Merge pull request #19 from JDevlieghere/cherrypick/class_rw_t

[lldb] Adjust for the new class_rw_t layout.

Author: hyp

lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCClassDescriptorV2.cpp

@@ -111,6 +111,18 @@ bool ClassDescriptorV2::class_rw_t::Read(Process *process, lldb::addr_t addr) {
   m_firstSubclass = extractor.GetAddress_unchecked(&cursor);
   m_nextSiblingClass = extractor.GetAddress_unchecked(&cursor);
 
+  if (m_ro_ptr & 1) {
+    DataBufferHeap buffer(ptr_size, '\0');
+    process->ReadMemory(m_ro_ptr ^ 1, buffer.GetBytes(), ptr_size, error);
+    if (error.Fail())
+      return false;
+    cursor = 0;
+    DataExtractor extractor(buffer.GetBytes(), ptr_size,
+                            process->GetByteOrder(),
+                            process->GetAddressByteSize());
+    m_ro_ptr = extractor.GetAddress_unchecked(&cursor);
+  }
+
   return true;
 }