lkml.org 
[lkml]   [2000]   [Mar]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    SubjectRe: Allow debuger to examine real parent
    Hi!

    > > It doesn't. ps reports the tracing process as the parent, rather than
    > > reporting the original parent as the parent. AFAIK, ps gets its info from
    > > /proc, and you can verify that every occurrence of 'pptr' in the proc code is
    > > 'p_pptr' (referring to the parent) rather than p_opptr (referring to the
    > > original parent).
    >
    > Hmm.. That's probably a bug. It would probably be best to export the
    > original parent in the /proc setup, and make the "debugging parent"
    > possibly visible some way (but the original parent should be the normal
    > one).

    Ok, it is a bug and here is a fix:

    --- clean/fs/proc/array.c Fri Feb 11 23:11:41 2000
    +++ linux/fs/proc/array.c Thu Mar 9 00:11:08 2000
    @@ -151,12 +151,13 @@
    "State:\t%s\n"
    "Pid:\t%d\n"
    "PPid:\t%d\n"
    + "TracerPid:\t%d\n"
    "Uid:\t%d\t%d\t%d\t%d\n"
    "Gid:\t%d\t%d\t%d\t%d\n"
    "FDSize:\t%d\n"
    "Groups:\t",
    get_task_state(p),
    - p->pid, p->p_pptr->pid,
    + p->pid, p->p_opptr->pid, p->p_pptr->pid != p->p_opptr->pid ? p->p_opptr->pid : 0,
    p->uid, p->euid, p->suid, p->fsuid,
    p->gid, p->egid, p->sgid, p->fsgid,
    p->files ? p->files->max_fds : 0);
    @@ -327,7 +328,7 @@
    task->pid,
    task->comm,
    state,
    - task->p_pptr->pid,
    + task->p_opptr->pid,
    task->pgrp,
    task->session,
    task->tty ? kdev_t_to_nr(task->tty->device) : 0,
    Pavel
    --
    I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
    Panos Katsaloulis describing me w.r.t. patents me at discuss@linmodems.org

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.rutgers.edu
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:56    [W:0.020 / U:32.636 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site