fix(agc): harden host import construction and mutation waits - #2779

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Windows/NVIDIA validation — RTX 5070

Tested PR #2779 on Windows 11 using an NVIDIA RTX 5070 and MinGW-w64 GCC 15.2.0.

Revisions

• Baseline: 5edae35361e9b7f7061f28c6e80ed075312b8105
• PR: db76c694378824b950a74565ec4aa458d52db5cf
• NVIDIA driver: 610.47 (Vulkan 1.4.341, Subgroup size 32)

Results

• Targeted tests: 15 passed, 0 failed, 2 skipped (unit shadow tests cleanly exit code 77 due to Windows memory-comparison host import model)
• Baseline defect reproductions:
  • agc_driver_host_import_lifetime: failed (timeout waiting 2000 ms for lease; unreleased kept lease in deferred batches)
  • agc_driver_host_import_mutation_race: failed (registry lock left unlocked on pin waiter exception)
• PR-side results: both lifetime and mutation-race tests pass cleanly
• Repeated stress tests: 80/80 passed (20 iterations each across host_import_lifetime, host_import_mutation_race, guest_memory_lifetime, and host_import_teardown)

Notable observations

• The deferred-keep lease timeout during synchronous waits was reproduced on baseline both via dynamic PRX redirection and native test compilation, and is resolved by Recorder::ReleaseCompletedKeeps().
• The registry mutex leak on pin-waiter exceptions was reproduced on baseline and is resolved by exception-safe lock recovery.
• No Vulkan device losses (VK_ERROR_DEVICE_LOST), crashes, or timeouts were observed across all 80 executed stress runs on the RTX 5070.

Limitations

• Validation is specific to Windows 11 / NVIDIA RTX 5070 / MinGW-w64 GCC 15.2.0.
• Unit shadow tests skip on Windows as host imports do not support page write-watching on this platform.
• Full AnyPS5 emulator integration suite was not executed; coverage is confined to the targeted graphics and memory driver suites.
• No heap profiler measurements were taken to formally evaluate memory consumption over extended workloads.

Conclusion
The evidence on Windows 11 / NVIDIA RTX 5070 confirms that PR #2779 fixes the reproduced lease timeout and registry lock inversion bugs without introducing observed regressions in the tested AGC driver paths. Full validation logs and per-iteration records are preserved locally.

Windows/NVIDIA validation, as asked on #2575. Setup: Windows 10 (19045), RTX 3060 Laptop (NVIDIA 616.92), MinGW-w64 GCC 15.2.0 (WinLibs r7), Release. Head db76c694, merged onto main ca34953 (together with justdoston's select/poll branch from #1471, which touches only Socket.cpp, Udp.cpp and GuestPoll.cpp).

• All ten lifetime and import tests run, with none skipped, and pass in 20 of 20 rounds: agc_host_import_unmap, agc_driver_host_import_lifetime, agc_driver_host_import_mutation_race, agc_driver_host_import_teardown and the six agc_driver_guest_memory_lifetime* variants (copy, direct, locked, heap, heap_uncached).
• Full ctest: 719 of 719 in two of three runs. In the other run, agc_driver failed once with 0xc0000374 under -j 8. It then passed 10 of 10 on its own, and I haven't measured its rate on main, so I can't tell whether it relates to this change.

🤖 Addressed by Claude Code