Author: rfm
Date: Fri Apr 29 09:31:48 2016
New Revision: 39708
URL: http://svn.gna.org/viewcvs/gnustep?rev=39708&view=rev
Log:
Improve checks for attempted use of a deallocate/cached autorelease pool.
Modified:
libs/base/trunk/Source/NSAutoreleasePool.m
Modified: libs/base/trunk/Source/NSAutoreleasePool.m
URL:
http://svn.gna.org/viewcvs/gnustep/libs/base/trunk/Source/NSAutoreleasePool.m?rev=39708&r1=39707&r2=39708&view=diff
==============================================================================
--- libs/base/trunk/Source/NSAutoreleasePool.m (original)
+++ libs/base/trunk/Source/NSAutoreleasePool.m Fri Apr 29 09:31:48 2016
@@ -203,7 +203,7 @@
/* When the _released_count of a pool gets over this value, we raise
an exception. This can be adjusted with +setPoolCountThreshhold */
-static unsigned pool_count_warning_threshhold = UINT_MAX;
+static unsigned pool_count_warning_threshhold = UINT_MAX-1;
/* When the number of pools in a thread gets over this value, we raise
an exception. This can be adjusted with +setPoolNumberThreshhold */
@@ -300,7 +300,15 @@
{
NSAutoreleasePool *p = pop_pool_from_cache (tv);
- NSAssert(++(p->_released_count) == 0, @"corrupted pool in cache");
+ /* When we cache a 'deallocated' pool, we set its _released_count to
+ * UINT_MAX, so when we rtrieve it fromm the cache we must increment
+ * it to start with a count of zero.
+ */
+ if (++(p->_released_count) != 0)
+ {
+ [NSException raise: NSInternalInconsistencyException
+ format: @"NSAutoreleasePool corrupted pool in cache"];
+ }
return p;
}
return NSAllocateObject (self, 0, zone);
@@ -331,6 +339,7 @@
{
struct autorelease_thread_vars *tv = ARP_THREAD_VARS;
unsigned level = 0;
+
_parent = tv->current_pool;
if (_parent)
{
@@ -536,8 +545,10 @@
return;
if (_released_count >= pool_count_warning_threshhold)
- [NSException raise: NSGenericException
- format: @"AutoreleasePool count threshhold exceeded."];
+ {
+ [NSException raise: NSGenericException
+ format: @"AutoreleasePool count threshhold exceeded."];
+ }
/* Get a new array for the list, if the current one is full. */
while (_released->count == _released->size)
@@ -707,7 +718,14 @@
{
struct autorelease_thread_vars *tv = ARP_THREAD_VARS;
+ if (UINT_MAX == _released_count)
+ {
+ [NSException raise: NSInternalInconsistencyException
+ format: @"NSAutoreleasePool -dealloc of deallocated pool"];
+ }
+
[self emptyPool];
+ NSAssert(0 == _released_count, NSInternalInconsistencyException);
/* Remove self from the linked list of pools in use.
* We already know that we have deallocated any child (in -emptyPool),
@@ -725,12 +743,11 @@
_parent = nil;
}
- if (_released_count-- != 0)
- {
- _released_count++;
- [NSException raise: NSInternalInconsistencyException
- format: @"NSAutoreleasePool -dealloc of deallocated pool"];
- }
+ /* Mark pool as cached so that any attempt to add an object to use it
+ * or to deallocate it again will raise an exception.
+ * We reset to zero when we get i out of the cache as a new allocation.
+ */
+ _released_count = UINT_MAX;
/* Don't deallocate ourself, just save us for later use. */
push_pool_to_cache (tv, self);
@@ -802,6 +819,7 @@
+ (void) setPoolCountThreshhold: (unsigned)c
{
+ if (c >= UINT_MAX) c = UINT_MAX - 1;
pool_count_warning_threshhold = c;
}
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