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  1. Qt
  2. QTBUG-86704

(Remote) debugging in conjunction with QProcess not possible (gdbserver: PID mismatch!)

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Not Evaluated
    • Resolution: Duplicate
    • Affects Version/s: 5.15.1
    • Fix Version/s: None
    • Component/s: Core: Other
    • Labels:
      None
    • Environment:
      - Distribution: Arch Linux
      - QtCreator 4.13.0
      - GDB 9.2
      - GCC 10.2.0
      - Kernel: Linux archlinux 5.8.9-arch2-1
    • Platform/s:
      Linux/X11

      Description

      I have code which must run with root privileges. To be able to debug it with QtCreator I have created a "Kit" with a "Generic Linux Device" in QtCreator, which connects to the localhost with a SSH key as user root.
      My code starts external processes via QProcess. When calling the function start() on my QProcess member variable the debugger ends with the following error message:

      gdbserver: PID mismatch! Expected 1292, got 1286
      gdbserver: Cannot find thread after clone.

      Child exited with status 0

      The code in the attachment is sufficient to trigger the problem.
      With Qt 5.15.0 it is working fine, since 5.15.1 the debugger crashs.

      I have previously reported the bug to the distribution: https://bugs.archlinux.org/task/67904

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              Assignee:
              thiago Thiago Macieira
              Reporter:
              matthias_klein Matthias Klein
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                Created:
                Updated:
                Resolved:

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