Date:   Mon, 23 Jan 2023 22:33:10 -0800
In-Reply-To: <20230124063320.668917-1-irogers@google.com>
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Subject: [PATCH v3 01/11] perf jevents metric: Correct Function equality
From:   Ian Rogers <irogers@google.com>
To:     John Garry <john.g.garry@oracle.com>,
        Will Deacon <will@kernel.org>,
        James Clark <james.clark@arm.com>,
        Mike Leach <mike.leach@linaro.org>,
        Leo Yan <leo.yan@linaro.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Adrian Hunter <adrian.hunter@intel.com>,
        Kan Liang <kan.liang@linux.intel.com>,
        Kim Phillips <kim.phillips@amd.com>,
        Florian Fischer <florian.fischer@muhq.space>,
        Ravi Bangoria <ravi.bangoria@amd.com>,
        Xing Zhengjun <zhengjun.xing@linux.intel.com>,
        Rob Herring <robh@kernel.org>,
        Kang Minchul <tegongkang@gmail.com>,
        linux-arm-kernel@lists.infradead.org,
        linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
        Sandipan Das <sandipan.das@amd.com>,
        Jing Zhang <renyu.zj@linux.alibaba.com>,
        linuxppc-dev@lists.ozlabs.org, Kajol Jain <kjain@linux.ibm.com>
Cc:     Stephane Eranian <eranian@google.com>,
        Perry Taylor <perry.taylor@intel.com>,
        Caleb Biggers <caleb.biggers@intel.com>,
        Ian Rogers <irogers@google.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

rhs may not be defined, say for source_count, so add a guard.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/pmu-events/metric.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/pmu-events/metric.py b/tools/perf/pmu-events/metric.py
index 4797ed4fd817..2f2fd220e843 100644
--- a/tools/perf/pmu-events/metric.py
+++ b/tools/perf/pmu-events/metric.py
@@ -261,8 +261,10 @@ class Function(Expression):
 
   def Equals(self, other: Expression) -> bool:
     if isinstance(other, Function):
-      return self.fn == other.fn and self.lhs.Equals(
-          other.lhs) and self.rhs.Equals(other.rhs)
+      result = self.fn == other.fn and self.lhs.Equals(other.lhs)
+      if self.rhs:
+        result = result and self.rhs.Equals(other.rhs)
+      return result
     return False
 
 
-- 
2.39.0.246.g2a6d74b583-goog