linux-kernel - [tip:perf/core] tools lib traceevent: Fix processing of dereferenced args in bprintk events

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Date:   Thu, 20 Dec 2018 10:00:13 -0800
From:   "tip-bot for Steven Rostedt (VMware)" <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, jolsa@...hat.com, rostedt@...dmis.org,
        linux-kernel@...r.kernel.org, mingo@...nel.org, acme@...hat.com,
        hpa@...or.com, namhyung@...nel.org
Subject: [tip:perf/core] tools lib traceevent: Fix processing of
 dereferenced args in bprintk events

Commit-ID:  f024cf085c423bac7512479f45c34ee9a24af7ce
Gitweb:     https://git.kernel.org/tip/f024cf085c423bac7512479f45c34ee9a24af7ce
Author:     Steven Rostedt (VMware) <rostedt@...dmis.org>
AuthorDate: Mon, 10 Dec 2018 13:45:22 -0500
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 18 Dec 2018 12:21:44 -0300

tools lib traceevent: Fix processing of dereferenced args in bprintk events

In the case that a bprintk event has a dereferenced pointer that is
stored as a string, and there's more values to process (more args), the
arg was not updated to point to the next arg after processing the
dereferenced pointer, and it screwed up what was to be displayed.

Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: linux-trace-devel@...r.kernel.org
Cc: stable@...r.kernel.org
Fixes: 37db96bb49629 ("tools lib traceevent: Handle new pointer processing of bprint strings")
Link: http://lkml.kernel.org/r/20181210134522.3f71e2ca@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/lib/traceevent/event-parse.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index a5ed291b8a9f..69a96e39f0ab 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -4973,6 +4973,7 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct tep_e
 
 				if (arg->type == TEP_PRINT_BSTRING) {
 					trace_seq_puts(s, arg->string.string);
+					arg = arg->next;
 					break;
 				}