linux-kernel - [tip:perf/urgent] perf symbols: Fix vmlinux path when not using --symfs

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Message-ID: <tip-a639dc64e52183a361c260e562e73b0800b89072@git.kernel.org>
Date:	Tue, 1 Mar 2011 08:55:51 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, eranian@...gle.com, paulus@...ba.org,
	acme@...hat.com, hpa@...or.com, mingo@...hat.com,
	tzanussi@...il.com, peterz@...radead.org, efault@....de,
	fweisbec@...il.com, tglx@...utronix.de, daahern@...co.com,
	mingo@...e.hu
Subject: [tip:perf/urgent] perf symbols: Fix vmlinux path when not using --symfs

Commit-ID:  a639dc64e52183a361c260e562e73b0800b89072
Gitweb:     http://git.kernel.org/tip/a639dc64e52183a361c260e562e73b0800b89072
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Mon, 28 Feb 2011 13:54:38 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 28 Feb 2011 13:54:38 -0300

perf symbols: Fix vmlinux path when not using --symfs

The ec5761e cset introduced the symfs feature with a bug for loading vmlinux
files that ended up causing this failure:

[root@...lia v2.6.38-rc5+]# strace -e trace=open perf top --vmlinux ./vmlinux 2>&1 | tail -3
open("/./vmlinux", O_RDONLY)            = -1 ENOENT (No such file or directory)
./vmlinux with build id b9266bf40e98dadb5d43a2f3e95d3c5d4aff46dc not found, continuing without symbols
The ./vmlinux file can't be used
[root@...lia v2.6.38-rc5+]#

Remove the extra slash, just like is done in the DSO__ORIG_DSO handling in
dso__load() and other parts of the ec5761e cset.

Reported-by: Ingo Molnar <mingo@...e.hu>
Cc: David Ahern <daahern@...co.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Tom Zanussi <tzanussi@...il.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/symbol.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 7821d0e..b1bf490 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1836,7 +1836,7 @@ int dso__load_vmlinux(struct dso *self, struct map *map,
 	int err = -1, fd;
 	char symfs_vmlinux[PATH_MAX];
 
-	snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s/%s",
+	snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s",
 		 symbol_conf.symfs, vmlinux);
 	fd = open(symfs_vmlinux, O_RDONLY);
 	if (fd < 0)
--
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