Which MI behavior is correct ?

[Maxim Grigoriev]

Hello GDB experts,

I wonder if somebody can help me to understand which
GDB MI behavior is supposed to be correct.

I've included the test case, the MI commands used, and
the outputs from two debuggers: the native FC5 Linux-X86

    GNU gdb Red Hat Linux (6.3.0.0-1.134.fc5rh)

and ours

    GNU gdb 6.5 Xtensa Tools 7.1.0-development

Our GNU gdb 6.5 is consistent with the top of the FSF tree.


PROBLEM DESCRIPTION:
====================

When we hit the breakpoint inside f11() second time:

In case of 6.3 we have :

228^done,changelist=[{name="var3",in_scope="true",type_changed="false"}]
(gdb)
229^done,changelist=[{name="var4",in_scope="true",type_changed="false"}]
(gdb)
230^done,value="3"
(gdb)
231^done,value="2"
(gdb)

In in case of 6.5+ we have :

228^done,changelist=[{name="var3",in_scope="false"}]
(gdb)
229^done,changelist=[{name="var4",in_scope="false"}]
(gdb)
230^done,value="2"
(gdb)
231^done,value="1"
(gdb)

So "var3" and "var4" are out of scope.

Our GUI front-end relies on the 6.3-like behavior, which is consistent with
what we had in our previous releases based on GNU gdb 5.2.1.

QUESTIONS
=========

1) Is 6.5(+)-style behavior incorrect ?

   If it is correct:

    - Are we supposed to recreate variables each time we enter the 
function ?
    - Is this efficient ?

2) Where can I find a good documentation describing these aspects of GDB 
MI ?
   All docs I found on the Internet weren't quite helpful.

Thanks in advance for any of your help.

-- Maxim












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