+++ /dev/null
-/*
- * lttng-events.h
- *
- * Copyright (C) 2009 Steven Rostedt <rostedt@goodmis.org>
- * Copyright (C) 2010-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Dual LGPL v2.1/GPL v2 license.
- */
-
-#include <linux/debugfs.h>
-#include "lttng.h"
-#include "lttng-types.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"
-
-/*
- * 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.
- */
-
-#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 DEFINE_EVENT_PRINT
-#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
- DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(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)) \
-
-/*
- * Stage 1 of the trace events.
- *
- * Create dummy trace calls for each events, verifying that the LTTng module
- * TRACE_EVENT headers match the kernel arguments. Will be optimized out by the
- * compiler.
- */
-
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-
-#undef TP_PROTO
-#define TP_PROTO(args...) args
-
-#undef TP_ARGS
-#define TP_ARGS(args...) args
-
-#undef DEFINE_EVENT
-#define DEFINE_EVENT(_template, _name, _proto, _args) \
-void trace_##_name(_proto);
-
-#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.
- */
-
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-
-/* Named field types must be defined in lttng-types.h */
-
-#undef __field_full
-#define __field_full(_type, _item, _order, _base) \
- { \
- .name = #_item, \
- .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)
-
-#undef __field_network
-#define __field_network(_type, _item) \
- __field_full(_type, _item, __BIG_ENDIAN, 10)
-
-#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 = \
- { \
- .atype = atype_array, \
- .u.array = \
- { \
- .length = _length, \
- .elem_type = __type_integer(_type, _order, _base, _encoding), \
- }, \
- }, \
- },
-
-#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 = \
- { \
- .atype = atype_sequence, \
- .u.sequence = \
- { \
- .length_type = __type_integer(u32, __BYTE_ORDER, 10, none), \
- .elem_type = __type_integer(_type, _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 __string
-#define __string(_item, _src) \
- { \
- .name = #_item, \
- .type = \
- { \
- .atype = atype_string, \
- .u.basic.string.encoding = lttng_encode_UTF8, \
- }, \
- },
-
-#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) \
- static const struct lttng_event_field __event_fields___##_name[] = { \
- _tstruct \
- };
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-#undef __type_integer
-
-/*
- * Stage 3 of the trace events.
- *
- * Create probe callback prototypes.
- */
-
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-
-#undef TP_PROTO
-#define TP_PROTO(args...) args
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
-static void __event_probe__##_name(void *__data, _proto);
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-/*
- * Stage 4 of the trace events.
- *
- * Create an array of events.
- */
-
-/* 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), \
- .owner = THIS_MODULE, \
- },
-
-#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 5 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 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)),
-};
-
-#undef TP_ID1
-#undef TP_ID
-
-/*
- * Stage 6 of the trace events.
- *
- * Create static inline function that calculates event size.
- */
-
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-
-/* Named field types must be defined in lttng-types.h */
-
-#undef __field_full
-#define __field_full(_type, _item, _order, _base) \
- __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \
- __event_len += sizeof(_type);
-
-#undef __array_enc_ext
-#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \
- __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \
- __event_len += sizeof(_type) * (_length);
-
-#undef __dynamic_array_enc_ext
-#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
- __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(u32)); \
- __event_len += sizeof(u32); \
- __event_len += lib_ring_buffer_align(__event_len, ltt_alignof(_type)); \
- __dynamic_len[__dynamic_len_idx] = (_length); \
- __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;
-
-#undef TP_PROTO
-#define TP_PROTO(args...) args
-
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
-static inline size_t __event_get_size__##_name(size_t *__dynamic_len, _proto) \
-{ \
- size_t __event_len = 0; \
- unsigned int __dynamic_len_idx = 0; \
- \
- if (0) \
- (void) __dynamic_len_idx; /* don't warn if unused */ \
- _tstruct \
- return __event_len; \
-}
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-/*
- * Stage 7 of the trace events.
- *
- * Create static inline function that calculates event payload alignment.
- */
-
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-
-/* Named field types must be defined in lttng-types.h */
-
-#undef __field_full
-#define __field_full(_type, _item, _order, _base) \
- __event_align = max_t(size_t, __event_align, ltt_alignof(_type));
-
-#undef __array_enc_ext
-#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \
- __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, ltt_alignof(u32)); \
- __event_align = max_t(size_t, __event_align, ltt_alignof(_type));
-
-#undef __string
-#define __string(_item, _src)
-
-#undef TP_PROTO
-#define TP_PROTO(args...) args
-
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
-
-#undef DECLARE_EVENT_CLASS
-#define DECLARE_EVENT_CLASS(_name, _proto, _args, _tstruct, _assign, _print) \
-static inline size_t __event_get_align__##_name(_proto) \
-{ \
- size_t __event_align = 1; \
- _tstruct \
- return __event_align; \
-}
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-
-/*
- * Stage 8 of the trace events.
- *
- * Create structure declaration that allows the "assign" macros to access the
- * field types.
- */
-
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-
-/* Named field types must be defined in lttng-types.h */
-
-#undef __field_full
-#define __field_full(_type, _item, _order, _base) _type _item;
-
-#undef __array_enc_ext
-#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding) \
- _type _item;
-
-#undef __dynamic_array_enc_ext
-#define __dynamic_array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
- _type _item;
-
-#undef __string
-#define __string(_item, _src) char _item;
-
-#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 __event_typemap__##_name { \
- _tstruct \
-};
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-
-/*
- * Stage 9 of the trace events.
- *
- * Create the probe function : call even size calculation and write event data
- * into the buffer.
- *
- * We use both the field and assignment macros to write the fields in the order
- * defined in the field declaration. The field declarations control the
- * execution order, jumping to the appropriate assignment block.
- */
-
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_EVENT */
-
-#undef __field_full
-#define __field_full(_type, _item, _order, _base) \
- goto __assign_##_item; \
-__end_field_##_item:
-
-#undef __array_enc_ext
-#define __array_enc_ext(_type, _item, _length, _order, _base, _encoding)\
- goto __assign_##_item; \
-__end_field_##_item:
-
-#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 __string
-#define __string(_item, _src) \
- goto __assign_##_item; \
-__end_field_##_item:
-
-/*
- * Macros mapping tp_assign() to "=", tp_memcpy() to memcpy() and tp_strcpy() to
- * strcpy().
- */
-#undef tp_assign
-#define tp_assign(dest, src) \
-__assign_##dest: \
- { \
- __typeof__(__typemap.dest) __tmp = (src); \
- lib_ring_buffer_align_ctx(&__ctx, ltt_alignof(__tmp)); \
- __chan->ops->event_write(&__ctx, &__tmp, sizeof(__tmp));\
- } \
- goto __end_field_##dest;
-
-#undef tp_memcpy
-#define tp_memcpy(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); \
- goto __end_field_##dest;
-
-#undef tp_memcpy_dyn
-#define tp_memcpy_dyn(dest, src) \
-__assign_##dest##_1: \
- { \
- u32 __tmpl = __dynamic_len[__dynamic_len_idx]; \
- lib_ring_buffer_align_ctx(&__ctx, ltt_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, \
- sizeof(__typemap.dest) * __get_dynamic_array_len(dest));\
- goto __end_field_##dest##_2;
-
-#undef tp_strcpy
-#define tp_strcpy(dest, src) \
- tp_memcpy(dest, src, __get_dynamic_array_len(dest))
-
-/* Named field types must be defined in lttng-types.h */
-
-#undef __get_str
-#define __get_str(field) field
-
-#undef __get_dynamic_array
-#define __get_dynamic_array(field) field
-
-/* Beware: this get len actually consumes the len value */
-#undef __get_dynamic_array_len
-#define __get_dynamic_array_len(field) __dynamic_len[__dynamic_len_idx++]
-
-#undef TP_PROTO
-#define TP_PROTO(args...) args
-
-#undef TP_ARGS
-#define TP_ARGS(args...) args
-
-#undef TP_STRUCT__entry
-#define TP_STRUCT__entry(args...) args
-
-#undef TP_fast_assign
-#define TP_fast_assign(args...) args
-
-#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; \
- size_t __event_len, __event_align; \
- size_t __dynamic_len_idx = 0; \
- size_t __dynamic_len[ARRAY_SIZE(__event_fields___##_name)]; \
- struct __event_typemap__##_name __typemap; \
- int __ret; \
- \
- if (0) \
- (void) __dynamic_len_idx; /* don't warn if unused */ \
- 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, __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 \
-}
-
-#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-
-/*
- * Stage 10 of the trace events.
- *
- * Register/unregister probes at module load/unload.
- */
-
-#include "lttng-events-reset.h" /* Reset all macros within TRACE_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)
-
-static int TP_ID(__lttng_events_init__, TRACE_SYSTEM)(void)
-{
- wrapper_vmalloc_sync_all();
- return ltt_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));
-}
-
-module_exit_eval(__lttng_events_exit__, TRACE_SYSTEM);
-
-#undef module_init_eval
-#undef module_exit_eval
-#undef TP_ID1
-#undef TP_ID
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