1 /*
2 * Copyright (c) 2014, 2015, 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 * @summary testing of WB::deoptimizeFrames()
28 * @library /testlibrary /test/lib /
29 * @modules java.base/jdk.internal.misc
30 * java.management
31 * @build compiler.whitebox.DeoptimizeFramesTest
32 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
33 * sun.hotspot.WhiteBox$WhiteBoxPermission
34 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
35 * -XX:+WhiteBoxAPI -Xmixed -XX:-UseCounterDecay
36 * -XX:CompileCommand=compileonly,compiler.whitebox.DeoptimizeFramesTest$TestCaseImpl::method
37 * -XX:+IgnoreUnrecognizedVMOptions -XX:-DeoptimizeRandom -XX:-DeoptimizeALot
38 * compiler.whitebox.DeoptimizeFramesTest true
39 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
40 * -XX:+WhiteBoxAPI -Xmixed -XX:-UseCounterDecay
41 * -XX:CompileCommand=compileonly,compiler.whitebox.DeoptimizeFramesTest$TestCaseImpl::method
42 * -XX:+IgnoreUnrecognizedVMOptions -XX:-DeoptimizeRandom -XX:-DeoptimizeALot
43 * compiler.whitebox.DeoptimizeFramesTest false
44 */
45
46 package compiler.whitebox;
47
48 import jdk.test.lib.Asserts;
49 import sun.hotspot.code.NMethod;
50
51 import java.lang.reflect.Executable;
52 import java.util.concurrent.Callable;
53 import java.util.concurrent.Phaser;
54
55 public class DeoptimizeFramesTest extends CompilerWhiteBoxTest {
56 private final boolean makeNotEntrant;
57 private final Phaser phaser;
58
59 private DeoptimizeFramesTest(boolean makeNotEntrant, Phaser phaser) {
60 super(new TestCaseImpl(phaser));
61 // to prevent inlining of #method
62 WHITE_BOX.testSetDontInlineMethod(method, true);
63 this.makeNotEntrant = makeNotEntrant;
64 this.phaser = phaser;
65 System.out.printf("DeoptimizeFramesTest(makeNotEntrant = %b)%n",
66 makeNotEntrant);
67 }
68
69 public static void main(String[] args) throws Exception {
70 Asserts.assertEQ(args.length, 1,
71 "[TESTBUG] args should contain 1 element");
72 new DeoptimizeFramesTest(Boolean.valueOf(args[0]), new Phaser()).runTest();
73 }
74
75 @Override
76 protected void test() throws Exception {
77 compile();
78 checkCompiled();
79 NMethod nm = NMethod.get(method, testCase.isOsr());
80
81 WHITE_BOX.deoptimizeFrames(makeNotEntrant);
82 // #method should still be compiled, since it didn't have frames on stack
83 checkCompiled();
84 NMethod nm2 = NMethod.get(method, testCase.isOsr());
85 Asserts.assertEQ(nm.compile_id, nm2.compile_id,
86 "should be the same nmethod");
87
88 phaser.register();
89 Thread t = new Thread(() -> compile(1));
90 t.start();
91 // pass 1st phase, #method is on stack
92 int p = phaser.arriveAndAwaitAdvance();
93 WHITE_BOX.deoptimizeFrames(makeNotEntrant);
94 // pass 2nd phase, #method can exit
95 phaser.awaitAdvance(phaser.arriveAndDeregister());
96
97 try {
98 t.join();
99 } catch (InterruptedException e) {
100 throw new Error("method '" + method + "' is still executing", e);
101 }
102
103 // invoke one more time to recompile not entrant if any
104 compile(1);
105
106 nm2 = NMethod.get(method, testCase.isOsr());
107 if (makeNotEntrant) {
108 if (nm2 != null) {
109 Asserts.assertNE(nm.compile_id, nm2.compile_id,
110 String.format("compilation %d can't be available", nm.compile_id));
111 }
112 } else {
113 Asserts.assertEQ(nm.compile_id, nm2.compile_id, "should be the same nmethod");
114 }
115 }
116
117
118 private static class TestCaseImpl implements TestCase {
119 private static final Executable EXECUTABLE;
120 static {
121 try {
122 EXECUTABLE = TestCaseImpl.class.getDeclaredMethod("method");
123 } catch (NoSuchMethodException e) {
124 throw new Error("[TESTBUG] method not found", e);
125 }
126 }
127
128 private final Phaser phaser;
129
130 public TestCaseImpl(Phaser phaser) {
131 this.phaser = phaser;
132 phaser.register();
133 }
134
135 @Override
136 public String name() {
137 return "2phases";
138 }
139
140 @Override
141 public Executable getExecutable() {
142 return EXECUTABLE;
143 }
144
145 @Override
146 public Callable<Integer> getCallable() {
147 return () -> {
148 return method();
149 };
150 }
151
152 @Override
153 public boolean isOsr() {
154 return false;
155 }
156
157 private int method() {
158 phaser.arriveAndAwaitAdvance();
159 phaser.arriveAndAwaitAdvance();
160 return 0;
161 }
162 }
163 }