47 lines
1.4 KiB
Python
47 lines
1.4 KiB
Python
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#!/usr/bin/env python
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#
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# Copyright (C) 2024 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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"""A tool for constructing UFFD GC flag."""
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import argparse
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import os
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from uffd_gc_utils import should_enable_uffd_gc
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def parse_args():
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parser = argparse.ArgumentParser()
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parser.add_argument('kernel_version_file')
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parser.add_argument('output')
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return parser.parse_args()
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def main():
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args = parse_args()
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enable_uffd_gc = should_enable_uffd_gc(args.kernel_version_file)
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flag = '--runtime-arg -Xgc:CMC' if enable_uffd_gc else ''
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# Prevent the file's mtime from being changed if the contents don't change.
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# This avoids unnecessary dexpreopt reruns.
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if os.path.isfile(args.output):
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with open(args.output, 'r') as f:
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if f.read() == flag:
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return
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with open(args.output, 'w') as f:
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f.write(flag)
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if __name__ == '__main__':
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main()
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