--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.test/src/org/graalvm/compiler/test/SubprocessUtil.java	Thu Nov 15 21:05:47 2018 +0100
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.test/src/org/graalvm/compiler/test/SubprocessUtil.java	Thu Nov 15 09:04:07 2018 -0800
@@ -114,6 +114,13 @@
     }
 
     /**
+     * Detects whether a java agent is attached.
+     */
+    public static boolean isJavaAgentAttached() {
+        return SubprocessUtil.getVMCommandLine().stream().anyMatch(args -> args.startsWith("-javaagent"));
+    }
+
+    /**
      * The details of a subprocess execution.
      */
     public static class Subprocess {