<div dir="ltr">Hi All,<div><br></div><div> I've a bit of a mystery and could do with suggestions of what to look for. The 64-bit Spur StackInterpreter VM on linux was working fine up until a few months ago. Now it doesn't respond to input, unless that is, I put various breakpoints on various functions along the chain from aioPool through to allocateInputEvent to signalExternalSemaphore to doSignalExternalSemaphores when ... it can suddenly start working?! I'm planning to add a -debugeventchain flag or some such and if set write a different character to stderr form each function along the chain so I can see where the blockage is, but I fear heisenbugs; doing output could perturb the system into working (given that gdb can perturb the system also). And I'm lazy so I wondered if anyone had a good idea. I've thought of it being thread-related but that's not the case as all event processing in X11 happens on the main VM thread. Anyway, I'm open to suggestions.<br>-- <br><div class="gmail_signature">best,<div>Eliot</div></div>
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