[Mesa-dev] Friday Night Segfaults

Mon Nov 7 13:21:18 PST 2011

As I posted on Friday, glReadPixels is broken.  I have a patch that 
will probably fix most of this.  I'll push it soon.

-Brian

On 11/07/2011 01:38 PM, Kevin H. Hobbs wrote:
> On 11/07/2011 03:29 PM, Kevin H. Hobbs wrote:
>> I build Mesa OSMesa and xlib from git every night, and then I build and
>> test VTK and ParaView against both Mesa libraries all of this on 9 hosts.
>>
>> Beginning Friday night basically all of the rendering tests started
>> failing with a solid color on OSMesa and segfaulting with xlib.
>>
>> I suspect Mesa because my builds seem to be the only ones on the VTK/PV
>> dashboards that suddenly had +300 test failures and I'm the only person
>> nutty enough to test VTK/PV with Mesa from git.
>>
>> I'm rebuilding in debug now to try and track down the segfault, but
>> somebody might have an idea now.
>>
>
> One run of a segfaulting test and my gdb session follows:
>
>
> [kevin at bubbles VTK_Xlib_Build]$
> /home/kevin/kitware/VTK_Xlib_Build/bin/GraphicsCxxTests
> "BoxClipPolyData" "-D" "/home/kevin/kitware/VTKData" "-T"
> "/home/kevin/kitware/VTK_Xlib_Build/Testing/Temporary" "-V"
> "Baseline/Graphics/BoxClipPolyData.png"
> Segmentation fault
> [kevin at bubbles VTK_Xlib_Build]$ gdb
> /home/kevin/kitware/VTK_Xlib_Build/bin/GraphicsCxxTests
> GNU gdb (GDB) Fedora (7.2-51.fc14)
> Copyright (C) 2010 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later
> <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "x86_64-redhat-linux-gnu".
> For bug reporting instructions, please see:
> <http://www.gnu.org/software/gdb/bugs/>...
> Reading symbols from
> /home/kevin/kitware/VTK_Xlib_Build/bin/GraphicsCxxTests...done.
> (gdb) run "BoxClipPolyData" "-D" "/home/kevin/kitware/VTKData" "-T"
> "/home/kevin/kitware/VTK_Xlib_Build/Testing/Temporary" "-V"
> "Baseline/Graphics/BoxClipPolyData.png"
> Starting program:
> /home/kevin/kitware/VTK_Xlib_Build/bin/GraphicsCxxTests
> "BoxClipPolyData" "-D" "/home/kevin/kitware/VTKData" "-T"
> "/home/kevin/kitware/VTK_Xlib_Build/Testing/Temporary" "-V"
> "Baseline/Graphics/BoxClipPolyData.png"
> [Thread debugging using libthread_db enabled]
>
> Program received signal SIGSEGV, Segmentation fault.
> unpack_RGBA8888 (src=0x0, dst=0x7ffffffbcd60) at main/format_unpack.c:66
> 66         const GLuint s = *((const GLuint *) src);
> Missing separate debuginfos, use: debuginfo-install
> libICE-1.0.6-2.fc13.x86_64 libSM-1.1.0-7.fc12.x86_64
> libX11-1.3.4-4.fc14.x86_64 libXau-1.0.6-1.fc14.x86_64
> libXext-1.1.2-2.fc14.x86_64 libXt-1.0.7-1.fc13.x86_64
> libuuid-2.18-4.8.fc14.x86_64 libxcb-1.7-1.fc14.x86_64
> (gdb) bt
> #0  unpack_RGBA8888 (src=0x0, dst=0x7ffffffbcd60) at main/format_unpack.c:66
> #1  0x00007ffff65363db in _mesa_unpack_rgba_row (format=<value optimized
> out>, n=800, src=<value optimized out>, dst=<value optimized out>) at
> main/format_unpack.c:1256
> #2  0x00007ffff6526d34 in slow_read_rgba_pixels (ctx=0x8599a0, x=<value
> optimized out>, y=<value optimized out>, width=800, height=640,
> format=6407, type=5121, pixels=0xd28ce0,
>      packing=0x7fffffffce10, transferOps=2048) at swrast/s_readpix.c:251
> #3  0x00007ffff65271fa in read_rgba_pixels (ctx=0x8599a0, x=0, y=0,
> width=800, height=640, format=6407, type=5121, packing=0x869238,
> pixels=0xd28ce0) at swrast/s_readpix.c:296
> #4  _swrast_ReadPixels (ctx=0x8599a0, x=0, y=0, width=800, height=640,
> format=6407, type=5121, packing=0x869238, pixels=0xd28ce0) at
> swrast/s_readpix.c:508
> #5  0x00007ffff63ad097 in _mesa_ReadnPixelsARB (x=0, y=0, width=800,
> height=640, format=6407, type=5121, bufSize=2147483647, pixels=0xd28ce0)
> at main/readpix.c:269
> #6  0x00007ffff63ad2aa in _mesa_ReadPixels (x=<value optimized out>,
> y=<value optimized out>, width=<value optimized out>, height=<value
> optimized out>, format=<value optimized out>,
>      type=<value optimized out>, pixels=0xd28ce0) at main/readpix.c:277
> #7  0x00007ffff7b1a992 in vtkOpenGLRenderWindow::GetPixelData
> (this=0x6edf90, x1=0, y1=0, x2=799, y2=639, front=0, data=0xd28ce0
> "\030r9T6")
>      at /home/kevin/kitware/VTK/Rendering/vtkOpenGLRenderWindow.cxx:543
> #8  0x00007ffff7b1a610 in vtkOpenGLRenderWindow::GetPixelData
> (this=0x6edf90, x1=0, y1=0, x2=799, y2=639, front=0) at
> /home/kevin/kitware/VTK/Rendering/vtkOpenGLRenderWindow.cxx:412
> #9  0x00007ffff7aba8c5 in vtkWindowToImageFilter::RequestData
> (this=0xb85bf0, outputVector=0x82cb00) at
> /home/kevin/kitware/VTK/Rendering/vtkWindowToImageFilter.cxx:431
> #10 0x00007ffff7ab925a in vtkWindowToImageFilter::ProcessRequest
> (this=0xb85bf0, request=0xb8b800, inputVector=0x0, outputVector=0x82cb00)
>      at /home/kevin/kitware/VTK/Rendering/vtkWindowToImageFilter.cxx:203
> #11 0x00007ffff4af6aa9 in vtkExecutive::CallAlgorithm (this=0xb841a0,
> request=0xb8b800, direction=1, inInfo=0x0, outInfo=0x82cb00)
>      at /home/kevin/kitware/VTK/Filtering/vtkExecutive.cxx:747
> #12 0x00007ffff4adecc4 in vtkDemandDrivenPipeline::ExecuteData
> (this=0xb841a0, request=0xb8b800, inInfo=0x0, outInfo=0x82cb00)
>      at /home/kevin/kitware/VTK/Filtering/vtkDemandDrivenPipeline.cxx:507
> #13 0x00007ffff4ade352 in vtkDemandDrivenPipeline::ProcessRequest
> (this=0xb841a0, request=0xb8b800, inInfoVec=0x0, outInfoVec=0x82cb00)
>      at /home/kevin/kitware/VTK/Filtering/vtkDemandDrivenPipeline.cxx:279
> #14 0x00007ffff4ce080f in
> vtkStreamingDemandDrivenPipeline::ProcessRequest (this=0xb841a0,
> request=0xb8b800, inInfoVec=0x0, outInfoVec=0x82cb00)
>      at
> /home/kevin/kitware/VTK/Filtering/vtkStreamingDemandDrivenPipeline.cxx:276
> #15 0x00007ffff4adea73 in vtkDemandDrivenPipeline::UpdateData
> (this=0xb841a0, outputPort=0) at
> /home/kevin/kitware/VTK/Filtering/vtkDemandDrivenPipeline.cxx:449
> #16 0x00007ffff4ce0a40 in vtkStreamingDemandDrivenPipeline::Update
> (this=0xb841a0, port=0) at
> /home/kevin/kitware/VTK/Filtering/vtkStreamingDemandDrivenPipeline.cxx:326
> #17 0x00007ffff4ac8ca4 in vtkDataObject::Update (this=0xb87100) at
> /home/kevin/kitware/VTK/Filtering/vtkDataObject.cxx:1030
> #18 0x00007ffff7a7988e in vtkTesting::RegressionTest (this=0xb84bd0,
> image=0xb87100, thresh=10, os=...) at
> /home/kevin/kitware/VTK/Rendering/vtkTesting.cxx:426
> #19 0x00007ffff7a79516 in vtkTesting::RegressionTest (this=0xb84bd0,
> thresh=10, os=...) at /home/kevin/kitware/VTK/Rendering/vtkTesting.cxx:387
> #20 0x00007ffff7a792ad in vtkTesting::RegressionTest (this=0xb84bd0,
> thresh=10) at /home/kevin/kitware/VTK/Rendering/vtkTesting.cxx:344
> #21 0x00007ffff7a7af2d in vtkTesting::Test (argc=7, argv=0x7fffffffda90,
> rw=0x6edf90, thresh=10) at
> /home/kevin/kitware/VTK/Rendering/vtkTesting.cxx:698
> #22 0x000000000045a349 in BoxClipPolyData (argc=7, argv=0x7fffffffda90)
> at /home/kevin/kitware/VTK/Graphics/Testing/Cxx/BoxClipPolyData.cxx:313
> #23 0x0000000000425fd5 in main (ac=7, av=0x7fffffffda90) at
> /home/kevin/kitware/VTK_Xlib_Build/Graphics/Testing/Cxx/GraphicsCxxTests.cxx:429
>
>
>
>
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