diff -r 3d55863a66ba -r 7e56522cb687 hotspot/src/share/vm/runtime/sharedRuntime.cpp
--- a/hotspot/src/share/vm/runtime/sharedRuntime.cpp	Sat May 02 00:16:29 2015 -0700
+++ b/hotspot/src/share/vm/runtime/sharedRuntime.cpp	Tue May 05 18:57:57 2015 -0700
@@ -1793,7 +1793,9 @@
 
 // Handles the uncommon case in locking, i.e., contention or an inflated lock.
 JRT_BLOCK_ENTRY(void, SharedRuntime::complete_monitor_locking_C(oopDesc* _obj, BasicLock* lock, JavaThread* thread))
-  if (!SafepointSynchronize::is_synchronizing()) {
+  // Disable ObjectSynchronizer::quick_enter() in default config
+  // until JDK-8077392 is resolved.
+  if ((SyncFlags & 256) != 0 && !SafepointSynchronize::is_synchronizing()) {
     // Only try quick_enter() if we're not trying to reach a safepoint
     // so that the calling thread reaches the safepoint more quickly.
     if (ObjectSynchronizer::quick_enter(_obj, thread, lock)) return;