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Issue #19437: Fix _threading.RLock constructor (rlock_new), call 

Py_DECREF(self) if PyThread_allocate_lock() failed instead of calling directly
type->tp_free(self), to keep the chained list of objects consistent when Python
is compiled in debug mode

fails, don't consume the row (restore it) and fail immediatly (don't call
pysqlite_step())
This commit is contained in:
Victor Stinner 2013-11-05 15:10:19 +01:00
parent 85a12a8beb
commit 357f5155dc
1 changed files with 16 additions and 12 deletions
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28
Modules/_threadmodule.c
View File

@ -68,7 +68,7 @@ acquire_timed(PyThread_type_lock lock, PY_TIMEOUT_T microseconds)
Py_BEGIN_ALLOW_THREADS
r = PyThread_acquire_lock_timed(lock, microseconds, 1);
Py_END_ALLOW_THREADS
}
}
if (r == PY_LOCK_INTR) {
/* Run signal handlers if we were interrupted. Propagate
@ -255,14 +255,17 @@ typedef struct {
static void
rlock_dealloc(rlockobject *self)
{
assert(self->rlock_lock);
if (self->in_weakreflist != NULL)
PyObject_ClearWeakRefs((PyObject *) self);
/* Unlock the lock so it's safe to free it */
if (self->rlock_count > 0)
PyThread_release_lock(self->rlock_lock);
/* self->rlock_lock can be NULL if PyThread_allocate_lock() failed
in rlock_new() */
if (self->rlock_lock != NULL) {
/* Unlock the lock so it's safe to free it */
if (self->rlock_count > 0)
PyThread_release_lock(self->rlock_lock);
PyThread_free_lock(self->rlock_lock);
PyThread_free_lock(self->rlock_lock);
}
Py_TYPE(self)->tp_free(self);
}
@ -452,15 +455,16 @@ rlock_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
self = (rlockobject *) type->tp_alloc(type, 0);
if (self != NULL) {
self->rlock_lock = PyThread_allocate_lock();
if (self->rlock_lock == NULL) {
type->tp_free(self);
PyErr_SetString(ThreadError, "can't allocate lock");
return NULL;
}
self->in_weakreflist = NULL;
self->rlock_owner = 0;
self->rlock_count = 0;
self->rlock_lock = PyThread_allocate_lock();
if (self->rlock_lock == NULL) {
Py_DECREF(self);
PyErr_SetString(ThreadError, "can't allocate lock");
return NULL;
}
}
return (PyObject *) self;