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GH-97779: Ensure that *all* frame objects are backed by "complete" frames (GH-97845)

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Brandt Bucher 2022-10-04 17:30:03 -07:00 • committed by GitHub
parent c3648f4e4a
commit 0ff8fd6583
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5 changed files with 75 additions and 4 deletions
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22
Objects/codeobject.c
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@ -638,12 +638,22 @@ PyCode_New(int argcount, int kwonlyargcount,
exceptiontable);
}
static const char assert0[6] = {
// 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)
{
@ -651,6 +661,7 @@ PyCode_NewEmpty(const char *filename, const char *funcname, int firstlineno)
PyObject *filename_ob = NULL;
PyObject *funcname_ob = NULL;
PyObject *code_ob = NULL;
PyObject *linetable_ob = NULL;
PyCodeObject *result = NULL;
nulltuple = PyTuple_New(0);
@ -665,10 +676,14 @@ PyCode_NewEmpty(const char *filename, const char *funcname, int firstlineno)
if (filename_ob == NULL) {
goto failed;
}
code_ob = PyBytes_FromStringAndSize(assert0, 6);
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 = {
@ -677,7 +692,7 @@ PyCode_NewEmpty(const char *filename, const char *funcname, int firstlineno)
.qualname = funcname_ob,
.code = code_ob,
.firstlineno = firstlineno,
.linetable = emptystring,
.linetable = linetable_ob,
.consts = nulltuple,
.names = nulltuple,
.localsplusnames = nulltuple,
@ -692,6 +707,7 @@ failed:
Py_XDECREF(funcname_ob);
Py_XDECREF(filename_ob);
Py_XDECREF(code_ob);
Py_XDECREF(linetable_ob);
return result;
}