Re: [Qemu-devel] Get only TCG code without execution

[Peter Maydell]

On 17 January 2012 01:04, 陳韋任 <address@hidden> wrote:
>> > What is the way out of this? The reason I need TCG code is because my
>> > project work is to write a semantics for TCG micro-operations and then
>> > compare my semantics with a semantics for ARM instructions being written by
>> > someone else. To test my semantics, I need the corresponding TCG code for
>> > several different multi-threaded ARM binaries.
>>
>> Why does this have to be a multi-threaded binary? In the multithreaded
>> case, the instructions executed by QEMU won't be deterministic (it will
>> depend on how the host OS schedules the multiple threads) so it's going
>> to be hard to compare a long trace output to something else.
>
>  I guess Rajat's goal is to compare the "semantics" of TCG ops and ARM binary,
> therefore the non-deterministic might not be the issue. Or he want to use
> "semantics" to solve the non-deterministic problem.

But if you're looking at the semantics at a level where you don't
care about the non-determinism of the threading, you might just
as well look at them at an individual instruction or TB level,
in which case a single threaded program is just as good and less
confusing, surely?

-- PMM