1 /*
2 * Copyright Amazon.com Inc. 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 /*
26 * @test
27 * @summary Ensure the HotCodeCollector detects a very hot method and relocates
28 * it to the HotCodeHeap. Sampling is best effort, so for reliability
29 * we spawn a seperate test process to manage the VM flags.
30 * @requires vm.flagless
31 * @requires vm.compiler2.enabled
32 * @library /test/lib /
33 * @build jdk.test.whitebox.WhiteBox
34 * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
35 * @run driver compiler.hotcode.HotCodeCollectorMoveFunction
36 */
37
38 package compiler.hotcode;
39
40 import java.lang.reflect.Method;
41
42 import jdk.test.lib.Asserts;
43 import jdk.test.lib.process.OutputAnalyzer;
44 import jdk.test.lib.process.ProcessTools;
45 import jdk.test.whitebox.WhiteBox;
46 import jdk.test.whitebox.code.BlobType;
47 import jdk.test.whitebox.code.NMethod;
48
49 public class HotCodeCollectorMoveFunction {
50
51 public static void main(String[] args) throws Exception {
52 ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
53 "-Xbootclasspath/a:.",
54 "-Xbatch",
55 "-XX:-TieredCompilation",
56 "-XX:+SegmentedCodeCache",
57 "-XX:+UnlockExperimentalVMOptions",
58 "-XX:+HotCodeHeap",
59 "-XX:+NMethodRelocation",
60 "-XX:+UnlockDiagnosticVMOptions",
61 "-XX:+WhiteBoxAPI",
62 "-XX:HotCodeIntervalSeconds=0",
63 "-XX:HotCodeCallLevel=0",
64 "-XX:HotCodeSampleSeconds=5",
65 "-XX:HotCodeStablePercent=-1",
66 "-XX:HotCodeSamplePercent=100",
67 "-XX:HotCodeStartupDelaySeconds=0",
68 "-XX:CompileCommand=compileonly," + Runner.class.getName() + "::func",
69 Runner.class.getName()
70 );
71
72 OutputAnalyzer out = new OutputAnalyzer(pb.start());
73 out.shouldHaveExitValue(0);
74 }
75
76 static class Runner {
77 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
78 private static final Method method;
79 private static final int C2_LEVEL = 4;
80 private static final int FUNC_RUN_MILLIS = 60_000;
81
82 static {
83 try {
84 method = Runner.class.getMethod("func");
85 } catch (NoSuchMethodException e) {
86 throw new RuntimeException(e);
87 }
88 }
89
90 public static void main(String[] args) {
91 WHITE_BOX.testSetDontInlineMethod(method, true);
92
93 compileFunc();
94
95 // Call function so collector samples and relocates
96 func();
97
98 // Function should now be in the Hot code heap after collector has had time to relocate
99 NMethod relocatedNMethod = NMethod.get(method, false);
100 Asserts.assertNotNull(relocatedNMethod);
101 Asserts.assertEQ(BlobType.MethodHot, relocatedNMethod.code_blob_type);
102 }
103
104 private static void compileFunc() {
105 WHITE_BOX.enqueueMethodForCompilation(method, C2_LEVEL);
106
107 if (WHITE_BOX.getMethodCompilationLevel(method) != C2_LEVEL) {
108 throw new IllegalStateException("Method " + method + " is not compiled by C2.");
109 }
110 }
111
112 public static void func() {
113 long start = System.currentTimeMillis();
114 while (System.currentTimeMillis() - start < FUNC_RUN_MILLIS) {}
115 }
116 }
117 }