Add debug prototype 2 (fork of wasmtime-debug)

lib/runtime-core/src/codegen.rs

@@ -250,6 +250,7 @@ impl<
             cache_gen,
             runnable_module: Arc::new(Box::new(exec_context)),
             info: Arc::try_unwrap(info).unwrap().into_inner().unwrap(),
+            debug_info: None,
         })
     }
 

lib/runtime-core/src/module.rs

@@ -20,12 +20,18 @@ use indexmap::IndexMap;
 use std::collections::HashMap;
 use std::sync::Arc;
 
+#[doc(hidden)]
+pub struct DebugInfo {
+    
+}
+
 /// This is used to instantiate a new WebAssembly module.
 #[doc(hidden)]
 pub struct ModuleInner {
     pub runnable_module: Arc<Box<dyn RunnableModule>>,
     pub cache_gen: Box<dyn CacheGen>,
     pub info: ModuleInfo,
+    pub debug_info: Option<DebugInfo>,
 }
 
 /// Container for module data including memories, globals, tables, imports, and exports.