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

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

[Arnaldo Carvalho de Melo]

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@redhat.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);
 	}
 

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

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  18374ab76e3ec1cf1b0ca5a8d08e35cfc5d01669
Gitweb:     http://git.kernel.org/tip/18374ab76e3ec1cf1b0ca5a8d08e35cfc5d01669
Author:     Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Wed, 3 Jun 2009 14:49:21 -0300
Committer:  Ingo Molnar <mingo@elte.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@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <20090603174921.GG7805@ghostprotocols.net>
Signed-off-by: Ingo Molnar <mingo@elte.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);
 	}