Fix and optimize verify object.

VerifyObject no longer resides in heap. You can now enable
VerifyObject for non-debug builds. VerifyStack is still slow, so it
is now guarded by its own flag.

Fixed the image writer to not use verification at places where
verification fails due to invalid reads.

Fixed RosAlloc to use SizeOf which doesn't call verify object.

Added a flag paremeter to some of the mirror getters / setters to
be able to selectively disable VerifyObject on certain calls.

Optimized the GC to not verify each object multiple times during
object scanning if verify object is enabled.

Added 3 verification options: verify reads, verify this, and verify
writes so that you can select how much verification you want for
mirror getters and setters.

Removed some useless DCHECKs which would slow debug builds without
providing any benefits.

TODO: RosAlloc verification doesn't currently work with verify
objects.

Bug: 12934910
Bug: 12879358

Change-Id: Ic61033104dfc334543f89b0fc0ad8cd4f4015d69

1 files changed, 7 insertions, 3 deletions

diff --git a/runtime/mirror/class-inl.h b/runtime/mirror/class-inl.h
index cba221d01f..e82c39389d 100644
--- a/runtime/mirror/class-inl.h
+++ b/runtime/mirror/class-inl.h
@@ -85,6 +85,7 @@ inline uint32_t Class::NumDirectMethods() {
   return (GetDirectMethods() != NULL) ? GetDirectMethods()->GetLength() : 0;
 }
 
+template<VerifyObjectFlags kVerifyFlags>
 inline ObjectArray<ArtMethod>* Class::GetVirtualMethods() {
   DCHECK(IsLoaded() || IsErroneous());
   return GetFieldObject<ObjectArray<ArtMethod> >(
@@ -103,8 +104,9 @@ inline uint32_t Class::NumVirtualMethods() {
   return (GetVirtualMethods() != NULL) ? GetVirtualMethods()->GetLength() : 0;
 }
 
+template<VerifyObjectFlags kVerifyFlags>
 inline ArtMethod* Class::GetVirtualMethod(uint32_t i) {
-  DCHECK(IsResolved() || IsErroneous());
+  DCHECK(IsResolved<kVerifyFlags>() || IsErroneous<kVerifyFlags>());
   return GetVirtualMethods()->Get(i);
 }
 
@@ -415,14 +417,16 @@ inline void Class::SetVerifyErrorClass(Class* klass) {
   }
 }
 
+template<VerifyObjectFlags kVerifyFlags>
 inline uint32_t Class::GetAccessFlags() {
   // Check class is loaded or this is java.lang.String that has a
   // circularity issue during loading the names of its members
-  DCHECK(IsLoaded() || IsErroneous() ||
+  DCHECK(IsLoaded<kVerifyFlags>() ||
+         IsErroneous<static_cast<VerifyObjectFlags>(kVerifyFlags & ~kVerifyThis)>() ||
          this == String::GetJavaLangString() ||
          this == ArtField::GetJavaLangReflectArtField() ||
          this == ArtMethod::GetJavaLangReflectArtMethod());
-  return GetField32(OFFSET_OF_OBJECT_MEMBER(Class, access_flags_), false);
+  return GetField32<kVerifyFlags>(OFFSET_OF_OBJECT_MEMBER(Class, access_flags_), false);
 }
 
 inline String* Class::GetName() {