Hi Paul, On Tue, Oct 27, 2020 at 04:20:51PM -0400, Paul Smith wrote: > On Tue, 2020-10-27 at 15:39 +0100, Mark Wielaard wrote: > > The basic idea behind getting buildids into core files is that they > > (the GNU ELF notes) are at the start of the file in the first page > > that is dumped (together with the phdrs) in the core file so when > > core file consumers can walk the program headers and find the buildid > > note (almost immediately following those headers). > > Something is missing; if I check the binary I see a build ID in it. I > can control whether the userspace coredumper or the kernel coredumper > is used via an environment variable: the kernel-generated core contains > a full set of build ID values including vdso.so, the binary, and all > normal .so's. > > But when using the userspace coredumper I get a completely valid > coredump that GDB is happy with, for example, but there is only the > vdso.so build ID present: I don't see any build IDs from the binary or > shared libraries. > > I guess another possibility is that they are there but eu-unstrip > --core can't find them?
Do you have the generated core files somehwere so others can look at them? How exactly are you testing the build-id notes are there? Cheers, Mark
