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New python event "clear_objfiles".

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If one is watching new_objfile events in python, it helps to know
when the list of objfiles is cleared.  This patch adds a new
clear_objfiles event to support this.

This patch is all just cut-n-paste-n-tweak derived from
the new_objfiles event.

gdb/ChangeLog:

	* NEWS: Mention new event gdb.clear_objfiles.
	* python/py-event.h (emit_clear_objfiles_event): Clear
	* python/py-events.h (events_object): New member clear_objfiles.
	* python/py-evts.c (gdbpy_initialize_py_events): Add clear_objfiles
	event.
	* python/py-inferior.c (python_new_objfile): If objfile is NULL,
	emit clear_objfiles event.
	* python/py-newobjfileevent.c (create_clear_objfiles_event_object): New
	function.
	(emit_clear_objfiles_event): New function.
	(clear_objfiles): New event.
	* python/python-internal.h (gdbpy_initialize_clear_objfiles_event):
	Declare.
	* python/python.c (_initialize_python): Call
	gdbpy_initialize_clear_objfiles_event.

gdb/doc/ChangeLog:

	* python.texi (Events In Python): Document clear_objfiles event.

gdb/testsuite/ChangeLog:

	* gdb.python/py-events.exp: Update expected output for clear_objfiles
	event.
	* gdb.python/py-events.py: Add clear_objfiles event.
This commit is contained in:
Doug Evans 2014-10-17 11:12:17 -07:00
parent d096d8c11e
commit 4ffbba72f3
14 changed files with 126 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

55
gdb/python/py-newobjfileevent.c
View file

@ -22,6 +22,8 @@
static PyTypeObject new_objfile_event_object_type
CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
static PyTypeObject clear_objfiles_event_object_type
CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
static PyObject *
create_new_objfile_event_object (struct objfile *objfile)
@ -72,3 +74,56 @@ GDBPY_NEW_EVENT_TYPE (new_objfile,
"GDB new object file event object",
event_object_type,
static);
/* Subroutine of emit_clear_objfiles_event to simplify it. */
static PyObject *
create_clear_objfiles_event_object (void)
{
PyObject *objfile_event;
PyObject *py_progspace;
objfile_event = create_event_object (&clear_objfiles_event_object_type);
if (!objfile_event)
goto fail;
/* Note that pspace_to_pspace_object returns a borrowed reference,
so we don't need a decref here. */
py_progspace = pspace_to_pspace_object (current_program_space);
if (!py_progspace || evpy_add_attribute (objfile_event,
"progspace",
py_progspace) < 0)
goto fail;
return objfile_event;
fail:
Py_XDECREF (objfile_event);
return NULL;
}
/* Callback function which notifies observers when the "clear objfiles"
event occurs.
This function will create a new Python clear_objfiles event object.
Return -1 if emit fails. */
int
emit_clear_objfiles_event (void)
{
PyObject *event;
if (evregpy_no_listeners_p (gdb_py_events.clear_objfiles))
return 0;
event = create_clear_objfiles_event_object ();
if (event)
return evpy_emit_event (event, gdb_py_events.clear_objfiles);
return -1;
}
GDBPY_NEW_EVENT_TYPE (clear_objfiles,
"gdb.ClearObjFilesEvent",
"ClearObjFilesEvent",
"GDB clear object files event object",
event_object_type,
static);