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punktfunk/packaging/windows/drivers/pf-vdisplay
enricobuehler 83d3d6384a
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refactor(windows-drivers): STEP 8 (1/n) — unsafe-reduction pass (per-site // SAFETY)
Audit pass over the new pf-vdisplay driver's unsafe surface: 92 per-site // SAFETY comments added
across adapter.rs / monitor.rs / entry.rs / callbacks.rs / swap_chain_processor.rs /
frame_transport.rs / direct_3d_device.rs (control.rs already had full coverage). COMMENTS ONLY — zero
logic, signature, or control-flow change (verified via git diff: every added line is a // SAFETY
comment or blank).

The dominant gap was the pervasive `core::mem::zeroed()` FFI-struct builds (IDDCX_*/WDF_*/
DISPLAYCONFIG_* C PODs whose all-zero bit pattern is a valid uninitialized/Invalid state, with the
required .Size/fields set immediately after) — each now carries a one-line // SAFETY. Plus explicit
notes on the two stack/local-pointer-into-FFI hazards (adapter.rs `version` ptr into
IddCxAdapterInitAsync; monitor.rs `edid` Vec ptr into IddCxMonitorCreate — both read synchronously
before the local drops) and the frame_transport.rs raw-HANDLE / mapped-header derefs + cleanup paths.
The already-justified Send/Sync wrappers (SendAdapter, CtxTypeInfo/DevCtxInfo, MonitorObject,
Sendable, FramePublisher) were audited — each already carried a // SAFETY. No site needed a code
change.

First slice of STEP 8 (the SudoVDA drop). Comments-only ⇒ build-neutral; windows-drivers.yml verifies
on the next runner build. Remaining STEP 8: re-vendor the installer's driver binary from the new
drivers/ tree (the shipping packaging/windows/pf-vdisplay/ binary is still built from the OLD oracle
tree with the SudoVDA-compat GUID — ABI-mismatched with the host's proto GUID), add an .inx to the
new tree, re-point scripts/README from vdisplay-driver/ to drivers/, flip the selector default to
pf-vdisplay, then delete the old oracle tree. Keep sudovda.rs (the runtime fallback + the
backend-neutral CCD helpers pf_vdisplay.rs reuses) and the WGC-relay/DDA secure path (the
secure-desktop gate is not yet passed on glass).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-25 12:00:55 +00:00
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