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/* Python interface to inferior function events.
Copyright (C) 2013-2021 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"
/* Construct either a gdb.InferiorCallPreEvent or a
gdb.InferiorCallPostEvent. */
static gdbpy_ref<>
create_inferior_call_event_object (inferior_call_kind flag, ptid_t ptid,
CORE_ADDR addr)
{
gdbpy_ref<> event;
switch (flag)
{
case INFERIOR_CALL_PRE:
event = create_event_object (&inferior_call_pre_event_object_type);
break;
case INFERIOR_CALL_POST:
event = 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 = gdb_py_object_from_ulongest (addr);
if (addr_obj == NULL)
return NULL;
if (evpy_add_attribute (event.get (), "address", addr_obj.get ()) < 0)
return NULL;
return event;
}
/* Construct a gdb.RegisterChangedEvent containing the affected
register number. */
static gdbpy_ref<>
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 = gdb_py_object_from_longest (regnum);
if (regnum_obj == NULL)
return NULL;
if (evpy_add_attribute (event.get (), "regnum", regnum_obj.get ()) < 0)
return NULL;
return event;
}
/* Construct a gdb.MemoryChangedEvent describing the extent of the
affected memory. */
static gdbpy_ref<>
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 = gdb_py_object_from_ulongest (addr);
if (addr_obj == NULL)
return NULL;
if (evpy_add_attribute (event.get (), "address", addr_obj.get ()) < 0)
return NULL;
gdbpy_ref<> len_obj = gdb_py_object_from_longest (len);
if (len_obj == NULL)
return NULL;
if (evpy_add_attribute (event.get (), "length", len_obj.get ()) < 0)
return NULL;
return event;
}
/* 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;
}
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