1 /*
2 * Copyright (c) 2013, 2016, 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
26 * @key regression
27 * @key gc
28 * @bug 8027756
29 * @requires vm.gc.G1
30 * @library /test/lib
31 * @modules java.base/jdk.internal.misc
32 * java.management
33 * @build sun.hotspot.WhiteBox
34 * @run main ClassFileInstaller sun.hotspot.WhiteBox
35 * sun.hotspot.WhiteBox$WhiteBoxPermission
36 * @summary Humongous objects may have references from the code cache
37 * @run main TestHumongousCodeCacheRoots
38 */
39
40 import jdk.test.lib.process.OutputAnalyzer;
41 import jdk.test.lib.process.ProcessTools;
42 import sun.hotspot.WhiteBox;
43
44 import java.util.ArrayList;
45 import java.util.Arrays;
46
47 class TestHumongousCodeCacheRootsHelper {
48
49 static final int n = 1000000;
50 static final int[] AA = new int[n];
51 static final int[] BB = new int[n];
52
53 public static void main(String args[]) throws Exception {
54 // do some work so that the compiler compiles this method, inlining the
55 // reference to the integer array (which is a humonguous object) into
56 // the code cache.
57 for(int i = 0; i < n; i++) {
58 AA[i] = 0;
59 BB[i] = 0;
60 }
61 // trigger a GC that checks that the verification code allows humongous
62 // objects with code cache roots; objects should be all live here.
63 System.gc();
64
65 // deoptimize everyhing: this should make all compiled code zombies.
66 WhiteBox wb = WhiteBox.getWhiteBox();
67 wb.deoptimizeAll();
68
69 // trigger a GC that checks that the verification code allows humongous
70 // objects with code cache roots; objects should be all live here.
71 System.gc();
72
73 // wait a little for the code cache sweeper to try to clean up zombie nmethods
74 // and unregister the code roots.
75 try { Thread.sleep(5000); } catch (InterruptedException ex) { }
76
77 // do some work on the arrays to make sure that they need to be live after the GCs
78 for(int i = 0; i < n; i++) {
79 AA[i] = 1;
80 BB[i] = 10;
81 }
82
83 System.out.println();
84 }
85 }
86
87 public class TestHumongousCodeCacheRoots {
88
89 /**
90 * Executes a class in a new VM process with the given parameters.
91 * @param vmargs Arguments to the VM to run
92 * @param classname Name of the class to run
93 * @param arguments Arguments to the class
94 * @param useTestDotJavaDotOpts Use test.java.opts as part of the VM argument string
95 * @return The OutputAnalyzer with the results for the invocation.
96 */
97 public static OutputAnalyzer runWhiteBoxTest(String[] vmargs, String classname, String[] arguments, boolean useTestDotJavaDotOpts) throws Exception {
98 ArrayList<String> finalargs = new ArrayList<String>();
99
100 String[] whiteboxOpts = new String[] {
101 "-Xbootclasspath/a:.",
102 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
103 "-cp", System.getProperty("java.class.path"),
104 };
105
106 if (useTestDotJavaDotOpts) {
107 // System.getProperty("test.java.opts") is '' if no options is set,
108 // we need to skip such a result
109 String[] externalVMOpts = new String[0];
110 if (System.getProperty("test.java.opts") != null && System.getProperty("test.java.opts").length() != 0) {
111 externalVMOpts = System.getProperty("test.java.opts").split(" ");
112 }
113 finalargs.addAll(Arrays.asList(externalVMOpts));
114 }
115
116 finalargs.addAll(Arrays.asList(vmargs));
117 finalargs.addAll(Arrays.asList(whiteboxOpts));
118 finalargs.add(classname);
119 finalargs.addAll(Arrays.asList(arguments));
120
121 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
122 OutputAnalyzer output = new OutputAnalyzer(pb.start());
123 try {
124 output.shouldHaveExitValue(0);
125 } catch (RuntimeException e) {
126 // It's ok if there is no client vm in the jdk.
127 if (output.firstMatch("Unrecognized option: -client") == null) {
128 throw e;
129 }
130 }
131
132 return output;
133 }
134
135 public static void runTest(String compiler, String[] other) throws Exception {
136 ArrayList<String> joined = new ArrayList<String>();
137 joined.add(compiler);
138 joined.addAll(Arrays.asList(other));
139 runWhiteBoxTest(joined.toArray(new String[0]), TestHumongousCodeCacheRootsHelper.class.getName(),
140 new String[] {}, false);
141 }
142
143 public static void main(String[] args) throws Exception {
144 final String[] baseArguments = new String[] {
145 "-XX:+UseG1GC", "-XX:G1HeapRegionSize=1M", "-Xmx100M", // make sure we get a humongous region
146 "-XX:+UnlockDiagnosticVMOptions",
147 "-XX:InitiatingHeapOccupancyPercent=1", // strong code root marking
148 "-XX:+G1VerifyHeapRegionCodeRoots", "-XX:+VerifyAfterGC", // make sure that verification is run
149 };
150 runTest("-client", baseArguments);
151 runTest("-server", baseArguments);
152 }
153 }
154