1 /*
2 * Copyright (c) 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 import com.oracle.java.testlibrary.*;
25
26 /*
27 * @test CheckSegmentedCodeCache
28 * @bug 8015774
29 * @summary "Checks VM options related to the segmented code cache"
30 * @library /testlibrary
31 * @run main/othervm CheckSegmentedCodeCache
32 */
33 public class CheckSegmentedCodeCache {
34 // Code heap names
35 private static final String NON_METHOD = "CodeHeap 'non-nmethods'";
36 private static final String PROFILED = "CodeHeap 'profiled nmethods'";
37 private static final String NON_PROFILED = "CodeHeap 'non-profiled nmethods'";
38
39 private static void verifySegmentedCodeCache(ProcessBuilder pb, boolean enabled) throws Exception {
40 OutputAnalyzer out = new OutputAnalyzer(pb.start());
41 out.shouldHaveExitValue(0);
42 if (enabled) {
43 try {
44 // Non-nmethod code heap should be always available with the segmented code cache
45 out.shouldContain(NON_METHOD);
46 } catch (RuntimeException e) {
47 // Check if TieredCompilation is disabled (in a client VM)
48 if(!out.getOutput().contains("TieredCompilation is disabled in this release.")) {
49 // Code cache is not segmented
50 throw new RuntimeException("No code cache segmentation.");
51 }
52 }
53 } else {
54 out.shouldNotContain(NON_METHOD);
55 }
56 }
57
58 private static void verifyCodeHeapNotExists(ProcessBuilder pb, String... heapNames) throws Exception {
59 OutputAnalyzer out = new OutputAnalyzer(pb.start());
60 out.shouldHaveExitValue(0);
61 for (String name : heapNames) {
62 out.shouldNotContain(name);
63 }
64 }
65
66 private static void failsWith(ProcessBuilder pb, String message) throws Exception {
67 OutputAnalyzer out = new OutputAnalyzer(pb.start());
68 out.shouldContain(message);
69 out.shouldHaveExitValue(1);
70 }
71
72 /**
73 * Check the result of segmented code cache related VM options.
74 */
75 public static void main(String[] args) throws Exception {
76 ProcessBuilder pb;
77
78 // Disabled with ReservedCodeCacheSize < 240MB
79 pb = ProcessTools.createJavaProcessBuilder("-XX:ReservedCodeCacheSize=239m",
80 "-XX:+PrintCodeCache", "-version");
81 verifySegmentedCodeCache(pb, false);
82
83 // Disabled without TieredCompilation
84 pb = ProcessTools.createJavaProcessBuilder("-XX:-TieredCompilation",
85 "-XX:+PrintCodeCache", "-version");
86 verifySegmentedCodeCache(pb, false);
87
88 // Enabled with TieredCompilation and ReservedCodeCacheSize >= 240MB
89 pb = ProcessTools.createJavaProcessBuilder("-XX:+TieredCompilation",
90 "-XX:ReservedCodeCacheSize=240m",
91 "-XX:+PrintCodeCache", "-version");
92 verifySegmentedCodeCache(pb, true);
93 pb = ProcessTools.createJavaProcessBuilder("-XX:+TieredCompilation",
94 "-XX:ReservedCodeCacheSize=400m",
95 "-XX:+PrintCodeCache", "-version");
96 verifySegmentedCodeCache(pb, true);
97
98 // Always enabled if SegmentedCodeCache is set
99 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
100 "-XX:-TieredCompilation",
101 "-XX:ReservedCodeCacheSize=239m",
102 "-XX:+PrintCodeCache", "-version");
103 verifySegmentedCodeCache(pb, true);
104
105 // The profiled and non-profiled code heaps should not be available in
106 // interpreter-only mode
107 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
108 "-Xint",
109 "-XX:+PrintCodeCache", "-version");
110 verifyCodeHeapNotExists(pb, PROFILED, NON_PROFILED);
111
112 // If we stop compilation at CompLevel_none or CompLevel_simple we
113 // don't need a profiled code heap.
114 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
115 "-XX:TieredStopAtLevel=0",
116 "-XX:+PrintCodeCache", "-version");
117 verifyCodeHeapNotExists(pb, PROFILED);
118 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
119 "-XX:TieredStopAtLevel=1",
120 "-XX:+PrintCodeCache", "-version");
121 verifyCodeHeapNotExists(pb, PROFILED);
122
123 // Fails with too small non-nmethod code heap size
124 pb = ProcessTools.createJavaProcessBuilder("-XX:NonNMethodCodeHeapSize=100K");
125 failsWith(pb, "Invalid NonNMethodCodeHeapSize");
126
127 // Fails if code heap sizes do not add up
128 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
129 "-XX:ReservedCodeCacheSize=10M",
130 "-XX:NonNMethodCodeHeapSize=5M",
131 "-XX:ProfiledCodeHeapSize=5M",
132 "-XX:NonProfiledCodeHeapSize=5M");
133 failsWith(pb, "Invalid code heap sizes");
134
135 // Fails if not enough space for VM internal code
136 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache",
137 "-XX:ReservedCodeCacheSize=1700K",
138 "-XX:InitialCodeCacheSize=100K");
139 failsWith(pb, "Not enough space in non-nmethod code heap to run VM");
140 }
141 }