[Qemu-devel] Re: Missing singlestep for already-translated code?

[Jan Kiszka]

Jun Koi wrote:
> Hi,
> 
> I am looking into the singlestep command in monitor interface, and it
> seems that we only take into account the singlestep flag when we are
> translating code.
> So for the already-translated code, we will miss singlestep?

This feature is broken. For TCG, it should at least flush the
translation buffer, and for KVM it has to enable single-stepping in the
kernel. That's what happens automatically when you call cpu_single_step.
I guess 'singlestep' wants to be somehow orthogonal to this. But this is
the wrong approach.

Does anyone actually used this feature or still does so? It looks fairly
redundant to me, kind of a poor-man's gdb front-end as part of the
monitor console.

Jan

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