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comparison test/compiler/6910618/Test.java @ 1253:f70b0d9ab095

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6910618: C2: Error: assert(d->is_oop(),"JVM_ArrayCopy: dst not an oop") Summary: Mark in PcDesc call sites which return oop and save the result oop across objects reallocation during deoptimization. Reviewed-by: never
author kvn
date Tue, 09 Feb 2010 01:31:13 -0800
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children c18cbe5936b8
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1252:f516d5d7a019 1253:f70b0d9ab095
1 /*
2 * Copyright 2010 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 /**
26 * @test
27 * @bug 6910605
28 * @summary C2: NullPointerException/ClassCaseException is thrown when C2 with DeoptimizeALot is used
29 *
30 * @run main/othervm -Xmx64m -XX:+IgnoreUnrecognizedVMOptions -XX:+DeoptimizeALot -XX:+DoEscapeAnalysis -Xbatch -XX:InlineSmallCode=2000 Test
31 *
32 */
33
34 /*
35 * Added InlineSmallCode=2000 to guaranty inlining of StringBuilder::append() to allow scalar replace StringBuilder object.
36 *
37 * original test: gc/gctests/StringGC
38 */
39
40 public class Test {
41 private final String toAdd = "0123456789abcdef";
42 private int maxLength;
43 private static final int numberOfThreads = 8;
44
45 private class StringAdder extends Thread {
46 private String s;
47
48 public void test() {
49 s = s + toAdd;
50 }
51 public void run() {
52 do {
53 test();
54 } while (s.length() < maxLength);
55 }
56 }
57
58 public void test() throws InterruptedException {
59 maxLength = toAdd.length() * 15000/ numberOfThreads;
60 StringAdder[] sa = new StringAdder[numberOfThreads];
61 for (int i = 0; i < numberOfThreads; i++) {
62 sa[i] = new StringAdder();
63 sa[i].start();
64 }
65 for (int i = 0; i < numberOfThreads; i++) {
66 sa[i].join();
67 }
68 }
69
70 public static void main(String[] args) throws InterruptedException {
71 Test t = new Test();
72 t.test();
73 }
74 }