Edit File: frameobject.h
/* Frame object interface */ #ifndef Py_FRAMEOBJECT_H #define Py_FRAMEOBJECT_H #ifdef __cplusplus extern "C" { #endif typedef struct { int b_type; /* what kind of block this is */ int b_handler; /* where to jump to find handler */ int b_level; /* value stack level to pop to */ } PyTryBlock; 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 */ /* If an exception is raised in this frame, the next three are used to * record the exception info (if any) originally in the thread state. See * comments before set_exc_info() -- it's not obvious. * Invariant: if _type is NULL, then so are _value and _traceback. * Desired invariant: all three are NULL, or all three are non-NULL. That * one isn't currently true, but "should be". */ PyObject *f_exc_type, *f_exc_value, *f_exc_traceback; PyThreadState *f_tstate; 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 */ PyTryBlock f_blockstack[CO_MAXBLOCKS]; /* for try and loop blocks */ PyObject *f_localsplus[1]; /* locals+stack, dynamically sized */ } PyFrameObject; /* Standard object interface */ PyAPI_DATA(PyTypeObject) PyFrame_Type; #define PyFrame_Check(op) (Py_TYPE(op) == &PyFrame_Type) #define PyFrame_IsRestricted(f) \ ((f)->f_tstate && (f)->f_builtins != (f)->f_tstate->interp->builtins) PyAPI_FUNC(PyFrameObject *) PyFrame_New(PyThreadState *, PyCodeObject *, PyObject *, PyObject *); /* The rest of the interface is specific for frame objects */ /* Block management functions */ PyAPI_FUNC(void) PyFrame_BlockSetup(PyFrameObject *, int, int, int); PyAPI_FUNC(PyTryBlock *) PyFrame_BlockPop(PyFrameObject *); /* Extend the value stack */ PyAPI_FUNC(PyObject **) PyFrame_ExtendStack(PyFrameObject *, int, int); /* Conversions between "fast locals" and locals in dictionary */ PyAPI_FUNC(void) PyFrame_LocalsToFast(PyFrameObject *, int); PyAPI_FUNC(void) PyFrame_FastToLocals(PyFrameObject *); PyAPI_FUNC(int) PyFrame_ClearFreeList(void); PyAPI_FUNC(void) _PyFrame_DebugMallocStats(FILE *out); /* Return the line of code the frame is currently executing. */ PyAPI_FUNC(int) PyFrame_GetLineNumber(PyFrameObject *); #ifdef __cplusplus } #endif #endif /* !Py_FRAMEOBJECT_H */
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