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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nine -join #raku-steering-council 07:36
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nine dogbert2: I can reproduce! In rr! while MVM_SPESH_BLOCKING=1 MVM_JIT_DISABLE=1 rr record /home/nine/rakudo/install/bin/moar --execname=/home/nine/rakudo/rakudo-m --libpath=/home/nine/rakudo --libpath=/home/nine/rakudo/blib --libpath=/home/nine/rakudo/install/share/nqp/lib /home/nine/rakudo/rakudo.moarvm -Ilib t/02-rakudo/14-revisions.t ; do true ; done 09:40
dogbert2: that's the segfault when reading &ctx->legacy.args[i].o due to garbage in *ctx (version 1 MVMArgs and broken pointers) 09:41
MasterDuke obvious fix? 09:51
nine if only :) 10:09
dogbert2 nine: very cool, so there's plenty to do while jnthnwrthngtn is on vacation 10:11
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nine Good news (for my sanity if nothing else). The missing case MVM_SPESH_ANN_DEOPT_PRE_INS in PEA's add_deopt_materializations_ins is actually critical as well. It's just that we also need to employ MVM_SPESH_ANN_DEOPT_SYNTH to see any difference. 16:28
So, yes indeed, to provoke that segfault from a working code base, just remove the case MVM_SPESH_ANN_DEOPT_PRE_INS.
MasterDuke any reason not to merge github.com/MoarVM/MoarVM/pull/1472 ? 16:38
nine Not from my side 16:42
No Geth? :( 16:48
Geth MoarVM/new-disp: 3445403032 | (Stefan Seifert)++ | 2 files
Fix segfault after deopt due to missing materialization

A dispatch op may get replaced with several guards during optimization. When doing this, the first created guard inherits the deopt annotation of the original instruction. Further guards got clones of the annotation. While these clones would point at the correct place in the bytecode to deopt to, they would get newly allocated deopt indexes. PEA materializations are tied to deopt ... (9 more lines)
nine Oh, just slow spesh :) Well, this ^^^ takes care of last weekend's segfault in t/spec/S12-methods/parallel-dispatch.t
s/slow spesh/slow/Geth/ 16:50
lizmat actually, it's slow Github Webhooks 16:52
www.githubstatus.com shows Webhooks "Degraded" 16:53
nine Well, better late than never 16:56
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Geth MoarVM/master: 6 commits pushed by (Nicholas Clark)++, MasterDuke17++ 19:37
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