Christian Tismer's "trashcan" patch:
Added wrapping macros to dictobject.c, listobject.c, tupleobject.c,
frameobject.c, traceback.c that safely prevends core dumps
on stack overflow. Macros and functions in object.c, object.h.
The method is an "elevator destructor" that turns cascading
deletes into tail recursive behavior when some limit is hit.
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index 568c4b3..5112468 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -172,6 +172,7 @@
{
register int i;
+ Py_TRASHCAN_SAFE_BEGIN(op)
if (op->ob_size > 0) {
i = op->ob_size;
while (--i >= 0)
@@ -180,11 +181,13 @@
if (op->ob_size < MAXSAVESIZE) {
op->ob_item[0] = (PyObject *) free_tuples[op->ob_size];
free_tuples[op->ob_size] = op;
- return;
+ goto done; /* return */
}
#endif
}
free((ANY *)op);
+done:
+ Py_TRASHCAN_SAFE_END(op)
}
static int