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_MAP(console,
  13
  14         printk_console,
  15
  16         TP_PROTO(const char *text, size_t len),
  17
  18         TP_ARGS(text, len),
  19
  20         TP_STRUCT__entry(
  21                 __dynamic_array_text(char, msg, len)
  22         ),
  23
  24         TP_fast_assign(
  25                 tp_memcpy_dyn(msg, text)
  26         ),
  27
  28         TP_printk("%s", __get_str(msg))
  29 )
  30
  31 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,5,0))
  32
  33 LTTNG_TRACEPOINT_EVENT_CONDITION_MAP(console,
  34
  35         printk_console,
  36
  37         TP_PROTO(const char *log_buf, unsigned start, unsigned end,
  38                  unsigned log_buf_len),
  39
  40         TP_ARGS(log_buf, start, end, log_buf_len),
  41
  42         TP_CONDITION(start != end),
  43
  44         TP_STRUCT__entry(
  45                 __dynamic_array_text(char, msg, end - start)
  46         ),
  47
  48         TP_fast_assign(
  49                 tp_memcpy_dyn(msg, log_buf + start)
  50         ),
  51
  52         TP_printk("%s", __get_str(msg))
  53 )
  54
  55 #else /* (LINUX_VERSION_CODE < KERNEL_VERSION(3,5,0)) */
  56
  57 LTTNG_TRACEPOINT_EVENT_CONDITION_MAP(console,
  58
  59         printk_console,
  60
  61         TP_PROTO(const char *log_buf, unsigned start, unsigned end,
  62                  unsigned log_buf_len),
  63
  64         TP_ARGS(log_buf, start, end, log_buf_len),
  65
  66         TP_CONDITION(start != end),
  67
  68         TP_STRUCT__entry(
  69                 __dynamic_array_text_2(char, msg,
  70                         (start & (log_buf_len - 1)) > (end & (log_buf_len - 1))
  71                                 ? log_buf_len - (start & (log_buf_len - 1))
  72                                 : end - start,
  73                         (start & (log_buf_len - 1)) > (end & (log_buf_len - 1))
  74                                 ? end & (log_buf_len - 1)
  75                                 : 0)
  76         ),
  77
  78         TP_fast_assign(
  79                 tp_memcpy_dyn_2(msg,
  80                         log_buf + (start & (log_buf_len - 1)),
  81                         log_buf)
  82         ),
  83
  84         TP_printk("%s", __get_str(msg))
  85 )
  86
  87 #endif
  88
  89 #endif /* LTTNG_TRACE_PRINTK_H */
  90
  91 /* This part must be outside protection */
  92 #include "../../../probes/define_trace.h"