RE: Re: [RFC] canonical linespec and multiple breakpoints ...

[Avi Gozlan <avi@checkpoint.com>]

Any reference to the below issues would be appreciated. Thanks.

-----Original Message-----
From: Avi Gozlan 
Sent: Sunday, September 18, 2011 1:22 PM
To: 'Tom Tromey'; 'gdb-patches@sourceware.org'
Cc: Avi Gozlan; Matan Ben Gur
Subject: Re: [RFC] canonical linespec and multiple breakpoints ...

Hello,

On the basis of your proposal dealing with supporting multiple breakpoints
and the discussion that followed it, I would like to raise some questions. 
These issues are highly relevant for our needs (the need was first described
in bug 12313 in the GDB bug database).

Among varying GDB uses, we use GDB to debug a process which loads (using 
dlopen) the same exact library multiple times (in fact there are copies of
the library otherwise dlopen returns the same handle for each load). We find
your proposal very useful for us to be able to attach to the process and 
debug a specific library. Though, we do have some questions and suggestions.
Pardon technical inaccuracies in GDB terminology.

1) The proposal discusses function breakpoints. Will it also enable 
inspecting global and static variables from a specific library?

2) Just to make sure we understand the interaction of the user interface 
with "set multiple-symbols": it will be possible to request GDB for a 
specific variable/function by a library name without getting it from all
libraries or get a question (ask) each time, right? Otherwise it will be
very inconvenient to inspect multiple variables within a given library.

3) Will the library specific interface know how to handle non-stripped 
libraries that are compiled without debug information (no "-g")?

4) We suggest adding an option to enable the GDB backtrace command to 
show the library name for each function. In our usage case we have 
scenarios in which the libraries interact with each other and a backtrace 
showing the library name for each function can enable us understand the 
interaction perfectly.

5) Perhaps a little pedantic but what about handling symbols with 
different names in libraries with identical name which lie in different 
paths?

Thanks,

Avi