[Qemu-devel] [Bug 1808565] [NEW] Reading /proc/self/task/<pid>/maps is not remapped to the target

[Qemu-devel] [Bug 1808565] [NEW] Reading /proc/self/task/<pid>/maps is not remapped to the target

[Alan Jones]

Public bug reported:

Seeing this in qemu-user 3.1.0

The code in is_proc_myself which supports remapping of /proc/self/maps
and /proc/<pid>/maps does not support remapping of
/proc/self/task/<pid>/maps or /proc/<pid>/task/<pid>/maps. Extending
is_proc_myself to cover these cases causes the maps to be rewritten
correctly.

These are useful in multithreaded programs to avoid freezing the entire
program to capture the maps for a single tid.

** Affects: qemu
     Importance: Undecided
         Status: New

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Title:
  Reading /proc/self/task/<pid>/maps is not remapped to the target

Status in QEMU:
  New

Bug description:
  Seeing this in qemu-user 3.1.0

  The code in is_proc_myself which supports remapping of /proc/self/maps
  and /proc/<pid>/maps does not support remapping of
  /proc/self/task/<pid>/maps or /proc/<pid>/task/<pid>/maps. Extending
  is_proc_myself to cover these cases causes the maps to be rewritten
  correctly.

  These are useful in multithreaded programs to avoid freezing the
  entire program to capture the maps for a single tid.

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[Bug 1808565] Re: Reading /proc/self/task/<pid>/maps is not remapped to the target

[Thomas Huth]

The QEMU project is currently considering to move its bug tracking to another system. For this we need to know which bugs are still valid and which could be closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state back to "New" within the next 60 days, otherwise this report will be marked as "Expired". Or mark it as "Fix Released" if the problem has been solved with a newer version of QEMU already. Thank you and sorry for the inconvenience.

** Changed in: qemu
       Status: New => Incomplete

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Title:
  Reading /proc/self/task/<pid>/maps is not remapped to the target

Status in QEMU:
  Incomplete

Bug description:
  Seeing this in qemu-user 3.1.0

  The code in is_proc_myself which supports remapping of /proc/self/maps
  and /proc/<pid>/maps does not support remapping of
  /proc/self/task/<pid>/maps or /proc/<pid>/task/<pid>/maps. Extending
  is_proc_myself to cover these cases causes the maps to be rewritten
  correctly.

  These are useful in multithreaded programs to avoid freezing the
  entire program to capture the maps for a single tid.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1808565/+subscriptions

[Bug 1808565] Re: Reading /proc/self/task/<pid>/maps is not remapped to the target

[Peter Maydell]

Code inspection shows we still don't handle /proc/self/task.


** Changed in: qemu
       Status: Incomplete => Confirmed

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Title:
  Reading /proc/self/task/<pid>/maps is not remapped to the target

Status in QEMU:
  Confirmed

Bug description:
  Seeing this in qemu-user 3.1.0

  The code in is_proc_myself which supports remapping of /proc/self/maps
  and /proc/<pid>/maps does not support remapping of
  /proc/self/task/<pid>/maps or /proc/<pid>/task/<pid>/maps. Extending
  is_proc_myself to cover these cases causes the maps to be rewritten
  correctly.

  These are useful in multithreaded programs to avoid freezing the
  entire program to capture the maps for a single tid.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1808565/+subscriptions

[Bug 1808565] Re: Reading /proc/self/task/<pid>/maps is not remapped to the target

[Thomas Huth]

This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/222


** Changed in: qemu
       Status: Confirmed => Expired

** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #222
   https://gitlab.com/qemu-project/qemu/-/issues/222

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https://bugs.launchpad.net/bugs/1808565

Title:
  Reading /proc/self/task/<pid>/maps is not remapped to the target

Status in QEMU:
  Expired

Bug description:
  Seeing this in qemu-user 3.1.0

  The code in is_proc_myself which supports remapping of /proc/self/maps
  and /proc/<pid>/maps does not support remapping of
  /proc/self/task/<pid>/maps or /proc/<pid>/task/<pid>/maps. Extending
  is_proc_myself to cover these cases causes the maps to be rewritten
  correctly.

  These are useful in multithreaded programs to avoid freezing the
  entire program to capture the maps for a single tid.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1808565/+subscriptions