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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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| nwc10 | good *, #moarvm | 07:08 | |
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| jnthn | morning o/ | 10:23 | |
| tellable6 | 2021-02-07T09:43:59Z #moarvm <nwc10> jnthn paste.scsys.co.uk/594542 -- new-disp t/02-rakudo/15-gh_1202.t ASAN excitement | ||
| nwc10 | \o | 10:24 | |
| also, I'd not seen ASAN since then, but there are two slightly different traces whereby it can do a NULL pointer deref in src/core/interp.c:4361 | 10:25 | ||
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| MasterDuke | wow, thought i'd give gcc's static analyzer a go at the moarvm build. 32k log file written so far (but it does create very large ascii diagrams) and it seems to have hung on src/strings/shiftjis.o (well, 100% cpu and res is currently 15gb and rising) | 10:47 | |
| been going for 15min now | 10:48 | ||
| jnthn | Maybe the use switch/case in shift_jis_cp_to_index :) | 10:54 | |
| MasterDuke | i killed it. unfortunately doing so kills the whole make, so i need to see if there's a way to skip certain files | 10:57 | |
| bunch of `warning: dereference of NULL ...` and `warning: double-‘free’ of ...` | 11:02 | ||
| i can follow some of these dereference warnings, but i don't understand the double-free ones | 11:29 | ||
| here's one about MVM_spesh_pea_destroy_deopt_info gist.github.com/MasterDuke17/64794...49c584a508 if anybody wants to take a look | 11:32 | ||
| what would be the right thing to do here github.com/MoarVM/MoarVM/blob/mast...ray.c#L836 if s_repr_data is NULL here github.com/MoarVM/MoarVM/blob/mast...#L813-L814 ? | 11:40 | ||
| nine | MasterDuke: that's on gcc 10 I assume? | 12:55 | |
| MasterDuke | yeah | ||
| 10.2.0 | 12:56 | ||
| nine | waiting for 11 should be worth it :0 | ||
| The author claims a much lower false positive rate and loads of improvements in general compared to the alpha version in gcc 10 | 12:58 | ||
| MasterDuke | yeah, and i see you can annotate functions as malloc/free pairs, which i assume would be good for MVM_malloc/MVM_free/etc | 12:59 | |
| looks like gcc 11 should be released soon, guess i'll wait until then to revisit the analyzer | 13:02 | ||
| though my question about VMArray's copy_elems still stands | |||
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| MasterDuke | rebased github.com/MoarVM/MoarVM/pull/1426 and broke apart the commits into some smaller chunks | 16:10 | |
| nine | MasterDuke: is the VMArray question purely hyptothetical, or do you see that irl? | 16:34 | |
| MasterDuke | hypothetical | 16:41 | |
| nine | nqp: my @a := 1, 2, 3; my %b := nqp::hash; %b<a> := 1; nqp::splice(@a, %b, 1, 0) | 16:54 | |
| nqp-m: my @a := 1, 2, 3; my %b := nqp::hash; %b<a> := 1; nqp::splice(@a, %b, 1, 0) | |||
| n: my @a := 1, 2, 3; my %b := nqp::hash; %b<a> := 1; nqp::splice(@a, %b, 1, 0) | |||
| Darn...camelia is down. Anyway, it's not hypothetical anymore. This ^^^ actually segfaults due to the NULL pointer dereference. | 16:57 | ||
| MasterDuke: great spot! | |||
| MasterDuke | credit to the gcc analyzer | 17:03 | |
| lizmat | and yet another Rakudo Weekly News hits the Net: rakudoweekly.blog/2021/02/08/2021-...-remaster/ | 17:11 | |
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