150 lines
6.2 KiB
Java
150 lines
6.2 KiB
Java
/*
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* Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @summary Test commits of overlapping regions of memory.
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail CommitOverlappingRegions
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*/
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.JDKToolFinder;
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import jdk.test.whitebox.WhiteBox;
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public class CommitOverlappingRegions {
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public static WhiteBox wb = WhiteBox.getWhiteBox();
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public static void main(String args[]) throws Exception {
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OutputAnalyzer output;
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long size = 32 * 1024;
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int pagesize = wb.getVMPageSize();
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if (size < pagesize) { size = pagesize; } // Should be aligned.
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long sizek = size / 1024;
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long addr = wb.NMTReserveMemory(8*size);
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String pid = Long.toString(ProcessTools.getProcessId());
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ProcessBuilder pb = new ProcessBuilder();
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pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail"});
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System.out.println("Address is " + Long.toHexString(addr));
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// Start: . . . . . . . .
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)");
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// Committing: * * * . . . . .
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// Region: * * * . . . . .
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// Expected Total: 3 x sizek KB
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wb.NMTCommitMemory(addr + 0*size, 3*size);
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// Committing: . . . . * * * .
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// Region: * * * . * * * .
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// Expected Total: 6 x sizek KB
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wb.NMTCommitMemory(addr + 4*size, 3*size);
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// Check output after first 2 commits.
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 6*sizek + "KB)");
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// Committing: . . * * * . . .
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// Region: * * * * * * * .
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// Expected Total: 7 x sizek KB
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wb.NMTCommitMemory(addr + 2*size, 3*size);
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// Check output after overlapping commit.
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 7*sizek + "KB)");
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// Uncommitting: * * * * * * * *
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// Region: . . . . . . . .
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// Expected Total: 0 x sizek KB
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wb.NMTUncommitMemory(addr + 0*size, 8*size);
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)");
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// Committing: * * . . . . . .
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// Region: * * . . . . . .
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// Expected Total: 2 x sizek KB
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wb.NMTCommitMemory(addr + 0*size, 2*size);
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 2*sizek + "KB)");
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// Committing: . * * * . . . .
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// Region: * * * * . . . .
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// Expected Total: 4 x sizek KB
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wb.NMTCommitMemory(addr + 1*size, 3*size);
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 4*sizek + "KB)");
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// Uncommitting: * * * . . . . .
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// Region: . . . * . . . .
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// Expected Total: 1 x sizek KB
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wb.NMTUncommitMemory(addr + 0*size, 3*size);
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 1*sizek + "KB)");
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// Committing: . . . * * . . .
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// Region: . . . * * . . .
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// Expected Total: 2 x sizek KB
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wb.NMTCommitMemory(addr + 3*size, 2*size);
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System.out.println("Address is " + Long.toHexString(addr + 3*size));
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 2*sizek + "KB)");
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// Committing: . . . . * * . .
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// Region: . . . * * * . .
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// Expected Total: 3 x sizek KB
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wb.NMTCommitMemory(addr + 4*size, 2*size);
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 3*sizek + "KB)");
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// Committing: . . . . . * * .
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// Region: . . . * * * * .
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// Expected Total: 4 x sizek KB
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wb.NMTCommitMemory(addr + 5*size, 2*size);
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 4*sizek + "KB)");
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// Committing: . . . . . . * *
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// Region: . . . * * * * *
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// Expected Total: 5 x sizek KB
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wb.NMTCommitMemory(addr + 6*size, 2*size);
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 5*sizek + "KB)");
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// Uncommitting: * * * * * * * *
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// Region: . . . . . . . .
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// Expected Total: 0 x sizek KB
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wb.NMTUncommitMemory(addr + 0*size, 8*size);
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output = new OutputAnalyzer(pb.start());
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output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)");
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}
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}
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