Use OwnedPtr in ListObserver (#1961)

* aaa

* clp

fuzzers/tinyinst_simple/src/main.rs

@@ -18,6 +18,7 @@ use libafl_bolts::shmem::UnixShMemProvider;
 #[cfg(windows)]
 use libafl_bolts::shmem::Win32ShMemProvider;
 use libafl_bolts::{
+    ownedref::OwnedMutPtr,
     rands::{RandomSeed, StdRand},
     shmem::ShMemProvider,
     tuples::tuple_list,
@@ -39,7 +40,8 @@ fn main() {
     // use file to pass testcases
     // let args = vec!["test.exe".to_string(), "-f".to_string(), "@@".to_string()];
 
-    let observer = unsafe { ListObserver::new("cov", &mut COVERAGE) };
+    let coverage = unsafe { OwnedMutPtr::Ptr(core::ptr::addr_of_mut!(COVERAGE)) };
+    let observer = ListObserver::new("cov", coverage);
     let mut feedback = ListFeedback::new(&observer);
     #[cfg(windows)]
     let mut shmem_provider = Win32ShMemProvider::new().unwrap();

libafl/src/observers/list.rs

@@ -32,10 +32,10 @@ where
     /// Will dereference the list.
     /// The list may not move in memory.
     #[must_use]
-    pub unsafe fn new(name: &'static str, list: *mut Vec<T>) -> Self {
+    pub fn new(name: &'static str, list: OwnedMutPtr<Vec<T>>) -> Self {
         Self {
             name: name.to_string(),
-            list: OwnedMutPtr::Ptr(list),
+            list,
         }
     }