http://dom.as/2009/12/29/when-bad-things-happen/ Sat, 17 Dec 2011 20:14:59 +0000 hourly 1 http://wordpress.com/ http://dom.as/2009/12/29/when-bad-things-happen/#comment-1733 Tue, 29 Dec 2009 21:55:54 +0000 http://mituzas.lt/?p=715#comment-1733 Mark, there’s no easy syscall/ptrace module either in perl nor python nor php. ‘make a’ works though :-)

]]> http://dom.as/2009/12/29/when-bad-things-happen/#comment-1732 Tue, 29 Dec 2009 19:36:23 +0000 http://mituzas.lt/?p=715#comment-1732 A Perl/Python version of this would be easier to use.

]]> http://dom.as/2009/12/29/when-bad-things-happen/#comment-1731 Tue, 29 Dec 2009 17:23:10 +0000 http://mituzas.lt/?p=715#comment-1731 There was an issue on rhel4 where if a tracing process didn’t call ptrace detach that the thread group leader would stay in traced state. If someone sent it a SIGCONT the thread group leader would continue and all the child threads would go into a traced state (T in ps). A second SIGCONT would bring it back to normal. Between the two signals a ps ax would show only the thread group leader status. Be sure to check the threads in ps to make sure none of them are in a traced state.

]]>