[Windows & DMD] No callstack when crash with Access violation reading location 0x00000000

[Xavier Bigand]

Le 13/01/2014 20:42, Xavier Bigand a écrit :
> Le 12/01/2014 18:01, Benjamin Thaut a écrit :
>> Am 12.01.2014 17:18, schrieb Xavier Bigand:
>>> Le 12/01/2014 11:16, Benjamin Thaut a écrit :
>>>> Am 12.01.2014 00:47, schrieb Xavier Bigand:
>>>>> I didn't know this menu settings, but activate Access Violation don't
>>>>> change anything.
>>>>>
>>>>
>>>> It seems that your crash happens inside the OpenGL part of the graphics
>>>> driver. It is caused by
>>>> DQuick\src\dquick\renderer3D\openGL\mesh.d line 125
>>>> I assume that you setup a few OpenGL parameters invalid and thus the
>>>> driver reads from a null pointer.
>>>>
>>>> I found it by single stepping. I started the application, then set the
>>>> breakpoint like shown below and single steppt into the draw() method.
>>>>
>>>> debug
>>>> {
>>>>      if (mRebuildDebugMeshes)
>>>>          updateDebugMesh(); // put breakpoint here
>>>>      mDebugMesh.draw();
>>>>      if ((implicitWidth != float.nan && implicitHeight != float.nan)
>>>>          && (implicitWidth != mSize.x && implicitHeight != mSize.y))
>>>>          mDebugImplicitMesh.draw();
>>>> }
>>>>
>>>> Have fun debugging ;-)
>>>>
>>>> Kind Regards
>>>> Benjamin Thaut
>>>
>>> Thank for your support and your time
>>>
>>> I already tried to debug opengl with gdebugger is used to find those
>>> kind of issues. But it doesn't seems working fine with D binaries.
>>
>> I higly recommend using either glIntercept
>> (http://code.google.com/p/glintercept/) or glslDevil
>> (http://www.vis.uni-stuttgart.de/glsldevil/) to debug OpenGL
>> applications.
>> If you have a nvidia card you could also use nvidia nsight to debug your
>> application:
>> https://developer.nvidia.com/nvidia-nsight-visual-studio-edition
>>
>> My guess would be that either your vertex buffer or index buffer is no
>> longer valid, thus gets not bound, and as a result the graphics driver
>> reads from client memory at address null.
>>
>> Kind Regards
>> Benjamin Thaut
>
> I took a look to buffers manually just before the glDrawElements call,
> and all values seems good. I also check if any glDeleteBuffers and
> glDeleteShader,...  was called before the glDrawElements.
>
> I need find some more time to test with glIntercept or nvidia nsight

I finally tried glIntercept, but I am not sure how I need interpret the 
output :
glViewport(0,0,801,600)
glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT)
glBindBuffer(GL_ARRAY_BUFFER,10)
glBufferData(GL_ARRAY_BUFFER,48,0604C000,GL_DYNAMIC_DRAW)
glBindBuffer(GL_ARRAY_BUFFER,0)
glBindBuffer(GL_ARRAY_BUFFER,11)
glBufferData(GL_ARRAY_BUFFER,64,0604E600,GL_DYNAMIC_DRAW)
glBindBuffer(GL_ARRAY_BUFFER,0)
glBindBuffer(GL_ARRAY_BUFFER,13)
glBufferData(GL_ARRAY_BUFFER,48,0604FFC0,GL_DYNAMIC_DRAW)
glBindBuffer(GL_ARRAY_BUFFER,0)
glBindBuffer(GL_ARRAY_BUFFER,14)
glBufferData(GL_ARRAY_BUFFER,64,0604E580,GL_DYNAMIC_DRAW)
glBindBuffer(GL_ARRAY_BUFFER,0)
glUseProgram(4)
glUniformMatrix4fv(0,1,false,[0.002497,0.000000,0.000000,0.000000,0.000000,-0.003333,0.000000,0.000000,0.000000,0.000000,-0.010000,0.000000,-1.000000,1.000000,0.000000,1.000000])
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,9)
glBindBuffer(GL_ARRAY_BUFFER,10)
glEnableVertexAttribArray(0)
glVertexAttribPointer(0,3,GL_FLOAT,false,12,00000000)
glBindBuffer(GL_ARRAY_BUFFER,11)
glEnableVertexAttribArray(1)
glVertexAttribPointer(1,4,GL_FLOAT,false,16,00000000)
glDrawElements(GL_LINE_LOOP,4,GL_UNSIGNED_INT,00000000) GLSL=4
----->glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT)
----->----->glUseProgram(4)
----->----->glUniformMatrix4fv(0,1,false,[0.002497,0.000000,0.000000,0.000000,0.000000,-0.003333,0.000000,0.000000,0.000000,0.000000,-0.010000,0.000000,-1.000000,1.000000,0.000000,1.000000])
----->glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,9)
----->----->glBindBuffer(GL_ARRAY_BUFFER,10)
----->----->glEnableVertexAttribArray(0)
----->----->glVertexAttribPointer(0,3,GL_FLOAT,false,12,00000000)
----->----->glBindBuffer(GL_ARRAY_BUFFER,11)
----->----->glEnableVertexAttribArray(1)
----->----->glVertexAttribPointer(1,4,GL_FLOAT,false,16,00000000)
----->----->glDrawElements(GL_LINE_LOOP,4,GL_UNSIGNED_INT,00000000) GLSL=4

This extract seems to correspond of latest gl command called just before 
the crash after the window resize. It doesn't seems to have any error here.