1 /*
2 * Copyright (c) 2013, 2014, 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 /testlibrary/whitebox
30 * @build TestHumongousCodeCacheRoots
31 * @requires vm.gc=="G1" | vm.gc=="null"
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
33 * sun.hotspot.WhiteBox$WhiteBoxPermission
34 * @summary Humongous objects may have references from the code cache
35 * @run main TestHumongousCodeCacheRoots
36 */
37
38 import com.oracle.java.testlibrary.*;
39 import sun.hotspot.WhiteBox;
40
41 import java.util.ArrayList;
42 import java.util.Arrays;
43
44 class TestHumongousCodeCacheRootsHelper {
45
46 static final int n = 1000000;
47 static final int[] AA = new int[n];
48 static final int[] BB = new int[n];
49
50 public static void main(String args[]) throws Exception {
51 // do some work so that the compiler compiles this method, inlining the
52 // reference to the integer array (which is a humonguous object) into
53 // the code cache.
54 for(int i = 0; i < n; i++) {
55 AA[i] = 0;
56 BB[i] = 0;
57 }
58 // trigger a GC that checks that the verification code allows humongous
59 // objects with code cache roots; objects should be all live here.
60 System.gc();
61
62 // deoptimize everyhing: this should make all compiled code zombies.
63 WhiteBox wb = WhiteBox.getWhiteBox();
64 wb.deoptimizeAll();
65
66 // trigger a GC that checks that the verification code allows humongous
67 // objects with code cache roots; objects should be all live here.
68 System.gc();
69
70 // wait a little for the code cache sweeper to try to clean up zombie nmethods
71 // and unregister the code roots.
72 try { Thread.sleep(5000); } catch (InterruptedException ex) { }
73
74 // do some work on the arrays to make sure that they need to be live after the GCs
75 for(int i = 0; i < n; i++) {
76 AA[i] = 1;
77 BB[i] = 10;
78 }
79
80 System.out.println();
81 }
82 }
83
84 public class TestHumongousCodeCacheRoots {
85
86 /**
87 * Executes a class in a new VM process with the given parameters.
88 * @param vmargs Arguments to the VM to run
89 * @param classname Name of the class to run
90 * @param arguments Arguments to the class
91 * @param useTestDotJavaDotOpts Use test.java.opts as part of the VM argument string
92 * @return The OutputAnalyzer with the results for the invocation.
93 */
94 public static OutputAnalyzer runWhiteBoxTest(String[] vmargs, String classname, String[] arguments, boolean useTestDotJavaDotOpts) throws Exception {
95 ArrayList<String> finalargs = new ArrayList<String>();
96
97 String[] whiteboxOpts = new String[] {
98 "-Xbootclasspath/a:.",
99 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
100 "-cp", System.getProperty("java.class.path"),
101 };
102
103 if (useTestDotJavaDotOpts) {
104 // System.getProperty("test.java.opts") is '' if no options is set,
105 // we need to skip such a result
106 String[] externalVMOpts = new String[0];
107 if (System.getProperty("test.java.opts") != null && System.getProperty("test.java.opts").length() != 0) {
108 externalVMOpts = System.getProperty("test.java.opts").split(" ");
109 }
110 finalargs.addAll(Arrays.asList(externalVMOpts));
111 }
112
113 finalargs.addAll(Arrays.asList(vmargs));
114 finalargs.addAll(Arrays.asList(whiteboxOpts));
115 finalargs.add(classname);
116 finalargs.addAll(Arrays.asList(arguments));
117
118 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
119 OutputAnalyzer output = new OutputAnalyzer(pb.start());
120 output.shouldHaveExitValue(0);
121
122 return output;
123 }
124
125 public static void runTest(String compiler, String[] other) throws Exception {
126 ArrayList<String> joined = new ArrayList<String>();
127 joined.add(compiler);
128 joined.addAll(Arrays.asList(other));
129 runWhiteBoxTest(joined.toArray(new String[0]), TestHumongousCodeCacheRootsHelper.class.getName(),
130 new String[] {}, false);
131 }
132
133 public static void main(String[] args) throws Exception {
134 final String[] baseArguments = new String[] {
135 "-XX:+UseG1GC", "-XX:G1HeapRegionSize=1M", "-Xmx100M", // make sure we get a humongous region
136 "-XX:+UnlockDiagnosticVMOptions",
137 "-XX:InitiatingHeapOccupancyPercent=1", // strong code root marking
138 "-XX:+G1VerifyHeapRegionCodeRoots", "-XX:+VerifyAfterGC", // make sure that verification is run
139 "-XX:NmethodSweepFraction=1", "-XX:NmethodSweepCheckInterval=1", // make the code cache sweep more predictable
140 };
141 runTest("-client", baseArguments);
142 runTest("-server", baseArguments);
143 }
144 }
145