Allow Python notification of new object-file loadings.

* Makefile.in (SUBDIR_PYTHON_SRCS): Add py-newobjfilevent.c.
	(SUBDIR_PYTHON_OBS): Add py-newobjfileevent.o.
	Add build rule for this file.
	* python/py-event.h (emit_new_objfile_event): New prototype.
	(newobjfile): New Python event emitter.
	* python/py-evts.c (gdbpy_initialize_py_events): Add new_objfile to
	Python event registry.
	* python/py-inferior.c: Include objfiles.h
	(python_new_objfile): New function.
	(gdbpy_initialize_inferior): Add python_new_objfile to the new objfile
	observers.
	* python/py-newobjfileevent.c: New file.
	* python-internal.h (gdbpy_initialize_new_objfile_event): New
	prototype.
	* python/python.c (_initialize_python): Add
	gdbpy_initialize_new_objfile_event call.
	* NEWS: Add item for new Python event "gdb.newobjfile"

2011-10-06  Kevin Pouget  <kevin.pouget@st.com>

	Allow Python notification of new object-file loadings.
	* gdb.texinfo (Events In Python): Document `gdb.NewObjFileEvent'
	event type.

2011-10-06  Kevin Pouget  <kevin.pouget@st.com>

	Allow Python notification of new object-file loadings.
	* gdb.python/py-events.exp: Test newobjfile event.
	* gdb.python/py-events.py: Register newobjfile callback.
	* gdb.python/py-events.c: Add call to shared library
	* gdb.python/py-events-shlib.c: New file.

gdb/python/py-event.h

@@ -111,6 +111,7 @@ extern int evpy_emit_event (PyObject *event,
 
 extern PyObject *create_event_object (PyTypeObject *py_type);
 extern PyObject *create_thread_event_object (PyTypeObject *py_type);
+extern int emit_new_objfile_event (struct objfile *objfile);
 
 extern void evpy_dealloc (PyObject *self);
 extern int evpy_add_attribute (PyObject *event,

gdb/python/py-events.h

@@ -45,6 +45,7 @@ typedef struct
   eventregistry_object *stop;
   eventregistry_object *cont;
   eventregistry_object *exited;
+  eventregistry_object *new_objfile;
 
   PyObject *module;
 

gdb/python/py-evts.c

@@ -58,6 +58,9 @@ gdbpy_initialize_py_events (void)
   if (add_new_registry (&gdb_py_events.exited, "exited") < 0)
     goto fail;
 
+  if (add_new_registry (&gdb_py_events.new_objfile, "new_objfile") < 0)
+    goto fail;
+
   Py_INCREF (gdb_py_events.module);
   if (PyModule_AddObject (gdb_module,
                           "events",

gdb/python/py-inferior.c

@@ -22,6 +22,7 @@
 #include "gdbcore.h"
 #include "gdbthread.h"
 #include "inferior.h"
+#include "objfiles.h"
 #include "observer.h"
 #include "python-internal.h"
 #include "arch-utils.h"
@@ -125,6 +126,25 @@ python_inferior_exit (struct inferior *inf)
   do_cleanups (cleanup);
 }
 
+/* Callback used to notify Python listeners about new objfiles loaded in the
+   inferior.  */
+
+static void
+python_new_objfile (struct objfile *objfile)
+{
+  struct cleanup *cleanup;
+
+  if (objfile == NULL)
+    return;
+
+  cleanup = ensure_python_env (get_objfile_arch (objfile), current_language);
+
+  if (emit_new_objfile_event (objfile) < 0)
+    gdbpy_print_stack ();
+
+  do_cleanups (cleanup);
+}
+
 /* Return a reference to the Python object of type Inferior
    representing INFERIOR.  If the object has already been created,
    return it and increment the reference count,  otherwise, create it.
@@ -715,6 +735,7 @@ gdbpy_initialize_inferior (void)
   observer_attach_normal_stop (python_on_normal_stop);
   observer_attach_target_resumed (python_on_resume);
   observer_attach_inferior_exit (python_inferior_exit);
+  observer_attach_new_objfile (python_new_objfile);
 
   membuf_object_type.tp_new = PyType_GenericNew;
   if (PyType_Ready (&membuf_object_type) < 0)

gdb/python/python-internal.h

@@ -214,6 +214,7 @@ void gdbpy_initialize_breakpoint_event (void);
 void gdbpy_initialize_continue_event (void);
 void gdbpy_initialize_exited_event (void);
 void gdbpy_initialize_thread_event (void);
+void gdbpy_initialize_new_objfile_event (void);
 
 struct cleanup *make_cleanup_py_decref (PyObject *py);
 

gdb/python/python.c

@@ -1257,6 +1257,7 @@ Enables or disables printing of Python stack traces."),
   gdbpy_initialize_continue_event ();
   gdbpy_initialize_exited_event ();
   gdbpy_initialize_thread_event ();
+  gdbpy_initialize_new_objfile_event () ;
 
   observer_attach_before_prompt (before_prompt_hook);