define_custom_trace.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Trace files that want to automate creation of all tracepoints defined
   4  * in their file should include this file. The following are macros that the
   5  * trace file may define:
   6  *
   7  * TRACE_SYSTEM defines the system the tracepoint is for
   8  *
   9  * TRACE_INCLUDE_FILE if the file name is something other than TRACE_SYSTEM.h
  10  *     This macro may be defined to tell define_trace.h what file to include.
  11  *     Note, leave off the ".h".
  12  *
  13  * TRACE_INCLUDE_PATH if the path is something other than core kernel include/trace
  14  *     then this macro can define the path to use. Note, the path is relative to
  15  *     define_trace.h, not the file including it. Full path names for out of tree
  16  *     modules must be used.
  17  */
  18
  19 #ifdef CREATE_CUSTOM_TRACE_EVENTS
  20
  21 /* Prevent recursion */
  22 #undef CREATE_CUSTOM_TRACE_EVENTS
  23
  24 #include <linux/stringify.h>
  25
  26 #undef TRACE_CUSTOM_EVENT
  27 #define TRACE_CUSTOM_EVENT(name, proto, args, tstruct, assign, print)
  28
  29 #undef DEFINE_CUSTOM_EVENT
  30 #define DEFINE_CUSTOM_EVENT(template, name, proto, args)
  31
  32 #undef TRACE_INCLUDE
  33 #undef __TRACE_INCLUDE
  34
  35 #ifndef TRACE_INCLUDE_FILE
  36 # define TRACE_INCLUDE_FILE TRACE_SYSTEM
  37 # define UNDEF_TRACE_INCLUDE_FILE
  38 #endif
  39
  40 #ifndef TRACE_INCLUDE_PATH
  41 # define __TRACE_INCLUDE(system) <trace/events/system.h>
  42 # define UNDEF_TRACE_INCLUDE_PATH
  43 #else
  44 # define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
  45 #endif
  46
  47 # define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
  48
  49 /* Let the trace headers be reread */
  50 #define TRACE_CUSTOM_MULTI_READ
  51
  52 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  53
  54 #ifdef TRACEPOINTS_ENABLED
  55 #include <trace/trace_custom_events.h>
  56 #endif
  57
  58 #undef TRACE_CUSTOM_EVENT
  59 #undef DECLARE_CUSTOM_EVENT_CLASS
  60 #undef DEFINE_CUSTOM_EVENT
  61 #undef TRACE_CUSTOM_MULTI_READ
  62
  63 /* Only undef what we defined in this file */
  64 #ifdef UNDEF_TRACE_INCLUDE_FILE
  65 # undef TRACE_INCLUDE_FILE
  66 # undef UNDEF_TRACE_INCLUDE_FILE
  67 #endif
  68
  69 #ifdef UNDEF_TRACE_INCLUDE_PATH
  70 # undef TRACE_INCLUDE_PATH
  71 # undef UNDEF_TRACE_INCLUDE_PATH
  72 #endif
  73
  74 /* We may be processing more files */
  75 #define CREATE_CUSTOM_TRACE_POINTS
  76
  77 #endif /* CREATE_CUSTOM_TRACE_POINTS */