commit 9d04a20bde1b1855cefc64aebc1a44e253b1a13b
author Hiroshi Yamauchi <yamauchi@google.com> Fri Jan 31 13:35:49 2014 -0800
committer Hiroshi Yamauchi <yamauchi@google.com> Tue Feb 25 13:56:48 2014 -0800
tree 85b8315677c3d6545ac6c8b27db7cb00b82e68b7
parent 0f8aa6b38f204ccacd3ac12bb844e628cec2215b

(Experimental) Add Brooks pointers.

This feature is disabled by default.

Verified that the Brooks pointers are installed correctly by using the
CMS/SS collectors.

Change-Id: Ia9be9814ab6e29169ac85edc4792ce8c81d552a9

runtime/gc/space/image_space.cc

diff --git a/runtime/gc/space/image_space.cc b/runtime/gc/space/image_space.cc
index 12c5451..76c4d25 100644
--- a/runtime/gc/space/image_space.cc
+++ b/runtime/gc/space/image_space.cc
@@ -133,6 +133,11 @@
     mirror::Object* obj = reinterpret_cast<mirror::Object*>(current);
     CHECK(live_bitmap_->Test(obj));
     CHECK(obj->GetClass() != nullptr) << "Image object at address " << obj << " has null class";
+    if (kUseBrooksPointer) {
+      CHECK(obj->GetBrooksPointer() == obj)
+          << "Bad Brooks pointer: obj=" << reinterpret_cast<void*>(obj)
+          << " brooks_ptr=" << reinterpret_cast<void*>(obj->GetBrooksPointer());
+    }
     current += RoundUp(obj->SizeOf(), kObjectAlignment);
   }
 }

runtime/gc/space/space_test.h

diff --git a/runtime/gc/space/space_test.h b/runtime/gc/space/space_test.h
index 093967e..41077f3 100644
--- a/runtime/gc/space/space_test.h
+++ b/runtime/gc/space/space_test.h
@@ -49,6 +49,9 @@
                                                                                       null_loader);
     EXPECT_TRUE(byte_array_class != nullptr);
     o->SetClass(byte_array_class);
+    if (kUseBrooksPointer) {
+      o->SetBrooksPointer(o.get());
+    }
     mirror::Array* arr = o->AsArray<kVerifyNone>();
     size_t header_size = SizeOfZeroLengthByteArray();
     int32_t length = size - header_size;