How do wait chains help identify deadlocks in Windows applications?

[ProfRon]

You ever notice your Windows app just hangs there, like it's stuck in traffic? That's often a deadlock messing things up. Threads inside the program grab resources but won't let go, waiting for each other forever. Wait chains pop up as this handy map. They trace exactly who's holding what and waiting on whom. I use them to spot those sneaky loops quick. Picture two buddies, each needing the other's toy to play. Neither moves. Wait chains draw the line connecting them. You follow it around, and bam, you see the circle causing the jam. Tools like those in Task Manager or debuggers spit out these chains. They list the waits step by step. I poke around them when apps freeze on me. Helps me untangle the mess without guessing. You try it next time your program's acting wonky. Just grab the chain and follow the waits. It'll point right to the deadlock culprits. No more blind fixes for you.

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