Test ICD: vkMapMemory should return a pointer aligned to the strictest alignment mentioned in the spec

[arno-lunarg]

It currently does not do that, leading to unexpected alignment issues when filling shader binding tables in the ray tracing framework

[ziga-lunarg]

Should this be a CTS test?

[spencer-lunarg]

@ziga-lunarg no, this is an issue with our TestICD (the new Mock ICD) ... we have no plans to make a CTS conformance mock ICD and so a CTS test would not help

[spencer-lunarg]

@arno-lunarg what does

aligned to the strictest alignment mentioned in the spec

mean, how would TestICD determine this, another issue is things like shaderGroupBaseAlignment we set in the profile JSON and not the ICD itself

[arno-lunarg]

@arno-lunarg what does

aligned to the strictest alignment mentioned in the spec

mean, how would TestICD determine this, another issue is things like shaderGroupBaseAlignment we set in the profile JSON and not the ICD itself

No way to query that directly, so I would make sure the returned pointer is aligned to 8192, that should be enough

[spencer-lunarg]

what did 8192 come from?

[arno-lunarg]

Totally made up, just go for a somewhat big power of 2!