| 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 | #include <linux/version.h> |
| 9 | |
| 10 | #define MSG_TRACE_MAX_LEN 2048 |
| 11 | |
| 12 | TRACE_EVENT_CONDITION(console, |
| 13 | TP_PROTO(const char *log_buf, unsigned start, unsigned end, |
| 14 | unsigned log_buf_len), |
| 15 | |
| 16 | TP_ARGS(log_buf, start, end, log_buf_len), |
| 17 | |
| 18 | TP_CONDITION(start != end), |
| 19 | |
| 20 | TP_STRUCT__entry( |
| 21 | __dynamic_array_text(char, msg, |
| 22 | min_t(unsigned, end - start, MSG_TRACE_MAX_LEN) + 1) |
| 23 | ), |
| 24 | |
| 25 | TP_fast_assign( |
| 26 | tp_memcpy_dyn(msg, |
| 27 | ({ |
| 28 | char lmsg[MSG_TRACE_MAX_LEN + 1]; |
| 29 | |
| 30 | if ((end - start) > MSG_TRACE_MAX_LEN) |
| 31 | start = end - MSG_TRACE_MAX_LEN; |
| 32 | |
| 33 | #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,5,0)) |
| 34 | if ((start & (log_buf_len - 1)) > |
| 35 | (end & (log_buf_len - 1))) { |
| 36 | memcpy(lmsg, |
| 37 | log_buf + |
| 38 | (start & (log_buf_len - 1)), |
| 39 | log_buf_len - |
| 40 | (start & (log_buf_len - 1))); |
| 41 | memcpy(lmsg + log_buf_len - |
| 42 | (start & (log_buf_len - 1)), |
| 43 | log_buf, |
| 44 | end & (log_buf_len - 1)); |
| 45 | } else |
| 46 | memcpy(lmsg, |
| 47 | log_buf + |
| 48 | (start & (log_buf_len - 1)), |
| 49 | end - start); |
| 50 | #else |
| 51 | memcpy(lmsg, log_buf + start, end - start); |
| 52 | #endif |
| 53 | lmsg[end - start] = 0; |
| 54 | lmsg; |
| 55 | }) |
| 56 | ) |
| 57 | ), |
| 58 | |
| 59 | TP_printk("%s", __get_str(msg)) |
| 60 | ) |
| 61 | #endif /* _TRACE_PRINTK_H */ |
| 62 | |
| 63 | /* This part must be outside protection */ |
| 64 | #include "../../../probes/define_trace.h" |