linux-kernel - [tip:perf/core] perf tools: Fix annotation with kcore

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Message-ID: <tip-ee205503f2333d639550eaed37abb455733510a3@git.kernel.org>
Date:	Wed, 19 Nov 2014 23:37:41 -0800
From:	tip-bot for Adrian Hunter <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	dsahern@...il.com, tglx@...utronix.de, peterz@...radead.org,
	adrian.hunter@...el.com, jolsa@...hat.com, mingo@...nel.org,
	eranian@...gle.com, hpa@...or.com, fweisbec@...il.com,
	paulus@...ba.org, linux-kernel@...r.kernel.org, acme@...hat.com,
	namhyung@...il.com
Subject: [tip:perf/core] perf tools: Fix annotation with kcore

Commit-ID:  ee205503f2333d639550eaed37abb455733510a3
Gitweb:     http://git.kernel.org/tip/ee205503f2333d639550eaed37abb455733510a3
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Tue, 11 Nov 2014 12:04:54 +0200
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 19 Nov 2014 12:33:47 -0300

perf tools: Fix annotation with kcore

Patch "perf tools: Fix build-id matching on vmlinux" breaks annotation
with kcore.  The problem is that symbol__annotate() first gets the
filename based on the build-id which was previously not set.

This patch provides a quick fix, however there should probably be only
one way to determine the filename. e.g.  symbol__annotate() should use
the same way as dso__data_fd().

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...il.com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/r/1415700294-30816-1-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/annotate.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 7dabde1..873c877 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -915,6 +915,8 @@ int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize)
 			return -ENOMEM;
 		}
 		goto fallback;
+	} else if (dso__is_kcore(dso)) {
+		goto fallback;
 	} else if (readlink(symfs_filename, command, sizeof(command)) < 0 ||
 		   strstr(command, "[kernel.kallsyms]") ||
 		   access(symfs_filename, R_OK)) {
--
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