Re: [bkpatch] Multiple threads in core dumps (was: Re: Thread

[Tachino Nobuhiro]

Hello,

At Tue, 12 Mar 2002 11:11:52 +0000 (GMT),
Alan Cox wrote:
> 
> > I am now trying to implement gcore system call on linux and have a 
> > great interest in your patch.
> 
> The old Berkeley gcore wasnt a system call nor did it need to be. Ptrace
> (and in their case grovelling around in /dev/mem) is more than sufficient

  IMHO, implementing gcore with ptrace has some problems, I think. If the process sleeps
  with TASK_UNINTERRUPTIBLE, almost ptrace() calls fails. If the process is already traced,
  you cannot use ptrace().