One of my favorite feature I miss in linux is the core dump. When a program crashes, the os takes a snapshot of its memory image of the crashed program and put into a file usually named 'core'. The core file is extremely usefully for debugging purpose, since it contains the state when the program crashes, such as the stack trace.
After switching to windows, I was always wanting to find same feature. Until recently, I ran across an article in msdn, "Collecting User-Mode Dumps". On windows vista and after, you can create such dump file by modifying system registers.
Bingo!
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