libperf: Adopt simplified perf_evsel__close() function from tools/perf

Add perf_evsel__close() function to libperf while keeping a tools/perf
specific evsel__close() to free ids.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-64-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-trace.c

@@ -2401,7 +2401,7 @@ static int trace__event_handler(struct trace *trace, struct evsel *evsel,
 
 			if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) {
 				evsel__disable(evsel);
-				perf_evsel__close(evsel);
+				evsel__close(evsel);
 			}
 		}
 	}

tools/perf/lib/evsel.c

@@ -111,3 +111,29 @@ int perf_evsel__open(struct perf_evsel *evsel, struct perf_cpu_map *cpus,
 
 	return err;
 }
+
+void perf_evsel__close_fd(struct perf_evsel *evsel)
+{
+	int cpu, thread;
+
+	for (cpu = 0; cpu < xyarray__max_x(evsel->fd); cpu++)
+		for (thread = 0; thread < xyarray__max_y(evsel->fd); ++thread) {
+			close(FD(evsel, cpu, thread));
+			FD(evsel, cpu, thread) = -1;
+		}
+}
+
+void perf_evsel__free_fd(struct perf_evsel *evsel)
+{
+	xyarray__delete(evsel->fd);
+	evsel->fd = NULL;
+}
+
+void perf_evsel__close(struct perf_evsel *evsel)
+{
+	if (evsel->fd == NULL)
+		return;
+
+	perf_evsel__close_fd(evsel);
+	perf_evsel__free_fd(evsel);
+}

tools/perf/lib/include/internal/evsel.h

@@ -21,5 +21,7 @@ struct perf_evsel {
 };
 
 int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
+void perf_evsel__close_fd(struct perf_evsel *evsel);
+void perf_evsel__free_fd(struct perf_evsel *evsel);
 
 #endif /* __LIBPERF_INTERNAL_EVSEL_H */

tools/perf/lib/include/perf/evsel.h

@@ -15,5 +15,6 @@ LIBPERF_API struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr);
 LIBPERF_API void perf_evsel__delete(struct perf_evsel *evsel);
 LIBPERF_API int perf_evsel__open(struct perf_evsel *evsel, struct perf_cpu_map *cpus,
 				 struct perf_thread_map *threads);
+LIBPERF_API void perf_evsel__close(struct perf_evsel *evsel);
 
 #endif /* __LIBPERF_EVSEL_H */

tools/perf/lib/libperf.map

@@ -15,6 +15,7 @@ LIBPERF_0.0.1 {
 		perf_evsel__delete;
 		perf_evsel__init;
 		perf_evsel__open;
+		perf_evsel__close;
 		perf_evlist__new;
 		perf_evlist__delete;
 		perf_evlist__init;

tools/perf/tests/openat-syscall-all-cpus.c

@@ -116,7 +116,7 @@ int test__openat_syscall_event_on_all_cpus(struct test *test __maybe_unused, int
 
 	perf_evsel__free_counts(evsel);
 out_close_fd:
-	perf_evsel__close_fd(evsel);
+	perf_evsel__close_fd(&evsel->core);
 out_evsel_delete:
 	evsel__delete(evsel);
 out_cpu_map_delete:

tools/perf/tests/openat-syscall.c

@@ -57,7 +57,7 @@ int test__openat_syscall_event(struct test *test __maybe_unused, int subtest __m
 
 	err = 0;
 out_close_fd:
-	perf_evsel__close_fd(evsel);
+	perf_evsel__close_fd(&evsel->core);
 out_evsel_delete:
 	evsel__delete(evsel);
 out_thread_map_delete:

tools/perf/util/evlist.c

@@ -34,6 +34,7 @@
 #include <linux/err.h>
 #include <linux/zalloc.h>
 #include <perf/evlist.h>
+#include <perf/evsel.h>
 #include <perf/cpumap.h>
 
 #ifdef LACKS_SIGQUEUE_PROTOTYPE
@@ -1303,7 +1304,7 @@ void evlist__close(struct evlist *evlist)
 	struct evsel *evsel;
 
 	evlist__for_each_entry_reverse(evlist, evsel)
-		perf_evsel__close(evsel);
+		evsel__close(evsel);
 }
 
 static int perf_evlist__create_syswide_maps(struct evlist *evlist)
@@ -1772,7 +1773,7 @@ struct evsel *perf_evlist__reset_weak_group(struct evlist *evsel_list,
 			is_open = false;
 		if (c2->leader == leader) {
 			if (is_open)
-				perf_evsel__close(c2);
+				evsel__close(c2);
 			c2->leader = c2;
 			c2->core.nr_members = 0;
 		}

tools/perf/util/evsel.c

@@ -1265,12 +1265,6 @@ int perf_evsel__alloc_id(struct evsel *evsel, int ncpus, int nthreads)
 	return 0;
 }
 
-static void perf_evsel__free_fd(struct evsel *evsel)
-{
-	xyarray__delete(evsel->core.fd);
-	evsel->core.fd = NULL;
-}
-
 static void perf_evsel__free_id(struct evsel *evsel)
 {
 	xyarray__delete(evsel->sample_id);
@@ -1289,23 +1283,12 @@ static void perf_evsel__free_config_terms(struct evsel *evsel)
 	}
 }
 
-void perf_evsel__close_fd(struct evsel *evsel)
-{
-	int cpu, thread;
-
-	for (cpu = 0; cpu < xyarray__max_x(evsel->core.fd); cpu++)
-		for (thread = 0; thread < xyarray__max_y(evsel->core.fd); ++thread) {
-			close(FD(evsel, cpu, thread));
-			FD(evsel, cpu, thread) = -1;
-		}
-}
-
 void perf_evsel__exit(struct evsel *evsel)
 {
 	assert(list_empty(&evsel->core.node));
 	assert(evsel->evlist == NULL);
 	perf_evsel__free_counts(evsel);
-	perf_evsel__free_fd(evsel);
+	perf_evsel__free_fd(&evsel->core);
 	perf_evsel__free_id(evsel);
 	perf_evsel__free_config_terms(evsel);
 	cgroup__put(evsel->cgrp);
@@ -2057,13 +2040,9 @@ out_close:
 	return err;
 }
 
-void perf_evsel__close(struct evsel *evsel)
+void evsel__close(struct evsel *evsel)
 {
-	if (evsel->core.fd == NULL)
-		return;
-
-	perf_evsel__close_fd(evsel);
-	perf_evsel__free_fd(evsel);
+	perf_evsel__close(&evsel->core);
 	perf_evsel__free_id(evsel);
 }
 

tools/perf/util/evsel.h

@@ -268,7 +268,6 @@ const char *perf_evsel__group_name(struct evsel *evsel);
 int perf_evsel__group_desc(struct evsel *evsel, char *buf, size_t size);
 
 int perf_evsel__alloc_id(struct evsel *evsel, int ncpus, int nthreads);
-void perf_evsel__close_fd(struct evsel *evsel);
 
 void __perf_evsel__set_sample_bit(struct evsel *evsel,
 				  enum perf_event_sample_format bit);
@@ -298,7 +297,7 @@ int perf_evsel__open_per_thread(struct evsel *evsel,
 				struct perf_thread_map *threads);
 int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
 		struct perf_thread_map *threads);
-void perf_evsel__close(struct evsel *evsel);
+void evsel__close(struct evsel *evsel);
 
 struct perf_sample;