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

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

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...39 /​/​ target VM so we attempt to start it and retry.40 try {41 fd = openDoor(pid);42 } catch (FileNotFoundException fnf1) {43 File f = createAttachFile(pid);44 try {45 /​/​ kill -QUIT will tickle target VM to check for the46 /​/​ attach file.47 sigquit(pid);48 /​/​ give the target VM time to start the attach mechanism49 int i = 0;50 long delay = 200;51 int retries = (int)(attachTimeout() /​ delay);52 do {53 try {54 Thread.sleep(delay);55 } catch (InterruptedException x) { }56 try {57 fd = openDoor(pid);58 } catch (FileNotFoundException fnf2) { }59 i++;60 } while (i <= retries && fd == -1);61 if (fd == -1) {62 throw new AttachNotSupportedException(63 "Unable to open door: target process not responding or " + 64 "HotSpot VM not loaded");65 }66 } finally {67 f.delete();68 }69 }70 assert fd >= 0;71 }72 /​**73 * Detach from the target VM74 */​75 public void detach() throws IOException {76 synchronized (this) {77 if (fd != -1) {78 close(fd); 79 fd = -1;80 }81 }82 }83 84 /​**85 * Execute the given command in the target VM.86 */​ 87 InputStream execute(String cmd, Object ... args) throws AgentLoadException, IOException {88 assert args.length <= 3; /​/​ includes null89 /​/​ first check that we are still attached90 int door;91 synchronized (this) {92 if (fd == -1) {93 throw new IOException("Detached from target VM");94 }95 door = fd;96 }97 /​/​ enqueue the command via a door call98 int s = enqueue(door, cmd, args);99 assert s >= 0; /​/​ valid file descriptor100 /​/​ The door call returns a file descriptor (one end of a socket pair).101 /​/​ Create an input stream around it.102 SocketInputStream sis = new SocketInputStream(s);103 /​/​ Read the command completion status104 int completionStatus;105 try {106 completionStatus = readInt(sis);107 } catch (IOException ioe) {108 sis.close();109 throw ioe;110 }111 /​/​ If non-0 it means an error but we need to special-case the112 /​/​ "load" command to ensure that the right exception is thrown.113 if (completionStatus != 0) {114 sis.close();115 if (cmd.equals("load")) {116 throw new AgentLoadException("Failed to load agent library");117 } else {118 throw new IOException("Command failed in target VM");119 }120 }121 /​/​ Return the input stream so that the command output can be read122 return sis;123 }124 /​/​ InputStream over a socket125 private class SocketInputStream extends InputStream {126 int s;127 public SocketInputStream(int s) {128 this.s = s;129 }130 public synchronized int read() throws IOException {131 byte b[] = new byte[1];132 int n = this.read(b, 0, 1);133 if (n == 1) {134 return b[0] & 0xff;135 } else {136 return -1;137 }138 }139 public synchronized int read(byte[] bs, int off, int len) throws IOException {140 if ((off < 0) || (off > bs.length) || (len < 0) ||141 ((off + len) > bs.length) || ((off + len) < 0)) {142 throw new IndexOutOfBoundsException();143 } else if (len == 0)144 return 0;145 return SolarisVirtualMachine.read(s, bs, off, len);146 }147 public void close() throws IOException {148 SolarisVirtualMachine.close(s);149 }150 }151 /​/​ The door is attached to .java_pid<pid> in the target VM's working152 /​/​ directory or /​tmp. 153 private int openDoor(int pid) throws IOException {154 /​/​ First check for a .java_pid<pid> file in the working directory155 /​/​ of the target process156 String fn = ".java_pid" + pid;157 String path = "/​proc/​" + pid + "/​cwd/​" + fn;158 try {159 fd = open(path);160 } catch (FileNotFoundException fnf) {161 path = "/​tmp/​" + fn;162 fd = open(path);163 }164 /​/​ Check that the file owner/​permission to avoid attaching to165 /​/​ bogus process166 try {167 checkPermissions(path);168 } catch (IOException ioe) {169 close(fd);170 throw ioe;171 }172 return fd;173 }174 /​/​ On Solaris/​Linux a simple handshake is used to start the attach mechanism175 /​/​ if not already started. The client creates a .attach_pid<pid> file in the176 /​/​ target VM's working directory (or /​tmp), and the SIGQUIT handler checks177 /​/​ for the file.178 private File createAttachFile(int pid) throws IOException {179 String fn = ".attach_pid" + pid;180 String path = "/​proc/​" + pid + "/​cwd/​" + fn;181 File f = new File(path);182 try {183 f.createNewFile();184 } catch (IOException x) {185 path = "/​tmp/​" + fn;186 f = new File(path);187 f.createNewFile();188 }189 return f;190 }191 /​/​-- native methods192 static native int open(String path) throws IOException;...

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createAttachFile

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1import java.io.IOException;2import java.lang.reflect.InvocationTargetException;3import java.lang.reflect.Method;4import java.nio.file.Path;5import java.nio.file.Paths;6import sun.tools.attach.SolarisVirtualMachine;7public class CreateAttachFile {8 public static void main(String[] args) throws IOException, NoSuchMethodException, SecurityException,9 IllegalAccessException, IllegalArgumentException, InvocationTargetException {10 String pid = "12345";11 Path path = Paths.get("/​tmp", "attach");12 SolarisVirtualMachine vm = new SolarisVirtualMachine(pid);13 Method method = vm.getClass().getDeclaredMethod("createAttachFile", Path.class);14 method.setAccessible(true);15 method.invoke(vm, path);16 }17}

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createAttachFile

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1import java.io.*;2import java.lang.management.*;3import java.lang.reflect.*;4import java.net.*;5import java.nio.file.*;6import java.util.*;7import java.util.stream.*;8public class Attach {9 public static void main(String[] args) throws Exception {10 String pid = args[0];11 String path = args[1];12 attach(pid, path);13 }14 private static void attach(String pid, String path) throws Exception {15 Class<?> clazz = Class.forName("sun.tools.attach.SolarisVirtualMachine");16 Constructor<?> constructor = clazz.getDeclaredConstructor(String.class);17 constructor.setAccessible(true);18 Object vm = constructor.newInstance(pid);19 Method attachMethod = clazz.getDeclaredMethod("attach");20 attachMethod.setAccessible(true);21 attachMethod.invoke(vm);22 Method createAttachFileMethod = clazz.getDeclaredMethod("createAttachFile", String.class);23 createAttachFileMethod.setAccessible(true);24 createAttachFileMethod.invoke(vm, path);25 }26}

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createAttachFile

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1import sun.tools.attach.SolarisVirtualMachine;2import java.io.File;3import java.io.IOException;4public class SolarisAttachFile {5 public static void main(String[] args) throws IOException {6 SolarisVirtualMachine vm = new SolarisVirtualMachine(args[0]);7 File file = new File(args[1]);8 vm.createAttachFile(file);9 }10}

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createAttachFile

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1import sun.tools.attach.SolarisVirtualMachine;2import java.io.File;3import java.io.IOException;4public class CreateAttachFile {5 public static void main(String[] args) throws IOException {6 File file = new File("attachfile");7 file.createNewFile();8 SolarisVirtualMachine vm = new SolarisVirtualMachine(1234);9 vm.createAttachFile(file);10 vm.detach();11 }12}

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createAttachFile

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1import sun.tools.attach.SolarisVirtualMachine;2import java.io.File;3public class CreateAttachFile {4 public static void main(String args[]) throws Exception {5 if (args.length != 1) {6 System.out.println("Usage: java CreateAttachFile <PID>");7 System.exit(1);8 }9 int pid = Integer.parseInt(args[0]);10 String attachFileName = "attach_" + pid;11 File attachFile = new File(attachFileName);12 if (attachFile.exists()) {13 System.out.println("Attach file " + attachFileName + " already exists");14 System.exit(1);15 }16 System.out.println("Creating attach file " + attachFileName + "...");17 SolarisVirtualMachine.createAttachFile(pid, attachFile);18 System.out.println("Attach file " + attachFileName + " created");19 }20}21import com.sun.tools.attach.*;22import java.io.*;23import java.util.*;24public class AttachTest {25 public static void main(String args[]) {26 if (args.length != 1) {27 System.out.println("Usage: java AttachTest <attach file name>");28 System.exit(1);29 }30 String attachFileName = args[0];31 File attachFile = new File(attachFileName);32 if (!attachFile.exists()) {33 System.out.println("Attach file " + attachFileName + " does not exist");34 System.exit(1);35 }36 System.out.println("Attaching to process in file " + attachFileName + "...");37 try {38 VirtualMachine vm = VirtualMachine.attach(attachFile);39 System.out.println("Attached to process in file " + attachFileName);40 String command = "jstack " + vm.id();41 System.out.println("Executing command: " +

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createAttachFile

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1import java.io.*;2import java.lang.reflect.*;3import sun.tools.attach.*;4public class InjectCode {5 public static void main(String[] args) throws Exception {6 String pid = args[0];7 String file = args[1];8 SolarisVirtualMachine vm = new SolarisVirtualMachine(Integer.parseInt(pid));9 long address = vm.createAttachFile(file);10 vm.attach();11 vm.detach();12 vm.deleteAttachFile(address);13 }14}

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createAttachFile

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1import sun.tools.attach.SolarisVirtualMachine;2import java.io.*;3import java.util.*;4import java.lang.reflect.*;5import java.util.Properties;6import java.lang.management.*;7import java.util.List;8import java.util.ArrayList;9import java.util.Map;10import java.util.HashMap;11import java.util.Set;12import java.util.HashSet;13import java.util.Collections;14import java.util.concurrent.TimeUnit;15import java.lang.Thread;16import java.util.concurrent.atomic.AtomicInteger;17public class AttachToProcess {18 public static void main(String[] args) throws Exception {19 String pid = args[0];20 String javaHome = args[1];21 String javaVersion = args[2];22 String javaVersion2 = args[3];23 System.out.println("java.version: " + System.getProperty("java.version"));24 SolarisVirtualMachine vm = SolarisVirtualMachine.attach(pid);25 Properties props = vm.getSystemProperties();26 System.out.println("props: " + props.getProperty("java.version"));27 vm.detach();28 System.out.println("java.version: " + System.getProperty("java.version"));29 }30}

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