void* realloc(void *p, uint64_t size)
{
void *ptr;
struct boundary_tag *tag;
int real_size;
if ( size == 0 )
{
free( p );
return NULL;
}
if ( p == NULL ) return malloc( size );
liballoc_lock(); // lockit
tag = (struct boundary_tag*)((unsigned int)p - sizeof( struct boundary_tag ));
real_size = tag->size;
liballoc_unlock();
if ( real_size > size ) real_size = size;
ptr = malloc( size );
liballoc_memcpy( ptr, p, real_size );
free( p );
return ptr;
}
void* realloc(void *p, size_t size)
{
void *ptr;
struct liballoc_minor *min;
int real_size;
if ( size == 0 )
{
free( p );
return NULL;
}
if ( p == NULL ) return malloc( size );
if ( liballoc_lock != NULL ) liballoc_lock(); // lockit
min = (struct liballoc_minor*)((unsigned int)p - sizeof( struct liballoc_minor ));
real_size = min->size;
if ( liballoc_unlock != NULL ) liballoc_unlock();
if ( real_size > size ) real_size = size;
ptr = malloc( size );
liballoc_memcpy( ptr, p, real_size );
free( p );
return ptr;
}
void* PREFIX(realloc)(void *p, size_t size)
{
void *ptr;
struct liballoc_minor *min;
unsigned int real_size;
// Honour the case of size == 0 => free old and return NULL
if ( size == 0 )
{
PREFIX(free)( p );
return NULL;
}
// In the case of a NULL pointer, return a simple malloc.
if ( p == NULL ) return PREFIX(malloc)( size );
// Unalign the pointer if required.
ptr = p;
UNALIGN(ptr);
liballoc_lock(); // lockit
min = (struct liballoc_minor*)((uintptr_t)ptr - sizeof( struct liballoc_minor ));
// Ensure it is a valid structure.
if ( min->magic != LIBALLOC_MAGIC )
{
l_errorCount += 1;
// Check for overrun errors. For all bytes of LIBALLOC_MAGIC
if (
((min->magic & 0xFFFFFF) == (LIBALLOC_MAGIC & 0xFFFFFF)) ||
((min->magic & 0xFFFF) == (LIBALLOC_MAGIC & 0xFFFF)) ||
((min->magic & 0xFF) == (LIBALLOC_MAGIC & 0xFF))
)
{
l_possibleOverruns += 1;
#if defined DEBUG || defined INFO
serial_printf( "liballoc: ERROR: Possible 1-3 byte overrun for magic %x != %x\n",
min->magic,
LIBALLOC_MAGIC );
FLUSH();
#endif
}
if ( min->magic == LIBALLOC_DEAD )
{
#if defined DEBUG || defined INFO
serial_printf( "liballoc: ERROR: multiple PREFIX(free)() attempt on %x from %x.\n",
ptr,
__builtin_return_address(0) );
FLUSH();
#endif
}
else
{
#if defined DEBUG || defined INFO
serial_printf( "liballoc: ERROR: Bad PREFIX(free)( %x ) called from %x\n",
ptr,
__builtin_return_address(0) );
FLUSH();
#endif
}
// being lied to...
liballoc_unlock(); // release the lock
return NULL;
}
// Definitely a memory block.
real_size = min->req_size;
if ( real_size >= size )
{
min->req_size = size;
liballoc_unlock();
return p;
}
liballoc_unlock();
// If we got here then we're reallocating to a block bigger than us.
ptr = PREFIX(malloc)( size ); // We need to allocate new memory
liballoc_memcpy( ptr, p, real_size );
PREFIX(free)( p );
return ptr;
}