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

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 <[email protected]>

---
 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(+)

tools/perf/arch/arm/tests/dwarf-unwind.c +1 -0

index f421910e0709..d4707e9ffd2a 100644
@@ -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);

tools/perf/arch/arm64/tests/dwarf-unwind.c +1 -0

index 440d00f0de14..fbc161a49369 100644
@@ -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);

tools/perf/arch/powerpc/tests/dwarf-unwind.c +1 -1

index 66af884baa66..b4bade5d59e2 100644
@@ -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

Quoted 8 lines · 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.

Quoted 2 lines

Fixes 42fd623b58db ("perf maps: Get map before returning in maps__find")

Signed-off-by Chen Pei <[email protected]>

Reviewed-by Ian Rogers <[email protected]>

Quoted 8 lines · 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.

Quoted 2 lines

Fixes 42fd623b58db ("perf maps: Get map before returning in maps__find")

Signed-off-by Chen Pei <[email protected]>

Reviewed-by Ian Rogers <[email protected]>