[lldb-dev] run after process stop using python API

[Greg Clayton]

I would really suggest using the async API. To see how to use the actual API to control your target, checkout the following example:

svn cat http://llvm.org/svn/llvm-project/lldb/trunk/examples/python/process_events.py

The example shows how to create a target and then debug it and us the API to wait for process state changed events and allows you to then control the process.

The main problem with your example below is that:

i.HandleCommand('r', res)

"r" can take an arbitrary amount of time. It will return, but your process might be running. It might be stopped. You have no idea what your process is doing. 

Using the API correctly to wait for events will give you much more accurate control over your process, and this is why we made process_events.py.

Greg Clayton

On Jun 26, 2013, at 2:10 PM, "Langmuir, Ben" <ben.langmuir at intel.com> wrote:

> How do I turn off the prompt setting?
> 
> Also, continue isn’t what I want – I really do want to re-run the program from the start.
>  
> Ben
>  
> From: Malea, Daniel 
> Sent: Wednesday, June 26, 2013 5:08 PM
> To: Langmuir, Ben; lldb-dev at cs.uiuc.edu
> Subject: Re: [lldb-dev] run after process stop using python API
>  
> 'run' is a GDB alias for process launch. If a process is already running, the command interpreter may be waiting for confirmation from the user that it's OK to restart the process (unless you turned off the prompt setting beforehand)... You probably want to issue a "continue" command to restart the process.
>  
>  
> Cheers,
> Dan
>  
> From:<Langmuir>, Ben Langmuir <ben.langmuir at intel.com>
> Date: Wednesday, 26 June, 2013 4:57 PM
> To: "lldb-dev at cs.uiuc.edu" <lldb-dev at cs.uiuc.edu>
> Subject: [lldb-dev] run after process stop using python API
>  
> I’m trying to use the ‘run’ command from the python API when my process has stopped at a breakpoint, but it appears to hang.  Script attached.
>  
> i.HandleCommand('b main', res)
> i.HandleCommand('r', res) -> runs to breakpoint correctly
> i.HandleCommand('r', res) -> appears to hang
>  
> This seems like a bug, but I thought I would ask in case the interpreter was waiting for some kind of input I wasn’t providing…  I’m running on Linux, and haven’t had a chance to try OS X yet.
>  
> Ben
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