Build a comprehensive JIT resilience layer that prevents silent black screens when iOS revokes the CS_DEBUGGED grant after approximately 30 to 60 seconds of app inactivity. Add a ValidateJITAlive helper to DarwinMisc that re-probes CS_DEBUGGED via csops and writes a canary byte to the JIT RW alias to detect whether the mapping is still writable, covering the case where the flag lingers but the underlying grant is already dead. Add a 12-second dispatch timer in SceneDelegate that calls ValidateJITAlive while the VM is idle, skipping during active gameplay since the recompiler keeps JIT in constant use, and posts a JITExpired notification on detection. Add interpreter fallback to the boot gate so that when JIT is dead the app falls back to the pure EE, IOP, VU0, and VU1 interpreter instead of blocking boot, wiring up the previously dormant iPSX2_FORCE_EE_INTERP flag and fixing applyFullInterpreterPreset to actually write EnableEE equals false since CoreType was an iOS-UI-only concept the C++ core ignored. Skip executable code-memory allocation in Memory.cpp when in interpreter mode since the interpreter does not generate native code, and null-guard SetJitRange to prevent recording bogus JIT ranges. Add a 15-second VM init watchdog that catches TXM prepare hangs and shows an error dialog instead of leaving a permanent black screen. Add an 8-second timeout to the Universal TXM prepare path by running the brk number 0xf00d cycle on a detached worker thread with thread_local sigjmp_buf, falling back to the Legacy brk number 0x69 protocol on timeout. Add re-boot JIT revalidation so the persistent VM thread validates JIT before signaling, resetting to interpreter mode with s_vmThreadShouldExit to cleanly tear down and recreate the thread with paired CPUThreadShutdown. Restore recompiler settings and fastmem when JIT returns on next app launch. Add the design spec and a user-facing JIT troubleshooting guide documenting black screen causes, interpreter fallback expectations, diagnostic log markers, and workarounds.
Port the complete JIT and write-xor-execute infrastructure to DarwinMisc with four JitModes (Simulator, Legacy, LuckTXM, LuckNoTXM), dual-mapping via vm_remap for writable code aliases, the csops CS_DEBUGGED probe for JIT availability detection, brk assembly helpers for the TXM protocol, and the W^X toggle functions. Connect the JIT foundation to the code emitters through AsmHelpers dual-map bridge, Memory.cpp MmapCodeDualMap allocation, and the aR5900 LegacyEnsureExecutable path. Refresh the iOS SwiftUI frontend from the iOS-refresh branch, bringing in 11 missing and 20 drifted Swift files plus ios_main.mm integration. Switch the CI to a real device build using the iphoneos SDK. Fix the Achievements crash by gracefully degrading when no HTTPDownloader is available (no CURL on iOS). Fix the Metal surface to reuse the UIView's existing CAMetalLayer instead of an orphaned allocation that caused half-screen crops. Fix GS memory allocation by using mmap and vm_remap instead of shm_open which is blocked by the iOS sandbox. Suppress the false positive Graphics not Automatic OSD warning. Merge upstream master and resolve all resulting compile errors.
Merge upstream PCSX2 (jpolo1224/master @ 1ae2a96747) into the monorepo refactor branch. Resolved GSDeviceMTL.mm: kept the fork's per-cmdbuf encoder counter and MetalFX-spatial feature, plus upstream's new ROV feature flag.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Jeen
David IsztlandClaude Opus 4.8
chaoticgd
jpolo1224
TellowKrinkle
Ziemas
SternXD
NightFyre
refractionpcsx2
TheTechnician27
GovanifY
Stenzek
Benjamin Moir