf(s, print); \
- if (!ret) \
- return TRACE_TYPE_PARTIAL_LINE; \
- \
- return TRACE_TYPE_HANDLED; \
-} \
-static struct trace_event_functions ftrace_event_type_funcs_##call = { \
- .trace = ftrace_raw_output_##call, \
-};
+/* 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 DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
-static notrace enum print_line_t \
-ftrace_raw_output_##call(struct trace_iterator *iter, int flags, \
- struct trace_event *event) \
-{ \
- struct trace_seq *s = &iter->seq; \
- struct ftrace_raw_##template *field; \
- struct trace_entry *entry; \
- struct trace_seq *p = &iter->tmp_seq; \
- int ret; \
- \
- entry = iter->ent; \
- \
- if (entry->type != event_##call.event.type) { \
- WARN_ON_ONCE(1); \
- return TRACE_TYPE_UNHANDLED; \
+#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)); \
+ }
+
+#undef _ctf_sequence_encoded
+#define _ctf_sequence_encoded(_type, _item, _src, _length_type, \
+ _src_length, _encoding, _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));\
} \
- \
- field = (typeof(field))entry; \
- \
- trace_seq_init(p); \
- ret = trace_seq_printf(s, "%s: ", #call); \
- if (ret) \
- ret = trace_seq_printf(s, print); \
- if (!ret) \
- return TRACE_TYPE_PARTIAL_LINE; \
- \
- return TRACE_TYPE_HANDLED; \
-} \
-static struct trace_event_functions ftrace_event_type_funcs_##call = { \
- .trace = ftrace_raw_output_##call, \
-};
+ 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)); \
+ }
+
+#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++]
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+#undef TP_PROTO
+#define TP_PROTO(...) __VA_ARGS__
-#undef __field_ext
-#define __field_ext(type, item, filter_type) \
- ret = trace_define_field(event_call, #type, #item, \
- offsetof(typeof(field), item), \
- sizeof(field.item), \
- is_signed_type(type), filter_type); \
- if (ret) \
- return ret;
-
-#undef __field
-#define __field(type, item) __field_ext(type, item, FILTER_OTHER)
-
-#undef __array
-#define __array(type, item, len) \
- BUILD_BUG_ON(len > MAX_FILTER_STR_VAL); \
- ret = trace_define_field(event_call, #type "[" #len "]", #item, \
- offsetof(typeof(field), item), \
- sizeof(field.item), \
- is_signed_type(type), FILTER_OTHER); \
- if (ret) \
- return ret;
-
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) \
- ret = trace_define_field(event_call, "__data_loc " #type "[]", #item, \
- offsetof(typeof(field), __data_loc_##item), \
- sizeof(field.__data_loc_##item), \
- is_signed_type(type), FILTER_OTHER);
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1)
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \
-static int notrace \
-ftrace_define_fields_##call(struct ftrace_event_call *event_call) \
-{ \
- struct ftrace_raw_##call field; \
- int ret; \
- \
- tstruct; \
- \
- return ret; \
-}
+#undef TP_ARGS
+#define TP_ARGS(...) __VA_ARGS__
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, name, proto, args)
+#undef TP_FIELDS
+#define TP_FIELDS(...) __VA_ARGS__
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+#undef TP_locvar
+#define TP_locvar(...) __VA_ARGS__
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+#undef TP_code
+#define TP_code(...) __VA_ARGS__
/*
- * remember the offset of each array from the beginning of the event.
+ * 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 */
-#undef __entry
-#define __entry entry
-
-#undef __field
-#define __field(type, item)
-
-#undef __field_ext
-#define __field_ext(type, item, filter_type)
-
-#undef __array
-#define __array(type, item, len)
-
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) \
- __data_offsets->item = __data_size + \
- offsetof(typeof(*entry), __data); \
- __data_offsets->item |= (len * sizeof(type)) << 16; \
- __data_size += (len) * sizeof(type);
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, strlen(src) + 1)
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
-static inline notrace int ftrace_get_offsets_##call( \
- struct ftrace_data_offsets_##call *__data_offsets, proto) \
-{ \
- int __data_size = 0; \
- struct ftrace_raw_##call __maybe_unused *entry; \
- \
- tstruct; \
- \
- return __data_size; \
+/*
+ * 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, _fields) \
+static void __event_probe__##_name(void *__data, _proto) \
+{ \
+ struct probe_local_vars { _locvar }; \
+ struct lttng_event *__event = __data; \
+ 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 = rcu_dereference(__session->pid_tracker); \
+ if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \
+ return; \
+ _code \
+ 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); \
+ list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
+ if (unlikely(bc_runtime->filter(bc_runtime, \
+ __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \
+ __filter_record = 1; \
+ } \
+ if (likely(!__filter_record)) \
+ return; \
+ } \
+ __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, __event, __event_len, \
+ __event_align, -1); \
+ __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
+ if (__ret < 0) \
+ return; \
+ _fields \
+ __chan->ops->event_commit(&__ctx); \
}
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, name, proto, args)
-
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+#undef LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS
+#define LTTNG_TRACEPOINT_EVENT_CLASS_CODE_NOARGS(_name, _locvar, _code, _fields) \
+static void __event_probe__##_name(void *__data) \
+{ \
+ struct probe_local_vars { _locvar }; \
+ struct lttng_event *__event = __data; \
+ 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 = rcu_dereference(__session->pid_tracker); \
+ if (__lpf && likely(!lttng_pid_tracker_lookup(__lpf, current->pid))) \
+ return; \
+ _code \
+ 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); \
+ list_for_each_entry_rcu(bc_runtime, &__event->bytecode_runtime_head, node) { \
+ if (unlikely(bc_runtime->filter(bc_runtime, \
+ __stackvar.__filter_stack_data) & LTTNG_FILTER_RECORD_FLAG)) \
+ __filter_record = 1; \
+ } \
+ if (likely(!__filter_record)) \
+ return; \
+ } \
+ __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, __event, __event_len, \
+ __event_align, -1); \
+ __ret = __chan->ops->event_reserve(&__ctx, __event->id); \
+ if (__ret < 0) \
+ return; \
+ _fields \
+ __chan->ops->event_commit(&__ctx); \
+}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+#undef __get_dynamic_len
+
/*
- * Stage 4 of the trace events.
- *
- * Override the macros in <trace/trace_events.h> to include the following:
- *
- * For those macros defined with TRACE_EVENT:
- *
- * static struct ftrace_event_call event_<call>;
- *
- * static void ftrace_raw_event_<call>(void *__data, proto)
- * {
- * struct ftrace_event_call *event_call = __data;
- * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
- * struct ring_buffer_event *event;
- * struct ftrace_raw_<call> *entry; <-- defined in stage 1
- * struct ring_buffer *buffer;
- * unsigned long irq_flags;
- * int __data_size;
- * int pc;
- *
- * local_save_flags(irq_flags);
- * pc = preempt_count();
- *
- * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
- *
- * event = trace_current_buffer_lock_reserve(&buffer,
- * event_<call>->event.type,
- * sizeof(*entry) + __data_size,
- * irq_flags, pc);
- * if (!event)
- * return;
- * entry = ring_buffer_event_data(event);
- *
- * { <assign>; } <-- Here we assign the entries by the __field and
- * __array macros.
- *
- * if (!filter_current_check_discard(buffer, event_call, entry, event))
- * trace_current_buffer_unlock_commit(buffer,
- * event, irq_flags, pc);
- * }
- *
- * static struct trace_event ftrace_event_type_<call> = {
- * .trace = ftrace_raw_output_<call>, <-- stage 2
- * };
- *
- * static const char print_fmt_<call>[] = <TP_printk>;
- *
- * static struct ftrace_event_class __used event_class_<template> = {
- * .system = "<system>",
- * .define_fields = ftrace_define_fields_<call>,
- * .fields = LIST_HEAD_INIT(event_class_##call.fields),
- * .raw_init = trace_event_raw_init,
- * .probe = ftrace_raw_event_##call,
- * .reg = ftrace_event_reg,
- * };
- *
- * static struct ftrace_event_call __used
- * __attribute__((__aligned__(4)))
- * __attribute__((section("_ftrace_events"))) event_<call> = {
- * .name = "<call>",
- * .class = event_class_<template>,
- * .event = &ftrace_event_type_<call>,
- * .print_fmt = print_fmt_<call>,
- * };
+ * Stage 7 of the trace events.
*
+ * Create event descriptions.
*/
-#ifdef CONFIG_PERF_EVENTS
-
-#define _TRACE_PERF_PROTO(call, proto) \
- static notrace void \
- perf_trace_##call(void *__data, proto);
-
-#define _TRACE_PERF_INIT(call) \
- .perf_probe = perf_trace_##call,
-
-#else
-#define _TRACE_PERF_PROTO(call, proto)
-#define _TRACE_PERF_INIT(call)
-#endif /* CONFIG_PERF_EVENTS */
-
-#undef __entry
-#define __entry entry
-
-#undef __field
-#define __field(type, item)
-
-#undef __array
-#define __array(type, item, len)
-
-#undef __dynamic_array
-#define __dynamic_array(type, item, len) \
- __entry->__data_loc_##item = __data_offsets.item;
-
-#undef __string
-#define __string(item, src) __dynamic_array(char, item, -1) \
-
-#undef __assign_str
-#define __assign_str(dst, src) \
- strcpy(__get_str(dst), src);
-
-#undef TP_fast_assign
-#define TP_fast_assign(args...) args
-
-#undef TP_perf_assign
-#define TP_perf_assign(args...)
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
- \
-static notrace void \
-ftrace_raw_event_##call(void *__data, proto) \
-{ \
- struct ftrace_event_call *event_call = __data; \
- struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
- struct ring_buffer_event *event; \
- struct ftrace_raw_##call *entry; \
- struct ring_buffer *buffer; \
- unsigned long irq_flags; \
- int __data_size; \
- int pc; \
- \
- local_save_flags(irq_flags); \
- pc = preempt_count(); \
- \
- __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
- \
- event = trace_current_buffer_lock_reserve(&buffer, \
- event_call->event.type, \
- sizeof(*entry) + __data_size, \
- irq_flags, pc); \
- if (!event) \
- return; \
- entry = ring_buffer_event_data(event); \
- \
- tstruct \
- \
- { assign; } \
- \
- if (!filter_current_check_discard(buffer, event_call, entry, event)) \
- trace_nowake_buffer_unlock_commit(buffer, \
- event, irq_flags, pc); \
-}
-/*
- * The ftrace_test_probe is compiled out, it is only here as a build time check
- * to make sure that if the tracepoint handling changes, the ftrace probe will
- * fail to compile unless it too is updated.
- */
+/* Named field types must be defined in lttng-types.h */
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, call, proto, args) \
-static inline void ftrace_test_probe_##call(void) \
-{ \
- check_trace_callback_type_##call(ftrace_raw_event_##template); \
-}
+#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 DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print)
+#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)
-#undef __entry
-#define __entry REC
-
-#undef __print_flags
-#undef __print_symbolic
-#undef __get_dynamic_array
-#undef __get_str
-
-#undef TP_printk
-#define TP_printk(fmt, args...) "\"" fmt "\", " __stringify(args)
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
-_TRACE_PERF_PROTO(call, PARAMS(proto)); \
-static const char print_fmt_##call[] = print; \
-static struct ftrace_event_class __used event_class_##call = { \
- .system = __stringify(TRACE_SYSTEM), \
- .define_fields = ftrace_define_fields_##call, \
- .fields = LIST_HEAD_INIT(event_class_##call.fields),\
- .raw_init = trace_event_raw_init, \
- .probe = ftrace_raw_event_##call, \
- .reg = ftrace_event_reg, \
- _TRACE_PERF_INIT(call) \
-};
+/*
+ * Stage 8 of the trace events.
+ *
+ * Create an array of event description pointers.
+ */
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, call, proto, args) \
- \
-static struct ftrace_event_call __used \
-__attribute__((__aligned__(4))) \
-__attribute__((section("_ftrace_events"))) event_##call = { \
- .name = #call, \
- .class = &event_class_##template, \
- .event.funcs = &ftrace_event_type_funcs_##template, \
- .print_fmt = print_fmt_##template, \
-};
+#include "lttng-events-reset.h" /* Reset all macros within LTTNG_TRACEPOINT_EVENT */
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \
- \
-static const char print_fmt_##call[] = print; \
- \
-static struct ftrace_event_call __used \
-__attribute__((__aligned__(4))) \
-__attribute__((section("_ftrace_events"))) event_##call = { \
- .name = #call, \
- .class = &event_class_##template, \
- .event.funcs = &ftrace_event_type_funcs_##call, \
- .print_fmt = print_fmt_##call, \
-}
+#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
/*
- * Define the insertion callback to perf events
- *
- * The job is very similar to ftrace_raw_event_<call> except that we don't
- * insert in the ring buffer but in a perf counter.
- *
- * static void ftrace_perf_<call>(proto)
- * {
- * struct ftrace_data_offsets_<call> __maybe_unused __data_offsets;
- * struct ftrace_event_call *event_call = &event_<call>;
- * extern void perf_tp_event(int, u64, u64, void *, int);
- * struct ftrace_raw_##call *entry;
- * struct perf_trace_buf *trace_buf;
- * u64 __addr = 0, __count = 1;
- * unsigned long irq_flags;
- * struct trace_entry *ent;
- * int __entry_size;
- * int __data_size;
- * int __cpu
- * int pc;
- *
- * pc = preempt_count();
- *
- * __data_size = ftrace_get_offsets_<call>(&__data_offsets, args);
- *
- * // Below we want to get the aligned size by taking into account
- * // the u32 field that will later store the buffer size
- * __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),
- * sizeof(u64));
- * __entry_size -= sizeof(u32);
- *
- * // Protect the non nmi buffer
- * // This also protects the rcu read side
- * local_irq_save(irq_flags);
- * __cpu = smp_processor_id();
- *
- * if (in_nmi())
- * trace_buf = rcu_dereference_sched(perf_trace_buf_nmi);
- * else
- * trace_buf = rcu_dereference_sched(perf_trace_buf);
- *
- * if (!trace_buf)
- * goto end;
- *
- * trace_buf = per_cpu_ptr(trace_buf, __cpu);
- *
- * // Avoid recursion from perf that could mess up the buffer
- * if (trace_buf->recursion++)
- * goto end_recursion;
- *
- * raw_data = trace_buf->buf;
- *
- * // Make recursion update visible before entering perf_tp_event
- * // so that we protect from perf recursions.
- *
- * barrier();
+ * Stage 9 of the trace events.
*
- * //zero dead bytes from alignment to avoid stack leak to userspace:
- * *(u64 *)(&raw_data[__entry_size - sizeof(u64)]) = 0ULL;
- * entry = (struct ftrace_raw_<call> *)raw_data;
- * ent = &entry->ent;
- * tracing_generic_entry_update(ent, irq_flags, pc);
- * ent->type = event_call->id;
- *
- * <tstruct> <- do some jobs with dynamic arrays
- *
- * <assign> <- affect our values
- *
- * perf_tp_event(event_call->id, __addr, __count, entry,
- * __entry_size); <- submit them to perf counter
- *
- * }
+ * Create a toplevel descriptor for the whole probe.
*/
-#ifdef CONFIG_PERF_EVENTS
-
-#undef __entry
-#define __entry entry
-
-#undef __get_dynamic_array
-#define __get_dynamic_array(field) \
- ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
-
-#undef __get_str
-#define __get_str(field) (char *)__get_dynamic_array(field)
-
-#undef __perf_addr
-#define __perf_addr(a) __addr = (a)
-
-#undef __perf_count
-#define __perf_count(c) __count = (c)
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
-static notrace void \
-perf_trace_##call(void *__data, proto) \
-{ \
- struct ftrace_event_call *event_call = __data; \
- struct ftrace_data_offsets_##call __maybe_unused __data_offsets;\
- struct ftrace_raw_##call *entry; \
- struct pt_regs __regs; \
- u64 __addr = 0, __count = 1; \
- struct hlist_head *head; \
- int __entry_size; \
- int __data_size; \
- int rctx; \
- \
- perf_fetch_caller_regs(&__regs); \
- \
- __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \
- __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
- sizeof(u64)); \
- __entry_size -= sizeof(u32); \
- \
- if (WARN_ONCE(__entry_size > PERF_MAX_TRACE_SIZE, \
- "profile buffer not large enough")) \
- return; \
- \
- entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \
- __entry_size, event_call->event.type, &__regs, &rctx); \
- if (!entry) \
- return; \
- \
- tstruct \
- \
- { assign; } \
- \
- head = this_cpu_ptr(event_call->perf_events); \
- perf_trace_buf_submit(entry, __entry_size, rctx, __addr, \
- __count, &__regs, head); \
-}
+#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
/*
- * This part is compiled out, it is only here as a build time check
- * to make sure that if the tracepoint handling changes, the
- * perf probe will fail to compile unless it too is updated.
+ * Stage 10 of the trace events.
+ *
+ * Register/unregister probes at module load/unload.
*/
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(template, call, proto, args) \
-static inline void perf_test_probe_##call(void) \
-{ \
- check_trace_callback_type_##call(perf_trace_##template); \
+
+#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
-#undef DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+#endif
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-#endif /* CONFIG_PERF_EVENTS */
+#undef module_init_eval
+#undef module_exit_eval
+#undef TP_ID1
+#undef TP_ID
-#undef _TRACE_PROFILE_INIT
-#endif //0
+#undef TP_PROTO
+#undef TP_ARGS
projects / lttng-modules.git / blobdiff