Date: Sat, 3 Jul 1999 10:06:23 -0400 (EDT) From: Thomas David Rivers <rivers@dignus.com> To: brdean@unx.sas.com, freebsd-hackers@FreeBSD.ORG Subject: Re: support for i386 hardware debug watch points Message-ID: <199907031406.KAA55948@lakes.dignus.com> In-Reply-To: <199907031343.JAA13822@dean.pc.sas.com>
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> > Hi, > > After recently debugging a very elusive memory overwrite problem that > I was only able to find by setting up a debugger watch point, and > suffering through the slowness that this introduced, I began reading > up on the ix86 support for hardware watch points. Using this facility > of the chip would require OS support, and specifically, loading the > debug registers at context switch time. Also, the 'ptrace' system > call could easily be extended to provide an interface for doing this > from user code. > > Is there any interest in supporting something like this in FreeBSD? > I'm volunteering to spend some cycles on this, but I don't want to go > to the effort if there's little chance that the work would be > integrated. > > Thanks, > -Brian > -- > Brian Dean SAS Institute Inc brdean@unx.sas.com > Brian - Scan through the mail archives - I brought this up about this time last year, I think... There were several responses - some people may be willing to assist... - Dave Rivers - To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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