ValueSerializer: Promote scheduled exceptions from wasm::ErrorThrower.

src/value-serializer.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/value-serializer.h"
 
 #include <type_traits>
 
 #include "src/base/logging.h"
 #include "src/conversions.h"
@@ skipping 1551 matching lines @@
   ScriptData script_data(compiled_bytes.start(), compiled_bytes.length());
   Handle<FixedArray> compiled_part;
   if (WasmCompiledModuleSerializer::DeserializeWasmModule(
           isolate_, &script_data, wire_bytes)
           .ToHandle(&compiled_part)) {
     return WasmModuleObject::New(
         isolate_, Handle<WasmCompiledModule>::cast(compiled_part));
   }
 
   // If that fails, recompile.
-  wasm::ErrorThrower thrower(isolate_, "ValueDeserializer::ReadWasmModule");
-  return wasm::CreateModuleObjectFromBytes(
-      isolate_, wire_bytes.begin(), wire_bytes.end(), &thrower,
-      wasm::ModuleOrigin::kWasmOrigin, Handle<Script>::null(),
-      Vector<const byte>::empty());
+  MaybeHandle<JSObject> result;
+  {
+    wasm::ErrorThrower thrower(isolate_, "ValueDeserializer::ReadWasmModule");
+    result = wasm::CreateModuleObjectFromBytes(
+        isolate_, wire_bytes.begin(), wire_bytes.end(), &thrower,
+        wasm::ModuleOrigin::kWasmOrigin, Handle<Script>::null(),
+        Vector<const byte>::empty());
+  }
+  RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate_, JSObject);
+  return result;
 }
 
 MaybeHandle<JSObject> ValueDeserializer::ReadHostObject() {
   if (!delegate_) return MaybeHandle<JSObject>();
   STACK_CHECK(isolate_, MaybeHandle<JSObject>());
   uint32_t id = next_id_++;
   v8::Isolate* v8_isolate = reinterpret_cast<v8::Isolate*>(isolate_);
   v8::Local<v8::Object> object;
   if (!delegate_->ReadHostObject(v8_isolate).ToLocal(&object)) {
     RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate_, JSObject);
@@ skipping 292 matching lines @@
   if (stack.size() != 1) {
     isolate_->Throw(*isolate_->factory()->NewError(
         MessageTemplate::kDataCloneDeserializationError));
     return MaybeHandle<Object>();
   }
   return scope.CloseAndEscape(stack[0]);
 }
 
 }  // namespace internal
 }  // namespace v8