1 /* Python interface to objfiles. 2 3 Copyright (C) 2008, 2009 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 "python-internal.h" 22 #include "charset.h" 23 #include "objfiles.h" 24 #include "language.h" 25 26 typedef struct 27 { 28 PyObject_HEAD 29 30 /* The corresponding objfile. */ 31 struct objfile *objfile; 32 33 /* The pretty-printer list of functions. */ 34 PyObject *printers; 35 } objfile_object; 36 37 static PyTypeObject objfile_object_type; 38 39 static const struct objfile_data *objfpy_objfile_data_key; 40 41 42 43 /* An Objfile method which returns the objfile's file name, or None. */ 44 static PyObject * 45 objfpy_get_filename (PyObject *self, void *closure) 46 { 47 objfile_object *obj = (objfile_object *) self; 48 if (obj->objfile && obj->objfile->name) 49 return PyString_Decode (obj->objfile->name, strlen (obj->objfile->name), 50 host_charset (), NULL); 51 Py_RETURN_NONE; 52 } 53 54 static void 55 objfpy_dealloc (PyObject *o) 56 { 57 objfile_object *self = (objfile_object *) o; 58 Py_XDECREF (self->printers); 59 self->ob_type->tp_free ((PyObject *) self); 60 } 61 62 static PyObject * 63 objfpy_new (PyTypeObject *type, PyObject *args, PyObject *keywords) 64 { 65 objfile_object *self = (objfile_object *) type->tp_alloc (type, 0); 66 if (self) 67 { 68 self->objfile = NULL; 69 70 self->printers = PyList_New (0); 71 if (!self->printers) 72 { 73 Py_DECREF (self); 74 return NULL; 75 } 76 } 77 return (PyObject *) self; 78 } 79 80 PyObject * 81 objfpy_get_printers (PyObject *o, void *ignore) 82 { 83 objfile_object *self = (objfile_object *) o; 84 Py_INCREF (self->printers); 85 return self->printers; 86 } 87 88 static int 89 objfpy_set_printers (PyObject *o, PyObject *value, void *ignore) 90 { 91 PyObject *tmp; 92 objfile_object *self = (objfile_object *) o; 93 if (! value) 94 { 95 PyErr_SetString (PyExc_TypeError, 96 "cannot delete the pretty_printers attribute"); 97 return -1; 98 } 99 100 if (! PyList_Check (value)) 101 { 102 PyErr_SetString (PyExc_TypeError, 103 "the pretty_printers attribute must be a list"); 104 return -1; 105 } 106 107 /* Take care in case the LHS and RHS are related somehow. */ 108 tmp = self->printers; 109 Py_INCREF (value); 110 self->printers = value; 111 Py_XDECREF (tmp); 112 113 return 0; 114 } 115 116 117 118 /* Clear the OBJFILE pointer in an Objfile object and remove the 119 reference. */ 120 static void 121 py_free_objfile (struct objfile *objfile, void *datum) 122 { 123 struct cleanup *cleanup; 124 objfile_object *object = datum; 125 126 cleanup = ensure_python_env (get_objfile_arch (objfile), current_language); 127 object->objfile = NULL; 128 Py_DECREF ((PyObject *) object); 129 do_cleanups (cleanup); 130 } 131 132 /* Return a borrowed reference to the Python object of type Objfile 133 representing OBJFILE. If the object has already been created, 134 return it. Otherwise, create it. Return NULL and set the Python 135 error on failure. */ 136 PyObject * 137 objfile_to_objfile_object (struct objfile *objfile) 138 { 139 objfile_object *object; 140 141 object = objfile_data (objfile, objfpy_objfile_data_key); 142 if (!object) 143 { 144 object = PyObject_New (objfile_object, &objfile_object_type); 145 if (object) 146 { 147 PyObject *dict; 148 149 object->objfile = objfile; 150 151 object->printers = PyList_New (0); 152 if (!object->printers) 153 { 154 Py_DECREF (object); 155 return NULL; 156 } 157 158 set_objfile_data (objfile, objfpy_objfile_data_key, object); 159 } 160 } 161 162 return (PyObject *) object; 163 } 164 165 void 166 gdbpy_initialize_objfile (void) 167 { 168 objfpy_objfile_data_key 169 = register_objfile_data_with_cleanup (NULL, py_free_objfile); 170 171 if (PyType_Ready (&objfile_object_type) < 0) 172 return; 173 174 Py_INCREF (&objfile_object_type); 175 PyModule_AddObject (gdb_module, "Objfile", (PyObject *) &objfile_object_type); 176 } 177 178 179 180 static PyGetSetDef objfile_getset[] = 181 { 182 { "filename", objfpy_get_filename, NULL, 183 "The objfile's filename, or None.", NULL }, 184 { "pretty_printers", objfpy_get_printers, objfpy_set_printers, 185 "Pretty printers.", NULL }, 186 { NULL } 187 }; 188 189 static PyTypeObject objfile_object_type = 190 { 191 PyObject_HEAD_INIT (NULL) 192 0, /*ob_size*/ 193 "gdb.Objfile", /*tp_name*/ 194 sizeof (objfile_object), /*tp_basicsize*/ 195 0, /*tp_itemsize*/ 196 objfpy_dealloc, /*tp_dealloc*/ 197 0, /*tp_print*/ 198 0, /*tp_getattr*/ 199 0, /*tp_setattr*/ 200 0, /*tp_compare*/ 201 0, /*tp_repr*/ 202 0, /*tp_as_number*/ 203 0, /*tp_as_sequence*/ 204 0, /*tp_as_mapping*/ 205 0, /*tp_hash */ 206 0, /*tp_call*/ 207 0, /*tp_str*/ 208 0, /*tp_getattro*/ 209 0, /*tp_setattro*/ 210 0, /*tp_as_buffer*/ 211 Py_TPFLAGS_DEFAULT, /*tp_flags*/ 212 "GDB objfile object", /* tp_doc */ 213 0, /* tp_traverse */ 214 0, /* tp_clear */ 215 0, /* tp_richcompare */ 216 0, /* tp_weaklistoffset */ 217 0, /* tp_iter */ 218 0, /* tp_iternext */ 219 0, /* tp_methods */ 220 0, /* tp_members */ 221 objfile_getset, /* tp_getset */ 222 0, /* tp_base */ 223 0, /* tp_dict */ 224 0, /* tp_descr_get */ 225 0, /* tp_descr_set */ 226 0, /* tp_dictoffset */ 227 0, /* tp_init */ 228 0, /* tp_alloc */ 229 objfpy_new, /* tp_new */ 230 }; 231