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Jython Interpreter

The Ghidra Jython Interpreter provides a full general-purpose Jython interactive shell and allows you to interact with your current Ghidra session by exposing Ghidra's powerful Java API through the magic of Jython.

Environment

The Ghidra Jython Interpreter is configured to run in a similar context as a Ghidra script. Therefore, you immediately have access to variables such as currentProgram, currentSelection, currentAddress, etc without needing to import them. These variables exist as Java objects behind the scenes, but Jython allows you to interact with them through a Python interface, which is similar to Java in some ways.

As in Java, classes outside of your current package/module need to be explicitly imported. For example, consider the following code snippet:

    # Get a data type from the user
    tool = state.getTool()
    dtm = currentProgram.getDataTypeManager()
    from ghidra.app.util.datatype import DataTypeSelectionDialog
    from ghidra.util.data.DataTypeParser import AllowedDataTypes
    selectionDialog = DataTypeSelectionDialog(tool, dtm, -1, AllowedDataTypes.FIXED_LENGTH)
    tool.showDialog(selectionDialog)
    dataType = selectionDialog.getUserChosenDataType()
    if dataType != None: print "Chosen data type: " + str(dataType)

currentProgram and state are defined within the Ghidra scripting class hierarchy, so nothing has to be explicitly imported before they can be used. However, because the DataTypeSelectionDialog class and AllowedDataType enum reside in different packages, they must be explicitly imported. Failure to do so will result in a Jython NameError.

Clear Erase16

This command clears the interpreter's display. Its effect is purely visual. It does not affect the state of the interpreter in any way.

Interrupt Dialog Cancel

This command issues a keyboard interrupt to the interpreter, which can be used to interrupt long running commands or loops.

Reset Reload3

This command resets the interpreter, which clears the display and resets all state.

Keybindings

The Ghidra Jython Interpreter supports the following hard-coded keybindings:

  • (up):  Move backward in command stack
  • (down):  Move forward in command stack
  • TAB:  Show code completion window

With the code completion window open:

  • TAB:  Insert currently-selected code completion (if no completion selected, select the first available)
  • ENTER:  Insert selected completion (if any) and close the completion window
  • (up):  Select previous code completion
  • (down):  Select next code completion
  • ESC:  Hide code completion window

Copy/Paste

Copy and paste from within the Ghidra Jython Interpreter should work as expected for your given environment:

  • Windows:  CTRL+C / CTRL+V
  • Linux:  CTRL+C / CTRL+V
  • OS X:  COMMAND+C / COMMAND+V

API Documentation

The built-in help() Jython function has been altered by the Ghidra Jython Interpreter to add support for displaying Ghidra's Javadoc (where available) for a given Ghidra class, method, or variable. For example, to see Ghidra's Javadoc on the state variable, simply do:

    >>> help(state)
    #####################################################
    class ghidra.app.script.GhidraState
      extends java.lang.Object

     Represents the current state of a Ghidra tool

    #####################################################

    PluginTool getTool()
       Returns the current tool.

      @return ghidra.framework.plugintool.PluginTool: the current tool

    -----------------------------------------------------
     Project getProject()
       Returns the current project.

       @return ghidra.framework.model.Project: the current project

    -----------------------------------------------------
    ...
    ...
    ...

Calling help() with no arguments will show the Javadoc for the GhidraScript class.

Note: It may be necessary to import a Ghidra class before calling the built-in help() Jython function on it. Failure to do so will result in a Jython NameError.

Additional Help

For more information on the Jython environment, such as how to interact with Java objects through a Python interface, please refer to Jython's free e-book which can be found on the Internet at *www.jython.org/jythonbook/en/1.0/*

Provided by: JythonPlugin

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