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/* Python interface to inferior function events.
Copyright (C) 2013-2017 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "py-event.h"
#include "py-ref.h"
extern PyTypeObject inferior_call_pre_event_object_type
CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
extern PyTypeObject inferior_call_post_event_object_type
CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
extern PyTypeObject register_changed_event_object_type
CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
extern PyTypeObject memory_changed_event_object_type
CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
/* Construct either a gdb.InferiorCallPreEvent or a
gdb.InferiorCallPostEvent. */
static PyObject *
create_inferior_call_event_object (inferior_call_kind flag, ptid_t ptid,
CORE_ADDR addr)
{
gdbpy_ref<> event;
int failed;
switch (flag)
{
case INFERIOR_CALL_PRE:
event.reset (create_event_object (&inferior_call_pre_event_object_type));
break;
case INFERIOR_CALL_POST:
event.reset (create_event_object (&inferior_call_post_event_object_type));
break;
default:
gdb_assert_not_reached ("invalid inferior_call_kind");
}
gdbpy_ref<> ptid_obj (gdbpy_create_ptid_object (ptid));
if (ptid_obj == NULL)
return NULL;
if (evpy_add_attribute (event.get (), "ptid", ptid_obj.get ()) < 0)
return NULL;
gdbpy_ref<> addr_obj (PyLong_FromLongLong (addr));
if (addr_obj == NULL)
return NULL;
if (evpy_add_attribute (event.get (), "address", addr_obj.get ()) < 0)
return NULL;
return event.release ();
}
/* Construct a gdb.RegisterChangedEvent containing the affected
register number. */
static PyObject *
create_register_changed_event_object (struct frame_info *frame,
int regnum)
{
gdbpy_ref<> event (create_event_object (®ister_changed_event_object_type));
if (event == NULL)
return NULL;
gdbpy_ref<> frame_obj (frame_info_to_frame_object (frame));
if (frame_obj == NULL)
return NULL;
if (evpy_add_attribute (event.get (), "frame", frame_obj.get ()) < 0)
return NULL;
gdbpy_ref<> regnum_obj (PyLong_FromLongLong (regnum));
if (regnum_obj == NULL)
return NULL;
if (evpy_add_attribute (event.get (), "regnum", regnum_obj.get ()) < 0)
return NULL;
return event.release ();
}
/* Construct a gdb.MemoryChangedEvent describing the extent of the
affected memory. */
static PyObject *
create_memory_changed_event_object (CORE_ADDR addr, ssize_t len)
{
gdbpy_ref<> event (create_event_object (&memory_changed_event_object_type));
if (event == NULL)
return NULL;
gdbpy_ref<> addr_obj (PyLong_FromLongLong (addr));
if (addr_obj == NULL)
return NULL;
if (evpy_add_attribute (event.get (), "address", addr_obj.get ()) < 0)
return NULL;
gdbpy_ref<> len_obj (PyLong_FromLong (len));
if (len_obj == NULL)
return NULL;
if (evpy_add_attribute (event.get (), "length", len_obj.get ()) < 0)
return NULL;
return event.release ();
}
/* Callback function which notifies observers when an event occurs which
calls a function in the inferior.
This function will create a new Python inferior-call event object.
Return -1 if emit fails. */
int
emit_inferior_call_event (inferior_call_kind flag, ptid_t thread,
CORE_ADDR addr)
{
if (evregpy_no_listeners_p (gdb_py_events.inferior_call))
return 0;
gdbpy_ref<> event (create_inferior_call_event_object (flag, thread, addr));
if (event != NULL)
return evpy_emit_event (event.get (), gdb_py_events.inferior_call);
return -1;
}
/* Callback when memory is modified by the user. This function will
create a new Python memory changed event object. */
int
emit_memory_changed_event (CORE_ADDR addr, ssize_t len)
{
if (evregpy_no_listeners_p (gdb_py_events.memory_changed))
return 0;
gdbpy_ref<> event (create_memory_changed_event_object (addr, len));
if (event != NULL)
return evpy_emit_event (event.get (), gdb_py_events.memory_changed);
return -1;
}
/* Callback when a register is modified by the user. This function
will create a new Python register changed event object. */
int
emit_register_changed_event (struct frame_info* frame, int regnum)
{
if (evregpy_no_listeners_p (gdb_py_events.register_changed))
return 0;
gdbpy_ref<> event (create_register_changed_event_object (frame, regnum));
if (event != NULL)
return evpy_emit_event (event.get (), gdb_py_events.register_changed);
return -1;
}
GDBPY_NEW_EVENT_TYPE (inferior_call_pre,
"gdb.InferiorCallPreEvent",
"InferiorCallPreEvent",
"GDB inferior function pre-call event object",
event_object_type);
GDBPY_NEW_EVENT_TYPE (inferior_call_post,
"gdb.InferiorCallPostEvent",
"InferiorCallPostEvent",
"GDB inferior function post-call event object",
event_object_type);
GDBPY_NEW_EVENT_TYPE (register_changed,
"gdb.RegisterChangedEvent",
"RegisterChangedEvent",
"GDB register change event object",
event_object_type);
GDBPY_NEW_EVENT_TYPE (memory_changed,
"gdb.MemoryChangedEvent",
"MemoryChangedEvent",
"GDB memory change event object",
event_object_type);
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