instrumentation/events/lttng-module/printk.h

   1 #undef TRACE_SYSTEM
   2 #define TRACE_SYSTEM printk
   3
   4 #if !defined(LTTNG_TRACE_PRINTK_H) || defined(TRACE_HEADER_MULTI_READ)
   5 #define LTTNG_TRACE_PRINTK_H
   6
   7 #include "../../../probes/lttng-tracepoint-event.h"
   8 #include <linux/version.h>
   9
  10 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0))
  11
  12 LTTNG_TRACEPOINT_EVENT(console,
  13         TP_PROTO(const char *text, size_t len),
  14
  15         TP_ARGS(text, len),
  16
  17         TP_STRUCT__entry(
  18                 __dynamic_array_text(char, msg, len)
  19         ),
  20
  21         TP_fast_assign(
  22                 tp_memcpy_dyn(msg, text)
  23         ),
  24
  25         TP_printk("%s", __get_str(msg))
  26 )
  27
  28 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,5,0))
  29
  30 LTTNG_TRACEPOINT_EVENT_CONDITION(console,
  31         TP_PROTO(const char *log_buf, unsigned start, unsigned end,
  32                  unsigned log_buf_len),
  33
  34         TP_ARGS(log_buf, start, end, log_buf_len),
  35
  36         TP_CONDITION(start != end),
  37
  38         TP_STRUCT__entry(
  39                 __dynamic_array_text(char, msg, end - start)
  40         ),
  41
  42         TP_fast_assign(
  43                 tp_memcpy_dyn(msg, log_buf + start)
  44         ),
  45
  46         TP_printk("%s", __get_str(msg))
  47 )
  48
  49 #else /* (LINUX_VERSION_CODE < KERNEL_VERSION(3,5,0)) */
  50
  51 LTTNG_TRACEPOINT_EVENT_CONDITION(console,
  52         TP_PROTO(const char *log_buf, unsigned start, unsigned end,
  53                  unsigned log_buf_len),
  54
  55         TP_ARGS(log_buf, start, end, log_buf_len),
  56
  57         TP_CONDITION(start != end),
  58
  59         TP_STRUCT__entry(
  60                 __dynamic_array_text_2(char, msg,
  61                         (start & (log_buf_len - 1)) > (end & (log_buf_len - 1))
  62                                 ? log_buf_len - (start & (log_buf_len - 1))
  63                                 : end - start,
  64                         (start & (log_buf_len - 1)) > (end & (log_buf_len - 1))
  65                                 ? end & (log_buf_len - 1)
  66                                 : 0)
  67         ),
  68
  69         TP_fast_assign(
  70                 tp_memcpy_dyn_2(msg,
  71                         log_buf + (start & (log_buf_len - 1)),
  72                         log_buf)
  73         ),
  74
  75         TP_printk("%s", __get_str(msg))
  76 )
  77
  78 #endif
  79
  80 #endif /* LTTNG_TRACE_PRINTK_H */
  81
  82 /* This part must be outside protection */
  83 #include "../../../probes/define_trace.h"