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Geth | MoarVM: 736cfaa1e5 | (Zoffix Znet)++ | src/6model/reprs/VMArray.c Zero out cut off elements when downsizing VMarray Fixes RT#127756: rt.perl.org/Ticket/Display.html?id=127756 If we're downsizing, zero out the elements we're cutting off, to avoid rogue left over data showing up when we, say, index into those elements later on. ... (6 more lines) |
06:46 | |
synopsebot | RT#127756 [new]: rt.perl.org/Ticket/Display.html?id=127756 setelems on native arrays doesn't clear the array | ||
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Zoffix | FWIW: realized above commit is crap and working on another one, but it's not that good either and is breaking splicing. Trying to figure it out ATM, but may have a nap before I change the above commit | 09:12 | |
Current version: gist.github.com/zoffixznet/cd550a4...a2172c606b feels like `if (repr_data->slot_type != MVM_ARRAY_OBJ)` shouldn't be needed, but without it, even empty script dies with "unknown QAST node VMNull" | 09:13 | ||
and splice issue is this gist.github.com/zoffixznet/3017d65...91a1f6340c causes this drift... array[int64].new(0, 1, 2, 3, 4, 5, 6, 7, 0, 0, 10, 11) two zeros before "10, 11" that shouldn't be there.... | 09:18 | ||
ooh fixed stuff; including the MVM_ARRAY_OBJ thing | 09:57 | ||
\o/ | |||
samcv | happy christmas eve everyone | 10:12 | |
yoleaux | 23 Dec 2017 12:19Z <AlexDaniel> samcv: TIL, maybe you're interested to know this too. 兆 has a unival of 1000000000000 but you can't use it in the source code because its general category is Lo (so it thinks that it's an identifier) | ||
Zoffix | Happy to you too \o | 10:17 | |
Geth | MoarVM: 888f7b74d1 | (Zoffix Znet)++ | src/6model/reprs/VMArray.c Revert "Zero out cut off elements when downsizing VMarray" This reverts commit 736cfaa1e5f4ea6b7ce58320c918059a53b68cc5. This doesn't fix all cases of the issue and the real problem is further down the line. |
10:20 | |
MoarVM: 43c926f9e0 | (Zoffix Znet)++ | src/6model/reprs/VMArray.c Fix failure to clear old VMArray elements in some cases Fixes RT#127756: rt.perl.org/Ticket/Display.html?id=127756 (O = Old cell; N = new cell; G = garbage left over data) We currently correctly handle the case where we're up-sizing: |--|OO|OO|--| ... (18 more lines) |
10:37 | ||
synopsebot | RT#127756 [new]: rt.perl.org/Ticket/Display.html?id=127756 setelems on native arrays doesn't clear the array | ||
Zoffix | Ahhhh... Feels good to spend a few hours on a bug and fully understand why it was happening \o/ | ||
naptime | |||
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travis-ci | MoarVM build errored. Zoffix Znet 'Revert "Zero out cut off elements when downsizing VMarray" | 10:57 | |
travis-ci.org/MoarVM/MoarVM/builds/320983102 github.com/MoarVM/MoarVM/compare/7...8f7b74d112 | |||
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Geth | MoarVM: 09482f9bdd | (Zoffix Znet)++ | src/6model/reprs/VMArray.c Do less work in zeroing out VMArray We don't need to go up all the way to ssize, just until the old end of the stuff with data. The rest is already cleared from back when we resized ssize. (O = Old cell; N = new cell; G = garbage left over data) |--|OO|OO|--| |OO|OO|GG|--| <- conditional moves the old stuff and zeros the trash |NN|NN|--|--| |
11:36 | |
MoarVM: cb4c1941a8 | (Zoffix Znet)++ | src/6model/reprs/VMArray.c Do even less work in VMArray clearing By skipping the area between original start+elems and ssize (O = Old cell; N = new cell; G = garbage; C = newly cleaned space) |--|OO|OO|OO|--| |OO|OO|OO|GG|--| ... (9 more lines) |
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travis-ci | MoarVM build passed. Zoffix Znet 'Do less work in zeroing out VMArray | 12:14 | |
travis-ci.org/MoarVM/MoarVM/builds/321000273 github.com/MoarVM/MoarVM/compare/4...482f9bdd27 | |||
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dogbert17 stumbles upon a bizarre Christmas SEGV | 18:01 | ||
Thread 1 "moar" received signal SIGSEGV, Segmentation fault. | |||
0x00007ffff76f9b55 in compute_allocation_strategy (tc=0x6049f0, repr_info=0x7ffff5e8d5e0, repr_data=0x4286870, st=0x7ffff5e76010) at src/6model/reprs/CStruct.c:214 | |||
214 bits = cstruct_repr_data->struct_size * 8; | |||
(gdb) bt | |||
#0 0x00007ffff76f9b55 in compute_allocation_strategy (tc=0x6049f0, repr_info=0x7ffff5e8d5e0, repr_data=0x4286870, st=0x7ffff5e76010) at src/6model/reprs/CStruct.c:214 | |||
#1 0x00007ffff76fa55b in compose (tc=0x6049f0, st=0x7ffff5e76010, repr_info=0x7ffff5e8db90) at src/6model/reprs/CStruct.c:339 | |||
#2 0x00007ffff764909f in MVM_interp_run (tc=0x6049f0, initial_invoke=0x7ffff7789e01 <toplevel_initial_invoke>, invoke_data=0x66cd90) at src/core/interp.c:2499 | |||
#3 0x00007ffff7789f66 in MVM_vm_run_file (instance=0x604010, filename=0x7fffffffe2ce "/home/dilbert/repos/rakudo/perl6.moarvm") at src/moar.c:401 | |||
#4 0x0000000000401459 in main (argc=10, argv=0x7fffffffde28) at src/main.c:256 | |||
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Geth | MoarVM/fix-null-concat: b563f3564e | (Zoffix Znet)++ | src/6model/reprs/VMArray.c Fix unwanted null strings in VMArray holes Whenever we read past end or zero out str VMArrays, stick empty strings instead of a null pointer there. Before: $ perl6 -e 'my str @a; @a[3] = "x"; dd @a' ... (6 more lines) |
23:29 | |
MoarVM: zoffixznet++ created pull request #767: Fix unwanted null strings in VMArray holes |
23:33 |