[wasm] Managed<T> ensures T's lifetime does not leak past Isolate's

test/cctest/wasm/wasm-run-utils.h

 // 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.
 
 #ifndef WASM_RUN_UTILS_H
 #define WASM_RUN_UTILS_H
 
 #include <setjmp.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ skipping 313 matching lines @@
         {type, true, WasmInitExpr(), global_offset, false, false});
     global_offset += size;
     // limit number of globals.
     CHECK_LT(global_offset, kMaxGlobalsSize);
     return &module->globals.back();
   }
 
   Handle<WasmInstanceObject> InitInstanceObject() {
     Handle<SeqOneByteString> empty_string = Handle<SeqOneByteString>::cast(
         isolate_->factory()->NewStringFromOneByte({}).ToHandleChecked());
-    Handle<Managed<wasm::WasmModule>> module_wrapper =
-        Managed<wasm::WasmModule>::New(isolate_, &module_, false);
+    // The lifetime of the wasm module is tied to this object's, and we cannot
+    // rely on the mechanics of Managed<T>.
+    Handle<Foreign> module_wrapper =
+        isolate_->factory()->NewForeign(reinterpret_cast<Address>(&module));
     Handle<Script> script =
         isolate_->factory()->NewScript(isolate_->factory()->empty_string());
     script->set_type(Script::TYPE_WASM);
     Handle<WasmSharedModuleData> shared_module_data =
         WasmSharedModuleData::New(isolate_, module_wrapper, empty_string,
                                   script, Handle<ByteArray>::null());
     Handle<WasmCompiledModule> compiled_module =
         WasmCompiledModule::New(isolate_, shared_module_data);
     // Minimally initialize the compiled module such that IsWasmCompiledModule
     // passes.
@@ skipping 480 matching lines @@
   void RunWasm_##name(WasmExecutionMode execution_mode)
 
 #define WASM_EXEC_COMPILED_TEST(name)                                \
   void RunWasm_##name(WasmExecutionMode execution_mode);             \
   TEST(RunWasmCompiled_##name) { RunWasm_##name(kExecuteCompiled); } \
   void RunWasm_##name(WasmExecutionMode execution_mode)
 
 }  // namespace
 
 #endif