[wasm] Allocate a single script per wasm module

src/messages.cc

Index: src/messages.cc
diff --git a/src/messages.cc b/src/messages.cc
index 2726055c2ca8bdab7a43a28965105d0921413eac..7016aa61d02ead4c85e8bc9ae232d7f020d081b9 100644
--- a/src/messages.cc
+++ b/src/messages.cc
@@ -635,7 +635,9 @@ Handle<Object> WasmStackFrame::GetFunction() const {
 }
 
 Handle<Object> WasmStackFrame::GetFunctionName() {
-  return wasm::GetWasmFunctionNameOrNull(isolate_, wasm_instance_,
+  Handle<wasm::WasmCompiledModule> compiled_module(
+      wasm::GetCompiledModule(JSObject::cast(*wasm_instance_)), isolate_);
+  return wasm::GetWasmFunctionNameOrNull(isolate_, compiled_module,
                                          wasm_func_index_);
 }
 
@@ -683,18 +685,15 @@ Handle<Object> AsmJsWasmStackFrame::GetFunction() const {
 
 Handle<Object> AsmJsWasmStackFrame::GetFileName() {
   Handle<Script> script =
-      wasm::GetAsmWasmScript(Handle<JSObject>::cast(wasm_instance_));
+      wasm::GetScript(Handle<JSObject>::cast(wasm_instance_));
+  DCHECK_EQ(Script::TYPE_NORMAL, script->type());
   return handle(script->name(), isolate_);
 }
 
-Handle<Object> AsmJsWasmStackFrame::GetFunctionName() {
-  return wasm::GetWasmFunctionNameOrNull(isolate_, wasm_instance_,
-                                         wasm_func_index_);
-}
-
 Handle<Object> AsmJsWasmStackFrame::GetScriptNameOrSourceUrl() {
   Handle<Script> script =
-      wasm::GetAsmWasmScript(Handle<JSObject>::cast(wasm_instance_));
+      wasm::GetScript(Handle<JSObject>::cast(wasm_instance_));
+  DCHECK_EQ(Script::TYPE_NORMAL, script->type());
   return ScriptNameOrSourceUrl(script, isolate_);
 }
 
@@ -708,14 +707,16 @@ int AsmJsWasmStackFrame::GetPosition() const {
 int AsmJsWasmStackFrame::GetLineNumber() {
   DCHECK_LE(0, GetPosition());
   Handle<Script> script =
-      wasm::GetAsmWasmScript(Handle<JSObject>::cast(wasm_instance_));
+      wasm::GetScript(Handle<JSObject>::cast(wasm_instance_));
+  DCHECK_EQ(Script::TYPE_NORMAL, script->type());
   return Script::GetLineNumber(script, GetPosition()) + 1;
 }
 
 int AsmJsWasmStackFrame::GetColumnNumber() {
   DCHECK_LE(0, GetPosition());
   Handle<Script> script =
-      wasm::GetAsmWasmScript(Handle<JSObject>::cast(wasm_instance_));
+      wasm::GetScript(Handle<JSObject>::cast(wasm_instance_));
+  DCHECK_EQ(Script::TYPE_NORMAL, script->type());
   return Script::GetColumnNumber(script, GetPosition()) + 1;
 }