Remove UserTrapper trait

lib/runtime-core/src/backend.rs

@@ -65,10 +65,6 @@ pub trait Compiler {
     unsafe fn from_cache(&self, cache: Artifact, _: Token) -> Result<ModuleInner, CacheError>;
 }
 
-pub trait UserTrapper {
-    unsafe fn do_early_trap(&self, data: Box<dyn Any>) -> !;
-}
-
 pub trait RunnableModule: Send + Sync {
     /// This returns a pointer to the function designated by the `local_func_index`
     /// parameter.
@@ -83,7 +79,7 @@ pub trait RunnableModule: Send + Sync {
     /// signature and an invoke function that can call the trampoline.
     fn get_trampoline(&self, info: &ModuleInfo, sig_index: SigIndex) -> Option<Wasm>;
 
-    fn get_early_trapper(&self) -> Box<dyn UserTrapper>;
+    unsafe fn do_early_trap(&self, data: Box<dyn Any>) -> !;
 }
 
 pub trait CacheGen: Send + Sync {

lib/runtime-core/src/module.rs

@@ -4,7 +4,6 @@ use crate::{
     error,
     import::ImportObject,
     structures::{Map, TypedIndex},
-    typed_func::EARLY_TRAPPER,
     types::{
         FuncIndex, FuncSig, GlobalDescriptor, GlobalIndex, GlobalInit, ImportedFuncIndex,
         ImportedGlobalIndex, ImportedMemoryIndex, ImportedTableIndex, Initializer,
@@ -92,10 +91,6 @@ pub struct Module {
 
 impl Module {
     pub(crate) fn new(inner: Arc<ModuleInner>) -> Self {
-        unsafe {
-            EARLY_TRAPPER
-                .with(|ucell| *ucell.get() = Some(inner.runnable_module.get_early_trapper()));
-        }
         Module { inner }
     }
 

lib/runtime-core/src/typed_func.rs

@@ -1,5 +1,4 @@
 use crate::{
-    backend::UserTrapper,
     error::RuntimeError,
     export::{Context, Export, FuncPointer},
     import::IsExport,
@@ -8,7 +7,6 @@ use crate::{
 };
 use std::{
     any::Any,
-    cell::UnsafeCell,
     ffi::c_void,
     fmt,
     marker::PhantomData,
@@ -17,10 +15,6 @@ use std::{
     sync::Arc,
 };
 
-thread_local! {
-    pub static EARLY_TRAPPER: UnsafeCell<Option<Box<dyn UserTrapper>>> = UnsafeCell::new(None);
-}
-
 #[repr(C)]
 pub enum WasmTrapInfo {
     Unreachable = 0,
@@ -354,12 +348,7 @@ macro_rules! impl_traits {
                     };
 
                     unsafe {
-                        if let Some(early_trapper) = &*EARLY_TRAPPER.with(|ucell| ucell.get()) {
-                            early_trapper.do_early_trap(err)
-                        } else {
-                            eprintln!("panic handling not setup");
-                            std::process::exit(1)
-                        }
+                        (&*ctx.module).runnable_module.do_early_trap(err)
                     }
                 }
 

lib/runtime-core/src/vm.rs

@@ -22,7 +22,7 @@ pub struct Ctx {
 
     local_backing: *mut LocalBacking,
     import_backing: *mut ImportBacking,
-    module: *const ModuleInner,
+    pub(crate) module: *const ModuleInner,
 
     pub data: *mut c_void,
     pub data_finalizer: Option<fn(data: *mut c_void)>,