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feat(vulkan): re-enable GPU-Assisted Validation

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The GPU-AV enable list was removed to dodge a crash in SDK 1.4.341,
whose GPU-AV null-deref'd on descriptor_heap pipelines
(VK_PIPELINE_CREATE_2_DESCRIPTOR_HEAP_BIT_EXT, layout = VK_NULL_HANDLE)
in PipelineSubState::GetPipelineLayoutUnion:
  https://github.com/KhronosGroup/Vulkan-ValidationLayers/issues/12103

That was fixed in the next SDK release. The validation layer is now
1.4.350 (> 1.4.341), so restore VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_EXT
in the VkValidationFeaturesEXT enable list.

Verified by running the HelloUI example (which draws through the
descriptor_heap compute pipelines) with the layer active: it renders the
full UI for the entire run with GPU-AV reporting "Both GPU Assisted
Validation and Normal Core Check Validation are enabled" and no
descriptor-heap null-deref or VUID errors.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
catbot 2026-06-03 02:10:23 +00:00
commit e7469133e8
1 changed files with 14 additions and 20 deletions
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34
implementations/Crafter.Graphics-Device.cpp
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@ -432,30 +432,24 @@ void Device::Initialize() {
app.pEngineName = "Crafter.Graphics";
app.apiVersion = VK_MAKE_VERSION(1, 4, 0);
// TODO(re-enable GPU-AV): once Vulkan SDK > 1.4.341 is the floor.
// GPU-Assisted Validation: shader-execution-time instrumentation that
// catches out-of-bounds descriptor / buffer access the standard layer
// can't see. Opt-in via the enable list below.
//
// GPU-Assisted Validation is opt-in via the enable list — leaving it
// out disables it. SDK 1.4.341's GPU-AV does not handle
// descriptor_heap pipelines (VK_PIPELINE_CREATE_2_DESCRIPTOR_HEAP_BIT_EXT
// with layout = VK_NULL_HANDLE): `PipelineSubState::GetPipelineLayoutUnion`
// null-derefs on the first dispatch/draw against such a pipeline.
//
// Tracked + fixed upstream:
// This was previously disabled to work around a bug in SDK 1.4.341's
// GPU-AV, which null-deref'd on descriptor_heap pipelines
// (VK_PIPELINE_CREATE_2_DESCRIPTOR_HEAP_BIT_EXT with layout =
// VK_NULL_HANDLE) in `PipelineSubState::GetPipelineLayoutUnion`:
// https://github.com/KhronosGroup/Vulkan-ValidationLayers/issues/12103
// Per spencer-lunarg (LunarG): broken in 1.4.341, fixed and landing
// in the next SDK release. Once we bump our Vulkan-Headers / SDK
// dependency past 1.4.341, restore the original enable list:
//
// VkValidationFeatureEnableEXT enables[] = {
// VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_EXT
// };
// validationFeatures.enabledValidationFeatureCount = 1;
// validationFeatures.pEnabledValidationFeatures = enables;
//
// Standard validation (the layer itself) is still on; only the GPU-AV
// out-of-bounds / shader-instrumentation checks are temporarily off.
// Per spencer-lunarg (LunarG) that was fixed in the next SDK release.
// The validation layer is now 1.4.350 (> 1.4.341), so re-enable it.
VkValidationFeatureEnableEXT enabledValidationFeatures[] = {
VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_EXT,
};
VkValidationFeaturesEXT validationFeatures = {
.sType = VK_STRUCTURE_TYPE_VALIDATION_FEATURES_EXT,
.enabledValidationFeatureCount = sizeof(enabledValidationFeatures) / sizeof(enabledValidationFeatures[0]),
.pEnabledValidationFeatures = enabledValidationFeatures,
};
VkInstanceCreateInfo instanceCreateInfo = {};