Add enable_debugger() and disable_debugger() to Session

The underlying implementation defaults to port 5858, which is the
default Node.js debugger port. Pass the `port` keyword argument to
override it:

```python
session.enable_debugger(port=1337)
```

src/_frida.c

@@ -152,6 +152,8 @@ static int PySession_init (PySession * self);
 static void PySession_dealloc (PySession * self);
 static PyObject * PySession_detach (PySession * self);
 static PyObject * PySession_create_script (PySession * self, PyObject * args, PyObject * kw);
+static PyObject * PySession_enable_debugger (PySession * self, PyObject * args, PyObject * kw);
+static PyObject * PySession_disable_debugger (PySession * self, PyObject * args);
 static PyObject * PySession_on (PySession * self, PyObject * args);
 static PyObject * PySession_off (PySession * self, PyObject * args);
 static void PySession_on_detached (PySession * self, FridaSession * handle);
@@ -226,6 +228,8 @@ static PyMethodDef PySession_methods[] =
 {
   { "detach", (PyCFunction) PySession_detach, METH_NOARGS, "Detach session from the process." },
   { "create_script", (PyCFunction) PySession_create_script, METH_VARARGS | METH_KEYWORDS, "Create a new script." },
+  { "enable_debugger", (PyCFunction) PySession_enable_debugger, METH_VARARGS | METH_KEYWORDS, "Enable the Node.js compatible script debugger." },
+  { "disable_debugger", (PyCFunction) PySession_disable_debugger, METH_VARARGS, "Disable the Node.js compatible script debugger." },
   { "on", (PyCFunction) PySession_on, METH_VARARGS, "Add an event handler." },
   { "off", (PyCFunction) PySession_off, METH_VARARGS, "Remove an event handler." },
   { NULL }
@@ -1181,6 +1185,47 @@ PySession_create_script (PySession * self, PyObject * args, PyObject * kw)
   return PyScript_from_handle (handle);
 }
 
+static PyObject *
+PySession_enable_debugger (PySession * self, PyObject * args, PyObject * kw)
+{
+  static char * keywords[] = { "port", NULL };
+  unsigned short int port = 0;
+  GError * error = NULL;
+
+  if (!PyArg_ParseTupleAndKeywords (args, kw, "|H", keywords, &port))
+    return NULL;
+
+  Py_BEGIN_ALLOW_THREADS
+  frida_session_enable_debugger_sync (self->handle, port, &error);
+  Py_END_ALLOW_THREADS
+  if (error != NULL)
+  {
+    PyErr_SetString (PyExc_SystemError, error->message);
+    g_error_free (error);
+    return NULL;
+  }
+
+  Py_RETURN_NONE;
+}
+
+static PyObject *
+PySession_disable_debugger (PySession * self, PyObject * args)
+{
+  GError * error = NULL;
+
+  Py_BEGIN_ALLOW_THREADS
+  frida_session_disable_debugger_sync (self->handle, &error);
+  Py_END_ALLOW_THREADS
+  if (error != NULL)
+  {
+    PyErr_SetString (PyExc_SystemError, error->message);
+    g_error_free (error);
+    return NULL;
+  }
+
+  Py_RETURN_NONE;
+}
+
 static PyObject *
 PySession_on (PySession * self, PyObject * args)
 {

src/frida/core.py

@@ -183,6 +183,12 @@ recv(function (string) {
     def create_script(self, source, **kwargs):
         return self._impl.create_script(source, **kwargs)
 
+    def enable_debugger(self, **kwargs):
+        return self._impl.enable_debugger(**kwargs)
+
+    def disable_debugger(self):
+        return self._impl.disable_debugger()
+
     def on(self, signal, callback):
         self._impl.on(signal, callback)