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/*
* @test
* @summary Test commits of overlapping regions of memory.
* @key nmt jcmd
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @build sun.hotspot.WhiteBox
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail CommitOverlappingRegions
*/
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.JDKToolFinder;
import sun.hotspot.WhiteBox;
public class CommitOverlappingRegions {
public static WhiteBox wb = WhiteBox.getWhiteBox();
public static void main(String args[]) throws Exception {
OutputAnalyzer output;
long size = 32 * 1024;
int pagesize = wb.getVMPageSize();
if (size < pagesize) { size = pagesize; } // Should be aligned.
long sizek = size / 1024;
long addr = wb.NMTReserveMemory(8*size);
String pid = Long.toString(ProcessTools.getProcessId());
ProcessBuilder pb = new ProcessBuilder();
pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail"});
System.out.println("Address is " + Long.toHexString(addr));
// Start: . . . . . . . .
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)");
// Committing: * * * . . . . .
// Region: * * * . . . . .
// Expected Total: 3 x sizek KB
wb.NMTCommitMemory(addr + 0*size, 3*size);
// Committing: . . . . * * * .
// Region: * * * . * * * .
// Expected Total: 6 x sizek KB
wb.NMTCommitMemory(addr + 4*size, 3*size);
// Check output after first 2 commits.
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 6*sizek + "KB)");
// Committing: . . * * * . . .
// Region: * * * * * * * .
// Expected Total: 7 x sizek KB
wb.NMTCommitMemory(addr + 2*size, 3*size);
// Check output after overlapping commit.
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 7*sizek + "KB)");
// Uncommitting: * * * * * * * *
// Region: . . . . . . . .
// Expected Total: 0 x sizek KB
wb.NMTUncommitMemory(addr + 0*size, 8*size);
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)");
// Committing: * * . . . . . .
// Region: * * . . . . . .
// Expected Total: 2 x sizek KB
wb.NMTCommitMemory(addr + 0*size, 2*size);
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 2*sizek + "KB)");
// Committing: . * * * . . . .
// Region: * * * * . . . .
// Expected Total: 4 x sizek KB
wb.NMTCommitMemory(addr + 1*size, 3*size);
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 4*sizek + "KB)");
// Uncommitting: * * * . . . . .
// Region: . . . * . . . .
// Expected Total: 1 x sizek KB
wb.NMTUncommitMemory(addr + 0*size, 3*size);
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 1*sizek + "KB)");
// Committing: . . . * * . . .
// Region: . . . * * . . .
// Expected Total: 2 x sizek KB
wb.NMTCommitMemory(addr + 3*size, 2*size);
System.out.println("Address is " + Long.toHexString(addr + 3*size));
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 2*sizek + "KB)");
// Committing: . . . . * * . .
// Region: . . . * * * . .
// Expected Total: 3 x sizek KB
wb.NMTCommitMemory(addr + 4*size, 2*size);
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 3*sizek + "KB)");
// Committing: . . . . . * * .
// Region: . . . * * * * .
// Expected Total: 4 x sizek KB
wb.NMTCommitMemory(addr + 5*size, 2*size);
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 4*sizek + "KB)");
// Committing: . . . . . . * *
// Region: . . . * * * * *
// Expected Total: 5 x sizek KB
wb.NMTCommitMemory(addr + 6*size, 2*size);
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 5*sizek + "KB)");
// Uncommitting: * * * * * * * *
// Region: . . . . . . . .
// Expected Total: 0 x sizek KB
wb.NMTUncommitMemory(addr + 0*size, 8*size);
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)");
}
}