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bpo-31675: Fix memory leaks in Tkinter's methods splitlist() and split() (#3866) 

when pass a string larger than 2 GiB.

Decrease memory requirements for Tcl's bigmem tests.
This commit is contained in:
Serhiy Storchaka 2017-10-03 22:39:55 +03:00 committed by GitHub
parent 929b40a601
commit 27c623c845
3 changed files with 45 additions and 23 deletions
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54
Lib/test/test_tcl.py
View File

@ -662,32 +662,44 @@ class BigmemTclTest(unittest.TestCase):
@support.bigmemtest(size=INT_MAX + 1, memuse=5, dry_run=False)
def test_huge_string_call(self, size):
value = ' ' * size
self.assertRaises(OverflowError, self.interp.call, 'set', '_', value)
self.assertRaises(OverflowError, self.interp.call, 'string', 'index', value, 0)
@support.cpython_only
@unittest.skipUnless(INT_MAX < PY_SSIZE_T_MAX, "needs UINT_MAX < SIZE_MAX")
@support.bigmemtest(size=INT_MAX + 1, memuse=9, dry_run=False)
@support.bigmemtest(size=INT_MAX + 1, memuse=2, dry_run=False)
def test_huge_string_builtins(self, size):
tk = self.interp.tk
value = '1' + ' ' * size
self.assertRaises(OverflowError, self.interp.tk.getint, value)
self.assertRaises(OverflowError, self.interp.tk.getdouble, value)
self.assertRaises(OverflowError, self.interp.tk.getboolean, value)
self.assertRaises(OverflowError, self.interp.eval, value)
self.assertRaises(OverflowError, self.interp.evalfile, value)
self.assertRaises(OverflowError, self.interp.record, value)
self.assertRaises(OverflowError, self.interp.adderrorinfo, value)
self.assertRaises(OverflowError, self.interp.setvar, value, 'x', 'a')
self.assertRaises(OverflowError, self.interp.setvar, 'x', value, 'a')
self.assertRaises(OverflowError, self.interp.unsetvar, value)
self.assertRaises(OverflowError, self.interp.unsetvar, 'x', value)
self.assertRaises(OverflowError, self.interp.adderrorinfo, value)
self.assertRaises(OverflowError, self.interp.exprstring, value)
self.assertRaises(OverflowError, self.interp.exprlong, value)
self.assertRaises(OverflowError, self.interp.exprboolean, value)
self.assertRaises(OverflowError, self.interp.splitlist, value)
self.assertRaises(OverflowError, self.interp.split, value)
self.assertRaises(OverflowError, self.interp.createcommand, value, max)
self.assertRaises(OverflowError, self.interp.deletecommand, value)
self.assertRaises(OverflowError, tk.getint, value)
self.assertRaises(OverflowError, tk.getdouble, value)
self.assertRaises(OverflowError, tk.getboolean, value)
self.assertRaises(OverflowError, tk.eval, value)
self.assertRaises(OverflowError, tk.evalfile, value)
self.assertRaises(OverflowError, tk.record, value)
self.assertRaises(OverflowError, tk.adderrorinfo, value)
self.assertRaises(OverflowError, tk.setvar, value, 'x', 'a')
self.assertRaises(OverflowError, tk.setvar, 'x', value, 'a')
self.assertRaises(OverflowError, tk.unsetvar, value)
self.assertRaises(OverflowError, tk.unsetvar, 'x', value)
self.assertRaises(OverflowError, tk.adderrorinfo, value)
self.assertRaises(OverflowError, tk.exprstring, value)
self.assertRaises(OverflowError, tk.exprlong, value)
self.assertRaises(OverflowError, tk.exprboolean, value)
self.assertRaises(OverflowError, tk.splitlist, value)
self.assertRaises(OverflowError, tk.split, value)
self.assertRaises(OverflowError, tk.createcommand, value, max)
self.assertRaises(OverflowError, tk.deletecommand, value)
@support.cpython_only
@unittest.skipUnless(INT_MAX < PY_SSIZE_T_MAX, "needs UINT_MAX < SIZE_MAX")
@support.bigmemtest(size=INT_MAX + 1, memuse=6, dry_run=False)
def test_huge_string_builtins2(self, size):
# These commands require larger memory for possible error messages
tk = self.interp.tk
value = '1' + ' ' * size
self.assertRaises(OverflowError, tk.evalfile, value)
self.assertRaises(OverflowError, tk.unsetvar, value)
self.assertRaises(OverflowError, tk.unsetvar, 'x', value)
def setUpModule():

2
Misc/NEWS.d/next/Library/2017-10-03-15-06-24.bpo-31675.Nh7jJ3.rst Normal file
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@ -0,0 +1,2 @@
Fixed memory leaks in Tkinter's methods splitlist() and split() when pass a
string larger than 2 GiB.

12
Modules/_tkinter.c
View File

@ -2257,7 +2257,11 @@ _tkinter_tkapp_splitlist(TkappObject *self, PyObject *arg)
if (!PyArg_Parse(arg, "et:splitlist", "utf-8", &list))
return NULL;
CHECK_STRING_LENGTH(list);
if (strlen(list) >= INT_MAX) {
PyErr_SetString(PyExc_OverflowError, "string is too long");
PyMem_Free(list);
return NULL;
}
if (Tcl_SplitList(Tkapp_Interp(self), list,
&argc, &argv) == TCL_ERROR) {
PyMem_Free(list);
@ -2328,7 +2332,11 @@ _tkinter_tkapp_split(TkappObject *self, PyObject *arg)
if (!PyArg_Parse(arg, "et:split", "utf-8", &list))
return NULL;
CHECK_STRING_LENGTH(list);
if (strlen(list) >= INT_MAX) {
PyErr_SetString(PyExc_OverflowError, "string is too long");
PyMem_Free(list);
return NULL;
}
v = Split(list);
PyMem_Free(list);
return v;