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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<vbernat>
hey! I am trying to run this script (with -x PID):
<fche>
can you do a stap ... -d /proc/$PID/exe just for giggles?
<fche>
basically to feed it the data it would like
<vbernat>
I am already doing -d /usr/bin/theexecfile
<vbernat>
I am trying with /proc...
<fche>
if you know theexecfile, that should work too -- though something must be wrong since stap ought to have printed that file name instead of 'unknown'
<vbernat>
still the same errors
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<fche>
ok, we should be able to improve on this
<fche>
would you mind filing a bug, with the c program too (or reproduction instructions) ?
<vbernat>
I need to find a reproducer then, program is closed source
<fche>
hm anything with lots of close / read ought to do :) maybe even /usr/bin/find
<fche>
sorry, /me has to step to a meeting awhile
<vbernat>
no problem
<lorddoskias1>
how come the caller_addr can be different than the address printed by print_backtrace, in the string" returning to"
<fche>
from the .return probe, the stacks are a bit messed up by the kernel
<lorddoskias1>
i'm seeing : Caller is: seq_read 0xffffffff811fca71
<lorddoskias1>
Returning to : 0xffffffff81256730 : show_stat+0x90/0x870 [kernel]