Systemtap cannot probe user programs in docker

[lifeibiren@gmail.com]

HI,

     I try to probe user program in docker but it doesn't return 
anything at exit. But it works in the host which runs the docker 
container. When I probe kernel in docker, it works fine.

     I google for half a day and got nothing. There are also some other 
guys who meet the same problems and can't resolve it. Can anybody help? 
Thanks.


----------------------------Execution----------------------------------
Run docker by: 'docker run -it --privileged fa57ca962f13 /bin/bash'

$ stap para-callgraph.stp 'process("test2").function("*")' -c ./test2
WARNING: function _start return probe is blacklisted: keyword at 
para-callgraph.stp:24:1
  source: probe $1.return { trace(-1, $$return) }


While in host:
$ stap para-callgraph.stp 'process("test2").function("*")' -c ./test2
WARNING: function _start return probe is blacklisted: keyword at 
para-callgraph.stp:24:1
  source: probe $1.return { trace(-1, $$return) }
          ^
      0 test2(22954):->_start
     15 test2(22954): ->__libc_csu_init
     19 test2(22954):  ->_init
     22 test2(22954):  <-_init
     24 test2(22954):  ->frame_dummy
     28 test2(22954):   ->register_tm_clones
     31 test2(22954):   <-register_tm_clones
     32 test2(22954):  <-frame_dummy
     34 test2(22954): <-__libc_csu_init
     36 test2(22954): ->main
    102 test2(22954):  ->dummy
    105 test2(22954):  <-dummy
    107 test2(22954): <-main
    111 test2(22954): ->__do_global_dtors_aux
    114 test2(22954):  ->deregister_tm_clones
    117 test2(22954):  <-deregister_tm_clones
    119 test2(22954): <-__do_global_dtors_aux
    121 test2(22954): ->_fini
    123 test2(22954): <-_fini

-----------------------------Source-------------------------------
$ cat para-callgraph.stp
#! /usr/bin/env stap
function trace(entry_p, extra) {
   %( $# > 1 %? if (tid() in trace) %)
   printf("%s%s%s %s\n",
          thread_indent (entry_p),
          (entry_p>0?"->":"<-"),
          ppfunc (),
          extra)
}
%( $# > 1 %?
global trace
probe $2.call {
   trace[tid()] = 1
}
probe $2.return {
   delete trace[tid()]
}
%)
probe $1.call   { trace(1, $$parms) }
probe $1.return { trace(-1, $$return) }


---------------------------Enviroment-------------------------
Host OS: Ubuntu 16.04 LTS

$ uname -r
4.4.0-98-generic

$ stap -V
Systemtap translator/driver (version 2.9/0.165, Debian version 
2.9-2ubuntu2 (xenial))
Copyright (C) 2005-2015 Red Hat, Inc. and others
This is free software; see the source for copying conditions.
enabled features: AVAHI LIBSQLITE3 NLS NSS TR1_UNORDERED_MAP

$ docker version
Client:
  Version:      17.09.0-ce
  API version:  1.32
  Go version:   go1.8.3
  Git commit:   afdb6d4
  Built:        Tue Sep 26 22:42:18 2017
  OS/Arch:      linux/amd64

Server:
  Version:      17.09.0-ce
  API version:  1.32 (minimum version 1.12)
  Go version:   go1.8.3
  Git commit:   afdb6d4
  Built:        Tue Sep 26 22:40:56 2017
  OS/Arch:      linux/amd64
  Experimental: false