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retrocpugeekandClaude Opus 4.8
c5a8a9b73e
The stub drove continue by calling emu_start synchronously and only read the socket again once the target stopped on its own, so the bare \x03 break byte a client sends to pause a running target was never seen. A guest that free-runs (e.g. an idle/event loop) could not be interrupted at all -- gdb/Ghidra reported 'Cannot execute this command while the target is running'. Poll the client socket for the break byte from the per-instruction run hook (dbg_hook), which does run on the emulation thread during emu_start: - GdbSerialConn.poll_interrupt(): non-blocking select+recv, True on \x03. - QlGdbUtils.dbg_hook: throttled (every INTR_POLL_INTERVAL insns) check of an installed check_interrupt callback; on a break, stop emulation and record it. - handle_c: reply SIGINT when the stop was an interrupt rather than a breakpoint or normal exit. Add a regression test that lets an infinite-loop guest free-run, sends the bare break byte and asserts the stop-reply is 'S02' (SIGINT). Without the fix no reply ever arrives, so the test stops the guest itself and fails rather than hanging the run. Also verified against a free-running MIPS64 BE guest: \x03 -> S02 in <1ms. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
This folder includes the testsuite for CI, such as Travis.