linux-kernel - [PATCH 0/2] tracing: Fix print

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Message-Id: <20230419214140.4158-1-beaub@linux.microsoft.com>
Date:   Wed, 19 Apr 2023 14:41:38 -0700
From:   Beau Belgrave <beaub@...ux.microsoft.com>
To:     rostedt@...dmis.org, mhiramat@...nel.org,
        dcook@...ux.microsoft.com, alanau@...ux.microsoft.com
Cc:     linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org
Subject: [PATCH 0/2] tracing: Fix print_fields() and use best filter

When using user_events along with the new print_fields() functionality
a few issues were discovered. When printing out fields, the __rel_loc
field types were printing out the wrong array values. Also, user_events
wasn't setting the best filter type, so __rel_loc data was marked as
FILTER_OTHER vs FILTER_RDYN_STRING when chars were used. This resulted
in strings being printed out as array of bytes vs a string.

After applying this series user_events will output strings correctly
for __rel_loc via /sys/kernel/tracing/trace outputs. All events that
utilize print_fields() will print the correct array/string for
__data_loc and __rel_loc data, when it's enabled.

Beau Belgrave (2):
  tracing/user_events: Set event filter_type from type
  tracing: Fix print_fields() for __dyn_loc/__rel_loc

 kernel/trace/trace_events_user.c |  3 +++
 kernel/trace/trace_output.c      | 10 ++++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

base-commit: 88fe1ec75fcb296579e05eaf3807da3ee83137e4
-- 
2.25.1