linux-kernel - [tip:perf/core] tools lib traceevent: If %s is a pointer, check printk formats

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Date:	Mon, 4 Nov 2013 12:22:42 -0800
From:	"tip-bot for Steven Rostedt (Red Hat)" <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, hpa@...or.com,
	mingo@...nel.org, namhyung@...nel.org, fweisbec@...il.com,
	rostedt@...dmis.org, akpm@...ux-foundation.org, tglx@...utronix.de
Subject: [tip:perf/core] tools lib traceevent: If %s is a pointer,
  check printk formats

Commit-ID:  0970b5f438261216afcd0ccaa2fcfffc83df7ca2
Gitweb:     http://git.kernel.org/tip/0970b5f438261216afcd0ccaa2fcfffc83df7ca2
Author:     Steven Rostedt (Red Hat) <rostedt@...dmis.org>
AuthorDate: Fri, 1 Nov 2013 17:53:55 -0400
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 4 Nov 2013 14:34:26 -0300

tools lib traceevent: If %s is a pointer, check printk formats

If the format string of TP_printk() contains a %s, and the argument is
not a string, check if the argument is a pointer that might match the
printk_formats that were stored.

Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Link: http://lkml.kernel.org/r/20131101215500.698924777@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/lib/traceevent/event-parse.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 856b791..013c8d3 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -3505,6 +3505,7 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
 	struct pevent *pevent = event->pevent;
 	struct print_flag_sym *flag;
 	struct format_field *field;
+	struct printk_map *printk;
 	unsigned long long val, fval;
 	unsigned long addr;
 	char *str;
@@ -3540,7 +3541,12 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
 		if (!(field->flags & FIELD_IS_ARRAY) &&
 		    field->size == pevent->long_size) {
 			addr = *(unsigned long *)(data + field->offset);
-			trace_seq_printf(s, "%lx", addr);
+			/* Check if it matches a print format */
+			printk = find_printk(pevent, addr);
+			if (printk)
+				trace_seq_puts(s, printk->printk);
+			else
+				trace_seq_printf(s, "%lx", addr);
 			break;
 		}
 		str = malloc(len + 1);
--
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