[Lldb-commits] [PATCH] D74187: [lldb] Add method Language::IsMangledName

[Frederic Riss via Phabricator via lldb-commits]

friss added inline comments.


================
Comment at: lldb/source/Plugins/Language/ObjC/ObjCLanguage.h:96-98
+  bool IsMangledName(llvm::StringRef name) const override {
+    return false;
+  }
----------------
shafik wrote:
> xiaobai wrote:
> > friss wrote:
> > > The original code was calling `IsPossibleObjCMethodName` and it looks like you completely lose this codepath with this rewrite. Unclear to me if it's the right thing to return here, but that's definitely a change in behavior.
> > If I understand correctly, Objective-C names aren't mangled in general, and are usually stored in the `m_demangled` name of `Mangled`, so that code path should have been bogus to begin with. Maybe I'm missing a detail though?
> > 
> > I can add a comment to this to clarify that Objective-C names aren't mangled (if I am correct in my understanding).
> I believe this is true, I have not verified it myself. I believe what happens is that `m_mangled` is just set directly in the Objective-C but it probably would be nice to verify this via a test in `MangledTest.cpp` I actually though @mib had added a test here for Objective-C the other day.
> If I understand correctly, Objective-C names aren't mangled in general, and are usually stored in the m_demangled name of Mangled, so that code path should have been bogus to begin with. Maybe I'm missing a detail though?

I'm just pointing out a change in behavior. If a `Mangled` object had `m_mangled` set to an Obj-C method name, `GuessLanguage()` would have returned `eLanguageTypeObjC` before your patch. It won't do it after. I don't actually know whether we ever put a method name in `m_mangled`, but I bet we do.

Whether Obj-C symbols are actually mangled or not is debatable too. The name of the method symbol tells you whether it is a class or instance method and the number and names of arguments. Looks pretty close to the information the C++ mangling gives you for a symbol.


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  https://reviews.llvm.org/D74187/new/

https://reviews.llvm.org/D74187