include/trace/events/printk.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #undef TRACE_SYSTEM
   3 #define TRACE_SYSTEM printk
   4
   5 #if !defined(_TRACE_PRINTK_H) || defined(TRACE_HEADER_MULTI_READ)
   6 #define _TRACE_PRINTK_H
   7
   8 #include <linux/tracepoint.h>
   9
  10 TRACE_EVENT(console,
  11         TP_PROTO(const char *text, size_t len),
  12
  13         TP_ARGS(text, len),
  14
  15         TP_STRUCT__entry(
  16                 __dynamic_array(char, msg, len + 1)
  17         ),
  18
  19         TP_fast_assign(
  20                 /*
  21                  * Each trace entry is printed in a new line.
  22                  * If the msg finishes with '\n', cut it off
  23                  * to avoid blank lines in the trace.
  24                  */
  25                 if ((len > 0) && (text[len-1] == '\n'))
  26                         len -= 1;
  27
  28                 memcpy(__get_str(msg), text, len);
  29                 __get_str(msg)[len] = 0;
  30         ),
  31
  32         TP_printk("%s", __get_str(msg))
  33 );
  34 #endif /* _TRACE_PRINTK_H */
  35
  36 /* This part must be outside protection */
  37 #include <trace/define_trace.h>