The Old New Thing

Using the "gu" debugger command to find the infinite loop

April 26, 2007 Apr 26, 2007 04/26/07

Raymond Chen

Somebody says, "Your program is consuming 100% CPU" and hands you a debug session. Usually, this happens because one thread has gotten stuck in an infinite loop. And if you're lucky it's the type of infinite loop that's easy to diagnose because it's just one function that isn't returning. (The more complicated types are where a function does ...