code: @Override
      InputStream execute(String cmd, Object ... args) throws AgentLoadException, IOException {
          assert args.length <= 3;                // includes null
  
          // did we detach?
          String p;
          synchronized (this) {
              if (this.path == null) {
                  throw new IOException("Detached from target VM");
              }
              p = this.path;
          }
  
          // create UNIX socket
          int s = socket();
  
          // connect to target VM
          try {
              connect(s, p);
          } catch (IOException x) {
              close(s);
              throw x;
          }
  
          IOException ioe = null;
  
          // connected - write request
          // <ver> <cmd> <args...>
          try {
              writeString(s, PROTOCOL_VERSION);
              writeString(s, cmd);
  
              for (int i=0; i<3; i++) {
                  if (i < args.length && args[i] != null) {
                      writeString(s, (String)args[i]);
                  } else {
                      writeString(s, "");
                  }
              }
          } catch (IOException x) {
              ioe = x;
          }
  
  
          // Create an input stream to read reply
          SocketInputStream sis = new SocketInputStream(s);
  
          // Read the command completion status
          int completionStatus;
          try {
              completionStatus = readInt(sis);
          } catch (IOException x) {
              sis.close();
              if (ioe != null) {
                  throw ioe;
              } else {
                  throw x;
              }
          }
  
          if (completionStatus != 0) {
              sis.close();
  
              // In the event of a protocol mismatch then the target VM
              // returns a known error so that we can throw a reasonable
              // error.
              if (completionStatus == ATTACH_ERROR_BADVERSION) {
                  throw new IOException("Protocol mismatch with target VM");
              }
  
              // Special-case the "load" command so that the right exception is
              // thrown.
              if (cmd.equals("load")) {
                  throw new AgentLoadException("Failed to load agent library");
              } else {
                  throw new IOException("Command failed in target VM");
              }
          }
  
          // Return the input stream so that the command output can be read
          return sis;
      }
docs: Execute the given command in the target VM.