mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
0b4fe76f95
Currently, Python code can use event registries to detect when gdb loads a new objfile, and when gdb clears the objfile list. However, there's no way to detect the removal of an objfile, say when the inferior calls dlclose. This patch adds a gdb.free_objfile event registry and arranges for an event to be emitted in this case.
128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/* Python interface to new object file loading events.
|
||
|
||
Copyright (C) 2011-2022 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"
|
||
|
||
static gdbpy_ref<>
|
||
create_new_objfile_event_object (struct objfile *objfile)
|
||
{
|
||
gdbpy_ref<> objfile_event
|
||
= create_event_object (&new_objfile_event_object_type);
|
||
if (objfile_event == NULL)
|
||
return NULL;
|
||
|
||
gdbpy_ref<> py_objfile = objfile_to_objfile_object (objfile);
|
||
if (py_objfile == NULL || evpy_add_attribute (objfile_event.get (),
|
||
"new_objfile",
|
||
py_objfile.get ()) < 0)
|
||
return NULL;
|
||
|
||
return objfile_event;
|
||
}
|
||
|
||
/* Callback function which notifies observers when a new objfile event occurs.
|
||
This function will create a new Python new_objfile event object.
|
||
Return -1 if emit fails. */
|
||
|
||
int
|
||
emit_new_objfile_event (struct objfile *objfile)
|
||
{
|
||
if (evregpy_no_listeners_p (gdb_py_events.new_objfile))
|
||
return 0;
|
||
|
||
gdbpy_ref<> event = create_new_objfile_event_object (objfile);
|
||
if (event != NULL)
|
||
return evpy_emit_event (event.get (), gdb_py_events.new_objfile);
|
||
return -1;
|
||
}
|
||
|
||
/* Create an event object representing a to-be-freed objfile. Return
|
||
nullptr, with the Python exception set, on error. */
|
||
|
||
static gdbpy_ref<>
|
||
create_free_objfile_event_object (struct objfile *objfile)
|
||
{
|
||
gdbpy_ref<> objfile_event
|
||
= create_event_object (&free_objfile_event_object_type);
|
||
if (objfile_event == nullptr)
|
||
return nullptr;
|
||
|
||
gdbpy_ref<> py_objfile = objfile_to_objfile_object (objfile);
|
||
if (py_objfile == nullptr
|
||
|| evpy_add_attribute (objfile_event.get (), "objfile",
|
||
py_objfile.get ()) < 0)
|
||
return nullptr;
|
||
|
||
return objfile_event;
|
||
}
|
||
|
||
/* Callback function which notifies observers when a free objfile
|
||
event occurs. This function will create a new Python event object.
|
||
Return -1 if emit fails. */
|
||
|
||
int
|
||
emit_free_objfile_event (struct objfile *objfile)
|
||
{
|
||
if (evregpy_no_listeners_p (gdb_py_events.free_objfile))
|
||
return 0;
|
||
|
||
gdbpy_ref<> event = create_free_objfile_event_object (objfile);
|
||
if (event == nullptr)
|
||
return -1;
|
||
return evpy_emit_event (event.get (), gdb_py_events.free_objfile);
|
||
}
|
||
|
||
|
||
/* Subroutine of emit_clear_objfiles_event to simplify it. */
|
||
|
||
static gdbpy_ref<>
|
||
create_clear_objfiles_event_object (void)
|
||
{
|
||
gdbpy_ref<> objfile_event
|
||
= create_event_object (&clear_objfiles_event_object_type);
|
||
if (objfile_event == NULL)
|
||
return NULL;
|
||
|
||
gdbpy_ref<> py_progspace = pspace_to_pspace_object (current_program_space);
|
||
if (py_progspace == NULL || evpy_add_attribute (objfile_event.get (),
|
||
"progspace",
|
||
py_progspace.get ()) < 0)
|
||
return NULL;
|
||
|
||
return objfile_event;
|
||
}
|
||
|
||
/* 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)
|
||
{
|
||
if (evregpy_no_listeners_p (gdb_py_events.clear_objfiles))
|
||
return 0;
|
||
|
||
gdbpy_ref<> event = create_clear_objfiles_event_object ();
|
||
if (event != NULL)
|
||
return evpy_emit_event (event.get (), gdb_py_events.clear_objfiles);
|
||
return -1;
|
||
}
|