Date: Sun, 23 Nov 2008 18:32:41 -0800 From: "Garrett Cooper" <yanefbsd@gmail.com> To: "FreeBSD Current" <freebsd-current@freebsd.org> Subject: Re: Compiled results don't match for CURRENT and 7.0-RELEASE on amd64 / gdb weirdness with CURRENT Message-ID: <7d6fde3d0811231832o74b4c9b0mc61baa22ea5c6001@mail.gmail.com> In-Reply-To: <7d6fde3d0811231508g351019ffp724e9cc7e1e76c54@mail.gmail.com> References: <7d6fde3d0811231508g351019ffp724e9cc7e1e76c54@mail.gmail.com>
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On Sun, Nov 23, 2008 at 3:08 PM, Garrett Cooper <yanefbsd@gmail.com> wrote: > Hi guys, > > I'm running into a weird bug where the following compiled > results don't match (and this could potentially be a regression). > > System 1: FreeBSD 8-CURRENT, synced up as of 3 days ago. Machine > uses ULE and runs off a dual-core Intel proc. > System 2: FreeBSD 7.0-RELEASE, no patches, SMP enabled. Machine > is a single-proc VMware Fusion image. > > I've made a few changes to hexdump in trying to triage the bugs > under my name, and I noticed a difference in behavior between > 8-CURRENT and 7.0-RELEASE, in particular the fact that 8-CURRENT > doesn't appear to assert a != NULL statement, like on the 7.0-RELEASE > machine, but instead chokes on an earlier statement. The patch can be > found at: <http://pastebin.com/f410b88ca>. OSX does the same thing as > the 7.0-RELEASE machine as well, which is interesting, but there are a > lot of points of variability with that machine, compared to the > CURRENT box and the 7.0-RELEASE VM (compiler version, binutils > versions, libc version, etc), and I don't want to go compare a vanilla > Mac with FreeBSD. > I'm syncing up the 7.0-RELEASE's sources to 7-RELEASE and we'll > see if that fixes anything, but I'd be really curious if anyone else > notes this behavior with different synced versions of CURRENT. The behavior's still the same between 7.0-RELEASE and 7.1-PRERELEASE, so there appears to be an issue with 8-CURRENT. Suggestions for tracking down this issue? -Garrett
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