Use get_memory helpers in more places (#1224)

* use get_memory utility method

* add new inline annotations to load/store handlers

crates/wasmi/src/engine/executor/instrs/load.rs

@@ -67,12 +67,7 @@ impl Executor<'_> {
         'exec: 'bytes,
         'store: 'bytes,
     {
-        // Safety: the underlying instance of `self.cache` is always kept up-to-date conservatively.
-        let memory = unsafe {
-            self.cache
-                .get_memory(memory)
-                .unwrap_or_else(|| panic!("missing linear memory for {memory:?}"))
-        };
+        let memory = self.get_memory(memory);
         store.resolve_memory(&memory).data()
     }
 

crates/wasmi/src/engine/executor/instrs/store.rs

@@ -57,13 +57,15 @@ impl Executor<'_> {
     }
 
     /// Fetches the bytes of the default memory at index 0.
+    #[inline]
     fn fetch_default_memory_bytes_mut(&mut self) -> &mut [u8] {
         // Safety: the `self.cache.memory` pointer is always synchronized
         //         conservatively whenever it could have been invalidated.
         unsafe { self.cache.memory.data_mut() }
     }
 
     /// Fetches the bytes of the given `memory`.
+    #[inline]
     fn fetch_memory_bytes_mut<'exec, 'store, 'bytes>(
         &'exec mut self,
         memory: Memory,
@@ -81,6 +83,7 @@ impl Executor<'_> {
 
     /// Fetches the bytes of the given non-default `memory`.
     #[cold]
+    #[inline]
     fn fetch_non_default_memory_bytes_mut<'exec, 'store, 'bytes>(
         &'exec mut self,
         memory: Memory,
@@ -90,12 +93,7 @@ impl Executor<'_> {
         'exec: 'bytes,
         'store: 'bytes,
     {
-        // Safety: the underlying instance of `self.cache` is always kept up-to-date conservatively.
-        let memory = unsafe {
-            self.cache
-                .get_memory(memory)
-                .unwrap_or_else(|| panic!("missing linear memory for {memory:?}"))
-        };
+        let memory = self.get_memory(memory);
         store.resolve_memory_mut(&memory).data_mut()
     }