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