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[Bug 976293] Blender 2.77a in Tumbleweed snapshot 20160416 crashes upon start
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Wed, 04 May 2016 12:41:51 +0000
  • Message-id: <bug-976293-21960-L8gdiFp02I@http.bugzilla.suse.com/>
http://bugzilla.suse.com/show_bug.cgi?id=976293
http://bugzilla.suse.com/show_bug.cgi?id=976293#c31

--- Comment #31 from Giuseppe Gorgoglione <gorgoglione@xxxxxxxxx> ---
Luckily the crash is very deterministic. It happens in thread 0 and a partial
stacktrace is this.

1 ED_region_do_draw area.c 479 0x10ce110
2 wm_method_draw_overlap_all wm_draw.c 289 0x9c5164
3 wm_draw_update wm_draw.c 953 0x9c8b84
4 WM_main wm.c 495 0x9bdbc8
5 main creator.c 2102 0x96b855

ED_region_do_draw() is called many times without problems but at a certain time
it crashes. I'm still investigating to find the exact crashing spot.

I can do source level debugging for blender itself but not for the crashing
spot.
Nevertheless it is also very deterministic and the disassembly looks like this:

0x7f3282a621aa 83 c7 0c add $0xc,%edi
0x7f3282a621ad 18 d2 sbb %dl,%dl
0x7f3282a621af c4 41 31 ef c9 vpxor
%xmm9,%xmm9,%xmm9
0x7f3282a621b4 c4 41 29 ef d2 vpxor
%xmm10,%xmm10,%xmm10
0x7f3282a621b9 44 39 f7 cmp %r14d,%edi
0x7f3282a621bc 77 6d ja
0x7f3282a6222b
0x7f3282a621be c4 c1 79 92 c7 kmovb %r15d,%k0
0x7f3282a621c3 c5 f8 93 f8 kmovw %k0,%edi
0x7f3282a621c7 81 e7 01 00 00 00 and $0x1,%edi
0x7f3282a621cd c4 41 29 ef d2 vpxor
%xmm10,%xmm10,%xmm10
0x7f3282a621d2 40 84 ff test %dil,%dil
0x7f3282a621d5 75 54 jne
0x7f3282a6222b
0x7f3282a621d7 81 e3 01 00 00 00 and $0x1,%ebx
0x7f3282a621dd c5 f8 92 c3 kmovw %ebx,%k0
0x7f3282a621e1 c5 f8 93 f8 kmovw %k0,%edi
0x7f3282a621e5 81 e7 01 00 00 00 and $0x1,%edi
0x7f3282a621eb c4 41 29 ef d2 vpxor
%xmm10,%xmm10,%xmm10
0x7f3282a621f0 40 84 ff test %dil,%dil
0x7f3282a621f3 75 36 jne
0x7f3282a6222b
0x7f3282a621f5 81 e2 01 00 00 00 and $0x1,%edx
0x7f3282a621fb c5 f8 92 c2 kmovw %edx,%k0
0x7f3282a621ff c5 f8 93 d0 kmovw %k0,%edx
0x7f3282a62203 81 e2 01 00 00 00 and $0x1,%edx
0x7f3282a62209 c4 41 29 ef d2 vpxor
%xmm10,%xmm10,%xmm10
0x7f3282a6220e 84 d2 test %dl,%dl
0x7f3282a62210 75 19 jne
0x7f3282a6222b
0x7f3282a62212 48 98 cltq
0x7f3282a62214 62 d1 fe 08 7e 0c 01 vmovq
(%r9,%rax,1),%xmm1
0x7f3282a6221b 62 d3 75 08 21 4c 01 02 20 vinsertps
$0x20,0x8(%r9,%rax,1),%xmm1,%xmm1

The crash is always on line 7, "kmovb %r15d,%k0", which is an AVX-512
instruction.

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