linux-kernel - [PATCH tip 1/1] perf_counter tools: Fix off-by-one bug in symbol_

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Message-ID: <20090603174921.GG7805@ghostprotocols.net>
Date:	Wed, 3 Jun 2009 14:49:21 -0300
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH tip 1/1] 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>

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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