I found the issue in the yocto based distribution: elfutils / libdw was compiled without xz support, and was thus unable to extract the minidebuginfo symbol names. On Ubuntu / Fedora, I don't know exactly what the issue is.
Etienne On Tue, Nov 21, 2023 at 11:53 PM Etienne Cordonnier <ecordonn...@snap.com> wrote: > Thanks for your reply. I have tested with Fedora 39 and indeed coredumpctl > info shows function names when a binary provided by a Fedora package > crashes. However, when I compile a test binary on Fedora, even with debug > symbols enabled (I tried -g and -ggdb), and I then send kill -SEGV my > binary, coredumpctl info shows "n/a" instead of the function names of my > test binary. I also tried to inject minidebuginfo into my binary file with > the same result. > > Do you know what I should do so that coredumpctl info also works with > binary files I compile? (I added full reproduction steps including the code > of this test binary to > https://unix.stackexchange.com/questions/761966/how-to-get-symbolized-call-stacks-with-coredumpctl-info > ). > > Etienne > > On Fri, Nov 17, 2023 at 10:03 AM Lennart Poettering < > lenn...@poettering.net> wrote: > >> On Do, 16.11.23 18:37, Etienne Cordonnier (ecordonn...@snap.com) wrote: >> >> > Hello, >> > I am testing a yocto based system, where it seems that "coredumpctl >> info" >> > isn't able to use minidebuginfo / gnu_debugdata to extract a symbolized >> > call-stack. I saw in the code that coredumpctl uses elfutils / libdwfl >> in >> > order to extract a call-stack, and as far as I understand libdwfl >> supports >> > minidebuginfo since this commit ( >> > >> https://urldefense.proofpoint.com/v2/url?u=https-3A__sourceware.org_git_-3Fp-3Delfutils.git-3Ba-3Dcommit-3Bh-3D5083a70d3b64946fa47ea5766943a15a3ecc6891&d=DwIBAg&c=ncDTmphkJTvjIDPh0hpF_4vCHvabgGkICC2epckfdiw&r=AhkbNonVuMIGRfPx_Qj9TsRih1DULJTKUkSGa66m67E&m=HRBTXvbd-s9li256Vbbs9zIn33TULJrpWyLD4WV4rEtaedXG1zYgtpXt1vN3eolJ&s=WjU-C5bJAjCxwlzGD-CwjTBUFN_ZEr7Z1pFNC54_HU0&e= >> > ). >> > >> > Is there a configuration / build-option / etc. to enable support for >> > minidebuginfo in coredumpctl? If no is it on the roadmap? The advantage >> of >> > minidebuginfo is that it is much smaller than full debug symbols. >> >> Fedora has been using minidebuginfo since ~10y or so, and >> coredumctl/libdwfl has been working fine with it. So it certainly >> works, it's how this all works on my local machine since forever. >> >> Maybe ask your distro for help, it's generally an integration issue of >> distributions i this doesn't work. >> >> Lennart >> >> -- >> Lennart Poettering, Berlin >> >
