v8: backport pieces from 99743ad460e

Backport new virtual methods from
99743ad460e (“[wasm] Transferrable modules”).

Ref: https://codereview.chromium.org/2748473004
Ref: v8/v8@99743ad460e

PR-URL: #12875
Reviewed-By: James M Snell <[email protected]>

Author: addaleax

deps/v8/include/v8.h

@@ -108,6 +108,7 @@ class Private;
 class Uint32;
 class Utils;
 class Value;
+class WasmCompiledModule;
 template <class T> class Local;
 template <class T>
 class MaybeLocal;
@@ -1707,6 +1708,8 @@ class V8_EXPORT ValueSerializer {
     virtual Maybe<uint32_t> GetSharedArrayBufferId(
         Isolate* isolate, Local<SharedArrayBuffer> shared_array_buffer);
 
+    virtual Maybe<uint32_t> GetWasmModuleTransferId(
+        Isolate* isolate, Local<WasmCompiledModule> module);
     /*
      * Allocates memory for the buffer of at least the size provided. The actual
      * size (which may be greater or equal) is written to |actual_size|. If no
@@ -1817,6 +1820,13 @@ class V8_EXPORT ValueDeserializer {
      * MaybeLocal<Object>() returned.
      */
     virtual MaybeLocal<Object> ReadHostObject(Isolate* isolate);
+
+    /*
+     * Get a WasmCompiledModule given a transfer_id previously provided
+     * by ValueSerializer::GetWasmModuleTransferId
+     */
+    virtual MaybeLocal<WasmCompiledModule> GetWasmModuleFromId(
+        Isolate* isolate, uint32_t transfer_id);
   };
 
   ValueDeserializer(Isolate* isolate, const uint8_t* data, size_t size);

deps/v8/src/api.cc

@@ -3119,6 +3119,11 @@ Maybe<uint32_t> ValueSerializer::Delegate::GetSharedArrayBufferId(
   return Nothing<uint32_t>();
 }
 
+Maybe<uint32_t> ValueSerializer::Delegate::GetWasmModuleTransferId(
+    Isolate* v8_isolate, Local<WasmCompiledModule> module) {
+  return Nothing<uint32_t>();
+}
+
 void* ValueSerializer::Delegate::ReallocateBufferMemory(void* old_buffer,
                                                         size_t size,
                                                         size_t* actual_size) {
@@ -3207,6 +3212,15 @@ MaybeLocal<Object> ValueDeserializer::Delegate::ReadHostObject(
   return MaybeLocal<Object>();
 }
 
+MaybeLocal<WasmCompiledModule> ValueDeserializer::Delegate::GetWasmModuleFromId(
+    Isolate* v8_isolate, uint32_t id) {
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
+  isolate->ScheduleThrow(*isolate->factory()->NewError(
+      isolate->error_function(),
+      i::MessageTemplate::kDataCloneDeserializationError));
+  return MaybeLocal<WasmCompiledModule>();
+}
+
 struct ValueDeserializer::PrivateData {
   PrivateData(i::Isolate* i, i::Vector<const uint8_t> data, Delegate* delegate)
       : isolate(i), deserializer(i, data, delegate) {}