diff options
Diffstat (limited to 'Python/ceval.c')
| -rw-r--r-- | Python/ceval.c | 2253 |
1 files changed, 1205 insertions, 1048 deletions
diff --git a/Python/ceval.c b/Python/ceval.c index d28ae2b..fcc1c24 100644 --- a/Python/ceval.c +++ b/Python/ceval.c @@ -37,7 +37,7 @@ typedef unsigned long long uint64; static void ppc_getcounter(uint64 *v) { - register unsigned long tbu, tb, tbu2; + unsigned long tbu, tb, tbu2; loop: asm volatile ("mftbu %0" : "=r" (tbu) ); @@ -142,8 +142,6 @@ static PyObject * special_lookup(PyObject *, _Py_Identifier *); #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 \ @@ -364,29 +362,28 @@ PyEval_ReleaseThread(PyThreadState *tstate) drop_gil(tstate); } -/* This function is called from PyOS_AfterFork to ensure that newly - created child processes don't hold locks referring to threads which - are not running in the child process. (This could also be done using - pthread_atfork mechanism, at least for the pthreads implementation.) */ +/* This function is called from PyOS_AfterFork to destroy all threads which are + * not running in the child process, and clear internal locks which might be + * held by those threads. (This could also be done using pthread_atfork + * mechanism, at least for the pthreads implementation.) */ void PyEval_ReInitThreads(void) { _Py_IDENTIFIER(_after_fork); PyObject *threading, *result; - PyThreadState *tstate = PyThreadState_GET(); + PyThreadState *current_tstate = PyThreadState_GET(); if (!gil_created()) return; recreate_gil(); pending_lock = PyThread_allocate_lock(); - take_gil(tstate); + take_gil(current_tstate); main_thread = PyThread_get_thread_ident(); /* Update the threading module with the new state. */ - tstate = PyThreadState_GET(); - threading = PyMapping_GetItemString(tstate->interp->modules, + threading = PyMapping_GetItemString(current_tstate->interp->modules, "threading"); if (threading == NULL) { /* threading not imported */ @@ -399,6 +396,9 @@ PyEval_ReInitThreads(void) else Py_DECREF(result); Py_DECREF(threading); + + /* Destroy all threads except the current one */ + _PyThreadState_DeleteExcept(current_tstate); } #else @@ -742,7 +742,6 @@ _Py_CheckRecursiveCall(char *where) enum why_code { 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 */ @@ -753,7 +752,7 @@ enum why_code { static void save_exc_state(PyThreadState *, PyFrameObject *); static void swap_exc_state(PyThreadState *, PyFrameObject *); static void restore_and_clear_exc_state(PyThreadState *, PyFrameObject *); -static enum why_code do_raise(PyObject *, PyObject *); +static int do_raise(PyObject *, PyObject *); static int unpack_iterable(PyObject *, int, int, PyObject **); /* Records whether tracing is on for any thread. Counts the number of @@ -793,18 +792,12 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) #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 **stack_pointer; /* Next free slot in value stack */ + unsigned char *next_instr; + int opcode; /* Current opcode */ + int oparg; /* Current opcode argument, if any */ + enum why_code why; /* Reason for block stack unwind */ + PyObject **fastlocals, **freevars; PyObject *retval = NULL; /* Return value */ PyThreadState *tstate = PyThreadState_GET(); PyCodeObject *co; @@ -1189,6 +1182,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) stack_pointer = f->f_stacktop; assert(stack_pointer != NULL); f->f_stacktop = NULL; /* remains NULL unless yield suspends frame */ + f->f_executing = 1; if (co->co_flags & CO_GENERATOR && !throwflag) { if (f->f_exc_type != NULL && f->f_exc_type != Py_None) { @@ -1206,14 +1200,16 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) #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; - } + if (throwflag) /* support for generator.throw() */ + goto error; + +#ifdef Py_DEBUG + /* PyEval_EvalFrameEx() must not be called with an exception set, + because it may clear it (directly or indirectly) and so the + caller looses its exception */ + assert(!PyErr_Occurred()); +#endif for (;;) { #ifdef WITH_TSC @@ -1235,6 +1231,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) #endif assert(stack_pointer >= f->f_valuestack); /* else underflow */ assert(STACK_LEVEL() <= co->co_stacksize); /* else overflow */ + assert(!PyErr_Occurred()); /* Do periodic things. Doing this every time through the loop would add too much overhead, so we do it @@ -1255,10 +1252,8 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) ticked = 1; #endif if (_Py_atomic_load_relaxed(&pendingcalls_to_do)) { - if (Py_MakePendingCalls() < 0) { - why = WHY_EXCEPTION; - goto on_error; - } + if (Py_MakePendingCalls() < 0) + goto error; } #ifdef WITH_THREAD if (_Py_atomic_load_relaxed(&gil_drop_request)) { @@ -1276,13 +1271,12 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) #endif /* Check for asynchronous exceptions. */ if (tstate->async_exc != NULL) { - x = tstate->async_exc; + PyObject *exc = tstate->async_exc; tstate->async_exc = NULL; UNSIGNAL_ASYNC_EXC(); - PyErr_SetNone(x); - Py_DECREF(x); - why = WHY_EXCEPTION; - goto on_error; + PyErr_SetNone(exc); + Py_DECREF(exc); + goto error; } } @@ -1293,6 +1287,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) if (_Py_TracingPossible && tstate->c_tracefunc != NULL && !tstate->tracing) { + int err; /* see maybe_call_line_trace for expository comments */ f->f_stacktop = stack_pointer; @@ -1307,10 +1302,9 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) stack_pointer = f->f_stacktop; f->f_stacktop = NULL; } - if (err) { + if (err) /* trace function raised an exception */ - goto on_error; - } + goto error; } /* Extract opcode and argument */ @@ -1357,87 +1351,99 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) TARGET(NOP) FAST_DISPATCH(); - TARGET(LOAD_FAST) - x = GETLOCAL(oparg); - if (x != NULL) { - Py_INCREF(x); - PUSH(x); - FAST_DISPATCH(); + TARGET(LOAD_FAST) { + PyObject *value = GETLOCAL(oparg); + if (value == NULL) { + format_exc_check_arg(PyExc_UnboundLocalError, + UNBOUNDLOCAL_ERROR_MSG, + PyTuple_GetItem(co->co_varnames, oparg)); + goto error; } - format_exc_check_arg(PyExc_UnboundLocalError, - UNBOUNDLOCAL_ERROR_MSG, - PyTuple_GetItem(co->co_varnames, oparg)); - break; + Py_INCREF(value); + PUSH(value); + FAST_DISPATCH(); + } - TARGET(LOAD_CONST) - x = GETITEM(consts, oparg); - Py_INCREF(x); - PUSH(x); + TARGET(LOAD_CONST) { + PyObject *value = GETITEM(consts, oparg); + Py_INCREF(value); + PUSH(value); FAST_DISPATCH(); + } PREDICTED_WITH_ARG(STORE_FAST); - TARGET(STORE_FAST) - v = POP(); - SETLOCAL(oparg, v); + TARGET(STORE_FAST) { + PyObject *value = POP(); + SETLOCAL(oparg, value); FAST_DISPATCH(); + } - TARGET(POP_TOP) - v = POP(); - Py_DECREF(v); + TARGET(POP_TOP) { + PyObject *value = POP(); + Py_DECREF(value); FAST_DISPATCH(); + } - TARGET(ROT_TWO) - v = TOP(); - w = SECOND(); - SET_TOP(w); - SET_SECOND(v); + TARGET(ROT_TWO) { + PyObject *top = TOP(); + PyObject *second = SECOND(); + SET_TOP(second); + SET_SECOND(top); FAST_DISPATCH(); + } - TARGET(ROT_THREE) - v = TOP(); - w = SECOND(); - x = THIRD(); - SET_TOP(w); - SET_SECOND(x); - SET_THIRD(v); + TARGET(ROT_THREE) { + PyObject *top = TOP(); + PyObject *second = SECOND(); + PyObject *third = THIRD(); + SET_TOP(second); + SET_SECOND(third); + SET_THIRD(top); FAST_DISPATCH(); + } - TARGET(DUP_TOP) - v = TOP(); - Py_INCREF(v); - PUSH(v); + TARGET(DUP_TOP) { + PyObject *top = TOP(); + Py_INCREF(top); + PUSH(top); FAST_DISPATCH(); + } - TARGET(DUP_TOP_TWO) - x = TOP(); - Py_INCREF(x); - w = SECOND(); - Py_INCREF(w); + TARGET(DUP_TOP_TWO) { + PyObject *top = TOP(); + PyObject *second = SECOND(); + Py_INCREF(top); + Py_INCREF(second); STACKADJ(2); - SET_TOP(x); - SET_SECOND(w); + SET_TOP(top); + SET_SECOND(second); FAST_DISPATCH(); + } - TARGET(UNARY_POSITIVE) - v = TOP(); - x = PyNumber_Positive(v); - Py_DECREF(v); - SET_TOP(x); - if (x != NULL) DISPATCH(); - break; + TARGET(UNARY_POSITIVE) { + PyObject *value = TOP(); + PyObject *res = PyNumber_Positive(value); + Py_DECREF(value); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - TARGET(UNARY_NEGATIVE) - v = TOP(); - x = PyNumber_Negative(v); - Py_DECREF(v); - SET_TOP(x); - if (x != NULL) DISPATCH(); - break; + TARGET(UNARY_NEGATIVE) { + PyObject *value = TOP(); + PyObject *res = PyNumber_Negative(value); + Py_DECREF(value); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - TARGET(UNARY_NOT) - v = TOP(); - err = PyObject_IsTrue(v); - Py_DECREF(v); + TARGET(UNARY_NOT) { + PyObject *value = TOP(); + int err = PyObject_IsTrue(value); + Py_DECREF(value); if (err == 0) { Py_INCREF(Py_True); SET_TOP(Py_True); @@ -1450,416 +1456,460 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) DISPATCH(); } STACKADJ(-1); - break; + goto error; + } - TARGET(UNARY_INVERT) - v = TOP(); - x = PyNumber_Invert(v); - Py_DECREF(v); - SET_TOP(x); - if (x != NULL) DISPATCH(); - break; + TARGET(UNARY_INVERT) { + PyObject *value = TOP(); + PyObject *res = PyNumber_Invert(value); + Py_DECREF(value); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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_POWER) { + PyObject *exp = POP(); + PyObject *base = TOP(); + PyObject *res = PyNumber_Power(base, exp, Py_None); + Py_DECREF(base); + Py_DECREF(exp); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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_MULTIPLY) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_Multiply(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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_TRUE_DIVIDE) { + PyObject *divisor = POP(); + PyObject *dividend = TOP(); + PyObject *quotient = PyNumber_TrueDivide(dividend, divisor); + Py_DECREF(dividend); + Py_DECREF(divisor); + SET_TOP(quotient); + if (quotient == NULL) + goto error; + DISPATCH(); + } - 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_FLOOR_DIVIDE) { + PyObject *divisor = POP(); + PyObject *dividend = TOP(); + PyObject *quotient = PyNumber_FloorDivide(dividend, divisor); + Py_DECREF(dividend); + Py_DECREF(divisor); + SET_TOP(quotient); + if (quotient == NULL) + goto error; + DISPATCH(); + } - 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_MODULO) { + PyObject *divisor = POP(); + PyObject *dividend = TOP(); + PyObject *res = PyUnicode_CheckExact(dividend) ? + PyUnicode_Format(dividend, divisor) : + PyNumber_Remainder(dividend, divisor); + Py_DECREF(divisor); + Py_DECREF(dividend); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - TARGET(BINARY_ADD) - w = POP(); - v = TOP(); - if (PyUnicode_CheckExact(v) && - PyUnicode_CheckExact(w)) { - x = unicode_concatenate(v, w, f, next_instr); + TARGET(BINARY_ADD) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *sum; + if (PyUnicode_CheckExact(left) && + PyUnicode_CheckExact(right)) { + sum = unicode_concatenate(left, right, f, next_instr); /* unicode_concatenate consumed the ref to v */ - goto skip_decref_vx; } else { - x = PyNumber_Add(v, w); + sum = PyNumber_Add(left, right); + Py_DECREF(left); } - 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; + Py_DECREF(right); + SET_TOP(sum); + if (sum == NULL) + goto error; + DISPATCH(); + } - 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_SUBTRACT) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *diff = PyNumber_Subtract(left, right); + Py_DECREF(right); + Py_DECREF(left); + SET_TOP(diff); + if (diff == NULL) + goto error; + DISPATCH(); + } - 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_SUBSCR) { + PyObject *sub = POP(); + PyObject *container = TOP(); + PyObject *res = PyObject_GetItem(container, sub); + Py_DECREF(container); + Py_DECREF(sub); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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_LSHIFT) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_Lshift(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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_RSHIFT) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_Rshift(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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(BINARY_AND) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_And(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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(BINARY_XOR) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_Xor(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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(BINARY_OR) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_Or(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - TARGET(INPLACE_POWER) - w = POP(); - v = TOP(); - x = PyNumber_InPlacePower(v, w, Py_None); + TARGET(LIST_APPEND) { + PyObject *v = POP(); + PyObject *list = PEEK(oparg); + int err; + err = PyList_Append(list, v); Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) DISPATCH(); - break; + if (err != 0) + goto error; + PREDICT(JUMP_ABSOLUTE); + DISPATCH(); + } - TARGET(INPLACE_MULTIPLY) - w = POP(); - v = TOP(); - x = PyNumber_InPlaceMultiply(v, w); + TARGET(SET_ADD) { + PyObject *v = POP(); + PyObject *set = stack_pointer[-oparg]; + int err; + err = PySet_Add(set, v); Py_DECREF(v); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) DISPATCH(); - break; + if (err != 0) + goto error; + PREDICT(JUMP_ABSOLUTE); + DISPATCH(); + } - 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_POWER) { + PyObject *exp = POP(); + PyObject *base = TOP(); + PyObject *res = PyNumber_InPlacePower(base, exp, Py_None); + Py_DECREF(base); + Py_DECREF(exp); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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_MULTIPLY) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_InPlaceMultiply(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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_TRUE_DIVIDE) { + PyObject *divisor = POP(); + PyObject *dividend = TOP(); + PyObject *quotient = PyNumber_InPlaceTrueDivide(dividend, divisor); + Py_DECREF(dividend); + Py_DECREF(divisor); + SET_TOP(quotient); + if (quotient == NULL) + goto error; + DISPATCH(); + } - TARGET(INPLACE_ADD) - w = POP(); - v = TOP(); - if (PyUnicode_CheckExact(v) && - PyUnicode_CheckExact(w)) { - x = unicode_concatenate(v, w, f, next_instr); + TARGET(INPLACE_FLOOR_DIVIDE) { + PyObject *divisor = POP(); + PyObject *dividend = TOP(); + PyObject *quotient = PyNumber_InPlaceFloorDivide(dividend, divisor); + Py_DECREF(dividend); + Py_DECREF(divisor); + SET_TOP(quotient); + if (quotient == NULL) + goto error; + DISPATCH(); + } + + TARGET(INPLACE_MODULO) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *mod = PyNumber_InPlaceRemainder(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(mod); + if (mod == NULL) + goto error; + DISPATCH(); + } + + TARGET(INPLACE_ADD) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *sum; + if (PyUnicode_CheckExact(left) && PyUnicode_CheckExact(right)) { + sum = unicode_concatenate(left, right, f, next_instr); /* unicode_concatenate consumed the ref to v */ - goto skip_decref_v; } else { - x = PyNumber_InPlaceAdd(v, w); + sum = PyNumber_InPlaceAdd(left, right); + Py_DECREF(left); } - Py_DECREF(v); - skip_decref_v: - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) DISPATCH(); - break; + Py_DECREF(right); + SET_TOP(sum); + if (sum == NULL) + goto error; + DISPATCH(); + } - 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_SUBTRACT) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *diff = PyNumber_InPlaceSubtract(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(diff); + if (diff == NULL) + goto error; + DISPATCH(); + } - 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_LSHIFT) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_InPlaceLshift(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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_RSHIFT) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_InPlaceRshift(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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_AND) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_InPlaceAnd(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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_XOR) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_InPlaceXor(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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(INPLACE_OR) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = PyNumber_InPlaceOr(left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - TARGET(STORE_SUBSCR) - w = TOP(); - v = SECOND(); - u = THIRD(); + TARGET(STORE_SUBSCR) { + PyObject *sub = TOP(); + PyObject *container = SECOND(); + PyObject *v = THIRD(); + int err; STACKADJ(-3); /* v[w] = u */ - err = PyObject_SetItem(v, w, u); - Py_DECREF(u); + err = PyObject_SetItem(container, sub, v); Py_DECREF(v); - Py_DECREF(w); - if (err == 0) DISPATCH(); - break; + Py_DECREF(container); + Py_DECREF(sub); + if (err != 0) + goto error; + DISPATCH(); + } - TARGET(DELETE_SUBSCR) - w = TOP(); - v = SECOND(); + TARGET(DELETE_SUBSCR) { + PyObject *sub = TOP(); + PyObject *container = SECOND(); + int err; STACKADJ(-2); /* del v[w] */ - err = PyObject_DelItem(v, w); - Py_DECREF(v); - Py_DECREF(w); - if (err == 0) DISPATCH(); - break; + err = PyObject_DelItem(container, sub); + Py_DECREF(container); + Py_DECREF(sub); + if (err != 0) + goto error; + DISPATCH(); + } - TARGET(PRINT_EXPR) - v = POP(); - w = PySys_GetObject("displayhook"); - if (w == NULL) { + TARGET(PRINT_EXPR) { + PyObject *value = POP(); + PyObject *hook = PySys_GetObject("displayhook"); + PyObject *res; + if (hook == 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; + Py_DECREF(value); + goto error; } - if (err == 0) { - w = PyEval_CallObject(w, x); - Py_XDECREF(w); - if (w == NULL) - err = -1; - } - Py_DECREF(v); - Py_XDECREF(x); - break; + res = PyObject_CallFunctionObjArgs(hook, value, NULL); + Py_DECREF(value); + if (res == NULL) + goto error; + Py_DECREF(res); + DISPATCH(); + } #ifdef CASE_TOO_BIG default: switch (opcode) { #endif - TARGET(RAISE_VARARGS) - v = w = NULL; + TARGET(RAISE_VARARGS) { + PyObject *cause = NULL, *exc = NULL; switch (oparg) { case 2: - v = POP(); /* cause */ + cause = POP(); /* cause */ case 1: - w = POP(); /* exc */ + exc = POP(); /* exc */ case 0: /* Fallthrough */ - why = do_raise(w, v); + if (do_raise(exc, cause)) { + why = WHY_EXCEPTION; + goto fast_block_end; + } 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(); + goto error; + } - TARGET(RETURN_VALUE) + TARGET(RETURN_VALUE) { retval = POP(); why = WHY_RETURN; goto fast_block_end; + } - TARGET(YIELD_FROM) - u = POP(); - x = TOP(); - /* send u to x */ - if (PyGen_CheckExact(x)) { - retval = _PyGen_Send((PyGenObject *)x, u); + TARGET(YIELD_FROM) { + PyObject *v = POP(); + PyObject *reciever = TOP(); + int err; + if (PyGen_CheckExact(reciever)) { + retval = _PyGen_Send((PyGenObject *)reciever, v); } else { _Py_IDENTIFIER(send); - if (u == Py_None) - retval = Py_TYPE(x)->tp_iternext(x); + if (v == Py_None) + retval = Py_TYPE(reciever)->tp_iternext(reciever); else - retval = _PyObject_CallMethodId(x, &PyId_send, "O", u); + retval = _PyObject_CallMethodId(reciever, &PyId_send, "O", v); } - Py_DECREF(u); - if (!retval) { + Py_DECREF(v); + if (retval == NULL) { PyObject *val; - x = POP(); /* Remove iter from stack */ - Py_DECREF(x); err = _PyGen_FetchStopIterationValue(&val); - if (err < 0) { - x = NULL; - break; - } - x = val; - PUSH(x); - continue; + if (err < 0) + goto error; + Py_DECREF(reciever); + SET_TOP(val); + DISPATCH(); } /* x remains on stack, retval is value to be yielded */ f->f_stacktop = stack_pointer; @@ -1867,39 +1917,38 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) /* and repeat... */ f->f_lasti--; goto fast_yield; + } - TARGET(YIELD_VALUE) + 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); + 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"); + goto error; } + UNWIND_EXCEPT_HANDLER(b); DISPATCH(); + } - TARGET(POP_BLOCK) - { - PyTryBlock *b = PyFrame_BlockPop(f); - UNWIND_BLOCK(b); - } + 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); + TARGET(END_FINALLY) { + PyObject *status = POP(); + if (PyLong_Check(status)) { + why = (enum why_code) PyLong_AS_LONG(status); + assert(why != WHY_YIELD && why != WHY_EXCEPTION); if (why == WHY_RETURN || why == WHY_CONTINUE) retval = POP(); @@ -1912,248 +1961,280 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) assert(b->b_type == EXCEPT_HANDLER); UNWIND_EXCEPT_HANDLER(b); why = WHY_NOT; + Py_DECREF(status); + DISPATCH(); } + Py_DECREF(status); + goto fast_block_end; } - else if (PyExceptionClass_Check(v)) { - w = POP(); - u = POP(); - PyErr_Restore(v, w, u); - why = WHY_RERAISE; - break; + else if (PyExceptionClass_Check(status)) { + PyObject *exc = POP(); + PyObject *tb = POP(); + PyErr_Restore(status, exc, tb); + why = WHY_EXCEPTION; + goto fast_block_end; } - else if (v != Py_None) { + else if (status != Py_None) { PyErr_SetString(PyExc_SystemError, "'finally' pops bad exception"); - why = WHY_EXCEPTION; + Py_DECREF(status); + goto error; } - Py_DECREF(v); - break; + Py_DECREF(status); + DISPATCH(); + } - TARGET(LOAD_BUILD_CLASS) - { + TARGET(LOAD_BUILD_CLASS) { _Py_IDENTIFIER(__build_class__); + PyObject *bc; if (PyDict_CheckExact(f->f_builtins)) { - x = _PyDict_GetItemId(f->f_builtins, &PyId___build_class__); - if (x == NULL) { + bc = _PyDict_GetItemId(f->f_builtins, &PyId___build_class__); + if (bc == NULL) { PyErr_SetString(PyExc_NameError, "__build_class__ not found"); - break; + goto error; } - Py_INCREF(x); + Py_INCREF(bc); } else { PyObject *build_class_str = _PyUnicode_FromId(&PyId___build_class__); if (build_class_str == NULL) break; - x = PyObject_GetItem(f->f_builtins, build_class_str); - if (x == NULL) { + bc = PyObject_GetItem(f->f_builtins, build_class_str); + if (bc == NULL) { if (PyErr_ExceptionMatches(PyExc_KeyError)) PyErr_SetString(PyExc_NameError, "__build_class__ not found"); - break; + goto error; } } - PUSH(x); - break; + PUSH(bc); + DISPATCH(); } - 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); + TARGET(STORE_NAME) { + PyObject *name = GETITEM(names, oparg); + PyObject *v = POP(); + PyObject *ns = f->f_locals; + int err; + if (ns == NULL) { + PyErr_Format(PyExc_SystemError, + "no locals found when storing %R", name); Py_DECREF(v); - if (err == 0) DISPATCH(); - break; + goto error; } - PyErr_Format(PyExc_SystemError, - "no locals found when storing %R", w); - break; + if (PyDict_CheckExact(ns)) + err = PyDict_SetItem(ns, name, v); + else + err = PyObject_SetItem(ns, name, v); + Py_DECREF(v); + if (err != 0) + goto error; + DISPATCH(); + } - 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; + TARGET(DELETE_NAME) { + PyObject *name = GETITEM(names, oparg); + PyObject *ns = f->f_locals; + int err; + if (ns == NULL) { + PyErr_Format(PyExc_SystemError, + "no locals when deleting %R", name); + goto error; } - PyErr_Format(PyExc_SystemError, - "no locals when deleting %R", w); - break; + err = PyObject_DelItem(ns, name); + if (err != 0) { + format_exc_check_arg(PyExc_NameError, + NAME_ERROR_MSG, + name); + goto error; + } + DISPATCH(); + } 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; + TARGET(UNPACK_SEQUENCE) { + PyObject *seq = POP(), *item, **items; + if (PyTuple_CheckExact(seq) && + PyTuple_GET_SIZE(seq) == oparg) { + items = ((PyTupleObject *)seq)->ob_item; while (oparg--) { - w = items[oparg]; - Py_INCREF(w); - PUSH(w); + item = items[oparg]; + Py_INCREF(item); + PUSH(item); } - Py_DECREF(v); - DISPATCH(); - } else if (PyList_CheckExact(v) && - PyList_GET_SIZE(v) == oparg) { - PyObject **items = \ - ((PyListObject *)v)->ob_item; + } else if (PyList_CheckExact(seq) && + PyList_GET_SIZE(seq) == oparg) { + items = ((PyListObject *)seq)->ob_item; while (oparg--) { - w = items[oparg]; - Py_INCREF(w); - PUSH(w); + item = items[oparg]; + Py_INCREF(item); + PUSH(item); } - } else if (unpack_iterable(v, oparg, -1, + } else if (unpack_iterable(seq, oparg, -1, stack_pointer + oparg)) { STACKADJ(oparg); } else { /* unpack_iterable() raised an exception */ - why = WHY_EXCEPTION; + Py_DECREF(seq); + goto error; } - Py_DECREF(v); - break; + Py_DECREF(seq); + DISPATCH(); + } - TARGET(UNPACK_EX) - { + TARGET(UNPACK_EX) { int totalargs = 1 + (oparg & 0xFF) + (oparg >> 8); - v = POP(); + PyObject *seq = POP(); - if (unpack_iterable(v, oparg & 0xFF, oparg >> 8, + if (unpack_iterable(seq, oparg & 0xFF, oparg >> 8, stack_pointer + totalargs)) { stack_pointer += totalargs; } else { - why = WHY_EXCEPTION; + Py_DECREF(seq); + goto error; } - Py_DECREF(v); - break; + Py_DECREF(seq); + DISPATCH(); } - TARGET(STORE_ATTR) - w = GETITEM(names, oparg); - v = TOP(); - u = SECOND(); + TARGET(STORE_ATTR) { + PyObject *name = GETITEM(names, oparg); + PyObject *owner = TOP(); + PyObject *v = SECOND(); + int err; STACKADJ(-2); - err = PyObject_SetAttr(v, w, u); /* v.w = u */ + err = PyObject_SetAttr(owner, name, v); Py_DECREF(v); - Py_DECREF(u); - if (err == 0) DISPATCH(); - break; + Py_DECREF(owner); + if (err != 0) + goto error; + DISPATCH(); + } - TARGET(DELETE_ATTR) - w = GETITEM(names, oparg); - v = POP(); - err = PyObject_SetAttr(v, w, (PyObject *)NULL); - /* del v.w */ - Py_DECREF(v); - break; + TARGET(DELETE_ATTR) { + PyObject *name = GETITEM(names, oparg); + PyObject *owner = POP(); + int err; + err = PyObject_SetAttr(owner, name, (PyObject *)NULL); + Py_DECREF(owner); + if (err != 0) + goto error; + DISPATCH(); + } - TARGET(STORE_GLOBAL) - w = GETITEM(names, oparg); - v = POP(); - err = PyDict_SetItem(f->f_globals, w, v); + TARGET(STORE_GLOBAL) { + PyObject *name = GETITEM(names, oparg); + PyObject *v = POP(); + int err; + err = PyDict_SetItem(f->f_globals, name, v); Py_DECREF(v); - if (err == 0) DISPATCH(); - break; + if (err != 0) + goto error; + DISPATCH(); + } - TARGET(DELETE_GLOBAL) - w = GETITEM(names, oparg); - if ((err = PyDict_DelItem(f->f_globals, w)) != 0) + TARGET(DELETE_GLOBAL) { + PyObject *name = GETITEM(names, oparg); + int err; + err = PyDict_DelItem(f->f_globals, name); + if (err != 0) { format_exc_check_arg( - PyExc_NameError, GLOBAL_NAME_ERROR_MSG, w); - break; + PyExc_NameError, NAME_ERROR_MSG, name); + goto error; + } + DISPATCH(); + } - TARGET(LOAD_NAME) - w = GETITEM(names, oparg); - if ((v = f->f_locals) == NULL) { + TARGET(LOAD_NAME) { + PyObject *name = GETITEM(names, oparg); + PyObject *locals = f->f_locals; + PyObject *v; + if (locals == NULL) { PyErr_Format(PyExc_SystemError, - "no locals when loading %R", w); - why = WHY_EXCEPTION; - break; + "no locals when loading %R", name); + goto error; } - if (PyDict_CheckExact(v)) { - x = PyDict_GetItem(v, w); - Py_XINCREF(x); + if (PyDict_CheckExact(locals)) { + v = PyDict_GetItem(locals, name); + Py_XINCREF(v); } else { - x = PyObject_GetItem(v, w); - if (x == NULL && PyErr_Occurred()) { - if (!PyErr_ExceptionMatches( - PyExc_KeyError)) - break; + v = PyObject_GetItem(locals, name); + if (v == NULL && PyErr_Occurred()) { + if (!PyErr_ExceptionMatches(PyExc_KeyError)) + goto error; PyErr_Clear(); } } - if (x == NULL) { - x = PyDict_GetItem(f->f_globals, w); - Py_XINCREF(x); - if (x == NULL) { + if (v == NULL) { + v = PyDict_GetItem(f->f_globals, name); + Py_XINCREF(v); + if (v == NULL) { if (PyDict_CheckExact(f->f_builtins)) { - x = PyDict_GetItem(f->f_builtins, w); - if (x == NULL) { + v = PyDict_GetItem(f->f_builtins, name); + if (v == NULL) { format_exc_check_arg( PyExc_NameError, - NAME_ERROR_MSG, w); - break; + NAME_ERROR_MSG, name); + goto error; } - Py_INCREF(x); + Py_INCREF(v); } else { - x = PyObject_GetItem(f->f_builtins, w); - if (x == NULL) { + v = PyObject_GetItem(f->f_builtins, name); + if (v == NULL) { if (PyErr_ExceptionMatches(PyExc_KeyError)) format_exc_check_arg( PyExc_NameError, - NAME_ERROR_MSG, w); - break; + NAME_ERROR_MSG, name); + goto error; } } } } - PUSH(x); + PUSH(v); DISPATCH(); + } - TARGET(LOAD_GLOBAL) - w = GETITEM(names, oparg); + TARGET(LOAD_GLOBAL) { + PyObject *name = GETITEM(names, oparg); + PyObject *v; if (PyDict_CheckExact(f->f_globals) && PyDict_CheckExact(f->f_builtins)) { - x = _PyDict_LoadGlobal((PyDictObject *)f->f_globals, + v = _PyDict_LoadGlobal((PyDictObject *)f->f_globals, (PyDictObject *)f->f_builtins, - w); - if (x == NULL) { + name); + if (v == NULL) { if (!PyErr_Occurred()) format_exc_check_arg(PyExc_NameError, - GLOBAL_NAME_ERROR_MSG, w); - break; + NAME_ERROR_MSG, name); + goto error; } - Py_INCREF(x); + Py_INCREF(v); } else { /* Slow-path if globals or builtins is not a dict */ - x = PyObject_GetItem(f->f_globals, w); - if (x == NULL) { - x = PyObject_GetItem(f->f_builtins, w); - if (x == NULL) { + v = PyObject_GetItem(f->f_globals, name); + if (v == NULL) { + v = PyObject_GetItem(f->f_builtins, name); + if (v == NULL) { if (PyErr_ExceptionMatches(PyExc_KeyError)) format_exc_check_arg( PyExc_NameError, - GLOBAL_NAME_ERROR_MSG, w); - break; + NAME_ERROR_MSG, name); + goto error; } } } - PUSH(x); + PUSH(v); DISPATCH(); + } - TARGET(DELETE_FAST) - x = GETLOCAL(oparg); - if (x != NULL) { + TARGET(DELETE_FAST) { + PyObject *v = GETLOCAL(oparg); + if (v != NULL) { SETLOCAL(oparg, NULL); DISPATCH(); } @@ -2162,252 +2243,310 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) UNBOUNDLOCAL_ERROR_MSG, PyTuple_GetItem(co->co_varnames, oparg) ); - break; + goto error; + } - TARGET(DELETE_DEREF) - x = freevars[oparg]; - if (PyCell_GET(x) != NULL) { - PyCell_Set(x, NULL); + TARGET(DELETE_DEREF) { + PyObject *cell = freevars[oparg]; + if (PyCell_GET(cell) != NULL) { + PyCell_Set(cell, NULL); DISPATCH(); } - err = -1; format_exc_unbound(co, oparg); - break; + goto error; + } - TARGET(LOAD_CLOSURE) - x = freevars[oparg]; - Py_INCREF(x); - PUSH(x); - if (x != NULL) DISPATCH(); - break; + TARGET(LOAD_CLOSURE) { + PyObject *cell = freevars[oparg]; + Py_INCREF(cell); + PUSH(cell); + DISPATCH(); + } - TARGET(LOAD_DEREF) - x = freevars[oparg]; - w = PyCell_Get(x); - if (w != NULL) { - PUSH(w); - DISPATCH(); + TARGET(LOAD_CLASSDEREF) { + PyObject *name, *value, *locals = f->f_locals; + Py_ssize_t idx; + assert(locals); + assert(oparg >= PyTuple_GET_SIZE(co->co_cellvars)); + idx = oparg - PyTuple_GET_SIZE(co->co_cellvars); + assert(idx >= 0 && idx < PyTuple_GET_SIZE(co->co_freevars)); + name = PyTuple_GET_ITEM(co->co_freevars, idx); + if (PyDict_CheckExact(locals)) { + value = PyDict_GetItem(locals, name); + Py_XINCREF(value); } - err = -1; - format_exc_unbound(co, oparg); - break; + else { + value = PyObject_GetItem(locals, name); + if (value == NULL && PyErr_Occurred()) { + if (!PyErr_ExceptionMatches(PyExc_KeyError)) + goto error; + PyErr_Clear(); + } + } + if (!value) { + PyObject *cell = freevars[oparg]; + value = PyCell_GET(cell); + if (value == NULL) { + format_exc_unbound(co, oparg); + goto error; + } + Py_INCREF(value); + } + PUSH(value); + DISPATCH(); + } - TARGET(STORE_DEREF) - w = POP(); - x = freevars[oparg]; - PyCell_Set(x, w); - Py_DECREF(w); + TARGET(LOAD_DEREF) { + PyObject *cell = freevars[oparg]; + PyObject *value = PyCell_GET(cell); + if (value == NULL) { + format_exc_unbound(co, oparg); + goto error; + } + Py_INCREF(value); + PUSH(value); 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(); + TARGET(STORE_DEREF) { + PyObject *v = POP(); + PyObject *cell = freevars[oparg]; + PyCell_Set(cell, v); + Py_DECREF(v); + DISPATCH(); + } + + TARGET(BUILD_TUPLE) { + PyObject *tup = PyTuple_New(oparg); + if (tup == NULL) + goto error; + while (--oparg >= 0) { + PyObject *item = POP(); + PyTuple_SET_ITEM(tup, oparg, item); } - break; + PUSH(tup); + DISPATCH(); + } - TARGET(BUILD_LIST) - x = PyList_New(oparg); - if (x != NULL) { - for (; --oparg >= 0;) { - w = POP(); - PyList_SET_ITEM(x, oparg, w); - } - PUSH(x); - DISPATCH(); + TARGET(BUILD_LIST) { + PyObject *list = PyList_New(oparg); + if (list == NULL) + goto error; + while (--oparg >= 0) { + PyObject *item = POP(); + PyList_SET_ITEM(list, oparg, item); } - break; + PUSH(list); + DISPATCH(); + } - 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(); + TARGET(BUILD_SET) { + PyObject *set = PySet_New(NULL); + int err = 0; + if (set == NULL) + goto error; + while (--oparg >= 0) { + PyObject *item = POP(); + if (err == 0) + err = PySet_Add(set, item); + Py_DECREF(item); } - break; + if (err != 0) { + Py_DECREF(set); + goto error; + } + PUSH(set); + DISPATCH(); + } - TARGET(BUILD_MAP) - x = _PyDict_NewPresized((Py_ssize_t)oparg); - PUSH(x); - if (x != NULL) DISPATCH(); - break; + TARGET(BUILD_MAP) { + PyObject *map = _PyDict_NewPresized((Py_ssize_t)oparg); + if (map == NULL) + goto error; + PUSH(map); + DISPATCH(); + } - TARGET(STORE_MAP) - w = TOP(); /* key */ - u = SECOND(); /* value */ - v = THIRD(); /* dict */ + TARGET(STORE_MAP) { + PyObject *key = TOP(); + PyObject *value = SECOND(); + PyObject *map = THIRD(); + int err; 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; + assert(PyDict_CheckExact(map)); + err = PyDict_SetItem(map, key, value); + Py_DECREF(value); + Py_DECREF(key); + if (err != 0) + goto error; + DISPATCH(); + } - TARGET(MAP_ADD) - w = TOP(); /* key */ - u = SECOND(); /* value */ + TARGET(MAP_ADD) { + PyObject *key = TOP(); + PyObject *value = SECOND(); + PyObject *map; + int err; 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; + map = stack_pointer[-oparg]; /* dict */ + assert(PyDict_CheckExact(map)); + err = PyDict_SetItem(map, key, value); /* v[w] = u */ + Py_DECREF(value); + Py_DECREF(key); + if (err != 0) + goto error; + PREDICT(JUMP_ABSOLUTE); + DISPATCH(); + } - 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(LOAD_ATTR) { + PyObject *name = GETITEM(names, oparg); + PyObject *owner = TOP(); + PyObject *res = PyObject_GetAttr(owner, name); + Py_DECREF(owner); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); + } - 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; + TARGET(COMPARE_OP) { + PyObject *right = POP(); + PyObject *left = TOP(); + PyObject *res = cmp_outcome(oparg, left, right); + Py_DECREF(left); + Py_DECREF(right); + SET_TOP(res); + if (res == NULL) + goto error; PREDICT(POP_JUMP_IF_FALSE); PREDICT(POP_JUMP_IF_TRUE); DISPATCH(); + } - TARGET(IMPORT_NAME) - { + TARGET(IMPORT_NAME) { _Py_IDENTIFIER(__import__); - w = GETITEM(names, oparg); - x = _PyDict_GetItemId(f->f_builtins, &PyId___import__); - if (x == NULL) { + PyObject *name = GETITEM(names, oparg); + PyObject *func = _PyDict_GetItemId(f->f_builtins, &PyId___import__); + PyObject *from, *level, *args, *res; + if (func == NULL) { PyErr_SetString(PyExc_ImportError, "__import__ not found"); - break; + goto error; } - Py_INCREF(x); - v = POP(); - u = TOP(); - if (PyLong_AsLong(u) != -1 || PyErr_Occurred()) - w = PyTuple_Pack(5, - w, + Py_INCREF(func); + from = POP(); + level = TOP(); + if (PyLong_AsLong(level) != -1 || PyErr_Occurred()) + args = PyTuple_Pack(5, + name, f->f_globals, f->f_locals == NULL ? Py_None : f->f_locals, - v, - u); + from, + level); else - w = PyTuple_Pack(4, - w, + args = PyTuple_Pack(4, + name, 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; + from); + Py_DECREF(level); + Py_DECREF(from); + if (args == NULL) { + Py_DECREF(func); + STACKADJ(-1); + goto error; } READ_TIMESTAMP(intr0); - v = x; - x = PyEval_CallObject(v, w); - Py_DECREF(v); + res = PyEval_CallObject(func, args); READ_TIMESTAMP(intr1); - Py_DECREF(w); - SET_TOP(x); - if (x != NULL) DISPATCH(); - break; + Py_DECREF(args); + Py_DECREF(func); + SET_TOP(res); + if (res == NULL) + goto error; + DISPATCH(); } - TARGET(IMPORT_STAR) - v = POP(); + TARGET(IMPORT_STAR) { + PyObject *from = POP(), *locals; + int err; PyFrame_FastToLocals(f); - if ((x = f->f_locals) == NULL) { + locals = f->f_locals; + if (locals == NULL) { PyErr_SetString(PyExc_SystemError, "no locals found during 'import *'"); - break; + goto error; } READ_TIMESTAMP(intr0); - err = import_all_from(x, v); + err = import_all_from(locals, from); READ_TIMESTAMP(intr1); PyFrame_LocalsToFast(f, 0); - Py_DECREF(v); - if (err == 0) DISPATCH(); - break; + Py_DECREF(from); + if (err != 0) + goto error; + DISPATCH(); + } - TARGET(IMPORT_FROM) - w = GETITEM(names, oparg); - v = TOP(); + TARGET(IMPORT_FROM) { + PyObject *name = GETITEM(names, oparg); + PyObject *from = TOP(); + PyObject *res; READ_TIMESTAMP(intr0); - x = import_from(v, w); + res = import_from(from, name); READ_TIMESTAMP(intr1); - PUSH(x); - if (x != NULL) DISPATCH(); - break; + PUSH(res); + if (res == NULL) + goto error; + DISPATCH(); + } - TARGET(JUMP_FORWARD) + 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); + TARGET(POP_JUMP_IF_FALSE) { + PyObject *cond = POP(); + int err; + if (cond == Py_True) { + Py_DECREF(cond); FAST_DISPATCH(); } - if (w == Py_False) { - Py_DECREF(w); + if (cond == Py_False) { + Py_DECREF(cond); JUMPTO(oparg); FAST_DISPATCH(); } - err = PyObject_IsTrue(w); - Py_DECREF(w); + err = PyObject_IsTrue(cond); + Py_DECREF(cond); if (err > 0) err = 0; else if (err == 0) JUMPTO(oparg); else - break; + goto error; DISPATCH(); + } PREDICTED_WITH_ARG(POP_JUMP_IF_TRUE); - TARGET(POP_JUMP_IF_TRUE) - w = POP(); - if (w == Py_False) { - Py_DECREF(w); + TARGET(POP_JUMP_IF_TRUE) { + PyObject *cond = POP(); + int err; + if (cond == Py_False) { + Py_DECREF(cond); FAST_DISPATCH(); } - if (w == Py_True) { - Py_DECREF(w); + if (cond == Py_True) { + Py_DECREF(cond); JUMPTO(oparg); FAST_DISPATCH(); } - err = PyObject_IsTrue(w); - Py_DECREF(w); + err = PyObject_IsTrue(cond); + Py_DECREF(cond); if (err > 0) { err = 0; JUMPTO(oparg); @@ -2415,58 +2554,63 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) else if (err == 0) ; else - break; + goto error; DISPATCH(); + } - TARGET(JUMP_IF_FALSE_OR_POP) - w = TOP(); - if (w == Py_True) { + TARGET(JUMP_IF_FALSE_OR_POP) { + PyObject *cond = TOP(); + int err; + if (cond == Py_True) { STACKADJ(-1); - Py_DECREF(w); + Py_DECREF(cond); FAST_DISPATCH(); } - if (w == Py_False) { + if (cond == Py_False) { JUMPTO(oparg); FAST_DISPATCH(); } - err = PyObject_IsTrue(w); + err = PyObject_IsTrue(cond); if (err > 0) { STACKADJ(-1); - Py_DECREF(w); + Py_DECREF(cond); err = 0; } else if (err == 0) JUMPTO(oparg); else - break; + goto error; DISPATCH(); + } - TARGET(JUMP_IF_TRUE_OR_POP) - w = TOP(); - if (w == Py_False) { + TARGET(JUMP_IF_TRUE_OR_POP) { + PyObject *cond = TOP(); + int err; + if (cond == Py_False) { STACKADJ(-1); - Py_DECREF(w); + Py_DECREF(cond); FAST_DISPATCH(); } - if (w == Py_True) { + if (cond == Py_True) { JUMPTO(oparg); FAST_DISPATCH(); } - err = PyObject_IsTrue(w); + err = PyObject_IsTrue(cond); if (err > 0) { err = 0; JUMPTO(oparg); } else if (err == 0) { STACKADJ(-1); - Py_DECREF(w); + Py_DECREF(cond); } else - break; + goto error; DISPATCH(); + } PREDICTED_WITH_ARG(JUMP_ABSOLUTE); - TARGET(JUMP_ABSOLUTE) + TARGET(JUMP_ABSOLUTE) { JUMPTO(oparg); #if FAST_LOOPS /* Enabling this path speeds-up all while and for-loops by bypassing @@ -2480,60 +2624,60 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) #else DISPATCH(); #endif + } - TARGET(GET_ITER) + 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; + PyObject *iterable = TOP(); + PyObject *iter = PyObject_GetIter(iterable); + Py_DECREF(iterable); + SET_TOP(iter); + if (iter == NULL) + goto error; + PREDICT(FOR_ITER); + DISPATCH(); + } PREDICTED_WITH_ARG(FOR_ITER); - TARGET(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); + PyObject *iter = TOP(); + PyObject *next = (*iter->ob_type->tp_iternext)(iter); + if (next != NULL) { + PUSH(next); PREDICT(STORE_FAST); PREDICT(UNPACK_SEQUENCE); DISPATCH(); } if (PyErr_Occurred()) { - if (!PyErr_ExceptionMatches( - PyExc_StopIteration)) - break; + if (!PyErr_ExceptionMatches(PyExc_StopIteration)) + goto error; PyErr_Clear(); } /* iterator ended normally */ - x = v = POP(); - Py_DECREF(v); + STACKADJ(-1); + Py_DECREF(iter); JUMPBY(oparg); DISPATCH(); + } - TARGET(BREAK_LOOP) + TARGET(BREAK_LOOP) { why = WHY_BREAK; goto fast_block_end; + } - TARGET(CONTINUE_LOOP) + TARGET(CONTINUE_LOOP) { retval = PyLong_FromLong(oparg); - if (!retval) { - x = NULL; - break; - } + if (retval == NULL) + goto error; 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: + _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. @@ -2542,37 +2686,35 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) PyFrame_BlockSetup(f, opcode, INSTR_OFFSET() + oparg, STACK_LEVEL()); DISPATCH(); + } - TARGET(SETUP_WITH) - { + TARGET(SETUP_WITH) { _Py_IDENTIFIER(__exit__); _Py_IDENTIFIER(__enter__); - w = TOP(); - x = special_lookup(w, &PyId___exit__); - if (!x) - break; - SET_TOP(x); - u = special_lookup(w, &PyId___enter__); - Py_DECREF(w); - if (!u) { - x = NULL; - break; - } - x = PyObject_CallFunctionObjArgs(u, NULL); - Py_DECREF(u); - if (!x) - break; + PyObject *mgr = TOP(); + PyObject *exit = special_lookup(mgr, &PyId___exit__), *enter; + PyObject *res; + if (exit == NULL) + goto error; + SET_TOP(exit); + enter = special_lookup(mgr, &PyId___enter__); + Py_DECREF(mgr); + if (enter == NULL) + goto error; + res = PyObject_CallFunctionObjArgs(enter, NULL); + Py_DECREF(enter); + if (res == NULL) + goto error; /* 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); + PUSH(res); DISPATCH(); } - TARGET(WITH_CLEANUP) - { + TARGET(WITH_CLEANUP) { /* At the top of the stack are 1-3 values indicating how/why we entered the finally clause: - TOP = None @@ -2599,42 +2741,42 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) */ PyObject *exit_func; - u = TOP(); - if (u == Py_None) { + PyObject *exc = TOP(), *val = Py_None, *tb = Py_None, *res; + int err; + if (exc == Py_None) { (void)POP(); exit_func = TOP(); - SET_TOP(u); - v = w = Py_None; + SET_TOP(exc); } - else if (PyLong_Check(u)) { - (void)POP(); - switch(PyLong_AsLong(u)) { + else if (PyLong_Check(exc)) { + STACKADJ(-1); + switch (PyLong_AsLong(exc)) { case WHY_RETURN: case WHY_CONTINUE: /* Retval in TOP. */ exit_func = SECOND(); SET_SECOND(TOP()); - SET_TOP(u); + SET_TOP(exc); break; default: exit_func = TOP(); - SET_TOP(u); + SET_TOP(exc); break; } - u = v = w = Py_None; + exc = Py_None; } else { - PyObject *tp, *exc, *tb; + PyObject *tp2, *exc2, *tb2; PyTryBlock *block; - v = SECOND(); - w = THIRD(); - tp = FOURTH(); - exc = PEEK(5); - tb = PEEK(6); + val = SECOND(); + tb = THIRD(); + tp2 = FOURTH(); + exc2 = PEEK(5); + tb2 = PEEK(6); exit_func = PEEK(7); - SET_VALUE(7, tb); - SET_VALUE(6, exc); - SET_VALUE(5, tp); + SET_VALUE(7, tb2); + SET_VALUE(6, exc2); + SET_VALUE(5, tp2); /* UNWIND_EXCEPT_HANDLER will pop this off. */ SET_FOURTH(NULL); /* We just shifted the stack down, so we have @@ -2645,56 +2787,53 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) block->b_level--; } /* XXX Not the fastest way to call it... */ - x = PyObject_CallFunctionObjArgs(exit_func, u, v, w, - NULL); + res = PyObject_CallFunctionObjArgs(exit_func, exc, val, tb, NULL); Py_DECREF(exit_func); - if (x == NULL) - break; /* Go to error exit */ + if (res == NULL) + goto error; - if (u != Py_None) - err = PyObject_IsTrue(x); + if (exc != Py_None) + err = PyObject_IsTrue(res); else err = 0; - Py_DECREF(x); + Py_DECREF(res); if (err < 0) - break; /* Go to error exit */ + goto error; else if (err > 0) { err = 0; /* There was an exception and a True return */ PUSH(PyLong_FromLong((long) WHY_SILENCED)); } PREDICT(END_FINALLY); - break; + DISPATCH(); } - TARGET(CALL_FUNCTION) - { - PyObject **sp; + TARGET(CALL_FUNCTION) { + PyObject **sp, *res; PCALL(PCALL_ALL); sp = stack_pointer; #ifdef WITH_TSC - x = call_function(&sp, oparg, &intr0, &intr1); + res = call_function(&sp, oparg, &intr0, &intr1); #else - x = call_function(&sp, oparg); + res = call_function(&sp, oparg); #endif stack_pointer = sp; - PUSH(x); - if (x != NULL) - DISPATCH(); - break; + PUSH(res); + if (res == NULL) + goto error; + DISPATCH(); } 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: - { + _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; + PyObject **pfunc, *func, **sp, *res; PCALL(PCALL_ALL); if (flags & CALL_FLAG_VAR) n++; @@ -2717,137 +2856,156 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) Py_INCREF(func); sp = stack_pointer; READ_TIMESTAMP(intr0); - x = ext_do_call(func, &sp, flags, na, nk); + res = 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); + PyObject *o = POP(); + Py_DECREF(o); } - PUSH(x); - if (x != NULL) - DISPATCH(); - break; + PUSH(res); + if (res == NULL) + goto error; + DISPATCH(); } TARGET_WITH_IMPL(MAKE_CLOSURE, _make_function) TARGET(MAKE_FUNCTION) - _make_function: - { + _make_function: { int posdefaults = oparg & 0xff; int kwdefaults = (oparg>>8) & 0xff; int num_annotations = (oparg >> 16) & 0x7fff; - w = POP(); /* qualname */ - v = POP(); /* code object */ - x = PyFunction_NewWithQualName(v, f->f_globals, w); - Py_DECREF(v); - Py_DECREF(w); + PyObject *qualname = POP(); /* qualname */ + PyObject *code = POP(); /* code object */ + PyObject *func = PyFunction_NewWithQualName(code, f->f_globals, qualname); + Py_DECREF(code); + Py_DECREF(qualname); + + if (func == NULL) + goto error; - if (x != NULL && opcode == MAKE_CLOSURE) { - v = POP(); - if (PyFunction_SetClosure(x, v) != 0) { + if (opcode == MAKE_CLOSURE) { + PyObject *closure = POP(); + if (PyFunction_SetClosure(func, closure) != 0) { /* Can't happen unless bytecode is corrupt. */ - why = WHY_EXCEPTION; + Py_DECREF(func); + Py_DECREF(closure); + goto error; } - Py_DECREF(v); + Py_DECREF(closure); } - if (x != NULL && num_annotations > 0) { + if (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; + PyObject *names = POP(); /* names of args with annotations */ + PyObject *anns = PyDict_New(); + if (anns == NULL) { + Py_DECREF(func); + goto error; } - name_ix = PyTuple_Size(u); + name_ix = PyTuple_Size(names); assert(num_annotations == name_ix+1); while (name_ix > 0) { + PyObject *name, *value; + int err; --name_ix; - t = PyTuple_GET_ITEM(u, name_ix); - w = POP(); - /* XXX(nnorwitz): check for errors */ - PyDict_SetItem(v, t, w); - Py_DECREF(w); + name = PyTuple_GET_ITEM(names, name_ix); + value = POP(); + err = PyDict_SetItem(anns, name, value); + Py_DECREF(value); + if (err != 0) { + Py_DECREF(anns); + Py_DECREF(func); + goto error; + } } - if (PyFunction_SetAnnotations(x, v) != 0) { + if (PyFunction_SetAnnotations(func, anns) != 0) { /* Can't happen unless PyFunction_SetAnnotations changes. */ - why = WHY_EXCEPTION; + Py_DECREF(anns); + Py_DECREF(func); + goto error; } - Py_DECREF(v); - Py_DECREF(u); + Py_DECREF(anns); + Py_DECREF(names); } /* 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; + if (kwdefaults > 0) { + PyObject *defs = PyDict_New(); + if (defs == NULL) { + Py_DECREF(func); + goto error; } - while (--posdefaults >= 0) { - w = POP(); - PyTuple_SET_ITEM(v, posdefaults, w); + while (--kwdefaults >= 0) { + PyObject *v = POP(); /* default value */ + PyObject *key = POP(); /* kw only arg name */ + int err = PyDict_SetItem(defs, key, v); + Py_DECREF(v); + Py_DECREF(key); + if (err != 0) { + Py_DECREF(defs); + Py_DECREF(func); + goto error; + } } - if (PyFunction_SetDefaults(x, v) != 0) { + if (PyFunction_SetKwDefaults(func, defs) != 0) { /* Can't happen unless - PyFunction_SetDefaults changes. */ - why = WHY_EXCEPTION; + PyFunction_SetKwDefaults changes. */ + Py_DECREF(func); + Py_DECREF(defs); + goto error; } - Py_DECREF(v); + Py_DECREF(defs); } - 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 (posdefaults > 0) { + PyObject *defs = PyTuple_New(posdefaults); + if (defs == NULL) { + Py_DECREF(func); + goto error; } - if (PyFunction_SetKwDefaults(x, v) != 0) { + while (--posdefaults >= 0) + PyTuple_SET_ITEM(defs, posdefaults, POP()); + if (PyFunction_SetDefaults(func, defs) != 0) { /* Can't happen unless - PyFunction_SetKwDefaults changes. */ - why = WHY_EXCEPTION; + PyFunction_SetDefaults changes. */ + Py_DECREF(defs); + Py_DECREF(func); + goto error; } - Py_DECREF(v); + Py_DECREF(defs); } - PUSH(x); - break; + PUSH(func); + DISPATCH(); } - TARGET(BUILD_SLICE) + TARGET(BUILD_SLICE) { + PyObject *start, *stop, *step, *slice; if (oparg == 3) - w = POP(); + step = 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; + step = NULL; + stop = POP(); + start = TOP(); + slice = PySlice_New(start, stop, step); + Py_DECREF(start); + Py_DECREF(stop); + Py_XDECREF(step); + SET_TOP(slice); + if (slice == NULL) + goto error; + DISPATCH(); + } - TARGET(EXTENDED_ARG) + TARGET(EXTENDED_ARG) { opcode = NEXTOP(); oparg = oparg<<16 | NEXTARG(); goto dispatch_opcode; + } #if USE_COMPUTED_GOTOS _unknown_opcode: @@ -2858,8 +3016,7 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) PyFrame_GetLineNumber(f), opcode); PyErr_SetString(PyExc_SystemError, "unknown opcode"); - why = WHY_EXCEPTION; - break; + goto error; #ifdef CASE_TOO_BIG } @@ -2867,71 +3024,35 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag) } /* switch */ - on_error: + /* This should never be reached. Every opcode should end with DISPATCH() + or goto error. */ + assert(0); +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 */ + assert(why == WHY_NOT); + why = WHY_EXCEPTION; - 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); - } - } + /* Double-check exception status. */ +#ifdef NDEBUG + if (!PyErr_Occurred()) + PyErr_SetString(PyExc_SystemError, + "error return without exception set"); +#else + assert(PyErr_Occurred()); #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); - } + /* Log traceback info. */ + PyTraceBack_Here(f); - /* For the rest, treat WHY_RERAISE as WHY_EXCEPTION */ + if (tstate->c_tracefunc != NULL) + call_exc_trace(tstate->c_tracefunc, tstate->c_traceobj, f); - if (why == WHY_RERAISE) - why = WHY_EXCEPTION; +fast_block_end: + assert(why != WHY_NOT); /* 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]; @@ -2978,7 +3099,10 @@ fast_block_end: Python main loop. */ PyErr_NormalizeException( &exc, &val, &tb); - PyException_SetTraceback(val, tb); + if (tb != NULL) + PyException_SetTraceback(val, tb); + else + PyException_SetTraceback(val, Py_None); Py_INCREF(exc); tstate->exc_type = exc; Py_INCREF(val); @@ -3010,18 +3134,23 @@ fast_block_end: break; READ_TIMESTAMP(loop1); + assert(!PyErr_Occurred()); + } /* main loop */ assert(why != WHY_YIELD); /* Pop remaining stack entries. */ while (!EMPTY()) { - v = POP(); - Py_XDECREF(v); + PyObject *o = POP(); + Py_XDECREF(o); } if (why != WHY_RETURN) retval = NULL; + assert((retval != NULL && !PyErr_Occurred()) + || (retval == NULL && PyErr_Occurred())); + 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 @@ -3078,6 +3207,7 @@ fast_yield: /* pop frame */ exit_eval_frame: Py_LeaveRecursiveCall(); + f->f_executing = 0; tstate->frame = f->f_back; return retval; @@ -3243,9 +3373,9 @@ PyEval_EvalCodeEx(PyObject *_co, PyObject *globals, PyObject *locals, PyObject **defs, int defcount, PyObject *kwdefs, PyObject *closure) { PyCodeObject* co = (PyCodeObject*)_co; - register PyFrameObject *f; - register PyObject *retval = NULL; - register PyObject **fastlocals, **freevars; + PyFrameObject *f; + PyObject *retval = NULL; + PyObject **fastlocals, **freevars; PyThreadState *tstate = PyThreadState_GET(); PyObject *x, *u; int total_args = co->co_argcount + co->co_kwonlyargcount; @@ -3522,7 +3652,7 @@ restore_and_clear_exc_state(PyThreadState *tstate, PyFrameObject *f) /* Logic for the raise statement (too complicated for inlining). This *consumes* a reference count to each of its arguments. */ -static enum why_code +static int do_raise(PyObject *exc, PyObject *cause) { PyObject *type = NULL, *value = NULL; @@ -3537,13 +3667,13 @@ do_raise(PyObject *exc, PyObject *cause) if (type == Py_None) { PyErr_SetString(PyExc_RuntimeError, "No active exception to reraise"); - return WHY_EXCEPTION; - } + return 0; + } Py_XINCREF(type); Py_XINCREF(value); Py_XINCREF(tb); PyErr_Restore(type, value, tb); - return WHY_RERAISE; + return 1; } /* We support the following forms of raise: @@ -3606,13 +3736,13 @@ do_raise(PyObject *exc, PyObject *cause) /* PyErr_SetObject incref's its arguments */ Py_XDECREF(value); Py_XDECREF(type); - return WHY_EXCEPTION; + return 0; raise_error: Py_XDECREF(value); Py_XDECREF(type); Py_XDECREF(cause); - return WHY_EXCEPTION; + return 0; } /* Iterate v argcnt times and store the results on the stack (via decreasing @@ -3711,7 +3841,7 @@ prtrace(PyObject *v, char *str) static void call_exc_trace(Py_tracefunc func, PyObject *self, PyFrameObject *f) { - PyObject *type, *value, *traceback, *arg; + PyObject *type, *value, *traceback, *orig_traceback, *arg; int err; PyErr_Fetch(&type, &value, &traceback); if (value == NULL) { @@ -3719,6 +3849,11 @@ call_exc_trace(Py_tracefunc func, PyObject *self, PyFrameObject *f) Py_INCREF(value); } PyErr_NormalizeException(&type, &value, &traceback); + orig_traceback = traceback; + if (traceback == NULL) { + Py_INCREF(Py_None); + traceback = Py_None; + } arg = PyTuple_Pack(3, type, value, traceback); if (arg == NULL) { PyErr_Restore(type, value, traceback); @@ -3727,11 +3862,11 @@ call_exc_trace(Py_tracefunc func, PyObject *self, PyFrameObject *f) err = call_trace(func, self, f, PyTrace_EXCEPTION, arg); Py_DECREF(arg); if (err == 0) - PyErr_Restore(type, value, traceback); + PyErr_Restore(type, value, orig_traceback); else { Py_XDECREF(type); Py_XDECREF(value); - Py_XDECREF(traceback); + Py_XDECREF(orig_traceback); } } @@ -3760,7 +3895,7 @@ static int call_trace(Py_tracefunc func, PyObject *obj, PyFrameObject *frame, int what, PyObject *arg) { - register PyThreadState *tstate = frame->f_tstate; + PyThreadState *tstate = frame->f_tstate; int result; if (tstate->tracing) return 0; @@ -3926,6 +4061,13 @@ PyEval_CallObjectWithKeywords(PyObject *func, PyObject *arg, PyObject *kw) { PyObject *result; +#ifdef Py_DEBUG + /* PyEval_CallObjectWithKeywords() must not be called with an exception + set, because it may clear it (directly or indirectly) + and so the caller looses its exception */ + assert(!PyErr_Occurred()); +#endif + if (arg == NULL) { arg = PyTuple_New(0); if (arg == NULL) @@ -3948,6 +4090,9 @@ PyEval_CallObjectWithKeywords(PyObject *func, PyObject *arg, PyObject *kw) result = PyObject_Call(func, arg, kw); Py_DECREF(arg); + + assert((result != NULL && !PyErr_Occurred()) + || (result == NULL && PyErr_Occurred())); return result; } @@ -4065,10 +4210,15 @@ call_function(PyObject ***pp_stack, int oparg 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); + if (callargs != NULL) { + READ_TIMESTAMP(*pintr0); + C_TRACE(x, PyCFunction_Call(func,callargs,NULL)); + READ_TIMESTAMP(*pintr1); + Py_XDECREF(callargs); + } + else { + x = NULL; + } } } else { if (PyMethod_Check(func) && PyMethod_GET_SELF(func) != NULL) { @@ -4093,6 +4243,8 @@ call_function(PyObject ***pp_stack, int oparg READ_TIMESTAMP(*pintr1); Py_DECREF(func); } + assert((x != NULL && !PyErr_Occurred()) + || (x == NULL && PyErr_Occurred())); /* Clear the stack of the function object. Also removes the arguments in case they weren't consumed already @@ -4103,6 +4255,9 @@ call_function(PyObject ***pp_stack, int oparg Py_DECREF(w); PCALL(PCALL_POP); } + + assert((x != NULL && !PyErr_Occurred()) + || (x == NULL && PyErr_Occurred())); return x; } @@ -4386,6 +4541,8 @@ ext_call_fail: Py_XDECREF(callargs); Py_XDECREF(kwdict); Py_XDECREF(stararg); + assert((result != NULL && !PyErr_Occurred()) + || (result == NULL && PyErr_Occurred())); return result; } @@ -4424,7 +4581,7 @@ _PyEval_SliceIndex(PyObject *v, Py_ssize_t *pi) "BaseException is not allowed" static PyObject * -cmp_outcome(int op, register PyObject *v, register PyObject *w) +cmp_outcome(int op, PyObject *v, PyObject *w) { int res = 0; switch (op) { @@ -4482,7 +4639,7 @@ import_from(PyObject *v, PyObject *name) x = PyObject_GetAttr(v, name); if (x == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) { - PyErr_Format(PyExc_ImportError, "cannot import name %S", name); + PyErr_Format(PyExc_ImportError, "cannot import name %R", name); } return x; } |