Re: [Simulavr-devel] Address of breakpoints from source lines

[Sebastian]

Am Freitag, den 18.06.2010, 15:23 +0200 schrieb ThomasK:
> Hi,
> 
> I'm again ... ;-)
> 
> Sebastian schrieb:
>  > Hi,
>  > is there a way to get breakpoint-adresses for source code lines
>  > directly from simulavr (with the python interface)?
> 
> I'ts possible to set and remove breakpoints by python interface, see 
> method assertInitDone in regress/modules/simtestutil.py. You use the 
>From looking at this and at example.py, I got the impression that, to
"continue" from a breakpoint, you must delete it. And to recognize that
a breakpoint was reached, you test if getCurrentTime returns increasing
values when you call doRun?

Is there a way to have non-blocking breakpoints, where only a callback
is called?

What would be the advantage of simulavr-breakpoints over checking PC
after Step()-ing in single steps in a python script? Better performance
because the inner loop is completely in C++?

> If you want to get addresses for every source 
> line, you have to read it out from elf file before!
...
> I'm not sure, if there is a possibility with the BFD interface
In this manual: http://sourceware.org/binutils/docs-2.20/bfd/index.html
I found a chapter on how to read line numbers from COFF. In the ELF
backend chapter, there isn't very much:
http://sourceware.org/binutils/docs-2.20/bfd/elf.html#elf


My method (Popen avr-gdb) works for me, so I don't have a big need to
extend simulavr right now. But if more users need this feature (get
adress of breakpoint by line) it's maybe worth to implement in simulavr.

greetings,
Sebastian