/*
- * Copyright (c) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (c) 2011-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
*
- * Permission is hereby granted to use or copy this program
- * for any purpose, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*/
#include <stdio.h>
_TP_PARAMS(_args), \
_TP_PARAMS(_fields)) \
TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name, \
- _TP_PARAMS(args))
+ _TP_PARAMS(_args))
/* Helpers */
#define _TP_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
},
#undef TP_FIELDS
-#define TP_FIELDS(args...) args /* Only one used in this phase */
+#define TP_FIELDS(...) __VA_ARGS__ /* Only one used in this phase */
#undef TRACEPOINT_EVENT_CLASS
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
#include <lttng/ust-tracepoint-event-reset.h>
#undef TP_ARGS
-#define TP_ARGS(args...) args
+#define TP_ARGS(...) __VA_ARGS__
#undef TRACEPOINT_EVENT_CLASS
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
__event_len += __dynamic_len[__dynamic_len_idx++] = strlen(_src) + 1;
#undef TP_ARGS
-#define TP_ARGS(args...) args
+#define TP_ARGS(...) __VA_ARGS__
#undef TP_FIELDS
-#define TP_FIELDS(args...) args
+#define TP_FIELDS(...) __VA_ARGS__
#undef TRACEPOINT_EVENT_CLASS
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
#include TRACEPOINT_INCLUDE
+/*
+ * Stage 3.1 of tracepoint event generation.
+ *
+ * Create static inline function that layout the filter stack data.
+ */
+
+/* Reset all macros within TRACEPOINT_EVENT */
+#include <lttng/ust-tracepoint-event-reset.h>
+
+#undef ctf_integer_ext
+#define ctf_integer_ext(_type, _item, _src, _byte_order, _base) \
+ if (lttng_is_signed_type(_type)) \
+ *(int64_t *) __stack_data = (int64_t) (_type) (_src); \
+ else \
+ *(uint64_t *) __stack_data = (uint64_t) (_type) (_src); \
+ __stack_data += sizeof(int64_t);
+
+#undef ctf_float
+#define ctf_float(_type, _item, _src) \
+ *(double *) __stack_data = (double) (_type) (_src); \
+ __stack_data += sizeof(double);
+
+#undef ctf_array_encoded
+#define ctf_array_encoded(_type, _item, _src, _length, _encoding) \
+ *(unsigned long *) __stack_data = (unsigned long) (_length); \
+ __stack_data += sizeof(unsigned long); \
+ *(const void **) __stack_data = (_src); \
+ __stack_data += sizeof(void *);
+
+#undef ctf_sequence_encoded
+#define ctf_sequence_encoded(_type, _item, _src, _length_type, \
+ _src_length, _encoding) \
+ *(unsigned long *) __stack_data = (unsigned long) (_src_length); \
+ __stack_data += sizeof(unsigned long); \
+ *(const void **) __stack_data = (_src); \
+ __stack_data += sizeof(void *);
+
+#undef ctf_string
+#define ctf_string(_item, _src) \
+ *(const void **) __stack_data = (_src); \
+ __stack_data += sizeof(void *);
+
+#undef TP_ARGS
+#define TP_ARGS(...) __VA_ARGS__
+
+#undef TP_FIELDS
+#define TP_FIELDS(...) __VA_ARGS__
+
+#undef TRACEPOINT_EVENT_CLASS
+#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+static inline \
+void __event_prepare_filter_stack__##_provider##___##_name(char *__stack_data,\
+ _TP_ARGS_DATA_PROTO(_args)) \
+{ \
+ _fields \
+}
+
+#include TRACEPOINT_INCLUDE
+
+
+
/*
* Stage 4 of tracepoint event generation.
*
#define ctf_string(_item, _src)
#undef TP_ARGS
-#define TP_ARGS(args...) args
+#define TP_ARGS(...) __VA_ARGS__
#undef TP_FIELDS
-#define TP_FIELDS(args...) args
+#define TP_FIELDS(...) __VA_ARGS__
#undef TRACEPOINT_EVENT_CLASS
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
#define ctf_sequence_encoded(_type, _item, _src, _length_type, \
_src_length, _encoding) \
{ \
- _length_type __tmpl = __dynamic_len[__dynamic_len_idx]; \
+ _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));\
} \
/* Beware: this get len actually consumes the len value */
#undef __get_dynamic_len
-#define __get_dynamic_len(field) __dynamic_len[__dynamic_len_idx++]
+#define __get_dynamic_len(field) __stackvar.__dynamic_len[__dynamic_len_idx++]
#undef TP_ARGS
-#define TP_ARGS(args...) args
+#define TP_ARGS(...) __VA_ARGS__
#undef TP_FIELDS
-#define TP_FIELDS(args...) args
+#define TP_FIELDS(...) __VA_ARGS__
+/*
+ * 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.
+ */
#undef TRACEPOINT_EVENT_CLASS
#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
static void __event_probe__##_provider##___##_name(_TP_ARGS_DATA_PROTO(_args))\
struct lttng_ust_lib_ring_buffer_ctx __ctx; \
size_t __event_len, __event_align; \
size_t __dynamic_len_idx = 0; \
- size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \
+ union { \
+ size_t __dynamic_len[_TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \
+ char __filter_stack_data[2 * sizeof(unsigned long) * _TP_ARRAY_SIZE(__event_fields___##_provider##___##_name)]; \
+ } __stackvar; \
int __ret; \
\
if (0) \
return; \
if (caa_unlikely(!CMM_ACCESS_ONCE(__event->enabled))) \
return; \
- __event_len = __event_get_size__##_provider##___##_name(__dynamic_len,\
+ if (caa_unlikely(__event->filter)) { \
+ __event_prepare_filter_stack__##_provider##___##_name(__stackvar.__filter_stack_data, \
+ _TP_ARGS_DATA_VAR(_args)); \
+ if (caa_likely(!__event->filter(__event->filter_data, __stackvar.__filter_stack_data))) \
+ return; \
+ } \
+ __event_len = __event_get_size__##_provider##___##_name(__stackvar.__dynamic_len, \
_TP_ARGS_DATA_VAR(_args)); \
__event_align = __event_get_align__##_provider##___##_name(_TP_ARGS_VAR(_args)); \
lib_ring_buffer_ctx_init(&__ctx, __chan->chan, __event, __event_len, \
#undef __get_dynamic_len
/*
- * Stage 6.1 of tracepoint event generation.
+ * Stage 5.1 of tracepoint event generation.
*
- * Tracepoint loglevel enumeration definition generation.
+ * Create probe signature
*/
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
-#undef TRACEPOINT_LOGLEVEL_ENUM
-#define TRACEPOINT_LOGLEVEL_ENUM(...) __VA_ARGS__
-
-#undef tp_loglevel
-#define tp_loglevel(_identifier, _value) \
-static const struct tracepoint_loglevel_entry \
- _TP_COMBINE_TOKENS4(__tp_loglevel_entry__, TRACEPOINT_PROVIDER, ___, _identifier) = { \
- .identifier = #_identifier, \
- .value = (_value), \
- };
-
-#include TRACEPOINT_INCLUDE
-
-/*
- * Stage 6.2 of tracepoint event generation.
- *
- * Tracepoint loglevel enumeration array generation.
- */
-
-/* Reset all macros within TRACEPOINT_EVENT */
-#include <lttng/ust-tracepoint-event-reset.h>
+#undef TP_ARGS
+#define TP_ARGS(...) __VA_ARGS__
-#undef TRACEPOINT_LOGLEVEL_ENUM
-#define TRACEPOINT_LOGLEVEL_ENUM(...) __VA_ARGS__
+#define _TP_EXTRACT_STRING2(...) #__VA_ARGS__
-#undef tp_loglevel
-#define tp_loglevel(_identifier, _value) \
- &_TP_COMBINE_TOKENS4(__tp_loglevel_entry__, TRACEPOINT_PROVIDER, ___, _identifier), \
+#undef TRACEPOINT_EVENT_CLASS
+#define TRACEPOINT_EVENT_CLASS(_provider, _name, _args, _fields) \
+const char __tp_event_signature___##_provider##___##_name[] = \
+ _TP_EXTRACT_STRING2(_args);
-static const struct tracepoint_loglevel_entry *_TP_COMBINE_TOKENS(__tracepoint_loglevel_enum__, TRACEPOINT_PROVIDER)[] = {
#include TRACEPOINT_INCLUDE
-};
+
+#undef _TP_EXTRACT_STRING2
/*
- * Stage 7 of tracepoint event generation.
+ * Stage 6 of tracepoint event generation.
*
* Tracepoint loglevel mapping definition generation. We generate a
* symbol for each mapping for a provider/event to ensure at most a 1 to
#include <lttng/ust-tracepoint-event-reset.h>
#undef TRACEPOINT_LOGLEVEL
-#define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \
-static const struct tracepoint_loglevel_entry * \
- _loglevel_mapping___##__provider##___##__name = \
- &__tp_loglevel_entry__##__provider##___##__loglevel;
+#define TRACEPOINT_LOGLEVEL(__provider, __name, __loglevel) \
+static const int _loglevel_value___##__provider##___##__name = __loglevel; \
+static const int *_loglevel___##__provider##___##__name = \
+ &_loglevel_value___##__provider##___##__name;
#include TRACEPOINT_INCLUDE
/*
- * Stage 8.1 of tracepoint event generation.
+ * Stage 7.1 of tracepoint event generation.
*
* Create events description structures. We use a weakref because
* loglevels are optional. If not declared, the event will point to the
#undef TRACEPOINT_EVENT_INSTANCE
#define TRACEPOINT_EVENT_INSTANCE(_provider, _template, _name, _args) \
-static const struct tracepoint_loglevel_entry * \
- __ref_loglevel_mapping___##_provider##___##_name \
- __attribute__((weakref ("_loglevel_mapping___" #_provider "___" #_name))); \
+static const int * \
+ __ref_loglevel___##_provider##___##_name \
+ __attribute__((weakref ("_loglevel___" #_provider "___" #_name))); \
const struct lttng_event_desc __event_desc___##_provider##_##_name = { \
.fields = __event_fields___##_provider##___##_template, \
.name = #_provider ":" #_name, \
- .probe_callback = (void *) &__event_probe__##_provider##___##_template,\
+ .probe_callback = (void (*)(void)) &__event_probe__##_provider##___##_template,\
.nr_fields = _TP_ARRAY_SIZE(__event_fields___##_provider##___##_template), \
- .loglevel = &__ref_loglevel_mapping___##_provider##___##_name, \
+ .loglevel = &__ref_loglevel___##_provider##___##_name, \
+ .signature = __tp_event_signature___##_provider##___##_template, \
};
#include TRACEPOINT_INCLUDE
/*
- * Stage 8.2 of tracepoint event generation.
+ * Stage 7.2 of tracepoint event generation.
*
* Create array of events.
*/
/*
- * Stage 9 of tracepoint event generation.
+ * Stage 8 of tracepoint event generation.
*
* Create a toplevel descriptor for the whole probe.
*/
.provider = __tp_stringify(TRACEPOINT_PROVIDER),
.event_desc = _TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER),
.nr_events = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__event_desc___, TRACEPOINT_PROVIDER)),
- .loglevels = _TP_COMBINE_TOKENS(__tracepoint_loglevel_enum__, TRACEPOINT_PROVIDER),
- .nr_loglevels = _TP_ARRAY_SIZE(_TP_COMBINE_TOKENS(__tracepoint_loglevel_enum__, TRACEPOINT_PROVIDER)),
};
/*
- * Stage 10 of tracepoint event generation.
+ * Stage 9 of tracepoint event generation.
*
* Register/unregister probes at module load/unload.
+ *
+ * Generate the constructor as an externally visible symbol for use when
+ * linking the probe statically.
*/
/* Reset all macros within TRACEPOINT_EVENT */
#include <lttng/ust-tracepoint-event-reset.h>
-
static void __attribute__((constructor))
_TP_COMBINE_TOKENS(__lttng_events_init__, TRACEPOINT_PROVIDER)(void)
{
{
ltt_probe_unregister(&_TP_COMBINE_TOKENS(__probe_desc___, TRACEPOINT_PROVIDER));
}
+
+int _TP_COMBINE_TOKENS(__tracepoint_provider_, TRACEPOINT_PROVIDER);
projects / lttng-ust.git / blobdiff