Load app images

Support in-place patching of the app image based on boot image
location and app oat location. Only loads for art run test so far
since we do not automatically generate app images for app installs.

N5 maps launch time (~200 runs):
Before: 930ms
After: 878.18ms
After + image class table: 864.57ms

TODO:
Oatdump support.
Store class loaders as class roots in image.

Bug: 22858531

Change-Id: I9cbc645645e62ea2ed1ad8e139e91af7d88514c1

1 files changed, 14 insertions, 9 deletions

diff --git a/runtime/mirror/dex_cache-inl.h b/runtime/mirror/dex_cache-inl.h
index 975af61ca8..2ecc9fb1a8 100644
--- a/runtime/mirror/dex_cache-inl.h
+++ b/runtime/mirror/dex_cache-inl.h
@@ -122,18 +122,23 @@ inline void DexCache::SetElementPtrSize(PtrType* ptr_array,
   }
 }
 
-template <VerifyObjectFlags kVerifyFlags, typename Visitor>
+template <bool kVisitNativeRoots,
+          VerifyObjectFlags kVerifyFlags,
+          ReadBarrierOption kReadBarrierOption,
+          typename Visitor>
 inline void DexCache::VisitReferences(mirror::Class* klass, const Visitor& visitor) {
   // Visit instance fields first.
-  VisitInstanceFieldsReferences(klass, visitor);
+  VisitInstanceFieldsReferences<kVerifyFlags, kReadBarrierOption>(klass, visitor);
   // Visit arrays after.
-  GcRoot<mirror::String>* strings = GetStrings();
-  for (size_t i = 0, num_strings = NumStrings(); i != num_strings; ++i) {
-    visitor.VisitRootIfNonNull(strings[i].AddressWithoutBarrier());
-  }
-  GcRoot<mirror::Class>* resolved_types = GetResolvedTypes();
-  for (size_t i = 0, num_types = NumResolvedTypes(); i != num_types; ++i) {
-    visitor.VisitRootIfNonNull(resolved_types[i].AddressWithoutBarrier());
+  if (kVisitNativeRoots) {
+    GcRoot<mirror::String>* strings = GetStrings();
+    for (size_t i = 0, num_strings = NumStrings(); i != num_strings; ++i) {
+      visitor.VisitRootIfNonNull(strings[i].AddressWithoutBarrier());
+    }
+    GcRoot<mirror::Class>* resolved_types = GetResolvedTypes();
+    for (size_t i = 0, num_types = NumResolvedTypes(); i != num_types; ++i) {
+      visitor.VisitRootIfNonNull(resolved_types[i].AddressWithoutBarrier());
+    }
   }
 }