#include <string.h>
+__BEGIN_DECLS
+#include <vm/vm_kern.h>
+__END_DECLS
+
#include <libkern/c++/OSData.h>
#include <libkern/c++/OSSerialize.h>
#include <libkern/c++/OSLib.h>
#include <libkern/c++/OSString.h>
-#include <string.h>
+#include <IOKit/IOLib.h>
#define super OSObject
OSDefineMetaClassAndStructors(OSData, OSObject)
-OSMetaClassDefineReservedUnused(OSData, 0);
+OSMetaClassDefineReservedUsed(OSData, 0); // setDeallocFunction
OSMetaClassDefineReservedUnused(OSData, 1);
OSMetaClassDefineReservedUnused(OSData, 2);
OSMetaClassDefineReservedUnused(OSData, 3);
#define EXTERNAL ((unsigned int) -1)
-#if OSALLOCDEBUG
-extern int debug_container_malloc_size;
-#define ACCUMSIZE(s) do { debug_container_malloc_size += (s); } while(0)
-#else
-#define ACCUMSIZE(s)
-#endif
-
bool OSData::initWithCapacity(unsigned int inCapacity)
{
+ if (data)
+ {
+ OSCONTAINER_ACCUMSIZE(-((size_t)capacity));
+ if (!inCapacity || (capacity < inCapacity))
+ {
+ // clean out old data's storage if it isn't big enough
+ if (capacity < page_size) kfree(data, capacity);
+ else kmem_free(kernel_map, (vm_offset_t)data, capacity);
+ data = 0;
+ capacity = 0;
+ }
+ }
+
if (!super::init())
return false;
- if (data && (!inCapacity || capacity < inCapacity) ) {
- // clean out old data's storage if it isn't big enough
- kfree(data, capacity);
- data = 0;
- ACCUMSIZE(-capacity);
- }
-
if (inCapacity && !data) {
- data = (void *) kalloc(inCapacity);
+
+ if (inCapacity < page_size) data = (void *) kalloc_container(inCapacity);
+ else {
+ kern_return_t kr;
+ if (round_page_overflow(inCapacity, &inCapacity)) kr = KERN_RESOURCE_SHORTAGE;
+ else kr = kmem_alloc(kernel_map, (vm_offset_t *)&data, inCapacity, IOMemoryTag(kernel_map));
+ if (KERN_SUCCESS != kr) data = NULL;
+ }
if (!data)
return false;
capacity = inCapacity;
- ACCUMSIZE(inCapacity);
}
+ OSCONTAINER_ACCUMSIZE(capacity);
length = 0;
if (inCapacity < 16)
void OSData::free()
{
- if (capacity != EXTERNAL && data && capacity) {
- kfree(data, capacity);
- ACCUMSIZE( -capacity );
+ if ((capacity != EXTERNAL) && data && capacity) {
+ if (capacity < page_size) kfree(data, capacity);
+ else kmem_free(kernel_map, (vm_offset_t)data, capacity);
+ OSCONTAINER_ACCUMSIZE( -((size_t)capacity) );
+ } else if (capacity == EXTERNAL) {
+ DeallocFunction freemem = reserved ? reserved->deallocFunction : NULL;
+ if (freemem && data && length) {
+ freemem(data, length);
+ }
}
+ if (reserved) kfree(reserved, sizeof(ExpansionData));
super::free();
}
return capacityIncrement = increment;
}
+// xx-review: does not check for capacity == EXTERNAL
+
unsigned int OSData::ensureCapacity(unsigned int newCapacity)
{
unsigned char * newData;
+ unsigned int finalCapacity;
+ void * copydata;
+ kern_return_t kr;
if (newCapacity <= capacity)
return capacity;
- newCapacity = (((newCapacity - 1) / capacityIncrement) + 1)
+ finalCapacity = (((newCapacity - 1) / capacityIncrement) + 1)
* capacityIncrement;
- newData = (unsigned char *) kalloc(newCapacity);
-
+ // integer overflow check
+ if (finalCapacity < newCapacity) return capacity;
+
+ copydata = data;
+
+ if (finalCapacity >= page_size) {
+ // round up
+ finalCapacity = round_page_32(finalCapacity);
+ // integer overflow check
+ if (finalCapacity < newCapacity) return capacity;
+ if (capacity >= page_size) {
+ copydata = NULL;
+ kr = kmem_realloc(kernel_map,
+ (vm_offset_t)data,
+ capacity,
+ (vm_offset_t *)&newData,
+ finalCapacity,
+ IOMemoryTag(kernel_map));
+ } else {
+ kr = kmem_alloc(kernel_map, (vm_offset_t *)&newData, finalCapacity, IOMemoryTag(kernel_map));
+ }
+ if (KERN_SUCCESS != kr) newData = NULL;
+ }
+ else newData = (unsigned char *) kalloc_container(finalCapacity);
+
if ( newData ) {
- bzero(newData + capacity, newCapacity - capacity);
+ bzero(newData + capacity, finalCapacity - capacity);
+ if (copydata) bcopy(copydata, newData, capacity);
if (data) {
- bcopy(data, newData, capacity);
- kfree(data, capacity);
+ if (capacity < page_size) kfree(data, capacity);
+ else kmem_free(kernel_map, (vm_offset_t)data, capacity);
}
- ACCUMSIZE( newCapacity - capacity );
+ OSCONTAINER_ACCUMSIZE( ((size_t)finalCapacity) - ((size_t)capacity) );
data = (void *) newData;
- capacity = newCapacity;
+ capacity = finalCapacity;
}
return capacity;
if (length
&& start < length
+ && (start + inLength) >= inLength // overflow check
&& (start + inLength) <= length)
outData = (const void *) ((char *) data + start);
bool OSData::isEqualTo(const OSMetaClassBase *obj) const
{
- OSData * data;
+ OSData * otherData;
OSString * str;
- if ((data = OSDynamicCast(OSData, obj)))
- return isEqualTo(data);
+ if ((otherData = OSDynamicCast(OSData, obj)))
+ return isEqualTo(otherData);
else if ((str = OSDynamicCast (OSString, obj)))
return isEqualTo(str);
else
unsigned int i;
const unsigned char *p;
unsigned char c;
+ unsigned int serializeLength;
if (s->previouslySerialized(this)) return true;
if (!s->addXMLStartTag(this, "data")) return false;
- for (i = 0, p = (unsigned char *)data; i < length; i++, p++) {
+ serializeLength = length;
+ if (reserved && reserved->disableSerialization) serializeLength = 0;
+
+ for (i = 0, p = (unsigned char *)data; i < serializeLength; i++, p++) {
/* 3 bytes are encoded as 4 */
switch (i % 3) {
case 0:
return s->addXMLEndTag("data");
}
+
+void OSData::setDeallocFunction(DeallocFunction func)
+{
+ if (!reserved)
+ {
+ reserved = (typeof(reserved)) kalloc_container(sizeof(ExpansionData));
+ if (!reserved) return;
+ bzero(reserved, sizeof(ExpansionData));
+ }
+ reserved->deallocFunction = func;
+}
+
+void OSData::setSerializable(bool serializable)
+{
+ if (!reserved)
+ {
+ reserved = (typeof(reserved)) kalloc_container(sizeof(ExpansionData));
+ if (!reserved) return;
+ bzero(reserved, sizeof(ExpansionData));
+ }
+ reserved->disableSerialization = (!serializable);
+}
+
+bool OSData::isSerializable(void)
+{
+ return (!reserved || !reserved->disableSerialization);
+}
projects / apple / xnu.git / blobdiff