Re: Towards multiprocess GDB

Paul Koning
2008-07-18T20:50:48Z

>>>>> "Stan" == Stan Shebs <stanshebs@earthlink.net> writes:

Stan> When it's time to run, the user will want the ability to run
Stan> anywhere from one to all of the programs, each with its own
Stan> argument list. It should be possible to do this with a single
Stan> command, so that the user isn't scrambling to put in all the
Stan> run commands quickly enough.

Nice.

Do we need a way to specify a different environment for each program?

Stan> Implementationwise, we will need to replace the single exec
Stan> target with a list of execs, and modify symbol machinery to
Stan> support a many-many relationship between programs and symbol
Stan> tables. Although my inclination is to create a new symbol table
Stan> for each process' image of each shared library, that may be
Stan> excessively expensive.

Indeed it might be excessive. Avoiding it means adding the notion of
per-program offsets, so program A can map library L at offset X, while
program B maps that same library at offset Y.

Stan> In addition to thoughts on desired user interface, I would
Stan> welcome suggestions on how to add this feature incrementally;
Stan> the abovementioned bits are a lot to add all at once!

You mentioned threads in passing. Those are still needed, so you need
to allow multiple programs each of which may have multiple threads.

paul