[debugger] Further stepping support in test wrapper

test/mjsunit/debug-stepin-builtin-callback.js

-// Copyright 2012 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Flags: --expose-debug-as debug
-
-// Test stepping into callbacks passed to builtin functions.
-
-Debug = debug.Debug
-
-var exception = null;
-
-function array_listener(event, exec_state, event_data, data) {
-  try {
-    if (event == Debug.DebugEvent.Break) {
-      print(event_data.sourceLineText(), breaks);
-      assertTrue(event_data.sourceLineText().indexOf(`B${breaks++}`) > 0);
-      exec_state.prepareStep(Debug.StepAction.StepIn);
-    }
-  } catch (e) {
-    print(e);
-    quit();
-    exception = e;
-  }
-};
-
-function cb_false(num) {
-  print("element " + num);  // B2 B5 B8
-  return false;             // B3 B6 B9
-}                           // B4 B7 B10
-
-function cb_true(num) {
-  print("element " + num);  // B2 B5 B8
-  return true;              // B3 B6 B9
-}                           // B4 B7 B10
-
-function cb_reduce(a, b) {
-  print("elements " + a + " and " + b);  // B2 B5
-  return a + b;                          // B3 B6
-}                                        // B4 B7
-
-var a = [1, 2, 3];
-
-var breaks = 0;
-Debug.setListener(array_listener);
-debugger;                 // B0
-a.forEach(cb_true);       // B1
-Debug.setListener(null);  // B11
-assertNull(exception);
-assertEquals(12, breaks);
-
-breaks = 0;
-Debug.setListener(array_listener);
-debugger;                 // B0
-a.some(cb_false);         // B1
-Debug.setListener(null);  // B11
-assertNull(exception);
-assertEquals(12, breaks);
-
-breaks = 0;
-Debug.setListener(array_listener);
-debugger;                 // B0
-a.every(cb_true);         // B1
-Debug.setListener(null);  // B11
-assertNull(exception);
-assertEquals(12, breaks);
-
-breaks = 0;
-Debug.setListener(array_listener);
-debugger;                 // B0
-a.map(cb_true);           // B1
-Debug.setListener(null);  // B11
-assertNull(exception);
-assertEquals(12, breaks);
-
-breaks = 0;
-Debug.setListener(array_listener);
-debugger;                 // B0
-a.filter(cb_true);        // B1
-Debug.setListener(null);  // B11
-assertNull(exception);
-assertEquals(12, breaks);
-
-breaks = 0;
-Debug.setListener(array_listener);
-debugger;                 // B0
-a.reduce(cb_reduce);      // B1
-Debug.setListener(null);  // B8
-assertNull(exception);
-assertEquals(9, breaks);
-
-breaks = 0;
-Debug.setListener(array_listener);
-debugger;                  // B0
-a.reduceRight(cb_reduce);  // B1
-Debug.setListener(null);   // B8
-assertNull(exception);
-assertEquals(9, breaks);
-
-
-// Test two levels of builtin callbacks:
-// Array.forEach calls a callback function, which by itself uses
-// Array.forEach with another callback function.
-
-function cb_true_2(num) {
-  print("element " + num);  // B3 B6 B9  B15 B18 B21 B27 B30 B33
-  return true;              // B4 B7 B10 B16 B19 B22 B28 B31 B34
-}                           // B5 B8 B11 B17 B20 B23 B29 B32 B35
-
-function cb_foreach(num) {
-  a.forEach(cb_true_2);     // B2  B14 B20 B26
-  print("back.");           // B12 B18 B24 B36
-}                           // B13 B19 B25 B37
-
-breaks = 0;
-Debug.setListener(array_listener);
-debugger;                   // B0
-a.forEach(cb_foreach);      // B1
-Debug.setListener(null);    // B38
-assertNull(exception);
-assertEquals(39, breaks);