test: impprove panic reporting

Signed-off-by: Henry Gressmann <mail@henrygressmann.de>

crates/cli/src/bin.rs

@@ -117,7 +117,7 @@ fn run(module: Module, func: Option<String>, args: Vec<WasmValue>) -> Result<()>
     let instance = module.instantiate(&mut store)?;
 
     if let Some(func) = func {
-        let func = instance.get_func(&store, &func)?;
+        let func = instance.exported_func_by_name(&store, &func)?;
         let res = func.call(&mut store, &args)?;
         info!("{res:?}");
     }

crates/tinywasm/src/instance.rs

@@ -58,8 +58,17 @@ impl ModuleInstance {
         &self.0.types[addr as usize]
     }
 
+    // resolve a function address to the index of the function in the store
+    pub(crate) fn func_addr(&self, addr: FuncAddr) -> FuncAddr {
+        self.0.func_addrs[addr as usize]
+    }
+
+    pub(crate) fn func_addrs(&self) -> &[FuncAddr] {
+        &self.0.func_addrs
+    }
+
     /// Get an exported function by name
-    pub fn get_func(&self, store: &Store, name: &str) -> Result<FuncHandle> {
+    pub fn exported_func_by_name(&self, store: &Store, name: &str) -> Result<FuncHandle> {
         if self.0.store_id != store.id() {
             return Err(Error::InvalidStore);
         }
@@ -90,7 +99,7 @@ impl ModuleInstance {
         P: IntoWasmValueTuple,
         R: FromWasmValueTuple,
     {
-        let func = self.get_func(store, name)?;
+        let func = self.exported_func_by_name(store, name)?;
         Ok(TypedFuncHandle {
             func,
             marker: core::marker::PhantomData,

crates/tinywasm/src/runtime/executor/mod.rs

@@ -18,6 +18,10 @@ use traits::*;
 
 impl DefaultRuntime {
     pub(crate) fn exec(&self, store: &mut Store, stack: &mut Stack, module: ModuleInstance) -> Result<()> {
+        log::info!("exports: {:?}", module.exports());
+        log::info!("func_addrs: {:?}", module.func_addrs());
+        log::info!("store funcs: {:?}", store.data.funcs.len());
+
         // The current call frame, gets updated inside of exec_one
         let mut cf = stack.call_stack.pop()?;
 
@@ -106,8 +110,9 @@ fn exec_one(
         Call(v) => {
             debug!("start call");
             // prepare the call frame
-            let func = store.get_func(*v as usize)?;
-            let func_ty = module.func_ty(*v);
+            let func_idx = module.func_addr(*v);
+            let func = store.get_func(func_idx as usize)?;
+            let func_ty = module.func_ty(func_idx);
 
             debug!("params: {:?}", func_ty.params);
             debug!("stack: {:?}", stack.values);

crates/tinywasm/src/store.rs

@@ -124,18 +124,21 @@ impl Store {
         Ok(())
     }
 
+    /// Add functions to the store, returning their addresses in the store
     pub(crate) fn add_funcs(&mut self, funcs: Vec<Function>, idx: ModuleInstanceAddr) -> Vec<FuncAddr> {
-        let mut func_addrs = Vec::with_capacity(funcs.len());
+        let func_count = self.data.funcs.len();
+        let mut func_addrs = Vec::with_capacity(func_count);
         for (i, func) in funcs.into_iter().enumerate() {
             self.data.funcs.push(Rc::new(FunctionInstance {
                 func,
                 _module_instance: idx,
             }));
-            func_addrs.push(i as FuncAddr);
+            func_addrs.push((i + func_count) as FuncAddr);
         }
         func_addrs
     }
 
+    /// Get the function at the actual index in the store
     pub(crate) fn get_func(&self, addr: usize) -> Result<&Rc<FunctionInstance>> {
         self.data
             .funcs

crates/tinywasm/tests/testsuite/mod.rs

@@ -161,8 +161,6 @@ impl TestGroup {
     }
 
     fn stats(&self) -> (usize, usize) {
-        log::error!("stats: {:?}", self.tests);
-
         let mut passed_count = 0;
         let mut failed_count = 0;
 

crates/tinywasm/tests/testsuite/run.rs

@@ -51,7 +51,7 @@ impl TestSuite {
                     debug!("got wat module");
 
                     let result = catch_unwind_silent(move || parse_module_bytes(&module.encode().unwrap()))
-                        .map_err(|e| eyre!("failed to parse module: {:?}", e))
+                        .map_err(|e| eyre!("failed to parse module: {:?}", try_downcast_panic(e)))
                         .and_then(|res| res);
 
                     match &result {
@@ -77,7 +77,7 @@ impl TestSuite {
                     };
 
                     let res = catch_unwind_silent(|| parse_module_bytes(&module))
-                        .map_err(|e| eyre!("failed to parse module: {:?}", e))
+                        .map_err(|e| eyre!("failed to parse module: {:?}", try_downcast_panic(e)))
                         .and_then(|res| res);
 
                     test_group.add_result(
@@ -96,7 +96,7 @@ impl TestSuite {
                     message: _,
                 } => {
                     let res = catch_unwind_silent(move || parse_module_bytes(&module.encode().unwrap()))
-                        .map_err(|e| eyre!("failed to parse module: {:?}", e))
+                        .map_err(|e| eyre!("failed to parse module: {:?}", try_downcast_panic(e)))
                         .and_then(|res| res);
 
                     test_group.add_result(
@@ -133,7 +133,7 @@ impl TestSuite {
                         Err(err) => test_group.add_result(
                             &format!("AssertTrap({})", i),
                             span.linecol_in(wast),
-                            Err(eyre!("test panicked: {:?}", err)),
+                            Err(eyre!("test panicked: {:?}", try_downcast_panic(err))),
                         ),
                         Ok(Err(tinywasm::Error::Trap(_))) => {
                             test_group.add_result(&format!("AssertTrap({})", i), span.linecol_in(wast), Ok(()))
@@ -222,7 +222,7 @@ impl TestSuite {
                     });
 
                     let res = res
-                        .map_err(|e| eyre!("test panicked: {:?}", e.downcast_ref::<&str>()))
+                        .map_err(|e| eyre!("test panicked: {:?}", try_downcast_panic(e)))
                         .and_then(|r| r);
 
                     test_group.add_result(

crates/tinywasm/tests/testsuite/util.rs

@@ -3,6 +3,22 @@ use std::panic;
 use eyre::{eyre, Result};
 use tinywasm_types::{TinyWasmModule, WasmValue};
 
+pub fn try_downcast_panic(panic: Box<dyn std::any::Any + Send>) -> String {
+    let info = panic
+        .downcast_ref::<panic::PanicInfo>()
+        .or(None)
+        .map(|p| p.to_string())
+        .clone();
+    let info_string = panic.downcast_ref::<String>().cloned();
+    let info_str = panic.downcast::<&str>().ok().map(|s| *s);
+
+    info.unwrap_or(
+        info_str
+            .unwrap_or(&info_string.unwrap_or("unknown panic".to_owned()))
+            .to_string(),
+    )
+}
+
 pub fn exec_fn(
     module: Option<&TinyWasmModule>,
     name: &str,
@@ -15,7 +31,7 @@ pub fn exec_fn(
     let mut store = tinywasm::Store::new();
     let module = tinywasm::Module::from(module);
     let instance = module.instantiate(&mut store)?;
-    instance.get_func(&store, name)?.call(&mut store, args)
+    instance.exported_func_by_name(&store, name)?.call(&mut store, args)
 }
 
 pub fn catch_unwind_silent<F: FnOnce() -> R + panic::UnwindSafe, R>(f: F) -> std::thread::Result<R> {