Quelle define_custom_trace.h Sprache: 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 */

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