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GeezerVison is showing github.com — cpython/Python/ceval.h at main · python/cpython Expand file tree/ Copy pathceval.hMore file actions 629 lines (576 loc) · 18.7 KB / Copy pathceval.hFile metadata and controls629 lines (576 loc) · 18.7 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 #define _PY_INTERPRETER #include "Python.h" #include "pycore_abstract.h" // _PyIndex_Check() #include "pycore_audit.h" // _PySys_Audit() #include "pycore_backoff.h" #include "pycore_call.h" // _PyObject_CallNoArgs() #include "pycore_cell.h" // PyCell_GetRef() #include "pycore_ceval.h" // SPECIAL___ENTER__ #include "pycore_code.h" #include "pycore_dict.h" #include "pycore_emscripten_signal.h" // _Py_CHECK_EMSCRIPTEN_SIGNALS #include "pycore_floatobject.h" // _PyFloat_ExactDealloc() #include "pycore_frame.h" #include "pycore_function.h" #include "pycore_genobject.h" // _PyCoro_GetAwaitableIter() #include "pycore_import.h" // _PyImport_IsDefaultImportFunc() #include "pycore_instruments.h" #include "pycore_interpframe.h" // _PyFrame_SetStackPointer() #include "pycore_interpolation.h" // _PyInterpolation_Build() #include "pycore_intrinsics.h" #include "pycore_jit.h" #include "pycore_lazyimportobject.h" #include "pycore_list.h" // _PyList_GetItemRef() #include "pycore_long.h" // _PyLong_GetZero() #include "pycore_moduleobject.h" // PyModuleObject #include "pycore_object.h" // _PyObject_GC_TRACK() #include "pycore_opcode_metadata.h" // EXTRA_CASES #include "pycore_opcode_utils.h" // MAKE_FUNCTION_* #include "pycore_optimizer.h" // _PyUOpExecutor_Type #include "pycore_pyatomic_ft_wrappers.h" // FT_ATOMIC_* #include "pycore_pyerrors.h" // _PyErr_GetRaisedException() #include "pycore_pystate.h" // _PyInterpreterState_GET() #include "pycore_range.h" // _PyRangeIterObject #include "pycore_setobject.h" // _PySet_Update() #include "pycore_sliceobject.h" // _PyBuildSlice_ConsumeRefs #include "pycore_sysmodule.h" // _PySys_GetOptionalAttrString() #include "pycore_template.h" // _PyTemplate_Build() #include "pycore_traceback.h" // _PyTraceBack_FromFrame #include "pycore_tuple.h" // _PyTuple_ITEMS() #include "pycore_uop_ids.h" // Uops #include "dictobject.h" #include "frameobject.h" // _PyInterpreterFrame_GetLine #include "opcode.h" #include "pydtrace.h" #include "setobject.h" #include "pycore_stackref.h" #include <stdbool.h> // bool #if !defined(Py_BUILD_CORE) # error "ceval.c must be build with Py_BUILD_CORE define for best performance" #endif #if !defined(Py_DEBUG) && !defined(Py_TRACE_REFS) // GH-89279: The MSVC compiler does not inline these static inline functions // in PGO build in _PyEval_EvalFrameDefault(), because this function is over // the limit of PGO, and that limit cannot be configured. // Define them as macros to make sure that they are always inlined by the // preprocessor. #undef Py_IS_TYPE #define Py_IS_TYPE(ob, type) \ (_PyObject_CAST(ob)->ob_type == (type)) #undef Py_XDECREF #define Py_XDECREF(arg) \ do { \ PyObject *xop = _PyObject_CAST(arg); \ if (xop != NULL) { \ Py_DECREF(xop); \ } \ } while (0) #ifndef Py_GIL_DISABLED #undef Py_DECREF #define Py_DECREF(arg) \ do { \ PyObject *op = _PyObject_CAST(arg); \ if (_Py_IsImmortal(op)) { \ _Py_DECREF_IMMORTAL_STAT_INC(); \ break; \ } \ _Py_DECREF_STAT_INC(); \ if (--op->ob_refcnt == 0) { \ _PyReftracerTrack(op, PyRefTracer_DESTROY); \ destructor dealloc = Py_TYPE(op)->tp_dealloc; \ (*dealloc)(op); \ } \ } while (0) #undef _Py_DECREF_SPECIALIZED #define _Py_DECREF_SPECIALIZED(arg, dealloc) \ do { \ PyObject *op = _PyObject_CAST(arg); \ if (_Py_IsImmortal(op)) { \ _Py_DECREF_IMMORTAL_STAT_INC(); \ break; \ } \ _Py_DECREF_STAT_INC(); \ if (--op->ob_refcnt == 0) { \ _PyReftracerTrack(op, PyRefTracer_DESTROY); \ destructor d = (destructor)(dealloc); \ d(op); \ } \ } while (0) #else // Py_GIL_DISABLED #undef Py_DECREF #define Py_DECREF(arg) \ do { \ PyObject *op = _PyObject_CAST(arg); \ uint32_t local = _Py_atomic_load_uint32_relaxed(&op->ob_ref_local); \ if (local == _Py_IMMORTAL_REFCNT_LOCAL) { \ _Py_DECREF_IMMORTAL_STAT_INC(); \ break; \ } \ _Py_DECREF_STAT_INC(); \ if (_Py_IsOwnedByCurrentThread(op)) { \ local--; \ _Py_atomic_store_uint32_relaxed(&op->ob_ref_local, local); \ if (local == 0) { \ _Py_MergeZeroLocalRefcount(op); \ } \ } \ else { \ _Py_DecRefShared(op); \ } \ } while (0) #undef _Py_DECREF_SPECIALIZED #define _Py_DECREF_SPECIALIZED(arg, dealloc) Py_DECREF(arg) #endif #endif static void check_invalid_reentrancy(void) { #if defined(Py_DEBUG) && defined(Py_GIL_DISABLED) // In the free-threaded build, the interpreter must not be re-entered if // the world-is-stopped. If so, that's a bug somewhere (quite likely in // the painfully complex typeobject code). PyInterpreterState *interp = _PyInterpreterState_GET(); assert(!interp->stoptheworld.world_stopped); #endif } #ifdef Py_DEBUG static void dump_item(_PyStackRef item) { if (PyStackRef_IsNull(item)) { printf("<NULL>"); return; } if (PyStackRef_IsMalformed(item)) { printf("<INVALID>"); return; } if (PyStackRef_IsTaggedInt(item)) { printf("%" PRId64, (int64_t)PyStackRef_UntagInt(item)); return; } PyObject *obj = PyStackRef_AsPyObjectBorrow(item); if (obj == NULL) { printf("<nil>"); return; } // Don't call __repr__(), it might recurse into the interpreter. printf("<%s at %p>", Py_TYPE(obj)->tp_name, (void *)obj); } static void dump_stack(_PyInterpreterFrame *frame, _PyStackRef *stack_pointer) { _PyFrame_SetStackPointer(frame, stack_pointer); _PyStackRef *locals_base = _PyFrame_GetLocalsArray(frame); _PyStackRef *stack_base = _PyFrame_Stackbase(frame); PyObject *exc = PyErr_GetRaisedException(); printf(" locals=["); for (_PyStackRef *ptr = locals_base; ptr < stack_base; ptr++) { if (ptr != locals_base) { printf(", "); } dump_item(*ptr); } printf("]\n"); if (stack_pointer < stack_base) { printf(" stack=%d\n", (int)(stack_pointer-stack_base)); } else { printf(" stack=["); for (_PyStackRef *ptr = stack_base; ptr < stack_pointer; ptr++) { if (ptr != stack_base) { printf(", "); } dump_item(*ptr); } printf("]\n"); } fflush(stdout); PyErr_SetRaisedException(exc); _PyFrame_GetStackPointer(frame); } #if defined(_Py_TIER2) && !defined(_Py_JIT) && defined(Py_DEBUG) static void dump_cache_item(_PyStackRef cache, int position, int depth) { if (position < depth) { dump_item(cache); } else { printf("---"); } } #endif static void lltrace_instruction(_PyInterpreterFrame *frame, _PyStackRef *stack_pointer, _Py_CODEUNIT *next_instr, int opcode, int oparg) { int offset = 0; if (frame->owner < FRAME_OWNED_BY_INTERPRETER) { dump_stack(frame, stack_pointer); offset = (int)(next_instr - _PyFrame_GetBytecode(frame)); } const char *opname = _PyOpcode_OpName[opcode]; assert(opname != NULL); if (OPCODE_HAS_ARG((int)_PyOpcode_Deopt[opcode])) { printf("%d: %s %d\n", offset * 2, opname, oparg); } else { printf("%d: %s\n", offset * 2, opname); } fflush(stdout); } static void lltrace_resume_frame(_PyInterpreterFrame *frame) { PyObject *fobj = PyStackRef_AsPyObjectBorrow(frame->f_funcobj); if (!PyStackRef_CodeCheck(frame->f_executable) || fobj == NULL || !PyFunction_Check(fobj) ) { printf("\nResuming frame.\n"); return; } PyFunctionObject *f = (PyFunctionObject *)fobj; PyObject *exc = PyErr_GetRaisedException(); PyObject *name = Py_XNewRef(FT_ATOMIC_LOAD_PTR_ACQUIRE(f->func_qualname)); if (name == NULL) { name = Py_XNewRef(FT_ATOMIC_LOAD_PTR_ACQUIRE(f->func_name)); } printf("\nResuming frame"); if (name) { printf(" for "); if (PyObject_Print(name, stdout, 0) < 0) { PyErr_Clear(); } Py_DECREF(name); } PyObject *module = Py_XNewRef(FT_ATOMIC_LOAD_PTR_ACQUIRE(f->func_module)); if (module) { printf(" in module "); if (PyObject_Print(module, stdout, 0) < 0) { PyErr_Clear(); } Py_DECREF(module); } printf("\n"); fflush(stdout); PyErr_SetRaisedException(exc); } static int maybe_lltrace_resume_frame(_PyInterpreterFrame *frame, PyObject *globals) { if (globals == NULL) { return 0; } if (frame->owner >= FRAME_OWNED_BY_INTERPRETER) { return 0; } int r = PyDict_Contains(globals, &_Py_ID(__lltrace__)); if (r < 0) { PyErr_Clear(); return 0; } int lltrace = r * 5; // Levels 1-4 only trace uops if (!lltrace) { // Can also be controlled by environment variable char *python_lltrace = Py_GETENV("PYTHON_LLTRACE"); if (python_lltrace != NULL && *python_lltrace >= '0') { lltrace = *python_lltrace - '0'; // TODO: Parse an int and all that } } if (lltrace >= 5) { lltrace_resume_frame(frame); } return lltrace; } #endif static void monitor_reraise(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr); static int monitor_stop_iteration(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr, PyObject *value); static void monitor_unwind(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr); static int monitor_handled(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr, PyObject *exc); static void monitor_throw(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr); static int get_exception_handler(PyCodeObject *, int, int*, int*, int*); #ifdef HAVE_ERRNO_H #include <errno.h> #endif typedef struct { _PyInterpreterFrame frame; _PyStackRef stack[1]; } _PyEntryFrame; static int do_monitor_exc(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr, int event) { assert(event < _PY_MONITORING_UNGROUPED_EVENTS); if (_PyFrame_GetCode(frame)->co_flags & CO_NO_MONITORING_EVENTS) { return 0; } PyObject *exc = PyErr_GetRaisedException(); assert(exc != NULL); int err = _Py_call_instrumentation_arg(tstate, event, frame, instr, exc); if (err == 0) { PyErr_SetRaisedException(exc); } else { assert(PyErr_Occurred()); Py_DECREF(exc); } return err; } static inline bool no_tools_for_global_event(PyThreadState *tstate, int event) { return tstate->interp->monitors.tools[event] == 0; } static inline bool no_tools_for_local_event(PyThreadState *tstate, _PyInterpreterFrame *frame, int event) { assert(event < _PY_MONITORING_UNGROUPED_EVENTS); _PyCoMonitoringData *data = _PyFrame_GetCode(frame)->_co_monitoring; if (data) { return data->active_monitors.tools[event] == 0; } else { return no_tools_for_global_event(tstate, event); } } static int monitor_handled(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr, PyObject *exc) { if (no_tools_for_local_event(tstate, frame, PY_MONITORING_EVENT_EXCEPTION_HANDLED)) { return 0; } return _Py_call_instrumentation_arg(tstate, PY_MONITORING_EVENT_EXCEPTION_HANDLED, frame, instr, exc); } static void monitor_throw(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr) { if (no_tools_for_local_event(tstate, frame, PY_MONITORING_EVENT_PY_THROW)) { return; } do_monitor_exc(tstate, frame, instr, PY_MONITORING_EVENT_PY_THROW); } static void monitor_reraise(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr) { if (no_tools_for_local_event(tstate, frame, PY_MONITORING_EVENT_RERAISE)) { return; } do_monitor_exc(tstate, frame, instr, PY_MONITORING_EVENT_RERAISE); } static int monitor_stop_iteration(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr, PyObject *value) { if (no_tools_for_local_event(tstate, frame, PY_MONITORING_EVENT_STOP_ITERATION)) { return 0; } assert(!PyErr_Occurred()); PyErr_SetObject(PyExc_StopIteration, value); int res = do_monitor_exc(tstate, frame, instr, PY_MONITORING_EVENT_STOP_ITERATION); if (res < 0) { return res; } PyErr_SetRaisedException(NULL); return 0; } static void monitor_unwind(PyThreadState *tstate, _PyInterpreterFrame *frame, _Py_CODEUNIT *instr) { if (no_tools_for_local_event(tstate, frame, PY_MONITORING_EVENT_PY_UNWIND)) { return; } do_monitor_exc(tstate, frame, instr, PY_MONITORING_EVENT_PY_UNWIND); } static inline unsigned char * scan_back_to_entry_start(unsigned char *p) { for (; (p[0]&128) == 0; p--); return p; } static inline unsigned char * skip_to_next_entry(unsigned char *p, unsigned char *end) { while (p < end && ((p[0] & 128) == 0)) { p++; } return p; } #define MAX_LINEAR_SEARCH 40 static Py_NO_INLINE int get_exception_handler(PyCodeObject *code, int index, int *level, int *handler, int *lasti) { unsigned char *start = (unsigned char *)PyBytes_AS_STRING(code->co_exceptiontable); unsigned char *end = start + PyBytes_GET_SIZE(code->co_exceptiontable); /* Invariants: * start_table == end_table OR * start_table points to a legal entry and end_table points * beyond the table or to a legal entry that is after index. */ if (end - start > MAX_LINEAR_SEARCH) { int offset; parse_varint(start, &offset); if (offset > index) { return 0; } do { unsigned char * mid = start + ((end-start)>>1); mid = scan_back_to_entry_start(mid); parse_varint(mid, &offset); if (offset > index) { end = mid; } else { start = mid; } } while (end - start > MAX_LINEAR_SEARCH); } unsigned char *scan = start; while (scan < end) { int start_offset, size; scan = parse_varint(scan, &start_offset); if (start_offset > index) { break; } scan = parse_varint(scan, &size); if (start_offset + size > index) { scan = parse_varint(scan, handler); int depth_and_lasti; parse_varint(scan, &depth_and_lasti); *level = depth_and_lasti >> 1; *lasti = depth_and_lasti & 1; return 1; } scan = skip_to_next_entry(scan, end); } return 0; } #ifdef Py_DEBUG #define ASSERT_WITHIN_STACK_BOUNDS(F, L) _Py_assert_within_stack_bounds(frame, stack_pointer, (F), (L)) #else #define ASSERT_WITHIN_STACK_BOUNDS(F, L) (void)0 #endif /* Logic for the raise statement (too complicated for inlining). This *consumes* a reference count to each of its arguments. */ static int do_raise(PyThreadState *tstate, PyObject *exc, PyObject *cause) { PyObject *type = NULL, *value = NULL; if (exc == NULL) { /* Reraise */ _PyErr_StackItem *exc_info = _PyErr_GetTopmostException(tstate); exc = exc_info->exc_value; if (Py_IsNone(exc) || exc == NULL) { _PyErr_SetString(tstate, PyExc_RuntimeError, "No active exception to reraise"); return 0; } Py_INCREF(exc); assert(PyExceptionInstance_Check(exc)); _PyErr_SetRaisedException(tstate, exc); return 1; } /* We support the following forms of raise: raise raise <instance> raise <type> */ if (PyExceptionClass_Check(exc)) { type = exc; value = _PyObject_CallNoArgs(exc); if (value == NULL) goto raise_error; if (!PyExceptionInstance_Check(value)) { _PyErr_Format(tstate, PyExc_TypeError, "calling %R should have returned an instance of " "BaseException, not %R", type, Py_TYPE(value)); goto raise_error; } } else if (PyExceptionInstance_Check(exc)) { value = exc; type = PyExceptionInstance_Class(exc); Py_INCREF(type); } else { /* Not something you can raise. You get an exception anyway, just not what you specified :-) */ Py_DECREF(exc); _PyErr_SetString(tstate, PyExc_TypeError, "exceptions must derive from BaseException"); goto raise_error; } assert(type != NULL); assert(value != NULL); if (cause) { PyObject *fixed_cause; if (PyExceptionClass_Check(cause)) { fixed_cause = _PyObject_CallNoArgs(cause); if (fixed_cause == NULL) goto raise_error; if (!PyExceptionInstance_Check(fixed_cause)) { _PyErr_Format(tstate, PyExc_TypeError, "calling %R should have returned an instance of " "BaseException, not %R", cause, Py_TYPE(fixed_cause)); Py_DECREF(fixed_cause); goto raise_error; } Py_DECREF(cause); } else if (PyExceptionInstance_Check(cause)) { fixed_cause = cause; } else if (Py_IsNone(cause)) { Py_DECREF(cause); fixed_cause = NULL; } else { _PyErr_SetString(tstate, PyExc_TypeError, "exception causes must derive from " "BaseException"); goto raise_error; } PyException_SetCause(value, fixed_cause); } _PyErr_SetObject(tstate, type, value); /* _PyErr_SetObject incref's its arguments */ Py_DECREF(value); Py_DECREF(type); return 0; raise_error: Py_XDECREF(value); Py_XDECREF(type); Py_XDECREF(cause); return 0; } /* Disable unused label warnings. They are handy for debugging, even if computed gotos aren't used. */ /* TBD - what about other compilers? */ #if defined(__GNUC__) || defined(__clang__) # pragma GCC diagnostic push # pragma GCC diagnostic ignored "-Wunused-label" #elif defined(_MSC_VER) /* MS_WINDOWS */ # pragma warning(push) # pragma warning(disable:4102) #endif |
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