Re: [platform-debug-dev] Debug Event Sets

[Darin_Wright@xxxxxxx]

JPDA does support this. Please see 'EventSet' description at:

http://java.sun.com/j2se/1.4/docs/guide/jpda/jdi/index.html

Our java debug model currently processes events in sets (internally), but fires them sequentially.

Darin

Jed_Anderson@xxxxxxx Sent by: platform-debug-dev-admin@xxxxxxxxxxx 02/27/2002 02:50 PM Please respond to platform-debug-dev

To:        platform-debug-dev@xxxxxxxxxxx         cc:                 Subject:        Re: [platform-debug-dev] Debug Event Sets

Sorry for the miscommunication.  I am curious if this support is being
added because of non-JDI debug targets (e.g. PICL, gcc, etc), because I
don't see any way that the JDI Debug Model would ever be able to safely
call this method.

jkca



                                                                                                                                        
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                      02/27/2002 12:53 PM                                                                                               
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Yes - this is for all debug models.

Darin


                                                                          
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Darin,

Just a clarification, is this to support non-JDI debug models?

jkca




                     Darin_Wright@xxxxxxx

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[platform-debug-dev] Debug Event Sets


                     02/27/2002 09:33 AM

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                     platform-debug-dev







An issue has been raised with debug event notification in the debug
platform.

It is possible that a debug model may want to fire a set of events that
occurred simaltaneously, rather than individual events. For example, it is
possible that a "step end" and a "breakpoint" are hit at the same time. In
this case two events are fired in sequence rather than together in a set.
This can lead to errors for clients processing the events. For example, a
client may decide to resume a thread when a step event has completed. It
then receives a breakpoint event notification, which is now out-of-date
(the thread has already resumed). It would be more accurate, and allow
debug event processors to make better decisions, if we provided an event
set.

I propose that we add a new event listener interface to the debug platform
that looks like this

IDebugEventSetListener
       public void handleDebugEvents(IDebugEvent[] events)

As well, we would add a method to the DebugPlugin to fire event sets. In
order not to break existing event handler clients, and allow for simple
event processing, the old interface would remain. When an event set is
fired, event set listeners receive the event set as a whole, and (old)
event listeners would receive the events in sequence. Debug event filtering
would remain as is. Each event in an event set would be applied to
registered filters before an event is fired.

Comments welcome. As we intend to stabalize the debug API for milestone 4
(March 15), comments are welcome ASAP.

Darin



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