linux-kernel - [PATCH v1] perf jevents: Fix build issue in '*/' in event descriptions

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Message-Id: <20241113165558.628856-1-irogers@google.com>
Date: Wed, 13 Nov 2024 08:55:58 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, John Garry <john.g.garry@...cle.com>, 
	Sandipan Das <sandipan.das@....com>, Xu Yang <xu.yang_2@....com>, 
	Benjamin Gray <bgray@...ux.ibm.com>, linux-perf-users@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: [PATCH v1] perf jevents: Fix build issue in '*/' in event descriptions

For big string offsets we output comments for what string the offset
is for. If the string contains a '*/' as seen in Intel Arrowlake event
descriptions, then this causes C parsing issues for the generated
pmu-events.c. Catch such '*/' values and escape to avoid this.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/pmu-events/jevents.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
index 6e71b09dbc2a..028cf3c43881 100755
--- a/tools/perf/pmu-events/jevents.py
+++ b/tools/perf/pmu-events/jevents.py
@@ -430,8 +430,11 @@ class JsonEvent:
   def to_c_string(self, metric: bool) -> str:
     """Representation of the event as a C struct initializer."""
 
+    def fix_comment(s: str) -> str:
+        return s.replace('*/', '\*\/')
+
     s = self.build_c_string(metric)
-    return f'{{ { _bcs.offsets[s] } }}, /* {s} */\n'
+    return f'{{ { _bcs.offsets[s] } }}, /* {fix_comment(s)} */\n'
 
 
 @lru_cache(maxsize=None)
-- 
2.47.0.277.g8800431eea-goog