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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "stable@vger.kernel.org" <stable@vger.kernel.org>
CC:     Jin Yao <yao.jin@linux.intel.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Andi Kleen <ak@linux.intel.com>, Jiri Olsa <jolsa@kernel.org>,
        Kan Liang <kan.liang@intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Arnaldo Carvalho de Melo <acme@redhat.com>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 4.15 065/124] perf report: Fix a no annotate
 browser displayed issue
Thread-Topic: [PATCH AUTOSEL for 4.15 065/124] perf report: Fix a no annotate
 browser displayed issue
Thread-Index: AQHTv5mu+smBbtg5GE+h/A64dYLJSA==
Date:   Mon, 19 Mar 2018 15:48:10 +0000
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From: Jin Yao <yao.jin@linux.intel.com>

[ Upstream commit 40c39e3046411f84bab82f66783ff3593e2bcd9b ]

When enabling '-b' option in perf record, for example,

  perf record -b ...
  perf report

and then browsing the annotate browser from perf report (press 'A'), it
would fail (annotate browser can't be displayed).

It's because the '.add_entry_cb' op of struct report is overwritten by
hist_iter__branch_callback() in builtin-report.c. But this function doesn't=
 do
something like mapping symbols and sources. So next, do_annotate() will ret=
urn
directly.

        notes =3D symbol__annotation(act->ms.sym);
        if (!notes->src)
                return 0;

This patch adds the lost code to hist_iter__branch_callback (refer to
hist_iter__report_callback).

v2:

Fix a crash bug when perform 'perf report --stdio'.

The reason is that we init the symbol annotation only in browser mode, it
doesn't allocate/init resources for stdio mode.

So now in hist_iter__branch_callback(), it will return directly if it's not=
 in
browser mode.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1514284963-18587-1-git-send-email-yao.jin@li=
nux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 tools/perf/builtin-report.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index af5dd038195e..0551a69bd4a5 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -162,12 +162,28 @@ static int hist_iter__branch_callback(struct hist_ent=
ry_iter *iter,
 	struct hist_entry *he =3D iter->he;
 	struct report *rep =3D arg;
 	struct branch_info *bi;
+	struct perf_sample *sample =3D iter->sample;
+	struct perf_evsel *evsel =3D iter->evsel;
+	int err;
+
+	if (!ui__has_annotation())
+		return 0;
+
+	hist__account_cycles(sample->branch_stack, al, sample,
+			     rep->nonany_branch_mode);
=20
 	bi =3D he->branch_info;
+	err =3D addr_map_symbol__inc_samples(&bi->from, sample, evsel->idx);
+	if (err)
+		goto out;
+
+	err =3D addr_map_symbol__inc_samples(&bi->to, sample, evsel->idx);
+
 	branch_type_count(&rep->brtype_stat, &bi->flags,
 			  bi->from.addr, bi->to.addr);
=20
-	return 0;
+out:
+	return err;
 }
=20
 static int process_sample_event(struct perf_tool *tool,
--=20
2.14.1