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Thread: Access violation in GeForceGLDriver (OS X 10.10.2, NVIDIA)

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  1. #1
    Junior Member Newbie
    Join Date
    Mar 2015
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    11

    Access violation in GeForceGLDriver (OS X 10.10.2, NVIDIA)

    Hey all,

    We are doing some internal testing and we have several machines where an EXC_BAD_ACCESS occurs inside the GeForceGLDriver.

    What all those machines have in common is that they have NVidia cards and are running Yosemite. I tried an older machine with a NVidia card running 10.9.2 and that works fine. On Windows rendering works fine with NVidia cards.

    Does anybody know more about this? Am I doing something wrong while rendering or is this a driver bug? I've been trying different ways of rendering, but haven't been able to find a workaround yet. Does anybody know a workaround?

    NVIDIA Corporation
    NVIDIA GeForce GT 750M OpenGL Engine
    4.1 NVIDIA-10.2.1 310.41.15f01
    4.10

    Here is part of a crash rapport:

    Process: Frontend [616]
    Path: /Applications/IFCviewer KUBUS/*/Frontend.app/Contents/MacOS/Frontend
    Identifier: Kubus.Frontend
    Version: 1.0 (1)
    Code Type: X86-64 (Native)
    Parent Process: ??? [1]
    Responsible: Frontend [616]
    User ID: 501

    Date/Time: 2015-04-03 11:35:40.797 +0200
    OS Version: Mac OS X 10.10.2 (14C1514)
    Report Version: 11
    Anonymous UUID: 00F4257A-5DD5-4939-85E6-08230642EC2A


    Time Awake Since Boot: 930 seconds

    Crashed Thread: 0 Dispatch queue: com.apple.main-thread

    Exception Type: EXC_BAD_ACCESS (SIGSEGV)
    Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000008

    VM Regions Near 0x8:
    -->
    __TEXT 000000010158e000-0000000101c61000 [ 6988K] r-x/rwx SM=COW /Applications/IFCviewer KUBUS/*/Frontend.app/Contents/MacOS/Frontend

    Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
    0 com.apple.GeForceGLDriver 0x000012344025a36b gldReadTextureData + 202073
    1 com.apple.GeForceGLDriver 0x000012344023c7d6 gldReadTextureData + 80324
    2 com.apple.GeForceGLDriver 0x0000123440259db8 gldReadTextureData + 200614
    3 com.apple.GeForceGLDriver 0x000012344001b0aa 0x123440000000 + 110762
    4 com.apple.GeForceGLDriver 0x000012344001c160 0x123440000000 + 115040
    5 com.apple.GeForceGLDriver 0x00001234400220eb 0x123440000000 + 139499
    6 com.apple.GeForceGLDriver 0x00001234400227a2 0x123440000000 + 141218
    7 com.apple.GeForceGLDriver 0x000012344032bb20 gldBlitFramebufferData + 66936
    8 com.apple.GeForceGLDriver 0x000012344032c372 gldBlitFramebufferData + 69066
    9 com.apple.GeForceGLDriver 0x000012344032c985 gldBlitFramebufferData + 70621
    10 com.apple.GeForceGLDriver 0x00001234402286e5 gldUnbindPipelineProgram + 3567
    11 com.apple.GeForceGLDriver 0x000012344032b719 gldBlitFramebufferData + 65905
    12 com.apple.GeForceGLDriver 0x0000123440319dc6 gldUpdateDispatch + 864
    13 GLEngine 0x00007fff905ae315 gleDoDrawDispatchCoreGL3 + 536
    14 GLEngine 0x00007fff9055eabb gleDrawArraysOrElements_Entries_Body + 128
    15 GLEngine 0x00007fff9055bd9e glDrawElementsBaseVertex_GL3Exec + 208
    16 Kubus.Frontend 0x0000000101609ba1 Viewer::OpenGLRenderSystem::RenderIndexedGeometry( Viewer::RenderMode, Viewer::Mesh*) + 41
    17 Kubus.Frontend 0x0000000101609e9f Viewer::OpenGLRenderSystem::Render(Viewer::CameraC ontroller const*, std::__1::vector<Viewer::Light*, std::__1::allocator<Viewer::Light*> > const&, Viewer::ClippingPlane const**, float, Viewer::Entity*, Viewer::Mesh*, Viewer::Material*) + 183
    18 Kubus.Frontend 0x0000000101609d65 Viewer::OpenGLRenderSystem::Render(Viewer::CameraC ontroller const*, std::__1::vector<Viewer::Light*, std::__1::allocator<Viewer::Light*> > const&, Viewer::ClippingPlane const**, float, Viewer::RenderQueue*) + 271
    19 Kubus.Frontend 0x00000001015ba83a Viewer::IfcViewer:raw() + 214
    20 Kubus.Frontend 0x00000001015b839f -[ModelView drawRect:] + 182
    21 com.apple.AppKit 0x00007fff83c5db19 -[NSView _drawRect:clip:] + 4238
    22 com.apple.AppKit 0x00007fff83c5c17a -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1875
    23 com.apple.AppKit 0x00007fff83c5a016 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVis ibleRect:rectIsVisibleRectForView:topView:] + 913
    24 com.apple.AppKit 0x00007fff83c5b420 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVis ibleRect:rectIsVisibleRectForView:topView:] + 6043
    25 com.apple.AppKit 0x00007fff83c5b420 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVis ibleRect:rectIsVisibleRectForView:topView:] + 6043
    26 com.apple.AppKit 0x00007fff83c5b420 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVis ibleRect:rectIsVisibleRectForView:topView:] + 6043
    27 com.apple.AppKit 0x00007fff83c59773 -[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVis ibleRect:rectIsVisibleRectForView:topView:] + 333
    28 com.apple.AppKit 0x00007fff83c562cb -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVi sibleRectForView:] + 2761
    29 com.apple.AppKit 0x00007fff83c34e2d -[NSView displayIfNeeded] + 1876
    30 com.apple.AppKit 0x00007fff83c521c5 -[NSWindow displayIfNeeded] + 232
    31 com.apple.AppKit 0x00007fff83c8f322 _handleWindowNeedsDisplayOrLayoutOrUpdateConstrain ts + 936
    32 com.apple.AppKit 0x00007fff842580e1 __83-[NSWindow _postWindowNeedsDisplayOrLayoutOrUpdateConstraints UnlessPostingDisabled]_block_invoke1531 + 46
    33 com.apple.CoreFoundation 0x00007fff85e4eda7 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK _FUNCTION__ + 23
    34 com.apple.CoreFoundation 0x00007fff85e4ed00 __CFRunLoopDoObservers + 368
    35 com.apple.CoreFoundation 0x00007fff85e40e08 __CFRunLoopRun + 872
    36 com.apple.CoreFoundation 0x00007fff85e40858 CFRunLoopRunSpecific + 296
    37 com.apple.HIToolbox 0x00007fff87d87aef RunCurrentEventLoopInMode + 235
    38 com.apple.HIToolbox 0x00007fff87d8786a ReceiveNextEventCommon + 431
    39 com.apple.HIToolbox 0x00007fff87d876ab _BlockUntilNextEventMatchingListInModeWithFilter + 71
    40 com.apple.AppKit 0x00007fff83b2ff81 _DPSNextEvent + 964
    41 com.apple.AppKit 0x00007fff83b2f730 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 194
    42 com.apple.AppKit 0x00007fff83b23593 -[NSApplication run] + 594
    43 com.apple.AppKit 0x00007fff83b0ea14 NSApplicationMain + 1832
    44 libdyld.dylib 0x00007fff8b9015c9 start + 1

    Greets,

    Floris

  2. #2
    Senior Member OpenGL Guru Dark Photon's Avatar
    Join Date
    Oct 2004
    Location
    Druidia
    Posts
    4,475
    Quote Originally Posted by CainitePrince View Post
    We are doing some internal testing and we have several machines where an EXC_BAD_ACCESS occurs inside the GeForce GL Driver. ...
    Does anybody know more about this? Am I doing something wrong while rendering or is this a driver bug? ...

    Exception Type: EXC_BAD_ACCESS (SIGSEGV)
    Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000008
    ...

    15 GLEngine 0x00007fff9055bd9e glDrawElementsBaseVertex_GL3Exec + 208
    16 Kubus.Frontend 0x0000000101609ba1 Viewer::OpenGLRenderSystem::RenderIndexedGeometry( Viewer::RenderMode, Viewer::Mesh*) + 41
    17 Kubus.Frontend 0x0000000101609e9f Viewer::OpenGLRenderSystem::Render(Viewer::CameraC ontroller const*, std::__1::vector<Viewer::Light*, std::__1::allocator<Viewer::Light*> > const&, Viewer::ClippingPlane const**, float, Viewer::Entity*, Viewer::Mesh*, Viewer::Material*) + 183
    ...
    I would dump/inspect the GL batch state at your glDrawElementsBaseVertex() call. If it is your bug, I suspect you are passing a buffer offset (8) in for one of the vertex attribute arrays or index lists, but there was no buffer object bound to the appropriate buffer object bind point (e.g. ARRAY or ELEMENT_ARRAY).

    Another possibility is that you have a rogue vertex attribute array you left enabled but which you thought was disabled, and the driver is reading from it potentially causing a crash.

  3. #3
    Junior Member Newbie
    Join Date
    Mar 2015
    Posts
    11
    Thanks for your response. I will see if I can inspect the OpenGL state when I have access to the hardware again.

    It's certainly possible I'm using vertex attribute arrays in a wrong way. I thought that part was very confusing. This is currently how I'm using them. I'm calling SetVertexBuffer/SetIndexBuffer once to set up the VAO. After that I only bind and unbind the VAO. Do I need to call glDisableVertexAttribArray somewhere?

    //! Holds geometry information.
    struct Vertex
    {
    float position[3];
    float normal[3];
    };

    OpenGLMesh::OpenGLMesh() : Mesh()
    {
    VERIFY(glGenVertexArrays(1, &_vao));
    }

    OpenGLMesh::~OpenGLMesh()
    {
    VERIFY(glDeleteVertexArrays(1, &_vao));
    }

    void OpenGLMesh::SetVertexBuffer(std::shared_ptr<Vertex Buffer> vertexBuffer)
    {
    VERIFY(glBindVertexArray(_vao));

    vertexBuffer->UseBuffer();
    Mesh::SetVertexBuffer(vertexBuffer);

    //specifies what the data in the buffer is.
    VERIFY(glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*) 0));

    VERIFY(glVertexAttribPointer(1,
    3,
    GL_FLOAT,
    GL_FALSE,
    sizeof(Vertex),
    (void*) (3 * sizeof(float))));

    //signal to OpenGL to feed the vertex data to the shader automatically.
    VERIFY(glEnableVertexAttribArray(0));
    VERIFY(glEnableVertexAttribArray(1));

    VERIFY(glBindVertexArray(0));
    }

    std::shared_ptr<VertexBuffer> OpenGLMesh::GetVertexBuffer()
    {
    return Mesh::GetVertexBuffer();
    }

    void OpenGLMesh::SetIndexBuffer(std::shared_ptr<IndexBu ffer> indexBuffer)
    {
    VERIFY(glBindVertexArray(_vao));

    indexBuffer->UseBuffer();
    Mesh::SetIndexBuffer(indexBuffer);

    //specifies what the data in the buffer is.
    //glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
    VERIFY(glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*) 0));
    VERIFY(glVertexAttribPointer(1,
    3,
    GL_FLOAT,
    GL_FALSE,
    sizeof(Vertex),
    (void*) (3 * sizeof(float))));

    //signal to OpenGL to feed the vertex data to the shader automatically.
    VERIFY(glEnableVertexAttribArray(0));
    VERIFY(glEnableVertexAttribArray(1));

    VERIFY(glBindVertexArray(0));
    }

    std::shared_ptr<IndexBuffer> OpenGLMesh::GetIndexBuffer()
    {
    return Mesh::GetIndexBuffer();
    }

    void OpenGLMesh::BindMesh()
    {
    VERIFY(glBindVertexArray(_vao));
    }

    void OpenGLMesh::UnbindMesh()
    {
    VERIFY(glBindVertexArray(0));
    }
    Last edited by CainitePrince; 04-16-2015 at 07:00 AM.

  4. #4
    Advanced Member Frequent Contributor arekkusu's Avatar
    Join Date
    Nov 2003
    Posts
    886
    Quote Originally Posted by CainitePrince View Post
    It's certainly possible I'm using vertex attribute arrays in a wrong way.
    See previous posts about setting up Apple's OpenGL Profiler. Use the "break on VAO error" checkbox to detect if your draw calls read outside the bound buffers.

    (You can also do this introspection yourself, wrapping draw calls with your own debug macros.)

  5. #5
    Junior Member Newbie
    Join Date
    Mar 2015
    Posts
    11
    Quote Originally Posted by arekkusu View Post
    See previous posts about setting up Apple's OpenGL Profiler. Use the "break on VAO error" checkbox to detect if your draw calls read outside the bound buffers.

    (You can also do this introspection yourself, wrapping draw calls with your own debug macros.)
    I've used both OpenGL Profiler and gDebugger and checked all the break on OpenGL/VAO error boxes I could find. I tested this on Windows and OS X with an Intel chipset, and on OS X on a machine that has the problem. On the Intel machine it doesn't break at all. On the Nvidia machine it crashes but I hit no breakpoints.

  6. #6
    Junior Member Newbie
    Join Date
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    Interestingly, with OpenGL Profiler attached it seems to crash in a different place.

    Crashed Thread: 0 Dispatch queue: com.apple.main-thread

    Exception Type: EXC_BAD_ACCESS (SIGSEGV)
    Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000008

    VM Regions Near 0x8:
    -->
    __TEXT 00000001092d9000-0000000109b38000 [ 8572K] r-x/rwx SM=COW /Users/USER/Documents/*/Frontend.app/Contents/MacOS/Frontend

    Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
    0 com.apple.GeForceGLDriver 0x000012344025a36b 0x123440000000 + 2466667
    1 com.apple.GeForceGLDriver 0x000012344023c7d6 0x123440000000 + 2344918
    2 com.apple.GeForceGLDriver 0x0000123440259db8 0x123440000000 + 2465208
    3 com.apple.GeForceGLDriver 0x000012344001b0aa 0x123440000000 + 110762
    4 com.apple.GeForceGLDriver 0x000012344001c160 0x123440000000 + 115040
    5 com.apple.GeForceGLDriver 0x00001234400220eb 0x123440000000 + 139499
    6 com.apple.GeForceGLDriver 0x00001234400227a2 0x123440000000 + 141218
    7 com.apple.GeForceGLDriver 0x000012344032bb20 0x123440000000 + 3324704
    8 com.apple.GeForceGLDriver 0x000012344032c372 0x123440000000 + 3326834
    9 com.apple.GeForceGLDriver 0x000012344032c985 0x123440000000 + 3328389
    10 com.apple.GeForceGLDriver 0x00001234402286e5 0x123440000000 + 2262757
    11 com.apple.GeForceGLDriver 0x000012344032b719 0x123440000000 + 3323673
    12 com.apple.GeForceGLDriver 0x0000123440319dc6 gldUpdateDispatch + 864
    13 GLEngine 0x00007fff91241cba gleDoSelectiveDispatchNoErrorCoreGL3 + 456
    14 GLEngine 0x00007fff912d6cad gliGetInteger + 2453
    15 com.apple.opengl 0x00007fff895d5eac GLCGetParameter + 361
    16 com.apple.GLEngineProfiler 0x00000001115e7129 0x1115e3000 + 16681
    17 com.apple.GLEngineProfiler 0x00000001115e7d6f 0x1115e3000 + 19823
    18 com.apple.GLEngineProfiler 0x00000001117055cb 0x1115e3000 + 1189323
    19 Kubus.Frontend 0x000000010936bc4f Viewer::OpenGLShader::UseShader() + 31 (OpenGLShader.cpp:134)
    20 Kubus.Frontend 0x00000001094a6c5d Viewer::OpenGLRenderSystem::Render(Viewer::CameraC ontroller const*, std::__1::vector<Viewer::Light*, std::__1::allocator<Viewer::Light*> > const&, Viewer::ClippingPlane const**, float, Viewer::Entity*, Viewer::Mesh*, Viewer::Material*) + 125 (OpenGLRenderSystem.cpp:291)
    21 Kubus.Frontend 0x00000001094a6ad2 Viewer::OpenGLRenderSystem::Render(Viewer::CameraC ontroller const*, std::__1::vector<Viewer::Light*, std::__1::allocator<Viewer::Light*> > const&, Viewer::ClippingPlane const**, float, Viewer::RenderQueue*) + 418 (OpenGLRenderSystem.cpp:265)
    22 Kubus.Frontend 0x0000000109371a0e Viewer::IfcViewer:raw() + 414 (Viewer.cpp:447)
    23 Kubus.Frontend 0x000000010936961a -[ModelView drawRect:] + 282 (ModelView.mm:203)
    24 com.apple.AppKit 0x00007fff8d756b19 -[NSView _drawRect:clip:] + 4238
    25 com.apple.AppKit 0x00007fff8d75517a -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1875
    26 com.apple.AppKit 0x00007fff8d753016 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVis ibleRect:rectIsVisibleRectForView:topView:] + 913
    27 com.apple.AppKit 0x00007fff8d754420 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVis ibleRect:rectIsVisibleRectForView:topView:] + 6043
    28 com.apple.AppKit 0x00007fff8d754420 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVis ibleRect:rectIsVisibleRectForView:topView:] + 6043
    29 com.apple.AppKit 0x00007fff8d754420 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVis ibleRect:rectIsVisibleRectForView:topView:] + 6043
    30 com.apple.AppKit 0x00007fff8d752773 -[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVis ibleRect:rectIsVisibleRectForView:topView:] + 333
    31 com.apple.AppKit 0x00007fff8d74f2cb -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVi sibleRectForView:] + 2761
    32 com.apple.AppKit 0x00007fff8d72de2d -[NSView displayIfNeeded] + 1876
    33 com.apple.AppKit 0x00007fff8d74b1c5 -[NSWindow displayIfNeeded] + 232
    34 com.apple.AppKit 0x00007fff8d788322 _handleWindowNeedsDisplayOrLayoutOrUpdateConstrain ts + 936
    35 com.apple.AppKit 0x00007fff8dd510e1 __83-[NSWindow _postWindowNeedsDisplayOrLayoutOrUpdateConstraints UnlessPostingDisabled]_block_invoke1531 + 46
    36 com.apple.CoreFoundation 0x00007fff849e6da7 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK _FUNCTION__ + 23
    37 com.apple.CoreFoundation 0x00007fff849e6d00 __CFRunLoopDoObservers + 368
    38 com.apple.CoreFoundation 0x00007fff849d8e08 __CFRunLoopRun + 872
    39 com.apple.CoreFoundation 0x00007fff849d8858 CFRunLoopRunSpecific + 296
    40 com.apple.HIToolbox 0x00007fff87b6daef RunCurrentEventLoopInMode + 235
    41 com.apple.HIToolbox 0x00007fff87b6d86a ReceiveNextEventCommon + 431
    42 com.apple.HIToolbox 0x00007fff87b6d6ab _BlockUntilNextEventMatchingListInModeWithFilter + 71
    43 com.apple.AppKit 0x00007fff8d628f81 _DPSNextEvent + 964
    44 com.apple.AppKit 0x00007fff8d628730 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 194
    45 com.apple.AppKit 0x00007fff8d61c593 -[NSApplication run] + 594
    46 com.apple.AppKit 0x00007fff8d607a14 NSApplicationMain + 1832
    47 Kubus.Frontend 0x00000001092fdd42 main + 34 (main.m:13)
    48 libdyld.dylib 0x00007fff8b12b5c9 start + 1

  7. #7
    Junior Member Newbie
    Join Date
    Mar 2015
    Posts
    11
    Quote Originally Posted by Dark Photon View Post
    I would dump/inspect the GL batch state at your glDrawElementsBaseVertex() call. If it is your bug, I suspect you are passing a buffer offset (8) in for one of the vertex attribute arrays or index lists, but there was no buffer object bound to the appropriate buffer object bind point (e.g. ARRAY or ELEMENT_ARRAY).

    Another possibility is that you have a rogue vertex attribute array you left enabled but which you thought was disabled, and the driver is reading from it potentially causing a crash.
    I have used OpenGL Profiler and can't find anything wrong with arrays, elements arrays or vertex attribute arrays. Here's the relevant state I saved from OpenGL Profiler. There are both an array and an element array bound and two vertex attributes are active.

    Arrays <nil>
    GL_VERTEX_ARRAY_BINDING 15
    Generic Vertex Attributes <nil>
    0 <nil>
    GL_VERTEX_ATTRIB_ARRAY_ENABLED GL_TRUE
    GL_VERTEX_ATTRIB_ARRAY_SIZE 3
    GL_VERTEX_ATTRIB_ARRAY_STRIDE 24
    GL_VERTEX_ATTRIB_ARRAY_TYPE GL_FLOAT
    GL_VERTEX_ATTRIB_ARRAY_NORMALIZED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_POINTER 0x00000000
    GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 28
    GL_VERTEX_ATTRIB_ARRAY_INTEGER GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0
    1 <nil>
    GL_VERTEX_ATTRIB_ARRAY_ENABLED GL_TRUE
    GL_VERTEX_ATTRIB_ARRAY_SIZE 3
    GL_VERTEX_ATTRIB_ARRAY_STRIDE 24
    GL_VERTEX_ATTRIB_ARRAY_TYPE GL_FLOAT
    GL_VERTEX_ATTRIB_ARRAY_NORMALIZED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_POINTER 0x0000000c
    GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 28
    GL_VERTEX_ATTRIB_ARRAY_INTEGER GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0
    2 <nil>
    GL_VERTEX_ATTRIB_ARRAY_ENABLED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_SIZE 4
    GL_VERTEX_ATTRIB_ARRAY_STRIDE 0
    GL_VERTEX_ATTRIB_ARRAY_TYPE GL_FLOAT
    GL_VERTEX_ATTRIB_ARRAY_NORMALIZED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_POINTER 0x00000000
    GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0
    GL_VERTEX_ATTRIB_ARRAY_INTEGER GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0
    3 <nil>
    GL_VERTEX_ATTRIB_ARRAY_ENABLED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_SIZE 4
    GL_VERTEX_ATTRIB_ARRAY_STRIDE 0
    GL_VERTEX_ATTRIB_ARRAY_TYPE GL_FLOAT
    GL_VERTEX_ATTRIB_ARRAY_NORMALIZED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_POINTER 0x00000000
    GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0
    GL_VERTEX_ATTRIB_ARRAY_INTEGER GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0
    4 <nil>
    GL_VERTEX_ATTRIB_ARRAY_ENABLED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_SIZE 4
    GL_VERTEX_ATTRIB_ARRAY_STRIDE 0
    GL_VERTEX_ATTRIB_ARRAY_TYPE GL_FLOAT
    GL_VERTEX_ATTRIB_ARRAY_NORMALIZED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_POINTER 0x00000000
    GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0
    GL_VERTEX_ATTRIB_ARRAY_INTEGER GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0
    5 <nil>
    GL_VERTEX_ATTRIB_ARRAY_ENABLED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_SIZE 4
    GL_VERTEX_ATTRIB_ARRAY_STRIDE 0
    GL_VERTEX_ATTRIB_ARRAY_TYPE GL_FLOAT
    GL_VERTEX_ATTRIB_ARRAY_NORMALIZED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_POINTER 0x00000000
    GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0
    GL_VERTEX_ATTRIB_ARRAY_INTEGER GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0
    6 <nil>
    GL_VERTEX_ATTRIB_ARRAY_ENABLED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_SIZE 4
    GL_VERTEX_ATTRIB_ARRAY_STRIDE 0
    GL_VERTEX_ATTRIB_ARRAY_TYPE GL_FLOAT
    GL_VERTEX_ATTRIB_ARRAY_NORMALIZED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_POINTER 0x00000000
    GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0
    GL_VERTEX_ATTRIB_ARRAY_INTEGER GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0
    7 <nil>
    GL_VERTEX_ATTRIB_ARRAY_ENABLED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_SIZE 4
    GL_VERTEX_ATTRIB_ARRAY_STRIDE 0
    GL_VERTEX_ATTRIB_ARRAY_TYPE GL_FLOAT
    GL_VERTEX_ATTRIB_ARRAY_NORMALIZED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_POINTER 0x00000000
    GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0
    GL_VERTEX_ATTRIB_ARRAY_INTEGER GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0
    8 <nil>
    GL_VERTEX_ATTRIB_ARRAY_ENABLED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_SIZE 4
    GL_VERTEX_ATTRIB_ARRAY_STRIDE 0
    GL_VERTEX_ATTRIB_ARRAY_TYPE GL_FLOAT
    GL_VERTEX_ATTRIB_ARRAY_NORMALIZED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_POINTER 0x00000000
    GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0
    GL_VERTEX_ATTRIB_ARRAY_INTEGER GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0
    9 <nil>
    GL_VERTEX_ATTRIB_ARRAY_ENABLED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_SIZE 4
    GL_VERTEX_ATTRIB_ARRAY_STRIDE 0
    GL_VERTEX_ATTRIB_ARRAY_TYPE GL_FLOAT
    GL_VERTEX_ATTRIB_ARRAY_NORMALIZED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_POINTER 0x00000000
    GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0
    GL_VERTEX_ATTRIB_ARRAY_INTEGER GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0
    10 <nil>
    GL_VERTEX_ATTRIB_ARRAY_ENABLED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_SIZE 4
    GL_VERTEX_ATTRIB_ARRAY_STRIDE 0
    GL_VERTEX_ATTRIB_ARRAY_TYPE GL_FLOAT
    GL_VERTEX_ATTRIB_ARRAY_NORMALIZED GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_POINTER 0x00000000
    GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0
    GL_VERTEX_ATTRIB_ARRAY_INTEGER GL_FALSE
    GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB 0
    11 <nil>
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