blob: 1873e37cf608e88e93b2351b37aa906fc71e75df [file] [log] [blame]
/* Execute compiled code */
/* XXX TO DO:
XXX speed up searching for keywords by using a dictionary
XXX document it!
*/
/* enable more aggressive intra-module optimizations, where available */
#define PY_LOCAL_AGGRESSIVE
#include "Python.h"
#include "pycore_ceval.h"
#include "pycore_code.h"
#include "pycore_object.h"
#include "pycore_pyerrors.h"
#include "pycore_pylifecycle.h"
#include "pycore_pystate.h"
#include "pycore_tupleobject.h"
#include "code.h"
#include "dictobject.h"
#include "frameobject.h"
#include "opcode.h"
#include "pydtrace.h"
#include "setobject.h"
#include "structmember.h"
#include <ctype.h>
#ifdef Py_DEBUG
/* For debugging the interpreter: */
#define LLTRACE 1 /* Low-level trace feature */
#define CHECKEXC 1 /* Double-check exception checking */
#endif
#if !defined(Py_BUILD_CORE)
# error "ceval.c must be build with Py_BUILD_CORE define for best performance"
#endif
/* Private API for the LOAD_METHOD opcode. */
extern int _PyObject_GetMethod(PyObject *, PyObject *, PyObject **);
typedef PyObject *(*callproc)(PyObject *, PyObject *, PyObject *);
/* Forward declarations */
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 *);
#endif
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 * cmp_outcome(PyThreadState *, int, PyObject *, PyObject *);
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);
#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"
/* Dynamic execution profile */
#ifdef DYNAMIC_EXECUTION_PROFILE
#ifdef DXPAIRS
static long dxpairs[257][256];
#define dxp dxpairs[256]
#else
static long dxp[256];
#endif
#endif
/* per opcode cache */
#ifdef Py_DEBUG
// --with-pydebug is used to find memory leak. opcache makes it harder.
// So we disable opcache when Py_DEBUG is defined.
// See bpo-37146
#define OPCACHE_MIN_RUNS 0 /* disable opcache */
#else
#define OPCACHE_MIN_RUNS 1024 /* create opcache when code executed this time */
#endif
#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;
#endif
#define GIL_REQUEST _Py_atomic_load_relaxed(&ceval->gil_drop_request)
/* This can set eval_breaker to 0 even though gil_drop_request became
1. We believe this is all right because the eval loop will release
the GIL eventually anyway. */
#define COMPUTE_EVAL_BREAKER(ceval) \
_Py_atomic_store_relaxed( \
&(ceval)->eval_breaker, \
GIL_REQUEST | \
_Py_atomic_load_relaxed(&(ceval)->signals_pending) | \
_Py_atomic_load_relaxed(&(ceval)->pending.calls_to_do) | \
(ceval)->pending.async_exc)
#define SET_GIL_DROP_REQUEST(ceval) \
do { \
_Py_atomic_store_relaxed(&(ceval)->gil_drop_request, 1); \
_Py_atomic_store_relaxed(&(ceval)->eval_breaker, 1); \
} while (0)
#define RESET_GIL_DROP_REQUEST(ceval) \
do { \
_Py_atomic_store_relaxed(&(ceval)->gil_drop_request, 0); \
COMPUTE_EVAL_BREAKER(ceval); \
} while (0)
/* Pending calls are only modified under pending_lock */
#define SIGNAL_PENDING_CALLS(ceval) \
do { \
_Py_atomic_store_relaxed(&(ceval)->pending.calls_to_do, 1); \
_Py_atomic_store_relaxed(&(ceval)->eval_breaker, 1); \
} while (0)
#define UNSIGNAL_PENDING_CALLS(ceval) \
do { \
_Py_atomic_store_relaxed(&(ceval)->pending.calls_to_do, 0); \
COMPUTE_EVAL_BREAKER(ceval); \
} while (0)
#define SIGNAL_PENDING_SIGNALS(ceval) \
do { \
_Py_atomic_store_relaxed(&(ceval)->signals_pending, 1); \
_Py_atomic_store_relaxed(&(ceval)->eval_breaker, 1); \
} while (0)
#define UNSIGNAL_PENDING_SIGNALS(ceval) \
do { \
_Py_atomic_store_relaxed(&(ceval)->signals_pending, 0); \
COMPUTE_EVAL_BREAKER(ceval); \
} while (0)
#define SIGNAL_ASYNC_EXC(ceval) \
do { \
(ceval)->pending.async_exc = 1; \
_Py_atomic_store_relaxed(&(ceval)->eval_breaker, 1); \
} while (0)
#define UNSIGNAL_ASYNC_EXC(ceval) \
do { \
(ceval)->pending.async_exc = 0; \
COMPUTE_EVAL_BREAKER(ceval); \
} while (0)
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include "pythread.h"
#include "ceval_gil.h"
int
PyEval_ThreadsInitialized(void)
{
return gil_created(&_PyRuntime.ceval.gil);
}
void
PyEval_InitThreads(void)
{
_PyRuntimeState *runtime = &_PyRuntime;
struct _ceval_runtime_state *ceval = &runtime->ceval;
struct _gil_runtime_state *gil = &ceval->gil;
if (gil_created(gil)) {
return;
}
PyThread_init_thread();
create_gil(gil);
PyThreadState *tstate = _PyRuntimeState_GetThreadState(runtime);
take_gil(ceval, tstate);
struct _pending_calls *pending = &ceval->pending;
pending->lock = PyThread_allocate_lock();
if (pending->lock == NULL) {
Py_FatalError("Can't initialize threads for pending calls");
}
}
void
_PyEval_FiniThreads(struct _ceval_runtime_state *ceval)
{
struct _gil_runtime_state *gil = &ceval->gil;
if (!gil_created(gil)) {
return;
}
destroy_gil(gil);
assert(!gil_created(gil));
struct _pending_calls *pending = &ceval->pending;
if (pending->lock != NULL) {
PyThread_free_lock(pending->lock);
pending->lock = NULL;
}
}
static inline void
exit_thread_if_finalizing(_PyRuntimeState *runtime, PyThreadState *tstate)
{
/* _Py_Finalizing is protected by the GIL */
if (runtime->finalizing != NULL && !_Py_CURRENTLY_FINALIZING(runtime, tstate)) {
drop_gil(&runtime->ceval, tstate);
PyThread_exit_thread();
}
}
void
_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");
#endif
}
void
PyEval_AcquireLock(void)
{
_PyRuntimeState *runtime = &_PyRuntime;
struct _ceval_runtime_state *ceval = &runtime->ceval;
PyThreadState *tstate = _PyRuntimeState_GetThreadState(runtime);
if (tstate == NULL) {
Py_FatalError("PyEval_AcquireLock: current thread state is NULL");
}
take_gil(ceval, tstate);
exit_thread_if_finalizing(runtime, tstate);
}
void
PyEval_ReleaseLock(void)
{
_PyRuntimeState *runtime = &_PyRuntime;
PyThreadState *tstate = _PyRuntimeState_GetThreadState(runtime);
/* This function must succeed when the current thread state is NULL.
We therefore avoid PyThreadState_Get() which dumps a fatal error
in debug mode.
*/
drop_gil(&runtime->ceval, tstate);
}
void
PyEval_AcquireThread(PyThreadState *tstate)
{
if (tstate == NULL) {
Py_FatalError("PyEval_AcquireThread: NULL new thread state");
}
_PyRuntimeState *runtime = &_PyRuntime;
struct _ceval_runtime_state *ceval = &runtime->ceval;
/* Check someone has called PyEval_InitThreads() to create the lock */
assert(gil_created(&ceval->gil));
take_gil(ceval, tstate);
exit_thread_if_finalizing(runtime, tstate);
if (_PyThreadState_Swap(&runtime->gilstate, tstate) != NULL) {
Py_FatalError("PyEval_AcquireThread: non-NULL old thread state");
}
}
void
PyEval_ReleaseThread(PyThreadState *tstate)
{
if (tstate == NULL) {
Py_FatalError("PyEval_ReleaseThread: NULL thread state");
}
_PyRuntimeState *runtime = &_PyRuntime;
PyThreadState *new_tstate = _PyThreadState_Swap(&runtime->gilstate, NULL);
if (new_tstate != tstate) {
Py_FatalError("PyEval_ReleaseThread: wrong thread state");
}
drop_gil(&runtime->ceval, tstate);
}
/* This function is called from PyOS_AfterFork_Child to destroy all threads
* which are not running in the child process, and clear internal locks
* which might be held by those threads.
*/
void
_PyEval_ReInitThreads(_PyRuntimeState *runtime)
{
struct _ceval_runtime_state *ceval = &runtime->ceval;
if (!gil_created(&ceval->gil)) {
return;
}
recreate_gil(&ceval->gil);
PyThreadState *current_tstate = _PyRuntimeState_GetThreadState(runtime);
take_gil(ceval, current_tstate);
struct _pending_calls *pending = &ceval->pending;
pending->lock = PyThread_allocate_lock();
if (pending->lock == NULL) {
Py_FatalError("Can't initialize threads for pending calls");
}
/* Destroy all threads except the current one */
_PyThreadState_DeleteExcept(runtime, current_tstate);
}
/* This function is used to signal that async exceptions are waiting to be
raised. */
void
_PyEval_SignalAsyncExc(struct _ceval_runtime_state *ceval)
{
SIGNAL_ASYNC_EXC(ceval);
}
PyThreadState *
PyEval_SaveThread(void)
{
_PyRuntimeState *runtime = &_PyRuntime;
struct _ceval_runtime_state *ceval = &runtime->ceval;
PyThreadState *tstate = _PyThreadState_Swap(&runtime->gilstate, NULL);
if (tstate == NULL) {
Py_FatalError("PyEval_SaveThread: NULL tstate");
}
assert(gil_created(&ceval->gil));
drop_gil(ceval, tstate);
return tstate;
}
void
PyEval_RestoreThread(PyThreadState *tstate)
{
_PyRuntimeState *runtime = &_PyRuntime;
struct _ceval_runtime_state *ceval = &runtime->ceval;
if (tstate == NULL) {
Py_FatalError("PyEval_RestoreThread: NULL tstate");
}
assert(gil_created(&ceval->gil));
int err = errno;
take_gil(ceval, tstate);
exit_thread_if_finalizing(runtime, tstate);
errno = err;
_PyThreadState_Swap(&runtime->gilstate, tstate);
}
/* Mechanism whereby asynchronously executing callbacks (e.g. UNIX
signal handlers or Mac I/O completion routines) can schedule calls
to a function to be called synchronously.
The synchronous function is called with one void* argument.
It should return 0 for success or -1 for failure -- failure should
be accompanied by an exception.
If registry succeeds, the registry function returns 0; if it fails
(e.g. due to too many pending calls) it returns -1 (without setting
an exception condition).
Note that because registry may occur from within signal handlers,
or other asynchronous events, calling malloc() is unsafe!
Any thread can schedule pending calls, but only the main thread
will execute them.
There is no facility to schedule calls to a particular thread, but
that should be easy to change, should that ever be required. In
that case, the static variables here should go into the python
threadstate.
*/
void
_PyEval_SignalReceived(struct _ceval_runtime_state *ceval)
{
/* bpo-30703: Function called when the C signal handler of Python gets a
signal. We cannot queue a callback using Py_AddPendingCall() since
that function is not async-signal-safe. */
SIGNAL_PENDING_SIGNALS(ceval);
}
/* Push one item onto the queue while holding the lock. */
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;
}
/* Pop one item off the queue while holding the lock. */
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;
}
/* This implementation is thread-safe. It allows
scheduling to be made from any thread, and even from an executing
callback.
*/
int
_PyEval_AddPendingCall(PyThreadState *tstate,
struct _ceval_runtime_state *ceval,
int (*func)(void *), void *arg)
{
struct _pending_calls *pending = &ceval->pending;
PyThread_acquire_lock(pending->lock, WAIT_LOCK);
if (pending->finishing) {
PyThread_release_lock(pending->lock);
PyObject *exc, *val, *tb;
_PyErr_Fetch(tstate, &exc, &val, &tb);
_PyErr_SetString(tstate, PyExc_SystemError,
"Py_AddPendingCall: cannot add pending calls "
"(Python shutting down)");
_PyErr_Print(tstate);
_PyErr_Restore(tstate, exc, val, tb);
return -1;
}
int result = _push_pending_call(pending, func, arg);
PyThread_release_lock(pending->lock);
/* signal main loop */
SIGNAL_PENDING_CALLS(ceval);
return result;
}
int
Py_AddPendingCall(int (*func)(void *), void *arg)
{
_PyRuntimeState *runtime = &_PyRuntime;
PyThreadState *tstate = _PyRuntimeState_GetThreadState(runtime);
return _PyEval_AddPendingCall(tstate, &runtime->ceval, func, arg);
}
static int
handle_signals(_PyRuntimeState *runtime)
{
/* Only handle signals on main thread. PyEval_InitThreads must
* have been called already.
*/
if (PyThread_get_thread_ident() != runtime->main_thread) {
return 0;
}
/*
* Ensure that the thread isn't currently running some other
* interpreter.
*/
PyInterpreterState *interp = _PyRuntimeState_GetThreadState(runtime)->interp;
if (interp != runtime->interpreters.main) {
return 0;
}
struct _ceval_runtime_state *ceval = &runtime->ceval;
UNSIGNAL_PENDING_SIGNALS(ceval);
if (_PyErr_CheckSignals() < 0) {
SIGNAL_PENDING_SIGNALS(ceval); /* We're not done yet */
return -1;
}
return 0;
}
static int
make_pending_calls(_PyRuntimeState *runtime)
{
static int busy = 0;
/* only service pending calls on main thread */
if (PyThread_get_thread_ident() != runtime->main_thread) {
return 0;
}
/* don't perform recursive pending calls */
if (busy) {
return 0;
}
busy = 1;
struct _ceval_runtime_state *ceval = &runtime->ceval;
/* unsignal before starting to call callbacks, so that any callback
added in-between re-signals */
UNSIGNAL_PENDING_CALLS(ceval);
int res = 0;
/* perform a bounded number of calls, in case of recursion */
struct _pending_calls *pending = &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(ceval);
return res;
}
void
_Py_FinishPendingCalls(_PyRuntimeState *runtime)
{
assert(PyGILState_Check());
PyThreadState *tstate = _PyRuntimeState_GetThreadState(runtime);
struct _pending_calls *pending = &runtime->ceval.pending;
PyThread_acquire_lock(pending->lock, WAIT_LOCK);
pending->finishing = 1;
PyThread_release_lock(pending->lock);
if (!_Py_atomic_load_relaxed(&(pending->calls_to_do))) {
return;
}
if (make_pending_calls(runtime) < 0) {
PyObject *exc, *val, *tb;
_PyErr_Fetch(tstate, &exc, &val, &tb);
PyErr_BadInternalCall();
_PyErr_ChainExceptions(exc, val, tb);
_PyErr_Print(tstate);
}
}
/* Py_MakePendingCalls() is a simple wrapper for the sake
of backward-compatibility. */
int
Py_MakePendingCalls(void)
{
assert(PyGILState_Check());
/* Python signal handler doesn't really queue a callback: it only signals
that a signal was received, see _PyEval_SignalReceived(). */
_PyRuntimeState *runtime = &_PyRuntime;
int res = handle_signals(runtime);
if (res != 0) {
return res;
}
res = make_pending_calls(runtime);
if (res != 0) {
return res;
}
return 0;
}
/* The interpreter's recursion limit */
#ifndef Py_DEFAULT_RECURSION_LIMIT
#define Py_DEFAULT_RECURSION_LIMIT 1000
#endif
int _Py_CheckRecursionLimit = Py_DEFAULT_RECURSION_LIMIT;
void
_PyEval_Initialize(struct _ceval_runtime_state *state)
{
state->recursion_limit = Py_DEFAULT_RECURSION_LIMIT;
_Py_CheckRecursionLimit = Py_DEFAULT_RECURSION_LIMIT;
_gil_initialize(&state->gil);
}
int
Py_GetRecursionLimit(void)
{
return _PyRuntime.ceval.recursion_limit;
}
void
Py_SetRecursionLimit(int new_limit)
{
struct _ceval_runtime_state *ceval = &_PyRuntime.ceval;
ceval->recursion_limit = new_limit;
_Py_CheckRecursionLimit = ceval->recursion_limit;
}
/* the macro Py_EnterRecursiveCall() only calls _Py_CheckRecursiveCall()
if the recursion_depth reaches _Py_CheckRecursionLimit.
If USE_STACKCHECK, the macro decrements _Py_CheckRecursionLimit
to guarantee that _Py_CheckRecursiveCall() is regularly called.
Without USE_STACKCHECK, there is no need for this. */
int
_Py_CheckRecursiveCall(const char *where)
{
_PyRuntimeState *runtime = &_PyRuntime;
PyThreadState *tstate = _PyRuntimeState_GetThreadState(runtime);
int recursion_limit = runtime->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;
}
/* Needed for ABI backwards-compatibility (see bpo-31857) */
_Py_CheckRecursionLimit = recursion_limit;
#endif
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(tstate, PyExc_RecursionError,
"maximum recursion depth exceeded%s",
where);
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);
}
/* Interpreter main loop */
PyObject *
PyEval_EvalFrame(PyFrameObject *f) {
/* This is for backward compatibility with extension modules that
used this API; core interpreter code should call
PyEval_EvalFrameEx() */
return PyEval_EvalFrameEx(f, 0);
}
PyObject *
PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
{
PyInterpreterState *interp = _PyInterpreterState_GET_UNSAFE();
return interp->eval_frame(f, throwflag);
}
PyObject* _Py_HOT_FUNCTION
_PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
{
#ifdef DXPAIRS
int lastopcode = 0;
#endif
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 */
_PyRuntimeState * const runtime = &_PyRuntime;
PyThreadState * const tstate = _PyRuntimeState_GetThreadState(runtime);
struct _ceval_runtime_state * const ceval = &runtime->ceval;
_Py_atomic_int * const eval_breaker = &ceval->eval_breaker;
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;
const _Py_CODEUNIT *first_instr;
PyObject *names;
PyObject *consts;
_PyOpcache *co_opcache;
#ifdef LLTRACE
_Py_IDENTIFIER(__ltrace__);
#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"
#define TARGET(op) \
op: \
TARGET_##op
#ifdef LLTRACE
#define FAST_DISPATCH() \
{ \
if (!lltrace && !_Py_TracingPossible(ceval) && !PyDTrace_LINE_ENABLED()) { \
f->f_lasti = INSTR_OFFSET(); \
NEXTOPARG(); \
goto *opcode_targets[opcode]; \
} \
goto fast_next_opcode; \
}
#else
#define FAST_DISPATCH() \
{ \
if (!_Py_TracingPossible(ceval) && !PyDTrace_LINE_ENABLED()) { \
f->f_lasti = INSTR_OFFSET(); \
NEXTOPARG(); \
goto *opcode_targets[opcode]; \
} \
goto fast_next_opcode; \
}
#endif
#define DISPATCH() \
{ \
if (!_Py_atomic_load_relaxed(eval_breaker)) { \
FAST_DISPATCH(); \
} \
continue; \
}
#else
#define TARGET(op) op
#define FAST_DISPATCH() goto fast_next_opcode
#define DISPATCH() continue
#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
/* Code access macros */
/* The integer overflow is checked by an assertion below. */
#define INSTR_OFFSET() \
(sizeof(_Py_CODEUNIT) * (int)(next_instr - first_instr))
#define NEXTOPARG() do { \
_Py_CODEUNIT word = *next_instr; \
opcode = _Py_OPCODE(word); \
oparg = _Py_OPARG(word); \
next_instr++; \
} while (0)
#define JUMPTO(x) (next_instr = first_instr + (x) / sizeof(_Py_CODEUNIT))
#define JUMPBY(x) (next_instr += (x) / sizeof(_Py_CODEUNIT))
/* 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 POP_JUMP_IF_FALSE or POP_JUMP_IF_TRUE.
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 unpredictable switch-case branch. 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
#else
#define PREDICT(op) \
do{ \
_Py_CODEUNIT word = *next_instr; \
opcode = _Py_OPCODE(word); \
if (opcode == op){ \
oparg = _Py_OPARG(word); \
next_instr++; \
goto PRED_##op; \
} \
} while(0)
#endif
#define PREDICTED(op) PRED_##op:
/* 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(tstate, TOP(), "push")); \
assert(STACK_LEVEL() <= co->co_stacksize); }
#define POP() ((void)(lltrace && prtrace(tstate, TOP(), "pop")), \
BASIC_POP())
#define STACK_GROW(n) do { \
assert(n >= 0); \
(void)(BASIC_STACKADJ(n), \
lltrace && prtrace(tstate, TOP(), "stackadj")); \
assert(STACK_LEVEL() <= co->co_stacksize); \
} while (0)
#define STACK_SHRINK(n) do { \
assert(n >= 0); \
(void)(lltrace && prtrace(tstate, TOP(), "stackadj")); \
(void)(BASIC_STACKADJ(-n)); \
assert(STACK_LEVEL() <= co->co_stacksize); \
} while (0)
#define EXT_POP(STACK_POINTER) ((void)(lltrace && \
prtrace(tstate, (STACK_POINTER)[-1], "ext_pop")), \
*--(STACK_POINTER))
#else
#define PUSH(v) BASIC_PUSH(v)
#define POP() BASIC_POP()
#define STACK_GROW(n) BASIC_STACKADJ(n)
#define STACK_SHRINK(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) \
do { \
PyObject *type, *value, *traceback; \
_PyErr_StackItem *exc_info; \
assert(STACK_LEVEL() >= (b)->b_level + 3); \
while (STACK_LEVEL() > (b)->b_level + 3) { \
value = POP(); \
Py_XDECREF(value); \
} \
exc_info = tstate->exc_info; \
type = exc_info->exc_type; \
value = exc_info->exc_value; \
traceback = exc_info->exc_traceback; \
exc_info->exc_type = POP(); \
exc_info->exc_value = POP(); \
exc_info->exc_traceback = POP(); \
Py_XDECREF(type); \
Py_XDECREF(value); \
Py_XDECREF(traceback); \
} while(0)
/* macros for opcode cache */
#define OPCACHE_CHECK() \
do { \
co_opcache = NULL; \
if (co->co_opcache != NULL) { \
unsigned char co_opt_offset = \
co->co_opcache_map[next_instr - first_instr]; \
if (co_opt_offset > 0) { \
assert(co_opt_offset <= co->co_opcache_size); \
co_opcache = &co->co_opcache[co_opt_offset - 1]; \
assert(co_opcache != NULL); \
} \
} \
} while (0)
#if OPCACHE_STATS
#define OPCACHE_STAT_GLOBAL_HIT() \
do { \
if (co->co_opcache != NULL) opcache_global_hits++; \
} while (0)
#define OPCACHE_STAT_GLOBAL_MISS() \
do { \
if (co->co_opcache != NULL) opcache_global_misses++; \
} while (0)
#define OPCACHE_STAT_GLOBAL_OPT() \
do { \
if (co->co_opcache != NULL) opcache_global_opts++; \
} while (0)
#else /* OPCACHE_STATS */
#define OPCACHE_STAT_GLOBAL_HIT()
#define OPCACHE_STAT_GLOBAL_MISS()
#define OPCACHE_STAT_GLOBAL_OPT()
#endif
/* Start of code */
/* 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,
tstate, 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,
tstate, f, PyTrace_CALL, Py_None)) {
/* Profile function raised an error */
goto exit_eval_frame;
}
}
}
if (PyDTrace_FUNCTION_ENTRY_ENABLED())
dtrace_function_entry(f);
co = f->f_code;
names = co->co_names;
consts = co->co_consts;
fastlocals = f->f_localsplus;
freevars = f->f_localsplus + co->co_nlocals;
assert(PyBytes_Check(co->co_code));
assert(PyBytes_GET_SIZE(co->co_code) <= INT_MAX);
assert(PyBytes_GET_SIZE(co->co_code) % sizeof(_Py_CODEUNIT) == 0);
assert(_Py_IS_ALIGNED(PyBytes_AS_STRING(co->co_code), sizeof(_Py_CODEUNIT)));
first_instr = (_Py_CODEUNIT *) PyBytes_AS_STRING(co->co_code);
/*
f->f_lasti refers to the index of the last instruction,
unless it's -1 in which case next_instr should be first_instr.
YIELD_FROM sets f_lasti to itself, in order to repeatedly yield
multiple values.
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
to the beginning of the combined pair.)
*/
assert(f->f_lasti >= -1);
next_instr = first_instr;
if (f->f_lasti >= 0) {
assert(f->f_lasti % sizeof(_Py_CODEUNIT) == 0);
next_instr += f->f_lasti / sizeof(_Py_CODEUNIT) + 1;
}
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_opcache_flag < OPCACHE_MIN_RUNS) {
co->co_opcache_flag++;
if (co->co_opcache_flag == OPCACHE_MIN_RUNS) {
if (_PyCode_InitOpcache(co) < 0) {
goto exit_eval_frame;
}
#if OPCACHE_STATS
opcache_code_objects_extra_mem +=
PyBytes_Size(co->co_code) / sizeof(_Py_CODEUNIT) +
sizeof(_PyOpcache) * co->co_opcache_size;
opcache_code_objects++;
#endif
}
}
#ifdef LLTRACE
lltrace = _PyDict_GetItemId(f->f_globals, &PyId___ltrace__) != NULL;
#endif
if (throwflag) /* support for generator.throw() */
goto error;
#ifdef Py_DEBUG
/* PyEval_EvalFrameEx() must not be called with an exception set,
because it can clear it (directly or indirectly) and so the
caller loses its exception */
assert(!_PyErr_Occurred(tstate));
#endif
main_loop:
for (;;) {
assert(stack_pointer >= f->f_valuestack); /* else underflow */
assert(STACK_LEVEL() <= co->co_stacksize); /* else overflow */
assert(!_PyErr_Occurred(tstate));
/* 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)) {
opcode = _Py_OPCODE(*next_instr);
if (opcode == SETUP_FINALLY ||
opcode == SETUP_WITH ||
opcode == BEFORE_ASYNC_WITH ||
opcode == YIELD_FROM) {
/* Few cases where we skip running signal handlers and other
pending calls:
- If we're about to enter the 'with:'. It will prevent
emitting a resource warning in the common idiom
'with open(path) as file:'.
- If we're about to enter the 'async with:'.
- If we're about to enter the 'try:' of a try/finally (not
*very* useful, but might help in some cases and it's
traditional)
- If we're resuming a chain of nested 'yield from' or
'await' calls, then each frame is parked with YIELD_FROM
as its next opcode. If the user hit control-C we want to
wait until we've reached the innermost frame before
running the signal handler and raising KeyboardInterrupt
(see bpo-30039).
*/
goto fast_next_opcode;
}
if (_Py_atomic_load_relaxed(&ceval->signals_pending)) {
if (handle_signals(runtime) != 0) {
goto error;
}
}
if (_Py_atomic_load_relaxed(&ceval->pending.calls_to_do)) {
if (make_pending_calls(runtime) != 0) {
goto error;
}
}
if (_Py_atomic_load_relaxed(&ceval->gil_drop_request)) {
/* Give another thread a chance */
if (_PyThreadState_Swap(&runtime->gilstate, NULL) != tstate) {
Py_FatalError("ceval: tstate mix-up");
}
drop_gil(ceval, tstate);
/* Other threads may run now */
take_gil(ceval, tstate);
/* Check if we should make a quick exit. */
exit_thread_if_finalizing(runtime, tstate);
if (_PyThreadState_Swap(&runtime->gilstate, tstate) != NULL) {
Py_FatalError("ceval: orphan tstate");
}
}
/* Check for asynchronous exceptions. */
if (tstate->async_exc != NULL) {
PyObject *exc = tstate->async_exc;
tstate->async_exc = NULL;
UNSIGNAL_ASYNC_EXC(ceval);
_PyErr_SetNone(tstate, exc);
Py_DECREF(exc);
goto error;
}
}
fast_next_opcode:
f->f_lasti = INSTR_OFFSET();
if (PyDTrace_LINE_ENABLED())
maybe_dtrace_line(f, &instr_lb, &instr_ub, &instr_prev);
/* line-by-line tracing support */
if (_Py_TracingPossible(ceval) &&
tstate->c_tracefunc != NULL && !tstate->tracing) {
int err;
/* see maybe_call_line_trace
for expository comments */
f->f_stacktop = stack_pointer;
err = maybe_call_line_trace(tstate->c_tracefunc,
tstate->c_traceobj,
tstate, 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 error;
}
/* Extract opcode and argument */
NEXTOPARG();
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
switch (opcode) {
/* BEWARE!
It is essential that any operation that fails must goto error
and that all operation that succeed call [FAST_]DISPATCH() ! */
case TARGET(NOP): {
FAST_DISPATCH();
}
case TARGET(LOAD_FAST): {
PyObject *value = GETLOCAL(oparg);
if (value == NULL) {
format_exc_check_arg(tstate, PyExc_UnboundLocalError,
UNBOUNDLOCAL_ERROR_MSG,
PyTuple_GetItem(co->co_varnames, oparg));
goto error;
}
Py_INCREF(value);
PUSH(value);
FAST_DISPATCH();
}
case TARGET(LOAD_CONST): {
PREDICTED(LOAD_CONST);
PyObject *value = GETITEM(consts, oparg);
Py_INCREF(value);
PUSH(value);
FAST_DISPATCH();
}
case TARGET(STORE_FAST): {
PREDICTED(STORE_FAST);
PyObject *value = POP();
SETLOCAL(oparg, value);
FAST_DISPATCH();
}
case TARGET(POP_TOP): {
PyObject *value = POP();
Py_DECREF(value);
FAST_DISPATCH();
}
case TARGET(ROT_TWO): {
PyObject *top = TOP();
PyObject *second = SECOND();
SET_TOP(second);
SET_SECOND(top);
FAST_DISPATCH();
}
case TARGET(ROT_THREE): {
PyObject *top = TOP();
PyObject *second = SECOND();
PyObject *third = THIRD();
SET_TOP(second);
SET_SECOND(third);
SET_THIRD(top);
FAST_DISPATCH();
}
case TARGET(ROT_FOUR): {
PyObject *top = TOP();
PyObject *second = SECOND();
PyObject *third = THIRD();
PyObject *fourth = FOURTH();
SET_TOP(second);
SET_SECOND(third);
SET_THIRD(fourth);
SET_FOURTH(top);
FAST_DISPATCH();
}
case TARGET(DUP_TOP): {
PyObject *top = TOP();
Py_INCREF(top);
PUSH(top);
FAST_DISPATCH();
}
case TARGET(DUP_TOP_TWO): {
PyObject *top = TOP();
PyObject *second = SECOND();
Py_INCREF(top);
Py_INCREF(second);
STACK_GROW(2);
SET_TOP(top);
SET_SECOND(second);
FAST_DISPATCH();
}
case TARGET(UNARY_POSITIVE): {
PyObject *value = TOP();
PyObject *res = PyNumber_Positive(value);
Py_DECREF(value);
SET_TOP(res);
if (res == NULL)
goto error;
DISPATCH();
}
case TARGET(UNARY_NEGATIVE): {
PyObject *value = TOP();
PyObject *res = PyNumber_Negative(value);
Py_DECREF(value);
SET_TOP(res);
if (res == NULL)
goto error;
DISPATCH();
}
case 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);
DISPATCH();
}
else if (err > 0) {
Py_INCREF(Py_False);
SET_TOP(Py_False);
DISPATCH();
}
STACK_SHRINK(1);
goto error;
}
case TARGET(UNARY_INVERT): {
PyObject *value = TOP();
PyObject *res = PyNumber_Invert(value);
Py_DECREF(value);
SET_TOP(res);
if (res == NULL)
goto error;
DISPATCH();
}
case 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();
}
case 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();
}
case TARGET(BINARY_MATRIX_MULTIPLY): {
PyObject *right = POP();
PyObject *left = TOP();
PyObject *res = PyNumber_MatrixMultiply(left, right);
Py_DECREF(left);
Py_DECREF(right);
SET_TOP(res);
if (res == NULL)
goto error;
DISPATCH();
}
case 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();
}
case 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();
}
case TARGET(BINARY_MODULO): {
PyObject *divisor = POP();
PyObject *dividend = TOP();
PyObject *res;
if (PyUnicode_CheckExact(dividend) && (
!PyUnicode_Check(divisor) || PyUnicode_CheckExact(divisor))) {
// fast path; string formatting, but not if the RHS is a str subclass
// (see issue28598)
res = PyUnicode_Format(dividend, divisor);
} else {
res = PyNumber_Remainder(dividend, divisor);
}
Py_DECREF(divisor);
Py_DECREF(dividend);
SET_TOP(res);
if (res == NULL)
goto error;
DISPATCH();
}
case TARGET(BINARY_ADD): {
PyObject *right = POP();
PyObject *left = TOP();
PyObject *sum;
/* NOTE(haypo): Please don't try to micro-optimize int+int on
CPython using bytecode, it is simply worthless.
See http://bugs.python.org/issue21955 and
http://bugs.python.org/issue10044 for the discussion. In short,
no patch shown any impact on a realistic benchmark, only a minor
speedup on microbenchmarks. */
if (PyUnicode_CheckExact(left) &&
PyUnicode_CheckExact(right)) {
sum = unicode_concatenate(tstate, left, right, f, next_instr);
/* unicode_concatenate consumed the ref to left */
}
else {
sum = PyNumber_Add(left, right);
Py_DECREF(left);
}
Py_DECREF(right);
SET_TOP(sum);
if (sum == NULL)
goto error;
DISPATCH();
}
case 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();
}
case 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();
}
case 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();
}
case 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();
}
case 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();
}
case 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();
}
case 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();
}
case TARGET(LIST_APPEND): {
PyObject *v = POP();
PyObject *list = PEEK(oparg);
int err;
err = PyList_Append(list, v);
Py_DECREF(v);
if (err != 0)
goto error;
PREDICT(JUMP_ABSOLUTE);
DISPATCH();
}
case TARGET(SET_ADD): {
PyObject *v = POP();
PyObject *set = PEEK(oparg);
int err;
err = PySet_Add(set, v);
Py_DECREF(v);
if (err != 0)
goto error;
PREDICT(JUMP_ABSOLUTE);
DISPATCH();
}
case 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();
}
case 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();
}
case TARGET(INPLACE_MATRIX_MULTIPLY): {
PyObject *right = POP();
PyObject *left = TOP();
PyObject *res = PyNumber_InPlaceMatrixMultiply(left, right);
Py_DECREF(left);
Py_DECREF(right);
SET_TOP(res);
if (res == NULL)
goto error;
DISPATCH();
}
case 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();
}
case 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();
}
case 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();
}
case TARGET(INPLACE_ADD): {
PyObject *right = POP();
PyObject *left = TOP();
PyObject *sum;
if (PyUnicode_CheckExact(left) && PyUnicode_CheckExact(right)) {
sum = unicode_concatenate(tstate, left, right, f, next_instr);
/* unicode_concatenate consumed the ref to left */
}
else {
sum = PyNumber_InPlaceAdd(left, right);
Py_DECREF(left);
}
Py_DECREF(right);
SET_TOP(sum);
if (sum == NULL)
goto error;
DISPATCH();
}
case 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();
}
case 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();
}
case 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();
}
case 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();
}
case 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();
}
case 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();
}
case TARGET(STORE_SUBSCR): {
PyObject *sub = TOP();
PyObject *container = SECOND();
PyObject *v = THIRD();
int err;
STACK_SHRINK(3);
/* container[sub] = v */
err = PyObject_SetItem(container, sub, v);
Py_DECREF(v);
Py_DECREF(container);
Py_DECREF(sub);
if (err != 0)
goto error;
DISPATCH();
}
case TARGET(DELETE_SUBSCR): {
PyObject *sub = TOP();
PyObject *container = SECOND();
int err;
STACK_SHRINK(2);
/* del container[sub] */
err = PyObject_DelItem(container, sub);
Py_DECREF(container);
Py_DECREF(sub);
if (err != 0)
goto error;
DISPATCH();
}
case TARGET(PRINT_EXPR): {
_Py_IDENTIFIER(displayhook);
PyObject *value = POP();
PyObject *hook = _PySys_GetObjectId(&PyId_displayhook);
PyObject *res;
if (hook == NULL) {
_PyErr_SetString(tstate, PyExc_RuntimeError,
"lost sys.displayhook");
Py_DECREF(value);
goto error;
}
res = PyObject_CallFunctionObjArgs(hook, value, NULL);
Py_DECREF(value);
if (res == NULL)
goto error;
Py_DECREF(res);
DISPATCH();
}
case TARGET(RAISE_VARARGS): {
PyObject *cause = NULL, *exc = NULL;
switch (oparg) {
case 2:
cause = POP(); /* cause */
/* fall through */
case 1:
exc = POP(); /* exc */
/* fall through */
case 0:
if (do_raise(tstate, exc, cause)) {
goto exception_unwind;
}
break;
default:
_PyErr_SetString(tstate, PyExc_SystemError,
"bad RAISE_VARARGS oparg");
break;
}
goto error;
}
case TARGET(RETURN_VALUE): {
retval = POP();
assert(f->f_iblock == 0);
goto exit_returning;
}
case TARGET(GET_AITER): {
unaryfunc getter = NULL;
PyObject *iter = NULL;
PyObject *obj = TOP();
PyTypeObject *type = Py_TYPE(obj);
if (type->tp_as_async != NULL) {
getter = type->tp_as_async->am_aiter;
}
if (getter != NULL) {
iter = (*getter)(obj);
Py_DECREF(obj);
if (iter == NULL) {
SET_TOP(NULL);
goto error;
}
}
else {
SET_TOP(NULL);
_PyErr_Format(tstate, PyExc_TypeError,
"'async for' requires an object with "
"__aiter__ method, got %.100s",
type->tp_name);
Py_DECREF(obj);
goto error;
}
if (Py_TYPE(iter)->tp_as_async == NULL ||
Py_TYPE(iter)->tp_as_async->am_anext == NULL) {
SET_TOP(NULL);
_PyErr_Format(tstate, PyExc_TypeError,
"'async for' received an object from __aiter__ "
"that does not implement __anext__: %.100s",
Py_TYPE(iter)->tp_name);
Py_DECREF(iter);
goto error;
}
SET_TOP(iter);
DISPATCH();
}
case TARGET(GET_ANEXT): {
unaryfunc getter = NULL;
PyObject *next_iter = NULL;
PyObject *awaitable = NULL;
PyObject *aiter = TOP();
PyTypeObject *type = Py_TYPE(aiter);
if (PyAsyncGen_CheckExact(aiter)) {
awaitable = type->tp_as_async->am_anext(aiter);
if (awaitable == NULL) {
goto error;
}
} else {
if (type->tp_as_async != NULL){
getter = type->tp_as_async->am_anext;
}
if (getter != NULL) {
next_iter = (*getter)(aiter);
if (next_iter == NULL) {
goto error;
}
}
else {
_PyErr_Format(tstate, PyExc_TypeError,
"'async for' requires an iterator with "
"__anext__ method, got %.100s",
type->tp_name);
goto error;
}
awaitable = _PyCoro_GetAwaitableIter(next_iter);
if (awaitable == NULL) {
_PyErr_FormatFromCause(
PyExc_TypeError,
"'async for' received an invalid object "
"from __anext__: %.100s",
Py_TYPE(next_iter)->tp_name);
Py_DECREF(next_iter);
goto error;
} else {
Py_DECREF(next_iter);
}
}
PUSH(awaitable);
PREDICT(LOAD_CONST);
DISPATCH();
}
case TARGET(GET_AWAITABLE): {
PREDICTED(GET_AWAITABLE);
PyObject *iterable = TOP();
PyObject *iter = _PyCoro_GetAwaitableIter(iterable);
if (iter == NULL) {
format_awaitable_error(tstate, Py_TYPE(iterable),
_Py_OPCODE(next_instr[-2]));
}
Py_DECREF(iterable);
if (iter != NULL && PyCoro_CheckExact(iter)) {
PyObject *yf = _PyGen_yf((PyGenObject*)iter);
if (yf != NULL) {
/* `iter` is a coroutine object that is being
awaited, `yf` is a pointer to the current awaitable
being awaited on. */
Py_DECREF(yf);
Py_CLEAR(iter);
_PyErr_SetString(tstate, PyExc_RuntimeError,
"coroutine is being awaited already");
/* The code below jumps to `error` if `iter` is NULL. */
}
}
SET_TOP(iter); /* Even if it's NULL */
if (iter == NULL) {
goto error;
}
PREDICT(LOAD_CONST);
DISPATCH();
}
case TARGET(YIELD_FROM): {
PyObject *v = POP();
PyObject *receiver = TOP();
int err;
if (PyGen_CheckExact(receiver) || PyCoro_CheckExact(receiver)) {
retval = _PyGen_Send((PyGenObject *)receiver, v);
} else {
_Py_IDENTIFIER(send);
if (v == Py_None)
retval = Py_TYPE(receiver)->tp_iternext(receiver);
else
retval = _PyObject_CallMethodIdObjArgs(receiver, &PyId_send, v, NULL);
}
Py_DECREF(v);
if (retval == NULL) {
PyObject *val;
if (tstate->c_tracefunc != NULL
&& _PyErr_ExceptionMatches(tstate, PyExc_StopIteration))
call_exc_trace(tstate->c_tracefunc, tstate->c_traceobj, tstate, f);
err = _PyGen_FetchStopIterationValue(&val);
if (err < 0)
goto error;
Py_DECREF(receiver);
SET_TOP(val);
DISPATCH();
}
/* receiver remains on stack, retval is value to be yielded */
f->f_stacktop = stack_pointer;
/* and repeat... */
assert(f->f_lasti >= (int)sizeof(_Py_CODEUNIT));
f->f_lasti -= sizeof(_Py_CODEUNIT);
goto exit_yielding;
}
case TARGET(YIELD_VALUE): {
retval = POP();
if (co->co_flags & CO_ASYNC_GENERATOR) {
PyObject *w = _PyAsyncGenValueWrapperNew(retval);
Py_DECREF(retval);
if (w == NULL) {
retval = NULL;
goto error;
}
retval = w;
}
f->f_stacktop = stack_pointer;
goto exit_yielding;
}
case TARGET(POP_EXCEPT): {
PyObject *type, *value, *traceback;
_PyErr_StackItem *exc_info;
PyTryBlock *b = PyFrame_BlockPop(f);
if (b->b_type != EXCEPT_HANDLER) {
_PyErr_SetString(tstate, PyExc_SystemError,
"popped block is not an except handler");
goto error;
}
assert(STACK_LEVEL() >= (b)->b_level + 3 &&
STACK_LEVEL() <= (b)->b_level + 4);
exc_info = tstate->exc_info;
type = exc_info->exc_type;
value = exc_info->exc_value;
traceback = exc_info->exc_traceback;
exc_info->exc_type = POP();
exc_info->exc_value = POP();
exc_info->exc_traceback = POP();
Py_XDECREF(type);
Py_XDECREF(value);
Py_XDECREF(traceback);
DISPATCH();
}
case TARGET(POP_BLOCK): {
PREDICTED(POP_BLOCK);
PyFrame_BlockPop(f);
DISPATCH();
}
case TARGET(POP_FINALLY): {
/* If oparg is 0 at the top of the stack are 1 or 6 values:
Either:
- TOP = NULL or an integer
or:
- (TOP, SECOND, THIRD) = exc_info()
- (FOURTH, FITH, SIXTH) = previous exception for EXCEPT_HANDLER
If oparg is 1 the value for 'return' was additionally pushed
at the top of the stack.
*/
PyObject *res = NULL;
if (oparg) {
res = POP();
}
PyObject *exc = POP();
if (exc == NULL || PyLong_CheckExact(exc)) {
Py_XDECREF(exc);
}
else {
Py_DECREF(exc);
Py_DECREF(POP());
Py_DECREF(POP());
PyObject *type, *value, *traceback;
_PyErr_StackItem *exc_info;
PyTryBlock *b = PyFrame_BlockPop(f);
if (b->b_type != EXCEPT_HANDLER) {
_PyErr_SetString(tstate, PyExc_SystemError,
"popped block is not an except handler");
Py_XDECREF(res);
goto error;
}
assert(STACK_LEVEL() == (b)->b_level + 3);
exc_info = tstate->exc_info;
type = exc_info->exc_type;
value = exc_info->exc_value;
traceback = exc_info->exc_traceback;
exc_info->exc_type = POP();
exc_info->exc_value = POP();
exc_info->exc_traceback = POP();
Py_XDECREF(type);
Py_XDECREF(value);
Py_XDECREF(traceback);
}
if (oparg) {
PUSH(res);
}
DISPATCH();
}
case TARGET(CALL_FINALLY): {
PyObject *ret = PyLong_FromLong(INSTR_OFFSET());
if (ret == NULL) {
goto error;
}
PUSH(ret);
JUMPBY(oparg);
FAST_DISPATCH();
}
case TARGET(BEGIN_FINALLY): {
/* Push NULL onto the stack for using it in END_FINALLY,
POP_FINALLY, WITH_CLEANUP_START and WITH_CLEANUP_FINISH.
*/
PUSH(NULL);
FAST_DISPATCH();
}
case TARGET(END_FINALLY): {
PREDICTED(END_FINALLY);
/* At the top of the stack are 1 or 6 values:
Either:
- TOP = NULL or an integer
or:
- (TOP, SECOND, THIRD) = exc_info()
- (FOURTH, FITH, SIXTH) = previous exception for EXCEPT_HANDLER
*/
PyObject *exc = POP();
if (exc == NULL) {
FAST_DISPATCH();
}
else if (PyLong_CheckExact(exc)) {
int ret = _PyLong_AsInt(exc);
Py_DECREF(exc);
if (ret == -1 && _PyErr_Occurred(tstate)) {
goto error;
}
JUMPTO(ret);
FAST_DISPATCH();
}
else {
assert(PyExceptionClass_Check(exc));
PyObject *val = POP();
PyObject *tb = POP();
_PyErr_Restore(tstate, exc, val, tb);
goto exception_unwind;
}
}
case TARGET(END_ASYNC_FOR): {
PyObject *exc = POP();
assert(PyExceptionClass_Check(exc));
if (PyErr_GivenExceptionMatches(exc, PyExc_StopAsyncIteration)) {
PyTryBlock *b = PyFrame_BlockPop(f);
assert(b->b_type == EXCEPT_HANDLER);
Py_DECREF(exc);
UNWIND_EXCEPT_HANDLER(b);
Py_DECREF(POP());
JUMPBY(oparg);
FAST_DISPATCH();
}
else {
PyObject *val = POP();
PyObject *tb = POP();
_PyErr_Restore(tstate, exc, val, tb);
goto exception_unwind;
}
}
case TARGET(LOAD_BUILD_CLASS): {
_Py_IDENTIFIER(__build_class__);
PyObject *bc;
if (PyDict_CheckExact(f->f_builtins)) {
bc = _PyDict_GetItemIdWithError(f->f_builtins, &PyId___build_class__);
if (bc == NULL) {
if (!_PyErr_Occurred(tstate)) {
_PyErr_SetString(tstate, PyExc_NameError,
"__build_class__ not found");
}
goto error;
}
Py_INCREF(bc);
}
else {
PyObject *build_class_str = _PyUnicode_FromId(&PyId___build_class__);
if (build_class_str == NULL)
goto error;
bc = PyObject_GetItem(f->f_builtins, build_class_str);
if (bc == NULL) {
if (_PyErr_ExceptionMatches(tstate, PyExc_KeyError))
_PyErr_SetString(tstate, PyExc_NameError,
"__build_class__ not found");
goto error;
}
}
PUSH(bc);
DISPATCH();
}
case TARGET(STORE_NAME): {
PyObject *name = GETITEM(names, oparg);
PyObject *v = POP();
PyObject *ns = f->f_locals;
int err;
if (ns == NULL) {
_PyErr_Format(tstate, PyExc_SystemError,
"no locals found when storing %R", name);
Py_DECREF(v);
goto error;
}
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();
}
case TARGET(DELETE_NAME): {
PyObject *name = GETITEM(names, oparg);
PyObject *ns = f->f_locals;
int err;
if (ns == NULL) {
_PyErr_Format(tstate, PyExc_SystemError,
"no locals when deleting %R", name);
goto error;
}
err = PyObject_DelItem(ns, name);
if (err != 0) {
format_exc_check_arg(tstate, PyExc_NameError,
NAME_ERROR_MSG,
name);
goto error;
}
DISPATCH();
}
case TARGET(UNPACK_SEQUENCE): {
PREDICTED(UNPACK_SEQUENCE);
PyObject *seq = POP(), *item, **items;
if (PyTuple_CheckExact(seq) &&
PyTuple_GET_SIZE(seq) == oparg) {
items = ((PyTupleObject *)seq)->ob_item;
while (oparg--) {
item = items[oparg];
Py_INCREF(item);
PUSH(item);
}
} else if (PyList_CheckExact(seq) &&
PyList_GET_SIZE(seq) == oparg) {
items = ((PyListObject *)seq)->ob_item;
while (oparg--) {
item = items[oparg];
Py_INCREF(item);
PUSH(item);
}
} else if (unpack_iterable(tstate, seq, oparg, -1,
stack_pointer + oparg)) {
STACK_GROW(oparg);
} else {
/* unpack_iterable() raised an exception */
Py_DECREF(seq);
goto error;
}
Py_DECREF(seq);
DISPATCH();
}
case TARGET(UNPACK_EX): {
int totalargs = 1 + (oparg & 0xFF) + (oparg >> 8);
PyObject *seq = POP();
if (unpack_iterable(tstate, seq, oparg & 0xFF, oparg >> 8,
stack_pointer + totalargs)) {
stack_pointer += totalargs;
} else {
Py_DECREF(seq);
goto error;
}
Py_DECREF(seq);
DISPATCH();
}
case TARGET(STORE_ATTR): {
PyObject *name = GETITEM(names, oparg);
PyObject *owner = TOP();
PyObject *v = SECOND();
int err;
STACK_SHRINK(2);
err = PyObject_SetAttr(owner, name, v);
Py_DECREF(v);
Py_DECREF(owner);
if (err != 0)
goto error;
DISPATCH();
}
case 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();
}
case 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)
goto error;
DISPATCH();
}
case TARGET(DELETE_GLOBAL): {
PyObject *name = GETITEM(names, oparg);
int err;
err = PyDict_DelItem(f->f_globals, name);
if (err != 0) {
if (_PyErr_ExceptionMatches(tstate, PyExc_KeyError)) {
format_exc_check_arg(tstate, PyExc_NameError,
NAME_ERROR_MSG, name);
}
goto error;
}
DISPATCH();
}
case TARGET(LOAD_NAME): {
PyObject *name = GETITEM(names, oparg);
PyObject *locals = f->f_locals;
PyObject *v;
if (locals == NULL) {
_PyErr_Format(tstate, PyExc_SystemError,
"no locals when loading %R", name);
goto error;
}
if (PyDict_CheckExact(locals)) {
v = PyDict_GetItemWithError(locals, name);
if (v != NULL) {
Py_INCREF(v);
}
else if (_PyErr_Occurred(tstate)) {
goto error;
}
}
else {
v = PyObject_GetItem(locals, name);
if (v == NULL) {
if (!_PyErr_ExceptionMatches(tstate, PyExc_KeyError))
goto error;
_PyErr_Clear(tstate);
}
}
if (v == NULL) {
v = PyDict_GetItemWithError(f->f_globals, name);
if (v != NULL) {
Py_INCREF(v);
}
else if (_PyErr_Occurred(tstate)) {
goto error;
}
else {
if (PyDict_CheckExact(f->f_builtins)) {
v = PyDict_GetItemWithError(f->f_builtins, name);
if (v == NULL) {
if (!_PyErr_Occurred(tstate)) {
format_exc_check_arg(
tstate, PyExc_NameError,
NAME_ERROR_MSG, name);
}
goto error;
}
Py_INCREF(v);
}
else {
v = PyObject_GetItem(f->f_builtins, name);
if (v == NULL) {
if (_PyErr_ExceptionMatches(tstate, PyExc_KeyError)) {
format_exc_check_arg(
tstate, PyExc_NameError,
NAME_ERROR_MSG, name);
}
goto error;
}
}
}
}
PUSH(v);
DISPATCH();
}
case TARGET(LOAD_GLOBAL): {
PyObject *name;
PyObject *v;
if (PyDict_CheckExact(f->f_globals)
&& PyDict_CheckExact(f->f_builtins))
{
OPCACHE_CHECK();
if (co_opcache != NULL && co_opcache->optimized > 0) {
_PyOpcache_LoadGlobal *lg = &co_opcache->u.lg;
if (lg->globals_ver ==
((PyDictObject *)f->f_globals)->ma_version_tag
&& lg->builtins_ver ==
((PyDictObject *)f->f_builtins)->ma_version_tag)
{
PyObject *ptr = lg->ptr;
OPCACHE_STAT_GLOBAL_HIT();
assert(ptr != NULL);
Py_INCREF(ptr);
PUSH(ptr);
DISPATCH();
}
}
name = GETITEM(names, oparg);
v = _PyDict_LoadGlobal((PyDictObject *)f->f_globals,
(PyDictObject *)f->f_builtins,
name);
if (v == NULL) {
if (!_PyErr_OCCURRED()) {
/* _PyDict_LoadGlobal() returns NULL without raising
* an exception if the key doesn't exist */
format_exc_check_arg(tstate, PyExc_NameError,
NAME_ERROR_MSG, name);
}
goto error;
}
if (co_opcache != NULL) {
_PyOpcache_LoadGlobal *lg = &co_opcache->u.lg;
if (co_opcache->optimized == 0) {
/* Wasn't optimized before. */
OPCACHE_STAT_GLOBAL_OPT();
} else {
OPCACHE_STAT_GLOBAL_MISS();
}
co_opcache->optimized = 1;
lg->globals_ver =
((PyDictObject *)f->f_globals)->ma_version_tag;
lg->builtins_ver =
((PyDictObject *)f->f_builtins)->ma_version_tag;
lg->ptr = v; /* borrowed */
}
Py_INCREF(v);
}
else {
/* Slow-path if globals or builtins is not a dict */
/* namespace 1: globals */
name = GETITEM(names, oparg);
v = PyObject_GetItem(f->f_globals, name);
if (v == NULL) {
if (!_PyErr_ExceptionMatches(tstate, PyExc_KeyError)) {
goto error;
}
_PyErr_Clear(tstate);
/* namespace 2: builtins */
v = PyObject_GetItem(f->f_builtins, name);
if (v == NULL) {
if (_PyErr_ExceptionMatches(tstate, PyExc_KeyError)) {
format_exc_check_arg(
tstate, PyExc_NameError,
NAME_ERROR_MSG, name);
}
goto error;
}
}
}
PUSH(v);
DISPATCH();
}
case TARGET(DELETE_FAST): {
PyObject *v = GETLOCAL(oparg);
if (v != NULL) {
SETLOCAL(oparg, NULL);
DISPATCH();
}
format_exc_check_arg(
tstate, PyExc_UnboundLocalError,
UNBOUNDLOCAL_ERROR_MSG,
PyTuple_GetItem(co->co_varnames, oparg)
);
goto error;
}
case TARGET(DELETE_DEREF): {
PyObject *cell = freevars[oparg];
PyObject *oldobj = PyCell_GET(cell);
if (oldobj != NULL) {
PyCell_SET(cell, NULL);
Py_DECREF(oldobj);
DISPATCH();
}
format_exc_unbound(tstate, co, oparg);
goto error;
}
case TARGET(LOAD_CLOSURE): {
PyObject *cell = freevars[oparg];
Py_INCREF(cell);
PUSH(cell);
DISPATCH();
}
case 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_GetItemWithError(locals, name);
if (value != NULL) {
Py_INCREF(value);
}
else if (_PyErr_Occurred(tstate)) {
goto error;
}
}
else {
value = PyObject_GetItem(locals, name);
if (value == NULL) {
if (!_PyErr_ExceptionMatches(tstate, PyExc_KeyError)) {
goto error;
}
_PyErr_Clear(tstate);
}
}
if (!value) {
PyObject *cell = freevars[oparg];
value = PyCell_GET(cell);
if (value == NULL) {
format_exc_unbound(tstate, co, oparg);
goto error;
}
Py_INCREF(value);
}
PUSH(value);
DISPATCH();
}
case TARGET(LOAD_DEREF): {
PyObject *cell = freevars[oparg];
PyObject *value = PyCell_GET(cell);
if (value == NULL) {
format_exc_unbound(tstate, co, oparg);
goto error;
}
Py_INCREF(value);
PUSH(value);
DISPATCH();
}
case TARGET(STORE_DEREF): {
PyObject *v = POP();
PyObject *cell = freevars[oparg];
PyObject *oldobj = PyCell_GET(cell);
PyCell_SET(cell, v);
Py_XDECREF(oldobj);
DISPATCH();
}
case TARGET(BUILD_STRING): {
PyObject *str;
PyObject *empty = PyUnicode_New(0, 0);
if (empty == NULL) {
goto error;
}
str = _PyUnicode_JoinArray(empty, stack_pointer - oparg, oparg);
Py_DECREF(empty);
if (str == NULL)
goto error;
while (--oparg >= 0) {
PyObject *item = POP();
Py_DECREF(item);
}
PUSH(str);
DISPATCH();
}
case 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);
}
PUSH(tup);
DISPATCH();
}
case 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);
}
PUSH(list);
DISPATCH();
}
case TARGET(BUILD_TUPLE_UNPACK_WITH_CALL):
case TARGET(BUILD_TUPLE_UNPACK):
case TARGET(BUILD_LIST_UNPACK): {
int convert_to_tuple = opcode != BUILD_LIST_UNPACK;
Py_ssize_t i;
PyObject *sum = PyList_New(0);
PyObject *return_value;
if (sum == NULL)
goto error;
for (i = oparg; i > 0; i--) {
PyObject *none_val;
none_val = _PyList_Extend((PyListObject *)sum, PEEK(i));
if (none_val == NULL) {
if (opcode == BUILD_TUPLE_UNPACK_WITH_CALL &&
_PyErr_ExceptionMatches(tstate, PyExc_TypeError))
{
check_args_iterable(tstate, PEEK(1 + oparg), PEEK(i));
}
Py_DECREF(sum);
goto error;
}
Py_DECREF(none_val);
}
if (convert_to_tuple) {
return_value = PyList_AsTuple(sum);
Py_DECREF(sum);
if (return_value == NULL)
goto error;
}
else {
return_value = sum;
}
while (oparg--)
Py_DECREF(POP());
PUSH(return_value);
DISPATCH();
}
case TARGET(BUILD_SET): {
PyObject *set = PySet_New(NULL);
int err = 0;
int i;
if (set == NULL)
goto error;
for (i = oparg; i > 0; i--) {
PyObject *item = PEEK(i);
if (err == 0)
err = PySet_Add(set, item);
Py_DECREF(item);
}
STACK_SHRINK(oparg);
if (err != 0) {
Py_DECREF(set);
goto error;
}
PUSH(set);
DISPATCH();
}
case TARGET(BUILD_SET_UNPACK): {
Py_ssize_t i;
PyObject *sum = PySet_New(NULL);
if (sum == NULL)
goto error;
for (i = oparg; i > 0; i--) {
if (_PySet_Update(sum, PEEK(i)) < 0) {
Py_DECREF(sum);
goto error;
}
}
while (oparg--)
Py_DECREF(POP());
PUSH(sum);
DISPATCH();
}
case TARGET(BUILD_MAP): {
Py_ssize_t i;
PyObject *map = _PyDict_NewPresized((Py_ssize_t)oparg);
if (map == NULL)
goto error;
for (i = oparg; i > 0; i--) {
int err;
PyObject *key = PEEK(2*i);
PyObject *value = PEEK(2*i - 1);
err = PyDict_SetItem(map, key, value);
if (err != 0) {
Py_DECREF(map);
goto error;
}
}
while (oparg--) {
Py_DECREF(POP());
Py_DECREF(POP());
}
PUSH(map);
DISPATCH();
}
case TARGET(SETUP_ANNOTATIONS): {
_Py_IDENTIFIER(__annotations__);
int err;
PyObject *ann_dict;
if (f->f_locals == NULL) {
_PyErr_Format(tstate, PyExc_SystemError,
"no locals found when setting up annotations");
goto error;
}
/* check if __annotations__ in locals()... */
if (PyDict_CheckExact(f->f_locals)) {
ann_dict = _PyDict_GetItemIdWithError(f->f_locals,
&PyId___annotations__);
if (ann_dict == NULL) {
if (_PyErr_Occurred(tstate)) {
goto error;
}
/* ...if not, create a new one */
ann_dict = PyDict_New();
if (ann_dict == NULL) {
goto error;
}
err = _PyDict_SetItemId(f->f_locals,
&PyId___annotations__, ann_dict);
Py_DECREF(ann_dict);
if (err != 0) {
goto error;
}
}
}
else {
/* do the same if locals() is not a dict */
PyObject *ann_str = _PyUnicode_FromId(&PyId___annotations__);
if (ann_str == NULL) {
goto error;
}
ann_dict = PyObject_GetItem(f->f_locals, ann_str);
if (ann_dict == NULL) {
if (!_PyErr_ExceptionMatches(tstate, PyExc_KeyError)) {
goto error;
}
_PyErr_Clear(tstate);
ann_dict = PyDict_New();
if (ann_dict == NULL) {
goto error;
}
err = PyObject_SetItem(f->f_locals, ann_str, ann_dict);
Py_DECREF(ann_dict);
if (err != 0) {
goto error;
}
}
else {
Py_DECREF(ann_dict);
}
}
DISPATCH();
}
case TARGET(BUILD_CONST_KEY_MAP): {
Py_ssize_t i;
PyObject *map;
PyObject *keys = TOP();
if (!PyTuple_CheckExact(keys) ||
PyTuple_GET_SIZE(keys) != (Py_ssize_t)oparg) {
_PyErr_SetString(tstate, PyExc_SystemError,
"bad BUILD_CONST_KEY_MAP keys argument");
goto error;
}
map = _PyDict_NewPresized((Py_ssize_t)oparg);
if (map == NULL) {
goto error;
}
for (i = oparg; i > 0; i--) {
int err;
PyObject *key = PyTuple_GET_ITEM(keys, oparg - i);
PyObject *value = PEEK(i + 1);
err = PyDict_SetItem(map, key, value);
if (err != 0) {
Py_DECREF(map);
goto error;
}
}
Py_DECREF(POP());
while (oparg--) {
Py_DECREF(POP());
}
PUSH(map);
DISPATCH();
}
case TARGET(BUILD_MAP_UNPACK): {
Py_ssize_t i;
PyObject *sum = PyDict_New();
if (sum == NULL)
goto error;
for (i = oparg; i > 0; i--) {
PyObject *arg = PEEK(i);
if (PyDict_Update(sum, arg) < 0) {
if (_PyErr_ExceptionMatches(tstate, PyExc_AttributeError)) {
_PyErr_Format(tstate, PyExc_TypeError,
"'%.200s' object is not a mapping",
arg->ob_type->tp_name);
}
Py_DECREF(sum);
goto error;
}
}
while (oparg--)
Py_DECREF(POP());
PUSH(sum);
DISPATCH();
}
case TARGET(BUILD_MAP_UNPACK_WITH_CALL): {
Py_ssize_t i;
PyObject *sum = PyDict_New();
if (sum == NULL)
goto error;
for (i = oparg; i > 0; i--) {
PyObject *arg = PEEK(i);
if (_PyDict_MergeEx(sum, arg, 2) < 0) {
Py_DECREF(sum);
format_kwargs_error(tstate, PEEK(2 + oparg), arg);
goto error;
}
}
while (oparg--)
Py_DECREF(POP());
PUSH(sum);
DISPATCH();
}
case TARGET(MAP_ADD): {
PyObject *value = TOP();
PyObject *key = SECOND();
PyObject *map;
int err;
STACK_SHRINK(2);
map = PEEK(oparg); /* dict */
assert(PyDict_CheckExact(map));
err = PyDict_SetItem(map, key, value); /* map[key] = value */
Py_DECREF(value);
Py_DECREF(key);
if (err != 0)
goto error;
PREDICT(JUMP_ABSOLUTE);
DISPATCH();
}
case 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();
}
case TARGET(COMPARE_OP): {
PyObject *right = POP();
PyObject *left = TOP();
PyObject *res = cmp_outcome(tstate, 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();
}
case TARGET(IMPORT_NAME): {
PyObject *name = GETITEM(names, oparg);
PyObject *fromlist = POP();
PyObject *level = TOP();
PyObject *res;
res = import_name(tstate, f, name, fromlist, level);
Py_DECREF(level);
Py_DECREF(fromlist);
SET_TOP(res);
if (res == NULL)
goto error;
DISPATCH();