tracing/filter: Add startup tests for events filter

Adding automated tests running as late_initcall. Tests are
compiled in with CONFIG_FTRACE_STARTUP_TEST option.

Adding test event "ftrace_test_filter" used to simulate
filter processing during event occurance.

String filters are compiled and tested against several
test events with different values.

Also testing that evaluation of explicit predicates is ommited
due to the lazy filter evaluation.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1313072754-4620-11-git-send-email-jolsa@redhat.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 2eb3cf6d37bc..4c7540ad5dcb 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -762,6 +762,9 @@ struct filter_pred {
         u64                     val;
         struct regex            regex;
         unsigned short          *ops;
+#ifdef CONFIG_FTRACE_STARTUP_TEST
+        struct ftrace_event_field *field;
+#endif
         int                     offset;
         int                     not;
         int                     op;