src/hotspot/cpu/x86/sharedRuntime_x86_64.cpp

rev 50715 : 8205523: Explicit barriers for interpreter

*** 2367,2376 ****
--- 2367,2377 ----
      __ lea(lock_reg, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size));
  
      // Load the oop from the handle
      __ movptr(obj_reg, Address(oop_handle_reg, 0));
  
+     __ resolve_for_write(OOP_NOT_NULL, obj_reg);
      if (UseBiasedLocking) {
        __ biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, lock_done, &slow_path_lock);
      }
  
      // Load immediate 1 into swap_reg %rax
*** 2534,2543 ****
--- 2535,2545 ----
    Label slow_path_unlock;
    if (method->is_synchronized()) {
  
      // Get locked oop from the handle we passed to jni
      __ movptr(obj_reg, Address(oop_handle_reg, 0));
+     __ resolve_for_write(OOP_NOT_NULL, obj_reg);
  
      Label done;
  
      if (UseBiasedLocking) {
        __ biased_locking_exit(obj_reg, old_hdr, done);