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

[Nicholas Ford <nicholas.ford@t-online.de>]

Hello Markus,

thanks for the fast response. With the command it works. Thanks :)

Regards,
Nicholas

Am 21.01.2022 um 12:13 schrieb Metzger, Markus T:
> 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
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