1 /* 2 * Copyright (c) 2013, 2015, 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 /../../test/lib 29 * @modules java.base/sun.misc 30 * java.management 31 * @build MallocTestType 32 * @run main ClassFileInstaller sun.hotspot.WhiteBox 33 * sun.hotspot.WhiteBox$WhiteBoxPermission 34 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocTestType 35 */ 36 37 import jdk.test.lib.*; 38 import sun.hotspot.WhiteBox; 39 40 public class MallocTestType { 41 42 public static void main(String args[]) throws Exception { 43 OutputAnalyzer output; 44 WhiteBox wb = WhiteBox.getWhiteBox(); 45 46 // Grab my own PID 47 String pid = Integer.toString(ProcessTools.getProcessId()); 48 ProcessBuilder pb = new ProcessBuilder(); 49 50 // Use WB API to alloc and free with the mtTest type 51 long memAlloc3 = wb.NMTMalloc(128 * 1024); 52 long memAlloc2 = wb.NMTMalloc(256 * 1024); 53 wb.NMTFree(memAlloc3); 54 long memAlloc1 = wb.NMTMalloc(512 * 1024); 55 wb.NMTFree(memAlloc2); 56 57 // Run 'jcmd <pid> VM.native_memory summary' 58 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary"}); 59 output = new OutputAnalyzer(pb.start()); 60 output.shouldContain("Test (reserved=512KB, committed=512KB)"); 61 62 // Free the memory allocated by NMTAllocTest 63 wb.NMTFree(memAlloc1); 64 65 output = new OutputAnalyzer(pb.start()); 66 output.shouldNotContain("Test (reserved="); 67 } 68 }