[lldb-dev] Is RequestReturnValue still relevant

[Jim Ingham]

That comment is outdated.  I don't remember what it was there for originally, svn says it is Greg's.  Maybe he remembers.

Anyway, you shouldn't need to do anything special to get the return value object out of a ThreadPlanCallFunction, just set up the arguments, run the plan (with RunThreadPlan) and then call GetReturnValueObject on the thread plan (provided it succeeds of course...)  

ThreadPlanCallUserExpression is more complex, but that's really only used with ClangUserExpression at present, if you are trying to get something in the target process using a function call on the lldb_private side of things you should use ClangFunctions, or use ThreadPlanCallFunction & RunThreadPlan.

What are you trying to do?

Jim


> On Jun 18, 2015, at 10:44 PM, Keno Fischer <kfischer at college.harvard.edu> wrote:
> 
> In ThreadPlanCallFunction.h I saw
> 
>    67      // To get the return value from a function call you must create a 
>    68      // lldb::ValueSP that contains a valid clang type in its context and call
>    69:     // RequestReturnValue. The ValueSP will be stored and when the function is
>    70      // done executing, the object will check if there is a requested return 
>    71      // value. If there is, the return value will be retrieved using the 
> 
> I suspect this comment is just outdated, but is there anything special that needs to be done in order to be able to get the return value?
> 
> Keno
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