perf dsos: Attempt to better abstract DSOs internals

Move functions from machine and build-id to dsos. Pass 'struct dsos'
rather than internal state.

Rename some functions to better represent which data structure they
operate on.

Signed-off-by: Ian Rogers <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: Anne Macedo <[e-mail]>
Cc: Athira Rajeev <[e-mail]>
Cc: Ben Gainey <[e-mail]>
Cc: Changbin Du <[e-mail]>
Cc: Chengen Du <[e-mail]>
Cc: Colin Ian King <[e-mail]>
Cc: Ilkka Koskinen <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: James Clark <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: K Prateek Nayak <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: Leo Yan <[e-mail]>
Cc: Li Dong <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Markus Elfring <[e-mail]>
Cc: Masami Hiramatsu <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Paran Lee <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Ravi Bangoria <[e-mail]>
Cc: Song Liu <[e-mail]>
Cc: Sun Haiyong <[e-mail]>
Cc: Thomas Richter <[e-mail]>
Cc: Yang Jihong <[e-mail]>
Cc: Yanteng Si <[e-mail]>
Cc: Yicong Yang <[e-mail]>
Cc: zhaimingbing <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/builtin-inject.c

···
 		 */
 		if (perf_header__has_feat(&session->header, HEADER_BUILD_ID) &&
 		    inject->have_auxtrace && !inject->itrace_synth_opts.set)
-			dsos__hit_all(session);
+			perf_session__dsos_hit_all(session);
 		/*
 		 * The AUX areas have been removed and replaced with
 		 * synthesized hardware events, so clear the feature flag.

tools/perf/builtin-record.c

···
 		process_buildids(rec);
 
 		if (rec->buildid_all)
-			dsos__hit_all(rec->session);
+			perf_session__dsos_hit_all(rec->session);
 	}
 	perf_session__write_header(rec->session, rec->evlist, fd, true);
 

tools/perf/util/build-id.c

···
 	return err;
 }
 
-static int __dsos__hit_all(struct list_head *head)
-{
-	struct dso *pos;
-
-	list_for_each_entry(pos, head, node)
-		pos->hit = true;
-
-	return 0;
-}
-
-static int machine__hit_all_dsos(struct machine *machine)
-{
-	return __dsos__hit_all(&machine->dsos.head);
-}
-
-int dsos__hit_all(struct perf_session *session)
-{
-	struct rb_node *nd;
-	int err;
-
-	err = machine__hit_all_dsos(&session->machines.host);
-	if (err)
-		return err;
-
-	for (nd = rb_first_cached(&session->machines.guests); nd;
-	     nd = rb_next(nd)) {
-		struct machine *pos = rb_entry(nd, struct machine, rb_node);
-
-		err = machine__hit_all_dsos(pos);
-		if (err)
-			return err;
-	}
-
-	return 0;
-}
-
 void disable_buildid_cache(void)
 {
 	no_buildid_cache = true;
···
 
 static bool machine__read_build_ids(struct machine *machine, bool with_hits)
 {
-	return __dsos__read_build_ids(&machine->dsos.head, with_hits);
+	return __dsos__read_build_ids(&machine->dsos, with_hits);
 }
 
 bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)

tools/perf/util/build-id.h

···
 			   struct perf_sample *sample, struct evsel *evsel,
 			   struct machine *machine);
 
-int dsos__hit_all(struct perf_session *session);
-
 int perf_event__inject_buildid(struct perf_tool *tool, union perf_event *event,
 			       struct perf_sample *sample, struct evsel *evsel,
 			       struct machine *machine);

tools/perf/util/dso.h

···
 #define dso__for_each_symbol(dso, pos, n)	\
 	symbols__for_each_entry(&(dso)->symbols, pos, n)
 
-#define dsos__for_each_with_build_id(pos, head)	\
-	list_for_each_entry(pos, head, node)	\
-		if (!pos->has_build_id)		\
-			continue;		\
-		else
-
 static inline void dso__set_loaded(struct dso *dso)
 {
 	dso->loaded = true;

tools/perf/util/dsos.c

···
 #include <symbol.h> // filename__read_build_id
 #include <unistd.h>
 
+void dsos__init(struct dsos *dsos)
+{
+	INIT_LIST_HEAD(&dsos->head);
+	dsos->root = RB_ROOT;
+	init_rwsem(&dsos->lock);
+}
+
+static void dsos__purge(struct dsos *dsos)
+{
+	struct dso *pos, *n;
+
+	down_write(&dsos->lock);
+
+	list_for_each_entry_safe(pos, n, &dsos->head, node) {
+		RB_CLEAR_NODE(&pos->rb_node);
+		pos->root = NULL;
+		list_del_init(&pos->node);
+		dso__put(pos);
+	}
+
+	up_write(&dsos->lock);
+}
+
+void dsos__exit(struct dsos *dsos)
+{
+	dsos__purge(dsos);
+	exit_rwsem(&dsos->lock);
+}
+
 static int __dso_id__cmp(struct dso_id *a, struct dso_id *b)
 {
 	if (a->maj > b->maj) return -1;
···
 	return __dso_id__cmp(&a->id, &b->id);
 }
 
-bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
+bool __dsos__read_build_ids(struct dsos *dsos, bool with_hits)
 {
+	struct list_head *head = &dsos->head;
 	bool have_build_id = false;
 	struct dso *pos;
 	struct nscookie nsc;
···
 	return dso;
 }
 
-size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
+size_t __dsos__fprintf_buildid(struct dsos *dsos, FILE *fp,
 			       bool (skip)(struct dso *dso, int parm), int parm)
 {
+	struct list_head *head = &dsos->head;
 	struct dso *pos;
 	size_t ret = 0;
 
···
 	return ret;
 }
 
-size_t __dsos__fprintf(struct list_head *head, FILE *fp)
+size_t __dsos__fprintf(struct dsos *dsos, FILE *fp)
 {
+	struct list_head *head = &dsos->head;
 	struct dso *pos;
 	size_t ret = 0;
 
···
 	}
 
 	return ret;
+}
+
+int __dsos__hit_all(struct dsos *dsos)
+{
+	struct list_head *head = &dsos->head;
+	struct dso *pos;
+
+	list_for_each_entry(pos, head, node)
+		pos->hit = true;
+
+	return 0;
 }

tools/perf/util/dsos.h

···
 	struct rw_semaphore lock;
 };
 
+#define dsos__for_each_with_build_id(pos, head)	\
+	list_for_each_entry(pos, head, node)	\
+		if (!pos->has_build_id)		\
+			continue;		\
+		else
+
+void dsos__init(struct dsos *dsos);
+void dsos__exit(struct dsos *dsos);
+
 void __dsos__add(struct dsos *dsos, struct dso *dso);
 void dsos__add(struct dsos *dsos, struct dso *dso);
 struct dso *__dsos__addnew(struct dsos *dsos, const char *name);
···
 
 struct dso *dsos__findnew_id(struct dsos *dsos, const char *name, struct dso_id *id);
  
+bool __dsos__read_build_ids(struct dsos *dsos, bool with_hits);
+
 struct dso *__dsos__findnew_link_by_longname_id(struct rb_root *root, struct dso *dso,
 						const char *name, struct dso_id *id);
 
-bool __dsos__read_build_ids(struct list_head *head, bool with_hits);
-
-size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
+size_t __dsos__fprintf_buildid(struct dsos *dsos, FILE *fp,
 			       bool (skip)(struct dso *dso, int parm), int parm);
-size_t __dsos__fprintf(struct list_head *head, FILE *fp);
+size_t __dsos__fprintf(struct dsos *dsos, FILE *fp);
+
+int __dsos__hit_all(struct dsos *dsos);
 
 #endif /* __PERF_DSOS */

tools/perf/util/machine.c

···
 	return map__dso(machine->vmlinux_map);
 }
 
-static void dsos__init(struct dsos *dsos)
-{
-	INIT_LIST_HEAD(&dsos->head);
-	dsos->root = RB_ROOT;
-	init_rwsem(&dsos->lock);
-}
-
 static int machine__set_mmap_name(struct machine *machine)
 {
 	if (machine__is_host(machine))
···
 	}
 
 	return machine;
-}
-
-static void dsos__purge(struct dsos *dsos)
-{
-	struct dso *pos, *n;
-
-	down_write(&dsos->lock);
-
-	list_for_each_entry_safe(pos, n, &dsos->head, node) {
-		RB_CLEAR_NODE(&pos->rb_node);
-		pos->root = NULL;
-		list_del_init(&pos->node);
-		dso__put(pos);
-	}
-
-	up_write(&dsos->lock);
-}
-
-static void dsos__exit(struct dsos *dsos)
-{
-	dsos__purge(dsos);
-	exit_rwsem(&dsos->lock);
 }
 
 void machine__delete_threads(struct machine *machine)
···
 size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
 {
 	struct rb_node *nd;
-	size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp);
+	size_t ret = __dsos__fprintf(&machines->host.dsos, fp);
 
 	for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) {
 		struct machine *pos = rb_entry(nd, struct machine, rb_node);
-		ret += __dsos__fprintf(&pos->dsos.head, fp);
+		ret += __dsos__fprintf(&pos->dsos, fp);
 	}
 
 	return ret;
···
 size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
 				     bool (skip)(struct dso *dso, int parm), int parm)
 {
-	return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm);
+	return __dsos__fprintf_buildid(&m->dsos, fp, skip, parm);
 }
 
 size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
···
 	}
 
 	return false;
+}
+
+int machine__hit_all_dsos(struct machine *machine)
+{
+	return __dsos__hit_all(&machine->dsos);
 }

tools/perf/util/machine.h

···
 int machine__resolve(struct machine *machine, struct addr_location *al,
 		     struct perf_sample *sample);
 
+int machine__hit_all_dsos(struct machine *machine);
+
 #endif /* __PERF_MACHINE_H */

tools/perf/util/session.c

···
 	}
 	return 0;
 }
+
+int perf_session__dsos_hit_all(struct perf_session *session)
+{
+	struct rb_node *nd;
+	int err;
+
+	err = machine__hit_all_dsos(&session->machines.host);
+	if (err)
+		return err;
+
+	for (nd = rb_first_cached(&session->machines.guests); nd;
+	     nd = rb_next(nd)) {
+		struct machine *pos = rb_entry(nd, struct machine, rb_node);
+
+		err = machine__hit_all_dsos(pos);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}

tools/perf/util/session.h

···
 				      union perf_event *event,
 				      struct perf_sample *sample);
 
+int perf_session__dsos_hit_all(struct perf_session *session);
+
 int perf_event__process_id_index(struct perf_session *session,
 				 union perf_event *event);