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 creating allocations of the Test type with various sizes and verifying visibility with jcmd 27 * @key nmt jcmd 28 * @library /testlibrary /testlibrary/whitebox 29 * @build MallocRoundingReportTest 30 * @run main ClassFileInstaller sun.hotspot.WhiteBox 31 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocRoundingReportTest 32 * 33 */ 34 35 import com.oracle.java.testlibrary.*; 36 37 import sun.hotspot.WhiteBox; 38 39 public class MallocRoundingReportTest { 40 private static long K = 1024; 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 long[] additionalBytes = {0, 1, 512, 650}; 51 long[] kByteSize = {1024, 2048}; 52 long mallocd_total = 0; 53 for ( int i = 0; i < kByteSize.length; i++) 54 { 55 for (int j = 0; j < (additionalBytes.length); j++) { 56 long curKB = kByteSize[i] + additionalBytes[j]; 57 // round up/down to the nearest KB to match NMT reporting 58 long numKB = (curKB % kByteSize[i] >= 512) ? ((curKB / K) + 1) : curKB / K; 59 // Use WB API to alloc and free with the mtTest type 60 mallocd_total = wb.NMTMalloc(curKB); 61 // Run 'jcmd <pid> VM.native_memory summary', check for expected output 62 // NMT does not track memory allocations less than 1KB, and rounds to the nearest KB 63 String expectedOut = ("Test (reserved=" + numKB + "KB, committed=" + numKB + "KB)"); 64 65 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" }); 66 output = new OutputAnalyzer(pb.start()); 67 output.shouldContain(expectedOut); 68 69 wb.NMTFree(mallocd_total); 70 // Run 'jcmd <pid> VM.native_memory summary', check for expected output 71 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" }); 72 output = new OutputAnalyzer(pb.start()); 73 output.shouldNotContain("Test (reserved="); 74 } 75 } 76 } 77 }