Em Thu, Jan 17, 2019 at 10:25:24AM +0000, Nick Clifton escreveu: > Hi Arnaldo, > > >>> Humm, is -fno-omit-frame-pointer there by any chance? :-) > > > Would be interestint to have that info, as we could hint the user that > > backtraces should be done with something else than '--call-graph fp' :-) > > OK, well I have added the feature to annobin 8.67, now in Fedora > rawhide. Unfortunately it will take a while before the information > actually gets into binaries, since the new data is only recorded > when a package is rebuilt. So basically you are looking at Fedora 30 > at the earliest.
That is not a problem, I have containers for rawhide, so I can just go ahead and do a podman pull + build, build some binary, and then add the feature, the warning will get into effect when that note is found and userspace callchains are used without DWARF info for such binaries. > If you want to see the plugin in action, build something on a rawhide > system (or a mock chroot) using the gcc command line option -fplugin=annobin. Right, that is what I'll do as soon as I get the time. > (Make sure that you have annobin-8.67 installed). Then once the binary > is built run "readelf --wide --notes <file> | grep omit" to see the > omit-frame-pointer notes. Thanks for the hints, I'll get you CCed when I get to work on this. - Arnaldo
