DirectSSH sample works, but target hangs after a minute or so

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  • February 26, 2018 at 11:51 #20269
    maiorfi
    Participant

    Hi. I succeeded in following https://sysprogs.com/VisualKernel/tutorials/directssh/ sample using two VirtualBox Ubuntu 17 machines, but after having run a debugging session without hiccups (breakpoint, printk tracing, etc.) for a minute or so, suddenly target machine hangs, and I have to reset it in order to start a new debug session.

    What could be the cause of that issue?

    Thanks!

    February 26, 2018 at 12:01 #20270
    maiorfi
    Participant

    …I don’t know if it is relevant, but the last line I can read on VisualKernel Program Output (just below log line printed by module_init function) is “rfkill: input handler disabled”.

    February 27, 2018 at 04:14 #20279
    support
    Keymaster

    Hi,

    The debug part of the Linux kernel is relatively buggy – unless you are using JTAG or the VMWare debug stub that runs outside the kernel, the debugging functionality will run inside the kernel and may eventually lock up when the debugger-related logic tries to access some kernel resources that are used by some other part. VisualKernel does its best working around known instances of this, however there are still many cases when debugging is not reliable.

    For best debugging experience we recommend using the VMware GDB stub that runs outside the kernel.

    March 5, 2018 at 13:06 #20320
    maiorfi
    Participant

    Hi. I tried same test on a VMWare virtual machine target, and it works a treat!

    Thanks.

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