I don't know the VBO code that well, so I'm asking you guys if this has ever come up before.
http://bugs.winehq.org/show_bug.cgi?id=22000 Gallium and indexed rendering are not very happy with each other. I get some fairly solidly reliable segfaults with both a d3d9 DLL test (device.ok) and Civ4 (Steam version). Hardware is a Radeon R580 (X1900), driver is r300g from Mesa git. My current guess, based on the Mesa debug info I dumped, is that the indexed rendering code is slightly baked and maybe trusting the underlying GL driver a bit too much. get_arrays_bounds: Handling 2 attrs attr 0: stride 16 size 12 start (nil) end 0xfffffffc attr 1: stride 16 size 4 start 0xc end (nil) buffer range: (nil) 0xfffffffc range -4 max index 4294967295 So right here (from device.ok) we have interleaved userspace VBO, that is being prepped inside core Mesa. Two delightful things here; the first attr seems way off-base, it shouldn't dare be giving us bad pointers, and the second attr's pointers don't even line up! Compare to a sane program (Mesa's drawarrays): get_arrays_bounds: Handling 2 attrs attr 0: stride 16 size 12 start 0x8087020 end 0x808705c attr 1: stride 16 size 4 start 0x808702c end 0x8087060 buffer range: 0x8087020 0x8087060 range 64 max index 3 r300g doesn't really care. The kernel drops the rendering on the floor for a variety of reasons, not least being the ridiculous max_index. But then it segfaults, and I have zero idea why. I'd guess it's something to do with tossing around NULL pointers like candy, but I'm honestly not sure and I haven't really dug into the DLL code yet. -- Only fools are easily impressed by what is only barely beyond their reach. ~ Unknown Corbin Simpson <mostawesomed...@gmail.com> ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
