[Contrib] Add GdbServer endpoint verification harness#5
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Python harness that drives a live mangosd through the GdbServer debug endpoint (doc/GdbServer.md) to check game-level breakpoint behaviour across thread boundaries: an off-thread breakpoint (netaccept) must not pause the world, an on-thread breakpoint (worldtick) must enter and leave the cooperative stop, and --crash-repro probes the monitor bridge for a socket-lifetime use-after-free. Standard library only; host/ports configurable.
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Companion to mangoszero#406 — the verification harness I used to test the GDB endpoint, so it's reproducible.
contrib/gdbServerVerify/gdb_verify.pydrives a livemangosdover the endpoint (RSP + monitor ports) and checks game-level breakpoint behaviour across thread boundaries:netaccept, fires on an ACE network thread) must NOT pause the world (tick keeps advancing, hit still counted).worldtick) must enter the cooperative stop and resume on$c+ detach.--crash-repro— parks the world thread on aworldtickstop, then has monitor clients submit a line and disconnect immediately so a queued request outlives its socket; a correct server survives, a use-after-free crashes it (the issue fixed in [Debug] Fix monitor-bridge use-after-free in GdbServer #4).Standard library only, host/ports/crash-dir configurable, run against a test server with
GdbServer.Enable = 1. This is the harness that produced the runtime PASS results and the UAF repro noted on mangoszero#406. Independent branch off your current head; no code changes, just the tool undercontrib/.