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--- xnu/xnu-1228/libkern/c++/OSObject.cpp
+++ xnu/xnu-3789.1.32/libkern/c++/OSObject.cpp
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
@@ -28,6 +28,7 @@
/* OSObject.cpp created by gvdl on Fri 1998-11-17 */
#include <libkern/c++/OSObject.h>
+#include <libkern/c++/OSString.h>
#include <libkern/c++/OSArray.h>
#include <libkern/c++/OSSerialize.h>
#include <libkern/c++/OSLib.h>
@@ -44,11 +45,6 @@
int debug_ivars_size;
__END_DECLS
-#if OSALLOCDEBUG
-#define ACCUMSIZE(s) do { debug_ivars_size += (s); } while(0)
-#else
-#define ACCUMSIZE(s)
-#endif
// OSDefineMetaClassAndAbstractStructors(OSObject, 0);
/* Class global data */
@@ -57,8 +53,6 @@
const OSMetaClass * const OSObject::superClass = 0;
/* Class member functions - Can't use defaults */
-OSObject::OSObject() { retainCount = 1; }
-OSObject::OSObject(const OSMetaClass *) { retainCount = 1; }
OSObject::~OSObject() { }
const OSMetaClass * OSObject::getMetaClass() const
{ return &gMetaClass; }
@@ -87,49 +81,11 @@
OSMetaClassDefineReservedUnused(OSObject, 14);
OSMetaClassDefineReservedUnused(OSObject, 15);
-#ifdef __ppc__
-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);
-#endif
-
static const char *getClassName(const OSObject *obj)
{
const OSMetaClass *meta = obj->getMetaClass();
return (meta) ? meta->getClassName() : "unknown class?";
}
-
-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();
-
- if (meta)
- meta->instanceDestructed();
- delete this;
-}
-#endif /* (!__ppc__) || (__GNUC__ < 3) */
int OSObject::getRetainCount() const
{
@@ -165,7 +121,7 @@
#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?";
@@ -175,7 +131,7 @@
}
newCount = origCount + inc;
- } while (!OSCompareAndSwap(origCount, newCount, (UInt32 *) countP));
+ } while (!OSCompareAndSwap(origCount, newCount, const_cast<UInt32 *>(countP)));
}
void OSObject::taggedRelease(const void *tag) const
@@ -212,7 +168,7 @@
#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",
@@ -226,23 +182,28 @@
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
@@ -255,6 +216,18 @@
taggedRetain(0);
}
+extern "C" void
+osobject_retain(void * object)
+{
+ ((OSObject *)object)->retain();
+}
+
+extern "C" void
+osobject_release(void * object)
+{
+ ((OSObject *)object)->release();
+}
+
void OSObject::release(int when) const
{
taggedRelease(0, when);
@@ -262,101 +235,87 @@
bool OSObject::serialize(OSSerialize *s) const
{
- if (s->previouslySerialized(this)) return true;
-
- if (!s->addXMLStartTag(this, "string")) return false;
-
- if (!s->addString(getClassName(this))) return false;
- if (!s->addString(" is not serializable")) return false;
-
- 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))
+ char cstr[128];
+ bool ok;
+
+ snprintf(cstr, sizeof(cstr), "%s is not serializable", getClassName(this));
+
+ OSString * str;
+ str = OSString::withCStringNoCopy(cstr);
+ if (!str) return false;
+
+ ok = str->serialize(s);
+ str->release();
+
+ return (ok);
+}
+
+void *OSObject::operator new(size_t size)
+{
+#if IOTRACKING
+ if (kIOTracking & gIOKitDebug) return (OSMetaClass::trackedNew(size));
+#endif
+
+ void * mem = kalloc_tag_bt(size, VM_KERN_MEMORY_LIBKERN);
+ assert(mem);
+ bzero(mem, size);
+ OSIVAR_ACCUMSIZE(size);
+
+ return (void *) mem;
+}
+
+void OSObject::operator delete(void * mem, size_t size)
+{
+ if (!mem) return;
+
+#if IOTRACKING
+ if (kIOTracking & gIOKitDebug) return (OSMetaClass::trackedDelete(mem, size));
+#endif
+
+ kfree(mem, size);
+ OSIVAR_ACCUMSIZE(-size);
+}
+
+bool OSObject::init()
+{
+#if IOTRACKING
+ if (kIOTracking & gIOKitDebug) getMetaClass()->trackedInstance(this);
+#endif
+ return true;
+}
+
+void OSObject::free()
+{
+ const OSMetaClass *meta = getMetaClass();
+
+ if (meta)
{
- next = queue_first(&gOSObjectTrackList);
- remque(next);
- lck_spin_unlock(&gOSObjectTrackLock);
- array->setObject((OSObject *) (next + 1));
- lck_spin_lock(&gOSObjectTrackLock);
+ meta->instanceDestructed();
+#if IOTRACKING
+ if (kIOTracking & gIOKitDebug) getMetaClass()->trackedFree(this);
+#endif
}
- lck_spin_unlock(&gOSObjectTrackLock);
-
- return (array);
-}
-
-struct OSObjectTracking
-{
- queue_chain_t link;
- void * bt[14];
-};
-
-void *OSObject::operator new(size_t 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 (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);
-}
+ delete this;
+}
+
+#if IOTRACKING
+void OSObject::trackingAccumSize(size_t size)
+{
+ if (kIOTracking & gIOKitDebug) getMetaClass()->trackedAccumSize(this, size);
+}
+#endif
+
+/* Class member functions - Can't use defaults */
+/* During constructor vtable is always OSObject's - can't call any subclass */
+
+OSObject::OSObject()
+{
+ retainCount = 1;
+// if (kIOTracking & gIOKitDebug) getMetaClass()->trackedInstance(this);
+}
+
+OSObject::OSObject(const OSMetaClass *)
+{
+ retainCount = 1;
+// if (kIOTracking & gIOKitDebug) getMetaClass()->trackedInstance(this);
+}