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Patching with threading?

high6
high6
in Programming and Coding

Featured Replies

Posted

If I patch code that a thread could be executing, should I pause the thread first? Or is it safe as long as I use "REP MOVS DWORD PTR ES:[EDI],DWORD PTR DS:[ESI]"? I know using a forloop would definitely cause problems.

I think you should pause first. Not sure what happens when you pause, patch and resume the thread while it's executing that code.

Agree to K, and I'm not sure about the second part - though I remember something about the CPU caching the instruction currently being executed (that theory is supported by the existence of a FlushInstructionCache API).

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