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 * @ignore 31 * @run main ClassFileInstaller sun.hotspot.WhiteBox 32 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocRoundingReportTest 33 * 34 */ 35 36 import com.oracle.java.testlibrary.*; 37 38 import sun.hotspot.WhiteBox; 39 40 public class MallocRoundingReportTest { 41 private static long K = 1024; 42 43 public static void main(String args[]) throws Exception { 44 OutputAnalyzer output; 45 WhiteBox wb = WhiteBox.getWhiteBox(); 46 47 // Grab my own PID 48 String pid = Integer.toString(ProcessTools.getProcessId()); 49 ProcessBuilder pb = new ProcessBuilder(); 50 51 long[] additionalBytes = {0, 1, 512, 650}; 52 long[] kByteSize = {1024, 2048}; 53 long mallocd_total = 0; 54 for ( int i = 0; i < kByteSize.length; i++) 55 { 56 for (int j = 0; j < (additionalBytes.length); j++) { 57 long curKB = kByteSize[i] + additionalBytes[j]; 58 // round up/down to the nearest KB to match NMT reporting 59 long numKB = (curKB % kByteSize[i] >= 512) ? ((curKB / K) + 1) : curKB / K; 60 // Use WB API to alloc and free with the mtTest type 61 mallocd_total = wb.NMTMalloc(curKB); 62 // Run 'jcmd <pid> VM.native_memory summary', check for expected output 63 // NMT does not track memory allocations less than 1KB, and rounds to the nearest KB 64 String expectedOut = ("Test (reserved=" + numKB + "KB, committed=" + numKB + "KB)"); 65 66 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" }); 67 output = new OutputAnalyzer(pb.start()); 68 output.shouldContain(expectedOut); 69 70 wb.NMTFree(mallocd_total); 71 // Run 'jcmd <pid> VM.native_memory summary', check for expected output 72 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" }); 73 output = new OutputAnalyzer(pb.start()); 74 output.shouldNotContain("Test (reserved="); 75 } 76 } 77 } 78 }