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