How to use setFlag method of sun.tools.attach.HotSpotVirtualMachine class

Best Powermock code snippet using sun.tools.attach.HotSpotVirtualMachine.setFlag

Source:JInfo.java Github

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...123 int index = option.indexOf('=');124 if (index != -1) {125 flag = option.substring(0, index);126 String value = option.substring(index + 1);127 in = vm.setFlag(flag, value);128 } else {129 char c = option.charAt(0);130 switch (c) {131 case '+':132 flag = option.substring(1);133 in = vm.setFlag(flag, "1");134 break;135 case '-':136 flag = option.substring(1);137 in = vm.setFlag(flag, "0");138 break;139 default:140 flag = option;141 in = vm.printFlag(flag);142 break;143 }144 }145 drain(vm, in);146 }147 private static void flags(String pid) throws IOException {148 HotSpotVirtualMachine vm = (HotSpotVirtualMachine) attach(pid);149 InputStream in = vm.executeJCmd("VM.flags");150 System.out.println("VM Flags:");151 drain(vm, in);...

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Source:AttachSetGetFlag.java Github

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...22 */23/*24 * @test25 * @bug 805482326 * @summary Tests the setFlag and printFlag attach command27 * @library /test/lib28 * @modules java.base/jdk.internal.misc29 * java.compiler30 * java.management31 * jdk.attach/sun.tools.attach32 * jdk.internal.jvmstat/sun.jvmstat.monitor33 * @run main AttachSetGetFlag34 */35import java.io.BufferedReader;36import java.io.InputStreamReader;37import java.io.InputStream;38import java.lang.reflect.Field;39import java.nio.file.Files;40import java.nio.file.Path;41import java.nio.file.Paths;42import sun.tools.attach.HotSpotVirtualMachine;43import jdk.test.lib.Asserts;44import jdk.test.lib.Platform;45import jdk.test.lib.process.ProcessTools;46import com.sun.tools.attach.VirtualMachine;47public class AttachSetGetFlag {48 public static void main(String... args) throws Exception {49 // Test a manageable uintx flag.50 testGetFlag("MaxHeapFreeRatio", "60");51 testSetFlag("MaxHeapFreeRatio", "50", "60");52 // Test a non-manageable size_t flag.53 // Since it is not manageable, we can't test the setFlag functionality.54 testGetFlag("ArrayAllocatorMallocLimit", "128");55 // testSetFlag("ArrayAllocatorMallocLimit", "64", "128");56 // Test a uint flag.57 testGetFlag("ParallelGCThreads", "10");58 }59 public static ProcessBuilder runTarget(String flagName, String flagValue) throws Exception {60 return ProcessTools.createJavaProcessBuilder(61 "-XX:+UnlockExperimentalVMOptions",62 "-XX:" + flagName + "=" + flagValue,63 "AttachSetGetFlag$Target");64 }65 public static void testGetFlag(String flagName, String flagValue) throws Exception {66 ProcessBuilder pb = runTarget(flagName, flagValue);67 Process target = pb.start();68 try {69 waitForReady(target);70 int pid = (int)target.pid();71 HotSpotVirtualMachine vm = (HotSpotVirtualMachine)VirtualMachine.attach(((Integer)pid).toString());72 // Test Get73 BufferedReader remoteDataReader = new BufferedReader(new InputStreamReader(74 vm.printFlag(flagName)));75 boolean foundExpectedLine = false;76 String line = null;77 while((line = remoteDataReader.readLine()) != null) {78 System.out.println("printFlag: " + line);79 if (line.equals("-XX:" + flagName + "=" + flagValue)) {80 foundExpectedLine = true;81 }82 }83 Asserts.assertTrue(foundExpectedLine, "Didn't get the expected output: '-XX:" + flagName + "=" + flagValue + "'");84 vm.detach();85 }86 finally {87 target.destroy();88 target.waitFor();89 }90 }91 public static void testSetFlag(String flagName, String initialFlagValue, String flagValue) throws Exception {92 ProcessBuilder pb = runTarget(flagName, initialFlagValue);93 Process target = pb.start();94 try {95 waitForReady(target);96 int pid = (int)target.pid();97 HotSpotVirtualMachine vm = (HotSpotVirtualMachine)VirtualMachine.attach(((Integer)pid).toString());98 // First set the value.99 BufferedReader remoteDataReader = new BufferedReader(new InputStreamReader(100 vm.setFlag(flagName, flagValue)));101 String line;102 while((line = remoteDataReader.readLine()) != null) {103 System.out.println("setFlag: " + line);104 // Just empty the stream.105 }106 remoteDataReader.close();107 // Then read and make sure we get back the set value.108 remoteDataReader = new BufferedReader(new InputStreamReader(vm.printFlag(flagName)));109 boolean foundExpectedLine = false;110 line = null;111 while((line = remoteDataReader.readLine()) != null) {112 System.out.println("getFlag: " + line);113 if (line.equals("-XX:" + flagName + "=" + flagValue)) {114 foundExpectedLine = true;115 }116 }117 Asserts.assertTrue(foundExpectedLine, "Didn't get the expected output: '-XX:" + flagName + "=" + flagValue + "'");...

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Source:AttachModelImpl.java Github

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...89 }90 return null;91 }92 93 public synchronized void setFlag(String name, String value) {94 try {95 InputStream in = getVirtualMachine().setFlag(name,value);96 String out = readToEOF(in);97 if (out.length()>0) {98 LOGGER.log(Level.INFO,"setFlag",out); // NOI18N99 }100 } catch (IOException ex) {101 LOGGER.log(Level.INFO,"setFlag",ex); // NOI18N102 }103 }104 public synchronized HeapHistogramImpl takeHeapHistogram() {105 try {106 InputStream in = getVirtualMachine().heapHisto(ALL_OBJECTS_OPTION);107 HeapHistogramImpl h = new HeapHistogramImpl(in);108 in.close();109 return h;110 } catch (IOException ex) {111 LOGGER.log(Level.INFO,"takeHeapHistogram",ex); // NOI18N112 }113 return null;114 }115 ...

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setFlag

Using AI Code Generation

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1import com.sun.tools.attach.VirtualMachine;2import com.sun.tools.attach.VirtualMachineDescriptor;3import sun.tools.attach.HotSpotVirtualMachine;4import java.util.List;5import java.util.Properties;6public class 4 {7 public static void main(String[] args) throws Exception {8 List<VirtualMachineDescriptor> vmds = VirtualMachine.list();9 for (VirtualMachineDescriptor vmd : vmds) {10 if (vmd.displayName().contains("YourApplication")) {11 VirtualMachine vm = VirtualMachine.attach(vmd);12 HotSpotVirtualMachine hvm = (HotSpotVirtualMachine) vm;13 Properties props = hvm.getSystemProperties();14 String javaVersion = props.getProperty("java.version");15 System.out.println("java version is: " + javaVersion);16 hvm.setFlag("PrintGCDetails", "true");17 hvm.setFlag("PrintGCTimeStamps", "true");18 hvm.setFlag("PrintGCDateStamps", "true");19 hvm.setFlag("PrintTenuringDistribution", "true");20 hvm.setFlag("PrintHeapAtGC", "true");21 hvm.setFlag("PrintGCApplicationStoppedTime", "true");22 hvm.setFlag("PrintGCApplicationConcurrentTime", "true");23 hvm.setFlag("PrintGCApplicationConcurrentTime", "true");24 hvm.setFlag("PrintGCDetails", "true");25 hvm.setFlag("PrintGC", "true");26 hvm.setFlag("PrintGCApplicationStoppedTime", "true");27 hvm.setFlag("PrintGCDateStamps", "true");28 hvm.setFlag("PrintGCTimeStamps", "true");29 hvm.setFlag("PrintGCApplicationStoppedTime", "true");30 hvm.setFlag("PrintTenuringDistribution", "true");31 hvm.setFlag("PrintHeapAtGC", "true");32 hvm.setFlag("PrintGCApplicationConcurrentTime", "true");33 hvm.setFlag("PrintGC", "true");34 hvm.setFlag("PrintGCDetails", "true");35 hvm.setFlag("PrintGCDateStamps", "true");36 hvm.setFlag("PrintGCTimeStamps", "true");37 hvm.setFlag("PrintGCApplicationStoppedTime", "true");38 hvm.setFlag("PrintTenuringDistribution", "true");39 hvm.setFlag("

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setFlag

Using AI Code Generation

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1import com.sun.tools.attach.*;2import com.sun.tools.attach.VirtualMachine;3import com.sun.tools.attach.VirtualMachineDescriptor;4import java.util.*;5import java.util.List;6public class 4 {7 public static void main(String[] args) throws Exception {8 List<VirtualMachineDescriptor> vmlist = VirtualMachine.list();9 int i = 1;10 System.out.println("List of VMs:");11 for (VirtualMachineDescriptor vmd : vmlist) {12 System.out.println(i + ". " + vmd.displayName() + "("13 + vmd.id() + ")");14 i++;15 }16 System.out.println("Enter the number of the VM you want to attach to:");17 Scanner input = new Scanner(System.in);18 int num = input.nextInt();19 VirtualMachine vm = VirtualMachine.attach(vmlist.get(num - 1).id());20 vm.setFlag("PrintGC", "true");21 vm.setFlag("PrintGCDetails", "true");22 vm.setFlag("PrintGCTimeStamps", "true");23 vm.detach();24 }25}261. AttachTest (1832)272. AttachTest (1836)283. AttachTest (1839)294. AttachTest (1842)305. AttachTest (1845)316. AttachTest (1848)327. AttachTest (1851)338. AttachTest (1854)349. AttachTest (1857)3510. AttachTest (1860)3611. AttachTest (1863)3712. AttachTest (1866)3813. AttachTest (1869)3914. AttachTest (1872)4015. AttachTest (1875)4116. AttachTest (1878)4217. AttachTest (1881)4318. AttachTest (1884)4419. AttachTest (1887)4520. AttachTest (1890)4621. AttachTest (1893)4722. AttachTest (1896)4823. AttachTest (1899)4924. AttachTest (1902)5025. AttachTest (1905)5126. AttachTest (1908)5227. AttachTest (1911)5328. AttachTest (1914)5429. AttachTest (1917)5530. AttachTest (1920)5631. AttachTest (1923)

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setFlag

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1import java.io.IOException;2import com.sun.tools.attach.VirtualMachine;3import com.sun.tools.attach.AttachNotSupportedException;4import sun.tools.attach.HotSpotVirtualMachine;5public class 4 {6public static void main(String[] args) {7if (args.length != 2) {8System.out.println("Usage: java 4 <pid> <flag>");9System.exit(1);10}11String pid = args[0];12String flag = args[1];13try {14HotSpotVirtualMachine vm = (HotSpotVirtualMachine) VirtualMachine15.attach(pid);16vm.setFlag(flag, true);17vm.detach();18} catch (AttachNotSupportedException e) {19System.out.println("Attach not supported: " + e.getMessage());20} catch (IOException e) {21System.out.println("I/O Exception: " + e.getMessage());22}23}24}25import java.io.IOException;26import com.sun.tools.attach.VirtualMachine;27import com.sun.tools.attach.AttachNotSupportedException;28import sun.tools.attach.HotSpotVirtualMachine;29public class 5 {30public static void main(String[] args) {31if (args.length != 2) {32System.out.println("Usage: java 5 <pid> <flag>");33System.exit(1);34}35String pid = args[0];36String flag = args[1];37try {38HotSpotVirtualMachine vm = (HotSpotVirtualMachine) VirtualMachine39.attach(pid);40vm.setFlag(flag, false);41vm.detach();42} catch (AttachNotSupportedException e) {43System.out.println("Attach not supported: " + e.getMessage());44} catch (IOException e) {45System.out.println("I/O Exception: " + e.getMessage());46}47}48}49import java.io.IOException;50import com.sun.tools.attach.VirtualMachine;51import com.sun.tools.attach.AttachNotSupportedException;52import sun.tools.attach.HotSpotVirtualMachine;53public class 6 {54public static void main(String[] args) {55if (args.length != 3) {56System.out.println("Usage: java 6 <pid> <flag> <value>");57System.exit(1);58}

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setFlag

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1import sun.tools.attach.*;2import com.sun.tools.attach.*;3import java.util.*;4import java.io.*;5import java.lang.management.*;6{7public static void main(String args[])throws Exception8{9String pid = "1234";10HotSpotVirtualMachine vm = (HotSpotVirtualMachine)VirtualMachine.attach(pid);11vm.setFlag("PrintGCDetails", "true");12vm.detach();13}14}15import sun.tools.attach.*;16import com.sun.tools.attach.*;17import java.util.*;18import java.io.*;19import java.lang.management.*;20{21public static void main(String args[])throws Exception22{23String pid = "1234";24HotSpotVirtualMachine vm = (HotSpotVirtualMachine)VirtualMachine.attach(pid);25vm.setFlag("PrintGCDetails", "true");26vm.detach();27}28}29import sun.tools.attach.*;30import com.sun.tools.attach.*;31import java.util.*;32import java.io.*;33import java.lang.management.*;34{35public static void main(String args[])throws Exception36{37String pid = "1234";38HotSpotVirtualMachine vm = (HotSpotVirtualMachine)VirtualMachine.attach(pid);39vm.setFlag("PrintGCDetails", "true");40vm.detach();41}42}43import sun.tools.attach.*;44import com.sun.tools.attach.*;45import java.util.*;46import java.io.*;47import java.lang.management.*;48{49public static void main(String args[])throws Exception50{51String pid = "1234";

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setFlag

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1import com.sun.tools.attach.*;2import java.io.IOException;3import java.util.Properties;4import java.util.Set;5import java.util.Map;6import java.util.HashMap;7import java.util.Iterator;8import java.util.List;9import java.util.ArrayList;10import java.util.Arrays;11import java.util.Collections;12import java.util.Scanner;13public class 4 {14 public static void main(String[] args) throws IOException, AttachNotSupportedException, AgentLoadException, AgentInitializationException {15 String pid = args[0];16 String flag = args[1];17 String value = args[2];18 VirtualMachine vm = VirtualMachine.attach(pid);19 Properties props = vm.getSystemProperties();20 String version = props.getProperty("java.version");21 String[] versionParts = version.split("\\.");22 String major = versionParts[0];23 String minor = versionParts[1];24 String patch = versionParts[2];25 String classpath = System.getProperty("java.class.path");26 if(Integer.parseInt(major) >= 9) {27 vm.loadAgent(classpath);28 } else {29 vm.loadAgent(classpath, flag + "=" + value);30 }31 vm.detach();32 }33}34import com.sun.tools.attach.*;35import java.io.IOException;36import java.util.Properties;37import java.util.Set;38import java.util.Map;39import java.util.HashMap;40import java.util.Iterator;41import java.util.List;42import java.util.ArrayList;43import java.util.Arrays;44import java.util.Collections;45import java.util.Scanner;46public class 4 {47 public static void main(String[] args) throws IOException, AttachNotSupportedException, AgentLoadException, AgentInitializationException {48 String pid = args[0];49 String flag = args[1];50 String value = args[2];51 VirtualMachine vm = VirtualMachine.attach(pid);52 Properties props = vm.getSystemProperties();53 String version = props.getProperty("java.version");54 String[] versionParts = version.split("\\.");55 String major = versionParts[0];56 String minor = versionParts[1];57 String patch = versionParts[2];58 String classpath = System.getProperty("java.class.path");59 if(Integer.parseInt(major) >= 9) {60 vm.loadAgent(classpath);61 } else {62 vm.loadAgent(class

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setFlag

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1import java.io.IOException;2import java.util.Properties;3import sun.tools.attach.HotSpotVirtualMachine;4public class 4 {5 public static void main(String[] args) throws IOException {6 String pid = "1234";7 String flag = "PrintGC";8 String value = "true";9 HotSpotVirtualMachine vm = new HotSpotVirtualMachine(pid);10 Properties props = vm.getSystemProperties();11 String javaHome = props.getProperty("java.home");12 String javaCmd = javaHome + "/bin/java";13 String attachLib = javaHome + "/lib/sa-jdi.jar";14 String cmd = javaCmd + " -cp " + attachLib + " sun.tools.attach.HotSpotVirtualMachine " + pid + " setFlag " + flag + " " + value;15 System.out.println("Command: " + cmd);16 Process p = Runtime.getRuntime().exec(cmd);17 }18}

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setFlag

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1import java.io.*;2import java.lang.management.*;3import java.util.*;4import com.sun.tools.attach.*;5{6public static void main(String[] args) throws Exception7{8String pid = args[0];9String vmName = args[1];10String heapDumpFile = args[2];11String threadDumpFile = args[3];12String optionName = args[4];13String optionValue = args[5];14String newHeapDumpFile = args[6];15String newThreadDumpFile = args[7];16HotSpotVirtualMachine vm = (HotSpotVirtualMachine) VirtualMachine.attach(pid);17vm.setFlag("-XX:+UnlockDiagnosticVMOptions", true);18vm.setFlag("-XX:+UnlockExperimentalVMOptions", true);19vm.heapDump(heapDumpFile);20vm.dumpThreads(new FileOutputStream(threadDumpFile), null);21vm.setFlag(optionName, optionValue);22vm.executeJCmd("Thread.print", new FileOutputStream(newThreadDumpFile));23vm.executeJCmd("GC.heap_dump", new FileOutputStream(newHeapDumpFile));

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setFlag

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1import java.io.IOException;2import java.util.Properties;3import sun.tools.attach.HotSpotVirtualMachine;4import com.sun.tools.attach.VirtualMachine;5import com.sun.tools.attach.VirtualMachineDescriptor;6public class 4 {7public static void main(String[] args) throws IOException, InterruptedException {8String processId = "1234";9String flagName = "PrintGCDetails";10String flagValue = "true";11VirtualMachine vm = null;12for (VirtualMachineDescriptor vmd : VirtualMachine.list()) {13if (vmd.id().equals(processId)) {14vm = VirtualMachine.attach(vmd);15}16}17HotSpotVirtualMachine hvm = (HotSpotVirtualMachine) vm;18Properties props = hvm.getSystemProperties();19System.out.println(props.getProperty("java.runtime.name") + " " +20props.getProperty("java.runtime.version") + " " +21props.getProperty("java.vm.name") + " " +22props.getProperty("java.vm.version"));23hvm.setFlag(flagName, flagValue);24Thread.sleep(5000);25hvm.detach();26}27}

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