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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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| Nicholas | * good * | 08:00 | |
| nine | It is a good * to * | 08:20 | |
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| Nicholas | aargh, flashbacks. [* TO *] | 08:39 | |
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| timo | [* TOTO *] Africa | 09:35 | |
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| MasterDuke | i don't recognize that syntax, what's it from? | 14:10 | |
| Nicholas | I met [* TO *] in kibana, but I think that ultimately it's from Lucene | 14:23 | |
| Voldenet | (makes sense, since kibana is using lucene) | 14:25 | |
| MasterDuke | huh, i've used lucene a bunch, but remember that | 14:28 | |
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| MasterDuke | ugh, problems in something like that itoa change were pretty easy to debug. e.g., "123" becomes 12...off-by-one. but this remove-spesh-candidate-if-too-many-deopts rebase... | 14:50 | |
| (rr) p spesh_cand->body.jitcode | 15:07 | ||
| $1 = (MVMJitCode *) 0xffffffff00000007 | |||
| nine | That...doesn't look right | 15:08 | |
| who wrote that value? | |||
| MasterDuke | so that's obviously not good. but then i do `watch -l spesh_cand->body.jitcode`, and `reverse-continue` | ||
| Old value = (MVMJitCode *) 0xffffffff00000007 | |||
| New value = (MVMJitCode *) 0x7 | |||
| 0x00007f91ff584060 in MVM_sc_set_collectable_sc (tc=0x559630c41e60, col=0x559630eb6d90, sc=0x7f91fe969d98) at src/6model/sc.h:125 | |||
| 125 col->sc_forward_u.sc.idx = MVM_DIRECT_SC_IDX_SENTINEL; | |||
| nine | Looks like a GC issue then? | 15:09 | |
| MasterDuke | yeah. which is annoying, because i thought i'd found all those with the original version of the branch | 15:10 | |
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| MasterDuke | and it's been a while since i've debugged those. missing MVMROOT perhaps? | 15:14 | |
| nine | That or a missing MVM_ASSIGN_REF | ||
| You may want to go back to the place where that spesh cand was created or assigned to a frame | 15:15 | ||
| MasterDuke | hm, could MVM_callstack_unwind_frame cause problems? | 15:30 | |
| hm, i thought adding spesh_cand to the MVMROOT here github.com/MoarVM/MoarVM/blame/mas...opt.c#L413 might help, but that by itself didn't. afk for a bit, but maybe something to investigate further when i get back | 15:34 | ||
| nine | Well it's definitely missing there | 15:42 | |
| Or access to spesh_cand replaced with frame->spesh_cand | 15:44 | ||
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| MasterDuke | nine: hm, but then i'm confused by github.com/MoarVM/MoarVM/commit/74...aca30b95b5 | 21:16 | |
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| nine | Oooh...well yes, then MVMROOT is indeed the only option. And that local variable should have gotten a comment | 21:47 | |
| MasterDuke | i added spesh_cand to the MVMROOT (now MVMROOT2 of course), but still get the exact same error. i looked through the rest of deopt.c, but didn't notice any others obviously missing | 21:59 | |
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