[wasm] Implement {Compile,Runtime}Error; fix traps from start function

src/bootstrapper.cc

 // Copyright 2014 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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/ieee754.h"
 #include "src/code-stubs.h"
@@ skipping 1038 matching lines @@
                           factory->empty_string(), DONT_ENUM);
     JSObject::AddProperty(prototype, factory->constructor_string(), error_fun,
                           DONT_ENUM);
 
     if (context_index == Context::ERROR_FUNCTION_INDEX) {
       Handle<JSFunction> to_string_fun =
           SimpleInstallFunction(prototype, factory->toString_string(),
                                 Builtins::kErrorPrototypeToString, 0, true);
       isolate->native_context()->set_error_to_string(*to_string_fun);
     } else {
-      DCHECK(context_index != Context::ERROR_FUNCTION_INDEX);
       DCHECK(isolate->native_context()->error_to_string()->IsJSFunction());
 
       InstallFunction(prototype, isolate->error_to_string(),
                       factory->toString_string(), DONT_ENUM);
 
       Handle<JSFunction> global_error = isolate->error_function();
       CHECK(JSReceiver::SetPrototype(error_fun, global_error, false,
                                      Object::THROW_ON_ERROR)
                 .FromMaybe(false));
       CHECK(JSReceiver::SetPrototype(prototype,
@@ skipping 835 matching lines @@
                      Context::MAKE_TYPE_ERROR_INDEX);
   }
 
   {  // -- U R I E r r o r
     InstallError(isolate, global, factory->URIError_string(),
                  Context::URI_ERROR_FUNCTION_INDEX);
     InstallMakeError(isolate, isolate->builtins()->MakeURIError(),
                      Context::MAKE_URI_ERROR_INDEX);
   }
 
+  {  // -- C o m p i l e E r r o r
+    Handle<JSObject> dummy = factory->NewJSObject(isolate->object_function());
+    InstallError(isolate, dummy, factory->CompileError_string(),
+                 Context::WASM_COMPILE_ERROR_FUNCTION_INDEX);
+
+    // -- R u n t i m e E r r o r
+    InstallError(isolate, dummy, factory->RuntimeError_string(),
+                 Context::WASM_RUNTIME_ERROR_FUNCTION_INDEX);
+  }
+
   // Initialize the embedder data slot.
   Handle<FixedArray> embedder_data = factory->NewFixedArray(3);
   native_context()->set_embedder_data(*embedder_data);
 
   {  // -- J S O N
     Handle<String> name = factory->InternalizeUtf8String("JSON");
     Handle<JSFunction> cons = factory->NewFunction(name);
     JSFunction::SetInstancePrototype(cons,
         Handle<Object>(native_context()->initial_object_prototype(), isolate));
     Handle<JSObject> json_object = factory->NewJSObject(cons, TENURED);
@@ skipping 2508 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8