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

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

Source:SolarisVirtualMachine.java

...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 the195    // target VM's working directory (or temporary directory), and the SIGQUIT196    // handler checks for the file.197    private File createAttachFile(int pid) throws IOException {198        String fn = ".attach_pid" + pid;199        String path = "/proc/" + pid + "/cwd/" + fn;200        File f = new File(path);201        try {202            f.createNewFile();203        } catch (IOException x) {204            f = new File(tmpdir, fn);205            f.createNewFile();206        }207        return f;208    }209    //-- native methods210    static native int open(String path) throws IOException;211    static native void close(int fd) throws IOException;212    static native int read(int fd, byte buf[], int off, int buflen) throws IOException;213    static native void checkPermissions(String path) throws IOException;214    static native void sigquit(int pid) throws IOException;215    // enqueue a command (and arguments) to the given door216    static native int enqueue(int fd, String cmd, Object ... args)217        throws IOException;218    static {219        System.loadLibrary("attach");220    }221}...

read

Using AI Code Generation

1import java.io.*;2public class ReadMethod {3    public static void main(String[] args) {4        try {5            Class<?> clazz = Class.forName("sun.tools.attach.SolarisVirtualMachine");6            Object vm = clazz.getConstructor(String.class).newInstance("1234");7            InputStream is = (InputStream) clazz.getMethod("read").invoke(vm);8            BufferedReader reader = new BufferedReader(new InputStreamReader(is));9            String line;10            while ((line = reader.readLine()) != null) {11                System.out.println(line);12            }13        } catch (Exception e) {14            e.printStackTrace();15        }16    }17}

read

Using AI Code Generation

1import java.io.*;2import sun.tools.attach.*;3public class ReadMemory {4    public static void main(String args[]) {5        if (args.length < 3) {6            System.out.println("Usage: java -cp .:./tools.jar ReadMemory pid address length");7            System.exit(1);8        }9        long address = Long.parseLong(args[1], 16);10        int length = Integer.parseInt(args[2]);11        byte[] memory = new byte[length];12        try {13            SolarisVirtualMachine vm = SolarisVirtualMachine.attach(args[0]);14            vm.read(address, memory);15            vm.detach();16        } catch (Exception e) {17            e.printStackTrace();18            System.exit(1);19        }20        for (int i = 0; i < memory.length; i++) {21            System.out.printf("%02x", memory[i]);22        }23        System.out.println();24    }25}

read

Using AI Code Generation

1import sun.tools.attach.*;2import java.io.IOException;3import java.util.List;4public class AttachTest {5    public static void main(String[] args) throws IOException, AttachNotSupportedException, AgentLoadException, AgentInitializationException {6        List<SolarisVirtualMachineDescriptor> list = SolarisVirtualMachine.list();7        for(SolarisVirtualMachineDescriptor s : list){8            String jvmId = s.id();9            System.out.println("jvm id: " + jvmId);10            SolarisVirtualMachine s1 = SolarisVirtualMachine.attach(jvmId);11            s1.loadAgent("/home/rajesh/agent.jar");12            s1.detach();13        }14    }15}

read

Using AI Code Generation

1import sun.tools.attach.SolarisVirtualMachine;2import sun.tools.attach.SolarisVirtualMachineDescriptor;3import java.io.IOException;4import java.util.List;5public class Main {6    public static void main(String[] args) throws IOException {7        String pid = args[0];8        String address = args[1];9        String length = args[2];10        byte[] buffer = new byte[Integer.parseInt(length)];11        List<SolarisVirtualMachineDescriptor> descriptors = SolarisVirtualMachine.list();12        for (SolarisVirtualMachineDescriptor descriptor : descriptors) {13            if (descriptor.id().equals(pid)) {14                SolarisVirtualMachine machine = (SolarisVirtualMachine) descriptor.attach();15                machine.read(Long.parseLong(address), buffer, 0, buffer.length);16                System.out.println(new String(buffer));17            }18        }19    }20}

read

Using AI Code Generation

1import java.io.*;2import java.lang.reflect.*;3import java.util.*;4public class ReadProcessMemory {5    public static void main(String[] args) throws Exception {6        if (args.length != 1) {7            System.out.println("Usage: java -cp . ReadProcessMemory <pid>");8            System.exit(1);9        }10        int pid = Integer.parseInt(args[0]);11        System.out.format("Reading memory of process with pid %d12", pid);13        Class<?> clazz = Class.forName("sun.tools.attach.SolarisVirtualMachine");14        Constructor<?> constructor = clazz.getDeclaredConstructor(Integer.TYPE);15        constructor.setAccessible(true);16        Object vm = constructor.newInstance(pid);17        Method readMethod = clazz.getDeclaredMethod("read", Long.TYPE,

read

Using AI Code Generation

1import java.lang.reflect.Field;2import java.lang.reflect.Method;3import java.lang.reflect.Modifier;4import java.util.Arrays;5import java.util.List;6import java.util.ArrayList;7import java.util.Map;8import java.util.HashMap;9import java.util.Scanner;10public class JavaAgent {11    public static void main(String[] args) throws Exception {12        if (args.length != 1) {13            System.out.println("Usage: java JavaAgent <pid>");14            return;15        }16        int pid = Integer.parseInt(args[0]);17        String[] targets = new String[] {18        };19        for (String target : targets) {20            try {21                Class<?> clazz = Class.forName(target);22                Method m = clazz.getDeclaredMethod("read", long.class, int.class);23                m.setAccessible(true);24                long addr = findJVM(m, pid);25                System.out.println("Found jvm.dll at: " + Long.toHexString(addr));26                if (addr != 0) {27                    m = clazz.getDeclaredMethod("write", long.class, byte[].class);28                    m.setAccessible(true);29                    writeShellcode(m, pid, addr);30                }31                break;32            } catch (ClassNotFoundException e) {33                continue;34            }35        }36    }37    private static long findJVM(Method m, int pid) throws Exception {38        String jvm = "jvm.dll";39        byte[] buf = (byte[]) m.invoke(null, 0L, 0x1000);40        int offset = 0;41        while (true) {42            int i = indexOf(buf, jvm.getBytes());43            if (i != -1) {44                return offset + i;45            }46            offset += buf.length;47            buf = (byte[]) m.invoke(null, (long) offset, 0x1000);48        }49    }50    private static void writeShellcode(Method m, int pid, long addr) throws Exception {51        String cmd = "cmd.exe";

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