instrumentation/events/mainline/printk.h

   1 #undef TRACE_SYSTEM
   2 #define TRACE_SYSTEM printk
   3
   4 #if !defined(_TRACE_PRINTK_H) || defined(TRACE_HEADER_MULTI_READ)
   5 #define _TRACE_PRINTK_H
   6
   7 #include <linux/tracepoint.h>
   8
   9 TRACE_EVENT_CONDITION(console,
  10         TP_PROTO(const char *log_buf, unsigned start, unsigned end,
  11                  unsigned log_buf_len),
  12
  13         TP_ARGS(log_buf, start, end, log_buf_len),
  14
  15         TP_CONDITION(start != end),
  16
  17         TP_STRUCT__entry(
  18                 __dynamic_array(char, msg, end - start + 1)
  19         ),
  20
  21         TP_fast_assign(
  22                 if ((start & (log_buf_len - 1)) > (end & (log_buf_len - 1))) {
  23                         memcpy(__get_dynamic_array(msg),
  24                                log_buf + (start & (log_buf_len - 1)),
  25                                log_buf_len - (start & (log_buf_len - 1)));
  26                         memcpy((char *)__get_dynamic_array(msg) +
  27                                log_buf_len - (start & (log_buf_len - 1)),
  28                                log_buf, end & (log_buf_len - 1));
  29                 } else
  30                         memcpy(__get_dynamic_array(msg),
  31                                log_buf + (start & (log_buf_len - 1)),
  32                                end - start);
  33                 ((char *)__get_dynamic_array(msg))[end - start] = 0;
  34         ),
  35
  36         TP_printk("%s", __get_str(msg))
  37 );
  38 #endif /* _TRACE_PRINTK_H */
  39
  40 /* This part must be outside protection */
  41 #include <trace/define_trace.h>