[vbox-dev] VM-debugger status

Ramshankar ramshankar.venkataraman at oracle.com
Tue Dec 10 03:42:47 UTC 2019


The VM debugger should work in principle but there may be bugs that may 
be specific to CPU hardware features.

The ticket you pointed to for instance, 
(https://www.virtualbox.org/ticket/17348) does not provide sufficient info.

The best way to get a problem solved is by giving us a VBox.log and the 
simplest, smallest reproducible test-case on how to trigger the issue.

Here is what I usually use: "ba x 1 <cs:rip-address>"  That sets a 
breakpoint at the cs:rip you need to break at. Once the breakpoint 
triggers, you can single step using "t" (trace) or continue 
guest-execution using "g" (go).


Regards,

Ramshankar.

On 04/12/19 9:20 PM, felix nasch wrote:
> Hi,
>
> I am wondering what the status of the VM-Debugger[1] is.
>
> I am unable to make it work on a Linux host, regardless of the guest OS.
> A quick search shows that people in the forums[2] and on trac[3] have
> the same problem: The VM can only be paused and resumed, but no
> breakpoints or stepping requests are respected.
>
> Both the thread in the forum and the bug tracker have received no reply.
>
> Has the VM-Debugger been deprecated?
> Or should it still work in principle?
>
> TIA,
> f.
>
>
> [1] https://www.virtualbox.org/manual/ch12.html#ts_debugger
> [2] https://forums.virtualbox.org/viewtopic.php?t=78370
> [3] https://www.virtualbox.org/ticket/17348
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