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 TRACE_EVENT_FN
  30 #define TRACE_EVENT_FN(name, proto, args, tstruct,              \
  31                 assign, print, reg, unreg)                      \
  32         DEFINE_TRACE_FN(name, reg, unreg)
  33
  34 #undef DEFINE_EVENT
  35 #define DEFINE_EVENT(template, name, proto, args) \
  36         DEFINE_TRACE(name)
  37
  38 #undef DEFINE_EVENT_PRINT
  39 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
  40         DEFINE_TRACE(name)
  41
  42 #undef DECLARE_TRACE
  43 #define DECLARE_TRACE(name, proto, args)        \
  44         DEFINE_TRACE(name)
  45
  46 #undef TRACE_INCLUDE
  47 #undef __TRACE_INCLUDE
  48
  49 #ifndef TRACE_INCLUDE_FILE
  50 # define TRACE_INCLUDE_FILE TRACE_SYSTEM
  51 # define UNDEF_TRACE_INCLUDE_FILE
  52 #endif
  53
  54 #ifndef TRACE_INCLUDE_PATH
  55 # define __TRACE_INCLUDE(system) <trace/events/system.h>
  56 # define UNDEF_TRACE_INCLUDE_PATH
  57 #else
  58 # define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
  59 #endif
  60
  61 # define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
  62
  63 /* Let the trace headers be reread */
  64 #define TRACE_HEADER_MULTI_READ
  65
  66 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  67
  68 /* Make all open coded DECLARE_TRACE nops */
  69 #undef DECLARE_TRACE
  70 #define DECLARE_TRACE(name, proto, args)
  71
  72 #ifdef CONFIG_EVENT_TRACING
  73 #include <trace/ftrace.h>
  74 #endif
  75
  76 #undef TRACE_EVENT
  77 #undef TRACE_EVENT_FN
  78 #undef DECLARE_EVENT_CLASS
  79 #undef DEFINE_EVENT
  80 #undef DEFINE_EVENT_PRINT
  81 #undef TRACE_HEADER_MULTI_READ
  82 #undef DECLARE_TRACE
  83
  84 /* Only undef what we defined in this file */
  85 #ifdef UNDEF_TRACE_INCLUDE_FILE
  86 # undef TRACE_INCLUDE_FILE
  87 # undef UNDEF_TRACE_INCLUDE_FILE
  88 #endif
  89
  90 #ifdef UNDEF_TRACE_INCLUDE_PATH
  91 # undef TRACE_INCLUDE_PATH
  92 # undef UNDEF_TRACE_INCLUDE_PATH
  93 #endif
  94
  95 /* We may be processing more files */
  96 #define CREATE_TRACE_POINTS
  97
  98 #endif /* CREATE_TRACE_POINTS */