From owner-freebsd-questions  Tue Jun 22  1:28:48 1999
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From: Scott Gasch <scott@mail.medsp.com>
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Subject: IsBadReadPointer
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Date: Tue, 22 Jun 1999 01:27:51 -0700 (PDT)
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Hi there,

In Win32 there are several system calls that can be used to check
whether pointers are vaild or not.  They are called IsBadReadPointer,
IsBadWritePointer, IsBadStringPointer, etc...

I guess they work by checking the permission of the page of memory the
pointers point to.  I find them useful debugging tools and often write
preconditions based on them as it is often better to check a pointer
for readibility than simply checking for NULL.

My question is: does the same thing exist in FreeBSD?

Thanks for your help,
Scott


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