[wasm] Fix serialization after instantiation

src/wasm/wasm-debug.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 <unordered_map>
 
 #include "src/assembler-inl.h"
 #include "src/assert-scope.h"
 #include "src/compiler/wasm-compiler.h"
 #include "src/debug/debug.h"
@@ skipping 76 matching lines @@
       instance_.mem_start =
           reinterpret_cast<byte*>(mem_buffer->backing_store());
       CHECK(mem_buffer->byte_length()->ToUint32(&instance_.mem_size));
     } else {
       DCHECK_EQ(0, instance_.module->min_mem_pages);
       instance_.mem_start = nullptr;
       instance_.mem_size = 0;
     }
 
     // Set pointer to globals storage.
-    if (instance->has_globals_buffer()) {
-      instance_.globals_start =
-          reinterpret_cast<byte*>(instance->globals_buffer()->backing_store());
-    }
+    instance_.globals_start =
+        debug_info->wasm_instance()->compiled_module()->GetGlobalsStartOrNull();
   }
 
   ~InterpreterHandle() {
     DCHECK_EQ(0, activations_.size());
   }
 
   static ModuleBytesEnv GetBytesEnv(WasmInstance* instance,
                                     WasmDebugInfo* debug_info) {
     // Return raw pointer into heap. The WasmInterpreter will make its own copy
     // of this data anyway, and there is no heap allocation in-between.
@@ skipping 432 matching lines @@
 }
 
 void WasmDebugInfo::Unwind(Address frame_pointer) {
   return GetInterpreterHandle(this)->Unwind(frame_pointer);
 }
 
 uint64_t WasmDebugInfo::NumInterpretedCalls() {
   auto handle = GetInterpreterHandleOrNull(this);
   return handle ? handle->NumInterpretedCalls() : 0;
 }