/home/mdboom/Work/builds/cpython/Python/pystate.c
Line | Count | Source (jump to first uncovered line) |
1 | |
2 | /* Thread and interpreter state structures and their interfaces */ |
3 | |
4 | #include "Python.h" |
5 | #include "pycore_ceval.h" |
6 | #include "pycore_code.h" // stats |
7 | #include "pycore_frame.h" |
8 | #include "pycore_initconfig.h" |
9 | #include "pycore_object.h" // _PyType_InitCache() |
10 | #include "pycore_pyerrors.h" |
11 | #include "pycore_pylifecycle.h" |
12 | #include "pycore_pymem.h" // _PyMem_SetDefaultAllocator() |
13 | #include "pycore_pystate.h" // _PyThreadState_GET() |
14 | #include "pycore_runtime_init.h" // _PyRuntimeState_INIT |
15 | #include "pycore_sysmodule.h" |
16 | |
17 | /* -------------------------------------------------------------------------- |
18 | CAUTION |
19 | |
20 | Always use PyMem_RawMalloc() and PyMem_RawFree() directly in this file. A |
21 | number of these functions are advertised as safe to call when the GIL isn't |
22 | held, and in a debug build Python redirects (e.g.) PyMem_NEW (etc) to Python's |
23 | debugging obmalloc functions. Those aren't thread-safe (they rely on the GIL |
24 | to avoid the expense of doing their own locking). |
25 | -------------------------------------------------------------------------- */ |
26 | |
27 | #ifdef HAVE_DLOPEN |
28 | #ifdef HAVE_DLFCN_H |
29 | #include <dlfcn.h> |
30 | #endif |
31 | #if !HAVE_DECL_RTLD_LAZY |
32 | #define RTLD_LAZY 1 |
33 | #endif |
34 | #endif |
35 | |
36 | #ifdef __cplusplus |
37 | extern "C" { |
38 | #endif |
39 | |
40 | #define _PyRuntimeGILState_GetThreadState(gilstate) \ |
41 | ((PyThreadState*)_Py_atomic_load_relaxed(&(gilstate)->tstate_current)) |
42 | #define _PyRuntimeGILState_SetThreadState(gilstate, value) \ |
43 | _Py_atomic_store_relaxed(&(gilstate)->tstate_current, \ |
44 | (uintptr_t)(value)) |
45 | |
46 | /* Forward declarations */ |
47 | static PyThreadState *_PyGILState_GetThisThreadState(struct _gilstate_runtime_state *gilstate); |
48 | static void _PyThreadState_Delete(PyThreadState *tstate, int check_current); |
49 | |
50 | /* Suppress deprecation warning for PyBytesObject.ob_shash */ |
51 | _Py_COMP_DIAG_PUSH |
52 | _Py_COMP_DIAG_IGNORE_DEPR_DECLS |
53 | /* We use "initial" if the runtime gets re-used |
54 | (e.g. Py_Finalize() followed by Py_Initialize(). */ |
55 | static const _PyRuntimeState initial = _PyRuntimeState_INIT; |
56 | _Py_COMP_DIAG_POP |
57 | |
58 | static int |
59 | alloc_for_runtime(PyThread_type_lock *plock1, PyThread_type_lock *plock2, |
60 | PyThread_type_lock *plock3) |
61 | { |
62 | /* Force default allocator, since _PyRuntimeState_Fini() must |
63 | use the same allocator than this function. */ |
64 | PyMemAllocatorEx old_alloc; |
65 | _PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
66 | |
67 | PyThread_type_lock lock1 = PyThread_allocate_lock(); |
68 | if (lock1 == NULL) { Branch (68:9): [True: 0, False: 107]
|
69 | return -1; |
70 | } |
71 | |
72 | PyThread_type_lock lock2 = PyThread_allocate_lock(); |
73 | if (lock2 == NULL) { Branch (73:9): [True: 0, False: 107]
|
74 | PyThread_free_lock(lock1); |
75 | return -1; |
76 | } |
77 | |
78 | PyThread_type_lock lock3 = PyThread_allocate_lock(); |
79 | if (lock3 == NULL) { Branch (79:9): [True: 0, False: 107]
|
80 | PyThread_free_lock(lock1); |
81 | PyThread_free_lock(lock2); |
82 | return -1; |
83 | } |
84 | |
85 | PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
86 | |
87 | *plock1 = lock1; |
88 | *plock2 = lock2; |
89 | *plock3 = lock3; |
90 | return 0; |
91 | } |
92 | |
93 | static void |
94 | init_runtime(_PyRuntimeState *runtime, |
95 | void *open_code_hook, void *open_code_userdata, |
96 | _Py_AuditHookEntry *audit_hook_head, |
97 | Py_ssize_t unicode_next_index, |
98 | PyThread_type_lock unicode_ids_mutex, |
99 | PyThread_type_lock interpreters_mutex, |
100 | PyThread_type_lock xidregistry_mutex) |
101 | { |
102 | if (runtime->_initialized) { Branch (102:9): [True: 0, False: 107]
|
103 | Py_FatalError("runtime already initialized"); |
104 | } |
105 | assert(!runtime->preinitializing && |
106 | !runtime->preinitialized && |
107 | !runtime->core_initialized && |
108 | !runtime->initialized); |
109 | |
110 | runtime->open_code_hook = open_code_hook; |
111 | runtime->open_code_userdata = open_code_userdata; |
112 | runtime->audit_hook_head = audit_hook_head; |
113 | |
114 | _PyEval_InitRuntimeState(&runtime->ceval); |
115 | |
116 | PyPreConfig_InitPythonConfig(&runtime->preconfig); |
117 | |
118 | runtime->interpreters.mutex = interpreters_mutex; |
119 | |
120 | runtime->xidregistry.mutex = xidregistry_mutex; |
121 | |
122 | // Set it to the ID of the main thread of the main interpreter. |
123 | runtime->main_thread = PyThread_get_thread_ident(); |
124 | |
125 | runtime->unicode_ids.next_index = unicode_next_index; |
126 | runtime->unicode_ids.lock = unicode_ids_mutex; |
127 | |
128 | runtime->_initialized = 1; |
129 | } |
130 | |
131 | PyStatus |
132 | _PyRuntimeState_Init(_PyRuntimeState *runtime) |
133 | { |
134 | /* We preserve the hook across init, because there is |
135 | currently no public API to set it between runtime |
136 | initialization and interpreter initialization. */ |
137 | void *open_code_hook = runtime->open_code_hook; |
138 | void *open_code_userdata = runtime->open_code_userdata; |
139 | _Py_AuditHookEntry *audit_hook_head = runtime->audit_hook_head; |
140 | // bpo-42882: Preserve next_index value if Py_Initialize()/Py_Finalize() |
141 | // is called multiple times. |
142 | Py_ssize_t unicode_next_index = runtime->unicode_ids.next_index; |
143 | |
144 | PyThread_type_lock lock1, lock2, lock3; |
145 | if (alloc_for_runtime(&lock1, &lock2, &lock3) != 0) { Branch (145:9): [True: 0, False: 107]
|
146 | return _PyStatus_NO_MEMORY(); |
147 | } |
148 | |
149 | if (runtime->_initialized) { Branch (149:9): [True: 34, False: 73]
|
150 | // Py_Initialize() must be running again. |
151 | // Reset to _PyRuntimeState_INIT. |
152 | memcpy(runtime, &initial, sizeof(*runtime)); |
153 | } |
154 | init_runtime(runtime, open_code_hook, open_code_userdata, audit_hook_head, |
155 | unicode_next_index, lock1, lock2, lock3); |
156 | |
157 | return _PyStatus_OK(); |
158 | } |
159 | |
160 | void |
161 | _PyRuntimeState_Fini(_PyRuntimeState *runtime) |
162 | { |
163 | /* Force the allocator used by _PyRuntimeState_Init(). */ |
164 | PyMemAllocatorEx old_alloc; |
165 | _PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
166 | #define FREE_LOCK(LOCK) \ |
167 | if (LOCK != NULL) { \ |
168 | PyThread_free_lock(LOCK); \ |
169 | LOCK = NULL; \ |
170 | } |
171 | |
172 | FREE_LOCK(runtime->interpreters.mutex); |
173 | FREE_LOCK(runtime->xidregistry.mutex); |
174 | FREE_LOCK(runtime->unicode_ids.lock); |
175 | |
176 | #undef FREE_LOCK |
177 | PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
178 | } |
179 | |
180 | #ifdef HAVE_FORK |
181 | /* This function is called from PyOS_AfterFork_Child to ensure that |
182 | newly created child processes do not share locks with the parent. */ |
183 | PyStatus |
184 | _PyRuntimeState_ReInitThreads(_PyRuntimeState *runtime) |
185 | { |
186 | // This was initially set in _PyRuntimeState_Init(). |
187 | runtime->main_thread = PyThread_get_thread_ident(); |
188 | |
189 | /* Force default allocator, since _PyRuntimeState_Fini() must |
190 | use the same allocator than this function. */ |
191 | PyMemAllocatorEx old_alloc; |
192 | _PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
193 |
|
194 | int reinit_interp = _PyThread_at_fork_reinit(&runtime->interpreters.mutex); |
195 | int reinit_xidregistry = _PyThread_at_fork_reinit(&runtime->xidregistry.mutex); |
196 | int reinit_unicode_ids = _PyThread_at_fork_reinit(&runtime->unicode_ids.lock); |
197 |
|
198 | PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
199 | |
200 | /* bpo-42540: id_mutex is freed by _PyInterpreterState_Delete, which does |
201 | * not force the default allocator. */ |
202 | int reinit_main_id = _PyThread_at_fork_reinit(&runtime->interpreters.main->id_mutex); |
203 |
|
204 | if (reinit_interp < 0 Branch (204:9): [True: 0, False: 0]
|
205 | || reinit_main_id < 0 Branch (205:12): [True: 0, False: 0]
|
206 | || reinit_xidregistry < 0 Branch (206:12): [True: 0, False: 0]
|
207 | || reinit_unicode_ids < 0) Branch (207:12): [True: 0, False: 0]
|
208 | { |
209 | return _PyStatus_ERR("Failed to reinitialize runtime locks"); |
210 |
|
211 | } |
212 | return _PyStatus_OK(); |
213 | } |
214 | #endif |
215 | |
216 | #define HEAD_LOCK(runtime) \ |
217 | PyThread_acquire_lock((runtime)->interpreters.mutex, WAIT_LOCK) |
218 | #define HEAD_UNLOCK(runtime) \ |
219 | PyThread_release_lock((runtime)->interpreters.mutex) |
220 | |
221 | /* Forward declaration */ |
222 | static void _PyGILState_NoteThreadState( |
223 | struct _gilstate_runtime_state *gilstate, PyThreadState* tstate); |
224 | |
225 | PyStatus |
226 | _PyInterpreterState_Enable(_PyRuntimeState *runtime) |
227 | { |
228 | struct pyinterpreters *interpreters = &runtime->interpreters; |
229 | interpreters->next_id = 0; |
230 | |
231 | /* Py_Finalize() calls _PyRuntimeState_Fini() which clears the mutex. |
232 | Create a new mutex if needed. */ |
233 | if (interpreters->mutex == NULL) { Branch (233:9): [True: 0, False: 107]
|
234 | /* Force default allocator, since _PyRuntimeState_Fini() must |
235 | use the same allocator than this function. */ |
236 | PyMemAllocatorEx old_alloc; |
237 | _PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
238 |
|
239 | interpreters->mutex = PyThread_allocate_lock(); |
240 |
|
241 | PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
242 |
|
243 | if (interpreters->mutex == NULL) { Branch (243:13): [True: 0, False: 0]
|
244 | return _PyStatus_ERR("Can't initialize threads for interpreter"); |
245 | } |
246 | } |
247 | |
248 | return _PyStatus_OK(); |
249 | } |
250 | |
251 | static PyInterpreterState * |
252 | alloc_interpreter(void) |
253 | { |
254 | return PyMem_RawCalloc(1, sizeof(PyInterpreterState)); |
255 | } |
256 | |
257 | static void |
258 | free_interpreter(PyInterpreterState *interp) |
259 | { |
260 | if (!interp->_static) { Branch (260:9): [True: 0, False: 272]
|
261 | PyMem_RawFree(interp); |
262 | } |
263 | } |
264 | |
265 | /* Get the interpreter state to a minimal consistent state. |
266 | Further init happens in pylifecycle.c before it can be used. |
267 | All fields not initialized here are expected to be zeroed out, |
268 | e.g. by PyMem_RawCalloc() or memset(), or otherwise pre-initialized. |
269 | The runtime state is not manipulated. Instead it is assumed that |
270 | the interpreter is getting added to the runtime. |
271 | */ |
272 | |
273 | static void |
274 | init_interpreter(PyInterpreterState *interp, |
275 | _PyRuntimeState *runtime, int64_t id, |
276 | PyInterpreterState *next, |
277 | PyThread_type_lock pending_lock) |
278 | { |
279 | if (interp->_initialized) { Branch (279:9): [True: 0, False: 278]
|
280 | Py_FatalError("interpreter already initialized"); |
281 | } |
282 | |
283 | assert(runtime != NULL); |
284 | interp->runtime = runtime; |
285 | |
286 | assert(id > 0 || (id == 0 && interp == runtime->interpreters.main)); |
287 | interp->id = id; |
288 | |
289 | assert(runtime->interpreters.head == interp); |
290 | assert(next != NULL || (interp == runtime->interpreters.main)); |
291 | interp->next = next; |
292 | |
293 | _PyEval_InitState(&interp->ceval, pending_lock); |
294 | _PyGC_InitState(&interp->gc); |
295 | PyConfig_InitPythonConfig(&interp->config); |
296 | _PyType_InitCache(interp); |
297 | |
298 | interp->_initialized = 1; |
299 | } |
300 | |
301 | PyInterpreterState * |
302 | PyInterpreterState_New(void) |
303 | { |
304 | PyInterpreterState *interp; |
305 | PyThreadState *tstate = _PyThreadState_GET(); |
306 | |
307 | /* tstate is NULL when Py_InitializeFromConfig() calls |
308 | PyInterpreterState_New() to create the main interpreter. */ |
309 | if (_PySys_Audit(tstate, "cpython.PyInterpreterState_New", NULL) < 0) { Branch (309:9): [True: 0, False: 278]
|
310 | return NULL; |
311 | } |
312 | |
313 | PyThread_type_lock pending_lock = PyThread_allocate_lock(); |
314 | if (pending_lock == NULL) { Branch (314:9): [True: 0, False: 278]
|
315 | if (tstate != NULL) { Branch (315:13): [True: 0, False: 0]
|
316 | _PyErr_NoMemory(tstate); |
317 | } |
318 | return NULL; |
319 | } |
320 | |
321 | /* Don't get runtime from tstate since tstate can be NULL. */ |
322 | _PyRuntimeState *runtime = &_PyRuntime; |
323 | struct pyinterpreters *interpreters = &runtime->interpreters; |
324 | |
325 | /* We completely serialize creation of multiple interpreters, since |
326 | it simplifies things here and blocking concurrent calls isn't a problem. |
327 | Regardless, we must fully block subinterpreter creation until |
328 | after the main interpreter is created. */ |
329 | HEAD_LOCK(runtime); |
330 | |
331 | int64_t id = interpreters->next_id; |
332 | interpreters->next_id += 1; |
333 | |
334 | // Allocate the interpreter and add it to the runtime state. |
335 | PyInterpreterState *old_head = interpreters->head; |
336 | if (old_head == NULL) { Branch (336:9): [True: 107, False: 171]
|
337 | // We are creating the main interpreter. |
338 | assert(interpreters->main == NULL); |
339 | assert(id == 0); |
340 | |
341 | interp = &runtime->_main_interpreter; |
342 | assert(interp->id == 0); |
343 | assert(interp->next == NULL); |
344 | |
345 | interpreters->main = interp; |
346 | } |
347 | else { |
348 | assert(interpreters->main != NULL); |
349 | assert(id != 0); |
350 | |
351 | interp = alloc_interpreter(); |
352 | if (interp == NULL) { Branch (352:13): [True: 0, False: 171]
|
353 | goto error; |
354 | } |
355 | // Set to _PyInterpreterState_INIT. |
356 | memcpy(interp, &initial._main_interpreter, |
357 | sizeof(*interp)); |
358 | |
359 | if (id < 0) { Branch (359:13): [True: 0, False: 171]
|
360 | /* overflow or Py_Initialize() not called yet! */ |
361 | if (tstate != NULL) { Branch (361:17): [True: 0, False: 0]
|
362 | _PyErr_SetString(tstate, PyExc_RuntimeError, |
363 | "failed to get an interpreter ID"); |
364 | } |
365 | goto error; |
366 | } |
367 | } |
368 | interpreters->head = interp; |
369 | |
370 | init_interpreter(interp, runtime, id, old_head, pending_lock); |
371 | |
372 | HEAD_UNLOCK(runtime); |
373 | return interp; |
374 | |
375 | error: |
376 | HEAD_UNLOCK(runtime); |
377 |
|
378 | PyThread_free_lock(pending_lock); |
379 | if (interp != NULL) { Branch (379:9): [True: 0, False: 0]
|
380 | free_interpreter(interp); |
381 | } |
382 | return NULL; |
383 | } |
384 | |
385 | |
386 | static void |
387 | interpreter_clear(PyInterpreterState *interp, PyThreadState *tstate) |
388 | { |
389 | _PyRuntimeState *runtime = interp->runtime; |
390 | |
391 | if (_PySys_Audit(tstate, "cpython.PyInterpreterState_Clear", NULL) < 0) { Branch (391:9): [True: 0, False: 272]
|
392 | _PyErr_Clear(tstate); |
393 | } |
394 | |
395 | HEAD_LOCK(runtime); |
396 | for (PyThreadState *p = interp->threads.head; p != NULL; p = p->next272 ) { Branch (396:51): [True: 272, False: 272]
|
397 | PyThreadState_Clear(p); |
398 | } |
399 | HEAD_UNLOCK(runtime); |
400 | |
401 | Py_CLEAR(interp->audit_hooks); |
402 | |
403 | PyConfig_Clear(&interp->config); |
404 | Py_CLEAR(interp->codec_search_path); |
405 | Py_CLEAR(interp->codec_search_cache); |
406 | Py_CLEAR(interp->codec_error_registry); |
407 | Py_CLEAR(interp->modules); |
408 | Py_CLEAR(interp->modules_by_index); |
409 | Py_CLEAR(interp->builtins_copy); |
410 | Py_CLEAR(interp->importlib); |
411 | Py_CLEAR(interp->import_func); |
412 | Py_CLEAR(interp->dict); |
413 | #ifdef HAVE_FORK |
414 | Py_CLEAR(interp->before_forkers); |
415 | Py_CLEAR(interp->after_forkers_parent); |
416 | Py_CLEAR(interp->after_forkers_child); |
417 | #endif |
418 | |
419 | _PyAST_Fini(interp); |
420 | _PyWarnings_Fini(interp); |
421 | _PyAtExit_Fini(interp); |
422 | |
423 | // All Python types must be destroyed before the last GC collection. Python |
424 | // types create a reference cycle to themselves in their in their |
425 | // PyTypeObject.tp_mro member (the tuple contains the type). |
426 | |
427 | /* Last garbage collection on this interpreter */ |
428 | _PyGC_CollectNoFail(tstate); |
429 | _PyGC_Fini(interp); |
430 | |
431 | /* We don't clear sysdict and builtins until the end of this function. |
432 | Because clearing other attributes can execute arbitrary Python code |
433 | which requires sysdict and builtins. */ |
434 | PyDict_Clear(interp->sysdict); |
435 | PyDict_Clear(interp->builtins); |
436 | Py_CLEAR(interp->sysdict); |
437 | Py_CLEAR(interp->builtins); |
438 | |
439 | // XXX Once we have one allocator per interpreter (i.e. |
440 | // per-interpreter GC) we must ensure that all of the interpreter's |
441 | // objects have been cleaned up at the point. |
442 | } |
443 | |
444 | |
445 | void |
446 | PyInterpreterState_Clear(PyInterpreterState *interp) |
447 | { |
448 | // Use the current Python thread state to call audit hooks and to collect |
449 | // garbage. It can be different than the current Python thread state |
450 | // of 'interp'. |
451 | PyThreadState *current_tstate = _PyThreadState_GET(); |
452 |
|
453 | interpreter_clear(interp, current_tstate); |
454 | } |
455 | |
456 | |
457 | void |
458 | _PyInterpreterState_Clear(PyThreadState *tstate) |
459 | { |
460 | interpreter_clear(tstate->interp, tstate); |
461 | } |
462 | |
463 | |
464 | static void |
465 | zapthreads(PyInterpreterState *interp, int check_current) |
466 | { |
467 | PyThreadState *tstate; |
468 | /* No need to lock the mutex here because this should only happen |
469 | when the threads are all really dead (XXX famous last words). */ |
470 | while ((tstate = interp->threads.head) != NULL) { Branch (470:12): [True: 272, False: 272]
|
471 | _PyThreadState_Delete(tstate, check_current); |
472 | } |
473 | } |
474 | |
475 | |
476 | void |
477 | PyInterpreterState_Delete(PyInterpreterState *interp) |
478 | { |
479 | _PyRuntimeState *runtime = interp->runtime; |
480 | struct pyinterpreters *interpreters = &runtime->interpreters; |
481 | zapthreads(interp, 0); |
482 | |
483 | _PyEval_FiniState(&interp->ceval); |
484 | |
485 | /* Delete current thread. After this, many C API calls become crashy. */ |
486 | _PyThreadState_Swap(&runtime->gilstate, NULL); |
487 | |
488 | HEAD_LOCK(runtime); |
489 | PyInterpreterState **p; |
490 | for (p = &interpreters->head; ; p = &(*p)->next34 ) { |
491 | if (*p == NULL) { Branch (491:13): [True: 0, False: 306]
|
492 | Py_FatalError("NULL interpreter"); |
493 | } |
494 | if (*p == interp) { Branch (494:13): [True: 272, False: 34]
|
495 | break; |
496 | } |
497 | } |
498 | if (interp->threads.head != NULL) { Branch (498:9): [True: 0, False: 272]
|
499 | Py_FatalError("remaining threads"); |
500 | } |
501 | *p = interp->next; |
502 | |
503 | if (interpreters->main == interp) { Branch (503:9): [True: 103, False: 169]
|
504 | interpreters->main = NULL; |
505 | if (interpreters->head != NULL) { Branch (505:13): [True: 0, False: 103]
|
506 | Py_FatalError("remaining subinterpreters"); |
507 | } |
508 | } |
509 | HEAD_UNLOCK(runtime); |
510 | |
511 | if (interp->id_mutex != NULL) { Branch (511:9): [True: 122, False: 150]
|
512 | PyThread_free_lock(interp->id_mutex); |
513 | } |
514 | free_interpreter(interp); |
515 | } |
516 | |
517 | |
518 | #ifdef HAVE_FORK |
519 | /* |
520 | * Delete all interpreter states except the main interpreter. If there |
521 | * is a current interpreter state, it *must* be the main interpreter. |
522 | */ |
523 | PyStatus |
524 | _PyInterpreterState_DeleteExceptMain(_PyRuntimeState *runtime) |
525 | { |
526 | struct _gilstate_runtime_state *gilstate = &runtime->gilstate; |
527 | struct pyinterpreters *interpreters = &runtime->interpreters; |
528 |
|
529 | PyThreadState *tstate = _PyThreadState_Swap(gilstate, NULL); |
530 | if (tstate != NULL && tstate->interp != interpreters->main) { Branch (530:9): [True: 0, False: 0]
Branch (530:27): [True: 0, False: 0]
|
531 | return _PyStatus_ERR("not main interpreter"); |
532 | } |
533 | |
534 | HEAD_LOCK(runtime); |
535 | PyInterpreterState *interp = interpreters->head; |
536 | interpreters->head = NULL; |
537 | while (interp != NULL) { Branch (537:12): [True: 0, False: 0]
|
538 | if (interp == interpreters->main) { Branch (538:13): [True: 0, False: 0]
|
539 | interpreters->main->next = NULL; |
540 | interpreters->head = interp; |
541 | interp = interp->next; |
542 | continue; |
543 | } |
544 | |
545 | PyInterpreterState_Clear(interp); // XXX must activate? |
546 | zapthreads(interp, 1); |
547 | if (interp->id_mutex != NULL) { Branch (547:13): [True: 0, False: 0]
|
548 | PyThread_free_lock(interp->id_mutex); |
549 | } |
550 | PyInterpreterState *prev_interp = interp; |
551 | interp = interp->next; |
552 | free_interpreter(prev_interp); |
553 | } |
554 | HEAD_UNLOCK(runtime); |
555 |
|
556 | if (interpreters->head == NULL) { Branch (556:9): [True: 0, False: 0]
|
557 | return _PyStatus_ERR("missing main interpreter"); |
558 | } |
559 | _PyThreadState_Swap(gilstate, tstate); |
560 | return _PyStatus_OK(); |
561 | } |
562 | #endif |
563 | |
564 | |
565 | PyInterpreterState * |
566 | PyInterpreterState_Get(void) |
567 | { |
568 | PyThreadState *tstate = _PyThreadState_GET(); |
569 | _Py_EnsureTstateNotNULL(tstate); |
570 | PyInterpreterState *interp = tstate->interp; |
571 | if (interp == NULL) { Branch (571:9): [True: 0, False: 6.47k]
|
572 | Py_FatalError("no current interpreter"); |
573 | } |
574 | return interp; |
575 | } |
576 | |
577 | |
578 | int64_t |
579 | PyInterpreterState_GetID(PyInterpreterState *interp) |
580 | { |
581 | if (interp == NULL) { Branch (581:9): [True: 0, False: 3.75k]
|
582 | PyErr_SetString(PyExc_RuntimeError, "no interpreter provided"); |
583 | return -1; |
584 | } |
585 | return interp->id; |
586 | } |
587 | |
588 | |
589 | static PyInterpreterState * |
590 | interp_look_up_id(_PyRuntimeState *runtime, int64_t requested_id) |
591 | { |
592 | PyInterpreterState *interp = runtime->interpreters.head; |
593 | while (interp != NULL) { Branch (593:12): [True: 1.99k, False: 90]
|
594 | int64_t id = PyInterpreterState_GetID(interp); |
595 | if (id < 0) { Branch (595:13): [True: 0, False: 1.99k]
|
596 | return NULL; |
597 | } |
598 | if (requested_id == id) { Branch (598:13): [True: 1.58k, False: 414]
|
599 | return interp; |
600 | } |
601 | interp = PyInterpreterState_Next(interp); |
602 | } |
603 | return NULL; |
604 | } |
605 | |
606 | PyInterpreterState * |
607 | _PyInterpreterState_LookUpID(int64_t requested_id) |
608 | { |
609 | PyInterpreterState *interp = NULL; |
610 | if (requested_id >= 0) { Branch (610:9): [True: 1.67k, False: 0]
|
611 | _PyRuntimeState *runtime = &_PyRuntime; |
612 | HEAD_LOCK(runtime); |
613 | interp = interp_look_up_id(runtime, requested_id); |
614 | HEAD_UNLOCK(runtime); |
615 | } |
616 | if (interp == NULL && !PyErr_Occurred()90 ) { Branch (616:9): [True: 90, False: 1.58k]
Branch (616:27): [True: 90, False: 0]
|
617 | PyErr_Format(PyExc_RuntimeError, |
618 | "unrecognized interpreter ID %lld", requested_id); |
619 | } |
620 | return interp; |
621 | } |
622 | |
623 | |
624 | int |
625 | _PyInterpreterState_IDInitref(PyInterpreterState *interp) |
626 | { |
627 | if (interp->id_mutex != NULL) { Branch (627:9): [True: 785, False: 122]
|
628 | return 0; |
629 | } |
630 | interp->id_mutex = PyThread_allocate_lock(); |
631 | if (interp->id_mutex == NULL) { Branch (631:9): [True: 0, False: 122]
|
632 | PyErr_SetString(PyExc_RuntimeError, |
633 | "failed to create init interpreter ID mutex"); |
634 | return -1; |
635 | } |
636 | interp->id_refcount = 0; |
637 | return 0; |
638 | } |
639 | |
640 | |
641 | int |
642 | _PyInterpreterState_IDIncref(PyInterpreterState *interp) |
643 | { |
644 | if (_PyInterpreterState_IDInitref(interp) < 0) { Branch (644:9): [True: 0, False: 464]
|
645 | return -1; |
646 | } |
647 | |
648 | PyThread_acquire_lock(interp->id_mutex, WAIT_LOCK); |
649 | interp->id_refcount += 1; |
650 | PyThread_release_lock(interp->id_mutex); |
651 | return 0; |
652 | } |
653 | |
654 | |
655 | void |
656 | _PyInterpreterState_IDDecref(PyInterpreterState *interp) |
657 | { |
658 | assert(interp->id_mutex != NULL); |
659 | |
660 | struct _gilstate_runtime_state *gilstate = &_PyRuntime.gilstate; |
661 | PyThread_acquire_lock(interp->id_mutex, WAIT_LOCK); |
662 | assert(interp->id_refcount != 0); |
663 | interp->id_refcount -= 1; |
664 | int64_t refcount = interp->id_refcount; |
665 | PyThread_release_lock(interp->id_mutex); |
666 | |
667 | if (refcount == 0 && interp->requires_idref291 ) { Branch (667:9): [True: 291, False: 102]
Branch (667:26): [True: 70, False: 221]
|
668 | // XXX Using the "head" thread isn't strictly correct. |
669 | PyThreadState *tstate = PyInterpreterState_ThreadHead(interp); |
670 | // XXX Possible GILState issues? |
671 | PyThreadState *save_tstate = _PyThreadState_Swap(gilstate, tstate); |
672 | Py_EndInterpreter(tstate); |
673 | _PyThreadState_Swap(gilstate, save_tstate); |
674 | } |
675 | } |
676 | |
677 | int |
678 | _PyInterpreterState_RequiresIDRef(PyInterpreterState *interp) |
679 | { |
680 | return interp->requires_idref; |
681 | } |
682 | |
683 | void |
684 | _PyInterpreterState_RequireIDRef(PyInterpreterState *interp, int required) |
685 | { |
686 | interp->requires_idref = required ? 1 : 00 ; Branch (686:30): [True: 121, False: 0]
|
687 | } |
688 | |
689 | PyObject * |
690 | _PyInterpreterState_GetMainModule(PyInterpreterState *interp) |
691 | { |
692 | if (interp->modules == NULL) { Branch (692:9): [True: 0, False: 61]
|
693 | PyErr_SetString(PyExc_RuntimeError, "interpreter not initialized"); |
694 | return NULL; |
695 | } |
696 | return PyMapping_GetItemString(interp->modules, "__main__"); |
697 | } |
698 | |
699 | PyObject * |
700 | PyInterpreterState_GetDict(PyInterpreterState *interp) |
701 | { |
702 | if (interp->dict == NULL) { Branch (702:9): [True: 0, False: 0]
|
703 | interp->dict = PyDict_New(); |
704 | if (interp->dict == NULL) { Branch (704:13): [True: 0, False: 0]
|
705 | PyErr_Clear(); |
706 | } |
707 | } |
708 | /* Returning NULL means no per-interpreter dict is available. */ |
709 | return interp->dict; |
710 | } |
711 | |
712 | /* Minimum size of data stack chunk */ |
713 | #define DATA_STACK_CHUNK_SIZE (16*1024) |
714 | |
715 | static _PyStackChunk* |
716 | allocate_chunk(int size_in_bytes, _PyStackChunk* previous) |
717 | { |
718 | assert(size_in_bytes % sizeof(PyObject **) == 0); |
719 | _PyStackChunk *res = _PyObject_VirtualAlloc(size_in_bytes); |
720 | if (res == NULL) { Branch (720:9): [True: 0, False: 13.1k]
|
721 | return NULL; |
722 | } |
723 | res->previous = previous; |
724 | res->size = size_in_bytes; |
725 | res->top = 0; |
726 | return res; |
727 | } |
728 | |
729 | static PyThreadState * |
730 | alloc_threadstate(void) |
731 | { |
732 | return PyMem_RawCalloc(1, sizeof(PyThreadState)); |
733 | } |
734 | |
735 | static void |
736 | free_threadstate(PyThreadState *tstate) |
737 | { |
738 | if (!tstate->_static) { Branch (738:9): [True: 0, False: 5.97k]
|
739 | PyMem_RawFree(tstate); |
740 | } |
741 | } |
742 | |
743 | /* Get the thread state to a minimal consistent state. |
744 | Further init happens in pylifecycle.c before it can be used. |
745 | All fields not initialized here are expected to be zeroed out, |
746 | e.g. by PyMem_RawCalloc() or memset(), or otherwise pre-initialized. |
747 | The interpreter state is not manipulated. Instead it is assumed that |
748 | the thread is getting added to the interpreter. |
749 | */ |
750 | |
751 | static void |
752 | init_threadstate(PyThreadState *tstate, |
753 | PyInterpreterState *interp, uint64_t id, |
754 | PyThreadState *next) |
755 | { |
756 | if (tstate->_initialized) { Branch (756:9): [True: 0, False: 5.98k]
|
757 | Py_FatalError("thread state already initialized"); |
758 | } |
759 | |
760 | assert(interp != NULL); |
761 | tstate->interp = interp; |
762 | |
763 | assert(id > 0); |
764 | tstate->id = id; |
765 | |
766 | assert(interp->threads.head == tstate); |
767 | assert((next != NULL && id != 1) || (next == NULL && id == 1)); |
768 | if (next != NULL) { Branch (768:9): [True: 5.70k, False: 278]
|
769 | assert(next->prev == NULL || next->prev == tstate); |
770 | next->prev = tstate; |
771 | } |
772 | tstate->next = next; |
773 | assert(tstate->prev == NULL); |
774 | |
775 | tstate->thread_id = PyThread_get_thread_ident(); |
776 | #ifdef PY_HAVE_THREAD_NATIVE_ID |
777 | tstate->native_thread_id = PyThread_get_thread_native_id(); |
778 | #endif |
779 | |
780 | tstate->recursion_limit = interp->ceval.recursion_limit, |
781 | tstate->recursion_remaining = interp->ceval.recursion_limit, |
782 | |
783 | tstate->exc_info = &tstate->exc_state; |
784 | |
785 | tstate->cframe = &tstate->root_cframe; |
786 | tstate->datastack_chunk = NULL; |
787 | tstate->datastack_top = NULL; |
788 | tstate->datastack_limit = NULL; |
789 | |
790 | tstate->_initialized = 1; |
791 | } |
792 | |
793 | static PyThreadState * |
794 | new_threadstate(PyInterpreterState *interp) |
795 | { |
796 | PyThreadState *tstate; |
797 | _PyRuntimeState *runtime = interp->runtime; |
798 | |
799 | /* We serialize concurrent creation to protect global state. */ |
800 | HEAD_LOCK(runtime); |
801 | |
802 | interp->threads.next_unique_id += 1; |
803 | uint64_t id = interp->threads.next_unique_id; |
804 | |
805 | // Allocate the thread state and add it to the interpreter. |
806 | PyThreadState *old_head = interp->threads.head; |
807 | if (old_head == NULL) { Branch (807:9): [True: 278, False: 5.70k]
|
808 | // It's the interpreter's initial thread state. |
809 | assert(id == 1); |
810 | |
811 | tstate = &interp->_initial_thread; |
812 | } |
813 | else { |
814 | // Every valid interpreter must have at least one thread. |
815 | assert(id > 1); |
816 | assert(old_head->prev == NULL); |
817 | |
818 | tstate = alloc_threadstate(); |
819 | if (tstate == NULL) { Branch (819:13): [True: 0, False: 5.70k]
|
820 | goto error; |
821 | } |
822 | // Set to _PyThreadState_INIT. |
823 | memcpy(tstate, |
824 | &initial._main_interpreter._initial_thread, |
825 | sizeof(*tstate)); |
826 | } |
827 | interp->threads.head = tstate; |
828 | |
829 | init_threadstate(tstate, interp, id, old_head); |
830 | |
831 | HEAD_UNLOCK(runtime); |
832 | return tstate; |
833 | |
834 | error: |
835 | HEAD_UNLOCK(runtime); |
836 | return NULL; |
837 | } |
838 | |
839 | PyThreadState * |
840 | PyThreadState_New(PyInterpreterState *interp) |
841 | { |
842 | PyThreadState *tstate = new_threadstate(interp); |
843 | _PyThreadState_SetCurrent(tstate); |
844 | return tstate; |
845 | } |
846 | |
847 | PyThreadState * |
848 | _PyThreadState_Prealloc(PyInterpreterState *interp) |
849 | { |
850 | return new_threadstate(interp); |
851 | } |
852 | |
853 | // We keep this around for (accidental) stable ABI compatibility. |
854 | // Realisically, no extensions are using it. |
855 | void |
856 | _PyThreadState_Init(PyThreadState *tstate) |
857 | { |
858 | Py_FatalError("_PyThreadState_Init() is for internal use only"); |
859 | } |
860 | |
861 | void |
862 | _PyThreadState_SetCurrent(PyThreadState *tstate) |
863 | { |
864 | _PyGILState_NoteThreadState(&tstate->interp->runtime->gilstate, tstate); |
865 | } |
866 | |
867 | PyObject* |
868 | PyState_FindModule(PyModuleDef* module) |
869 | { |
870 | Py_ssize_t index = module->m_base.m_index; |
871 | PyInterpreterState *state = _PyInterpreterState_GET(); |
872 | PyObject *res; |
873 | if (module->m_slots) { Branch (873:9): [True: 2, False: 459k]
|
874 | return NULL; |
875 | } |
876 | if (index == 0) Branch (876:9): [True: 2, False: 459k]
|
877 | return NULL; |
878 | if (state->modules_by_index == NULL) Branch (878:9): [True: 0, False: 459k]
|
879 | return NULL; |
880 | if (index >= PyList_GET_SIZE(state->modules_by_index)) Branch (880:9): [True: 7, False: 459k]
|
881 | return NULL; |
882 | res = PyList_GET_ITEM(state->modules_by_index, index); |
883 | return res==Py_None ? NULL : res; Branch (883:12): [True: 0, False: 459k]
|
884 | } |
885 | |
886 | int |
887 | _PyState_AddModule(PyThreadState *tstate, PyObject* module, PyModuleDef* def) |
888 | { |
889 | if (!def) { Branch (889:9): [True: 0, False: 960]
|
890 | assert(_PyErr_Occurred(tstate)); |
891 | return -1; |
892 | } |
893 | if (def->m_slots) { Branch (893:9): [True: 2, False: 958]
|
894 | _PyErr_SetString(tstate, |
895 | PyExc_SystemError, |
896 | "PyState_AddModule called on module with slots"); |
897 | return -1; |
898 | } |
899 | |
900 | PyInterpreterState *interp = tstate->interp; |
901 | if (!interp->modules_by_index) { Branch (901:9): [True: 278, False: 680]
|
902 | interp->modules_by_index = PyList_New(0); |
903 | if (!interp->modules_by_index) { Branch (903:13): [True: 0, False: 278]
|
904 | return -1; |
905 | } |
906 | } |
907 | |
908 | while (958 PyList_GET_SIZE(interp->modules_by_index) <= def->m_base.m_index) { Branch (908:12): [True: 5.32k, False: 958]
|
909 | if (PyList_Append(interp->modules_by_index, Py_None) < 0) { Branch (909:13): [True: 0, False: 5.32k]
|
910 | return -1; |
911 | } |
912 | } |
913 | |
914 | Py_INCREF(module); |
915 | return PyList_SetItem(interp->modules_by_index, |
916 | def->m_base.m_index, module); |
917 | } |
918 | |
919 | int |
920 | PyState_AddModule(PyObject* module, PyModuleDef* def) |
921 | { |
922 | if (!def) { Branch (922:9): [True: 0, False: 3]
|
923 | Py_FatalError("module definition is NULL"); |
924 | return -1; |
925 | } |
926 | |
927 | PyThreadState *tstate = _PyThreadState_GET(); |
928 | PyInterpreterState *interp = tstate->interp; |
929 | Py_ssize_t index = def->m_base.m_index; |
930 | if (interp->modules_by_index && Branch (930:9): [True: 3, False: 0]
|
931 | index < PyList_GET_SIZE(interp->modules_by_index) && Branch (931:9): [True: 2, False: 1]
|
932 | module == 2 PyList_GET_ITEM2 (interp->modules_by_index, index)) Branch (932:9): [True: 0, False: 2]
|
933 | { |
934 | _Py_FatalErrorFormat(__func__, "module %p already added", module); |
935 | return -1; |
936 | } |
937 | return _PyState_AddModule(tstate, module, def); |
938 | } |
939 | |
940 | int |
941 | PyState_RemoveModule(PyModuleDef* def) |
942 | { |
943 | PyThreadState *tstate = _PyThreadState_GET(); |
944 | PyInterpreterState *interp = tstate->interp; |
945 | |
946 | if (def->m_slots) { Branch (946:9): [True: 2, False: 0]
|
947 | _PyErr_SetString(tstate, |
948 | PyExc_SystemError, |
949 | "PyState_RemoveModule called on module with slots"); |
950 | return -1; |
951 | } |
952 | |
953 | Py_ssize_t index = def->m_base.m_index; |
954 | if (index == 0) { Branch (954:9): [True: 0, False: 0]
|
955 | Py_FatalError("invalid module index"); |
956 | } |
957 | if (interp->modules_by_index == NULL) { Branch (957:9): [True: 0, False: 0]
|
958 | Py_FatalError("Interpreters module-list not accessible."); |
959 | } |
960 | if (index > PyList_GET_SIZE(interp->modules_by_index)) { Branch (960:9): [True: 0, False: 0]
|
961 | Py_FatalError("Module index out of bounds."); |
962 | } |
963 | |
964 | Py_INCREF(Py_None); |
965 | return PyList_SetItem(interp->modules_by_index, index, Py_None); |
966 | } |
967 | |
968 | // Used by finalize_modules() |
969 | void |
970 | _PyInterpreterState_ClearModules(PyInterpreterState *interp) |
971 | { |
972 | if (!interp->modules_by_index) { Branch (972:9): [True: 0, False: 272]
|
973 | return; |
974 | } |
975 | |
976 | Py_ssize_t i; |
977 | for (i = 0; i < PyList_GET_SIZE(interp->modules_by_index); i++5.26k ) { Branch (977:17): [True: 5.26k, False: 272]
|
978 | PyObject *m = PyList_GET_ITEM(interp->modules_by_index, i); |
979 | if (PyModule_Check(m)) { |
980 | /* cleanup the saved copy of module dicts */ |
981 | PyModuleDef *md = PyModule_GetDef(m); |
982 | if (md) { Branch (982:17): [True: 879, False: 45]
|
983 | Py_CLEAR(md->m_base.m_copy); |
984 | } |
985 | } |
986 | } |
987 | |
988 | /* Setting modules_by_index to NULL could be dangerous, so we |
989 | clear the list instead. */ |
990 | if (PyList_SetSlice(interp->modules_by_index, Branch (990:9): [True: 0, False: 272]
|
991 | 0, PyList_GET_SIZE(interp->modules_by_index), |
992 | NULL)) { |
993 | PyErr_WriteUnraisable(interp->modules_by_index); |
994 | } |
995 | } |
996 | |
997 | void |
998 | PyThreadState_Clear(PyThreadState *tstate) |
999 | { |
1000 | int verbose = _PyInterpreterState_GetConfig(tstate->interp)->verbose; |
1001 | |
1002 | if (verbose && tstate->cframe->current_frame != NULL4 ) { Branch (1002:9): [True: 4, False: 5.97k]
Branch (1002:20): [True: 0, False: 4]
|
1003 | /* bpo-20526: After the main thread calls |
1004 | _PyRuntimeState_SetFinalizing() in Py_FinalizeEx(), threads must |
1005 | exit when trying to take the GIL. If a thread exit in the middle of |
1006 | _PyEval_EvalFrameDefault(), tstate->frame is not reset to its |
1007 | previous value. It is more likely with daemon threads, but it can |
1008 | happen with regular threads if threading._shutdown() fails |
1009 | (ex: interrupted by CTRL+C). */ |
1010 | fprintf(stderr, |
1011 | "PyThreadState_Clear: warning: thread still has a frame\n"); |
1012 | } |
1013 | |
1014 | /* Don't clear tstate->pyframe: it is a borrowed reference */ |
1015 | |
1016 | Py_CLEAR(tstate->dict); |
1017 | Py_CLEAR(tstate->async_exc); |
1018 | |
1019 | Py_CLEAR(tstate->curexc_type); |
1020 | Py_CLEAR(tstate->curexc_value); |
1021 | Py_CLEAR(tstate->curexc_traceback); |
1022 | |
1023 | Py_CLEAR(tstate->exc_state.exc_value); |
1024 | |
1025 | /* The stack of exception states should contain just this thread. */ |
1026 | if (verbose && tstate->exc_info != &tstate->exc_state4 ) { Branch (1026:9): [True: 4, False: 5.97k]
Branch (1026:20): [True: 0, False: 4]
|
1027 | fprintf(stderr, |
1028 | "PyThreadState_Clear: warning: thread still has a generator\n"); |
1029 | } |
1030 | |
1031 | tstate->c_profilefunc = NULL; |
1032 | tstate->c_tracefunc = NULL; |
1033 | Py_CLEAR(tstate->c_profileobj); |
1034 | Py_CLEAR(tstate->c_traceobj); |
1035 | |
1036 | Py_CLEAR(tstate->async_gen_firstiter); |
1037 | Py_CLEAR(tstate->async_gen_finalizer); |
1038 | |
1039 | Py_CLEAR(tstate->context); |
1040 | |
1041 | if (tstate->on_delete != NULL) { Branch (1041:9): [True: 4.78k, False: 1.19k]
|
1042 | tstate->on_delete(tstate->on_delete_data); |
1043 | } |
1044 | } |
1045 | |
1046 | |
1047 | /* Common code for PyThreadState_Delete() and PyThreadState_DeleteCurrent() */ |
1048 | static void |
1049 | tstate_delete_common(PyThreadState *tstate, |
1050 | struct _gilstate_runtime_state *gilstate) |
1051 | { |
1052 | _Py_EnsureTstateNotNULL(tstate); |
1053 | PyInterpreterState *interp = tstate->interp; |
1054 | if (interp == NULL) { Branch (1054:9): [True: 0, False: 5.97k]
|
1055 | Py_FatalError("NULL interpreter"); |
1056 | } |
1057 | _PyRuntimeState *runtime = interp->runtime; |
1058 | |
1059 | HEAD_LOCK(runtime); |
1060 | if (tstate->prev) { Branch (1060:9): [True: 1.63k, False: 4.34k]
|
1061 | tstate->prev->next = tstate->next; |
1062 | } |
1063 | else { |
1064 | interp->threads.head = tstate->next; |
1065 | } |
1066 | if (tstate->next) { Branch (1066:9): [True: 5.70k, False: 272]
|
1067 | tstate->next->prev = tstate->prev; |
1068 | } |
1069 | HEAD_UNLOCK(runtime); |
1070 | |
1071 | if (gilstate->autoInterpreterState && Branch (1071:9): [True: 5.87k, False: 103]
|
1072 | PyThread_tss_get(&gilstate->autoTSSkey) == tstate5.87k ) Branch (1072:9): [True: 5.70k, False: 169]
|
1073 | { |
1074 | PyThread_tss_set(&gilstate->autoTSSkey, NULL); |
1075 | } |
1076 | _PyStackChunk *chunk = tstate->datastack_chunk; |
1077 | tstate->datastack_chunk = NULL; |
1078 | while (chunk != NULL) { Branch (1078:12): [True: 5.97k, False: 5.97k]
|
1079 | _PyStackChunk *prev = chunk->previous; |
1080 | _PyObject_VirtualFree(chunk, chunk->size); |
1081 | chunk = prev; |
1082 | } |
1083 | } |
1084 | |
1085 | static void |
1086 | _PyThreadState_Delete(PyThreadState *tstate, int check_current) |
1087 | { |
1088 | struct _gilstate_runtime_state *gilstate = &tstate->interp->runtime->gilstate; |
1089 | if (check_current) { Branch (1089:9): [True: 0, False: 272]
|
1090 | if (tstate == _PyRuntimeGILState_GetThreadState(gilstate)) { Branch (1090:13): [True: 0, False: 0]
|
1091 | _Py_FatalErrorFormat(__func__, "tstate %p is still current", tstate); |
1092 | } |
1093 | } |
1094 | tstate_delete_common(tstate, gilstate); |
1095 | free_threadstate(tstate); |
1096 | } |
1097 | |
1098 | |
1099 | void |
1100 | PyThreadState_Delete(PyThreadState *tstate) |
1101 | { |
1102 | _PyThreadState_Delete(tstate, 1); |
1103 | } |
1104 | |
1105 | |
1106 | void |
1107 | _PyThreadState_DeleteCurrent(PyThreadState *tstate) |
1108 | { |
1109 | _Py_EnsureTstateNotNULL(tstate); |
1110 | struct _gilstate_runtime_state *gilstate = &tstate->interp->runtime->gilstate; |
1111 | tstate_delete_common(tstate, gilstate); |
1112 | _PyRuntimeGILState_SetThreadState(gilstate, NULL); |
1113 | _PyEval_ReleaseLock(tstate); |
1114 | free_threadstate(tstate); |
1115 | } |
1116 | |
1117 | void |
1118 | PyThreadState_DeleteCurrent(void) |
1119 | { |
1120 | struct _gilstate_runtime_state *gilstate = &_PyRuntime.gilstate; |
1121 | PyThreadState *tstate = _PyRuntimeGILState_GetThreadState(gilstate); |
1122 | _PyThreadState_DeleteCurrent(tstate); |
1123 | } |
1124 | |
1125 | |
1126 | /* |
1127 | * Delete all thread states except the one passed as argument. |
1128 | * Note that, if there is a current thread state, it *must* be the one |
1129 | * passed as argument. Also, this won't touch any other interpreters |
1130 | * than the current one, since we don't know which thread state should |
1131 | * be kept in those other interpreters. |
1132 | */ |
1133 | void |
1134 | _PyThreadState_DeleteExcept(_PyRuntimeState *runtime, PyThreadState *tstate) |
1135 | { |
1136 | PyInterpreterState *interp = tstate->interp; |
1137 | |
1138 | HEAD_LOCK(runtime); |
1139 | /* Remove all thread states, except tstate, from the linked list of |
1140 | thread states. This will allow calling PyThreadState_Clear() |
1141 | without holding the lock. */ |
1142 | PyThreadState *list = interp->threads.head; |
1143 | if (list == tstate) { Branch (1143:9): [True: 104, False: 0]
|
1144 | list = tstate->next; |
1145 | } |
1146 | if (tstate->prev) { Branch (1146:9): [True: 0, False: 104]
|
1147 | tstate->prev->next = tstate->next; |
1148 | } |
1149 | if (tstate->next) { Branch (1149:9): [True: 0, False: 104]
|
1150 | tstate->next->prev = tstate->prev; |
1151 | } |
1152 | tstate->prev = tstate->next = NULL; |
1153 | interp->threads.head = tstate; |
1154 | HEAD_UNLOCK(runtime); |
1155 | |
1156 | /* Clear and deallocate all stale thread states. Even if this |
1157 | executes Python code, we should be safe since it executes |
1158 | in the current thread, not one of the stale threads. */ |
1159 | PyThreadState *p, *next; |
1160 | for (p = list; p; p = next0 ) { Branch (1160:20): [True: 0, False: 104]
|
1161 | next = p->next; |
1162 | PyThreadState_Clear(p); |
1163 | free_threadstate(p); |
1164 | } |
1165 | } |
1166 | |
1167 | |
1168 | PyThreadState * |
1169 | _PyThreadState_UncheckedGet(void) |
1170 | { |
1171 | return _PyThreadState_GET(); |
1172 | } |
1173 | |
1174 | |
1175 | PyThreadState * |
1176 | PyThreadState_Get(void) |
1177 | { |
1178 | PyThreadState *tstate = _PyThreadState_GET(); |
1179 | _Py_EnsureTstateNotNULL(tstate); |
1180 | return tstate; |
1181 | } |
1182 | |
1183 | |
1184 | PyThreadState * |
1185 | _PyThreadState_Swap(struct _gilstate_runtime_state *gilstate, PyThreadState *newts) |
1186 | { |
1187 | PyThreadState *oldts = _PyRuntimeGILState_GetThreadState(gilstate); |
1188 | |
1189 | _PyRuntimeGILState_SetThreadState(gilstate, newts); |
1190 | /* It should not be possible for more than one thread state |
1191 | to be used for a thread. Check this the best we can in debug |
1192 | builds. |
1193 | */ |
1194 | #if defined(Py_DEBUG) |
1195 | if (newts) { |
1196 | /* This can be called from PyEval_RestoreThread(). Similar |
1197 | to it, we need to ensure errno doesn't change. |
1198 | */ |
1199 | int err = errno; |
1200 | PyThreadState *check = _PyGILState_GetThisThreadState(gilstate); |
1201 | if (check && check->interp == newts->interp && check != newts) |
1202 | Py_FatalError("Invalid thread state for this thread"); |
1203 | errno = err; |
1204 | } |
1205 | #endif |
1206 | return oldts; |
1207 | } |
1208 | |
1209 | PyThreadState * |
1210 | PyThreadState_Swap(PyThreadState *newts) |
1211 | { |
1212 | return _PyThreadState_Swap(&_PyRuntime.gilstate, newts); |
1213 | } |
1214 | |
1215 | /* An extension mechanism to store arbitrary additional per-thread state. |
1216 | PyThreadState_GetDict() returns a dictionary that can be used to hold such |
1217 | state; the caller should pick a unique key and store its state there. If |
1218 | PyThreadState_GetDict() returns NULL, an exception has *not* been raised |
1219 | and the caller should assume no per-thread state is available. */ |
1220 | |
1221 | PyObject * |
1222 | _PyThreadState_GetDict(PyThreadState *tstate) |
1223 | { |
1224 | assert(tstate != NULL); |
1225 | if (tstate->dict == NULL) { Branch (1225:9): [True: 322, False: 148k]
|
1226 | tstate->dict = PyDict_New(); |
1227 | if (tstate->dict == NULL) { Branch (1227:13): [True: 0, False: 322]
|
1228 | _PyErr_Clear(tstate); |
1229 | } |
1230 | } |
1231 | return tstate->dict; |
1232 | } |
1233 | |
1234 | |
1235 | PyObject * |
1236 | PyThreadState_GetDict(void) |
1237 | { |
1238 | PyThreadState *tstate = _PyThreadState_GET(); |
1239 | if (tstate == NULL) { Branch (1239:9): [True: 0, False: 138k]
|
1240 | return NULL; |
1241 | } |
1242 | return _PyThreadState_GetDict(tstate); |
1243 | } |
1244 | |
1245 | |
1246 | PyInterpreterState * |
1247 | PyThreadState_GetInterpreter(PyThreadState *tstate) |
1248 | { |
1249 | assert(tstate != NULL); |
1250 | return tstate->interp; |
1251 | } |
1252 | |
1253 | |
1254 | PyFrameObject* |
1255 | PyThreadState_GetFrame(PyThreadState *tstate) |
1256 | { |
1257 | assert(tstate != NULL); |
1258 | if (tstate->cframe->current_frame == NULL) { Branch (1258:9): [True: 0, False: 2.91k]
|
1259 | return NULL; |
1260 | } |
1261 | PyFrameObject *frame = _PyFrame_GetFrameObject(tstate->cframe->current_frame); |
1262 | if (frame == NULL) { Branch (1262:9): [True: 0, False: 2.91k]
|
1263 | PyErr_Clear(); |
1264 | } |
1265 | Py_XINCREF(frame); |
1266 | return frame; |
1267 | } |
1268 | |
1269 | |
1270 | uint64_t |
1271 | PyThreadState_GetID(PyThreadState *tstate) |
1272 | { |
1273 | assert(tstate != NULL); |
1274 | return tstate->id; |
1275 | } |
1276 | |
1277 | |
1278 | /* Asynchronously raise an exception in a thread. |
1279 | Requested by Just van Rossum and Alex Martelli. |
1280 | To prevent naive misuse, you must write your own extension |
1281 | to call this, or use ctypes. Must be called with the GIL held. |
1282 | Returns the number of tstates modified (normally 1, but 0 if `id` didn't |
1283 | match any known thread id). Can be called with exc=NULL to clear an |
1284 | existing async exception. This raises no exceptions. */ |
1285 | |
1286 | int |
1287 | PyThreadState_SetAsyncExc(unsigned long id, PyObject *exc) |
1288 | { |
1289 | _PyRuntimeState *runtime = &_PyRuntime; |
1290 | PyInterpreterState *interp = _PyRuntimeState_GetThreadState(runtime)->interp; |
1291 | |
1292 | /* Although the GIL is held, a few C API functions can be called |
1293 | * without the GIL held, and in particular some that create and |
1294 | * destroy thread and interpreter states. Those can mutate the |
1295 | * list of thread states we're traversing, so to prevent that we lock |
1296 | * head_mutex for the duration. |
1297 | */ |
1298 | HEAD_LOCK(runtime); |
1299 | for (PyThreadState *tstate = interp->threads.head; tstate != NULL; tstate = tstate->next2 ) { Branch (1299:56): [True: 4, False: 1]
|
1300 | if (tstate->thread_id != id) { Branch (1300:13): [True: 2, False: 2]
|
1301 | continue; |
1302 | } |
1303 | |
1304 | /* Tricky: we need to decref the current value |
1305 | * (if any) in tstate->async_exc, but that can in turn |
1306 | * allow arbitrary Python code to run, including |
1307 | * perhaps calls to this function. To prevent |
1308 | * deadlock, we need to release head_mutex before |
1309 | * the decref. |
1310 | */ |
1311 | PyObject *old_exc = tstate->async_exc; |
1312 | Py_XINCREF(exc); |
1313 | tstate->async_exc = exc; |
1314 | HEAD_UNLOCK(runtime); |
1315 | |
1316 | Py_XDECREF(old_exc); |
1317 | _PyEval_SignalAsyncExc(tstate->interp); |
1318 | return 1; |
1319 | } |
1320 | HEAD_UNLOCK(runtime); |
1321 | return 0; |
1322 | } |
1323 | |
1324 | /* Routines for advanced debuggers, requested by David Beazley. |
1325 | Don't use unless you know what you are doing! */ |
1326 | |
1327 | PyInterpreterState * |
1328 | PyInterpreterState_Head(void) |
1329 | { |
1330 | return _PyRuntime.interpreters.head; |
1331 | } |
1332 | |
1333 | PyInterpreterState * |
1334 | PyInterpreterState_Main(void) |
1335 | { |
1336 | return _PyInterpreterState_Main(); |
1337 | } |
1338 | |
1339 | PyInterpreterState * |
1340 | PyInterpreterState_Next(PyInterpreterState *interp) { |
1341 | return interp->next; |
1342 | } |
1343 | |
1344 | PyThreadState * |
1345 | PyInterpreterState_ThreadHead(PyInterpreterState *interp) { |
1346 | return interp->threads.head; |
1347 | } |
1348 | |
1349 | PyThreadState * |
1350 | PyThreadState_Next(PyThreadState *tstate) { |
1351 | return tstate->next; |
1352 | } |
1353 | |
1354 | /* The implementation of sys._current_frames(). This is intended to be |
1355 | called with the GIL held, as it will be when called via |
1356 | sys._current_frames(). It's possible it would work fine even without |
1357 | the GIL held, but haven't thought enough about that. |
1358 | */ |
1359 | PyObject * |
1360 | _PyThread_CurrentFrames(void) |
1361 | { |
1362 | PyThreadState *tstate = _PyThreadState_GET(); |
1363 | if (_PySys_Audit(tstate, "sys._current_frames", NULL) < 0) { Branch (1363:9): [True: 0, False: 1]
|
1364 | return NULL; |
1365 | } |
1366 | |
1367 | PyObject *result = PyDict_New(); |
1368 | if (result == NULL) { Branch (1368:9): [True: 0, False: 1]
|
1369 | return NULL; |
1370 | } |
1371 | |
1372 | /* for i in all interpreters: |
1373 | * for t in all of i's thread states: |
1374 | * if t's frame isn't NULL, map t's id to its frame |
1375 | * Because these lists can mutate even when the GIL is held, we |
1376 | * need to grab head_mutex for the duration. |
1377 | */ |
1378 | _PyRuntimeState *runtime = tstate->interp->runtime; |
1379 | HEAD_LOCK(runtime); |
1380 | PyInterpreterState *i; |
1381 | for (i = runtime->interpreters.head; i != NULL; i = i->next1 ) { Branch (1381:42): [True: 1, False: 1]
|
1382 | PyThreadState *t; |
1383 | for (t = i->threads.head; t != NULL; t = t->next2 ) { Branch (1383:35): [True: 2, False: 1]
|
1384 | _PyInterpreterFrame *frame = t->cframe->current_frame; |
1385 | if (frame == NULL) { Branch (1385:17): [True: 0, False: 2]
|
1386 | continue; |
1387 | } |
1388 | PyObject *id = PyLong_FromUnsignedLong(t->thread_id); |
1389 | if (id == NULL) { Branch (1389:17): [True: 0, False: 2]
|
1390 | goto fail; |
1391 | } |
1392 | int stat = PyDict_SetItem(result, id, (PyObject *)_PyFrame_GetFrameObject(frame)); |
1393 | Py_DECREF(id); |
1394 | if (stat < 0) { Branch (1394:17): [True: 0, False: 2]
|
1395 | goto fail; |
1396 | } |
1397 | } |
1398 | } |
1399 | goto done; |
1400 | |
1401 | fail: |
1402 | Py_CLEAR(result); |
1403 |
|
1404 | done: |
1405 | HEAD_UNLOCK(runtime); |
1406 | return result; |
1407 | } |
1408 | |
1409 | PyObject * |
1410 | _PyThread_CurrentExceptions(void) |
1411 | { |
1412 | PyThreadState *tstate = _PyThreadState_GET(); |
1413 | |
1414 | _Py_EnsureTstateNotNULL(tstate); |
1415 | |
1416 | if (_PySys_Audit(tstate, "sys._current_exceptions", NULL) < 0) { Branch (1416:9): [True: 0, False: 1]
|
1417 | return NULL; |
1418 | } |
1419 | |
1420 | PyObject *result = PyDict_New(); |
1421 | if (result == NULL) { Branch (1421:9): [True: 0, False: 1]
|
1422 | return NULL; |
1423 | } |
1424 | |
1425 | /* for i in all interpreters: |
1426 | * for t in all of i's thread states: |
1427 | * if t's frame isn't NULL, map t's id to its frame |
1428 | * Because these lists can mutate even when the GIL is held, we |
1429 | * need to grab head_mutex for the duration. |
1430 | */ |
1431 | _PyRuntimeState *runtime = tstate->interp->runtime; |
1432 | HEAD_LOCK(runtime); |
1433 | PyInterpreterState *i; |
1434 | for (i = runtime->interpreters.head; i != NULL; i = i->next1 ) { Branch (1434:42): [True: 1, False: 1]
|
1435 | PyThreadState *t; |
1436 | for (t = i->threads.head; t != NULL; t = t->next2 ) { Branch (1436:35): [True: 2, False: 1]
|
1437 | _PyErr_StackItem *err_info = _PyErr_GetTopmostException(t); |
1438 | if (err_info == NULL) { Branch (1438:17): [True: 0, False: 2]
|
1439 | continue; |
1440 | } |
1441 | PyObject *id = PyLong_FromUnsignedLong(t->thread_id); |
1442 | if (id == NULL) { Branch (1442:17): [True: 0, False: 2]
|
1443 | goto fail; |
1444 | } |
1445 | PyObject *exc_info = _PyErr_StackItemToExcInfoTuple(err_info); |
1446 | if (exc_info == NULL) { Branch (1446:17): [True: 0, False: 2]
|
1447 | Py_DECREF(id); |
1448 | goto fail; |
1449 | } |
1450 | int stat = PyDict_SetItem(result, id, exc_info); |
1451 | Py_DECREF(id); |
1452 | Py_DECREF(exc_info); |
1453 | if (stat < 0) { Branch (1453:17): [True: 0, False: 2]
|
1454 | goto fail; |
1455 | } |
1456 | } |
1457 | } |
1458 | goto done; |
1459 | |
1460 | fail: |
1461 | Py_CLEAR(result); |
1462 |
|
1463 | done: |
1464 | HEAD_UNLOCK(runtime); |
1465 | return result; |
1466 | } |
1467 | |
1468 | /* Python "auto thread state" API. */ |
1469 | |
1470 | /* Keep this as a static, as it is not reliable! It can only |
1471 | ever be compared to the state for the *current* thread. |
1472 | * If not equal, then it doesn't matter that the actual |
1473 | value may change immediately after comparison, as it can't |
1474 | possibly change to the current thread's state. |
1475 | * If equal, then the current thread holds the lock, so the value can't |
1476 | change until we yield the lock. |
1477 | */ |
1478 | static int |
1479 | PyThreadState_IsCurrent(PyThreadState *tstate) |
1480 | { |
1481 | /* Must be the tstate for this thread */ |
1482 | struct _gilstate_runtime_state *gilstate = &_PyRuntime.gilstate; |
1483 | assert(_PyGILState_GetThisThreadState(gilstate) == tstate); |
1484 | return tstate == _PyRuntimeGILState_GetThreadState(gilstate); |
1485 | } |
1486 | |
1487 | /* Internal initialization/finalization functions called by |
1488 | Py_Initialize/Py_FinalizeEx |
1489 | */ |
1490 | PyStatus |
1491 | _PyGILState_Init(_PyRuntimeState *runtime) |
1492 | { |
1493 | struct _gilstate_runtime_state *gilstate = &runtime->gilstate; |
1494 | if (PyThread_tss_create(&gilstate->autoTSSkey) != 0) { Branch (1494:9): [True: 0, False: 107]
|
1495 | return _PyStatus_NO_MEMORY(); |
1496 | } |
1497 | // PyThreadState_New() calls _PyGILState_NoteThreadState() which does |
1498 | // nothing before autoInterpreterState is set. |
1499 | assert(gilstate->autoInterpreterState == NULL); |
1500 | return _PyStatus_OK(); |
1501 | } |
1502 | |
1503 | |
1504 | PyStatus |
1505 | _PyGILState_SetTstate(PyThreadState *tstate) |
1506 | { |
1507 | if (!_Py_IsMainInterpreter(tstate->interp)) { Branch (1507:9): [True: 171, False: 107]
|
1508 | /* Currently, PyGILState is shared by all interpreters. The main |
1509 | * interpreter is responsible to initialize it. */ |
1510 | return _PyStatus_OK(); |
1511 | } |
1512 | |
1513 | /* must init with valid states */ |
1514 | assert(tstate != NULL); |
1515 | assert(tstate->interp != NULL); |
1516 | |
1517 | struct _gilstate_runtime_state *gilstate = &tstate->interp->runtime->gilstate; |
1518 | |
1519 | gilstate->autoInterpreterState = tstate->interp; |
1520 | assert(PyThread_tss_get(&gilstate->autoTSSkey) == NULL); |
1521 | assert(tstate->gilstate_counter == 0); |
1522 | |
1523 | _PyGILState_NoteThreadState(gilstate, tstate); |
1524 | return _PyStatus_OK(); |
1525 | } |
1526 | |
1527 | PyInterpreterState * |
1528 | _PyGILState_GetInterpreterStateUnsafe(void) |
1529 | { |
1530 | return _PyRuntime.gilstate.autoInterpreterState; |
1531 | } |
1532 | |
1533 | void |
1534 | _PyGILState_Fini(PyInterpreterState *interp) |
1535 | { |
1536 | struct _gilstate_runtime_state *gilstate = &interp->runtime->gilstate; |
1537 | PyThread_tss_delete(&gilstate->autoTSSkey); |
1538 | gilstate->autoInterpreterState = NULL; |
1539 | } |
1540 | |
1541 | #ifdef HAVE_FORK |
1542 | /* Reset the TSS key - called by PyOS_AfterFork_Child(). |
1543 | * This should not be necessary, but some - buggy - pthread implementations |
1544 | * don't reset TSS upon fork(), see issue #10517. |
1545 | */ |
1546 | PyStatus |
1547 | _PyGILState_Reinit(_PyRuntimeState *runtime) |
1548 | { |
1549 | struct _gilstate_runtime_state *gilstate = &runtime->gilstate; |
1550 | PyThreadState *tstate = _PyGILState_GetThisThreadState(gilstate); |
1551 |
|
1552 | PyThread_tss_delete(&gilstate->autoTSSkey); |
1553 | if (PyThread_tss_create(&gilstate->autoTSSkey) != 0) { Branch (1553:9): [True: 0, False: 0]
|
1554 | return _PyStatus_NO_MEMORY(); |
1555 | } |
1556 | |
1557 | /* If the thread had an associated auto thread state, reassociate it with |
1558 | * the new key. */ |
1559 | if (tstate && Branch (1559:9): [True: 0, False: 0]
|
1560 | PyThread_tss_set(&gilstate->autoTSSkey, (void *)tstate) != 0) Branch (1560:9): [True: 0, False: 0]
|
1561 | { |
1562 | return _PyStatus_ERR("failed to set autoTSSkey"); |
1563 | } |
1564 | return _PyStatus_OK(); |
1565 | } |
1566 | #endif |
1567 | |
1568 | /* When a thread state is created for a thread by some mechanism other than |
1569 | PyGILState_Ensure, it's important that the GILState machinery knows about |
1570 | it so it doesn't try to create another thread state for the thread (this is |
1571 | a better fix for SF bug #1010677 than the first one attempted). |
1572 | */ |
1573 | static void |
1574 | _PyGILState_NoteThreadState(struct _gilstate_runtime_state *gilstate, PyThreadState* tstate) |
1575 | { |
1576 | /* If autoTSSkey isn't initialized, this must be the very first |
1577 | threadstate created in Py_Initialize(). Don't do anything for now |
1578 | (we'll be back here when _PyGILState_Init is called). */ |
1579 | if (!gilstate->autoInterpreterState) { Branch (1579:9): [True: 107, False: 5.98k]
|
1580 | return; |
1581 | } |
1582 | |
1583 | /* Stick the thread state for this thread in thread specific storage. |
1584 | |
1585 | The only situation where you can legitimately have more than one |
1586 | thread state for an OS level thread is when there are multiple |
1587 | interpreters. |
1588 | |
1589 | You shouldn't really be using the PyGILState_ APIs anyway (see issues |
1590 | #10915 and #15751). |
1591 | |
1592 | The first thread state created for that given OS level thread will |
1593 | "win", which seems reasonable behaviour. |
1594 | */ |
1595 | if (PyThread_tss_get(&gilstate->autoTSSkey) == NULL) { Branch (1595:9): [True: 5.81k, False: 170]
|
1596 | if ((PyThread_tss_set(&gilstate->autoTSSkey, (void *)tstate)) != 0) { Branch (1596:13): [True: 0, False: 5.81k]
|
1597 | Py_FatalError("Couldn't create autoTSSkey mapping"); |
1598 | } |
1599 | } |
1600 | |
1601 | /* PyGILState_Release must not try to delete this thread state. */ |
1602 | tstate->gilstate_counter = 1; |
1603 | } |
1604 | |
1605 | /* The public functions */ |
1606 | static PyThreadState * |
1607 | _PyGILState_GetThisThreadState(struct _gilstate_runtime_state *gilstate) |
1608 | { |
1609 | if (gilstate->autoInterpreterState == NULL) Branch (1609:9): [True: 0, False: 1.87M]
|
1610 | return NULL; |
1611 | return (PyThreadState *)PyThread_tss_get(&gilstate->autoTSSkey); |
1612 | } |
1613 | |
1614 | PyThreadState * |
1615 | PyGILState_GetThisThreadState(void) |
1616 | { |
1617 | return _PyGILState_GetThisThreadState(&_PyRuntime.gilstate); |
1618 | } |
1619 | |
1620 | int |
1621 | PyGILState_Check(void) |
1622 | { |
1623 | struct _gilstate_runtime_state *gilstate = &_PyRuntime.gilstate; |
1624 | if (!gilstate->check_enabled) { Branch (1624:9): [True: 0, False: 320k]
|
1625 | return 1; |
1626 | } |
1627 | |
1628 | if (!PyThread_tss_is_created(&gilstate->autoTSSkey)) { Branch (1628:9): [True: 0, False: 320k]
|
1629 | return 1; |
1630 | } |
1631 | |
1632 | PyThreadState *tstate = _PyRuntimeGILState_GetThreadState(gilstate); |
1633 | if (tstate == NULL) { Branch (1633:9): [True: 0, False: 320k]
|
1634 | return 0; |
1635 | } |
1636 | |
1637 | return (tstate == _PyGILState_GetThisThreadState(gilstate)); |
1638 | } |
1639 | |
1640 | PyGILState_STATE |
1641 | PyGILState_Ensure(void) |
1642 | { |
1643 | _PyRuntimeState *runtime = &_PyRuntime; |
1644 | struct _gilstate_runtime_state *gilstate = &runtime->gilstate; |
1645 | |
1646 | /* Note that we do not auto-init Python here - apart from |
1647 | potential races with 2 threads auto-initializing, pep-311 |
1648 | spells out other issues. Embedders are expected to have |
1649 | called Py_Initialize(). */ |
1650 | |
1651 | /* Ensure that _PyEval_InitThreads() and _PyGILState_Init() have been |
1652 | called by Py_Initialize() */ |
1653 | assert(_PyEval_ThreadsInitialized(runtime)); |
1654 | assert(gilstate->autoInterpreterState); |
1655 | |
1656 | PyThreadState *tcur = (PyThreadState *)PyThread_tss_get(&gilstate->autoTSSkey); |
1657 | int current; |
1658 | if (tcur == NULL) { Branch (1658:9): [True: 6, False: 2.33k]
|
1659 | /* Create a new Python thread state for this thread */ |
1660 | tcur = PyThreadState_New(gilstate->autoInterpreterState); |
1661 | if (tcur == NULL) { Branch (1661:13): [True: 0, False: 6]
|
1662 | Py_FatalError("Couldn't create thread-state for new thread"); |
1663 | } |
1664 | |
1665 | /* This is our thread state! We'll need to delete it in the |
1666 | matching call to PyGILState_Release(). */ |
1667 | tcur->gilstate_counter = 0; |
1668 | current = 0; /* new thread state is never current */ |
1669 | } |
1670 | else { |
1671 | current = PyThreadState_IsCurrent(tcur); |
1672 | } |
1673 | |
1674 | if (current == 0) { Branch (1674:9): [True: 1.79k, False: 537]
|
1675 | PyEval_RestoreThread(tcur); |
1676 | } |
1677 | |
1678 | /* Update our counter in the thread-state - no need for locks: |
1679 | - tcur will remain valid as we hold the GIL. |
1680 | - the counter is safe as we are the only thread "allowed" |
1681 | to modify this value |
1682 | */ |
1683 | ++tcur->gilstate_counter; |
1684 | |
1685 | return current ? PyGILState_LOCKED537 : PyGILState_UNLOCKED1.79k ; Branch (1685:12): [True: 537, False: 1.79k]
|
1686 | } |
1687 | |
1688 | void |
1689 | PyGILState_Release(PyGILState_STATE oldstate) |
1690 | { |
1691 | _PyRuntimeState *runtime = &_PyRuntime; |
1692 | PyThreadState *tstate = PyThread_tss_get(&runtime->gilstate.autoTSSkey); |
1693 | if (tstate == NULL) { Branch (1693:9): [True: 0, False: 2.33k]
|
1694 | Py_FatalError("auto-releasing thread-state, " |
1695 | "but no thread-state for this thread"); |
1696 | } |
1697 | |
1698 | /* We must hold the GIL and have our thread state current */ |
1699 | /* XXX - remove the check - the assert should be fine, |
1700 | but while this is very new (April 2003), the extra check |
1701 | by release-only users can't hurt. |
1702 | */ |
1703 | if (!PyThreadState_IsCurrent(tstate)) { Branch (1703:9): [True: 0, False: 2.33k]
|
1704 | _Py_FatalErrorFormat(__func__, |
1705 | "thread state %p must be current when releasing", |
1706 | tstate); |
1707 | } |
1708 | assert(PyThreadState_IsCurrent(tstate)); |
1709 | --tstate->gilstate_counter; |
1710 | assert(tstate->gilstate_counter >= 0); /* illegal counter value */ |
1711 | |
1712 | /* If we're going to destroy this thread-state, we must |
1713 | * clear it while the GIL is held, as destructors may run. |
1714 | */ |
1715 | if (tstate->gilstate_counter == 0) { Branch (1715:9): [True: 6, False: 2.33k]
|
1716 | /* can't have been locked when we created it */ |
1717 | assert(oldstate == PyGILState_UNLOCKED); |
1718 | PyThreadState_Clear(tstate); |
1719 | /* Delete the thread-state. Note this releases the GIL too! |
1720 | * It's vital that the GIL be held here, to avoid shutdown |
1721 | * races; see bugs 225673 and 1061968 (that nasty bug has a |
1722 | * habit of coming back). |
1723 | */ |
1724 | assert(_PyRuntimeGILState_GetThreadState(&runtime->gilstate) == tstate); |
1725 | _PyThreadState_DeleteCurrent(tstate); |
1726 | } |
1727 | /* Release the lock if necessary */ |
1728 | else if (oldstate == PyGILState_UNLOCKED) Branch (1728:14): [True: 1.79k, False: 537]
|
1729 | PyEval_SaveThread(); |
1730 | } |
1731 | |
1732 | |
1733 | /**************************/ |
1734 | /* cross-interpreter data */ |
1735 | /**************************/ |
1736 | |
1737 | /* cross-interpreter data */ |
1738 | |
1739 | crossinterpdatafunc _PyCrossInterpreterData_Lookup(PyObject *); |
1740 | |
1741 | /* This is a separate func from _PyCrossInterpreterData_Lookup in order |
1742 | to keep the registry code separate. */ |
1743 | static crossinterpdatafunc |
1744 | _lookup_getdata(PyObject *obj) |
1745 | { |
1746 | crossinterpdatafunc getdata = _PyCrossInterpreterData_Lookup(obj); |
1747 | if (getdata == NULL && PyErr_Occurred() == 024 ) Branch (1747:9): [True: 24, False: 617]
Branch (1747:28): [True: 24, False: 0]
|
1748 | PyErr_Format(PyExc_ValueError, |
1749 | "%S does not support cross-interpreter data", obj); |
1750 | return getdata; |
1751 | } |
1752 | |
1753 | int |
1754 | _PyObject_CheckCrossInterpreterData(PyObject *obj) |
1755 | { |
1756 | crossinterpdatafunc getdata = _lookup_getdata(obj); |
1757 | if (getdata == NULL) { Branch (1757:9): [True: 24, False: 10]
|
1758 | return -1; |
1759 | } |
1760 | return 0; |
1761 | } |
1762 | |
1763 | static int |
1764 | _check_xidata(PyThreadState *tstate, _PyCrossInterpreterData *data) |
1765 | { |
1766 | // data->data can be anything, including NULL, so we don't check it. |
1767 | |
1768 | // data->obj may be NULL, so we don't check it. |
1769 | |
1770 | if (data->interp < 0) { Branch (1770:9): [True: 0, False: 604]
|
1771 | _PyErr_SetString(tstate, PyExc_SystemError, "missing interp"); |
1772 | return -1; |
1773 | } |
1774 | |
1775 | if (data->new_object == NULL) { Branch (1775:9): [True: 0, False: 604]
|
1776 | _PyErr_SetString(tstate, PyExc_SystemError, "missing new_object func"); |
1777 | return -1; |
1778 | } |
1779 | |
1780 | // data->free may be NULL, so we don't check it. |
1781 | |
1782 | return 0; |
1783 | } |
1784 | |
1785 | int |
1786 | _PyObject_GetCrossInterpreterData(PyObject *obj, _PyCrossInterpreterData *data) |
1787 | { |
1788 | PyThreadState *tstate = _PyThreadState_GET(); |
1789 | #ifdef Py_DEBUG |
1790 | // The caller must hold the GIL |
1791 | _Py_EnsureTstateNotNULL(tstate); |
1792 | #endif |
1793 | PyInterpreterState *interp = tstate->interp; |
1794 | |
1795 | // Reset data before re-populating. |
1796 | *data = (_PyCrossInterpreterData){0}; |
1797 | data->free = PyMem_RawFree; // Set a default that may be overridden. |
1798 | |
1799 | // Call the "getdata" func for the object. |
1800 | Py_INCREF(obj); |
1801 | crossinterpdatafunc getdata = _lookup_getdata(obj); |
1802 | if (getdata == NULL) { Branch (1802:9): [True: 0, False: 607]
|
1803 | Py_DECREF(obj); |
1804 | return -1; |
1805 | } |
1806 | int res = getdata(obj, data); |
1807 | Py_DECREF(obj); |
1808 | if (res != 0) { Branch (1808:9): [True: 3, False: 604]
|
1809 | return -1; |
1810 | } |
1811 | |
1812 | // Fill in the blanks and validate the result. |
1813 | data->interp = interp->id; |
1814 | if (_check_xidata(tstate, data) != 0) { Branch (1814:9): [True: 0, False: 604]
|
1815 | _PyCrossInterpreterData_Release(data); |
1816 | return -1; |
1817 | } |
1818 | |
1819 | return 0; |
1820 | } |
1821 | |
1822 | static void |
1823 | _release_xidata(void *arg) |
1824 | { |
1825 | _PyCrossInterpreterData *data = (_PyCrossInterpreterData *)arg; |
1826 | if (data->free != NULL) { Branch (1826:9): [True: 335, False: 263]
|
1827 | data->free(data->data); |
1828 | } |
1829 | Py_XDECREF(data->obj); |
1830 | } |
1831 | |
1832 | static void |
1833 | _call_in_interpreter(struct _gilstate_runtime_state *gilstate, |
1834 | PyInterpreterState *interp, |
1835 | void (*func)(void *), void *arg) |
1836 | { |
1837 | /* We would use Py_AddPendingCall() if it weren't specific to the |
1838 | * main interpreter (see bpo-33608). In the meantime we take a |
1839 | * naive approach. |
1840 | */ |
1841 | PyThreadState *save_tstate = NULL; |
1842 | if (interp != _PyRuntimeGILState_GetThreadState(gilstate)->interp) { Branch (1842:9): [True: 15, False: 583]
|
1843 | // XXX Using the "head" thread isn't strictly correct. |
1844 | PyThreadState *tstate = PyInterpreterState_ThreadHead(interp); |
1845 | // XXX Possible GILState issues? |
1846 | save_tstate = _PyThreadState_Swap(gilstate, tstate); |
1847 | } |
1848 | |
1849 | func(arg); |
1850 | |
1851 | // Switch back. |
1852 | if (save_tstate != NULL) { Branch (1852:9): [True: 15, False: 583]
|
1853 | _PyThreadState_Swap(gilstate, save_tstate); |
1854 | } |
1855 | } |
1856 | |
1857 | void |
1858 | _PyCrossInterpreterData_Release(_PyCrossInterpreterData *data) |
1859 | { |
1860 | if (data->data == NULL && data->obj == NULL6 ) { Branch (1860:9): [True: 6, False: 598]
Branch (1860:31): [True: 6, False: 0]
|
1861 | // Nothing to release! |
1862 | return; |
1863 | } |
1864 | |
1865 | // Switch to the original interpreter. |
1866 | PyInterpreterState *interp = _PyInterpreterState_LookUpID(data->interp); |
1867 | if (interp == NULL) { Branch (1867:9): [True: 0, False: 598]
|
1868 | // The interpreter was already destroyed. |
1869 | if (data->free != NULL) { Branch (1869:13): [True: 0, False: 0]
|
1870 | // XXX Someone leaked some memory... |
1871 | } |
1872 | return; |
1873 | } |
1874 | |
1875 | // "Release" the data and/or the object. |
1876 | struct _gilstate_runtime_state *gilstate = &_PyRuntime.gilstate; |
1877 | _call_in_interpreter(gilstate, interp, _release_xidata, data); |
1878 | } |
1879 | |
1880 | PyObject * |
1881 | _PyCrossInterpreterData_NewObject(_PyCrossInterpreterData *data) |
1882 | { |
1883 | return data->new_object(data); |
1884 | } |
1885 | |
1886 | /* registry of {type -> crossinterpdatafunc} */ |
1887 | |
1888 | /* For now we use a global registry of shareable classes. An |
1889 | alternative would be to add a tp_* slot for a class's |
1890 | crossinterpdatafunc. It would be simpler and more efficient. */ |
1891 | |
1892 | static int |
1893 | _register_xidata(struct _xidregistry *xidregistry, PyTypeObject *cls, |
1894 | crossinterpdatafunc getdata) |
1895 | { |
1896 | // Note that we effectively replace already registered classes |
1897 | // rather than failing. |
1898 | struct _xidregitem *newhead = PyMem_RawMalloc(sizeof(struct _xidregitem)); |
1899 | if (newhead == NULL) Branch (1899:9): [True: 0, False: 5]
|
1900 | return -1; |
1901 | newhead->cls = cls; |
1902 | newhead->getdata = getdata; |
1903 | newhead->next = xidregistry->head; |
1904 | xidregistry->head = newhead; |
1905 | return 0; |
1906 | } |
1907 | |
1908 | static void _register_builtins_for_crossinterpreter_data(struct _xidregistry *xidregistry); |
1909 | |
1910 | int |
1911 | _PyCrossInterpreterData_RegisterClass(PyTypeObject *cls, |
1912 | crossinterpdatafunc getdata) |
1913 | { |
1914 | if (!PyType_Check(cls)) { Branch (1914:9): [True: 0, False: 1]
|
1915 | PyErr_Format(PyExc_ValueError, "only classes may be registered"); |
1916 | return -1; |
1917 | } |
1918 | if (getdata == NULL) { Branch (1918:9): [True: 0, False: 1]
|
1919 | PyErr_Format(PyExc_ValueError, "missing 'getdata' func"); |
1920 | return -1; |
1921 | } |
1922 | |
1923 | // Make sure the class isn't ever deallocated. |
1924 | Py_INCREF((PyObject *)cls); |
1925 | |
1926 | struct _xidregistry *xidregistry = &_PyRuntime.xidregistry ; |
1927 | PyThread_acquire_lock(xidregistry->mutex, WAIT_LOCK); |
1928 | if (xidregistry->head == NULL) { Branch (1928:9): [True: 1, False: 0]
|
1929 | _register_builtins_for_crossinterpreter_data(xidregistry); |
1930 | } |
1931 | int res = _register_xidata(xidregistry, cls, getdata); |
1932 | PyThread_release_lock(xidregistry->mutex); |
1933 | return res; |
1934 | } |
1935 | |
1936 | /* Cross-interpreter objects are looked up by exact match on the class. |
1937 | We can reassess this policy when we move from a global registry to a |
1938 | tp_* slot. */ |
1939 | |
1940 | crossinterpdatafunc |
1941 | _PyCrossInterpreterData_Lookup(PyObject *obj) |
1942 | { |
1943 | struct _xidregistry *xidregistry = &_PyRuntime.xidregistry ; |
1944 | PyObject *cls = PyObject_Type(obj); |
1945 | crossinterpdatafunc getdata = NULL; |
1946 | PyThread_acquire_lock(xidregistry->mutex, WAIT_LOCK); |
1947 | struct _xidregitem *cur = xidregistry->head; |
1948 | if (cur == NULL) { Branch (1948:9): [True: 0, False: 641]
|
1949 | _register_builtins_for_crossinterpreter_data(xidregistry); |
1950 | cur = xidregistry->head; |
1951 | } |
1952 | for(; cur != NULL; cur = cur->next1.62k ) { Branch (1952:11): [True: 2.23k, False: 24]
|
1953 | if (cur->cls == (PyTypeObject *)cls) { Branch (1953:13): [True: 617, False: 1.62k]
|
1954 | getdata = cur->getdata; |
1955 | break; |
1956 | } |
1957 | } |
1958 | Py_DECREF(cls); |
1959 | PyThread_release_lock(xidregistry->mutex); |
1960 | return getdata; |
1961 | } |
1962 | |
1963 | /* cross-interpreter data for builtin types */ |
1964 | |
1965 | struct _shared_bytes_data { |
1966 | char *bytes; |
1967 | Py_ssize_t len; |
1968 | }; |
1969 | |
1970 | static PyObject * |
1971 | _new_bytes_object(_PyCrossInterpreterData *data) |
1972 | { |
1973 | struct _shared_bytes_data *shared = (struct _shared_bytes_data *)(data->data); |
1974 | return PyBytes_FromStringAndSize(shared->bytes, shared->len); |
1975 | } |
1976 | |
1977 | static int |
1978 | _bytes_shared(PyObject *obj, _PyCrossInterpreterData *data) |
1979 | { |
1980 | struct _shared_bytes_data *shared = PyMem_NEW(struct _shared_bytes_data, 1); |
1981 | if (PyBytes_AsStringAndSize(obj, &shared->bytes, &shared->len) < 0) { Branch (1981:9): [True: 0, False: 322]
|
1982 | return -1; |
1983 | } |
1984 | data->data = (void *)shared; |
1985 | Py_INCREF(obj); |
1986 | data->obj = obj; // Will be "released" (decref'ed) when data released. |
1987 | data->new_object = _new_bytes_object; |
1988 | data->free = PyMem_Free; |
1989 | return 0; |
1990 | } |
1991 | |
1992 | struct _shared_str_data { |
1993 | int kind; |
1994 | const void *buffer; |
1995 | Py_ssize_t len; |
1996 | }; |
1997 | |
1998 | static PyObject * |
1999 | _new_str_object(_PyCrossInterpreterData *data) |
2000 | { |
2001 | struct _shared_str_data *shared = (struct _shared_str_data *)(data->data); |
2002 | return PyUnicode_FromKindAndData(shared->kind, shared->buffer, shared->len); |
2003 | } |
2004 | |
2005 | static int |
2006 | _str_shared(PyObject *obj, _PyCrossInterpreterData *data) |
2007 | { |
2008 | struct _shared_str_data *shared = PyMem_NEW(struct _shared_str_data, 1); |
2009 | shared->kind = PyUnicode_KIND(obj); |
2010 | shared->buffer = PyUnicode_DATA(obj); |
2011 | shared->len = PyUnicode_GET_LENGTH(obj); |
2012 | data->data = (void *)shared; |
2013 | Py_INCREF(obj); |
2014 | data->obj = obj; // Will be "released" (decref'ed) when data released. |
2015 | data->new_object = _new_str_object; |
2016 | data->free = PyMem_Free; |
2017 | return 0; |
2018 | } |
2019 | |
2020 | static PyObject * |
2021 | _new_long_object(_PyCrossInterpreterData *data) |
2022 | { |
2023 | return PyLong_FromSsize_t((Py_ssize_t)(data->data)); |
2024 | } |
2025 | |
2026 | static int |
2027 | _long_shared(PyObject *obj, _PyCrossInterpreterData *data) |
2028 | { |
2029 | /* Note that this means the size of shareable ints is bounded by |
2030 | * sys.maxsize. Hence on 32-bit architectures that is half the |
2031 | * size of maximum shareable ints on 64-bit. |
2032 | */ |
2033 | Py_ssize_t value = PyLong_AsSsize_t(obj); |
2034 | if (value == -1 && PyErr_Occurred()4 ) { Branch (2034:9): [True: 4, False: 263]
Branch (2034:24): [True: 3, False: 1]
|
2035 | if (PyErr_ExceptionMatches(PyExc_OverflowError)) { Branch (2035:13): [True: 3, False: 0]
|
2036 | PyErr_SetString(PyExc_OverflowError, "try sending as bytes"); |
2037 | } |
2038 | return -1; |
2039 | } |
2040 | data->data = (void *)value; |
2041 | data->obj = NULL; |
2042 | data->new_object = _new_long_object; |
2043 | data->free = NULL; |
2044 | return 0; |
2045 | } |
2046 | |
2047 | static PyObject * |
2048 | _new_none_object(_PyCrossInterpreterData *data) |
2049 | { |
2050 | // XXX Singleton refcounts are problematic across interpreters... |
2051 | Py_INCREF(Py_None); |
2052 | return Py_None; |
2053 | } |
2054 | |
2055 | static int |
2056 | _none_shared(PyObject *obj, _PyCrossInterpreterData *data) |
2057 | { |
2058 | data->data = NULL; |
2059 | // data->obj remains NULL |
2060 | data->new_object = _new_none_object; |
2061 | data->free = NULL; // There is nothing to free. |
2062 | return 0; |
2063 | } |
2064 | |
2065 | static void |
2066 | _register_builtins_for_crossinterpreter_data(struct _xidregistry *xidregistry) |
2067 | { |
2068 | // None |
2069 | if (_register_xidata(xidregistry, (PyTypeObject *)PyObject_Type(Py_None), _none_shared) != 0) { Branch (2069:9): [True: 0, False: 1]
|
2070 | Py_FatalError("could not register None for cross-interpreter sharing"); |
2071 | } |
2072 | |
2073 | // int |
2074 | if (_register_xidata(xidregistry, &PyLong_Type, _long_shared) != 0) { Branch (2074:9): [True: 0, False: 1]
|
2075 | Py_FatalError("could not register int for cross-interpreter sharing"); |
2076 | } |
2077 | |
2078 | // bytes |
2079 | if (_register_xidata(xidregistry, &PyBytes_Type, _bytes_shared) != 0) { Branch (2079:9): [True: 0, False: 1]
|
2080 | Py_FatalError("could not register bytes for cross-interpreter sharing"); |
2081 | } |
2082 | |
2083 | // str |
2084 | if (_register_xidata(xidregistry, &PyUnicode_Type, _str_shared) != 0) { Branch (2084:9): [True: 0, False: 1]
|
2085 | Py_FatalError("could not register str for cross-interpreter sharing"); |
2086 | } |
2087 | } |
2088 | |
2089 | |
2090 | _PyFrameEvalFunction |
2091 | _PyInterpreterState_GetEvalFrameFunc(PyInterpreterState *interp) |
2092 | { |
2093 | if (interp->eval_frame == NULL) { Branch (2093:9): [True: 0, False: 0]
|
2094 | return _PyEval_EvalFrameDefault; |
2095 | } |
2096 | return interp->eval_frame; |
2097 | } |
2098 | |
2099 | |
2100 | void |
2101 | _PyInterpreterState_SetEvalFrameFunc(PyInterpreterState *interp, |
2102 | _PyFrameEvalFunction eval_frame) |
2103 | { |
2104 | if (eval_frame == _PyEval_EvalFrameDefault) { Branch (2104:9): [True: 2, False: 2]
|
2105 | interp->eval_frame = NULL; |
2106 | } |
2107 | else { |
2108 | interp->eval_frame = eval_frame; |
2109 | } |
2110 | } |
2111 | |
2112 | |
2113 | const PyConfig* |
2114 | _PyInterpreterState_GetConfig(PyInterpreterState *interp) |
2115 | { |
2116 | return &interp->config; |
2117 | } |
2118 | |
2119 | |
2120 | int |
2121 | _PyInterpreterState_GetConfigCopy(PyConfig *config) |
2122 | { |
2123 | PyInterpreterState *interp = PyInterpreterState_Get(); |
2124 | |
2125 | PyStatus status = _PyConfig_Copy(config, &interp->config); |
2126 | if (PyStatus_Exception(status)) { Branch (2126:9): [True: 0, False: 53]
|
2127 | _PyErr_SetFromPyStatus(status); |
2128 | return -1; |
2129 | } |
2130 | return 0; |
2131 | } |
2132 | |
2133 | |
2134 | const PyConfig* |
2135 | _Py_GetConfig(void) |
2136 | { |
2137 | assert(PyGILState_Check()); |
2138 | PyThreadState *tstate = _PyThreadState_GET(); |
2139 | _Py_EnsureTstateNotNULL(tstate); |
2140 | return _PyInterpreterState_GetConfig(tstate->interp); |
2141 | } |
2142 | |
2143 | #define MINIMUM_OVERHEAD 1000 |
2144 | |
2145 | static PyObject ** |
2146 | push_chunk(PyThreadState *tstate, int size) |
2147 | { |
2148 | int allocate_size = DATA_STACK_CHUNK_SIZE; |
2149 | while (allocate_size < (int)sizeof(PyObject*)*(size + MINIMUM_OVERHEAD)) { Branch (2149:12): [True: 2, False: 13.1k]
|
2150 | allocate_size *= 2; |
2151 | } |
2152 | _PyStackChunk *new = allocate_chunk(allocate_size, tstate->datastack_chunk); |
2153 | if (new == NULL) { Branch (2153:9): [True: 0, False: 13.1k]
|
2154 | return NULL; |
2155 | } |
2156 | if (tstate->datastack_chunk) { Branch (2156:9): [True: 7.16k, False: 5.98k]
|
2157 | tstate->datastack_chunk->top = tstate->datastack_top - |
2158 | &tstate->datastack_chunk->data[0]; |
2159 | } |
2160 | tstate->datastack_chunk = new; |
2161 | tstate->datastack_limit = (PyObject **)(((char *)new) + allocate_size); |
2162 | // When new is the "root" chunk (i.e. new->previous == NULL), we can keep |
2163 | // _PyThreadState_PopFrame from freeing it later by "skipping" over the |
2164 | // first element: |
2165 | PyObject **res = &new->data[new->previous == NULL]; |
2166 | tstate->datastack_top = res + size; |
2167 | return res; |
2168 | } |
2169 | |
2170 | _PyInterpreterFrame * |
2171 | _PyThreadState_PushFrame(PyThreadState *tstate, size_t size) |
2172 | { |
2173 | assert(size < INT_MAX/sizeof(PyObject *)); |
2174 | PyObject **base = tstate->datastack_top; |
2175 | PyObject **top = base + size; |
2176 | if (top >= tstate->datastack_limit) { Branch (2176:9): [True: 13.1k, False: 81.2M]
|
2177 | base = push_chunk(tstate, (int)size); |
2178 | } |
2179 | else { |
2180 | tstate->datastack_top = top; |
2181 | } |
2182 | return (_PyInterpreterFrame *)base; |
2183 | } |
2184 | |
2185 | void |
2186 | _PyThreadState_PopFrame(PyThreadState *tstate, _PyInterpreterFrame * frame) |
2187 | { |
2188 | assert(tstate->datastack_chunk); |
2189 | PyObject **base = (PyObject **)frame; |
2190 | if (base == &tstate->datastack_chunk->data[0]) { Branch (2190:9): [True: 7.16k, False: 178M]
|
2191 | _PyStackChunk *chunk = tstate->datastack_chunk; |
2192 | _PyStackChunk *previous = chunk->previous; |
2193 | // push_chunk ensures that the root chunk is never popped: |
2194 | assert(previous); |
2195 | tstate->datastack_top = &previous->data[previous->top]; |
2196 | tstate->datastack_chunk = previous; |
2197 | _PyObject_VirtualFree(chunk, chunk->size); |
2198 | tstate->datastack_limit = (PyObject **)(((char *)previous) + previous->size); |
2199 | } |
2200 | else { |
2201 | assert(tstate->datastack_top); |
2202 | assert(tstate->datastack_top >= base); |
2203 | tstate->datastack_top = base; |
2204 | } |
2205 | } |
2206 | |
2207 | |
2208 | #ifdef __cplusplus |
2209 | } |
2210 | #endif |