ProPolice is a patchset for gcc developed by IBM, which is designed to protect compiled applications from buffer overruns. It is also known as Stack-Smashing Protector (SSP). The OpenBSD project has been using ProPolice since late 2002 and provided the first real-scale test of ProPolice. It has been responsible for finding (which leads to fixing) many bugs within the various programs that ship with the OpenBSD operating system.
ProPolice is now integrated into gcc 4.1; since July of 2006, this is the version of gcc used by the NetBSD project. Patches for FreeBSD are available at http://tataz.chchile.org/ ~tataz/FreeBSD/SSP/README.html.
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