JcmdDetailDiff.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @summary run NMT baseline, allocate memory and verify output from detail.diff
 * @key nmt jcmd
 * @library /testlibrary /testlibrary/whitebox
 * @build JcmdDetailDiff
 * @run main ClassFileInstaller sun.hotspot.WhiteBox
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail JcmdDetailDiff
 */

import com.oracle.java.testlibrary.*;

import sun.hotspot.WhiteBox;

public class JcmdDetailDiff {

    public static WhiteBox wb = WhiteBox.getWhiteBox();

    public static void main(String args[]) throws Exception {
        ProcessBuilder pb = new ProcessBuilder();
        OutputAnalyzer output;
        // Grab my own PID
        String pid = Integer.toString(ProcessTools.getProcessId());

        long commitSize = 128 * 1024;
        long reserveSize = 256 * 1024;
        long addr;

        // Run 'jcmd <pid> VM.native_memory baseline=true'
        pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "baseline=true"});
        pb.start().waitFor();

        output = new OutputAnalyzer(pb.start());
        output.shouldContain("Baseline succeeded");

        addr = wb.NMTReserveMemory(reserveSize);
        pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail.diff", "scale=KB"});

        output = new OutputAnalyzer(pb.start());
        output.shouldContain("Test (reserved=256KB +256KB, committed=0KB)");

        wb.NMTCommitMemory(addr, commitSize);
        pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail.diff", "scale=KB"});

        output = new OutputAnalyzer(pb.start());
        output.shouldContain("Test (reserved=256KB +256KB, committed=128KB +128KB)");

        wb.NMTUncommitMemory(addr, commitSize);
        pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail.diff", "scale=KB"});

        output = new OutputAnalyzer(pb.start());
        output.shouldContain("Test (reserved=256KB +256KB, committed=0KB)");

        wb.NMTReleaseMemory(addr, reserveSize);
        pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail.diff", "scale=KB"});

        output = new OutputAnalyzer(pb.start());
        output.shouldNotContain("Test (reserved=");
    }
}