Commit Graph
3 Commits
Author SHA1 Message Date
enricobuehler 5219107177 chore(unsafe): the workspace adopts the drivers' unsafe discipline
`packaging/windows/drivers/*` has run `deny(unsafe_op_in_unsafe_fn)` +
`deny(clippy::undocumented_unsafe_blocks)` for a while, with `forbid(unsafe_code)`
on the modules that need no unsafe at all. The main workspace had no lint config
whatsoever, so nothing stopped a clean crate from quietly growing an `unsafe`, and
nothing distinguished the handful of genuinely-unsafe lines inside a 600-line
`unsafe fn` from the safe ones surrounding them.

Three things, all mechanical:

* `#![forbid(unsafe_code)]` on the eight crates that already contain zero unsafe
  (`pf-driver-proto`, `pf-host-config`, `pf-paths`, the three clean clients, both
  tools). These were clean by accident, not by contract; now they are clean by
  contract.

* `unsafe_op_in_unsafe_fn = "warn"` workspace-wide. `unsafe fn` states a contract
  the CALLER must uphold — it was never meant to switch off checking for the whole
  body. Measured fallout is 300 sites on Linux, and they are concentrated: six
  files carry all of them, while `punktfunk-core`, `pf-frame`, `pf-clipboard` and
  `pf-vdisplay` are already at zero. `warn` (not `deny`) so the build stays green
  while those six are worked down; it flips to `deny` once they are. This is also
  the Rust 2024 default, so it pays off the edition migration early.

* `proc::current_uid()` replaces eight `unsafe { libc::getuid() }` blocks. Each
  site had copied out the same SAFETY note verbatim, which is the tell: `getuid()`
  is parameterless, always succeeds and touches no memory, so there is no contract
  for a caller to uphold and no reason for the unsafe to be visible eight times.
  One `unsafe` behind a safe wrapper, none at the call sites.

Verified: `pf-vdisplay` builds clean on Linux (Nobara) at zero E0133; the
macOS-buildable crates build clean locally. No behaviour change.
2026-07-28 21:31:41 +02:00
enricobuehlerandClaude Fable 5 ba89b9fcd0 feat(tools): display-disturb learns the bench moves the field sessions needed
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Three upgrades from the on-glass rounds on .173/.221:

- `ddc-open` timing: the handle-ACQUISITION cost per monitor is reported even
  when it yields no physical handles — the poller's first contact with a
  virtual display, exactly what the DDC-fail-fast driver work changes; the
  old code silently skipped handle-less monitors, which on a streaming host
  in exclusive topology is every monitor there is.
- Monitors are labeled by GDI device name (\\.\DISPLAYn) so a virtual
  display and a panel are tellable apart in the correlation log.
- `extend` mode: one SDC_TOPOLOGY_EXTEND poke — re-activates every
  attachable display, i.e. the exact 'non-managed display re-activated'
  event the exclusive watchdog evicts. One shot, not a loop: trigger a
  reassert round, observe the recovery.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-27 17:52:31 +02:00
enricobuehlerandClaude Fable 5 9e1a686795 feat(tools): display-disturb — deterministic display-stack disturbance generator
The stall-immunity bench needs both stall classes on demand, without a standby
TV or a monitor-tool storm: `ddc` replays the Twinkle-Tray/PowerDisplay-class
DDC/CI traffic (VCP reads, optional capabilities-string requests) through the
win32k I2C path; `modeset` re-commits the current mode with CDS_RESET — the
Level-Two modeset entry that idles the whole adapter with nothing Win32-visible
changing. Every op prints an epoch-stamped took_ms line so host.log stall
reports correlate line-for-line, and the op duration itself measures the
driver's service time per disturbance.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-27 15:24:20 +02:00