1 /*
2 * Copyright (c) 2013, 2023, 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 the various CPU-specific reservation schemes
27 * @requires vm.bits == 64 & !vm.graal.enabled & vm.debug == true
28 * @requires vm.flagless
29 * @requires (os.family != "windows") & (os.family != "aix")
30 * @library /test/lib
31 * @modules java.base/jdk.internal.misc
32 * java.management
33 * @run driver CompressedCPUSpecificClassSpaceReservation
34 */
35
36 import jdk.test.lib.Platform;
37 import jdk.test.lib.process.OutputAnalyzer;
38 import jdk.test.lib.process.ProcessTools;
39 import jtreg.SkippedException;
40
41 import java.io.IOException;
42
43 public class CompressedCPUSpecificClassSpaceReservation {
44 // Note: windows: On windows, we currently have the issue that os::reserve_memory_aligned relies on
45 // os::attempt_reserve_memory_at because VirtualAlloc cannot be unmapped in parts; this precludes use of
46 // +SimulateFullAddressSpace (VM won't be able to reserve heap). Therefore we exclude the test for windows
47 // for now.
48
49 private static void do_test(boolean CDS) throws IOException {
50 // We start the VM with -XX:+SimulateFullAdressSpace, which means the JVM will go through all motions
51 // of reserving the cds+class space, but never succeed. That means we see every single allocation attempt.
52 // We start with -Xlog options enabled. The expected output goes like this:
53 // [0.017s][debug][os,map] reserve_between (range [0x0000000000000000-0x0000000100000000), size 0x41000000, alignment 0x1000000, randomize: 1)
54 ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(
55 "-Xshare:" + (CDS ? "on" : "off"),
56 "-Xmx128m",
57 "-XX:CompressedClassSpaceSize=128m",
58 "-XX:+UnlockExperimentalVMOptions", "-XX:-UseCompactObjectHeaders",
59 "-Xlog:metaspace*", "-Xlog:metaspace+map=trace", "-Xlog:os+map=trace",
60 "-XX:+SimulateFullAddressSpace", // So that no resevation attempt will succeed
61 "-version");
62 OutputAnalyzer output = new OutputAnalyzer(pb.start());
63
64 final String tryReserveForUnscaled = "reserve_between (range [0x0000000000000000-0x0000000100000000)";
65 final String tryReserveForZeroBased = "reserve_between (range [0x0000000100000000-0x0000000800000000)";
66 final String tryReserveFor16bitMoveIntoQ3 = "reserve_between (range [0x0000000100000000-0x0001000000000000)";
67 if (Platform.isAArch64()) {
68 if (CDS) {
69 output.shouldNotContain(tryReserveForUnscaled);
70 } else {
71 output.shouldContain(tryReserveForUnscaled);
72 }
73 output.shouldContain("Trying to reserve at an EOR-compatible address");
74 output.shouldNotContain(tryReserveForZeroBased);
75 output.shouldContain(tryReserveFor16bitMoveIntoQ3);
76 } else if (Platform.isPPC()) {
77 if (CDS) {
78 output.shouldNotContain(tryReserveForUnscaled);
79 output.shouldNotContain(tryReserveForZeroBased);
80 } else {
81 output.shouldContain(tryReserveForUnscaled);
82 output.shouldContain(tryReserveForZeroBased);
83 }
84 output.shouldContain(tryReserveFor16bitMoveIntoQ3);
85 } else if (Platform.isRISCV64()) {
86 output.shouldContain(tryReserveForUnscaled); // unconditionally
87 if (CDS) {
88 output.shouldNotContain(tryReserveForZeroBased);
89 // bits 32..44
90 output.shouldContain("reserve_between (range [0x0000000100000000-0x0000100000000000)");
91 } else {
92 output.shouldContain(tryReserveForZeroBased);
93 // bits 32..44, but not lower than zero-based limit
94 output.shouldContain("reserve_between (range [0x0000000800000000-0x0000100000000000)");
95 }
96 // bits 44..64
97 output.shouldContain("reserve_between (range [0x0000100000000000-0xffffffffffffffff)");
98 } else if (Platform.isS390x()) {
99 output.shouldContain(tryReserveForUnscaled); // unconditionally
100 if (CDS) {
101 output.shouldNotContain(tryReserveForZeroBased);
102 } else {
103 output.shouldContain(tryReserveForZeroBased);
104 }
105 output.shouldContain(tryReserveFor16bitMoveIntoQ3);
106 } else if (Platform.isX64()) {
107 if (CDS) {
108 output.shouldNotContain(tryReserveForUnscaled);
109 output.shouldNotContain(tryReserveForZeroBased);
110 } else {
111 output.shouldContain(tryReserveForUnscaled);
112 output.shouldContain(tryReserveForZeroBased);
113 }
114 } else {
115 throw new RuntimeException("Unexpected platform");
116 }
117
118 // In all cases we should have managed to map successfully eventually
119 if (CDS) {
120 output.shouldContain("CDS archive(s) mapped at:");
121 } else {
122 output.shouldContain("CDS archive(s) not mapped");
123 }
124 output.shouldContain("Compressed class space mapped at:");
125 }
126
127 public static void main(String[] args) throws Exception {
128 System.out.println("Test with CDS");
129 do_test(true);
130 System.out.println("Test without CDS");
131 do_test(false);
132 }
133 }