linux-kernel - [tip:perfcounters/core] perf_counter tools: Fix off-by-one bug in symbol_

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Date:	Wed, 3 Jun 2009 19:48:33 GMT
From:	tip-bot for Arnaldo Carvalho de Melo <acme@...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, efault@....de,
	peterz@...radead.org, mtosatti@...hat.com, tglx@...utronix.de,
	cjashfor@...ux.vnet.ibm.com, mingo@...e.hu
Subject: [tip:perfcounters/core] perf_counter tools: Fix off-by-one bug in symbol__new

Commit-ID:  18374ab76e3ec1cf1b0ca5a8d08e35cfc5d01669
Gitweb:     http://git.kernel.org/tip/18374ab76e3ec1cf1b0ca5a8d08e35cfc5d01669
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Wed, 3 Jun 2009 14:49:21 -0300
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Wed, 3 Jun 2009 21:46:59 +0200

perf_counter tools: Fix off-by-one bug in symbol__new

The end is really (start + len - 1). Noticed when synthesizing
the PLT symbols, that are small (16 bytes), and hot on the
start RIP.

Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
LKML-Reference: <20090603174921.GG7805@...stprotocols.net>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 Documentation/perf_counter/util/symbol.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/Documentation/perf_counter/util/symbol.c b/Documentation/perf_counter/util/symbol.c
index d52a1ae..35ee6de 100644
--- a/Documentation/perf_counter/util/symbol.c
+++ b/Documentation/perf_counter/util/symbol.c
@@ -19,7 +19,7 @@ static struct symbol *symbol__new(uint64_t start, uint64_t len,
 			self = ((void *)self) + priv_size;
 		}
 		self->start = start;
-		self->end   = start + len;
+		self->end   = start + len - 1;
 		memcpy(self->name, name, namelen);
 	}
 
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