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 /* 25 * @test 26 * @summary Test consistency of NMT by leaking a few select allocations of the Test type and then verify visibility with jcmd 27 * @key nmt jcmd 28 * @library /testlibrary /testlibrary/whitebox 29 * @build MallocTestType 30 * @run main/othervm/bootclasspath -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocTestType 31 */ 32 33 import com.oracle.java.testlibrary.*; 34 import sun.hotspot.WhiteBox; 35 36 public class MallocTestType { 37 38 public static void main(String args[]) throws Exception { 39 OutputAnalyzer output; 40 WhiteBox wb = WhiteBox.getWhiteBox(); 41 42 // Grab my own PID 43 String pid = Integer.toString(ProcessTools.getProcessId()); 44 ProcessBuilder pb = new ProcessBuilder(); 45 46 // Use WB API to alloc and free with the mtTest type 47 long memAlloc3 = wb.NMTMalloc(128 * 1024); 48 long memAlloc2 = wb.NMTMalloc(256 * 1024); 49 wb.NMTFree(memAlloc3); 50 long memAlloc1 = wb.NMTMalloc(512 * 1024); 51 wb.NMTFree(memAlloc2); 52 53 // Use WB API to ensure that all data has been merged before we continue 54 if (!wb.NMTWaitForDataMerge()) { 55 throw new Exception("Call to WB API NMTWaitForDataMerge() failed"); 56 } 57 58 // Run 'jcmd <pid> VM.native_memory summary' 59 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"}); 60 output = new OutputAnalyzer(pb.start()); 61 output.shouldContain("Test (reserved=512KB, committed=512KB)"); 62 63 // Free the memory allocated by NMTAllocTest 64 wb.NMTFree(memAlloc1); 65 66 // Use WB API to ensure that all data has been merged before we continue 67 if (!wb.NMTWaitForDataMerge()) { 68 throw new Exception("Call to WB API NMTWaitForDataMerge() failed"); 69 } 70 output = new OutputAnalyzer(pb.start()); 71 output.shouldNotContain("Test (reserved="); 72 } 73 }