linux-kernel - [PATCH v5 10/23] perf session: Add an env pointer for the current perf

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Message-ID: <20250628045017.1361563-11-irogers@google.com>
Date: Fri, 27 Jun 2025 21:50:04 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, John Garry <john.g.garry@...cle.com>, 
	Will Deacon <will@...nel.org>, James Clark <james.clark@...aro.org>, 
	Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>, 
	"Masami Hiramatsu (Google)" <mhiramat@...nel.org>, Ravi Bangoria <ravi.bangoria@....com>, 
	Charlie Jenkins <charlie@...osinc.com>, Colin Ian King <colin.i.king@...il.com>, 
	Andi Kleen <ak@...ux.intel.com>, Dmitry Vyukov <dvyukov@...gle.com>, 
	Graham Woodward <graham.woodward@....com>, Ilkka Koskinen <ilkka@...amperecomputing.com>, 
	Zhongqiu Han <quic_zhonhan@...cinc.com>, Yicong Yang <yangyicong@...ilicon.com>, 
	Athira Rajeev <atrajeev@...ux.ibm.com>, Kajol Jain <kjain@...ux.ibm.com>, 
	Li Huafei <lihuafei1@...wei.com>, "Steinar H. Gunderson" <sesse@...gle.com>, 
	Stephen Brennan <stephen.s.brennan@...cle.com>, Chun-Tse Shao <ctshao@...gle.com>, 
	Yujie Liu <yujie.liu@...el.com>, "Dr. David Alan Gilbert" <linux@...blig.org>, Levi Yun <yeoreum.yun@....com>, 
	Howard Chu <howardchu95@...il.com>, Weilin Wang <weilin.wang@...el.com>, 
	Thomas Falcon <thomas.falcon@...el.com>, Matt Fleming <matt@...dmodwrite.com>, 
	Veronika Molnarova <vmolnaro@...hat.com>, 
	"Krzysztof Łopatowski" <krzysztof.m.lopatowski@...il.com>, Zixian Cai <fzczx123@...il.com>, 
	Steve Clevenger <scclevenger@...amperecomputing.com>, Ben Gainey <ben.gainey@....com>, 
	Chaitanya S Prakash <chaitanyas.prakash@....com>, Martin Liska <martin.liska@....com>, 
	"Martin Liška" <m.liska@...link.cz>, Song Liu <song@...nel.org>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v5 10/23] perf session: Add an env pointer for the current perf_env

Initialize to `&header.env`. This will later allow the env value to be
changed.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/session.c | 3 ++-
 tools/perf/util/session.h | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index b09d157f7d04..e39a1df7c044 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -156,6 +156,7 @@ struct perf_session *__perf_session__new(struct perf_data *data,
 			     ordered_events__deliver_event, NULL);
 
 	perf_env__init(&session->header.env);
+	session->env = &session->header.env;
 	if (data) {
 		ret = perf_data__open(data);
 		if (ret < 0)
@@ -2750,5 +2751,5 @@ int perf_session__dsos_hit_all(struct perf_session *session)
 
 struct perf_env *perf_session__env(struct perf_session *session)
 {
-	return &session->header.env;
+	return session->env;
 }
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index e7f7464b838f..088868f1004a 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -45,6 +45,8 @@ struct perf_session {
 	struct perf_header	header;
 	/** @machines: Machines within the session a host and 0 or more guests. */
 	struct machines		machines;
+	/** @env: The perf_env being worked with, either from a data file or the host's. */
+	struct perf_env		*env;
 	/** @evlist: List of evsels/events of the session. */
 	struct evlist	*evlist;
 	/** @auxtrace: callbacks to allow AUX area data decoding. */
-- 
2.50.0.727.gbf7dc18ff4-goog