1 /*
2 * Copyright (c) 2016 SAP SE. 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 8150646
27 * @summary Add support for blocking compiles through whitebox API
28 * @library /testlibrary /test/lib
29 * @build sun.hotspot.WhiteBox
30 * @run main ClassFileInstaller sun.hotspot.WhiteBox
31 * sun.hotspot.WhiteBox$WhiteBoxPermission
32 *
33 * @run main/othervm
34 * -Xbootclasspath/a:.
35 * -Xmixed
36 * -XX:+UnlockDiagnosticVMOptions
37 * -XX:+WhiteBoxAPI
38 * -XX:+PrintCompilation
39 * -XX:CompileCommand=option,BlockingCompilation::foo,PrintInlining
40 * BlockingCompilation
41 */
42
43 import java.lang.reflect.Method;
44 import java.util.Random;
45
46 import sun.hotspot.WhiteBox;
47
48 public class BlockingCompilation {
49 private static final WhiteBox WB = WhiteBox.getWhiteBox();
50 private static final Random RANDOM = new Random();
51
52 public static int foo() {
53 return RANDOM.nextInt();
54 }
55
56 public static void main(String[] args) throws Exception {
57 long sum = 0;
58 int level = 0;
59 boolean enqued = false;
60 Method m = BlockingCompilation.class.getMethod("foo");
61
62 // Normal, non-blocking compilation
63 for (int i = 0; i < 500_000; i++) {
64 sum += foo();
65 if (!enqued && WB.isMethodQueuedForCompilation(m)) {
66 System.out.println("==> " + m + " enqued for compilation in iteration " + i);
67 enqued = true;
68 }
69 if (WB.isMethodCompiled(m)) {
70 if (WB.getMethodCompilationLevel(m) != level) {
71 level = WB.getMethodCompilationLevel(m);
72 System.out.println("==> " + m + " compiled at level " + level + " in iteration " + i);
73 enqued = false;
74 if (level == 4) break;
75 }
76 }
77 }
78
79 // This is necessarry because WB.deoptimizeMethod doesn't clear the methods
80 // MDO and therefore level 3 compilations will be downgraded to level 2.
81 WB.clearMethodState(m);
82
83 // Blocking compilations on all levels, using the
84 // blocking versions of WB.enqueueMethodForCompilation()
85 for (level = 1; level <= 4; level++) {
86 WB.deoptimizeMethod(m);
87 WB.enqueueMethodForCompilation(m, level, true);
88
89 if (!WB.isMethodCompiled(m) || WB.getMethodCompilationLevel(m) != level) {
90 String msg = m + " should be compiled at level " + level +
91 "(but is actually compiled at level " +
92 WB.getMethodCompilationLevel(m) + ")";
93 System.out.println("==> " + msg);
94 throw new Exception(msg);
95 }
96 }
97
98 WB.deoptimizeMethod(m);
99 WB.clearMethodState(m);
100
101 // Blocking compilations on all levels, using the default versions of
102 // WB.enqueueMethodForCompilation() and manually setting compiler directives.
103 String directive = "[{ match: \"BlockingCompilation.foo\", BackgroundCompilation: false }]";
104 WB.addCompilerDirective(directive);
105
106 for (level = 1; level <= 4; level++) {
107 WB.deoptimizeMethod(m);
108 WB.enqueueMethodForCompilation(m, level);
109
110 if (!WB.isMethodCompiled(m) || WB.getMethodCompilationLevel(m) != level) {
111 String msg = m + " should be compiled at level " + level +
112 "(but is actually compiled at level " +
113 WB.getMethodCompilationLevel(m) + ")";
114 System.out.println("==> " + msg);
115 throw new Exception(msg);
116 }
117 }
118
119 WB.removeCompilerDirective(1);
120
121 WB.deoptimizeMethod(m);
122 WB.clearMethodState(m);
123 level = 0;
124 enqued = false;
125 int iteration = 0;
126
127 // Normal, non-blocking compilation
128 for (int i = 0; i < 500_000; i++) {
129 sum += foo();
130 if (!enqued && WB.isMethodQueuedForCompilation(m)) {
131 System.out.println("==> " + m + " enqued for compilation in iteration " + i);
132 iteration = i;
133 enqued = true;
134 }
135 if (WB.isMethodCompiled(m)) {
136 if (WB.getMethodCompilationLevel(m) != level) {
137 level = WB.getMethodCompilationLevel(m);
138 System.out.println("==> " + m + " compiled at level " + level + " in iteration " + i);
139 if (level == 4 && iteration == i) {
140 throw new Exception("This seems to be a blocking compilation although it shouldn't.");
141 }
142 enqued = false;
143 if (level == 4) break;
144 }
145 }
146 }
147 }
148 }