Hi, On 2025-08-28 10:43, Simon Marchi wrote: > Hello, > > I noticed that Debian's ld-linux.so didn't provide the SystemTap probes > that allow GDB to get notified of shared library changes, and avoid > re-reading the whole list from the debugged process all the time. I saw > this thread here [1], which, if I understand correctly, ended up in > disabling the feature because of build failures. It has been 10 years > since then, many issues have probably been ironed-out, so I was > wondering if you would consider trying to enable the feature again, at > least starting with amd64.
Yes things seems to have stabilized since that moment, at least from a few tests things seems to work better now. > I don't have a pressing need for it. I'm a GDB developer, I noticed > some tests behaving differently on my Debian machine than on my other > non-Debian machine, and it lead me to this observation. But since it > helps GDB be a bit more efficient, I think it would be nice to have it > enabled. Ok, noted. I'll try to re-enable systemtap support in a future version. After discussion, it appears that it will make (cross-)bootstrapping debian way more difficult. For that reason, I have been asked to also add a build profile to be able to disable that feature. > According to Luis Machado, GDB expert for the ARM architecture, it's not > possible to use those probes for ARM, because the probe addresses don't > carry the Thumb bit. So it would have to be a feature enabled only for > certain arches in any case. For AArch64, it should be fine. My plan is to enable it on all linux architectures, even if it is not useful. I will already have to handle conditional on multiple build profile, i don't want to add another layer of complexity. Regards Aurelien -- Aurelien Jarno GPG: 4096R/1DDD8C9B [email protected] http://aurel32.net
