Validate bench.out against a JSON schema

This patch adds a JSON schema for the benchmark output file and also
adds a script that validates the generated output against the schema.

1 files changed, 85 insertions, 0 deletions

diff --git a/benchtests/scripts/validate_benchout.py b/benchtests/scripts/validate_benchout.py
new file mode 100755
index 0000000000..61a8cbd5d3
--- /dev/null
+++ b/benchtests/scripts/validate_benchout.py
@@ -0,0 +1,85 @@
+#!/usr/bin/python
+# Copyright (C) 2014 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+#
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <http://www.gnu.org/licenses/>.
+"""Benchmark output validator
+
+Given a benchmark output file in json format and a benchmark schema file,
+validate the output against the schema.
+"""
+
+from __future__ import print_function
+import json
+import sys
+import os
+
+try:
+    import jsonschema
+except ImportError:
+    print('Could not find jsonschema module.  Output not validated.')
+    # Return success because we don't want the bench target to fail just
+    # because the jsonschema module was not found.
+    sys.exit(os.EX_OK)
+
+
+def validate_bench(benchfile, schemafile):
+    """Validate benchmark file
+
+    Validate a benchmark output file against a JSON schema.
+
+    Args:
+        benchfile: The file name of the bench.out file.
+        schemafile: The file name of the JSON schema file to validate
+        bench.out against.
+
+    Exceptions:
+        jsonschema.ValidationError: When bench.out is not valid
+        jsonschema.SchemaError: When the JSON schema is not valid
+        IOError: If any of the files are not found.
+    """
+    with open(benchfile, 'r') as bfile:
+        with open(schemafile, 'r') as sfile:
+            bench = json.load(bfile)
+            schema = json.load(sfile)
+            jsonschema.validate(bench, schema)
+
+    # If we reach here, we're all good.
+    print("Benchmark output in %s is valid." % benchfile)
+
+
+def main(args):
+    """Main entry point
+
+    Args:
+        args: The command line arguments to the program
+
+    Returns:
+        0 on success or a non-zero failure code
+
+    Exceptions:
+        Exceptions thrown by validate_bench
+    """
+    if len(args) != 2:
+        print("Usage: %s <bench.out file> <bench.out schema>" % sys.argv[0],
+                file=sys.stderr)
+        return os.EX_USAGE
+
+    validate_bench(args[0], args[1])
+    return os.EX_OK
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv[1:]))