[lldb-dev] strange behaviour at lldb cmd line

Greg Clayton gclayton at apple.com
Thu Jun 19 14:20:58 PDT 2014

I usually find it best to debug one LLDB using another and step through the Debugger::HandleProcessEvent() and watch as things come out wrong.

> On Jun 19, 2014, at 2:08 PM, Shawn Best <sbest at blueshiftinc.com> wrote:
> Thanks for the pointers Greg and Ed. Lots to chew on.  I will get back with what I find.
> Shawn.
> On 6/19/2014 12:18 PM, Ed Maste wrote:
>>>> On Jun 19, 2014, at 10:29 AM, Shawn Best <sbest at blueshiftinc.com> wrote:
>>>> Hi All,
>>>> I would like to start contributing to lldb project and help improve it on linux.  I am seeing some strange behaviour that makes lldb appear a little flakey.  Some details of my system:
>>>> - Ubuntu 14.04, 64 bit running inside a VM on windows
>>>> - built from top of top of tree with gcc 4.8.2.  Issue happens either configure/make or cmake/ninja
>>>> - stock lldb-3.4 version shipped with Ubuntu does not exhibit this behaviour
>>>> There are two intermittent issues:  1. When I run a program, I see messages that do not belong (indicating the process was stopped)  2.  There appears to be a race condition sending text to the console where (lldb) prompt will come out of order making it appear there is no command prompt.
>> Hi Shawn,
>> There are also some previous threads on this topic in the archives
>> that could help give you some background.  The discussion was in reply
>> to the r202525 commit message.
>> I described a hacky workaround that works for me in:
>> http://lists.cs.uiuc.edu/pipermail/lldb-commits/Week-of-Mon-20140519/011166.html
>> Can you give it a try?  If it "works" for you that will at least
>> suggest we share the same issue on FreeBSD and Linux.
>> -Ed
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