[wasm] Stack inspection support for asm.js frames

src/debug/mirrors.js

 // Copyright 2006-2012 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.
 
 (function(global, utils) {
 "use strict";
 
 // ----------------------------------------------------------------------------
 // Imports
 
@@ skipping 1860 matching lines @@
   // value returned from the VM might be a string if the function for the
   // frame is unresolved.
   if (IS_FUNCTION(f)) {
     return this.func_ = MakeMirror(f);
   } else {
     return new UnresolvedFunctionMirror(f);
   }
 };
 
 
+FrameMirror.prototype.script = function() {
+  if (!this.script_) {
+    this.script_ = MakeMirror(this.details_.script());
+  }
+
+  return this.script_;
+}
+
+
 FrameMirror.prototype.receiver = function() {
   return MakeMirror(this.details_.receiver());
 };
 
 
 FrameMirror.prototype.isConstructCall = function() {
   return this.details_.isConstructCall();
 };
 
 
@@ skipping 56 matching lines @@
   return MakeMirror(this.details_.returnValue());
 };
 
 
 FrameMirror.prototype.sourcePosition = function() {
   return this.details_.sourcePosition();
 };
 
 
 FrameMirror.prototype.sourceLocation = function() {
-  var func = this.func();
-  if (func.resolved()) {
-    var script = func.script();
-    if (script) {
-      return script.locationFromPosition(this.sourcePosition(), true);
-    }
+  var script = this.script();
+  if (script) {
+    return script.locationFromPosition(this.sourcePosition(), true);
   }
 };
 
 
 FrameMirror.prototype.sourceLine = function() {
   var location = this.sourceLocation();
   if (location) {
     return location.line;
   }
 };
@@ skipping 1106 matching lines @@
 // Functions needed by the debugger runtime.
 utils.InstallFunctions(utils, DONT_ENUM, [
   "ClearMirrorCache", ClearMirrorCache
 ]);
 
 // Export to debug.js
 utils.Export(function(to) {
   to.MirrorType = MirrorType;
 });
 })