Re: ptrace problem in 2.6.9
>>>>> On Sat, 23 Oct 2004 01:25:42 -0700, David Mosberger <davidm@linux.hpl.hp.com> said:
>>>>> On Fri, 22 Oct 2004 10:05:57 -0700, Stephane Eranian <eranian@hpl.hp.com> said:
Stephane> Hi Roland, I have some problems with the recent
Stephane> modifications to the Ptrace infrastructure in 2.6.9
Stephane> release. Basically I have the smiple test program attached
Stephane> to this E-mail and it hangs in 2.6.9 but not in
Stephane> 2.6.9-rc4. Somehow the first waitpid() does not return. It
Stephane> is not clear to me why. Is there something Ineed to
Stephane> change in the call itself? I am running all of this on a
Stephane> 2-way IA-64 machine with 2.6.9. I have not tried on x86.
David> Shoot, I think I ran into the same problem yesterday when
David> running the GCC testsuite. In my case, the problem seemed to
David> disappear (mostly) after downgrading "expect" from the
David> "unstable" to the "stable" version, but the symptoms where
David> exactly like in your case: waitpid() didn't return, so I
David> suspect it really was the kernel's fault. I'll try Roland's
David> patch on Monday.
Then again, may be not: it appears that the bug only relates to
PTRACE'd processes, which "expect" is unlikely to do. Oh, well, would
have been too easy.
--david
Reply to: