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87b7292aa5
drgn is currently licensed as GPLv3+. Part of the long term vision for drgn is that other projects can use it as a library providing programmatic interfaces for debugger functionality. A more permissive license is better suited to this goal. We decided on LGPLv2.1+ as a good balance between software freedom and permissiveness. All contributors not employed by Meta were contacted via email and consented to the license change. The only exception was the author of commitc4fbf7e589("libdrgn: fix for compilation error"), who did not respond. That commit reverted a single line of code to one originally written by me in commit640b1c011d("libdrgn: embed DWARF index in DWARF info cache"). Signed-off-by: Omar Sandoval <osandov@osandov.com>
50 lines
1.5 KiB
Python
Executable File
50 lines
1.5 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) Meta Platforms, Inc. and affiliates.
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# SPDX-License-Identifier: LGPL-2.1-or-later
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import argparse
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import re
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import sys
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(
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description="Generate PageFlag() helpers from include/linux/page-flags.h"
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)
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args = parser.parse_args()
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flags = {
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# PageUptodate() isn't defined with PAGEFLAG because it needs
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# additional memory barriers, but other than that it's the same.
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"Uptodate": "uptodate",
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}
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for match in re.finditer(
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r"\b(?:|__|TEST)PAGEFLAG\s*\(\s*(\w+)(?<!uname)\s*,\s*(\w+)\s*,\s*\w+\s*\)",
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sys.stdin.read(),
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):
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if flags.setdefault(match.group(1), match.group(2)) != match.group(2):
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sys.exit(f"{match.group('uname')} has multiple lowercase names?")
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print(" # Generated by scripts/generate_page_flag_getters.py.")
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for uname, lname in sorted(flags.items()):
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print(f' "Page{uname}",')
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print(")")
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print()
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for uname, lname in sorted(flags.items()):
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print(
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f'''
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def Page{uname}(page: Object) -> bool:
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"""
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Return whether the ``PG_{lname}`` flag is set on a page.
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:param page: ``struct page *``
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"""
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try:
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flag = page.prog_["PG_{lname}"]
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except KeyError:
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return False
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return bool(page.flags & (1 << flag))
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'''
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)
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print()
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print("# End generated by scripts/generate_page_flag_getters.py.")
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