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Add a defensive guard to ensure heapUsage[0] calculation is always sane

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This commit is contained in:
Stephen Saunders 2023-12-15 21:04:12 -05:00
parent ea3cbbc596
commit ef0ac40cff
1 changed files with 6 additions and 1 deletions
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7
MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
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@ -1655,7 +1655,12 @@ VkResult MVKPhysicalDevice::getMemoryProperties(VkPhysicalDeviceMemoryProperties
budgetProps->heapUsage[1] = (VkDeviceSize)mvkGetUsedMemorySize(); budgetProps->heapUsage[1] = (VkDeviceSize)mvkGetUsedMemorySize();
} }
budgetProps->heapBudget[0] = (VkDeviceSize)getRecommendedMaxWorkingSetSize(); budgetProps->heapBudget[0] = (VkDeviceSize)getRecommendedMaxWorkingSetSize();
budgetProps->heapUsage[0] = (VkDeviceSize)getCurrentAllocatedSize() - budgetProps->heapUsage[1]; uint64_t currentAllocatedSize = (VkDeviceSize)getCurrentAllocatedSize();
if (budgetProps->heapUsage[1] > currentAllocatedSize) {
// mapped memory can't be larger than total memory, so ignore and zero-out
budgetProps->heapUsage[1] = 0;
}
budgetProps->heapUsage[0] = currentAllocatedSize - budgetProps->heapUsage[1];
break; break;
} }
default: default: