2011-03-10 Phil Muldoon <pmuldoon@redhat.com>

* python/py-param.c (add_setshow_generic): Add set/show callback
	parameters.  Register Python object context.
	(get_show_value): New function.
	(get_set_value): New function.
	(call_doc_function): New function.
	(get_doc_string): Move behind get_show_value/get_set_value.

2011-03-10  Phil Muldoon  <pmuldoon@redhat.com>

	* gdb.texinfo (Parameters In Python): Document get_set_string and
	get_show_string methods.

2011-03-10  Phil Muldoon  <pmuldoon@redhat.com>

	* gdb.python/py-parameter.exp: Update tests to the new Python
	parameter API. Add "no documentation" test.  Add deprecated API
	backward compatibility test.

gdb/ChangeLog

@@ -1,3 +1,12 @@
+2011-03-10  Phil Muldoon  <pmuldoon@redhat.com>
+
+	* python/py-param.c (add_setshow_generic): Add set/show callback
+	parameters.  Register Python object context.
+	(get_show_value): New function.
+	(get_set_value): New function.
+	(call_doc_function): New function.
+	(get_doc_string): Move behind get_show_value/get_set_value.
+
 2011-03-10  Andreas Tobler  <andreast-list@fgznet.ch>
 
 	* fbsd-nat.c (fbsd_make_corefile_notes): Constify local `fname'.

gdb/doc/ChangeLog

@@ -1,3 +1,8 @@
+2011-03-10  Phil Muldoon  <pmuldoon@redhat.com>
+
+	* gdb.texinfo (Parameters In Python): Document get_set_string and
+	get_show_string methods.
+
 2011-02-28  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
 	* gdb.texinfo (Tracepoint Conditions): Fix missing parenthesis.

gdb/doc/gdb.texinfo

@@ -22418,6 +22418,22 @@ parameter.  It can be read and assigned to just as any other
 attribute.  @value{GDBN} does validation when assignments are made.
 @end defivar
 
+There are two methods that should be implemented in any
+@code{Parameter} class.  These are:
+
+@defop Operation {parameter} get_set_string self
+@value{GDBN} will call this method when a @var{parameter}'s value has
+been changed via the @code{set} API (for example, @kbd{set foo off}).
+The @code{value} attribute has already been populated with the new
+value and may be used in output.  This method must return a string.
+@end defop
+
+@defop Operation {parameter} get_show_string self svalue
+@value{GDBN} will call this method when a @var{parameter}'s
+@code{show} API has been invoked (for example, @kbd{show foo}).  The
+argument @code{svalue} receives the string representation of the
+current value.  This method must return a string.
+@end defop
 
 When a new parameter is defined, its type must be specified.  The
 available types are represented by constants defined in the @code{gdb}

gdb/python/py-param.c

@@ -26,6 +26,8 @@
 #include "gdbcmd.h"
 #include "cli/cli-decode.h"
 #include "completer.h"
+#include "language.h"
+#include "arch-utils.h"
 
 /* Parameter constants and their values.  */
 struct parm_constant
@@ -288,6 +290,164 @@ set_attr (PyObject *obj, PyObject *attr_name, PyObject *val)
   return PyObject_GenericSetAttr (obj, attr_name, val);
 }
 
+/* A helper function which returns a documentation string for an
+   object. */
+
+static char *
+get_doc_string (PyObject *object, PyObject *attr)
+{
+  char *result = NULL;
+
+  if (PyObject_HasAttr (object, attr))
+    {
+      PyObject *ds_obj = PyObject_GetAttr (object, attr);
+
+      if (ds_obj && gdbpy_is_string (ds_obj))
+	{
+	  result = python_string_to_host_string (ds_obj);
+	  if (result == NULL)
+	    gdbpy_print_stack ();
+	}
+      Py_XDECREF (ds_obj);
+    }
+  if (! result)
+    result = xstrdup (_("This command is not documented."));
+  return result;
+}
+
+/* Helper function which will execute a METHOD in OBJ passing the
+   argument ARG.  ARG can be NULL.  METHOD should return a Python
+   string.  If this function returns NULL, there has been an error and
+   the appropriate exception set.  */
+static char *
+call_doc_function (PyObject *obj, PyObject *method, PyObject *arg)
+{
+  char *data = NULL;
+  PyObject *result = PyObject_CallMethodObjArgs (obj, method, arg, NULL);
+
+  if (! result)
+    return NULL;
+
+  if (gdbpy_is_string (result))
+    {
+      data = python_string_to_host_string (result);
+      if (! data)
+	return NULL;
+    }
+  else
+    {
+      PyErr_SetString (PyExc_RuntimeError,
+		       _("Parameter must return a string value."));
+      return NULL;
+    }
+
+  return data;
+}
+
+/* A callback function that is registered against the respective
+   add_setshow_* set_doc prototype.  This function will either call
+   the Python function "get_set_string" or extract the Python
+   attribute "set_doc" and return the contents as a string.  If
+   neither exist, insert a string indicating the Parameter is not
+   documented.  */
+static void
+get_set_value (char *args, int from_tty,
+	       struct cmd_list_element *c)
+{
+  PyObject *obj = (PyObject *) get_cmd_context (c);
+  char *set_doc_string;
+  struct cleanup *cleanup = ensure_python_env (get_current_arch (),
+					       current_language);
+  PyObject *set_doc_func = PyString_FromString ("get_set_string");
+
+  if (! set_doc_func)
+    goto error;
+
+  make_cleanup_py_decref (set_doc_func);
+
+  if (PyObject_HasAttr (obj, set_doc_func))
+    {
+      set_doc_string = call_doc_function (obj, set_doc_func, NULL);
+      if (! set_doc_string)
+	goto error;
+    }
+  else
+    {
+      /* We have to preserve the existing < GDB 7.3 API.  If a
+	 callback function does not exist, then attempt to read the
+	 set_doc attribute.  */
+      set_doc_string  = get_doc_string (obj, set_doc_cst);
+    }
+
+  make_cleanup (xfree, set_doc_string);
+  fprintf_filtered (gdb_stdout, "%s\n", set_doc_string);
+
+  do_cleanups (cleanup);
+  return;
+
+ error:
+  gdbpy_print_stack ();
+  do_cleanups (cleanup);
+  return;
+}
+
+/* A callback function that is registered against the respective
+   add_setshow_* show_doc prototype.  This function will either call
+   the Python function "get_show_string" or extract the Python
+   attribute "show_doc" and return the contents as a string.  If
+   neither exist, insert a string indicating the Parameter is not
+   documented.  */
+static void
+get_show_value (struct ui_file *file, int from_tty,
+		struct cmd_list_element *c,
+		const char *value)
+{
+  PyObject *obj = (PyObject *) get_cmd_context (c);
+  char *show_doc_string = NULL;
+  struct cleanup *cleanup = ensure_python_env (get_current_arch (),
+					       current_language);
+  PyObject *show_doc_func = PyString_FromString ("get_show_string");
+
+  if (! show_doc_func)
+    goto error;
+
+  make_cleanup_py_decref (show_doc_func);
+
+  if (PyObject_HasAttr (obj, show_doc_func))
+    {
+      PyObject *val_obj = PyString_FromString (value);
+
+      if (! val_obj)
+	goto error;
+
+      make_cleanup_py_decref (val_obj);
+
+      show_doc_string = call_doc_function (obj, show_doc_func, val_obj);
+      if (! show_doc_string)
+	goto error;
+
+      make_cleanup (xfree, show_doc_string);
+
+      fprintf_filtered (file, "%s\n", show_doc_string);
+    }
+  else
+    {
+      /* We have to preserve the existing < GDB 7.3 API.  If a
+	 callback function does not exist, then attempt to read the
+	 show_doc attribute.  */
+      show_doc_string  = get_doc_string (obj, show_doc_cst);
+      make_cleanup (xfree, show_doc_string);
+      fprintf_filtered (file, "%s %s\n", show_doc_string, value);
+    }
+
+  do_cleanups (cleanup);
+  return;
+
+ error:
+  gdbpy_print_stack ();
+  do_cleanups (cleanup);
+  return;
+}
 
 
 /* A helper function that dispatches to the appropriate add_setshow
@@ -299,74 +459,98 @@ add_setshow_generic (int parmclass, enum command_class cmdclass,
 		     struct cmd_list_element **set_list,
 		     struct cmd_list_element **show_list)
 {
+  struct cmd_list_element *param = NULL;
+  char *tmp_name = NULL;
+
   switch (parmclass)
     {
     case var_boolean:
-      add_setshow_boolean_cmd (cmd_name, cmdclass, &self->value.intval,
+
-			       set_doc, show_doc, help_doc,
+      add_setshow_boolean_cmd (cmd_name, cmdclass,
-			       NULL, NULL, set_list, show_list);
+			       &self->value.intval, set_doc, show_doc,
+			       help_doc, get_set_value, get_show_value,
+			       set_list, show_list);
+
       break;
 
     case var_auto_boolean:
       add_setshow_auto_boolean_cmd (cmd_name, cmdclass,
 				    &self->value.autoboolval,
 				    set_doc, show_doc, help_doc,
-				    NULL, NULL, set_list, show_list);
+				    get_set_value, get_show_value,
+				    set_list, show_list);
       break;
 
     case var_uinteger:
-      add_setshow_uinteger_cmd (cmd_name, cmdclass, &self->value.uintval,
+      add_setshow_uinteger_cmd (cmd_name, cmdclass,
-				set_doc, show_doc, help_doc,
+				&self->value.uintval, set_doc, show_doc,
-				NULL, NULL, set_list, show_list);
+				help_doc, get_set_value, get_show_value,
+				set_list, show_list);
       break;
 
     case var_integer:
-      add_setshow_integer_cmd (cmd_name, cmdclass, &self->value.intval,
+      add_setshow_integer_cmd (cmd_name, cmdclass,
-			       set_doc, show_doc, help_doc,
+			       &self->value.intval, set_doc, show_doc,
-			       NULL, NULL, set_list, show_list);
+			       help_doc, get_set_value, get_show_value,
-      break;
+			       set_list, show_list); break;
 
     case var_string:
-      add_setshow_string_cmd (cmd_name, cmdclass, &self->value.stringval,
+      add_setshow_string_cmd (cmd_name, cmdclass,
-			      set_doc, show_doc, help_doc,
+			      &self->value.stringval, set_doc, show_doc,
-			      NULL, NULL, set_list, show_list);
+			      help_doc, get_set_value, get_show_value,
-      break;
+			      set_list, show_list); break;
 
     case var_string_noescape:
       add_setshow_string_noescape_cmd (cmd_name, cmdclass,
 				       &self->value.stringval,
 				       set_doc, show_doc, help_doc,
-				       NULL, NULL, set_list, show_list);
+				       get_set_value, get_show_value,
+				       set_list, show_list);
+
       break;
 
     case var_optional_filename:
       add_setshow_optional_filename_cmd (cmd_name, cmdclass,
-					 &self->value.stringval,
+					 &self->value.stringval, set_doc,
-					 set_doc, show_doc, help_doc,
+					 show_doc, help_doc, get_set_value,
-					 NULL, NULL, set_list, show_list);
+					 get_show_value, set_list,
+					 show_list);
       break;
 
     case var_filename:
-      add_setshow_filename_cmd (cmd_name, cmdclass, &self->value.stringval,
+      add_setshow_filename_cmd (cmd_name, cmdclass,
-				set_doc, show_doc, help_doc,
+				&self->value.stringval, set_doc, show_doc,
-				NULL, NULL, set_list, show_list);
+				help_doc, get_set_value, get_show_value,
-      break;
+				set_list, show_list); break;
 
     case var_zinteger:
-      add_setshow_zinteger_cmd (cmd_name, cmdclass, &self->value.intval,
+      add_setshow_zinteger_cmd (cmd_name, cmdclass,
-				set_doc, show_doc, help_doc,
+				&self->value.intval, set_doc, show_doc,
-				NULL, NULL, set_list, show_list);
+				help_doc, get_set_value, get_show_value,
+				set_list, show_list);
       break;
 
     case var_enum:
       add_setshow_enum_cmd (cmd_name, cmdclass, self->enumeration,
-			    &self->value.cstringval,
+			    &self->value.cstringval, set_doc, show_doc,
-			    set_doc, show_doc, help_doc,
+			    help_doc, get_set_value, get_show_value,
-			    NULL, NULL, set_list, show_list);
+			    set_list, show_list);
       /* Initialize the value, just in case.  */
       self->value.cstringval = self->enumeration[0];
       break;
     }
+
+  /* Lookup created parameter, and register Python object against the
+     parameter context.  Perform this task against both lists.  */
+  tmp_name = cmd_name;
+  param = lookup_cmd (&tmp_name, *show_list, "", 0, 1);
+  if (param)
+    set_cmd_context (param, self);
+
+  tmp_name = cmd_name;
+  param = lookup_cmd (&tmp_name, *set_list, "", 0, 1);
+  if (param)
+    set_cmd_context (param, self);
 }
 
 /* A helper which computes enum values.  Returns 1 on success.  Returns 0 on
@@ -434,29 +618,6 @@ compute_enum_values (parmpy_object *self, PyObject *enum_values)
   return 1;
 }
 
-/* A helper function which returns a documentation string for an
-   object.  */
-static char *
-get_doc_string (PyObject *object, PyObject *attr)
-{
-  char *result = NULL;
-
-  if (PyObject_HasAttr (object, attr))
-    {
-      PyObject *ds_obj = PyObject_GetAttr (object, attr);
-
-      if (ds_obj && gdbpy_is_string (ds_obj))
-	{
-	  result = python_string_to_host_string (ds_obj);
-	  if (result == NULL)
-	    gdbpy_print_stack ();
-	}
-    }
-  if (! result)
-    result = xstrdup (_("This command is not documented."));
-  return result;
-}
-
 /* Object initializer; sets up gdb-side structures for command.
 
    Use: __init__(NAME, CMDCLASS, PARMCLASS, [ENUM])

gdb/testsuite/ChangeLog

@@ -1,3 +1,9 @@
+2011-03-10  Phil Muldoon  <pmuldoon@redhat.com>
+
+	* gdb.python/py-parameter.exp: Update tests to the new Python
+	parameter API. Add "no documentation" test.  Add deprecated API
+	backward compatibility test.
+
 2011-03-09  Tom Tromey  <tromey@redhat.com>
 
 	* gdb.ada/catch_ex.exp: Use explicit gdb_test rather than

gdb/testsuite/gdb.python/py-parameter.exp

@@ -38,8 +38,15 @@ gdb_py_test_multiple "Simple gdb booleanparameter" \
    "python" "" \
    "class TestParam (gdb.Parameter):" "" \
    "   \"\"\"When enabled, test param does something useful. When disabled, does nothing.\"\"\"" "" \
-   "   show_doc = \"Show whether the state of the Test Parameter does something useful\"" ""\
+   "   show_doc = \"Show the state of the boolean test-param\"" ""\
-   "   set_doc = \"Set whether the state of the Test Parameter does something useful\"" "" \
+   "   set_doc = \"Set the state of the boolean test-param\"" "" \
+   "   def get_show_string (self, pvalue):" ""\
+   "      return \"The state of the Test Parameter is \" + pvalue" ""\
+   "   def get_set_string (self):" ""\
+   "      val = \"on\"" ""\
+   "      if (self.value == False):" ""\
+   "         val = \"off\"" ""\
+   "      return \"Test Parameter has been set to \" + val" ""\
    "   def __init__ (self, name):" "" \
    "      super (TestParam, self).__init__ (name, gdb.COMMAND_DATA, gdb.PARAM_BOOLEAN)" "" \
    "      self.value = True" "" \
@@ -47,13 +54,14 @@ gdb_py_test_multiple "Simple gdb booleanparameter" \
    "end"
 
 gdb_test "python print test_param.value" "True" "Test parameter value"
-gdb_test "show print test-param" "Whether the state of the Test Parameter does something useful is on.*" "Show parameter on"
+gdb_test "show print test-param" "The state of the Test Parameter is on.*" "Show parameter on"
-gdb_py_test_silent_cmd "set print test-param off" "Turn off parameter" 1
+gdb_test "set print test-param off" "Test Parameter has been set to off" "Turn off parameter"
-gdb_test "show print test-param" "Whether the state of the Test Parameter does something useful is off.*" "Show parameter off"
+gdb_test "show print test-param" "The state of the Test Parameter is off.*" "Show parameter off"
 gdb_test "python print test_param.value" "False" "Test parameter value"
-gdb_test "help show print test-param" "Show whether the state of the Test Parameter does something useful.*" "Test show help"
+gdb_test "help show print test-param" "Show the state of the boolean test-param.*" "Test show help"
-gdb_test "help set print test-param" "Set whether the state of the Test Parameter does something useful.*" "Test set help"
+gdb_test "help set print test-param" "Set the state of the boolean test-param.*" "Test set help"
-gdb_test "help set print" "set print test-param -- Set whether the state of the Test Parameter.*" "Test general help"
+gdb_test "help set print" "set print test-param -- Set the state of the boolean test-param.*" "Test general help"
+
 
 # Test an enum parameter.
 gdb_py_test_multiple "enum gdb parameter" \
@@ -62,6 +70,10 @@ gdb_py_test_multiple "enum gdb parameter" \
    "   \"\"\"When set, test param does something useful. When disabled, does nothing.\"\"\"" "" \
    "   show_doc = \"Show the state of the enum\"" ""\
    "   set_doc = \"Set the state of the enum\"" "" \
+   "   def get_show_string (self, pvalue):" ""\
+   "      return \"The state of the enum is \" + pvalue" ""\
+   "   def get_set_string (self):" ""\
+   "      return \"The state of the enum has been set to \" + self.value" ""\
    "   def __init__ (self, name):" "" \
    "      super (TestEnumParam, self).__init__ (name, gdb.COMMAND_DATA, gdb.PARAM_ENUM, \[\"one\", \"two\"\])" "" \
    "      self.value = \"one\"" "" \
@@ -69,9 +81,9 @@ gdb_py_test_multiple "enum gdb parameter" \
    "end"
 
 gdb_test "python print test_enum_param.value" "one" "Test enum parameter value"
-gdb_test "show print test-enum-param" "The state of the enum is \"one\".*" "Show parameter is initial value"
+gdb_test "show print test-enum-param" "The state of the enum is one.*" "Show parameter is initial value"
-gdb_py_test_silent_cmd "set print test-enum-param two" "Set parameter to enum value" 1
+gdb_test "set print test-enum-param two" "The state of the enum has been set to two" "Set enum to two"
-gdb_test "show print test-enum-param" "The state of the enum is \"two\".*" "Show parameter is new value"
+gdb_test "show print test-enum-param" "The state of the enum is two.*" "Show parameter is new value"
 gdb_test "python print test_enum_param.value" "two" "Test enum parameter value"
 gdb_test "set print test-enum-param three" "Undefined item: \"three\".*" "Set invalid enum parameter" 
 
@@ -82,6 +94,10 @@ gdb_py_test_multiple "file gdb parameter" \
    "   \"\"\"When set, test param does something useful. When disabled, does nothing.\"\"\"" "" \
    "   show_doc = \"Show the name of the file\"" ""\
    "   set_doc = \"Set the name of the file\"" "" \
+   "   def get_show_string (self, pvalue):" ""\
+   "      return \"The name of the file is \" + pvalue" ""\
+   "   def get_set_string (self):" ""\
+   "      return \"The name of the file has been changed to \" + self.value" ""\
    "   def __init__ (self, name):" "" \
    "      super (TestFileParam, self).__init__ (name, gdb.COMMAND_FILES, gdb.PARAM_FILENAME)" "" \
    "      self.value = \"foo.txt\"" "" \
@@ -89,28 +105,73 @@ gdb_py_test_multiple "file gdb parameter" \
    "end"
 
 gdb_test "python print test_file_param.value" "foo.txt" "Test file parameter value"
-gdb_test "show test-file-param" "The name of the file is \"foo.txt\".*" "Show initial file value"
+gdb_test "show test-file-param" "The name of the file is foo.txt.*" "Show initial file value"
-gdb_py_test_silent_cmd "set test-file-param bar.txt" "Set new file parameter" 1
+gdb_test "set test-file-param bar.txt" "The name of the file has been changed to bar.txt" "Set new file parameter" 1
-gdb_test "show test-file-param" "The name of the file is \"bar.txt\".*" "Show new file value"
+gdb_test "show test-file-param" "The name of the file is bar.txt.*" "Show new file value"
 gdb_test "python print test_file_param.value" "bar.txt" "Test new file parameter value"
 gdb_test "set test-file-param" "Argument required.*" 
 
-# Test a file parameter.
+# Test a parameter that is not documented.
-gdb_py_test_multiple "file gdb parameter" \
+gdb_py_test_multiple "Simple gdb booleanparameter" \
    "python" "" \
-   "class TestFileParam (gdb.Parameter):" "" \
+   "class TestUndocParam (gdb.Parameter):" "" \
-   "   \"\"\"When set, test param does something useful. When disabled, does nothing.\"\"\"" "" \
+   "   def get_show_string (self, pvalue):" ""\
-   "   show_doc = \"Show the name of the file\"" ""\
+   "      return \"The state of the Test Parameter is \" + pvalue" ""\
-   "   set_doc = \"Set the name of the file\"" "" \
+   "   def get_set_string (self):" ""\
+   "      val = \"on\"" ""\
+   "      if (self.value == False):" ""\
+   "         val = \"off\"" ""\
+   "      return \"Test Parameter has been set to \" + val" ""\
    "   def __init__ (self, name):" "" \
-   "      super (TestFileParam, self).__init__ (name, gdb.COMMAND_FILES, gdb.PARAM_FILENAME)" "" \
+   "      super (TestUndocParam, self).__init__ (name, gdb.COMMAND_DATA, gdb.PARAM_BOOLEAN)" "" \
-   "      self.value = \"foo.txt\"" "" \
+   "      self.value = True" "" \
-   "test_file_param = TestFileParam ('test-file-param')" ""\
+   "test_undoc_param = TestUndocParam ('print test-undoc-param')" ""\
    "end"
 
-gdb_test "python print test_file_param.value" "foo.txt" "Test parameter value"
+gdb_test "show print test-undoc-param" "The state of the Test Parameter is on.*" "Show parameter on"
-gdb_test "show test-file-param" "The name of the file is \"foo.txt\".*" "Show parameter on"
+gdb_test "set print test-undoc-param off" "Test Parameter has been set to off" "Turn off parameter"
-gdb_py_test_silent_cmd "set test-file-param bar.txt" "Turn off parameter" 1
+gdb_test "show print test-undoc-param" "The state of the Test Parameter is off.*" "Show parameter off"
-gdb_test "show test-file-param" "The name of the file is \"bar.txt\".*" "Show parameter on"
+gdb_test "python print test_undoc_param.value" "False" "Test parameter value"
-gdb_test "python print test_file_param.value" "bar.txt" "Test parameter value"
+gdb_test "help show print test-undoc-param" "This command is not documented.*" "Test show help"
-gdb_test "set test-file-param" "Argument required.*" 
+gdb_test "help set print test-undoc-param" "This command is not documented.*" "Test set help"
+gdb_test "help set print" "set print test-undoc-param -- This command is not documented.*" "Test general help"
+
+# Test a parameter that is not documented in any way..
+gdb_py_test_multiple "Simple gdb booleanparameter" \
+   "python" "" \
+   "class TestNodocParam (gdb.Parameter):" "" \
+   "   def __init__ (self, name):" "" \
+   "      super (TestNodocParam, self).__init__ (name, gdb.COMMAND_DATA, gdb.PARAM_BOOLEAN)" "" \
+   "      self.value = True" "" \
+   "test_nodoc_param = TestNodocParam ('print test-nodoc-param')" ""\
+   "end"
+
+gdb_test "show print test-nodoc-param" "This command is not documented.*" "Show parameter on"
+gdb_test "set print test-nodoc-param off" "This command is not documented.*" "Turn off parameter"
+gdb_test "show print test-nodoc-param" "This command is not documented.*.*" "Show parameter off"
+gdb_test "python print test_nodoc_param.value" "False" "Test parameter value"
+gdb_test "help show print test-nodoc-param" "This command is not documented.*" "Test show help"
+gdb_test "help set print test-nodoc-param" "This command is not documented.*" "Test set help"
+gdb_test "help set print" "set print test-nodoc-param -- This command is not documented.*" "Test general help"
+
+# Test deprecated API. Do not use in your own implementations.
+gdb_py_test_multiple "Simple gdb booleanparameter" \
+   "python" "" \
+   "class TestParam (gdb.Parameter):" "" \
+   "   \"\"\"When enabled, test param does something useful. When disabled, does nothing.\"\"\"" "" \
+   "   show_doc = \"State of the Test Parameter\"" ""\
+   "   set_doc = \"Set the state of the Test Parameter\"" "" \
+   "   def __init__ (self, name):" "" \
+   "      super (TestParam, self).__init__ (name, gdb.COMMAND_DATA, gdb.PARAM_BOOLEAN)" "" \
+   "      self.value = True" "" \
+   "test_param = TestParam ('print test-param')" ""\
+   "end"
+
+gdb_test "python print test_param.value" "True" "Test parameter value"
+gdb_test "show print test-param" "State of the Test Parameter on.*" "Show parameter on"
+gdb_test "set print test-param off" "Set the state of the Test Parameter.*" "Turn off parameter"
+gdb_test "show print test-param" "State of the Test Parameter off.*" "Show parameter off"
+gdb_test "python print test_param.value" "False" "Test parameter value"
+gdb_test "help show print test-param" "State of the Test Parameter.*" "Test show help"
+gdb_test "help set print test-param" "Set the state of the Test Parameter.*" "Test set help"
+gdb_test "help set print" "set print test-param -- Set the state of the Test Parameter.*" "Test general help"