Re: [Qemu-devel] [PATCH 00/13] instrument: Add basic event instrumentation

[Peter Maydell]

On 26 August 2017 at 01:02, Emilio G. Cota <address@hidden> wrote:
> An additional "nice to have" would be:
>
> * Allow inlining of TCG code by the instrumenter. Example use case:
>   the instrumenter wants to increment a counter every time a
>   basic block is executed. Instead of calling a callback function on every 
> block's
>   execution, we could just have a translation-time callback to emit at the 
> beginning
>   of the translated block the counter increment. This would be much faster, 
> and
>   is something that all other tools (e.g. DynamoRIO/Pin) implement.

This is a feature I would strongly prefer us not to implement.
It exposes too much of QEMU's internals (ie TCG) to the
instrumentation, and it would be pretty complicated to use.

thanks
-- PMM