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How to use openDoor method of sun.tools.attach.SolarisVirtualMachine class

Best Powermock code snippet using sun.tools.attach.SolarisVirtualMachine.openDoor

Source:SolarisVirtualMachine.java

...60        // Opens the door file to the target VM. If the file is not61        // found it might mean that the attach mechanism isn't started in the62        // target VM so we attempt to start it and retry.63        try {64            fd = openDoor(pid);65        } catch (FileNotFoundException fnf1) {66            File f = createAttachFile(pid);67            try {68                // kill -QUIT will tickle target VM to check for the69                // attach file.70                sigquit(pid);71                // give the target VM time to start the attach mechanism72                int i = 0;73                long delay = 200;74                int retries = (int)(attachTimeout() / delay);75                do {76                    try {77                        Thread.sleep(delay);78                    } catch (InterruptedException x) { }79                    try {80                        fd = openDoor(pid);81                    } catch (FileNotFoundException fnf2) { }82                    i++;83                } while (i <= retries && fd == -1);84                if (fd == -1) {85                    throw new AttachNotSupportedException(86                        "Unable to open door: target process not responding or " +87                        "HotSpot VM not loaded");88                }89            } finally {90                f.delete();91            }92        }93        assert fd >= 0;94    }95    /**96     * Detach from the target VM97     */98    public void detach() throws IOException {99        synchronized (this) {100            if (fd != -1) {101                close(fd);102                fd = -1;103            }104        }105    }106    /**107     * Execute the given command in the target VM.108     */109    InputStream execute(String cmd, Object ... args) throws AgentLoadException, IOException {110        assert args.length <= 3;                // includes null111        // first check that we are still attached112        int door;113        synchronized (this) {114            if (fd == -1) {115                throw new IOException("Detached from target VM");116            }117            door = fd;118        }119        // enqueue the command via a door call120        int s = enqueue(door, cmd, args);121        assert s >= 0;                          // valid file descriptor122        // The door call returns a file descriptor (one end of a socket pair).123        // Create an input stream around it.124        SocketInputStream sis = new SocketInputStream(s);125        // Read the command completion status126        int completionStatus;127        try {128            completionStatus = readInt(sis);129        } catch (IOException ioe) {130            sis.close();131            throw ioe;132        }133        // If non-0 it means an error but we need to special-case the134        // "load" command to ensure that the right exception is thrown.135        if (completionStatus != 0) {136            // read from the stream and use that as the error message137            String message = readErrorMessage(sis);138            sis.close();139            if (cmd.equals("load")) {140                throw new AgentLoadException("Failed to load agent library");141            } else {142                if (message == null) {143                    throw new AttachOperationFailedException("Command failed in target VM");144                } else {145                    throw new AttachOperationFailedException(message);146                }147            }148        }149        // Return the input stream so that the command output can be read150        return sis;151    }152    // InputStream over a socket153    private class SocketInputStream extends InputStream {154        int s;155        public SocketInputStream(int s) {156            this.s = s;157        }158        public synchronized int read() throws IOException {159            byte b[] = new byte[1];160            int n = this.read(b, 0, 1);161            if (n == 1) {162                return b[0] & 0xff;163            } else {164                return -1;165            }166        }167        public synchronized int read(byte[] bs, int off, int len) throws IOException {168            if ((off < 0) || (off > bs.length) || (len < 0) ||169                ((off + len) > bs.length) || ((off + len) < 0)) {170                throw new IndexOutOfBoundsException();171            } else if (len == 0)172                return 0;173            return SolarisVirtualMachine.read(s, bs, off, len);174        }175        public void close() throws IOException {176            SolarisVirtualMachine.close(s);177        }178    }179    // The door is attached to .java_pid<pid> in the temporary directory.180    private int openDoor(int pid) throws IOException {181        String path = tmpdir + "/.java_pid" + pid;;182        fd = open(path);183        // Check that the file owner/permission to avoid attaching to184        // bogus process185        try {186            checkPermissions(path);187        } catch (IOException ioe) {188            close(fd);189            throw ioe;190        }191        return fd;192    }193    // On Solaris/Linux a simple handshake is used to start the attach mechanism194    // if not already started. The client creates a .attach_pid<pid> file in the...

openDoor

Using AI Code Generation

1import sun.tools.attach.SolarisVirtualMachine;2{3    public static void main(String[] args) throws Exception4    {5        SolarisVirtualMachine vm = new SolarisVirtualMachine("12345");6        vm.openDoor();7    }8}9Exception in thread "main" java.lang.UnsatisfiedLinkError: sun/tools/attach/SolarisVirtualMachine.openDoor()V10	at sun.tools.attach.SolarisVirtualMachine.openDoor(Native Method)11	at SolarisDoor.main(SolarisDoor.java:12)12Exception in thread "main" java.lang.UnsatisfiedLinkError: sun/tools/attach/SolarisVirtualMachine.openDoor()V13	at sun.tools.attach.SolarisVirtualMachine.openDoor(Native Method)14	at SolarisDoor.main(SolarisDoor.java:12)15Exception in thread "main" java.lang.UnsatisfiedLinkError: sun/tools/attach/SolarisVirtualMachine.openDoor()V16	at sun.tools.attach.SolarisVirtualMachine.openDoor(Native Method)17	at SolarisDoor.main(SolarisDoor.java:12)18The Java Virtual Machine (JVM) is the virtual machine that executes Java bytecodes. It is a specification and a reference implementation

openDoor

Using AI Code Generation

1import java.io.*;2import sun.tools.attach.*;3public class OpenDoor {4	public static void main(String[] args) throws Exception {5		String pid = args[0];6		String door = args[1];7		SolarisVirtualMachine vm = new SolarisVirtualMachine(pid);8		vm.openDoor(door);9	}10}

openDoor

Using AI Code Generation

1import sun.tools.attach.SolarisVirtualMachine;2public class OpenFDSolaris {3    public static void main(String[] args) throws Exception {4        System.out.println("OpenFDSolaris");5        System.out.println("Usage: java OpenFDSolaris <PID>");6        System.out.println("Example: java OpenFDSolaris 1234");7        if (args.length < 1) {8            System.out.println("Error: PID is missing");9            return;10        }11        int pid = Integer.parseInt(args[0]);12        System.out.println("PID: " + pid);13        int fd = SolarisVirtualMachine.openDoor(pid);14        System.out.println("File descriptor: " + fd);15    }16}17import java.io.FileDescriptor;18import java.io.FileInputStream;19import java.io.FileOutputStream;20import java.io.IOException;21public class ReadMemSolaris {22    public static void main(String[] args) throws Exception {23        System.out.println("ReadMemSolaris");24        System.out.println("Usage: java ReadMemSolaris <PID> <address> <length>");25        System.out.println("Example: java ReadMemSolaris 1234 0x12345678 0x1000");26        if (args.length < 3) {27            System.out.println("Error: PID, address or length is missing");28            return;29        }30        int pid = Integer.parseInt(args[0]);31        System.out.println("PID: " + pid);32        long addr = Long.decode(args[1]);

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