perf evlist: Auto unmap on destructor

Removing further boilerplate after making sure perf_evlist__munmap can
be called multiple times for the same evlist.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-o0luenuld4abupm4nmrgzm6f@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-record.c

@@ -968,8 +968,6 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
 	}
 
 	err = __cmd_record(&record, argc, argv);
-
-	perf_evlist__munmap(rec->evlist);
 out_symbol_exit:
 	symbol__exit();
 	return err;

tools/perf/builtin-trace.c

@@ -1993,7 +1993,6 @@ out_disable:
 		}
 	}
 
-	perf_evlist__munmap(evlist);
 out_delete_evlist:
 	perf_evlist__delete(evlist);
 out:

tools/perf/tests/code-reading.c

@@ -540,7 +540,6 @@ static int do_test_code_reading(bool try_kcore)
 		err = TEST_CODE_READING_OK;
 out_err:
 	if (evlist) {
-		perf_evlist__munmap(evlist);
 		perf_evlist__delete(evlist);
 	} else {
 		cpu_map__delete(cpus);

tools/perf/tests/keep-tracking.c

@@ -142,7 +142,6 @@ int test__keep_tracking(void)
 out_err:
 	if (evlist) {
 		perf_evlist__disable(evlist);
-		perf_evlist__munmap(evlist);
 		perf_evlist__delete(evlist);
 	} else {
 		cpu_map__delete(cpus);

tools/perf/tests/mmap-basic.c

@@ -105,13 +105,13 @@ int test__basic_mmap(void)
 		if (event->header.type != PERF_RECORD_SAMPLE) {
 			pr_debug("unexpected %s event\n",
 				 perf_event__name(event->header.type));
-			goto out_munmap;
+			goto out_delete_evlist;
 		}
 
 		err = perf_evlist__parse_sample(evlist, event, &sample);
 		if (err) {
 			pr_err("Can't parse sample, err = %d\n", err);
-			goto out_munmap;
+			goto out_delete_evlist;
 		}
 
 		err = -1;
@@ -119,7 +119,7 @@ int test__basic_mmap(void)
 		if (evsel == NULL) {
 			pr_debug("event with id %" PRIu64
 				 " doesn't map to an evsel\n", sample.id);
-			goto out_munmap;
+			goto out_delete_evlist;
 		}
 		nr_events[evsel->idx]++;
 		perf_evlist__mmap_consume(evlist, 0);
@@ -132,12 +132,10 @@ int test__basic_mmap(void)
 				 expected_nr_events[evsel->idx],
 				 perf_evsel__name(evsel), nr_events[evsel->idx]);
 			err = -1;
-			goto out_munmap;
+			goto out_delete_evlist;
 		}
 	}
 
-out_munmap:
-	perf_evlist__munmap(evlist);
 out_delete_evlist:
 	perf_evlist__delete(evlist);
 	cpus	= NULL;

tools/perf/tests/open-syscall-tp-fields.c

@@ -85,7 +85,7 @@ int test__syscall_open_tp_fields(void)
 				err = perf_evsel__parse_sample(evsel, event, &sample);
 				if (err) {
 					pr_err("Can't parse sample, err = %d\n", err);
-					goto out_munmap;
+					goto out_delete_evlist;
 				}
 
 				tp_flags = perf_evsel__intval(evsel, &sample, "flags");
@@ -93,7 +93,7 @@ int test__syscall_open_tp_fields(void)
 				if (flags != tp_flags) {
 					pr_debug("%s: Expected flags=%#x, got %#x\n",
 						 __func__, flags, tp_flags);
-					goto out_munmap;
+					goto out_delete_evlist;
 				}
 
 				goto out_ok;
@@ -105,13 +105,11 @@ int test__syscall_open_tp_fields(void)
 
 		if (++nr_polls > 5) {
 			pr_debug("%s: no events!\n", __func__);
-			goto out_munmap;
+			goto out_delete_evlist;
 		}
 	}
 out_ok:
 	err = 0;
-out_munmap:
-	perf_evlist__munmap(evlist);
 out_delete_evlist:
 	perf_evlist__delete(evlist);
 out:

tools/perf/tests/perf-record.c

@@ -165,7 +165,7 @@ int test__PERF_RECORD(void)
 					if (verbose)
 						perf_event__fprintf(event, stderr);
 					pr_debug("Couldn't parse sample\n");
-					goto out_err;
+					goto out_delete_evlist;
 				}
 
 				if (verbose) {
@@ -302,8 +302,6 @@ found_exit:
 		pr_debug("PERF_RECORD_MMAP for %s missing!\n", "[vdso]");
 		++errs;
 	}
-out_err:
-	perf_evlist__munmap(evlist);
 out_delete_evlist:
 	perf_evlist__delete(evlist);
 out:

tools/perf/tests/perf-time-to-tsc.c

@@ -166,7 +166,6 @@ next_event:
 out_err:
 	if (evlist) {
 		perf_evlist__disable(evlist);
-		perf_evlist__munmap(evlist);
 		perf_evlist__delete(evlist);
 	}
 

tools/perf/tests/sw-clock.c

@@ -90,7 +90,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
 		err = perf_evlist__parse_sample(evlist, event, &sample);
 		if (err < 0) {
 			pr_debug("Error during parse sample\n");
-			goto out_unmap_evlist;
+			goto out_delete_evlist;
 		}
 
 		total_periods += sample.period;
@@ -105,8 +105,6 @@ next_event:
 		err = -1;
 	}
 
-out_unmap_evlist:
-	perf_evlist__munmap(evlist);
 out_delete_evlist:
 	perf_evlist__delete(evlist);
 	return err;

tools/perf/tests/task-exit.c

@@ -112,7 +112,6 @@ retry:
 		err = -1;
 	}
 
-	perf_evlist__munmap(evlist);
 out_delete_evlist:
 	perf_evlist__delete(evlist);
 	return err;

tools/perf/util/evlist.c

@@ -107,6 +107,7 @@ void perf_evlist__exit(struct perf_evlist *evlist)
 
 void perf_evlist__delete(struct perf_evlist *evlist)
 {
+	perf_evlist__munmap(evlist);
 	perf_evlist__close(evlist);
 	cpu_map__delete(evlist->cpus);
 	thread_map__delete(evlist->threads);
@@ -587,6 +588,9 @@ void perf_evlist__munmap(struct perf_evlist *evlist)
 {
 	int i;
 
+	if (evlist->mmap == NULL)
+		return;
+
 	for (i = 0; i < evlist->nr_mmaps; i++)
 		__perf_evlist__munmap(evlist, i);