diff options
author | shadchin <shadchin@yandex-team.ru> | 2022-04-18 12:39:32 +0300 |
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committer | shadchin <shadchin@yandex-team.ru> | 2022-04-18 12:39:32 +0300 |
commit | d4be68e361f4258cf0848fc70018dfe37a2acc24 (patch) | |
tree | 153e294cd97ac8b5d7a989612704a0c1f58e8ad4 /contrib/tools/python3/src/Objects/frameobject.c | |
parent | 260c02f5ccf242d9d9b8a873afaf6588c00237d6 (diff) | |
download | ydb-d4be68e361f4258cf0848fc70018dfe37a2acc24.tar.gz |
IGNIETFERRO-1816 Update Python 3 from 3.9.12 to 3.10.4
ref:9f96be6d02ee8044fdd6f124b799b270c20ce641
Diffstat (limited to 'contrib/tools/python3/src/Objects/frameobject.c')
-rw-r--r-- | contrib/tools/python3/src/Objects/frameobject.c | 435 |
1 files changed, 201 insertions, 234 deletions
diff --git a/contrib/tools/python3/src/Objects/frameobject.c b/contrib/tools/python3/src/Objects/frameobject.c index 4ae17bcfc2..d02cf9d3ba 100644 --- a/contrib/tools/python3/src/Objects/frameobject.c +++ b/contrib/tools/python3/src/Objects/frameobject.c @@ -1,27 +1,34 @@ /* Frame object implementation */ #include "Python.h" -#include "pycore_object.h" -#include "pycore_gc.h" // _PyObject_GC_IS_TRACKED() +#include "pycore_ceval.h" // _PyEval_BuiltinsFromGlobals() +#include "pycore_moduleobject.h" // _PyModule_GetDict() +#include "pycore_object.h" // _PyObject_GC_UNTRACK() -#include "code.h" -#include "frameobject.h" -#include "opcode.h" +#include "frameobject.h" // PyFrameObject +#include "opcode.h" // EXTENDED_ARG #include "structmember.h" // PyMemberDef #define OFF(x) offsetof(PyFrameObject, x) static PyMemberDef frame_memberlist[] = { {"f_back", T_OBJECT, OFF(f_back), READONLY}, - {"f_code", T_OBJECT, OFF(f_code), READONLY|READ_RESTRICTED}, + {"f_code", T_OBJECT, OFF(f_code), READONLY|PY_AUDIT_READ}, {"f_builtins", T_OBJECT, OFF(f_builtins), READONLY}, {"f_globals", T_OBJECT, OFF(f_globals), READONLY}, - {"f_lasti", T_INT, OFF(f_lasti), READONLY}, {"f_trace_lines", T_BOOL, OFF(f_trace_lines), 0}, {"f_trace_opcodes", T_BOOL, OFF(f_trace_opcodes), 0}, {NULL} /* Sentinel */ }; +static struct _Py_frame_state * +get_frame_state(void) +{ + PyInterpreterState *interp = _PyInterpreterState_GET(); + return &interp->frame; +} + + static PyObject * frame_getlocals(PyFrameObject *f, void *closure) { @@ -35,18 +42,33 @@ int PyFrame_GetLineNumber(PyFrameObject *f) { assert(f != NULL); - if (f->f_trace) { + if (f->f_lineno != 0) { return f->f_lineno; } else { - return PyCode_Addr2Line(f->f_code, f->f_lasti); + return PyCode_Addr2Line(f->f_code, f->f_lasti*sizeof(_Py_CODEUNIT)); } } static PyObject * frame_getlineno(PyFrameObject *f, void *closure) { - return PyLong_FromLong(PyFrame_GetLineNumber(f)); + int lineno = PyFrame_GetLineNumber(f); + if (lineno < 0) { + Py_RETURN_NONE; + } + else { + return PyLong_FromLong(lineno); + } +} + +static PyObject * +frame_getlasti(PyFrameObject *f, void *closure) +{ + if (f->f_lasti < 0) { + return PyLong_FromLong(-1); + } + return PyLong_FromLong(f->f_lasti*sizeof(_Py_CODEUNIT)); } @@ -128,7 +150,7 @@ markblocks(PyCodeObject *code_obj, int len) case POP_JUMP_IF_FALSE: case POP_JUMP_IF_TRUE: case JUMP_IF_NOT_EXC_MATCH: - j = get_arg(code, i) / sizeof(_Py_CODEUNIT); + j = get_arg(code, i); assert(j < len); if (blocks[j] == -1 && j < i) { todo = 1; @@ -138,7 +160,7 @@ markblocks(PyCodeObject *code_obj, int len) blocks[i+1] = block_stack; break; case JUMP_ABSOLUTE: - j = get_arg(code, i) / sizeof(_Py_CODEUNIT); + j = get_arg(code, i); assert(j < len); if (blocks[j] == -1 && j < i) { todo = 1; @@ -147,7 +169,7 @@ markblocks(PyCodeObject *code_obj, int len) blocks[j] = block_stack; break; case SETUP_FINALLY: - j = get_arg(code, i) / sizeof(_Py_CODEUNIT) + i + 1; + j = get_arg(code, i) + i + 1; assert(j < len); except_stack = push_block(block_stack, Except); assert(blocks[j] == -1 || blocks[j] == except_stack); @@ -157,7 +179,7 @@ markblocks(PyCodeObject *code_obj, int len) break; case SETUP_WITH: case SETUP_ASYNC_WITH: - j = get_arg(code, i) / sizeof(_Py_CODEUNIT) + i + 1; + j = get_arg(code, i) + i + 1; assert(j < len); except_stack = push_block(block_stack, Except); assert(blocks[j] == -1 || blocks[j] == except_stack); @@ -166,7 +188,7 @@ markblocks(PyCodeObject *code_obj, int len) blocks[i+1] = block_stack; break; case JUMP_FORWARD: - j = get_arg(code, i) / sizeof(_Py_CODEUNIT) + i + 1; + j = get_arg(code, i) + i + 1; assert(j < len); assert(blocks[j] == -1 || blocks[j] == block_stack); blocks[j] = block_stack; @@ -179,7 +201,7 @@ markblocks(PyCodeObject *code_obj, int len) case FOR_ITER: blocks[i+1] = block_stack; block_stack = pop_block(block_stack); - j = get_arg(code, i) / sizeof(_Py_CODEUNIT) + i + 1; + j = get_arg(code, i) + i + 1; assert(j < len); assert(blocks[j] == -1 || blocks[j] == block_stack); blocks[j] = block_stack; @@ -240,36 +262,22 @@ explain_incompatible_block_stack(int64_t to_stack) static int * marklines(PyCodeObject *code, int len) { + PyCodeAddressRange bounds; + _PyCode_InitAddressRange(code, &bounds); + assert (bounds.ar_end == 0); + int *linestarts = PyMem_New(int, len); if (linestarts == NULL) { return NULL; } - Py_ssize_t size = PyBytes_GET_SIZE(code->co_lnotab) / 2; - unsigned char *p = (unsigned char*)PyBytes_AS_STRING(code->co_lnotab); - int line = code->co_firstlineno; - int addr = 0; - int index = 0; - while (--size >= 0) { - addr += *p++; - if (index*2 < addr) { - linestarts[index++] = line; - } - while (index*2 < addr) { - linestarts[index++] = -1; - if (index >= len) { - break; - } - } - line += (signed char)*p; - p++; - } - if (index < len) { - linestarts[index++] = line; + for (int i = 0; i < len; i++) { + linestarts[i] = -1; } - while (index < len) { - linestarts[index++] = -1; + + while (PyLineTable_NextAddressRange(&bounds)) { + assert(bounds.ar_start/(int)sizeof(_Py_CODEUNIT) < len); + linestarts[bounds.ar_start/sizeof(_Py_CODEUNIT)] = bounds.ar_line; } - assert(index == len); return linestarts; } @@ -291,17 +299,20 @@ first_line_not_before(int *lines, int len, int line) static void frame_stack_pop(PyFrameObject *f) { - PyObject *v = (*--f->f_stacktop); + assert(f->f_stackdepth >= 0); + f->f_stackdepth--; + PyObject *v = f->f_valuestack[f->f_stackdepth]; Py_DECREF(v); } static void frame_block_unwind(PyFrameObject *f) { + assert(f->f_stackdepth >= 0); assert(f->f_iblock > 0); f->f_iblock--; PyTryBlock *b = &f->f_blockstack[f->f_iblock]; - intptr_t delta = (f->f_stacktop - f->f_valuestack) - b->b_level; + intptr_t delta = f->f_stackdepth - b->b_level; while (delta > 0) { frame_stack_pop(f); delta--; @@ -343,33 +354,36 @@ frame_setlineno(PyFrameObject *f, PyObject* p_new_lineno, void *Py_UNUSED(ignore return -1; } - /* Upon the 'call' trace event of a new frame, f->f_lasti is -1 and - * f->f_trace is NULL, check first on the first condition. - * Forbidding jumps from the 'call' event of a new frame is a side effect - * of allowing to set f_lineno only from trace functions. */ - if (f->f_lasti == -1) { - PyErr_Format(PyExc_ValueError, + /* + * This code preserves the historical restrictions on + * setting the line number of a frame. + * Jumps are forbidden on a 'return' trace event (except after a yield). + * Jumps from 'call' trace events are also forbidden. + * In addition, jumps are forbidden when not tracing, + * as this is a debugging feature. + */ + switch(f->f_state) { + case FRAME_CREATED: + PyErr_Format(PyExc_ValueError, "can't jump from the 'call' trace event of a new frame"); - return -1; - } - - /* You can only do this from within a trace function, not via - * _getframe or similar hackery. */ - if (!f->f_trace) { - PyErr_Format(PyExc_ValueError, - "f_lineno can only be set by a trace function"); - return -1; - } - - /* Forbid jumps upon a 'return' trace event (except after executing a - * YIELD_VALUE or YIELD_FROM opcode, f_stacktop is not NULL in that case) - * and upon an 'exception' trace event. - * Jumps from 'call' trace events have already been forbidden above for new - * frames, so this check does not change anything for 'call' events. */ - if (f->f_stacktop == NULL) { - PyErr_SetString(PyExc_ValueError, + return -1; + case FRAME_RETURNED: + case FRAME_UNWINDING: + case FRAME_RAISED: + case FRAME_CLEARED: + PyErr_SetString(PyExc_ValueError, "can only jump from a 'line' trace event"); - return -1; + return -1; + case FRAME_EXECUTING: + case FRAME_SUSPENDED: + /* You can only do this from within a trace function, not via + * _getframe or similar hackery. */ + if (!f->f_trace) { + PyErr_Format(PyExc_ValueError, + "f_lineno can only be set by a trace function"); + return -1; + } + break; } int new_lineno; @@ -423,7 +437,7 @@ frame_setlineno(PyFrameObject *f, PyObject* p_new_lineno, void *Py_UNUSED(ignore int64_t target_block_stack = -1; int64_t best_block_stack = -1; int best_addr = -1; - int64_t start_block_stack = blocks[f->f_lasti/sizeof(_Py_CODEUNIT)]; + int64_t start_block_stack = blocks[f->f_lasti]; const char *msg = "cannot find bytecode for specified line"; for (int i = 0; i < len; i++) { if (lines[i] == new_lineno) { @@ -432,7 +446,7 @@ frame_setlineno(PyFrameObject *f, PyObject* p_new_lineno, void *Py_UNUSED(ignore msg = NULL; if (target_block_stack > best_block_stack) { best_block_stack = target_block_stack; - best_addr = i*sizeof(_Py_CODEUNIT); + best_addr = i; } } else if (msg) { @@ -475,8 +489,8 @@ frame_setlineno(PyFrameObject *f, PyObject* p_new_lineno, void *Py_UNUSED(ignore start_block_stack = pop_block(start_block_stack); } - /* Finally set the new f_lineno and f_lasti and return OK. */ - f->f_lineno = new_lineno; + /* Finally set the new f_lasti and return OK. */ + f->f_lineno = 0; f->f_lasti = best_addr; return 0; } @@ -497,11 +511,9 @@ frame_gettrace(PyFrameObject *f, void *closure) static int frame_settrace(PyFrameObject *f, PyObject* v, void *closure) { - /* We rely on f_lineno being accurate when f_trace is set. */ - f->f_lineno = PyFrame_GetLineNumber(f); - - if (v == Py_None) + if (v == Py_None) { v = NULL; + } Py_XINCREF(v); Py_XSETREF(f->f_trace, v); @@ -514,6 +526,7 @@ static PyGetSetDef frame_getsetlist[] = { {"f_lineno", (getter)frame_getlineno, (setter)frame_setlineno, NULL}, {"f_trace", (getter)frame_gettrace, (setter)frame_settrace, NULL}, + {"f_lasti", (getter)frame_getlasti, NULL, NULL}, {0} }; @@ -561,31 +574,25 @@ static PyGetSetDef frame_getsetlist[] = { /* max value for numfree */ #define PyFrame_MAXFREELIST 200 -#if PyFrame_MAXFREELIST > 0 -static PyFrameObject *free_list = NULL; -static int numfree = 0; /* number of frames currently in free_list */ -#endif - static void _Py_HOT_FUNCTION frame_dealloc(PyFrameObject *f) { - PyObject **p, **valuestack; - PyCodeObject *co; - - if (_PyObject_GC_IS_TRACKED(f)) + if (_PyObject_GC_IS_TRACKED(f)) { _PyObject_GC_UNTRACK(f); + } Py_TRASHCAN_BEGIN(f, frame_dealloc); /* Kill all local variables */ - valuestack = f->f_valuestack; - for (p = f->f_localsplus; p < valuestack; p++) + PyObject **valuestack = f->f_valuestack; + for (PyObject **p = f->f_localsplus; p < valuestack; p++) { Py_CLEAR(*p); + } /* Free stack */ - if (f->f_stacktop != NULL) { - for (p = valuestack; p < f->f_stacktop; p++) - Py_XDECREF(*p); + for (int i = 0; i < f->f_stackdepth; i++) { + Py_XDECREF(f->f_valuestack[i]); } + f->f_stackdepth = 0; Py_XDECREF(f->f_back); Py_DECREF(f->f_builtins); @@ -593,19 +600,24 @@ frame_dealloc(PyFrameObject *f) Py_CLEAR(f->f_locals); Py_CLEAR(f->f_trace); - co = f->f_code; + PyCodeObject *co = f->f_code; if (co->co_zombieframe == NULL) { co->co_zombieframe = f; } -#if PyFrame_MAXFREELIST > 0 - else if (numfree < PyFrame_MAXFREELIST) { - ++numfree; - f->f_back = free_list; - free_list = f; - } -#endif else { - PyObject_GC_Del(f); + struct _Py_frame_state *state = get_frame_state(); +#ifdef Py_DEBUG + // frame_dealloc() must not be called after _PyFrame_Fini() + assert(state->numfree != -1); +#endif + if (state->numfree < PyFrame_MAXFREELIST) { + ++state->numfree; + f->f_back = state->free_list; + state->free_list = f; + } + else { + PyObject_GC_Del(f); + } } Py_DECREF(co); @@ -638,10 +650,8 @@ frame_traverse(PyFrameObject *f, visitproc visit, void *arg) } /* stack */ - if (f->f_stacktop != NULL) { - for (PyObject **p = f->f_valuestack; p < f->f_stacktop; p++) { - Py_VISIT(*p); - } + for (int i = 0; i < f->f_stackdepth; i++) { + Py_VISIT(f->f_valuestack[i]); } return 0; } @@ -654,9 +664,7 @@ frame_tp_clear(PyFrameObject *f) * frame may also point to this frame, believe itself to still be * active, and try cleaning up this frame again. */ - PyObject **oldtop = f->f_stacktop; - f->f_stacktop = NULL; - f->f_executing = 0; + f->f_state = FRAME_CLEARED; Py_CLEAR(f->f_trace); @@ -667,18 +675,17 @@ frame_tp_clear(PyFrameObject *f) } /* stack */ - if (oldtop != NULL) { - for (PyObject **p = f->f_valuestack; p < oldtop; p++) { - Py_CLEAR(*p); - } + for (int i = 0; i < f->f_stackdepth; i++) { + Py_CLEAR(f->f_valuestack[i]); } + f->f_stackdepth = 0; return 0; } static PyObject * frame_clear(PyFrameObject *f, PyObject *Py_UNUSED(ignored)) { - if (f->f_executing) { + if (_PyFrame_IsExecuting(f)) { PyErr_SetString(PyExc_RuntimeError, "cannot clear an executing frame"); return NULL; @@ -770,9 +777,7 @@ _Py_IDENTIFIER(__builtins__); static inline PyFrameObject* frame_alloc(PyCodeObject *code) { - PyFrameObject *f; - - f = code->co_zombieframe; + PyFrameObject *f = code->co_zombieframe; if (f != NULL) { code->co_zombieframe = NULL; _Py_NewReference((PyObject *)f); @@ -783,21 +788,23 @@ frame_alloc(PyCodeObject *code) Py_ssize_t ncells = PyTuple_GET_SIZE(code->co_cellvars); Py_ssize_t nfrees = PyTuple_GET_SIZE(code->co_freevars); Py_ssize_t extras = code->co_stacksize + code->co_nlocals + ncells + nfrees; -#if PyFrame_MAXFREELIST > 0 - if (free_list == NULL) -#endif + struct _Py_frame_state *state = get_frame_state(); + if (state->free_list == NULL) { f = PyObject_GC_NewVar(PyFrameObject, &PyFrame_Type, extras); if (f == NULL) { return NULL; } } -#if PyFrame_MAXFREELIST > 0 else { - assert(numfree > 0); - --numfree; - f = free_list; - free_list = free_list->f_back; +#ifdef Py_DEBUG + // frame_alloc() must not be called after _PyFrame_Fini() + assert(state->numfree != -1); +#endif + assert(state->numfree > 0); + --state->numfree; + f = state->free_list; + state->free_list = state->free_list->f_back; if (Py_SIZE(f) < extras) { PyFrameObject *new_f = PyObject_GC_Resize(PyFrameObject, f, extras); if (new_f == NULL) { @@ -808,132 +815,72 @@ frame_alloc(PyCodeObject *code) } _Py_NewReference((PyObject *)f); } -#endif - f->f_code = code; extras = code->co_nlocals + ncells + nfrees; f->f_valuestack = f->f_localsplus + extras; - for (Py_ssize_t i=0; i<extras; i++) { + for (Py_ssize_t i=0; i < extras; i++) { f->f_localsplus[i] = NULL; } - f->f_locals = NULL; - f->f_trace = NULL; return f; } -static inline PyObject * -frame_get_builtins(PyFrameObject *back, PyObject *globals) -{ - PyObject *builtins; - - if (back != NULL && back->f_globals == globals) { - /* If we share the globals, we share the builtins. - Save a lookup and a call. */ - builtins = back->f_builtins; - assert(builtins != NULL); - Py_INCREF(builtins); - return builtins; - } - - builtins = _PyDict_GetItemIdWithError(globals, &PyId___builtins__); - if (builtins != NULL && PyModule_Check(builtins)) { - builtins = PyModule_GetDict(builtins); - assert(builtins != NULL); - } - if (builtins != NULL) { - Py_INCREF(builtins); - return builtins; - } - - if (PyErr_Occurred()) { - return NULL; - } - - /* No builtins! Make up a minimal one. - Give them 'None', at least. */ - builtins = PyDict_New(); - if (builtins == NULL) { - return NULL; - } - if (PyDict_SetItemString(builtins, "None", Py_None) < 0) { - Py_DECREF(builtins); - return NULL; - } - return builtins; -} - - PyFrameObject* _Py_HOT_FUNCTION -_PyFrame_New_NoTrack(PyThreadState *tstate, PyCodeObject *code, - PyObject *globals, PyObject *locals) +_PyFrame_New_NoTrack(PyThreadState *tstate, PyFrameConstructor *con, PyObject *locals) { -#ifdef Py_DEBUG - if (code == NULL || globals == NULL || !PyDict_Check(globals) || - (locals != NULL && !PyMapping_Check(locals))) { - PyErr_BadInternalCall(); - return NULL; - } -#endif - - PyFrameObject *back = tstate->frame; - PyObject *builtins = frame_get_builtins(back, globals); - if (builtins == NULL) { - return NULL; - } + assert(con != NULL); + assert(con->fc_globals != NULL); + assert(con->fc_builtins != NULL); + assert(con->fc_code != NULL); + assert(locals == NULL || PyMapping_Check(locals)); - PyFrameObject *f = frame_alloc(code); + PyFrameObject *f = frame_alloc((PyCodeObject *)con->fc_code); if (f == NULL) { - Py_DECREF(builtins); return NULL; } - f->f_stacktop = f->f_valuestack; - f->f_builtins = builtins; - Py_XINCREF(back); - f->f_back = back; - Py_INCREF(code); - Py_INCREF(globals); - f->f_globals = globals; - /* Most functions have CO_NEWLOCALS and CO_OPTIMIZED set. */ - if ((code->co_flags & (CO_NEWLOCALS | CO_OPTIMIZED)) == - (CO_NEWLOCALS | CO_OPTIMIZED)) - ; /* f_locals = NULL; will be set by PyFrame_FastToLocals() */ - else if (code->co_flags & CO_NEWLOCALS) { - locals = PyDict_New(); - if (locals == NULL) { - Py_DECREF(f); - return NULL; - } - f->f_locals = locals; - } - else { - if (locals == NULL) - locals = globals; - Py_INCREF(locals); - f->f_locals = locals; - } - + f->f_back = (PyFrameObject*)Py_XNewRef(tstate->frame); + f->f_code = (PyCodeObject *)Py_NewRef(con->fc_code); + f->f_builtins = Py_NewRef(con->fc_builtins); + f->f_globals = Py_NewRef(con->fc_globals); + f->f_locals = Py_XNewRef(locals); + // f_valuestack initialized by frame_alloc() + f->f_trace = NULL; + f->f_stackdepth = 0; + f->f_trace_lines = 1; + f->f_trace_opcodes = 0; + f->f_gen = NULL; f->f_lasti = -1; - f->f_lineno = code->co_firstlineno; + f->f_lineno = 0; f->f_iblock = 0; - f->f_executing = 0; - f->f_gen = NULL; - f->f_trace_opcodes = 0; - f->f_trace_lines = 1; - - assert(f->f_code != NULL); - + f->f_state = FRAME_CREATED; + // f_blockstack and f_localsplus initialized by frame_alloc() return f; } +/* Legacy API */ PyFrameObject* PyFrame_New(PyThreadState *tstate, PyCodeObject *code, PyObject *globals, PyObject *locals) { - PyFrameObject *f = _PyFrame_New_NoTrack(tstate, code, globals, locals); - if (f) + PyObject *builtins = _PyEval_BuiltinsFromGlobals(tstate, globals); // borrowed ref + if (builtins == NULL) { + return NULL; + } + PyFrameConstructor desc = { + .fc_globals = globals, + .fc_builtins = builtins, + .fc_name = code->co_name, + .fc_qualname = code->co_name, + .fc_code = (PyObject *)code, + .fc_defaults = NULL, + .fc_kwdefaults = NULL, + .fc_closure = NULL + }; + PyFrameObject *f = _PyFrame_New_NoTrack(tstate, &desc, locals); + if (f) { _PyObject_GC_TRACK(f); + } return f; } @@ -1177,34 +1124,36 @@ PyFrame_LocalsToFast(PyFrameObject *f, int clear) /* Clear out the free list */ void -_PyFrame_ClearFreeList(void) +_PyFrame_ClearFreeList(PyInterpreterState *interp) { -#if PyFrame_MAXFREELIST > 0 - while (free_list != NULL) { - PyFrameObject *f = free_list; - free_list = free_list->f_back; + struct _Py_frame_state *state = &interp->frame; + while (state->free_list != NULL) { + PyFrameObject *f = state->free_list; + state->free_list = state->free_list->f_back; PyObject_GC_Del(f); - --numfree; + --state->numfree; } - assert(numfree == 0); -#endif + assert(state->numfree == 0); } void -_PyFrame_Fini(void) +_PyFrame_Fini(PyInterpreterState *interp) { - _PyFrame_ClearFreeList(); + _PyFrame_ClearFreeList(interp); +#ifdef Py_DEBUG + struct _Py_frame_state *state = &interp->frame; + state->numfree = -1; +#endif } /* Print summary info about the state of the optimized allocator */ void _PyFrame_DebugMallocStats(FILE *out) { -#if PyFrame_MAXFREELIST > 0 + struct _Py_frame_state *state = get_frame_state(); _PyDebugAllocatorStats(out, "free PyFrameObject", - numfree, sizeof(PyFrameObject)); -#endif + state->numfree, sizeof(PyFrameObject)); } @@ -1227,3 +1176,21 @@ PyFrame_GetBack(PyFrameObject *frame) Py_XINCREF(back); return back; } + +PyObject* +_PyEval_BuiltinsFromGlobals(PyThreadState *tstate, PyObject *globals) +{ + PyObject *builtins = _PyDict_GetItemIdWithError(globals, &PyId___builtins__); + if (builtins) { + if (PyModule_Check(builtins)) { + builtins = _PyModule_GetDict(builtins); + assert(builtins != NULL); + } + return builtins; + } + if (PyErr_Occurred()) { + return NULL; + } + + return _PyEval_GetBuiltins(tstate); +} |