trace-cmd: Add --check-events to report

Add a new option --check-events to the report target which makes sure
that the event formats in the trace data file can be parsed correctly on
the machine that trace-cmd is running on. It returns EINVAL(22) for
parsing failures and 0 for success.

Cc: Michael Rubin <mrubin@google.com>
Cc: David Sharp <dhsharp@google.com>
Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@google.com>
Link: http://lkml.kernel.org/r/1313091459-12049-4-git-send-email-vnagarnaik@google.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 10 insertions, 6 deletions

diff --git a/trace-input.c b/trace-input.c
index 723d47f..8c2b858 100644
--- a/trace-input.c
+++ b/trace-input.c
@@ -342,10 +342,12 @@ static int read_ftrace_file(struct tracecmd_input *handle,
                 return -1;
         }
 
-        if (print)
+        if (print) {
                 printf("%.*s\n", (int)size, buf);
-        else
-                pevent_parse_event(pevent, buf, size, "ftrace");
+        } else {
+                if (pevent_parse_event(pevent, buf, size, "ftrace"))
+                        pevent->parsing_failures = 1;
+        }
         free(buf);
 
         return 0;
@@ -367,10 +369,12 @@ static int read_event_file(struct tracecmd_input *handle,
                 return -1;
         }
 
-        if (print)
+        if (print) {
                 printf("%.*s\n", (int)size, buf);
-        else
-                pevent_parse_event(pevent, buf, size, system);
+        } else {
+                if (pevent_parse_event(pevent, buf, size, system))
+                        pevent->parsing_failures = 1;
+        }
         free(buf);
 
         return 0;