| /* |
| * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @summary Test consistency of NMT by creating allocations of the Test type with various sizes and verifying visibility with jcmd |
| * @key nmt jcmd |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @build sun.hotspot.WhiteBox |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocRoundingReportTest |
| * |
| */ |
| |
| import jdk.test.lib.process.ProcessTools; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import jdk.test.lib.JDKToolFinder; |
| |
| import sun.hotspot.WhiteBox; |
| |
| public class MallocRoundingReportTest { |
| private static long K = 1024; |
| |
| public static void main(String args[]) throws Exception { |
| OutputAnalyzer output; |
| WhiteBox wb = WhiteBox.getWhiteBox(); |
| |
| // Grab my own PID |
| String pid = Long.toString(ProcessTools.getProcessId()); |
| ProcessBuilder pb = new ProcessBuilder(); |
| |
| long[] additionalBytes = {0, 1, 512, 650}; |
| long[] kByteSize = {1024, 2048}; |
| long mallocd_total = 0; |
| for ( int i = 0; i < kByteSize.length; i++) |
| { |
| for (int j = 0; j < (additionalBytes.length); j++) { |
| long curKB = kByteSize[i] + additionalBytes[j]; |
| // round up/down to the nearest KB to match NMT reporting |
| long numKB = (curKB % kByteSize[i] >= 512) ? ((curKB / K) + 1) : curKB / K; |
| // Use WB API to alloc and free with the mtTest type |
| mallocd_total = wb.NMTMalloc(curKB); |
| // Run 'jcmd <pid> VM.native_memory summary', check for expected output |
| // NMT does not track memory allocations less than 1KB, and rounds to the nearest KB |
| String expectedOut = ("Test (reserved=" + numKB + "KB, committed=" + numKB + "KB)"); |
| |
| pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" }); |
| output = new OutputAnalyzer(pb.start()); |
| output.shouldContain(expectedOut); |
| |
| wb.NMTFree(mallocd_total); |
| // Run 'jcmd <pid> VM.native_memory summary', check for expected output |
| pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" }); |
| output = new OutputAnalyzer(pb.start()); |
| output.shouldNotContain("Test (reserved="); |
| } |
| } |
| } |
| } |