vkGetInstanceProcAddr Crash

[viniciusmiguel]

When calling GlfwWindow.Create the MoltenVK function vkGetInstanceProcAddr crashes the runtime.

For context:
dotnet/Silk.NET#1192

The same solution works on windows.
I tried to execute visa Rosetta and native arm64.

crash-report-arm64.txt
crashreport.txt

[viniciusmiguel]

vulkan-dump.txt

Adding log from the Vulkan Configurator in API dump mode.

[billhollings]

Your vulkan-dump.txt log indicates that the validation layers are not happy with the instance parameter of vkGetInstanceProcAddr.

It's not clear from your crashreport.txt and crash-report-arm64.txt reports what function vkGetInstanceProcAddr is retrieving. Is there any way you can debug or trap this to determine which function is being retrieved and what the instance value is?

If vkGetInstanceProcAddr is trying to retrieve itself, and the instance is actually NULL, it's possible that MoltenVK will segfault here. PR #1818 includes a fix for that. Can you test with the latest MoltenVK code and check that please?

[hartmutbehrens]

I'm getting a similar crash when running through chapter 2 of the updated vulkan guide, the section on "Setting up ImGui".

An exception with EXC_BAD_ACCESS, code 2 is raised when trying to call vkGetInstanceProcAddr at this point. The calling code in the application is here.

[hartmutbehrens]

This is on "Apple M1" with Vulkan 1.2.275 driver.

[billhollings]

Have you enabled the VK_KHR_dynamic_rendering extension?

[hartmutbehrens]

I tracked this down to Dear ImGui loading vulkan.h while volk was also in use, resulting in symbol name conflicts.
Basically this issue here: ocornut/imgui#4854
Sorry for the noise.