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On 2/19/13 1:48 PM, Alan Campin wrote:
I am strongly opposed to the idea of using fixed signatures. It is the
equivalent to turning off level checks on a table. Just playing Russian
Roulette. Eventually you are going to blow out your brains.
Signatures exist for a reason.
Yes, they do. Which is why you need to know exactly what you're doing
when you change a service program's interface, and why, when using fixed
signatures, and you do anything with the sequence of entry points other
than tack new ones onto the end, you need to invalidate any fixed
signatures that denote no-longer-valid entry point sequences.
But the option of using one or more fixed signatures also exists for a
reason. If you add or remove entry points without using fixed
signatures, then anything that uses the service program is going to
break if it's not re-linked to the new version, even if the change
doesn't invalidate the old entry point sequence, and when it throws the
signature violation, you might not be around to pick up the pieces.
Either way, you need to know what you're doing.
--
JHHL
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