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https://github.com/tangerineturtle1/NX2navi.git
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358713fbf2
The review found that the comment said an overflow in the period arithmetic fails the check, but -fsanitize=undefined does not trap unsigned wrap-around, and every period and time in runtime/dlssg_pace.h is a uint64_t. The check now builds with -fsanitize=undefined,unsigned-integer-overflow and the same -fsanitize-trap list, and the comment says why. It passes; a uint64_t subtraction that wraps traps under these flags and runs on under the old ones. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
46 lines
1.8 KiB
Python
46 lines
1.8 KiB
Python
"""Build and run tests/dlssg_pace_check.c: runtime/dlssg_pace.h, whether Reflex or the game's own pacer holds the frame
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limit with DLSS Frame Generation (vk_dlssg.c vk_dlssg_pace), and its checks of the frames Reflex held.
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Needs a C compiler only: no Vulkan headers, no GPU and no game files.
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Usage: dlssg_pace_check.py
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"""
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import os
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import shutil
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import subprocess
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import sys
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from pathlib import Path
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ROOT = Path(__file__).resolve().parents[1]
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MSYS_BIN = Path(r'C:\msys64\ucrt64\bin')
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def compiler():
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"""$CC, else MSYS2 UCRT64's clang, else clang on PATH (as tests/wb_lazy_check.py picks it)."""
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if os.environ.get('CC'):
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return os.environ['CC']
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if os.name == 'nt' and (MSYS_BIN / 'clang.exe').exists():
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return str(MSYS_BIN / 'clang.exe')
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return shutil.which('clang') or 'clang'
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def main():
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work = ROOT / 'build' / 'test' / 'dlssg_pace'
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work.mkdir(parents=True, exist_ok=True)
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exe = work / ('dlssg_pace_check.exe' if os.name == 'nt' else 'dlssg_pace_check')
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env = dict(os.environ)
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if os.name == 'nt' and MSYS_BIN.exists():
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env['PATH'] = str(MSYS_BIN) + os.pathsep + env.get('PATH', '')
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# undefined behaviour and unsigned wrap-around trap: every period and time in dlssg_pace.h is a uint64_t, which
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# -fsanitize=undefined alone lets wrap, so an overflow in that arithmetic fails the check instead of passing by
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# chance
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ub = 'undefined,unsigned-integer-overflow'
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subprocess.check_call([compiler(), '-std=gnu11', '-O1', '-Wall', '-Werror', f'-fsanitize={ub}',
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f'-fsanitize-trap={ub}', '-I', str(ROOT / 'runtime'),
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str(ROOT / 'tests' / 'dlssg_pace_check.c'), '-o', str(exe)], env=env)
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return subprocess.run([str(exe)], env=env).returncode
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if __name__ == '__main__':
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sys.exit(main())
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