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