commit c785344b87221f5e4e6473e5b762e4e61fe65dcf
author Mathieu Chartier <mathieuc@google.com> Fri Mar 27 14:35:38 2015 -0700
committer Mathieu Chartier <mathieuc@google.com> Fri Apr 10 12:57:27 2015 -0700
tree cd32ad2c2604596a18926f04d4c313dab255ecfd
parent a29d93b380c9aeb8270e281aefbdd0c77a430d43

Move ArtField to native

Add linear alloc. Moved ArtField to be native object. Changed image
writer to put ArtFields after the mirror section.

Savings:
2MB on low ram devices
4MB on normal devices

Total PSS measurements before (normal N5, 95s after shell start):
Image size: 7729152 bytes
23112 kB: .NonMoving
23212 kB: .NonMoving
22868 kB: .NonMoving
23072 kB: .NonMoving
22836 kB: .NonMoving
19618 kB: .Zygote
19850 kB: .Zygote
19623 kB: .Zygote
19924 kB: .Zygote
19612 kB: .Zygote
Avg: 42745.4 kB

After:
Image size: 7462912 bytes
17440 kB: .NonMoving
16776 kB: .NonMoving
16804 kB: .NonMoving
17812 kB: .NonMoving
16820 kB: .NonMoving
18788 kB: .Zygote
18856 kB: .Zygote
19064 kB: .Zygote
18841 kB: .Zygote
18629 kB: .Zygote
3499 kB: .LinearAlloc
3408 kB: .LinearAlloc
3424 kB: .LinearAlloc
3600 kB: .LinearAlloc
3436 kB: .LinearAlloc
Avg: 39439.4 kB

No reflection performance changes.

Bug: 19264997
Bug: 17643507

Change-Id: I10c73a37913332080aeb978c7c94713bdfe4fe1c

runtime/common_runtime_test.cc

diff --git a/runtime/common_runtime_test.cc b/runtime/common_runtime_test.cc
index d400010..60b7fa2 100644
--- a/runtime/common_runtime_test.cc
+++ b/runtime/common_runtime_test.cc
@@ -398,7 +398,7 @@
 
   ScopedObjectAccess soa(Thread::Current());
 
-  StackHandleScope<4> hs(Thread::Current());
+  StackHandleScope<2> hs(soa.Self());
   Handle<mirror::ClassLoader> class_loader = hs.NewHandle(
       soa.Decode<mirror::ClassLoader*>(jclass_loader));
 
@@ -409,16 +409,13 @@
 
   // The class loader is a PathClassLoader which inherits from BaseDexClassLoader.
   // We need to get the DexPathList and loop through it.
-  Handle<mirror::ArtField> cookie_field =
-      hs.NewHandle(soa.DecodeField(WellKnownClasses::dalvik_system_DexFile_cookie));
-  Handle<mirror::ArtField> dex_file_field =
-      hs.NewHandle(
-          soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList__Element_dexFile));
+  ArtField* cookie_field = soa.DecodeField(WellKnownClasses::dalvik_system_DexFile_cookie);
+  ArtField* dex_file_field =
+      soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList__Element_dexFile);
   mirror::Object* dex_path_list =
       soa.DecodeField(WellKnownClasses::dalvik_system_PathClassLoader_pathList)->
       GetObject(class_loader.Get());
-  if (dex_path_list != nullptr && dex_file_field.Get() != nullptr &&
-      cookie_field.Get() != nullptr) {
+  if (dex_path_list != nullptr && dex_file_field!= nullptr && cookie_field != nullptr) {
     // DexPathList has an array dexElements of Elements[] which each contain a dex file.
     mirror::Object* dex_elements_obj =
         soa.DecodeField(WellKnownClasses::dalvik_system_DexPathList_dexElements)->