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 * @ignore This test is too shaky to run it automatically (see 8151796)
30 * @build sun.hotspot.WhiteBox
31 * compiler.testlibrary.CompilerUtils
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
33 * sun.hotspot.WhiteBox$WhiteBoxPermission
34 *
35 * @run main/othervm
36 * -Xbootclasspath/a:.
37 * -Xmixed
38 * -XX:+UnlockDiagnosticVMOptions
39 * -XX:+WhiteBoxAPI
40 * -XX:+PrintCompilation
41 * -XX:CompileCommand=option,BlockingCompilation::foo,PrintInlining
42 * BlockingCompilation
43 */
44
45 import java.lang.reflect.Method;
46 import java.util.Random;
47
48 import sun.hotspot.WhiteBox;
49 import compiler.testlibrary.CompilerUtils;
50
51 public class BlockingCompilation {
52 private static final WhiteBox WB = WhiteBox.getWhiteBox();
53 private static final Random RANDOM = new Random();
54
55 public static int foo() {
56 return RANDOM.nextInt();
57 }
58
59 public static void main(String[] args) throws Exception {
60 long sum = 0;
61 int level = 0;
62 boolean enqued = false;
63 Method m = BlockingCompilation.class.getMethod("foo");
64 int[] levels = CompilerUtils.getAvailableCompilationLevels();
65
66 // If there are no compilers available these tests don't make any sense.
67 if (levels.length == 0) return;
68 int max_level = levels[levels.length - 1];
69
70 // Normal, non-blocking compilation
71 for (int i = 0; i < 500_000; i++) {
72 sum += foo();
73 if (!enqued && WB.isMethodQueuedForCompilation(m)) {
74 System.out.println("==> " + m + " enqued for compilation in iteration " + i);
75 enqued = true;
76 }
77 if (WB.isMethodCompiled(m)) {
78 if (WB.getMethodCompilationLevel(m) != level) {
79 level = WB.getMethodCompilationLevel(m);
80 System.out.println("==> " + m + " compiled at level " + level + " in iteration " + i);
81 enqued = false;
82 if (level == max_level) break;
83 }
84 }
85 }
86
87 // This is necessarry because WB.deoptimizeMethod doesn't clear the methods
88 // MDO and therefore level 3 compilations will be downgraded to level 2.
89 WB.clearMethodState(m);
90
91 // Blocking compilations on all levels, using the default versions of
92 // WB.enqueueMethodForCompilation() and manually setting compiler directives.
93 String directive = "[{ match: \"BlockingCompilation.foo\", BackgroundCompilation: false }]";
94 WB.addCompilerDirective(directive);
95
96 for (int l : levels) {
97 WB.deoptimizeMethod(m);
98 WB.enqueueMethodForCompilation(m, l);
99
100 if (!WB.isMethodCompiled(m) || WB.getMethodCompilationLevel(m) != l) {
101 String msg = m + " should be compiled at level " + l +
102 "(but is actually compiled at level " +
103 WB.getMethodCompilationLevel(m) + ")";
104 System.out.println("==> " + msg);
105 throw new Exception(msg);
106 }
107 }
108
109 WB.removeCompilerDirective(1);
110
111 WB.deoptimizeMethod(m);
112 WB.clearMethodState(m);
113 level = 0;
114 enqued = false;
115 int iteration = 0;
116
117 // Normal, non-blocking compilation
118 for (int i = 0; i < 500_000; i++) {
119 sum += foo();
120 if (!enqued && WB.isMethodQueuedForCompilation(m)) {
121 System.out.println("==> " + m + " enqued for compilation in iteration " + i);
122 iteration = i;
123 enqued = true;
124 }
125 if (WB.isMethodCompiled(m)) {
126 if (WB.getMethodCompilationLevel(m) != level) {
127 level = WB.getMethodCompilationLevel(m);
128 System.out.println("==> " + m + " compiled at level " + level + " in iteration " + i);
129 if (level == 4 && iteration == i) {
130 throw new Exception("This seems to be a blocking compilation although it shouldn't.");
131 }
132 enqued = false;
133 if (level == max_level) break;
134 }
135 }
136 }
137 }
138 }