src/hotspot/share/interpreter/interpreterRuntime.cpp

*** 733,11 ***
  // be shared by method invocation and synchronized blocks.
  //%note synchronization_3
  
  //%note monitor_1
  JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* current, BasicObjectLock* elem))
-   assert(LockingMode != LM_LIGHTWEIGHT, "Should call monitorenter_obj() when using the new lightweight locking");
  #ifdef ASSERT
    current->last_frame().interpreter_frame_verify_monitor(elem);
  #endif
    Handle h_obj(current, elem->obj());
    assert(Universe::heap()->is_in_or_null(h_obj()),
--- 733,10 ---

*** 748,27 ***
  #ifdef ASSERT
    current->last_frame().interpreter_frame_verify_monitor(elem);
  #endif
  JRT_END
  
- // NOTE: We provide a separate implementation for the new lightweight locking to workaround a limitation
- // of registers in x86_32. This entry point accepts an oop instead of a BasicObjectLock*.
- // The problem is that we would need to preserve the register that holds the BasicObjectLock,
- // but we are using that register to hold the thread. We don't have enough registers to
- // also keep the BasicObjectLock, but we don't really need it anyway, we only need
- // the object. See also InterpreterMacroAssembler::lock_object().
- // As soon as legacy stack-locking goes away we could remove the other monitorenter() entry
- // point, and only use oop-accepting entries (same for monitorexit() below).
- JRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter_obj(JavaThread* current, oopDesc* obj))
-   assert(LockingMode == LM_LIGHTWEIGHT, "Should call monitorenter() when not using the new lightweight locking");
-   Handle h_obj(current, cast_to_oop(obj));
-   assert(Universe::heap()->is_in_or_null(h_obj()),
-          "must be null or an object");
-   ObjectSynchronizer::enter(h_obj, nullptr, current);
-   return;
- JRT_END
- 
  JRT_LEAF(void, InterpreterRuntime::monitorexit(BasicObjectLock* elem))
    oop obj = elem->obj();
    assert(Universe::heap()->is_in(obj), "must be an object");
    // The object could become unlocked through a JNI call, which we have no other checks for.
    // Give a fatal message if CheckJNICalls. Otherwise we ignore it.
--- 747,10 ---