include/trace/define_trace.h

   1 /*
   2  * Trace files that want to automate creation 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_CONDITION
  30 #define TRACE_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \
  31         TRACE_EVENT(name,                                               \
  32                 PARAMS(proto),                                          \
  33                 PARAMS(args),                                           \
  34                 PARAMS(tstruct),                                        \
  35                 PARAMS(assign),                                         \
  36                 PARAMS(print))
  37
  38 #undef TRACE_EVENT_FN
  39 #define TRACE_EVENT_FN(name, proto, args, tstruct,              \
  40                 assign, print, reg, unreg)                      \
  41         DEFINE_TRACE_FN(name, reg, unreg)
  42
  43 #undef DEFINE_EVENT
  44 #define DEFINE_EVENT(template, name, proto, args) \
  45         DEFINE_TRACE(name)
  46
  47 #undef DEFINE_EVENT_FN
  48 #define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
  49         DEFINE_TRACE_FN(name, reg, unreg)
  50
  51 #undef DEFINE_EVENT_PRINT
  52 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)  \
  53         DEFINE_TRACE(name)
  54
  55 #undef DEFINE_EVENT_CONDITION
  56 #define DEFINE_EVENT_CONDITION(template, name, proto, args, cond) \
  57         DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
  58
  59 #undef DECLARE_TRACE
  60 #define DECLARE_TRACE(name, proto, args)        \
  61         DEFINE_TRACE(name)
  62
  63 #undef TRACE_INCLUDE
  64 #undef __TRACE_INCLUDE
  65
  66 #ifndef TRACE_INCLUDE_FILE
  67 # define TRACE_INCLUDE_FILE TRACE_SYSTEM
  68 # define UNDEF_TRACE_INCLUDE_FILE
  69 #endif
  70
  71 #ifndef TRACE_INCLUDE_PATH
  72 # define __TRACE_INCLUDE(system) <trace/events/system.h>
  73 # define UNDEF_TRACE_INCLUDE_PATH
  74 #else
  75 # define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
  76 #endif
  77
  78 # define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
  79
  80 /* Let the trace headers be reread */
  81 #define TRACE_HEADER_MULTI_READ
  82
  83 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
  84
  85 /* Make all open coded DECLARE_TRACE nops */
  86 #undef DECLARE_TRACE
  87 #define DECLARE_TRACE(name, proto, args)
  88
  89 #ifdef TRACEPOINTS_ENABLED
  90 #include <trace/trace_events.h>
  91 #include <trace/perf.h>
  92 #endif
  93
  94 #undef TRACE_EVENT
  95 #undef TRACE_EVENT_FN
  96 #undef TRACE_EVENT_CONDITION
  97 #undef DECLARE_EVENT_CLASS
  98 #undef DEFINE_EVENT
  99 #undef DEFINE_EVENT_FN
 100 #undef DEFINE_EVENT_PRINT
 101 #undef DEFINE_EVENT_CONDITION
 102 #undef TRACE_HEADER_MULTI_READ
 103 #undef DECLARE_TRACE
 104
 105 /* Only undef what we defined in this file */
 106 #ifdef UNDEF_TRACE_INCLUDE_FILE
 107 # undef TRACE_INCLUDE_FILE
 108 # undef UNDEF_TRACE_INCLUDE_FILE
 109 #endif
 110
 111 #ifdef UNDEF_TRACE_INCLUDE_PATH
 112 # undef TRACE_INCLUDE_PATH
 113 # undef UNDEF_TRACE_INCLUDE_PATH
 114 #endif
 115
 116 /* We may be processing more files */
 117 #define CREATE_TRACE_POINTS
 118
 119 #endif /* CREATE_TRACE_POINTS */