linux/include/trace/events/printk.h
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   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
   9TRACE_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>
  42
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