gdb/python/py-newobjfileevent.c

   1 /* Python interface to new object file loading events.
   2
   3    Copyright (C) 2011-2018 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "py-event.h"
  22
  23 static PyObject *
  24 create_new_objfile_event_object (struct objfile *objfile)
  25 {
  26   PyObject *py_objfile;
  27
  28   gdbpy_ref<> objfile_event
  29     (create_event_object (&new_objfile_event_object_type));
  30   if (objfile_event == NULL)
  31     return NULL;
  32
  33   /* Note that objfile_to_objfile_object returns a borrowed reference,
  34      so we don't need a decref here.  */
  35   py_objfile = objfile_to_objfile_object (objfile);
  36   if (!py_objfile || evpy_add_attribute (objfile_event.get (),
  37                                          "new_objfile",
  38                                          py_objfile) < 0)
  39     return NULL;
  40
  41   return objfile_event.release ();
  42 }
  43
  44 /* Callback function which notifies observers when a new objfile event occurs.
  45    This function will create a new Python new_objfile event object.
  46    Return -1 if emit fails.  */
  47
  48 int
  49 emit_new_objfile_event (struct objfile *objfile)
  50 {
  51   if (evregpy_no_listeners_p (gdb_py_events.new_objfile))
  52     return 0;
  53
  54   gdbpy_ref<> event (create_new_objfile_event_object (objfile));
  55   if (event != NULL)
  56     return evpy_emit_event (event.get (), gdb_py_events.new_objfile);
  57   return -1;
  58 }
  59
  60 \f
  61 /* Subroutine of emit_clear_objfiles_event to simplify it.  */
  62
  63 static PyObject *
  64 create_clear_objfiles_event_object (void)
  65 {
  66   PyObject *py_progspace;
  67
  68   gdbpy_ref<> objfile_event
  69     (create_event_object (&clear_objfiles_event_object_type));
  70   if (objfile_event == NULL)
  71     return NULL;
  72
  73   /* Note that pspace_to_pspace_object returns a borrowed reference,
  74      so we don't need a decref here.  */
  75   py_progspace = pspace_to_pspace_object (current_program_space);
  76   if (!py_progspace || evpy_add_attribute (objfile_event.get (),
  77                                            "progspace",
  78                                            py_progspace) < 0)
  79     return NULL;
  80
  81   return objfile_event.release ();
  82 }
  83
  84 /* Callback function which notifies observers when the "clear objfiles"
  85    event occurs.
  86    This function will create a new Python clear_objfiles event object.
  87    Return -1 if emit fails.  */
  88
  89 int
  90 emit_clear_objfiles_event (void)
  91 {
  92   if (evregpy_no_listeners_p (gdb_py_events.clear_objfiles))
  93     return 0;
  94
  95   gdbpy_ref<> event (create_clear_objfiles_event_object ());
  96   if (event != NULL)
  97     return evpy_emit_event (event.get (), gdb_py_events.clear_objfiles);
  98   return -1;
  99 }