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