Add Handle/HandleScope and delete SirtRef.

Delete SirtRef and replaced it with Handle. Handles are value types
which wrap around StackReference*.

Renamed StackIndirectReferenceTable to HandleScope.

Added a scoped handle wrapper which wraps around an Object** and
restores it in its destructor.

Renamed Handle::get -> Get.

Bug: 8473721

Change-Id: Idbfebd4f35af629f0f43931b7c5184b334822c7a

1 files changed, 6 insertions, 5 deletions

diff --git a/runtime/mirror/string.cc b/runtime/mirror/string.cc
index 6a0c225022..ee719b477b 100644
--- a/runtime/mirror/string.cc
+++ b/runtime/mirror/string.cc
@@ -22,7 +22,7 @@
 #include "intern_table.h"
 #include "object-inl.h"
 #include "runtime.h"
-#include "sirt_ref.h"
+#include "handle_scope-inl.h"
 #include "thread.h"
 #include "utf-inl.h"
 
@@ -123,18 +123,19 @@ String* String::AllocFromModifiedUtf8(Thread* self, int32_t utf16_length,
 }
 
 String* String::Alloc(Thread* self, int32_t utf16_length) {
-  SirtRef<CharArray> array(self, CharArray::Alloc(self, utf16_length));
-  if (UNLIKELY(array.get() == nullptr)) {
+  StackHandleScope<1> hs(self);
+  Handle<CharArray> array(hs.NewHandle(CharArray::Alloc(self, utf16_length)));
+  if (UNLIKELY(array.Get() == nullptr)) {
     return nullptr;
   }
   return Alloc(self, array);
 }
 
-String* String::Alloc(Thread* self, const SirtRef<CharArray>& array) {
+String* String::Alloc(Thread* self, const Handle<CharArray>& array) {
   // Hold reference in case AllocObject causes GC.
   String* string = down_cast<String*>(GetJavaLangString()->AllocObject(self));
   if (LIKELY(string != nullptr)) {
-    string->SetArray(array.get());
+    string->SetArray(array.Get());
     string->SetCount(array->GetLength());
   }
   return string;