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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<Vall> Hello everyone, I'm trying to use systemtap to show programs calling execve syscalls and having a lot of trouble
<Vall> my script is very simple: stap -e 'probe syscall.execve { printf("%d %d %s exec %s\n", pid(), ppid(), execname(), kernel_string($filename)) }'
<Vall> it runs a little (prints 10 or 15 lines depicting execve calls) and then aborts with the following:
<Vall> ERROR: user string copy fault -14 at 00007f661a630cdb near identifier 'user_string_n' at /usr/share/systemtap/tapset/uconversions.stp:120:10
<Vall> Can anyone help? I can't figure what the problem is
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<irker542> systemtap: fche systemtap.git:refs/heads/rth/bpf * release-3.1-107-g5552db3 / loc2stap.cxx loc2stap.h staptree.cxx tapsets.cxx: Fix systemtap.base/pointer_array.stp http://tinyurl.com/ybtz5wgg
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<fche> hi Vall
<fche> [man error::pass5] gives a hint, kernel_string($filename) looks questionable fwiw; tried printing 'filename' or 'argstr' instead of 'kernel_string($filename)' ?
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<Vall> fche: sorry was afk
<fche> it -is- saturday, :)
<fche> we should all be afk
<Vall> what does "[man error::pass5]" mean? some manual page?
<Vall> (sorry if that's a too-stupid question, total newbie here)
<fche> yup, man error::pass5 will get you a stap man page
<Vall> thanks fche, having a look
<Vall> (will disconnect from that computer and reconnect from my other one)
<Vall> (brb)
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<Vall> Back
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<Vall> fche: no manpage here...
<Vall> $ man error::pass5
<Vall> No manual entry for error::pass5
<Vall> :-/
<fche> hm, how old is your copy of stap? which distro ?
<Vall> This is on Linux Mint 17 Qiana, with all systemtap packages installed
<Vall> lemme check systemtap version
<fche> stap -V
<Vall> Systemtap translator/driver (version 2.3/0.158, Debian version 2.3-1ubuntu1.4 (trusty))
<fche> a bit old but we've had man pages back in those days
<fche> mint uses ubuntu debs? TIL
<Vall> lemme check if I'm missing any packages
<Vall> ahhh
<Vall> un systemtap-doc <none> <none> (no description available)
<Vall> installing it now