mirror of
https://github.com/torvalds/linux.git
synced 2024-11-15 00:21:59 +00:00
3a73333fb3
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>
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/* 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 */
|