nac3artiq: handle name_to_pyid in compilation

python variables can change between kernel invocations

nac3artiq/src/lib.rs

@@ -15,7 +15,7 @@ use nac3parser::{
     parser::{self, parse_program},
 };
 use pyo3::prelude::*;
-use pyo3::{exceptions, types::PyBytes, types::PyList, types::PySet};
+use pyo3::{exceptions, types::PyBytes, types::PyDict, types::PySet};
 
 use parking_lot::{Mutex, RwLock};
 
@@ -63,12 +63,7 @@ pub struct PrimitivePythonId {
     virtual_id: u64,
 }
 
-type TopLevelComponent = (
-    Stmt,
-    Arc<dyn SymbolResolver + Send + Sync>,
-    String,
-    Rc<HashMap<StrRef, u64>>,
-);
+type TopLevelComponent = (Stmt, String, PyObject);
 
 // TopLevelComposer is unsendable as it holds the unification table, which is
 // unsendable due to Rc. Arc would cause a performance hit.
@@ -94,35 +89,13 @@ impl Nac3 {
         module: PyObject,
         registered_class_ids: &HashSet<u64>,
     ) -> PyResult<()> {
-        let mut name_to_pyid: HashMap<StrRef, u64> = HashMap::new();
-        let (module_name, source_file, helper) =
-            Python::with_gil(|py| -> PyResult<(String, String, PythonHelper)> {
-                let module: &PyAny = module.extract(py)?;
-                let builtins = PyModule::import(py, "builtins")?;
-                let id_fn = builtins.getattr("id")?;
-                let members: &PyList = PyModule::import(py, "inspect")?
-                    .getattr("getmembers")?
-                    .call1((module,))?
-                    .cast_as()?;
-                for member in members.iter() {
-                    let key: &str = member.get_item(0)?.extract()?;
-                    let val = id_fn.call1((member.get_item(1)?,))?.extract()?;
-                    name_to_pyid.insert(key.into(), val);
-                }
-                let typings = PyModule::import(py, "typing")?;
-                let helper = PythonHelper {
-                    id_fn: builtins.getattr("id").unwrap().to_object(py),
-                    len_fn: builtins.getattr("len").unwrap().to_object(py),
-                    type_fn: builtins.getattr("type").unwrap().to_object(py),
-                    origin_ty_fn: typings.getattr("get_origin").unwrap().to_object(py),
-                    args_ty_fn: typings.getattr("get_args").unwrap().to_object(py),
-                };
-                Ok((
-                    module.getattr("__name__")?.extract()?,
-                    module.getattr("__file__")?.extract()?,
-                    helper,
-                ))
-            })?;
+        let (module_name, source_file) = Python::with_gil(|py| -> PyResult<(String, String)> {
+            let module: &PyAny = module.extract(py)?;
+            Ok((
+                module.getattr("__name__")?.extract()?,
+                module.getattr("__file__")?.extract()?,
+            ))
+        })?;
 
         let source = fs::read_to_string(source_file).map_err(|e| {
             exceptions::PyIOError::new_err(format!("failed to read input file: {}", e))
@@ -130,20 +103,6 @@ impl Nac3 {
         let parser_result = parser::parse_program(&source)
             .map_err(|e| exceptions::PySyntaxError::new_err(format!("parse error: {}", e)))?;
 
-        let resolver = Arc::new(Resolver(Arc::new(InnerResolver {
-            id_to_type: self.builtins_ty.clone().into(),
-            id_to_def: self.builtins_def.clone().into(),
-            pyid_to_def: self.pyid_to_def.clone(),
-            pyid_to_type: self.pyid_to_type.clone(),
-            primitive_ids: self.primitive_ids.clone(),
-            global_value_ids: self.global_value_ids.clone(),
-            class_names: Default::default(),
-            name_to_pyid: name_to_pyid.clone(),
-            module: module.clone(),
-            helper,
-        }))) as Arc<dyn SymbolResolver + Send + Sync>;
-        let name_to_pyid = Rc::new(name_to_pyid);
-
         for mut stmt in parser_result.into_iter() {
             let include = match stmt.node {
                 ast::StmtKind::ClassDef {
@@ -209,12 +168,8 @@ impl Nac3 {
             };
 
             if include {
-                self.top_levels.push((
-                    stmt,
-                    resolver.clone(),
-                    module_name.clone(),
-                    name_to_pyid.clone(),
-                ));
+                self.top_levels
+                    .push((stmt, module_name.clone(), module.clone()));
             }
         }
         Ok(())
@@ -423,7 +378,54 @@ impl Nac3 {
         let (mut composer, _, _) = TopLevelComposer::new(self.builtins.clone());
         let mut id_to_def = HashMap::new();
         let mut id_to_type = HashMap::new();
-        for (stmt, resolver, path, name_to_pyid) in self.top_levels.iter() {
+
+        let builtins = PyModule::import(py, "builtins")?;
+        let typings = PyModule::import(py, "typing")?;
+        let id_fn = builtins.getattr("id")?;
+        let helper = PythonHelper {
+            id_fn: builtins.getattr("id").unwrap().to_object(py),
+            len_fn: builtins.getattr("len").unwrap().to_object(py),
+            type_fn: builtins.getattr("type").unwrap().to_object(py),
+            origin_ty_fn: typings.getattr("get_origin").unwrap().to_object(py),
+            args_ty_fn: typings.getattr("get_args").unwrap().to_object(py),
+        };
+        let mut module_to_resolver_cache: HashMap<u64, _> = HashMap::new();
+
+        for (stmt, path, module) in self.top_levels.iter() {
+            let py_module: &PyAny = module.extract(py)?;
+            let module_id: u64 = id_fn.call1((py_module,))?.extract()?;
+            let helper = helper.clone();
+            let (name_to_pyid, resolver) = module_to_resolver_cache
+                .get(&module_id)
+                .cloned()
+                .unwrap_or_else(|| {
+                    let mut name_to_pyid: HashMap<StrRef, u64> = HashMap::new();
+                    let members: &PyDict =
+                        py_module.getattr("__dict__").unwrap().cast_as().unwrap();
+                    for (key, val) in members.iter() {
+                        let key: &str = key.extract().unwrap();
+                        let val = id_fn.call1((val,)).unwrap().extract().unwrap();
+                        name_to_pyid.insert(key.into(), val);
+                    }
+                    let resolver = Arc::new(Resolver(Arc::new(InnerResolver {
+                        id_to_type: self.builtins_ty.clone().into(),
+                        id_to_def: self.builtins_def.clone().into(),
+                        pyid_to_def: self.pyid_to_def.clone(),
+                        pyid_to_type: self.pyid_to_type.clone(),
+                        primitive_ids: self.primitive_ids.clone(),
+                        global_value_ids: self.global_value_ids.clone(),
+                        class_names: Default::default(),
+                        name_to_pyid: name_to_pyid.clone(),
+                        module: module.clone(),
+                        helper,
+                    })))
+                        as Arc<dyn SymbolResolver + Send + Sync>;
+                    let name_to_pyid = Rc::new(name_to_pyid);
+                    module_to_resolver_cache
+                        .insert(module_id, (name_to_pyid.clone(), resolver.clone()));
+                    (name_to_pyid, resolver)
+                });
+
             let (name, def_id, ty) = composer
                 .register_top_level(stmt.clone(), Some(resolver.clone()), path.clone())
                 .unwrap();

nac3artiq/src/symbol_resolver.rs

@@ -39,6 +39,7 @@ pub struct InnerResolver {
 
 pub struct Resolver(pub Arc<InnerResolver>);
 
+#[derive(Clone)]
 pub struct PythonHelper {
     pub type_fn: PyObject,
     pub len_fn: PyObject,