RE: GDB Debugging multiple instances of the same application and continue simultaneous

["Metzger, Markus T" <markus.t.metzger@intel.com>]

Hello Nicholas,

Have you tried "set schedule-multiple on"?

Regards,
Markus.

>-----Original Message-----
>From: Gdb <gdb-bounces+markus.t.metzger=intel.com@sourceware.org> On
>Behalf Of Nicholas Ford
>Sent: Friday, January 21, 2022 12:08 PM
>To: gdb@sourceware.org
>Subject: GDB Debugging multiple instances of the same application and continue
>simultaneous
>
>Hello,
>
>
>I try to debug two instances of the same application and try to make
>them continue simultaneous. I used the following sequence of commands:
>
>(gdb) set target-async on
>(gdb) set non-stop on
>(gdb) attach <pid1>
>(gdb) set scheduler-locking off
>(gdb) add-inferior
>(gdb) inferior 2
>(gdb) attach <pid2>
>(gdb) set scheduler-locking off
>(gdb) b hello-world.cpp:8
>Breakpoint 1 at 0x557a557761fd: ../hello-world.cpp:8. (2 locations)
>(gdb) continue
>
>But only the process of the current inferior is continuing. I tried it
>with the following configurations:
>
>  * Setting 1
>      o OS: Windows 10 Version 2004
>      o GDB: GNU gdb (GDB) 12.0.50.20220115-git
>      o Behavior: not even possible to switch back to inferior 1: Is it
>        a known issue that this is not working on Windows?
>  * Setting 2
>      o OS: Windows 10 Version 2004 using WSL (Ubuntu)
>      o GDB: GNU gdb (Ubuntu 9.2-0ubuntu1~20.04.1) 9.2
>      o Behavior: Only the currently selected inferior is continuing
>  * Setting 3
>      o OS: Ubuntu 20.04.3 LTS
>      o GDB: GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2
>      o Behavior: Only the currently selected inferior is continuing
>
>Can you please guide me if I got it wrong (regarding the feature of
>running multiple processes simultaneous in GDB) or this specific feature
>is not available for the given OS versions (if yes which version should
>work)?
>
>Best regards,
>Nicholas Ford
Intel Deutschland GmbH
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