[PATCH v3 16/23] trace-cmd: Add a new flag to disable any timestamp corrections

["Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>]

A new flag is added in the trace-cmd library for controlling events
timestamp corrections while reading a trace file. If the flag is set,
all timestamps are displayed as-is from the trace file.
   TRACECMD_FL_RAW_TS
The flag can be modified with these APIs:
  tracecmd_set_flag()
  tracecmd_clear_flag()

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 lib/trace-cmd/include/private/trace-cmd-private.h | 1 +
 lib/trace-cmd/trace-input.c                       | 9 +++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h
index c33d067a..fdca7494 100644
--- a/lib/trace-cmd/include/private/trace-cmd-private.h
+++ b/lib/trace-cmd/include/private/trace-cmd-private.h
@@ -134,6 +134,7 @@ enum {
 	TRACECMD_FL_IGNORE_DATE		= (1 << 0),
 	TRACECMD_FL_BUFFER_INSTANCE	= (1 << 1),
 	TRACECMD_FL_IN_USECS		= (1 << 2),
+	TRACECMD_FL_RAW_TS		= (1 << 3),
 };
 
 struct tracecmd_ftrace {
diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c
index 696e7bd8..27ddd8eb 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -1287,6 +1287,10 @@ static unsigned long long timestamp_host_sync(unsigned long long ts,
 static unsigned long long timestamp_calc(unsigned long long ts,
 					 struct tracecmd_input *handle)
 {
+	/* do not modify raw timestamps */
+	if (handle->flags & TRACECMD_FL_RAW_TS)
+		return ts;
+
 	/* Guest trace file, sync with host timestamps */
 	if (handle->host.sync_enable)
 		ts = timestamp_host_sync(ts, handle);
@@ -2601,7 +2605,8 @@ static int handle_options(struct tracecmd_input *handle)
 			 * gtod. It is stored as ASCII with '0x'
 			 * appended.
 			 */
-			if (handle->flags & TRACECMD_FL_IGNORE_DATE)
+			if (handle->flags &
+			    (TRACECMD_FL_IGNORE_DATE || TRACECMD_FL_RAW_TS))
 				break;
 			offset = strtoll(buf, NULL, 0);
 			/* Convert from micro to nano */
@@ -2707,7 +2712,7 @@ static int handle_options(struct tracecmd_input *handle)
 			trace_guest_load(handle, buf, size);
 			break;
 		case TRACECMD_OPTION_TSC2NSEC:
-			if (size < 16)
+			if (size < 16 || (handle->flags & TRACECMD_FL_RAW_TS))
 				break;
 			handle->tsc_calc.mult = tep_read_number(handle->pevent,
 								buf, 4);
-- 
2.30.2