linux-kernel - [PATCH v4 06/17] perf jevents: Provide path to json file on error

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Message-Id: <20220804221816.1802790-7-irogers@google.com>
Date:   Thu,  4 Aug 2022 15:18:05 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     John Garry <john.garry@...wei.com>, Will Deacon <will@...nel.org>,
        James Clark <james.clark@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org
Cc:     Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH v4 06/17] perf jevents: Provide path to json file on error

If a JSONDecoderError or similar is raised then it is useful to know the
path. Print this and then raise the exception agan.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/pmu-events/jevents.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
index 98d18d5c3830..12d2daf3570c 100755
--- a/tools/perf/pmu-events/jevents.py
+++ b/tools/perf/pmu-events/jevents.py
@@ -224,7 +224,12 @@ class JsonEvent:
 
 def read_json_events(path: str) -> Sequence[JsonEvent]:
   """Read json events from the specified file."""
-  return json.load(open(path), object_hook=lambda d: JsonEvent(d))
+
+  try:
+    return json.load(open(path), object_hook=lambda d: JsonEvent(d))
+  except BaseException as err:
+    print(f"Exception processing {path}")
+    raise
 
 
 def preprocess_arch_std_files(archpath: str) -> None:
-- 
2.37.1.559.g78731f0fdb-goog