Re: [Qemu-devel] TCG flow vs dyngen

[Dushyant Bansal <cs5070214@cse.iitd.ac.in>]

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>> You should see this pdf 
>> (www.ecs.syr.edu/faculty/yin/Teaching/TC2010/Proj4.pdf). It talks 
>> about tracing the instructions.
>>
>> --
>> Dushyant
> Wow thank you! It sounds incredibly interesting!!
>> What we really need is to insert a function call into the
>> translated code, so when each instruction is executed at runtime, our 
>> inserted function will be
>> executed.
> Again wow!! Is that really possible? Some sort of callback triggered 
> at every instruction execution?
Yes, this mechanism works. I have written a code to count different 
kinds of instructions.
> Do you have any another document explaining that?
No. But maybe you can try to understand this through qemu source code. 
Here are some resources for that 
http://stackoverflow.com/questions/4501173/a-call-to-those-who-have-worked-with-qemu
> This pdf just gives instructions on how to do it on an old version of 
> qemu (disas_insn doesn't exist at all on my code now), and does not 
> explain what it is, what's behind that suggested code ..
> Also the code for single step would be of great help to me! I really 
> needed that.. but when I tried it on qemu-user didn't work at all..
It exists in file qemu/target-i386/translate.c You are also talking 
about qemu source code privided here http://wiki.qemu.org/Download, right?
If you need, I can give the source code of counting implementation with 
some documentation.
Hope this helps.

--
Dushyant

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