gdb/python/py-newobjfileevent.c

   1 /* Python interface to new object file loading events.
   2
   3    Copyright (C) 2011-2016 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 *objfile_event;
  32   PyObject *py_objfile;
  33
  34   objfile_event = create_event_object (&new_objfile_event_object_type);
  35   if (!objfile_event)
  36     goto fail;
  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,
  42                                          "new_objfile",
  43                                          py_objfile) < 0)
  44     goto fail;
  45
  46   return objfile_event;
  47
  48  fail:
  49   Py_XDECREF (objfile_event);
  50   return NULL;
  51 }
  52
  53 /* Callback function which notifies observers when a new objfile event occurs.
  54    This function will create a new Python new_objfile event object.
  55    Return -1 if emit fails.  */
  56
  57 int
  58 emit_new_objfile_event (struct objfile *objfile)
  59 {
  60   PyObject *event;
  61
  62   if (evregpy_no_listeners_p (gdb_py_events.new_objfile))
  63     return 0;
  64
  65   event = create_new_objfile_event_object (objfile);
  66   if (event)
  67     return evpy_emit_event (event, gdb_py_events.new_objfile);
  68   return -1;
  69 }
  70
  71 GDBPY_NEW_EVENT_TYPE (new_objfile,
  72                       "gdb.NewObjFileEvent",
  73                       "NewObjFileEvent",
  74                       "GDB new object file event object",
  75                       event_object_type);
  76 \f
  77 /* Subroutine of emit_clear_objfiles_event to simplify it.  */
  78
  79 static PyObject *
  80 create_clear_objfiles_event_object (void)
  81 {
  82   PyObject *objfile_event;
  83   PyObject *py_progspace;
  84
  85   objfile_event = create_event_object (&clear_objfiles_event_object_type);
  86   if (!objfile_event)
  87     goto fail;
  88
  89   /* Note that pspace_to_pspace_object returns a borrowed reference,
  90      so we don't need a decref here.  */
  91   py_progspace = pspace_to_pspace_object (current_program_space);
  92   if (!py_progspace || evpy_add_attribute (objfile_event,
  93                                            "progspace",
  94                                            py_progspace) < 0)
  95     goto fail;
  96
  97   return objfile_event;
  98
  99  fail:
 100   Py_XDECREF (objfile_event);
 101   return NULL;
 102 }
 103
 104 /* Callback function which notifies observers when the "clear objfiles"
 105    event occurs.
 106    This function will create a new Python clear_objfiles event object.
 107    Return -1 if emit fails.  */
 108
 109 int
 110 emit_clear_objfiles_event (void)
 111 {
 112   PyObject *event;
 113
 114   if (evregpy_no_listeners_p (gdb_py_events.clear_objfiles))
 115     return 0;
 116
 117   event = create_clear_objfiles_event_object ();
 118   if (event)
 119     return evpy_emit_event (event, gdb_py_events.clear_objfiles);
 120   return -1;
 121 }
 122
 123 GDBPY_NEW_EVENT_TYPE (clear_objfiles,
 124                       "gdb.ClearObjFilesEvent",
 125                       "ClearObjFilesEvent",
 126                       "GDB clear object files event object",
 127                       event_object_type);