Compiling and running with UBSan reported the following errors:
tests/d3d12.c:31063:5: runtime error: index 4 out of bounds for type 'float [4][8]'
tests/d3d12.c:31063:5: runtime error: index 8 out of bounds for type 'float [8]'
tests/d3d12.c:31063:5: runtime error: load of address 0x557ee85a1500 with insufficient space for an object of type 'const float'
tests/d3d12.c:31248:5: runtime error: index 4 out of bounds for type 'float [4][4]'
tests/d3d12.c:31248:5: runtime error: index 4 out of bounds for type 'float [4]'
tests/d3d12.c:31248:5: runtime error: load of address 0x557ee85a10d0 with insufficient space for an object of type 'const float'
This used to work when the macOS runner had a Sonoma host system.
Now it has Sequoia, even if the guest is still Sonoma, and the
test crashes with:
[mvk-error] VK_TIMEOUT: MTLCommandBuffer "vkQueueSubmit MTLCommandBuffer on Queue 3-0" execution failed (code 2): Caused GPU Hang Error (00000003:kIOGPUCommandBufferCallbackErrorHang)
vkd3d:56072:err:vkd3d_wait_for_gpu_timeline_semaphore Failed to wait for Vulkan timeline semaphore, vr -4.
Upgrading MoltenVK or the guest to Sequoia doesn't seem to help.
I haven't investigated the problem, but my experience is that
the paravirtualized Metal driver has a number of problems.
I'm not specifically interested in that, but since I ran into
those idiosyncrasies while writing other TGSM tests I decided that
it might turn out useful to keep them.
Similar to how we have the "geometry-shader" cap. In principle shader
model 5+ implies support for tessellation shaders, but the Vulkan,
OpenGL, and Metal runners are able to support most of shader model 5+
without the underlying GPU (or API) necessarily supporting tessellation
shaders.
I haven't investigated the problem, but since the tests work for
other implementations and MoltenVK is not always perfect it's likely
that the problem is there.
They use geometry shaders, which MoltenVK doesn't support. However
D3D12 has no way to indicate they're unsupported, so the problem
doesn't surface as a failed draw, but rather as a draw that doesn't
do anything.
