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GeezerVison is showing github.com — cpython/Modules/_interpretersmodule.c at 3.14 · python/cpython Expand file tree/ Copy path_interpretersmodule.cMore file actions 1750 lines (1531 loc) · 48.6 KB / Copy path_interpretersmodule.cFile metadata and controls1750 lines (1531 loc) · 48.6 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 /* interpreters module */ /* low-level access to interpreter primitives */ #ifndef Py_BUILD_CORE_BUILTIN # define Py_BUILD_CORE_MODULE 1 #endif #include "Python.h" #include "pycore_code.h" // _PyCode_HAS_EXECUTORS() #include "pycore_crossinterp.h" // _PyXIData_t #include "pycore_pyerrors.h" // _PyErr_GetRaisedException() #include "pycore_interp.h" // _PyInterpreterState_IDIncref() #include "pycore_modsupport.h" // _PyArg_BadArgument() #include "pycore_namespace.h" // _PyNamespace_New() #include "pycore_pybuffer.h" // _PyBuffer_ReleaseInInterpreterAndRawFree() #include "pycore_pylifecycle.h" // _PyInterpreterConfig_AsDict() #include "pycore_pystate.h" // _PyInterpreterState_IsRunningMain() #include "marshal.h" // PyMarshal_ReadObjectFromString() #include "_interpreters_common.h" #define MODULE_NAME _interpreters #define MODULE_NAME_STR Py_STRINGIFY(MODULE_NAME) #define MODINIT_FUNC_NAME RESOLVE_MODINIT_FUNC_NAME(MODULE_NAME) static PyInterpreterState * _get_current_interp(void) { // PyInterpreterState_Get() aborts if lookup fails, so don't need // to check the result for NULL. return PyInterpreterState_Get(); } #define look_up_interp _PyInterpreterState_LookUpIDObject static PyObject * _get_current_module(void) { PyObject *name = PyUnicode_FromString(MODULE_NAME_STR); if (name == NULL) { return NULL; } PyObject *mod = PyImport_GetModule(name); Py_DECREF(name); if (mod == NULL) { return NULL; } assert(mod != Py_None); return mod; } static int is_running_main(PyInterpreterState *interp) { if (_PyInterpreterState_IsRunningMain(interp)) { return 1; } // Unlike with the general C-API, we can be confident that someone // using this module for the main interpreter is doing so through // the main program. Thus we can make this extra check. This benefits // applications that embed Python but haven't been updated yet // to call _PyInterpreterState_SetRunningMain(). if (_Py_IsMainInterpreter(interp)) { return 1; } return 0; } static inline int is_notshareable_raised(PyThreadState *tstate) { PyObject *exctype = _PyXIData_GetNotShareableErrorType(tstate); return _PyErr_ExceptionMatches(tstate, exctype); } static void unwrap_not_shareable(PyThreadState *tstate, _PyXI_failure *failure) { if (_PyXI_UnwrapNotShareableError(tstate, failure) < 0) { _PyErr_Clear(tstate); } } /* Cross-interpreter Buffer Views *******************************************/ /* When a memoryview object is "shared" between interpreters, * its underlying "buffer" memory is actually shared, rather than just * copied. This facilitates efficient use of that data where otherwise * interpreters are strictly isolated. However, this also means that * the underlying data is subject to the complexities of thread-safety, * which the user must manage carefully. * * When the memoryview is "shared", it is essentially copied in the same * way as PyMemory_FromObject() does, but in another interpreter. * The Py_buffer value is copied like normal, including the "buf" pointer, * with one key exception. * * When a Py_buffer is released and it holds a reference to an object, * that object gets a chance to call its bf_releasebuffer() (if any) * before the object is decref'ed. The same is true with the memoryview * tp_dealloc, which essentially calls PyBuffer_Release(). * * The problem for a Py_buffer shared between two interpreters is that * the naive approach breaks interpreter isolation. Operations on an * object must only happen while that object's interpreter is active. * If the copied mv->view.obj pointed to the original memoryview then * the PyBuffer_Release() would happen under the wrong interpreter. * * To work around this, we set mv->view.obj on the copied memoryview * to a wrapper object with the only job of releasing the original * buffer in a cross-interpreter-safe way. */ // XXX Note that there is still an issue to sort out, where the original // interpreter is destroyed but code in another interpreter is still // using dependent buffers. Using such buffers segfaults. This will // require a careful fix. In the meantime, users will have to be // diligent about avoiding the problematic situation. typedef struct { PyObject base; Py_buffer *view; int64_t interpid; } xibufferview; static PyObject * xibufferview_from_buffer(PyTypeObject *cls, Py_buffer *view, int64_t interpid) { assert(interpid >= 0); Py_buffer *copied = PyMem_RawMalloc(sizeof(Py_buffer)); if (copied == NULL) { return PyErr_NoMemory(); } /* This steals the view->obj reference */ *copied = *view; xibufferview *self = PyObject_Malloc(sizeof(xibufferview)); if (self == NULL) { PyMem_RawFree(copied); return PyErr_NoMemory(); } PyObject_Init(&self->base, cls); *self = (xibufferview){ .base = self->base, .view = copied, .interpid = interpid, }; return (PyObject *)self; } static void xibufferview_dealloc(PyObject *op) { xibufferview *self = (xibufferview *)op; if (self->view != NULL) { PyInterpreterState *interp = _PyInterpreterState_LookUpID(self->interpid); if (interp == NULL) { /* The interpreter is no longer alive. */ PyErr_Clear(); PyMem_RawFree(self->view); } else { if (_PyBuffer_ReleaseInInterpreterAndRawFree(interp, self->view) < 0) { // XXX Emit a warning? PyErr_Clear(); } } } PyTypeObject *tp = Py_TYPE(self); tp->tp_free(self); /* "Instances of heap-allocated types hold a reference to their type." * See: https://docs.python.org/3.11/howto/isolating-extensions.html#garbage-collection-protocol * See: https://docs.python.org/3.11/c-api/typeobj.html#c.PyTypeObject.tp_traverse */ // XXX Why don't we implement Py_TPFLAGS_HAVE_GC, e.g. Py_tp_traverse, // like we do for _abc._abc_data? Py_DECREF(tp); } static int xibufferview_getbuf(PyObject *op, Py_buffer *view, int flags) { /* Only PyMemoryView_FromObject() should ever call this, via _memoryview_from_xid() below. */ xibufferview *self = (xibufferview *)op; *view = *self->view; /* This is the workaround mentioned earlier. */ view->obj = op; // XXX Should we leave it alone? view->internal = NULL; return 0; } static PyType_Slot XIBufferViewType_slots[] = { {Py_tp_dealloc, xibufferview_dealloc}, {Py_bf_getbuffer, xibufferview_getbuf}, // We don't bother with Py_bf_releasebuffer since we don't need it. {0, NULL}, }; static PyType_Spec XIBufferViewType_spec = { .name = MODULE_NAME_STR ".CrossInterpreterBufferView", .basicsize = sizeof(xibufferview), .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_DISALLOW_INSTANTIATION | Py_TPFLAGS_IMMUTABLETYPE), .slots = XIBufferViewType_slots, }; static PyTypeObject * _get_current_xibufferview_type(void); struct xibuffer { Py_buffer view; int used; }; static PyObject * _memoryview_from_xid(_PyXIData_t *data) { assert(_PyXIData_DATA(data) != NULL); assert(_PyXIData_OBJ(data) == NULL); assert(_PyXIData_INTERPID(data) >= 0); struct xibuffer *view = (struct xibuffer *)_PyXIData_DATA(data); assert(!view->used); PyTypeObject *cls = _get_current_xibufferview_type(); if (cls == NULL) { return NULL; } PyObject *obj = xibufferview_from_buffer( cls, &view->view, _PyXIData_INTERPID(data)); if (obj == NULL) { return NULL; } PyObject *res = PyMemoryView_FromObject(obj); if (res == NULL) { Py_DECREF(obj); return NULL; } view->used = 1; return res; } static void _pybuffer_shared_free(void* data) { struct xibuffer *view = (struct xibuffer *)data; if (!view->used) { PyBuffer_Release(&view->view); } PyMem_RawFree(data); } static int _pybuffer_shared(PyThreadState *tstate, PyObject *obj, _PyXIData_t *data) { struct xibuffer *view = PyMem_RawMalloc(sizeof(struct xibuffer)); if (view == NULL) { PyErr_NoMemory(); return -1; } view->used = 0; /* This will increment the memoryview's export count, which won't get * decremented until the view sent to other interpreters is released. */ if (PyObject_GetBuffer(obj, &view->view, PyBUF_FULL_RO) < 0) { PyMem_RawFree(view); return -1; } /* The view holds a reference to the object, so we don't worry * about also tracking it on the cross-interpreter data. */ _PyXIData_Init(data, tstate->interp, view, NULL, _memoryview_from_xid); data->free = _pybuffer_shared_free; return 0; } static int register_memoryview_xid(PyObject *mod, PyTypeObject **p_state) { // XIBufferView assert(*p_state == NULL); PyTypeObject *cls = (PyTypeObject *)PyType_FromModuleAndSpec( mod, &XIBufferViewType_spec, NULL); if (cls == NULL) { return -1; } if (PyModule_AddType(mod, cls) < 0) { Py_DECREF(cls); return -1; } *p_state = cls; // Register XID for the builtin memoryview type. if (ensure_xid_class(&PyMemoryView_Type, GETDATA(_pybuffer_shared)) < 0) { return -1; } // We don't ever bother un-registering memoryview. return 0; } /* module state *************************************************************/ typedef struct { int _notused; /* heap types */ PyTypeObject *XIBufferViewType; } module_state; static inline module_state * get_module_state(PyObject *mod) { assert(mod != NULL); module_state *state = PyModule_GetState(mod); assert(state != NULL); return state; } static module_state * _get_current_module_state(void) { PyObject *mod = _get_current_module(); if (mod == NULL) { mod = PyImport_ImportModule(MODULE_NAME_STR); if (mod == NULL) { return NULL; } } module_state *state = get_module_state(mod); Py_DECREF(mod); return state; } static int traverse_module_state(module_state *state, visitproc visit, void *arg) { /* heap types */ Py_VISIT(state->XIBufferViewType); return 0; } static int clear_module_state(module_state *state) { /* heap types */ Py_CLEAR(state->XIBufferViewType); return 0; } static PyTypeObject * _get_current_xibufferview_type(void) { module_state *state = _get_current_module_state(); if (state == NULL) { return NULL; } return state->XIBufferViewType; } /* interpreter-specific code ************************************************/ static int init_named_config(PyInterpreterConfig *config, const char *name) { if (name == NULL || strcmp(name, "") == 0 || strcmp(name, "default") == 0) { name = "isolated"; } if (strcmp(name, "isolated") == 0) { *config = (PyInterpreterConfig)_PyInterpreterConfig_INIT; } else if (strcmp(name, "legacy") == 0) { *config = (PyInterpreterConfig)_PyInterpreterConfig_LEGACY_INIT; } else if (strcmp(name, "empty") == 0) { *config = (PyInterpreterConfig){0}; } else { PyErr_Format(PyExc_ValueError, "unsupported config name '%s'", name); return -1; } return 0; } static int config_from_object(PyObject *configobj, PyInterpreterConfig *config) { if (configobj == NULL || configobj == Py_None) { if (init_named_config(config, NULL) < 0) { return -1; } } else if (PyUnicode_Check(configobj)) { const char *utf8name = PyUnicode_AsUTF8(configobj); if (utf8name == NULL) { return -1; } if (init_named_config(config, utf8name) < 0) { return -1; } } else { PyObject *dict = PyObject_GetAttrString(configobj, "__dict__"); if (dict == NULL) { PyErr_Format(PyExc_TypeError, "bad config %R", configobj); return -1; } int res = _PyInterpreterConfig_InitFromDict(config, dict); Py_DECREF(dict); if (res < 0) { return -1; } } return 0; } struct interp_call { _PyXIData_t *func; _PyXIData_t *args; _PyXIData_t *kwargs; struct { _PyXIData_t func; _PyXIData_t args; _PyXIData_t kwargs; } _preallocated; }; static void _interp_call_clear(struct interp_call *call) { if (call->func != NULL) { _PyXIData_Clear(NULL, call->func); } if (call->args != NULL) { _PyXIData_Clear(NULL, call->args); } if (call->kwargs != NULL) { _PyXIData_Clear(NULL, call->kwargs); } *call = (struct interp_call){0}; } static int _interp_call_pack(PyThreadState *tstate, struct interp_call *call, PyObject *func, PyObject *args, PyObject *kwargs) { xidata_fallback_t fallback = _PyXIDATA_FULL_FALLBACK; assert(call->func == NULL); assert(call->args == NULL); assert(call->kwargs == NULL); // Handle the func. if (!PyCallable_Check(func)) { _PyErr_Format(tstate, PyExc_TypeError, "expected a callable, got %R", func); return -1; } if (_PyFunction_GetXIData(tstate, func, &call->_preallocated.func) < 0) { PyObject *exc = _PyErr_GetRaisedException(tstate); if (_PyPickle_GetXIData(tstate, func, &call->_preallocated.func) < 0) { _PyErr_SetRaisedException(tstate, exc); return -1; } Py_DECREF(exc); } call->func = &call->_preallocated.func; // Handle the args. if (args == NULL || args == Py_None) { // Leave it empty. } else { assert(PyTuple_Check(args)); if (PyTuple_GET_SIZE(args) > 0) { if (_PyObject_GetXIData( tstate, args, fallback, &call->_preallocated.args) < 0) { _interp_call_clear(call); return -1; } call->args = &call->_preallocated.args; } } // Handle the kwargs. if (kwargs == NULL || kwargs == Py_None) { // Leave it empty. } else { assert(PyDict_Check(kwargs)); if (PyDict_GET_SIZE(kwargs) > 0) { if (_PyObject_GetXIData( tstate, kwargs, fallback, &call->_preallocated.kwargs) < 0) { _interp_call_clear(call); return -1; } call->kwargs = &call->_preallocated.kwargs; } } return 0; } static void wrap_notshareable(PyThreadState *tstate, const char *label) { if (!is_notshareable_raised(tstate)) { return; } assert(label != NULL && strlen(label) > 0); PyObject *cause = _PyErr_GetRaisedException(tstate); _PyXIData_FormatNotShareableError(tstate, "%s not shareable", label); PyObject *exc = _PyErr_GetRaisedException(tstate); PyException_SetCause(exc, cause); _PyErr_SetRaisedException(tstate, exc); } static int _interp_call_unpack(struct interp_call *call, PyObject **p_func, PyObject **p_args, PyObject **p_kwargs) { PyThreadState *tstate = PyThreadState_Get(); // Unpack the func. PyObject *func = _PyXIData_NewObject(call->func); if (func == NULL) { wrap_notshareable(tstate, "func"); return -1; } // Unpack the args. PyObject *args; if (call->args == NULL) { args = PyTuple_New(0); if (args == NULL) { Py_DECREF(func); return -1; } } else { args = _PyXIData_NewObject(call->args); if (args == NULL) { wrap_notshareable(tstate, "args"); Py_DECREF(func); return -1; } assert(PyTuple_Check(args)); } // Unpack the kwargs. PyObject *kwargs = NULL; if (call->kwargs != NULL) { kwargs = _PyXIData_NewObject(call->kwargs); if (kwargs == NULL) { wrap_notshareable(tstate, "kwargs"); Py_DECREF(func); Py_DECREF(args); return -1; } assert(PyDict_Check(kwargs)); } *p_func = func; *p_args = args; *p_kwargs = kwargs; return 0; } static int _make_call(struct interp_call *call, PyObject **p_result, _PyXI_failure *failure) { assert(call != NULL && call->func != NULL); PyThreadState *tstate = _PyThreadState_GET(); // Get the func and args. PyObject *func = NULL, *args = NULL, *kwargs = NULL; if (_interp_call_unpack(call, &func, &args, &kwargs) < 0) { assert(func == NULL); assert(args == NULL); assert(kwargs == NULL); _PyXI_InitFailure(failure, _PyXI_ERR_OTHER, NULL); unwrap_not_shareable(tstate, failure); return -1; } assert(!_PyErr_Occurred(tstate)); // Make the call. PyObject *resobj = PyObject_Call(func, args, kwargs); Py_DECREF(func); Py_XDECREF(args); Py_XDECREF(kwargs); if (resobj == NULL) { return -1; } *p_result = resobj; return 0; } static int _run_script(_PyXIData_t *script, PyObject *ns, _PyXI_failure *failure) { PyObject *code = _PyXIData_NewObject(script); if (code == NULL) { _PyXI_InitFailure(failure, _PyXI_ERR_NOT_SHAREABLE, NULL); return -1; } PyObject *result = PyEval_EvalCode(code, ns, ns); Py_DECREF(code); if (result == NULL) { _PyXI_InitFailure(failure, _PyXI_ERR_UNCAUGHT_EXCEPTION, NULL); return -1; } assert(result == Py_None); Py_DECREF(result); // We throw away the result. return 0; } struct run_result { PyObject *result; PyObject *excinfo; }; static void _run_result_clear(struct run_result *runres) { Py_CLEAR(runres->result); Py_CLEAR(runres->excinfo); } static int _run_in_interpreter(PyThreadState *tstate, PyInterpreterState *interp, _PyXIData_t *script, struct interp_call *call, PyObject *shareables, struct run_result *runres) { assert(!_PyErr_Occurred(tstate)); int res = -1; _PyXI_failure *failure = _PyXI_NewFailure(); if (failure == NULL) { return -1; } _PyXI_session *session = _PyXI_NewSession(); if (session == NULL) { _PyXI_FreeFailure(failure); return -1; } _PyXI_session_result result = {0}; // Prep and switch interpreters. if (_PyXI_Enter(session, interp, shareables, &result) < 0) { // If an error occurred at this step, it means that interp // was not prepared and switched. _PyXI_FreeSession(session); _PyXI_FreeFailure(failure); assert(result.excinfo == NULL); return -1; } // Run in the interpreter. if (script != NULL) { assert(call == NULL); PyObject *mainns = _PyXI_GetMainNamespace(session, failure); if (mainns == NULL) { goto finally; } res = _run_script(script, mainns, failure); } else { assert(call != NULL); PyObject *resobj; res = _make_call(call, &resobj, failure); if (res == 0) { res = _PyXI_Preserve(session, "resobj", resobj, failure); Py_DECREF(resobj); if (res < 0) { goto finally; } } } finally: // Clean up and switch back. (void)res; int exitres = _PyXI_Exit(session, failure, &result); assert(res == 0 || exitres != 0); _PyXI_FreeSession(session); _PyXI_FreeFailure(failure); res = exitres; if (_PyErr_Occurred(tstate)) { // It's a directly propagated exception. assert(res < 0); } else if (res < 0) { assert(result.excinfo != NULL); runres->excinfo = Py_NewRef(result.excinfo); res = -1; } else { assert(result.excinfo == NULL); runres->result = _PyXI_GetPreserved(&result, "resobj"); if (_PyErr_Occurred(tstate)) { res = -1; } } _PyXI_ClearResult(&result); return res; } /* module level code ********************************************************/ static long get_whence(PyInterpreterState *interp) { return _PyInterpreterState_GetWhence(interp); } static PyInterpreterState * resolve_interp(PyObject *idobj, int restricted, int reqready, const char *op) { PyInterpreterState *interp; if (idobj == NULL) { interp = PyInterpreterState_Get(); } else { interp = look_up_interp(idobj); if (interp == NULL) { return NULL; } } if (reqready && !_PyInterpreterState_IsReady(interp)) { if (idobj == NULL) { PyErr_Format(PyExc_InterpreterError, "cannot %s current interpreter (not ready)", op); } else { PyErr_Format(PyExc_InterpreterError, "cannot %s interpreter %R (not ready)", op, idobj); } return NULL; } if (restricted && get_whence(interp) != _PyInterpreterState_WHENCE_STDLIB) { if (idobj == NULL) { PyErr_Format(PyExc_InterpreterError, "cannot %s unrecognized current interpreter", op); } else { PyErr_Format(PyExc_InterpreterError, "cannot %s unrecognized interpreter %R", op, idobj); } return NULL; } return interp; } static PyObject * get_summary(PyInterpreterState *interp) { PyObject *idobj = _PyInterpreterState_GetIDObject(interp); if (idobj == NULL) { return NULL; } PyObject *whenceobj = PyLong_FromLong( get_whence(interp)); if (whenceobj == NULL) { Py_DECREF(idobj); return NULL; } PyObject *res = PyTuple_Pack(2, idobj, whenceobj); Py_DECREF(idobj); Py_DECREF(whenceobj); return res; } static PyObject * interp_new_config(PyObject *self, PyObject *args, PyObject *kwds) { const char *name = NULL; if (!PyArg_ParseTuple(args, "|s:" MODULE_NAME_STR ".new_config", &name)) { return NULL; } PyObject *overrides = kwds; PyInterpreterConfig config; if (init_named_config(&config, name) < 0) { return NULL; } if (overrides != NULL && PyDict_GET_SIZE(overrides) > 0) { if (_PyInterpreterConfig_UpdateFromDict(&config, overrides) < 0) { return NULL; } } PyObject *dict = _PyInterpreterConfig_AsDict(&config); if (dict == NULL) { return NULL; } PyObject *configobj = _PyNamespace_New(dict); Py_DECREF(dict); return configobj; } PyDoc_STRVAR(new_config_doc, "new_config(name='isolated', /, **overrides) -> type.SimpleNamespace\n\ \n\ Return a representation of a new PyInterpreterConfig.\n\ \n\ The name determines the initial values of the config. Supported named\n\ configs are: default, isolated, legacy, and empty.\n\ \n\ Any keyword arguments are set on the corresponding config fields,\n\ overriding the initial values."); static PyObject * interp_create(PyObject *self, PyObject *args, PyObject *kwds) { static char *kwlist[] = {"config", "reqrefs", NULL}; PyObject *configobj = NULL; int reqrefs = 0; if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O$p:create", kwlist, &configobj, &reqrefs)) { return NULL; } PyInterpreterConfig config; if (config_from_object(configobj, &config) < 0) { return NULL; } long whence = _PyInterpreterState_WHENCE_STDLIB; PyInterpreterState *interp = \ _PyXI_NewInterpreter(&config, &whence, NULL, NULL); if (interp == NULL) { // XXX Move the chained exception to interpreters.create()? PyObject *exc = PyErr_GetRaisedException(); assert(exc != NULL); PyErr_SetString(PyExc_InterpreterError, "interpreter creation failed"); _PyErr_ChainExceptions1(exc); return NULL; } assert(_PyInterpreterState_IsReady(interp)); PyObject *idobj = _PyInterpreterState_GetIDObject(interp); if (idobj == NULL) { _PyXI_EndInterpreter(interp, NULL, NULL); return NULL; } if (reqrefs) { // Decref to 0 will destroy the interpreter. _PyInterpreterState_RequireIDRef(interp, 1); } return idobj; } PyDoc_STRVAR(create_doc, "create([config], *, reqrefs=False) -> ID\n\ \n\ Create a new interpreter and return a unique generated ID.\n\ \n\ The caller is responsible for destroying the interpreter before exiting,\n\ typically by using _interpreters.destroy(). This can be managed \n\ automatically by passing \"reqrefs=True\" and then using _incref() and\n\ _decref() appropriately.\n\ \n\ \"config\" must be a valid interpreter config or the name of a\n\ predefined config (\"isolated\" or \"legacy\"). The default\n\ is \"isolated\"."); static PyObject * interp_destroy(PyObject *self, PyObject *args, PyObject *kwds) { static char *kwlist[] = {"id", "restrict", NULL}; PyObject *id; int restricted = 0; // XXX Use "L" for id? if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|$p:destroy", kwlist, &id, &restricted)) { return NULL; } // Look up the interpreter. int reqready = 0; PyInterpreterState *interp = \ resolve_interp(id, restricted, reqready, "destroy"); if (interp == NULL) { return NULL; } // Ensure we don't try to destroy the current interpreter. PyInterpreterState *current = _get_current_interp(); if (current == NULL) { return NULL; } if (interp == current) { PyErr_SetString(PyExc_InterpreterError, "cannot destroy the current interpreter"); return NULL; } // Ensure the interpreter isn't running. /* XXX We *could* support destroying a running interpreter but aren't going to worry about it for now. */ if (is_running_main(interp)) { PyErr_Format(PyExc_InterpreterError, "interpreter running"); return NULL; } // Destroy the interpreter. _PyXI_EndInterpreter(interp, NULL, NULL); Py_RETURN_NONE; } PyDoc_STRVAR(destroy_doc, "destroy(id, *, restrict=False)\n\ \n\ Destroy the identified interpreter.\n\ \n\ Attempting to destroy the current interpreter raises InterpreterError.\n\ So does an unrecognized ID."); static PyObject * interp_list_all(PyObject *self, PyObject *args, PyObject *kwargs) { static char *kwlist[] = {"require_ready", NULL}; int reqready = 0; if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|$p:" MODULE_NAME_STR ".list_all", kwlist, &reqready)) { return NULL; } PyObject *ids = PyList_New(0); if (ids == NULL) { return NULL; } PyInterpreterState *interp = PyInterpreterState_Head(); while (interp != NULL) { if (!reqready || _PyInterpreterState_IsReady(interp)) { PyObject *item = get_summary(interp); if (item == NULL) { Py_DECREF(ids); return NULL; } // insert at front of list int res = PyList_Insert(ids, 0, item); Py_DECREF(item); if (res < 0) { Py_DECREF(ids); return NULL; } } interp = PyInterpreterState_Next(interp); } return ids; } PyDoc_STRVAR(list_all_doc, "list_all() -> [(ID, whence)]\n\ |
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