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deps/v8/tools/builtins-pgo/assert_builtins_hashes.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+
+# Copyright 2023 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Compare builtins hashes from two architectures and enforce their equality.
+Bail out with an error and details on the difference otherwise.
+"""
+
+import difflib
+import sys
+
+assert len(sys.argv) > 3
+
+file1 = sys.argv[1]
+file2 = sys.argv[2]
+report = sys.argv[3]
+
+with open(file1) as f1, open(file2) as f2:
+  diff = list(difflib.unified_diff(
+      f1.read().splitlines(),
+      f2.read().splitlines(),
+      fromfile=file1,
+      tofile=file2,
+      lineterm='',
+  ))
+
+if diff:
+  print('Detected incompatible builtins hashes:')
+  for line in diff:
+    print(line)
+  sys.exit(1)
+
+with open(report, 'w') as f:
+  f.write('No builtins incompatibilities detected.')