perf maps: Make delete static, always use put

Address/leak sanitizer with reference count checking can identify the
location of leaks, so use put rather than delete to avoid free-ing
memory when the reference count is >1. Add maps__zput to ensure the
variable is cleared.

Signed-off-by: Ian Rogers <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Ali Saidi <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Athira Rajeev <[email protected]>
Cc: Brian Robbins <[email protected]>
Cc: Changbin Du <[email protected]>
Cc: Dmitrii Dolgov <[email protected]>
Cc: Fangrui Song <[email protected]>
Cc: German Gomez <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Ivan Babrou <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jing Zhang <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: John Garry <[email protected]>
Cc: K Prateek Nayak <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Leo Yan <[email protected]>
Cc: Liam Howlett <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Miguel Ojeda <[email protected]>
Cc: Mike Leach <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Naveen N. Rao <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Ravi Bangoria <[email protected]>
Cc: Sean Christopherson <[email protected]>
Cc: Steinar H. Gunderson <[email protected]>
Cc: Suzuki Poulouse <[email protected]>
Cc: Wenyu Liu <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Yang Jihong <[email protected]>
Cc: Ye Xingchen <[email protected]>
Cc: Yuan Can <[email protected]>
Cc: [email protected]
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

4 files changed, 11 insertions, 4 deletions

diff --git a/tools/perf/tests/maps.c b/tools/perf/tests/maps.c
index 8c0eb5cf8bb5..5bb1123a91a7 100644
--- a/tools/perf/tests/maps.c
+++ b/tools/perf/tests/maps.c
@@ -140,7 +140,7 @@ static int test__maps__merge_in(struct test_suite *t __maybe_unused, int subtest
 	ret = check_maps(merged3, ARRAY_SIZE(merged3), maps);
 	TEST_ASSERT_VAL("merge check failed", !ret);
 
-	maps__delete(maps);
+	maps__zput(maps);
 	return TEST_OK;
 }
 
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 5d34d60a0045..8972c852d3bd 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -248,7 +248,7 @@ void machine__exit(struct machine *machine)
 		return;
 
 	machine__destroy_kernel_maps(machine);
-	maps__delete(machine->kmaps);
+	maps__zput(machine->kmaps);
 	dsos__exit(&machine->dsos);
 	machine__exit_vdso(machine);
 	zfree(&machine->root_dir);
diff --git a/tools/perf/util/maps.c b/tools/perf/util/maps.c
index 5ae6379a1b42..5206a6433117 100644
--- a/tools/perf/util/maps.c
+++ b/tools/perf/util/maps.c
@@ -171,7 +171,7 @@ struct maps *maps__new(struct machine *machine)
 	return result;
 }
 
-void maps__delete(struct maps *maps)
+static void maps__delete(struct maps *maps)
 {
 	maps__exit(maps);
 	unwind__finish_access(maps);
diff --git a/tools/perf/util/maps.h b/tools/perf/util/maps.h
index d2963456cfbe..83144e0645ed 100644
--- a/tools/perf/util/maps.h
+++ b/tools/perf/util/maps.h
@@ -57,13 +57,20 @@ struct kmap {
 };
 
 struct maps *maps__new(struct machine *machine);
-void maps__delete(struct maps *maps);
 bool maps__empty(struct maps *maps);
 int maps__clone(struct thread *thread, struct maps *parent);
 
 struct maps *maps__get(struct maps *maps);
 void maps__put(struct maps *maps);
 
+static inline void __maps__zput(struct maps **map)
+{
+	maps__put(*map);
+	*map = NULL;
+}
+
+#define maps__zput(map) __maps__zput(&map)
+
 static inline struct rb_root *maps__entries(struct maps *maps)
 {
 	return &RC_CHK_ACCESS(maps)->entries;