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

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

Source:JInfo.java

...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);152    }153    private static void commandLine(String pid) throws IOException {154        HotSpotVirtualMachine vm = (HotSpotVirtualMachine) attach(pid);155        InputStream in = vm.executeJCmd("VM.command_line");156        drain(vm, in);157    }158    private static void sysprops(String pid) throws IOException {159        HotSpotVirtualMachine vm = (HotSpotVirtualMachine) attach(pid);160        InputStream in = vm.executeJCmd("VM.system_properties");161        System.out.println("Java System Properties:");162        drain(vm, in);163    }164    // Attach to <pid>, exiting if we fail to attach165    private static VirtualMachine attach(String pid) {166        try {167            return VirtualMachine.attach(pid);168        } catch (Exception x) {169            String msg = x.getMessage();170            if (msg != null) {171                System.err.println(pid + ": " + msg);172            } else {173                x.printStackTrace();174            }...

executeJCmd

Using AI Code Generation

1import java.io.File;2import java.io.IOException;3import java.lang.reflect.InvocationTargetException;4import java.lang.reflect.Method;5import java.util.Arrays;6import java.util.List;7import com.sun.tools.attach.VirtualMachine;8import com.sun.tools.attach.VirtualMachineDescriptor;9public class JCmd {10    public static void main(String[] args) throws IOException, NoSuchMethodException, SecurityException,11            IllegalAccessException, IllegalArgumentException, InvocationTargetException {12        if (args.length < 2) {13            System.out.println("Usage: JCmd <pid> <command> [args]");14            return;15        }16        int pid = Integer.parseInt(args[0]);17        String command = args[1];18        List<String> arguments = Arrays.asList(args).subList(2, args.length);19        VirtualMachine vm = null;20        for (VirtualMachineDescriptor vmd : VirtualMachine.list()) {21            if (vmd.id().equals(String.valueOf(pid))) {22                vm = VirtualMachine.attach(vmd);23                break;24            }25        }26        if (vm == null) {27            System.out.println("Process " + pid + " not found");28            return;29        }30        File toolsJar = new File(System.getProperty("java.home") + File.separator + "lib" + File.separator + "tools.jar");31        if (!toolsJar.exists()) {32            System.out.println("tools.jar not found");33            return;34        }35        vm.loadAgent(toolsJar.getAbsolutePath());36        Class<?> vmClass = Class.forName("sun.tools.attach.HotSpotVirtualMachine");37        Method executeJCmdMethod = vmClass.getDeclaredMethod("executeJCmd", String.class, String[].class);38        Object result = executeJCmdMethod.invoke(vm, command, arguments.toArray(new String[arguments.size()]));39        System.out.println(result);40    }41}42$ java -cp .;tools.jar JCmd 1234 VM.version

executeJCmd

Using AI Code Generation

1import sun.tools.attach.HotSpotVirtualMachine;2import java.io.IOException;3import java.io.InputStream;4import java.io.InputStreamReader;5import java.io.BufferedReader;6import java.util.List;7import java.util.ArrayList;8import java.util.Arrays;9import java.util.regex.Pattern;10import java.util.regex.Matcher;11public class ExecuteJCmd {12public static void main(String[] args) throws Exception {13String pid = null;14if (args.length > 0) {15pid = args[0];16} else {17pid = getPid();18}19HotSpotVirtualMachine vm = new HotSpotVirtualMachine(pid);20try {21vm.executeJCmd("GC.class_histogram", new String[] {"java.lang.String"});22} finally {23vm.detach();24}25}26private static String getPid() throws Exception {27String name = ExecuteJCmd.class.getName();28String pid = null;29Process process = Runtime.getRuntime().exec("jps");30try {31process.waitFor();32BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));33String line = null;34while ((line = reader.readLine()) != null) {35if (line.indexOf(name) >= 0) {

executeJCmd

Using AI Code Generation

1import java.io.IOException;2import java.lang.reflect.InvocationTargetException;3import java.lang.reflect.Method;4import java.util.Arrays;5import java.util.List;6import java.util.stream.Collectors;7public class ExecuteJCmd {8    public static void main(String[] args) throws IOException, ClassNotFoundException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {9        String pid = args[0];10        String command = args[1];11        String[] arguments = Arrays.copyOfRange(args, 2, args.length);12        Class<?> clazz = Class.forName("sun.tools.attach.HotSpotVirtualMachine");13        Method method = clazz.getDeclaredMethod("executeJCmd", String.class, String[].class);14        method.setAccessible(true);15        String result = (String) method.invoke(null, pid, new Object[]{arguments});16        System.out.println(result);17    }18}19-                 Java Heap (reserved=10737418240, committed=10737418240)20                            (mmap: reserved=10737418240, committed=10737418240)21-                     Class (reserved=268435456, committed=268435456)22                            (classes #=17827)23                            (  ordinary #=17781)24                            (    mirror #=46)25                            (mmap: reserved=268435456, committed=268435456)26-                    Thread (reserved=23068672, committed=23068672)27                            (thread #=20)28                            (stack: reserved=23068672, committed=23068672)29                            (  #bytes used=22934448)30-                      Code (reserved=251658240, committed=251658240)31                            (malloc=251658240 #=1)32-                        GC (reserved=268435456, committed=268435456)33                            (malloc=268435456 #=1)34-                  Compiler (reserved=16777216, committed=16777216)35                            (malloc=16777216 #=1)36-                  Internal (reserved=268435456, committed=268435456)37                            (malloc=268435456 #=1)38-                   Symbol (reserved=5242880, committed=5242880)39                            (

executeJCmd

Using AI Code Generation

1import java.io.*;2import java.lang.management.*;3import java.util.*;4import java.util.concurrent.*;5import java.util.concurrent.atomic.*;6import java.util.concurrent.locks.*;7import java.util.function.*;8import java.util.stream.*;9import java.util.stream.Collectors.*;10import java.util.stream.StreamSupport.*;11import java.util.regex.*;12import java.util.regex.Pattern.*;13import java.util.regex.Matcher.*;14import java.util.regex.PatternSyntaxException.*;15import java.util.regex.MatchResult.*;16import java.util.regex.MatchResult.*;17import java.nio.*;18import java.nio.file.*;19import java.nio.file.attribute.*;20import java.nio.file.attribute.BasicFileAttributes.*;21import java.nio.file.attribute.FileTime.*;22import java.nio.file.attribute.PosixFilePermission.*;23import java.nio.file.attribute.PosixFilePermissions.*;24import java.nio.fil

executeJCmd

Using AI Code Generation

1import sun.tools.attach.HotSpotVirtualMachine2import java.util.regex.Pattern3import java.util.regex.Matcher4import java.util.Properties5def vm = HotSpotVirtualMachine.attach(pid)6def props = vm.getSystemProperties()7def javaVersion = props.getProperty("java.version")8def javaHome = props.getProperty("java.home")9def jstackVersion = execute(jstackCommand, "-V")10def jstackVersionMatcher = Pattern.compile("jstack version (\\S+)").matcher(jstackVersion)11if (jstackVersionMatcher.find()) {12    jstackVersion = jstackVersionMatcher.group(1)13}14def jstackOutput = execute(jstackCommand, pid)15def jstackOutputMatcher = Pattern.compile("Full thread dump (Java HotSpot\\(TM\\) (\\S+)\\(\\S+\\) \\S+ \\S+ \\S+)").matcher(jstackOutput)16if (jstackOutputMatcher.find()) {17    jstackOutput = jstackOutputMatcher.group(1)18}19def jstackCmdLineMatcher = Pattern.compile("Command line: (.*)").matcher(jstackOutput)20if (jstackCmdLineMatcher.find()) {21    jstackCommandLine = jstackCmdLineMatcher.group(1)22}23def jstackOutputHeader = jstackOutputMatcher.group(1)24def jstackVMType = jstackOutputMatcher.group(2)25def jstackVMTypeMatcher = Pattern.compile("(.*)\\(\\S+

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