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   1 /*
   2  * Setup the showing format of trace point.
   3  *
   4  * int
   5  * ftrace_format_##call(struct trace_seq *s)
   6  * {
   7  *      struct ftrace_raw_##call field;
   8  *      int ret;
   9  *
  10  *      ret = trace_seq_printf(s, #type " " #item ";"
  11  *                             " size:%d; offset:%d;\n",
  12  *                             sizeof(field.type),
  13  *                             offsetof(struct ftrace_raw_##call,
  14  *                                      item));
  15  *
  16  * }
  17  */
  18
  19 #undef TRACE_STRUCT
  20 #define TRACE_STRUCT(args...) args
  21
  22 #undef TRACE_FIELD
  23 #define TRACE_FIELD(type, item, assign)                                 \
  24         ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"      \
  25                                "offset:%u;\tsize:%u;\n",                \
  26                                (unsigned int)offsetof(typeof(field), item), \
  27                                (unsigned int)sizeof(field.item));       \
  28         if (!ret)                                                       \
  29                 return 0;
  30
  31
  32 #undef TRACE_FIELD_SPECIAL
  33 #define TRACE_FIELD_SPECIAL(type_item, item, cmd)                       \
  34         ret = trace_seq_printf(s, "\tfield special:" #type_item ";\t"   \
  35                                "offset:%u;\tsize:%u;\n",                \
  36                                (unsigned int)offsetof(typeof(field), item), \
  37                                (unsigned int)sizeof(field.item));       \
  38         if (!ret)                                                       \
  39                 return 0;
  40
  41 #undef TRACE_EVENT_FORMAT
  42 #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)      \
  43 static int                                                              \
  44 ftrace_format_##call(struct trace_seq *s)                               \
  45 {                                                                       \
  46         struct ftrace_raw_##call field;                                 \
  47         int ret;                                                        \
  48                                                                         \
  49         tstruct;                                                        \
  50                                                                         \
  51         trace_seq_printf(s, "\nprint fmt: \"%s\"\n", tpfmt);            \
  52                                                                         \
  53         return ret;                                                     \
  54 }
  55