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github.com/moarvm/moarvm | IRC logs at colabti.org/irclogger/irclogger_logs/moarvm Set by AlexDaniel on 12 June 2018. |
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| Kaiepi | at some point in the future i'm thinking of auditing moarvm and using unveil(2) on openbsd wherever applicable to help make it more secure | 16:22 | |
| thoughts? | |||
| this explains what pledge(2) and unveil(2) do, though pledge is pretty useless in our case www.openbsd.org/papers/BeckPledgeU...an2018.pdf | |||
| timotimo | sounds like a good idea | ||
| Kaiepi | if moar were split into separate processes for networking, file i/o, and stuff pledge would be useful, but atm it's not so i'd just be enabling everything with it | 16:26 | |
| timotimo | i haven't heard of unveil yet | 16:28 | |
| Kaiepi | it's new to openbsd 6.4 i think | 16:29 | |
| which is the current stable version | |||
| 6.5 is coming out soon, which is what i'm running | 16:30 | ||
| patrickb | Kaiepi: I don't fully understand your last comment in r#2818 | 16:37 | |
| yoleaux | 6 Apr 2019 23:10Z <jnthn> patrickb: GitHub organization invite sent; once you accept it you should have commit access. Welcome! :) | ||
| synopsebot_ | R#2818 [open]: github.com/rakudo/rakudo/issues/2818 [BSD] Cannot run perl6 without using LD_LIBRARY_PATH on OpenBSD | ||
| Kaiepi | gimme a sec patrickb, i'm in the middle of building rakudo for another issue i'm posting | ||
| patrickb | no hurry | ||
| timotimo | ok, so calling unveil once will make the entire filesystem except for one path disappear, and then you can put paths back with a limited rwxc | 16:41 | |
| Kaiepi | yep | 16:50 | |
| the difference in performance is pretty huge with MVM_JIT_DISABLE, to say the least | 16:54 | ||
| i'm still building rakudo | |||
| good work, jit team | |||
| i don't mean that passive-aggressively, it's just one op jitted recently screwing things up that's making me use MVM_JIT_DISABLE | 17:09 | ||
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| ugexe | what is he mystery op? | 17:16 | |
| the^ | |||
| you'd probably have to look at MVM_SPESH_LOG=log.txt output after it blows up | 17:17 | ||
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| Kaiepi | i'll find out when rakudo finishes building | 17:20 | |
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| Kaiepi | ugexe, how do i tell which op is to blame? there are several expr bails | 17:29 | |
| ugexe | i'd grep out the ops that bailed, filter to unique ops, then post the list from which i imagine we can identify any that were recently added | 17:30 | |
| i dont know if this will actually work | 17:31 | ||
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| ugexe | (MVM_SPESH_LOG=log.txt perl6 -e '...') && (cat log.txt|grep bail > log2.txt) && perl6 -e '.say for "log2.txt".IO.slurp.lines.map({ $_.match(/\s*(\w+) /)[0].Str }).unique.sort' | 17:33 | |
| i dug that out of my bash history | |||
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| Kaiepi | ugexe, R#2824 | 17:45 | |
| synopsebot_ | R#2824 [open]: github.com/rakudo/rakudo/issues/2824 Cannot install zef (or run much of anything without MVM_JIT_DISABLE) | ||
| ugexe | hmm nothing sticking out. since it seems possibly file related i would take a guess that reverting github.com/MoarVM/MoarVM/commit/e1...259df30667 and rebulding moar might be worth a shot | 17:49 | |
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| Kaiepi | ugexe, doesn't work | 18:03 | |
| unveil(2) could possibly be responsible if something required to run perl6 uses it | 18:04 | ||
| ugexe | you might have to manually bisect to figure it out | 18:05 | |
| which i generally do by just reverting some commit halfway between last release, make install, run script to see if its still broke, then repeat | 18:06 | ||
| MasterDuke | Kaiepi: does it work if you just use MVM_JIT_EXPR_DISABLE ? | ||
| ugexe | its not `make install` for moarvm doesn't require rebuilding anything else | ||
| s/not/nice/ | |||
| s/reverting some commit/resetting to some commit/ | 18:08 | ||
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| Kaiepi | .tell masterduke no it still segfaults | 18:11 | |
| yoleaux | Kaiepi: I'll pass your message to masterduke. | ||
| Kaiepi | .tell masterduke er, trace trap | ||
| yoleaux | Kaiepi: I'll pass your message to masterduke. | ||
| Kaiepi | for me it rebuilds everything whenever i reset to another commit ugexe | 18:13 | |
| guess it depends on which make you're using | |||
| ugexe | `make install` inside /MoarVM rebuilds rakudo (which is in another directory)? | 18:22 | |
| i didnt expect the makefile to be aware of that | 18:23 | ||
| Kaiepi | oh not rakudo | 18:47 | |
| just moarvm | |||
| wait am i supposed to rebuild nqp and moarvm after doing changes like reverting the fileno_fh jit templates ugexe? | |||
| ugexe | just moarvm | 18:48 | |
| Kaiepi | ok good because i didn't | ||
| i reaaalllly don't wanna manually bisect two different bugs on code that spans across three repos | 18:49 | ||
| i might write a script that takes a piece of code and does it for me | |||
| ugexe | the number of repos is spans does not matter unless you encounter a commit that required an nqp bump | 18:51 | |
| because you are just rebuilding moar and nothing else | |||
| Kaiepi | the file errors may or may not be a bug in nqp or rakudo, i'm not sure yet | 18:52 | |
| the trace trap i know is a legojit bug so it's not as annoying to bisect | |||
| ugexe | well whatever it is happens during precomp | 18:56 | |
| which creates files | |||
| github.com/rakudo/rakudo/blob/5145...#L263-L286 | 18:57 | ||
| perhaps you can use that to golf something | |||
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| timotimo | the stacktrace from things called by the jit is usually completely unusable. as in, even when you think you see something in it, it's probably just leftovers/garbage that'll totally mislead you given the chance | 19:31 | |
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| Kaiepi | i figured, timotimo | 22:12 | |
| timotimo | i can recommend rr to figure out what happens, but i'm not sure it runs on bsds | 22:13 | |
| though rr isn't the only recording/replaying framework around, right? | |||
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| ugexe | werent you saying something about using unveil or something now? | 22:58 | |
| are you sure that 2019.03 worked under whatever conditions you have now? | 22:59 | ||
| because what appears to me is that rakudo cant write to its site or home repositories | 23:00 | ||
| when its trying to precomp | |||
| and i'm not aware of anything since 2019.03 that should affect that | |||