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Marshal clean-up (SF patch #873224)

This commit is contained in:
Armin Rigo 2004-03-26 15:09:27 +00:00
parent 01c9f8c35f
commit 01ab279056
3 changed files with 66 additions and 70 deletions
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5
Lib/test/test_marshal.py
View File

@ -175,6 +175,11 @@ class BugsTestCase(unittest.TestCase):
# Simple-minded check for SF 588452: Debug build crashes
marshal.dumps([128] * 1000)
def test_patch_873224(self):
self.assertRaises(Exception, marshal.loads, '0')
self.assertRaises(Exception, marshal.loads, 'f')
self.assertRaises(Exception, marshal.loads, marshal.dumps(5L)[:-1])
def test_main():
test_support.run_unittest(IntTestCase,
FloatTestCase,

10
Python/import.c
View File

@ -706,12 +706,12 @@ read_compiled_module(char *cpathname, FILE *fp)
PyObject *co;
co = PyMarshal_ReadLastObjectFromFile(fp);
/* Ugly: rd_object() may return NULL with or without error */
if (co == NULL || !PyCode_Check(co)) {
if (!PyErr_Occurred())
if (co == NULL)
return NULL;
if (!PyCode_Check(co)) {
PyErr_Format(PyExc_ImportError,
"Non-code object in %.200s", cpathname);
Py_XDECREF(co);
Py_DECREF(co);
return NULL;
}
return (PyCodeObject *)co;
@ -819,7 +819,7 @@ write_compiled_module(PyCodeObject *co, char *cpathname, long mtime)
/* First write a 0 for mtime */
PyMarshal_WriteLongToFile(0L, fp);
PyMarshal_WriteObjectToFile((PyObject *)co, fp);
if (ferror(fp)) {
if (fflush(fp) != 0 || ferror(fp)) {
if (Py_VerboseFlag)
PySys_WriteStderr("# can't write %s\n", cpathname);
/* Don't keep partial file */

117
Python/marshal.c
View File

@ -380,6 +380,8 @@ r_long64(RFILE *p)
static PyObject *
r_object(RFILE *p)
{
/* NULL is a valid return value, it does not necessarily means that
an exception is set. */
PyObject *v, *v2;
long i, n;
int type = r_byte(p);
@ -430,8 +432,16 @@ r_object(RFILE *p)
if (ob == NULL)
return NULL;
ob->ob_size = n;
for (i = 0; i < size; i++)
ob->ob_digit[i] = r_short(p);
for (i = 0; i < size; i++) {
int digit = r_short(p);
if (digit < 0) {
Py_DECREF(ob);
PyErr_SetString(PyExc_ValueError,
"bad marshal data");
return NULL;
}
ob->ob_digit[i] = digit;
}
return (PyObject *)ob;
}
@ -440,7 +450,7 @@ r_object(RFILE *p)
char buf[256];
double dx;
n = r_byte(p);
if (r_string(buf, (int)n, p) != n) {
if (n == EOF || r_string(buf, (int)n, p) != n) {
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
return NULL;
@ -458,7 +468,7 @@ r_object(RFILE *p)
char buf[256];
Py_complex c;
n = r_byte(p);
if (r_string(buf, (int)n, p) != n) {
if (n == EOF || r_string(buf, (int)n, p) != n) {
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
return NULL;
@ -468,7 +478,7 @@ r_object(RFILE *p)
c.real = atof(buf);
PyFPE_END_PROTECT(c)
n = r_byte(p);
if (r_string(buf, (int)n, p) != n) {
if (n == EOF || r_string(buf, (int)n, p) != n) {
PyErr_SetString(PyExc_EOFError,
"EOF read where object expected");
return NULL;
@ -535,6 +545,9 @@ r_object(RFILE *p)
for (i = 0; i < n; i++) {
v2 = r_object(p);
if ( v2 == NULL ) {
if (!PyErr_Occurred())
PyErr_SetString(PyExc_TypeError,
"NULL object in marshal data");
Py_DECREF(v);
v = NULL;
break;
@ -555,6 +568,9 @@ r_object(RFILE *p)
for (i = 0; i < n; i++) {
v2 = r_object(p);
if ( v2 == NULL ) {
if (!PyErr_Occurred())
PyErr_SetString(PyExc_TypeError,
"NULL object in marshal data");
Py_DECREF(v);
v = NULL;
break;
@ -571,13 +587,17 @@ r_object(RFILE *p)
PyObject *key, *val;
key = r_object(p);
if (key == NULL)
break; /* XXX Assume TYPE_NULL, not an error */
break;
val = r_object(p);
if (val != NULL)
PyDict_SetItem(v, key, val);
Py_DECREF(key);
Py_XDECREF(val);
}
if (PyErr_Occurred()) {
Py_DECREF(v);
v = NULL;
}
return v;
case TYPE_CODE:
@ -592,29 +612,16 @@ r_object(RFILE *p)
int nlocals = r_long(p);
int stacksize = r_long(p);
int flags = r_long(p);
PyObject *code = NULL;
PyObject *consts = NULL;
PyObject *names = NULL;
PyObject *varnames = NULL;
PyObject *freevars = NULL;
PyObject *cellvars = NULL;
PyObject *filename = NULL;
PyObject *name = NULL;
int firstlineno = 0;
PyObject *lnotab = NULL;
code = r_object(p);
if (code) consts = r_object(p);
if (consts) names = r_object(p);
if (names) varnames = r_object(p);
if (varnames) freevars = r_object(p);
if (freevars) cellvars = r_object(p);
if (cellvars) filename = r_object(p);
if (filename) name = r_object(p);
if (name) {
firstlineno = r_long(p);
lnotab = r_object(p);
}
PyObject *code = r_object(p);
PyObject *consts = r_object(p);
PyObject *names = r_object(p);
PyObject *varnames = r_object(p);
PyObject *freevars = r_object(p);
PyObject *cellvars = r_object(p);
PyObject *filename = r_object(p);
PyObject *name = r_object(p);
int firstlineno = r_long(p);
PyObject *lnotab = r_object(p);
if (!PyErr_Occurred()) {
v = (PyObject *) PyCode_New(
@ -647,6 +654,20 @@ r_object(RFILE *p)
}
}
PyObject *
read_object(RFILE *p)
{
PyObject *v;
if (PyErr_Occurred()) {
fprintf(stderr, "XXX readobject called with exception set\n");
return NULL;
}
v = r_object(p);
if (v == NULL && !PyErr_Occurred())
PyErr_SetString(PyExc_TypeError, "NULL object in marshal data");
return v;
}
int
PyMarshal_ReadShortFromFile(FILE *fp)
{
@ -693,10 +714,6 @@ PyMarshal_ReadLastObjectFromFile(FILE *fp)
#ifdef HAVE_FSTAT
off_t filesize;
#endif
if (PyErr_Occurred()) {
fprintf(stderr, "XXX rd_object called with exception set\n");
return NULL;
}
#ifdef HAVE_FSTAT
filesize = getfilesize(fp);
if (filesize > 0) {
@ -730,27 +747,18 @@ PyObject *
PyMarshal_ReadObjectFromFile(FILE *fp)
{
RFILE rf;
if (PyErr_Occurred()) {
fprintf(stderr, "XXX rd_object called with exception set\n");
return NULL;
}
rf.fp = fp;
return r_object(&rf);
return read_object(&rf);
}
PyObject *
PyMarshal_ReadObjectFromString(char *str, int len)
{
RFILE rf;
if (PyErr_Occurred()) {
fprintf(stderr, "XXX rds_object called with exception set\n");
return NULL;
}
rf.fp = NULL;
rf.str = NULL;
rf.ptr = str;
rf.end = str + len;
return r_object(&rf);
return read_object(&rf);
}
PyObject *
@ -816,7 +824,6 @@ marshal_load(PyObject *self, PyObject *args)
{
RFILE rf;
PyObject *f;
PyObject *v;
if (!PyArg_ParseTuple(args, "O:load", &f))
return NULL;
if (!PyFile_Check(f)) {
@ -825,15 +832,7 @@ marshal_load(PyObject *self, PyObject *args)
return NULL;
}
rf.fp = PyFile_AsFile(f);
rf.str = NULL;
rf.ptr = rf.end = NULL;
PyErr_Clear();
v = r_object(&rf);
if (PyErr_Occurred()) {
Py_XDECREF(v);
v = NULL;
}
return v;
return read_object(&rf);
}
static PyObject *
@ -849,22 +848,14 @@ static PyObject *
marshal_loads(PyObject *self, PyObject *args)
{
RFILE rf;
PyObject *v;
char *s;
int n;
if (!PyArg_ParseTuple(args, "s#:loads", &s, &n))
return NULL;
rf.fp = NULL;
rf.str = args;
rf.ptr = s;
rf.end = s + n;
PyErr_Clear();
v = r_object(&rf);
if (PyErr_Occurred()) {
Py_XDECREF(v);
v = NULL;
}
return v;
return read_object(&rf);
}
static PyMethodDef marshal_methods[] = {