1 /*
2 * Copyright (c) 2015, 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 * @summary Test commits of overlapping regions of memory.
27 * @key nmt jcmd
28 * @library /testlibrary /test/lib
29 * @modules java.base/jdk.internal.misc
30 * java.management
31 * @build CommitOverlappingRegions
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
33 * sun.hotspot.WhiteBox$WhiteBoxPermission
34 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail CommitOverlappingRegions
35 */
36
37 import jdk.test.lib.*;
38 import sun.hotspot.WhiteBox;
39
40 public class CommitOverlappingRegions {
41 public static WhiteBox wb = WhiteBox.getWhiteBox();
42 public static void main(String args[]) throws Exception {
43 OutputAnalyzer output;
44
45 long size = 32 * 1024;
46 int pagesize = wb.getVMPageSize();
47 if (size < pagesize) { size = pagesize; } // Should be aligned.
48 long sizek = size / 1024;
49
50 long addr = wb.NMTReserveMemory(8*size);
51
52 String pid = Long.toString(ProcessTools.getProcessId());
53 ProcessBuilder pb = new ProcessBuilder();
54
55 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail"});
56 System.out.println("Address is " + Long.toHexString(addr));
57
58 // Start: . . . . . . . .
59 output = new OutputAnalyzer(pb.start());
60 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)");
61
62 // Committing: * * * . . . . .
63 // Region: * * * . . . . .
64 // Expected Total: 3 x sizek KB
65 wb.NMTCommitMemory(addr + 0*size, 3*size);
66
67 // Committing: . . . . * * * .
68 // Region: * * * . * * * .
69 // Expected Total: 6 x sizek KB
70 wb.NMTCommitMemory(addr + 4*size, 3*size);
71
72 // Check output after first 2 commits.
73 output = new OutputAnalyzer(pb.start());
74 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 6*sizek + "KB)");
75
76 // Committing: . . * * * . . .
77 // Region: * * * * * * * .
78 // Expected Total: 7 x sizek KB
79 wb.NMTCommitMemory(addr + 2*size, 3*size);
80
81 // Check output after overlapping commit.
82 output = new OutputAnalyzer(pb.start());
83 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 7*sizek + "KB)");
84
85 // Uncommitting: * * * * * * * *
86 // Region: . . . . . . . .
87 // Expected Total: 0 x sizek KB
88 wb.NMTUncommitMemory(addr + 0*size, 8*size);
89 output = new OutputAnalyzer(pb.start());
90 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)");
91
92 // Committing: * * . . . . . .
93 // Region: * * . . . . . .
94 // Expected Total: 2 x sizek KB
95 wb.NMTCommitMemory(addr + 0*size, 2*size);
96 output = new OutputAnalyzer(pb.start());
97 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 2*sizek + "KB)");
98
99 // Committing: . * * * . . . .
100 // Region: * * * * . . . .
101 // Expected Total: 4 x sizek KB
102 wb.NMTCommitMemory(addr + 1*size, 3*size);
103 output = new OutputAnalyzer(pb.start());
104 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 4*sizek + "KB)");
105
106 // Uncommitting: * * * . . . . .
107 // Region: . . . * . . . .
108 // Expected Total: 1 x sizek KB
109 wb.NMTUncommitMemory(addr + 0*size, 3*size);
110 output = new OutputAnalyzer(pb.start());
111 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 1*sizek + "KB)");
112
113 // Committing: . . . * * . . .
114 // Region: . . . * * . . .
115 // Expected Total: 2 x sizek KB
116 wb.NMTCommitMemory(addr + 3*size, 2*size);
117 System.out.println("Address is " + Long.toHexString(addr + 3*size));
118 output = new OutputAnalyzer(pb.start());
119 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 2*sizek + "KB)");
120
121 // Committing: . . . . * * . .
122 // Region: . . . * * * . .
123 // Expected Total: 3 x sizek KB
124 wb.NMTCommitMemory(addr + 4*size, 2*size);
125 output = new OutputAnalyzer(pb.start());
126 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 3*sizek + "KB)");
127
128 // Committing: . . . . . * * .
129 // Region: . . . * * * * .
130 // Expected Total: 4 x sizek KB
131 wb.NMTCommitMemory(addr + 5*size, 2*size);
132 output = new OutputAnalyzer(pb.start());
133 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 4*sizek + "KB)");
134
135 // Committing: . . . . . . * *
136 // Region: . . . * * * * *
137 // Expected Total: 5 x sizek KB
138 wb.NMTCommitMemory(addr + 6*size, 2*size);
139 output = new OutputAnalyzer(pb.start());
140 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 5*sizek + "KB)");
141
142 // Uncommitting: * * * * * * * *
143 // Region: . . . . . . . .
144 // Expected Total: 0 x sizek KB
145 wb.NMTUncommitMemory(addr + 0*size, 8*size);
146 output = new OutputAnalyzer(pb.start());
147 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)");
148 }
149 }