From: "agentzh at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug dyninst/23513] New: Dyninst runtime kills the target process when attaching to the target process for a second time
Date: Sat, 11 Aug 2018 00:34:00 -0000 [thread overview]
Message-ID: <bug-23513-6586@http.sourceware.org/bugzilla/> (raw)
https://sourceware.org/bugzilla/show_bug.cgi?id=23513
Bug ID: 23513
Summary: Dyninst runtime kills the target process when
attaching to the target process for a second time
Product: systemtap
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: dyninst
Assignee: systemtap at sourceware dot org
Reporter: agentzh at gmail dot com
Target Milestone: ---
Created attachment 11178
--> https://sourceware.org/bugzilla/attachment.cgi?id=11178&action=edit
stap-report output on the same box
Consider the following simple forever-running C program:
```C
#include <unistd.h>
int main(void) {
while (1) {
usleep (1000);
}
return 0;
}
```
Compile it and generate `./a.out`:
```
gcc -g -Wall a.c
```
Then start it in one terminal (let's call it terminal A):
```
$ ./a.out
```
It hangs as expected.
Then try running the stap dyninst command like below in another terminal (let's
say, terminal B):
```
$ /opt/stap/bin/stap -e 'probe process("/lib64/libc.so.6").function("usleep") {
println("hi") exit() }' -x `pgrep -f './a.out'` --dyninst
hi
```
It works as expected. And in terminal A, the `./a.out` program is still
running. So far so good.
But now as soon as we run the `stap` command above again, we got the following
error on terminal B:
```
$ /opt/stap/bin/stap -e 'probe process("/lib64/libc.so.6").function("usleep") {
println("hi") exit() }' -x `pgrep -f './a.out'` --dyninst
--FATAL-- #68: Dyninst was unable to attach to the specified process
--FATAL-- #68: BPatch.C[1047]: no process 40758 defined in procsByPid
stapdyn: ERROR: Couldn't attach to the target process
WARNING: /opt/stap/bin/stapdyn exited with status: 1
Pass 5: run failed. [man error::pass5]
```
And in terminal A, the `./a.out` process is already killed too:
```
agentzh@work2 ~ $ ./a.out
Killed
```
This can also be reproduced by a `probe begin` one-liner:
```
agentzh@work2 ~ $ /opt/stap/bin/stap -e 'probe begin { println("hi") exit() }'
-x `pgrep -f './a.out'` --dyninst
hi
agentzh@work2 ~ $ /opt/stap/bin/stap -e 'probe begin { println("hi") exit() }'
-x `pgrep -f './a.out'` --dyninst
--FATAL-- #68: Dyninst was unable to attach to the specified process
--FATAL-- #68: BPatch.C[1047]: no process 40816 defined in procsByPid
stapdyn: ERROR: Couldn't attach to the target process
WARNING: /opt/stap/bin/stapdyn exited with status: 1
Pass 5: run failed. [man error::pass5]
```
I'm using the 3.3 release tag of systemtap on Fedora 27 x86_64:
```
$ /opt/stap/bin/stap --version
Systemtap translator/driver (version 3.3/0.173, commit
release-3.3-0-g48867d1cface)
Copyright (C) 2005-2018 Red Hat, Inc. and others
This is free software; see the source for copying conditions.
tested kernel versions: 2.6.18 ... 4.18-rc0
enabled features: BOOST_STRING_REF DYNINST BPF NLS NSS
```
Also attached the stap-report output for the same box.
Am I doing anything wrong here?
--
You are receiving this mail because:
You are the assignee for the bug.
next reply other threads:[~2018-08-11 0:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-11 0:34 agentzh at gmail dot com [this message]
2018-08-11 0:39 ` [Bug dyninst/23513] " fche at redhat dot com
2018-08-11 0:46 ` agentzh at gmail dot com
2019-04-05 19:07 ` scox at redhat dot com
2019-04-06 1:01 ` scox at redhat dot com
2019-04-10 12:42 ` scox at redhat dot com
2019-12-11 16:25 ` avi@cloudius-systems.com
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