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--- xnu/xnu-792/libkern/c++/OSObject.cpp
+++ xnu/xnu-2422.100.13/libkern/c++/OSObject.cpp
@@ -1,33 +1,44 @@
/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* 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;
@@ -75,22 +86,6 @@
OSMetaClassDefineReservedUnused(OSObject, 13);
OSMetaClassDefineReservedUnused(OSObject, 14);
OSMetaClassDefineReservedUnused(OSObject, 15);
-OSMetaClassDefineReservedUnused(OSObject, 16);
-OSMetaClassDefineReservedUnused(OSObject, 17);
-OSMetaClassDefineReservedUnused(OSObject, 18);
-OSMetaClassDefineReservedUnused(OSObject, 19);
-OSMetaClassDefineReservedUnused(OSObject, 20);
-OSMetaClassDefineReservedUnused(OSObject, 21);
-OSMetaClassDefineReservedUnused(OSObject, 22);
-OSMetaClassDefineReservedUnused(OSObject, 23);
-OSMetaClassDefineReservedUnused(OSObject, 24);
-OSMetaClassDefineReservedUnused(OSObject, 25);
-OSMetaClassDefineReservedUnused(OSObject, 26);
-OSMetaClassDefineReservedUnused(OSObject, 27);
-OSMetaClassDefineReservedUnused(OSObject, 28);
-OSMetaClassDefineReservedUnused(OSObject, 29);
-OSMetaClassDefineReservedUnused(OSObject, 30);
-OSMetaClassDefineReservedUnused(OSObject, 31);
static const char *getClassName(const OSObject *obj)
{
@@ -101,12 +96,6 @@
bool OSObject::init()
{ return true; }
-#if (!__ppc__) || (__GNUC__ < 3)
-
-// Implemented in assembler in post gcc 3.x systems as we have a problem
-// where the destructor in gcc2.95 gets 2 arguments. The second argument
-// appears to be a flag argument. I have copied the assembler from Puma xnu
-// to OSRuntimeSupport.c So for 2.95 builds use the C
void OSObject::free()
{
const OSMetaClass *meta = getMetaClass();
@@ -115,7 +104,6 @@
meta->instanceDestructed();
delete this;
}
-#endif /* (!__ppc__) || (__GNUC__ < 3) */
int OSObject::getRetainCount() const
{
@@ -151,7 +139,7 @@
#if !DEBUG
break; // Break out of update loop which pegs the reference
-#else DEBUG
+#else /* DEBUG */
// @@@ gvdl: eventually need to make this panic optional
// based on a boot argument i.e. debug= boot flag
msg = "About to wrap the reference count, reference leak?";
@@ -161,7 +149,7 @@
}
newCount = origCount + inc;
- } while (!OSCompareAndSwap(origCount, newCount, (UInt32 *) countP));
+ } while (!OSCompareAndSwap(origCount, newCount, const_cast<UInt32 *>(countP)));
}
void OSObject::taggedRelease(const void *tag) const
@@ -198,7 +186,7 @@
#if !DEBUG
return; // return out of function which pegs the reference
-#else DEBUG
+#else /* DEBUG */
// @@@ gvdl: eventually need to make this panic optional
// based on a boot argument i.e. debug= boot flag
panic("OSObject::refcount: %s",
@@ -212,23 +200,28 @@
else
newCount = actualCount;
- } while (!OSCompareAndSwap(origCount, newCount, (UInt32 *) countP));
+ } while (!OSCompareAndSwap(origCount, newCount, const_cast<UInt32 *>(countP)));
//
// This panic means that we have just attempted to release an object
- // who's retain count has gone to less than the number of collections
+ // whose retain count has gone to less than the number of collections
// it is a member off. Take a panic immediately.
- // In Fact the panic MAY not be a registry corruption but it is
+ // In fact the panic MAY not be a registry corruption but it is
// ALWAYS the wrong thing to do. I call it a registry corruption 'cause
// the registry is the biggest single use of a network of collections.
//
- if ((UInt16) actualCount < (actualCount >> 16))
- panic("A driver releasing a(n) %s has corrupted the registry\n",
- getClassName(this));
+// xxx - this error message is overly-specific;
+// xxx - any code in the kernel could trip this,
+// xxx - and it applies as noted to all collections, not just the registry
+ if ((UInt16) actualCount < (actualCount >> 16)) {
+ panic("A kext releasing a(n) %s has corrupted the registry.",
+ getClassName(this));
+ }
// Check for a 'free' condition and that if we are first through
- if (newCount == 0xffff)
- ((OSObject *) this)->free();
+ if (newCount == 0xffff) {
+ (const_cast<OSObject *>(this))->free();
+ }
}
void OSObject::release() const
@@ -258,20 +251,91 @@
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);
}