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 * @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 /test/lib 29 * @modules java.base/jdk.internal.misc 30 * java.management 31 * @build sun.hotspot.WhiteBox 32 * @run main ClassFileInstaller sun.hotspot.WhiteBox 33 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocRoundingReportTest 34 * 35 */ 36 37 import jdk.test.lib.process.ProcessTools; 38 import jdk.test.lib.process.OutputAnalyzer; 39 import jdk.test.lib.JDKToolFinder; 40 41 import sun.hotspot.WhiteBox; 42 43 public class MallocRoundingReportTest { 44 private static long K = 1024; 45 46 public static void main(String args[]) throws Exception { 47 OutputAnalyzer output; 48 WhiteBox wb = WhiteBox.getWhiteBox(); 49 50 // Grab my own PID 51 String pid = Long.toString(ProcessTools.getProcessId()); 52 ProcessBuilder pb = new ProcessBuilder(); 53 54 long[] additionalBytes = {0, 1, 512, 650}; 55 long[] kByteSize = {1024, 2048}; 56 long mallocd_total = 0; 57 for ( int i = 0; i < kByteSize.length; i++) 58 { 59 for (int j = 0; j < (additionalBytes.length); j++) { 60 long curKB = kByteSize[i] + additionalBytes[j]; 61 // round up/down to the nearest KB to match NMT reporting 62 long numKB = (curKB % kByteSize[i] >= 512) ? ((curKB / K) + 1) : curKB / K; 63 // Use WB API to alloc and free with the mtTest type 64 mallocd_total = wb.NMTMalloc(curKB); 65 // Run 'jcmd <pid> VM.native_memory summary', check for expected output 66 // NMT does not track memory allocations less than 1KB, and rounds to the nearest KB 67 String expectedOut = ("Test (reserved=" + numKB + "KB, committed=" + numKB + "KB)"); 68 69 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" }); 70 output = new OutputAnalyzer(pb.start()); 71 output.shouldContain(expectedOut); 72 73 wb.NMTFree(mallocd_total); 74 // Run 'jcmd <pid> VM.native_memory summary', check for expected output 75 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" }); 76 output = new OutputAnalyzer(pb.start()); 77 output.shouldNotContain("Test (reserved="); 78 } 79 } 80 } 81 }