jdk8-mips64-public/hotspot: test/compiler/6843752/Test.java@dbb05f6d93c4 (annotated)

test/compiler/6843752/Test.java@dbb05f6d93c4 (annotated)

test/compiler/6843752/Test.java

Mon, 28 Jul 2014 15:06:38 -0700

author: fzhinkin
date: Mon, 28 Jul 2014 15:06:38 -0700
changeset 6997: dbb05f6d93c4
parent 1907: c18cbe5936b8
child 6876: 710a3c8b516e
permissions: -rw-r--r--

8051344: JVM crashed in Compile::start() during method parsing w/ UseRTMDeopt turned on
Summary: call rtm_deopt() only if there were no compilation bailouts before.
Reviewed-by: kvn

 /*
  * Copyright (c) 2009, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /*
  * @test
  * @bug 6843752
  * @summary missing code for an anti-dependent Phi in GCM
  * @run main/othervm -Xbatch Test
  */
 public class Test {
     Item list;
     static class Item {
         public Item    next;
         public Item    prev;
         public boolean remove;
         Item(boolean r) { remove = r; }
     }
     private void linkIn(Item item) {
         Item head = list;
         if (head == null) {
             item.next = item;
             item.prev = item;
             list = item;
         } else {
             item.next = head;
             item.prev = head.prev;
             head.prev.next = item;
             head.prev = item;
         }
     }
     private void linkOut(Item item) {
         Item head = list;
         if (item.next == item) {
             list = null;
         } else {
             item.prev.next = item.next;
             item.next.prev = item.prev;
             if (head == item) {
                 list = item.next;
             }
         }
         item.next = null;
         item.prev = null; // this is the null pointer we are seeing
     }
     private void removeItems(int numItems) {
         Item item = list;
         if (item == null) {
             return;
         }
         Item last = item.prev;
         boolean done = false;
         while (!done && numItems > 1) {
             // the original code "done = (item == last);" triggered an infinite loop
             // and was changed slightly in order to produce an exception instead.
             done = (item.next == last.next);
             item = item.next;
             if (item.prev.remove) {
                 linkOut(item.prev);
             }
         }
     }
     public void perform(int numItems) {
         for (int i = 0; i < numItems; i++) {
             linkIn(new Item(i == 0));
         }
         removeItems(numItems);
         list = null;
     }
     static public void main(String[] args) {
         int caseCnt = 0;
         Test bj = new Test();
         try {
             for (; caseCnt < 500000;) {
                 int numItems = (++caseCnt % 2);
                 if ((caseCnt % 64) == 0) {
                     numItems = 5;
                 }
                 bj.perform(numItems);
                 if ((caseCnt % 100000) == 0) {
                     System.out.println("successfully performed " + caseCnt + " cases");
                 }
             }
         } catch (Exception e) {
             System.out.println("ERROR: crashed during case " + caseCnt);
             e.printStackTrace(System.out);
             System.exit(97);
         }
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/compiler/6843752/Test.java@dbb05f6d93c4 (annotated)

test/compiler/6843752/Test.java