1 /*
2 * Copyright (c) 2014, 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 DeoptimizeFramesTest
26 * @bug 8028595
27 * @library /testlibrary /../../test/lib
28 * @build DeoptimizeFramesTest
29 * @run main ClassFileInstaller sun.hotspot.WhiteBox
30 * sun.hotspot.WhiteBox$WhiteBoxPermission
31 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
32 * -XX:+WhiteBoxAPI -Xmixed
33 * -XX:CompileCommand=compileonly,DeoptimizeFramesTest$TestCaseImpl::method
34 * -XX:-DeoptimizeRandom -XX:-DeoptimizeALot DeoptimizeFramesTest true
35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
36 * -XX:+WhiteBoxAPI -Xmixed
37 * -XX:CompileCommand=compileonly,DeoptimizeFramesTest$TestCaseImpl::method
38 * -XX:-DeoptimizeRandom -XX:-DeoptimizeALot DeoptimizeFramesTest false
39 * @summary testing of WB::deoptimizeFrames()
40 */
41 import java.lang.reflect.Executable;
42 import java.util.concurrent.Callable;
43 import java.util.concurrent.Phaser;
44
45 import sun.hotspot.code.NMethod;
46 import com.oracle.java.testlibrary.Asserts;
47 import com.oracle.java.testlibrary.InfiniteLoop;
48
49 public class DeoptimizeFramesTest extends CompilerWhiteBoxTest {
50 private final boolean makeNotEntrant;
51 private final Phaser phaser;
52
53 private DeoptimizeFramesTest(boolean makeNotEntrant, Phaser phaser) {
54 super(new TestCaseImpl(phaser));
55 // to prevent inlining of #method
56 WHITE_BOX.testSetDontInlineMethod(method, true);
57 this.makeNotEntrant = makeNotEntrant;
58 this.phaser = phaser;
59 System.out.printf("DeoptimizeFramesTest(makeNotEntrant = %b)%n",
60 makeNotEntrant);
61 }
62
63 public static void main(String[] args) throws Exception {
64 Asserts.assertEQ(args.length, 1,
65 "[TESTBUG] args should contain 1 element");
66 new DeoptimizeFramesTest(Boolean.valueOf(args[0]), new Phaser()).runTest();
67 }
68
69 @Override
70 protected void test() throws Exception {
71 compile();
72 checkCompiled();
73 NMethod nm = NMethod.get(method, testCase.isOsr());
74
75 WHITE_BOX.deoptimizeFrames(makeNotEntrant);
76 // #method should still be compiled, since it didn't have frames on stack
77 checkCompiled();
78 NMethod nm2 = NMethod.get(method, testCase.isOsr());
79 Asserts.assertEQ(nm.compile_id, nm2.compile_id,
80 "should be the same nmethod");
81
82 phaser.register();
83 Thread t = new Thread(() -> compile(1));
84 t.start();
85 // pass 1st phase, #method is on stack
86 int p = phaser.arriveAndAwaitAdvance();
87 WHITE_BOX.deoptimizeFrames(makeNotEntrant);
88 // pass 2nd phase, #method can exit
89 phaser.awaitAdvance(phaser.arriveAndDeregister());
90
91 try {
92 t.join();
93 } catch (InterruptedException e) {
94 throw new Error("method '" + method + "' is still executing", e);
95 }
96
97 // invoke one more time to recompile not entrant if any
98 compile(1);
99
100 nm2 = NMethod.get(method, testCase.isOsr());
101 if (makeNotEntrant) {
102 if (nm2 != null) {
103 Asserts.assertNE(nm.compile_id, nm2.compile_id,
104 String.format("compilation %d can't be available", nm.compile_id));
105 }
106 } else {
107 Asserts.assertEQ(nm.compile_id, nm2.compile_id, "should be the same nmethod");
108 }
109 }
110
111
112 private static class TestCaseImpl implements TestCase {
113 private static final Executable EXECUTABLE;
114 static {
115 try {
116 EXECUTABLE = TestCaseImpl.class.getDeclaredMethod("method");
117 } catch (NoSuchMethodException e) {
118 throw new Error("[TESTBUG] method not found", e);
119 }
120 }
121
122 private final Phaser phaser;
123
124 public TestCaseImpl(Phaser phaser) {
125 this.phaser = phaser;
126 phaser.register();
127 }
128
129 @Override
130 public String name() {
131 return "2phases";
132 }
133
134 @Override
135 public Executable getExecutable() {
136 return EXECUTABLE;
137 }
138
139 @Override
140 public Callable<Integer> getCallable() {
141 return () -> {
142 return method();
143 };
144 }
145
146 @Override
147 public boolean isOsr() {
148 return false;
149 }
150
151 private int method() {
152 phaser.arriveAndAwaitAdvance();
153 phaser.arriveAndAwaitAdvance();
154 return 0;
155 }
156 }
157 }