linux-kernel - [tip:perf/core] perf trace: Don' t supress zeroed args when there is an strarray entry for it

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Message-ID: <tip-6hnoqsjh99t4hxi3xu2nlwep@git.kernel.org>
Date:	Mon, 14 Oct 2013 22:27:32 -0700
From:	tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, eranian@...gle.com, paulus@...ba.org,
	acme@...hat.com, hpa@...or.com, mingo@...nel.org,
	peterz@...radead.org, efault@....de, jolsa@...hat.com,
	fweisbec@...il.com, adrian.hunter@...el.com, dsahern@...il.com,
	tglx@...utronix.de
Subject: [tip:perf/core] perf trace: Don'
 t supress zeroed args when there is an strarray entry for it

Commit-ID:  4aa5823225c70efba758750029504807cd30b925
Gitweb:     http://git.kernel.org/tip/4aa5823225c70efba758750029504807cd30b925
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Fri, 20 Sep 2013 12:19:41 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 9 Oct 2013 17:41:02 -0300

perf trace: Don't supress zeroed args when there is an strarray entry for it

Case in hand:

   9.682 ( 0.001 ms): Xorg/13079 setitimer(which: REAL, value: 0x7fffede42470) = 0

ITIMER_REAL is zero.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-6hnoqsjh99t4hxi3xu2nlwep@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-trace.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 8855207..27b0ec8 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -940,8 +940,15 @@ static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
 		     field = field->next, ++arg.idx, bit <<= 1) {
 			if (arg.mask & bit)
 				continue;
-
-			if (args[arg.idx] == 0)
+			/*
+ 			 * Suppress this argument if its value is zero and
+ 			 * and we don't have a string associated in an
+ 			 * strarray for it.
+ 			 */
+			if (args[arg.idx] == 0 &&
+			    !(sc->arg_scnprintf &&
+			      sc->arg_scnprintf[arg.idx] == SCA_STRARRAY &&
+			      sc->arg_parm[arg.idx]))
 				continue;
 
 			printed += scnprintf(bf + printed, size - printed,
--
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