implemented integer type proof for contract for fn add, sub and offset

library/core/src/ptr/mut_ptr.rs

@@ -2218,6 +2218,97 @@ impl<T: ?Sized> PartialOrd for *mut T {
 #[unstable(feature = "kani", issue = "none")]
 mod verify {
     use crate::kani;
+
+     // fn <*mut T>::add verification begin
+     macro_rules! generate_add_harness {
+        ($type:ty, $proof_name:ident) => {
+            #[allow(unused)]
+            #[kani::proof_for_contract(<*mut $type>::add)]
+            pub fn $proof_name() {
+                let mut test_val: $type = kani::any::<$type>();
+                let test_ptr: *mut $type = &mut test_val;
+                let count: usize = kani::any();
+                unsafe {
+                    test_ptr.add(count);
+                }
+            }
+        };
+    }
+
+    generate_add_harness!(i8, check_mut_add_i8);
+    generate_add_harness!(i16, check_mut_add_i16);
+    generate_add_harness!(i32, check_mut_add_i32);
+    generate_add_harness!(i64, check_mut_add_i64);
+    generate_add_harness!(i128, check_mut_add_i128);
+    generate_add_harness!(isize, check_mut_add_isize);
+    generate_add_harness!(u8, check_mut_add_u8);
+    generate_add_harness!(u16, check_mut_add_u16);
+    generate_add_harness!(u32, check_mut_add_u32);
+    generate_add_harness!(u64, check_mut_add_u64);
+    generate_add_harness!(u128, check_mut_add_u128);
+    generate_add_harness!(usize, check_mut_add_usize);    
+    // fn <*mut T>::add verification end
+
+    // fn <*mut T>::sub verification begin
+    macro_rules! generate_sub_harness {
+        ($type:ty, $proof_name:ident) => {
+            #[allow(unused)]
+            #[kani::proof_for_contract(<*mut $type>::sub)]
+            pub fn $proof_name() {
+                let mut test_val: $type = kani::any::<$type>();
+                let test_ptr: *mut $type = &mut test_val;
+                let count: usize = kani::any();
+                unsafe {
+                    test_ptr.sub(count);
+                }
+            }
+        };
+    }
+
+    generate_sub_harness!(i8, check_mut_sub_i8);
+    generate_sub_harness!(i16, check_mut_sub_i16);
+    generate_sub_harness!(i32, check_mut_sub_i32);
+    generate_sub_harness!(i64, check_mut_sub_i64);
+    generate_sub_harness!(i128, check_mut_sub_i128);
+    generate_sub_harness!(isize, check_mut_sub_isize);
+    generate_sub_harness!(u8, check_mut_sub_u8);
+    generate_sub_harness!(u16, check_mut_sub_u16);
+    generate_sub_harness!(u32, check_mut_sub_u32);
+    generate_sub_harness!(u64, check_mut_sub_u64);
+    generate_sub_harness!(u128, check_mut_sub_u128);
+    generate_sub_harness!(usize, check_mut_sub_usize);    
+    // fn <*mut T>::sub verification end
+
+    // fn <*mut T>::offset verification begin
+    macro_rules! generate_offset_harness {
+        ($type:ty, $proof_name:ident) => {
+            #[allow(unused)]
+            #[kani::proof_for_contract(<*mut $type>::offset)]
+            pub fn $proof_name() {
+                let mut test_val: $type = kani::any::<$type>();
+                let test_ptr: *mut $type = &mut test_val;
+                let count: isize = kani::any();
+                unsafe {
+                    test_ptr.offset(count);
+                }
+            }
+        };
+    }
+
+    generate_offset_harness!(i8, check_mut_offset_i8);
+    generate_offset_harness!(i16, check_mut_offset_i16);
+    generate_offset_harness!(i32, check_mut_offset_i32);
+    generate_offset_harness!(i64, check_mut_offset_i64);
+    generate_offset_harness!(i128, check_mut_offset_i128);
+    generate_offset_harness!(isize, check_mut_offset_isize);
+    generate_offset_harness!(u8, check_mut_offset_u8);
+    generate_offset_harness!(u16, check_mut_offset_u16);
+    generate_offset_harness!(u32, check_mut_offset_u32);
+    generate_offset_harness!(u64, check_mut_offset_u64);
+    generate_offset_harness!(u128, check_mut_offset_u128);
+    generate_offset_harness!(usize, check_mut_offset_usize);
+    // fn <*mut T>::offset verification end
+
     macro_rules! generate_unit_harness {
         ($fn_name:ident, $proof_name:ident) => {
             #[allow(unused)]