parse-event: Fix parsing of __print_flags() in TP_printk()

A update is made to the sched:sched_switch event that adds some
logic to the first parameter of the __print_flags() that shows the
state of tasks. This change cause trace-cmd to fail parsing the flags.

A simple fix is needed to have the parser be able to process ops
within the argument.

Reported-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/parse-events.c b/parse-events.c
index 2dbd47b..ce95e6e 100644
--- a/parse-events.c
+++ b/parse-events.c
@@ -2167,6 +2167,11 @@ process_flags(struct event_format *event, struct print_arg *arg, char **tok)
         field = alloc_arg();
 
         type = process_arg(event, field, &token);
+
+        /* Handle operations in the first argument */
+        while (type == EVENT_OP)
+                type = process_op(event, field, &token);
+
         if (test_type_token(type, token, EVENT_DELIM, ","))
                 goto out_free;
         free_token(token);