gdb/python/py-newobjfileevent.c

   1 /* Python interface to new object file loading events.
   2
   3    Copyright (C) 2011-2017 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 extern PyTypeObject new_objfile_event_object_type
  24     CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
  25 extern PyTypeObject clear_objfiles_event_object_type
  26     CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
  27
  28 static PyObject *
  29 create_new_objfile_event_object (struct objfile *objfile)
  30 {
  31   PyObject *py_objfile;
  32
  33   gdbpy_ref objfile_event
  34     (create_event_object (&new_objfile_event_object_type));
  35   if (objfile_event == NULL)
  36     return NULL;
  37
  38   /* Note that objfile_to_objfile_object returns a borrowed reference,
  39      so we don't need a decref here.  */
  40   py_objfile = objfile_to_objfile_object (objfile);
  41   if (!py_objfile || evpy_add_attribute (objfile_event.get (),
  42                                          "new_objfile",
  43                                          py_objfile) < 0)
  44     return NULL;
  45
  46   return objfile_event.release ();
  47 }
  48
  49 /* Callback function which notifies observers when a new objfile event occurs.
  50    This function will create a new Python new_objfile event object.
  51    Return -1 if emit fails.  */
  52
  53 int
  54 emit_new_objfile_event (struct objfile *objfile)
  55 {
  56   if (evregpy_no_listeners_p (gdb_py_events.new_objfile))
  57     return 0;
  58
  59   gdbpy_ref event (create_new_objfile_event_object (objfile));
  60   if (event != NULL)
  61     return evpy_emit_event (event.get (), gdb_py_events.new_objfile);
  62   return -1;
  63 }
  64
  65 GDBPY_NEW_EVENT_TYPE (new_objfile,
  66                       "gdb.NewObjFileEvent",
  67                       "NewObjFileEvent",
  68                       "GDB new object file event object",
  69                       event_object_type);
  70 \f
  71 /* Subroutine of emit_clear_objfiles_event to simplify it.  */
  72
  73 static PyObject *
  74 create_clear_objfiles_event_object (void)
  75 {
  76   PyObject *py_progspace;
  77
  78   gdbpy_ref objfile_event
  79     (create_event_object (&clear_objfiles_event_object_type));
  80   if (objfile_event == NULL)
  81     return NULL;
  82
  83   /* Note that pspace_to_pspace_object returns a borrowed reference,
  84      so we don't need a decref here.  */
  85   py_progspace = pspace_to_pspace_object (current_program_space);
  86   if (!py_progspace || evpy_add_attribute (objfile_event.get (),
  87                                            "progspace",
  88                                            py_progspace) < 0)
  89     return NULL;
  90
  91   return objfile_event.release ();
  92 }
  93
  94 /* Callback function which notifies observers when the "clear objfiles"
  95    event occurs.
  96    This function will create a new Python clear_objfiles event object.
  97    Return -1 if emit fails.  */
  98
  99 int
 100 emit_clear_objfiles_event (void)
 101 {
 102   if (evregpy_no_listeners_p (gdb_py_events.clear_objfiles))
 103     return 0;
 104
 105   gdbpy_ref event (create_clear_objfiles_event_object ());
 106   if (event != NULL)
 107     return evpy_emit_event (event.get (), gdb_py_events.clear_objfiles);
 108   return -1;
 109 }
 110
 111 GDBPY_NEW_EVENT_TYPE (clear_objfiles,
 112                       "gdb.ClearObjFilesEvent",
 113                       "ClearObjFilesEvent",
 114                       "GDB clear object files event object",
 115                       event_object_type);