#define PY_LOCAL_AGGRESSIVE

#include "Python.h"

#include "pycore_abstract.h" // _PyIndex_Check()

#include "pycore_call.h"

#include "pycore_ceval.h"

#include "pycore_code.h"

#include "pycore_initconfig.h"

#include "pycore_object.h"

#include "pycore_pyerrors.h"

#include "pycore_pylifecycle.h"

#include "pycore_pymem.h" // _PyMem_IsPtrFreed()

#include "pycore_pystate.h" // _PyInterpreterState_GET()

#include "pycore_sysmodule.h"

#include "pycore_tupleobject.h"

#include "code.h"

#include "dictobject.h"

#include "frameobject.h"

#include "opcode.h"

#include "pydtrace.h"

#include "setobject.h"

#include <ctype.h>

#ifdef Py_DEBUG

#define LLTRACE 1 /* Low-level trace feature */

#define CHECKEXC 1 /* Double-check exception checking */

#if !defined(Py_BUILD_CORE)

# error "ceval.c must be build with Py_BUILD_CORE define for best performance"

_Py_IDENTIFIER(__name__);

Py_LOCAL_INLINE(PyObject *) call_function(

PyThreadState *tstate, PyObject ***pp_stack,

Py_ssize_t oparg, PyObject *kwnames);

static PyObject * do_call_core(

PyThreadState *tstate, PyObject *func,

PyObject *callargs, PyObject *kwdict);

#ifdef LLTRACE

static int lltrace;

static int prtrace(PyThreadState *, PyObject *, const char *);

static int call_trace(Py_tracefunc, PyObject *,

PyThreadState *, PyFrameObject *,

int, PyObject *);

static int call_trace_protected(Py_tracefunc, PyObject *,

PyThreadState *, PyFrameObject *,

int, PyObject *);

static void call_exc_trace(Py_tracefunc, PyObject *,

PyThreadState *, PyFrameObject *);

static int maybe_call_line_trace(Py_tracefunc, PyObject *,

PyThreadState *, PyFrameObject *,

int *, int *, int *);

static void maybe_dtrace_line(PyFrameObject *, int *, int *, int *);

static void dtrace_function_entry(PyFrameObject *);

static void dtrace_function_return(PyFrameObject *);

static PyObject * import_name(PyThreadState *, PyFrameObject *,

PyObject *, PyObject *, PyObject *);

static PyObject * import_from(PyThreadState *, PyObject *, PyObject *);

static int import_all_from(PyThreadState *, PyObject *, PyObject *);

static void format_exc_check_arg(PyThreadState *, PyObject *, const char *, PyObject *);

static void format_exc_unbound(PyThreadState *tstate, PyCodeObject *co, int oparg);

static PyObject * unicode_concatenate(PyThreadState *, PyObject *, PyObject *,

PyFrameObject *, const _Py_CODEUNIT *);

static PyObject * special_lookup(PyThreadState *, PyObject *, _Py_Identifier *);

static int check_args_iterable(PyThreadState *, PyObject *func, PyObject *vararg);

static void format_kwargs_error(PyThreadState *, PyObject *func, PyObject *kwargs);

static void format_awaitable_error(PyThreadState *, PyTypeObject *, int, int);

#define NAME_ERROR_MSG \

"name '%.200s' is not defined"

#define UNBOUNDLOCAL_ERROR_MSG \

"local variable '%.200s' referenced before assignment"

#define UNBOUNDFREE_ERROR_MSG \

"free variable '%.200s' referenced before assignment" \

" in enclosing scope"

#ifdef DYNAMIC_EXECUTION_PROFILE

#ifdef DXPAIRS

static long dxpairs[257][256];

#define dxp dxpairs[256]

static long dxp[256];

#ifdef Py_DEBUG

#define OPCACHE_MIN_RUNS 0 /* disable opcache */

#define OPCACHE_MIN_RUNS 1024 /* create opcache when code executed this time */

#define OPCACHE_STATS 0 /* Enable stats */

#if OPCACHE_STATS

static size_t opcache_code_objects = 0;

static size_t opcache_code_objects_extra_mem = 0;

static size_t opcache_global_opts = 0;

static size_t opcache_global_hits = 0;

static size_t opcache_global_misses = 0;

#ifndef NDEBUG

static int

is_tstate_valid(PyThreadState *tstate)

{

assert(!_PyMem_IsPtrFreed(tstate));

assert(!_PyMem_IsPtrFreed(tstate->interp));

return 1;

}

static inline void

COMPUTE_EVAL_BREAKER(PyInterpreterState *interp,

struct _ceval_runtime_state *ceval,

struct _ceval_state *ceval2)

{

_Py_atomic_store_relaxed(&ceval2->eval_breaker,

_Py_atomic_load_relaxed(&ceval2->gil_drop_request)

| (_Py_atomic_load_relaxed(&ceval->signals_pending)

&& _Py_ThreadCanHandleSignals(interp))

| (_Py_atomic_load_relaxed(&ceval2->pending.calls_to_do)

&& _Py_ThreadCanHandlePendingCalls())

| ceval2->pending.async_exc);

}

static inline void

SET_GIL_DROP_REQUEST(PyInterpreterState *interp)

{

struct _ceval_state *ceval2 = &interp->ceval;

_Py_atomic_store_relaxed(&ceval2->gil_drop_request, 1);

_Py_atomic_store_relaxed(&ceval2->eval_breaker, 1);

}

static inline void

RESET_GIL_DROP_REQUEST(PyInterpreterState *interp)

{

struct _ceval_runtime_state *ceval = &interp->runtime->ceval;

struct _ceval_state *ceval2 = &interp->ceval;

_Py_atomic_store_relaxed(&ceval2->gil_drop_request, 0);

COMPUTE_EVAL_BREAKER(interp, ceval, ceval2);

}

static inline void

SIGNAL_PENDING_CALLS(PyInterpreterState *interp)

{

struct _ceval_runtime_state *ceval = &interp->runtime->ceval;

struct _ceval_state *ceval2 = &interp->ceval;

_Py_atomic_store_relaxed(&ceval2->pending.calls_to_do, 1);

COMPUTE_EVAL_BREAKER(interp, ceval, ceval2);

}

static inline void

UNSIGNAL_PENDING_CALLS(PyInterpreterState *interp)

{

struct _ceval_runtime_state *ceval = &interp->runtime->ceval;

struct _ceval_state *ceval2 = &interp->ceval;

_Py_atomic_store_relaxed(&ceval2->pending.calls_to_do, 0);

COMPUTE_EVAL_BREAKER(interp, ceval, ceval2);

}

static inline void

SIGNAL_PENDING_SIGNALS(PyInterpreterState *interp, int force)

{

struct _ceval_runtime_state *ceval = &interp->runtime->ceval;

struct _ceval_state *ceval2 = &interp->ceval;

_Py_atomic_store_relaxed(&ceval->signals_pending, 1);

if (force) {

_Py_atomic_store_relaxed(&ceval2->eval_breaker, 1);

}

else {

/* eval_breaker is not set to 1 if thread_can_handle_signals() is false */

COMPUTE_EVAL_BREAKER(interp, ceval, ceval2);

}

}

static inline void

UNSIGNAL_PENDING_SIGNALS(PyInterpreterState *interp)

{

struct _ceval_runtime_state *ceval = &interp->runtime->ceval;

struct _ceval_state *ceval2 = &interp->ceval;

_Py_atomic_store_relaxed(&ceval->signals_pending, 0);

COMPUTE_EVAL_BREAKER(interp, ceval, ceval2);

}

static inline void

SIGNAL_ASYNC_EXC(PyInterpreterState *interp)

{

struct _ceval_state *ceval2 = &interp->ceval;

ceval2->pending.async_exc = 1;

_Py_atomic_store_relaxed(&ceval2->eval_breaker, 1);

}

static inline void

UNSIGNAL_ASYNC_EXC(PyInterpreterState *interp)

{

struct _ceval_runtime_state *ceval = &interp->runtime->ceval;

struct _ceval_state *ceval2 = &interp->ceval;

ceval2->pending.async_exc = 0;

COMPUTE_EVAL_BREAKER(interp, ceval, ceval2);

}

#ifdef HAVE_ERRNO_H

#include <errno.h>

#include "ceval_gil.h"

void _Py_NO_RETURN

_Py_FatalError_TstateNULL(const char *func)

{

_Py_FatalErrorFunc(func,

"the function must be called with the GIL held, "

"but the GIL is released "

"(the current Python thread state is NULL)");

}

_PyEval_ThreadsInitialized(_PyRuntimeState *runtime)

{

return gil_created(&runtime->ceval.gil);

}

PyEval_ThreadsInitialized(void)

{

_PyRuntimeState *runtime = &_PyRuntime;

return _PyEval_ThreadsInitialized(runtime);

}

_PyEval_InitGIL(PyThreadState *tstate)

{

if (!_Py_IsMainInterpreter(tstate)) {

/* Currently, the GIL is shared by all interpreters,

return _PyStatus_OK();

}

struct _gil_runtime_state *gil = &tstate->interp->runtime->ceval.gil;

assert(!gil_created(gil));

PyThread_init_thread();

create_gil(gil);

take_gil(tstate);

assert(gil_created(gil));

return _PyStatus_OK();

}

_PyEval_FiniGIL(PyThreadState *tstate)

{

if (!_Py_IsMainInterpreter(tstate)) {

/* Currently, the GIL is shared by all interpreters,

return;

}

struct _gil_runtime_state *gil = &tstate->interp->runtime->ceval.gil;

if (!gil_created(gil)) {

/* First Py_InitializeFromConfig() call: the GIL doesn't exist

return;

}

destroy_gil(gil);

assert(!gil_created(gil));

}

PyEval_InitThreads(void)

{

/* Do nothing: kept for backward compatibility */

}

_PyEval_Fini(void)

{

#if OPCACHE_STATS

fprintf(stderr, "-- Opcode cache number of objects = %zd\n",

opcache_code_objects);

fprintf(stderr, "-- Opcode cache total extra mem = %zd\n",

opcache_code_objects_extra_mem);

fprintf(stderr, "\n");

fprintf(stderr, "-- Opcode cache LOAD_GLOBAL hits = %zd (%d%%)\n",

opcache_global_hits,

(int) (100.0 * opcache_global_hits /

(opcache_global_hits + opcache_global_misses)));

fprintf(stderr, "-- Opcode cache LOAD_GLOBAL misses = %zd (%d%%)\n",

opcache_global_misses,

(int) (100.0 * opcache_global_misses /

(opcache_global_hits + opcache_global_misses)));

fprintf(stderr, "-- Opcode cache LOAD_GLOBAL opts = %zd\n",

opcache_global_opts);

fprintf(stderr, "\n");

}

PyEval_AcquireLock(void)

{

_PyRuntimeState *runtime = &_PyRuntime;

PyThreadState *tstate = _PyRuntimeState_GetThreadState(runtime);

_Py_EnsureTstateNotNULL(tstate);

take_gil(tstate);

}

PyEval_ReleaseLock(void)

{

_PyRuntimeState *runtime = &_PyRuntime;

PyThreadState *tstate = _PyRuntimeState_GetThreadState(runtime);

/* This function must succeed when the current thread state is NULL.

struct _ceval_runtime_state *ceval = &runtime->ceval;

struct _ceval_state *ceval2 = &tstate->interp->ceval;

drop_gil(ceval, ceval2, tstate);

}

_PyEval_ReleaseLock(PyThreadState *tstate)

{

struct _ceval_runtime_state *ceval = &tstate->interp->runtime->ceval;

struct _ceval_state *ceval2 = &tstate->interp->ceval;

drop_gil(ceval, ceval2, tstate);

}

PyEval_AcquireThread(PyThreadState *tstate)

{

_Py_EnsureTstateNotNULL(tstate);

take_gil(tstate);

struct _gilstate_runtime_state *gilstate = &tstate->interp->runtime->gilstate;

if (_PyThreadState_Swap(gilstate, tstate) != NULL) {

Py_FatalError("non-NULL old thread state");

}

}

PyEval_ReleaseThread(PyThreadState *tstate)

{

assert(is_tstate_valid(tstate));

_PyRuntimeState *runtime = tstate->interp->runtime;

PyThreadState *new_tstate = _PyThreadState_Swap(&runtime->gilstate, NULL);

if (new_tstate != tstate) {

Py_FatalError("wrong thread state");

}

struct _ceval_runtime_state *ceval = &runtime->ceval;

struct _ceval_state *ceval2 = &tstate->interp->ceval;

drop_gil(ceval, ceval2, tstate);

}

#ifdef HAVE_FORK

_PyEval_ReInitThreads(_PyRuntimeState *runtime)

{

PyThreadState *tstate = _PyRuntimeState_GetThreadState(runtime);

_Py_EnsureTstateNotNULL(tstate);

struct _gil_runtime_state *gil = &runtime->ceval.gil;

if (!gil_created(gil)) {

return;

}

recreate_gil(gil);

take_gil(tstate);

struct _pending_calls *pending = &tstate->interp->ceval.pending;

if (_PyThread_at_fork_reinit(&pending->lock) < 0) {

Py_FatalError("Can't initialize threads for pending calls");

}

/* Destroy all threads except the current one */

_PyThreadState_DeleteExcept(runtime, tstate);

}

_PyEval_SignalAsyncExc(PyThreadState *tstate)

{

assert(is_tstate_valid(tstate));

SIGNAL_ASYNC_EXC(tstate->interp);

}

PyThreadState *

PyEval_SaveThread(void)

{

_PyRuntimeState *runtime = &_PyRuntime;

PyThreadState *tstate = _PyThreadState_Swap(&runtime->gilstate, NULL);

_Py_EnsureTstateNotNULL(tstate);

struct _ceval_runtime_state *ceval = &runtime->ceval;

struct _ceval_state *ceval2 = &tstate->interp->ceval;

assert(gil_created(&ceval->gil));

drop_gil(ceval, ceval2, tstate);

return tstate;

}

PyEval_RestoreThread(PyThreadState *tstate)

{

_Py_EnsureTstateNotNULL(tstate);

take_gil(tstate);

struct _gilstate_runtime_state *gilstate = &tstate->interp->runtime->gilstate;

_PyThreadState_Swap(gilstate, tstate);

}

_PyEval_SignalReceived(PyInterpreterState *interp)

{

#ifdef MS_WINDOWS

// bpo-42296: On Windows, _PyEval_SignalReceived() is called from a signal

// handler which can run in a thread different than the Python thread, in

// which case _Py_ThreadCanHandleSignals() is wrong. Ignore

// _Py_ThreadCanHandleSignals() and always set eval_breaker to 1.

//

// The next eval_frame_handle_pending() call will call

// _Py_ThreadCanHandleSignals() to recompute eval_breaker.

int force = 1;

int force = 0;

/* bpo-30703: Function called when the C signal handler of Python gets a

SIGNAL_PENDING_SIGNALS(interp, force);

}

static int

_push_pending_call(struct _pending_calls *pending,

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

{

int i = pending->last;

int j = (i + 1) % NPENDINGCALLS;

if (j == pending->first) {

return -1; /* Queue full */

}

pending->calls[i].func = func;

pending->calls[i].arg = arg;

pending->last = j;

return 0;

}

static void

_pop_pending_call(struct _pending_calls *pending,

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

{

int i = pending->first;

if (i == pending->last) {

return; /* Queue empty */

}

*func = pending->calls[i].func;

*arg = pending->calls[i].arg;

pending->first = (i + 1) % NPENDINGCALLS;

}

_PyEval_AddPendingCall(PyInterpreterState *interp,

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

{

struct _pending_calls *pending = &interp->ceval.pending;

/* Ensure that _PyEval_InitPendingCalls() was called

assert(pending->lock != NULL);

PyThread_acquire_lock(pending->lock, WAIT_LOCK);

int result = _push_pending_call(pending, func, arg);

PyThread_release_lock(pending->lock);

/* signal main loop */

SIGNAL_PENDING_CALLS(interp);

return result;

}

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

{

/* Best-effort to support subinterpreters and calls with the GIL released.

PyThreadState *tstate = _PyThreadState_GET();

if (tstate == NULL) {

tstate = PyGILState_GetThisThreadState();

}

PyInterpreterState *interp;

if (tstate != NULL) {

interp = tstate->interp;

}

else {

/* Last resort: use the main interpreter */

interp = _PyRuntime.interpreters.main;

}

return _PyEval_AddPendingCall(interp, func, arg);

}

static int

handle_signals(PyThreadState *tstate)

{

assert(is_tstate_valid(tstate));

if (!_Py_ThreadCanHandleSignals(tstate->interp)) {

return 0;

}

UNSIGNAL_PENDING_SIGNALS(tstate->interp);

if (_PyErr_CheckSignalsTstate(tstate) < 0) {

/* On failure, re-schedule a call to handle_signals(). */

SIGNAL_PENDING_SIGNALS(tstate->interp, 0);

return -1;

}

return 0;

}

static int

make_pending_calls(PyThreadState *tstate)

{

assert(is_tstate_valid(tstate));

/* only execute pending calls on main thread */

if (!_Py_ThreadCanHandlePendingCalls()) {

return 0;

}

/* don't perform recursive pending calls */

static int busy = 0;

if (busy) {

return 0;

}

busy = 1;

/* unsignal before starting to call callbacks, so that any callback

UNSIGNAL_PENDING_CALLS(tstate->interp);

int res = 0;

/* perform a bounded number of calls, in case of recursion */

struct _pending_calls *pending = &tstate->interp->ceval.pending;

for (int i=0; i<NPENDINGCALLS; i++) {

int (*func)(void *) = NULL;

void *arg = NULL;

/* pop one item off the queue while holding the lock */

PyThread_acquire_lock(pending->lock, WAIT_LOCK);

_pop_pending_call(pending, &func, &arg);

PyThread_release_lock(pending->lock);

/* having released the lock, perform the callback */

if (func == NULL) {

break;

}

res = func(arg);

if (res) {

goto error;

}

}

busy = 0;

return res;

error:

busy = 0;

SIGNAL_PENDING_CALLS(tstate->interp);

return res;

}

_Py_FinishPendingCalls(PyThreadState *tstate)

{

assert(PyGILState_Check());

struct _pending_calls *pending = &tstate->interp->ceval.pending;

if (!_Py_atomic_load_relaxed(&(pending->calls_to_do))) {

return;

}

if (make_pending_calls(tstate) < 0) {

PyObject *exc, *val, *tb;

_PyErr_Fetch(tstate, &exc, &val, &tb);

PyErr_BadInternalCall();

_PyErr_ChainExceptions(exc, val, tb);

_PyErr_Print(tstate);

}

}

Py_MakePendingCalls(void)

{

assert(PyGILState_Check());

PyThreadState *tstate = _PyThreadState_GET();

/* Python signal handler doesn't really queue a callback: it only signals

int res = handle_signals(tstate);

if (res != 0) {

return res;

}

res = make_pending_calls(tstate);

if (res != 0) {

return res;

}

return 0;

}

#ifndef Py_DEFAULT_RECURSION_LIMIT

#define Py_DEFAULT_RECURSION_LIMIT 1000

int _Py_CheckRecursionLimit = Py_DEFAULT_RECURSION_LIMIT;

_PyEval_InitRuntimeState(struct _ceval_runtime_state *ceval)

{

_Py_CheckRecursionLimit = Py_DEFAULT_RECURSION_LIMIT;

_gil_initialize(&ceval->gil);

}

_PyEval_InitState(struct _ceval_state *ceval)

{

ceval->recursion_limit = Py_DEFAULT_RECURSION_LIMIT;

struct _pending_calls *pending = &ceval->pending;

assert(pending->lock == NULL);

pending->lock = PyThread_allocate_lock();

if (pending->lock == NULL) {

return -1;

}

return 0;

}

_PyEval_FiniState(struct _ceval_state *ceval)

{

struct _pending_calls *pending = &ceval->pending;

if (pending->lock != NULL) {

PyThread_free_lock(pending->lock);

pending->lock = NULL;

}

}

Py_GetRecursionLimit(void)

{

PyThreadState *tstate = _PyThreadState_GET();

return tstate->interp->ceval.recursion_limit;

}

Py_SetRecursionLimit(int new_limit)

{

PyThreadState *tstate = _PyThreadState_GET();

tstate->interp->ceval.recursion_limit = new_limit;

if (_Py_IsMainInterpreter(tstate)) {

_Py_CheckRecursionLimit = new_limit;

}

}

_Py_CheckRecursiveCall(PyThreadState *tstate, const char *where)

{

int recursion_limit = tstate->interp->ceval.recursion_limit;

#ifdef USE_STACKCHECK

tstate->stackcheck_counter = 0;

if (PyOS_CheckStack()) {

--tstate->recursion_depth;

_PyErr_SetString(tstate, PyExc_MemoryError, "Stack overflow");

return -1;

}

if (_Py_IsMainInterpreter(tstate)) {

/* Needed for ABI backwards-compatibility (see bpo-31857) */

_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 || tstate->overflowed > 50) {

/* Overflowing while handling an overflow. Give up. */

Py_FatalError("Cannot recover from stack overflow.");

}

}

else {

if (tstate->recursion_depth > recursion_limit) {

tstate->overflowed++;

_PyErr_Format(tstate, PyExc_RecursionError,

"maximum recursion depth exceeded%s",

where);

tstate->overflowed--;

--tstate->recursion_depth;

return -1;

}

}

return 0;

}

static int do_raise(PyThreadState *tstate, PyObject *exc, PyObject *cause);

static int unpack_iterable(PyThreadState *, PyObject *, int, int, PyObject **);

#define _Py_TracingPossible(ceval) ((ceval)->tracing_possible)

PyObject *

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

{

return PyEval_EvalCodeEx(co,

globals, locals,

(PyObject **)NULL, 0,

(PyObject **)NULL, 0,

(PyObject **)NULL, 0,

NULL, NULL);

}

PyObject *

PyEval_EvalFrame(PyFrameObject *f)

{

/* Function kept for backward compatibility */

PyThreadState *tstate = _PyThreadState_GET();

return _PyEval_EvalFrame(tstate, f, 0);

}

PyObject *

PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)

{

PyThreadState *tstate = _PyThreadState_GET();

return _PyEval_EvalFrame(tstate, f, throwflag);

}

static int

eval_frame_handle_pending(PyThreadState *tstate)

{

_PyRuntimeState * const runtime = &_PyRuntime;

struct _ceval_runtime_state *ceval = &runtime->ceval;

/* Pending signals */

if (_Py_atomic_load_relaxed(&ceval->signals_pending)) {

if (handle_signals(tstate) != 0) {

return -1;

}

}

/* Pending calls */

struct _ceval_state *ceval2 = &tstate->interp->ceval;

if (_Py_atomic_load_relaxed(&ceval2->pending.calls_to_do)) {

if (make_pending_calls(tstate) != 0) {

return -1;

}

}

/* GIL drop request */

if (_Py_atomic_load_relaxed(&ceval2->gil_drop_request)) {

/* Give another thread a chance */

if (_PyThreadState_Swap(&runtime->gilstate, NULL) != tstate) {

Py_FatalError("tstate mix-up");

}

drop_gil(ceval, ceval2, tstate);

/* Other threads may run now */

take_gil(tstate);

if (_PyThreadState_Swap(&runtime->gilstate, tstate) != NULL) {

Py_FatalError("orphan tstate");

}

}

/* Check for asynchronous exception. */

if (tstate->async_exc != NULL) {

PyObject *exc = tstate->async_exc;

tstate->async_exc = NULL;

UNSIGNAL_ASYNC_EXC(tstate->interp);

_PyErr_SetNone(tstate, exc);

Py_DECREF(exc);

return -1;

}

#ifdef MS_WINDOWS

// bpo-42296: On Windows, _PyEval_SignalReceived() can be called in a

// different thread than the Python thread, in which case

// _Py_ThreadCanHandleSignals() is wrong. Recompute eval_breaker in the

// current Python thread with the correct _Py_ThreadCanHandleSignals()

// value. It prevents to interrupt the eval loop at every instruction if

// the current Python thread cannot handle signals (if

// _Py_ThreadCanHandleSignals() is false).

COMPUTE_EVAL_BREAKER(tstate->interp, ceval, ceval2);

return 0;

}

PyObject* _Py_HOT_FUNCTION

_PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)

{

_Py_EnsureTstateNotNULL(tstate);

#ifdef DXPAIRS

int lastopcode = 0;

PyObject **stack_pointer; /* Next free slot in value stack */

const _Py_CODEUNIT *next_instr;

int opcode; /* Current opcode */

int oparg; /* Current opcode argument, if any */

PyObject **fastlocals, **freevars;

PyObject *retval = NULL; /* Return value */

struct _ceval_state * const ceval2 = &tstate->interp->ceval;

_Py_atomic_int * const eval_breaker = &ceval2->eval_breaker;

PyCodeObject *co;

/* when tracing we set things up so that

int instr_ub = -1, instr_lb = 0, instr_prev = -1;

const _Py_CODEUNIT *first_instr;

PyObject *names;

PyObject *consts;

_PyOpcache *co_opcache;

#ifdef LLTRACE

_Py_IDENTIFIER(__ltrace__);

#ifdef DYNAMIC_EXECUTION_PROFILE

#undef USE_COMPUTED_GOTOS

#define USE_COMPUTED_GOTOS 0

#ifdef HAVE_COMPUTED_GOTOS

#ifndef USE_COMPUTED_GOTOS