include/trace/define_trace.h

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