[Bug server/17760] gdbserver (MinGW) reports incorrect pid for a process being debugged

["palves at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17760

Pedro Alves <palves at redhat dot com> changed:

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                 CC|                            |palves at redhat dot com

--- Comment #1 from Pedro Alves <palves at redhat dot com> ---
"42000" is a magic internal PID number that GDB uses whenever it can't figure
out the target's pid.  

On GNU/Linux, GDBserver activates the multi-process extensions 
(target_supports_multi_process) and thus GDB knows the real inferior's PID.

The trouble is that gdbserver's Windows backend doesn't support multi-process,
and so gdbserver doesn't tell GDB the real PID of the process.

Maybe we could activate the extensions even if the target backend can't debug
more than one process at a time.  We'd need to make server.c refuse vRun /
vAttach if already debugging a process, on !target_supports_multi_process
targets, but it would probably works.

(tbc, not going to do it myself)

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