add memory creation logging

crates/wasmtime-backend/src/lib.rs

@@ -68,7 +68,29 @@ impl WasmBackend for WasmtimeWasmBackend {
     }
 }
 
+#[derive(Default)]
+struct MyStoreLimiter {
+    memories: i32
+}
+
+impl wasmtime::ResourceLimiter for MyStoreLimiter {
+    fn memory_growing(&mut self, current: usize, desired: usize, maximum: Option<usize>) -> bool {
+        if current == 0 {
+            self.memories += 1;
+            log::debug!("Wasmtime created a memory. Total memories in this Store: {}", self.memories)
+        }
+
+        true
+    }
+
+    fn table_growing(&mut self, current: u32, desired: u32, maximum: Option<u32>) -> bool {
+        true
+    }
+}
+
+
 #[derive(Default)]
 pub struct StoreState {
     wasi: Vec<WasiCtx>, // wasmtime store does not release memory until drop, so do we
+    limiter: MyStoreLimiter,
 }

crates/wasmtime-backend/src/store.rs

@@ -19,7 +19,7 @@ use crate::WasmtimeWasmBackend;
 
 use marine_wasm_backend_traits::prelude::*;
 
-use wasmtime::StoreContext;
+use wasmtime::{ResourceLimiter, StoreContext};
 use wasmtime::StoreContextMut;
 use wasmtime::AsContext as WasmtimeAsContext;
 use wasmtime::AsContextMut as WasmtimeAsContextMut;
@@ -45,9 +45,13 @@ pub struct WasmtimeContextMut<'s> {
 
 impl Store<WasmtimeWasmBackend> for WasmtimeStore {
     fn new(backend: &WasmtimeWasmBackend) -> Self {
-        Self {
+        let mut res = Self {
             inner: wasmtime::Store::new(&backend.engine, <_>::default()),
-        }
+        };
+
+        res.inner.limiter(|ctx| &mut ctx.limiter);
+
+        res
     }
 }