Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 1 | |
| 2 | /* Thread and interpreter state structures and their interfaces */ |
| 3 | |
| 4 | #include "Python.h" |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 5 | #include "internal/pystate.h" |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 6 | |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 7 | #define GET_TSTATE() \ |
| 8 | ((PyThreadState*)_Py_atomic_load_relaxed(&_PyThreadState_Current)) |
| 9 | #define SET_TSTATE(value) \ |
Benjamin Peterson | ca47063 | 2016-09-06 13:47:26 -0700 | [diff] [blame] | 10 | _Py_atomic_store_relaxed(&_PyThreadState_Current, (uintptr_t)(value)) |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 11 | #define GET_INTERP_STATE() \ |
| 12 | (GET_TSTATE()->interp) |
| 13 | |
Victor Stinner | bfd316e | 2016-01-20 11:12:38 +0100 | [diff] [blame] | 14 | |
Tim Peters | 8470558 | 2004-10-10 02:47:33 +0000 | [diff] [blame] | 15 | /* -------------------------------------------------------------------------- |
| 16 | CAUTION |
| 17 | |
Victor Stinner | 1a7425f | 2013-07-07 16:25:15 +0200 | [diff] [blame] | 18 | Always use PyMem_RawMalloc() and PyMem_RawFree() directly in this file. A |
| 19 | number of these functions are advertised as safe to call when the GIL isn't |
| 20 | held, and in a debug build Python redirects (e.g.) PyMem_NEW (etc) to Python's |
| 21 | debugging obmalloc functions. Those aren't thread-safe (they rely on the GIL |
| 22 | to avoid the expense of doing their own locking). |
Tim Peters | 8470558 | 2004-10-10 02:47:33 +0000 | [diff] [blame] | 23 | -------------------------------------------------------------------------- */ |
| 24 | |
Martin v. Löwis | f0473d5 | 2001-07-18 16:17:16 +0000 | [diff] [blame] | 25 | #ifdef HAVE_DLOPEN |
| 26 | #ifdef HAVE_DLFCN_H |
| 27 | #include <dlfcn.h> |
| 28 | #endif |
Serhiy Storchaka | c2f7d87 | 2016-05-04 09:44:44 +0300 | [diff] [blame] | 29 | #if !HAVE_DECL_RTLD_LAZY |
Martin v. Löwis | f0473d5 | 2001-07-18 16:17:16 +0000 | [diff] [blame] | 30 | #define RTLD_LAZY 1 |
| 31 | #endif |
| 32 | #endif |
| 33 | |
Benjamin Peterson | 43162b8 | 2012-04-13 11:58:27 -0400 | [diff] [blame] | 34 | #ifdef __cplusplus |
| 35 | extern "C" { |
| 36 | #endif |
Martin v. Löwis | f0473d5 | 2001-07-18 16:17:16 +0000 | [diff] [blame] | 37 | |
Victor Stinner | 5d39e04 | 2017-11-29 17:20:38 +0100 | [diff] [blame] | 38 | static _PyInitError |
| 39 | _PyRuntimeState_Init_impl(_PyRuntimeState *runtime) |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 40 | { |
| 41 | memset(runtime, 0, sizeof(*runtime)); |
Victor Stinner | 8a1be61 | 2016-03-14 22:07:55 +0100 | [diff] [blame] | 42 | |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 43 | _PyGC_Initialize(&runtime->gc); |
| 44 | _PyEval_Initialize(&runtime->ceval); |
Michael W. Hudson | 188d436 | 2005-06-20 16:52:57 +0000 | [diff] [blame] | 45 | |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 46 | runtime->gilstate.check_enabled = 1; |
Victor Stinner | f7e5b56 | 2017-11-15 15:48:08 -0800 | [diff] [blame] | 47 | |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 48 | /* A TSS key must be initialized with Py_tss_NEEDS_INIT |
| 49 | in accordance with the specification. */ |
Victor Stinner | f7e5b56 | 2017-11-15 15:48:08 -0800 | [diff] [blame] | 50 | Py_tss_t initial = Py_tss_NEEDS_INIT; |
| 51 | runtime->gilstate.autoTSSkey = initial; |
Guido van Rossum | 1d5ad90 | 1999-06-18 14:22:24 +0000 | [diff] [blame] | 52 | |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 53 | runtime->interpreters.mutex = PyThread_allocate_lock(); |
Victor Stinner | f7e5b56 | 2017-11-15 15:48:08 -0800 | [diff] [blame] | 54 | if (runtime->interpreters.mutex == NULL) { |
| 55 | return _Py_INIT_ERR("Can't initialize threads for interpreter"); |
| 56 | } |
| 57 | |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 58 | runtime->interpreters.next_id = -1; |
Victor Stinner | f7e5b56 | 2017-11-15 15:48:08 -0800 | [diff] [blame] | 59 | return _Py_INIT_OK(); |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 60 | } |
Eric Snow | 05351c1 | 2017-09-05 21:43:08 -0700 | [diff] [blame] | 61 | |
Victor Stinner | 5d39e04 | 2017-11-29 17:20:38 +0100 | [diff] [blame] | 62 | _PyInitError |
| 63 | _PyRuntimeState_Init(_PyRuntimeState *runtime) |
| 64 | { |
| 65 | /* Force default allocator, since _PyRuntimeState_Fini() must |
| 66 | use the same allocator than this function. */ |
| 67 | PyMemAllocatorEx old_alloc; |
| 68 | _PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| 69 | |
| 70 | _PyInitError err = _PyRuntimeState_Init_impl(runtime); |
| 71 | |
| 72 | PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| 73 | return err; |
| 74 | } |
| 75 | |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 76 | void |
| 77 | _PyRuntimeState_Fini(_PyRuntimeState *runtime) |
| 78 | { |
Victor Stinner | 5d39e04 | 2017-11-29 17:20:38 +0100 | [diff] [blame] | 79 | /* Force the allocator used by _PyRuntimeState_Init(). */ |
| 80 | PyMemAllocatorEx old_alloc; |
| 81 | _PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
Victor Stinner | ccb0442 | 2017-11-16 03:20:31 -0800 | [diff] [blame] | 82 | |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 83 | if (runtime->interpreters.mutex != NULL) { |
| 84 | PyThread_free_lock(runtime->interpreters.mutex); |
| 85 | runtime->interpreters.mutex = NULL; |
| 86 | } |
Victor Stinner | ccb0442 | 2017-11-16 03:20:31 -0800 | [diff] [blame] | 87 | |
| 88 | PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | #define HEAD_LOCK() PyThread_acquire_lock(_PyRuntime.interpreters.mutex, \ |
| 92 | WAIT_LOCK) |
| 93 | #define HEAD_UNLOCK() PyThread_release_lock(_PyRuntime.interpreters.mutex) |
Eric Snow | 05351c1 | 2017-09-05 21:43:08 -0700 | [diff] [blame] | 94 | |
Michael W. Hudson | 188d436 | 2005-06-20 16:52:57 +0000 | [diff] [blame] | 95 | static void _PyGILState_NoteThreadState(PyThreadState* tstate); |
| 96 | |
Victor Stinner | a7368ac | 2017-11-15 18:11:45 -0800 | [diff] [blame] | 97 | _PyInitError |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 98 | _PyInterpreterState_Enable(_PyRuntimeState *runtime) |
Eric Snow | e377416 | 2017-05-22 19:46:40 -0700 | [diff] [blame] | 99 | { |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 100 | runtime->interpreters.next_id = 0; |
| 101 | /* Since we only call _PyRuntimeState_Init() once per process |
| 102 | (see _PyRuntime_Initialize()), we make sure the mutex is |
| 103 | initialized here. */ |
| 104 | if (runtime->interpreters.mutex == NULL) { |
| 105 | runtime->interpreters.mutex = PyThread_allocate_lock(); |
Victor Stinner | a7368ac | 2017-11-15 18:11:45 -0800 | [diff] [blame] | 106 | if (runtime->interpreters.mutex == NULL) { |
| 107 | return _Py_INIT_ERR("Can't initialize threads for interpreter"); |
| 108 | } |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 109 | } |
Victor Stinner | a7368ac | 2017-11-15 18:11:45 -0800 | [diff] [blame] | 110 | return _Py_INIT_OK(); |
Eric Snow | e377416 | 2017-05-22 19:46:40 -0700 | [diff] [blame] | 111 | } |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 112 | |
| 113 | PyInterpreterState * |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 114 | PyInterpreterState_New(void) |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 115 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 116 | PyInterpreterState *interp = (PyInterpreterState *) |
Victor Stinner | 1a7425f | 2013-07-07 16:25:15 +0200 | [diff] [blame] | 117 | PyMem_RawMalloc(sizeof(PyInterpreterState)); |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 118 | |
Victor Stinner | d434110 | 2017-11-23 00:12:09 +0100 | [diff] [blame] | 119 | if (interp == NULL) { |
| 120 | return NULL; |
| 121 | } |
| 122 | |
| 123 | |
| 124 | interp->modules = NULL; |
| 125 | interp->modules_by_index = NULL; |
| 126 | interp->sysdict = NULL; |
| 127 | interp->builtins = NULL; |
| 128 | interp->builtins_copy = NULL; |
| 129 | interp->tstate_head = NULL; |
| 130 | interp->check_interval = 100; |
| 131 | interp->num_threads = 0; |
| 132 | interp->pythread_stacksize = 0; |
| 133 | interp->codec_search_path = NULL; |
| 134 | interp->codec_search_cache = NULL; |
| 135 | interp->codec_error_registry = NULL; |
| 136 | interp->codecs_initialized = 0; |
| 137 | interp->fscodec_initialized = 0; |
| 138 | interp->core_config = _PyCoreConfig_INIT; |
| 139 | interp->config = _PyMainInterpreterConfig_INIT; |
| 140 | interp->importlib = NULL; |
| 141 | interp->import_func = NULL; |
| 142 | interp->eval_frame = _PyEval_EvalFrameDefault; |
| 143 | interp->co_extra_user_count = 0; |
Martin v. Löwis | f0473d5 | 2001-07-18 16:17:16 +0000 | [diff] [blame] | 144 | #ifdef HAVE_DLOPEN |
Serhiy Storchaka | c2f7d87 | 2016-05-04 09:44:44 +0300 | [diff] [blame] | 145 | #if HAVE_DECL_RTLD_NOW |
Victor Stinner | d434110 | 2017-11-23 00:12:09 +0100 | [diff] [blame] | 146 | interp->dlopenflags = RTLD_NOW; |
Martin v. Löwis | f0473d5 | 2001-07-18 16:17:16 +0000 | [diff] [blame] | 147 | #else |
Victor Stinner | d434110 | 2017-11-23 00:12:09 +0100 | [diff] [blame] | 148 | interp->dlopenflags = RTLD_LAZY; |
Martin v. Löwis | f0473d5 | 2001-07-18 16:17:16 +0000 | [diff] [blame] | 149 | #endif |
| 150 | #endif |
Antoine Pitrou | 346cbd3 | 2017-05-27 17:50:54 +0200 | [diff] [blame] | 151 | #ifdef HAVE_FORK |
Victor Stinner | d434110 | 2017-11-23 00:12:09 +0100 | [diff] [blame] | 152 | interp->before_forkers = NULL; |
| 153 | interp->after_forkers_parent = NULL; |
| 154 | interp->after_forkers_child = NULL; |
Antoine Pitrou | 346cbd3 | 2017-05-27 17:50:54 +0200 | [diff] [blame] | 155 | #endif |
Marcel Plch | 776407f | 2017-12-20 11:17:58 +0100 | [diff] [blame] | 156 | interp->pyexitfunc = NULL; |
| 157 | interp->pyexitmodule = NULL; |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 158 | |
Victor Stinner | d434110 | 2017-11-23 00:12:09 +0100 | [diff] [blame] | 159 | HEAD_LOCK(); |
| 160 | interp->next = _PyRuntime.interpreters.head; |
| 161 | if (_PyRuntime.interpreters.main == NULL) { |
| 162 | _PyRuntime.interpreters.main = interp; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 163 | } |
Victor Stinner | d434110 | 2017-11-23 00:12:09 +0100 | [diff] [blame] | 164 | _PyRuntime.interpreters.head = interp; |
| 165 | if (_PyRuntime.interpreters.next_id < 0) { |
| 166 | /* overflow or Py_Initialize() not called! */ |
| 167 | PyErr_SetString(PyExc_RuntimeError, |
| 168 | "failed to get an interpreter ID"); |
| 169 | interp = NULL; |
| 170 | } else { |
| 171 | interp->id = _PyRuntime.interpreters.next_id; |
| 172 | _PyRuntime.interpreters.next_id += 1; |
| 173 | } |
| 174 | HEAD_UNLOCK(); |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 175 | |
Yury Selivanov | f23746a | 2018-01-22 19:11:18 -0500 | [diff] [blame] | 176 | interp->tstate_next_unique_id = 0; |
| 177 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 178 | return interp; |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | |
| 182 | void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 183 | PyInterpreterState_Clear(PyInterpreterState *interp) |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 184 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 185 | PyThreadState *p; |
| 186 | HEAD_LOCK(); |
| 187 | for (p = interp->tstate_head; p != NULL; p = p->next) |
| 188 | PyThreadState_Clear(p); |
| 189 | HEAD_UNLOCK(); |
Victor Stinner | da27341 | 2017-12-15 01:46:02 +0100 | [diff] [blame] | 190 | _PyCoreConfig_Clear(&interp->core_config); |
| 191 | _PyMainInterpreterConfig_Clear(&interp->config); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 192 | Py_CLEAR(interp->codec_search_path); |
| 193 | Py_CLEAR(interp->codec_search_cache); |
| 194 | Py_CLEAR(interp->codec_error_registry); |
Eric Snow | 93c92f7 | 2017-09-13 23:46:04 -0700 | [diff] [blame] | 195 | Py_CLEAR(interp->modules); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 196 | Py_CLEAR(interp->modules_by_index); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 197 | Py_CLEAR(interp->sysdict); |
| 198 | Py_CLEAR(interp->builtins); |
Serhiy Storchaka | 87a5c51 | 2014-02-10 18:21:34 +0200 | [diff] [blame] | 199 | Py_CLEAR(interp->builtins_copy); |
Brett Cannon | fd07415 | 2012-04-14 14:10:13 -0400 | [diff] [blame] | 200 | Py_CLEAR(interp->importlib); |
Serhiy Storchaka | 133138a | 2016-08-02 22:51:21 +0300 | [diff] [blame] | 201 | Py_CLEAR(interp->import_func); |
Antoine Pitrou | 346cbd3 | 2017-05-27 17:50:54 +0200 | [diff] [blame] | 202 | #ifdef HAVE_FORK |
| 203 | Py_CLEAR(interp->before_forkers); |
| 204 | Py_CLEAR(interp->after_forkers_parent); |
| 205 | Py_CLEAR(interp->after_forkers_child); |
| 206 | #endif |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 207 | } |
| 208 | |
| 209 | |
| 210 | static void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 211 | zapthreads(PyInterpreterState *interp) |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 212 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 213 | PyThreadState *p; |
| 214 | /* No need to lock the mutex here because this should only happen |
| 215 | when the threads are all really dead (XXX famous last words). */ |
| 216 | while ((p = interp->tstate_head) != NULL) { |
| 217 | PyThreadState_Delete(p); |
| 218 | } |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 219 | } |
| 220 | |
| 221 | |
| 222 | void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 223 | PyInterpreterState_Delete(PyInterpreterState *interp) |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 224 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 225 | PyInterpreterState **p; |
| 226 | zapthreads(interp); |
| 227 | HEAD_LOCK(); |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 228 | for (p = &_PyRuntime.interpreters.head; ; p = &(*p)->next) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 229 | if (*p == NULL) |
| 230 | Py_FatalError( |
| 231 | "PyInterpreterState_Delete: invalid interp"); |
| 232 | if (*p == interp) |
| 233 | break; |
| 234 | } |
| 235 | if (interp->tstate_head != NULL) |
| 236 | Py_FatalError("PyInterpreterState_Delete: remaining threads"); |
| 237 | *p = interp->next; |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 238 | if (_PyRuntime.interpreters.main == interp) { |
| 239 | _PyRuntime.interpreters.main = NULL; |
| 240 | if (_PyRuntime.interpreters.head != NULL) |
Eric Snow | 6b4be19 | 2017-05-22 21:36:03 -0700 | [diff] [blame] | 241 | Py_FatalError("PyInterpreterState_Delete: remaining subinterpreters"); |
| 242 | } |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 243 | HEAD_UNLOCK(); |
Victor Stinner | 1a7425f | 2013-07-07 16:25:15 +0200 | [diff] [blame] | 244 | PyMem_RawFree(interp); |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | |
Eric Snow | e377416 | 2017-05-22 19:46:40 -0700 | [diff] [blame] | 248 | int64_t |
| 249 | PyInterpreterState_GetID(PyInterpreterState *interp) |
| 250 | { |
| 251 | if (interp == NULL) { |
| 252 | PyErr_SetString(PyExc_RuntimeError, "no interpreter provided"); |
| 253 | return -1; |
| 254 | } |
| 255 | return interp->id; |
| 256 | } |
| 257 | |
| 258 | |
Michael W. Hudson | 019a78e | 2002-11-08 12:53:11 +0000 | [diff] [blame] | 259 | /* Default implementation for _PyThreadState_GetFrame */ |
| 260 | static struct _frame * |
| 261 | threadstate_getframe(PyThreadState *self) |
| 262 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 263 | return self->frame; |
Michael W. Hudson | 019a78e | 2002-11-08 12:53:11 +0000 | [diff] [blame] | 264 | } |
| 265 | |
Victor Stinner | 45b9be5 | 2010-03-03 23:28:07 +0000 | [diff] [blame] | 266 | static PyThreadState * |
| 267 | new_threadstate(PyInterpreterState *interp, int init) |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 268 | { |
Victor Stinner | 1a7425f | 2013-07-07 16:25:15 +0200 | [diff] [blame] | 269 | PyThreadState *tstate = (PyThreadState *)PyMem_RawMalloc(sizeof(PyThreadState)); |
Tim Peters | 8470558 | 2004-10-10 02:47:33 +0000 | [diff] [blame] | 270 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 271 | if (_PyThreadState_GetFrame == NULL) |
| 272 | _PyThreadState_GetFrame = threadstate_getframe; |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 273 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 274 | if (tstate != NULL) { |
| 275 | tstate->interp = interp; |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 276 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 277 | tstate->frame = NULL; |
| 278 | tstate->recursion_depth = 0; |
| 279 | tstate->overflowed = 0; |
| 280 | tstate->recursion_critical = 0; |
pdox | 1896793 | 2017-10-25 23:03:01 -0700 | [diff] [blame] | 281 | tstate->stackcheck_counter = 0; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 282 | tstate->tracing = 0; |
| 283 | tstate->use_tracing = 0; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 284 | tstate->gilstate_counter = 0; |
| 285 | tstate->async_exc = NULL; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 286 | tstate->thread_id = PyThread_get_thread_ident(); |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 287 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 288 | tstate->dict = NULL; |
Guido van Rossum | ede0439 | 1998-04-10 20:18:25 +0000 | [diff] [blame] | 289 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 290 | tstate->curexc_type = NULL; |
| 291 | tstate->curexc_value = NULL; |
| 292 | tstate->curexc_traceback = NULL; |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 293 | |
Mark Shannon | ae3087c | 2017-10-22 22:41:51 +0100 | [diff] [blame] | 294 | tstate->exc_state.exc_type = NULL; |
| 295 | tstate->exc_state.exc_value = NULL; |
| 296 | tstate->exc_state.exc_traceback = NULL; |
| 297 | tstate->exc_state.previous_item = NULL; |
| 298 | tstate->exc_info = &tstate->exc_state; |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 299 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 300 | tstate->c_profilefunc = NULL; |
| 301 | tstate->c_tracefunc = NULL; |
| 302 | tstate->c_profileobj = NULL; |
| 303 | tstate->c_traceobj = NULL; |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 304 | |
Antoine Pitrou | 2b0218a | 2012-09-06 00:59:49 +0200 | [diff] [blame] | 305 | tstate->trash_delete_nesting = 0; |
| 306 | tstate->trash_delete_later = NULL; |
Antoine Pitrou | 7b47699 | 2013-09-07 23:38:37 +0200 | [diff] [blame] | 307 | tstate->on_delete = NULL; |
| 308 | tstate->on_delete_data = NULL; |
Antoine Pitrou | 2b0218a | 2012-09-06 00:59:49 +0200 | [diff] [blame] | 309 | |
Nathaniel J. Smith | fc2f407 | 2018-01-21 06:44:07 -0800 | [diff] [blame] | 310 | tstate->coroutine_origin_tracking_depth = 0; |
| 311 | |
Yury Selivanov | 7544508 | 2015-05-11 22:57:16 -0400 | [diff] [blame] | 312 | tstate->coroutine_wrapper = NULL; |
Yury Selivanov | aab3c4a | 2015-06-02 18:43:51 -0400 | [diff] [blame] | 313 | tstate->in_coroutine_wrapper = 0; |
Yury Selivanov | 7544508 | 2015-05-11 22:57:16 -0400 | [diff] [blame] | 314 | |
Yury Selivanov | eb63645 | 2016-09-08 22:01:51 -0700 | [diff] [blame] | 315 | tstate->async_gen_firstiter = NULL; |
| 316 | tstate->async_gen_finalizer = NULL; |
| 317 | |
Yury Selivanov | f23746a | 2018-01-22 19:11:18 -0500 | [diff] [blame] | 318 | tstate->context = NULL; |
| 319 | tstate->context_ver = 1; |
| 320 | |
| 321 | tstate->id = ++interp->tstate_next_unique_id; |
| 322 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 323 | if (init) |
| 324 | _PyThreadState_Init(tstate); |
Michael W. Hudson | 188d436 | 2005-06-20 16:52:57 +0000 | [diff] [blame] | 325 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 326 | HEAD_LOCK(); |
Charles-Francois Natali | f28dfdd | 2013-05-08 21:09:52 +0200 | [diff] [blame] | 327 | tstate->prev = NULL; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 328 | tstate->next = interp->tstate_head; |
Charles-Francois Natali | f28dfdd | 2013-05-08 21:09:52 +0200 | [diff] [blame] | 329 | if (tstate->next) |
| 330 | tstate->next->prev = tstate; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 331 | interp->tstate_head = tstate; |
| 332 | HEAD_UNLOCK(); |
| 333 | } |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 334 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 335 | return tstate; |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 336 | } |
| 337 | |
Victor Stinner | 45b9be5 | 2010-03-03 23:28:07 +0000 | [diff] [blame] | 338 | PyThreadState * |
| 339 | PyThreadState_New(PyInterpreterState *interp) |
| 340 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 341 | return new_threadstate(interp, 1); |
Victor Stinner | 45b9be5 | 2010-03-03 23:28:07 +0000 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | PyThreadState * |
| 345 | _PyThreadState_Prealloc(PyInterpreterState *interp) |
| 346 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 347 | return new_threadstate(interp, 0); |
Victor Stinner | 45b9be5 | 2010-03-03 23:28:07 +0000 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | void |
| 351 | _PyThreadState_Init(PyThreadState *tstate) |
| 352 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 353 | _PyGILState_NoteThreadState(tstate); |
Victor Stinner | 45b9be5 | 2010-03-03 23:28:07 +0000 | [diff] [blame] | 354 | } |
| 355 | |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 356 | PyObject* |
Martin v. Löwis | 7800f75 | 2012-06-22 12:20:55 +0200 | [diff] [blame] | 357 | PyState_FindModule(struct PyModuleDef* module) |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 358 | { |
Martin v. Löwis | 7800f75 | 2012-06-22 12:20:55 +0200 | [diff] [blame] | 359 | Py_ssize_t index = module->m_base.m_index; |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 360 | PyInterpreterState *state = GET_INTERP_STATE(); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 361 | PyObject *res; |
Nick Coghlan | d5cacbb | 2015-05-23 22:24:10 +1000 | [diff] [blame] | 362 | if (module->m_slots) { |
| 363 | return NULL; |
| 364 | } |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 365 | if (index == 0) |
| 366 | return NULL; |
| 367 | if (state->modules_by_index == NULL) |
| 368 | return NULL; |
Antoine Pitrou | 75506e8 | 2012-08-20 19:30:46 +0200 | [diff] [blame] | 369 | if (index >= PyList_GET_SIZE(state->modules_by_index)) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 370 | return NULL; |
| 371 | res = PyList_GET_ITEM(state->modules_by_index, index); |
| 372 | return res==Py_None ? NULL : res; |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | int |
| 376 | _PyState_AddModule(PyObject* module, struct PyModuleDef* def) |
| 377 | { |
Nick Coghlan | d5cacbb | 2015-05-23 22:24:10 +1000 | [diff] [blame] | 378 | PyInterpreterState *state; |
Berker Peksag | 4b7b565 | 2016-08-22 18:05:56 +0300 | [diff] [blame] | 379 | if (!def) { |
| 380 | assert(PyErr_Occurred()); |
| 381 | return -1; |
| 382 | } |
Nick Coghlan | d5cacbb | 2015-05-23 22:24:10 +1000 | [diff] [blame] | 383 | if (def->m_slots) { |
| 384 | PyErr_SetString(PyExc_SystemError, |
| 385 | "PyState_AddModule called on module with slots"); |
| 386 | return -1; |
| 387 | } |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 388 | state = GET_INTERP_STATE(); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 389 | if (!state->modules_by_index) { |
| 390 | state->modules_by_index = PyList_New(0); |
| 391 | if (!state->modules_by_index) |
| 392 | return -1; |
| 393 | } |
| 394 | while(PyList_GET_SIZE(state->modules_by_index) <= def->m_base.m_index) |
| 395 | if (PyList_Append(state->modules_by_index, Py_None) < 0) |
| 396 | return -1; |
| 397 | Py_INCREF(module); |
| 398 | return PyList_SetItem(state->modules_by_index, |
| 399 | def->m_base.m_index, module); |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 400 | } |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 401 | |
Martin v. Löwis | 7800f75 | 2012-06-22 12:20:55 +0200 | [diff] [blame] | 402 | int |
| 403 | PyState_AddModule(PyObject* module, struct PyModuleDef* def) |
| 404 | { |
| 405 | Py_ssize_t index; |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 406 | PyInterpreterState *state = GET_INTERP_STATE(); |
Martin v. Löwis | 7800f75 | 2012-06-22 12:20:55 +0200 | [diff] [blame] | 407 | if (!def) { |
| 408 | Py_FatalError("PyState_AddModule: Module Definition is NULL"); |
| 409 | return -1; |
| 410 | } |
| 411 | index = def->m_base.m_index; |
| 412 | if (state->modules_by_index) { |
| 413 | if(PyList_GET_SIZE(state->modules_by_index) >= index) { |
| 414 | if(module == PyList_GET_ITEM(state->modules_by_index, index)) { |
| 415 | Py_FatalError("PyState_AddModule: Module already added!"); |
| 416 | return -1; |
| 417 | } |
| 418 | } |
| 419 | } |
| 420 | return _PyState_AddModule(module, def); |
| 421 | } |
| 422 | |
| 423 | int |
| 424 | PyState_RemoveModule(struct PyModuleDef* def) |
| 425 | { |
Nick Coghlan | d5cacbb | 2015-05-23 22:24:10 +1000 | [diff] [blame] | 426 | PyInterpreterState *state; |
Martin v. Löwis | 7800f75 | 2012-06-22 12:20:55 +0200 | [diff] [blame] | 427 | Py_ssize_t index = def->m_base.m_index; |
Nick Coghlan | d5cacbb | 2015-05-23 22:24:10 +1000 | [diff] [blame] | 428 | if (def->m_slots) { |
| 429 | PyErr_SetString(PyExc_SystemError, |
| 430 | "PyState_RemoveModule called on module with slots"); |
| 431 | return -1; |
| 432 | } |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 433 | state = GET_INTERP_STATE(); |
Martin v. Löwis | 7800f75 | 2012-06-22 12:20:55 +0200 | [diff] [blame] | 434 | if (index == 0) { |
| 435 | Py_FatalError("PyState_RemoveModule: Module index invalid."); |
| 436 | return -1; |
| 437 | } |
| 438 | if (state->modules_by_index == NULL) { |
| 439 | Py_FatalError("PyState_RemoveModule: Interpreters module-list not acessible."); |
| 440 | return -1; |
| 441 | } |
| 442 | if (index > PyList_GET_SIZE(state->modules_by_index)) { |
| 443 | Py_FatalError("PyState_RemoveModule: Module index out of bounds."); |
| 444 | return -1; |
| 445 | } |
| 446 | return PyList_SetItem(state->modules_by_index, index, Py_None); |
| 447 | } |
| 448 | |
Antoine Pitrou | 40322e6 | 2013-08-11 00:30:09 +0200 | [diff] [blame] | 449 | /* used by import.c:PyImport_Cleanup */ |
| 450 | void |
| 451 | _PyState_ClearModules(void) |
| 452 | { |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 453 | PyInterpreterState *state = GET_INTERP_STATE(); |
Antoine Pitrou | 40322e6 | 2013-08-11 00:30:09 +0200 | [diff] [blame] | 454 | if (state->modules_by_index) { |
| 455 | Py_ssize_t i; |
| 456 | for (i = 0; i < PyList_GET_SIZE(state->modules_by_index); i++) { |
| 457 | PyObject *m = PyList_GET_ITEM(state->modules_by_index, i); |
| 458 | if (PyModule_Check(m)) { |
| 459 | /* cleanup the saved copy of module dicts */ |
| 460 | PyModuleDef *md = PyModule_GetDef(m); |
| 461 | if (md) |
| 462 | Py_CLEAR(md->m_base.m_copy); |
| 463 | } |
| 464 | } |
| 465 | /* Setting modules_by_index to NULL could be dangerous, so we |
| 466 | clear the list instead. */ |
| 467 | if (PyList_SetSlice(state->modules_by_index, |
| 468 | 0, PyList_GET_SIZE(state->modules_by_index), |
| 469 | NULL)) |
| 470 | PyErr_WriteUnraisable(state->modules_by_index); |
| 471 | } |
| 472 | } |
| 473 | |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 474 | void |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 475 | PyThreadState_Clear(PyThreadState *tstate) |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 476 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 477 | if (Py_VerboseFlag && tstate->frame != NULL) |
| 478 | fprintf(stderr, |
| 479 | "PyThreadState_Clear: warning: thread still has a frame\n"); |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 480 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 481 | Py_CLEAR(tstate->frame); |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 482 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 483 | Py_CLEAR(tstate->dict); |
| 484 | Py_CLEAR(tstate->async_exc); |
Guido van Rossum | ede0439 | 1998-04-10 20:18:25 +0000 | [diff] [blame] | 485 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 486 | Py_CLEAR(tstate->curexc_type); |
| 487 | Py_CLEAR(tstate->curexc_value); |
| 488 | Py_CLEAR(tstate->curexc_traceback); |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 489 | |
Mark Shannon | ae3087c | 2017-10-22 22:41:51 +0100 | [diff] [blame] | 490 | Py_CLEAR(tstate->exc_state.exc_type); |
| 491 | Py_CLEAR(tstate->exc_state.exc_value); |
| 492 | Py_CLEAR(tstate->exc_state.exc_traceback); |
Serhiy Storchaka | bdf4298 | 2017-10-26 16:59:40 +0300 | [diff] [blame] | 493 | |
Mark Shannon | ae3087c | 2017-10-22 22:41:51 +0100 | [diff] [blame] | 494 | /* The stack of exception states should contain just this thread. */ |
| 495 | assert(tstate->exc_info->previous_item == NULL); |
| 496 | if (Py_VerboseFlag && tstate->exc_info != &tstate->exc_state) { |
| 497 | fprintf(stderr, |
| 498 | "PyThreadState_Clear: warning: thread still has a generator\n"); |
| 499 | } |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 500 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 501 | tstate->c_profilefunc = NULL; |
| 502 | tstate->c_tracefunc = NULL; |
| 503 | Py_CLEAR(tstate->c_profileobj); |
| 504 | Py_CLEAR(tstate->c_traceobj); |
Yury Selivanov | 7544508 | 2015-05-11 22:57:16 -0400 | [diff] [blame] | 505 | |
| 506 | Py_CLEAR(tstate->coroutine_wrapper); |
Yury Selivanov | eb63645 | 2016-09-08 22:01:51 -0700 | [diff] [blame] | 507 | Py_CLEAR(tstate->async_gen_firstiter); |
| 508 | Py_CLEAR(tstate->async_gen_finalizer); |
Yury Selivanov | f23746a | 2018-01-22 19:11:18 -0500 | [diff] [blame] | 509 | |
| 510 | Py_CLEAR(tstate->context); |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | |
Guido van Rossum | 2975786 | 2001-01-23 01:46:06 +0000 | [diff] [blame] | 514 | /* Common code for PyThreadState_Delete() and PyThreadState_DeleteCurrent() */ |
| 515 | static void |
| 516 | tstate_delete_common(PyThreadState *tstate) |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 517 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 518 | PyInterpreterState *interp; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 519 | if (tstate == NULL) |
| 520 | Py_FatalError("PyThreadState_Delete: NULL tstate"); |
| 521 | interp = tstate->interp; |
| 522 | if (interp == NULL) |
| 523 | Py_FatalError("PyThreadState_Delete: NULL interp"); |
| 524 | HEAD_LOCK(); |
Charles-Francois Natali | f28dfdd | 2013-05-08 21:09:52 +0200 | [diff] [blame] | 525 | if (tstate->prev) |
| 526 | tstate->prev->next = tstate->next; |
| 527 | else |
| 528 | interp->tstate_head = tstate->next; |
| 529 | if (tstate->next) |
| 530 | tstate->next->prev = tstate->prev; |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 531 | HEAD_UNLOCK(); |
Antoine Pitrou | 7b47699 | 2013-09-07 23:38:37 +0200 | [diff] [blame] | 532 | if (tstate->on_delete != NULL) { |
| 533 | tstate->on_delete(tstate->on_delete_data); |
| 534 | } |
Victor Stinner | 1a7425f | 2013-07-07 16:25:15 +0200 | [diff] [blame] | 535 | PyMem_RawFree(tstate); |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 536 | } |
| 537 | |
| 538 | |
Guido van Rossum | 2975786 | 2001-01-23 01:46:06 +0000 | [diff] [blame] | 539 | void |
| 540 | PyThreadState_Delete(PyThreadState *tstate) |
| 541 | { |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 542 | if (tstate == GET_TSTATE()) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 543 | Py_FatalError("PyThreadState_Delete: tstate is still current"); |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 544 | if (_PyRuntime.gilstate.autoInterpreterState && |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 545 | PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey) == tstate) |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 546 | { |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 547 | PyThread_tss_set(&_PyRuntime.gilstate.autoTSSkey, NULL); |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 548 | } |
Christian Heimes | b9dbc7d | 2013-07-01 23:42:28 +0200 | [diff] [blame] | 549 | tstate_delete_common(tstate); |
Guido van Rossum | 2975786 | 2001-01-23 01:46:06 +0000 | [diff] [blame] | 550 | } |
| 551 | |
| 552 | |
Guido van Rossum | 2975786 | 2001-01-23 01:46:06 +0000 | [diff] [blame] | 553 | void |
| 554 | PyThreadState_DeleteCurrent() |
| 555 | { |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 556 | PyThreadState *tstate = GET_TSTATE(); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 557 | if (tstate == NULL) |
| 558 | Py_FatalError( |
| 559 | "PyThreadState_DeleteCurrent: no current tstate"); |
Victor Stinner | 8a1be61 | 2016-03-14 22:07:55 +0100 | [diff] [blame] | 560 | tstate_delete_common(tstate); |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 561 | if (_PyRuntime.gilstate.autoInterpreterState && |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 562 | PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey) == tstate) |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 563 | { |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 564 | PyThread_tss_set(&_PyRuntime.gilstate.autoTSSkey, NULL); |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 565 | } |
Victor Stinner | 8a1be61 | 2016-03-14 22:07:55 +0100 | [diff] [blame] | 566 | SET_TSTATE(NULL); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 567 | PyEval_ReleaseLock(); |
Guido van Rossum | 2975786 | 2001-01-23 01:46:06 +0000 | [diff] [blame] | 568 | } |
Guido van Rossum | 2975786 | 2001-01-23 01:46:06 +0000 | [diff] [blame] | 569 | |
| 570 | |
Antoine Pitrou | 8408cea | 2013-05-05 23:47:09 +0200 | [diff] [blame] | 571 | /* |
| 572 | * Delete all thread states except the one passed as argument. |
| 573 | * Note that, if there is a current thread state, it *must* be the one |
| 574 | * passed as argument. Also, this won't touch any other interpreters |
| 575 | * than the current one, since we don't know which thread state should |
| 576 | * be kept in those other interpreteres. |
| 577 | */ |
| 578 | void |
| 579 | _PyThreadState_DeleteExcept(PyThreadState *tstate) |
| 580 | { |
| 581 | PyInterpreterState *interp = tstate->interp; |
| 582 | PyThreadState *p, *next, *garbage; |
| 583 | HEAD_LOCK(); |
| 584 | /* Remove all thread states, except tstate, from the linked list of |
| 585 | thread states. This will allow calling PyThreadState_Clear() |
Charles-Francois Natali | f28dfdd | 2013-05-08 21:09:52 +0200 | [diff] [blame] | 586 | without holding the lock. */ |
Antoine Pitrou | 8408cea | 2013-05-05 23:47:09 +0200 | [diff] [blame] | 587 | garbage = interp->tstate_head; |
Charles-Francois Natali | f28dfdd | 2013-05-08 21:09:52 +0200 | [diff] [blame] | 588 | if (garbage == tstate) |
| 589 | garbage = tstate->next; |
| 590 | if (tstate->prev) |
| 591 | tstate->prev->next = tstate->next; |
| 592 | if (tstate->next) |
| 593 | tstate->next->prev = tstate->prev; |
| 594 | tstate->prev = tstate->next = NULL; |
Antoine Pitrou | 8408cea | 2013-05-05 23:47:09 +0200 | [diff] [blame] | 595 | interp->tstate_head = tstate; |
Antoine Pitrou | 8408cea | 2013-05-05 23:47:09 +0200 | [diff] [blame] | 596 | HEAD_UNLOCK(); |
| 597 | /* Clear and deallocate all stale thread states. Even if this |
| 598 | executes Python code, we should be safe since it executes |
| 599 | in the current thread, not one of the stale threads. */ |
| 600 | for (p = garbage; p; p = next) { |
| 601 | next = p->next; |
| 602 | PyThreadState_Clear(p); |
Victor Stinner | 1a7425f | 2013-07-07 16:25:15 +0200 | [diff] [blame] | 603 | PyMem_RawFree(p); |
Antoine Pitrou | 8408cea | 2013-05-05 23:47:09 +0200 | [diff] [blame] | 604 | } |
| 605 | } |
| 606 | |
| 607 | |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 608 | PyThreadState * |
Victor Stinner | bfd316e | 2016-01-20 11:12:38 +0100 | [diff] [blame] | 609 | _PyThreadState_UncheckedGet(void) |
| 610 | { |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 611 | return GET_TSTATE(); |
Victor Stinner | bfd316e | 2016-01-20 11:12:38 +0100 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | |
| 615 | PyThreadState * |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 616 | PyThreadState_Get(void) |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 617 | { |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 618 | PyThreadState *tstate = GET_TSTATE(); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 619 | if (tstate == NULL) |
| 620 | Py_FatalError("PyThreadState_Get: no current thread"); |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 621 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 622 | return tstate; |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 623 | } |
| 624 | |
| 625 | |
| 626 | PyThreadState * |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 627 | PyThreadState_Swap(PyThreadState *newts) |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 628 | { |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 629 | PyThreadState *oldts = GET_TSTATE(); |
Guido van Rossum | 25ce566 | 1997-08-02 03:10:38 +0000 | [diff] [blame] | 630 | |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 631 | SET_TSTATE(newts); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 632 | /* It should not be possible for more than one thread state |
| 633 | to be used for a thread. Check this the best we can in debug |
| 634 | builds. |
| 635 | */ |
Antoine Pitrou | a6a4dc8 | 2017-09-07 18:56:24 +0200 | [diff] [blame] | 636 | #if defined(Py_DEBUG) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 637 | if (newts) { |
| 638 | /* This can be called from PyEval_RestoreThread(). Similar |
| 639 | to it, we need to ensure errno doesn't change. |
| 640 | */ |
| 641 | int err = errno; |
| 642 | PyThreadState *check = PyGILState_GetThisThreadState(); |
| 643 | if (check && check->interp == newts->interp && check != newts) |
| 644 | Py_FatalError("Invalid thread state for this thread"); |
| 645 | errno = err; |
| 646 | } |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 647 | #endif |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 648 | return oldts; |
Guido van Rossum | a027efa | 1997-05-05 20:56:21 +0000 | [diff] [blame] | 649 | } |
Guido van Rossum | ede0439 | 1998-04-10 20:18:25 +0000 | [diff] [blame] | 650 | |
| 651 | /* An extension mechanism to store arbitrary additional per-thread state. |
| 652 | PyThreadState_GetDict() returns a dictionary that can be used to hold such |
| 653 | state; the caller should pick a unique key and store its state there. If |
Guido van Rossum | 0fc8f00 | 2003-04-15 15:12:39 +0000 | [diff] [blame] | 654 | PyThreadState_GetDict() returns NULL, an exception has *not* been raised |
| 655 | and the caller should assume no per-thread state is available. */ |
Guido van Rossum | ede0439 | 1998-04-10 20:18:25 +0000 | [diff] [blame] | 656 | |
| 657 | PyObject * |
Thomas Wouters | f70ef4f | 2000-07-22 18:47:25 +0000 | [diff] [blame] | 658 | PyThreadState_GetDict(void) |
Guido van Rossum | ede0439 | 1998-04-10 20:18:25 +0000 | [diff] [blame] | 659 | { |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 660 | PyThreadState *tstate = GET_TSTATE(); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 661 | if (tstate == NULL) |
| 662 | return NULL; |
Guido van Rossum | ede0439 | 1998-04-10 20:18:25 +0000 | [diff] [blame] | 663 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 664 | if (tstate->dict == NULL) { |
| 665 | PyObject *d; |
| 666 | tstate->dict = d = PyDict_New(); |
| 667 | if (d == NULL) |
| 668 | PyErr_Clear(); |
| 669 | } |
| 670 | return tstate->dict; |
Guido van Rossum | ede0439 | 1998-04-10 20:18:25 +0000 | [diff] [blame] | 671 | } |
Guido van Rossum | f5df46d | 2001-07-19 12:19:27 +0000 | [diff] [blame] | 672 | |
| 673 | |
Guido van Rossum | b8b6d0c | 2003-06-28 21:53:52 +0000 | [diff] [blame] | 674 | /* Asynchronously raise an exception in a thread. |
| 675 | Requested by Just van Rossum and Alex Martelli. |
Guido van Rossum | 0f1f63c | 2005-02-08 02:07:57 +0000 | [diff] [blame] | 676 | To prevent naive misuse, you must write your own extension |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 677 | to call this, or use ctypes. Must be called with the GIL held. |
| 678 | Returns the number of tstates modified (normally 1, but 0 if `id` didn't |
| 679 | match any known thread id). Can be called with exc=NULL to clear an |
| 680 | existing async exception. This raises no exceptions. */ |
Guido van Rossum | b8b6d0c | 2003-06-28 21:53:52 +0000 | [diff] [blame] | 681 | |
| 682 | int |
Serhiy Storchaka | aefa7eb | 2017-03-23 15:48:39 +0200 | [diff] [blame] | 683 | PyThreadState_SetAsyncExc(unsigned long id, PyObject *exc) |
| 684 | { |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 685 | PyInterpreterState *interp = GET_INTERP_STATE(); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 686 | PyThreadState *p; |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 687 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 688 | /* Although the GIL is held, a few C API functions can be called |
| 689 | * without the GIL held, and in particular some that create and |
| 690 | * destroy thread and interpreter states. Those can mutate the |
| 691 | * list of thread states we're traversing, so to prevent that we lock |
| 692 | * head_mutex for the duration. |
| 693 | */ |
| 694 | HEAD_LOCK(); |
| 695 | for (p = interp->tstate_head; p != NULL; p = p->next) { |
| 696 | if (p->thread_id == id) { |
| 697 | /* Tricky: we need to decref the current value |
| 698 | * (if any) in p->async_exc, but that can in turn |
| 699 | * allow arbitrary Python code to run, including |
| 700 | * perhaps calls to this function. To prevent |
| 701 | * deadlock, we need to release head_mutex before |
| 702 | * the decref. |
| 703 | */ |
| 704 | PyObject *old_exc = p->async_exc; |
| 705 | Py_XINCREF(exc); |
| 706 | p->async_exc = exc; |
| 707 | HEAD_UNLOCK(); |
| 708 | Py_XDECREF(old_exc); |
| 709 | _PyEval_SignalAsyncExc(); |
| 710 | return 1; |
| 711 | } |
| 712 | } |
| 713 | HEAD_UNLOCK(); |
| 714 | return 0; |
Guido van Rossum | b8b6d0c | 2003-06-28 21:53:52 +0000 | [diff] [blame] | 715 | } |
| 716 | |
| 717 | |
Guido van Rossum | f5df46d | 2001-07-19 12:19:27 +0000 | [diff] [blame] | 718 | /* Routines for advanced debuggers, requested by David Beazley. |
| 719 | Don't use unless you know what you are doing! */ |
| 720 | |
| 721 | PyInterpreterState * |
| 722 | PyInterpreterState_Head(void) |
| 723 | { |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 724 | return _PyRuntime.interpreters.head; |
Guido van Rossum | f5df46d | 2001-07-19 12:19:27 +0000 | [diff] [blame] | 725 | } |
| 726 | |
| 727 | PyInterpreterState * |
Eric Snow | 6b4be19 | 2017-05-22 21:36:03 -0700 | [diff] [blame] | 728 | PyInterpreterState_Main(void) |
| 729 | { |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 730 | return _PyRuntime.interpreters.main; |
Eric Snow | 6b4be19 | 2017-05-22 21:36:03 -0700 | [diff] [blame] | 731 | } |
| 732 | |
| 733 | PyInterpreterState * |
Guido van Rossum | f5df46d | 2001-07-19 12:19:27 +0000 | [diff] [blame] | 734 | PyInterpreterState_Next(PyInterpreterState *interp) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 735 | return interp->next; |
Guido van Rossum | f5df46d | 2001-07-19 12:19:27 +0000 | [diff] [blame] | 736 | } |
| 737 | |
| 738 | PyThreadState * |
| 739 | PyInterpreterState_ThreadHead(PyInterpreterState *interp) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 740 | return interp->tstate_head; |
Guido van Rossum | f5df46d | 2001-07-19 12:19:27 +0000 | [diff] [blame] | 741 | } |
| 742 | |
| 743 | PyThreadState * |
| 744 | PyThreadState_Next(PyThreadState *tstate) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 745 | return tstate->next; |
Guido van Rossum | f5df46d | 2001-07-19 12:19:27 +0000 | [diff] [blame] | 746 | } |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 747 | |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 748 | /* The implementation of sys._current_frames(). This is intended to be |
| 749 | called with the GIL held, as it will be when called via |
| 750 | sys._current_frames(). It's possible it would work fine even without |
| 751 | the GIL held, but haven't thought enough about that. |
| 752 | */ |
| 753 | PyObject * |
| 754 | _PyThread_CurrentFrames(void) |
| 755 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 756 | PyObject *result; |
| 757 | PyInterpreterState *i; |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 758 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 759 | result = PyDict_New(); |
| 760 | if (result == NULL) |
| 761 | return NULL; |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 762 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 763 | /* for i in all interpreters: |
| 764 | * for t in all of i's thread states: |
| 765 | * if t's frame isn't NULL, map t's id to its frame |
Ezio Melotti | 1392500 | 2011-03-16 11:05:33 +0200 | [diff] [blame] | 766 | * Because these lists can mutate even when the GIL is held, we |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 767 | * need to grab head_mutex for the duration. |
| 768 | */ |
| 769 | HEAD_LOCK(); |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 770 | for (i = _PyRuntime.interpreters.head; i != NULL; i = i->next) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 771 | PyThreadState *t; |
| 772 | for (t = i->tstate_head; t != NULL; t = t->next) { |
| 773 | PyObject *id; |
| 774 | int stat; |
| 775 | struct _frame *frame = t->frame; |
| 776 | if (frame == NULL) |
| 777 | continue; |
Serhiy Storchaka | aefa7eb | 2017-03-23 15:48:39 +0200 | [diff] [blame] | 778 | id = PyLong_FromUnsignedLong(t->thread_id); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 779 | if (id == NULL) |
| 780 | goto Fail; |
| 781 | stat = PyDict_SetItem(result, id, (PyObject *)frame); |
| 782 | Py_DECREF(id); |
| 783 | if (stat < 0) |
| 784 | goto Fail; |
| 785 | } |
| 786 | } |
| 787 | HEAD_UNLOCK(); |
| 788 | return result; |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 789 | |
| 790 | Fail: |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 791 | HEAD_UNLOCK(); |
| 792 | Py_DECREF(result); |
| 793 | return NULL; |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 794 | } |
Guido van Rossum | b8b6d0c | 2003-06-28 21:53:52 +0000 | [diff] [blame] | 795 | |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 796 | /* Python "auto thread state" API. */ |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 797 | |
| 798 | /* Keep this as a static, as it is not reliable! It can only |
| 799 | ever be compared to the state for the *current* thread. |
| 800 | * If not equal, then it doesn't matter that the actual |
| 801 | value may change immediately after comparison, as it can't |
| 802 | possibly change to the current thread's state. |
| 803 | * If equal, then the current thread holds the lock, so the value can't |
| 804 | change until we yield the lock. |
| 805 | */ |
| 806 | static int |
| 807 | PyThreadState_IsCurrent(PyThreadState *tstate) |
| 808 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 809 | /* Must be the tstate for this thread */ |
| 810 | assert(PyGILState_GetThisThreadState()==tstate); |
Victor Stinner | b02ef71 | 2016-01-22 14:09:55 +0100 | [diff] [blame] | 811 | return tstate == GET_TSTATE(); |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 812 | } |
| 813 | |
Tim Peters | 4c1f5ec | 2004-10-09 17:25:05 +0000 | [diff] [blame] | 814 | /* Internal initialization/finalization functions called by |
Martin Panter | b4ce1fc | 2015-11-30 03:18:29 +0000 | [diff] [blame] | 815 | Py_Initialize/Py_FinalizeEx |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 816 | */ |
Tim Peters | 19717fa | 2004-10-09 17:38:29 +0000 | [diff] [blame] | 817 | void |
| 818 | _PyGILState_Init(PyInterpreterState *i, PyThreadState *t) |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 819 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 820 | assert(i && t); /* must init with valid states */ |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 821 | if (PyThread_tss_create(&_PyRuntime.gilstate.autoTSSkey) != 0) { |
| 822 | Py_FatalError("Could not allocate TSS entry"); |
| 823 | } |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 824 | _PyRuntime.gilstate.autoInterpreterState = i; |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 825 | assert(PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey) == NULL); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 826 | assert(t->gilstate_counter == 0); |
Michael W. Hudson | 188d436 | 2005-06-20 16:52:57 +0000 | [diff] [blame] | 827 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 828 | _PyGILState_NoteThreadState(t); |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 829 | } |
| 830 | |
Victor Stinner | 861d9ab | 2016-03-16 22:45:24 +0100 | [diff] [blame] | 831 | PyInterpreterState * |
| 832 | _PyGILState_GetInterpreterStateUnsafe(void) |
| 833 | { |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 834 | return _PyRuntime.gilstate.autoInterpreterState; |
Victor Stinner | 861d9ab | 2016-03-16 22:45:24 +0100 | [diff] [blame] | 835 | } |
| 836 | |
Tim Peters | 19717fa | 2004-10-09 17:38:29 +0000 | [diff] [blame] | 837 | void |
| 838 | _PyGILState_Fini(void) |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 839 | { |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 840 | PyThread_tss_delete(&_PyRuntime.gilstate.autoTSSkey); |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 841 | _PyRuntime.gilstate.autoInterpreterState = NULL; |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 842 | } |
| 843 | |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 844 | /* Reset the TSS key - called by PyOS_AfterFork_Child(). |
Antoine Pitrou | 0c759fe | 2011-04-27 19:28:05 +0200 | [diff] [blame] | 845 | * This should not be necessary, but some - buggy - pthread implementations |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 846 | * don't reset TSS upon fork(), see issue #10517. |
Antoine Pitrou | 0c759fe | 2011-04-27 19:28:05 +0200 | [diff] [blame] | 847 | */ |
| 848 | void |
| 849 | _PyGILState_Reinit(void) |
| 850 | { |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 851 | _PyRuntime.interpreters.mutex = PyThread_allocate_lock(); |
| 852 | if (_PyRuntime.interpreters.mutex == NULL) |
| 853 | Py_FatalError("Can't initialize threads for interpreter"); |
Antoine Pitrou | 0c759fe | 2011-04-27 19:28:05 +0200 | [diff] [blame] | 854 | PyThreadState *tstate = PyGILState_GetThisThreadState(); |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 855 | PyThread_tss_delete(&_PyRuntime.gilstate.autoTSSkey); |
| 856 | if (PyThread_tss_create(&_PyRuntime.gilstate.autoTSSkey) != 0) { |
| 857 | Py_FatalError("Could not allocate TSS entry"); |
| 858 | } |
Antoine Pitrou | 0c759fe | 2011-04-27 19:28:05 +0200 | [diff] [blame] | 859 | |
Charles-François Natali | a233df8 | 2011-11-22 19:49:51 +0100 | [diff] [blame] | 860 | /* If the thread had an associated auto thread state, reassociate it with |
| 861 | * the new key. */ |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 862 | if (tstate && |
| 863 | PyThread_tss_set(&_PyRuntime.gilstate.autoTSSkey, (void *)tstate) != 0) |
| 864 | { |
| 865 | Py_FatalError("Couldn't create autoTSSkey mapping"); |
| 866 | } |
Antoine Pitrou | 0c759fe | 2011-04-27 19:28:05 +0200 | [diff] [blame] | 867 | } |
| 868 | |
Michael W. Hudson | 188d436 | 2005-06-20 16:52:57 +0000 | [diff] [blame] | 869 | /* When a thread state is created for a thread by some mechanism other than |
| 870 | PyGILState_Ensure, it's important that the GILState machinery knows about |
| 871 | it so it doesn't try to create another thread state for the thread (this is |
| 872 | a better fix for SF bug #1010677 than the first one attempted). |
| 873 | */ |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 874 | static void |
Michael W. Hudson | 188d436 | 2005-06-20 16:52:57 +0000 | [diff] [blame] | 875 | _PyGILState_NoteThreadState(PyThreadState* tstate) |
| 876 | { |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 877 | /* If autoTSSkey isn't initialized, this must be the very first |
Antoine Pitrou | 079ce54 | 2010-09-08 12:37:10 +0000 | [diff] [blame] | 878 | threadstate created in Py_Initialize(). Don't do anything for now |
| 879 | (we'll be back here when _PyGILState_Init is called). */ |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 880 | if (!_PyRuntime.gilstate.autoInterpreterState) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 881 | return; |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 882 | |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 883 | /* Stick the thread state for this thread in thread specific storage. |
Michael W. Hudson | 188d436 | 2005-06-20 16:52:57 +0000 | [diff] [blame] | 884 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 885 | The only situation where you can legitimately have more than one |
| 886 | thread state for an OS level thread is when there are multiple |
Victor Stinner | 590cebe | 2013-12-13 11:08:56 +0100 | [diff] [blame] | 887 | interpreters. |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 888 | |
Victor Stinner | 590cebe | 2013-12-13 11:08:56 +0100 | [diff] [blame] | 889 | You shouldn't really be using the PyGILState_ APIs anyway (see issues |
| 890 | #10915 and #15751). |
Michael W. Hudson | 188d436 | 2005-06-20 16:52:57 +0000 | [diff] [blame] | 891 | |
Victor Stinner | 590cebe | 2013-12-13 11:08:56 +0100 | [diff] [blame] | 892 | The first thread state created for that given OS level thread will |
| 893 | "win", which seems reasonable behaviour. |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 894 | */ |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 895 | if (PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey) == NULL) { |
| 896 | if ((PyThread_tss_set(&_PyRuntime.gilstate.autoTSSkey, (void *)tstate) |
| 897 | ) != 0) |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 898 | { |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 899 | Py_FatalError("Couldn't create autoTSSkey mapping"); |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 900 | } |
Victor Stinner | 590cebe | 2013-12-13 11:08:56 +0100 | [diff] [blame] | 901 | } |
Michael W. Hudson | 188d436 | 2005-06-20 16:52:57 +0000 | [diff] [blame] | 902 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 903 | /* PyGILState_Release must not try to delete this thread state. */ |
| 904 | tstate->gilstate_counter = 1; |
Michael W. Hudson | 188d436 | 2005-06-20 16:52:57 +0000 | [diff] [blame] | 905 | } |
| 906 | |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 907 | /* The public functions */ |
Tim Peters | 19717fa | 2004-10-09 17:38:29 +0000 | [diff] [blame] | 908 | PyThreadState * |
| 909 | PyGILState_GetThisThreadState(void) |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 910 | { |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 911 | if (_PyRuntime.gilstate.autoInterpreterState == NULL) |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 912 | return NULL; |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 913 | return (PyThreadState *)PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey); |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 914 | } |
| 915 | |
Kristján Valur Jónsson | 684cd0e | 2013-03-23 03:36:16 -0700 | [diff] [blame] | 916 | int |
| 917 | PyGILState_Check(void) |
| 918 | { |
Victor Stinner | 8a1be61 | 2016-03-14 22:07:55 +0100 | [diff] [blame] | 919 | PyThreadState *tstate; |
| 920 | |
| 921 | if (!_PyGILState_check_enabled) |
| 922 | return 1; |
| 923 | |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 924 | if (!PyThread_tss_is_created(&_PyRuntime.gilstate.autoTSSkey)) { |
Victor Stinner | 8a1be61 | 2016-03-14 22:07:55 +0100 | [diff] [blame] | 925 | return 1; |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 926 | } |
Victor Stinner | 8a1be61 | 2016-03-14 22:07:55 +0100 | [diff] [blame] | 927 | |
| 928 | tstate = GET_TSTATE(); |
| 929 | if (tstate == NULL) |
| 930 | return 0; |
| 931 | |
| 932 | return (tstate == PyGILState_GetThisThreadState()); |
Kristján Valur Jónsson | 684cd0e | 2013-03-23 03:36:16 -0700 | [diff] [blame] | 933 | } |
| 934 | |
Tim Peters | 19717fa | 2004-10-09 17:38:29 +0000 | [diff] [blame] | 935 | PyGILState_STATE |
| 936 | PyGILState_Ensure(void) |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 937 | { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 938 | int current; |
| 939 | PyThreadState *tcur; |
Victor Stinner | b4d1e1f | 2017-11-30 22:05:00 +0100 | [diff] [blame] | 940 | int need_init_threads = 0; |
| 941 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 942 | /* Note that we do not auto-init Python here - apart from |
| 943 | potential races with 2 threads auto-initializing, pep-311 |
| 944 | spells out other issues. Embedders are expected to have |
| 945 | called Py_Initialize() and usually PyEval_InitThreads(). |
| 946 | */ |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 947 | /* Py_Initialize() hasn't been called! */ |
| 948 | assert(_PyRuntime.gilstate.autoInterpreterState); |
Victor Stinner | b4d1e1f | 2017-11-30 22:05:00 +0100 | [diff] [blame] | 949 | |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 950 | tcur = (PyThreadState *)PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 951 | if (tcur == NULL) { |
Victor Stinner | b4d1e1f | 2017-11-30 22:05:00 +0100 | [diff] [blame] | 952 | need_init_threads = 1; |
Victor Stinner | 62ca100 | 2013-12-13 01:46:43 +0100 | [diff] [blame] | 953 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 954 | /* Create a new thread state for this thread */ |
Eric Snow | 2ebc5ce | 2017-09-07 23:51:28 -0600 | [diff] [blame] | 955 | tcur = PyThreadState_New(_PyRuntime.gilstate.autoInterpreterState); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 956 | if (tcur == NULL) |
| 957 | Py_FatalError("Couldn't create thread-state for new thread"); |
| 958 | /* This is our thread state! We'll need to delete it in the |
| 959 | matching call to PyGILState_Release(). */ |
| 960 | tcur->gilstate_counter = 0; |
| 961 | current = 0; /* new thread state is never current */ |
| 962 | } |
Victor Stinner | b4d1e1f | 2017-11-30 22:05:00 +0100 | [diff] [blame] | 963 | else { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 964 | current = PyThreadState_IsCurrent(tcur); |
Victor Stinner | b4d1e1f | 2017-11-30 22:05:00 +0100 | [diff] [blame] | 965 | } |
| 966 | |
| 967 | if (current == 0) { |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 968 | PyEval_RestoreThread(tcur); |
Victor Stinner | b4d1e1f | 2017-11-30 22:05:00 +0100 | [diff] [blame] | 969 | } |
| 970 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 971 | /* Update our counter in the thread-state - no need for locks: |
| 972 | - tcur will remain valid as we hold the GIL. |
| 973 | - the counter is safe as we are the only thread "allowed" |
| 974 | to modify this value |
| 975 | */ |
| 976 | ++tcur->gilstate_counter; |
Victor Stinner | b4d1e1f | 2017-11-30 22:05:00 +0100 | [diff] [blame] | 977 | |
| 978 | if (need_init_threads) { |
| 979 | /* At startup, Python has no concrete GIL. If PyGILState_Ensure() is |
| 980 | called from a new thread for the first time, we need the create the |
| 981 | GIL. */ |
| 982 | PyEval_InitThreads(); |
| 983 | } |
| 984 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 985 | return current ? PyGILState_LOCKED : PyGILState_UNLOCKED; |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 986 | } |
| 987 | |
Tim Peters | 19717fa | 2004-10-09 17:38:29 +0000 | [diff] [blame] | 988 | void |
| 989 | PyGILState_Release(PyGILState_STATE oldstate) |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 990 | { |
Masayuki Yamamoto | 731e189 | 2017-10-06 19:41:34 +0900 | [diff] [blame] | 991 | PyThreadState *tcur = (PyThreadState *)PyThread_tss_get( |
| 992 | &_PyRuntime.gilstate.autoTSSkey); |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 993 | if (tcur == NULL) |
| 994 | Py_FatalError("auto-releasing thread-state, " |
| 995 | "but no thread-state for this thread"); |
| 996 | /* We must hold the GIL and have our thread state current */ |
| 997 | /* XXX - remove the check - the assert should be fine, |
| 998 | but while this is very new (April 2003), the extra check |
| 999 | by release-only users can't hurt. |
| 1000 | */ |
| 1001 | if (! PyThreadState_IsCurrent(tcur)) |
| 1002 | Py_FatalError("This thread state must be current when releasing"); |
| 1003 | assert(PyThreadState_IsCurrent(tcur)); |
| 1004 | --tcur->gilstate_counter; |
| 1005 | assert(tcur->gilstate_counter >= 0); /* illegal counter value */ |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 1006 | |
Antoine Pitrou | f95a1b3 | 2010-05-09 15:52:27 +0000 | [diff] [blame] | 1007 | /* If we're going to destroy this thread-state, we must |
| 1008 | * clear it while the GIL is held, as destructors may run. |
| 1009 | */ |
| 1010 | if (tcur->gilstate_counter == 0) { |
| 1011 | /* can't have been locked when we created it */ |
| 1012 | assert(oldstate == PyGILState_UNLOCKED); |
| 1013 | PyThreadState_Clear(tcur); |
| 1014 | /* Delete the thread-state. Note this releases the GIL too! |
| 1015 | * It's vital that the GIL be held here, to avoid shutdown |
| 1016 | * races; see bugs 225673 and 1061968 (that nasty bug has a |
| 1017 | * habit of coming back). |
| 1018 | */ |
| 1019 | PyThreadState_DeleteCurrent(); |
| 1020 | } |
| 1021 | /* Release the lock if necessary */ |
| 1022 | else if (oldstate == PyGILState_UNLOCKED) |
| 1023 | PyEval_SaveThread(); |
Mark Hammond | 8d98d2c | 2003-04-19 15:41:53 +0000 | [diff] [blame] | 1024 | } |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1025 | |
Benjamin Peterson | 3bf0175 | 2012-04-13 18:06:36 -0400 | [diff] [blame] | 1026 | |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1027 | #ifdef __cplusplus |
| 1028 | } |
| 1029 | #endif |