6908267: Zero fails to unlock synchronized native methods on exception

Reviewed-by: never
Contributed-by: NGary Benson <gbenson@redhat.com>

src/cpu/zero/vm/cppInterpreter_zero.cpp

@@ -245,7 +245,7 @@ void CppInterpreter::native_entry(methodOop method, intptr_t UNUSED, TRAPS) {
     if (handlerAddr == NULL) {
       CALL_VM_NOCHECK(InterpreterRuntime::prepare_native_call(thread, method));
       if (HAS_PENDING_EXCEPTION)
-        goto unwind_and_return;
+        goto unlock_unwind_and_return;
 
       handlerAddr = method->signature_handler();
       assert(handlerAddr != NULL, "eh?");
@@ -254,7 +254,7 @@ void CppInterpreter::native_entry(methodOop method, intptr_t UNUSED, TRAPS) {
       CALL_VM_NOCHECK(handlerAddr =
         InterpreterRuntime::slow_signature_handler(thread, method, NULL,NULL));
       if (HAS_PENDING_EXCEPTION)
-        goto unwind_and_return;
+        goto unlock_unwind_and_return;
     }
     handler = \
       InterpreterRuntime::SignatureHandler::from_handlerAddr(handlerAddr);
@@ -365,10 +365,10 @@ void CppInterpreter::native_entry(methodOop method, intptr_t UNUSED, TRAPS) {
   // Reset handle block
   thread->active_handles()->clear();
 
-  // Unlock if necessary.  It seems totally wrong that this
-  // is skipped in the event of an exception but apparently
-  // the template interpreter does this so we do too.
-  if (monitor && !HAS_PENDING_EXCEPTION) {
+ unlock_unwind_and_return:
+
+  // Unlock if necessary
+  if (monitor) {
     BasicLock *lock = monitor->lock();
     markOop header = lock->displaced_header();
     oop rcvr = monitor->obj();