Infrastructure for obsolete methods

This adds some of the structures and functions needed to eventually
support obsolete methods. Specifically this adds the code to create
and iterate through the obsolete dex-cache maps of classes and
re-organizes the redefinition code to be more sensible and extensible.

Bug: 32369913
Test: ./test/run-test --host 902
Test: mma -j40 test-art-host

Change-Id: I93d60fa66e7512e8b059cdf42af8a56e93ef4bd7

1 files changed, 11 insertions, 0 deletions

diff --git a/runtime/mirror/array.h b/runtime/mirror/array.h
index 994e9b2616..19d300e1f4 100644
--- a/runtime/mirror/array.h
+++ b/runtime/mirror/array.h
@@ -208,6 +208,17 @@ class PointerArray : public Array {
             typename Visitor>
   void Fixup(mirror::PointerArray* dest, PointerSize pointer_size, const Visitor& visitor)
       REQUIRES_SHARED(Locks::mutator_lock_);
+
+  // Works like memcpy(), except we guarantee not to allow tearing of array values (ie using smaller
+  // than element size copies). Arguments are assumed to be within the bounds of the array and the
+  // arrays non-null. Cannot be called in an active transaction.
+  template<bool kUnchecked = false>
+  void Memcpy(int32_t dst_pos,
+              ObjPtr<PointerArray> src,
+              int32_t src_pos,
+              int32_t count,
+              PointerSize pointer_size)
+      REQUIRES_SHARED(Locks::mutator_lock_);
 };
 
 }  // namespace mirror