The CommandBufferManager has several design and implementation issues that cause or crashes in a of the Vulkan renderer.
Race Conditions in Instant Commands
GetInstantCommandBuffer uses a condition variable to wait for m_instant_semaphore->GetState() == Idle, but lacks proper multi-producer protection. Multiple threads calling it simultaneously could:
- All pass the predicate check before any submission completes.
- Overwrite m_executing_instant_command flag inconsistently.
- Submit overlapping buffers to the same semaphore/fence, corrupting GPU synchronization.
The CommandBufferManager has several design and implementation issues that cause or crashes in a of the Vulkan renderer.
Race Conditions in Instant Commands
GetInstantCommandBuffer uses a condition variable to wait for m_instant_semaphore->GetState() == Idle, but lacks proper multi-producer protection. Multiple threads calling it simultaneously could: