1 /*
  2  * Copyright (c) 2018, 2025, 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 java.util.ArrayList;

 25 import java.util.List;
 26 

 27 import sun.jvm.hotspot.gc.g1.G1CollectedHeap;
 28 import sun.jvm.hotspot.gc.g1.G1HeapRegion;
 29 import sun.jvm.hotspot.HotSpotAgent;
 30 import sun.jvm.hotspot.runtime.VM;
 31 
 32 import jdk.test.lib.apps.LingeredApp;
 33 import jdk.test.lib.Asserts;
 34 import jdk.test.lib.Platform;
 35 import jdk.test.lib.process.OutputAnalyzer;
 36 import jdk.test.lib.process.ProcessTools;
 37 import jdk.test.lib.SA.SATestUtils;
 38 import jdk.test.lib.Utils;
 39 
 40 /**
 41  * @test

 42  * @library /test/lib
 43  * @requires vm.hasSA
 44  * @requires (os.arch != "riscv64" | !(vm.cpu.features ~= ".*qemu.*"))
 45  * @requires vm.gc.G1
 46  * @modules jdk.hotspot.agent/sun.jvm.hotspot

 47  *          jdk.hotspot.agent/sun.jvm.hotspot.gc.g1
 48  *          jdk.hotspot.agent/sun.jvm.hotspot.memory
 49  *          jdk.hotspot.agent/sun.jvm.hotspot.runtime
 50  * @run driver TestG1HeapRegion
 51  */
 52 
 53 public class TestG1HeapRegion {
 54 
 55     private static LingeredApp theApp = null;
 56 
 57     private static void checkHeapRegion(String pid) throws Exception {
 58         HotSpotAgent agent = new HotSpotAgent();
 59 
 60         try {
 61             agent.attach(Integer.parseInt(pid));

 62             G1CollectedHeap heap = (G1CollectedHeap)VM.getVM().getUniverse().heap();
 63             G1HeapRegion hr = heap.hrm().heapRegionIterator().next();
 64             G1HeapRegion hrTop = heap.hrm().getByAddress(hr.top());









 65 
 66             Asserts.assertEquals(hr.top(), hrTop.top(),
 67                                  "Address of G1HeapRegion does not match.");


















 68         } finally {
 69             agent.detach();
 70         }
 71     }
 72 
 73     private static void createAnotherToAttach(long lingeredAppPid)
 74                                                          throws Exception {
 75         // Start a new process to attach to the lingered app
 76         ProcessBuilder processBuilder = ProcessTools.createLimitedTestJavaProcessBuilder(
 77             "--add-modules=jdk.hotspot.agent",
 78             "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot=ALL-UNNAMED",

 79             "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot.gc.g1=ALL-UNNAMED",
 80             "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot.memory=ALL-UNNAMED",
 81             "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot.runtime=ALL-UNNAMED",
 82             "TestG1HeapRegion",
 83             Long.toString(lingeredAppPid));
 84         SATestUtils.addPrivilegesIfNeeded(processBuilder);
 85         OutputAnalyzer SAOutput = ProcessTools.executeProcess(processBuilder);
 86         SAOutput.shouldHaveExitValue(0);
 87         System.out.println(SAOutput.getOutput());
 88     }
 89 
 90     public static void main (String... args) throws Exception {
 91         SATestUtils.skipIfCannotAttach(); // throws SkippedException if attach not expected to work.
 92         if (args == null || args.length == 0) {
 93             try {
 94                 theApp = new LingeredApp();
 95                 LingeredApp.startApp(theApp, "-XX:+UsePerfData", "-XX:+UseG1GC");
 96                 createAnotherToAttach(theApp.getPid());
 97             } finally {
 98                 LingeredApp.stopApp(theApp);
 99             }
100         } else {
101             checkHeapRegion(args[0]);
102         }
103     }
104 }
--- EOF ---