diff test/compiler/6885584/Test6885584.java @ 1009:03b336640699

6885584: A particular class structure causes large allocation spike for jit Reviewed-by: kvn
author never
date Wed, 07 Oct 2009 15:38:37 -0700
parents
children c18cbe5936b8
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/6885584/Test6885584.java	Wed Oct 07 15:38:37 2009 -0700
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+/**
+ * @test
+ * @bug 6885584
+ * @summary A particular class structure causes large allocation spike for jit
+ *
+ * @run main/othervm -Xbatch Test6885584
+ */
+
+
+
+public class Test6885584 {
+   static private int i1;
+   static private int i2;
+   static private int i3;
+
+    static int limit = Integer.MAX_VALUE - 8;
+
+   public static void main(String args[]) {
+       // Run long enough to trigger an OSR
+       for(int j = 200000; j != 0; j--) {
+       }
+
+       // This must reference a field
+       i1 = i2;
+
+       // The resource leak is roughly proportional to this initial value
+       for(int k = Integer.MAX_VALUE - 1; k != 0; k--) {
+           // Make sure the body does some work
+           if(i2 > i3)i1 = k;
+           if (k <= limit) break;
+       }
+   }
+
+}