Yeah the const char* definitely should have a value. I am guessing the variable is in scope all right. Does it have a summary if you ask for that? Does the same API call work if you stop directly within LLDB and use the Python API? More context (e.g. a repro case) would also help - or maybe if you can step through the LLDB code and see where we fail. If these are just frame locals I expect the relevant code to be in ValueObject.cpp GetValueAsCString
Sent from the iPhone of Enrico Granata <egranata@🍎.com> > On Apr 6, 2014, at 12:26 PM, Eran Ifrah <[email protected]> wrote: > > One of the local variables was 'const char*' so I would expect it to have a > value and others were of type of 'wxString' > In the UI I expanded all the way to the _M_data which is of type 'wchar_t*' - > and still nothing > > Eran > > > >> On Sun, Apr 6, 2014 at 9:13 PM, Enrico Granata <[email protected]> wrote: >> What is the data type of your variables? >> >> If they are aggregate types (structs, classes, ...) they won't have a value. >> >> Only basic types (int, float, char, ..., you get the idea - and pointers) >> have a value. >> >> For other types, they might have a summary, or they might have children, but >> definitely no value. >> >> Sent from the iPhone of >> Enrico Granata <egranata@🍎.com> >> >>> On Apr 6, 2014, at 7:02 AM, Eran Ifrah <[email protected]> wrote: >>> >>> Hello all, >>> >>> I am at a phase where I want to display the current frame local variables >>> whenever the debugger "stops" >>> I was able to get a list of the selected frame's variables in the following >>> manner: >>> >>> lldb::SBFrame frame = >>> m_target.GetProcess().GetSelectedThread().GetSelectedFrame(); >>> ... >>> lldb::SBValueList args = frame.GetBlock().GetVariables(m_target, true, >>> true, false); >>> for(size_t i=0; i<args.GetSize(); ++i) { >>> lldb::SBValue value = args.GetValueAtIndex(i); >>> if ( value.IsValid() ) { >>> LLDBLocalVariable::Ptr_t var( new LLDBLocalVariable(value) ); >>> locals.push_back( var ); >>> } >>> } >>> >>> Now, LLDBLocalVariable is a thin wrapper class for UI purposes. >>> What it does is basically copies values from lldb::SBValue: >>> >>> LLDBLocalVariable::LLDBLocalVariable(lldb::SBValue value) { >>> SetName( value.GetName() ); >>> SetType( value.GetTypeName() ); >>> SetValue( value.GetValue() ); // always returns null >>> ... // code that handles children of value >>> } >>> >>> value.GetName() and value.GetTypeName() are working as expected (i.e. I get >>> the correct type name and its name) >>> However, I can't get the value as "string". I was naive enough to think >>> that const char* SBValue::GetValue() will do the trick... but this always >>> returns NULL. >>> >>> Any suggestions on what am I doing wrong? an example on how to extract the >>> variable's value in string format will be really appreciated >>> >>> Thanks, >>> >>> P.S. >>> This is Linux 13.10 / 64 bit >>> Self compiled lldb >>> >>> -- >>> Eran Ifrah >>> Author of codelite, a cross platform open source C/C++ IDE: >>> http://www.codelite.org >>> wxCrafter, a wxWidgets RAD: http://wxcrafter.codelite.org >>> _______________________________________________ >>> lldb-dev mailing list >>> [email protected] >>> http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev > > > > -- > Eran Ifrah > Author of codelite, a cross platform open source C/C++ IDE: > http://www.codelite.org > wxCrafter, a wxWidgets RAD: http://wxcrafter.codelite.org
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