[PATCH 10/18] perf record: Prepare picking perf_event_mmap_page from multiple evlists

[Arnaldo Carvalho de Melo]

From: Wang Nan <wangnan0@xxxxxxxxxx>

Following commits introduce new evlists to record. This patch adjusts
record__pick_pc() and introduces perf_evlist__pick_pc() to read control
page from one specific evlist. record__pick_pc() will be improved to
search control page from multiple evlists.

Signed-off-by: Wang Nan <wangnan0@xxxxxxxxxx>
Cc: He Kuang <hekuang@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Nilay Vaish <nilayvaish@xxxxxxxxx>
Cc: Zefan Li <lizefan@xxxxxxxxxx>
Cc: pi3orama@xxxxxxx
Link: http://lkml.kernel.org/r/1467023052-146749-4-git-send-email-wangnan0@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/builtin-record.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 18e9abc90759..b2b3b600adf5 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -686,10 +686,21 @@ perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused
 	return 0;
 }
 
+static const struct perf_event_mmap_page *
+perf_evlist__pick_pc(struct perf_evlist *evlist)
+{
+	if (evlist && evlist->mmap && evlist->mmap[0].base)
+		return evlist->mmap[0].base;
+	return NULL;
+}
+
 static const struct perf_event_mmap_page *record__pick_pc(struct record *rec)
 {
-	if (rec->evlist && rec->evlist->mmap && rec->evlist->mmap[0].base)
-		return rec->evlist->mmap[0].base;
+	const struct perf_event_mmap_page *pc;
+
+	pc = perf_evlist__pick_pc(rec->evlist);
+	if (pc)
+		return pc;
 	return NULL;
 }
 
-- 
2.7.4