void *__builtin___memcpy_chk(void *dst, const void *src, __CPROVER_size_t n, __CPROVER_size_t size)
{
__CPROVER_HIDE:
#ifdef __CPROVER_STRING_ABSTRACTION
__CPROVER_assert(__CPROVER_buffer_size(src)>=n, "memcpy buffer overflow");
__CPROVER_assert(__CPROVER_buffer_size(dst)>=n, "memcpy buffer overflow");
__CPROVER_assert(__CPROVER_buffer_size(dst)==s, "builtin object size");
// for(size_t i=0; i<n ; i++) dst[i]=src[i];
if(__CPROVER_is_zero_string(src) &&
n > __CPROVER_zero_string_length(src))
{
__CPROVER_is_zero_string(dst)=1;
__CPROVER_zero_string_length(dst)=__CPROVER_zero_string_length(src);
}
else if(!(__CPROVER_is_zero_string(dst) &&
n <= __CPROVER_zero_string_length(dst)))
__CPROVER_is_zero_string(dst)=0;
#else
__CPROVER_assert(__CPROVER_POINTER_OBJECT(dst)!=
__CPROVER_POINTER_OBJECT(src), "memcpy src/dst overlap");
(void)size;
//for(__CPROVER_size_t i=0; i<n ; i++) ((char *)dst)[i]=((const char *)src)[i];
char src_n[n];
__CPROVER_array_copy(src_n, (char*)src);
__CPROVER_array_replace((char*)dst, src_n);
#endif
return dst;
}
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;
}
void testB()
{
char arrayB1[100], arrayB2[100];
arrayB2[10]=11;
__CPROVER_array_copy(arrayB1, arrayB2);
__CPROVER_assert(arrayB1[10]==11, "arrayB1[10] is OK");
}
void *memmove(void *dest, const void *src, size_t n)
{
__CPROVER_HIDE:;
#ifdef __CPROVER_STRING_ABSTRACTION
__CPROVER_assert(__CPROVER_buffer_size(src)>=n, "memmove buffer overflow");
// dst = src (with overlap allowed)
if(__CPROVER_is_zero_string(src) &&
n > __CPROVER_zero_string_length(src))
{
__CPROVER_is_zero_string(src)=1;
__CPROVER_zero_string_length(dest)=__CPROVER_zero_string_length(src);
}
else
__CPROVER_is_zero_string(dest)=0;
#else
char src_n[n];
__CPROVER_array_copy(src_n, (char*)src);
__CPROVER_array_replace((char*)dest, src_n);
#endif
return dest;
}
