[PATCH v1] perf jevents: Provide better path information for broken json

[Ian Rogers]

If the json input to jevents.py is broken it can be problematic to
work out which particular json file is broken. When processing files
catch exceptions that occur that re-raise the exception with path
details added.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/perf/pmu-events/jevents.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
index 6e71b09dbc2a..caeddd939cfe 100755
--- a/tools/perf/pmu-events/jevents.py
+++ b/tools/perf/pmu-events/jevents.py
@@ -461,12 +461,16 @@ def preprocess_arch_std_files(archpath: str) -> None:
   """Read in all architecture standard events."""
   global _arch_std_events
   for item in os.scandir(archpath):
-    if item.is_file() and item.name.endswith('.json'):
+    if not item.is_file() or not item.name.endswith('.json'):
+      continue
+    try:
       for event in read_json_events(item.path, topic=''):
         if event.name:
           _arch_std_events[event.name.lower()] = event
         if event.metric_name:
           _arch_std_events[event.metric_name.lower()] = event
+    except Exception as e:
+        raise RuntimeError(f'Failure processing \'{item.name}\' in \'{archpath}\'') from e
 
 
 def add_events_table_entries(item: os.DirEntry, topic: str) -> None:
@@ -1255,7 +1259,10 @@ def main() -> None:
           item_path = '/'.join(parents) + ('/' if len(parents) > 0 else '') + item.name
           if 'test' not in item_path and 'common' not in item_path and item_path not in _args.model.split(','):
             continue
-      action(parents, item)
+      try:
+        action(parents, item)
+      except Exception as e:
+        raise RuntimeError(f'Action failure for \'{item.name}\' in {parents}') from e
       if item.is_dir():
         ftw(item.path, parents + [item.name], action)
 
-- 
2.47.0.338.g60cca15819-goog