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--- xnu/xnu-517.3.15/libkern/c++/OSArray.cpp
+++ xnu/xnu-4570.71.2/libkern/c++/OSArray.cpp
@@ -1,16 +1,19 @@
/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* 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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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.
+ *
+ * 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
@@ -20,15 +23,17 @@
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* IOArray.m created by rsulack on Fri 12-Sep-1997 */
/* IOArray.cpp converted to C++ by gvdl on Fri 1998-10-30 */
#include <libkern/c++/OSArray.h>
+#include <libkern/c++/OSDictionary.h>
#include <libkern/c++/OSSerialize.h>
#include <libkern/c++/OSLib.h>
+#include <libkern/OSDebug.h>
#define super OSCollection
@@ -42,24 +47,23 @@
OSMetaClassDefineReservedUnused(OSArray, 6);
OSMetaClassDefineReservedUnused(OSArray, 7);
-#if OSALLOCDEBUG
-extern "C" {
- extern int debug_container_malloc_size;
-};
-#define ACCUMSIZE(s) do { debug_container_malloc_size += (s); } while(0)
-#else
-#define ACCUMSIZE(s)
-#endif
+
+#define EXT_CAST(obj) \
+ reinterpret_cast<OSObject *>(const_cast<OSMetaClassBase *>(obj))
bool OSArray::initWithCapacity(unsigned int inCapacity)
{
- int size;
+ unsigned int size;
if (!super::init())
return false;
+ // integer overflow check
+ if (inCapacity > (UINT_MAX / sizeof(const OSMetaClassBase*)))
+ return false;
+
size = sizeof(const OSMetaClassBase *) * inCapacity;
- array = (const OSMetaClassBase **) kalloc(size);
+ array = (const OSMetaClassBase **) kalloc_container(size);
if (!array)
return false;
@@ -68,25 +72,25 @@
capacityIncrement = (inCapacity)? inCapacity : 16;
bzero(array, size);
- ACCUMSIZE(size);
-
- return this;
+ OSCONTAINER_ACCUMSIZE(size);
+
+ return true;
}
bool OSArray::initWithObjects(const OSObject *objects[],
unsigned int theCount,
unsigned int theCapacity)
{
- unsigned int capacity;
+ unsigned int initCapacity;
if (!theCapacity)
- capacity = theCount;
+ initCapacity = theCount;
else if (theCount > theCapacity)
return false;
else
- capacity = theCapacity;
-
- if (!objects || !initWithCapacity(capacity))
+ initCapacity = theCapacity;
+
+ if (!objects || !initWithCapacity(initCapacity))
return false;
for ( unsigned int i = 0; i < theCount; i++ ) {
@@ -153,11 +157,14 @@
void OSArray::free()
{
+ // Clear immutability - assumes the container is doing the right thing
+ (void) super::setOptions(0, kImmutable);
+
flushCollection();
if (array) {
- kfree((vm_offset_t)array, sizeof(const OSMetaClassBase *) * capacity);
- ACCUMSIZE( -(sizeof(const OSMetaClassBase *) * capacity) );
+ kfree(array, sizeof(const OSMetaClassBase *) * capacity);
+ OSCONTAINER_ACCUMSIZE( -(sizeof(const OSMetaClassBase *) * capacity) );
}
super::free();
@@ -177,27 +184,36 @@
unsigned int OSArray::ensureCapacity(unsigned int newCapacity)
{
const OSMetaClassBase **newArray;
- int oldSize, newSize;
+ unsigned int finalCapacity;
+ vm_size_t oldSize, newSize;
if (newCapacity <= capacity)
return capacity;
// round up
- newCapacity = (((newCapacity - 1) / capacityIncrement) + 1)
+ finalCapacity = (((newCapacity - 1) / capacityIncrement) + 1)
* capacityIncrement;
- newSize = sizeof(const OSMetaClassBase *) * newCapacity;
-
- newArray = (const OSMetaClassBase **) kalloc(newSize);
+
+ // integer overflow check
+ if ((finalCapacity < newCapacity) || (finalCapacity > (UINT_MAX / sizeof(const OSMetaClassBase*))))
+ return capacity;
+
+ newSize = sizeof(const OSMetaClassBase *) * finalCapacity;
+
+ newArray = (const OSMetaClassBase **) kallocp_container(&newSize);
if (newArray) {
+ // use all of the actual allocation size
+ finalCapacity = newSize / sizeof(const OSMetaClassBase *);
+
oldSize = sizeof(const OSMetaClassBase *) * capacity;
- ACCUMSIZE(newSize - oldSize);
+ OSCONTAINER_ACCUMSIZE(((size_t)newSize) - ((size_t)oldSize));
bcopy(array, newArray, oldSize);
bzero(&newArray[capacity], newSize - oldSize);
- kfree((vm_offset_t)array, oldSize);
+ kfree(array, oldSize);
array = newArray;
- capacity = newCapacity;
+ capacity = finalCapacity;
}
return capacity;
@@ -208,8 +224,9 @@
unsigned int i;
haveUpdated();
- for (i = 0; i < count; i++)
+ for (i = 0; i < count; i++) {
array[i]->taggedRelease(OSTypeID(OSCollection));
+ }
count = 0;
}
@@ -249,6 +266,9 @@
if (!otherCount)
return true;
+
+ if (newCount < count)
+ return false;
// do we need more space?
if (newCount > capacity && newCount > ensureCapacity(newCount))
@@ -333,7 +353,7 @@
if (index >= count)
return 0;
else
- return (OSObject *) array[index];
+ return (OSObject *) (const_cast<OSMetaClassBase *>(array[index]));
}
OSObject *OSArray::getLastObject() const
@@ -341,7 +361,7 @@
if (count == 0)
return 0;
else
- return (OSObject *) array[count - 1];
+ return ( OSObject *) (const_cast<OSMetaClassBase *>(array[count - 1]));
}
unsigned int OSArray::getNextIndexOfObject(const OSMetaClassBase * anObject,
@@ -373,7 +393,7 @@
unsigned int index = (*iteratorP)++;
if (index < count) {
- *ret = (OSObject *) array[index];
+ *ret = (OSObject *)(const_cast<OSMetaClassBase *> (array[index]));
return true;
}
else {
@@ -388,9 +408,80 @@
if (!s->addXMLStartTag(this, "array")) return false;
- for (unsigned i = 0; i < count; i++) {
- if (!array[i]->serialize(s)) return false;
+ for (unsigned i = 0; i < count; i++) {
+ if (array[i] == NULL || !array[i]->serialize(s)) return false;
}
return s->addXMLEndTag("array");
}
+
+unsigned OSArray::setOptions(unsigned options, unsigned mask, void *)
+{
+ unsigned old = super::setOptions(options, mask);
+ if ((old ^ options) & mask) {
+
+ // Value changed need to recurse over all of the child collections
+ for ( unsigned i = 0; i < count; i++ ) {
+ OSCollection *coll = OSDynamicCast(OSCollection, array[i]);
+ if (coll)
+ coll->setOptions(options, mask);
+ }
+ }
+
+ return old;
+}
+
+OSCollection * OSArray::copyCollection(OSDictionary *cycleDict)
+{
+ bool allocDict = !cycleDict;
+ OSCollection *ret = 0;
+ OSArray *newArray = 0;
+
+ if (allocDict) {
+ cycleDict = OSDictionary::withCapacity(16);
+ if (!cycleDict)
+ return 0;
+ }
+
+ do {
+ // Check for a cycle
+ ret = super::copyCollection(cycleDict);
+ if (ret)
+ continue;
+
+ newArray = OSArray::withArray(this);
+ if (!newArray)
+ continue;
+
+ // Insert object into cycle Dictionary
+ cycleDict->setObject((const OSSymbol *) this, newArray);
+
+ for (unsigned int i = 0; i < count; i++) {
+ OSCollection *coll =
+ OSDynamicCast(OSCollection, EXT_CAST(newArray->array[i]));
+
+ if (coll) {
+ OSCollection *newColl = coll->copyCollection(cycleDict);
+ if (!newColl)
+ goto abortCopy;
+
+ newArray->replaceObject(i, newColl);
+ newColl->release();
+ };
+ };
+
+ ret = newArray;
+ newArray = 0;
+
+ } while (false);
+
+abortCopy:
+ if (newArray)
+ newArray->release();
+
+ if (allocDict)
+ cycleDict->release();
+
+ return ret;
+}
+