Re: [Qemu-devel] [RFC PATCH 0/3] (Resend) TranslationBlock annotation mechanism

[Peer Adelt <peer.adelt@c-lab.de>]

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On 14.01.2016 11:55, Peer Adelt wrote:
> Hey guys :)
>
> We have developed a generic concept to annotate TranslationBlocks during
> runtime. The initial idea was to use it for time annotation with data from
> static analysis tools. However, we have kept this approach as generic as
> possible to allow other kinds of annotation (e.g. power consumption, etc.).
>
> Our extension expects an XML file specifying the CFG of the program (similar
> to what you get from "gcc -ftree-dump-cfg"), where the edges are annotated
> with the data, that QEMU ought to accumulate during program execution. Each
> edge has a source and target context in which it is executed.
> For example: a for-loop that runs several times has its own context dependent
> edge for each iteration. We plan on making this more flexible by allowing
> to specify iterative context edges, i.e. from context n to context n+1.
>
> This approach is not limited to one target architecture but we only tested
> it for ARM and TriCore so far.
>
> To show the current state of this patch we have attached a very small example
> consisting of an ARM STM32F205 program and a timing annotation XML file (see
> reply to this letter). You can provide the XML file to QEMU with the
> "-annotation <XML-File>" option. During execution, the "value_sum" field of
> the CPUState data structure will accumulate a total value of 70 (cycles).
>
> Are there any comments? Is this in general a good idea to be added to upstream
> QEMU?
>
> All the best,
> Peer
>
> Peer Adelt (3):
>    tb-annotation: Added annotation XML file parser
>    tb-annotation: Add control flow graph mapper
>    tb-annotation: Activate annotation extension
>
>   Makefile                                     |   5 +-
>   Makefile.objs                                |   4 +
>   Makefile.target                              |   4 +-
>   configure                                    |  13 ++
>   include/exec/gen-icount.h                    |  18 +++
>   include/qom/cpu.h                            |   9 ++
>   include/tb-annotation/tb-annotation-parser.h |  29 +++++
>   include/tb-annotation/tb-annotation.h        |  64 ++++++++++
>   qemu-options.hx                              |   8 ++
>   tb-annotation/Makefile.objs                  |   1 +
>   tb-annotation/tb-annotation-parser.c         | 174 +++++++++++++++++++++++++++
>   tcg-runtime.c                                |  99 +++++++++++++++
>   tcg/tcg-runtime.h                            |   4 +
>   vl.c                                         |  25 ++++
>   14 files changed, 454 insertions(+), 3 deletions(-)
>   create mode 100644 include/tb-annotation/tb-annotation-parser.h
>   create mode 100644 include/tb-annotation/tb-annotation.h
>   create mode 100644 tb-annotation/Makefile.objs
>   create mode 100644 tb-annotation/tb-annotation-parser.c
>
See attachment

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