InvokerGC.java revision 11707:ad7af1afda7a 
1/*
2 * Copyright (c) 2016, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 8067247
27 * @modules java.base/jdk.internal.misc
28 * @library /test/lib
29 *
30 * @run main/bootclasspath/othervm -Xcomp -Xbatch
31 *      -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
32 *      -XX:CompileCommand=compileonly,compiler.jsr292.InvokerGC::test
33 *      compiler.jsr292.InvokerGC
34 */
35
36package compiler.jsr292;
37
38import sun.hotspot.WhiteBox;
39
40import java.lang.invoke.MethodHandle;
41import java.lang.invoke.MethodHandles;
42import java.lang.invoke.MethodType;
43
44public class InvokerGC {
45    static final WhiteBox WB = WhiteBox.getWhiteBox();
46
47    static MethodHandle mh;
48    static {
49        try {
50            mh = MethodHandles.lookup().findStatic(InvokerGC.class, "dummy", MethodType.methodType(void.class));
51        } catch (Exception e) {
52            throw new Error(e);
53        }
54    }
55
56    static void dummy() {}
57
58    static void test() {
59        try {
60            mh.invoke();
61        } catch (Throwable e) {
62            throw new Error(e);
63        }
64    }
65
66    public static void main(String[] args) throws Throwable {
67        mh.invoke(); // Pre-generate an invoker for ()V signature
68
69        test(); // trigger method compilation
70        test();
71
72        WB.fullGC(); // WB.fullGC has always clear softref policy.
73
74        test();
75
76        WB.clearInlineCaches(true); // Preserve static stubs.
77
78        test(); // Trigger call site re-resolution. Invoker LambdaForm should stay the same.
79
80        System.out.println("TEST PASSED");
81    }
82}
83