Allow structural redefinition on non-final classes.

This adds support for structurally redefining non-final,
non-finalizable classes. The only restriction is that one cannot
redefine a class at the same time as any of its supertypes, if a
structural redefinition is occurring. The structural redefinition may
not remove any fields or methods, change the superclass or change the
implemented interfaces. Adding new methods or fields, both static or
non-static, public, private, protected, or package-private, is
supported.

Test: ./test.py --host
Bug: 134162467
Bug: 144168550
Change-Id: I32e9e854b3e56270170b10e8f5aba9de8f6bfdfa

1 files changed, 9 insertions, 0 deletions

diff --git a/runtime/mirror/class.cc b/runtime/mirror/class.cc
index 834b8574fc..caa646bbff 100644
--- a/runtime/mirror/class.cc
+++ b/runtime/mirror/class.cc
@@ -336,6 +336,15 @@ void Class::SetClassSize(uint32_t new_class_size) {
   SetField32Transaction(OFFSET_OF_OBJECT_MEMBER(Class, class_size_), new_class_size);
 }
 
+ObjPtr<Class> Class::GetObsoleteClass() {
+  ObjPtr<ClassExt> ext(GetExtData());
+  if (ext.IsNull()) {
+    return nullptr;
+  } else {
+    return ext->GetObsoleteClass();
+  }
+}
+
 // Return the class' name. The exact format is bizarre, but it's the specified behavior for
 // Class.getName: keywords for primitive types, regular "[I" form for primitive arrays (so "int"
 // but "[I"), and arrays of reference types written between "L" and ";" but with dots rather than