[Qt-creator] LLDB CPU usage 100% on macOS Catalina (10.15)

[Michael Jackson]

Xcode 11 includes its own Python 3.7 that LLDB is using. Xcode 10 did not have any python and used the system python 2.7 located in /usr/bin/python. I have added some traces from Xcode 10 and Xcode 11 to the bug report mentioned. Hopefully the QtCreator devs can reproduce this issue and find a fix.

I tried the brute force of moving to the side the embedded Python 3.7 inside of Xcode 11.3 package but then when trying to launch LLDB just stalled and wouldn't go any further. I did not have time to get a trace. Hopefully this all helps in some way.

I'm not sure if I can use Xcode 10 on macOS Mojave?

--
Mike Jackson 

On 12/9/19, 3:26 PM, "Jason H" <jhihn at gmx.com> wrote:

    Interestingly clang for android does not have the same problem.
    
    > Sent: Friday, December 06, 2019 at 2:35 PM
    > From: "Michael Jackson" <mike.jackson at bluequartz.net>
    > To: "Jason H" <jhihn at gmx.com>
    > Cc: Qt-creator <qt-creator at qt-project.org>
    > Subject: Re: [Qt-creator] LLDB CPU usage 100% on macOS Catalina (10.15)
    >
    > Initially looks like an issue with the Xcode 11.2 version. Our OS versions are different but Xcode is the same.
    > 
    > --
    > Mike Jackson 
    > 
    > On 12/6/19, 1:49 PM, "Jason H" <jhihn at gmx.com> wrote:
    > 
    >     Mine is only 15" running 10.14.6
    >     XCode Version 11.2 (11B52)
    >     Though this was also the same on my 2016 13 model as well.
    >     
    >     I should note that I mainly debug mobile apps. iOS and Android, but I'm currently debugging an OSX app communicating with a mobile app and it is lldb is pegged on 1 CPU. (screenshot added to bug)
    >      
    >     
    >     
    >     
    >     > Sent: Friday, December 06, 2019 at 12:13 PM
    >     > From: "Michael Jackson" <mike.jackson at bluequartz.net>
    >     > To: "Jason H" <jhihn at gmx.com>
    >     > Cc: Qt-creator <qt-creator at qt-project.org>
    >     > Subject: Re: [Qt-creator] LLDB CPU usage 100% on macOS Catalina (10.15)
    >     >
    >     > I have a 2013 MacBook Pro (mid 2013) that I did *not* have this problem at all. 
    >     > 
    >     > What version of Xcode are you running?
    >     > What model of Mac do you have? 
    >     > 
    >     > For me it is a 2019 16" MacBook Pro with Xcode 11.2.1
    >     > 
    >     > --
    >     > Michael Jackson | Owner, President
    >     >       BlueQuartz Software
    >     > [e] mike.jackson at bluequartz.net
    >     > [w] www.bluequartz.net <http://www.bluequartz.net>
    >     > 
    >     > On 12/6/19, 10:35 AM, "Jason H" <jhihn at gmx.com> wrote:
    >     > 
    >     >     I'm on Mojave and that is my experience as well. You can't debug on battery for very long.
    >     >     
    >     >     
    >     >     > Sent: Friday, December 06, 2019 at 9:51 AM
    >     >     > From: "Michael Jackson" <mike.jackson at bluequartz.net>
    >     >     > To: Qt-creator <qt-creator at qt-project.org>
    >     >     > Subject: [Qt-creator] LLDB CPU usage 100% on macOS Catalina (10.15)
    >     >     >
    >     >     > I recently got a new MacBookPro and so was forced to use macOS Catalina. I just finally go around to debugging some code through QtCreator (4.10.1) and while I was debugging the fans were screaming so I popped open activity monitor and noticed that LLDB is spinning full a single CPU core. This is while I am sitting at a breakpoint so the application is doing nothing. 
    >     >     > 
    >     >     > Has anyone else seen this? Is this normal under Catalina (10.15)? I can’t imagine the hit to my battery life if I needed to debug while out of the office.
    >     >     > 
    >     >     > Thanks
    >     >     > --
    >     >     > Michael Jackson | Owner, President
    >     >     >       BlueQuartz Software
    >     >     > [e] mike.jackson at bluequartz.net
    >     >     > [w] www.bluequartz.net <http://www.bluequartz.net>
    >     >     > 
    >     >     > 
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