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https://github.com/blackbearreloaded/ProsperoEden.git
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BlackBearReloaded
ac3fccd32d
* Driver shader cache: on whatever ids the app runs with, and the launch log says where it is * Driver shader cache patch: set the cached driver build aside so the change compiles
49 lines
2.4 KiB
Python
Executable File
49 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python3
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# SPDX-License-Identifier: GPL-3.0-or-later
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"""RADV's shader cache on disk stays on whichever user the app runs as.
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Mesa turns its disk cache off when the effective user or group differs from the real one: on a
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desktop that is a setuid program, which must not write a cache the real user owns. On the
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console it is what an elevated app looks like when a jailbreak changes only some of its ids, and
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there the cache is the app's own folder (MESA_SHADER_CACHE_DIR, headless/main.cpp). Without the
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cache every pipeline a game has is compiled again at every start, which for a game with many
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shaders is minutes of loading each time. Applied to the driver checkout after
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patch-radv-gs-compute.py; running it again changes nothing.
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"""
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from pathlib import Path
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import sys
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import hashlib
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fingerprint = hashlib.sha256(Path(__file__).read_bytes()).hexdigest()
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if sys.argv[1:2] == ['--digest']:
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print(fingerprint)
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raise SystemExit(0)
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if sys.argv[1:2] == ['--check']:
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stamp = Path(sys.argv[2])
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raise SystemExit(0 if stamp.is_file() and stamp.read_text().strip() == fingerprint else 1)
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root = Path(__file__).resolve().parents[1]
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src = Path(sys.argv[1]) if len(sys.argv) > 1 else root.parent / 'mihawk-vulkan-review/.deps/work/radv-src'
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os_file = src / 'src/util/disk_cache_os.c'
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text = os_file.read_text()
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check = ''' /* If running as a users other than the real user disable cache */
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if (!__normal_user())
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return false;
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'''
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kept = ''' /* ProsperoEden: the console app's ids may differ after elevation; its cache folder is its
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* own, so the cache stays on (tools/patch-radv-disk-cache.py). */
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'''
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# Checked by its code: a tree already patched has no user check left in disk_cache_enabled().
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if kept not in text:
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assert text.count(check) == 1, 'disk_cache_enabled changed'
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os_file.write_text(text.replace(check, kept))
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# Upstream skips the whole build while its receipt names the pinned revision: set the receipt
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# aside so the next build compiles the changed file (Ninja keeps every other object).
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provenance = root.parent / 'mihawk-vulkan-review/.deps/native/radv-release/PROVENANCE.txt'
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if provenance.exists():
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provenance.replace(provenance.with_suffix('.base.txt'))
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enabled = os_file.read_text().split('disk_cache_enabled()', 1)[1].split('\n}\n', 1)[0]
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assert '__normal_user' not in enabled, 'disk_cache_enabled still checks the user'
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print('RADV disk cache: on for an elevated app')
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