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fa33c3cd DE |
1 | /* Python interface to program spaces. |
2 | ||
3 | Copyright (C) 2010 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 "progspace.h" | |
24 | #include "objfiles.h" | |
25 | #include "language.h" | |
26 | ||
27 | typedef struct | |
28 | { | |
29 | PyObject_HEAD | |
30 | ||
31 | /* The corresponding pspace. */ | |
32 | struct program_space *pspace; | |
33 | ||
34 | /* The pretty-printer list of functions. */ | |
35 | PyObject *printers; | |
36 | } pspace_object; | |
37 | ||
38 | static PyTypeObject pspace_object_type; | |
39 | ||
40 | static const struct program_space_data *pspy_pspace_data_key; | |
41 | ||
42 | \f | |
43 | ||
44 | /* An Objfile method which returns the objfile's file name, or None. */ | |
45 | ||
46 | static PyObject * | |
47 | pspy_get_filename (PyObject *self, void *closure) | |
48 | { | |
49 | pspace_object *obj = (pspace_object *) self; | |
50 | if (obj->pspace) | |
51 | { | |
52 | struct objfile *objfile = obj->pspace->symfile_object_file; | |
53 | if (objfile && objfile->name) | |
54 | return PyString_Decode (objfile->name, strlen (objfile->name), | |
55 | host_charset (), NULL); | |
56 | } | |
57 | Py_RETURN_NONE; | |
58 | } | |
59 | ||
60 | static void | |
61 | pspy_dealloc (PyObject *self) | |
62 | { | |
63 | pspace_object *ps_self = (pspace_object *) self; | |
64 | Py_XDECREF (ps_self->printers); | |
65 | self->ob_type->tp_free (self); | |
66 | } | |
67 | ||
68 | static PyObject * | |
69 | pspy_new (PyTypeObject *type, PyObject *args, PyObject *keywords) | |
70 | { | |
71 | pspace_object *self = (pspace_object *) type->tp_alloc (type, 0); | |
72 | if (self) | |
73 | { | |
74 | self->pspace = NULL; | |
75 | ||
76 | self->printers = PyList_New (0); | |
77 | if (!self->printers) | |
78 | { | |
79 | Py_DECREF (self); | |
80 | return NULL; | |
81 | } | |
82 | } | |
83 | return (PyObject *) self; | |
84 | } | |
85 | ||
86 | PyObject * | |
87 | pspy_get_printers (PyObject *o, void *ignore) | |
88 | { | |
89 | pspace_object *self = (pspace_object *) o; | |
90 | Py_INCREF (self->printers); | |
91 | return self->printers; | |
92 | } | |
93 | ||
94 | static int | |
95 | pspy_set_printers (PyObject *o, PyObject *value, void *ignore) | |
96 | { | |
97 | PyObject *tmp; | |
98 | pspace_object *self = (pspace_object *) o; | |
99 | if (! value) | |
100 | { | |
101 | PyErr_SetString (PyExc_TypeError, | |
102 | "cannot delete the pretty_printers attribute"); | |
103 | return -1; | |
104 | } | |
105 | ||
106 | if (! PyList_Check (value)) | |
107 | { | |
108 | PyErr_SetString (PyExc_TypeError, | |
109 | "the pretty_printers attribute must be a list"); | |
110 | return -1; | |
111 | } | |
112 | ||
113 | /* Take care in case the LHS and RHS are related somehow. */ | |
114 | tmp = self->printers; | |
115 | Py_INCREF (value); | |
116 | self->printers = value; | |
117 | Py_XDECREF (tmp); | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | \f | |
123 | ||
124 | /* Clear the PSPACE pointer in a Pspace object and remove the reference. */ | |
125 | ||
126 | static void | |
127 | py_free_pspace (struct program_space *pspace, void *datum) | |
128 | { | |
129 | struct cleanup *cleanup; | |
130 | pspace_object *object = datum; | |
131 | /* FIXME: What's the right way to get a program space's arch? | |
132 | There may be multiple. */ | |
133 | struct gdbarch *arch = get_objfile_arch (pspace->symfile_object_file); | |
134 | ||
135 | cleanup = ensure_python_env (arch, current_language); | |
136 | object->pspace = NULL; | |
137 | Py_DECREF ((PyObject *) object); | |
138 | do_cleanups (cleanup); | |
139 | } | |
140 | ||
141 | /* Return a borrowed reference to the Python object of type Pspace | |
142 | representing PSPACE. If the object has already been created, | |
143 | return it. Otherwise, create it. Return NULL and set the Python | |
144 | error on failure. */ | |
145 | ||
146 | PyObject * | |
147 | pspace_to_pspace_object (struct program_space *pspace) | |
148 | { | |
149 | pspace_object *object; | |
150 | ||
151 | object = program_space_data (pspace, pspy_pspace_data_key); | |
152 | if (!object) | |
153 | { | |
154 | object = PyObject_New (pspace_object, &pspace_object_type); | |
155 | if (object) | |
156 | { | |
fa33c3cd DE |
157 | object->pspace = pspace; |
158 | ||
159 | object->printers = PyList_New (0); | |
160 | if (!object->printers) | |
161 | { | |
162 | Py_DECREF (object); | |
163 | return NULL; | |
164 | } | |
165 | ||
166 | set_program_space_data (pspace, pspy_pspace_data_key, object); | |
167 | } | |
168 | } | |
169 | ||
170 | return (PyObject *) object; | |
171 | } | |
172 | ||
173 | void | |
174 | gdbpy_initialize_pspace (void) | |
175 | { | |
176 | pspy_pspace_data_key | |
177 | = register_program_space_data_with_cleanup (py_free_pspace); | |
178 | ||
179 | if (PyType_Ready (&pspace_object_type) < 0) | |
180 | return; | |
181 | ||
182 | Py_INCREF (&pspace_object_type); | |
183 | PyModule_AddObject (gdb_module, "Progspace", (PyObject *) &pspace_object_type); | |
184 | } | |
185 | ||
186 | \f | |
187 | ||
188 | static PyGetSetDef pspace_getset[] = | |
189 | { | |
190 | { "filename", pspy_get_filename, NULL, | |
191 | "The progspace's main filename, or None.", NULL }, | |
192 | { "pretty_printers", pspy_get_printers, pspy_set_printers, | |
193 | "Pretty printers.", NULL }, | |
194 | { NULL } | |
195 | }; | |
196 | ||
197 | static PyTypeObject pspace_object_type = | |
198 | { | |
199 | PyObject_HEAD_INIT (NULL) | |
200 | 0, /*ob_size*/ | |
201 | "gdb.Progspace", /*tp_name*/ | |
202 | sizeof (pspace_object), /*tp_basicsize*/ | |
203 | 0, /*tp_itemsize*/ | |
204 | pspy_dealloc, /*tp_dealloc*/ | |
205 | 0, /*tp_print*/ | |
206 | 0, /*tp_getattr*/ | |
207 | 0, /*tp_setattr*/ | |
208 | 0, /*tp_compare*/ | |
209 | 0, /*tp_repr*/ | |
210 | 0, /*tp_as_number*/ | |
211 | 0, /*tp_as_sequence*/ | |
212 | 0, /*tp_as_mapping*/ | |
213 | 0, /*tp_hash */ | |
214 | 0, /*tp_call*/ | |
215 | 0, /*tp_str*/ | |
216 | 0, /*tp_getattro*/ | |
217 | 0, /*tp_setattro*/ | |
218 | 0, /*tp_as_buffer*/ | |
219 | Py_TPFLAGS_DEFAULT, /*tp_flags*/ | |
220 | "GDB progspace object", /* tp_doc */ | |
221 | 0, /* tp_traverse */ | |
222 | 0, /* tp_clear */ | |
223 | 0, /* tp_richcompare */ | |
224 | 0, /* tp_weaklistoffset */ | |
225 | 0, /* tp_iter */ | |
226 | 0, /* tp_iternext */ | |
227 | 0, /* tp_methods */ | |
228 | 0, /* tp_members */ | |
229 | pspace_getset, /* tp_getset */ | |
230 | 0, /* tp_base */ | |
231 | 0, /* tp_dict */ | |
232 | 0, /* tp_descr_get */ | |
233 | 0, /* tp_descr_set */ | |
234 | 0, /* tp_dictoffset */ | |
235 | 0, /* tp_init */ | |
236 | 0, /* tp_alloc */ | |
237 | pspy_new, /* tp_new */ | |
238 | }; |