[wasm] Data section without memory causes a validation error

src/wasm/wasm-module.h

 // 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.
 
 #ifndef V8_WASM_MODULE_H_
 #define V8_WASM_MODULE_H_
 
 #include <memory>
 
 #include "src/api.h"
@@ skipping 167 matching lines @@
   static const uint32_t kMinMemPages = 1;       // Minimum memory size = 64kb
   static const size_t kV8MaxPages = 16384;      // Maximum memory size = 1gb
   static const size_t kSpecMaxPages = 65536;    // Maximum according to the spec
   static const size_t kV8MaxTableSize = 16 * 1024 * 1024;
 
   Zone* owned_zone;
   const byte* module_start = nullptr;  // starting address for the module bytes
   const byte* module_end = nullptr;    // end address for the module bytes
   uint32_t min_mem_pages = 0;  // minimum size of the memory in 64k pages
   uint32_t max_mem_pages = 0;  // maximum size of the memory in 64k pages
+  bool has_memory = false;     // true if the memory was defined or imported
   bool mem_export = false;     // true if the memory is exported
   // TODO(wasm): reconcile start function index being an int with
   // the fact that we index on uint32_t, so we may technically not be
   // able to represent some start_function_index -es.
   int start_function_index = -1;      // start function, if any
   ModuleOrigin origin = kWasmOrigin;  // origin of the module
 
   std::vector<WasmGlobal> globals;             // globals in this module.
   uint32_t globals_size = 0;                   // size of globals table.
   uint32_t num_imported_functions = 0;         // number of imported functions.
@@ skipping 372 matching lines @@
                             int instance_count);
 void ValidateModuleState(Isolate* isolate, Handle<JSObject> wasm_module);
 void ValidateOrphanedInstance(Isolate* isolate, Handle<JSObject> instance);
 
 }  // namespace testing
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_H_