Bug 179874 – Adding an observer for the frysk app hangs the application

Bug 179874 - Adding an observer for the frysk app hangs the application

Summary:	Adding an observer for the frysk app hangs the application

Status:	CLOSED CURRENTRELEASE

Aliases:	None

Product:	Red Hat Enterprise Linux 4
Classification:	Red Hat
Component:	frysk (Show other bugs)
Sub Component:
Version:	4.0
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Phil Muldoon
QA Contact:
Docs Contact:

URL:
Whiteboard:
Keywords:	Reopened

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2006-02-03 10:58 EST by Jeffrey Moyer
Modified:	2007-11-30 17:07 EST (History)
CC List:	1 user (show)

See Also:
Fixed In Version:	4.4
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2006-11-30 10:48:45 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Sourceware	2285	None	None	None	Never

Groups: None (edit)

Description Jeffrey Moyer 2006-02-03 10:58:35 EST

Description of problem:

Of course you shouldn't do this, but if you try to add an observer to frysk, it
hangs.  I get this on the terminal:

click : frysk.gui.monitor.ProcData@4e0f110
Exception in thread "Thread-2" ptrace.attach: Operation not permitted (process 6707)
   at java.lang.Exception.Exception() (/usr/lib/libgcj.so.6.0.0)
   at java.lang.RuntimeException.RuntimeException() (/usr/lib/libgcj.so.6.0.0)
   at java.lang.Thread.run() (/usr/lib/libgcj.so.6.0.0)


Version-Release number of selected component (if applicable):

frysk-0.0.1.2005.12.14.15.12-0.EL4.3

How reproducible:
100%

Steps to Reproduce:
1.  Install frsyk
2.  as a user, sudo frysk
3.  add any observer for the frysk process
  
Actual results:
frysk hangs

Expected results:
the observer is not added, but the app continues to run (maybe displays a warning?)

Additional info:

Comment 1 Andrew Cagney 2006-02-06 15:42:44 EST

upstream bug

Comment 2 Andrew Cagney 2006-11-30 10:37:15 EST

Upstream bug: http://sourceware.org/bugzilla/show_bug.cgi?id=2285

Comment 3 Andrew Cagney 2006-11-30 10:40:53 EST

Fixed in RHEL4-U3's update and upstream, no longer allowed to attach to such
processes.

Comment 4 Andrew Cagney 2006-11-30 10:47:03 EST

wrong curent release

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