[debug-wrapper] Further extend the debug wrapper

test/mjsunit/es6/debug-exception-generators.js

-// 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.
-
-// Flags: --expose-debug-as debug
-
-Debug = debug.Debug
-
-var exception = null;
-var log = [];
-
-function listener(event, exec_state, event_data, data) {
-  if (event != Debug.DebugEvent.Exception) return;
-  try {
-    var line = exec_state.frame(0).sourceLineText();
-    var match = /Exception (\w)/.exec(line);
-    assertNotNull(match);
-    assertEquals(match[1], event_data.exception());
-    log.push(match[1]);
-  } catch (e) {
-    exception = e;
-  }
-}
-
-
-function* g() {
-  try {
-    throw "a";  // Ordinary throw. Exception a
-  } catch (e) {}
-  try {
-    yield 1;  // Caught internally. Exception b
-  } catch (e) {}
-  yield 2;
-  yield 3;    // Caught externally. Exception c
-  yield 4;
-}
-
-Debug.setListener(listener);
-Debug.setBreakOnException();
-var g_obj = g();
-assertEquals(1, g_obj.next().value);
-assertEquals(2, g_obj.throw("b").value);
-assertEquals(3, g_obj.next().value);
-assertThrows(() => g_obj.throw("c"));
-assertThrows(() => g_obj.throw("d"));  // Closed generator. Exception d
-Debug.setListener(null);
-Debug.clearBreakOnException();
-assertEquals(["a", "b", "c", "d"], log);
-assertNull(exception);