Ftrace instances should be created physically in the tracefs, before
trying to access its files. In record_trace() function, the call to
make_instances() should be before the logic which reads the instance's
tracing file.
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@xxxxxxxxx>
---
tracecmd/trace-record.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tracecmd/trace-record.c b/tracecmd/trace-record.c
index d8c24ebf..1e4d38fa 100644
--- a/tracecmd/trace-record.c
+++ b/tracecmd/trace-record.c
@@ -6222,6 +6222,8 @@ static void record_trace(int argc, char **argv,
if (!ctx->output)
ctx->output = DEFAULT_INPUT_FILE;
+ make_instances();
+
/* Save the state of tracing_on before starting */
for_all_instances(instance) {
instance->output_file = strdup(ctx->output);
@@ -6236,8 +6238,6 @@ static void record_trace(int argc, char **argv,
instance->tracing_on_init_val = 1;
}
- make_instances();
-
if (ctx->events)
expand_event_list();
--
2.25.4
|