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Re: [cdt-dev] Question about change events on CMemoryBlockExtension


Thanks for the reply - sorry for the delay in replying, as I have been on vacation.

I have traced the events that are being received by my plugin. It seems that I *always* receive a CHANGE before the SUSPEND. Is this what you would expect? If not, any suggestions on what I am doing wrong?


Mikhail Khodjaiants wrote:

The CHANGE event fired after RESUME but before SUSPEND is used to reset the memory view. Another CHANGE event is fired after SUSPEND to notify the memory view that memory has changed.

----- Original Message ----- From: "Derek Morris" <dmsubs@xxxxxxxxxxxxx>
To: "CDT General developers list." <cdt-dev@xxxxxxxxxxx>
Sent: Wednesday, July 05, 2006 1:34 PM
Subject: [cdt-dev] Question about change events on CMemoryBlockExtension


I am writing a plugin that displays some data out of a (debug target's)
memory. I have allocated a CMemoryBlockExtension and am able to get data
out correctly.

I have a DebugEventHandler which is monitoring for DebugEvent.CHANGE
events on the CMemoryBlockExtension, which I am seeing OK. So, while the
program is supended on a breakpoint, I can use the Memory monitor to
change the memory I am displaying. I see the change, and am able to
update my display.

When I step the program, I see the CHANGE event, so try to update my
display. However, if I try to getBytesFromAddress on seeing the CHANGE
event, I get an exception that 'The target is not suspended'.

So, I decided to monitor for DebugEvent.SUSPEND and DebugEvent.RESUME
messages. It seems that I am seeing the CHANGE event after the RESUME,
but before the SUSPEND...

What is the correct protocol for using the CHANGE event and to then read
the memory that has changed?

BTW: If it makes any difference, I am using GDB to a remote (embedded)
debug target.

Thanks in advance for any help you can provide.

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