[wasm] Override mechanism for wasm js APIs

src/wasm/wasm-js.cc

 // Copyright 2015 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/api-natives.h"
 #include "src/api.h"
 #include "src/asmjs/asm-js.h"
 #include "src/asmjs/asm-typer.h"
 #include "src/asmjs/asm-wasm-builder.h"
 #include "src/assert-scope.h"
@@ skipping 160 matching lines @@
     return {};
   }
   Local<Object> obj = Local<Object>::Cast(args[1]);
   return i::Handle<i::JSReceiver>::cast(v8::Utils::OpenHandle(*obj));
 }
 
 // WebAssembly.compile(bytes) -> Promise
 void WebAssemblyCompile(const v8::FunctionCallbackInfo<v8::Value>& args) {
   v8::Isolate* isolate = args.GetIsolate();
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  if (i_isolate->wasm_compile_callback()(args)) return;
+
   HandleScope scope(isolate);
   ErrorThrower thrower(i_isolate, "WebAssembly.compile()");
 
   Local<Context> context = isolate->GetCurrentContext();
   v8::Local<v8::Promise::Resolver> resolver;
   if (!v8::Promise::Resolver::New(context).ToLocal(&resolver)) return;
   v8::ReturnValue<v8::Value> return_value = args.GetReturnValue();
   return_value.Set(resolver->GetPromise());
 
   auto bytes = GetFirstArgumentAsBytes(args, &thrower);
@@ skipping 24 matching lines @@
   } else {
     if (thrower.wasm_error()) thrower.Reify();  // Clear error.
     return_value.Set(v8::False(isolate));
   }
 }
 
 // new WebAssembly.Module(bytes) -> WebAssembly.Module
 void WebAssemblyModule(const v8::FunctionCallbackInfo<v8::Value>& args) {
   v8::Isolate* isolate = args.GetIsolate();
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  if (i_isolate->wasm_module_callback()(args)) return;
+
   HandleScope scope(isolate);
   ErrorThrower thrower(i_isolate, "WebAssembly.Module()");
 
   auto bytes = GetFirstArgumentAsBytes(args, &thrower);
   if (!IsCompilationAllowed(i_isolate, &thrower, args[0], false)) return;
 
   DCHECK(!thrower.error());
   i::MaybeHandle<i::Object> module_obj =
       i::wasm::SyncCompile(i_isolate, &thrower, bytes);
   if (module_obj.is_null()) return;
@@ skipping 55 matching lines @@
                                  i::Handle<i::String>::cast(name), &thrower);
   if (thrower.error()) return;
   args.GetReturnValue().Set(Utils::ToLocal(custom_sections));
 }
 
 // new WebAssembly.Instance(module, imports) -> WebAssembly.Instance
 void WebAssemblyInstance(const v8::FunctionCallbackInfo<v8::Value>& args) {
   HandleScope scope(args.GetIsolate());
   v8::Isolate* isolate = args.GetIsolate();
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  if (i_isolate->wasm_instance_callback()(args)) return;
+
   ErrorThrower thrower(i_isolate, "WebAssembly.Instance()");
 
   auto maybe_module = GetFirstArgumentAsModule(args, &thrower);
   if (thrower.error()) return;
 
   auto maybe_imports = GetSecondArgumentAsImports(args, &thrower);
   if (!IsInstantiationAllowed(i_isolate, &thrower, args[0], maybe_imports,
                               false)) {
     return;
   }
   DCHECK(!thrower.error());
 
   i::MaybeHandle<i::Object> instance_object = i::wasm::SyncInstantiate(
       i_isolate, &thrower, maybe_module.ToHandleChecked(), maybe_imports,
       i::MaybeHandle<i::JSArrayBuffer>());
   if (instance_object.is_null()) return;
   args.GetReturnValue().Set(Utils::ToLocal(instance_object.ToHandleChecked()));
 }
 
 // WebAssembly.instantiate(module, imports) -> WebAssembly.Instance
 // WebAssembly.instantiate(bytes, imports) ->
 //     {module: WebAssembly.Module, instance: WebAssembly.Instance}
 void WebAssemblyInstantiate(const v8::FunctionCallbackInfo<v8::Value>& args) {
   v8::Isolate* isolate = args.GetIsolate();
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  if (i_isolate->wasm_instantiate_callback()(args)) return;
+
   ErrorThrower thrower(i_isolate, "WebAssembly.instantiate()");
 
   HandleScope scope(isolate);
 
   Local<Context> context = isolate->GetCurrentContext();
   i::Handle<i::Context> i_context = Utils::OpenHandle(*context);
 
   v8::Local<v8::Promise::Resolver> resolver;
   if (!v8::Promise::Resolver::New(context).ToLocal(&resolver)) return;
   v8::ReturnValue<v8::Value> return_value = args.GetReturnValue();
@@ skipping 589 matching lines @@
   i::Handle<i::Symbol> symbol(isolate->context()->wasm_memory_sym(), isolate);
   return HasBrand(value, symbol);
 }
 
 bool WasmJs::IsWasmTableObject(Isolate* isolate, Handle<Object> value) {
   i::Handle<i::Symbol> symbol(isolate->context()->wasm_table_sym(), isolate);
   return HasBrand(value, symbol);
 }
 }  // namespace internal
 }  // namespace v8