[lldb-dev] --top-level doesn't work in lldb for Objective-C or Swift :(

[Jim Ingham via lldb-dev]

This isn't an issue with ObjC support in general, but rather shows that ObjC string constants are odd beasts.  You can work around this pretty easily by making dynamic strings:

(lldb) expr --top-level -- NSString *string = [NSString stringWithUTF8String: "This is a string"];
(lldb) expr string
(__NSCFString *) $0 = 0x00000001002001b0 @"This is a string"

Please file a bug about the problem with ObjC constant strings.

Jim


> On Oct 4, 2016, at 3:57 PM, Rex Fenley via lldb-dev <lldb-dev at lists.llvm.org> wrote:
> 
> Hey lldb team!
> 
> I'm trying to use `expr --top-level` from lldb in Xcode but it throws errors like the following:
> 
> (lldb) expression --top-level -- NSString *str = @"This is a string";
> Error [IRForTarget]: Couldn't replace an Objective-C constant string with a dynamic string
> error: cannot import unsupported AST node ObjCStringLiteral
> error: The expression could not be prepared to run in the target
> 
> It seems like top-level only supports raw C code and not Objective-C. Is there an option we can set to support this? Is there somewhere in lldb's source code that could help point us to fixing this?
> 
> Thank you, you guys rule!
> 
> -- 
> Rex Fenley  |  IOS DEVELOPER
> 
> 
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