--- a/hotspot/src/share/vm/code/nmethod.hpp	Thu Dec 09 17:53:22 2010 +0300
+++ b/hotspot/src/share/vm/code/nmethod.hpp	Thu Dec 09 15:04:26 2010 -0500
@@ -210,7 +210,7 @@
   ExceptionCache *_exception_cache;
   PcDescCache     _pc_desc_cache;
 
-  // These are only used for compiled synchronized native methods to
+  // These are used for compiled synchronized native methods to
   // locate the owner and stack slot for the BasicLock so that we can
   // properly revoke the bias of the owner if necessary. They are
   // needed because there is no debug information for compiled native
@@ -220,8 +220,10 @@
   // sharing between platforms. Note that currently biased locking
   // will never cause Class instances to be biased but this code
   // handles the static synchronized case as well.
-  ByteSize _compiled_synchronized_native_basic_lock_owner_sp_offset;
-  ByteSize _compiled_synchronized_native_basic_lock_sp_offset;
+  // JVMTI's GetLocalInstance() also uses these offsets to find the receiver
+  // for non-static native wrapper frames.
+  ByteSize _native_receiver_sp_offset;
+  ByteSize _native_basic_lock_sp_offset;
 
   friend class nmethodLocker;
 
@@ -676,11 +678,11 @@
   bool is_patchable_at(address instr_address);
 
   // UseBiasedLocking support
-  ByteSize compiled_synchronized_native_basic_lock_owner_sp_offset() {
-    return _compiled_synchronized_native_basic_lock_owner_sp_offset;
+  ByteSize native_receiver_sp_offset() {
+    return _native_receiver_sp_offset;
   }
-  ByteSize compiled_synchronized_native_basic_lock_sp_offset() {
-    return _compiled_synchronized_native_basic_lock_sp_offset;
+  ByteSize native_basic_lock_sp_offset() {
+    return _native_basic_lock_sp_offset;
   }
 
   // support for code generation