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 import jdk.test.lib.*; 25 import sun.hotspot.WhiteBox; 26 27 /* 28 * @test CheckSegmentedCodeCache 29 * @bug 8015774 30 * @library /testlibrary /test/lib 31 * @summary "Checks VM options related to the segmented code cache" 32 * @modules java.base/sun.misc 33 * java.management 34 * @build CheckSegmentedCodeCache 35 * @run main ClassFileInstaller sun.hotspot.WhiteBox 36 * sun.hotspot.WhiteBox$WhiteBoxPermission 37 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI CheckSegmentedCodeCache 38 */ 39 public class CheckSegmentedCodeCache { 40 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); 41 // Code heap names 42 private static final String NON_METHOD = "CodeHeap 'non-nmethods'"; 43 private static final String PROFILED = "CodeHeap 'profiled nmethods'"; 44 private static final String NON_PROFILED = "CodeHeap 'non-profiled nmethods'"; 45 46 private static void verifySegmentedCodeCache(ProcessBuilder pb, boolean enabled) throws Exception { 47 OutputAnalyzer out = new OutputAnalyzer(pb.start()); 48 out.shouldHaveExitValue(0); 49 if (enabled) { 50 try { 51 // Non-nmethod code heap should be always available with the segmented code cache 52 out.shouldContain(NON_METHOD); 53 } catch (RuntimeException e) { 54 // Check if TieredCompilation is disabled (in a client VM) 55 if(!out.getOutput().contains("-XX:+TieredCompilation not supported in this VM")) { 56 // Code cache is not segmented 57 throw new RuntimeException("No code cache segmentation."); 58 } 59 } 60 } else { 61 out.shouldNotContain(NON_METHOD); 62 } 63 } 64 65 private static void verifyCodeHeapNotExists(ProcessBuilder pb, String... heapNames) throws Exception { 66 OutputAnalyzer out = new OutputAnalyzer(pb.start()); 67 out.shouldHaveExitValue(0); 68 for (String name : heapNames) { 69 out.shouldNotContain(name); 70 } 71 } 72 73 private static void failsWith(ProcessBuilder pb, String message) throws Exception { 74 OutputAnalyzer out = new OutputAnalyzer(pb.start()); 75 out.shouldContain(message); 76 out.shouldHaveExitValue(1); 77 } 78 79 /** 80 * Check the result of segmented code cache related VM options. 81 */ 82 public static void main(String[] args) throws Exception { 83 ProcessBuilder pb; 84 85 // Disabled with ReservedCodeCacheSize < 240MB 86 pb = ProcessTools.createJavaProcessBuilder("-XX:ReservedCodeCacheSize=239m", 87 "-XX:+PrintCodeCache", "-version"); 88 verifySegmentedCodeCache(pb, false); 89 90 // Disabled without TieredCompilation 91 pb = ProcessTools.createJavaProcessBuilder("-XX:-TieredCompilation", 92 "-XX:+PrintCodeCache", "-version"); 93 verifySegmentedCodeCache(pb, false); 94 95 // Enabled with TieredCompilation and ReservedCodeCacheSize >= 240MB 96 pb = ProcessTools.createJavaProcessBuilder("-XX:+TieredCompilation", 97 "-XX:ReservedCodeCacheSize=240m", 98 "-XX:+PrintCodeCache", "-version"); 99 verifySegmentedCodeCache(pb, true); 100 pb = ProcessTools.createJavaProcessBuilder("-XX:+TieredCompilation", 101 "-XX:ReservedCodeCacheSize=400m", 102 "-XX:+PrintCodeCache", "-version"); 103 verifySegmentedCodeCache(pb, true); 104 105 // Always enabled if SegmentedCodeCache is set 106 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache", 107 "-XX:-TieredCompilation", 108 "-XX:ReservedCodeCacheSize=239m", 109 "-XX:+PrintCodeCache", "-version"); 110 verifySegmentedCodeCache(pb, true); 111 112 // The profiled and non-profiled code heaps should not be available in 113 // interpreter-only mode 114 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache", 115 "-Xint", 116 "-XX:+PrintCodeCache", "-version"); 117 verifyCodeHeapNotExists(pb, PROFILED, NON_PROFILED); 118 119 // If we stop compilation at CompLevel_none or CompLevel_simple we 120 // don't need a profiled code heap. 121 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache", 122 "-XX:TieredStopAtLevel=0", 123 "-XX:+PrintCodeCache", "-version"); 124 verifyCodeHeapNotExists(pb, PROFILED); 125 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache", 126 "-XX:TieredStopAtLevel=1", 127 "-XX:+PrintCodeCache", "-version"); 128 verifyCodeHeapNotExists(pb, PROFILED); 129 130 // Fails with too small non-nmethod code heap size 131 pb = ProcessTools.createJavaProcessBuilder("-XX:NonNMethodCodeHeapSize=100K"); 132 failsWith(pb, "Invalid NonNMethodCodeHeapSize"); 133 134 // Fails if code heap sizes do not add up 135 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache", 136 "-XX:ReservedCodeCacheSize=10M", 137 "-XX:NonNMethodCodeHeapSize=5M", 138 "-XX:ProfiledCodeHeapSize=5M", 139 "-XX:NonProfiledCodeHeapSize=5M"); 140 failsWith(pb, "Invalid code heap sizes"); 141 142 // Fails if not enough space for VM internal code 143 long minUseSpace = WHITE_BOX.getUintxVMFlag("CodeCacheMinimumUseSpace"); 144 // minimum size: CodeCacheMinimumUseSpace DEBUG_ONLY(* 3) 145 long minSize = (Platform.isDebugBuild() ? 3 : 1) * minUseSpace; 146 pb = ProcessTools.createJavaProcessBuilder("-XX:+SegmentedCodeCache", 147 "-XX:ReservedCodeCacheSize=" + minSize, 148 "-XX:InitialCodeCacheSize=100K"); 149 failsWith(pb, "Not enough space in non-nmethod code heap to run VM"); 150 } 151 }