New python events: infcall, register/memory changed.

gdb/ChangeLog:

	* NEWS: Mention new Python events.
	* Makefile.in (SUBDIR_PYTHON_OBS): Add py-infevents.o.
	(SUBDIR_PYTHON_SRCS): Add py-infevents.c.
	(py-infevents.o): New rule.
	* doc/observer.texi (inferior_call_pre, inferior_call_post)
	(memory_changed, register_changed): New observers.
	* infcall.c (call_function_by_hand): Notify observer before and
	after inferior call.
	* python/py-event.h (inferior_call_kind): New enum.
	(emit_inferior_call_event): New prototype.
	(emit_register_changed_event): New prototype.
	(emit_memory_changed_event): New prototype.
	* python/py-events.h (events_object): New registries
	inferior_call, memory_changed and register_changed.
	* python/py-evts.c (gdbpy_initialize_py_events): Add the
	inferior_call, memory_changed and register_changed registries.
	* python/py-infevents.c: New.
	* python/py-inferior.c (python_on_inferior_call_pre)
	(python_on_inferior_call_post, python_on_register_change)
	(python_on_memory_change): New functions.
	(gdbpy_initialize_inferior): Attach python handler to new
	observers.
	* python/py-infthread.c(gdbpy_create_ptid_object): New.
	(thpy_get_ptid) Use gdbpy_create_ptid_object.
	* python/python-internal.h:
	(gdbpy_create_ptid_object)
	(gdbpy_initialize_inferior_call_pre_event)
	(gdbpy_initialize_inferior_call_post_event)
	(gdbpy_initialize_register_changed_event)
	(gdbpy_initialize_memory_changed_event): New prototypes.
	* python/python.c (_initialize_python): Initialize new events.
	* valops.c (value_assign): Notify register_changed observer.

gdb/doc/ChangeLog:

	* python.texi (Events In Python): Document new events
	InferiorCallPreEvent, InferiorCallPostEvent, MemoryChangedEvent
	and RegisterChangedEvent.

gdb/testsuite/ChangeLog:

	* gdb.python/py-events.py (inferior_call_handler): New.
	(register_changed_handler, memory_changed_handler): New.
	(test_events.invoke): Register new handlers.
	* gdb.python/py-events.exp: Add tests for inferior call,
	memory_changed and register_changed events.

1 files changed, 70 insertions, 0 deletions

diff --git a/gdb/python/py-inferior.c b/gdb/python/py-inferior.c
index 1b38d55..9af8173 100644
--- a/gdb/python/py-inferior.c
+++ b/gdb/python/py-inferior.c
@@ -116,6 +116,72 @@ python_on_resume (ptid_t ptid)
   do_cleanups (cleanup);
 }
 
+/* Callback, registered as an observer, that notifies Python listeners
+   when an inferior function call is about to be made. */
+
+static void
+python_on_inferior_call_pre (ptid_t thread, CORE_ADDR address)
+{
+  struct cleanup *cleanup;
+
+  cleanup = ensure_python_env (target_gdbarch (), current_language);
+
+  if (emit_inferior_call_event (INFERIOR_CALL_PRE, thread, address) < 0)
+    gdbpy_print_stack ();
+
+  do_cleanups (cleanup);
+}
+
+/* Callback, registered as an observer, that notifies Python listeners
+   when an inferior function call has completed. */
+
+static void
+python_on_inferior_call_post (ptid_t thread, CORE_ADDR address)
+{
+  struct cleanup *cleanup;
+
+  cleanup = ensure_python_env (target_gdbarch (), current_language);
+
+  if (emit_inferior_call_event (INFERIOR_CALL_POST, thread, address) < 0)
+    gdbpy_print_stack ();
+
+  do_cleanups (cleanup);
+}
+
+/* Callback, registered as an observer, that notifies Python listeners
+   when a part of memory has been modified by user action (eg via a
+   'set' command). */
+
+static void
+python_on_memory_change (struct inferior *inferior, CORE_ADDR addr, ssize_t len, const bfd_byte *data)
+{
+  struct cleanup *cleanup;
+
+  cleanup = ensure_python_env (target_gdbarch (), current_language);
+
+  if (emit_memory_changed_event (addr, len) < 0)
+    gdbpy_print_stack ();
+
+  do_cleanups (cleanup);
+}
+
+/* Callback, registered as an observer, that notifies Python listeners
+   when a register has been modified by user action (eg via a 'set'
+   command). */
+
+static void
+python_on_register_change (struct frame_info *frame, int regnum)
+{
+  struct cleanup *cleanup;
+
+  cleanup = ensure_python_env (target_gdbarch (), current_language);
+
+  if (emit_register_changed_event (frame, regnum) < 0)
+    gdbpy_print_stack ();
+
+  do_cleanups (cleanup);
+}
+
 static void
 python_inferior_exit (struct inferior *inf)
 {
@@ -802,6 +868,10 @@ gdbpy_initialize_inferior (void)
   observer_attach_thread_exit (delete_thread_object);
   observer_attach_normal_stop (python_on_normal_stop);
   observer_attach_target_resumed (python_on_resume);
+  observer_attach_inferior_call_pre (python_on_inferior_call_pre);
+  observer_attach_inferior_call_post (python_on_inferior_call_post);
+  observer_attach_memory_changed (python_on_memory_change);
+  observer_attach_register_changed (python_on_register_change);
   observer_attach_inferior_exit (python_inferior_exit);
   observer_attach_new_objfile (python_new_objfile);