--- xnu/xnu-792.21.3/libkern/c++/OSObject.cpp
+++ xnu/xnu-1228/libkern/c++/OSObject.cpp
@@ -28,12 +28,17 @@
 /* OSObject.cpp created by gvdl on Fri 1998-11-17 */
 
 #include <libkern/c++/OSObject.h>
+#include <libkern/c++/OSArray.h>
 #include <libkern/c++/OSSerialize.h>
 #include <libkern/c++/OSLib.h>
+#include <libkern/OSDebug.h>
 #include <libkern/c++/OSCPPDebug.h>
+#include <IOKit/IOKitDebug.h>
 #include <libkern/OSAtomic.h>
 
 #include <libkern/c++/OSCollection.h>
+
+#include <kern/queue.h>
 
 __BEGIN_DECLS
 int debug_ivars_size;
@@ -81,6 +86,8 @@
 OSMetaClassDefineReservedUnused(OSObject, 13);
 OSMetaClassDefineReservedUnused(OSObject, 14);
 OSMetaClassDefineReservedUnused(OSObject, 15);
+
+#ifdef __ppc__
 OSMetaClassDefineReservedUnused(OSObject, 16);
 OSMetaClassDefineReservedUnused(OSObject, 17);
 OSMetaClassDefineReservedUnused(OSObject, 18);
@@ -97,6 +104,7 @@
 OSMetaClassDefineReservedUnused(OSObject, 29);
 OSMetaClassDefineReservedUnused(OSObject, 30);
 OSMetaClassDefineReservedUnused(OSObject, 31);
+#endif
 
 static const char *getClassName(const OSObject *obj)
 {
@@ -264,20 +272,91 @@
     return s->addXMLEndTag("string");
 }
 
+
+thread_t gOSObjectTrackThread;
+
+queue_head_t gOSObjectTrackList =
+    { (queue_t) &gOSObjectTrackList, (queue_t) &gOSObjectTrackList };
+
+lck_spin_t gOSObjectTrackLock;
+
+OSArray * OSFlushObjectTrackList(void)
+{
+    OSArray *     array;
+    queue_entry_t next;
+
+    array = OSArray::withCapacity(16);
+
+    lck_spin_lock(&gOSObjectTrackLock);
+    while (!queue_empty(&gOSObjectTrackList))
+    {
+	next = queue_first(&gOSObjectTrackList);
+	remque(next);
+	lck_spin_unlock(&gOSObjectTrackLock);
+	array->setObject((OSObject *) (next + 1));
+	lck_spin_lock(&gOSObjectTrackLock);
+    }
+    lck_spin_unlock(&gOSObjectTrackLock);
+
+    return (array);
+}
+
+struct OSObjectTracking
+{
+    queue_chain_t link;
+    void *	  bt[14];
+};
+
 void *OSObject::operator new(size_t size)
 {
-    void *mem = (void *) kalloc(size);
+    size_t tracking        = (gIOKitDebug & kOSTraceObjectAlloc) 
+			   ? sizeof(OSObjectTracking) : 0;
+    OSObjectTracking * mem = (OSObjectTracking *) kalloc(size + tracking);
+
     assert(mem);
+
+    if (tracking)
+    {
+	if ((((thread_t) 1) == gOSObjectTrackThread) || (current_thread() == gOSObjectTrackThread))
+	{
+	    (void) OSBacktrace(&mem->bt[0], sizeof(mem->bt) / sizeof(mem->bt[0]));
+	    lck_spin_lock(&gOSObjectTrackLock);
+	    enqueue_tail(&gOSObjectTrackList, &mem->link);
+	    lck_spin_unlock(&gOSObjectTrackLock);
+	}
+	else
+	    mem->link.next = 0;
+	mem++;
+    }
+
     bzero(mem, size);
 
     ACCUMSIZE(size);
 
-    return mem;
-}
-
-void OSObject::operator delete(void *mem, size_t size)
-{
-    kfree((vm_offset_t) mem, size);
+    return (void *) mem;
+}
+
+void OSObject::operator delete(void *_mem, size_t size)
+{
+    size_t             tracking = (gIOKitDebug & kOSTraceObjectAlloc)
+				? sizeof(OSObjectTracking) : 0;
+    OSObjectTracking * mem      = (OSObjectTracking *) _mem;
+
+    if (!mem)
+	return;
+
+    if (tracking)
+    {
+	mem--;
+	if (mem->link.next)
+	{
+	    lck_spin_lock(&gOSObjectTrackLock);
+	    remque(&mem->link);
+	    lck_spin_unlock(&gOSObjectTrackLock);
+	}
+    }
+
+    kfree(mem, size + tracking);
 
     ACCUMSIZE(-size);
 }