inline void free(void *ptr)
{
__CPROVER_HIDE:;
// If ptr is NULL, no operation is performed.
if(ptr!=0)
{
// is it dynamic?
__CPROVER_assert(__CPROVER_DYNAMIC_OBJECT(ptr),
"free argument is dynamic object");
__CPROVER_assert(__CPROVER_POINTER_OFFSET(ptr)==0,
"free argument has offset zero");
// catch double free
if(__CPROVER_deallocated==ptr)
__CPROVER_assert(0, "double free");
// catch people who try to use free(...) for stuff
// allocated with new[]
__CPROVER_assert(__CPROVER_malloc_object!=ptr ||
!__CPROVER_malloc_is_new_array,
"free called for new[] object");
// non-deterministically record as deallocated
_Bool record;
if(record) __CPROVER_deallocated=ptr;
}
}
inline void __delete(void *ptr)
{
__CPROVER_HIDE:;
// If ptr is NULL, no operation is performed.
// This is a requirement by the standard, not generosity!
if(ptr!=0)
{
// is it dynamic?
__CPROVER_assert(__CPROVER_DYNAMIC_OBJECT(ptr),
"delete argument must be dynamic object");
__CPROVER_assert(__CPROVER_POINTER_OFFSET(ptr)==0,
"delete argument must have offset zero");
// catch double delete
__CPROVER_assert(__CPROVER_deallocated!=ptr, "double delete");
// catch people who call delete for objects allocated with new[]
__CPROVER_assert(__CPROVER_malloc_object!=ptr ||
!__CPROVER_malloc_is_new_array,
"delete of array object");
// non-deterministically record as deallocated
__CPROVER_bool record=__VERIFIER_nondet___CPROVER_bool();
__CPROVER_deallocated=record?ptr:__CPROVER_deallocated;
// detect memory leaks
if(__CPROVER_memory_leak==ptr) __CPROVER_memory_leak=0;
}
}
inline void *realloc(void *ptr, __CPROVER_size_t malloc_size)
{
__CPROVER_HIDE:;
// if ptr is NULL, this behaves like malloc
if(ptr==0)
return malloc(malloc_size);
// if malloc-size is 0, allocate new minimum sized object
// and free original
if(malloc_size==0)
{
free(ptr);
return malloc(1);
}
__CPROVER_assert(__CPROVER_DYNAMIC_OBJECT(ptr),
"realloc argument is dynamic object");
// this shouldn't move if the new size isn't bigger
res=malloc(malloc_size);
__CPROVER_array_copy(res, ptr);
free(ptr);
return res;
}