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Re: [Qemu-discuss] Stopping and snapshoting at arbitrary point

From: Peter Maydell
Subject: Re: [Qemu-discuss] Stopping and snapshoting at arbitrary point
Date: Thu, 4 Jun 2015 08:51:56 +0100

On 4 June 2015 at 06:53, Igor R <address@hidden> wrote:
> Is it possible to stop QEMU at an arbitrary point and save a snapshot?
> I'm using PANDA framework built upon QEMU, and I'm attempting to stop
> and make a snapshot within a PANDA callback, as I described here:
> http://mailman.mit.edu/pipermail/panda-users/2015-April/000359.html
> I was told it wouldn't work due to QEMU limitations. So, my question
> is whether it's possible to force QEMU to update the registers and to
> be prepared for pausing and snapshoting at an arbitrary point?

The best you can do is to force the basic blocks to all be
one instruction long, with the -singlestep option. This will
obviously have a detrimental effect on performance.

-- PMM

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