1 /* 2 * Copyright (c) 2014, 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 * @bug 8054836 27 * @summary Test to verify correctness of malloc tracking 28 * @key nmt jcmd 29 * @library /testlibrary /test/lib 30 * @modules java.base/sun.misc 31 * java.management 32 * @build MallocTrackingVerify 33 * @run main ClassFileInstaller sun.hotspot.WhiteBox 34 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocTrackingVerify 35 * 36 */ 37 38 import java.util.ArrayList; 39 import java.util.Random; 40 41 import jdk.test.lib.*; 42 43 import sun.hotspot.WhiteBox; 44 45 public class MallocTrackingVerify { 46 private static int MAX_ALLOC = 4 * 1024; 47 48 static ArrayList<MallocMemory> mallocd_memory = new ArrayList<MallocMemory>(); 49 static long mallocd_total = 0; 50 public static WhiteBox wb = WhiteBox.getWhiteBox(); 51 52 public static void main(String args[]) throws Exception { 53 OutputAnalyzer output; 54 55 // Grab my own PID 56 String pid = Integer.toString(ProcessTools.getProcessId()); 57 ProcessBuilder pb = new ProcessBuilder(); 58 59 Random random = new Random(); 60 // Allocate small amounts of memory with random pseudo call stack 61 while (mallocd_total < MAX_ALLOC) { 62 int size = random.nextInt(31) + 1; 63 long addr = wb.NMTMallocWithPseudoStack(size, random.nextInt()); 64 if (addr != 0) { 65 MallocMemory mem = new MallocMemory(addr, size); 66 mallocd_memory.add(mem); 67 mallocd_total += size; 68 } else { 69 System.out.println("Out of malloc memory"); 70 break; 71 } 72 } 73 74 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" }); 75 output = new OutputAnalyzer(pb.start()); 76 output.shouldContain("Test (reserved=4KB, committed=4KB)"); 77 78 // Free 79 for (MallocMemory mem : mallocd_memory) { 80 wb.NMTFree(mem.addr()); 81 } 82 83 // Run 'jcmd <pid> VM.native_memory summary', check for expected output 84 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, 85 "VM.native_memory", "summary" }); 86 output = new OutputAnalyzer(pb.start()); 87 output.shouldNotContain("Test (reserved="); 88 } 89 90 static class MallocMemory { 91 private long addr; 92 private int size; 93 94 MallocMemory(long addr, int size) { 95 this.addr = addr; 96 this.size = size; 97 } 98 99 long addr() { 100 return this.addr; 101 } 102 103 int size() { 104 return this.size; 105 } 106 } 107 }