swung0x48 d5ed139cc5 [MG_Remote, MG_Test] (Disaggregated): P5f fc - the EGL control plane crosses as value frames, not function pointers ...

The twelve Server* forwarders' one-slot mailbox carried a raw function
pointer plus a void* to a stack-local Args struct (P5c audit row G4);
neither means anything across a process boundary. The slot now carries
one SurfaceControlFrame by value: kind is the op, scalars are the
arguments, and ok/eglMajor/eglMinor come back in the same value. The
blocking handshake, the shadow, the doorbell order and the C2 exit
block are unchanged.

- protocol.fbs: append-only - SurfaceOpKind gains SetSwapInterval=8,
  ReleaseResources=9, SetWindowHandle=10; WindowKind gains MetalLayer=6;
  SurfaceOp gains readSurface and context (the MakeCurrent four-tuple).
  protocol_generated.h regenerated with the pinned flatc.
- Server/SurfaceControlFrame.{h,cpp}: the frame (trivially copyable by
  static_assert) and the op enum - ten wire kinds plus four inproc-only
  kinds (InitCapabilities is answered by CapsSnapshot on the wire,
  SwapBuffers/InitWindowSurface have no production caller - f0-egl F8,
  kept for the inproc test lane).
- Protocol/SurfaceOpCodec.{h,cpp}: the frame <-> SurfaceOp/SurfaceReply
  codec, the explicit WindowBackend <-> WindowKind table, and the wire
  entry ServerApplyWireSurfaceOp whose refusals are named:
  Fatal{UnmigratedSurface, "AndroidNativeWindow@P12"} and
  Fatal{ProtocolCorruption, "SurfaceOp"}.
- ServerLoop: RunOnApplyThread(fn, void*) -> RunSurfaceControlFrame(frame)
  plus the dispatch ApplySurfaceControlFrame; the old per-forwarder Args
  bodies moved into the dispatch unchanged (C7/ID-54, N-3, R-12 included).
  RunProbeOnApplyThreadForTesting is the test seam through the same
  channel (the hook lives in a member, never in the slot).
- Tests: RemoteClientTest/ServerLoopTest migrated to the probe seam; new
  SurfaceControlFrameTest suite (mapping tables, wire round-trips, the
  two named refusals) plus ServerLoopTest's AVoidForwarderCrossesAsOne-
  DispatchedFrame (the frame channel's red-once handle) and
  ServerLoopEglTest's TheInitializeDisplayReplyArrivesThroughTheFrame.

2026-09-19 20:30:21 -04:00

..

Disaggregated

[MG_Remote, MG_Test] (Disaggregated): P5f fc - the EGL control plane crosses as value frames, not function pointers

2026-09-19 20:30:21 -04:00