1 /* 2 * Copyright (c) 2015, 2021, 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 * @build sun.hotspot.WhiteBox 32 * @run driver jdk.test.lib.helpers.ClassFileInstaller sun.hotspot.WhiteBox 33 * @compile test-classes/MultiProcClass.java 34 * @run driver MultiProcessSharing 35 */ 36 37 import java.io.File; 38 import jdk.test.lib.Asserts; 39 import jdk.test.lib.Platform; 40 import jdk.test.lib.process.OutputAnalyzer; 41 import sun.hotspot.WhiteBox; 42 43 44 public class MultiProcessSharing { 45 static String useWbJar; 46 static String sharedClass1Jar; 47 static boolean checkPmap = false; 48 main(String[] args)49 public static void main(String[] args) throws Exception { 50 String wbJar = JarBuilder.build(true, "WhiteBox", "sun/hotspot/WhiteBox"); 51 useWbJar = "-Xbootclasspath/a:" + wbJar; 52 sharedClass1Jar = JarBuilder.build("shared_class1", "MultiProcClass"); 53 54 // create an archive 55 OutputAnalyzer out = TestCommon.dump(sharedClass1Jar, 56 TestCommon.list("MultiProcClass"), useWbJar); 57 TestCommon.checkDump(out); 58 59 // determine whether OK to use pmap for extra test verification 60 long myPid = ProcessHandle.current().pid(); 61 checkPmap = (Platform.isLinux() && (MultiProcClass.runPmap(myPid, false) == 0)); 62 System.out.println("MultiProcessSharing: checkPmap is " + checkPmap); 63 64 // use an archive in several processes concurrently 65 int numProcesses = 3; 66 Thread[] threads = new Thread[numProcesses]; 67 ProcessHandler[] processHandlers = new ProcessHandler[numProcesses]; 68 for (int i = 0; i < numProcesses; i++) { 69 processHandlers[i] = new ProcessHandler(i); 70 threads[i] = new Thread(processHandlers[i]); 71 } 72 73 for (Thread t : threads) { 74 t.start(); 75 } 76 77 for (Thread t : threads) { 78 try { 79 t.join(); 80 } catch (InterruptedException ie) { 81 throw ie; 82 } 83 } 84 85 // check results 86 for (ProcessHandler ph : processHandlers) { 87 TestCommon.checkExec(ph.out); 88 if (checkPmap && !TestCommon.isUnableToMap(ph.out)) { 89 checkPmapOutput(ph.out.getOutput()); 90 } 91 } 92 } 93 94 95 static class ProcessHandler implements Runnable { 96 int processNumber; 97 OutputAnalyzer out; 98 ProcessHandler(int processNumber)99 ProcessHandler(int processNumber) { 100 this.processNumber = processNumber; 101 } 102 103 @Override run()104 public void run() { 105 try { 106 out = TestCommon.exec(sharedClass1Jar, 107 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", useWbJar, 108 "MultiProcClass", "" + processNumber, "" + checkPmap); 109 } catch (Exception e) { 110 throw new RuntimeException("Error occurred when using archive, exec()" + e); 111 } 112 } 113 } 114 115 checkPmapOutput(String stdio)116 private static void checkPmapOutput(String stdio) { 117 System.out.println("Checking pmap output ..."); 118 String[] lines = stdio.split("\n"); 119 120 boolean foundJsa = false; 121 boolean foundReadOnlyJsaSection = false; 122 123 for (String line : lines) { 124 if (line.contains(TestCommon.getCurrentArchiveName())) 125 System.out.println(line); 126 foundJsa = true; 127 if (line.contains("r--")) { 128 foundReadOnlyJsaSection = true; 129 } 130 131 // On certain ARM platforms system maps r/o memory mapped files 132 // as r/x; see JDK-8145694 for details 133 if ( (Platform.isARM() || Platform.isAArch64()) && line.contains("r-x") ) { 134 foundReadOnlyJsaSection = true; 135 } 136 } 137 138 Asserts.assertTrue(foundJsa && foundReadOnlyJsaSection); 139 } 140 141 } 142