[wasm] Allocate a single script per wasm module

src/frames.cc

 // Copyright 2012 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/frames.h"
 
 #include <memory>
 #include <sstream>
 
 #include "src/base/bits.h"
@@ skipping 1499 matching lines @@
 }
 
 uint32_t WasmFrame::function_index() const {
   FixedArray* deopt_data = LookupCode()->deoptimization_data();
   DCHECK(deopt_data->length() == 2);
   return Smi::cast(deopt_data->get(1))->value();
 }
 
 Script* WasmFrame::script() const {
   Handle<JSObject> instance(JSObject::cast(wasm_instance()), isolate());
-  if (wasm::WasmIsAsmJs(*instance, isolate())) {
-    return *wasm::GetAsmWasmScript(instance);
-  }
-  Handle<WasmDebugInfo> debug_info = wasm::GetDebugInfo(instance);
-  return WasmDebugInfo::GetFunctionScript(debug_info, function_index());
+  return *wasm::GetScript(instance);
 }
 
 int WasmFrame::position() const {
   int position = StandardFrame::position();
   if (wasm::WasmIsAsmJs(wasm_instance(), isolate())) {
     Handle<JSObject> instance(JSObject::cast(wasm_instance()), isolate());
     position =
         wasm::GetAsmWasmSourcePosition(instance, function_index(), position);
   }
   return position;
@@ skipping 439 matching lines @@
   for (StackFrameIterator it(isolate); !it.done(); it.Advance()) {
     StackFrame* frame = AllocateFrameCopy(it.frame(), zone);
     list.Add(frame, zone);
   }
   return list.ToVector();
 }
 
 
 }  // namespace internal
 }  // namespace v8