[PATCH] perf test: Fix a leaked map reference in the arch dwarf unwind tests

[Chen Pei]

maps__find() has returned a reference to the map it finds since
commit 42fd623b58db ("perf maps: Get map before returning in
maps__find"), which updated arch/x86/tests/dwarf-unwind.c but missed
the arm, arm64 and powerpc copies. Release the map after reading its
end, as x86 does. All other callers of maps__find() already release
what they get.

Fixes: 42fd623b58db ("perf maps: Get map before returning in maps__find")
Signed-off-by: Chen Pei <cp0613 at linux.alibaba.com>
---
 tools/perf/arch/arm/tests/dwarf-unwind.c     | 1 +
 tools/perf/arch/arm64/tests/dwarf-unwind.c   | 1 +
 tools/perf/arch/powerpc/tests/dwarf-unwind.c | 1 +
 3 files changed, 3 insertions(+)

diff --git a/tools/perf/arch/arm/tests/dwarf-unwind.c b/tools/perf/arch/arm/tests/dwarf-unwind.c
index f421910e0709..d4707e9ffd2a 100644
--- a/tools/perf/arch/arm/tests/dwarf-unwind.c
+++ b/tools/perf/arch/arm/tests/dwarf-unwind.c
@@ -34,6 +34,7 @@ static int sample_ustack(struct perf_sample *sample,
 	}
 
 	stack_size = map__end(map) - sp;
+	map__put(map);
 	stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
 
 	memcpy(buf, (void *) sp, stack_size);
diff --git a/tools/perf/arch/arm64/tests/dwarf-unwind.c b/tools/perf/arch/arm64/tests/dwarf-unwind.c
index 440d00f0de14..fbc161a49369 100644
--- a/tools/perf/arch/arm64/tests/dwarf-unwind.c
+++ b/tools/perf/arch/arm64/tests/dwarf-unwind.c
@@ -34,6 +34,7 @@ static int sample_ustack(struct perf_sample *sample,
 	}
 
 	stack_size = map__end(map) - sp;
+	map__put(map);
 	stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
 
 	memcpy(buf, (void *) sp, stack_size);
diff --git a/tools/perf/arch/powerpc/tests/dwarf-unwind.c b/tools/perf/arch/powerpc/tests/dwarf-unwind.c
index 66af884baa66..b4bade5d59e2 100644
--- a/tools/perf/arch/powerpc/tests/dwarf-unwind.c
+++ b/tools/perf/arch/powerpc/tests/dwarf-unwind.c
@@ -34,6 +34,7 @@ static int sample_ustack(struct perf_sample *sample,
 	}
 
 	stack_size = map__end(map) - sp;
+	map__put(map);
 	stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
 
 	memcpy(buf, (void *) sp, stack_size);
-- 
2.50.1