Created
January 30, 2018 11:20
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typedef struct _frame { | |
PyObject_VAR_HEAD | |
struct _frame *f_back; /* previous frame, or NULL */ | |
PyCodeObject *f_code; /* code segment */ | |
PyObject *f_builtins; /* builtin symbol table (PyDictObject) */ | |
PyObject *f_globals; /* global symbol table (PyDictObject) */ | |
PyObject *f_locals; /* local symbol table (any mapping) */ | |
PyObject **f_valuestack; /* points after the last local */ | |
/* Next free slot in f_valuestack. Frame creation sets to f_valuestack. | |
Frame evaluation usually NULLs it, but a frame that yields sets it | |
to the current stack top. */ | |
PyObject **f_stacktop; | |
PyObject *f_trace; /* Trace function */ | |
/* In a generator, we need to be able to swap between the exception | |
state inside the generator and the exception state of the calling | |
frame (which shouldn't be impacted when the generator "yields" | |
from an except handler). | |
These three fields exist exactly for that, and are unused for | |
non-generator frames. See the save_exc_state and swap_exc_state | |
functions in ceval.c for details of their use. */ | |
PyObject *f_exc_type, *f_exc_value, *f_exc_traceback; | |
/* Borrowed reference to a generator, or NULL */ | |
PyObject *f_gen; | |
int f_lasti; /* Last instruction if called */ | |
/* Call PyFrame_GetLineNumber() instead of reading this field | |
directly. As of 2.3 f_lineno is only valid when tracing is | |
active (i.e. when f_trace is set). At other times we use | |
PyCode_Addr2Line to calculate the line from the current | |
bytecode index. */ | |
int f_lineno; /* Current line number */ | |
int f_iblock; /* index in f_blockstack */ | |
char f_executing; /* whether the frame is still executing */ | |
PyTryBlock f_blockstack[CO_MAXBLOCKS]; /* for try and loop blocks */ | |
PyObject *f_localsplus[1]; /* locals+stack, dynamically sized */ | |
} PyFrameObject; |
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