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This is particularly interesting if you are watching a very large treeYes, that would be good. I think that if things like breakpoint locations include an exec name, then inferior control need do nothing more than catch the fork/exec, and let the programs with nonmatching names continue on without further ado.
of processes. It would be nice if gdb did not have eagerly to read
symbols for every program.
Another idea, related to something in HPD, would be to come up with aWe're going to want some sort of syntax, don't want to commit to any particular character(s) yet. :-)
general syntax for naming things -- like "#PID#file.c:function" (or
what have you) -- so the user can easily embed a context into a name.
(I dunno if this is useful, I'm just brainstorming a bit.)
I'm thinking one may want to flush symbol tables, so as to reduce ambiguity. Otherwise you could end up with more and more versions of main() over time, and very long selection menus in response to "break main", but with many or most of the entries being for programs not actually being debugged at the moment.Stan> Conversely, the user will also want a way to take programs out Stan> of the debugging session. This is not quite the same as Stan> detaching, because the user may want, say, the server to Stan> continue doing its serving thing
I don't understand the distinction here. With 'detach' the server
would continue serving... what am I missing?
That's a really great scenario to keep in mind, and totally doable I think, though maybe not on the first iteration. :-)Stan> Although my inclination is to create a new symbol table for each Stan> process' image of each shared library, that may be excessively Stan> expensive.
To me this sounds important to solve, though of course I have no
numbers. I am just thinking that every program is going to be mapping
in libc, and it would be great to scale to a large number of inferiors.
FWIW the particular scenario I am interested in is running "make check"
in the gcc tree, under gdb, and having it stop only when some
sub-process gets a SEGV. So, the question is, how does gdb react to
thousands of process creations and deletions, how eagerly does it read
and discard symbol table info, etc.
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