#systemtap on 2018-03-07 — irc logs at freenode.irclog.whitequark.org

2015-11-12 23:18 fche changed the topic of #systemtap to: http://sourceware.org/systemtap; email systemtap@sourceware.org if answers here not timely, conversations may be logged

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11:27 <lightydo> fche, drsmith: so on my ubuntu vm at first I saw that it did not have System.map (which is in boot) so I added a soft link to it but still did not get the context vars. On the other hand on my fedora 27 vm, I see the context vars...

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11:54 <mjw> lightydo, it has been some time ago I tried ubuntu, maybe this helps? https://wiki.ubuntu.com/Kernel/Systemtap

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12:24 <lightydo> mjw: I have the dbg syms installed. it just doesn;t seem to have the context vars for some kernel functions.

12:24 <mjw> strange, so some do show params, others don't?

12:25 <lightydo> most do, some don't

12:25 <mjw> maybe the debuginfo is not complete/bad for those functions?

12:25 <lightydo> I am looking at the link for systemtap/ubuntu again...

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13:04 <fche> lightydo, ubuntu kernels may be victim to linus's years'old decision to suppress gcc vta - high'quality debuginfo

13:04 <fche> distros should override that

13:05 <fche> see the 'known issues', last entry, in any recent systemtap release notes :(

13:06 <fche> lightydo, you might consider opening a ubuntu kernel distro bug about this

13:16 <mjw> hmmm, not having vta also means not having locviews with gcc8

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14:10 <lightydo> fche, thanks. I guess I'll have to resort to compile the kernel myself and get the dbgsyms

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14:33 <fche> pls do consider filing a formal bug with ubuntu though

14:34 <fche> overriding that silly kernel build setting should be uncontroversial

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14:48 <lightydo> fche, will do....any pointers on filling the bug? never done that before..

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14:49 <fche> https://bugs.launchpad.net/ubuntu/+source/linux/+bugs <-- methinks it starts there

14:49 <fche> 130 New bugs

14:49 <fche> 5612 Open bugs

14:49 <fche> yikes

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15:03 <lightydo> on it

15:03 <fche> thanks

15:04 <lightydo> title suggestions?

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15:04 <lightydo> i.e. summary

15:07 <fche> reenable full variable debugging information within dbgsyms with gcc vta cflags ?

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19:05 <irker848> systemtap: amerey systemtap.git:refs/heads/master * release-3.2-123-g7c83976 / bpf-translate.cxx testsuite/systemtap.bpf/bpf_tests/array_in.stp: BPF translator: add 'in' operator for arrays. http://tinyurl.com/y9j9fjrl

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