linux-kernel - [tip:perf/core] perf tools: Introduce xzalloc() for detecting out of memory conditions

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Date:	Wed, 17 Mar 2010 11:27:35 GMT
From:	tip-bot for Masami Hiramatsu <mhiramat@...hat.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, paulus@...ba.org, acme@...hat.com,
	hpa@...or.com, mingo@...hat.com, a.p.zijlstra@...llo.nl,
	efault@....de, dle-develop@...ts.sourceforge.net,
	fweisbec@...il.com, tglx@...utronix.de, mhiramat@...hat.com,
	mingo@...e.hu, systemtap@...rces.redhat.com
Subject: [tip:perf/core] perf tools: Introduce xzalloc() for detecting out of memory conditions

Commit-ID:  a1d37d5285bcda07f9c0b80a2634ca20ab545297
Gitweb:     http://git.kernel.org/tip/a1d37d5285bcda07f9c0b80a2634ca20ab545297
Author:     Masami Hiramatsu <mhiramat@...hat.com>
AuthorDate: Tue, 16 Mar 2010 18:05:21 -0400
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Wed, 17 Mar 2010 11:32:29 +0100

perf tools: Introduce xzalloc() for detecting out of memory conditions

Introducing xzalloc() which wrapping zalloc() for detecting out
of memory conditions.

Signed-off-by: Masami Hiramatsu <mhiramat@...hat.com>
Cc: systemtap <systemtap@...rces.redhat.com>
Cc: DLE <dle-develop@...ts.sourceforge.net>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Mike Galbraith <efault@....de>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
LKML-Reference: <20100316220521.32050.85155.stgit@...alhost6.localdomain6>
[ -v2: small cleanups in surrounding code ]
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 tools/perf/util/util.h |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 0f5b2a6..5270108 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -295,6 +295,13 @@ extern void *xmemdupz(const void *data, size_t len);
 extern char *xstrndup(const char *str, size_t len);
 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
 
+static inline void *xzalloc(size_t size)
+{
+	void *buf = xmalloc(size);
+
+	return memset(buf, 0, size);
+}
+
 static inline void *zalloc(size_t size)
 {
 	return calloc(1, size);
@@ -309,6 +316,7 @@ static inline int has_extension(const char *filename, const char *ext)
 {
 	size_t len = strlen(filename);
 	size_t extlen = strlen(ext);
+
 	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
 }
 
@@ -322,6 +330,7 @@ static inline int has_extension(const char *filename, const char *ext)
 #undef isalnum
 #undef tolower
 #undef toupper
+
 extern unsigned char sane_ctype[256];
 #define GIT_SPACE		0x01
 #define GIT_DIGIT		0x02
--
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