1 /* Python interface to inferior threads.
3 Copyright (C) 2009-2022 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;
70 THPY_REQUIRE_VALID (thread_obj);
72 const char *name = thread_name (thread_obj->thread);
76 return PyString_FromString (name);
79 /* Return a string containing target specific additional information about
80 the state of the thread, or None, if there is no such additional
84 thpy_get_details (PyObject *self, void *ignore)
86 thread_object *thread_obj = (thread_object *) self;
88 THPY_REQUIRE_VALID (thread_obj);
90 /* GCC can't tell that extra_info will always be assigned after the
91 'catch', so initialize it. */
92 const char *extra_info = nullptr;
95 extra_info = target_extra_thread_info (thread_obj->thread);
97 catch (const gdb_exception &except)
99 GDB_PY_HANDLE_EXCEPTION (except);
101 if (extra_info == nullptr)
104 return PyString_FromString (extra_info);
108 thpy_set_name (PyObject *self, PyObject *newvalue, void *ignore)
110 thread_object *thread_obj = (thread_object *) self;
111 gdb::unique_xmalloc_ptr<char> name;
113 if (! thread_obj->thread)
115 PyErr_SetString (PyExc_RuntimeError, _("Thread no longer exists."));
119 if (newvalue == NULL)
121 PyErr_SetString (PyExc_TypeError,
122 _("Cannot delete `name' attribute."));
125 else if (newvalue == Py_None)
129 else if (! gdbpy_is_string (newvalue))
131 PyErr_SetString (PyExc_TypeError,
132 _("The value of `name' must be a string."));
137 name = python_string_to_host_string (newvalue);
142 thread_obj->thread->set_name (std::move (name));
147 /* Getter for InferiorThread.num. */
150 thpy_get_num (PyObject *self, void *closure)
152 thread_object *thread_obj = (thread_object *) self;
154 THPY_REQUIRE_VALID (thread_obj);
157 = gdb_py_object_from_longest (thread_obj->thread->per_inf_num);
158 return result.release ();
161 /* Getter for InferiorThread.global_num. */
164 thpy_get_global_num (PyObject *self, void *closure)
166 thread_object *thread_obj = (thread_object *) self;
168 THPY_REQUIRE_VALID (thread_obj);
171 = gdb_py_object_from_longest (thread_obj->thread->global_num);
172 return result.release ();
175 /* Getter for InferiorThread.ptid -> (pid, lwp, tid).
176 Returns a tuple with the thread's ptid components. */
179 thpy_get_ptid (PyObject *self, void *closure)
181 thread_object *thread_obj = (thread_object *) self;
183 THPY_REQUIRE_VALID (thread_obj);
185 return gdbpy_create_ptid_object (thread_obj->thread->ptid);
188 /* Getter for InferiorThread.inferior -> Inferior. */
191 thpy_get_inferior (PyObject *self, void *ignore)
193 thread_object *thread_obj = (thread_object *) self;
195 THPY_REQUIRE_VALID (thread_obj);
196 Py_INCREF (thread_obj->inf_obj);
198 return thread_obj->inf_obj;
201 /* Implementation of InferiorThread.switch ().
202 Makes this the GDB selected thread. */
205 thpy_switch (PyObject *self, PyObject *args)
207 thread_object *thread_obj = (thread_object *) self;
209 THPY_REQUIRE_VALID (thread_obj);
213 switch_to_thread (thread_obj->thread);
215 catch (const gdb_exception &except)
217 GDB_PY_HANDLE_EXCEPTION (except);
223 /* Implementation of InferiorThread.is_stopped () -> Boolean.
224 Return whether the thread is stopped. */
227 thpy_is_stopped (PyObject *self, PyObject *args)
229 thread_object *thread_obj = (thread_object *) self;
231 THPY_REQUIRE_VALID (thread_obj);
233 if (thread_obj->thread->state == THREAD_STOPPED)
239 /* Implementation of InferiorThread.is_running () -> Boolean.
240 Return whether the thread is running. */
243 thpy_is_running (PyObject *self, PyObject *args)
245 thread_object *thread_obj = (thread_object *) self;
247 THPY_REQUIRE_VALID (thread_obj);
249 if (thread_obj->thread->state == THREAD_RUNNING)
255 /* Implementation of InferiorThread.is_exited () -> Boolean.
256 Return whether the thread is exited. */
259 thpy_is_exited (PyObject *self, PyObject *args)
261 thread_object *thread_obj = (thread_object *) self;
263 THPY_REQUIRE_VALID (thread_obj);
265 if (thread_obj->thread->state == THREAD_EXITED)
271 /* Implementation of gdb.InfThread.is_valid (self) -> Boolean.
272 Returns True if this inferior Thread object still exists
276 thpy_is_valid (PyObject *self, PyObject *args)
278 thread_object *thread_obj = (thread_object *) self;
280 if (! thread_obj->thread)
286 /* Implementation of gdb.InferiorThread.handle (self) -> handle. */
289 thpy_thread_handle (PyObject *self, PyObject *args)
291 thread_object *thread_obj = (thread_object *) self;
292 THPY_REQUIRE_VALID (thread_obj);
298 hv = target_thread_info_to_thread_handle (thread_obj->thread);
300 catch (const gdb_exception &except)
302 GDB_PY_HANDLE_EXCEPTION (except);
307 PyErr_SetString (PyExc_RuntimeError, _("Thread handle not found."));
311 PyObject *object = PyBytes_FromStringAndSize ((const char *) hv.data (),
316 /* Return a reference to a new Python object representing a ptid_t.
317 The object is a tuple containing (pid, lwp, tid). */
319 gdbpy_create_ptid_object (ptid_t ptid)
326 ret = PyTuple_New (3);
334 gdbpy_ref<> pid_obj = gdb_py_object_from_longest (pid);
335 if (pid_obj == nullptr)
337 gdbpy_ref<> lwp_obj = gdb_py_object_from_longest (lwp);
338 if (lwp_obj == nullptr)
340 gdbpy_ref<> tid_obj = gdb_py_object_from_ulongest (tid);
341 if (tid_obj == nullptr)
344 /* Note that these steal references, hence the use of 'release'. */
345 PyTuple_SET_ITEM (ret, 0, pid_obj.release ());
346 PyTuple_SET_ITEM (ret, 1, lwp_obj.release ());
347 PyTuple_SET_ITEM (ret, 2, tid_obj.release ());
352 /* Implementation of gdb.selected_thread () -> gdb.InferiorThread.
353 Returns the selected thread object. */
356 gdbpy_selected_thread (PyObject *self, PyObject *args)
358 if (inferior_ptid != null_ptid)
359 return thread_to_thread_object (inferior_thread ()).release ();
365 gdbpy_initialize_thread (void)
367 if (PyType_Ready (&thread_object_type) < 0)
370 return gdb_pymodule_addobject (gdb_module, "InferiorThread",
371 (PyObject *) &thread_object_type);
374 static gdb_PyGetSetDef thread_object_getset[] =
376 { "name", thpy_get_name, thpy_set_name,
377 "The name of the thread, as set by the user or the OS.", NULL },
378 { "details", thpy_get_details, NULL,
379 "A target specific string containing extra thread state details.",
381 { "num", thpy_get_num, NULL,
382 "Per-inferior number of the thread, as assigned by GDB.", NULL },
383 { "global_num", thpy_get_global_num, NULL,
384 "Global number of the thread, as assigned by GDB.", NULL },
385 { "ptid", thpy_get_ptid, NULL, "ID of the thread, as assigned by the OS.",
387 { "inferior", thpy_get_inferior, NULL,
388 "The Inferior object this thread belongs to.", NULL },
393 static PyMethodDef thread_object_methods[] =
395 { "is_valid", thpy_is_valid, METH_NOARGS,
396 "is_valid () -> Boolean.\n\
397 Return true if this inferior thread is valid, false if not." },
398 { "switch", thpy_switch, METH_NOARGS,
400 Makes this the GDB selected thread." },
401 { "is_stopped", thpy_is_stopped, METH_NOARGS,
402 "is_stopped () -> Boolean\n\
403 Return whether the thread is stopped." },
404 { "is_running", thpy_is_running, METH_NOARGS,
405 "is_running () -> Boolean\n\
406 Return whether the thread is running." },
407 { "is_exited", thpy_is_exited, METH_NOARGS,
408 "is_exited () -> Boolean\n\
409 Return whether the thread is exited." },
410 { "handle", thpy_thread_handle, METH_NOARGS,
411 "handle () -> handle\n\
412 Return thread library specific handle for thread." },
417 PyTypeObject thread_object_type =
419 PyVarObject_HEAD_INIT (NULL, 0)
420 "gdb.InferiorThread", /*tp_name*/
421 sizeof (thread_object), /*tp_basicsize*/
423 thpy_dealloc, /*tp_dealloc*/
430 0, /*tp_as_sequence*/
438 Py_TPFLAGS_DEFAULT, /*tp_flags*/
439 "GDB thread object", /* tp_doc */
442 0, /* tp_richcompare */
443 0, /* tp_weaklistoffset */
446 thread_object_methods, /* tp_methods */
448 thread_object_getset, /* tp_getset */
451 0, /* tp_descr_get */
452 0, /* tp_descr_set */
453 0, /* tp_dictoffset */