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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 | for IO::Socket::INET connections, what should i do on EAGAIN when SO_SNDTIMEO/SO_RCVTIMEO is used with the socket? | 01:32 | |
| Xliff | m: class A { }; my A $a = Nil; | 03:33 | |
| evalable6 | |||
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| timotimo | yesterday i found out that out of 466k collectables in this one heap snapshot file, about 261k collectables have only a single outgoing reference | 11:42 | |
| today, i want to find out if there's potential for deduplication at all | |||
| 28.5k collectables had only two outgoing refs, probably not worth as much, though i should give it a try anyway | 11:48 | ||
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| Kaiepi | uhhhhh | 21:07 | |
| moarvm may potentially be vulnerable to ROP | |||
| openbsd has a feature called retguard that protects against it, but can be disabled by passing -fno-return-protector to clang and that fixes nearly all the page traps i get when i try to run perl6 | 21:08 | ||
| s/page trap/trace trap/ | 21:10 | ||
| timotimo | does it work fine when the jit is turned off? | 21:13 | |
| it probably has to write its own return protection data somewhere for it to not explode every time it returns from inside jit code | 21:14 | ||
| Kaiepi | yes, this is with the jit turned off and with -fno-ret-protector enabled | 21:16 | |
| er | 21:17 | ||
| the jit's enabled | |||
| timotimo | and with ret protector turned on, does turning off the jit make things work again? | 21:18 | |
| Kaiepi | yes | ||
| timotimo | OK | ||
| the return protector stuff is a CPU feature that has the same API on all OSes? | 21:19 | ||
| or do we have to build platform-specific support for it? | |||
| Kaiepi | -fno-ret-protector is openbsd specific | 21:30 | |
| so probably platform specific depending on what security features they have | 21:31 | ||
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