This is a note to let you know that I've just added the patch titled
perf report: Fix a no annotate browser displayed issue
to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: perf-report-fix-a-no-annotate-browser-displayed-issue.patch and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Mon Apr 9 10:16:32 CEST 2018
From: Jin Yao yao.jin@linux.intel.com Date: Tue, 26 Dec 2017 18:42:43 +0800 Subject: perf report: Fix a no annotate browser displayed issue
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 return directly.
notes = 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@linux.int... Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/perf/builtin-report.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-)
--- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -162,12 +162,28 @@ static int hist_iter__branch_callback(st struct hist_entry *he = iter->he; struct report *rep = arg; struct branch_info *bi; + struct perf_sample *sample = iter->sample; + struct perf_evsel *evsel = iter->evsel; + int err; + + if (!ui__has_annotation()) + return 0; + + hist__account_cycles(sample->branch_stack, al, sample, + rep->nonany_branch_mode);
bi = he->branch_info; + err = addr_map_symbol__inc_samples(&bi->from, sample, evsel->idx); + if (err) + goto out; + + err = addr_map_symbol__inc_samples(&bi->to, sample, evsel->idx); + branch_type_count(&rep->brtype_stat, &bi->flags, bi->from.addr, bi->to.addr);
- return 0; +out: + return err; }
static int process_sample_event(struct perf_tool *tool,
Patches currently in stable-queue which might be from yao.jin@linux.intel.com are
queue-4.15/perf-report-fix-a-no-annotate-browser-displayed-issue.patch