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python3.2  3.2.2
Defines | Typedefs | Enumerations | Functions | Variables
ceval.c File Reference
#include "Python.h"
#include "code.h"
#include "frameobject.h"
#include "opcode.h"
#include "structmember.h"
#include <ctype.h>

Go to the source code of this file.

Defines

#define PY_LOCAL_AGGRESSIVE
#define READ_TIMESTAMP(var)
#define CALL_FLAG_VAR   1
#define CALL_FLAG_KW   2
#define NAME_ERROR_MSG   "name '%.200s' is not defined"
#define GLOBAL_NAME_ERROR_MSG   "global name '%.200s' is not defined"
#define UNBOUNDLOCAL_ERROR_MSG   "local variable '%.200s' referenced before assignment"
#define UNBOUNDFREE_ERROR_MSG
#define PCALL(O)
#define GIL_REQUEST   0
#define COMPUTE_EVAL_BREAKER()
#define SIGNAL_PENDING_CALLS()
#define UNSIGNAL_PENDING_CALLS()
#define SIGNAL_ASYNC_EXC()
#define UNSIGNAL_ASYNC_EXC()   do { pending_async_exc = 0; COMPUTE_EVAL_BREAKER(); } while (0)
#define NPENDINGCALLS   32
#define Py_DEFAULT_RECURSION_LIMIT   1000
#define USE_COMPUTED_GOTOS   0
#define TARGET(op)   case op:
#define TARGET_WITH_IMPL(op, impl)
#define DISPATCH()   continue
#define FAST_DISPATCH()   goto fast_next_opcode
#define GETITEM(v, i)   PyTuple_GET_ITEM((PyTupleObject *)(v), (i))
#define INSTR_OFFSET()   ((int)(next_instr - first_instr))
#define NEXTOP()   (*next_instr++)
#define NEXTARG()   (next_instr += 2, (next_instr[-1]<<8) + next_instr[-2])
#define PEEKARG()   ((next_instr[2]<<8) + next_instr[1])
#define JUMPTO(x)   (next_instr = first_instr + (x))
#define JUMPBY(x)   (next_instr += (x))
#define PREDICT(op)   if (*next_instr == op) goto PRED_##op
#define PREDICTED(op)   PRED_##op: next_instr++
#define PREDICTED_WITH_ARG(op)   PRED_##op: oparg = PEEKARG(); next_instr += 3
#define STACK_LEVEL()   ((int)(stack_pointer - f->f_valuestack))
#define EMPTY()   (STACK_LEVEL() == 0)
#define TOP()   (stack_pointer[-1])
#define SECOND()   (stack_pointer[-2])
#define THIRD()   (stack_pointer[-3])
#define FOURTH()   (stack_pointer[-4])
#define PEEK(n)   (stack_pointer[-(n)])
#define SET_TOP(v)   (stack_pointer[-1] = (v))
#define SET_SECOND(v)   (stack_pointer[-2] = (v))
#define SET_THIRD(v)   (stack_pointer[-3] = (v))
#define SET_FOURTH(v)   (stack_pointer[-4] = (v))
#define SET_VALUE(n, v)   (stack_pointer[-(n)] = (v))
#define BASIC_STACKADJ(n)   (stack_pointer += n)
#define BASIC_PUSH(v)   (*stack_pointer++ = (v))
#define BASIC_POP()   (*--stack_pointer)
#define PUSH(v)   BASIC_PUSH(v)
#define POP()   BASIC_POP()
#define STACKADJ(n)   BASIC_STACKADJ(n)
#define EXT_POP(STACK_POINTER)   (*--(STACK_POINTER))
#define GETLOCAL(i)   (fastlocals[i])
#define SETLOCAL(i, value)
#define UNWIND_BLOCK(b)
#define UNWIND_EXCEPT_HANDLER(b)
#define SAVE_EXC_STATE()
#define SWAP_EXC_STATE()
#define RESTORE_AND_CLEAR_EXC_STATE()
#define C_TRACE(x, call)
#define CANNOT_CATCH_MSG

Typedefs

typedef PyObject *(* callproc )(PyObject *, PyObject *, PyObject *)

Enumerations

enum  why_code {
  WHY_NOT = 0x0001, WHY_EXCEPTION = 0x0002, WHY_RERAISE = 0x0004, WHY_RETURN = 0x0008,
  WHY_BREAK = 0x0010, WHY_CONTINUE = 0x0020, WHY_YIELD = 0x0040, WHY_SILENCED = 0x0080
}

Functions

static PyObjectcall_function (PyObject ***, int)
static PyObjectfast_function (PyObject *, PyObject ***, int, int, int)
static PyObjectdo_call (PyObject *, PyObject ***, int, int)
static PyObjectext_do_call (PyObject *, PyObject ***, int, int, int)
static PyObjectupdate_keyword_args (PyObject *, int, PyObject ***, PyObject *)
static PyObjectupdate_star_args (int, int, PyObject *, PyObject ***)
static PyObjectload_args (PyObject ***, int)
static int call_trace (Py_tracefunc, PyObject *, PyFrameObject *, int, PyObject *)
static int call_trace_protected (Py_tracefunc, PyObject *, PyFrameObject *, int, PyObject *)
static void call_exc_trace (Py_tracefunc, PyObject *, PyFrameObject *)
static int maybe_call_line_trace (Py_tracefunc, PyObject *, PyFrameObject *, int *, int *, int *)
static PyObjectcmp_outcome (int, PyObject *, PyObject *)
static PyObjectimport_from (PyObject *, PyObject *)
static int import_all_from (PyObject *, PyObject *)
static void format_exc_check_arg (PyObject *, const char *, PyObject *)
static void format_exc_unbound (PyCodeObject *co, int oparg)
static PyObjectunicode_concatenate (PyObject *, PyObject *, PyFrameObject *, unsigned char *)
static PyObjectspecial_lookup (PyObject *, char *, PyObject **)
PyObjectPyEval_GetCallStats (PyObject *self)
void _PyEval_SignalAsyncExc (void)
PyThreadStatePyEval_SaveThread (void)
void PyEval_RestoreThread (PyThreadState *tstate)
int Py_AddPendingCall (int(*func)(void *), void *arg)
int Py_MakePendingCalls (void)
int Py_GetRecursionLimit (void)
void Py_SetRecursionLimit (int new_limit)
int _Py_CheckRecursiveCall (char *where)
static enum why_code do_raise (PyObject *, PyObject *)
static int unpack_iterable (PyObject *, int, int, PyObject **)
PyObjectPyEval_EvalCode (PyObject *co, PyObject *globals, PyObject *locals)
PyObjectPyEval_EvalFrame (PyFrameObject *f)
PyObjectPyEval_EvalFrameEx (PyFrameObject *f, int throwflag)
PyObjectPyEval_EvalCodeEx (PyObject *_co, PyObject *globals, PyObject *locals, PyObject **args, int argcount, PyObject **kws, int kwcount, PyObject **defs, int defcount, PyObject *kwdefs, PyObject *closure)
PyObject_PyEval_CallTracing (PyObject *func, PyObject *args)
void PyEval_SetProfile (Py_tracefunc func, PyObject *arg)
void PyEval_SetTrace (Py_tracefunc func, PyObject *arg)
PyObjectPyEval_GetBuiltins (void)
PyObjectPyEval_GetLocals (void)
PyObjectPyEval_GetGlobals (void)
PyFrameObjectPyEval_GetFrame (void)
int PyEval_MergeCompilerFlags (PyCompilerFlags *cf)
PyObjectPyEval_CallObjectWithKeywords (PyObject *func, PyObject *arg, PyObject *kw)
const char * PyEval_GetFuncName (PyObject *func)
const char * PyEval_GetFuncDesc (PyObject *func)
static void err_args (PyObject *func, int flags, int nargs)
int _PyEval_SliceIndex (PyObject *v, Py_ssize_t *pi)
static PyObjectcmp_outcome (int op, register PyObject *v, register PyObject *w)

Variables

static _Py_atomic_int eval_breaker = {0}
static int pending_async_exc = 0
struct {
int(* func )(void *)
voidarg
pendingcalls [NPENDINGCALLS]
static volatile int pendingfirst = 0
static volatile int pendinglast = 0
static _Py_atomic_int pendingcalls_to_do = {0}
static int recursion_limit = Py_DEFAULT_RECURSION_LIMIT
int _Py_CheckRecursionLimit = Py_DEFAULT_RECURSION_LIMIT
static int _Py_TracingPossible = 0

Define Documentation

#define BASIC_POP ( )    (*--stack_pointer)
#define BASIC_PUSH (   v)    (*stack_pointer++ = (v))
#define BASIC_STACKADJ (   n)    (stack_pointer += n)
#define C_TRACE (   x,
  call 
)
Value:
if (tstate->use_tracing && tstate->c_profilefunc) { \
    if (call_trace(tstate->c_profilefunc, \
        tstate->c_profileobj, \
        tstate->frame, PyTrace_C_CALL, \
        func)) { \
        x = NULL; \
    } \
    else { \
        x = call; \
        if (tstate->c_profilefunc != NULL) { \
            if (x == NULL) { \
                call_trace_protected(tstate->c_profilefunc, \
                    tstate->c_profileobj, \
                    tstate->frame, PyTrace_C_EXCEPTION, \
                    func); \
                /* XXX should pass (type, value, tb) */ \
            } else { \
                if (call_trace(tstate->c_profilefunc, \
                    tstate->c_profileobj, \
                    tstate->frame, PyTrace_C_RETURN, \
                    func)) { \
                    Py_DECREF(x); \
                    x = NULL; \
                } \
            } \
        } \
    } \
} else { \
    x = call; \
    }

Definition at line 3847 of file ceval.c.

#define CALL_FLAG_KW   2

Definition at line 120 of file ceval.c.

#define CALL_FLAG_VAR   1

Definition at line 119 of file ceval.c.

Value:
"catching classes that do not inherit from "\
                         "BaseException is not allowed"

Definition at line 4275 of file ceval.c.

#define COMPUTE_EVAL_BREAKER ( )
#define DISPATCH ( )    continue
#define EMPTY ( )    (STACK_LEVEL() == 0)
#define EXT_POP (   STACK_POINTER)    (*--(STACK_POINTER))
#define FAST_DISPATCH ( )    goto fast_next_opcode
#define FOURTH ( )    (stack_pointer[-4])
#define GETITEM (   v,
  i 
)    PyTuple_GET_ITEM((PyTupleObject *)(v), (i))
#define GETLOCAL (   i)    (fastlocals[i])
#define GIL_REQUEST   0

Definition at line 223 of file ceval.c.

#define GLOBAL_NAME_ERROR_MSG   "global name '%.200s' is not defined"

Definition at line 145 of file ceval.c.

#define INSTR_OFFSET ( )    ((int)(next_instr - first_instr))
#define JUMPBY (   x)    (next_instr += (x))
#define JUMPTO (   x)    (next_instr = first_instr + (x))
#define NAME_ERROR_MSG   "name '%.200s' is not defined"

Definition at line 143 of file ceval.c.

#define NEXTARG ( )    (next_instr += 2, (next_instr[-1]<<8) + next_instr[-2])
#define NEXTOP ( )    (*next_instr++)
#define NPENDINGCALLS   32

Definition at line 615 of file ceval.c.

#define PCALL (   O)

Definition at line 209 of file ceval.c.

#define PEEK (   n)    (stack_pointer[-(n)])
#define PEEKARG ( )    ((next_instr[2]<<8) + next_instr[1])
#define POP ( )    BASIC_POP()
#define PREDICT (   op)    if (*next_instr == op) goto PRED_##op
#define PREDICTED (   op)    PRED_##op: next_instr++
#define PREDICTED_WITH_ARG (   op)    PRED_##op: oparg = PEEKARG(); next_instr += 3
#define PUSH (   v)    BASIC_PUSH(v)
#define Py_DEFAULT_RECURSION_LIMIT   1000

Definition at line 683 of file ceval.c.

Definition at line 10 of file ceval.c.

#define READ_TIMESTAMP (   var)

Definition at line 23 of file ceval.c.

Value:
{ \
        PyObject *type, *value, *tb; \
        type = tstate->exc_type; \
        value = tstate->exc_value; \
        tb = tstate->exc_traceback; \
        tstate->exc_type = f->f_exc_type; \
        tstate->exc_value = f->f_exc_value; \
        tstate->exc_traceback = f->f_exc_traceback; \
        f->f_exc_type = NULL; \
        f->f_exc_value = NULL; \
        f->f_exc_traceback = NULL; \
        Py_XDECREF(type); \
        Py_XDECREF(value); \
        Py_XDECREF(tb); \
    }
#define SAVE_EXC_STATE ( )
Value:
{ \
        PyObject *type, *value, *traceback; \
        Py_XINCREF(tstate->exc_type); \
        Py_XINCREF(tstate->exc_value); \
        Py_XINCREF(tstate->exc_traceback); \
        type = f->f_exc_type; \
        value = f->f_exc_value; \
        traceback = f->f_exc_traceback; \
        f->f_exc_type = tstate->exc_type; \
        f->f_exc_value = tstate->exc_value; \
        f->f_exc_traceback = tstate->exc_traceback; \
        Py_XDECREF(type); \
        Py_XDECREF(value); \
        Py_XDECREF(traceback); \
    }
#define SECOND ( )    (stack_pointer[-2])
#define SET_FOURTH (   v)    (stack_pointer[-4] = (v))
#define SET_SECOND (   v)    (stack_pointer[-2] = (v))
#define SET_THIRD (   v)    (stack_pointer[-3] = (v))
#define SET_TOP (   v)    (stack_pointer[-1] = (v))
#define SET_VALUE (   n,
  v 
)    (stack_pointer[-(n)] = (v))
#define SETLOCAL (   i,
  value 
)
Value:
do { PyObject *tmp = GETLOCAL(i); \
                                     GETLOCAL(i) = value; \
                                     Py_XDECREF(tmp); } while (0)
#define SIGNAL_ASYNC_EXC ( )
Value:
do { \
        pending_async_exc = 1; \
        _Py_atomic_store_relaxed(&eval_breaker, 1); \
    } while (0)

Definition at line 265 of file ceval.c.

#define SIGNAL_PENDING_CALLS ( )
Value:
do { \
        _Py_atomic_store_relaxed(&pendingcalls_to_do, 1); \
        _Py_atomic_store_relaxed(&eval_breaker, 1); \
    } while (0)

Definition at line 253 of file ceval.c.

#define STACK_LEVEL ( )    ((int)(stack_pointer - f->f_valuestack))
#define STACKADJ (   n)    BASIC_STACKADJ(n)
#define SWAP_EXC_STATE ( )
Value:
{ \
        PyObject *tmp; \
        tmp = tstate->exc_type; \
        tstate->exc_type = f->f_exc_type; \
        f->f_exc_type = tmp; \
        tmp = tstate->exc_value; \
        tstate->exc_value = f->f_exc_value; \
        f->f_exc_value = tmp; \
        tmp = tstate->exc_traceback; \
        tstate->exc_traceback = f->f_exc_traceback; \
        f->f_exc_traceback = tmp; \
    }
#define TARGET (   op)    case op:
#define TARGET_WITH_IMPL (   op,
  impl 
)
Value:
/* silence compiler warnings about `impl` unused */ \
    if (0) goto impl; \
    case op:
#define THIRD ( )    (stack_pointer[-3])
#define TOP ( )    (stack_pointer[-1])
Value:
"free variable '%.200s' referenced before assignment" \
    " in enclosing scope"

Definition at line 149 of file ceval.c.

#define UNBOUNDLOCAL_ERROR_MSG   "local variable '%.200s' referenced before assignment"

Definition at line 147 of file ceval.c.

#define UNSIGNAL_ASYNC_EXC ( )    do { pending_async_exc = 0; COMPUTE_EVAL_BREAKER(); } while (0)

Definition at line 271 of file ceval.c.

Value:
do { \
        _Py_atomic_store_relaxed(&pendingcalls_to_do, 0); \
        COMPUTE_EVAL_BREAKER(); \
    } while (0)

Definition at line 259 of file ceval.c.

#define UNWIND_BLOCK (   b)
Value:
while (STACK_LEVEL() > (b)->b_level) { \
        PyObject *v = POP(); \
        Py_XDECREF(v); \
    }
#define UNWIND_EXCEPT_HANDLER (   b)
Value:
{ \
        PyObject *type, *value, *traceback; \
        assert(STACK_LEVEL() >= (b)->b_level + 3); \
        while (STACK_LEVEL() > (b)->b_level + 3) { \
            value = POP(); \
            Py_XDECREF(value); \
        } \
        type = tstate->exc_type; \
        value = tstate->exc_value; \
        traceback = tstate->exc_traceback; \
        tstate->exc_type = POP(); \
        tstate->exc_value = POP(); \
        tstate->exc_traceback = POP(); \
        Py_XDECREF(type); \
        Py_XDECREF(value); \
        Py_XDECREF(traceback); \
    }
#define USE_COMPUTED_GOTOS   0

Typedef Documentation

typedef PyObject*(* callproc)(PyObject *, PyObject *, PyObject *)

Definition at line 104 of file ceval.c.


Enumeration Type Documentation

enum why_code
Enumerator:
WHY_NOT 
WHY_EXCEPTION 
WHY_RERAISE 
WHY_RETURN 
WHY_BREAK 
WHY_CONTINUE 
WHY_YIELD 
WHY_SILENCED 

Definition at line 741 of file ceval.c.

              {
        WHY_NOT =       0x0001, /* No error */
        WHY_EXCEPTION = 0x0002, /* Exception occurred */
        WHY_RERAISE =   0x0004, /* Exception re-raised by 'finally' */
        WHY_RETURN =    0x0008, /* 'return' statement */
        WHY_BREAK =     0x0010, /* 'break' statement */
        WHY_CONTINUE =  0x0020, /* 'continue' statement */
        WHY_YIELD =     0x0040, /* 'yield' operator */
        WHY_SILENCED =  0x0080  /* Exception silenced by 'with' */
};

Function Documentation

int _Py_CheckRecursiveCall ( char *  where)

Definition at line 707 of file ceval.c.

{
    PyThreadState *tstate = PyThreadState_GET();

#ifdef USE_STACKCHECK
    if (PyOS_CheckStack()) {
        --tstate->recursion_depth;
        PyErr_SetString(PyExc_MemoryError, "Stack overflow");
        return -1;
    }
#endif
    _Py_CheckRecursionLimit = recursion_limit;
    if (tstate->recursion_critical)
        /* Somebody asked that we don't check for recursion. */
        return 0;
    if (tstate->overflowed) {
        if (tstate->recursion_depth > recursion_limit + 50) {
            /* Overflowing while handling an overflow. Give up. */
            Py_FatalError("Cannot recover from stack overflow.");
        }
        return 0;
    }
    if (tstate->recursion_depth > recursion_limit) {
        --tstate->recursion_depth;
        tstate->overflowed = 1;
        PyErr_Format(PyExc_RuntimeError,
                     "maximum recursion depth exceeded%s",
                     where);
        return -1;
    }
    return 0;
}

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PyObject* _PyEval_CallTracing ( PyObject func,
PyObject args 
)

Definition at line 3629 of file ceval.c.

{
    PyFrameObject *frame = PyEval_GetFrame();
    PyThreadState *tstate = frame->f_tstate;
    int save_tracing = tstate->tracing;
    int save_use_tracing = tstate->use_tracing;
    PyObject *result;

    tstate->tracing = 0;
    tstate->use_tracing = ((tstate->c_tracefunc != NULL)
                           || (tstate->c_profilefunc != NULL));
    result = PyObject_Call(func, args, NULL);
    tstate->tracing = save_tracing;
    tstate->use_tracing = save_use_tracing;
    return result;
}

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Definition at line 412 of file ceval.c.

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Definition at line 4255 of file ceval.c.

{
    if (v != NULL) {
        Py_ssize_t x;
        if (PyIndex_Check(v)) {
            x = PyNumber_AsSsize_t(v, NULL);
            if (x == -1 && PyErr_Occurred())
                return 0;
        }
        else {
            PyErr_SetString(PyExc_TypeError,
                            "slice indices must be integers or "
                            "None or have an __index__ method");
            return 0;
        }
        *pi = x;
    }
    return 1;
}

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static void call_exc_trace ( Py_tracefunc  func,
PyObject self,
PyFrameObject f 
) [static]

Definition at line 3565 of file ceval.c.

{
    PyObject *type, *value, *traceback, *arg;
    int err;
    PyErr_Fetch(&type, &value, &traceback);
    if (value == NULL) {
        value = Py_None;
        Py_INCREF(value);
    }
    arg = PyTuple_Pack(3, type, value, traceback);
    if (arg == NULL) {
        PyErr_Restore(type, value, traceback);
        return;
    }
    err = call_trace(func, self, f, PyTrace_EXCEPTION, arg);
    Py_DECREF(arg);
    if (err == 0)
        PyErr_Restore(type, value, traceback);
    else {
        Py_XDECREF(type);
        Py_XDECREF(value);
        Py_XDECREF(traceback);
    }
}

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static PyObject * call_function ( PyObject ***  pp_stack,
int  oparg 
) [static]

Definition at line 3880 of file ceval.c.

{
    int na = oparg & 0xff;
    int nk = (oparg>>8) & 0xff;
    int n = na + 2 * nk;
    PyObject **pfunc = (*pp_stack) - n - 1;
    PyObject *func = *pfunc;
    PyObject *x, *w;

    /* Always dispatch PyCFunction first, because these are
       presumed to be the most frequent callable object.
    */
    if (PyCFunction_Check(func) && nk == 0) {
        int flags = PyCFunction_GET_FLAGS(func);
        PyThreadState *tstate = PyThreadState_GET();

        PCALL(PCALL_CFUNCTION);
        if (flags & (METH_NOARGS | METH_O)) {
            PyCFunction meth = PyCFunction_GET_FUNCTION(func);
            PyObject *self = PyCFunction_GET_SELF(func);
            if (flags & METH_NOARGS && na == 0) {
                C_TRACE(x, (*meth)(self,NULL));
            }
            else if (flags & METH_O && na == 1) {
                PyObject *arg = EXT_POP(*pp_stack);
                C_TRACE(x, (*meth)(self,arg));
                Py_DECREF(arg);
            }
            else {
                err_args(func, flags, na);
                x = NULL;
            }
        }
        else {
            PyObject *callargs;
            callargs = load_args(pp_stack, na);
            READ_TIMESTAMP(*pintr0);
            C_TRACE(x, PyCFunction_Call(func,callargs,NULL));
            READ_TIMESTAMP(*pintr1);
            Py_XDECREF(callargs);
        }
    } else {
        if (PyMethod_Check(func) && PyMethod_GET_SELF(func) != NULL) {
            /* optimize access to bound methods */
            PyObject *self = PyMethod_GET_SELF(func);
            PCALL(PCALL_METHOD);
            PCALL(PCALL_BOUND_METHOD);
            Py_INCREF(self);
            func = PyMethod_GET_FUNCTION(func);
            Py_INCREF(func);
            Py_DECREF(*pfunc);
            *pfunc = self;
            na++;
            n++;
        } else
            Py_INCREF(func);
        READ_TIMESTAMP(*pintr0);
        if (PyFunction_Check(func))
            x = fast_function(func, pp_stack, n, na, nk);
        else
            x = do_call(func, pp_stack, na, nk);
        READ_TIMESTAMP(*pintr1);
        Py_DECREF(func);
    }

    /* Clear the stack of the function object.  Also removes
       the arguments in case they weren't consumed already
       (fast_function() and err_args() leave them on the stack).
     */
    while ((*pp_stack) > pfunc) {
        w = EXT_POP(*pp_stack);
        Py_DECREF(w);
        PCALL(PCALL_POP);
    }
    return x;
}

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static int call_trace ( Py_tracefunc  func,
PyObject obj,
PyFrameObject frame,
int  what,
PyObject arg 
) [static]

Definition at line 3612 of file ceval.c.

{
    register PyThreadState *tstate = frame->f_tstate;
    int result;
    if (tstate->tracing)
        return 0;
    tstate->tracing++;
    tstate->use_tracing = 0;
    result = func(obj, frame, what, arg);
    tstate->use_tracing = ((tstate->c_tracefunc != NULL)
                           || (tstate->c_profilefunc != NULL));
    tstate->tracing--;
    return result;
}

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static int call_trace_protected ( Py_tracefunc  func,
PyObject obj,
PyFrameObject frame,
int  what,
PyObject arg 
) [static]

Definition at line 3591 of file ceval.c.

{
    PyObject *type, *value, *traceback;
    int err;
    PyErr_Fetch(&type, &value, &traceback);
    err = call_trace(func, obj, frame, what, arg);
    if (err == 0)
    {
        PyErr_Restore(type, value, traceback);
        return 0;
    }
    else {
        Py_XDECREF(type);
        Py_XDECREF(value);
        Py_XDECREF(traceback);
        return -1;
    }
}

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static PyObject* cmp_outcome ( int  ,
PyObject ,
PyObject  
) [static]

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static PyObject* cmp_outcome ( int  op,
register PyObject v,
register PyObject w 
) [static]

Definition at line 4279 of file ceval.c.

{
    int res = 0;
    switch (op) {
    case PyCmp_IS:
        res = (v == w);
        break;
    case PyCmp_IS_NOT:
        res = (v != w);
        break;
    case PyCmp_IN:
        res = PySequence_Contains(w, v);
        if (res < 0)
            return NULL;
        break;
    case PyCmp_NOT_IN:
        res = PySequence_Contains(w, v);
        if (res < 0)
            return NULL;
        res = !res;
        break;
    case PyCmp_EXC_MATCH:
        if (PyTuple_Check(w)) {
            Py_ssize_t i, length;
            length = PyTuple_Size(w);
            for (i = 0; i < length; i += 1) {
                PyObject *exc = PyTuple_GET_ITEM(w, i);
                if (!PyExceptionClass_Check(exc)) {
                    PyErr_SetString(PyExc_TypeError,
                                    CANNOT_CATCH_MSG);
                    return NULL;
                }
            }
        }
        else {
            if (!PyExceptionClass_Check(w)) {
                PyErr_SetString(PyExc_TypeError,
                                CANNOT_CATCH_MSG);
                return NULL;
            }
        }
        res = PyErr_GivenExceptionMatches(v, w);
        break;
    default:
        return PyObject_RichCompare(v, w, op);
    }
    v = res ? Py_True : Py_False;
    Py_INCREF(v);
    return v;
}

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static PyObject * do_call ( PyObject func,
PyObject ***  pp_stack,
int  na,
int  nk 
) [static]

Definition at line 4106 of file ceval.c.

{
    PyObject *callargs = NULL;
    PyObject *kwdict = NULL;
    PyObject *result = NULL;

    if (nk > 0) {
        kwdict = update_keyword_args(NULL, nk, pp_stack, func);
        if (kwdict == NULL)
            goto call_fail;
    }
    callargs = load_args(pp_stack, na);
    if (callargs == NULL)
        goto call_fail;
#ifdef CALL_PROFILE
    /* At this point, we have to look at the type of func to
       update the call stats properly.  Do it here so as to avoid
       exposing the call stats machinery outside ceval.c
    */
    if (PyFunction_Check(func))
        PCALL(PCALL_FUNCTION);
    else if (PyMethod_Check(func))
        PCALL(PCALL_METHOD);
    else if (PyType_Check(func))
        PCALL(PCALL_TYPE);
    else if (PyCFunction_Check(func))
        PCALL(PCALL_CFUNCTION);
    else
        PCALL(PCALL_OTHER);
#endif
    if (PyCFunction_Check(func)) {
        PyThreadState *tstate = PyThreadState_GET();
        C_TRACE(result, PyCFunction_Call(func, callargs, kwdict));
    }
    else
        result = PyObject_Call(func, callargs, kwdict);
call_fail:
    Py_XDECREF(callargs);
    Py_XDECREF(kwdict);
    return result;
}

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static enum why_code do_raise ( PyObject exc,
PyObject cause 
) [static]

Definition at line 3383 of file ceval.c.

{
    PyObject *type = NULL, *value = NULL;

    if (exc == NULL) {
        /* Reraise */
        PyThreadState *tstate = PyThreadState_GET();
        PyObject *tb;
        type = tstate->exc_type;
        value = tstate->exc_value;
        tb = tstate->exc_traceback;
        if (type == Py_None) {
            PyErr_SetString(PyExc_RuntimeError,
                            "No active exception to reraise");
            return WHY_EXCEPTION;
            }
        Py_XINCREF(type);
        Py_XINCREF(value);
        Py_XINCREF(tb);
        PyErr_Restore(type, value, tb);
        return WHY_RERAISE;
    }

    /* We support the following forms of raise:
       raise
       raise <instance>
       raise <type> */

    if (PyExceptionClass_Check(exc)) {
        type = exc;
        value = PyObject_CallObject(exc, NULL);
        if (value == NULL)
            goto raise_error;
        if (!PyExceptionInstance_Check(value)) {
            PyErr_Format(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(PyExc_TypeError,
                        "exceptions must derive from BaseException");
        goto raise_error;
    }

    if (cause) {
        PyObject *fixed_cause;
        if (PyExceptionClass_Check(cause)) {
            fixed_cause = PyObject_CallObject(cause, NULL);
            if (fixed_cause == NULL)
                goto raise_error;
            Py_DECREF(cause);
        }
        else if (PyExceptionInstance_Check(cause)) {
            fixed_cause = cause;
        }
        else {
            PyErr_SetString(PyExc_TypeError,
                            "exception causes must derive from "
                            "BaseException");
            goto raise_error;
        }
        PyException_SetCause(value, fixed_cause);
    }

    PyErr_SetObject(type, value);
    /* PyErr_SetObject incref's its arguments */
    Py_XDECREF(value);
    Py_XDECREF(type);
    return WHY_EXCEPTION;

raise_error:
    Py_XDECREF(value);
    Py_XDECREF(type);
    Py_XDECREF(cause);
    return WHY_EXCEPTION;
}

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static void err_args ( PyObject func,
int  flags,
int  nargs 
) [static]

Definition at line 3833 of file ceval.c.

{
    if (flags & METH_NOARGS)
        PyErr_Format(PyExc_TypeError,
                     "%.200s() takes no arguments (%d given)",
                     ((PyCFunctionObject *)func)->m_ml->ml_name,
                     nargs);
    else
        PyErr_Format(PyExc_TypeError,
                     "%.200s() takes exactly one argument (%d given)",
                     ((PyCFunctionObject *)func)->m_ml->ml_name,
                     nargs);
}

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static PyObject * ext_do_call ( PyObject func,
PyObject ***  pp_stack,
int  flags,
int  na,
int  nk 
) [static]

Definition at line 4149 of file ceval.c.

{
    int nstar = 0;
    PyObject *callargs = NULL;
    PyObject *stararg = NULL;
    PyObject *kwdict = NULL;
    PyObject *result = NULL;

    if (flags & CALL_FLAG_KW) {
        kwdict = EXT_POP(*pp_stack);
        if (!PyDict_Check(kwdict)) {
            PyObject *d;
            d = PyDict_New();
            if (d == NULL)
                goto ext_call_fail;
            if (PyDict_Update(d, kwdict) != 0) {
                Py_DECREF(d);
                /* PyDict_Update raises attribute
                 * error (percolated from an attempt
                 * to get 'keys' attribute) instead of
                 * a type error if its second argument
                 * is not a mapping.
                 */
                if (PyErr_ExceptionMatches(PyExc_AttributeError)) {
                    PyErr_Format(PyExc_TypeError,
                                 "%.200s%.200s argument after ** "
                                 "must be a mapping, not %.200s",
                                 PyEval_GetFuncName(func),
                                 PyEval_GetFuncDesc(func),
                                 kwdict->ob_type->tp_name);
                }
                goto ext_call_fail;
            }
            Py_DECREF(kwdict);
            kwdict = d;
        }
    }
    if (flags & CALL_FLAG_VAR) {
        stararg = EXT_POP(*pp_stack);
        if (!PyTuple_Check(stararg)) {
            PyObject *t = NULL;
            t = PySequence_Tuple(stararg);
            if (t == NULL) {
                if (PyErr_ExceptionMatches(PyExc_TypeError)) {
                    PyErr_Format(PyExc_TypeError,
                                 "%.200s%.200s argument after * "
                                 "must be a sequence, not %200s",
                                 PyEval_GetFuncName(func),
                                 PyEval_GetFuncDesc(func),
                                 stararg->ob_type->tp_name);
                }
                goto ext_call_fail;
            }
            Py_DECREF(stararg);
            stararg = t;
        }
        nstar = PyTuple_GET_SIZE(stararg);
    }
    if (nk > 0) {
        kwdict = update_keyword_args(kwdict, nk, pp_stack, func);
        if (kwdict == NULL)
            goto ext_call_fail;
    }
    callargs = update_star_args(na, nstar, stararg, pp_stack);
    if (callargs == NULL)
        goto ext_call_fail;
#ifdef CALL_PROFILE
    /* At this point, we have to look at the type of func to
       update the call stats properly.  Do it here so as to avoid
       exposing the call stats machinery outside ceval.c
    */
    if (PyFunction_Check(func))
        PCALL(PCALL_FUNCTION);
    else if (PyMethod_Check(func))
        PCALL(PCALL_METHOD);
    else if (PyType_Check(func))
        PCALL(PCALL_TYPE);
    else if (PyCFunction_Check(func))
        PCALL(PCALL_CFUNCTION);
    else
        PCALL(PCALL_OTHER);
#endif
    if (PyCFunction_Check(func)) {
        PyThreadState *tstate = PyThreadState_GET();
        C_TRACE(result, PyCFunction_Call(func, callargs, kwdict));
    }
    else
        result = PyObject_Call(func, callargs, kwdict);
ext_call_fail:
    Py_XDECREF(callargs);
    Py_XDECREF(kwdict);
    Py_XDECREF(stararg);
    return result;
}

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static PyObject * fast_function ( PyObject func,
PyObject ***  pp_stack,
int  n,
int  na,
int  nk 
) [static]

Definition at line 3971 of file ceval.c.

{
    PyCodeObject *co = (PyCodeObject *)PyFunction_GET_CODE(func);
    PyObject *globals = PyFunction_GET_GLOBALS(func);
    PyObject *argdefs = PyFunction_GET_DEFAULTS(func);
    PyObject *kwdefs = PyFunction_GET_KW_DEFAULTS(func);
    PyObject **d = NULL;
    int nd = 0;

    PCALL(PCALL_FUNCTION);
    PCALL(PCALL_FAST_FUNCTION);
    if (argdefs == NULL && co->co_argcount == n &&
        co->co_kwonlyargcount == 0 && nk==0 &&
        co->co_flags == (CO_OPTIMIZED | CO_NEWLOCALS | CO_NOFREE)) {
        PyFrameObject *f;
        PyObject *retval = NULL;
        PyThreadState *tstate = PyThreadState_GET();
        PyObject **fastlocals, **stack;
        int i;

        PCALL(PCALL_FASTER_FUNCTION);
        assert(globals != NULL);
        /* XXX Perhaps we should create a specialized
           PyFrame_New() that doesn't take locals, but does
           take builtins without sanity checking them.
        */
        assert(tstate != NULL);
        f = PyFrame_New(tstate, co, globals, NULL);
        if (f == NULL)
            return NULL;

        fastlocals = f->f_localsplus;
        stack = (*pp_stack) - n;

        for (i = 0; i < n; i++) {
            Py_INCREF(*stack);
            fastlocals[i] = *stack++;
        }
        retval = PyEval_EvalFrameEx(f,0);
        ++tstate->recursion_depth;
        Py_DECREF(f);
        --tstate->recursion_depth;
        return retval;
    }
    if (argdefs != NULL) {
        d = &PyTuple_GET_ITEM(argdefs, 0);
        nd = Py_SIZE(argdefs);
    }
    return PyEval_EvalCodeEx((PyObject*)co, globals,
                             (PyObject *)NULL, (*pp_stack)-n, na,
                             (*pp_stack)-2*nk, nk, d, nd, kwdefs,
                             PyFunction_GET_CLOSURE(func));
}

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static void format_exc_check_arg ( PyObject exc,
const char *  format_str,
PyObject obj 
) [static]

Definition at line 4402 of file ceval.c.

{
    const char *obj_str;

    if (!obj)
        return;

    obj_str = _PyUnicode_AsString(obj);
    if (!obj_str)
        return;

    PyErr_Format(exc, format_str, obj_str);
}

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static void format_exc_unbound ( PyCodeObject co,
int  oparg 
) [static]

Definition at line 4417 of file ceval.c.

{
    PyObject *name;
    /* Don't stomp existing exception */
    if (PyErr_Occurred())
        return;
    if (oparg < PyTuple_GET_SIZE(co->co_cellvars)) {
        name = PyTuple_GET_ITEM(co->co_cellvars,
                                oparg);
        format_exc_check_arg(
            PyExc_UnboundLocalError,
            UNBOUNDLOCAL_ERROR_MSG,
            name);
    } else {
        name = PyTuple_GET_ITEM(co->co_freevars, oparg -
                                PyTuple_GET_SIZE(co->co_cellvars));
        format_exc_check_arg(PyExc_NameError,
                             UNBOUNDFREE_ERROR_MSG, name);
    }
}

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static int import_all_from ( PyObject locals,
PyObject v 
) [static]

Definition at line 4343 of file ceval.c.

{
    PyObject *all = PyObject_GetAttrString(v, "__all__");
    PyObject *dict, *name, *value;
    int skip_leading_underscores = 0;
    int pos, err;

    if (all == NULL) {
        if (!PyErr_ExceptionMatches(PyExc_AttributeError))
            return -1; /* Unexpected error */
        PyErr_Clear();
        dict = PyObject_GetAttrString(v, "__dict__");
        if (dict == NULL) {
            if (!PyErr_ExceptionMatches(PyExc_AttributeError))
                return -1;
            PyErr_SetString(PyExc_ImportError,
            "from-import-* object has no __dict__ and no __all__");
            return -1;
        }
        all = PyMapping_Keys(dict);
        Py_DECREF(dict);
        if (all == NULL)
            return -1;
        skip_leading_underscores = 1;
    }

    for (pos = 0, err = 0; ; pos++) {
        name = PySequence_GetItem(all, pos);
        if (name == NULL) {
            if (!PyErr_ExceptionMatches(PyExc_IndexError))
                err = -1;
            else
                PyErr_Clear();
            break;
        }
        if (skip_leading_underscores &&
            PyUnicode_Check(name) &&
            PyUnicode_AS_UNICODE(name)[0] == '_')
        {
            Py_DECREF(name);
            continue;
        }
        value = PyObject_GetAttr(v, name);
        if (value == NULL)
            err = -1;
        else if (PyDict_CheckExact(locals))
            err = PyDict_SetItem(locals, name, value);
        else
            err = PyObject_SetItem(locals, name, value);
        Py_DECREF(name);
        Py_XDECREF(value);
        if (err != 0)
            break;
    }
    Py_DECREF(all);
    return err;
}

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static PyObject * import_from ( PyObject v,
PyObject name 
) [static]

Definition at line 4331 of file ceval.c.

{
    PyObject *x;

    x = PyObject_GetAttr(v, name);
    if (x == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) {
        PyErr_Format(PyExc_ImportError, "cannot import name %S", name);
    }
    return x;
}

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static PyObject * load_args ( PyObject ***  pp_stack,
int  na 
) [static]

Definition at line 4091 of file ceval.c.

{
    PyObject *args = PyTuple_New(na);
    PyObject *w;

    if (args == NULL)
        return NULL;
    while (--na >= 0) {
        w = EXT_POP(*pp_stack);
        PyTuple_SET_ITEM(args, na, w);
    }
    return args;
}

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static int maybe_call_line_trace ( Py_tracefunc  func,
PyObject obj,
PyFrameObject frame,
int instr_lb,
int instr_ub,
int instr_prev 
) [static]

Definition at line 3648 of file ceval.c.

{
    int result = 0;
    int line = frame->f_lineno;

    /* If the last instruction executed isn't in the current
       instruction window, reset the window.
    */
    if (frame->f_lasti < *instr_lb || frame->f_lasti >= *instr_ub) {
        PyAddrPair bounds;
        line = _PyCode_CheckLineNumber(frame->f_code, frame->f_lasti,
                                       &bounds);
        *instr_lb = bounds.ap_lower;
        *instr_ub = bounds.ap_upper;
    }
    /* If the last instruction falls at the start of a line or if
       it represents a jump backwards, update the frame's line
       number and call the trace function. */
    if (frame->f_lasti == *instr_lb || frame->f_lasti < *instr_prev) {
        frame->f_lineno = line;
        result = call_trace(func, obj, frame, PyTrace_LINE, Py_None);
    }
    *instr_prev = frame->f_lasti;
    return result;
}

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int Py_AddPendingCall ( int(*)(void *)  func,
void arg 
)

Definition at line 625 of file ceval.c.

{
    static volatile int busy = 0;
    int i, j;
    /* XXX Begin critical section */
    if (busy)
        return -1;
    busy = 1;
    i = pendinglast;
    j = (i + 1) % NPENDINGCALLS;
    if (j == pendingfirst) {
        busy = 0;
        return -1; /* Queue full */
    }
    pendingcalls[i].func = func;
    pendingcalls[i].arg = arg;
    pendinglast = j;

    SIGNAL_PENDING_CALLS();
    busy = 0;
    /* XXX End critical section */
    return 0;
}

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Definition at line 689 of file ceval.c.

{
    return recursion_limit;
}

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Definition at line 650 of file ceval.c.

{
    static int busy = 0;
    if (busy)
        return 0;
    busy = 1;
    UNSIGNAL_PENDING_CALLS();
    for (;;) {
        int i;
        int (*func)(void *);
        void *arg;
        i = pendingfirst;
        if (i == pendinglast)
            break; /* Queue empty */
        func = pendingcalls[i].func;
        arg = pendingcalls[i].arg;
        pendingfirst = (i + 1) % NPENDINGCALLS;
        if (func(arg) < 0) {
            busy = 0;
            SIGNAL_PENDING_CALLS(); /* We're not done yet */
            return -1;
        }
    }
    busy = 0;
    return 0;
}

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void Py_SetRecursionLimit ( int  new_limit)

Definition at line 695 of file ceval.c.

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Definition at line 3777 of file ceval.c.

{
    PyObject *result;

    if (arg == NULL) {
        arg = PyTuple_New(0);
        if (arg == NULL)
            return NULL;
    }
    else if (!PyTuple_Check(arg)) {
        PyErr_SetString(PyExc_TypeError,
                        "argument list must be a tuple");
        return NULL;
    }
    else
        Py_INCREF(arg);

    if (kw != NULL && !PyDict_Check(kw)) {
        PyErr_SetString(PyExc_TypeError,
                        "keyword list must be a dictionary");
        Py_DECREF(arg);
        return NULL;
    }

    result = PyObject_Call(func, arg, kw);
    Py_DECREF(arg);
    return result;
}

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PyObject* PyEval_EvalCode ( PyObject co,
PyObject globals,
PyObject locals 
)

Definition at line 765 of file ceval.c.

{
    return PyEval_EvalCodeEx(co,
                      globals, locals,
                      (PyObject **)NULL, 0,
                      (PyObject **)NULL, 0,
                      (PyObject **)NULL, 0,
                      NULL, NULL);
}

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PyObject* PyEval_EvalCodeEx ( PyObject _co,
PyObject globals,
PyObject locals,
PyObject **  args,
int  argcount,
PyObject **  kws,
int  kwcount,
PyObject **  defs,
int  defcount,
PyObject kwdefs,
PyObject closure 
)

Definition at line 3102 of file ceval.c.

{
    PyCodeObject* co = (PyCodeObject*)_co;
    register PyFrameObject *f;
    register PyObject *retval = NULL;
    register PyObject **fastlocals, **freevars;
    PyThreadState *tstate = PyThreadState_GET();
    PyObject *x, *u;
    int total_args = co->co_argcount + co->co_kwonlyargcount;

    if (globals == NULL) {
        PyErr_SetString(PyExc_SystemError,
                        "PyEval_EvalCodeEx: NULL globals");
        return NULL;
    }

    assert(tstate != NULL);
    assert(globals != NULL);
    f = PyFrame_New(tstate, co, globals, locals);
    if (f == NULL)
        return NULL;

    fastlocals = f->f_localsplus;
    freevars = f->f_localsplus + co->co_nlocals;

    if (total_args || co->co_flags & (CO_VARARGS | CO_VARKEYWORDS)) {
        int i;
        int n = argcount;
        PyObject *kwdict = NULL;
        if (co->co_flags & CO_VARKEYWORDS) {
            kwdict = PyDict_New();
            if (kwdict == NULL)
                goto fail;
            i = total_args;
            if (co->co_flags & CO_VARARGS)
                i++;
            SETLOCAL(i, kwdict);
        }
        if (argcount > co->co_argcount) {
            if (!(co->co_flags & CO_VARARGS)) {
                PyErr_Format(PyExc_TypeError,
                    "%U() takes %s %d "
                    "positional argument%s (%d given)",
                    co->co_name,
                    defcount ? "at most" : "exactly",
                    co->co_argcount,
                    co->co_argcount == 1 ? "" : "s",
                    argcount + kwcount);
                goto fail;
            }
            n = co->co_argcount;
        }
        for (i = 0; i < n; i++) {
            x = args[i];
            Py_INCREF(x);
            SETLOCAL(i, x);
        }
        if (co->co_flags & CO_VARARGS) {
            u = PyTuple_New(argcount - n);
            if (u == NULL)
                goto fail;
            SETLOCAL(total_args, u);
            for (i = n; i < argcount; i++) {
                x = args[i];
                Py_INCREF(x);
                PyTuple_SET_ITEM(u, i-n, x);
            }
        }
        for (i = 0; i < kwcount; i++) {
            PyObject **co_varnames;
            PyObject *keyword = kws[2*i];
            PyObject *value = kws[2*i + 1];
            int j;
            if (keyword == NULL || !PyUnicode_Check(keyword)) {
                PyErr_Format(PyExc_TypeError,
                    "%U() keywords must be strings",
                    co->co_name);
                goto fail;
            }
            /* Speed hack: do raw pointer compares. As names are
               normally interned this should almost always hit. */
            co_varnames = ((PyTupleObject *)(co->co_varnames))->ob_item;
            for (j = 0; j < total_args; j++) {
                PyObject *nm = co_varnames[j];
                if (nm == keyword)
                    goto kw_found;
            }
            /* Slow fallback, just in case */
            for (j = 0; j < total_args; j++) {
                PyObject *nm = co_varnames[j];
                int cmp = PyObject_RichCompareBool(
                    keyword, nm, Py_EQ);
                if (cmp > 0)
                    goto kw_found;
                else if (cmp < 0)
                    goto fail;
            }
            if (j >= total_args && kwdict == NULL) {
                PyErr_Format(PyExc_TypeError,
                             "%U() got an unexpected "
                             "keyword argument '%S'",
                             co->co_name,
                             keyword);
                goto fail;
            }
            PyDict_SetItem(kwdict, keyword, value);
            continue;
          kw_found:
            if (GETLOCAL(j) != NULL) {
                PyErr_Format(PyExc_TypeError,
                         "%U() got multiple "
                         "values for keyword "
                         "argument '%S'",
                         co->co_name,
                         keyword);
                goto fail;
            }
            Py_INCREF(value);
            SETLOCAL(j, value);
        }
        if (co->co_kwonlyargcount > 0) {
            for (i = co->co_argcount; i < total_args; i++) {
                PyObject *name;
                if (GETLOCAL(i) != NULL)
                    continue;
                name = PyTuple_GET_ITEM(co->co_varnames, i);
                if (kwdefs != NULL) {
                    PyObject *def = PyDict_GetItem(kwdefs, name);
                    if (def) {
                        Py_INCREF(def);
                        SETLOCAL(i, def);
                        continue;
                    }
                }
                PyErr_Format(PyExc_TypeError,
                    "%U() needs keyword-only argument %S",
                    co->co_name, name);
                goto fail;
            }
        }
        if (argcount < co->co_argcount) {
            int m = co->co_argcount - defcount;
            for (i = argcount; i < m; i++) {
                if (GETLOCAL(i) == NULL) {
                    int j, given = 0;
                    for (j = 0; j < co->co_argcount; j++)
                        if (GETLOCAL(j))
                            given++;
                    PyErr_Format(PyExc_TypeError,
                        "%U() takes %s %d "
                        "argument%s "
                        "(%d given)",
                        co->co_name,
                        ((co->co_flags & CO_VARARGS) ||
                         defcount) ? "at least"
                                   : "exactly",
                             m, m == 1 ? "" : "s", given);
                    goto fail;
                }
            }
            if (n > m)
                i = n - m;
            else
                i = 0;
            for (; i < defcount; i++) {
                if (GETLOCAL(m+i) == NULL) {
                    PyObject *def = defs[i];
                    Py_INCREF(def);
                    SETLOCAL(m+i, def);
                }
            }
        }
    }
    else if (argcount > 0 || kwcount > 0) {
        PyErr_Format(PyExc_TypeError,
                     "%U() takes no arguments (%d given)",
                     co->co_name,
                     argcount + kwcount);
        goto fail;
    }
    /* Allocate and initialize storage for cell vars, and copy free
       vars into frame.  This isn't too efficient right now. */
    if (PyTuple_GET_SIZE(co->co_cellvars)) {
        int i, j, nargs, found;
        Py_UNICODE *cellname, *argname;
        PyObject *c;

        nargs = total_args;
        if (co->co_flags & CO_VARARGS)
            nargs++;
        if (co->co_flags & CO_VARKEYWORDS)
            nargs++;

        /* Initialize each cell var, taking into account
           cell vars that are initialized from arguments.

           Should arrange for the compiler to put cellvars
           that are arguments at the beginning of the cellvars
           list so that we can march over it more efficiently?
        */
        for (i = 0; i < PyTuple_GET_SIZE(co->co_cellvars); ++i) {
            cellname = PyUnicode_AS_UNICODE(
                PyTuple_GET_ITEM(co->co_cellvars, i));
            found = 0;
            for (j = 0; j < nargs; j++) {
                argname = PyUnicode_AS_UNICODE(
                    PyTuple_GET_ITEM(co->co_varnames, j));
                if (Py_UNICODE_strcmp(cellname, argname) == 0) {
                    c = PyCell_New(GETLOCAL(j));
                    if (c == NULL)
                        goto fail;
                    GETLOCAL(co->co_nlocals + i) = c;
                    found = 1;
                    break;
                }
            }
            if (found == 0) {
                c = PyCell_New(NULL);
                if (c == NULL)
                    goto fail;
                SETLOCAL(co->co_nlocals + i, c);
            }
        }
    }
    if (PyTuple_GET_SIZE(co->co_freevars)) {
        int i;
        for (i = 0; i < PyTuple_GET_SIZE(co->co_freevars); ++i) {
            PyObject *o = PyTuple_GET_ITEM(closure, i);
            Py_INCREF(o);
            freevars[PyTuple_GET_SIZE(co->co_cellvars) + i] = o;
        }
    }

    if (co->co_flags & CO_GENERATOR) {
        /* Don't need to keep the reference to f_back, it will be set
         * when the generator is resumed. */
        Py_XDECREF(f->f_back);
        f->f_back = NULL;

        PCALL(PCALL_GENERATOR);

        /* Create a new generator that owns the ready to run frame
         * and return that as the value. */
        return PyGen_New(f);
    }

    retval = PyEval_EvalFrameEx(f,0);

fail: /* Jump here from prelude on failure */

    /* decref'ing the frame can cause __del__ methods to get invoked,
       which can call back into Python.  While we're done with the
       current Python frame (f), the associated C stack is still in use,
       so recursion_depth must be boosted for the duration.
    */
    assert(tstate != NULL);
    ++tstate->recursion_depth;
    Py_DECREF(f);
    --tstate->recursion_depth;
    return retval;
}

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Definition at line 779 of file ceval.c.

                                   {
    /* This is for backward compatibility with extension modules that
       used this API; core interpreter code should call
       PyEval_EvalFrameEx() */
    return PyEval_EvalFrameEx(f, 0);
}

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PyObject* PyEval_EvalFrameEx ( PyFrameObject f,
int  throwflag 
)

Definition at line 787 of file ceval.c.

{
#ifdef DXPAIRS
    int lastopcode = 0;
#endif
    register PyObject **stack_pointer;  /* Next free slot in value stack */
    register unsigned char *next_instr;
    register int opcode;        /* Current opcode */
    register int oparg;         /* Current opcode argument, if any */
    register enum why_code why; /* Reason for block stack unwind */
    register int err;           /* Error status -- nonzero if error */
    register PyObject *x;       /* Result object -- NULL if error */
    register PyObject *v;       /* Temporary objects popped off stack */
    register PyObject *w;
    register PyObject *u;
    register PyObject *t;
    register PyObject **fastlocals, **freevars;
    PyObject *retval = NULL;            /* Return value */
    PyThreadState *tstate = PyThreadState_GET();
    PyCodeObject *co;

    /* when tracing we set things up so that

           not (instr_lb <= current_bytecode_offset < instr_ub)

       is true when the line being executed has changed.  The
       initial values are such as to make this false the first
       time it is tested. */
    int instr_ub = -1, instr_lb = 0, instr_prev = -1;

    unsigned char *first_instr;
    PyObject *names;
    PyObject *consts;
#if defined(Py_DEBUG) || defined(LLTRACE)
    /* Make it easier to find out where we are with a debugger */
    char *filename;
#endif

/* Computed GOTOs, or
       the-optimization-commonly-but-improperly-known-as-"threaded code"
   using gcc's labels-as-values extension
   (http://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html).

   The traditional bytecode evaluation loop uses a "switch" statement, which
   decent compilers will optimize as a single indirect branch instruction
   combined with a lookup table of jump addresses. However, since the
   indirect jump instruction is shared by all opcodes, the CPU will have a
   hard time making the right prediction for where to jump next (actually,
   it will be always wrong except in the uncommon case of a sequence of
   several identical opcodes).

   "Threaded code" in contrast, uses an explicit jump table and an explicit
   indirect jump instruction at the end of each opcode. Since the jump
   instruction is at a different address for each opcode, the CPU will make a
   separate prediction for each of these instructions, which is equivalent to
   predicting the second opcode of each opcode pair. These predictions have
   a much better chance to turn out valid, especially in small bytecode loops.

   A mispredicted branch on a modern CPU flushes the whole pipeline and
   can cost several CPU cycles (depending on the pipeline depth),
   and potentially many more instructions (depending on the pipeline width).
   A correctly predicted branch, however, is nearly free.

   At the time of this writing, the "threaded code" version is up to 15-20%
   faster than the normal "switch" version, depending on the compiler and the
   CPU architecture.

   We disable the optimization if DYNAMIC_EXECUTION_PROFILE is defined,
   because it would render the measurements invalid.


   NOTE: care must be taken that the compiler doesn't try to "optimize" the
   indirect jumps by sharing them between all opcodes. Such optimizations
   can be disabled on gcc by using the -fno-gcse flag (or possibly
   -fno-crossjumping).
*/

#ifdef DYNAMIC_EXECUTION_PROFILE
#undef USE_COMPUTED_GOTOS
#define USE_COMPUTED_GOTOS 0
#endif

#ifdef HAVE_COMPUTED_GOTOS
    #ifndef USE_COMPUTED_GOTOS
    #define USE_COMPUTED_GOTOS 1
    #endif
#else
    #if defined(USE_COMPUTED_GOTOS) && USE_COMPUTED_GOTOS
    #error "Computed gotos are not supported on this compiler."
    #endif
    #undef USE_COMPUTED_GOTOS
    #define USE_COMPUTED_GOTOS 0
#endif

#if USE_COMPUTED_GOTOS
/* Import the static jump table */
#include "opcode_targets.h"

/* This macro is used when several opcodes defer to the same implementation
   (e.g. SETUP_LOOP, SETUP_FINALLY) */
#define TARGET_WITH_IMPL(op, impl) \
    TARGET_##op: \
        opcode = op; \
        if (HAS_ARG(op)) \
            oparg = NEXTARG(); \
    case op: \
        goto impl; \

#define TARGET(op) \
    TARGET_##op: \
        opcode = op; \
        if (HAS_ARG(op)) \
            oparg = NEXTARG(); \
    case op:


#define DISPATCH() \
    { \
        if (!_Py_atomic_load_relaxed(&eval_breaker)) {      \
                    FAST_DISPATCH(); \
        } \
        continue; \
    }

#ifdef LLTRACE
#define FAST_DISPATCH() \
    { \
        if (!lltrace && !_Py_TracingPossible) { \
            f->f_lasti = INSTR_OFFSET(); \
            goto *opcode_targets[*next_instr++]; \
        } \
        goto fast_next_opcode; \
    }
#else
#define FAST_DISPATCH() \
    { \
        if (!_Py_TracingPossible) { \
            f->f_lasti = INSTR_OFFSET(); \
            goto *opcode_targets[*next_instr++]; \
        } \
        goto fast_next_opcode; \
    }
#endif

#else
#define TARGET(op) \
    case op:
#define TARGET_WITH_IMPL(op, impl) \
    /* silence compiler warnings about `impl` unused */ \
    if (0) goto impl; \
    case op:
#define DISPATCH() continue
#define FAST_DISPATCH() goto fast_next_opcode
#endif


/* Tuple access macros */

#ifndef Py_DEBUG
#define GETITEM(v, i) PyTuple_GET_ITEM((PyTupleObject *)(v), (i))
#else
#define GETITEM(v, i) PyTuple_GetItem((v), (i))
#endif

#ifdef WITH_TSC
/* Use Pentium timestamp counter to mark certain events:
   inst0 -- beginning of switch statement for opcode dispatch
   inst1 -- end of switch statement (may be skipped)
   loop0 -- the top of the mainloop
   loop1 -- place where control returns again to top of mainloop
            (may be skipped)
   intr1 -- beginning of long interruption
   intr2 -- end of long interruption

   Many opcodes call out to helper C functions.  In some cases, the
   time in those functions should be counted towards the time for the
   opcode, but not in all cases.  For example, a CALL_FUNCTION opcode
   calls another Python function; there's no point in charge all the
   bytecode executed by the called function to the caller.

   It's hard to make a useful judgement statically.  In the presence
   of operator overloading, it's impossible to tell if a call will
   execute new Python code or not.

   It's a case-by-case judgement.  I'll use intr1 for the following
   cases:

   IMPORT_STAR
   IMPORT_FROM
   CALL_FUNCTION (and friends)

 */
    uint64 inst0, inst1, loop0, loop1, intr0 = 0, intr1 = 0;
    int ticked = 0;

    READ_TIMESTAMP(inst0);
    READ_TIMESTAMP(inst1);
    READ_TIMESTAMP(loop0);
    READ_TIMESTAMP(loop1);

    /* shut up the compiler */
    opcode = 0;
#endif

/* Code access macros */

#define INSTR_OFFSET()  ((int)(next_instr - first_instr))
#define NEXTOP()        (*next_instr++)
#define NEXTARG()       (next_instr += 2, (next_instr[-1]<<8) + next_instr[-2])
#define PEEKARG()       ((next_instr[2]<<8) + next_instr[1])
#define JUMPTO(x)       (next_instr = first_instr + (x))
#define JUMPBY(x)       (next_instr += (x))

/* OpCode prediction macros
    Some opcodes tend to come in pairs thus making it possible to
    predict the second code when the first is run.  For example,
    COMPARE_OP is often followed by JUMP_IF_FALSE or JUMP_IF_TRUE.  And,
    those opcodes are often followed by a POP_TOP.

    Verifying the prediction costs a single high-speed test of a register
    variable against a constant.  If the pairing was good, then the
    processor's own internal branch predication has a high likelihood of
    success, resulting in a nearly zero-overhead transition to the
    next opcode.  A successful prediction saves a trip through the eval-loop
    including its two unpredictable branches, the HAS_ARG test and the
    switch-case.  Combined with the processor's internal branch prediction,
    a successful PREDICT has the effect of making the two opcodes run as if
    they were a single new opcode with the bodies combined.

    If collecting opcode statistics, your choices are to either keep the
    predictions turned-on and interpret the results as if some opcodes
    had been combined or turn-off predictions so that the opcode frequency
    counter updates for both opcodes.

    Opcode prediction is disabled with threaded code, since the latter allows
    the CPU to record separate branch prediction information for each
    opcode.

*/

#if defined(DYNAMIC_EXECUTION_PROFILE) || USE_COMPUTED_GOTOS
#define PREDICT(op)             if (0) goto PRED_##op
#define PREDICTED(op)           PRED_##op:
#define PREDICTED_WITH_ARG(op)  PRED_##op:
#else
#define PREDICT(op)             if (*next_instr == op) goto PRED_##op
#define PREDICTED(op)           PRED_##op: next_instr++
#define PREDICTED_WITH_ARG(op)  PRED_##op: oparg = PEEKARG(); next_instr += 3
#endif


/* Stack manipulation macros */

/* The stack can grow at most MAXINT deep, as co_nlocals and
   co_stacksize are ints. */
#define STACK_LEVEL()     ((int)(stack_pointer - f->f_valuestack))
#define EMPTY()           (STACK_LEVEL() == 0)
#define TOP()             (stack_pointer[-1])
#define SECOND()          (stack_pointer[-2])
#define THIRD()           (stack_pointer[-3])
#define FOURTH()          (stack_pointer[-4])
#define PEEK(n)           (stack_pointer[-(n)])
#define SET_TOP(v)        (stack_pointer[-1] = (v))
#define SET_SECOND(v)     (stack_pointer[-2] = (v))
#define SET_THIRD(v)      (stack_pointer[-3] = (v))
#define SET_FOURTH(v)     (stack_pointer[-4] = (v))
#define SET_VALUE(n, v)   (stack_pointer[-(n)] = (v))
#define BASIC_STACKADJ(n) (stack_pointer += n)
#define BASIC_PUSH(v)     (*stack_pointer++ = (v))
#define BASIC_POP()       (*--stack_pointer)

#ifdef LLTRACE
#define PUSH(v)         { (void)(BASIC_PUSH(v), \
                          lltrace && prtrace(TOP(), "push")); \
                          assert(STACK_LEVEL() <= co->co_stacksize); }
#define POP()           ((void)(lltrace && prtrace(TOP(), "pop")), \
                         BASIC_POP())
#define STACKADJ(n)     { (void)(BASIC_STACKADJ(n), \
                          lltrace && prtrace(TOP(), "stackadj")); \
                          assert(STACK_LEVEL() <= co->co_stacksize); }
#define EXT_POP(STACK_POINTER) ((void)(lltrace && \
                                prtrace((STACK_POINTER)[-1], "ext_pop")), \
                                *--(STACK_POINTER))
#else
#define PUSH(v)                BASIC_PUSH(v)
#define POP()                  BASIC_POP()
#define STACKADJ(n)            BASIC_STACKADJ(n)
#define EXT_POP(STACK_POINTER) (*--(STACK_POINTER))
#endif

/* Local variable macros */

#define GETLOCAL(i)     (fastlocals[i])

/* The SETLOCAL() macro must not DECREF the local variable in-place and
   then store the new value; it must copy the old value to a temporary
   value, then store the new value, and then DECREF the temporary value.
   This is because it is possible that during the DECREF the frame is
   accessed by other code (e.g. a __del__ method or gc.collect()) and the
   variable would be pointing to already-freed memory. */
#define SETLOCAL(i, value)      do { PyObject *tmp = GETLOCAL(i); \
                                     GETLOCAL(i) = value; \
                                     Py_XDECREF(tmp); } while (0)


#define UNWIND_BLOCK(b) \
    while (STACK_LEVEL() > (b)->b_level) { \
        PyObject *v = POP(); \
        Py_XDECREF(v); \
    }

#define UNWIND_EXCEPT_HANDLER(b) \
    { \
        PyObject *type, *value, *traceback; \
        assert(STACK_LEVEL() >= (b)->b_level + 3); \
        while (STACK_LEVEL() > (b)->b_level + 3) { \
            value = POP(); \
            Py_XDECREF(value); \
        } \
        type = tstate->exc_type; \
        value = tstate->exc_value; \
        traceback = tstate->exc_traceback; \
        tstate->exc_type = POP(); \
        tstate->exc_value = POP(); \
        tstate->exc_traceback = POP(); \
        Py_XDECREF(type); \
        Py_XDECREF(value); \
        Py_XDECREF(traceback); \
    }

#define SAVE_EXC_STATE() \
    { \
        PyObject *type, *value, *traceback; \
        Py_XINCREF(tstate->exc_type); \
        Py_XINCREF(tstate->exc_value); \
        Py_XINCREF(tstate->exc_traceback); \
        type = f->f_exc_type; \
        value = f->f_exc_value; \
        traceback = f->f_exc_traceback; \
        f->f_exc_type = tstate->exc_type; \
        f->f_exc_value = tstate->exc_value; \
        f->f_exc_traceback = tstate->exc_traceback; \
        Py_XDECREF(type); \
        Py_XDECREF(value); \
        Py_XDECREF(traceback); \
    }

#define SWAP_EXC_STATE() \
    { \
        PyObject *tmp; \
        tmp = tstate->exc_type; \
        tstate->exc_type = f->f_exc_type; \
        f->f_exc_type = tmp; \
        tmp = tstate->exc_value; \
        tstate->exc_value = f->f_exc_value; \
        f->f_exc_value = tmp; \
        tmp = tstate->exc_traceback; \
        tstate->exc_traceback = f->f_exc_traceback; \
        f->f_exc_traceback = tmp; \
    }

#define RESTORE_AND_CLEAR_EXC_STATE() \
    { \
        PyObject *type, *value, *tb; \
        type = tstate->exc_type; \
        value = tstate->exc_value; \
        tb = tstate->exc_traceback; \
        tstate->exc_type = f->f_exc_type; \
        tstate->exc_value = f->f_exc_value; \
        tstate->exc_traceback = f->f_exc_traceback; \
        f->f_exc_type = NULL; \
        f->f_exc_value = NULL; \
        f->f_exc_traceback = NULL; \
        Py_XDECREF(type); \
        Py_XDECREF(value); \
        Py_XDECREF(tb); \
    }

/* Start of code */

    if (f == NULL)
        return NULL;

    /* push frame */
    if (Py_EnterRecursiveCall(""))
        return NULL;

    tstate->frame = f;

    if (tstate->use_tracing) {
        if (tstate->c_tracefunc != NULL) {
            /* tstate->c_tracefunc, if defined, is a
               function that will be called on *every* entry
               to a code block.  Its return value, if not
               None, is a function that will be called at
               the start of each executed line of code.
               (Actually, the function must return itself
               in order to continue tracing.)  The trace
               functions are called with three arguments:
               a pointer to the current frame, a string
               indicating why the function is called, and
               an argument which depends on the situation.
               The global trace function is also called
               whenever an exception is detected. */
            if (call_trace_protected(tstate->c_tracefunc,
                                     tstate->c_traceobj,
                                     f, PyTrace_CALL, Py_None)) {
                /* Trace function raised an error */
                goto exit_eval_frame;
            }
        }
        if (tstate->c_profilefunc != NULL) {
            /* Similar for c_profilefunc, except it needn't
               return itself and isn't called for "line" events */
            if (call_trace_protected(tstate->c_profilefunc,
                                     tstate->c_profileobj,
                                     f, PyTrace_CALL, Py_None)) {
                /* Profile function raised an error */
                goto exit_eval_frame;
            }
        }
    }

    co = f->f_code;
    names = co->co_names;
    consts = co->co_consts;
    fastlocals = f->f_localsplus;
    freevars = f->f_localsplus + co->co_nlocals;
    first_instr = (unsigned char*) PyBytes_AS_STRING(co->co_code);
    /* An explanation is in order for the next line.

       f->f_lasti now refers to the index of the last instruction
       executed.  You might think this was obvious from the name, but
       this wasn't always true before 2.3!  PyFrame_New now sets
       f->f_lasti to -1 (i.e. the index *before* the first instruction)
       and YIELD_VALUE doesn't fiddle with f_lasti any more.  So this
       does work.  Promise.

       When the PREDICT() macros are enabled, some opcode pairs follow in
       direct succession without updating f->f_lasti.  A successful
       prediction effectively links the two codes together as if they
       were a single new opcode; accordingly,f->f_lasti will point to
       the first code in the pair (for instance, GET_ITER followed by
       FOR_ITER is effectively a single opcode and f->f_lasti will point
       at to the beginning of the combined pair.)
    */
    next_instr = first_instr + f->f_lasti + 1;
    stack_pointer = f->f_stacktop;
    assert(stack_pointer != NULL);
    f->f_stacktop = NULL;       /* remains NULL unless yield suspends frame */

    if (co->co_flags & CO_GENERATOR && !throwflag) {
        if (f->f_exc_type != NULL && f->f_exc_type != Py_None) {
            /* We were in an except handler when we left,
               restore the exception state which was put aside
               (see YIELD_VALUE). */
            SWAP_EXC_STATE();
        }
        else {
            SAVE_EXC_STATE();
        }
    }

#ifdef LLTRACE
    lltrace = PyDict_GetItemString(f->f_globals, "__lltrace__") != NULL;
#endif
#if defined(Py_DEBUG) || defined(LLTRACE)
    {
        PyObject *error_type, *error_value, *error_traceback;
        PyErr_Fetch(&error_type, &error_value, &error_traceback);
        filename = _PyUnicode_AsString(co->co_filename);
        if (filename == NULL && tstate->overflowed) {
            /* maximum recursion depth exceeded */
            goto exit_eval_frame;
        }
        PyErr_Restore(error_type, error_value, error_traceback);
    }
#endif

    why = WHY_NOT;
    err = 0;
    x = Py_None;        /* Not a reference, just anything non-NULL */
    w = NULL;

    if (throwflag) { /* support for generator.throw() */
        why = WHY_EXCEPTION;
        goto on_error;
    }

    for (;;) {
#ifdef WITH_TSC
        if (inst1 == 0) {
            /* Almost surely, the opcode executed a break
               or a continue, preventing inst1 from being set
               on the way out of the loop.
            */
            READ_TIMESTAMP(inst1);
            loop1 = inst1;
        }
        dump_tsc(opcode, ticked, inst0, inst1, loop0, loop1,
                 intr0, intr1);
        ticked = 0;
        inst1 = 0;
        intr0 = 0;
        intr1 = 0;
        READ_TIMESTAMP(loop0);
#endif
        assert(stack_pointer >= f->f_valuestack); /* else underflow */
        assert(STACK_LEVEL() <= co->co_stacksize);  /* else overflow */

        /* Do periodic things.  Doing this every time through
           the loop would add too much overhead, so we do it
           only every Nth instruction.  We also do it if
           ``pendingcalls_to_do'' is set, i.e. when an asynchronous
           event needs attention (e.g. a signal handler or
           async I/O handler); see Py_AddPendingCall() and
           Py_MakePendingCalls() above. */

        if (_Py_atomic_load_relaxed(&eval_breaker)) {
            if (*next_instr == SETUP_FINALLY) {
                /* Make the last opcode before
                   a try: finally: block uninterruptible. */
                goto fast_next_opcode;
            }
            tstate->tick_counter++;
#ifdef WITH_TSC
            ticked = 1;
#endif
            if (_Py_atomic_load_relaxed(&pendingcalls_to_do)) {
                if (Py_MakePendingCalls() < 0) {
                    why = WHY_EXCEPTION;
                    goto on_error;
                }
            }
#ifdef WITH_THREAD
            if (_Py_atomic_load_relaxed(&gil_drop_request)) {
                /* Give another thread a chance */
                if (PyThreadState_Swap(NULL) != tstate)
                    Py_FatalError("ceval: tstate mix-up");
                drop_gil(tstate);

                /* Other threads may run now */

                take_gil(tstate);
                if (PyThreadState_Swap(tstate) != NULL)
                    Py_FatalError("ceval: orphan tstate");
            }
#endif
            /* Check for asynchronous exceptions. */
            if (tstate->async_exc != NULL) {
                x = tstate->async_exc;
                tstate->async_exc = NULL;
                UNSIGNAL_ASYNC_EXC();
                PyErr_SetNone(x);
                Py_DECREF(x);
                why = WHY_EXCEPTION;
                goto on_error;
            }
        }

    fast_next_opcode:
        f->f_lasti = INSTR_OFFSET();

        /* line-by-line tracing support */

        if (_Py_TracingPossible &&
            tstate->c_tracefunc != NULL && !tstate->tracing) {
            /* see maybe_call_line_trace
               for expository comments */
            f->f_stacktop = stack_pointer;

            err = maybe_call_line_trace(tstate->c_tracefunc,
                                        tstate->c_traceobj,
                                        f, &instr_lb, &instr_ub,
                                        &instr_prev);
            /* Reload possibly changed frame fields */
            JUMPTO(f->f_lasti);
            if (f->f_stacktop != NULL) {
                stack_pointer = f->f_stacktop;
                f->f_stacktop = NULL;
            }
            if (err) {
                /* trace function raised an exception */
                goto on_error;
            }
        }

        /* Extract opcode and argument */

        opcode = NEXTOP();
        oparg = 0;   /* allows oparg to be stored in a register because
            it doesn't have to be remembered across a full loop */
        if (HAS_ARG(opcode))
            oparg = NEXTARG();
    dispatch_opcode:
#ifdef DYNAMIC_EXECUTION_PROFILE
#ifdef DXPAIRS
        dxpairs[lastopcode][opcode]++;
        lastopcode = opcode;
#endif
        dxp[opcode]++;
#endif

#ifdef LLTRACE
        /* Instruction tracing */

        if (lltrace) {
            if (HAS_ARG(opcode)) {
                printf("%d: %d, %d\n",
                       f->f_lasti, opcode, oparg);
            }
            else {
                printf("%d: %d\n",
                       f->f_lasti, opcode);
            }
        }
#endif

        /* Main switch on opcode */
        READ_TIMESTAMP(inst0);

        switch (opcode) {

        /* BEWARE!
           It is essential that any operation that fails sets either
           x to NULL, err to nonzero, or why to anything but WHY_NOT,
           and that no operation that succeeds does this! */

        /* case STOP_CODE: this is an error! */

        TARGET(NOP)
            FAST_DISPATCH();

        TARGET(LOAD_FAST)
            x = GETLOCAL(oparg);
            if (x != NULL) {
                Py_INCREF(x);
                PUSH(x);
                FAST_DISPATCH();
            }
            format_exc_check_arg(PyExc_UnboundLocalError,
                UNBOUNDLOCAL_ERROR_MSG,
                PyTuple_GetItem(co->co_varnames, oparg));
            break;

        TARGET(LOAD_CONST)
            x = GETITEM(consts, oparg);
            Py_INCREF(x);
            PUSH(x);
            FAST_DISPATCH();

        PREDICTED_WITH_ARG(STORE_FAST);
        TARGET(STORE_FAST)
            v = POP();
            SETLOCAL(oparg, v);
            FAST_DISPATCH();

        TARGET(POP_TOP)
            v = POP();
            Py_DECREF(v);
            FAST_DISPATCH();

        TARGET(ROT_TWO)
            v = TOP();
            w = SECOND();
            SET_TOP(w);
            SET_SECOND(v);
            FAST_DISPATCH();

        TARGET(ROT_THREE)
            v = TOP();
            w = SECOND();
            x = THIRD();
            SET_TOP(w);
            SET_SECOND(x);
            SET_THIRD(v);
            FAST_DISPATCH();

        TARGET(DUP_TOP)
            v = TOP();
            Py_INCREF(v);
            PUSH(v);
            FAST_DISPATCH();

        TARGET(DUP_TOP_TWO)
            x = TOP();
            Py_INCREF(x);
            w = SECOND();
            Py_INCREF(w);
            STACKADJ(2);
            SET_TOP(x);
            SET_SECOND(w);
            FAST_DISPATCH();

        TARGET(UNARY_POSITIVE)
            v = TOP();
            x = PyNumber_Positive(v);
            Py_DECREF(v);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(UNARY_NEGATIVE)
            v = TOP();
            x = PyNumber_Negative(v);
            Py_DECREF(v);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(UNARY_NOT)
            v = TOP();
            err = PyObject_IsTrue(v);
            Py_DECREF(v);
            if (err == 0) {
                Py_INCREF(Py_True);
                SET_TOP(Py_True);
                DISPATCH();
            }
            else if (err > 0) {
                Py_INCREF(Py_False);
                SET_TOP(Py_False);
                err = 0;
                DISPATCH();
            }
            STACKADJ(-1);
            break;

        TARGET(UNARY_INVERT)
            v = TOP();
            x = PyNumber_Invert(v);
            Py_DECREF(v);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_POWER)
            w = POP();
            v = TOP();
            x = PyNumber_Power(v, w, Py_None);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_MULTIPLY)
            w = POP();
            v = TOP();
            x = PyNumber_Multiply(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_TRUE_DIVIDE)
            w = POP();
            v = TOP();
            x = PyNumber_TrueDivide(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_FLOOR_DIVIDE)
            w = POP();
            v = TOP();
            x = PyNumber_FloorDivide(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_MODULO)
            w = POP();
            v = TOP();
            if (PyUnicode_CheckExact(v))
                x = PyUnicode_Format(v, w);
            else
                x = PyNumber_Remainder(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_ADD)
            w = POP();
            v = TOP();
            if (PyUnicode_CheckExact(v) &&
                     PyUnicode_CheckExact(w)) {
                x = unicode_concatenate(v, w, f, next_instr);
                /* unicode_concatenate consumed the ref to v */
                goto skip_decref_vx;
            }
            else {
                x = PyNumber_Add(v, w);
            }
            Py_DECREF(v);
          skip_decref_vx:
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_SUBTRACT)
            w = POP();
            v = TOP();
            x = PyNumber_Subtract(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_SUBSCR)
            w = POP();
            v = TOP();
            x = PyObject_GetItem(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_LSHIFT)
            w = POP();
            v = TOP();
            x = PyNumber_Lshift(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_RSHIFT)
            w = POP();
            v = TOP();
            x = PyNumber_Rshift(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_AND)
            w = POP();
            v = TOP();
            x = PyNumber_And(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_XOR)
            w = POP();
            v = TOP();
            x = PyNumber_Xor(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(BINARY_OR)
            w = POP();
            v = TOP();
            x = PyNumber_Or(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(LIST_APPEND)
            w = POP();
            v = PEEK(oparg);
            err = PyList_Append(v, w);
            Py_DECREF(w);
            if (err == 0) {
                PREDICT(JUMP_ABSOLUTE);
                DISPATCH();
            }
            break;

        TARGET(SET_ADD)
            w = POP();
            v = stack_pointer[-oparg];
            err = PySet_Add(v, w);
            Py_DECREF(w);
            if (err == 0) {
                PREDICT(JUMP_ABSOLUTE);
                DISPATCH();
            }
            break;

        TARGET(INPLACE_POWER)
            w = POP();
            v = TOP();
            x = PyNumber_InPlacePower(v, w, Py_None);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(INPLACE_MULTIPLY)
            w = POP();
            v = TOP();
            x = PyNumber_InPlaceMultiply(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(INPLACE_TRUE_DIVIDE)
            w = POP();
            v = TOP();
            x = PyNumber_InPlaceTrueDivide(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(INPLACE_FLOOR_DIVIDE)
            w = POP();
            v = TOP();
            x = PyNumber_InPlaceFloorDivide(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(INPLACE_MODULO)
            w = POP();
            v = TOP();
            x = PyNumber_InPlaceRemainder(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(INPLACE_ADD)
            w = POP();
            v = TOP();
            if (PyUnicode_CheckExact(v) &&
                     PyUnicode_CheckExact(w)) {
                x = unicode_concatenate(v, w, f, next_instr);
                /* unicode_concatenate consumed the ref to v */
                goto skip_decref_v;
            }
            else {
                x = PyNumber_InPlaceAdd(v, w);
            }
            Py_DECREF(v);
          skip_decref_v:
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(INPLACE_SUBTRACT)
            w = POP();
            v = TOP();
            x = PyNumber_InPlaceSubtract(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(INPLACE_LSHIFT)
            w = POP();
            v = TOP();
            x = PyNumber_InPlaceLshift(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(INPLACE_RSHIFT)
            w = POP();
            v = TOP();
            x = PyNumber_InPlaceRshift(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(INPLACE_AND)
            w = POP();
            v = TOP();
            x = PyNumber_InPlaceAnd(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(INPLACE_XOR)
            w = POP();
            v = TOP();
            x = PyNumber_InPlaceXor(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(INPLACE_OR)
            w = POP();
            v = TOP();
            x = PyNumber_InPlaceOr(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(STORE_SUBSCR)
            w = TOP();
            v = SECOND();
            u = THIRD();
            STACKADJ(-3);
            /* v[w] = u */
            err = PyObject_SetItem(v, w, u);
            Py_DECREF(u);
            Py_DECREF(v);
            Py_DECREF(w);
            if (err == 0) DISPATCH();
            break;

        TARGET(DELETE_SUBSCR)
            w = TOP();
            v = SECOND();
            STACKADJ(-2);
            /* del v[w] */
            err = PyObject_DelItem(v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            if (err == 0) DISPATCH();
            break;

        TARGET(PRINT_EXPR)
            v = POP();
            w = PySys_GetObject("displayhook");
            if (w == NULL) {
                PyErr_SetString(PyExc_RuntimeError,
                                "lost sys.displayhook");
                err = -1;
                x = NULL;
            }
            if (err == 0) {
                x = PyTuple_Pack(1, v);
                if (x == NULL)
                    err = -1;
            }
            if (err == 0) {
                w = PyEval_CallObject(w, x);
                Py_XDECREF(w);
                if (w == NULL)
                    err = -1;
            }
            Py_DECREF(v);
            Py_XDECREF(x);
            break;

#ifdef CASE_TOO_BIG
        default: switch (opcode) {
#endif
        TARGET(RAISE_VARARGS)
            v = w = NULL;
            switch (oparg) {
            case 2:
                v = POP(); /* cause */
            case 1:
                w = POP(); /* exc */
            case 0: /* Fallthrough */
                why = do_raise(w, v);
                break;
            default:
                PyErr_SetString(PyExc_SystemError,
                           "bad RAISE_VARARGS oparg");
                why = WHY_EXCEPTION;
                break;
            }
            break;

        TARGET(STORE_LOCALS)
            x = POP();
            v = f->f_locals;
            Py_XDECREF(v);
            f->f_locals = x;
            DISPATCH();

        TARGET(RETURN_VALUE)
            retval = POP();
            why = WHY_RETURN;
            goto fast_block_end;

        TARGET(YIELD_VALUE)
            retval = POP();
            f->f_stacktop = stack_pointer;
            why = WHY_YIELD;
            goto fast_yield;

        TARGET(POP_EXCEPT)
            {
                PyTryBlock *b = PyFrame_BlockPop(f);
                if (b->b_type != EXCEPT_HANDLER) {
                    PyErr_SetString(PyExc_SystemError,
                        "popped block is not an except handler");
                    why = WHY_EXCEPTION;
                    break;
                }
                UNWIND_EXCEPT_HANDLER(b);
            }
            DISPATCH();

        TARGET(POP_BLOCK)
            {
                PyTryBlock *b = PyFrame_BlockPop(f);
                UNWIND_BLOCK(b);
            }
            DISPATCH();

        PREDICTED(END_FINALLY);
        TARGET(END_FINALLY)
            v = POP();
            if (PyLong_Check(v)) {
                why = (enum why_code) PyLong_AS_LONG(v);
                assert(why != WHY_YIELD);
                if (why == WHY_RETURN ||
                    why == WHY_CONTINUE)
                    retval = POP();
                if (why == WHY_SILENCED) {
                    /* An exception was silenced by 'with', we must
                    manually unwind the EXCEPT_HANDLER block which was
                    created when the exception was caught, otherwise
                    the stack will be in an inconsistent state. */
                    PyTryBlock *b = PyFrame_BlockPop(f);
                    assert(b->b_type == EXCEPT_HANDLER);
                    UNWIND_EXCEPT_HANDLER(b);
                    why = WHY_NOT;
                }
            }
            else if (PyExceptionClass_Check(v)) {
                w = POP();
                u = POP();
                PyErr_Restore(v, w, u);
                why = WHY_RERAISE;
                break;
            }
            else if (v != Py_None) {
                PyErr_SetString(PyExc_SystemError,
                    "'finally' pops bad exception");
                why = WHY_EXCEPTION;
            }
            Py_DECREF(v);
            break;

        TARGET(LOAD_BUILD_CLASS)
            x = PyDict_GetItemString(f->f_builtins,
                                     "__build_class__");
            if (x == NULL) {
                PyErr_SetString(PyExc_ImportError,
                                "__build_class__ not found");
                break;
            }
            Py_INCREF(x);
            PUSH(x);
            break;

        TARGET(STORE_NAME)
            w = GETITEM(names, oparg);
            v = POP();
            if ((x = f->f_locals) != NULL) {
                if (PyDict_CheckExact(x))
                    err = PyDict_SetItem(x, w, v);
                else
                    err = PyObject_SetItem(x, w, v);
                Py_DECREF(v);
                if (err == 0) DISPATCH();
                break;
            }
            PyErr_Format(PyExc_SystemError,
                         "no locals found when storing %R", w);
            break;

        TARGET(DELETE_NAME)
            w = GETITEM(names, oparg);
            if ((x = f->f_locals) != NULL) {
                if ((err = PyObject_DelItem(x, w)) != 0)
                    format_exc_check_arg(PyExc_NameError,
                                         NAME_ERROR_MSG,
                                         w);
                break;
            }
            PyErr_Format(PyExc_SystemError,
                         "no locals when deleting %R", w);
            break;

        PREDICTED_WITH_ARG(UNPACK_SEQUENCE);
        TARGET(UNPACK_SEQUENCE)
            v = POP();
            if (PyTuple_CheckExact(v) &&
                PyTuple_GET_SIZE(v) == oparg) {
                PyObject **items = \
                    ((PyTupleObject *)v)->ob_item;
                while (oparg--) {
                    w = items[oparg];
                    Py_INCREF(w);
                    PUSH(w);
                }
                Py_DECREF(v);
                DISPATCH();
            } else if (PyList_CheckExact(v) &&
                       PyList_GET_SIZE(v) == oparg) {
                PyObject **items = \
                    ((PyListObject *)v)->ob_item;
                while (oparg--) {
                    w = items[oparg];
                    Py_INCREF(w);
                    PUSH(w);
                }
            } else if (unpack_iterable(v, oparg, -1,
                                       stack_pointer + oparg)) {
                STACKADJ(oparg);
            } else {
                /* unpack_iterable() raised an exception */
                why = WHY_EXCEPTION;
            }
            Py_DECREF(v);
            break;

        TARGET(UNPACK_EX)
        {
            int totalargs = 1 + (oparg & 0xFF) + (oparg >> 8);
            v = POP();

            if (unpack_iterable(v, oparg & 0xFF, oparg >> 8,
                                stack_pointer + totalargs)) {
                stack_pointer += totalargs;
            } else {
                why = WHY_EXCEPTION;
            }
            Py_DECREF(v);
            break;
        }

        TARGET(STORE_ATTR)
            w = GETITEM(names, oparg);
            v = TOP();
            u = SECOND();
            STACKADJ(-2);
            err = PyObject_SetAttr(v, w, u); /* v.w = u */
            Py_DECREF(v);
            Py_DECREF(u);
            if (err == 0) DISPATCH();
            break;

        TARGET(DELETE_ATTR)
            w = GETITEM(names, oparg);
            v = POP();
            err = PyObject_SetAttr(v, w, (PyObject *)NULL);
                                            /* del v.w */
            Py_DECREF(v);
            break;

        TARGET(STORE_GLOBAL)
            w = GETITEM(names, oparg);
            v = POP();
            err = PyDict_SetItem(f->f_globals, w, v);
            Py_DECREF(v);
            if (err == 0) DISPATCH();
            break;

        TARGET(DELETE_GLOBAL)
            w = GETITEM(names, oparg);
            if ((err = PyDict_DelItem(f->f_globals, w)) != 0)
                format_exc_check_arg(
                    PyExc_NameError, GLOBAL_NAME_ERROR_MSG, w);
            break;

        TARGET(LOAD_NAME)
            w = GETITEM(names, oparg);
            if ((v = f->f_locals) == NULL) {
                PyErr_Format(PyExc_SystemError,
                             "no locals when loading %R", w);
                why = WHY_EXCEPTION;
                break;
            }
            if (PyDict_CheckExact(v)) {
                x = PyDict_GetItem(v, w);
                Py_XINCREF(x);
            }
            else {
                x = PyObject_GetItem(v, w);
                if (x == NULL && PyErr_Occurred()) {
                    if (!PyErr_ExceptionMatches(
                                    PyExc_KeyError))
                        break;
                    PyErr_Clear();
                }
            }
            if (x == NULL) {
                x = PyDict_GetItem(f->f_globals, w);
                if (x == NULL) {
                    x = PyDict_GetItem(f->f_builtins, w);
                    if (x == NULL) {
                        format_exc_check_arg(
                                    PyExc_NameError,
                                    NAME_ERROR_MSG, w);
                        break;
                    }
                }
                Py_INCREF(x);
            }
            PUSH(x);
            DISPATCH();

        TARGET(LOAD_GLOBAL)
            w = GETITEM(names, oparg);
            if (PyUnicode_CheckExact(w)) {
                /* Inline the PyDict_GetItem() calls.
                   WARNING: this is an extreme speed hack.
                   Do not try this at home. */
                Py_hash_t hash = ((PyUnicodeObject *)w)->hash;
                if (hash != -1) {
                    PyDictObject *d;
                    PyDictEntry *e;
                    d = (PyDictObject *)(f->f_globals);
                    e = d->ma_lookup(d, w, hash);
                    if (e == NULL) {
                        x = NULL;
                        break;
                    }
                    x = e->me_value;
                    if (x != NULL) {
                        Py_INCREF(x);
                        PUSH(x);
                        DISPATCH();
                    }
                    d = (PyDictObject *)(f->f_builtins);
                    e = d->ma_lookup(d, w, hash);
                    if (e == NULL) {
                        x = NULL;
                        break;
                    }
                    x = e->me_value;
                    if (x != NULL) {
                        Py_INCREF(x);
                        PUSH(x);
                        DISPATCH();
                    }
                    goto load_global_error;
                }
            }
            /* This is the un-inlined version of the code above */
            x = PyDict_GetItem(f->f_globals, w);
            if (x == NULL) {
                x = PyDict_GetItem(f->f_builtins, w);
                if (x == NULL) {
                  load_global_error:
                    format_exc_check_arg(
                                PyExc_NameError,
                                GLOBAL_NAME_ERROR_MSG, w);
                    break;
                }
            }
            Py_INCREF(x);
            PUSH(x);
            DISPATCH();

        TARGET(DELETE_FAST)
            x = GETLOCAL(oparg);
            if (x != NULL) {
                SETLOCAL(oparg, NULL);
                DISPATCH();
            }
            format_exc_check_arg(
                PyExc_UnboundLocalError,
                UNBOUNDLOCAL_ERROR_MSG,
                PyTuple_GetItem(co->co_varnames, oparg)
                );
            break;

        TARGET(DELETE_DEREF)
            x = freevars[oparg];
            if (PyCell_GET(x) != NULL) {
                PyCell_Set(x, NULL);
                DISPATCH();
            }
            err = -1;
            format_exc_unbound(co, oparg);
            break;

        TARGET(LOAD_CLOSURE)
            x = freevars[oparg];
            Py_INCREF(x);
            PUSH(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(LOAD_DEREF)
            x = freevars[oparg];
            w = PyCell_Get(x);
            if (w != NULL) {
                PUSH(w);
                DISPATCH();
            }
            err = -1;
            format_exc_unbound(co, oparg);
            break;

        TARGET(STORE_DEREF)
            w = POP();
            x = freevars[oparg];
            PyCell_Set(x, w);
            Py_DECREF(w);
            DISPATCH();

        TARGET(BUILD_TUPLE)
            x = PyTuple_New(oparg);
            if (x != NULL) {
                for (; --oparg >= 0;) {
                    w = POP();
                    PyTuple_SET_ITEM(x, oparg, w);
                }
                PUSH(x);
                DISPATCH();
            }
            break;

        TARGET(BUILD_LIST)
            x =  PyList_New(oparg);
            if (x != NULL) {
                for (; --oparg >= 0;) {
                    w = POP();
                    PyList_SET_ITEM(x, oparg, w);
                }
                PUSH(x);
                DISPATCH();
            }
            break;

        TARGET(BUILD_SET)
            x = PySet_New(NULL);
            if (x != NULL) {
                for (; --oparg >= 0;) {
                    w = POP();
                    if (err == 0)
                        err = PySet_Add(x, w);
                    Py_DECREF(w);
                }
                if (err != 0) {
                    Py_DECREF(x);
                    break;
                }
                PUSH(x);
                DISPATCH();
            }
            break;

        TARGET(BUILD_MAP)
            x = _PyDict_NewPresized((Py_ssize_t)oparg);
            PUSH(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(STORE_MAP)
            w = TOP();     /* key */
            u = SECOND();  /* value */
            v = THIRD();   /* dict */
            STACKADJ(-2);
            assert (PyDict_CheckExact(v));
            err = PyDict_SetItem(v, w, u);  /* v[w] = u */
            Py_DECREF(u);
            Py_DECREF(w);
            if (err == 0) DISPATCH();
            break;

        TARGET(MAP_ADD)
            w = TOP();     /* key */
            u = SECOND();  /* value */
            STACKADJ(-2);
            v = stack_pointer[-oparg];  /* dict */
            assert (PyDict_CheckExact(v));
            err = PyDict_SetItem(v, w, u);  /* v[w] = u */
            Py_DECREF(u);
            Py_DECREF(w);
            if (err == 0) {
                PREDICT(JUMP_ABSOLUTE);
                DISPATCH();
            }
            break;

        TARGET(LOAD_ATTR)
            w = GETITEM(names, oparg);
            v = TOP();
            x = PyObject_GetAttr(v, w);
            Py_DECREF(v);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(COMPARE_OP)
            w = POP();
            v = TOP();
            x = cmp_outcome(oparg, v, w);
            Py_DECREF(v);
            Py_DECREF(w);
            SET_TOP(x);
            if (x == NULL) break;
            PREDICT(POP_JUMP_IF_FALSE);
            PREDICT(POP_JUMP_IF_TRUE);
            DISPATCH();

        TARGET(IMPORT_NAME)
            w = GETITEM(names, oparg);
            x = PyDict_GetItemString(f->f_builtins, "__import__");
            if (x == NULL) {
                PyErr_SetString(PyExc_ImportError,
                                "__import__ not found");
                break;
            }
            Py_INCREF(x);
            v = POP();
            u = TOP();
            if (PyLong_AsLong(u) != -1 || PyErr_Occurred())
                w = PyTuple_Pack(5,
                            w,
                            f->f_globals,
                            f->f_locals == NULL ?
                                  Py_None : f->f_locals,
                            v,
                            u);
            else
                w = PyTuple_Pack(4,
                            w,
                            f->f_globals,
                            f->f_locals == NULL ?
                                  Py_None : f->f_locals,
                            v);
            Py_DECREF(v);
            Py_DECREF(u);
            if (w == NULL) {
                u = POP();
                Py_DECREF(x);
                x = NULL;
                break;
            }
            READ_TIMESTAMP(intr0);
            v = x;
            x = PyEval_CallObject(v, w);
            Py_DECREF(v);
            READ_TIMESTAMP(intr1);
            Py_DECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(IMPORT_STAR)
            v = POP();
            PyFrame_FastToLocals(f);
            if ((x = f->f_locals) == NULL) {
                PyErr_SetString(PyExc_SystemError,
                    "no locals found during 'import *'");
                break;
            }
            READ_TIMESTAMP(intr0);
            err = import_all_from(x, v);
            READ_TIMESTAMP(intr1);
            PyFrame_LocalsToFast(f, 0);
            Py_DECREF(v);
            if (err == 0) DISPATCH();
            break;

        TARGET(IMPORT_FROM)
            w = GETITEM(names, oparg);
            v = TOP();
            READ_TIMESTAMP(intr0);
            x = import_from(v, w);
            READ_TIMESTAMP(intr1);
            PUSH(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(JUMP_FORWARD)
            JUMPBY(oparg);
            FAST_DISPATCH();

        PREDICTED_WITH_ARG(POP_JUMP_IF_FALSE);
        TARGET(POP_JUMP_IF_FALSE)
            w = POP();
            if (w == Py_True) {
                Py_DECREF(w);
                FAST_DISPATCH();
            }
            if (w == Py_False) {
                Py_DECREF(w);
                JUMPTO(oparg);
                FAST_DISPATCH();
            }
            err = PyObject_IsTrue(w);
            Py_DECREF(w);
            if (err > 0)
                err = 0;
            else if (err == 0)
                JUMPTO(oparg);
            else
                break;
            DISPATCH();

        PREDICTED_WITH_ARG(POP_JUMP_IF_TRUE);
        TARGET(POP_JUMP_IF_TRUE)
            w = POP();
            if (w == Py_False) {
                Py_DECREF(w);
                FAST_DISPATCH();
            }
            if (w == Py_True) {
                Py_DECREF(w);
                JUMPTO(oparg);
                FAST_DISPATCH();
            }
            err = PyObject_IsTrue(w);
            Py_DECREF(w);
            if (err > 0) {
                err = 0;
                JUMPTO(oparg);
            }
            else if (err == 0)
                ;
            else
                break;
            DISPATCH();

        TARGET(JUMP_IF_FALSE_OR_POP)
            w = TOP();
            if (w == Py_True) {
                STACKADJ(-1);
                Py_DECREF(w);
                FAST_DISPATCH();
            }
            if (w == Py_False) {
                JUMPTO(oparg);
                FAST_DISPATCH();
            }
            err = PyObject_IsTrue(w);
            if (err > 0) {
                STACKADJ(-1);
                Py_DECREF(w);
                err = 0;
            }
            else if (err == 0)
                JUMPTO(oparg);
            else
                break;
            DISPATCH();

        TARGET(JUMP_IF_TRUE_OR_POP)
            w = TOP();
            if (w == Py_False) {
                STACKADJ(-1);
                Py_DECREF(w);
                FAST_DISPATCH();
            }
            if (w == Py_True) {
                JUMPTO(oparg);
                FAST_DISPATCH();
            }
            err = PyObject_IsTrue(w);
            if (err > 0) {
                err = 0;
                JUMPTO(oparg);
            }
            else if (err == 0) {
                STACKADJ(-1);
                Py_DECREF(w);
            }
            else
                break;
            DISPATCH();

        PREDICTED_WITH_ARG(JUMP_ABSOLUTE);
        TARGET(JUMP_ABSOLUTE)
            JUMPTO(oparg);
#if FAST_LOOPS
            /* Enabling this path speeds-up all while and for-loops by bypassing
               the per-loop checks for signals.  By default, this should be turned-off
               because it prevents detection of a control-break in tight loops like
               "while 1: pass".  Compile with this option turned-on when you need
               the speed-up and do not need break checking inside tight loops (ones
               that contain only instructions ending with FAST_DISPATCH).
            */
            FAST_DISPATCH();
#else
            DISPATCH();
#endif

        TARGET(GET_ITER)
            /* before: [obj]; after [getiter(obj)] */
            v = TOP();
            x = PyObject_GetIter(v);
            Py_DECREF(v);
            if (x != NULL) {
                SET_TOP(x);
                PREDICT(FOR_ITER);
                DISPATCH();
            }
            STACKADJ(-1);
            break;

        PREDICTED_WITH_ARG(FOR_ITER);
        TARGET(FOR_ITER)
            /* before: [iter]; after: [iter, iter()] *or* [] */
            v = TOP();
            x = (*v->ob_type->tp_iternext)(v);
            if (x != NULL) {
                PUSH(x);
                PREDICT(STORE_FAST);
                PREDICT(UNPACK_SEQUENCE);
                DISPATCH();
            }
            if (PyErr_Occurred()) {
                if (!PyErr_ExceptionMatches(
                                PyExc_StopIteration))
                    break;
                PyErr_Clear();
            }
            /* iterator ended normally */
            x = v = POP();
            Py_DECREF(v);
            JUMPBY(oparg);
            DISPATCH();

        TARGET(BREAK_LOOP)
            why = WHY_BREAK;
            goto fast_block_end;

        TARGET(CONTINUE_LOOP)
            retval = PyLong_FromLong(oparg);
            if (!retval) {
                x = NULL;
                break;
            }
            why = WHY_CONTINUE;
            goto fast_block_end;

        TARGET_WITH_IMPL(SETUP_LOOP, _setup_finally)
        TARGET_WITH_IMPL(SETUP_EXCEPT, _setup_finally)
        TARGET(SETUP_FINALLY)
        _setup_finally:
            /* NOTE: If you add any new block-setup opcodes that
               are not try/except/finally handlers, you may need
               to update the PyGen_NeedsFinalizing() function.
               */

            PyFrame_BlockSetup(f, opcode, INSTR_OFFSET() + oparg,
                               STACK_LEVEL());
            DISPATCH();

        TARGET(SETUP_WITH)
        {
            static PyObject *exit, *enter;
            w = TOP();
            x = special_lookup(w, "__exit__", &exit);
            if (!x)
                break;
            SET_TOP(x);
            u = special_lookup(w, "__enter__", &enter);
            Py_DECREF(w);
            if (!u) {
                x = NULL;
                break;
            }
            x = PyObject_CallFunctionObjArgs(u, NULL);
            Py_DECREF(u);
            if (!x)
                break;
            /* Setup the finally block before pushing the result
               of __enter__ on the stack. */
            PyFrame_BlockSetup(f, SETUP_FINALLY, INSTR_OFFSET() + oparg,
                               STACK_LEVEL());

            PUSH(x);
            DISPATCH();
        }

        TARGET(WITH_CLEANUP)
        {
            /* At the top of the stack are 1-3 values indicating
               how/why we entered the finally clause:
               - TOP = None
               - (TOP, SECOND) = (WHY_{RETURN,CONTINUE}), retval
               - TOP = WHY_*; no retval below it
               - (TOP, SECOND, THIRD) = exc_info()
                 (FOURTH, FITH, SIXTH) = previous exception for EXCEPT_HANDLER
               Below them is EXIT, the context.__exit__ bound method.
               In the last case, we must call
                 EXIT(TOP, SECOND, THIRD)
               otherwise we must call
                 EXIT(None, None, None)

               In the first two cases, we remove EXIT from the
               stack, leaving the rest in the same order.  In the
               third case, we shift the bottom 3 values of the
               stack down, and replace the empty spot with NULL.

               In addition, if the stack represents an exception,
               *and* the function call returns a 'true' value, we
               push WHY_SILENCED onto the stack.  END_FINALLY will
               then not re-raise the exception.  (But non-local
               gotos should still be resumed.)
            */

            PyObject *exit_func;
            u = TOP();
            if (u == Py_None) {
                (void)POP();
                exit_func = TOP();
                SET_TOP(u);
                v = w = Py_None;
            }
            else if (PyLong_Check(u)) {
                (void)POP();
                switch(PyLong_AsLong(u)) {
                case WHY_RETURN:
                case WHY_CONTINUE:
                    /* Retval in TOP. */
                    exit_func = SECOND();
                    SET_SECOND(TOP());
                    SET_TOP(u);
                    break;
                default:
                    exit_func = TOP();
                    SET_TOP(u);
                    break;
                }
                u = v = w = Py_None;
            }
            else {
                PyObject *tp, *exc, *tb;
                PyTryBlock *block;
                v = SECOND();
                w = THIRD();
                tp = FOURTH();
                exc = PEEK(5);
                tb = PEEK(6);
                exit_func = PEEK(7);
                SET_VALUE(7, tb);
                SET_VALUE(6, exc);
                SET_VALUE(5, tp);
                /* UNWIND_EXCEPT_HANDLER will pop this off. */
                SET_FOURTH(NULL);
                /* We just shifted the stack down, so we have
                   to tell the except handler block that the
                   values are lower than it expects. */
                block = &f->f_blockstack[f->f_iblock - 1];
                assert(block->b_type == EXCEPT_HANDLER);
                block->b_level--;
            }
            /* XXX Not the fastest way to call it... */
            x = PyObject_CallFunctionObjArgs(exit_func, u, v, w,
                                             NULL);
            Py_DECREF(exit_func);
            if (x == NULL)
                break; /* Go to error exit */

            if (u != Py_None)
                err = PyObject_IsTrue(x);
            else
                err = 0;
            Py_DECREF(x);

            if (err < 0)
                break; /* Go to error exit */
            else if (err > 0) {
                err = 0;
                /* There was an exception and a True return */
                PUSH(PyLong_FromLong((long) WHY_SILENCED));
            }
            PREDICT(END_FINALLY);
            break;
        }

        TARGET(CALL_FUNCTION)
        {
            PyObject **sp;
            PCALL(PCALL_ALL);
            sp = stack_pointer;
#ifdef WITH_TSC
            x = call_function(&sp, oparg, &intr0, &intr1);
#else
            x = call_function(&sp, oparg);
#endif
            stack_pointer = sp;
            PUSH(x);
            if (x != NULL)
                DISPATCH();
            break;
        }

        TARGET_WITH_IMPL(CALL_FUNCTION_VAR, _call_function_var_kw)
        TARGET_WITH_IMPL(CALL_FUNCTION_KW, _call_function_var_kw)
        TARGET(CALL_FUNCTION_VAR_KW)
        _call_function_var_kw:
        {
            int na = oparg & 0xff;
            int nk = (oparg>>8) & 0xff;
            int flags = (opcode - CALL_FUNCTION) & 3;
            int n = na + 2 * nk;
            PyObject **pfunc, *func, **sp;
            PCALL(PCALL_ALL);
            if (flags & CALL_FLAG_VAR)
                n++;
            if (flags & CALL_FLAG_KW)
                n++;
            pfunc = stack_pointer - n - 1;
            func = *pfunc;

            if (PyMethod_Check(func)
                && PyMethod_GET_SELF(func) != NULL) {
                PyObject *self = PyMethod_GET_SELF(func);
                Py_INCREF(self);
                func = PyMethod_GET_FUNCTION(func);
                Py_INCREF(func);
                Py_DECREF(*pfunc);
                *pfunc = self;
                na++;
                n++;
            } else
                Py_INCREF(func);
            sp = stack_pointer;
            READ_TIMESTAMP(intr0);
            x = ext_do_call(func, &sp, flags, na, nk);
            READ_TIMESTAMP(intr1);
            stack_pointer = sp;
            Py_DECREF(func);

            while (stack_pointer > pfunc) {
                w = POP();
                Py_DECREF(w);
            }
            PUSH(x);
            if (x != NULL)
                DISPATCH();
            break;
        }

        TARGET_WITH_IMPL(MAKE_CLOSURE, _make_function)
        TARGET(MAKE_FUNCTION)
        _make_function:
        {
            int posdefaults = oparg & 0xff;
            int kwdefaults = (oparg>>8) & 0xff;
            int num_annotations = (oparg >> 16) & 0x7fff;

            v = POP(); /* code object */
            x = PyFunction_New(v, f->f_globals);
            Py_DECREF(v);

            if (x != NULL && opcode == MAKE_CLOSURE) {
                v = POP();
                if (PyFunction_SetClosure(x, v) != 0) {
                    /* Can't happen unless bytecode is corrupt. */
                    why = WHY_EXCEPTION;
                }
                Py_DECREF(v);
            }

            if (x != NULL && num_annotations > 0) {
                Py_ssize_t name_ix;
                u = POP(); /* names of args with annotations */
                v = PyDict_New();
                if (v == NULL) {
                    Py_DECREF(x);
                    x = NULL;
                    break;
                }
                name_ix = PyTuple_Size(u);
                assert(num_annotations == name_ix+1);
                while (name_ix > 0) {
                    --name_ix;
                    t = PyTuple_GET_ITEM(u, name_ix);
                    w = POP();
                    /* XXX(nnorwitz): check for errors */
                    PyDict_SetItem(v, t, w);
                    Py_DECREF(w);
                }

                if (PyFunction_SetAnnotations(x, v) != 0) {
                    /* Can't happen unless
                       PyFunction_SetAnnotations changes. */
                    why = WHY_EXCEPTION;
                }
                Py_DECREF(v);
                Py_DECREF(u);
            }

            /* XXX Maybe this should be a separate opcode? */
            if (x != NULL && posdefaults > 0) {
                v = PyTuple_New(posdefaults);
                if (v == NULL) {
                    Py_DECREF(x);
                    x = NULL;
                    break;
                }
                while (--posdefaults >= 0) {
                    w = POP();
                    PyTuple_SET_ITEM(v, posdefaults, w);
                }
                if (PyFunction_SetDefaults(x, v) != 0) {
                    /* Can't happen unless
                       PyFunction_SetDefaults changes. */
                    why = WHY_EXCEPTION;
                }
                Py_DECREF(v);
            }
            if (x != NULL && kwdefaults > 0) {
                v = PyDict_New();
                if (v == NULL) {
                    Py_DECREF(x);
                    x = NULL;
                    break;
                }
                while (--kwdefaults >= 0) {
                    w = POP(); /* default value */
                    u = POP(); /* kw only arg name */
                    /* XXX(nnorwitz): check for errors */
                    PyDict_SetItem(v, u, w);
                    Py_DECREF(w);
                    Py_DECREF(u);
                }
                if (PyFunction_SetKwDefaults(x, v) != 0) {
                    /* Can't happen unless
                       PyFunction_SetKwDefaults changes. */
                    why = WHY_EXCEPTION;
                }
                Py_DECREF(v);
            }
            PUSH(x);
            break;
        }

        TARGET(BUILD_SLICE)
            if (oparg == 3)
                w = POP();
            else
                w = NULL;
            v = POP();
            u = TOP();
            x = PySlice_New(u, v, w);
            Py_DECREF(u);
            Py_DECREF(v);
            Py_XDECREF(w);
            SET_TOP(x);
            if (x != NULL) DISPATCH();
            break;

        TARGET(EXTENDED_ARG)
            opcode = NEXTOP();
            oparg = oparg<<16 | NEXTARG();
            goto dispatch_opcode;

#if USE_COMPUTED_GOTOS
        _unknown_opcode:
#endif
        default:
            fprintf(stderr,
                "XXX lineno: %d, opcode: %d\n",
                PyFrame_GetLineNumber(f),
                opcode);
            PyErr_SetString(PyExc_SystemError, "unknown opcode");
            why = WHY_EXCEPTION;
            break;

#ifdef CASE_TOO_BIG
        }
#endif

        } /* switch */

        on_error:

        READ_TIMESTAMP(inst1);

        /* Quickly continue if no error occurred */

        if (why == WHY_NOT) {
            if (err == 0 && x != NULL) {
#ifdef CHECKEXC
                /* This check is expensive! */
                if (PyErr_Occurred())
                    fprintf(stderr,
                        "XXX undetected error\n");
                else {
#endif
                    READ_TIMESTAMP(loop1);
                    continue; /* Normal, fast path */
#ifdef CHECKEXC
                }
#endif
            }
            why = WHY_EXCEPTION;
            x = Py_None;
            err = 0;
        }

        /* Double-check exception status */

        if (why == WHY_EXCEPTION || why == WHY_RERAISE) {
            if (!PyErr_Occurred()) {
                PyErr_SetString(PyExc_SystemError,
                    "error return without exception set");
                why = WHY_EXCEPTION;
            }
        }
#ifdef CHECKEXC
        else {
            /* This check is expensive! */
            if (PyErr_Occurred()) {
                char buf[128];
                sprintf(buf, "Stack unwind with exception "
                    "set and why=%d", why);
                Py_FatalError(buf);
            }
        }
#endif

        /* Log traceback info if this is a real exception */

        if (why == WHY_EXCEPTION) {
            PyTraceBack_Here(f);

            if (tstate->c_tracefunc != NULL)
                call_exc_trace(tstate->c_tracefunc,
                               tstate->c_traceobj, f);
        }

        /* For the rest, treat WHY_RERAISE as WHY_EXCEPTION */

        if (why == WHY_RERAISE)
            why = WHY_EXCEPTION;

        /* Unwind stacks if a (pseudo) exception occurred */

fast_block_end:
        while (why != WHY_NOT && f->f_iblock > 0) {
            /* Peek at the current block. */
            PyTryBlock *b = &f->f_blockstack[f->f_iblock - 1];

            assert(why != WHY_YIELD);
            if (b->b_type == SETUP_LOOP && why == WHY_CONTINUE) {
                why = WHY_NOT;
                JUMPTO(PyLong_AS_LONG(retval));
                Py_DECREF(retval);
                break;
            }
            /* Now we have to pop the block. */
            f->f_iblock--;

            if (b->b_type == EXCEPT_HANDLER) {
                UNWIND_EXCEPT_HANDLER(b);
                continue;
            }
            UNWIND_BLOCK(b);
            if (b->b_type == SETUP_LOOP && why == WHY_BREAK) {
                why = WHY_NOT;
                JUMPTO(b->b_handler);
                break;
            }
            if (why == WHY_EXCEPTION && (b->b_type == SETUP_EXCEPT
                || b->b_type == SETUP_FINALLY)) {
                PyObject *exc, *val, *tb;
                int handler = b->b_handler;
                /* Beware, this invalidates all b->b_* fields */
                PyFrame_BlockSetup(f, EXCEPT_HANDLER, -1, STACK_LEVEL());
                PUSH(tstate->exc_traceback);
                PUSH(tstate->exc_value);
                if (tstate->exc_type != NULL) {
                    PUSH(tstate->exc_type);
                }
                else {
                    Py_INCREF(Py_None);
                    PUSH(Py_None);
                }
                PyErr_Fetch(&exc, &val, &tb);
                /* Make the raw exception data
                   available to the handler,
                   so a program can emulate the
                   Python main loop. */
                PyErr_NormalizeException(
                    &exc, &val, &tb);
                PyException_SetTraceback(val, tb);
                Py_INCREF(exc);
                tstate->exc_type = exc;
                Py_INCREF(val);
                tstate->exc_value = val;
                tstate->exc_traceback = tb;
                if (tb == NULL)
                    tb = Py_None;
                Py_INCREF(tb);
                PUSH(tb);
                PUSH(val);
                PUSH(exc);
                why = WHY_NOT;
                JUMPTO(handler);
                break;
            }
            if (b->b_type == SETUP_FINALLY) {
                if (why & (WHY_RETURN | WHY_CONTINUE))
                    PUSH(retval);
                PUSH(PyLong_FromLong((long)why));
                why = WHY_NOT;
                JUMPTO(b->b_handler);
                break;
            }
        } /* unwind stack */

        /* End the loop if we still have an error (or return) */

        if (why != WHY_NOT)
            break;
        READ_TIMESTAMP(loop1);

    } /* main loop */

    assert(why != WHY_YIELD);
    /* Pop remaining stack entries. */
    while (!EMPTY()) {
        v = POP();
        Py_XDECREF(v);
    }

    if (why != WHY_RETURN)
        retval = NULL;

fast_yield:
    if (co->co_flags & CO_GENERATOR && (why == WHY_YIELD || why == WHY_RETURN)) {
        /* The purpose of this block is to put aside the generator's exception
           state and restore that of the calling frame. If the current
           exception state is from the caller, we clear the exception values
           on the generator frame, so they are not swapped back in latter. The
           origin of the current exception state is determined by checking for
           except handler blocks, which we must be in iff a new exception
           state came into existence in this frame. (An uncaught exception
           would have why == WHY_EXCEPTION, and we wouldn't be here). */
        int i;
        for (i = 0; i < f->f_iblock; i++)
            if (f->f_blockstack[i].b_type == EXCEPT_HANDLER)
                break;
        if (i == f->f_iblock)
            /* We did not create this exception. */
            RESTORE_AND_CLEAR_EXC_STATE()
        else
            SWAP_EXC_STATE()
    }

    if (tstate->use_tracing) {
        if (tstate->c_tracefunc) {
            if (why == WHY_RETURN || why == WHY_YIELD) {
                if (call_trace(tstate->c_tracefunc,
                               tstate->c_traceobj, f,
                               PyTrace_RETURN, retval)) {
                    Py_XDECREF(retval);
                    retval = NULL;
                    why = WHY_EXCEPTION;
                }
            }
            else if (why == WHY_EXCEPTION) {
                call_trace_protected(tstate->c_tracefunc,
                                     tstate->c_traceobj, f,
                                     PyTrace_RETURN, NULL);
            }
        }
        if (tstate->c_profilefunc) {
            if (why == WHY_EXCEPTION)
                call_trace_protected(tstate->c_profilefunc,
                                     tstate->c_profileobj, f,
                                     PyTrace_RETURN, NULL);
            else if (call_trace(tstate->c_profilefunc,
                                tstate->c_profileobj, f,
                                PyTrace_RETURN, retval)) {
                Py_XDECREF(retval);
                retval = NULL;
                why = WHY_EXCEPTION;
            }
        }
    }

    /* pop frame */
exit_eval_frame:
    Py_LeaveRecursiveCall();
    tstate->frame = f->f_back;

    return retval;
}

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Definition at line 3713 of file ceval.c.

{
    PyFrameObject *current_frame = PyEval_GetFrame();
    if (current_frame == NULL)
        return PyThreadState_GET()->interp->builtins;
    else
        return current_frame->f_builtins;
}

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Definition at line 212 of file ceval.c.

{
    Py_INCREF(Py_None);
    return Py_None;
}

Definition at line 3743 of file ceval.c.

{
    PyThreadState *tstate = PyThreadState_GET();
    return _PyThreadState_GetFrame(tstate);
}

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const char* PyEval_GetFuncDesc ( PyObject func)

Definition at line 3820 of file ceval.c.

{
    if (PyMethod_Check(func))
        return "()";
    else if (PyFunction_Check(func))
        return "()";
    else if (PyCFunction_Check(func))
        return "()";
    else
        return " object";
}

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const char* PyEval_GetFuncName ( PyObject func)

Definition at line 3807 of file ceval.c.

{
    if (PyMethod_Check(func))
        return PyEval_GetFuncName(PyMethod_GET_FUNCTION(func));
    else if (PyFunction_Check(func))
        return _PyUnicode_AsString(((PyFunctionObject*)func)->func_name);
    else if (PyCFunction_Check(func))
        return ((PyCFunctionObject*)func)->m_ml->ml_name;
    else
        return func->ob_type->tp_name;
}

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Definition at line 3733 of file ceval.c.

{
    PyFrameObject *current_frame = PyEval_GetFrame();
    if (current_frame == NULL)
        return NULL;
    else
        return current_frame->f_globals;
}

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Definition at line 3723 of file ceval.c.

{
    PyFrameObject *current_frame = PyEval_GetFrame();
    if (current_frame == NULL)
        return NULL;
    PyFrame_FastToLocals(current_frame);
    return current_frame->f_locals;
}

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Definition at line 3750 of file ceval.c.

{
    PyFrameObject *current_frame = PyEval_GetFrame();
    int result = cf->cf_flags != 0;

    if (current_frame != NULL) {
        const int codeflags = current_frame->f_code->co_flags;
        const int compilerflags = codeflags & PyCF_MASK;
        if (compilerflags) {
            result = 1;
            cf->cf_flags |= compilerflags;
        }
#if 0 /* future keyword */
        if (codeflags & CO_GENERATOR_ALLOWED) {
            result = 1;
            cf->cf_flags |= CO_GENERATOR_ALLOWED;
        }
#endif
    }
    return result;
}

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Definition at line 435 of file ceval.c.

{
    if (tstate == NULL)
        Py_FatalError("PyEval_RestoreThread: NULL tstate");
#ifdef WITH_THREAD
    if (gil_created()) {
        int err = errno;
        take_gil(tstate);
        /* _Py_Finalizing is protected by the GIL */
        if (_Py_Finalizing && tstate != _Py_Finalizing) {
            drop_gil(tstate);
            PyThread_exit_thread();
            assert(0);  /* unreachable */
        }
        errno = err;
    }
#endif
    PyThreadState_Swap(tstate);
}

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Definition at line 422 of file ceval.c.

{
    PyThreadState *tstate = PyThreadState_Swap(NULL);
    if (tstate == NULL)
        Py_FatalError("PyEval_SaveThread: NULL tstate");
#ifdef WITH_THREAD
    if (gil_created())
        drop_gil(tstate);
#endif
    return tstate;
}

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Definition at line 3677 of file ceval.c.

{
    PyThreadState *tstate = PyThreadState_GET();
    PyObject *temp = tstate->c_profileobj;
    Py_XINCREF(arg);
    tstate->c_profilefunc = NULL;
    tstate->c_profileobj = NULL;
    /* Must make sure that tracing is not ignored if 'temp' is freed */
    tstate->use_tracing = tstate->c_tracefunc != NULL;
    Py_XDECREF(temp);
    tstate->c_profilefunc = func;
    tstate->c_profileobj = arg;
    /* Flag that tracing or profiling is turned on */
    tstate->use_tracing = (func != NULL) || (tstate->c_tracefunc != NULL);
}

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void PyEval_SetTrace ( Py_tracefunc  func,
PyObject arg 
)

Definition at line 3694 of file ceval.c.

{
    PyThreadState *tstate = PyThreadState_GET();
    PyObject *temp = tstate->c_traceobj;
    _Py_TracingPossible += (func != NULL) - (tstate->c_tracefunc != NULL);
    Py_XINCREF(arg);
    tstate->c_tracefunc = NULL;
    tstate->c_traceobj = NULL;
    /* Must make sure that profiling is not ignored if 'temp' is freed */
    tstate->use_tracing = tstate->c_profilefunc != NULL;
    Py_XDECREF(temp);
    tstate->c_tracefunc = func;
    tstate->c_traceobj = arg;
    /* Flag that tracing or profiling is turned on */
    tstate->use_tracing = ((func != NULL)
                           || (tstate->c_profilefunc != NULL));
}

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static PyObject * special_lookup ( PyObject o,
char *  meth,
PyObject **  cache 
) [static]

Definition at line 3368 of file ceval.c.

{
    PyObject *res;
    res = _PyObject_LookupSpecial(o, meth, cache);
    if (res == NULL && !PyErr_Occurred()) {
        PyErr_SetObject(PyExc_AttributeError, *cache);
        return NULL;
    }
    return res;
}

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static PyObject * unicode_concatenate ( PyObject v,
PyObject w,
PyFrameObject f,
unsigned char *  next_instr 
) [static]

Definition at line 4439 of file ceval.c.

{
    /* This function implements 'variable += expr' when both arguments
       are (Unicode) strings. */
    Py_ssize_t v_len = PyUnicode_GET_SIZE(v);
    Py_ssize_t w_len = PyUnicode_GET_SIZE(w);
    Py_ssize_t new_len = v_len + w_len;
    if (new_len < 0) {
        PyErr_SetString(PyExc_OverflowError,
                        "strings are too large to concat");
        return NULL;
    }

    if (Py_REFCNT(v) == 2) {
        /* In the common case, there are 2 references to the value
         * stored in 'variable' when the += is performed: one on the
         * value stack (in 'v') and one still stored in the
         * 'variable'.  We try to delete the variable now to reduce
         * the refcnt to 1.
         */
        switch (*next_instr) {
        case STORE_FAST:
        {
            int oparg = PEEKARG();
            PyObject **fastlocals = f->f_localsplus;
            if (GETLOCAL(oparg) == v)
                SETLOCAL(oparg, NULL);
            break;
        }
        case STORE_DEREF:
        {
            PyObject **freevars = (f->f_localsplus +
                                   f->f_code->co_nlocals);
            PyObject *c = freevars[PEEKARG()];
            if (PyCell_GET(c) == v)
                PyCell_Set(c, NULL);
            break;
        }
        case STORE_NAME:
        {
            PyObject *names = f->f_code->co_names;
            PyObject *name = GETITEM(names, PEEKARG());
            PyObject *locals = f->f_locals;
            if (PyDict_CheckExact(locals) &&
                PyDict_GetItem(locals, name) == v) {
                if (PyDict_DelItem(locals, name) != 0) {
                    PyErr_Clear();
                }
            }
            break;
        }
        }
    }

    if (Py_REFCNT(v) == 1 && !PyUnicode_CHECK_INTERNED(v)) {
        /* Now we own the last reference to 'v', so we can resize it
         * in-place.
         */
        if (PyUnicode_Resize(&v, new_len) != 0) {
            /* XXX if PyUnicode_Resize() fails, 'v' has been
             * deallocated so it cannot be put back into
             * 'variable'.  The MemoryError is raised when there
             * is no value in 'variable', which might (very
             * remotely) be a cause of incompatibilities.
             */
            return NULL;
        }
        /* copy 'w' into the newly allocated area of 'v' */
        memcpy(PyUnicode_AS_UNICODE(v) + v_len,
               PyUnicode_AS_UNICODE(w), w_len*sizeof(Py_UNICODE));
        return v;
    }
    else {
        /* When in-place resizing is not an option. */
        w = PyUnicode_Concat(v, w);
        Py_DECREF(v);
        return w;
    }
}

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static int unpack_iterable ( PyObject v,
int  argcnt,
int  argcntafter,
PyObject **  sp 
) [static]

Definition at line 3479 of file ceval.c.

{
    int i = 0, j = 0;
    Py_ssize_t ll = 0;
    PyObject *it;  /* iter(v) */
    PyObject *w;
    PyObject *l = NULL; /* variable list */

    assert(v != NULL);

    it = PyObject_GetIter(v);
    if (it == NULL)
        goto Error;

    for (; i < argcnt; i++) {
        w = PyIter_Next(it);
        if (w == NULL) {
            /* Iterator done, via error or exhaustion. */
            if (!PyErr_Occurred()) {
                PyErr_Format(PyExc_ValueError,
                    "need more than %d value%s to unpack",
                    i, i == 1 ? "" : "s");
            }
            goto Error;
        }
        *--sp = w;
    }

    if (argcntafter == -1) {
        /* We better have exhausted the iterator now. */
        w = PyIter_Next(it);
        if (w == NULL) {
            if (PyErr_Occurred())
                goto Error;
            Py_DECREF(it);
            return 1;
        }
        Py_DECREF(w);
        PyErr_Format(PyExc_ValueError, "too many values to unpack "
                     "(expected %d)", argcnt);
        goto Error;
    }

    l = PySequence_List(it);
    if (l == NULL)
        goto Error;
    *--sp = l;
    i++;

    ll = PyList_GET_SIZE(l);
    if (ll < argcntafter) {
        PyErr_Format(PyExc_ValueError, "need more than %zd values to unpack",
                     argcnt + ll);
        goto Error;
    }

    /* Pop the "after-variable" args off the list. */
    for (j = argcntafter; j > 0; j--, i++) {
        *--sp = PyList_GET_ITEM(l, ll - j);
    }
    /* Resize the list. */
    Py_SIZE(l) = ll - argcntafter;
    Py_DECREF(it);
    return 1;

Error:
    for (; i > 0; i--, sp++)
        Py_DECREF(*sp);
    Py_XDECREF(it);
    return 0;
}

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static PyObject * update_keyword_args ( PyObject orig_kwdict,
int  nk,
PyObject ***  pp_stack,
PyObject func 
) [static]

Definition at line 4026 of file ceval.c.

{
    PyObject *kwdict = NULL;
    if (orig_kwdict == NULL)
        kwdict = PyDict_New();
    else {
        kwdict = PyDict_Copy(orig_kwdict);
        Py_DECREF(orig_kwdict);
    }
    if (kwdict == NULL)
        return NULL;
    while (--nk >= 0) {
        int err;
        PyObject *value = EXT_POP(*pp_stack);
        PyObject *key = EXT_POP(*pp_stack);
        if (PyDict_GetItem(kwdict, key) != NULL) {
            PyErr_Format(PyExc_TypeError,
                         "%.200s%s got multiple values "
                         "for keyword argument '%U'",
                         PyEval_GetFuncName(func),
                         PyEval_GetFuncDesc(func),
                         key);
            Py_DECREF(key);
            Py_DECREF(value);
            Py_DECREF(kwdict);
            return NULL;
        }
        err = PyDict_SetItem(kwdict, key, value);
        Py_DECREF(key);
        Py_DECREF(value);
        if (err) {
            Py_DECREF(kwdict);
            return NULL;
        }
    }
    return kwdict;
}

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static PyObject * update_star_args ( int  nstack,
int  nstar,
PyObject stararg,
PyObject ***  pp_stack 
) [static]

Definition at line 4066 of file ceval.c.

{
    PyObject *callargs, *w;

    callargs = PyTuple_New(nstack + nstar);
    if (callargs == NULL) {
        return NULL;
    }
    if (nstar) {
        int i;
        for (i = 0; i < nstar; i++) {
            PyObject *a = PyTuple_GET_ITEM(stararg, i);
            Py_INCREF(a);
            PyTuple_SET_ITEM(callargs, nstack + i, a);
        }
    }
    while (--nstack >= 0) {
        w = EXT_POP(*pp_stack);
        PyTuple_SET_ITEM(callargs, nstack, w);
    }
    return callargs;
}

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Variable Documentation

Definition at line 686 of file ceval.c.

int _Py_TracingPossible = 0 [static]

Definition at line 760 of file ceval.c.

_Py_atomic_int eval_breaker = {0} [static]

Definition at line 404 of file ceval.c.

int pending_async_exc = 0 [static]

Definition at line 405 of file ceval.c.

struct { ... } pendingcalls[NPENDINGCALLS] [static]

Definition at line 622 of file ceval.c.

volatile int pendingfirst = 0 [static]

Definition at line 620 of file ceval.c.

volatile int pendinglast = 0 [static]

Definition at line 621 of file ceval.c.

Definition at line 685 of file ceval.c.