[PATCH V7 4/8] perf,tools: add backpointer for perf_env to evlist

[Kan Liang <kan.liang@intel.com>]

From: Kan Liang <kan.liang@intel.com>

Add backpointer to evlist, so we can easily access env when processing
something where we have a evsel or evlist.

Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Kan Liang <kan.liang@intel.com>
---
 tools/perf/util/evlist.h | 1 +
 tools/perf/util/header.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 436e358..b39a619 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -56,6 +56,7 @@ struct perf_evlist {
 	struct cpu_map	  *cpus;
 	struct perf_evsel *selected;
 	struct events_stats stats;
+	struct perf_env	*env;
 };
 
 struct perf_evsel_str_handler {
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 8df0582..c3c79cb 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2576,6 +2576,7 @@ int perf_session__read_header(struct perf_session *session)
 	if (session->evlist == NULL)
 		return -ENOMEM;
 
+	session->evlist->env = &header->env;
 	if (perf_data_file__is_pipe(file))
 		return perf_header__read_pipe(session);
 
-- 
1.8.3.1