1 /* 2 * Copyright (c) 2015, 2018, 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 /* 26 * @test 27 * @summary Run multiple processes with the same archive, ensure they share 28 * 29 * @requires vm.cds 30 * @library /test/lib 31 * @modules java.base/jdk.internal.misc 32 * java.management 33 * jdk.jartool/sun.tools.jar 34 * @build sun.hotspot.WhiteBox 35 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 36 * @compile test-classes/MultiProcClass.java 37 * @run driver MultiProcessSharing 38 */ 39 40 import java.io.File; 41 import jdk.test.lib.Asserts; 42 import jdk.test.lib.Platform; 43 import jdk.test.lib.process.OutputAnalyzer; 44 import sun.hotspot.WhiteBox; 45 46 47 public class MultiProcessSharing { 48 static String useWbJar; 49 static String sharedClass1Jar; 50 static boolean checkPmap = false; 51 52 public static void main(String[] args) throws Exception { 53 String wbJar = JarBuilder.build(true, "WhiteBox", "sun/hotspot/WhiteBox"); 54 useWbJar = "-Xbootclasspath/a:" + wbJar; 55 sharedClass1Jar = JarBuilder.build("shared_class1", "MultiProcClass"); 56 57 // create an archive 58 OutputAnalyzer out = TestCommon.dump(sharedClass1Jar, 59 TestCommon.list("MultiProcClass"), useWbJar); 60 TestCommon.checkDump(out); 61 62 // determine whether OK to use pmap for extra test verification 63 long myPid = ProcessHandle.current().pid(); 64 checkPmap = (Platform.isLinux() && (MultiProcClass.runPmap(myPid, false) == 0)); 65 System.out.println("MultiProcessSharing: checkPmap is " + checkPmap); 66 67 // use an archive in several processes concurrently 68 int numProcesses = 3; 69 Thread[] threads = new Thread[numProcesses]; 70 ProcessHandler[] processHandlers = new ProcessHandler[numProcesses]; 71 for (int i = 0; i < numProcesses; i++) { 72 processHandlers[i] = new ProcessHandler(i); 73 threads[i] = new Thread(processHandlers[i]); 74 } 75 76 for (Thread t : threads) { 77 t.start(); 78 } 79 80 for (Thread t : threads) { 81 try { 82 t.join(); 83 } catch (InterruptedException ie) { 84 throw ie; 85 } 86 } 87 88 // check results 89 for (ProcessHandler ph : processHandlers) { 90 TestCommon.checkExec(ph.out); 91 if (checkPmap && !TestCommon.isUnableToMap(ph.out)) { 92 checkPmapOutput(ph.out.getOutput()); 93 } 94 } 95 } 96 97 98 static class ProcessHandler implements Runnable { 99 int processNumber; 100 OutputAnalyzer out; 101 102 ProcessHandler(int processNumber) { 103 this.processNumber = processNumber; 104 } 105 106 @Override 107 public void run() { 108 try { 109 out = TestCommon.exec(sharedClass1Jar, 110 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", useWbJar, 111 "MultiProcClass", "" + processNumber, "" + checkPmap); 112 } catch (Exception e) { 113 throw new RuntimeException("Error occurred when using archive, exec()" + e); 114 } 115 } 116 } 117 118 119 private static void checkPmapOutput(String stdio) { 120 System.out.println("Checking pmap output ..."); 121 String[] lines = stdio.split("\n"); 122 123 boolean foundJsa = false; 124 boolean foundReadOnlyJsaSection = false; 125 126 for (String line : lines) { 127 if (line.contains(TestCommon.getCurrentArchiveName())) 128 System.out.println(line); 129 foundJsa = true; 130 if (line.contains("r--")) { 131 foundReadOnlyJsaSection = true; 132 } 133 134 // On certain ARM platforms system maps r/o memory mapped files 135 // as r/x; see JDK-8145694 for details 136 if ( (Platform.isARM() || Platform.isAArch64()) && line.contains("r-x") ) { 137 foundReadOnlyJsaSection = true; 138 } 139 } 140 141 Asserts.assertTrue(foundJsa && foundReadOnlyJsaSection); 142 } 143 144 }