llvm-project

dfefc037 - [lit] Explicitly unset timer to free thread stack (#188717)

[lit] Explicitly unset timer to free thread stack (#188717) Currently the virtual address space usage of lit fluctuates wildly, with peak usage exceeding 4GB, which results in subsequent thread spawning errors on 32-bit systems. The cause of this is a circular reference in TimeoutHelper._timer (via the callback), which causes the 8MB thread stack to not be immediately reclaimed when the timer is cancelled. We can avoid this by explicitly unsetting the timer.