Major. DropEveryTwinForEndedServerSession drops every twin with InProcessTeardown() answering true, which is exactly the case in which a texture / sampler twin's destructor does NOT scrub itself out of TextureImpl::g_boundTexturesCache / SamplerImpl::g_boundSamplersCache. The shadows kept raw pointers to freed twins; the next in-process session's twin allocated at a recycled address read "already bound" and skipped its glBindTexture / glBindSampler on a context where nothing was bound, so its uploads went to texture 0 and it rendered black. The drop now empties both shadows and puts the active-unit shadow back to 0 (the new context's GL_TEXTURE0). SanityTest EsprytServerSession.TheServerBackendsDestructionEmptiesTheTextureAndSamplerUnitShadows (split build only; the pull build is unchanged, G1).
SetLogForwarder forwards every server-role thread's line, which is right for a session child (the process is the session) and wrong for the display Activity's process, where MOBILEGL_IPC_ROLE=server makes every thread a server thread: the UI thread's surface callbacks and the listener's lines - naming other peers' addresses, Busy refusals included - went into the live client's control socket. And the forward was a blocking SendFrame under the global log mutex, so a client that stopped reading held that mutex and hung the UI thread at its next log line (surfaceDestroyed's Detach logs).
In-process, RunSession now installs SetSessionLogForwarder: only the session thread and the threads that opt in (the session's apply thread, SetThreadForwardsLogToPeer) forward, and the send happens after the log mutex is released, under a forward mutex of its own (WithLogBarrier takes both, so the flush ack still follows every send that began; a line logged by the send itself is not re-sent). The forked session child keeps SetLogForwarder unchanged; the pull build's Log() is unchanged (G1).
DirectGLES keeps the requested eglSwapInterval in a process global on purpose (a surface re-created mid-session re-applies it), and every server process used to serve one session. The in-process display server serves the next session in the same process, which then silently inherited the previous client's interval. The server backend's destruction under a transport now calls DirectGLES::ForgetRequestedSwapInterval() beside DropEveryTwinForEndedServerSession (split build only; the pull build is unchanged, G1).
- Client resize: eglResize on a headless client's server-owned surface only rewrote the backend's record of the window - the phone's SurfaceView kept its size - and the client's EGL state answered the size it asked for. The server now recognises the surface as its own (ServerLoop::m_serverOwnedSurfaces, per session) and resizes it as a geometry request (the lease re-taken by its holder, the display waited for), resizes the backend surface to the window's real extent and replies with it; BackendObject_Remote adopts that extent (ServerResizeServerOwnedWindowSurface).
- Size tracking: the client held ONE server-owned surface, so a second one took the first's geometry updates and releasing it left the first with none. ClientSession now tracks every server-owned surface and applies an extent to all of them (they share the server's one window).
- Size reports without the knob: Espryt's new extent publish fired for every window surface of a spawn/tcp session, including windows a client named itself without MOBILEGL_IPC_SURFACE=server, switching their consumer to the reallocating arm. ServerLoop now names its own leased window to the backend (MGPipeServerSetOwnedWindow, split-only) and Espryt publishes the extent only for that window.
AcquireFor(0, 0) granted the lease at once, at whatever the window reported - and right after a session that fixed the size, that is still the fixed size: setSizeFromLayout answers asynchronously, like setFixedSize. ServerDisplay now remembers the geometry last requested and the layout's last reported extent; a 0/0 request that follows a fixed one waits (within the geometry grace) for the layout's extent, or for any report after the request that is not the old fixed size. ServerDisplayTest.TheWindowsOwnSizeAfterAFixedSizeIsTheLayoutsNotTheStaleFixedOne.
- Major: the window-lost release was picked up only between drain batches (PumpControlRequest), and a client streaming frames keeps the command ring from emptying for seconds - surfaceDestroyed waited out its 3 s bound on the UI thread, answered TimedOut, and the session kept presenting into the destroyed window. DrainRing now checks the request after its latch check, before every pop. ServerLoopLatchTest.ALostServerWindowIsReleasedMidBatchWhileTheClientStreams streams a 4 s batch under Detach.
- Stop while streaming: mobilegl_server_stop_inprocess ended the session through loop.Stop(), whose batch and final drain of a ring the client keeps refilling could outlast the bounded join (Fatal{ApplyThreadJoinTimeout} aborts the display Activity's process). RunSession now calls ServerLoop::AbandonQueuedRecords() first when the server is stopping: the drain stops after the record in hand and the exit path declines the rest, as a ReverseChannelForfeit does. ServerLoopTest.StoppingTheServerUnderAStreamingClientLeavesTheQueueAndJoinsPromptly.
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