[debug-wrapper] Further extend the debug wrapper

test/mjsunit/es6/debug-evaluate-arrow-function-receiver.js

-// 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.
-
-// Flags: --expose-debug-as debug
-
-// Test that debug-evaluate can find the correct this value for an arrow
-// function, if "this" is referenced within the arrow function scope.
-
-Debug = debug.Debug
-
-var break_count = 0;
-var exception = null;
-
-function listener(event, exec_state, event_data, data) {
-  if (event != Debug.DebugEvent.Break) return;
-  try {
-    for (var i = 0; i < exec_state.frameCount() - 1; i++) {
-      var frame = exec_state.frame(i);
-      var this_value = frame.evaluate("this").value();
-      var expected = frame.sourceLineText().match(/\/\/ (.*$)/)[1];
-      print(expected, this_value, frame.sourceLineText());
-      assertEquals(String(expected), String(this_value));
-    }
-    break_count++;
-  } catch (e) {
-    exception = e;
-    print(e + e.stack);
-  }
-}
-
-// Context-allocated receiver.
-function f() {
-  debugger;                          // foo
-  return () => {
-    debugger;                        // foo
-    with ({}) {
-      return () => {
-        debugger;                    // foo
-        try {
-          throw new Error();
-        } catch (e) {
-          return () => {
-            (() => this);            // bind this.
-            debugger;                // foo
-            return () => {
-              debugger;              // undefined
-              return g.call("goo");  // undefined
-            }
-          };
-        }
-      };
-    }
-  };
-}
-
-// Stack-allocated receiver.
-function g() {
-  debugger;                        // goo
-  return () => {
-    debugger;                      // undefined
-    with ({}) {
-      return () => {
-        debugger;                  // undefined
-        try {
-          throw new Error();
-        } catch (e) {
-          return () => {
-            debugger;              // undefined
-            return f.call("foo");  // undefined
-          };
-        }
-      };
-    }
-  };
-}
-
-Debug.setListener(listener);
-
-var h = f.call("foo");
-for (var i = 0; i < 20; i++) h = h();
-var h = g.call("goo");
-for (var i = 0; i < 20; i++) h = h();
-
-function x() {
-  (() => this);      // bind this.
-  function y() {
-    (() => {
-      (() => this);  // bind this.
-      debugger;      // Y
-     })();           // Y
-  }
-  y.call("Y");       // X
-}
-x.call("X");
-
-function u() {
-  (() => this);
-  function v() {
-    (() => {
-      debugger;      // undefined
-     })();           // V
-  }
-  v.call("V");       // U
-}
-u.call("U");
-
-(() => {
-  (() => this);
-  debugger;          // [object global]
-})();
-
-Debug.setListener(null);
-
-assertEquals(55, break_count);
-assertNull(exception);