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Re: [Qemu-devel] full dynamic instruction trace for MIPS target
From: |
Vince Weaver |
Subject: |
Re: [Qemu-devel] full dynamic instruction trace for MIPS target |
Date: |
Mon, 5 Apr 2010 21:41:52 -0400 (EDT) |
> I think the correct way to get the full instruction trace on a MIPS
> emulated processor is:
the way you describe is slow because you are constantly re-generating the
TBs. The best way to do this is to add your instrumentation to the TBs.
I have code that does that for a recent version of Qemu here:
http://www.csl.cornell.edu/~vince/projects/qemusim/
although it outputs Basic-Block vectors, not a full memory trace like you
want. It has been validated to match proper instruction counts using
hardware performnce counters though.
I also have code creating full instruction/memory traces for Qemu MIPS
that can be found here:
http://www.csl.cornell.edu/~vince/projects/qemu-trace/
but it's against Qemu from 2007 pre-dating the TCG changeover so of
limited use probably. I hvae some code somewhere that updated this to
work with TCG but I don't know what happened to it.
Vince