From 56c2d62e5e040c692e976dfd9ed9c7c03be98b02 Mon Sep 17 00:00:00 2001
From: Christian Tornqvist <ctornqvi@openjdk.org>
Date: Wed, 12 Feb 2014 20:40:02 +0100
Subject: [PATCH] 8034781: [TESTBUG]
 runtime/ClassFileUnsupportedClassFileVersion.java unable to find or load main
 class

Passed empty string to ProcessBuilder which caused problems on Linux, fixed by checking string length

Reviewed-by: lfoltan, sla, mseledtsov
---
 .../testlibrary/com/oracle/java/testlibrary/ProcessTools.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hotspot/test/testlibrary/com/oracle/java/testlibrary/ProcessTools.java b/hotspot/test/testlibrary/com/oracle/java/testlibrary/ProcessTools.java
index 4bc11f8bf5d..04293905824 100644
--- a/hotspot/test/testlibrary/com/oracle/java/testlibrary/ProcessTools.java
+++ b/hotspot/test/testlibrary/com/oracle/java/testlibrary/ProcessTools.java
@@ -154,7 +154,7 @@ public final class ProcessTools {
 
     if (addTestVmOptions) {
       String vmopts = System.getProperty("test.vm.opts");
-      if (vmopts != null) {
+      if (vmopts != null && vmopts.length() > 0) {
         Collections.addAll(args, vmopts.split("\\s"));
       }
     }