linux-kernel - [tip:perf/core] perf tools: Use asprintf instead of malloc plus snprintf

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Date:	Tue, 10 Dec 2013 01:15:37 -0800
From:	tip-bot for Adrian Hunter <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, eranian@...gle.com, mingo@...hat.com,
	mingo@...nel.org, a.p.zijlstra@...llo.nl, efault@....de,
	jolsa@...hat.com, fweisbec@...il.com, ak@...ux.intel.com,
	dsahern@...il.com, tglx@...utronix.de, hpa@...or.com,
	paulus@...ba.org, linux-kernel@...r.kernel.org, namhyung@...il.com,
	adrian.hunter@...el.com
Subject: [tip:perf/core] perf tools:
  Use asprintf instead of malloc plus snprintf

Commit-ID:  d88938ebc97df72320609b33aa0cf9a9a98accb1
Gitweb:     http://git.kernel.org/tip/d88938ebc97df72320609b33aa0cf9a9a98accb1
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Tue, 3 Dec 2013 09:23:06 +0200
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 4 Dec 2013 13:46:36 -0300

perf tools: Use asprintf instead of malloc plus snprintf

The asprintf library function is equivalent to malloc plus snprintf so
use it because it is simpler.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Mike Galbraith <efault@....de>
Cc: Namhyung Kim <namhyung@...il.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/r/1386055390-13757-4-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/srcline.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
index d11aefb..4c8e816 100644
--- a/tools/perf/util/srcline.c
+++ b/tools/perf/util/srcline.c
@@ -227,7 +227,6 @@ char *get_srcline(struct dso *dso, unsigned long addr)
 	unsigned line = 0;
 	char *srcline;
 	char *dso_name = dso->long_name;
-	size_t size;
 
 	if (!dso->has_srcline)
 		return SRCLINE_UNKNOWN;
@@ -241,13 +240,7 @@ char *get_srcline(struct dso *dso, unsigned long addr)
 	if (!addr2line(dso_name, addr, &file, &line))
 		goto out;
 
-	/* just calculate actual length */
-	size = snprintf(NULL, 0, "%s:%u", file, line) + 1;
-
-	srcline = malloc(size);
-	if (srcline)
-		snprintf(srcline, size, "%s:%u", file, line);
-	else
+	if (asprintf(&srcline, "%s:%u", file, line) < 0)
 		srcline = SRCLINE_UNKNOWN;
 
 	free(file);
--
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