1 /* Python interface to inferior threads.
3 Copyright (C) 2009-2021 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
21 #include "gdbthread.h"
23 #include "python-internal.h"
25 extern PyTypeObject thread_object_type
26 CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("thread_object");
28 /* Require that INFERIOR be a valid inferior ID. */
29 #define THPY_REQUIRE_VALID(Thread) \
31 if (!Thread->thread) \
33 PyErr_SetString (PyExc_RuntimeError, \
34 _("Thread no longer exists.")); \
39 gdbpy_ref<thread_object>
40 create_thread_object (struct thread_info *tp)
42 gdbpy_ref<thread_object> thread_obj;
44 gdbpy_ref<inferior_object> inf_obj = inferior_to_inferior_object (tp->inf);
48 thread_obj.reset (PyObject_New (thread_object, &thread_object_type));
49 if (thread_obj == NULL)
52 thread_obj->thread = tp;
53 thread_obj->inf_obj = (PyObject *) inf_obj.release ();
59 thpy_dealloc (PyObject *self)
61 Py_DECREF (((thread_object *) self)->inf_obj);
62 Py_TYPE (self)->tp_free (self);
66 thpy_get_name (PyObject *self, void *ignore)
68 thread_object *thread_obj = (thread_object *) self;
71 THPY_REQUIRE_VALID (thread_obj);
73 name = thread_obj->thread->name;
75 name = target_thread_name (thread_obj->thread);
80 return PyString_FromString (name);
84 thpy_set_name (PyObject *self, PyObject *newvalue, void *ignore)
86 thread_object *thread_obj = (thread_object *) self;
87 gdb::unique_xmalloc_ptr<char> name;
89 if (! thread_obj->thread)
91 PyErr_SetString (PyExc_RuntimeError, _("Thread no longer exists."));
97 PyErr_SetString (PyExc_TypeError,
98 _("Cannot delete `name' attribute."));
101 else if (newvalue == Py_None)
105 else if (! gdbpy_is_string (newvalue))
107 PyErr_SetString (PyExc_TypeError,
108 _("The value of `name' must be a string."));
113 name = python_string_to_host_string (newvalue);
118 xfree (thread_obj->thread->name);
119 thread_obj->thread->name = name.release ();
124 /* Getter for InferiorThread.num. */
127 thpy_get_num (PyObject *self, void *closure)
129 thread_object *thread_obj = (thread_object *) self;
131 THPY_REQUIRE_VALID (thread_obj);
134 = gdb_py_object_from_longest (thread_obj->thread->per_inf_num);
135 return result.release ();
138 /* Getter for InferiorThread.global_num. */
141 thpy_get_global_num (PyObject *self, void *closure)
143 thread_object *thread_obj = (thread_object *) self;
145 THPY_REQUIRE_VALID (thread_obj);
148 = gdb_py_object_from_longest (thread_obj->thread->global_num);
149 return result.release ();
152 /* Getter for InferiorThread.ptid -> (pid, lwp, tid).
153 Returns a tuple with the thread's ptid components. */
156 thpy_get_ptid (PyObject *self, void *closure)
158 thread_object *thread_obj = (thread_object *) self;
160 THPY_REQUIRE_VALID (thread_obj);
162 return gdbpy_create_ptid_object (thread_obj->thread->ptid);
165 /* Getter for InferiorThread.inferior -> Inferior. */
168 thpy_get_inferior (PyObject *self, void *ignore)
170 thread_object *thread_obj = (thread_object *) self;
172 THPY_REQUIRE_VALID (thread_obj);
173 Py_INCREF (thread_obj->inf_obj);
175 return thread_obj->inf_obj;
178 /* Implementation of InferiorThread.switch ().
179 Makes this the GDB selected thread. */
182 thpy_switch (PyObject *self, PyObject *args)
184 thread_object *thread_obj = (thread_object *) self;
186 THPY_REQUIRE_VALID (thread_obj);
190 switch_to_thread (thread_obj->thread);
192 catch (const gdb_exception &except)
194 GDB_PY_HANDLE_EXCEPTION (except);
200 /* Implementation of InferiorThread.is_stopped () -> Boolean.
201 Return whether the thread is stopped. */
204 thpy_is_stopped (PyObject *self, PyObject *args)
206 thread_object *thread_obj = (thread_object *) self;
208 THPY_REQUIRE_VALID (thread_obj);
210 if (thread_obj->thread->state == THREAD_STOPPED)
216 /* Implementation of InferiorThread.is_running () -> Boolean.
217 Return whether the thread is running. */
220 thpy_is_running (PyObject *self, PyObject *args)
222 thread_object *thread_obj = (thread_object *) self;
224 THPY_REQUIRE_VALID (thread_obj);
226 if (thread_obj->thread->state == THREAD_RUNNING)
232 /* Implementation of InferiorThread.is_exited () -> Boolean.
233 Return whether the thread is exited. */
236 thpy_is_exited (PyObject *self, PyObject *args)
238 thread_object *thread_obj = (thread_object *) self;
240 THPY_REQUIRE_VALID (thread_obj);
242 if (thread_obj->thread->state == THREAD_EXITED)
248 /* Implementation of gdb.InfThread.is_valid (self) -> Boolean.
249 Returns True if this inferior Thread object still exists
253 thpy_is_valid (PyObject *self, PyObject *args)
255 thread_object *thread_obj = (thread_object *) self;
257 if (! thread_obj->thread)
263 /* Implementation of gdb.InferiorThread.handle (self) -> handle. */
266 thpy_thread_handle (PyObject *self, PyObject *args)
268 thread_object *thread_obj = (thread_object *) self;
269 THPY_REQUIRE_VALID (thread_obj);
275 hv = target_thread_info_to_thread_handle (thread_obj->thread);
277 catch (const gdb_exception &except)
279 GDB_PY_HANDLE_EXCEPTION (except);
284 PyErr_SetString (PyExc_RuntimeError, _("Thread handle not found."));
288 PyObject *object = PyBytes_FromStringAndSize ((const char *) hv.data (),
293 /* Return a reference to a new Python object representing a ptid_t.
294 The object is a tuple containing (pid, lwp, tid). */
296 gdbpy_create_ptid_object (ptid_t ptid)
302 ret = PyTuple_New (3);
310 gdbpy_ref<> pid_obj = gdb_py_object_from_longest (pid);
311 if (pid_obj == nullptr)
313 gdbpy_ref<> lwp_obj = gdb_py_object_from_longest (lwp);
314 if (lwp_obj == nullptr)
316 gdbpy_ref<> tid_obj = gdb_py_object_from_longest (tid);
317 if (tid_obj == nullptr)
320 /* Note that these steal references, hence the use of 'release'. */
321 PyTuple_SET_ITEM (ret, 0, pid_obj.release ());
322 PyTuple_SET_ITEM (ret, 1, lwp_obj.release ());
323 PyTuple_SET_ITEM (ret, 2, tid_obj.release ());
328 /* Implementation of gdb.selected_thread () -> gdb.InferiorThread.
329 Returns the selected thread object. */
332 gdbpy_selected_thread (PyObject *self, PyObject *args)
334 if (inferior_ptid != null_ptid)
335 return thread_to_thread_object (inferior_thread ()).release ();
341 gdbpy_initialize_thread (void)
343 if (PyType_Ready (&thread_object_type) < 0)
346 return gdb_pymodule_addobject (gdb_module, "InferiorThread",
347 (PyObject *) &thread_object_type);
350 static gdb_PyGetSetDef thread_object_getset[] =
352 { "name", thpy_get_name, thpy_set_name,
353 "The name of the thread, as set by the user or the OS.", NULL },
354 { "num", thpy_get_num, NULL,
355 "Per-inferior number of the thread, as assigned by GDB.", NULL },
356 { "global_num", thpy_get_global_num, NULL,
357 "Global number of the thread, as assigned by GDB.", NULL },
358 { "ptid", thpy_get_ptid, NULL, "ID of the thread, as assigned by the OS.",
360 { "inferior", thpy_get_inferior, NULL,
361 "The Inferior object this thread belongs to.", NULL },
366 static PyMethodDef thread_object_methods[] =
368 { "is_valid", thpy_is_valid, METH_NOARGS,
369 "is_valid () -> Boolean.\n\
370 Return true if this inferior thread is valid, false if not." },
371 { "switch", thpy_switch, METH_NOARGS,
373 Makes this the GDB selected thread." },
374 { "is_stopped", thpy_is_stopped, METH_NOARGS,
375 "is_stopped () -> Boolean\n\
376 Return whether the thread is stopped." },
377 { "is_running", thpy_is_running, METH_NOARGS,
378 "is_running () -> Boolean\n\
379 Return whether the thread is running." },
380 { "is_exited", thpy_is_exited, METH_NOARGS,
381 "is_exited () -> Boolean\n\
382 Return whether the thread is exited." },
383 { "handle", thpy_thread_handle, METH_NOARGS,
384 "handle () -> handle\n\
385 Return thread library specific handle for thread." },
390 PyTypeObject thread_object_type =
392 PyVarObject_HEAD_INIT (NULL, 0)
393 "gdb.InferiorThread", /*tp_name*/
394 sizeof (thread_object), /*tp_basicsize*/
396 thpy_dealloc, /*tp_dealloc*/
403 0, /*tp_as_sequence*/
411 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_ITER, /*tp_flags*/
412 "GDB thread object", /* tp_doc */
415 0, /* tp_richcompare */
416 0, /* tp_weaklistoffset */
419 thread_object_methods, /* tp_methods */
421 thread_object_getset, /* tp_getset */
424 0, /* tp_descr_get */
425 0, /* tp_descr_set */
426 0, /* tp_dictoffset */