X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=instrumentation%2Fevents%2Flttng-module%2Fprintk.h;h=b01ac59b22dcaf8a32b9a65020041f8ec6b2b0cd;hb=b78104db53f97c10add30016e365855a26f6e01e;hp=4c744f998f7115fd02813d887918bb558c96f242;hpb=b87700e318c27267890cbd6fb5e50b687279131b;p=lttng-modules.git

diff --git a/instrumentation/events/lttng-module/printk.h b/instrumentation/events/lttng-module/printk.h
index 4c744f99..b01ac59b 100644
--- 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>