1 /*
2 * Copyright (c) 2014, 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 CheckSegmentedCodeCache
26 * @bug 8015774
27 * @summary Checks VM options related to the segmented code cache
28 * @library /testlibrary /test/lib
29 * @modules java.base/jdk.internal.misc
30 * java.management
31 *
32 * @build compiler.codecache.CheckSegmentedCodeCache
33 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
34 * sun.hotspot.WhiteBox$WhiteBoxPermission
35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
36 * -XX:+WhiteBoxAPI
37 * compiler.codecache.CheckSegmentedCodeCache
38 */
39
40 package compiler.codecache;
41
42 import jdk.test.lib.OutputAnalyzer;
43 import jdk.test.lib.Platform;
44 import jdk.test.lib.ProcessTools;
45 import sun.hotspot.WhiteBox;
46
47 public class CheckSegmentedCodeCache {
48 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
49 // Code heap names
50 private static final String NON_METHOD = "CodeHeap 'non-nmethods'";
51 private static final String PROFILED = "CodeHeap 'profiled nmethods'";
52 private static final String NON_PROFILED = "CodeHeap 'non-profiled nmethods'";
53
54 private static void verifySegmentedCodeCache(ProcessBuilder pb, boolean enabled) throws Exception {
55 OutputAnalyzer out = new OutputAnalyzer(pb.start());
56 out.shouldHaveExitValue(0);
57 if (enabled) {
58 try {
59 // Non-nmethod code heap should be always available with the segmented code cache
60 out.shouldContain(NON_METHOD);
61 } catch (RuntimeException e) {
62 // Check if TieredCompilation is disabled (in a client VM)
63 if(!out.getOutput().contains("-XX:+TieredCompilation not supported in this VM")) {
64 // Code cache is not segmented
65 throw new RuntimeException("No code cache segmentation.");
66 }
67 }
68 } else {
69 out.shouldNotContain(NON_METHOD);
70 }
71 }
72
73 private static void verifyCodeHeapNotExists(ProcessBuilder pb, String... heapNames) throws Exception {
74 OutputAnalyzer out = new OutputAnalyzer(pb.start());
75 out.shouldHaveExitValue(0);
76 for (String name : heapNames) {
77 out.shouldNotContain(name);
78 }
79 }
80
81 private static void failsWith(ProcessBuilder pb, String message) throws Exception {
82 OutputAnalyzer out = new OutputAnalyzer(pb.start());
83 out.shouldContain(message);
84 out.shouldHaveExitValue(1);
85 }
86
87 /**
88 * Check the result of segmented code cache related VM options.
89 */
90 public static void main(String[] args) throws Exception {
91 ProcessBuilder pb;
92
93 // Disabled with ReservedCodeCacheSize < 240MB
94 pb = ProcessTools.createJavaProcessBuilder("-XX:ReservedCodeCacheSize=239m",
95 "-XX:+PrintCodeCache", "-version");
96 verifySegmentedCodeCache(pb, false);
97
98 // Disabled without TieredCompilation
99 pb = ProcessTools.createJavaProcessBuilder("-XX:-TieredCompilation",
100 "-XX:+PrintCodeCache", "-version");
101 verifySegmentedCodeCache(pb, false);
102
103 // Enabled with TieredCompilation and ReservedCodeCacheSize >= 240MB
104 pb = ProcessTools.createJavaProcessBuilder("-XX:+TieredCompilation",
105 "-XX:ReservedCodeCacheSize=240m",
106 "-XX:+PrintCodeCache", "-version");
107 verifySegmentedCodeCache(pb, true);
108 pb = ProcessTools.createJavaProcessBuilder("-XX:+TieredCompilation",
109 "-XX:ReservedCodeCacheSize=400m",
110 "-XX:+PrintCodeCache", "-version");
111 verifySegmentedCodeCache(pb, true);
112
113 // Always enabled if SegmentedCodeCache is set
114 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
115 "-XX:-TieredCompilation",
116 "-XX:ReservedCodeCacheSize=239m",
117 "-XX:+PrintCodeCache", "-version");
118 verifySegmentedCodeCache(pb, true);
119
120 // The profiled and non-profiled code heaps should not be available in
121 // interpreter-only mode
122 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
123 "-Xint",
124 "-XX:+PrintCodeCache", "-version");
125 verifyCodeHeapNotExists(pb, PROFILED, NON_PROFILED);
126
127 // If we stop compilation at CompLevel_none or CompLevel_simple we
128 // don't need a profiled code heap.
129 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
130 "-XX:TieredStopAtLevel=0",
131 "-XX:+PrintCodeCache", "-version");
132 verifyCodeHeapNotExists(pb, PROFILED);
133 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
134 "-XX:TieredStopAtLevel=1",
135 "-XX:+PrintCodeCache", "-version");
136 verifyCodeHeapNotExists(pb, PROFILED);
137
138 // Fails with too small non-nmethod code heap size
139 pb = ProcessTools.createJavaProcessBuilder("-XX:NonNMethodCodeHeapSize=100K");
140 failsWith(pb, "Invalid NonNMethodCodeHeapSize");
141
142 // Fails if code heap sizes do not add up
143 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
144 "-XX:ReservedCodeCacheSize=10M",
145 "-XX:NonNMethodCodeHeapSize=5M",
146 "-XX:ProfiledCodeHeapSize=5M",
147 "-XX:NonProfiledCodeHeapSize=5M");
148 failsWith(pb, "Invalid code heap sizes");
149
150 // Fails if not enough space for VM internal code
151 long minUseSpace = WHITE_BOX.getUintxVMFlag("CodeCacheMinimumUseSpace");
152 // minimum size: CodeCacheMinimumUseSpace DEBUG_ONLY(* 3)
153 long minSize = (Platform.isDebugBuild() ? 3 : 1) * minUseSpace;
154 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
155 "-XX:ReservedCodeCacheSize=" + minSize,
156 "-XX:InitialCodeCacheSize=100K");
157 failsWith(pb, "Not enough space in non-nmethod code heap to run VM");
158 }
159 }