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tracing: Add TRACE_CUSTOM_EVENT() macro

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To make it really easy to add custom events from modules, add a
TRACE_CUSTOM_EVENT() macro that acts just like the TRACE_EVENT() macro,
but creates a custom event to an already existing tracepoint.

The trace_custom_sched.[ch] has been updated to use this new macro to show
how simple it is.

Link: https://lkml.kernel.org/r/20220303220625.738622494@goodmis.org

Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Google) 2022-03-03 17:05:34 -05:00
parent af6b9668e8
commit 3a73333fb3
6 changed files with 441 additions and 237 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
include/linux/trace_events.h
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@ -315,6 +315,7 @@ enum {
TRACE_EVENT_FL_KPROBE_BIT,
TRACE_EVENT_FL_UPROBE_BIT,
TRACE_EVENT_FL_EPROBE_BIT,
TRACE_EVENT_FL_CUSTOM_BIT,
};
/*
@ -328,6 +329,9 @@ enum {
* KPROBE - Event is a kprobe
* UPROBE - Event is a uprobe
* EPROBE - Event is an event probe
* CUSTOM - Event is a custom event (to be attached to an exsiting tracepoint)
* This is set when the custom event has not been attached
* to a tracepoint yet, then it is cleared when it is.
*/
enum {
TRACE_EVENT_FL_FILTERED = (1 << TRACE_EVENT_FL_FILTERED_BIT),
@ -339,6 +343,7 @@ enum {
TRACE_EVENT_FL_KPROBE = (1 << TRACE_EVENT_FL_KPROBE_BIT),
TRACE_EVENT_FL_UPROBE = (1 << TRACE_EVENT_FL_UPROBE_BIT),
TRACE_EVENT_FL_EPROBE = (1 << TRACE_EVENT_FL_EPROBE_BIT),
TRACE_EVENT_FL_CUSTOM = (1 << TRACE_EVENT_FL_CUSTOM_BIT),
};
#define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE)
@ -440,7 +445,9 @@ static inline bool bpf_prog_array_valid(struct trace_event_call *call)
static inline const char *
trace_event_name(struct trace_event_call *call)
{
if (call->flags & TRACE_EVENT_FL_TRACEPOINT)
if (call->flags & TRACE_EVENT_FL_CUSTOM)
return call->name;
else if (call->flags & TRACE_EVENT_FL_TRACEPOINT)
return call->tp ? call->tp->name : NULL;
else
return call->name;
@ -901,3 +908,18 @@ perf_trace_buf_submit(void *raw_data, int size, int rctx, u16 type,
#endif
#endif /* _LINUX_TRACE_EVENT_H */
/*
* Note: we keep the TRACE_CUSTOM_EVENT outside the include file ifdef protection.
* This is due to the way trace custom events work. If a file includes two
* trace event headers under one "CREATE_CUSTOM_TRACE_EVENTS" the first include
* will override the TRACE_CUSTOM_EVENT and break the second include.
*/
#ifndef TRACE_CUSTOM_EVENT
#define DECLARE_CUSTOM_EVENT_CLASS(name, proto, args, tstruct, assign, print)
#define DEFINE_CUSTOM_EVENT(template, name, proto, args)
#define TRACE_CUSTOM_EVENT(name, proto, args, struct, assign, print)
#endif /* ifdef TRACE_CUSTOM_EVENT (see note above) */

77
include/trace/define_custom_trace.h Normal file
View File

@ -0,0 +1,77 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Trace files that want to automate creation of all tracepoints defined
* in their file should include this file. The following are macros that the
* trace file may define:
*
* TRACE_SYSTEM defines the system the tracepoint is for
*
* TRACE_INCLUDE_FILE if the file name is something other than TRACE_SYSTEM.h
* This macro may be defined to tell define_trace.h what file to include.
* Note, leave off the ".h".
*
* TRACE_INCLUDE_PATH if the path is something other than core kernel include/trace
* then this macro can define the path to use. Note, the path is relative to
* define_trace.h, not the file including it. Full path names for out of tree
* modules must be used.
*/
#ifdef CREATE_CUSTOM_TRACE_EVENTS
/* Prevent recursion */
#undef CREATE_CUSTOM_TRACE_EVENTS
#include <linux/stringify.h>
#undef TRACE_CUSTOM_EVENT
#define TRACE_CUSTOM_EVENT(name, proto, args, tstruct, assign, print)
#undef DEFINE_CUSTOM_EVENT
#define DEFINE_CUSTOM_EVENT(template, name, proto, args)
#undef TRACE_INCLUDE
#undef __TRACE_INCLUDE
#ifndef TRACE_INCLUDE_FILE
# define TRACE_INCLUDE_FILE TRACE_SYSTEM
# define UNDEF_TRACE_INCLUDE_FILE
#endif
#ifndef TRACE_INCLUDE_PATH
# define __TRACE_INCLUDE(system) <trace/events/system.h>
# define UNDEF_TRACE_INCLUDE_PATH
#else
# define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
#endif
# define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
/* Let the trace headers be reread */
#define TRACE_CUSTOM_MULTI_READ
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
#ifdef TRACEPOINTS_ENABLED
#include <trace/trace_custom_events.h>
#endif
#undef TRACE_CUSTOM_EVENT
#undef DECLARE_CUSTOM_EVENT_CLASS
#undef DEFINE_CUSTOM_EVENT
#undef TRACE_CUSTOM_MULTI_READ
/* Only undef what we defined in this file */
#ifdef UNDEF_TRACE_INCLUDE_FILE
# undef TRACE_INCLUDE_FILE
# undef UNDEF_TRACE_INCLUDE_FILE
#endif
#ifdef UNDEF_TRACE_INCLUDE_PATH
# undef TRACE_INCLUDE_PATH
# undef UNDEF_TRACE_INCLUDE_PATH
#endif
/* We may be processing more files */
#define CREATE_CUSTOM_TRACE_POINTS
#endif /* CREATE_CUSTOM_TRACE_POINTS */

221
include/trace/trace_custom_events.h Normal file
View File

@ -0,0 +1,221 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* This is similar to the trace_events.h file, but is to only
* create custom trace events to be attached to existing tracepoints.
* Where as the TRACE_EVENT() macro (from trace_events.h) will create
* both the trace event and the tracepoint it will attach the event to,
* TRACE_CUSTOM_EVENT() is to create only a custom version of an existing
* trace event (created by TRACE_EVENT() or DEFINE_EVENT()), and will
* be placed in the "custom" system.
*/
#include <linux/trace_events.h>
/* All custom events are placed in the custom group */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM custom
#ifndef TRACE_SYSTEM_VAR
#define TRACE_SYSTEM_VAR TRACE_SYSTEM
#endif
/* The init stage creates the system string and enum mappings */
#include "stages/init.h"
#undef TRACE_CUSTOM_EVENT
#define TRACE_CUSTOM_EVENT(name, proto, args, tstruct, assign, print) \
DECLARE_CUSTOM_EVENT_CLASS(name, \
PARAMS(proto), \
PARAMS(args), \
PARAMS(tstruct), \
PARAMS(assign), \
PARAMS(print)); \
DEFINE_CUSTOM_EVENT(name, name, PARAMS(proto), PARAMS(args));
/* Stage 1 creates the structure of the recorded event layout */
#include "stages/stage1_defines.h"
#undef DECLARE_CUSTOM_EVENT_CLASS
#define DECLARE_CUSTOM_EVENT_CLASS(name, proto, args, tstruct, assign, print) \
struct trace_custom_event_raw_##name { \
struct trace_entry ent; \
tstruct \
char __data[]; \
}; \
\
static struct trace_event_class custom_event_class_##name;
#undef DEFINE_CUSTOM_EVENT
#define DEFINE_CUSTOM_EVENT(template, name, proto, args) \
static struct trace_event_call __used \
__attribute__((__aligned__(4))) custom_event_##name
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/* Stage 2 creates the custom class */
#include "stages/stage2_defines.h"
#undef DECLARE_CUSTOM_EVENT_CLASS
#define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
struct trace_custom_event_data_offsets_##call { \
tstruct; \
};
#undef DEFINE_CUSTOM_EVENT
#define DEFINE_CUSTOM_EVENT(template, name, proto, args)
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/* Stage 3 create the way to print the custom event */
#include "stages/stage3_defines.h"
#undef DECLARE_CUSTOM_EVENT_CLASS
#define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
static notrace enum print_line_t \
trace_custom_raw_output_##call(struct trace_iterator *iter, int flags, \
struct trace_event *trace_event) \
{ \
struct trace_seq *s = &iter->seq; \
struct trace_seq __maybe_unused *p = &iter->tmp_seq; \
struct trace_custom_event_raw_##call *field; \
int ret; \
\
field = (typeof(field))iter->ent; \
\
ret = trace_raw_output_prep(iter, trace_event); \
if (ret != TRACE_TYPE_HANDLED) \
return ret; \
\
trace_event_printf(iter, print); \
\
return trace_handle_return(s); \
} \
static struct trace_event_functions trace_custom_event_type_funcs_##call = { \
.trace = trace_custom_raw_output_##call, \
};
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/* Stage 4 creates the offset layout for the fields */
#include "stages/stage4_defines.h"
#undef DECLARE_CUSTOM_EVENT_CLASS
#define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, func, print) \
static struct trace_event_fields trace_custom_event_fields_##call[] = { \
tstruct \
{} };
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/* Stage 5 creates the helper function for dynamic fields */
#include "stages/stage5_defines.h"
#undef DECLARE_CUSTOM_EVENT_CLASS
#define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
static inline notrace int trace_custom_event_get_offsets_##call( \
struct trace_custom_event_data_offsets_##call *__data_offsets, proto) \
{ \
int __data_size = 0; \
int __maybe_unused __item_length; \
struct trace_custom_event_raw_##call __maybe_unused *entry; \
\
tstruct; \
\
return __data_size; \
}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/* Stage 6 creates the probe function that records the event */
#include "stages/stage6_defines.h"
#undef DECLARE_CUSTOM_EVENT_CLASS
#define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
\
static notrace void \
trace_custom_event_raw_event_##call(void *__data, proto) \
{ \
struct trace_event_file *trace_file = __data; \
struct trace_custom_event_data_offsets_##call __maybe_unused __data_offsets; \
struct trace_event_buffer fbuffer; \
struct trace_custom_event_raw_##call *entry; \
int __data_size; \
\
if (trace_trigger_soft_disabled(trace_file)) \
return; \
\
__data_size = trace_custom_event_get_offsets_##call(&__data_offsets, args); \
\
entry = trace_event_buffer_reserve(&fbuffer, trace_file, \
sizeof(*entry) + __data_size); \
\
if (!entry) \
return; \
\
tstruct \
\
{ assign; } \
\
trace_event_buffer_commit(&fbuffer); \
}
/*
* The ftrace_test_custom_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.
*/
#undef DEFINE_CUSTOM_EVENT
#define DEFINE_CUSTOM_EVENT(template, call, proto, args) \
static inline void ftrace_test_custom_probe_##call(void) \
{ \
check_trace_callback_type_##call(trace_custom_event_raw_event_##template); \
}
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
/* Stage 7 creates the actual class and event structure for the custom event */
#include "stages/stage7_defines.h"
#undef DECLARE_CUSTOM_EVENT_CLASS
#define DECLARE_CUSTOM_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
static char custom_print_fmt_##call[] = print; \
static struct trace_event_class __used __refdata custom_event_class_##call = { \
.system = TRACE_SYSTEM_STRING, \
.fields_array = trace_custom_event_fields_##call, \
.fields = LIST_HEAD_INIT(custom_event_class_##call.fields),\
.raw_init = trace_event_raw_init, \
.probe = trace_custom_event_raw_event_##call, \
.reg = trace_event_reg, \
};
#undef DEFINE_CUSTOM_EVENT
#define DEFINE_CUSTOM_EVENT(template, call, proto, args) \
\
static struct trace_event_call __used custom_event_##call = { \
.name = #call, \
.class = &custom_event_class_##template, \
.event.funcs = &trace_custom_event_type_funcs_##template, \
.print_fmt = custom_print_fmt_##template, \
.flags = TRACE_EVENT_FL_CUSTOM, \
}; \
static inline int trace_custom_event_##call##_update(struct tracepoint *tp) \
{ \
if (tp->name && strcmp(tp->name, #call) == 0) { \
custom_event_##call.tp = tp; \
custom_event_##call.flags = TRACE_EVENT_FL_TRACEPOINT; \
return 1; \
} \
return 0; \
} \
static struct trace_event_call __used \
__section("_ftrace_events") *__custom_event_##call = &custom_event_##call
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)

2
samples/trace_events/Makefile
View File

@ -11,7 +11,7 @@
# Here trace-events-sample.c does the CREATE_TRACE_POINTS.
#
CFLAGS_trace-events-sample.o := -I$(src)
CFLAGS_trace_custom_sched.o := -I$(src)
obj-$(CONFIG_SAMPLE_TRACE_EVENTS) += trace-events-sample.o
obj-$(CONFIG_SAMPLE_TRACE_CUSTOM_EVENTS) += trace_custom_sched.o

259
samples/trace_events/trace_custom_sched.c
View File

@ -11,256 +11,45 @@
#include <linux/version.h>
#include <linux/module.h>
#include <linux/sched.h>
/*
* Must include the event header that the custom event will attach to,
* from the C file, and not in the custom header file.
*/
#include <trace/events/sched.h>
#define THIS_SYSTEM "custom_sched"
/* Declare CREATE_CUSTOM_TRACE_EVENTS before including custom header */
#define CREATE_CUSTOM_TRACE_EVENTS
#define SCHED_PRINT_FMT \
C("prev_prio=%d next_pid=%d next_prio=%d", REC->prev_prio, REC->next_pid, \
REC->next_prio)
#define SCHED_WAKING_FMT \
C("pid=%d prio=%d", REC->pid, REC->prio)
#undef C
#define C(a, b...) a, b
static struct trace_event_fields sched_switch_fields[] = {
{
.type = "unsigned short",
.name = "prev_prio",
.size = sizeof(short),
.align = __alignof__(short),
.is_signed = 0,
.filter_type = FILTER_OTHER,
},
{
.type = "unsigned short",
.name = "next_prio",
.size = sizeof(short),
.align = __alignof__(short),
.is_signed = 0,
.filter_type = FILTER_OTHER,
},
{
.type = "unsigned int",
.name = "next_prio",
.size = sizeof(int),
.align = __alignof__(int),
.is_signed = 0,
.filter_type = FILTER_OTHER,
},
{}
};
struct sched_event {
struct trace_entry ent;
unsigned short prev_prio;
unsigned short next_prio;
unsigned int next_pid;
};
static struct trace_event_fields sched_waking_fields[] = {
{
.type = "unsigned int",
.name = "pid",
.size = sizeof(int),
.align = __alignof__(int),
.is_signed = 0,
.filter_type = FILTER_OTHER,
},
{
.type = "unsigned short",
.name = "prio",
.size = sizeof(short),
.align = __alignof__(short),
.is_signed = 0,
.filter_type = FILTER_OTHER,
},
{}
};
struct wake_event {
struct trace_entry ent;
unsigned int pid;
unsigned short prio;
};
static void sched_switch_probe(void *data, bool preempt, struct task_struct *prev,
struct task_struct *next)
{
struct trace_event_file *trace_file = data;
struct trace_event_buffer fbuffer;
struct sched_event *entry;
if (trace_trigger_soft_disabled(trace_file))
return;
entry = trace_event_buffer_reserve(&fbuffer, trace_file,
sizeof(*entry));
if (!entry)
return;
entry->prev_prio = prev->prio;
entry->next_prio = next->prio;
entry->next_pid = next->pid;
trace_event_buffer_commit(&fbuffer);
}
static struct trace_event_class sched_switch_class = {
.system = THIS_SYSTEM,
.reg = trace_event_reg,
.fields_array = sched_switch_fields,
.fields = LIST_HEAD_INIT(sched_switch_class.fields),
.probe = sched_switch_probe,
};
static void sched_waking_probe(void *data, struct task_struct *t)
{
struct trace_event_file *trace_file = data;
struct trace_event_buffer fbuffer;
struct wake_event *entry;
if (trace_trigger_soft_disabled(trace_file))
return;
entry = trace_event_buffer_reserve(&fbuffer, trace_file,
sizeof(*entry));
if (!entry)
return;
entry->prio = t->prio;
entry->pid = t->pid;
trace_event_buffer_commit(&fbuffer);
}
static struct trace_event_class sched_waking_class = {
.system = THIS_SYSTEM,
.reg = trace_event_reg,
.fields_array = sched_waking_fields,
.fields = LIST_HEAD_INIT(sched_waking_class.fields),
.probe = sched_waking_probe,
};
static enum print_line_t sched_switch_output(struct trace_iterator *iter, int flags,
struct trace_event *trace_event)
{
struct trace_seq *s = &iter->seq;
struct sched_event *REC = (struct sched_event *)iter->ent;
int ret;
ret = trace_raw_output_prep(iter, trace_event);
if (ret != TRACE_TYPE_HANDLED)
return ret;
trace_seq_printf(s, SCHED_PRINT_FMT);
trace_seq_putc(s, '\n');
return trace_handle_return(s);
}
static struct trace_event_functions sched_switch_funcs = {
.trace = sched_switch_output,
};
static enum print_line_t sched_waking_output(struct trace_iterator *iter, int flags,
struct trace_event *trace_event)
{
struct trace_seq *s = &iter->seq;
struct wake_event *REC = (struct wake_event *)iter->ent;
int ret;
ret = trace_raw_output_prep(iter, trace_event);
if (ret != TRACE_TYPE_HANDLED)
return ret;
trace_seq_printf(s, SCHED_WAKING_FMT);
trace_seq_putc(s, '\n');
return trace_handle_return(s);
}
static struct trace_event_functions sched_waking_funcs = {
.trace = sched_waking_output,
};
#undef C
#define C(a, b...) #a "," __stringify(b)
static struct trace_event_call sched_switch_call = {
.class = &sched_switch_class,
.event = {
.funcs = &sched_switch_funcs,
},
.print_fmt = SCHED_PRINT_FMT,
.module = THIS_MODULE,
.flags = TRACE_EVENT_FL_TRACEPOINT,
};
static struct trace_event_call sched_waking_call = {
.class = &sched_waking_class,
.event = {
.funcs = &sched_waking_funcs,
},
.print_fmt = SCHED_WAKING_FMT,
.module = THIS_MODULE,
.flags = TRACE_EVENT_FL_TRACEPOINT,
};
#include "trace_custom_sched.h"
/*
* As the trace events are not exported to modules, the use of
* for_each_kernel_tracepoint() is needed to find the trace event
* to attach to. The fct() function below, is a callback that
* will be called for every event.
*
* Helper functions are created by the TRACE_CUSTOM_EVENT() macro
* update the event. Those are of the form:
*
* trace_custom_event_<event>_update()
*
* Where <event> is the event to attach.
*/
static void fct(struct tracepoint *tp, void *priv)
{
if (tp->name && strcmp(tp->name, "sched_switch") == 0)
sched_switch_call.tp = tp;
else if (tp->name && strcmp(tp->name, "sched_waking") == 0)
sched_waking_call.tp = tp;
}
static int add_event(struct trace_event_call *call)
{
int ret;
ret = register_trace_event(&call->event);
if (WARN_ON(!ret))
return -ENODEV;
ret = trace_add_event_call(call);
if (WARN_ON(ret))
unregister_trace_event(&call->event);
return ret;
trace_custom_event_sched_switch_update(tp);
trace_custom_event_sched_waking_update(tp);
}
static int __init trace_sched_init(void)
{
int ret;
check_trace_callback_type_sched_switch(sched_switch_probe);
check_trace_callback_type_sched_waking(sched_waking_probe);
for_each_kernel_tracepoint(fct, NULL);
ret = add_event(&sched_switch_call);
if (ret)
return ret;
ret = add_event(&sched_waking_call);
if (ret)
trace_remove_event_call(&sched_switch_call);
return ret;
return 0;
}
static void __exit trace_sched_exit(void)
{
trace_set_clr_event(THIS_SYSTEM, "sched_switch", 0);
trace_set_clr_event(THIS_SYSTEM, "sched_waking", 0);
trace_remove_event_call(&sched_switch_call);
trace_remove_event_call(&sched_waking_call);
}
module_init(trace_sched_init);

95
samples/trace_events/trace_custom_sched.h Normal file
View File

@ -0,0 +1,95 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Like the headers that use TRACE_EVENT(), the TRACE_CUSTOM_EVENT()
* needs a header that allows for multiple inclusions.
*
* Test for a unique name (here we have _TRACE_CUSTOM_SCHED_H),
* also allowing to continue if TRACE_CUSTOM_MULTI_READ is defined.
*/
#if !defined(_TRACE_CUSTOM_SCHED_H) || defined(TRACE_CUSTOM_MULTI_READ)
#define _TRACE_CUSTOM_SCHED_H
/* Include linux/trace_events.h for initial defines of TRACE_CUSTOM_EVENT() */
#include <linux/trace_events.h>
/*
* TRACE_CUSTOM_EVENT() is just like TRACE_EVENT(). The first parameter
* is the event name of an existing event where the TRACE_EVENT has been included
* in the C file before including this file.
*/
TRACE_CUSTOM_EVENT(sched_switch,
/*
* The TP_PROTO() and TP_ARGS must match the trace event
* that the custom event is using.
*/
TP_PROTO(bool preempt,
struct task_struct *prev,
struct task_struct *next),
TP_ARGS(preempt, prev, next),
/*
* The next fields are where the customization happens.
* The TP_STRUCT__entry() defines what will be recorded
* in the ring buffer when the custom event triggers.
*
* The rest is just like the TRACE_EVENT() macro except that
* it uses the custom entry.
*/
TP_STRUCT__entry(
__field( unsigned short, prev_prio )
__field( unsigned short, next_prio )
__field( pid_t, next_pid )
),
TP_fast_assign(
__entry->prev_prio = prev->prio;
__entry->next_pid = next->pid;
__entry->next_prio = next->prio;
),
TP_printk("prev_prio=%d next_pid=%d next_prio=%d",
__entry->prev_prio, __entry->next_pid, __entry->next_prio)
)
TRACE_CUSTOM_EVENT(sched_waking,
TP_PROTO(struct task_struct *p),
TP_ARGS(p),
TP_STRUCT__entry(
__field( pid_t, pid )
__field( unsigned short, prio )
),
TP_fast_assign(
__entry->pid = p->pid;
__entry->prio = p->prio;
),
TP_printk("pid=%d prio=%d", __entry->pid, __entry->prio)
)
#endif
/*
* Just like the headers that create TRACE_EVENTs, the below must
* be outside the protection of the above #if block.
*/
/*
* It is required that the Makefile includes:
* CFLAGS_<c_file>.o := -I$(src)
*/
#undef TRACE_INCLUDE_PATH
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_PATH .
/*
* It is requred that the TRACE_INCLUDE_FILE be the same
* as this file without the ".h".
*/
#define TRACE_INCLUDE_FILE trace_custom_sched
#include <trace/define_custom_trace.h>