Re: [tcf-dev] Problem planting breakpoints

[Eugene Tarassov <eugene.tarassov@xxxxxxxxxx>]

Hi Stefan,

It looks like all you need is an array of breakpoint addresses - int[] breakpoint_address. This is very easy to do: define variable for the array, add address to the array in cpu_bp_plant(), remove address from the array in cpu_bp_remove(). That's it. You don't need to call iterate_breakpoints(), you should not map breakpoints to their actual memory addresses - this is all done by the Breakpoints service. cpu_bp_remove() getting called is not an indication of a problem - it is normal that Breakpoints service removes breakpoints and then re-plants them back. By the time to call CLIDevice_RunUntil(), you will have valid breakpoint_address array.

Regards,
Eugene

-----Original Message-----
From: tcf-dev-bounces@xxxxxxxxxxx [mailto:tcf-dev-bounces@xxxxxxxxxxx] On Behalf Of Stefan.Falk@xxxxxxxxxxxx
Sent: Friday, May 16, 2014 8:47 AM
To: tcf-dev@xxxxxxxxxxx
Subject: [tcf-dev] Problem planting breakpoints

Hi and sorry for my third E-Mail today but I seem to have a major issue with the way how breakpoints are set and removed.

Like I said a few times already, all I got is a function CLIDevice_RunUntil(int[] breakpoint_address) to set breakpoints and run my device under debug.

Therefore I call iterate_breakpoints() to collect all file locations and map them to their actual memory addresses.

My problem is still that after the program reaches a  breakpoint, the TCF Agent begins to "plant" breakpoints. The problem isn't that by doing so cpu_bp_plant() gets called and therefore CLIDevice_PlantBreakpoint() gets called, the problem is that immediately after that cpu_bp_remove() is getting called.

I have no idea why this is happening. All I can tell so far is that InstructionRef ref->cnt in validate_bi_refs is zero for some reason the "dirty" flag of BreakInstruction is TRUE gets set there. Therefore it gets deleted later on.

I'm really really stuck here. I've tried the whole day to find out what is wrong but I really don't understand the underlying reason why the agent wants to remove my breakpoints ..

Thanks for your help.

--
Stefan Falk

Infineon Technologies Austria AG
Trainee
Automotive Sense and Control
Component Verification

Tel:  +43 (0)5 / 1777 - 5439
Email: stefan.falk@xxxxxxxxxxxx<mailto:stefan.falk@xxxxxxxxxxxx>

"Aim above the mark to hit the mark." - Ralph Waldo Emerson



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