#systemtap on 2017-03-29 — 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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13:37 <sona> i didn't understand the output of sprint_ubacktrace : 0x7f1808e9996e : dict_ref+0xc/0xd6 [/usr/local/lib/libglusterfs.so.0.0.1]

13:37 <sona> 0x7f1808e9866b : dict_new+0x31/0x37 [/usr/local/lib/libglusterfs.so.0.0.1]

13:37 <sona> 0x7f17fa5d42dd : 0x7f17fa5d42dd [...r/local/lib/glusterfs/3.10dev/xlator/performance/md-cache.so+0x102dd/0x219000]

13:38 <sona> here in the last line , after md-cache.so, is this the line no. pf the function or something else ?

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14:22 <fche> that ix a hex offset and a total size

14:23 <fche> so we know where into that shared library that dict_new function would return to, but we lack unwind/symbol info, so can't decode further

14:23 <fche> alas, sona is gona :(

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18:55 <sonal> is there any way to convert string into array in systemtap

18:58 <fche> maybe see [man function::tokenize]

18:59 <fche> it's an iteration method

19:03 <sonal> fche, oky

19:04 <fche> you (?) were asking about the sprint_ubacktrace messages earlier?

19:09 <sonal> ya

19:13 <sonal> fche, can you give me some idea on how to trim a string

19:13 <sonal> for instance string is : dict_unref+0xc [libglusterfs.so.0.0.1]

19:13 <sonal> call_resume+0xee [libglusterfs.so.0.0.1]

19:13 <sonal> call_stub_destroy+0x83 [libglusterfs.so.0.0.1]

19:13 <sonal> call_stub_wipe_args+0x1c [libglusterfs.so.0.0.1]

19:13 <sonal> args_wipe+0xe5 [libglusterfs.so.0.0.1]

19:13 <sonal> 0x7f5f109f9fd2 [io-threads.so+0x4fd2]

19:13 <fche> our string processing functions aren't that powerful unfortunately

19:13 <sonal> ya, i was searching from long string functions

19:14 <sonal> so i need from the last line : 0x7f5f109f9fd2 and io-threads.so

19:15 <sonal> can we do it this way, converting string into array and then going on every index, just like we do in C

19:21 <fche> see [man tapset::string]

19:21 <fche> we do need much more though

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19:26 <sonal> fche, yep

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20:15 <irker346> systemtap: dsmith systemtap.git:refs/heads/master * release-3.1-32-ge124c0c / testsuite/systemtap.pass1-4/semok.exp: No longer kfail semok/autocast14.stp. http://tinyurl.com/lfqesat

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