linux-kernel - [PATCH 22/26] perf tools: Use machine__for_each_dso in perf_session__cache_build

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Message-Id: <20200913210313.1985612-23-jolsa@kernel.org>
Date:   Sun, 13 Sep 2020 23:03:09 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Michael Petlan <mpetlan@...hat.com>,
        Song Liu <songliubraving@...com>,
        "Frank Ch. Eigler" <fche@...hat.com>,
        Ian Rogers <irogers@...gle.com>,
        Stephane Eranian <eranian@...gle.com>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>
Subject: [PATCH 22/26] perf tools: Use machine__for_each_dso in perf_session__cache_build_ids

Using machine__for_each_dso in perf_session__cache_build_ids,
so we can reuse perf_session__cache_build_ids with different
callback in following changes.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/util/build-id.c | 41 +++++++++++++++-----------------------
 1 file changed, 16 insertions(+), 25 deletions(-)

diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index bf044e52ad1f..22968504c6de 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -869,12 +869,16 @@ int build_id_cache__remove_s(const char *sbuild_id)
 	return err;
 }
 
-static int dso__cache_build_id(struct dso *dso, struct machine *machine)
+static int dso__cache_build_id(struct dso *dso, struct machine *machine,
+			       void *priv __maybe_unused)
 {
 	bool is_kallsyms = dso__is_kallsyms(dso);
 	bool is_vdso = dso__is_vdso(dso);
 	const char *name = dso->long_name;
 
+	if (!dso->has_build_id)
+		return 0;
+
 	if (dso__is_kcore(dso)) {
 		is_kallsyms = true;
 		name = machine->mmap_name;
@@ -883,43 +887,30 @@ static int dso__cache_build_id(struct dso *dso, struct machine *machine)
 				     dso->nsinfo, is_kallsyms, is_vdso);
 }
 
-static int __dsos__cache_build_ids(struct list_head *head,
-				   struct machine *machine)
+static int
+machines__for_each_dso(struct machines *machines, machine__dso_t fn, void *priv)
 {
-	struct dso *pos;
-	int err = 0;
-
-	dsos__for_each_with_build_id(pos, head)
-		if (dso__cache_build_id(pos, machine))
-			err = -1;
+	int ret = machine__for_each_dso(&machines->host, fn, priv);
+	struct rb_node *nd;
 
-	return err;
-}
+	for (nd = rb_first_cached(&machines->guests); nd;
+	     nd = rb_next(nd)) {
+		struct machine *pos = rb_entry(nd, struct machine, rb_node);
 
-static int machine__cache_build_ids(struct machine *machine)
-{
-	return __dsos__cache_build_ids(&machine->dsos.head, machine);
+		ret |= machine__for_each_dso(pos, fn, priv);
+	}
+	return ret ? -1 : 0;
 }
 
 int perf_session__cache_build_ids(struct perf_session *session)
 {
-	struct rb_node *nd;
-	int ret;
-
 	if (no_buildid_cache)
 		return 0;
 
 	if (mkdir(buildid_dir, 0755) != 0 && errno != EEXIST)
 		return -1;
 
-	ret = machine__cache_build_ids(&session->machines.host);
-
-	for (nd = rb_first_cached(&session->machines.guests); nd;
-	     nd = rb_next(nd)) {
-		struct machine *pos = rb_entry(nd, struct machine, rb_node);
-		ret |= machine__cache_build_ids(pos);
-	}
-	return ret ? -1 : 0;
+	return machines__for_each_dso(&session->machines, dso__cache_build_id, NULL) ?  -1 : 0;
 }
 
 static bool machine__read_build_ids(struct machine *machine, bool with_hits)
-- 
2.26.2