1 /* 2 * Copyright (c) 2017, Google 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 package MyPackage; 25 26 /** 27 * @test 28 * @summary Verifies the JVMTI Heap Monitor API 29 * @compile HeapMonitorTest.java 30 * @run main/othervm/native -agentlib:HeapMonitor MyPackage.HeapMonitorTest 31 */ 32 33 import java.io.PrintStream; 34 35 public class HeapMonitorTest { 36 37 static { 38 try { 39 System.loadLibrary("HeapMonitor"); 40 } catch (UnsatisfiedLinkError ule) { 41 System.err.println("Could not load HeapMonitor library"); 42 System.err.println("java.library.path: " 43 + System.getProperty("java.library.path")); 44 throw ule; 45 } 46 } 47 48 native static int check(); 49 50 public static int cnt; 51 public static int g_tmp[]; 52 public int array[]; 53 54 public static int helper() { 55 int sum = 0; 56 // Let us assume that the array is 24 bytes of memory. 57 for (int i = 0; i < 127000 / 6; i++) { 58 int tmp[] = new int[1]; 59 // Force it to be kept. 60 g_tmp = tmp; 61 sum += g_tmp[0]; 62 } 63 return sum; 64 } 65 66 public static void main(String[] args) { 67 int sum = 0; 68 for (int j = 0; j < 1000; j++) { 69 sum += helper(); 70 } 71 System.out.println(sum); 72 73 int status = check(); 74 if (status != 0) { 75 throw new RuntimeException("Non-zero status returned from the agent: " + status); 76 } 77 } 78 }