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/*
* @test
* @summary Test Reserve/Commit/Uncommit/Release of virtual memory and that we track it correctly
* @key nmt jcmd
* @library /testlibrary /testlibrary/whitebox
* @build VirtualAllocTestType
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail VirtualAllocTestType
*/
import com.oracle.java.testlibrary.*;
import sun.hotspot.WhiteBox;
public class VirtualAllocTestType {
public static WhiteBox wb = WhiteBox.getWhiteBox();
public static void main(String args[]) throws Exception {
OutputAnalyzer output;
long commitSize = 128 * 1024;
long reserveSize = 256 * 1024;
long addr;
String pid = Integer.toString(ProcessTools.getProcessId());
ProcessBuilder pb = new ProcessBuilder();
addr = wb.NMTReserveMemory(reserveSize);
mergeData();
pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail"});
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=256KB, committed=0KB)");
output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved 256KB for Test");
wb.NMTCommitMemory(addr, commitSize);
mergeData();
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=256KB, committed=128KB)");
output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed 128KB");
wb.NMTUncommitMemory(addr, commitSize);
mergeData();
output = new OutputAnalyzer(pb.start());
output.shouldContain("Test (reserved=256KB, committed=0KB)");
output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed");
wb.NMTReleaseMemory(addr, reserveSize);
mergeData();
output = new OutputAnalyzer(pb.start());
output.shouldNotContain("Test (reserved=");
output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved");
}
public static void mergeData() throws Exception {
// Use WB API to ensure that all data has been merged before we continue
if (!wb.NMTWaitForDataMerge()) {
throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
}
}
}