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Commit 2f5e79ed authored by Jeremy Hylton's avatar Jeremy Hylton
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Remove MUCH_RING_CHECKING option, which was disabled. 

As the comment said:

    Not really necessary in production code... disable this before
    release, providing noone has been reporting and RuntimeErrors
    that it uses to report problems.
parent d59317da
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Showing with 8 additions and 681 deletions
src/Persistence/cPickleCache.c
View file @ 2f5e79ed
......@@ -88,7 +88,7 @@ process must skip such objects, rather than deactivating them.
static char cPickleCache_doc_string[] =
"Defines the PickleCache used by ZODB Connection objects.\n"
"\n"
"$Id: cPickleCache.c,v 1.68 2002/06/11 02:34:22 jeremy Exp $\n";
"$Id: cPickleCache.c,v 1.69 2002/10/23 19:18:35 jeremy Exp $\n";
#define ASSIGN(V,E) {PyObject *__e; __e=(E); Py_XDECREF(V); (V)=__e;}
#define UNLESS(E) if(!(E))
......@@ -159,73 +159,9 @@ object_from_oid(ccobject *self, PyObject *key)
return v;
}
/* define this for extra debugging checks, and lousy performance.
Not really necessary in production code... disable this before
release, providing noone has been reporting and RuntimeErrors
that it uses to report problems.
*/
/* #define MUCH_RING_CHECKING */
#ifdef MUCH_RING_CHECKING
static int present_in_ring(ccobject *self, CPersistentRing *target);
static int ring_corrupt(ccobject *self, const char *context);
#define IS_RING_CORRUPT(OBJ, CTX) ring_corrupt((OBJ), (CTX))
#define OBJECT_FROM_RING(SELF, HERE, CTX) \
object_from_ring((SELF), (HERE), (CTX))
static cPersistentObject *
object_from_ring(ccobject *self, CPersistentRing *here, const char *context)
{
/* Given a position in the LRU ring, return a borrowed
reference to the object at that point in the ring. The caller is
responsible for ensuring that this ring position really does
correspond to a persistent object, although the debugging
version will double-check this. */
PyObject *object;
/* given a pointer to a ring slot in a cPersistent_HEAD, we want to get
* the pointer to the Python object that slot is embedded in.
*/
object = (PyObject *)(((char *)here) - offsetof(cPersistentObject, ring));
if (!PyExtensionInstance_Check(object)) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered non-ExtensionClass object in %s",
context);
return NULL;
}
if (!(((PyExtensionClass*)(object->ob_type))->class_flags & PERSISTENT_TYPE_FLAG)) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered non-persistent object in %s", context);
return NULL;
}
if (((cPersistentObject*)object)->jar != self->jar) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered object from a different jar in %s",
context);
return NULL;
}
if (((cPersistentObject *)object)->cache != (PerCache *)self) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered broken ring in %s", context);
return NULL;
}
return (cPersistentObject *)object;
}
#else /* MUCH_RING_CHECKING */
#define IS_RING_CORRUPT(OBJ, CTX) 0
#define OBJECT_FROM_RING(SELF, HERE, CTX) \
((cPersistentObject *)(((char *)here) - offsetof(cPersistentObject, ring)))
#endif
static int
scan_gc_items(ccobject *self,int target)
{
......@@ -238,44 +174,11 @@ scan_gc_items(ccobject *self,int target)
CPersistentRing placeholder;
CPersistentRing *here = self->ring_home.next;
#ifdef MUCH_RING_CHECKING
int safety_counter = self->cache_size * 10;
if (safety_counter < 10000)
safety_counter = 10000;
#endif
/* Scan through the ring until we either find the ring_home (i.e. start
* of the ring, or we've ghosted enough objects to reach the target
* size.
*/
while (1) {
if (IS_RING_CORRUPT(self, "mid-gc"))
return -1;
#ifdef MUCH_RING_CHECKING
if (!safety_counter--) {
/* This loop has been running for a very long time. It is
possible that someone loaded a very large number of objects,
and now wants us to blow them all away. However it may also
indicate a logic error. If the loop has been running this
long then you really have to doubt it will ever terminate.
In the MUCH_RING_CHECKING build we prefer to raise an
exception here
*/
PyErr_SetString(PyExc_RuntimeError,
"scan_gc_items safety counter exceeded");
return -1;
}
if (!present_in_ring(self, here)) {
/* Our current working position is no longer in the ring.
That's bad. */
PyErr_SetString(PyExc_RuntimeError,
"working position fell out the ring, in scan_gc_items");
return -1;
}
#endif
/* back to the home position. stop looking */
if (here == &self->ring_home)
return 0;
......@@ -345,8 +248,6 @@ lockgc(ccobject *self, int target_size)
return Py_None;
}
if (IS_RING_CORRUPT(self, "pre-gc"))
return NULL;
ENGINE_NOISE("<");
self->ring_lock = 1;
if (scan_gc_items(self, target_size)) {
......@@ -355,8 +256,6 @@ lockgc(ccobject *self, int target_size)
}
self->ring_lock = 0;
ENGINE_NOISE(">\n");
if (IS_RING_CORRUPT(self, "post-gc"))
return NULL;
Py_INCREF(Py_None);
return Py_None;
......@@ -549,9 +448,6 @@ cc_lru_items(ccobject *self, PyObject *args)
return NULL;
}
if (IS_RING_CORRUPT(self, "pre-cc_items"))
return NULL;
l = PyList_New(0);
if (l == NULL)
return NULL;
......@@ -701,9 +597,6 @@ cc_getattr(ccobject *self, char *name)
{
PyObject *r;
if (IS_RING_CORRUPT(self, "getattr"))
return NULL;
if(*name=='c')
{
if(strcmp(name,"cache_age")==0)
......@@ -776,9 +669,6 @@ cc_subscript(ccobject *self, PyObject *key)
{
PyObject *r;
if (IS_RING_CORRUPT(self, "__getitem__"))
return NULL;
r = (PyObject *)object_from_oid(self, key);
if (r == NULL) {
PyErr_SetObject(PyExc_KeyError, key);
......@@ -884,8 +774,6 @@ cc_add_item(ccobject *self, PyObject *key, PyObject *v)
*/
}
if (IS_RING_CORRUPT(self, "pre-setitem"))
return -1;
if (PyDict_SetItem(self->data, key, v) < 0)
return -1;
......@@ -906,10 +794,7 @@ cc_add_item(ccobject *self, PyObject *key, PyObject *v)
Py_DECREF(v);
}
if (IS_RING_CORRUPT(self, "post-setitem"))
return -1;
else
return 0;
return 0;
}
static int
......@@ -919,9 +804,6 @@ cc_del_item(ccobject *self, PyObject *key)
cPersistentObject *p;
/* unlink this item from the ring */
if (IS_RING_CORRUPT(self, "pre-delitem"))
return -1;
v = (PyObject *)object_from_oid(self, key);
if (v == NULL)
return -1;
......@@ -957,9 +839,6 @@ cc_del_item(ccobject *self, PyObject *key)
return -1;
}
if (IS_RING_CORRUPT(self, "post-delitem"))
return -1;
return 0;
}
......@@ -978,101 +857,6 @@ cc_ass_sub(ccobject *self, PyObject *key, PyObject *v)
return cc_del_item(self, key);
}
#ifdef MUCH_RING_CHECKING
static int
_ring_corrupt(ccobject *self, const char *context)
{
CPersistentRing *here = &(self->ring_home);
/* Determine the number of objects we expect to see in the ring.
* Normally this is one for the home node plus one for each
* non-ghost object, for which we maintain a separate total. If the
* ring is unlocked then this value should be precise; there should
* be no foreign nodes in the ring. If locked, it may be an
* underestimate */
int expected = 1 + self->non_ghost_count;
int total = 0;
do {
if (++total > (expected + 10))
/* ring too big, by a large margin. This probably
* means we are stomping through random memory. Abort
* now, and maybe we can deliver this error message
* before dumping core */
return 3;
if (!here->next)
return 4; /* various linking problems */
if (!here->prev)
return 5;
if (!here->next->prev)
return 7;
if (!here->prev->next)
return 8;
if (here->prev->next != here)
return 9;
if (here->next->prev != here)
return 10;
if (!self->ring_lock) {
/* If the ring is unlocked, then it must not contain
* objects other than persistent instances (and the home) */
if (here != &self->ring_home) {
cPersistentObject *object = OBJECT_FROM_RING(self, here,
context);
if (!object)
return 12;
if (object->state == cPersistent_GHOST_STATE)
/* ghost objects should not be in the ring, according
* to the ghost storage regime. Experience shows
* that this error condition is likely to be caused
* by a race condition bug somewhere */
return 13;
}
}
here = here->next;
} while (here != &self->ring_home);
if (self->ring_lock) {
if (total < expected)
/* ring is too small.
too big is ok when locked, we have already checked it is
not too big */
return 6;
} else {
if (total != expected)
return 14; /* ring size wrong, or bad ghost accounting */
}
return 0;
}
static int
ring_corrupt(ccobject *self, const char *context)
{
int code = _ring_corrupt(self, context);
if (code) {
if (!PyErr_Occurred())
PyErr_Format(PyExc_RuntimeError,
"broken ring (code %d) in %s, size %d",
code, context, PyDict_Size(self->data));
return code;
}
return 0;
}
static int
present_in_ring(ccobject *self,CPersistentRing *target)
{
CPersistentRing *here = self->ring_home.next;
while (1) {
if (here == target)
return 1;
if (here == &self->ring_home)
return 0; /* back to the home position, and we didnt find it */
here = here->next;
}
}
#endif /* MUCH_RING_CHECKING */
static PyMappingMethods cc_as_mapping = {
(inquiry)cc_length, /*mp_length*/
(binaryfunc)cc_subscript, /*mp_subscript*/
......@@ -1174,10 +958,4 @@ initcPickleCache(void)
d = PyModule_GetDict(m);
PyDict_SetItemString(d, "cache_variant", PyString_FromString("stiff/c"));
#ifdef MUCH_RING_CHECKING
PyDict_SetItemString(d, "MUCH_RING_CHECKING", PyInt_FromLong(1));
#else
PyDict_SetItemString(d, "MUCH_RING_CHECKING", PyInt_FromLong(0));
#endif
}
src/ZODB/Connection.py
View file @ 2f5e79ed
......@@ -13,9 +13,9 @@
##############################################################################
"""Database connection support
$Id: Connection.py,v 1.77 2002/10/04 20:44:25 jeremy Exp $"""
$Id: Connection.py,v 1.78 2002/10/23 19:18:35 jeremy Exp $"""
from cPickleCache import PickleCache, MUCH_RING_CHECKING
from cPickleCache import PickleCache
from POSException import ConflictError, ReadConflictError
from ExtensionClass import Base
import ExportImport, TmpStore
......@@ -31,13 +31,6 @@ from types import StringType, ClassType
global_code_timestamp = 0
if MUCH_RING_CHECKING:
# To get rid of this warning, change the define inside
# cPickleCache.c and recompile.
LOG('ZODB',WARNING,
'Using cPickleCache with low performance (but extra debugging checks)')
del MUCH_RING_CHECKING
def updateCodeTimestamp():
'''
Called after changes are made to persistence-based classes.
......
src/ZODB/cPickleCache.c
View file @ 2f5e79ed
......@@ -88,7 +88,7 @@ process must skip such objects, rather than deactivating them.
static char cPickleCache_doc_string[] =
"Defines the PickleCache used by ZODB Connection objects.\n"
"\n"
"$Id: cPickleCache.c,v 1.68 2002/06/11 02:34:22 jeremy Exp $\n";
"$Id: cPickleCache.c,v 1.69 2002/10/23 19:18:35 jeremy Exp $\n";
#define ASSIGN(V,E) {PyObject *__e; __e=(E); Py_XDECREF(V); (V)=__e;}
#define UNLESS(E) if(!(E))
......@@ -159,73 +159,9 @@ object_from_oid(ccobject *self, PyObject *key)
return v;
}
/* define this for extra debugging checks, and lousy performance.
Not really necessary in production code... disable this before
release, providing noone has been reporting and RuntimeErrors
that it uses to report problems.
*/
/* #define MUCH_RING_CHECKING */
#ifdef MUCH_RING_CHECKING
static int present_in_ring(ccobject *self, CPersistentRing *target);
static int ring_corrupt(ccobject *self, const char *context);
#define IS_RING_CORRUPT(OBJ, CTX) ring_corrupt((OBJ), (CTX))
#define OBJECT_FROM_RING(SELF, HERE, CTX) \
object_from_ring((SELF), (HERE), (CTX))
static cPersistentObject *
object_from_ring(ccobject *self, CPersistentRing *here, const char *context)
{
/* Given a position in the LRU ring, return a borrowed
reference to the object at that point in the ring. The caller is
responsible for ensuring that this ring position really does
correspond to a persistent object, although the debugging
version will double-check this. */
PyObject *object;
/* given a pointer to a ring slot in a cPersistent_HEAD, we want to get
* the pointer to the Python object that slot is embedded in.
*/
object = (PyObject *)(((char *)here) - offsetof(cPersistentObject, ring));
if (!PyExtensionInstance_Check(object)) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered non-ExtensionClass object in %s",
context);
return NULL;
}
if (!(((PyExtensionClass*)(object->ob_type))->class_flags & PERSISTENT_TYPE_FLAG)) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered non-persistent object in %s", context);
return NULL;
}
if (((cPersistentObject*)object)->jar != self->jar) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered object from a different jar in %s",
context);
return NULL;
}
if (((cPersistentObject *)object)->cache != (PerCache *)self) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered broken ring in %s", context);
return NULL;
}
return (cPersistentObject *)object;
}
#else /* MUCH_RING_CHECKING */
#define IS_RING_CORRUPT(OBJ, CTX) 0
#define OBJECT_FROM_RING(SELF, HERE, CTX) \
((cPersistentObject *)(((char *)here) - offsetof(cPersistentObject, ring)))
#endif
static int
scan_gc_items(ccobject *self,int target)
{
......@@ -238,44 +174,11 @@ scan_gc_items(ccobject *self,int target)
CPersistentRing placeholder;
CPersistentRing *here = self->ring_home.next;
#ifdef MUCH_RING_CHECKING
int safety_counter = self->cache_size * 10;
if (safety_counter < 10000)
safety_counter = 10000;
#endif
/* Scan through the ring until we either find the ring_home (i.e. start
* of the ring, or we've ghosted enough objects to reach the target
* size.
*/
while (1) {
if (IS_RING_CORRUPT(self, "mid-gc"))
return -1;
#ifdef MUCH_RING_CHECKING
if (!safety_counter--) {
/* This loop has been running for a very long time. It is
possible that someone loaded a very large number of objects,
and now wants us to blow them all away. However it may also
indicate a logic error. If the loop has been running this
long then you really have to doubt it will ever terminate.
In the MUCH_RING_CHECKING build we prefer to raise an
exception here
*/
PyErr_SetString(PyExc_RuntimeError,
"scan_gc_items safety counter exceeded");
return -1;
}
if (!present_in_ring(self, here)) {
/* Our current working position is no longer in the ring.
That's bad. */
PyErr_SetString(PyExc_RuntimeError,
"working position fell out the ring, in scan_gc_items");
return -1;
}
#endif
/* back to the home position. stop looking */
if (here == &self->ring_home)
return 0;
......@@ -345,8 +248,6 @@ lockgc(ccobject *self, int target_size)
return Py_None;
}
if (IS_RING_CORRUPT(self, "pre-gc"))
return NULL;
ENGINE_NOISE("<");
self->ring_lock = 1;
if (scan_gc_items(self, target_size)) {
......@@ -355,8 +256,6 @@ lockgc(ccobject *self, int target_size)
}
self->ring_lock = 0;
ENGINE_NOISE(">\n");
if (IS_RING_CORRUPT(self, "post-gc"))
return NULL;
Py_INCREF(Py_None);
return Py_None;
......@@ -549,9 +448,6 @@ cc_lru_items(ccobject *self, PyObject *args)
return NULL;
}
if (IS_RING_CORRUPT(self, "pre-cc_items"))
return NULL;
l = PyList_New(0);
if (l == NULL)
return NULL;
......@@ -701,9 +597,6 @@ cc_getattr(ccobject *self, char *name)
{
PyObject *r;
if (IS_RING_CORRUPT(self, "getattr"))
return NULL;
if(*name=='c')
{
if(strcmp(name,"cache_age")==0)
......@@ -776,9 +669,6 @@ cc_subscript(ccobject *self, PyObject *key)
{
PyObject *r;
if (IS_RING_CORRUPT(self, "__getitem__"))
return NULL;
r = (PyObject *)object_from_oid(self, key);
if (r == NULL) {
PyErr_SetObject(PyExc_KeyError, key);
......@@ -884,8 +774,6 @@ cc_add_item(ccobject *self, PyObject *key, PyObject *v)
*/
}
if (IS_RING_CORRUPT(self, "pre-setitem"))
return -1;
if (PyDict_SetItem(self->data, key, v) < 0)
return -1;
......@@ -906,10 +794,7 @@ cc_add_item(ccobject *self, PyObject *key, PyObject *v)
Py_DECREF(v);
}
if (IS_RING_CORRUPT(self, "post-setitem"))
return -1;
else
return 0;
return 0;
}
static int
......@@ -919,9 +804,6 @@ cc_del_item(ccobject *self, PyObject *key)
cPersistentObject *p;
/* unlink this item from the ring */
if (IS_RING_CORRUPT(self, "pre-delitem"))
return -1;
v = (PyObject *)object_from_oid(self, key);
if (v == NULL)
return -1;
......@@ -957,9 +839,6 @@ cc_del_item(ccobject *self, PyObject *key)
return -1;
}
if (IS_RING_CORRUPT(self, "post-delitem"))
return -1;
return 0;
}
......@@ -978,101 +857,6 @@ cc_ass_sub(ccobject *self, PyObject *key, PyObject *v)
return cc_del_item(self, key);
}
#ifdef MUCH_RING_CHECKING
static int
_ring_corrupt(ccobject *self, const char *context)
{
CPersistentRing *here = &(self->ring_home);
/* Determine the number of objects we expect to see in the ring.
* Normally this is one for the home node plus one for each
* non-ghost object, for which we maintain a separate total. If the
* ring is unlocked then this value should be precise; there should
* be no foreign nodes in the ring. If locked, it may be an
* underestimate */
int expected = 1 + self->non_ghost_count;
int total = 0;
do {
if (++total > (expected + 10))
/* ring too big, by a large margin. This probably
* means we are stomping through random memory. Abort
* now, and maybe we can deliver this error message
* before dumping core */
return 3;
if (!here->next)
return 4; /* various linking problems */
if (!here->prev)
return 5;
if (!here->next->prev)
return 7;
if (!here->prev->next)
return 8;
if (here->prev->next != here)
return 9;
if (here->next->prev != here)
return 10;
if (!self->ring_lock) {
/* If the ring is unlocked, then it must not contain
* objects other than persistent instances (and the home) */
if (here != &self->ring_home) {
cPersistentObject *object = OBJECT_FROM_RING(self, here,
context);
if (!object)
return 12;
if (object->state == cPersistent_GHOST_STATE)
/* ghost objects should not be in the ring, according
* to the ghost storage regime. Experience shows
* that this error condition is likely to be caused
* by a race condition bug somewhere */
return 13;
}
}
here = here->next;
} while (here != &self->ring_home);
if (self->ring_lock) {
if (total < expected)
/* ring is too small.
too big is ok when locked, we have already checked it is
not too big */
return 6;
} else {
if (total != expected)
return 14; /* ring size wrong, or bad ghost accounting */
}
return 0;
}
static int
ring_corrupt(ccobject *self, const char *context)
{
int code = _ring_corrupt(self, context);
if (code) {
if (!PyErr_Occurred())
PyErr_Format(PyExc_RuntimeError,
"broken ring (code %d) in %s, size %d",
code, context, PyDict_Size(self->data));
return code;
}
return 0;
}
static int
present_in_ring(ccobject *self,CPersistentRing *target)
{
CPersistentRing *here = self->ring_home.next;
while (1) {
if (here == target)
return 1;
if (here == &self->ring_home)
return 0; /* back to the home position, and we didnt find it */
here = here->next;
}
}
#endif /* MUCH_RING_CHECKING */
static PyMappingMethods cc_as_mapping = {
(inquiry)cc_length, /*mp_length*/
(binaryfunc)cc_subscript, /*mp_subscript*/
......@@ -1174,10 +958,4 @@ initcPickleCache(void)
d = PyModule_GetDict(m);
PyDict_SetItemString(d, "cache_variant", PyString_FromString("stiff/c"));
#ifdef MUCH_RING_CHECKING
PyDict_SetItemString(d, "MUCH_RING_CHECKING", PyInt_FromLong(1));
#else
PyDict_SetItemString(d, "MUCH_RING_CHECKING", PyInt_FromLong(0));
#endif
}
src/persistent/cPickleCache.c
View file @ 2f5e79ed
......@@ -88,7 +88,7 @@ process must skip such objects, rather than deactivating them.
static char cPickleCache_doc_string[] =
"Defines the PickleCache used by ZODB Connection objects.\n"
"\n"
"$Id: cPickleCache.c,v 1.68 2002/06/11 02:34:22 jeremy Exp $\n";
"$Id: cPickleCache.c,v 1.69 2002/10/23 19:18:35 jeremy Exp $\n";
#define ASSIGN(V,E) {PyObject *__e; __e=(E); Py_XDECREF(V); (V)=__e;}
#define UNLESS(E) if(!(E))
......@@ -159,73 +159,9 @@ object_from_oid(ccobject *self, PyObject *key)
return v;
}
/* define this for extra debugging checks, and lousy performance.
Not really necessary in production code... disable this before
release, providing noone has been reporting and RuntimeErrors
that it uses to report problems.
*/
/* #define MUCH_RING_CHECKING */
#ifdef MUCH_RING_CHECKING
static int present_in_ring(ccobject *self, CPersistentRing *target);
static int ring_corrupt(ccobject *self, const char *context);
#define IS_RING_CORRUPT(OBJ, CTX) ring_corrupt((OBJ), (CTX))
#define OBJECT_FROM_RING(SELF, HERE, CTX) \
object_from_ring((SELF), (HERE), (CTX))
static cPersistentObject *
object_from_ring(ccobject *self, CPersistentRing *here, const char *context)
{
/* Given a position in the LRU ring, return a borrowed
reference to the object at that point in the ring. The caller is
responsible for ensuring that this ring position really does
correspond to a persistent object, although the debugging
version will double-check this. */
PyObject *object;
/* given a pointer to a ring slot in a cPersistent_HEAD, we want to get
* the pointer to the Python object that slot is embedded in.
*/
object = (PyObject *)(((char *)here) - offsetof(cPersistentObject, ring));
if (!PyExtensionInstance_Check(object)) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered non-ExtensionClass object in %s",
context);
return NULL;
}
if (!(((PyExtensionClass*)(object->ob_type))->class_flags & PERSISTENT_TYPE_FLAG)) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered non-persistent object in %s", context);
return NULL;
}
if (((cPersistentObject*)object)->jar != self->jar) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered object from a different jar in %s",
context);
return NULL;
}
if (((cPersistentObject *)object)->cache != (PerCache *)self) {
PyErr_Format(PyExc_RuntimeError,
"Unexpectedly encountered broken ring in %s", context);
return NULL;
}
return (cPersistentObject *)object;
}
#else /* MUCH_RING_CHECKING */
#define IS_RING_CORRUPT(OBJ, CTX) 0
#define OBJECT_FROM_RING(SELF, HERE, CTX) \
((cPersistentObject *)(((char *)here) - offsetof(cPersistentObject, ring)))
#endif
static int
scan_gc_items(ccobject *self,int target)
{
......@@ -238,44 +174,11 @@ scan_gc_items(ccobject *self,int target)
CPersistentRing placeholder;
CPersistentRing *here = self->ring_home.next;
#ifdef MUCH_RING_CHECKING
int safety_counter = self->cache_size * 10;
if (safety_counter < 10000)
safety_counter = 10000;
#endif
/* Scan through the ring until we either find the ring_home (i.e. start
* of the ring, or we've ghosted enough objects to reach the target
* size.
*/
while (1) {
if (IS_RING_CORRUPT(self, "mid-gc"))
return -1;
#ifdef MUCH_RING_CHECKING
if (!safety_counter--) {
/* This loop has been running for a very long time. It is
possible that someone loaded a very large number of objects,
and now wants us to blow them all away. However it may also
indicate a logic error. If the loop has been running this
long then you really have to doubt it will ever terminate.
In the MUCH_RING_CHECKING build we prefer to raise an
exception here
*/
PyErr_SetString(PyExc_RuntimeError,
"scan_gc_items safety counter exceeded");
return -1;
}
if (!present_in_ring(self, here)) {
/* Our current working position is no longer in the ring.
That's bad. */
PyErr_SetString(PyExc_RuntimeError,
"working position fell out the ring, in scan_gc_items");
return -1;
}
#endif
/* back to the home position. stop looking */
if (here == &self->ring_home)
return 0;
......@@ -345,8 +248,6 @@ lockgc(ccobject *self, int target_size)
return Py_None;
}
if (IS_RING_CORRUPT(self, "pre-gc"))
return NULL;
ENGINE_NOISE("<");
self->ring_lock = 1;
if (scan_gc_items(self, target_size)) {
......@@ -355,8 +256,6 @@ lockgc(ccobject *self, int target_size)
}
self->ring_lock = 0;
ENGINE_NOISE(">\n");
if (IS_RING_CORRUPT(self, "post-gc"))
return NULL;
Py_INCREF(Py_None);
return Py_None;
......@@ -549,9 +448,6 @@ cc_lru_items(ccobject *self, PyObject *args)
return NULL;
}
if (IS_RING_CORRUPT(self, "pre-cc_items"))
return NULL;
l = PyList_New(0);
if (l == NULL)
return NULL;
......@@ -701,9 +597,6 @@ cc_getattr(ccobject *self, char *name)
{
PyObject *r;
if (IS_RING_CORRUPT(self, "getattr"))
return NULL;
if(*name=='c')
{
if(strcmp(name,"cache_age")==0)
......@@ -776,9 +669,6 @@ cc_subscript(ccobject *self, PyObject *key)
{
PyObject *r;
if (IS_RING_CORRUPT(self, "__getitem__"))
return NULL;
r = (PyObject *)object_from_oid(self, key);
if (r == NULL) {
PyErr_SetObject(PyExc_KeyError, key);
......@@ -884,8 +774,6 @@ cc_add_item(ccobject *self, PyObject *key, PyObject *v)
*/
}
if (IS_RING_CORRUPT(self, "pre-setitem"))
return -1;
if (PyDict_SetItem(self->data, key, v) < 0)
return -1;
......@@ -906,10 +794,7 @@ cc_add_item(ccobject *self, PyObject *key, PyObject *v)
Py_DECREF(v);
}
if (IS_RING_CORRUPT(self, "post-setitem"))
return -1;
else
return 0;
return 0;
}
static int
......@@ -919,9 +804,6 @@ cc_del_item(ccobject *self, PyObject *key)
cPersistentObject *p;
/* unlink this item from the ring */
if (IS_RING_CORRUPT(self, "pre-delitem"))
return -1;
v = (PyObject *)object_from_oid(self, key);
if (v == NULL)
return -1;
......@@ -957,9 +839,6 @@ cc_del_item(ccobject *self, PyObject *key)
return -1;
}
if (IS_RING_CORRUPT(self, "post-delitem"))
return -1;
return 0;
}
......@@ -978,101 +857,6 @@ cc_ass_sub(ccobject *self, PyObject *key, PyObject *v)
return cc_del_item(self, key);
}
#ifdef MUCH_RING_CHECKING
static int
_ring_corrupt(ccobject *self, const char *context)
{
CPersistentRing *here = &(self->ring_home);
/* Determine the number of objects we expect to see in the ring.
* Normally this is one for the home node plus one for each
* non-ghost object, for which we maintain a separate total. If the
* ring is unlocked then this value should be precise; there should
* be no foreign nodes in the ring. If locked, it may be an
* underestimate */
int expected = 1 + self->non_ghost_count;
int total = 0;
do {
if (++total > (expected + 10))
/* ring too big, by a large margin. This probably
* means we are stomping through random memory. Abort
* now, and maybe we can deliver this error message
* before dumping core */
return 3;
if (!here->next)
return 4; /* various linking problems */
if (!here->prev)
return 5;
if (!here->next->prev)
return 7;
if (!here->prev->next)
return 8;
if (here->prev->next != here)
return 9;
if (here->next->prev != here)
return 10;
if (!self->ring_lock) {
/* If the ring is unlocked, then it must not contain
* objects other than persistent instances (and the home) */
if (here != &self->ring_home) {
cPersistentObject *object = OBJECT_FROM_RING(self, here,
context);
if (!object)
return 12;
if (object->state == cPersistent_GHOST_STATE)
/* ghost objects should not be in the ring, according
* to the ghost storage regime. Experience shows
* that this error condition is likely to be caused
* by a race condition bug somewhere */
return 13;
}
}
here = here->next;
} while (here != &self->ring_home);
if (self->ring_lock) {
if (total < expected)
/* ring is too small.
too big is ok when locked, we have already checked it is
not too big */
return 6;
} else {
if (total != expected)
return 14; /* ring size wrong, or bad ghost accounting */
}
return 0;
}
static int
ring_corrupt(ccobject *self, const char *context)
{
int code = _ring_corrupt(self, context);
if (code) {
if (!PyErr_Occurred())
PyErr_Format(PyExc_RuntimeError,
"broken ring (code %d) in %s, size %d",
code, context, PyDict_Size(self->data));
return code;
}
return 0;
}
static int
present_in_ring(ccobject *self,CPersistentRing *target)
{
CPersistentRing *here = self->ring_home.next;
while (1) {
if (here == target)
return 1;
if (here == &self->ring_home)
return 0; /* back to the home position, and we didnt find it */
here = here->next;
}
}
#endif /* MUCH_RING_CHECKING */
static PyMappingMethods cc_as_mapping = {
(inquiry)cc_length, /*mp_length*/
(binaryfunc)cc_subscript, /*mp_subscript*/
......@@ -1174,10 +958,4 @@ initcPickleCache(void)
d = PyModule_GetDict(m);
PyDict_SetItemString(d, "cache_variant", PyString_FromString("stiff/c"));
#ifdef MUCH_RING_CHECKING
PyDict_SetItemString(d, "MUCH_RING_CHECKING", PyInt_FromLong(1));
#else
PyDict_SetItemString(d, "MUCH_RING_CHECKING", PyInt_FromLong(0));
#endif
}
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