mirror of
https://github.com/python/cpython.git
synced 2025-10-25 02:43:41 +00:00
2336 lines
71 KiB
C
2336 lines
71 KiB
C
#include <stdbool.h>
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#include "Python.h"
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#include "opcode.h"
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#include "pycore_code.h" // _PyCodeConstructor
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#include "pycore_frame.h" // FRAME_SPECIALS_SIZE
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#include "pycore_interp.h" // PyInterpreterState.co_extra_freefuncs
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#include "pycore_opcode.h" // _PyOpcode_Deopt
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#include "pycore_pystate.h" // _PyInterpreterState_GET()
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#include "pycore_setobject.h" // _PySet_NextEntry()
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#include "pycore_tuple.h" // _PyTuple_ITEMS()
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#include "clinic/codeobject.c.h"
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static PyObject* code_repr(PyCodeObject *co);
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static const char *
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code_event_name(PyCodeEvent event) {
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switch (event) {
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#define CASE(op) \
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case PY_CODE_EVENT_##op: \
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return "PY_CODE_EVENT_" #op;
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PY_FOREACH_CODE_EVENT(CASE)
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#undef CASE
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}
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Py_UNREACHABLE();
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}
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static void
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notify_code_watchers(PyCodeEvent event, PyCodeObject *co)
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{
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assert(Py_REFCNT(co) > 0);
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PyInterpreterState *interp = _PyInterpreterState_GET();
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assert(interp->_initialized);
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uint8_t bits = interp->active_code_watchers;
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int i = 0;
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while (bits) {
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assert(i < CODE_MAX_WATCHERS);
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if (bits & 1) {
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PyCode_WatchCallback cb = interp->code_watchers[i];
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// callback must be non-null if the watcher bit is set
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assert(cb != NULL);
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if (cb(event, co) < 0) {
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// Don't risk resurrecting the object if an unraisablehook keeps
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// a reference; pass a string as context.
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PyObject *context = NULL;
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PyObject *repr = code_repr(co);
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if (repr) {
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context = PyUnicode_FromFormat(
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"%s watcher callback for %U",
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code_event_name(event), repr);
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Py_DECREF(repr);
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}
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if (context == NULL) {
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context = Py_NewRef(Py_None);
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}
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PyErr_WriteUnraisable(context);
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Py_DECREF(context);
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}
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}
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i++;
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bits >>= 1;
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}
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}
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int
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PyCode_AddWatcher(PyCode_WatchCallback callback)
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{
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PyInterpreterState *interp = _PyInterpreterState_GET();
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assert(interp->_initialized);
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for (int i = 0; i < CODE_MAX_WATCHERS; i++) {
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if (!interp->code_watchers[i]) {
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interp->code_watchers[i] = callback;
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interp->active_code_watchers |= (1 << i);
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return i;
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}
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}
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PyErr_SetString(PyExc_RuntimeError, "no more code watcher IDs available");
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return -1;
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}
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static inline int
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validate_watcher_id(PyInterpreterState *interp, int watcher_id)
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{
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if (watcher_id < 0 || watcher_id >= CODE_MAX_WATCHERS) {
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PyErr_Format(PyExc_ValueError, "Invalid code watcher ID %d", watcher_id);
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return -1;
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}
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if (!interp->code_watchers[watcher_id]) {
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PyErr_Format(PyExc_ValueError, "No code watcher set for ID %d", watcher_id);
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return -1;
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}
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return 0;
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}
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int
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PyCode_ClearWatcher(int watcher_id)
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{
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PyInterpreterState *interp = _PyInterpreterState_GET();
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assert(interp->_initialized);
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if (validate_watcher_id(interp, watcher_id) < 0) {
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return -1;
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}
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interp->code_watchers[watcher_id] = NULL;
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interp->active_code_watchers &= ~(1 << watcher_id);
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return 0;
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}
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/******************
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* generic helpers
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******************/
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/* all_name_chars(s): true iff s matches [a-zA-Z0-9_]* */
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static int
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all_name_chars(PyObject *o)
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{
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const unsigned char *s, *e;
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if (!PyUnicode_IS_ASCII(o))
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return 0;
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s = PyUnicode_1BYTE_DATA(o);
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e = s + PyUnicode_GET_LENGTH(o);
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for (; s != e; s++) {
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if (!Py_ISALNUM(*s) && *s != '_')
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return 0;
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}
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return 1;
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}
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static int
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intern_strings(PyObject *tuple)
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{
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Py_ssize_t i;
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for (i = PyTuple_GET_SIZE(tuple); --i >= 0; ) {
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PyObject *v = PyTuple_GET_ITEM(tuple, i);
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if (v == NULL || !PyUnicode_CheckExact(v)) {
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PyErr_SetString(PyExc_SystemError,
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"non-string found in code slot");
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return -1;
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}
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PyUnicode_InternInPlace(&_PyTuple_ITEMS(tuple)[i]);
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}
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return 0;
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}
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/* Intern selected string constants */
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static int
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intern_string_constants(PyObject *tuple, int *modified)
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{
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for (Py_ssize_t i = PyTuple_GET_SIZE(tuple); --i >= 0; ) {
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PyObject *v = PyTuple_GET_ITEM(tuple, i);
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if (PyUnicode_CheckExact(v)) {
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if (all_name_chars(v)) {
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PyObject *w = v;
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PyUnicode_InternInPlace(&v);
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if (w != v) {
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PyTuple_SET_ITEM(tuple, i, v);
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if (modified) {
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*modified = 1;
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}
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}
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}
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}
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else if (PyTuple_CheckExact(v)) {
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if (intern_string_constants(v, NULL) < 0) {
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return -1;
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}
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}
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else if (PyFrozenSet_CheckExact(v)) {
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PyObject *w = v;
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PyObject *tmp = PySequence_Tuple(v);
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if (tmp == NULL) {
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return -1;
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}
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int tmp_modified = 0;
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if (intern_string_constants(tmp, &tmp_modified) < 0) {
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Py_DECREF(tmp);
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return -1;
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}
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if (tmp_modified) {
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v = PyFrozenSet_New(tmp);
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if (v == NULL) {
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Py_DECREF(tmp);
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return -1;
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}
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PyTuple_SET_ITEM(tuple, i, v);
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Py_DECREF(w);
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if (modified) {
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*modified = 1;
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}
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}
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Py_DECREF(tmp);
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}
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}
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return 0;
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}
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/* Return a shallow copy of a tuple that is
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guaranteed to contain exact strings, by converting string subclasses
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to exact strings and complaining if a non-string is found. */
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static PyObject*
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validate_and_copy_tuple(PyObject *tup)
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{
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PyObject *newtuple;
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PyObject *item;
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Py_ssize_t i, len;
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len = PyTuple_GET_SIZE(tup);
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newtuple = PyTuple_New(len);
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if (newtuple == NULL)
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return NULL;
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for (i = 0; i < len; i++) {
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item = PyTuple_GET_ITEM(tup, i);
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if (PyUnicode_CheckExact(item)) {
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Py_INCREF(item);
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}
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else if (!PyUnicode_Check(item)) {
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PyErr_Format(
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PyExc_TypeError,
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"name tuples must contain only "
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"strings, not '%.500s'",
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Py_TYPE(item)->tp_name);
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Py_DECREF(newtuple);
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return NULL;
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}
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else {
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item = _PyUnicode_Copy(item);
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if (item == NULL) {
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Py_DECREF(newtuple);
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return NULL;
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}
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}
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PyTuple_SET_ITEM(newtuple, i, item);
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}
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return newtuple;
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}
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static int
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init_co_cached(PyCodeObject *self) {
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if (self->_co_cached == NULL) {
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self->_co_cached = PyMem_New(_PyCoCached, 1);
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if (self->_co_cached == NULL) {
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PyErr_NoMemory();
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return -1;
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}
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self->_co_cached->_co_code = NULL;
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self->_co_cached->_co_cellvars = NULL;
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self->_co_cached->_co_freevars = NULL;
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self->_co_cached->_co_varnames = NULL;
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}
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return 0;
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}
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/******************
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* _PyCode_New()
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******************/
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// This is also used in compile.c.
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void
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_Py_set_localsplus_info(int offset, PyObject *name, _PyLocals_Kind kind,
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PyObject *names, PyObject *kinds)
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{
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PyTuple_SET_ITEM(names, offset, Py_NewRef(name));
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_PyLocals_SetKind(kinds, offset, kind);
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}
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static void
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get_localsplus_counts(PyObject *names, PyObject *kinds,
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int *pnlocals, int *pncellvars,
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int *pnfreevars)
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{
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int nlocals = 0;
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int ncellvars = 0;
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int nfreevars = 0;
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Py_ssize_t nlocalsplus = PyTuple_GET_SIZE(names);
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for (int i = 0; i < nlocalsplus; i++) {
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_PyLocals_Kind kind = _PyLocals_GetKind(kinds, i);
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if (kind & CO_FAST_LOCAL) {
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nlocals += 1;
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if (kind & CO_FAST_CELL) {
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ncellvars += 1;
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}
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}
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else if (kind & CO_FAST_CELL) {
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ncellvars += 1;
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}
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else if (kind & CO_FAST_FREE) {
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nfreevars += 1;
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}
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}
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if (pnlocals != NULL) {
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*pnlocals = nlocals;
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}
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if (pncellvars != NULL) {
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*pncellvars = ncellvars;
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}
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if (pnfreevars != NULL) {
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*pnfreevars = nfreevars;
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}
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}
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static PyObject *
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get_localsplus_names(PyCodeObject *co, _PyLocals_Kind kind, int num)
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{
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PyObject *names = PyTuple_New(num);
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if (names == NULL) {
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return NULL;
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}
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int index = 0;
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for (int offset = 0; offset < co->co_nlocalsplus; offset++) {
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_PyLocals_Kind k = _PyLocals_GetKind(co->co_localspluskinds, offset);
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if ((k & kind) == 0) {
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continue;
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}
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assert(index < num);
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PyObject *name = PyTuple_GET_ITEM(co->co_localsplusnames, offset);
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PyTuple_SET_ITEM(names, index, Py_NewRef(name));
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index += 1;
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}
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assert(index == num);
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return names;
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}
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int
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_PyCode_Validate(struct _PyCodeConstructor *con)
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{
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/* Check argument types */
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if (con->argcount < con->posonlyargcount || con->posonlyargcount < 0 ||
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con->kwonlyargcount < 0 ||
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con->stacksize < 0 || con->flags < 0 ||
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con->code == NULL || !PyBytes_Check(con->code) ||
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con->consts == NULL || !PyTuple_Check(con->consts) ||
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con->names == NULL || !PyTuple_Check(con->names) ||
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con->localsplusnames == NULL || !PyTuple_Check(con->localsplusnames) ||
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con->localspluskinds == NULL || !PyBytes_Check(con->localspluskinds) ||
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PyTuple_GET_SIZE(con->localsplusnames)
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!= PyBytes_GET_SIZE(con->localspluskinds) ||
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con->name == NULL || !PyUnicode_Check(con->name) ||
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con->qualname == NULL || !PyUnicode_Check(con->qualname) ||
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con->filename == NULL || !PyUnicode_Check(con->filename) ||
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con->linetable == NULL || !PyBytes_Check(con->linetable) ||
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con->exceptiontable == NULL || !PyBytes_Check(con->exceptiontable)
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) {
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PyErr_BadInternalCall();
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return -1;
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}
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/* Make sure that code is indexable with an int, this is
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a long running assumption in ceval.c and many parts of
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the interpreter. */
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if (PyBytes_GET_SIZE(con->code) > INT_MAX) {
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PyErr_SetString(PyExc_OverflowError,
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"code: co_code larger than INT_MAX");
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return -1;
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}
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if (PyBytes_GET_SIZE(con->code) % sizeof(_Py_CODEUNIT) != 0 ||
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!_Py_IS_ALIGNED(PyBytes_AS_STRING(con->code), sizeof(_Py_CODEUNIT))
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) {
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PyErr_SetString(PyExc_ValueError, "code: co_code is malformed");
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return -1;
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}
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/* Ensure that the co_varnames has enough names to cover the arg counts.
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* Note that totalargs = nlocals - nplainlocals. We check nplainlocals
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* here to avoid the possibility of overflow (however remote). */
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int nlocals;
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get_localsplus_counts(con->localsplusnames, con->localspluskinds,
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&nlocals, NULL, NULL);
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int nplainlocals = nlocals -
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con->argcount -
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con->kwonlyargcount -
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((con->flags & CO_VARARGS) != 0) -
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((con->flags & CO_VARKEYWORDS) != 0);
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if (nplainlocals < 0) {
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PyErr_SetString(PyExc_ValueError, "code: co_varnames is too small");
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return -1;
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}
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return 0;
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}
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extern void _PyCode_Quicken(PyCodeObject *code);
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static void
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init_code(PyCodeObject *co, struct _PyCodeConstructor *con)
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{
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int nlocalsplus = (int)PyTuple_GET_SIZE(con->localsplusnames);
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int nlocals, ncellvars, nfreevars;
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get_localsplus_counts(con->localsplusnames, con->localspluskinds,
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&nlocals, &ncellvars, &nfreevars);
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co->co_filename = Py_NewRef(con->filename);
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co->co_name = Py_NewRef(con->name);
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co->co_qualname = Py_NewRef(con->qualname);
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co->co_flags = con->flags;
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co->co_firstlineno = con->firstlineno;
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co->co_linetable = Py_NewRef(con->linetable);
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co->co_consts = Py_NewRef(con->consts);
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co->co_names = Py_NewRef(con->names);
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co->co_localsplusnames = Py_NewRef(con->localsplusnames);
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co->co_localspluskinds = Py_NewRef(con->localspluskinds);
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co->co_argcount = con->argcount;
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co->co_posonlyargcount = con->posonlyargcount;
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co->co_kwonlyargcount = con->kwonlyargcount;
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co->co_stacksize = con->stacksize;
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co->co_exceptiontable = Py_NewRef(con->exceptiontable);
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/* derived values */
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co->co_nlocalsplus = nlocalsplus;
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co->co_nlocals = nlocals;
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co->co_framesize = nlocalsplus + con->stacksize + FRAME_SPECIALS_SIZE;
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co->co_ncellvars = ncellvars;
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co->co_nfreevars = nfreevars;
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co->co_version = _Py_next_func_version;
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if (_Py_next_func_version != 0) {
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_Py_next_func_version++;
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}
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co->_co_monitoring = NULL;
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co->_co_instrumentation_version = 0;
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/* not set */
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co->co_weakreflist = NULL;
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co->co_extra = NULL;
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co->_co_cached = NULL;
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co->co_executors = NULL;
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memcpy(_PyCode_CODE(co), PyBytes_AS_STRING(con->code),
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PyBytes_GET_SIZE(con->code));
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int entry_point = 0;
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while (entry_point < Py_SIZE(co) &&
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_PyCode_CODE(co)[entry_point].op.code != RESUME) {
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entry_point++;
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}
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co->_co_firsttraceable = entry_point;
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_PyCode_Quicken(co);
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notify_code_watchers(PY_CODE_EVENT_CREATE, co);
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}
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static int
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scan_varint(const uint8_t *ptr)
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{
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unsigned int read = *ptr++;
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unsigned int val = read & 63;
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unsigned int shift = 0;
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while (read & 64) {
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read = *ptr++;
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shift += 6;
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val |= (read & 63) << shift;
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}
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return val;
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}
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static int
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scan_signed_varint(const uint8_t *ptr)
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{
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unsigned int uval = scan_varint(ptr);
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if (uval & 1) {
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return -(int)(uval >> 1);
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}
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else {
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return uval >> 1;
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}
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}
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static int
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get_line_delta(const uint8_t *ptr)
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{
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int code = ((*ptr) >> 3) & 15;
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switch (code) {
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case PY_CODE_LOCATION_INFO_NONE:
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return 0;
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case PY_CODE_LOCATION_INFO_NO_COLUMNS:
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case PY_CODE_LOCATION_INFO_LONG:
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return scan_signed_varint(ptr+1);
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case PY_CODE_LOCATION_INFO_ONE_LINE0:
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return 0;
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case PY_CODE_LOCATION_INFO_ONE_LINE1:
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return 1;
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case PY_CODE_LOCATION_INFO_ONE_LINE2:
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return 2;
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default:
|
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/* Same line */
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return 0;
|
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}
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}
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static PyObject *
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remove_column_info(PyObject *locations)
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{
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int offset = 0;
|
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const uint8_t *data = (const uint8_t *)PyBytes_AS_STRING(locations);
|
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PyObject *res = PyBytes_FromStringAndSize(NULL, 32);
|
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if (res == NULL) {
|
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PyErr_NoMemory();
|
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return NULL;
|
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}
|
|
uint8_t *output = (uint8_t *)PyBytes_AS_STRING(res);
|
|
while (offset < PyBytes_GET_SIZE(locations)) {
|
|
Py_ssize_t write_offset = output - (uint8_t *)PyBytes_AS_STRING(res);
|
|
if (write_offset + 16 >= PyBytes_GET_SIZE(res)) {
|
|
if (_PyBytes_Resize(&res, PyBytes_GET_SIZE(res) * 2) < 0) {
|
|
return NULL;
|
|
}
|
|
output = (uint8_t *)PyBytes_AS_STRING(res) + write_offset;
|
|
}
|
|
int code = (data[offset] >> 3) & 15;
|
|
if (code == PY_CODE_LOCATION_INFO_NONE) {
|
|
*output++ = data[offset];
|
|
}
|
|
else {
|
|
int blength = (data[offset] & 7)+1;
|
|
output += write_location_entry_start(
|
|
output, PY_CODE_LOCATION_INFO_NO_COLUMNS, blength);
|
|
int ldelta = get_line_delta(&data[offset]);
|
|
output += write_signed_varint(output, ldelta);
|
|
}
|
|
offset++;
|
|
while (offset < PyBytes_GET_SIZE(locations) &&
|
|
(data[offset] & 128) == 0) {
|
|
offset++;
|
|
}
|
|
}
|
|
Py_ssize_t write_offset = output - (uint8_t *)PyBytes_AS_STRING(res);
|
|
if (_PyBytes_Resize(&res, write_offset)) {
|
|
return NULL;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* The caller is responsible for ensuring that the given data is valid. */
|
|
|
|
PyCodeObject *
|
|
_PyCode_New(struct _PyCodeConstructor *con)
|
|
{
|
|
if (intern_strings(con->names) < 0) {
|
|
return NULL;
|
|
}
|
|
if (intern_string_constants(con->consts, NULL) < 0) {
|
|
return NULL;
|
|
}
|
|
if (intern_strings(con->localsplusnames) < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *replacement_locations = NULL;
|
|
// Compact the linetable if we are opted out of debug
|
|
// ranges.
|
|
if (!_Py_GetConfig()->code_debug_ranges) {
|
|
replacement_locations = remove_column_info(con->linetable);
|
|
if (replacement_locations == NULL) {
|
|
return NULL;
|
|
}
|
|
con->linetable = replacement_locations;
|
|
}
|
|
|
|
Py_ssize_t size = PyBytes_GET_SIZE(con->code) / sizeof(_Py_CODEUNIT);
|
|
PyCodeObject *co = PyObject_NewVar(PyCodeObject, &PyCode_Type, size);
|
|
if (co == NULL) {
|
|
Py_XDECREF(replacement_locations);
|
|
PyErr_NoMemory();
|
|
return NULL;
|
|
}
|
|
init_code(co, con);
|
|
Py_XDECREF(replacement_locations);
|
|
return co;
|
|
}
|
|
|
|
|
|
/******************
|
|
* the legacy "constructors"
|
|
******************/
|
|
|
|
PyCodeObject *
|
|
PyUnstable_Code_NewWithPosOnlyArgs(
|
|
int argcount, int posonlyargcount, int kwonlyargcount,
|
|
int nlocals, int stacksize, int flags,
|
|
PyObject *code, PyObject *consts, PyObject *names,
|
|
PyObject *varnames, PyObject *freevars, PyObject *cellvars,
|
|
PyObject *filename, PyObject *name,
|
|
PyObject *qualname, int firstlineno,
|
|
PyObject *linetable,
|
|
PyObject *exceptiontable)
|
|
{
|
|
PyCodeObject *co = NULL;
|
|
PyObject *localsplusnames = NULL;
|
|
PyObject *localspluskinds = NULL;
|
|
|
|
if (varnames == NULL || !PyTuple_Check(varnames) ||
|
|
cellvars == NULL || !PyTuple_Check(cellvars) ||
|
|
freevars == NULL || !PyTuple_Check(freevars)
|
|
) {
|
|
PyErr_BadInternalCall();
|
|
return NULL;
|
|
}
|
|
|
|
// Set the "fast locals plus" info.
|
|
int nvarnames = (int)PyTuple_GET_SIZE(varnames);
|
|
int ncellvars = (int)PyTuple_GET_SIZE(cellvars);
|
|
int nfreevars = (int)PyTuple_GET_SIZE(freevars);
|
|
int nlocalsplus = nvarnames + ncellvars + nfreevars;
|
|
localsplusnames = PyTuple_New(nlocalsplus);
|
|
if (localsplusnames == NULL) {
|
|
goto error;
|
|
}
|
|
localspluskinds = PyBytes_FromStringAndSize(NULL, nlocalsplus);
|
|
if (localspluskinds == NULL) {
|
|
goto error;
|
|
}
|
|
int offset = 0;
|
|
for (int i = 0; i < nvarnames; i++, offset++) {
|
|
PyObject *name = PyTuple_GET_ITEM(varnames, i);
|
|
_Py_set_localsplus_info(offset, name, CO_FAST_LOCAL,
|
|
localsplusnames, localspluskinds);
|
|
}
|
|
for (int i = 0; i < ncellvars; i++, offset++) {
|
|
PyObject *name = PyTuple_GET_ITEM(cellvars, i);
|
|
int argoffset = -1;
|
|
for (int j = 0; j < nvarnames; j++) {
|
|
int cmp = PyUnicode_Compare(PyTuple_GET_ITEM(varnames, j),
|
|
name);
|
|
assert(!PyErr_Occurred());
|
|
if (cmp == 0) {
|
|
argoffset = j;
|
|
break;
|
|
}
|
|
}
|
|
if (argoffset >= 0) {
|
|
// Merge the localsplus indices.
|
|
nlocalsplus -= 1;
|
|
offset -= 1;
|
|
_PyLocals_Kind kind = _PyLocals_GetKind(localspluskinds, argoffset);
|
|
_PyLocals_SetKind(localspluskinds, argoffset, kind | CO_FAST_CELL);
|
|
continue;
|
|
}
|
|
_Py_set_localsplus_info(offset, name, CO_FAST_CELL,
|
|
localsplusnames, localspluskinds);
|
|
}
|
|
for (int i = 0; i < nfreevars; i++, offset++) {
|
|
PyObject *name = PyTuple_GET_ITEM(freevars, i);
|
|
_Py_set_localsplus_info(offset, name, CO_FAST_FREE,
|
|
localsplusnames, localspluskinds);
|
|
}
|
|
// If any cells were args then nlocalsplus will have shrunk.
|
|
if (nlocalsplus != PyTuple_GET_SIZE(localsplusnames)) {
|
|
if (_PyTuple_Resize(&localsplusnames, nlocalsplus) < 0
|
|
|| _PyBytes_Resize(&localspluskinds, nlocalsplus) < 0) {
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
struct _PyCodeConstructor con = {
|
|
.filename = filename,
|
|
.name = name,
|
|
.qualname = qualname,
|
|
.flags = flags,
|
|
|
|
.code = code,
|
|
.firstlineno = firstlineno,
|
|
.linetable = linetable,
|
|
|
|
.consts = consts,
|
|
.names = names,
|
|
|
|
.localsplusnames = localsplusnames,
|
|
.localspluskinds = localspluskinds,
|
|
|
|
.argcount = argcount,
|
|
.posonlyargcount = posonlyargcount,
|
|
.kwonlyargcount = kwonlyargcount,
|
|
|
|
.stacksize = stacksize,
|
|
|
|
.exceptiontable = exceptiontable,
|
|
};
|
|
|
|
if (_PyCode_Validate(&con) < 0) {
|
|
goto error;
|
|
}
|
|
assert(PyBytes_GET_SIZE(code) % sizeof(_Py_CODEUNIT) == 0);
|
|
assert(_Py_IS_ALIGNED(PyBytes_AS_STRING(code), sizeof(_Py_CODEUNIT)));
|
|
if (nlocals != PyTuple_GET_SIZE(varnames)) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"code: co_nlocals != len(co_varnames)");
|
|
goto error;
|
|
}
|
|
|
|
co = _PyCode_New(&con);
|
|
if (co == NULL) {
|
|
goto error;
|
|
}
|
|
|
|
error:
|
|
Py_XDECREF(localsplusnames);
|
|
Py_XDECREF(localspluskinds);
|
|
return co;
|
|
}
|
|
|
|
PyCodeObject *
|
|
PyUnstable_Code_New(int argcount, int kwonlyargcount,
|
|
int nlocals, int stacksize, int flags,
|
|
PyObject *code, PyObject *consts, PyObject *names,
|
|
PyObject *varnames, PyObject *freevars, PyObject *cellvars,
|
|
PyObject *filename, PyObject *name, PyObject *qualname,
|
|
int firstlineno,
|
|
PyObject *linetable,
|
|
PyObject *exceptiontable)
|
|
{
|
|
return PyCode_NewWithPosOnlyArgs(argcount, 0, kwonlyargcount, nlocals,
|
|
stacksize, flags, code, consts, names,
|
|
varnames, freevars, cellvars, filename,
|
|
name, qualname, firstlineno,
|
|
linetable,
|
|
exceptiontable);
|
|
}
|
|
|
|
// NOTE: When modifying the construction of PyCode_NewEmpty, please also change
|
|
// test.test_code.CodeLocationTest.test_code_new_empty to keep it in sync!
|
|
|
|
static const uint8_t assert0[6] = {
|
|
RESUME, 0,
|
|
LOAD_ASSERTION_ERROR, 0,
|
|
RAISE_VARARGS, 1
|
|
};
|
|
|
|
static const uint8_t linetable[2] = {
|
|
(1 << 7) // New entry.
|
|
| (PY_CODE_LOCATION_INFO_NO_COLUMNS << 3)
|
|
| (3 - 1), // Three code units.
|
|
0, // Offset from co_firstlineno.
|
|
};
|
|
|
|
PyCodeObject *
|
|
PyCode_NewEmpty(const char *filename, const char *funcname, int firstlineno)
|
|
{
|
|
PyObject *nulltuple = NULL;
|
|
PyObject *filename_ob = NULL;
|
|
PyObject *funcname_ob = NULL;
|
|
PyObject *code_ob = NULL;
|
|
PyObject *linetable_ob = NULL;
|
|
PyCodeObject *result = NULL;
|
|
|
|
nulltuple = PyTuple_New(0);
|
|
if (nulltuple == NULL) {
|
|
goto failed;
|
|
}
|
|
funcname_ob = PyUnicode_FromString(funcname);
|
|
if (funcname_ob == NULL) {
|
|
goto failed;
|
|
}
|
|
filename_ob = PyUnicode_DecodeFSDefault(filename);
|
|
if (filename_ob == NULL) {
|
|
goto failed;
|
|
}
|
|
code_ob = PyBytes_FromStringAndSize((const char *)assert0, 6);
|
|
if (code_ob == NULL) {
|
|
goto failed;
|
|
}
|
|
linetable_ob = PyBytes_FromStringAndSize((const char *)linetable, 2);
|
|
if (linetable_ob == NULL) {
|
|
goto failed;
|
|
}
|
|
|
|
#define emptystring (PyObject *)&_Py_SINGLETON(bytes_empty)
|
|
struct _PyCodeConstructor con = {
|
|
.filename = filename_ob,
|
|
.name = funcname_ob,
|
|
.qualname = funcname_ob,
|
|
.code = code_ob,
|
|
.firstlineno = firstlineno,
|
|
.linetable = linetable_ob,
|
|
.consts = nulltuple,
|
|
.names = nulltuple,
|
|
.localsplusnames = nulltuple,
|
|
.localspluskinds = emptystring,
|
|
.exceptiontable = emptystring,
|
|
.stacksize = 1,
|
|
};
|
|
result = _PyCode_New(&con);
|
|
|
|
failed:
|
|
Py_XDECREF(nulltuple);
|
|
Py_XDECREF(funcname_ob);
|
|
Py_XDECREF(filename_ob);
|
|
Py_XDECREF(code_ob);
|
|
Py_XDECREF(linetable_ob);
|
|
return result;
|
|
}
|
|
|
|
|
|
/******************
|
|
* source location tracking (co_lines/co_positions)
|
|
******************/
|
|
|
|
int
|
|
PyCode_Addr2Line(PyCodeObject *co, int addrq)
|
|
{
|
|
if (addrq < 0) {
|
|
return co->co_firstlineno;
|
|
}
|
|
assert(addrq >= 0 && addrq < _PyCode_NBYTES(co));
|
|
PyCodeAddressRange bounds;
|
|
_PyCode_InitAddressRange(co, &bounds);
|
|
return _PyCode_CheckLineNumber(addrq, &bounds);
|
|
}
|
|
|
|
void
|
|
_PyLineTable_InitAddressRange(const char *linetable, Py_ssize_t length, int firstlineno, PyCodeAddressRange *range)
|
|
{
|
|
range->opaque.lo_next = (const uint8_t *)linetable;
|
|
range->opaque.limit = range->opaque.lo_next + length;
|
|
range->ar_start = -1;
|
|
range->ar_end = 0;
|
|
range->opaque.computed_line = firstlineno;
|
|
range->ar_line = -1;
|
|
}
|
|
|
|
int
|
|
_PyCode_InitAddressRange(PyCodeObject* co, PyCodeAddressRange *bounds)
|
|
{
|
|
assert(co->co_linetable != NULL);
|
|
const char *linetable = PyBytes_AS_STRING(co->co_linetable);
|
|
Py_ssize_t length = PyBytes_GET_SIZE(co->co_linetable);
|
|
_PyLineTable_InitAddressRange(linetable, length, co->co_firstlineno, bounds);
|
|
return bounds->ar_line;
|
|
}
|
|
|
|
/* Update *bounds to describe the first and one-past-the-last instructions in
|
|
the same line as lasti. Return the number of that line, or -1 if lasti is out of bounds. */
|
|
int
|
|
_PyCode_CheckLineNumber(int lasti, PyCodeAddressRange *bounds)
|
|
{
|
|
while (bounds->ar_end <= lasti) {
|
|
if (!_PyLineTable_NextAddressRange(bounds)) {
|
|
return -1;
|
|
}
|
|
}
|
|
while (bounds->ar_start > lasti) {
|
|
if (!_PyLineTable_PreviousAddressRange(bounds)) {
|
|
return -1;
|
|
}
|
|
}
|
|
return bounds->ar_line;
|
|
}
|
|
|
|
static int
|
|
is_no_line_marker(uint8_t b)
|
|
{
|
|
return (b >> 3) == 0x1f;
|
|
}
|
|
|
|
|
|
#define ASSERT_VALID_BOUNDS(bounds) \
|
|
assert(bounds->opaque.lo_next <= bounds->opaque.limit && \
|
|
(bounds->ar_line == -1 || bounds->ar_line == bounds->opaque.computed_line) && \
|
|
(bounds->opaque.lo_next == bounds->opaque.limit || \
|
|
(*bounds->opaque.lo_next) & 128))
|
|
|
|
static int
|
|
next_code_delta(PyCodeAddressRange *bounds)
|
|
{
|
|
assert((*bounds->opaque.lo_next) & 128);
|
|
return (((*bounds->opaque.lo_next) & 7) + 1) * sizeof(_Py_CODEUNIT);
|
|
}
|
|
|
|
static int
|
|
previous_code_delta(PyCodeAddressRange *bounds)
|
|
{
|
|
if (bounds->ar_start == 0) {
|
|
// If we looking at the first entry, the
|
|
// "previous" entry has an implicit length of 1.
|
|
return 1;
|
|
}
|
|
const uint8_t *ptr = bounds->opaque.lo_next-1;
|
|
while (((*ptr) & 128) == 0) {
|
|
ptr--;
|
|
}
|
|
return (((*ptr) & 7) + 1) * sizeof(_Py_CODEUNIT);
|
|
}
|
|
|
|
static int
|
|
read_byte(PyCodeAddressRange *bounds)
|
|
{
|
|
return *bounds->opaque.lo_next++;
|
|
}
|
|
|
|
static int
|
|
read_varint(PyCodeAddressRange *bounds)
|
|
{
|
|
unsigned int read = read_byte(bounds);
|
|
unsigned int val = read & 63;
|
|
unsigned int shift = 0;
|
|
while (read & 64) {
|
|
read = read_byte(bounds);
|
|
shift += 6;
|
|
val |= (read & 63) << shift;
|
|
}
|
|
return val;
|
|
}
|
|
|
|
static int
|
|
read_signed_varint(PyCodeAddressRange *bounds)
|
|
{
|
|
unsigned int uval = read_varint(bounds);
|
|
if (uval & 1) {
|
|
return -(int)(uval >> 1);
|
|
}
|
|
else {
|
|
return uval >> 1;
|
|
}
|
|
}
|
|
|
|
static void
|
|
retreat(PyCodeAddressRange *bounds)
|
|
{
|
|
ASSERT_VALID_BOUNDS(bounds);
|
|
assert(bounds->ar_start >= 0);
|
|
do {
|
|
bounds->opaque.lo_next--;
|
|
} while (((*bounds->opaque.lo_next) & 128) == 0);
|
|
bounds->opaque.computed_line -= get_line_delta(bounds->opaque.lo_next);
|
|
bounds->ar_end = bounds->ar_start;
|
|
bounds->ar_start -= previous_code_delta(bounds);
|
|
if (is_no_line_marker(bounds->opaque.lo_next[-1])) {
|
|
bounds->ar_line = -1;
|
|
}
|
|
else {
|
|
bounds->ar_line = bounds->opaque.computed_line;
|
|
}
|
|
ASSERT_VALID_BOUNDS(bounds);
|
|
}
|
|
|
|
static void
|
|
advance(PyCodeAddressRange *bounds)
|
|
{
|
|
ASSERT_VALID_BOUNDS(bounds);
|
|
bounds->opaque.computed_line += get_line_delta(bounds->opaque.lo_next);
|
|
if (is_no_line_marker(*bounds->opaque.lo_next)) {
|
|
bounds->ar_line = -1;
|
|
}
|
|
else {
|
|
bounds->ar_line = bounds->opaque.computed_line;
|
|
}
|
|
bounds->ar_start = bounds->ar_end;
|
|
bounds->ar_end += next_code_delta(bounds);
|
|
do {
|
|
bounds->opaque.lo_next++;
|
|
} while (bounds->opaque.lo_next < bounds->opaque.limit &&
|
|
((*bounds->opaque.lo_next) & 128) == 0);
|
|
ASSERT_VALID_BOUNDS(bounds);
|
|
}
|
|
|
|
static void
|
|
advance_with_locations(PyCodeAddressRange *bounds, int *endline, int *column, int *endcolumn)
|
|
{
|
|
ASSERT_VALID_BOUNDS(bounds);
|
|
int first_byte = read_byte(bounds);
|
|
int code = (first_byte >> 3) & 15;
|
|
bounds->ar_start = bounds->ar_end;
|
|
bounds->ar_end = bounds->ar_start + ((first_byte & 7) + 1) * sizeof(_Py_CODEUNIT);
|
|
switch(code) {
|
|
case PY_CODE_LOCATION_INFO_NONE:
|
|
bounds->ar_line = *endline = -1;
|
|
*column = *endcolumn = -1;
|
|
break;
|
|
case PY_CODE_LOCATION_INFO_LONG:
|
|
{
|
|
bounds->opaque.computed_line += read_signed_varint(bounds);
|
|
bounds->ar_line = bounds->opaque.computed_line;
|
|
*endline = bounds->ar_line + read_varint(bounds);
|
|
*column = read_varint(bounds)-1;
|
|
*endcolumn = read_varint(bounds)-1;
|
|
break;
|
|
}
|
|
case PY_CODE_LOCATION_INFO_NO_COLUMNS:
|
|
{
|
|
/* No column */
|
|
bounds->opaque.computed_line += read_signed_varint(bounds);
|
|
*endline = bounds->ar_line = bounds->opaque.computed_line;
|
|
*column = *endcolumn = -1;
|
|
break;
|
|
}
|
|
case PY_CODE_LOCATION_INFO_ONE_LINE0:
|
|
case PY_CODE_LOCATION_INFO_ONE_LINE1:
|
|
case PY_CODE_LOCATION_INFO_ONE_LINE2:
|
|
{
|
|
/* one line form */
|
|
int line_delta = code - 10;
|
|
bounds->opaque.computed_line += line_delta;
|
|
*endline = bounds->ar_line = bounds->opaque.computed_line;
|
|
*column = read_byte(bounds);
|
|
*endcolumn = read_byte(bounds);
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
/* Short forms */
|
|
int second_byte = read_byte(bounds);
|
|
assert((second_byte & 128) == 0);
|
|
*endline = bounds->ar_line = bounds->opaque.computed_line;
|
|
*column = code << 3 | (second_byte >> 4);
|
|
*endcolumn = *column + (second_byte & 15);
|
|
}
|
|
}
|
|
ASSERT_VALID_BOUNDS(bounds);
|
|
}
|
|
int
|
|
PyCode_Addr2Location(PyCodeObject *co, int addrq,
|
|
int *start_line, int *start_column,
|
|
int *end_line, int *end_column)
|
|
{
|
|
if (addrq < 0) {
|
|
*start_line = *end_line = co->co_firstlineno;
|
|
*start_column = *end_column = 0;
|
|
return 1;
|
|
}
|
|
assert(addrq >= 0 && addrq < _PyCode_NBYTES(co));
|
|
PyCodeAddressRange bounds;
|
|
_PyCode_InitAddressRange(co, &bounds);
|
|
_PyCode_CheckLineNumber(addrq, &bounds);
|
|
retreat(&bounds);
|
|
advance_with_locations(&bounds, end_line, start_column, end_column);
|
|
*start_line = bounds.ar_line;
|
|
return 1;
|
|
}
|
|
|
|
|
|
static inline int
|
|
at_end(PyCodeAddressRange *bounds) {
|
|
return bounds->opaque.lo_next >= bounds->opaque.limit;
|
|
}
|
|
|
|
int
|
|
_PyLineTable_PreviousAddressRange(PyCodeAddressRange *range)
|
|
{
|
|
if (range->ar_start <= 0) {
|
|
return 0;
|
|
}
|
|
retreat(range);
|
|
assert(range->ar_end > range->ar_start);
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
_PyLineTable_NextAddressRange(PyCodeAddressRange *range)
|
|
{
|
|
if (at_end(range)) {
|
|
return 0;
|
|
}
|
|
advance(range);
|
|
assert(range->ar_end > range->ar_start);
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
emit_pair(PyObject **bytes, int *offset, int a, int b)
|
|
{
|
|
Py_ssize_t len = PyBytes_GET_SIZE(*bytes);
|
|
if (*offset + 2 >= len) {
|
|
if (_PyBytes_Resize(bytes, len * 2) < 0)
|
|
return 0;
|
|
}
|
|
unsigned char *lnotab = (unsigned char *) PyBytes_AS_STRING(*bytes);
|
|
lnotab += *offset;
|
|
*lnotab++ = a;
|
|
*lnotab++ = b;
|
|
*offset += 2;
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
emit_delta(PyObject **bytes, int bdelta, int ldelta, int *offset)
|
|
{
|
|
while (bdelta > 255) {
|
|
if (!emit_pair(bytes, offset, 255, 0)) {
|
|
return 0;
|
|
}
|
|
bdelta -= 255;
|
|
}
|
|
while (ldelta > 127) {
|
|
if (!emit_pair(bytes, offset, bdelta, 127)) {
|
|
return 0;
|
|
}
|
|
bdelta = 0;
|
|
ldelta -= 127;
|
|
}
|
|
while (ldelta < -128) {
|
|
if (!emit_pair(bytes, offset, bdelta, -128)) {
|
|
return 0;
|
|
}
|
|
bdelta = 0;
|
|
ldelta += 128;
|
|
}
|
|
return emit_pair(bytes, offset, bdelta, ldelta);
|
|
}
|
|
|
|
static PyObject *
|
|
decode_linetable(PyCodeObject *code)
|
|
{
|
|
PyCodeAddressRange bounds;
|
|
PyObject *bytes;
|
|
int table_offset = 0;
|
|
int code_offset = 0;
|
|
int line = code->co_firstlineno;
|
|
bytes = PyBytes_FromStringAndSize(NULL, 64);
|
|
if (bytes == NULL) {
|
|
return NULL;
|
|
}
|
|
_PyCode_InitAddressRange(code, &bounds);
|
|
while (_PyLineTable_NextAddressRange(&bounds)) {
|
|
if (bounds.opaque.computed_line != line) {
|
|
int bdelta = bounds.ar_start - code_offset;
|
|
int ldelta = bounds.opaque.computed_line - line;
|
|
if (!emit_delta(&bytes, bdelta, ldelta, &table_offset)) {
|
|
Py_DECREF(bytes);
|
|
return NULL;
|
|
}
|
|
code_offset = bounds.ar_start;
|
|
line = bounds.opaque.computed_line;
|
|
}
|
|
}
|
|
_PyBytes_Resize(&bytes, table_offset);
|
|
return bytes;
|
|
}
|
|
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
PyCodeObject *li_code;
|
|
PyCodeAddressRange li_line;
|
|
} lineiterator;
|
|
|
|
|
|
static void
|
|
lineiter_dealloc(lineiterator *li)
|
|
{
|
|
Py_DECREF(li->li_code);
|
|
Py_TYPE(li)->tp_free(li);
|
|
}
|
|
|
|
static PyObject *
|
|
_source_offset_converter(int *value) {
|
|
if (*value == -1) {
|
|
Py_RETURN_NONE;
|
|
}
|
|
return PyLong_FromLong(*value);
|
|
}
|
|
|
|
static PyObject *
|
|
lineiter_next(lineiterator *li)
|
|
{
|
|
PyCodeAddressRange *bounds = &li->li_line;
|
|
if (!_PyLineTable_NextAddressRange(bounds)) {
|
|
return NULL;
|
|
}
|
|
int start = bounds->ar_start;
|
|
int line = bounds->ar_line;
|
|
// Merge overlapping entries:
|
|
while (_PyLineTable_NextAddressRange(bounds)) {
|
|
if (bounds->ar_line != line) {
|
|
_PyLineTable_PreviousAddressRange(bounds);
|
|
break;
|
|
}
|
|
}
|
|
return Py_BuildValue("iiO&", start, bounds->ar_end,
|
|
_source_offset_converter, &line);
|
|
}
|
|
|
|
PyTypeObject _PyLineIterator = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"line_iterator", /* tp_name */
|
|
sizeof(lineiterator), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)lineiter_dealloc, /* tp_dealloc */
|
|
0, /* tp_vectorcall_offset */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_as_async */
|
|
0, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
0, /* tp_hash */
|
|
0, /* tp_call */
|
|
0, /* tp_str */
|
|
0, /* tp_getattro */
|
|
0, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
|
|
0, /* tp_doc */
|
|
0, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
PyObject_SelfIter, /* tp_iter */
|
|
(iternextfunc)lineiter_next, /* tp_iternext */
|
|
0, /* tp_methods */
|
|
0, /* tp_members */
|
|
0, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
0, /* tp_init */
|
|
0, /* tp_alloc */
|
|
0, /* tp_new */
|
|
PyObject_Del, /* tp_free */
|
|
};
|
|
|
|
static lineiterator *
|
|
new_linesiterator(PyCodeObject *code)
|
|
{
|
|
lineiterator *li = (lineiterator *)PyType_GenericAlloc(&_PyLineIterator, 0);
|
|
if (li == NULL) {
|
|
return NULL;
|
|
}
|
|
li->li_code = (PyCodeObject*)Py_NewRef(code);
|
|
_PyCode_InitAddressRange(code, &li->li_line);
|
|
return li;
|
|
}
|
|
|
|
/* co_positions iterator object. */
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
PyCodeObject* pi_code;
|
|
PyCodeAddressRange pi_range;
|
|
int pi_offset;
|
|
int pi_endline;
|
|
int pi_column;
|
|
int pi_endcolumn;
|
|
} positionsiterator;
|
|
|
|
static void
|
|
positionsiter_dealloc(positionsiterator* pi)
|
|
{
|
|
Py_DECREF(pi->pi_code);
|
|
Py_TYPE(pi)->tp_free(pi);
|
|
}
|
|
|
|
static PyObject*
|
|
positionsiter_next(positionsiterator* pi)
|
|
{
|
|
if (pi->pi_offset >= pi->pi_range.ar_end) {
|
|
assert(pi->pi_offset == pi->pi_range.ar_end);
|
|
if (at_end(&pi->pi_range)) {
|
|
return NULL;
|
|
}
|
|
advance_with_locations(&pi->pi_range, &pi->pi_endline, &pi->pi_column, &pi->pi_endcolumn);
|
|
}
|
|
pi->pi_offset += 2;
|
|
return Py_BuildValue("(O&O&O&O&)",
|
|
_source_offset_converter, &pi->pi_range.ar_line,
|
|
_source_offset_converter, &pi->pi_endline,
|
|
_source_offset_converter, &pi->pi_column,
|
|
_source_offset_converter, &pi->pi_endcolumn);
|
|
}
|
|
|
|
PyTypeObject _PyPositionsIterator = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"positions_iterator", /* tp_name */
|
|
sizeof(positionsiterator), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)positionsiter_dealloc, /* tp_dealloc */
|
|
0, /* tp_vectorcall_offset */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_as_async */
|
|
0, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
0, /* tp_hash */
|
|
0, /* tp_call */
|
|
0, /* tp_str */
|
|
0, /* tp_getattro */
|
|
0, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
|
|
0, /* tp_doc */
|
|
0, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
PyObject_SelfIter, /* tp_iter */
|
|
(iternextfunc)positionsiter_next, /* tp_iternext */
|
|
0, /* tp_methods */
|
|
0, /* tp_members */
|
|
0, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
0, /* tp_init */
|
|
0, /* tp_alloc */
|
|
0, /* tp_new */
|
|
PyObject_Del, /* tp_free */
|
|
};
|
|
|
|
static PyObject*
|
|
code_positionsiterator(PyCodeObject* code, PyObject* Py_UNUSED(args))
|
|
{
|
|
positionsiterator* pi = (positionsiterator*)PyType_GenericAlloc(&_PyPositionsIterator, 0);
|
|
if (pi == NULL) {
|
|
return NULL;
|
|
}
|
|
pi->pi_code = (PyCodeObject*)Py_NewRef(code);
|
|
_PyCode_InitAddressRange(code, &pi->pi_range);
|
|
pi->pi_offset = pi->pi_range.ar_end;
|
|
return (PyObject*)pi;
|
|
}
|
|
|
|
|
|
/******************
|
|
* "extra" frame eval info (see PEP 523)
|
|
******************/
|
|
|
|
/* Holder for co_extra information */
|
|
typedef struct {
|
|
Py_ssize_t ce_size;
|
|
void *ce_extras[1];
|
|
} _PyCodeObjectExtra;
|
|
|
|
|
|
int
|
|
PyUnstable_Code_GetExtra(PyObject *code, Py_ssize_t index, void **extra)
|
|
{
|
|
if (!PyCode_Check(code)) {
|
|
PyErr_BadInternalCall();
|
|
return -1;
|
|
}
|
|
|
|
PyCodeObject *o = (PyCodeObject*) code;
|
|
_PyCodeObjectExtra *co_extra = (_PyCodeObjectExtra*) o->co_extra;
|
|
|
|
if (co_extra == NULL || index < 0 || co_extra->ce_size <= index) {
|
|
*extra = NULL;
|
|
return 0;
|
|
}
|
|
|
|
*extra = co_extra->ce_extras[index];
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
PyUnstable_Code_SetExtra(PyObject *code, Py_ssize_t index, void *extra)
|
|
{
|
|
PyInterpreterState *interp = _PyInterpreterState_GET();
|
|
|
|
if (!PyCode_Check(code) || index < 0 ||
|
|
index >= interp->co_extra_user_count) {
|
|
PyErr_BadInternalCall();
|
|
return -1;
|
|
}
|
|
|
|
PyCodeObject *o = (PyCodeObject*) code;
|
|
_PyCodeObjectExtra *co_extra = (_PyCodeObjectExtra *) o->co_extra;
|
|
|
|
if (co_extra == NULL || co_extra->ce_size <= index) {
|
|
Py_ssize_t i = (co_extra == NULL ? 0 : co_extra->ce_size);
|
|
co_extra = PyMem_Realloc(
|
|
co_extra,
|
|
sizeof(_PyCodeObjectExtra) +
|
|
(interp->co_extra_user_count-1) * sizeof(void*));
|
|
if (co_extra == NULL) {
|
|
return -1;
|
|
}
|
|
for (; i < interp->co_extra_user_count; i++) {
|
|
co_extra->ce_extras[i] = NULL;
|
|
}
|
|
co_extra->ce_size = interp->co_extra_user_count;
|
|
o->co_extra = co_extra;
|
|
}
|
|
|
|
if (co_extra->ce_extras[index] != NULL) {
|
|
freefunc free = interp->co_extra_freefuncs[index];
|
|
if (free != NULL) {
|
|
free(co_extra->ce_extras[index]);
|
|
}
|
|
}
|
|
|
|
co_extra->ce_extras[index] = extra;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/******************
|
|
* other PyCodeObject accessor functions
|
|
******************/
|
|
|
|
static PyObject *
|
|
get_cached_locals(PyCodeObject *co, PyObject **cached_field,
|
|
_PyLocals_Kind kind, int num)
|
|
{
|
|
assert(cached_field != NULL);
|
|
assert(co->_co_cached != NULL);
|
|
if (*cached_field != NULL) {
|
|
return Py_NewRef(*cached_field);
|
|
}
|
|
assert(*cached_field == NULL);
|
|
PyObject *varnames = get_localsplus_names(co, kind, num);
|
|
if (varnames == NULL) {
|
|
return NULL;
|
|
}
|
|
*cached_field = Py_NewRef(varnames);
|
|
return varnames;
|
|
}
|
|
|
|
PyObject *
|
|
_PyCode_GetVarnames(PyCodeObject *co)
|
|
{
|
|
if (init_co_cached(co)) {
|
|
return NULL;
|
|
}
|
|
return get_cached_locals(co, &co->_co_cached->_co_varnames, CO_FAST_LOCAL, co->co_nlocals);
|
|
}
|
|
|
|
PyObject *
|
|
PyCode_GetVarnames(PyCodeObject *code)
|
|
{
|
|
return _PyCode_GetVarnames(code);
|
|
}
|
|
|
|
PyObject *
|
|
_PyCode_GetCellvars(PyCodeObject *co)
|
|
{
|
|
if (init_co_cached(co)) {
|
|
return NULL;
|
|
}
|
|
return get_cached_locals(co, &co->_co_cached->_co_cellvars, CO_FAST_CELL, co->co_ncellvars);
|
|
}
|
|
|
|
PyObject *
|
|
PyCode_GetCellvars(PyCodeObject *code)
|
|
{
|
|
return _PyCode_GetCellvars(code);
|
|
}
|
|
|
|
PyObject *
|
|
_PyCode_GetFreevars(PyCodeObject *co)
|
|
{
|
|
if (init_co_cached(co)) {
|
|
return NULL;
|
|
}
|
|
return get_cached_locals(co, &co->_co_cached->_co_freevars, CO_FAST_FREE, co->co_nfreevars);
|
|
}
|
|
|
|
PyObject *
|
|
PyCode_GetFreevars(PyCodeObject *code)
|
|
{
|
|
return _PyCode_GetFreevars(code);
|
|
}
|
|
|
|
static void
|
|
clear_executors(PyCodeObject *co)
|
|
{
|
|
for (int i = 0; i < co->co_executors->size; i++) {
|
|
Py_CLEAR(co->co_executors->executors[i]);
|
|
}
|
|
PyMem_Free(co->co_executors);
|
|
co->co_executors = NULL;
|
|
}
|
|
|
|
static void
|
|
deopt_code(PyCodeObject *code, _Py_CODEUNIT *instructions)
|
|
{
|
|
Py_ssize_t len = Py_SIZE(code);
|
|
for (int i = 0; i < len; i++) {
|
|
int opcode = _Py_GetBaseOpcode(code, i);
|
|
if (opcode == ENTER_EXECUTOR) {
|
|
_PyExecutorObject *exec = code->co_executors->executors[instructions[i].op.arg];
|
|
opcode = exec->vm_data.opcode;
|
|
instructions[i].op.arg = exec->vm_data.oparg;
|
|
}
|
|
assert(opcode != ENTER_EXECUTOR);
|
|
int caches = _PyOpcode_Caches[opcode];
|
|
instructions[i].op.code = opcode;
|
|
for (int j = 1; j <= caches; j++) {
|
|
instructions[i+j].cache = 0;
|
|
}
|
|
i += caches;
|
|
}
|
|
}
|
|
|
|
PyObject *
|
|
_PyCode_GetCode(PyCodeObject *co)
|
|
{
|
|
if (init_co_cached(co)) {
|
|
return NULL;
|
|
}
|
|
if (co->_co_cached->_co_code != NULL) {
|
|
return Py_NewRef(co->_co_cached->_co_code);
|
|
}
|
|
PyObject *code = PyBytes_FromStringAndSize((const char *)_PyCode_CODE(co),
|
|
_PyCode_NBYTES(co));
|
|
if (code == NULL) {
|
|
return NULL;
|
|
}
|
|
deopt_code(co, (_Py_CODEUNIT *)PyBytes_AS_STRING(code));
|
|
assert(co->_co_cached->_co_code == NULL);
|
|
co->_co_cached->_co_code = Py_NewRef(code);
|
|
return code;
|
|
}
|
|
|
|
PyObject *
|
|
PyCode_GetCode(PyCodeObject *co)
|
|
{
|
|
return _PyCode_GetCode(co);
|
|
}
|
|
|
|
/******************
|
|
* PyCode_Type
|
|
******************/
|
|
|
|
/*[clinic input]
|
|
class code "PyCodeObject *" "&PyCode_Type"
|
|
[clinic start generated code]*/
|
|
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=78aa5d576683bb4b]*/
|
|
|
|
/*[clinic input]
|
|
@classmethod
|
|
code.__new__ as code_new
|
|
|
|
argcount: int
|
|
posonlyargcount: int
|
|
kwonlyargcount: int
|
|
nlocals: int
|
|
stacksize: int
|
|
flags: int
|
|
codestring as code: object(subclass_of="&PyBytes_Type")
|
|
constants as consts: object(subclass_of="&PyTuple_Type")
|
|
names: object(subclass_of="&PyTuple_Type")
|
|
varnames: object(subclass_of="&PyTuple_Type")
|
|
filename: unicode
|
|
name: unicode
|
|
qualname: unicode
|
|
firstlineno: int
|
|
linetable: object(subclass_of="&PyBytes_Type")
|
|
exceptiontable: object(subclass_of="&PyBytes_Type")
|
|
freevars: object(subclass_of="&PyTuple_Type", c_default="NULL") = ()
|
|
cellvars: object(subclass_of="&PyTuple_Type", c_default="NULL") = ()
|
|
/
|
|
|
|
Create a code object. Not for the faint of heart.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
code_new_impl(PyTypeObject *type, int argcount, int posonlyargcount,
|
|
int kwonlyargcount, int nlocals, int stacksize, int flags,
|
|
PyObject *code, PyObject *consts, PyObject *names,
|
|
PyObject *varnames, PyObject *filename, PyObject *name,
|
|
PyObject *qualname, int firstlineno, PyObject *linetable,
|
|
PyObject *exceptiontable, PyObject *freevars,
|
|
PyObject *cellvars)
|
|
/*[clinic end generated code: output=069fa20d299f9dda input=e31da3c41ad8064a]*/
|
|
{
|
|
PyObject *co = NULL;
|
|
PyObject *ournames = NULL;
|
|
PyObject *ourvarnames = NULL;
|
|
PyObject *ourfreevars = NULL;
|
|
PyObject *ourcellvars = NULL;
|
|
|
|
if (PySys_Audit("code.__new__", "OOOiiiiii",
|
|
code, filename, name, argcount, posonlyargcount,
|
|
kwonlyargcount, nlocals, stacksize, flags) < 0) {
|
|
goto cleanup;
|
|
}
|
|
|
|
if (argcount < 0) {
|
|
PyErr_SetString(
|
|
PyExc_ValueError,
|
|
"code: argcount must not be negative");
|
|
goto cleanup;
|
|
}
|
|
|
|
if (posonlyargcount < 0) {
|
|
PyErr_SetString(
|
|
PyExc_ValueError,
|
|
"code: posonlyargcount must not be negative");
|
|
goto cleanup;
|
|
}
|
|
|
|
if (kwonlyargcount < 0) {
|
|
PyErr_SetString(
|
|
PyExc_ValueError,
|
|
"code: kwonlyargcount must not be negative");
|
|
goto cleanup;
|
|
}
|
|
if (nlocals < 0) {
|
|
PyErr_SetString(
|
|
PyExc_ValueError,
|
|
"code: nlocals must not be negative");
|
|
goto cleanup;
|
|
}
|
|
|
|
ournames = validate_and_copy_tuple(names);
|
|
if (ournames == NULL)
|
|
goto cleanup;
|
|
ourvarnames = validate_and_copy_tuple(varnames);
|
|
if (ourvarnames == NULL)
|
|
goto cleanup;
|
|
if (freevars)
|
|
ourfreevars = validate_and_copy_tuple(freevars);
|
|
else
|
|
ourfreevars = PyTuple_New(0);
|
|
if (ourfreevars == NULL)
|
|
goto cleanup;
|
|
if (cellvars)
|
|
ourcellvars = validate_and_copy_tuple(cellvars);
|
|
else
|
|
ourcellvars = PyTuple_New(0);
|
|
if (ourcellvars == NULL)
|
|
goto cleanup;
|
|
|
|
co = (PyObject *)PyCode_NewWithPosOnlyArgs(argcount, posonlyargcount,
|
|
kwonlyargcount,
|
|
nlocals, stacksize, flags,
|
|
code, consts, ournames,
|
|
ourvarnames, ourfreevars,
|
|
ourcellvars, filename,
|
|
name, qualname, firstlineno,
|
|
linetable,
|
|
exceptiontable
|
|
);
|
|
cleanup:
|
|
Py_XDECREF(ournames);
|
|
Py_XDECREF(ourvarnames);
|
|
Py_XDECREF(ourfreevars);
|
|
Py_XDECREF(ourcellvars);
|
|
return co;
|
|
}
|
|
|
|
static void
|
|
free_monitoring_data(_PyCoMonitoringData *data)
|
|
{
|
|
if (data == NULL) {
|
|
return;
|
|
}
|
|
if (data->tools) {
|
|
PyMem_Free(data->tools);
|
|
}
|
|
if (data->lines) {
|
|
PyMem_Free(data->lines);
|
|
}
|
|
if (data->line_tools) {
|
|
PyMem_Free(data->line_tools);
|
|
}
|
|
if (data->per_instruction_opcodes) {
|
|
PyMem_Free(data->per_instruction_opcodes);
|
|
}
|
|
if (data->per_instruction_tools) {
|
|
PyMem_Free(data->per_instruction_tools);
|
|
}
|
|
PyMem_Free(data);
|
|
}
|
|
|
|
static void
|
|
code_dealloc(PyCodeObject *co)
|
|
{
|
|
assert(Py_REFCNT(co) == 0);
|
|
Py_SET_REFCNT(co, 1);
|
|
notify_code_watchers(PY_CODE_EVENT_DESTROY, co);
|
|
if (Py_REFCNT(co) > 1) {
|
|
Py_SET_REFCNT(co, Py_REFCNT(co) - 1);
|
|
return;
|
|
}
|
|
Py_SET_REFCNT(co, 0);
|
|
|
|
if (co->co_extra != NULL) {
|
|
PyInterpreterState *interp = _PyInterpreterState_GET();
|
|
_PyCodeObjectExtra *co_extra = co->co_extra;
|
|
|
|
for (Py_ssize_t i = 0; i < co_extra->ce_size; i++) {
|
|
freefunc free_extra = interp->co_extra_freefuncs[i];
|
|
|
|
if (free_extra != NULL) {
|
|
free_extra(co_extra->ce_extras[i]);
|
|
}
|
|
}
|
|
|
|
PyMem_Free(co_extra);
|
|
}
|
|
if (co->co_executors != NULL) {
|
|
clear_executors(co);
|
|
}
|
|
|
|
Py_XDECREF(co->co_consts);
|
|
Py_XDECREF(co->co_names);
|
|
Py_XDECREF(co->co_localsplusnames);
|
|
Py_XDECREF(co->co_localspluskinds);
|
|
Py_XDECREF(co->co_filename);
|
|
Py_XDECREF(co->co_name);
|
|
Py_XDECREF(co->co_qualname);
|
|
Py_XDECREF(co->co_linetable);
|
|
Py_XDECREF(co->co_exceptiontable);
|
|
if (co->_co_cached != NULL) {
|
|
Py_XDECREF(co->_co_cached->_co_code);
|
|
Py_XDECREF(co->_co_cached->_co_cellvars);
|
|
Py_XDECREF(co->_co_cached->_co_freevars);
|
|
Py_XDECREF(co->_co_cached->_co_varnames);
|
|
PyMem_Free(co->_co_cached);
|
|
}
|
|
if (co->co_weakreflist != NULL) {
|
|
PyObject_ClearWeakRefs((PyObject*)co);
|
|
}
|
|
free_monitoring_data(co->_co_monitoring);
|
|
PyObject_Free(co);
|
|
}
|
|
|
|
static PyObject *
|
|
code_repr(PyCodeObject *co)
|
|
{
|
|
int lineno;
|
|
if (co->co_firstlineno != 0)
|
|
lineno = co->co_firstlineno;
|
|
else
|
|
lineno = -1;
|
|
if (co->co_filename && PyUnicode_Check(co->co_filename)) {
|
|
return PyUnicode_FromFormat(
|
|
"<code object %U at %p, file \"%U\", line %d>",
|
|
co->co_name, co, co->co_filename, lineno);
|
|
} else {
|
|
return PyUnicode_FromFormat(
|
|
"<code object %U at %p, file ???, line %d>",
|
|
co->co_name, co, lineno);
|
|
}
|
|
}
|
|
|
|
static PyObject *
|
|
code_richcompare(PyObject *self, PyObject *other, int op)
|
|
{
|
|
PyCodeObject *co, *cp;
|
|
int eq;
|
|
PyObject *consts1, *consts2;
|
|
PyObject *res;
|
|
|
|
if ((op != Py_EQ && op != Py_NE) ||
|
|
!PyCode_Check(self) ||
|
|
!PyCode_Check(other)) {
|
|
Py_RETURN_NOTIMPLEMENTED;
|
|
}
|
|
|
|
co = (PyCodeObject *)self;
|
|
cp = (PyCodeObject *)other;
|
|
|
|
eq = PyObject_RichCompareBool(co->co_name, cp->co_name, Py_EQ);
|
|
if (!eq) goto unequal;
|
|
eq = co->co_argcount == cp->co_argcount;
|
|
if (!eq) goto unequal;
|
|
eq = co->co_posonlyargcount == cp->co_posonlyargcount;
|
|
if (!eq) goto unequal;
|
|
eq = co->co_kwonlyargcount == cp->co_kwonlyargcount;
|
|
if (!eq) goto unequal;
|
|
eq = co->co_flags == cp->co_flags;
|
|
if (!eq) goto unequal;
|
|
eq = co->co_firstlineno == cp->co_firstlineno;
|
|
if (!eq) goto unequal;
|
|
eq = Py_SIZE(co) == Py_SIZE(cp);
|
|
if (!eq) {
|
|
goto unequal;
|
|
}
|
|
for (int i = 0; i < Py_SIZE(co); i++) {
|
|
_Py_CODEUNIT co_instr = _PyCode_CODE(co)[i];
|
|
_Py_CODEUNIT cp_instr = _PyCode_CODE(cp)[i];
|
|
co_instr.op.code = _PyOpcode_Deopt[co_instr.op.code];
|
|
cp_instr.op.code = _PyOpcode_Deopt[cp_instr.op.code];
|
|
eq = co_instr.cache == cp_instr.cache;
|
|
if (!eq) {
|
|
goto unequal;
|
|
}
|
|
i += _PyOpcode_Caches[co_instr.op.code];
|
|
}
|
|
|
|
/* compare constants */
|
|
consts1 = _PyCode_ConstantKey(co->co_consts);
|
|
if (!consts1)
|
|
return NULL;
|
|
consts2 = _PyCode_ConstantKey(cp->co_consts);
|
|
if (!consts2) {
|
|
Py_DECREF(consts1);
|
|
return NULL;
|
|
}
|
|
eq = PyObject_RichCompareBool(consts1, consts2, Py_EQ);
|
|
Py_DECREF(consts1);
|
|
Py_DECREF(consts2);
|
|
if (eq <= 0) goto unequal;
|
|
|
|
eq = PyObject_RichCompareBool(co->co_names, cp->co_names, Py_EQ);
|
|
if (eq <= 0) goto unequal;
|
|
eq = PyObject_RichCompareBool(co->co_localsplusnames,
|
|
cp->co_localsplusnames, Py_EQ);
|
|
if (eq <= 0) goto unequal;
|
|
eq = PyObject_RichCompareBool(co->co_linetable, cp->co_linetable, Py_EQ);
|
|
if (eq <= 0) {
|
|
goto unequal;
|
|
}
|
|
eq = PyObject_RichCompareBool(co->co_exceptiontable,
|
|
cp->co_exceptiontable, Py_EQ);
|
|
if (eq <= 0) {
|
|
goto unequal;
|
|
}
|
|
|
|
if (op == Py_EQ)
|
|
res = Py_True;
|
|
else
|
|
res = Py_False;
|
|
goto done;
|
|
|
|
unequal:
|
|
if (eq < 0)
|
|
return NULL;
|
|
if (op == Py_NE)
|
|
res = Py_True;
|
|
else
|
|
res = Py_False;
|
|
|
|
done:
|
|
return Py_NewRef(res);
|
|
}
|
|
|
|
static Py_hash_t
|
|
code_hash(PyCodeObject *co)
|
|
{
|
|
Py_uhash_t uhash = 20221211;
|
|
#define SCRAMBLE_IN(H) do { \
|
|
uhash ^= (Py_uhash_t)(H); \
|
|
uhash *= _PyHASH_MULTIPLIER; \
|
|
} while (0)
|
|
#define SCRAMBLE_IN_HASH(EXPR) do { \
|
|
Py_hash_t h = PyObject_Hash(EXPR); \
|
|
if (h == -1) { \
|
|
return -1; \
|
|
} \
|
|
SCRAMBLE_IN(h); \
|
|
} while (0)
|
|
|
|
SCRAMBLE_IN_HASH(co->co_name);
|
|
SCRAMBLE_IN_HASH(co->co_consts);
|
|
SCRAMBLE_IN_HASH(co->co_names);
|
|
SCRAMBLE_IN_HASH(co->co_localsplusnames);
|
|
SCRAMBLE_IN_HASH(co->co_linetable);
|
|
SCRAMBLE_IN_HASH(co->co_exceptiontable);
|
|
SCRAMBLE_IN(co->co_argcount);
|
|
SCRAMBLE_IN(co->co_posonlyargcount);
|
|
SCRAMBLE_IN(co->co_kwonlyargcount);
|
|
SCRAMBLE_IN(co->co_flags);
|
|
SCRAMBLE_IN(co->co_firstlineno);
|
|
SCRAMBLE_IN(Py_SIZE(co));
|
|
for (int i = 0; i < Py_SIZE(co); i++) {
|
|
int deop = _Py_GetBaseOpcode(co, i);
|
|
SCRAMBLE_IN(deop);
|
|
SCRAMBLE_IN(_PyCode_CODE(co)[i].op.arg);
|
|
i += _PyOpcode_Caches[deop];
|
|
}
|
|
if ((Py_hash_t)uhash == -1) {
|
|
return -2;
|
|
}
|
|
return (Py_hash_t)uhash;
|
|
}
|
|
|
|
|
|
#define OFF(x) offsetof(PyCodeObject, x)
|
|
|
|
static PyMemberDef code_memberlist[] = {
|
|
{"co_argcount", Py_T_INT, OFF(co_argcount), Py_READONLY},
|
|
{"co_posonlyargcount", Py_T_INT, OFF(co_posonlyargcount), Py_READONLY},
|
|
{"co_kwonlyargcount", Py_T_INT, OFF(co_kwonlyargcount), Py_READONLY},
|
|
{"co_stacksize", Py_T_INT, OFF(co_stacksize), Py_READONLY},
|
|
{"co_flags", Py_T_INT, OFF(co_flags), Py_READONLY},
|
|
{"co_nlocals", Py_T_INT, OFF(co_nlocals), Py_READONLY},
|
|
{"co_consts", _Py_T_OBJECT, OFF(co_consts), Py_READONLY},
|
|
{"co_names", _Py_T_OBJECT, OFF(co_names), Py_READONLY},
|
|
{"co_filename", _Py_T_OBJECT, OFF(co_filename), Py_READONLY},
|
|
{"co_name", _Py_T_OBJECT, OFF(co_name), Py_READONLY},
|
|
{"co_qualname", _Py_T_OBJECT, OFF(co_qualname), Py_READONLY},
|
|
{"co_firstlineno", Py_T_INT, OFF(co_firstlineno), Py_READONLY},
|
|
{"co_linetable", _Py_T_OBJECT, OFF(co_linetable), Py_READONLY},
|
|
{"co_exceptiontable", _Py_T_OBJECT, OFF(co_exceptiontable), Py_READONLY},
|
|
{NULL} /* Sentinel */
|
|
};
|
|
|
|
|
|
static PyObject *
|
|
code_getlnotab(PyCodeObject *code, void *closure)
|
|
{
|
|
if (PyErr_WarnEx(PyExc_DeprecationWarning,
|
|
"co_lnotab is deprecated, use co_lines instead.",
|
|
1) < 0) {
|
|
return NULL;
|
|
}
|
|
return decode_linetable(code);
|
|
}
|
|
|
|
static PyObject *
|
|
code_getvarnames(PyCodeObject *code, void *closure)
|
|
{
|
|
return _PyCode_GetVarnames(code);
|
|
}
|
|
|
|
static PyObject *
|
|
code_getcellvars(PyCodeObject *code, void *closure)
|
|
{
|
|
return _PyCode_GetCellvars(code);
|
|
}
|
|
|
|
static PyObject *
|
|
code_getfreevars(PyCodeObject *code, void *closure)
|
|
{
|
|
return _PyCode_GetFreevars(code);
|
|
}
|
|
|
|
static PyObject *
|
|
code_getcodeadaptive(PyCodeObject *code, void *closure)
|
|
{
|
|
return PyBytes_FromStringAndSize(code->co_code_adaptive,
|
|
_PyCode_NBYTES(code));
|
|
}
|
|
|
|
static PyObject *
|
|
code_getcode(PyCodeObject *code, void *closure)
|
|
{
|
|
return _PyCode_GetCode(code);
|
|
}
|
|
|
|
static PyGetSetDef code_getsetlist[] = {
|
|
{"co_lnotab", (getter)code_getlnotab, NULL, NULL},
|
|
{"_co_code_adaptive", (getter)code_getcodeadaptive, NULL, NULL},
|
|
// The following old names are kept for backward compatibility.
|
|
{"co_varnames", (getter)code_getvarnames, NULL, NULL},
|
|
{"co_cellvars", (getter)code_getcellvars, NULL, NULL},
|
|
{"co_freevars", (getter)code_getfreevars, NULL, NULL},
|
|
{"co_code", (getter)code_getcode, NULL, NULL},
|
|
{0}
|
|
};
|
|
|
|
|
|
static PyObject *
|
|
code_sizeof(PyCodeObject *co, PyObject *Py_UNUSED(args))
|
|
{
|
|
size_t res = _PyObject_VAR_SIZE(Py_TYPE(co), Py_SIZE(co));
|
|
_PyCodeObjectExtra *co_extra = (_PyCodeObjectExtra*) co->co_extra;
|
|
if (co_extra != NULL) {
|
|
res += sizeof(_PyCodeObjectExtra);
|
|
res += ((size_t)co_extra->ce_size - 1) * sizeof(co_extra->ce_extras[0]);
|
|
}
|
|
return PyLong_FromSize_t(res);
|
|
}
|
|
|
|
static PyObject *
|
|
code_linesiterator(PyCodeObject *code, PyObject *Py_UNUSED(args))
|
|
{
|
|
return (PyObject *)new_linesiterator(code);
|
|
}
|
|
|
|
/*[clinic input]
|
|
@text_signature "($self, /, **changes)"
|
|
code.replace
|
|
|
|
*
|
|
co_argcount: int(c_default="self->co_argcount") = unchanged
|
|
co_posonlyargcount: int(c_default="self->co_posonlyargcount") = unchanged
|
|
co_kwonlyargcount: int(c_default="self->co_kwonlyargcount") = unchanged
|
|
co_nlocals: int(c_default="self->co_nlocals") = unchanged
|
|
co_stacksize: int(c_default="self->co_stacksize") = unchanged
|
|
co_flags: int(c_default="self->co_flags") = unchanged
|
|
co_firstlineno: int(c_default="self->co_firstlineno") = unchanged
|
|
co_code: object(subclass_of="&PyBytes_Type", c_default="NULL") = unchanged
|
|
co_consts: object(subclass_of="&PyTuple_Type", c_default="self->co_consts") = unchanged
|
|
co_names: object(subclass_of="&PyTuple_Type", c_default="self->co_names") = unchanged
|
|
co_varnames: object(subclass_of="&PyTuple_Type", c_default="NULL") = unchanged
|
|
co_freevars: object(subclass_of="&PyTuple_Type", c_default="NULL") = unchanged
|
|
co_cellvars: object(subclass_of="&PyTuple_Type", c_default="NULL") = unchanged
|
|
co_filename: unicode(c_default="self->co_filename") = unchanged
|
|
co_name: unicode(c_default="self->co_name") = unchanged
|
|
co_qualname: unicode(c_default="self->co_qualname") = unchanged
|
|
co_linetable: object(subclass_of="&PyBytes_Type", c_default="self->co_linetable") = unchanged
|
|
co_exceptiontable: object(subclass_of="&PyBytes_Type", c_default="self->co_exceptiontable") = unchanged
|
|
|
|
Return a copy of the code object with new values for the specified fields.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
code_replace_impl(PyCodeObject *self, int co_argcount,
|
|
int co_posonlyargcount, int co_kwonlyargcount,
|
|
int co_nlocals, int co_stacksize, int co_flags,
|
|
int co_firstlineno, PyObject *co_code, PyObject *co_consts,
|
|
PyObject *co_names, PyObject *co_varnames,
|
|
PyObject *co_freevars, PyObject *co_cellvars,
|
|
PyObject *co_filename, PyObject *co_name,
|
|
PyObject *co_qualname, PyObject *co_linetable,
|
|
PyObject *co_exceptiontable)
|
|
/*[clinic end generated code: output=e75c48a15def18b9 input=18e280e07846c122]*/
|
|
{
|
|
#define CHECK_INT_ARG(ARG) \
|
|
if (ARG < 0) { \
|
|
PyErr_SetString(PyExc_ValueError, \
|
|
#ARG " must be a positive integer"); \
|
|
return NULL; \
|
|
}
|
|
|
|
CHECK_INT_ARG(co_argcount);
|
|
CHECK_INT_ARG(co_posonlyargcount);
|
|
CHECK_INT_ARG(co_kwonlyargcount);
|
|
CHECK_INT_ARG(co_nlocals);
|
|
CHECK_INT_ARG(co_stacksize);
|
|
CHECK_INT_ARG(co_flags);
|
|
CHECK_INT_ARG(co_firstlineno);
|
|
|
|
#undef CHECK_INT_ARG
|
|
|
|
PyObject *code = NULL;
|
|
if (co_code == NULL) {
|
|
code = _PyCode_GetCode(self);
|
|
if (code == NULL) {
|
|
return NULL;
|
|
}
|
|
co_code = code;
|
|
}
|
|
|
|
if (PySys_Audit("code.__new__", "OOOiiiiii",
|
|
co_code, co_filename, co_name, co_argcount,
|
|
co_posonlyargcount, co_kwonlyargcount, co_nlocals,
|
|
co_stacksize, co_flags) < 0) {
|
|
Py_XDECREF(code);
|
|
return NULL;
|
|
}
|
|
|
|
PyCodeObject *co = NULL;
|
|
PyObject *varnames = NULL;
|
|
PyObject *cellvars = NULL;
|
|
PyObject *freevars = NULL;
|
|
if (co_varnames == NULL) {
|
|
varnames = get_localsplus_names(self, CO_FAST_LOCAL, self->co_nlocals);
|
|
if (varnames == NULL) {
|
|
goto error;
|
|
}
|
|
co_varnames = varnames;
|
|
}
|
|
if (co_cellvars == NULL) {
|
|
cellvars = get_localsplus_names(self, CO_FAST_CELL, self->co_ncellvars);
|
|
if (cellvars == NULL) {
|
|
goto error;
|
|
}
|
|
co_cellvars = cellvars;
|
|
}
|
|
if (co_freevars == NULL) {
|
|
freevars = get_localsplus_names(self, CO_FAST_FREE, self->co_nfreevars);
|
|
if (freevars == NULL) {
|
|
goto error;
|
|
}
|
|
co_freevars = freevars;
|
|
}
|
|
|
|
co = PyCode_NewWithPosOnlyArgs(
|
|
co_argcount, co_posonlyargcount, co_kwonlyargcount, co_nlocals,
|
|
co_stacksize, co_flags, co_code, co_consts, co_names,
|
|
co_varnames, co_freevars, co_cellvars, co_filename, co_name,
|
|
co_qualname, co_firstlineno,
|
|
co_linetable, co_exceptiontable);
|
|
|
|
error:
|
|
Py_XDECREF(code);
|
|
Py_XDECREF(varnames);
|
|
Py_XDECREF(cellvars);
|
|
Py_XDECREF(freevars);
|
|
return (PyObject *)co;
|
|
}
|
|
|
|
/*[clinic input]
|
|
code._varname_from_oparg
|
|
|
|
oparg: int
|
|
|
|
(internal-only) Return the local variable name for the given oparg.
|
|
|
|
WARNING: this method is for internal use only and may change or go away.
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
code__varname_from_oparg_impl(PyCodeObject *self, int oparg)
|
|
/*[clinic end generated code: output=1fd1130413184206 input=c5fa3ee9bac7d4ca]*/
|
|
{
|
|
PyObject *name = PyTuple_GetItem(self->co_localsplusnames, oparg);
|
|
if (name == NULL) {
|
|
return NULL;
|
|
}
|
|
return Py_NewRef(name);
|
|
}
|
|
|
|
/* XXX code objects need to participate in GC? */
|
|
|
|
static struct PyMethodDef code_methods[] = {
|
|
{"__sizeof__", (PyCFunction)code_sizeof, METH_NOARGS},
|
|
{"co_lines", (PyCFunction)code_linesiterator, METH_NOARGS},
|
|
{"co_positions", (PyCFunction)code_positionsiterator, METH_NOARGS},
|
|
CODE_REPLACE_METHODDEF
|
|
CODE__VARNAME_FROM_OPARG_METHODDEF
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
|
|
PyTypeObject PyCode_Type = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"code",
|
|
offsetof(PyCodeObject, co_code_adaptive),
|
|
sizeof(_Py_CODEUNIT),
|
|
(destructor)code_dealloc, /* tp_dealloc */
|
|
0, /* tp_vectorcall_offset */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_as_async */
|
|
(reprfunc)code_repr, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
(hashfunc)code_hash, /* tp_hash */
|
|
0, /* tp_call */
|
|
0, /* tp_str */
|
|
PyObject_GenericGetAttr, /* tp_getattro */
|
|
0, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT, /* tp_flags */
|
|
code_new__doc__, /* tp_doc */
|
|
0, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
code_richcompare, /* tp_richcompare */
|
|
offsetof(PyCodeObject, co_weakreflist), /* tp_weaklistoffset */
|
|
0, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
code_methods, /* tp_methods */
|
|
code_memberlist, /* tp_members */
|
|
code_getsetlist, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
0, /* tp_init */
|
|
0, /* tp_alloc */
|
|
code_new, /* tp_new */
|
|
};
|
|
|
|
|
|
/******************
|
|
* other API
|
|
******************/
|
|
|
|
PyObject*
|
|
_PyCode_ConstantKey(PyObject *op)
|
|
{
|
|
PyObject *key;
|
|
|
|
/* Py_None and Py_Ellipsis are singletons. */
|
|
if (op == Py_None || op == Py_Ellipsis
|
|
|| PyLong_CheckExact(op)
|
|
|| PyUnicode_CheckExact(op)
|
|
/* code_richcompare() uses _PyCode_ConstantKey() internally */
|
|
|| PyCode_Check(op))
|
|
{
|
|
/* Objects of these types are always different from object of other
|
|
* type and from tuples. */
|
|
key = Py_NewRef(op);
|
|
}
|
|
else if (PyBool_Check(op) || PyBytes_CheckExact(op)) {
|
|
/* Make booleans different from integers 0 and 1.
|
|
* Avoid BytesWarning from comparing bytes with strings. */
|
|
key = PyTuple_Pack(2, Py_TYPE(op), op);
|
|
}
|
|
else if (PyFloat_CheckExact(op)) {
|
|
double d = PyFloat_AS_DOUBLE(op);
|
|
/* all we need is to make the tuple different in either the 0.0
|
|
* or -0.0 case from all others, just to avoid the "coercion".
|
|
*/
|
|
if (d == 0.0 && copysign(1.0, d) < 0.0)
|
|
key = PyTuple_Pack(3, Py_TYPE(op), op, Py_None);
|
|
else
|
|
key = PyTuple_Pack(2, Py_TYPE(op), op);
|
|
}
|
|
else if (PyComplex_CheckExact(op)) {
|
|
Py_complex z;
|
|
int real_negzero, imag_negzero;
|
|
/* For the complex case we must make complex(x, 0.)
|
|
different from complex(x, -0.) and complex(0., y)
|
|
different from complex(-0., y), for any x and y.
|
|
All four complex zeros must be distinguished.*/
|
|
z = PyComplex_AsCComplex(op);
|
|
real_negzero = z.real == 0.0 && copysign(1.0, z.real) < 0.0;
|
|
imag_negzero = z.imag == 0.0 && copysign(1.0, z.imag) < 0.0;
|
|
/* use True, False and None singleton as tags for the real and imag
|
|
* sign, to make tuples different */
|
|
if (real_negzero && imag_negzero) {
|
|
key = PyTuple_Pack(3, Py_TYPE(op), op, Py_True);
|
|
}
|
|
else if (imag_negzero) {
|
|
key = PyTuple_Pack(3, Py_TYPE(op), op, Py_False);
|
|
}
|
|
else if (real_negzero) {
|
|
key = PyTuple_Pack(3, Py_TYPE(op), op, Py_None);
|
|
}
|
|
else {
|
|
key = PyTuple_Pack(2, Py_TYPE(op), op);
|
|
}
|
|
}
|
|
else if (PyTuple_CheckExact(op)) {
|
|
Py_ssize_t i, len;
|
|
PyObject *tuple;
|
|
|
|
len = PyTuple_GET_SIZE(op);
|
|
tuple = PyTuple_New(len);
|
|
if (tuple == NULL)
|
|
return NULL;
|
|
|
|
for (i=0; i < len; i++) {
|
|
PyObject *item, *item_key;
|
|
|
|
item = PyTuple_GET_ITEM(op, i);
|
|
item_key = _PyCode_ConstantKey(item);
|
|
if (item_key == NULL) {
|
|
Py_DECREF(tuple);
|
|
return NULL;
|
|
}
|
|
|
|
PyTuple_SET_ITEM(tuple, i, item_key);
|
|
}
|
|
|
|
key = PyTuple_Pack(2, tuple, op);
|
|
Py_DECREF(tuple);
|
|
}
|
|
else if (PyFrozenSet_CheckExact(op)) {
|
|
Py_ssize_t pos = 0;
|
|
PyObject *item;
|
|
Py_hash_t hash;
|
|
Py_ssize_t i, len;
|
|
PyObject *tuple, *set;
|
|
|
|
len = PySet_GET_SIZE(op);
|
|
tuple = PyTuple_New(len);
|
|
if (tuple == NULL)
|
|
return NULL;
|
|
|
|
i = 0;
|
|
while (_PySet_NextEntry(op, &pos, &item, &hash)) {
|
|
PyObject *item_key;
|
|
|
|
item_key = _PyCode_ConstantKey(item);
|
|
if (item_key == NULL) {
|
|
Py_DECREF(tuple);
|
|
return NULL;
|
|
}
|
|
|
|
assert(i < len);
|
|
PyTuple_SET_ITEM(tuple, i, item_key);
|
|
i++;
|
|
}
|
|
set = PyFrozenSet_New(tuple);
|
|
Py_DECREF(tuple);
|
|
if (set == NULL)
|
|
return NULL;
|
|
|
|
key = PyTuple_Pack(2, set, op);
|
|
Py_DECREF(set);
|
|
return key;
|
|
}
|
|
else {
|
|
/* for other types, use the object identifier as a unique identifier
|
|
* to ensure that they are seen as unequal. */
|
|
PyObject *obj_id = PyLong_FromVoidPtr(op);
|
|
if (obj_id == NULL)
|
|
return NULL;
|
|
|
|
key = PyTuple_Pack(2, obj_id, op);
|
|
Py_DECREF(obj_id);
|
|
}
|
|
return key;
|
|
}
|
|
|
|
void
|
|
_PyStaticCode_Fini(PyCodeObject *co)
|
|
{
|
|
deopt_code(co, _PyCode_CODE(co));
|
|
if (co->co_executors != NULL) {
|
|
clear_executors(co);
|
|
}
|
|
PyMem_Free(co->co_extra);
|
|
if (co->_co_cached != NULL) {
|
|
Py_CLEAR(co->_co_cached->_co_code);
|
|
Py_CLEAR(co->_co_cached->_co_cellvars);
|
|
Py_CLEAR(co->_co_cached->_co_freevars);
|
|
Py_CLEAR(co->_co_cached->_co_varnames);
|
|
PyMem_Free(co->_co_cached);
|
|
co->_co_cached = NULL;
|
|
}
|
|
co->co_extra = NULL;
|
|
if (co->co_weakreflist != NULL) {
|
|
PyObject_ClearWeakRefs((PyObject *)co);
|
|
co->co_weakreflist = NULL;
|
|
}
|
|
free_monitoring_data(co->_co_monitoring);
|
|
co->_co_monitoring = NULL;
|
|
}
|
|
|
|
int
|
|
_PyStaticCode_Init(PyCodeObject *co)
|
|
{
|
|
int res = intern_strings(co->co_names);
|
|
if (res < 0) {
|
|
return -1;
|
|
}
|
|
res = intern_string_constants(co->co_consts, NULL);
|
|
if (res < 0) {
|
|
return -1;
|
|
}
|
|
res = intern_strings(co->co_localsplusnames);
|
|
if (res < 0) {
|
|
return -1;
|
|
}
|
|
_PyCode_Quicken(co);
|
|
return 0;
|
|
}
|
|
|
|
#define MAX_CODE_UNITS_PER_LOC_ENTRY 8
|