Re: [Mesa3d-dev] dynamic code generation with gcc

[Allen A. <ak...@po...>]

On Mon, Mar 12, 2001 at 08:39:30PM -0500, Josh Vanderhoof wrote:
|               ... You could mprotect() the page after the DMA buffer
| to PROT_NONE and install a SIGSEGV handler that flushes the buffer if
| the SIGSEGV was on the end of the DMA buffer.  Then you can just let
| Vertex3f segfault when it uses the buffer up.

I haven't used the POSIX signalling system, so please pardon an
uninformed question.  We couldn't afford to install a short-term
signal handler each time Vertex3f is called; it would be cheaper just
to test for overflow.  However, any handler installed long-term by the
driver could interfere with a handler installed by the application. 
Is there a good way to work around that problem?

Allen