[wasm] Skip serialization of breakpoints and certion stubs

src/snapshot/code-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/snapshot/code-serializer.h"
 
 #include <memory>
 
 #include "src/code-stubs.h"
 #include "src/log.h"
@@ skipping 211 matching lines @@
     if (result->script()->IsScript()) {
       Script* script = Script::cast(result->script());
       if (script->name()->IsString()) name = String::cast(script->name());
     }
     PROFILE(isolate, CodeCreateEvent(CodeEventListener::SCRIPT_TAG,
                                      result->abstract_code(), *result, name));
   }
   return scope.CloseAndEscape(result);
 }
 
+WasmCompiledModuleSerializer::WasmCompiledModuleSerializer(
+    Isolate* isolate, uint32_t source_hash, Handle<Context> native_context,
+    Handle<SeqOneByteString> module_bytes)
+    : CodeSerializer(isolate, source_hash) {
+  reference_map()->AddAttachedReference(*isolate->native_context());
+  reference_map()->AddAttachedReference(*module_bytes);
+}
+
 std::unique_ptr<ScriptData> WasmCompiledModuleSerializer::SerializeWasmModule(
     Isolate* isolate, Handle<FixedArray> input) {
   Handle<WasmCompiledModule> compiled_module =
       Handle<WasmCompiledModule>::cast(input);
-  WasmCompiledModuleSerializer wasm_cs(isolate, 0);
-  wasm_cs.reference_map()->AddAttachedReference(*isolate->native_context());
-  wasm_cs.reference_map()->AddAttachedReference(
-      compiled_module->module_bytes());
+  WasmCompiledModuleSerializer wasm_cs(isolate, 0, isolate->native_context(),
+                                       handle(compiled_module->module_bytes()));
   ScriptData* data = wasm_cs.Serialize(compiled_module);
   return std::unique_ptr<ScriptData>(data);
 }
 
 MaybeHandle<FixedArray> WasmCompiledModuleSerializer::DeserializeWasmModule(
     Isolate* isolate, ScriptData* data, Vector<const byte> wire_bytes) {
   SerializedCodeData::SanityCheckResult sanity_check_result =
       SerializedCodeData::CHECK_SUCCESS;
   MaybeHandle<FixedArray> nothing;
   const SerializedCodeData scd = SerializedCodeData::FromCachedData(
@@ skipping 20 matching lines @@
     deserializer.AddAttachedObject(
         CodeStub::GetCode(isolate, stub_keys[i]).ToHandleChecked());
   }
 
   MaybeHandle<HeapObject> obj = deserializer.DeserializeObject(isolate);
   if (obj.is_null() || !obj.ToHandleChecked()->IsFixedArray()) return nothing;
   // Cast without type checks, as the module wrapper is not there yet.
   Handle<WasmCompiledModule> compiled_module(
       static_cast<WasmCompiledModule*>(*obj.ToHandleChecked()), isolate);
 
-  WasmCompiledModule::RecreateModuleWrapper(isolate, compiled_module);
+  WasmCompiledModule::ReinitializeAfterDeserialization(isolate,
+                                                       compiled_module);
   DCHECK(WasmCompiledModule::IsWasmCompiledModule(*compiled_module));
   return compiled_module;
 }
 
+void WasmCompiledModuleSerializer::SerializeCodeObject(
+    Code* code_object, HowToCode how_to_code, WhereToPoint where_to_point) {
+  Code::Kind kind = code_object->kind();
+  switch (kind) {
+    case Code::WASM_FUNCTION:
+    case Code::JS_TO_WASM_FUNCTION:
+      // Just serialize the code_object.
+      break;
+    case Code::WASM_TO_JS_FUNCTION:
+      // Serialize the illegal builtin instead. On instantiation of a
+      // deserialized module, these will be replaced again.
+      code_object = *isolate()->builtins()->Illegal();
+      break;
+    default:
+      UNREACHABLE();
+  }
+  SerializeGeneric(code_object, how_to_code, where_to_point);
+}
+
+bool WasmCompiledModuleSerializer::ElideObject(Object* obj) {
+  return obj->IsWeakCell() || obj->IsForeign() || obj->IsBreakPointInfo();
+}
+
 class Checksum {
  public:
   explicit Checksum(Vector<const byte> payload) {
 #ifdef MEMORY_SANITIZER
     // Computing the checksum includes padding bytes for objects like strings.
     // Mark every object as initialized in the code serializer.
     MSAN_MEMORY_IS_INITIALIZED(payload.start(), payload.length());
 #endif  // MEMORY_SANITIZER
     // Fletcher's checksum. Modified to reduce 64-bit sums to 32-bit.
     uintptr_t a = 1;
@@ skipping 147 matching lines @@
   *rejection_result = scd.SanityCheck(isolate, expected_source_hash);
   if (*rejection_result != CHECK_SUCCESS) {
     cached_data->Reject();
     return SerializedCodeData(nullptr, 0);
   }
   return scd;
 }
 
 }  // namespace internal
 }  // namespace v8