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Welcome to the main channel on the development of MoarVM, a virtual machine for NQP and Rakudo (moarvm.org). This channel is being logged for historical purposes. Set by lizmat on 24 May 2021. |
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| MasterDuke | i'm afraid it'll be no more debugging for me tonight, off to bed | 00:09 | |
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| Nicholas | good #moarvm, * | 08:12 | |
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| jnthnwrthngtn | o/ | 10:24 | |
| Nicholas | \o | 10:25 | |
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| dogbert17 | at least the repl.t bug seems to be consistent, i.e. always crashing in the same place | 14:23 | |
| and relatively easy to repl(icate) :) | 14:24 | ||
| MasterDuke | it's crashing in an is-run test, right? | 14:33 | |
| i guess something in the parent process is corrupting the memory state of the child | 14:37 | ||
| i think there's a way to get rr to record parent+child | 14:38 | ||
| dogbert17 | it seems to be called is-run-repl | ||
| using asan seems to scare the bug into hiding | 14:39 | ||
| ah, where is timo, he should show up given that you mentioned rr | 14:41 | ||
| MasterDuke | does it repro under valgrind? | ||
| jnthnwrthngtn | I thought by definition one process can't corrupt the memory of another, at least on any modern OS | 14:42 | |
| nine | As long as you're running on hardware with an MMU (which unless you *know* otherwise, you are) | 14:44 | |
| MasterDuke | hm, right. maybe not corrupting *after* the process has been started, but starting it with a corrupted state? | 14:46 | |
| iirc the actual code being run in the tests isn't terribly complicated, so any problem is likely in what's being used to execute them | 14:47 | ||
| nine | The influence that the starting process has is usually by affecting the environment variables which can affect memory layout which can decide e.g. whether some uninitialized memory contains data that the process stumbles over or not | 14:48 | |
| dogbert17 | nine: if you missed it yesterday, here's the backtrace | 14:49 | |
| (gdb) bt | |||
| #0 0x00007f9659cb1d6e in MVM_interp_run (tc=0x5632246e8e30, initial_invoke=0x0, invoke_data=0x0, outer_runloop=0xffff) at src/core/interp.c:259 | |||
| #1 0x000056322343f7fb in main (argc=7, argv=0x7ffe81e46cb8) at src/main.c:307 | 14:50 | ||
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| brrt | \o | 21:29 | |
| tellable6 | 2021-11-08T09:35:43Z #moarvm <Nicholas> brrt good *, brrt | ||
| dogbert17 | hello brrt | ||
| brrt | aw, that's a while ago | ||
| ohai dogbert17 | |||
| dogbert17 | nice seeing you around :) | 21:30 | |
| are you forced to stay inside due to the pandemic? | 21:32 | ||
| brrt | ehm, dutch government doesn't force you to stay inside, just to close shops, schools etc. | 21:33 | |
| thank god though | |||
| dogbert17 | forced might indeed have been a bit too strong | ||
| brrt | I can take a walk outside, and have been able to do so for all of 2020-2021 | ||
| well I have colleagues which were so forced! | 21:34 | ||
| unimaginable | |||
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| dogbert17 | I suspect other countries will follow suit soon and close shops etc | 21:36 | |
| brrt | I don't know | 21:41 | |
| I'm done reading tea leaves | |||
| dogbert17 | does that mean it's time to do some jit hacking? | 21:45 | |
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