Namespace kernel version macros

[lttng-modules.git] / instrumentation / events / lttng-module / printk.h

diff --git a/instrumentation/events/lttng-module/printk.h b/instrumentation/events/lttng-module/printk.h
index 4c744f998f7115fd02813d887918bb558c96f242..b01ac59b22dcaf8a32b9a65020041f8ec6b2b0cd 100644 (file)
--- a/instrumentation/events/lttng-module/printk.h
+++ b/instrumentation/events/lttng-module/printk.h
@@ -1,64 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM printk
 
-#if !defined(_TRACE_PRINTK_H) || defined(TRACE_HEADER_MULTI_READ)
-#define _TRACE_PRINTK_H
+#if !defined(LTTNG_TRACE_PRINTK_H) || defined(TRACE_HEADER_MULTI_READ)
+#define LTTNG_TRACE_PRINTK_H
 
-#include <linux/tracepoint.h>
-#include <linux/version.h>
+#include <probes/lttng-tracepoint-event.h>
+#include <lttng-kernel-version.h>
 
-#define MSG_TRACE_MAX_LEN      2048
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,10,0))
+
+LTTNG_TRACEPOINT_EVENT_MAP(console,
+
+       printk_console,
+
+       TP_PROTO(const char *text, size_t len),
+
+       TP_ARGS(text, len),
+
+       TP_FIELDS(
+               ctf_sequence_text(char, msg, text, size_t, len)
+       )
+)
+
+#elif (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,5,0))
+
+LTTNG_TRACEPOINT_EVENT_MAP(console,
+
+       printk_console,
 
-TRACE_EVENT_CONDITION(console,
        TP_PROTO(const char *log_buf, unsigned start, unsigned end,
                 unsigned log_buf_len),
 
        TP_ARGS(log_buf, start, end, log_buf_len),
 
-       TP_CONDITION(start != end),
-
-       TP_STRUCT__entry(
-               __dynamic_array_text(char, msg,
-                       min_t(unsigned, end - start, MSG_TRACE_MAX_LEN) + 1)
-       ),
-
-       TP_fast_assign(
-               tp_memcpy_dyn(msg,
-                       ({
-                               char lmsg[MSG_TRACE_MAX_LEN + 1];
-
-                               if ((end - start) > MSG_TRACE_MAX_LEN)
-                                       start = end - MSG_TRACE_MAX_LEN;
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,5,0))
-                               if ((start & (log_buf_len - 1)) >
-                                       (end & (log_buf_len - 1))) {
-                                       memcpy(lmsg,
-                                               log_buf +
-                                               (start & (log_buf_len - 1)),
-                                               log_buf_len -
-                                               (start & (log_buf_len - 1)));
-                                       memcpy(lmsg + log_buf_len -
-                                               (start & (log_buf_len - 1)),
-                                               log_buf,
-                                               end & (log_buf_len - 1));
-                               } else
-                                       memcpy(lmsg,
-                                               log_buf +
-                                               (start & (log_buf_len - 1)),
-                                               end - start);
-#else
-                               memcpy(lmsg, log_buf + start, end - start);
-#endif
-                               lmsg[end - start] = 0;
-                               lmsg;
-                       })
-               )
-       ),
+       TP_FIELDS(
+               ctf_sequence_text(char, msg, log_buf + start,
+                       size_t, end - start)
+       )
+)
 
-       TP_printk("%s", __get_str(msg))
+#else /* (LTTNG_LINUX_VERSION_CODE < LTTNG_KERNEL_VERSION(3,5,0)) */
+
+LTTNG_TRACEPOINT_EVENT_MAP(console,
+
+       printk_console,
+
+       TP_PROTO(const char *log_buf, unsigned start, unsigned end,
+                unsigned log_buf_len),
+
+       TP_ARGS(log_buf, start, end, log_buf_len),
+
+       TP_FIELDS(
+               /*
+                * printk buffer is gathered from two segments on older kernels.
+                */
+               ctf_sequence_text(char, msg1,
+                       log_buf + (start & (log_buf_len - 1)),
+                       size_t, (start & (log_buf_len - 1)) > (end & (log_buf_len - 1))
+                               ? log_buf_len - (start & (log_buf_len - 1))
+                               : end - start)
+               ctf_sequence_text(char, msg2,
+                       log_buf,
+                       size_t, (start & (log_buf_len - 1)) > (end & (log_buf_len - 1))
+                               ? end & (log_buf_len - 1)
+                               : 0)
+       )
 )
-#endif /* _TRACE_PRINTK_H */
+
+#endif
+
+#endif /* LTTNG_TRACE_PRINTK_H */
 
 /* This part must be outside protection */
-#include "../../../probes/define_trace.h"
+#include <probes/define_trace.h>